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* infrun.c (signals_info), target.c (target_signal_from_name):
[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 /* One trap to exec the shell, one to exec the program being debugged. */
1528 startup_inferior (2);
1529 }
1530
1531 /*
1532
1533 GLOBAL FUNCTION
1534
1535 procfs_notice_signals
1536
1537 SYNOPSIS
1538
1539 static void procfs_notice_signals (int pid);
1540
1541 DESCRIPTION
1542
1543 When the user changes the state of gdb's signal handling via the
1544 "handle" command, this function gets called to see if any change
1545 in the /proc interface is required. It is also called internally
1546 by other /proc interface functions to initialize the state of
1547 the traced signal set.
1548
1549 One thing it does is that signals for which the state is "nostop",
1550 "noprint", and "pass", have their trace bits reset in the pr_trace
1551 field, so that they are no longer traced. This allows them to be
1552 delivered directly to the inferior without the debugger ever being
1553 involved.
1554 */
1555
1556 static void
1557 procfs_notice_signals (pid)
1558 int pid;
1559 {
1560 int signo;
1561 struct procinfo *pi;
1562
1563 pi = find_procinfo (pid, 0);
1564
1565 for (signo = 0; signo < NSIG; signo++)
1566 {
1567 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
1568 signal_print_state (target_signal_from_host (signo)) == 0 &&
1569 signal_pass_state (target_signal_from_host (signo)) == 1)
1570 {
1571 prdelset (&pi->prrun.pr_trace, signo);
1572 }
1573 else
1574 {
1575 praddset (&pi->prrun.pr_trace, signo);
1576 }
1577 }
1578 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
1579 {
1580 print_sys_errmsg ("PIOCSTRACE failed", errno);
1581 }
1582 }
1583
1584 /*
1585
1586 LOCAL FUNCTION
1587
1588 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1589
1590 SYNOPSIS
1591
1592 void proc_set_exec_trap (void)
1593
1594 DESCRIPTION
1595
1596 This function is called in the child process when starting up
1597 an inferior, prior to doing the exec of the actual inferior.
1598 It sets the child process's exitset to make exit from the exec
1599 system call an event of interest to stop on, and then simply
1600 returns. The child does the exec, the system call returns, and
1601 the child stops at the first instruction, ready for the gdb
1602 parent process to take control of it.
1603
1604 NOTE
1605
1606 We need to use all local variables since the child may be sharing
1607 it's data space with the parent, if vfork was used rather than
1608 fork.
1609
1610 Also note that we want to turn off the inherit-on-fork flag in
1611 the child process so that any grand-children start with all
1612 tracing flags cleared.
1613 */
1614
1615 static void
1616 proc_set_exec_trap ()
1617 {
1618 sysset_t exitset;
1619 sysset_t entryset;
1620 auto char procname[32];
1621 int fd;
1622
1623 sprintf (procname, PROC_NAME_FMT, getpid ());
1624 if ((fd = open (procname, O_RDWR)) < 0)
1625 {
1626 perror (procname);
1627 gdb_flush (gdb_stderr);
1628 _exit (127);
1629 }
1630 premptyset (&exitset);
1631 premptyset (&entryset);
1632
1633 /* GW: Rationale...
1634 Not all systems with /proc have all the exec* syscalls with the same
1635 names. On the SGI, for example, there is no SYS_exec, but there
1636 *is* a SYS_execv. So, we try to account for that. */
1637
1638 #ifdef SYS_exec
1639 praddset (&exitset, SYS_exec);
1640 #endif
1641 #ifdef SYS_execve
1642 praddset (&exitset, SYS_execve);
1643 #endif
1644 #ifdef SYS_execv
1645 praddset (&exitset, SYS_execv);
1646 #endif
1647
1648 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1649 {
1650 perror (procname);
1651 gdb_flush (gdb_stderr);
1652 _exit (127);
1653 }
1654
1655 praddset (&entryset, SYS_exit);
1656
1657 if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
1658 {
1659 perror (procname);
1660 gdb_flush (gdb_stderr);
1661 _exit (126);
1662 }
1663
1664 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1665 start with tracing flags cleared. */
1666
1667 #if defined (PIOCRESET) /* New method */
1668 {
1669 long pr_flags;
1670 pr_flags = PR_FORK;
1671 ioctl (fd, PIOCRESET, &pr_flags);
1672 }
1673 #else
1674 #if defined (PIOCRFORK) /* Original method */
1675 ioctl (fd, PIOCRFORK, NULL);
1676 #endif
1677 #endif
1678
1679 /* Turn on run-on-last-close flag so that this process will not hang
1680 if GDB goes away for some reason. */
1681
1682 #if defined (PIOCSET) /* New method */
1683 {
1684 long pr_flags;
1685 pr_flags = PR_RLC;
1686 (void) ioctl (fd, PIOCSET, &pr_flags);
1687 }
1688 #else
1689 #if defined (PIOCSRLC) /* Original method */
1690 (void) ioctl (fd, PIOCSRLC, 0);
1691 #endif
1692 #endif
1693 }
1694
1695 /*
1696
1697 GLOBAL FUNCTION
1698
1699 proc_iterate_over_mappings -- call function for every mapped space
1700
1701 SYNOPSIS
1702
1703 int proc_iterate_over_mappings (int (*func)())
1704
1705 DESCRIPTION
1706
1707 Given a pointer to a function, call that function for every
1708 mapped address space, passing it an open file descriptor for
1709 the file corresponding to that mapped address space (if any)
1710 and the base address of the mapped space. Quit when we hit
1711 the end of the mappings or the function returns nonzero.
1712 */
1713
1714 int
1715 proc_iterate_over_mappings (func)
1716 int (*func) PARAMS ((int, CORE_ADDR));
1717 {
1718 int nmap;
1719 int fd;
1720 int funcstat = 0;
1721 struct prmap *prmaps;
1722 struct prmap *prmap;
1723 struct procinfo *pi;
1724
1725 pi = current_procinfo;
1726
1727 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1728 {
1729 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1730 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1731 {
1732 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1733 {
1734 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
1735 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1736 close (fd);
1737 }
1738 }
1739 }
1740 return (funcstat);
1741 }
1742
1743 #if 0 /* Currently unused */
1744 /*
1745
1746 GLOBAL FUNCTION
1747
1748 proc_base_address -- find base address for segment containing address
1749
1750 SYNOPSIS
1751
1752 CORE_ADDR proc_base_address (CORE_ADDR addr)
1753
1754 DESCRIPTION
1755
1756 Given an address of a location in the inferior, find and return
1757 the base address of the mapped segment containing that address.
1758
1759 This is used for example, by the shared library support code,
1760 where we have the pc value for some location in the shared library
1761 where we are stopped, and need to know the base address of the
1762 segment containing that address.
