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* target.h: Add enum target_waitkind, enum target_signal, and
[deliverable/binutils-gdb.git] / gdb / procfs.c
CommitLineData
35f5886e 1/* Machine independent support for SVR4 /proc (process file system) for GDB.
ec8ceca3 2 Copyright 1991, 1992 Free Software Foundation, Inc.
35f5886e
FF		 3 Written by Fred Fish at Cygnus Support.
4
5This file is part of GDB.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program; if not, write to the Free Software
19Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20
21
22/* N O T E S
23
24For information on the details of using /proc consult section proc(4)
25in the UNIX System V Release 4 System Administrator's Reference Manual.
26
27The general register and floating point register sets are manipulated by
28separate ioctl's. This file makes the assumption that if FP0_REGNUM is
29defined, then support for the floating point register set is desired,
30regardless of whether or not the actual target has floating point hardware.
31
32 */
33
34
5129100c 35#include "defs.h"
35f5886e 36
407a8389 37#include <time.h>
35f5886e
FF		 38#include <sys/procfs.h>
39#include <fcntl.h>
40#include <errno.h>
51b57ded 41#include <string.h>
de43d7d0
SG		 42#include <stropts.h>
43#include <poll.h>
35f5886e 44
35f5886e
FF		 45#include "inferior.h"
46#include "target.h"
51b57ded 47#include "command.h"
3fbdd536 48#include "gdbcore.h"
cc221e76
FF		 49
50#define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
35f5886e
FF		 51
52#ifndef PROC_NAME_FMT
6c316cfd 53#define PROC_NAME_FMT "/proc/%05d"
35f5886e
FF		 54#endif
55
3fbdd536
JG		 56extern struct target_ops procfs_ops; /* Forward declaration */
57
35f5886e
FF		 58#if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
59CORE_ADDR kernel_u_addr;
60#endif
61
cc221e76
FF		 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
35f5886e
FF		 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,
a39ad5ce
FF		 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. */
35f5886e
FF		 77
78struct procinfo {
de43d7d0 79 struct procinfo *next;
35f5886e
FF		 80 int pid; /* Process ID of inferior */
81 int fd; /* File descriptor for /proc entry */
82 char *pathname; /* Pathname to /proc entry */
de43d7d0 83 int had_event; /* poll/select says something happened */
35f5886e 84 int was_stopped; /* Nonzero if was stopped prior to attach */
d65eee73 85 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
35f5886e
FF		 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 */
cc221e76
FF		 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 */
a39ad5ce
FF		 99};
100
de43d7d0
SG		 101/* List of inferior process information */
102static struct procinfo *procinfo_list = NULL;
103
104static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
105
106static int num_poll_list = 0; /* Number of entries in poll_list */
107
108static int last_resume_pid = -1; /* Last pid used with procfs_resume */
35f5886e 109
cc221e76
FF		 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
115struct 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
124static 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",
5c1c5e67
FF		 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",
cc221e76
FF		 164#endif
165 0, NULL, NULL
166};
167
168/* Translate values in the pr_why field of the prstatus struct. */
169
170static 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",
5c1c5e67
FF		 189#endif
190#if defined (PR_SUSPENDED)
191 PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
cc221e76
FF		 192#endif
193 0, NULL, NULL
194};
195
196/* Hardware fault translation table. */
197
198static 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
239static 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
cc221e76
FF		 353static char *syscall_table[MAX_SYSCALLS];
354
1ab3bf1b
JG		 355/* Prototypes for local functions */
356
6b801388
FF		 357static void
358set_proc_siginfo PARAMS ((struct procinfo *, int));
359
cc221e76
FF		 360static void
361init_syscall_table PARAMS ((void));
362
363static char *
364syscallname PARAMS ((int));
365
366static char *
367signalname PARAMS ((int));
368
4ace50a5
FF		 369static char *
370errnoname PARAMS ((int));
371
1ab3bf1b 372static int
de43d7d0 373proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
1ab3bf1b
JG		 374
375static int
ec8ceca3 376open_proc_file PARAMS ((int, struct procinfo *, int));
1ab3bf1b
JG		 377
378static void
379close_proc_file PARAMS ((struct procinfo *));
380
381static void
de43d7d0 382unconditionally_kill_inferior PARAMS ((struct procinfo *));
1ab3bf1b 383
de43d7d0
SG		 384static NORETURN void
385proc_init_failed PARAMS ((struct procinfo *, char *));
1ab3bf1b
JG		 386
387static void
cc221e76
FF		 388info_proc PARAMS ((char *, int));
389
390static void
391info_proc_flags PARAMS ((struct procinfo *, int));
392
393static void
394info_proc_stop PARAMS ((struct procinfo *, int));
1ab3bf1b
JG		 395
396static void
cc221e76
FF		 397info_proc_siginfo PARAMS ((struct procinfo *, int));
398
399static void
400info_proc_syscalls PARAMS ((struct procinfo *, int));
401
402static void
403info_proc_mappings PARAMS ((struct procinfo *, int));
404
405static void
406info_proc_signals PARAMS ((struct procinfo *, int));
407
408static void
409info_proc_faults PARAMS ((struct procinfo *, int));
1ab3bf1b
JG		 410
411static char *
412mappingflags PARAMS ((long));
413
cc221e76
FF		 414static char *
415lookupname PARAMS ((struct trans *, unsigned int, char *));
416
417static char *
418lookupdesc PARAMS ((struct trans *, unsigned int));
419
3fbdd536
JG		 420static int
421do_attach PARAMS ((int pid));
422
423static void
424do_detach PARAMS ((int siggnal));
425
426static void
427procfs_create_inferior PARAMS ((char *, char *, char **));
428
3950a34e 429static void
952a820e 430procfs_notice_signals PARAMS ((int pid));
de43d7d0
SG		 431
432static struct procinfo *
433find_procinfo PARAMS ((pid_t pid, int okfail));
3950a34e 434
1ab3bf1b
JG		 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
438extern void
439supply_gregset PARAMS ((gregset_t *));
440
441extern void
442fill_gregset PARAMS ((gregset_t *, int));
443
444extern void
445supply_fpregset PARAMS ((fpregset_t *));
446
447extern void
448fill_fpregset PARAMS ((fpregset_t *, int));
35f5886e 449
cc221e76
FF		 450/*
451
de43d7d0
SG		 452LOCAL FUNCTION
453
454 find_procinfo -- convert a process id to a struct procinfo
455
456SYNOPSIS
457
458 static struct procinfo * find_procinfo (pid_t pid, int okfail);
459
460DESCRIPTION
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
467static struct procinfo *
468find_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
7c5d526e
SG		 486LOCAL MACRO
487
488 current_procinfo -- convert inferior_pid to a struct procinfo
489
490SYNOPSIS
491
492 static struct procinfo * current_procinfo;
493
494DESCRIPTION
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
de43d7d0
SG		 504LOCAL FUNCTION
505
506 add_fd -- Add the fd to the poll/select list
507
508SYNOPSIS
509
510 static void add_fd (struct procinfo *);
511
512DESCRIPTION
513
514 Add the fd of the supplied procinfo to the list of fds used for
515 poll/select operations.
516 */
517
518static void
519add_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
534static void
535remove_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
7c5d526e 561#define LOSING_POLL unixware_sux
de43d7d0 562
7c5d526e
SG		 563static struct procinfo *
564wait_fd ()
565{
566 struct procinfo *pi;
567 int num_fds;
568 int i;
de43d7d0 569
7c5d526e
SG		 570 if (attach_flag)
571 set_sigint_trap (); /* Causes SIGINT to be passed on to the
572 attached process. */
de43d7d0 573
7c5d526e
SG		 574#ifndef LOSING_POLL
575 num_fds = poll (poll_list, num_poll_list, -1);
576#else
577 pi = current_procinfo;
de43d7d0 578
7c5d526e
SG		 579 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
580 {
581 print_sys_errmsg (pi->pathname, errno);
582 error ("PIOCWSTOP failed");
583 }
fb63d460 584 pi->had_event = 1;
7c5d526e
SG		 585#endif
586
587 if (attach_flag)
588 clear_sigint_trap();
de43d7d0 589
7c5d526e 590#ifndef LOSING_POLL
de43d7d0 591
7c5d526e
SG		 592 if (num_fds <= 0)
593 {
594 print_sys_errmsg ("poll failed\n", errno);
595 error ("Poll failed, returned %d", num_fds);
596 }
597
598 for (i = 0; i < num_poll_list && num_fds > 0; i++)
599 {
600 if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
601 continue;
602 for (pi = procinfo_list; pi; pi = pi->next)
603 {
604 if (poll_list[i].fd == pi->fd)
605 {
606 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
607 {
608 print_sys_errmsg (pi->pathname, errno);
609 error ("PIOCSTATUS failed");
610 }
611 num_fds--;
612 pi->had_event = 1;
613 break;
614 }
615 }
616 if (!pi)
617 error ("procfs_wait: Couldn't find procinfo for fd %d\n",
618 poll_list[i].fd);
619 }
620#endif /* LOSING_POLL */
621
622 return pi;
623}
de43d7d0
SG		 624
625/*
626
cc221e76
FF		 627LOCAL FUNCTION
628
629 lookupdesc -- translate a value to a summary desc string
630
631SYNOPSIS
632
633 static char *lookupdesc (struct trans *transp, unsigned int val);
634
635DESCRIPTION
636
637 Given a pointer to a translation table and a value to be translated,
638 lookup the desc string and return it.
639 */
640
641static char *
642lookupdesc (transp, val)
643 struct trans *transp;
644 unsigned int val;
645{
646 char *desc;
647
648 for (desc = NULL; transp -> name != NULL; transp++)
649 {
650 if (transp -> value == val)
651 {
652 desc = transp -> desc;
653 break;
654 }
655 }
656
657 /* Didn't find a translation for the specified value, set a default one. */
658
659 if (desc == NULL)
660 {
661 desc = "Unknown";
662 }
663 return (desc);
664}
665
666/*
667
668LOCAL FUNCTION
669
670 lookupname -- translate a value to symbolic name
671
672SYNOPSIS
673
674 static char *lookupname (struct trans *transp, unsigned int val,
675 char *prefix);
676
677DESCRIPTION
678
679 Given a pointer to a translation table, a value to be translated,
680 and a default prefix to return if the value can't be translated,
681 match the value with one of the translation table entries and
682 return a pointer to the symbolic name.
683
684 If no match is found it just returns the value as a printable string,
685 with the given prefix. The previous such value, if any, is freed
686 at this time.
687 */
688
689static char *
690lookupname (transp, val, prefix)
691 struct trans *transp;
692 unsigned int val;
693 char *prefix;
694{
695 static char *locbuf;
696 char *name;
697
698 for (name = NULL; transp -> name != NULL; transp++)
699 {
700 if (transp -> value == val)
701 {
702 name = transp -> name;
703 break;
704 }
705 }
706
707 /* Didn't find a translation for the specified value, build a default
708 one using the specified prefix and return it. The lifetime of
709 the value is only until the next one is needed. */
710
711 if (name == NULL)
712 {
713 if (locbuf != NULL)
714 {
715 free (locbuf);
716 }
717 locbuf = xmalloc (strlen (prefix) + 16);
4ed3a9ea 718 sprintf (locbuf, "%s %u", prefix, val);
cc221e76
FF		 719 name = locbuf;
720 }
721 return (name);
722}
723
724static char *
725sigcodename (sip)
726 siginfo_t *sip;
727{
728 struct sigcode *scp;
729 char *name = NULL;
730 static char locbuf[32];
731
732 for (scp = siginfo_table; scp -> codename != NULL; scp++)
733 {
734 if ((scp -> signo == sip -> si_signo) &&
735 (scp -> code == sip -> si_code))
736 {
737 name = scp -> codename;
738 break;
739 }
740 }
741 if (name == NULL)
742 {
4ed3a9ea 743 sprintf (locbuf, "sigcode %u", sip -> si_signo);
cc221e76
FF		 744 name = locbuf;
745 }
746 return (name);
747}
748
3fbdd536
JG		 749static char *
750sigcodedesc (sip)
cc221e76
FF		 751 siginfo_t *sip;
752{
753 struct sigcode *scp;
754 char *desc = NULL;
755
756 for (scp = siginfo_table; scp -> codename != NULL; scp++)
757 {
758 if ((scp -> signo == sip -> si_signo) &&
759 (scp -> code == sip -> si_code))
760 {
761 desc = scp -> desc;
762 break;
763 }
764 }
765 if (desc == NULL)
766 {
767 desc = "Unrecognized signal or trap use";
768 }
769 return (desc);
770}
771
772/*
773
774LOCAL FUNCTION
775
776 syscallname - translate a system call number into a system call name
777
778SYNOPSIS
779
780 char *syscallname (int syscallnum)
781
782DESCRIPTION
783
784 Given a system call number, translate it into the printable name
785 of a system call, or into "syscall <num>" if it is an unknown
786 number.
