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import gdb-1999-11-08 snapshot
[deliverable/binutils-gdb.git] / gdb / procfs.c
1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992-98, 1999 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs
4 compatibility by Geoffrey Noer at Cygnus Solutions.
5
6 This file is part of GDB.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23
24 /* N O T E S
25
26 For information on the details of using /proc consult section proc(4)
27 in the UNIX System V Release 4 System Administrator's Reference Manual.
28
29 The general register and floating point register sets are manipulated
30 separately. This file makes the assumption that if FP0_REGNUM is
31 defined, then support for the floating point register set is desired,
32 regardless of whether or not the actual target has floating point hardware.
33
34 */
35
36
37 #include "defs.h"
38
39 #include <sys/types.h>
40 #include <time.h>
41 #include <sys/fault.h>
42 #include <sys/syscall.h>
43 #include <sys/procfs.h>
44 #include <fcntl.h>
45 #include <errno.h>
46 #include "gdb_string.h"
47 #include <stropts.h>
48 #include <poll.h>
49 #include "gdb_stat.h"
50
51 #include "inferior.h"
52 #include "target.h"
53 #include "command.h"
54 #include "gdbcore.h"
55 #include "gdbthread.h"
56
57 #if !defined(SYS_lwp_create) && defined(SYS_lwpcreate)
58 #define SYS_lwp_create SYS_lwpcreate
59 #endif
60
61 #if !defined(SYS_lwp_exit) && defined(SYS_lwpexit)
62 #define SYS_lwp_exit SYS_lwpexit
63 #endif
64
65 #if !defined(SYS_lwp_wait) && defined(SYS_lwpwait)
66 #define SYS_lwp_wait SYS_lwpwait
67 #endif
68
69 #if !defined(SYS_lwp_self) && defined(SYS_lwpself)
70 #define SYS_lwp_self SYS_lwpself
71 #endif
72
73 #if !defined(SYS_lwp_info) && defined(SYS_lwpinfo)
74 #define SYS_lwp_info SYS_lwpinfo
75 #endif
76
77 #if !defined(SYS_lwp_private) && defined(SYS_lwpprivate)
78 #define SYS_lwp_private SYS_lwpprivate
79 #endif
80
81 #if !defined(SYS_lwp_kill) && defined(SYS_lwpkill)
82 #define SYS_lwp_kill SYS_lwpkill
83 #endif
84
85 #if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend)
86 #define SYS_lwp_suspend SYS_lwpsuspend
87 #endif
88
89 #if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue)
90 #define SYS_lwp_continue SYS_lwpcontinue
91 #endif
92
93 /* the name of the proc status struct depends on the implementation */
94 /* Wrap Light Weight Process member in THE_PR_LWP macro for clearer code */
95 #ifndef HAVE_PSTATUS_T
96 typedef prstatus_t gdb_prstatus_t;
97 #define THE_PR_LWP(a) a
98 #else /* HAVE_PSTATUS_T */
99 typedef pstatus_t gdb_prstatus_t;
100 #define THE_PR_LWP(a) a.pr_lwp
101 #if !defined(HAVE_PRRUN_T) && defined(HAVE_MULTIPLE_PROC_FDS)
102 /* Fallback definitions - for using configure information directly */
103 #ifndef UNIXWARE
104 #define UNIXWARE 1
105 #endif
106 #if !defined(PROCFS_USE_READ_WRITE) && !defined(HAVE_PROCFS_PIOCSET)
107 #define PROCFS_USE_READ_WRITE 1
108 #endif
109 #endif /* !HAVE_PRRUN_T && HAVE_MULTIPLE_PROC_FDS */
110 #endif /* HAVE_PSTATUS_T */
111
112 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
113
114 /* proc name formats may vary depending on the proc implementation */
115 #ifdef HAVE_MULTIPLE_PROC_FDS
116 #ifndef CTL_PROC_NAME_FMT
117 #define CTL_PROC_NAME_FMT "/proc/%d/ctl"
118 #define AS_PROC_NAME_FMT "/proc/%d/as"
119 #define MAP_PROC_NAME_FMT "/proc/%d/map"
120 #define STATUS_PROC_NAME_FMT "/proc/%d/status"
121 #endif
122 #else /* HAVE_MULTIPLE_PROC_FDS */
123 #ifndef CTL_PROC_NAME_FMT
124 #define CTL_PROC_NAME_FMT "/proc/%05d"
125 #define AS_PROC_NAME_FMT "/proc/%05d"
126 #define MAP_PROC_NAME_FMT "/proc/%05d"
127 #define STATUS_PROC_NAME_FMT "/proc/%05d"
128 #endif
129 #endif /* HAVE_MULTIPLE_PROC_FDS */
130
131
132 /* These #ifdefs are for sol2.x in particular. sol2.x has
133 both a "gregset_t" and a "prgregset_t", which have
134 similar uses but different layouts. sol2.x gdb tries to
135 use prgregset_t (and prfpregset_t) everywhere. */
136
137 #ifdef GDB_GREGSET_TYPE
138 typedef GDB_GREGSET_TYPE gdb_gregset_t;
139 #else
140 typedef gregset_t gdb_gregset_t;
141 #endif
142
143 #ifdef GDB_FPREGSET_TYPE
144 typedef GDB_FPREGSET_TYPE gdb_fpregset_t;
145 #else
146 typedef fpregset_t gdb_fpregset_t;
147 #endif
148
149
150 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
151
152 struct target_ops procfs_ops;
153
154 int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
155 be a runnable target. Used by targets
156 that can sit atop procfs, such as solaris
157 thread support. */
158
159 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
160 CORE_ADDR kernel_u_addr;
161 #endif
162
163 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
164 #undef si_pid
165 #define si_pid _data._proc.pid
166 #undef si_uid
167 #define si_uid _data._proc._pdata._kill.uid
168 #endif /* BROKEN_SIGINFO_H */
169
170 /* Define structures for passing commands to /proc/pid/ctl file. Note that
171 while we create these for the PROCFS_USE_READ_WRITE world, we use them
172 and ignore the extra cmd int in other proc schemes.
173 */
174 /* generic ctl msg */
175 struct proc_ctl
176 {
177 int cmd;
178 long data;
179 };
180
181 /* set general registers */
182 struct greg_ctl
183 {
184 int cmd;
185 gdb_gregset_t gregset;
186 };
187
188 /* set fp registers */
189 struct fpreg_ctl
190 {
191 int cmd;
192 gdb_fpregset_t fpregset;
193 };
194
195 /* set signals to be traced */
196 struct sig_ctl
197 {
198 int cmd;
199 sigset_t sigset;
200 };
201
202 /* set faults to be traced */
203 struct flt_ctl
204 {
205 int cmd;
206 fltset_t fltset;
207 };
208
209 /* set system calls to be traced */
210 struct sys_ctl
211 {
212 int cmd;
213 sysset_t sysset;
214 };
215
216 /* set current signal to be traced */
217 struct sigi_ctl
218 {
219 int cmd;
220 siginfo_t siginfo;
221 };
222
223 /* All access to the inferior, either one started by gdb or one that has
224 been attached to, is controlled by an instance of a procinfo structure,
225 defined below. Since gdb currently only handles one inferior at a time,
226 the procinfo structure for the inferior is statically allocated and
227 only one exists at any given time. There is a separate procinfo
228 structure for use by the "info proc" command, so that we can print
229 useful information about any random process without interfering with
230 the inferior's procinfo information. */
231
232 struct procinfo
233 {
234 struct procinfo *next;
235 int pid; /* Process ID of inferior */
236 int ctl_fd; /* File descriptor for /proc ctl file */
237 int status_fd; /* File descriptor for /proc status file */
238 int as_fd; /* File descriptor for /proc as file */
239 int map_fd; /* File descriptor for /proc map file */
240 char *pathname; /* Pathname to /proc entry */
241 int had_event; /* poll/select says something happened */
242 int was_stopped; /* Nonzero if was stopped prior to attach */
243 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
244 #ifdef HAVE_PRRUN_T
245 prrun_t prrun; /* Control state when it is run */
246 #endif
247 gdb_prstatus_t prstatus; /* Current process status info */
248 struct greg_ctl gregset; /* General register set */
249 struct fpreg_ctl fpregset; /* Floating point register set */
250 struct flt_ctl fltset; /* Current traced hardware fault set */
251 struct sig_ctl trace; /* Current traced signal set */
252 struct sys_ctl exitset; /* Current traced system call exit set */
253 struct sys_ctl entryset; /* Current traced system call entry set */
254 struct sig_ctl saved_sighold; /* Saved held signal set */
255 struct flt_ctl saved_fltset; /* Saved traced hardware fault set */
256 struct sig_ctl saved_trace; /* Saved traced signal set */
257 struct sys_ctl saved_exitset; /* Saved traced system call exit set */
258 struct sys_ctl saved_entryset; /* Saved traced system call entry set */
259 int num_syscall_handlers; /* Number of syscall trap handlers
260 currently installed */
261 /* Pointer to list of syscall trap handlers */
262 struct procfs_syscall_handler *syscall_handlers;
263 int saved_rtnval; /* return value and status for wait(), */
264 int saved_statval; /* as supplied by a syscall handler. */
265 int new_child; /* Non-zero if it's a new thread */
266 };
267
268 /* List of inferior process information */
269 static struct procinfo *procinfo_list = NULL;
270 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
271
272 static int num_poll_list = 0; /* Number of entries in poll_list */
273
274 /* Much of the information used in the /proc interface, particularly for
275 printing status information, is kept as tables of structures of the
276 following form. These tables can be used to map numeric values to
277 their symbolic names and to a string that describes their specific use. */
278
279 struct trans
280 {
281 int value; /* The numeric value */
282 char *name; /* The equivalent symbolic value */
283 char *desc; /* Short description of value */
284 };
285
286 /* Translate bits in the pr_flags member of the prstatus structure, into the
287 names and desc information. */
288
289 static struct trans pr_flag_table[] =
290 {
291 #if defined (PR_STOPPED)
292 {PR_STOPPED, "PR_STOPPED", "Process is stopped"},
293 #endif
294 #if defined (PR_ISTOP)
295 {PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest"},
296 #endif
297 #if defined (PR_DSTOP)
298 {PR_DSTOP, "PR_DSTOP", "A stop directive is in effect"},
299 #endif
300 #if defined (PR_ASLEEP)
301 {PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call"},
302 #endif
303 #if defined (PR_FORK)
304 {PR_FORK, "PR_FORK", "Inherit-on-fork is in effect"},
305 #endif
306 #if defined (PR_RLC)
307 {PR_RLC, "PR_RLC", "Run-on-last-close is in effect"},
308 #endif
309 #if defined (PR_PTRACE)
310 {PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace"},
311 #endif
312 #if defined (PR_PCINVAL)
313 {PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address"},
314 #endif
315 #if defined (PR_ISSYS)
316 {PR_ISSYS, "PR_ISSYS", "Is a system process"},
317 #endif
318 #if defined (PR_STEP)
319 {PR_STEP, "PR_STEP", "Process has single step pending"},
320 #endif
321 #if defined (PR_KLC)
322 {PR_KLC, "PR_KLC", "Kill-on-last-close is in effect"},
323 #endif
324 #if defined (PR_ASYNC)
325 {PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect"},
326 #endif
327 #if defined (PR_PCOMPAT)
328 {PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect"},
329 #endif
330 #if defined (PR_MSACCT)
331 {PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled"},
332 #endif
333 #if defined (PR_BPTADJ)
334 {PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect"},
335 #endif
336 #if defined (PR_ASLWP)
337 {PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP"},
338 #endif
339 {0, NULL, NULL}
340 };
341
342 /* Translate values in the pr_why field of the prstatus struct. */
343
344 static struct trans pr_why_table[] =
345 {
346 #if defined (PR_REQUESTED)
347 {PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP"},
348 #endif
349 #if defined (PR_SIGNALLED)
350 {PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal"},
351 #endif
352 #if defined (PR_SYSENTRY)
353 {PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call"},
354 #endif
355 #if defined (PR_SYSEXIT)
356 {PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call"},
357 #endif
358 #if defined (PR_JOBCONTROL)
359 {PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action"},
360 #endif
361 #if defined (PR_FAULTED)
362 {PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault"},
363 #endif
364 #if defined (PR_SUSPENDED)
365 {PR_SUSPENDED, "PR_SUSPENDED", "Process suspended"},
366 #endif
367 #if defined (PR_CHECKPOINT)
368 {PR_CHECKPOINT, "PR_CHECKPOINT", "(???)"},
369 #endif
370 {0, NULL, NULL}
371 };
372
373 /* Hardware fault translation table. */
374
375 static struct trans faults_table[] =
376 {
377 #if defined (FLTILL)
378 {FLTILL, "FLTILL", "Illegal instruction"},
379 #endif
380 #if defined (FLTPRIV)
381 {FLTPRIV, "FLTPRIV", "Privileged instruction"},
382 #endif
383 #if defined (FLTBPT)
384 {FLTBPT, "FLTBPT", "Breakpoint trap"},
385 #endif
386 #if defined (FLTTRACE)
387 {FLTTRACE, "FLTTRACE", "Trace trap"},
388 #endif
389 #if defined (FLTACCESS)
390 {FLTACCESS, "FLTACCESS", "Memory access fault"},
391 #endif
392 #if defined (FLTBOUNDS)
393 {FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation"},
394 #endif
395 #if defined (FLTIOVF)
396 {FLTIOVF, "FLTIOVF", "Integer overflow"},
397 #endif
398 #if defined (FLTIZDIV)
399 {FLTIZDIV, "FLTIZDIV", "Integer zero divide"},
400 #endif
401 #if defined (FLTFPE)
402 {FLTFPE, "FLTFPE", "Floating-point exception"},
403 #endif
404 #if defined (FLTSTACK)
405 {FLTSTACK, "FLTSTACK", "Unrecoverable stack fault"},
406 #endif
407 #if defined (FLTPAGE)
408 {FLTPAGE, "FLTPAGE", "Recoverable page fault"},
409 #endif
410 {0, NULL, NULL}
411 };
412
413 /* Translation table for signal generation information. See UNIX System
414 V Release 4 Programmer's Reference Manual, siginfo(5). */
415
416 static struct sigcode
417 {
418 int signo;
419 int code;
420 char *codename;
421 char *desc;
422 }
423 siginfo_table[] =
424 {
425 #if defined (SIGILL) && defined (ILL_ILLOPC)
426 {
427 SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode"
428 }
429 ,
430 #endif
431 #if defined (SIGILL) && defined (ILL_ILLOPN)
432 {
433 SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
434 }
435 ,
436 #endif
437 #if defined (SIGILL) && defined (ILL_ILLADR)
438 {
439 SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode"
440 }
441 ,
442 #endif
443 #if defined (SIGILL) && defined (ILL_ILLTRP)
444 {
445 SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap"
446 }
447 ,
448 #endif
449 #if defined (SIGILL) && defined (ILL_PRVOPC)
450 {
451 SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode"
452 }
453 ,
454 #endif
455 #if defined (SIGILL) && defined (ILL_PRVREG)
456 {
457 SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register"
458 }
459 ,
460 #endif
461 #if defined (SIGILL) && defined (ILL_COPROC)
462 {
463 SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error"
464 }
465 ,
466 #endif
467 #if defined (SIGILL) && defined (ILL_BADSTK)
468 {
469 SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error"
470 }
471 ,
472 #endif
473 #if defined (SIGFPE) && defined (FPE_INTDIV)
474 {
475 SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero"
476 }
477 ,
478 #endif
479 #if defined (SIGFPE) && defined (FPE_INTOVF)
480 {
481 SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow"
482 }
483 ,
484 #endif
485 #if defined (SIGFPE) && defined (FPE_FLTDIV)
486 {
487 SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero"
488 }
489 ,
490 #endif
491 #if defined (SIGFPE) && defined (FPE_FLTOVF)
492 {
493 SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow"
494 }
495 ,
496 #endif
497 #if defined (SIGFPE) && defined (FPE_FLTUND)
498 {
499 SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow"
500 }
501 ,
502 #endif
503 #if defined (SIGFPE) && defined (FPE_FLTRES)
504 {
505 SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result"
506 }
507 ,
508 #endif
509 #if defined (SIGFPE) && defined (FPE_FLTINV)
510 {
511 SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation"
512 }
513 ,
514 #endif
515 #if defined (SIGFPE) && defined (FPE_FLTSUB)
516 {
517 SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range"
518 }
519 ,
520 #endif
521 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
522 {
523 SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object"
524 }
525 ,
526 #endif
527 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
528 {
529 SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object"
530 }
531 ,
532 #endif
533 #if defined (SIGBUS) && defined (BUS_ADRALN)
534 {
535 SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment"
536 }
537 ,
538 #endif
539 #if defined (SIGBUS) && defined (BUS_ADRERR)
540 {
541 SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address"
542 }
543 ,
544 #endif
545 #if defined (SIGBUS) && defined (BUS_OBJERR)
546 {
547 SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error"
548 }
549 ,
550 #endif
551 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
552 {
553 SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint"
554 }
555 ,
556 #endif
557 #if defined (SIGTRAP) && defined (TRAP_TRACE)
558 {
559 SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap"
560 }
561 ,
562 #endif
563 #if defined (SIGCLD) && defined (CLD_EXITED)
564 {
565 SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited"
566 }
567 ,
568 #endif
569 #if defined (SIGCLD) && defined (CLD_KILLED)
570 {
571 SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed"
572 }
573 ,
574 #endif
575 #if defined (SIGCLD) && defined (CLD_DUMPED)
576 {
577 SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally"
578 }
579 ,
580 #endif
581 #if defined (SIGCLD) && defined (CLD_TRAPPED)
582 {
583 SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped"
584 }
585 ,
586 #endif
587 #if defined (SIGCLD) && defined (CLD_STOPPED)
588 {
589 SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped"
590 }
591 ,
592 #endif
593 #if defined (SIGCLD) && defined (CLD_CONTINUED)
594 {
595 SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued"
596 }
597 ,
598 #endif
599 #if defined (SIGPOLL) && defined (POLL_IN)
600 {
601 SIGPOLL, POLL_IN, "POLL_IN", "Input input available"
602 }
603 ,
604 #endif
605 #if defined (SIGPOLL) && defined (POLL_OUT)
606 {
607 SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available"
608 }
609 ,
610 #endif
611 #if defined (SIGPOLL) && defined (POLL_MSG)
612 {
613 SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available"
614 }
615 ,
616 #endif
617 #if defined (SIGPOLL) && defined (POLL_ERR)
618 {
619 SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error"
620 }
621 ,
622 #endif
623 #if defined (SIGPOLL) && defined (POLL_PRI)
624 {
625 SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available"
626 }
627 ,
628 #endif
629 #if defined (SIGPOLL) && defined (POLL_HUP)
630 {
631 SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected"
632 }
633 ,
634 #endif
635 {
636 0, 0, NULL, NULL
637 }
638 };
639
640 static char *syscall_table[MAX_SYSCALLS];
641
642 /* Prototypes for local functions */
643
644 static void procfs_stop PARAMS ((void));
645
646 static int procfs_thread_alive PARAMS ((int));
647
648 static int procfs_can_run PARAMS ((void));
649
650 static void procfs_mourn_inferior PARAMS ((void));
651
652 static void procfs_fetch_registers PARAMS ((int));
653
654 static int procfs_wait PARAMS ((int, struct target_waitstatus *));
655
656 static void procfs_open PARAMS ((char *, int));
657
658 static void procfs_files_info PARAMS ((struct target_ops *));
659
660 static void procfs_prepare_to_store PARAMS ((void));
661
662 static void procfs_detach PARAMS ((char *, int));
663
664 static void procfs_attach PARAMS ((char *, int));
665
666 static void proc_set_exec_trap PARAMS ((void));
667
668 static void procfs_init_inferior PARAMS ((int));
669
670 static struct procinfo *create_procinfo PARAMS ((int));
671
672 static void procfs_store_registers PARAMS ((int));
673
674 static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
675
676 static void procfs_kill_inferior PARAMS ((void));
677
678 static char *sigcodedesc PARAMS ((siginfo_t *));
679
680 static char *sigcodename PARAMS ((siginfo_t *));
681
682 static struct procinfo *wait_fd PARAMS ((void));
683
684 static void remove_fd PARAMS ((struct procinfo *));
685
686 static void add_fd PARAMS ((struct procinfo *));
687
688 static void set_proc_siginfo PARAMS ((struct procinfo *, int));
689
690 static void init_syscall_table PARAMS ((void));
691
692 static char *syscallname PARAMS ((int));
693
694 static char *signalname PARAMS ((int));
695
696 static char *errnoname PARAMS ((int));
697
698 static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
699
700 static int open_proc_file PARAMS ((int, struct procinfo *, int, int));
701
702 static void close_proc_file PARAMS ((struct procinfo *));
703
704 static void close_proc_file_cleanup PARAMS ((void *));
705
706 static struct cleanup *make_cleanup_close_proc_file PARAMS ((struct procinfo *));
707
708 static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
709
710 static NORETURN void proc_init_failed
711 PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN;
712
713 static void info_proc PARAMS ((char *, int));
714
715 static void info_proc_flags PARAMS ((struct procinfo *, int));
716
717 static void info_proc_stop PARAMS ((struct procinfo *, int));
718
719 static void info_proc_siginfo PARAMS ((struct procinfo *, int));
720
721 static void info_proc_syscalls PARAMS ((struct procinfo *, int));
722
723 static void info_proc_mappings PARAMS ((struct procinfo *, int));
724
725 static void info_proc_signals PARAMS ((struct procinfo *, int));
726
727 static void info_proc_faults PARAMS ((struct procinfo *, int));
728
729 static char *mappingflags PARAMS ((long));
730
731 static char *lookupname PARAMS ((struct trans *, unsigned int, char *));
732
733 static char *lookupdesc PARAMS ((struct trans *, unsigned int));
734
735 static int do_attach PARAMS ((int pid));
736
737 static void do_detach PARAMS ((int siggnal));
738
739 static void procfs_create_inferior PARAMS ((char *, char *, char **));
740
741 static void procfs_notice_signals PARAMS ((int pid));
742
743 static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *));
744
745 static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
746
747 static int procfs_write_pcwstop PARAMS ((struct procinfo *));
748 static int procfs_read_status PARAMS ((struct procinfo *));
749 static void procfs_write_pckill PARAMS ((struct procinfo *));
750
751 typedef int syscall_func_t PARAMS ((struct procinfo * pi, int syscall_num,
752 int why, int *rtnval, int *statval));
753
754 static void procfs_set_syscall_trap PARAMS ((struct procinfo * pi,
755 int syscall_num, int flags,
756 syscall_func_t * func));
757
758 static void procfs_clear_syscall_trap PARAMS ((struct procinfo * pi,
759 int syscall_num, int errok));
760
761 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
762 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
763
764 static syscall_func_t procfs_exit_handler;
765
766 static syscall_func_t procfs_exec_handler;
767
768 #ifdef SYS_sproc
769 static syscall_func_t procfs_sproc_handler;
770 static syscall_func_t procfs_fork_handler;
771 #endif
772
773 #ifdef SYS_lwp_create
774 static syscall_func_t procfs_lwp_creation_handler;
775 #endif
776
777 static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag));
778 static void modify_run_on_last_close_flag PARAMS ((int fd, int flag));
779
780 /* */
781
782 struct procfs_syscall_handler
783 {
784 int syscall_num; /* The number of the system call being handled */
785 /* The function to be called */
786 syscall_func_t *func;
787 };
788
789 static void procfs_resume PARAMS ((int pid, int step,
790 enum target_signal signo));
791
792 static void init_procfs_ops PARAMS ((void));
793
794 /* External function prototypes that can't be easily included in any
795 header file because the args are typedefs in system include files. */
796
797 extern void supply_gregset PARAMS ((gdb_gregset_t *));
798
799 extern void fill_gregset PARAMS ((gdb_gregset_t *, int));
800
801 #ifdef FP0_REGNUM
802 extern void supply_fpregset PARAMS ((gdb_fpregset_t *));
803
804 extern void fill_fpregset PARAMS ((gdb_fpregset_t *, int));
805 #endif
806
807 /*
808
809 LOCAL FUNCTION
810
811 find_procinfo -- convert a process id to a struct procinfo
812
813 SYNOPSIS
814
815 static struct procinfo * find_procinfo (pid_t pid, int okfail);
816
817 DESCRIPTION
818
819 Given a process id, look it up in the procinfo chain. Returns
820 a struct procinfo *. If can't find pid, then call error(),
821 unless okfail is set, in which case, return NULL;
822 */
823
824 static struct procinfo *
825 find_procinfo (pid, okfail)
826 pid_t pid;
827 int okfail;
828 {
829 struct procinfo *procinfo;
830
831 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
832 if (procinfo->pid == pid)
833 return procinfo;
834
835 if (okfail)
836 return NULL;
837
838 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
839 }
840
841 /*
842
843 LOCAL MACRO
844
845 current_procinfo -- convert inferior_pid to a struct procinfo
846
847 SYNOPSIS
848
849 static struct procinfo * current_procinfo;
850
851 DESCRIPTION
852
853 Looks up inferior_pid in the procinfo chain. Always returns a
854 struct procinfo *. If process can't be found, we error() out.