1763 */
1764
1765 CORE_ADDR
1766 proc_base_address (addr)
1767 CORE_ADDR addr;
1768 {
1769 int nmap;
1770 struct prmap *prmaps;
1771 struct prmap *prmap;
1772 CORE_ADDR baseaddr = 0;
1773 struct procinfo *pi;
1774
1775 pi = current_procinfo;
1776
1777 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1778 {
1779 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1780 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1781 {
1782 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1783 {
1784 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1785 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1786 {
1787 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1788 break;
1789 }
1790 }
1791 }
1792 }
1793 return (baseaddr);
1794 }
1795
1796 #endif /* 0 */
1797
1798 /*
1799
1800 LOCAL FUNCTION
1801
1802 proc_address_to_fd -- return open fd for file mapped to address
1803
1804 SYNOPSIS
1805
1806 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1807
1808 DESCRIPTION
1809
1810 Given an address in the current inferior's address space, use the
1811 /proc interface to find an open file descriptor for the file that
1812 this address was mapped in from. Return -1 if there is no current
1813 inferior. Print a warning message if there is an inferior but
1814 the address corresponds to no file (IE a bogus address).
1815
1816 */
1817
1818 static int
1819 proc_address_to_fd (pi, addr, complain)
1820 struct procinfo *pi;
1821 CORE_ADDR addr;
1822 int complain;
1823 {
1824 int fd = -1;
1825
1826 if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1827 {
1828 if (complain)
1829 {
1830 print_sys_errmsg (pi->pathname, errno);
1831 warning ("can't find mapped file for address 0x%x", addr);
1832 }
1833 }
1834 return (fd);
1835 }
1836
1837
1838 /* Attach to process PID, then initialize for debugging it
1839 and wait for the trace-trap that results from attaching. */
1840
1841 static void
1842 procfs_attach (args, from_tty)
1843 char *args;
1844 int from_tty;
1845 {
1846 char *exec_file;
1847 int pid;
1848
1849 if (!args)
1850 error_no_arg ("process-id to attach");
1851
1852 pid = atoi (args);
1853
1854 if (pid == getpid()) /* Trying to masturbate? */
1855 error ("I refuse to debug myself!");
1856
1857 if (from_tty)
1858 {
1859 exec_file = (char *) get_exec_file (0);
1860
1861 if (exec_file)
1862 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
1863 else
1864 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
1865
1866 gdb_flush (gdb_stdout);
1867 }
1868
1869 do_attach (pid);
1870 inferior_pid = pid;
1871 push_target (&procfs_ops);
1872 }
1873
1874
1875 /* Take a program previously attached to and detaches it.
1876 The program resumes execution and will no longer stop
1877 on signals, etc. We'd better not have left any breakpoints
1878 in the program or it'll die when it hits one. For this
1879 to work, it may be necessary for the process to have been
1880 previously attached. It *might* work if the program was
1881 started via the normal ptrace (PTRACE_TRACEME). */
1882
1883 static void
1884 procfs_detach (args, from_tty)
1885 char *args;
1886 int from_tty;
1887 {
1888 int siggnal = 0;
1889
1890 if (from_tty)
1891 {
1892 char *exec_file = get_exec_file (0);
1893 if (exec_file == 0)
1894 exec_file = "";
1895 printf_unfiltered ("Detaching from program: %s %s\n",
1896 exec_file, target_pid_to_str (inferior_pid));
1897 gdb_flush (gdb_stdout);
1898 }
1899 if (args)
1900 siggnal = atoi (args);
1901
1902 do_detach (siggnal);
1903 inferior_pid = 0;
1904 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
1905 }
1906
1907 /* Get ready to modify the registers array. On machines which store
1908 individual registers, this doesn't need to do anything. On machines
1909 which store all the registers in one fell swoop, this makes sure
1910 that registers contains all the registers from the program being
1911 debugged. */
1912
1913 static void
1914 procfs_prepare_to_store ()
1915 {
1916 #ifdef CHILD_PREPARE_TO_STORE
1917 CHILD_PREPARE_TO_STORE ();
1918 #endif
1919 }
1920
1921 /* Print status information about what we're accessing. */
1922
1923 static void
1924 procfs_files_info (ignore)
1925 struct target_ops *ignore;
1926 {
1927 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
1928 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
1929 }
1930
1931 /* ARGSUSED */
1932 static void
1933 procfs_open (arg, from_tty)
1934 char *arg;
1935 int from_tty;
1936 {
1937 error ("Use the \"run\" command to start a Unix child process.");
1938 }
1939
1940 /*
1941
1942 LOCAL FUNCTION
1943
1944 do_attach -- attach to an already existing process
1945
1946 SYNOPSIS
1947
1948 int do_attach (int pid)
1949
1950 DESCRIPTION
1951
1952 Attach to an already existing process with the specified process
1953 id. If the process is not already stopped, query whether to
1954 stop it or not.
1955
1956 NOTES
1957
1958 The option of stopping at attach time is specific to the /proc
1959 versions of gdb. Versions using ptrace force the attachee
1960 to stop. (I have changed this version to do so, too. All you
1961 have to do is "continue" to make it go on. -- gnu@cygnus.com)
1962
1963 */
1964
1965 static int
1966 do_attach (pid)
1967 int pid;
1968 {
1969 int result;
1970 struct procinfo *pi;
1971
1972 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1973
1974 if (!open_proc_file (pid, pi, O_RDWR))
1975 {
1976 free (pi);
1977 perror_with_name (pi->pathname);
1978 /* NOTREACHED */
1979 }
1980
1981 /* Add new process to process info list */
1982
1983 pi->next = procinfo_list;
1984 procinfo_list = pi;
1985
1986 add_fd (pi); /* Add to list for poll/select */
1987
1988 /* Get current status of process and if it is not already stopped,
1989 then stop it. Remember whether or not it was stopped when we first
1990 examined it. */
1991
1992 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
1993 {
1994 print_sys_errmsg (pi->pathname, errno);
1995 close_proc_file (pi);
1996 error ("PIOCSTATUS failed");
1997 }
1998 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1999 {
2000 pi->was_stopped = 1;
2001 }
2002 else
2003 {
2004 pi->was_stopped = 0;
2005 if (1 || query ("Process is currently running, stop it? "))
2006 {
2007 /* Make it run again when we close it. */
2008 #if defined (PIOCSET) /* New method */
2009 {
2010 long pr_flags;
2011 pr_flags = PR_RLC;
2012 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2013 }
2014 #else
2015 #if defined (PIOCSRLC) /* Original method */
2016 result = ioctl (pi->fd, PIOCSRLC, 0);
2017 #endif
2018 #endif
2019 if (result < 0)
2020 {
2021 print_sys_errmsg (pi->pathname, errno);
2022 close_proc_file (pi);
2023 error ("PIOCSRLC or PIOCSET failed");
2024 }
2025 if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
2026 {
2027 print_sys_errmsg (pi->pathname, errno);
2028 close_proc_file (pi);
2029 error ("PIOCSTOP failed");
2030 }
2031 pi->nopass_next_sigstop = 1;
2032 }
2033 else
2034 {
2035 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
2036 }
2037 }
2038
2039 /* Remember some things about the inferior that we will, or might, change
2040 so that we can restore them when we detach. */
2041
2042 ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
2043 ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
2044 ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
2045 ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
2046 ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
2047
2048 /* Set up trace and fault sets, as gdb expects them. */
2049
2050 memset (&pi->prrun, 0, sizeof (pi->prrun));
2051 prfillset (&pi->prrun.pr_trace);
2052 procfs_notice_signals (pid);
2053 prfillset (&pi->prrun.pr_fault);
2054 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2055 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
2056 {
2057 print_sys_errmsg ("PIOCSFAULT failed", errno);
2058 }
2059 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
2060 {
2061 print_sys_errmsg ("PIOCSTRACE failed", errno);
2062 }
2063 attach_flag = 1;
2064 return (pid);
2065 }
2066
2067 /*
2068
2069 LOCAL FUNCTION
2070
2071 do_detach -- detach from an attached-to process
2072
2073 SYNOPSIS
2074
2075 void do_detach (int signal)
2076
2077 DESCRIPTION
2078
2079 Detach from the current attachee.
2080
2081 If signal is non-zero, the attachee is started running again and sent
2082 the specified signal.
