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* breakpoint.h (enum bptype): Add bp_hardware_watchpoint and
[deliverable/binutils-gdb.git] / gdb / procfs.c
1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20
21
22 /* N O T E S
23
24 For information on the details of using /proc consult section proc(4)
25 in the UNIX System V Release 4 System Administrator's Reference Manual.
26
27 The general register and floating point register sets are manipulated by
28 separate ioctl's. This file makes the assumption that if FP0_REGNUM is
29 defined, then support for the floating point register set is desired,
30 regardless of whether or not the actual target has floating point hardware.
31
32 */
33
34
35 #include "defs.h"
36
37 #include <sys/types.h>
38 #include <time.h>
39 #include <sys/procfs.h>
40 #include <fcntl.h>
41 #include <errno.h>
42 #include <string.h>
43 #include <stropts.h>
44 #include <poll.h>
45 #include <unistd.h>
46 #include <sys/stat.h>
47
48 #include "inferior.h"
49 #include "target.h"
50 #include "command.h"
51 #include "gdbcore.h"
52
53 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
54
55 #ifndef PROC_NAME_FMT
56 #define PROC_NAME_FMT "/proc/%05d"
57 #endif
58
59 extern struct target_ops procfs_ops; /* Forward declaration */
60
61 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
62 CORE_ADDR kernel_u_addr;
63 #endif
64
65 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
66 #undef si_pid
67 #define si_pid _data._proc.pid
68 #undef si_uid
69 #define si_uid _data._proc._pdata._kill.uid
70 #endif /* BROKEN_SIGINFO_H */
71
72 /* All access to the inferior, either one started by gdb or one that has
73 been attached to, is controlled by an instance of a procinfo structure,
74 defined below. Since gdb currently only handles one inferior at a time,
75 the procinfo structure for the inferior is statically allocated and
76 only one exists at any given time. There is a separate procinfo
77 structure for use by the "info proc" command, so that we can print
78 useful information about any random process without interfering with
79 the inferior's procinfo information. */
80
81 struct procinfo {
82 struct procinfo *next;
83 int pid; /* Process ID of inferior */
84 int fd; /* File descriptor for /proc entry */
85 char *pathname; /* Pathname to /proc entry */
86 int had_event; /* poll/select says something happened */
87 int was_stopped; /* Nonzero if was stopped prior to attach */
88 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
89 prrun_t prrun; /* Control state when it is run */
90 prstatus_t prstatus; /* Current process status info */
91 gregset_t gregset; /* General register set */
92 fpregset_t fpregset; /* Floating point register set */
93 fltset_t fltset; /* Current traced hardware fault set */
94 sigset_t trace; /* Current traced signal set */
95 sysset_t exitset; /* Current traced system call exit set */
96 sysset_t entryset; /* Current traced system call entry set */
97 fltset_t saved_fltset; /* Saved traced hardware fault set */
98 sigset_t saved_trace; /* Saved traced signal set */
99 sigset_t saved_sighold; /* Saved held signal set */
100 sysset_t saved_exitset; /* Saved traced system call exit set */
101 sysset_t saved_entryset; /* Saved traced system call entry set */
102 };
103
104 /* List of inferior process information */
105 static struct procinfo *procinfo_list = NULL;
106
107 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
108
109 static int num_poll_list = 0; /* Number of entries in poll_list */
110
111 static int last_resume_pid = -1; /* Last pid used with procfs_resume */
112
113 /* Much of the information used in the /proc interface, particularly for
114 printing status information, is kept as tables of structures of the
115 following form. These tables can be used to map numeric values to
116 their symbolic names and to a string that describes their specific use. */
117
118 struct trans {
119 int value; /* The numeric value */
120 char *name; /* The equivalent symbolic value */
121 char *desc; /* Short description of value */
122 };
123
124 /* Translate bits in the pr_flags member of the prstatus structure, into the
125 names and desc information. */
126
127 static struct trans pr_flag_table[] =
128 {
129 #if defined (PR_STOPPED)
130 PR_STOPPED, "PR_STOPPED", "Process is stopped",
131 #endif
132 #if defined (PR_ISTOP)
133 PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
134 #endif
135 #if defined (PR_DSTOP)
136 PR_DSTOP, "PR_DSTOP", "A stop directive is in effect",
137 #endif
138 #if defined (PR_ASLEEP)
139 PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call",
140 #endif
141 #if defined (PR_FORK)
142 PR_FORK, "PR_FORK", "Inherit-on-fork is in effect",
143 #endif
144 #if defined (PR_RLC)
145 PR_RLC, "PR_RLC", "Run-on-last-close is in effect",
146 #endif
147 #if defined (PR_PTRACE)
148 PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace",
149 #endif
150 #if defined (PR_PCINVAL)
151 PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address",
152 #endif
153 #if defined (PR_ISSYS)
154 PR_ISSYS, "PR_ISSYS", "Is a system process",
155 #endif
156 #if defined (PR_STEP)
157 PR_STEP, "PR_STEP", "Process has single step pending",
158 #endif
159 #if defined (PR_KLC)
160 PR_KLC, "PR_KLC", "Kill-on-last-close is in effect",
161 #endif
162 #if defined (PR_ASYNC)
163 PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect",
164 #endif
165 #if defined (PR_PCOMPAT)
166 PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
167 #endif
168 0, NULL, NULL
169 };
170
171 /* Translate values in the pr_why field of the prstatus struct. */
172
173 static struct trans pr_why_table[] =
174 {
175 #if defined (PR_REQUESTED)
176 PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
177 #endif
178 #if defined (PR_SIGNALLED)
179 PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal",
180 #endif
181 #if defined (PR_FAULTED)
182 PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault",
183 #endif
184 #if defined (PR_SYSENTRY)
185 PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
186 #endif
187 #if defined (PR_SYSEXIT)
188 PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call",
189 #endif
190 #if defined (PR_JOBCONTROL)
191 PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action",
192 #endif
193 #if defined (PR_SUSPENDED)
194 PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
195 #endif
196 0, NULL, NULL
197 };
198
199 /* Hardware fault translation table. */
200
201 static struct trans faults_table[] =
202 {
203 #if defined (FLTILL)
204 FLTILL, "FLTILL", "Illegal instruction",
205 #endif
206 #if defined (FLTPRIV)
207 FLTPRIV, "FLTPRIV", "Privileged instruction",
208 #endif
209 #if defined (FLTBPT)
210 FLTBPT, "FLTBPT", "Breakpoint trap",
211 #endif
212 #if defined (FLTTRACE)
213 FLTTRACE, "FLTTRACE", "Trace trap",
214 #endif
215 #if defined (FLTACCESS)
216 FLTACCESS, "FLTACCESS", "Memory access fault",
217 #endif
218 #if defined (FLTBOUNDS)
219 FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
220 #endif
221 #if defined (FLTIOVF)
222 FLTIOVF, "FLTIOVF", "Integer overflow",
223 #endif
224 #if defined (FLTIZDIV)
225 FLTIZDIV, "FLTIZDIV", "Integer zero divide",
226 #endif
227 #if defined (FLTFPE)
228 FLTFPE, "FLTFPE", "Floating-point exception",
229 #endif
230 #if defined (FLTSTACK)
231 FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
232 #endif
233 #if defined (FLTPAGE)
234 FLTPAGE, "FLTPAGE", "Recoverable page fault",
235 #endif
236 0, NULL, NULL
237 };
238
239 /* Translation table for signal generation information. See UNIX System
240 V Release 4 Programmer's Reference Manual, siginfo(5). */
241
242 static struct sigcode {
243 int signo;
244 int code;
245 char *codename;
246 char *desc;
247 } siginfo_table[] = {
248 #if defined (SIGILL) && defined (ILL_ILLOPC)
249 SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
250 #endif
251 #if defined (SIGILL) && defined (ILL_ILLOPN)
252 SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
253 #endif
254 #if defined (SIGILL) && defined (ILL_ILLADR)
255 SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
256 #endif
257 #if defined (SIGILL) && defined (ILL_ILLTRP)
258 SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
259 #endif
260 #if defined (SIGILL) && defined (ILL_PRVOPC)
261 SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
262 #endif
263 #if defined (SIGILL) && defined (ILL_PRVREG)
264 SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
265 #endif
266 #if defined (SIGILL) && defined (ILL_COPROC)
267 SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
268 #endif
269 #if defined (SIGILL) && defined (ILL_BADSTK)
270 SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
271 #endif
272 #if defined (SIGFPE) && defined (FPE_INTDIV)
273 SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
274 #endif
275 #if defined (SIGFPE) && defined (FPE_INTOVF)
276 SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
277 #endif
278 #if defined (SIGFPE) && defined (FPE_FLTDIV)
279 SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
280 #endif
281 #if defined (SIGFPE) && defined (FPE_FLTOVF)
282 SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow",
283 #endif
284 #if defined (SIGFPE) && defined (FPE_FLTUND)
285 SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
286 #endif
287 #if defined (SIGFPE) && defined (FPE_FLTRES)
288 SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
289 #endif
290 #if defined (SIGFPE) && defined (FPE_FLTINV)
291 SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation",
292 #endif
293 #if defined (SIGFPE) && defined (FPE_FLTSUB)
294 SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range",
295 #endif
296 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
297 SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object",
298 #endif
299 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
300 SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object",
301 #endif
302 #if defined (SIGBUS) && defined (BUS_ADRALN)
303 SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
304 #endif
305 #if defined (SIGBUS) && defined (BUS_ADRERR)
306 SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
307 #endif
308 #if defined (SIGBUS) && defined (BUS_OBJERR)
309 SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error",
310 #endif
311 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
312 SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
313 #endif
314 #if defined (SIGTRAP) && defined (TRAP_TRACE)
315 SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
316 #endif
317 #if defined (SIGCLD) && defined (CLD_EXITED)
318 SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
319 #endif
320 #if defined (SIGCLD) && defined (CLD_KILLED)
321 SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed",
322 #endif
323 #if defined (SIGCLD) && defined (CLD_DUMPED)
324 SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally",
325 #endif
326 #if defined (SIGCLD) && defined (CLD_TRAPPED)
327 SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped",
328 #endif
329 #if defined (SIGCLD) && defined (CLD_STOPPED)
330 SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped",
331 #endif
332 #if defined (SIGCLD) && defined (CLD_CONTINUED)
333 SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued",
334 #endif
335 #if defined (SIGPOLL) && defined (POLL_IN)
336 SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
337 #endif
338 #if defined (SIGPOLL) && defined (POLL_OUT)
339 SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
340 #endif
341 #if defined (SIGPOLL) && defined (POLL_MSG)
342 SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
343 #endif
344 #if defined (SIGPOLL) && defined (POLL_ERR)
345 SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
346 #endif
347 #if defined (SIGPOLL) && defined (POLL_PRI)
348 SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
349 #endif
350 #if defined (SIGPOLL) && defined (POLL_HUP)
351 SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
352 #endif
353 0, 0, NULL, NULL
354 };
355
356 static char *syscall_table[MAX_SYSCALLS];
357
358 /* Prototypes for local functions */
359
360 static void
361 set_proc_siginfo PARAMS ((struct procinfo *, int));
362
363 static void
364 init_syscall_table PARAMS ((void));
365
366 static char *
367 syscallname PARAMS ((int));
368
369 static char *
370 signalname PARAMS ((int));
371
372 static char *
373 errnoname PARAMS ((int));
374
375 static int
376 proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
377
378 static int
379 open_proc_file PARAMS ((int, struct procinfo *, int));
380
381 static void
382 close_proc_file PARAMS ((struct procinfo *));
383
384 static void
385 unconditionally_kill_inferior PARAMS ((struct procinfo *));
386
387 static NORETURN void
388 proc_init_failed PARAMS ((struct procinfo *, char *));
389
390 static void
391 info_proc PARAMS ((char *, int));
392
393 static void
394 info_proc_flags PARAMS ((struct procinfo *, int));
395
396 static void
397 info_proc_stop PARAMS ((struct procinfo *, int));
398
399 static void
400 info_proc_siginfo PARAMS ((struct procinfo *, int));
401
402 static void
403 info_proc_syscalls PARAMS ((struct procinfo *, int));
404
405 static void
406 info_proc_mappings PARAMS ((struct procinfo *, int));
407
408 static void
409 info_proc_signals PARAMS ((struct procinfo *, int));
410
411 static void
412 info_proc_faults PARAMS ((struct procinfo *, int));
413
414 static char *
415 mappingflags PARAMS ((long));
416
417 static char *
418 lookupname PARAMS ((struct trans *, unsigned int, char *));
419
420 static char *
421 lookupdesc PARAMS ((struct trans *, unsigned int));
422
423 static int
424 do_attach PARAMS ((int pid));
425
426 static void
427 do_detach PARAMS ((int siggnal));
428
429 static void
430 procfs_create_inferior PARAMS ((char *, char *, char **));
431
432 static void
433 procfs_notice_signals PARAMS ((int pid));
434
435 static struct procinfo *
436 find_procinfo PARAMS ((pid_t pid, int okfail));
437
438 /* External function prototypes that can't be easily included in any
439 header file because the args are typedefs in system include files. */
440
441 extern void
442 supply_gregset PARAMS ((gregset_t *));
443
444 extern void
445 fill_gregset PARAMS ((gregset_t *, int));
446
447 extern void
448 supply_fpregset PARAMS ((fpregset_t *));
449
450 extern void
451 fill_fpregset PARAMS ((fpregset_t *, int));
452
453 /*
454
455 LOCAL FUNCTION
456
457 find_procinfo -- convert a process id to a struct procinfo
458
459 SYNOPSIS
460
461 static struct procinfo * find_procinfo (pid_t pid, int okfail);
462
463 DESCRIPTION
464
465 Given a process id, look it up in the procinfo chain. Returns
466 a struct procinfo *. If can't find pid, then call error(),
467 unless okfail is set, in which case, return NULL;
468 */
469
470 static struct procinfo *
471 find_procinfo (pid, okfail)
472 pid_t pid;
473 int okfail;
474 {
475 struct procinfo *procinfo;
476
477 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
478 if (procinfo->pid == pid)
479 return procinfo;
480
481 if (okfail)
482 return NULL;
483
484 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
485 }
486
487 /*
488
489 LOCAL MACRO
490
491 current_procinfo -- convert inferior_pid to a struct procinfo
492
493 SYNOPSIS
494
495 static struct procinfo * current_procinfo;
496
497 DESCRIPTION
498
499 Looks up inferior_pid in the procinfo chain. Always returns a
500 struct procinfo *. If process can't be found, we error() out.
