]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blob - gdb/procfs.c
projects / thirdparty / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
import gdb-1999-07-07 post reformat
[thirdparty/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 <unistd.h>
50 #include "gdb_stat.h"
51
52 #include "inferior.h"
53 #include "target.h"
54 #include "command.h"
55 #include "gdbcore.h"
56 #include "gdbthread.h"
57
58 #if !defined(SYS_lwp_create) && defined(SYS_lwpcreate)
59 #define SYS_lwp_create SYS_lwpcreate
60 #endif
61
62 #if !defined(SYS_lwp_exit) && defined(SYS_lwpexit)
63 #define SYS_lwp_exit SYS_lwpexit
64 #endif
65
66 #if !defined(SYS_lwp_wait) && defined(SYS_lwpwait)
67 #define SYS_lwp_wait SYS_lwpwait
68 #endif
69
70 #if !defined(SYS_lwp_self) && defined(SYS_lwpself)
71 #define SYS_lwp_self SYS_lwpself
72 #endif
73
74 #if !defined(SYS_lwp_info) && defined(SYS_lwpinfo)
75 #define SYS_lwp_info SYS_lwpinfo
76 #endif
77
78 #if !defined(SYS_lwp_private) && defined(SYS_lwpprivate)
79 #define SYS_lwp_private SYS_lwpprivate
80 #endif
81
82 #if !defined(SYS_lwp_kill) && defined(SYS_lwpkill)
83 #define SYS_lwp_kill SYS_lwpkill
84 #endif
85
86 #if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend)
87 #define SYS_lwp_suspend SYS_lwpsuspend
88 #endif
89
90 #if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue)
91 #define SYS_lwp_continue SYS_lwpcontinue
92 #endif
93
94 /* the name of the proc status struct depends on the implementation */
95 /* Wrap Light Weight Process member in THE_PR_LWP macro for clearer code */
96 #ifndef HAVE_PSTATUS_T
97 typedef prstatus_t gdb_prstatus_t;
98 #define THE_PR_LWP(a) a
99 #else /* HAVE_PSTATUS_T */
100 typedef pstatus_t gdb_prstatus_t;
101 #define THE_PR_LWP(a) a.pr_lwp
102 #if !defined(HAVE_PRRUN_T) && defined(HAVE_MULTIPLE_PROC_FDS)
103 /* Fallback definitions - for using configure information directly */
104 #ifndef UNIXWARE
105 #define UNIXWARE 1
106 #endif
107 #if !defined(PROCFS_USE_READ_WRITE) && !defined(HAVE_PROCFS_PIOCSET)
108 #define PROCFS_USE_READ_WRITE 1
109 #endif
110 #endif /* !HAVE_PRRUN_T && HAVE_MULTIPLE_PROC_FDS */
111 #endif /* HAVE_PSTATUS_T */
112
113 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
114
115 /* proc name formats may vary depending on the proc implementation */
116 #ifdef HAVE_MULTIPLE_PROC_FDS
117 #ifndef CTL_PROC_NAME_FMT
118 #define CTL_PROC_NAME_FMT "/proc/%d/ctl"
119 #define AS_PROC_NAME_FMT "/proc/%d/as"
120 #define MAP_PROC_NAME_FMT "/proc/%d/map"
121 #define STATUS_PROC_NAME_FMT "/proc/%d/status"
122 #endif
123 #else /* HAVE_MULTIPLE_PROC_FDS */
124 #ifndef CTL_PROC_NAME_FMT
125 #define CTL_PROC_NAME_FMT "/proc/%05d"
126 #define AS_PROC_NAME_FMT "/proc/%05d"
127 #define MAP_PROC_NAME_FMT "/proc/%05d"
128 #define STATUS_PROC_NAME_FMT "/proc/%05d"
129 #endif
130 #endif /* HAVE_MULTIPLE_PROC_FDS */
131
132
133 /* These #ifdefs are for sol2.x in particular. sol2.x has
134 both a "gregset_t" and a "prgregset_t", which have
135 similar uses but different layouts. sol2.x gdb tries to
136 use prgregset_t (and prfpregset_t) everywhere. */
137
138 #ifdef GDB_GREGSET_TYPE
139 typedef GDB_GREGSET_TYPE gdb_gregset_t;
140 #else
141 typedef gregset_t gdb_gregset_t;
142 #endif
143
144 #ifdef GDB_FPREGSET_TYPE
145 typedef GDB_FPREGSET_TYPE gdb_fpregset_t;
146 #else
147 typedef fpregset_t gdb_fpregset_t;
148 #endif
149
150
151 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
152
153 struct target_ops procfs_ops;
154
155 int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
156 be a runnable target. Used by targets
157 that can sit atop procfs, such as solaris
158 thread support. */
159
160 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
161 CORE_ADDR kernel_u_addr;
162 #endif
163
164 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
165 #undef si_pid
166 #define si_pid _data._proc.pid
167 #undef si_uid
168 #define si_uid _data._proc._pdata._kill.uid
169 #endif /* BROKEN_SIGINFO_H */
170
171 /* Define structures for passing commands to /proc/pid/ctl file. Note that
172 while we create these for the PROCFS_USE_READ_WRITE world, we use them
173 and ignore the extra cmd int in other proc schemes.
174 */
175 /* generic ctl msg */
176 struct proc_ctl
177 {
178 int cmd;
179 long data;
180 };
181
182 /* set general registers */
183 struct greg_ctl
184 {
185 int cmd;
186 gdb_gregset_t gregset;
187 };
188
189 /* set fp registers */
190 struct fpreg_ctl
191 {
192 int cmd;
193 gdb_fpregset_t fpregset;
194 };
195
196 /* set signals to be traced */
197 struct sig_ctl
198 {
199 int cmd;
200 sigset_t sigset;
201 };
202
203 /* set faults to be traced */
204 struct flt_ctl
205 {
206 int cmd;
207 fltset_t fltset;
208 };
209
210 /* set system calls to be traced */
211 struct sys_ctl
212 {
213 int cmd;
214 sysset_t sysset;
215 };
216
217 /* set current signal to be traced */
218 struct sigi_ctl
219 {
220 int cmd;
221 siginfo_t siginfo;
222 };
223
224 /* All access to the inferior, either one started by gdb or one that has
225 been attached to, is controlled by an instance of a procinfo structure,
226 defined below. Since gdb currently only handles one inferior at a time,
227 the procinfo structure for the inferior is statically allocated and
228 only one exists at any given time. There is a separate procinfo
229 structure for use by the "info proc" command, so that we can print
230 useful information about any random process without interfering with
231 the inferior's procinfo information. */
232
233 struct procinfo
234 {
235 struct procinfo *next;
236 int pid; /* Process ID of inferior */
237 int ctl_fd; /* File descriptor for /proc ctl file */
238 int status_fd; /* File descriptor for /proc status file */
239 int as_fd; /* File descriptor for /proc as file */
240 int map_fd; /* File descriptor for /proc map file */
241 char *pathname; /* Pathname to /proc entry */
242 int had_event; /* poll/select says something happened */
243 int was_stopped; /* Nonzero if was stopped prior to attach */
244 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
245 #ifdef HAVE_PRRUN_T
246 prrun_t prrun; /* Control state when it is run */
247 #endif
248 gdb_prstatus_t prstatus; /* Current process status info */
249 struct greg_ctl gregset; /* General register set */
250 struct fpreg_ctl fpregset; /* Floating point register set */
251 struct flt_ctl fltset; /* Current traced hardware fault set */
252 struct sig_ctl trace; /* Current traced signal set */
253 struct sys_ctl exitset; /* Current traced system call exit set */
254 struct sys_ctl entryset; /* Current traced system call entry set */
255 struct sig_ctl saved_sighold; /* Saved held signal set */
256 struct flt_ctl saved_fltset; /* Saved traced hardware fault set */
257 struct sig_ctl saved_trace; /* Saved traced signal set */
258 struct sys_ctl saved_exitset; /* Saved traced system call exit set */
259 struct sys_ctl saved_entryset; /* Saved traced system call entry set */
260 int num_syscall_handlers; /* Number of syscall trap handlers
261 currently installed */
262 /* Pointer to list of syscall trap handlers */
263 struct procfs_syscall_handler *syscall_handlers;
264 int saved_rtnval; /* return value and status for wait(), */
265 int saved_statval; /* as supplied by a syscall handler. */
266 int new_child; /* Non-zero if it's a new thread */
267 };
268
269 /* List of inferior process information */
270 static struct procinfo *procinfo_list = NULL;
271 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
272
273 static int num_poll_list = 0; /* Number of entries in poll_list */
274
275 /* Much of the information used in the /proc interface, particularly for
276 printing status information, is kept as tables of structures of the
277 following form. These tables can be used to map numeric values to
278 their symbolic names and to a string that describes their specific use. */
279
280 struct trans
281 {
282 int value; /* The numeric value */
283 char *name; /* The equivalent symbolic value */
284 char *desc; /* Short description of value */
285 };
286
287 /* Translate bits in the pr_flags member of the prstatus structure, into the
288 names and desc information. */
289
290 static struct trans pr_flag_table[] =
291 {
292 #if defined (PR_STOPPED)
293 {PR_STOPPED, "PR_STOPPED", "Process is stopped"},
294 #endif
295 #if defined (PR_ISTOP)
296 {PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest"},
297 #endif
298 #if defined (PR_DSTOP)
299 {PR_DSTOP, "PR_DSTOP", "A stop directive is in effect"},
300 #endif
301 #if defined (PR_ASLEEP)
302 {PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call"},
303 #endif
304 #if defined (PR_FORK)
305 {PR_FORK, "PR_FORK", "Inherit-on-fork is in effect"},
306 #endif
307 #if defined (PR_RLC)
308 {PR_RLC, "PR_RLC", "Run-on-last-close is in effect"},
309 #endif
310 #if defined (PR_PTRACE)
311 {PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace"},
312 #endif
313 #if defined (PR_PCINVAL)
314 {PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address"},
315 #endif
316 #if defined (PR_ISSYS)
317 {PR_ISSYS, "PR_ISSYS", "Is a system process"},
318 #endif
319 #if defined (PR_STEP)
320 {PR_STEP, "PR_STEP", "Process has single step pending"},
321 #endif
322 #if defined (PR_KLC)
323 {PR_KLC, "PR_KLC", "Kill-on-last-close is in effect"},
324 #endif
325 #if defined (PR_ASYNC)
326 {PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect"},
327 #endif
328 #if defined (PR_PCOMPAT)
329 {PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect"},
330 #endif
331 #if defined (PR_MSACCT)
332 {PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled"},
333 #endif
334 #if defined (PR_BPTADJ)
335 {PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect"},
336 #endif
337 #if defined (PR_ASLWP)
338 {PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP"},
339 #endif
340 {0, NULL, NULL}
341 };
342
343 /* Translate values in the pr_why field of the prstatus struct. */
344
345 static struct trans pr_why_table[] =
346 {
347 #if defined (PR_REQUESTED)
348 {PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP"},
349 #endif
350 #if defined (PR_SIGNALLED)
351 {PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal"},
352 #endif
353 #if defined (PR_SYSENTRY)
354 {PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call"},
355 #endif
356 #if defined (PR_SYSEXIT)
357 {PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call"},
358 #endif
359 #if defined (PR_JOBCONTROL)
360 {PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action"},
361 #endif
362 #if defined (PR_FAULTED)
363 {PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault"},
364 #endif
365 #if defined (PR_SUSPENDED)
366 {PR_SUSPENDED, "PR_SUSPENDED", "Process suspended"},
367 #endif
368 #if defined (PR_CHECKPOINT)
369 {PR_CHECKPOINT, "PR_CHECKPOINT", "(???)"},
370 #endif
371 {0, NULL, NULL}
372 };
373
374 /* Hardware fault translation table. */
375
376 static struct trans faults_table[] =
377 {
378 #if defined (FLTILL)
379 {FLTILL, "FLTILL", "Illegal instruction"},
380 #endif
381 #if defined (FLTPRIV)
382 {FLTPRIV, "FLTPRIV", "Privileged instruction"},
383 #endif
384 #if defined (FLTBPT)
385 {FLTBPT, "FLTBPT", "Breakpoint trap"},
386 #endif
387 #if defined (FLTTRACE)
388 {FLTTRACE, "FLTTRACE", "Trace trap"},
389 #endif
390 #if defined (FLTACCESS)
391 {FLTACCESS, "FLTACCESS", "Memory access fault"},
392 #endif
393 #if defined (FLTBOUNDS)
394 {FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation"},
395 #endif
396 #if defined (FLTIOVF)
397 {FLTIOVF, "FLTIOVF", "Integer overflow"},
398 #endif
399 #if defined (FLTIZDIV)
400 {FLTIZDIV, "FLTIZDIV", "Integer zero divide"},
401 #endif
402 #if defined (FLTFPE)
403 {FLTFPE, "FLTFPE", "Floating-point exception"},
404 #endif
405 #if defined (FLTSTACK)
406 {FLTSTACK, "FLTSTACK", "Unrecoverable stack fault"},
407 #endif
408 #if defined (FLTPAGE)
409 {FLTPAGE, "FLTPAGE", "Recoverable page fault"},
410 #endif
411 {0, NULL, NULL}
412 };
413
414 /* Translation table for signal generation information. See UNIX System
415 V Release 4 Programmer's Reference Manual, siginfo(5). */
416
417 static struct sigcode
418 {
419 int signo;
420 int code;
421 char *codename;
422 char *desc;
423 }
424 siginfo_table[] =
425 {
426 #if defined (SIGILL) && defined (ILL_ILLOPC)
427 {
428 SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode"
429 }
430 ,
431 #endif
432 #if defined (SIGILL) && defined (ILL_ILLOPN)
433 {
434 SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
435 }
436 ,
437 #endif
438 #if defined (SIGILL) && defined (ILL_ILLADR)
439 {
440 SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode"
441 }
442 ,
443 #endif
444 #if defined (SIGILL) && defined (ILL_ILLTRP)
445 {
446 SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap"
447 }
448 ,
449 #endif
450 #if defined (SIGILL) && defined (ILL_PRVOPC)
451 {
452 SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode"
453 }
454 ,
455 #endif
456 #if defined (SIGILL) && defined (ILL_PRVREG)
457 {
458 SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register"
459 }
460 ,
461 #endif
462 #if defined (SIGILL) && defined (ILL_COPROC)
463 {
464 SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error"
465 }
466 ,
467 #endif
468 #if defined (SIGILL) && defined (ILL_BADSTK)
469 {
470 SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error"
471 }
472 ,
473 #endif
474 #if defined (SIGFPE) && defined (FPE_INTDIV)
475 {
476 SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero"
477 }
478 ,
479 #endif
480 #if defined (SIGFPE) && defined (FPE_INTOVF)
481 {
482 SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow"
483 }
484 ,
485 #endif
486 #if defined (SIGFPE) && defined (FPE_FLTDIV)
487 {
488 SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero"
489 }
490 ,
491 #endif
492 #if defined (SIGFPE) && defined (FPE_FLTOVF)
493 {
494 SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow"
495 }
496 ,
497 #endif
498 #if defined (SIGFPE) && defined (FPE_FLTUND)
499 {
500 SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow"
501 }
502 ,
503 #endif
504 #if defined (SIGFPE) && defined (FPE_FLTRES)
505 {
506 SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result"
507 }
508 ,
509 #endif
510 #if defined (SIGFPE) && defined (FPE_FLTINV)
511 {
512 SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation"
513 }
514 ,
515 #endif
516 #if defined (SIGFPE) && defined (FPE_FLTSUB)
517 {
518 SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range"
519 }
520 ,
521 #endif
522 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
523 {
524 SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object"
525 }
526 ,
527 #endif
528 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
529 {
530 SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object"
531 }
532 ,
533 #endif
534 #if defined (SIGBUS) && defined (BUS_ADRALN)
535 {
536 SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment"
537 }
538 ,
539 #endif
540 #if defined (SIGBUS) && defined (BUS_ADRERR)
541 {
542 SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address"
543 }
544 ,
545 #endif
546 #if defined (SIGBUS) && defined (BUS_OBJERR)
547 {
548 SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error"
549 }
550 ,
551 #endif
552 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
553 {
554 SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint"
555 }
556 ,
557 #endif
558 #if defined (SIGTRAP) && defined (TRAP_TRACE)
559 {
560 SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap"
561 }
562 ,
563 #endif
564 #if defined (SIGCLD) && defined (CLD_EXITED)
565 {
