Annotation of src/usr.bin/size/size.c, Revision 1.4
1.4 ! deraadt 1: /* $OpenBSD: size.c,v 1.3 1996/06/26 05:39:18 deraadt Exp $ */
1.2 deraadt 2: /* $NetBSD: size.c,v 1.7 1996/01/14 23:07:12 pk Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1988, 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)size.c 8.2 (Berkeley) 12/9/93";
46: #endif
1.4 ! deraadt 47: static char rcsid[] = "$OpenBSD: size.c,v 1.3 1996/06/26 05:39:18 deraadt Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/param.h>
51: #include <sys/file.h>
52: #include <a.out.h>
1.2 deraadt 53: #include <ar.h>
54: #include <ranlib.h>
1.1 deraadt 55: #include <unistd.h>
56: #include <stdlib.h>
57: #include <stdio.h>
58: #include <err.h>
59:
1.2 deraadt 60: int ignore_bad_archive_entries = 1;
61:
62: int process_file __P((int, char *));
63: int show_archive __P((int, char *, FILE *));
64: int show_object __P((int, char *, FILE *));
65: void *emalloc __P((size_t));
66: void *erealloc __P((void *, size_t));
1.1 deraadt 67: void usage __P((void));
68:
69: int
70: main(argc, argv)
71: int argc;
72: char *argv[];
73: {
74: int ch, eval;
75:
1.2 deraadt 76: while ((ch = getopt(argc, argv, "w")) != EOF)
1.1 deraadt 77: switch(ch) {
1.2 deraadt 78: case 'w':
79: ignore_bad_archive_entries = 0;
80: break;
1.1 deraadt 81: case '?':
82: default:
83: usage();
84: }
85: argc -= optind;
86: argv += optind;
87:
88: eval = 0;
89: if (*argv)
90: do {
1.2 deraadt 91: eval |= process_file(argc, *argv);
1.1 deraadt 92: } while (*++argv);
93: else
1.2 deraadt 94: eval |= process_file(1, "a.out");
1.1 deraadt 95: exit(eval);
96: }
97:
1.2 deraadt 98: /*
99: * process_file()
100: * show symbols in the file given as an argument. Accepts archive and
101: * object files as input.
102: */
103: int
104: process_file(count, fname)
105: int count;
106: char *fname;
107: {
108: struct exec exec_head;
109: FILE *fp;
110: int retval;
111: char magic[SARMAG];
112:
113: if (!(fp = fopen(fname, "r"))) {
114: warnx("cannot read %s", fname);
115: return(1);
116: }
117:
118: /*
119: * first check whether this is an object file - read a object
120: * header, and skip back to the beginning
121: */
122: if (fread((char *)&exec_head, sizeof(exec_head), (size_t)1, fp) != 1) {
123: warnx("%s: bad format", fname);
124: (void)fclose(fp);
125: return(1);
126: }
127: rewind(fp);
128:
129: /* this could be an archive */
130: if (N_BADMAG(exec_head)) {
131: if (fread(magic, sizeof(magic), (size_t)1, fp) != 1 ||
132: strncmp(magic, ARMAG, SARMAG)) {
133: warnx("%s: not object file or archive", fname);
134: (void)fclose(fp);
135: return(1);
136: }
137: retval = show_archive(count, fname, fp);
138: } else
139: retval = show_objfile(count, fname, fp);
140: (void)fclose(fp);
141: return(retval);
142: }
143:
144: /*
145: * show_archive()
146: * show symbols in the given archive file
147: */
1.1 deraadt 148: int
1.2 deraadt 149: show_archive(count, fname, fp)
150: int count;
151: char *fname;
152: FILE *fp;
153: {
154: struct ar_hdr ar_head;
155: struct exec exec_head;
156: int i, rval;
157: long last_ar_off;
158: char *p, *name;
159: int baselen, namelen;
160:
161: baselen = strlen(fname) + 3;
162: namelen = sizeof(ar_head.ar_name);
163: name = emalloc(baselen + namelen);
164:
165: rval = 0;
166:
167: /* while there are more entries in the archive */
168: while (fread((char *)&ar_head, sizeof(ar_head), (size_t)1, fp) == 1) {
169: /* bad archive entry - stop processing this archive */
170: if (strncmp(ar_head.ar_fmag, ARFMAG, sizeof(ar_head.ar_fmag))) {
171: warnx("%s: bad format archive header", fname);
172: (void)free(name);
173: return(1);
174: }
175:
176: /* remember start position of current archive object */
177: last_ar_off = ftell(fp);
178:
