diff options
Diffstat (limited to 'binutils/readelf.c')
| -rw-r--r-- | binutils/readelf.c | 252 |
1 files changed, 226 insertions, 26 deletions
diff --git a/binutils/readelf.c b/binutils/readelf.c index 8bf65c7..e51e8b0 100644 --- a/binutils/readelf.c +++ b/binutils/readelf.c @@ -202,6 +202,7 @@ static int do_histogram; static int do_debugging; static int do_arch; static int do_notes; +static int do_archive_index; static int is_32bit_elf; struct group_list @@ -2755,6 +2756,7 @@ static struct option options[] = {"version-info", no_argument, 0, 'V'}, {"use-dynamic", no_argument, 0, 'D'}, {"unwind", no_argument, 0, 'u'}, + {"archive-index", no_argument, 0, 'c'}, {"hex-dump", required_argument, 0, 'x'}, {"debug-dump", optional_argument, 0, OPTION_DEBUG_DUMP}, {"string-dump", required_argument, 0, 'p'}, @@ -2791,6 +2793,7 @@ usage (FILE *stream) -d --dynamic Display the dynamic section (if present)\n\ -V --version-info Display the version sections (if present)\n\ -A --arch-specific Display architecture specific information (if any).\n\ + -c --archive-index Display the symbol/file index in an archive\n\ -D --use-dynamic Use the dynamic section info when displaying symbols\n\ -x --hex-dump=<number|name>\n\ Dump the contents of section <number|name> as bytes\n\ @@ -2881,7 +2884,7 @@ parse_args (int argc, char **argv) usage (stderr); while ((c = getopt_long - (argc, argv, "ersuahnldSDAINtgw::x:i:vVWHp:", options, NULL)) != EOF) + (argc, argv, "ADHINSVWacdeghi:lnp:rstuvw::x:", options, NULL)) != EOF) { char *cp; int section; @@ -2955,6 +2958,9 @@ parse_args (int argc, char **argv) case 'n': do_notes++; break; + case 'c': + do_archive_index++; + break; case 'x': do_dump++; section = strtoul (optarg, & cp, 0); @@ -3143,7 +3149,7 @@ parse_args (int argc, char **argv) if (!do_dynamic && !do_syms && !do_reloc && !do_unwind && !do_sections && !do_segments && !do_header && !do_dump && !do_version && !do_histogram && !do_debugging && !do_arch && !do_notes - && !do_section_groups) + && !do_section_groups && !do_archive_index) usage (stderr); else if (argc < 3) { @@ -9796,8 +9802,8 @@ process_object (char *file_name, FILE *file) return 0; } -/* Process an ELF archive. The file is positioned just after the - ARMAG string. */ +/* Process an ELF archive. + On entry the file is positioned just after the ARMAG string. */ static int process_archive (char *file_name, FILE *file) @@ -9805,6 +9811,10 @@ process_archive (char *file_name, FILE *file) struct ar_hdr arhdr; size_t got; unsigned long size; + unsigned long index_num = 0; + unsigned long *index_array = NULL; + char *sym_table = NULL; + unsigned long sym_size = 0; char *longnames = NULL; unsigned long longnames_size = 0; size_t file_name_size; @@ -9822,28 +9832,124 @@ process_archive (char *file_name, FILE *file) return 1; } + /* See if this is the archive symbol table. */ if (const_strneq (arhdr.ar_name, "/ ") || const_strneq (arhdr.ar_name, "/SYM64/ ")) { - /* This is the archive symbol table. Skip it. - FIXME: We should have an option to dump it. */ size = strtoul (arhdr.ar_size, NULL, 10); - if (fseek (file, size + (size & 1), SEEK_CUR) != 0) + size = size + (size & 1); + + if (do_archive_index) { - error (_("%s: failed to skip archive symbol table\n"), file_name); - return 1; + unsigned long i; + /* A buffer used to hold numbers read in from an archive index. + These are always 4 bytes long and stored in big-endian format. */ +#define SIZEOF_AR_INDEX_NUMBERS 