501 */
502
503 #define current_procinfo find_procinfo (inferior_pid, 0)
504
505 /*
506
507 LOCAL FUNCTION
508
509 add_fd -- Add the fd to the poll/select list
510
511 SYNOPSIS
512
513 static void add_fd (struct procinfo *);
514
515 DESCRIPTION
516
517 Add the fd of the supplied procinfo to the list of fds used for
518 poll/select operations.
519 */
520
521 static void
522 add_fd (pi)
523 struct procinfo *pi;
524 {
525 if (num_poll_list <= 0)
526 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
527 else
528 poll_list = (struct pollfd *) xrealloc (poll_list,
529 (num_poll_list + 1)
530 * sizeof (struct pollfd));
531 poll_list[num_poll_list].fd = pi->fd;
532 poll_list[num_poll_list].events = POLLPRI;
533
534 num_poll_list++;
535 }
536
537 static void
538 remove_fd (pi)
539 struct procinfo *pi;
540 {
541 int i;
542
543 for (i = 0; i < num_poll_list; i++)
544 {
545 if (poll_list[i].fd == pi->fd)
546 {
547 if (i != num_poll_list - 1)
548 memcpy (poll_list, poll_list + i + 1,
549 (num_poll_list - i - 1) * sizeof (struct pollfd));
550
551 num_poll_list--;
552
553 if (num_poll_list == 0)
554 free (poll_list);
555 else
556 poll_list = (struct pollfd *) xrealloc (poll_list,
557 num_poll_list
558 * sizeof (struct pollfd));
559 return;
560 }
561 }
562 }
563
564 #define LOSING_POLL unixware_sux
565
566 static struct procinfo *
567 wait_fd ()
568 {
569 struct procinfo *pi;
570 int num_fds;
571 int i;
572
573 if (attach_flag)
574 set_sigint_trap (); /* Causes SIGINT to be passed on to the
575 attached process. */
576
577 #ifndef LOSING_POLL
578 num_fds = poll (poll_list, num_poll_list, -1);
579 #else
580 pi = current_procinfo;
581
582 while (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
583 {
584 if (errno != EINTR)
585 {
586 print_sys_errmsg (pi->pathname, errno);
587 error ("PIOCWSTOP failed");
588 }
589 }
590 pi->had_event = 1;
591 #endif
592
593 if (attach_flag)
594 clear_sigint_trap();
595
596 #ifndef LOSING_POLL
597
598 if (num_fds <= 0)
599 {
600 print_sys_errmsg ("poll failed\n", errno);
601 error ("Poll failed, returned %d", num_fds);
602 }
603
604 for (i = 0; i < num_poll_list && num_fds > 0; i++)
605 {
606 if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
607 continue;
608 for (pi = procinfo_list; pi; pi = pi->next)
609 {
610 if (poll_list[i].fd == pi->fd)
611 {
612 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
613 {
614 print_sys_errmsg (pi->pathname, errno);
615 error ("PIOCSTATUS failed");
616 }
617 num_fds--;
618 pi->had_event = 1;
619 break;
620 }
621 }
622 if (!pi)
623 error ("procfs_wait: Couldn't find procinfo for fd %d\n",
624 poll_list[i].fd);
625 }
626 #endif /* LOSING_POLL */
627
628 return pi;
629 }
630
631 /*
632
633 LOCAL FUNCTION
634
635 lookupdesc -- translate a value to a summary desc string
636
637 SYNOPSIS
638
639 static char *lookupdesc (struct trans *transp, unsigned int val);
640
641 DESCRIPTION
642
643 Given a pointer to a translation table and a value to be translated,
644 lookup the desc string and return it.
645 */
646
647 static char *
648 lookupdesc (transp, val)
649 struct trans *transp;
650 unsigned int val;
651 {
652 char *desc;
653
654 for (desc = NULL; transp -> name != NULL; transp++)
655 {
656 if (transp -> value == val)
657 {
658 desc = transp -> desc;
659 break;
660 }
661 }
662
663 /* Didn't find a translation for the specified value, set a default one. */
664
665 if (desc == NULL)
666 {
667 desc = "Unknown";
668 }
669 return (desc);
670 }
671
672 /*
673
674 LOCAL FUNCTION
675
676 lookupname -- translate a value to symbolic name
677
678 SYNOPSIS
679
680 static char *lookupname (struct trans *transp, unsigned int val,
681 char *prefix);
682
683 DESCRIPTION
684
685 Given a pointer to a translation table, a value to be translated,
686 and a default prefix to return if the value can't be translated,
687 match the value with one of the translation table entries and
688 return a pointer to the symbolic name.
689
690 If no match is found it just returns the value as a printable string,
691 with the given prefix. The previous such value, if any, is freed
692 at this time.
693 */
694
695 static char *
696 lookupname (transp, val, prefix)
697 struct trans *transp;
698 unsigned int val;
699 char *prefix;
700 {
701 static char *locbuf;
702 char *name;
703
704 for (name = NULL; transp -> name != NULL; transp++)
705 {
706 if (transp -> value == val)
707 {
708 name = transp -> name;
709 break;
710 }
711 }
712
713 /* Didn't find a translation for the specified value, build a default
714 one using the specified prefix and return it. The lifetime of
715 the value is only until the next one is needed. */
716
717 if (name == NULL)
718 {
719 if (locbuf != NULL)
720 {
721 free (locbuf);
722 }
723 locbuf = xmalloc (strlen (prefix) + 16);
724 sprintf (locbuf, "%s %u", prefix, val);
725 name = locbuf;
726 }
727 return (name);
728 }
729
730 static char *
731 sigcodename (sip)
732 siginfo_t *sip;
733 {
734 struct sigcode *scp;
735 char *name = NULL;
736 static char locbuf[32];
737
738 for (scp = siginfo_table; scp -> codename != NULL; scp++)
739 {
740 if ((scp -> signo == sip -> si_signo) &&
741 (scp -> code == sip -> si_code))
742 {
743 name = scp -> codename;
744 break;
745 }
746 }
747 if (name == NULL)
748 {
749 sprintf (locbuf, "sigcode %u", sip -> si_signo);
750 name = locbuf;
751 }
752 return (name);
753 }
754
755 static char *
756 sigcodedesc (sip)
757 siginfo_t *sip;
758 {
759 struct sigcode *scp;
760 char *desc = NULL;
761
762 for (scp = siginfo_table; scp -> codename != NULL; scp++)
763 {
764 if ((scp -> signo == sip -> si_signo) &&
765 (scp -> code == sip -> si_code))
766 {
767 desc = scp -> desc;
768 break;
769 }
770 }
771 if (desc == NULL)
772 {
773 desc = "Unrecognized signal or trap use";
774 }
775 return (desc);
776 }
777
778 /*
779
780 LOCAL FUNCTION
781
782 syscallname - translate a system call number into a system call name
783
784 SYNOPSIS
785
786 char *syscallname (int syscallnum)
787
788 DESCRIPTION
789
790 Given a system call number, translate it into the printable name
791 of a system call, or into "syscall <num>" if it is an unknown
792 number.
793 */
794
795 static char *
796 syscallname (syscallnum)
797 int syscallnum;
798 {
799 static char locbuf[32];
800 char *rtnval;
801
802 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
803 {
804 rtnval = syscall_table[syscallnum];
805 }
806 else
807 {
808 sprintf (locbuf, "syscall %u", syscallnum);
809 rtnval = locbuf;
810 }
811 return (rtnval);
812 }
813
814 /*
815
816 LOCAL FUNCTION
817
818 init_syscall_table - initialize syscall translation table
819
820 SYNOPSIS
821
822 void init_syscall_table (void)
823
824 DESCRIPTION
825
826 Dynamically initialize the translation table to convert system
827 call numbers into printable system call names. Done once per
828 gdb run, on initialization.
829
830 NOTES
831
832 This is awfully ugly, but preprocessor tricks to make it prettier
833 tend to be nonportable.
834 */
835
836 static void
837 init_syscall_table ()
838 {
839 #if defined (SYS_exit)
840 syscall_table[SYS_exit] = "exit";
841 #endif
842 #if defined (SYS_fork)
843 syscall_table[SYS_fork] = "fork";
844 #endif
845 #if defined (SYS_read)
846 syscall_table[SYS_read] = "read";
847 #endif
848 #if defined (SYS_write)
849 syscall_table[SYS_write] = "write";
850 #endif
851 #if defined (SYS_open)
852 syscall_table[SYS_open] = "open";
853 #endif
854 #if defined (SYS_close)
855 syscall_table[SYS_close] = "close";
856 #endif
857 #if defined (SYS_wait)
858 syscall_table[SYS_wait] = "wait";
859 #endif
860 #if defined (SYS_creat)
861 syscall_table[SYS_creat] = "creat";
862 #endif
863 #if defined (SYS_link)
864 syscall_table[SYS_link] = "link";
865 #endif
866 #if defined (SYS_unlink)
867 syscall_table[SYS_unlink] = "unlink";
868 #endif
869 #if defined (SYS_exec)
870 syscall_table[SYS_exec] = "exec";
871 #endif
872 #if defined (SYS_execv)
873 syscall_table[SYS_execv] = "execv";
874 #endif
875 #if defined (SYS_execve)
876 syscall_table[SYS_execve] = "execve";
877 #endif
878 #if defined (SYS_chdir)
879 syscall_table[SYS_chdir] = "chdir";
880 #endif
881 #if defined (SYS_time)
882 syscall_table[SYS_time] = "time";
883 #endif
884 #if defined (SYS_mknod)
885 syscall_table[SYS_mknod] = "mknod";
886 #endif
887 #if defined (SYS_chmod)
888 syscall_table[SYS_chmod] = "chmod";
889 #endif
890 #if defined (SYS_chown)
891 syscall_table[SYS_chown] = "chown";
892 #endif
893 #if defined (SYS_brk)
894 syscall_table[SYS_brk] = "brk";
895 #endif
896 #if defined (SYS_stat)
897 syscall_table[SYS_stat] = "stat";
898 #endif
899 #if defined (SYS_lseek)
900 syscall_table[SYS_lseek] = "lseek";
901 #endif
902 #if defined (SYS_getpid)
903 syscall_table[SYS_getpid] = "getpid";
904 #endif
905 #if defined (SYS_mount)
906 syscall_table[SYS_mount] = "mount";
907 #endif
908 #if defined (SYS_umount)
909 syscall_table[SYS_umount] = "umount";
910 #endif
911 #if defined (SYS_setuid)
912 syscall_table[SYS_setuid] = "setuid";
913 #endif
914 #if defined (SYS_getuid)
915 syscall_table[SYS_getuid] = "getuid";
916 #endif
917 #if defined (SYS_stime)
918 syscall_table[SYS_stime] = "stime";
919 #endif
920 #if defined (SYS_ptrace)
921 syscall_table[SYS_ptrace] = "ptrace";
922 #endif
923 #if defined (SYS_alarm)
924 syscall_table[SYS_alarm] = "alarm";
925 #endif
926 #if defined (SYS_fstat)
927 syscall_table[SYS_fstat] = "fstat";
928 #endif
929 #if defined (SYS_pause)
930 syscall_table[SYS_pause] = "pause";
931 #endif
932 #if defined (SYS_utime)
933 syscall_table[SYS_utime] = "utime";
934 #endif
935 #if defined (SYS_stty)
936 syscall_table[SYS_stty] = "stty";
937 #endif
938 #if defined (SYS_gtty)
939 syscall_table[SYS_gtty] = "gtty";
940 #endif
941 #if defined (SYS_access)
942 syscall_table[SYS_access] = "access";
943 #endif
944 #if defined (SYS_nice)
