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[deliverable/binutils-gdb.git] / gdb / procfs.c
1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20
21
22 /* N O T E S
23
24 For information on the details of using /proc consult section proc(4)
25 in the UNIX System V Release 4 System Administrator's Reference Manual.
26
27 The general register and floating point register sets are manipulated by
28 separate ioctl's. This file makes the assumption that if FP0_REGNUM is
29 defined, then support for the floating point register set is desired,
30 regardless of whether or not the actual target has floating point hardware.
31
32 */
33
34
35 #include "defs.h"
36
37 #include <time.h>
38 #include <sys/procfs.h>
39 #include <fcntl.h>
40 #include <errno.h>
41 #include <string.h>
42 #include <stropts.h>
43 #include <poll.h>
44
45 #include "inferior.h"
46 #include "target.h"
47 #include "command.h"
48 #include "gdbcore.h"
49
50 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
51
52 #ifndef PROC_NAME_FMT
53 #define PROC_NAME_FMT "/proc/%05d"
54 #endif
55
56 extern struct target_ops procfs_ops; /* Forward declaration */
57
58 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
59 CORE_ADDR kernel_u_addr;
60 #endif
61
62 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
63 #undef si_pid
64 #define si_pid _data._proc.pid
65 #undef si_uid
66 #define si_uid _data._proc._pdata._kill.uid
67 #endif /* BROKEN_SIGINFO_H */
68
69 /* All access to the inferior, either one started by gdb or one that has
70 been attached to, is controlled by an instance of a procinfo structure,
71 defined below. Since gdb currently only handles one inferior at a time,
72 the procinfo structure for the inferior is statically allocated and
73 only one exists at any given time. There is a separate procinfo
74 structure for use by the "info proc" command, so that we can print
75 useful information about any random process without interfering with
76 the inferior's procinfo information. */
77
78 struct procinfo {
79 struct procinfo *next;
80 int pid; /* Process ID of inferior */
81 int fd; /* File descriptor for /proc entry */
82 char *pathname; /* Pathname to /proc entry */
83 int had_event; /* poll/select says something happened */
84 int was_stopped; /* Nonzero if was stopped prior to attach */
85 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
86 prrun_t prrun; /* Control state when it is run */
87 prstatus_t prstatus; /* Current process status info */
88 gregset_t gregset; /* General register set */
89 fpregset_t fpregset; /* Floating point register set */
90 fltset_t fltset; /* Current traced hardware fault set */
91 sigset_t trace; /* Current traced signal set */
92 sysset_t exitset; /* Current traced system call exit set */
93 sysset_t entryset; /* Current traced system call entry set */
94 fltset_t saved_fltset; /* Saved traced hardware fault set */
95 sigset_t saved_trace; /* Saved traced signal set */
96 sigset_t saved_sighold; /* Saved held signal set */
97 sysset_t saved_exitset; /* Saved traced system call exit set */
98 sysset_t saved_entryset; /* Saved traced system call entry set */
99 };
100
101 /* List of inferior process information */
102 static struct procinfo *procinfo_list = NULL;
103
104 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
105
106 static int num_poll_list = 0; /* Number of entries in poll_list */
107
108 static int last_resume_pid = -1; /* Last pid used with procfs_resume */
109
110 /* Much of the information used in the /proc interface, particularly for
111 printing status information, is kept as tables of structures of the
112 following form. These tables can be used to map numeric values to
113 their symbolic names and to a string that describes their specific use. */
114
115 struct trans {
116 int value; /* The numeric value */
117 char *name; /* The equivalent symbolic value */
118 char *desc; /* Short description of value */
119 };
120
121 /* Translate bits in the pr_flags member of the prstatus structure, into the
122 names and desc information. */
123
124 static struct trans pr_flag_table[] =
125 {
126 #if defined (PR_STOPPED)
127 PR_STOPPED, "PR_STOPPED", "Process is stopped",
128 #endif
129 #if defined (PR_ISTOP)
130 PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
131 #endif
132 #if defined (PR_DSTOP)
133 PR_DSTOP, "PR_DSTOP", "A stop directive is in effect",
134 #endif
135 #if defined (PR_ASLEEP)
136 PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call",
137 #endif
138 #if defined (PR_FORK)
139 PR_FORK, "PR_FORK", "Inherit-on-fork is in effect",
140 #endif
141 #if defined (PR_RLC)
142 PR_RLC, "PR_RLC", "Run-on-last-close is in effect",
143 #endif
144 #if defined (PR_PTRACE)
145 PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace",
146 #endif
147 #if defined (PR_PCINVAL)
148 PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address",
149 #endif
150 #if defined (PR_ISSYS)
151 PR_ISSYS, "PR_ISSYS", "Is a system process",
152 #endif
153 #if defined (PR_STEP)
154 PR_STEP, "PR_STEP", "Process has single step pending",
155 #endif
156 #if defined (PR_KLC)
157 PR_KLC, "PR_KLC", "Kill-on-last-close is in effect",
158 #endif
159 #if defined (PR_ASYNC)
160 PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect",
161 #endif
162 #if defined (PR_PCOMPAT)
163 PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
164 #endif
165 0, NULL, NULL
166 };
167
168 /* Translate values in the pr_why field of the prstatus struct. */
169
170 static struct trans pr_why_table[] =
171 {
172 #if defined (PR_REQUESTED)
173 PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
174 #endif
175 #if defined (PR_SIGNALLED)
176 PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal",
177 #endif
178 #if defined (PR_FAULTED)
179 PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault",
180 #endif
181 #if defined (PR_SYSENTRY)
182 PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
183 #endif
184 #if defined (PR_SYSEXIT)
185 PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call",
186 #endif
187 #if defined (PR_JOBCONTROL)
188 PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action",
189 #endif
190 #if defined (PR_SUSPENDED)
191 PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
192 #endif
193 0, NULL, NULL
194 };
195
196 /* Hardware fault translation table. */
197
198 static struct trans faults_table[] =
199 {
200 #if defined (FLTILL)
201 FLTILL, "FLTILL", "Illegal instruction",
202 #endif
203 #if defined (FLTPRIV)
204 FLTPRIV, "FLTPRIV", "Privileged instruction",
205 #endif
206 #if defined (FLTBPT)
207 FLTBPT, "FLTBPT", "Breakpoint trap",
208 #endif
209 #if defined (FLTTRACE)
210 FLTTRACE, "FLTTRACE", "Trace trap",
211 #endif
212 #if defined (FLTACCESS)
213 FLTACCESS, "FLTACCESS", "Memory access fault",
214 #endif
215 #if defined (FLTBOUNDS)
216 FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
217 #endif
218 #if defined (FLTIOVF)
219 FLTIOVF, "FLTIOVF", "Integer overflow",
220 #endif
221 #if defined (FLTIZDIV)
222 FLTIZDIV, "FLTIZDIV", "Integer zero divide",
223 #endif
224 #if defined (FLTFPE)
225 FLTFPE, "FLTFPE", "Floating-point exception",
226 #endif
227 #if defined (FLTSTACK)
228 FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
229 #endif
230 #if defined (FLTPAGE)
231 FLTPAGE, "FLTPAGE", "Recoverable page fault",
232 #endif
233 0, NULL, NULL
234 };
235
236 /* Translation table for signal generation information. See UNIX System
237 V Release 4 Programmer's Reference Manual, siginfo(5). */
238
239 static struct sigcode {
240 int signo;
241 int code;
242 char *codename;
243 char *desc;
244 } siginfo_table[] = {
245 #if defined (SIGILL) && defined (ILL_ILLOPC)
246 SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
247 #endif
248 #if defined (SIGILL) && defined (ILL_ILLOPN)
249 SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
250 #endif
251 #if defined (SIGILL) && defined (ILL_ILLADR)
252 SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
253 #endif
254 #if defined (SIGILL) && defined (ILL_ILLTRP)
255 SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
256 #endif
257 #if defined (SIGILL) && defined (ILL_PRVOPC)
258 SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
259 #endif
260 #if defined (SIGILL) && defined (ILL_PRVREG)
261 SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
262 #endif
263 #if defined (SIGILL) && defined (ILL_COPROC)
264 SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
265 #endif
266 #if defined (SIGILL) && defined (ILL_BADSTK)
267 SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
268 #endif
269 #if defined (SIGFPE) && defined (FPE_INTDIV)
270 SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
271 #endif
272 #if defined (SIGFPE) && defined (FPE_INTOVF)
273 SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
274 #endif
275 #if defined (SIGFPE) && defined (FPE_FLTDIV)
276 SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
277 #endif
278 #if defined (SIGFPE) && defined (FPE_FLTOVF)
279 SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow",
280 #endif
281 #if defined (SIGFPE) && defined (FPE_FLTUND)
282 SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
283 #endif
284 #if defined (SIGFPE) && defined (FPE_FLTRES)
285 SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
286 #endif
287 #if defined (SIGFPE) && defined (FPE_FLTINV)
288 SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation",
289 #endif
290 #if defined (SIGFPE) && defined (FPE_FLTSUB)
291 SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range",
292 #endif
293 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
294 SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object",
295 #endif
296 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
297 SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object",
298 #endif
299 #if defined (SIGBUS) && defined (BUS_ADRALN)
300 SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
301 #endif
302 #if defined (SIGBUS) && defined (BUS_ADRERR)
303 SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
304 #endif
305 #if defined (SIGBUS) && defined (BUS_OBJERR)
306 SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error",
307 #endif
308 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
309 SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
310 #endif
311 #if defined (SIGTRAP) && defined (TRAP_TRACE)
312 SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
313 #endif
314 #if defined (SIGCLD) && defined (CLD_EXITED)
315 SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
316 #endif
317 #if defined (SIGCLD) && defined (CLD_KILLED)
318 SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed",
319 #endif
320 #if defined (SIGCLD) && defined (CLD_DUMPED)
321 SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally",
322 #endif
323 #if defined (SIGCLD) && defined (CLD_TRAPPED)
324 SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped",
325 #endif
326 #if defined (SIGCLD) && defined (CLD_STOPPED)
327 SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped",
328 #endif
329 #if defined (SIGCLD) && defined (CLD_CONTINUED)
330 SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued",
331 #endif
332 #if defined (SIGPOLL) && defined (POLL_IN)
333 SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
334 #endif
335 #if defined (SIGPOLL) && defined (POLL_OUT)
336 SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
337 #endif
338 #if defined (SIGPOLL) && defined (POLL_MSG)
339 SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
340 #endif
341 #if defined (SIGPOLL) && defined (POLL_ERR)
342 SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
343 #endif
344 #if defined (SIGPOLL) && defined (POLL_PRI)
345 SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
346 #endif
347 #if defined (SIGPOLL) && defined (POLL_HUP)
348 SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
349 #endif
350 0, 0, NULL, NULL
351 };
352
353 static char *syscall_table[MAX_SYSCALLS];
354
355 /* Prototypes for local functions */
356
357 static void
358 set_proc_siginfo PARAMS ((struct procinfo *, int));
359
360 static void
361 init_syscall_table PARAMS ((void));
362
363 static char *
364 syscallname PARAMS ((int));
365
366 static char *
367 signalname PARAMS ((int));
368
369 static char *
370 errnoname PARAMS ((int));
371
372 static int
373 proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
374
375 static int
376 open_proc_file PARAMS ((int, struct procinfo *, int));
377
378 static void
379 close_proc_file PARAMS ((struct procinfo *));
380
381 static void
382 unconditionally_kill_inferior PARAMS ((struct procinfo *));
383
384 static NORETURN void
385 proc_init_failed PARAMS ((struct procinfo *, char *));
386
387 static void
388 info_proc PARAMS ((char *, int));
389
390 static void
391 info_proc_flags PARAMS ((struct procinfo *, int));
392
393 static void
394 info_proc_stop PARAMS ((struct procinfo *, int));
395
396 static void
397 info_proc_siginfo PARAMS ((struct procinfo *, int));
398
399 static void
400 info_proc_syscalls PARAMS ((struct procinfo *, int));
401
402 static void
403 info_proc_mappings PARAMS ((struct procinfo *, int));
404
405 static void
406 info_proc_signals PARAMS ((struct procinfo *, int));
407
408 static void
409 info_proc_faults PARAMS ((struct procinfo *, int));
410
411 static char *
412 mappingflags PARAMS ((long));
413
414 static char *
415 lookupname PARAMS ((struct trans *, unsigned int, char *));
416
417 static char *
418 lookupdesc PARAMS ((struct trans *, unsigned int));
419
420 static int
421 do_attach PARAMS ((int pid));
422
423 static void
424 do_detach PARAMS ((int siggnal));
425
426 static void
427 procfs_create_inferior PARAMS ((char *, char *, char **));
428
429 static void
430 procfs_notice_signals PARAMS ((int pid));
431
432 static struct procinfo *
433 find_procinfo PARAMS ((pid_t pid, int okfail));
434
435 /* External function prototypes that can't be easily included in any
436 header file because the args are typedefs in system include files. */
437
438 extern void
439 supply_gregset PARAMS ((gregset_t *));
440
441 extern void
442 fill_gregset PARAMS ((gregset_t *, int));
443
444 extern void
445 supply_fpregset PARAMS ((fpregset_t *));
446
447 extern void
448 fill_fpregset PARAMS ((fpregset_t *, int));
449
450 /*
451
452 LOCAL FUNCTION
453
454 find_procinfo -- convert a process id to a struct procinfo
455
456 SYNOPSIS
457
458 static struct procinfo * find_procinfo (pid_t pid, int okfail);
459
460 DESCRIPTION
461
462 Given a process id, look it up in the procinfo chain. Returns
463 a struct procinfo *. If can't find pid, then call error(),
464 unless okfail is set, in which case, return NULL;
465 */
466
467 static struct procinfo *
468 find_procinfo (pid, okfail)
469 pid_t pid;
470 int okfail;
471 {
472 struct procinfo *procinfo;
473
474 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
475 if (procinfo->pid == pid)
476 return procinfo;
477
478 if (okfail)
479 return NULL;
480
481 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
482 }
483
484 /*
485
486 LOCAL MACRO
487
488 current_procinfo -- convert inferior_pid to a struct procinfo
489
490 SYNOPSIS
491
492 static struct procinfo * current_procinfo;
493
494 DESCRIPTION
495
496 Looks up inferior_pid in the procinfo chain. Always returns a
497 struct procinfo *. If process can't be found, we error() out.
