binutils-gdb/binutils/objdump.c

/* objdump.c -- dump information about an object file.
   Copyright 1990, 1991, 1992, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "bfd.h"
#include "sysdep.h"
#include "getopt.h"
#include "bucomm.h"
#include <stdio.h>
#include <ctype.h>
#include "dis-asm.h"
#include "libiberty.h"

/* Internal headers for the ELF .stab-dump code - sorry.  */
#define	BYTES_IN_WORD	32
#include "aout/aout64.h"

#ifndef FPRINTF_ALREADY_DECLARED
extern int fprintf PARAMS ((FILE *, CONST char *, ...));
#endif

char *default_target = NULL;	/* default at runtime */

extern char *program_version;

int show_version = 0;		/* show the version number */
int dump_section_contents;	/* -s */
int dump_section_headers;	/* -h */
boolean dump_file_header;	/* -f */
int dump_symtab;		/* -t */
int dump_dynamic_symtab;	/* -T */
int dump_reloc_info;		/* -r */
int dump_dynamic_reloc_info;	/* -R */
int dump_ar_hdrs;		/* -a */
int with_line_numbers;		/* -l */
int dump_stab_section_info;	/* --stabs */
boolean disassemble;		/* -d */
boolean formats_info;		/* -i */
char *only;			/* -j secname */

/* Extra info to pass to the disassembler address printing function.  */
struct objdump_disasm_info {
  bfd *abfd;
  asection *sec;
};

/* Architecture to disassemble for, or default if NULL.  */
char *machine = (char *) NULL;

/* The symbol table.  */
asymbol **syms;

/* Number of symbols in `syms'.  */
long symcount = 0;

/* The dynamic symbol table.  */
asymbol **dynsyms;

/* Number of symbols in `dynsyms'.  */
long dynsymcount = 0;

/* Forward declarations.  */

static void
display_file PARAMS ((char *filename, char *target));

static void
dump_data PARAMS ((bfd *abfd));

static void
dump_relocs PARAMS ((bfd *abfd));

static void
dump_dynamic_relocs PARAMS ((bfd * abfd));

static void
dump_reloc_set PARAMS ((bfd *, arelent **, long));

static void
dump_symbols PARAMS ((bfd *abfd, boolean dynamic));

static void
display_bfd PARAMS ((bfd *abfd));

static void
objdump_print_address PARAMS ((bfd_vma, struct disassemble_info *));

void
usage (stream, status)
     FILE *stream;
     int status;
{
  fprintf (stream, "\
Usage: %s [-ahifdrRtTxsl] [-b bfdname] [-m machine] [-j section-name]\n\
       [--archive-headers] [--target=bfdname] [--disassemble] [--file-headers]\n\
       [--section-headers] [--headers] [--info] [--section=section-name]\n\
       [--line-numbers] [--architecture=machine] [--reloc] [--full-contents]\n\
       [--stabs] [--syms] [--all-headers] [--dynamic-syms] [--dynamic-reloc]\n\
       [--version] [--help] objfile...\n\
at least one option besides -l (--line-numbers) must be given\n",
	   program_name);
  exit (status);
}

static struct option long_options[]=
{
  {"all-headers", no_argument, NULL, 'x'},
  {"architecture", required_argument, NULL, 'm'},
  {"archive-headers", no_argument, NULL, 'a'},
  {"disassemble", no_argument, NULL, 'd'},
  {"dynamic-reloc", no_argument, NULL, 'R'},
  {"dynamic-syms", no_argument, NULL, 'T'},
  {"file-headers", no_argument, NULL, 'f'},
  {"full-contents", no_argument, NULL, 's'},
  {"headers", no_argument, NULL, 'h'},
  {"help", no_argument, NULL, 'H'},
  {"info", no_argument, NULL, 'i'},
  {"line-numbers", no_argument, NULL, 'l'},
  {"reloc", no_argument, NULL, 'r'},
  {"section", required_argument, NULL, 'j'},
  {"section-headers", no_argument, NULL, 'h'},
  {"stabs", no_argument, &dump_stab_section_info, 1},
  {"syms", no_argument, NULL, 't'},
  {"target", required_argument, NULL, 'b'},
  {"version", no_argument, &show_version,    1},
  {0, no_argument, 0, 0}
};

static void
dump_section_header (abfd, section, ignored)
     bfd *abfd;
     asection *section;
     PTR ignored;
{
  char *comma = "";