855 */
856
857 #define current_procinfo find_procinfo (inferior_pid, 0)
858
859 /*
860
861 LOCAL FUNCTION
862
863 add_fd -- Add the fd to the poll/select list
864
865 SYNOPSIS
866
867 static void add_fd (struct procinfo *);
868
869 DESCRIPTION
870
871 Add the fd of the supplied procinfo to the list of fds used for
872 poll/select operations.
873 */
874
875 static void
876 add_fd (pi)
877 struct procinfo *pi;
878 {
879 if (num_poll_list <= 0)
880 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
881 else
882 poll_list = (struct pollfd *) xrealloc (poll_list,
883 (num_poll_list + 1)
884 * sizeof (struct pollfd));
885 poll_list[num_poll_list].fd = pi->ctl_fd;
886 #ifdef UNIXWARE
887 poll_list[num_poll_list].events = POLLWRNORM;
888 #else
889 poll_list[num_poll_list].events = POLLPRI;
890 #endif
891
892 num_poll_list++;
893 }
894
895 /*
896
897 LOCAL FUNCTION
898
899 remove_fd -- Remove the fd from the poll/select list
900
901 SYNOPSIS
902
903 static void remove_fd (struct procinfo *);
904
905 DESCRIPTION
906
907 Remove the fd of the supplied procinfo from the list of fds used
908 for poll/select operations.
909 */
910
911 static void
912 remove_fd (pi)
913 struct procinfo *pi;
914 {
915 int i;
916
917 for (i = 0; i < num_poll_list; i++)
918 {
919 if (poll_list[i].fd == pi->ctl_fd)
920 {
921 if (i != num_poll_list - 1)
922 memcpy (poll_list + i, poll_list + i + 1,
923 (num_poll_list - i - 1) * sizeof (struct pollfd));
924
925 num_poll_list--;
926
927 if (num_poll_list == 0)
928 free (poll_list);
929 else
930 poll_list = (struct pollfd *) xrealloc (poll_list,
931 num_poll_list
932 * sizeof (struct pollfd));
933 return;
934 }
935 }
936 }
937
938 /*
939
940 LOCAL FUNCTION
941
942 procfs_read_status - get procfs fd status
943
944 SYNOPSIS
945
946 static int procfs_read_status (pi) struct procinfo *pi;
947
948 DESCRIPTION
949
950 Given a pointer to a procinfo struct, get the status of
951 the status_fd in the appropriate way. Returns 0 on failure,
952 1 on success.
953 */
954
955 static int
956 procfs_read_status (pi)
957 struct procinfo *pi;
958 {
959 #ifdef PROCFS_USE_READ_WRITE
960 if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) ||
961 (read (pi->status_fd, (char *) &pi->prstatus,
962 sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t)))
963 #else
964 if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0)
965 #endif
966 return 0;
967 else
968 return 1;
969 }
970
971 /*
972
973 LOCAL FUNCTION
974
975 procfs_write_pcwstop - send a PCWSTOP to procfs fd
976
977 SYNOPSIS
978
979 static int procfs_write_pcwstop (pi) struct procinfo *pi;
980
981 DESCRIPTION
982
983 Given a pointer to a procinfo struct, send a PCWSTOP to
984 the ctl_fd in the appropriate way. Returns 0 on failure,
985 1 on success.
986 */
987
988 static int
989 procfs_write_pcwstop (pi)
990 struct procinfo *pi;
991 {
992 #ifdef PROCFS_USE_READ_WRITE
993 long cmd = PCWSTOP;
994 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
995 #else
996 if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0)
997 #endif
998 return 0;
999 else
1000 return 1;
1001 }
1002
1003 /*
1004
1005 LOCAL FUNCTION
1006
1007 procfs_write_pckill - send a kill to procfs fd
1008
1009 SYNOPSIS
1010
1011 static void procfs_write_pckill (pi) struct procinfo *pi;
1012
1013 DESCRIPTION
1014
1015 Given a pointer to a procinfo struct, send a kill to
1016 the ctl_fd in the appropriate way. Returns 0 on failure,
1017 1 on success.
1018 */
1019
1020 static void
1021 procfs_write_pckill (pi)
1022 struct procinfo *pi;
1023 {
1024 #ifdef PROCFS_USE_READ_WRITE
1025 struct proc_ctl pctl;
1026 pctl.cmd = PCKILL;
1027 pctl.data = SIGKILL;
1028 write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl));
1029 #else
1030 int signo = SIGKILL;
1031 ioctl (pi->ctl_fd, PIOCKILL, &signo);
1032 #endif
1033 }
1034
1035 static struct procinfo *
1036 wait_fd ()
1037 {
1038 struct procinfo *pi, *next_pi;
1039 #ifndef LOSING_POLL
1040 int num_fds;
1041 int i;
1042 #endif
1043
1044 set_sigint_trap (); /* Causes SIGINT to be passed on to the
1045 attached process. */
1046 set_sigio_trap ();
1047
1048 wait_again:
1049 #ifndef LOSING_POLL
1050 while (1)
1051 {
1052 num_fds = poll (poll_list, num_poll_list, -1);
1053 if (num_fds > 0)
1054 break;
1055 if (num_fds < 0 && errno == EINTR)
1056 continue;
1057 print_sys_errmsg ("poll failed", errno);
1058 error ("Poll failed, returned %d", num_fds);
1059 }
1060 #else /* LOSING_POLL */
1061 pi = current_procinfo;
1062
1063 while (!procfs_write_pcwstop (pi))
1064 {
1065 if (errno == ENOENT)
1066 {
1067 /* Process exited. */
1068 pi->prstatus.pr_flags = 0;
1069 break;
1070 }
1071 else if (errno != EINTR)
1072 {
1073 print_sys_errmsg (pi->pathname, errno);
1074 error ("procfs_write_pcwstop failed");
1075 }
1076 }
1077 pi->had_event = 1;
1078 #endif /* LOSING_POLL */
1079
1080 clear_sigint_trap ();
1081 clear_sigio_trap ();
1082
1083 #ifndef LOSING_POLL
1084
1085 for (i = 0; i < num_poll_list && num_fds > 0; i++)
1086 {
1087 if (0 == (poll_list[i].revents &
1088 (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL)))
1089 continue;
1090 for (pi = procinfo_list; pi; pi = next_pi)
1091 {
1092 next_pi = pi->next;
1093 if (poll_list[i].fd == pi->ctl_fd)
1094 {
1095 num_fds--;
1096 if ((poll_list[i].revents & POLLHUP) != 0 ||
1097 !procfs_read_status (pi))
1098 { /* The LWP has apparently terminated. */
1099 if (num_poll_list <= 1)
1100 {
1101 pi->prstatus.pr_flags = 0;
1102 pi->had_event = 1;
1103 break;
1104 }
1105 if (info_verbose)
1106 printf_filtered ("LWP %d exited.\n",
1107 (pi->pid >> 16) & 0xffff);
1108 close_proc_file (pi);
1109 i--; /* don't skip deleted entry */
1110 if (num_fds != 0)
1111 break; /* already another event to process */
1112 else
1113 goto wait_again; /* wait for another event */
1114 }
1115 pi->had_event = 1;
1116 break;
1117 }
1118 }
1119 if (!pi)
1120 error ("wait_fd: Couldn't find procinfo for fd %d\n",
1121 poll_list[i].fd);
1122 }
1123 #endif /* LOSING_POLL */
1124
1125 return pi;
1126 }
1127
1128 /*
1129
1130 LOCAL FUNCTION
1131
1132 lookupdesc -- translate a value to a summary desc string
1133
1134 SYNOPSIS
1135
1136 static char *lookupdesc (struct trans *transp, unsigned int val);
1137
1138 DESCRIPTION
1139
1140 Given a pointer to a translation table and a value to be translated,
1141 lookup the desc string and return it.
1142 */
1143
1144 static char *
1145 lookupdesc (transp, val)
1146 struct trans *transp;
1147 unsigned int val;
1148 {
1149 char *desc;
1150
1151 for (desc = NULL; transp->name != NULL; transp++)
1152 {
1153 if (transp->value == val)
1154 {
1155 desc = transp->desc;
1156 break;
1157 }
1158 }
1159
1160 /* Didn't find a translation for the specified value, set a default one. */
1161
1162 if (desc == NULL)
1163 {
1164 desc = "Unknown";
1165 }
1166 return (desc);
1167 }
1168
1169 /*
1170
1171 LOCAL FUNCTION
1172
1173 lookupname -- translate a value to symbolic name
1174
1175 SYNOPSIS
1176
1177 static char *lookupname (struct trans *transp, unsigned int val,
1178 char *prefix);
1179
1180 DESCRIPTION
1181
1182 Given a pointer to a translation table, a value to be translated,
1183 and a default prefix to return if the value can't be translated,
1184 match the value with one of the translation table entries and
1185 return a pointer to the symbolic name.
1186
1187 If no match is found it just returns the value as a printable string,
1188 with the given prefix. The previous such value, if any, is freed
1189 at this time.
1190 */
1191
1192 static char *
1193 lookupname (transp, val, prefix)
1194 struct trans *transp;
1195 unsigned int val;
1196 char *prefix;
1197 {
1198 static char *locbuf;
1199 char *name;
1200
1201 for (name = NULL; transp->name != NULL; transp++)
1202 {
1203 if (transp->value == val)
1204 {
1205 name = transp->name;
1206 break;
1207 }
1208 }
1209
1210 /* Didn't find a translation for the specified value, build a default
1211 one using the specified prefix and return it. The lifetime of
1212 the value is only until the next one is needed. */
1213
1214 if (name == NULL)
1215 {
1216 if (locbuf != NULL)
1217 {
1218 free (locbuf);
1219 }
1220 locbuf = xmalloc (strlen (prefix) + 16);
1221 sprintf (locbuf, "%s %u", prefix, val);
1222 name = locbuf;
1223 }
1224 return (name);
1225 }
1226
1227 static char *
1228 sigcodename (sip)
1229 siginfo_t *sip;
1230 {
1231 struct sigcode *scp;
1232 char *name = NULL;
1233 static char locbuf[32];
1234
1235 for (scp = siginfo_table; scp->codename != NULL; scp++)
1236 {
1237 if ((scp->signo == sip->si_signo) &&
1238 (scp->code == sip->si_code))
1239 {
1240 name = scp->codename;
1241 break;
1242 }
1243 }
1244 if (name == NULL)
1245 {
1246 sprintf (locbuf, "sigcode %u", sip->si_signo);
1247 name = locbuf;
1248 }
1249 return (name);
1250 }
1251
1252 static char *
1253 sigcodedesc (sip)
1254 siginfo_t *sip;
1255 {
1256 struct sigcode *scp;
1257 char *desc = NULL;
1258
1259 for (scp = siginfo_table; scp->codename != NULL; scp++)
1260 {
1261 if ((scp->signo == sip->si_signo) &&
1262 (scp->code == sip->si_code))
1263 {
1264 desc = scp->desc;
1265 break;
1266 }
1267 }
1268 if (desc == NULL)
1269 {
1270 desc = "Unrecognized signal or trap use";
1271 }
1272 return (desc);
1273 }
1274
1275 /*
1276
1277 LOCAL FUNCTION
1278
1279 syscallname - translate a system call number into a system call name
1280
1281 SYNOPSIS
1282
1283 char *syscallname (int syscallnum)
1284
1285 DESCRIPTION
1286
1287 Given a system call number, translate it into the printable name
1288 of a system call, or into "syscall <num>" if it is an unknown
1289 number.
1290 */
1291
1292 static char *
1293 syscallname (syscallnum)
1294 int syscallnum;
1295 {
1296 static char locbuf[32];
1297
1298 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS
1299 && syscall_table[syscallnum] != NULL)
1300 return syscall_table[syscallnum];
1301 else
1302 {
1303 sprintf (locbuf, "syscall %u", syscallnum);
1304 return locbuf;
1305 }
1306 }
1307
1308 /*
1309
1310 LOCAL FUNCTION
1311
1312 init_syscall_table - initialize syscall translation table
1313
1314 SYNOPSIS
1315
1316 void init_syscall_table (void)
1317
1318 DESCRIPTION
1319
1320 Dynamically initialize the translation table to convert system
1321 call numbers into printable system call names. Done once per
1322 gdb run, on initialization.
1323
1324 NOTES
1325
1326 This is awfully ugly, but preprocessor tricks to make it prettier
1327 tend to be nonportable.
1328 */
1329
1330 static void
1331 init_syscall_table ()
1332 {
1333 #if defined (SYS_exit)
1334 syscall_table[SYS_exit] = "exit";
1335 #endif
1336 #if defined (SYS_fork)
1337 syscall_table[SYS_fork] = "fork";
1338 #endif
1339 #if defined (SYS_read)
1340 syscall_table[SYS_read] = "read";
1341 #endif
1342 #if defined (SYS_write)
1343 syscall_table[SYS_write] = "write";
1344 #endif
1345 #if defined (SYS_open)
1346 syscall_table[SYS_open] = "open";
1347 #endif
1348 #if defined (SYS_close)
1349 syscall_table[SYS_close] = "close";
1350 #endif
1351 #if defined (SYS_wait)
1352 syscall_table[SYS_wait] = "wait";
1353 #endif
1354 #if defined (SYS_creat)
1355 syscall_table[SYS_creat] = "creat";
1356 #endif
1357 #if defined (SYS_link)
1358 syscall_table[SYS_link] = "link";
1359 #endif
1360 #if defined (SYS_unlink)
1361 syscall_table[SYS_unlink] = "unlink";
1362 #endif
1363 #if defined (SYS_exec)
1364 syscall_table[SYS_exec] = "exec";
1365 #endif
1366 #if defined (SYS_execv)
1367 syscall_table[SYS_execv] = "execv";
1368 #endif
1369 #if defined (SYS_execve)
1370 syscall_table[SYS_execve] = "execve";
1371 #endif
1372 #if defined (SYS_chdir)
1373 syscall_table[SYS_chdir] = "chdir";
1374 #endif
1375 #if defined (SYS_time)
1376 syscall_table[SYS_time] = "time";
1377 #endif
1378 #if defined (SYS_mknod)
1379 syscall_table[SYS_mknod] = "mknod";
1380 #endif
1381 #if defined (SYS_chmod)
1382 syscall_table[SYS_chmod] = "chmod";
1383 #endif
1384 #if defined (SYS_chown)
1385 syscall_table[SYS_chown] = "chown";
1386 #endif
1387 #if defined (SYS_brk)
1388 syscall_table[SYS_brk] = "brk";
1389 #endif
1390 #if defined (SYS_stat)
1391 syscall_table[SYS_stat] = "stat";
1392 #endif
1393 #if defined (SYS_lseek)
1394 syscall_table[SYS_lseek] = "lseek";
1395 #endif
1396 #if defined (SYS_getpid)
1397 syscall_table[SYS_getpid] = "getpid";
1398 #endif
1399 #if defined (SYS_mount)
1400 syscall_table[SYS_mount] = "mount";
1401 #endif
1402 #if defined (SYS_umount)
1403 syscall_table[SYS_umount] = "umount";
1404 #endif
1405 #if defined (SYS_setuid)
1406 syscall_table[SYS_setuid] = "setuid";
1407 #endif
1408 #if defined (SYS_getuid)
1409 syscall_table[SYS_getuid] = "getuid";
1410 #endif
1411 #if defined (SYS_stime)
1412 syscall_table[SYS_stime] = "stime";
1413 #endif
1414 #if defined (SYS_ptrace)
1415 syscall_table[SYS_ptrace] = "ptrace";
1416 #endif
1417 #if defined (SYS_alarm)
1418 syscall_table[SYS_alarm] = "alarm";
1419 #endif
1420 #if defined (SYS_fstat)
1421 syscall_table[SYS_fstat] = "fstat";
1422 #endif
1423 #if defined (SYS_pause)
1424 syscall_table[SYS_pause] = "pause";
1425 #endif
1426 #if defined (SYS_utime)
1427 syscall_table[SYS_utime] = "utime";
1428 #endif
1429 #if defined (SYS_stty)
1430 syscall_table[SYS_stty] = "stty";
1431 #endif
1432 #if defined (SYS_gtty)
1433 syscall_table[SYS_gtty] = "gtty";
1434 #endif
1435 #if defined (SYS_access)
1436 syscall_table[SYS_access] = "access";
1437 #endif
1438 #if defined (SYS_nice)
1439 syscall_table[SYS_nice] = "nice";
1440 #endif
1441 #if defined (SYS_statfs)
1442 syscall_table[SYS_statfs] = "statfs";
1443 #endif
1444 #if defined (SYS_sync)
1445 syscall_table[SYS_sync] = "sync";
1446 #endif
1447 #if defined (SYS_kill)
1448 syscall_table[SYS_kill] = "kill";
1449 #endif
1450 #if defined (SYS_fstatfs)
1451 syscall_table[SYS_fstatfs] = "fstatfs";
1452 #endif
1453 #if defined (SYS_pgrpsys)
1454 syscall_table[SYS_pgrpsys] = "pgrpsys";
1455 #endif
1456 #if defined (SYS_xenix)
1457 syscall_table[SYS_xenix] = "xenix";
1458 #endif
1459 #if defined (SYS_dup)
1460 syscall_table[SYS_dup] = "dup";
1461 #endif
1462 #if defined (SYS_pipe)
1463 syscall_table[SYS_pipe] = "pipe";
1464 #endif
1465 #if defined (SYS_times)
1466 syscall_table[SYS_times] = "times";
1467 #endif
1468 #if defined (SYS_profil)
1469 syscall_table[SYS_profil] = "profil";
1470 #endif
1471 #if defined (SYS_plock)
1472 syscall_table[SYS_plock] = "plock";
1473 #endif
1474 #if defined (SYS_setgid)
1475 syscall_table[SYS_setgid] = "setgid";
1476 #endif
1477 #if defined (SYS_getgid)
1478 syscall_table[SYS_getgid] = "getgid";
1479 #endif
1480 #if defined (SYS_signal)
1481 syscall_table[SYS_signal] = "signal";
1482 #endif
1483 #if defined (SYS_msgsys)
1484 syscall_table[SYS_msgsys] = "msgsys";
1485 #endif
1486 #if defined (SYS_sys3b)
1487 syscall_table[SYS_sys3b] = "sys3b";
1488 #endif
1489 #if defined (SYS_sysi86)
1490 syscall_table[SYS_sysi86] = "sysi86";
1491 #endif
1492 #if defined (SYS_acct)
1493 syscall_table[SYS_acct] = "acct";
1494 #endif
1495 #if defined (SYS_shmsys)
1496 syscall_table[SYS_shmsys] = "shmsys";
1497 #endif
1498 #if defined (SYS_semsys)
1499 syscall_table[SYS_semsys] = "semsys";
1500 #endif
1501 #if defined (SYS_ioctl)
1502 syscall_table[SYS_ioctl] = "ioctl";
1503 #endif
1504 #if defined (SYS_uadmin)
1505 syscall_table[SYS_uadmin] = "uadmin";
1506 #endif
1507 #if defined (SYS_utssys)
1508 syscall_table[SYS_utssys] = "utssys";
1509 #endif
1510 #if defined (SYS_fsync)
1511 syscall_table[SYS_fsync] = "fsync";
1512 #endif
1513 #if defined (SYS_umask)
1514 syscall_table[SYS_umask] = "umask";
1515 #endif
1516 #if defined (SYS_chroot)
1517 syscall_table[SYS_chroot] = "chroot";
1518 #endif
1519 #if defined (SYS_fcntl)
1520 syscall_table[SYS_fcntl] = "fcntl";
1521 #endif
1522 #if defined (SYS_ulimit)
1523 syscall_table[SYS_ulimit] = "ulimit";
1524 #endif
1525 #if defined (SYS_rfsys)
1526 syscall_table[SYS_rfsys] = "rfsys";
1527 #endif
1528 #if defined (SYS_rmdir)
1529 syscall_table[SYS_rmdir] = "rmdir";
1530 #endif
1531 #if defined (SYS_mkdir)
1532 syscall_table[SYS_mkdir] = "mkdir";
1533 #endif
1534 #if defined (SYS_getdents)
1535 syscall_table[SYS_getdents] = "getdents";
1536 #endif
1537 #if defined (SYS_sysfs)
1538 syscall_table[SYS_sysfs] = "sysfs";
1539 #endif
1540 #if defined (SYS_getmsg)
1541 syscall_table[SYS_getmsg] = "getmsg";
1542 #endif
1543 #if defined (SYS_putmsg)
1544 syscall_table[SYS_putmsg] = "putmsg";
1545 #endif
1546 #if defined (SYS_poll)
1547 syscall_table[SYS_poll] = "poll";
1548 #endif
1549 #if defined (SYS_lstat)
1550 syscall_table[SYS_lstat] = "lstat";
1551 #endif
1552 #if defined (SYS_symlink)
1553 syscall_table[SYS_symlink] = "symlink";
1554 #endif
1555 #if defined (SYS_readlink)
1556 syscall_table[SYS_readlink] = "readlink";
1557 #endif
1558 #if defined (SYS_setgroups)
1559 syscall_table[SYS_setgroups] = "setgroups";
