267 lines
6.6 KiB
C
267 lines
6.6 KiB
C
/*
|
|
* Copyright (c) 1988, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char copyright[] =
|
|
"@(#) Copyright (c) 1988, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)strip.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <a.out.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
typedef struct exec EXEC;
|
|
typedef struct nlist NLIST;
|
|
|
|
#define strx n_un.n_strx
|
|
|
|
void s_stab __P((const char *, int, EXEC *));
|
|
void s_sym __P((const char *, int, EXEC *));
|
|
static void usage __P((void));
|
|
|
|
int xflag = 0;
|
|
int err_val = 0;
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
register int fd, nb;
|
|
EXEC head;
|
|
void (*sfcn)__P((const char *, int, EXEC *));
|
|
int ch;
|
|
char *fn;
|
|
|
|
sfcn = s_sym;
|
|
while ((ch = getopt(argc, argv, "dx")) != -1)
|
|
switch(ch) {
|
|
case 'x':
|
|
xflag = 1;
|
|
/*FALLTHROUGH*/
|
|
case 'd':
|
|
sfcn = s_stab;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
while ((fn = *argv++) != NULL) {
|
|
if ((fd = open(fn, O_RDWR)) < 0 ||
|
|
(nb = read(fd, &head, sizeof(EXEC))) == -1) {
|
|
warn("%s", fn);
|
|
err_val = 1;
|
|
if (fd >= 0 && close(fd)) {
|
|
warn("%s", fn);
|
|
err_val = 1;
|
|
}
|
|
continue;
|
|
}
|
|
if (nb != sizeof(EXEC) || N_BADMAG(head)) {
|
|
warnx("%s: %s", fn, strerror(EFTYPE));
|
|
err_val = 1;
|
|
if (close(fd)) {
|
|
warn("%s", fn);
|
|
err_val = 1;
|
|
}
|
|
continue;
|
|
}
|
|
sfcn(fn, fd, &head);
|
|
if (close(fd)) {
|
|
warn("%s", fn);
|
|
err_val = 1;
|
|
}
|
|
}
|
|
exit(err_val);
|
|
}
|
|
|
|
void
|
|
s_sym(fn, fd, ep)
|
|
const char *fn;
|
|
int fd;
|
|
register EXEC *ep;
|
|
{
|
|
register off_t fsize;
|
|
|
|
/* If no symbols or data/text relocation info, quit. */
|
|
if (!ep->a_syms && !ep->a_trsize && !ep->a_drsize)
|
|
return;
|
|
|
|
/*
|
|
* New file size is the header plus text and data segments.
|
|
*/
|
|
fsize = N_DATOFF(*ep) + ep->a_data;
|
|
|
|
/* Set symbol size and relocation info values to 0. */
|
|
ep->a_syms = ep->a_trsize = ep->a_drsize = 0;
|
|
|
|
/* Rewrite the header and truncate the file. */
|
|
if (lseek(fd, (off_t)0, SEEK_SET) == -1 ||
|
|
write(fd, ep, sizeof(EXEC)) != sizeof(EXEC) ||
|
|
ftruncate(fd, fsize)) {
|
|
warn("%s", fn);
|
|
err_val = 1;
|
|
}
|
|
}
|
|
|
|
void
|
|
s_stab(fn, fd, ep)
|
|
const char *fn;
|
|
int fd;
|
|
EXEC *ep;
|
|
{
|
|
register int cnt, len;
|
|
register char *nstr, *nstrbase, *p, *strbase;
|
|
register NLIST *sym, *nsym;
|
|
struct stat sb;
|
|
NLIST *symbase;
|
|
|
|
/* Quit if no symbols. */
|
|
if (ep->a_syms == 0)
|
|
return;
|
|
|
|
/* Stat the file. */
|
|
if (fstat(fd, &sb) < 0) {
|
|
warn("%s", fn);
|
|
err_val = 1;
|
|
return;
|
|
}
|
|
|
|
/* Check size. */
|
|
if (sb.st_size > SIZE_T_MAX) {
|
|
warnx("%s: %s", fn, strerror(EFBIG));
|
|
err_val = 1;
|
|
return;
|
|
}
|
|
|
|
/* Map the file. */
|
|
if ((ep = (EXEC *)mmap(NULL, (size_t)sb.st_size,
|
|
PROT_READ | PROT_WRITE, MAP_SHARED, fd, (off_t)0)) == (EXEC *)MAP_FAILED) {
|
|
warn("%s", fn);
|
|
err_val = 1;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Initialize old and new symbol pointers. They both point to the
|
|
* beginning of the symbol table in memory, since we're deleting
|
|
* entries.
|
|
*/
|
|
sym = nsym = symbase = (NLIST *)((char *)ep + N_SYMOFF(*ep));
|
|
|
|
/*
|
|
* Allocate space for the new string table, initialize old and
|
|
* new string pointers. Handle the extra long at the beginning
|
|
* of the string table.
|
|
*/
|
|
strbase = (char *)ep + N_STROFF(*ep);
|
|
if ((nstrbase = malloc((size_t)*(u_long *)strbase)) == NULL) {
|
|
warn(NULL);
|
|
err_val = 1;
|
|
munmap((caddr_t)ep, sb.st_size);
|
|
return;
|
|
}
|
|
nstr = nstrbase + sizeof(u_long);
|
|
|
|
/*
|
|
* Read through the symbol table. For each non-debugging symbol,
|
|
* copy it and save its string in the new string table. Keep
|
|
* track of the number of symbols.
|
|
*/
|
|
for (cnt = ep->a_syms / sizeof(NLIST); cnt--; ++sym)
|
|
if (!(sym->n_type & N_STAB) && sym->strx) {
|
|
*nsym = *sym;
|
|
nsym->strx = nstr - nstrbase;
|
|
p = strbase + sym->strx;
|
|
if (xflag &&
|
|
(!(sym->n_type & N_EXT) ||
|
|
(sym->n_type & ~N_EXT) == N_FN ||
|
|
strcmp(p, "gcc_compiled.") == 0 ||
|
|
strcmp(p, "gcc2_compiled.") == 0 ||
|
|
strcmp(p, "___gnu_compiled_c") == 0))
|
|
continue;
|
|
len = strlen(p) + 1;
|
|
bcopy(p, nstr, len);
|
|
nstr += len;
|
|
++nsym;
|
|
}
|
|
|
|
/* Fill in new symbol table size. */
|
|
ep->a_syms = (nsym - symbase) * sizeof(NLIST);
|
|
|
|
/* Fill in the new size of the string table. */
|
|
*(u_long *)nstrbase = len = nstr - nstrbase;
|
|
|
|
/*
|
|
* Copy the new string table into place. Nsym should be pointing
|
|
* at the address past the last symbol entry.
|
|
*/
|
|
bcopy(nstrbase, (void *)nsym, len);
|
|
|
|
/* Truncate to the current length. */
|
|
if (ftruncate(fd, (char *)nsym + len - (char *)ep)) {
|
|
warn("%s", fn);
|
|
err_val = 1;
|
|
}
|
|
munmap((caddr_t)ep, (size_t)sb.st_size);
|
|
}
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "usage: strip [-dx] file ...\n");
|
|
exit(1);
|
|
}
|