/* objdump.c -- dump information about an object file. Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. This file is part of GNU Binutils. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "bfd.h" #include "getopt.h" #include "progress.h" #include "bucomm.h" #include #include "dis-asm.h" #include "libiberty.h" #include "demangle.h" #include "debug.h" #include "budbg.h" #ifdef ANSI_PROTOTYPES #include #else #include #endif /* Internal headers for the ELF .stab-dump code - sorry. */ #define BYTES_IN_WORD 32 #include "aout/aout64.h" #ifdef NEED_DECLARATION_FPRINTF /* This is needed by INIT_DISASSEMBLE_INFO. */ extern int fprintf PARAMS ((FILE *, const char *, ...)); #endif /* Exit status. */ static int exit_status = 0; static char *default_target = NULL; /* default at runtime */ static int show_version = 0; /* show the version number */ static int dump_section_contents; /* -s */ static int dump_section_headers; /* -h */ static boolean dump_file_header; /* -f */ static int dump_symtab; /* -t */ static int dump_dynamic_symtab; /* -T */ 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 */ static int dump_stab_section_info; /* --stabs */ static int do_demangle; /* -C, --demangle */ static boolean disassemble; /* -d */ static boolean disassemble_all; /* -D */ static int disassemble_zeroes; /* --disassemble-zeroes */ static boolean formats_info; /* -i */ static char *only; /* -j secname */ static int wide_output; /* -w */ static bfd_vma start_address = (bfd_vma) -1; /* --start-address */ static bfd_vma stop_address = (bfd_vma) -1; /* --stop-address */ static int dump_debugging; /* --debugging */ static bfd_vma adjust_section_vma = 0; /* --adjust-vma */ /* Extra info to pass to the disassembler address printing function. */ struct objdump_disasm_info { bfd *abfd; asection *sec; boolean require_sec; }; /* Architecture to disassemble for, or default if NULL. */ static char *machine = (char *) NULL; /* Target specific options to the disassembler. */ static char *disassembler_options = (char *) NULL; /* Endianness to disassemble for, or default if BFD_ENDIAN_UNKNOWN. */ static enum bfd_endian endian = BFD_ENDIAN_UNKNOWN; /* The symbol table. */ static asymbol **syms; /* Number of symbols in `syms'. */ static long symcount = 0; /* The sorted symbol table. */ static asymbol **sorted_syms; /* Number of symbols in `sorted_syms'. */ static long sorted_symcount = 0; /* The dynamic symbol table. */ static asymbol **dynsyms; /* Number of symbols in `dynsyms'. */ static long dynsymcount = 0; /* Static declarations. */ static void usage PARAMS ((FILE *, int)); static void nonfatal PARAMS ((const char *)); static void display_file PARAMS ((char *filename, char *target)); static void dump_section_header PARAMS ((bfd *, asection *, PTR)); static void dump_headers PARAMS ((bfd *)); static void dump_data PARAMS ((bfd *abfd)); static void dump_relocs PARAMS ((bfd *abfd)); static void dump_dynamic_relocs PARAMS ((bfd * abfd)); static void dump_reloc_set PARAMS ((bfd *, asection *, arelent **, long)); static void dump_symbols PARAMS ((bfd *abfd, boolean dynamic)); static void dump_bfd_header PARAMS ((bfd *)); static void dump_bfd_private_header PARAMS ((bfd *)); static void display_bfd PARAMS ((bfd *abfd)); static void display_target_list PARAMS ((void)); static void display_info_table PARAMS ((int, int)); static void display_target_tables PARAMS ((void)); static void display_info PARAMS ((void)); static void objdump_print_value PARAMS ((bfd_vma, struct disassemble_info *, boolean)); static void objdump_print_symname PARAMS ((bfd *, struct disassemble_info *, asymbol *)); 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 *, boolean)); static void objdump_print_addr PARAMS ((bfd_vma, struct disassemble_info *, boolean)); 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 *, bfd_vma, bfd_vma, arelent ***, arelent **)); static void disassemble_data PARAMS ((bfd *)); static const char * endian_string PARAMS ((enum bfd_endian)); static asymbol ** slurp_symtab PARAMS ((bfd *)); static asymbol ** slurp_dynamic_symtab PARAMS ((bfd *)); static long remove_useless_symbols PARAMS ((asymbol **, long)); static int compare_symbols PARAMS ((const PTR, const PTR)); static int compare_relocs PARAMS ((const PTR, const PTR)); static void dump_stabs PARAMS ((bfd *)); static boolean read_section_stabs PARAMS ((bfd *, const char *, const char *)); static void print_section_stabs PARAMS ((bfd *, const char *, const char *)); static void usage (stream, status) FILE *stream; int status; { fprintf (stream, _("Usage: %s file(s)\n"), program_name); fprintf (stream, _(" At least one of the following switches must be given:\n")); fprintf (stream, _("\ -a --archive-headers Display archive header information\n\ -f --file-headers Display the contents of the overall file header\n\ -p --private-headers Display object format specific file header contents\n\ -h --[section-]headers Display the contents of the section headers\n\ -x --all-headers Display the contents of all headers\n\ -d --disassemble Display assembler contents of executable sections\n\ -D --disassemble-all Display assembler contents of all sections\n\ -S --source Intermix source code with disassembly\n\ -s --full-contents Display the full contents of all sections requested\n\ -g --debugging Display debug information in object file\n\ -G --stabs Display the STABS contents of an ELF format file\n\ -t --syms Display the contents of the symbol table(s)\n\ -T --dynamic-syms Display the contents of the dynamic symbol table\n\ -r --reloc Display the relocation entries in the file\n\ -R --dynamic-reloc Display the dynamic relocation entries in the file\n\ -V --version Display this program's version number\n\ -i --info List object formats and architectures supported\n\ -H --help Display this information\n\ ")); if (status != 2) { fprintf (stream, _("\n The following switches are optional:\n")); fprintf (stream, _("\ -b --target Specify the target object format as \n\ -m --architecture Specify the target architecture as \n\ -j --section Only display information for section \n\ -M --disassembler-options Pass text on to the disassembler\n\ -EB --endian=big Assume big endian format when disassembling\n\ -EL --endian=little Assume little endian format when disassembling\n\ -l --line-numbers Include line numbers and filenames in output\n\ -C --demangle Decode mangled/processed symbol names\n\ -w --wide Format output for more than 80 columns\n\ -z --disassemble-zeroes Do not skip blocks of zeroes when disassembling\n\ --start-address Only process data whoes address is >= \n\ --stop-address Only process data whoes address is <= \n\ --prefix-addresses Print complete address alongside disassembly\n\ --[no-]show-raw-insn Display hex alongside symbolic disassembly\n\ --adjust-vma Add to all displayed section addresses\n\ \n")); list_supported_targets (program_name, stream); disassembler_usage (stream); } if (status == 0) fprintf (stream, _("Report bugs to bug-gnu-utils@gnu.org\n")); exit (status); } /* 150 isn't special; it's just an arbitrary non-ASCII char value. */ #define OPTION_ENDIAN (150) #define OPTION_START_ADDRESS (OPTION_ENDIAN + 1) #define OPTION_STOP_ADDRESS (OPTION_START_ADDRESS + 1) #define OPTION_ADJUST_VMA (OPTION_STOP_ADDRESS + 1) static struct option long_options[]= { {"adjust-vma", required_argument, NULL, OPTION_ADJUST_VMA}, {"all-headers", no_argument, NULL, 'x'}, {"private-headers", no_argument, NULL, 