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* objcopy.c (copy_object): Copy all applicable file flags.
(copy_file): Don't copy EXEC_P specially here. This permits strip to generate an executable file on UnixWare; it still does not actually strip the debugging information.
This commit is contained in:
Ian Lance Taylor
parent
8d8c5f398a
commit
c0367ba580
@ -1,3 +1,8 @@
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Thu Sep 23 01:05:06 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
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* objcopy.c (copy_object): Copy all applicable file flags.
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(copy_file): Don't copy EXEC_P specially here.
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Mon Sep 20 19:28:57 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
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* nlmconv.c (main): Adjust data section size to correspond to bss
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706
binutils/objcopy.c
Normal file
706
binutils/objcopy.c
Normal file
@ -0,0 +1,706 @@
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/* objcopy.c -- copy object file from input to output, optionally massaging it.
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Copyright (C) 1991 Free Software Foundation, Inc.
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This file is part of GNU Binutils.
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bucomm.h"
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#include <getopt.h>
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asymbol **isympp = NULL; /* Input symbols */
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asymbol **osympp = NULL; /* Output symbols that survive stripping */
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char *input_target = NULL;
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char *output_target = NULL;
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char *input_filename = NULL;
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char *output_filename = NULL;
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static void setup_sections();
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static void copy_sections();
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static boolean verbose;
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/* This flag distinguishes between strip and objcopy:
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1 means this is 'strip'; 0 means this is 'objcopy'.
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-1 means if we should use argv[0] to decide. */
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extern int is_strip;
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int show_version = 0;
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enum strip_action
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{
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strip_undef,
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strip_none, /* don't strip */
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strip_debug, /* strip all debugger symbols */
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strip_all /* strip all symbols */
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};
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/* Which symbols to remove. */
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enum strip_action strip_symbols;
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enum locals_action
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{
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locals_undef,
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locals_start_L, /* discard locals starting with L */
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locals_all /* discard all locals */
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};
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/* Which local symbols to remove. */
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enum locals_action discard_locals;
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/* Options to handle if running as "strip". */
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struct option strip_options[] = {
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{"strip-all", no_argument, 0, 's'},
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{"strip-debug", no_argument, 0, 'S'},
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{"discard-all", no_argument, 0, 'x'},
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{"discard-locals", no_argument, 0, 'X'},
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{"help", no_argument, 0, 'h'},
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{"input-format", required_argument, 0, 'I'},
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{"output-format", required_argument, 0, 'O'},
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{"format", required_argument, 0, 'F'},
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{"target", required_argument, 0, 'F'},
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{"version", no_argument, 0, 'V'},
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{"verbose", no_argument, 0, 'v'},
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{0, no_argument, 0, 0}
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};
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/* Options to handle if running as "objcopy". */
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struct option copy_options[] = {
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{"strip-all", no_argument, 0, 'S'},
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{"strip-debug", no_argument, 0, 'g'},
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{"discard-all", no_argument, 0, 'x'},
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{"discard-locals", no_argument, 0, 'X'},
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{"help", no_argument, 0, 'h'},
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{"input-format", required_argument, 0, 'I'},
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{"output-format", required_argument, 0, 'O'},
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{"format", required_argument, 0, 'F'},
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{"target", required_argument, 0, 'F'},
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{"version", no_argument, 0, 'V'},
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{"verbose", no_argument, 0, 'v'},
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{0, no_argument, 0, 0}
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};
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/* IMPORTS */
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extern char *program_name;
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extern char *program_version;
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static
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void
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copy_usage(stream, status)
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FILE *stream;
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int status;
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{
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fprintf(stream, "\
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Usage: %s [-vVSgxX] [-I format] [-O format] [-F format]\n\
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[--format=format] [--target=format] [--input-format=format]\n\
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[--output-format=format] [--strip-all] [--strip-debug]\n\
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[--discard-all] [--discard-locals] [--verbose] [--version]\n\
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[--help] in-file [out-file]\n", program_name);
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exit(status);
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}
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static
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void
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strip_usage(stream, status)
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FILE *stream;
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int status;
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{
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fprintf(stream, "\
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Usage: %s [-vVsSgxX] [-I format] [-O format] [-F format]\n\
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[--format=format] [--target=format] [--input-format=format]\n\
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[--output-format=format] [--strip-all] [--strip-debug] [--discard-all]\n\
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[--discard-locals] [--verbose] [--version] [--help] file...\n",
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program_name);
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exit(status);
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}
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/* Create a temp file in the same directory as supplied */
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static
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char *
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make_tempname(filename)
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char *filename;
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{
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static char template[] = "stXXXXXX";
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char *tmpname;
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char * slash = strrchr( filename, '/' );
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if (slash != (char *)NULL){
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*slash = 0;
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tmpname = xmalloc(strlen(filename) + sizeof(template) + 1 );
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strcpy(tmpname, filename);
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strcat(tmpname, "/" );
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strcat(tmpname, template);
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mktemp(tmpname );
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*slash = '/';
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} else {
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tmpname = xmalloc(sizeof(template));
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strcpy(tmpname, template);
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mktemp(tmpname);
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}
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return tmpname;
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}
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/*
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All the symbols have been read in and point to their owning input section.