498 */
499
500 #define current_procinfo find_procinfo (inferior_pid, 0)
501
502 /*
503
504 LOCAL FUNCTION
505
506 add_fd -- Add the fd to the poll/select list
507
508 SYNOPSIS
509
510 static void add_fd (struct procinfo *);
511
512 DESCRIPTION
513
514 Add the fd of the supplied procinfo to the list of fds used for
515 poll/select operations.
516 */
517
518 static void
519 add_fd (pi)
520 struct procinfo *pi;
521 {
522 if (num_poll_list <= 0)
523 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
524 else
525 poll_list = (struct pollfd *) xrealloc (poll_list,
526 (num_poll_list + 1)
527 * sizeof (struct pollfd));
528 poll_list[num_poll_list].fd = pi->fd;
529 poll_list[num_poll_list].events = POLLPRI;
530
531 num_poll_list++;
532 }
533
534 static void
535 remove_fd (pi)
536 struct procinfo *pi;
537 {
538 int i;
539
540 for (i = 0; i < num_poll_list; i++)
541 {
542 if (poll_list[i].fd == pi->fd)
543 {
544 if (i != num_poll_list - 1)
545 memcpy (poll_list, poll_list + i + 1,
546 (num_poll_list - i - 1) * sizeof (struct pollfd));
547
548 num_poll_list--;
549
550 if (num_poll_list == 0)
551 free (poll_list);
552 else
553 poll_list = (struct pollfd *) xrealloc (poll_list,
554 num_poll_list
555 * sizeof (struct pollfd));
556 return;
557 }
558 }
559 }
560
561 #define LOSING_POLL unixware_sux
562
563 static struct procinfo *
564 wait_fd ()
565 {
566 struct procinfo *pi;
567 int num_fds;
568 int i;
569
570 if (attach_flag)
571 set_sigint_trap (); /* Causes SIGINT to be passed on to the
572 attached process. */
573
574 #ifndef LOSING_POLL
575 num_fds = poll (poll_list, num_poll_list, -1);
576 #else
577 pi = current_procinfo;
578
579 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
580 {
581 print_sys_errmsg (pi->pathname, errno);
582 error ("PIOCWSTOP failed");
583 }
584 pi->had_event = 1;
585 #endif
586
587 if (attach_flag)
588 clear_sigint_trap();
589
590 #ifndef LOSING_POLL
591
592 if (num_fds <= 0)
593 {
594 print_sys_errmsg ("poll failed\n", errno);
595 error ("Poll failed, returned %d", num_fds);
596 }
597
598 for (i = 0; i < num_poll_list && num_fds > 0; i++)
599 {
600 if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
601 continue;
602 for (pi = procinfo_list; pi; pi = pi->next)
603 {
604 if (poll_list[i].fd == pi->fd)
605 {
606 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
607 {
608 print_sys_errmsg (pi->pathname, errno);
609 error ("PIOCSTATUS failed");
610 }
611 num_fds--;
612 pi->had_event = 1;
613 break;
614 }
615 }
616 if (!pi)
617 error ("procfs_wait: Couldn't find procinfo for fd %d\n",
618 poll_list[i].fd);
619 }
620 #endif /* LOSING_POLL */
621
622 return pi;
623 }
624
625 /*
626
627 LOCAL FUNCTION
628
629 lookupdesc -- translate a value to a summary desc string
630
631 SYNOPSIS
632
633 static char *lookupdesc (struct trans *transp, unsigned int val);
634
635 DESCRIPTION
636
637 Given a pointer to a translation table and a value to be translated,
638 lookup the desc string and return it.
639 */
640
641 static char *
642 lookupdesc (transp, val)
643 struct trans *transp;
644 unsigned int val;
645 {
646 char *desc;
647
648 for (desc = NULL; transp -> name != NULL; transp++)
649 {
650 if (transp -> value == val)
651 {
652 desc = transp -> desc;
653 break;
654 }
655 }
656
657 /* Didn't find a translation for the specified value, set a default one. */
658
659 if (desc == NULL)
660 {
661 desc = "Unknown";
662 }
663 return (desc);
664 }
665
666 /*
667
668 LOCAL FUNCTION
669
670 lookupname -- translate a value to symbolic name
671
672 SYNOPSIS
673
674 static char *lookupname (struct trans *transp, unsigned int val,
675 char *prefix);
676
677 DESCRIPTION
678
679 Given a pointer to a translation table, a value to be translated,
680 and a default prefix to return if the value can't be translated,
681 match the value with one of the translation table entries and
682 return a pointer to the symbolic name.
683
684 If no match is found it just returns the value as a printable string,
685 with the given prefix. The previous such value, if any, is freed
686 at this time.
687 */
688
689 static char *
690 lookupname (transp, val, prefix)
691 struct trans *transp;
692 unsigned int val;
693 char *prefix;
694 {
695 static char *locbuf;
696 char *name;
697
698 for (name = NULL; transp -> name != NULL; transp++)
699 {
700 if (transp -> value == val)
701 {
702 name = transp -> name;
703 break;
704 }
705 }
706
707 /* Didn't find a translation for the specified value, build a default
708 one using the specified prefix and return it. The lifetime of
709 the value is only until the next one is needed. */
710
711 if (name == NULL)
712 {
713 if (locbuf != NULL)
714 {
715 free (locbuf);
716 }
717 locbuf = xmalloc (strlen (prefix) + 16);
718 sprintf (locbuf, "%s %u", prefix, val);
719 name = locbuf;
720 }
721 return (name);
722 }
723
724 static char *
725 sigcodename (sip)
726 siginfo_t *sip;
727 {
728 struct sigcode *scp;
729 char *name = NULL;
730 static char locbuf[32];
731
732 for (scp = siginfo_table; scp -> codename != NULL; scp++)
733 {
734 if ((scp -> signo == sip -> si_signo) &&
735 (scp -> code == sip -> si_code))
736 {
737 name = scp -> codename;
738 break;
739 }
740 }
741 if (name == NULL)
742 {
743 sprintf (locbuf, "sigcode %u", sip -> si_signo);
744 name = locbuf;
745 }
746 return (name);
747 }
748
749 static char *
750 sigcodedesc (sip)
751 siginfo_t *sip;
752 {
753 struct sigcode *scp;
754 char *desc = NULL;
755
756 for (scp = siginfo_table; scp -> codename != NULL; scp++)
757 {
758 if ((scp -> signo == sip -> si_signo) &&
759 (scp -> code == sip -> si_code))
760 {
761 desc = scp -> desc;
762 break;
763 }
764 }
765 if (desc == NULL)
766 {
767 desc = "Unrecognized signal or trap use";
768 }
769 return (desc);
770 }
771
772 /*
773
774 LOCAL FUNCTION
775
776 syscallname - translate a system call number into a system call name
777
778 SYNOPSIS
779
780 char *syscallname (int syscallnum)
781
782 DESCRIPTION
783
784 Given a system call number, translate it into the printable name
785 of a system call, or into "syscall <num>" if it is an unknown
786 number.
787 */
788
789 static char *
790 syscallname (syscallnum)
791 int syscallnum;
792 {
793 static char locbuf[32];
794 char *rtnval;
795
796 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
797 {
798 rtnval = syscall_table[syscallnum];
799 }
800 else
801 {
802 sprintf (locbuf, "syscall %u", syscallnum);
803 rtnval = locbuf;
804 }
805 return (rtnval);
806 }
807
808 /*
809
810 LOCAL FUNCTION
811
812 init_syscall_table - initialize syscall translation table
813
814 SYNOPSIS
815
816 void init_syscall_table (void)
817
818 DESCRIPTION
819
820 Dynamically initialize the translation table to convert system
821 call numbers into printable system call names. Done once per
822 gdb run, on initialization.
823
824 NOTES
825
826 This is awfully ugly, but preprocessor tricks to make it prettier
827 tend to be nonportable.