#define PF(x,y) \
  if (section->flags & x) {  printf("%s%s",comma,y); comma = ", "; }


  printf ("SECTION %d [%s]\t: size %08x",
	  section->index,
	  section->name,
	  (unsigned) bfd_get_section_size_before_reloc (section));
  printf (" vma ");
  printf_vma (section->vma);
  printf (" align 2**%u\n ",
	  section->alignment_power);
  PF (SEC_ALLOC, "ALLOC");
  PF (SEC_CONSTRUCTOR, "CONSTRUCTOR");
  PF (SEC_CONSTRUCTOR_TEXT, "CONSTRUCTOR TEXT");
  PF (SEC_CONSTRUCTOR_DATA, "CONSTRUCTOR DATA");
  PF (SEC_CONSTRUCTOR_BSS, "CONSTRUCTOR BSS");
  PF (SEC_LOAD, "LOAD");
  PF (SEC_RELOC, "RELOC");
#ifdef SEC_BALIGN
  PF (SEC_BALIGN, "BALIGN");
#endif
  PF (SEC_READONLY, "READONLY");
  PF (SEC_CODE, "CODE");
  PF (SEC_DATA, "DATA");
  PF (SEC_ROM, "ROM");
  PF (SEC_DEBUGGING, "DEBUGGING");
  printf ("\n");
#undef PF
}

static void
dump_headers (abfd)
     bfd *abfd;
{
  bfd_map_over_sections (abfd, dump_section_header, (PTR) NULL);
}

static asymbol **
slurp_symtab (abfd)
     bfd *abfd;
{
  asymbol **sy = (asymbol **) NULL;
  long storage;

  if (!(bfd_get_file_flags (abfd) & HAS_SYMS))
    {
      printf ("No symbols in \"%s\".\n", bfd_get_filename (abfd));
      return NULL;
    }

  storage = bfd_get_symtab_upper_bound (abfd);
  if (storage < 0)
    bfd_fatal (bfd_get_filename (abfd));

  if (storage)
    {
      sy = (asymbol **) xmalloc (storage);
    }
  symcount = bfd_canonicalize_symtab (abfd, sy);
  if (symcount < 0)
    bfd_fatal (bfd_get_filename (abfd));
  if (symcount == 0)
    fprintf (stderr, "%s: %s: No symbols\n",
	     program_name, bfd_get_filename (abfd));
  return sy;
}

/* Read in the dynamic symbols.  */

static asymbol **
slurp_dynamic_symtab (abfd)
     bfd *abfd;
{
  asymbol **sy = (asymbol **) NULL;
  long storage;

  if (!(bfd_get_file_flags (abfd) & DYNAMIC))
    {
      fprintf (stderr, "%s: %s: not a dynamic object\n",
	       program_name, bfd_get_filename (abfd));
      return NULL;
    }

  storage = bfd_get_dynamic_symtab_upper_bound (abfd);
  if (storage < 0)
    bfd_fatal (bfd_get_filename (abfd));

  if (storage)
    {
      sy = (asymbol **) xmalloc (storage);
    }
  dynsymcount = bfd_canonicalize_dynamic_symtab (abfd, sy);
  if (dynsymcount < 0)
    bfd_fatal (bfd_get_filename (abfd));
  if (dynsymcount == 0)
    fprintf (stderr, "%s: %s: No dynamic symbols\n",
	     program_name, bfd_get_filename (abfd));
  return sy;
}

/* Filter out (in place) symbols that are useless for disassembly.
   COUNT is the number of elements in SYMBOLS.
   Return the number of useful symbols. */

long
remove_useless_symbols (symbols, count)
     asymbol **symbols;
     long count;
{
  register asymbol **in_ptr = symbols, **out_ptr = symbols;

  while (--count >= 0)
    {
      asymbol *sym = *in_ptr++;

      if (sym->name == NULL || sym->name[0] == '\0')
	continue;
      if (sym->flags & (BSF_DEBUGGING))
	continue;
      if (sym->section == &bfd_und_section
	  || bfd_is_com_section (sym->section))
	continue;

      *out_ptr++ = sym;
    }
  return out_ptr - symbols;
}

/* Sort symbols into value order. */

static int 
compare_symbols (ap, bp)
     PTR ap;
     PTR bp;
{
  asymbol *a = *(asymbol **)ap;
  asymbol *b = *(asymbol **)bp;

  if (a->value > b->value)
    return 1;
  else if (a->value < b->value)
    return -1;

  if (a->section > b->section)
    return 1;
  else if (a->section < b->section)
    return -1;
  return 0;
}

/* Print VMA symbolically to INFO if possible.  */

static void
objdump_print_address (vma, info)
     bfd_vma vma;
     struct disassemble_info *info;
{
  /* @@ For relocateable files, should filter out symbols belonging to
     the wrong section.  Unfortunately, not enough information is supplied
     to this routine to determine the correct section in all cases.  */
  /* @@ 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 `syms'.  */
  long min = 0;
  long max = symcount;
  long thisplace;

  bfd_signed_vma vardiff;

  fprintf_vma (info->stream, vma);

  if (symcount < 1)
    return;

