diff options
Diffstat (limited to 'modutils/modutils.c')
| -rw-r--r-- | modutils/modutils.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/modutils/modutils.c b/modutils/modutils.c index 0a056731d..d36caaf68 100644 --- a/modutils/modutils.c +++ b/modutils/modutils.c @@ -13,6 +13,9 @@ 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) +# if defined(__NR_finit_module) +# define finit_module(fd, uargs, flags) syscall(__NR_finit_module, fd, uargs, flags) +# endif # define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags) #endif @@ -212,6 +215,24 @@ int FAST_FUNC bb_init_module(const char *filename, const char *options) return bb_init_module_24(filename, options); #endif + /* + * First we try finit_module if available. Some kernels are configured + * to only allow loading of modules off of secure storage (like a read- + * only rootfs) which needs the finit_module call. If it fails, we fall + * back to normal module loading to support compressed modules. + */ +# ifdef __NR_finit_module + { + int fd = open(filename, O_RDONLY | O_CLOEXEC); + if (fd >= 0) { + rc = finit_module(fd, options, 0) != 0; + close(fd); + if (rc == 0) + return rc; + } + } +# endif + image_size = INT_MAX - 4095; mmaped = 0; image = try_to_mmap_module(filename, &image_size); |