787 */
788
789static char *
790syscallname (syscallnum)
791 int syscallnum;
792{
793 static char locbuf[32];
794 char *rtnval;
795
796 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
797 {
798 rtnval = syscall_table[syscallnum];
799 }
800 else
801 {
4ed3a9ea 802 sprintf (locbuf, "syscall %u", syscallnum);
cc221e76
FF		 803 rtnval = locbuf;
804 }
805 return (rtnval);
806}
807
808/*
809
810LOCAL FUNCTION
811
812 init_syscall_table - initialize syscall translation table
813
814SYNOPSIS
815
816 void init_syscall_table (void)
817
818DESCRIPTION
819
820 Dynamically initialize the translation table to convert system
821 call numbers into printable system call names. Done once per
822 gdb run, on initialization.
823
824NOTES
825
826 This is awfully ugly, but preprocessor tricks to make it prettier
827 tend to be nonportable.
828 */
829
830static void
831init_syscall_table ()
832{
cc221e76
FF		 833#if defined (SYS_exit)
834 syscall_table[SYS_exit] = "exit";
835#endif
836#if defined (SYS_fork)
837 syscall_table[SYS_fork] = "fork";
838#endif
839#if defined (SYS_read)
840 syscall_table[SYS_read] = "read";
841#endif
842#if defined (SYS_write)
843 syscall_table[SYS_write] = "write";
844#endif
845#if defined (SYS_open)
846 syscall_table[SYS_open] = "open";
847#endif
848#if defined (SYS_close)
849 syscall_table[SYS_close] = "close";
850#endif
851#if defined (SYS_wait)
852 syscall_table[SYS_wait] = "wait";
853#endif
854#if defined (SYS_creat)
855 syscall_table[SYS_creat] = "creat";
856#endif
857#if defined (SYS_link)
858 syscall_table[SYS_link] = "link";
859#endif
860#if defined (SYS_unlink)
861 syscall_table[SYS_unlink] = "unlink";
862#endif
863#if defined (SYS_exec)
864 syscall_table[SYS_exec] = "exec";
865#endif
866#if defined (SYS_execv)
867 syscall_table[SYS_execv] = "execv";
868#endif
869#if defined (SYS_execve)
870 syscall_table[SYS_execve] = "execve";
871#endif
872#if defined (SYS_chdir)
873 syscall_table[SYS_chdir] = "chdir";
874#endif
875#if defined (SYS_time)
876 syscall_table[SYS_time] = "time";
877#endif
878#if defined (SYS_mknod)
879 syscall_table[SYS_mknod] = "mknod";
880#endif
881#if defined (SYS_chmod)
882 syscall_table[SYS_chmod] = "chmod";
883#endif
884#if defined (SYS_chown)
885 syscall_table[SYS_chown] = "chown";
886#endif
887#if defined (SYS_brk)
888 syscall_table[SYS_brk] = "brk";
889#endif
890#if defined (SYS_stat)
891 syscall_table[SYS_stat] = "stat";
892#endif
893#if defined (SYS_lseek)
894 syscall_table[SYS_lseek] = "lseek";
895#endif
896#if defined (SYS_getpid)
897 syscall_table[SYS_getpid] = "getpid";
898#endif
899#if defined (SYS_mount)
900 syscall_table[SYS_mount] = "mount";
901#endif
902#if defined (SYS_umount)
903 syscall_table[SYS_umount] = "umount";
904#endif
905#if defined (SYS_setuid)
906 syscall_table[SYS_setuid] = "setuid";
907#endif
908#if defined (SYS_getuid)
909 syscall_table[SYS_getuid] = "getuid";
910#endif
911#if defined (SYS_stime)
912 syscall_table[SYS_stime] = "stime";
913#endif
914#if defined (SYS_ptrace)
915 syscall_table[SYS_ptrace] = "ptrace";
916#endif
917#if defined (SYS_alarm)
918 syscall_table[SYS_alarm] = "alarm";
919#endif
920#if defined (SYS_fstat)
921 syscall_table[SYS_fstat] = "fstat";
922#endif
923#if defined (SYS_pause)
924 syscall_table[SYS_pause] = "pause";
925#endif
926#if defined (SYS_utime)
927 syscall_table[SYS_utime] = "utime";
928#endif
929#if defined (SYS_stty)
930 syscall_table[SYS_stty] = "stty";
931#endif
932#if defined (SYS_gtty)
933 syscall_table[SYS_gtty] = "gtty";
934#endif
935#if defined (SYS_access)
936 syscall_table[SYS_access] = "access";
937#endif
938#if defined (SYS_nice)
939 syscall_table[SYS_nice] = "nice";
940#endif
941#if defined (SYS_statfs)
942 syscall_table[SYS_statfs] = "statfs";
943#endif
944#if defined (SYS_sync)
945 syscall_table[SYS_sync] = "sync";
946#endif
947#if defined (SYS_kill)
948 syscall_table[SYS_kill] = "kill";
949#endif
950#if defined (SYS_fstatfs)
951 syscall_table[SYS_fstatfs] = "fstatfs";
952#endif
953#if defined (SYS_pgrpsys)
954 syscall_table[SYS_pgrpsys] = "pgrpsys";
955#endif
956#if defined (SYS_xenix)
957 syscall_table[SYS_xenix] = "xenix";
958#endif
959#if defined (SYS_dup)
960 syscall_table[SYS_dup] = "dup";
961#endif
962#if defined (SYS_pipe)
963 syscall_table[SYS_pipe] = "pipe";
964#endif
965#if defined (SYS_times)
966 syscall_table[SYS_times] = "times";
967#endif
968#if defined (SYS_profil)
969 syscall_table[SYS_profil] = "profil";
970#endif
971#if defined (SYS_plock)
972 syscall_table[SYS_plock] = "plock";
973#endif
974#if defined (SYS_setgid)
975 syscall_table[SYS_setgid] = "setgid";
976#endif
977#if defined (SYS_getgid)
978 syscall_table[SYS_getgid] = "getgid";
979#endif
980#if defined (SYS_signal)
981 syscall_table[SYS_signal] = "signal";
982#endif
983#if defined (SYS_msgsys)
984 syscall_table[SYS_msgsys] = "msgsys";
985#endif
986#if defined (SYS_sys3b)
987 syscall_table[SYS_sys3b] = "sys3b";
988#endif
989#if defined (SYS_acct)
990 syscall_table[SYS_acct] = "acct";
991#endif
992#if defined (SYS_shmsys)
993 syscall_table[SYS_shmsys] = "shmsys";
994#endif
995#if defined (SYS_semsys)
996 syscall_table[SYS_semsys] = "semsys";
997#endif
998#if defined (SYS_ioctl)
999 syscall_table[SYS_ioctl] = "ioctl";
1000#endif
1001#if defined (SYS_uadmin)
1002 syscall_table[SYS_uadmin] = "uadmin";
1003#endif
1004#if defined (SYS_utssys)
1005 syscall_table[SYS_utssys] = "utssys";
1006#endif
1007#if defined (SYS_fsync)
1008 syscall_table[SYS_fsync] = "fsync";
1009#endif
1010#if defined (SYS_umask)
1011 syscall_table[SYS_umask] = "umask";
1012#endif
1013#if defined (SYS_chroot)
1014 syscall_table[SYS_chroot] = "chroot";
1015#endif
1016#if defined (SYS_fcntl)
1017 syscall_table[SYS_fcntl] = "fcntl";
1018#endif
1019#if defined (SYS_ulimit)
1020 syscall_table[SYS_ulimit] = "ulimit";
1021#endif
1022#if defined (SYS_rfsys)
1023 syscall_table[SYS_rfsys] = "rfsys";
1024#endif
1025#if defined (SYS_rmdir)
1026 syscall_table[SYS_rmdir] = "rmdir";
1027#endif
1028#if defined (SYS_mkdir)
1029 syscall_table[SYS_mkdir] = "mkdir";
1030#endif
1031#if defined (SYS_getdents)
1032 syscall_table[SYS_getdents] = "getdents";
1033#endif
1034#if defined (SYS_sysfs)
1035 syscall_table[SYS_sysfs] = "sysfs";
1036#endif
1037#if defined (SYS_getmsg)
1038 syscall_table[SYS_getmsg] = "getmsg";
1039#endif
1040#if defined (SYS_putmsg)
1041 syscall_table[SYS_putmsg] = "putmsg";
1042#endif
1043#if defined (SYS_poll)
1044 syscall_table[SYS_poll] = "poll";
1045#endif
1046#if defined (SYS_lstat)
1047 syscall_table[SYS_lstat] = "lstat";
1048#endif
1049#if defined (SYS_symlink)
1050 syscall_table[SYS_symlink] = "symlink";
1051#endif
1052#if defined (SYS_readlink)
1053 syscall_table[SYS_readlink] = "readlink";
1054#endif
1055#if defined (SYS_setgroups)
1056 syscall_table[SYS_setgroups] = "setgroups";
1057#endif
1058#if defined (SYS_getgroups)
1059 syscall_table[SYS_getgroups] = "getgroups";
1060#endif
1061#if defined (SYS_fchmod)
1062 syscall_table[SYS_fchmod] = "fchmod";
1063#endif
1064#if defined (SYS_fchown)
1065 syscall_table[SYS_fchown] = "fchown";
1066#endif
1067#if defined (SYS_sigprocmask)
1068 syscall_table[SYS_sigprocmask] = "sigprocmask";
1069#endif
1070#if defined (SYS_sigsuspend)
1071 syscall_table[SYS_sigsuspend] = "sigsuspend";
1072#endif
1073#if defined (SYS_sigaltstack)
1074 syscall_table[SYS_sigaltstack] = "sigaltstack";
1075#endif
1076#if defined (SYS_sigaction)
1077 syscall_table[SYS_sigaction] = "sigaction";
1078#endif
1079#if defined (SYS_sigpending)
1080 syscall_table[SYS_sigpending] = "sigpending";
1081#endif
1082#if defined (SYS_context)
1083 syscall_table[SYS_context] = "context";
1084#endif
1085#if defined (SYS_evsys)
1086 syscall_table[SYS_evsys] = "evsys";
1087#endif
1088#if defined (SYS_evtrapret)
1089 syscall_table[SYS_evtrapret] = "evtrapret";
1090#endif
1091#if defined (SYS_statvfs)
1092 syscall_table[SYS_statvfs] = "statvfs";
1093#endif
1094#if defined (SYS_fstatvfs)
1095 syscall_table[SYS_fstatvfs] = "fstatvfs";
1096#endif
1097#if defined (SYS_nfssys)
1098 syscall_table[SYS_nfssys] = "nfssys";
1099#endif
1100#if defined (SYS_waitsys)
1101 syscall_table[SYS_waitsys] = "waitsys";
1102#endif
1103#if defined (SYS_sigsendsys)
1104 syscall_table[SYS_sigsendsys] = "sigsendsys";
1105#endif
1106#if defined (SYS_hrtsys)
1107 syscall_table[SYS_hrtsys] = "hrtsys";
1108#endif
1109#if defined (SYS_acancel)
1110 syscall_table[SYS_acancel] = "acancel";
1111#endif
1112#if defined (SYS_async)
1113 syscall_table[SYS_async] = "async";
1114#endif
1115#if defined (SYS_priocntlsys)
1116 syscall_table[SYS_priocntlsys] = "priocntlsys";
1117#endif
1118#if defined (SYS_pathconf)
1119 syscall_table[SYS_pathconf] = "pathconf";
1120#endif
1121#if defined (SYS_mincore)
1122 syscall_table[SYS_mincore] = "mincore";
1123#endif
1124#if defined (SYS_mmap)
1125 syscall_table[SYS_mmap] = "mmap";
1126#endif
1127#if defined (SYS_mprotect)
1128 syscall_table[SYS_mprotect] = "mprotect";
1129#endif
1130#if defined (SYS_munmap)
1131 syscall_table[SYS_munmap] = "munmap";
1132#endif
1133#if defined (SYS_fpathconf)
1134 syscall_table[SYS_fpathconf] = "fpathconf";
1135#endif
1136#if defined (SYS_vfork)
1137 syscall_table[SYS_vfork] = "vfork";
1138#endif
1139#if defined (SYS_fchdir)
1140 syscall_table[SYS_fchdir] = "fchdir";
1141#endif
1142#if defined (SYS_readv)
1143 syscall_table[SYS_readv] = "readv";
1144#endif
1145#if defined (SYS_writev)
1146 syscall_table[SYS_writev] = "writev";
1147#endif
1148#if defined (SYS_xstat)
1149 syscall_table[SYS_xstat] = "xstat";
1150#endif
1151#if defined (SYS_lxstat)
1152 syscall_table[SYS_lxstat] = "lxstat";
1153#endif
1154#if defined (SYS_fxstat)
1155 syscall_table[SYS_fxstat] = "fxstat";
1156#endif
1157#if defined (SYS_xmknod)
1158 syscall_table[SYS_xmknod] = "xmknod";
1159#endif
1160#if defined (SYS_clocal)
1161 syscall_table[SYS_clocal] = "clocal";
1162#endif
1163#if defined (SYS_setrlimit)
1164 syscall_table[SYS_setrlimit] = "setrlimit";
1165#endif
1166#if defined (SYS_getrlimit)
1167 syscall_table[SYS_getrlimit] = "getrlimit";
1168#endif
1169#if defined (SYS_lchown)
1170 syscall_table[SYS_lchown] = "lchown";
1171#endif
1172#if defined (SYS_memcntl)
1173 syscall_table[SYS_memcntl] = "memcntl";
1174#endif
1175#if defined (SYS_getpmsg)
1176 syscall_table[SYS_getpmsg] = "getpmsg";
1177#endif
1178#if defined (SYS_putpmsg)
1179 syscall_table[SYS_putpmsg] = "putpmsg";
1180#endif
1181#if defined (SYS_rename)
1182 syscall_table[SYS_rename] = "rename";
1183#endif
1184#if defined (SYS_uname)
1185 syscall_table[SYS_uname] = "uname";
1186#endif
1187#if defined (SYS_setegid)
1188 syscall_table[SYS_setegid] = "setegid";
1189#endif
1190#if defined (SYS_sysconfig)
1191 syscall_table[SYS_sysconfig] = "sysconfig";
1192#endif
1193#if defined (SYS_adjtime)
1194 syscall_table[SYS_adjtime] = "adjtime";
1195#endif
1196#if defined (SYS_systeminfo)
1197 syscall_table[SYS_systeminfo] = "systeminfo";
1198#endif
1199#if defined (SYS_seteuid)
1200 syscall_table[SYS_seteuid] = "seteuid";
1201#endif
de43d7d0
SG		 1202#if defined (SYS_sproc)
1203 syscall_table[SYS_sproc] = "sproc";
1204#endif
cc221e76 1205}
35f5886e
FF		 1206
1207/*
1208
1209GLOBAL FUNCTION
1210
1211 ptrace -- override library version to force errors for /proc version
1212
1213SYNOPSIS
1214
e676a15f 1215 int ptrace (int request, int pid, PTRACE_ARG3_TYPE arg3, int arg4)
35f5886e
FF		 1216
1217DESCRIPTION
1218
1219 When gdb is configured to use /proc, it should not be calling
1220 or otherwise attempting to use ptrace. In order to catch errors
1221 where use of /proc is configured, but some routine is still calling
1222 ptrace, we provide a local version of a function with that name
1223 that does nothing but issue an error message.