1560 #endif
1561 #if defined (SYS_getgroups)
1562 syscall_table[SYS_getgroups] = "getgroups";
1563 #endif
1564 #if defined (SYS_fchmod)
1565 syscall_table[SYS_fchmod] = "fchmod";
1566 #endif
1567 #if defined (SYS_fchown)
1568 syscall_table[SYS_fchown] = "fchown";
1569 #endif
1570 #if defined (SYS_sigprocmask)
1571 syscall_table[SYS_sigprocmask] = "sigprocmask";
1572 #endif
1573 #if defined (SYS_sigsuspend)
1574 syscall_table[SYS_sigsuspend] = "sigsuspend";
1575 #endif
1576 #if defined (SYS_sigaltstack)
1577 syscall_table[SYS_sigaltstack] = "sigaltstack";
1578 #endif
1579 #if defined (SYS_sigaction)
1580 syscall_table[SYS_sigaction] = "sigaction";
1581 #endif
1582 #if defined (SYS_sigpending)
1583 syscall_table[SYS_sigpending] = "sigpending";
1584 #endif
1585 #if defined (SYS_context)
1586 syscall_table[SYS_context] = "context";
1587 #endif
1588 #if defined (SYS_evsys)
1589 syscall_table[SYS_evsys] = "evsys";
1590 #endif
1591 #if defined (SYS_evtrapret)
1592 syscall_table[SYS_evtrapret] = "evtrapret";
1593 #endif
1594 #if defined (SYS_statvfs)
1595 syscall_table[SYS_statvfs] = "statvfs";
1596 #endif
1597 #if defined (SYS_fstatvfs)
1598 syscall_table[SYS_fstatvfs] = "fstatvfs";
1599 #endif
1600 #if defined (SYS_nfssys)
1601 syscall_table[SYS_nfssys] = "nfssys";
1602 #endif
1603 #if defined (SYS_waitsys)
1604 syscall_table[SYS_waitsys] = "waitsys";
1605 #endif
1606 #if defined (SYS_sigsendsys)
1607 syscall_table[SYS_sigsendsys] = "sigsendsys";
1608 #endif
1609 #if defined (SYS_hrtsys)
1610 syscall_table[SYS_hrtsys] = "hrtsys";
1611 #endif
1612 #if defined (SYS_acancel)
1613 syscall_table[SYS_acancel] = "acancel";
1614 #endif
1615 #if defined (SYS_async)
1616 syscall_table[SYS_async] = "async";
1617 #endif
1618 #if defined (SYS_priocntlsys)
1619 syscall_table[SYS_priocntlsys] = "priocntlsys";
1620 #endif
1621 #if defined (SYS_pathconf)
1622 syscall_table[SYS_pathconf] = "pathconf";
1623 #endif
1624 #if defined (SYS_mincore)
1625 syscall_table[SYS_mincore] = "mincore";
1626 #endif
1627 #if defined (SYS_mmap)
1628 syscall_table[SYS_mmap] = "mmap";
1629 #endif
1630 #if defined (SYS_mprotect)
1631 syscall_table[SYS_mprotect] = "mprotect";
1632 #endif
1633 #if defined (SYS_munmap)
1634 syscall_table[SYS_munmap] = "munmap";
1635 #endif
1636 #if defined (SYS_fpathconf)
1637 syscall_table[SYS_fpathconf] = "fpathconf";
1638 #endif
1639 #if defined (SYS_vfork)
1640 syscall_table[SYS_vfork] = "vfork";
1641 #endif
1642 #if defined (SYS_fchdir)
1643 syscall_table[SYS_fchdir] = "fchdir";
1644 #endif
1645 #if defined (SYS_readv)
1646 syscall_table[SYS_readv] = "readv";
1647 #endif
1648 #if defined (SYS_writev)
1649 syscall_table[SYS_writev] = "writev";
1650 #endif
1651 #if defined (SYS_xstat)
1652 syscall_table[SYS_xstat] = "xstat";
1653 #endif
1654 #if defined (SYS_lxstat)
1655 syscall_table[SYS_lxstat] = "lxstat";
1656 #endif
1657 #if defined (SYS_fxstat)
1658 syscall_table[SYS_fxstat] = "fxstat";
1659 #endif
1660 #if defined (SYS_xmknod)
1661 syscall_table[SYS_xmknod] = "xmknod";
1662 #endif
1663 #if defined (SYS_clocal)
1664 syscall_table[SYS_clocal] = "clocal";
1665 #endif
1666 #if defined (SYS_setrlimit)
1667 syscall_table[SYS_setrlimit] = "setrlimit";
1668 #endif
1669 #if defined (SYS_getrlimit)
1670 syscall_table[SYS_getrlimit] = "getrlimit";
1671 #endif
1672 #if defined (SYS_lchown)
1673 syscall_table[SYS_lchown] = "lchown";
1674 #endif
1675 #if defined (SYS_memcntl)
1676 syscall_table[SYS_memcntl] = "memcntl";
1677 #endif
1678 #if defined (SYS_getpmsg)
1679 syscall_table[SYS_getpmsg] = "getpmsg";
1680 #endif
1681 #if defined (SYS_putpmsg)
1682 syscall_table[SYS_putpmsg] = "putpmsg";
1683 #endif
1684 #if defined (SYS_rename)
1685 syscall_table[SYS_rename] = "rename";
1686 #endif
1687 #if defined (SYS_uname)
1688 syscall_table[SYS_uname] = "uname";
1689 #endif
1690 #if defined (SYS_setegid)
1691 syscall_table[SYS_setegid] = "setegid";
1692 #endif
1693 #if defined (SYS_sysconfig)
1694 syscall_table[SYS_sysconfig] = "sysconfig";
1695 #endif
1696 #if defined (SYS_adjtime)
1697 syscall_table[SYS_adjtime] = "adjtime";
1698 #endif
1699 #if defined (SYS_systeminfo)
1700 syscall_table[SYS_systeminfo] = "systeminfo";
1701 #endif
1702 #if defined (SYS_seteuid)
1703 syscall_table[SYS_seteuid] = "seteuid";
1704 #endif
1705 #if defined (SYS_sproc)
1706 syscall_table[SYS_sproc] = "sproc";
1707 #endif
1708 #if defined (SYS_keyctl)
1709 syscall_table[SYS_keyctl] = "keyctl";
1710 #endif
1711 #if defined (SYS_secsys)
1712 syscall_table[SYS_secsys] = "secsys";
1713 #endif
1714 #if defined (SYS_filepriv)
1715 syscall_table[SYS_filepriv] = "filepriv";
1716 #endif
1717 #if defined (SYS_procpriv)
1718 syscall_table[SYS_procpriv] = "procpriv";
1719 #endif
1720 #if defined (SYS_devstat)
1721 syscall_table[SYS_devstat] = "devstat";
1722 #endif
1723 #if defined (SYS_aclipc)
1724 syscall_table[SYS_aclipc] = "aclipc";
1725 #endif
1726 #if defined (SYS_fdevstat)
1727 syscall_table[SYS_fdevstat] = "fdevstat";
1728 #endif
1729 #if defined (SYS_flvlfile)
1730 syscall_table[SYS_flvlfile] = "flvlfile";
1731 #endif
1732 #if defined (SYS_lvlfile)
1733 syscall_table[SYS_lvlfile] = "lvlfile";
1734 #endif
1735 #if defined (SYS_lvlequal)
1736 syscall_table[SYS_lvlequal] = "lvlequal";
1737 #endif
1738 #if defined (SYS_lvlproc)
1739 syscall_table[SYS_lvlproc] = "lvlproc";
1740 #endif
1741 #if defined (SYS_lvlipc)
1742 syscall_table[SYS_lvlipc] = "lvlipc";
1743 #endif
1744 #if defined (SYS_acl)
1745 syscall_table[SYS_acl] = "acl";
1746 #endif
1747 #if defined (SYS_auditevt)
1748 syscall_table[SYS_auditevt] = "auditevt";
1749 #endif
1750 #if defined (SYS_auditctl)
1751 syscall_table[SYS_auditctl] = "auditctl";
1752 #endif
1753 #if defined (SYS_auditdmp)
1754 syscall_table[SYS_auditdmp] = "auditdmp";
1755 #endif
1756 #if defined (SYS_auditlog)
1757 syscall_table[SYS_auditlog] = "auditlog";
1758 #endif
1759 #if defined (SYS_auditbuf)
1760 syscall_table[SYS_auditbuf] = "auditbuf";
1761 #endif
1762 #if defined (SYS_lvldom)
1763 syscall_table[SYS_lvldom] = "lvldom";
1764 #endif
1765 #if defined (SYS_lvlvfs)
1766 syscall_table[SYS_lvlvfs] = "lvlvfs";
1767 #endif
1768 #if defined (SYS_mkmld)
1769 syscall_table[SYS_mkmld] = "mkmld";
1770 #endif
1771 #if defined (SYS_mldmode)
1772 syscall_table[SYS_mldmode] = "mldmode";
1773 #endif
1774 #if defined (SYS_secadvise)
1775 syscall_table[SYS_secadvise] = "secadvise";
1776 #endif
1777 #if defined (SYS_online)
1778 syscall_table[SYS_online] = "online";
1779 #endif
1780 #if defined (SYS_setitimer)
1781 syscall_table[SYS_setitimer] = "setitimer";
1782 #endif
1783 #if defined (SYS_getitimer)
1784 syscall_table[SYS_getitimer] = "getitimer";
1785 #endif
1786 #if defined (SYS_gettimeofday)
1787 syscall_table[SYS_gettimeofday] = "gettimeofday";
1788 #endif
1789 #if defined (SYS_settimeofday)
1790 syscall_table[SYS_settimeofday] = "settimeofday";
1791 #endif
1792 #if defined (SYS_lwp_create)
1793 syscall_table[SYS_lwp_create] = "_lwp_create";
1794 #endif
1795 #if defined (SYS_lwp_exit)
1796 syscall_table[SYS_lwp_exit] = "_lwp_exit";
1797 #endif
1798 #if defined (SYS_lwp_wait)
1799 syscall_table[SYS_lwp_wait] = "_lwp_wait";
1800 #endif
1801 #if defined (SYS_lwp_self)
1802 syscall_table[SYS_lwp_self] = "_lwp_self";
1803 #endif
1804 #if defined (SYS_lwp_info)
1805 syscall_table[SYS_lwp_info] = "_lwp_info";
1806 #endif
1807 #if defined (SYS_lwp_private)
1808 syscall_table[SYS_lwp_private] = "_lwp_private";
1809 #endif
1810 #if defined (SYS_processor_bind)
1811 syscall_table[SYS_processor_bind] = "processor_bind";
1812 #endif
1813 #if defined (SYS_processor_exbind)
1814 syscall_table[SYS_processor_exbind] = "processor_exbind";
1815 #endif
1816 #if defined (SYS_prepblock)
1817 syscall_table[SYS_prepblock] = "prepblock";
1818 #endif
1819 #if defined (SYS_block)
1820 syscall_table[SYS_block] = "block";
1821 #endif
1822 #if defined (SYS_rdblock)
1823 syscall_table[SYS_rdblock] = "rdblock";
1824 #endif
1825 #if defined (SYS_unblock)
1826 syscall_table[SYS_unblock] = "unblock";
1827 #endif
1828 #if defined (SYS_cancelblock)
1829 syscall_table[SYS_cancelblock] = "cancelblock";
1830 #endif
1831 #if defined (SYS_pread)
1832 syscall_table[SYS_pread] = "pread";
1833 #endif
1834 #if defined (SYS_pwrite)
1835 syscall_table[SYS_pwrite] = "pwrite";
1836 #endif
1837 #if defined (SYS_truncate)
1838 syscall_table[SYS_truncate] = "truncate";
1839 #endif
1840 #if defined (SYS_ftruncate)
1841 syscall_table[SYS_ftruncate] = "ftruncate";
1842 #endif
1843 #if defined (SYS_lwp_kill)
1844 syscall_table[SYS_lwp_kill] = "_lwp_kill";
1845 #endif
1846 #if defined (SYS_sigwait)
1847 syscall_table[SYS_sigwait] = "sigwait";
1848 #endif
1849 #if defined (SYS_fork1)
1850 syscall_table[SYS_fork1] = "fork1";
1851 #endif
1852 #if defined (SYS_forkall)
1853 syscall_table[SYS_forkall] = "forkall";
1854 #endif
1855 #if defined (SYS_modload)
1856 syscall_table[SYS_modload] = "modload";
1857 #endif
1858 #if defined (SYS_moduload)
1859 syscall_table[SYS_moduload] = "moduload";
1860 #endif
1861 #if defined (SYS_modpath)
1862 syscall_table[SYS_modpath] = "modpath";
1863 #endif
1864 #if defined (SYS_modstat)
1865 syscall_table[SYS_modstat] = "modstat";
1866 #endif
1867 #if defined (SYS_modadm)
1868 syscall_table[SYS_modadm] = "modadm";
1869 #endif
1870 #if defined (SYS_getksym)
1871 syscall_table[SYS_getksym] = "getksym";
1872 #endif
1873 #if defined (SYS_lwp_suspend)
1874 syscall_table[SYS_lwp_suspend] = "_lwp_suspend";
1875 #endif
1876 #if defined (SYS_lwp_continue)
1877 syscall_table[SYS_lwp_continue] = "_lwp_continue";
1878 #endif
1879 #if defined (SYS_priocntllst)
1880 syscall_table[SYS_priocntllst] = "priocntllst";
1881 #endif
1882 #if defined (SYS_sleep)
1883 syscall_table[SYS_sleep] = "sleep";
1884 #endif
1885 #if defined (SYS_lwp_sema_wait)
1886 syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait";
1887 #endif
1888 #if defined (SYS_lwp_sema_post)
1889 syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post";
1890 #endif
1891 #if defined (SYS_lwp_sema_trywait)
1892 syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait";
1893 #endif
1894 #if defined(SYS_fstatvfs64)
1895 syscall_table[SYS_fstatvfs64] = "fstatvfs64";
1896 #endif
1897 #if defined(SYS_statvfs64)
1898 syscall_table[SYS_statvfs64] = "statvfs64";
1899 #endif
1900 #if defined(SYS_ftruncate64)
1901 syscall_table[SYS_ftruncate64] = "ftruncate64";
1902 #endif
1903 #if defined(SYS_truncate64)
1904 syscall_table[SYS_truncate64] = "truncate64";
1905 #endif
1906 #if defined(SYS_getrlimit64)
1907 syscall_table[SYS_getrlimit64] = "getrlimit64";
1908 #endif
1909 #if defined(SYS_setrlimit64)
1910 syscall_table[SYS_setrlimit64] = "setrlimit64";
1911 #endif
1912 #if defined(SYS_lseek64)
1913 syscall_table[SYS_lseek64] = "lseek64";
1914 #endif
1915 #if defined(SYS_mmap64)
1916 syscall_table[SYS_mmap64] = "mmap64";
1917 #endif
1918 #if defined(SYS_pread64)
1919 syscall_table[SYS_pread64] = "pread64";
1920 #endif
1921 #if defined(SYS_creat64)
1922 syscall_table[SYS_creat64] = "creat64";
1923 #endif
1924 #if defined(SYS_dshmsys)
1925 syscall_table[SYS_dshmsys] = "dshmsys";
1926 #endif
1927 #if defined(SYS_invlpg)
1928 syscall_table[SYS_invlpg] = "invlpg";
1929 #endif
1930 #if defined(SYS_cg_ids)
1931 syscall_table[SYS_cg_ids] = "cg_ids";
1932 #endif
1933 #if defined(SYS_cg_processors)
1934 syscall_table[SYS_cg_processors] = "cg_processors";
1935 #endif
1936 #if defined(SYS_cg_info)
1937 syscall_table[SYS_cg_info] = "cg_info";
1938 #endif
1939 #if defined(SYS_cg_bind)
1940 syscall_table[SYS_cg_bind] = "cg_bind";
1941 #endif
1942 #if defined(SYS_cg_current)
1943 syscall_table[SYS_cg_current] = "cg_current";
1944 #endif
1945 #if defined(SYS_cg_memloc)
1946 syscall_table[SYS_cg_memloc] = "cg_memloc";
1947 #endif
1948 }
1949
1950 /*
1951
1952 LOCAL FUNCTION
1953
1954 procfs_kill_inferior - kill any current inferior
1955
1956 SYNOPSIS
1957
1958 void procfs_kill_inferior (void)
1959
1960 DESCRIPTION
1961
1962 Kill any current inferior.
1963
1964 NOTES
1965
1966 Kills even attached inferiors. Presumably the user has already
1967 been prompted that the inferior is an attached one rather than
1968 one started by gdb. (FIXME?)
1969
1970 */
1971
1972 static void
1973 procfs_kill_inferior ()
1974 {
1975 target_mourn_inferior ();
1976 }
1977
1978 /*
1979
1980 LOCAL FUNCTION
1981
1982 unconditionally_kill_inferior - terminate the inferior
1983
1984 SYNOPSIS
1985
1986 static void unconditionally_kill_inferior (struct procinfo *)
1987
1988 DESCRIPTION
1989
1990 Kill the specified inferior.
1991
1992 NOTE
1993
1994 A possibly useful enhancement would be to first try sending
1995 the inferior a terminate signal, politely asking it to commit
1996 suicide, before we murder it (we could call that
1997 politely_kill_inferior()).
1998
1999 */
2000
2001 static void
2002 unconditionally_kill_inferior (pi)
2003 struct procinfo *pi;
2004 {
2005 int ppid;
2006
2007 ppid = pi->prstatus.pr_ppid;
2008
2009 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
2010 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
2011 before the PIOCKILL, otherwise it might generate a corrupted core
2012 file for the inferior. */
2013 ioctl (pi->ctl_fd, PIOCSSIG, NULL);
2014 #endif
2015 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
2016 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
2017 to kill the inferior, otherwise it might remain stopped with a
2018 pending SIGKILL.
2019 We do not check the result of the PIOCSSIG, the inferior might have
2020 died already. */
2021 {
2022 struct siginfo newsiginfo;
2023
2024 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2025 newsiginfo.si_signo = SIGKILL;
2026 newsiginfo.si_code = 0;
2027 newsiginfo.si_errno = 0;
2028 newsiginfo.si_pid = getpid ();
2029 newsiginfo.si_uid = getuid ();
2030 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
2031 }
2032 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
2033 procfs_write_pckill (pi);
2034 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
2035
2036 close_proc_file (pi);
2037
2038 /* Only wait() for our direct children. Our grandchildren zombies are killed
2039 by the death of their parents. */
2040
2041 if (ppid == getpid ())
2042 wait ((int *) 0);
2043 }
2044
2045 /*
2046
2047 LOCAL FUNCTION
2048
2049 procfs_xfer_memory -- copy data to or from inferior memory space
2050
2051 SYNOPSIS
2052
2053 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
2054 int dowrite, struct target_ops target)
2055
2056 DESCRIPTION
2057
2058 Copy LEN bytes to/from inferior's memory starting at MEMADDR
2059 from/to debugger memory starting at MYADDR. Copy from inferior
2060 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
2061
2062 Returns the length copied, which is either the LEN argument or
2063 zero. This xfer function does not do partial moves, since procfs_ops
2064 doesn't allow memory operations to cross below us in the target stack
2065 anyway.
2066
2067 NOTES
2068
2069 The /proc interface makes this an almost trivial task.
2070 */
2071
2072 static int
2073 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
2074 CORE_ADDR memaddr;
2075 char *myaddr;
2076 int len;
2077 int dowrite;
2078 struct target_ops *target; /* ignored */
2079 {
2080 int nbytes = 0;
2081 struct procinfo *pi;
2082
2083 pi = current_procinfo;
2084
2085 if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
2086 {
2087 if (dowrite)
2088 {
2089 nbytes = write (pi->as_fd, myaddr, len);
2090 }
2091 else
2092 {
2093 nbytes = read (pi->as_fd, myaddr, len);
2094 }
2095 if (nbytes < 0)
2096 {
2097 nbytes = 0;
2098 }
2099 }
2100 return (nbytes);
2101 }
2102
2103 /*
2104
2105 LOCAL FUNCTION
2106
2107 procfs_store_registers -- copy register values back to inferior
2108
2109 SYNOPSIS
2110
2111 void procfs_store_registers (int regno)
2112
2113 DESCRIPTION
2114
2115 Store our current register values back into the inferior. If
2116 REGNO is -1 then store all the register, otherwise store just
2117 the value specified by REGNO.
2118
2119 NOTES
2120
2121 If we are storing only a single register, we first have to get all
2122 the current values from the process, overwrite the desired register
2123 in the gregset with the one we want from gdb's registers, and then
2124 send the whole set back to the process. For writing all the
2125 registers, all we have to do is generate the gregset and send it to
2126 the process.
2127
2128 Also note that the process has to be stopped on an event of interest
2129 for this to work, which basically means that it has to have been
2130 run under the control of one of the other /proc ioctl calls and not
2131 ptrace. Since we don't use ptrace anyway, we don't worry about this
2132 fine point, but it is worth noting for future reference.
