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fd7bb956ee
binutils-gdb/binutils/objdump.c
Alan Modra fd7bb956ee * objdump.c: Remove unnecessary prototypes. 
(disassemble_bytes): Add rel_offset parameter.  Simplify reloc skipping
	code, and print relocs when dump_dynamic_reloc_info.
	(disassemble_data): Read and handle dynamic relocs.  Correct reloc
	skip code.  Formatting.
	(dump_bfd): Don't dump dynamic relocs when disassembling.
2003-07-30 03:54:15 +00:00

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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
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 "bfdver.h"
#include "progress.h"
#include "bucomm.h"
#include "budemang.h"
#include "getopt.h"
#include "safe-ctype.h"
#include "dis-asm.h"
#include "libiberty.h"
#include "demangle.h"
#include "debug.h"
#include "budbg.h"
/* 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 (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 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 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_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 char **only; /* -j secname */
static size_t only_size = 0;
static size_t only_used = 0;
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 int dump_debugging_tags; /* --debugging-tags */
static bfd_vma adjust_section_vma = 0; /* --adjust-vma */
static int file_start_context = 0; /* --file-start-context */
/* Extra info to pass to the disassembler address printing function. */
struct objdump_disasm_info
{
bfd *abfd;
asection *sec;
bfd_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 bfd_byte *stabs;
static bfd_size_type stab_size;
static char *strtab;
static bfd_size_type stabstr_size;
/* Forward declarations. */
static void dump_data (bfd *);
static void dump_relocs (bfd *);
static void dump_dynamic_relocs (bfd *);
static void dump_reloc_set (bfd *, asection *, arelent **, long);
static void dump_symbols (bfd *, bfd_boolean);
static void dump_section_stabs (bfd *, char *, char *);
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\
-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\
-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=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\
-l, --line-numbers Include line numbers and filenames in output\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\
--adjust-vma=OFFSET Add OFFSET to all displayed section addresses\n\
\n"));
list_supported_targets (program_name, stream);
list_supported_architectures (program_name, stream);
disassembler_usage (stream);
}
if (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_ADJUST_VMA
};
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'},
{"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-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'},
{"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 (const char *msg)
{
bfd_nonfatal (msg);
exit_status = 1;
}
static void
dump_section_header (bfd *abfd ATTRIBUTE_UNUSED, asection *section,
void *ignored ATTRIBUTE_UNUSED)
{
char *comma = "";
unsigned 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);
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");
PF (SEC_BLOCK, "BLOCK");
PF (SEC_CLINK, "CLINK");
PF (SEC_SMALL_DATA, "SMALL_DATA");
PF (SEC_SHARED, "SHARED");
PF (SEC_ARCH_BIT_0, "ARCH_BIT_0");
PF (SEC_THREAD_LOCAL, "THREAD_LOCAL");
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 (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"));
if (abfd->flags & HAS_LOAD_PAGE)
printf (_(" Pg"));
printf ("\n");
bfd_map_over_sections (abfd, dump_section_header, NULL);
}
static asymbol **
slurp_symtab (bfd *abfd)
{
asymbol **sy = (asymbol **) 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 = (asymbol **) 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));
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))
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 VMA to STREAM. If SKIP_ZEROES is TRUE, omit leading zeroes. */
static void
objdump_print_value (bfd_vma vma, struct disassemble_info *info,
bfd_boolean skip_zeroes)
{
char buf[30];
char *p;
struct objdump_disasm_info *aux
= (struct objdump_disasm_info *) info->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;
}
(*info->fprintf_func) (info->stream, "%s", p);
}
/* Print the name of a symbol. */
static void
objdump_print_symname (bfd *abfd, struct disassemble_info *info,
asymbol *sym)
{
char *alloc;
const char *name;
alloc = NULL;
name = bfd_asymbol_name (sym);
if (do_demangle && name[0] != '\0')
{
/* Demangle the name. */
alloc = demangle (abfd, name);
name = alloc;
}
if (info != NULL)
(*info->fprintf_func) (info->stream, "%s", name);
else
printf ("%s", name);
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 (bfd *abfd, asection *sec, bfd_vma vma,
bfd_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;
unsigned 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 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. */
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 (bfd *abfd, asection *sec, asymbol *sym,
bfd_vma vma, struct disassemble_info *info,
bfd_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 (bfd_vma vma, struct disassemble_info *info,
bfd_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 (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 (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 (struct print_file_list *p, unsigned int line,
bfd_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 (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 = 0;
}
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;
if (file_start_context)
l = 0;
else
l = line - SHOW_PRECEDING_CONTEXT_LINES;
if (l < 0)
l = 0;
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
objdump_sprintf (SFILE *f, const char *format, ...)
