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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [binutils/] [objdump.c] - Rev 58
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/* objdump.c -- dump information about an object file. Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ /* Objdump overview. Objdump displays information about one or more object files, either on their own, or inside libraries. It is commonly used as a disassembler, but it can also display information about file headers, symbol tables, relocations, debugging directives and more. The flow of execution is as follows: 1. Command line arguments are checked for control switches and the information to be displayed is selected. 2. Any remaining arguments are assumed to be object files, and they are processed in order by display_bfd(). If the file is an archive each of its elements is processed in turn. 3. The file's target architecture and binary file format are determined by bfd_check_format(). If they are recognised, then dump_bfd() is called. 4. dump_bfd() in turn calls separate functions to display the requested item(s) of information(s). For example disassemble_data() is called if a disassembly has been requested. When disassembling the code loops through blocks of instructions bounded by symbols, calling disassemble_bytes() on each block. The actual disassembling is done by the libopcodes library, via a function pointer supplied by the disassembler() function. */ #include "sysdep.h" #include "bfd.h" #include "elf-bfd.h" #include "progress.h" #include "bucomm.h" #include "elfcomm.h" #include "dwarf.h" #include "getopt.h" #include "safe-ctype.h" #include "dis-asm.h" #include "libiberty.h" #include "demangle.h" #include "filenames.h" #include "debug.h" #include "budbg.h" #include "objdump.h" #ifdef HAVE_MMAP #include <sys/mman.h> #endif #include <sys/stat.h> /* Internal headers for the ELF .stab-dump code - sorry. */ #define BYTES_IN_WORD 32 #include "aout/aout64.h" /* Exit status. */ static int exit_status = 0; static char *default_target = NULL; /* Default at runtime. */ /* The following variables are set based on arguments passed on the command line. */ static int show_version = 0; /* Show the version number. */ static int dump_section_contents; /* -s */ static int dump_section_headers; /* -h */ static bfd_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 char *dump_private_options; /* -P */ static int prefix_addresses; /* --prefix-addresses */ static int with_line_numbers; /* -l */ static bfd_boolean with_source_code; /* -S */ static int show_raw_insn; /* --show-raw-insn */ static int dump_dwarf_section_info; /* --dwarf */ static int dump_stab_section_info; /* --stabs */ static int do_demangle; /* -C, --demangle */ static bfd_boolean disassemble; /* -d */ static bfd_boolean disassemble_all; /* -D */ static int disassemble_zeroes; /* --disassemble-zeroes */ static bfd_boolean formats_info; /* -i */ static int wide_output; /* -w */ static int insn_width; /* --insn-width */ 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 int dump_debugging_tags; /* --debugging-tags */ static int suppress_bfd_header; static int dump_special_syms = 0; /* --special-syms */ static bfd_vma adjust_section_vma = 0; /* --adjust-vma */ static int file_start_context = 0; /* --file-start-context */ static bfd_boolean display_file_offsets;/* -F */ static const char *prefix; /* --prefix */ static int prefix_strip; /* --prefix-strip */ static size_t prefix_length; /* A structure to record the sections mentioned in -j switches. */ struct only { const char * name; /* The name of the section. */ bfd_boolean seen; /* A flag to indicate that the section has been found in one or more input files. */ struct only * next; /* Pointer to the next structure in the list. */ }; /* Pointer to an array of 'only' structures. This pointer is NULL if the -j switch has not been used. */ static struct only * only_list = NULL; /* Variables for handling include file path table. */ static const char **include_paths; static int include_path_count; /* Extra info to pass to the section disassembler and address printing function. */ struct objdump_disasm_info { bfd * abfd; asection * sec; bfd_boolean require_sec; arelent ** dynrelbuf; long dynrelcount; disassembler_ftype disassemble_fn; arelent * reloc; }; /* Architecture to disassemble for, or default if NULL. */ static char *machine = NULL; /* Target specific options to the disassembler. */ static char *disassembler_options = 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; /* The synthetic symbol table. */ static asymbol *synthsyms; static long synthcount = 0; /* Number of symbols in `dynsyms'. */ static long dynsymcount = 0; static bfd_byte *stabs; static bfd_size_type stab_size; static char *strtab; static bfd_size_type stabstr_size; static bfd_boolean is_relocatable = FALSE; /* Handlers for -P/--private. */ static const struct objdump_private_desc * const objdump_private_vectors[] = { OBJDUMP_PRIVATE_VECTORS NULL }; static void usage (FILE *stream, int status) { fprintf (stream, _("Usage: %s <option(s)> <file(s)>\n"), program_name); fprintf (stream, _(" Display information from object <file(s)>.\n")); 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\ -P, --private=OPT,OPT... Display object format specific 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\ -e, --debugging-tags Display debug information using ctags style\n\ -G, --stabs Display (in raw form) any STABS info in the file\n\ -W[lLiaprmfFsoRt] or\n\ --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,\n\ =frames-interp,=str,=loc,=Ranges,=pubtypes,\n\ =gdb_index,=trace_info,=trace_abbrev,=trace_aranges]\n\ Display DWARF info in the 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\ @<file> Read options from <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) { const struct objdump_private_desc * const *desc; fprintf (stream, _("\n The following switches are optional:\n")); fprintf (stream, _("\ -b, --target=BFDNAME Specify the target object format as BFDNAME\n\ -m, --architecture=MACHINE Specify the target architecture as MACHINE\n\ -j, --section=NAME Only display information for section NAME\n\ -M, --disassembler-options=OPT Pass text OPT 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\ --file-start-context Include context from start of file (with -S)\n\ -I, --include=DIR Add DIR to search list for source files\n\ -l, --line-numbers Include line numbers and filenames in output\n\ -F, --file-offsets Include file offsets when displaying information\n\ -C, --demangle[=STYLE] Decode mangled/processed symbol names\n\ The STYLE, if specified, can be `auto', `gnu',\n\ `lucid', `arm', `hp', `edg', `gnu-v3', `java'\n\ or `gnat'\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=ADDR Only process data whose address is >= ADDR\n\ --stop-address=ADDR Only process data whose address is <= ADDR\n\ --prefix-addresses Print complete address alongside disassembly\n\ --[no-]show-raw-insn Display hex alongside symbolic disassembly\n\ --insn-width=WIDTH Display WIDTH bytes on a single line for -d\n\ --adjust-vma=OFFSET Add OFFSET to all displayed section addresses\n\ --special-syms Include special symbols in symbol dumps\n\ --prefix=PREFIX Add PREFIX to absolute paths for -S\n\ --prefix-strip=LEVEL Strip initial directory names for -S\n")); fprintf (stream, _("\ --dwarf-depth=N Do not display DIEs at depth N or greater\n\ --dwarf-start=N Display DIEs starting with N, at the same depth\n\ or deeper\n\n")); list_supported_targets (program_name, stream); list_supported_architectures (program_name, stream); disassembler_usage (stream); if (objdump_private_vectors[0] != NULL) { fprintf (stream, _("\nOptions supported for -P/--private switch:\n")); for (desc = objdump_private_vectors; *desc != NULL; desc++) (*desc)->help (stream); } } if (REPORT_BUGS_TO[0] && status == 0) fprintf (stream, _("Report bugs to %s.