From a9111bd499622577c3acd6565f02d6efdd16b44c Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Sun, 26 Nov 2017 05:33:35 -0600 Subject: Use endianness info to read executable type. --- toys/posix/file.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) (limited to 'toys/posix') diff --git a/toys/posix/file.c b/toys/posix/file.c index 5e5c15bc..b84eece6 100644 --- a/toys/posix/file.c +++ b/toys/posix/file.c @@ -30,7 +30,7 @@ GLOBALS( static void do_elf_file(int fd, struct stat *sb) { int endian = toybuf[5], bits = toybuf[4], i, j; - int64_t (*elf_int)(void *ptr, unsigned size) = peek_le; + int64_t (*elf_int)(void *ptr, unsigned size); // Values from include/linux/elf-em.h (plus arch/*/include/asm/elf.h) // Names are linux/arch/ directory (sometimes before 32/64 bit merges) struct {int val; char *name;} type[] = {{0x9026, "alpha"}, {93, "arc"}, @@ -53,9 +53,10 @@ static void do_elf_file(int fd, struct stat *sb) int phentsize, phnum, shsize, shnum; printf("ELF "); + elf_int = (endian==2) ? peek_be : peek_le; - // executable (ELF says this is short but reality says byte, not MSB swapped) - i = toybuf[16]; + // executable type + i = elf_int(toybuf+16, 2); if (i == 1) printf("relocatable"); else if (i == 2) printf("executable"); else if (i == 3) printf("shared object"); @@ -73,10 +74,8 @@ static void do_elf_file(int fd, struct stat *sb) // "LSB" if (endian == 1) printf("LSB "); - else if (endian == 2) { - printf("MSB "); - elf_int = peek_be; - } else { + else if (endian == 2) printf("MSB "); + else { printf("(bad endian %d) \n", endian); endian = 0; } -- cgit v1.2.3