1224*/
1225
1226int
1ab3bf1b
JG		 1227ptrace (request, pid, arg3, arg4)
1228 int request;
1229 int pid;
e676a15f 1230 PTRACE_ARG3_TYPE arg3;
1ab3bf1b 1231 int arg4;
35f5886e
FF		 1232{
1233 error ("internal error - there is a call to ptrace() somewhere");
1234 /*NOTREACHED*/
1235}
1236
1237/*
1238
3fbdd536 1239LOCAL FUNCTION
35f5886e 1240
3fbdd536 1241 procfs_kill_inferior - kill any currently inferior
35f5886e
FF		 1242
1243SYNOPSIS
1244
3fbdd536 1245 void procfs_kill_inferior (void)
35f5886e
FF		 1246
1247DESCRIPTION
1248
1249 Kill any current inferior.
1250
1251NOTES
1252
1253 Kills even attached inferiors. Presumably the user has already
1254 been prompted that the inferior is an attached one rather than
1255 one started by gdb. (FIXME?)
1256
1257*/
1258
3fbdd536
JG		 1259static void
1260procfs_kill_inferior ()
35f5886e 1261{
de43d7d0 1262 target_mourn_inferior ();
35f5886e
FF		 1263}
1264
1265/*
1266
1267LOCAL FUNCTION
1268
1269 unconditionally_kill_inferior - terminate the inferior
1270
1271SYNOPSIS
1272
de43d7d0 1273 static void unconditionally_kill_inferior (struct procinfo *)
35f5886e
FF		 1274
1275DESCRIPTION
1276
de43d7d0 1277 Kill the specified inferior.
35f5886e
FF		 1278
1279NOTE
1280
1281 A possibly useful enhancement would be to first try sending
1282 the inferior a terminate signal, politely asking it to commit
de43d7d0
SG		 1283 suicide, before we murder it (we could call that
1284 politely_kill_inferior()).
35f5886e
FF		 1285
1286*/
1287
1288static void
de43d7d0
SG		 1289unconditionally_kill_inferior (pi)
1290 struct procinfo *pi;
35f5886e
FF		 1291{
1292 int signo;
de43d7d0 1293 int ppid;
35f5886e 1294
de43d7d0
SG		 1295 ppid = pi->prstatus.pr_ppid;
1296
35f5886e 1297 signo = SIGKILL;
de43d7d0
SG		 1298 ioctl (pi->fd, PIOCKILL, &signo);
1299 close_proc_file (pi);
1300
1301/* Only wait() for our direct children. Our grandchildren zombies are killed
1302 by the death of their parents. */
1303
1304 if (ppid == getpid())
1305 wait ((int *) 0);
35f5886e
FF		 1306}
1307
1308/*
1309
3fbdd536 1310LOCAL FUNCTION
35f5886e 1311
3fbdd536 1312 procfs_xfer_memory -- copy data to or from inferior memory space
35f5886e
FF		 1313
1314SYNOPSIS
1315
3fbdd536 1316 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
35f5886e
FF		 1317 int dowrite, struct target_ops target)
1318
1319DESCRIPTION
1320
1321 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1322 from/to debugger memory starting at MYADDR. Copy from inferior
1323 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1324
1325 Returns the length copied, which is either the LEN argument or
3fbdd536 1326 zero. This xfer function does not do partial moves, since procfs_ops
35f5886e
FF		 1327 doesn't allow memory operations to cross below us in the target stack
1328 anyway.
1329
1330NOTES
1331
1332 The /proc interface makes this an almost trivial task.
1333 */
1334
3fbdd536
JG		 1335static int
1336procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1ab3bf1b
JG		 1337 CORE_ADDR memaddr;
1338 char *myaddr;
1339 int len;
1340 int dowrite;
1341 struct target_ops *target; /* ignored */
35f5886e
FF		 1342{
1343 int nbytes = 0;
de43d7d0 1344 struct procinfo *pi;
35f5886e 1345
de43d7d0
SG		 1346 pi = current_procinfo;
1347
1348 if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
35f5886e
FF		 1349 {
1350 if (dowrite)
1351 {
de43d7d0 1352 nbytes = write (pi->fd, myaddr, len);
35f5886e
FF		 1353 }
1354 else
1355 {
de43d7d0 1356 nbytes = read (pi->fd, myaddr, len);
35f5886e
FF		 1357 }
1358 if (nbytes < 0)
1359 {
1360 nbytes = 0;
1361 }
1362 }
1363 return (nbytes);
1364}
1365
1366/*
1367
3fbdd536 1368LOCAL FUNCTION
35f5886e 1369
3fbdd536 1370 procfs_store_registers -- copy register values back to inferior
35f5886e
FF		 1371
1372SYNOPSIS
1373
3fbdd536 1374 void procfs_store_registers (int regno)
35f5886e
FF		 1375
1376DESCRIPTION
1377
1378 Store our current register values back into the inferior. If
1379 REGNO is -1 then store all the register, otherwise store just
1380 the value specified by REGNO.
1381
1382NOTES
1383
1384 If we are storing only a single register, we first have to get all
1385 the current values from the process, overwrite the desired register
1386 in the gregset with the one we want from gdb's registers, and then
1387 send the whole set back to the process. For writing all the
1388 registers, all we have to do is generate the gregset and send it to
1389 the process.
1390
1391 Also note that the process has to be stopped on an event of interest
1392 for this to work, which basically means that it has to have been
1393 run under the control of one of the other /proc ioctl calls and not
1394 ptrace. Since we don't use ptrace anyway, we don't worry about this
1395 fine point, but it is worth noting for future reference.
1396
1397 Gdb is confused about what this function is supposed to return.
1398 Some versions return a value, others return nothing. Some are
1399 declared to return a value and actually return nothing. Gdb ignores
1400 anything returned. (FIXME)
1401
1402 */
1403
3fbdd536
JG		 1404static void
1405procfs_store_registers (regno)
1ab3bf1b 1406 int regno;
35f5886e 1407{
de43d7d0
SG		 1408 struct procinfo *pi;
1409
1410 pi = current_procinfo;
1411
35f5886e
FF		 1412 if (regno != -1)
1413 {
de43d7d0 1414 ioctl (pi->fd, PIOCGREG, &pi->gregset);
35f5886e 1415 }
de43d7d0
SG		 1416 fill_gregset (&pi->gregset, regno);
1417 ioctl (pi->fd, PIOCSREG, &pi->gregset);
35f5886e
FF		 1418
1419#if defined (FP0_REGNUM)
1420
1421 /* Now repeat everything using the floating point register set, if the
1422 target has floating point hardware. Since we ignore the returned value,
1423 we'll never know whether it worked or not anyway. */
1424
1425 if (regno != -1)
1426 {
de43d7d0 1427 ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
35f5886e 1428 }
de43d7d0
SG		 1429 fill_fpregset (&pi->fpregset, regno);
1430 ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
35f5886e
FF		 1431
1432#endif /* FP0_REGNUM */
1433
1434}
1435
1436/*
1437
3fbdd536 1438LOCAL FUNCTION
35f5886e 1439
de43d7d0
SG		 1440 create_procinfo - initialize access to a /proc entry
1441
1442SYNOPSIS
1443
1444 void create_procinfo (int pid)
1445
1446DESCRIPTION
1447
1448 Allocate a procinfo structure, open the /proc file and then sets up
1449 the set of signals and faults that are to be traced.
1450
1451NOTES
1452
1453 If proc_init_failed ever gets called, control returns to the command
1454 processing loop via the standard error handling code.
1455
1456 */
1457
1458static void
1459create_procinfo (pid)
1460 int pid;
1461{
1462 struct procinfo *pi;
1463
1464 if (find_procinfo (pid, 1))
1465 return; /* All done! It already exists */
1466
1467 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1468
1469 if (!open_proc_file (pid, pi, O_RDWR))
1470 proc_init_failed (pi, "can't open process file");
1471
1472 /* Add new process to process info list */
1473
1474 pi->next = procinfo_list;
1475 procinfo_list = pi;
1476
1477 add_fd (pi); /* Add to list for poll/select */
1478
1479 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
1480 prfillset (&pi->prrun.pr_trace);
1481 procfs_notice_signals (pid);
1482 prfillset (&pi->prrun.pr_fault);
1483 prdelset (&pi->prrun.pr_fault, FLTPAGE);
1484
1485 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
1486 proc_init_failed (pi, "PIOCWSTOP failed");
1487
1488 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
1489 proc_init_failed (pi, "PIOCSFAULT failed");
1490}
1491
1492/*
1493
1494LOCAL FUNCTION
1495
1496 procfs_init_inferior - initialize target vector and access to a
1497 /proc entry
35f5886e
FF		 1498
1499SYNOPSIS
1500
3fbdd536 1501 void procfs_init_inferior (int pid)
35f5886e
FF		 1502
1503DESCRIPTION
1504
1505 When gdb starts an inferior, this function is called in the parent
1506 process immediately after the fork. It waits for the child to stop
1507 on the return from the exec system call (the child itself takes care
1508 of ensuring that this is set up), then sets up the set of signals
1509 and faults that are to be traced.
1510
1511NOTES
1512
1513 If proc_init_failed ever gets called, control returns to the command
1514 processing loop via the standard error handling code.
cc221e76 1515
35f5886e
FF		 1516 */
1517
3fbdd536
JG		 1518static void
1519procfs_init_inferior (pid)
1ab3bf1b 1520 int pid;
35f5886e 1521{
3fbdd536
JG		 1522 push_target (&procfs_ops);
1523
de43d7d0
SG		 1524 create_procinfo (pid);
1525 add_thread (pid); /* Setup initial thread */
bc28a06c
JK		 1526
1527 /* One trap to exec the shell, one to exec the program being debugged. */
1528 startup_inferior (2);
35f5886e
FF		 1529}
1530
1531/*
1532
cc221e76
FF		 1533GLOBAL FUNCTION
1534
3950a34e 1535 procfs_notice_signals
cc221e76
FF		 1536
1537SYNOPSIS
1538
952a820e 1539 static void procfs_notice_signals (int pid);
cc221e76
FF		 1540
1541DESCRIPTION
1542
1543 When the user changes the state of gdb's signal handling via the
1544 "handle" command, this function gets called to see if any change
1545 in the /proc interface is required. It is also called internally
1546 by other /proc interface functions to initialize the state of
1547 the traced signal set.
1548
1549 One thing it does is that signals for which the state is "nostop",
1550 "noprint", and "pass", have their trace bits reset in the pr_trace
1551 field, so that they are no longer traced. This allows them to be
1552 delivered directly to the inferior without the debugger ever being
1553 involved.