  /* 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 = syms[thisplace];

      vardiff = sym->value - vma;

      if (vardiff > 0)
	max = thisplace;
      else if (vardiff < 0)
	min = thisplace;
      else
	{
	  min = thisplace;
	  break;
	}
    }

  /* The symbol we want is now in min, the low end of the range we
     were searching.  */
  thisplace = min;

  {
    /* If this symbol isn't global, search for one with the same value
       that is.  */
    bfd_vma val = syms[thisplace]->value;
    long i;
    if (syms[thisplace]->flags & (BSF_LOCAL|BSF_DEBUGGING))
      for (i = thisplace - 1; i >= 0; i--)
	{
	  if (syms[i]->value == val
	      && (!(syms[i]->flags & (BSF_LOCAL|BSF_DEBUGGING))
		  || ((syms[thisplace]->flags & BSF_DEBUGGING)
		      && !(syms[i]->flags & BSF_DEBUGGING))))
	    {
	      thisplace = i;
	      break;
	    }
	}
    if (syms[thisplace]->flags & (BSF_LOCAL|BSF_DEBUGGING))
      for (i = thisplace + 1; i < symcount; i++)
	{
	  if (syms[i]->value == val
	      && (!(syms[i]->flags & (BSF_LOCAL|BSF_DEBUGGING))
		  || ((syms[thisplace]->flags & BSF_DEBUGGING)
		      && !(syms[i]->flags & BSF_DEBUGGING))))
	    {
	      thisplace = i;
	      break;
	    }
	}
  }
  {
    /* If the file is relocateable, and the symbol could be from this
       section, prefer a symbol from this section over symbols from
       others, even if the other symbol's value might be closer.
       
       Note that this may be wrong for some symbol references if the
       sections have overlapping memory ranges, but in that case there's
       no way to tell what's desired without looking at the relocation
       table.  */
    struct objdump_disasm_info *aux;
    long i;

    aux = (struct objdump_disasm_info *) info->application_data;
    if ((aux->abfd->flags & HAS_RELOC)
	&& vma >= bfd_get_section_vma (aux->abfd, aux->sec)
	&& vma < (bfd_get_section_vma (aux->abfd, aux->sec)
		  + bfd_get_section_size_before_reloc (aux->sec))
	&& syms[thisplace]->section != aux->sec)
      {
	for (i = thisplace + 1; i < symcount; i++)
	  {
	    if (syms[i]->value != syms[thisplace]->value)
	      {
		i--;
		break;
	      }
	  }
	for (; i >= 0; i--)
	  {
	    if (syms[i]->section == aux->sec)
	      {
		thisplace = i;
		break;
	      }
	  }
      }
  }
  fprintf (info->stream, " <%s", syms[thisplace]->name);
  if (syms[thisplace]->value > vma)
    {
      char buf[30], *p = buf;
      sprintf_vma (buf, syms[thisplace]->value - vma);
      while (*p == '0')
	p++;
      fprintf (info->stream, "-%s", p);
    }
  else if (vma > syms[thisplace]->value)
    {
      char buf[30], *p = buf;
      sprintf_vma (buf, vma - syms[thisplace]->value);
      while (*p == '0')
	p++;
      fprintf (info->stream, "+%s", p);
    }
  fprintf (info->stream, ">");
}

void
disassemble_data (abfd)
     bfd *abfd;
{
  long i;
  unsigned int (*print) () = 0; /* Old style */
  disassembler_ftype disassemble = 0; /* New style */
  struct disassemble_info disasm_info;
  struct objdump_disasm_info aux;

  int prevline;
  CONST char *prev_function = "";

  asection *section;

  boolean done_dot = false;

  /* Replace symbol section relative values with abs values.  */
  for (i = 0; i < symcount; i++)
    {
      syms[i]->value += syms[i]->section->vma;
    }

  symcount = remove_useless_symbols (syms, symcount);

  /* Sort the symbols into section and symbol order */
  qsort (syms, symcount, sizeof (asymbol *), compare_symbols);

  INIT_DISASSEMBLE_INFO(disasm_info, stdout);
  disasm_info.application_data = (PTR) &aux;
  aux.abfd = abfd;
  disasm_info.print_address_func = objdump_print_address;

  if (machine != (char *) NULL)
    {
      bfd_arch_info_type *info = bfd_scan_arch (machine);
      if (info == NULL)
	{
	  fprintf (stderr, "%s: Can't use supplied machine %s\n",
		   program_name,
		   machine);
	  exit (1);
	}
      abfd->arch_info = info;
    }

