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https://github.com/edk2-porting/linux-next.git
synced 2024-11-20 16:46:23 +08:00
kbuild: code refactoring in modpost
Split a too long function up in smaller bits to make prgram logic easier to follow. A few related changes done due to parameter changes. No functional changes. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg
parent
9ad21c3f3e
commit
5b24c0715f
@ -937,19 +937,19 @@ static void warn_sec_mismatch(const char *modname, const char *fromsec,
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}
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static unsigned int *reloc_location(struct elf_info *elf,
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int rsection, Elf_Rela *r)
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Elf_Shdr *sechdr, Elf_Rela *r)
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{
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Elf_Shdr *sechdrs = elf->sechdrs;
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int section = sechdrs[rsection].sh_info;
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int section = sechdr->sh_info;
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return (void *)elf->hdr + sechdrs[section].sh_offset +
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(r->r_offset - sechdrs[section].sh_addr);
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}
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static int addend_386_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
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static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
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{
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unsigned int r_typ = ELF_R_TYPE(r->r_info);
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unsigned int *location = reloc_location(elf, rsection, r);
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unsigned int *location = reloc_location(elf, sechdr, r);
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switch (r_typ) {
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case R_386_32:
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@ -965,7 +965,7 @@ static int addend_386_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
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return 0;
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}
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static int addend_arm_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
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static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
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{
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unsigned int r_typ = ELF_R_TYPE(r->r_info);
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@ -978,8 +978,8 @@ static int addend_arm_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
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case R_ARM_PC24:
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/* From ARM ABI: ((S + A) | T) - P */
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r->r_addend = (int)(long)(elf->hdr +
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elf->sechdrs[rsection].sh_offset +
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(r->r_offset - elf->sechdrs[rsection].sh_addr));
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sechdr->sh_offset +
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(r->r_offset - sechdr->sh_addr));
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break;
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default:
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return 1;
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@ -987,10 +987,10 @@ static int addend_arm_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
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return 0;
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}
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static int addend_mips_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
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static int addend_mips_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
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{
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unsigned int r_typ = ELF_R_TYPE(r->r_info);
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unsigned int *location = reloc_location(elf, rsection, r);
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unsigned int *location = reloc_location(elf, sechdr, r);
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unsigned int inst;
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if (r_typ == R_MIPS_HI16)
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@ -1010,6 +1010,128 @@ static int addend_mips_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
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return 0;
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}
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static void section_rela(const char *modname, struct elf_info *elf,
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Elf_Shdr *sechdr, int section(const char *),
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int section_ref_ok(const char *))
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{
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Elf_Sym *sym;
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Elf_Rela *rela;
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Elf_Rela r;
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unsigned int r_sym;
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const char *fromsec;
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const char * tosec;
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Elf_Ehdr *hdr = elf->hdr;
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Elf_Rela *start = (void *)hdr + sechdr->sh_offset;
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Elf_Rela *stop = (void *)start + sechdr->sh_size;
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const char *secstrings = (void *)hdr +
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elf->sechdrs[hdr->e_shstrndx].sh_offset;
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fromsec = secstrings + sechdr->sh_name;
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fromsec += strlen(".rela");
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/* if from section (name) is know good then skip it */
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if (section_ref_ok(fromsec))
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return;
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for (rela = start; rela < stop; rela++) {
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r.r_offset = TO_NATIVE(rela->r_offset);
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#if KERNEL_ELFCLASS == ELFCLASS64
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if (hdr->e_machine == EM_MIPS) {
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unsigned int r_typ;
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r_sym = ELF64_MIPS_R_SYM(rela->r_info);
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r_sym = TO_NATIVE(r_sym);
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r_typ = ELF64_MIPS_R_TYPE(rela->r_info);
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r.r_info = ELF64_R_INFO(r_sym, r_typ);
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} else {
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r.r_info = TO_NATIVE(rela->r_info);
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r_sym = ELF_R_SYM(r.r_info);
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}
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#else
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r.r_info = TO_NATIVE(rela->r_info);
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r_sym = ELF_R_SYM(r.r_info);
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#endif
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r.r_addend = TO_NATIVE(rela->r_addend);
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sym = elf->symtab_start + r_sym;
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/* Skip special sections */
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if (sym->st_shndx >= SHN_LORESERVE)
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continue;
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tosec = secstrings +
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elf->sechdrs[sym->st_shndx].sh_name;
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if (section(tosec))
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warn_sec_mismatch(modname, fromsec, elf, sym, r);
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}
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}
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static void section_rel(const char *modname, struct elf_info *elf,
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Elf_Shdr *sechdr, int section(const char *),
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int section_ref_ok(const char *))
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{
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Elf_Sym *sym;
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Elf_Rel *rel;
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Elf_Rela r;
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unsigned int r_sym;
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const char *fromsec;
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const char * tosec;
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Elf_Ehdr *hdr = elf->hdr;
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Elf_Rel *start = (void *)hdr + sechdr->sh_offset;
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Elf_Rel *stop = (void *)start + sechdr->sh_size;
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const char *secstrings = (void *)hdr +
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elf->sechdrs[hdr->e_shstrndx].sh_offset;
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fromsec = secstrings + sechdr->sh_name;
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fromsec += strlen(".rel");
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/* if from section (name) is know good then skip it */
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if (section_ref_ok(fromsec))
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return;
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for (rel = start; rel < stop; rel++) {
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r.r_offset = TO_NATIVE(rel->r_offset);
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#if KERNEL_ELFCLASS == ELFCLASS64
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if (hdr->e_machine == EM_MIPS) {
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unsigned int r_typ;
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r_sym = ELF64_MIPS_R_SYM(rel->r_info);
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r_sym = TO_NATIVE(r_sym);
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r_typ = ELF64_MIPS_R_TYPE(rel->r_info);
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r.r_info = ELF64_R_INFO(r_sym, r_typ);
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} else {
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r.r_info = TO_NATIVE(rel->r_info);
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r_sym = ELF_R_SYM(r.r_info);
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}
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#else
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r.r_info = TO_NATIVE(rel->r_info);
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r_sym = ELF_R_SYM(r.r_info);
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#endif
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r.r_addend = 0;
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switch (hdr->e_machine) {
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case EM_386:
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if (addend_386_rel(elf, sechdr, &r))
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continue;
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break;
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case EM_ARM:
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if (addend_arm_rel(elf, sechdr, &r))
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continue;
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break;
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case EM_MIPS:
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if (addend_mips_rel(elf, sechdr, &r))
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continue;
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break;
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}
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sym = elf->symtab_start + r_sym;
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/* Skip special sections */
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if (sym->st_shndx >= SHN_LORESERVE)
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continue;
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tosec = secstrings +
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elf->sechdrs[sym->st_shndx].sh_name;
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if (section(tosec))
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warn_sec_mismatch(modname, fromsec, elf, sym, r);
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}
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}
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/**
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* A module includes a number of sections that are discarded
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* either when loaded or when used as built-in.