1554 */
1555
3950a34e 1556static void
de43d7d0 1557procfs_notice_signals (pid)
952a820e 1558 int pid;
cc221e76
FF		 1559{
1560 int signo;
de43d7d0 1561 struct procinfo *pi;
cc221e76 1562
de43d7d0
SG		 1563 pi = find_procinfo (pid, 0);
1564
1565 for (signo = 0; signo < NSIG; signo++)
cc221e76 1566 {
67ac9759
JK		 1567 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
1568 signal_print_state (target_signal_from_host (signo)) == 0 &&
1569 signal_pass_state (target_signal_from_host (signo)) == 1)
cc221e76 1570 {
de43d7d0 1571 prdelset (&pi->prrun.pr_trace, signo);
cc221e76 1572 }
de43d7d0 1573 else
cc221e76 1574 {
de43d7d0 1575 praddset (&pi->prrun.pr_trace, signo);
cc221e76
FF		 1576 }
1577 }
de43d7d0
SG		 1578 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
1579 {
1580 print_sys_errmsg ("PIOCSTRACE failed", errno);
1581 }
cc221e76
FF		 1582}
1583
1584/*
1585
3fbdd536 1586LOCAL FUNCTION
35f5886e
FF		 1587
1588 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1589
1590SYNOPSIS
1591
1592 void proc_set_exec_trap (void)
1593
1594DESCRIPTION
1595
1596 This function is called in the child process when starting up
1597 an inferior, prior to doing the exec of the actual inferior.
1598 It sets the child process's exitset to make exit from the exec
1599 system call an event of interest to stop on, and then simply
1600 returns. The child does the exec, the system call returns, and
1601 the child stops at the first instruction, ready for the gdb
1602 parent process to take control of it.
1603
1604NOTE
1605
1606 We need to use all local variables since the child may be sharing
1607 it's data space with the parent, if vfork was used rather than
1608 fork.
cc221e76
FF		 1609
1610 Also note that we want to turn off the inherit-on-fork flag in
1611 the child process so that any grand-children start with all
1612 tracing flags cleared.
35f5886e
FF		 1613 */
1614
3fbdd536 1615static void
1ab3bf1b 1616proc_set_exec_trap ()
35f5886e
FF		 1617{
1618 sysset_t exitset;
fb63d460 1619 sysset_t entryset;
35f5886e
FF		 1620 auto char procname[32];
1621 int fd;
1622
4ed3a9ea 1623 sprintf (procname, PROC_NAME_FMT, getpid ());
35f5886e
FF		 1624 if ((fd = open (procname, O_RDWR)) < 0)
1625 {
1626 perror (procname);
199b2450 1627 gdb_flush (gdb_stderr);
35f5886e
FF		 1628 _exit (127);
1629 }
1630 premptyset (&exitset);
fb63d460 1631 premptyset (&entryset);
407a8389 1632
cc221e76
FF		 1633 /* GW: Rationale...
1634 Not all systems with /proc have all the exec* syscalls with the same
1635 names. On the SGI, for example, there is no SYS_exec, but there
1636 *is* a SYS_execv. So, we try to account for that. */
1637
407a8389 1638#ifdef SYS_exec
35f5886e 1639 praddset (&exitset, SYS_exec);
407a8389
SG		 1640#endif
1641#ifdef SYS_execve
35f5886e 1642 praddset (&exitset, SYS_execve);
407a8389
SG		 1643#endif
1644#ifdef SYS_execv
fb63d460 1645 praddset (&exitset, SYS_execv);
407a8389
SG		 1646#endif
1647
35f5886e
FF		 1648 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1649 {
1650 perror (procname);
199b2450 1651 gdb_flush (gdb_stderr);
35f5886e
FF		 1652 _exit (127);
1653 }
cc221e76 1654
fb63d460
SG		 1655 praddset (&entryset, SYS_exit);
1656
1657 if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
1658 {
1659 perror (procname);
199b2450 1660 gdb_flush (gdb_stderr);
fb63d460
SG		 1661 _exit (126);
1662 }
1663
cc221e76
FF		 1664 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1665 start with tracing flags cleared. */
1666
5c1c5e67 1667#if defined (PIOCRESET) /* New method */
cc221e76
FF		 1668 {
1669 long pr_flags;
1670 pr_flags = PR_FORK;
4ed3a9ea 1671 ioctl (fd, PIOCRESET, &pr_flags);
cc221e76 1672 }
5c1c5e67
FF		 1673#else
1674#if defined (PIOCRFORK) /* Original method */
4ed3a9ea 1675 ioctl (fd, PIOCRFORK, NULL);
cc221e76 1676#endif
ec8ceca3
JG		 1677#endif
1678
1679 /* Turn on run-on-last-close flag so that this process will not hang
1680 if GDB goes away for some reason. */
1681
1682#if defined (PIOCSET) /* New method */
1683 {
1684 long pr_flags;
1685 pr_flags = PR_RLC;
1686 (void) ioctl (fd, PIOCSET, &pr_flags);
1687 }
1688#else
1689#if defined (PIOCSRLC) /* Original method */
1690 (void) ioctl (fd, PIOCSRLC, 0);
1691#endif
cc221e76 1692#endif
35f5886e
FF		 1693}
1694
f8b76e70
FF		 1695/*
1696
a39ad5ce
FF		 1697GLOBAL FUNCTION
1698
1699 proc_iterate_over_mappings -- call function for every mapped space
1700
1701SYNOPSIS
1702
1703 int proc_iterate_over_mappings (int (*func)())
1704
1705DESCRIPTION
1706
1707 Given a pointer to a function, call that function for every
1708 mapped address space, passing it an open file descriptor for
1709 the file corresponding to that mapped address space (if any)
1710 and the base address of the mapped space. Quit when we hit
1711 the end of the mappings or the function returns nonzero.
1712 */
1713
1714int
1ab3bf1b
JG		 1715proc_iterate_over_mappings (func)
1716 int (*func) PARAMS ((int, CORE_ADDR));
a39ad5ce
FF		 1717{
1718 int nmap;
1719 int fd;
1720 int funcstat = 0;
1721 struct prmap *prmaps;
1722 struct prmap *prmap;
de43d7d0
SG		 1723 struct procinfo *pi;
1724
1725 pi = current_procinfo;
a39ad5ce 1726
de43d7d0 1727 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
a39ad5ce 1728 {
1ab3bf1b 1729 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
de43d7d0 1730 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
a39ad5ce
FF		 1731 {
1732 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1733 {
de43d7d0 1734 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
1ab3bf1b 1735 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
a39ad5ce
FF		 1736 close (fd);
1737 }
1738 }
1739 }
1740 return (funcstat);
1741}
1742
3fbdd536 1743#if 0 /* Currently unused */
a39ad5ce
FF		 1744/*
1745
f8b76e70
FF		 1746GLOBAL FUNCTION
1747
1748 proc_base_address -- find base address for segment containing address
1749
1750SYNOPSIS
1751
1752 CORE_ADDR proc_base_address (CORE_ADDR addr)
1753
1754DESCRIPTION
1755
1756 Given an address of a location in the inferior, find and return
1757 the base address of the mapped segment containing that address.
1758
1759 This is used for example, by the shared library support code,
1760 where we have the pc value for some location in the shared library
1761 where we are stopped, and need to know the base address of the
1762 segment containing that address.
1763*/
1764
f8b76e70 1765CORE_ADDR
1ab3bf1b 1766proc_base_address (addr)
cc221e76 1767 CORE_ADDR addr;
f8b76e70
FF		 1768{
1769 int nmap;
1770 struct prmap *prmaps;
1771 struct prmap *prmap;
1772 CORE_ADDR baseaddr = 0;
de43d7d0 1773 struct procinfo *pi;
f8b76e70 1774
de43d7d0
SG		 1775 pi = current_procinfo;
1776
1777 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
f8b76e70 1778 {
1ab3bf1b 1779 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
de43d7d0 1780 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
f8b76e70
FF		 1781 {
1782 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1783 {
1784 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1785 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1786 {
1787 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1788 break;
1789 }
1790 }
1791 }
1792 }
1793 return (baseaddr);
1794}
1795
1ab3bf1b
JG		 1796#endif /* 0 */
1797
f8b76e70
FF		 1798/*
1799
cc221e76 1800LOCAL FUNCTION
f8b76e70
FF		 1801
1802 proc_address_to_fd -- return open fd for file mapped to address
1803
1804SYNOPSIS
1805
de43d7d0 1806 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
f8b76e70
FF		 1807
1808DESCRIPTION
1809
1810 Given an address in the current inferior's address space, use the
1811 /proc interface to find an open file descriptor for the file that
1812 this address was mapped in from. Return -1 if there is no current
1813 inferior. Print a warning message if there is an inferior but
1814 the address corresponds to no file (IE a bogus address).
1815
1816*/
1817
1ab3bf1b 1818static int
de43d7d0
SG		 1819proc_address_to_fd (pi, addr, complain)
1820 struct procinfo *pi;
1ab3bf1b
JG		 1821 CORE_ADDR addr;
1822 int complain;
f8b76e70
FF		 1823{
1824 int fd = -1;
1825
de43d7d0 1826 if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
f8b76e70 1827 {
de43d7d0 1828 if (complain)
f8b76e70 1829 {
de43d7d0
SG		 1830 print_sys_errmsg (pi->pathname, errno);
1831 warning ("can't find mapped file for address 0x%x", addr);
f8b76e70
FF		 1832 }
1833 }
1834 return (fd);
1835}
1836
35f5886e 1837
3fbdd536
JG		 1838/* Attach to process PID, then initialize for debugging it
1839 and wait for the trace-trap that results from attaching. */
1840
1841static void
1842procfs_attach (args, from_tty)
1843 char *args;
1844 int from_tty;
1845{
1846 char *exec_file;
1847 int pid;
1848
1849 if (!args)
1850 error_no_arg ("process-id to attach");
1851
1852 pid = atoi (args);
1853
1854 if (pid == getpid()) /* Trying to masturbate? */
1855 error ("I refuse to debug myself!");
1856
1857 if (from_tty)
1858 {
1859 exec_file = (char *) get_exec_file (0);
1860
1861 if (exec_file)
199b2450 1862 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
3fbdd536 1863 else
199b2450 1864 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
3fbdd536 1865
199b2450 1866 gdb_flush (gdb_stdout);
3fbdd536
JG		 1867 }
1868
1869 do_attach (pid);
1870 inferior_pid = pid;
1871 push_target (&procfs_ops);
1872}
1873
1874
1875/* Take a program previously attached to and detaches it.
1876 The program resumes execution and will no longer stop
1877 on signals, etc. We'd better not have left any breakpoints
1878 in the program or it'll die when it hits one. For this
1879 to work, it may be necessary for the process to have been
1880 previously attached. It *might* work if the program was
1881 started via the normal ptrace (PTRACE_TRACEME). */
1882
1883static void
1884procfs_detach (args, from_tty)
1885 char *args;
1886 int from_tty;
1887{
1888 int siggnal = 0;
1889
1890 if (from_tty)
1891 {
1892 char *exec_file = get_exec_file (0);
1893 if (exec_file == 0)
1894 exec_file = "";
199b2450 1895 printf_unfiltered ("Detaching from program: %s %s\n",
25286543 1896 exec_file, target_pid_to_str (inferior_pid));
199b2450 1897 gdb_flush (gdb_stdout);
3fbdd536
JG		 1898 }
1899 if (args)
1900 siggnal = atoi (args);
1901
1902 do_detach (siggnal);
1903 inferior_pid = 0;
1904 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
1905}
1906
1907/* Get ready to modify the registers array. On machines which store
1908 individual registers, this doesn't need to do anything. On machines
1909 which store all the registers in one fell swoop, this makes sure
1910 that registers contains all the registers from the program being
1911 debugged. */
1912
1913static void
1914procfs_prepare_to_store ()
1915{
1916#ifdef CHILD_PREPARE_TO_STORE
1917 CHILD_PREPARE_TO_STORE ();
1918#endif
1919}
1920
1921/* Print status information about what we're accessing. */
1922
1923static void
1924procfs_files_info (ignore)
1925 struct target_ops *ignore;
1926{
199b2450 1927 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
25286543 1928 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
3fbdd536
JG		 1929}
1930
1931/* ARGSUSED */
1932static void
1933procfs_open (arg, from_tty)
1934 char *arg;
1935 int from_tty;
1936{
1937 error ("Use the \"run\" command to start a Unix child process.");
1938}
35f5886e
FF		 1939
1940/*
1941
3fbdd536 1942LOCAL FUNCTION
35f5886e 1943
3fbdd536 1944 do_attach -- attach to an already existing process
35f5886e
FF		 1945
1946SYNOPSIS
1947
3fbdd536 1948 int do_attach (int pid)
35f5886e
FF		 1949
1950DESCRIPTION
1951
1952 Attach to an already existing process with the specified process
1953 id. If the process is not already stopped, query whether to
1954 stop it or not.