2133
2134 Gdb is confused about what this function is supposed to return.
2135 Some versions return a value, others return nothing. Some are
2136 declared to return a value and actually return nothing. Gdb ignores
2137 anything returned. (FIXME)
2138
2139 */
2140
2141 static void
2142 procfs_store_registers (regno)
2143 int regno;
2144 {
2145 struct procinfo *pi;
2146 #ifdef PROCFS_USE_READ_WRITE
2147 struct greg_ctl greg;
2148 struct fpreg_ctl fpreg;
2149 #endif
2150
2151 pi = current_procinfo;
2152
2153 #ifdef PROCFS_USE_READ_WRITE
2154 if (regno != -1)
2155 {
2156 procfs_read_status (pi);
2157 memcpy ((char *) &greg.gregset,
2158 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs,
2159 sizeof (gdb_gregset_t));
2160 }
2161 fill_gregset (&greg.gregset, regno);
2162 greg.cmd = PCSREG;
2163 write (pi->ctl_fd, &greg, sizeof (greg));
2164 #else /* PROCFS_USE_READ_WRITE */
2165 if (regno != -1)
2166 {
2167 ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset);
2168 }
2169 fill_gregset (&pi->gregset.gregset, regno);
2170 ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset);
2171 #endif /* PROCFS_USE_READ_WRITE */
2172
2173 #if defined (FP0_REGNUM)
2174
2175 /* Now repeat everything using the floating point register set, if the
2176 target has floating point hardware. Since we ignore the returned value,
2177 we'll never know whether it worked or not anyway. */
2178
2179 #ifdef PROCFS_USE_READ_WRITE
2180 if (regno != -1)
2181 {
2182 procfs_read_status (pi);
2183 memcpy ((char *) &fpreg.fpregset,
2184 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs,
2185 sizeof (gdb_fpregset_t));
2186 }
2187 fill_fpregset (&fpreg.fpregset, regno);
2188 fpreg.cmd = PCSFPREG;
2189 write (pi->ctl_fd, &fpreg, sizeof (fpreg));
2190 #else /* PROCFS_USE_READ_WRITE */
2191 if (regno != -1)
2192 {
2193 ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset);
2194 }
2195 fill_fpregset (&pi->fpregset.fpregset, regno);
2196 ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset);
2197 #endif /* PROCFS_USE_READ_WRITE */
2198
2199 #endif /* FP0_REGNUM */
2200
2201 }
2202
2203 /*
2204
2205 LOCAL FUNCTION
2206
2207 init_procinfo - setup a procinfo struct and connect it to a process
2208
2209 SYNOPSIS
2210
2211 struct procinfo * init_procinfo (int pid)
2212
2213 DESCRIPTION
2214
2215 Allocate a procinfo structure, open the /proc file and then set up the
2216 set of signals and faults that are to be traced. Returns a pointer to
2217 the new procinfo structure.
2218
2219 NOTES
2220
2221 If proc_init_failed ever gets called, control returns to the command
2222 processing loop via the standard error handling code.
2223
2224 */
2225
2226 static struct procinfo *
2227 init_procinfo (pid, kill)
2228 int pid;
2229 int kill;
2230 {
2231 struct procinfo *pi = (struct procinfo *)
2232 xmalloc (sizeof (struct procinfo));
2233 #ifdef UNIXWARE
2234 struct sig_ctl sctl;
2235 #endif /* UNIXWARE */
2236
2237 memset ((char *) pi, 0, sizeof (*pi));
2238 if (!open_proc_file (pid, pi, O_RDWR, 1))
2239 proc_init_failed (pi, "can't open process file", kill);
2240
2241 /* open_proc_file may modify pid. */
2242
2243 pid = pi->pid;
2244
2245 /* Add new process to process info list */
2246
2247 pi->next = procinfo_list;
2248 procinfo_list = pi;
2249
2250 add_fd (pi); /* Add to list for poll/select */
2251
2252 /* Remember some things about the inferior that we will, or might, change
2253 so that we can restore them when we detach. */
2254 #ifdef UNIXWARE
2255 memcpy ((char *) &pi->saved_trace.sigset,
2256 (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
2257 memcpy ((char *) &pi->saved_fltset.fltset,
2258 (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
2259 memcpy ((char *) &pi->saved_entryset.sysset,
2260 (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
2261 memcpy ((char *) &pi->saved_exitset.sysset,
2262 (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
2263
2264 /* Set up trace and fault sets, as gdb expects them. */
2265
2266 prfillset (&sctl.sigset);
2267 notice_signals (pi, &sctl);
2268 #else /* ! UNIXWARE */
2269 ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
2270 ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
2271 ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
2272 ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
2273 ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
2274
2275 /* Set up trace and fault sets, as gdb expects them. */
2276
2277 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
2278 prfillset (&pi->prrun.pr_trace);
2279 procfs_notice_signals (pid);
2280 #endif /* UNIXWARE */
2281
2282 if (!procfs_read_status (pi))
2283 proc_init_failed (pi, "procfs_read_status failed", kill);
2284
2285 return pi;
2286 }
2287
2288 /*
2289
2290 LOCAL FUNCTION
2291
2292 create_procinfo - initialize access to a /proc entry
2293
2294 SYNOPSIS
2295
2296 struct procinfo * create_procinfo (int pid)
2297
2298 DESCRIPTION
2299
2300 Allocate a procinfo structure, open the /proc file and then set up the
2301 set of signals and faults that are to be traced. Returns a pointer to
2302 the new procinfo structure.
2303
2304 NOTES
2305
2306 If proc_init_failed ever gets called, control returns to the command
2307 processing loop via the standard error handling code.
2308
2309 */
2310
2311 static struct procinfo *
2312 create_procinfo (pid)
2313 int pid;
2314 {
2315 struct procinfo *pi;
2316 #ifdef PROCFS_USE_READ_WRITE
2317 struct flt_ctl fctl;
2318 #endif
2319
2320 pi = find_procinfo (pid, 1);
2321 if (pi != NULL)
2322 return pi; /* All done! It already exists */
2323
2324 pi = init_procinfo (pid, 1);
2325
2326 #ifndef UNIXWARE
2327 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2328 already stopped, even if they all have PR_ASYNC set. */
2329 if (!(pi->prstatus.pr_flags & PR_STOPPED))
2330 #endif
2331 if (!procfs_write_pcwstop (pi))
2332 proc_init_failed (pi, "procfs_write_pcwstop failed", 1);
2333
2334 #ifdef PROCFS_USE_READ_WRITE
2335 fctl.cmd = PCSFAULT;
2336 prfillset (&fctl.fltset);
2337 prdelset (&fctl.fltset, FLTPAGE);
2338
2339 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
2340 proc_init_failed (pi, "PCSFAULT failed", 1);
2341 #else
2342 prfillset (&pi->prrun.pr_fault);
2343 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2344 #ifdef PROCFS_DONT_TRACE_FAULTS
2345 premptyset (&pi->prrun.pr_fault);
2346 #endif
2347 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
2348 proc_init_failed (pi, "PIOCSFAULT failed", 1);
2349 #endif
2350
2351 return pi;
2352 }
2353
2354 /*
2355
2356 LOCAL FUNCTION
2357
2358 procfs_exit_handler - handle entry into the _exit syscall
2359
2360 SYNOPSIS
2361
2362 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2363
2364 DESCRIPTION
2365
2366 This routine is called when an inferior process enters the _exit()
2367 system call. It continues the process, and then collects the exit
2368 status and pid which are returned in *statvalp and *rtnvalp. After
2369 that it returns non-zero to indicate that procfs_wait should wake up.
2370
2371 NOTES
2372 There is probably a better way to do this.
2373
2374 */
2375
2376 static int
2377 procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2378 struct procinfo *pi;
2379 int syscall_num;
2380 int why;
2381 int *rtnvalp;
2382 int *statvalp;
2383 {
2384 struct procinfo *temp_pi, *next_pi;
2385 #if defined (UNIXWARE) || defined (PROCFS_USE_READ_WRITE)
2386 struct proc_ctl pctl;
2387 #endif
2388
2389 #ifdef UNIXWARE
2390 pctl.cmd = PCRUN;
2391 pctl.data = PRCFAULT;
2392 #else
2393 pi->prrun.pr_flags = PRCFAULT;
2394 #endif
2395
2396 #ifdef PROCFS_USE_READ_WRITE
2397 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
2398 #else
2399 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2400 #endif
2401 perror_with_name (pi->pathname);
2402
2403 if (attach_flag)
2404 {
2405 /* Claim it exited (don't call wait). */
2406 if (info_verbose)
2407 printf_filtered ("(attached process has exited)\n");
2408 *statvalp = 0;
2409 *rtnvalp = inferior_pid;
2410 }
2411 else
2412 {
2413 *rtnvalp = wait (statvalp);
2414 if (*rtnvalp >= 0)
2415 *rtnvalp = pi->pid;
2416 }
2417
2418 /* Close ALL open proc file handles,
2419 except the one that called SYS_exit. */
2420 for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi)
2421 {
2422 next_pi = temp_pi->next;
2423 if (temp_pi == pi)
2424 continue; /* Handled below */
2425 close_proc_file (temp_pi);
2426 }
2427 return 1;
2428 }
2429
2430 /*
2431
2432 LOCAL FUNCTION
2433
2434 procfs_exec_handler - handle exit from the exec family of syscalls
2435
2436 SYNOPSIS
2437
2438 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2439
2440 DESCRIPTION
2441
2442 This routine is called when an inferior process is about to finish any
2443 of the exec() family of system calls. It pretends that we got a
2444 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2445 to tell procfs_wait to wake up.
2446
2447 NOTES
2448 This need for compatibility with ptrace is questionable. In the
2449 future, it shouldn't be necessary.
2450
2451 */
2452
2453 static int
2454 procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2455 struct procinfo *pi;
2456 int syscall_num;
2457 int why;
2458 int *rtnvalp;
2459 int *statvalp;
2460 {
2461 *statvalp = (SIGTRAP << 8) | 0177;
2462
2463 return 1;
2464 }
2465
2466 #if defined(SYS_sproc) && !defined(UNIXWARE)
2467 /* IRIX lwp creation system call */
2468
2469 /*
2470
2471 LOCAL FUNCTION
2472
2473 procfs_sproc_handler - handle exit from the sproc syscall
2474
2475 SYNOPSIS
2476
2477 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2478
2479 DESCRIPTION
2480
2481 This routine is called when an inferior process is about to finish an
2482 sproc() system call. This is the system call that IRIX uses to create
2483 a lightweight process. When the target process gets this event, we can
2484 look at rval1 to find the new child processes ID, and create a new
2485 procinfo struct from that.
2486
2487 After that, it pretends that we got a SIGTRAP, and returns non-zero
2488 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2489 woken up, sees the new process and continues it.
2490
2491 NOTES
2492 We actually never see the child exiting from sproc because we will
2493 shortly stop the child with PIOCSTOP, which is then registered as the
2494 event of interest.
2495 */
2496
2497 static int
2498 procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2499 struct procinfo *pi;
2500 int syscall_num;
2501 int why;
2502 int *rtnvalp;
2503 int *statvalp;
2504 {
2505 /* We've just detected the completion of an sproc system call. Now we need to
2506 setup a procinfo struct for this thread, and notify the thread system of the
2507 new arrival. */
2508
2509 /* If sproc failed, then nothing interesting happened. Continue the process
2510 and go back to sleep. */
2511
2512 if (pi->prstatus.pr_errno != 0)
2513 {
2514 pi->prrun.pr_flags &= PRSTEP;
2515 pi->prrun.pr_flags |= PRCFAULT;
2516
2517 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2518 perror_with_name (pi->pathname);
2519
2520 return 0;
2521 }
2522
2523 /* At this point, the new thread is stopped at it's first instruction, and
2524 the parent is stopped at the exit from sproc. */
2525
2526 /* Notify the caller of the arrival of a new thread. */
2527 create_procinfo (pi->prstatus.pr_rval1);
2528
2529 *rtnvalp = pi->prstatus.pr_rval1;
2530 *statvalp = (SIGTRAP << 8) | 0177;
2531
2532 return 1;
2533 }
2534
2535 /*
2536
2537 LOCAL FUNCTION
2538
2539 procfs_fork_handler - handle exit from the fork syscall
2540
2541 SYNOPSIS
2542
2543 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2544
2545 DESCRIPTION
2546
2547 This routine is called when an inferior process is about to finish a
2548 fork() system call. We will open up the new process, and then close
2549 it, which releases it from the clutches of the debugger.
2550
2551 After that, we continue the target process as though nothing had
2552 happened.
2553
2554 NOTES
2555 This is necessary for IRIX because we have to set PR_FORK in order
2556 to catch the creation of lwps (via sproc()). When an actual fork
2557 occurs, it becomes necessary to reset the forks debugger flags and
2558 continue it because we can't hack multiple processes yet.
2559 */
2560
2561 static int
2562 procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2563 struct procinfo *pi;
2564 int syscall_num;
2565 int why;
2566 int *rtnvalp;
2567 int *statvalp;
2568 {
2569 struct procinfo *pitemp;
2570
2571 /* At this point, we've detected the completion of a fork (or vfork) call in
2572 our child. The grandchild is also stopped because we set inherit-on-fork
2573 earlier. (Note that nobody has the grandchilds' /proc file open at this
2574 point.) We will release the grandchild from the debugger by opening it's
2575 /proc file and then closing it. Since run-on-last-close is set, the
2576 grandchild continues on its' merry way. */
2577
2578
2579 pitemp = create_procinfo (pi->prstatus.pr_rval1);
2580 if (pitemp)
2581 close_proc_file (pitemp);
2582
2583 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2584 perror_with_name (pi->pathname);
2585
2586 return 0;
2587 }
2588 #endif /* SYS_sproc && !UNIXWARE */
2589
2590 /*
2591
2592 LOCAL FUNCTION
2593
2594 procfs_set_inferior_syscall_traps - setup the syscall traps
2595
2596 SYNOPSIS
2597
2598 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2599
2600 DESCRIPTION
2601
2602 Called for each "procinfo" (process, thread, or LWP) in the
2603 inferior, to register for notification of and handlers for
2604 syscall traps in the inferior.
2605
2606 */
2607
2608 static void
2609 procfs_set_inferior_syscall_traps (pip)
2610 struct procinfo *pip;
2611 {
2612 procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
2613 procfs_exit_handler);
2614
2615 #ifndef PRFS_STOPEXEC
2616 #ifdef SYS_exec
2617 procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
2618 procfs_exec_handler);
2619 #endif
2620 #ifdef SYS_execv
2621 procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT,
2622 procfs_exec_handler);
2623 #endif
2624 #ifdef SYS_execve
2625 procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
2626 procfs_exec_handler);
2627 #endif
2628 #endif /* PRFS_STOPEXEC */
2629
2630 /* Setup traps on exit from sproc() */
2631
2632 #ifdef SYS_sproc
2633 procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT,
2634 procfs_sproc_handler);
2635 procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT,
2636 procfs_fork_handler);
2637 #ifdef SYS_vfork
2638 procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT,
2639 procfs_fork_handler);
2640 #endif
2641 /* Turn on inherit-on-fork flag so that all children of the target process
2642 start with tracing flags set. This allows us to trap lwp creation. Note
2643 that we also have to trap on fork and vfork in order to disable all tracing
2644 in the targets child processes. */
2645
2646 modify_inherit_on_fork_flag (pip->ctl_fd, 1);
2647 #endif
2648
2649 #ifdef SYS_lwp_create
2650 procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
2651 procfs_lwp_creation_handler);
2652 #endif
2653 }
2654
2655 /*
2656
2657 LOCAL FUNCTION
2658
2659 procfs_init_inferior - initialize target vector and access to a
2660 /proc entry
2661
2662 SYNOPSIS
2663
2664 void procfs_init_inferior (int pid)
2665
2666 DESCRIPTION
2667
2668 When gdb starts an inferior, this function is called in the parent
2669 process immediately after the fork. It waits for the child to stop
2670 on the return from the exec system call (the child itself takes care
2671 of ensuring that this is set up), then sets up the set of signals
2672 and faults that are to be traced. Returns the pid, which may have had
2673 the thread-id added to it.
2674
2675 NOTES
2676
2677 If proc_init_failed ever gets called, control returns to the command
2678 processing loop via the standard error handling code.
2679
2680 */
2681
2682 static void
2683 procfs_init_inferior (pid)
2684 int pid;
2685 {
2686 struct procinfo *pip;
2687
2688 push_target (&procfs_ops);
2689
2690 pip = create_procinfo (pid);
2691
2692 procfs_set_inferior_syscall_traps (pip);
2693
2694 /* create_procinfo may change the pid, so we have to update inferior_pid
2695 here before calling other gdb routines that need the right pid. */
2696
2697 pid = pip->pid;
2698 inferior_pid = pid;
2699
2700 add_thread (pip->pid); /* Setup initial thread */
2701
2702 #ifdef START_INFERIOR_TRAPS_EXPECTED
2703 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
2704 #else
2705 /* One trap to exec the shell, one to exec the program being debugged. */
2706 startup_inferior (2);
2707 #endif
2708 }
2709
2710 /*
2711
2712 GLOBAL FUNCTION
2713
2714 procfs_notice_signals
2715
2716 SYNOPSIS
2717
2718 static void procfs_notice_signals (int pid);
2719
2720 DESCRIPTION
2721
2722 When the user changes the state of gdb's signal handling via the
2723 "handle" command, this function gets called to see if any change
2724 in the /proc interface is required. It is also called internally
2725 by other /proc interface functions to initialize the state of
2726 the traced signal set.
2727
2728 One thing it does is that signals for which the state is "nostop",
2729 "noprint", and "pass", have their trace bits reset in the pr_trace
2730 field, so that they are no longer traced. This allows them to be
2731 delivered directly to the inferior without the debugger ever being
2732 involved.
2733 */
2734
2735 static void
2736 procfs_notice_signals (pid)
2737 int pid;
2738 {
2739 struct procinfo *pi;
2740 struct sig_ctl sctl;
2741
2742 pi = find_procinfo (pid, 0);
2743
2744 #ifndef HAVE_PRRUN_T
2745 premptyset (&sctl.sigset);
2746 #else
2747 sctl.sigset = pi->prrun.pr_trace;
2748 #endif
2749
2750 notice_signals (pi, &sctl);
2751
2752 #ifdef HAVE_PRRUN_T
2753 pi->prrun.pr_trace = sctl.sigset;
2754 #endif
2755 }
2756
2757 static void
2758 notice_signals (pi, sctl)
2759 struct procinfo *pi;
2760 struct sig_ctl *sctl;
2761 {
2762 int signo;
2763
2764 for (signo = 0; signo < NSIG; signo++)
2765 {
2766 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
2767 signal_print_state (target_signal_from_host (signo)) == 0 &&
2768 signal_pass_state (target_signal_from_host (signo)) == 1)
2769 {
2770 prdelset (&sctl->sigset, signo);
2771 }
2772 else
2773 {
2774 praddset (&sctl->sigset, signo);
2775 }
2776 }
2777 #ifdef PROCFS_USE_READ_WRITE
2778 sctl->cmd = PCSTRACE;
2779 if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0)
2780 #else
2781 if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset))
2782 #endif
2783 {
2784 print_sys_errmsg ("PIOCSTRACE failed", errno);
2785 }
2786 }
2787
2788 /*
2789
2790 LOCAL FUNCTION
2791
2792 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2793
2794 SYNOPSIS
2795
2796 void proc_set_exec_trap (void)
2797
2798 DESCRIPTION
2799
2800 This function is called in the child process when starting up
2801 an inferior, prior to doing the exec of the actual inferior.
2802 It sets the child process's exitset to make exit from the exec
2803 system call an event of interest to stop on, and then simply
2804 returns. The child does the exec, the system call returns, and
2805 the child stops at the first instruction, ready for the gdb
2806 parent process to take control of it.
2807
2808 NOTE
2809
2810 We need to use all local variables since the child may be sharing
2811 it's data space with the parent, if vfork was used rather than
2812 fork.
2813
2814 Also note that we want to turn off the inherit-on-fork flag in
2815 the child process so that any grand-children start with all
2816 tracing flags cleared.
2817 */
2818
2819 static void
2820 proc_set_exec_trap ()
2821 {
2822 struct sys_ctl exitset;
2823 struct sys_ctl entryset;
2824 char procname[MAX_PROC_NAME_SIZE];
2825 int fd;
2826
2827 sprintf (procname, CTL_PROC_NAME_FMT, getpid ());
2828 #ifdef UNIXWARE
2829 if ((fd = open (procname, O_WRONLY)) < 0)
2830 #else
2831 if ((fd = open (procname, O_RDWR)) < 0)
2832 #endif
2833 {
2834 perror (procname);
2835 gdb_flush (gdb_stderr);
2836 _exit (127);
2837 }
2838 premptyset (&exitset.sysset);
2839 premptyset (&entryset.sysset);
2840
2841 #ifdef PRFS_STOPEXEC
2842 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2843 exits from exec system calls because of the user level loader. */
2844 {
2845 int prfs_flags;
2846
2847 if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
2848 {
2849 perror (procname);
2850 gdb_flush (gdb_stderr);
2851 _exit (127);
2852 }
2853 prfs_flags |= PRFS_STOPEXEC;
2854 if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
2855 {
2856 perror (procname);
2857 gdb_flush (gdb_stderr);
2858 _exit (127);
2859 }
2860 }
2861 #else /* PRFS_STOPEXEC */
2862 /* GW: Rationale...
2863 Not all systems with /proc have all the exec* syscalls with the same
2864 names. On the SGI, for example, there is no SYS_exec, but there
2865 *is* a SYS_execv. So, we try to account for that. */
2866
2867 #ifdef SYS_exec
2868 praddset (&exitset.sysset, SYS_exec);
2869 #endif
2870 #ifdef SYS_execve
2871 praddset (&exitset.sysset, SYS_execve);
2872 #endif
2873 #ifdef SYS_execv
2874 praddset (&exitset.sysset, SYS_execv);
2875 #endif
2876
2877 #ifdef PROCFS_USE_READ_WRITE
2878 exitset.cmd = PCSEXIT;
2879 if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0)
2880 #else
2881 if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0)
2882 #endif
2883 {
2884 perror (procname);
2885 gdb_flush (gdb_stderr);
2886 _exit (127);
2887 }
2888 #endif /* PRFS_STOPEXEC */
2889
2890 praddset (&entryset.sysset, SYS_exit);
2891
2892 #ifdef PROCFS_USE_READ_WRITE
2893 entryset.cmd = PCSENTRY;
2894 if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0)
2895 #else
2896 if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0)
2897 #endif
2898 {
2899 perror (procname);
2900 gdb_flush (gdb_stderr);
2901 _exit (126);
2902 }
2903
2904 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2905 start with tracing flags cleared. */
2906
2907 modify_inherit_on_fork_flag (fd, 0);
2908
2909 /* Turn on run-on-last-close flag so that this process will not hang
2910 if GDB goes away for some reason. */
2911
2912 modify_run_on_last_close_flag (fd, 1);
2913
2914 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2915 /* NOTE: revisit when doing thread support for UW */
2916 #ifdef PR_ASYNC
2917 {
2918 long pr_flags;
2919 #ifdef PROCFS_USE_READ_WRITE
2920 struct proc_ctl pctl;
2921 #endif
2922
2923 /* Solaris needs this to make procfs treat all threads seperately. Without
2924 this, all threads halt whenever something happens to any thread. Since
2925 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2926
2927 pr_flags = PR_ASYNC;
2928 #ifdef PROCFS_USE_READ_WRITE
2929 pctl.cmd = PCSET;
2930 pctl.data = PR_FORK | PR_ASYNC;
2931 write (fd, (char *) &pctl, sizeof (struct proc_ctl));
2932 #else
2933 ioctl (fd, PIOCSET, &pr_flags);
2934 #endif
2935 }
2936 #endif /* PR_ASYNC */
2937 #endif /* !UNIXWARE */
2938 }
2939
2940 /*
2941
2942 GLOBAL FUNCTION
2943
2944 proc_iterate_over_mappings -- call function for every mapped space
2945
2946 SYNOPSIS
2947
2948 int proc_iterate_over_mappings (int (*func)())
2949
2950 DESCRIPTION
2951
2952 Given a pointer to a function, call that function for every
2953 mapped address space, passing it an open file descriptor for
2954 the file corresponding to that mapped address space (if any)
2955 and the base address of the mapped space. Quit when we hit
2956 the end of the mappings or the function returns nonzero.