566 SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited"
567 }
568 ,
569 #endif
570 #if defined (SIGCLD) && defined (CLD_KILLED)
571 {
572 SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed"
573 }
574 ,
575 #endif
576 #if defined (SIGCLD) && defined (CLD_DUMPED)
577 {
578 SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally"
579 }
580 ,
581 #endif
582 #if defined (SIGCLD) && defined (CLD_TRAPPED)
583 {
584 SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped"
585 }
586 ,
587 #endif
588 #if defined (SIGCLD) && defined (CLD_STOPPED)
589 {
590 SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped"
591 }
592 ,
593 #endif
594 #if defined (SIGCLD) && defined (CLD_CONTINUED)
595 {
596 SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued"
597 }
598 ,
599 #endif
600 #if defined (SIGPOLL) && defined (POLL_IN)
601 {
602 SIGPOLL, POLL_IN, "POLL_IN", "Input input available"
603 }
604 ,
605 #endif
606 #if defined (SIGPOLL) && defined (POLL_OUT)
607 {
608 SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available"
609 }
610 ,
611 #endif
612 #if defined (SIGPOLL) && defined (POLL_MSG)
613 {
614 SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available"
615 }
616 ,
617 #endif
618 #if defined (SIGPOLL) && defined (POLL_ERR)
619 {
620 SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error"
621 }
622 ,
623 #endif
624 #if defined (SIGPOLL) && defined (POLL_PRI)
625 {
626 SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available"
627 }
628 ,
629 #endif
630 #if defined (SIGPOLL) && defined (POLL_HUP)
631 {
632 SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected"
633 }
634 ,
635 #endif
636 {
637 0, 0, NULL, NULL
638 }
639 };
640
641 static char *syscall_table[MAX_SYSCALLS];
642
643 /* Prototypes for local functions */
644
645 static void procfs_stop PARAMS ((void));
646
647 static int procfs_thread_alive PARAMS ((int));
648
649 static int procfs_can_run PARAMS ((void));
650
651 static void procfs_mourn_inferior PARAMS ((void));
652
653 static void procfs_fetch_registers PARAMS ((int));
654
655 static int procfs_wait PARAMS ((int, struct target_waitstatus *));
656
657 static void procfs_open PARAMS ((char *, int));
658
659 static void procfs_files_info PARAMS ((struct target_ops *));
660
661 static void procfs_prepare_to_store PARAMS ((void));
662
663 static void procfs_detach PARAMS ((char *, int));
664
665 static void procfs_attach PARAMS ((char *, int));
666
667 static void proc_set_exec_trap PARAMS ((void));
668
669 static void procfs_init_inferior PARAMS ((int));
670
671 static struct procinfo *create_procinfo PARAMS ((int));
672
673 static void procfs_store_registers PARAMS ((int));
674
675 static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
676
677 static void procfs_kill_inferior PARAMS ((void));
678
679 static char *sigcodedesc PARAMS ((siginfo_t *));
680
681 static char *sigcodename PARAMS ((siginfo_t *));
682
683 static struct procinfo *wait_fd PARAMS ((void));
684
685 static void remove_fd PARAMS ((struct procinfo *));
686
687 static void add_fd PARAMS ((struct procinfo *));
688
689 static void set_proc_siginfo PARAMS ((struct procinfo *, int));
690
691 static void init_syscall_table PARAMS ((void));
692
693 static char *syscallname PARAMS ((int));
694
695 static char *signalname PARAMS ((int));
696
697 static char *errnoname PARAMS ((int));
698
699 static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
700
701 static int open_proc_file PARAMS ((int, struct procinfo *, int, int));
702
703 static void close_proc_file PARAMS ((struct procinfo *));
704
705 static void close_proc_file_cleanup PARAMS ((void *));
706
707 static struct cleanup *make_cleanup_close_proc_file PARAMS ((struct procinfo *));
708
709 static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
710
711 static NORETURN void proc_init_failed
712 PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN;
713
714 static void info_proc PARAMS ((char *, int));
715
716 static void info_proc_flags PARAMS ((struct procinfo *, int));
717
718 static void info_proc_stop PARAMS ((struct procinfo *, int));
719
720 static void info_proc_siginfo PARAMS ((struct procinfo *, int));
721
722 static void info_proc_syscalls PARAMS ((struct procinfo *, int));
723
724 static void info_proc_mappings PARAMS ((struct procinfo *, int));
725
726 static void info_proc_signals PARAMS ((struct procinfo *, int));
727
728 static void info_proc_faults PARAMS ((struct procinfo *, int));
729
730 static char *mappingflags PARAMS ((long));
731
732 static char *lookupname PARAMS ((struct trans *, unsigned int, char *));
733
734 static char *lookupdesc PARAMS ((struct trans *, unsigned int));
735
736 static int do_attach PARAMS ((int pid));
737
738 static void do_detach PARAMS ((int siggnal));
739
740 static void procfs_create_inferior PARAMS ((char *, char *, char **));
741
742 static void procfs_notice_signals PARAMS ((int pid));
743
744 static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *));
745
746 static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
747
748 static int procfs_write_pcwstop PARAMS ((struct procinfo *));
749 static int procfs_read_status PARAMS ((struct procinfo *));
750 static void procfs_write_pckill PARAMS ((struct procinfo *));
751
752 typedef int syscall_func_t PARAMS ((struct procinfo * pi, int syscall_num,
753 int why, int *rtnval, int *statval));
754
755 static void procfs_set_syscall_trap PARAMS ((struct procinfo * pi,
756 int syscall_num, int flags,
757 syscall_func_t * func));
758
759 static void procfs_clear_syscall_trap PARAMS ((struct procinfo * pi,
760 int syscall_num, int errok));
761
762 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
763 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
764
765 static syscall_func_t procfs_exit_handler;
766
767 static syscall_func_t procfs_exec_handler;
768
769 #ifdef SYS_sproc
770 static syscall_func_t procfs_sproc_handler;
771 static syscall_func_t procfs_fork_handler;
772 #endif
773
774 #ifdef SYS_lwp_create
775 static syscall_func_t procfs_lwp_creation_handler;
776 #endif
777
778 static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag));
779 static void modify_run_on_last_close_flag PARAMS ((int fd, int flag));
780
781 /* */
782
783 struct procfs_syscall_handler
784 {
785 int syscall_num; /* The number of the system call being handled */
786 /* The function to be called */
787 syscall_func_t *func;
788 };
789
790 static void procfs_resume PARAMS ((int pid, int step,
791 enum target_signal signo));
792
793 static void init_procfs_ops PARAMS ((void));
794
795 /* External function prototypes that can't be easily included in any
796 header file because the args are typedefs in system include files. */
797
798 extern void supply_gregset PARAMS ((gdb_gregset_t *));
799
800 extern void fill_gregset PARAMS ((gdb_gregset_t *, int));
801
802 #ifdef FP0_REGNUM
803 extern void supply_fpregset PARAMS ((gdb_fpregset_t *));
804
805 extern void fill_fpregset PARAMS ((gdb_fpregset_t *, int));
806 #endif
807
808 /*
809
810 LOCAL FUNCTION
811
812 find_procinfo -- convert a process id to a struct procinfo
813
814 SYNOPSIS
815
816 static struct procinfo * find_procinfo (pid_t pid, int okfail);
817
818 DESCRIPTION
819
820 Given a process id, look it up in the procinfo chain. Returns
821 a struct procinfo *. If can't find pid, then call error(),
822 unless okfail is set, in which case, return NULL;
823 */
824
825 static struct procinfo *
826 find_procinfo (pid, okfail)
827 pid_t pid;
828 int okfail;
829 {
830 struct procinfo *procinfo;
831
832 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
833 if (procinfo->pid == pid)
834 return procinfo;
835
836 if (okfail)
837 return NULL;
838
839 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
840 }
841
842 /*
843
844 LOCAL MACRO
845
846 current_procinfo -- convert inferior_pid to a struct procinfo
847
848 SYNOPSIS
849
850 static struct procinfo * current_procinfo;
851
852 DESCRIPTION
853
854 Looks up inferior_pid in the procinfo chain. Always returns a
855 struct procinfo *. If process can't be found, we error() out.
856 */
857
858 #define current_procinfo find_procinfo (inferior_pid, 0)
859
860 /*
861
862 LOCAL FUNCTION
863
864 add_fd -- Add the fd to the poll/select list
865
866 SYNOPSIS
867
868 static void add_fd (struct procinfo *);
869
870 DESCRIPTION
871
872 Add the fd of the supplied procinfo to the list of fds used for
873 poll/select operations.
874 */
875
876 static void
877 add_fd (pi)
878 struct procinfo *pi;
879 {
880 if (num_poll_list <= 0)
881 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
882 else
883 poll_list = (struct pollfd *) xrealloc (poll_list,
884 (num_poll_list + 1)
885 * sizeof (struct pollfd));
886 poll_list[num_poll_list].fd = pi->ctl_fd;
887 #ifdef UNIXWARE
888 poll_list[num_poll_list].events = POLLWRNORM;
889 #else
890 poll_list[num_poll_list].events = POLLPRI;
891 #endif
892
893 num_poll_list++;
894 }
895
896 /*
897
898 LOCAL FUNCTION
899
900 remove_fd -- Remove the fd from the poll/select list
901
902 SYNOPSIS
903
904 static void remove_fd (struct procinfo *);
905
906 DESCRIPTION
907
908 Remove the fd of the supplied procinfo from the list of fds used
909 for poll/select operations.
910 */
911
912 static void
913 remove_fd (pi)
914 struct procinfo *pi;
915 {
916 int i;
917
918 for (i = 0; i < num_poll_list; i++)
919 {
920 if (poll_list[i].fd == pi->ctl_fd)
921 {
922 if (i != num_poll_list - 1)
923 memcpy (poll_list + i, poll_list + i + 1,
924 (num_poll_list - i - 1) * sizeof (struct pollfd));
925
926 num_poll_list--;
927
928 if (num_poll_list == 0)
929 free (poll_list);
930 else
931 poll_list = (struct pollfd *) xrealloc (poll_list,
932 num_poll_list
933 * sizeof (struct pollfd));
934 return;
935 }
936 }
937 }
938
939 /*
940
941 LOCAL FUNCTION
942
943 procfs_read_status - get procfs fd status
944
945 SYNOPSIS
946
947 static int procfs_read_status (pi) struct procinfo *pi;
948
949 DESCRIPTION
950
951 Given a pointer to a procinfo struct, get the status of
952 the status_fd in the appropriate way. Returns 0 on failure,
953 1 on success.
954 */
955
956 static int
957 procfs_read_status (pi)
958 struct procinfo *pi;
959 {
960 #ifdef PROCFS_USE_READ_WRITE
961 if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) ||
962 (read (pi->status_fd, (char *) &pi->prstatus,
963 sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t)))
964 #else
965 if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0)
966 #endif
967 return 0;
968 else
969 return 1;
970 }
971
972 /*
973
974 LOCAL FUNCTION
975
976 procfs_write_pcwstop - send a PCWSTOP to procfs fd
977
978 SYNOPSIS
979
980 static int procfs_write_pcwstop (pi) struct procinfo *pi;
981
982 DESCRIPTION
983
984 Given a pointer to a procinfo struct, send a PCWSTOP to
985 the ctl_fd in the appropriate way. Returns 0 on failure,
986 1 on success.
987 */
988
989 static int
990 procfs_write_pcwstop (pi)
991 struct procinfo *pi;
992 {
993 #ifdef PROCFS_USE_READ_WRITE
994 long cmd = PCWSTOP;
995 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
996 #else
997 if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0)
998 #endif
999 return 0;
1000 else
1001 return 1;
1002 }
1003
1004 /*
1005
1006 LOCAL FUNCTION
1007
1008 procfs_write_pckill - send a kill to procfs fd
1009
1010 SYNOPSIS
1011
1012 static void procfs_write_pckill (pi) struct procinfo *pi;
1013
1014 DESCRIPTION
1015
1016 Given a pointer to a procinfo struct, send a kill to
1017 the ctl_fd in the appropriate way. Returns 0 on failure,
1018 1 on success.
1019 */
1020
1021 static void
1022 procfs_write_pckill (pi)
1023 struct procinfo *pi;
1024 {
1025 #ifdef PROCFS_USE_READ_WRITE
1026 struct proc_ctl pctl;
1027 pctl.cmd = PCKILL;
1028 pctl.data = SIGKILL;
1029 write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl));
1030 #else
1031 int signo = SIGKILL;
1032 ioctl (pi->ctl_fd, PIOCKILL, &signo);
1033 #endif
1034 }
1035
1036 static struct procinfo *
1037 wait_fd ()
1038 {
1039 struct procinfo *pi, *next_pi;
1040 #ifndef LOSING_POLL
1041 int num_fds;
1042 int i;
1043 #endif
1044
1045 set_sigint_trap (); /* Causes SIGINT to be passed on to the
1046 attached process. */
1047 set_sigio_trap ();
1048
1049 wait_again:
1050 #ifndef LOSING_POLL
1051 while (1)
1052 {
1053 num_fds = poll (poll_list, num_poll_list, -1);
1054 if (num_fds > 0)
1055 break;
1056 if (num_fds < 0 && errno == EINTR)
1057 continue;
1058 print_sys_errmsg ("poll failed", errno);
1059 error ("Poll failed, returned %d", num_fds);
1060 }
1061 #else /* LOSING_POLL */
1062 pi = current_procinfo;
1063
1064 while (!procfs_write_pcwstop (pi))
1065 {
1066 if (errno == ENOENT)
1067 {
1068 /* Process exited. */
1069 pi->prstatus.pr_flags = 0;
1070 break;
1071 }
1072 else if (errno != EINTR)
1073 {
1074 print_sys_errmsg (pi->pathname, errno);
1075 error ("procfs_write_pcwstop failed");
1076 }
1077 }
1078 pi->had_event = 1;
1079 #endif /* LOSING_POLL */
1080
1081 clear_sigint_trap ();
1082 clear_sigio_trap ();
1083
1084 #ifndef LOSING_POLL
1085
1086 for (i = 0; i < num_poll_list && num_fds > 0; i++)
1087 {
1088 if (0 == (poll_list[i].revents &
1089 (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL)))
1090 continue;
1091 for (pi = procinfo_list; pi; pi = next_pi)
1092 {
1093 next_pi = pi->next;
1094 if (poll_list[i].fd == pi->ctl_fd)
1095 {
1096 num_fds--;
1097 if ((poll_list[i].revents & POLLHUP) != 0 ||
1098 !procfs_read_status (pi))
1099 { /* The LWP has apparently terminated. */
1100 if (num_poll_list <= 1)
1101 {
1102 pi->prstatus.pr_flags = 0;
1103 pi->had_event = 1;
1104 break;
1105 }
1106 if (info_verbose)
1107 printf_filtered ("LWP %d exited.\n",
1108 (pi->pid >> 16) & 0xffff);
1109 close_proc_file (pi);
1110 i--; /* don't skip deleted entry */
1111 if (num_fds != 0)
1112 break; /* already another event to process */
1113 else
1114 goto wait_again; /* wait for another event */
1115 }
1116 pi->had_event = 1;
1117 break;
1118 }
1119 }
1120 if (!pi)
1121 error ("wait_fd: Couldn't find procinfo for fd %d\n",
1122 poll_list[i].fd);
1123 }
1124 #endif /* LOSING_POLL */
1125
1126 return pi;
1127 }
1128
1129 /*
1130
1131 LOCAL FUNCTION
1132
1133 lookupdesc -- translate a value to a summary desc string
1134
1135 SYNOPSIS
1136
1137 static char *lookupdesc (struct trans *transp, unsigned int val);
1138
1139 DESCRIPTION
1140
1141 Given a pointer to a translation table and a value to be translated,
1142 lookup the desc string and return it.
1143 */
1144
1145 static char *
1146 lookupdesc (transp, val)
1147 struct trans *transp;
1148 unsigned int val;
1149 {
1150 char *desc;
1151
1152 for (desc = NULL; transp->name != NULL; transp++)
1153 {
1154 if (transp->value == val)
1155 {
1156 desc = transp->desc;
1157 break;
1158 }
1159 }
1160
1161 /* Didn't find a translation for the specified value, set a default one. */
1162
1163 if (desc == NULL)
1164 {
1165 desc = "Unknown";
1166 }
1167 return (desc);
1168 }
1169
1170 /*
1171
1172 LOCAL FUNCTION
1173
1174 lookupname -- translate a value to symbolic name
1175
1176 SYNOPSIS
1177
1178 static char *lookupname (struct trans *transp, unsigned int val,
1179 char *prefix);
1180
1181 DESCRIPTION
1182
1183 Given a pointer to a translation table, a value to be translated,
1184 and a default prefix to return if the value can't be translated,
1185 match the value with one of the translation table entries and
1186 return a pointer to the symbolic name.
1187
1188 If no match is found it just returns the value as a printable string,
1189 with the given prefix. The previous such value, if any, is freed
1190 at this time.
