diff options
| -rw-r--r-- | include/usage.h | 5 | ||||
| -rw-r--r-- | libbb/llist.c | 2 | ||||
| -rw-r--r-- | modutils/Config.in | 238 | ||||
| -rw-r--r-- | modutils/Kbuild | 13 | ||||
| -rw-r--r-- | modutils/depmod.c | 378 | ||||
| -rw-r--r-- | modutils/insmod.c | 4271 | ||||
| -rw-r--r-- | modutils/lsmod.c | 201 | ||||
| -rw-r--r-- | modutils/modprobe.c | 1103 | ||||
| -rw-r--r-- | modutils/modutils-24.c | 3936 | ||||
| -rw-r--r-- | modutils/modutils.c | 141 | ||||
| -rw-r--r-- | modutils/modutils.h | 68 | ||||
| -rw-r--r-- | modutils/rmmod.c | 87 |
12 files changed, 4698 insertions, 5745 deletions
diff --git a/include/usage.h b/include/usage.h index f4fc2e67a..71e9f42e8 100644 --- a/include/usage.h +++ b/include/usage.h @@ -2569,12 +2569,17 @@ "[-knqrsv] MODULE [symbol=value...]" #define modprobe_full_usage "\n\n" \ "Options:" \ + USE_FEATURE_2_4_MODULES( \ "\n -k Make module autoclean-able" \ + ) \ "\n -n Dry run" \ "\n -q Quiet" \ "\n -r Remove module (stacks) or do autoclean" \ "\n -s Report via syslog instead of stderr" \ "\n -v Verbose" \ + USE_FEATURE_MODPROBE_BLACKLIST( \ + "\n -b Apply blacklist to module names too" \ + ) #define modprobe_notes_usage \ "modprobe can (un)load a stack of modules, passing each module options (when\n" \ diff --git a/libbb/llist.c b/libbb/llist.c index 094c65246..2bef43151 100644 --- a/libbb/llist.c +++ b/libbb/llist.c @@ -90,7 +90,6 @@ void FAST_FUNC llist_free(llist_t *elm, void (*freeit) (void *data)) } } -#ifdef UNUSED /* Reverse list order. */ llist_t* FAST_FUNC llist_rev(llist_t *list) { @@ -105,4 +104,3 @@ llist_t* FAST_FUNC llist_rev(llist_t *list) } return rev; } -#endif diff --git a/modutils/Config.in b/modutils/Config.in index a430fcac3..e7b839db9 100644 --- a/modutils/Config.in +++ b/modutils/Config.in @@ -5,6 +5,20 @@ menu "Linux Module Utilities" +config DEFAULT_MODULES_DIR + string "Default directory containing modules" + default "/lib/modules" + help + Directory that contains kernel modules. + Defaults to "/lib/modules" + +config DEFAULT_DEPMOD_FILE + string "Default name of modules.dep" + default "modules.dep" + help + Filename that contains kernel modules dependencies. + Defaults to "modules.dep" + config MODPROBE_SMALL bool "Simplified modutils" default n @@ -54,48 +68,83 @@ config FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED Check if the module is already loaded. N.B. It's racy. -config DEPMOD - bool "depmod" +config INSMOD + bool "insmod" default n depends on !MODPROBE_SMALL help - depmod generates modules.dep (FIXME: elaborate) + insmod is used to load specified modules in the running kernel. -config FEATURE_DEPMOD_PRUNE_FANCY - bool "Fancy dependency pruning" +config RMMOD + bool "rmmod" default n - depends on DEPMOD + depends on !MODPROBE_SMALL help - By default modules.dep contains all dependencies as listed by - the modules. - If you enable this option then we remove implied modules from - the dependencies. - This makes depmod somewhat bigger but generates a smaller - modules.dep file. + rmmod is used to unload specified modules from the kernel. - If unsure, say N. +config LSMOD + bool "lsmod" + default n + depends on !MODPROBE_SMALL + help + lsmod is used to display a list of loaded modules. -config FEATURE_DEPMOD_ALIAS - bool "Alias support" +config FEATURE_LSMOD_PRETTY_2_6_OUTPUT + bool "Pretty output" default n - depends on DEPMOD + depends on LSMOD help - By default modules.dep does not contain alias information. - Enable this to emit aliases of the form: + This option makes output format of lsmod adjusted to + the format of module-init-tools for Linux kernel 2.6. + Increases size somewhat. - alias pcmcia:m*c*f03fn*pfn*pa*pb*pc*pd* parport_cs +config MODPROBE + bool "modprobe" + default n + depends on !MODPROBE_SMALL + help + Handle the loading of modules, and their dependencies on a high + level. -config INSMOD - bool "insmod" + Note that in the state, modprobe does not understand multiple + module options from the configuration file. See option below. + +config FEATURE_MODPROBE_BLACKLIST + bool + prompt "Blacklist support" + default n + depends on MODPROBE + help + Say 'y' here to enable support for the 'blacklist' command in + modprobe.conf. This prevents the alias resolver to resolve + blacklisted modules. This is useful if you want to prevent your + hardware autodetection scripts to load modules like evdev, frame + buffer drivers etc. + +config DEPMOD + bool "depmod" default n depends on !MODPROBE_SMALL help - insmod is used to load specified modules in the running kernel. + depmod generates modules.dep (and potentially modules.alias + and modules.symbols) that contain dependency information + for modprobe. + +comment "Options common to multiple modutils" + +config FEATURE_2_4_MODULES + bool "Support version 2.2/2.4 Linux kernels" + default n + depends on INSMOD || RMMOD || LSMOD + help + Support module loading for 2.2.x and 2.4.x Linux kernels. + This increases size considerably. Say N unless you plan + to run ancient kernels. config FEATURE_INSMOD_VERSION_CHECKING - bool "Module version checking" + bool "Enable module version checking" default n - depends on INSMOD && FEATURE_2_4_MODULES + depends on FEATURE_2_4_MODULES && (INSMOD || MODPROBE) help Support checking of versions for modules. This is used to ensure that the kernel and module are made for each other. @@ -103,7 +152,7 @@ config FEATURE_INSMOD_VERSION_CHECKING config FEATURE_INSMOD_KSYMOOPS_SYMBOLS bool "Add module symbols to kernel symbol table" default n - depends on INSMOD && FEATURE_2_4_MODULES + depends on FEATURE_2_4_MODULES && (INSMOD || MODPROBE) help By adding module symbols to the kernel symbol table, Oops messages occuring within kernel modules can be properly debugged. By enabling @@ -114,7 +163,7 @@ config FEATURE_INSMOD_KSYMOOPS_SYMBOLS config FEATURE_INSMOD_LOADINKMEM bool "In kernel memory optimization (uClinux only)" default n - depends on INSMOD && FEATURE_2_4_MODULES + depends on FEATURE_2_4_MODULES && (INSMOD || MODPROBE) help This is a special uClinux only memory optimization that lets insmod load the specified kernel module directly into kernel space, reducing @@ -122,9 +171,9 @@ config FEATURE_INSMOD_LOADINKMEM being loaded into memory. config FEATURE_INSMOD_LOAD_MAP - bool "Enable load map (-m) option" + bool "Enable insmod load map (-m) option" default n - depends on INSMOD && ( FEATURE_2_4_MODULES || FEATURE_2_6_MODULES ) + depends on FEATURE_2_4_MODULES && INSMOD help Enabling this, one would be able to get a load map output on stdout. This makes kernel module debugging @@ -135,138 +184,47 @@ config FEATURE_INSMOD_LOAD_MAP config FEATURE_INSMOD_LOAD_MAP_FULL bool "Symbols in load map" default y - depends on FEATURE_INSMOD_LOAD_MAP + depends on FEATURE_INSMOD_LOAD_MAP && !MODPROBE_SMALL help Without this option, -m will only output section load map. With this option, -m will also output symbols load map. -config RMMOD - bool "rmmod" - default n - depends on !MODPROBE_SMALL - help - rmmod is used to unload specified modules from the kernel. - -config LSMOD - bool "lsmod" - default n - depends on !MODPROBE_SMALL - help - lsmod is used to display a list of loaded modules. - -config FEATURE_LSMOD_PRETTY_2_6_OUTPUT - bool "Pretty output for 2.6.x Linux kernels" - default n - depends on LSMOD - help - This option makes output format of lsmod adjusted to - the format of module-init-tools for Linux kernel 2.6. - -config MODPROBE - bool "modprobe" - default n - depends on !MODPROBE_SMALL - help - Handle the loading of modules, and their dependencies on a high - level. - - Note that in the state, modprobe does not understand multiple - module options from the configuration file. See option below. - -config FEATURE_MODPROBE_MULTIPLE_OPTIONS - bool - prompt "Multiple options parsing" - default y - depends on MODPROBE - help - Allow modprobe to understand more than one option to pass to - modules. - - This is a WIP, while waiting for a common argument parsing - common amongst all BB applets (shell, modprobe, etc...) and - adds around 600 bytes on x86, 700 bytes on ARM. The code is - biggish and uggly, but just works. - - Saying Y here is not a bad idea if you're not that short - on storage capacity. - -config FEATURE_MODPROBE_FANCY_ALIAS - bool - prompt "Fancy alias parsing" - default y - depends on MODPROBE && FEATURE_2_6_MODULES - help - Say 'y' here to enable parsing of aliases with underscore/dash - mismatch between module name and file name, along with bus-specific - aliases (such as pci:... or usb:... aliases). - -config FEATURE_MODPROBE_BLACKLIST - bool - prompt "Blacklist support" - default n - depends on MODPROBE && FEATURE_2_6_MODULES - help - Say 'y' here to enable support for the 'blacklist' command in - modprobe.conf. This prevents the alias resolver to resolve - blacklisted modules. This is useful if you want to prevent your - hardware autodetection scripts to load modules like evdev, frame - buffer drivers etc. - -comment "Options common to multiple modutils" - depends on INSMOD || RMMOD || MODPROBE || LSMOD || DEPMOD - config FEATURE_CHECK_TAINTED_MODULE - # Simulate indentation bool "Support tainted module checking with new kernels" default y - depends on INSMOD || LSMOD + depends on !MODPROBE_SMALL help Support checking for tainted modules. These are usually binary only modules that will make the linux-kernel list ignore your support request. This option is required to support GPLONLY modules. -config FEATURE_2_4_MODULES - # Simulate indentation - bool "Support version 2.2.x to 2.4.x Linux kernels" +config FEATURE_MODUTILS_ALIAS + bool "Support for module.aliases file" default y - depends on INSMOD || RMMOD || MODPROBE + depends on DEPMOD || MODPROBE help - Support module loading for 2.2.x and 2.4.x Linux kernels. + Generate and parse modules.alias containing aliases for bus + identifiers: + alias pcmcia:m*c*f03fn*pfn*pa*pb*pc*pd* parport_cs - Note: - This is automatically enabled if 2.6 modules are not enabled. + and aliases for logical modules names e.g.: + alias padlock_aes aes + alias aes_i586 aes + alias aes_generic aes -config FEATURE_2_6_MODULES - # Simulate indentation - bool "Support version 2.6.x Linux kernels" - default y - depends on INSMOD || RMMOD || MODPROBE - help - Support module loading for newer 2.6.x Linux kernels. - -config DEFAULT_MODULES_DIR - # Simulate indentation - string "Default directory containing modules" - default "/lib/modules" - depends on INSMOD || RMMOD || MODPROBE || MODPROBE_SMALL || DEPMOD - help - Directory that contains kernel modules. - Defaults to "/lib/modules" + Say Y if unsure. -config DEFAULT_DEPMOD_FILE - # Simulate indentation - string "Default name of modules.dep" - default "modules.dep" - depends on INSMOD || RMMOD || MODPROBE || MODPROBE_SMALL || DEPMOD +config FEATURE_MODUTILS_SYMBOLS + bool "Support for module.symbols file" + default y + depends on DEPMOD || MODPROBE help - Filename that contains kernel modules dependencies. - Defaults to "modules.dep" + Generate and parse modules.symbols containing aliases for + symbol_request() kernel calls, such as: + alias symbol:usb_sg_init usbcore -config FEATURE_QUERY_MODULE_INTERFACE - bool - default y - depends on FEATURE_2_4_MODULES && !FEATURE_2_6_MODULES + Say Y if unsure. endmenu diff --git a/modutils/Kbuild b/modutils/Kbuild index 828070114..31f7cbf93 100644 --- a/modutils/Kbuild +++ b/modutils/Kbuild @@ -5,9 +5,10 @@ # Licensed under the GPL v2, see the file LICENSE in this tarball. lib-y:= -lib-$(CONFIG_DEPMOD) += depmod.o -lib-$(CONFIG_INSMOD) += insmod.o -lib-$(CONFIG_LSMOD) += lsmod.o -lib-$(CONFIG_MODPROBE) += modprobe.o -lib-$(CONFIG_MODPROBE_SMALL) += modprobe-small.o -lib-$(CONFIG_RMMOD) += rmmod.o +lib-$(CONFIG_MODPROBE_SMALL) += modprobe-small.o +lib-$(CONFIG_DEPMOD) += depmod.o modutils.o +lib-$(CONFIG_INSMOD) += insmod.o modutils.o +lib-$(CONFIG_LSMOD) += lsmod.o modutils.o +lib-$(CONFIG_MODPROBE) += modprobe.o modutils.o +lib-$(CONFIG_RMMOD) += rmmod.o modutils.o +lib-$(CONFIG_FEATURE_2_4_MODULES) += modutils-24.o diff --git a/modutils/depmod.c b/modutils/depmod.c index b6a914eb0..35df4a8e2 100644 --- a/modutils/depmod.c +++ b/modutils/depmod.c @@ -2,6 +2,8 @@ /* * depmod - generate modules.dep * Copyright (c) 2008 Bernhard Fischer + * Copyrihgt (c) 2008 Timo Teras <timo.teras@iki.fi> + * Copyright (c) 2008 Vladimir Dronnikov * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ @@ -10,6 +12,8 @@ #define _GNU_SOURCE #include <libbb.h> #include <sys/utsname.h> /* uname() */ +#include "modutils.h" + /* * Theory of operation: * - iterate over all modules and record their full path @@ -17,272 +21,194 @@ * for each depends, look through our list of full paths and emit if found */ -typedef struct dep_lst_t { - char *name; +typedef struct module_info { + struct module_info *next; + char *name, *modname; llist_t *dependencies; llist_t *aliases; - struct dep_lst_t *next; -} dep_lst_t; - -struct globals { - dep_lst_t *lst; /* modules without their corresponding extension */ + llist_t *symbols; + struct module_info *dnext, *dprev; +} module_info; + +enum { + ARG_a = (1<<0), /* All modules, ignore mods in argv */ + ARG_A = (1<<1), /* Only emit .ko that are newer than modules.dep file */ + ARG_b = (1<<2), /* not /lib/modules/$(uname -r)/ but this base-dir */ + ARG_e = (1<<3), /* with -F, print unresolved symbols */ + ARG_F = (1<<4), /* System.map that contains the symbols */ + ARG_n = (1<<5) /* dry-run, print to stdout only */ }; -#define G (*(struct globals*)&bb_common_bufsiz1) -/* We have to zero it out because of NOEXEC */ -#define INIT_G() memset(&G, 0, sizeof(G)) -static char* find_keyword(void *the_module, size_t len, const char * const word) +static int FAST_FUNC parse_module(const char *fname, struct stat *sb, + void *data, int UNUSED_PARAM depth) { - char *ptr = the_module; - do { - /* search for the first char in word */ - ptr = memchr(ptr, *word, len - (ptr - (char*)the_module)); - if (ptr == NULL) /* no occurance left, done */ - return NULL; - if (!strncmp(ptr, word, strlen(word))) { - ptr += strlen(word); - break; + module_info **first = (module_info **) data; + char *image, *ptr; + module_info *info; + size_t len = sb->st_size; + + if (strrstr(fname, ".ko") == NULL) + return TRUE; + + image = (char *) xmalloc_open_zipped_read_close(fname, &len); + info = xzalloc(sizeof(module_info)); + + info->next = *first; + *first = info; + + info->dnext = info->dprev = info; + info->name = xstrdup(fname); + info->modname = filename2modname(fname, NULL); + for (ptr = image; ptr < image + len - 10; ptr++) { + if (strncmp(ptr, "depends=", 8) == 0) { + char *u; + + ptr += 8; + for (u = ptr; *u; u++) + if (*u == '-') + *u = '_'; + ptr += string_to_llist(ptr, &info->dependencies, ","); + } else if (ENABLE_FEATURE_MODUTILS_ALIAS && + strncmp(ptr, "alias=", 6) == 0) { + llist_add_to(&info->aliases, xstrdup(ptr + 6)); + ptr += strlen(ptr); + } else if (ENABLE_FEATURE_MODUTILS_SYMBOLS && + strncmp(ptr, "__ksymtab_", 10) == 0) { + ptr += 10; + if (strncmp(ptr, "gpl", 3) == 0 || + strcmp(ptr, "strings") == 0) + continue; + llist_add_to(&info->symbols, xstrdup(ptr)); + ptr += strlen(ptr); } - ++ptr; - } while (1); - return ptr; + } + free(image); + + return TRUE; } -static int FAST_FUNC fileAction(const char *fname, struct stat *sb, - void UNUSED_PARAM *data, int UNUSED_PARAM depth) -{ - size_t len = sb->st_size; - void *the_module; - char *ptr; - int fd; - char *depends, *deps; - dep_lst_t *this; - if (strrstr(fname, ".ko") == NULL) /* not a module */ - goto skip; +static module_info *find_module(module_info *modules, const char *modname) +{ + module_info *m; -/*XXX: FIXME: does not handle compressed modules! - * There should be a function that looks at the extension and sets up - * open_transformer for us. - */ - fd = xopen(fname, O_RDONLY); - the_module = mmap(NULL, len, PROT_READ, MAP_SHARED -#if defined MAP_POPULATE - |MAP_POPULATE -#endif - , fd, 0); - close(fd); - if (the_module == MAP_FAILED) - bb_perror_msg_and_die("mmap"); + for (m = modules; m != NULL; m = m->next) + if (strcmp(m->modname, modname) == 0) + return m; + return NULL; +} - this = xzalloc(sizeof(dep_lst_t)); - this->name = xstrdup(fname); - this->next = G.lst; - G.lst = this; -//bb_info_msg("fname='%s'", fname); - ptr = find_keyword(the_module, len, "depends="); - if (!*ptr) - goto d_none; - deps = depends = xstrdup(ptr); -//bb_info_msg(" depends='%s'", depends); - while (deps) { - ptr = strsep(&deps, ","); -//bb_info_msg("[%s] -> '%s'", fname, (char*)ptr); - llist_add_to_end(&this->dependencies, xstrdup(ptr)); - } - free(depends); - d_none: - if (ENABLE_FEATURE_DEPMOD_ALIAS) - { - size_t pos = 0; - do { - ptr = find_keyword(the_module + pos, len - pos, "alias="); - if (ptr) { -//bb_info_msg("[%s] alias '%s'", fname, (char*)ptr); - llist_add_to_end(&this->aliases, xstrdup(ptr)); - } else - break; - pos = (ptr - (char*)the_module); - } while (1); +static void order_dep_list(module_info *modules, module_info *start, + llist_t *add) +{ + module_info *m; + llist_t *n; + + for (n = add; n != NULL; n = n->link) { + m = find_module(modules, n->data); + if (m == NULL) + continue; + + /* unlink current entry */ + m->dnext->dprev = m->dprev; + m->dprev->dnext = m->dnext; + + /* and add it to tail */ + m->dnext = start; + m->dprev = start->dprev; + start->dprev->dnext = m; + start->dprev = m; + + /* recurse */ + order_dep_list(modules, start, m->dependencies); } - munmap(the_module, sb->st_size); - skip: - return TRUE; } int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int depmod_main(int argc UNUSED_PARAM, char **argv) { - int ret; - size_t moddir_base_len = 0; /* length of the "-b basedir" */ - char *moddir_base = NULL, *moddir, *system_map, *chp; - FILE *filedes = stdout; - enum { - ARG_a = (1<<0), /* All modules, ignore mods in argv */ - ARG_A = (1<<1), /* Only emit .ko that are newer than modules.dep file */ - ARG_b = (1<<2), /* not /lib/modules/$(uname -r)/ but this base-dir */ - ARG_e = (1<<3), /* with -F, print unresolved symbols */ - ARG_F = (1<<4), /* System.map that contains the symbols */ - ARG_n = (1<<5) /* dry-run, print to stdout only */ - }; - INIT_G(); + module_info *modules = NULL, *m, *dep; + char *moddir_base = (char *)CONFIG_DEFAULT_MODULES_DIR; + int tmp; - getopt32(argv, "aAb:eF:n", &moddir_base, &system_map); + getopt32(argv, "aAb:eF:n", &moddir_base, NULL); argv += optind; - /* If a version is provided, then that kernel version’s module directory + /* goto modules location */ + + /* If a version is provided, then that kernel version's module directory * is used, rather than the current kernel version (as returned by * "uname -r"). */ - if (*argv && (sscanf(*argv, "%d.%d.%d", &ret, &ret, &ret) == 3)) { - moddir = concat_path_file(CONFIG_DEFAULT_MODULES_DIR, *argv++); + xchdir(moddir_base); + if (*argv && (sscanf(*argv, "%d.%d.%d", &tmp, &tmp, &tmp) == 3)) { + xchdir(*argv++); } else { struct utsname uts; - if (uname(&uts) < 0) - bb_simple_perror_msg_and_die("uname"); - moddir = concat_path_file(CONFIG_DEFAULT_MODULES_DIR, uts.release); + uname(&uts); + xchdir(uts.release); } /* If no modules are given on the command-line, -a is on per default. */ option_mask32 |= *argv == NULL; - if (option_mask32 & ARG_b) { - moddir_base_len = strlen(moddir_base) + 1; - xchdir(moddir_base); - } - - if (!(option_mask32 & ARG_n)) { /* --dry-run */ - chp = concat_path_file(moddir, CONFIG_DEFAULT_DEPMOD_FILE); - filedes = xfopen_for_write(chp); - if (ENABLE_FEATURE_CLEAN_UP) - free(chp); - } - ret = EXIT_SUCCESS; + /* Scan modules */ + moddir_base = xrealloc_getcwd_or_warn(NULL); do { - chp = option_mask32 & ARG_a ? moddir : (*argv + moddir_base_len); - - if (!recursive_action(chp, - ACTION_RECURSE, /* flags */ - fileAction, /* file action */ - NULL, /* dir action */ - NULL, /* user data */ - 0)) { /* depth */ - ret = EXIT_FAILURE; + recursive_action((option_mask32 & ARG_a) ? moddir_base : *argv, + ACTION_RECURSE, parse_module, NULL, &modules, 0); + } while (!(option_mask32 & ARG_a) && *(++argv)); + if (ENABLE_FEATURE_CLEAN_UP) + free(moddir_base); + + /* Generate dependency and alias files */ + if (!(option_mask32 & ARG_n)) + freopen(CONFIG_DEFAULT_DEPMOD_FILE, "w", stdout); + for (m = modules; m != NULL; m = m->next) { + printf("%s:", m->name); + + order_dep_list(modules, m, m->dependencies); + while (m->dnext != m) { + dep = m->dnext; + printf(" %s", dep->name); + + /* unlink current entry */ + dep->dnext->dprev = dep->dprev; + dep->dprev->dnext = dep->dnext; + dep->dnext = dep->dprev = dep; } - } while (!(option_mask32 & ARG_a) && *++argv); - - { - dep_lst_t *mods = G.lst; - - /* Fixup the module names in the depends list */ - while (mods) { - llist_t *deps = NULL, *old_deps = mods->dependencies; - - while (old_deps) { - dep_lst_t *all = G.lst; - char *longname = NULL; - char *shortname = llist_pop(&old_deps); - - while (all) { - char *nam = - xstrdup(bb_get_last_path_component_nostrip(all->name)); - char *tmp = strrstr(nam, ".ko"); - - *tmp = '\0'; - if (!strcmp(nam, shortname)) { - if (ENABLE_FEATURE_CLEAN_UP) - free(nam); - longname = all->name; - break; - } - free(nam); - all = all->next; - } - llist_add_to_end(&deps, longname); - } - mods->dependencies = deps; - mods = mods->next; + puts(""); } -#if ENABLE_FEATURE_DEPMOD_PRUNE_FANCY - /* modprobe allegedly wants dependencies without duplicates, i.e. - * mod1: mod2 mod3 - * mod2: mod3 - * mod3: - * implies that mod1 directly depends on mod2 and _not_ mod3 as mod3 is - * already implicitely pulled in via mod2. This leaves us with: - * mod1: mod2 - * mod2: mod3 - * mod3: - */ - mods = G.lst; - while (mods) { - llist_t *deps = mods->dependencies; - while (deps) { - dep_lst_t *all = G.lst; - while (all) { - if (!strcmp(all->name, deps->data)) { - llist_t *implied = all->dependencies; - while (implied) { - /* XXX:FIXME: erm, it would be nicer to just - * llist_unlink(&mods->dependencies, implied) */ - llist_t *prune = mods->dependencies; - while (prune) { - if (!strcmp(implied->data, prune->data)) - break; - prune = prune->link; - } -//if (prune) bb_info_msg("[%s] '%s' implies '%s', removing", mods->name, all->name, implied->data); - llist_unlink(&mods->dependencies, prune); - implied = implied->link; - } - } - all = all->next; - } - deps = deps->link; +#if ENABLE_FEATURE_MODUTILS_ALIAS + if (!(option_mask32 & ARG_n)) + freopen("modules.alias", "w", stdout); + for (m = modules; m != NULL; m = m->next) { + while (m->aliases) { + printf("alias %s %s\n", + (char*)llist_pop(&m->aliases), + m->modname); } - mods = mods->next; } #endif - - mods = G.lst; - /* Finally print them. */ - while (mods) { - fprintf(filedes, "%s:", mods->name); - /* If we did not resolve all modules, then it's likely that we just did - * not see the names of all prerequisites (which will be NULL in this - * case). */ - while (mods->dependencies) { - char *the_dep = llist_pop(&mods->dependencies); - if (the_dep) - fprintf(filedes, " %s", the_dep); - } - fprintf(filedes, "\n"); - if (ENABLE_FEATURE_DEPMOD_ALIAS) - { - char *shortname = - xstrdup(bb_get_last_path_component_nostrip(mods->name)); - char *tmp = strrstr(shortname, ".ko"); - - *tmp = '\0'; - - while (mods->aliases) { - fprintf(filedes, "alias %s %s\n", - (char*)llist_pop(&mods->aliases), - shortname); - } - free(shortname); +#if ENABLE_FEATURE_MODUTILS_SYMBOLS + if (!(option_mask32 & ARG_n)) + freopen("modules.symbols", "w", stdout); + for (m = modules; m != NULL; m = m->next) { + while (m->symbols) { + printf("alias symbol:%s %s\n", + (char*)llist_pop(&m->symbols), + m->modname); } - mods = mods->next; - } } +#endif if (ENABLE_FEATURE_CLEAN_UP) { - fclose_if_not_stdin(filedes); - free(moddir); - while (G.lst) { - dep_lst_t *old = G.lst; - G.lst = G.lst->next; + while (modules) { + module_info *old = modules; + modules = modules->next; free(old->name); + free(old->modname); free(old); } } - return ret; + + return EXIT_SUCCESS; } diff --git a/modutils/insmod.c b/modutils/insmod.c index f1bb4cdec..61ee5009b 100644 --- a/modutils/insmod.c +++ b/modutils/insmod.c @@ -2,4277 +2,32 @@ /* * Mini insmod implementation for busybox * - * This version of insmod supports ARM, CRIS, H8/300, x86, ia64, x86_64, - * m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64. - * - * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> - * and Ron Alder <alder@lineo.com> - * - * Rodney Radford <rradford@mindspring.com> 17-Aug-2004. - * Added x86_64 support. - * - * Miles Bader <miles@gnu.org> added NEC V850E support. - * - * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4 - * and (theoretically) SH3. I have only tested SH4 in little endian mode. - * - * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and - * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only - * very minor changes required to also work with StrongArm and presumably - * all ARM based systems. - * - * Yoshinori Sato <ysato@users.sourceforge.jp> 19-May-2004. - * added Renesas H8/300 support. - * - * Paul Mundt <lethal@linux-sh.org> 08-Aug-2003. - * Integrated support for sh64 (SH-5), from preliminary modutils - * patches from Benedict Gaster <benedict.gaster@superh.com>. - * Currently limited to support for 32bit ABI. - * - * Magnus Damm <damm@opensource.se> 22-May-2002. - * The plt and got code are now using the same structs. - * Added generic linked list code to fully support PowerPC. - * Replaced the mess in arch_apply_relocation() with architecture blocks. - * The arch_create_got() function got cleaned up with architecture blocks. - * These blocks should be easy maintain and sync with obj_xxx.c in modutils. - * - * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001. - * PowerPC specific code stolen from modutils-2.3.16, - * written by Paul Mackerras, Copyright 1996, 1997 Linux International. - * I've only tested the code on mpc8xx platforms in big-endian mode. - * Did some cleanup and added USE_xxx_ENTRIES... - * - * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001. - * based on modutils-2.4.2 - * MIPS specific support for Elf loading and relocation. - * Copyright 1996, 1997 Linux International. - * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu> - * - * Based almost entirely on the Linux modutils-2.3.11 implementation. - * Copyright 1996, 1997 Linux International. - * New implementation contributed by Richard Henderson <rth@tamu.edu> - * Based on original work by Bjorn Ekwall <bj0rn@blox.se> - * Restructured (and partly rewritten) by: - * Björn Ekwall <bj0rn@blox.se> February 1999 + * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ #include "libbb.h" -#include <libgen.h> -#include <sys/utsname.h> - -#if !ENABLE_FEATURE_2_4_MODULES && !ENABLE_FEATURE_2_6_MODULES -#undef ENABLE_FEATURE_2_4_MODULES -#define ENABLE_FEATURE_2_4_MODULES 1 -#endif - -/* - * Big piece of 2.4-specific code - */ -#if ENABLE_FEATURE_2_4_MODULES - -#if ENABLE_FEATURE_2_6_MODULES -static int insmod_ng_main(int argc, char **argv); -#endif - -#if ENABLE_FEATURE_INSMOD_LOADINKMEM -#define LOADBITS 0 -#else -#define LOADBITS 1 -#endif - -/* Alpha */ -#if defined(__alpha__) -#define MATCH_MACHINE(x) (x == EM_ALPHA) -#define SHT_RELM SHT_RELA -#define Elf64_RelM Elf64_Rela -#define ELFCLASSM ELFCLASS64 -#endif - -/* ARM support */ -#if defined(__arm__) -#define MATCH_MACHINE(x) (x == EM_ARM) -#define SHT_RELM SHT_REL -#define Elf32_RelM Elf32_Rel -#define ELFCLASSM ELFCLASS32 -#define USE_PLT_ENTRIES -#define PLT_ENTRY_SIZE 8 -#define USE_GOT_ENTRIES -#define GOT_ENTRY_SIZE 8 -#define USE_SINGLE -#endif - -/* blackfin */ -#if defined(BFIN) -#define MATCH_MACHINE(x) (x == EM_BLACKFIN) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#endif - -/* CRIS */ -#if defined(__cris__) -#define MATCH_MACHINE(x) (x == EM_CRIS) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#ifndef EM_CRIS -#define EM_CRIS 76 -#define R_CRIS_NONE 0 -#define R_CRIS_32 3 -#endif -#endif - -/* H8/300 */ -#if defined(__H8300H__) || defined(__H8300S__) -#define MATCH_MACHINE(x) (x == EM_H8_300) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#define USE_SINGLE -#define SYMBOL_PREFIX "_" -#endif - -/* PA-RISC / HP-PA */ -#if defined(__hppa__) -#define MATCH_MACHINE(x) (x == EM_PARISC) -#define SHT_RELM SHT_RELA -#if defined(__LP64__) -#define Elf64_RelM Elf64_Rela -#define ELFCLASSM ELFCLASS64 -#else -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#endif -#endif - -/* x86 */ -#if defined(__i386__) -#ifndef EM_486 -#define MATCH_MACHINE(x) (x == EM_386) -#else -#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486) -#endif -#define SHT_RELM SHT_REL -#define Elf32_RelM Elf32_Rel -#define ELFCLASSM ELFCLASS32 -#define USE_GOT_ENTRIES -#define GOT_ENTRY_SIZE 4 -#define USE_SINGLE -#endif - -/* IA64, aka Itanium */ -#if defined(__ia64__) -#define MATCH_MACHINE(x) (x == EM_IA_64) -#define SHT_RELM SHT_RELA -#define Elf64_RelM Elf64_Rela -#define ELFCLASSM ELFCLASS64 -#endif - -/* m68k */ -#if defined(__mc68000__) -#define MATCH_MACHINE(x) (x == EM_68K) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#define USE_GOT_ENTRIES -#define GOT_ENTRY_SIZE 4 -#define USE_SINGLE -#endif - -/* Microblaze */ -#if defined(__microblaze__) -#define USE_SINGLE -#include <linux/elf-em.h> -#define MATCH_MACHINE(x) (x == EM_XILINX_MICROBLAZE) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#endif - -/* MIPS */ -#if defined(__mips__) -#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE) -#define SHT_RELM SHT_REL -#define Elf32_RelM Elf32_Rel -#define ELFCLASSM ELFCLASS32 -/* Account for ELF spec changes. */ -#ifndef EM_MIPS_RS3_LE -#ifdef EM_MIPS_RS4_BE -#define EM_MIPS_RS3_LE EM_MIPS_RS4_BE -#else -#define EM_MIPS_RS3_LE 10 -#endif -#endif /* !EM_MIPS_RS3_LE */ -#define ARCHDATAM "__dbe_table" -#endif - -/* Nios II */ -#if defined(__nios2__) -#define MATCH_MACHINE(x) (x == EM_ALTERA_NIOS2) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#endif - -/* PowerPC */ -#if defined(__powerpc64__) -#define MATCH_MACHINE(x) (x == EM_PPC64) -#define SHT_RELM SHT_RELA -#define Elf64_RelM Elf64_Rela -#define ELFCLASSM ELFCLASS64 -#elif defined(__powerpc__) -#define MATCH_MACHINE(x) (x == EM_PPC) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#define USE_PLT_ENTRIES -#define PLT_ENTRY_SIZE 16 -#define USE_PLT_LIST -#define LIST_ARCHTYPE ElfW(Addr) -#define USE_LIST -#define ARCHDATAM "__ftr_fixup" -#endif - -/* S390 */ -#if defined(__s390__) -#define MATCH_MACHINE(x) (x == EM_S390) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#define USE_PLT_ENTRIES -#define PLT_ENTRY_SIZE 8 -#define USE_GOT_ENTRIES -#define GOT_ENTRY_SIZE 8 -#define USE_SINGLE -#endif - -/* SuperH */ -#if defined(__sh__) -#define MATCH_MACHINE(x) (x == EM_SH) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#define USE_GOT_ENTRIES -#define GOT_ENTRY_SIZE 4 -#define USE_SINGLE -#endif - -/* Sparc */ -#if defined(__sparc__) -#define MATCH_MACHINE(x) (x == EM_SPARC) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#endif - -/* v850e */ -#if defined(__v850e__) -#define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#define USE_PLT_ENTRIES -#define PLT_ENTRY_SIZE 8 -#define USE_SINGLE -#ifndef EM_CYGNUS_V850 /* grumble */ -#define EM_CYGNUS_V850 0x9080 -#endif -#define SYMBOL_PREFIX "_" -#endif - -/* X86_64 */ -#if defined(__x86_64__) -#define MATCH_MACHINE(x) (x == EM_X86_64) -#define SHT_RELM SHT_RELA -#define USE_GOT_ENTRIES -#define GOT_ENTRY_SIZE 8 -#define USE_SINGLE -#define Elf64_RelM Elf64_Rela -#define ELFCLASSM ELFCLASS64 -#endif - -#ifndef SHT_RELM -#error Sorry, but insmod.c does not yet support this architecture... -#endif - - -//---------------------------------------------------------------------------- -//--------modutils module.h, lines 45-242 -//---------------------------------------------------------------------------- - -/* Definitions for the Linux module syscall interface. - Copyright 1996, 1997 Linux International. - - Contributed by Richard Henderson <rth@tamu.edu> - - This file is part of the Linux modutils. - - This program is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by the - Free Software Foundation; either version 2 of the License, or (at your - option) any later version. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - - -#ifndef MODUTILS_MODULE_H - -/*======================================================================*/ -/* For sizeof() which are related to the module platform and not to the - environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */ - -#define tgt_sizeof_char sizeof(char) -#define tgt_sizeof_short sizeof(short) -#define tgt_sizeof_int sizeof(int) -#define tgt_sizeof_long sizeof(long) -#define tgt_sizeof_char_p sizeof(char *) -#define tgt_sizeof_void_p sizeof(void *) -#define tgt_long long - -#if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64) -#undef tgt_sizeof_long -#undef tgt_sizeof_char_p -#undef tgt_sizeof_void_p -#undef tgt_long -enum { - tgt_sizeof_long = 8, - tgt_sizeof_char_p = 8, - tgt_sizeof_void_p = 8 -}; -#define tgt_long long long -#endif - -/*======================================================================*/ -/* The structures used in Linux 2.1. */ - -/* Note: new_module_symbol does not use tgt_long intentionally */ -struct new_module_symbol { - unsigned long value; - unsigned long name; -}; - -struct new_module_persist; - -struct new_module_ref { - unsigned tgt_long dep; /* kernel addresses */ - unsigned tgt_long ref; - unsigned tgt_long next_ref; -}; - -struct new_module { - unsigned tgt_long size_of_struct; /* == sizeof(module) */ - unsigned tgt_long next; - unsigned tgt_long name; - unsigned tgt_long size; - - tgt_long usecount; - unsigned tgt_long flags; /* AUTOCLEAN et al */ - - unsigned nsyms; - unsigned ndeps; - - unsigned tgt_long syms; - unsigned tgt_long deps; - unsigned tgt_long refs; - unsigned tgt_long init; - unsigned tgt_long cleanup; - unsigned tgt_long ex_table_start; - unsigned tgt_long ex_table_end; -#ifdef __alpha__ - unsigned tgt_long gp; -#endif - /* Everything after here is extension. */ - unsigned tgt_long persist_start; - unsigned tgt_long persist_end; - unsigned tgt_long can_unload; - unsigned tgt_long runsize; - const char *kallsyms_start; /* All symbols for kernel debugging */ - const char *kallsyms_end; - const char *archdata_start; /* arch specific data for module */ - const char *archdata_end; - const char *kernel_data; /* Reserved for kernel internal use */ -}; - -#ifdef ARCHDATAM -#define ARCHDATA_SEC_NAME ARCHDATAM -#else -#define ARCHDATA_SEC_NAME "__archdata" -#endif -#define KALLSYMS_SEC_NAME "__kallsyms" - - -struct new_module_info { - unsigned long addr; - unsigned long size; - unsigned long flags; - long usecount; -}; - -/* Bits of module.flags. */ -enum { - NEW_MOD_RUNNING = 1, - NEW_MOD_DELETED = 2, - NEW_MOD_AUTOCLEAN = 4, - NEW_MOD_VISITED = 8, - NEW_MOD_USED_ONCE = 16 -}; - -int init_module(const char *name, const struct new_module *); -int query_module(const char *name, int which, void *buf, - size_t bufsize, size_t *ret); - -/* Values for query_module's which. */ -enum { - QM_MODULES = 1, - QM_DEPS = 2, - QM_REFS = 3, - QM_SYMBOLS = 4, - QM_INFO = 5 -}; - -/*======================================================================*/ -/* The system calls unchanged between 2.0 and 2.1. */ - -unsigned long create_module(const char *, size_t); -int delete_module(const char *module, unsigned int flags); - - -#endif /* module.h */ - -//---------------------------------------------------------------------------- -//--------end of modutils module.h -//---------------------------------------------------------------------------- - - - -//---------------------------------------------------------------------------- -//--------modutils obj.h, lines 253-462 -//---------------------------------------------------------------------------- - -/* Elf object file loading and relocation routines. - Copyright 1996, 1997 Linux International. - - Contributed by Richard Henderson <rth@tamu.edu> - - This file is part of the Linux modutils. - - This program is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by the - Free Software Foundation; either version 2 of the License, or (at your - option) any later version. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - - -#ifndef MODUTILS_OBJ_H - -/* The relocatable object is manipulated using elfin types. */ - -#include <elf.h> -#include <endian.h> - -#ifndef ElfW -# if ELFCLASSM == ELFCLASS32 -# define ElfW(x) Elf32_ ## x -# define ELFW(x) ELF32_ ## x -# else -# define ElfW(x) Elf64_ ## x -# define ELFW(x) ELF64_ ## x -# endif -#endif - -/* For some reason this is missing from some ancient C libraries.... */ -#ifndef ELF32_ST_INFO -# define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) -#endif - -#ifndef ELF64_ST_INFO -# define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) -#endif - -#define ELF_ST_BIND(info) ELFW(ST_BIND)(info) -#define ELF_ST_TYPE(info) ELFW(ST_TYPE)(info) -#define ELF_ST_INFO(bind, type) ELFW(ST_INFO)(bind, type) -#define ELF_R_TYPE(val) ELFW(R_TYPE)(val) -#define ELF_R_SYM(val) ELFW(R_SYM)(val) - -struct obj_string_patch; -struct obj_symbol_patch; - -struct obj_section -{ - ElfW(Shdr) header; - const char *name; - char *contents; - struct obj_section *load_next; - int idx; -}; - -struct obj_symbol -{ - struct obj_symbol *next; /* hash table link */ - const char *name; - unsigned long value; - unsigned long size; - int secidx; /* the defining section index/module */ - int info; - int ksymidx; /* for export to the kernel symtab */ - int referenced; /* actually used in the link */ -}; - -/* Hardcode the hash table size. We shouldn't be needing so many - symbols that we begin to degrade performance, and we get a big win - by giving the compiler a constant divisor. */ - -#define HASH_BUCKETS 521 - -struct obj_file { - ElfW(Ehdr) header; - ElfW(Addr) baseaddr; - struct obj_section **sections; - struct obj_section *load_order; - struct obj_section **load_order_search_start; - struct obj_string_patch *string_patches; - struct obj_symbol_patch *symbol_patches; - int (*symbol_cmp)(const char *, const char *); - unsigned long (*symbol_hash)(const char *); - unsigned long local_symtab_size; - struct obj_symbol **local_symtab; - struct obj_symbol *symtab[HASH_BUCKETS]; -}; - -enum obj_reloc { - obj_reloc_ok, - obj_reloc_overflow, - obj_reloc_dangerous, - obj_reloc_unhandled -}; - -struct obj_string_patch { - struct obj_string_patch *next; - int reloc_secidx; - ElfW(Addr) reloc_offset; - ElfW(Addr) string_offset; -}; - -struct obj_symbol_patch { - struct obj_symbol_patch *next; - int reloc_secidx; - ElfW(Addr) reloc_offset; - struct obj_symbol *sym; -}; - - -/* Generic object manipulation routines. */ - -static unsigned long obj_elf_hash(const char *); - -static unsigned long obj_elf_hash_n(const char *, unsigned long len); - -static struct obj_symbol *obj_find_symbol(struct obj_file *f, - const char *name); - -static ElfW(Addr) obj_symbol_final_value(struct obj_file *f, - struct obj_symbol *sym); - -#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING -static void obj_set_symbol_compare(struct obj_file *f, - int (*cmp)(const char *, const char *), - unsigned long (*hash)(const char *)); -#endif - -static struct obj_section *obj_find_section(struct obj_file *f, - const char *name); - -static void obj_insert_section_load_order(struct obj_file *f, - struct obj_section *sec); - -static struct obj_section *obj_create_alloced_section(struct obj_file *f, - const char *name, - unsigned long align, - unsigned long size); - -static struct obj_section *obj_create_alloced_section_first(struct obj_file *f, - const char *name, - unsigned long align, - unsigned long size); - -static void *obj_extend_section(struct obj_section *sec, unsigned long more); - -static void obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, - const char *string); - -static void obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, - struct obj_symbol *sym); - -static void obj_check_undefineds(struct obj_file *f); - -static void obj_allocate_commons(struct obj_file *f); - -static unsigned long obj_load_size(struct obj_file *f); - -static int obj_relocate(struct obj_file *f, ElfW(Addr) base); - -static struct obj_file *obj_load(FILE *f, int loadprogbits); - -static int obj_create_image(struct obj_file *f, char *image); - -/* Architecture specific manipulation routines. */ - -static struct obj_file *arch_new_file(void); - -static struct obj_section *arch_new_section(void); - -static struct obj_symbol *arch_new_symbol(void); - -static enum obj_reloc arch_apply_relocation(struct obj_file *f, - struct obj_section *targsec, - /*struct obj_section *symsec,*/ - struct obj_symbol *sym, - ElfW(RelM) *rel, ElfW(Addr) value); - -static void arch_create_got(struct obj_file *f); -#if ENABLE_FEATURE_CHECK_TAINTED_MODULE -static int obj_gpl_license(struct obj_file *f, const char **license); -#endif /* FEATURE_CHECK_TAINTED_MODULE */ -#endif /* obj.h */ -//---------------------------------------------------------------------------- -//--------end of modutils obj.h -//---------------------------------------------------------------------------- - - -/* SPFX is always a string, so it can be concatenated to string constants. */ -#ifdef SYMBOL_PREFIX -#define SPFX SYMBOL_PREFIX -#else -#define SPFX "" -#endif - -enum { STRVERSIONLEN = 64 }; - -/*======================================================================*/ - -#define OPTION_STR "sLo:fkvqx" USE_FEATURE_INSMOD_LOAD_MAP("m") -enum { - OPT_s = 0x1, // -s /* log to syslog */ - /* Not supported but kernel needs this for request_module(), - as this calls: modprobe -k -s -- <module> - so silently ignore this flag */ - OPT_L = 0x2, // -L /* Stub warning */ - /* Compatibility with modprobe. - In theory, this does locking, but we don't do - that. So be careful and plan your life around not - loading the same module 50 times concurrently. */ - OPT_o = 0x4, // -o /* name the output module */ - OPT_f = 0x8, // -f /* force loading */ - OPT_k = 0x10, // -k /* module loaded by kerneld, auto-cleanable */ - OPT_v = 0x20, // -v /* verbose output */ - OPT_q = 0x40, // -q /* silent */ - OPT_x = 0x80, // -x /* do not export externs */ - OPT_m = 0x100, // -m /* print module load map */ -}; -#define flag_force_load (option_mask32 & OPT_f) -#define flag_autoclean (option_mask32 & OPT_k) -#define flag_verbose (option_mask32 & OPT_v) -#define flag_quiet (option_mask32 & OPT_q) -#define flag_noexport (option_mask32 & OPT_x) -#if ENABLE_FEATURE_INSMOD_LOAD_MAP -#define flag_print_load_map (option_mask32 & OPT_m) -#else -#define flag_print_load_map 0 -#endif - -/*======================================================================*/ - -#if defined(USE_LIST) - -struct arch_list_entry -{ - struct arch_list_entry *next; - LIST_ARCHTYPE addend; - int offset; - int inited : 1; -}; - -#endif - -#if defined(USE_SINGLE) - -struct arch_single_entry -{ - int offset; - int inited : 1; - int allocated : 1; -}; - -#endif - -#if defined(__mips__) -struct mips_hi16 -{ - struct mips_hi16 *next; - ElfW(Addr) *addr; - ElfW(Addr) value; -}; -#endif - -struct arch_file { - struct obj_file root; -#if defined(USE_PLT_ENTRIES) - struct obj_section *plt; -#endif -#if defined(USE_GOT_ENTRIES) - struct obj_section *got; -#endif -#if defined(__mips__) - struct mips_hi16 *mips_hi16_list; -#endif -}; - -struct arch_symbol { - struct obj_symbol root; -#if defined(USE_PLT_ENTRIES) -#if defined(USE_PLT_LIST) - struct arch_list_entry *pltent; -#else - struct arch_single_entry pltent; -#endif -#endif -#if defined(USE_GOT_ENTRIES) - struct arch_single_entry gotent; -#endif -}; - - -struct external_module { - const char *name; - ElfW(Addr) addr; - int used; - size_t nsyms; - struct new_module_symbol *syms; -}; - -static struct new_module_symbol *ksyms; -static size_t nksyms; - -static struct external_module *ext_modules; -static int n_ext_modules; -static int n_ext_modules_used; - -static char *m_filename; -static char *m_fullName; - - -/*======================================================================*/ - - -static int FAST_FUNC check_module_name_match(const char *filename, - struct stat *statbuf UNUSED_PARAM, - void *userdata, int depth UNUSED_PARAM) -{ - char *fullname = (char *) userdata; - char *tmp; - - if (fullname[0] == '\0') - return FALSE; - - tmp = bb_get_last_path_component_nostrip(filename); - if (strcmp(tmp, fullname) == 0) { - /* Stop searching if we find a match */ - m_filename = xstrdup(filename); - return FALSE; - } - return TRUE; -} - - -/*======================================================================*/ - -static struct obj_file *arch_new_file(void) -{ - struct arch_file *f; - f = xzalloc(sizeof(*f)); - return &f->root; /* it's a first member */ -} - -static struct obj_section *arch_new_section(void) -{ - return xzalloc(sizeof(struct obj_section)); -} - -static struct obj_symbol *arch_new_symbol(void) -{ - struct arch_symbol *sym; - sym = xzalloc(sizeof(*sym)); - return &sym->root; -} - -static enum obj_reloc -arch_apply_relocation(struct obj_file *f, - struct obj_section *targsec, - /*struct obj_section *symsec,*/ - struct obj_symbol *sym, - ElfW(RelM) *rel, ElfW(Addr) v) -{ -#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \ - || defined(__sh__) || defined(__s390__) || defined(__x86_64__) \ - || defined(__powerpc__) || defined(__mips__) - struct arch_file *ifile = (struct arch_file *) f; -#endif - enum obj_reloc ret = obj_reloc_ok; - ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset); -#if defined(__arm__) || defined(__H8300H__) || defined(__H8300S__) \ - || defined(__i386__) || defined(__mc68000__) || defined(__microblaze__) \ - || defined(__mips__) || defined(__nios2__) || defined(__powerpc__) \ - || defined(__s390__) || defined(__sh__) || defined(__x86_64__) - ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset; -#endif -#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) - struct arch_symbol *isym = (struct arch_symbol *) sym; -#endif -#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \ - || defined(__sh__) || defined(__s390__) -#if defined(USE_GOT_ENTRIES) - ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0; -#endif -#endif -#if defined(USE_PLT_ENTRIES) - ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0; - unsigned long *ip; -# if defined(USE_PLT_LIST) - struct arch_list_entry *pe; -# else - struct arch_single_entry *pe; -# endif -#endif - - switch (ELF_R_TYPE(rel->r_info)) { - -#if defined(__arm__) - - case R_ARM_NONE: - break; - - case R_ARM_ABS32: - *loc += v; - break; - - case R_ARM_GOT32: - goto bb_use_got; - - case R_ARM_GOTPC: - /* relative reloc, always to _GLOBAL_OFFSET_TABLE_ - * (which is .got) similar to branch, - * but is full 32 bits relative */ - - *loc += got - dot; - break; - - case R_ARM_PC24: - case R_ARM_PLT32: - goto bb_use_plt; - - case R_ARM_GOTOFF: /* address relative to the got */ - *loc += v - got; - break; - -#elif defined(__cris__) - - case R_CRIS_NONE: - break; - - case R_CRIS_32: - /* CRIS keeps the relocation value in the r_addend field and - * should not use whats in *loc at all - */ - *loc = v; - break; - -#elif defined(__H8300H__) || defined(__H8300S__) - - case R_H8_DIR24R8: - loc = (ElfW(Addr) *)((ElfW(Addr))loc - 1); - *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v); - break; - case R_H8_DIR24A8: - *loc += v; - break; - case R_H8_DIR32: - case R_H8_DIR32A16: - *loc += v; - break; - case R_H8_PCREL16: - v -= dot + 2; - if ((ElfW(Sword))v > 0x7fff || - (ElfW(Sword))v < -(ElfW(Sword))0x8000) - ret = obj_reloc_overflow; - else - *(unsigned short *)loc = v; - break; - case R_H8_PCREL8: - v -= dot + 1; - if ((ElfW(Sword))v > 0x7f || - (ElfW(Sword))v < -(ElfW(Sword))0x80) - ret = obj_reloc_overflow; - else - *(unsigned char *)loc = v; - break; - -#elif defined(__i386__) - - case R_386_NONE: - break; - - case R_386_32: - *loc += v; - break; - - case R_386_PLT32: - case R_386_PC32: - case R_386_GOTOFF: - *loc += v - dot; - break; - - case R_386_GLOB_DAT: - case R_386_JMP_SLOT: - *loc = v; - break; - - case R_386_RELATIVE: - *loc += f->baseaddr; - break; - - case R_386_GOTPC: - *loc += got - dot; - break; - - case R_386_GOT32: - goto bb_use_got; - break; - -#elif defined(__microblaze__) - case R_MICROBLAZE_NONE: - case R_MICROBLAZE_64_NONE: - case R_MICROBLAZE_32_SYM_OP_SYM: - case R_MICROBLAZE_32_PCREL: - break; - - case R_MICROBLAZE_64_PCREL: { - /* dot is the address of the current instruction. - * v is the target symbol address. - * So we need to extract the offset in the code, - * adding v, then subtrating the current address - * of this instruction. - * Ex: "IMM 0xFFFE bralid 0x0000" = "bralid 0xFFFE0000" - */ - - /* Get split offset stored in code */ - unsigned int temp = (loc[0] & 0xFFFF) << 16 | - (loc[1] & 0xFFFF); - - /* Adjust relative offset. -4 adjustment required - * because dot points to the IMM insn, but branch - * is computed relative to the branch instruction itself. - */ - temp += v - dot - 4; - - /* Store back into code */ - loc[0] = (loc[0] & 0xFFFF0000) | temp >> 16; - loc[1] = (loc[1] & 0xFFFF0000) | (temp & 0xFFFF); - - break; - } - - case R_MICROBLAZE_32: - *loc += v; - break; - - case R_MICROBLAZE_64: { - /* Get split pointer stored in code */ - unsigned int temp1 = (loc[0] & 0xFFFF) << 16 | - (loc[1] & 0xFFFF); - - /* Add reloc offset */ - temp1+=v; - - /* Store back into code */ - loc[0] = (loc[0] & 0xFFFF0000) | temp1 >> 16; - loc[1] = (loc[1] & 0xFFFF0000) | (temp1 & 0xFFFF); - - break; - } - - case R_MICROBLAZE_32_PCREL_LO: - case R_MICROBLAZE_32_LO: - case R_MICROBLAZE_SRO32: - case R_MICROBLAZE_SRW32: - ret = obj_reloc_unhandled; - break; - -#elif defined(__mc68000__) - - case R_68K_NONE: - break; - - case R_68K_32: - *loc += v; - break; - - case R_68K_8: - if (v > 0xff) { - ret = obj_reloc_overflow; - } - *(char *)loc = v; - break; - - case R_68K_16: - if (v > 0xffff) { - ret = obj_reloc_overflow; - } - *(short *)loc = v; - break; - - case R_68K_PC8: - v -= dot; - if ((ElfW(Sword))v > 0x7f - || (ElfW(Sword))v < -(ElfW(Sword))0x80 - ) { - ret = obj_reloc_overflow; - } - *(char *)loc = v; - break; - - case R_68K_PC16: - v -= dot; - if ((ElfW(Sword))v > 0x7fff - || (ElfW(Sword))v < -(ElfW(Sword))0x8000 - ) { - ret = obj_reloc_overflow; - } - *(short *)loc = v; - break; - - case R_68K_PC32: - *(int *)loc = v - dot; - break; - - case R_68K_GLOB_DAT: - case R_68K_JMP_SLOT: - *loc = v; - break; - - case R_68K_RELATIVE: - *(int *)loc += f->baseaddr; - break; - - case R_68K_GOT32: - goto bb_use_got; - -# ifdef R_68K_GOTOFF - case R_68K_GOTOFF: - *loc += v - got; - break; -# endif - -#elif defined(__mips__) - - case R_MIPS_NONE: - break; - - case R_MIPS_32: - *loc += v; - break; - - case R_MIPS_26: - if (v % 4) - ret = obj_reloc_dangerous; - if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000)) - ret = obj_reloc_overflow; - *loc = - (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) & - 0x03ffffff); - break; - - case R_MIPS_HI16: - { - struct mips_hi16 *n; - - /* We cannot relocate this one now because we don't know the value - of the carry we need to add. Save the information, and let LO16 - do the actual relocation. */ - n = xmalloc(sizeof *n); - n->addr = loc; - n->value = v; - n->next = ifile->mips_hi16_list; - ifile->mips_hi16_list = n; - break; - } - - case R_MIPS_LO16: - { - unsigned long insnlo = *loc; - ElfW(Addr) val, vallo; - - /* Sign extend the addend we extract from the lo insn. */ - vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; - - if (ifile->mips_hi16_list != NULL) { - struct mips_hi16 *l; - - l = ifile->mips_hi16_list; - while (l != NULL) { - struct mips_hi16 *next; - unsigned long insn; - - /* Do the HI16 relocation. Note that we actually don't - need to know anything about the LO16 itself, except where - to find the low 16 bits of the addend needed by the LO16. */ - insn = *l->addr; - val = - ((insn & 0xffff) << 16) + - vallo; - val += v; - - /* Account for the sign extension that will happen in the - low bits. */ - val = - ((val >> 16) + - ((val & 0x8000) != - 0)) & 0xffff; - - insn = (insn & ~0xffff) | val; - *l->addr = insn; - - next = l->next; - free(l); - l = next; - } - - ifile->mips_hi16_list = NULL; - } - - /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */ - val = v + vallo; - insnlo = (insnlo & ~0xffff) | (val & 0xffff); - *loc = insnlo; - break; - } - -#elif defined(__nios2__) - - case R_NIOS2_NONE: - break; - - case R_NIOS2_BFD_RELOC_32: - *loc += v; - break; - - case R_NIOS2_BFD_RELOC_16: - if (v > 0xffff) { - ret = obj_reloc_overflow; - } - *(short *)loc = v; - break; - - case R_NIOS2_BFD_RELOC_8: - if (v > 0xff) { - ret = obj_reloc_overflow; - } - *(char *)loc = v; - break; - - case R_NIOS2_S16: - { - Elf32_Addr word; - - if ((Elf32_Sword)v > 0x7fff - || (Elf32_Sword)v < -(Elf32_Sword)0x8000 - ) { - ret = obj_reloc_overflow; - } - - word = *loc; - *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | - (word & 0x3f); - } - break; - - case R_NIOS2_U16: - { - Elf32_Addr word; - - if (v > 0xffff) { - ret = obj_reloc_overflow; - } - - word = *loc; - *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | - (word & 0x3f); - } - break; - - case R_NIOS2_PCREL16: - { - Elf32_Addr word; - - v -= dot + 4; - if ((Elf32_Sword)v > 0x7fff - || (Elf32_Sword)v < -(Elf32_Sword)0x8000 - ) { - ret = obj_reloc_overflow; - } - - word = *loc; - *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f); - } - break; - - case R_NIOS2_GPREL: - { - Elf32_Addr word, gp; - /* get _gp */ - gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp")); - v -= gp; - if ((Elf32_Sword)v > 0x7fff - || (Elf32_Sword)v < -(Elf32_Sword)0x8000 - ) { - ret = obj_reloc_overflow; - } - - word = *loc; - *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f); - } - break; - - case R_NIOS2_CALL26: - if (v & 3) - ret = obj_reloc_dangerous; - if ((v >> 28) != (dot >> 28)) - ret = obj_reloc_overflow; - *loc = (*loc & 0x3f) | ((v >> 2) << 6); - break; - - case R_NIOS2_IMM5: - { - Elf32_Addr word; - - if (v > 0x1f) { - ret = obj_reloc_overflow; - } - - word = *loc & ~0x7c0; - *loc = word | ((v & 0x1f) << 6); - } - break; - - case R_NIOS2_IMM6: - { - Elf32_Addr word; - - if (v > 0x3f) { - ret = obj_reloc_overflow; - } - - word = *loc & ~0xfc0; - *loc = word | ((v & 0x3f) << 6); - } - break; - - case R_NIOS2_IMM8: - { - Elf32_Addr word; - - if (v > 0xff) { - ret = obj_reloc_overflow; - } - - word = *loc & ~0x3fc0; - *loc = word | ((v & 0xff) << 6); - } - break; - - case R_NIOS2_HI16: - { - Elf32_Addr word; - - word = *loc; - *loc = ((((word >> 22) << 16) | ((v >>16) & 0xffff)) << 6) | - (word & 0x3f); - } - break; - - case R_NIOS2_LO16: - { - Elf32_Addr word; - - word = *loc; - *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | - (word & 0x3f); - } - break; - - case R_NIOS2_HIADJ16: - { - Elf32_Addr word1, word2; - - word1 = *loc; - word2 = ((v >> 16) + ((v >> 15) & 1)) & 0xffff; - *loc = ((((word1 >> 22) << 16) | word2) << 6) | - (word1 & 0x3f); - } - break; - -#elif defined(__powerpc64__) - /* PPC64 needs a 2.6 kernel, 2.4 module relocation irrelevant */ - -#elif defined(__powerpc__) - - case R_PPC_ADDR16_HA: - *(unsigned short *)loc = (v + 0x8000) >> 16; - break; - - case R_PPC_ADDR16_HI: - *(unsigned short *)loc = v >> 16; - break; - - case R_PPC_ADDR16_LO: - *(unsigned short *)loc = v; - break; - - case R_PPC_REL24: - goto bb_use_plt; - - case R_PPC_REL32: - *loc = v - dot; - break; - - case R_PPC_ADDR32: - *loc = v; - break; - -#elif defined(__s390__) - - case R_390_32: - *(unsigned int *) loc += v; - break; - case R_390_16: - *(unsigned short *) loc += v; - break; - case R_390_8: - *(unsigned char *) loc += v; - break; - - case R_390_PC32: - *(unsigned int *) loc += v - dot; - break; - case R_390_PC16DBL: - *(unsigned short *) loc += (v - dot) >> 1; - break; - case R_390_PC16: - *(unsigned short *) loc += v - dot; - break; - - case R_390_PLT32: - case R_390_PLT16DBL: - /* find the plt entry and initialize it. */ - pe = (struct arch_single_entry *) &isym->pltent; - if (pe->inited == 0) { - ip = (unsigned long *)(ifile->plt->contents + pe->offset); - ip[0] = 0x0d105810; /* basr 1,0; lg 1,10(1); br 1 */ - ip[1] = 0x100607f1; - if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL) - ip[2] = v - 2; - else - ip[2] = v; - pe->inited = 1; - } - - /* Insert relative distance to target. */ - v = plt + pe->offset - dot; - if (ELF_R_TYPE(rel->r_info) == R_390_PLT32) - *(unsigned int *) loc = (unsigned int) v; - else if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL) - *(unsigned short *) loc = (unsigned short) ((v + 2) >> 1); - break; - - case R_390_GLOB_DAT: - case R_390_JMP_SLOT: - *loc = v; - break; - - case R_390_RELATIVE: - *loc += f->baseaddr; - break; - - case R_390_GOTPC: - *(unsigned long *) loc += got - dot; - break; - - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT32: - if (!isym->gotent.inited) - { - isym->gotent.inited = 1; - *(ElfW(Addr) *)(ifile->got->contents + isym->gotent.offset) = v; - } - if (ELF_R_TYPE(rel->r_info) == R_390_GOT12) - *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff; - else if (ELF_R_TYPE(rel->r_info) == R_390_GOT16) - *(unsigned short *) loc += isym->gotent.offset; - else if (ELF_R_TYPE(rel->r_info) == R_390_GOT32) - *(unsigned int *) loc += isym->gotent.offset; - break; - -# ifndef R_390_GOTOFF32 -# define R_390_GOTOFF32 R_390_GOTOFF -# endif - case R_390_GOTOFF32: - *loc += v - got; - break; - -#elif defined(__sh__) - - case R_SH_NONE: - break; - - case R_SH_DIR32: - *loc += v; - break; - - case R_SH_REL32: - *loc += v - dot; - break; - - case R_SH_PLT32: - *loc = v - dot; - break; - - case R_SH_GLOB_DAT: - case R_SH_JMP_SLOT: - *loc = v; - break; - - case R_SH_RELATIVE: - *loc = f->baseaddr + rel->r_addend; - break; - - case R_SH_GOTPC: - *loc = got - dot + rel->r_addend; - break; - - case R_SH_GOT32: - goto bb_use_got; - - case R_SH_GOTOFF: - *loc = v - got; - break; - -# if defined(__SH5__) - case R_SH_IMM_MEDLOW16: - case R_SH_IMM_LOW16: - { - ElfW(Addr) word; - - if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16) - v >>= 16; - - /* - * movi and shori have the format: - * - * | op | imm | reg | reserved | - * 31..26 25..10 9.. 4 3 .. 0 - * - * so we simply mask and or in imm. - */ - word = *loc & ~0x3fffc00; - word |= (v & 0xffff) << 10; - - *loc = word; - - break; - } - - case R_SH_IMM_MEDLOW16_PCREL: - case R_SH_IMM_LOW16_PCREL: - { - ElfW(Addr) word; - - word = *loc & ~0x3fffc00; - - v -= dot; - - if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16_PCREL) - v >>= 16; - - word |= (v & 0xffff) << 10; - - *loc = word; - - break; - } -# endif /* __SH5__ */ - -#elif defined(__v850e__) - - case R_V850_NONE: - break; - - case R_V850_32: - /* We write two shorts instead of a long because even - 32-bit insns only need half-word alignment, but - 32-bit data needs to be long-word aligned. */ - v += ((unsigned short *)loc)[0]; - v += ((unsigned short *)loc)[1] << 16; - ((unsigned short *)loc)[0] = v & 0xffff; - ((unsigned short *)loc)[1] = (v >> 16) & 0xffff; - break; - - case R_V850_22_PCREL: - goto bb_use_plt; - -#elif defined(__x86_64__) - - case R_X86_64_NONE: - break; - - case R_X86_64_64: - *loc += v; - break; - - case R_X86_64_32: - *(unsigned int *) loc += v; - if (v > 0xffffffff) - { - ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */ - /* error("Possibly is module compiled without -mcmodel=kernel!"); */ - } - break; - - case R_X86_64_32S: - *(signed int *) loc += v; - break; - - case R_X86_64_16: - *(unsigned short *) loc += v; - break; - - case R_X86_64_8: - *(unsigned char *) loc += v; - break; - - case R_X86_64_PC32: - *(unsigned int *) loc += v - dot; - break; - - case R_X86_64_PC16: - *(unsigned short *) loc += v - dot; - break; - - case R_X86_64_PC8: - *(unsigned char *) loc += v - dot; - break; - - case R_X86_64_GLOB_DAT: - case R_X86_64_JUMP_SLOT: - *loc = v; - break; - - case R_X86_64_RELATIVE: - *loc += f->baseaddr; - break; - - case R_X86_64_GOT32: - case R_X86_64_GOTPCREL: - goto bb_use_got; -# if 0 - if (!isym->gotent.reloc_done) - { - isym->gotent.reloc_done = 1; - *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v; - } - /* XXX are these really correct? */ - if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL) - *(unsigned int *) loc += v + isym->gotent.offset; - else - *loc += isym->gotent.offset; - break; -# endif - -#else -# warning "no idea how to handle relocations on your arch" -#endif - - default: - printf("Warning: unhandled reloc %d\n",(int)ELF_R_TYPE(rel->r_info)); - ret = obj_reloc_unhandled; - break; - -#if defined(USE_PLT_ENTRIES) - -bb_use_plt: - - /* find the plt entry and initialize it if necessary */ - -#if defined(USE_PLT_LIST) - for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;) - pe = pe->next; -#else - pe = &isym->pltent; -#endif - - if (! pe->inited) { - ip = (unsigned long *) (ifile->plt->contents + pe->offset); - - /* generate some machine code */ - -#if defined(__arm__) - ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */ - ip[1] = v; /* sym@ */ -#endif -#if defined(__powerpc__) - ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */ - ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */ - ip[2] = 0x7d6903a6; /* mtctr r11 */ - ip[3] = 0x4e800420; /* bctr */ -#endif -#if defined(__v850e__) - /* We have to trash a register, so we assume that any control - transfer more than 21-bits away must be a function call - (so we can use a call-clobbered register). */ - ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */ - ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */ -#endif - pe->inited = 1; - } - - /* relative distance to target */ - v -= dot; - /* if the target is too far away.... */ -#if defined(__arm__) || defined(__powerpc__) - if ((int)v < -0x02000000 || (int)v >= 0x02000000) -#elif defined(__v850e__) - if ((ElfW(Sword))v > 0x1fffff || (ElfW(Sword))v < (ElfW(Sword))-0x200000) -#endif - /* go via the plt */ - v = plt + pe->offset - dot; - -#if defined(__v850e__) - if (v & 1) -#else - if (v & 3) -#endif - ret = obj_reloc_dangerous; - - /* merge the offset into the instruction. */ -#if defined(__arm__) - /* Convert to words. */ - v >>= 2; - - *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff); -#endif -#if defined(__powerpc__) - *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc); -#endif -#if defined(__v850e__) - /* We write two shorts instead of a long because even 32-bit insns - only need half-word alignment, but the 32-bit data write needs - to be long-word aligned. */ - ((unsigned short *)loc)[0] = - (*(unsigned short *)loc & 0xffc0) /* opcode + reg */ - | ((v >> 16) & 0x3f); /* offs high part */ - ((unsigned short *)loc)[1] = - (v & 0xffff); /* offs low part */ -#endif - break; -#endif /* USE_PLT_ENTRIES */ - -#if defined(USE_GOT_ENTRIES) -bb_use_got: - - /* needs an entry in the .got: set it, once */ - if (!isym->gotent.inited) { - isym->gotent.inited = 1; - *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v; - } - /* make the reloc with_respect_to_.got */ -#if defined(__sh__) - *loc += isym->gotent.offset + rel->r_addend; -#elif defined(__i386__) || defined(__arm__) || defined(__mc68000__) - *loc += isym->gotent.offset; -#endif - break; - -#endif /* USE_GOT_ENTRIES */ - } - - return ret; -} - - -#if defined(USE_LIST) - -static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list, - int offset, int size) -{ - struct arch_list_entry *pe; - - for (pe = *list; pe != NULL; pe = pe->next) { - if (pe->addend == rel->r_addend) { - break; - } - } - - if (pe == NULL) { - pe = xmalloc(sizeof(struct arch_list_entry)); - pe->next = *list; - pe->addend = rel->r_addend; - pe->offset = offset; - pe->inited = 0; - *list = pe; - return size; - } - return 0; -} - -#endif - -#if defined(USE_SINGLE) - -static int arch_single_init(/*ElfW(RelM) *rel,*/ struct arch_single_entry *single, - int offset, int size) -{ - if (single->allocated == 0) { - single->allocated = 1; - single->offset = offset; - single->inited = 0; - return size; - } - return 0; -} - -#endif - -#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) - -static struct obj_section *arch_xsect_init(struct obj_file *f, const char *name, - int offset, int size) -{ - struct obj_section *myrelsec = obj_find_section(f, name); - - if (offset == 0) { - offset += size; - } - - if (myrelsec) { - obj_extend_section(myrelsec, offset); - } else { - myrelsec = obj_create_alloced_section(f, name, - size, offset); - } - - return myrelsec; -} - -#endif - -static void arch_create_got(struct obj_file *f) -{ -#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) - struct arch_file *ifile = (struct arch_file *) f; - int i; -#if defined(USE_GOT_ENTRIES) - int got_offset = 0, got_needed = 0, got_allocate; -#endif -#if defined(USE_PLT_ENTRIES) - int plt_offset = 0, plt_needed = 0, plt_allocate; -#endif - struct obj_section *relsec, *symsec, *strsec; - ElfW(RelM) *rel, *relend; - ElfW(Sym) *symtab, *extsym; - const char *strtab, *name; - struct arch_symbol *intsym; - - for (i = 0; i < f->header.e_shnum; ++i) { - relsec = f->sections[i]; - if (relsec->header.sh_type != SHT_RELM) - continue; - - symsec = f->sections[relsec->header.sh_link]; - strsec = f->sections[symsec->header.sh_link]; - - rel = (ElfW(RelM) *) relsec->contents; - relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); - symtab = (ElfW(Sym) *) symsec->contents; - strtab = (const char *) strsec->contents; - - for (; rel < relend; ++rel) { - extsym = &symtab[ELF_R_SYM(rel->r_info)]; - -#if defined(USE_GOT_ENTRIES) - got_allocate = 0; -#endif -#if defined(USE_PLT_ENTRIES) - plt_allocate = 0; -#endif - - switch (ELF_R_TYPE(rel->r_info)) { -#if defined(__arm__) - case R_ARM_PC24: - case R_ARM_PLT32: - plt_allocate = 1; - break; - - case R_ARM_GOTOFF: - case R_ARM_GOTPC: - got_needed = 1; - continue; - - case R_ARM_GOT32: - got_allocate = 1; - break; - -#elif defined(__i386__) - case R_386_GOTPC: - case R_386_GOTOFF: - got_needed = 1; - continue; - - case R_386_GOT32: - got_allocate = 1; - break; - -#elif defined(__powerpc__) - case R_PPC_REL24: - plt_allocate = 1; - break; - -#elif defined(__mc68000__) - case R_68K_GOT32: - got_allocate = 1; - break; - -#ifdef R_68K_GOTOFF - case R_68K_GOTOFF: - got_needed = 1; - continue; -#endif - -#elif defined(__sh__) - case R_SH_GOT32: - got_allocate = 1; - break; - - case R_SH_GOTPC: - case R_SH_GOTOFF: - got_needed = 1; - continue; - -#elif defined(__v850e__) - case R_V850_22_PCREL: - plt_needed = 1; - break; - -#endif - default: - continue; - } - - if (extsym->st_name != 0) { - name = strtab + extsym->st_name; - } else { - name = f->sections[extsym->st_shndx]->name; - } - intsym = (struct arch_symbol *) obj_find_symbol(f, name); -#if defined(USE_GOT_ENTRIES) - if (got_allocate) { - got_offset += arch_single_init( - /*rel,*/ &intsym->gotent, - got_offset, GOT_ENTRY_SIZE); - - got_needed = 1; - } -#endif -#if defined(USE_PLT_ENTRIES) - if (plt_allocate) { -#if defined(USE_PLT_LIST) - plt_offset += arch_list_add( - rel, &intsym->pltent, - plt_offset, PLT_ENTRY_SIZE); -#else - plt_offset += arch_single_init( - /*rel,*/ &intsym->pltent, - plt_offset, PLT_ENTRY_SIZE); -#endif - plt_needed = 1; - } -#endif - } - } - -#if defined(USE_GOT_ENTRIES) - if (got_needed) { - ifile->got = arch_xsect_init(f, ".got", got_offset, - GOT_ENTRY_SIZE); - } -#endif - -#if defined(USE_PLT_ENTRIES) - if (plt_needed) { - ifile->plt = arch_xsect_init(f, ".plt", plt_offset, - PLT_ENTRY_SIZE); - } -#endif - -#endif /* defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) */ -} - -/*======================================================================*/ - -/* Standard ELF hash function. */ -static unsigned long obj_elf_hash_n(const char *name, unsigned long n) -{ - unsigned long h = 0; - unsigned long g; - unsigned char ch; - - while (n > 0) { - ch = *name++; - h = (h << 4) + ch; - g = (h & 0xf0000000); - if (g != 0) { - h ^= g >> 24; - h &= ~g; - } - n--; - } - return h; -} - -static unsigned long obj_elf_hash(const char *name) -{ - return obj_elf_hash_n(name, strlen(name)); -} - -#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING -/* String comparison for non-co-versioned kernel and module. */ - -static int ncv_strcmp(const char *a, const char *b) -{ - size_t alen = strlen(a), blen = strlen(b); - - if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R') - return strncmp(a, b, alen); - else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R') - return strncmp(a, b, blen); - else - return strcmp(a, b); -} - -/* String hashing for non-co-versioned kernel and module. Here - we are simply forced to drop the crc from the hash. */ - -static unsigned long ncv_symbol_hash(const char *str) -{ - size_t len = strlen(str); - if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R') - len -= 10; - return obj_elf_hash_n(str, len); -} - -static void -obj_set_symbol_compare(struct obj_file *f, - int (*cmp) (const char *, const char *), - unsigned long (*hash) (const char *)) -{ - if (cmp) - f->symbol_cmp = cmp; - if (hash) { - struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next; - int i; - - f->symbol_hash = hash; - - memcpy(tmptab, f->symtab, sizeof(tmptab)); - memset(f->symtab, 0, sizeof(f->symtab)); - - for (i = 0; i < HASH_BUCKETS; ++i) - for (sym = tmptab[i]; sym; sym = next) { - unsigned long h = hash(sym->name) % HASH_BUCKETS; - next = sym->next; - sym->next = f->symtab[h]; - f->symtab[h] = sym; - } - } -} - -#endif /* FEATURE_INSMOD_VERSION_CHECKING */ - -static struct obj_symbol * -obj_add_symbol(struct obj_file *f, const char *name, - unsigned long symidx, int info, - int secidx, ElfW(Addr) value, - unsigned long size) -{ - struct obj_symbol *sym; - unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; - int n_type = ELF_ST_TYPE(info); - int n_binding = ELF_ST_BIND(info); - - for (sym = f->symtab[hash]; sym; sym = sym->next) { - if (f->symbol_cmp(sym->name, name) == 0) { - int o_secidx = sym->secidx; - int o_info = sym->info; - int o_type = ELF_ST_TYPE(o_info); - int o_binding = ELF_ST_BIND(o_info); - - /* A redefinition! Is it legal? */ - - if (secidx == SHN_UNDEF) - return sym; - else if (o_secidx == SHN_UNDEF) - goto found; - else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) { - /* Cope with local and global symbols of the same name - in the same object file, as might have been created - by ld -r. The only reason locals are now seen at this - level at all is so that we can do semi-sensible things - with parameters. */ - - struct obj_symbol *nsym, **p; - - nsym = arch_new_symbol(); - nsym->next = sym->next; - nsym->ksymidx = -1; - - /* Excise the old (local) symbol from the hash chain. */ - for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next) - continue; - *p = sym = nsym; - goto found; - } else if (n_binding == STB_LOCAL) { - /* Another symbol of the same name has already been defined. - Just add this to the local table. */ - sym = arch_new_symbol(); - sym->next = NULL; - sym->ksymidx = -1; - f->local_symtab[symidx] = sym; - goto found; - } else if (n_binding == STB_WEAK) - return sym; - else if (o_binding == STB_WEAK) - goto found; - /* Don't unify COMMON symbols with object types the programmer - doesn't expect. */ - else if (secidx == SHN_COMMON - && (o_type == STT_NOTYPE || o_type == STT_OBJECT)) - return sym; - else if (o_secidx == SHN_COMMON - && (n_type == STT_NOTYPE || n_type == STT_OBJECT)) - goto found; - else { - /* Don't report an error if the symbol is coming from - the kernel or some external module. */ - if (secidx <= SHN_HIRESERVE) - bb_error_msg("%s multiply defined", name); - return sym; - } - } - } - - /* Completely new symbol. */ - sym = arch_new_symbol(); - sym->next = f->symtab[hash]; - f->symtab[hash] = sym; - sym->ksymidx = -1; - if (ELF_ST_BIND(info) == STB_LOCAL && symidx != (unsigned long)(-1)) { - if (symidx >= f->local_symtab_size) - bb_error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld", - name, (long) symidx, (long) f->local_symtab_size); - else - f->local_symtab[symidx] = sym; - } - -found: - sym->name = name; - sym->value = value; - sym->size = size; - sym->secidx = secidx; - sym->info = info; - - return sym; -} - -static struct obj_symbol * -obj_find_symbol(struct obj_file *f, const char *name) -{ - struct obj_symbol *sym; - unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; - - for (sym = f->symtab[hash]; sym; sym = sym->next) - if (f->symbol_cmp(sym->name, name) == 0) - return sym; - return NULL; -} - -static ElfW(Addr) obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym) -{ - if (sym) { - if (sym->secidx >= SHN_LORESERVE) - return sym->value; - return sym->value + f->sections[sym->secidx]->header.sh_addr; - } - /* As a special case, a NULL sym has value zero. */ - return 0; -} - -static struct obj_section *obj_find_section(struct obj_file *f, const char *name) -{ - int i, n = f->header.e_shnum; - - for (i = 0; i < n; ++i) - if (strcmp(f->sections[i]->name, name) == 0) - return f->sections[i]; - return NULL; -} - -static int obj_load_order_prio(struct obj_section *a) -{ - unsigned long af, ac; - - af = a->header.sh_flags; - - ac = 0; - if (a->name[0] != '.' || strlen(a->name) != 10 - || strcmp(a->name + 5, ".init") != 0 - ) { - ac |= 32; - } - if (af & SHF_ALLOC) - ac |= 16; - if (!(af & SHF_WRITE)) - ac |= 8; - if (af & SHF_EXECINSTR) - ac |= 4; - if (a->header.sh_type != SHT_NOBITS) - ac |= 2; - - return ac; -} - -static void -obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec) -{ - struct obj_section **p; - int prio = obj_load_order_prio(sec); - for (p = f->load_order_search_start; *p; p = &(*p)->load_next) - if (obj_load_order_prio(*p) < prio) - break; - sec->load_next = *p; - *p = sec; -} - -static struct obj_section *obj_create_alloced_section(struct obj_file *f, - const char *name, - unsigned long align, - unsigned long size) -{ - int newidx = f->header.e_shnum++; - struct obj_section *sec; - - f->sections = xrealloc_vector(f->sections, 2, newidx); - f->sections[newidx] = sec = arch_new_section(); - - sec->header.sh_type = SHT_PROGBITS; - sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; - sec->header.sh_size = size; - sec->header.sh_addralign = align; - sec->name = name; - sec->idx = newidx; - if (size) - sec->contents = xzalloc(size); - - obj_insert_section_load_order(f, sec); - - return sec; -} - -static struct obj_section *obj_create_alloced_section_first(struct obj_file *f, - const char *name, - unsigned long align, - unsigned long size) -{ - int newidx = f->header.e_shnum++; - struct obj_section *sec; - - f->sections = xrealloc_vector(f->sections, 2, newidx); - f->sections[newidx] = sec = arch_new_section(); - - sec->header.sh_type = SHT_PROGBITS; - sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; - sec->header.sh_size = size; - sec->header.sh_addralign = align; - sec->name = name; - sec->idx = newidx; - if (size) - sec->contents = xzalloc(size); - - sec->load_next = f->load_order; - f->load_order = sec; - if (f->load_order_search_start == &f->load_order) - f->load_order_search_start = &sec->load_next; - - return sec; -} - -static void *obj_extend_section(struct obj_section *sec, unsigned long more) -{ - unsigned long oldsize = sec->header.sh_size; - if (more) { - sec->header.sh_size += more; - sec->contents = xrealloc(sec->contents, sec->header.sh_size); - } - return sec->contents + oldsize; -} - - -/* Conditionally add the symbols from the given symbol set to the - new module. */ - -static int -add_symbols_from( struct obj_file *f, - int idx, struct new_module_symbol *syms, size_t nsyms) -{ - struct new_module_symbol *s; - size_t i; - int used = 0; -#ifdef SYMBOL_PREFIX - char *name_buf = 0; - size_t name_alloced_size = 0; -#endif -#if ENABLE_FEATURE_CHECK_TAINTED_MODULE - int gpl; - - gpl = obj_gpl_license(f, NULL) == 0; -#endif - for (i = 0, s = syms; i < nsyms; ++i, ++s) { - /* Only add symbols that are already marked external. - If we override locals we may cause problems for - argument initialization. We will also create a false - dependency on the module. */ - struct obj_symbol *sym; - char *name; - - /* GPL licensed modules can use symbols exported with - * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the - * exported names. Non-GPL modules never see any GPLONLY_ - * symbols so they cannot fudge it by adding the prefix on - * their references. - */ - if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) { -#if ENABLE_FEATURE_CHECK_TAINTED_MODULE - if (gpl) - s->name += 8; - else -#endif - continue; - } - name = (char *)s->name; - -#ifdef SYMBOL_PREFIX - /* Prepend SYMBOL_PREFIX to the symbol's name (the - kernel exports `C names', but module object files - reference `linker names'). */ - size_t extra = sizeof SYMBOL_PREFIX; - size_t name_size = strlen(name) + extra; - if (name_size > name_alloced_size) { - name_alloced_size = name_size * 2; - name_buf = alloca(name_alloced_size); - } - strcpy(name_buf, SYMBOL_PREFIX); - strcpy(name_buf + extra - 1, name); - name = name_buf; -#endif /* SYMBOL_PREFIX */ - - sym = obj_find_symbol(f, name); - if (sym && !(ELF_ST_BIND(sym->info) == STB_LOCAL)) { -#ifdef SYMBOL_PREFIX - /* Put NAME_BUF into more permanent storage. */ - name = xmalloc(name_size); - strcpy(name, name_buf); -#endif - sym = obj_add_symbol(f, name, -1, - ELF_ST_INFO(STB_GLOBAL, - STT_NOTYPE), - idx, s->value, 0); - /* Did our symbol just get installed? If so, mark the - module as "used". */ - if (sym->secidx == idx) - used = 1; - } - } - - return used; -} - -static void add_kernel_symbols(struct obj_file *f) -{ - struct external_module *m; - int i, nused = 0; - - /* Add module symbols first. */ - - for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) { - if (m->nsyms - && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, m->nsyms) - ) { - m->used = 1; - ++nused; - } - } - - n_ext_modules_used = nused; - - /* And finally the symbols from the kernel proper. */ - - if (nksyms) - add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms); -} - -static char *get_modinfo_value(struct obj_file *f, const char *key) -{ - struct obj_section *sec; - char *p, *v, *n, *ep; - size_t klen = strlen(key); - - sec = obj_find_section(f, ".modinfo"); - if (sec == NULL) - return NULL; - p = sec->contents; - ep = p + sec->header.sh_size; - while (p < ep) { - v = strchr(p, '='); - n = strchr(p, '\0'); - if (v) { - if (p + klen == v && strncmp(p, key, klen) == 0) - return v + 1; - } else { - if (p + klen == n && strcmp(p, key) == 0) - return n; - } - p = n + 1; - } - - return NULL; -} - - -/*======================================================================*/ -/* Functions relating to module loading after 2.1.18. */ - -static void -new_process_module_arguments(struct obj_file *f, int argc, char **argv) -{ - while (argc > 0) { - char *p, *q, *key, *sym_name; - struct obj_symbol *sym; - char *contents, *loc; - int min, max, n; - - p = *argv; - q = strchr(p, '='); - if (q == NULL) { - argc--; - continue; - } - - key = alloca(q - p + 6); - memcpy(key, "parm_", 5); - memcpy(key + 5, p, q - p); - key[q - p + 5] = 0; - - p = get_modinfo_value(f, key); - key += 5; - if (p == NULL) { - bb_error_msg_and_die("invalid parameter %s", key); - } - -#ifdef SYMBOL_PREFIX - sym_name = alloca(strlen(key) + sizeof SYMBOL_PREFIX); - strcpy(sym_name, SYMBOL_PREFIX); - strcat(sym_name, key); -#else - sym_name = key; -#endif - sym = obj_find_symbol(f, sym_name); - - /* Also check that the parameter was not resolved from the kernel. */ - if (sym == NULL || sym->secidx > SHN_HIRESERVE) { - bb_error_msg_and_die("symbol for parameter %s not found", key); - } - - if (isdigit(*p)) { - min = strtoul(p, &p, 10); - if (*p == '-') - max = strtoul(p + 1, &p, 10); - else - max = min; - } else - min = max = 1; - - contents = f->sections[sym->secidx]->contents; - loc = contents + sym->value; - n = (*++q != '\0'); - - while (1) { - if ((*p == 's') || (*p == 'c')) { - char *str; - - /* Do C quoting if we begin with a ", else slurp the lot. */ - if (*q == '"') { - char *r; - - str = alloca(strlen(q)); - for (r = str, q++; *q != '"'; ++q, ++r) { - if (*q == '\0') - bb_error_msg_and_die("improperly terminated string argument for %s", - key); - if (*q == '\\') - switch (*++q) { - case 'a': - *r = '\a'; - break; - case 'b': - *r = '\b'; - break; - case 'e': - *r = '\033'; - break; - case 'f': - *r = '\f'; - break; - case 'n': - *r = '\n'; - break; - case 'r': - *r = '\r'; - break; - case 't': - *r = '\t'; - break; - - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - { - int c = *q - '0'; - if (q[1] >= '0' && q[1] <= '7') { - c = (c * 8) + *++q - '0'; - if (q[1] >= '0' && q[1] <= '7') - c = (c * 8) + *++q - '0'; - } - *r = c; - } - break; - - default: - *r = *q; - break; - } - else - *r = *q; - } - *r = '\0'; - ++q; - } else { - char *r; - - /* In this case, the string is not quoted. We will break - it using the coma (like for ints). If the user wants to - include comas in a string, he just has to quote it */ - - /* Search the next coma */ - r = strchr(q, ','); - - /* Found ? */ - if (r != (char *) NULL) { - /* Recopy the current field */ - str = alloca(r - q + 1); - memcpy(str, q, r - q); - - /* I don't know if it is useful, as the previous case - doesn't nul terminate the string ??? */ - str[r - q] = '\0'; - - /* Keep next fields */ - q = r; - } else { - /* last string */ - str = q; - q = (char*)""; - } - } - - if (*p == 's') { - /* Normal string */ - obj_string_patch(f, sym->secidx, loc - contents, str); - loc += tgt_sizeof_char_p; - } else { - /* Array of chars (in fact, matrix!) */ - unsigned long charssize; /* size of each member */ - - /* Get the size of each member */ - /* Probably we should do that outside the loop ? */ - if (!isdigit(*(p + 1))) { - bb_error_msg_and_die("parameter type 'c' for %s must be followed by" - " the maximum size", key); - } - charssize = strtoul(p + 1, (char **) NULL, 10); - - /* Check length */ - if (strlen(str) >= charssize) { - bb_error_msg_and_die("string too long for %s (max %ld)", key, - charssize - 1); - } - - /* Copy to location */ - strcpy((char *) loc, str); - loc += charssize; - } - } else { - long v = strtoul(q, &q, 0); - switch (*p) { - case 'b': - *loc++ = v; - break; - case 'h': - *(short *) loc = v; - loc += tgt_sizeof_short; - break; - case 'i': - *(int *) loc = v; - loc += tgt_sizeof_int; - break; - case 'l': - *(long *) loc = v; - loc += tgt_sizeof_long; - break; - - default: - bb_error_msg_and_die("unknown parameter type '%c' for %s", *p, key); - } - } - retry_end_of_value: - switch (*q) { - case '\0': - goto end_of_arg; - - case ' ': - case '\t': - case '\n': - case '\r': - ++q; - goto retry_end_of_value; - - case ',': - if (++n > max) { - bb_error_msg_and_die("too many values for %s (max %d)", key, max); - } - ++q; - break; - - default: - bb_error_msg_and_die("invalid argument syntax for %s", key); - } - } - end_of_arg: - if (n < min) { - bb_error_msg_and_die("too few values for %s (min %d)", key, min); - } - - argc--; - argv++; - } -} - -#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING -static int new_is_module_checksummed(struct obj_file *f) -{ - const char *p = get_modinfo_value(f, "using_checksums"); - if (p) - return xatoi(p); - return 0; -} - -/* Get the module's kernel version in the canonical integer form. */ - -static int -new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) -{ - char *p, *q; - int a, b, c; - - p = get_modinfo_value(f, "kernel_version"); - if (p == NULL) - return -1; - safe_strncpy(str, p, STRVERSIONLEN); - - a = strtoul(p, &p, 10); - if (*p != '.') - return -1; - b = strtoul(p + 1, &p, 10); - if (*p != '.') - return -1; - c = strtoul(p + 1, &q, 10); - if (p + 1 == q) - return -1; - - return a << 16 | b << 8 | c; -} - -#endif /* FEATURE_INSMOD_VERSION_CHECKING */ - - -/* Fetch the loaded modules, and all currently exported symbols. */ - -static void new_get_kernel_symbols(void) -{ - char *module_names, *mn; - struct external_module *modules, *m; - struct new_module_symbol *syms, *s; - size_t ret, bufsize, nmod, nsyms, i, j; - - /* Collect the loaded modules. */ - - bufsize = 256; - module_names = xmalloc(bufsize); - - retry_modules_load: - if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) { - if (errno == ENOSPC && bufsize < ret) { - bufsize = ret; - module_names = xrealloc(module_names, bufsize); - goto retry_modules_load; - } - bb_perror_msg_and_die("QM_MODULES"); - } - - n_ext_modules = nmod = ret; - - /* Collect the modules' symbols. */ - - if (nmod) { - ext_modules = modules = xzalloc(nmod * sizeof(*modules)); - for (i = 0, mn = module_names, m = modules; - i < nmod; ++i, ++m, mn += strlen(mn) + 1) { - struct new_module_info info; - - if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) { - if (errno == ENOENT) { - /* The module was removed out from underneath us. */ - continue; - } - bb_perror_msg_and_die("query_module: QM_INFO: %s", mn); - } - - bufsize = 1024; - syms = xmalloc(bufsize); - retry_mod_sym_load: - if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) { - switch (errno) { - case ENOSPC: - bufsize = ret; - syms = xrealloc(syms, bufsize); - goto retry_mod_sym_load; - case ENOENT: - /* The module was removed out from underneath us. */ - continue; - default: - bb_perror_msg_and_die("query_module: QM_SYMBOLS: %s", mn); - } - } - nsyms = ret; - - m->name = mn; - m->addr = info.addr; - m->nsyms = nsyms; - m->syms = syms; - - for (j = 0, s = syms; j < nsyms; ++j, ++s) { - s->name += (unsigned long) syms; - } - } - } - - /* Collect the kernel's symbols. */ - - syms = xmalloc(bufsize = 16 * 1024); - retry_kern_sym_load: - if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) { - if (errno == ENOSPC && bufsize < ret) { - bufsize = ret; - syms = xrealloc(syms, bufsize); - goto retry_kern_sym_load; - } - bb_perror_msg_and_die("kernel: QM_SYMBOLS"); - } - nksyms = nsyms = ret; - ksyms = syms; - - for (j = 0, s = syms; j < nsyms; ++j, ++s) { - s->name += (unsigned long) syms; - } -} - - -/* Return the kernel symbol checksum version, or zero if not used. */ - -static int new_is_kernel_checksummed(void) -{ - struct new_module_symbol *s; - size_t i; - - /* Using_Versions is not the first symbol, but it should be in there. */ - - for (i = 0, s = ksyms; i < nksyms; ++i, ++s) - if (strcmp((char *) s->name, "Using_Versions") == 0) - return s->value; - - return 0; -} - - -static void new_create_this_module(struct obj_file *f, const char *m_name) -{ - struct obj_section *sec; - - sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long, - sizeof(struct new_module)); - /* done by obj_create_alloced_section_first: */ - /*memset(sec->contents, 0, sizeof(struct new_module));*/ - - obj_add_symbol(f, SPFX "__this_module", -1, - ELF_ST_INFO(STB_LOCAL, STT_OBJECT), sec->idx, 0, - sizeof(struct new_module)); - - obj_string_patch(f, sec->idx, offsetof(struct new_module, name), - m_name); -} - -#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS -/* add an entry to the __ksymtab section, creating it if necessary */ -static void new_add_ksymtab(struct obj_file *f, struct obj_symbol *sym) -{ - struct obj_section *sec; - ElfW(Addr) ofs; - - /* ensure __ksymtab is allocated, EXPORT_NOSYMBOLS creates a non-alloc section. - * If __ksymtab is defined but not marked alloc, x out the first character - * (no obj_delete routine) and create a new __ksymtab with the correct - * characteristics. - */ - sec = obj_find_section(f, "__ksymtab"); - if (sec && !(sec->header.sh_flags & SHF_ALLOC)) { - *((char *)(sec->name)) = 'x'; /* override const */ - sec = NULL; - } - if (!sec) - sec = obj_create_alloced_section(f, "__ksymtab", - tgt_sizeof_void_p, 0); - if (!sec) - return; - sec->header.sh_flags |= SHF_ALLOC; - /* Empty section might be byte-aligned */ - sec->header.sh_addralign = tgt_sizeof_void_p; - ofs = sec->header.sh_size; - obj_symbol_patch(f, sec->idx, ofs, sym); - obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, sym->name); - obj_extend_section(sec, 2 * tgt_sizeof_char_p); -} -#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ - -static int new_create_module_ksymtab(struct obj_file *f) -{ - struct obj_section *sec; - int i; - - /* We must always add the module references. */ - - if (n_ext_modules_used) { - struct new_module_ref *dep; - struct obj_symbol *tm; - - sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p, - (sizeof(struct new_module_ref) - * n_ext_modules_used)); - if (!sec) - return 0; - - tm = obj_find_symbol(f, SPFX "__this_module"); - dep = (struct new_module_ref *) sec->contents; - for (i = 0; i < n_ext_modules; ++i) - if (ext_modules[i].used) { - dep->dep = ext_modules[i].addr; - obj_symbol_patch(f, sec->idx, - (char *) &dep->ref - sec->contents, tm); - dep->next_ref = 0; - ++dep; - } - } - - if (!flag_noexport && !obj_find_section(f, "__ksymtab")) { - size_t nsyms; - int *loaded; - - sec = obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, 0); - - /* We don't want to export symbols residing in sections that - aren't loaded. There are a number of these created so that - we make sure certain module options don't appear twice. */ - i = f->header.e_shnum; - loaded = alloca(sizeof(int) * i); - while (--i >= 0) - loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0; - - for (nsyms = i = 0; i < HASH_BUCKETS; ++i) { - struct obj_symbol *sym; - for (sym = f->symtab[i]; sym; sym = sym->next) { - if (ELF_ST_BIND(sym->info) != STB_LOCAL - && sym->secidx <= SHN_HIRESERVE - && (sym->secidx >= SHN_LORESERVE - || loaded[sym->secidx]) - ) { - ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p; - - obj_symbol_patch(f, sec->idx, ofs, sym); - obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, - sym->name); - - nsyms++; - } - } - } - - obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p); - } - - return 1; -} - - -static int -new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size) -{ - struct new_module *module; - struct obj_section *sec; - void *image; - int ret; - tgt_long m_addr; - - sec = obj_find_section(f, ".this"); - if (!sec || !sec->contents) { - bb_perror_msg_and_die("corrupt module %s?", m_name); - } - module = (struct new_module *) sec->contents; - m_addr = sec->header.sh_addr; - - module->size_of_struct = sizeof(*module); - module->size = m_size; - module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0; - - sec = obj_find_section(f, "__ksymtab"); - if (sec && sec->header.sh_size) { - module->syms = sec->header.sh_addr; - module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p); - } - - if (n_ext_modules_used) { - sec = obj_find_section(f, ".kmodtab"); - module->deps = sec->header.sh_addr; - module->ndeps = n_ext_modules_used; - } - - module->init = - obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module")); - module->cleanup = - obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module")); - - sec = obj_find_section(f, "__ex_table"); - if (sec) { - module->ex_table_start = sec->header.sh_addr; - module->ex_table_end = sec->header.sh_addr + sec->header.sh_size; - } - - sec = obj_find_section(f, ".text.init"); - if (sec) { - module->runsize = sec->header.sh_addr - m_addr; - } - sec = obj_find_section(f, ".data.init"); - if (sec) { - if (!module->runsize - || module->runsize > sec->header.sh_addr - m_addr - ) { - module->runsize = sec->header.sh_addr - m_addr; - } - } - sec = obj_find_section(f, ARCHDATA_SEC_NAME); - if (sec && sec->header.sh_size) { - module->archdata_start = (void*)sec->header.sh_addr; - module->archdata_end = module->archdata_start + sec->header.sh_size; - } - sec = obj_find_section(f, KALLSYMS_SEC_NAME); - if (sec && sec->header.sh_size) { - module->kallsyms_start = (void*)sec->header.sh_addr; - module->kallsyms_end = module->kallsyms_start + sec->header.sh_size; - } - - /* Whew! All of the initialization is complete. Collect the final - module image and give it to the kernel. */ - - image = xmalloc(m_size); - obj_create_image(f, image); - - ret = init_module(m_name, (struct new_module *) image); - if (ret) - bb_perror_msg("init_module: %s", m_name); - - free(image); - - return ret == 0; -} - - -/*======================================================================*/ - -static void -obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, - const char *string) -{ - struct obj_string_patch *p; - struct obj_section *strsec; - size_t len = strlen(string) + 1; - char *loc; - - p = xmalloc(sizeof(*p)); - p->next = f->string_patches; - p->reloc_secidx = secidx; - p->reloc_offset = offset; - f->string_patches = p; - - strsec = obj_find_section(f, ".kstrtab"); - if (strsec == NULL) { - strsec = obj_create_alloced_section(f, ".kstrtab", 1, len); - p->string_offset = 0; - loc = strsec->contents; - } else { - p->string_offset = strsec->header.sh_size; - loc = obj_extend_section(strsec, len); - } - memcpy(loc, string, len); -} - -static void -obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, - struct obj_symbol *sym) -{ - struct obj_symbol_patch *p; - - p = xmalloc(sizeof(*p)); - p->next = f->symbol_patches; - p->reloc_secidx = secidx; - p->reloc_offset = offset; - p->sym = sym; - f->symbol_patches = p; -} - -static void obj_check_undefineds(struct obj_file *f) -{ - unsigned i; - - for (i = 0; i < HASH_BUCKETS; ++i) { - struct obj_symbol *sym; - for (sym = f->symtab[i]; sym; sym = sym->next) - if (sym->secidx == SHN_UNDEF) { - if (ELF_ST_BIND(sym->info) == STB_WEAK) { - sym->secidx = SHN_ABS; - sym->value = 0; - } else { - if (!flag_quiet) - bb_error_msg_and_die("unresolved symbol %s", sym->name); - } - } - } -} - -static void obj_allocate_commons(struct obj_file *f) -{ - struct common_entry { - struct common_entry *next; - struct obj_symbol *sym; - } *common_head = NULL; - - unsigned long i; - - for (i = 0; i < HASH_BUCKETS; ++i) { - struct obj_symbol *sym; - for (sym = f->symtab[i]; sym; sym = sym->next) - if (sym->secidx == SHN_COMMON) { - /* Collect all COMMON symbols and sort them by size so as to - minimize space wasted by alignment requirements. */ - { - struct common_entry **p, *n; - for (p = &common_head; *p; p = &(*p)->next) - if (sym->size <= (*p)->sym->size) - break; - - n = alloca(sizeof(*n)); - n->next = *p; - n->sym = sym; - *p = n; - } - } - } - - for (i = 1; i < f->local_symtab_size; ++i) { - struct obj_symbol *sym = f->local_symtab[i]; - if (sym && sym->secidx == SHN_COMMON) { - struct common_entry **p, *n; - for (p = &common_head; *p; p = &(*p)->next) - if (sym == (*p)->sym) - break; - else if (sym->size < (*p)->sym->size) { - n = alloca(sizeof(*n)); - n->next = *p; - n->sym = sym; - *p = n; - break; - } - } - } - - if (common_head) { - /* Find the bss section. */ - for (i = 0; i < f->header.e_shnum; ++i) - if (f->sections[i]->header.sh_type == SHT_NOBITS) - break; - - /* If for some reason there hadn't been one, create one. */ - if (i == f->header.e_shnum) { - struct obj_section *sec; - - f->header.e_shnum++; - f->sections = xrealloc_vector(f->sections, 2, i); - f->sections[i] = sec = arch_new_section(); - - sec->header.sh_type = SHT_PROGBITS; - sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; - sec->name = ".bss"; - sec->idx = i; - } - - /* Allocate the COMMONS. */ - { - ElfW(Addr) bss_size = f->sections[i]->header.sh_size; - ElfW(Addr) max_align = f->sections[i]->header.sh_addralign; - struct common_entry *c; - - for (c = common_head; c; c = c->next) { - ElfW(Addr) align = c->sym->value; - - if (align > max_align) - max_align = align; - if (bss_size & (align - 1)) - bss_size = (bss_size | (align - 1)) + 1; - - c->sym->secidx = i; - c->sym->value = bss_size; - - bss_size += c->sym->size; - } - - f->sections[i]->header.sh_size = bss_size; - f->sections[i]->header.sh_addralign = max_align; - } - } - - /* For the sake of patch relocation and parameter initialization, - allocate zeroed data for NOBITS sections now. Note that after - this we cannot assume NOBITS are really empty. */ - for (i = 0; i < f->header.e_shnum; ++i) { - struct obj_section *s = f->sections[i]; - if (s->header.sh_type == SHT_NOBITS) { - s->contents = NULL; - if (s->header.sh_size != 0) - s->contents = xzalloc(s->header.sh_size), - s->header.sh_type = SHT_PROGBITS; - } - } -} - -static unsigned long obj_load_size(struct obj_file *f) -{ - unsigned long dot = 0; - struct obj_section *sec; - - /* Finalize the positions of the sections relative to one another. */ - - for (sec = f->load_order; sec; sec = sec->load_next) { - ElfW(Addr) align; - - align = sec->header.sh_addralign; - if (align && (dot & (align - 1))) - dot = (dot | (align - 1)) + 1; - - sec->header.sh_addr = dot; - dot += sec->header.sh_size; - } - - return dot; -} - -static int obj_relocate(struct obj_file *f, ElfW(Addr) base) -{ - int i, n = f->header.e_shnum; - int ret = 1; - - /* Finalize the addresses of the sections. */ - - f->baseaddr = base; - for (i = 0; i < n; ++i) - f->sections[i]->header.sh_addr += base; - - /* And iterate over all of the relocations. */ - - for (i = 0; i < n; ++i) { - struct obj_section *relsec, *symsec, *targsec, *strsec; - ElfW(RelM) * rel, *relend; - ElfW(Sym) * symtab; - const char *strtab; - - relsec = f->sections[i]; - if (relsec->header.sh_type != SHT_RELM) - continue; - - symsec = f->sections[relsec->header.sh_link]; - targsec = f->sections[relsec->header.sh_info]; - strsec = f->sections[symsec->header.sh_link]; - - rel = (ElfW(RelM) *) relsec->contents; - relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); - symtab = (ElfW(Sym) *) symsec->contents; - strtab = (const char *) strsec->contents; - - for (; rel < relend; ++rel) { - ElfW(Addr) value = 0; - struct obj_symbol *intsym = NULL; - unsigned long symndx; - ElfW(Sym) * extsym = 0; - const char *errmsg; - - /* Attempt to find a value to use for this relocation. */ - - symndx = ELF_R_SYM(rel->r_info); - if (symndx) { - /* Note we've already checked for undefined symbols. */ - - extsym = &symtab[symndx]; - if (ELF_ST_BIND(extsym->st_info) == STB_LOCAL) { - /* Local symbols we look up in the local table to be sure - we get the one that is really intended. */ - intsym = f->local_symtab[symndx]; - } else { - /* Others we look up in the hash table. */ - const char *name; - if (extsym->st_name) - name = strtab + extsym->st_name; - else - name = f->sections[extsym->st_shndx]->name; - intsym = obj_find_symbol(f, name); - } - - value = obj_symbol_final_value(f, intsym); - intsym->referenced = 1; - } -#if SHT_RELM == SHT_RELA -#if defined(__alpha__) && defined(AXP_BROKEN_GAS) - /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */ - if (!extsym || !extsym->st_name - || ELF_ST_BIND(extsym->st_info) != STB_LOCAL) -#endif - value += rel->r_addend; -#endif - - /* Do it! */ - switch (arch_apply_relocation - (f, targsec, /*symsec,*/ intsym, rel, value) - ) { - case obj_reloc_ok: - break; - - case obj_reloc_overflow: - errmsg = "Relocation overflow"; - goto bad_reloc; - case obj_reloc_dangerous: - errmsg = "Dangerous relocation"; - goto bad_reloc; - case obj_reloc_unhandled: - errmsg = "Unhandled relocation"; -bad_reloc: - if (extsym) { - bb_error_msg("%s of type %ld for %s", errmsg, - (long) ELF_R_TYPE(rel->r_info), - strtab + extsym->st_name); - } else { - bb_error_msg("%s of type %ld", errmsg, - (long) ELF_R_TYPE(rel->r_info)); - } - ret = 0; - break; - } - } - } - - /* Finally, take care of the patches. */ - - if (f->string_patches) { - struct obj_string_patch *p; - struct obj_section *strsec; - ElfW(Addr) strsec_base; - strsec = obj_find_section(f, ".kstrtab"); - strsec_base = strsec->header.sh_addr; - - for (p = f->string_patches; p; p = p->next) { - struct obj_section *targsec = f->sections[p->reloc_secidx]; - *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) - = strsec_base + p->string_offset; - } - } - - if (f->symbol_patches) { - struct obj_symbol_patch *p; - - for (p = f->symbol_patches; p; p = p->next) { - struct obj_section *targsec = f->sections[p->reloc_secidx]; - *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) - = obj_symbol_final_value(f, p->sym); - } - } - - return ret; -} - -static int obj_create_image(struct obj_file *f, char *image) -{ - struct obj_section *sec; - ElfW(Addr) base = f->baseaddr; - - for (sec = f->load_order; sec; sec = sec->load_next) { - char *secimg; - - if (sec->contents == 0 || sec->header.sh_size == 0) - continue; - - secimg = image + (sec->header.sh_addr - base); - - /* Note that we allocated data for NOBITS sections earlier. */ - memcpy(secimg, sec->contents, sec->header.sh_size); - } - - return 1; -} - -/*======================================================================*/ - -static struct obj_file *obj_load(FILE *fp, int loadprogbits UNUSED_PARAM) -{ - struct obj_file *f; - ElfW(Shdr) * section_headers; - size_t shnum, i; - char *shstrtab; - - /* Read the file header. */ - - f = arch_new_file(); - f->symbol_cmp = strcmp; - f->symbol_hash = obj_elf_hash; - f->load_order_search_start = &f->load_order; - - fseek(fp, 0, SEEK_SET); - if (fread(&f->header, sizeof(f->header), 1, fp) != 1) { - bb_perror_msg_and_die("error reading ELF header"); - } - - if (f->header.e_ident[EI_MAG0] != ELFMAG0 - || f->header.e_ident[EI_MAG1] != ELFMAG1 - || f->header.e_ident[EI_MAG2] != ELFMAG2 - || f->header.e_ident[EI_MAG3] != ELFMAG3 - ) { - bb_error_msg_and_die("not an ELF file"); - } - if (f->header.e_ident[EI_CLASS] != ELFCLASSM - || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN ? ELFDATA2MSB : ELFDATA2LSB) - || f->header.e_ident[EI_VERSION] != EV_CURRENT - || !MATCH_MACHINE(f->header.e_machine) - ) { - bb_error_msg_and_die("ELF file not for this architecture"); - } - if (f->header.e_type != ET_REL) { - bb_error_msg_and_die("ELF file not a relocatable object"); - } - - /* Read the section headers. */ - - if (f->header.e_shentsize != sizeof(ElfW(Shdr))) { - bb_error_msg_and_die("section header size mismatch: %lu != %lu", - (unsigned long) f->header.e_shentsize, - (unsigned long) sizeof(ElfW(Shdr))); - } - - shnum = f->header.e_shnum; - /* Growth of ->sections vector will be done by - * xrealloc_vector(..., 2, ...), therefore we must allocate - * at least 2^2 = 4 extra elements here. */ - f->sections = xzalloc(sizeof(f->sections[0]) * (shnum + 4)); - - section_headers = alloca(sizeof(ElfW(Shdr)) * shnum); - fseek(fp, f->header.e_shoff, SEEK_SET); - if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) { - bb_perror_msg_and_die("error reading ELF section headers"); - } - - /* Read the section data. */ - - for (i = 0; i < shnum; ++i) { - struct obj_section *sec; - - f->sections[i] = sec = arch_new_section(); - - sec->header = section_headers[i]; - sec->idx = i; - - if (sec->header.sh_size) { - switch (sec->header.sh_type) { - case SHT_NULL: - case SHT_NOTE: - case SHT_NOBITS: - /* ignore */ - break; - - case SHT_PROGBITS: -#if LOADBITS - if (!loadprogbits) { - sec->contents = NULL; - break; - } -#endif - case SHT_SYMTAB: - case SHT_STRTAB: - case SHT_RELM: - sec->contents = NULL; - if (sec->header.sh_size > 0) { - sec->contents = xzalloc(sec->header.sh_size); - fseek(fp, sec->header.sh_offset, SEEK_SET); - if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) { - bb_perror_msg_and_die("error reading ELF section data"); - } - } - break; - -#if SHT_RELM == SHT_REL - case SHT_RELA: - bb_error_msg_and_die("RELA relocations not supported on this architecture"); -#else - case SHT_REL: - bb_error_msg_and_die("REL relocations not supported on this architecture"); -#endif - default: - if (sec->header.sh_type >= SHT_LOPROC) { - /* Assume processor specific section types are debug - info and can safely be ignored. If this is ever not - the case (Hello MIPS?), don't put ifdefs here but - create an arch_load_proc_section(). */ - break; - } - - bb_error_msg_and_die("can't handle sections of type %ld", - (long) sec->header.sh_type); - } - } - } - - /* Do what sort of interpretation as needed by each section. */ - - shstrtab = f->sections[f->header.e_shstrndx]->contents; - - for (i = 0; i < shnum; ++i) { - struct obj_section *sec = f->sections[i]; - sec->name = shstrtab + sec->header.sh_name; - } - - for (i = 0; i < shnum; ++i) { - struct obj_section *sec = f->sections[i]; - - /* .modinfo should be contents only but gcc has no attribute for that. - * The kernel may have marked .modinfo as ALLOC, ignore this bit. - */ - if (strcmp(sec->name, ".modinfo") == 0) - sec->header.sh_flags &= ~SHF_ALLOC; - - if (sec->header.sh_flags & SHF_ALLOC) - obj_insert_section_load_order(f, sec); - - switch (sec->header.sh_type) { - case SHT_SYMTAB: - { - unsigned long nsym, j; - char *strtab; - ElfW(Sym) * sym; - - if (sec->header.sh_entsize != sizeof(ElfW(Sym))) { - bb_error_msg_and_die("symbol size mismatch: %lu != %lu", - (unsigned long) sec->header.sh_entsize, - (unsigned long) sizeof(ElfW(Sym))); - } - - nsym = sec->header.sh_size / sizeof(ElfW(Sym)); - strtab = f->sections[sec->header.sh_link]->contents; - sym = (ElfW(Sym) *) sec->contents; - - /* Allocate space for a table of local symbols. */ - j = f->local_symtab_size = sec->header.sh_info; - f->local_symtab = xzalloc(j * sizeof(struct obj_symbol *)); - - /* Insert all symbols into the hash table. */ - for (j = 1, ++sym; j < nsym; ++j, ++sym) { - ElfW(Addr) val = sym->st_value; - const char *name; - if (sym->st_name) - name = strtab + sym->st_name; - else if (sym->st_shndx < shnum) - name = f->sections[sym->st_shndx]->name; - else - continue; -#if defined(__SH5__) - /* - * For sh64 it is possible that the target of a branch - * requires a mode switch (32 to 16 and back again). - * - * This is implied by the lsb being set in the target - * address for SHmedia mode and clear for SHcompact. - */ - val |= sym->st_other & 4; -#endif - obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx, - val, sym->st_size); - } - } - break; - - case SHT_RELM: - if (sec->header.sh_entsize != sizeof(ElfW(RelM))) { - bb_error_msg_and_die("relocation entry size mismatch: %lu != %lu", - (unsigned long) sec->header.sh_entsize, - (unsigned long) sizeof(ElfW(RelM))); - } - break; - /* XXX Relocation code from modutils-2.3.19 is not here. - * Why? That's about 20 lines of code from obj/obj_load.c, - * which gets done in a second pass through the sections. - * This BusyBox insmod does similar work in obj_relocate(). */ - } - } - - return f; -} - -#if ENABLE_FEATURE_INSMOD_LOADINKMEM -/* - * load the unloaded sections directly into the memory allocated by - * kernel for the module - */ - -static int obj_load_progbits(FILE *fp, struct obj_file *f, char *imagebase) -{ - ElfW(Addr) base = f->baseaddr; - struct obj_section* sec; - - for (sec = f->load_order; sec; sec = sec->load_next) { - - /* section already loaded? */ - if (sec->contents != NULL) - continue; - - if (sec->header.sh_size == 0) - continue; - - sec->contents = imagebase + (sec->header.sh_addr - base); - fseek(fp, sec->header.sh_offset, SEEK_SET); - if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) { - bb_perror_msg("error reading ELF section data"); - return 0; - } - - } - return 1; -} -#endif - -static void hide_special_symbols(struct obj_file *f) -{ - static const char *const specials[] = { - SPFX "cleanup_module", - SPFX "init_module", - SPFX "kernel_version", - NULL - }; - - struct obj_symbol *sym; - const char *const *p; - - for (p = specials; *p; ++p) { - sym = obj_find_symbol(f, *p); - if (sym != NULL) - sym->info = ELF_ST_INFO(STB_LOCAL, ELF_ST_TYPE(sym->info)); - } -} - - -#if ENABLE_FEATURE_CHECK_TAINTED_MODULE -static int obj_gpl_license(struct obj_file *f, const char **license) -{ - struct obj_section *sec; - /* This list must match *exactly* the list of allowable licenses in - * linux/include/linux/module.h. Checking for leading "GPL" will not - * work, somebody will use "GPL sucks, this is proprietary". - */ - static const char *const gpl_licenses[] = { - "GPL", - "GPL v2", - "GPL and additional rights", - "Dual BSD/GPL", - "Dual MPL/GPL" - }; - - sec = obj_find_section(f, ".modinfo"); - if (sec) { - const char *value, *ptr, *endptr; - ptr = sec->contents; - endptr = ptr + sec->header.sh_size; - while (ptr < endptr) { - value = strchr(ptr, '='); - if (value && strncmp(ptr, "license", value-ptr) == 0) { - unsigned i; - if (license) - *license = value+1; - for (i = 0; i < ARRAY_SIZE(gpl_licenses); ++i) { - if (strcmp(value+1, gpl_licenses[i]) == 0) - return 0; - } - return 2; - } - ptr = strchr(ptr, '\0'); - if (ptr) - ptr++; - else - ptr = endptr; - } - } - return 1; -} - -#define TAINT_FILENAME "/proc/sys/kernel/tainted" -#define TAINT_PROPRIETORY_MODULE (1 << 0) -#define TAINT_FORCED_MODULE (1 << 1) -#define TAINT_UNSAFE_SMP (1 << 2) -#define TAINT_URL "http://www.tux.org/lkml/#export-tainted" - -static void set_tainted(int fd, char *m_name, - int kernel_has_tainted, int taint, const char *text1, const char *text2) -{ - static smallint printed_info; - - char buf[80]; - int oldval; - - if (fd < 0 && !kernel_has_tainted) - return; /* New modutils on old kernel */ - printf("Warning: loading %s will taint the kernel: %s%s\n", - m_name, text1, text2); - if (!printed_info) { - printf(" See %s for information about tainted modules\n", TAINT_URL); - printed_info = 1; - } - if (fd >= 0) { - read(fd, buf, sizeof(buf)-1); - buf[sizeof(buf)-1] = '\0'; - oldval = strtoul(buf, NULL, 10); - sprintf(buf, "%d\n", oldval | taint); - write(fd, buf, strlen(buf)); - } -} - -/* Check if loading this module will taint the kernel. */ -static void check_tainted_module(struct obj_file *f, char *m_name) -{ - static const char tainted_file[] ALIGN1 = TAINT_FILENAME; - - int fd, kernel_has_tainted; - const char *ptr; - - kernel_has_tainted = 1; - fd = open(tainted_file, O_RDWR); - if (fd < 0) { - if (errno == ENOENT) - kernel_has_tainted = 0; - else if (errno == EACCES) - kernel_has_tainted = 1; - else { - perror(tainted_file); - kernel_has_tainted = 0; - } - } - - switch (obj_gpl_license(f, &ptr)) { - case 0: - break; - case 1: - set_tainted(fd, m_name, kernel_has_tainted, TAINT_PROPRIETORY_MODULE, "no license", ""); - break; - case 2: - /* The module has a non-GPL license so we pretend that the - * kernel always has a taint flag to get a warning even on - * kernels without the proc flag. - */ - set_tainted(fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "non-GPL license - ", ptr); - break; - default: - set_tainted(fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "Unexpected return from obj_gpl_license", ""); - break; - } - - if (flag_force_load) - set_tainted(fd, m_name, 1, TAINT_FORCED_MODULE, "forced load", ""); - - if (fd >= 0) - close(fd); -} -#else /* FEATURE_CHECK_TAINTED_MODULE */ -#define check_tainted_module(x, y) do { } while (0); -#endif /* FEATURE_CHECK_TAINTED_MODULE */ - -#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS -/* add module source, timestamp, kernel version and a symbol for the - * start of some sections. this info is used by ksymoops to do better - * debugging. - */ -#if !ENABLE_FEATURE_INSMOD_VERSION_CHECKING -#define get_module_version(f, str) get_module_version(str) -#endif -static int -get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) -{ -#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING - return new_get_module_version(f, str); -#else /* FEATURE_INSMOD_VERSION_CHECKING */ - strncpy(str, "???", sizeof(str)); - return -1; -#endif /* FEATURE_INSMOD_VERSION_CHECKING */ -} - -/* add module source, timestamp, kernel version and a symbol for the - * start of some sections. this info is used by ksymoops to do better - * debugging. - */ -static void -add_ksymoops_symbols(struct obj_file *f, const char *filename, - const char *m_name) -{ - static const char symprefix[] ALIGN1 = "__insmod_"; - static const char section_names[][8] = { - ".text", - ".rodata", - ".data", - ".bss", - ".sbss" - }; - - struct obj_section *sec; - struct obj_symbol *sym; - char *name, *absolute_filename; - char str[STRVERSIONLEN]; - unsigned i; - int l, lm_name, lfilename, use_ksymtab, version; - struct stat statbuf; - - /* WARNING: was using realpath, but replaced by readlink to stop using - * lots of stack. But here it seems to be able to cause problems? */ - absolute_filename = xmalloc_readlink(filename); - if (!absolute_filename) - absolute_filename = xstrdup(filename); - - lm_name = strlen(m_name); - lfilename = strlen(absolute_filename); - - /* add to ksymtab if it already exists or there is no ksymtab and other symbols - * are not to be exported. otherwise leave ksymtab alone for now, the - * "export all symbols" compatibility code will export these symbols later. - */ - use_ksymtab = obj_find_section(f, "__ksymtab") || flag_noexport; - - sec = obj_find_section(f, ".this"); - if (sec) { - /* tag the module header with the object name, last modified - * timestamp and module version. worst case for module version - * is 0xffffff, decimal 16777215. putting all three fields in - * one symbol is less readable but saves kernel space. - */ - l = sizeof(symprefix) + /* "__insmod_" */ - lm_name + /* module name */ - 2 + /* "_O" */ - lfilename + /* object filename */ - 2 + /* "_M" */ - 2 * sizeof(statbuf.st_mtime) + /* mtime in hex */ - 2 + /* "_V" */ - 8 + /* version in dec */ - 1; /* nul */ - name = xmalloc(l); - if (stat(absolute_filename, &statbuf) != 0) - statbuf.st_mtime = 0; - version = get_module_version(f, str); /* -1 if not found */ - snprintf(name, l, "%s%s_O%s_M%0*lX_V%d", - symprefix, m_name, absolute_filename, - (int)(2 * sizeof(statbuf.st_mtime)), statbuf.st_mtime, - version); - sym = obj_add_symbol(f, name, -1, - ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), - sec->idx, sec->header.sh_addr, 0); - if (use_ksymtab) - new_add_ksymtab(f, sym); - } - free(absolute_filename); -#ifdef _NOT_SUPPORTED_ - /* record where the persistent data is going, same address as previous symbol */ - - if (f->persist) { - l = sizeof(symprefix) + /* "__insmod_" */ - lm_name + /* module name */ - 2 + /* "_P" */ - strlen(f->persist) + /* data store */ - 1; /* nul */ - name = xmalloc(l); - snprintf(name, l, "%s%s_P%s", - symprefix, m_name, f->persist); - sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), - sec->idx, sec->header.sh_addr, 0); - if (use_ksymtab) - new_add_ksymtab(f, sym); - } -#endif /* _NOT_SUPPORTED_ */ - /* tag the desired sections if size is non-zero */ - - for (i = 0; i < ARRAY_SIZE(section_names); ++i) { - sec = obj_find_section(f, section_names[i]); - if (sec && sec->header.sh_size) { - l = sizeof(symprefix) + /* "__insmod_" */ - lm_name + /* module name */ - 2 + /* "_S" */ - strlen(sec->name) + /* section name */ - 2 + /* "_L" */ - 8 + /* length in dec */ - 1; /* nul */ - name = xmalloc(l); - snprintf(name, l, "%s%s_S%s_L%ld", - symprefix, m_name, sec->name, - (long)sec->header.sh_size); - sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), - sec->idx, sec->header.sh_addr, 0); - if (use_ksymtab) - new_add_ksymtab(f, sym); - } - } -} -#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ - -#if ENABLE_FEATURE_INSMOD_LOAD_MAP -static void print_load_map(struct obj_file *f) -{ - struct obj_section *sec; -#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL - struct obj_symbol **all, **p; - int i, nsyms, *loaded; - struct obj_symbol *sym; -#endif - /* Report on the section layout. */ - - printf("Sections: Size %-*s Align\n", - (int) (2 * sizeof(void *)), "Address"); - - for (sec = f->load_order; sec; sec = sec->load_next) { - int a; - unsigned long tmp; - - for (a = -1, tmp = sec->header.sh_addralign; tmp; ++a) - tmp >>= 1; - if (a == -1) - a = 0; - - printf("%-15s %08lx %0*lx 2**%d\n", - sec->name, - (long)sec->header.sh_size, - (int) (2 * sizeof(void *)), - (long)sec->header.sh_addr, - a); - } -#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL - /* Quick reference which section indices are loaded. */ - - i = f->header.e_shnum; - loaded = alloca(sizeof(int) * i); - while (--i >= 0) - loaded[i] = ((f->sections[i]->header.sh_flags & SHF_ALLOC) != 0); - - /* Collect the symbols we'll be listing. */ - - for (nsyms = i = 0; i < HASH_BUCKETS; ++i) - for (sym = f->symtab[i]; sym; sym = sym->next) - if (sym->secidx <= SHN_HIRESERVE - && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]) - ) { - ++nsyms; - } - - all = alloca(nsyms * sizeof(struct obj_symbol *)); - - for (i = 0, p = all; i < HASH_BUCKETS; ++i) - for (sym = f->symtab[i]; sym; sym = sym->next) - if (sym->secidx <= SHN_HIRESERVE - && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]) - ) { - *p++ = sym; - } - - /* And list them. */ - printf("\nSymbols:\n"); - for (p = all; p < all + nsyms; ++p) { - char type = '?'; - unsigned long value; - - sym = *p; - if (sym->secidx == SHN_ABS) { - type = 'A'; - value = sym->value; - } else if (sym->secidx == SHN_UNDEF) { - type = 'U'; - value = 0; - } else { - sec = f->sections[sym->secidx]; - - if (sec->header.sh_type == SHT_NOBITS) - type = 'B'; - else if (sec->header.sh_flags & SHF_ALLOC) { - if (sec->header.sh_flags & SHF_EXECINSTR) - type = 'T'; - else if (sec->header.sh_flags & SHF_WRITE) - type = 'D'; - else - type = 'R'; - } - value = sym->value + sec->header.sh_addr; - } - - if (ELF_ST_BIND(sym->info) == STB_LOCAL) - type = tolower(type); - - printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value, - type, sym->name); - } -#endif -} -#else /* !FEATURE_INSMOD_LOAD_MAP */ -void print_load_map(struct obj_file *f); -#endif +#include "modutils.h" int insmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int insmod_main(int argc, char **argv) -{ - char *opt_o, *arg1; - int len; - int k_crcs; - char *tmp, *tmp1; - unsigned long m_size; - ElfW(Addr) m_addr; - struct obj_file *f; - struct stat st; - char *m_name = NULL; - int exit_status = EXIT_FAILURE; - int m_has_modinfo; -#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING - struct utsname uts_info; - char m_strversion[STRVERSIONLEN]; - int m_version, m_crcs; -#endif -#if ENABLE_FEATURE_CLEAN_UP - FILE *fp = NULL; -#else - FILE *fp; -#endif - int k_version = 0; - struct utsname myuname; - - /* Parse any options */ - getopt32(argv, OPTION_STR, &opt_o); - arg1 = argv[optind]; - if (option_mask32 & OPT_o) { // -o /* name the output module */ - free(m_name); - m_name = xstrdup(opt_o); - } - - if (arg1 == NULL) { - bb_show_usage(); - } - - /* Grab the module name */ - tmp1 = xstrdup(arg1); - tmp = basename(tmp1); - len = strlen(tmp); - - if (uname(&myuname) == 0) { - if (myuname.release[0] == '2') { - k_version = myuname.release[2] - '0'; - } - } - -#if ENABLE_FEATURE_2_6_MODULES - if (k_version > 4 && len > 3 && tmp[len - 3] == '.' - && tmp[len - 2] == 'k' && tmp[len - 1] == 'o' - ) { - len -= 3; - tmp[len] = '\0'; - } else -#endif - if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') { - len -= 2; - tmp[len] = '\0'; - } - - -#if ENABLE_FEATURE_2_6_MODULES - if (k_version > 4) - m_fullName = xasprintf("%s.ko", tmp); - else -#endif - m_fullName = xasprintf("%s.o", tmp); - - if (!m_name) { - m_name = tmp; - } else { - free(tmp1); - tmp1 = NULL; /* flag for free(m_name) before exit() */ - } - - /* Get a filedesc for the module. Check that we have a complete path */ - if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode) - || (fp = fopen_for_read(arg1)) == NULL - ) { - /* Hmm. Could not open it. First search under /lib/modules/`uname -r`, - * but do not error out yet if we fail to find it... */ - if (k_version) { /* uname succeedd */ - char *module_dir; - char *tmdn; - - tmdn = concat_path_file(CONFIG_DEFAULT_MODULES_DIR, myuname.release); - /* Jump through hoops in case /lib/modules/`uname -r` - * is a symlink. We do not want recursive_action to - * follow symlinks, but we do want to follow the - * /lib/modules/`uname -r` dir, So resolve it ourselves - * if it is a link... */ - module_dir = xmalloc_readlink(tmdn); - if (!module_dir) - module_dir = xstrdup(tmdn); - recursive_action(module_dir, ACTION_RECURSE, - check_module_name_match, NULL, m_fullName, 0); - free(module_dir); - free(tmdn); - } - - /* Check if we have found anything yet */ - if (!m_filename || ((fp = fopen_for_read(m_filename)) == NULL)) { - int r; - char *module_dir; - - free(m_filename); - m_filename = NULL; - module_dir = xmalloc_readlink(CONFIG_DEFAULT_MODULES_DIR); - if (!module_dir) - module_dir = xstrdup(CONFIG_DEFAULT_MODULES_DIR); - /* No module found under /lib/modules/`uname -r`, this - * time cast the net a bit wider. Search /lib/modules/ */ - r = recursive_action(module_dir, ACTION_RECURSE, - check_module_name_match, NULL, m_fullName, 0); - if (r) - bb_error_msg_and_die("%s: module not found", m_fullName); - free(module_dir); - if (m_filename == NULL - || ((fp = fopen_for_read(m_filename)) == NULL) - ) { - bb_error_msg_and_die("%s: module not found", m_fullName); - } - } - } else - m_filename = xstrdup(arg1); - - if (flag_verbose) - printf("Using %s\n", m_filename); - -#if ENABLE_FEATURE_2_6_MODULES - if (k_version > 4) { - argv[optind] = m_filename; - optind--; - return insmod_ng_main(argc - optind, argv + optind); - } -#endif - - f = obj_load(fp, LOADBITS); - - if (get_modinfo_value(f, "kernel_version") == NULL) - m_has_modinfo = 0; - else - m_has_modinfo = 1; - -#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING - /* Version correspondence? */ - if (!flag_quiet) { - if (uname(&uts_info) < 0) - uts_info.release[0] = '\0'; - if (m_has_modinfo) { - m_version = new_get_module_version(f, m_strversion); - if (m_version == -1) { - bb_error_msg_and_die("cannot find the kernel version the module was " - "compiled for"); - } - } - - if (strncmp(uts_info.release, m_strversion, STRVERSIONLEN) != 0) { - bb_error_msg("%skernel-module version mismatch\n" - "\t%s was compiled for kernel version %s\n" - "\twhile this kernel is version %s", - flag_force_load ? "warning: " : "", - m_filename, m_strversion, uts_info.release); - if (!flag_force_load) - goto out; - } - } - k_crcs = 0; -#endif /* FEATURE_INSMOD_VERSION_CHECKING */ - - if (query_module(NULL, 0, NULL, 0, NULL)) - bb_error_msg_and_die("not configured to support old kernels"); - new_get_kernel_symbols(); - k_crcs = new_is_kernel_checksummed(); - -#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING - m_crcs = 0; - if (m_has_modinfo) - m_crcs = new_is_module_checksummed(f); - - if (m_crcs != k_crcs) - obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash); -#endif /* FEATURE_INSMOD_VERSION_CHECKING */ - - /* Let the module know about the kernel symbols. */ - add_kernel_symbols(f); - - /* Allocate common symbols, symbol tables, and string tables. */ - - new_create_this_module(f, m_name); - obj_check_undefineds(f); - obj_allocate_commons(f); - check_tainted_module(f, m_name); - - /* done with the module name, on to the optional var=value arguments */ - ++optind; - if (optind < argc) { - new_process_module_arguments(f, argc - optind, argv + optind); - } - - arch_create_got(f); - hide_special_symbols(f); - -#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS - add_ksymoops_symbols(f, m_filename, m_name); -#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ - - new_create_module_ksymtab(f); - - /* Find current size of the module */ - m_size = obj_load_size(f); - - m_addr = create_module(m_name, m_size); - if (m_addr == (ElfW(Addr))(-1)) switch (errno) { - case EEXIST: - bb_error_msg_and_die("a module named %s already exists", m_name); - case ENOMEM: - bb_error_msg_and_die("can't allocate kernel memory for module; needed %lu bytes", - m_size); - default: - bb_perror_msg_and_die("create_module: %s", m_name); - } - -#if !LOADBITS - /* - * the PROGBITS section was not loaded by the obj_load - * now we can load them directly into the kernel memory - */ - if (!obj_load_progbits(fp, f, (char*)m_addr)) { - delete_module(m_name, 0); - goto out; - } -#endif - - if (!obj_relocate(f, m_addr)) { - delete_module(m_name, 0); - goto out; - } - - if (!new_init_module(m_name, f, m_size)) { - delete_module(m_name, 0); - goto out; - } - - if (flag_print_load_map) - print_load_map(f); - - exit_status = EXIT_SUCCESS; - - out: -#if ENABLE_FEATURE_CLEAN_UP - if (fp) - fclose(fp); - free(tmp1); - if (!tmp1) - free(m_name); - free(m_filename); -#endif - return exit_status; -} - -#endif /* ENABLE_FEATURE_2_4_MODULES */ -/* - * End of big piece of 2.4-specific code - */ - - -#if ENABLE_FEATURE_2_6_MODULES - -#include <sys/mman.h> - -#if defined __UCLIBC__ && !ENABLE_FEATURE_2_4_MODULES -/* big time suckage. The old prototype above renders our nice fwd-decl wrong */ -extern int init_module(void *module, unsigned long len, const char *options); -#else -#include <asm/unistd.h> -#include <sys/syscall.h> -#define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts) -#endif - -/* We use error numbers in a loose translation... */ -static const char *moderror(int err) -{ - switch (err) { - case ENOEXEC: - return "invalid module format"; - case ENOENT: - return "unknown symbol in module"; - case ESRCH: - return "module has wrong symbol version"; - case EINVAL: - return "invalid parameters"; - default: - return strerror(err); - } -} - -#if !ENABLE_FEATURE_2_4_MODULES -int insmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int insmod_main(int argc UNUSED_PARAM, char **argv) -#else -static int insmod_ng_main(int argc UNUSED_PARAM, char **argv) -#endif { - size_t len; - int optlen; - void *map; - char *filename, *options; + char *filename; + int rc; + + USE_FEATURE_2_4_MODULES( + getopt32(argv, INSMOD_OPTS INSMOD_ARGS); + argv += optind-1; + ); filename = *++argv; if (!filename) bb_show_usage(); - /* Rest is options */ - options = xzalloc(1); - optlen = 0; - while (*++argv) { - options = xrealloc(options, optlen + 2 + strlen(*argv) + 2); - /* Spaces handled by "" pairs, but no way of escaping quotes */ - optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv); - } + rc = bb_init_module(filename, parse_cmdline_module_options(argv)); + if (rc) + bb_error_msg("cannot insert '%s': %s", filename, moderror(rc)); -#if 0 - /* Any special reason why mmap? It isn't performance critical. -vda */ - /* Yes, xmalloc'ing can use *alot* of RAM. Don't forget that there are - * modules out there that are half a megabyte! mmap()ing is way nicer - * for small mem boxes, i guess. */ - /* But after load, these modules will take up that 0.5mb in kernel - * anyway. Using malloc here causes only a transient spike to 1mb, - * after module is loaded, we go back to normal 0.5mb usage - * (in kernel). Also, mmap isn't magic - when we touch mapped data, - * we use memory. -vda */ - int fd; - struct stat st; - unsigned long len; - fd = xopen(filename, O_RDONLY); - fstat(fd, &st); - len = st.st_size; - map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0); - if (map == MAP_FAILED) { - bb_perror_msg_and_die("cannot mmap '%s'", filename); - } - - /* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */ - if (map == NULL) { - map = xmalloc(len); - xread(fd, map, len); - } -#else - len = MAXINT(ssize_t); - map = xmalloc_xopen_read_close(filename, &len); -#endif - - if (init_module(map, len, options) != 0) - bb_error_msg_and_die("cannot insert '%s': %s", - filename, moderror(errno)); - return 0; + return rc; } - -#endif diff --git a/modutils/lsmod.c b/modutils/lsmod.c index 3f237039e..b66563693 100644 --- a/modutils/lsmod.c +++ b/modutils/lsmod.c @@ -3,192 +3,77 @@ * Mini lsmod implementation for busybox * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> - * - * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and - * Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels - * (which lack the query_module() interface). + * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ #include "libbb.h" - -#if !ENABLE_FEATURE_CHECK_TAINTED_MODULE -static void check_tainted(void) { bb_putchar('\n'); } -#else -#define TAINT_FILENAME "/proc/sys/kernel/tainted" -#define TAINT_PROPRIETORY_MODULE (1<<0) -#define TAINT_FORCED_MODULE (1<<1) -#define TAINT_UNSAFE_SMP (1<<2) +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE +enum { + TAINT_PROPRIETORY_MODULE = (1 << 0), + TAINT_FORCED_MODULE = (1 << 1), + TAINT_UNSAFE_SMP = (1 << 2), +}; static void check_tainted(void) { - int tainted; - FILE *f; - - tainted = 0; - f = fopen_for_read(TAINT_FILENAME); - if (f) { - fscanf(f, "%d", &tainted); - fclose(f); + int tainted = 0; + char *buf = xmalloc_open_read_close("/proc/sys/kernel/tainted", NULL); + if (buf) { + tainted = atoi(buf); + if (ENABLE_FEATURE_CLEAN_UP) + free(buf); } + if (tainted) { printf(" Tainted: %c%c%c\n", tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G', tainted & TAINT_FORCED_MODULE ? 'F' : ' ', tainted & TAINT_UNSAFE_SMP ? 'S' : ' '); } else { - printf(" Not tainted\n"); + puts(" Not tainted"); } } +#else +static void check_tainted(void) { putchar('\n'); } #endif -#if ENABLE_FEATURE_QUERY_MODULE_INTERFACE - -struct module_info -{ - unsigned long addr; - unsigned long size; - unsigned long flags; - long usecount; -}; - - -int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret); - -enum { -/* Values for query_module's which. */ - QM_MODULES = 1, - QM_DEPS = 2, - QM_REFS = 3, - QM_SYMBOLS = 4, - QM_INFO = 5, - -/* Bits of module.flags. */ - NEW_MOD_RUNNING = 1, - NEW_MOD_DELETED = 2, - NEW_MOD_AUTOCLEAN = 4, - NEW_MOD_VISITED = 8, - NEW_MOD_USED_ONCE = 16, - NEW_MOD_INITIALIZING = 64 -}; - int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) { - struct module_info info; - char *module_names, *mn, *deps, *dn; - size_t bufsize, depsize, nmod, count, i, j; - - module_names = deps = NULL; - bufsize = depsize = 0; - while (query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) { - if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES"); - module_names = xmalloc(bufsize = nmod); - } - - deps = xmalloc(depsize = 256); - printf("Module\t\t\tSize Used by"); +#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT + char *token[4]; + parser_t *parser = config_open("/proc/modules"); + printf("Module Size Used by"); //vda! check_tainted(); - for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) { - if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) { - if (errno == ENOENT) { - /* The module was removed out from underneath us. */ - continue; - } - /* else choke */ - bb_perror_msg_and_die("module %s: QM_INFO", mn); + if (ENABLE_FEATURE_2_4_MODULES + && get_linux_version_code() < KERNEL_VERSION(2,6,0) + ) { + while (config_read(parser, token, 4, 3, "# \t", PARSE_NORMAL)) { + if (token[3] != NULL && token[3][0] == '[') { + token[3]++; + token[3][strlen(token[3])-1] = '\0'; + } else + token[3] = (char *) ""; + printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]); } - while (query_module(mn, QM_REFS, deps, depsize, &count)) { - if (errno == ENOENT) { - /* The module was removed out from underneath us. */ - continue; - } else if (errno != ENOSPC) - bb_perror_msg_and_die("module %s: QM_REFS", mn); - deps = xrealloc(deps, count); - } - printf("%-20s%8lu%4ld", mn, info.size, info.usecount); - if (info.flags & NEW_MOD_DELETED) - printf(" (deleted)"); - else if (info.flags & NEW_MOD_INITIALIZING) - printf(" (initializing)"); - else if (!(info.flags & NEW_MOD_RUNNING)) - printf(" (uninitialized)"); - else { - if (info.flags & NEW_MOD_AUTOCLEAN) - printf(" (autoclean) "); - if (!