diff options
Diffstat (limited to 'binutils/objdump.c')
| -rw-r--r-- | binutils/objdump.c | 676 |
1 files changed, 474 insertions, 202 deletions
diff --git a/binutils/objdump.c b/binutils/objdump.c index 08b15cd..0963904 100644 --- a/binutils/objdump.c +++ b/binutils/objdump.c @@ -54,6 +54,7 @@ static int dump_reloc_info; /* -r */ static int dump_dynamic_reloc_info; /* -R */ static int dump_ar_hdrs; /* -a */ static int dump_private_headers; /* -p */ +static int prefix_addresses; /* --prefix-addresses */ static int with_line_numbers; /* -l */ static boolean with_source_code; /* -S */ static int show_raw_insn; /* --show-raw-insn */ @@ -124,12 +125,27 @@ display_bfd PARAMS ((bfd *abfd)); static void objdump_print_value PARAMS ((bfd_vma, struct disassemble_info *)); +static asymbol * +find_symbol_for_address PARAMS ((bfd *, asection *, bfd_vma, boolean, long *)); + +static void +objdump_print_addr_with_sym PARAMS ((bfd *, asection *, asymbol *, bfd_vma, + struct disassemble_info *)); + static void objdump_print_address PARAMS ((bfd_vma, struct disassemble_info *)); static void show_line PARAMS ((bfd *, asection *, bfd_vma)); +static void +disassemble_bytes PARAMS ((struct disassemble_info *, disassembler_ftype, + boolean, bfd_byte *, long, long, arelent ***, + arelent **)); + +static void +disassemble_data PARAMS ((bfd *)); + static const char * endian_string PARAMS ((enum bfd_endian)); @@ -149,7 +165,8 @@ Usage: %s [-ahifdDprRtTxsSlw] [-b bfdname] [-m machine] [-j section-name]\n\ [--syms] [--all-headers] [--dynamic-syms] [--dynamic-reloc]\n\ [--wide] [--version] [--help] [--private-headers]\n\ [--start-address=addr] [--stop-address=addr]\n\ - [--show-raw-insn] [-EB|-EL] [--endian={big|little}] objfile...\n\ + [--prefix-addresses] [--show-raw-insn]\n\ + [-EB|-EL] [--endian={big|little}] objfile...\n\ at least one option besides -l (--line-numbers) must be given\n"); list_supported_targets (program_name, stream); if (status == 0) @@ -181,6 +198,7 @@ static struct option long_options[]= {"help", no_argument, NULL, 'H'}, {"info", no_argument, NULL, 'i'}, {"line-numbers", no_argument, NULL, 'l'}, + {"prefix-addresses", no_argument, &prefix_addresses, 1}, {"reloc", no_argument, NULL, 'r'}, {"section", required_argument, NULL, 'j'}, {"section-headers", no_argument, NULL, 'h'}, @@ -437,8 +455,8 @@ compare_symbols (ap, bp) if (! af && bf) return -1; - /* Try to sort global symbols before local symbols before debugging - symbols. */ + /* Try to sort global symbols before local symbols before function + symbols before debugging symbols. */ aflags = a->flags; bflags = b->flags; @@ -450,6 +468,13 @@ compare_symbols (ap, bp) else return -1; } + if ((aflags & BSF_FUNCTION) != (bflags & BSF_FUNCTION)) + { + if ((aflags & BSF_FUNCTION) != 0) + return -1; + else + return 1; + } if ((aflags & BSF_LOCAL) != (bflags & BSF_LOCAL)) { if ((aflags & BSF_LOCAL) != 0) @@ -515,18 +540,24 @@ objdump_print_value (vma, info) sprintf_vma (buf, vma); for (p = buf; *p == '0'; ++p) ; + if (*p == '\0') + --p; (*info->fprintf_func) (info->stream, "%s", p); } -/* Print VMA symbolically to INFO if possible. */ +/* Locate a symbol given a bfd, a section, and a VMA. If REQUIRE_SEC + is true, then always require the symbol to be in the section. This + returns NULL if there is no suitable symbol. If PLACE is not NULL, + then *PLACE is set to the index of the symbol in sorted_syms. */ -static void -objdump_print_address (vma, info) +static asymbol * +find_symbol_for_address (abfd, sec, vma, require_sec, place) + bfd *abfd; + asection *sec; bfd_vma vma; - struct disassemble_info *info; + boolean require_sec; + long *place; { - char buf[30]; - /* @@ Would it speed things up to cache the last two symbols returned, and maybe their address ranges? For many processors, only one memory operand can be present at a time, so the 2-entry cache wouldn't be @@ -537,11 +568,8 @@ objdump_print_address (vma, info) long max = sorted_symcount; long thisplace; - sprintf_vma (buf, vma); - (*info->fprintf_func) (info->stream, "%s", buf); - if (sorted_symcount < 1) - return; + return NULL; /* Perform a binary search looking for the closest symbol to the required value. We are searching the range (min, max]. */ @@ -572,102 +600,150 @@ objdump_print_address (vma, info) == bfd_asymbol_value (sorted_syms[thisplace - 1]))) --thisplace; - { - /* If the file is relocateable, and the symbol could be from this - section, prefer a symbol from this section over symbols from - others, even if the other symbol's value might be closer. + /* If the file is relocateable, and the symbol could be from this + section, prefer a symbol from this section over symbols from + others, even if the other symbol's value might be closer. - Note that this may be wrong for some symbol references if the - sections have overlapping memory ranges, but in that case there's - no way to tell what's desired without looking at the relocation - table. */ - struct objdump_disasm_info *aux; - long i; - - aux = (struct objdump_disasm_info *) info->application_data; - if (sorted_syms[thisplace]->section != aux->sec - && (aux->require_sec - || ((aux->abfd->flags & HAS_RELOC) != 0 - && vma >= bfd_get_section_vma (aux->abfd, aux->sec) - && vma < (bfd_get_section_vma (aux->abfd, aux->sec) - + bfd_section_size (aux->abfd, aux->sec))))) - { - for (i = thisplace + 1; i < sorted_symcount; i++) - { - if (bfd_asymbol_value (sorted_syms[i]) - != bfd_asymbol_value (sorted_syms[thisplace])) + Note that this may be wrong for some symbol references if the + sections have overlapping memory ranges, but in that case there's + no way to tell what's desired without looking at the relocation + table. */ + + if (sorted_syms[thisplace]->section != sec + && (require_sec + || ((abfd->flags & HAS_RELOC) != 0 + && vma >= bfd_get_section_vma (abfd, sec) + && vma < (bfd_get_section_vma (abfd, sec) + + bfd_section_size (abfd, sec))))) + { + long i; + + for (i = thisplace + 1; i < sorted_symcount; i++) + { + if (bfd_asymbol_value (sorted_syms[i]) + != bfd_asymbol_value (sorted_syms[thisplace])) + break; + } + --i; + for (; i >= 0; i--) + { + if (sorted_syms[i]->section == sec + && (i == 0 + || sorted_syms[i - 1]->section != sec + || (bfd_asymbol_value (sorted_syms[i]) + != bfd_asymbol_value (sorted_syms[i - 1])))) + { + thisplace = i; break; - } - --i; - for (; i >= 0; i--) - { - if (sorted_syms[i]->section == aux->sec - && (i == 0 - || sorted_syms[i - 1]->section != aux->sec - || (bfd_asymbol_value (sorted_syms[i]) - != bfd_asymbol_value (sorted_syms[i - 1])))) - { - thisplace = i; - break; - } - } + } + } - if (sorted_syms[thisplace]->section != aux->sec) - { - /* We didn't find a good symbol with a smaller value. - Look for one with a larger value. */ - for (i = thisplace + 1; i < sorted_symcount; i++) - { - if (sorted_syms[i]->section == aux->sec) - { - thisplace = i; - break; - } - } - } + if (sorted_syms[thisplace]->section != sec) + { + /* We didn't find a good symbol with a smaller value. + Look for one with a larger value. */ + for (i = thisplace + 1; i < sorted_symcount; i++) + { + if (sorted_syms[i]->section == sec) + { + thisplace = i; + break; + } + } + } - if (sorted_syms[thisplace]->section != aux->sec - && (aux->require_sec - || ((aux->abfd->flags & HAS_RELOC) != 0 - && vma >= bfd_get_section_vma (aux->abfd, aux->sec) - && vma < (bfd_get_section_vma (aux->abfd, aux->sec) - + bfd_section_size (aux->abfd, aux->sec))))) - { - bfd_vma secaddr; + if (sorted_syms[thisplace]->section != sec + && (require_sec + || ((abfd->flags & HAS_RELOC) != 0 + && vma >= bfd_get_section_vma (abfd, sec) + && vma < (bfd_get_section_vma (abfd, sec) + + bfd_section_size (abfd, sec))))) + { + /* There is no suitable symbol. */ + return NULL; + } + } - (*info->fprintf_func) (info->stream, " <%s", - bfd_get_section_name (aux->abfd, aux->sec)); - secaddr = bfd_get_section_vma (aux->abfd, aux->sec); - if (vma < secaddr) - { - (*info->fprintf_func) (info->stream, "-"); - objdump_print_value (secaddr - vma, info); - } - else if (vma > secaddr) - { - (*info->fprintf_func) (info->stream, "+"); - objdump_print_value (vma - secaddr, info); - } - (*info->fprintf_func) (info->stream, ">"); - return; - } - } - } + if (place != NULL) + *place = thisplace; + + return sorted_syms[thisplace]; +} + +/* Print an address to INFO symbolically. */ + +static void +objdump_print_addr_with_sym (abfd, sec, sym, vma, info) + bfd *abfd; + asection *sec; + asymbol *sym; + bfd_vma vma; + struct disassemble_info *info; +{ + char buf[30]; + + sprintf_vma (buf, vma); + (*info->fprintf_func) (info->stream, "%s", buf); - (*info->fprintf_func) (info->stream, " <%s", sorted_syms[thisplace]->name); - if (bfd_asymbol_value (sorted_syms[thisplace]) > vma) + if (sym == NULL) { - (*info->fprintf_func) (info->stream, "-"); - objdump_print_value (bfd_asymbol_value (sorted_syms[thisplace]) - vma, - info); + bfd_vma secaddr; + + (*info->fprintf_func) (info->stream, " <%s", + bfd_get_section_name (abfd, sec)); + secaddr = bfd_get_section_vma (abfd, sec); + if (vma < secaddr) + { + (*info->fprintf_func) (info->stream, "-"); + objdump_print_value (secaddr - vma, info); + } + else if (vma > secaddr) + { + (*info->fprintf_func) (info->stream, "+"); + objdump_print_value (vma - secaddr, info); + } + (*info->fprintf_func) (info->stream, ">"); } - else if (vma > bfd_asymbol_value (sorted_syms[thisplace])) + else { - (*info->fprintf_func) (info->stream, "+"); - objdump_print_value (vma - bfd_asymbol_value (sorted_syms[thisplace]), - info); + (*info->fprintf_func) (info->stream, " <%s", sym->name); + if (bfd_asymbol_value (sym) > vma) + { + (*info->fprintf_func) (info->stream, "-"); + objdump_print_value (bfd_asymbol_value (sym) - vma, info); + } + else if (vma > bfd_asymbol_value (sym)) + { + (*info->fprintf_func) (info->stream, "+"); + objdump_print_value (vma - bfd_asymbol_value (sym), info); + } + (*info->fprintf_func) (info->stream, ">"); } - (*info->fprintf_func) (info->stream, ">"); +} + +/* Print VMA symbolically to INFO if possible. */ + +static void +objdump_print_address (vma, info) + bfd_vma vma; + struct disassemble_info *info; +{ + struct objdump_disasm_info *aux; + asymbol *sym; + + if (sorted_symcount < 1) + { + char buf[30]; + + sprintf_vma (buf, vma); + (*info->fprintf_func) (info->stream, "%s", buf); + return; + } + + aux = (struct objdump_disasm_info *) info->application_data; + sym = find_symbol_for_address (aux->abfd, aux->sec, vma, aux->require_sec, + (long *) NULL); + objdump_print_addr_with_sym (aux->abfd, aux->sec, sym, vma, info); } /* Hold the last function name and the last line number we displayed @@ -910,18 +986,256 @@ objdump_sprintf (va_alist) } #endif +/* The number of zeroes we want to see before we start skipping them. + The number is arbitrarily chosen. */ + +#define SKIP_ZEROES (8) + +/* The number of zeroes to skip at the end of a section. If the + number of zeroes at the end is between SKIP_ZEROES_AT_END and + SKIP_ZEROES, they will be disassembled. If there are fewer than + SKIP_ZEROES_AT_END, they will be skipped. This is a heuristic + attempt to avoid disassembling zeroes inserted by section + alignment. */ + +#define SKIP_ZEROES_AT_END (3) + +/* Disassemble some data in memory between given values. */ + +static void +disassemble_bytes (info, disassemble_fn, insns, data, start, stop, relppp, + relppend) + struct disassemble_info *info; + disassembler_ftype disassemble_fn; + boolean insns; + bfd_byte *data; + long start; + long stop; + arelent ***relppp; + arelent **relppend; +{ + struct objdump_disasm_info *aux; + asection *section; + int bytes_per_line; + boolean done_dot; + long i; + + aux = (struct objdump_disasm_info *) info->application_data; + section = aux->sec; + + if (insns) + bytes_per_line = 4; + else + bytes_per_line = 16; + + info->insn_info_valid = 0; + + done_dot = false; + i = start; + while (i < stop) + { + long z; + int bytes; + boolean need_nl = false; + + /* If we see more than SKIP_ZEROES bytes of zeroes, we just + print `...'