1/*
2 * Copryight 1997 Sean Eric Fagan
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. All advertising materials mentioning features or use of this software
13 * must display the following acknowledgement:
14 * This product includes software developed by Sean Eric Fagan
15 * 4. Neither the name of the author may be used to endorse or promote
16 * products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef lint
33static const char rcsid[] =
34 "$FreeBSD: head/usr.bin/truss/ia64-fbsd.c 111176 2003-02-20 15:05:39Z ru $";
35#endif /* not lint */
36
37/*
38 * FreeBSD/ia64-specific system call handling. This is probably the most
39 * complex part of the entire truss program, although I've got lots of
40 * it handled relatively cleanly now. The system call names are generated
41 * automatically, thanks to /usr/src/sys/kern/syscalls.master. The
42 * names used for the various structures are confusing, I sadly admit.
43 */
44
45#include <sys/types.h>
46#include <sys/ioctl.h>
47#include <sys/pioctl.h>
48#include <sys/syscall.h>
49
50#include <machine/reg.h>
51
52#include <errno.h>
53#include <fcntl.h>
54#include <signal.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <time.h>
59#include <unistd.h>
60
61#include "truss.h"
62#include "syscall.h"
63#include "extern.h"
64
65static int fd = -1;
66static int cpid = -1;
67extern int Procfd;
68
69#include "syscalls.h"
70
71static int nsyscalls = sizeof(syscallnames) / sizeof(syscallnames[0]);
72
73/*
74 * This is what this particular file uses to keep track of a system call.
75 * It is probably not quite sufficient -- I can probably use the same
76 * structure for the various syscall personalities, and I also probably
77 * need to nest system calls (for signal handlers).
78 *
79 * 'struct syscall' describes the system call; it may be NULL, however,
80 * if we don't know about this particular system call yet.
81 */
82static struct freebsd_syscall {
83 struct syscall *sc;
84 const char *name;
85 int number;
86 unsigned long *args;
87 int nargs; /* number of arguments -- *not* number of words! */
88 char **s_args; /* the printable arguments */
89} fsc;
90
91/* Clear up and free parts of the fsc structure. */
92static __inline void
93clear_fsc(void) {
94 if (fsc.args) {
95 free(fsc.args);
96 }
97 if (fsc.s_args) {
98 int i;
99 for (i = 0; i < fsc.nargs; i++)
100 if (fsc.s_args[i])
101 free(fsc.s_args[i]);
102 free(fsc.s_args);
103 }
104 memset(&fsc, 0, sizeof(fsc));
105}
106
107/*
108 * Called when a process has entered a system call. nargs is the
109 * number of words, not number of arguments (a necessary distinction
110 * in some cases). Note that if the STOPEVENT() code in ia64/ia64/trap.c
111 * is ever changed these functions need to keep up.
112 */
113
114void
115ia64_syscall_entry(struct trussinfo *trussinfo, int nargs) {
116 char buf[32];
117 struct reg regs;
118 int syscall_num;
119 int i;
120 unsigned int parm_offset;
121 struct syscall *sc;
122
123 if (fd == -1 || trussinfo->pid != cpid) {
124 sprintf(buf, "/proc/%d/regs", trussinfo->pid);
125 fd = open(buf, O_RDWR);
126 if (fd == -1) {
127 fprintf(trussinfo->outfile, "-- CANNOT OPEN REGISTERS --\n");
128 return;
129 }
130 cpid = trussinfo->pid;
131 }
132
133 clear_fsc();
134 lseek(fd, 0L, 0);
135 if (read(fd, ®s, sizeof(regs)) != sizeof(regs)) {
136 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
137 return;
138 }
139 parm_offset = regs.r_gr[12] + 16;
140
141 /*
142 * FreeBSD has two special kinds of system call redirctions --
143 * SYS_syscall, and SYS___syscall. The former is the old syscall()
144 * routine, basicly; the latter is for quad-aligned arguments.