(info.flags & NEW_MOD_USED_ONCE)) - printf(" (unused)"); - } - if (count) - printf(" ["); - for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) { - printf("%s%s", dn, (j==count-1)? "":" "); - } - if (count) - bb_putchar(']'); - - bb_putchar('\n'); - } - -#if ENABLE_FEATURE_CLEAN_UP - free(module_names); -#endif - - return 0; -} - -#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */ - -int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) -{ - FILE *file = xfopen_for_read("/proc/modules"); - - printf("Module Size Used by"); - check_tainted(); -#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT - { - char *line; - while ((line = xmalloc_fgets(file)) != NULL) { - char *tok; - - tok = strtok(line, " \t"); - printf("%-19s", tok); - tok = strtok(NULL, " \t\n"); - printf(" %8s", tok); - tok = strtok(NULL, " \t\n"); - /* Null if no module unloading support. */ - if (tok) { - printf(" %s", tok); - tok = strtok(NULL, "\n"); - if (!tok) - tok = (char*)""; - /* New-style has commas, or -. If so, - truncate (other fields might follow). */ - else if (strchr(tok, ',')) { - tok = strtok(tok, "\t "); - /* Strip trailing comma. */ - if (tok[strlen(tok)-1] == ',') - tok[strlen(tok)-1] = '\0'; - } else if (tok[0] == '-' - && (tok[1] == '\0' || isspace(tok[1])) - ) { - tok = (char*)""; - } - printf(" %s", tok); - } - bb_putchar('\n'); - free(line); + } else { + while (config_read(parser, token, 4, 4, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) { + // N.B. token[3] is either '-' (module is not used by others) + // or comma-separated list ended by comma + // so trimming the trailing char is just what we need! + token[3][strlen(token[3])-1] = '\0'; + printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]); } - fclose(file); } + if (ENABLE_FEATURE_CLEAN_UP) + config_close(parser); #else - xprint_and_close_file(file); -#endif /* CONFIG_FEATURE_2_6_MODULES */ + check_tainted(); + xprint_and_close_file(xfopen_for_read("/proc/modules")); +#endif return EXIT_SUCCESS; } - -#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */ diff --git a/modutils/modprobe.c b/modutils/modprobe.c index 412e71d16..20b9a74aa 100644 --- a/modutils/modprobe.c +++ b/modutils/modprobe.c @@ -2,951 +2,284 @@ /* * Modprobe written from scratch for BusyBox * - * Copyright (c) 2002 by Robert Griebl, griebl@gmx.de - * Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au - * Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com - * - * Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr + * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi> + * Copyright (c) 2008 Vladimir Dronnikov * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. -*/ + */ #include "libbb.h" +#include "modutils.h" #include <sys/utsname.h> #include <fnmatch.h> -#define line_buffer bb_common_bufsiz1 - -struct mod_opt_t { /* one-way list of options to pass to a module */ - char * m_opt_val; - struct mod_opt_t * m_next; -}; - -struct dep_t { /* one-way list of dependency rules */ - /* a dependency rule */ - char * m_name; /* the module name*/ - char * m_path; /* the module file path */ - struct mod_opt_t * m_options; /* the module options */ - - unsigned int m_isalias :1; /* the module is an alias */ - unsigned int m_isblacklisted:1; /* the module is blacklisted */ - unsigned int m_reserved :14; /* stuffin' */ - - unsigned int m_depcnt :16; /* the number of dependable module(s) */ - char ** m_deparr; /* the list of dependable module(s) */ - - struct dep_t * m_next; /* the next dependency rule */ +struct modprobe_option { + char *module; + char *option; }; -struct mod_list_t { /* two-way list of modules to process */ - /* a module description */ - const char * m_name; - char * m_path; - struct mod_opt_t * m_options; - - struct mod_list_t * m_prev; - struct mod_list_t * m_next; +struct modprobe_conf { + char probename[MODULE_NAME_LEN]; + llist_t *options; + llist_t *aliases; +#if ENABLE_FEATURE_MODPROBE_BLACKLIST +#define add_to_blacklist(conf, name) llist_add_to(&conf->blacklist, name) +#define check_blacklist(conf, name) (llist_find(conf->blacklist, name) == NULL) + llist_t *blacklist; +#else +#define add_to_blacklist(conf, name) do {} while (0) +#define check_blacklist(conf, name) (1) +#endif }; -struct include_conf_t { - struct dep_t *first; - struct dep_t *current; +#define MODPROBE_OPTS "acdlnrt:VC:" USE_FEATURE_MODPROBE_BLACKLIST("b") +enum { + MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */ + MODPROBE_OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << 1), /* c */ + MODPROBE_OPT_D = (INSMOD_OPT_UNUSED << 2), /* d */ + MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 3), /* l */ + MODPROBE_OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << 4), /* n */ + MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 5), /* r */ + MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << 6), /* t */ + MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << 7), /* V */ + MODPROBE_OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << 8), /* C */ + MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 9) * ENABLE_FEATURE_MODPROBE_BLACKLIST, }; -static struct dep_t *depend; - -#define MAIN_OPT_STR "acdklnqrst:vVC:" -#define INSERT_ALL 1 /* a */ -#define DUMP_CONF_EXIT 2 /* c */ -#define D_OPT_IGNORED 4 /* d */ -#define AUTOCLEAN_FLG 8 /* k */ -#define LIST_ALL 16 /* l */ -#define SHOW_ONLY 32 /* n */ -#define QUIET 64 /* q */ -#define REMOVE_OPT 128 /* r */ -#define DO_SYSLOG 256 /* s */ -#define RESTRICT_DIR 512 /* t */ -#define VERBOSE 1024 /* v */ -#define VERSION_ONLY 2048 /* V */ -#define CONFIG_FILE 4096 /* C */ - -#define autoclean (option_mask32 & AUTOCLEAN_FLG) -#define show_only (option_mask32 & SHOW_ONLY) -#define quiet (option_mask32 & QUIET) -#define remove_opt (option_mask32 & REMOVE_OPT) -#define do_syslog (option_mask32 & DO_SYSLOG) -#define verbose (option_mask32 & VERBOSE) - -static int parse_tag_value(char *buffer, char **ptag, char **pvalue) -{ - char *tag, *value; - - buffer = skip_whitespace(buffer); - tag = value = buffer; - while (!isspace(*value)) { - if (!*value) - return 0; - value++; - } - *value++ = '\0'; - value = skip_whitespace(value); - if (!*value) - return 0; - - *ptag = tag; - *pvalue = value; - - return 1; -} - -/* - * This function appends an option to a list - */ -static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt) -{ - struct mod_opt_t *ol = opt_list; - - if (ol) { - while (ol->m_next) { - ol = ol->m_next; - } - ol->m_next = xzalloc(sizeof(struct mod_opt_t)); - ol = ol->m_next; - } else { - ol = opt_list = xzalloc(sizeof(struct mod_opt_t)); - } - - ol->m_opt_val = xstrdup(opt); - /*ol->m_next = NULL; - done by xzalloc*/ - - return opt_list; -} - -#if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS -/* static char* parse_command_string(char* src, char **dst); - * src: pointer to string containing argument - * dst: pointer to where to store the parsed argument - * return value: the pointer to the first char after the parsed argument, - * NULL if there was no argument parsed (only trailing spaces). - * Note that memory is allocated with xstrdup when a new argument was - * parsed. Don't forget to free it! - */ -#define ARG_EMPTY 0x00 -#define ARG_IN_DQUOTES 0x01 -#define ARG_IN_SQUOTES 0x02 -static char *parse_command_string(char *src, char **dst) -{ - int opt_status = ARG_EMPTY; - char* tmp_str; - - /* Dumb you, I have nothing to do... */ - if (src == NULL) return src; - - /* Skip leading spaces */ - while (*src == ' ') { - src++; - } - /* Is the end of string reached? */ - if (*src == '\0') { - return NULL; - } - /* Reached the start of an argument - * By the way, we duplicate a little too much - * here but what is too much is freed later. */ - *dst = tmp_str = xstrdup(src); - /* Get to the end of that argument */ - while (*tmp_str != '\0' - && (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES))) - ) { - switch (*tmp_str) { - case '\'': - if (opt_status & ARG_IN_DQUOTES) { - /* Already in double quotes, keep current char as is */ - } else { - /* shift left 1 char, until end of string: get rid of the opening/closing quotes */ - memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); - /* mark me: we enter or leave single quotes */ - opt_status ^= ARG_IN_SQUOTES; - /* Back one char, as we need to re-scan the new char there. */ - tmp_str--; - } - break; - case '"': - if (opt_status & ARG_IN_SQUOTES) { - /* Already in single quotes, keep current char as is */ - } else { - /* shift left 1 char, until end of string: get rid of the opening/closing quotes */ - memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); - /* mark me: we enter or leave double quotes */ - opt_status ^= ARG_IN_DQUOTES; - /* Back one char, as we need to re-scan the new char there. */ - tmp_str--; - } - break; - case '\\': - if (opt_status & ARG_IN_SQUOTES) { - /* Between single quotes: keep as is. */ - } else { - switch (*(tmp_str+1)) { - case 'a': - case 'b': - case 't': - case 'n': - case 'v': - case 'f': - case 'r': - case '0': - /* We escaped a special character. For now, keep - * both the back-slash and the following char. */ - tmp_str++; - src++; - break; - default: - /* We escaped a space or a single or double quote, - * or a back-slash, or a non-escapable char. Remove - * the '\' and keep the new current char as is. */ - memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); - break; - } - } - break; - /* Any other char that is special shall appear here. - * Example: $ starts a variable - case '$': - do_variable_expansion(); - break; - * */ - default: - /* any other char is kept as is. */ - break; - } - tmp_str++; /* Go to next char */ - src++; /* Go to next char to find the end of the argument. */ - } - /* End of string, but still no ending quote */ - if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) { - bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src); - } - *tmp_str++ = '\0'; - *dst = xrealloc(*dst, (tmp_str - *dst)); - return src; -} -#else -#define parse_command_string(src, dst) (0) -#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */ - -static int is_conf_command(char *buffer, const char *command) -{ - int len = strlen(command); - return ((strstr(buffer, command) == buffer) && - isspace(buffer[len])); -} - -/* - * This function reads aliases and default module options from a configuration file - * (/etc/modprobe.conf syntax). It supports includes (only files, no directories). - */ +static llist_t *loaded; -static int FAST_FUNC include_conf_file_act(const char *filename, - struct stat *statbuf UNUSED_PARAM, - void *userdata, - int depth UNUSED_PARAM); +static int read_config(struct modprobe_conf *conf, const char *path); -static int FAST_FUNC include_conf_dir_act(const char *filename UNUSED_PARAM, - struct stat *statbuf UNUSED_PARAM, - void *userdata UNUSED_PARAM, - int depth) +static void add_option(llist_t **all_opts, const char *module, const char *opts) { - if (depth > 1) - return SKIP; + struct modprobe_option *o; - return TRUE; + o = xzalloc(sizeof(struct modprobe_option)); + if (module) + o->module = filename2modname(module, NULL); + o->option = xstrdup(opts); + llist_add_to(all_opts, o); } -static int include_conf_recursive(struct include_conf_t *conf, const char *filename) +static int FAST_FUNC config_file_action(const char *filename, + struct stat *statbuf UNUSED_PARAM, + void *userdata, + int depth UNUSED_PARAM) { - return recursive_action(filename, ACTION_RECURSE, - include_conf_file_act, - include_conf_dir_act, - conf, 1); -} - -static int FAST_FUNC include_conf_file_act(const char *filename, - struct stat *statbuf UNUSED_PARAM, - void *userdata, - int depth UNUSED_PARAM) -{ - struct include_conf_t *conf = (struct include_conf_t *) userdata; - struct dep_t **first = &conf->first; - struct dep_t **current = &conf->current; - int continuation_line = 0; - FILE *f; + struct modprobe_conf *conf = (struct modprobe_conf *) userdata; + RESERVE_CONFIG_BUFFER(modname, MODULE_NAME_LEN); + char *tokens[3]; + parser_t *p; + int rc = TRUE; if (bb_basename(filename)[0] == '.') - return TRUE; - - f = fopen_for_read(filename); - if (f == NULL) - return FALSE; - - // alias parsing is not 100% correct (no correct handling of continuation lines within an alias)! - - while (fgets(line_buffer, sizeof(line_buffer), f)) { - int l; + goto error; - *strchrnul(line_buffer, '#') = '\0'; - - l = strlen(line_buffer); - - while (l && isspace(line_buffer[l-1])) { - line_buffer[l-1] = '\0'; - l--; - } - - if (l == 0) { - continuation_line = 0; - continue; - } - - if (continuation_line) - continue; - - if (is_conf_command(line_buffer, "alias")) { - char *alias, *mod; - - if (parse_tag_value(line_buffer + 6, &alias, &mod)) { - /* handle alias as a module dependent on the aliased module */ - if (!*current) { - (*first) = (*current) = xzalloc(sizeof(struct dep_t)); - } else { - (*current)->m_next = xzalloc(sizeof(struct dep_t)); - (*current) = (*current)->m_next; - } - (*current)->m_name = xstrdup(alias); - (*current)->m_isalias = 1; - - if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) { - /*(*current)->m_depcnt = 0; - done by xzalloc */ - /*(*current)->m_deparr = 0;*/ - } else { - (*current)->m_depcnt = 1; - (*current)->m_deparr = xmalloc(sizeof(char *)); - (*current)->m_deparr[0] = xstrdup(mod); - } - /*(*current)->m_next = NULL; - done by xzalloc */ - } - } else if (is_conf_command(line_buffer, "options")) { - char *mod, *opt; - - /* split the line in the module/alias name, and options */ - if (parse_tag_value(line_buffer + 8, &mod, &opt)) { - struct dep_t *dt; - - /* find the corresponding module */ - for (dt = *first; dt; dt = dt->m_next) { - if (strcmp(dt->m_name, mod) == 0) - break; - } - if (dt) { - if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) { - char* new_opt = NULL; - while ((opt = parse_command_string(opt, &new_opt))) { - dt->m_options = append_option(dt->m_options, new_opt); - } - } else { - dt->m_options = append_option(dt->m_options, opt); - } - } - } - } else if (is_conf_command(line_buffer, "include")) { - char *includefile; + p = config_open2(filename, fopen_for_read); + if (p == NULL) { + rc = FALSE; + goto error; + } - includefile = skip_whitespace(line_buffer + 8); - include_conf_recursive(conf, includefile); + while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) { + if (strcmp(tokens[0], "alias") == 0) { + filename2modname(tokens[1], modname); + if (tokens[2] && + fnmatch(modname, conf->probename, 0) == 0) + llist_add_to(&conf->aliases, + filename2modname(tokens[2], NULL)); + } else if (strcmp(tokens[0], "options") == 0) { + if (tokens[2]) + add_option(&conf->options, tokens[1], tokens[2]); + } else if (strcmp(tokens[0], "include") == 0) { + read_config(conf, tokens[1]); } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST && - (is_conf_command(line_buffer, "blacklist"))) { - char *mod; - struct dep_t *dt; - - mod = skip_whitespace(line_buffer + 10); - for (dt = *first; dt; dt = dt->m_next) { - if (strcmp(dt->m_name, mod) == 0) - break; - } - if (dt) - dt->m_isblacklisted = 1; + strcmp(tokens[0], "blacklist") == 0) { + add_to_blacklist(conf, xstrdup(tokens[1])); } - } /* while (fgets(...)) */ - - fclose(f); - return TRUE; -} - -static int include_conf_file(struct include_conf_t *conf, - const char *filename) -{ - return include_conf_file_act(filename, NULL, conf, 0); -} - -static int include_conf_file2(struct include_conf_t *conf, - const char *filename, const char *oldname) -{ - if (include_conf_file(conf, filename) == TRUE) - return TRUE; - return include_conf_file(conf, oldname); -} - -/* - * This function builds a list of dependency rules from /lib/modules/`uname -r`/modules.dep. - * It then fills every modules and aliases with their default options, found by parsing - * modprobe.conf (or modules.conf, or conf.modules). - */ -static struct dep_t *build_dep(void) -{ - FILE *f; - struct utsname un; - struct include_conf_t conf = { NULL, NULL }; - char *filename; - int continuation_line = 0; - int k_version; - - uname(&un); /* never fails */ - - k_version = 0; - if (un.release[0] == '2') { - k_version = un.release[2] - '0'; } - - filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/"CONFIG_DEFAULT_DEPMOD_FILE, un.release); - f = fopen_for_read(filename); + config_close(p); +error: if (ENABLE_FEATURE_CLEAN_UP) - free(filename); - if (f == NULL) { - /* Ok, that didn't work. Fall back to looking in /lib/modules */ - f = fopen_for_read(CONFIG_DEFAULT_MODULES_DIR"/"CONFIG_DEFAULT_DEPMOD_FILE); - if (f == NULL) { - bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE); - } - } - - while (fgets(line_buffer, sizeof(line_buffer), f)) { - int l = strlen(line_buffer); - char *p = NULL; - - while (l > 0 && isspace(line_buffer[l-1])) { - line_buffer[l-1] = '\0'; - l--; - } - - if (l == 0) { - continuation_line = 0; - continue; - } - - /* Is this a new module dep description? */ - if (!continuation_line) { - /* find the dep beginning */ - char *col = strchr(line_buffer, ':'); - char *dot = col; - - if (col) { - /* This line is a dep description */ - const char *mods; - char *modpath; - char *mod; - - /* Find the beginning of the module file name */ - *col = '\0'; - mods = bb_basename(line_buffer); - - /* find the path of the module */ - modpath = strchr(line_buffer, '/'); /* ... and this is the path */ - if (!modpath) - modpath = line_buffer; /* module with no path */ - /* find the end of the module name in the file name */ - if (ENABLE_FEATURE_2_6_MODULES && - (k_version > 4) && (col[-3] == '.') && - (col[-2] == 'k') && (col[-1] == 'o')) - dot = col - 3; - else if ((col[-2] == '.') && (col[-1] == 'o')) - dot = col - 2; - - mod = xstrndup(mods, dot - mods); - - /* enqueue new module */ - if (!conf.current) { - conf.first = conf.current = xzalloc(sizeof(struct dep_t)); - } else { - conf.current->m_next = xzalloc(sizeof(struct dep_t)); - conf.current = conf.current->m_next; - } - conf.current->m_name = mod; - conf.current->m_path = xstrdup(modpath); - /*current->m_options = NULL; - xzalloc did it*/ - /*current->m_isalias = 0;*/ - /*current->m_depcnt = 0;*/ - /*current->m_deparr = 0;*/ - /*current->m_next = 0;*/ - - p = col + 1; - } else - /* this line is not a dep description */ - p = NULL; - } else - /* It's a dep description continuation */ - p = line_buffer; - - /* p points to the first dependable module; if NULL, no dependable module */ - if (p && (p = skip_whitespace(p))[0] != '\0') { - char *end = &line_buffer[l-1]; - const char *deps; - char *dep; - char *next; - int ext = 0; - - while (isblank(*end) || (*end == '\\')) - end--; - - do { - /* search the end of the dependency */ - next = strchr(p, ' '); - if (next) { - *next = '\0'; - next--; - } else - next = end; - - /* find the beginning of the module file name */ - deps = bb_basename(p); - if (deps == p) - deps = skip_whitespace(deps); - - /* find the end of the module name in the file name */ - if (ENABLE_FEATURE_2_6_MODULES - && (k_version > 4) && (next[-2] == '.') - && (next[-1] == 'k') && (next[0] == 'o')) - ext = 3; - else if ((next[-1] == '.') && (next[0] == 'o')) - ext = 2; - - /* Cope with blank lines */ - if ((next - deps - ext + 1) <= 0) - continue; - dep = xstrndup(deps, next - deps - ext + 1); - - /* Add the new dependable module name */ - conf.current->m_deparr = xrealloc_vector(conf.current->m_deparr, 2, conf.current->m_depcnt); - conf.current->m_deparr[conf.current->m_depcnt++] = dep; - - p = next + 2; - } while (next < end); - } - - /* is there other dependable module(s) ? */ - continuation_line = (line_buffer[l-1] == '\\'); - } /* while (fgets(...)) */ - fclose(f); - - /* - * First parse system-specific options and aliases - * as they take precedence over the kernel ones. - * >=2.6: we only care about modprobe.conf - * <=2.4: we care about modules.conf and conf.modules - */ - { - int r = FALSE; - - if (ENABLE_FEATURE_2_6_MODULES) { - if (include_conf_file(&conf, "/etc/modprobe.conf")) - r = TRUE; - if (include_conf_recursive(&conf, "/etc/modprobe.d")) - r = TRUE; - } - if (ENABLE_FEATURE_2_4_MODULES && !r) - include_conf_file2(&conf, - "/etc/modules.conf", - "/etc/conf.modules"); - } - - /* Only 2.6 has a modules.alias file */ - if (ENABLE_FEATURE_2_6_MODULES) { - /* Parse kernel-declared module aliases */ - filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.alias", un.release); - include_conf_file2(&conf, - filename, - CONFIG_DEFAULT_MODULES_DIR"/modules.alias"); - if (ENABLE_FEATURE_CLEAN_UP) - free(filename); - - /* Parse kernel-declared symbol aliases */ - filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.symbols", un.release); - include_conf_file2(&conf, - filename, - CONFIG_DEFAULT_MODULES_DIR"/modules.symbols"); - if (ENABLE_FEATURE_CLEAN_UP) - free(filename); - } - - return conf.first; -} - -/* return 1 = loaded, 0 = not loaded, -1 = can't tell */ -static int already_loaded(const char *name) -{ - FILE *f; - int ret; - - f = fopen_for_read("/proc/modules"); - if (f == NULL) - return -1; - - ret = 0; - while (fgets(line_buffer, sizeof(line_buffer), f)) { - char *p = line_buffer; - const char *n = name; - - while (1) { - char cn = *n; - char cp = *p; - if (cp == ' ' || cp == '\0') { - if (cn == '\0') { - ret = 1; /* match! */ - goto done; - } - break; /* no match on this line, take next one */ - } - if (cn == '-') cn = '_'; - if (cp == '-') cp = '_'; - if (cp != cn) - break; /* no match on this line, take next one */ - n++; - p++; - } - } - done: - fclose(f); - return ret; + RELEASE_CONFIG_BUFFER(modname); + return rc; } -static int mod_process(const struct mod_list_t *list, int do_insert) +static int read_config(struct modprobe_conf *conf, const char *path) { - int rc = 0; - char **argv = NULL; - struct mod_opt_t *opts; - int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */ - int argc; - - while (list) { - argc = 0; - if (ENABLE_FEATURE_CLEAN_UP) - argc_malloc = 0; - /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory - * each time we allocate memory for argv. - * But it is (quite) small amounts of memory that leak each - * time a module is loaded, and it is reclaimed when modprobe - * exits anyway (even when standalone shell? Yes --vda). - * This could become a problem when loading a module with LOTS of - * dependencies, with LOTS of options for each dependencies, with - * very little memory on the target... But in that case, the module - * would not load because there is no more memory, so there's no - * problem. */ - /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */ - argv = xmalloc(6 * sizeof(char*)); - if (do_insert) { - if (already_loaded(list->m_name) != 1) { - argv[argc++] = (char*)"insmod"; - if (ENABLE_FEATURE_2_4_MODULES) { - if (do_syslog) - argv[argc++] = (char*)"-s"; - if (autoclean) - argv[argc++] = (char*)"-k"; - if (quiet) - argv[argc++] = (char*)"-q"; - else if (verbose) /* verbose and quiet are mutually exclusive */ - argv[argc++] = (char*)"-v"; - } - argv[argc++] = list->m_path; - if (ENABLE_FEATURE_CLEAN_UP) - argc_malloc = argc; - opts = list->m_options; - while (opts) { - /* Add one more option */ - argc++; - argv = xrealloc(argv, (argc + 1) * sizeof(char*)); - argv[argc-1] = opts->m_opt_val; - opts = opts->m_next; - } - } - } else { - /* modutils uses short name for removal */ - if (already_loaded(list->m_name) != 0) { - argv[argc++] = (char*)"rmmod"; - if (do_syslog) - argv[argc++] = (char*)"-s"; - argv[argc++] = (char*)list->m_name; - if (ENABLE_FEATURE_CLEAN_UP) - argc_malloc = argc; - } - } - argv[argc] = NULL; - - if (argc) { - if (verbose) { - printf("%s module %s\n", do_insert?"Loading":"Unloading", list->m_name); - } - if (!show_only) { - int rc2 = wait4pid(spawn(argv)); - - if (do_insert) { - rc = rc2; /* only last module matters */ - } else if (!rc2) { - rc = 0; /* success if remove any mod */ - } - } - if (ENABLE_FEATURE_CLEAN_UP) { - /* the last value in the array has index == argc, but - * it is the terminating NULL, so we must not free it. */ - while (argc_malloc < argc) { - free(argv[argc_malloc++]); - } - } - } - if (ENABLE_FEATURE_CLEAN_UP) { - free(argv); - argv = NULL; - } - list = do_insert ? list->m_prev : list->m_next; - } - return (show_only) ? 0 : rc; + return recursive_action(path, ACTION_RECURSE | ACTION_QUIET, + config_file_action, NULL, conf, 1); } -/* - * Check the matching between a pattern and a module name. - * We need this as *_* is equivalent to *-*, even in pattern matching. - */ -static int check_pattern(const char* pat_src, const char* mod_src) +static char *gather_options(llist_t *first, const char *module, int usecmdline) { - int ret; - - if (ENABLE_FEATURE_MODPROBE_FANCY_ALIAS) { - char* pat; - char* mod; - char* p; + struct modprobe_option *opt; + llist_t *n; + char *opts = xstrdup(""); + int optlen = 0; - pat = xstrdup(pat_src); - mod = xstrdup(mod_src); + for (n = first; n != NULL; n = n->link) { + opt = (struct modprobe_option *) n->data; - for (p = pat; (p = strchr(p, '-')); *p++ = '_'); - for (p = mod; (p = strchr(p, '-')); *p++ = '_'); - - ret = fnmatch(pat, mod, 0); - - if (ENABLE_FEATURE_CLEAN_UP) { - free(pat); - free(mod); - } + if (opt->module == NULL && !usecmdline) + continue; + if (opt->module != NULL && strcmp(opt->module, module) != 0) + continue; - return ret; + opts = xrealloc(opts, optlen + strlen(opt->option) + 2); + optlen += sprintf(opts + optlen, "%s ", opt->option); } - return fnmatch(pat_src, mod_src, 0); + return opts; } -/* - * Builds the dependency list (aka stack) of a module. - * head: the highest module in the stack (last to insmod, first to rmmod) - * tail: the lowest module in the stack (first to insmod, last to rmmod) - */ -static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **tail) +static int do_modprobe(struct modprobe_conf *conf, const char *module) { - struct mod_list_t *find; - struct dep_t *dt; - struct mod_opt_t *opt = NULL; - char *path = NULL; - - /* Search for the given module name amongst all dependency rules. - * The module name in a dependency rule can be a shell pattern, - * so try to match the given module name against such a pattern. - * Of course if the name in the dependency rule is a plain string, - * then we consider it a pattern, and matching will still work. */ - for (dt = depend; dt; dt = dt->m_next) { - if (check_pattern(dt->m_name, mod) == 0) { - break; - } - } - - if (!dt) { - bb_error_msg("module %s not found", mod); - return; - } + RESERVE_CONFIG_BUFFER(modname, MODULE_NAME_LEN); + llist_t *deps = NULL; + char *fn, *options, *colon = NULL, *tokens[2]; + parser_t *p; + int rc = -1; + + p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, fopen_for_read); + if (p == NULL) + goto error; + + while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) { + colon = last_char_is(tokens[0], ':'); + if (colon == NULL) + continue; - // resolve alias names - while (dt->m_isalias) { - if (dt->m_depcnt == 1) { - struct dep_t *adt; + filename2modname(tokens[0], modname); + if (strcmp(modname, module) == 0) + break; - for (adt = depend; adt; adt = adt->m_next) { - if (check_pattern(adt->m_name, dt->m_deparr[0]) == 0 && - !(ENABLE_FEATURE_MODPROBE_BLACKLIST && - adt->m_isblacklisted)) - break; - } - if (adt) { - /* This is the module we are aliased to */ - struct mod_opt_t *opts = dt->m_options; - /* Option of the alias are appended to the options of the module */ - while (opts) { - adt->m_options = append_option(adt->m_options, opts->m_opt_val); - opts = opts->m_next; - } - dt = adt; - } else { - bb_error_msg("module %s not found", mod); - return; - } - } else { - bb_error_msg("bad alias %s", dt->m_name); - return; - } + colon = NULL; } - - mod = dt->m_name; - path = dt->m_path; - opt = dt->m_options; - - // search for duplicates - for (find = *head; find; find = find->m_next) { - if (strcmp(mod, find->m_name) == 0) { - // found -> dequeue it - - if (find->m_prev) - find->m_prev->m_next = find->m_next; - else - *head = find->m_next; - - if (find->m_next) - find->m_next->m_prev = find->m_prev; - else - *tail = find->m_prev; - - break; // there can be only one duplicate + if (colon == NULL) + goto error_not_found; + + colon[0] = '\0'; + llist_add_to(&deps, xstrdup(tokens[0])); + if (tokens[1]) + string_to_llist(tokens[1], &deps, " "); + + if (!(option_mask32 & MODPROBE_OPT_REMOVE)) + deps = llist_rev(deps); + + rc = 0; + while (deps && rc == 0) { + fn = llist_pop(&deps); + filename2modname(fn, modname); + if (option_mask32 & MODPROBE_OPT_REMOVE) { + if (bb_delete_module(modname, O_EXCL) != 0) + rc = errno; + } else if (llist_find(loaded, modname) == NULL) { + options = gather_options(conf->options, modname, + strcmp(modname, module) == 0); + rc = bb_init_module(fn, options); + if (rc == 0) + llist_add_to(&loaded, xstrdup(modname)); + if (ENABLE_FEATURE_CLEAN_UP) + free(options); } - } - - if (!find) { // did not find a duplicate - find = xzalloc(sizeof(struct mod_list_t)); - find->m_name = mod; - find->m_path = path; - find->m_options = opt; - } - - // enqueue at tail - if (*tail) - (*tail)->m_next = find; - find->m_prev = *tail; - find->m_next = NULL; /* possibly NOT done by xzalloc! */ - - if (!*head) - *head = find; - *tail = find; - - if (dt) { - int i; - /* Add all dependable module for that new module */ - for (i = 0; i < dt->m_depcnt; i++) - check_dep(dt->m_deparr[i], head, tail); - } -} - -static int mod_insert(char **argv) -{ - struct mod_list_t *tail = NULL; - struct mod_list_t *head = NULL; - char *modname = *argv++; - int rc; - - // get dep list for module mod - check_dep(modname, &head, &tail); - - rc = 1; - if (head && tail) { - while (*argv) - head->m_options = append_option(head->m_options, *argv++); - - // process tail ---> head - rc = mod_process(tail, 1); - if (rc) { - /* - * In case of using udev, multiple instances of modprobe can be - * spawned to load the same module (think of two same usb devices, - * for example; or cold-plugging at boot time). Thus we shouldn't - * fail if the module was loaded, and not by us. - */ - if (already_loaded(modname)) - rc = 0; - } + if (ENABLE_FEATURE_CLEAN_UP) + free(fn); } - return rc; -} - -static int mod_remove(char *modname) -{ - static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL }; - - int rc; - struct mod_list_t *head = NULL; - struct mod_list_t *tail = NULL; - if (modname) - check_dep(modname, &head, &tail); - else // autoclean - head = tail = (struct mod_list_t*) &rm_a_dummy; - - rc = 1; - if (head && tail) - rc = mod_process(head, 0); // process head ---> tail +error_not_found: + config_close(p); +error: + if (ENABLE_FEATURE_CLEAN_UP) + RELEASE_CONFIG_BUFFER(modname); + if (rc > 0 && !(option_mask32 & INSMOD_OPT_SILENT)) + bb_error_msg("Failed to %sload module %s: %s.", + (option_mask32 & MODPROBE_OPT_REMOVE) ? "un" : "", + module, moderror(rc)); return rc; } int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int modprobe_main(int argc UNUSED_PARAM, char **argv) { - int rc = EXIT_SUCCESS; - unsigned opt; - char *unused; + struct utsname uts; + int num_modules, i, rc; + llist_t *options = NULL; + parser_t *parser; opt_complementary = "q-v:v-q"; - opt = getopt32(argv, MAIN_OPT_STR, &unused, &unused); + getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS, + NULL, NULL); argv += optind; - - if (opt & (DUMP_CONF_EXIT | LIST_ALL)) - return EXIT_SUCCESS; - if (opt & (RESTRICT_DIR | CONFIG_FILE)) - bb_error_msg_and_die("-t and -C not supported"); - - depend = build_dep(); - - if (!depend) - bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE); - - if (remove_opt) { - do { - /* (*argv) can be NULL here */ - if (mod_remove(*argv)) { - bb_perror_msg("failed to %s module %s", "remove", - *argv); - rc = EXIT_FAILURE; - } - } while (*argv && *++argv); + argc -= optind; + + if (option_mask32 & (MODPROBE_OPT_DUMP_ONLY | MODPROBE_OPT_LIST_ONLY | + MODPROBE_OPT_SHOW_ONLY)) + bb_error_msg_and_die("not supported"); + + /* goto modules location */ + xchdir(CONFIG_DEFAULT_MODULES_DIR); + uname(&uts); + xchdir(uts.release); + + if (option_mask32 & (MODPROBE_OPT_REMOVE | MODPROBE_OPT_INSERT_ALL)) { + /* each parameter is a module name */ + num_modules = argc; + if (num_modules == 0) { + if (bb_delete_module(NULL, O_NONBLOCK|O_EXCL) != 0) + bb_perror_msg_and_die("rmmod"); + return EXIT_SUCCESS; + } } else { - if (!*argv) - bb_error_msg_and_die("no module or pattern provided"); + /* the only module, the rest of parameters are options */ + num_modules = 1; + add_option(&options, NULL, parse_cmdline_module_options(argv)); + } - if (mod_insert(argv)) - bb_perror_msg_and_die("failed to %s module %s", "load", *argv); + /* cache modules */ + parser = config_open2("/proc/modules", fopen_for_read); + if (parser) { + char *s; + while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) + llist_add_to(&loaded, xstrdup(s)); + config_close(parser); } - /* Here would be a good place to free up memory allocated during the dependencies build. */ + for (i = 0; i < num_modules; i++) { + struct modprobe_conf *conf; + + conf = xzalloc(sizeof(struct modprobe_conf)); + conf->options = options; + filename2modname(argv[i], conf->probename); + read_config(conf, "/etc/modprobe.conf"); + read_config(conf, "/etc/modprobe.d"); + if (ENABLE_FEATURE_MODUTILS_SYMBOLS && + conf->aliases == NULL && strncmp(argv[i], "symbol:", 7) == 0) + read_config(conf, "modules.symbols"); + + if (ENABLE_FEATURE_MODUTILS_ALIAS && conf->aliases == NULL) + read_config(conf, "modules.alias"); + + if (conf->aliases == NULL) { + /* Try if module by literal name is found; literal + * names are blacklist only if '-b' is given. */ + if (!(option_mask32 & MODPROBE_OPT_BLACKLIST) || + check_blacklist(conf, conf->probename)) { + rc = do_modprobe(conf, conf->probename); + if (rc < 0 && !