828 */
829
830 static void
831 init_syscall_table ()
832 {
833 #if defined (SYS_exit)
834 syscall_table[SYS_exit] = "exit";
835 #endif
836 #if defined (SYS_fork)
837 syscall_table[SYS_fork] = "fork";
838 #endif
839 #if defined (SYS_read)
840 syscall_table[SYS_read] = "read";
841 #endif
842 #if defined (SYS_write)
843 syscall_table[SYS_write] = "write";
844 #endif
845 #if defined (SYS_open)
846 syscall_table[SYS_open] = "open";
847 #endif
848 #if defined (SYS_close)
849 syscall_table[SYS_close] = "close";
850 #endif
851 #if defined (SYS_wait)
852 syscall_table[SYS_wait] = "wait";
853 #endif
854 #if defined (SYS_creat)
855 syscall_table[SYS_creat] = "creat";
856 #endif
857 #if defined (SYS_link)
858 syscall_table[SYS_link] = "link";
859 #endif
860 #if defined (SYS_unlink)
861 syscall_table[SYS_unlink] = "unlink";
862 #endif
863 #if defined (SYS_exec)
864 syscall_table[SYS_exec] = "exec";
865 #endif
866 #if defined (SYS_execv)
867 syscall_table[SYS_execv] = "execv";
868 #endif
869 #if defined (SYS_execve)
870 syscall_table[SYS_execve] = "execve";
871 #endif
872 #if defined (SYS_chdir)
873 syscall_table[SYS_chdir] = "chdir";
874 #endif
875 #if defined (SYS_time)
876 syscall_table[SYS_time] = "time";
877 #endif
878 #if defined (SYS_mknod)
879 syscall_table[SYS_mknod] = "mknod";
880 #endif
881 #if defined (SYS_chmod)
882 syscall_table[SYS_chmod] = "chmod";
883 #endif
884 #if defined (SYS_chown)
885 syscall_table[SYS_chown] = "chown";
886 #endif
887 #if defined (SYS_brk)
888 syscall_table[SYS_brk] = "brk";
889 #endif
890 #if defined (SYS_stat)
891 syscall_table[SYS_stat] = "stat";
892 #endif
893 #if defined (SYS_lseek)
894 syscall_table[SYS_lseek] = "lseek";
895 #endif
896 #if defined (SYS_getpid)
897 syscall_table[SYS_getpid] = "getpid";
898 #endif
899 #if defined (SYS_mount)
900 syscall_table[SYS_mount] = "mount";
901 #endif
902 #if defined (SYS_umount)
903 syscall_table[SYS_umount] = "umount";
904 #endif
905 #if defined (SYS_setuid)
906 syscall_table[SYS_setuid] = "setuid";
907 #endif
908 #if defined (SYS_getuid)
909 syscall_table[SYS_getuid] = "getuid";
910 #endif
911 #if defined (SYS_stime)
912 syscall_table[SYS_stime] = "stime";
913 #endif
914 #if defined (SYS_ptrace)
915 syscall_table[SYS_ptrace] = "ptrace";
916 #endif
917 #if defined (SYS_alarm)
918 syscall_table[SYS_alarm] = "alarm";
919 #endif
920 #if defined (SYS_fstat)
921 syscall_table[SYS_fstat] = "fstat";
922 #endif
923 #if defined (SYS_pause)
924 syscall_table[SYS_pause] = "pause";
925 #endif
926 #if defined (SYS_utime)
927 syscall_table[SYS_utime] = "utime";
928 #endif
929 #if defined (SYS_stty)
930 syscall_table[SYS_stty] = "stty";
931 #endif
932 #if defined (SYS_gtty)
933 syscall_table[SYS_gtty] = "gtty";
934 #endif
935 #if defined (SYS_access)
936 syscall_table[SYS_access] = "access";
937 #endif
938 #if defined (SYS_nice)
939 syscall_table[SYS_nice] = "nice";
940 #endif
941 #if defined (SYS_statfs)
942 syscall_table[SYS_statfs] = "statfs";
943 #endif
944 #if defined (SYS_sync)
945 syscall_table[SYS_sync] = "sync";
946 #endif
947 #if defined (SYS_kill)
948 syscall_table[SYS_kill] = "kill";
949 #endif
950 #if defined (SYS_fstatfs)
951 syscall_table[SYS_fstatfs] = "fstatfs";
952 #endif
953 #if defined (SYS_pgrpsys)
954 syscall_table[SYS_pgrpsys] = "pgrpsys";
955 #endif
956 #if defined (SYS_xenix)
957 syscall_table[SYS_xenix] = "xenix";
958 #endif
959 #if defined (SYS_dup)
960 syscall_table[SYS_dup] = "dup";
961 #endif
962 #if defined (SYS_pipe)
963 syscall_table[SYS_pipe] = "pipe";
964 #endif
965 #if defined (SYS_times)
966 syscall_table[SYS_times] = "times";
967 #endif
968 #if defined (SYS_profil)
969 syscall_table[SYS_profil] = "profil";
970 #endif
971 #if defined (SYS_plock)
972 syscall_table[SYS_plock] = "plock";
973 #endif
974 #if defined (SYS_setgid)
975 syscall_table[SYS_setgid] = "setgid";
976 #endif
977 #if defined (SYS_getgid)
978 syscall_table[SYS_getgid] = "getgid";
979 #endif
980 #if defined (SYS_signal)
981 syscall_table[SYS_signal] = "signal";
982 #endif
983 #if defined (SYS_msgsys)
984 syscall_table[SYS_msgsys] = "msgsys";
985 #endif
986 #if defined (SYS_sys3b)
987 syscall_table[SYS_sys3b] = "sys3b";
988 #endif
989 #if defined (SYS_acct)
990 syscall_table[SYS_acct] = "acct";
991 #endif
992 #if defined (SYS_shmsys)
993 syscall_table[SYS_shmsys] = "shmsys";
994 #endif
995 #if defined (SYS_semsys)
996 syscall_table[SYS_semsys] = "semsys";
997 #endif
998 #if defined (SYS_ioctl)
999 syscall_table[SYS_ioctl] = "ioctl";
1000 #endif
1001 #if defined (SYS_uadmin)
1002 syscall_table[SYS_uadmin] = "uadmin";
1003 #endif
1004 #if defined (SYS_utssys)
1005 syscall_table[SYS_utssys] = "utssys";
1006 #endif
1007 #if defined (SYS_fsync)
1008 syscall_table[SYS_fsync] = "fsync";
1009 #endif
1010 #if defined (SYS_umask)
1011 syscall_table[SYS_umask] = "umask";
1012 #endif
1013 #if defined (SYS_chroot)
1014 syscall_table[SYS_chroot] = "chroot";
1015 #endif
1016 #if defined (SYS_fcntl)
1017 syscall_table[SYS_fcntl] = "fcntl";
1018 #endif
1019 #if defined (SYS_ulimit)
1020 syscall_table[SYS_ulimit] = "ulimit";
1021 #endif
1022 #if defined (SYS_rfsys)
1023 syscall_table[SYS_rfsys] = "rfsys";
1024 #endif
1025 #if defined (SYS_rmdir)
1026 syscall_table[SYS_rmdir] = "rmdir";
1027 #endif
1028 #if defined (SYS_mkdir)
1029 syscall_table[SYS_mkdir] = "mkdir";
1030 #endif
1031 #if defined (SYS_getdents)
1032 syscall_table[SYS_getdents] = "getdents";
1033 #endif
1034 #if defined (SYS_sysfs)
1035 syscall_table[SYS_sysfs] = "sysfs";
1036 #endif
1037 #if defined (SYS_getmsg)
1038 syscall_table[SYS_getmsg] = "getmsg";
1039 #endif
1040 #if defined (SYS_putmsg)
1041 syscall_table[SYS_putmsg] = "putmsg";
1042 #endif
1043 #if defined (SYS_poll)
1044 syscall_table[SYS_poll] = "poll";
1045 #endif
1046 #if defined (SYS_lstat)
1047 syscall_table[SYS_lstat] = "lstat";
1048 #endif
1049 #if defined (SYS_symlink)
1050 syscall_table[SYS_symlink] = "symlink";
1051 #endif
1052 #if defined (SYS_readlink)
1053 syscall_table[SYS_readlink] = "readlink";
1054 #endif
1055 #if defined (SYS_setgroups)
1056 syscall_table[SYS_setgroups] = "setgroups";
1057 #endif
1058 #if defined (SYS_getgroups)
1059 syscall_table[SYS_getgroups] = "getgroups";
1060 #endif
1061 #if defined (SYS_fchmod)
1062 syscall_table[SYS_fchmod] = "fchmod";
1063 #endif
1064 #if defined (SYS_fchown)
1065 syscall_table[SYS_fchown] = "fchown";
1066 #endif
1067 #if defined (SYS_sigprocmask)
1068 syscall_table[SYS_sigprocmask] = "sigprocmask";
1069 #endif
1070 #if defined (SYS_sigsuspend)
1071 syscall_table[SYS_sigsuspend] = "sigsuspend";
1072 #endif
1073 #if defined (SYS_sigaltstack)
1074 syscall_table[SYS_sigaltstack] = "sigaltstack";
1075 #endif
1076 #if defined (SYS_sigaction)
1077 syscall_table[SYS_sigaction] = "sigaction";
1078 #endif
1079 #if defined (SYS_sigpending)
1080 syscall_table[SYS_sigpending] = "sigpending";
1081 #endif
1082 #if defined (SYS_context)
1083 syscall_table[SYS_context] = "context";
1084 #endif
1085 #if defined (SYS_evsys)
1086 syscall_table[SYS_evsys] = "evsys";
1087 #endif
1088 #if defined (SYS_evtrapret)
1089 syscall_table[SYS_evtrapret] = "evtrapret";
1090 #endif
1091 #if defined (SYS_statvfs)
1092 syscall_table[SYS_statvfs] = "statvfs";
1093 #endif
1094 #if defined (SYS_fstatvfs)
1095 syscall_table[SYS_fstatvfs] = "fstatvfs";
1096 #endif
1097 #if defined (SYS_nfssys)
1098 syscall_table[SYS_nfssys] = "nfssys";
1099 #endif
1100 #if defined (SYS_waitsys)
1101 syscall_table[SYS_waitsys] = "waitsys";
1102 #endif
1103 #if defined (SYS_sigsendsys)
1104 syscall_table[SYS_sigsendsys] = "sigsendsys";
1105 #endif
1106 #if defined (SYS_hrtsys)
1107 syscall_table[SYS_hrtsys] = "hrtsys";
1108 #endif
1109 #if defined (SYS_acancel)
1110 syscall_table[SYS_acancel] = "acancel";
1111 #endif
1112 #if defined (SYS_async)
1113 syscall_table[SYS_async] = "async";
1114 #endif
1115 #if defined (SYS_priocntlsys)
1116 syscall_table[SYS_priocntlsys] = "priocntlsys";
1117 #endif
1118 #if defined (SYS_pathconf)
1119 syscall_table[SYS_pathconf] = "pathconf";
1120 #endif
1121 #if defined (SYS_mincore)
1122 syscall_table[SYS_mincore] = "mincore";
1123 #endif
1124 #if defined (SYS_mmap)
1125 syscall_table[SYS_mmap] = "mmap";
1126 #endif
1127 #if defined (SYS_mprotect)
1128 syscall_table[SYS_mprotect] = "mprotect";
1129 #endif
1130 #if defined (SYS_munmap)
1131 syscall_table[SYS_munmap] = "munmap";
1132 #endif
1133 #if defined (SYS_fpathconf)
1134 syscall_table[SYS_fpathconf] = "fpathconf";
1135 #endif
1136 #if defined (SYS_vfork)
1137 syscall_table[SYS_vfork] = "vfork";
1138 #endif
1139 #if defined (SYS_fchdir)
1140 syscall_table[SYS_fchdir] = "fchdir";
1141 #endif
1142 #if defined (SYS_readv)
1143 syscall_table[SYS_readv] = "readv";
1144 #endif
1145 #if defined (SYS_writev)
1146 syscall_table[SYS_writev] = "writev";
1147 #endif
1148 #if defined (SYS_xstat)
1149 syscall_table[SYS_xstat] = "xstat";
1150 #endif
1151 #if defined (SYS_lxstat)
1152 syscall_table[SYS_lxstat] = "lxstat";
1153 #endif
1154 #if defined (SYS_fxstat)
1155 syscall_table[SYS_fxstat] = "fxstat";
1156 #endif
1157 #if defined (SYS_xmknod)
1158 syscall_table[SYS_xmknod] = "xmknod";
1159 #endif
1160 #if defined (SYS_clocal)
1161 syscall_table[SYS_clocal] = "clocal";
1162 #endif
1163 #if defined (SYS_setrlimit)
1164 syscall_table[SYS_setrlimit] = "setrlimit";
1165 #endif
1166 #if defined (SYS_getrlimit)
1167 syscall_table[SYS_getrlimit] = "getrlimit";
1168 #endif
1169 #if defined (SYS_lchown)
1170 syscall_table[SYS_lchown] = "lchown";
1171 #endif
1172 #if defined (SYS_memcntl)
1173 syscall_table[SYS_memcntl] = "memcntl";
1174 #endif
1175 #if defined (SYS_getpmsg)
1176 syscall_table[SYS_getpmsg] = "getpmsg";
1177 #endif
1178 #if defined (SYS_putpmsg)
1179 syscall_table[SYS_putpmsg] = "putpmsg";
1180 #endif
1181 #if defined (SYS_rename)
1182 syscall_table[SYS_rename] = "rename";
1183 #endif
1184 #if defined (SYS_uname)
1185 syscall_table[SYS_uname] = "uname";
1186 #endif
1187 #if defined (SYS_setegid)
1188 syscall_table[SYS_setegid] = "setegid";
1189 #endif
1190 #if defined (SYS_sysconfig)
1191 syscall_table[SYS_sysconfig] = "sysconfig";
1192 #endif
1193 #if defined (SYS_adjtime)
1194 syscall_table[SYS_adjtime] = "adjtime";
1195 #endif
1196 #if defined (SYS_systeminfo)
1197 syscall_table[SYS_systeminfo] = "systeminfo";
1198 #endif
1199 #if defined (SYS_seteuid)
1200 syscall_table[SYS_seteuid] = "seteuid";
1201 #endif
1202 #if defined (SYS_sproc)
1203 syscall_table[SYS_sproc] = "sproc";
1204 #endif
1205 }
1206
1207 /*
1208
1209 GLOBAL FUNCTION
1210
1211 ptrace -- override library version to force errors for /proc version
1212
1213 SYNOPSIS
1214
1215 int ptrace (int request, int pid, PTRACE_ARG3_TYPE arg3, int arg4)
1216
1217 DESCRIPTION
1218
1219 When gdb is configured to use /proc, it should not be calling
1220 or otherwise attempting to use ptrace. In order to catch errors
1221 where use of /proc is configured, but some routine is still calling
1222 ptrace, we provide a local version of a function with that name
1223 that does nothing but issue an error message.
1224 */
1225
1226 int
1227 ptrace (request, pid, arg3, arg4)
1228 int request;
1229 int pid;
1230 PTRACE_ARG3_TYPE arg3;
1231 int arg4;
1232 {
1233 error ("internal error - there is a call to ptrace() somewhere");
1234 /*NOTREACHED*/
1235 }
1236
1237 /*
1238
1239 LOCAL FUNCTION
1240
1241 procfs_kill_inferior - kill any currently inferior
1242
1243 SYNOPSIS
1244
1245 void procfs_kill_inferior (void)
1246
1247 DESCRIPTION
1248
1249 Kill any current inferior.
1250
1251 NOTES
1252
1253 Kills even attached inferiors. Presumably the user has already
1254 been prompted that the inferior is an attached one rather than
1255 one started by gdb. (FIXME?)
1256
1257 */
1258
1259 static void
1260 procfs_kill_inferior ()
1261 {
1262 target_mourn_inferior ();
1263 }
1264
1265 /*
1266
1267 LOCAL FUNCTION
1268
1269 unconditionally_kill_inferior - terminate the inferior
1270
1271 SYNOPSIS
1272
1273 static void unconditionally_kill_inferior (struct procinfo *)
1274
1275 DESCRIPTION
1276
1277 Kill the specified inferior.
1278
1279 NOTE
1280
1281 A possibly useful enhancement would be to first try sending
1282 the inferior a terminate signal, politely asking it to commit
1283 suicide, before we murder it (we could call that
1284 politely_kill_inferior()).
