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