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sparc64-freebsd.c (158626) sparc64-freebsd.c (168569)
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.

--- 17 unchanged lines hidden (view full) ---

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.

--- 17 unchanged lines hidden (view full) ---

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/sparc64-fbsd.c 158626 2006-05-15 21:03:02Z pav $";
34 "$FreeBSD: head/usr.bin/truss/sparc64-fbsd.c 168569 2007-04-10 04:03:34Z delphij $";
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>
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/ioctl.h>
49#include <sys/pioctl.h>
48#include <sys/ptrace.h>
50#include <sys/syscall.h>
51
52#include <machine/frame.h>
53#include <machine/reg.h>
54#include <machine/tstate.h>
55
56#include <err.h>
57#include <errno.h>

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63#include <string.h>
64#include <time.h>
65#include <unistd.h>
66
67#include "truss.h"
68#include "syscall.h"
69#include "extern.h"
70
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>

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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
71static int fd = -1;
72static int cpid = -1;
73
74#include "syscalls.h"
75
76static int nsyscalls = sizeof(syscallnames) / sizeof(syscallnames[0]);
77
78/*
79 * This is what this particular file uses to keep track of a system call.

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113 * Called when a process has entered a system call. nargs is the
114 * number of words, not number of arguments (a necessary distinction
115 * in some cases). Note that if the STOPEVENT() code in sparc64/sparc64/trap.c
116 * is ever changed these functions need to keep up.
117 */
118
119void
120sparc64_syscall_entry(struct trussinfo *trussinfo, int nargs) {
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.

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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) {
121 char buf[32];
122 struct reg regs;
123 int syscall_num;
124 int i;
125 struct syscall *sc;
126 int indir = 0; /* indirect system call */
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;
127
125
128 if (fd == -1 || trussinfo->pid != cpid) {
129 sprintf(buf, "/proc/%d/regs", trussinfo->pid);
130 fd = open(buf, O_RDWR);
131 if (fd == -1) {
132 fprintf(trussinfo->outfile, "-- CANNOT OPEN REGISTERS --\n");
133 return;
134 }
135 cpid = trussinfo->pid;
136 }
126 cpid = trussinfo->curthread->tid;
137
138 clear_fsc();
127
128 clear_fsc();
139 lseek(fd, 0L, 0);
140 if (read(fd, &regs, sizeof(regs)) != sizeof(regs)) {
129
130 if (ptrace(PT_GETREGS, cpid, (caddr_t)&regs, 0) < 0) {
141 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
142 return;
143 }
144
145 /*
146 * FreeBSD has two special kinds of system call redirctions --
147 * SYS_syscall, and SYS___syscall. The former is the old syscall()
148 * routine, basicly; the latter is for quad-aligned arguments.

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160 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
161 }
162
163 if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
164 && ((!strcmp(fsc.name, "fork")
165 || !strcmp(fsc.name, "rfork")
166 || !strcmp(fsc.name, "vfork"))))
167 {
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.

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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 {
168 trussinfo->in_fork = 1;
158 trussinfo->curthread->in_fork = 1;
169 }
170
171 if (nargs == 0)
172 return;
173
174 fsc.args = malloc((1+nargs) * sizeof(unsigned long));
175 switch (nargs) {
176 default:

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181 warn("More than 10 words (%d) of arguments!\n", nargs);
182 break;
183 case 10: case 9: case 8: case 7:
184 /*
185 * If there are 7-10 words of arguments, they are placed
186 * on the stack, as is normal for other processors.
187 * The fall-through for all of these is deliberate!!!
188 */
159 }
160
161 if (nargs == 0)
162 return;
163
164 fsc.args = malloc((1+nargs) * sizeof(unsigned long));
165 switch (nargs) {
166 default:

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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 */
189 lseek(Procfd, regs.r_out[6] + SPOFF +
190 offsetof(struct frame, fr_pad[6]), SEEK_SET);
191 read(fd, &fsc.args[6], (nargs - 6) * sizeof(fsc.args[0]));
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
192 case 6: fsc.args[5] = regs.r_out[5];
193 case 5: fsc.args[4] = regs.r_out[4];
194 case 4: fsc.args[3] = regs.r_out[3];
195 case 3: fsc.args[2] = regs.r_out[2];
196 case 2: fsc.args[1] = regs.r_out[1];
197 case 1: fsc.args[0] = regs.r_out[0];
198 case 0:
199 break;