1191 */
1192
1193 static char *
1194 lookupname (transp, val, prefix)
1195 struct trans *transp;
1196 unsigned int val;
1197 char *prefix;
1198 {
1199 static char *locbuf;
1200 char *name;
1201
1202 for (name = NULL; transp->name != NULL; transp++)
1203 {
1204 if (transp->value == val)
1205 {
1206 name = transp->name;
1207 break;
1208 }
1209 }
1210
1211 /* Didn't find a translation for the specified value, build a default
1212 one using the specified prefix and return it. The lifetime of
1213 the value is only until the next one is needed. */
1214
1215 if (name == NULL)
1216 {
1217 if (locbuf != NULL)
1218 {
1219 free (locbuf);
1220 }
1221 locbuf = xmalloc (strlen (prefix) + 16);
1222 sprintf (locbuf, "%s %u", prefix, val);
1223 name = locbuf;
1224 }
1225 return (name);
1226 }
1227
1228 static char *
1229 sigcodename (sip)
1230 siginfo_t *sip;
1231 {
1232 struct sigcode *scp;
1233 char *name = NULL;
1234 static char locbuf[32];
1235
1236 for (scp = siginfo_table; scp->codename != NULL; scp++)
1237 {
1238 if ((scp->signo == sip->si_signo) &&
1239 (scp->code == sip->si_code))
1240 {
1241 name = scp->codename;
1242 break;
1243 }
1244 }
1245 if (name == NULL)
1246 {
1247 sprintf (locbuf, "sigcode %u", sip->si_signo);
1248 name = locbuf;
1249 }
1250 return (name);
1251 }
1252
1253 static char *
1254 sigcodedesc (sip)
1255 siginfo_t *sip;
1256 {
1257 struct sigcode *scp;
1258 char *desc = NULL;
1259
1260 for (scp = siginfo_table; scp->codename != NULL; scp++)
1261 {
1262 if ((scp->signo == sip->si_signo) &&
1263 (scp->code == sip->si_code))
1264 {
1265 desc = scp->desc;
1266 break;
1267 }
1268 }
1269 if (desc == NULL)
1270 {
1271 desc = "Unrecognized signal or trap use";
1272 }
1273 return (desc);
1274 }
1275
1276 /*
1277
1278 LOCAL FUNCTION
1279
1280 syscallname - translate a system call number into a system call name
1281
1282 SYNOPSIS
1283
1284 char *syscallname (int syscallnum)
1285
1286 DESCRIPTION
1287
1288 Given a system call number, translate it into the printable name
1289 of a system call, or into "syscall <num>" if it is an unknown
1290 number.
1291 */
1292
1293 static char *
1294 syscallname (syscallnum)
1295 int syscallnum;
1296 {
1297 static char locbuf[32];
1298
1299 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS
1300 && syscall_table[syscallnum] != NULL)
1301 return syscall_table[syscallnum];
1302 else
1303 {
1304 sprintf (locbuf, "syscall %u", syscallnum);
1305 return locbuf;
1306 }
1307 }
1308
1309 /*
1310
1311 LOCAL FUNCTION
1312
1313 init_syscall_table - initialize syscall translation table
1314
1315 SYNOPSIS
1316
1317 void init_syscall_table (void)
1318
1319 DESCRIPTION
1320
1321 Dynamically initialize the translation table to convert system
1322 call numbers into printable system call names. Done once per
1323 gdb run, on initialization.
1324
1325 NOTES
1326
1327 This is awfully ugly, but preprocessor tricks to make it prettier
1328 tend to be nonportable.
1329 */
1330
1331 static void
1332 init_syscall_table ()
1333 {
1334 #if defined (SYS_exit)
1335 syscall_table[SYS_exit] = "exit";
1336 #endif
1337 #if defined (SYS_fork)
1338 syscall_table[SYS_fork] = "fork";
1339 #endif
1340 #if defined (SYS_read)
1341 syscall_table[SYS_read] = "read";
1342 #endif
1343 #if defined (SYS_write)
1344 syscall_table[SYS_write] = "write";
1345 #endif
1346 #if defined (SYS_open)
1347 syscall_table[SYS_open] = "open";
1348 #endif
1349 #if defined (SYS_close)
1350 syscall_table[SYS_close] = "close";
1351 #endif
1352 #if defined (SYS_wait)
1353 syscall_table[SYS_wait] = "wait";
1354 #endif
1355 #if defined (SYS_creat)
1356 syscall_table[SYS_creat] = "creat";
1357 #endif
1358 #if defined (SYS_link)
1359 syscall_table[SYS_link] = "link";
1360 #endif
1361 #if defined (SYS_unlink)
1362 syscall_table[SYS_unlink] = "unlink";
1363 #endif
1364 #if defined (SYS_exec)
1365 syscall_table[SYS_exec] = "exec";
1366 #endif
1367 #if defined (SYS_execv)
1368 syscall_table[SYS_execv] = "execv";
1369 #endif
1370 #if defined (SYS_execve)
1371 syscall_table[SYS_execve] = "execve";
1372 #endif
1373 #if defined (SYS_chdir)
1374 syscall_table[SYS_chdir] = "chdir";
1375 #endif
1376 #if defined (SYS_time)
1377 syscall_table[SYS_time] = "time";
1378 #endif
1379 #if defined (SYS_mknod)
1380 syscall_table[SYS_mknod] = "mknod";
1381 #endif
1382 #if defined (SYS_chmod)
1383 syscall_table[SYS_chmod] = "chmod";
1384 #endif
1385 #if defined (SYS_chown)
1386 syscall_table[SYS_chown] = "chown";
1387 #endif
1388 #if defined (SYS_brk)
1389 syscall_table[SYS_brk] = "brk";
1390 #endif
1391 #if defined (SYS_stat)
1392 syscall_table[SYS_stat] = "stat";
1393 #endif
1394 #if defined (SYS_lseek)
1395 syscall_table[SYS_lseek] = "lseek";
1396 #endif
1397 #if defined (SYS_getpid)
1398 syscall_table[SYS_getpid] = "getpid";
1399 #endif
1400 #if defined (SYS_mount)
1401 syscall_table[SYS_mount] = "mount";
1402 #endif
1403 #if defined (SYS_umount)
1404 syscall_table[SYS_umount] = "umount";
1405 #endif
1406 #if defined (SYS_setuid)
1407 syscall_table[SYS_setuid] = "setuid";
1408 #endif
1409 #if defined (SYS_getuid)
1410 syscall_table[SYS_getuid] = "getuid";
1411 #endif
1412 #if defined (SYS_stime)
1413 syscall_table[SYS_stime] = "stime";
1414 #endif
1415 #if defined (SYS_ptrace)
1416 syscall_table[SYS_ptrace] = "ptrace";
1417 #endif
1418 #if defined (SYS_alarm)
1419 syscall_table[SYS_alarm] = "alarm";
1420 #endif
1421 #if defined (SYS_fstat)
1422 syscall_table[SYS_fstat] = "fstat";
1423 #endif
1424 #if defined (SYS_pause)
1425 syscall_table[SYS_pause] = "pause";
1426 #endif
1427 #if defined (SYS_utime)
1428 syscall_table[SYS_utime] = "utime";
1429 #endif
1430 #if defined (SYS_stty)
1431 syscall_table[SYS_stty] = "stty";
1432 #endif
1433 #if defined (SYS_gtty)
1434 syscall_table[SYS_gtty] = "gtty";
1435 #endif
1436 #if defined (SYS_access)
1437 syscall_table[SYS_access] = "access";
1438 #endif
1439 #if defined (SYS_nice)
1440 syscall_table[SYS_nice] = "nice";
1441 #endif
1442 #if defined (SYS_statfs)
1443 syscall_table[SYS_statfs] = "statfs";
1444 #endif
1445 #if defined (SYS_sync)
1446 syscall_table[SYS_sync] = "sync";
1447 #endif
1448 #if defined (SYS_kill)
1449 syscall_table[SYS_kill] = "kill";
1450 #endif
1451 #if defined (SYS_fstatfs)
1452 syscall_table[SYS_fstatfs] = "fstatfs";
1453 #endif
1454 #if defined (SYS_pgrpsys)
1455 syscall_table[SYS_pgrpsys] = "pgrpsys";
1456 #endif
1457 #if defined (SYS_xenix)
1458 syscall_table[SYS_xenix] = "xenix";
1459 #endif
1460 #if defined (SYS_dup)
1461 syscall_table[SYS_dup] = "dup";
1462 #endif
1463 #if defined (SYS_pipe)
1464 syscall_table[SYS_pipe] = "pipe";
1465 #endif
1466 #if defined (SYS_times)
1467 syscall_table[SYS_times] = "times";
1468 #endif
1469 #if defined (SYS_profil)
1470 syscall_table[SYS_profil] = "profil";
1471 #endif
1472 #if defined (SYS_plock)
1473 syscall_table[SYS_plock] = "plock";
1474 #endif
1475 #if defined (SYS_setgid)
1476 syscall_table[SYS_setgid] = "setgid";
1477 #endif
1478 #if defined (SYS_getgid)
1479 syscall_table[SYS_getgid] = "getgid";
1480 #endif
1481 #if defined (SYS_signal)
1482 syscall_table[SYS_signal] = "signal";
1483 #endif
1484 #if defined (SYS_msgsys)
1485 syscall_table[SYS_msgsys] = "msgsys";
1486 #endif
1487 #if defined (SYS_sys3b)
1488 syscall_table[SYS_sys3b] = "sys3b";
1489 #endif
1490 #if defined (SYS_sysi86)
1491 syscall_table[SYS_sysi86] = "sysi86";
1492 #endif
1493 #if defined (SYS_acct)
1494 syscall_table[SYS_acct] = "acct";
1495 #endif
1496 #if defined (SYS_shmsys)
1497 syscall_table[SYS_shmsys] = "shmsys";
1498 #endif
1499 #if defined (SYS_semsys)
1500 syscall_table[SYS_semsys] = "semsys";
1501 #endif
1502 #if defined (SYS_ioctl)
1503 syscall_table[SYS_ioctl] = "ioctl";
1504 #endif
1505 #if defined (SYS_uadmin)
1506 syscall_table[SYS_uadmin] = "uadmin";
1507 #endif
1508 #if defined (SYS_utssys)
1509 syscall_table[SYS_utssys] = "utssys";
1510 #endif
1511 #if defined (SYS_fsync)
1512 syscall_table[SYS_fsync] = "fsync";
1513 #endif
1514 #if defined (SYS_umask)
1515 syscall_table[SYS_umask] = "umask";
1516 #endif
1517 #if defined (SYS_chroot)
1518 syscall_table[SYS_chroot] = "chroot";
1519 #endif
1520 #if defined (SYS_fcntl)
1521 syscall_table[SYS_fcntl] = "fcntl";
1522 #endif
1523 #if defined (SYS_ulimit)
1524 syscall_table[SYS_ulimit] = "ulimit";
1525 #endif
1526 #if defined (SYS_rfsys)
1527 syscall_table[SYS_rfsys] = "rfsys";
1528 #endif
1529 #if defined (SYS_rmdir)
1530 syscall_table[SYS_rmdir] = "rmdir";
1531 #endif
1532 #if defined (SYS_mkdir)
1533 syscall_table[SYS_mkdir] = "mkdir";
1534 #endif
1535 #if defined (SYS_getdents)
1536 syscall_table[SYS_getdents] = "getdents";
1537 #endif
1538 #if defined (SYS_sysfs)
1539 syscall_table[SYS_sysfs] = "sysfs";
1540 #endif
1541 #if defined (SYS_getmsg)
1542 syscall_table[SYS_getmsg] = "getmsg";
1543 #endif
1544 #if defined (SYS_putmsg)
1545 syscall_table[SYS_putmsg] = "putmsg";
1546 #endif
1547 #if defined (SYS_poll)
1548 syscall_table[SYS_poll] = "poll";
1549 #endif
1550 #if defined (SYS_lstat)
1551 syscall_table[SYS_lstat] = "lstat";
1552 #endif
1553 #if defined (SYS_symlink)
1554 syscall_table[SYS_symlink] = "symlink";
1555 #endif
1556 #if defined (SYS_readlink)
1557 syscall_table[SYS_readlink] = "readlink";
1558 #endif
1559 #if defined (SYS_setgroups)
1560 syscall_table[SYS_setgroups] = "setgroups";
1561 #endif
1562 #if defined (SYS_getgroups)
1563 syscall_table[SYS_getgroups] = "getgroups";
1564 #endif
1565 #if defined (SYS_fchmod)
1566 syscall_table[SYS_fchmod] = "fchmod";
1567 #endif
1568 #if defined (SYS_fchown)
1569 syscall_table[SYS_fchown] = "fchown";
1570 #endif
1571 #if defined (SYS_sigprocmask)
1572 syscall_table[SYS_sigprocmask] = "sigprocmask";
1573 #endif
1574 #if defined (SYS_sigsuspend)
1575 syscall_table[SYS_sigsuspend] = "sigsuspend";
1576 #endif
1577 #if defined (SYS_sigaltstack)
1578 syscall_table[SYS_sigaltstack] = "sigaltstack";
1579 #endif
1580 #if defined (SYS_sigaction)
1581 syscall_table[SYS_sigaction] = "sigaction";
1582 #endif
1583 #if defined (SYS_sigpending)
1584 syscall_table[SYS_sigpending] = "sigpending";
1585 #endif
1586 #if defined (SYS_context)
1587 syscall_table[SYS_context] = "context";
1588 #endif
1589 #if defined (SYS_evsys)
1590 syscall_table[SYS_evsys] = "evsys";
1591 #endif
1592 #if defined (SYS_evtrapret)
1593 syscall_table[SYS_evtrapret] = "evtrapret";
1594 #endif
1595 #if defined (SYS_statvfs)
1596 syscall_table[SYS_statvfs] = "statvfs";
1597 #endif
1598 #if defined (SYS_fstatvfs)
1599 syscall_table[SYS_fstatvfs] = "fstatvfs";
1600 #endif
1601 #if defined (SYS_nfssys)
1602 syscall_table[SYS_nfssys] = "nfssys";
1603 #endif
1604 #if defined (SYS_waitsys)
1605 syscall_table[SYS_waitsys] = "waitsys";
1606 #endif
1607 #if defined (SYS_sigsendsys)
1608 syscall_table[SYS_sigsendsys] = "sigsendsys";
1609 #endif
1610 #if defined (SYS_hrtsys)
1611 syscall_table[SYS_hrtsys] = "hrtsys";
1612 #endif
1613 #if defined (SYS_acancel)
1614 syscall_table[SYS_acancel] = "acancel";
1615 #endif
1616 #if defined (SYS_async)
1617 syscall_table[SYS_async] = "async";
1618 #endif
1619 #if defined (SYS_priocntlsys)
1620 syscall_table[SYS_priocntlsys] = "priocntlsys";
1621 #endif
1622 #if defined (SYS_pathconf)
1623 syscall_table[SYS_pathconf] = "pathconf";
1624 #endif
1625 #if defined (SYS_mincore)
1626 syscall_table[SYS_mincore] = "mincore";
1627 #endif
1628 #if defined (SYS_mmap)
1629 syscall_table[SYS_mmap] = "mmap";
1630 #endif
1631 #if defined (SYS_mprotect)
1632 syscall_table[SYS_mprotect] = "mprotect";
1633 #endif
1634 #if defined (SYS_munmap)
1635 syscall_table[SYS_munmap] = "munmap";
1636 #endif
1637 #if defined (SYS_fpathconf)
1638 syscall_table[SYS_fpathconf] = "fpathconf";
1639 #endif
1640 #if defined (SYS_vfork)
1641 syscall_table[SYS_vfork] = "vfork";
1642 #endif
1643 #if defined (SYS_fchdir)
1644 syscall_table[SYS_fchdir] = "fchdir";
1645 #endif
1646 #if defined (SYS_readv)
1647 syscall_table[SYS_readv] = "readv";
1648 #endif
1649 #if defined (SYS_writev)
1650 syscall_table[SYS_writev] = "writev";
1651 #endif
1652 #if defined (SYS_xstat)
1653 syscall_table[SYS_xstat] = "xstat";
1654 #endif
1655 #if defined (SYS_lxstat)
1656 syscall_table[SYS_lxstat] = "lxstat";
1657 #endif
1658 #if defined (SYS_fxstat)
1659 syscall_table[SYS_fxstat] = "fxstat";
1660 #endif
1661 #if defined (SYS_xmknod)
1662 syscall_table[SYS_xmknod] = "xmknod";
1663 #endif
1664 #if defined (SYS_clocal)
1665 syscall_table[SYS_clocal] = "clocal";
1666 #endif
1667 #if defined (SYS_setrlimit)
1668 syscall_table[SYS_setrlimit] = "setrlimit";
1669 #endif
1670 #if defined (SYS_getrlimit)
1671 syscall_table[SYS_getrlimit] = "getrlimit";
1672 #endif
1673 #if defined (SYS_lchown)
1674 syscall_table[SYS_lchown] = "lchown";
1675 #endif
1676 #if defined (SYS_memcntl)
1677 syscall_table[SYS_memcntl] = "memcntl";
1678 #endif
1679 #if defined (SYS_getpmsg)
1680 syscall_table[SYS_getpmsg] = "getpmsg";
1681 #endif
1682 #if defined (SYS_putpmsg)
1683 syscall_table[SYS_putpmsg] = "putpmsg";
1684 #endif
1685 #if defined (SYS_rename)
1686 syscall_table[SYS_rename] = "rename";
1687 #endif
1688 #if defined (SYS_uname)
1689 syscall_table[SYS_uname] = "uname";
1690 #endif
1691 #if defined (SYS_setegid)
1692 syscall_table[SYS_setegid] = "setegid";
1693 #endif
1694 #if defined (SYS_sysconfig)
1695 syscall_table[SYS_sysconfig] = "sysconfig";
1696 #endif
1697 #if defined (SYS_adjtime)
1698 syscall_table[SYS_adjtime] = "adjtime";
1699 #endif
1700 #if defined (SYS_systeminfo)
1701 syscall_table[SYS_systeminfo] = "systeminfo";
1702 #endif
1703 #if defined (SYS_seteuid)
1704 syscall_table[SYS_seteuid] = "seteuid";
1705 #endif
1706 #if defined (SYS_sproc)
1707 syscall_table[SYS_sproc] = "sproc";
1708 #endif
1709 #if defined (SYS_keyctl)
1710 syscall_table[SYS_keyctl] = "keyctl";
1711 #endif
1712 #if defined (SYS_secsys)
1713 syscall_table[SYS_secsys] = "secsys";
1714 #endif
1715 #if defined (SYS_filepriv)
1716 syscall_table[SYS_filepriv] = "filepriv";
1717 #endif
1718 #if defined (SYS_procpriv)
1719 syscall_table[SYS_procpriv] = "procpriv";
1720 #endif
1721 #if defined (SYS_devstat)
1722 syscall_table[SYS_devstat] = "devstat";
1723 #endif
1724 #if defined (SYS_aclipc)
1725 syscall_table[SYS_aclipc] = "aclipc";
1726 #endif
1727 #if defined (SYS_fdevstat)
1728 syscall_table[SYS_fdevstat] = "fdevstat";