  /* See if we can disassemble using bfd.  */

  if (abfd->arch_info->disassemble)
    {
      print = abfd->arch_info->disassemble;
    }
  else
    {
      disassemble = disassembler (abfd);
      if (!disassemble)
	{
	  fprintf (stderr, "%s: Can't disassemble for architecture %s\n",
		   program_name,
		   bfd_printable_arch_mach (bfd_get_arch (abfd), 0));
	  exit (1);
	}
    }

  for (section = abfd->sections;
       section != (asection *) NULL;
       section = section->next)
    {
      bfd_byte *data = NULL;
      bfd_size_type datasize = 0;

      if (!(section->flags & SEC_LOAD))
	continue;
      if (only != (char *) NULL && strcmp (only, section->name) != 0)
	continue;

      printf ("Disassembly of section %s:\n", section->name);

      datasize = bfd_get_section_size_before_reloc (section);
      if (datasize == 0)
	continue;

      data = (bfd_byte *) xmalloc ((size_t) datasize);

      bfd_get_section_contents (abfd, section, data, 0, datasize);

      aux.sec = section;
      disasm_info.buffer = data;
      disasm_info.buffer_vma = section->vma;
      disasm_info.buffer_length = datasize;
      i = 0;
      while (i < disasm_info.buffer_length)
	{
	  if (data[i] == 0 && data[i + 1] == 0 && data[i + 2] == 0 &&
	      data[i + 3] == 0)
	    {
	      if (done_dot == false)
		{
		  printf ("...\n");
		  done_dot = true;
		}
	      i += 4;
	    }
	  else
	    {
	      done_dot = false;
	      if (with_line_numbers)
		{
		  CONST char *filename;
		  CONST char *functionname;
		  unsigned int line;

		  if (bfd_find_nearest_line (abfd,
					     section,
					     syms,
					     section->vma + i,
					     &filename,
					     &functionname,
					     &line))
		    {
		      if (functionname && *functionname
			  && strcmp(functionname, prev_function))
			{
			  printf ("%s():\n", functionname);
			  prev_function = functionname;
			}
		      if (!filename)
			filename = "???";
		      if (line && line != prevline)
			{
			  printf ("%s:%u\n", filename, line);
			  prevline = line;
			}
		    }
		}
	      objdump_print_address (section->vma + i, &disasm_info);
	      putchar (' ');

	      if (disassemble) /* New style */
		{
		  int bytes = (*disassemble)(section->vma + i,
					     &disasm_info);
		  if (bytes < 0)
		    break;
		  i += bytes;
		}
	      else /* Old style */
		i += print (section->vma + i,
			    data + i,
			    stdout);
	      putchar ('\n');
	    }
	}
      free (data);
    }
}


/* Define a table of stab values and print-strings.  We wish the initializer
   could be a direct-mapped table, but instead we build one the first
   time we need it.  */

char **stab_name;

struct stab_print {
  int value;
  char *string;
};

struct stab_print stab_print[] = {
#define __define_stab(NAME, CODE, STRING) {CODE, STRING},
#include "aout/stab.def"
#undef __define_stab
  {0, ""}
};

void dump_section_stabs PARAMS ((bfd *abfd, char *stabsect_name,
				 char *strsect_name));

/* Dump the stabs sections from an object file that has a section that
   uses Sun stabs encoding.  It has to use some hooks into BFD because
   string table sections are not normally visible to BFD callers.  */

void
dump_stabs (abfd)
     bfd *abfd;
{
  /* Allocate and initialize stab name array if first time.  */
  if (stab_name == NULL) 
    {
      int i;

      stab_name = (char **) xmalloc (256 * sizeof(char *));
      /* Clear the array. */
      for (i = 0; i < 256; i++)
	stab_name[i] = NULL;
      /* Fill in the defined stabs. */
      for (i = 0; *stab_print[i].string; i++)
	stab_name[stab_print[i].value] = stab_print[i].string;
    }

  dump_section_stabs (abfd, ".stab", ".stabstr");
  dump_section_stabs (abfd, ".stab.excl", ".stab.exclstr");
  dump_section_stabs (abfd, ".stab.index", ".stab.indexstr");
  dump_section_stabs (abfd, "$GDB_SYMBOLS$", "$GDB_STRINGS$");
}

static struct internal_nlist *stabs;
static bfd_size_type stab_size;

static char *strtab;
static bfd_size_type stabstr_size;

