1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #pragma ident "%Z%%M% %I% %E% SMI"
27
28 /*
29 * Given a file containing sections with stabs data, convert the stabs data to
30 * CTF data, and replace the stabs sections with a CTF section.
31 */
32
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <unistd.h>
36 #include <signal.h>
37 #include <string.h>
38 #include <fcntl.h>
39 #include <libgen.h>
40 #include <errno.h>
41 #include <assert.h>
42
43 #include "ctftools.h"
44 #include "memory.h"
45
46 const char *progname;
47 int debug_level = DEBUG_LEVEL;
48
49 static char *infile = NULL;
50 static const char *outfile = NULL;
51 static int dynsym;
52
53 static void
usage(void)54 usage(void)
55 {
56 (void) fprintf(stderr,
57 "Usage: %s [-gis] -l label | -L labelenv [-o outfile] object_file\n"
58 "\n"
59 " Note: if -L labelenv is specified and labelenv is not set in\n"
60 " the environment, a default value is used.\n",
61 progname);
62 }
63
64 static void
terminate_cleanup(void)65 terminate_cleanup(void)
66 {
67 #if !defined(__FreeBSD__)
68 if (!outfile) {
69 fprintf(stderr, "Removing %s\n", infile);
70 unlink(infile);
71 }
72 #endif
73 }
74
75 static void
handle_sig(int sig)76 handle_sig(int sig)
77 {
78 terminate("Caught signal %d - exiting\n", sig);
79 }
80
81 static int
file_read(tdata_t * td,char * filename,int ignore_non_c)82 file_read(tdata_t *td, char *filename, int ignore_non_c)
83 {
84 typedef int (*reader_f)(tdata_t *, Elf *, char *);
85 static reader_f readers[] = {
86 dw_read,
87 NULL
88 };
89
90 source_types_t source_types;
91 Elf *elf;
92 int i, rc, fd;
93
94 if ((fd = open(filename, O_RDONLY)) < 0)
95 terminate("failed to open %s", filename);
96
97 (void) elf_version(EV_CURRENT);
98
99 if ((elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) {
100 close(fd);
101 terminate("failed to read %s: %s\n", filename,
102 elf_errmsg(-1));
103 }
104
105 source_types = built_source_types(elf, filename);
106
107 if ((source_types == SOURCE_NONE || (source_types & SOURCE_UNKNOWN)) &&
108 ignore_non_c) {
109 debug(1, "Ignoring file %s from unknown sources\n", filename);
110 exit(0);
111 }
112
113 for (i = 0; readers[i] != NULL; i++) {
114 if ((rc = readers[i](td, elf, filename)) == 0)
115 break;
116
117 assert(rc < 0 && errno == ENOENT);
118 }
119
120 if (readers[i] == NULL) {
121 /*
122 * None of the readers found compatible type data.
123 */
124
125 if (findelfsecidx(elf, filename, ".debug") >= 0) {
126 terminate("%s: DWARF version 1 is not supported\n",
127 filename);
128 }
129
130 if (!(source_types & SOURCE_C) && ignore_non_c) {
131 debug(1, "Ignoring file %s not built from C sources\n",
132 filename);
133 exit(0);
134 }
135
136 rc = 0;
137 } else {
138 rc = 1;
139 }
140
141 (void) elf_end(elf);
142 (void) close(fd);
143
144 return (rc);
145 }
146
147 int
main(int argc,char ** argv)148 main(int argc, char **argv)
149 {
150 tdata_t *filetd, *mstrtd;
151 const char *label = NULL;
152 int verbose = 0;
153 int ignore_non_c = 0;
154 int keep_stabs = 0;
155 int c;
156
157 #ifdef illumos
158 sighold(SIGINT);
159 sighold(SIGQUIT);
160 sighold(SIGTERM);
161 #endif
162
163 progname = basename(argv[0]);
164
165 if (getenv("CTFCONVERT_DEBUG_LEVEL"))
166 debug_level = atoi(getenv("CTFCONVERT_DEBUG_LEVEL"));
167
168 while ((c = getopt(argc, argv, ":l:L:o:givs")) != EOF) {
169 switch (c) {
170 case 'l':
171 label = optarg;
172 break;
173 case 'L':
174 if ((label = getenv(optarg)) == NULL)
175 label = CTF_DEFAULT_LABEL;
176 break;
177 case 'o':
178 outfile = optarg;
179 break;
180 case 's':
181 dynsym = CTF_USE_DYNSYM;
182 break;
183 case 'i':
184 ignore_non_c = 1;
185 break;
186 case 'g':
187 keep_stabs = CTF_KEEP_STABS;
188 break;
189 case 'v':
190 verbose = 1;
191 break;
192 default:
193 usage();
194 exit(2);
195 }
196 }
197
198 if (getenv("STRIPSTABS_KEEP_STABS") != NULL)
199 keep_stabs = CTF_KEEP_STABS;
200
201 if (argc - optind != 1 || label == NULL) {
202 usage();
203 exit(2);
204 }
205
206 infile = argv[optind];
207 if (access(infile, R_OK) != 0)
208 terminate("Can't access %s", infile);
209
210 /*
211 * Upon receipt of a signal, we want to clean up and exit. Our
212 * primary goal during cleanup is to restore the system to a state
213 * such that a subsequent make will eventually cause this command to
214 * be re-run. If we remove the input file (which we do if we get a
215 * signal and the user didn't specify a separate output file), make
216 * will need to rebuild the input file, and will then need to re-run
217 * ctfconvert, which is what we want.
218 */
219 set_terminate_cleanup(terminate_cleanup);
220
221 #ifdef illumos
222 sigset(SIGINT, handle_sig);
223 sigset(SIGQUIT, handle_sig);
224 sigset(SIGTERM, handle_sig);
225 #else
226 signal(SIGINT, handle_sig);
227 signal(SIGQUIT, handle_sig);
228 signal(SIGTERM, handle_sig);
229 #endif
230
231 filetd = tdata_new();
232
233 if (!file_read(filetd, infile, ignore_non_c))
234 terminate("%s doesn't have type data to convert\n", infile);
235
236 if (verbose)
237 iidesc_stats(filetd->td_iihash);
238
239 mstrtd = tdata_new();
240 merge_into_master(filetd, mstrtd, NULL, 1);
241
242 tdata_label_add(mstrtd, label, CTF_LABEL_LASTIDX);
243
244 /*
245 * If the user supplied an output file that is different from the
246 * input file, write directly to the output file. Otherwise, write
247 * to a temporary file, and replace the input file when we're done.
248 */
249 if (outfile && strcmp(infile, outfile) != 0) {
250 write_ctf(mstrtd, infile, outfile, dynsym | keep_stabs);
251 } else {
252 char *tmpname = mktmpname(infile, ".ctf");
253 write_ctf(mstrtd, infile, tmpname, dynsym | keep_stabs);
254 if (rename(tmpname, infile) != 0)
255 terminate("Couldn't rename temp file %s", tmpname);
256 free(tmpname);
257 }
258
259 return (0);
260 }
261