old-cross-binutils/binutils/copy.c
1991-03-26 22:05:50 +00:00

414 lines
9.6 KiB
C

/*** copy.c -- copy object file from input to output, optionally massaging it */
#include "sysdep.h"
#include "bfd.h"
asymbol **sympp;
char *input_target = NULL;
char *output_target = NULL;
char *input_filename = NULL;
char *output_filename = NULL;
static void setup_sections();
static void copy_sections();
static boolean strip;
static boolean verbose;
/* IMPORTS */
extern char *program_name;
extern char *xmalloc();
static
void
usage()
{
fprintf(stderr,
"Usage %s [-S][-s srcfmt] [-d dtfmt] [-b bothfmts] infile [outfile]\n",
program_name);
exit(1);
}
/* Create a temp file in the same directory as supplied */
static
char *
make_tempname(filename)
char *filename;
{
static char template[] = "stXXXXXX";
char *tmpname;
char * slash = strrchr( filename, '/' );
if (slash != (char *)NULL){
*slash = 0;
tmpname = xmalloc(strlen(filename) + sizeof(template) + 1 );
strcpy(tmpname, filename);
strcat(tmpname, "/" );
strcat(tmpname, template);
mktemp(tmpname );
*slash = '/';
} else {
tmpname = xmalloc(sizeof(template));
strcpy(tmpname, template);
mktemp(tmpname);
}
return tmpname;
}
/*
All the symbols have been read in and point to their owning input section.
They have been relocated to that they are all relative to the base of
their owning section. On the way out, all the symbols will be relocated to
their new location in the output file, through some complex sums.
*/
static void
mangle_sections(ibfd, obfd)
bfd *ibfd;
bfd *obfd;
{
asection *current = ibfd->sections;
for (; current != NULL; current = current->next) {
current->output_section = bfd_get_section_by_name(obfd, current->name);
current->output_offset = 0;
}
}
static
void
copy_object(ibfd, obfd)
bfd *ibfd;
bfd *obfd;
{
unsigned int symcount;
if (!bfd_set_format(obfd, bfd_get_format(ibfd)))
bfd_fatal(output_filename);
if (verbose)
printf("copy from %s(%s) to %s(%s)\n",
ibfd->filename, ibfd->xvec->name,
obfd->filename, obfd->xvec->name);
if ((bfd_set_start_address(obfd, bfd_get_start_address(ibfd)) == false) ||
(bfd_set_file_flags(obfd, (bfd_get_file_flags(ibfd) &
~(HAS_LINENO | HAS_DEBUG | HAS_SYMS | D_PAGED |
HAS_LOCALS))) == false) ||
bfd_set_start_address(obfd, bfd_get_start_address(ibfd)) == false)
bfd_fatal(bfd_get_filename(ibfd));
/* Copy architecture of input file to output file */
if (!bfd_set_arch_mach(obfd, bfd_get_architecture(ibfd),
bfd_get_machine(ibfd))) {
fprintf(stderr, "Output file cannot represent architecture %s\n",
bfd_printable_arch_mach(bfd_get_architecture(ibfd),
bfd_get_machine(ibfd)));
}
if (!bfd_set_format(obfd, bfd_get_format(ibfd)))
{
bfd_fatal(ibfd->filename);
}
sympp = (asymbol **) xmalloc(get_symtab_upper_bound(ibfd));
symcount = bfd_canonicalize_symtab(ibfd, sympp);
bfd_set_symtab(obfd, sympp, strip == true ? 0 : symcount);
/*
bfd mandates that all output sections be created and sizes set before
any output is done. Thus, we traverse all sections twice.