1285
1286 */
1287
1288 static void
1289 unconditionally_kill_inferior (pi)
1290 struct procinfo *pi;
1291 {
1292 int signo;
1293 int ppid;
1294
1295 ppid = pi->prstatus.pr_ppid;
1296
1297 signo = SIGKILL;
1298 ioctl (pi->fd, PIOCKILL, &signo);
1299 close_proc_file (pi);
1300
1301 /* Only wait() for our direct children. Our grandchildren zombies are killed
1302 by the death of their parents. */
1303
1304 if (ppid == getpid())
1305 wait ((int *) 0);
1306 }
1307
1308 /*
1309
1310 LOCAL FUNCTION
1311
1312 procfs_xfer_memory -- copy data to or from inferior memory space
1313
1314 SYNOPSIS
1315
1316 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1317 int dowrite, struct target_ops target)
1318
1319 DESCRIPTION
1320
1321 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1322 from/to debugger memory starting at MYADDR. Copy from inferior
1323 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1324
1325 Returns the length copied, which is either the LEN argument or
1326 zero. This xfer function does not do partial moves, since procfs_ops
1327 doesn't allow memory operations to cross below us in the target stack
1328 anyway.
1329
1330 NOTES
1331
1332 The /proc interface makes this an almost trivial task.
1333 */
1334
1335 static int
1336 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1337 CORE_ADDR memaddr;
1338 char *myaddr;
1339 int len;
1340 int dowrite;
1341 struct target_ops *target; /* ignored */
1342 {
1343 int nbytes = 0;
1344 struct procinfo *pi;
1345
1346 pi = current_procinfo;
1347
1348 if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
1349 {
1350 if (dowrite)
1351 {
1352 nbytes = write (pi->fd, myaddr, len);
1353 }
1354 else
1355 {
1356 nbytes = read (pi->fd, myaddr, len);
1357 }
1358 if (nbytes < 0)
1359 {
1360 nbytes = 0;
1361 }
1362 }
1363 return (nbytes);
1364 }
1365
1366 /*
1367
1368 LOCAL FUNCTION
1369
1370 procfs_store_registers -- copy register values back to inferior
1371
1372 SYNOPSIS
1373
1374 void procfs_store_registers (int regno)
1375
1376 DESCRIPTION
1377
1378 Store our current register values back into the inferior. If
1379 REGNO is -1 then store all the register, otherwise store just
1380 the value specified by REGNO.
1381
1382 NOTES
1383
1384 If we are storing only a single register, we first have to get all
1385 the current values from the process, overwrite the desired register
1386 in the gregset with the one we want from gdb's registers, and then
1387 send the whole set back to the process. For writing all the
1388 registers, all we have to do is generate the gregset and send it to
1389 the process.
1390
1391 Also note that the process has to be stopped on an event of interest
1392 for this to work, which basically means that it has to have been
1393 run under the control of one of the other /proc ioctl calls and not
1394 ptrace. Since we don't use ptrace anyway, we don't worry about this
1395 fine point, but it is worth noting for future reference.
1396
1397 Gdb is confused about what this function is supposed to return.
1398 Some versions return a value, others return nothing. Some are
1399 declared to return a value and actually return nothing. Gdb ignores
1400 anything returned. (FIXME)
1401
1402 */
1403
1404 static void
1405 procfs_store_registers (regno)
1406 int regno;
1407 {
1408 struct procinfo *pi;
1409
1410 pi = current_procinfo;
1411
1412 if (regno != -1)
1413 {
1414 ioctl (pi->fd, PIOCGREG, &pi->gregset);
1415 }
1416 fill_gregset (&pi->gregset, regno);
1417 ioctl (pi->fd, PIOCSREG, &pi->gregset);
1418
1419 #if defined (FP0_REGNUM)
1420
1421 /* Now repeat everything using the floating point register set, if the
1422 target has floating point hardware. Since we ignore the returned value,
1423 we'll never know whether it worked or not anyway. */
1424
1425 if (regno != -1)
1426 {
1427 ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
1428 }
1429 fill_fpregset (&pi->fpregset, regno);
1430 ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
1431
1432 #endif /* FP0_REGNUM */
1433
1434 }
1435
1436 /*
1437
1438 LOCAL FUNCTION
1439
1440 create_procinfo - initialize access to a /proc entry
1441
1442 SYNOPSIS
1443
1444 void create_procinfo (int pid)
1445
1446 DESCRIPTION
1447
1448 Allocate a procinfo structure, open the /proc file and then sets up
1449 the set of signals and faults that are to be traced.
1450
1451 NOTES
1452
1453 If proc_init_failed ever gets called, control returns to the command
1454 processing loop via the standard error handling code.
1455
1456 */
1457
1458 static void
1459 create_procinfo (pid)
1460 int pid;
1461 {
1462 struct procinfo *pi;
1463
1464 if (find_procinfo (pid, 1))
1465 return; /* All done! It already exists */
1466
1467 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1468
1469 if (!open_proc_file (pid, pi, O_RDWR))
1470 proc_init_failed (pi, "can't open process file");
1471
1472 /* Add new process to process info list */
1473
1474 pi->next = procinfo_list;
1475 procinfo_list = pi;
1476
1477 add_fd (pi); /* Add to list for poll/select */
1478
1479 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
1480 prfillset (&pi->prrun.pr_trace);
1481 procfs_notice_signals (pid);
1482 prfillset (&pi->prrun.pr_fault);
1483 prdelset (&pi->prrun.pr_fault, FLTPAGE);
1484
1485 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
1486 proc_init_failed (pi, "PIOCWSTOP failed");
1487
1488 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
1489 proc_init_failed (pi, "PIOCSFAULT failed");
1490 }
1491
1492 /*
1493
1494 LOCAL FUNCTION
1495
1496 procfs_init_inferior - initialize target vector and access to a
1497 /proc entry
1498
1499 SYNOPSIS
1500
1501 void procfs_init_inferior (int pid)
1502
1503 DESCRIPTION
1504
1505 When gdb starts an inferior, this function is called in the parent
1506 process immediately after the fork. It waits for the child to stop
1507 on the return from the exec system call (the child itself takes care
1508 of ensuring that this is set up), then sets up the set of signals
1509 and faults that are to be traced.
1510
1511 NOTES
1512
1513 If proc_init_failed ever gets called, control returns to the command
1514 processing loop via the standard error handling code.
1515
1516 */
1517
1518 static void
1519 procfs_init_inferior (pid)
1520 int pid;
1521 {
1522 push_target (&procfs_ops);
1523
1524 create_procinfo (pid);
1525 add_thread (pid); /* Setup initial thread */
1526 }
1527
1528 /*
1529
1530 GLOBAL FUNCTION
1531
1532 procfs_notice_signals
1533
1534 SYNOPSIS
1535
1536 static void procfs_notice_signals (int pid);
1537
1538 DESCRIPTION
1539
1540 When the user changes the state of gdb's signal handling via the
1541 "handle" command, this function gets called to see if any change
1542 in the /proc interface is required. It is also called internally
1543 by other /proc interface functions to initialize the state of
1544 the traced signal set.
1545
1546 One thing it does is that signals for which the state is "nostop",
1547 "noprint", and "pass", have their trace bits reset in the pr_trace
1548 field, so that they are no longer traced. This allows them to be
1549 delivered directly to the inferior without the debugger ever being
1550 involved.
1551 */
1552
1553 static void
1554 procfs_notice_signals (pid)
1555 int pid;
1556 {
1557 int signo;
1558 struct procinfo *pi;
1559
1560 pi = find_procinfo (pid, 0);
1561
1562 for (signo = 0; signo < NSIG; signo++)
1563 {
1564 if (signal_stop_state (signo) == 0 &&
1565 signal_print_state (signo) == 0 &&
1566 signal_pass_state (signo) == 1)
1567 {
1568 prdelset (&pi->prrun.pr_trace, signo);
1569 }
1570 else
1571 {
1572 praddset (&pi->prrun.pr_trace, signo);
1573 }
1574 }
1575 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
1576 {
1577 print_sys_errmsg ("PIOCSTRACE failed", errno);
1578 }
1579 }
1580
1581 /*
1582
1583 LOCAL FUNCTION
1584
1585 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1586
1587 SYNOPSIS
1588
1589 void proc_set_exec_trap (void)
1590
1591 DESCRIPTION
1592
1593 This function is called in the child process when starting up
1594 an inferior, prior to doing the exec of the actual inferior.
1595 It sets the child process's exitset to make exit from the exec
1596 system call an event of interest to stop on, and then simply
1597 returns. The child does the exec, the system call returns, and
1598 the child stops at the first instruction, ready for the gdb
1599 parent process to take control of it.
1600
1601 NOTE
1602
1603 We need to use all local variables since the child may be sharing
1604 it's data space with the parent, if vfork was used rather than
1605 fork.
1606
1607 Also note that we want to turn off the inherit-on-fork flag in
1608 the child process so that any grand-children start with all
1609 tracing flags cleared.
1610 */
1611
1612 static void
1613 proc_set_exec_trap ()
1614 {
1615 sysset_t exitset;
1616 sysset_t entryset;
1617 auto char procname[32];
1618 int fd;
1619
1620 sprintf (procname, PROC_NAME_FMT, getpid ());
1621 if ((fd = open (procname, O_RDWR)) < 0)
1622 {
1623 perror (procname);
1624 fflush (stderr);
1625 _exit (127);
1626 }
1627 premptyset (&exitset);
1628 premptyset (&entryset);
1629
1630 /* GW: Rationale...
1631 Not all systems with /proc have all the exec* syscalls with the same
1632 names. On the SGI, for example, there is no SYS_exec, but there
1633 *is* a SYS_execv. So, we try to account for that. */
1634
1635 #ifdef SYS_exec
1636 praddset (&exitset, SYS_exec);
1637 #endif
1638 #ifdef SYS_execve
1639 praddset (&exitset, SYS_execve);
1640 #endif
1641 #ifdef SYS_execv
1642 praddset (&exitset, SYS_execv);
1643 #endif
1644
1645 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1646 {
1647 perror (procname);
1648 fflush (stderr);
1649 _exit (127);
1650 }
1651
1652 praddset (&entryset, SYS_exit);
1653
1654 if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
1655 {
1656 perror (procname);
1657 fflush (stderr);
1658 _exit (126);
1659 }
1660
1661 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1662 start with tracing flags cleared. */
1663
1664 #if defined (PIOCRESET) /* New method */
1665 {
1666 long pr_flags;
1667 pr_flags = PR_FORK;
1668 ioctl (fd, PIOCRESET, &pr_flags);
1669 }
1670 #else
1671 #if defined (PIOCRFORK) /* Original method */
1672 ioctl (fd, PIOCRFORK, NULL);
1673 #endif
1674 #endif
1675
1676 /* Turn on run-on-last-close flag so that this process will not hang
1677 if GDB goes away for some reason. */
1678
1679 #if defined (PIOCSET) /* New method */
1680 {
1681 long pr_flags;
1682 pr_flags = PR_RLC;
1683 (void) ioctl (fd, PIOCSET, &pr_flags);
1684 }
1685 #else
1686 #if defined (PIOCSRLC) /* Original method */
1687 (void) ioctl (fd, PIOCSRLC, 0);
1688 #endif
1689 #endif
1690 }
1691
1692 /*
1693
1694 GLOBAL FUNCTION
1695
1696 proc_iterate_over_mappings -- call function for every mapped space
1697
1698 SYNOPSIS
1699
1700 int proc_iterate_over_mappings (int (*func)())
1701
1702 DESCRIPTION
1703
1704 Given a pointer to a function, call that function for every
1705 mapped address space, passing it an open file descriptor for
1706 the file corresponding to that mapped address space (if any)
1707 and the base address of the mapped space. Quit when we hit
1708 the end of the mappings or the function returns nonzero.
1709 */
1710
1711 int
1712 proc_iterate_over_mappings (func)
1713 int (*func) PARAMS ((int, CORE_ADDR));
1714 {
1715 int nmap;
1716 int fd;
1717 int funcstat = 0;
1718 struct prmap *prmaps;
1719 struct prmap *prmap;
1720 struct procinfo *pi;
1721
1722 pi = current_procinfo;
1723
1724 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1725 {
1726 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1727 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1728 {
1729 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1730 {
1731 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
1732 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1733 close (fd);
1734 }
1735 }
1736 }
1737 return (funcstat);
1738 }
1739
1740 #if 0 /* Currently unused */
1741 /*
1742
1743 GLOBAL FUNCTION
1744
1745 proc_base_address -- find base address for segment containing address
1746
1747 SYNOPSIS
1748
1749 CORE_ADDR proc_base_address (CORE_ADDR addr)
1750
1751 DESCRIPTION
1752
1753 Given an address of a location in the inferior, find and return
1754 the base address of the mapped segment containing that address.