(option_mask32 & INSMOD_OPT_SILENT)) + bb_error_msg("Module %s not found.", argv[i]); + } + } else { + /* Probe all aliases */ + while (conf->aliases != NULL) { + char *realname = llist_pop(&conf->aliases); + if (check_blacklist(conf, realname)) + do_modprobe(conf, realname); + if (ENABLE_FEATURE_CLEAN_UP) + free(realname); + } + } + } - return rc; + return EXIT_SUCCESS; } diff --git a/modutils/modutils-24.c b/modutils/modutils-24.c new file mode 100644 index 000000000..2bc4bda92 --- /dev/null +++ b/modutils/modutils-24.c @@ -0,0 +1,3936 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini insmod implementation for busybox + * + * This version of insmod supports ARM, CRIS, H8/300, x86, ia64, x86_64, + * m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64. + * + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * and Ron Alder <alder@lineo.com> + * + * Rodney Radford <rradford@mindspring.com> 17-Aug-2004. + * Added x86_64 support. + * + * Miles Bader <miles@gnu.org> added NEC V850E support. + * + * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4 + * and (theoretically) SH3. I have only tested SH4 in little endian mode. + * + * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and + * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only + * very minor changes required to also work with StrongArm and presumably + * all ARM based systems. + * + * Yoshinori Sato <ysato@users.sourceforge.jp> 19-May-2004. + * added Renesas H8/300 support. + * + * Paul Mundt <lethal@linux-sh.org> 08-Aug-2003. + * Integrated support for sh64 (SH-5), from preliminary modutils + * patches from Benedict Gaster <benedict.gaster@superh.com>. + * Currently limited to support for 32bit ABI. + * + * Magnus Damm <damm@opensource.se> 22-May-2002. + * The plt and got code are now using the same structs. + * Added generic linked list code to fully support PowerPC. + * Replaced the mess in arch_apply_relocation() with architecture blocks. + * The arch_create_got() function got cleaned up with architecture blocks. + * These blocks should be easy maintain and sync with obj_xxx.c in modutils. + * + * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001. + * PowerPC specific code stolen from modutils-2.3.16, + * written by Paul Mackerras, Copyright 1996, 1997 Linux International. + * I've only tested the code on mpc8xx platforms in big-endian mode. + * Did some cleanup and added USE_xxx_ENTRIES... + * + * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001. + * based on modutils-2.4.2 + * MIPS specific support for Elf loading and relocation. + * Copyright 1996, 1997 Linux International. + * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu> + * + * Based almost entirely on the Linux modutils-2.3.11 implementation. + * Copyright 1996, 1997 Linux International. + * New implementation contributed by Richard Henderson <rth@tamu.edu> + * Based on original work by Bjorn Ekwall <bj0rn@blox.se> + * Restructured (and partly rewritten) by: + * Björn Ekwall <bj0rn@blox.se> February 1999 + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "libbb.h" +#include "modutils.h" +#include <libgen.h> +#include <sys/utsname.h> + +#if ENABLE_FEATURE_INSMOD_LOADINKMEM +#define LOADBITS 0 +#else +#define LOADBITS 1 +#endif + +/* Alpha */ +#if defined(__alpha__) +#define MATCH_MACHINE(x) (x == EM_ALPHA) +#define SHT_RELM SHT_RELA +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#endif + +/* ARM support */ +#if defined(__arm__) +#define MATCH_MACHINE(x) (x == EM_ARM) +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 +#define USE_PLT_ENTRIES +#define PLT_ENTRY_SIZE 8 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 8 +#define USE_SINGLE +#endif + +/* blackfin */ +#if defined(BFIN) +#define MATCH_MACHINE(x) (x == EM_BLACKFIN) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif + +/* CRIS */ +#if defined(__cris__) +#define MATCH_MACHINE(x) (x == EM_CRIS) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#ifndef EM_CRIS +#define EM_CRIS 76 +#define R_CRIS_NONE 0 +#define R_CRIS_32 3 +#endif +#endif + +/* H8/300 */ +#if defined(__H8300H__) || defined(__H8300S__) +#define MATCH_MACHINE(x) (x == EM_H8_300) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_SINGLE +#define SYMBOL_PREFIX "_" +#endif + +/* PA-RISC / HP-PA */ +#if defined(__hppa__) +#define MATCH_MACHINE(x) (x == EM_PARISC) +#define SHT_RELM SHT_RELA +#if defined(__LP64__) +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#else +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif +#endif + +/* x86 */ +#if defined(__i386__) +#ifndef EM_486 +#define MATCH_MACHINE(x) (x == EM_386) +#else +#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486) +#endif +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 4 +#define USE_SINGLE +#endif + +/* IA64, aka Itanium */ +#if defined(__ia64__) +#define MATCH_MACHINE(x) (x == EM_IA_64) +#define SHT_RELM SHT_RELA +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#endif + +/* m68k */ +#if defined(__mc68000__) +#define MATCH_MACHINE(x) (x == EM_68K) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 4 +#define USE_SINGLE +#endif + +/* Microblaze */ +#if defined(__microblaze__) +#define USE_SINGLE +#include <linux/elf-em.h> +#define MATCH_MACHINE(x) (x == EM_XILINX_MICROBLAZE) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif + +/* MIPS */ +#if defined(__mips__) +#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE) +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 +/* Account for ELF spec changes. */ +#ifndef EM_MIPS_RS3_LE +#ifdef EM_MIPS_RS4_BE +#define EM_MIPS_RS3_LE EM_MIPS_RS4_BE +#else +#define EM_MIPS_RS3_LE 10 +#endif +#endif /* !EM_MIPS_RS3_LE */ +#define ARCHDATAM "__dbe_table" +#endif + +/* Nios II */ +#if defined(__nios2__) +#define MATCH_MACHINE(x) (x == EM_ALTERA_NIOS2) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif + +/* PowerPC */ +#if defined(__powerpc64__) +#define MATCH_MACHINE(x) (x == EM_PPC64) +#define SHT_RELM SHT_RELA +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#elif defined(__powerpc__) +#define MATCH_MACHINE(x) (x == EM_PPC) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_PLT_ENTRIES +#define PLT_ENTRY_SIZE 16 +#define USE_PLT_LIST +#define LIST_ARCHTYPE ElfW(Addr) +#define USE_LIST +#define ARCHDATAM "__ftr_fixup" +#endif + +/* S390 */ +#if defined(__s390__) +#define MATCH_MACHINE(x) (x == EM_S390) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_PLT_ENTRIES +#define PLT_ENTRY_SIZE 8 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 8 +#define USE_SINGLE +#endif + +/* SuperH */ +#if defined(__sh__) +#define MATCH_MACHINE(x) (x == EM_SH) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 4 +#define USE_SINGLE +/* the SH changes have only been tested in =little endian= mode */ +/* I'm not sure about big endian, so let's warn: */ +#if defined(__sh__) && BB_BIG_ENDIAN +# error insmod.c may require changes for use on big endian SH +#endif +/* it may or may not work on the SH1/SH2... Error on those also */ +#if ((!(defined(__SH3__) || defined(__SH4__) || defined(__SH5__)))) && (defined(__sh__)) +#error insmod.c may require changes for SH1 or SH2 use +#endif +#endif + +/* Sparc */ +#if defined(__sparc__) +#define MATCH_MACHINE(x) (x == EM_SPARC) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#endif + +/* v850e */ +#if defined(__v850e__) +#define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define USE_PLT_ENTRIES +#define PLT_ENTRY_SIZE 8 +#define USE_SINGLE +#ifndef EM_CYGNUS_V850 /* grumble */ +#define EM_CYGNUS_V850 0x9080 +#endif +#define SYMBOL_PREFIX "_" +#endif + +/* X86_64 */ +#if defined(__x86_64__) +#define MATCH_MACHINE(x) (x == EM_X86_64) +#define SHT_RELM SHT_RELA +#define USE_GOT_ENTRIES +#define GOT_ENTRY_SIZE 8 +#define USE_SINGLE +#define Elf64_RelM Elf64_Rela +#define ELFCLASSM ELFCLASS64 +#endif + +#ifndef SHT_RELM +#error Sorry, but insmod.c does not yet support this architecture... +#endif + + +//---------------------------------------------------------------------------- +//--------modutils module.h, lines 45-242 +//---------------------------------------------------------------------------- + +/* Definitions for the Linux module syscall interface. + Copyright 1996, 1997 Linux International. + + Contributed by Richard Henderson <rth@tamu.edu> + + This file is part of the Linux modutils. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 2 of the License, or (at your + option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + + +#ifndef MODUTILS_MODULE_H + +/*======================================================================*/ +/* For sizeof() which are related to the module platform and not to the + environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */ + +#define tgt_sizeof_char sizeof(char) +#define tgt_sizeof_short sizeof(short) +#define tgt_sizeof_int sizeof(int) +#define tgt_sizeof_long sizeof(long) +#define tgt_sizeof_char_p sizeof(char *) +#define tgt_sizeof_void_p sizeof(void *) +#define tgt_long long + +#if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64) +#undef tgt_sizeof_long +#undef tgt_sizeof_char_p +#undef tgt_sizeof_void_p +#undef tgt_long +enum { + tgt_sizeof_long = 8, + tgt_sizeof_char_p = 8, + tgt_sizeof_void_p = 8 +}; +#define tgt_long long long +#endif + +/*======================================================================*/ +/* The structures used in Linux 2.1. */ + +/* Note: new_module_symbol does not use tgt_long intentionally */ +struct new_module_symbol { + unsigned long value; + unsigned long name; +}; + +struct new_module_persist; + +struct new_module_ref { + unsigned tgt_long dep; /* kernel addresses */ + unsigned tgt_long ref; + unsigned tgt_long next_ref; +}; + +struct new_module { + unsigned tgt_long size_of_struct; /* == sizeof(module) */ + unsigned tgt_long next; + unsigned tgt_long name; + unsigned tgt_long size; + + tgt_long usecount; + unsigned tgt_long flags; /* AUTOCLEAN et al */ + + unsigned nsyms; + unsigned ndeps; + + unsigned tgt_long syms; + unsigned tgt_long deps; + unsigned tgt_long refs; + unsigned tgt_long init; + unsigned tgt_long cleanup; + unsigned tgt_long ex_table_start; + unsigned tgt_long ex_table_end; +#ifdef __alpha__ + unsigned tgt_long gp; +#endif + /* Everything after here is extension. */ + unsigned tgt_long persist_start; + unsigned tgt_long persist_end; + unsigned tgt_long can_unload; + unsigned tgt_long runsize; + const char *kallsyms_start; /* All symbols for kernel debugging */ + const char *kallsyms_end; + const char *archdata_start; /* arch specific data for module */ + const char *archdata_end; + const char *kernel_data; /* Reserved for kernel internal use */ +}; + +#ifdef ARCHDATAM +#define ARCHDATA_SEC_NAME ARCHDATAM +#else +#define ARCHDATA_SEC_NAME "__archdata" +#endif +#define KALLSYMS_SEC_NAME "__kallsyms" + + +struct new_module_info { + unsigned long addr; + unsigned long size; + unsigned long flags; + long usecount; +}; + +/* Bits of module.flags. */ +enum { + NEW_MOD_RUNNING = 1, + NEW_MOD_DELETED = 2, + NEW_MOD_AUTOCLEAN = 4, + NEW_MOD_VISITED = 8, + NEW_MOD_USED_ONCE = 16 +}; + +int init_module(const char *name, const struct new_module *); +int query_module(const char *name, int which, void *buf, + size_t bufsize, size_t *ret); + +/* Values for query_module's which. */ +enum { + QM_MODULES = 1, + QM_DEPS = 2, + QM_REFS = 3, + QM_SYMBOLS = 4, + QM_INFO = 5 +}; + +/*======================================================================*/ +/* The system calls unchanged between 2.0 and 2.1. */ + +unsigned long create_module(const char *, size_t); +int delete_module(const char *module, unsigned int flags); + + +#endif /* module.h */ + +//---------------------------------------------------------------------------- +//--------end of modutils module.h +//---------------------------------------------------------------------------- + + + +//---------------------------------------------------------------------------- +//--------modutils obj.h, lines 253-462 +//---------------------------------------------------------------------------- + +/* Elf object file loading and relocation routines. + Copyright 1996, 1997 Linux International. + + Contributed by Richard Henderson <rth@tamu.edu> + + This file is part of the Linux modutils. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 2 of the License, or (at your + option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + + +#ifndef MODUTILS_OBJ_H + +/* The relocatable object is manipulated using elfin types. */ + +#include <elf.h> +#include <endian.h> + +#ifndef ElfW +# if ELFCLASSM == ELFCLASS32 +# define ElfW(x) Elf32_ ## x +# define ELFW(x) ELF32_ ## x +# else +# define ElfW(x) Elf64_ ## x +# define ELFW(x) ELF64_ ## x +# endif +#endif + +/* For some reason this is missing from some ancient C libraries.... */ +#ifndef ELF32_ST_INFO +# define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) +#endif + +#ifndef ELF64_ST_INFO +# define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) +#endif + +#define ELF_ST_BIND(info) ELFW(ST_BIND)(info) +#define ELF_ST_TYPE(info) ELFW(ST_TYPE)(info) +#define ELF_ST_INFO(bind, type) ELFW(ST_INFO)(bind, type) +#define ELF_R_TYPE(val) ELFW(R_TYPE)(val) +#define ELF_R_SYM(val) ELFW(R_SYM)(val) + +struct obj_string_patch; +struct obj_symbol_patch; + +struct obj_section +{ + ElfW(Shdr) header; + const char *name; + char *contents; + struct obj_section *load_next; + int idx; +}; + +struct obj_symbol +{ + struct obj_symbol *next; /* hash table link */ + const char *name; + unsigned long value; + unsigned long size; + int secidx; /* the defining section index/module */ + int info; + int ksymidx; /* for export to the kernel symtab */ + int referenced; /* actually used in the link */ +}; + +/* Hardcode the hash table size. We shouldn't be needing so many + symbols that we begin to degrade performance, and we get a big win + by giving the compiler a constant divisor. */ + +#define HASH_BUCKETS 521 + +struct obj_file { + ElfW(Ehdr) header; + ElfW(Addr) baseaddr; + struct obj_section **sections; + struct obj_section *load_order; + struct obj_section **load_order_search_start; + struct obj_string_patch *string_patches; + struct obj_symbol_patch *symbol_patches; + int (*symbol_cmp)(const char *, const char *); + unsigned long (*symbol_hash)(const char *); + unsigned long local_symtab_size; + struct obj_symbol **local_symtab; + struct obj_symbol *symtab[HASH_BUCKETS]; +}; + +enum obj_reloc { + obj_reloc_ok, + obj_reloc_overflow, + obj_reloc_dangerous, + obj_reloc_unhandled +}; + +struct obj_string_patch { + struct obj_string_patch *next; + int reloc_secidx; + ElfW(Addr) reloc_offset; + ElfW(Addr) string_offset; +}; + +struct obj_symbol_patch { + struct obj_symbol_patch *next; + int reloc_secidx; + ElfW(Addr) reloc_offset; + struct obj_symbol *sym; +}; + + +/* Generic object manipulation routines. */ + +static unsigned long obj_elf_hash(const char *); + +static unsigned long obj_elf_hash_n(const char *, unsigned long len); + +static struct obj_symbol *obj_find_symbol(struct obj_file *f, + const char *name); + +static ElfW(Addr) obj_symbol_final_value(struct obj_file *f, + struct obj_symbol *sym); + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING +static void obj_set_symbol_compare(struct obj_file *f, + int (*cmp)(const char *, const char *), + unsigned long (*hash)(const char *)); +#endif + +static struct obj_section *obj_find_section(struct obj_file *f, + const char *name); + +static void obj_insert_section_load_order(struct obj_file *f, + struct obj_section *sec); + +static struct obj_section *obj_create_alloced_section(struct obj_file *f, + const char *name, + unsigned long align, + unsigned long size); + +static struct obj_section *obj_create_alloced_section_first(struct obj_file *f, + const char *name, + unsigned long align, + unsigned long size); + +static void *obj_extend_section(struct obj_section *sec, unsigned long more); + +static void obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, + const char *string); + +static void obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, + struct obj_symbol *sym); + +static void obj_check_undefineds(struct obj_file *f); + +static void obj_allocate_commons(struct obj_file *f); + +static unsigned long obj_load_size(struct obj_file *f); + +static int obj_relocate(struct obj_file *f, ElfW(Addr) base); + +static struct obj_file *obj_load(FILE *f, int loadprogbits); + +static int obj_create_image(struct obj_file *f, char *image); + +/* Architecture specific manipulation routines. */ + +static struct obj_file *arch_new_file(void); + +static struct obj_section *arch_new_section(void); + +static struct obj_symbol *arch_new_symbol(void); + +static enum obj_reloc arch_apply_relocation(struct obj_file *f, + struct obj_section *targsec, + /*struct obj_section *symsec,*/ + struct obj_symbol *sym, + ElfW(RelM) *rel, ElfW(Addr) value); + +static void arch_create_got(struct obj_file *f); +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE +static int obj_gpl_license(struct obj_file *f, const char **license); +#endif /* FEATURE_CHECK_TAINTED_MODULE */ +#endif /* obj.h */ +//---------------------------------------------------------------------------- +//--------end of modutils obj.h +//---------------------------------------------------------------------------- + + +/* SPFX is always a string, so it can be concatenated to string constants. */ +#ifdef SYMBOL_PREFIX +#define SPFX SYMBOL_PREFIX +#else +#define SPFX "" +#endif + +enum { STRVERSIONLEN = 64 }; + +/*======================================================================*/ + +#define flag_force_load (option_mask32 & INSMOD_OPT_FORCE) +#define flag_autoclean (option_mask32 & INSMOD_OPT_KERNELD) +#define flag_verbose (option_mask32 & INSMOD_OPT_VERBOSE) +#define flag_quiet (option_mask32 & INSMOD_OPT_SILENT) +#define flag_noexport (option_mask32 & INSMOD_OPT_NO_EXPORT) +#define flag_print_load_map (option_mask32 & INSMOD_OPT_PRINT_MAP) + +/*======================================================================*/ + +#if defined(USE_LIST) + +struct arch_list_entry +{ + struct arch_list_entry *next; + LIST_ARCHTYPE addend; + int offset; + int inited : 1; +}; + +#endif + +#if defined(USE_SINGLE) + +struct arch_single_entry +{ + int offset; + int inited : 1; + int allocated : 1; +}; + +#endif + +#if defined(__mips__) +struct mips_hi16 +{ + struct mips_hi16 *next; + ElfW(Addr) *addr; + ElfW(Addr) value; +}; +#endif + +struct arch_file { + struct obj_file root; +#if defined(USE_PLT_ENTRIES) + struct obj_section *plt; +#endif +#if defined(USE_GOT_ENTRIES) + struct obj_section *got; +#endif +#if defined(__mips__) + struct mips_hi16 *mips_hi16_list; +#endif +}; + +struct arch_symbol { + struct obj_symbol root; +#if defined(USE_PLT_ENTRIES) +#if defined(USE_PLT_LIST) + struct arch_list_entry *pltent; +#else + struct arch_single_entry pltent; +#endif +#endif +#if defined(USE_GOT_ENTRIES) + struct arch_single_entry gotent; +#endif +}; + + +struct external_module { + const char *name; + ElfW(Addr) addr; + int used; + size_t nsyms; + struct new_module_symbol *syms; +}; + +static struct new_module_symbol *ksyms; +static size_t nksyms; + +static struct external_module *ext_modules; +static int n_ext_modules; +static int n_ext_modules_used; + +/*======================================================================*/ + + +static struct obj_file *arch_new_file(void) +{ + struct arch_file *f; + f = xzalloc(sizeof(*f)); + return &f->root; /* it's a first member */ +} + +static struct obj_section *arch_new_section(void) +{ + return xzalloc(sizeof(struct obj_section)); +} + +static struct obj_symbol *arch_new_symbol(void) +{ + struct arch_symbol *sym; + sym = xzalloc(sizeof(*sym)); + return &sym->root; +} + +static enum obj_reloc +arch_apply_relocation(struct obj_file *f, + struct obj_section *targsec, + /*struct obj_section *symsec,*/ + struct obj_symbol *sym, + ElfW(RelM) *rel, ElfW(Addr) v) +{ +#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \ + || defined(__sh__) || defined(__s390__) || defined(__x86_64__) \ + || defined(__powerpc__) || defined(__mips__) + struct arch_file *ifile = (struct arch_file *) f; +#endif + enum obj_reloc ret = obj_reloc_ok; + ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset); +#if defined(__arm__) || defined(__H8300H__) || defined(__H8300S__) \ + || defined(__i386__) || defined(__mc68000__) || defined(__microblaze__) \ + || defined(__mips__) || defined(__nios2__) || defined(__powerpc__) \ + || defined(__s390__) || defined(__sh__) || defined(__x86_64__) + ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset; +#endif +#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) + struct arch_symbol *isym = (struct arch_symbol *) sym; +#endif +#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \ + || defined(__sh__) || defined(__s390__) +#if defined(USE_GOT_ENTRIES) + ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0; +#endif +#endif +#if defined(USE_PLT_ENTRIES) + ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0; + unsigned long *ip; +# if defined(USE_PLT_LIST) + struct arch_list_entry *pe; +# else + struct arch_single_entry *pe; +# endif +#endif + + switch (ELF_R_TYPE(rel->r_info)) { + +#if defined(__arm__) + + case R_ARM_NONE: + break; + + case R_ARM_ABS32: + *loc += v; + break; + + case R_ARM_GOT32: + goto bb_use_got; + + case R_ARM_GOTPC: + /* relative reloc, always to _GLOBAL_OFFSET_TABLE_ + * (which is .got) similar to branch, + * but is full 32 bits relative */ + + *loc += got - dot; + break; + + case R_ARM_PC24: + case R_ARM_PLT32: + goto bb_use_plt; + + case R_ARM_GOTOFF: /* address relative to the got */ + *loc += v - got; + break; + +#elif defined(__cris__) + + case R_CRIS_NONE: + break; + + case R_CRIS_32: + /* CRIS keeps the relocation value in the r_addend field and + * should not use whats in *loc at all + */ + *loc = v; + break; + +#elif defined(__H8300H__) || defined(__H8300S__) + + case R_H8_DIR24R8: + loc = (ElfW(Addr) *)((ElfW(Addr))loc - 1); + *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v); + break; + case R_H8_DIR24A8: + *loc += v; + break; + case R_H8_DIR32: + case R_H8_DIR32A16: + *loc += v; + break; + case R_H8_PCREL16: + v -= dot + 2; + if ((ElfW(Sword))v > 0x7fff || + (ElfW(Sword))v < -(ElfW(Sword))0x8000) + ret = obj_reloc_overflow; + else + *(unsigned short *)loc = v; + break; + case R_H8_PCREL8: + v -= dot + 1; + if ((ElfW(Sword))v > 0x7f || + (ElfW(Sword))v < -(ElfW(Sword))0x80) + ret = obj_reloc_overflow; + else + *(unsigned char *)loc = v; + break; + +#elif defined(__i386__) + + case R_386_NONE: + break; + + case R_386_32: + *loc += v; + break; + + case R_386_PLT32: + case R_386_PC32: + case R_386_GOTOFF: + *loc += v - dot; + break; + + case R_386_GLOB_DAT: + case R_386_JMP_SLOT: + *loc = v; + break; + + case R_386_RELATIVE: + *loc += f->baseaddr; + break; + + case R_386_GOTPC: + *loc += got - dot; + break; + + case R_386_GOT32: + goto bb_use_got; + break; + +#elif defined(__microblaze__) + case R_MICROBLAZE_NONE: + case R_MICROBLAZE_64_NONE: + case R_MICROBLAZE_32_SYM_OP_SYM: + case R_MICROBLAZE_32_PCREL: + break; + + case R_MICROBLAZE_64_PCREL: { + /* dot is the address of the current instruction. + * v is the target symbol address. + * So we need to extract the offset in the code, + * adding v, then subtrating the current address + * of this instruction. + * Ex: "IMM 0xFFFE bralid 0x0000" = "bralid 0xFFFE0000" + */ + + /* Get split offset stored in code */ + unsigned int temp = (loc[0] & 0xFFFF) << 16 | + (loc[1] & 0xFFFF); + + /* Adjust relative offset. -4 adjustment required + * because dot points to the IMM insn, but branch + * is computed relative to the branch instruction itself. + */ + temp += v - dot - 4; + + /* Store back into code */ + loc[0] = (loc[0] & 0xFFFF0000) | temp >> 16; + loc[1] = (loc[1] & 0xFFFF0000) | (temp & 0xFFFF); + + break; + } + + case R_MICROBLAZE_32: + *loc += v; + break; + + case R_MICROBLAZE_64: { + /* Get split pointer stored in code */ + unsigned int temp1 = (loc[0] & 0xFFFF) << 16 | + (loc[1] & 0xFFFF); + + /* Add reloc offset */ + temp1+=v; + + /* Store back into code */ + loc[0] = (loc[0] & 0xFFFF0000) | temp1 >> 16; + loc[1] = (loc[1] & 0xFFFF0000) | (temp1 & 0xFFFF); + + break; + } + + case R_MICROBLAZE_32_PCREL_LO: + case R_MICROBLAZE_32_LO: + case R_MICROBLAZE_SRO32: + case R_MICROBLAZE_SRW32: + ret = obj_reloc_unhandled; + break; + +#elif defined(__mc68000__) + + case R_68K_NONE: + break; + + case R_68K_32: + *loc += v; + break; + + case R_68K_8: + if (v > 0xff) { + ret = obj_reloc_overflow; + } + *(char *)loc = v; + break; + + case R_68K_16: + if (v > 0xffff) { + ret = obj_reloc_overflow; + } + *(short *)loc = v; + break; + + case R_68K_PC8: + v -= dot; + if ((ElfW(Sword))v > 0x7f || + (ElfW(Sword))v < -(ElfW(Sword))0x80) { + ret = obj_reloc_overflow; + } + *(char *)loc = v; + break; + + case R_68K_PC16: + v -= dot; + if ((ElfW(Sword))v > 0x7fff || + (ElfW(Sword))v < -(ElfW(Sword))0x8000) { + ret = obj_reloc_overflow; + } + *(short *)loc = v; + break; + + case R_68K_PC32: + *(int *)loc = v - dot; + break; + + case R_68K_GLOB_DAT: + case R_68K_JMP_SLOT: + *loc = v; + break; + + case R_68K_RELATIVE: + *(int *)loc += f->baseaddr; + break; + + case R_68K_GOT32: + goto bb_use_got; + +# ifdef R_68K_GOTOFF + case R_68K_GOTOFF: + *loc += v - got; + break; +# endif + +#elif defined(__mips__) + + case R_MIPS_NONE: + break; + + case R_MIPS_32: + *loc += v; + break; + + case R_MIPS_26: + if (v % 4) + ret = obj_reloc_dangerous; + if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000)) + ret = obj_reloc_overflow; + *loc = + (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) & + 0x03ffffff); + break; + + case R_MIPS_HI16: + { + struct mips_hi16 *n; + + /* We cannot relocate this one now because we don't know the value + of the carry we need to add. Save the information, and let LO16 + do the actual relocation. */ + n = xmalloc(sizeof *n); + n->addr = loc; + n->value = v; + n->next = ifile->mips_hi16_list; + ifile->mips_hi16_list = n; + break; + } + + case R_MIPS_LO16: + { + unsigned long insnlo = *loc; + ElfW(Addr) val, vallo; + + /* Sign extend the addend we extract from the lo insn. */ + vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; + + if (ifile->mips_hi16_list != NULL) { + struct mips_hi16 *l; + + l = ifile->mips_hi16_list; + while (l != NULL) { + struct mips_hi16 *next; + unsigned long insn; + + /* Do the HI16 relocation. Note that we actually don't + need to know anything about the LO16 itself, except where + to find the low 16 bits of the addend needed by the LO16. */ + insn = *l->addr; + val = + ((insn & 0xffff) << 16) + + vallo; + val += v; + + /* Account for the sign extension that will happen in the + low bits. */ + val = + ((val >> 16) + + ((val & 0x8000) != + 0)) & 0xffff; + + insn = (insn & ~0xffff) | val; + *l->addr = insn; + + next = l->next; + free(l); + l = next; + } + + ifile->mips_hi16_list = NULL; + } + + /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */ + val = v + vallo; + insnlo = (insnlo & ~0xffff) | (val & 0xffff); + *loc = insnlo; + break; + } + +#elif defined(__nios2__) + + case R_NIOS2_NONE: + break; + + case R_NIOS2_BFD_RELOC_32: + *loc += v; + break; + + case R_NIOS2_BFD_RELOC_16: + if (v > 0xffff) { + ret = obj_reloc_overflow; + } + *(short *)loc = v; + break; + + case R_NIOS2_BFD_RELOC_8: + if (v > 0xff) { + ret = obj_reloc_overflow; + } + *(char *)loc = v; + break; + + case R_NIOS2_S16: + { + Elf32_Addr word; + + if ((Elf32_Sword)v > 0x7fff || + (Elf32_Sword)v < -(Elf32_Sword)0x8000) { + ret = obj_reloc_overflow; + } + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | + (word & 0x3f); + } + break; + + case R_NIOS2_U16: + { + Elf32_Addr word; + + if (v > 0xffff) { + ret = obj_reloc_overflow; + } + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | + (word & 0x3f); + } + break; + + case R_NIOS2_PCREL16: + { + Elf32_Addr word; + + v -= dot + 4; + if ((Elf32_Sword)v > 0x7fff || + (Elf32_Sword)v < -(Elf32_Sword)0x8000) { + ret = obj_reloc_overflow; + } + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f); + } + break; + + case R_NIOS2_GPREL: + { + Elf32_Addr word, gp; + /* get _gp */ + gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp")); + v-=gp; + if ((Elf32_Sword)v > 0x7fff || + (Elf32_Sword)v < -(Elf32_Sword)0x8000) { + ret = obj_reloc_overflow; + } + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f); + } + break; + + case R_NIOS2_CALL26: + if (v & 3) + ret = obj_reloc_dangerous; + if ((v >> 28) != (dot >> 28)) + ret = obj_reloc_overflow; + *loc = (*loc & 0x3f) | ((v >> 2) << 6); + break; + + case R_NIOS2_IMM5: + { + Elf32_Addr word; + + if (v > 0x1f) { + ret = obj_reloc_overflow; + } + + word = *loc & ~0x7c0; + *loc = word | ((v & 0x1f) << 6); + } + break; + + case R_NIOS2_IMM6: + { + Elf32_Addr word; + + if (v > 0x3f) { + ret = obj_reloc_overflow; + } + + word = *loc & ~0xfc0; + *loc = word | ((v & 0x3f) << 6); + } + break; + + case R_NIOS2_IMM8: + { + Elf32_Addr word; + + if (v > 0xff) { + ret = obj_reloc_overflow; + } + + word = *loc & ~0x3fc0; + *loc = word | ((v & 0xff) << 6); + } + break; + + case R_NIOS2_HI16: + { + Elf32_Addr word; + + word = *loc; + *loc = ((((word >> 22) << 16) | ((v >>16) & 0xffff)) << 6) | + (word & 0x3f); + } + break; + + case R_NIOS2_LO16: + { + Elf32_Addr word; + + word = *loc; + *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | + (word & 0x3f); + } + break; + + case R_NIOS2_HIADJ16: + { + Elf32_Addr word1, word2; + + word1 = *loc; + word2 = ((v >> 16) + ((v >> 15) & 1)) & 0xffff; + *loc = ((((word1 >> 22) << 16) | word2) << 6) | + (word1 & 0x3f); + } + break; + +#elif defined(__powerpc64__) + /* PPC64 needs a 2.6 kernel, 2.4 module relocation irrelevant */ + +#elif defined(__powerpc__) + + case R_PPC_ADDR16_HA: + *(unsigned short *)loc = (v + 0x8000) >> 16; + break; + + case R_PPC_ADDR16_HI: + *(unsigned short *)loc = v >> 16; + break; + + case R_PPC_ADDR16_LO: + *(unsigned short *)loc = v; + break; + + case R_PPC_REL24: + goto bb_use_plt; + + case R_PPC_REL32: + *loc = v - dot; + break; + + case R_PPC_ADDR32: + *loc = v; + break; + +#elif defined(__s390__) + + case R_390_32: + *(unsigned int *) loc += v; + break; + case R_390_16: + *(unsigned short *) loc += v; + break; + case R_390_8: + *(unsigned char *) loc += v; + break; + + case R_390_PC32: + *(unsigned int *) loc += v - dot; + break; + case R_390_PC16DBL: + *(unsigned short *) loc += (v - dot) >> 1; + break; + case R_390_PC16: + *(unsigned short *) loc += v - dot; + break; + + case R_390_PLT32: + case R_390_PLT16DBL: + /* find the plt entry and initialize it. */ + pe = (struct arch_single_entry *) &isym->pltent; + if (pe->inited == 0) { + ip = (unsigned long *)(ifile->plt->contents + pe->offset); + ip[0] = 0x0d105810; /* basr 1,0; lg 1,10(1); br 1 */ + ip[1] = 0x100607f1; + if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL) + ip[2] = v - 2; + else + ip[2] = v; + pe->inited = 1; + } + + /* Insert relative distance to target. */ + v = plt + pe->offset - dot; + if (ELF_R_TYPE(rel->r_info) == R_390_PLT32) + *(unsigned int *) loc = (unsigned int) v; + else if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL) + *(unsigned short *) loc = (unsigned short) ((v + 2) >> 1); + break; + + case R_390_GLOB_DAT: + case R_390_JMP_SLOT: + *loc = v; + break; + + case R_390_RELATIVE: + *loc += f->baseaddr; + break; + + case R_390_GOTPC: + *(unsigned long *) loc += got - dot; + break; + + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + if (!isym->gotent.inited) + { + isym->gotent.inited = 1; + *(ElfW(Addr) *)(ifile->got->contents + isym->gotent.offset) = v; + } + if (ELF_R_TYPE(rel->r_info) == R_390_GOT12) + *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff; + else if (ELF_R_TYPE(rel->r_info) == R_390_GOT16) + *(unsigned short *) loc += isym->gotent.offset; + else if (ELF_R_TYPE(rel->r_info) == R_390_GOT32) + *(unsigned int *) loc += isym->gotent.offset; + break; + +# ifndef R_390_GOTOFF32 +# define R_390_GOTOFF32 R_390_GOTOFF +# endif + case R_390_GOTOFF32: + *loc += v - got; + break; + +#elif defined(__sh__) + + case R_SH_NONE: + break; + + case R_SH_DIR32: + *loc += v; + break; + + case R_SH_REL32: + *loc += v - dot; + break; + + case R_SH_PLT32: + *loc = v - dot; + break; + + case R_SH_GLOB_DAT: + case R_SH_JMP_SLOT: + *loc = v; + break; + + case R_SH_RELATIVE: + *loc = f->baseaddr + rel->r_addend; + break; + + case R_SH_GOTPC: + *loc = got - dot + rel->r_addend; + break; + + case R_SH_GOT32: + goto bb_use_got; + + case R_SH_GOTOFF: + *loc = v - got; + break; + +# if defined(__SH5__) + case R_SH_IMM_MEDLOW16: + case R_SH_IMM_LOW16: + { + ElfW(Addr) word; + + if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16) + v >>= 16; + + /* + * movi and shori have the format: + * + * | op | imm | reg | reserved | + * 31..26 25..10 9.. 4 3 .. 