xref: /illumos-gate/usr/src/cmd/truss/actions.c (revision 55d6cb5d63bcf69dfa47b8c41c770a2d34f169b0) 
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 
26 /*	Copyright (c) 1988 AT&T	*/
27 /*	  All Rights Reserved  	*/
28 
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <unistd.h>
32 #include <ctype.h>
33 #include <string.h>
34 #include <memory.h>
35 #include <errno.h>
36 #include <limits.h>
37 #include <sys/types.h>
38 #include <sys/stack.h>
39 #include <signal.h>
40 #include <sys/isa_defs.h>
41 #include <libproc.h>
42 #include <priv.h>
43 #include "ramdata.h"
44 #include "systable.h"
45 #include "print.h"
46 #include "proto.h"
47 
48 /*
49  * Actions to take when process stops.
50  */
51 
52 /*
53  * Function prototypes for static routines in this module.
54  */
55 int	stopsig(private_t *);
56 void	showpaths(private_t *, const struct systable *);
57 void	showargs(private_t *, int);
58 void	dumpargs(private_t *, long, const char *);
59 
60 /*
61  * Report an lwp to be sleeping (if true).
62  */
63 void
64 report_sleeping(private_t *pri, int dotrace)
65 {
66 	const lwpstatus_t *Lsp = pri->lwpstat;
67 	int sys = Lsp->pr_syscall;
68 
69 	if (!prismember(&trace, sys) || !dotrace ||
70 	    !(Lsp->pr_flags & (PR_ASLEEP|PR_VFORKP))) {
71 		/* Make sure we catch sysexit even if we're not tracing it. */
72 		(void) Psysexit(Proc, sys, TRUE);
73 		return;
74 	}
75 
76 	pri->length = 0;
77 	pri->Errno = 0;
78 	pri->ErrPriv = PRIV_NONE;
79 	pri->Rval1 = pri->Rval2 = 0;
80 	(void) sysentry(pri, dotrace);
81 	make_pname(pri, 0);
82 	putpname(pri);
83 	timestamp(pri);
84 	pri->length += printf("%s", pri->sys_string);
85 	pri->sys_leng = 0;
86 	*pri->sys_string = '\0';
87 	pri->length >>= 3;
88 	if (Lsp->pr_flags & PR_VFORKP)
89 		pri->length += 2;
90 	if (pri->length >= 4)
91 		(void) fputc(' ', stdout);
92 	for (; pri->length < 4; pri->length++)
93 		(void) fputc('\t', stdout);
94 	if (Lsp->pr_flags & PR_VFORKP)
95 		(void) fputs("(waiting for child to exit()/exec()...)\n",
96 		    stdout);
97 	else
98 		(void) fputs("(sleeping...)\n", stdout);
99 	pri->length = 0;
100 	if (prismember(&verbose, sys)) {
101 		int raw = prismember(&rawout, sys);
102 		pri->Errno = 1;
103 		expound(pri, 0, raw);
104 		pri->Errno = 0;
105 	}
106 	Flush();
107 }
108 
109 /*
110  * requested() gets called for these reasons:
111  *	flag == JOBSIG:		report nothing; change state to JOBSTOP
112  *	flag == JOBSTOP:	report "Continued ..."
113  *	default:		report sleeping system call
114  *
115  * It returns a new flag:  JOBSTOP or SLEEPING or 0.
116  */
117 int
118 requested(private_t *pri, int flag, int dotrace)
119 {
120 	const lwpstatus_t *Lsp = pri->lwpstat;
121 	int sig = Lsp->pr_cursig;
122 	int newflag = 0;
123 
124 	switch (flag) {
125 	case JOBSIG:
126 		return (JOBSTOP);
127 
128 	case JOBSTOP:
129 		if (dotrace && !cflag && prismember(&signals, sig)) {
130 			pri->length = 0;
131 			putpname(pri);
132 			timestamp(pri);
133 			(void) printf("    Continued with signal #%d, %s",
134 			    sig, signame(pri, sig));
135 			if (Lsp->pr_action.sa_handler == SIG_DFL)
136 				(void) printf(" [default]");
137 			else if (Lsp->pr_action.sa_handler == SIG_IGN)
138 				(void) printf(" [ignored]");
139 			else
140 				(void) printf(" [caught]");
141 			(void) fputc('\n', stdout);
142 			Flush();
143 		}
144 		newflag = 0;
145 		break;
146 
147 	default:
148 		newflag = SLEEPING;
149 		if (!cflag)
150 			report_sleeping(pri, dotrace);
151 		break;
152 	}
153 
154 	return (newflag);
155 }
156 
157 int
158 jobcontrol(private_t *pri, int dotrace)
159 {
160 	const lwpstatus_t *Lsp = pri->lwpstat;
161 	int sig = stopsig(pri);
162 
163 	if (sig == 0)
164 		return (0);
165 
166 	if (dotrace && !cflag &&		/* not just counting */
167 	    prismember(&signals, sig)) {	/* tracing this signal */
168 		int sys;
169 
170 		pri->length = 0;
171 		putpname(pri);
172 		timestamp(pri);
173 		(void) printf("    Stopped by signal #%d, %s",
174 		    sig, signame(pri, sig));
175 		if ((Lsp->pr_flags & PR_ASLEEP) &&
176 		    (sys = Lsp->pr_syscall) > 0 && sys <= PRMAXSYS)
177 			(void) printf(", in %s()",
178 			    sysname(pri, sys, getsubcode(pri)));
179 		(void) fputc('\n', stdout);
180 		Flush();
181 	}
182 
183 	return (JOBSTOP);
184 }
185 
186 /*
187  * Return the signal the process stopped on iff process is already stopped on
188  * PR_JOBCONTROL or is stopped on PR_SIGNALLED or PR_REQUESTED with a current
189  * signal that will cause a JOBCONTROL stop when the process is set running.