/* Read ABFD's stabs section STABSECT_NAME into `stabs'
   and string table section STRSECT_NAME into `strtab'.
   If the section exists and was read, allocate the space and return true.
   Otherwise return false.  */

boolean
read_section_stabs (abfd, stabsect_name, strsect_name)
     bfd *abfd;
     char *stabsect_name;
     char *strsect_name;
{
  asection *stabsect, *stabstrsect;

  stabsect = bfd_get_section_by_name (abfd, stabsect_name);
  if (0 == stabsect)
    {
      printf ("No %s section present\n\n", stabsect_name);
      return false;
    }

  stabstrsect = bfd_get_section_by_name (abfd, strsect_name);
  if (0 == stabstrsect)
    {
      fprintf (stderr, "%s: %s has no %s section\n", program_name,
	       bfd_get_filename (abfd), strsect_name);
      return false;
    }
 
  stab_size    = bfd_section_size (abfd, stabsect);
  stabstr_size = bfd_section_size (abfd, stabstrsect);

  stabs  = (struct internal_nlist *) xmalloc (stab_size);
  strtab = (char *) xmalloc (stabstr_size);
  
  if (! bfd_get_section_contents (abfd, stabsect, (PTR) stabs, 0, stab_size))
    {
      fprintf (stderr, "%s: Reading %s section of %s failed: %s\n",
	       program_name, stabsect_name, bfd_get_filename (abfd),
	       bfd_errmsg (bfd_get_error ()));
      free (stabs);
      free (strtab);
      return false;
    }

  if (! bfd_get_section_contents (abfd, stabstrsect, (PTR) strtab, 0,
				  stabstr_size))
    {
      fprintf (stderr, "%s: Reading %s section of %s failed: %s\n",
	       program_name, strsect_name, bfd_get_filename (abfd),
	       bfd_errmsg (bfd_get_error ()));
      free (stabs);
      free (strtab);
      return false;
    }

  return true;
}

#define SWAP_SYMBOL(symp, abfd) \
{ \
    (symp)->n_strx = bfd_h_get_32(abfd,			\
				  (unsigned char *)&(symp)->n_strx);	\
    (symp)->n_desc = bfd_h_get_16 (abfd,			\
				   (unsigned char *)&(symp)->n_desc);  	\
    (symp)->n_value = bfd_h_get_32 (abfd,			\
				    (unsigned char *)&(symp)->n_value);	\
}

/* Print ABFD's stabs section STABSECT_NAME (in `stabs'),
   using string table section STRSECT_NAME (in `strtab').  */

void
print_section_stabs (abfd, stabsect_name, strsect_name)
     bfd *abfd;
     char *stabsect_name;
     char *strsect_name;
{
  int i;
  unsigned file_string_table_offset = 0, next_file_string_table_offset = 0;
  struct internal_nlist *stabp = stabs,
  *stabs_end = (struct internal_nlist *) (stab_size + (char *) stabs);

  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++, i++)
    {
      SWAP_SYMBOL (stabp, abfd);
      printf ("\n%-6d ", i);
      /* Either print the stab name, or, if unnamed, print its number
	 again (makes consistent formatting for tools like awk). */
      if (stab_name[stabp->n_type])
	printf ("%-6s", stab_name[stabp->n_type]);
      else if (stabp->n_type == N_UNDF)
	printf ("HdrSym");
      else
	printf ("%-6d", stabp->n_type);
      printf (" %-6d %-6d ", stabp->n_other, stabp->n_desc);
      printf_vma (stabp->n_value);
      printf (" %-6lu", stabp->n_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 (stabp->n_type == N_UNDF)
	{
	  file_string_table_offset = next_file_string_table_offset;
	  next_file_string_table_offset += stabp->n_value;
	}
      else
	{
	  /* Using the (possibly updated) string table offset, print the
	     string (if any) associated with this symbol.  */

	  if ((stabp->n_strx + file_string_table_offset) < stabstr_size)
	    printf (" %s", &strtab[stabp->n_strx + file_string_table_offset]);
	  else
	    printf (" *");
	}
    }
  printf ("\n\n");
}

void
dump_section_stabs (abfd, stabsect_name, strsect_name)
     bfd *abfd;
     char *stabsect_name;
     char *strsect_name;
{
  if (read_section_stabs (abfd, stabsect_name, strsect_name))
    {
      print_section_stabs (abfd, stabsect_name, strsect_name);
      free (stabs);
      free (strtab);
    }
}

static void
dump_bfd_header (abfd)
     bfd *abfd;
{
  char *comma = "";

  printf ("architecture: %s, ",
	  bfd_printable_arch_mach (bfd_get_arch (abfd),
				   bfd_get_mach (abfd)));
  printf ("flags 0x%08x:\n", abfd->flags);

#define PF(x, y)    if (abfd->flags & x) {printf("%s%s", comma, y); comma=", ";}
  PF (HAS_RELOC, "HAS_RELOC");
  PF (EXEC_P, "EXEC_P");
  PF (HAS_LINENO, "HAS_LINENO");
  PF (HAS_DEBUG, "HAS_DEBUG");
  PF (HAS_SYMS, "HAS_SYMS");
  PF (HAS_LOCALS, "HAS_LOCALS");
  PF (DYNAMIC, "DYNAMIC");
  PF (WP_TEXT, "WP_TEXT");
  PF (D_PAGED, "D_PAGED");
  PF (BFD_IS_RELAXABLE, "BFD_IS_RELAXABLE");
  printf ("\nstart address 0x");
  printf_vma (abfd->start_address);
}

static void
display_bfd (abfd)
     bfd *abfd;
{
  char **matching;

  if (!bfd_check_format_matches (abfd, bfd_object, &matching))
    {
      bfd_nonfatal (bfd_get_filename (abfd));
      if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
	{
	  list_matching_formats (matching);
	  free (matching);
	}
      return;
    }