1755
1756 This is used for example, by the shared library support code,
1757 where we have the pc value for some location in the shared library
1758 where we are stopped, and need to know the base address of the
1759 segment containing that address.
1760 */
1761
1762 CORE_ADDR
1763 proc_base_address (addr)
1764 CORE_ADDR addr;
1765 {
1766 int nmap;
1767 struct prmap *prmaps;
1768 struct prmap *prmap;
1769 CORE_ADDR baseaddr = 0;
1770 struct procinfo *pi;
1771
1772 pi = current_procinfo;
1773
1774 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1775 {
1776 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1777 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1778 {
1779 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1780 {
1781 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1782 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1783 {
1784 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1785 break;
1786 }
1787 }
1788 }
1789 }
1790 return (baseaddr);
1791 }
1792
1793 #endif /* 0 */
1794
1795 /*
1796
1797 LOCAL FUNCTION
1798
1799 proc_address_to_fd -- return open fd for file mapped to address
1800
1801 SYNOPSIS
1802
1803 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1804
1805 DESCRIPTION
1806
1807 Given an address in the current inferior's address space, use the
1808 /proc interface to find an open file descriptor for the file that
1809 this address was mapped in from. Return -1 if there is no current
1810 inferior. Print a warning message if there is an inferior but
1811 the address corresponds to no file (IE a bogus address).
1812
1813 */
1814
1815 static int
1816 proc_address_to_fd (pi, addr, complain)
1817 struct procinfo *pi;
1818 CORE_ADDR addr;
1819 int complain;
1820 {
1821 int fd = -1;
1822
1823 if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1824 {
1825 if (complain)
1826 {
1827 print_sys_errmsg (pi->pathname, errno);
1828 warning ("can't find mapped file for address 0x%x", addr);
1829 }
1830 }
1831 return (fd);
1832 }
1833
1834
1835 /* Attach to process PID, then initialize for debugging it
1836 and wait for the trace-trap that results from attaching. */
1837
1838 static void
1839 procfs_attach (args, from_tty)
1840 char *args;
1841 int from_tty;
1842 {
1843 char *exec_file;
1844 int pid;
1845
1846 if (!args)
1847 error_no_arg ("process-id to attach");
1848
1849 pid = atoi (args);
1850
1851 if (pid == getpid()) /* Trying to masturbate? */
1852 error ("I refuse to debug myself!");
1853
1854 if (from_tty)
1855 {
1856 exec_file = (char *) get_exec_file (0);
1857
1858 if (exec_file)
1859 printf ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
1860 else
1861 printf ("Attaching to %s\n", target_pid_to_str (pid));
1862
1863 fflush (stdout);
1864 }
1865
1866 do_attach (pid);
1867 inferior_pid = pid;
1868 push_target (&procfs_ops);
1869 }
1870
1871
1872 /* Take a program previously attached to and detaches it.
1873 The program resumes execution and will no longer stop
1874 on signals, etc. We'd better not have left any breakpoints
1875 in the program or it'll die when it hits one. For this
1876 to work, it may be necessary for the process to have been
1877 previously attached. It *might* work if the program was
1878 started via the normal ptrace (PTRACE_TRACEME). */
1879
1880 static void
1881 procfs_detach (args, from_tty)
1882 char *args;
1883 int from_tty;
1884 {
1885 int siggnal = 0;
1886
1887 if (from_tty)
1888 {
1889 char *exec_file = get_exec_file (0);
1890 if (exec_file == 0)
1891 exec_file = "";
1892 printf ("Detaching from program: %s %s\n",
1893 exec_file, target_pid_to_str (inferior_pid));
1894 fflush (stdout);
1895 }
1896 if (args)
1897 siggnal = atoi (args);
1898
1899 do_detach (siggnal);
1900 inferior_pid = 0;
1901 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
1902 }
1903
1904 /* Get ready to modify the registers array. On machines which store
1905 individual registers, this doesn't need to do anything. On machines
1906 which store all the registers in one fell swoop, this makes sure
1907 that registers contains all the registers from the program being
1908 debugged. */
1909
1910 static void
1911 procfs_prepare_to_store ()
1912 {
1913 #ifdef CHILD_PREPARE_TO_STORE
1914 CHILD_PREPARE_TO_STORE ();
1915 #endif
1916 }
1917
1918 /* Print status information about what we're accessing. */
1919
1920 static void
1921 procfs_files_info (ignore)
1922 struct target_ops *ignore;
1923 {
1924 printf ("\tUsing the running image of %s %s via /proc.\n",
1925 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
1926 }
1927
1928 /* ARGSUSED */
1929 static void
1930 procfs_open (arg, from_tty)
1931 char *arg;
1932 int from_tty;
1933 {
1934 error ("Use the \"run\" command to start a Unix child process.");
1935 }
1936
1937 /*
1938
1939 LOCAL FUNCTION
1940
1941 do_attach -- attach to an already existing process
1942
1943 SYNOPSIS
1944
1945 int do_attach (int pid)
1946
1947 DESCRIPTION
1948
1949 Attach to an already existing process with the specified process
1950 id. If the process is not already stopped, query whether to
1951 stop it or not.
1952
1953 NOTES
1954
1955 The option of stopping at attach time is specific to the /proc
1956 versions of gdb. Versions using ptrace force the attachee
1957 to stop. (I have changed this version to do so, too. All you
1958 have to do is "continue" to make it go on. -- gnu@cygnus.com)
1959
1960 */
1961
1962 static int
1963 do_attach (pid)
1964 int pid;
1965 {
1966 int result;
1967 struct procinfo *pi;
1968
1969 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1970
1971 if (!open_proc_file (pid, pi, O_RDWR))
1972 {
1973 free (pi);
1974 perror_with_name (pi->pathname);
1975 /* NOTREACHED */
1976 }
1977
1978 /* Add new process to process info list */
1979
1980 pi->next = procinfo_list;
1981 procinfo_list = pi;
1982
1983 add_fd (pi); /* Add to list for poll/select */
1984
1985 /* Get current status of process and if it is not already stopped,
1986 then stop it. Remember whether or not it was stopped when we first
1987 examined it. */
1988
1989 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
1990 {
1991 print_sys_errmsg (pi->pathname, errno);
1992 close_proc_file (pi);
1993 error ("PIOCSTATUS failed");
1994 }
1995 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1996 {
1997 pi->was_stopped = 1;
1998 }
1999 else
2000 {
2001 pi->was_stopped = 0;
2002 if (1 || query ("Process is currently running, stop it? "))
2003 {
2004 /* Make it run again when we close it. */
2005 #if defined (PIOCSET) /* New method */
2006 {
2007 long pr_flags;
2008 pr_flags = PR_RLC;
2009 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2010 }
2011 #else
2012 #if defined (PIOCSRLC) /* Original method */
2013 result = ioctl (pi->fd, PIOCSRLC, 0);
2014 #endif
2015 #endif
2016 if (result < 0)
2017 {
2018 print_sys_errmsg (pi->pathname, errno);
2019 close_proc_file (pi);
2020 error ("PIOCSRLC or PIOCSET failed");
2021 }
2022 if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
2023 {
2024 print_sys_errmsg (pi->pathname, errno);
2025 close_proc_file (pi);
2026 error ("PIOCSTOP failed");
2027 }
2028 pi->nopass_next_sigstop = 1;
2029 }
2030 else
2031 {
2032 printf ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
2033 }
2034 }
2035
2036 /* Remember some things about the inferior that we will, or might, change
2037 so that we can restore them when we detach. */
2038
2039 ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
2040 ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
2041 ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
2042 ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
2043 ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
2044
2045 /* Set up trace and fault sets, as gdb expects them. */
2046
2047 memset (&pi->prrun, 0, sizeof (pi->prrun));
2048 prfillset (&pi->prrun.pr_trace);
2049 procfs_notice_signals (pid);
2050 prfillset (&pi->prrun.pr_fault);
2051 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2052 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
2053 {
2054 print_sys_errmsg ("PIOCSFAULT failed", errno);
2055 }
2056 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
2057 {
2058 print_sys_errmsg ("PIOCSTRACE failed", errno);
2059 }
2060 attach_flag = 1;
2061 return (pid);
2062 }
2063
2064 /*
2065
2066 LOCAL FUNCTION
2067
2068 do_detach -- detach from an attached-to process
2069
2070 SYNOPSIS
2071
2072 void do_detach (int signal)
2073
2074 DESCRIPTION
2075
2076 Detach from the current attachee.
2077
2078 If signal is non-zero, the attachee is started running again and sent
2079 the specified signal.
2080
2081 If signal is zero and the attachee was not already stopped when we
2082 attached to it, then we make it runnable again when we detach.
2083
2084 Otherwise, we query whether or not to make the attachee runnable
2085 again, since we may simply want to leave it in the state it was in
2086 when we attached.
2087
2088 We report any problems, but do not consider them errors, since we
2089 MUST detach even if some things don't seem to go right. This may not
2090 be the ideal situation. (FIXME).
2091 */
2092
2093 static void
2094 do_detach (signal)
2095 int signal;
2096 {
2097 int result;
2098 struct procinfo *pi;
2099
2100 pi = current_procinfo;
2101
2102 if (signal)
2103 {
2104 set_proc_siginfo (pi, signal);
2105 }
2106 if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
2107 {
2108 print_sys_errmsg (pi->pathname, errno);
2109 printf ("PIOCSEXIT failed.\n");
2110 }
2111 if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
2112 {
2113 print_sys_errmsg (pi->pathname, errno);
2114 printf ("PIOCSENTRY failed.\n");
2115 }
2116 if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
2117 {
2118 print_sys_errmsg (pi->pathname, errno);
2119 printf ("PIOCSTRACE failed.\n");
2120 }
2121 if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
2122 {
2123 print_sys_errmsg (pi->pathname, errno);
2124 printf ("PIOSCHOLD failed.\n");
2125 }
2126 if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
2127 {
2128 print_sys_errmsg (pi->pathname, errno);
2129 printf ("PIOCSFAULT failed.\n");
2130 }
2131 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2132 {
2133 print_sys_errmsg (pi->pathname, errno);
2134 printf ("PIOCSTATUS failed.\n");
2135 }
2136 else
2137 {
2138 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2139 {
2140 if (signal || !pi->was_stopped ||
2141 query ("Was stopped when attached, make it runnable again? "))
2142 {
2143 /* Clear any fault that might have stopped it. */
2144 if (ioctl (pi->fd, PIOCCFAULT, 0))
2145 {
2146 print_sys_errmsg (pi->pathname, errno);
2147 printf ("PIOCCFAULT failed.\n");
2148 }
2149
2150 /* Make it run again when we close it. */
2151 #if defined (PIOCSET) /* New method */
2152 {
2153 long pr_flags;
2154 pr_flags = PR_RLC;
2155 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2156 }
2157 #else
2158 #if defined (PIOCSRLC) /* Original method */
2159 result = ioctl (pi->fd, PIOCSRLC, 0);
2160 #endif
2161 #endif
2162 if (result)
2163 {
2164 print_sys_errmsg (pi->pathname, errno);
2165 printf ("PIOCSRLC or PIOCSET failed.\n");
2166 }
2167 }
2168 }
2169 }
2170 close_proc_file (pi);
2171 attach_flag = 0;
2172 }
2173
2174 /*
2175
2176 LOCAL FUNCTION
2177
2178 procfs_wait -- emulate wait() as much as possible
2179 Wait for child to do something. Return pid of child, or -1 in case
2180 of error; store status through argument pointer STATUS.
2181
2182
2183 SYNOPSIS
2184
2185 int procfs_wait (int pid, int *statloc)
2186
2187 DESCRIPTION
2188
2189 Try to emulate wait() as much as possible. Not sure why we can't
2190 just use wait(), but it seems to have problems when applied to a
2191 process being controlled with the /proc interface.
2192
2193 NOTES
2194
2195 We have a race problem here with no obvious solution. We need to let
2196 the inferior run until it stops on an event of interest, which means
2197 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2198 ioctl if the process is already stopped on something that is not an
2199 event of interest, or the call will hang indefinitely. Thus we first
2200 use PIOCSTATUS to see if the process is not stopped. If not, then we
2201 use PIOCWSTOP. But during the window between the two, if the process
2202 stops for any reason that is not an event of interest (such as a job
2203 control signal) then gdb will hang. One possible workaround is to set
2204 an alarm to wake up every minute of so and check to see if the process
2205 is still running, and if so, then reissue the PIOCWSTOP. But this is
2206 a real kludge, so has not been implemented. FIXME: investigate
2207 alternatives.
2208
2209 FIXME: Investigate why wait() seems to have problems with programs
2210 being control by /proc routines.