2083
2084 If signal is zero and the attachee was not already stopped when we
2085 attached to it, then we make it runnable again when we detach.
2086
2087 Otherwise, we query whether or not to make the attachee runnable
2088 again, since we may simply want to leave it in the state it was in
2089 when we attached.
2090
2091 We report any problems, but do not consider them errors, since we
2092 MUST detach even if some things don't seem to go right. This may not
2093 be the ideal situation. (FIXME).
2094 */
2095
2096 static void
2097 do_detach (signal)
2098 int signal;
2099 {
2100 int result;
2101 struct procinfo *pi;
2102
2103 pi = current_procinfo;
2104
2105 if (signal)
2106 {
2107 set_proc_siginfo (pi, signal);
2108 }
2109 if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
2110 {
2111 print_sys_errmsg (pi->pathname, errno);
2112 printf_unfiltered ("PIOCSEXIT failed.\n");
2113 }
2114 if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
2115 {
2116 print_sys_errmsg (pi->pathname, errno);
2117 printf_unfiltered ("PIOCSENTRY failed.\n");
2118 }
2119 if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
2120 {
2121 print_sys_errmsg (pi->pathname, errno);
2122 printf_unfiltered ("PIOCSTRACE failed.\n");
2123 }
2124 if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
2125 {
2126 print_sys_errmsg (pi->pathname, errno);
2127 printf_unfiltered ("PIOSCHOLD failed.\n");
2128 }
2129 if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
2130 {
2131 print_sys_errmsg (pi->pathname, errno);
2132 printf_unfiltered ("PIOCSFAULT failed.\n");
2133 }
2134 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2135 {
2136 print_sys_errmsg (pi->pathname, errno);
2137 printf_unfiltered ("PIOCSTATUS failed.\n");
2138 }
2139 else
2140 {
2141 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2142 {
2143 if (signal || !pi->was_stopped ||
2144 query ("Was stopped when attached, make it runnable again? "))
2145 {
2146 /* Clear any fault that might have stopped it. */
2147 if (ioctl (pi->fd, PIOCCFAULT, 0))
2148 {
2149 print_sys_errmsg (pi->pathname, errno);
2150 printf_unfiltered ("PIOCCFAULT failed.\n");
2151 }
2152
2153 /* Make it run again when we close it. */
2154 #if defined (PIOCSET) /* New method */
2155 {
2156 long pr_flags;
2157 pr_flags = PR_RLC;
2158 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2159 }
2160 #else
2161 #if defined (PIOCSRLC) /* Original method */
2162 result = ioctl (pi->fd, PIOCSRLC, 0);
2163 #endif
2164 #endif
2165 if (result)
2166 {
2167 print_sys_errmsg (pi->pathname, errno);
2168 printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
2169 }
2170 }
2171 }
2172 }
2173 close_proc_file (pi);
2174 attach_flag = 0;
2175 }
2176
2177 /* emulate wait() as much as possible.
2178 Wait for child to do something. Return pid of child, or -1 in case
2179 of error; store status in *OURSTATUS.
2180
2181 Not sure why we can't
2182 just use wait(), but it seems to have problems when applied to a
2183 process being controlled with the /proc interface.
2184
2185 We have a race problem here with no obvious solution. We need to let
2186 the inferior run until it stops on an event of interest, which means
2187 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2188 ioctl if the process is already stopped on something that is not an
2189 event of interest, or the call will hang indefinitely. Thus we first
2190 use PIOCSTATUS to see if the process is not stopped. If not, then we
2191 use PIOCWSTOP. But during the window between the two, if the process
2192 stops for any reason that is not an event of interest (such as a job
2193 control signal) then gdb will hang. One possible workaround is to set
2194 an alarm to wake up every minute of so and check to see if the process
2195 is still running, and if so, then reissue the PIOCWSTOP. But this is
2196 a real kludge, so has not been implemented. FIXME: investigate
2197 alternatives.
2198
2199 FIXME: Investigate why wait() seems to have problems with programs
2200 being control by /proc routines. */
2201
2202 static int
2203 procfs_wait (pid, ourstatus)
2204 int pid;
2205 struct target_waitstatus *ourstatus;
2206 {
2207 short what;
2208 short why;
2209 int statval = 0;
2210 int checkerr = 0;
2211 int rtnval = -1;
2212 struct procinfo *pi;
2213
2214 if (pid != -1) /* Non-specific process? */
2215 pi = NULL;
2216 else
2217 for (pi = procinfo_list; pi; pi = pi->next)
2218 if (pi->had_event)
2219 break;
2220
2221 wait_again:
2222
2223 if (!pi)
2224 pi = wait_fd ();
2225
2226 if (pid != -1)
2227 for (pi = procinfo_list; pi; pi = pi->next)
2228 if (pi->pid == pid && pi->had_event)
2229 break;
2230
2231 if (!pi && !checkerr)
2232 goto wait_again;
2233
2234 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2235 {
2236 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
2237 {
2238 checkerr++;
2239 }
2240 }
2241 if (checkerr)
2242 {
2243 if (errno == ENOENT)
2244 {
2245 rtnval = wait (&statval);
2246 if (rtnval != inferior_pid)
2247 {
2248 print_sys_errmsg (pi->pathname, errno);
2249 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
2250 /* NOTREACHED */
2251 }
2252 }
2253 else
2254 {
2255 print_sys_errmsg (pi->pathname, errno);
2256 error ("PIOCSTATUS or PIOCWSTOP failed.");
2257 /* NOTREACHED */
2258 }
2259 }
2260 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2261 {
2262 rtnval = pi->prstatus.pr_pid;
2263 why = pi->prstatus.pr_why;
2264 what = pi->prstatus.pr_what;
2265
2266 switch (why)
2267 {
2268 case PR_SIGNALLED:
2269 statval = (what << 8) | 0177;
2270 break;
2271 case PR_SYSENTRY:
2272 if (what != SYS_exit)
2273 error ("PR_SYSENTRY, unknown system call %d", what);
2274
2275 pi->prrun.pr_flags = PRCFAULT;
2276
2277 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2278 perror_with_name (pi->pathname);
2279
2280 rtnval = wait (&statval);
2281
2282 break;
2283 case PR_SYSEXIT:
2284 switch (what)
2285 {
2286 #ifdef SYS_exec
2287 case SYS_exec:
2288 #endif
2289 #ifdef SYS_execve
2290 case SYS_execve:
2291 #endif
2292 #ifdef SYS_execv
2293 case SYS_execv:
2294 #endif
2295 statval = (SIGTRAP << 8) | 0177;
2296 break;
2297 #ifdef SYS_sproc
2298 case SYS_sproc:
2299 /* We've just detected the completion of an sproc system call. Now we need to
2300 setup a procinfo struct for this thread, and notify the thread system of the
2301 new arrival. */
2302
2303 /* If sproc failed, then nothing interesting happened. Continue the process and
2304 go back to sleep. */
2305
2306 if (pi->prstatus.pr_errno != 0)
2307 {
2308 pi->prrun.pr_flags &= PRSTEP;
2309 pi->prrun.pr_flags |= PRCFAULT;
2310
2311 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2312 perror_with_name (pi->pathname);
2313
2314 goto wait_again;
2315 }
2316
2317 /* At this point, the new thread is stopped at it's first instruction, and
2318 the parent is stopped at the exit from sproc. */
2319
2320 /* Notify the caller of the arrival of a new thread. */
2321 create_procinfo (pi->prstatus.pr_rval1);
2322
2323 rtnval = pi->prstatus.pr_rval1;
2324 statval = (SIGTRAP << 8) | 0177;
2325
2326 break;
2327 #endif /* SYS_sproc */
2328
2329 default:
2330 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
