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