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235#if DEBUG
236 fprintf(stderr, "0x%x%s",
237 sc
238 ? fsc.args[sc->args[i].offset]
239 : fsc.args[i],
240 i < (fsc.nargs - 1) ? "," : "");
241#endif
242 if (sc && !(sc->args[i].type & OUT)) {
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;

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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)) {
243 fsc.s_args[i] = print_arg(Procfd, &sc->args[i], fsc.args, 0, trussinfo);
238 fsc.s_args[i] = print_arg(&sc->args[i], fsc.args, 0, trussinfo);
244 }
245 }
246#if DEBUG
247 fprintf(stderr, ")\n");
248#endif
249 }
250
251#if DEBUG

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290 * And when the system call is done, we handle it here.
291 * Currently, no attempt is made to ensure that the system calls
292 * match -- this needs to be fixed (and is, in fact, why S_SCX includes
293 * the sytem call number instead of, say, an error status).
294 */
295
296long
297sparc64_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) {
239 }
240 }
241#if DEBUG
242 fprintf(stderr, ")\n");
243#endif
244 }
245
246#if DEBUG

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285 * And when the system call is done, we handle it here.
286 * Currently, no attempt is made to ensure that the system calls
287 * match -- this needs to be fixed (and is, in fact, why S_SCX includes
288 * the sytem call number instead of, say, an error status).
289 */
290
291long
292sparc64_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) {
298 char buf[32];
299 struct reg regs;
300 long retval;
301 int i;
302 int errorp;
303 struct syscall *sc;
304
293 struct reg regs;
294 long retval;
295 int i;
296 int errorp;
297 struct syscall *sc;
298
305 if (fd == -1 || trussinfo->pid != cpid) {
306 sprintf(buf, "/proc/%d/regs", trussinfo->pid);
307 fd = open(buf, O_RDONLY);
308 if (fd == -1) {
309 fprintf(trussinfo->outfile, "-- CANNOT OPEN REGISTERS --\n");
310 return (-1);
311 }
312 cpid = trussinfo->pid;
313 }
299 cpid = trussinfo->curthread->tid;
314
300
315 lseek(fd, 0L, 0);
316 if (read(fd, &regs, sizeof(regs)) != sizeof(regs)) {
301 if (ptrace(PT_GETREGS, cpid, (caddr_t)&regs, 0) < 0) {
317 fprintf(trussinfo->outfile, "\n");
318 return (-1);
319 }
320 retval = regs.r_out[0];
321 errorp = !!(regs.r_tstate & TSTATE_XCC_C);
322
323 /*
324 * This code, while simpler than the initial versions I used, could

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339 if (sc->args[i].type & OUT) {
340 /*
341 * If an error occurred, than don't bothe getting the data;
342 * it may not be valid.
343 */
344 if (errorp)
345 asprintf(&temp, "0x%lx", fsc.args[sc->args[i].offset]);
346 else
302 fprintf(trussinfo->outfile, "\n");
303 return (-1);
304 }
305 retval = regs.r_out[0];
306 errorp = !!(regs.r_tstate & TSTATE_XCC_C);
307
308 /*
309 * This code, while simpler than the initial versions I used, could

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324 if (sc->args[i].type & OUT) {
325 /*
326 * If an error occurred, than don't bothe getting the data;
327 * it may not be valid.
328 */
329 if (errorp)
330 asprintf(&temp, "0x%lx", fsc.args[sc->args[i].offset]);
331 else
347 temp = print_arg(Procfd, &sc->args[i], fsc.args, retval, trussinfo);
332 temp = print_arg(&sc->args[i], fsc.args, retval, trussinfo);
348 fsc.s_args[i] = temp;
349 }
350 }
351 }
352
353 /*
354 * It would probably be a good idea to merge the error handling,
355 * but that complicates things considerably.
356 */
357
358 print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp, retval);
359 clear_fsc();
360
361 return (retval);
362}
333 fsc.s_args[i] = temp;
334 }
335 }
336 }
337
338 /*
339 * It would probably be a good idea to merge the error handling,
340 * but that complicates things considerably.
341 */
342
343 print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp, retval);
344 clear_fsc();
345
346 return (retval);
347}