190  */
191 int
192 stopsig(private_t *pri)
193 {
194 	const lwpstatus_t *Lsp = pri->lwpstat;
195 	int sig = 0;
196 
197 	if (Lsp->pr_flags & PR_STOPPED) {
198 		switch (Lsp->pr_why) {
199 		case PR_JOBCONTROL:
200 			sig = Lsp->pr_what;
201 			if (sig < 0 || sig > PRMAXSIG)
202 				sig = 0;
203 			break;
204 		case PR_SIGNALLED:
205 		case PR_REQUESTED:
206 			if (Lsp->pr_action.sa_handler == SIG_DFL) {
207 				switch (Lsp->pr_cursig) {
208 				case SIGSTOP:
209 					sig = SIGSTOP;
210 					break;
211 				case SIGTSTP:
212 				case SIGTTIN:
213 				case SIGTTOU:
214 					if (!(Lsp->pr_flags & PR_ORPHAN))
215 						sig = Lsp->pr_cursig;
216 					break;
217 				}
218 			}
219 			break;
220 		}
221 	}
222 
223 	return (sig);
224 }
225 
226 int
227 signalled(private_t *pri, int flag, int dotrace)
228 {
229 	const lwpstatus_t *Lsp = pri->lwpstat;
230 	int sig = Lsp->pr_what;
231 
232 	if (sig <= 0 || sig > PRMAXSIG)	/* check bounds */
233 		return (0);
234 
235 	if (dotrace && cflag) {			/* just counting */
236 		(void) mutex_lock(&count_lock);
237 		Cp->sigcount[sig]++;
238 		(void) mutex_unlock(&count_lock);
239 	}
240 
241 	if (sig == SIGCONT && (flag == JOBSIG || flag == JOBSTOP))
242 		flag = requested(pri, JOBSTOP, dotrace);
243 	else if ((flag = jobcontrol(pri, dotrace)) == 0 &&
244 	    !cflag && dotrace &&
245 	    prismember(&signals, sig)) {
246 		int sys;
247 
248 		pri->length = 0;
249 		putpname(pri);
250 		timestamp(pri);
251 		(void) printf("    Received signal #%d, %s",
252 		    sig, signame(pri, sig));
253 		if ((Lsp->pr_flags & PR_ASLEEP) &&
254 		    (sys = Lsp->pr_syscall) > 0 && sys <= PRMAXSYS)
255 			(void) printf(", in %s()",
256 			    sysname(pri, sys, getsubcode(pri)));
257 		if (Lsp->pr_action.sa_handler == SIG_DFL)
258 			(void) printf(" [default]");
259 		else if (Lsp->pr_action.sa_handler == SIG_IGN)
260 			(void) printf(" [ignored]");
261 		else
262 			(void) printf(" [caught]");
263 		(void) fputc('\n', stdout);
264 		if (Lsp->pr_info.si_code != 0 ||
265 		    Lsp->pr_info.si_pid != 0)
266 			print_siginfo(pri, &Lsp->pr_info);
267 		Flush();
268 	}
269 
270 	if (flag == JOBSTOP)
271 		flag = JOBSIG;
272 	return (flag);
273 }
274 
275 int
276 faulted(private_t *pri, int dotrace)
277 {
278 	const lwpstatus_t *Lsp = pri->lwpstat;
279 	int flt = Lsp->pr_what;
280 
281 	if ((uint_t)flt > PRMAXFAULT || !prismember(&faults, flt) || !dotrace)
282 		return (0);
283 
284 	(void) mutex_lock(&count_lock);
285 	Cp->fltcount[flt]++;
286 	(void) mutex_unlock(&count_lock);
287 
288 	if (cflag)		/* just counting */
289 		return (1);
290 
291 	pri->length = 0;
292 	putpname(pri);
293 	timestamp(pri);
294 
295 	(void) printf("    Incurred fault #%d, %s  %%pc = 0x%.8lX",
296 	    flt, proc_fltname(flt, pri->flt_name, sizeof (pri->flt_name)),
297 	    (long)Lsp->pr_reg[R_PC]);
298 
299 	if (flt == FLTPAGE)
300 		(void) printf("  addr = 0x%.8lX",
301 		    (long)Lsp->pr_info.si_addr);
302 	(void) fputc('\n', stdout);
303 	if (Lsp->pr_info.si_signo != 0)
304 		print_siginfo(pri, &Lsp->pr_info);
305 	Flush();
306 	return (1);
307 }
308 
309 /*
310  * Set up pri->sys_nargs and pri->sys_args[] (syscall args).