2957 */
2958
2959 #ifdef UNIXWARE
2960 int
2961 proc_iterate_over_mappings (func)
2962 int (*func) PARAMS ((int, CORE_ADDR));
2963 {
2964 int nmap;
2965 int fd;
2966 int funcstat = 0;
2967 prmap_t *prmaps;
2968 prmap_t *prmap;
2969 struct procinfo *pi;
2970 struct stat sbuf;
2971
2972 pi = current_procinfo;
2973
2974 if (fstat (pi->map_fd, &sbuf) < 0)
2975 return 0;
2976
2977 nmap = sbuf.st_size / sizeof (prmap_t);
2978 prmaps = (prmap_t *) alloca (nmap * sizeof (prmap_t));
2979 if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) &&
2980 (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) ==
2981 (nmap * sizeof (prmap_t))))
2982 {
2983 int i = 0;
2984 for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i)
2985 {
2986 char name[sizeof ("/proc/1234567890/object") +
2987 sizeof (prmap->pr_mapname)];
2988 sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname);
2989 if ((fd = open (name, O_RDONLY)) == -1)
2990 {
2991 funcstat = 1;
2992 break;
2993 }
2994 funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
2995 close (fd);
2996 }
2997 }
2998 return (funcstat);
2999 }
3000 #else /* UNIXWARE */
3001 int
3002 proc_iterate_over_mappings (func)
3003 int (*func) PARAMS ((int, CORE_ADDR));
3004 {
3005 int nmap;
3006 int fd;
3007 int funcstat = 0;
3008 struct prmap *prmaps;
3009 struct prmap *prmap;
3010 struct procinfo *pi;
3011
3012 pi = current_procinfo;
3013
3014 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
3015 {
3016 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3017 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
3018 {
3019 for (prmap = prmaps; prmap->pr_size && funcstat == 0; ++prmap)
3020 {
3021 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap->pr_vaddr, 0);
3022 funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
3023 close (fd);
3024 }
3025 }
3026 }
3027 return (funcstat);
3028 }
3029 #endif /* UNIXWARE */
3030
3031 #if 0 /* Currently unused */
3032 /*
3033
3034 GLOBAL FUNCTION
3035
3036 proc_base_address -- find base address for segment containing address
3037
3038 SYNOPSIS
3039
3040 CORE_ADDR proc_base_address (CORE_ADDR addr)
3041
3042 DESCRIPTION
3043
3044 Given an address of a location in the inferior, find and return
3045 the base address of the mapped segment containing that address.
3046
3047 This is used for example, by the shared library support code,
3048 where we have the pc value for some location in the shared library
3049 where we are stopped, and need to know the base address of the
3050 segment containing that address.
3051 */
3052
3053 CORE_ADDR
3054 proc_base_address (addr)
3055 CORE_ADDR addr;
3056 {
3057 int nmap;
3058 struct prmap *prmaps;
3059 struct prmap *prmap;
3060 CORE_ADDR baseaddr = 0;
3061 struct procinfo *pi;
3062
3063 pi = current_procinfo;
3064
3065 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
3066 {
3067 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3068 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
3069 {
3070 for (prmap = prmaps; prmap->pr_size; ++prmap)
3071 {
3072 if ((prmap->pr_vaddr <= (caddr_t) addr) &&
3073 (prmap->pr_vaddr + prmap->pr_size > (caddr_t) addr))
3074 {
3075 baseaddr = (CORE_ADDR) prmap->pr_vaddr;
3076 break;
3077 }
3078 }
3079 }
3080 }
3081 return (baseaddr);
3082 }
3083
3084 #endif /* 0 */
3085
3086 #ifndef UNIXWARE
3087 /*
3088
3089 LOCAL FUNCTION
3090
3091 proc_address_to_fd -- return open fd for file mapped to address
3092
3093 SYNOPSIS
3094
3095 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
3096
3097 DESCRIPTION
3098
3099 Given an address in the current inferior's address space, use the
3100 /proc interface to find an open file descriptor for the file that
3101 this address was mapped in from. Return -1 if there is no current
3102 inferior. Print a warning message if there is an inferior but
3103 the address corresponds to no file (IE a bogus address).
3104
3105 */
3106
3107 static int
3108 proc_address_to_fd (pi, addr, complain)
3109 struct procinfo *pi;
3110 CORE_ADDR addr;
3111 int complain;
3112 {
3113 int fd = -1;
3114
3115 if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) & addr)) < 0)
3116 {
3117 if (complain)
3118 {
3119 print_sys_errmsg (pi->pathname, errno);
3120 warning ("can't find mapped file for address 0x%x", addr);
3121 }
3122 }
3123 return (fd);
3124 }
3125 #endif /* !UNIXWARE */
3126
3127 /* Attach to process PID, then initialize for debugging it
3128 and wait for the trace-trap that results from attaching. */
3129
3130 static void
3131 procfs_attach (args, from_tty)
3132 char *args;
3133 int from_tty;
3134 {
3135 char *exec_file;
3136 int pid;
3137
3138 if (!args)
3139 error_no_arg ("process-id to attach");
3140
3141 pid = atoi (args);
3142
3143 if (pid == getpid ()) /* Trying to masturbate? */
3144 error ("I refuse to debug myself!");
3145
3146 if (from_tty)
3147 {
3148 exec_file = (char *) get_exec_file (0);
3149
3150 if (exec_file)
3151 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
3152 else
3153 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
3154
3155 gdb_flush (gdb_stdout);
3156 }
3157
3158 inferior_pid = pid = do_attach (pid);
3159 push_target (&procfs_ops);
3160 }
3161
3162
3163 /* Take a program previously attached to and detaches it.
3164 The program resumes execution and will no longer stop
3165 on signals, etc. We'd better not have left any breakpoints
3166 in the program or it'll die when it hits one. For this
3167 to work, it may be necessary for the process to have been
3168 previously attached. It *might* work if the program was
3169 started via the normal ptrace (PTRACE_TRACEME). */
3170
3171 static void
3172 procfs_detach (args, from_tty)
3173 char *args;
3174 int from_tty;
3175 {
3176 int siggnal = 0;
3177
3178 if (from_tty)
3179 {
3180 char *exec_file = get_exec_file (0);
3181 if (exec_file == 0)
3182 exec_file = "";
3183 printf_unfiltered ("Detaching from program: %s %s\n",
3184 exec_file, target_pid_to_str (inferior_pid));
3185 gdb_flush (gdb_stdout);
3186 }
3187 if (args)
3188 siggnal = atoi (args);
3189
3190 do_detach (siggnal);
3191 inferior_pid = 0;
3192 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
3193 }
3194
3195 /* Get ready to modify the registers array. On machines which store
3196 individual registers, this doesn't need to do anything. On machines
3197 which store all the registers in one fell swoop, this makes sure
3198 that registers contains all the registers from the program being
3199 debugged. */
3200
3201 static void
3202 procfs_prepare_to_store ()
3203 {
3204 #ifdef CHILD_PREPARE_TO_STORE
3205 CHILD_PREPARE_TO_STORE ();
3206 #endif
3207 }
3208
3209 /* Print status information about what we're accessing. */
3210
3211 static void
3212 procfs_files_info (ignore)
3213 struct target_ops *ignore;
3214 {
3215 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3216 attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid));
3217 }
3218
3219 /* ARGSUSED */
3220 static void
3221 procfs_open (arg, from_tty)
3222 char *arg;
3223 int from_tty;
3224 {
3225 error ("Use the \"run\" command to start a Unix child process.");
3226 }
3227
3228 /*
3229
3230 LOCAL FUNCTION
3231
3232 do_attach -- attach to an already existing process
3233
3234 SYNOPSIS
3235
3236 int do_attach (int pid)
3237
3238 DESCRIPTION
3239
3240 Attach to an already existing process with the specified process
3241 id. If the process is not already stopped, query whether to
3242 stop it or not.
3243
3244 NOTES
3245
3246 The option of stopping at attach time is specific to the /proc
3247 versions of gdb. Versions using ptrace force the attachee
3248 to stop. (I have changed this version to do so, too. All you
3249 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3250
3251 */
3252
3253 static int
3254 do_attach (pid)
3255 int pid;
3256 {
3257 struct procinfo *pi;
3258 #ifdef PROCFS_USE_READ_WRITE
3259 struct flt_ctl fctl;
3260 #endif
3261 int nlwp, *lwps;
3262
3263 pi = init_procinfo (pid, 0);
3264
3265 #ifdef PIOCLWPIDS
3266 nlwp = pi->prstatus.pr_nlwp;
3267 lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
3268
3269 if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
3270 {
3271 print_sys_errmsg (pi->pathname, errno);
3272 error ("PIOCLWPIDS failed");
3273 }
3274 #else /* PIOCLWPIDS */
3275 nlwp = 1;
3276 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
3277 lwps[0] = 0;
3278 #endif
3279 for (; nlwp > 0; nlwp--, lwps++)
3280 {
3281 /* First one has already been created above. */
3282 if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
3283 pi = init_procinfo ((*lwps << 16) | pid, 0);
3284
3285 if (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP))
3286 {
3287 pi->was_stopped = 1;
3288 }
3289 else
3290 {
3291 pi->was_stopped = 0;
3292 if (1 || query ("Process is currently running, stop it? "))
3293 {
3294 #ifdef PROCFS_USE_READ_WRITE
3295 long cmd;
3296 #endif
3297 /* Make it run again when we close it. */
3298 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3299 #ifdef PROCFS_USE_READ_WRITE
3300 cmd = PCSTOP;
3301 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3302 #else
3303 if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
3304 #endif
3305 {
3306 print_sys_errmsg (pi->pathname, errno);
3307 close_proc_file (pi);
3308 error ("PIOCSTOP failed");
3309 }
3310 #ifdef UNIXWARE
3311 if (!procfs_read_status (pi))
3312 {
3313 print_sys_errmsg (pi->pathname, errno);
3314 close_proc_file (pi);
3315 error ("procfs_read_status failed");
3316 }
3317 #endif
3318 pi->nopass_next_sigstop = 1;
3319 }
3320 else
3321 {
3322 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3323 target_pid_to_str (pi->pid));
3324 }
3325 }
3326
3327 #ifdef PROCFS_USE_READ_WRITE
3328 fctl.cmd = PCSFAULT;
3329 prfillset (&fctl.fltset);
3330 prdelset (&fctl.fltset, FLTPAGE);
3331
3332 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
3333 print_sys_errmsg ("PCSFAULT failed", errno);
3334 #else /* PROCFS_USE_READ_WRITE */
3335 prfillset (&pi->prrun.pr_fault);
3336 prdelset (&pi->prrun.pr_fault, FLTPAGE);
3337 #ifdef PROCFS_DONT_TRACE_FAULTS
3338 premptyset (&pi->prrun.pr_fault);
3339 #endif
3340 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
3341 {
3342 print_sys_errmsg ("PIOCSFAULT failed", errno);
3343 }
3344 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
3345 {
3346 print_sys_errmsg ("PIOCSTRACE failed", errno);
3347 }
3348 add_thread (pi->pid);
3349 procfs_set_inferior_syscall_traps (pi);
3350 #endif /* PROCFS_USE_READ_WRITE */
3351 }
3352 attach_flag = 1;
3353 return (pi->pid);
3354 }
3355
3356 /*
3357
3358 LOCAL FUNCTION
3359
3360 do_detach -- detach from an attached-to process
3361
3362 SYNOPSIS
3363
3364 void do_detach (int signal)
3365
3366 DESCRIPTION
3367
3368 Detach from the current attachee.
3369
3370 If signal is non-zero, the attachee is started running again and sent
3371 the specified signal.
3372
3373 If signal is zero and the attachee was not already stopped when we
3374 attached to it, then we make it runnable again when we detach.
3375
3376 Otherwise, we query whether or not to make the attachee runnable
3377 again, since we may simply want to leave it in the state it was in
3378 when we attached.
3379
3380 We report any problems, but do not consider them errors, since we
3381 MUST detach even if some things don't seem to go right. This may not
3382 be the ideal situation. (FIXME).
3383 */
3384
3385 static void
3386 do_detach (signal)
3387 int signal;
3388 {
3389 struct procinfo *pi;
3390
3391 for (pi = procinfo_list; pi; pi = pi->next)
3392 {
3393 if (signal)
3394 {
3395 set_proc_siginfo (pi, signal);
3396 }
3397 #ifdef PROCFS_USE_READ_WRITE
3398 pi->saved_exitset.cmd = PCSEXIT;
3399 if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
3400 sizeof (struct sys_ctl)) < 0)
3401 #else
3402 if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
3403 #endif
3404 {
3405 print_sys_errmsg (pi->pathname, errno);
3406 printf_unfiltered ("PIOCSEXIT failed.\n");
3407 }
3408 #ifdef PROCFS_USE_READ_WRITE
3409 pi->saved_entryset.cmd = PCSENTRY;
3410 if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
3411 sizeof (struct sys_ctl)) < 0)
3412 #else
3413 if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
3414 #endif
3415 {
3416 print_sys_errmsg (pi->pathname, errno);
3417 printf_unfiltered ("PIOCSENTRY failed.\n");
3418 }
3419 #ifdef PROCFS_USE_READ_WRITE
3420 pi->saved_trace.cmd = PCSTRACE;
3421 if (write (pi->ctl_fd, (char *) &pi->saved_trace,
3422 sizeof (struct sig_ctl)) < 0)
3423 #else
3424 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
3425 #endif
3426 {
3427 print_sys_errmsg (pi->pathname, errno);
3428 printf_unfiltered ("PIOCSTRACE failed.\n");
3429 }
3430 #ifndef UNIXWARE
3431 if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
3432 {
3433 print_sys_errmsg (pi->pathname, errno);
3434 printf_unfiltered ("PIOSCHOLD failed.\n");
3435 }
3436 #endif
3437 #ifdef PROCFS_USE_READ_WRITE
3438 pi->saved_fltset.cmd = PCSFAULT;
3439 if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
3440 sizeof (struct flt_ctl)) < 0)
3441 #else
3442 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
3443 #endif
3444 {
3445 print_sys_errmsg (pi->pathname, errno);
3446 printf_unfiltered ("PIOCSFAULT failed.\n");
3447 }
3448 if (!procfs_read_status (pi))
3449 {
3450 print_sys_errmsg (pi->pathname, errno);
3451 printf_unfiltered ("procfs_read_status failed.\n");
3452 }
3453 else
3454 {
3455 if (signal
3456 || (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
3457 {
3458 #ifdef PROCFS_USE_READ_WRITE
3459 long cmd;
3460 #endif
3461
3462 if (signal || !pi->was_stopped ||
3463 query ("Was stopped when attached, make it runnable again? "))
3464 {
3465 /* Clear any pending signal if we want to detach without
3466 a signal. */
3467 if (signal == 0)
3468 set_proc_siginfo (pi, signal);
3469
3470 /* Clear any fault that might have stopped it. */
3471 #ifdef PROCFS_USE_READ_WRITE
3472 cmd = PCCFAULT;
3473 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3474 #else
3475 if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
3476 #endif
3477 {
3478 print_sys_errmsg (pi->pathname, errno);
3479 printf_unfiltered ("PIOCCFAULT failed.\n");
3480 }
3481
3482 /* Make it run again when we close it. */
3483
3484 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3485 }
3486 }
3487 }
3488 close_proc_file (pi);
3489 }
3490 attach_flag = 0;
3491 }
3492
3493 /* emulate wait() as much as possible.
3494 Wait for child to do something. Return pid of child, or -1 in case
3495 of error; store status in *OURSTATUS.
3496
3497 Not sure why we can't
3498 just use wait(), but it seems to have problems when applied to a
3499 process being controlled with the /proc interface.
3500
3501 We have a race problem here with no obvious solution. We need to let
3502 the inferior run until it stops on an event of interest, which means
3503 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3504 ioctl if the process is already stopped on something that is not an
3505 event of interest, or the call will hang indefinitely. Thus we first
3506 use PIOCSTATUS to see if the process is not stopped. If not, then we
3507 use PIOCWSTOP. But during the window between the two, if the process
3508 stops for any reason that is not an event of interest (such as a job
3509 control signal) then gdb will hang. One possible workaround is to set
3510 an alarm to wake up every minute of so and check to see if the process
3511 is still running, and if so, then reissue the PIOCWSTOP. But this is
3512 a real kludge, so has not been implemented. FIXME: investigate
3513 alternatives.
3514
3515 FIXME: Investigate why wait() seems to have problems with programs
3516 being control by /proc routines. */
3517 static int
3518 procfs_wait (pid, ourstatus)
3519 int pid;
3520 struct target_waitstatus *ourstatus;
3521 {
3522 short what;
3523 short why;
3524 int statval = 0;
3525 int checkerr = 0;
3526 int rtnval = -1;
3527 struct procinfo *pi;
3528
3529 scan_again:
3530
3531 /* handle all syscall events first, otherwise we might not
3532 notice a thread was created until too late. */
3533
3534 for (pi = procinfo_list; pi; pi = pi->next)
3535 {
3536 if (!pi->had_event)
3537 continue;
3538
3539 if (!(THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
3540 continue;
3541
3542 why = THE_PR_LWP (pi->prstatus).pr_why;
3543 what = THE_PR_LWP (pi->prstatus).pr_what;
3544 if (why == PR_SYSENTRY || why == PR_SYSEXIT)
3545 {
3546 int i;
3547 int found_handler = 0;
3548
3549 for (i = 0; i < pi->num_syscall_handlers; i++)
3550 if (pi->syscall_handlers[i].syscall_num == what)
3551 {
3552 found_handler = 1;
3553 pi->saved_rtnval = pi->pid;
3554 pi->saved_statval = 0;
3555 if (!pi->syscall_handlers[i].func
3556 (pi, what, why, &pi->saved_rtnval, &pi->saved_statval))
3557 pi->had_event = 0;
3558 break;
3559 }
3560
3561 if (!found_handler)
3562 {
3563 if (why == PR_SYSENTRY)
3564 error ("PR_SYSENTRY, unhandled system call %d", what);
3565 else
3566 error ("PR_SYSEXIT, unhandled system call %d", what);
3567 }
3568 }
3569 }
3570
3571 /* find a relevant process with an event */
3572
3573 for (pi = procinfo_list; pi; pi = pi->next)
3574 if (pi->had_event && (pid == -1 || pi->pid == pid))
3575 break;
3576
3577 if (!pi)
3578 {
3579 wait_fd ();
3580 goto scan_again;
3581 }
3582
3583 if (!checkerr
3584 && !(THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
3585 {
3586 if (!procfs_write_pcwstop (pi))
3587 {
3588 checkerr++;
3589 }
3590 }
3591 if (checkerr)
3592 {
3593 if (errno == ENOENT)
3594 {
3595 /* XXX Fixme -- what to do if attached? Can't call wait... */
3596 rtnval = wait (&statval);
3597 if ((rtnval) != (PIDGET (inferior_pid)))
3598 {
3599 print_sys_errmsg (pi->pathname, errno);
3600 error ("procfs_wait: wait failed, returned %d", rtnval);
3601 /* NOTREACHED */
3602 }
3603 }
3604 else
3605 {
3606 print_sys_errmsg (pi->pathname, errno);
3607 error ("PIOCSTATUS or PIOCWSTOP failed.");
3608 /* NOTREACHED */
3609 }
3610 }
3611 else if (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP))
3612 {
3613 #ifdef UNIXWARE
3614 rtnval = pi->prstatus.pr_pid;
3615 #else
3616 rtnval = pi->pid;
3617 #endif
3618 why = THE_PR_LWP (pi->prstatus).pr_why;
3619 what = THE_PR_LWP (pi->prstatus).pr_what;
3620
3621 switch (why)
3622 {
3623 case PR_SIGNALLED:
3624 statval = (what << 8) | 0177;
3625 break;
3626 case PR_SYSENTRY:
3627 case PR_SYSEXIT:
3628 rtnval = pi->saved_rtnval;
3629 statval = pi->saved_statval;
3630 break;
3631 case PR_REQUESTED:
3632 statval = (SIGSTOP << 8) | 0177;
3633 break;
3634 case PR_JOBCONTROL:
3635 statval = (what << 8) | 0177;
3636 break;
3637 case PR_FAULTED:
3638 switch (what)
3639 {
3640 #ifdef FLTWATCH
3641 case FLTWATCH:
3642 statval = (SIGTRAP << 8) | 0177;
3643 break;
3644 #endif
3645 #ifdef FLTKWATCH
3646 case FLTKWATCH:
3647 statval = (SIGTRAP << 8) | 0177;
3648 break;
3649 #endif
3650 #ifndef FAULTED_USE_SIGINFO
3651 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3652 Solaris fills in si_signo. I'm not sure about others. */
3653 case FLTPRIV:
3654 case FLTILL:
3655 statval = (SIGILL << 8) | 0177;
3656 break;
3657 case FLTBPT:
3658 case FLTTRACE:
3659 statval = (SIGTRAP << 8) | 0177;
3660 break;
3661 case FLTSTACK:
3662 case FLTACCESS:
3663 case FLTBOUNDS:
3664 statval = (SIGSEGV << 8) | 0177;
3665 break;
3666 case FLTIOVF:
3667 case FLTIZDIV:
3668 case FLTFPE:
3669 statval = (SIGFPE << 8) | 0177;
3670 break;
3671 case FLTPAGE: /* Recoverable page fault */
3672 #endif /* not FAULTED_USE_SIGINFO */
3673 default:
3674 /* Use the signal which the kernel assigns. This is better than
3675 trying to second-guess it from the fault. In fact, I suspect
3676 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3677 statval =
3678 ((THE_PR_LWP (pi->prstatus).pr_info.si_signo) << 8) | 0177;
3679 break;
3680 }
3681 break;
3682 default:
3683 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
3684 }
3685 /* Stop all the other threads when any of them stops. */
3686
3687 {
3688 struct procinfo *procinfo, *next_pi;
3689
3690 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3691 {
3692 next_pi = procinfo->next;
3693 if (!procinfo->had_event)
3694 {
3695 #ifdef PROCFS_USE_READ_WRITE
3696 long cmd = PCSTOP;
3697 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3698 {
3699 print_sys_errmsg (procinfo->pathname, errno);
3700 error ("PCSTOP failed");
3701 }
3702 #else
3703 /* A bug in Solaris (2.5) causes us to hang when trying to
3704 stop a stopped process. So, we have to check first in
3705 order to avoid the hang. */
3706 if (!procfs_read_status (procinfo))
3707 {
3708 /* The LWP has apparently terminated. */
3709 if (info_verbose)
3710 printf_filtered ("LWP %d doesn't respond.\n",
3711 (procinfo->pid >> 16) & 0xffff);
3712 close_proc_file (procinfo);
3713 continue;
3714 }
3715
3716 if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
3717 if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
3718 < 0)
3719 {
3720 print_sys_errmsg (procinfo->pathname, errno);
3721 warning ("PIOCSTOP failed");
3722 }
3723 #endif
3724 }
3725 }
3726 }
3727 }
3728 else
3729 {
3730 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3731 THE_PR_LWP (pi->prstatus).pr_flags);
3732 }
3733
3734 store_waitstatus (ourstatus, statval);
3735
3736 if (rtnval == -1) /* No more children to wait for */
3737 {
3738 warning ("Child process unexpectedly missing");
3739 /* Claim it exited with unknown signal. */
3740 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3741 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
3742 return rtnval;
3743 }
3744
3745 pi->had_event = 0; /* Indicate that we've seen this one */
3746 return (rtnval);
3747 }
3748
3749 /*
3750
3751 LOCAL FUNCTION
3752
3753 set_proc_siginfo - set a process's current signal info
3754
3755 SYNOPSIS
3756
3757 void set_proc_siginfo (struct procinfo *pip, int signo);
3758
3759 DESCRIPTION
3760
3761 Given a pointer to a process info struct in PIP and a signal number
3762 in SIGNO, set the process's current signal and its associated signal
3763 information. The signal will be delivered to the process immediately
3764 after execution is resumed, even if it is being held. In addition,
3765 this particular delivery will not cause another PR_SIGNALLED stop
3766 even if the signal is being traced.
