Annotation of src/usr.bin/pmdb/process.c, Revision 1.13
1.13 ! jfb 1: /* $OpenBSD: process.c,v 1.12 2003/08/02 20:38:38 mickey Exp $ */
1.1 art 2: /*
3: * Copyright (c) 2002 Artur Grabowski <art@openbsd.org>
4: * All rights reserved.
5: *
6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
9: *
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. The name of the author may not be used to endorse or promote products
13: * derived from this software without specific prior written permission.
14: *
15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
16: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
17: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
18: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: #include <sys/types.h>
28: #include <sys/ptrace.h>
29: #include <sys/wait.h>
1.4 todd 30: #include <sys/stat.h>
31:
1.6 art 32: #include <machine/reg.h>
33:
1.3 fgsch 34: #include <err.h>
35: #include <errno.h>
36: #include <signal.h>
37: #include <stdio.h>
1.1 art 38: #include <stdlib.h>
1.3 fgsch 39: #include <string.h>
1.1 art 40: #include <unistd.h>
41:
42: #include "pmdb.h"
1.6 art 43: #include "core.h"
1.1 art 44: #include "symbol.h"
45: #include "break.h"
46:
47: int
48: process_load(struct pstate *ps)
49: {
50: if (ps->ps_state == LOADED)
51: return (0);
1.3 fgsch 52:
53: if (access(*ps->ps_argv, R_OK|X_OK) < 0) {
54: fprintf(stderr, "%s: %s.\n", *ps->ps_argv,
55: strerror(errno));
1.11 miod 56: return (1);
1.3 fgsch 57: }
1.1 art 58:
1.4 todd 59: if (stat(ps->ps_argv[0], &(ps->exec_stat)) < 0)
60: err(1, "stat()");
61:
1.6 art 62: if ((ps->ps_flags & PSF_SYMBOLS) == 0) {
63: sym_init_exec(ps, ps->ps_argv[0]);
64: ps->ps_flags |= PSF_SYMBOLS;
65: }
66:
67: ps->ps_state = LOADED;
68:
1.4 todd 69: if (ps->ps_pid != 0) {
70: /* attach to an already running process */
71: if (ptrace(PT_ATTACH, ps->ps_pid, (caddr_t) 0, 0) < 0)
72: err(1, "failed to ptrace process");
73: ps->ps_state = STOPPED;
74: ps->ps_flags |= PSF_ATCH;
75: }
76:
1.13 ! jfb 77: return (0);
! 78: }
! 79:
! 80:
! 81: int
! 82: process_setargv(struct pstate *ps, int argc, char **argv)
! 83: {
! 84: int i;
! 85:
! 86: if (ps->ps_argv != NULL) {
! 87: for (i = 0; i < ps->ps_argc; i++)
! 88: free(ps->ps_argv[i]);
! 89: free(ps->ps_argv);
! 90: }
! 91:
! 92: ps->ps_argv = (char **)calloc((argc + 1), sizeof(char *));
! 93: if (ps->ps_argv == NULL) {
! 94: warn("failed to allocate argument vector");
! 95: return (-1);
! 96: }
! 97:
! 98: ps->ps_argc = argc;
! 99: for (i = 0; i < argc; i++) {
! 100: ps->ps_argv[i] = strdup(argv[i]);
! 101: if (ps->ps_argv[i] == NULL) {
! 102: warn("failed to copy argument");
! 103: return (-1);
! 104: }
! 105: }
! 106:
! 107: ps->ps_argv[i] = NULL;
1.6 art 108: return (0);
109: }
110:
111:
112: int
113: process_run(struct pstate *ps)
114: {
115: int status;
116:
117: if ((ps->ps_state == RUNNING) || (ps->ps_state == STOPPED)) {
118: warnx("process is already running");
119: return 0;
1.1 art 120: }
121:
1.6 art 122: switch (ps->ps_pid = fork()) {
123: case 0:
124: if (ptrace(PT_TRACE_ME, getpid(), NULL, 0) != 0)
125: err(1, "ptrace(PT_TRACE_ME)");
126: execvp(*ps->ps_argv, ps->ps_argv);
127: err(1, "exec");
128: /* NOTREACHED */
129: case -1:
130: err(1, "fork");
131: /* NOTREACHED */
132: default:
133: warnx("process started with PID %d", ps->ps_pid);
134: break;
1.1 art 135: }
136:
1.6 art 137: ps->ps_state = LOADED;
138:
1.1 art 139: if (wait(&status) == 0)
140: err(1, "wait");
141:
1.5 fgsch 142: return (0);
1.1 art 143: }
144:
1.6 art 145:
1.1 art 146: int
147: process_kill(struct pstate *ps)
148: {
149: switch(ps->ps_state) {
150: case RUNNING:
151: case STOPPED:
152: if (ptrace(PT_KILL, ps->ps_pid, NULL, 0) != 0)
153: err(1, "ptrace(PT_KILL)");
1.5 fgsch 154: return (1);
1.1 art 155: default:
1.5 fgsch 156: return (0);
1.1 art 157: }
158: }
159:
160: int
1.6 art 161: process_read(struct pstate *ps, off_t from, void *to, size_t size)
162: {
163: struct ptrace_io_desc piod;
164:
165: if (((ps->ps_state == NONE) || (ps->ps_state == LOADED) ||
166: (ps->ps_state == TERMINATED)) && (ps->ps_flags & PSF_CORE)) {
167: return core_read(ps, from, to, size);
1.8 art 168: } else {
1.6 art 169: piod.piod_op = PIOD_READ_D;
170: piod.piod_offs = (void *)(long)from;
171: piod.piod_addr = to;
172: piod.piod_len = size;
173:
1.12 mickey 174: return (ptrace(PT_IO, ps->ps_pid, (caddr_t)&piod, 0) < 0?