2211
2212 */
2213
2214 static int
2215 procfs_wait (pid, statloc)
2216 int pid;
2217 int *statloc;
2218 {
2219 short what;
2220 short why;
2221 int statval = 0;
2222 int checkerr = 0;
2223 int rtnval = -1;
2224 struct procinfo *pi;
2225
2226 if (pid != -1) /* Non-specific process? */
2227 pi = NULL;
2228 else
2229 for (pi = procinfo_list; pi; pi = pi->next)
2230 if (pi->had_event)
2231 break;
2232
2233 wait_again:
2234
2235 if (!pi)
2236 pi = wait_fd ();
2237
2238 if (pid != -1)
2239 for (pi = procinfo_list; pi; pi = pi->next)
2240 if (pi->pid == pid && pi->had_event)
2241 break;
2242
2243 if (!pi && !checkerr)
2244 goto wait_again;
2245
2246 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2247 {
2248 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
2249 {
2250 checkerr++;
2251 }
2252 }
2253 if (checkerr)
2254 {
2255 if (errno == ENOENT)
2256 {
2257 rtnval = wait (&statval);
2258 if (rtnval != inferior_pid)
2259 {
2260 print_sys_errmsg (pi->pathname, errno);
2261 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
2262 /* NOTREACHED */
2263 }
2264 }
2265 else
2266 {
2267 print_sys_errmsg (pi->pathname, errno);
2268 error ("PIOCSTATUS or PIOCWSTOP failed.");
2269 /* NOTREACHED */
2270 }
2271 }
2272 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2273 {
2274 rtnval = pi->prstatus.pr_pid;
2275 why = pi->prstatus.pr_why;
2276 what = pi->prstatus.pr_what;
2277
2278 switch (why)
2279 {
2280 case PR_SIGNALLED:
2281 statval = (what << 8) | 0177;
2282 break;
2283 case PR_SYSENTRY:
2284 if (what != SYS_exit)
2285 error ("PR_SYSENTRY, unknown system call %d", what);
2286
2287 pi->prrun.pr_flags = PRCFAULT;
2288
2289 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2290 perror_with_name (pi->pathname);
2291
2292 rtnval = wait (&statval);
2293
2294 break;
2295 case PR_SYSEXIT:
2296 switch (what)
2297 {
2298 #ifdef SYS_exec
2299 case SYS_exec:
2300 #endif
2301 #ifdef SYS_execve
2302 case SYS_execve:
2303 #endif
2304 #ifdef SYS_execv
2305 case SYS_execv:
2306 #endif
2307 statval = (SIGTRAP << 8) | 0177;
2308 break;
2309 #ifdef SYS_sproc
2310 case SYS_sproc:
2311 /* We've just detected the completion of an sproc system call. Now we need to
2312 setup a procinfo struct for this thread, and notify the thread system of the
2313 new arrival. */
2314
2315 /* If sproc failed, then nothing interesting happened. Continue the process and
2316 go back to sleep. */
2317
2318 if (pi->prstatus.pr_errno != 0)
2319 {
2320 pi->prrun.pr_flags &= PRSTEP;
2321 pi->prrun.pr_flags |= PRCFAULT;
2322
2323 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2324 perror_with_name (pi->pathname);
2325
2326 goto wait_again;
2327 }
2328
2329 /* At this point, the new thread is stopped at it's first instruction, and
2330 the parent is stopped at the exit from sproc. */
2331
2332 /* Notify the caller of the arrival of a new thread. */
2333 create_procinfo (pi->prstatus.pr_rval1);
2334
2335 rtnval = pi->prstatus.pr_rval1;
2336 statval = (SIGTRAP << 8) | 0177;
2337
2338 break;
2339 #endif /* SYS_sproc */
2340
2341 default:
2342 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
2343 }
2344 break;
2345 case PR_REQUESTED:
2346 statval = (SIGSTOP << 8) | 0177;
2347 break;
2348 case PR_JOBCONTROL:
2349 statval = (what << 8) | 0177;
2350 break;
2351 case PR_FAULTED:
2352 switch (what)
2353 {
2354 case FLTPRIV:
2355 case FLTILL:
2356 statval = (SIGILL << 8) | 0177;
2357 break;
2358 case FLTBPT:
2359 case FLTTRACE:
2360 statval = (SIGTRAP << 8) | 0177;
2361 break;
2362 case FLTSTACK:
2363 case FLTACCESS:
2364 case FLTBOUNDS:
2365 statval = (SIGSEGV << 8) | 0177;
2366 break;
2367 case FLTIOVF:
2368 case FLTIZDIV:
2369 case FLTFPE:
2370 statval = (SIGFPE << 8) | 0177;
2371 break;
2372 case FLTPAGE: /* Recoverable page fault */
2373 default:
2374 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2375 }
2376 break;
2377 default:
2378 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2379 }
2380 /* Stop all the other threads when any of them stops. */
2381
2382 {
2383 struct procinfo *procinfo;
2384
2385 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2386 {
2387 if (!procinfo->had_event)
2388 if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
2389 {
2390 print_sys_errmsg (procinfo->pathname, errno);
2391 error ("PIOCSTOP failed");
2392 }
2393 }
2394 }
2395 }
2396 else
2397 {
2398 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2399 pi->prstatus.pr_flags);
2400 }
2401
2402 if (statloc)
2403 {
2404 *statloc = statval;
2405 }
2406
2407 if (rtnval == -1) /* No more children to wait for */
2408 {
2409 fprintf (stderr, "Child process unexpectedly missing.\n");
2410 *statloc = 42; /* Claim it exited with signal 42 */
2411 return rtnval;
2412 }
2413
2414 pi->had_event = 0; /* Indicate that we've seen this one */
2415 return (rtnval);
2416 }
2417
2418 /*
2419
2420 LOCAL FUNCTION
2421
2422 set_proc_siginfo - set a process's current signal info
2423
2424 SYNOPSIS
2425
2426 void set_proc_siginfo (struct procinfo *pip, int signo);
2427
2428 DESCRIPTION
2429
2430 Given a pointer to a process info struct in PIP and a signal number
2431 in SIGNO, set the process's current signal and its associated signal
2432 information. The signal will be delivered to the process immediately
2433 after execution is resumed, even if it is being held. In addition,
2434 this particular delivery will not cause another PR_SIGNALLED stop
2435 even if the signal is being traced.
2436
2437 If we are not delivering the same signal that the prstatus siginfo
2438 struct contains information about, then synthesize a siginfo struct
2439 to match the signal we are doing to deliver, make it of the type
2440 "generated by a user process", and send this synthesized copy. When
2441 used to set the inferior's signal state, this will be required if we
2442 are not currently stopped because of a traced signal, or if we decide
2443 to continue with a different signal.
2444
2445 Note that when continuing the inferior from a stop due to receipt
2446 of a traced signal, we either have set PRCSIG to clear the existing
2447 signal, or we have to call this function to do a PIOCSSIG with either
2448 the existing siginfo struct from pr_info, or one we have synthesized
2449 appropriately for the signal we want to deliver. Otherwise if the
2450 signal is still being traced, the inferior will immediately stop
2451 again.
2452
2453 See siginfo(5) for more details.
2454 */
2455
2456 static void
2457 set_proc_siginfo (pip, signo)
2458 struct procinfo *pip;
2459 int signo;
2460 {
2461 struct siginfo newsiginfo;
2462 struct siginfo *sip;
2463
2464 if (signo == pip -> prstatus.pr_info.si_signo)
2465 {
2466 sip = &pip -> prstatus.pr_info;
2467 }
2468 else
2469 {
2470 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2471 sip = &newsiginfo;
2472 sip -> si_signo = signo;
2473 sip -> si_code = 0;
2474 sip -> si_errno = 0;
2475 sip -> si_pid = getpid ();
2476 sip -> si_uid = getuid ();
2477 }
2478 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2479 {
2480 print_sys_errmsg (pip -> pathname, errno);
2481 warning ("PIOCSSIG failed");
2482 }
2483 }
2484
2485 /* Resume execution of process PID. If STEP is nozero, then
2486 just single step it. If SIGNAL is nonzero, restart it with that
2487 signal activated. */
2488
2489 static void
2490 procfs_resume (pid, step, signo)
2491 int pid;
2492 int step;
2493 int signo;
2494 {
2495 int signal_to_pass;
2496 struct procinfo *pi, *procinfo;
2497
2498 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
2499
2500 errno = 0;
2501 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2502
2503 #if 0
2504 /* It should not be necessary. If the user explicitly changes the value,
2505 value_assign calls write_register_bytes, which writes it. */
2506 /* It may not be absolutely necessary to specify the PC value for
2507 restarting, but to be safe we use the value that gdb considers
2508 to be current. One case where this might be necessary is if the
2509 user explicitly changes the PC value that gdb considers to be
2510 current. FIXME: Investigate if this is necessary or not. */
2511
2512 #ifdef PRSVADDR_BROKEN
2513 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2514 place to put nPC. In fact, if you use this, nPC seems to be set to some
2515 random garbage. We have to rely on the fact that PC and nPC have been
2516 written previously via PIOCSREG during a register flush. */
2517
2518 pi->prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
2519 pi->prrun.pr_flags != PRSVADDR;
2520 #endif
2521 #endif
2522
2523 if (signo == SIGSTOP && pi->nopass_next_sigstop)
2524 /* When attaching to a child process, if we forced it to stop with
2525 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2526 Upon resuming the first time after such a stop, we explicitly
2527 inhibit sending it another SIGSTOP, which would be the normal
2528 result of default signal handling. One potential drawback to
2529 this is that we will also ignore any attempt to by the user
2530 to explicitly continue after the attach with a SIGSTOP. Ultimately
2531 this problem should be dealt with by making the routines that
2532 deal with the inferior a little smarter, and possibly even allow
2533 an inferior to continue running at the same time as gdb. (FIXME?) */
2534 signal_to_pass = 0;
2535 else if (signo == SIGTSTP
2536 && pi->prstatus.pr_cursig == SIGTSTP
2537 && pi->prstatus.pr_action.sa_handler == SIG_DFL)
2538
2539 /* We are about to pass the inferior a SIGTSTP whose action is
2540 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2541 (notifying the parent via wait()), and then keep going from the
2542 same place when the parent is ready for you to keep going. So
2543 under the debugger, it should do nothing (as if the program had
2544 been stopped and then later resumed. Under ptrace, this
2545 happens for us, but under /proc, the system obligingly stops
2546 the process, and wait_for_inferior would have no way of
2547 distinguishing that type of stop (which indicates that we
2548 should just start it again), with a stop due to the pr_trace
2549 field of the prrun_t struct.
2550
2551 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2552 because the handler needs to get executed. */
2553 signal_to_pass = 0;
2554 else
2555 signal_to_pass = signo;
2556
2557 if (signal_to_pass)
2558 {
2559 set_proc_siginfo (pi, signal_to_pass);
2560 }
2561 else
2562 {
2563 pi->prrun.pr_flags |= PRCSIG;
2564 }
2565 pi->nopass_next_sigstop = 0;
2566 if (step)
2567 {
2568 pi->prrun.pr_flags |= PRSTEP;
2569 }
2570 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2571 {
2572 perror_with_name (pi->pathname);
2573 /* NOTREACHED */
2574 }
2575
2576 pi->had_event = 0;
2577
2578 /* Continue all the other threads that haven't had an event of
2579 interest. */
2580
2581 if (pid == -1)
2582 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2583 {
2584 if (pi != procinfo && !procinfo->had_event)
2585 {
2586 procinfo->prrun.pr_flags &= PRSTEP;
2587 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
2588 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2589 if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
2590 {
2591 if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
2592 {
2593 fprintf(stderr, "PIOCSTATUS failed, errno=%d\n", errno);
2594 }
2595 print_sys_errmsg (procinfo->pathname, errno);
2596 error ("PIOCRUN failed");
2597 }
2598 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2599 }
2600 }
2601 }
2602
2603 /*
2604
2605 LOCAL FUNCTION
2606
2607 procfs_fetch_registers -- fetch current registers from inferior
2608
2609 SYNOPSIS
2610
2611 void procfs_fetch_registers (int regno)
2612
2613 DESCRIPTION
2614
2615 Read the current values of the inferior's registers, both the
2616 general register set and floating point registers (if supported)
2617 and update gdb's idea of their current values.
2618
2619 */
2620
2621 static void
2622 procfs_fetch_registers (regno)
2623 int regno;
2624 {
2625 struct procinfo *pi;
2626
2627 pi = current_procinfo;
2628
2629 if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
2630 {
2631 supply_gregset (&pi->gregset);
2632 }
2633 #if defined (FP0_REGNUM)
2634 if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
2635 {
2636 supply_fpregset (&pi->fpregset);
2637 }
2638 #endif
2639 }
2640
2641 /*
2642
2643 LOCAL FUNCTION
2644
2645 proc_init_failed - called whenever /proc access initialization
2646 fails
2647
2648 SYNOPSIS
2649
2650 static void proc_init_failed (struct procinfo *pi, char *why)
2651
2652 DESCRIPTION
2653
2654 This function is called whenever initialization of access to a /proc
2655 entry fails. It prints a suitable error message, does some cleanup,
2656 and then invokes the standard error processing routine which dumps
2657 us back into the command loop.