311  */
312 void
313 setupsysargs(private_t *pri, int what)
314 {
315 	const lwpstatus_t *Lsp = pri->lwpstat;
316 	int nargs;
317 	int i;
318 
319 #if sparc
320 	/* determine whether syscall is indirect */
321 	pri->sys_indirect = (Lsp->pr_reg[R_G1] == SYS_syscall)? 1 : 0;
322 #else
323 	pri->sys_indirect = 0;
324 #endif
325 
326 	(void) memset(pri->sys_args, 0, sizeof (pri->sys_args));
327 	if (what != Lsp->pr_syscall) {	/* assertion */
328 		(void) printf("%s\t*** Inconsistent syscall: %d vs %d ***\n",
329 		    pri->pname, what, Lsp->pr_syscall);
330 	}
331 	nargs = Lsp->pr_nsysarg;
332 	for (i = 0;
333 	    i < nargs && i < sizeof (pri->sys_args) / sizeof (pri->sys_args[0]);
334 	    i++)
335 		pri->sys_args[i] = Lsp->pr_sysarg[i];
336 	pri->sys_nargs = nargs;
337 }
338 
339 #define	ISREAD(code) \
340 	((code) == SYS_read || (code) == SYS_pread || \
341 	(code) == SYS_pread64 || (code) == SYS_readv || \
342 	(code) == SYS_recv || (code) == SYS_recvfrom)
343 #define	ISWRITE(code) \
344 	((code) == SYS_write || (code) == SYS_pwrite || \
345 	(code) == SYS_pwrite64 || (code) == SYS_writev || \
346 	(code) == SYS_send || (code) == SYS_sendto)
347 
348 /*
349  * Return TRUE iff syscall is being traced.
350  */
351 int
352 sysentry(private_t *pri, int dotrace)
353 {
354 	pid_t pid = Pstatus(Proc)->pr_pid;
355 	const lwpstatus_t *Lsp = pri->lwpstat;
356 	long arg;
357 	int nargs;
358 	int i;
359 	int x;
360 	int len;
361 	char *s;
362 	const struct systable *stp;
363 	int what = Lsp->pr_what;
364 	int subcode;
365 	int istraced;
366 	int raw;
367 
368 	/* for reporting sleeping system calls */
369 	if (what == 0 && (Lsp->pr_flags & (PR_ASLEEP|PR_VFORKP)))
370 		what = Lsp->pr_syscall;
371 
372 	/* protect ourself from operating system error */
373 	if (what <= 0 || what > PRMAXSYS)
374 		what = 0;
375 
376 	/*
377 	 * Set up the system call arguments (pri->sys_nargs & pri->sys_args[]).
378 	 */
379 	setupsysargs(pri, what);
380 	nargs = pri->sys_nargs;
381 
382 	/* get systable entry for this syscall */
383 	subcode = getsubcode(pri);
384 	stp = subsys(what, subcode);
385 
386 	if (nargs > stp->nargs)
387 		nargs = stp->nargs;
388 	pri->sys_nargs = nargs;
389 
390 	/*
391 	 * Fetch and remember first argument if it's a string,
392 	 * or second argument if SYS_openat or SYS_openat64.
393 	 */
394 	pri->sys_valid = FALSE;
395 	if ((nargs > 0 && stp->arg[0] == STG) ||
396 	    (nargs > 1 && (what == SYS_openat || what == SYS_openat64))) {
397 		long offset;
398 		uint32_t offset32;
399 
400 		/*
401 		 * Special case for exit from exec().
402 		 * The address in pri->sys_args[0] refers to the old process
403 		 * image.  We must fetch the string from the new image.
