1/*
2 * Copryight 1998 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[] =
| 1/*
2 * Copryight 1998 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[] =
|
35#endif /* not lint */
36
37/*
38 * FreeBSD/sparc64-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 * This file is almost nothing more than a slightly-edited i386-fbsd.c.
45 */
46
47#include <sys/types.h>
48#include <sys/ptrace.h>
49#include <sys/syscall.h>
50
51#include <machine/frame.h>
52#include <machine/reg.h>
53#include <machine/tstate.h>
54
55#include <err.h>
56#include <errno.h>
57#include <fcntl.h>
58#include <signal.h>
59#include <stddef.h>
60#include <stdio.h>
61#include <stdlib.h>
62#include <string.h>
63#include <time.h>
64#include <unistd.h>
65
66#include "truss.h"
67#include "syscall.h"
68#include "extern.h"
69
70static int cpid = -1;
71
72#include "syscalls.h"
73
74static int nsyscalls = sizeof(syscallnames) / sizeof(syscallnames[0]);
75
76/*
77 * This is what this particular file uses to keep track of a system call.
78 * It is probably not quite sufficient -- I can probably use the same
79 * structure for the various syscall personalities, and I also probably
80 * need to nest system calls (for signal handlers).
81 *
82 * 'struct syscall' describes the system call; it may be NULL, however,
83 * if we don't know about this particular system call yet.
84 */
85static struct freebsd_syscall {
86 struct syscall *sc;
87 const char *name;
88 int number;
89 unsigned long *args;
90 int nargs; /* number of arguments -- *not* number of words! */
91 char **s_args; /* the printable arguments */
92} fsc;
93
94/* Clear up and free parts of the fsc structure. */
95static __inline void
96clear_fsc(void) {
97 if (fsc.args) {
98 free(fsc.args);
99 }
100 if (fsc.s_args) {
101 int i;
102 for (i = 0; i < fsc.nargs; i++)
103 if (fsc.s_args[i])
104 free(fsc.s_args[i]);
105 free(fsc.s_args);
106 }
107 memset(&fsc, 0, sizeof(fsc));
108}
109
110/*
111 * Called when a process has entered a system call. nargs is the
112 * number of words, not number of arguments (a necessary distinction
113 * in some cases). Note that if the STOPEVENT() code in sparc64/sparc64/trap.c
114 * is ever changed these functions need to keep up.
115 */
116
117void
118sparc64_syscall_entry(struct trussinfo *trussinfo, int nargs) {
119 struct reg regs;
120 int syscall_num;
121 int i;
122 struct syscall *sc;
123 int indir = 0; /* indirect system call */
124 struct ptrace_io_desc iorequest;
125
126 cpid = trussinfo->curthread->tid;
127
128 clear_fsc();
129
130 if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) {
131 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
132 return;
133 }
134
135 /*
136 * FreeBSD has two special kinds of system call redirctions --
137 * SYS_syscall, and SYS___syscall. The former is the old syscall()
138 * routine, basicly; the latter is for quad-aligned arguments.
139 */
140 syscall_num = regs.r_global[1];
141 if (syscall_num == SYS_syscall || syscall_num == SYS___syscall) {
142 indir = 1;
143 syscall_num = regs.r_out[0];
144 }
145
146 fsc.number = syscall_num;
147 fsc.name =
148 (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : syscallnames[syscall_num];
149 if (!fsc.name) {
150 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
151 }
152
153 if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
154 && ((!strcmp(fsc.name, "fork")
155 || !strcmp(fsc.name, "rfork")
156 || !strcmp(fsc.name, "vfork"))))
157 {
158 trussinfo->curthread->in_fork = 1;
159 }
160
161 if (nargs == 0)
162 return;
163
164 fsc.args = malloc((1+nargs) * sizeof(unsigned long));
165 switch (nargs) {
166 default:
167 /*
168 * The OS doesn't seem to allow more than 10 words of
169 * parameters (yay!). So we shouldn't be here.
170 */
171 warn("More than 10 words (%d) of arguments!\n", nargs);
172 break;
173 case 10: case 9: case 8: case 7:
174 /*
175 * If there are 7-10 words of arguments, they are placed
176 * on the stack, as is normal for other processors.
177 * The fall-through for all of these is deliberate!!!
