731 lines
16 KiB
C
731 lines
16 KiB
C
/*** objdump.c -- dump information about an object file. */
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/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Diddler.
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BFD is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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BFD is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with BFD; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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$Id$
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*/
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/*
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* Until there is other documentation, refer to the manual page dump(1) in
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* the system 5 program's reference manual
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*/
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#include "sysdep.h"
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#include "bfd.h"
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#include "getopt.h"
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#include <stdio.h>
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#include <ctype.h>
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char *xmalloc();
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char *default_target = NULL; /* default at runtime */
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char *program_name = NULL;
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int dump_section_contents; /* -s */
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int dump_section_headers; /* -h */
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boolean dump_file_header; /* -f */
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int dump_symtab; /* -t */
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int dump_reloc_info; /* -r */
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int dump_ar_hdrs; /* -a */
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int with_line_numbers; /* -l */
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boolean disassemble; /* -d */
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boolean info; /* -i */
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char *only;
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PROTO (void, display_file, (char *filename, char *target));
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PROTO (void, dump_data, (bfd *abfd));
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PROTO (void, dump_relocs, (bfd *abfd));
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PROTO (void, dump_symbols, (bfd *abfd));
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PROTO (void, print_arelt_descr, (bfd *abfd, boolean verbose));
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char *machine = (char *)NULL;
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asymbol **syms;
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asymbol **syms2;
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unsigned int storage;
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unsigned int symcount = 0;
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void
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usage ()
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{
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fprintf (stderr,
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"usage: %s [-ahifdrtxsl] [-m machine] [-j section_name] obj ...\n",
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program_name);
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exit (1);
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}
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static struct option long_options[] =
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{{"syms", 0, &dump_symtab, 1},
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{"reloc", 0, &dump_reloc_info, 1},
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{"header", 0, &dump_section_headers, 1},
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{0, 0, 0, 0}};
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static void
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dump_headers(abfd)
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bfd *abfd;
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{
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asection *section;
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for (section = abfd->sections;
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section != (asection *) NULL;
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section = section->next)
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{
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char *comma = "";
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#define PF(x,y) \
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if (section->flags & x) { printf("%s%s",comma,y); comma = ", "; }
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printf("SECTION %d [%s]\t: size %08x",
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section->index,
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section->name,
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(unsigned) section->size);
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printf(" vma %08lx align 2**%2u\n ",
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section->vma,
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section->alignment_power);
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PF(SEC_ALLOC,"ALLOC");
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PF(SEC_LOAD,"LOAD");
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PF(SEC_RELOC,"RELOC");
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PF(SEC_BALIGN,"BALIGN");
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PF(SEC_READONLY,"READONLY");
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PF(SEC_CODE,"CODE");
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PF(SEC_DATA,"DATA");
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PF(SEC_ROM,"ROM");
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printf("\n");
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#undef PF
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}
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}
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static asymbol **
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slurp_symtab(abfd)
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bfd *abfd;
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{
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asymbol **sy;
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if (!(bfd_get_file_flags (abfd) & HAS_SYMS)) {
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(void) printf ("No symbols in \"%s\".\n", bfd_get_filename (abfd));
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return(NULL);
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}
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storage = get_symtab_upper_bound (abfd);
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if (storage) {
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sy = (asymbol **) malloc (storage);
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if (sy == NULL) {
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fprintf (stderr, "%s: out of memory.\n", program_name);
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exit (1);
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}
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}
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symcount = bfd_canonicalize_symtab (abfd, sy);
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return sy;
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}
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/* Sort symbols into value order */
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static int comp(ap,bp)
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asymbol **ap;
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asymbol **bp;
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{
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asymbol *a = *ap;
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asymbol *b = *bp;
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int diff;
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if ( a->name== (char *)NULL || (a->flags &( BSF_DEBUGGING| BSF_UNDEFINED) ))
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a->the_bfd = 0;
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if ( b->name== (char *)NULL || (b->flags &( BSF_DEBUGGING|BSF_UNDEFINED)))
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b->the_bfd =0;
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diff = a->the_bfd - b->the_bfd;