4 + unsigned char integer_buffer[SIZEOF_AR_INDEX_NUMBERS]; + unsigned char * index_buffer; + + /* Check the size of the archive index. */ + if (size < SIZEOF_AR_INDEX_NUMBERS) + { + error (_("%s: the archive index is empty\n"), file_name); + return 1; + } + + /* Read the numer of entries in the archive index. */ + got = fread (integer_buffer, 1, sizeof integer_buffer, file); + if (got != sizeof (integer_buffer)) + { + error (_("%s: failed to read archive index\n"), file_name); + return 1; + } + index_num = byte_get_big_endian (integer_buffer, sizeof integer_buffer); + size -= SIZEOF_AR_INDEX_NUMBERS; + + /* Read in the archive index. */ + if (size < index_num * SIZEOF_AR_INDEX_NUMBERS) + { + error (_("%s: the archive index is supposed to have %ld entries, but the size in the header is too small\n"), + file_name, index_num); + return 1; + } + index_buffer = malloc (index_num * SIZEOF_AR_INDEX_NUMBERS); + if (index_buffer == NULL) + { + error (_("Out of memory whilst trying to read archive symbol index\n")); + return 1; + } + got = fread (index_buffer, SIZEOF_AR_INDEX_NUMBERS, index_num, file); + if (got != index_num) + { + free (index_buffer); + error (_("%s: failed to read archive index\n"), file_name); + ret = 1; + goto out; + } + size -= index_num * SIZEOF_AR_INDEX_NUMBERS; + + /* Convert the index numbers into the host's numeric format. */ + index_array = malloc (index_num * sizeof (* index_array)); + if (index_array == NULL) + { + free (index_buffer); + error (_("Out of memory whilst trying to convert the archive symbol index\n")); + return 1; + } + + for (i = 0; i < index_num; i++) + index_array[i] = byte_get_big_endian ((unsigned char *)(index_buffer + (i * SIZEOF_AR_INDEX_NUMBERS)), + SIZEOF_AR_INDEX_NUMBERS); + free (index_buffer); + + /* The remaining space in the header is taken up by the symbol table. */ + if (size < 1) + { + error (_("%s: the archive has an index but no symbols\n"), file_name); + ret = 1; + goto out; + } + sym_table = malloc (size); + sym_size = size; + if (sym_table == NULL) + { + error (_("Out of memory whilst trying to read archive index symbol table\n")); + ret = 1; + goto out; + } + got = fread (sym_table, 1, size, file); + if (got != size) + { + error (_("%s: failed to read archive index symbol table\n"), file_name); + ret = 1; + goto out; + } + } + else + { + if (fseek (file, size, SEEK_CUR) != 0) + { + error (_("%s: failed to skip archive symbol table\n"), file_name); + return 1; + } } - got = fread (&arhdr, 1, sizeof arhdr, file); + got = fread (& arhdr, 1, sizeof arhdr, file); if (got != sizeof arhdr) { if (got == 0) - return 0; + { + ret = 0; + goto out; + } - error (_("%s: failed to read archive header\n"), file_name); - return 1; + error (_("%s: failed to read archive header following archive index\n"), file_name); + ret = 1; + goto out; } } + else if (do_archive_index) + printf (_("%s has no archive index\n"), file_name); if (const_strneq (arhdr.ar_name, "// ")) { @@ -9851,35 +9957,120 @@ process_archive (char *file_name, FILE *file) names. */ longnames_size = strtoul (arhdr.ar_size, NULL, 10); - longnames = malloc (longnames_size); if (longnames == NULL) { - error (_("Out of memory\n")); - return 1; + error (_("Out of memory reading long symbol names in archive\n")); + ret = 1; + goto out; } if (fread (longnames, longnames_size, 1, file) != 1) { free (longnames); - error (_("%s: failed to read string table\n"), file_name); - return 1; + error (_("%s: failed to read long symbol name string table\n"), file_name); + ret = 1; + goto out; } if ((longnames_size & 1) != 0) getc (file); - got = fread (&arhdr, 1, sizeof arhdr, file); + got = fread (& arhdr, 1, sizeof arhdr, file); if (got != sizeof arhdr) { - free (longnames); - if (got == 0) - return 0; + ret = 0; + else + { + error (_("%s: failed to read archive header following long symbol names\n"), file_name); + ret = 1; + } + goto out; + } + } - error (_("%s: failed to read archive header\n"), file_name); - return 1; + if (do_archive_index) + { + if (sym_table == NULL) + error (_("%s: unable to dump the index as none was found\n"), file_name); + else + { + unsigned int i, j, k, l; + char elf_name[16]; + unsigned long current_pos; + + printf (_("Index of archive %s: (%ld entries, 0x%lx bytes in the symbol table)\n"), + file_name, index_num, sym_size); + current_pos = ftell (file); + + for (i = l = 0; i < index_num; i++) + { + if ((i == 0) || ((i > 0) && (index_array[i] != index_array[i - 1]))) + { + if (fseek (file, index_array[i], SEEK_SET) != 0) + { + error (_("%s: failed to seek to next file name\n"), file_name); + ret = 1; + goto out; + } + got = fread (elf_name, 1, 16, file); + if (got != 16) + { + error (_("%s: failed to read file name\n"), file_name); + ret = 1; + goto out; + } + + if (elf_name[0] == '/') + { + /* We have a long name. */ + k = j = strtoul (elf_name + 1, NULL, 10); + while ((j < longnames_size) && (longnames[j] != '/')) + j++; + longnames[j] = '\0'; + printf (_("Binary %s contains:\n"), longnames + k); + longnames[j] = '/'; + } + else + { + j = 0; + while ((elf_name[j] != '/') && (j < 16)) + j++; + elf_name[j] = '\0'; + printf(_("Binary %s contains:\n"), elf_name); + } + } + if (l >= sym_size) + { + error (_("%s: end of the symbol table reached before the end of the index\n"), + file_name); + break; + } + printf ("\t%s\n", sym_table + l); + l += strlen (sym_table + l) + 1; + } + + if (l < sym_size) + error (_("%s: symbols remain in the index symbol table, but without corresponding entries in the index table\n"), + file_name); + + free (index_array); + index_array = NULL; + free (sym_table); + sym_table = NULL; + if (fseek (file, current_pos, SEEK_SET) != 0) + { + error (_("%s: failed to seek back to start of object files in the archive\n"), file_name); + return 1; + } } + + if (!do_dynamic && !do_syms && !do_reloc && !do_unwind && !do_sections + && !do_segments && !do_header && !do_dump && !do_version + && !do_histogram && !do_debugging && !do_arch && !do_notes + && !do_section_groups) + return 0; /* Archive index only. */ } file_name_size = strlen (file_name); @@ -9963,7 +10154,12 @@ process_archive (char *file_name, FILE *file) } } - if (longnames != 0) + out: + if (index_array != NULL) + free (index_array); + if (sym_table != NULL) + free (sym_table); + if (longnames != NULL) free (longnames); return ret; @@ -10002,7 +10198,7 @@ process_file (char *file_name) if (fread (armag, SARMAG, 1, file) != 1) { - error (_("%s: Failed to read file header\n"), file_name); + error (_("%s: Failed to read file's magic number\n"), file_name); fclose (file); return 1; } @@ -10011,6 +10207,10 @@ process_file (char *file_name) ret = process_archive (file_name, file); else { + if (do_archive_index) + error (_("File %s is not an archive so its index cannot be displayed.\n"), + file_name); + rewind (file); archive_file_size = archive_file_offset = 0; ret = process_object (file_name, file); |