945 syscall_table[SYS_nice] = "nice";
946 #endif
947 #if defined (SYS_statfs)
948 syscall_table[SYS_statfs] = "statfs";
949 #endif
950 #if defined (SYS_sync)
951 syscall_table[SYS_sync] = "sync";
952 #endif
953 #if defined (SYS_kill)
954 syscall_table[SYS_kill] = "kill";
955 #endif
956 #if defined (SYS_fstatfs)
957 syscall_table[SYS_fstatfs] = "fstatfs";
958 #endif
959 #if defined (SYS_pgrpsys)
960 syscall_table[SYS_pgrpsys] = "pgrpsys";
961 #endif
962 #if defined (SYS_xenix)
963 syscall_table[SYS_xenix] = "xenix";
964 #endif
965 #if defined (SYS_dup)
966 syscall_table[SYS_dup] = "dup";
967 #endif
968 #if defined (SYS_pipe)
969 syscall_table[SYS_pipe] = "pipe";
970 #endif
971 #if defined (SYS_times)
972 syscall_table[SYS_times] = "times";
973 #endif
974 #if defined (SYS_profil)
975 syscall_table[SYS_profil] = "profil";
976 #endif
977 #if defined (SYS_plock)
978 syscall_table[SYS_plock] = "plock";
979 #endif
980 #if defined (SYS_setgid)
981 syscall_table[SYS_setgid] = "setgid";
982 #endif
983 #if defined (SYS_getgid)
984 syscall_table[SYS_getgid] = "getgid";
985 #endif
986 #if defined (SYS_signal)
987 syscall_table[SYS_signal] = "signal";
988 #endif
989 #if defined (SYS_msgsys)
990 syscall_table[SYS_msgsys] = "msgsys";
991 #endif
992 #if defined (SYS_sys3b)
993 syscall_table[SYS_sys3b] = "sys3b";
994 #endif
995 #if defined (SYS_acct)
996 syscall_table[SYS_acct] = "acct";
997 #endif
998 #if defined (SYS_shmsys)
999 syscall_table[SYS_shmsys] = "shmsys";
1000 #endif
1001 #if defined (SYS_semsys)
1002 syscall_table[SYS_semsys] = "semsys";
1003 #endif
1004 #if defined (SYS_ioctl)
1005 syscall_table[SYS_ioctl] = "ioctl";
1006 #endif
1007 #if defined (SYS_uadmin)
1008 syscall_table[SYS_uadmin] = "uadmin";
1009 #endif
1010 #if defined (SYS_utssys)
1011 syscall_table[SYS_utssys] = "utssys";
1012 #endif
1013 #if defined (SYS_fsync)
1014 syscall_table[SYS_fsync] = "fsync";
1015 #endif
1016 #if defined (SYS_umask)
1017 syscall_table[SYS_umask] = "umask";
1018 #endif
1019 #if defined (SYS_chroot)
1020 syscall_table[SYS_chroot] = "chroot";
1021 #endif
1022 #if defined (SYS_fcntl)
1023 syscall_table[SYS_fcntl] = "fcntl";
1024 #endif
1025 #if defined (SYS_ulimit)
1026 syscall_table[SYS_ulimit] = "ulimit";
1027 #endif
1028 #if defined (SYS_rfsys)
1029 syscall_table[SYS_rfsys] = "rfsys";
1030 #endif
1031 #if defined (SYS_rmdir)
1032 syscall_table[SYS_rmdir] = "rmdir";
1033 #endif
1034 #if defined (SYS_mkdir)
1035 syscall_table[SYS_mkdir] = "mkdir";
1036 #endif
1037 #if defined (SYS_getdents)
1038 syscall_table[SYS_getdents] = "getdents";
1039 #endif
1040 #if defined (SYS_sysfs)
1041 syscall_table[SYS_sysfs] = "sysfs";
1042 #endif
1043 #if defined (SYS_getmsg)
1044 syscall_table[SYS_getmsg] = "getmsg";
1045 #endif
1046 #if defined (SYS_putmsg)
1047 syscall_table[SYS_putmsg] = "putmsg";
1048 #endif
1049 #if defined (SYS_poll)
1050 syscall_table[SYS_poll] = "poll";
1051 #endif
1052 #if defined (SYS_lstat)
1053 syscall_table[SYS_lstat] = "lstat";
1054 #endif
1055 #if defined (SYS_symlink)
1056 syscall_table[SYS_symlink] = "symlink";
1057 #endif
1058 #if defined (SYS_readlink)
1059 syscall_table[SYS_readlink] = "readlink";
1060 #endif
1061 #if defined (SYS_setgroups)
1062 syscall_table[SYS_setgroups] = "setgroups";
1063 #endif
1064 #if defined (SYS_getgroups)
1065 syscall_table[SYS_getgroups] = "getgroups";
1066 #endif
1067 #if defined (SYS_fchmod)
1068 syscall_table[SYS_fchmod] = "fchmod";
1069 #endif
1070 #if defined (SYS_fchown)
1071 syscall_table[SYS_fchown] = "fchown";
1072 #endif
1073 #if defined (SYS_sigprocmask)
1074 syscall_table[SYS_sigprocmask] = "sigprocmask";
1075 #endif
1076 #if defined (SYS_sigsuspend)
1077 syscall_table[SYS_sigsuspend] = "sigsuspend";
1078 #endif
1079 #if defined (SYS_sigaltstack)
1080 syscall_table[SYS_sigaltstack] = "sigaltstack";
1081 #endif
1082 #if defined (SYS_sigaction)
1083 syscall_table[SYS_sigaction] = "sigaction";
1084 #endif
1085 #if defined (SYS_sigpending)
1086 syscall_table[SYS_sigpending] = "sigpending";
1087 #endif
1088 #if defined (SYS_context)
1089 syscall_table[SYS_context] = "context";
1090 #endif
1091 #if defined (SYS_evsys)
1092 syscall_table[SYS_evsys] = "evsys";
1093 #endif
1094 #if defined (SYS_evtrapret)
1095 syscall_table[SYS_evtrapret] = "evtrapret";
1096 #endif
1097 #if defined (SYS_statvfs)
1098 syscall_table[SYS_statvfs] = "statvfs";
1099 #endif
1100 #if defined (SYS_fstatvfs)
1101 syscall_table[SYS_fstatvfs] = "fstatvfs";
1102 #endif
1103 #if defined (SYS_nfssys)
1104 syscall_table[SYS_nfssys] = "nfssys";
1105 #endif
1106 #if defined (SYS_waitsys)
1107 syscall_table[SYS_waitsys] = "waitsys";
1108 #endif
1109 #if defined (SYS_sigsendsys)
1110 syscall_table[SYS_sigsendsys] = "sigsendsys";
1111 #endif
1112 #if defined (SYS_hrtsys)
1113 syscall_table[SYS_hrtsys] = "hrtsys";
1114 #endif
1115 #if defined (SYS_acancel)
1116 syscall_table[SYS_acancel] = "acancel";
1117 #endif
1118 #if defined (SYS_async)
1119 syscall_table[SYS_async] = "async";
1120 #endif
1121 #if defined (SYS_priocntlsys)
1122 syscall_table[SYS_priocntlsys] = "priocntlsys";
1123 #endif
1124 #if defined (SYS_pathconf)
1125 syscall_table[SYS_pathconf] = "pathconf";
1126 #endif
1127 #if defined (SYS_mincore)
1128 syscall_table[SYS_mincore] = "mincore";
1129 #endif
1130 #if defined (SYS_mmap)
1131 syscall_table[SYS_mmap] = "mmap";
1132 #endif
1133 #if defined (SYS_mprotect)
1134 syscall_table[SYS_mprotect] = "mprotect";
1135 #endif
1136 #if defined (SYS_munmap)
1137 syscall_table[SYS_munmap] = "munmap";
1138 #endif
1139 #if defined (SYS_fpathconf)
1140 syscall_table[SYS_fpathconf] = "fpathconf";
1141 #endif
1142 #if defined (SYS_vfork)
1143 syscall_table[SYS_vfork] = "vfork";
1144 #endif
1145 #if defined (SYS_fchdir)
1146 syscall_table[SYS_fchdir] = "fchdir";
1147 #endif
1148 #if defined (SYS_readv)
1149 syscall_table[SYS_readv] = "readv";
1150 #endif
1151 #if defined (SYS_writev)
1152 syscall_table[SYS_writev] = "writev";
1153 #endif
1154 #if defined (SYS_xstat)
1155 syscall_table[SYS_xstat] = "xstat";
1156 #endif
1157 #if defined (SYS_lxstat)
1158 syscall_table[SYS_lxstat] = "lxstat";
1159 #endif
1160 #if defined (SYS_fxstat)
1161 syscall_table[SYS_fxstat] = "fxstat";
1162 #endif
1163 #if defined (SYS_xmknod)
1164 syscall_table[SYS_xmknod] = "xmknod";
1165 #endif
1166 #if defined (SYS_clocal)
1167 syscall_table[SYS_clocal] = "clocal";
1168 #endif
1169 #if defined (SYS_setrlimit)
1170 syscall_table[SYS_setrlimit] = "setrlimit";
1171 #endif
1172 #if defined (SYS_getrlimit)
1173 syscall_table[SYS_getrlimit] = "getrlimit";
1174 #endif
1175 #if defined (SYS_lchown)
1176 syscall_table[SYS_lchown] = "lchown";
1177 #endif
1178 #if defined (SYS_memcntl)
1179 syscall_table[SYS_memcntl] = "memcntl";
1180 #endif
1181 #if defined (SYS_getpmsg)
1182 syscall_table[SYS_getpmsg] = "getpmsg";
1183 #endif
1184 #if defined (SYS_putpmsg)
1185 syscall_table[SYS_putpmsg] = "putpmsg";
1186 #endif
1187 #if defined (SYS_rename)
1188 syscall_table[SYS_rename] = "rename";
1189 #endif
1190 #if defined (SYS_uname)
1191 syscall_table[SYS_uname] = "uname";
1192 #endif
1193 #if defined (SYS_setegid)
1194 syscall_table[SYS_setegid] = "setegid";
1195 #endif
1196 #if defined (SYS_sysconfig)
1197 syscall_table[SYS_sysconfig] = "sysconfig";
1198 #endif
1199 #if defined (SYS_adjtime)
1200 syscall_table[SYS_adjtime] = "adjtime";
1201 #endif
1202 #if defined (SYS_systeminfo)
1203 syscall_table[SYS_systeminfo] = "systeminfo";
1204 #endif
1205 #if defined (SYS_seteuid)
1206 syscall_table[SYS_seteuid] = "seteuid";
1207 #endif
1208 #if defined (SYS_sproc)
1209 syscall_table[SYS_sproc] = "sproc";
1210 #endif
1211 }
1212
1213 /*
1214
1215 LOCAL FUNCTION
1216
1217 procfs_kill_inferior - kill any currently inferior
1218
1219 SYNOPSIS
1220
1221 void procfs_kill_inferior (void)
1222
1223 DESCRIPTION
1224
1225 Kill any current inferior.
1226
1227 NOTES
1228
1229 Kills even attached inferiors. Presumably the user has already
1230 been prompted that the inferior is an attached one rather than
1231 one started by gdb. (FIXME?)
1232
1233 */
1234
1235 static void
1236 procfs_kill_inferior ()
1237 {
1238 target_mourn_inferior ();
1239 }
1240
1241 /*
1242
1243 LOCAL FUNCTION
1244
1245 unconditionally_kill_inferior - terminate the inferior
1246
1247 SYNOPSIS
1248
1249 static void unconditionally_kill_inferior (struct procinfo *)
1250
1251 DESCRIPTION
1252
1253 Kill the specified inferior.
1254
1255 NOTE
1256
1257 A possibly useful enhancement would be to first try sending
1258 the inferior a terminate signal, politely asking it to commit
1259 suicide, before we murder it (we could call that
1260 politely_kill_inferior()).
1261
1262 */
1263
1264 static void
1265 unconditionally_kill_inferior (pi)
1266 struct procinfo *pi;
1267 {
1268 int signo;
1269 int ppid;
1270
1271 ppid = pi->prstatus.pr_ppid;
1272
1273 signo = SIGKILL;
1274 ioctl (pi->fd, PIOCKILL, &signo);
1275 close_proc_file (pi);
1276
1277 /* Only wait() for our direct children. Our grandchildren zombies are killed
1278 by the death of their parents. */
1279
1280 if (ppid == getpid())
1281 wait ((int *) 0);
1282 }
1283
1284 /*
1285
1286 LOCAL FUNCTION
1287
1288 procfs_xfer_memory -- copy data to or from inferior memory space
1289
1290 SYNOPSIS
1291
1292 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1293 int dowrite, struct target_ops target)
1294
1295 DESCRIPTION
1296
1297 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1298 from/to debugger memory starting at MYADDR. Copy from inferior
1299 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1300
1301 Returns the length copied, which is either the LEN argument or
1302 zero. This xfer function does not do partial moves, since procfs_ops
1303 doesn't allow memory operations to cross below us in the target stack
1304 anyway.