145 */
146 syscall_num = regs.r_gr[15];
147 switch (syscall_num) {
148 case SYS_syscall:
149 lseek(Procfd, parm_offset, SEEK_SET);
150 read(Procfd, &syscall_num, sizeof(int));
151 parm_offset += sizeof(int);
152 break;
153 case SYS___syscall:
154 lseek(Procfd, parm_offset, SEEK_SET);
155 read(Procfd, &syscall_num, sizeof(int));
156 parm_offset += sizeof(quad_t);
157 break;
158 }
159
160 fsc.number = syscall_num;
161 fsc.name = (syscall_num < 0 || syscall_num > nsyscalls)
162 ? NULL : syscallnames[syscall_num];
163 if (!fsc.name) {
164 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
165 }
166
167 if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
168 && ((!strcmp(fsc.name, "fork")
169 || !strcmp(fsc.name, "rfork")
170 || !strcmp(fsc.name, "vfork"))))
171 {
172 trussinfo->in_fork = 1;
173 }
174
175 if (nargs == 0)
176 return;
177
178 fsc.args = malloc((1+nargs) * sizeof(unsigned long));
179 lseek(Procfd, parm_offset, SEEK_SET);
180 if (read(Procfd, fsc.args, nargs * sizeof(unsigned long)) == -1)
181 return;
182
183 sc = get_syscall(fsc.name);
184 if (sc) {
185 fsc.nargs = sc->nargs;
186 } else {
187#if DEBUG
188 fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
189 fsc.name, nargs);
190#endif
191 fsc.nargs = nargs;
192 }
193
194 fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*));
195 memset(fsc.s_args, 0, fsc.nargs * sizeof(char*));
196 fsc.sc = sc;
197
198 /*
199 * At this point, we set up the system call arguments.
200 * We ignore any OUT ones, however -- those are arguments that
201 * are set by the system call, and so are probably meaningless
202 * now. This doesn't currently support arguments that are
203 * passed in *and* out, however.
204 */
205
206 if (fsc.name) {
207
208#if DEBUG
209 fprintf(stderr, "syscall %s(", fsc.name);
210#endif
211 for (i = 0; i < fsc.nargs; i++) {
212#if DEBUG
213 fprintf(stderr, "0x%x%s",
214 sc
215 ? fsc.args[sc->args[i].offset]
216 : fsc.args[i],
217 i < (fsc.nargs - 1) ? "," : "");
218#endif
219 if (sc && !(sc->args[i].type & OUT)) {
220 fsc.s_args[i] = print_arg(Procfd, &sc->args[i], fsc.args);
221 }
222 }
223#if DEBUG
224 fprintf(stderr, ")\n");
225#endif
226 }
227
228#if DEBUG
229 fprintf(trussinfo->outfile, "\n");
230#endif
231
232 /*
233 * Some system calls should be printed out before they are done --
234 * execve() and exit(), for example, never return. Possibly change
235 * this to work for any system call that doesn't have an OUT
236 * parameter?
237 */
238
239 if (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit")) {
240
241 /* XXX
242 * This could be done in a more general
243 * manner but it still wouldn't be very pretty.
244 */
245 if (!strcmp(fsc.name, "execve")) {
246 if ((trussinfo->flags & EXECVEARGS) == 0)
247 if (fsc.s_args[1]) {
248 free(fsc.s_args[1]);
249 fsc.s_args[1] = NULL;
250 }
251 if ((trussinfo->flags & EXECVEENVS) == 0)
252 if (fsc.s_args[2]) {
253 free(fsc.s_args[2]);
254 fsc.s_args[2] = NULL;
255 }
256 }
257
258 print_syscall(trussinfo, fsc.name, fsc.nargs, fsc.s_args);
259 fprintf(trussinfo->outfile, "\n");
260 }
261
262 return;
263}
264
265/*
266 * And when the system call is done, we handle it here.
267 * Currently, no attempt is made to ensure that the system calls
268 * match -- this needs to be fixed (and is, in fact, why S_SCX includes
269 * the sytem call number instead of, say, an error status).