2331 }
2332 break;
2333 case PR_REQUESTED:
2334 statval = (SIGSTOP << 8) | 0177;
2335 break;
2336 case PR_JOBCONTROL:
2337 statval = (what << 8) | 0177;
2338 break;
2339 case PR_FAULTED:
2340 switch (what)
2341 {
2342 case FLTPRIV:
2343 case FLTILL:
2344 statval = (SIGILL << 8) | 0177;
2345 break;
2346 case FLTBPT:
2347 case FLTTRACE:
2348 statval = (SIGTRAP << 8) | 0177;
2349 break;
2350 case FLTSTACK:
2351 case FLTACCESS:
2352 case FLTBOUNDS:
2353 statval = (SIGSEGV << 8) | 0177;
2354 break;
2355 case FLTIOVF:
2356 case FLTIZDIV:
2357 case FLTFPE:
2358 statval = (SIGFPE << 8) | 0177;
2359 break;
2360 case FLTPAGE: /* Recoverable page fault */
2361 default:
2362 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2363 }
2364 break;
2365 default:
2366 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2367 }
2368 /* Stop all the other threads when any of them stops. */
2369
2370 {
2371 struct procinfo *procinfo;
2372
2373 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2374 {
2375 if (!procinfo->had_event)
2376 if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
2377 {
2378 print_sys_errmsg (procinfo->pathname, errno);
2379 error ("PIOCSTOP failed");
2380 }
2381 }
2382 }
2383 }
2384 else
2385 {
2386 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2387 pi->prstatus.pr_flags);
2388 }
2389
2390 store_waitstatus (ourstatus, statval);
2391
2392 if (rtnval == -1) /* No more children to wait for */
2393 {
2394 fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
2395 /* Claim it exited with unknown signal. */
2396 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2397 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
2398 return rtnval;
2399 }
2400
2401 pi->had_event = 0; /* Indicate that we've seen this one */
2402 return (rtnval);
2403 }
2404
2405 /*
2406
2407 LOCAL FUNCTION
2408
2409 set_proc_siginfo - set a process's current signal info
2410
2411 SYNOPSIS
2412
2413 void set_proc_siginfo (struct procinfo *pip, int signo);
2414
2415 DESCRIPTION
2416
2417 Given a pointer to a process info struct in PIP and a signal number
2418 in SIGNO, set the process's current signal and its associated signal
2419 information. The signal will be delivered to the process immediately
2420 after execution is resumed, even if it is being held. In addition,
2421 this particular delivery will not cause another PR_SIGNALLED stop
2422 even if the signal is being traced.
2423
2424 If we are not delivering the same signal that the prstatus siginfo
2425 struct contains information about, then synthesize a siginfo struct
2426 to match the signal we are doing to deliver, make it of the type
2427 "generated by a user process", and send this synthesized copy. When
2428 used to set the inferior's signal state, this will be required if we
2429 are not currently stopped because of a traced signal, or if we decide
2430 to continue with a different signal.
2431
2432 Note that when continuing the inferior from a stop due to receipt
2433 of a traced signal, we either have set PRCSIG to clear the existing
2434 signal, or we have to call this function to do a PIOCSSIG with either
2435 the existing siginfo struct from pr_info, or one we have synthesized
2436 appropriately for the signal we want to deliver. Otherwise if the
2437 signal is still being traced, the inferior will immediately stop
2438 again.
2439
2440 See siginfo(5) for more details.
2441 */
2442
2443 static void
2444 set_proc_siginfo (pip, signo)
2445 struct procinfo *pip;
2446 int signo;
2447 {
2448 struct siginfo newsiginfo;
2449 struct siginfo *sip;
2450
2451 if (signo == pip -> prstatus.pr_info.si_signo)
2452 {
2453 sip = &pip -> prstatus.pr_info;
2454 }
2455 else
2456 {
2457 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2458 sip = &newsiginfo;
2459 sip -> si_signo = signo;
2460 sip -> si_code = 0;
2461 sip -> si_errno = 0;
2462 sip -> si_pid = getpid ();
2463 sip -> si_uid = getuid ();
2464 }
2465 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2466 {
2467 print_sys_errmsg (pip -> pathname, errno);
2468 warning ("PIOCSSIG failed");
2469 }
2470 }
2471
2472 /* Resume execution of process PID. If STEP is nozero, then
2473 just single step it. If SIGNAL is nonzero, restart it with that
2474 signal activated. */
2475
2476 static void
2477 procfs_resume (pid, step, signo)
2478 int pid;
2479 int step;
2480 enum target_signal signo;
2481 {
2482 int signal_to_pass;
2483 struct procinfo *pi, *procinfo;
2484
2485 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
2486
2487 errno = 0;
2488 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2489
2490 #if 0
2491 /* It should not be necessary. If the user explicitly changes the value,
2492 value_assign calls write_register_bytes, which writes it. */
2493 /* It may not be absolutely necessary to specify the PC value for
2494 restarting, but to be safe we use the value that gdb considers
2495 to be current. One case where this might be necessary is if the
2496 user explicitly changes the PC value that gdb considers to be
2497 current. FIXME: Investigate if this is necessary or not. */
2498
2499 #ifdef PRSVADDR_BROKEN
2500 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2501 place to put nPC. In fact, if you use this, nPC seems to be set to some
2502 random garbage. We have to rely on the fact that PC and nPC have been
2503 written previously via PIOCSREG during a register flush. */
2504
2505 pi->prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
2506 pi->prrun.pr_flags != PRSVADDR;
2507 #endif
2508 #endif
2509
2510 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
2511 /* When attaching to a child process, if we forced it to stop with
2512 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2513 Upon resuming the first time after such a stop, we explicitly
2514 inhibit sending it another SIGSTOP, which would be the normal
2515 result of default signal handling. One potential drawback to
2516 this is that we will also ignore any attempt to by the user
2517 to explicitly continue after the attach with a SIGSTOP. Ultimately
2518 this problem should be dealt with by making the routines that
2519 deal with the inferior a little smarter, and possibly even allow
2520 an inferior to continue running at the same time as gdb. (FIXME?) */
2521 signal_to_pass = 0;
2522 else if (signo == TARGET_SIGNAL_TSTP
2523 && pi->prstatus.pr_cursig == SIGTSTP
2524 && pi->prstatus.pr_action.sa_handler == SIG_DFL)
2525
2526 /* We are about to pass the inferior a SIGTSTP whose action is
2527 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2528 (notifying the parent via wait()), and then keep going from the
2529 same place when the parent is ready for you to keep going. So
2530 under the debugger, it should do nothing (as if the program had
2531 been stopped and then later resumed. Under ptrace, this
2532 happens for us, but under /proc, the system obligingly stops
2533 the process, and wait_for_inferior would have no way of
2534 distinguishing that type of stop (which indicates that we
2535 should just start it again), with a stop due to the pr_trace
2536 field of the prrun_t struct.