1305
1306 NOTES
1307
1308 The /proc interface makes this an almost trivial task.
1309 */
1310
1311 static int
1312 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1313 CORE_ADDR memaddr;
1314 char *myaddr;
1315 int len;
1316 int dowrite;
1317 struct target_ops *target; /* ignored */
1318 {
1319 int nbytes = 0;
1320 struct procinfo *pi;
1321
1322 pi = current_procinfo;
1323
1324 if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
1325 {
1326 if (dowrite)
1327 {
1328 nbytes = write (pi->fd, myaddr, len);
1329 }
1330 else
1331 {
1332 nbytes = read (pi->fd, myaddr, len);
1333 }
1334 if (nbytes < 0)
1335 {
1336 nbytes = 0;
1337 }
1338 }
1339 return (nbytes);
1340 }
1341
1342 /*
1343
1344 LOCAL FUNCTION
1345
1346 procfs_store_registers -- copy register values back to inferior
1347
1348 SYNOPSIS
1349
1350 void procfs_store_registers (int regno)
1351
1352 DESCRIPTION
1353
1354 Store our current register values back into the inferior. If
1355 REGNO is -1 then store all the register, otherwise store just
1356 the value specified by REGNO.
1357
1358 NOTES
1359
1360 If we are storing only a single register, we first have to get all
1361 the current values from the process, overwrite the desired register
1362 in the gregset with the one we want from gdb's registers, and then
1363 send the whole set back to the process. For writing all the
1364 registers, all we have to do is generate the gregset and send it to
1365 the process.
1366
1367 Also note that the process has to be stopped on an event of interest
1368 for this to work, which basically means that it has to have been
1369 run under the control of one of the other /proc ioctl calls and not
1370 ptrace. Since we don't use ptrace anyway, we don't worry about this
1371 fine point, but it is worth noting for future reference.
1372
1373 Gdb is confused about what this function is supposed to return.
1374 Some versions return a value, others return nothing. Some are
1375 declared to return a value and actually return nothing. Gdb ignores
1376 anything returned. (FIXME)
1377
1378 */
1379
1380 static void
1381 procfs_store_registers (regno)
1382 int regno;
1383 {
1384 struct procinfo *pi;
1385
1386 pi = current_procinfo;
1387
1388 if (regno != -1)
1389 {
1390 ioctl (pi->fd, PIOCGREG, &pi->gregset);
1391 }
1392 fill_gregset (&pi->gregset, regno);
1393 ioctl (pi->fd, PIOCSREG, &pi->gregset);
1394
1395 #if defined (FP0_REGNUM)
1396
1397 /* Now repeat everything using the floating point register set, if the
1398 target has floating point hardware. Since we ignore the returned value,
1399 we'll never know whether it worked or not anyway. */
1400
1401 if (regno != -1)
1402 {
1403 ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
1404 }
1405 fill_fpregset (&pi->fpregset, regno);
1406 ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
1407
1408 #endif /* FP0_REGNUM */
1409
1410 }
1411
1412 /*
1413
1414 LOCAL FUNCTION
1415
1416 create_procinfo - initialize access to a /proc entry
1417
1418 SYNOPSIS
1419
1420 void create_procinfo (int pid)
1421
1422 DESCRIPTION
1423
1424 Allocate a procinfo structure, open the /proc file and then sets up
1425 the set of signals and faults that are to be traced.
1426
1427 NOTES
1428
1429 If proc_init_failed ever gets called, control returns to the command
1430 processing loop via the standard error handling code.
1431
1432 */
1433
1434 static void
1435 create_procinfo (pid)
1436 int pid;
1437 {
1438 struct procinfo *pi;
1439
1440 if (find_procinfo (pid, 1))
1441 return; /* All done! It already exists */
1442
1443 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1444
1445 if (!open_proc_file (pid, pi, O_RDWR))
1446 proc_init_failed (pi, "can't open process file");
1447
1448 /* Add new process to process info list */
1449
1450 pi->next = procinfo_list;
1451 procinfo_list = pi;
1452
1453 add_fd (pi); /* Add to list for poll/select */
1454
1455 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
1456 prfillset (&pi->prrun.pr_trace);
1457 procfs_notice_signals (pid);
1458 prfillset (&pi->prrun.pr_fault);
1459 prdelset (&pi->prrun.pr_fault, FLTPAGE);
1460
1461 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
1462 proc_init_failed (pi, "PIOCWSTOP failed");
1463
1464 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
1465 proc_init_failed (pi, "PIOCSFAULT failed");
1466 }
1467
1468 /*
1469
1470 LOCAL FUNCTION
1471
1472 procfs_init_inferior - initialize target vector and access to a
1473 /proc entry
1474
1475 SYNOPSIS
1476
1477 void procfs_init_inferior (int pid)
1478
1479 DESCRIPTION
1480
1481 When gdb starts an inferior, this function is called in the parent
1482 process immediately after the fork. It waits for the child to stop
1483 on the return from the exec system call (the child itself takes care
1484 of ensuring that this is set up), then sets up the set of signals
1485 and faults that are to be traced.
1486
1487 NOTES
1488
1489 If proc_init_failed ever gets called, control returns to the command
1490 processing loop via the standard error handling code.
1491
1492 */
1493
1494 static void
1495 procfs_init_inferior (pid)
1496 int pid;
1497 {
1498 push_target (&procfs_ops);
1499
1500 create_procinfo (pid);
1501 add_thread (pid); /* Setup initial thread */
1502
1503 /* One trap to exec the shell, one to exec the program being debugged. */
1504 startup_inferior (2);
1505 }
1506
1507 /*
1508
1509 GLOBAL FUNCTION
1510
1511 procfs_notice_signals
1512
1513 SYNOPSIS
1514
1515 static void procfs_notice_signals (int pid);
1516
1517 DESCRIPTION
1518
1519 When the user changes the state of gdb's signal handling via the
1520 "handle" command, this function gets called to see if any change
1521 in the /proc interface is required. It is also called internally
1522 by other /proc interface functions to initialize the state of
1523 the traced signal set.
1524
1525 One thing it does is that signals for which the state is "nostop",
1526 "noprint", and "pass", have their trace bits reset in the pr_trace
1527 field, so that they are no longer traced. This allows them to be
1528 delivered directly to the inferior without the debugger ever being
1529 involved.
1530 */
1531
1532 static void
1533 procfs_notice_signals (pid)
1534 int pid;
1535 {
1536 int signo;
1537 struct procinfo *pi;
1538
1539 pi = find_procinfo (pid, 0);
1540
1541 for (signo = 0; signo < NSIG; signo++)
1542 {
1543 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
1544 signal_print_state (target_signal_from_host (signo)) == 0 &&
1545 signal_pass_state (target_signal_from_host (signo)) == 1)
1546 {
1547 prdelset (&pi->prrun.pr_trace, signo);
1548 }
1549 else
1550 {
1551 praddset (&pi->prrun.pr_trace, signo);
1552 }
1553 }
1554 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
1555 {
1556 print_sys_errmsg ("PIOCSTRACE failed", errno);
1557 }
1558 }
1559
1560 /*
1561
1562 LOCAL FUNCTION
1563
1564 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1565
1566 SYNOPSIS
1567
1568 void proc_set_exec_trap (void)
1569
1570 DESCRIPTION
1571
1572 This function is called in the child process when starting up
1573 an inferior, prior to doing the exec of the actual inferior.
1574 It sets the child process's exitset to make exit from the exec
1575 system call an event of interest to stop on, and then simply
1576 returns. The child does the exec, the system call returns, and
1577 the child stops at the first instruction, ready for the gdb
1578 parent process to take control of it.
1579
1580 NOTE
1581
1582 We need to use all local variables since the child may be sharing
1583 it's data space with the parent, if vfork was used rather than
1584 fork.
1585
1586 Also note that we want to turn off the inherit-on-fork flag in
1587 the child process so that any grand-children start with all
1588 tracing flags cleared.
1589 */
1590
1591 static void
1592 proc_set_exec_trap ()
1593 {
1594 sysset_t exitset;
1595 sysset_t entryset;
1596 auto char procname[32];
1597 int fd;
1598
1599 sprintf (procname, PROC_NAME_FMT, getpid ());
1600 if ((fd = open (procname, O_RDWR)) < 0)
1601 {
1602 perror (procname);
1603 gdb_flush (gdb_stderr);
1604 _exit (127);
1605 }
1606 premptyset (&exitset);
1607 premptyset (&entryset);
1608
1609 /* GW: Rationale...
1610 Not all systems with /proc have all the exec* syscalls with the same
1611 names. On the SGI, for example, there is no SYS_exec, but there
1612 *is* a SYS_execv. So, we try to account for that. */
1613
1614 #ifdef SYS_exec
1615 praddset (&exitset, SYS_exec);
1616 #endif
1617 #ifdef SYS_execve
1618 praddset (&exitset, SYS_execve);
1619 #endif
1620 #ifdef SYS_execv
1621 praddset (&exitset, SYS_execv);
1622 #endif
1623
1624 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1625 {
1626 perror (procname);
1627 gdb_flush (gdb_stderr);
1628 _exit (127);
1629 }
1630
1631 praddset (&entryset, SYS_exit);
1632
1633 if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
1634 {
1635 perror (procname);
1636 gdb_flush (gdb_stderr);
1637 _exit (126);
1638 }
1639
1640 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1641 start with tracing flags cleared. */
1642
1643 #if defined (PIOCRESET) /* New method */
1644 {
1645 long pr_flags;
1646 pr_flags = PR_FORK;
1647 ioctl (fd, PIOCRESET, &pr_flags);
1648 }
1649 #else
1650 #if defined (PIOCRFORK) /* Original method */
1651 ioctl (fd, PIOCRFORK, NULL);
1652 #endif
1653 #endif
1654
1655 /* Turn on run-on-last-close flag so that this process will not hang
1656 if GDB goes away for some reason. */
1657
1658 #if defined (PIOCSET) /* New method */
1659 {
1660 long pr_flags;
1661 pr_flags = PR_RLC;
1662 (void) ioctl (fd, PIOCSET, &pr_flags);
1663 }
1664 #else
1665 #if defined (PIOCSRLC) /* Original method */
1666 (void) ioctl (fd, PIOCSRLC, 0);
1667 #endif
1668 #endif
1669 }
1670
1671 /*
1672
1673 GLOBAL FUNCTION
1674
1675 proc_iterate_over_mappings -- call function for every mapped space
1676
1677 SYNOPSIS
1678
1679 int proc_iterate_over_mappings (int (*func)())
1680
1681 DESCRIPTION
1682
1683 Given a pointer to a function, call that function for every
1684 mapped address space, passing it an open file descriptor for
1685 the file corresponding to that mapped address space (if any)
1686 and the base address of the mapped space. Quit when we hit
1687 the end of the mappings or the function returns nonzero.
1688 */
1689
1690 int
1691 proc_iterate_over_mappings (func)
1692 int (*func) PARAMS ((int, CORE_ADDR));
1693 {
1694 int nmap;
1695 int fd;
1696 int funcstat = 0;
1697 struct prmap *prmaps;
1698 struct prmap *prmap;
1699 struct procinfo *pi;
1700
1701 pi = current_procinfo;
1702
1703 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1704 {
1705 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1706 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1707 {
1708 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1709 {
1710 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
1711 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1712 close (fd);
1713 }
1714 }
1715 }
1716 return (funcstat);
1717 }
1718
1719 #if 0 /* Currently unused */
1720 /*
1721
1722 GLOBAL FUNCTION
1723
1724 proc_base_address -- find base address for segment containing address
1725
1726 SYNOPSIS
1727
1728 CORE_ADDR proc_base_address (CORE_ADDR addr)
1729
1730 DESCRIPTION
1731
1732 Given an address of a location in the inferior, find and return
1733 the base address of the mapped segment containing that address.
1734
1735 This is used for example, by the shared library support code,
1736 where we have the pc value for some location in the shared library
1737 where we are stopped, and need to know the base address of the
1738 segment containing that address.
1739 */
1740
1741 CORE_ADDR
1742 proc_base_address (addr)
1743 CORE_ADDR addr;
1744 {
1745 int nmap;
1746 struct prmap *prmaps;
1747 struct prmap *prmap;
1748 CORE_ADDR baseaddr = 0;
1749 struct procinfo *pi;
1750
1751 pi = current_procinfo;
1752
1753 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1754 {
1755 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1756 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1757 {
1758 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1759 {
1760 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1761 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1762 {
1763 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1764 break;
1765 }
1766 }
1767 }
1768 }
1769 return (baseaddr);
1770 }
1771
1772 #endif /* 0 */
1773
1774 /*
1775
1776 LOCAL FUNCTION
1777
1778 proc_address_to_fd -- return open fd for file mapped to address
1779
1780 SYNOPSIS
1781
1782 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1783
1784 DESCRIPTION
1785
1786 Given an address in the current inferior's address space, use the
1787 /proc interface to find an open file descriptor for the file that
1788 this address was mapped in from. Return -1 if there is no current
1789 inferior. Print a warning message if there is an inferior but
1790 the address corresponds to no file (IE a bogus address).