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They have been relocated to that they are all relative to the base of
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their owning section. On the way out, all the symbols will be relocated to
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their new location in the output file, through some complex sums.
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*/
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static void
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mangle_sections(ibfd, obfd)
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bfd *ibfd;
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bfd *obfd;
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{
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asection *current = ibfd->sections;
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for (; current != NULL; current = current->next) {
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current->output_section = bfd_get_section_by_name(obfd, current->name);
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current->output_offset = 0;
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}
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}
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/* Choose which symbol entries to copy; put the result in osyms.
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We don't copy in place, because that confuses the relocs.
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Return the number of symbols to be printed. */
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static unsigned int
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filter_symbols (abfd, osyms, isyms, symcount)
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bfd *abfd;
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asymbol **osyms, **isyms;
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unsigned long symcount;
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{
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register asymbol **from = isyms, **to = osyms;
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unsigned int dst_count = 0;
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asymbol *sym;
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char locals_prefix = bfd_get_symbol_leading_char(abfd) == '_' ? 'L' : '.';
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unsigned int src_count = 0;
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for (; src_count <symcount; src_count++) {
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int keep = 0;
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flagword flags = (from[src_count])->flags;
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sym = from[src_count];
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if ((flags & BSF_GLOBAL) /* Keep if external */
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|| (sym->section == &bfd_und_section)
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|| (bfd_is_com_section (sym->section)))
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keep = 1;
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else if ((flags & BSF_DEBUGGING) != 0) /* debugging symbol */
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keep = strip_symbols != strip_debug;
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else /* local symbol */
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keep = (discard_locals != locals_all)
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&& !(discard_locals == locals_start_L &&
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sym->name[0] == locals_prefix);
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if (keep) {
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to[dst_count++] = from[src_count];
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}
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}
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return dst_count;
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}
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static void
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copy_object(ibfd, obfd)
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bfd *ibfd;
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bfd *obfd;
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{
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unsigned int symcount;
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if (!bfd_set_format(obfd, bfd_get_format(ibfd)))
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bfd_fatal(output_filename);
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if (verbose)
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printf("copy from %s(%s) to %s(%s)\n",
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ibfd->filename, ibfd->xvec->name,
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obfd->filename, obfd->xvec->name);
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if (! bfd_set_start_address (obfd, bfd_get_start_address (ibfd))
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|| ! bfd_set_file_flags (obfd,
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(bfd_get_file_flags (ibfd)
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& bfd_applicable_file_flags (obfd))))
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bfd_fatal (bfd_get_filename (ibfd));
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/* Copy architecture of input file to output file */
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if (!bfd_set_arch_mach(obfd, bfd_get_arch(ibfd),
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bfd_get_mach(ibfd))) {
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fprintf(stderr, "Output file cannot represent architecture %s\n",
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bfd_printable_arch_mach(bfd_get_arch(ibfd),
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bfd_get_mach(ibfd)));
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}
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if (!bfd_set_format(obfd, bfd_get_format(ibfd)))
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{
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bfd_fatal(ibfd->filename);
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}
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if (isympp)
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free (isympp);
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if (osympp != isympp)
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free (osympp);
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if (strip_symbols == strip_all && discard_locals == locals_undef)
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{
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osympp = isympp = NULL;
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symcount = 0;
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}
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else
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{
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osympp = isympp = (asymbol **) xmalloc(get_symtab_upper_bound(ibfd));
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symcount = bfd_canonicalize_symtab(ibfd, isympp);
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if (strip_symbols == strip_debug || discard_locals != locals_undef)
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{
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osympp = (asymbol **) xmalloc(symcount * sizeof(asymbol*));
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symcount = filter_symbols (ibfd, osympp, isympp, symcount);
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}
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}
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bfd_set_symtab(obfd, osympp, symcount);
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/*
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bfd mandates that all output sections be created and sizes set before
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any output is done. Thus, we traverse all sections twice.
