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 1.5 2005/01/01 00:22:33 cpressey Exp $
39 #include <sys/types.h>
43 #include <netinet/in.h>
44 #include <arpa/inet.h>
56 typedef struct exec EXEC
;
57 typedef struct nlist NLIST
;
59 #define strx n_un.n_strx
61 void s_stab(const char *, int, EXEC
*);
62 void s_sym(const char *, int, EXEC
*);
63 static void usage(void);
69 main(int argc
, char **argv
)
73 void (*sfcn
)(const char *, int, EXEC
*);
78 while ((ch
= getopt(argc
, argv
, "dx")) != -1)
93 while ((fn
= *argv
++) != NULL
) {
94 if ((fd
= open(fn
, O_RDWR
)) < 0 ||
95 (nb
= read(fd
, &head
, sizeof(EXEC
))) == -1) {
98 if (fd
>= 0 && close(fd
)) {
104 if (nb
!= sizeof(EXEC
) || N_BADMAG(head
)) {
105 warnx("%s: %s", fn
, strerror(EFTYPE
));
123 s_sym(const char *fn
, int fd
, register EXEC
*ep
)
125 register off_t fsize
;
127 /* If no symbols or data/text relocation info, quit. */
128 if (!ep
->a_syms
&& !ep
->a_trsize
&& !ep
->a_drsize
)
132 * New file size is the header plus text and data segments.
134 fsize
= N_DATOFF(*ep
) + ep
->a_data
;
136 /* Set symbol size and relocation info values to 0. */
137 ep
->a_syms
= ep
->a_trsize
= ep
->a_drsize
= 0;
139 /* Rewrite the header and truncate the file. */
140 if (lseek(fd
, (off_t
)0, SEEK_SET
) == -1 ||
141 write(fd
, ep
, sizeof(EXEC
)) != sizeof(EXEC
) ||
142 ftruncate(fd
, fsize
)) {
149 s_stab(const char *fn
, int fd
, EXEC
*ep
)
151 register int cnt
, len
;
152 register char *nstr
, *nstrbase
, *p
, *strbase
;
153 register NLIST
*sym
, *nsym
;
157 /* Quit if no symbols. */
162 if (fstat(fd
, &sb
) < 0) {
169 if (sb
.st_size
> SIZE_T_MAX
) {
170 warnx("%s: %s", fn
, strerror(EFBIG
));
176 if ((ep
= (EXEC
*)mmap(NULL
, (size_t)sb
.st_size
,
177 PROT_READ
| PROT_WRITE
, MAP_SHARED
, fd
, (off_t
)0)) == (EXEC
*)MAP_FAILED
) {
184 * Initialize old and new symbol pointers. They both point to the
185 * beginning of the symbol table in memory, since we're deleting
188 sym
= nsym
= symbase
= (NLIST
*)((char *)ep
+ N_SYMOFF(*ep
));
191 * Allocate space for the new string table, initialize old and
192 * new string pointers. Handle the extra long at the beginning
193 * of the string table.
195 strbase
= (char *)ep
+ N_STROFF(*ep
);
196 if ((nstrbase
= malloc((size_t)*(u_long
*)strbase
)) == NULL
) {
199 munmap((caddr_t
)ep
, sb
.st_size
);
202 nstr
= nstrbase
+ sizeof(u_long
);
205 * Read through the symbol table. For each non-debugging symbol,
206 * copy it and save its string in the new string table. Keep
207 * track of the number of symbols.
209 for (cnt
= ep
->a_syms
/ sizeof(NLIST
); cnt
--; ++sym
)
210 if (!(sym
->n_type
& N_STAB
) && sym
->strx
) {
212 nsym
->strx
= nstr
- nstrbase
;
213 p
= strbase
+ sym
->strx
;
215 (!(sym
->n_type
& N_EXT
) ||
216 (sym
->n_type
& ~N_EXT
) == N_FN
||
217 strcmp(p
, "gcc_compiled.") == 0 ||
218 strcmp(p
, "gcc2_compiled.") == 0 ||
219 strcmp(p
, "___gnu_compiled_c") == 0))
227 /* Fill in new symbol table size. */
228 ep
->a_syms
= (nsym
- symbase
) * sizeof(NLIST
);
230 /* Fill in the new size of the string table. */
231 *(u_long
*)nstrbase
= len
= nstr
- nstrbase
;
234 * Copy the new string table into place. Nsym should be pointing
235 * at the address past the last symbol entry.
237 bcopy(nstrbase
, (void *)nsym
, len
);
239 /* Truncate to the current length. */
240 if (ftruncate(fd
, (char *)nsym
+ len
- (char *)ep
)) {
244 munmap((caddr_t
)ep
, (size_t)sb
.st_size
);
250 (void)fprintf(stderr
, "usage: strip [-dx] file ...\n");