1791
1792 */
1793
1794 static int
1795 proc_address_to_fd (pi, addr, complain)
1796 struct procinfo *pi;
1797 CORE_ADDR addr;
1798 int complain;
1799 {
1800 int fd = -1;
1801
1802 if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1803 {
1804 if (complain)
1805 {
1806 print_sys_errmsg (pi->pathname, errno);
1807 warning ("can't find mapped file for address 0x%x", addr);
1808 }
1809 }
1810 return (fd);
1811 }
1812
1813
1814 /* Attach to process PID, then initialize for debugging it
1815 and wait for the trace-trap that results from attaching. */
1816
1817 static void
1818 procfs_attach (args, from_tty)
1819 char *args;
1820 int from_tty;
1821 {
1822 char *exec_file;
1823 int pid;
1824
1825 if (!args)
1826 error_no_arg ("process-id to attach");
1827
1828 pid = atoi (args);
1829
1830 if (pid == getpid()) /* Trying to masturbate? */
1831 error ("I refuse to debug myself!");
1832
1833 if (from_tty)
1834 {
1835 exec_file = (char *) get_exec_file (0);
1836
1837 if (exec_file)
1838 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
1839 else
1840 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
1841
1842 gdb_flush (gdb_stdout);
1843 }
1844
1845 do_attach (pid);
1846 inferior_pid = pid;
1847 push_target (&procfs_ops);
1848 }
1849
1850
1851 /* Take a program previously attached to and detaches it.
1852 The program resumes execution and will no longer stop
1853 on signals, etc. We'd better not have left any breakpoints
1854 in the program or it'll die when it hits one. For this
1855 to work, it may be necessary for the process to have been
1856 previously attached. It *might* work if the program was
1857 started via the normal ptrace (PTRACE_TRACEME). */
1858
1859 static void
1860 procfs_detach (args, from_tty)
1861 char *args;
1862 int from_tty;
1863 {
1864 int siggnal = 0;
1865
1866 if (from_tty)
1867 {
1868 char *exec_file = get_exec_file (0);
1869 if (exec_file == 0)
1870 exec_file = "";
1871 printf_unfiltered ("Detaching from program: %s %s\n",
1872 exec_file, target_pid_to_str (inferior_pid));
1873 gdb_flush (gdb_stdout);
1874 }
1875 if (args)
1876 siggnal = atoi (args);
1877
1878 do_detach (siggnal);
1879 inferior_pid = 0;
1880 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
1881 }
1882
1883 /* Get ready to modify the registers array. On machines which store
1884 individual registers, this doesn't need to do anything. On machines
1885 which store all the registers in one fell swoop, this makes sure
1886 that registers contains all the registers from the program being
1887 debugged. */
1888
1889 static void
1890 procfs_prepare_to_store ()
1891 {
1892 #ifdef CHILD_PREPARE_TO_STORE
1893 CHILD_PREPARE_TO_STORE ();
1894 #endif
1895 }
1896
1897 /* Print status information about what we're accessing. */
1898
1899 static void
1900 procfs_files_info (ignore)
1901 struct target_ops *ignore;
1902 {
1903 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
1904 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
1905 }
1906
1907 /* ARGSUSED */
1908 static void
1909 procfs_open (arg, from_tty)
1910 char *arg;
1911 int from_tty;
1912 {
1913 error ("Use the \"run\" command to start a Unix child process.");
1914 }
1915
1916 /*
1917
1918 LOCAL FUNCTION
1919
1920 do_attach -- attach to an already existing process
1921
1922 SYNOPSIS
1923
1924 int do_attach (int pid)
1925
1926 DESCRIPTION
1927
1928 Attach to an already existing process with the specified process
1929 id. If the process is not already stopped, query whether to
1930 stop it or not.
1931
1932 NOTES
1933
1934 The option of stopping at attach time is specific to the /proc
1935 versions of gdb. Versions using ptrace force the attachee
1936 to stop. (I have changed this version to do so, too. All you
1937 have to do is "continue" to make it go on. -- gnu@cygnus.com)
1938
1939 */
1940
1941 static int
1942 do_attach (pid)
1943 int pid;
1944 {
1945 int result;
1946 struct procinfo *pi;
1947
1948 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1949
1950 if (!open_proc_file (pid, pi, O_RDWR))
1951 {
1952 free (pi);
1953 perror_with_name (pi->pathname);
1954 /* NOTREACHED */
1955 }
1956
1957 /* Add new process to process info list */
1958
1959 pi->next = procinfo_list;
1960 procinfo_list = pi;
1961
1962 add_fd (pi); /* Add to list for poll/select */
1963
1964 /* Get current status of process and if it is not already stopped,
1965 then stop it. Remember whether or not it was stopped when we first
1966 examined it. */
1967
1968 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
1969 {
1970 print_sys_errmsg (pi->pathname, errno);
1971 close_proc_file (pi);
1972 error ("PIOCSTATUS failed");
1973 }
1974 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1975 {
1976 pi->was_stopped = 1;
1977 }
1978 else
1979 {
1980 pi->was_stopped = 0;
1981 if (1 || query ("Process is currently running, stop it? "))
1982 {
1983 /* Make it run again when we close it. */
1984 #if defined (PIOCSET) /* New method */
1985 {
1986 long pr_flags;
1987 pr_flags = PR_RLC;
1988 result = ioctl (pi->fd, PIOCSET, &pr_flags);
1989 }
1990 #else
1991 #if defined (PIOCSRLC) /* Original method */
1992 result = ioctl (pi->fd, PIOCSRLC, 0);
1993 #endif
1994 #endif
1995 if (result < 0)
1996 {
1997 print_sys_errmsg (pi->pathname, errno);
1998 close_proc_file (pi);
1999 error ("PIOCSRLC or PIOCSET failed");
2000 }
2001 if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
2002 {
2003 print_sys_errmsg (pi->pathname, errno);
2004 close_proc_file (pi);
2005 error ("PIOCSTOP failed");
2006 }
2007 pi->nopass_next_sigstop = 1;
2008 }
2009 else
2010 {
2011 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
2012 }
2013 }
2014
2015 /* Remember some things about the inferior that we will, or might, change
2016 so that we can restore them when we detach. */
2017
2018 ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
2019 ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
2020 ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
2021 ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
2022 ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
2023
2024 /* Set up trace and fault sets, as gdb expects them. */
2025
2026 memset (&pi->prrun, 0, sizeof (pi->prrun));
2027 prfillset (&pi->prrun.pr_trace);
2028 procfs_notice_signals (pid);
2029 prfillset (&pi->prrun.pr_fault);
2030 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2031 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
2032 {
2033 print_sys_errmsg ("PIOCSFAULT failed", errno);
2034 }
2035 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
2036 {
2037 print_sys_errmsg ("PIOCSTRACE failed", errno);
2038 }
2039 attach_flag = 1;
2040 return (pid);
2041 }
2042
2043 /*
2044
2045 LOCAL FUNCTION
2046
2047 do_detach -- detach from an attached-to process
2048
2049 SYNOPSIS
2050
2051 void do_detach (int signal)
2052
2053 DESCRIPTION
2054
2055 Detach from the current attachee.
2056
2057 If signal is non-zero, the attachee is started running again and sent
2058 the specified signal.
2059
2060 If signal is zero and the attachee was not already stopped when we
2061 attached to it, then we make it runnable again when we detach.
2062
2063 Otherwise, we query whether or not to make the attachee runnable
2064 again, since we may simply want to leave it in the state it was in
2065 when we attached.
2066
2067 We report any problems, but do not consider them errors, since we
2068 MUST detach even if some things don't seem to go right. This may not
2069 be the ideal situation. (FIXME).
2070 */
2071
2072 static void
2073 do_detach (signal)
2074 int signal;
2075 {
2076 int result;
2077 struct procinfo *pi;
2078
2079 pi = current_procinfo;
2080
2081 if (signal)
2082 {
2083 set_proc_siginfo (pi, signal);
2084 }
2085 if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
2086 {
2087 print_sys_errmsg (pi->pathname, errno);
2088 printf_unfiltered ("PIOCSEXIT failed.\n");
2089 }
2090 if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
2091 {
2092 print_sys_errmsg (pi->pathname, errno);
2093 printf_unfiltered ("PIOCSENTRY failed.\n");
2094 }
2095 if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
2096 {
2097 print_sys_errmsg (pi->pathname, errno);
2098 printf_unfiltered ("PIOCSTRACE failed.\n");
2099 }
2100 if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
2101 {
2102 print_sys_errmsg (pi->pathname, errno);
2103 printf_unfiltered ("PIOSCHOLD failed.\n");
2104 }
2105 if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
2106 {
2107 print_sys_errmsg (pi->pathname, errno);
2108 printf_unfiltered ("PIOCSFAULT failed.\n");
2109 }
2110 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2111 {
2112 print_sys_errmsg (pi->pathname, errno);
2113 printf_unfiltered ("PIOCSTATUS failed.\n");
2114 }
2115 else
2116 {
2117 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2118 {
2119 if (signal || !pi->was_stopped ||
2120 query ("Was stopped when attached, make it runnable again? "))
2121 {
2122 /* Clear any fault that might have stopped it. */
2123 if (ioctl (pi->fd, PIOCCFAULT, 0))
2124 {
2125 print_sys_errmsg (pi->pathname, errno);
2126 printf_unfiltered ("PIOCCFAULT failed.\n");
2127 }
2128
2129 /* Make it run again when we close it. */
2130 #if defined (PIOCSET) /* New method */
2131 {
2132 long pr_flags;
2133 pr_flags = PR_RLC;
2134 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2135 }
2136 #else
2137 #if defined (PIOCSRLC) /* Original method */
2138 result = ioctl (pi->fd, PIOCSRLC, 0);
2139 #endif
2140 #endif
2141 if (result)
2142 {
2143 print_sys_errmsg (pi->pathname, errno);
2144 printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
2145 }
2146 }
2147 }
2148 }
2149 close_proc_file (pi);
2150 attach_flag = 0;
2151 }
2152
2153 /* emulate wait() as much as possible.
2154 Wait for child to do something. Return pid of child, or -1 in case
2155 of error; store status in *OURSTATUS.
2156
2157 Not sure why we can't
2158 just use wait(), but it seems to have problems when applied to a
2159 process being controlled with the /proc interface.
2160
2161 We have a race problem here with no obvious solution. We need to let
2162 the inferior run until it stops on an event of interest, which means
2163 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2164 ioctl if the process is already stopped on something that is not an
2165 event of interest, or the call will hang indefinitely. Thus we first
2166 use PIOCSTATUS to see if the process is not stopped. If not, then we
2167 use PIOCWSTOP. But during the window between the two, if the process
2168 stops for any reason that is not an event of interest (such as a job
2169 control signal) then gdb will hang. One possible workaround is to set
2170 an alarm to wake up every minute of so and check to see if the process
2171 is still running, and if so, then reissue the PIOCWSTOP. But this is
2172 a real kludge, so has not been implemented. FIXME: investigate
2173 alternatives.