3767
3768 If we are not delivering the same signal that the prstatus siginfo
3769 struct contains information about, then synthesize a siginfo struct
3770 to match the signal we are going to deliver, make it of the type
3771 "generated by a user process", and send this synthesized copy. When
3772 used to set the inferior's signal state, this will be required if we
3773 are not currently stopped because of a traced signal, or if we decide
3774 to continue with a different signal.
3775
3776 Note that when continuing the inferior from a stop due to receipt
3777 of a traced signal, we either have set PRCSIG to clear the existing
3778 signal, or we have to call this function to do a PIOCSSIG with either
3779 the existing siginfo struct from pr_info, or one we have synthesized
3780 appropriately for the signal we want to deliver. Otherwise if the
3781 signal is still being traced, the inferior will immediately stop
3782 again.
3783
3784 See siginfo(5) for more details.
3785 */
3786
3787 static void
3788 set_proc_siginfo (pip, signo)
3789 struct procinfo *pip;
3790 int signo;
3791 {
3792 struct siginfo newsiginfo;
3793 struct siginfo *sip;
3794 #if defined (UNIXWARE) || defined (PROCFS_USE_READ_WRITE)
3795 struct sigi_ctl sictl;
3796 #endif
3797
3798 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3799 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3800 receives a PIOCSSIG with a signal identical to the current signal,
3801 it messes up the current signal. Work around the kernel bug. */
3802 if (signo == THE_PR_LWP (pip->prstatus).pr_cursig)
3803 return;
3804 #endif
3805
3806 #ifdef UNIXWARE
3807 if (signo == THE_PR_LWP (pip->prstatus).pr_info.si_signo)
3808 {
3809 memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info,
3810 sizeof (siginfo_t));
3811 }
3812 #else
3813 if (signo == THE_PR_LWP (pip->prstatus).pr_info.si_signo)
3814 {
3815 sip = &pip->prstatus.pr_info;
3816 }
3817 #endif
3818 else
3819 {
3820 #ifdef UNIXWARE
3821 siginfo_t *sip = &sictl.siginfo;
3822 memset ((char *) sip, 0, sizeof (siginfo_t));
3823 #else
3824 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
3825 sip = &newsiginfo;
3826 #endif
3827 sip->si_signo = signo;
3828 sip->si_code = 0;
3829 sip->si_errno = 0;
3830 sip->si_pid = getpid ();
3831 sip->si_uid = getuid ();
3832 }
3833 #ifdef PROCFS_USE_READ_WRITE
3834 sictl.cmd = PCSSIG;
3835 if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0)
3836 #else
3837 if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0)
3838 #endif
3839 {
3840 print_sys_errmsg (pip->pathname, errno);
3841 warning ("PIOCSSIG failed");
3842 }
3843 }
3844
3845 /* Resume execution of process PID. If STEP is nozero, then
3846 just single step it. If SIGNAL is nonzero, restart it with that
3847 signal activated. */
3848
3849 static void
3850 procfs_resume (pid, step, signo)
3851 int pid;
3852 int step;
3853 enum target_signal signo;
3854 {
3855 int signal_to_pass;
3856 struct procinfo *pi, *procinfo, *next_pi;
3857 #if defined (UNIXWARE) || defined (PROCFS_USE_READ_WRITE)
3858 struct proc_ctl pctl;
3859 #endif
3860
3861 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3862
3863 errno = 0;
3864 #ifdef UNIXWARE
3865 pctl.cmd = PCRUN;
3866 pctl.data = PRCFAULT;
3867 #else
3868 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
3869 #endif
3870
3871 #if 0
3872 /* It should not be necessary. If the user explicitly changes the value,
3873 value_assign calls write_register_bytes, which writes it. */
3874 /* It may not be absolutely necessary to specify the PC value for
3875 restarting, but to be safe we use the value that gdb considers
3876 to be current. One case where this might be necessary is if the
3877 user explicitly changes the PC value that gdb considers to be
3878 current. FIXME: Investigate if this is necessary or not. */
3879
3880 #ifdef PRSVADDR_BROKEN
3881 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3882 place to put nPC. In fact, if you use this, nPC seems to be set to some
3883 random garbage. We have to rely on the fact that PC and nPC have been
3884 written previously via PIOCSREG during a register flush. */
3885
3886 pi->prrun.pr_vaddr = (caddr_t) * (int *) &registers[REGISTER_BYTE (PC_REGNUM)];
3887 pi->prrun.pr_flags != PRSVADDR;
3888 #endif
3889 #endif
3890
3891 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
3892 /* When attaching to a child process, if we forced it to stop with
3893 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3894 Upon resuming the first time after such a stop, we explicitly
3895 inhibit sending it another SIGSTOP, which would be the normal
3896 result of default signal handling. One potential drawback to
3897 this is that we will also ignore any attempt to by the user
3898 to explicitly continue after the attach with a SIGSTOP. Ultimately
3899 this problem should be dealt with by making the routines that
3900 deal with the inferior a little smarter, and possibly even allow
3901 an inferior to continue running at the same time as gdb. (FIXME?) */
3902 signal_to_pass = 0;
3903 else if (signo == TARGET_SIGNAL_TSTP
3904 && THE_PR_LWP (pi->prstatus).pr_cursig == SIGTSTP
3905 && THE_PR_LWP (pi->prstatus).pr_action.sa_handler == SIG_DFL
3906 )
3907
3908 /* We are about to pass the inferior a SIGTSTP whose action is
3909 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3910 (notifying the parent via wait()), and then keep going from the
3911 same place when the parent is ready for you to keep going. So
3912 under the debugger, it should do nothing (as if the program had
3913 been stopped and then later resumed. Under ptrace, this
3914 happens for us, but under /proc, the system obligingly stops
3915 the process, and wait_for_inferior would have no way of
3916 distinguishing that type of stop (which indicates that we
3917 should just start it again), with a stop due to the pr_trace
3918 field of the prrun_t struct.
3919
3920 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3921 because the handler needs to get executed. */
3922 signal_to_pass = 0;
3923 else
3924 signal_to_pass = target_signal_to_host (signo);
3925
3926 if (signal_to_pass)
3927 {
3928 set_proc_siginfo (pi, signal_to_pass);
3929 }
3930 else
3931 {
3932 #ifdef UNIXWARE
3933 pctl.data |= PRCSIG;
3934 #else
3935 pi->prrun.pr_flags |= PRCSIG;
3936 #endif
3937 }
3938 pi->nopass_next_sigstop = 0;
3939 if (step)
3940 {
3941 #ifdef UNIXWARE
3942 pctl.data |= PRSTEP;
3943 #else
3944 pi->prrun.pr_flags |= PRSTEP;
3945 #endif
3946 }
3947 pi->had_event = 0;
3948 /* Don't try to start a process unless it's stopped on an
3949 `event of interest'. Doing so will cause errors. */
3950
3951 if (!procfs_read_status (pi))
3952 {
3953 /* The LWP has apparently terminated. */
3954 if (info_verbose)
3955 printf_filtered ("LWP %d doesn't respond.\n",
3956 (pi->pid >> 16) & 0xffff);
3957 close_proc_file (pi);
3958 }
3959 else
3960 {
3961 #ifdef PROCFS_USE_READ_WRITE
3962 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
3963 #else
3964 if ((pi->prstatus.pr_flags & PR_ISTOP)
3965 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
3966 #endif
3967 {
3968 /* The LWP has apparently terminated. */
3969 if (info_verbose)
3970 printf_filtered ("LWP %d doesn't respond.\n",
3971 (pi->pid >> 16) & 0xffff);
3972 close_proc_file (pi);
3973 }
3974 }
3975
3976 /* Continue all the other threads that haven't had an event of interest.
3977 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3978 set by do_attach, and means this is the first resume after an attach.
3979 All threads were CSTOP'd by do_attach, and should be resumed now. */
3980
3981 if (pid == -1)
3982 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3983 {
3984 next_pi = procinfo->next;
3985 if (pi != procinfo)
3986 if (!procinfo->had_event ||
3987 (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
3988 {
3989 procinfo->had_event = procinfo->nopass_next_sigstop = 0;
3990 #ifdef PROCFS_USE_READ_WRITE
3991 pctl.data = PRCFAULT | PRCSIG;
3992 if (write (procinfo->ctl_fd, (char *) &pctl,
3993 sizeof (struct proc_ctl)) < 0)
3994 {
3995 if (!procfs_read_status (procinfo))
3996 fprintf_unfiltered (gdb_stderr,
3997 "procfs_read_status failed, errno=%d\n",
3998 errno);
3999 print_sys_errmsg (procinfo->pathname, errno);
4000 error ("PCRUN failed");
4001 }
4002 #else
4003 procinfo->prrun.pr_flags &= PRSTEP;
4004 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
4005 if (!procfs_read_status (procinfo))
4006 {
4007 /* The LWP has apparently terminated. */
4008 if (info_verbose)
4009 printf_filtered ("LWP %d doesn't respond.\n",
4010 (procinfo->pid >> 16) & 0xffff);
4011 close_proc_file (procinfo);
4012 continue;
4013 }
4014
4015 /* Don't try to start a process unless it's stopped on an
4016 `event of interest'. Doing so will cause errors. */
4017
4018 if ((procinfo->prstatus.pr_flags & PR_ISTOP)
4019 && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
4020 {
4021 if (!procfs_read_status (procinfo))
4022 fprintf_unfiltered (gdb_stderr,
4023 "procfs_read_status failed, errno=%d\n",
4024 errno);
4025 print_sys_errmsg (procinfo->pathname, errno);
4026 warning ("PIOCRUN failed");
4027 }
4028 #endif
4029 }
4030 procfs_read_status (procinfo);
4031 }
4032 }
4033
4034 /*
4035
4036 LOCAL FUNCTION
4037
4038 procfs_fetch_registers -- fetch current registers from inferior
4039
4040 SYNOPSIS
4041
4042 void procfs_fetch_registers (int regno)
4043
4044 DESCRIPTION
4045
4046 Read the current values of the inferior's registers, both the
4047 general register set and floating point registers (if supported)
4048 and update gdb's idea of their current values.
4049
4050 */
4051
4052 static void
4053 procfs_fetch_registers (regno)
4054 int regno;
4055 {
4056 struct procinfo *pi;
4057
4058 pi = current_procinfo;
4059
4060 #ifdef UNIXWARE
4061 if (procfs_read_status (pi))
4062 {
4063 supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
4064 #if defined (FP0_REGNUM)
4065 supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs);
4066 #endif
4067 }
4068 #else /* UNIXWARE */
4069 if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1)
4070 {
4071 supply_gregset (&pi->gregset.gregset);
4072 }
4073 #if defined (FP0_REGNUM)
4074 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1)
4075 {
4076 supply_fpregset (&pi->fpregset.fpregset);
4077 }
4078 #endif
4079 #endif /* UNIXWARE */
4080 }
4081
4082 /*
4083
4084 LOCAL FUNCTION
4085
4086 proc_init_failed - called when /proc access initialization fails
4087 fails
4088
4089 SYNOPSIS
4090
4091 static void proc_init_failed (struct procinfo *pi,
4092 char *why, int kill_p)
4093
4094 DESCRIPTION
4095
4096 This function is called whenever initialization of access to a /proc
4097 entry fails. It prints a suitable error message, does some cleanup,
4098 and then invokes the standard error processing routine which dumps
4099 us back into the command loop. If KILL_P is true, sends SIGKILL.
4100 */
4101
4102 static void
4103 proc_init_failed (pi, why, kill_p)
4104 struct procinfo *pi;
4105 char *why;
4106 int kill_p;
4107 {
4108 print_sys_errmsg (pi->pathname, errno);
4109 if (kill_p)
4110 kill (pi->pid, SIGKILL);
4111 close_proc_file (pi);
4112 error (why);
4113 /* NOTREACHED */
4114 }
4115
4116 /*
4117
4118 LOCAL FUNCTION
4119
4120 close_proc_file - close any currently open /proc entry
4121
4122 SYNOPSIS
4123
4124 static void close_proc_file (struct procinfo *pip)
4125
4126 DESCRIPTION
4127
4128 Close any currently open /proc entry and mark the process information
4129 entry as invalid. In order to ensure that we don't try to reuse any
4130 stale information, the pid, fd, and pathnames are explicitly
4131 invalidated, which may be overkill.
4132
4133 */
4134
4135 static void
4136 close_proc_file (pip)
4137 struct procinfo *pip;
4138 {
4139 struct procinfo *procinfo;
4140
4141 delete_thread (pip->pid); /* remove thread from GDB's thread list */
4142 remove_fd (pip); /* Remove fd from poll/select list */
4143
4144 close (pip->ctl_fd);
4145 #ifdef HAVE_MULTIPLE_PROC_FDS
4146 close (pip->as_fd);
4147 close (pip->status_fd);
4148 close (pip->map_fd);
4149 #endif
4150
4151 free (pip->pathname);
4152
4153 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4154
4155 if (procinfo_list == pip)
4156 procinfo_list = pip->next;
4157 else
4158 {
4159 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
4160 {
4161 if (procinfo->next == pip)
4162 {
4163 procinfo->next = pip->next;
4164 break;
4165 }
4166 }
4167 free (pip);
4168 }
4169 }
4170
4171 static void
4172 close_proc_file_cleanup (pip)
4173 void *pip;
4174 {
4175 close_proc_file ((struct procinfo *) pip);
4176 }
4177
4178 static struct cleanup *
4179 make_cleanup_close_proc_file (pip)
4180 struct procinfo *pip;
4181 {
4182 return make_cleanup (close_proc_file_cleanup, pip);
4183 }
4184
4185 /*
4186
4187 LOCAL FUNCTION
4188
4189 open_proc_file - open a /proc entry for a given process id
4190
4191 SYNOPSIS
4192
4193 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4194
4195 DESCRIPTION
4196
4197 Given a process id and a mode, close the existing open /proc
4198 entry (if any) and open one for the new process id, in the
4199 specified mode. Once it is open, then mark the local process
4200 information structure as valid, which guarantees that the pid,
4201 fd, and pathname fields match an open /proc entry. Returns
4202 zero if the open fails, nonzero otherwise.
4203
4204 Note that the pathname is left intact, even when the open fails,
4205 so that callers can use it to construct meaningful error messages
4206 rather than just "file open failed".
4207
4208 Note that for Solaris, the process-id also includes an LWP-id, so we
4209 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4210 then we will ask the kernel what it is and add it to the pid. Hence,
4211 the pid can be changed by us.
