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
35 static const char copyright[] =
36 "@(#) Copyright (c) 1988, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)strip.c 8.1 (Berkeley) 6/6/93";
44 static const char rcsid[] =
48 #include <sys/types.h>
62 typedef struct exec EXEC;
63 typedef struct nlist NLIST;
65 #define strx n_un.n_strx
67 void s_stab __P((const char *, int, EXEC *));
68 void s_sym __P((const char *, int, EXEC *));
69 static void usage __P((void));
81 void (*sfcn)__P((const char *, int, EXEC *));
86 while ((ch = getopt(argc, argv, "dx")) != -1)
101 while ((fn = *argv++) != NULL) {
102 if ((fd = open(fn, O_RDWR)) < 0 ||
103 (nb = read(fd, &head, sizeof(EXEC))) == -1) {
106 if (fd >= 0 && close(fd)) {
112 if (nb != sizeof(EXEC) || N_BADMAG(head)) {
113 warnx("%s: %s", fn, strerror(EFTYPE));
136 register off_t fsize;
138 /* If no symbols or data/text relocation info, quit. */
139 if (!ep->a_syms && !ep->a_trsize && !ep->a_drsize)
143 * New file size is the header plus text and data segments.
145 fsize = N_DATOFF(*ep) + ep->a_data;
147 /* Set symbol size and relocation info values to 0. */
148 ep->a_syms = ep->a_trsize = ep->a_drsize = 0;
150 /* Rewrite the header and truncate the file. */
151 if (lseek(fd, (off_t)0, SEEK_SET) == -1 ||
152 write(fd, ep, sizeof(EXEC)) != sizeof(EXEC) ||
153 ftruncate(fd, fsize)) {
165 register int cnt, len;
166 register char *nstr, *nstrbase, *p, *strbase;
167 register NLIST *sym, *nsym;
171 /* Quit if no symbols. */
176 if (fstat(fd, &sb) < 0) {
183 if (sb.st_size > SIZE_T_MAX) {
184 warnx("%s: %s", fn, strerror(EFBIG));
190 if ((ep = (EXEC *)mmap(NULL, (size_t)sb.st_size,
191 PROT_READ | PROT_WRITE, MAP_SHARED, fd, (off_t)0)) == (EXEC *)MAP_FAILED) {
198 * Initialize old and new symbol pointers. They both point to the
199 * beginning of the symbol table in memory, since we're deleting
202 sym = nsym = symbase = (NLIST *)((char *)ep + N_SYMOFF(*ep));
205 * Allocate space for the new string table, initialize old and
206 * new string pointers. Handle the extra long at the beginning
207 * of the string table.
209 strbase = (char *)ep + N_STROFF(*ep);
210 if ((nstrbase = malloc((size_t)*(u_long *)strbase)) == NULL) {
213 munmap((caddr_t)ep, sb.st_size);
216 nstr = nstrbase + sizeof(u_long);
219 * Read through the symbol table. For each non-debugging symbol,
220 * copy it and save its string in the new string table. Keep
221 * track of the number of symbols.
223 for (cnt = ep->a_syms / sizeof(NLIST); cnt--; ++sym)
224 if (!(sym->n_type & N_STAB) && sym->strx) {
226 nsym->strx = nstr - nstrbase;
227 p = strbase + sym->strx;
229 (!(sym->n_type & N_EXT) ||
230 (sym->n_type & ~N_EXT) == N_FN ||
231 strcmp(p, "gcc_compiled.") == 0 ||
232 strcmp(p, "gcc2_compiled.") == 0 ||
233 strcmp(p, "___gnu_compiled_c") == 0))
241 /* Fill in new symbol table size. */
242 ep->a_syms = (nsym - symbase) * sizeof(NLIST);
244 /* Fill in the new size of the string table. */
245 *(u_long *)nstrbase = len = nstr - nstrbase;
248 * Copy the new string table into place. Nsym should be pointing
249 * at the address past the last symbol entry.
251 bcopy(nstrbase, (void *)nsym, len);
253 /* Truncate to the current length. */
254 if (ftruncate(fd, (char *)nsym + len - (char *)ep)) {
258 munmap((caddr_t)ep, (size_t)sb.st_size);
264 (void)fprintf(stderr, "usage: strip [-dx] file ...\n");