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*/
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bfd_map_over_sections(ibfd, setup_sections, (void *) obfd);
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bfd_map_over_sections(ibfd, copy_sections, (void *) obfd);
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mangle_sections(ibfd, obfd);
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}
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static
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char *
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cat(a,b,c)
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char *a;
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char *b;
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char *c;
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{
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int size = strlen(a) + strlen(b) + strlen(c);
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char *r = xmalloc(size+1);
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strcpy(r,a);
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strcat(r,b);
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strcat(r,c);
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return r;
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}
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static void
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copy_archive(ibfd, obfd)
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bfd *ibfd;
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bfd *obfd;
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{
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bfd **ptr = &obfd->archive_head;
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bfd *this_element;
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/* Read each archive element in turn from the input, copy the
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contents to a temp file, and keep the temp file handle */
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char *dir = cat("./#",make_tempname(""),"cd");
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/* Make a temp directory to hold the contents */
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mkdir(dir,0777);
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obfd->has_armap = ibfd->has_armap;
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this_element = bfd_openr_next_archived_file(ibfd, NULL);
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ibfd->archive_head = this_element;
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while (this_element != (bfd *)NULL) {
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/* Create an output file for this member */
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char *output_name = cat(dir, "/",this_element->filename);
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bfd *output_bfd = bfd_openw(output_name, output_target);
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if (!bfd_set_format(obfd, bfd_get_format(ibfd)))
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bfd_fatal(output_filename);
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if (output_bfd == (bfd *)NULL) {
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bfd_fatal(output_name);
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}
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if (bfd_check_format(this_element, bfd_object) == true) {
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copy_object(this_element, output_bfd);
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}
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bfd_close(output_bfd);
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/* Now open the newly output file and attatch to our list */
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output_bfd = bfd_openr(output_name, output_target);
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/* Mark it for deletion */
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*ptr = output_bfd;
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ptr = &output_bfd->next;
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this_element->next = bfd_openr_next_archived_file(ibfd, this_element);
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this_element = this_element->next;
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}
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*ptr = (bfd *)NULL;
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if (!bfd_close(obfd))
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bfd_fatal(output_filename);
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/* Now delete all the files that we opened.
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Construct their names again, unfortunately, but so what;
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we're about to exit anyway. */
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for (this_element = ibfd->archive_head;
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this_element != (bfd *)NULL;
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this_element = this_element->next)
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{
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unlink(cat(dir,"/",this_element->filename));
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}
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rmdir(dir);
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if (!bfd_close(ibfd))
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bfd_fatal(input_filename);
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}
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static
