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| author | Roland McGrath <roland@gnu.org> | 1996-01-06 21:39:03 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1996-01-06 21:39:03 +0000 |
| commit | c4b7291877252d1a0b2e2afbc90bab7fe6965a38 (patch) | |
| tree | 6371ecfa73340c73a396d2a5d09f2bb3c9b0ad4f /elf | |
| parent | 85f40840015f648c8fdb6dfe7ea462be3884e10c (diff) | |
| download | glibc-c4b7291877252d1a0b2e2afbc90bab7fe6965a38.zip glibc-c4b7291877252d1a0b2e2afbc90bab7fe6965a38.tar.gz glibc-c4b7291877252d1a0b2e2afbc90bab7fe6965a38.tar.bz2 | |
Fixed ELFMAG check to work for either byte order. Align end of load segment only to page size, not to segment alignment.
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-load.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index 5f57916..416f9ac 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -1,5 +1,5 @@ /* _dl_map_object -- Map in a shared object's segments from the file. -Copyright (C) 1995 Free Software Foundation, Inc. +Copyright (C) 1995, 1996 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -246,10 +246,19 @@ _dl_map_object_from_fd (const char *name, int fd, char *realname) header = map (0, sizeof *header); /* Check the header for basic validity. */ - if (*(Elf32_Word *) &header->e_ident != ((ELFMAG0 << (EI_MAG0 * 8)) | - (ELFMAG1 << (EI_MAG1 * 8)) | - (ELFMAG2 << (EI_MAG2 * 8)) | - (ELFMAG3 << (EI_MAG3 * 8)))) + if (*(Elf32_Word *) &header->e_ident != +#if BYTE_ORDER == LITTLE_ENDIAN + ((ELFMAG0 << (EI_MAG0 * 8)) | + (ELFMAG1 << (EI_MAG1 * 8)) | + (ELFMAG2 << (EI_MAG2 * 8)) | + (ELFMAG3 << (EI_MAG3 * 8))) +#else + ((ELFMAG0 << (EI_MAG3 * 8)) | + (ELFMAG1 << (EI_MAG2 * 8)) | + (ELFMAG2 << (EI_MAG1 * 8)) | + (ELFMAG3 << (EI_MAG0 * 8))) +#endif + ) LOSE ("invalid ELF header"); if (header->e_ident[EI_CLASS] != ELFCLASS32) LOSE ("ELF file class not 32-bit"); @@ -318,8 +327,8 @@ _dl_map_object_from_fd (const char *name, int fd, char *realname) { struct loadcmd *c = &loadcmds[nloadcmds++]; c->mapstart = ph->p_vaddr & ~(ph->p_align - 1); - c->mapend = ((ph->p_vaddr + ph->p_filesz + ph->p_align - 1) - & ~(ph->p_align - 1)); + c->mapend = ((ph->p_vaddr + ph->p_filesz + pagesize - 1) + & ~(pagesize - 1)); c->dataend = ph->p_vaddr + ph->p_filesz; c->allocend = ph->p_vaddr + ph->p_memsz; c->mapoff = ph->p_offset & ~(ph->p_align - 1); |