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