175: -1 : piod.piod_len);
1.6 art 176: }
177: }
178:
179: int
180: process_write(struct pstate *ps, off_t to, void *from, size_t size)
181: {
182: struct ptrace_io_desc piod;
183:
1.8 art 184: if ((ps->ps_state == NONE) && (ps->ps_flags & PSF_CORE)) {
1.6 art 185: return core_write(ps, to, from, size);
1.8 art 186: } else {
1.6 art 187: piod.piod_op = PIOD_WRITE_D;
188: piod.piod_offs = (void *)(long)to;
189: piod.piod_addr = from;
190: piod.piod_len = size;
191:
1.12 mickey 192: return (ptrace(PT_IO, ps->ps_pid, (caddr_t)&piod, 0) < 0?
193: -1 : piod.piod_len);
1.6 art 194: }
195: }
196:
197: int
198: process_getregs(struct pstate *ps, struct reg *r)
199: {
200:
1.9 art 201: if (ps->ps_flags & PSF_CORE) {
1.6 art 202: memcpy(r, ps->ps_core->regs, sizeof(*r));
203:
1.9 art 204: return (0);
205: }
206:
207: return (ptrace(PT_GETREGS, ps->ps_pid, (caddr_t)r, 0));
1.6 art 208: }
209:
210: int
1.1 art 211: cmd_process_kill(int argc, char **argv, void *arg)
212: {
213: struct pstate *ps = arg;
214:
215: process_kill(ps);
216:
1.5 fgsch 217: return (1);
1.1 art 218: }
219:
220: int
221: process_bkpt_main(struct pstate *ps, void *arg)
222: {
223: sym_update(ps);
224:
1.5 fgsch 225: return (BKPT_DEL_CONT);
1.1 art 226: }
227:
228: int
229: cmd_process_run(int argc, char **argv, void *arg)
230: {
231: struct pstate *ps = arg;
232:
233: if (ps->ps_state == NONE) {
234: reg main_addr;
235:
1.11 miod 236: if (process_load(ps) != 0)
237: return (0);
238:
1.1 art 239: if (sym_lookup(ps, "main", &main_addr))
240: warnx("no main");
241: else if (bkpt_add_cb(ps, main_addr, process_bkpt_main, NULL))
242: warn("no bkpt at main 0x%lx", main_addr);
243: }
244:
245: if (ps->ps_state != LOADED) {
246: fprintf(stderr, "Process already running.\n");
1.5 fgsch 247: return (0);
1.1 art 248: }
249:
1.6 art 250: process_run(ps);
1.1 art 251: /*
252: * XXX - there isn't really any difference between STOPPED and
253: * LOADED, we should probably get rid of one.
254: */
255: ps->ps_state = STOPPED;
256: ps->ps_signum = 0;
257:
258: return (cmd_process_cont(argc, argv, arg));
259: }
260:
261: int
262: cmd_process_cont(int argc, char **argv, void *arg)
263: {
264: struct pstate *ps = arg;
265: int signum;
266: int req = (ps->ps_flags & PSF_STEP) ? PT_STEP : PT_CONTINUE;
267:
268: if (ps->ps_state != STOPPED) {
269: fprintf(stderr, "Process not loaded and stopped %d\n",
270: ps->ps_state);
271: return (0);
272: }
273:
274: /* Catch SIGINT and SIGTRAP, pass all other signals. */
275: switch (ps->ps_signum) {
276: case SIGINT:
277: case SIGTRAP:
278: signum = 0;
279: break;
280: default:
281: signum = ps->ps_signum;
282: break;
283: }
284:
285: if (ptrace(req, ps->ps_pid, (caddr_t)ps->ps_npc, signum) != 0) {
286: err(1, "ptrace(%s)", req == PT_STEP ? "PT_STEP":"PT_CONTINUE");
287: }
288:
289: ps->ps_state = RUNNING;
290: ps->ps_npc = 1;
291:
292: return (1);
1.10 art 293: }
294:
295: int
296: cmd_process_setenv(int argc, char **argv, void *arg)
297: {
298: if (setenv(argv[1], argv[2], 1))
299: err(1, "setenv");
300:
301: return (0);
1.1 art 302: }
![[BACK]](/icons/back.gif){kind=icon}
Return to process.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / pmdb