2658 */
2659
2660 static void
2661 proc_init_failed (pi, why)
2662 struct procinfo *pi;
2663 char *why;
2664 {
2665 print_sys_errmsg (pi->pathname, errno);
2666 kill (pi->pid, SIGKILL);
2667 close_proc_file (pi);
2668 error (why);
2669 /* NOTREACHED */
2670 }
2671
2672 /*
2673
2674 LOCAL FUNCTION
2675
2676 close_proc_file - close any currently open /proc entry
2677
2678 SYNOPSIS
2679
2680 static void close_proc_file (struct procinfo *pip)
2681
2682 DESCRIPTION
2683
2684 Close any currently open /proc entry and mark the process information
2685 entry as invalid. In order to ensure that we don't try to reuse any
2686 stale information, the pid, fd, and pathnames are explicitly
2687 invalidated, which may be overkill.
2688
2689 */
2690
2691 static void
2692 close_proc_file (pip)
2693 struct procinfo *pip;
2694 {
2695 struct procinfo *procinfo;
2696
2697 remove_fd (pip); /* Remove fd from poll/select list */
2698
2699 close (pip -> fd);
2700
2701 free (pip -> pathname);
2702
2703 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2704
2705 if (procinfo_list == pip)
2706 procinfo_list = pip->next;
2707 else
2708 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2709 if (procinfo->next == pip)
2710 procinfo->next = pip->next;
2711
2712 free (pip);
2713 }
2714
2715 /*
2716
2717 LOCAL FUNCTION
2718
2719 open_proc_file - open a /proc entry for a given process id
2720
2721 SYNOPSIS
2722
2723 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2724
2725 DESCRIPTION
2726
2727 Given a process id and a mode, close the existing open /proc
2728 entry (if any) and open one for the new process id, in the
2729 specified mode. Once it is open, then mark the local process
2730 information structure as valid, which guarantees that the pid,
2731 fd, and pathname fields match an open /proc entry. Returns
2732 zero if the open fails, nonzero otherwise.
2733
2734 Note that the pathname is left intact, even when the open fails,
2735 so that callers can use it to construct meaningful error messages
2736 rather than just "file open failed".
2737 */
2738
2739 static int
2740 open_proc_file (pid, pip, mode)
2741 int pid;
2742 struct procinfo *pip;
2743 int mode;
2744 {
2745 pip -> next = NULL;
2746 pip -> had_event = 0;
2747 pip -> pathname = xmalloc (32);
2748 pip -> pid = pid;
2749
2750 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2751 if ((pip -> fd = open (pip -> pathname, mode)) < 0)
2752 return 0;
2753
2754 return 1;
2755 }
2756
2757 static char *
2758 mappingflags (flags)
2759 long flags;
2760 {
2761 static char asciiflags[8];
2762
2763 strcpy (asciiflags, "-------");
2764 #if defined (MA_PHYS)
2765 if (flags & MA_PHYS) asciiflags[0] = 'd';
2766 #endif
2767 if (flags & MA_STACK) asciiflags[1] = 's';
2768 if (flags & MA_BREAK) asciiflags[2] = 'b';
2769 if (flags & MA_SHARED) asciiflags[3] = 's';
2770 if (flags & MA_READ) asciiflags[4] = 'r';
2771 if (flags & MA_WRITE) asciiflags[5] = 'w';
2772 if (flags & MA_EXEC) asciiflags[6] = 'x';
2773 return (asciiflags);
2774 }
2775
2776 static void
2777 info_proc_flags (pip, summary)
2778 struct procinfo *pip;
2779 int summary;
2780 {
2781 struct trans *transp;
2782
2783 printf_filtered ("%-32s", "Process status flags:");
2784 if (!summary)
2785 {
2786 printf_filtered ("\n\n");
2787 }
2788 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2789 {
2790 if (pip -> prstatus.pr_flags & transp -> value)
2791 {
2792 if (summary)
2793 {
2794 printf_filtered ("%s ", transp -> name);
2795 }
2796 else
2797 {
2798 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2799 }
2800 }
2801 }
2802 printf_filtered ("\n");
2803 }
2804
2805 static void
2806 info_proc_stop (pip, summary)
2807 struct procinfo *pip;
2808 int summary;
2809 {
2810 struct trans *transp;
2811 int why;
2812 int what;
2813
2814 why = pip -> prstatus.pr_why;
2815 what = pip -> prstatus.pr_what;
2816
2817 if (pip -> prstatus.pr_flags & PR_STOPPED)
2818 {
2819 printf_filtered ("%-32s", "Reason for stopping:");
2820 if (!summary)
2821 {
2822 printf_filtered ("\n\n");
2823 }
2824 for (transp = pr_why_table; transp -> name != NULL; transp++)
2825 {
2826 if (why == transp -> value)
2827 {
2828 if (summary)
2829 {
2830 printf_filtered ("%s ", transp -> name);
2831 }
2832 else
2833 {
2834 printf_filtered ("\t%-16s %s.\n",
2835 transp -> name, transp -> desc);
2836 }
2837 break;
2838 }
2839 }
2840
2841 /* Use the pr_why field to determine what the pr_what field means, and
2842 print more information. */
2843
2844 switch (why)
2845 {
2846 case PR_REQUESTED:
2847 /* pr_what is unused for this case */
2848 break;
2849 case PR_JOBCONTROL:
2850 case PR_SIGNALLED:
2851 if (summary)
2852 {
2853 printf_filtered ("%s ", signalname (what));
2854 }
2855 else
2856 {
2857 printf_filtered ("\t%-16s %s.\n", signalname (what),
2858 safe_strsignal (what));
2859 }
2860 break;
2861 case PR_SYSENTRY:
2862 if (summary)
2863 {
2864 printf_filtered ("%s ", syscallname (what));
2865 }
2866 else
2867 {
2868 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2869 "Entered this system call");
2870 }
2871 break;
2872 case PR_SYSEXIT:
2873 if (summary)
2874 {
2875 printf_filtered ("%s ", syscallname (what));
2876 }
2877 else
2878 {
2879 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2880 "Returned from this system call");
2881 }
2882 break;
2883 case PR_FAULTED:
2884 if (summary)
2885 {
2886 printf_filtered ("%s ",
2887 lookupname (faults_table, what, "fault"));
2888 }
2889 else
2890 {
2891 printf_filtered ("\t%-16s %s.\n",
2892 lookupname (faults_table, what, "fault"),
2893 lookupdesc (faults_table, what));
2894 }
2895 break;
2896 }
2897 printf_filtered ("\n");
2898 }
2899 }
2900
2901 static void
2902 info_proc_siginfo (pip, summary)
2903 struct procinfo *pip;
2904 int summary;
2905 {
2906 struct siginfo *sip;
2907
2908 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2909 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2910 pip -> prstatus.pr_why == PR_FAULTED))
2911 {
2912 printf_filtered ("%-32s", "Additional signal/fault info:");
2913 sip = &pip -> prstatus.pr_info;
2914 if (summary)
2915 {
2916 printf_filtered ("%s ", signalname (sip -> si_signo));
2917 if (sip -> si_errno > 0)
2918 {
2919 printf_filtered ("%s ", errnoname (sip -> si_errno));
2920 }
2921 if (sip -> si_code <= 0)
2922 {
2923 printf_filtered ("sent by %s, uid %d ",
2924 target_pid_to_str (sip -> si_pid),
2925 sip -> si_uid);
2926 }
2927 else
2928 {
2929 printf_filtered ("%s ", sigcodename (sip));
2930 if ((sip -> si_signo == SIGILL) ||
2931 (sip -> si_signo == SIGFPE) ||
2932 (sip -> si_signo == SIGSEGV) ||
2933 (sip -> si_signo == SIGBUS))
2934 {
2935 printf_filtered ("addr=%#x ", sip -> si_addr);
2936 }
2937 else if ((sip -> si_signo == SIGCHLD))
2938 {
2939 printf_filtered ("child %s, status %u ",
2940 target_pid_to_str (sip -> si_pid),
2941 sip -> si_status);
2942 }
2943 else if ((sip -> si_signo == SIGPOLL))
2944 {
2945 printf_filtered ("band %u ", sip -> si_band);
2946 }
2947 }
2948 }
2949 else
2950 {
2951 printf_filtered ("\n\n");
2952 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
2953 safe_strsignal (sip -> si_signo));
2954 if (sip -> si_errno > 0)
2955 {
2956 printf_filtered ("\t%-16s %s.\n",
2957 errnoname (sip -> si_errno),
2958 safe_strerror (sip -> si_errno));
2959 }
2960 if (sip -> si_code <= 0)
2961 {
2962 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2963 "PID of process sending signal");
2964 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2965 "UID of process sending signal");
2966 }
2967 else
2968 {
2969 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2970 sigcodedesc (sip));
2971 if ((sip -> si_signo == SIGILL) ||
2972 (sip -> si_signo == SIGFPE))
2973 {
2974 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2975 "Address of faulting instruction");
2976 }
2977 else if ((sip -> si_signo == SIGSEGV) ||
2978 (sip -> si_signo == SIGBUS))
2979 {
2980 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2981 "Address of faulting memory reference");
2982 }
2983 else if ((sip -> si_signo == SIGCHLD))
2984 {
2985 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2986 "Child process ID");
2987 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2988 "Child process exit value or signal");
2989 }
2990 else if ((sip -> si_signo == SIGPOLL))
2991 {
2992 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2993 "Band event for POLL_{IN,OUT,MSG}");
2994 }
2995 }
2996 }
2997 printf_filtered ("\n");
2998 }
2999 }
3000
3001 static void
3002 info_proc_syscalls (pip, summary)
3003 struct procinfo *pip;
3004 int summary;
3005 {
3006 int syscallnum;
3007
3008 if (!summary)
3009 {
3010
3011 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
3012 if (pip -> prstatus.pr_flags & PR_ASLEEP)
3013 {
3014 int syscallnum = pip -> prstatus.pr_reg[R_D0];
3015 if (summary)
3016 {
3017 printf_filtered ("%-32s", "Sleeping in system call:");
3018 printf_filtered ("%s", syscallname (syscallnum));
3019 }
3020 else
3021 {
3022 printf_filtered ("Sleeping in system call '%s'.\n",
3023 syscallname (syscallnum));
3024 }
3025 }
3026 #endif
3027
3028 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
3029 {
3030 print_sys_errmsg (pip -> pathname, errno);
3031 error ("PIOCGENTRY failed");
3032 }
3033
3034 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
3035 {
3036 print_sys_errmsg (pip -> pathname, errno);
3037 error ("PIOCGEXIT failed");
3038 }
3039
3040 printf_filtered ("System call tracing information:\n\n");
3041
3042 printf_filtered ("\t%-12s %-8s %-8s\n",
3043 "System call",
3044 "Entry",
3045 "Exit");
3046 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
3047 {
3048 QUIT;
3049 if (syscall_table[syscallnum] != NULL)
3050 {
3051 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
3052 printf_filtered ("%-8s ",
3053 prismember (&pip -> entryset, syscallnum)
3054 ? "on" : "off");
3055 printf_filtered ("%-8s ",
3056 prismember (&pip -> exitset, syscallnum)
3057 ? "on" : "off");
3058 printf_filtered ("\n");
3059 }
3060 }
3061 printf_filtered ("\n");
3062 }
3063 }
3064
3065 static char *
3066 signalname (signo)
3067 int signo;
3068 {
3069 char *name;
3070 static char locbuf[32];
3071
3072 name = strsigno (signo);
3073 if (name == NULL)
3074 {
3075 sprintf (locbuf, "Signal %d", signo);
3076 }
3077 else
3078 {
3079 sprintf (locbuf, "%s (%d)", name, signo);
3080 }
3081 return (locbuf);
3082 }
3083
3084 static char *
3085 errnoname (errnum)
3086 int errnum;
3087 {
3088 char *name;
3089 static char locbuf[32];
3090
3091 name = strerrno (errnum);
3092 if (name == NULL)
3093 {
3094 sprintf (locbuf, "Errno %d", errnum);
3095 }
3096 else
3097 {
3098 sprintf (locbuf, "%s (%d)", name, errnum);
3099 }
3100 return (locbuf);
3101 }
3102
3103 static void
3104 info_proc_signals (pip, summary)
3105 struct procinfo *pip;
3106 int summary;
3107 {
3108 int signo;
3109
3110 if (!summary)
3111 {
3112 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
3113 {
3114 print_sys_errmsg (pip -> pathname, errno);
3115 error ("PIOCGTRACE failed");
3116 }
3117
3118 printf_filtered ("Disposition of signals:\n\n");
3119 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3120 "Signal", "Trace", "Hold", "Pending", "Description");
3121 for (signo = 0; signo < NSIG; signo++)
3122 {
3123 QUIT;
3124 printf_filtered ("\t%-15s ", signalname (signo));
3125 printf_filtered ("%-8s ",
3126 prismember (&pip -> trace, signo)
3127 ? "on" : "off");
3128 printf_filtered ("%-8s ",
3129 prismember (&pip -> prstatus.pr_sighold, signo)
3130 ? "on" : "off");
3131 printf_filtered ("%-8s ",
3132 prismember (&pip -> prstatus.pr_sigpend, signo)
3133 ? "yes" : "no");
3134 printf_filtered (" %s\n", safe_strsignal (signo));
3135 }
3136 printf_filtered ("\n");
3137 }
3138 }
3139
3140 static void
3141 info_proc_faults (pip, summary)
3142 struct procinfo *pip;
3143 int summary;
3144 {
3145 struct trans *transp;
3146
3147 if (!summary)
3148 {
3149 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
3150 {
3151 print_sys_errmsg (pip -> pathname, errno);
3152 error ("PIOCGFAULT failed");
3153 }
3154
3155 printf_filtered ("Current traced hardware fault set:\n\n");
3156 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3157
3158 for (transp = faults_table; transp -> name != NULL; transp++)
3159 {
3160 QUIT;
3161 printf_filtered ("\t%-12s ", transp -> name);
3162 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
3163 ? "on" : "off");
3164 printf_filtered ("\n");
3165 }
3166 printf_filtered ("\n");
3167 }
3168 }
3169
3170 static void
3171 info_proc_mappings (pip, summary)
3172 struct procinfo *pip;
3173 int summary;
3174 {
3175 int nmap;
3176 struct prmap *prmaps;
3177 struct prmap *prmap;
3178
3179 if (!summary)
3180 {
3181 printf_filtered ("Mapped address spaces:\n\n");
3182 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3183 "Start Addr",
3184 " End Addr",
3185 " Size",
3186 " Offset",
3187 "Flags");
3188 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
3189 {
3190 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3191 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
3192 {
3193 for (prmap = prmaps; prmap -> pr_size; ++prmap)
3194 {
3195 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
3196 prmap -> pr_vaddr,
3197 prmap -> pr_vaddr + prmap -> pr_size - 1,
3198 prmap -> pr_size,
3199 prmap -> pr_off,
3200 mappingflags (prmap -> pr_mflags));
3201 }
3202 }
3203 }
3204 printf_filtered ("\n");
3205 }
3206 }
3207
3208 /*
3209
3210 LOCAL FUNCTION
3211
3212 info_proc -- implement the "info proc" command
3213
3214 SYNOPSIS
3215
3216 void info_proc (char *args, int from_tty)
3217
3218 DESCRIPTION
3219
3220 Implement gdb's "info proc" command by using the /proc interface
3221 to print status information about any currently running process.