2174
2175 FIXME: Investigate why wait() seems to have problems with programs
2176 being control by /proc routines. */
2177
2178 static int
2179 procfs_wait (pid, ourstatus)
2180 int pid;
2181 struct target_waitstatus *ourstatus;
2182 {
2183 short what;
2184 short why;
2185 int statval = 0;
2186 int checkerr = 0;
2187 int rtnval = -1;
2188 struct procinfo *pi;
2189
2190 if (pid != -1) /* Non-specific process? */
2191 pi = NULL;
2192 else
2193 for (pi = procinfo_list; pi; pi = pi->next)
2194 if (pi->had_event)
2195 break;
2196
2197 wait_again:
2198
2199 if (!pi)
2200 pi = wait_fd ();
2201
2202 if (pid != -1)
2203 for (pi = procinfo_list; pi; pi = pi->next)
2204 if (pi->pid == pid && pi->had_event)
2205 break;
2206
2207 if (!pi && !checkerr)
2208 goto wait_again;
2209
2210 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2211 {
2212 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
2213 {
2214 checkerr++;
2215 }
2216 }
2217 if (checkerr)
2218 {
2219 if (errno == ENOENT)
2220 {
2221 rtnval = wait (&statval);
2222 if (rtnval != inferior_pid)
2223 {
2224 print_sys_errmsg (pi->pathname, errno);
2225 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
2226 /* NOTREACHED */
2227 }
2228 }
2229 else
2230 {
2231 print_sys_errmsg (pi->pathname, errno);
2232 error ("PIOCSTATUS or PIOCWSTOP failed.");
2233 /* NOTREACHED */
2234 }
2235 }
2236 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2237 {
2238 rtnval = pi->prstatus.pr_pid;
2239 why = pi->prstatus.pr_why;
2240 what = pi->prstatus.pr_what;
2241
2242 switch (why)
2243 {
2244 case PR_SIGNALLED:
2245 statval = (what << 8) | 0177;
2246 break;
2247 case PR_SYSENTRY:
2248 if (what != SYS_exit)
2249 error ("PR_SYSENTRY, unknown system call %d", what);
2250
2251 pi->prrun.pr_flags = PRCFAULT;
2252
2253 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2254 perror_with_name (pi->pathname);
2255
2256 rtnval = wait (&statval);
2257
2258 break;
2259 case PR_SYSEXIT:
2260 switch (what)
2261 {
2262 #ifdef SYS_exec
2263 case SYS_exec:
2264 #endif
2265 #ifdef SYS_execve
2266 case SYS_execve:
2267 #endif
2268 #ifdef SYS_execv
2269 case SYS_execv:
2270 #endif
2271 statval = (SIGTRAP << 8) | 0177;
2272 break;
2273 #ifdef SYS_sproc
2274 case SYS_sproc:
2275 /* We've just detected the completion of an sproc system call. Now we need to
2276 setup a procinfo struct for this thread, and notify the thread system of the
2277 new arrival. */
2278
2279 /* If sproc failed, then nothing interesting happened. Continue the process and
2280 go back to sleep. */
2281
2282 if (pi->prstatus.pr_errno != 0)
2283 {
2284 pi->prrun.pr_flags &= PRSTEP;
2285 pi->prrun.pr_flags |= PRCFAULT;
2286
2287 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2288 perror_with_name (pi->pathname);
2289
2290 goto wait_again;
2291 }
2292
2293 /* At this point, the new thread is stopped at it's first instruction, and
2294 the parent is stopped at the exit from sproc. */
2295
2296 /* Notify the caller of the arrival of a new thread. */
2297 create_procinfo (pi->prstatus.pr_rval1);
2298
2299 rtnval = pi->prstatus.pr_rval1;
2300 statval = (SIGTRAP << 8) | 0177;
2301
2302 break;
2303 #endif /* SYS_sproc */
2304
2305 default:
2306 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
2307 }
2308 break;
2309 case PR_REQUESTED:
2310 statval = (SIGSTOP << 8) | 0177;
2311 break;
2312 case PR_JOBCONTROL:
2313 statval = (what << 8) | 0177;
2314 break;
2315 case PR_FAULTED:
2316 switch (what)
2317 {
2318 case FLTPRIV:
2319 case FLTILL:
2320 statval = (SIGILL << 8) | 0177;
2321 break;
2322 case FLTBPT:
2323 case FLTTRACE:
2324 statval = (SIGTRAP << 8) | 0177;
2325 break;
2326 case FLTWATCH:
2327 case FLTKWATCH:
2328 statval = (SIGTRAP << 8) | 0177;
2329 break;
2330 case FLTSTACK:
2331 case FLTACCESS:
2332 case FLTBOUNDS:
2333 statval = (SIGSEGV << 8) | 0177;
2334 break;
2335 case FLTIOVF:
2336 case FLTIZDIV:
2337 case FLTFPE:
2338 statval = (SIGFPE << 8) | 0177;
2339 break;
2340 case FLTPAGE: /* Recoverable page fault */
2341 default:
2342 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2343 }
2344 break;
2345 default:
2346 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2347 }
2348 /* Stop all the other threads when any of them stops. */
2349
2350 {
2351 struct procinfo *procinfo;
2352
2353 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2354 {
2355 if (!procinfo->had_event)
2356 if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
2357 {
2358 print_sys_errmsg (procinfo->pathname, errno);
2359 error ("PIOCSTOP failed");
2360 }
2361 }
2362 }
2363 }
2364 else
2365 {
2366 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2367 pi->prstatus.pr_flags);
2368 }
2369
2370 store_waitstatus (ourstatus, statval);
2371
2372 if (rtnval == -1) /* No more children to wait for */
2373 {
2374 fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
2375 /* Claim it exited with unknown signal. */
2376 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2377 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
2378 return rtnval;
2379 }
2380
2381 pi->had_event = 0; /* Indicate that we've seen this one */
2382 return (rtnval);
2383 }
2384
2385 /*
2386
2387 LOCAL FUNCTION
2388
2389 set_proc_siginfo - set a process's current signal info
2390
2391 SYNOPSIS
2392
2393 void set_proc_siginfo (struct procinfo *pip, int signo);
2394
2395 DESCRIPTION
2396
2397 Given a pointer to a process info struct in PIP and a signal number
2398 in SIGNO, set the process's current signal and its associated signal
2399 information. The signal will be delivered to the process immediately
2400 after execution is resumed, even if it is being held. In addition,
2401 this particular delivery will not cause another PR_SIGNALLED stop
2402 even if the signal is being traced.
2403
2404 If we are not delivering the same signal that the prstatus siginfo
2405 struct contains information about, then synthesize a siginfo struct
2406 to match the signal we are doing to deliver, make it of the type
2407 "generated by a user process", and send this synthesized copy. When
2408 used to set the inferior's signal state, this will be required if we
2409 are not currently stopped because of a traced signal, or if we decide
2410 to continue with a different signal.
2411
2412 Note that when continuing the inferior from a stop due to receipt
2413 of a traced signal, we either have set PRCSIG to clear the existing
2414 signal, or we have to call this function to do a PIOCSSIG with either
2415 the existing siginfo struct from pr_info, or one we have synthesized
2416 appropriately for the signal we want to deliver. Otherwise if the
2417 signal is still being traced, the inferior will immediately stop
2418 again.
2419
2420 See siginfo(5) for more details.
2421 */
2422
2423 static void
2424 set_proc_siginfo (pip, signo)
2425 struct procinfo *pip;
2426 int signo;
2427 {
2428 struct siginfo newsiginfo;
2429 struct siginfo *sip;
2430
2431 if (signo == pip -> prstatus.pr_info.si_signo)
2432 {
2433 sip = &pip -> prstatus.pr_info;
2434 }
2435 else
2436 {
2437 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2438 sip = &newsiginfo;
2439 sip -> si_signo = signo;
2440 sip -> si_code = 0;
2441 sip -> si_errno = 0;
2442 sip -> si_pid = getpid ();
2443 sip -> si_uid = getuid ();
2444 }
2445 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2446 {
2447 print_sys_errmsg (pip -> pathname, errno);
2448 warning ("PIOCSSIG failed");
2449 }
2450 }
2451
2452 /* Resume execution of process PID. If STEP is nozero, then
2453 just single step it. If SIGNAL is nonzero, restart it with that
2454 signal activated. */
2455
2456 static void
2457 procfs_resume (pid, step, signo)
2458 int pid;
2459 int step;
2460 enum target_signal signo;
2461 {
2462 int signal_to_pass;
2463 struct procinfo *pi, *procinfo;
2464
2465 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
2466
2467 errno = 0;
2468 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2469
2470 #if 0
2471 /* It should not be necessary. If the user explicitly changes the value,
2472 value_assign calls write_register_bytes, which writes it. */
2473 /* It may not be absolutely necessary to specify the PC value for
2474 restarting, but to be safe we use the value that gdb considers
2475 to be current. One case where this might be necessary is if the
2476 user explicitly changes the PC value that gdb considers to be
2477 current. FIXME: Investigate if this is necessary or not. */
2478
2479 #ifdef PRSVADDR_BROKEN
2480 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2481 place to put nPC. In fact, if you use this, nPC seems to be set to some
2482 random garbage. We have to rely on the fact that PC and nPC have been
2483 written previously via PIOCSREG during a register flush. */
2484
2485 pi->prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
2486 pi->prrun.pr_flags != PRSVADDR;
2487 #endif
2488 #endif
2489
2490 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
2491 /* When attaching to a child process, if we forced it to stop with
2492 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2493 Upon resuming the first time after such a stop, we explicitly
2494 inhibit sending it another SIGSTOP, which would be the normal
2495 result of default signal handling. One potential drawback to
2496 this is that we will also ignore any attempt to by the user
2497 to explicitly continue after the attach with a SIGSTOP. Ultimately
2498 this problem should be dealt with by making the routines that
2499 deal with the inferior a little smarter, and possibly even allow
2500 an inferior to continue running at the same time as gdb. (FIXME?) */
2501 signal_to_pass = 0;
2502 else if (signo == TARGET_SIGNAL_TSTP
2503 && pi->prstatus.pr_cursig == SIGTSTP
2504 && pi->prstatus.pr_action.sa_handler == SIG_DFL)
2505
2506 /* We are about to pass the inferior a SIGTSTP whose action is
2507 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2508 (notifying the parent via wait()), and then keep going from the
2509 same place when the parent is ready for you to keep going. So
2510 under the debugger, it should do nothing (as if the program had
2511 been stopped and then later resumed. Under ptrace, this
2512 happens for us, but under /proc, the system obligingly stops
2513 the process, and wait_for_inferior would have no way of
2514 distinguishing that type of stop (which indicates that we
2515 should just start it again), with a stop due to the pr_trace
2516 field of the prrun_t struct.
2517
2518 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2519 because the handler needs to get executed. */
2520 signal_to_pass = 0;
2521 else
2522 signal_to_pass = target_signal_to_host (signo);
2523
2524 if (signal_to_pass)
2525 {
2526 set_proc_siginfo (pi, signal_to_pass);
2527 }
2528 else
2529 {
2530 pi->prrun.pr_flags |= PRCSIG;
2531 }
2532 pi->nopass_next_sigstop = 0;
2533 if (step)
2534 {
2535 pi->prrun.pr_flags |= PRSTEP;
2536 }
2537 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2538 {
2539 perror_with_name (pi->pathname);
2540 /* NOTREACHED */
2541 }
2542
2543 pi->had_event = 0;
2544
2545 /* Continue all the other threads that haven't had an event of
2546 interest. */
2547
2548 if (pid == -1)
2549 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2550 {
2551 if (pi != procinfo && !procinfo->had_event)
2552 {
2553 procinfo->prrun.pr_flags &= PRSTEP;
2554 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
2555 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2556 if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
2557 {
2558 if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
2559 {
2560 fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
2561 }
2562 print_sys_errmsg (procinfo->pathname, errno);
2563 error ("PIOCRUN failed");
2564 }
2565 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2566 }
2567 }
2568 }
2569
2570 /*
2571
2572 LOCAL FUNCTION
2573
2574 procfs_fetch_registers -- fetch current registers from inferior
2575
2576 SYNOPSIS
2577
2578 void procfs_fetch_registers (int regno)
2579
2580 DESCRIPTION
2581
2582 Read the current values of the inferior's registers, both the
2583 general register set and floating point registers (if supported)
2584 and update gdb's idea of their current values.
2585
2586 */
2587
2588 static void
2589 procfs_fetch_registers (regno)
2590 int regno;
2591 {
2592 struct procinfo *pi;
2593
2594 pi = current_procinfo;
2595
2596 if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
2597 {
2598 supply_gregset (&pi->gregset);
2599 }
2600 #if defined (FP0_REGNUM)
2601 if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
2602 {
2603 supply_fpregset (&pi->fpregset);
2604 }
2605 #endif
2606 }
2607
2608 /*
2609
2610 LOCAL FUNCTION
2611
2612 proc_init_failed - called whenever /proc access initialization
2613 fails
2614
2615 SYNOPSIS
2616
2617 static void proc_init_failed (struct procinfo *pi, char *why)
2618
2619 DESCRIPTION
2620
2621 This function is called whenever initialization of access to a /proc
2622 entry fails. It prints a suitable error message, does some cleanup,
2623 and then invokes the standard error processing routine which dumps
2624 us back into the command loop.
2625 */
2626
2627 static void
2628 proc_init_failed (pi, why)
2629 struct procinfo *pi;
2630 char *why;
2631 {
2632 print_sys_errmsg (pi->pathname, errno);
2633 kill (pi->pid, SIGKILL);
2634 close_proc_file (pi);
2635 error (why);
2636 /* NOTREACHED */
2637 }
2638
2639 /*
2640
2641 LOCAL FUNCTION
2642
2643 close_proc_file - close any currently open /proc entry
2644
2645 SYNOPSIS
2646
2647 static void close_proc_file (struct procinfo *pip)
2648
2649 DESCRIPTION
2650
2651 Close any currently open /proc entry and mark the process information
2652 entry as invalid. In order to ensure that we don't try to reuse any
2653 stale information, the pid, fd, and pathnames are explicitly
2654 invalidated, which may be overkill.
2655
2656 */
2657
2658 static void
2659 close_proc_file (pip)
2660 struct procinfo *pip;
2661 {
2662 struct procinfo *procinfo;
2663
2664 remove_fd (pip); /* Remove fd from poll/select list */
2665
2666 close (pip -> fd);
2667
2668 free (pip -> pathname);
2669
2670 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2671
2672 if (procinfo_list == pip)
2673 procinfo_list = pip->next;
2674 else
2675 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2676 if (procinfo->next == pip)
2677 procinfo->next = pip->next;
2678
2679 free (pip);
2680 }
2681
2682 /*
2683
2684 LOCAL FUNCTION
2685
2686 open_proc_file - open a /proc entry for a given process id
2687
2688 SYNOPSIS
2689
2690 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2691
2692 DESCRIPTION
2693
2694 Given a process id and a mode, close the existing open /proc
2695 entry (if any) and open one for the new process id, in the
2696 specified mode. Once it is open, then mark the local process
2697 information structure as valid, which guarantees that the pid,
2698 fd, and pathname fields match an open /proc entry. Returns
2699 zero if the open fails, nonzero otherwise.
2700
2701 Note that the pathname is left intact, even when the open fails,
2702 so that callers can use it to construct meaningful error messages
2703 rather than just "file open failed".