4212 */
4213
4214 static int
4215 open_proc_file (pid, pip, mode, control)
4216 int pid;
4217 struct procinfo *pip;
4218 int mode;
4219 int control;
4220 {
4221 int tmp, tmpfd;
4222
4223 pip->next = NULL;
4224 pip->had_event = 0;
4225 pip->pathname = xmalloc (MAX_PROC_NAME_SIZE);
4226 pip->pid = pid;
4227
4228 #ifndef PIOCOPENLWP
4229 tmp = pid;
4230 #else
4231 tmp = pid & 0xffff;
4232 #endif
4233
4234 #ifdef HAVE_MULTIPLE_PROC_FDS
4235 sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp);
4236 if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0)
4237 {
4238 return 0;
4239 }
4240
4241 sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp);
4242 if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0)
4243 {
4244 close (pip->status_fd);
4245 return 0;
4246 }
4247
4248 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4249 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4250 {
4251 close (pip->status_fd);
4252 close (pip->as_fd);
4253 return 0;
4254 }
4255
4256 if (control)
4257 {
4258 sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
4259 if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0)
4260 {
4261 close (pip->status_fd);
4262 close (pip->as_fd);
4263 close (pip->map_fd);
4264 return 0;
4265 }
4266 }
4267
4268 #else /* HAVE_MULTIPLE_PROC_FDS */
4269 sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
4270
4271 if ((tmpfd = open (pip->pathname, mode)) < 0)
4272 return 0;
4273
4274 #ifndef PIOCOPENLWP
4275 pip->ctl_fd = tmpfd;
4276 pip->as_fd = tmpfd;
4277 pip->map_fd = tmpfd;
4278 pip->status_fd = tmpfd;
4279 #else
4280 tmp = (pid >> 16) & 0xffff; /* Extract thread id */
4281
4282 if (tmp == 0)
4283 { /* Don't know thread id yet */
4284 if (ioctl (tmpfd, PIOCSTATUS, &pip->prstatus) < 0)
4285 {
4286 print_sys_errmsg (pip->pathname, errno);
4287 close (tmpfd);
4288 error ("open_proc_file: PIOCSTATUS failed");
4289 }
4290
4291 tmp = pip->prstatus.pr_who; /* Get thread id from prstatus_t */
4292 pip->pid = (tmp << 16) | pid; /* Update pip */
4293 }
4294
4295 if ((pip->ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0)
4296 {
4297 close (tmpfd);
4298 return 0;
4299 }
4300
4301 #ifdef PIOCSET /* New method */
4302 {
4303 long pr_flags;
4304 pr_flags = PR_ASYNC;
4305 ioctl (pip->ctl_fd, PIOCSET, &pr_flags);
4306 }
4307 #endif
4308
4309 /* keep extra fds in sync */
4310 pip->as_fd = pip->ctl_fd;
4311 pip->map_fd = pip->ctl_fd;
4312 pip->status_fd = pip->ctl_fd;
4313
4314 close (tmpfd); /* All done with main pid */
4315 #endif /* PIOCOPENLWP */
4316
4317 #endif /* HAVE_MULTIPLE_PROC_FDS */
4318
4319 return 1;
4320 }
4321
4322 static char *
4323 mappingflags (flags)
4324 long flags;
4325 {
4326 static char asciiflags[8];
4327
4328 strcpy (asciiflags, "-------");
4329 #if defined (MA_PHYS)
4330 if (flags & MA_PHYS)
4331 asciiflags[0] = 'd';
4332 #endif
4333 if (flags & MA_STACK)
4334 asciiflags[1] = 's';
4335 if (flags & MA_BREAK)
4336 asciiflags[2] = 'b';
4337 if (flags & MA_SHARED)
4338 asciiflags[3] = 's';
4339 if (flags & MA_READ)
4340 asciiflags[4] = 'r';
4341 if (flags & MA_WRITE)
4342 asciiflags[5] = 'w';
4343 if (flags & MA_EXEC)
4344 asciiflags[6] = 'x';
4345 return (asciiflags);
4346 }
4347
4348 static void
4349 info_proc_flags (pip, summary)
4350 struct procinfo *pip;
4351 int summary;
4352 {
4353 struct trans *transp;
4354 #ifdef UNIXWARE
4355 long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags;
4356 #else
4357 long flags = pip->prstatus.pr_flags;
4358 #endif
4359
4360 printf_filtered ("%-32s", "Process status flags:");
4361 if (!summary)
4362 {
4363 printf_filtered ("\n\n");
4364 }
4365 for (transp = pr_flag_table; transp->name != NULL; transp++)
4366 {
4367 if (flags & transp->value)
4368 {
4369 if (summary)
4370 {
4371 printf_filtered ("%s ", transp->name);
4372 }
4373 else
4374 {
4375 printf_filtered ("\t%-16s %s.\n", transp->name, transp->desc);
4376 }
4377 }
4378 }
4379 printf_filtered ("\n");
4380 }
4381
4382 static void
4383 info_proc_stop (pip, summary)
4384 struct procinfo *pip;
4385 int summary;
4386 {
4387 struct trans *transp;
4388 int why;
4389 int what;
4390
4391 why = THE_PR_LWP (pip->prstatus).pr_why;
4392 what = THE_PR_LWP (pip->prstatus).pr_what;
4393
4394 if (THE_PR_LWP (pip->prstatus).pr_flags & PR_STOPPED)
4395 {
4396 printf_filtered ("%-32s", "Reason for stopping:");
4397 if (!summary)
4398 {
4399 printf_filtered ("\n\n");
4400 }
4401 for (transp = pr_why_table; transp->name != NULL; transp++)
4402 {
4403 if (why == transp->value)
4404 {
4405 if (summary)
4406 {
4407 printf_filtered ("%s ", transp->name);
4408 }
4409 else
4410 {
4411 printf_filtered ("\t%-16s %s.\n",
4412 transp->name, transp->desc);
4413 }
4414 break;
4415 }
4416 }
4417
4418 /* Use the pr_why field to determine what the pr_what field means, and
4419 print more information. */
4420
4421 switch (why)
4422 {
4423 case PR_REQUESTED:
4424 /* pr_what is unused for this case */
4425 break;
4426 case PR_JOBCONTROL:
4427 case PR_SIGNALLED:
4428 if (summary)
4429 {
4430 printf_filtered ("%s ", signalname (what));
4431 }
4432 else
4433 {
4434 printf_filtered ("\t%-16s %s.\n", signalname (what),
4435 safe_strsignal (what));
4436 }
4437 break;
4438 case PR_SYSENTRY:
4439 if (summary)
4440 {
4441 printf_filtered ("%s ", syscallname (what));
4442 }
4443 else
4444 {
4445 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4446 "Entered this system call");
4447 }
4448 break;
4449 case PR_SYSEXIT:
4450 if (summary)
4451 {
4452 printf_filtered ("%s ", syscallname (what));
4453 }
4454 else
4455 {
4456 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4457 "Returned from this system call");
4458 }
4459 break;
4460 case PR_FAULTED:
4461 if (summary)
4462 {
4463 printf_filtered ("%s ",
4464 lookupname (faults_table, what, "fault"));
4465 }
4466 else
4467 {
4468 printf_filtered ("\t%-16s %s.\n",
4469 lookupname (faults_table, what, "fault"),
4470 lookupdesc (faults_table, what));
4471 }
4472 break;
4473 }
4474 printf_filtered ("\n");
4475 }
4476 }
4477
4478 static void
4479 info_proc_siginfo (pip, summary)
4480 struct procinfo *pip;
4481 int summary;
4482 {
4483 struct siginfo *sip;
4484
4485 if ((THE_PR_LWP (pip->prstatus).pr_flags & PR_STOPPED) &&
4486 (THE_PR_LWP (pip->prstatus).pr_why == PR_SIGNALLED ||
4487 THE_PR_LWP (pip->prstatus).pr_why == PR_FAULTED))
4488 {
4489 printf_filtered ("%-32s", "Additional signal/fault info:");
4490 sip = &(THE_PR_LWP (pip->prstatus).pr_info);
4491 if (summary)
4492 {
4493 printf_filtered ("%s ", signalname (sip->si_signo));
4494 if (sip->si_errno > 0)
4495 {
4496 printf_filtered ("%s ", errnoname (sip->si_errno));
4497 }
4498 if (sip->si_code <= 0)
4499 {
4500 printf_filtered ("sent by %s, uid %d ",
4501 target_pid_to_str (sip->si_pid),
4502 sip->si_uid);
4503 }
4504 else
4505 {
4506 printf_filtered ("%s ", sigcodename (sip));
4507 if ((sip->si_signo == SIGILL) ||
4508 (sip->si_signo == SIGFPE) ||
4509 (sip->si_signo == SIGSEGV) ||
4510 (sip->si_signo == SIGBUS))
4511 {
4512 printf_filtered ("addr=%#lx ",
4513 (unsigned long) sip->si_addr);
4514 }
4515 else if ((sip->si_signo == SIGCHLD))
4516 {
4517 printf_filtered ("child %s, status %u ",
4518 target_pid_to_str (sip->si_pid),
4519 sip->si_status);
4520 }
4521 else if ((sip->si_signo == SIGPOLL))
4522 {
4523 printf_filtered ("band %u ", sip->si_band);
4524 }
4525 }
4526 }
4527 else
4528 {
4529 printf_filtered ("\n\n");
4530 printf_filtered ("\t%-16s %s.\n", signalname (sip->si_signo),
4531 safe_strsignal (sip->si_signo));
4532 if (sip->si_errno > 0)
4533 {
4534 printf_filtered ("\t%-16s %s.\n",
4535 errnoname (sip->si_errno),
4536 safe_strerror (sip->si_errno));
4537 }
4538 if (sip->si_code <= 0)
4539 {
4540 printf_filtered ("\t%-16u %s\n", sip->si_pid, /* XXX need target_pid_to_str() */
4541 "PID of process sending signal");
4542 printf_filtered ("\t%-16u %s\n", sip->si_uid,
4543 "UID of process sending signal");
4544 }
4545 else
4546 {
4547 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
4548 sigcodedesc (sip));
4549 if ((sip->si_signo == SIGILL) ||
4550 (sip->si_signo == SIGFPE))
4551 {
4552 printf_filtered ("\t%#-16lx %s.\n",
4553 (unsigned long) sip->si_addr,
4554 "Address of faulting instruction");
4555 }
4556 else if ((sip->si_signo == SIGSEGV) ||
4557 (sip->si_signo == SIGBUS))
4558 {
4559 printf_filtered ("\t%#-16lx %s.\n",
4560 (unsigned long) sip->si_addr,
4561 "Address of faulting memory reference");
4562 }
4563 else if ((sip->si_signo == SIGCHLD))
4564 {
4565 printf_filtered ("\t%-16u %s.\n", sip->si_pid, /* XXX need target_pid_to_str() */
4566 "Child process ID");
4567 printf_filtered ("\t%-16u %s.\n", sip->si_status,
4568 "Child process exit value or signal");
4569 }
4570 else if ((sip->si_signo == SIGPOLL))
4571 {
4572 printf_filtered ("\t%-16u %s.\n", sip->si_band,
4573 "Band event for POLL_{IN,OUT,MSG}");
4574 }
4575 }
4576 }
4577 printf_filtered ("\n");
4578 }
4579 }
4580
4581 static void
4582 info_proc_syscalls (pip, summary)
4583 struct procinfo *pip;
4584 int summary;
4585 {
4586 int syscallnum;
4587
4588 if (!summary)
4589 {
4590
4591 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4592 if (pip->prstatus.pr_flags & PR_ASLEEP)
4593 {
4594 int syscallnum = pip->prstatus.pr_reg[R_D0];
4595 if (summary)
4596 {
4597 printf_filtered ("%-32s", "Sleeping in system call:");
4598 printf_filtered ("%s", syscallname (syscallnum));
4599 }
4600 else
4601 {
4602 printf_filtered ("Sleeping in system call '%s'.\n",
4603 syscallname (syscallnum));
4604 }
4605 }
4606 #endif
4607
4608 #ifndef UNIXWARE
4609 if (ioctl (pip->ctl_fd, PIOCGENTRY, &pip->entryset) < 0)
4610 {
4611 print_sys_errmsg (pip->pathname, errno);
4612 error ("PIOCGENTRY failed");
4613 }
4614
4615 if (ioctl (pip->ctl_fd, PIOCGEXIT, &pip->exitset) < 0)
4616 {
4617 print_sys_errmsg (pip->pathname, errno);
4618 error ("PIOCGEXIT failed");
4619 }
4620 #endif
4621
4622 printf_filtered ("System call tracing information:\n\n");
4623
4624 printf_filtered ("\t%-12s %-8s %-8s\n",
4625 "System call",
4626 "Entry",
4627 "Exit");
4628 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
4629 {
4630 QUIT;
4631 if (syscall_table[syscallnum] != NULL)
4632 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
4633 else
4634 printf_filtered ("\t%-12d ", syscallnum);
4635
4636 #ifdef UNIXWARE
4637 printf_filtered ("%-8s ",
4638 prismember (&pip->prstatus.pr_sysentry, syscallnum)
4639 ? "on" : "off");
4640 printf_filtered ("%-8s ",
4641 prismember (&pip->prstatus.pr_sysexit, syscallnum)
4642 ? "on" : "off");
4643 #else
4644 printf_filtered ("%-8s ",
4645 prismember (&pip->entryset, syscallnum)
4646 ? "on" : "off");
4647 printf_filtered ("%-8s ",
4648 prismember (&pip->exitset, syscallnum)
4649 ? "on" : "off");
4650 #endif
4651 printf_filtered ("\n");
4652 }
4653 printf_filtered ("\n");
4654 }
4655 }
4656
4657 static char *
4658 signalname (signo)
4659 int signo;
4660 {
4661 const char *name;
4662 static char locbuf[32];
4663
4664 name = strsigno (signo);
4665 if (name == NULL)
4666 {
4667 sprintf (locbuf, "Signal %d", signo);
4668 }
4669 else
4670 {
4671 sprintf (locbuf, "%s (%d)", name, signo);
4672 }
4673 return (locbuf);
4674 }
4675
4676 static char *
4677 errnoname (errnum)
4678 int errnum;
4679 {
4680 const char *name;
4681 static char locbuf[32];
4682
4683 name = strerrno (errnum);
4684 if (name == NULL)
4685 {
4686 sprintf (locbuf, "Errno %d", errnum);
4687 }
4688 else
4689 {
4690 sprintf (locbuf, "%s (%d)", name, errnum);
4691 }
4692 return (locbuf);
4693 }
4694
4695 static void
4696 info_proc_signals (pip, summary)
4697 struct procinfo *pip;
4698 int summary;
4699 {
4700 int signo;
4701
4702 if (!summary)
4703 {
4704 #ifndef PROCFS_USE_READ_WRITE
4705 if (ioctl (pip->ctl_fd, PIOCGTRACE, &pip->trace) < 0)
4706 {
4707 print_sys_errmsg (pip->pathname, errno);
4708 error ("PIOCGTRACE failed");
4709 }
4710 #endif
4711
4712 printf_filtered ("Disposition of signals:\n\n");
4713 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4714 "Signal", "Trace", "Hold", "Pending", "Description");
4715 for (signo = 0; signo < NSIG; signo++)
4716 {
4717 QUIT;
4718 printf_filtered ("\t%-15s ", signalname (signo));
4719 #ifdef UNIXWARE
4720 printf_filtered ("%-8s ",
4721 prismember (&pip->prstatus.pr_sigtrace, signo)
4722 ? "on" : "off");
4723 printf_filtered ("%-8s ",
4724 prismember (&pip->prstatus.pr_lwp.pr_context.uc_sigmask, signo)
4725 ? "on" : "off");
4726 #else
4727 printf_filtered ("%-8s ",
4728 prismember (&pip->trace, signo)
4729 ? "on" : "off");
4730 printf_filtered ("%-8s ",
4731 prismember (&pip->prstatus.pr_sighold, signo)
4732 ? "on" : "off");
4733 #endif
4734
4735 #ifdef UNIXWARE
4736 if (prismember (&pip->prstatus.pr_sigpend, signo) ||
4737 prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo))
4738 printf_filtered ("%-8s ", "yes");
4739 else
4740 printf_filtered ("%-8s ", "no");
4741 #else /* UNIXWARE */
4742 #ifdef PROCFS_SIGPEND_OFFSET
4743 /* Alpha OSF/1 numbers the pending signals from 1. */
4744 printf_filtered ("%-8s ",
4745 (signo ? prismember (&pip->prstatus.pr_sigpend,
4746 signo - 1)
4747 : 0)
4748 ? "yes" : "no");
4749 #else
4750 printf_filtered ("%-8s ",
4751 prismember (&pip->prstatus.pr_sigpend, signo)
4752 ? "yes" : "no");
4753 #endif
4754 #endif /* UNIXWARE */
4755 printf_filtered (" %s\n", safe_strsignal (signo));
4756 }
4757 printf_filtered ("\n");
4758 }
4759 }
4760
4761 static void
4762 info_proc_faults (pip, summary)
4763 struct procinfo *pip;
4764 int summary;
4765 {
4766 struct trans *transp;
4767
4768 if (!summary)
4769 {
4770 #ifndef UNIXWARE
4771 if (ioctl (pip->ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0)
4772 {
4773 print_sys_errmsg (pip->pathname, errno);
4774 error ("PIOCGFAULT failed");
4775 }
4776 #endif
4777
4778 printf_filtered ("Current traced hardware fault set:\n\n");
4779 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4780
4781 for (transp = faults_table; transp->name != NULL; transp++)
4782 {
4783 QUIT;
4784 printf_filtered ("\t%-12s ", transp->name);
4785 #ifdef UNIXWARE
4786 printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp->value)
4787 ? "on" : "off");
4788 #else
4789 printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp->value)
4790 ? "on" : "off");
4791 #endif
4792 printf_filtered ("\n");
4793 }
4794 printf_filtered ("\n");
4795 }
4796 }
4797
4798 static void
4799 info_proc_mappings (pip, summary)
4800 struct procinfo *pip;
4801 int summary;
4802 {
4803 int nmap;
4804 struct prmap *prmaps;
4805 struct prmap *prmap;
4806 #ifdef PROCFS_USE_READ_WRITE
4807 struct stat sbuf;
4808 #endif
4809
4810 if (!summary)
4811 {
4812 printf_filtered ("Mapped address spaces:\n\n");
4813 #ifdef BFD_HOST_64_BIT
4814 printf_filtered (" %18s %18s %10s %10s %7s\n",
4815 #else
4816 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4817 #endif
4818 "Start Addr",
4819 " End Addr",
4820 " Size",
4821 " Offset",
4822 "Flags");
4823 #ifdef PROCFS_USE_READ_WRITE
4824 if (fstat (pip->map_fd, &sbuf) == 0)
4825 {
4826 nmap = sbuf.st_size / sizeof (prmap_t);
4827 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4828 if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) &&
4829 (read (pip->map_fd, (char *) prmaps,
4830 nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps))))
4831 {
4832 int i = 0;
4833 for (prmap = prmaps; i < nmap; ++prmap, ++i)
4834 #else
4835 if (ioctl (pip->ctl_fd, PIOCNMAP, &nmap) == 0)
4836 {
4837 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4838 if (ioctl (pip->ctl_fd, PIOCMAP, prmaps) == 0)
4839 {
4840 for (prmap = prmaps; prmap->pr_size; ++prmap)
4841 #endif /* PROCFS_USE_READ_WRITE */
4842 {
4843 #ifdef BFD_HOST_64_BIT
4844 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4845 #else
4846 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4847 #endif
4848 (unsigned long) prmap->pr_vaddr,
4849 (unsigned long) prmap->pr_vaddr
4850 + prmap->pr_size - 1,
4851 prmap->pr_size,
4852 prmap->pr_off,
4853 mappingflags (prmap->pr_mflags));
4854 }
4855 }
4856 }
4857 printf_filtered ("\n");
4858 }
4859 }
4860
4861 /*
4862
4863 LOCAL FUNCTION
4864
4865 info_proc -- implement the "info proc" command
4866
4867 SYNOPSIS
4868
4869 void info_proc (char *args, int from_tty)
4870
4871 DESCRIPTION
4872
4873 Implement gdb's "info proc" command by using the /proc interface
4874 to print status information about any currently running process.
4875
4876 Examples of the use of "info proc" are:
4877
4878 info proc (prints summary info for current inferior)
4879 info proc 123 (prints summary info for process with pid 123)
4880 info proc mappings (prints address mappings)
4881 info proc times (prints process/children times)
4882 info proc id (prints pid, ppid, gid, sid, etc)
4883 FIXME: i proc id not implemented.
4884 info proc status (prints general process state info)
4885 FIXME: i proc status not implemented.
4886 info proc signals (prints info about signal handling)
4887 info proc all (prints all info)
4888
4889 */
4890
4891 static void
4892 info_proc (args, from_tty)
4893 char *args;
4894 int from_tty;
4895 {
4896 int pid;
4897 struct procinfo *pip;
4898 struct cleanup *old_chain;
4899 char **argv;
4900 int argsize;
4901 int summary = 1;
4902 int flags = 0;
4903 int syscalls = 0;
4904 int signals = 0;
4905 int faults = 0;
4906 int mappings = 0;
4907 int times = 0;
4908 int id = 0;
4909 int status = 0;
4910 int all = 0;
4911 int nlwp;
4912 int *lwps;
4913
4914 old_chain = make_cleanup (null_cleanup, 0);
4915
4916 /* Default to using the current inferior if no pid specified. Note
4917 that inferior_pid may be 0, hence we set okerr. */
4918
4919 pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
4920 if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
4921 pip = procinfo_list; /* take first available */
4922 pid = pid & 0xffff; /* extract "real" pid */
4923
4924 if (args != NULL)
4925 {
4926 if ((argv = buildargv (args)) == NULL)
4927 {
4928 nomem (0);
4929 }
4930 make_cleanup_freeargv (argv);
4931
4932 while (*argv != NULL)
4933 {
4934 argsize = strlen (*argv);
4935 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
4936 {
4937 summary = 0;
4938 all = 1;
4939 }
4940 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
4941 {
4942 summary = 0;
4943 faults = 1;
4944 }
4945 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
4946 {
4947 summary = 0;
4948 flags = 1;
4949 }
4950 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
4951 {
4952 summary = 0;
4953 id = 1;
4954 }
4955 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
4956 {
4957 summary = 0;
4958 mappings = 1;
4959 }
4960 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
4961 {
4962 summary = 0;
4963 signals = 1;
4964 }
4965 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
4966 {
4967 summary = 0;
4968 status = 1;
4969 }
4970 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
4971 {
4972 summary = 0;
4973 syscalls = 1;
4974 }
4975 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
4976 {
4977 summary = 0;
4978 times = 1;
4979 }
4980 else if ((pid = atoi (*argv)) > 0)
4981 {
4982 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4983 memset (pip, 0, sizeof (*pip));
4984
4985 pip->pid = pid;
4986 if (!open_proc_file (pid, pip, O_RDONLY, 0))
4987 {
4988 perror_with_name (pip->pathname);
4989 /* NOTREACHED */
4990 }
4991 pid = pip->pid;
4992 make_cleanup_close_proc_file (pip);
4993 }
4994 else if (**argv != '\000')
4995 {
4996 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
4997 }
4998 argv++;
4999 }
5000 }
5001
5002 /* If we don't have a valid open process at this point, then we have no
5003 inferior or didn't specify a specific pid. */
5004
5005 if (!pip)
5006 {
5007 error ("\
5008 No process. Start debugging a program or specify an explicit process ID.");
5009 }
5010
5011 if (!procfs_read_status (pip))
5012 {
5013 print_sys_errmsg (pip->pathname, errno);
5014 error ("procfs_read_status failed");
5015 }
5016
5017 #ifndef PROCFS_USE_READ_WRITE
5018 #ifdef PIOCLWPIDS
5019 nlwp = pip->prstatus.pr_nlwp;
5020 lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
5021
5022 if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
5023 {
5024 print_sys_errmsg (pip->pathname, errno);
5025 error ("PIOCLWPIDS failed");
5026 }
5027 #else /* PIOCLWPIDS */
5028 nlwp = 1;
5029 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
5030 lwps[0] = 0;
5031 #endif /* PIOCLWPIDS */
5032
5033 for (; nlwp > 0; nlwp--, lwps++)
5034 {
5035 pip = find_procinfo ((*lwps << 16) | pid, 1);
5036
5037 if (!pip)
5038 {
5039 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
5040 memset (pip, 0, sizeof (*pip));
5041 if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0))
5042 continue;
5043
5044 make_cleanup_close_proc_file (pip);
5045
5046 if (!procfs_read_status (pip))
5047 {
5048 print_sys_errmsg (pip->pathname, errno);
5049 error ("procfs_read_status failed");
5050 }
5051 }
5052
5053 #endif /* PROCFS_USE_READ_WRITE */
5054
5055 /* Print verbose information of the requested type(s), or just a summary
5056 of the information for all types. */
5057
5058 printf_filtered ("\nInformation for %s.%d:\n\n", pip->pathname, *lwps);
5059 if (summary || all || flags)
5060 {
5061 info_proc_flags (pip, summary);
5062 }
5063 if (summary || all)
5064 {
5065 info_proc_stop (pip, summary);
5066 #ifdef UNIXWARE
5067 supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
5068 #else
5069 supply_gregset (&pip->prstatus.pr_reg);
5070 #endif
5071 printf_filtered ("PC: ");
5072 print_address (read_pc (), gdb_stdout);
5073 printf_filtered ("\n");
5074 }
5075 if (summary || all || signals || faults)
5076 {
5077 info_proc_siginfo (pip, summary);
5078 }
5079 if (summary || all || syscalls)
5080 {
5081 info_proc_syscalls (pip, summary);
5082 }
5083 if (summary || all || mappings)
5084 {
5085 info_proc_mappings (pip, summary);
5086 }
5087 if (summary || all || signals)
5088 {
5089 info_proc_signals (pip, summary);
5090 }
5091 if (summary || all || faults)
5092 {
5093 info_proc_faults (pip, summary);
5094 }
5095 printf_filtered ("\n");
5096
5097 /* All done, deal with closing any temporary process info structure,
5098 freeing temporary memory , etc. */
5099
5100 do_cleanups (old_chain);
5101 #ifndef PROCFS_USE_READ_WRITE
5102 }
5103 #endif
5104 }
5105
5106 /*
5107
5108 LOCAL FUNCTION
5109
5110 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
5111
5112 SYNOPSIS
5113
5114 void modify_inherit_on_fork_flag (fd, flag)
5115
5116 DESCRIPTION
5117
5118 Call this routine to modify the inherit-on-fork flag. This routine is
5119 just a nice wrapper to hide the #ifdefs needed by various systems to
5120 control this flag.
5121
5122 */
5123
5124 static void
5125 modify_inherit_on_fork_flag (fd, flag)
5126 int fd;
5127 int flag;
5128 {
5129 #if defined (PIOCSET) || defined (PCSET)
5130 long pr_flags;
5131 #endif
5132 int retval = 0;
5133 #ifdef PROCFS_USE_READ_WRITE
5134 struct proc_ctl pctl;
5135 #endif
5136
5137 #if defined (PIOCSET) || defined (PCSET) /* New method */
5138 pr_flags = PR_FORK;
5139 if (flag)
5140 {
5141 #ifdef PROCFS_USE_READ_WRITE
5142 pctl.cmd = PCSET;
5143 pctl.data = PR_FORK;
5144 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5145 retval = -1;
5146 #else
5147 retval = ioctl (fd, PIOCSET, &pr_flags);
5148 #endif
5149 }
5150 else
5151 {
5152 #ifdef PROCFS_USE_READ_WRITE
5153 pctl.cmd = PCRESET;
5154 pctl.data = PR_FORK;
5155 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5156 retval = -1;
5157 #else
5158 retval = ioctl (fd, PIOCRESET, &pr_flags);
5159 #endif
5160 }
5161
5162 #else
5163 #ifdef PIOCSFORK /* Original method */
5164 if (flag)
5165 {
5166 retval = ioctl (fd, PIOCSFORK, NULL);
5167 }
5168 else
5169 {
5170 retval = ioctl (fd, PIOCRFORK, NULL);
5171 }
5172 #else
5173 Neither PR_FORK nor PIOCSFORK exist ! !!
5174 #endif
5175 #endif
5176
5177 if (!retval)
5178 return;
5179
5180 print_sys_errmsg ("modify_inherit_on_fork_flag", errno);
5181 error ("PIOCSFORK or PR_FORK modification failed");
5182 }
5183
5184 /*
5185
5186 LOCAL FUNCTION
5187
5188 modify_run_on_last_close_flag - Change the run-on-last-close flag
5189
5190 SYNOPSIS
5191
5192 void modify_run_on_last_close_flag (fd, flag)
5193
5194 DESCRIPTION
5195
5196 Call this routine to modify the run-on-last-close flag. This routine
5197 is just a nice wrapper to hide the #ifdefs needed by various systems to
5198 control this flag.