'p'}, {"architecture", required_argument, NULL, 'm'}, {"archive-headers", no_argument, NULL, 'a'}, {"debugging", no_argument, NULL, 'g'}, {"demangle", no_argument, NULL, 'C'}, {"disassemble", no_argument, NULL, 'd'}, {"disassemble-all", no_argument, NULL, 'D'}, {"disassembler-options", required_argument, NULL, 'M'}, {"disassemble-zeroes", no_argument, NULL, 'z'}, {"dynamic-reloc", no_argument, NULL, 'R'}, {"dynamic-syms", no_argument, NULL, 'T'}, {"endian", required_argument, NULL, OPTION_ENDIAN}, {"file-headers", no_argument, NULL, 'f'}, {"full-contents", no_argument, NULL, 's'}, {"headers", no_argument, NULL, 'h'}, {"help", no_argument, NULL, 'H'}, {"info", no_argument, NULL, 'i'}, {"line-numbers", no_argument, NULL, 'l'}, {"no-show-raw-insn", no_argument, &show_raw_insn, -1}, {"prefix-addresses", no_argument, &prefix_addresses, 1}, {"reloc", no_argument, NULL, 'r'}, {"section", required_argument, NULL, 'j'}, {"section-headers", no_argument, NULL, 'h'}, {"show-raw-insn", no_argument, &show_raw_insn, 1}, {"source", no_argument, NULL, 'S'}, {"stabs", no_argument, NULL, 'G'}, {"start-address", required_argument, NULL, OPTION_START_ADDRESS}, {"stop-address", required_argument, NULL, OPTION_STOP_ADDRESS}, {"syms", no_argument, NULL, 't'}, {"target", required_argument, NULL, 'b'}, {"version", no_argument, NULL, 'V'}, {"wide", no_argument, NULL, 'w'}, {0, no_argument, 0, 0} }; static void nonfatal (msg) const char *msg; { bfd_nonfatal (msg); exit_status = 1; } static void dump_section_header (abfd, section, ignored) bfd *abfd ATTRIBUTE_UNUSED; asection *section; PTR ignored ATTRIBUTE_UNUSED; { char *comma = ""; int opb = bfd_octets_per_byte (abfd); printf ("%3d %-13s %08lx ", section->index, bfd_get_section_name (abfd, section), (unsigned long) bfd_section_size (abfd, section) / opb); printf_vma (bfd_get_section_vma (abfd, section)); printf (" "); printf_vma (section->lma); printf (" %08lx 2**%u", section->filepos, bfd_get_section_alignment (abfd, section)); if (! wide_output) printf ("\n "); printf (" "); #define PF(x, y) \ if (section->flags & x) { printf ("%s%s", comma, y); comma = ", "; } PF (SEC_HAS_CONTENTS, "CONTENTS"); PF (SEC_ALLOC, "ALLOC"); PF (SEC_CONSTRUCTOR, "CONSTRUCTOR"); PF (SEC_CONSTRUCTOR_TEXT, "CONSTRUCTOR TEXT"); PF (SEC_CONSTRUCTOR_DATA, "CONSTRUCTOR DATA"); PF (SEC_CONSTRUCTOR_BSS, "CONSTRUCTOR BSS"); PF (SEC_LOAD, "LOAD"); PF (SEC_RELOC, "RELOC"); #ifdef SEC_BALIGN PF (SEC_BALIGN, "BALIGN"); #endif PF (SEC_READONLY, "READONLY"); PF (SEC_CODE, "CODE"); PF (SEC_DATA, "DATA"); PF (SEC_ROM, "ROM"); PF (SEC_DEBUGGING, "DEBUGGING"); PF (SEC_NEVER_LOAD, "NEVER_LOAD"); PF (SEC_EXCLUDE, "EXCLUDE"); PF (SEC_SORT_ENTRIES, "SORT_ENTRIES"); PF (SEC_SMALL_DATA, "SMALL_DATA"); PF (SEC_SHARED, "SHARED"); if ((section->flags & SEC_LINK_ONCE) != 0) { const char *ls; switch (section->flags & SEC_LINK_DUPLICATES) { default: abort (); case SEC_LINK_DUPLICATES_DISCARD: ls = "LINK_ONCE_DISCARD"; break; case SEC_LINK_DUPLICATES_ONE_ONLY: ls = "LINK_ONCE_ONE_ONLY"; break; case SEC_LINK_DUPLICATES_SAME_SIZE: ls = "LINK_ONCE_SAME_SIZE"; break; case SEC_LINK_DUPLICATES_SAME_CONTENTS: ls = "LINK_ONCE_SAME_CONTENTS"; break; } printf ("%s%s", comma, ls); if (section->comdat != NULL) printf (" (COMDAT %s %ld)", section->comdat->name, section->comdat->symbol); comma = ", "; } printf ("\n"); #undef PF } static void dump_headers (abfd) bfd *abfd; { printf (_("Sections:\n")); #ifndef BFD64 printf (_("Idx Name Size VMA LMA File off Algn")); #else printf (_("Idx Name Size VMA LMA File off Algn")); #endif if (wide_output) printf (_(" Flags")); printf ("\n"); bfd_map_over_sections (abfd, dump_section_header, (PTR) NULL); } static asymbol ** slurp_symtab (abfd) bfd *abfd; { asymbol **sy = (asymbol **) NULL; long storage; if (!(bfd_get_file_flags (abfd) & HAS_SYMS)) { fprintf (stderr, _("%s: no symbols\n"), bfd_get_filename (abfd)); symcount = 0; return NULL; } storage = bfd_get_symtab_upper_bound (abfd); if (storage < 0) bfd_fatal (bfd_get_filename (abfd)); if (storage) { sy = (asymbol **) xmalloc (storage); } symcount = bfd_canonicalize_symtab (abfd, sy); if (symcount < 0) bfd_fatal (bfd_get_filename (abfd)); if (symcount == 0) fprintf (stderr, _("%s: no symbols\n"), bfd_get_filename (abfd)); return sy; } /* Read in the dynamic symbols. */ static asymbol ** slurp_dynamic_symtab (abfd) bfd *abfd; { asymbol **sy = (asymbol **) NULL; long storage; storage = bfd_get_dynamic_symtab_upper_bound (abfd); if (storage < 0) { if (!(bfd_get_file_flags (abfd) & DYNAMIC)) { fprintf (stderr, _("%s: %s: not a dynamic object\n"), program_name, bfd_get_filename (abfd)); dynsymcount = 0; return NULL; } bfd_fatal (bfd_get_filename (abfd)); } if (storage) { sy = (asymbol **) xmalloc (storage); } dynsymcount = bfd_canonicalize_dynamic_symtab (abfd, sy); if (dynsymcount < 0) bfd_fatal (bfd_get_filename (abfd)); if (dynsymcount == 0) fprintf (stderr, _("%s: %s: No dynamic symbols\n"), program_name, bfd_get_filename (abfd)); return sy; } /* Filter out (in place) symbols that are useless for disassembly. COUNT is the number of elements in SYMBOLS. Return the number of useful symbols. */ static long remove_useless_symbols (symbols, count) asymbol **symbols; long count; { register asymbol **in_ptr = symbols, **out_ptr = symbols; while (--count >= 0) { asymbol *sym = *in_ptr++; if (sym->name == NULL || sym->name[0] == '\0') continue; if (sym->flags & (BSF_DEBUGGING)) continue; if (bfd_is_und_section (sym->section) || bfd_is_com_section (sym->section)) continue; *out_ptr++ = sym; } return out_ptr - symbols; } /* Sort symbols into value order. */ static int compare_symbols (ap, bp) const PTR ap; const PTR bp; { const asymbol *a = *(const asymbol **)ap; const asymbol *b = *(const asymbol **)bp; const char *an, *bn; size_t anl, bnl; boolean af, bf; flagword aflags, bflags; if (bfd_asymbol_value (a) > bfd_asymbol_value (b)) return 1; else if (bfd_asymbol_value (a) < bfd_asymbol_value (b)) return -1; if (a->section > b->section) return 1; else if (a->section < b->section) return -1; an = bfd_asymbol_name (a); bn = bfd_asymbol_name (b); anl = strlen (an); bnl = strlen (bn); /* The symbols gnu_compiled and gcc2_compiled convey no real information, so put them after other symbols with the same value. */ af = (strstr (an, "gnu_compiled") != NULL || strstr (an, "gcc2_compiled") != NULL); bf = (strstr (bn, "gnu_compiled") != NULL || strstr (bn, "gcc2_compiled") != NULL); if (af && ! bf) return 1; if (! af && bf) return -1; /* We use a heuristic for the file name, to try to sort it after more useful symbols. It may not work on non Unix systems, but it doesn't really matter; the only difference is precisely which symbol names get printed. */ #define file_symbol(s, sn, snl) \ (((s)->flags & BSF_FILE) != 0 \ || ((sn)[(snl) - 2] == '.' \ && ((sn)[(snl) - 1] == 'o' \ || (sn)[(snl) - 1] == 'a'))) af = file_symbol (a, an, anl); bf = file_symbol (b, bn, bnl); if (af && ! bf) return 1; if (! af && bf) return -1; /* Try to sort global symbols before local symbols before function symbols before debugging symbols. */ aflags = a->flags; bflags = b->flags; if ((aflags & BSF_DEBUGGING) != (bflags & BSF_DEBUGGING)) { if ((aflags & BSF_DEBUGGING) != 0) return 1; 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) return 1; else return -1; } if ((aflags & BSF_GLOBAL) != (bflags & BSF_GLOBAL)) { if ((aflags & BSF_GLOBAL) != 0) return -1; else return 1; } /* Symbols that start with '.' might be section names, so sort them after symbols that don't start with '.'