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void
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copy_file(input_filename, output_filename)
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char *input_filename;
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char *output_filename;
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{
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bfd *ibfd;
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/* To allow us to do "strip *" without dying on the first
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non-object file, failures are nonfatal. */
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ibfd = bfd_openr(input_filename, input_target);
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if (ibfd == NULL)
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{
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bfd_perror(input_filename);
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return;
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}
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|
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if (bfd_check_format(ibfd, bfd_object)) {
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bfd * obfd = bfd_openw(output_filename, output_target);
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if (obfd == NULL)
|
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{
|
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bfd_perror(output_filename);
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return;
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}
|
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|
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copy_object(ibfd, obfd);
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|
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if (!bfd_close(obfd))
|
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{
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bfd_perror(output_filename);
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return;
|
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}
|
||||
|
||||
if (!bfd_close(ibfd))
|
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{
|
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bfd_perror(input_filename);
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return;
|
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}
|
||||
}
|
||||
else if (bfd_check_format(ibfd, bfd_archive)) {
|
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bfd * obfd = bfd_openw(output_filename, output_target);
|
||||
if (obfd == NULL)
|
||||
{
|
||||
bfd_perror(output_filename);
|
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return;
|
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}
|
||||
copy_archive(ibfd, obfd);
|
||||
}
|
||||
else {
|
||||
/* Get the right error message. */
|
||||
(void) bfd_check_format (ibfd, bfd_object);
|
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bfd_perror (input_filename);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/** Actually do the work */
|
||||
static void
|
||||
setup_sections(ibfd, isection, obfd)
|
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bfd *ibfd;
|
||||
sec_ptr isection;
|
||||
bfd *obfd;
|
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{
|
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sec_ptr osection;
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char *err;
|
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|
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osection = bfd_get_section_by_name(obfd, bfd_section_name(ibfd, isection));
|
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if (osection == NULL) {
|
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osection = bfd_make_section(obfd, bfd_section_name(ibfd, isection));
|
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if (osection == NULL) {
|
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err = "making";
|
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goto loser;
|
||||
}
|
||||
}
|
||||
|
||||
if (!bfd_set_section_size(obfd,
|
||||
osection,
|
||||
bfd_section_size(ibfd, isection))) {
|
||||
err = "size";
|
||||
goto loser;
|
||||
}
|
||||
|
||||
if (bfd_set_section_vma(obfd,
|
||||
osection,
|
||||
bfd_section_vma(ibfd, isection))
|
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== false) {
|
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err = "vma";
|
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goto loser;
|
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} /* on error */
|
||||
|
||||
if (bfd_set_section_alignment(obfd,
|
||||
osection,
|
||||
bfd_section_alignment(ibfd, isection))
|
||||
== false) {
|
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err = "alignment";
|
||||
goto loser;
|
||||
} /* on error */
|
||||
|
||||
if (!bfd_set_section_flags(obfd, osection,
|
||||
bfd_get_section_flags(ibfd, isection))) {
|
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err = "flags";
|
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goto loser;
|
||||
}
|
||||
|
||||
/* All went well */
|
||||
return;
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|
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loser:
|
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fprintf(stderr, "%s: file \"%s\", section \"%s\": error in %s: %s\n",
|
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program_name,
|
||||
bfd_get_filename(ibfd), bfd_section_name(ibfd, isection),
|
||||
err, bfd_errmsg(bfd_error));
|
||||
exit(1);
|
||||
} /* setup_sections() */
|
||||
|
||||
/*
|
||||
Copy all the section related data from an input section
|
||||
to an output section