404 		 */
405 		if (Lsp->pr_why == PR_SYSEXIT && what == SYS_execve) {
406 			psinfo_t psinfo;
407 			long argv;
408 			auxv_t auxv[32];
409 			int naux;
410 
411 			offset = 0;
412 			naux = proc_get_auxv(pid, auxv, 32);
413 			for (i = 0; i < naux; i++) {
414 				if (auxv[i].a_type == AT_SUN_EXECNAME) {
415 					offset = (long)auxv[i].a_un.a_ptr;
416 					break;
417 				}
418 			}
419 			if (offset == 0 &&
420 			    proc_get_psinfo(pid, &psinfo) == 0) {
421 				argv = (long)psinfo.pr_argv;
422 				if (data_model == PR_MODEL_LP64)
423 					(void) Pread(Proc, &offset,
424 					    sizeof (offset), argv);
425 				else {
426 					offset32 = 0;
427 					(void) Pread(Proc, &offset32,
428 					    sizeof (offset32), argv);
429 					offset = offset32;
430 				}
431 			}
432 		} else if (stp->arg[0] == STG) {
433 			offset = pri->sys_args[0];
434 		} else {
435 			offset = pri->sys_args[1];
436 		}
437 		if ((s = fetchstring(pri, offset, PATH_MAX)) != NULL) {
438 			pri->sys_valid = TRUE;
439 			len = strlen(s);
440 			/* reallocate if necessary */
441 			while (len >= pri->sys_psize) {
442 				free(pri->sys_path);
443 				pri->sys_path = my_malloc(pri->sys_psize *= 2,
444 				    "pathname buffer");
445 			}
446 			(void) strcpy(pri->sys_path, s); /* remember pathname */
447 		}
448 	}
449 
450 	istraced = dotrace && prismember(&trace, what);
451 	raw = prismember(&rawout, what);
452 
453 	/* force tracing of read/write buffer dump syscalls */
454 	if (!istraced && nargs > 2) {
455 		int fdp1 = (int)pri->sys_args[0] + 1;
456 
457 		if (ISREAD(what)) {
458 			if (prismember(&readfd, fdp1))
459 				istraced = TRUE;
460 		} else if (ISWRITE(what)) {
461 			if (prismember(&writefd, fdp1))
462 				istraced = TRUE;
463 		}
464 	}
465 
466 	pri->sys_leng = 0;
467 	if (cflag || !istraced)		/* just counting */
468 		*pri->sys_string = 0;
469 	else {
470 		int argprinted = FALSE;
471 		const char *name;
472 
473 		name = sysname(pri, what, raw? -1 : subcode);
474 		grow(pri, strlen(name) + 1);
475 		pri->sys_leng = snprintf(pri->sys_string, pri->sys_ssize,
476 		    "%s(", name);
477 		for (i = 0; i < nargs; i++) {
478 			arg = pri->sys_args[i];
479 			x = stp->arg[i];
480 
481 			if (!raw && pri->sys_valid &&
482 			    ((i == 0 && x == STG) ||
483 			    (i == 1 && (what == SYS_openat ||
484 			    what == SYS_openat64)))) {	/* already fetched */
485 				if (argprinted)
486 					outstring(pri, ", ");
487 				escape_string(pri, pri->sys_path);
488 				argprinted = TRUE;
489 			} else if (x != NOV && (x != HID || raw)) {
490 				if (argprinted)
491 					outstring(pri, ", ");
492 				if (x == LLO)
493 					(*Print[x])(pri, raw, arg,
494 					    pri->sys_args[++i]);
495 				else
496 					(*Print[x])(pri, raw, arg);
497 				argprinted = TRUE;
498 			}
499 		}
500 		outstring(pri, ")");
501 	}
502 
503 	return (istraced);
504 }
505 #undef	ISREAD
506 #undef	ISWRITE
507 
508 /*
509  * sysexit() returns non-zero if anything was printed.
510  */
511 int
512 sysexit(private_t *pri, int dotrace)
513 {
514 	const lwpstatus_t *Lsp = pri->lwpstat;
515 	int what = Lsp->pr_what;
516 	struct syscount *scp;
517 	const struct systable *stp;
518 	int subcode;
519 	int istraced;
520 	int raw;
521 
522 	/* protect ourself from operating system error */
523 	if (what <= 0 || what > PRMAXSYS)
524 		return (0);
525 
526 	/*
527 	 * If we aren't supposed to be tracing this one, then
528 	 * delete it from the traced signal set.  We got here
529 	 * because the process was sleeping in an untraced syscall.
530 	 */
531 	if (!prismember(&traceeven, what)) {
532 		(void) Psysexit(Proc, what, FALSE);
533 		return (0);
534 	}
535 
536 	/* pick up registers & set pri->Errno before anything else */
537 	pri->Errno = Lsp->pr_errno;
538 	pri->ErrPriv = Lsp->pr_errpriv;
539 	pri->Rval1 = Lsp->pr_rval1;
540 	pri->Rval2 = Lsp->pr_rval2;
541 
542 	switch (what) {
543 	case SYS_exit:		/* these are traced on entry */
544 	case SYS_lwp_exit:
545 	case SYS_context:
546 		istraced = dotrace && prismember(&trace, what);
547 		break;