178 */
179 iorequest.piod_op = PIOD_READ_D;
180 iorequest.piod_offs = (void *)(regs.r_out[6] + SPOFF +
181 offsetof(struct frame, fr_pad[6]));
182 iorequest.piod_addr = &fsc.args[6];
183 iorequest.piod_len = (nargs - 6) * sizeof(fsc.args[0]);
184 ptrace(PT_IO, cpid, (caddr_t)&iorequest, 0);
185 if (iorequest.piod_len == 0) return;
186
187 case 6: fsc.args[5] = regs.r_out[5];
188 case 5: fsc.args[4] = regs.r_out[4];
189 case 4: fsc.args[3] = regs.r_out[3];
190 case 3: fsc.args[2] = regs.r_out[2];
191 case 2: fsc.args[1] = regs.r_out[1];
192 case 1: fsc.args[0] = regs.r_out[0];
193 case 0:
194 break;
195 }
196
197 if (indir) {
198 memmove(&fsc.args[0], &fsc.args[1], (nargs-1) * sizeof(fsc.args[0]));
199 }
200
201 sc = get_syscall(fsc.name);
202 if (sc) {
203 fsc.nargs = sc->nargs;
204 } else {
205#if DEBUG
206 fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
207 fsc.name, nargs);
208#endif
209 fsc.nargs = nargs;
210 }
211
212 fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*));
213 memset(fsc.s_args, 0, fsc.nargs * sizeof(char*));
214 fsc.sc = sc;
215
216 /*
217 * At this point, we set up the system call arguments.
218 * We ignore any OUT ones, however -- those are arguments that
219 * are set by the system call, and so are probably meaningless
220 * now. This doesn't currently support arguments that are
221 * passed in *and* out, however.
222 */
223
224 if (fsc.name) {
225
226#if DEBUG
227 fprintf(stderr, "syscall %s(", fsc.name);
228#endif
229 for (i = 0; i < fsc.nargs; i++) {
230#if DEBUG
231 fprintf(stderr, "0x%x%s",
232 sc
233 ? fsc.args[sc->args[i].offset]
234 : fsc.args[i],
235 i < (fsc.nargs - 1) ? "," : "");
236#endif
237 if (sc && !(sc->args[i].type & OUT)) {
238 fsc.s_args[i] = print_arg(&sc->args[i], fsc.args, 0, trussinfo);
239 }
240 }
241#if DEBUG
242 fprintf(stderr, ")\n");
243#endif
244 }
245
246#if DEBUG
247 fprintf(trussinfo->outfile, "\n");
248#endif
249
250 if (fsc.name != NULL &&
251 (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) {
252
253 /* XXX
254 * This could be done in a more general
255 * manner but it still wouldn't be very pretty.
256 */
257 if (!strcmp(fsc.name, "execve")) {
258 if ((trussinfo->flags & EXECVEARGS) == 0)
259 if (fsc.s_args[1]) {
260 free(fsc.s_args[1]);
261 fsc.s_args[1] = NULL;
262 }
263 if ((trussinfo->flags & EXECVEENVS) == 0)
264 if (fsc.s_args[2]) {
265 free(fsc.s_args[2]);
266 fsc.s_args[2] = NULL;
267 }
268 }
269 }
270
271 return;
272}
273
274/*
275 * And when the system call is done, we handle it here.
276 * Currently, no attempt is made to ensure that the system calls
277 * match -- this needs to be fixed (and is, in fact, why S_SCX includes
278 * the sytem call number instead of, say, an error status).
279 */
280
281long
282sparc64_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) {
283 struct reg regs;
284 long retval;
285 int i;
286 int errorp;
287 struct syscall *sc;
288
289 if (fsc.name == NULL)
290 return (-1);
291 cpid = trussinfo->curthread->tid;
292
293 if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) {
294 fprintf(trussinfo->outfile, "\n");
295 return (-1);
296 }
297 retval = regs.r_out[0];
298 errorp = !!(regs.r_tstate & TSTATE_XCC_C);
299
300 /*
301 * This code, while simpler than the initial versions I used, could
302 * stand some significant cleaning.
303 */
304
305 sc = fsc.sc;
306 if (!sc) {
307 for (i = 0; i < fsc.nargs; i++)
308 asprintf(&fsc.s_args[i], "0x%lx", fsc.args[i]);
309 } else {
310 /*
311 * Here, we only look for arguments that have OUT masked in --
312 * otherwise, they were handled in the syscall_entry function.
313 */
314 for (i = 0; i < sc->nargs; i++) {
315 char *temp;
316 if (sc->args[i].type & OUT) {
317 /*
318 * If an error occurred, than don't bothe getting the data;
319 * it may not be valid.
320 */
321 if (errorp)
322 asprintf(&temp, "0x%lx", fsc.args[sc->args[i].offset]);
323 else
324 temp = print_arg(&sc->args[i], fsc.args, retval, trussinfo);
325 fsc.s_args[i] = temp;
326 }
327 }
328 }
329
330 if (fsc.name != NULL &&
331 (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) {
332 trussinfo->curthread->in_syscall = 1;
333 }
334 /*
335 * It would probably be a good idea to merge the error handling,
336 * but that complicates things considerably.