  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);
  putchar ('\n');
  if (dump_section_headers)
    dump_headers (abfd);
  if (dump_symtab || dump_reloc_info || disassemble)
    {
      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)
    dump_relocs (abfd);
  if (dump_dynamic_reloc_info)
    dump_dynamic_relocs (abfd);
  if (dump_section_contents)
    dump_data (abfd);
  /* Note that disassemble_data re-orders the syms table, but that is
     safe - as long as it is done last! */
  if (disassemble)
    disassemble_data (abfd);
}

static void
display_file (filename, target)
     char *filename;
     char *target;
{
  bfd *file, *arfile = (bfd *) NULL;

  file = bfd_openr (filename, target);
  if (file == NULL)
    {
      bfd_nonfatal (filename);
      return;
    }

  if (bfd_check_format (file, bfd_archive) == true)
    {
      bfd *last_arfile = NULL;

      printf ("In archive %s:\n", bfd_get_filename (file));
      for (;;)
	{
	  bfd_set_error (bfd_error_no_error);

	  arfile = bfd_openr_next_archived_file (file, arfile);
	  if (arfile == NULL)
	    {
	      if (bfd_get_error () != bfd_error_no_more_archived_files)
		{
		  bfd_nonfatal (bfd_get_filename (file));
		}
	      break;
	    }

	  display_bfd (arfile);

	  if (last_arfile != NULL)
	    bfd_close (last_arfile);
	  last_arfile = arfile;
	}

      if (last_arfile != NULL)
	bfd_close (last_arfile);
    }
  else
    display_bfd (file);

  bfd_close (file);
}

/* Actually display the various requested regions */

static void
dump_data (abfd)
     bfd *abfd;
{
  asection *section;
  bfd_byte *data = 0;
  bfd_size_type datasize = 0;
  bfd_size_type i;

  for (section = abfd->sections; section != NULL; section =
       section->next)
    {
      int onaline = 16;

      if (only == (char *) NULL ||
	  strcmp (only, section->name) == 0)
	{
	  if (section->flags & SEC_HAS_CONTENTS)
	    {
	      printf ("Contents of section %s:\n", section->name);

	      if (bfd_section_size (abfd, section) == 0)
		continue;
	      data = (bfd_byte *) xmalloc ((size_t) bfd_section_size (abfd, section));
	      datasize = bfd_section_size (abfd, section);


	      bfd_get_section_contents (abfd, section, (PTR) data, 0, bfd_section_size (abfd, section));

	      for (i = 0; i < bfd_section_size (abfd, section); i += onaline)
		{
		  bfd_size_type j;

		  printf (" %04lx ", (unsigned long int) (i + section->vma));
		  for (j = i; j < i + onaline; j++)
		    {
		      if (j < bfd_section_size (abfd, section))
			printf ("%02x", (unsigned) (data[j]));
		      else
			printf ("  ");
		      if ((j & 3) == 3)
			printf (" ");
		    }

		  printf (" ");
		  for (j = i; j < i + onaline; j++)
		    {
		      if (j >= bfd_section_size (abfd, section))
			printf (" ");
		      else
			printf ("%c", isprint (data[j]) ? data[j] : '.');
		    }
		  putchar ('\n');
		}
	      free (data);
	    }
	}
    }
}

/* Should perhaps share code and display with nm? */
static void
dump_symbols (abfd, dynamic)
     bfd *abfd;
     boolean dynamic;
{
  asymbol **current;
  long max;
  long count;

  if (dynamic)
    {
      current = dynsyms;
      max = dynsymcount;
      if (max == 0)
	return;
      printf ("DYNAMIC SYMBOL TABLE:\n");
    }
  else
    {
      current = syms;
      max = symcount;
      if (max == 0)
	return;
      printf ("SYMBOL TABLE:\n");
    }

  for (count = 0; count < max; count++)
    {
      if (*current)
	{
	  bfd *cur_bfd = bfd_asymbol_bfd(*current);
	  if (cur_bfd)
	    {
	      bfd_print_symbol (cur_bfd,
				stdout,
				*current, bfd_print_symbol_all);
	      printf ("\n");
	    }
	}
      current++;
    }
  printf ("\n");
  printf ("\n");
}