548 	case SYS_execve:	/* this is normally traced on entry */
549 		istraced = dotrace && prismember(&trace, what);
550 		if (pri->exec_string && *pri->exec_string) {
551 			if (!cflag && istraced) { /* print exec() string now */
552 				if (pri->exec_pname[0] != '\0')
553 					(void) fputs(pri->exec_pname, stdout);
554 				timestamp(pri);
555 				(void) fputs(pri->exec_string, stdout);
556 			}
557 			pri->exec_pname[0] = '\0';
558 			pri->exec_string[0] = '\0';
559 			break;
560 		}
561 		/* FALLTHROUGH */
562 	default:
563 		/* we called sysentry() in main() for these */
564 		if (what == SYS_openat || what == SYS_openat64 ||
565 		    what == SYS_open || what == SYS_open64)
566 			istraced = dotrace && prismember(&trace, what);
567 		else
568 			istraced = sysentry(pri, dotrace) && dotrace;
569 		pri->length = 0;
570 		if (!cflag && istraced) {
571 			putpname(pri);
572 			timestamp(pri);
573 			pri->length += printf("%s", pri->sys_string);
574 		}
575 		pri->sys_leng = 0;
576 		*pri->sys_string = '\0';
577 		break;
578 	}
579 
580 	/* get systable entry for this syscall */
581 	subcode = getsubcode(pri);
582 	stp = subsys(what, subcode);
583 
584 	if (cflag && istraced) {
585 		(void) mutex_lock(&count_lock);
586 		scp = Cp->syscount[what];
587 		if (what == SYS_forksys && subcode >= 3)
588 			scp += subcode - 3;
589 		else if (subcode != -1 &&
590 		    (what != SYS_openat && what != SYS_openat64 &&
591 		    what != SYS_open && what != SYS_open64 &&
592 		    what != SYS_lwp_create))
593 			scp += subcode;
594 		scp->count++;
595 		accumulate(&scp->stime, &Lsp->pr_stime, &pri->syslast);
596 		accumulate(&Cp->usrtotal, &Lsp->pr_utime, &pri->usrlast);
597 		pri->syslast = Lsp->pr_stime;
598 		pri->usrlast = Lsp->pr_utime;
599 		(void) mutex_unlock(&count_lock);
600 	}
601 
602 	raw = prismember(&rawout, what);
603 
604 	if (!cflag && istraced) {
605 		if ((what == SYS_vfork || what == SYS_forksys) &&
606 		    pri->Errno == 0 && pri->Rval2 != 0) {
607 			pri->length &= ~07;
608 			if (strlen(sysname(pri, what, raw? -1 : subcode)) < 6) {
609 				(void) fputc('\t', stdout);
610 				pri->length += 8;
611 			}
612 			pri->length +=
613 			    7 + printf("\t(returning as child ...)");
614 		}
615 		if (what == SYS_lwp_create &&
616 		    pri->Errno == 0 && pri->Rval1 == 0) {
617 			pri->length &= ~07;
618 			pri->length +=
619 			    7 + printf("\t(returning as new lwp ...)");
620 		}
621 		if (pri->Errno != 0 || what != SYS_execve) {
622 			/* prepare to print the return code */
623 			pri->length >>= 3;
624 			if (pri->length >= 6)
625 				(void) fputc(' ', stdout);
626 			for (; pri->length < 6; pri->length++)
627 				(void) fputc('\t', stdout);
628 		}
629 	}
630 	pri->length = 0;
631 
632 	if (pri->Errno != 0) {		/* error in syscall */
633 		if (istraced) {
634 			if (cflag)
635 				scp->error++;
636 			else {
637 				const char *ename = errname(pri->Errno);
638 				const char *privname;
639 
640 				(void) printf("Err#%d", pri->Errno);
641 				if (ename != NULL) {
642 					(void) fputc(' ', stdout);
643 					(void) fputs(ename, stdout);
644 				}
645 				switch (pri->ErrPriv) {
646 				case PRIV_NONE:
647 					privname = NULL;
648 					break;
649 				case PRIV_ALL:
650 					privname = "ALL";
651 					break;
652 				case PRIV_MULTIPLE:
653 					privname = "MULTIPLE";
654 					break;
655 				case PRIV_ALLZONE:
656 					privname = "ZONE";
657 					break;
658 				default:
659 					privname = priv_getbynum(pri->ErrPriv);
660 					break;
661 				}
662 				if (privname != NULL)
663 					(void) printf(" [%s]", privname);
664 
665 				(void) fputc('\n', stdout);
666 			}
667 		}
668 	} else {
669 		/* show arguments on successful exec */
670 		if (what == SYS_execve) {
671 			if (!cflag && istraced)
672 				showargs(pri, raw);
673 		} else if (!cflag && istraced) {
674 			const char *fmt = NULL;
675 			long rv1 = pri->Rval1;
676 			long rv2 = pri->Rval2;
677 
678 #ifdef _LP64
679 			/*
680 			 * 32-bit system calls return 32-bit values. We
681 			 * later mask out the upper bits if we want to
682 			 * print these as unsigned values.
