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 /*
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <libdisasm.h>
30 #include <stdlib.h>
31 #include <stdio.h>
32
33 #include "dis_tables.h"
34 #include "libdisasm_impl.h"
35
36 struct dis_handle {
37 void *dh_data;
38 int dh_flags;
39 dis_lookup_f dh_lookup;
40 dis_read_f dh_read;
41 int dh_mode;
42 dis86_t dh_dis;
43 uint64_t dh_addr;
44 uint64_t dh_end;
45 };
46
47 /*
48 * Returns true if we are near the end of a function. This is a cheap hack at
228 }
229
230 if (addr != pc) {
231 /*
232 * We scanned past %pc, but didn't find an instruction that
233 * started at %pc. This means that either the caller specified
234 * an invalid address, or we ran into something other than code
235 * during our scan. Virtually any combination of bytes can be
236 * construed as a valid Intel instruction, so any non-code bytes
237 * we encounter will have thrown off the scan.
238 */
239 goto done;
240 }
241
242 res = hist[(cur + n - MIN(n, nseen)) % n];
243
244 done:
245 dis_free(hist, sizeof (uint64_t) * n);
246 return (res);
247 }
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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 /*
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <libdisasm.h>
28 #include <stdlib.h>
29 #include <stdio.h>
30
31 #include "dis_tables.h"
32 #include "libdisasm_impl.h"
33
34 struct dis_handle {
35 void *dh_data;
36 int dh_flags;
37 dis_lookup_f dh_lookup;
38 dis_read_f dh_read;
39 int dh_mode;
40 dis86_t dh_dis;
41 uint64_t dh_addr;
42 uint64_t dh_end;
43 };
44
45 /*
46 * Returns true if we are near the end of a function. This is a cheap hack at
226 }
227
228 if (addr != pc) {
229 /*
230 * We scanned past %pc, but didn't find an instruction that
231 * started at %pc. This means that either the caller specified
232 * an invalid address, or we ran into something other than code
233 * during our scan. Virtually any combination of bytes can be
234 * construed as a valid Intel instruction, so any non-code bytes
235 * we encounter will have thrown off the scan.
236 */
237 goto done;
238 }
239
240 res = hist[(cur + n - MIN(n, nseen)) % n];
241
242 done:
243 dis_free(hist, sizeof (uint64_t) * n);
244 return (res);
245 }
246
247 int
248 dis_instrlen(dis_handle_t *dhp, uint64_t pc)
249 {
250 if (dis_disassemble(dhp, pc, NULL, 0) != 0)
251 return (-1);
252
253 return (dhp->dh_addr - pc);
254 }
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