2704 */
2705
2706 static int
2707 open_proc_file (pid, pip, mode)
2708 int pid;
2709 struct procinfo *pip;
2710 int mode;
2711 {
2712 pip -> next = NULL;
2713 pip -> had_event = 0;
2714 pip -> pathname = xmalloc (32);
2715 pip -> pid = pid;
2716
2717 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2718 if ((pip -> fd = open (pip -> pathname, mode)) < 0)
2719 return 0;
2720
2721 return 1;
2722 }
2723
2724 static char *
2725 mappingflags (flags)
2726 long flags;
2727 {
2728 static char asciiflags[8];
2729
2730 strcpy (asciiflags, "-------");
2731 #if defined (MA_PHYS)
2732 if (flags & MA_PHYS) asciiflags[0] = 'd';
2733 #endif
2734 if (flags & MA_STACK) asciiflags[1] = 's';
2735 if (flags & MA_BREAK) asciiflags[2] = 'b';
2736 if (flags & MA_SHARED) asciiflags[3] = 's';
2737 if (flags & MA_READ) asciiflags[4] = 'r';
2738 if (flags & MA_WRITE) asciiflags[5] = 'w';
2739 if (flags & MA_EXEC) asciiflags[6] = 'x';
2740 return (asciiflags);
2741 }
2742
2743 static void
2744 info_proc_flags (pip, summary)
2745 struct procinfo *pip;
2746 int summary;
2747 {
2748 struct trans *transp;
2749
2750 printf_filtered ("%-32s", "Process status flags:");
2751 if (!summary)
2752 {
2753 printf_filtered ("\n\n");
2754 }
2755 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2756 {
2757 if (pip -> prstatus.pr_flags & transp -> value)
2758 {
2759 if (summary)
2760 {
2761 printf_filtered ("%s ", transp -> name);
2762 }
2763 else
2764 {
2765 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2766 }
2767 }
2768 }
2769 printf_filtered ("\n");
2770 }
2771
2772 static void
2773 info_proc_stop (pip, summary)
2774 struct procinfo *pip;
2775 int summary;
2776 {
2777 struct trans *transp;
2778 int why;
2779 int what;
2780
2781 why = pip -> prstatus.pr_why;
2782 what = pip -> prstatus.pr_what;
2783
2784 if (pip -> prstatus.pr_flags & PR_STOPPED)
2785 {
2786 printf_filtered ("%-32s", "Reason for stopping:");
2787 if (!summary)
2788 {
2789 printf_filtered ("\n\n");
2790 }
2791 for (transp = pr_why_table; transp -> name != NULL; transp++)
2792 {
2793 if (why == transp -> value)
2794 {
2795 if (summary)
2796 {
2797 printf_filtered ("%s ", transp -> name);
2798 }
2799 else
2800 {
2801 printf_filtered ("\t%-16s %s.\n",
2802 transp -> name, transp -> desc);
2803 }
2804 break;
2805 }
2806 }
2807
2808 /* Use the pr_why field to determine what the pr_what field means, and
2809 print more information. */
2810
2811 switch (why)
2812 {
2813 case PR_REQUESTED:
2814 /* pr_what is unused for this case */
2815 break;
2816 case PR_JOBCONTROL:
2817 case PR_SIGNALLED:
2818 if (summary)
2819 {
2820 printf_filtered ("%s ", signalname (what));
2821 }
2822 else
2823 {
2824 printf_filtered ("\t%-16s %s.\n", signalname (what),
2825 safe_strsignal (what));
2826 }
2827 break;
2828 case PR_SYSENTRY:
2829 if (summary)
2830 {
2831 printf_filtered ("%s ", syscallname (what));
2832 }
2833 else
2834 {
2835 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2836 "Entered this system call");
2837 }
2838 break;
2839 case PR_SYSEXIT:
2840 if (summary)
2841 {
2842 printf_filtered ("%s ", syscallname (what));
2843 }
2844 else
2845 {
2846 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2847 "Returned from this system call");
2848 }
2849 break;
2850 case PR_FAULTED:
2851 if (summary)
2852 {
2853 printf_filtered ("%s ",
2854 lookupname (faults_table, what, "fault"));
2855 }
2856 else
2857 {
2858 printf_filtered ("\t%-16s %s.\n",
2859 lookupname (faults_table, what, "fault"),
2860 lookupdesc (faults_table, what));
2861 }
2862 break;
2863 }
2864 printf_filtered ("\n");
2865 }
2866 }
2867
2868 static void
2869 info_proc_siginfo (pip, summary)
2870 struct procinfo *pip;
2871 int summary;
2872 {
2873 struct siginfo *sip;
2874
2875 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2876 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2877 pip -> prstatus.pr_why == PR_FAULTED))
2878 {
2879 printf_filtered ("%-32s", "Additional signal/fault info:");
2880 sip = &pip -> prstatus.pr_info;
2881 if (summary)
2882 {
2883 printf_filtered ("%s ", signalname (sip -> si_signo));
2884 if (sip -> si_errno > 0)
2885 {
2886 printf_filtered ("%s ", errnoname (sip -> si_errno));
2887 }
2888 if (sip -> si_code <= 0)
2889 {
2890 printf_filtered ("sent by %s, uid %d ",
2891 target_pid_to_str (sip -> si_pid),
2892 sip -> si_uid);
2893 }
2894 else
2895 {
2896 printf_filtered ("%s ", sigcodename (sip));
2897 if ((sip -> si_signo == SIGILL) ||
2898 (sip -> si_signo == SIGFPE) ||
2899 (sip -> si_signo == SIGSEGV) ||
2900 (sip -> si_signo == SIGBUS))
2901 {
2902 printf_filtered ("addr=%#x ", sip -> si_addr);
2903 }
2904 else if ((sip -> si_signo == SIGCHLD))
2905 {
2906 printf_filtered ("child %s, status %u ",
2907 target_pid_to_str (sip -> si_pid),
2908 sip -> si_status);
2909 }
2910 else if ((sip -> si_signo == SIGPOLL))
2911 {
2912 printf_filtered ("band %u ", sip -> si_band);
2913 }
2914 }
2915 }
2916 else
2917 {
2918 printf_filtered ("\n\n");
2919 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
2920 safe_strsignal (sip -> si_signo));
2921 if (sip -> si_errno > 0)
2922 {
2923 printf_filtered ("\t%-16s %s.\n",
2924 errnoname (sip -> si_errno),
2925 safe_strerror (sip -> si_errno));
2926 }
2927 if (sip -> si_code <= 0)
2928 {
2929 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2930 "PID of process sending signal");
2931 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2932 "UID of process sending signal");
2933 }
2934 else
2935 {
2936 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2937 sigcodedesc (sip));
2938 if ((sip -> si_signo == SIGILL) ||
2939 (sip -> si_signo == SIGFPE))
2940 {
2941 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2942 "Address of faulting instruction");
2943 }
2944 else if ((sip -> si_signo == SIGSEGV) ||
2945 (sip -> si_signo == SIGBUS))
2946 {
2947 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2948 "Address of faulting memory reference");
2949 }
2950 else if ((sip -> si_signo == SIGCHLD))
2951 {
2952 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2953 "Child process ID");
2954 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2955 "Child process exit value or signal");
2956 }
2957 else if ((sip -> si_signo == SIGPOLL))
2958 {
2959 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2960 "Band event for POLL_{IN,OUT,MSG}");
2961 }
2962 }
2963 }
2964 printf_filtered ("\n");
2965 }
2966 }
2967
2968 static void
2969 info_proc_syscalls (pip, summary)
2970 struct procinfo *pip;
2971 int summary;
2972 {
2973 int syscallnum;
2974
2975 if (!summary)
2976 {
2977
2978 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
2979 if (pip -> prstatus.pr_flags & PR_ASLEEP)
2980 {
2981 int syscallnum = pip -> prstatus.pr_reg[R_D0];
2982 if (summary)
2983 {
2984 printf_filtered ("%-32s", "Sleeping in system call:");
2985 printf_filtered ("%s", syscallname (syscallnum));
2986 }
2987 else
2988 {
2989 printf_filtered ("Sleeping in system call '%s'.\n",
2990 syscallname (syscallnum));
2991 }
2992 }
2993 #endif
2994
2995 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
2996 {
2997 print_sys_errmsg (pip -> pathname, errno);
2998 error ("PIOCGENTRY failed");
2999 }
3000
3001 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
3002 {
3003 print_sys_errmsg (pip -> pathname, errno);
3004 error ("PIOCGEXIT failed");
3005 }
3006
3007 printf_filtered ("System call tracing information:\n\n");
3008
3009 printf_filtered ("\t%-12s %-8s %-8s\n",
3010 "System call",
3011 "Entry",
3012 "Exit");
3013 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
3014 {
3015 QUIT;
3016 if (syscall_table[syscallnum] != NULL)
3017 {
3018 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
3019 printf_filtered ("%-8s ",
3020 prismember (&pip -> entryset, syscallnum)
3021 ? "on" : "off");
3022 printf_filtered ("%-8s ",
3023 prismember (&pip -> exitset, syscallnum)
3024 ? "on" : "off");
3025 printf_filtered ("\n");
3026 }
3027 }
3028 printf_filtered ("\n");
3029 }
3030 }
3031
3032 static char *
3033 signalname (signo)
3034 int signo;
3035 {
3036 char *name;
3037 static char locbuf[32];
3038
3039 name = strsigno (signo);
3040 if (name == NULL)
3041 {
3042 sprintf (locbuf, "Signal %d", signo);
3043 }
3044 else
3045 {
3046 sprintf (locbuf, "%s (%d)", name, signo);
3047 }
3048 return (locbuf);
3049 }
3050
3051 static char *
3052 errnoname (errnum)
3053 int errnum;
3054 {
3055 char *name;
3056 static char locbuf[32];
3057
3058 name = strerrno (errnum);
3059 if (name == NULL)
3060 {
3061 sprintf (locbuf, "Errno %d", errnum);
3062 }
3063 else
3064 {
3065 sprintf (locbuf, "%s (%d)", name, errnum);
3066 }
3067 return (locbuf);
3068 }
3069
3070 static void
3071 info_proc_signals (pip, summary)
3072 struct procinfo *pip;
3073 int summary;
3074 {
3075 int signo;
3076
3077 if (!summary)
3078 {
3079 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
3080 {
3081 print_sys_errmsg (pip -> pathname, errno);
3082 error ("PIOCGTRACE failed");
3083 }
3084
3085 printf_filtered ("Disposition of signals:\n\n");
3086 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3087 "Signal", "Trace", "Hold", "Pending", "Description");
3088 for (signo = 0; signo < NSIG; signo++)
3089 {
3090 QUIT;
3091 printf_filtered ("\t%-15s ", signalname (signo));
3092 printf_filtered ("%-8s ",
3093 prismember (&pip -> trace, signo)
3094 ? "on" : "off");
3095 printf_filtered ("%-8s ",
3096 prismember (&pip -> prstatus.pr_sighold, signo)
3097 ? "on" : "off");
3098 printf_filtered ("%-8s ",
3099 prismember (&pip -> prstatus.pr_sigpend, signo)
3100 ? "yes" : "no");
3101 printf_filtered (" %s\n", safe_strsignal (signo));
3102 }
3103 printf_filtered ("\n");
3104 }
3105 }
3106
3107 static void
3108 info_proc_faults (pip, summary)
3109 struct procinfo *pip;
3110 int summary;
3111 {
3112 struct trans *transp;
3113
3114 if (!summary)
3115 {
3116 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
3117 {
3118 print_sys_errmsg (pip -> pathname, errno);
3119 error ("PIOCGFAULT failed");
3120 }
3121
3122 printf_filtered ("Current traced hardware fault set:\n\n");
3123 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3124
3125 for (transp = faults_table; transp -> name != NULL; transp++)
3126 {
3127 QUIT;
3128 printf_filtered ("\t%-12s ", transp -> name);
3129 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
3130 ? "on" : "off");
3131 printf_filtered ("\n");
3132 }
3133 printf_filtered ("\n");
3134 }
3135 }
3136
3137 static void
3138 info_proc_mappings (pip, summary)
3139 struct procinfo *pip;
3140 int summary;
3141 {
3142 int nmap;
3143 struct prmap *prmaps;
3144 struct prmap *prmap;
3145
3146 if (!summary)
3147 {
3148 printf_filtered ("Mapped address spaces:\n\n");
3149 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3150 "Start Addr",
3151 " End Addr",
3152 " Size",
3153 " Offset",
3154 "Flags");
3155 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
3156 {
3157 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3158 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
3159 {
3160 for (prmap = prmaps; prmap -> pr_size; ++prmap)
3161 {
3162 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
3163 prmap -> pr_vaddr,
3164 prmap -> pr_vaddr + prmap -> pr_size - 1,
3165 prmap -> pr_size,
3166 prmap -> pr_off,
3167 mappingflags (prmap -> pr_mflags));
3168 }
3169 }
3170 }
3171 printf_filtered ("\n");
3172 }
3173 }
3174
3175 /*
3176
3177 LOCAL FUNCTION
3178
3179 info_proc -- implement the "info proc" command
3180
3181 SYNOPSIS
3182
3183 void info_proc (char *args, int from_tty)
3184
3185 DESCRIPTION
3186
3187 Implement gdb's "info proc" command by using the /proc interface
3188 to print status information about any currently running process.