. */ if (an[0] == '.' && bn[0] != '.') return 1; if (an[0] != '.' && bn[0] == '.') return -1; /* Finally, if we can't distinguish them in any other way, try to get consistent results by sorting the symbols by name. */ return strcmp (an, bn); } /* Sort relocs into address order. */ static int compare_relocs (ap, bp) const PTR ap; const PTR bp; { const arelent *a = *(const arelent **)ap; const arelent *b = *(const arelent **)bp; if (a->address > b->address) return 1; else if (a->address < b->address) return -1; /* So that associated relocations tied to the same address show up in the correct order, we don't do any further sorting. */ if (a > b) return 1; else if (a < b) return -1; else return 0; } /* Print VMA to STREAM. If SKIP_ZEROES is true, omit leading zeroes. */ static void objdump_print_value (vma, info, skip_zeroes) bfd_vma vma; struct disassemble_info *info; boolean skip_zeroes; { char buf[30]; char *p; sprintf_vma (buf, vma); if (! skip_zeroes) p = buf; else { for (p = buf; *p == '0'; ++p) ; if (*p == '\0') --p; } (*info->fprintf_func) (info->stream, "%s", p); } /* Print the name of a symbol. */ static void objdump_print_symname (abfd, info, sym) bfd *abfd; struct disassemble_info *info; asymbol *sym; { char *alloc; const char *name; const char *print; alloc = NULL; name = bfd_asymbol_name (sym); if (! do_demangle || name[0] == '\0') print = name; else { /* Demangle the name. */ if (bfd_get_symbol_leading_char (abfd) == name[0]) ++name; alloc = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS); if (alloc == NULL) print = name; else print = alloc; } if (info != NULL) (*info->fprintf_func) (info->stream, "%s", print); else printf ("%s", print); if (alloc != NULL) free (alloc); } /* 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 asymbol * find_symbol_for_address (abfd, sec, vma, require_sec, place) bfd *abfd; asection *sec; bfd_vma vma; boolean require_sec; long *place; { /* @@ 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 constantly churned by code doing heavy memory accesses. */ /* Indices in `sorted_syms'. */ long min = 0; long max = sorted_symcount; long thisplace; int opb = bfd_octets_per_byte (abfd); if (sorted_symcount < 1) return NULL; /* Perform a binary search looking for the closest symbol to the required value. We are searching the range (min, max]. */ while (min + 1 < max) { asymbol *sym; thisplace = (max + min) / 2; sym = sorted_syms[thisplace]; if (bfd_asymbol_value (sym) > vma) max = thisplace; else if (bfd_asymbol_value (sym) < vma) min = thisplace; else { min = thisplace; break; } } /* The symbol we want is now in min, the low end of the range we were searching. If there are several symbols with the same value, we want the first one. */ thisplace = min; while (thisplace > 0 && (bfd_asymbol_value (sorted_syms[thisplace]) == 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. 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) / opb)))) { 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; } } 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 != 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; } } 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, skip_zeroes) bfd *abfd; asection *sec; asymbol *sym; bfd_vma vma; struct disassemble_info *info; boolean skip_zeroes; { objdump_print_value (vma, info, skip_zeroes); if (sym == NULL) { 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, "-0x"); objdump_print_value (secaddr - vma, info, true); } else if (vma > secaddr) { (*info->fprintf_func) (info->stream, "+0x"); objdump_print_value (vma - secaddr, info, true); } (*info->fprintf_func) (info->stream, ">"); } else { (*info->fprintf_func) (info->stream, " <"); objdump_print_symname (abfd, info, sym); if (bfd_asymbol_value (sym) > vma) { (*info->fprintf_func) (info->stream, "-0x"); objdump_print_value (bfd_asymbol_value (sym) - vma, info, true); } else if (vma > bfd_asymbol_value (sym)) { (*info->fprintf_func) (info->stream, "+0x"); objdump_print_value (vma - bfd_asymbol_value (sym), info, true); } (*info->fprintf_func) (info->stream, ">"); } } /* Print VMA to INFO, symbolically if possible. If SKIP_ZEROES is true, don't output leading zeroes. */ static void objdump_print_addr (vma, info, skip_zeroes) bfd_vma vma; struct disassemble_info *info; boolean skip_zeroes; { struct objdump_disasm_info *aux; asymbol *sym; if (sorted_symcount < 1) { (*info->fprintf_func) (info->stream, "0x"); objdump_print_value (vma, info, skip_zeroes); 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, skip_zeroes); } /* Print VMA to INFO. This function is passed to the disassembler routine. */ static void objdump_print_address (vma, info) bfd_vma vma; struct disassemble_info *info; { objdump_print_addr (vma, info, ! prefix_addresses); } /* Determine of the given address has a symbol associated with it. */ static int objdump_symbol_at_address (vma, info) bfd_vma vma; struct disassemble_info * info; { struct objdump_disasm_info * aux; asymbol * sym; /* No symbols - do not bother checking. */ if (sorted_symcount < 1) return 0; aux = (struct objdump_disasm_info *) info->application_data; sym = find_symbol_for_address (aux->abfd, aux->sec, vma, aux->require_sec, (long *) NULL); return (sym != NULL && (bfd_asymbol_value (sym) == vma)); } /* Hold the last function name and the last line number we displayed in a disassembly. */ static char *prev_functionname; static unsigned int prev_line; /* We keep a list of all files that we have seen when doing a dissassembly with source, so that we know how much of the file to display. This can be important for inlined functions. */ struct print_file_list { struct print_file_list *next; char *filename; unsigned int line; FILE *f; }; static struct print_file_list *print_files; /* The number of preceding context lines to show when we start displaying a file for the first time. */ #define SHOW_PRECEDING_CONTEXT_LINES (5) /* Skip ahead to a given line in a file, optionally printing each line. */ static void skip_to_line PARAMS ((struct print_file_list *, unsigned int, boolean)); static void skip_to_line (p, line, show) struct print_file_list *p; unsigned int line; boolean show; { while (p->line < line) { char buf[100]; if (fgets (buf, sizeof buf, p->f) == NULL) { fclose (p->f); p->f = NULL; break; } if (show) printf ("%s", buf); if (strchr (buf, '\n') != NULL) ++p->line; } } /* Show the line number, or the source line, in a dissassembly listing. */ static void show_line (abfd, section, addr_offset) bfd *abfd; asection *section; bfd_vma addr_offset; { CONST char *filename; CONST char *functionname; unsigned int line; if (! with_line_numbers && ! with_source_code) return; if (! bfd_find_nearest_line (abfd, section, syms, addr_offset, &filename, &functionname, &line)) return; if (filename != NULL && *filename == '\0') filename = NULL; if (functionname != NULL && *functionname == '\0') functionname = NULL; if (with_line_numbers) { if (functionname != NULL && (prev_functionname == NULL || strcmp (functionname, prev_functionname) != 0)) printf ("%s():\n", functionname); if (line > 0 && line != prev_line) printf ("%s:%u\n", filename == NULL ? "???" : filename, line); } if (with_source_code && filename != NULL && line > 0) { struct print_file_list **pp, *p; for (pp = &print_files; *pp != NULL; pp = &(*pp)->next) if (strcmp ((*pp)->filename, filename) == 0) break; p = *pp; if (p != NULL) { if (p != print_files) { int l; /* We have reencountered a file name which we