1955
1956NOTES
1957
1958 The option of stopping at attach time is specific to the /proc
1959 versions of gdb. Versions using ptrace force the attachee
ec8ceca3
JG		 1960 to stop. (I have changed this version to do so, too. All you
1961 have to do is "continue" to make it go on. -- gnu@cygnus.com)
35f5886e
FF		 1962
1963*/
1964
3fbdd536
JG		 1965static int
1966do_attach (pid)
1ab3bf1b 1967 int pid;
35f5886e 1968{
ec8ceca3 1969 int result;
de43d7d0
SG		 1970 struct procinfo *pi;
1971
1972 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
ec8ceca3 1973
de43d7d0 1974 if (!open_proc_file (pid, pi, O_RDWR))
35f5886e 1975 {
de43d7d0
SG		 1976 free (pi);
1977 perror_with_name (pi->pathname);
35f5886e
FF		 1978 /* NOTREACHED */
1979 }
1980
de43d7d0
SG		 1981 /* Add new process to process info list */
1982
1983 pi->next = procinfo_list;
1984 procinfo_list = pi;
1985
1986 add_fd (pi); /* Add to list for poll/select */
1987
35f5886e
FF		 1988 /* Get current status of process and if it is not already stopped,
1989 then stop it. Remember whether or not it was stopped when we first
1990 examined it. */
1991
de43d7d0 1992 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
35f5886e 1993 {
de43d7d0
SG		 1994 print_sys_errmsg (pi->pathname, errno);
1995 close_proc_file (pi);
35f5886e
FF		 1996 error ("PIOCSTATUS failed");
1997 }
de43d7d0 1998 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
35f5886e 1999 {
de43d7d0 2000 pi->was_stopped = 1;
35f5886e
FF		 2001 }
2002 else
2003 {
de43d7d0 2004 pi->was_stopped = 0;
ec8ceca3 2005 if (1 || query ("Process is currently running, stop it? "))
35f5886e 2006 {
ec8ceca3
JG		 2007 /* Make it run again when we close it. */
2008#if defined (PIOCSET) /* New method */
2009 {
2010 long pr_flags;
2011 pr_flags = PR_RLC;
de43d7d0 2012 result = ioctl (pi->fd, PIOCSET, &pr_flags);
ec8ceca3
JG		 2013 }
2014#else
2015#if defined (PIOCSRLC) /* Original method */
de43d7d0 2016 result = ioctl (pi->fd, PIOCSRLC, 0);
ec8ceca3
JG		 2017#endif
2018#endif
2019 if (result < 0)
2020 {
de43d7d0
SG		 2021 print_sys_errmsg (pi->pathname, errno);
2022 close_proc_file (pi);
ec8ceca3
JG		 2023 error ("PIOCSRLC or PIOCSET failed");
2024 }
de43d7d0 2025 if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
35f5886e 2026 {
de43d7d0
SG		 2027 print_sys_errmsg (pi->pathname, errno);
2028 close_proc_file (pi);
35f5886e
FF		 2029 error ("PIOCSTOP failed");
2030 }
de43d7d0 2031 pi->nopass_next_sigstop = 1;
d65eee73
FF		 2032 }
2033 else
2034 {
199b2450 2035 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
35f5886e
FF		 2036 }
2037 }
ec8ceca3 2038
35f5886e
FF		 2039 /* Remember some things about the inferior that we will, or might, change
2040 so that we can restore them when we detach. */
2041
de43d7d0
SG		 2042 ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
2043 ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
2044 ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
2045 ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
2046 ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
35f5886e
FF		 2047
2048 /* Set up trace and fault sets, as gdb expects them. */
2049
de43d7d0
SG		 2050 memset (&pi->prrun, 0, sizeof (pi->prrun));
2051 prfillset (&pi->prrun.pr_trace);
2052 procfs_notice_signals (pid);
2053 prfillset (&pi->prrun.pr_fault);
2054 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2055 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
35f5886e 2056 {
f66f459f 2057 print_sys_errmsg ("PIOCSFAULT failed", errno);
35f5886e 2058 }
de43d7d0 2059 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
35f5886e 2060 {
f66f459f 2061 print_sys_errmsg ("PIOCSTRACE failed", errno);
35f5886e
FF		 2062 }
2063 attach_flag = 1;
2064 return (pid);
2065}
2066
2067/*
2068
3fbdd536 2069LOCAL FUNCTION
35f5886e 2070
3fbdd536 2071 do_detach -- detach from an attached-to process
35f5886e
FF		 2072
2073SYNOPSIS
2074
3fbdd536 2075 void do_detach (int signal)
35f5886e
FF		 2076
2077DESCRIPTION
2078
2079 Detach from the current attachee.
2080
2081 If signal is non-zero, the attachee is started running again and sent
2082 the specified signal.
2083
2084 If signal is zero and the attachee was not already stopped when we
2085 attached to it, then we make it runnable again when we detach.
2086
2087 Otherwise, we query whether or not to make the attachee runnable
2088 again, since we may simply want to leave it in the state it was in
2089 when we attached.
2090
2091 We report any problems, but do not consider them errors, since we
2092 MUST detach even if some things don't seem to go right. This may not
2093 be the ideal situation. (FIXME).
2094 */
2095
3fbdd536
JG		 2096static void
2097do_detach (signal)
1ab3bf1b 2098 int signal;
35f5886e 2099{
ec8ceca3 2100 int result;
de43d7d0
SG		 2101 struct procinfo *pi;
2102
2103 pi = current_procinfo;
ec8ceca3 2104
35f5886e
FF		 2105 if (signal)
2106 {
de43d7d0 2107 set_proc_siginfo (pi, signal);
35f5886e 2108 }
de43d7d0 2109 if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
35f5886e 2110 {
de43d7d0 2111 print_sys_errmsg (pi->pathname, errno);
199b2450 2112 printf_unfiltered ("PIOCSEXIT failed.\n");
35f5886e 2113 }
de43d7d0 2114 if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
35f5886e 2115 {
de43d7d0 2116 print_sys_errmsg (pi->pathname, errno);
199b2450 2117 printf_unfiltered ("PIOCSENTRY failed.\n");
35f5886e 2118 }
de43d7d0 2119 if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
35f5886e 2120 {
de43d7d0 2121 print_sys_errmsg (pi->pathname, errno);
199b2450 2122 printf_unfiltered ("PIOCSTRACE failed.\n");
35f5886e 2123 }
de43d7d0 2124 if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
cc221e76 2125 {
de43d7d0 2126 print_sys_errmsg (pi->pathname, errno);
199b2450 2127 printf_unfiltered ("PIOSCHOLD failed.\n");
cc221e76 2128 }
de43d7d0 2129 if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
35f5886e 2130 {
de43d7d0 2131 print_sys_errmsg (pi->pathname, errno);
199b2450 2132 printf_unfiltered ("PIOCSFAULT failed.\n");
35f5886e 2133 }
de43d7d0 2134 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
35f5886e 2135 {
de43d7d0 2136 print_sys_errmsg (pi->pathname, errno);
199b2450 2137 printf_unfiltered ("PIOCSTATUS failed.\n");
35f5886e
FF		 2138 }
2139 else
2140 {
de43d7d0 2141 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
35f5886e 2142 {
de43d7d0 2143 if (signal || !pi->was_stopped ||
35f5886e
FF		 2144 query ("Was stopped when attached, make it runnable again? "))
2145 {
ec8ceca3 2146 /* Clear any fault that might have stopped it. */
de43d7d0 2147 if (ioctl (pi->fd, PIOCCFAULT, 0))
ec8ceca3 2148 {
de43d7d0 2149 print_sys_errmsg (pi->pathname, errno);
199b2450 2150 printf_unfiltered ("PIOCCFAULT failed.\n");
ec8ceca3
JG		 2151 }
2152
2153 /* Make it run again when we close it. */
2154#if defined (PIOCSET) /* New method */
2155 {
2156 long pr_flags;
2157 pr_flags = PR_RLC;
de43d7d0 2158 result = ioctl (pi->fd, PIOCSET, &pr_flags);
ec8ceca3
JG		 2159 }
2160#else
2161#if defined (PIOCSRLC) /* Original method */
de43d7d0 2162 result = ioctl (pi->fd, PIOCSRLC, 0);
ec8ceca3
JG		 2163#endif
2164#endif
2165 if (result)
35f5886e 2166 {
de43d7d0 2167 print_sys_errmsg (pi->pathname, errno);
199b2450 2168 printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
35f5886e
FF		 2169 }
2170 }
2171 }
2172 }
de43d7d0 2173 close_proc_file (pi);
35f5886e
FF		 2174 attach_flag = 0;
2175}
2176
2177/*
2178
3fbdd536
JG		 2179LOCAL FUNCTION
2180
2181 procfs_wait -- emulate wait() as much as possible
2182 Wait for child to do something. Return pid of child, or -1 in case
2183 of error; store status through argument pointer STATUS.
35f5886e 2184
35f5886e
FF		 2185
2186SYNOPSIS
2187
de43d7d0 2188 int procfs_wait (int pid, int *statloc)
35f5886e
FF		 2189
2190DESCRIPTION
2191
2192 Try to emulate wait() as much as possible. Not sure why we can't
2193 just use wait(), but it seems to have problems when applied to a
2194 process being controlled with the /proc interface.
2195
2196NOTES
2197
2198 We have a race problem here with no obvious solution. We need to let
2199 the inferior run until it stops on an event of interest, which means
2200 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2201 ioctl if the process is already stopped on something that is not an
2202 event of interest, or the call will hang indefinitely. Thus we first
2203 use PIOCSTATUS to see if the process is not stopped. If not, then we
2204 use PIOCWSTOP. But during the window between the two, if the process
2205 stops for any reason that is not an event of interest (such as a job
2206 control signal) then gdb will hang. One possible workaround is to set
2207 an alarm to wake up every minute of so and check to see if the process
2208 is still running, and if so, then reissue the PIOCWSTOP. But this is
2209 a real kludge, so has not been implemented. FIXME: investigate
2210 alternatives.
2211
2212 FIXME: Investigate why wait() seems to have problems with programs
2213 being control by /proc routines.
2214
2215 */
2216
3fbdd536 2217static int
de43d7d0
SG		 2218procfs_wait (pid, statloc)
2219 int pid;
67ac9759 2220 struct target_waitstatus *ourstatus;
35f5886e
FF		 2221{
2222 short what;
2223 short why;
2224 int statval = 0;
2225 int checkerr = 0;
2226 int rtnval = -1;
de43d7d0
SG		 2227 struct procinfo *pi;
2228
2229 if (pid != -1) /* Non-specific process? */
2230 pi = NULL;
2231 else
2232 for (pi = procinfo_list; pi; pi = pi->next)
2233 if (pi->had_event)
2234 break;
2235
2236wait_again:
2237
2238 if (!pi)
7c5d526e 2239 pi = wait_fd ();
de43d7d0
SG		 2240
2241 if (pid != -1)
2242 for (pi = procinfo_list; pi; pi = pi->next)
2243 if (pi->pid == pid && pi->had_event)
2244 break;
2245
2246 if (!pi && !checkerr)
2247 goto wait_again;
2248
2249 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2250 {
2251 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
2252 {
2253 checkerr++;
2254 }
35f5886e
FF		 2255 }
2256 if (checkerr)
2257 {
2258 if (errno == ENOENT)
2259 {
2260 rtnval = wait (&statval);
2261 if (rtnval != inferior_pid)
2262 {
de43d7d0 2263 print_sys_errmsg (pi->pathname, errno);
35f5886e
FF		 2264 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
2265 /* NOTREACHED */
2266 }
2267 }
2268 else
2269 {
de43d7d0 2270 print_sys_errmsg (pi->pathname, errno);
35f5886e
FF		 2271 error ("PIOCSTATUS or PIOCWSTOP failed.");
2272 /* NOTREACHED */
2273 }
2274 }
de43d7d0 2275 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
35f5886e 2276 {
de43d7d0
SG		 2277 rtnval = pi->prstatus.pr_pid;
2278 why = pi->prstatus.pr_why;
2279 what = pi->prstatus.pr_what;
2280
2281 switch (why)
35f5886e 2282 {
de43d7d0 2283 case PR_SIGNALLED:
35f5886e 2284 statval = (what << 8) | 0177;
fb63d460
SG		 2285 break;
2286 case PR_SYSENTRY:
2287 if (what != SYS_exit)
2288 error ("PR_SYSENTRY, unknown system call %d", what);
2289
2290 pi->prrun.pr_flags = PRCFAULT;
2291
2292 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2293 perror_with_name (pi->pathname);
2294
2295 rtnval = wait (&statval);
2296
de43d7d0
SG		 2297 break;
2298 case PR_SYSEXIT:
2299 switch (what)
2300 {
407a8389 2301#ifdef SYS_exec
de43d7d0 2302 case SYS_exec:
407a8389
SG		 2303#endif
2304#ifdef SYS_execve
de43d7d0 2305 case SYS_execve:
407a8389
SG		 2306#endif
2307#ifdef SYS_execv
de43d7d0 2308 case SYS_execv:
407a8389 2309#endif
de43d7d0
SG		 2310 statval = (SIGTRAP << 8) | 0177;
2311 break;
2312#ifdef SYS_sproc
2313 case SYS_sproc:
2314/* We've just detected the completion of an sproc system call. Now we need to
2315 setup a procinfo struct for this thread, and notify the thread system of the
2316 new arrival. */
2317
2318/* If sproc failed, then nothing interesting happened. Continue the process and
2319 go back to sleep. */
2320
2321 if (pi->prstatus.pr_errno != 0)
2322 {
2323 pi->prrun.pr_flags &= PRSTEP;
2324 pi->prrun.pr_flags |= PRCFAULT;
2325
2326 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2327 perror_with_name (pi->pathname);
2328
2329 goto wait_again;
2330 }
2331
2332/* At this point, the new thread is stopped at it's first instruction, and
2333 the parent is stopped at the exit from sproc. */
2334
2335/* Notify the caller of the arrival of a new thread. */
2336 create_procinfo (pi->prstatus.pr_rval1);
2337
2338 rtnval = pi->prstatus.pr_rval1;
2339 statval = (SIGTRAP << 8) | 0177;
2340
2341 break;
2342#endif /* SYS_sproc */
2343
2344 default:
2345 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
2346 }
2347 break;
2348 case PR_REQUESTED:
35f5886e 2349 statval = (SIGSTOP << 8) | 0177;
de43d7d0
SG		 2350 break;
2351 case PR_JOBCONTROL:
35f5886e 2352 statval = (what << 8) | 0177;
de43d7d0
SG		 2353 break;
2354 case PR_FAULTED:
35f5886e
FF		 2355 switch (what)
2356 {
2357 case FLTPRIV:
2358 case FLTILL:
2359 statval = (SIGILL << 8) | 0177;
2360 break;
2361 case FLTBPT:
2362 case FLTTRACE:
2363 statval = (SIGTRAP << 8) | 0177;
2364 break;
2365 case FLTSTACK:
2366 case FLTACCESS:
2367 case FLTBOUNDS:
2368 statval = (SIGSEGV << 8) | 0177;
2369 break;
2370 case FLTIOVF:
2371 case FLTIZDIV:
2372 case FLTFPE:
2373 statval = (SIGFPE << 8) | 0177;
2374 break;
2375 case FLTPAGE: /* Recoverable page fault */
2376 default:
35f5886e 2377 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
35f5886e 2378 }
de43d7d0
SG		 2379 break;
2380 default:
35f5886e 2381 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
35f5886e 2382 }
de43d7d0
SG		 2383/* Stop all the other threads when any of them stops. */
2384
2385 {
2386 struct procinfo *procinfo;
2387
2388 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2389 {
2390 if (!procinfo->had_event)
2391 if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
2392 {
2393 print_sys_errmsg (procinfo->pathname, errno);
2394 error ("PIOCSTOP failed");
2395 }
2396 }
2397 }
35f5886e
FF		 2398 }
2399 else
2400 {
2401 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
de43d7d0 2402 pi->prstatus.pr_flags);
35f5886e 2403 }
3fbdd536 2404
67ac9759 2405 store_waitstatus (ourstatus, statval);
3fbdd536
JG		 2406
2407 if (rtnval == -1) /* No more children to wait for */
2408 {
199b2450 2409 fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
67ac9759
JK		 2410 /* Claim it exited with unknown signal. */
2411 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2412 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
3fbdd536
JG		 2413 return rtnval;
2414 }
2415
de43d7d0 2416 pi->had_event = 0; /* Indicate that we've seen this one */
35f5886e
FF		 2417 return (rtnval);
2418}
2419
2420/*
2421
6b801388
FF		 2422LOCAL FUNCTION
2423
2424 set_proc_siginfo - set a process's current signal info
2425
2426SYNOPSIS
2427
2428 void set_proc_siginfo (struct procinfo *pip, int signo);
2429
2430DESCRIPTION
2431
2432 Given a pointer to a process info struct in PIP and a signal number
2433 in SIGNO, set the process's current signal and its associated signal
2434 information. The signal will be delivered to the process immediately
2435 after execution is resumed, even if it is being held. In addition,
2436 this particular delivery will not cause another PR_SIGNALLED stop
2437 even if the signal is being traced.