270 */
271
272int
273ia64_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) {
274 char buf[32];
275 struct reg regs;
276 int retval;
277 int i;
278 int errorp;
279 struct syscall *sc;
280
281 if (fd == -1 || trussinfo->pid != cpid) {
282 sprintf(buf, "/proc/%d/regs", trussinfo->pid);
283 fd = open(buf, O_RDONLY);
284 if (fd == -1) {
285 fprintf(trussinfo->outfile, "-- CANNOT OPEN REGISTERS --\n");
286 return (-1);
287 }
288 cpid = trussinfo->pid;
289 }
290
291 lseek(fd, 0L, 0);
292 if (read(fd, ®s, sizeof(regs)) != sizeof(regs)) {
293 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
294 return (-1);
295 }
296 retval = regs.r_gr[8];
297 errorp = (regs.r_gr[10] != 0) ? 1 : 0;
298
299 /*
300 * This code, while simpler than the initial versions I used, could
301 * stand some significant cleaning.
302 */
303
304 sc = fsc.sc;
305 if (!sc) {
306 for (i = 0; i < fsc.nargs; i++) {
307 fsc.s_args[i] = malloc(12);
308 sprintf(fsc.s_args[i], "0x%lx", fsc.args[i]);
309 }
310 } else {
311 /*
312 * Here, we only look for arguments that have OUT masked in --
313 * otherwise, they were handled in the syscall_entry function.
314 */
315 for (i = 0; i < sc->nargs; i++) {
316 char *temp;
317 if (sc->args[i].type & OUT) {
318 /*
319 * If an error occurred, than don't bothe getting the data;
320 * it may not be valid.
321 */
322 if (errorp) {
323 temp = malloc(12);
324 sprintf(temp, "0x%lx", fsc.args[sc->args[i].offset]);
325 } else {
326 temp = print_arg(Procfd, &sc->args[i], fsc.args);
327 }
328 fsc.s_args[i] = temp;
329 }
330 }
331 }
332
333 /*
334 * It would probably be a good idea to merge the error handling,
335 * but that complicates things considerably.
336 */
337
338 print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp, retval);
339 clear_fsc();
340
341 return (retval);
342}
2 * Copryight 1997 Sean Eric Fagan
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. All advertising materials mentioning features or use of this software
13 * must display the following acknowledgement:
14 * This product includes software developed by Sean Eric Fagan
15 * 4. Neither the name of the author may be used to endorse or promote
16 * products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef lint
33static const char rcsid[] =
34 "$FreeBSD: head/usr.bin/truss/ia64-fbsd.c 111176 2003-02-20 15:05:39Z ru $";
35#endif /* not lint */
36
37/*
38 * FreeBSD/ia64-specific system call handling. This is probably the most
39 * complex part of the entire truss program, although I've got lots of
40 * it handled relatively cleanly now. The system call names are generated
41 * automatically, thanks to /usr/src/sys/kern/syscalls.master. The
42 * names used for the various structures are confusing, I sadly admit.
43 */
44
45#include <sys/types.h>
46#include <sys/ioctl.h>
47#include <sys/pioctl.h>
48#include <sys/syscall.h>
49
50#include <machine/reg.h>
51
52#include <errno.h>
53#include <fcntl.h>
54#include <signal.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <time.h>
59#include <unistd.h>
60
61#include "truss.h"
62#include "syscall.h"
63#include "extern.h"
64
65static int fd = -1;
66static int cpid = -1;
67extern int Procfd;
68
69#include "syscalls.h"
70
71static int nsyscalls = sizeof(syscallnames) / sizeof(syscallnames[0]);
72
73/*
74 * This is what this particular file uses to keep track of a system call.
75 * It is probably not quite sufficient -- I can probably use the same
76 * structure for the various syscall personalities, and I also probably
77 * need to nest system calls (for signal handlers).
78 *
79 * 'struct syscall' describes the system call; it may be NULL, however,
80 * if we don't know about this particular system call yet.