2537
2538 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2539 because the handler needs to get executed. */
2540 signal_to_pass = 0;
2541 else
2542 signal_to_pass = target_signal_to_host (signo);
2543
2544 if (signal_to_pass)
2545 {
2546 set_proc_siginfo (pi, signal_to_pass);
2547 }
2548 else
2549 {
2550 pi->prrun.pr_flags |= PRCSIG;
2551 }
2552 pi->nopass_next_sigstop = 0;
2553 if (step)
2554 {
2555 pi->prrun.pr_flags |= PRSTEP;
2556 }
2557 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2558 {
2559 perror_with_name (pi->pathname);
2560 /* NOTREACHED */
2561 }
2562
2563 pi->had_event = 0;
2564
2565 /* Continue all the other threads that haven't had an event of
2566 interest. */
2567
2568 if (pid == -1)
2569 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2570 {
2571 if (pi != procinfo && !procinfo->had_event)
2572 {
2573 procinfo->prrun.pr_flags &= PRSTEP;
2574 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
2575 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2576 if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
2577 {
2578 if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
2579 {
2580 fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
2581 }
2582 print_sys_errmsg (procinfo->pathname, errno);
2583 error ("PIOCRUN failed");
2584 }
2585 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2586 }
2587 }
2588 }
2589
2590 /*
2591
2592 LOCAL FUNCTION
2593
2594 procfs_fetch_registers -- fetch current registers from inferior
2595
2596 SYNOPSIS
2597
2598 void procfs_fetch_registers (int regno)
2599
2600 DESCRIPTION
2601
2602 Read the current values of the inferior's registers, both the
2603 general register set and floating point registers (if supported)
2604 and update gdb's idea of their current values.
2605
2606 */
2607
2608 static void
2609 procfs_fetch_registers (regno)
2610 int regno;
2611 {
2612 struct procinfo *pi;
2613
2614 pi = current_procinfo;
2615
2616 if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
2617 {
2618 supply_gregset (&pi->gregset);
2619 }
2620 #if defined (FP0_REGNUM)
2621 if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
2622 {
2623 supply_fpregset (&pi->fpregset);
2624 }
2625 #endif
2626 }
2627
2628 /*
2629
2630 LOCAL FUNCTION
2631
2632 proc_init_failed - called whenever /proc access initialization
2633 fails
2634
2635 SYNOPSIS
2636
2637 static void proc_init_failed (struct procinfo *pi, char *why)
2638
2639 DESCRIPTION
2640
2641 This function is called whenever initialization of access to a /proc
2642 entry fails. It prints a suitable error message, does some cleanup,
2643 and then invokes the standard error processing routine which dumps
2644 us back into the command loop.
2645 */
2646
2647 static void
2648 proc_init_failed (pi, why)
2649 struct procinfo *pi;
2650 char *why;
2651 {
2652 print_sys_errmsg (pi->pathname, errno);
2653 kill (pi->pid, SIGKILL);
2654 close_proc_file (pi);
2655 error (why);
2656 /* NOTREACHED */
2657 }
2658
2659 /*
2660
2661 LOCAL FUNCTION
2662
2663 close_proc_file - close any currently open /proc entry
2664
2665 SYNOPSIS
2666
2667 static void close_proc_file (struct procinfo *pip)
2668
2669 DESCRIPTION
2670
2671 Close any currently open /proc entry and mark the process information
2672 entry as invalid. In order to ensure that we don't try to reuse any
2673 stale information, the pid, fd, and pathnames are explicitly
2674 invalidated, which may be overkill.
2675
2676 */
2677
2678 static void
2679 close_proc_file (pip)
2680 struct procinfo *pip;
2681 {
2682 struct procinfo *procinfo;
2683
2684 remove_fd (pip); /* Remove fd from poll/select list */
2685
2686 close (pip -> fd);
2687
2688 free (pip -> pathname);
2689
2690 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2691
2692 if (procinfo_list == pip)
2693 procinfo_list = pip->next;
2694 else
2695 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2696 if (procinfo->next == pip)
2697 procinfo->next = pip->next;
2698
2699 free (pip);
2700 }
2701
2702 /*
2703
2704 LOCAL FUNCTION
2705
2706 open_proc_file - open a /proc entry for a given process id
2707
2708 SYNOPSIS
2709
2710 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2711
2712 DESCRIPTION
2713
2714 Given a process id and a mode, close the existing open /proc
2715 entry (if any) and open one for the new process id, in the
2716 specified mode. Once it is open, then mark the local process
2717 information structure as valid, which guarantees that the pid,
2718 fd, and pathname fields match an open /proc entry. Returns
2719 zero if the open fails, nonzero otherwise.
2720
2721 Note that the pathname is left intact, even when the open fails,
2722 so that callers can use it to construct meaningful error messages
2723 rather than just "file open failed".