2438
2439 If we are not delivering the same signal that the prstatus siginfo
2440 struct contains information about, then synthesize a siginfo struct
2441 to match the signal we are doing to deliver, make it of the type
2442 "generated by a user process", and send this synthesized copy. When
2443 used to set the inferior's signal state, this will be required if we
2444 are not currently stopped because of a traced signal, or if we decide
2445 to continue with a different signal.
2446
2447 Note that when continuing the inferior from a stop due to receipt
2448 of a traced signal, we either have set PRCSIG to clear the existing
2449 signal, or we have to call this function to do a PIOCSSIG with either
2450 the existing siginfo struct from pr_info, or one we have synthesized
2451 appropriately for the signal we want to deliver. Otherwise if the
2452 signal is still being traced, the inferior will immediately stop
2453 again.
2454
2455 See siginfo(5) for more details.
2456*/
2457
2458static void
2459set_proc_siginfo (pip, signo)
cc221e76
FF		 2460 struct procinfo *pip;
2461 int signo;
6b801388
FF		 2462{
2463 struct siginfo newsiginfo;
2464 struct siginfo *sip;
2465
de43d7d0 2466 if (signo == pip -> prstatus.pr_info.si_signo)
6b801388 2467 {
de43d7d0
SG		 2468 sip = &pip -> prstatus.pr_info;
2469 }
2470 else
2471 {
2472 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2473 sip = &newsiginfo;
2474 sip -> si_signo = signo;
2475 sip -> si_code = 0;
2476 sip -> si_errno = 0;
2477 sip -> si_pid = getpid ();
2478 sip -> si_uid = getuid ();
2479 }
2480 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2481 {
2482 print_sys_errmsg (pip -> pathname, errno);
2483 warning ("PIOCSSIG failed");
6b801388
FF		 2484 }
2485}
2486
25286543 2487/* Resume execution of process PID. If STEP is nozero, then
59ba57da
JK		 2488 just single step it. If SIGNAL is nonzero, restart it with that
2489 signal activated. */
35f5886e 2490
3fbdd536 2491static void
25286543
SG		 2492procfs_resume (pid, step, signo)
2493 int pid;
1ab3bf1b 2494 int step;
67ac9759 2495 enum target_signal signo;
35f5886e 2496{
59ba57da 2497 int signal_to_pass;
de43d7d0
SG		 2498 struct procinfo *pi, *procinfo;
2499
2500 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
59ba57da 2501
35f5886e 2502 errno = 0;
de43d7d0 2503 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
99fd9e3e 2504
59ba57da
JK		 2505#if 0
2506 /* It should not be necessary. If the user explicitly changes the value,
2507 value_assign calls write_register_bytes, which writes it. */
2508/* It may not be absolutely necessary to specify the PC value for
2509 restarting, but to be safe we use the value that gdb considers
2510 to be current. One case where this might be necessary is if the
2511 user explicitly changes the PC value that gdb considers to be
2512 current. FIXME: Investigate if this is necessary or not. */
2513
c3192172 2514#ifdef PRSVADDR_BROKEN
99fd9e3e
SG		 2515/* Can't do this under Solaris running on a Sparc, as there seems to be no
2516 place to put nPC. In fact, if you use this, nPC seems to be set to some
2517 random garbage. We have to rely on the fact that PC and nPC have been
2518 written previously via PIOCSREG during a register flush. */
2519
de43d7d0
SG		 2520 pi->prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
2521 pi->prrun.pr_flags != PRSVADDR;
99fd9e3e 2522#endif
59ba57da
JK		 2523#endif
2524
67ac9759 2525 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
59ba57da
JK		 2526 /* When attaching to a child process, if we forced it to stop with
2527 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2528 Upon resuming the first time after such a stop, we explicitly
2529 inhibit sending it another SIGSTOP, which would be the normal
2530 result of default signal handling. One potential drawback to
2531 this is that we will also ignore any attempt to by the user
2532 to explicitly continue after the attach with a SIGSTOP. Ultimately
2533 this problem should be dealt with by making the routines that
2534 deal with the inferior a little smarter, and possibly even allow
2535 an inferior to continue running at the same time as gdb. (FIXME?) */
2536 signal_to_pass = 0;
67ac9759 2537 else if (signo == TARGET_SIGNAL_TSTP
de43d7d0
SG		 2538 && pi->prstatus.pr_cursig == SIGTSTP
2539 && pi->prstatus.pr_action.sa_handler == SIG_DFL)
59ba57da
JK		 2540
2541 /* We are about to pass the inferior a SIGTSTP whose action is
2542 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2543 (notifying the parent via wait()), and then keep going from the
2544 same place when the parent is ready for you to keep going. So
2545 under the debugger, it should do nothing (as if the program had
2546 been stopped and then later resumed. Under ptrace, this
2547 happens for us, but under /proc, the system obligingly stops
2548 the process, and wait_for_inferior would have no way of
2549 distinguishing that type of stop (which indicates that we
2550 should just start it again), with a stop due to the pr_trace
2551 field of the prrun_t struct.
2552
2553 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2554 because the handler needs to get executed. */
2555 signal_to_pass = 0;
2556 else
67ac9759 2557 signal_to_pass = target_signal_to_host (signo);
99fd9e3e 2558
59ba57da 2559 if (signal_to_pass)
35f5886e 2560 {
de43d7d0 2561 set_proc_siginfo (pi, signal_to_pass);
35f5886e
FF		 2562 }
2563 else
2564 {
de43d7d0 2565 pi->prrun.pr_flags |= PRCSIG;
35f5886e 2566 }
de43d7d0 2567 pi->nopass_next_sigstop = 0;
35f5886e
FF		 2568 if (step)
2569 {
de43d7d0 2570 pi->prrun.pr_flags |= PRSTEP;
35f5886e 2571 }
de43d7d0 2572 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
35f5886e 2573 {
de43d7d0 2574 perror_with_name (pi->pathname);
35f5886e
FF		 2575 /* NOTREACHED */
2576 }
de43d7d0
SG		 2577
2578 pi->had_event = 0;
2579
2580 /* Continue all the other threads that haven't had an event of
2581 interest. */
2582
2583 if (pid == -1)
2584 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2585 {
2586 if (pi != procinfo && !procinfo->had_event)
2587 {
2588 procinfo->prrun.pr_flags &= PRSTEP;
2589 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
2590 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2591 if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
2592 {
2593 if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
2594 {
199b2450 2595 fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
de43d7d0
SG		 2596 }
2597 print_sys_errmsg (procinfo->pathname, errno);
2598 error ("PIOCRUN failed");
2599 }
2600 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2601 }
2602 }
35f5886e
FF		 2603}
2604
2605/*
2606
3fbdd536 2607LOCAL FUNCTION
35f5886e 2608
3fbdd536 2609 procfs_fetch_registers -- fetch current registers from inferior
35f5886e
FF		 2610
2611SYNOPSIS
2612
3fbdd536 2613 void procfs_fetch_registers (int regno)
35f5886e
FF		 2614
2615DESCRIPTION
2616
2617 Read the current values of the inferior's registers, both the
2618 general register set and floating point registers (if supported)
2619 and update gdb's idea of their current values.
2620
2621*/
2622
3fbdd536
JG		 2623static void
2624procfs_fetch_registers (regno)
1ab3bf1b 2625 int regno;
35f5886e 2626{
de43d7d0
SG		 2627 struct procinfo *pi;
2628
2629 pi = current_procinfo;
2630
2631 if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
35f5886e 2632 {
de43d7d0 2633 supply_gregset (&pi->gregset);
35f5886e
FF		 2634 }
2635#if defined (FP0_REGNUM)
de43d7d0 2636 if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
35f5886e 2637 {
de43d7d0 2638 supply_fpregset (&pi->fpregset);
35f5886e
FF		 2639 }
2640#endif
2641}
2642
fb182850
FF		 2643/*
2644
35f5886e
FF		 2645LOCAL FUNCTION
2646
de43d7d0
SG		 2647 proc_init_failed - called whenever /proc access initialization
2648fails
35f5886e
FF		 2649
2650SYNOPSIS
2651
de43d7d0 2652 static void proc_init_failed (struct procinfo *pi, char *why)
35f5886e
FF		 2653
2654DESCRIPTION
2655
2656 This function is called whenever initialization of access to a /proc
2657 entry fails. It prints a suitable error message, does some cleanup,
2658 and then invokes the standard error processing routine which dumps
2659 us back into the command loop.
2660 */
2661
2662static void
de43d7d0
SG		 2663proc_init_failed (pi, why)
2664 struct procinfo *pi;
1ab3bf1b 2665 char *why;
35f5886e 2666{
de43d7d0
SG		 2667 print_sys_errmsg (pi->pathname, errno);
2668 kill (pi->pid, SIGKILL);
2669 close_proc_file (pi);
35f5886e
FF		 2670 error (why);
2671 /* NOTREACHED */
2672}
2673
2674/*
2675
2676LOCAL FUNCTION
2677
2678 close_proc_file - close any currently open /proc entry
2679
2680SYNOPSIS
2681
a39ad5ce 2682 static void close_proc_file (struct procinfo *pip)
35f5886e
FF		 2683
2684DESCRIPTION
2685
2686 Close any currently open /proc entry and mark the process information
2687 entry as invalid. In order to ensure that we don't try to reuse any
2688 stale information, the pid, fd, and pathnames are explicitly
2689 invalidated, which may be overkill.