{
char *buf;
size_t n;
va_list args;
va_start (args, format);
vasprintf (&buf, format, args);
if (buf == NULL)
{
va_end (args);
fatal (_("Out of virtual memory"));
}
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);
va_end (args);
return n;
}
/* The number of zeroes we want to see before we start skipping them.
The number is arbitrarily chosen. */
#ifndef SKIP_ZEROES
#define SKIP_ZEROES (8)
#endif
/* 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. */
#ifndef SKIP_ZEROES_AT_END
#define SKIP_ZEROES_AT_END (3)
#endif
/* Disassemble some data in memory between given values. */
static void
disassemble_bytes (struct disassemble_info * info,
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;
bfd_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;
bfd_sprintf_vma
(aux->abfd, 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;
bfd_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)
/* The line number tables will refer to unadjusted
section VMAs, so we must undo any VMA modifications
when calling show_line. */
show_line (aux->abfd, section, addr_offset - adjust_section_vma);
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, 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;
#ifdef DISASSEMBLER_NEEDS_RELOCS
/* FIXME: This is wrong. It tests the number of octets
in the last instruction, not the current one. */
if (*relppp < relppend
&& (**relppp)->address >= rel_offset + addr_offset
&& ((**relppp)->address
< rel_offset + addr_offset + octets / opb))
info->flags = INSN_HAS_RELOC;
else
#endif
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;
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 && 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;
}
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 + 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 (bfd *abfd)
{
unsigned long addr_offset;
disassembler_ftype disassemble_fn;
struct disassemble_info disasm_info;
struct objdump_disasm_info aux;
asection *section;
unsigned int opb;
arelent **dynrelbuf = NULL;
long relcount = 0;
bfd_vma rel_offset;
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 = (void *) &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;
if (machine != (char *) NULL)
{
const bfd_arch_info_type *info = bfd_scan_arch (machine);
if (info == NULL)
fatal (_("Can't use supplied machine %s"), machine);
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)
{
non_fatal (_("Can't disassemble for architecture %s\n"),
bfd_printable_arch_mach (bfd_get_arch (abfd), 0));
exit_status = 1;
return;
}
opb = bfd_octets_per_byte (abfd);
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 = opb;
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;
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)
{
dynrelbuf = (arelent **) xmalloc (relsize);
relcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, dynsyms);
if (relcount < 0)
bfd_fatal (bfd_get_filename (abfd));
/* Sort the relocs by address. */
qsort (dynrelbuf, relcount, sizeof (arelent *), compare_relocs);
}
}
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;
unsigned long stop_offset;
asymbol *sym = NULL;
long place = 0;
/* Sections that do not contain machine code are not normally
disassembled. */
if (! disassemble_all
&& only == NULL
&& (section->flags & SEC_CODE) == 0)
continue;
if (only != NULL)
{
size_t i;
for (i = 0; i < only_used; i++)
if (strcmp (only [i], section->name) == 0)
break;
if (i == only_used)
continue;
}
if (dynrelbuf == NULL)
relcount = 0;
if ((section->flags & SEC_RELOC) != 0
#ifndef DISASSEMBLER_NEEDS_RELOCS
&& dump_reloc_info
#endif
&& dynrelbuf == NULL)
{
long relsize;
relsize = bfd_get_reloc_upper_bound (abfd, section);
if (relsize < 0)
bfd_fatal (bfd_get_filename (abfd));
if (relsize > 0)
{
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);
}
}
datasize = bfd_get_section_size_before_reloc (section);
if (datasize == 0)
continue;
printf (_("Disassembly of section %s:\n"), section->name);
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;
disasm_info.section = section;
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 (dynrelbuf)
{
relpp = dynrelbuf;
/* Dynamic reloc addresses are absolute, non-dynamic are
section relative. REL_OFFSET specifies the reloc address
corresponnding to the start of this section. */
rel_offset = disasm_info.buffer_vma;
}
else
{
relpp = relbuf;
rel_offset = 0;
}
relppend = relpp + relcount;
/* Skip over the relocs belonging to addresses below the
start address. */
while (relpp < relppend
&& (*relpp)->address < rel_offset + addr_offset)
++relpp;
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;
unsigned long nextstop_offset;
bfd_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)
{
(* disasm_info.fprintf_func) (disasm_info.stream, "\n");
objdump_print_addr_with_sym (abfd, section, sym,
section->vma + addr_offset,
&disasm_info,
FALSE);
(* disasm_info.fprintf_func) (disasm_info.stream, ":\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,
rel_offset, &relpp, relppend);
addr_offset = nextstop_offset;
sym = nextsym;
}
free (data);
if (relbuf != NULL)
free (relbuf);
}
if (dynrelbuf != NULL)
free (dynrelbuf);
free (sorted_syms);
}
/* Dump the stabs sections from an object file that has a section that
uses Sun stabs encoding. */
static void