1729 #endif
1730 #if defined (SYS_flvlfile)
1731 syscall_table[SYS_flvlfile] = "flvlfile";
1732 #endif
1733 #if defined (SYS_lvlfile)
1734 syscall_table[SYS_lvlfile] = "lvlfile";
1735 #endif
1736 #if defined (SYS_lvlequal)
1737 syscall_table[SYS_lvlequal] = "lvlequal";
1738 #endif
1739 #if defined (SYS_lvlproc)
1740 syscall_table[SYS_lvlproc] = "lvlproc";
1741 #endif
1742 #if defined (SYS_lvlipc)
1743 syscall_table[SYS_lvlipc] = "lvlipc";
1744 #endif
1745 #if defined (SYS_acl)
1746 syscall_table[SYS_acl] = "acl";
1747 #endif
1748 #if defined (SYS_auditevt)
1749 syscall_table[SYS_auditevt] = "auditevt";
1750 #endif
1751 #if defined (SYS_auditctl)
1752 syscall_table[SYS_auditctl] = "auditctl";
1753 #endif
1754 #if defined (SYS_auditdmp)
1755 syscall_table[SYS_auditdmp] = "auditdmp";
1756 #endif
1757 #if defined (SYS_auditlog)
1758 syscall_table[SYS_auditlog] = "auditlog";
1759 #endif
1760 #if defined (SYS_auditbuf)
1761 syscall_table[SYS_auditbuf] = "auditbuf";
1762 #endif
1763 #if defined (SYS_lvldom)
1764 syscall_table[SYS_lvldom] = "lvldom";
1765 #endif
1766 #if defined (SYS_lvlvfs)
1767 syscall_table[SYS_lvlvfs] = "lvlvfs";
1768 #endif
1769 #if defined (SYS_mkmld)
1770 syscall_table[SYS_mkmld] = "mkmld";
1771 #endif
1772 #if defined (SYS_mldmode)
1773 syscall_table[SYS_mldmode] = "mldmode";
1774 #endif
1775 #if defined (SYS_secadvise)
1776 syscall_table[SYS_secadvise] = "secadvise";
1777 #endif
1778 #if defined (SYS_online)
1779 syscall_table[SYS_online] = "online";
1780 #endif
1781 #if defined (SYS_setitimer)
1782 syscall_table[SYS_setitimer] = "setitimer";
1783 #endif
1784 #if defined (SYS_getitimer)
1785 syscall_table[SYS_getitimer] = "getitimer";
1786 #endif
1787 #if defined (SYS_gettimeofday)
1788 syscall_table[SYS_gettimeofday] = "gettimeofday";
1789 #endif
1790 #if defined (SYS_settimeofday)
1791 syscall_table[SYS_settimeofday] = "settimeofday";
1792 #endif
1793 #if defined (SYS_lwp_create)
1794 syscall_table[SYS_lwp_create] = "_lwp_create";
1795 #endif
1796 #if defined (SYS_lwp_exit)
1797 syscall_table[SYS_lwp_exit] = "_lwp_exit";
1798 #endif
1799 #if defined (SYS_lwp_wait)
1800 syscall_table[SYS_lwp_wait] = "_lwp_wait";
1801 #endif
1802 #if defined (SYS_lwp_self)
1803 syscall_table[SYS_lwp_self] = "_lwp_self";
1804 #endif
1805 #if defined (SYS_lwp_info)
1806 syscall_table[SYS_lwp_info] = "_lwp_info";
1807 #endif
1808 #if defined (SYS_lwp_private)
1809 syscall_table[SYS_lwp_private] = "_lwp_private";
1810 #endif
1811 #if defined (SYS_processor_bind)
1812 syscall_table[SYS_processor_bind] = "processor_bind";
1813 #endif
1814 #if defined (SYS_processor_exbind)
1815 syscall_table[SYS_processor_exbind] = "processor_exbind";
1816 #endif
1817 #if defined (SYS_prepblock)
1818 syscall_table[SYS_prepblock] = "prepblock";
1819 #endif
1820 #if defined (SYS_block)
1821 syscall_table[SYS_block] = "block";
1822 #endif
1823 #if defined (SYS_rdblock)
1824 syscall_table[SYS_rdblock] = "rdblock";
1825 #endif
1826 #if defined (SYS_unblock)
1827 syscall_table[SYS_unblock] = "unblock";
1828 #endif
1829 #if defined (SYS_cancelblock)
1830 syscall_table[SYS_cancelblock] = "cancelblock";
1831 #endif
1832 #if defined (SYS_pread)
1833 syscall_table[SYS_pread] = "pread";
1834 #endif
1835 #if defined (SYS_pwrite)
1836 syscall_table[SYS_pwrite] = "pwrite";
1837 #endif
1838 #if defined (SYS_truncate)
1839 syscall_table[SYS_truncate] = "truncate";
1840 #endif
1841 #if defined (SYS_ftruncate)
1842 syscall_table[SYS_ftruncate] = "ftruncate";
1843 #endif
1844 #if defined (SYS_lwp_kill)
1845 syscall_table[SYS_lwp_kill] = "_lwp_kill";
1846 #endif
1847 #if defined (SYS_sigwait)
1848 syscall_table[SYS_sigwait] = "sigwait";
1849 #endif
1850 #if defined (SYS_fork1)
1851 syscall_table[SYS_fork1] = "fork1";
1852 #endif
1853 #if defined (SYS_forkall)
1854 syscall_table[SYS_forkall] = "forkall";
1855 #endif
1856 #if defined (SYS_modload)
1857 syscall_table[SYS_modload] = "modload";
1858 #endif
1859 #if defined (SYS_moduload)
1860 syscall_table[SYS_moduload] = "moduload";
1861 #endif
1862 #if defined (SYS_modpath)
1863 syscall_table[SYS_modpath] = "modpath";
1864 #endif
1865 #if defined (SYS_modstat)
1866 syscall_table[SYS_modstat] = "modstat";
1867 #endif
1868 #if defined (SYS_modadm)
1869 syscall_table[SYS_modadm] = "modadm";
1870 #endif
1871 #if defined (SYS_getksym)
1872 syscall_table[SYS_getksym] = "getksym";
1873 #endif
1874 #if defined (SYS_lwp_suspend)
1875 syscall_table[SYS_lwp_suspend] = "_lwp_suspend";
1876 #endif
1877 #if defined (SYS_lwp_continue)
1878 syscall_table[SYS_lwp_continue] = "_lwp_continue";
1879 #endif
1880 #if defined (SYS_priocntllst)
1881 syscall_table[SYS_priocntllst] = "priocntllst";
1882 #endif
1883 #if defined (SYS_sleep)
1884 syscall_table[SYS_sleep] = "sleep";
1885 #endif
1886 #if defined (SYS_lwp_sema_wait)
1887 syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait";
1888 #endif
1889 #if defined (SYS_lwp_sema_post)
1890 syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post";
1891 #endif
1892 #if defined (SYS_lwp_sema_trywait)
1893 syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait";
1894 #endif
1895 #if defined(SYS_fstatvfs64)
1896 syscall_table[SYS_fstatvfs64] = "fstatvfs64";
1897 #endif
1898 #if defined(SYS_statvfs64)
1899 syscall_table[SYS_statvfs64] = "statvfs64";
1900 #endif
1901 #if defined(SYS_ftruncate64)
1902 syscall_table[SYS_ftruncate64] = "ftruncate64";
1903 #endif
1904 #if defined(SYS_truncate64)
1905 syscall_table[SYS_truncate64] = "truncate64";
1906 #endif
1907 #if defined(SYS_getrlimit64)
1908 syscall_table[SYS_getrlimit64] = "getrlimit64";
1909 #endif
1910 #if defined(SYS_setrlimit64)
1911 syscall_table[SYS_setrlimit64] = "setrlimit64";
1912 #endif
1913 #if defined(SYS_lseek64)
1914 syscall_table[SYS_lseek64] = "lseek64";
1915 #endif
1916 #if defined(SYS_mmap64)
1917 syscall_table[SYS_mmap64] = "mmap64";
1918 #endif
1919 #if defined(SYS_pread64)
1920 syscall_table[SYS_pread64] = "pread64";
1921 #endif
1922 #if defined(SYS_creat64)
1923 syscall_table[SYS_creat64] = "creat64";
1924 #endif
1925 #if defined(SYS_dshmsys)
1926 syscall_table[SYS_dshmsys] = "dshmsys";
1927 #endif
1928 #if defined(SYS_invlpg)
1929 syscall_table[SYS_invlpg] = "invlpg";
1930 #endif
1931 #if defined(SYS_cg_ids)
1932 syscall_table[SYS_cg_ids] = "cg_ids";
1933 #endif
1934 #if defined(SYS_cg_processors)
1935 syscall_table[SYS_cg_processors] = "cg_processors";
1936 #endif
1937 #if defined(SYS_cg_info)
1938 syscall_table[SYS_cg_info] = "cg_info";
1939 #endif
1940 #if defined(SYS_cg_bind)
1941 syscall_table[SYS_cg_bind] = "cg_bind";
1942 #endif
1943 #if defined(SYS_cg_current)
1944 syscall_table[SYS_cg_current] = "cg_current";
1945 #endif
1946 #if defined(SYS_cg_memloc)
1947 syscall_table[SYS_cg_memloc] = "cg_memloc";
1948 #endif
1949 }
1950
1951 /*
1952
1953 LOCAL FUNCTION
1954
1955 procfs_kill_inferior - kill any current inferior
1956
1957 SYNOPSIS
1958
1959 void procfs_kill_inferior (void)
1960
1961 DESCRIPTION
1962
1963 Kill any current inferior.
1964
1965 NOTES
1966
1967 Kills even attached inferiors. Presumably the user has already
1968 been prompted that the inferior is an attached one rather than
1969 one started by gdb. (FIXME?)
1970
1971 */
1972
1973 static void
1974 procfs_kill_inferior ()
1975 {
1976 target_mourn_inferior ();
1977 }
1978
1979 /*
1980
1981 LOCAL FUNCTION
1982
1983 unconditionally_kill_inferior - terminate the inferior
1984
1985 SYNOPSIS
1986
1987 static void unconditionally_kill_inferior (struct procinfo *)
1988
1989 DESCRIPTION
1990
1991 Kill the specified inferior.
1992
1993 NOTE
1994
1995 A possibly useful enhancement would be to first try sending
1996 the inferior a terminate signal, politely asking it to commit
1997 suicide, before we murder it (we could call that
1998 politely_kill_inferior()).
1999
2000 */
2001
2002 static void
2003 unconditionally_kill_inferior (pi)
2004 struct procinfo *pi;
2005 {
2006 int ppid;
2007 struct proc_ctl pctl;
2008
2009 ppid = pi->prstatus.pr_ppid;
2010
2011 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
2012 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
2013 before the PIOCKILL, otherwise it might generate a corrupted core
2014 file for the inferior. */
2015 ioctl (pi->ctl_fd, PIOCSSIG, NULL);
2016 #endif
2017 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
2018 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
2019 to kill the inferior, otherwise it might remain stopped with a
2020 pending SIGKILL.
2021 We do not check the result of the PIOCSSIG, the inferior might have
2022 died already. */
2023 {
2024 struct siginfo newsiginfo;
2025
2026 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2027 newsiginfo.si_signo = SIGKILL;
2028 newsiginfo.si_code = 0;
2029 newsiginfo.si_errno = 0;
2030 newsiginfo.si_pid = getpid ();
2031 newsiginfo.si_uid = getuid ();
2032 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
2033 }
2034 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
2035 procfs_write_pckill (pi);
2036 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
2037
2038 close_proc_file (pi);
2039
2040 /* Only wait() for our direct children. Our grandchildren zombies are killed
2041 by the death of their parents. */
2042
2043 if (ppid == getpid ())
2044 wait ((int *) 0);
2045 }
2046
2047 /*
2048
2049 LOCAL FUNCTION
2050
2051 procfs_xfer_memory -- copy data to or from inferior memory space
2052
2053 SYNOPSIS
2054
2055 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
2056 int dowrite, struct target_ops target)
2057
2058 DESCRIPTION
2059
2060 Copy LEN bytes to/from inferior's memory starting at MEMADDR
2061 from/to debugger memory starting at MYADDR. Copy from inferior
2062 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
2063
2064 Returns the length copied, which is either the LEN argument or
2065 zero. This xfer function does not do partial moves, since procfs_ops
2066 doesn't allow memory operations to cross below us in the target stack
2067 anyway.
2068
2069 NOTES
2070
2071 The /proc interface makes this an almost trivial task.
2072 */
2073
2074 static int
2075 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
2076 CORE_ADDR memaddr;
2077 char *myaddr;
2078 int len;
2079 int dowrite;
2080 struct target_ops *target; /* ignored */
2081 {
2082 int nbytes = 0;
2083 struct procinfo *pi;
2084
2085 pi = current_procinfo;
2086
2087 if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
2088 {
2089 if (dowrite)
2090 {
2091 nbytes = write (pi->as_fd, myaddr, len);
2092 }
2093 else
2094 {
2095 nbytes = read (pi->as_fd, myaddr, len);
2096 }
2097 if (nbytes < 0)
2098 {
2099 nbytes = 0;
2100 }
2101 }
2102 return (nbytes);
2103 }
2104
2105 /*
2106
2107 LOCAL FUNCTION
2108
2109 procfs_store_registers -- copy register values back to inferior
2110
2111 SYNOPSIS
2112
2113 void procfs_store_registers (int regno)
2114
2115 DESCRIPTION
2116
2117 Store our current register values back into the inferior. If
2118 REGNO is -1 then store all the register, otherwise store just
2119 the value specified by REGNO.
2120
2121 NOTES
2122
2123 If we are storing only a single register, we first have to get all
2124 the current values from the process, overwrite the desired register
2125 in the gregset with the one we want from gdb's registers, and then
2126 send the whole set back to the process. For writing all the
2127 registers, all we have to do is generate the gregset and send it to
2128 the process.
2129
2130 Also note that the process has to be stopped on an event of interest
2131 for this to work, which basically means that it has to have been
2132 run under the control of one of the other /proc ioctl calls and not
2133 ptrace. Since we don't use ptrace anyway, we don't worry about this
2134 fine point, but it is worth noting for future reference.
2135
2136 Gdb is confused about what this function is supposed to return.
2137 Some versions return a value, others return nothing. Some are
2138 declared to return a value and actually return nothing. Gdb ignores
2139 anything returned. (FIXME)
2140
2141 */
2142
2143 static void
2144 procfs_store_registers (regno)
2145 int regno;
2146 {
2147 struct procinfo *pi;
2148 #ifdef PROCFS_USE_READ_WRITE
2149 struct greg_ctl greg;
2150 struct fpreg_ctl fpreg;
2151 #endif
2152
2153 pi = current_procinfo;
2154
2155 #ifdef PROCFS_USE_READ_WRITE
2156 if (regno != -1)
2157 {
2158 procfs_read_status (pi);
2159 memcpy ((char *) &greg.gregset,
2160 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs,
2161 sizeof (gdb_gregset_t));
2162 }
2163 fill_gregset (&greg.gregset, regno);
2164 greg.cmd = PCSREG;
2165 write (pi->ctl_fd, &greg, sizeof (greg));
2166 #else /* PROCFS_USE_READ_WRITE */
2167 if (regno != -1)
2168 {
2169 ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset);
2170 }
2171 fill_gregset (&pi->gregset.gregset, regno);
2172 ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset);
2173 #endif /* PROCFS_USE_READ_WRITE */
2174
2175 #if defined (FP0_REGNUM)
2176
2177 /* Now repeat everything using the floating point register set, if the
2178 target has floating point hardware. Since we ignore the returned value,
2179 we'll never know whether it worked or not anyway. */
2180
2181 #ifdef PROCFS_USE_READ_WRITE
2182 if (regno != -1)
2183 {
2184 procfs_read_status (pi);
2185 memcpy ((char *) &fpreg.fpregset,
2186 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs,
2187 sizeof (gdb_fpregset_t));
2188 }
2189 fill_fpregset (&fpreg.fpregset, regno);
2190 fpreg.cmd = PCSFPREG;
2191 write (pi->ctl_fd, &fpreg, sizeof (fpreg));
2192 #else /* PROCFS_USE_READ_WRITE */
2193 if (regno != -1)
2194 {
2195 ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset);
2196 }
2197 fill_fpregset (&pi->fpregset.fpregset, regno);
2198 ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset);
2199 #endif /* PROCFS_USE_READ_WRITE */
2200
2201 #endif /* FP0_REGNUM */
2202
2203 }
2204
2205 /*
2206
2207 LOCAL FUNCTION
2208
2209 init_procinfo - setup a procinfo struct and connect it to a process
2210
2211 SYNOPSIS
2212
2213 struct procinfo * init_procinfo (int pid)
2214
2215 DESCRIPTION
2216
2217 Allocate a procinfo structure, open the /proc file and then set up the
2218 set of signals and faults that are to be traced. Returns a pointer to
2219 the new procinfo structure.