2690
2691 */
2692
2693static void
1ab3bf1b
JG		 2694close_proc_file (pip)
2695 struct procinfo *pip;
35f5886e 2696{
de43d7d0
SG		 2697 struct procinfo *procinfo;
2698
2699 remove_fd (pip); /* Remove fd from poll/select list */
2700
2701 close (pip -> fd);
2702
2703 free (pip -> pathname);
2704
2705 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2706
2707 if (procinfo_list == pip)
2708 procinfo_list = pip->next;
2709 else
2710 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2711 if (procinfo->next == pip)
2712 procinfo->next = pip->next;
2713
2714 free (pip);
35f5886e
FF		 2715}
2716
2717/*
2718
2719LOCAL FUNCTION
2720
2721 open_proc_file - open a /proc entry for a given process id
2722
2723SYNOPSIS
2724
ec8ceca3 2725 static int open_proc_file (int pid, struct procinfo *pip, int mode)
35f5886e
FF		 2726
2727DESCRIPTION
2728
ec8ceca3
JG		 2729 Given a process id and a mode, close the existing open /proc
2730 entry (if any) and open one for the new process id, in the
2731 specified mode. Once it is open, then mark the local process
2732 information structure as valid, which guarantees that the pid,
2733 fd, and pathname fields match an open /proc entry. Returns
2734 zero if the open fails, nonzero otherwise.
35f5886e
FF		 2735
2736 Note that the pathname is left intact, even when the open fails,
2737 so that callers can use it to construct meaningful error messages
2738 rather than just "file open failed".
2739 */
2740
2741static int
ec8ceca3 2742open_proc_file (pid, pip, mode)
1ab3bf1b
JG		 2743 int pid;
2744 struct procinfo *pip;
ec8ceca3 2745 int mode;
35f5886e 2746{
de43d7d0
SG		 2747 pip -> next = NULL;
2748 pip -> had_event = 0;
2749 pip -> pathname = xmalloc (32);
2750 pip -> pid = pid;
2751
a39ad5ce 2752 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
de43d7d0
SG		 2753 if ((pip -> fd = open (pip -> pathname, mode)) < 0)
2754 return 0;
2755
2756 return 1;
a39ad5ce
FF		 2757}
2758
f66f459f 2759static char *
1ab3bf1b
JG		 2760mappingflags (flags)
2761 long flags;
a39ad5ce 2762{
5c1c5e67 2763 static char asciiflags[8];
a39ad5ce 2764
5c1c5e67
FF		 2765 strcpy (asciiflags, "-------");
2766#if defined (MA_PHYS)
2767 if (flags & MA_PHYS) asciiflags[0] = 'd';
2768#endif
2769 if (flags & MA_STACK) asciiflags[1] = 's';
2770 if (flags & MA_BREAK) asciiflags[2] = 'b';
2771 if (flags & MA_SHARED) asciiflags[3] = 's';
2772 if (flags & MA_READ) asciiflags[4] = 'r';
2773 if (flags & MA_WRITE) asciiflags[5] = 'w';
2774 if (flags & MA_EXEC) asciiflags[6] = 'x';
a39ad5ce
FF		 2775 return (asciiflags);
2776}
2777
2778static void
cc221e76
FF		 2779info_proc_flags (pip, summary)
2780 struct procinfo *pip;
2781 int summary;
2782{
2783 struct trans *transp;
2784
2785 printf_filtered ("%-32s", "Process status flags:");
2786 if (!summary)
2787 {
2788 printf_filtered ("\n\n");
2789 }
2790 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2791 {
2792 if (pip -> prstatus.pr_flags & transp -> value)
2793 {
2794 if (summary)
2795 {
2796 printf_filtered ("%s ", transp -> name);
2797 }
2798 else
2799 {
2800 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2801 }
2802 }
2803 }
2804 printf_filtered ("\n");
2805}
2806
2807static void
2808info_proc_stop (pip, summary)
2809 struct procinfo *pip;
2810 int summary;
2811{
2812 struct trans *transp;
2813 int why;
2814 int what;
2815
2816 why = pip -> prstatus.pr_why;
2817 what = pip -> prstatus.pr_what;
2818
2819 if (pip -> prstatus.pr_flags & PR_STOPPED)
2820 {
2821 printf_filtered ("%-32s", "Reason for stopping:");
2822 if (!summary)
2823 {
2824 printf_filtered ("\n\n");
2825 }
2826 for (transp = pr_why_table; transp -> name != NULL; transp++)
2827 {
2828 if (why == transp -> value)
2829 {
2830 if (summary)
2831 {
2832 printf_filtered ("%s ", transp -> name);
2833 }
2834 else
2835 {
2836 printf_filtered ("\t%-16s %s.\n",
2837 transp -> name, transp -> desc);
2838 }
2839 break;
2840 }
2841 }
2842
2843 /* Use the pr_why field to determine what the pr_what field means, and
2844 print more information. */
2845
2846 switch (why)
2847 {
2848 case PR_REQUESTED:
2849 /* pr_what is unused for this case */
2850 break;
2851 case PR_JOBCONTROL:
2852 case PR_SIGNALLED:
2853 if (summary)
2854 {
2855 printf_filtered ("%s ", signalname (what));
2856 }
2857 else
2858 {
2859 printf_filtered ("\t%-16s %s.\n", signalname (what),
4ace50a5 2860 safe_strsignal (what));
cc221e76
FF		 2861 }
2862 break;
2863 case PR_SYSENTRY:
2864 if (summary)
2865 {
2866 printf_filtered ("%s ", syscallname (what));
2867 }
2868 else
2869 {
2870 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2871 "Entered this system call");
2872 }
2873 break;
2874 case PR_SYSEXIT:
2875 if (summary)
2876 {
2877 printf_filtered ("%s ", syscallname (what));
2878 }
2879 else
2880 {
2881 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2882 "Returned from this system call");
2883 }
2884 break;
2885 case PR_FAULTED:
2886 if (summary)
2887 {
2888 printf_filtered ("%s ",
2889 lookupname (faults_table, what, "fault"));
2890 }
2891 else
2892 {
2893 printf_filtered ("\t%-16s %s.\n",
2894 lookupname (faults_table, what, "fault"),
2895 lookupdesc (faults_table, what));
2896 }
2897 break;
2898 }
2899 printf_filtered ("\n");
2900 }
2901}
2902
2903static void
2904info_proc_siginfo (pip, summary)
2905 struct procinfo *pip;
2906 int summary;
2907{
2908 struct siginfo *sip;
2909
2910 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2911 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2912 pip -> prstatus.pr_why == PR_FAULTED))
2913 {
2914 printf_filtered ("%-32s", "Additional signal/fault info:");
2915 sip = &pip -> prstatus.pr_info;
2916 if (summary)
2917 {
2918 printf_filtered ("%s ", signalname (sip -> si_signo));
2919 if (sip -> si_errno > 0)
2920 {
4ace50a5 2921 printf_filtered ("%s ", errnoname (sip -> si_errno));
cc221e76
FF		 2922 }
2923 if (sip -> si_code <= 0)
2924 {
25286543
SG		 2925 printf_filtered ("sent by %s, uid %d ",
2926 target_pid_to_str (sip -> si_pid),
cc221e76
FF		 2927 sip -> si_uid);
2928 }
2929 else
2930 {
2931 printf_filtered ("%s ", sigcodename (sip));
2932 if ((sip -> si_signo == SIGILL) ||
2933 (sip -> si_signo == SIGFPE) ||
2934 (sip -> si_signo == SIGSEGV) ||
2935 (sip -> si_signo == SIGBUS))
2936 {
2937 printf_filtered ("addr=%#x ", sip -> si_addr);
2938 }
2939 else if ((sip -> si_signo == SIGCHLD))
2940 {
25286543
SG		 2941 printf_filtered ("child %s, status %u ",
2942 target_pid_to_str (sip -> si_pid),
cc221e76
FF		 2943 sip -> si_status);
2944 }
2945 else if ((sip -> si_signo == SIGPOLL))
2946 {
2947 printf_filtered ("band %u ", sip -> si_band);
2948 }
2949 }
2950 }
2951 else
2952 {
2953 printf_filtered ("\n\n");
2954 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
4ace50a5 2955 safe_strsignal (sip -> si_signo));
cc221e76
FF		 2956 if (sip -> si_errno > 0)
2957 {
2958 printf_filtered ("\t%-16s %s.\n",
4ace50a5
FF		 2959 errnoname (sip -> si_errno),
2960 safe_strerror (sip -> si_errno));
cc221e76
FF		 2961 }
2962 if (sip -> si_code <= 0)
2963 {
25286543 2964 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
cc221e76
FF		 2965 "PID of process sending signal");
2966 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2967 "UID of process sending signal");
2968 }
2969 else
2970 {
2971 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2972 sigcodedesc (sip));
2973 if ((sip -> si_signo == SIGILL) ||
2974 (sip -> si_signo == SIGFPE))
2975 {
2976 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2977 "Address of faulting instruction");
2978 }
2979 else if ((sip -> si_signo == SIGSEGV) ||
2980 (sip -> si_signo == SIGBUS))
2981 {
2982 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2983 "Address of faulting memory reference");
2984 }
2985 else if ((sip -> si_signo == SIGCHLD))
2986 {
25286543 2987 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
cc221e76
FF		 2988 "Child process ID");
2989 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2990 "Child process exit value or signal");
2991 }
2992 else if ((sip -> si_signo == SIGPOLL))
2993 {
2994 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2995 "Band event for POLL_{IN,OUT,MSG}");
2996 }
2997 }
2998 }
2999 printf_filtered ("\n");
3000 }
3001}
3002
3003static void
3004info_proc_syscalls (pip, summary)
3005 struct procinfo *pip;
3006 int summary;
3007{
3008 int syscallnum;
3009
3010 if (!summary)
3011 {
3012
3013#if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
3014 if (pip -> prstatus.pr_flags & PR_ASLEEP)
3015 {
3016 int syscallnum = pip -> prstatus.pr_reg[R_D0];
3017 if (summary)
3018 {
3019 printf_filtered ("%-32s", "Sleeping in system call:");
3020 printf_filtered ("%s", syscallname (syscallnum));
3021 }
3022 else
3023 {
3024 printf_filtered ("Sleeping in system call '%s'.\n",
3025 syscallname (syscallnum));
3026 }
3027 }
3028#endif
3029
3030 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
3031 {
3032 print_sys_errmsg (pip -> pathname, errno);
3033 error ("PIOCGENTRY failed");
3034 }
3035
3036 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
3037 {
3038 print_sys_errmsg (pip -> pathname, errno);
3039 error ("PIOCGEXIT failed");
3040 }
3041
3042 printf_filtered ("System call tracing information:\n\n");
3043
3044 printf_filtered ("\t%-12s %-8s %-8s\n",
3045 "System call",
3046 "Entry",
3047 "Exit");
3048 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
3049 {
3050 QUIT;
3051 if (syscall_table[syscallnum] != NULL)
3052 {
3053 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
3054 printf_filtered ("%-8s ",
3055 prismember (&pip -> entryset, syscallnum)
3056 ? "on" : "off");
3057 printf_filtered ("%-8s ",
3058 prismember (&pip -> exitset, syscallnum)
3059 ? "on" : "off");
3060 printf_filtered ("\n");
3061 }
3062 }
3063 printf_filtered ("\n");
3064 }
3065}
3066
3067static char *
3068signalname (signo)
3069 int signo;
3070{
4ace50a5
FF		 3071 char *name;
3072 static char locbuf[32];
3073
3074 name = strsigno (signo);
3075 if (name == NULL)
3076 {
3077 sprintf (locbuf, "Signal %d", signo);
3078 }
3079 else
3080 {
3081 sprintf (locbuf, "%s (%d)", name, signo);
3082 }
3083 return (locbuf);
3084}
3085
3086static char *
3087errnoname (errnum)
3088 int errnum;
3089{
3090 char *name;
cc221e76
FF		 3091 static char locbuf[32];
3092
4ace50a5
FF		 3093 name = strerrno (errnum);
3094 if (name == NULL)
cc221e76 3095 {
4ace50a5 3096 sprintf (locbuf, "Errno %d", errnum);
cc221e76
FF		 3097 }
3098 else
3099 {
4ace50a5 3100 sprintf (locbuf, "%s (%d)", name, errnum);
cc221e76
FF		 3101 }
3102 return (locbuf);
3103}
3104
3105static void
3106info_proc_signals (pip, summary)
3107 struct procinfo *pip;
3108 int summary;
3109{
3110 int signo;
3111
3112 if (!summary)
3113 {
3114 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
3115 {
3116 print_sys_errmsg (pip -> pathname, errno);
3117 error ("PIOCGTRACE failed");
3118 }
3119
3120 printf_filtered ("Disposition of signals:\n\n");
3121 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3122 "Signal", "Trace", "Hold", "Pending", "Description");
3123 for (signo = 0; signo < NSIG; signo++)
3124 {
3125 QUIT;
3126 printf_filtered ("\t%-15s ", signalname (signo));
3127 printf_filtered ("%-8s ",
3128 prismember (&pip -> trace, signo)
3129 ? "on" : "off");
3130 printf_filtered ("%-8s ",
3131 prismember (&pip -> prstatus.pr_sighold, signo)
3132 ? "on" : "off");
3133 printf_filtered ("%-8s ",
3134 prismember (&pip -> prstatus.pr_sigpend, signo)
3135 ? "yes" : "no");
4ace50a5 3136 printf_filtered (" %s\n", safe_strsignal (signo));
cc221e76
FF		 3137 }
3138 printf_filtered ("\n");
3139 }
3140}
3141
3142static void
3143info_proc_faults (pip, summary)
3144 struct procinfo *pip;
3145 int summary;
3146{
3147 struct trans *transp;
3148
3149 if (!summary)
3150 {
3151 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
3152 {
3153 print_sys_errmsg (pip -> pathname, errno);
3154 error ("PIOCGFAULT failed");
3155 }
3156
3157 printf_filtered ("Current traced hardware fault set:\n\n");
3158 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3159
3160 for (transp = faults_table; transp -> name != NULL; transp++)
3161 {
3162 QUIT;
3163 printf_filtered ("\t%-12s ", transp -> name);
3164 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
3165 ? "on" : "off");
3166 printf_filtered ("\n");
3167 }
3168 printf_filtered ("\n");
3169 }
3170}
3171
3172static void
3173info_proc_mappings (pip, summary)
1ab3bf1b 3174 struct procinfo *pip;
cc221e76 3175 int summary;
a39ad5ce
FF		 3176{
3177 int nmap;
3178 struct prmap *prmaps;
3179 struct prmap *prmap;
3180
cc221e76 3181 if (!summary)
a39ad5ce 3182 {
cc221e76 3183 printf_filtered ("Mapped address spaces:\n\n");
5c1c5e67 3184 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
cc221e76
FF		 3185 "Start Addr",
3186 " End Addr",
3187 " Size",
3188 " Offset",
3189 "Flags");
3190 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
a39ad5ce 3191 {
cc221e76
FF		 3192 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3193 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
a39ad5ce 3194 {
cc221e76
FF		 3195 for (prmap = prmaps; prmap -> pr_size; ++prmap)
3196 {
5c1c5e67 3197 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
cc221e76
FF		 3198 prmap -> pr_vaddr,
3199 prmap -> pr_vaddr + prmap -> pr_size - 1,
3200 prmap -> pr_size,
3201 prmap -> pr_off,
3202 mappingflags (prmap -> pr_mflags));
3203 }
a39ad5ce
FF		 3204 }
3205 }
cc221e76 3206 printf_filtered ("\n");
a39ad5ce 3207 }
a39ad5ce
FF		 3208}
3209
3210/*
3211
3212LOCAL FUNCTION
3213
cc221e76 3214 info_proc -- implement the "info proc" command
a39ad5ce
FF		 3215
3216SYNOPSIS
3217
cc221e76 3218 void info_proc (char *args, int from_tty)
a39ad5ce
FF		 3219
3220DESCRIPTION
3221
3222 Implement gdb's "info proc" command by using the /proc interface
3223 to print status information about any currently running process.