683 			 */
684 			if (data_model == PR_MODEL_ILP32) {
685 				rv1 = (int)rv1;
686 				rv2 = (int)rv2;
687 			}
688 #endif
689 
690 			switch (what) {
691 			case SYS_llseek:
692 				rv1 &= 0xffffffff;
693 				rv2 &= 0xffffffff;
694 #ifdef _LONG_LONG_LTOH	/* first long of a longlong is the low order */
695 				if (rv2 != 0) {
696 					long temp = rv1;
697 					fmt = "= 0x%lX%.8lX";
698 					rv1 = rv2;
699 					rv2 = temp;
700 					break;
701 				}
702 #else	/* the other way around */
703 				if (rv1 != 0) {
704 					fmt = "= 0x%lX%.8lX";
705 					break;
706 				}
707 				rv1 = rv2;	/* ugly */
708 #endif
709 				/* FALLTHROUGH */
710 			case SYS_lseek:
711 			case SYS_ulimit:
712 				if (rv1 & 0xff000000) {
713 #ifdef _LP64
714 					if (data_model == PR_MODEL_ILP32)
715 						rv1 &= 0xffffffff;
716 #endif
717 					fmt = "= 0x%.8lX";
718 				}
719 				break;
720 			case SYS_sigtimedwait:
721 				if (raw)
722 					/* EMPTY */;
723 				else if ((fmt = rawsigname(pri, rv1)) != NULL) {
724 					rv1 = (long)fmt;	/* filthy */
725 					fmt = "= %s";
726 				}
727 				break;
728 			case SYS_port:
729 #ifdef _LP64
730 				if (data_model == PR_MODEL_LP64) {
731 					rv2 = rv1 & 0xffffffff;
732 					rv1 = rv1 >> 32;
733 				}
734 #endif
735 				break;
736 			}
737 
738 			if (fmt == NULL) {
739 				switch (stp->rval[0]) {
740 				case HEX:
741 #ifdef _LP64
742 					if (data_model == PR_MODEL_ILP32)
743 						rv1 &= 0xffffffff;
744 #endif
745 					fmt = "= 0x%.8lX";
746 					break;
747 				case HHX:
748 #ifdef _LP64
749 					if (data_model == PR_MODEL_ILP32)
750 						rv1 &= 0xffffffff;
751 #endif
752 					fmt = "= 0x%.4lX";
753 					break;
754 				case OCT:
755 #ifdef _LP64
756 					if (data_model == PR_MODEL_ILP32)
757 						rv1 &= 0xffffffff;
758 #endif
759 					fmt = "= %#lo";
760 					break;
761 				case UNS:
762 #ifdef _LP64
763 					if (data_model == PR_MODEL_ILP32)
764 						rv1 &= 0xffffffff;
765 #endif
766 					fmt = "= %lu";
767 					break;
768 				default:
769 					fmt = "= %ld";
770 					break;
771 				}
772 			}
773 
774 			(void) printf(fmt, rv1, rv2);
775 
776 			switch (stp->rval[1]) {
777 			case NOV:
778 				fmt = NULL;
779 				break;
780 			case HEX:
781 #ifdef _LP64
782 				if (data_model == PR_MODEL_ILP32)
783 					rv2 &= 0xffffffff;
784 #endif
785 				fmt = " [0x%.8lX]";
786 				break;
787 			case HHX:
788 #ifdef _LP64
789 				if (data_model == PR_MODEL_ILP32)
790 					rv2 &= 0xffffffff;
791 #endif
792 				fmt = " [0x%.4lX]";
793 				break;
794 			case OCT:
795 #ifdef _LP64
796 				if (data_model == PR_MODEL_ILP32)
797 					rv2 &= 0xffffffff;
798 #endif
799 				fmt = " [%#lo]";
800 				break;
801 			case UNS:
802 #ifdef _LP64
803 				if (data_model == PR_MODEL_ILP32)
804 					rv2 &= 0xffffffff;
805 #endif
806 				fmt = " [%lu]";
807 				break;
808 			default:
809 				fmt = " [%ld]";
810 				break;
811 			}
812 
813 			if (fmt != NULL)
814 				(void) printf(fmt, rv2);
815 			(void) fputc('\n', stdout);
816 		}
817 
818 		if (what == SYS_vfork || what == SYS_forksys) {
819 			if (pri->Rval2 == 0)		/* child was created */
820 				pri->child = pri->Rval1;
821 			else if (cflag && istraced)	/* this is the child */
822 				scp->count--;
823 		}
824 		if (what == SYS_lwp_create && pri->Rval1 == 0 &&
825 		    cflag && istraced)		/* this is the created lwp */
826 			scp->count--;
827 	}
828 
829 #define	ISREAD(code) \
830 	((code) == SYS_read || (code) == SYS_pread || (code) == SYS_pread64 || \
831 	(code) == SYS_recv || (code) == SYS_recvfrom)
832 #define	ISWRITE(code) \
833 	((code) == SYS_write || (code) == SYS_pwrite || \
834 	(code) == SYS_pwrite64 || (code) == SYS_send || (code) == SYS_sendto)
835 
836 	if (!cflag && istraced) {
837 		int fdp1 = (int)pri->sys_args[0] + 1; /* filedescriptor + 1 */
838 
839 		if (raw) {
840 			if (what != SYS_execve)
841 				showpaths(pri, stp);
842 			if (ISREAD(what) || ISWRITE(what)) {
843 				if (pri->iob_buf[0] != '\0')
844 					(void) printf("%s     0x%.8lX: %s\n",
845 					    pri->pname, pri->sys_args[1],
846 					    pri->iob_buf);
847 			}
848 		}
849 
850 		/*
851 		 * Show buffer contents for read()/pread() or write()/pwrite().