337 */
338
| 35#endif /* not lint */
36
37/*
38 * FreeBSD/sparc64-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 * This file is almost nothing more than a slightly-edited i386-fbsd.c.
45 */
46
47#include <sys/types.h>
48#include <sys/ptrace.h>
49#include <sys/syscall.h>
50
51#include <machine/frame.h>
52#include <machine/reg.h>
53#include <machine/tstate.h>
54
55#include <err.h>
56#include <errno.h>
57#include <fcntl.h>
58#include <signal.h>
59#include <stddef.h>
60#include <stdio.h>
61#include <stdlib.h>
62#include <string.h>
63#include <time.h>
64#include <unistd.h>
65
66#include "truss.h"
67#include "syscall.h"
68#include "extern.h"
69
70static int cpid = -1;
71
72#include "syscalls.h"
73
74static int nsyscalls = sizeof(syscallnames) / sizeof(syscallnames[0]);
75
76/*
77 * This is what this particular file uses to keep track of a system call.
78 * It is probably not quite sufficient -- I can probably use the same
79 * structure for the various syscall personalities, and I also probably
80 * need to nest system calls (for signal handlers).
81 *
82 * 'struct syscall' describes the system call; it may be NULL, however,
83 * if we don't know about this particular system call yet.
84 */
85static struct freebsd_syscall {
86 struct syscall *sc;
87 const char *name;
88 int number;
89 unsigned long *args;
90 int nargs; /* number of arguments -- *not* number of words! */
91 char **s_args; /* the printable arguments */
92} fsc;
93
94/* Clear up and free parts of the fsc structure. */
95static __inline void
96clear_fsc(void) {
97 if (fsc.args) {
98 free(fsc.args);
99 }
100 if (fsc.s_args) {
101 int i;
102 for (i = 0; i < fsc.nargs; i++)
103 if (fsc.s_args[i])
104 free(fsc.s_args[i]);
105 free(fsc.s_args);
106 }
107 memset(&fsc, 0, sizeof(fsc));
108}
109
110/*
111 * Called when a process has entered a system call. nargs is the
112 * number of words, not number of arguments (a necessary distinction
113 * in some cases). Note that if the STOPEVENT() code in sparc64/sparc64/trap.c
114 * is ever changed these functions need to keep up.
115 */
116
117void
118sparc64_syscall_entry(struct trussinfo *trussinfo, int nargs) {
119 struct reg regs;
120 int syscall_num;
121 int i;
122 struct syscall *sc;
123 int indir = 0; /* indirect system call */
124 struct ptrace_io_desc iorequest;
125
126 cpid = trussinfo->curthread->tid;
127
128 clear_fsc();
129
130 if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) {
131 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
132 return;
133 }
134
135 /*
136 * FreeBSD has two special kinds of system call redirctions --
137 * SYS_syscall, and SYS___syscall. The former is the old syscall()
138 * routine, basicly; the latter is for quad-aligned arguments.
139 */
140 syscall_num = regs.r_global[1];
141 if (syscall_num == SYS_syscall || syscall_num == SYS___syscall) {
142 indir = 1;
143 syscall_num = regs.r_out[0];
144 }
145
146 fsc.number = syscall_num;
147 fsc.name =
148 (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : syscallnames[syscall_num];
149 if (!fsc.name) {
150 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
151 }
152
153 if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
154 && ((!strcmp(fsc.name, "fork")
155 || !strcmp(fsc.name, "rfork")
156 || !strcmp(fsc.name, "vfork"))))
157 {
158 trussinfo->curthread->in_fork = 1;
159 }
160
161 if (nargs == 0)
162 return;
163
164 fsc.args = malloc((1+nargs) * sizeof(unsigned long));
165 switch (nargs) {
166 default:
167 /*
168 * The OS doesn't seem to allow more than 10 words of
169 * parameters (yay!). So we shouldn't be here.
170 */
171 warn("More than 10 words (%d) of arguments!\n", nargs);
172 break;
173 case 10: case 9: case 8: case 7:
174 /*
175 * If there are 7-10 words of arguments, they are placed
176 * on the stack, as is normal for other processors.
177 * The fall-through for all of these is deliberate!!!