3224
3225 Examples of the use of "info proc" are:
3226
cc221e76
FF		 3227 info proc (prints summary info for current inferior)
3228 info proc 123 (prints summary info for process with pid 123)
3229 info proc mappings (prints address mappings)
3230 info proc times (prints process/children times)
3231 info proc id (prints pid, ppid, gid, sid, etc)
3fbdd536 3232 FIXME: i proc id not implemented.
cc221e76 3233 info proc status (prints general process state info)
3fbdd536 3234 FIXME: i proc status not implemented.
cc221e76
FF		 3235 info proc signals (prints info about signal handling)
3236 info proc all (prints all info)
a39ad5ce
FF		 3237
3238 */
3239
3240static void
cc221e76 3241info_proc (args, from_tty)
1ab3bf1b
JG		 3242 char *args;
3243 int from_tty;
a39ad5ce 3244{
a39ad5ce 3245 int pid;
a39ad5ce
FF		 3246 struct procinfo *pip;
3247 struct cleanup *old_chain;
cc221e76
FF		 3248 char **argv;
3249 int argsize;
3250 int summary = 1;
3251 int flags = 0;
3252 int syscalls = 0;
3253 int signals = 0;
3254 int faults = 0;
3255 int mappings = 0;
3256 int times = 0;
3257 int id = 0;
3258 int status = 0;
3259 int all = 0;
a39ad5ce
FF		 3260
3261 old_chain = make_cleanup (null_cleanup, 0);
3262
de43d7d0
SG		 3263 /* Default to using the current inferior if no pid specified. Note
3264 that inferior_pid may be 0, hence we set okerr. */
a39ad5ce 3265
de43d7d0 3266 pip = find_procinfo (inferior_pid, 1);
a39ad5ce 3267
a39ad5ce 3268 if (args != NULL)
35f5886e 3269 {
cc221e76 3270 if ((argv = buildargv (args)) == NULL)
a39ad5ce 3271 {
cc221e76
FF		 3272 nomem (0);
3273 }
3274 make_cleanup (freeargv, (char *) argv);
3275
3276 while (*argv != NULL)
3277 {
3278 argsize = strlen (*argv);
3279 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
3280 {
3281 summary = 0;
3282 all = 1;
3283 }
3284 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
3285 {
3286 summary = 0;
3287 faults = 1;
3288 }
3289 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
3290 {
3291 summary = 0;
3292 flags = 1;
3293 }
3294 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
3295 {
3296 summary = 0;
3297 id = 1;
3298 }
3299 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
3300 {
3301 summary = 0;
3302 mappings = 1;
3303 }
3304 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
3305 {
3306 summary = 0;
3307 signals = 1;
3308 }
3309 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
3310 {
3311 summary = 0;
3312 status = 1;
3313 }
3314 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
3315 {
3316 summary = 0;
3317 syscalls = 1;
3318 }
3319 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
a39ad5ce 3320 {
cc221e76
FF		 3321 summary = 0;
3322 times = 1;
a39ad5ce 3323 }
de43d7d0 3324 else if ((pid = atoi (*argv)) > 0)
a39ad5ce 3325 {
de43d7d0
SG		 3326 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
3327 memset (pip, 0, sizeof (*pip));
3328
3329 pip->pid = pid;
ec8ceca3 3330 if (!open_proc_file (pid, pip, O_RDONLY))
a39ad5ce
FF		 3331 {
3332 perror_with_name (pip -> pathname);
3333 /* NOTREACHED */
3334 }
3335 make_cleanup (close_proc_file, pip);
3336 }
cc221e76
FF		 3337 else if (**argv != '\000')
3338 {
3339 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
3340 }
3341 argv++;
a39ad5ce 3342 }
35f5886e 3343 }
a39ad5ce
FF		 3344
3345 /* If we don't have a valid open process at this point, then we have no
3346 inferior or didn't specify a specific pid. */
3347
de43d7d0 3348 if (!pip)
35f5886e 3349 {
6fe90fc8
JK		 3350 error ("\
3351No process. Start debugging a program or specify an explicit process ID.");
35f5886e 3352 }
a39ad5ce 3353 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
35f5886e 3354 {
a39ad5ce
FF		 3355 print_sys_errmsg (pip -> pathname, errno);
3356 error ("PIOCSTATUS failed");
35f5886e 3357 }
a39ad5ce 3358
cc221e76
FF		 3359 /* Print verbose information of the requested type(s), or just a summary
3360 of the information for all types. */
3361
3362 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
3363 if (summary || all || flags)
3364 {
3365 info_proc_flags (pip, summary);
3366 }
3367 if (summary || all)
3368 {
3369 info_proc_stop (pip, summary);
3370 }
3371 if (summary || all || signals || faults)
3372 {
3373 info_proc_siginfo (pip, summary);
3374 }
3375 if (summary || all || syscalls)
3376 {
3377 info_proc_syscalls (pip, summary);
3378 }
3379 if (summary || all || mappings)
3380 {
3381 info_proc_mappings (pip, summary);
3382 }
3383 if (summary || all || signals)
3384 {
3385 info_proc_signals (pip, summary);
3386 }
3387 if (summary || all || faults)
3388 {
3389 info_proc_faults (pip, summary);
3390 }
3391 printf_filtered ("\n");
a39ad5ce
FF		 3392
3393 /* All done, deal with closing any temporary process info structure,
3394 freeing temporary memory , etc. */
3395
3396 do_cleanups (old_chain);
3397}
3398
de43d7d0
SG		 3399/*
3400
3401LOCAL FUNCTION
3402
3403 procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
3404
3405SYNOPSIS
3406
3407 void procfs_set_sproc_trap (void)
3408
3409DESCRIPTION
3410
3411 This function sets up a trap on sproc system call exits so that we can
3412 detect the arrival of a new thread. We are called with the child
3413 stopped prior to it's first instruction.
3414
3415 Also note that we turn on the inherit-on-fork flag in the child process
3416 so that any grand-children start with all tracing flags set.
3417 */
3418
952a820e
SG		 3419#ifdef SYS_sproc
3420
de43d7d0
SG		 3421static void
3422procfs_set_sproc_trap (pi)
3423 struct procinfo *pi;
3424{
3425 sysset_t exitset;
3426
3427 if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
3428 {
3429 print_sys_errmsg (pi->pathname, errno);
3430 error ("PIOCGEXIT failed");
3431 }
3432
de43d7d0 3433 praddset (&exitset, SYS_sproc);
de43d7d0
SG		 3434
3435 if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
3436 {
3437 print_sys_errmsg (pi->pathname, errno);
3438 error ("PIOCSEXIT failed");
3439 }
3440
3441 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3442 tracing flags set. */
3443
3444#ifdef PIOCSET /* New method */
3445 {
3446 long pr_flags;
3447 pr_flags = PR_FORK;
3448 ioctl (pi->fd, PIOCSET, &pr_flags);
3449 }
3450#else
3451#ifdef PIOCSFORK /* Original method */
3452 ioctl (pi->fd, PIOCSFORK, NULL);
3453#endif
3454#endif
3455}
952a820e 3456#endif /* SYS_sproc */
de43d7d0 3457
3fbdd536
JG		 3458/* Fork an inferior process, and start debugging it with /proc. */
3459
3460static void
3461procfs_create_inferior (exec_file, allargs, env)
3462 char *exec_file;
3463 char *allargs;
3464 char **env;
3465{
3466 fork_inferior (exec_file, allargs, env,
3467 proc_set_exec_trap, procfs_init_inferior);
3468 /* We are at the first instruction we care about. */
3469 /* Pedal to the metal... */
de43d7d0
SG		 3470
3471 /* Setup traps on exit from sproc() */
3472
952a820e
SG		 3473#ifdef SYS_sproc
3474 procfs_set_sproc_trap (current_procinfo);
3475#endif
de43d7d0 3476
67ac9759 3477 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
3fbdd536
JG		 3478}
3479
3480/* Clean up after the inferior dies. */
3481
3482static void
3483procfs_mourn_inferior ()
3484{
fb63d460
SG		 3485 struct procinfo *pi;
3486
3487 for (pi = procinfo_list; pi; pi = pi->next)
3488 unconditionally_kill_inferior (pi);
3489
3fbdd536
JG		 3490 unpush_target (&procfs_ops);
3491 generic_mourn_inferior ();
3492}
3493
3494/* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3495static int
3496procfs_can_run ()
3497{
3498 return(1);
3499}
3500\f
3501struct target_ops procfs_ops = {
3502 "procfs", /* to_shortname */
3503 "Unix /proc child process", /* to_longname */
3504 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3505 procfs_open, /* to_open */
3506 0, /* to_close */
3507 procfs_attach, /* to_attach */
3508 procfs_detach, /* to_detach */
3509 procfs_resume, /* to_resume */
3510 procfs_wait, /* to_wait */
3511 procfs_fetch_registers, /* to_fetch_registers */
3512 procfs_store_registers, /* to_store_registers */
3513 procfs_prepare_to_store, /* to_prepare_to_store */
3514 procfs_xfer_memory, /* to_xfer_memory */
3515 procfs_files_info, /* to_files_info */
3516 memory_insert_breakpoint, /* to_insert_breakpoint */
3517 memory_remove_breakpoint, /* to_remove_breakpoint */
3518 terminal_init_inferior, /* to_terminal_init */
3519 terminal_inferior, /* to_terminal_inferior */
3520 terminal_ours_for_output, /* to_terminal_ours_for_output */
3521 terminal_ours, /* to_terminal_ours */
3522 child_terminal_info, /* to_terminal_info */
3523 procfs_kill_inferior, /* to_kill */
3524 0, /* to_load */
3525 0, /* to_lookup_symbol */
3526 procfs_create_inferior, /* to_create_inferior */
3527 procfs_mourn_inferior, /* to_mourn_inferior */
3528 procfs_can_run, /* to_can_run */
3950a34e 3529 procfs_notice_signals, /* to_notice_signals */
3fbdd536
JG		 3530 process_stratum, /* to_stratum */
3531 0, /* to_next */
3532 1, /* to_has_all_memory */
3533 1, /* to_has_memory */
3534 1, /* to_has_stack */
3535 1, /* to_has_registers */
3536 1, /* to_has_execution */
3537 0, /* sections */
3538 0, /* sections_end */
3539 OPS_MAGIC /* to_magic */
3540};
3541
3fbdd536
JG		 3542void
3543_initialize_procfs ()
3544{
3545 add_target (&procfs_ops);
3546
3547 add_info ("proc", info_proc,
cc221e76
FF		 3548"Show process status information using /proc entry.\n\
3549Specify process id or use current inferior by default.\n\
3550Specify keywords for detailed information; default is summary.\n\
3551Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3552`status', `syscalls', and `times'.\n\
3fbdd536 3553Unambiguous abbreviations may be used.");
a39ad5ce 3554
cc221e76 3555 init_syscall_table ();
35f5886e 3556}
GDB Binutils - Deliverables
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