0 + * + * so we simply mask and or in imm. + */ + word = *loc & ~0x3fffc00; + word |= (v & 0xffff) << 10; + + *loc = word; + + break; + } + + case R_SH_IMM_MEDLOW16_PCREL: + case R_SH_IMM_LOW16_PCREL: + { + ElfW(Addr) word; + + word = *loc & ~0x3fffc00; + + v -= dot; + + if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16_PCREL) + v >>= 16; + + word |= (v & 0xffff) << 10; + + *loc = word; + + break; + } +# endif /* __SH5__ */ + +#elif defined(__v850e__) + + case R_V850_NONE: + break; + + case R_V850_32: + /* We write two shorts instead of a long because even + 32-bit insns only need half-word alignment, but + 32-bit data needs to be long-word aligned. */ + v += ((unsigned short *)loc)[0]; + v += ((unsigned short *)loc)[1] << 16; + ((unsigned short *)loc)[0] = v & 0xffff; + ((unsigned short *)loc)[1] = (v >> 16) & 0xffff; + break; + + case R_V850_22_PCREL: + goto bb_use_plt; + +#elif defined(__x86_64__) + + case R_X86_64_NONE: + break; + + case R_X86_64_64: + *loc += v; + break; + + case R_X86_64_32: + *(unsigned int *) loc += v; + if (v > 0xffffffff) + { + ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */ + /* error("Possibly is module compiled without -mcmodel=kernel!"); */ + } + break; + + case R_X86_64_32S: + *(signed int *) loc += v; + break; + + case R_X86_64_16: + *(unsigned short *) loc += v; + break; + + case R_X86_64_8: + *(unsigned char *) loc += v; + break; + + case R_X86_64_PC32: + *(unsigned int *) loc += v - dot; + break; + + case R_X86_64_PC16: + *(unsigned short *) loc += v - dot; + break; + + case R_X86_64_PC8: + *(unsigned char *) loc += v - dot; + break; + + case R_X86_64_GLOB_DAT: + case R_X86_64_JUMP_SLOT: + *loc = v; + break; + + case R_X86_64_RELATIVE: + *loc += f->baseaddr; + break; + + case R_X86_64_GOT32: + case R_X86_64_GOTPCREL: + goto bb_use_got; +# if 0 + if (!isym->gotent.reloc_done) + { + isym->gotent.reloc_done = 1; + *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v; + } + /* XXX are these really correct? */ + if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL) + *(unsigned int *) loc += v + isym->gotent.offset; + else + *loc += isym->gotent.offset; + break; +# endif + +#else +# warning "no idea how to handle relocations on your arch" +#endif + + default: + printf("Warning: unhandled reloc %d\n",(int)ELF_R_TYPE(rel->r_info)); + ret = obj_reloc_unhandled; + break; + +#if defined(USE_PLT_ENTRIES) + +bb_use_plt: + + /* find the plt entry and initialize it if necessary */ + +#if defined(USE_PLT_LIST) + for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;) + pe = pe->next; +#else + pe = &isym->pltent; +#endif + + if (! pe->inited) { + ip = (unsigned long *) (ifile->plt->contents + pe->offset); + + /* generate some machine code */ + +#if defined(__arm__) + ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */ + ip[1] = v; /* sym@ */ +#endif +#if defined(__powerpc__) + ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */ + ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */ + ip[2] = 0x7d6903a6; /* mtctr r11 */ + ip[3] = 0x4e800420; /* bctr */ +#endif +#if defined(__v850e__) + /* We have to trash a register, so we assume that any control + transfer more than 21-bits away must be a function call + (so we can use a call-clobbered register). */ + ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */ + ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */ +#endif + pe->inited = 1; + } + + /* relative distance to target */ + v -= dot; + /* if the target is too far away.... */ +#if defined(__arm__) || defined(__powerpc__) + if ((int)v < -0x02000000 || (int)v >= 0x02000000) +#elif defined(__v850e__) + if ((ElfW(Sword))v > 0x1fffff || (ElfW(Sword))v < (ElfW(Sword))-0x200000) +#endif + /* go via the plt */ + v = plt + pe->offset - dot; + +#if defined(__v850e__) + if (v & 1) +#else + if (v & 3) +#endif + ret = obj_reloc_dangerous; + + /* merge the offset into the instruction. */ +#if defined(__arm__) + /* Convert to words. */ + v >>= 2; + + *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff); +#endif +#if defined(__powerpc__) + *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc); +#endif +#if defined(__v850e__) + /* We write two shorts instead of a long because even 32-bit insns + only need half-word alignment, but the 32-bit data write needs + to be long-word aligned. */ + ((unsigned short *)loc)[0] = + (*(unsigned short *)loc & 0xffc0) /* opcode + reg */ + | ((v >> 16) & 0x3f); /* offs high part */ + ((unsigned short *)loc)[1] = + (v & 0xffff); /* offs low part */ +#endif + break; +#endif /* USE_PLT_ENTRIES */ + +#if defined(USE_GOT_ENTRIES) +bb_use_got: + + /* needs an entry in the .got: set it, once */ + if (!isym->gotent.inited) { + isym->gotent.inited = 1; + *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v; + } + /* make the reloc with_respect_to_.got */ +#if defined(__sh__) + *loc += isym->gotent.offset + rel->r_addend; +#elif defined(__i386__) || defined(__arm__) || defined(__mc68000__) + *loc += isym->gotent.offset; +#endif + break; + +#endif /* USE_GOT_ENTRIES */ + } + + return ret; +} + + +#if defined(USE_LIST) + +static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list, + int offset, int size) +{ + struct arch_list_entry *pe; + + for (pe = *list; pe != NULL; pe = pe->next) { + if (pe->addend == rel->r_addend) { + break; + } + } + + if (pe == NULL) { + pe = xmalloc(sizeof(struct arch_list_entry)); + pe->next = *list; + pe->addend = rel->r_addend; + pe->offset = offset; + pe->inited = 0; + *list = pe; + return size; + } + return 0; +} + +#endif + +#if defined(USE_SINGLE) + +static int arch_single_init(/*ElfW(RelM) *rel,*/ struct arch_single_entry *single, + int offset, int size) +{ + if (single->allocated == 0) { + single->allocated = 1; + single->offset = offset; + single->inited = 0; + return size; + } + return 0; +} + +#endif + +#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) + +static struct obj_section *arch_xsect_init(struct obj_file *f, const char *name, + int offset, int size) +{ + struct obj_section *myrelsec = obj_find_section(f, name); + + if (offset == 0) { + offset += size; + } + + if (myrelsec) { + obj_extend_section(myrelsec, offset); + } else { + myrelsec = obj_create_alloced_section(f, name, + size, offset); + } + + return myrelsec; +} + +#endif + +static void arch_create_got(struct obj_file *f) +{ +#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) + struct arch_file *ifile = (struct arch_file *) f; + int i; +#if defined(USE_GOT_ENTRIES) + int got_offset = 0, got_needed = 0, got_allocate; +#endif +#if defined(USE_PLT_ENTRIES) + int plt_offset = 0, plt_needed = 0, plt_allocate; +#endif + struct obj_section *relsec, *symsec, *strsec; + ElfW(RelM) *rel, *relend; + ElfW(Sym) *symtab, *extsym; + const char *strtab, *name; + struct arch_symbol *intsym; + + for (i = 0; i < f->header.e_shnum; ++i) { + relsec = f->sections[i]; + if (relsec->header.sh_type != SHT_RELM) + continue; + + symsec = f->sections[relsec->header.sh_link]; + strsec = f->sections[symsec->header.sh_link]; + + rel = (ElfW(RelM) *) relsec->contents; + relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); + symtab = (ElfW(Sym) *) symsec->contents; + strtab = (const char *) strsec->contents; + + for (; rel < relend; ++rel) { + extsym = &symtab[ELF_R_SYM(rel->r_info)]; + +#if defined(USE_GOT_ENTRIES) + got_allocate = 0; +#endif +#if defined(USE_PLT_ENTRIES) + plt_allocate = 0; +#endif + + switch (ELF_R_TYPE(rel->r_info)) { +#if defined(__arm__) + case R_ARM_PC24: + case R_ARM_PLT32: + plt_allocate = 1; + break; + + case R_ARM_GOTOFF: + case R_ARM_GOTPC: + got_needed = 1; + continue; + + case R_ARM_GOT32: + got_allocate = 1; + break; + +#elif defined(__i386__) + case R_386_GOTPC: + case R_386_GOTOFF: + got_needed = 1; + continue; + + case R_386_GOT32: + got_allocate = 1; + break; + +#elif defined(__powerpc__) + case R_PPC_REL24: + plt_allocate = 1; + break; + +#elif defined(__mc68000__) + case R_68K_GOT32: + got_allocate = 1; + break; + +#ifdef R_68K_GOTOFF + case R_68K_GOTOFF: + got_needed = 1; + continue; +#endif + +#elif defined(__sh__) + case R_SH_GOT32: + got_allocate = 1; + break; + + case R_SH_GOTPC: + case R_SH_GOTOFF: + got_needed = 1; + continue; + +#elif defined(__v850e__) + case R_V850_22_PCREL: + plt_needed = 1; + break; + +#endif + default: + continue; + } + + if (extsym->st_name != 0) { + name = strtab + extsym->st_name; + } else { + name = f->sections[extsym->st_shndx]->name; + } + intsym = (struct arch_symbol *) obj_find_symbol(f, name); +#if defined(USE_GOT_ENTRIES) + if (got_allocate) { + got_offset += arch_single_init( + /*rel,*/ &intsym->gotent, + got_offset, GOT_ENTRY_SIZE); + + got_needed = 1; + } +#endif +#if defined(USE_PLT_ENTRIES) + if (plt_allocate) { +#if defined(USE_PLT_LIST) + plt_offset += arch_list_add( + rel, &intsym->pltent, + plt_offset, PLT_ENTRY_SIZE); +#else + plt_offset += arch_single_init( + /*rel,*/ &intsym->pltent, + plt_offset, PLT_ENTRY_SIZE); +#endif + plt_needed = 1; + } +#endif + } + } + +#if defined(USE_GOT_ENTRIES) + if (got_needed) { + ifile->got = arch_xsect_init(f, ".got", got_offset, + GOT_ENTRY_SIZE); + } +#endif + +#if defined(USE_PLT_ENTRIES) + if (plt_needed) { + ifile->plt = arch_xsect_init(f, ".plt", plt_offset, + PLT_ENTRY_SIZE); + } +#endif + +#endif /* defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) */ +} + +/*======================================================================*/ + +/* Standard ELF hash function. */ +static unsigned long obj_elf_hash_n(const char *name, unsigned long n) +{ + unsigned long h = 0; + unsigned long g; + unsigned char ch; + + while (n > 0) { + ch = *name++; + h = (h << 4) + ch; + g = (h & 0xf0000000); + if (g != 0) { + h ^= g >> 24; + h &= ~g; + } + n--; + } + return h; +} + +static unsigned long obj_elf_hash(const char *name) +{ + return obj_elf_hash_n(name, strlen(name)); +} + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING +/* String comparison for non-co-versioned kernel and module. */ + +static int ncv_strcmp(const char *a, const char *b) +{ + size_t alen = strlen(a), blen = strlen(b); + + if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R') + return strncmp(a, b, alen); + else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R') + return strncmp(a, b, blen); + else + return strcmp(a, b); +} + +/* String hashing for non-co-versioned kernel and module. Here + we are simply forced to drop the crc from the hash. */ + +static unsigned long ncv_symbol_hash(const char *str) +{ + size_t len = strlen(str); + if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R') + len -= 10; + return obj_elf_hash_n(str, len); +} + +static void +obj_set_symbol_compare(struct obj_file *f, + int (*cmp) (const char *, const char *), + unsigned long (*hash) (const char *)) +{ + if (cmp) + f->symbol_cmp = cmp; + if (hash) { + struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next; + int i; + + f->symbol_hash = hash; + + memcpy(tmptab, f->symtab, sizeof(tmptab)); + memset(f->symtab, 0, sizeof(f->symtab)); + + for (i = 0; i < HASH_BUCKETS; ++i) + for (sym = tmptab[i]; sym; sym = next) { + unsigned long h = hash(sym->name) % HASH_BUCKETS; + next = sym->next; + sym->next = f->symtab[h]; + f->symtab[h] = sym; + } + } +} + +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ + +static struct obj_symbol * +obj_add_symbol(struct obj_file *f, const char *name, + unsigned long symidx, int info, + int secidx, ElfW(Addr) value, + unsigned long size) +{ + struct obj_symbol *sym; + unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; + int n_type = ELF_ST_TYPE(info); + int n_binding = ELF_ST_BIND(info); + + for (sym = f->symtab[hash]; sym; sym = sym->next) { + if (f->symbol_cmp(sym->name, name) == 0) { + int o_secidx = sym->secidx; + int o_info = sym->info; + int o_type = ELF_ST_TYPE(o_info); + int o_binding = ELF_ST_BIND(o_info); + + /* A redefinition! Is it legal? */ + + if (secidx == SHN_UNDEF) + return sym; + else if (o_secidx == SHN_UNDEF) + goto found; + else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) { + /* Cope with local and global symbols of the same name + in the same object file, as might have been created + by ld -r. The only reason locals are now seen at this + level at all is so that we can do semi-sensible things + with parameters. */ + + struct obj_symbol *nsym, **p; + + nsym = arch_new_symbol(); + nsym->next = sym->next; + nsym->ksymidx = -1; + + /* Excise the old (local) symbol from the hash chain. */ + for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next) + continue; + *p = sym = nsym; + goto found; + } else if (n_binding == STB_LOCAL) { + /* Another symbol of the same name has already been defined. + Just add this to the local table. */ + sym = arch_new_symbol(); + sym->next = NULL; + sym->ksymidx = -1; + f->local_symtab[symidx] = sym; + goto found; + } else if (n_binding == STB_WEAK) + return sym; + else if (o_binding == STB_WEAK) + goto found; + /* Don't unify COMMON symbols with object types the programmer + doesn't expect. */ + else if (secidx == SHN_COMMON + && (o_type == STT_NOTYPE || o_type == STT_OBJECT)) + return sym; + else if (o_secidx == SHN_COMMON + && (n_type == STT_NOTYPE || n_type == STT_OBJECT)) + goto found; + else { + /* Don't report an error if the symbol is coming from + the kernel or some external module. */ + if (secidx <= SHN_HIRESERVE) + bb_error_msg("%s multiply defined", name); + return sym; + } + } + } + + /* Completely new symbol. */ + sym = arch_new_symbol(); + sym->next = f->symtab[hash]; + f->symtab[hash] = sym; + sym->ksymidx = -1; + if (ELF_ST_BIND(info) == STB_LOCAL && symidx != (unsigned long)(-1)) { + if (symidx >= f->local_symtab_size) + bb_error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld", + name, (long) symidx, (long) f->local_symtab_size); + else + f->local_symtab[symidx] = sym; + } + +found: + sym->name = name; + sym->value = value; + sym->size = size; + sym->secidx = secidx; + sym->info = info; + + return sym; +} + +static struct obj_symbol * +obj_find_symbol(struct obj_file *f, const char *name) +{ + struct obj_symbol *sym; + unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; + + for (sym = f->symtab[hash]; sym; sym = sym->next) + if (f->symbol_cmp(sym->name, name) == 0) + return sym; + + return NULL; +} + +static ElfW(Addr) obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym) +{ + if (sym) { + if (sym->secidx >= SHN_LORESERVE) + return sym->value; + + return sym->value + f->sections[sym->secidx]->header.sh_addr; + } else { + /* As a special case, a NULL sym has value zero. */ + return 0; + } +} + +static struct obj_section *obj_find_section(struct obj_file *f, const char *name) +{ + int i, n = f->header.e_shnum; + + for (i = 0; i < n; ++i) + if (strcmp(f->sections[i]->name, name) == 0) + return f->sections[i]; + + return NULL; +} + +static int obj_load_order_prio(struct obj_section *a) +{ + unsigned long af, ac; + + af = a->header.sh_flags; + + ac = 0; + if (a->name[0] != '.' || strlen(a->name) != 10 || + strcmp(a->name + 5, ".init")) + ac |= 32; + if (af & SHF_ALLOC) + ac |= 16; + if (!(af & SHF_WRITE)) + ac |= 8; + if (af & SHF_EXECINSTR) + ac |= 4; + if (a->header.sh_type != SHT_NOBITS) + ac |= 2; + + return ac; +} + +static void +obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec) +{ + struct obj_section **p; + int prio = obj_load_order_prio(sec); + for (p = f->load_order_search_start; *p; p = &(*p)->load_next) + if (obj_load_order_prio(*p) < prio) + break; + sec->load_next = *p; + *p = sec; +} + +static struct obj_section *obj_create_alloced_section(struct obj_file *f, + const char *name, + unsigned long align, + unsigned long size) +{ + int newidx = f->header.e_shnum++; + struct obj_section *sec; + + f->sections = xrealloc_vector(f->sections, 2, newidx); + f->sections[newidx] = sec = arch_new_section(); + + sec->header.sh_type = SHT_PROGBITS; + sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; + sec->header.sh_size = size; + sec->header.sh_addralign = align; + sec->name = name; + sec->idx = newidx; + if (size) + sec->contents = xmalloc(size); + + obj_insert_section_load_order(f, sec); + + return sec; +} + +static struct obj_section *obj_create_alloced_section_first(struct obj_file *f, + const char *name, + unsigned long align, + unsigned long size) +{ + int newidx = f->header.e_shnum++; + struct obj_section *sec; + + f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec)); + f->sections[newidx] = sec = arch_new_section(); + + sec->header.sh_type = SHT_PROGBITS; + sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; + sec->header.sh_size = size; + sec->header.sh_addralign = align; + sec->name = name; + sec->idx = newidx; + if (size) + sec->contents = xmalloc(size); + + sec->load_next = f->load_order; + f->load_order = sec; + if (f->load_order_search_start == &f->load_order) + f->load_order_search_start = &sec->load_next; + + return sec; +} + +static void *obj_extend_section(struct obj_section *sec, unsigned long more) +{ + unsigned long oldsize = sec->header.sh_size; + if (more) { + sec->header.sh_size += more; + sec->contents = xrealloc(sec->contents, sec->header.sh_size); + } + return sec->contents + oldsize; +} + + +/* Conditionally add the symbols from the given symbol set to the + new module. */ + +static int +add_symbols_from( struct obj_file *f, + int idx, struct new_module_symbol *syms, size_t nsyms) +{ + struct new_module_symbol *s; + size_t i; + int used = 0; +#ifdef SYMBOL_PREFIX + char *name_buf = 0; + size_t name_alloced_size = 0; +#endif +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE + int gpl; + + gpl = obj_gpl_license(f, NULL) == 0; +#endif + for (i = 0, s = syms; i < nsyms; ++i, ++s) { + /* Only add symbols that are already marked external. + If we override locals we may cause problems for + argument initialization. We will also create a false + dependency on the module. */ + struct obj_symbol *sym; + char *name; + + /* GPL licensed modules can use symbols exported with + * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the + * exported names. Non-GPL modules never see any GPLONLY_ + * symbols so they cannot fudge it by adding the prefix on + * their references. + */ + if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) { +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE + if (gpl) + s->name += 8; + else +#endif + continue; + } + name = (char *)s->name; + +#ifdef SYMBOL_PREFIX + /* Prepend SYMBOL_PREFIX to the symbol's name (the + kernel exports `C names', but module object files + reference `linker names'). */ + size_t extra = sizeof SYMBOL_PREFIX; + size_t name_size = strlen(name) + extra; + if (name_size > name_alloced_size) { + name_alloced_size = name_size * 2; + name_buf = alloca(name_alloced_size); + } + strcpy(name_buf, SYMBOL_PREFIX); + strcpy(name_buf + extra - 1, name); + name = name_buf; +#endif /* SYMBOL_PREFIX */ + + sym = obj_find_symbol(f, name); + if (sym && !(ELF_ST_BIND(sym->info) == STB_LOCAL)) { +#ifdef SYMBOL_PREFIX + /* Put NAME_BUF into more permanent storage. */ + name = xmalloc(name_size); + strcpy(name, name_buf); +#endif + sym = obj_add_symbol(f, name, -1, + ELF_ST_INFO(STB_GLOBAL, + STT_NOTYPE), + idx, s->value, 0); + /* Did our symbol just get installed? If so, mark the + module as "used". */ + if (sym->secidx == idx) + used = 1; + } + } + + return used; +} + +static void add_kernel_symbols(struct obj_file *f) +{ + struct external_module *m; + int i, nused = 0; + + /* Add module symbols first. */ + + for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) { + if (m->nsyms + && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, m->nsyms) + ) { + m->used = 1; + ++nused; + } + } + + n_ext_modules_used = nused; + + /* And finally the symbols from the kernel proper. */ + + if (nksyms) + add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms); +} + +static char *get_modinfo_value(struct obj_file *f, const char *key) +{ + struct obj_section *sec; + char *p, *v, *n, *ep; + size_t klen = strlen(key); + + sec = obj_find_section(f, ".modinfo"); + if (sec == NULL) + return NULL; + p = sec->contents; + ep = p + sec->header.sh_size; + while (p < ep) { + v = strchr(p, '='); + n = strchr(p, '\0'); + if (v) { + if (p + klen == v && strncmp(p, key, klen) == 0) + return v + 1; + } else { + if (p + klen == n && strcmp(p, key) == 0) + return n; + } + p = n + 1; + } + + return NULL; +} + + +/*======================================================================*/ +/* Functions relating to module loading after 2.1.18. */ + +/* From Linux-2.6 sources */ +/* You can use " around spaces, but can't escape ". */ +/* Hyphens and underscores equivalent in parameter names. */ +static char *next_arg(char *args, char **param, char **val) +{ + unsigned int i, equals = 0; + int in_quote = 0, quoted = 0; + char *next; + + if (*args == '"') { + args++; + in_quote = 1; + quoted = 1; + } + + for (i = 0; args[i]; i++) { + if (args[i] == ' ' && !in_quote) + break; + if (equals == 0) { + if (args[i] == '=') + equals = i; + } + if (args[i] == '"') + in_quote = !in_quote; + } + + *param = args; + if (!equals) + *val = NULL; + else { + args[equals] = '\0'; + *val = args + equals + 1; + + /* Don't include quotes in value. */ + if (**val == '"') { + (*val)++; + if (args[i-1] == '"') + args[i-1] = '\0'; + } + if (quoted && args[i-1] == '"') + args[i-1] = '\0'; + } + + if (args[i]) { + args[i] = '\0'; + next = args + i + 1; + } else + next = args + i; + + /* Chew up trailing spaces. */ + return skip_whitespace(next); +} + +static void +new_process_module_arguments(struct obj_file *f, const char *options) +{ + char *xoptions, *pos; + char *param, *val; + + xoptions = pos = xstrdup(skip_whitespace(options)); + while (*pos) { + unsigned long charssize = 0; + char *tmp, *contents, *loc, *pinfo, *p; + struct obj_symbol *sym; + int min, max, n, len; + + pos = next_arg(pos, ¶m, &val); + + tmp = xasprintf("parm_%s", param); + pinfo = get_modinfo_value(f, tmp); + free(tmp); + if (pinfo == NULL) + bb_error_msg_and_die("invalid parameter %s", param); + +#ifdef SYMBOL_PREFIX + tmp = xasprintf(SYMBOL_PREFIX "%s", param); + sym = obj_find_symbol(f, tmp); + free(tmp); +#else + sym = obj_find_symbol(f, param); +#endif + + /* Also check that the parameter was not resolved from the kernel. */ + if (sym == NULL || sym->secidx > SHN_HIRESERVE) + bb_error_msg_and_die("symbol for parameter %s not found", param); + + /* Number of parameters */ + if (isdigit(*pinfo)) { + min = strtoul(pinfo, &pinfo, 10); + if (*pinfo == '-') + max = strtoul(pinfo + 1, &pinfo, 10); + else + max = min; + } else + min = max = 1; + + contents = f->sections[sym->secidx]->contents; + loc = contents + sym->value; + + if (*pinfo == 'c') { + if (!isdigit(*(pinfo + 1))) { + bb_error_msg_and_die("parameter type 'c' for %s must be followed by" + " the maximum size", param); + } + charssize = strtoul(pinfo + 1, (char **) NULL, 10); + } + + if (val == NULL) { + if (*pinfo != 'b') + bb_error_msg_and_die("argument expected for parameter %s", param); + val = (char *) "1"; + } + + /* Parse parameter values */ + n = 0; + p = val; + while (*p != 0) { + if (++n > max) + bb_error_msg_and_die("too many values for %s (max %d)", param, max); + + switch (*pinfo) { + case 's': + len = strcspn(p, ","); + p[len] = 0; + obj_string_patch(f, sym->secidx, + loc - contents, p); + loc += tgt_sizeof_char_p; + p += len; + break; + case 'c': + len = strcspn(p, ","); + p[len] = 0; + if (len >= charssize) + bb_error_msg_and_die("string too long for %s (max %ld)", param, + charssize - 1); + strcpy((char *) loc, p); + loc += charssize; + p += len; + break; + case 'b': + *loc++ = strtoul(p, &p, 0); + break; + case 'h': + *(short *) loc = strtoul(p, &p, 0); + loc += tgt_sizeof_short; + break; + case 'i': + *(int *) loc = strtoul(p, &p, 0); + loc += tgt_sizeof_int; + break; + case 'l': + *(long *) loc = strtoul(p, &p, 0); + loc += tgt_sizeof_long; + break; + default: + bb_error_msg_and_die("unknown parameter type '%c' for %s", + *pinfo, param); + } + + p = skip_whitespace(p); + if (*p != ',') + break; + p = skip_whitespace(p + 1); + } + + if (n < min) + bb_error_msg_and_die("parameter %s requires at least %d arguments", param, min); + if (*p != '\0') + bb_error_msg_and_die("invalid argument syntax for %s", param); + } + + free(xoptions); +} + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING +static int new_is_module_checksummed(struct obj_file *f) +{ + const char *p = get_modinfo_value(f, "using_checksums"); + if (p) + return xatoi(p); + return 0; +} + +/* Get the module's kernel version in the canonical integer form. */ + +static int +new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) +{ + char *p, *q; + int a, b, c; + + p = get_modinfo_value(f, "kernel_version"); + if (p == NULL) + return -1; + safe_strncpy(str, p, STRVERSIONLEN); + + a = strtoul(p, &p, 10); + if (*p != '.') + return -1; + b = strtoul(p + 1, &p, 10); + if (*p != '.') + return -1; + c = strtoul(p + 1, &q, 10); + if (p + 1 == q) + return -1; + + return a << 16 | b << 8 | c; +} + +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ + + +/* Fetch the loaded modules, and all currently exported symbols. */ + +static void new_get_kernel_symbols(void) +{ + char *module_names, *mn; + struct external_module *modules, *m; + struct new_module_symbol *syms, *s; + size_t ret, bufsize, nmod, nsyms, i, j; + + /* Collect the loaded modules. */ + + bufsize = 256; + module_names = xmalloc(bufsize); + + retry_modules_load: + if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) { + if (errno == ENOSPC && bufsize < ret) { + bufsize = ret; + module_names = xrealloc(module_names, bufsize); + goto retry_modules_load; + } + bb_perror_msg_and_die("QM_MODULES"); + } + + n_ext_modules = nmod = ret; + + /* Collect the modules' symbols. */ + + if (nmod) { + ext_modules = modules = xmalloc(nmod * sizeof(*modules)); + memset(modules, 0, nmod * sizeof(*modules)); + for (i = 0, mn = module_names, m = modules; + i < nmod; ++i, ++m, mn += strlen(mn) + 1) { + struct new_module_info info; + + if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) { + if (errno == ENOENT) { + /* The module was removed out from underneath us. */ + continue; + } + bb_perror_msg_and_die("query_module: QM_INFO: %s", mn); + } + + bufsize = 1024; + syms = xmalloc(bufsize); + retry_mod_sym_load: + if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) { + switch (errno) { + case ENOSPC: + bufsize = ret; + syms = xrealloc(syms, bufsize); + goto retry_mod_sym_load; + case ENOENT: + /* The module was removed out from underneath us. */ + continue; + default: + bb_perror_msg_and_die("query_module: QM_SYMBOLS: %s", mn); + } + } + nsyms = ret; + + m->name = mn; + m->addr = info.addr; + m->nsyms = nsyms; + m->syms = syms; + + for (j = 0, s = syms; j < nsyms; ++j, ++s) { + s->name += (unsigned long) syms; + } + } + } + + /* Collect the kernel's symbols. */ + + syms = xmalloc(bufsize = 16 * 1024); + retry_kern_sym_load: + if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) { + if (errno == ENOSPC && bufsize < ret) { + bufsize = ret; + syms = xrealloc(syms, bufsize); + goto retry_kern_sym_load; + } + bb_perror_msg_and_die("kernel: QM_SYMBOLS"); + } + nksyms = nsyms = ret; + ksyms = syms; + + for (j = 0, s = syms; j < nsyms; ++j, ++s) { + s->name += (unsigned long) syms; + } +} + + +/* Return the kernel symbol checksum version, or zero if not used. */ + +static int new_is_kernel_checksummed(void) +{ + struct new_module_symbol *s; + size_t i; + + /* Using_Versions is not the first symbol, but it should be in there. */ + + for (i = 0, s = ksyms; i < nksyms; ++i, ++s) + if (strcmp((char *) s->name, "Using_Versions") == 0) + return s->value; + + return 0; +} + + +static void new_create_this_module(struct obj_file *f, const char *m_name) +{ + struct obj_section *sec; + + sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long, + sizeof(struct new_module)); + memset(sec->contents, 0, sizeof(struct new_module)); + + obj_add_symbol(f, SPFX "__this_module", -1, + ELF_ST_INFO(STB_LOCAL, STT_OBJECT), sec->idx, 0, + sizeof(struct new_module)); + + obj_string_patch(f, sec->idx, offsetof(struct new_module, name), + m_name); +} + +#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS +/* add an entry to the __ksymtab section, creating it if necessary */ +static void new_add_ksymtab(struct obj_file *f, struct obj_symbol *sym) +{ + struct obj_section *sec; + ElfW(Addr) ofs; + + /* ensure __ksymtab is allocated, EXPORT_NOSYMBOLS creates a non-alloc section. + * If __ksymtab is defined but not marked alloc, x out the first character + * (no obj_delete routine) and create a new __ksymtab with the correct + * characteristics. + */ + sec = obj_find_section(f, "__ksymtab"); + if (sec && !(sec->header.sh_flags & SHF_ALLOC)) { + *((char *)(sec->name)) = 'x'; /* override const */ + sec = NULL; + } + if (!sec) + sec = obj_create_alloced_section(f, "__ksymtab", + tgt_sizeof_void_p, 0); + if (!sec) + return; + sec->header.sh_flags |= SHF_ALLOC; + /* Empty section might be byte-aligned */ + sec->header.sh_addralign = tgt_sizeof_void_p; + ofs = sec->header.sh_size; + obj_symbol_patch(f, sec->idx, ofs, sym); + obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, sym->name); + obj_extend_section(sec, 2 * tgt_sizeof_char_p); +} +#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ + +static int new_create_module_ksymtab(struct obj_file *f) +{ + struct obj_section *sec; + int i; + + /* We must always add the module references. */ + + if (n_ext_modules_used) { + struct new_module_ref *dep; + struct obj_symbol *tm; + + sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p, + (sizeof(struct new_module_ref) + * n_ext_modules_used)); + if (!sec) + return 0; + + tm = obj_find_symbol(f, SPFX "__this_module"); + dep = (struct new_module_ref *) sec->contents; + for (i = 0; i < n_ext_modules; ++i) + if (ext_modules[i].used) { + dep->dep = ext_modules[i].addr; + obj_symbol_patch(f, sec->idx, + (char *) &dep->ref - sec->contents, tm); + dep->next_ref = 0; + ++dep; + } + } + + if (!flag_noexport && !obj_find_section(f, "__ksymtab")) { + size_t nsyms; + int *loaded; + + sec = obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, 0); + + /* We don't want to export symbols residing in sections that + aren't loaded. There are a number of these created so that + we make sure certain module options don't appear twice. */ + + loaded = alloca(sizeof(int) * (i = f->header.e_shnum)); + while (--i >= 0) + loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0; + + for (nsyms = i = 0; i < HASH_BUCKETS; ++i) { + struct obj_symbol *sym; + for (sym = f->symtab[i]; sym; sym = sym->next) + if (ELF_ST_BIND(sym->info) != STB_LOCAL + && sym->secidx <= SHN_HIRESERVE + && (sym->secidx >= SHN_LORESERVE + || loaded[sym->secidx])) { + ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p; + + obj_symbol_patch(f, sec->idx, ofs, sym); + obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, + sym->name); + + nsyms++; + } + } + + obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p); + } + + return 1; +} + + +static int +new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size) +{ + struct new_module *module; + struct obj_section *sec; + void *image; + int ret; + tgt_long m_addr; + + sec = obj_find_section(f, ".this"); + if (!sec || !sec->contents) { + bb_perror_msg_and_die("corrupt module %s?", m_name); + } + module = (struct new_module *) sec->contents; + m_addr = sec->header.sh_addr; + + module->size_of_struct = sizeof(*module); + module->size = m_size; + module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0; + + sec = obj_find_section(f, "__ksymtab"); + if (sec && sec->header.sh_size) { + module->syms = sec->header.sh_addr; + module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p); + } + + if (n_ext_modules_used) { + sec = obj_find_section(f, ".kmodtab"); + module->deps = sec->header.sh_addr; + module->ndeps = n_ext_modules_used; + } + + module->init = + obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module")); + module->cleanup = + obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module")); + + sec = obj_find_section(f, "__ex_table"); + if (sec) { + module->ex_table_start = sec->header.sh_addr; + module->ex_table_end = sec->header.sh_addr + sec->header.sh_size; + } + + sec = obj_find_section(f, ".text.init"); + if (sec) { + module->runsize = sec->header.sh_addr - m_addr; + } + sec = obj_find_section(f, ".data.init"); + if (sec) { + if (!module->runsize || + module->runsize > sec->header.sh_addr - m_addr) + module->runsize = sec->header.sh_addr - m_addr; + } + sec = obj_find_section(f, ARCHDATA_SEC_NAME); + if (sec && sec->header.sh_size) { + module->archdata_start = (void*)sec->header.sh_addr; + module->archdata_end = module->archdata_start + sec->header.sh_size; + } + sec = obj_find_section(f, KALLSYMS_SEC_NAME); + if (sec && sec->header.sh_size) { + module->kallsyms_start = (void*)sec->header.sh_addr; + module->kallsyms_end = module->kallsyms_start + sec->header.sh_size; + } + + /* Whew! All of the initialization is complete. Collect the final + module image and give it to the kernel. */ + + image = xmalloc(m_size); + obj_create_image(f, image); + + ret = init_module(m_name, (struct new_module *) image); + if (ret) + bb_perror_msg("init_module: %s", m_name); + + free(image); + + return ret == 0; +} + + +/*======================================================================*/ + +static void +obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, + const char *string) +{ + struct obj_string_patch *p; + struct obj_section *strsec; + size_t len = strlen(string) + 1; + char *loc; + + p = xmalloc(sizeof(*p)); + p->next = f->string_patches; + p->reloc_secidx = secidx; + p->reloc_offset = offset; + f->string_patches = p; + + strsec = obj_find_section(f, ".kstrtab"); + if (strsec == NULL) { + strsec = obj_create_alloced_section(f, ".kstrtab", 1, len); + p->string_offset = 0; + loc = strsec->contents; + } else { + p->string_offset = strsec->header.sh_size; + loc = obj_extend_section(strsec, len); + } + memcpy(loc, string, len); +} + +static void +obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, + struct obj_symbol *sym) +{ + struct obj_symbol_patch *p; + + p = xmalloc(sizeof(*p)); + p->next = f->symbol_patches; + p->reloc_secidx = secidx; + p->reloc_offset = offset; + p->sym = sym; + f->symbol_patches = p; +} + +static void obj_check_undefineds(struct obj_file *f) +{ + unsigned i; + + for (i = 0; i < HASH_BUCKETS; ++i) { + struct obj_symbol *sym; + for (sym = f->symtab[i]; sym; sym = sym->next) + if (sym->secidx == SHN_UNDEF) { + if (ELF_ST_BIND(sym->info) == STB_WEAK) { + sym->secidx = SHN_ABS; + sym->value = 0; + } else { + if (!flag_quiet) + bb_error_msg_and_die("unresolved symbol %s", sym->name); + } + } + } +} + +static void obj_allocate_commons(struct obj_file *f) +{ + struct common_entry { + struct common_entry *next; + struct obj_symbol *sym; + } *common_head = NULL; + + unsigned long i; + + for (i = 0; i < HASH_BUCKETS; ++i) { + struct obj_symbol *sym; + for (sym = f->symtab[i]; sym; sym = sym->next) + if (sym->secidx == SHN_COMMON) { + /* Collect all COMMON symbols and sort them by size so as to + minimize space wasted by alignment requirements. */ + { + struct common_entry **p, *n; + for (p = &common_head; *p; p = &(*p)->next) + if (sym->size <= (*p)->sym->size) + break; + + n = alloca(sizeof(*n)); + n->next = *p; + n->sym = sym; + *p = n; + } + } + } + + for (i = 1; i < f->local_symtab_size; ++i) { + struct obj_symbol *sym = f->local_symtab[i]; + if (sym && sym->secidx == SHN_COMMON) { + struct common_entry **p, *n; + for (p = &common_head; *p; p = &(*p)->next) + if (sym == (*p)->sym) + break; + else if (sym->size < (*p)->sym->size) { + n = alloca(sizeof(*n)); + n->next = *p; + n->sym = sym; + *p = n; + break; + } + } + } + + if (common_head) { + /* Find the bss section. */ + for (i = 0; i < f->header.e_shnum; ++i) + if (f->sections[i]->header.sh_type == SHT_NOBITS) + break; + + /* If for some reason there hadn't been one, create one. */ + if (i == f->header.e_shnum) { + struct obj_section *sec; + + f->sections = xrealloc_vector(f->sections, 2, i); + f->sections[i] = sec = arch_new_section(); + f->header.e_shnum = i + 1; + + sec->header.sh_type = SHT_PROGBITS; + sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; + sec->name = ".bss"; + sec->idx = i; + } + + /* Allocate the COMMONS. */ + { + ElfW(Addr) bss_size = f->sections[i]->header.sh_size; + ElfW(Addr) max_align = f->sections[i]->header.sh_addralign; + struct common_entry *c; + + for (c = common_head; c; c = c->next) { + ElfW(Addr) align = c->sym->value; + + if (align > max_align) + max_align = align; + if (bss_size & (align - 1)) + bss_size = (bss_size | (align - 1)) + 1; + + c->sym->secidx = i; + c->sym->value = bss_size; + + bss_size += c->sym->size; + } + + f->sections[i]->header.sh_size = bss_size; + f->sections[i]->header.sh_addralign = max_align; + } + } + + /* For the sake of patch relocation and parameter initialization, + allocate