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if (diff) {
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return -diff;
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}
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diff = a->value - b->value;
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if (diff) {
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return diff;
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}
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return a->section - b->section;
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}
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/* Print the supplied address symbolically if possible */
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void
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print_address(vma, stream)
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bfd_vma vma;
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FILE *stream;
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{
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/* Perform a binary search looking for the closest symbol to
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the required value */
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unsigned int min = 0;
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unsigned int max = symcount;
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unsigned int thisplace = 1;
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unsigned int oldthisplace ;
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int vardiff;
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if (symcount == 0)
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fprintf(stream,"%08lx", vma);
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else {
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while (true) {
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oldthisplace = thisplace;
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thisplace = (max + min )/2 ;
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if (thisplace == oldthisplace) break;
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vardiff = syms[thisplace]->value - vma;
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if (vardiff) {
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if (vardiff > 0) {
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max = thisplace;
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}
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else {
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min = thisplace;
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}
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}
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else {
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/* Totally awesome! the exact right symbol */
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fprintf(stream,"%08lx (%s)", vma, syms[thisplace]->name);
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return;
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}
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}
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/* We've run out of places to look, print the symbol before this one */
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/* see if this or the symbol before describes this location the best */
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if (thisplace != 0) {
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if (syms[thisplace-1]->value - vma >
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syms[thisplace]->value-vma) {
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/* Previous symbol is in correct section and is closer */
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thisplace --;
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}
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}
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if (syms[thisplace]->value > vma) {
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fprintf(stream,"%08lx (%s-%lx)", vma, syms[thisplace]->name,
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syms[thisplace]->value - vma);
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}
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else {
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fprintf(stream,"%08lx (%s+%lx)", vma,
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syms[thisplace]->name,
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vma - syms[thisplace]->value);
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}
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}
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}
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void
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disassemble_data(abfd)
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bfd *abfd;
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{
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bfd_byte *data = NULL;
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unsigned int datasize = 0;
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unsigned int i;
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int (*print)() ;
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int print_insn_m68k();
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int print_insn_i960();
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int print_insn_sparc();
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enum bfd_architecture a;
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unsigned long m;
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asection *section;
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/* Replace symbol section relative values with abs values */
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for (i = 0; i < symcount; i++) {
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if (syms[i]->section != (asection *)NULL) {
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syms[i]->value += syms[i]->section->vma;
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}
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}
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/* We keep a copy of the symbols in the original order */
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syms2 = slurp_symtab(abfd);
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/* Sort the symbols into section and symbol order */
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(void) qsort(syms, symcount, sizeof(asymbol *), comp);
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/* Find the first useless symbol */
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{ unsigned int i;
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for (i =0; i < symcount; i++) {
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if (syms[i]->the_bfd == 0) {
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symcount =i;
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break;
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}
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}
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}
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if (machine!= (char *)NULL) {
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if (bfd_scan_arch_mach(machine, &a, &m) == false) {
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fprintf(stderr,"%s: Can't use supplied machine %s\n",
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program_name,
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machine);
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exit(1);
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}
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}
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else {
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a = bfd_get_architecture(abfd);
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}
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switch (a) {
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case bfd_arch_sparc:
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print = print_insn_sparc;
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break;
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case bfd_arch_m68k:
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print = print_insn_m68k;
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break;
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case bfd_arch_i960:
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print = print_insn_i960;
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break;
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default:
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fprintf(stderr,"%s: Can't disassemble for architecture %s\n",