5199
5200 */
5201
5202 static void
5203 modify_run_on_last_close_flag (fd, flag)
5204 int fd;
5205 int flag;
5206 {
5207 #if defined (PIOCSET) || defined (PCSET)
5208 long pr_flags;
5209 #endif
5210 int retval = 0;
5211 #ifdef PROCFS_USE_READ_WRITE
5212 struct proc_ctl pctl;
5213 #endif
5214
5215 #if defined (PIOCSET) || defined (PCSET) /* New method */
5216 pr_flags = PR_RLC;
5217 if (flag)
5218 {
5219 #ifdef PROCFS_USE_READ_WRITE
5220 pctl.cmd = PCSET;
5221 pctl.data = PR_RLC;
5222 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5223 retval = -1;
5224 #else
5225 retval = ioctl (fd, PIOCSET, &pr_flags);
5226 #endif
5227 }
5228 else
5229 {
5230 #ifdef PROCFS_USE_READ_WRITE
5231 pctl.cmd = PCRESET;
5232 pctl.data = PR_RLC;
5233 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5234 retval = -1;
5235 #else
5236 retval = ioctl (fd, PIOCRESET, &pr_flags);
5237 #endif
5238 }
5239
5240 #else
5241 #ifdef PIOCSRLC /* Original method */
5242 if (flag)
5243 retval = ioctl (fd, PIOCSRLC, NULL);
5244 else
5245 retval = ioctl (fd, PIOCRRLC, NULL);
5246 #else
5247 Neither PR_RLC nor PIOCSRLC exist ! !!
5248 #endif
5249 #endif
5250
5251 if (!retval)
5252 return;
5253
5254 print_sys_errmsg ("modify_run_on_last_close_flag", errno);
5255 error ("PIOCSRLC or PR_RLC modification failed");
5256 }
5257
5258 /*
5259
5260 LOCAL FUNCTION
5261
5262 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5263
5264 SYNOPSIS
5265
5266 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5267
5268 DESCRIPTION
5269
5270 This function function disables traps for the specified system call.
5271 errok is non-zero if errors should be ignored.
5272 */
5273
5274 static void
5275 procfs_clear_syscall_trap (pi, syscall_num, errok)
5276 struct procinfo *pi;
5277 int syscall_num;
5278 int errok;
5279 {
5280 sysset_t sysset;
5281 int goterr, i;
5282
5283 #ifndef UNIXWARE
5284 goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
5285
5286 if (goterr && !errok)
5287 {
5288 print_sys_errmsg (pi->pathname, errno);
5289 error ("PIOCGENTRY failed");
5290 }
5291
5292 if (!goterr)
5293 {
5294 prdelset (&sysset, syscall_num);
5295
5296 if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok)
5297 {
5298 print_sys_errmsg (pi->pathname, errno);
5299 error ("PIOCSENTRY failed");
5300 }
5301 }
5302
5303 goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0;
5304
5305 if (goterr && !errok)
5306 {
5307 procfs_clear_syscall_trap (pi, syscall_num, 1);
5308 print_sys_errmsg (pi->pathname, errno);
5309 error ("PIOCGEXIT failed");
5310 }
5311
5312 if (!goterr)
5313 {
5314 praddset (&sysset, syscall_num);
5315
5316 if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok)
5317 {
5318 procfs_clear_syscall_trap (pi, syscall_num, 1);
5319 print_sys_errmsg (pi->pathname, errno);
5320 error ("PIOCSEXIT failed");
5321 }
5322 }
5323 #endif
5324
5325 if (!pi->syscall_handlers)
5326 {
5327 if (!errok)
5328 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5329 return;
5330 }
5331
5332 /* Remove handler func from the handler list */
5333
5334 for (i = 0; i < pi->num_syscall_handlers; i++)
5335 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5336 {
5337 if (i + 1 != pi->num_syscall_handlers)
5338 { /* Not the last entry.
5339 Move subsequent entries fwd. */
5340 memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1],
5341 (pi->num_syscall_handlers - i - 1)
5342 * sizeof (struct procfs_syscall_handler));
5343 }
5344
5345 pi->syscall_handlers = xrealloc (pi->syscall_handlers,
5346 (pi->num_syscall_handlers - 1)
5347 * sizeof (struct procfs_syscall_handler));
5348 pi->num_syscall_handlers--;
5349 return;
5350 }
5351
5352 if (!errok)
5353 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5354 syscall_num);
5355 }
5356
5357 /*
5358
5359 LOCAL FUNCTION
5360
5361 procfs_set_syscall_trap -- arrange for a function to be called when the
5362 child executes the specified system call.
5363
5364 SYNOPSIS
5365
5366 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5367 syscall_func_t *function)
5368
5369 DESCRIPTION
5370
5371 This function sets up an entry and/or exit trap for the specified system
5372 call. When the child executes the specified system call, your function
5373 will be called with the call #, a flag that indicates entry or exit, and
5374 pointers to rtnval and statval (which are used by procfs_wait). The
5375 function should return non-zero if something interesting happened, zero
5376 otherwise.
5377 */
5378
5379 static void
5380 procfs_set_syscall_trap (pi, syscall_num, flags, func)
5381 struct procinfo *pi;
5382 int syscall_num;
5383 int flags;
5384 syscall_func_t *func;
5385 {
5386 sysset_t sysset;
5387
5388 #ifndef UNIXWARE
5389 if (flags & PROCFS_SYSCALL_ENTRY)
5390 {
5391 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
5392 {
5393 print_sys_errmsg (pi->pathname, errno);
5394 error ("PIOCGENTRY failed");
5395 }
5396
5397 praddset (&sysset, syscall_num);
5398
5399 if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0)
5400 {
5401 print_sys_errmsg (pi->pathname, errno);
5402 error ("PIOCSENTRY failed");
5403 }
5404 }
5405
5406 if (flags & PROCFS_SYSCALL_EXIT)
5407 {
5408 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0)
5409 {
5410 procfs_clear_syscall_trap (pi, syscall_num, 1);
5411 print_sys_errmsg (pi->pathname, errno);
5412 error ("PIOCGEXIT failed");
5413 }
5414
5415 praddset (&sysset, syscall_num);
5416
5417 if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0)
5418 {
5419 procfs_clear_syscall_trap (pi, syscall_num, 1);
5420 print_sys_errmsg (pi->pathname, errno);
5421 error ("PIOCSEXIT failed");
5422 }
5423 }
5424 #endif
5425
5426 if (!pi->syscall_handlers)
5427 {
5428 pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler));
5429 pi->syscall_handlers[0].syscall_num = syscall_num;
5430 pi->syscall_handlers[0].func = func;
5431 pi->num_syscall_handlers = 1;
5432 }
5433 else
5434 {
5435 int i;
5436
5437 for (i = 0; i < pi->num_syscall_handlers; i++)
5438 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5439 {
5440 pi->syscall_handlers[i].func = func;
5441 return;
5442 }
5443
5444 pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1)
5445 * sizeof (struct procfs_syscall_handler));
5446 pi->syscall_handlers[i].syscall_num = syscall_num;
5447 pi->syscall_handlers[i].func = func;
5448 pi->num_syscall_handlers++;
5449 }
5450 }
5451
5452 #ifdef SYS_lwp_create
5453
5454 /*
5455
5456 LOCAL FUNCTION
5457
5458 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5459
5460 SYNOPSIS
5461
5462 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5463
5464 DESCRIPTION
5465
5466 This routine is called both when an inferior process and it's new lwp
5467 are about to finish a _lwp_create() system call. This is the system
5468 call that Solaris uses to create a lightweight process. When the
5469 target process gets this event, we can look at sysarg[2] to find the
5470 new childs lwp ID, and create a procinfo struct from that. After that,
5471 we pretend that we got a SIGTRAP, and return non-zero to tell
5472 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5473 sees the new process and continues it.
5474
5475 When we see the child exiting from lwp_create, we just contine it,
5476 since everything was handled when the parent trapped.
5477
5478 NOTES
5479 In effect, we are only paying attention to the parent's completion of
5480 the lwp_create syscall. If we only paid attention to the child
5481 instead, then we wouldn't detect the creation of a suspended thread.
5482 */
5483
5484 static int
5485 procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5486 struct procinfo *pi;
5487 int syscall_num;
5488 int why;
5489 int *rtnvalp;
5490 int *statvalp;
5491 {
5492 int lwp_id;
5493 struct procinfo *childpi;
5494 #ifdef UNIXWARE
5495 struct proc_ctl pctl;
5496 #endif
5497
5498 /* We've just detected the completion of an lwp_create system call. Now we
5499 need to setup a procinfo struct for this thread, and notify the thread
5500 system of the new arrival. */
5501
5502 /* If lwp_create failed, then nothing interesting happened. Continue the
5503 process and go back to sleep. */
5504
5505 #ifdef UNIXWARE
5506 /* Joel ... can you check this logic out please? JKJ */
5507 if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1)
5508 { /* _lwp_create failed */
5509 pctl.cmd = PCRUN;
5510 pctl.data = PRCFAULT;
5511
5512 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5513 perror_with_name (pi->pathname);
5514
5515 return 0;
5516 }
5517 #else /* UNIXWARE */
5518 if (PROCFS_GET_CARRY (pi->prstatus.pr_reg))
5519 { /* _lwp_create failed */
5520 pi->prrun.pr_flags &= PRSTEP;
5521 pi->prrun.pr_flags |= PRCFAULT;
5522
5523 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5524 perror_with_name (pi->pathname);
5525
5526 return 0;
5527 }
5528 #endif
5529
5530 /* At this point, the new thread is stopped at it's first instruction, and
5531 the parent is stopped at the exit from lwp_create. */
5532
5533 if (pi->new_child) /* Child? */
5534 { /* Yes, just continue it */
5535 #ifdef UNIXWARE
5536 pctl.cmd = PCRUN;
5537 pctl.data = PRCFAULT;
5538
5539 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5540 #else /* !UNIXWARE */
5541 pi->prrun.pr_flags &= PRSTEP;
5542 pi->prrun.pr_flags |= PRCFAULT;
5543
5544 if ((pi->prstatus.pr_flags & PR_ISTOP)
5545 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5546 #endif /* !UNIXWARE */
5547 perror_with_name (pi->pathname);
5548
5549 pi->new_child = 0; /* No longer new */
5550
5551 return 0;
5552 }
5553
5554 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5555 in the child and continue the parent. */
5556
5557 /* Third arg is pointer to new thread id. */
5558 lwp_id = read_memory_integer (
5559 THE_PR_LWP (pi->prstatus).pr_sysarg[2], sizeof (int));
5560
5561 lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
5562
5563 childpi = create_procinfo (lwp_id);
5564
5565 /* The new process has actually inherited the lwp_create syscall trap from
5566 it's parent, but we still have to call this to register handlers for
5567 that child. */
5568
5569 procfs_set_inferior_syscall_traps (childpi);
5570 add_thread (lwp_id);
5571 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
5572
5573 /* Continue the parent */
5574 #ifdef UNIXWARE
5575 pctl.cmd = PCRUN;
5576 pctl.data = PRCFAULT;
5577
5578 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5579 #else
5580 pi->prrun.pr_flags &= PRSTEP;
5581 pi->prrun.pr_flags |= PRCFAULT;
5582 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5583 #endif
5584 perror_with_name (pi->pathname);
5585
5586 /* The new child may have been created in one of two states:
5587 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5588 If suspended, we flag it to be continued later, when it has an event. */
5589
5590 if (THE_PR_LWP (childpi->prstatus).pr_why == PR_SUSPENDED)
5591 childpi->new_child = 1; /* Flag this as an unseen child process */
5592 else
5593 {
5594 /* Continue the child */
5595 #ifdef UNIXWARE
5596 pctl.cmd = PCRUN;
5597 pctl.data = PRCFAULT;
5598
5599 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5600 #else
5601 childpi->prrun.pr_flags &= PRSTEP;
5602 childpi->prrun.pr_flags |= PRCFAULT;
5603
5604 if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
5605 #endif
5606 perror_with_name (childpi->pathname);
5607 }
5608 return 0;
5609 }
5610 #endif /* SYS_lwp_create */
5611
5612 /* Fork an inferior process, and start debugging it with /proc. */
5613
5614 static void
5615 procfs_create_inferior (exec_file, allargs, env)
5616 char *exec_file;
5617 char *allargs;
5618 char **env;
5619 {
5620 char *shell_file = getenv ("SHELL");
5621 char *tryname;
5622 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
5623 {
5624
5625 /* We will be looking down the PATH to find shell_file. If we
5626 just do this the normal way (via execlp, which operates by
5627 attempting an exec for each element of the PATH until it
5628 finds one which succeeds), then there will be an exec for
5629 each failed attempt, each of which will cause a PR_SYSEXIT
5630 stop, and we won't know how to distinguish the PR_SYSEXIT's
5631 for these failed execs with the ones for successful execs
5632 (whether the exec has succeeded is stored at that time in the
5633 carry bit or some such architecture-specific and
5634 non-ABI-specified place).
5635
5636 So I can't think of anything better than to search the PATH
5637 now. This has several disadvantages: (1) There is a race
5638 condition; if we find a file now and it is deleted before we
5639 exec it, we lose, even if the deletion leaves a valid file
5640 further down in the PATH, (2) there is no way to know exactly
5641 what an executable (in the sense of "capable of being
5642 exec'd") file is. Using access() loses because it may lose
5643 if the caller is the superuser; failing to use it loses if
5644 there are ACLs or some such. */
5645
5646 char *p;
5647 char *p1;
5648 /* FIXME-maybe: might want "set path" command so user can change what
5649 path is used from within GDB. */
5650 char *path = getenv ("PATH");
5651 int len;
5652 struct stat statbuf;
5653
5654 if (path == NULL)
5655 path = "/bin:/usr/bin";
5656
5657 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
5658 for (p = path; p != NULL; p = p1 ? p1 + 1 : NULL)
5659 {
5660 p1 = strchr (p, ':');
5661 if (p1 != NULL)
5662 len = p1 - p;
5663 else
5664 len = strlen (p);
5665 strncpy (tryname, p, len);
5666 tryname[len] = '\0';
5667 strcat (tryname, "/");
5668 strcat (tryname, shell_file);
5669 if (access (tryname, X_OK) < 0)
5670 continue;
5671 if (stat (tryname, &statbuf) < 0)
5672 continue;
5673 if (!S_ISREG (statbuf.st_mode))
5674 /* We certainly need to reject directories. I'm not quite
5675 as sure about FIFOs, sockets, etc., but I kind of doubt
5676 that people want to exec() these things. */
5677 continue;
5678 break;
5679 }
5680 if (p == NULL)
5681 /* Not found. This must be an error rather than merely passing
5682 the file to execlp(), because execlp() would try all the
5683 exec()s, causing GDB to get confused. */
5684 error ("Can't find shell %s in PATH", shell_file);
5685
5686 shell_file = tryname;
5687 }
5688
5689 fork_inferior (exec_file, allargs, env,
5690 proc_set_exec_trap, procfs_init_inferior, NULL, shell_file);
5691
5692 /* We are at the first instruction we care about. */
5693 /* Pedal to the metal... */
5694
5695 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
5696 }
5697
5698 /* Clean up after the inferior dies. */
5699
5700 static void
5701 procfs_mourn_inferior ()
5702 {
5703 struct procinfo *pi;
5704 struct procinfo *next_pi;
5705
5706 for (pi = procinfo_list; pi; pi = next_pi)
5707 {
5708 next_pi = pi->next;
5709 unconditionally_kill_inferior (pi);
5710 }
5711
5712 unpush_target (&procfs_ops);
5713 generic_mourn_inferior ();
5714 }
5715
5716
5717 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5718 static int
5719 procfs_can_run ()
5720 {
5721 /* This variable is controlled by modules that sit atop procfs that may layer
5722 their own process structure atop that provided here. sol-thread.c does
5723 this because of the Solaris two-level thread model. */
5724
5725 return !procfs_suppress_run;
5726 }
5727 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5728 #ifndef UNIXWARE
5729 \f
5730 /* Insert a watchpoint */
5731 int
5732 procfs_set_watchpoint (pid, addr, len, rw)
5733 int pid;
5734 CORE_ADDR addr;
5735 int len;
5736 int rw;
5737 {
5738 struct procinfo *pi;
5739 prwatch_t wpt;
5740
5741 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5742 wpt.pr_vaddr = (caddr_t) addr;
5743 wpt.pr_size = len;
5744 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
5745 if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0)
5746 {
5747 if (errno == E2BIG)
5748 return -1;
5749 /* Currently it sometimes happens that the same watchpoint gets
5750 deleted twice - don't die in this case (FIXME please) */
5751 if (errno == ESRCH && len == 0)
5752 return 0;
5753 print_sys_errmsg (pi->pathname, errno);
5754 error ("PIOCSWATCH failed");
5755 }
5756 return 0;
5757 }
5758
5759 int
5760 procfs_stopped_by_watchpoint (pid)
5761 int pid;
5762 {
5763 struct procinfo *pi;
5764 short what;
5765 short why;
5766
5767 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5768 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
5769 {
5770 why = pi->prstatus.pr_why;
5771 what = pi->prstatus.pr_what;
5772 if (why == PR_FAULTED
5773 #if defined (FLTWATCH) && defined (FLTKWATCH)
5774 && (what == FLTWATCH || what == FLTKWATCH)
5775 #else
5776 #ifdef FLTWATCH
5777 && (what == FLTWATCH)
5778 #endif
5779 #ifdef FLTKWATCH
5780 && (what == FLTKWATCH)
5781 #endif
5782 #endif
5783 )
5784 return what;
5785 }
5786 return 0;
5787 }
5788 #endif /* !UNIXWARE */
5789 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5790
5791 /* Why is this necessary? Shouldn't dead threads just be removed from the
5792 thread database? */
5793
5794 static int
5795 procfs_thread_alive (pid)
5796 int pid;
5797 {
5798 struct procinfo *pi, *next_pi;
5799
5800 for (pi = procinfo_list; pi; pi = next_pi)
5801 {
5802 next_pi = pi->next;
5803 if (pi->pid == pid)
5804 {
5805 if (procfs_read_status (pi)) /* alive */
5806 return 1;
5807 else
5808 /* defunct (exited) */
5809 {
5810 close_proc_file (pi);
5811 return 0;
5812 }
5813 }
5814 }
5815 return 0;
5816 }
5817
5818 int
5819 procfs_first_available ()
5820 {
5821 struct procinfo *pi;
5822
5823 for (pi = procinfo_list; pi; pi = pi->next)
5824 {
5825 if (procfs_read_status (pi))
5826 return pi->pid;
5827 }
5828 return -1;
5829 }
5830
5831 int
5832 procfs_get_pid_fd (pid)
5833 int pid;
5834 {
5835 struct procinfo *pi = find_procinfo (pid, 1);
5836
5837 if (pi == NULL)
5838 return -1;
5839
5840 return pi->ctl_fd;
5841 }
5842
5843 /* Send a SIGINT to the process group. This acts just like the user typed a
5844 ^C on the controlling terminal.
5845
5846 XXX - This may not be correct for all systems. Some may want to use
5847 killpg() instead of kill (-pgrp). */
5848
5849 static void
5850 procfs_stop ()
5851 {
5852 extern pid_t inferior_process_group;
5853
5854 kill (-inferior_process_group, SIGINT);
5855 }
5856 \f
5857 /* Convert a pid to printable form. */
5858
5859 #ifdef TIDGET
5860 char *
5861 procfs_pid_to_str (pid)
5862 int pid;
5863 {
5864 static char buf[100];
5865
5866 sprintf (buf, "Kernel thread %d", TIDGET (pid));
5867
5868 return buf;
5869 }
5870 #endif /* TIDGET */
5871 \f
5872
5873 static void
5874 init_procfs_ops ()
5875 {
5876 procfs_ops.to_shortname = "procfs";
5877 procfs_ops.to_longname = "Unix /proc child process";
5878 procfs_ops.to_doc = "Unix /proc child process (started by the \"run\" command).";
5879 procfs_ops.to_open = procfs_open;
5880 procfs_ops.to_attach = procfs_attach;
5881 procfs_ops.to_detach = procfs_detach;
5882 procfs_ops.to_resume = procfs_resume;
5883 procfs_ops.to_wait = procfs_wait;
5884 procfs_ops.to_fetch_registers = procfs_fetch_registers;
5885 procfs_ops.to_store_registers = procfs_store_registers;
5886 procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
5887 procfs_ops.to_xfer_memory = procfs_xfer_memory;
5888 procfs_ops.to_files_info = procfs_files_info;
5889 procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
5890 procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
5891 procfs_ops.to_terminal_init = terminal_init_inferior;
5892 procfs_ops.to_terminal_inferior = terminal_inferior;
5893 procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output;
5894 procfs_ops.to_terminal_ours = terminal_ours;
5895 procfs_ops.to_terminal_info = child_terminal_info;
5896 procfs_ops.to_kill = procfs_kill_inferior;
5897 procfs_ops.to_create_inferior = procfs_create_inferior;
5898 procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
5899 procfs_ops.to_can_run = procfs_can_run;
5900 procfs_ops.to_notice_signals = procfs_notice_signals;
5901 procfs_ops.to_thread_alive = procfs_thread_alive;
5902 procfs_ops.to_stop = procfs_stop;
5903 procfs_ops.to_stratum = process_stratum;
5904 procfs_ops.to_has_all_memory = 1;
5905 procfs_ops.to_has_memory = 1;
5906 procfs_ops.to_has_stack = 1;
5907 procfs_ops.to_has_registers = 1;
5908 procfs_ops.to_has_execution = 1;
5909 procfs_ops.to_magic = OPS_MAGIC;
5910 }
5911
5912 void
5913 _initialize_procfs ()
5914 {
5915 #ifdef HAVE_OPTIONAL_PROC_FS
5916 char procname[MAX_PROC_NAME_SIZE];
5917 int fd;
5918
5919 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5920 don't add procfs support if we cannot access the running
5921 GDB via /proc. */
5922 sprintf (procname, STATUS_PROC_NAME_FMT, getpid ());
5923 if ((fd = open (procname, O_RDONLY)) < 0)
5924 return;
5925 close (fd);
5926 #endif
5927
5928 init_procfs_ops ();
5929 add_target (&procfs_ops);
5930
5931 add_info ("processes", info_proc,
5932 "Show process status information using /proc entry.\n\
5933 Specify process id or use current inferior by default.\n\
5934 Specify keywords for detailed information; default is summary.\n\
5935 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5936 `status', `syscalls', and `times'.\n\
5937 Unambiguous abbreviations may be used.");
5938
5939 init_syscall_table ();
5940 }
GDB Binutils - Deliverables
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