\n"), REPORT_BUGS_TO); exit (status); } /* 150 isn't special; it's just an arbitrary non-ASCII char value. */ enum option_values { OPTION_ENDIAN=150, OPTION_START_ADDRESS, OPTION_STOP_ADDRESS, OPTION_DWARF, OPTION_PREFIX, OPTION_PREFIX_STRIP, OPTION_INSN_WIDTH, OPTION_ADJUST_VMA, OPTION_DWARF_DEPTH, OPTION_DWARF_START }; 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'}, {"private", required_argument, NULL, 'P'}, {"architecture", required_argument, NULL, 'm'}, {"archive-headers", no_argument, NULL, 'a'}, {"debugging", no_argument, NULL, 'g'}, {"debugging-tags", no_argument, NULL, 'e'}, {"demangle", optional_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'}, {"file-offsets", no_argument, NULL, 'F'}, {"file-start-context", no_argument, &file_start_context, 1}, {"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'}, {"special-syms", no_argument, &dump_special_syms, 1}, {"include", required_argument, NULL, 'I'}, {"dwarf", optional_argument, NULL, OPTION_DWARF}, {"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'}, {"prefix", required_argument, NULL, OPTION_PREFIX}, {"prefix-strip", required_argument, NULL, OPTION_PREFIX_STRIP}, {"insn-width", required_argument, NULL, OPTION_INSN_WIDTH}, {"dwarf-depth", required_argument, 0, OPTION_DWARF_DEPTH}, {"dwarf-start", required_argument, 0, OPTION_DWARF_START}, {0, no_argument, 0, 0} }; static void nonfatal (const char *msg) { bfd_nonfatal (msg); exit_status = 1; } /* Returns TRUE if the specified section should be dumped. */ static bfd_boolean process_section_p (asection * section) { struct only * only; if (only_list == NULL) return TRUE; for (only = only_list; only; only = only->next) if (strcmp (only->name, section->name) == 0) { only->seen = TRUE; return TRUE; } return FALSE; } /* Add an entry to the 'only' list. */ static void add_only (char * name) { struct only * only; /* First check to make sure that we do not already have an entry for this name. */ for (only = only_list; only; only = only->next) if (strcmp (only->name, name) == 0) return; only = xmalloc (sizeof * only); only->name = name; only->seen = FALSE; only->next = only_list; only_list = only; } /* Release the memory used by the 'only' list. PR 11225: Issue a warning message for unseen sections. Only do this if none of the sections were seen. This is mainly to support tools like the GAS testsuite where an object file is dumped with a list of generic section names known to be present in a range of different file formats. */ static void free_only_list (void) { bfd_boolean at_least_one_seen = FALSE; struct only * only; struct only * next; if (only_list == NULL) return; for (only = only_list; only; only = only->next) if (only->seen) { at_least_one_seen = TRUE; break; } for (only = only_list; only; only = next) { if (! at_least_one_seen) { non_fatal (_("section '%s' mentioned in a -j option, " "but not found in any input file"), only->name); exit_status = 1; } next = only->next; free (only); } } static void dump_section_header (bfd *abfd, asection *section, void *ignored ATTRIBUTE_UNUSED) { char *comma = ""; unsigned int opb = bfd_octets_per_byte (abfd); /* Ignore linker created section. See elfNN_ia64_object_p in bfd/elfxx-ia64.c. */ if (section->flags & SEC_LINKER_CREATED) return; /* PR 10413: Skip sections that we are ignoring. */ if (! process_section_p (section)) return; printf ("%3d %-13s %08lx ", section->index, bfd_get_section_name (abfd, section), (unsigned long) bfd_section_size (abfd, section) / opb); bfd_printf_vma (abfd, bfd_get_section_vma (abfd, section)); printf (" "); bfd_printf_vma (abfd, section->lma); printf (" %08lx 2**%u", (unsigned long) 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_LOAD, "LOAD"); PF (SEC_RELOC, "RELOC"); 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"); if (bfd_get_arch (abfd) == bfd_arch_tic54x) { PF (SEC_TIC54X_BLOCK, "BLOCK"); PF (SEC_TIC54X_CLINK, "CLINK"); } PF (SEC_SMALL_DATA, "SMALL_DATA"); if (bfd_get_flavour (abfd) == bfd_target_coff_flavour) PF (SEC_COFF_SHARED, "SHARED"); PF (SEC_THREAD_LOCAL, "THREAD_LOCAL"); PF (SEC_GROUP, "GROUP"); if ((section->flags & SEC_LINK_ONCE) != 0) { const char *ls; struct coff_comdat_info *comdat; 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); comdat = bfd_coff_get_comdat_section (abfd, section); if (comdat != NULL) printf (" (COMDAT %s %ld)", comdat->name, comdat->symbol); comma = ", "; } printf ("\n"); #undef PF } static void dump_headers (bfd *abfd) { printf (_("Sections:\n")); #ifndef BFD64 printf (_("Idx Name Size VMA LMA File off Algn")); #else /* With BFD64, non-ELF returns -1 and wants always 64 bit addresses. */ if (bfd_get_arch_size (abfd) == 32) 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, NULL); } static asymbol ** slurp_symtab (bfd *abfd) { asymbol **sy = NULL; long storage; if (!(bfd_get_file_flags (abfd) & HAS_SYMS)) { 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)); return sy; } /* Read in the dynamic symbols. */ static asymbol ** slurp_dynamic_symtab (bfd *abfd) { asymbol **sy = NULL; long storage; storage = bfd_get_dynamic_symtab_upper_bound (abfd); if (storage < 0) { if (!(bfd_get_file_flags (abfd) & DYNAMIC)) { non_fatal (_("%s: not a dynamic object"), bfd_get_filename (abfd)); exit_status = 1; 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)); 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 (asymbol **symbols, long count) { 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 | BSF_SECTION_SYM)) 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 (const void *ap, const void *bp) { const asymbol *a = * (const asymbol **) ap; const asymbol *b = * (const asymbol **) bp; const char *an; const char *bn; size_t anl; size_t bnl; bfd_boolean af; bfd_boolean bf; flagword aflags; flagword 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 (const void *ap, const void *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 an address (VMA) to the output stream in INFO. If SKIP_ZEROES is TRUE, omit leading zeroes. */ static void objdump_print_value (bfd_vma vma, struct disassemble_info *inf, bfd_boolean skip_zeroes) { char buf[30]; char *p; struct objdump_disasm_info *aux; aux = (struct objdump_disasm_info *) inf->application_data; bfd_sprintf_vma (aux->abfd, buf, vma); if (! skip_zeroes) p = buf; else { for (p = buf; *p == '0'; ++p) ; if (*p == '\0') --p; } (*inf->fprintf_func) (inf->stream, "%s", p); } /* Print the name of a symbol. */ static void objdump_print_symname (bfd *abfd, struct disassemble_info *inf, asymbol *sym) { char *alloc; const char *name; alloc = NULL; name = bfd_asymbol_name (sym); if (do_demangle && name[0] != '\0') { /* Demangle the name. */ alloc = bfd_demangle (abfd, name, DMGL_ANSI | DMGL_PARAMS); if (alloc != NULL) name = alloc; } if (inf != NULL) (*inf->fprintf_func) (inf->stream, "%s", name); else printf ("%s", name); if (alloc != NULL) free (alloc); } /* Locate a symbol given a bfd and a section (from INFO->application_data), and a VMA. If INFO->application_data->require_sec is TRUE, then always require the symbol to be in the section. 