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[PATCH] kbuild: fix modpost segfault for 64bit mipsel kernel

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Here is an updated r_info layout fix.  Please apply "check SHT_REL
sections" patch before this.

64bit mips has different r_info layout.  This patch fixes modpost
segfault for 64bit little endian mips kernel.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Atsushi Nemoto 2006-05-20 15:00:28 -07:00 • committed by Linus Torvalds
parent 2c1a51f39d
commit eae07ac607
2 changed files with 46 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

31
scripts/mod/modpost.c
View file

@ -700,6 +700,7 @@ static void check_sec_ref(struct module *mod, const char *modname,
const char *name = secstrings + sechdrs[i].sh_name;
const char *secname;
Elf_Rela r;
unsigned int r_sym;
/* We want to process only relocation sections and not .init */
if (sechdrs[i].sh_type == SHT_RELA) {
Elf_Rela *rela;
@ -711,9 +712,20 @@ static void check_sec_ref(struct module *mod, const char *modname,
for (rela = start; rela < stop; rela++) {
r.r_offset = TO_NATIVE(rela->r_offset);
r.r_info = TO_NATIVE(rela->r_info);
#if KERNEL_ELFCLASS == ELFCLASS64
if (hdr->e_machine == EM_MIPS) {
r_sym = ELF64_MIPS_R_SYM(rela->r_info);
r_sym = TO_NATIVE(r_sym);
} else {
r.r_info = TO_NATIVE(rela->r_info);
r_sym = ELF_R_SYM(r.r_info);
}
#else
r.r_info = TO_NATIVE(rela->r_info);
r_sym = ELF_R_SYM(r.r_info);
#endif
r.r_addend = TO_NATIVE(rela->r_addend);
sym = elf->symtab_start + ELF_R_SYM(r.r_info);
sym = elf->symtab_start + r_sym;
/* Skip special sections */
if (sym->st_shndx >= SHN_LORESERVE)
continue;
@ -734,9 +746,20 @@ static void check_sec_ref(struct module *mod, const char *modname,
for (rel = start; rel < stop; rel++) {
r.r_offset = TO_NATIVE(rel->r_offset);
r.r_info = TO_NATIVE(rel->r_info);
#if KERNEL_ELFCLASS == ELFCLASS64
if (hdr->e_machine == EM_MIPS) {
r_sym = ELF64_MIPS_R_SYM(rel->r_info);
r_sym = TO_NATIVE(r_sym);
} else {
r.r_info = TO_NATIVE(rel->r_info);
r_sym = ELF_R_SYM(r.r_info);
}
#else
r.r_info = TO_NATIVE(rel->r_info);
r_sym = ELF_R_SYM(r.r_info);
#endif
r.r_addend = 0;
sym = elf->symtab_start + ELF_R_SYM(r.r_info);
sym = elf->symtab_start + r_sym;
/* Skip special sections */
if (sym->st_shndx >= SHN_LORESERVE)
continue;