zeroed data for NOBITS sections now. Note that after + this we cannot assume NOBITS are really empty. */ + for (i = 0; i < f->header.e_shnum; ++i) { + struct obj_section *s = f->sections[i]; + if (s->header.sh_type == SHT_NOBITS) { + if (s->header.sh_size != 0) + s->contents = memset(xmalloc(s->header.sh_size), + 0, s->header.sh_size); + else + s->contents = NULL; + + s->header.sh_type = SHT_PROGBITS; + } + } +} + +static unsigned long obj_load_size(struct obj_file *f) +{ + unsigned long dot = 0; + struct obj_section *sec; + + /* Finalize the positions of the sections relative to one another. */ + + for (sec = f->load_order; sec; sec = sec->load_next) { + ElfW(Addr) align; + + align = sec->header.sh_addralign; + if (align && (dot & (align - 1))) + dot = (dot | (align - 1)) + 1; + + sec->header.sh_addr = dot; + dot += sec->header.sh_size; + } + + return dot; +} + +static int obj_relocate(struct obj_file *f, ElfW(Addr) base) +{ + int i, n = f->header.e_shnum; + int ret = 1; + + /* Finalize the addresses of the sections. */ + + f->baseaddr = base; + for (i = 0; i < n; ++i) + f->sections[i]->header.sh_addr += base; + + /* And iterate over all of the relocations. */ + + for (i = 0; i < n; ++i) { + struct obj_section *relsec, *symsec, *targsec, *strsec; + ElfW(RelM) * rel, *relend; + ElfW(Sym) * symtab; + const char *strtab; + + relsec = f->sections[i]; + if (relsec->header.sh_type != SHT_RELM) + continue; + + symsec = f->sections[relsec->header.sh_link]; + targsec = f->sections[relsec->header.sh_info]; + strsec = f->sections[symsec->header.sh_link]; + + rel = (ElfW(RelM) *) relsec->contents; + relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); + symtab = (ElfW(Sym) *) symsec->contents; + strtab = (const char *) strsec->contents; + + for (; rel < relend; ++rel) { + ElfW(Addr) value = 0; + struct obj_symbol *intsym = NULL; + unsigned long symndx; + ElfW(Sym) * extsym = 0; + const char *errmsg; + + /* Attempt to find a value to use for this relocation. */ + + symndx = ELF_R_SYM(rel->r_info); + if (symndx) { + /* Note we've already checked for undefined symbols. */ + + extsym = &symtab[symndx]; + if (ELF_ST_BIND(extsym->st_info) == STB_LOCAL) { + /* Local symbols we look up in the local table to be sure + we get the one that is really intended. */ + intsym = f->local_symtab[symndx]; + } else { + /* Others we look up in the hash table. */ + const char *name; + if (extsym->st_name) + name = strtab + extsym->st_name; + else + name = f->sections[extsym->st_shndx]->name; + intsym = obj_find_symbol(f, name); + } + + value = obj_symbol_final_value(f, intsym); + intsym->referenced = 1; + } +#if SHT_RELM == SHT_RELA +#if defined(__alpha__) && defined(AXP_BROKEN_GAS) + /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */ + if (!extsym || !extsym->st_name || + ELF_ST_BIND(extsym->st_info) != STB_LOCAL) +#endif + value += rel->r_addend; +#endif + + /* Do it! */ + switch (arch_apply_relocation + (f, targsec, /*symsec,*/ intsym, rel, value) + ) { + case obj_reloc_ok: + break; + + case obj_reloc_overflow: + errmsg = "Relocation overflow"; + goto bad_reloc; + case obj_reloc_dangerous: + errmsg = "Dangerous relocation"; + goto bad_reloc; + case obj_reloc_unhandled: + errmsg = "Unhandled relocation"; +bad_reloc: + if (extsym) { + bb_error_msg("%s of type %ld for %s", errmsg, + (long) ELF_R_TYPE(rel->r_info), + strtab + extsym->st_name); + } else { + bb_error_msg("%s of type %ld", errmsg, + (long) ELF_R_TYPE(rel->r_info)); + } + ret = 0; + break; + } + } + } + + /* Finally, take care of the patches. */ + + if (f->string_patches) { + struct obj_string_patch *p; + struct obj_section *strsec; + ElfW(Addr) strsec_base; + strsec = obj_find_section(f, ".kstrtab"); + strsec_base = strsec->header.sh_addr; + + for (p = f->string_patches; p; p = p->next) { + struct obj_section *targsec = f->sections[p->reloc_secidx]; + *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) + = strsec_base + p->string_offset; + } + } + + if (f->symbol_patches) { + struct obj_symbol_patch *p; + + for (p = f->symbol_patches; p; p = p->next) { + struct obj_section *targsec = f->sections[p->reloc_secidx]; + *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) + = obj_symbol_final_value(f, p->sym); + } + } + + return ret; +} + +static int obj_create_image(struct obj_file *f, char *image) +{ + struct obj_section *sec; + ElfW(Addr) base = f->baseaddr; + + for (sec = f->load_order; sec; sec = sec->load_next) { + char *secimg; + + if (sec->contents == 0 || sec->header.sh_size == 0) + continue; + + secimg = image + (sec->header.sh_addr - base); + + /* Note that we allocated data for NOBITS sections earlier. */ + memcpy(secimg, sec->contents, sec->header.sh_size); + } + + return 1; +} + +/*======================================================================*/ + +static struct obj_file *obj_load(FILE *fp, int loadprogbits UNUSED_PARAM) +{ + struct obj_file *f; + ElfW(Shdr) * section_headers; + size_t shnum, i; + char *shstrtab; + + /* Read the file header. */ + + f = arch_new_file(); + f->symbol_cmp = strcmp; + f->symbol_hash = obj_elf_hash; + f->load_order_search_start = &f->load_order; + + fseek(fp, 0, SEEK_SET); + if (fread(&f->header, sizeof(f->header), 1, fp) != 1) { + bb_perror_msg_and_die("error reading ELF header"); + } + + if (f->header.e_ident[EI_MAG0] != ELFMAG0 + || f->header.e_ident[EI_MAG1] != ELFMAG1 + || f->header.e_ident[EI_MAG2] != ELFMAG2 + || f->header.e_ident[EI_MAG3] != ELFMAG3) { + bb_error_msg_and_die("not an ELF file"); + } + if (f->header.e_ident[EI_CLASS] != ELFCLASSM + || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN + ? ELFDATA2MSB : ELFDATA2LSB) + || f->header.e_ident[EI_VERSION] != EV_CURRENT + || !MATCH_MACHINE(f->header.e_machine)) { + bb_error_msg_and_die("ELF file not for this architecture"); + } + if (f->header.e_type != ET_REL) { + bb_error_msg_and_die("ELF file not a relocatable object"); + } + + /* Read the section headers. */ + + if (f->header.e_shentsize != sizeof(ElfW(Shdr))) { + bb_error_msg_and_die("section header size mismatch: %lu != %lu", + (unsigned long) f->header.e_shentsize, + (unsigned long) sizeof(ElfW(Shdr))); + } + + shnum = f->header.e_shnum; + f->sections = xmalloc(sizeof(struct obj_section *) * shnum); + memset(f->sections, 0, sizeof(struct obj_section *) * shnum); + + section_headers = alloca(sizeof(ElfW(Shdr)) * shnum); + fseek(fp, f->header.e_shoff, SEEK_SET); + if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) { + bb_perror_msg_and_die("error reading ELF section headers"); + } + + /* Read the section data. */ + + for (i = 0; i < shnum; ++i) { + struct obj_section *sec; + + f->sections[i] = sec = arch_new_section(); + + sec->header = section_headers[i]; + sec->idx = i; + + if (sec->header.sh_size) { + switch (sec->header.sh_type) { + case SHT_NULL: + case SHT_NOTE: + case SHT_NOBITS: + /* ignore */ + break; + + case SHT_PROGBITS: +#if LOADBITS + if (!loadprogbits) { + sec->contents = NULL; + break; + } +#endif + case SHT_SYMTAB: + case SHT_STRTAB: + case SHT_RELM: + if (sec->header.sh_size > 0) { + sec->contents = xmalloc(sec->header.sh_size); + fseek(fp, sec->header.sh_offset, SEEK_SET); + if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) { + bb_perror_msg_and_die("error reading ELF section data"); + } + } else { + sec->contents = NULL; + } + break; + +#if SHT_RELM == SHT_REL + case SHT_RELA: + bb_error_msg_and_die("RELA relocations not supported on this architecture"); +#else + case SHT_REL: + bb_error_msg_and_die("REL relocations not supported on this architecture"); +#endif + default: + if (sec->header.sh_type >= SHT_LOPROC) { + /* Assume processor specific section types are debug + info and can safely be ignored. If this is ever not + the case (Hello MIPS?), don't put ifdefs here but + create an arch_load_proc_section(). */ + break; + } + + bb_error_msg_and_die("can't handle sections of type %ld", + (long) sec->header.sh_type); + } + } + } + + /* Do what sort of interpretation as needed by each section. */ + + shstrtab = f->sections[f->header.e_shstrndx]->contents; + + for (i = 0; i < shnum; ++i) { + struct obj_section *sec = f->sections[i]; + sec->name = shstrtab + sec->header.sh_name; + } + + for (i = 0; i < shnum; ++i) { + struct obj_section *sec = f->sections[i]; + + /* .modinfo should be contents only but gcc has no attribute for that. + * The kernel may have marked .modinfo as ALLOC, ignore this bit. + */ + if (strcmp(sec->name, ".modinfo") == 0) + sec->header.sh_flags &= ~SHF_ALLOC; + + if (sec->header.sh_flags & SHF_ALLOC) + obj_insert_section_load_order(f, sec); + + switch (sec->header.sh_type) { + case SHT_SYMTAB: + { + unsigned long nsym, j; + char *strtab; + ElfW(Sym) * sym; + + if (sec->header.sh_entsize != sizeof(ElfW(Sym))) { + bb_error_msg_and_die("symbol size mismatch: %lu != %lu", + (unsigned long) sec->header.sh_entsize, + (unsigned long) sizeof(ElfW(Sym))); + } + + nsym = sec->header.sh_size / sizeof(ElfW(Sym)); + strtab = f->sections[sec->header.sh_link]->contents; + sym = (ElfW(Sym) *) sec->contents; + + /* Allocate space for a table of local symbols. */ + j = f->local_symtab_size = sec->header.sh_info; + f->local_symtab = xzalloc(j * sizeof(struct obj_symbol *)); + + /* Insert all symbols into the hash table. */ + for (j = 1, ++sym; j < nsym; ++j, ++sym) { + ElfW(Addr) val = sym->st_value; + const char *name; + if (sym->st_name) + name = strtab + sym->st_name; + else if (sym->st_shndx < shnum) + name = f->sections[sym->st_shndx]->name; + else + continue; +#if defined(__SH5__) + /* + * For sh64 it is possible that the target of a branch + * requires a mode switch (32 to 16 and back again). + * + * This is implied by the lsb being set in the target + * address for SHmedia mode and clear for SHcompact. + */ + val |= sym->st_other & 4; +#endif + obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx, + val, sym->st_size); + } + } + break; + + case SHT_RELM: + if (sec->header.sh_entsize != sizeof(ElfW(RelM))) { + bb_error_msg_and_die("relocation entry size mismatch: %lu != %lu", + (unsigned long) sec->header.sh_entsize, + (unsigned long) sizeof(ElfW(RelM))); + } + break; + /* XXX Relocation code from modutils-2.3.19 is not here. + * Why? That's about 20 lines of code from obj/obj_load.c, + * which gets done in a second pass through the sections. + * This BusyBox insmod does similar work in obj_relocate(). */ + } + } + + return f; +} + +#if ENABLE_FEATURE_INSMOD_LOADINKMEM +/* + * load the unloaded sections directly into the memory allocated by + * kernel for the module + */ + +static int obj_load_progbits(FILE *fp, struct obj_file *f, char *imagebase) +{ + ElfW(Addr) base = f->baseaddr; + struct obj_section* sec; + + for (sec = f->load_order; sec; sec = sec->load_next) { + + /* section already loaded? */ + if (sec->contents != NULL) + continue; + + if (sec->header.sh_size == 0) + continue; + + sec->contents = imagebase + (sec->header.sh_addr - base); + fseek(fp, sec->header.sh_offset, SEEK_SET); + if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) { + bb_perror_msg("error reading ELF section data"); + return 0; + } + + } + return 1; +} +#endif + +static void hide_special_symbols(struct obj_file *f) +{ + static const char *const specials[] = { + SPFX "cleanup_module", + SPFX "init_module", + SPFX "kernel_version", + NULL + }; + + struct obj_symbol *sym; + const char *const *p; + + for (p = specials; *p; ++p) { + sym = obj_find_symbol(f, *p); + if (sym != NULL) + sym->info = ELF_ST_INFO(STB_LOCAL, ELF_ST_TYPE(sym->info)); + } +} + + +#if ENABLE_FEATURE_CHECK_TAINTED_MODULE +static int obj_gpl_license(struct obj_file *f, const char **license) +{ + struct obj_section *sec; + /* This list must match *exactly* the list of allowable licenses in + * linux/include/linux/module.h. Checking for leading "GPL" will not + * work, somebody will use "GPL sucks, this is proprietary". + */ + static const char *const gpl_licenses[] = { + "GPL", + "GPL v2", + "GPL and additional rights", + "Dual BSD/GPL", + "Dual MPL/GPL" + }; + + sec = obj_find_section(f, ".modinfo"); + if (sec) { + const char *value, *ptr, *endptr; + ptr = sec->contents; + endptr = ptr + sec->header.sh_size; + while (ptr < endptr) { + value = strchr(ptr, '='); + if (value && strncmp(ptr, "license", value-ptr) == 0) { + unsigned i; + if (license) + *license = value+1; + for (i = 0; i < ARRAY_SIZE(gpl_licenses); ++i) { + if (strcmp(value+1, gpl_licenses[i]) == 0) + return 0; + } + return 2; + } + ptr = strchr(ptr, '\0'); + if (ptr) + ptr++; + else + ptr = endptr; + } + } + return 1; +} + +#define TAINT_FILENAME "/proc/sys/kernel/tainted" +#define TAINT_PROPRIETORY_MODULE (1 << 0) +#define TAINT_FORCED_MODULE (1 << 1) +#define TAINT_UNSAFE_SMP (1 << 2) +#define TAINT_URL "http://www.tux.org/lkml/#export-tainted" + +static void set_tainted(int fd, const char *m_name, + int kernel_has_tainted, int taint, const char *text1, const char *text2) +{ + static smallint printed_info; + + char buf[80]; + int oldval; + + if (fd < 0 && !kernel_has_tainted) + return; /* New modutils on old kernel */ + printf("Warning: loading %s will taint the kernel: %s%s\n", + m_name, text1, text2); + if (!printed_info) { + printf(" See %s for information about tainted modules\n", TAINT_URL); + printed_info = 1; + } + if (fd >= 0) { + read(fd, buf, sizeof(buf)-1); + buf[sizeof(buf)-1] = '\0'; + oldval = strtoul(buf, NULL, 10); + sprintf(buf, "%d\n", oldval | taint); + write(fd, buf, strlen(buf)); + } +} + +/* Check if loading this module will taint the kernel. */ +static void check_tainted_module(struct obj_file *f, const char *m_name) +{ + static const char tainted_file[] ALIGN1 = TAINT_FILENAME; + + int fd, kernel_has_tainted; + const char *ptr; + + kernel_has_tainted = 1; + fd = open(tainted_file, O_RDWR); + if (fd < 0) { + if (errno == ENOENT) + kernel_has_tainted = 0; + else if (errno == EACCES) + kernel_has_tainted = 1; + else { + perror(tainted_file); + kernel_has_tainted = 0; + } + } + + switch (obj_gpl_license(f, &ptr)) { + case 0: + break; + case 1: + set_tainted(fd, m_name, kernel_has_tainted, TAINT_PROPRIETORY_MODULE, "no license", ""); + break; + case 2: + /* The module has a non-GPL license so we pretend that the + * kernel always has a taint flag to get a warning even on + * kernels without the proc flag. + */ + set_tainted(fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "non-GPL license - ", ptr); + break; + default: + set_tainted(fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "Unexpected return from obj_gpl_license", ""); + break; + } + + if (flag_force_load) + set_tainted(fd, m_name, 1, TAINT_FORCED_MODULE, "forced load", ""); + + if (fd >= 0) + close(fd); +} +#else /* FEATURE_CHECK_TAINTED_MODULE */ +#define check_tainted_module(x, y) do { } while (0); +#endif /* FEATURE_CHECK_TAINTED_MODULE */ + +#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS +/* add module source, timestamp, kernel version and a symbol for the + * start of some sections. this info is used by ksymoops to do better + * debugging. + */ +#if !ENABLE_FEATURE_INSMOD_VERSION_CHECKING +#define get_module_version(f, str) get_module_version(str) +#endif +static int +get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) +{ +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING + return new_get_module_version(f, str); +#else /* FEATURE_INSMOD_VERSION_CHECKING */ + strncpy(str, "???", sizeof(str)); + return -1; +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ +} + +/* add module source, timestamp, kernel version and a symbol for the + * start of some sections. this info is used by ksymoops to do better + * debugging. + */ +static void +add_ksymoops_symbols(struct obj_file *f, const char *filename, + const char *m_name) +{ + static const char symprefix[] ALIGN1 = "__insmod_"; + static const char section_names[][8] = { + ".text", + ".rodata", + ".data", + ".bss", + ".sbss" + }; + + struct obj_section *sec; + struct obj_symbol *sym; + char *name, *absolute_filename; + char str[STRVERSIONLEN]; + unsigned i; + int l, lm_name, lfilename, use_ksymtab, version; + struct stat statbuf; + + /* WARNING: was using realpath, but replaced by readlink to stop using + * lots of stack. But here it seems to be able to cause problems? */ + absolute_filename = xmalloc_readlink(filename); + if (!absolute_filename) + absolute_filename = xstrdup(filename); + + lm_name = strlen(m_name); + lfilename = strlen(absolute_filename); + + /* add to ksymtab if it already exists or there is no ksymtab and other symbols + * are not to be exported. otherwise leave ksymtab alone for now, the + * "export all symbols" compatibility code will export these symbols later. + */ + use_ksymtab = obj_find_section(f, "__ksymtab") || flag_noexport; + + sec = obj_find_section(f, ".this"); + if (sec) { + /* tag the module header with the object name, last modified + * timestamp and module version. worst case for module version + * is 0xffffff, decimal 16777215. putting all three fields in + * one symbol is less readable but saves kernel space. + */ + l = sizeof(symprefix) + /* "__insmod_" */ + lm_name + /* module name */ + 2 + /* "_O" */ + lfilename + /* object filename */ + 2 + /* "_M" */ + 2 * sizeof(statbuf.st_mtime) + /* mtime in hex */ + 2 + /* "_V" */ + 8 + /* version in dec */ + 1; /* nul */ + name = xmalloc(l); + if (stat(absolute_filename, &statbuf) != 0) + statbuf.st_mtime = 0; + version = get_module_version(f, str); /* -1 if not found */ + snprintf(name, l, "%s%s_O%s_M%0*lX_V%d", + symprefix, m_name, absolute_filename, + (int)(2 * sizeof(statbuf.st_mtime)), statbuf.st_mtime, + version); + sym = obj_add_symbol(f, name, -1, + ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), + sec->idx, sec->header.sh_addr, 0); + if (use_ksymtab) + new_add_ksymtab(f, sym); + } + free(absolute_filename); +#ifdef _NOT_SUPPORTED_ + /* record where the persistent data is going, same address as previous symbol */ + + if (f->persist) { + l = sizeof(symprefix) + /* "__insmod_" */ + lm_name + /* module name */ + 2 + /* "_P" */ + strlen(f->persist) + /* data store */ + 1; /* nul */ + name = xmalloc(l); + snprintf(name, l, "%s%s_P%s", + symprefix, m_name, f->persist); + sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), + sec->idx, sec->header.sh_addr, 0); + if (use_ksymtab) + new_add_ksymtab(f, sym); + } +#endif /* _NOT_SUPPORTED_ */ + /* tag the desired sections if size is non-zero */ + + for (i = 0; i < ARRAY_SIZE(section_names); ++i) { + sec = obj_find_section(f, section_names[i]); + if (sec && sec->header.sh_size) { + l = sizeof(symprefix) + /* "__insmod_" */ + lm_name + /* module name */ + 2 + /* "_S" */ + strlen(sec->name) + /* section name */ + 2 + /* "_L" */ + 8 + /* length in dec */ + 1; /* nul */ + name = xmalloc(l); + snprintf(name, l, "%s%s_S%s_L%ld", + symprefix, m_name, sec->name, + (long)sec->header.sh_size); + sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE), + sec->idx, sec->header.sh_addr, 0); + if (use_ksymtab) + new_add_ksymtab(f, sym); + } + } +} +#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ + +#if ENABLE_FEATURE_INSMOD_LOAD_MAP +static void print_load_map(struct obj_file *f) +{ + struct obj_section *sec; +#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL + struct obj_symbol **all, **p; + int i, nsyms, *loaded; + struct obj_symbol *sym; +#endif + /* Report on the section layout. */ + + printf("Sections: Size %-*s Align\n", + (int) (2 * sizeof(void *)), "Address"); + + for (sec = f->load_order; sec; sec = sec->load_next) { + int a; + unsigned long tmp; + + for (a = -1, tmp = sec->header.sh_addralign; tmp; ++a) + tmp >>= 1; + if (a == -1) + a = 0; + + printf("%-15s %08lx %0*lx 2**%d\n", + sec->name, + (long)sec->header.sh_size, + (int) (2 * sizeof(void *)), + (long)sec->header.sh_addr, + a); + } +#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL + /* Quick reference which section indices are loaded. */ + + i = f->header.e_shnum; + loaded = alloca(sizeof(int) * i); + while (--i >= 0) + loaded[i] = ((f->sections[i]->header.sh_flags & SHF_ALLOC) != 0); + + /* Collect the symbols we'll be listing. */ + + for (nsyms = i = 0; i < HASH_BUCKETS; ++i) + for (sym = f->symtab[i]; sym; sym = sym->next) + if (sym->secidx <= SHN_HIRESERVE + && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx])) + ++nsyms; + + all = alloca(nsyms * sizeof(struct obj_symbol *)); + + for (i = 0, p = all; i < HASH_BUCKETS; ++i) + for (sym = f->symtab[i]; sym; sym = sym->next) + if (sym->secidx <= SHN_HIRESERVE + && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx])) + *p++ = sym; + + /* And list them. */ + printf("\nSymbols:\n"); + for (p = all; p < all + nsyms; ++p) { + char type = '?'; + unsigned long value; + + sym = *p; + if (sym->secidx == SHN_ABS) { + type = 'A'; + value = sym->value; + } else if (sym->secidx == SHN_UNDEF) { + type = 'U'; + value = 0; + } else { + sec = f->sections[sym->secidx]; + + if (sec->header.sh_type == SHT_NOBITS) + type = 'B'; + else if (sec->header.sh_flags & SHF_ALLOC) { + if (sec->header.sh_flags & SHF_EXECINSTR) + type = 'T'; + else if (sec->header.sh_flags & SHF_WRITE) + type = 'D'; + else + type = 'R'; + } + value = sym->value + sec->header.sh_addr; + } + + if (ELF_ST_BIND(sym->info) == STB_LOCAL) + type = tolower(type); + + printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value, + type, sym->name); + } +#endif +} +#else /* !FEATURE_INSMOD_LOAD_MAP */ +static void print_load_map(struct obj_file *f UNUSED_PARAM) +{ +} +#endif + +int FAST_FUNC bb_init_module_24(const char *m_filename, const char *options UNUSED_PARAM) +{ + int k_crcs; + unsigned long m_size; + ElfW(Addr) m_addr; + struct obj_file *f; + struct utsname uts; + int exit_status = EXIT_FAILURE; + int m_has_modinfo; + char *m_name; +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING + char m_strversion[STRVERSIONLEN]; + int m_version, m_crcs; +#endif + FILE *fp; + + uname(&uts); + fp = fopen_for_read(m_filename); + if (fp == NULL) + return EXIT_FAILURE; + + m_name = xstrdup(bb_basename(m_filename)); + *strrchr(m_name, '.') = 0; + + f = obj_load(fp, LOADBITS); + + if (get_modinfo_value(f, "kernel_version") == NULL) + m_has_modinfo = 0; + else + m_has_modinfo = 1; + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING + /* Version correspondence? */ + if (!flag_quiet) { + if (m_has_modinfo) { + m_version = new_get_module_version(f, m_strversion); + if (m_version == -1) { + bb_error_msg_and_die("cannot find the kernel version the module was " + "compiled for"); + } + } + + if (strncmp(uts.release, m_strversion, STRVERSIONLEN) != 0) { + bb_error_msg("%skernel-module version mismatch\n" + "\t%s was compiled for kernel version %s\n" + "\twhile this kernel is version %s", + flag_force_load ? "warning: " : "", + m_name, m_strversion, uts.release); + if (!flag_force_load) + goto out; + } + } + k_crcs = 0; +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ + + if (query_module(NULL, 0, NULL, 0, NULL)) + bb_error_msg_and_die("not configured to support old kernels"); + new_get_kernel_symbols(); + k_crcs = new_is_kernel_checksummed(); + +#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING + m_crcs = 0; + if (m_has_modinfo) + m_crcs = new_is_module_checksummed(f); + + if (m_crcs != k_crcs) + obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash); +#endif /* FEATURE_INSMOD_VERSION_CHECKING */ + + /* Let the module know about the kernel symbols. */ + add_kernel_symbols(f); + + /* Allocate common symbols, symbol tables, and string tables. */ + + new_create_this_module(f, m_name); + obj_check_undefineds(f); + obj_allocate_commons(f); + check_tainted_module(f, m_name); + + /* done with the module name, on to the optional var=value arguments */ + new_process_module_arguments(f, options); + + arch_create_got(f); + hide_special_symbols(f); + +#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS + add_ksymoops_symbols(f, m_filename, m_name); +#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ + + new_create_module_ksymtab(f); + + /* Find current size of the module */ + m_size = obj_load_size(f); + + m_addr = create_module(m_name, m_size); + if (m_addr == (ElfW(Addr))(-1)) switch (errno) { + case EEXIST: + bb_error_msg_and_die("a module named %s already exists", m_name); + case ENOMEM: + bb_error_msg_and_die("can't allocate kernel memory for module; needed %lu bytes", + m_size); + default: + bb_perror_msg_and_die("create_module: %s", m_name); + } + +#if !LOADBITS + /* + * the PROGBITS section was not loaded by the obj_load + * now we can load them directly into the kernel memory + */ + if (!obj_load_progbits(fp, f, (char*)m_addr)) { + delete_module(m_name, 0); + goto out; + } +#endif + + if (!obj_relocate(f, m_addr)) { + delete_module(m_name, 0); + goto out; + } + + if (!new_init_module(m_name, f, m_size)) { + delete_module(m_name, 0); + goto out; + } + + if (flag_print_load_map) + print_load_map(f); + + exit_status = EXIT_SUCCESS; + + out: + if (fp) + fclose(fp); + free(m_name); + + return exit_status; +} diff --git a/modutils/modutils.c b/modutils/modutils.c new file mode 100644 index 000000000..18ea5374e --- /dev/null +++ b/modutils/modutils.c @@ -0,0 +1,141 @@ +/* + * Common modutils related functions for busybox + * + * Copyright (C) 2008 by Timo Teras <timo.teras@iki.fi> + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "modutils.h" + +#ifdef __UCLIBC__ +extern int init_module(void *module, unsigned long len, const char *options); +extern int delete_module(const char *module, unsigned int flags); +#else +# include <sys/syscall.h> +# define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts) +# define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags) +#endif + +USE_FEATURE_2_4_MODULES(char *insmod_outputname); + +/* + a libbb candidate from ice age! +*/ +llist_t FAST_FUNC *llist_find(llist_t *first, const char *str) +{ + while (first != NULL) { + if (strcmp(first->data, str) == 0) + return first; + first = first->link; + } + return NULL; +} + +void FAST_FUNC replace(char *s, char what, char with) +{ + while (*s) { + if (what == *s) + *s = with; + ++s; + } +} + +char * FAST_FUNC replace_underscores(char *s) +{ + replace(s, '-', '_'); + return s; +} + +int FAST_FUNC string_to_llist(char *string, llist_t **llist, const char *delim) +{ + char *tok; + int len = 0; + + while ((tok = strsep(&string, delim)) != NULL) { + if (tok[0] == '\0') + continue; + llist_add_to_end(llist, xstrdup(tok)); + len += strlen(tok); + } + return len; +} + +char * FAST_FUNC filename2modname(const char *filename, char *modname) +{ + int i; + char *from; + + if (filename == NULL) + return NULL; + if (modname == NULL) + modname = xmalloc(MODULE_NAME_LEN); + from = bb_get_last_path_component_nostrip(filename); + for (i = 0; i < MODULE_NAME_LEN && from[i] != '\0' && from[i] != '.'; i++) + modname[i] = (from[i] == '-') ? '_' : from[i]; + modname[i] = 0; + + return modname; +} + +const char * FAST_FUNC moderror(int err) +{ + switch (err) { + case -1: + return "no such module"; + case ENOEXEC: + return "invalid module format"; + case ENOENT: + return "unknown symbol in module, or unknown parameter"; + case ESRCH: + return "module has wrong symbol version"; + case ENOSYS: + return "kernel does not support requested operation"; + default: + return strerror(err); + } +} + +char * FAST_FUNC parse_cmdline_module_options(char **argv) +{ + char *options; + int optlen; + + options = xzalloc(1); + optlen = 0; + while (*++argv) { + options = xrealloc(options, optlen + 2 + strlen(*argv) + 2); + /* Spaces handled by "" pairs, but no way of escaping quotes */ + optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv); + } + return options; +} + +int FAST_FUNC bb_init_module(const char *filename, const char *options) +{ + size_t len = MAXINT(ssize_t); + char *image; + int rc = ENOENT; + +#if ENABLE_FEATURE_2_4_MODULES + if (get_linux_version_code() < KERNEL_VERSION(2,6,0)) + return bb_init_module_24(filename, options); +#endif + + /* Use the 2.6 way */ + image = (char *) xmalloc_open_zipped_read_close(filename, &len); + if (image) { + if (init_module(image, len, options) != 0) + rc = errno; + else + rc = 0; + free(image); + } + + return rc; +} + +int FAST_FUNC bb_delete_module(const char *module, unsigned int flags) +{ + return delete_module(module, flags); +} diff --git a/modutils/modutils.h b/modutils/modutils.h new file mode 100644 index 000000000..32ee18b06 --- /dev/null +++ b/modutils/modutils.h @@ -0,0 +1,68 @@ +/* + * Common modutils related functions for busybox + * + * Copyright (C) 2008 by Timo Teras <timo.teras@iki.fi> + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#ifndef __MODUTILS_H__ +#define __MODUTILS_H__ + +#include "libbb.h" +#include <stdio.h> + +#if __GNUC_PREREQ(4,1) +# pragma GCC visibility push(hidden) +#endif + +/* As defined in linux/include/linux/module.h */ +#define MODULE_NAME_LEN 64 + +const char *moderror(int err) FAST_FUNC; +llist_t *llist_find(llist_t *first, const char *str) FAST_FUNC; +void replace(char *s, char what, char with) FAST_FUNC; +char *replace_underscores(char *s) FAST_FUNC; +int string_to_llist(char *string, llist_t **llist, const char *delim) FAST_FUNC ; +char *filename2modname(const char *filename, char *modname) FAST_FUNC; +char *parse_cmdline_module_options(char **argv) FAST_FUNC; + +#define INSMOD_OPTS "vq" USE_FEATURE_2_4_MODULES("sLo:fkx") \ + USE_FEATURE_INSMOD_LOAD_MAP("m") +#define INSMOD_ARGS USE_FEATURE_2_4_MODULES(, &insmod_outputname) + +enum { + INSMOD_OPT_VERBOSE = 0x0001, + INSMOD_OPT_SILENT = 0x0002, + INSMOD_OPT_SYSLOG = 0x0004 * ENABLE_FEATURE_2_4_MODULES, + INSMOD_OPT_LOCK = 0x0008 * ENABLE_FEATURE_2_4_MODULES, + INSMOD_OPT_OUTPUTNAME = 0x0010 * ENABLE_FEATURE_2_4_MODULES, + INSMOD_OPT_FORCE = 0x0020 * ENABLE_FEATURE_2_4_MODULES, + INSMOD_OPT_KERNELD = 0x0040 * ENABLE_FEATURE_2_4_MODULES, + INSMOD_OPT_NO_EXPORT = 0x0080 * ENABLE_FEATURE_2_4_MODULES, + INSMOD_OPT_PRINT_MAP = 0x0100 * ENABLE_FEATURE_INSMOD_LOAD_MAP, +#if ENABLE_FEATURE_2_4_MODULES +#if ENABLE_FEATURE_INSMOD_LOAD_MAP + INSMOD_OPT_UNUSED = 0x0200, +#else /* ENABLE_FEATURE_INSMOD_LOAD_MAP */ + INSMOD_OPT_UNUSED = 0x0100 +#endif +#else /* ENABLE_FEATURE_2_4_MODULES */ + INSMOD_OPT_UNUSED = 0x0004 +#endif +}; + +int FAST_FUNC bb_init_module(const char *module, const char *options); +int FAST_FUNC bb_delete_module(const char *module, unsigned int flags); + +#if ENABLE_FEATURE_2_4_MODULES +extern char *insmod_outputname; + +int FAST_FUNC bb_init_module_24(const char *module, const char *options); +#endif + +#if __GNUC_PREREQ(4,1) +# pragma GCC visibility pop +#endif + +#endif diff --git a/modutils/rmmod.c b/modutils/rmmod.c index 5129b3495..cdc690a69 100644 --- a/modutils/rmmod.c +++ b/modutils/rmmod.c @@ -3,98 +3,45 @@ * Mini rmmod implementation for busybox * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ #include "libbb.h" - -#ifdef __UCLIBC__ -extern int delete_module(const char *module, unsigned int flags); -#else -# include <sys/syscall.h> -# define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags) -#endif - -#if ENABLE_FEATURE_2_6_MODULES -static void filename2modname(char *modname, const char *afterslash) -{ - unsigned int i; - int kr_chk = 1; - - if (ENABLE_FEATURE_2_4_MODULES - && get_linux_version_code() <= KERNEL_VERSION(2,6,0)) - kr_chk = 0; - - /* Convert to underscores, stop at first . */ - for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) { - if (kr_chk && (afterslash[i] == '-')) - modname[i] = '_'; - else - modname[i] = afterslash[i]; - } - modname[i] = '\0'; -} -#else -void filename2modname(char *modname, const char *afterslash); -#endif - -// There really should be a header file for this... - -int query_module(const char *name, int which, void *buf, - size_t bufsize, size_t *ret); +#include "modutils.h" int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int rmmod_main(int argc, char **argv) +int rmmod_main(int argc UNUSED_PARAM, char **argv) { - int n, ret = EXIT_SUCCESS; + int n; unsigned int flags = O_NONBLOCK|O_EXCL; -#define misc_buf bb_common_bufsiz1 - /* Parse command line. */ - n = getopt32(argv, "wfa"); + n = getopt32(argv, "wfas"); // -s ignored + argv += optind; + if (n & 1) // --wait flags &= ~O_NONBLOCK; if (n & 2) // --force flags |= O_TRUNC; if (n & 4) { /* Unload _all_ unused modules via NULL delete_module() call */ - /* until the number of modules does not change */ - size_t nmod = 0; /* number of modules */ - size_t pnmod = -1; /* previous number of modules */ - - while (nmod != pnmod) { - if (delete_module(NULL, flags) != 0) { - if (errno == EFAULT) - return ret; - bb_perror_msg_and_die("rmmod"); - } - pnmod = nmod; - // the 1 here is QM_MODULES. - if (ENABLE_FEATURE_QUERY_MODULE_INTERFACE && query_module(NULL, - 1, misc_buf, sizeof(misc_buf), - &nmod)) - { - bb_perror_msg_and_die("QM_MODULES"); - } - } + if (bb_delete_module(NULL, flags) != 0 && errno != EFAULT) + bb_perror_msg_and_die("rmmod"); return EXIT_SUCCESS; } - if (optind == argc) + if (!*argv) bb_show_usage(); - for (n = optind; n < argc; n++) { - if (ENABLE_FEATURE_2_6_MODULES) { - filename2modname(misc_buf, bb_basename(argv[n])); - } - - if (delete_module(ENABLE_FEATURE_2_6_MODULES ? misc_buf : argv[n], flags)) { - bb_simple_perror_msg(argv[n]); - ret = EXIT_FAILURE; - } + while (*argv) { + char modname[MODULE_NAME_LEN]; + filename2modname(bb_basename(*argv++), modname); + if (bb_delete_module(modname, flags)) + bb_error_msg_and_die("cannot unload '%s': %s", + modname, moderror(errno)); } - return ret; + return EXIT_SUCCESS; } |