diff options
Diffstat (limited to 'bfd/elf.c')
| -rw-r--r-- | bfd/elf.c | 56 |
1 files changed, 56 insertions, 0 deletions
@@ -1747,6 +1747,62 @@ bfd_section_from_shdr (abfd, shindex) return true; } +/* Return the section for the local symbol specified by ABFD, R_SYMNDX. + Return SEC for sections that have no elf section, and NULL on error. */ + +asection * +bfd_section_from_r_symndx (abfd, cache, sec, r_symndx) + bfd *abfd; + struct sym_sec_cache *cache; + asection *sec; + unsigned long r_symndx; +{ + unsigned char esym_shndx[2]; + unsigned int isym_shndx; + Elf_Internal_Shdr *symtab_hdr; + file_ptr pos; + bfd_size_type amt; + unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE; + + if (cache->abfd == abfd && cache->indx[ent] == r_symndx) + return cache->sec[ent]; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + pos = symtab_hdr->sh_offset; + if (get_elf_backend_data (abfd)->s->sizeof_sym + == sizeof (Elf64_External_Sym)) + { + pos += r_symndx * sizeof (Elf64_External_Sym); + pos += offsetof (Elf64_External_Sym, st_shndx); + } + else + { + pos += r_symndx * sizeof (Elf32_External_Sym); + pos += offsetof (Elf32_External_Sym, st_shndx); + } + amt = sizeof (esym_shndx); + if (bfd_seek (abfd, pos, SEEK_SET) != 0 + || bfd_bread ((PTR) esym_shndx, amt, abfd) != amt) + return NULL; + isym_shndx = H_GET_16 (abfd, esym_shndx); + + if (cache->abfd != abfd) + { + memset (cache->indx, -1, sizeof (cache->indx)); + cache->abfd = abfd; + } + cache->indx[ent] = r_symndx; + cache->sec[ent] = sec; + if (isym_shndx > 0 && isym_shndx < SHN_LORESERVE) + { + asection *s; + s = bfd_section_from_elf_index (abfd, isym_shndx); + if (s != NULL) + cache->sec[ent] = s; + } + return cache->sec[ent]; +} + /* Given an ELF section number, retrieve the corresponding BFD section. */ |