179: /* skip ranlib entries */
180: if (!strncmp(ar_head.ar_name, RANLIBMAG, sizeof(RANLIBMAG) - 1))
181: goto skip;
182:
183: /*
184: * construct a name of the form "archive.a:obj.o:" for the
185: * current archive entry if the object name is to be printed
186: * on each output line
187: */
188: p = name;
189: if (count > 1)
190: p += sprintf(p, "%s:", fname);
191: #ifdef AR_EFMT1
192: /*
193: * BSD 4.4 extended AR format: #1/<namelen>, with name as the
194: * first <namelen> bytes of the file
195: */
196: if ( (ar_head.ar_name[0] == '#') &&
197: (ar_head.ar_name[1] == '1') &&
198: (ar_head.ar_name[2] == '/') &&
199: (isdigit(ar_head.ar_name[3]))) {
200:
201: int len = atoi(&ar_head.ar_name[3]);
202: if (len > namelen) {
203: p -= (long)name;
204: name = (char *)erealloc(name, baselen+len);
205: namelen = len;
206: p += (long)name;
207: }
208: if (fread(p, len, 1, fp) != 1) {
209: (void)fprintf(stderr,
210: "nm: %s: premature EOF.\n", name);
211: (void)free(name);
212: return 1;
213: }
214: p += len;
215: } else
216: #endif
217: for (i = 0; i < sizeof(ar_head.ar_name); ++i)
218: if (ar_head.ar_name[i] && ar_head.ar_name[i] != ' ')
219: *p++ = ar_head.ar_name[i];
220: *p++ = '\0';
221:
222: /* get and check current object's header */
223: if (fread((char *)&exec_head, sizeof(exec_head),
224: (size_t)1, fp) != 1) {
225: warnx("%s: premature EOF", name);
226: (void)free(name);
227: return(1);
228: }
229:
230: if (N_BADMAG(exec_head)) {
231: if (!ignore_bad_archive_entries) {
232: warnx("%s: bad format", name);
233: rval = 1;
234: }
1.4 ! deraadt 235: } else if (N_GETMID(exec_head) != MID_MACHINE) {
! 236: if (!ignore_bad_archive_entries) {
! 237: warnx("%s: wrong architecture", name);
! 238: rval = 1;
! 239: }
1.2 deraadt 240: } else {
241: (void)fseek(fp, (long)-sizeof(exec_head),
242: SEEK_CUR);
243: rval |= show_objfile(2, name, fp);
244: }
245:
246: /*
247: * skip to next archive object - it starts at the next
248: * even byte boundary
249: */
250: #define even(x) (((x) + 1) & ~1)
251: skip: if (fseek(fp, last_ar_off + even(atol(ar_head.ar_size)),
252: SEEK_SET)) {
253: warn("%s", fname);
254: (void)free(name);
255: return(1);
256: }
257: }
258: (void)free(name);
259: return(rval);
260: }
261:
262: int
263: show_objfile(count, name, fp)
1.1 deraadt 264: int count;
265: char *name;
1.2 deraadt 266: FILE *fp;
1.1 deraadt 267: {
268: static int first = 1;
269: struct exec head;
270: u_long total;
271:
1.2 deraadt 272: if (fread((char *)&head, sizeof(head), (size_t)1, fp) != 1) {
273: warnx("%s: cannot read header", name);
274: return(1);
275: }
276:
277: if (N_BADMAG(head)) {
278: warnx("%s: bad format", name);
1.4 ! deraadt 279: return(1);
! 280: }
! 281:
! 282: if (N_GETMID(head) != MID_MACHINE) {
! 283: warnx("%s: wrong architecture", name);
1.2 deraadt 284: return(1);
1.1 deraadt 285: }
286:
287: if (first) {
288: first = 0;
289: (void)printf("text\tdata\tbss\tdec\thex\n");
290: }
291: total = head.a_text + head.a_data + head.a_bss;
292: (void)printf("%lu\t%lu\t%lu\t%lu\t%lx", head.a_text, head.a_data,
293: head.a_bss, total, total);
294: if (count > 1)
295: (void)printf("\t%s", name);
296: (void)printf("\n");
297: return (0);
298: }
299:
1.2 deraadt 300: void *
301: emalloc(size)
302: size_t size;
303: {
304: char *p;
305:
306: /* NOSTRICT */
307: if (p = malloc(size))
308: return(p);
309: err(1, NULL);
310: }
311:
312: void *
313: erealloc(p, size)
314: void *p;
315: size_t size;
316: {
317: /* NOSTRICT */
318: if (p = realloc(p, size))
319: return(p);
320: err(1, NULL);
321: }
322:
1.1 deraadt 323: void
324: usage()
325: {
1.2 deraadt 326: (void)fprintf(stderr, "usage: size [-w] [file ...]\n");
1.1 deraadt 327: exit(1);
328: }
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