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program_name,
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bfd_printable_arch_mach(bfd_get_architecture(abfd),0));
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exit(1);
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}
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for (section = abfd->sections;
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section != (asection *)NULL;
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section = section->next) {
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if (only == (char *)NULL || strcmp(only,section->name) == 0){
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printf("Disassembly of section %s:\n", section->name);
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if (section->size == 0) continue;
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data = (bfd_byte *)malloc(section->size);
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if (data == (bfd_byte *)NULL) {
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fprintf (stderr, "%s: memory exhausted.\n", program_name);
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exit (1);
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}
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datasize = section->size;
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bfd_get_section_contents (abfd, section, data, 0, section->size);
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i = 0;
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while ((size_t)i <section->size) {
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if (with_line_numbers) {
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static prevline;
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char *filename;
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char *functionname;
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int line;
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bfd_find_nearest_line(abfd,
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section,
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syms,
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section->vma + i,
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&filename,
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&functionname,
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&line);
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if (filename && functionname && line && line != prevline) {
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printf("%s:%d\n", filename, line);
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prevline = line;
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}
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}
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print_address(section->vma + i, stdout);
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printf(" ");
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i += print(section->vma + i,
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data + i,
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stdout);
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putchar ('\n') ;
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}
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free(data);
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}
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}
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}
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void
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display_bfd (abfd)
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bfd *abfd;
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{
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if (!bfd_check_format (abfd, bfd_object)) {
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fprintf (stderr,"%s: %s not an object file\n", program_name,
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abfd->filename);
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return;
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}
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printf ("\n%s: file format %s\n", abfd->filename, abfd->xvec->name);
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if (dump_ar_hdrs) print_arelt_descr (abfd, true);
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if (dump_file_header) {
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char *comma = "";
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printf("architecture: %s, ",
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bfd_printable_arch_mach (bfd_get_architecture (abfd),
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bfd_get_machine (abfd)));
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printf("flags 0x%08x:\n", abfd->flags);
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#define PF(x, y) if (abfd->flags & x) {printf("%s%s", comma, y); comma=", ";}
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PF(HAS_RELOC, "HAS_RELOC");
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PF(EXEC_P, "EXEC_P");
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PF(HAS_LINENO, "HAS_LINENO");
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PF(HAS_DEBUG, "HAS_DEBUG");
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PF(HAS_SYMS, "HAS_SYMS");
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PF(HAS_LOCALS, "HAS_LOCALS");
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PF(DYNAMIC, "DYNAMIC");
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PF(WP_TEXT, "WP_TEXT");
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PF(D_PAGED, "D_PAGED");
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printf("\nstart address 0x%08lx", abfd->start_address);
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}
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printf("\n");
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if (dump_section_headers)
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dump_headers(abfd);
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if (dump_symtab || dump_reloc_info || disassemble) {
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syms = slurp_symtab(abfd);
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}
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if (dump_symtab) dump_symbols (abfd);
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if (dump_reloc_info) dump_relocs(abfd);
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if (dump_section_contents) dump_data (abfd);
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if (disassemble) disassemble_data(abfd);
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}
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void
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display_file (filename, target)
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char *filename;
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char *target;
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{
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bfd *file, *arfile = (bfd *) NULL;
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file = bfd_openr (filename, target);
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if (file == NULL) {
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bfd_perror (filename);
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return;
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}
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if (bfd_check_format (file, bfd_archive) == true) {
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printf ("In archive %s:\n", bfd_get_filename (file));
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for(;;) {
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bfd_error = no_error;
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arfile = bfd_openr_next_archived_file (file, arfile);
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if (arfile == NULL) {
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if (bfd_error != no_more_archived_files)
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bfd_perror (bfd_get_filename(file));
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return;
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}
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display_bfd (arfile);
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/* Don't close the archive elements; we need them for next_archive */
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}
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}
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else
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display_bfd(file);
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bfd_close(file);
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}
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/* Actually display the various requested regions */