saw earlier. This implies that either we are dumping out code from an included file, or the same file was linked in more than once. There are two common cases of an included file: inline functions in a header file, and a bison or flex skeleton file. In the former case we want to just start printing (but we back up a few lines to give context); in the latter case we want to continue from where we left off. I can't think of a good way to distinguish the cases, so I used a heuristic based on the file name. */ if (strcmp (p->filename + strlen (p->filename) - 2, ".h") != 0) l = p->line; else { l = line - SHOW_PRECEDING_CONTEXT_LINES; if (l <= 0) l = 1; } if (p->f == NULL) { p->f = fopen (p->filename, "r"); p->line = 0; } if (p->f != NULL) skip_to_line (p, l, false); if (print_files->f != NULL) { fclose (print_files->f); print_files->f = NULL; } } if (p->f != NULL) { skip_to_line (p, line, true); *pp = p->next; p->next = print_files; print_files = p; } } else { FILE *f; f = fopen (filename, "r"); if (f != NULL) { int l; p = ((struct print_file_list *) xmalloc (sizeof (struct print_file_list))); p->filename = xmalloc (strlen (filename) + 1); strcpy (p->filename, filename); p->line = 0; p->f = f; if (print_files != NULL && print_files->f != NULL) { fclose (print_files->f); print_files->f = NULL; } p->next = print_files; print_files = p; l = line - SHOW_PRECEDING_CONTEXT_LINES; if (l <= 0) l = 1; skip_to_line (p, l, false); if (p->f != NULL) skip_to_line (p, line, true); } } } if (functionname != NULL && (prev_functionname == NULL || strcmp (functionname, prev_functionname) != 0)) { if (prev_functionname != NULL) free (prev_functionname); prev_functionname = xmalloc (strlen (functionname) + 1); strcpy (prev_functionname, functionname); } if (line > 0 && line != prev_line) prev_line = line; } /* Pseudo FILE object for strings. */ typedef struct { char *buffer; size_t size; char *current; } SFILE; /* sprintf to a "stream" */ static int #ifdef ANSI_PROTOTYPES objdump_sprintf (SFILE *f, const char *format, ...) #else objdump_sprintf (va_alist) va_dcl #endif { #ifndef ANSI_PROTOTYPES SFILE *f; const char *format; #endif char *buf; va_list args; size_t n; #ifdef ANSI_PROTOTYPES va_start (args, format); #else va_start (args); f = va_arg (args, SFILE *); format = va_arg (args, const char *); #endif vasprintf (&buf, format, args); va_end (args); if (buf == NULL) { fprintf (stderr, _("Out of virtual memory\n")); exit (1); } n = strlen (buf); while ((size_t) ((f->buffer + f->size) - f->current) < n + 1) { size_t curroff; curroff = f->current - f->buffer; f->size *= 2; f->buffer = xrealloc (f->buffer, f->size); f->current = f->buffer + curroff; } memcpy (f->current, buf, n); f->current += n; f->current[0] = '\0'; free (buf); return n; } /* 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_offset, stop_offset, relppp, relppend) struct disassemble_info *info; disassembler_ftype disassemble_fn; boolean insns; bfd_byte *data; bfd_vma start_offset; bfd_vma stop_offset; arelent ***relppp; arelent **relppend; { struct objdump_disasm_info *aux; asection *section; int octets_per_line; boolean done_dot; int skip_addr_chars; bfd_vma addr_offset; int opb = info->octets_per_byte; aux = (struct objdump_disasm_info *) info->application_data; section = aux->sec; if (insns) octets_per_line = 4; else octets_per_line = 16; /* Figure out how many characters to skip at the start of an address, to make the disassembly look nicer. We discard leading zeroes in chunks of 4, ensuring that there is always a leading zero remaining. */ skip_addr_chars = 0; if (! prefix_addresses) { char buf[30]; char *s; sprintf_vma (buf, section->vma + bfd_section_size (section->owner, section) / opb); s = buf; while (s[0] == '0' && s[1] == '0' && s[2] == '0' && s[3] == '0' && s[4] == '0') { skip_addr_chars += 4; s += 4; } } info->insn_info_valid = 0; done_dot = false; addr_offset = start_offset; while (addr_offset < stop_offset) { bfd_vma z; int octets = 0; boolean need_nl = false; /* If we see more than SKIP_ZEROES octets of zeroes, we just print `...'. */ for (z = addr_offset * opb; z < stop_offset * opb; z++) if (data[z] != 0) break; if (! disassemble_zeroes && (info->insn_info_valid == 0 || info->branch_delay_insns == 0) && (z - addr_offset * opb >= SKIP_ZEROES || (z == stop_offset * opb && z - addr_offset * opb < SKIP_ZEROES_AT_END))) { printf ("\t...\n"); /* If there are more nonzero octets 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_offset * opb) z = addr_offset * opb + ((z - addr_offset * opb) &~ 3); octets = z - addr_offset * opb; } else { char buf[50]; SFILE sfile; int bpc = 0; int pb = 0; done_dot = false; if (with_line_numbers || with_source_code) show_line (aux->abfd, section, addr_offset); if (! prefix_addresses) { char *s; sprintf_vma (buf, section->vma + addr_offset); for (s = buf + skip_addr_chars; *s == '0'; s++) *s = ' '; if (*s == '\0') *--s = '0'; printf ("%s:\t", buf + skip_addr_chars); } else { aux->require_sec = true; objdump_print_address (section->vma + addr_offset, info); aux->require_sec = false; putchar (' '); } if (insns) { sfile.size = 120; sfile.buffer = xmalloc (sfile.size); sfile.current = sfile.buffer; info->fprintf_func = (fprintf_ftype) objdump_sprintf; info->stream = (FILE *) &sfile; info->bytes_per_line = 0; info->bytes_per_chunk = 0; /* FIXME: This is wrong. It tests the number of octets in the last instruction, not the current one. */ if (*relppp < relppend && (**relppp)->address >= addr_offset && (**relppp)->address < addr_offset + octets / opb) info->flags = INSN_HAS_RELOC; else info->flags = 0; octets = (*disassemble_fn) (section->vma + addr_offset, info); info->fprintf_func = (fprintf_ftype) fprintf; info->stream = stdout; if (info->bytes_per_line != 0) octets_per_line = info->bytes_per_line; if (octets < 0) { if (sfile.current != sfile.buffer) printf ("%s\n", sfile.buffer); free (sfile.buffer); break; } } else { bfd_vma j; octets = octets_per_line; if (addr_offset + octets / opb > stop_offset) octets = (stop_offset - addr_offset) * opb; for (j = addr_offset * opb; j < addr_offset * opb + octets; ++j) { if (isprint (data[j])) buf[j - addr_offset * opb] = data[j]; else buf[j - addr_offset * opb] = '.'; } buf[j - addr_offset * opb] = '\0'; } if (prefix_addresses ? show_raw_insn > 0 : show_raw_insn >= 0) { bfd_vma j; /* If ! prefix_addresses and ! wide_output, we print octets_per_line octets per line. */ pb = octets; if (pb > octets_per_line && ! prefix_addresses && ! wide_output) pb = octets_per_line; if (info->bytes_per_chunk) bpc = info->bytes_per_chunk; else bpc = 1; for (j = addr_offset * opb; j < addr_offset * opb + pb; j += bpc) { int k; if (bpc > 1 && info->display_endian == BFD_ENDIAN_LITTLE) { for (k = bpc - 1; k >= 0; k--) printf ("%02x", (unsigned) data[j + k]); putchar (' '); } else { for (k = 0; k < bpc; k++) printf ("%02x", (unsigned) data[j + k]); putchar (' '); } } for (; pb < octets_per_line; pb += bpc) { int k; for (k = 0; k < bpc; k++) printf (" "); putchar (' '); } /* Separate raw data from instruction by extra space. */ if (insns) putchar ('\t'); else printf (" "); } if (! insns) printf ("%s", buf); else { printf ("%s", sfile.buffer); free (sfile.buffer); } if (prefix_addresses ? show_raw_insn > 0 : show_raw_insn >= 0) { while (pb < octets) { bfd_vma j; char *s; putchar ('\n'); j = addr_offset * opb + pb; sprintf_vma (buf, section->vma + j / opb); for (s = buf + skip_addr_chars; *s == '0'; s++) *s = ' '; if (*s == '\0') *--s = '0'; printf ("%s:\t", buf + skip_addr_chars); pb += octets_per_line; if (pb > octets) pb = octets; for (; j < addr_offset * opb + pb; j += bpc) { int k; if (bpc > 1 && info->display_endian == BFD_ENDIAN_LITTLE) { for (k = bpc - 1; k >= 0; k--) printf ("%02x", (unsigned) data[j + k]); putchar (' '); } else { for (k = 0; k < bpc; k++) printf ("%02x", (unsigned) data[j + k]); 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) addr_offset && (**relppp)->address < (bfd_vma) addr_offset + octets / opb)) { arelent *q; q = **relppp; if (wide_output) putchar ('\t'); else printf ("\t\t\t"); objdump_print_value (section->vma + q->address, info, true); printf (": %s\t", q->howto->name); if (q->sym_ptr_ptr == NULL || *q->sym_ptr_ptr == NULL) printf ("*unknown*"); else { const char *sym_name; sym_name = bfd_asymbol_name (*q->sym_ptr_ptr); if (sym_name != NULL && *sym_name != '\0') objdump_print_symname (aux->abfd, info, *q->sym_ptr_ptr); else { asection *sym_sec; sym_sec = bfd_get_section (*q->sym_ptr_ptr); sym_name = bfd_get_section_name (aux->abfd, sym_sec); if (sym_name == NULL || *sym_name == '\0') sym_name = "*unknown*"; printf ("%s", sym_name); } } if (q->addend) { printf ("+0x"); objdump_print_value (q->addend, info, true); } printf ("\n"); need_nl = false; ++(*relppp); } } if (need_nl) printf ("\n"); addr_offset += octets / opb; } } /* Disassemble the contents of an object file. */ static void disassemble_data (abfd) bfd *abfd; { long addr_offset; disassembler_ftype disassemble_fn; struct disassemble_info disasm_info; struct objdump_disasm_info aux; asection *section; int opb = bfd_octets_per_byte (abfd); print_files = NULL; prev_functionname = NULL; prev_line = -1; /* We make a copy of syms to sort. We don't want to sort syms because that will screw up the relocs. */ sorted_syms = (asymbol **) xmalloc (symcount * sizeof (asymbol *)); memcpy (sorted_syms, syms, symcount * sizeof (asymbol *)); sorted_symcount = remove_useless_symbols (sorted_syms, symcount); /* Sort the symbols into section and symbol order */ qsort (sorted_syms, sorted_symcount, sizeof (asymbol *), compare_symbols); INIT_DISASSEMBLE_INFO(disasm_info, stdout, fprintf); disasm_info.application_data = (PTR) &aux; aux.abfd = abfd; aux.require_sec = false; disasm_info.print_address_func = objdump_print_address; disasm_info.symbol_at_address_func = objdump_symbol_at_address; disasm_info.octets_per_byte = opb; if (machine != (char *) NULL) { const bfd_arch_info_type *info = bfd_scan_arch (machine); if (info == NULL) { fprintf (stderr, _("%s: Can't use supplied machine %s\n"), program_name, machine); exit (1); } abfd->arch_info = info; } if (endian != BFD_ENDIAN_UNKNOWN) { struct bfd_target *xvec; xvec = (struct bfd_target *) xmalloc (sizeof (struct bfd_target)); memcpy (xvec, abfd->xvec, sizeof (struct bfd_target)); xvec->byteorder = endian; abfd->xvec = xvec; } disassemble_fn = disassembler (abfd); if (!disassemble_fn) { fprintf (stderr, _("%s: Can't disassemble for architecture %s\n"), program_name, bfd_printable_arch_mach (bfd_get_arch (abfd), 0)); exit_status = 1; return; } disasm_info.flavour = bfd_get_flavour (abfd); disasm_info.arch = bfd_get_arch (abfd); disasm_info.mach = bfd_get_mach (abfd); disasm_info.disassembler_options = disassembler_options; if (bfd_big_endian (abfd)) disasm_info.display_endian = disasm_info.endian = BFD_ENDIAN_BIG; else if (bfd_little_endian (abfd)) disasm_info.display_endian = disasm_info.endian = BFD_ENDIAN_LITTLE; else /* ??? Aborting here seems too drastic. We could default to big or little instead. */ disasm_info.endian = BFD_ENDIAN_UNKNOWN; for (section = abfd->sections; section != (asection *) NULL; section = section->next) { bfd_byte *data = NULL; bfd_size_type datasize = 0; arelent **relbuf = NULL; arelent **relpp = NULL; arelent **relppend = NULL; long stop_offset; asymbol *sym = NULL; long place = 0; if ((section->flags & SEC_LOAD) == 0 || (! disassemble_all && only == NULL && (section->flags & SEC_CODE) == 0)) continue; if (only != (char *) NULL && strcmp (only, section->name) != 0) continue; if (dump_reloc_info && (section->flags & SEC_RELOC) != 0) { long relsize; relsize = bfd_get_reloc_upper_bound (abfd, section); if (relsize < 0) bfd_fatal (bfd_get_filename (abfd)); if (relsize > 0) { long relcount; relbuf = (arelent **) xmalloc (relsize); relcount = bfd_canonicalize_reloc (abfd, section, relbuf, syms); if (relcount < 0) bfd_fatal (bfd_get_filename (abfd)); /* Sort the relocs by address. */ qsort (relbuf, relcount, sizeof (arelent *), compare_relocs); relpp = relbuf; relppend = relpp + relcount; /* Skip over the relocs belonging to addresses below the start address. */ if (start_address != (bfd_vma) -1) { while (relpp < relppend && (*relpp)->address < start_address) ++relpp; } } } printf (_("Disassembly of section %s:\n"), section->name); datasize = bfd_get_section_size_before_reloc (section); if (datasize == 0) continue; data = (bfd_byte *) xmalloc ((size_t) datasize); bfd_get_section_contents (abfd, section, data, 0, datasize); aux.sec = section; disasm_info.buffer = data; disasm_info.buffer_vma = section->vma; disasm_info.buffer_length = datasize; if (start_address == (bfd_vma) -1 || start_address < disasm_info.buffer_vma) addr_offset = 0; else addr_offset = start_address - disasm_info.buffer_vma; if (stop_address == (bfd_vma) -1) stop_offset = datasize / opb; else { if (stop_address < disasm_info.buffer_vma) stop_offset = 0; else stop_offset = stop_address - disasm_info.buffer_vma; if (stop_offset > disasm_info.buffer_length / opb) stop_offset = disasm_info.buffer_length / opb; } sym = find_symbol_for_address (abfd, section, section->vma + addr_offset, true, &place); while (addr_offset < stop_offset) { asymbol *nextsym; long nextstop_offset; boolean insns; if (sym != NULL && bfd_asymbol_value (sym) <= section->vma + addr_offset) { int x; for (x = place; (x < sorted_symcount && bfd_asymbol_value (sorted_syms[x]) <= section->vma + addr_offset); ++x) continue; disasm_info.symbols = & sorted_syms[place]; disasm_info.num_symbols = x - place; } else disasm_info.symbols = NULL; if (! prefix_addresses) { printf ("\n"); objdump_print_addr_with_sym (abfd, section, sym, section->vma + addr_offset, &disasm_info, false); printf (":\n"); } if (sym != NULL && bfd_asymbol_value (sym) > section->vma + addr_offset) nextsym = sym; else if (sym == NULL) nextsym = NULL; else { /* Search forward for the next appropriate symbol in SECTION. Note that all the symbols are sorted together into one big array, and that some sections may have overlapping addresses. */ 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]; } if (sym != NULL && bfd_asymbol_value (sym) > section->vma + addr_offset) { nextstop_offset = bfd_asymbol_value (sym) - section->vma; if (nextstop_offset > stop_offset) nextstop_offset = stop_offset; } else if (nextsym == NULL) nextstop_offset = stop_offset; else { nextstop_offset = bfd_asymbol_value (nextsym) - section->vma; if (nextstop_offset > stop_offset) nextstop_offset = stop_offset; } /* 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 || bfd_asymbol_value (sym) > section->vma + addr_offset || ((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; disassemble_bytes (&disasm_info, disassemble_fn, insns, data, addr_offset, nextstop_offset, &relpp, relppend); addr_offset = nextstop_offset; sym = nextsym; } free (data); if (relbuf != NULL) free (relbuf); } free (sorted_syms); } /* Define a table of stab values and print-strings. We