diff options
Diffstat (limited to 'binutils/readelf.c')
| -rw-r--r-- | binutils/readelf.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/binutils/readelf.c b/binutils/readelf.c index 17c27ce..4326cd0 100644 --- a/binutils/readelf.c +++ b/binutils/readelf.c @@ -14194,6 +14194,138 @@ load_specific_debug_section (enum dwarf_section_display_enum debug, return TRUE; } +#if HAVE_LIBDEBUGINFOD +/* Return a hex string representation of the build-id. */ +unsigned char * +get_build_id (void * data) +{ + Filedata * filedata = (Filedata *)data; + Elf_Internal_Shdr * shdr; + unsigned long i; + + /* Iterate through notes to find note.gnu.build-id. */ + for (i = 0, shdr = filedata->section_headers; + i < filedata->file_header.e_shnum && shdr != NULL; + i++, shdr++) + { + if (shdr->sh_type != SHT_NOTE) + continue; + + char * next; + char * end; + size_t data_remaining; + size_t min_notesz; + Elf_External_Note * enote; + Elf_Internal_Note inote; + + bfd_vma offset = shdr->sh_offset; + bfd_vma align = shdr->sh_addralign; + bfd_vma length = shdr->sh_size; + + enote = (Elf_External_Note *) get_section_contents (shdr, filedata); + if (enote == NULL) + continue; + + if (align < 4) + align = 4; + else if (align != 4 && align != 8) + continue; + + end = (char *) enote + length; + data_remaining = end - (char *) enote; + + if (!is_ia64_vms (filedata)) + { + min_notesz = offsetof (Elf_External_Note, name); + if (data_remaining < min_notesz) + { + warn (ngettext ("debuginfod: Corrupt note: only %ld byte remains, " + "not enough for a full note\n", + "Corrupt note: only %ld bytes remain, " + "not enough for a full note\n", + data_remaining), + (long) data_remaining); + break; + } + data_remaining -= min_notesz; + + inote.type = BYTE_GET (enote->type); + inote.namesz = BYTE_GET (enote->namesz); + inote.namedata = enote->name; + inote.descsz = BYTE_GET (enote->descsz); + inote.descdata = ((char *) enote + + ELF_NOTE_DESC_OFFSET (inote.namesz, align)); + inote.descpos = offset + (inote.descdata - (char *) enote); + next = ((char *) enote + + ELF_NOTE_NEXT_OFFSET (inote.namesz, inote.descsz, align)); + } + else + { + Elf64_External_VMS_Note *vms_enote; + + /* PR binutils/15191 + Make sure that there is enough data to read. */ + min_notesz = offsetof (Elf64_External_VMS_Note, name); + if (data_remaining < min_notesz) + { + warn (ngettext ("debuginfod: Corrupt note: only %ld byte remains, " + "not enough for a full note\n", + "Corrupt note: only %ld bytes remain, " + "not enough for a full note\n", + data_remaining), + (long) data_remaining); + break; + } + data_remaining -= min_notesz; + + vms_enote = (Elf64_External_VMS_Note *) enote; + inote.type = BYTE_GET (vms_enote->type); + inote.namesz = BYTE_GET (vms_enote->namesz); + inote.namedata = vms_enote->name; + inote.descsz = BYTE_GET (vms_enote->descsz); + inote.descdata = inote.namedata + align_power (inote.namesz, 3); + inote.descpos = offset + (inote.descdata - (char *) enote); + next = inote.descdata + align_power (inote.descsz, 3); + } + + /* Skip malformed notes. */ + if ((size_t) (inote.descdata - inote.namedata) < inote.namesz + || (size_t) (inote.descdata - inote.namedata) > data_remaining + || (size_t) (next - inote.descdata) < inote.descsz + || ((size_t) (next - inote.descdata) + > data_remaining - (size_t) (inote.descdata - inote.namedata))) + { + warn (_("debuginfod: note with invalid namesz and/or descsz found\n")); + warn (_(" type: 0x%lx, namesize: 0x%08lx, descsize: 0x%08lx, alignment: %u\n"), + inote.type, inote.namesz, inote.descsz, (int) align); + continue; + } + + /* Check if this is the build-id note. If so then convert the build-id + bytes to a hex string. */ + if (inote.namesz > 0 + && const_strneq (inote.namedata, "GNU") + && inote.type == NT_GNU_BUILD_ID) + { + unsigned long j; + char * build_id; + + build_id = malloc (inote.descsz * 2 + 1); + if (build_id == NULL) + return NULL; + + for (j = 0; j < inote.descsz; ++j) + sprintf (build_id + (j * 2), "%02x", inote.descdata[j] & 0xff); + build_id[inote.descsz * 2] = '\0'; + + return (unsigned char *)build_id; + } + } + + return NULL; +} +#endif /* HAVE_LIBDEBUGINFOD */ + /* If this is not NULL, load_debug_section will only look for sections within the list of sections given here. */ static unsigned int * section_subset = NULL; |