2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1988, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)strip.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.bin/strip/strip.c,v 1.12 1999/08/28 01:05:53 peter Exp $
36 * $DragonFly: src/usr.bin/strip/Attic/strip.c,v 1.3 2003/10/04 20:36:51 hmp Exp $
39 #include <sys/types.h>
53 typedef struct exec EXEC;
54 typedef struct nlist NLIST;
56 #define strx n_un.n_strx
58 void s_stab(const char *, int, EXEC *);
59 void s_sym(const char *, int, EXEC *);
60 static void usage(void);
66 main(int argc, char **argv)
70 void (*sfcn)__P((const char *, int, EXEC *));
75 while ((ch = getopt(argc, argv, "dx")) != -1)
90 while ((fn = *argv++) != NULL) {
91 if ((fd = open(fn, O_RDWR)) < 0 ||
92 (nb = read(fd, &head, sizeof(EXEC))) == -1) {
95 if (fd >= 0 && close(fd)) {
101 if (nb != sizeof(EXEC) || N_BADMAG(head)) {
102 warnx("%s: %s", fn, strerror(EFTYPE));
120 s_sym(const char *fn, int fd, register EXEC *ep)
122 register off_t fsize;
124 /* If no symbols or data/text relocation info, quit. */
125 if (!ep->a_syms && !ep->a_trsize && !ep->a_drsize)
129 * New file size is the header plus text and data segments.
131 fsize = N_DATOFF(*ep) + ep->a_data;
133 /* Set symbol size and relocation info values to 0. */
134 ep->a_syms = ep->a_trsize = ep->a_drsize = 0;
136 /* Rewrite the header and truncate the file. */
137 if (lseek(fd, (off_t)0, SEEK_SET) == -1 ||
138 write(fd, ep, sizeof(EXEC)) != sizeof(EXEC) ||
139 ftruncate(fd, fsize)) {
146 s_stab(const char *fn, int fd, EXEC *ep)
148 register int cnt, len;
149 register char *nstr, *nstrbase, *p, *strbase;
150 register NLIST *sym, *nsym;
154 /* Quit if no symbols. */
159 if (fstat(fd, &sb) < 0) {
166 if (sb.st_size > SIZE_T_MAX) {
167 warnx("%s: %s", fn, strerror(EFBIG));
173 if ((ep = (EXEC *)mmap(NULL, (size_t)sb.st_size,
174 PROT_READ | PROT_WRITE, MAP_SHARED, fd, (off_t)0)) == (EXEC *)MAP_FAILED) {
181 * Initialize old and new symbol pointers. They both point to the
182 * beginning of the symbol table in memory, since we're deleting
185 sym = nsym = symbase = (NLIST *)((char *)ep + N_SYMOFF(*ep));
188 * Allocate space for the new string table, initialize old and
189 * new string pointers. Handle the extra long at the beginning
190 * of the string table.
192 strbase = (char *)ep + N_STROFF(*ep);
193 if ((nstrbase = malloc((size_t)*(u_long *)strbase)) == NULL) {
196 munmap((caddr_t)ep, sb.st_size);
199 nstr = nstrbase + sizeof(u_long);
202 * Read through the symbol table. For each non-debugging symbol,
203 * copy it and save its string in the new string table. Keep
204 * track of the number of symbols.
206 for (cnt = ep->a_syms / sizeof(NLIST); cnt--; ++sym)
207 if (!(sym->n_type & N_STAB) && sym->strx) {
209 nsym->strx = nstr - nstrbase;
210 p = strbase + sym->strx;
212 (!(sym->n_type & N_EXT) ||
213 (sym->n_type & ~N_EXT) == N_FN ||
214 strcmp(p, "gcc_compiled.") == 0 ||
215 strcmp(p, "gcc2_compiled.") == 0 ||
216 strcmp(p, "___gnu_compiled_c") == 0))
224 /* Fill in new symbol table size. */
225 ep->a_syms = (nsym - symbase) * sizeof(NLIST);
227 /* Fill in the new size of the string table. */
228 *(u_long *)nstrbase = len = nstr - nstrbase;
231 * Copy the new string table into place. Nsym should be pointing
232 * at the address past the last symbol entry.
234 bcopy(nstrbase, (void *)nsym, len);
236 /* Truncate to the current length. */
237 if (ftruncate(fd, (char *)nsym + len - (char *)ep)) {
241 munmap((caddr_t)ep, (size_t)sb.st_size);
247 (void)fprintf(stderr, "usage: strip [-dx] file ...\n");