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@ -1028,108 +1150,18 @@ static void check_sec_ref(struct module *mod, const char *modname,
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int section_ref_ok(const char *))
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{
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int i;
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Elf_Sym *sym;
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Elf_Ehdr *hdr = elf->hdr;
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Elf_Shdr *sechdrs = elf->sechdrs;
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const char *secstrings = (void *)hdr +
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sechdrs[hdr->e_shstrndx].sh_offset;
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/* Walk through all sections */
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for (i = 0; i < hdr->e_shnum; i++) {
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const char *name = secstrings + sechdrs[i].sh_name;
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const char *secname;
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Elf_Rela r;
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unsigned int r_sym;
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/* We want to process only relocation sections and not .init */
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if (sechdrs[i].sh_type == SHT_RELA) {
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Elf_Rela *rela;
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Elf_Rela *start = (void *)hdr + sechdrs[i].sh_offset;
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Elf_Rela *stop = (void *)start + sechdrs[i].sh_size;
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name += strlen(".rela");
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if (section_ref_ok(name))
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continue;
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for (rela = start; rela < stop; rela++) {
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r.r_offset = TO_NATIVE(rela->r_offset);
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#if KERNEL_ELFCLASS == ELFCLASS64
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if (hdr->e_machine == EM_MIPS) {
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unsigned int r_typ;
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r_sym = ELF64_MIPS_R_SYM(rela->r_info);
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r_sym = TO_NATIVE(r_sym);
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r_typ = ELF64_MIPS_R_TYPE(rela->r_info);
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r.r_info = ELF64_R_INFO(r_sym, r_typ);
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} else {
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r.r_info = TO_NATIVE(rela->r_info);
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r_sym = ELF_R_SYM(r.r_info);
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}
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#else
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r.r_info = TO_NATIVE(rela->r_info);
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r_sym = ELF_R_SYM(r.r_info);
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#endif
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r.r_addend = TO_NATIVE(rela->r_addend);
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sym = elf->symtab_start + r_sym;
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/* Skip special sections */
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if (sym->st_shndx >= SHN_LORESERVE)
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continue;
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secname = secstrings +
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sechdrs[sym->st_shndx].sh_name;
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if (section(secname))
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warn_sec_mismatch(modname, name,
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elf, sym, r);
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}
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} else if (sechdrs[i].sh_type == SHT_REL) {
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Elf_Rel *rel;
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Elf_Rel *start = (void *)hdr + sechdrs[i].sh_offset;
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Elf_Rel *stop = (void *)start + sechdrs[i].sh_size;
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name += strlen(".rel");
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if (section_ref_ok(name))
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continue;
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for (rel = start; rel < stop; rel++) {
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r.r_offset = TO_NATIVE(rel->r_offset);
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#if KERNEL_ELFCLASS == ELFCLASS64
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if (hdr->e_machine == EM_MIPS) {
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unsigned int r_typ;
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r_sym = ELF64_MIPS_R_SYM(rel->r_info);
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r_sym = TO_NATIVE(r_sym);
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r_typ = ELF64_MIPS_R_TYPE(rel->r_info);
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r.r_info = ELF64_R_INFO(r_sym, r_typ);
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} else {
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r.r_info = TO_NATIVE(rel->r_info);
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r_sym = ELF_R_SYM(r.r_info);
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}
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#else
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r.r_info = TO_NATIVE(rel->r_info);
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r_sym = ELF_R_SYM(r.r_info);
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#endif
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r.r_addend = 0;
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switch (hdr->e_machine) {
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case EM_386:
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if (addend_386_rel(elf, i, &r))
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continue;
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break;
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case EM_ARM:
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if (addend_arm_rel(elf, i, &r))
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continue;
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break;
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case EM_MIPS:
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if (addend_mips_rel(elf, i, &r))
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continue;
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break;
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}
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sym = elf->symtab_start + r_sym;
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/* Skip special sections */
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if (sym->st_shndx >= SHN_LORESERVE)
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continue;
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secname = secstrings +
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sechdrs[sym->st_shndx].sh_name;
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if (section(secname))
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warn_sec_mismatch(modname, name,
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elf, sym, r);
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}
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}
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if (sechdrs[i].sh_type == SHT_RELA)
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section_rela(modname, elf, &elf->sechdrs[i],
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section, section_ref_ok);
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else if (sechdrs[i].sh_type == SHT_REL)
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section_rel(modname, elf, &elf->sechdrs[i],
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section, section_ref_ok);
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}
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}
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