81 */
82static struct freebsd_syscall {
83 struct syscall *sc;
84 const char *name;
85 int number;
86 unsigned long *args;
87 int nargs; /* number of arguments -- *not* number of words! */
88 char **s_args; /* the printable arguments */
89} fsc;
90
91/* Clear up and free parts of the fsc structure. */
92static __inline void
93clear_fsc(void) {
94 if (fsc.args) {
95 free(fsc.args);
96 }
97 if (fsc.s_args) {
98 int i;
99 for (i = 0; i < fsc.nargs; i++)
100 if (fsc.s_args[i])
101 free(fsc.s_args[i]);
102 free(fsc.s_args);
103 }
104 memset(&fsc, 0, sizeof(fsc));
105}
106
107/*
108 * Called when a process has entered a system call. nargs is the
109 * number of words, not number of arguments (a necessary distinction
110 * in some cases). Note that if the STOPEVENT() code in ia64/ia64/trap.c
111 * is ever changed these functions need to keep up.
112 */
113
114void
115ia64_syscall_entry(struct trussinfo *trussinfo, int nargs) {
116 char buf[32];
117 struct reg regs;
118 int syscall_num;
119 int i;
120 unsigned int parm_offset;
121 struct syscall *sc;
122
123 if (fd == -1 || trussinfo->pid != cpid) {
124 sprintf(buf, "/proc/%d/regs", trussinfo->pid);
125 fd = open(buf, O_RDWR);
126 if (fd == -1) {
127 fprintf(trussinfo->outfile, "-- CANNOT OPEN REGISTERS --\n");
128 return;
129 }
130 cpid = trussinfo->pid;
131 }
132
133 clear_fsc();
134 lseek(fd, 0L, 0);
135 if (read(fd, ®s, sizeof(regs)) != sizeof(regs)) {
136 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
137 return;
138 }
139 parm_offset = regs.r_gr[12] + 16;
140
141 /*
142 * FreeBSD has two special kinds of system call redirctions --
143 * SYS_syscall, and SYS___syscall. The former is the old syscall()
144 * routine, basicly; the latter is for quad-aligned arguments.
145 */
146 syscall_num = regs.r_gr[15];
147 switch (syscall_num) {
148 case SYS_syscall:
149 lseek(Procfd, parm_offset, SEEK_SET);
150 read(Procfd, &syscall_num, sizeof(int));
151 parm_offset += sizeof(int);
152 break;
153 case SYS___syscall:
154 lseek(Procfd, parm_offset, SEEK_SET);
155 read(Procfd, &syscall_num, sizeof(int));
156 parm_offset += sizeof(quad_t);
157 break;
158 }
159
160 fsc.number = syscall_num;
161 fsc.name = (syscall_num < 0 || syscall_num > nsyscalls)
162 ? NULL : syscallnames[syscall_num];
163 if (!fsc.name) {
164 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
165 }
166
167 if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
168 && ((!strcmp(fsc.name, "fork")
169 || !strcmp(fsc.name, "rfork")
170 || !strcmp(fsc.name, "vfork"))))
171 {
172 trussinfo->in_fork = 1;
173 }
174
175 if (nargs == 0)
176 return;
177
178 fsc.args = malloc((1+nargs) * sizeof(unsigned long));
179 lseek(Procfd, parm_offset, SEEK_SET);
180 if (read(Procfd, fsc.args, nargs * sizeof(unsigned long)) == -1)
181 return;
182
183 sc = get_syscall(fsc.name);
184 if (sc) {
185 fsc.nargs = sc->nargs;
186 } else {
187#if DEBUG
188 fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
189 fsc.name, nargs);
190#endif
191 fsc.nargs = nargs;
192 }
193
194 fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*));
195 memset(fsc.s_args, 0, fsc.nargs * sizeof(char*));
196 fsc.sc = sc;
197
198 /*
199 * At this point, we set up the system call arguments.
200 * We ignore any OUT ones, however -- those are arguments that
201 * are set by the system call, and so are probably meaningless
202 * now. This doesn't currently support arguments that are
203 * passed in *and* out, however.