2220
2221 NOTES
2222
2223 If proc_init_failed ever gets called, control returns to the command
2224 processing loop via the standard error handling code.
2225
2226 */
2227
2228 static struct procinfo *
2229 init_procinfo (pid, kill)
2230 int pid;
2231 int kill;
2232 {
2233 struct procinfo *pi = (struct procinfo *)
2234 xmalloc (sizeof (struct procinfo));
2235 struct sig_ctl sctl;
2236 struct flt_ctl fctl;
2237
2238 memset ((char *) pi, 0, sizeof (*pi));
2239 if (!open_proc_file (pid, pi, O_RDWR, 1))
2240 proc_init_failed (pi, "can't open process file", kill);
2241
2242 /* open_proc_file may modify pid. */
2243
2244 pid = pi->pid;
2245
2246 /* Add new process to process info list */
2247
2248 pi->next = procinfo_list;
2249 procinfo_list = pi;
2250
2251 add_fd (pi); /* Add to list for poll/select */
2252
2253 /* Remember some things about the inferior that we will, or might, change
2254 so that we can restore them when we detach. */
2255 #ifdef UNIXWARE
2256 memcpy ((char *) &pi->saved_trace.sigset,
2257 (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
2258 memcpy ((char *) &pi->saved_fltset.fltset,
2259 (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
2260 memcpy ((char *) &pi->saved_entryset.sysset,
2261 (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
2262 memcpy ((char *) &pi->saved_exitset.sysset,
2263 (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
2264
2265 /* Set up trace and fault sets, as gdb expects them. */
2266
2267 prfillset (&sctl.sigset);
2268 notice_signals (pi, &sctl);
2269 prfillset (&fctl.fltset);
2270 prdelset (&fctl.fltset, FLTPAGE);
2271
2272 #else /* ! UNIXWARE */
2273 ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
2274 ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
2275 ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
2276 ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
2277 ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
2278
2279 /* Set up trace and fault sets, as gdb expects them. */
2280
2281 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
2282 prfillset (&pi->prrun.pr_trace);
2283 procfs_notice_signals (pid);
2284 prfillset (&pi->prrun.pr_fault);
2285 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2286 #ifdef PROCFS_DONT_TRACE_FAULTS
2287 premptyset (&pi->prrun.pr_fault);
2288 #endif
2289 #endif /* UNIXWARE */
2290
2291 if (!procfs_read_status (pi))
2292 proc_init_failed (pi, "procfs_read_status failed", kill);
2293
2294 return pi;
2295 }
2296
2297 /*
2298
2299 LOCAL FUNCTION
2300
2301 create_procinfo - initialize access to a /proc entry
2302
2303 SYNOPSIS
2304
2305 struct procinfo * create_procinfo (int pid)
2306
2307 DESCRIPTION
2308
2309 Allocate a procinfo structure, open the /proc file and then set up the
2310 set of signals and faults that are to be traced. Returns a pointer to
2311 the new procinfo structure.
2312
2313 NOTES
2314
2315 If proc_init_failed ever gets called, control returns to the command
2316 processing loop via the standard error handling code.
2317
2318 */
2319
2320 static struct procinfo *
2321 create_procinfo (pid)
2322 int pid;
2323 {
2324 struct procinfo *pi;
2325 struct sig_ctl sctl;
2326 struct flt_ctl fctl;
2327
2328 pi = find_procinfo (pid, 1);
2329 if (pi != NULL)
2330 return pi; /* All done! It already exists */
2331
2332 pi = init_procinfo (pid, 1);
2333
2334 #ifndef UNIXWARE
2335 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2336 already stopped, even if they all have PR_ASYNC set. */
2337 if (!(pi->prstatus.pr_flags & PR_STOPPED))
2338 #endif
2339 if (!procfs_write_pcwstop (pi))
2340 proc_init_failed (pi, "procfs_write_pcwstop failed", 1);
2341
2342 #ifdef PROCFS_USE_READ_WRITE
2343 fctl.cmd = PCSFAULT;
2344 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
2345 proc_init_failed (pi, "PCSFAULT failed", 1);
2346 #else
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 struct proc_ctl pctl;
2386
2387 #ifdef UNIXWARE
2388 pctl.cmd = PCRUN;
2389 pctl.data = PRCFAULT;
2390 #else
2391 pi->prrun.pr_flags = PRCFAULT;
2392 #endif
2393
2394 #ifdef PROCFS_USE_READ_WRITE
2395 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
2396 #else
2397 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2398 #endif
2399 perror_with_name (pi->pathname);
2400
2401 if (attach_flag)
2402 {
2403 /* Claim it exited (don't call wait). */
2404 if (info_verbose)
2405 printf_filtered ("(attached process has exited)\n");
2406 *statvalp = 0;
2407 *rtnvalp = inferior_pid;
2408 }
2409 else
2410 {
2411 *rtnvalp = wait (statvalp);
2412 if (*rtnvalp >= 0)
2413 *rtnvalp = pi->pid;
2414 }
2415
2416 /* Close ALL open proc file handles,
2417 except the one that called SYS_exit. */
2418 for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi)
2419 {
2420 next_pi = temp_pi->next;
2421 if (temp_pi == pi)
2422 continue; /* Handled below */
2423 close_proc_file (temp_pi);
2424 }
2425 return 1;
2426 }
2427
2428 /*
2429
2430 LOCAL FUNCTION
2431
2432 procfs_exec_handler - handle exit from the exec family of syscalls
2433
2434 SYNOPSIS
2435
2436 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2437
2438 DESCRIPTION
2439
2440 This routine is called when an inferior process is about to finish any
2441 of the exec() family of system calls. It pretends that we got a
2442 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2443 to tell procfs_wait to wake up.
2444
2445 NOTES
2446 This need for compatibility with ptrace is questionable. In the
2447 future, it shouldn't be necessary.
2448
2449 */
2450
2451 static int
2452 procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2453 struct procinfo *pi;
2454 int syscall_num;
2455 int why;
2456 int *rtnvalp;
2457 int *statvalp;
2458 {
2459 *statvalp = (SIGTRAP << 8) | 0177;
2460
2461 return 1;
2462 }
2463
2464 #if defined(SYS_sproc) && !defined(UNIXWARE)
2465 /* IRIX lwp creation system call */
2466
2467 /*
2468
2469 LOCAL FUNCTION
2470
2471 procfs_sproc_handler - handle exit from the sproc syscall
2472
2473 SYNOPSIS
2474
2475 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2476
2477 DESCRIPTION
2478
2479 This routine is called when an inferior process is about to finish an
2480 sproc() system call. This is the system call that IRIX uses to create
2481 a lightweight process. When the target process gets this event, we can
2482 look at rval1 to find the new child processes ID, and create a new
2483 procinfo struct from that.
2484
2485 After that, it pretends that we got a SIGTRAP, and returns non-zero
2486 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2487 woken up, sees the new process and continues it.
2488
2489 NOTES
2490 We actually never see the child exiting from sproc because we will
2491 shortly stop the child with PIOCSTOP, which is then registered as the
2492 event of interest.
2493 */
2494
2495 static int
2496 procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2497 struct procinfo *pi;
2498 int syscall_num;
2499 int why;
2500 int *rtnvalp;
2501 int *statvalp;
2502 {
2503 /* We've just detected the completion of an sproc system call. Now we need to
2504 setup a procinfo struct for this thread, and notify the thread system of the
2505 new arrival. */
2506
2507 /* If sproc failed, then nothing interesting happened. Continue the process
2508 and go back to sleep. */
2509
2510 if (pi->prstatus.pr_errno != 0)
2511 {
2512 pi->prrun.pr_flags &= PRSTEP;
2513 pi->prrun.pr_flags |= PRCFAULT;
2514
2515 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2516 perror_with_name (pi->pathname);
2517
2518 return 0;
2519 }
2520
2521 /* At this point, the new thread is stopped at it's first instruction, and
2522 the parent is stopped at the exit from sproc. */
2523
2524 /* Notify the caller of the arrival of a new thread. */
2525 create_procinfo (pi->prstatus.pr_rval1);
2526
2527 *rtnvalp = pi->prstatus.pr_rval1;
2528 *statvalp = (SIGTRAP << 8) | 0177;
2529
2530 return 1;
2531 }
2532
2533 /*
2534
2535 LOCAL FUNCTION
2536
2537 procfs_fork_handler - handle exit from the fork syscall
2538
2539 SYNOPSIS
2540
2541 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2542
2543 DESCRIPTION
2544
2545 This routine is called when an inferior process is about to finish a
2546 fork() system call. We will open up the new process, and then close
2547 it, which releases it from the clutches of the debugger.
2548
2549 After that, we continue the target process as though nothing had
2550 happened.
2551
2552 NOTES
2553 This is necessary for IRIX because we have to set PR_FORK in order
2554 to catch the creation of lwps (via sproc()). When an actual fork
2555 occurs, it becomes necessary to reset the forks debugger flags and
2556 continue it because we can't hack multiple processes yet.
2557 */
2558
2559 static int
2560 procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2561 struct procinfo *pi;
2562 int syscall_num;
2563 int why;
2564 int *rtnvalp;
2565 int *statvalp;
2566 {
2567 struct procinfo *pitemp;
2568
2569 /* At this point, we've detected the completion of a fork (or vfork) call in
2570 our child. The grandchild is also stopped because we set inherit-on-fork
2571 earlier. (Note that nobody has the grandchilds' /proc file open at this
2572 point.) We will release the grandchild from the debugger by opening it's
2573 /proc file and then closing it. Since run-on-last-close is set, the
2574 grandchild continues on its' merry way. */
2575
2576
2577 pitemp = create_procinfo (pi->prstatus.pr_rval1);
2578 if (pitemp)
2579 close_proc_file (pitemp);
2580
2581 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2582 perror_with_name (pi->pathname);
2583
2584 return 0;
2585 }
2586 #endif /* SYS_sproc && !UNIXWARE */
2587
2588 /*
2589
2590 LOCAL FUNCTION
2591
2592 procfs_set_inferior_syscall_traps - setup the syscall traps
2593
2594 SYNOPSIS
2595
2596 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2597
2598 DESCRIPTION
2599
2600 Called for each "procinfo" (process, thread, or LWP) in the
2601 inferior, to register for notification of and handlers for
2602 syscall traps in the inferior.
2603
2604 */
2605
2606 static void
2607 procfs_set_inferior_syscall_traps (pip)
2608 struct procinfo *pip;
2609 {
2610 procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
2611 procfs_exit_handler);
2612
2613 #ifndef PRFS_STOPEXEC
2614 #ifdef SYS_exec
2615 procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
2616 procfs_exec_handler);
2617 #endif
2618 #ifdef SYS_execv
2619 procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT,
2620 procfs_exec_handler);
2621 #endif
2622 #ifdef SYS_execve
2623 procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
2624 procfs_exec_handler);
2625 #endif
2626 #endif /* PRFS_STOPEXEC */
2627
2628 /* Setup traps on exit from sproc() */
2629
2630 #ifdef SYS_sproc
2631 procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT,
2632 procfs_sproc_handler);
2633 procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT,
2634 procfs_fork_handler);
2635 #ifdef SYS_vfork
2636 procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT,
2637 procfs_fork_handler);
2638 #endif
2639 /* Turn on inherit-on-fork flag so that all children of the target process
2640 start with tracing flags set. This allows us to trap lwp creation. Note
2641 that we also have to trap on fork and vfork in order to disable all tracing
2642 in the targets child processes. */
2643
2644 modify_inherit_on_fork_flag (pip->ctl_fd, 1);
2645 #endif
2646
2647 #ifdef SYS_lwp_create
2648 procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
2649 procfs_lwp_creation_handler);
2650 #endif
2651 }
2652
2653 /*
2654
2655 LOCAL FUNCTION
2656
2657 procfs_init_inferior - initialize target vector and access to a
2658 /proc entry
2659
2660 SYNOPSIS
2661
2662 void procfs_init_inferior (int pid)
2663
2664 DESCRIPTION
2665
2666 When gdb starts an inferior, this function is called in the parent
2667 process immediately after the fork. It waits for the child to stop
2668 on the return from the exec system call (the child itself takes care
2669 of ensuring that this is set up), then sets up the set of signals
2670 and faults that are to be traced. Returns the pid, which may have had
2671 the thread-id added to it.
2672
2673 NOTES
2674
2675 If proc_init_failed ever gets called, control returns to the command
2676 processing loop via the standard error handling code.
2677
2678 */
2679
2680 static void
2681 procfs_init_inferior (pid)
2682 int pid;
2683 {
2684 struct procinfo *pip;
2685
2686 push_target (&procfs_ops);
2687
2688 pip = create_procinfo (pid);
2689
2690 procfs_set_inferior_syscall_traps (pip);
2691
2692 /* create_procinfo may change the pid, so we have to update inferior_pid
2693 here before calling other gdb routines that need the right pid. */
2694
2695 pid = pip->pid;
2696 inferior_pid = pid;
2697
2698 add_thread (pip->pid); /* Setup initial thread */
2699
2700 #ifdef START_INFERIOR_TRAPS_EXPECTED
2701 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
2702 #else
2703 /* One trap to exec the shell, one to exec the program being debugged. */
2704 startup_inferior (2);
2705 #endif
2706 }
2707
2708 /*
2709
2710 GLOBAL FUNCTION
2711
2712 procfs_notice_signals
2713
2714 SYNOPSIS
2715
2716 static void procfs_notice_signals (int pid);
2717
2718 DESCRIPTION
2719
2720 When the user changes the state of gdb's signal handling via the
2721 "handle" command, this function gets called to see if any change
2722 in the /proc interface is required. It is also called internally
2723 by other /proc interface functions to initialize the state of
2724 the traced signal set.
2725
2726 One thing it does is that signals for which the state is "nostop",
2727 "noprint", and "pass", have their trace bits reset in the pr_trace
2728 field, so that they are no longer traced. This allows them to be
2729 delivered directly to the inferior without the debugger ever being
2730 involved.
2731 */
2732
2733 static void
2734 procfs_notice_signals (pid)
2735 int pid;
2736 {
2737 struct procinfo *pi;
2738 struct sig_ctl sctl;
2739
2740 pi = find_procinfo (pid, 0);
2741
2742 #ifndef HAVE_PRRUN_T
2743 premptyset (&sctl.sigset);
2744 #else
2745 sctl.sigset = pi->prrun.pr_trace;
2746 #endif
2747
2748 notice_signals (pi, &sctl);
2749
2750 #ifdef HAVE_PRRUN_T
2751 pi->prrun.pr_trace = sctl.sigset;
2752 #endif
2753 }
2754
2755 static void
2756 notice_signals (pi, sctl)
2757 struct procinfo *pi;
2758 struct sig_ctl *sctl;
2759 {
2760 int signo;
2761
2762 for (signo = 0; signo < NSIG; signo++)
2763 {
2764 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
2765 signal_print_state (target_signal_from_host (signo)) == 0 &&
2766 signal_pass_state (target_signal_from_host (signo)) == 1)
2767 {
2768 prdelset (&sctl->sigset, signo);
2769 }
2770 else
2771 {
2772 praddset (&sctl->sigset, signo);
2773 }
2774 }
2775 #ifdef PROCFS_USE_READ_WRITE
2776 sctl->cmd = PCSTRACE;
2777 if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0)
2778 #else
2779 if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset))
2780 #endif
2781 {
2782 print_sys_errmsg ("PIOCSTRACE failed", errno);
2783 }
2784 }
2785
2786 /*
2787
2788 LOCAL FUNCTION
2789
2790 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2791
2792 SYNOPSIS
2793
2794 void proc_set_exec_trap (void)
2795
2796 DESCRIPTION
2797
2798 This function is called in the child process when starting up
2799 an inferior, prior to doing the exec of the actual inferior.
2800 It sets the child process's exitset to make exit from the exec
2801 system call an event of interest to stop on, and then simply
2802 returns. The child does the exec, the system call returns, and
2803 the child stops at the first instruction, ready for the gdb
2804 parent process to take control of it.
2805
2806 NOTE
2807
2808 We need to use all local variables since the child may be sharing
2809 it's data space with the parent, if vfork was used rather than
2810 fork.
2811
2812 Also note that we want to turn off the inherit-on-fork flag in
2813 the child process so that any grand-children start with all
2814 tracing flags cleared.