3189
3190 Examples of the use of "info proc" are:
3191
3192 info proc (prints summary info for current inferior)
3193 info proc 123 (prints summary info for process with pid 123)
3194 info proc mappings (prints address mappings)
3195 info proc times (prints process/children times)
3196 info proc id (prints pid, ppid, gid, sid, etc)
3197 FIXME: i proc id not implemented.
3198 info proc status (prints general process state info)
3199 FIXME: i proc status not implemented.
3200 info proc signals (prints info about signal handling)
3201 info proc all (prints all info)
3202
3203 */
3204
3205 static void
3206 info_proc (args, from_tty)
3207 char *args;
3208 int from_tty;
3209 {
3210 int pid;
3211 struct procinfo *pip;
3212 struct cleanup *old_chain;
3213 char **argv;
3214 int argsize;
3215 int summary = 1;
3216 int flags = 0;
3217 int syscalls = 0;
3218 int signals = 0;
3219 int faults = 0;
3220 int mappings = 0;
3221 int times = 0;
3222 int id = 0;
3223 int status = 0;
3224 int all = 0;
3225
3226 old_chain = make_cleanup (null_cleanup, 0);
3227
3228 /* Default to using the current inferior if no pid specified. Note
3229 that inferior_pid may be 0, hence we set okerr. */
3230
3231 pip = find_procinfo (inferior_pid, 1);
3232
3233 if (args != NULL)
3234 {
3235 if ((argv = buildargv (args)) == NULL)
3236 {
3237 nomem (0);
3238 }
3239 make_cleanup (freeargv, (char *) argv);
3240
3241 while (*argv != NULL)
3242 {
3243 argsize = strlen (*argv);
3244 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
3245 {
3246 summary = 0;
3247 all = 1;
3248 }
3249 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
3250 {
3251 summary = 0;
3252 faults = 1;
3253 }
3254 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
3255 {
3256 summary = 0;
3257 flags = 1;
3258 }
3259 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
3260 {
3261 summary = 0;
3262 id = 1;
3263 }
3264 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
3265 {
3266 summary = 0;
3267 mappings = 1;
3268 }
3269 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
3270 {
3271 summary = 0;
3272 signals = 1;
3273 }
3274 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
3275 {
3276 summary = 0;
3277 status = 1;
3278 }
3279 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
3280 {
3281 summary = 0;
3282 syscalls = 1;
3283 }
3284 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
3285 {
3286 summary = 0;
3287 times = 1;
3288 }
3289 else if ((pid = atoi (*argv)) > 0)
3290 {
3291 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
3292 memset (pip, 0, sizeof (*pip));
3293
3294 pip->pid = pid;
3295 if (!open_proc_file (pid, pip, O_RDONLY))
3296 {
3297 perror_with_name (pip -> pathname);
3298 /* NOTREACHED */
3299 }
3300 make_cleanup (close_proc_file, pip);
3301 }
3302 else if (**argv != '\000')
3303 {
3304 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
3305 }
3306 argv++;
3307 }
3308 }
3309
3310 /* If we don't have a valid open process at this point, then we have no
3311 inferior or didn't specify a specific pid. */
3312
3313 if (!pip)
3314 {
3315 error ("\
3316 No process. Start debugging a program or specify an explicit process ID.");
3317 }
3318 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
3319 {
3320 print_sys_errmsg (pip -> pathname, errno);
3321 error ("PIOCSTATUS failed");
3322 }
3323
3324 /* Print verbose information of the requested type(s), or just a summary
3325 of the information for all types. */
3326
3327 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
3328 if (summary || all || flags)
3329 {
3330 info_proc_flags (pip, summary);
3331 }
3332 if (summary || all)
3333 {
3334 info_proc_stop (pip, summary);
3335 }
3336 if (summary || all || signals || faults)
3337 {
3338 info_proc_siginfo (pip, summary);
3339 }
3340 if (summary || all || syscalls)
3341 {
3342 info_proc_syscalls (pip, summary);
3343 }
3344 if (summary || all || mappings)
3345 {
3346 info_proc_mappings (pip, summary);
3347 }
3348 if (summary || all || signals)
3349 {
3350 info_proc_signals (pip, summary);
3351 }
3352 if (summary || all || faults)
3353 {
3354 info_proc_faults (pip, summary);
3355 }
3356 printf_filtered ("\n");
3357
3358 /* All done, deal with closing any temporary process info structure,
3359 freeing temporary memory , etc. */
3360
3361 do_cleanups (old_chain);
3362 }
3363
3364 /*
3365
3366 LOCAL FUNCTION
3367
3368 procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
3369
3370 SYNOPSIS
3371
3372 void procfs_set_sproc_trap (void)
3373
3374 DESCRIPTION
3375
3376 This function sets up a trap on sproc system call exits so that we can
3377 detect the arrival of a new thread. We are called with the child
3378 stopped prior to it's first instruction.
3379
3380 Also note that we turn on the inherit-on-fork flag in the child process
3381 so that any grand-children start with all tracing flags set.
3382 */
3383
3384 #ifdef SYS_sproc
3385
3386 static void
3387 procfs_set_sproc_trap (pi)
3388 struct procinfo *pi;
3389 {
3390 sysset_t exitset;
3391
3392 if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
3393 {
3394 print_sys_errmsg (pi->pathname, errno);
3395 error ("PIOCGEXIT failed");
3396 }
3397
3398 praddset (&exitset, SYS_sproc);
3399
3400 if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
3401 {
3402 print_sys_errmsg (pi->pathname, errno);
3403 error ("PIOCSEXIT failed");
3404 }
3405
3406 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3407 tracing flags set. */
3408
3409 #ifdef PIOCSET /* New method */
3410 {
3411 long pr_flags;
3412 pr_flags = PR_FORK;
3413 ioctl (pi->fd, PIOCSET, &pr_flags);
3414 }
3415 #else
3416 #ifdef PIOCSFORK /* Original method */
3417 ioctl (pi->fd, PIOCSFORK, NULL);
3418 #endif
3419 #endif
3420 }
3421 #endif /* SYS_sproc */
3422
3423 /* Fork an inferior process, and start debugging it with /proc. */
3424
3425 static void
3426 procfs_create_inferior (exec_file, allargs, env)
3427 char *exec_file;
3428 char *allargs;
3429 char **env;
3430 {
3431 char *shell_file = getenv ("SHELL");
3432 char *tryname;
3433 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
3434 {
3435
3436 /* We will be looking down the PATH to find shell_file. If we
3437 just do this the normal way (via execlp, which operates by
3438 attempting an exec for each element of the PATH until it
3439 finds one which succeeds), then there will be an exec for
3440 each failed attempt, each of which will cause a PR_SYSEXIT
3441 stop, and we won't know how to distinguish the PR_SYSEXIT's
3442 for these failed execs with the ones for successful execs
3443 (whether the exec has succeeded is stored at that time in the
3444 carry bit or some such architecture-specific and
3445 non-ABI-specified place).
3446
3447 So I can't think of anything better than to search the PATH
3448 now. This has several disadvantages: (1) There is a race
3449 condition; if we find a file now and it is deleted before we
3450 exec it, we lose, even if the deletion leaves a valid file
3451 further down in the PATH, (2) there is no way to know exactly
3452 what an executable (in the sense of "capable of being
3453 exec'd") file is. Using access() loses because it may lose
3454 if the caller is the superuser; failing to use it loses if
3455 there are ACLs or some such. */
3456
3457 char *p;
3458 char *p1;
3459 /* FIXME-maybe: might want "set path" command so user can change what
3460 path is used from within GDB. */
3461 char *path = getenv ("PATH");
3462 int len;
3463 struct stat statbuf;
3464
3465 if (path == NULL)
3466 path = "/bin:/usr/bin";
3467
3468 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
3469 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
3470 {
3471 p1 = strchr (p, ':');
3472 if (p1 != NULL)
3473 len = p1 - p;
3474 else
3475 len = strlen (p);
3476 strncpy (tryname, p, len);
3477 tryname[len] = '\0';
3478 strcat (tryname, "/");
3479 strcat (tryname, shell_file);
3480 if (access (tryname, X_OK) < 0)
3481 continue;
3482 if (stat (tryname, &statbuf) < 0)
3483 continue;
3484 if (!S_ISREG (statbuf.st_mode))
3485 /* We certainly need to reject directories. I'm not quite
3486 as sure about FIFOs, sockets, etc., but I kind of doubt
3487 that people want to exec() these things. */
3488 continue;
3489 break;
3490 }
3491 if (p == NULL)
3492 /* Not found. This must be an error rather than merely passing
3493 the file to execlp(), because execlp() would try all the
3494 exec()s, causing GDB to get confused. */
3495 error ("Can't find shell %s in PATH", shell_file);
3496
3497 shell_file = tryname;
3498 }
3499
3500 fork_inferior (exec_file, allargs, env,
3501 proc_set_exec_trap, procfs_init_inferior, shell_file);
3502
3503 /* We are at the first instruction we care about. */
3504 /* Pedal to the metal... */
3505
3506 /* Setup traps on exit from sproc() */
3507
3508 #ifdef SYS_sproc
3509 procfs_set_sproc_trap (current_procinfo);
3510 #endif
3511
3512 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
3513 }
3514
3515 /* Clean up after the inferior dies. */
3516
3517 static void
3518 procfs_mourn_inferior ()
3519 {
3520 struct procinfo *pi;
3521
3522 for (pi = procinfo_list; pi; pi = pi->next)
3523 unconditionally_kill_inferior (pi);
3524
3525 unpush_target (&procfs_ops);
3526 generic_mourn_inferior ();
3527 }
3528
3529 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3530 static int
3531 procfs_can_run ()
3532 {
3533 return(1);
3534 }
3535 \f
3536 /* Insert a watchpoint */
3537 int
3538 procfs_set_watchpoint(pid, addr, len, rw)
3539 int pid;
3540 CORE_ADDR addr;
3541 int len;
3542 int rw;
3543 {
3544 struct procinfo *pi;
3545 prwatch_t wpt;
3546
3547 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3548 wpt.pr_vaddr = (caddr_t)addr;
3549 wpt.pr_size = len;
3550 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
3551 if (ioctl (pi->fd, PIOCSWATCH, &wpt) < 0)
3552 {
3553 if (errno == E2BIG)
3554 return -1;
3555 /* Currently it sometimes happens that the same watchpoint gets
3556 deleted twice - don't die in this case (FIXME please) */
3557 if (errno == ESRCH && len == 0)
3558 return 0;
3559 print_sys_errmsg (pi->pathname, errno);
3560 error ("PIOCSWATCH failed");
3561 }
3562 return 0;
3563 }
3564
3565 int
3566 procfs_stopped_by_watchpoint(pid)
3567 int pid;
3568 {
3569 struct procinfo *pi;
3570 short what;
3571 short why;
3572
3573 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3574 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3575 {
3576 why = pi->prstatus.pr_why;
3577 what = pi->prstatus.pr_what;
3578 if (why == PR_FAULTED
3579 && (what == FLTWATCH) || (what == FLTKWATCH))
3580 return what;
3581 }
3582 return 0;
3583 }
3584
3585 \f
3586 struct target_ops procfs_ops = {
3587 "procfs", /* to_shortname */
3588 "Unix /proc child process", /* to_longname */
3589 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3590 procfs_open, /* to_open */
3591 0, /* to_close */
3592 procfs_attach, /* to_attach */
3593 procfs_detach, /* to_detach */
3594 procfs_resume, /* to_resume */
3595 procfs_wait, /* to_wait */
3596 procfs_fetch_registers, /* to_fetch_registers */
3597 procfs_store_registers, /* to_store_registers */
3598 procfs_prepare_to_store, /* to_prepare_to_store */
3599 procfs_xfer_memory, /* to_xfer_memory */
3600 procfs_files_info, /* to_files_info */
3601 memory_insert_breakpoint, /* to_insert_breakpoint */
3602 memory_remove_breakpoint, /* to_remove_breakpoint */
3603 terminal_init_inferior, /* to_terminal_init */
3604 terminal_inferior, /* to_terminal_inferior */
3605 terminal_ours_for_output, /* to_terminal_ours_for_output */
3606 terminal_ours, /* to_terminal_ours */
3607 child_terminal_info, /* to_terminal_info */
3608 procfs_kill_inferior, /* to_kill */
3609 0, /* to_load */
3610 0, /* to_lookup_symbol */
3611 procfs_create_inferior, /* to_create_inferior */
3612 procfs_mourn_inferior, /* to_mourn_inferior */
3613 procfs_can_run, /* to_can_run */
3614 procfs_notice_signals, /* to_notice_signals */
3615 process_stratum, /* to_stratum */
3616 0, /* to_next */
3617 1, /* to_has_all_memory */
3618 1, /* to_has_memory */
3619 1, /* to_has_stack */
3620 1, /* to_has_registers */
3621 1, /* to_has_execution */
3622 0, /* sections */
3623 0, /* sections_end */
3624 OPS_MAGIC /* to_magic */
3625 };
3626
3627 void
3628 _initialize_procfs ()
3629 {
3630 add_target (&procfs_ops);
3631
3632 add_info ("proc", info_proc,
3633 "Show process status information using /proc entry.\n\
3634 Specify process id or use current inferior by default.\n\
3635 Specify keywords for detailed information; default is summary.\n\
3636 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3637 `status', `syscalls', and `times'.\n\
3638 Unambiguous abbreviations may be used.");
3639
3640 init_syscall_table ();
3641 }
GDB Binutils - Deliverables
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