204 */
205
206 if (fsc.name) {
207
208#if DEBUG
209 fprintf(stderr, "syscall %s(", fsc.name);
210#endif
211 for (i = 0; i < fsc.nargs; i++) {
212#if DEBUG
213 fprintf(stderr, "0x%x%s",
214 sc
215 ? fsc.args[sc->args[i].offset]
216 : fsc.args[i],
217 i < (fsc.nargs - 1) ? "," : "");
218#endif
219 if (sc && !(sc->args[i].type & OUT)) {
220 fsc.s_args[i] = print_arg(Procfd, &sc->args[i], fsc.args);
221 }
222 }
223#if DEBUG
224 fprintf(stderr, ")\n");
225#endif
226 }
227
228#if DEBUG
229 fprintf(trussinfo->outfile, "\n");
230#endif
231
232 /*
233 * Some system calls should be printed out before they are done --
234 * execve() and exit(), for example, never return. Possibly change
235 * this to work for any system call that doesn't have an OUT
236 * parameter?
237 */
238
239 if (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit")) {
240
241 /* XXX
242 * This could be done in a more general
243 * manner but it still wouldn't be very pretty.
244 */
245 if (!strcmp(fsc.name, "execve")) {
246 if ((trussinfo->flags & EXECVEARGS) == 0)
247 if (fsc.s_args[1]) {
248 free(fsc.s_args[1]);
249 fsc.s_args[1] = NULL;
250 }
251 if ((trussinfo->flags & EXECVEENVS) == 0)
252 if (fsc.s_args[2]) {
253 free(fsc.s_args[2]);
254 fsc.s_args[2] = NULL;
255 }
256 }
257
258 print_syscall(trussinfo, fsc.name, fsc.nargs, fsc.s_args);
259 fprintf(trussinfo->outfile, "\n");
260 }
261
262 return;
263}
264
265/*
266 * And when the system call is done, we handle it here.
267 * Currently, no attempt is made to ensure that the system calls
268 * match -- this needs to be fixed (and is, in fact, why S_SCX includes
269 * the sytem call number instead of, say, an error status).
270 */
271
272int
273ia64_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) {
274 char buf[32];
275 struct reg regs;
276 int retval;
277 int i;
278 int errorp;
279 struct syscall *sc;
280
281 if (fd == -1 || trussinfo->pid != cpid) {
282 sprintf(buf, "/proc/%d/regs", trussinfo->pid);
283 fd = open(buf, O_RDONLY);
284 if (fd == -1) {
285 fprintf(trussinfo->outfile, "-- CANNOT OPEN REGISTERS --\n");
286 return (-1);
287 }
288 cpid = trussinfo->pid;
289 }
290
291 lseek(fd, 0L, 0);
292 if (read(fd, ®s, sizeof(regs)) != sizeof(regs)) {
293 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
294 return (-1);
295 }
296 retval = regs.r_gr[8];
297 errorp = (regs.r_gr[10] != 0) ? 1 : 0;
298
299 /*
300 * This code, while simpler than the initial versions I used, could
301 * stand some significant cleaning.
302 */
303
304 sc = fsc.sc;
305 if (!sc) {
306 for (i = 0; i < fsc.nargs; i++) {
307 fsc.s_args[i] = malloc(12);
308 sprintf(fsc.s_args[i], "0x%lx", fsc.args[i]);
309 }
310 } else {
311 /*
312 * Here, we only look for arguments that have OUT masked in --
313 * otherwise, they were handled in the syscall_entry function.
314 */
315 for (i = 0; i < sc->nargs; i++) {
316 char *temp;
317 if (sc->args[i].type & OUT) {
318 /*
319 * If an error occurred, than don't bothe getting the data;
320 * it may not be valid.
321 */
322 if (errorp) {
323 temp = malloc(12);
324 sprintf(temp, "0x%lx", fsc.args[sc->args[i].offset]);
325 } else {
326 temp = print_arg(Procfd, &sc->args[i], fsc.args);
327 }
328 fsc.s_args[i] = temp;
329 }
330 }
331 }
332
333 /*
334 * It would probably be a good idea to merge the error handling,
335 * but that complicates things considerably.
336 */
337
338 print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp, retval);
339 clear_fsc();
340
341 return (retval);
342}