. */ + for (z = i; z < stop; z++) + if (data[z] != 0) + break; + if ((info->insn_info_valid == 0 + || info->branch_delay_insns == 0) + && (z - i >= SKIP_ZEROES + || (z == stop && z - i < SKIP_ZEROES_AT_END))) + { + printf ("\t...\n"); + + /* If there are more nonzero bytes to follow, we only skip + zeroes in multiples of 4, to try to avoid running over + the start of an instruction which happens to start with + zero. */ + if (z != stop) + z = i + ((z - i) &~ 3); + + bytes = z - i; + } + else + { + char buf[1000]; + SFILE sfile; + int pb = 0; + + done_dot = false; + + if (with_line_numbers || with_source_code) + show_line (aux->abfd, section, i); + + if (! prefix_addresses) + printf ("%6lx:\t", (unsigned long) (i - start)); + else + { + aux->require_sec = true; + objdump_print_address (section->vma + i, info); + aux->require_sec = false; + putchar (' '); + } + + if (insns) + { + sfile.buffer = sfile.current = buf; + info->fprintf_func = (fprintf_ftype) objdump_sprintf; + info->stream = (FILE *) &sfile; + info->bytes_per_line = 0; + bytes = (*disassemble_fn) (section->vma + i, info); + info->fprintf_func = (fprintf_ftype) fprintf; + info->stream = stdout; + if (info->bytes_per_line != 0) + bytes_per_line = info->bytes_per_line; + if (bytes < 0) + break; + } + else + { + long j; + + bytes = bytes_per_line; + if (i + bytes > stop) + bytes = stop - i; + + for (j = i; j < i + bytes; ++j) + { + if (isprint (data[j])) + buf[j - i] = data[j]; + else + buf[j - i] = '.'; + } + buf[j - i] = '\0'; + } + + if (! prefix_addresses || show_raw_insn) + { + long j; + + /* If ! prefix_addresses and ! wide_output, we print + four bytes per line. */ + pb = bytes; + if (pb > bytes_per_line && ! prefix_addresses && ! wide_output) + pb = bytes_per_line; + + for (j = i; j < i + pb; ++j) + { + printf ("%02x", (unsigned) data[j]); + putchar (' '); + } + + for (; pb < bytes_per_line; ++pb) + printf (" "); + + /* Separate raw data from instruction by extra space. */ + if (insns) + putchar ('\t'); + else + printf (" "); + } + + printf ("%s", buf); + + if (! prefix_addresses || show_raw_insn) + { + while (pb < bytes) + { + long j; + + putchar ('\n'); + j = i + pb; + printf ("%6lx:\t", (unsigned long) (j - start)); + pb += bytes_per_line; + if (pb > bytes) + pb = bytes; + for (; j < i + pb; ++j) + { + printf ("%02x", (unsigned) data[j]); + putchar (' '); + } + } + } + + if (!wide_output) + putchar ('\n'); + else + need_nl = true; + } + + if (dump_reloc_info + && (section->flags & SEC_RELOC) != 0) + { + while ((*relppp) < relppend + && ((**relppp)->address >= (bfd_vma) i + && (**relppp)->address < (bfd_vma) i + bytes)) + { + arelent *q; + const char *sym_name; + + q = **relppp; + + if (wide_output) + putchar ('\t'); + else + printf ("\t\t\t"); + + objdump_print_value (section->vma + q->address - start, info); + + printf (": %s\t", q->howto->name); + + if (q->sym_ptr_ptr != NULL + && *q->sym_ptr_ptr != NULL) + { + sym_name = bfd_asymbol_name (*q->sym_ptr_ptr); + if (sym_name == NULL || *sym_name == '\0') + { + asection *sym_sec; + + sym_sec = bfd_get_section (*q->sym_ptr_ptr); + sym_name = bfd_get_section_name (abfd, sym_sec); + if (sym_name == NULL || *sym_name == '\0') + sym_name = "*unknown*"; + } + } + else + sym_name = "*unknown*"; + + printf ("%s", sym_name); + + if (q->addend) + { + printf ("+0x"); + objdump_print_value (q->addend, info); + } + + printf ("\n"); + need_nl = false; + ++(*relppp); + } + } + + if (need_nl) + printf ("\n"); + + i += bytes; + } +} + +/* Disassemble the contents of an object file. */ + static void disassemble_data (abfd) bfd *abfd; { long i; - disassembler_ftype disassemble_fn = 0; /* New style */ + disassembler_ftype disassemble_fn; struct disassemble_info disasm_info; struct objdump_disasm_info aux; asection *section; - boolean done_dot = false; - char buf[200]; - SFILE sfile; print_files = NULL; prev_functionname = NULL; @@ -1061,118 +1375,76 @@ disassemble_data (abfd) if (stop > disasm_info.buffer_length) stop = disasm_info.buffer_length; } - while (i < stop) + + if (prefix_addresses) + disassemble_bytes (&disasm_info, disassemble_fn, true, data, i, stop, + &relpp, relppend); + else { - int bytes; - boolean need_nl = false; - - if (data[i] == 0 - && (i + 1 >= stop - || (data[i + 1] == 0 - && (i + 2 >= stop - || (data[i + 2] == 0 - && (i + 3 >= stop - || data[i + 3] == 0)))))) - { - if (done_dot == false) - { - printf ("...\n"); - done_dot = true; - } - bytes = 4; - } - else + asymbol *sym; + long place; + + sym = find_symbol_for_address (abfd, section, i, true, &place); + ++place; + while (i < stop) { - done_dot = false; - if (with_line_numbers || with_source_code) - show_line (abfd, section, i); - aux.require_sec = true; - objdump_print_address (section->vma + i, &disasm_info); - aux.require_sec = false; - putchar (' '); + asymbol *nextsym; + long nextstop; + boolean insns; - sfile.buffer = sfile.current = buf; - disasm_info.fprintf_func = (fprintf_ftype) objdump_sprintf; - disasm_info.stream = (FILE *) &sfile; - bytes = (*disassemble_fn) (section->vma + i, &disasm_info); - disasm_info.fprintf_func = (fprintf_ftype) fprintf; - disasm_info.stream = stdout; - if (bytes < 0) - break; + disasm_info.symbol = sym; + + printf ("\n"); + objdump_print_addr_with_sym (abfd, section, sym, + section->vma + i, + &disasm_info); + printf (":\n"); - if (show_raw_insn) + if (sym == NULL) + nextsym = NULL; + else { - long j; - for (j = i; j < i + bytes; ++j) - { - printf ("%02x", (unsigned) data[j]); - putchar (' '); - } - /* Separate raw data from instruction by extra space. */ - putchar (' '); + while (place < sorted_symcount + && (sorted_syms[place]->section != section + || (bfd_asymbol_value (sorted_syms[place]) + <= bfd_asymbol_value (sym)))) + ++place; + if (place >= sorted_symcount) + nextsym = NULL; + else + nextsym = sorted_syms[place]; } - printf ("%s", sfile.buffer); - - if (!wide_output) - putchar ('\n'); + if (nextsym == NULL) + nextstop = stop; else - need_nl = true; - } - - if (dump_reloc_info - && (section->flags & SEC_RELOC) != 0) - { - while (relpp < relppend - && ((*relpp)->address >= (bfd_vma) i - && (*relpp)->address < (bfd_vma) i + bytes)) { - arelent *q; - const char *sym_name; - - q = *relpp; - - printf ("\t\tRELOC: "); - - printf_vma (section->vma + q->address); - - printf (" %s ", q->howto->name); - - if (q->sym_ptr_ptr != NULL - && *q->sym_ptr_ptr != NULL) - { - sym_name = bfd_asymbol_name (*q->sym_ptr_ptr); - if (sym_name == NULL || *sym_name == '\0') - { - asection *sym_sec; - - sym_sec = bfd_get_section (*q->sym_ptr_ptr); - sym_name = bfd_get_section_name (abfd, sym_sec); - if (sym_name == NULL || *sym_name == '\0') - sym_name = "*unknown*"; - } - } - else - sym_name = "*unknown*"; + nextstop = bfd_asymbol_value (nextsym) - section->vma; + if (nextstop > stop) + nextstop = stop; + } - printf ("%s", sym_name); + /* If a symbol is explicitly marked as being an object + rather than a function, just dump the bytes without + disassembling them. */ + if (disassemble_all + || sym == NULL + || ((sym->flags & BSF_OBJECT) == 0 + && (strstr (bfd_asymbol_name (sym), "gnu_compiled") + == NULL) + && (strstr (bfd_asymbol_name (sym), "gcc2_compiled") + == NULL)) + || (sym->flags & BSF_FUNCTION) != 0) + insns = true; + else + insns = false; - if (q->addend) - { - printf ("+0x"); - printf_vma (q->addend); - } + disassemble_bytes (&disasm_info, disassemble_fn, insns, data, i, + nextstop, &relpp, relppend); - printf ("\n"); - need_nl = false; - ++relpp; - } + i = nextstop; + sym = nextsym; } - - if (need_nl) - printf ("\n"); - - i += bytes; } free (data); |