static void
dump_relocs (abfd)
     bfd *abfd;
{
  arelent **relpp;
  long relcount;
  asection *a;

  for (a = abfd->sections; a != (asection *) NULL; a = a->next)
    {
      long relsize;

      if (a == &bfd_abs_section)
	continue;
      if (a == &bfd_und_section)
	continue;
      if (bfd_is_com_section (a))
	continue;

      if (only)
	{
	  if (strcmp (only, a->name))
	    continue;
	}
      else if ((a->flags & SEC_RELOC) == 0)
	continue;

      printf ("RELOCATION RECORDS FOR [%s]:", a->name);

      relsize = bfd_get_reloc_upper_bound (abfd, a);
      if (relsize < 0)
	bfd_fatal (bfd_get_filename (abfd));

      if (relsize == 0)
	{
	  printf (" (none)\n\n");
	}
      else
	{
	  relpp = (arelent **) xmalloc (relsize);
	  /* Note that this must be done *before* we sort the syms table. */
	  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, relpp, relcount);
	      printf ("\n\n");
	    }
	  free (relpp);
	}
    }
}

static void
dump_dynamic_relocs (abfd)
     bfd *abfd;
{
  long relsize;
  arelent **relpp;
  long relcount;

  printf ("DYNAMIC RELOCATION RECORDS");

  relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
  if (relsize < 0)
    bfd_fatal (bfd_get_filename (abfd));

  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, relpp, relcount);
	  printf ("\n\n");
	}
      free (relpp);
    }
}

static void
dump_reloc_set (abfd, relpp, relcount)
     bfd *abfd;
     arelent **relpp;
     long relcount;
{
  arelent **p;

  /* Get column headers lined up reasonably.  */
  {
    static int width;
    if (width == 0)
      {
	char buf[30];
	sprintf_vma (buf, (bfd_vma) -1);
	width = strlen (buf) - 7;
      }
    printf ("OFFSET %*s TYPE %*s VALUE \n", width, "", 12, "");
  }

  for (p = relpp; relcount && *p != (arelent *) NULL; p++, relcount--)
    {
      arelent *q = *p;
      CONST char *sym_name;
      CONST char *section_name;

      if (q->sym_ptr_ptr && *q->sym_ptr_ptr)
	{
	  sym_name = (*(q->sym_ptr_ptr))->name;
	  section_name = (*(q->sym_ptr_ptr))->section->name;
	}
      else
	{
	  sym_name = NULL;
	  section_name = NULL;
	}
      if (sym_name)
	{
	  printf_vma (q->address);
	  printf (" %-16s  %s",
		  q->howto->name,
		  sym_name);
	}
      else
	{
	  if (section_name == (CONST char *) NULL)
	    section_name = "*unknown*";
	  printf_vma (q->address);
	  printf (" %-16s  [%s]",
		  q->howto->name,
		  section_name);
	}
      if (q->addend)
	{
	  printf ("+0x");
	  printf_vma (q->addend);
	}
      printf ("\n");
    }
}

/* The length of the longest architecture name + 1.  */
#define LONGEST_ARCH sizeof("rs6000:6000")

/* List the targets that BFD is configured to support, each followed
   by its endianness and the architectures it supports.  */

static void
display_target_list ()
{
  extern char *tmpnam ();
  extern bfd_target *bfd_target_vector[];
  char *dummy_name;
  int t;

  dummy_name = tmpnam ((char *) NULL);
  for (t = 0; bfd_target_vector[t]; t++)
    {
      bfd_target *p = bfd_target_vector[t];
      bfd *abfd = bfd_openw (dummy_name, p->name);
      int a;

      printf ("%s\n (header %s, data %s)\n", p->name,
	      p->header_byteorder_big_p ? "big endian" : "little endian",
	      p->byteorder_big_p ? "big endian" : "little endian");

      if (abfd == NULL)
	{
	  bfd_nonfatal (dummy_name);
	  continue;
	}

      if (! bfd_set_format (abfd, bfd_object))
	{
	  if (bfd_get_error () != bfd_error_invalid_operation)
	    bfd_nonfatal (p->name);
	  continue;
	}

      for (a = (int) bfd_arch_obscure + 1; a < (int) bfd_arch_last; a++)
	if (bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0))
	  printf ("  %s\n",
		  bfd_printable_arch_mach ((enum bfd_architecture) a, 0));
    }
  unlink (dummy_name);
}

/* Print a table showing which architectures are supported for entries
   FIRST through LAST-1 of bfd_target_vector (targets across,
   architectures down).  */

static void
display_info_table (first, last)
     int first;
     int last;
{
  extern bfd_target *bfd_target_vector[];
  extern char *tmpnam ();
  int t, a;
  char *dummy_name;