2815 */
2816
2817 static void
2818 proc_set_exec_trap ()
2819 {
2820 struct sys_ctl exitset;
2821 struct sys_ctl entryset;
2822 char procname[MAX_PROC_NAME_SIZE];
2823 int fd;
2824
2825 sprintf (procname, CTL_PROC_NAME_FMT, getpid ());
2826 #ifdef UNIXWARE
2827 if ((fd = open (procname, O_WRONLY)) < 0)
2828 #else
2829 if ((fd = open (procname, O_RDWR)) < 0)
2830 #endif
2831 {
2832 perror (procname);
2833 gdb_flush (gdb_stderr);
2834 _exit (127);
2835 }
2836 premptyset (&exitset.sysset);
2837 premptyset (&entryset.sysset);
2838
2839 #ifdef PRFS_STOPEXEC
2840 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2841 exits from exec system calls because of the user level loader. */
2842 {
2843 int prfs_flags;
2844
2845 if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
2846 {
2847 perror (procname);
2848 gdb_flush (gdb_stderr);
2849 _exit (127);
2850 }
2851 prfs_flags |= PRFS_STOPEXEC;
2852 if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
2853 {
2854 perror (procname);
2855 gdb_flush (gdb_stderr);
2856 _exit (127);
2857 }
2858 }
2859 #else /* PRFS_STOPEXEC */
2860 /* GW: Rationale...
2861 Not all systems with /proc have all the exec* syscalls with the same
2862 names. On the SGI, for example, there is no SYS_exec, but there
2863 *is* a SYS_execv. So, we try to account for that. */
2864
2865 #ifdef SYS_exec
2866 praddset (&exitset.sysset, SYS_exec);
2867 #endif
2868 #ifdef SYS_execve
2869 praddset (&exitset.sysset, SYS_execve);
2870 #endif
2871 #ifdef SYS_execv
2872 praddset (&exitset.sysset, SYS_execv);
2873 #endif
2874
2875 #ifdef PROCFS_USE_READ_WRITE
2876 exitset.cmd = PCSEXIT;
2877 if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0)
2878 #else
2879 if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0)
2880 #endif
2881 {
2882 perror (procname);
2883 gdb_flush (gdb_stderr);
2884 _exit (127);
2885 }
2886 #endif /* PRFS_STOPEXEC */
2887
2888 praddset (&entryset.sysset, SYS_exit);
2889
2890 #ifdef PROCFS_USE_READ_WRITE
2891 entryset.cmd = PCSENTRY;
2892 if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0)
2893 #else
2894 if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0)
2895 #endif
2896 {
2897 perror (procname);
2898 gdb_flush (gdb_stderr);
2899 _exit (126);
2900 }
2901
2902 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2903 start with tracing flags cleared. */
2904
2905 modify_inherit_on_fork_flag (fd, 0);
2906
2907 /* Turn on run-on-last-close flag so that this process will not hang
2908 if GDB goes away for some reason. */
2909
2910 modify_run_on_last_close_flag (fd, 1);
2911
2912 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2913 /* NOTE: revisit when doing thread support for UW */
2914 #ifdef PR_ASYNC
2915 {
2916 long pr_flags;
2917 struct proc_ctl pctl;
2918
2919 /* Solaris needs this to make procfs treat all threads seperately. Without
2920 this, all threads halt whenever something happens to any thread. Since
2921 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2922
2923 pr_flags = PR_ASYNC;
2924 #ifdef PROCFS_USE_READ_WRITE
2925 pctl.cmd = PCSET;
2926 pctl.data = PR_FORK | PR_ASYNC;
2927 write (fd, (char *) &pctl, sizeof (struct proc_ctl));
2928 #else
2929 ioctl (fd, PIOCSET, &pr_flags);
2930 #endif
2931 }
2932 #endif /* PR_ASYNC */
2933 #endif /* !UNIXWARE */
2934 }
2935
2936 /*
2937
2938 GLOBAL FUNCTION
2939
2940 proc_iterate_over_mappings -- call function for every mapped space
2941
2942 SYNOPSIS
2943
2944 int proc_iterate_over_mappings (int (*func)())
2945
2946 DESCRIPTION
2947
2948 Given a pointer to a function, call that function for every
2949 mapped address space, passing it an open file descriptor for
2950 the file corresponding to that mapped address space (if any)
2951 and the base address of the mapped space. Quit when we hit
2952 the end of the mappings or the function returns nonzero.
2953 */
2954
2955 #ifdef UNIXWARE
2956 int
2957 proc_iterate_over_mappings (func)
2958 int (*func) PARAMS ((int, CORE_ADDR));
2959 {
2960 int nmap;
2961 int fd;
2962 int funcstat = 0;
2963 prmap_t *prmaps;
2964 prmap_t *prmap;
2965 struct procinfo *pi;
2966 struct stat sbuf;
2967
2968 pi = current_procinfo;
2969
2970 if (fstat (pi->map_fd, &sbuf) < 0)
2971 return 0;
2972
2973 nmap = sbuf.st_size / sizeof (prmap_t);
2974 prmaps = (prmap_t *) alloca (nmap * sizeof (prmap_t));
2975 if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) &&
2976 (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) ==
2977 (nmap * sizeof (prmap_t))))
2978 {
2979 int i = 0;
2980 for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i)
2981 {
2982 char name[sizeof ("/proc/1234567890/object") +
2983 sizeof (prmap->pr_mapname)];
2984 sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname);
2985 if ((fd = open (name, O_RDONLY)) == -1)
2986 {
2987 funcstat = 1;
2988 break;
2989 }
2990 funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
2991 close (fd);
2992 }
2993 }
2994 return (funcstat);
2995 }
2996 #else /* UNIXWARE */
2997 int
2998 proc_iterate_over_mappings (func)
2999 int (*func) PARAMS ((int, CORE_ADDR));
3000 {
3001 int nmap;
3002 int fd;
3003 int funcstat = 0;
3004 struct prmap *prmaps;
3005 struct prmap *prmap;
3006 struct procinfo *pi;
3007
3008 pi = current_procinfo;
3009
3010 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
3011 {
3012 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3013 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
3014 {
3015 for (prmap = prmaps; prmap->pr_size && funcstat == 0; ++prmap)
3016 {
3017 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap->pr_vaddr, 0);
3018 funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
3019 close (fd);
3020 }
3021 }
3022 }
3023 return (funcstat);
3024 }
3025 #endif /* UNIXWARE */
3026
3027 #if 0 /* Currently unused */
3028 /*
3029
3030 GLOBAL FUNCTION
3031
3032 proc_base_address -- find base address for segment containing address
3033
3034 SYNOPSIS
3035
3036 CORE_ADDR proc_base_address (CORE_ADDR addr)
3037
3038 DESCRIPTION
3039
3040 Given an address of a location in the inferior, find and return
3041 the base address of the mapped segment containing that address.
3042
3043 This is used for example, by the shared library support code,
3044 where we have the pc value for some location in the shared library
3045 where we are stopped, and need to know the base address of the
3046 segment containing that address.
3047 */
3048
3049 CORE_ADDR
3050 proc_base_address (addr)
3051 CORE_ADDR addr;
3052 {
3053 int nmap;
3054 struct prmap *prmaps;
3055 struct prmap *prmap;
3056 CORE_ADDR baseaddr = 0;
3057 struct procinfo *pi;
3058
3059 pi = current_procinfo;
3060
3061 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
3062 {
3063 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3064 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
3065 {
3066 for (prmap = prmaps; prmap->pr_size; ++prmap)
3067 {
3068 if ((prmap->pr_vaddr <= (caddr_t) addr) &&
3069 (prmap->pr_vaddr + prmap->pr_size > (caddr_t) addr))
3070 {
3071 baseaddr = (CORE_ADDR) prmap->pr_vaddr;
3072 break;
3073 }
3074 }
3075 }
3076 }
3077 return (baseaddr);
3078 }
3079
3080 #endif /* 0 */
3081
3082 #ifndef UNIXWARE
3083 /*
3084
3085 LOCAL FUNCTION
3086
3087 proc_address_to_fd -- return open fd for file mapped to address
3088
3089 SYNOPSIS
3090
3091 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
3092
3093 DESCRIPTION
3094
3095 Given an address in the current inferior's address space, use the
3096 /proc interface to find an open file descriptor for the file that
3097 this address was mapped in from. Return -1 if there is no current
3098 inferior. Print a warning message if there is an inferior but
3099 the address corresponds to no file (IE a bogus address).
3100
3101 */
3102
3103 static int
3104 proc_address_to_fd (pi, addr, complain)
3105 struct procinfo *pi;
3106 CORE_ADDR addr;
3107 int complain;
3108 {
3109 int fd = -1;
3110
3111 if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) & addr)) < 0)
3112 {
3113 if (complain)
3114 {
3115 print_sys_errmsg (pi->pathname, errno);
3116 warning ("can't find mapped file for address 0x%x", addr);
3117 }
3118 }
3119 return (fd);
3120 }
3121 #endif /* !UNIXWARE */
3122
3123 /* Attach to process PID, then initialize for debugging it
3124 and wait for the trace-trap that results from attaching. */
3125
3126 static void
3127 procfs_attach (args, from_tty)
3128 char *args;
3129 int from_tty;
3130 {
3131 char *exec_file;
3132 int pid;
3133
3134 if (!args)
3135 error_no_arg ("process-id to attach");
3136
3137 pid = atoi (args);
3138
3139 if (pid == getpid ()) /* Trying to masturbate? */
3140 error ("I refuse to debug myself!");
3141
3142 if (from_tty)
3143 {
3144 exec_file = (char *) get_exec_file (0);
3145
3146 if (exec_file)
3147 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
3148 else
3149 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
3150
3151 gdb_flush (gdb_stdout);
3152 }
3153
3154 inferior_pid = pid = do_attach (pid);
3155 push_target (&procfs_ops);
3156 }
3157
3158
3159 /* Take a program previously attached to and detaches it.
3160 The program resumes execution and will no longer stop
3161 on signals, etc. We'd better not have left any breakpoints
3162 in the program or it'll die when it hits one. For this
3163 to work, it may be necessary for the process to have been
3164 previously attached. It *might* work if the program was
3165 started via the normal ptrace (PTRACE_TRACEME). */
3166
3167 static void
3168 procfs_detach (args, from_tty)
3169 char *args;
3170 int from_tty;
3171 {
3172 int siggnal = 0;
3173
3174 if (from_tty)
3175 {
3176 char *exec_file = get_exec_file (0);
3177 if (exec_file == 0)
3178 exec_file = "";
3179 printf_unfiltered ("Detaching from program: %s %s\n",
3180 exec_file, target_pid_to_str (inferior_pid));
3181 gdb_flush (gdb_stdout);
3182 }
3183 if (args)
3184 siggnal = atoi (args);
3185
3186 do_detach (siggnal);
3187 inferior_pid = 0;
3188 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
3189 }
3190
3191 /* Get ready to modify the registers array. On machines which store
3192 individual registers, this doesn't need to do anything. On machines
3193 which store all the registers in one fell swoop, this makes sure
3194 that registers contains all the registers from the program being
3195 debugged. */
3196
3197 static void
3198 procfs_prepare_to_store ()
3199 {
3200 #ifdef CHILD_PREPARE_TO_STORE
3201 CHILD_PREPARE_TO_STORE ();
3202 #endif
3203 }
3204
3205 /* Print status information about what we're accessing. */
3206
3207 static void
3208 procfs_files_info (ignore)
3209 struct target_ops *ignore;
3210 {
3211 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3212 attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid));
3213 }
3214
3215 /* ARGSUSED */
3216 static void
3217 procfs_open (arg, from_tty)
3218 char *arg;
3219 int from_tty;
3220 {
3221 error ("Use the \"run\" command to start a Unix child process.");
3222 }
3223
3224 /*
3225
3226 LOCAL FUNCTION
3227
3228 do_attach -- attach to an already existing process
3229
3230 SYNOPSIS
3231
3232 int do_attach (int pid)
3233
3234 DESCRIPTION
3235
3236 Attach to an already existing process with the specified process
3237 id. If the process is not already stopped, query whether to
3238 stop it or not.
3239
3240 NOTES
3241
3242 The option of stopping at attach time is specific to the /proc
3243 versions of gdb. Versions using ptrace force the attachee
3244 to stop. (I have changed this version to do so, too. All you
3245 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3246
3247 */
3248
3249 static int
3250 do_attach (pid)
3251 int pid;
3252 {
3253 struct procinfo *pi;
3254 struct sig_ctl sctl;
3255 struct flt_ctl fctl;
3256 int nlwp, *lwps;
3257
3258 pi = init_procinfo (pid, 0);
3259
3260 #ifdef PIOCLWPIDS
3261 nlwp = pi->prstatus.pr_nlwp;
3262 lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
3263
3264 if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
3265 {
3266 print_sys_errmsg (pi->pathname, errno);
3267 error ("PIOCLWPIDS failed");
3268 }
3269 #else /* PIOCLWPIDS */
3270 nlwp = 1;
3271 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
3272 lwps[0] = 0;
3273 #endif
3274 for (; nlwp > 0; nlwp--, lwps++)
3275 {
3276 /* First one has already been created above. */
3277 if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
3278 pi = init_procinfo ((*lwps << 16) | pid, 0);
3279
3280 if (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP))
3281 {
3282 pi->was_stopped = 1;
3283 }
3284 else
3285 {
3286 pi->was_stopped = 0;
3287 if (1 || query ("Process is currently running, stop it? "))
3288 {
3289 long cmd;
3290 /* Make it run again when we close it. */
3291 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3292 #ifdef PROCFS_USE_READ_WRITE
3293 cmd = PCSTOP;
3294 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3295 #else
3296 if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
3297 #endif
3298 {
3299 print_sys_errmsg (pi->pathname, errno);
3300 close_proc_file (pi);
3301 error ("PIOCSTOP failed");
3302 }
3303 #ifdef UNIXWARE
3304 if (!procfs_read_status (pi))
3305 {
3306 print_sys_errmsg (pi->pathname, errno);
3307 close_proc_file (pi);
3308 error ("procfs_read_status failed");
3309 }
3310 #endif
3311 pi->nopass_next_sigstop = 1;
3312 }
3313 else
3314 {
3315 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3316 target_pid_to_str (pi->pid));
3317 }
3318 }
3319
3320 #ifdef PROCFS_USE_READ_WRITE
3321 fctl.cmd = PCSFAULT;
3322 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
3323 print_sys_errmsg ("PCSFAULT failed", errno);
3324 #else /* PROCFS_USE_READ_WRITE */
3325 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
3326 {
3327 print_sys_errmsg ("PIOCSFAULT failed", errno);
3328 }
3329 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
3330 {
3331 print_sys_errmsg ("PIOCSTRACE failed", errno);
3332 }
3333 add_thread (pi->pid);
3334 procfs_set_inferior_syscall_traps (pi);
3335 #endif /* PROCFS_USE_READ_WRITE */
3336 }
3337 attach_flag = 1;
3338 return (pi->pid);
3339 }
3340
3341 /*
3342
3343 LOCAL FUNCTION
3344
3345 do_detach -- detach from an attached-to process
3346
3347 SYNOPSIS
3348
3349 void do_detach (int signal)
3350
3351 DESCRIPTION
3352
3353 Detach from the current attachee.
3354
3355 If signal is non-zero, the attachee is started running again and sent
3356 the specified signal.
3357
3358 If signal is zero and the attachee was not already stopped when we
3359 attached to it, then we make it runnable again when we detach.
3360
3361 Otherwise, we query whether or not to make the attachee runnable
3362 again, since we may simply want to leave it in the state it was in
3363 when we attached.
3364
3365 We report any problems, but do not consider them errors, since we
3366 MUST detach even if some things don't seem to go right. This may not
3367 be the ideal situation. (FIXME).