178 */
179 iorequest.piod_op = PIOD_READ_D;
180 iorequest.piod_offs = (void *)(regs.r_out[6] + SPOFF +
181 offsetof(struct frame, fr_pad[6]));
182 iorequest.piod_addr = &fsc.args[6];
183 iorequest.piod_len = (nargs - 6) * sizeof(fsc.args[0]);
184 ptrace(PT_IO, cpid, (caddr_t)&iorequest, 0);
185 if (iorequest.piod_len == 0) return;
186
187 case 6: fsc.args[5] = regs.r_out[5];
188 case 5: fsc.args[4] = regs.r_out[4];
189 case 4: fsc.args[3] = regs.r_out[3];
190 case 3: fsc.args[2] = regs.r_out[2];
191 case 2: fsc.args[1] = regs.r_out[1];
192 case 1: fsc.args[0] = regs.r_out[0];
193 case 0:
194 break;
195 }
196
197 if (indir) {
198 memmove(&fsc.args[0], &fsc.args[1], (nargs-1) * sizeof(fsc.args[0]));
199 }
200
201 sc = get_syscall(fsc.name);
202 if (sc) {
203 fsc.nargs = sc->nargs;
204 } else {
205#if DEBUG
206 fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
207 fsc.name, nargs);
208#endif
209 fsc.nargs = nargs;
210 }
211
212 fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*));
213 memset(fsc.s_args, 0, fsc.nargs * sizeof(char*));
214 fsc.sc = sc;
215
216 /*
217 * At this point, we set up the system call arguments.
218 * We ignore any OUT ones, however -- those are arguments that
219 * are set by the system call, and so are probably meaningless
220 * now. This doesn't currently support arguments that are
221 * passed in *and* out, however.
222 */
223
224 if (fsc.name) {
225
226#if DEBUG
227 fprintf(stderr, "syscall %s(", fsc.name);
228#endif
229 for (i = 0; i < fsc.nargs; i++) {
230#if DEBUG
231 fprintf(stderr, "0x%x%s",
232 sc
233 ? fsc.args[sc->args[i].offset]
234 : fsc.args[i],
235 i < (fsc.nargs - 1) ? "," : "");
236#endif
237 if (sc && !(sc->args[i].type & OUT)) {
238 fsc.s_args[i] = print_arg(&sc->args[i], fsc.args, 0, trussinfo);
239 }
240 }
241#if DEBUG
242 fprintf(stderr, ")\n");
243#endif
244 }
245
246#if DEBUG
247 fprintf(trussinfo->outfile, "\n");
248#endif
249
250 if (fsc.name != NULL &&
251 (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) {
252
253 /* XXX
254 * This could be done in a more general
255 * manner but it still wouldn't be very pretty.
256 */
257 if (!strcmp(fsc.name, "execve")) {
258 if ((trussinfo->flags & EXECVEARGS) == 0)
259 if (fsc.s_args[1]) {
260 free(fsc.s_args[1]);
261 fsc.s_args[1] = NULL;
262 }
263 if ((trussinfo->flags & EXECVEENVS) == 0)
264 if (fsc.s_args[2]) {
265 free(fsc.s_args[2]);
266 fsc.s_args[2] = NULL;
267 }
268 }
269 }
270
271 return;
272}
273
274/*
275 * And when the system call is done, we handle it here.
276 * Currently, no attempt is made to ensure that the system calls
277 * match -- this needs to be fixed (and is, in fact, why S_SCX includes
278 * the sytem call number instead of, say, an error status).
279 */
280
281long
282sparc64_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) {
283 struct reg regs;
284 long retval;
285 int i;
286 int errorp;
287 struct syscall *sc;
288
289 if (fsc.name == NULL)
290 return (-1);
291 cpid = trussinfo->curthread->tid;
292
293 if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) {
294 fprintf(trussinfo->outfile, "\n");
295 return (-1);
296 }
297 retval = regs.r_out[0];
298 errorp = !!(regs.r_tstate & TSTATE_XCC_C);
299
300 /*
301 * This code, while simpler than the initial versions I used, could
302 * stand some significant cleaning.
303 */
304
305 sc = fsc.sc;
306 if (!sc) {
307 for (i = 0; i < fsc.nargs; i++)
308 asprintf(&fsc.s_args[i], "0x%lx", fsc.args[i]);
309 } else {
310 /*
311 * Here, we only look for arguments that have OUT masked in --
312 * otherwise, they were handled in the syscall_entry function.
313 */
314 for (i = 0; i < sc->nargs; i++) {
315 char *temp;
316 if (sc->args[i].type & OUT) {
317 /*
318 * If an error occurred, than don't bothe getting the data;
319 * it may not be valid.
320 */
321 if (errorp)
322 asprintf(&temp, "0x%lx", fsc.args[sc->args[i].offset]);
323 else
324 temp = print_arg(&sc->args[i], fsc.args, retval, trussinfo);
325 fsc.s_args[i] = temp;
326 }
327 }
328 }
329
330 if (fsc.name != NULL &&
331 (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) {
332 trussinfo->curthread->in_syscall = 1;
333 }
334 /*
335 * It would probably be a good idea to merge the error handling,
336 * but that complicates things considerably.
337 */
338
|