2724 */
2725
2726 static int
2727 open_proc_file (pid, pip, mode)
2728 int pid;
2729 struct procinfo *pip;
2730 int mode;
2731 {
2732 pip -> next = NULL;
2733 pip -> had_event = 0;
2734 pip -> pathname = xmalloc (32);
2735 pip -> pid = pid;
2736
2737 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2738 if ((pip -> fd = open (pip -> pathname, mode)) < 0)
2739 return 0;
2740
2741 return 1;
2742 }
2743
2744 static char *
2745 mappingflags (flags)
2746 long flags;
2747 {
2748 static char asciiflags[8];
2749
2750 strcpy (asciiflags, "-------");
2751 #if defined (MA_PHYS)
2752 if (flags & MA_PHYS) asciiflags[0] = 'd';
2753 #endif
2754 if (flags & MA_STACK) asciiflags[1] = 's';
2755 if (flags & MA_BREAK) asciiflags[2] = 'b';
2756 if (flags & MA_SHARED) asciiflags[3] = 's';
2757 if (flags & MA_READ) asciiflags[4] = 'r';
2758 if (flags & MA_WRITE) asciiflags[5] = 'w';
2759 if (flags & MA_EXEC) asciiflags[6] = 'x';
2760 return (asciiflags);
2761 }
2762
2763 static void
2764 info_proc_flags (pip, summary)
2765 struct procinfo *pip;
2766 int summary;
2767 {
2768 struct trans *transp;
2769
2770 printf_filtered ("%-32s", "Process status flags:");
2771 if (!summary)
2772 {
2773 printf_filtered ("\n\n");
2774 }
2775 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2776 {
2777 if (pip -> prstatus.pr_flags & transp -> value)
2778 {
2779 if (summary)
2780 {
2781 printf_filtered ("%s ", transp -> name);
2782 }
2783 else
2784 {
2785 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2786 }
2787 }
2788 }
2789 printf_filtered ("\n");
2790 }
2791
2792 static void
2793 info_proc_stop (pip, summary)
2794 struct procinfo *pip;
2795 int summary;
2796 {
2797 struct trans *transp;
2798 int why;
2799 int what;
2800
2801 why = pip -> prstatus.pr_why;
2802 what = pip -> prstatus.pr_what;
2803
2804 if (pip -> prstatus.pr_flags & PR_STOPPED)
2805 {
2806 printf_filtered ("%-32s", "Reason for stopping:");
2807 if (!summary)
2808 {
2809 printf_filtered ("\n\n");
2810 }
2811 for (transp = pr_why_table; transp -> name != NULL; transp++)
2812 {
2813 if (why == transp -> value)
2814 {
2815 if (summary)
2816 {
2817 printf_filtered ("%s ", transp -> name);
2818 }
2819 else
2820 {
2821 printf_filtered ("\t%-16s %s.\n",
2822 transp -> name, transp -> desc);
2823 }
2824 break;
2825 }
2826 }
2827
2828 /* Use the pr_why field to determine what the pr_what field means, and
2829 print more information. */
2830
2831 switch (why)
2832 {
2833 case PR_REQUESTED:
2834 /* pr_what is unused for this case */
2835 break;
2836 case PR_JOBCONTROL:
2837 case PR_SIGNALLED:
2838 if (summary)
2839 {
2840 printf_filtered ("%s ", signalname (what));
2841 }
2842 else
2843 {
2844 printf_filtered ("\t%-16s %s.\n", signalname (what),
2845 safe_strsignal (what));
2846 }
2847 break;
2848 case PR_SYSENTRY:
2849 if (summary)
2850 {
2851 printf_filtered ("%s ", syscallname (what));
2852 }
2853 else
2854 {
2855 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2856 "Entered this system call");
2857 }
2858 break;
2859 case PR_SYSEXIT:
2860 if (summary)
2861 {
2862 printf_filtered ("%s ", syscallname (what));
2863 }
2864 else
2865 {
2866 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2867 "Returned from this system call");
2868 }
2869 break;
2870 case PR_FAULTED:
2871 if (summary)
2872 {
2873 printf_filtered ("%s ",
2874 lookupname (faults_table, what, "fault"));
2875 }
2876 else
2877 {
2878 printf_filtered ("\t%-16s %s.\n",
2879 lookupname (faults_table, what, "fault"),
2880 lookupdesc (faults_table, what));
2881 }
2882 break;
2883 }
2884 printf_filtered ("\n");
2885 }
2886 }
2887
2888 static void
2889 info_proc_siginfo (pip, summary)
2890 struct procinfo *pip;
2891 int summary;
2892 {
2893 struct siginfo *sip;
2894
2895 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2896 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2897 pip -> prstatus.pr_why == PR_FAULTED))
2898 {
2899 printf_filtered ("%-32s", "Additional signal/fault info:");
2900 sip = &pip -> prstatus.pr_info;
2901 if (summary)
2902 {
2903 printf_filtered ("%s ", signalname (sip -> si_signo));
2904 if (sip -> si_errno > 0)
2905 {
2906 printf_filtered ("%s ", errnoname (sip -> si_errno));
2907 }
2908 if (sip -> si_code <= 0)
2909 {
2910 printf_filtered ("sent by %s, uid %d ",
2911 target_pid_to_str (sip -> si_pid),
2912 sip -> si_uid);
2913 }
2914 else
2915 {
2916 printf_filtered ("%s ", sigcodename (sip));
2917 if ((sip -> si_signo == SIGILL) ||
2918 (sip -> si_signo == SIGFPE) ||
2919 (sip -> si_signo == SIGSEGV) ||
2920 (sip -> si_signo == SIGBUS))
2921 {
2922 printf_filtered ("addr=%#x ", sip -> si_addr);
2923 }
2924 else if ((sip -> si_signo == SIGCHLD))
2925 {
2926 printf_filtered ("child %s, status %u ",
2927 target_pid_to_str (sip -> si_pid),
2928 sip -> si_status);
2929 }
2930 else if ((sip -> si_signo == SIGPOLL))
2931 {
2932 printf_filtered ("band %u ", sip -> si_band);
2933 }
2934 }
2935 }
2936 else
2937 {
2938 printf_filtered ("\n\n");
2939 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
2940 safe_strsignal (sip -> si_signo));
2941 if (sip -> si_errno > 0)
2942 {
2943 printf_filtered ("\t%-16s %s.\n",
2944 errnoname (sip -> si_errno),
2945 safe_strerror (sip -> si_errno));
2946 }
2947 if (sip -> si_code <= 0)
2948 {
2949 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2950 "PID of process sending signal");
2951 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2952 "UID of process sending signal");
2953 }
2954 else
2955 {
2956 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2957 sigcodedesc (sip));
2958 if ((sip -> si_signo == SIGILL) ||
2959 (sip -> si_signo == SIGFPE))
2960 {
2961 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2962 "Address of faulting instruction");
2963 }
2964 else if ((sip -> si_signo == SIGSEGV) ||
2965 (sip -> si_signo == SIGBUS))
2966 {
2967 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2968 "Address of faulting memory reference");
2969 }
2970 else if ((sip -> si_signo == SIGCHLD))
2971 {
2972 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2973 "Child process ID");