3368 */
3369
3370 static void
3371 do_detach (signal)
3372 int signal;
3373 {
3374 struct procinfo *pi;
3375
3376 for (pi = procinfo_list; pi; pi = pi->next)
3377 {
3378 if (signal)
3379 {
3380 set_proc_siginfo (pi, signal);
3381 }
3382 #ifdef PROCFS_USE_READ_WRITE
3383 pi->saved_exitset.cmd = PCSEXIT;
3384 if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
3385 sizeof (struct sys_ctl)) < 0)
3386 #else
3387 if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
3388 #endif
3389 {
3390 print_sys_errmsg (pi->pathname, errno);
3391 printf_unfiltered ("PIOCSEXIT failed.\n");
3392 }
3393 #ifdef PROCFS_USE_READ_WRITE
3394 pi->saved_entryset.cmd = PCSENTRY;
3395 if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
3396 sizeof (struct sys_ctl)) < 0)
3397 #else
3398 if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
3399 #endif
3400 {
3401 print_sys_errmsg (pi->pathname, errno);
3402 printf_unfiltered ("PIOCSENTRY failed.\n");
3403 }
3404 #ifdef PROCFS_USE_READ_WRITE
3405 pi->saved_trace.cmd = PCSTRACE;
3406 if (write (pi->ctl_fd, (char *) &pi->saved_trace,
3407 sizeof (struct sig_ctl)) < 0)
3408 #else
3409 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
3410 #endif
3411 {
3412 print_sys_errmsg (pi->pathname, errno);
3413 printf_unfiltered ("PIOCSTRACE failed.\n");
3414 }
3415 #ifndef UNIXWARE
3416 if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
3417 {
3418 print_sys_errmsg (pi->pathname, errno);
3419 printf_unfiltered ("PIOSCHOLD failed.\n");
3420 }
3421 #endif
3422 #ifdef PROCFS_USE_READ_WRITE
3423 pi->saved_fltset.cmd = PCSFAULT;
3424 if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
3425 sizeof (struct flt_ctl)) < 0)
3426 #else
3427 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
3428 #endif
3429 {
3430 print_sys_errmsg (pi->pathname, errno);
3431 printf_unfiltered ("PIOCSFAULT failed.\n");
3432 }
3433 if (!procfs_read_status (pi))
3434 {
3435 print_sys_errmsg (pi->pathname, errno);
3436 printf_unfiltered ("procfs_read_status failed.\n");
3437 }
3438 else
3439 {
3440 if (signal
3441 || (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
3442 {
3443 long cmd;
3444 struct proc_ctl pctl;
3445
3446 if (signal || !pi->was_stopped ||
3447 query ("Was stopped when attached, make it runnable again? "))
3448 {
3449 /* Clear any pending signal if we want to detach without
3450 a signal. */
3451 if (signal == 0)
3452 set_proc_siginfo (pi, signal);
3453
3454 /* Clear any fault that might have stopped it. */
3455 #ifdef PROCFS_USE_READ_WRITE
3456 cmd = PCCFAULT;
3457 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3458 #else
3459 if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
3460 #endif
3461 {
3462 print_sys_errmsg (pi->pathname, errno);
3463 printf_unfiltered ("PIOCCFAULT failed.\n");
3464 }
3465
3466 /* Make it run again when we close it. */
3467
3468 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3469 }
3470 }
3471 }
3472 close_proc_file (pi);
3473 }
3474 attach_flag = 0;
3475 }
3476
3477 /* emulate wait() as much as possible.
3478 Wait for child to do something. Return pid of child, or -1 in case
3479 of error; store status in *OURSTATUS.
3480
3481 Not sure why we can't
3482 just use wait(), but it seems to have problems when applied to a
3483 process being controlled with the /proc interface.
3484
3485 We have a race problem here with no obvious solution. We need to let
3486 the inferior run until it stops on an event of interest, which means
3487 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3488 ioctl if the process is already stopped on something that is not an
3489 event of interest, or the call will hang indefinitely. Thus we first
3490 use PIOCSTATUS to see if the process is not stopped. If not, then we
3491 use PIOCWSTOP. But during the window between the two, if the process
3492 stops for any reason that is not an event of interest (such as a job
3493 control signal) then gdb will hang. One possible workaround is to set
3494 an alarm to wake up every minute of so and check to see if the process
3495 is still running, and if so, then reissue the PIOCWSTOP. But this is
3496 a real kludge, so has not been implemented. FIXME: investigate
3497 alternatives.
3498
3499 FIXME: Investigate why wait() seems to have problems with programs
3500 being control by /proc routines. */
3501 static int
3502 procfs_wait (pid, ourstatus)
3503 int pid;
3504 struct target_waitstatus *ourstatus;
3505 {
3506 short what;
3507 short why;
3508 int statval = 0;
3509 int checkerr = 0;
3510 int rtnval = -1;
3511 struct procinfo *pi;
3512 struct proc_ctl pctl;
3513
3514 scan_again:
3515
3516 /* handle all syscall events first, otherwise we might not
3517 notice a thread was created until too late. */
3518
3519 for (pi = procinfo_list; pi; pi = pi->next)
3520 {
3521 if (!pi->had_event)
3522 continue;
3523
3524 if (!(THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
3525 continue;
3526
3527 why = THE_PR_LWP (pi->prstatus).pr_why;
3528 what = THE_PR_LWP (pi->prstatus).pr_what;
3529 if (why == PR_SYSENTRY || why == PR_SYSEXIT)
3530 {
3531 int i;
3532 int found_handler = 0;
3533
3534 for (i = 0; i < pi->num_syscall_handlers; i++)
3535 if (pi->syscall_handlers[i].syscall_num == what)
3536 {
3537 found_handler = 1;
3538 pi->saved_rtnval = pi->pid;
3539 pi->saved_statval = 0;
3540 if (!pi->syscall_handlers[i].func
3541 (pi, what, why, &pi->saved_rtnval, &pi->saved_statval))
3542 pi->had_event = 0;
3543 break;
3544 }
3545
3546 if (!found_handler)
3547 {
3548 if (why == PR_SYSENTRY)
3549 error ("PR_SYSENTRY, unhandled system call %d", what);
3550 else
3551 error ("PR_SYSEXIT, unhandled system call %d", what);
3552 }
3553 }
3554 }
3555
3556 /* find a relevant process with an event */
3557
3558 for (pi = procinfo_list; pi; pi = pi->next)
3559 if (pi->had_event && (pid == -1 || pi->pid == pid))
3560 break;
3561
3562 if (!pi)
3563 {
3564 wait_fd ();
3565 goto scan_again;
3566 }
3567
3568 if (!checkerr
3569 && !(THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
3570 {
3571 if (!procfs_write_pcwstop (pi))
3572 {
3573 checkerr++;
3574 }
3575 }
3576 if (checkerr)
3577 {
3578 if (errno == ENOENT)
3579 {
3580 /* XXX Fixme -- what to do if attached? Can't call wait... */
3581 rtnval = wait (&statval);
3582 if ((rtnval) != (PIDGET (inferior_pid)))
3583 {
3584 print_sys_errmsg (pi->pathname, errno);
3585 error ("procfs_wait: wait failed, returned %d", rtnval);
3586 /* NOTREACHED */
3587 }
3588 }
3589 else
3590 {
3591 print_sys_errmsg (pi->pathname, errno);
3592 error ("PIOCSTATUS or PIOCWSTOP failed.");
3593 /* NOTREACHED */
3594 }
3595 }
3596 else if (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP))
3597 {
3598 #ifdef UNIXWARE
3599 rtnval = pi->prstatus.pr_pid;
3600 #else
3601 rtnval = pi->pid;
3602 #endif
3603 why = THE_PR_LWP (pi->prstatus).pr_why;
3604 what = THE_PR_LWP (pi->prstatus).pr_what;
3605
3606 switch (why)
3607 {
3608 case PR_SIGNALLED:
3609 statval = (what << 8) | 0177;
3610 break;
3611 case PR_SYSENTRY:
3612 case PR_SYSEXIT:
3613 rtnval = pi->saved_rtnval;
3614 statval = pi->saved_statval;
3615 break;
3616 case PR_REQUESTED:
3617 statval = (SIGSTOP << 8) | 0177;
3618 break;
3619 case PR_JOBCONTROL:
3620 statval = (what << 8) | 0177;
3621 break;
3622 case PR_FAULTED:
3623 switch (what)
3624 {
3625 #ifdef FLTWATCH
3626 case FLTWATCH:
3627 statval = (SIGTRAP << 8) | 0177;
3628 break;
3629 #endif
3630 #ifdef FLTKWATCH
3631 case FLTKWATCH:
3632 statval = (SIGTRAP << 8) | 0177;
3633 break;
3634 #endif
3635 #ifndef FAULTED_USE_SIGINFO
3636 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3637 Solaris fills in si_signo. I'm not sure about others. */
3638 case FLTPRIV:
3639 case FLTILL:
3640 statval = (SIGILL << 8) | 0177;
3641 break;
3642 case FLTBPT:
3643 case FLTTRACE:
3644 statval = (SIGTRAP << 8) | 0177;
3645 break;
3646 case FLTSTACK:
3647 case FLTACCESS:
3648 case FLTBOUNDS:
3649 statval = (SIGSEGV << 8) | 0177;
3650 break;
3651 case FLTIOVF:
3652 case FLTIZDIV:
3653 case FLTFPE:
3654 statval = (SIGFPE << 8) | 0177;
3655 break;
3656 case FLTPAGE: /* Recoverable page fault */
3657 #endif /* not FAULTED_USE_SIGINFO */
3658 default:
3659 /* Use the signal which the kernel assigns. This is better than
3660 trying to second-guess it from the fault. In fact, I suspect
3661 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3662 statval =
3663 ((THE_PR_LWP (pi->prstatus).pr_info.si_signo) << 8) | 0177;
3664 break;
3665 }
3666 break;
3667 default:
3668 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
3669 }
3670 /* Stop all the other threads when any of them stops. */
3671
3672 {
3673 struct procinfo *procinfo, *next_pi;
3674
3675 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3676 {
3677 next_pi = procinfo->next;
3678 if (!procinfo->had_event)
3679 {
3680 #ifdef PROCFS_USE_READ_WRITE
3681 long cmd = PCSTOP;
3682 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3683 {
3684 print_sys_errmsg (procinfo->pathname, errno);
3685 error ("PCSTOP failed");
3686 }
3687 #else
3688 /* A bug in Solaris (2.5) causes us to hang when trying to
3689 stop a stopped process. So, we have to check first in
3690 order to avoid the hang. */
3691 if (!procfs_read_status (procinfo))
3692 {
3693 /* The LWP has apparently terminated. */
3694 if (info_verbose)
3695 printf_filtered ("LWP %d doesn't respond.\n",
3696 (procinfo->pid >> 16) & 0xffff);
3697 close_proc_file (procinfo);
3698 continue;
3699 }
3700
3701 if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
3702 if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
3703 < 0)
3704 {
3705 print_sys_errmsg (procinfo->pathname, errno);
3706 warning ("PIOCSTOP failed");
3707 }
3708 #endif
3709 }
3710 }
3711 }
3712 }
3713 else
3714 {
3715 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3716 THE_PR_LWP (pi->prstatus).pr_flags);
3717 }
3718
3719 store_waitstatus (ourstatus, statval);
3720
3721 if (rtnval == -1) /* No more children to wait for */
3722 {
3723 warning ("Child process unexpectedly missing");
3724 /* Claim it exited with unknown signal. */
3725 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3726 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
3727 return rtnval;
3728 }
3729
3730 pi->had_event = 0; /* Indicate that we've seen this one */
3731 return (rtnval);
3732 }
3733
3734 /*
3735
3736 LOCAL FUNCTION
3737
3738 set_proc_siginfo - set a process's current signal info
3739
3740 SYNOPSIS
3741
3742 void set_proc_siginfo (struct procinfo *pip, int signo);
3743
3744 DESCRIPTION
3745
3746 Given a pointer to a process info struct in PIP and a signal number
3747 in SIGNO, set the process's current signal and its associated signal
3748 information. The signal will be delivered to the process immediately
3749 after execution is resumed, even if it is being held. In addition,
3750 this particular delivery will not cause another PR_SIGNALLED stop
3751 even if the signal is being traced.
3752
3753 If we are not delivering the same signal that the prstatus siginfo
3754 struct contains information about, then synthesize a siginfo struct
3755 to match the signal we are going to deliver, make it of the type
3756 "generated by a user process", and send this synthesized copy. When
3757 used to set the inferior's signal state, this will be required if we
3758 are not currently stopped because of a traced signal, or if we decide
3759 to continue with a different signal.
3760
3761 Note that when continuing the inferior from a stop due to receipt
3762 of a traced signal, we either have set PRCSIG to clear the existing
3763 signal, or we have to call this function to do a PIOCSSIG with either
3764 the existing siginfo struct from pr_info, or one we have synthesized
3765 appropriately for the signal we want to deliver. Otherwise if the
3766 signal is still being traced, the inferior will immediately stop
3767 again.
3768
3769 See siginfo(5) for more details.
3770 */
3771
3772 static void
3773 set_proc_siginfo (pip, signo)
3774 struct procinfo *pip;
3775 int signo;
3776 {
3777 struct siginfo newsiginfo;
3778 struct siginfo *sip;
3779 struct sigi_ctl sictl;
3780
3781 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3782 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3783 receives a PIOCSSIG with a signal identical to the current signal,
3784 it messes up the current signal. Work around the kernel bug. */
3785 if (signo == THE_PR_LWP (pip->prstatus).pr_cursig)
3786 return;
3787 #endif
3788
3789 #ifdef UNIXWARE
3790 if (signo == THE_PR_LWP (pip->prstatus).pr_info.si_signo)
3791 {
3792 memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info,
3793 sizeof (siginfo_t));
3794 }
3795 #else
3796 if (signo == THE_PR_LWP (pip->prstatus).pr_info.si_signo)
3797 {
3798 sip = &pip->prstatus.pr_info;
3799 }
3800 #endif
3801 else
3802 {
3803 #ifdef UNIXWARE
3804 siginfo_t *sip = &sictl.siginfo;
3805 memset ((char *) sip, 0, sizeof (siginfo_t));
3806 #else
3807 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
3808 sip = &newsiginfo;
3809 #endif
3810 sip->si_signo = signo;
3811 sip->si_code = 0;
3812 sip->si_errno = 0;
3813 sip->si_pid = getpid ();
3814 sip->si_uid = getuid ();
3815 }
3816 #ifdef PROCFS_USE_READ_WRITE
3817 sictl.cmd = PCSSIG;
3818 if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0)
3819 #else
3820 if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0)
3821 #endif
3822 {
3823 print_sys_errmsg (pip->pathname, errno);
3824 warning ("PIOCSSIG failed");
3825 }
3826 }
3827
3828 /* Resume execution of process PID. If STEP is nozero, then
3829 just single step it. If SIGNAL is nonzero, restart it with that
3830 signal activated. */
3831
3832 static void
3833 procfs_resume (pid, step, signo)
3834 int pid;
3835 int step;
3836 enum target_signal signo;
3837 {
3838 int signal_to_pass;
3839 struct procinfo *pi, *procinfo, *next_pi;
3840 struct proc_ctl pctl;
3841
3842 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3843
3844 errno = 0;
3845 #ifdef UNIXWARE
3846 pctl.cmd = PCRUN;
3847 pctl.data = PRCFAULT;
3848 #else
3849 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
3850 #endif
3851
3852 #if 0
3853 /* It should not be necessary. If the user explicitly changes the value,
3854 value_assign calls write_register_bytes, which writes it. */
3855 /* It may not be absolutely necessary to specify the PC value for
3856 restarting, but to be safe we use the value that gdb considers
3857 to be current. One case where this might be necessary is if the
3858 user explicitly changes the PC value that gdb considers to be
3859 current. FIXME: Investigate if this is necessary or not. */
3860
3861 #ifdef PRSVADDR_BROKEN
3862 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3863 place to put nPC. In fact, if you use this, nPC seems to be set to some
3864 random garbage. We have to rely on the fact that PC and nPC have been
3865 written previously via PIOCSREG during a register flush. */
3866
3867 pi->prrun.pr_vaddr = (caddr_t) * (int *) &registers[REGISTER_BYTE (PC_REGNUM)];
3868 pi->prrun.pr_flags != PRSVADDR;
3869 #endif
3870 #endif
3871
3872 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
3873 /* When attaching to a child process, if we forced it to stop with
3874 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3875 Upon resuming the first time after such a stop, we explicitly
3876 inhibit sending it another SIGSTOP, which would be the normal
3877 result of default signal handling. One potential drawback to
3878 this is that we will also ignore any attempt to by the user
3879 to explicitly continue after the attach with a SIGSTOP. Ultimately
3880 this problem should be dealt with by making the routines that
3881 deal with the inferior a little smarter, and possibly even allow
3882 an inferior to continue running at the same time as gdb. (FIXME?) */
3883 signal_to_pass = 0;
3884 else if (signo == TARGET_SIGNAL_TSTP
3885 && THE_PR_LWP (pi->prstatus).pr_cursig == SIGTSTP
3886 && THE_PR_LWP (pi->prstatus).pr_action.sa_handler == SIG_DFL
3887 )
3888
3889 /* We are about to pass the inferior a SIGTSTP whose action is
3890 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3891 (notifying the parent via wait()), and then keep going from the
3892 same place when the parent is ready for you to keep going. So
3893 under the debugger, it should do nothing (as if the program had
3894 been stopped and then later resumed. Under ptrace, this
3895 happens for us, but under /proc, the system obligingly stops
3896 the process, and wait_for_inferior would have no way of
3897 distinguishing that type of stop (which indicates that we
3898 should just start it again), with a stop due to the pr_trace
3899 field of the prrun_t struct.
3900
3901 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3902 because the handler needs to get executed. */
3903 signal_to_pass = 0;
3904 else
3905 signal_to_pass = target_signal_to_host (signo);
3906
3907 if (signal_to_pass)
3908 {
3909 set_proc_siginfo (pi, signal_to_pass);
3910 }
3911 else
3912 {
3913 #ifdef UNIXWARE
3914 pctl.data |= PRCSIG;
3915 #else
3916 pi->prrun.pr_flags |= PRCSIG;
3917 #endif
3918 }
3919 pi->nopass_next_sigstop = 0;
3920 if (step)
3921 {
3922 #ifdef UNIXWARE
3923 pctl.data |= PRSTEP;
3924 #else
3925 pi->prrun.pr_flags |= PRSTEP;
3926 #endif
3927 }
3928 pi->had_event = 0;
3929 /* Don't try to start a process unless it's stopped on an
3930 `event of interest'. Doing so will cause errors. */
3931
3932 if (!procfs_read_status (pi))
3933 {
3934 /* The LWP has apparently terminated. */
3935 if (info_verbose)
3936 printf_filtered ("LWP %d doesn't respond.\n",
3937 (pi->pid >> 16) & 0xffff);
3938 close_proc_file (pi);
3939 }
3940 else
3941 {
3942 #ifdef PROCFS_USE_READ_WRITE
3943 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
3944 #else
3945 if ((pi->prstatus.pr_flags & PR_ISTOP)
3946 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
3947 #endif
3948 {
3949 /* The LWP has apparently terminated. */
3950 if (info_verbose)
3951 printf_filtered ("LWP %d doesn't respond.\n",
3952 (pi->pid >> 16) & 0xffff);
3953 close_proc_file (pi);
3954 }
3955 }
3956
3957 /* Continue all the other threads that haven't had an event of interest.