3222
3223 Examples of the use of "info proc" are:
3224
3225 info proc (prints summary info for current inferior)
3226 info proc 123 (prints summary info for process with pid 123)
3227 info proc mappings (prints address mappings)
3228 info proc times (prints process/children times)
3229 info proc id (prints pid, ppid, gid, sid, etc)
3230 FIXME: i proc id not implemented.
3231 info proc status (prints general process state info)
3232 FIXME: i proc status not implemented.
3233 info proc signals (prints info about signal handling)
3234 info proc all (prints all info)
3235
3236 */
3237
3238 static void
3239 info_proc (args, from_tty)
3240 char *args;
3241 int from_tty;
3242 {
3243 int pid;
3244 struct procinfo *pip;
3245 struct cleanup *old_chain;
3246 char **argv;
3247 int argsize;
3248 int summary = 1;
3249 int flags = 0;
3250 int syscalls = 0;
3251 int signals = 0;
3252 int faults = 0;
3253 int mappings = 0;
3254 int times = 0;
3255 int id = 0;
3256 int status = 0;
3257 int all = 0;
3258
3259 old_chain = make_cleanup (null_cleanup, 0);
3260
3261 /* Default to using the current inferior if no pid specified. Note
3262 that inferior_pid may be 0, hence we set okerr. */
3263
3264 pip = find_procinfo (inferior_pid, 1);
3265
3266 if (args != NULL)
3267 {
3268 if ((argv = buildargv (args)) == NULL)
3269 {
3270 nomem (0);
3271 }
3272 make_cleanup (freeargv, (char *) argv);
3273
3274 while (*argv != NULL)
3275 {
3276 argsize = strlen (*argv);
3277 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
3278 {
3279 summary = 0;
3280 all = 1;
3281 }
3282 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
3283 {
3284 summary = 0;
3285 faults = 1;
3286 }
3287 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
3288 {
3289 summary = 0;
3290 flags = 1;
3291 }
3292 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
3293 {
3294 summary = 0;
3295 id = 1;
3296 }
3297 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
3298 {
3299 summary = 0;
3300 mappings = 1;
3301 }
3302 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
3303 {
3304 summary = 0;
3305 signals = 1;
3306 }
3307 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
3308 {
3309 summary = 0;
3310 status = 1;
3311 }
3312 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
3313 {
3314 summary = 0;
3315 syscalls = 1;
3316 }
3317 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
3318 {
3319 summary = 0;
3320 times = 1;
3321 }
3322 else if ((pid = atoi (*argv)) > 0)
3323 {
3324 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
3325 memset (pip, 0, sizeof (*pip));
3326
3327 pip->pid = pid;
3328 if (!open_proc_file (pid, pip, O_RDONLY))
3329 {
3330 perror_with_name (pip -> pathname);
3331 /* NOTREACHED */
3332 }
3333 make_cleanup (close_proc_file, pip);
3334 }
3335 else if (**argv != '\000')
3336 {
3337 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
3338 }
3339 argv++;
3340 }
3341 }
3342
3343 /* If we don't have a valid open process at this point, then we have no
3344 inferior or didn't specify a specific pid. */
3345
3346 if (!pip)
3347 {
3348 error ("\
3349 No process. Start debugging a program or specify an explicit process ID.");
3350 }
3351 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
3352 {
3353 print_sys_errmsg (pip -> pathname, errno);
3354 error ("PIOCSTATUS failed");
3355 }
3356
3357 /* Print verbose information of the requested type(s), or just a summary
3358 of the information for all types. */
3359
3360 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
3361 if (summary || all || flags)
3362 {
3363 info_proc_flags (pip, summary);
3364 }
3365 if (summary || all)
3366 {
3367 info_proc_stop (pip, summary);
3368 }
3369 if (summary || all || signals || faults)
3370 {
3371 info_proc_siginfo (pip, summary);
3372 }
3373 if (summary || all || syscalls)
3374 {
3375 info_proc_syscalls (pip, summary);
3376 }
3377 if (summary || all || mappings)
3378 {
3379 info_proc_mappings (pip, summary);
3380 }
3381 if (summary || all || signals)
3382 {
3383 info_proc_signals (pip, summary);
3384 }
3385 if (summary || all || faults)
3386 {
3387 info_proc_faults (pip, summary);
3388 }
3389 printf_filtered ("\n");
3390
3391 /* All done, deal with closing any temporary process info structure,
3392 freeing temporary memory , etc. */
3393
3394 do_cleanups (old_chain);
3395 }
3396
3397 /*
3398
3399 LOCAL FUNCTION
3400
3401 procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
3402
3403 SYNOPSIS
3404
3405 void procfs_set_sproc_trap (void)
3406
3407 DESCRIPTION
3408
3409 This function sets up a trap on sproc system call exits so that we can
3410 detect the arrival of a new thread. We are called with the child
3411 stopped prior to it's first instruction.
3412
3413 Also note that we turn on the inherit-on-fork flag in the child process
3414 so that any grand-children start with all tracing flags set.
3415 */
3416
3417 #ifdef SYS_sproc
3418
3419 static void
3420 procfs_set_sproc_trap (pi)
3421 struct procinfo *pi;
3422 {
3423 sysset_t exitset;
3424
3425 if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
3426 {
3427 print_sys_errmsg (pi->pathname, errno);
3428 error ("PIOCGEXIT failed");
3429 }
3430
3431 praddset (&exitset, SYS_sproc);
3432
3433 if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
3434 {
3435 print_sys_errmsg (pi->pathname, errno);
3436 error ("PIOCSEXIT failed");
3437 }
3438
3439 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3440 tracing flags set. */
3441
3442 #ifdef PIOCSET /* New method */
3443 {
3444 long pr_flags;
3445 pr_flags = PR_FORK;
3446 ioctl (pi->fd, PIOCSET, &pr_flags);
3447 }
3448 #else
3449 #ifdef PIOCSFORK /* Original method */
3450 ioctl (pi->fd, PIOCSFORK, NULL);
3451 #endif
3452 #endif
3453 }
3454 #endif /* SYS_sproc */
3455
3456 /* Fork an inferior process, and start debugging it with /proc. */
3457
3458 static void
3459 procfs_create_inferior (exec_file, allargs, env)
3460 char *exec_file;
3461 char *allargs;
3462 char **env;
3463 {
3464 fork_inferior (exec_file, allargs, env,
3465 proc_set_exec_trap, procfs_init_inferior);
3466 /* We are at the first instruction we care about. */
3467 /* Pedal to the metal... */
3468
3469 /* Setup traps on exit from sproc() */
3470
3471 #ifdef SYS_sproc
3472 procfs_set_sproc_trap (current_procinfo);
3473 #endif
3474
3475 proceed ((CORE_ADDR) -1, 0, 0);
3476 }
3477
3478 /* Clean up after the inferior dies. */
3479
3480 static void
3481 procfs_mourn_inferior ()
3482 {
3483 struct procinfo *pi;
3484
3485 for (pi = procinfo_list; pi; pi = pi->next)
3486 unconditionally_kill_inferior (pi);
3487
3488 unpush_target (&procfs_ops);
3489 generic_mourn_inferior ();
3490 }
3491
3492 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3493 static int
3494 procfs_can_run ()
3495 {
3496 return(1);
3497 }
3498 \f
3499 struct target_ops procfs_ops = {
3500 "procfs", /* to_shortname */
3501 "Unix /proc child process", /* to_longname */
3502 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3503 procfs_open, /* to_open */
3504 0, /* to_close */
3505 procfs_attach, /* to_attach */
3506 procfs_detach, /* to_detach */
3507 procfs_resume, /* to_resume */
3508 procfs_wait, /* to_wait */
3509 procfs_fetch_registers, /* to_fetch_registers */
3510 procfs_store_registers, /* to_store_registers */
3511 procfs_prepare_to_store, /* to_prepare_to_store */
3512 procfs_xfer_memory, /* to_xfer_memory */
3513 procfs_files_info, /* to_files_info */
3514 memory_insert_breakpoint, /* to_insert_breakpoint */
3515 memory_remove_breakpoint, /* to_remove_breakpoint */
3516 terminal_init_inferior, /* to_terminal_init */
3517 terminal_inferior, /* to_terminal_inferior */
3518 terminal_ours_for_output, /* to_terminal_ours_for_output */
3519 terminal_ours, /* to_terminal_ours */
3520 child_terminal_info, /* to_terminal_info */
3521 procfs_kill_inferior, /* to_kill */
3522 0, /* to_load */
3523 0, /* to_lookup_symbol */
3524 procfs_create_inferior, /* to_create_inferior */
3525 procfs_mourn_inferior, /* to_mourn_inferior */
3526 procfs_can_run, /* to_can_run */
3527 procfs_notice_signals, /* to_notice_signals */
3528 process_stratum, /* to_stratum */
3529 0, /* to_next */
3530 1, /* to_has_all_memory */
3531 1, /* to_has_memory */
3532 1, /* to_has_stack */
3533 1, /* to_has_registers */
3534 1, /* to_has_execution */
3535 0, /* sections */
3536 0, /* sections_end */
3537 OPS_MAGIC /* to_magic */
3538 };
3539
3540 /*
3541
3542 GLOBAL FUNCTION
3543
3544 _initialize_procfs -- initialize the process file system stuff
3545
3546 SYNOPSIS
3547
3548 void _initialize_procfs (void)
3549
3550 DESCRIPTION
3551
3552 Do required initializations during gdb startup for using the
3553 /proc file system interface.
3554
3555 */
3556
3557 void
3558 _initialize_procfs ()
3559 {
3560 add_target (&procfs_ops);
3561
3562 add_info ("proc", info_proc,
3563 "Show process status information using /proc entry.\n\
3564 Specify process id or use current inferior by default.\n\
3565 Specify keywords for detailed information; default is summary.\n\
3566 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3567 `status', `syscalls', and `times'.\n\
3568 Unambiguous abbreviations may be used.");
3569
3570 init_syscall_table ();
3571 }
GDB Binutils - Deliverables
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