wish the initializer could be a direct-mapped table, but instead we build one the first time we need it. */ static void dump_section_stabs PARAMS ((bfd *abfd, char *stabsect_name, char *strsect_name)); /* Dump the stabs sections from an object file that has a section that uses Sun stabs encoding. */ static void dump_stabs (abfd) bfd *abfd; { dump_section_stabs (abfd, ".stab", ".stabstr"); dump_section_stabs (abfd, ".stab.excl", ".stab.exclstr"); dump_section_stabs (abfd, ".stab.index", ".stab.indexstr"); dump_section_stabs (abfd, "$GDB_SYMBOLS$", "$GDB_STRINGS$"); } static bfd_byte *stabs; static bfd_size_type stab_size; static char *strtab; static bfd_size_type stabstr_size; /* Read ABFD's stabs section STABSECT_NAME into `stabs' and string table section STRSECT_NAME into `strtab'. If the section exists and was read, allocate the space and return true. Otherwise return false. */ static boolean read_section_stabs (abfd, stabsect_name, strsect_name) bfd *abfd; const char *stabsect_name; const char *strsect_name; { asection *stabsect, *stabstrsect; stabsect = bfd_get_section_by_name (abfd, stabsect_name); if (0 == stabsect) { printf (_("No %s section present\n\n"), stabsect_name); return false; } stabstrsect = bfd_get_section_by_name (abfd, strsect_name); if (0 == stabstrsect) { fprintf (stderr, _("%s: %s has no %s section\n"), program_name, bfd_get_filename (abfd), strsect_name); exit_status = 1; return false; } stab_size = bfd_section_size (abfd, stabsect); stabstr_size = bfd_section_size (abfd, stabstrsect); stabs = (bfd_byte *) xmalloc (stab_size); strtab = (char *) xmalloc (stabstr_size); if (! bfd_get_section_contents (abfd, stabsect, (PTR) stabs, 0, stab_size)) { fprintf (stderr, _("%s: Reading %s section of %s failed: %s\n"), program_name, stabsect_name, bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); free (stabs); free (strtab); exit_status = 1; return false; } if (! bfd_get_section_contents (abfd, stabstrsect, (PTR) strtab, 0, stabstr_size)) { fprintf (stderr, _("%s: Reading %s section of %s failed: %s\n"), program_name, strsect_name, bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); free (stabs); free (strtab); exit_status = 1; return false; } return true; } /* Stabs entries use a 12 byte format: 4 byte string table index 1 byte stab type 1 byte stab other field 2 byte stab desc field 4 byte stab value FIXME: This will have to change for a 64 bit object format. */ #define STRDXOFF (0) #define TYPEOFF (4) #define OTHEROFF (5) #define DESCOFF (6) #define VALOFF (8) #define STABSIZE (12) /* Print ABFD's stabs section STABSECT_NAME (in `stabs'), using string table section STRSECT_NAME (in `strtab'). */ static void print_section_stabs (abfd, stabsect_name, strsect_name) bfd *abfd; const char *stabsect_name; const char *strsect_name ATTRIBUTE_UNUSED; { int i; unsigned file_string_table_offset = 0, next_file_string_table_offset = 0; bfd_byte *stabp, *stabs_end; stabp = stabs; stabs_end = stabp + stab_size; printf (_("Contents of %s section:\n\n"), stabsect_name); printf ("Symnum n_type n_othr n_desc n_value n_strx String\n"); /* Loop through all symbols and print them. We start the index at -1 because there is a dummy symbol on the front of stabs-in-{coff,elf} sections that supplies sizes. */ for (i = -1; stabp < stabs_end; stabp += STABSIZE, i++) { const char *name; unsigned long strx; unsigned char type, other; unsigned short desc; bfd_vma value; strx = bfd_h_get_32 (abfd, stabp + STRDXOFF); type = bfd_h_get_8 (abfd, stabp + TYPEOFF); other = bfd_h_get_8 (abfd, stabp + OTHEROFF); desc = bfd_h_get_16 (abfd, stabp + DESCOFF); value = bfd_h_get_32 (abfd, stabp + VALOFF); printf ("\n%-6d ", i); /* Either print the stab name, or, if unnamed, print its number again (makes consistent formatting for tools like awk). */ name = bfd_get_stab_name (type); if (name != NULL) printf ("%-6s", name); else if (type == N_UNDF) printf ("HdrSym"); else printf ("%-6d", type); printf (" %-6d %-6d ", other, desc); printf_vma (value); printf (" %-6lu", strx); /* Symbols with type == 0 (N_UNDF) specify the length of the string table associated with this file. We use that info to know how to relocate the *next* file's string table indices. */ if (type == N_UNDF) { file_string_table_offset = next_file_string_table_offset; next_file_string_table_offset += value; } else { /* Using the (possibly updated) string table offset, print the string (if any) associated with this symbol. */ if ((strx + file_string_table_offset) < stabstr_size) printf (" %s", &strtab[strx + file_string_table_offset]); else printf (" *"); } } printf ("\n\n"); } static void dump_section_stabs (abfd, stabsect_name, strsect_name) bfd *abfd; char *stabsect_name; char *strsect_name; { asection *s; /* Check for section names for which stabsect_name is a prefix, to handle .stab0, etc. */ for (s = abfd->sections; s != NULL; s = s->next) { int len; len = strlen (stabsect_name); /* If the prefix matches, and the files section name ends with a nul or a digit, then we match. I.e., we want either an exact match or a section followed by a number. */ if (strncmp (stabsect_name, s->name, len) == 0 && (s->name[len] == '\000' || isdigit ((unsigned char) s->name[len]))) { if (read_section_stabs (abfd, s->name, strsect_name)) { print_section_stabs (abfd, s->name, strsect_name); free (stabs); free (strtab); } } } } static void dump_bfd_header (abfd) bfd *abfd; { char *comma = ""; printf (_("architecture: %s, "), bfd_printable_arch_mach (bfd_get_arch (abfd), bfd_get_mach (abfd))); printf (_("flags 0x%08x:\n"), abfd->flags); #define PF(x, y) if (abfd->flags & x) {printf("%s%s", comma, y); comma=", ";} PF (HAS_RELOC, "HAS_RELOC"); PF (EXEC_P, "EXEC_P"); PF (HAS_LINENO, "HAS_LINENO"); PF (HAS_DEBUG, "HAS_DEBUG"); PF (HAS_SYMS, "HAS_SYMS"); PF (HAS_LOCALS, "HAS_LOCALS"); PF (DYNAMIC, "DYNAMIC"); PF (WP_TEXT, "WP_TEXT"); PF (D_PAGED, "D_PAGED"); PF (BFD_IS_RELAXABLE, "BFD_IS_RELAXABLE"); printf (_("\nstart address 0x")); printf_vma (abfd->start_address); printf ("\n"); } static void dump_bfd_private_header (abfd) bfd *abfd; { bfd_print_private_bfd_data (abfd, stdout); } /* Dump selected contents of ABFD */ static void dump_bfd (abfd) bfd *abfd; { /* If we are adjusting section VMA's, change them all now. Changing the BFD information is a hack. However, we must do it, or bfd_find_nearest_line will not do the right thing. */ if (adjust_section_vma != 0) { asection *s; for (s = abfd->sections; s != NULL; s = s->next) { s->vma += adjust_section_vma; s->lma += adjust_section_vma; } } printf (_("\n%s: file format %s\n"), bfd_get_filename (abfd), abfd->xvec->name); if (dump_ar_hdrs) print_arelt_descr (stdout, abfd, true); if (dump_file_header) dump_bfd_header (abfd); if (dump_private_headers) dump_bfd_private_header (abfd); putchar ('\n'); if (dump_section_headers) dump_headers (abfd); if (dump_symtab || dump_reloc_info || disassemble || dump_debugging) { syms = slurp_symtab (abfd); } if (dump_dynamic_symtab || dump_dynamic_reloc_info) { dynsyms = slurp_dynamic_symtab (abfd); } if (dump_symtab) dump_symbols (abfd, false); if (dump_dynamic_symtab) dump_symbols (abfd, true); if (dump_stab_section_info) dump_stabs (abfd); if (dump_reloc_info && ! disassemble) dump_relocs (abfd); if (dump_dynamic_reloc_info) dump_dynamic_relocs (abfd); if (dump_section_contents) dump_data (abfd); if (disassemble) disassemble_data (abfd); if (dump_debugging) { PTR dhandle; dhandle = read_debugging_info (abfd, syms, symcount); if (dhandle != NULL) { if (! print_debugging_info (stdout, dhandle)) { fprintf (stderr, _("%s: printing debugging information failed\n"), bfd_get_filename (abfd)); exit_status = 1; } } } if (syms) { free (syms); syms = NULL; } if (dynsyms) { free (dynsyms); dynsyms = NULL; } } static void display_bfd (abfd) bfd *abfd; { char **matching; if (bfd_check_format_matches (abfd, bfd_object, &matching)) { dump_bfd (abfd); return; } if (bfd_get_error () == bfd_error_file_ambiguously_recognized) { nonfatal (bfd_get_filename (abfd)); list_matching_formats (matching); free (matching); return; } if (bfd_get_error () != bfd_error_file_not_recognized) { nonfatal (bfd_get_filename (abfd)); return; } if (bfd_check_format_matches (abfd, bfd_core, &matching)) { dump_bfd (abfd); return; } nonfatal (bfd_get_filename (abfd)); if (bfd_get_error () == bfd_error_file_ambiguously_recognized) { list_matching_formats (matching); free (matching); } } static void display_file (filename, target) char *filename; char *target; { bfd *file, *arfile = (bfd *) NULL; file = bfd_openr (filename, target); if (file == NULL) { nonfatal (filename); return; } if (bfd_check_format (file, bfd_archive) == true) { bfd *last_arfile = NULL; printf (_("In archive %s:\n"), bfd_get_filename (file)); for (;;) { bfd_set_error (bfd_error_no_error); arfile = bfd_openr_next_archived_file (file, arfile); if (arfile == NULL) { if (bfd_get_error () != bfd_error_no_more_archived_files) nonfatal (bfd_get_filename (file)); break; } display_bfd (arfile); if (last_arfile != NULL) bfd_close (last_arfile); last_arfile = arfile; } if (last_arfile != NULL) bfd_close (last_arfile); } else display_bfd (file); bfd_close (file); } /* Actually display the various requested regions */ static void dump_data (abfd) bfd *abfd; { asection *section; bfd_byte *data = 0; bfd_size_type datasize = 0; bfd_size_type addr_offset; bfd_size_type start_offset, stop_offset; int opb = bfd_octets_per_byte (abfd); for (section = abfd->sections; section != NULL; section = section->next) { int onaline = 16; if (only == (char *) NULL || strcmp (only, section->name) == 0) { if (section->flags & SEC_HAS_CONTENTS) { printf (_("Contents of section %s:\n"), section->name); if (bfd_section_size (abfd, section) == 0) continue; data = (bfd_byte *) xmalloc ((size_t) bfd_section_size (abfd, section)); datasize = bfd_section_size (abfd, section); bfd_get_section_contents (abfd, section, (PTR) data, 0, bfd_section_size (abfd, section)); if (start_address == (bfd_vma) -1 || start_address < section->vma) start_offset = 0; else start_offset = start_address - section->vma; if (stop_address == (bfd_vma) -1) stop_offset = bfd_section_size (abfd, section) / opb; else { if (stop_address < section->vma) stop_offset = 0; else stop_offset = stop_address - section->vma; if (stop_offset > bfd_section_size (abfd, section) / opb) stop_offset = bfd_section_size (abfd, section) / opb; } for (addr_offset = start_offset; addr_offset < stop_offset; addr_offset += onaline) { bfd_size_type j; printf (" %04lx ", (unsigned long int) (addr_offset + section->vma)); for (j = addr_offset * opb; j < addr_offset * opb + onaline; j++) { if (j < stop_offset * opb) printf ("%02x", (unsigned) (data[j])); else printf (" "); if ((j & 3) == 3) printf (" "); } printf (" "); for (j = addr_offset; j < addr_offset * opb + onaline; j++) { if (j >= stop_offset * opb) printf (" "); else printf ("%c", isprint (data[j]) ? data[j] : '.'); } putchar ('\n'); } free (data); } } } } /* Should perhaps share code and display with nm? */ static void dump_symbols (abfd, dynamic) bfd *abfd ATTRIBUTE_UNUSED; boolean dynamic; { asymbol **current; long max; long count; if (dynamic) { current = dynsyms; max = dynsymcount; if (max == 0) return; printf ("DYNAMIC SYMBOL TABLE:\n"); } else { current = syms; max = symcount; if (max == 0) return; printf ("SYMBOL TABLE:\n"); } for (count = 0; count < max; count++) { if (*current) { bfd *cur_bfd = bfd_asymbol_bfd (*current); if (cur_bfd != NULL) { const char *name; char *alloc; name = bfd_asymbol_name (*current); alloc = NULL; if (do_demangle && name != NULL && *name != '\0') { const char *n; /* If we want to demangle the name, we demangle it here, and temporarily clobber it while calling bfd_print_symbol. FIXME: This is a gross hack. */ n = name; if (bfd_get_symbol_leading_char (cur_bfd) == *n) ++n; alloc = cplus_demangle (n, DMGL_ANSI | DMGL_PARAMS); if (alloc != NULL) (*current)->name = alloc; else (*current)->name = n; } bfd_print_symbol (cur_bfd, stdout, *current, bfd_print_symbol_all); (*current)->name = name; if (alloc != NULL) free (alloc); printf ("\n"); } } current++; } printf ("\n"); printf ("\n"); } static void dump_relocs (abfd) bfd *abfd; { arelent **relpp; long relcount; asection *a; for (a = abfd->sections; a != (asection *) NULL; a = a->next) { long relsize; if (bfd_is_abs_section (a)) continue; if (bfd_is_und_section (a)) continue; if (bfd_is_com_section (a)) continue; if (only) { if (strcmp (only, a->name)) continue; } else if ((a->flags & SEC_RELOC) == 0) continue; relsize = bfd_get_reloc_upper_bound (abfd, a); if (relsize < 0) bfd_fatal (bfd_get_filename (abfd)); printf ("RELOCATION RECORDS FOR [%s]:", a->name); if (relsize == 0) { printf (" (none)\n\n"); } else { relpp = (arelent **) xmalloc (relsize); relcount = bfd_canonicalize_reloc (abfd, a, relpp, syms); if (relcount < 0) bfd_fatal (bfd_get_filename (abfd)); else if (relcount == 0) { printf (" (none)\n\n"); } else { printf ("\n"); dump_reloc_set (abfd, a, relpp, relcount); printf ("\n\n"); } free (relpp); } } } static void dump_dynamic_relocs (abfd) bfd *abfd; { long relsize; arelent **relpp; long relcount; relsize = bfd_get_dynamic_reloc_upper_bound (abfd); if (relsize < 0) bfd_fatal (bfd_get_filename (abfd)); printf ("DYNAMIC RELOCATION RECORDS"); if (relsize == 0) { printf (" (none)\n\n"); } else { relpp = (arelent **) xmalloc (relsize); relcount = bfd_canonicalize_dynamic_reloc (abfd, relpp, dynsyms); if (relcount < 0) bfd_fatal (bfd_get_filename (abfd)); else if (relcount == 0) { printf (" (none)\n\n"); } else { printf ("\n"); dump_reloc_set (abfd, (asection *) NULL, relpp, relcount); printf ("\n\n"); } free (relpp); } } static void dump_reloc_set (abfd, sec, relpp, relcount) bfd *abfd; asection *sec; arelent **relpp; long relcount; { arelent **p; char *last_filename, *last_functionname; unsigned int last_line; /* Get column headers lined up reasonably. */ { static int width; if (width == 0) { char buf[30]; sprintf_vma (buf, (bfd_vma) -1); width = strlen (buf) - 7; } printf ("OFFSET %*s TYPE %*s VALUE \n", width, "", 12, ""); } last_filename = NULL; last_functionname = NULL; last_line = 0; for (p = relpp; relcount && *p != (arelent *) NULL; p++, relcount--) { arelent *q = *p; const char *filename, *functionname; unsigned int line; const char *sym_name; const char *section_name; if (start_address != (bfd_vma) -1 && q->address < start_address) continue; if (stop_address != (bfd_vma) -1 && q->address > stop_address) continue; if (with_line_numbers && sec != NULL && bfd_find_nearest_line (abfd, sec, syms, q->address, &filename, &functionname, &line)) { if (functionname != NULL && (last_functionname == NULL || strcmp (functionname, last_functionname) != 0)) { printf ("%s():\n", functionname); if (last_functionname != NULL) free (last_functionname); last_functionname = xstrdup (functionname); } if (line > 0 && (line != last_line || (filename != NULL && last_filename != NULL && strcmp (filename, last_filename) != 0))) { printf ("%s:%u\n", filename == NULL ? "???" : filename, line); last_line = line; if (last_filename != NULL) free (last_filename); if (filename == NULL) last_filename = NULL; else last_filename = xstrdup (filename); } } if (q->sym_ptr_ptr && *q->sym_ptr_ptr) { sym_name = (*(q->sym_ptr_ptr))->name; section_name = (*(q->sym_ptr_ptr))->section->name; } else { sym_name = NULL; section_name = NULL; } if (sym_name) { printf_vma (q->address); if (q->howto->name) printf (" %-16s ", q->howto->name); else printf (" %-16d ", q->howto->type); objdump_print_symname (abfd, (struct disassemble_info *) NULL, *q->sym_ptr_ptr); } else { if (section_name == (CONST char *) NULL) section_name = "*unknown*"; printf_vma (q->address); printf (" %-16s [%s]", q->howto->name, section_name); } if (q->addend) { printf ("+0x"); printf_vma (q->addend); } printf ("\n"); } } /* The length of the longest architecture name + 1. */ #define LONGEST_ARCH sizeof("rs6000:6000") static const char * endian_string (endian) enum bfd_endian endian; { if (endian == BFD_ENDIAN_BIG) return "big endian"; else if (endian == BFD_ENDIAN_LITTLE) return "little endian"; else return "endianness unknown"; } /* List the targets that BFD is configured to support, each followed by its endianness and the architectures it supports. */ static void display_target_list () { extern bfd_target *bfd_target_vector[]; char *dummy_name; int t; dummy_name = choose_temp_base (); for (t = 0; bfd_target_vector[t]; t++) { bfd_target *p = bfd_target_vector[t]; bfd *abfd = bfd_openw (dummy_name, p->name); int a; printf ("%s\n (header %s, data %s)\n", p->name, endian_string (p->header_byteorder), endian_string (p->byteorder)); if (abfd == NULL) { nonfatal (dummy_name); continue; } if (! bfd_set_format (abfd, bfd_object)) { if (bfd_get_error () != bfd_error_invalid_operation) nonfatal (p->name); continue; } for (a = (int) bfd_arch_obscure + 1; a < (int) bfd_arch_last; a++) if (bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0)) printf (" %s\n", bfd_printable_arch_mach ((enum bfd_architecture) a, 0)); } unlink (dummy_name); free (dummy_name); } /* Print a table showing which architectures are supported for entries FIRST through LAST-1 of bfd_target_vector (targets across, architectures down). */ static void display_info_table (first, last) int first; int last; { extern bfd_target *bfd_target_vector[]; int t, a; char *dummy_name; /* Print heading of target names. */ printf ("\n%*s", (int) LONGEST_ARCH, " "); for (t = first; t < last && bfd_target_vector[t]; t++) printf ("%s ", bfd_target_vector[t]->name); putchar ('\n'); dummy_name = choose_temp_base (); for (a = (int) bfd_arch_obscure + 1; a < (int) bfd_arch_last; a++) if (strcmp (bfd_printable_arch_mach (a, 0), "UNKNOWN!") != 0) { printf ("%*s ", (int) LONGEST_ARCH - 1, bfd_printable_arch_mach (a, 0)); for (t = first; t < last && bfd_target_vector[t]; t++) { bfd_target *p = bfd_target_vector[t]; boolean ok = true; bfd *abfd = bfd_openw (dummy_name, p->name); if (abfd == NULL) { nonfatal (p->name); ok = false; } if (ok) { if (! bfd_set_format (abfd, bfd_object)) { if (bfd_get_error () != bfd_error_invalid_operation) nonfatal (p->name); ok = false; } } if (ok) { if (! bfd_set_arch_mach (abfd, a, 0)) ok = false; } if (ok) printf ("%s ", p->name); else { int l = strlen (p->name); while (l--) putchar ('-'); putchar (' '); } } putchar ('\n'); } unlink (dummy_name); free (dummy_name); } /* Print tables of all the target-architecture combinations that BFD has been configured to support. */ static void display_target_tables () { int t, columns; extern bfd_target *bfd_target_vector[]; char *colum; columns = 0; colum = getenv ("COLUMNS"); if (colum != NULL) columns = atoi (colum); if (columns == 0) columns = 80; t = 0; while (bfd_target_vector[t] != NULL) { int oldt = t, wid; wid = LONGEST_ARCH + strlen (bfd_target_vector[t]->name) + 1; ++t; while (wid < columns && bfd_target_vector[t] != NULL) { int newwid; newwid = wid + strlen (bfd_target_vector[t]->name) + 1; if (newwid >= columns) break; wid = newwid; ++t; } display_info_table (oldt, t); } } static void display_info () { printf (_("BFD header file version %s\n"), BFD_VERSION); display_target_list (); display_target_tables (); } int main (argc, argv) int argc; char **argv; { int c; char *target = default_target; boolean seenflag = false; #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) setlocale (LC_MESSAGES, ""); #endif bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); program_name = *argv; xmalloc_set_program_name (program_name); START_PROGRESS (program_name, 0); bfd_init (); set_default_bfd_target (); while ((c = getopt_long (argc, argv, "pib:m:M:VCdDlfahHrRtTxsSj:wE:zgG", long_options, (int *) 0)) != EOF) { switch (c) { case 0: break; /* we've been given a long option */ case 'm': machine = optarg; break; case 'M': disassembler_options = optarg; break; case 'j': only = optarg; break; case 'l': with_line_numbers = true; break; case 'b': target = optarg; break; case 'C': do_demangle = true; break; case 'w': wide_output = true; break; case OPTION_ADJUST_VMA: adjust_section_vma = parse_vma (optarg, "--adjust-vma"); break; case OPTION_START_ADDRESS: start_address = parse_vma (optarg, "--start-address"); break; case OPTION_STOP_ADDRESS: stop_address = parse_vma (optarg, "--stop-address"); break; case 'E': if (strcmp (optarg, "B") == 0) endian = BFD_ENDIAN_BIG; else if (strcmp (optarg, "L") == 0) endian = BFD_ENDIAN_LITTLE; else { fprintf (stderr, _("%s: unrecognized -E option\n"), program_name); usage (stderr, 1); } break; case OPTION_ENDIAN: if (strncmp (optarg, "big", strlen (optarg)) == 0) endian = BFD_ENDIAN_BIG; else if (strncmp (optarg, "little", strlen (optarg)) == 0) endian = BFD_ENDIAN_LITTLE; else { fprintf (stderr, _("%s: unrecognized --endian type `%s'\n"), program_name, optarg); usage (stderr, 1); } break; case 'f': dump_file_header = true; seenflag = true; break; case 'i': formats_info = true; seenflag = true; break; case 'p': dump_private_headers = true; seenflag = true; break; case 'x': dump_private_headers = true; dump_symtab = true; dump_reloc_info = true; dump_file_header = true; dump_ar_hdrs = true; dump_section_headers = true; seenflag = true; break; case 't': dump_symtab = true; seenflag = true; break; case 'T': dump_dynamic_symtab = true; seenflag = true; break; case 'd': disassemble = true; seenflag = true; break; case 'z': disassemble_zeroes = true; break; case 'D': disassemble = true; disassemble_all = true; seenflag = true; break; case 'S': disassemble = true; with_source_code = true; seenflag = true; break; case 'g': dump_debugging = 1; seenflag = true; break; case 'G': dump_stab_section_info = true; seenflag = true; break; case 's': dump_section_contents = true; seenflag = true; break; case 'r': dump_reloc_info = true; seenflag = true; break; case 'R': dump_dynamic_reloc_info = true; seenflag = true; break; case 'a': dump_ar_hdrs = true; seenflag = true; break; case 'h': dump_section_headers = true; seenflag = true; break; case 'H': usage (stdout, 0); seenflag = true; case 'V': show_version = true; seenflag = true; break; default: usage (stderr, 1); } } if (show_version) print_version ("objdump"); if (seenflag == false) usage (stderr, 2); if (formats_info) display_info (); else { if (optind == argc) display_file ("a.out", target); else for (; optind < argc;) display_file (argv[optind++], target); } END_PROGRESS (program_name); return exit_status; }