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void
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dump_data (abfd)
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bfd *abfd;
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{
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asection *section;
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bfd_byte *data ;
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unsigned int datasize = 0;
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size_t i;
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for (section = abfd->sections; section != NULL; section =
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section->next) {
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int onaline = 16;
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if (only == (char *)NULL ||
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strcmp(only,section->name) == 0){
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printf("Contents of section %s:\n", section->name);
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if (section->size == 0) continue;
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data = (bfd_byte *)malloc(section->size);
|
||
if (data == (bfd_byte *)NULL) {
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fprintf (stderr, "%s: memory exhausted.\n", program_name);
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exit (1);
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||
}
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datasize = section->size;
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||
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||
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bfd_get_section_contents (abfd, section, data, 0, section->size);
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|
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for (i= 0; i < section->size; i += onaline) {
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size_t j;
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printf(" %04lx ", i + section->vma);
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for (j = i; j < i+ onaline; j++) {
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if (j < section->size)
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printf("%02x", (unsigned)(data[j]));
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else
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printf(" ");
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if ((j & 3 ) == 3) printf(" ");
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||
}
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||
|
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printf(" ");
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for (j = i; j < i+onaline ; j++) {
|
||
if (j >= section->size)
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||
printf(" ");
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||
else
|
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printf("%c", isprint(data[j]) ?data[j] : '.');
|
||
}
|
||
putchar ('\n');
|
||
}
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||
}
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||
|
||
free (data);
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* Should perhaps share code and display with nm? */
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||
void
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||
dump_symbols (abfd)
|
||
bfd *abfd;
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||
{
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||
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||
unsigned int count;
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||
asymbol **current = syms;
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||
printf("SYMBOL TABLE:\n");
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||
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||
for (count = 0; count < symcount; count++) {
|
||
if ((*current)->the_bfd) {
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||
bfd_print_symbol((*current)->the_bfd,
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||
stdout,
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||
*current, bfd_print_symbol_all_enum);
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||
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printf("\n");
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}
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current++;
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||
}
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printf("\n");
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||
printf("\n");
|
||
}
|
||
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|
||
void
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||
dump_relocs(abfd)
|
||
bfd *abfd;
|
||
{
|
||
arelent **relpp;
|
||
unsigned int relcount;
|
||
asection *a;
|
||
for (a = abfd->sections; a != (asection *)NULL; a = a->next) {
|
||
printf("RELOCATION RECORDS FOR [%s]:",a->name);
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||
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||
if (get_reloc_upper_bound(abfd, a) == 0) {
|
||
printf(" (none)\n\n");
|
||
}
|
||
else {
|
||
arelent **p;
|
||
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||
relpp = (arelent **) xmalloc( get_reloc_upper_bound(abfd,a) );
|
||
relcount = bfd_canonicalize_reloc(abfd,a,relpp, syms);
|
||
if (relcount == 0) {
|
||
printf(" (none)\n\n");
|
||
}
|
||
else {
|
||
printf("\n");
|
||
printf("OFFSET TYPE VALUE \n");
|
||
|
||
for (p =relpp; *p != (arelent *)NULL; p++) {
|
||
arelent *q = *p;
|
||
CONST char *sym_name;
|
||
CONST char *section_name = q->section == (asection *)NULL ? "*abs" :
|
||
q->section->name;
|
||
if (q->sym_ptr_ptr && *q->sym_ptr_ptr) {
|
||
sym_name = (*(q->sym_ptr_ptr))->name ;
|
||
}
|
||
else {
|
||
sym_name = 0;
|
||
}
|
||
if (sym_name) {
|
||
printf("%08lx %-8s %s",
|
||
q->address,
|
||
q->howto->name,
|
||
sym_name);
|
||
}
|
||
else {
|
||
printf("%08lx %-8s [%s]",
|
||
q->address,
|
||
q->howto->name,
|
||
section_name);
|
||
}
|
||
if (q->addend) {
|
||
printf("+0x%lx(%ld)", q->addend, (long) q->addend);
|
||
}
|
||
printf("\n");
|
||
}
|
||
printf("\n\n");
|
||
free(relpp);
|
||
}
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
static void
|
||
DEFUN_VOID(display_info)
|
||
{
|
||
unsigned int i;
|
||
extern bfd_target *target_vector[];
|
||
|
||
enum bfd_architecture j;
|
||
i = 0;
|
||
printf("BFD header file version %s\n", BFD_VERSION);
|
||
while (target_vector[i] != (bfd_target *)NULL)
|
||
{
|
||
bfd_target *p = target_vector[i];
|
||
bfd *abfd = bfd_openw("##dummy",p->name);
|
||
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" );
|
||
{
|
||
enum bfd_architecture j;
|
||
for (j = bfd_arch_obscure +1; j < bfd_arch_last; j++)
|
||
{
|
||
if (bfd_set_arch_mach(abfd, j, 0))
|
||
{
|
||
printf(" %s\n", bfd_printable_arch_mach(j,0));
|
||
}
|
||
}
|
||
|
||
}
|
||
i++;
|
||
}
|
||
/* Again as a table */
|
||
printf("%12s"," ");
|
||
for (i = 0; target_vector[i]; i++) {
|
||
printf("%s ",target_vector[i]->name);
|
||
}
|
||
printf("\n");
|
||
for (j = bfd_arch_obscure +1; j < bfd_arch_last; j++) {
|
||
printf("%11s ", bfd_printable_arch_mach(j,0));
|
||
for (i = 0; target_vector[i]; i++) {
|
||
{
|
||
bfd_target *p = target_vector[i];
|
||
bfd *abfd = bfd_openw("##dummy",p->name);
|
||
int l = strlen(p->name);
|
||
int ok = bfd_set_arch_mach(abfd, j, 0);
|
||
if (ok) {
|
||
printf("%s ", p->name);
|
||
}
|
||
else {
|
||
while (l--) {
|
||
printf("%c",ok?'*':'-');
|
||
}
|
||
printf(" ");
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
printf("\n");
|
||
}
|
||
}
|
||
/** main and like trivia */
|
||
int
|
||
main (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
int c;
|
||
extern int optind;
|
||
extern char *optarg;
|
||
char *target = default_target;
|
||
boolean seenflag = false;
|
||
int ind = 0;
|
||
|
||
program_name = *argv;
|
||
|
||
while ((c = getopt_long (argc, argv, "ib:m:dlfahrtxsj:", long_options, &ind))
|
||
!= EOF) {
|
||
seenflag = true;
|
||
switch (c) {
|
||
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':
|
||
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 0 : break; /* we've been given a long option */
|
||
case 't': dump_symtab = 1; break;
|
||
case 'd': disassemble = true ; break;
|
||
case 's': dump_section_contents = 1; break;
|
||
case 'r': dump_reloc_info = 1; break;
|
||
case 'a': dump_ar_hdrs = 1; break;
|
||
case 'h': dump_section_headers = 1; break;
|
||
default:
|
||
usage ();
|
||
}
|
||
}
|
||
|
||
if (seenflag == false)
|
||
usage ();
|
||
|
||
if (info) {
|
||
display_info();
|
||
}
|
||
else {
|
||
if (optind == argc)
|
||
display_file ("a.out", target);
|
||
else
|
||
for (; optind < argc;)
|
||
display_file (argv[optind++], target);
|
||
}
|
||
return 0;
|
||
}
|