dump_stabs (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, "$GDB_SYMBOLS$", "$GDB_STRINGS$");
}
/* 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 bfd_boolean
read_section_stabs (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)
{
non_fatal (_("%s has no %s section"),
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, (void *) stabs, 0, stab_size))
{
non_fatal (_("Reading %s section of %s failed: %s"),
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, (void *) strtab, 0,
stabstr_size))
{
non_fatal (_("Reading %s section of %s failed: %s\n"),
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 (bfd *abfd, const char *stabsect_name,
const char *strsect_name ATTRIBUTE_UNUSED)
{
int i;
unsigned file_string_table_offset = 0;
unsigned 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);
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");
}
static void
dump_section_stabs (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 (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 (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");
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);
}
/* 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)
{
asection *s;
for (s = abfd->sections; s != NULL; s = s->next)
{
s->vma += adjust_section_vma;
s->lma += adjust_section_vma;
}
}
if (! dump_debugging_tags)
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_debugging_tags)
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 && ! 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);
if (dhandle != NULL)
{
if (! print_debugging_info (stdout, dhandle, abfd, syms, demangle,
dump_debugging_tags ? TRUE : FALSE))
{
non_fatal (_("%s: printing debugging information failed"),
bfd_get_filename (abfd));
exit_status = 1;
}
}
}
if (syms)
{
free (syms);
syms = NULL;
}
if (dynsyms)
{
free (dynsyms);
dynsyms = NULL;
}
}
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, *arfile = (bfd *) NULL;
file = bfd_openr (filename, target);
if (file == NULL)
{
nonfatal (filename);
return;
}
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);
}
/* Actually display the various requested regions. */
static void
dump_data (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;
unsigned int opb = bfd_octets_per_byte (abfd);
for (section = abfd->sections; section != NULL; section =
section->next)
{
int onaline = 16;
size_t i;
for (i = 0; i < only_used; i++)
if (strcmp (only [i], section->name) == 0)
break;
if (only_used == 0 || i != only_used)
{
if (section->flags & SEC_HAS_CONTENTS)
{
char buf[64];
int count, width;
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, (void *) 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;
}
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);
}
}
}
}
/* Should perhaps share code and display with nm? */
static void
dump_symbols (bfd *abfd ATTRIBUTE_UNUSED, bfd_boolean dynamic)
{
asymbol **current;
long max;
long count;
if (dynamic)
{
current = dynsyms;
max = dynsymcount;
printf ("DYNAMIC SYMBOL TABLE:\n");
}
else
{
current = syms;
max = symcount;
printf ("SYMBOL TABLE:\n");
}
if (max == 0)
printf (_("no symbols\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 = (*current)->name;
alloc = NULL;
if (do_demangle && name != NULL && *name != '\0')
{
/* 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 = demangle (cur_bfd, name);
(*current)->name = alloc;
}
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 (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)
{
size_t i;
for (i = 0; i < only_used; i++)
if (strcmp (only [i], a->name) == 0)
break;
if (i == only_used)
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 (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 (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 != (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)
{
bfd_printf_vma (abfd, 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*";
bfd_printf_vma (abfd, q->address);
printf (" %-16s [%s]",
q->howto->name,
section_name);
}
if (q->addend)
{
printf ("+0x");
bfd_printf_vma (abfd, q->addend);
}
printf ("\n");
}
}
int
main (int argc, char **argv)
{
int c;
char *target = default_target;
bfd_boolean seenflag = FALSE;
#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
setlocale (LC_MESSAGES, "");
#endif
#if defined (HAVE_SETLOCALE)
setlocale (LC_CTYPE, "");
#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:VvCdDlfaHhrRtTxsSj:wE:zgeG",
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, NULL);
else
disassembler_options = optarg;
break;
case 'j':
if (only == NULL)
{
only_size = 8;
only = (char **) xmalloc (only_size * sizeof (char *));
}
else if (only_used == only_size)
{
only_size += 8;
only = (char **) xrealloc (only,
only_size * sizeof (char *));
}
only [only_used++] = optarg;
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");
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
{
non_fatal (_("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);
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 'e':
dump_debugging = 1;
dump_debugging_tags = 1;
do_demangle = TRUE;
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':
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);
}
END_PROGRESS (program_name);
return exit_status;
}
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