  /* Print heading of target names.  */
  printf ("\n%*s", (int) LONGEST_ARCH, " ");
  for (t = first; t < last && bfd_target_vector[t]; t++)
    printf ("%s ", bfd_target_vector[t]->name);
  putchar ('\n');

  dummy_name = tmpnam ((char *) NULL);
  for (a = (int) bfd_arch_obscure + 1; a < (int) bfd_arch_last; a++)
    if (strcmp (bfd_printable_arch_mach (a, 0), "UNKNOWN!") != 0)
      {
	printf ("%*s ", (int) LONGEST_ARCH - 1,
		bfd_printable_arch_mach (a, 0));
	for (t = first; t < last && bfd_target_vector[t]; t++)
	  {
	    bfd_target *p = bfd_target_vector[t];
	    boolean ok = true;
	    bfd *abfd = bfd_openw (dummy_name, p->name);

	    if (abfd == NULL)
	      {
		bfd_nonfatal (p->name);
		ok = false;
	      }

	    if (ok)
	      {
		if (! bfd_set_format (abfd, bfd_object))
		  {
		    if (bfd_get_error () != bfd_error_invalid_operation)
		      bfd_nonfatal (p->name);
		    ok = false;
		  }
	      }

	    if (ok)
	      {
		if (! bfd_set_arch_mach (abfd, a, 0))
		  ok = false;
	      }

	    if (ok)
	      printf ("%s ", p->name);
	    else
	      {
		int l = strlen (p->name);
		while (l--)
		  putchar ('-');
		putchar (' ');
	      }
	  }
	putchar ('\n');
      }
  unlink (dummy_name);
}

/* Print tables of all the target-architecture combinations that
   BFD has been configured to support.  */

static void
display_target_tables ()
{
  int t, columns;
  extern bfd_target *bfd_target_vector[];
  char *colum;
  extern char *getenv ();

  columns = 0;
  colum = getenv ("COLUMNS");
  if (colum != NULL)
    columns = atoi (colum);
  if (columns == 0)
    columns = 80;

  t = 0;
  while (bfd_target_vector[t] != NULL)
    {
      int oldt = t, wid;

      wid = LONGEST_ARCH + strlen (bfd_target_vector[t]->name) + 1;
      ++t;
      while (wid < columns && bfd_target_vector[t] != NULL)
	{
	  int newwid;

	  newwid = wid + strlen (bfd_target_vector[t]->name) + 1;
	  if (newwid >= columns)
	    break;
	  wid = newwid;
	  ++t;
	}
      display_info_table (oldt, t);
    }
}

static void
display_info ()
{
  printf ("BFD header file version %s\n", BFD_VERSION);
  display_target_list ();
  display_target_tables ();
}

int
main (argc, argv)
     int argc;
     char **argv;
{
  int c;
  char *target = default_target;
  boolean seenflag = false;

  program_name = *argv;
  xmalloc_set_program_name (program_name);

  bfd_init ();

  while ((c = getopt_long (argc, argv, "ib:m:VdlfahrRtTxsj:", long_options,
			   (int *) 0))
	 != EOF)
    {
      seenflag = true;
      switch (c)
	{
	case 0:
	  break;		/* we've been given a long option */
	case 'm':
	  machine = optarg;
	  break;
	case 'j':
	  only = optarg;
	  break;
	case 'l':
	  with_line_numbers = 1;
	  break;
	case 'b':
	  target = optarg;
	  break;
	case 'f':
	  dump_file_header = true;
	  break;
	case 'i':
	  formats_info = true;
	  break;
	case 'x':
	  dump_symtab = 1;
	  dump_reloc_info = 1;
	  dump_file_header = true;
	  dump_ar_hdrs = 1;
	  dump_section_headers = 1;
	  break;
	case 't':
	  dump_symtab = 1;
	  break;
	case 'T':
	  dump_dynamic_symtab = 1;
	  break;
	case 'd':
	  disassemble = true;
	  break;
	case 's':
	  dump_section_contents = 1;
	  break;
	case 'r':
	  dump_reloc_info = 1;
	  break;
	case 'R':
	  dump_dynamic_reloc_info = 1;
	  break;
	case 'a':
	  dump_ar_hdrs = 1;
	  break;
	case 'h':
	  dump_section_headers = 1;
	  break;
	case 'H':
	  usage (stdout, 0);
	case 'V':
	  show_version = 1;
	  break;
	default:
	  usage (stderr, 1);
	}
    }

  if (show_version)
    {
      printf ("GNU %s version %s\n", program_name, program_version);
      exit (0);
    }

  if (seenflag == false)
    usage (stderr, 1);

  if (formats_info)
    {
      display_info ();
    }
  else
    {
      if (optind == argc)
	display_file ("a.out", target);
      else
	for (; optind < argc;)
	  display_file (argv[optind++], target);
    }
  return 0;
}