852 		 * IOBSIZE bytes have already been shown;
853 		 * don't show them again unless there's more.
854 		 */
855 		if ((ISREAD(what) && pri->Errno == 0 &&
856 		    prismember(&readfd, fdp1)) ||
857 		    (ISWRITE(what) && prismember(&writefd, fdp1))) {
858 			long nb = ISWRITE(what) ? pri->sys_args[2] : pri->Rval1;
859 
860 			if (nb > IOBSIZE) {
861 				/* enter region of lengthy output */
862 				if (nb > MYBUFSIZ / 4)
863 					Eserialize();
864 
865 				showbuffer(pri, pri->sys_args[1], nb);
866 
867 				/* exit region of lengthy output */
868 				if (nb > MYBUFSIZ / 4)
869 					Xserialize();
870 			}
871 		}
872 #undef	ISREAD
873 #undef	ISWRITE
874 		/*
875 		 * Do verbose interpretation if requested.
876 		 * If buffer contents for read or write have been requested and
877 		 * this is a readv() or writev(), force verbose interpretation.
878 		 */
879 		if (prismember(&verbose, what) ||
880 		    ((what == SYS_readv || what == SYS_recvmsg) &&
881 		    pri->Errno == 0 && prismember(&readfd, fdp1)) ||
882 		    ((what == SYS_writev || what == SYS_sendfilev ||
883 		    what == SYS_sendmsg) &&
884 		    prismember(&writefd, fdp1)))
885 			expound(pri, pri->Rval1, raw);
886 	}
887 
888 	return (!cflag && istraced);
889 }
890 
891 void
892 showpaths(private_t *pri, const struct systable *stp)
893 {
894 	int what = pri->lwpstat->pr_what;
895 	int i;
896 
897 	for (i = 0; i < pri->sys_nargs; i++) {
898 		if (stp->arg[i] == ATC && (int)pri->sys_args[i] == AT_FDCWD) {
899 			(void) printf("%s     0x%.8X: AT_FDCWD\n",
900 			    pri->pname, AT_FDCWD);
901 		} else if ((stp->arg[i] == STG) ||
902 		    (stp->arg[i] == RST && !pri->Errno) ||
903 		    (stp->arg[i] == RLK && !pri->Errno && pri->Rval1 > 0)) {
904 			long addr = pri->sys_args[i];
905 			int maxleng =
906 			    (stp->arg[i] == RLK)? (int)pri->Rval1 : PATH_MAX;
907 			char *s;
908 
909 			if (pri->sys_valid &&
910 			    ((i == 0 && stp->arg[0] == STG) ||
911 			    (i == 1 && (what == SYS_openat ||
912 			    what == SYS_openat64))))	/* already fetched */
913 				s = pri->sys_path;
914 			else
915 				s = fetchstring(pri, addr,
916 				    maxleng > PATH_MAX ? PATH_MAX : maxleng);
917 
918 			if (s != (char *)NULL)
919 				(void) printf("%s     0x%.8lX: \"%s\"\n",
920 				    pri->pname, addr, s);
921 		}
922 	}
923 }
924 
925 /*
926  * Display arguments to successful exec().
927  */
928 void
929 showargs(private_t *pri, int raw)
930 {
931 	const lwpstatus_t *Lsp = pri->lwpstat;
932 	int nargs;
933 	long ap;
934 	int ptrsize;
935 	int fail;
936 
937 	pri->length = 0;
938 	ptrsize = (data_model == PR_MODEL_LP64)? 8 : 4;
939 
940 #if defined(__i386) || defined(__amd64)	/* XX64 */
941 	ap = (long)Lsp->pr_reg[R_SP];
942 	fail = (Pread(Proc, &nargs, sizeof (nargs), ap) != sizeof (nargs));
943 	ap += ptrsize;
944 #endif /* i386 */
945 
946 #if sparc
947 	if (data_model == PR_MODEL_LP64) {
948 		int64_t xnargs;
949 		ap = (long)(Lsp->pr_reg[R_SP]) + 16 * sizeof (int64_t)
950 		    + STACK_BIAS;
951 		fail = (Pread(Proc, &xnargs, sizeof (xnargs), ap) !=
952 		    sizeof (xnargs));
953 		nargs = (int)xnargs;
954 	} else {
955 		ap = (long)(Lsp->pr_reg[R_SP]) + 16 * sizeof (int32_t);
956 		fail = (Pread(Proc, &nargs, sizeof (nargs), ap) !=
957 		    sizeof (nargs));
958 	}
959 	ap += ptrsize;
960 #endif /* sparc */
961 
962 	if (fail) {
963 		(void) printf("\n%s\t*** Bad argument list? ***\n", pri->pname);
964 		return;
965 	}
966 
967 	(void) printf("  argc = %d\n", nargs);
968 	if (raw)
969 		showpaths(pri, &systable[SYS_execve]);
970 
971 	show_cred(pri, FALSE, FALSE);
972 
973 	if (aflag || eflag) {		/* dump args or environment */