2974 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2975 "Child process exit value or signal");
2976 }
2977 else if ((sip -> si_signo == SIGPOLL))
2978 {
2979 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2980 "Band event for POLL_{IN,OUT,MSG}");
2981 }
2982 }
2983 }
2984 printf_filtered ("\n");
2985 }
2986 }
2987
2988 static void
2989 info_proc_syscalls (pip, summary)
2990 struct procinfo *pip;
2991 int summary;
2992 {
2993 int syscallnum;
2994
2995 if (!summary)
2996 {
2997
2998 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
2999 if (pip -> prstatus.pr_flags & PR_ASLEEP)
3000 {
3001 int syscallnum = pip -> prstatus.pr_reg[R_D0];
3002 if (summary)
3003 {
3004 printf_filtered ("%-32s", "Sleeping in system call:");
3005 printf_filtered ("%s", syscallname (syscallnum));
3006 }
3007 else
3008 {
3009 printf_filtered ("Sleeping in system call '%s'.\n",
3010 syscallname (syscallnum));
3011 }
3012 }
3013 #endif
3014
3015 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
3016 {
3017 print_sys_errmsg (pip -> pathname, errno);
3018 error ("PIOCGENTRY failed");
3019 }
3020
3021 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
3022 {
3023 print_sys_errmsg (pip -> pathname, errno);
3024 error ("PIOCGEXIT failed");
3025 }
3026
3027 printf_filtered ("System call tracing information:\n\n");
3028
3029 printf_filtered ("\t%-12s %-8s %-8s\n",
3030 "System call",
3031 "Entry",
3032 "Exit");
3033 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
3034 {
3035 QUIT;
3036 if (syscall_table[syscallnum] != NULL)
3037 {
3038 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
3039 printf_filtered ("%-8s ",
3040 prismember (&pip -> entryset, syscallnum)
3041 ? "on" : "off");
3042 printf_filtered ("%-8s ",
3043 prismember (&pip -> exitset, syscallnum)
3044 ? "on" : "off");
3045 printf_filtered ("\n");
3046 }
3047 }
3048 printf_filtered ("\n");
3049 }
3050 }
3051
3052 static char *
3053 signalname (signo)
3054 int signo;
3055 {
3056 char *name;
3057 static char locbuf[32];
3058
3059 name = strsigno (signo);
3060 if (name == NULL)
3061 {
3062 sprintf (locbuf, "Signal %d", signo);
3063 }
3064 else
3065 {
3066 sprintf (locbuf, "%s (%d)", name, signo);
3067 }
3068 return (locbuf);
3069 }
3070
3071 static char *
3072 errnoname (errnum)
3073 int errnum;
3074 {
3075 char *name;
3076 static char locbuf[32];
3077
3078 name = strerrno (errnum);
3079 if (name == NULL)
3080 {
3081 sprintf (locbuf, "Errno %d", errnum);
3082 }
3083 else
3084 {
3085 sprintf (locbuf, "%s (%d)", name, errnum);
3086 }
3087 return (locbuf);
3088 }
3089
3090 static void
3091 info_proc_signals (pip, summary)
3092 struct procinfo *pip;
3093 int summary;
3094 {
3095 int signo;
3096
3097 if (!summary)
3098 {
3099 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
3100 {
3101 print_sys_errmsg (pip -> pathname, errno);
3102 error ("PIOCGTRACE failed");
3103 }
3104
3105 printf_filtered ("Disposition of signals:\n\n");
3106 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3107 "Signal", "Trace", "Hold", "Pending", "Description");
3108 for (signo = 0; signo < NSIG; signo++)
3109 {
3110 QUIT;
3111 printf_filtered ("\t%-15s ", signalname (signo));
3112 printf_filtered ("%-8s ",
3113 prismember (&pip -> trace, signo)
3114 ? "on" : "off");
3115 printf_filtered ("%-8s ",
3116 prismember (&pip -> prstatus.pr_sighold, signo)
3117 ? "on" : "off");
3118 printf_filtered ("%-8s ",
3119 prismember (&pip -> prstatus.pr_sigpend, signo)
3120 ? "yes" : "no");
3121 printf_filtered (" %s\n", safe_strsignal (signo));
3122 }
3123 printf_filtered ("\n");
3124 }
3125 }
3126
3127 static void
3128 info_proc_faults (pip, summary)
3129 struct procinfo *pip;
3130 int summary;
3131 {
3132 struct trans *transp;
3133
3134 if (!summary)
3135 {
3136 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
3137 {
3138 print_sys_errmsg (pip -> pathname, errno);
3139 error ("PIOCGFAULT failed");
3140 }
3141
3142 printf_filtered ("Current traced hardware fault set:\n\n");
3143 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3144
3145 for (transp = faults_table; transp -> name != NULL; transp++)
3146 {
3147 QUIT;
3148 printf_filtered ("\t%-12s ", transp -> name);
3149 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
3150 ? "on" : "off");
3151 printf_filtered ("\n");
3152 }
3153 printf_filtered ("\n");
3154 }
3155 }
3156
3157 static void
3158 info_proc_mappings (pip, summary)
3159 struct procinfo *pip;
3160 int summary;
3161 {
3162 int nmap;
3163 struct prmap *prmaps;
3164 struct prmap *prmap;
3165
3166 if (!summary)
3167 {
3168 printf_filtered ("Mapped address spaces:\n\n");
3169 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3170 "Start Addr",
3171 " End Addr",
3172 " Size",
3173 " Offset",
3174 "Flags");
3175 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
3176 {
3177 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3178 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
3179 {
3180 for (prmap = prmaps; prmap -> pr_size; ++prmap)
3181 {
3182 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
3183 prmap -> pr_vaddr,
3184 prmap -> pr_vaddr + prmap -> pr_size - 1,
3185 prmap -> pr_size,
3186 prmap -> pr_off,
3187 mappingflags (prmap -> pr_mflags));
3188 }
3189 }
3190 }
3191 printf_filtered ("\n");
3192 }
3193 }
3194
3195 /*
3196
3197 LOCAL FUNCTION
3198
3199 info_proc -- implement the "info proc" command
3200
3201 SYNOPSIS
3202
3203 void info_proc (char *args, int from_tty)
3204
3205 DESCRIPTION
3206
3207 Implement gdb's "info proc" command by using the /proc interface
3208 to print status information about any currently running process.
3209
3210 Examples of the use of "info proc" are:
3211
3212 info proc (prints summary info for current inferior)
3213 info proc 123 (prints summary info for process with pid 123)
3214 info proc mappings (prints address mappings)
3215 info proc times (prints process/children times)
3216 info proc id (prints pid, ppid, gid, sid, etc)
3217 FIXME: i proc id not implemented.
3218 info proc status (prints general process state info)
