415 lines
9.6 KiB
C
415 lines
9.6 KiB
C
/*** copy.c -- copy object file from input to output, optionally massaging it */
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#include "sysdep.h"
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#include "bfd.h"
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asymbol **sympp;
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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 strip;
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static boolean verbose;
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/* IMPORTS */
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extern char *program_name;
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extern char *xmalloc();
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static
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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 [-S][-s srcfmt] [-d dtfmt] [-b bothfmts] infile [outfile]\n",
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program_name);
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exit(1);
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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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static
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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)) == false) ||
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(bfd_set_file_flags(obfd, (bfd_get_file_flags(ibfd) &
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~(HAS_LINENO | HAS_DEBUG | HAS_SYMS | D_PAGED |
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HAS_LOCALS))) == false) ||
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bfd_set_start_address(obfd, bfd_get_start_address(ibfd)) == false)
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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_architecture(ibfd),
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bfd_get_machine(ibfd))) {
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fprintf(stderr, "Output file cannot represent architecture %s\n",
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bfd_printable_arch_mach(bfd_get_architecture(ibfd),
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bfd_get_machine(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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sympp = (asymbol **) xmalloc(get_symtab_upper_bound(ibfd));
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symcount = bfd_canonicalize_symtab(ibfd, sympp);
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bfd_set_symtab(obfd, sympp, strip == true ? 0 : 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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ibfd = bfd_openr(input_filename, input_target);
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if (ibfd == NULL)
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bfd_fatal(input_filename);
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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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bfd_fatal(output_filename);
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copy_object(ibfd, obfd);
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if (!bfd_close(obfd))
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bfd_fatal(output_filename);
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if (!bfd_close(ibfd))
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bfd_fatal(input_filename);
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}
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else if (bfd_check_format(ibfd, bfd_archive)) {
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bfd * obfd = bfd_openw(output_filename, output_target);
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if (obfd == NULL)
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bfd_fatal(output_filename);
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copy_archive(ibfd, obfd);
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}
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}
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/** Actually do the work */
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static void
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setup_sections(ibfd, isection, obfd)
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bfd *ibfd;
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sec_ptr isection;
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bfd *obfd;
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{
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sec_ptr osection;
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char *err;
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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;
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}
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if (!bfd_set_section_size(obfd,
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osection,
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bfd_section_size(ibfd, isection))) {
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err = "size";
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goto loser;
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}
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if (bfd_set_section_vma(obfd,
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osection,
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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 */
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if (bfd_set_section_alignment(obfd,
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osection,
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bfd_section_alignment(ibfd, isection))
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== false) {
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err = "alignment";
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goto loser;
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} /* on error */
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if (!bfd_set_section_flags(obfd, osection,
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bfd_get_section_flags(ibfd, isection))) {
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err = "flags";
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goto loser;
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}
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/* All went well */
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return;
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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,
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bfd_get_filename(ibfd), bfd_section_name(ibfd, isection),
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err, bfd_errmsg(bfd_error));
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exit(1);
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} /* setup_sections() */
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/*
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Copy all the section related data from an input section
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to an output section
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If stripping then don't copy any relocation info
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*/
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static void
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copy_sections(ibfd, isection, obfd)
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bfd *ibfd;
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sec_ptr isection;
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bfd *obfd;
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{
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arelent **relpp;
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int relcount;
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sec_ptr osection;
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unsigned long size;
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osection = bfd_get_section_by_name(obfd,
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bfd_section_name(ibfd, isection));
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size = bfd_section_size(ibfd, isection);
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if (size == 0)
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return;
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if (strip == true || get_reloc_upper_bound(ibfd, isection) == 0)
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{
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bfd_set_reloc(obfd, osection, (arelent **)NULL, 0);
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}
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else
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{
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relpp = (arelent **) xmalloc(get_reloc_upper_bound(ibfd, isection));
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relcount = bfd_canonicalize_reloc(ibfd, isection, relpp, sympp);
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bfd_set_reloc(obfd, osection, relpp, relcount);
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}
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if (bfd_get_section_flags(ibfd, isection) & SEC_HAS_CONTENTS)
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{
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unsigned char *memhunk = (unsigned char *) xmalloc(size);
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if (!bfd_get_section_contents(ibfd, isection, memhunk, 0, size))
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bfd_fatal(bfd_get_filename(ibfd));
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if (!bfd_set_section_contents(obfd, osection, memhunk, 0, size))
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bfd_fatal(bfd_get_filename(obfd));
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free(memhunk);
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}
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}
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int i;
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program_name = argv[0];
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if (strcmp(program_name,"strip") == 0) {
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strip = true;
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}
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for (i = 1; i < argc; i++)
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{
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if (argv[i][0] == '-') {
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switch (argv[i][1]) {
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case 'v':
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verbose = true;
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break;
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case 'b':
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i++;
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input_target = output_target = argv[i];
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break;
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case 'S':
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strip = true;
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break;
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case 's':
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i++;
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input_target = argv[i];
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break;
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case 'd':
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i++;
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output_target = argv[i];
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break;
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default:
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usage();
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}
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}
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else {
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if (input_filename) {
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output_filename = argv[i];
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}
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else {
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input_filename = argv[i];
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}
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}
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}
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if (input_filename == (char *) NULL)
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usage();
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if (output_target == (char *) NULL)
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output_target = input_target;
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/* If there is no destination file then create a temp and rename
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the result into the input */
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if (output_filename == (char *)NULL) {
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char * tmpname = make_tempname(input_filename);
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copy_file(input_filename, tmpname);
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output_filename = input_filename;
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rename(tmpname, input_filename);
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}
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else {
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copy_file(input_filename, output_filename);
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}
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return 1;
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}
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