|
||||
|
||||
If stripping then don't copy any relocation info
|
||||
*/
|
||||
static void
|
||||
copy_sections(ibfd, isection, obfd)
|
||||
bfd *ibfd;
|
||||
sec_ptr isection;
|
||||
bfd *obfd;
|
||||
{
|
||||
|
||||
arelent **relpp;
|
||||
int relcount;
|
||||
sec_ptr osection;
|
||||
bfd_size_type size;
|
||||
osection = bfd_get_section_by_name(obfd,
|
||||
bfd_section_name(ibfd, isection));
|
||||
|
||||
size = bfd_get_section_size_before_reloc(isection);
|
||||
|
||||
if (size == 0)
|
||||
return;
|
||||
|
||||
if (strip_symbols == strip_all
|
||||
|| bfd_get_reloc_upper_bound(ibfd, isection) == 0)
|
||||
{
|
||||
bfd_set_reloc(obfd, osection, (arelent **)NULL, 0);
|
||||
}
|
||||
else
|
||||
{
|
||||
relpp = (arelent **) xmalloc(bfd_get_reloc_upper_bound(ibfd, isection));
|
||||
relcount = bfd_canonicalize_reloc(ibfd, isection, relpp, isympp);
|
||||
bfd_set_reloc(obfd, osection, relpp, relcount);
|
||||
}
|
||||
|
||||
isection->_cooked_size = isection->_raw_size;
|
||||
isection->reloc_done =true;
|
||||
|
||||
|
||||
if (bfd_get_section_flags(ibfd, isection) & SEC_HAS_CONTENTS)
|
||||
{
|
||||
PTR memhunk = (PTR) xmalloc((unsigned)size);
|
||||
|
||||
if (!bfd_get_section_contents(ibfd, isection, memhunk, (file_ptr) 0, size))
|
||||
bfd_fatal(bfd_get_filename(ibfd));
|
||||
|
||||
if (!bfd_set_section_contents(obfd, osection, memhunk, (file_ptr)0, size))
|
||||
bfd_fatal(bfd_get_filename(obfd));
|
||||
free(memhunk);
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
int
|
||||
main(argc, argv)
|
||||
int argc;
|
||||
char *argv[];
|
||||
{
|
||||
int i;
|
||||
int c; /* sez which option char */
|
||||
|
||||
program_name = argv[0];
|
||||
|
||||
strip_symbols = strip_undef; /* default is to strip everything. */
|
||||
discard_locals = locals_undef;
|
||||
|
||||
bfd_init();
|
||||
|
||||
if (is_strip < 0) {
|
||||
i = strlen (program_name);
|
||||
is_strip = (i >= 5 && strcmp(program_name+i-5,"strip"));
|
||||
}
|
||||
|
||||
if (is_strip) {
|
||||
|
||||
while ((c = getopt_long(argc, argv, "I:O:F:sSgxXVv",
|
||||
strip_options, (int *) 0))
|
||||
!= EOF) {
|
||||
switch (c) {
|
||||
case 'I':
|
||||
input_target = optarg;
|
||||
case 'O':
|
||||
output_target = optarg;
|
||||
break;
|
||||
case 'F':
|
||||
input_target = output_target = optarg;
|
||||
break;
|
||||
|
||||
case 's':
|
||||
strip_symbols = strip_all;
|
||||
break;
|
||||
case 'S':
|
||||
case 'g':
|
||||
strip_symbols = strip_debug;
|
||||
break;
|
||||
case 'x':
|
||||
discard_locals = locals_all;
|
||||
break;
|
||||
case 'X':
|
||||
discard_locals = locals_start_L;
|
||||
break;
|
||||
case 'v':
|
||||
verbose = true;
|
||||
break;
|
||||
case 'V':
|
||||
show_version = true;
|
||||
break;
|
||||
case 0:
|
||||
break; /* we've been given a long option */
|
||||
case 'h':
|
||||
strip_usage (stdout, 0);
|
||||
default:
|
||||
strip_usage (stderr, 1);
|
||||
}
|
||||
}
|
||||
|
||||
i = optind;
|
||||
|
||||
/* Default is to strip all symbols. */
|
||||
if (strip_symbols == strip_undef && discard_locals == locals_undef)
|
||||
strip_symbols = strip_all;
|
||||
|
||||
if (output_target == (char *) NULL)
|
||||
output_target = input_target;
|
||||
|
||||
if (show_version) {
|
||||
printf ("GNU %s version %s\n", program_name, program_version);
|
||||
exit (0);
|
||||
}
|
||||
else if (i == argc)
|
||||
strip_usage(stderr, 1);
|
||||
for ( ; i < argc; i++) {
|
||||
char *tmpname = make_tempname(argv[i]);
|
||||
copy_file(argv[i], tmpname);
|
||||
rename(tmpname, argv[i]);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Invoked as "objcopy", not "strip" */
|
||||
|
||||
while ((c = getopt_long(argc, argv, "I:s:O:d:F:b:SgxXVv",
|
||||
strip_options, (int *) 0))
|
||||
!= EOF) {
|
||||
switch (c) {
|
||||
case 'I':
|
||||
case 's': /* "source" - 'I' is preferred */
|
||||
input_target = optarg;
|
||||
case 'O':
|
||||
case 'd': /* "destination" - 'O' is preferred */
|
||||
output_target = optarg;
|
||||
break;
|
||||
case 'F':
|
||||
case 'b': /* "both" - 'F' is preferred */
|
||||
input_target = output_target = optarg;
|
||||
break;
|
||||
|
||||
case 'S':
|
||||
strip_symbols = strip_all;
|
||||
break;
|
||||
case 'g':
|
||||
strip_symbols = strip_debug;
|
||||
break;
|
||||
case 'x':
|
||||
discard_locals = locals_all;
|
||||
break;
|
||||
case 'X':
|
||||
discard_locals = locals_start_L;
|
||||
break;
|
||||
case 'v':
|
||||
verbose = true;
|
||||
break;
|
||||
case 'V':
|
||||
show_version = true;
|
||||
break;
|
||||
case 0:
|
||||
break; /* we've been given a long option */
|
||||
case 'h':
|
||||
copy_usage (stdout, 0);
|
||||
default:
|
||||
copy_usage (stderr, 1);
|
||||
}
|
||||
}
|
||||
|
||||
if (show_version) {
|
||||
printf ("GNU %s version %s\n", program_name, program_version);
|
||||
exit (0);
|
||||
}
|
||||
|
||||
if (optind == argc)
|
||||
copy_usage(stderr, 1);
|
||||
|
||||
input_filename = argv[optind];
|
||||
if (optind + 1 < argc)
|
||||
output_filename = argv[optind+1];
|
||||
|
||||
/* Default is to strip no symbols. */
|
||||
if (strip_symbols == strip_undef && discard_locals == locals_undef)
|
||||
strip_symbols = strip_none;
|
||||
|
||||
if (input_filename == (char *) NULL)
|
||||
copy_usage(stderr, 1);
|
||||
|
||||
if (output_target == (char *) NULL)
|
||||
output_target = input_target;
|
||||
|
||||
/* If there is no destination file then create a temp and rename
|
||||
the result into the input */
|
||||
|
||||
if (output_filename == (char *)NULL) {
|
||||
char * tmpname = make_tempname(input_filename);
|
||||
copy_file(input_filename, tmpname);
|
||||
output_filename = input_filename;
|
||||
rename(tmpname, input_filename);
|
||||
}
|
||||
else {
|
||||
copy_file(input_filename, output_filename);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user