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kbuild: fix modpost segfault for 64bit mipsel kernel 

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>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Atsushi Nemoto 2006-04-25 01:53:43 +09:00 committed by Sam Ravnborg
parent 543f2a3382
commit c8d8b837eb
2 changed files with 28 additions and 2 deletions
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11
scripts/mod/modpost.c
View File

@ -709,10 +709,17 @@ static void check_sec_ref(struct module *mod, const char *modname,
for (rela = start; rela < stop; rela++) {
Elf_Rela r;
const char *secname;
unsigned int r_sym;
r.r_offset = TO_NATIVE(rela->r_offset);
r.r_info = TO_NATIVE(rela->r_info);
if (hdr->e_ident[EI_CLASS] == ELFCLASS64 &&
hdr->e_machine == EM_MIPS) {
r_sym = ELF64_MIPS_R_SYM(rela->r_info);
r_sym = TO_NATIVE(r_sym);
} else {
r_sym = ELF_R_SYM(TO_NATIVE(rela->r_info));
}
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;

19
scripts/mod/modpost.h
View File

@ -39,6 +39,25 @@
#define ELF_R_TYPE ELF64_R_TYPE
#endif
/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
typedef struct
{
Elf32_Word r_sym; /* Symbol index */
unsigned char r_ssym; /* Special symbol for 2nd relocation */
unsigned char r_type3; /* 3rd relocation type */
unsigned char r_type2; /* 2nd relocation type */
unsigned char r_type1; /* 1st relocation type */
} _Elf64_Mips_R_Info;
typedef union
{
Elf64_Xword r_info_number;
_Elf64_Mips_R_Info r_info_fields;
} _Elf64_Mips_R_Info_union;
#define ELF64_MIPS_R_SYM(i) \
((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
#if KERNEL_ELFDATA != HOST_ELFDATA
static inline void __endian(const void *src, void *dest, unsigned int size)