From efa5bf1dd2cf3cdee0bfe97cfd76ff2296179ae4 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 21 May 2007 18:41:17 -0700 Subject: [PATCH] Revert "kbuild: make better section mismatch reports on i386, arm and mips" This reverts commit f892b7d480eec809a5dfbd6e65742b3f3155e50e, which totally broke the build on x86 with CONFIG_RELOCATABLE (which, as far as I can tell, is the only case where it should even matter!) due to a SIGSEGV in modpost. Cc: Sam Ravnborg Cc: Atsushi Nemoto Signed-off-by: Linus Torvalds --- scripts/mod/modpost.c | 79 ------------------------------------------- scripts/mod/modpost.h | 3 -- 2 files changed, 82 deletions(-) diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 8424d1f53b..8e5610d428 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -384,7 +384,6 @@ static int parse_elf(struct elf_info *info, const char *filename) sechdrs[i].sh_size = TO_NATIVE(sechdrs[i].sh_size); sechdrs[i].sh_link = TO_NATIVE(sechdrs[i].sh_link); sechdrs[i].sh_name = TO_NATIVE(sechdrs[i].sh_name); - sechdrs[i].sh_info = TO_NATIVE(sechdrs[i].sh_info); } /* Find symbol table. */ for (i = 1; i < hdr->e_shnum; i++) { @@ -754,8 +753,6 @@ static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf_Addr addr, for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { if (sym->st_shndx != relsym->st_shndx) continue; - if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) - continue; if (sym->st_value == addr) return sym; } @@ -898,68 +895,6 @@ static void warn_sec_mismatch(const char *modname, const char *fromsec, } } -static void addend_386_rel(struct elf_info *elf, int section, Elf_Rela *r) -{ - Elf_Shdr *sechdrs = elf->sechdrs; - unsigned int r_typ; - unsigned int *location; - - r_typ = ELF_R_TYPE(r->r_info); - location = (void *)elf->hdr + - sechdrs[sechdrs[section].sh_info].sh_offset + r->r_offset; - switch (r_typ) { - case R_386_32: - r->r_addend = TO_NATIVE(*location); - break; - case R_386_PC32: - r->r_addend = TO_NATIVE(*location) + 4; - break; - } -} - -static void addend_arm_rel(struct elf_info *elf, int section, Elf_Rela *r) -{ - Elf_Shdr *sechdrs = elf->sechdrs; - unsigned int r_typ; - unsigned int *location; - - r_typ = ELF_R_TYPE(r->r_info); - location = (void *)elf->hdr + - sechdrs[sechdrs[section].sh_info].sh_offset + r->r_offset; - switch (r_typ) { - case R_ARM_ABS32: - r->r_addend = TO_NATIVE(*location); - break; - case R_ARM_PC24: - r->r_addend = ((TO_NATIVE(*location) & 0x00ffffff) << 2) + 8; - break; - } -} - -static int addend_mips_rel(struct elf_info *elf, int section, Elf_Rela *r) -{ - Elf_Shdr *sechdrs = elf->sechdrs; - unsigned int r_typ; - unsigned int *location; - unsigned int inst; - - r_typ = ELF_R_TYPE(r->r_info); - if (r_typ == R_MIPS_HI16) - return 1; /* skip this */ - location = (void *)elf->hdr + - sechdrs[sechdrs[section].sh_info].sh_offset + r->r_offset; - inst = TO_NATIVE(*location); - switch (r_typ) { - case R_MIPS_LO16: - r->r_addend = ((inst & 0xffff) ^ 0x8000) - 0x8000; - break; - case R_MIPS_26: - r->r_addend = (inst & 0x03ffffff) << 2; - break; - } - return 0; -} - /** * A module includes a number of sections that are discarded * either when loaded or when used as built-in. @@ -1003,11 +938,8 @@ static void check_sec_ref(struct module *mod, const char *modname, r.r_offset = TO_NATIVE(rela->r_offset); #if KERNEL_ELFCLASS == ELFCLASS64 if (hdr->e_machine == EM_MIPS) { - unsigned int r_typ; r_sym = ELF64_MIPS_R_SYM(rela->r_info); r_sym = TO_NATIVE(r_sym); - r_typ = ELF64_MIPS_R_TYPE(rela->r_info); - r.r_info = ELF64_R_INFO(r_sym, r_typ); } else { r.r_info = TO_NATIVE(rela->r_info); r_sym = ELF_R_SYM(r.r_info); @@ -1040,11 +972,8 @@ static void check_sec_ref(struct module *mod, const char *modname, r.r_offset = TO_NATIVE(rel->r_offset); #if KERNEL_ELFCLASS == ELFCLASS64 if (hdr->e_machine == EM_MIPS) { - unsigned int r_typ; r_sym = ELF64_MIPS_R_SYM(rel->r_info); r_sym = TO_NATIVE(r_sym); - r_typ = ELF64_MIPS_R_TYPE(rel->r_info); - r.r_info = ELF64_R_INFO(r_sym, r_typ); } else { r.r_info = TO_NATIVE(rel->r_info); r_sym = ELF_R_SYM(r.r_info); @@ -1054,14 +983,6 @@ static void check_sec_ref(struct module *mod, const char *modname, r_sym = ELF_R_SYM(r.r_info); #endif r.r_addend = 0; - if (hdr->e_machine == EM_386) - addend_386_rel(elf, i, &r); - else if (hdr->e_machine == EM_ARM) - addend_arm_rel(elf, i, &r); - else if (hdr->e_machine == EM_MIPS) { - if (addend_mips_rel(elf, i, &r)) - continue; - } sym = elf->symtab_start + r_sym; /* Skip special sections */ if (sym->st_shndx >= SHN_LORESERVE) diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h index 4156dd34c5..0858caa9c0 100644 --- a/scripts/mod/modpost.h +++ b/scripts/mod/modpost.h @@ -60,9 +60,6 @@ typedef union #define ELF64_MIPS_R_SYM(i) \ ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym) -#define ELF64_MIPS_R_TYPE(i) \ - ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1) - #if KERNEL_ELFDATA != HOST_ELFDATA static inline void __endian(const void *src, void *dest, unsigned int size) -- 2.39.5