*/
bfd_map_over_sections(ibfd, setup_sections, (void *) obfd);
bfd_map_over_sections(ibfd, copy_sections, (void *) obfd);
mangle_sections(ibfd, obfd);
}
static
char *
cat(a,b,c)
char *a;
char *b;
char *c;
{
int size = strlen(a) + strlen(b) + strlen(c);
char *r = xmalloc(size+1);
strcpy(r,a);
strcat(r,b);
strcat(r,c);
return r;
}
static void
copy_archive(ibfd, obfd)
bfd *ibfd;
bfd *obfd;
{
bfd **ptr =&( obfd->archive_head);
bfd *this_element;
/* Read each archive element in turn from the input, copy the
contents to a temp file, and keep the temp file handle */
char *dir = cat("./",make_tempname(this_element->filename),"copy-dir");
/* Make a temp directory to hold the contents */
mkdir(dir,0777);
obfd->has_armap = ibfd->has_armap;
this_element = bfd_openr_next_archived_file(ibfd, NULL);
while (this_element != (bfd *)NULL) {
/* Create an output file for this member */
char *output_name = cat(dir, "/",this_element->filename);
bfd *output_bfd = bfd_openw(output_name, output_target);
if (!bfd_set_format(obfd, bfd_get_format(ibfd)))
bfd_fatal(output_filename);
if (output_bfd == (bfd *)NULL) {
bfd_fatal(output_name);
}
if (bfd_check_format(this_element, bfd_object) == true) {
copy_object(this_element, output_bfd);
}
bfd_close(output_bfd);
/* Now open the newly output file and attatch to our list */
output_bfd = bfd_openr(output_name, output_target);
/* Mark it for deletion */
*ptr = output_bfd;
ptr =&( output_bfd->next);
this_element = bfd_openr_next_archived_file(ibfd, this_element);
}
*ptr = (bfd *)NULL;
if (!bfd_close(obfd))
bfd_fatal(output_filename);
/* Now delete all the files that we opened
We can't use the names in the obfd list since they may have been
trampled by the archive output code
*/
for (this_element = ibfd->archive_head;
this_element != (bfd *)NULL;
this_element = this_element->next)
{
unlink(cat(dir,"/",this_element->filename));
}
unlink(dir);
if (!bfd_close(ibfd))
bfd_fatal(input_filename);
}
static
void
copy_file(input_filename, output_filename)
char *input_filename;
char *output_filename;
{
bfd *ibfd;
ibfd = bfd_openr(input_filename, input_target);
if (ibfd == NULL)
bfd_fatal(input_filename);
if (bfd_check_format(ibfd, bfd_object)) {
bfd * obfd = bfd_openw(output_filename, output_target);
if (obfd == NULL)
bfd_fatal(output_filename);
copy_object(ibfd, obfd);
if (!bfd_close(obfd))
bfd_fatal(output_filename);
if (!bfd_close(ibfd))
bfd_fatal(input_filename);
}
else if (bfd_check_format(ibfd, bfd_archive)) {
bfd * obfd = bfd_openw(output_filename, output_target);
if (obfd == NULL)
bfd_fatal(output_filename);
copy_archive(ibfd, obfd);
}
}
/** Actually do the work */
static void
setup_sections(ibfd, isection, obfd)
bfd *ibfd;
sec_ptr isection;
bfd *obfd;
{
sec_ptr osection;
char *err;
osection = bfd_make_section(obfd, bfd_section_name(ibfd, isection));
if (osection == NULL) {
err = "making";
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))
== false) {
err = "vma";
goto loser;
} /* on error */
if (bfd_set_section_alignment(obfd,
osection,
bfd_section_alignment(ibfd, isection))
== false) {
err = "alignment";
goto loser;
} /* on error */
if (!bfd_set_section_flags(obfd, osection,
bfd_get_section_flags(ibfd, isection))) {
err = "flags";
goto loser;
}
/* All went well */
return;
loser:
fprintf(stderr, "%s: file \"%s\", section \"%s\": error in %s: %s\n",
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;
unsigned long size;
osection = bfd_get_section_by_name(obfd,
bfd_section_name(ibfd, isection));
size = bfd_section_size(ibfd, isection);
if (size == 0)
return;
if (strip == true || get_reloc_upper_bound(ibfd, isection) == 0)
{
bfd_set_reloc(obfd, osection, (arelent **)NULL, 0);
}
else
{
relpp = (arelent **) xmalloc(get_reloc_upper_bound(ibfd, isection));
relcount = bfd_canonicalize_reloc(ibfd, isection, relpp, sympp);
bfd_set_reloc(obfd, osection, relpp, relcount);
}
if (bfd_get_section_flags(ibfd, isection) & SEC_HAS_CONTENTS)
{
unsigned char *memhunk = (unsigned char *) xmalloc(size);
if (!bfd_get_section_contents(ibfd, isection, memhunk, 0, size))
bfd_fatal(bfd_get_filename(ibfd));
if (!bfd_set_section_contents(obfd, osection, memhunk, 0, size))
bfd_fatal(bfd_get_filename(obfd));
free(memhunk);
}
}
int
main(argc, argv)
int argc;
char *argv[];
{
int i;
program_name = argv[0];
if (strcmp(program_name,"strip") == 0) {
strip = true;
}
for (i = 1; i < argc; i++)
{
if (argv[i][0] == '-') {
switch (argv[i][1]) {
case 'v':
verbose = true;
break;
case 'b':
i++;
input_target = output_target = argv[i];
break;
case 'S':
strip = true;
break;
case 's':
i++;
input_target = argv[i];
break;
case 'd':
i++;
output_target = argv[i];
break;
default:
usage();
}
}
else {
if (input_filename) {
output_filename = argv[i];
}
else {
input_filename = argv[i];
}
}
}
if (input_filename == (char *) NULL)
usage();
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 1;
}