974 
975 		/* enter region of (potentially) lengthy output */
976 		Eserialize();
977 
978 		if (aflag)		/* dump the argument list */
979 			dumpargs(pri, ap, "argv:");
980 		ap += (nargs+1) * ptrsize;
981 		if (eflag)		/* dump the environment */
982 			dumpargs(pri, ap, "envp:");
983 
984 		/* exit region of lengthy output */
985 		Xserialize();
986 	}
987 }
988 
989 void
990 dumpargs(private_t *pri, long ap, const char *str)
991 {
992 	char *string;
993 	unsigned int leng = 0;
994 	int ptrsize;
995 	long arg = 0;
996 	char *argaddr;
997 	char badaddr[32];
998 
999 	if (interrupt)
1000 		return;
1001 
1002 #ifdef _LP64
1003 	if (data_model == PR_MODEL_LP64) {
1004 		argaddr = (char *)&arg;
1005 		ptrsize = 8;
1006 	} else {
1007 #if defined(_LITTLE_ENDIAN)
1008 		argaddr = (char *)&arg;
1009 #else
1010 		argaddr = (char *)&arg + 4;
1011 #endif
1012 		ptrsize = 4;
1013 	}
1014 #else
1015 	argaddr = (char *)&arg;
1016 	ptrsize = 4;
1017 #endif
1018 	putpname(pri);
1019 	(void) fputc(' ', stdout);
1020 	(void) fputs(str, stdout);
1021 	leng += 1 + strlen(str);
1022 
1023 	while (!interrupt) {
1024 		if (Pread(Proc, argaddr, ptrsize, ap) != ptrsize) {
1025 			(void) printf("\n%s\t*** Bad argument list? ***\n",
1026 			    pri->pname);
1027 			return;
1028 		}
1029 		ap += ptrsize;
1030 
1031 		if (arg == 0)
1032 			break;
1033 		string = fetchstring(pri, arg, PATH_MAX);
1034 		if (string == NULL) {
1035 			(void) sprintf(badaddr, "BadAddress:0x%.8lX", arg);
1036 			string = badaddr;
1037 		}
1038 		if ((leng += strlen(string)) < 63) {
1039 			(void) fputc(' ', stdout);
1040 			leng++;
1041 		} else {
1042 			(void) fputc('\n', stdout);
1043 			leng = 0;
1044 			putpname(pri);
1045 			(void) fputs("  ", stdout);
1046 			leng += 2 + strlen(string);
1047 		}
1048 		(void) fputs(string, stdout);
1049 	}
1050 	(void) fputc('\n', stdout);
1051 }
1052 
1053 /*
1054  * Display contents of read() or write() buffer.
1055  */
1056 void
1057 showbuffer(private_t *pri, long offset, long count)
1058 {
1059 	char buffer[320];
1060 	int nbytes;
1061 	char *buf;
1062 	int n;
1063 
1064 	while (count > 0 && !interrupt) {
1065 		nbytes = (count < sizeof (buffer))? count : sizeof (buffer);
1066 		if ((nbytes = Pread(Proc, buffer, nbytes, offset)) <= 0)
1067 			break;
1068 		count -= nbytes;
1069 		offset += nbytes;
1070 		buf = buffer;
1071 		while (nbytes > 0 && !interrupt) {
1072 			char obuf[65];
1073 
1074 			n = (nbytes < 32)? nbytes : 32;
1075 			showbytes(buf, n, obuf);
1076 
1077 			putpname(pri);
1078 			(void) fputs("  ", stdout);
1079 			(void) fputs(obuf, stdout);
1080 			(void) fputc('\n', stdout);
1081 			nbytes -= n;
1082 			buf += n;
1083 		}
1084 	}
1085 }
1086 
1087 void
1088 showbytes(const char *buf, int n, char *obuf)
1089 {
1090 	int c;
1091 
1092 	while (--n >= 0) {
1093 		int c1 = '\\';
1094 		int c2;
1095 
1096 		switch (c = (*buf++ & 0xff)) {
1097 		case '\0':
1098 			c2 = '0';
1099 			break;
1100 		case '\b':
1101 			c2 = 'b';
1102 			break;
1103 		case '\t':
1104 			c2 = 't';
1105 			break;
1106 		case '\n':
1107 			c2 = 'n';
1108 			break;
1109 		case '\v':
1110 			c2 = 'v';
1111 			break;
1112 		case '\f':
1113 			c2 = 'f';
1114 			break;
1115 		case '\r':
1116 			c2 = 'r';
1117 			break;
1118 		default:
1119 			if (isprint(c)) {
1120 				c1 = ' ';
1121 				c2 = c;
1122 			} else {
1123 				c1 = c>>4;
1124 				c1 += (c1 < 10)? '0' : 'A'-10;
1125 				c2 = c&0xf;
1126 				c2 += (c2 < 10)? '0' : 'A'-10;
1127 			}
1128 			break;
1129 		}
1130 		*obuf++ = (char)c1;
1131 		*obuf++ = (char)c2;
1132 	}
1133 
1134 	*obuf = '\0';
1135 }
1136