3219 FIXME: i proc status not implemented.
3220 info proc signals (prints info about signal handling)
3221 info proc all (prints all info)
3222
3223 */
3224
3225 static void
3226 info_proc (args, from_tty)
3227 char *args;
3228 int from_tty;
3229 {
3230 int pid;
3231 struct procinfo *pip;
3232 struct cleanup *old_chain;
3233 char **argv;
3234 int argsize;
3235 int summary = 1;
3236 int flags = 0;
3237 int syscalls = 0;
3238 int signals = 0;
3239 int faults = 0;
3240 int mappings = 0;
3241 int times = 0;
3242 int id = 0;
3243 int status = 0;
3244 int all = 0;
3245
3246 old_chain = make_cleanup (null_cleanup, 0);
3247
3248 /* Default to using the current inferior if no pid specified. Note
3249 that inferior_pid may be 0, hence we set okerr. */
3250
3251 pip = find_procinfo (inferior_pid, 1);
3252
3253 if (args != NULL)
3254 {
3255 if ((argv = buildargv (args)) == NULL)
3256 {
3257 nomem (0);
3258 }
3259 make_cleanup (freeargv, (char *) argv);
3260
3261 while (*argv != NULL)
3262 {
3263 argsize = strlen (*argv);
3264 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
3265 {
3266 summary = 0;
3267 all = 1;
3268 }
3269 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
3270 {
3271 summary = 0;
3272 faults = 1;
3273 }
3274 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
3275 {
3276 summary = 0;
3277 flags = 1;
3278 }
3279 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
3280 {
3281 summary = 0;
3282 id = 1;
3283 }
3284 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
3285 {
3286 summary = 0;
3287 mappings = 1;
3288 }
3289 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
3290 {
3291 summary = 0;
3292 signals = 1;
3293 }
3294 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
3295 {
3296 summary = 0;
3297 status = 1;
3298 }
3299 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
3300 {
3301 summary = 0;
3302 syscalls = 1;
3303 }
3304 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
3305 {
3306 summary = 0;
3307 times = 1;
3308 }
3309 else if ((pid = atoi (*argv)) > 0)
3310 {
3311 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
3312 memset (pip, 0, sizeof (*pip));
3313
3314 pip->pid = pid;
3315 if (!open_proc_file (pid, pip, O_RDONLY))
3316 {
3317 perror_with_name (pip -> pathname);
3318 /* NOTREACHED */
3319 }
3320 make_cleanup (close_proc_file, pip);
3321 }
3322 else if (**argv != '\000')
3323 {
3324 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
3325 }
3326 argv++;
3327 }
3328 }
3329
3330 /* If we don't have a valid open process at this point, then we have no
3331 inferior or didn't specify a specific pid. */
3332
3333 if (!pip)
3334 {
3335 error ("\
3336 No process. Start debugging a program or specify an explicit process ID.");
3337 }
3338 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
3339 {
3340 print_sys_errmsg (pip -> pathname, errno);
3341 error ("PIOCSTATUS failed");
3342 }
3343
3344 /* Print verbose information of the requested type(s), or just a summary
3345 of the information for all types. */
3346
3347 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
3348 if (summary || all || flags)
3349 {
3350 info_proc_flags (pip, summary);
3351 }
3352 if (summary || all)
3353 {
3354 info_proc_stop (pip, summary);
3355 }
3356 if (summary || all || signals || faults)
3357 {
3358 info_proc_siginfo (pip, summary);
3359 }
3360 if (summary || all || syscalls)
3361 {
3362 info_proc_syscalls (pip, summary);
3363 }
3364 if (summary || all || mappings)
3365 {
3366 info_proc_mappings (pip, summary);
3367 }
3368 if (summary || all || signals)
3369 {
3370 info_proc_signals (pip, summary);
3371 }
3372 if (summary || all || faults)
3373 {
3374 info_proc_faults (pip, summary);
3375 }
3376 printf_filtered ("\n");
3377
3378 /* All done, deal with closing any temporary process info structure,
3379 freeing temporary memory , etc. */
3380
3381 do_cleanups (old_chain);
3382 }
3383
3384 /*
3385
3386 LOCAL FUNCTION
3387
3388 procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
3389
3390 SYNOPSIS
3391
3392 void procfs_set_sproc_trap (void)
3393
3394 DESCRIPTION
3395
3396 This function sets up a trap on sproc system call exits so that we can
3397 detect the arrival of a new thread. We are called with the child
3398 stopped prior to it's first instruction.
3399
3400 Also note that we turn on the inherit-on-fork flag in the child process
3401 so that any grand-children start with all tracing flags set.
3402 */
3403
3404 #ifdef SYS_sproc
3405
3406 static void
3407 procfs_set_sproc_trap (pi)
3408 struct procinfo *pi;
3409 {
3410 sysset_t exitset;
3411
3412 if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
3413 {
3414 print_sys_errmsg (pi->pathname, errno);
3415 error ("PIOCGEXIT failed");
3416 }
3417
3418 praddset (&exitset, SYS_sproc);
3419
3420 if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
3421 {
3422 print_sys_errmsg (pi->pathname, errno);
3423 error ("PIOCSEXIT failed");
3424 }
3425
3426 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3427 tracing flags set. */
3428
3429 #ifdef PIOCSET /* New method */
3430 {
3431 long pr_flags;
3432 pr_flags = PR_FORK;
3433 ioctl (pi->fd, PIOCSET, &pr_flags);
3434 }
3435 #else
3436 #ifdef PIOCSFORK /* Original method */
3437 ioctl (pi->fd, PIOCSFORK, NULL);
3438 #endif
3439 #endif
3440 }
3441 #endif /* SYS_sproc */
3442
3443 /* Fork an inferior process, and start debugging it with /proc. */
3444
3445 static void
3446 procfs_create_inferior (exec_file, allargs, env)
3447 char *exec_file;
3448 char *allargs;
3449 char **env;
3450 {
3451 fork_inferior (exec_file, allargs, env,
3452 proc_set_exec_trap, procfs_init_inferior);
3453 /* We are at the first instruction we care about. */
3454 /* Pedal to the metal... */
3455
3456 /* Setup traps on exit from sproc() */
3457
3458 #ifdef SYS_sproc
3459 procfs_set_sproc_trap (current_procinfo);
3460 #endif
3461
3462 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
3463 }
3464
3465 /* Clean up after the inferior dies. */
3466
3467 static void
3468 procfs_mourn_inferior ()
3469 {
3470 struct procinfo *pi;
3471
3472 for (pi = procinfo_list; pi; pi = pi->next)
3473 unconditionally_kill_inferior (pi);
3474
3475 unpush_target (&procfs_ops);
3476 generic_mourn_inferior ();
3477 }
3478
3479 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3480 static int
3481 procfs_can_run ()
3482 {
3483 return(1);
3484 }
3485 \f
3486 struct target_ops procfs_ops = {
3487 "procfs", /* to_shortname */
3488 "Unix /proc child process", /* to_longname */
3489 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3490 procfs_open, /* to_open */
3491 0, /* to_close */
3492 procfs_attach, /* to_attach */
3493 procfs_detach, /* to_detach */
3494 procfs_resume, /* to_resume */
3495 procfs_wait, /* to_wait */
3496 procfs_fetch_registers, /* to_fetch_registers */
3497 procfs_store_registers, /* to_store_registers */
3498 procfs_prepare_to_store, /* to_prepare_to_store */
3499 procfs_xfer_memory, /* to_xfer_memory */
3500 procfs_files_info, /* to_files_info */
3501 memory_insert_breakpoint, /* to_insert_breakpoint */
3502 memory_remove_breakpoint, /* to_remove_breakpoint */
3503 terminal_init_inferior, /* to_terminal_init */
3504 terminal_inferior, /* to_terminal_inferior */
3505 terminal_ours_for_output, /* to_terminal_ours_for_output */
3506 terminal_ours, /* to_terminal_ours */
3507 child_terminal_info, /* to_terminal_info */
3508 procfs_kill_inferior, /* to_kill */
3509 0, /* to_load */
3510 0, /* to_lookup_symbol */
3511 procfs_create_inferior, /* to_create_inferior */
3512 procfs_mourn_inferior, /* to_mourn_inferior */
3513 procfs_can_run, /* to_can_run */
3514 procfs_notice_signals, /* to_notice_signals */
3515 process_stratum, /* to_stratum */
3516 0, /* to_next */
3517 1, /* to_has_all_memory */
3518 1, /* to_has_memory */
3519 1, /* to_has_stack */
3520 1, /* to_has_registers */
3521 1, /* to_has_execution */
3522 0, /* sections */
3523 0, /* sections_end */
3524 OPS_MAGIC /* to_magic */
3525 };
3526
3527 void
3528 _initialize_procfs ()
3529 {
3530 add_target (&procfs_ops);
3531
3532 add_info ("proc", info_proc,
3533 "Show process status information using /proc entry.\n\
3534 Specify process id or use current inferior by default.\n\
3535 Specify keywords for detailed information; default is summary.\n\
3536 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3537 `status', `syscalls', and `times'.\n\
3538 Unambiguous abbreviations may be used.");
3539
3540 init_syscall_table ();
3541 }