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 (bfd_vma vma, struct disassemble_info *inf, 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_count = sorted_symcount; long thisplace; struct objdump_disasm_info *aux; bfd *abfd; asection *sec; unsigned int opb; bfd_boolean want_section; if (sorted_symcount < 1) return NULL; aux = (struct objdump_disasm_info *) inf->application_data; abfd = aux->abfd; sec = aux->sec; opb = inf->octets_per_byte; /* Perform a binary search looking for the closest symbol to the required value. We are searching the range (min, max_count]. */ while (min + 1 < max_count) { asymbol *sym; thisplace = (max_count + min) / 2; sym = sorted_syms[thisplace]; if (bfd_asymbol_value (sym) > vma) max_count = 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; /* Prefer a symbol in the current section if we have multple symbols with the same value, as can occur with overlays or zero size sections. */ min = thisplace; while (min < max_count && (bfd_asymbol_value (sorted_syms[min]) == bfd_asymbol_value (sorted_syms[thisplace]))) { if (sorted_syms[min]->section == sec && inf->symbol_is_valid (sorted_syms[min], inf)) { thisplace = min; if (place != NULL) *place = thisplace; return sorted_syms[thisplace]; } ++min; } /* If the file is relocatable, 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. Also give the target a chance to reject symbols. */ want_section = (aux->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))); if ((sorted_syms[thisplace]->section != sec && want_section) || ! inf->symbol_is_valid (sorted_syms[thisplace], inf)) { long i; long newplace = sorted_symcount; for (i = min - 1; i >= 0; i--) { if ((sorted_syms[i]->section == sec || !want_section) && inf->symbol_is_valid (sorted_syms[i], inf)) { if (newplace == sorted_symcount) newplace = i; if (bfd_asymbol_value (sorted_syms[i]) != bfd_asymbol_value (sorted_syms[newplace])) break; /* Remember this symbol and keep searching until we reach an earlier address. */ newplace = i; } } if (newplace != sorted_symcount) thisplace = newplace; else { /* 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 || !want_section) && inf->symbol_is_valid (sorted_syms[i], inf)) { thisplace = i; break; } } } if ((sorted_syms[thisplace]->section != sec && want_section) || ! inf->symbol_is_valid (sorted_syms[thisplace], inf)) /* There is no suitable symbol. */ return NULL; } if (place != NULL) *place = thisplace; return sorted_syms[thisplace]; } /* Print an address and the offset to the nearest symbol. */ static void objdump_print_addr_with_sym (bfd *abfd, asection *sec, asymbol *sym, bfd_vma vma, struct disassemble_info *inf, bfd_boolean skip_zeroes) { objdump_print_value (vma, inf, skip_zeroes); if (sym == NULL) { bfd_vma secaddr; (*inf->fprintf_func) (inf->stream, " <%s", bfd_get_section_name (abfd, sec)); secaddr = bfd_get_section_vma (abfd, sec); if (vma < secaddr) { (*inf->fprintf_func) (inf->stream, "-0x"); objdump_print_value (secaddr - vma, inf, TRUE); } else if (vma > secaddr) { (*inf->fprintf_func) (inf->stream, "+0x"); objdump_print_value (vma - secaddr, inf, TRUE); } (*inf->fprintf_func) (inf->stream, ">"); } else { (*inf->fprintf_func) (inf->stream, " <"); objdump_print_symname (abfd, inf, sym); if (bfd_asymbol_value (sym) > vma) { (*inf->fprintf_func) (inf->stream, "-0x"); objdump_print_value (bfd_asymbol_value (sym) - vma, inf, TRUE); } else if (vma > bfd_asymbol_value (sym)) { (*inf->fprintf_func) (inf->stream, "+0x"); objdump_print_value (vma - bfd_asymbol_value (sym), inf, TRUE); } (*inf->fprintf_func) (inf->stream, ">"); } if (display_file_offsets) inf->fprintf_func (inf->stream, _(" (File Offset: 0x%lx)"), (long int)(sec->filepos + (vma - sec->vma))); } /* Print an address (VMA), symbolically if possible. If SKIP_ZEROES is TRUE, don't output leading zeroes. */ static void objdump_print_addr (bfd_vma vma, struct disassemble_info *inf, bfd_boolean skip_zeroes) { struct objdump_disasm_info *aux; asymbol *sym = NULL; bfd_boolean skip_find = FALSE; aux = (struct objdump_disasm_info *) inf->application_data; if (sorted_symcount < 1) { (*inf->fprintf_func) (inf->stream, "0x"); objdump_print_value (vma, inf, skip_zeroes); if (display_file_offsets) inf->fprintf_func (inf->stream, _(" (File Offset: 0x%lx)"), (long int)(aux->sec->filepos + (vma - aux->sec->vma))); return; } if (aux->reloc != NULL && aux->reloc->sym_ptr_ptr != NULL && * aux->reloc->sym_ptr_ptr != NULL) { sym = * aux->reloc->sym_ptr_ptr; /* Adjust the vma to the reloc. */ vma += bfd_asymbol_value (sym); if (bfd_is_und_section (bfd_get_section (sym))) skip_find = TRUE; } if (!skip_find) sym = find_symbol_for_address (vma, inf, NULL); objdump_print_addr_with_sym (aux->abfd, aux->sec, sym, vma, inf, skip_zeroes); } /* Print VMA to INFO. This function is passed to the disassembler routine. */ static void objdump_print_address (bfd_vma vma, struct disassemble_info *inf) { objdump_print_addr (vma, inf, ! prefix_addresses); } /* Determine if the given address has a symbol associated with it. */ static int objdump_symbol_at_address (bfd_vma vma, struct disassemble_info * inf) { asymbol * sym; sym = find_symbol_for_address (vma, inf, 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 disassembly 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; const char *filename; const char *modname; const char *map; size_t mapsize; const char **linemap; unsigned maxline; unsigned last_line; int first; }; 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) /* Read a complete file into memory. */ static const char * slurp_file (const char *fn, size_t *size) { #ifdef HAVE_MMAP int ps = getpagesize (); size_t msize; #endif const char *map; struct stat st; int fd = open (fn, O_RDONLY | O_BINARY); if (fd < 0) return NULL; if (fstat (fd, &st) < 0) return NULL; *size = st.st_size; #ifdef HAVE_MMAP msize = (*size + ps - 1) & ~(ps - 1); map = mmap (NULL, msize, PROT_READ, MAP_SHARED, fd, 0); if (map != (char *)-1L) { close(fd); return map; } #endif map = (const char *) malloc (*size); if (!map || (size_t) read (fd, (char *)map, *size) != *size) { free ((void *)map); map = NULL; } close (fd); return map; } #define line_map_decrease 5 /* Precompute array of lines for a mapped file. */ static const char ** index_file (const char *map, size_t size, unsigned int *maxline) { const char *p, *lstart, *end; int chars_per_line = 45; /* First iteration will use 40. */ unsigned int lineno; const char **linemap = NULL; unsigned long line_map_size = 0; lineno = 0; lstart = map; end = map + size; for (p = map; p < end; p++) { if (*p == '\n') { if (p + 1 < end && p[1] == '\r') p++; } else if (*p == '\r') { if (p + 1 < end && p[1] == '\n') p++; } else continue; /* End of line found. */ if (linemap == NULL || line_map_size < lineno + 1) { unsigned long newsize; chars_per_line -= line_map_decrease; if (chars_per_line <= 1) chars_per_line = 1; line_map_size = size / chars_per_line + 1; if (line_map_size < lineno + 1) line_map_size = lineno + 1; newsize = line_map_size * sizeof (char *); linemap = (const char **) xrealloc (linemap, newsize); } linemap[lineno++] = lstart; lstart = p + 1; } *maxline = lineno; return linemap; } /* Tries to open MODNAME, and if successful adds a node to print_files linked list and returns that node. Returns NULL on failure. */ static struct print_file_list * try_print_file_open (const char *origname, const char *modname) { struct print_file_list *p; p = (struct print_file_list *) xmalloc (sizeof (struct print_file_list)); p->map = slurp_file (modname, &p->mapsize); if (p->map == NULL) { free (p); return NULL; } p->linemap = index_file (p->map, p->mapsize, &p->maxline); p->last_line = 0; p->filename = origname; p->modname = modname; p->next = print_files; p->first = 1; print_files = p; return p; } /* If the the source file, as described in the symtab, is not found try to locate it in one of the paths specified with -I If found, add location to print_files linked list. */ static struct print_file_list * update_source_path (const char *filename) { struct print_file_list *p; const char *fname; int i; p = try_print_file_open (filename, filename); if (p != NULL) return p; if (include_path_count == 0) return NULL; /* Get the name of the file. */ fname = lbasename (filename); /* If file exists under a new path, we need to add it to the list so that show_line knows about it. */ for (i = 0; i < include_path_count; i++) { char *modname = concat (include_paths[i], "/", fname, (const char *) 0); p = try_print_file_open (filename, modname); if (p) return p; free (modname); } return NULL; } /* Print a source file line. */ static void print_line (struct print_file_list *p, unsigned int linenum) { const char *l; size_t len; --linenum; if (linenum >= p->maxline) return; l = p->linemap [linenum]; /* Test fwrite return value to quiet glibc warning. */ len = strcspn (l, "\n\r"); if (len == 0 || fwrite (l, len, 1, stdout) == 1) putchar ('\n'); } /* Print a range of source code lines. */ static void dump_lines (struct print_file_list *p, unsigned int start, unsigned int end) { if (p->map == NULL) return; while (start <= end) { print_line (p, start); start++; } } /* Show the line number, or the source line, in a disassembly listing. */ static void show_line (bfd *abfd, asection *section, bfd_vma addr_offset) { const char *filename; const char *functionname; unsigned int linenumber; bfd_boolean reloc; if (! with_line_numbers && ! with_source_code) return; if (! bfd_find_nearest_line (abfd, section, syms, addr_offset, &filename, &functionname, &linenumber)) return; if (filename != NULL && *filename == '\0') filename = NULL; if (functionname != NULL && *functionname == '\0') functionname = NULL; if (filename && IS_ABSOLUTE_PATH (filename) && prefix) { char *path_up; const char *fname = filename; char *path = (char *) alloca (prefix_length + PATH_MAX + 1); if (prefix_length) memcpy (path, prefix, prefix_length); path_up = path + prefix_length; /* Build relocated filename, stripping off leading directories from the initial filename if requested. */ if (prefix_strip > 0) { int level = 0; const char *s; /* Skip selected directory levels. */ for (s = fname + 1; *s != '\0' && level < prefix_strip; s++) if (IS_DIR_SEPARATOR(*s)) { fname = s; level++; } } /* Update complete filename. */ strncpy (path_up, fname, PATH_MAX); path_up[PATH_MAX] = '\0'; filename = path; reloc = TRUE; } else reloc = FALSE; if (with_line_numbers) { if (functionname != NULL && (prev_functionname == NULL || strcmp (functionname, prev_functionname) != 0)) printf ("%s():\n", functionname); if (linenumber > 0 && linenumber != prev_line) printf ("%s:%u\n", filename == NULL ? "???" : filename, linenumber); } if (with_source_code && filename != NULL && linenumber > 0) { struct print_file_list **pp, *p; unsigned l; for (pp = &print_files; *pp != NULL; pp = &(*pp)->next) if (filename_cmp ((*pp)->filename, filename) == 0) break; p = *pp; if (p == NULL) { if (reloc) filename = xstrdup (filename); p = update_source_path (filename); } if (p != NULL && linenumber != p->last_line) { if (file_start_context && p->first) l = 1; else { l = linenumber - SHOW_PRECEDING_CONTEXT_LINES; if (l >= linenumber) l = 1; if (p->last_line >= l && p->last_line <= linenumber) l = p->last_line + 1; } dump_lines (p, l, linenumber); p->last_line = linenumber; p->first = 0; } } if (functionname != NULL && (prev_functionname == NULL || strcmp (functionname, prev_functionname) != 0)) { if (prev_functionname != NULL) free (prev_functionname); prev_functionname = (char *) xmalloc (strlen (functionname) + 1); strcpy (prev_functionname, functionname); } if (linenumber > 0 && linenumber != prev_line) prev_line = linenumber; } /* Pseudo FILE object for strings. */ typedef struct { char *buffer; size_t pos; size_t alloc; } SFILE; /* sprintf to a "stream". */ static int ATTRIBUTE_PRINTF_2 objdump_sprintf (SFILE *f, const char *format, ...) { size_t n; va_list args; while (1) { size_t space = f->alloc - f->pos; va_start (args, format); n = vsnprintf (f->buffer + f->pos, space, format, args); va_end (args); if (space > n) break; f->alloc = (f->alloc + n) * 2; f->buffer = (char *) xrealloc (f->buffer, f->alloc); } f->pos += n; return n; } /* The number of zeroes we want to see before we start skipping them. The number is arbitrarily chosen. */ #define DEFAULT_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 DEFAULT_SKIP_ZEROES_AT_END 3 /* Disassemble some data in memory between given values. */ static void disassemble_bytes (struct disassemble_info * inf, disassembler_ftype disassemble_fn, bfd_boolean insns, bfd_byte * data, bfd_vma start_offset, bfd_vma stop_offset, bfd_vma rel_offset, arelent *** relppp, arelent ** relppend) { struct objdump_disasm_info *aux; asection *section; int octets_per_line; int skip_addr_chars; bfd_vma addr_offset; unsigned int opb = inf->octets_per_byte; unsigned int skip_zeroes = inf->skip_zeroes; unsigned int skip_zeroes_at_end = inf->skip_zeroes_at_end; int octets = opb; SFILE sfile; aux = (struct objdump_disasm_info *) inf->application_data; section = aux->sec; sfile.alloc = 120; sfile.buffer = (char *) xmalloc (sfile.alloc); sfile.pos = 0; if (insn_width) octets_per_line = insn_width; else 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]; bfd_sprintf_vma (aux->abfd, buf, section->vma + section->size / opb); while (buf[skip_addr_chars] == '0') ++skip_addr_chars; /* Don't discard zeros on overflow. */ if (buf[skip_addr_chars] == '\0' && section->vma != 0) skip_addr_chars = 0; if (skip_addr_chars != 0) skip_addr_chars = (skip_addr_chars - 1) & -4; } inf->insn_info_valid = 0; addr_offset = start_offset; while (addr_offset < stop_offset) { bfd_vma z; bfd_boolean need_nl = FALSE; int previous_octets; /* Remember the length of the previous instruction. */ previous_octets = octets; octets = 0; /* Make sure we don't use relocs from previous instructions. */ aux->reloc = NULL; /* 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 && (inf->insn_info_valid == 0 || inf->branch_delay_insns == 0) && (z - addr_offset * opb >= skip_zeroes || (z == stop_offset * opb && z - addr_offset * opb < skip_zeroes_at_end))) { /* 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; /* If we are going to display more data, and we are displaying file offsets, then tell the user how many zeroes we skip and the file offset from where we resume dumping. */ if (display_file_offsets && ((addr_offset + (octets / opb)) < stop_offset)) printf ("\t... (skipping %d zeroes, resuming at file offset: 0x%lx)\n", octets / opb, (unsigned long) (section->filepos + (addr_offset + (octets / opb)))); else printf ("\t...\n"); } else { char buf[50]; int bpc = 0; int pb = 0; if (with_line_numbers || with_source_code) show_line (aux->abfd, section, addr_offset); if (! prefix_addresses) { char *s; bfd_sprintf_vma (aux->abfd, 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, inf); aux->require_sec = FALSE; putchar (' '); } if (insns) { sfile.pos = 0; inf->fprintf_func = (fprintf_ftype) objdump_sprintf; inf->stream = &sfile; inf->bytes_per_line = 0; inf->bytes_per_chunk = 0; inf->flags = disassemble_all ? DISASSEMBLE_DATA : 0; if (machine) inf->flags |= USER_SPECIFIED_MACHINE_TYPE; if (inf->disassembler_needs_relocs && (bfd_get_file_flags (aux->abfd) & EXEC_P) == 0 && (bfd_get_file_flags (aux->abfd) & DYNAMIC) == 0 && *relppp < relppend) { bfd_signed_vma distance_to_rel; distance_to_rel = (**relppp)->address - (rel_offset + addr_offset); /* Check to see if the current reloc is associated with the instruction that we are about to disassemble. */ if (distance_to_rel == 0 /* FIXME: This is wrong. We are trying to catch relocs that are addressed part way through the current instruction, as might happen with a packed VLIW instruction. Unfortunately we do not know the length of the current instruction since we have not disassembled it yet. Instead we take a guess based upon the length of the previous instruction. The proper solution is to have a new target-specific disassembler function which just returns the length of an instruction at a given address without trying to display its disassembly. */ || (distance_to_rel > 0 && distance_to_rel < (bfd_signed_vma) (previous_octets/ opb))) { inf->flags |= INSN_HAS_RELOC; aux->reloc = **relppp; } } octets = (*disassemble_fn) (section->vma + addr_offset, inf); inf->fprintf_func = (fprintf_ftype) fprintf; inf->stream = stdout; if (insn_width == 0 && inf->bytes_per_line != 0) octets_per_line = inf->bytes_per_line; if (octets < (int) opb) { if (sfile.pos) printf ("%s\n", sfile.buffer); if (octets >= 0) { non_fatal (_("disassemble_fn returned length %d"), octets); exit_status = 1; } 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 (inf->bytes_per_chunk) bpc = inf->bytes_per_chunk; else bpc = 1; for (j = addr_offset * opb; j < addr_offset * opb + pb; j += bpc) { int k; if (bpc > 1 && inf->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 if (sfile.pos) printf ("%s", 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; bfd_sprintf_vma (aux->abfd, 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 && inf->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; } while ((*relppp) < relppend && (**relppp)->address < rel_offset + addr_offset + octets / opb) { if (dump_reloc_info || dump_dynamic_reloc_info) { arelent *q; q = **relppp; if (wide_output) putchar ('\t'); else printf ("\t\t\t"); objdump_print_value (section->vma - rel_offset + q->address, inf, TRUE); if (q->howto == NULL) printf (": *unknown*\t"); else if (q->howto->name) printf (": %s\t", q->howto->name); else printf (": %d\t", q->howto->type); 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, inf, *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, inf, TRUE); } printf ("\n"); need_nl = FALSE; } ++(*relppp); } if (need_nl) printf ("\n"); addr_offset += octets / opb; } free (sfile.buffer); } static void disassemble_section (bfd *abfd, asection *section, void *inf) { const struct elf_backend_data * bed; bfd_vma sign_adjust = 0; struct disassemble_info * pinfo = (struct disassemble_info *) inf; struct objdump_disasm_info * paux; unsigned int opb = pinfo->octets_per_byte; bfd_byte * data = NULL; bfd_size_type datasize = 0; arelent ** rel_pp = NULL; arelent ** rel_ppstart = NULL; arelent ** rel_ppend; unsigned long stop_offset; asymbol * sym = NULL; long place = 0; long rel_count; bfd_vma rel_offset; unsigned long addr_offset; /* Sections that do not contain machine code are not normally disassembled. */ if (! disassemble_all && only_list == NULL && ((section->flags & (SEC_CODE | SEC_HAS_CONTENTS)) != (SEC_CODE | SEC_HAS_CONTENTS))) return; if (! process_section_p (section)) return; datasize = bfd_get_section_size (section); if (datasize == 0) return; /* Decide which set of relocs to use. Load them if necessary. */ paux = (struct objdump_disasm_info *) pinfo->application_data; if (paux->dynrelbuf) { rel_pp = paux->dynrelbuf; rel_count = paux->dynrelcount; /* Dynamic reloc addresses are absolute, non-dynamic are section relative. REL_OFFSET specifies the reloc address corresponding to the start of this section. */ rel_offset = section->vma; } else { rel_count = 0; rel_pp = NULL; rel_offset = 0; if ((section->flags & SEC_RELOC) != 0 && (dump_reloc_info || pinfo->disassembler_needs_relocs)) { long relsize; relsize = bfd_get_reloc_upper_bound (abfd, section); if (relsize < 0) bfd_fatal (bfd_get_filename (abfd)); if (relsize > 0) { rel_ppstart = rel_pp = (arelent **) xmalloc (relsize); rel_count = bfd_canonicalize_reloc (abfd, section, rel_pp, syms); if (rel_count < 0) bfd_fatal (bfd_get_filename (abfd)); /* Sort the relocs by address. */ qsort (rel_pp, rel_count, sizeof (arelent *), compare_relocs); } } } rel_ppend = rel_pp + rel_count; data = (bfd_byte *) xmalloc (datasize); bfd_get_section_contents (abfd, section, data, 0, datasize); paux->sec = section; pinfo->buffer = data; pinfo->buffer_vma = section->vma; pinfo->buffer_length = datasize; pinfo->section = section; if (start_address == (bfd_vma) -1 || start_address < pinfo->buffer_vma) addr_offset = 0; else addr_offset = start_address - pinfo->buffer_vma; if (stop_address == (bfd_vma) -1) stop_offset = datasize / opb; else { if (stop_address < pinfo->buffer_vma) stop_offset = 0; else stop_offset = stop_address - pinfo->buffer_vma; if (stop_offset > pinfo->buffer_length / opb) stop_offset = pinfo->buffer_length / opb; } /* Skip over the relocs belonging to addresses below the start address. */ while (rel_pp < rel_ppend && (*rel_pp)->address < rel_offset + addr_offset) ++rel_pp; if (addr_offset < stop_offset) printf (_("\nDisassembly of section %s:\n"), section->name); /* Find the nearest symbol forwards from our current position. */ paux->require_sec = TRUE; sym = (asymbol *) find_symbol_for_address (section->vma + addr_offset, (struct disassemble_info *) inf, &place); paux->require_sec = FALSE; /* PR 9774: If the target used signed addresses then we must make sure that we sign extend the value that we calculate for 'addr' in the loop below. */ if (bfd_get_flavour (abfd) == bfd_target_elf_flavour && (bed = get_elf_backend_data (abfd)) != NULL && bed->sign_extend_vma) sign_adjust = (bfd_vma) 1 << (bed->s->arch_size - 1); /* Disassemble a block of instructions up to the address associated with the symbol we have just found. Then print the symbol and find the next symbol on. Repeat until we have disassembled the entire section or we have reached the end of the address range we are interested in. */ while (addr_offset < stop_offset) { bfd_vma addr; asymbol *nextsym; unsigned long nextstop_offset; bfd_boolean insns; addr = section->vma + addr_offset; addr = ((addr & ((sign_adjust << 1) - 1)) ^ sign_adjust) - sign_adjust; if (sym != NULL && bfd_asymbol_value (sym) <= addr) { int x; for (x = place; (x < sorted_symcount && (bfd_asymbol_value (sorted_syms[x]) <= addr)); ++x) continue; pinfo->symbols = sorted_syms + place; pinfo->num_symbols = x - place; pinfo->symtab_pos = place; } else { pinfo->symbols = NULL; pinfo->num_symbols = 0; pinfo->symtab_pos = -1; } if (! prefix_addresses) { pinfo->fprintf_func (pinfo->stream, "\n"); objdump_print_addr_with_sym (abfd, section, sym, addr, pinfo, FALSE); pinfo->fprintf_func (pinfo->stream, ":\n"); } if (sym != NULL && bfd_asymbol_value (sym) > addr) nextsym = sym; else if (sym == NULL) nextsym = NULL; else { #define is_valid_next_sym(SYM) \ ((SYM)->section == section \ && (bfd_asymbol_value (SYM) > bfd_asymbol_value (sym)) \ && pinfo->symbol_is_valid (SYM, pinfo)) /* 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 && ! is_valid_next_sym (sorted_syms [place])) ++place; if (place >= sorted_symcount) nextsym = NULL; else nextsym = sorted_syms[place]; } if (sym != NULL && bfd_asymbol_value (sym) > addr) nextstop_offset = bfd_asymbol_value (sym) - section->vma; else if (nextsym == NULL) nextstop_offset = stop_offset; else nextstop_offset = bfd_asymbol_value (nextsym) - section->vma; if (nextstop_offset > stop_offset || nextstop_offset <= addr_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 || sym->section != section || bfd_asymbol_value (sym) > addr || ((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 (pinfo, paux->disassemble_fn, insns, data, addr_offset, nextstop_offset, rel_offset, &rel_pp, rel_ppend); addr_offset = nextstop_offset; sym = nextsym; } free (data); if (rel_ppstart != NULL) free (rel_ppstart); } /* Disassemble the contents of an object file. */ static void disassemble_data (bfd *abfd) { struct disassemble_info disasm_info; struct objdump_disasm_info aux; long i; 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_symcount = symcount ? symcount : dynsymcount; sorted_syms = (asymbol **) xmalloc ((sorted_symcount + synthcount) * sizeof (asymbol *)); memcpy (sorted_syms, symcount ? syms : dynsyms, sorted_symcount * sizeof (asymbol *)); sorted_symcount = remove_useless_symbols (sorted_syms, sorted_symcount); for (i = 0; i < synthcount; ++i) { sorted_syms[sorted_symcount] = synthsyms + i; ++sorted_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_ftype) fprintf); disasm_info.application_data = (void *) &aux; aux.abfd = abfd; aux.require_sec = FALSE; aux.dynrelbuf = NULL; aux.dynrelcount = 0; aux.reloc = NULL; disasm_info.print_address_func = objdump_print_address; disasm_info.symbol_at_address_func = objdump_symbol_at_address; if (machine != NULL) { const bfd_arch_info_type *inf = bfd_scan_arch (machine); if (inf == NULL) fatal (_("can't use supplied machine %s"), machine); abfd->arch_info = inf; } 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; } /* Use libopcodes to locate a suitable disassembler. */ aux.disassemble_fn = disassembler (abfd); if (!aux.disassemble_fn) { non_fatal (_("can't disassemble for architecture %s\n"), 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; disasm_info.octets_per_byte = bfd_octets_per_byte (abfd); disasm_info.skip_zeroes = DEFAULT_SKIP_ZEROES; disasm_info.skip_zeroes_at_end = DEFAULT_SKIP_ZEROES_AT_END; disasm_info.disassembler_needs_relocs = FALSE; 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; /* Allow the target to customize the info structure. */ disassemble_init_for_target (& disasm_info); /* Pre-load the dynamic relocs if we are going to be dumping them along with the disassembly. */ if (dump_dynamic_reloc_info) { long relsize = bfd_get_dynamic_reloc_upper_bound (abfd); if (relsize < 0) bfd_fatal (bfd_get_filename (abfd)); if (relsize > 0) { aux.dynrelbuf = (arelent **) xmalloc (relsize); aux.dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, aux.dynrelbuf, dynsyms); if (aux.dynrelcount < 0) bfd_fatal (bfd_get_filename (abfd)); /* Sort the relocs by address. */ qsort (aux.dynrelbuf, aux.dynrelcount, sizeof (arelent *), compare_relocs); } } disasm_info.symtab = sorted_syms; disasm_info.symtab_size = sorted_symcount; bfd_map_over_sections (abfd, disassemble_section, & disasm_info); if (aux.dynrelbuf != NULL) free (aux.dynrelbuf); free (sorted_syms); } static int load_specific_debug_section (enum dwarf_section_display_enum debug, asection *sec, void *file) { struct dwarf_section *section = &debug_displays [debug].section; bfd *abfd = (bfd *) file; bfd_boolean ret; /* If it is already loaded, do nothing. */ if (section->start != NULL) return 1; section->address = 0; section->size = bfd_get_section_size (sec); section->start = NULL; ret = bfd_get_full_section_contents (abfd, sec, §ion->start); if (! ret) { free_debug_section (debug); printf (_("\nCan't get contents for section '%s'.\n"), section->name); return 0; } if (is_relocatable && debug_displays [debug].relocate) { /* We want to relocate the data we've already read (and decompressed), so we store a pointer to the data in the bfd_section, and tell it that the contents are already in memory. */ sec->contents = section->start; sec->flags |= SEC_IN_MEMORY; sec->size = section->size; ret = bfd_simple_get_relocated_section_contents (abfd, sec, section->start, syms) != NULL; if (! ret) { free_debug_section (debug); printf (_("\nCan't get contents for section '%s'.\n"), section->name); return 0; } } return 1; } int load_debug_section (enum dwarf_section_display_enum debug, void *file) { struct dwarf_section *section = &debug_displays [debug].section; bfd *abfd = (bfd *) file; asection *sec; /* If it is already loaded, do nothing. */ if (section->start != NULL) return 1; /* Locate the debug section. */ sec = bfd_get_section_by_name (abfd, section->uncompressed_name); if (sec != NULL) section->name = section->uncompressed_name; else { sec = bfd_get_section_by_name (abfd, section->compressed_name); if (sec != NULL) section->name = section->compressed_name; } if (sec == NULL) return 0; return load_specific_debug_section (debug, sec, file); } void free_debug_section (enum dwarf_section_display_enum debug) { struct dwarf_section *section = &debug_displays [debug].section; if (section->start == NULL) return; free ((char *) section->start); section->start = NULL; section->address = 0; section->size = 0; } static void dump_dwarf_section (bfd *abfd, asection *section, void *arg ATTRIBUTE_UNUSED) { const char *name = bfd_get_section_name (abfd, section); const char *match; int i; if (CONST_STRNEQ (name, ".gnu.linkonce.wi.")) match = ".debug_info"; else match = name; for (i = 0; i < max; i++) if ((strcmp (debug_displays [i].section.uncompressed_name, match) == 0 || strcmp (debug_displays [i].section.compressed_name, match) == 0) && debug_displays [i].enabled != NULL && *debug_displays [i].enabled) { struct dwarf_section *sec = &debug_displays [i].section; if (strcmp (sec->uncompressed_name, match) == 0) sec->name = sec->uncompressed_name; else sec->name = sec->compressed_name; if (load_specific_debug_section ((enum dwarf_section_display_enum) i, section, abfd)) { debug_displays [i].display (sec, abfd); if (i != info && i != abbrev) free_debug_section ((enum dwarf_section_display_enum) i); } break; } } /* Dump the dwarf debugging information. */ static void dump_dwarf (bfd *abfd) { is_relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0; eh_addr_size = bfd_arch_bits_per_address (abfd) / 8; if (bfd_big_endian (abfd)) byte_get = byte_get_big_endian; else if (bfd_little_endian (abfd)) byte_get = byte_get_little_endian; else abort (); switch (bfd_get_arch (abfd)) { case bfd_arch_i386: switch (bfd_get_mach (abfd)) { case bfd_mach_x86_64: case bfd_mach_x86_64_intel_syntax: init_dwarf_regnames_x86_64 (); break; default: init_dwarf_regnames_i386 (); break; } break; default: break; } bfd_map_over_sections (abfd, dump_dwarf_section, NULL); free_debug_memory (); } /* Read ABFD's stabs section STABSECT_NAME, and return a pointer to it. Return NULL on failure. */ static char * read_section_stabs (bfd *abfd, const char *sect_name, bfd_size_type *size_ptr) { asection *stabsect; bfd_size_type size; char *contents; stabsect = bfd_get_section_by_name (abfd, sect_name); if (stabsect == NULL) { printf (_("No %s section present\n\n"), sect_name); return FALSE; } size = bfd_section_size (abfd, stabsect); contents = (char *) xmalloc (size); if (! bfd_get_section_contents (abfd, stabsect, contents, 0, size)) { non_fatal (_("reading %s section of %s failed: %s"), sect_name, bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); exit_status = 1; free (contents); return NULL; } *size_ptr = size; return contents; } /* 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 (bfd *abfd, const char *stabsect_name, unsigned *string_offset_ptr) { int i; unsigned file_string_table_offset = 0; unsigned next_file_string_table_offset = *string_offset_ptr; 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); bfd_printf_vma (abfd, 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"); *string_offset_ptr = next_file_string_table_offset; } typedef struct { const char * section_name; const char * string_section_name; unsigned string_offset; } stab_section_names; static void find_stabs_section (bfd *abfd, asection *section, void *names) { int len; stab_section_names * sought = (stab_section_names *) names; /* Check for section names for which stabsect_name is a prefix, to handle .stab.N, etc. */ len = strlen (sought->section_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 (sought->section_name, section->name, len) == 0 && (section->name[len] == 0 || (section->name[len] == '.' && ISDIGIT (section->name[len + 1])))) { if (strtab == NULL) strtab = read_section_stabs (abfd, sought->string_section_name, &stabstr_size); if (strtab) { stabs = (bfd_byte *) read_section_stabs (abfd, section->name, &stab_size); if (stabs) print_section_stabs (abfd, section->name, &sought->string_offset); } } } static void dump_stabs_section (bfd *abfd, char *stabsect_name, char *strsect_name) { stab_section_names s; s.section_name = stabsect_name; s.string_section_name = strsect_name; s.string_offset = 0; bfd_map_over_sections (abfd, find_stabs_section, & s); free (strtab); strtab = NULL; } /* Dump the any sections containing stabs debugging information. */ static void dump_stabs (bfd *abfd) { dump_stabs_section (abfd, ".stab", ".stabstr"); dump_stabs_section (abfd, ".stab.excl", ".stab.exclstr"); dump_stabs_section (abfd, ".stab.index", ".stab.indexstr"); /* For Darwin. */ dump_stabs_section (abfd, "LC_SYMTAB.stabs", "LC_SYMTAB.stabstr"); dump_stabs_section (abfd, "$GDB_SYMBOLS$", "$GDB_STRINGS$"); } static void dump_bfd_header (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 & ~BFD_FLAGS_FOR_BFD_USE_MASK); #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"); PF (HAS_LOAD_PAGE, "HAS_LOAD_PAGE"); printf (_("\nstart address 0x")); bfd_printf_vma (abfd, abfd->start_address); printf ("\n"); } static void dump_bfd_private_header (bfd *abfd) { bfd_print_private_bfd_data (abfd, stdout); } static void dump_target_specific (bfd *abfd) { const struct objdump_private_desc * const *desc; struct objdump_private_option *opt; char *e, *b; /* Find the desc. */ for (desc = objdump_private_vectors; *desc != NULL; desc++) if ((*desc)->filter (abfd)) break; if (desc == NULL) { non_fatal (_("option -P/--private not supported by this file")); return; } /* Clear all options. */ for (opt = (*desc)->options; opt->name; opt++) opt->selected = FALSE; /* Decode options. */ b = dump_private_options; do { e = strchr (b, ','); if (e) *e = 0; for (opt = (*desc)->options; opt->name; opt++) if (strcmp (opt->name, b) == 0) { opt->selected = TRUE; break; } if (opt->name == NULL) non_fatal (_("target specific dump '%s' not supported"), b); if (e) { *e = ','; b = e + 1; } } while (e != NULL); /* Dump. */ (*desc)->dump (abfd); } /* Display a section in hexadecimal format with associated characters. Each line prefixed by the zero padded address. */ static void dump_section (bfd *abfd, asection *section, void *dummy ATTRIBUTE_UNUSED) { bfd_byte *data = 0; bfd_size_type datasize; bfd_size_type addr_offset; bfd_size_type start_offset; bfd_size_type stop_offset; unsigned int opb = bfd_octets_per_byte (abfd); /* Bytes per line. */ const int onaline = 16; char buf[64]; int count; int width; if ((section->flags & SEC_HAS_CONTENTS) == 0) return; if (! process_section_p (section)) return; if ((datasize = bfd_section_size (abfd, section)) == 0) return; /* Compute the address range to display. */ 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 = datasize / opb; else { if (stop_address < section->vma) stop_offset = 0; else stop_offset = stop_address - section->vma; if (stop_offset > datasize / opb) stop_offset = datasize / opb; } if (start_offset >= stop_offset) return; printf (_("Contents of section %s:"), section->name); if (display_file_offsets) printf (_(" (Starting at file offset: 0x%lx)"), (unsigned long) (section->filepos + start_offset)); printf ("\n"); if (!bfd_get_full_section_contents (abfd, section, &data)) { non_fatal (_("Reading section failed")); return; } width = 4; bfd_sprintf_vma (abfd, buf, start_offset + section->vma); if (strlen (buf) >= sizeof (buf)) abort (); count = 0; while (buf[count] == '0' && buf[count+1] != '\0') count++; count = strlen (buf) - count; if (count > width) width = count; bfd_sprintf_vma (abfd, buf, stop_offset + section->vma - 1); if (strlen (buf) >= sizeof (buf)) abort (); count = 0; while (buf[count] == '0' && buf[count+1] != '\0') count++; count = strlen (buf) - count; if (count > width) width = count; for (addr_offset = start_offset; addr_offset < stop_offset; addr_offset += onaline / opb) { bfd_size_type j; bfd_sprintf_vma (abfd, buf, (addr_offset + section->vma)); count = strlen (buf); if ((size_t) count >= sizeof (buf)) abort (); putchar (' '); while (count < width) { putchar ('0'); count++; } fputs (buf + count - width, stdout); putchar (' '); 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 * opb; j < addr_offset * opb + onaline; j++) { if (j >= stop_offset * opb) printf (" "); else printf ("%c", ISPRINT (data[j]) ? data[j] : '.'); } putchar ('\n'); } free (data); } /* Actually display the various requested regions. */ static void dump_data (bfd *abfd) { bfd_map_over_sections (abfd, dump_section, NULL); } /* Should perhaps share code and display with nm? */ static void dump_symbols (bfd *abfd ATTRIBUTE_UNUSED, bfd_boolean dynamic) { asymbol **current; long max_count; long count; if (dynamic) { current = dynsyms; max_count = dynsymcount; printf ("DYNAMIC SYMBOL TABLE:\n"); } else { current = syms; max_count = symcount; printf ("SYMBOL TABLE:\n"); } if (max_count == 0) printf (_("no symbols\n")); for (count = 0; count < max_count; count++) { bfd *cur_bfd; if (*current == NULL) printf (_("no information for symbol number %ld\n"), count); else if ((cur_bfd = bfd_asymbol_bfd (*current)) == NULL) printf (_("could not determine the type of symbol number %ld\n"), count); else if (process_section_p ((* current)->section) && (dump_special_syms || !bfd_is_target_special_symbol (cur_bfd, *current))) { const char *name = (*current)->name; if (do_demangle && name != NULL && *name != '\0') { char *alloc; /* 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. */ alloc = bfd_demangle (cur_bfd, name, DMGL_ANSI | DMGL_PARAMS); if (alloc != NULL) (*current)->name = alloc; bfd_print_symbol (cur_bfd, stdout, *current, bfd_print_symbol_all); if (alloc != NULL) { (*current)->name = name; free (alloc); } } else bfd_print_symbol (cur_bfd, stdout, *current, bfd_print_symbol_all); printf ("\n"); } current++; } printf ("\n\n"); } static void dump_reloc_set (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]; bfd_sprintf_vma (abfd, 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 != NULL; p++, relcount--) { arelent *q = *p; const char *filename, *functionname; unsigned int linenumber; const char *sym_name; const char *section_name; bfd_vma addend2 = 0; 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, &linenumber)) { 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 (linenumber > 0 && (linenumber != last_line || (filename != NULL && last_filename != NULL && filename_cmp (filename, last_filename) != 0))) { printf ("%s:%u\n", filename == NULL ? "???" : filename, linenumber); last_line = linenumber; 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; } bfd_printf_vma (abfd, q->address); if (q->howto == NULL) printf (" *unknown* "); else if (q->howto->name) { const char *name = q->howto->name; /* R_SPARC_OLO10 relocations contain two addends. But because 'arelent' lacks enough storage to store them both, the 64-bit ELF Sparc backend records this as two relocations. One R_SPARC_LO10 and one R_SPARC_13, both pointing to the same address. This is merely so that we have some place to store both addend fields. Undo this transformation, otherwise the output will be confusing. */ if (abfd->xvec->flavour == bfd_target_elf_flavour && elf_tdata(abfd)->elf_header->e_machine == EM_SPARCV9 && relcount > 1 && !strcmp (q->howto->name, "R_SPARC_LO10")) { arelent *q2 = *(p + 1); if (q2 != NULL && q2->howto && q->address == q2->address && !strcmp (q2->howto->name, "R_SPARC_13")) { name = "R_SPARC_OLO10"; addend2 = q2->addend; p++; } } printf (" %-16s ", name); } else printf (" %-16d ", q->howto->type); if (sym_name) { objdump_print_symname (abfd, NULL, *q->sym_ptr_ptr); } else { if (section_name == NULL) section_name = "*unknown*"; printf ("[%s]", section_name); } if (q->addend) { printf ("+0x"); bfd_printf_vma (abfd, q->addend); } if (addend2) { printf ("+0x"); bfd_printf_vma (abfd, addend2); } printf ("\n"); } if (last_filename != NULL) free (last_filename); if (last_functionname != NULL) free (last_functionname); } static void dump_relocs_in_section (bfd *abfd, asection *section, void *dummy ATTRIBUTE_UNUSED) { arelent **relpp; long relcount; long relsize; if ( bfd_is_abs_section (section) || bfd_is_und_section (section) || bfd_is_com_section (section) || (! process_section_p (section)) || ((section->flags & SEC_RELOC) == 0)) return; relsize = bfd_get_reloc_upper_bound (abfd, section); if (relsize < 0) bfd_fatal (bfd_get_filename (abfd)); printf ("RELOCATION RECORDS FOR [%s]:", section->name); if (relsize == 0) { printf (" (none)\n\n"); return; } relpp = (arelent **) xmalloc (relsize); relcount = bfd_canonicalize_reloc (abfd, section, 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, section, relpp, relcount); printf ("\n\n"); } free (relpp); } static void dump_relocs (bfd *abfd) { bfd_map_over_sections (abfd, dump_relocs_in_section, NULL); } static void dump_dynamic_relocs (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, NULL, relpp, relcount); printf ("\n\n"); } free (relpp); } } /* Creates a table of paths, to search for source files. */ static void add_include_path (const char *path) { if (path[0] == 0) return; include_path_count++; include_paths = (const char **) xrealloc (include_paths, include_path_count * sizeof (*include_paths)); #ifdef HAVE_DOS_BASED_FILE_SYSTEM if (path[1] == ':' && path[2] == 0) path = concat (path, ".", (const char *) 0); #endif include_paths[include_path_count - 1] = path; } static void adjust_addresses (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *arg) { if ((section->flags & SEC_DEBUGGING) == 0) { bfd_boolean *has_reloc_p = (bfd_boolean *) arg; section->vma += adjust_section_vma; if (*has_reloc_p) section->lma += adjust_section_vma; } } /* Dump selected contents of ABFD. */ static void dump_bfd (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) { bfd_boolean has_reloc = (abfd->flags & HAS_RELOC); bfd_map_over_sections (abfd, adjust_addresses, &has_reloc); } if (! dump_debugging_tags && ! suppress_bfd_header) 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); if (dump_private_options != NULL) dump_target_specific (abfd); if (! dump_debugging_tags && ! suppress_bfd_header) putchar ('\n'); if (dump_section_headers) dump_headers (abfd); if (dump_symtab || dump_reloc_info || disassemble || dump_debugging || dump_dwarf_section_info) syms = slurp_symtab (abfd); if (dump_dynamic_symtab || dump_dynamic_reloc_info || (disassemble && bfd_get_dynamic_symtab_upper_bound (abfd) > 0)) dynsyms = slurp_dynamic_symtab (abfd); if (disassemble) { synthcount = bfd_get_synthetic_symtab (abfd, symcount, syms, dynsymcount, dynsyms, &synthsyms); if (synthcount < 0) synthcount = 0; } if (dump_symtab) dump_symbols (abfd, FALSE); if (dump_dynamic_symtab) dump_symbols (abfd, TRUE); if (dump_dwarf_section_info) dump_dwarf (abfd); if (dump_stab_section_info) dump_stabs (abfd); if (dump_reloc_info && ! disassemble) dump_relocs (abfd); if (dump_dynamic_reloc_info && ! disassemble) dump_dynamic_relocs (abfd); if (dump_section_contents) dump_data (abfd); if (disassemble) disassemble_data (abfd); if (dump_debugging) { void *dhandle; dhandle = read_debugging_info (abfd, syms, symcount, TRUE); if (dhandle != NULL) { if (!print_debugging_info (stdout, dhandle, abfd, syms, bfd_demangle, dump_debugging_tags ? TRUE : FALSE)) { non_fatal (_("%s: printing debugging information failed"), bfd_get_filename (abfd)); exit_status = 1; } } /* PR 6483: If there was no STABS or IEEE debug info in the file, try DWARF instead. */ else if (! dump_dwarf_section_info) { dump_dwarf (abfd); } } if (syms) { free (syms); syms = NULL; } if (dynsyms) { free (dynsyms); dynsyms = NULL; } if (synthsyms) { free (synthsyms); synthsyms = NULL; } symcount = 0; dynsymcount = 0; synthcount = 0; } static void display_bfd (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 (char *filename, char *target) { bfd *file; bfd *arfile = NULL; if (get_file_size (filename) < 1) { exit_status = 1; return; } file = bfd_openr (filename, target); if (file == NULL) { nonfatal (filename); return; } /* Decompress sections unless dumping the section contents. */ if (!dump_section_contents) file->flags |= BFD_DECOMPRESS; /* If the file is an archive, process all of its elements. */ if (bfd_check_format (file, bfd_archive)) { 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); } int main (int argc, char **argv) { int c; char *target = default_target; bfd_boolean seenflag = FALSE; #if defined (HAVE_SETLOCALE) #if defined (HAVE_LC_MESSAGES) setlocale (LC_MESSAGES, ""); #endif setlocale (LC_CTYPE, ""); #endif bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); program_name = *argv; xmalloc_set_program_name (program_name); START_PROGRESS (program_name, 0); expandargv (&argc, &argv); bfd_init (); set_default_bfd_target (); while ((c = getopt_long (argc, argv, "pP:ib:m:M:VvCdDlfFaHhrRtTxsSI:j:wE:zgeGW::", long_options, (int *) 0)) != EOF) { switch (c) { case 0: break; /* We've been given a long option. */ case 'm': machine = optarg; break; case 'M': if (disassembler_options) /* Ignore potential memory leak for now. */ disassembler_options = concat (disassembler_options, ",", optarg, (const char *) NULL); else disassembler_options = optarg; break; case 'j': add_only (optarg); break; case 'F': display_file_offsets = TRUE; break; case 'l': with_line_numbers = TRUE; break; case 'b': target = optarg; break; case 'C': do_demangle = TRUE; if (optarg != NULL) { enum demangling_styles style; style = cplus_demangle_name_to_style (optarg); if (style == unknown_demangling) fatal (_("unknown demangling style `%s'"), optarg); cplus_demangle_set_style (style); } 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"); if ((stop_address != (bfd_vma) -1) && stop_address <= start_address) fatal (_("error: the start address should be before the end address")); break; case OPTION_STOP_ADDRESS: stop_address = parse_vma (optarg, "--stop-address"); if ((start_address != (bfd_vma) -1) && stop_address <= start_address) fatal (_("error: the stop address should be after the start address")); break; case OPTION_PREFIX: prefix = optarg; prefix_length = strlen (prefix); /* Remove an unnecessary trailing '/' */ while (IS_DIR_SEPARATOR (prefix[prefix_length - 1])) prefix_length--; break; case OPTION_PREFIX_STRIP: prefix_strip = atoi (optarg); if (prefix_strip < 0) fatal (_("error: prefix strip must be non-negative")); break; case OPTION_INSN_WIDTH: insn_width = strtoul (optarg, NULL, 0); if (insn_width <= 0) fatal (_("error: instruction width must be positive")); break; case 'E': if (strcmp (optarg, "B") == 0) endian = BFD_ENDIAN_BIG; else if (strcmp (optarg, "L") == 0) endian = BFD_ENDIAN_LITTLE; else { nonfatal (_("unrecognized -E option")); 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 { non_fatal (_("unrecognized --endian type `%s'"), optarg); exit_status = 1; usage (stderr, 1); } break; case 'f': dump_file_header = TRUE; seenflag = TRUE; break; case 'i': formats_info = TRUE; seenflag = TRUE; break; case 'I': add_include_path (optarg); break; case 'p': dump_private_headers = TRUE; seenflag = TRUE; break; case 'P': dump_private_options = optarg; 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 'e': dump_debugging = 1; dump_debugging_tags = 1; do_demangle = TRUE; seenflag = TRUE; break; case 'W': dump_dwarf_section_info = TRUE; seenflag = TRUE; if (optarg) dwarf_select_sections_by_letters (optarg); else dwarf_select_sections_all (); break; case OPTION_DWARF: dump_dwarf_section_info = TRUE; seenflag = TRUE; if (optarg) dwarf_select_sections_by_names (optarg); else dwarf_select_sections_all (); break; case OPTION_DWARF_DEPTH: { char *cp; dwarf_cutoff_level = strtoul (optarg, & cp, 0); } break; case OPTION_DWARF_START: { char *cp; dwarf_start_die = strtoul (optarg, & cp, 0); suppress_bfd_header = 1; } 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': case 'V': show_version = TRUE; seenflag = TRUE; break; default: usage (stderr, 1); } } if (show_version) print_version ("objdump"); if (!seenflag) usage (stderr, 2); if (formats_info) exit_status = display_info (); else { if (optind == argc) display_file ("a.out", target); else for (; optind < argc;) display_file (argv[optind++], target); } free_only_list (); END_PROGRESS (program_name); return exit_status; }
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