3958 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3959 set by do_attach, and means this is the first resume after an attach.
3960 All threads were CSTOP'd by do_attach, and should be resumed now. */
3961
3962 if (pid == -1)
3963 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3964 {
3965 next_pi = procinfo->next;
3966 if (pi != procinfo)
3967 if (!procinfo->had_event ||
3968 (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
3969 {
3970 procinfo->had_event = procinfo->nopass_next_sigstop = 0;
3971 #ifdef PROCFS_USE_READ_WRITE
3972 pctl.data = PRCFAULT | PRCSIG;
3973 if (write (procinfo->ctl_fd, (char *) &pctl,
3974 sizeof (struct proc_ctl)) < 0)
3975 {
3976 if (!procfs_read_status (procinfo))
3977 fprintf_unfiltered (gdb_stderr,
3978 "procfs_read_status failed, errno=%d\n",
3979 errno);
3980 print_sys_errmsg (procinfo->pathname, errno);
3981 error ("PCRUN failed");
3982 }
3983 #else
3984 procinfo->prrun.pr_flags &= PRSTEP;
3985 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
3986 if (!procfs_read_status (procinfo))
3987 {
3988 /* The LWP has apparently terminated. */
3989 if (info_verbose)
3990 printf_filtered ("LWP %d doesn't respond.\n",
3991 (procinfo->pid >> 16) & 0xffff);
3992 close_proc_file (procinfo);
3993 continue;
3994 }
3995
3996 /* Don't try to start a process unless it's stopped on an
3997 `event of interest'. Doing so will cause errors. */
3998
3999 if ((procinfo->prstatus.pr_flags & PR_ISTOP)
4000 && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
4001 {
4002 if (!procfs_read_status (procinfo))
4003 fprintf_unfiltered (gdb_stderr,
4004 "procfs_read_status failed, errno=%d\n",
4005 errno);
4006 print_sys_errmsg (procinfo->pathname, errno);
4007 warning ("PIOCRUN failed");
4008 }
4009 #endif
4010 }
4011 procfs_read_status (procinfo);
4012 }
4013 }
4014
4015 /*
4016
4017 LOCAL FUNCTION
4018
4019 procfs_fetch_registers -- fetch current registers from inferior
4020
4021 SYNOPSIS
4022
4023 void procfs_fetch_registers (int regno)
4024
4025 DESCRIPTION
4026
4027 Read the current values of the inferior's registers, both the
4028 general register set and floating point registers (if supported)
4029 and update gdb's idea of their current values.
4030
4031 */
4032
4033 static void
4034 procfs_fetch_registers (regno)
4035 int regno;
4036 {
4037 struct procinfo *pi;
4038
4039 pi = current_procinfo;
4040
4041 #ifdef UNIXWARE
4042 if (procfs_read_status (pi))
4043 {
4044 supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
4045 #if defined (FP0_REGNUM)
4046 supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs);
4047 #endif
4048 }
4049 #else /* UNIXWARE */
4050 if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1)
4051 {
4052 supply_gregset (&pi->gregset.gregset);
4053 }
4054 #if defined (FP0_REGNUM)
4055 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1)
4056 {
4057 supply_fpregset (&pi->fpregset.fpregset);
4058 }
4059 #endif
4060 #endif /* UNIXWARE */
4061 }
4062
4063 /*
4064
4065 LOCAL FUNCTION
4066
4067 proc_init_failed - called when /proc access initialization fails
4068 fails
4069
4070 SYNOPSIS
4071
4072 static void proc_init_failed (struct procinfo *pi,
4073 char *why, int kill_p)
4074
4075 DESCRIPTION
4076
4077 This function is called whenever initialization of access to a /proc
4078 entry fails. It prints a suitable error message, does some cleanup,
4079 and then invokes the standard error processing routine which dumps
4080 us back into the command loop. If KILL_P is true, sends SIGKILL.
4081 */
4082
4083 static void
4084 proc_init_failed (pi, why, kill_p)
4085 struct procinfo *pi;
4086 char *why;
4087 int kill_p;
4088 {
4089 print_sys_errmsg (pi->pathname, errno);
4090 if (kill_p)
4091 kill (pi->pid, SIGKILL);
4092 close_proc_file (pi);
4093 error (why);
4094 /* NOTREACHED */
4095 }
4096
4097 /*
4098
4099 LOCAL FUNCTION
4100
4101 close_proc_file - close any currently open /proc entry
4102
4103 SYNOPSIS
4104
4105 static void close_proc_file (struct procinfo *pip)
4106
4107 DESCRIPTION
4108
4109 Close any currently open /proc entry and mark the process information
4110 entry as invalid. In order to ensure that we don't try to reuse any
4111 stale information, the pid, fd, and pathnames are explicitly
4112 invalidated, which may be overkill.
4113
4114 */
4115
4116 static void
4117 close_proc_file (pip)
4118 struct procinfo *pip;
4119 {
4120 struct procinfo *procinfo;
4121
4122 delete_thread (pip->pid); /* remove thread from GDB's thread list */
4123 remove_fd (pip); /* Remove fd from poll/select list */
4124
4125 close (pip->ctl_fd);
4126 #ifdef HAVE_MULTIPLE_PROC_FDS
4127 close (pip->as_fd);
4128 close (pip->status_fd);
4129 close (pip->map_fd);
4130 #endif
4131
4132 free (pip->pathname);
4133
4134 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4135
4136 if (procinfo_list == pip)
4137 procinfo_list = pip->next;
4138 else
4139 {
4140 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
4141 {
4142 if (procinfo->next == pip)
4143 {
4144 procinfo->next = pip->next;
4145 break;
4146 }
4147 }
4148 free (pip);
4149 }
4150 }
4151
4152 static void
4153 close_proc_file_cleanup (pip)
4154 void *pip;
4155 {
4156 close_proc_file ((struct procinfo *) pip);
4157 }
4158
4159 static struct cleanup *
4160 make_cleanup_close_proc_file (pip)
4161 struct procinfo *pip;
4162 {
4163 return make_cleanup (close_proc_file_cleanup, pip);
4164 }
4165
4166 /*
4167
4168 LOCAL FUNCTION
4169
4170 open_proc_file - open a /proc entry for a given process id
4171
4172 SYNOPSIS
4173
4174 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4175
4176 DESCRIPTION
4177
4178 Given a process id and a mode, close the existing open /proc
4179 entry (if any) and open one for the new process id, in the
4180 specified mode. Once it is open, then mark the local process
4181 information structure as valid, which guarantees that the pid,
4182 fd, and pathname fields match an open /proc entry. Returns
4183 zero if the open fails, nonzero otherwise.
4184
4185 Note that the pathname is left intact, even when the open fails,
4186 so that callers can use it to construct meaningful error messages
4187 rather than just "file open failed".
4188
4189 Note that for Solaris, the process-id also includes an LWP-id, so we
4190 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4191 then we will ask the kernel what it is and add it to the pid. Hence,
4192 the pid can be changed by us.
4193 */
4194
4195 static int
4196 open_proc_file (pid, pip, mode, control)
4197 int pid;
4198 struct procinfo *pip;
4199 int mode;
4200 int control;
4201 {
4202 int tmp, tmpfd;
4203
4204 pip->next = NULL;
4205 pip->had_event = 0;
4206 pip->pathname = xmalloc (MAX_PROC_NAME_SIZE);
4207 pip->pid = pid;
4208
4209 #ifndef PIOCOPENLWP
4210 tmp = pid;
4211 #else
4212 tmp = pid & 0xffff;
4213 #endif
4214
4215 #ifdef HAVE_MULTIPLE_PROC_FDS
4216 sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp);
4217 if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0)
4218 {
4219 return 0;
4220 }
4221
4222 sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp);
4223 if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0)
4224 {
4225 close (pip->status_fd);
4226 return 0;
4227 }
4228
4229 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4230 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4231 {
4232 close (pip->status_fd);
4233 close (pip->as_fd);
4234 return 0;
4235 }
4236
4237 if (control)
4238 {
4239 sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
4240 if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0)
4241 {
4242 close (pip->status_fd);
4243 close (pip->as_fd);
4244 close (pip->map_fd);
4245 return 0;
4246 }
4247 }
4248
4249 #else /* HAVE_MULTIPLE_PROC_FDS */
4250 sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
4251
4252 if ((tmpfd = open (pip->pathname, mode)) < 0)
4253 return 0;
4254
4255 #ifndef PIOCOPENLWP
4256 pip->ctl_fd = tmpfd;
4257 pip->as_fd = tmpfd;
4258 pip->map_fd = tmpfd;
4259 pip->status_fd = tmpfd;
4260 #else
4261 tmp = (pid >> 16) & 0xffff; /* Extract thread id */
4262
4263 if (tmp == 0)
4264 { /* Don't know thread id yet */
4265 if (ioctl (tmpfd, PIOCSTATUS, &pip->prstatus) < 0)
4266 {
4267 print_sys_errmsg (pip->pathname, errno);
4268 close (tmpfd);
4269 error ("open_proc_file: PIOCSTATUS failed");
4270 }
4271
4272 tmp = pip->prstatus.pr_who; /* Get thread id from prstatus_t */
4273 pip->pid = (tmp << 16) | pid; /* Update pip */
4274 }
4275
4276 if ((pip->ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0)
4277 {
4278 close (tmpfd);
4279 return 0;
4280 }
4281
4282 #ifdef PIOCSET /* New method */
4283 {
4284 long pr_flags;
4285 pr_flags = PR_ASYNC;
4286 ioctl (pip->ctl_fd, PIOCSET, &pr_flags);
4287 }
4288 #endif
4289
4290 /* keep extra fds in sync */
4291 pip->as_fd = pip->ctl_fd;
4292 pip->map_fd = pip->ctl_fd;
4293 pip->status_fd = pip->ctl_fd;
4294
4295 close (tmpfd); /* All done with main pid */
4296 #endif /* PIOCOPENLWP */
4297
4298 #endif /* HAVE_MULTIPLE_PROC_FDS */
4299
4300 return 1;
4301 }
4302
4303 static char *
4304 mappingflags (flags)
4305 long flags;
4306 {
4307 static char asciiflags[8];
4308
4309 strcpy (asciiflags, "-------");
4310 #if defined (MA_PHYS)
4311 if (flags & MA_PHYS)
4312 asciiflags[0] = 'd';
4313 #endif
4314 if (flags & MA_STACK)
4315 asciiflags[1] = 's';
4316 if (flags & MA_BREAK)
4317 asciiflags[2] = 'b';
4318 if (flags & MA_SHARED)
4319 asciiflags[3] = 's';
4320 if (flags & MA_READ)
4321 asciiflags[4] = 'r';
4322 if (flags & MA_WRITE)
4323 asciiflags[5] = 'w';
4324 if (flags & MA_EXEC)
4325 asciiflags[6] = 'x';
4326 return (asciiflags);
4327 }
4328
4329 static void
4330 info_proc_flags (pip, summary)
4331 struct procinfo *pip;
4332 int summary;
4333 {
4334 struct trans *transp;
4335 #ifdef UNIXWARE
4336 long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags;
4337 #else
4338 long flags = pip->prstatus.pr_flags;
4339 #endif
4340
4341 printf_filtered ("%-32s", "Process status flags:");
4342 if (!summary)
4343 {
4344 printf_filtered ("\n\n");
4345 }
4346 for (transp = pr_flag_table; transp->name != NULL; transp++)
4347 {
4348 if (flags & transp->value)
4349 {
4350 if (summary)
4351 {
4352 printf_filtered ("%s ", transp->name);
4353 }
4354 else
4355 {
4356 printf_filtered ("\t%-16s %s.\n", transp->name, transp->desc);
4357 }
4358 }
4359 }
4360 printf_filtered ("\n");
4361 }
4362
4363 static void
4364 info_proc_stop (pip, summary)
4365 struct procinfo *pip;
4366 int summary;
4367 {
4368 struct trans *transp;
4369 int why;
4370 int what;
4371
4372 why = THE_PR_LWP (pip->prstatus).pr_why;
4373 what = THE_PR_LWP (pip->prstatus).pr_what;
4374
4375 if (THE_PR_LWP (pip->prstatus).pr_flags & PR_STOPPED)
4376 {
4377 printf_filtered ("%-32s", "Reason for stopping:");
4378 if (!summary)
4379 {
4380 printf_filtered ("\n\n");
4381 }
4382 for (transp = pr_why_table; transp->name != NULL; transp++)
4383 {
4384 if (why == transp->value)
4385 {
4386 if (summary)
4387 {
4388 printf_filtered ("%s ", transp->name);
4389 }
4390 else
4391 {
4392 printf_filtered ("\t%-16s %s.\n",
4393 transp->name, transp->desc);
4394 }
4395 break;
4396 }
4397 }
4398
4399 /* Use the pr_why field to determine what the pr_what field means, and
4400 print more information. */
4401
4402 switch (why)
4403 {
4404 case PR_REQUESTED:
4405 /* pr_what is unused for this case */
4406 break;
4407 case PR_JOBCONTROL:
4408 case PR_SIGNALLED:
4409 if (summary)
4410 {
4411 printf_filtered ("%s ", signalname (what));
4412 }
4413 else
4414 {
4415 printf_filtered ("\t%-16s %s.\n", signalname (what),
4416 safe_strsignal (what));
4417 }
4418 break;
4419 case PR_SYSENTRY:
4420 if (summary)
4421 {
4422 printf_filtered ("%s ", syscallname (what));
4423 }
4424 else
4425 {
4426 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4427 "Entered this system call");
4428 }
4429 break;
4430 case PR_SYSEXIT:
4431 if (summary)
4432 {
4433 printf_filtered ("%s ", syscallname (what));
4434 }
4435 else
4436 {
4437 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4438 "Returned from this system call");
4439 }
4440 break;
4441 case PR_FAULTED:
4442 if (summary)
4443 {
4444 printf_filtered ("%s ",
4445 lookupname (faults_table, what, "fault"));
4446 }
4447 else
4448 {
4449 printf_filtered ("\t%-16s %s.\n",
4450 lookupname (faults_table, what, "fault"),
4451 lookupdesc (faults_table, what));
4452 }
4453 break;
4454 }
4455 printf_filtered ("\n");
4456 }
4457 }
4458
4459 static void
4460 info_proc_siginfo (pip, summary)
4461 struct procinfo *pip;
4462 int summary;
4463 {
4464 struct siginfo *sip;
4465
4466 if ((THE_PR_LWP (pip->prstatus).pr_flags & PR_STOPPED) &&
4467 (THE_PR_LWP (pip->prstatus).pr_why == PR_SIGNALLED ||
4468 THE_PR_LWP (pip->prstatus).pr_why == PR_FAULTED))
4469 {
4470 printf_filtered ("%-32s", "Additional signal/fault info:");
4471 sip = &(THE_PR_LWP (pip->prstatus).pr_info);
4472 if (summary)
4473 {
4474 printf_filtered ("%s ", signalname (sip->si_signo));
4475 if (sip->si_errno > 0)
4476 {
4477 printf_filtered ("%s ", errnoname (sip->si_errno));
4478 }
4479 if (sip->si_code <= 0)
4480 {
4481 printf_filtered ("sent by %s, uid %d ",
4482 target_pid_to_str (sip->si_pid),
4483 sip->si_uid);
4484 }
4485 else
4486 {
4487 printf_filtered ("%s ", sigcodename (sip));
4488 if ((sip->si_signo == SIGILL) ||
4489 (sip->si_signo == SIGFPE) ||
4490 (sip->si_signo == SIGSEGV) ||
4491 (sip->si_signo == SIGBUS))
4492 {
4493 printf_filtered ("addr=%#lx ",
4494 (unsigned long) sip->si_addr);
4495 }
4496 else if ((sip->si_signo == SIGCHLD))
4497 {
4498 printf_filtered ("child %s, status %u ",
4499 target_pid_to_str (sip->si_pid),
4500 sip->si_status);
4501 }
4502 else if ((sip->si_signo == SIGPOLL))
4503 {
4504 printf_filtered ("band %u ", sip->si_band);
4505 }
4506 }
4507 }
4508 else
4509 {
4510 printf_filtered ("\n\n");
4511 printf_filtered ("\t%-16s %s.\n", signalname (sip->si_signo),
4512 safe_strsignal (sip->si_signo));
4513 if (sip->si_errno > 0)
4514 {
4515 printf_filtered ("\t%-16s %s.\n",
4516 errnoname (sip->si_errno),
4517 safe_strerror (sip->si_errno));
4518 }
4519 if (sip->si_code <= 0)
4520 {
4521 printf_filtered ("\t%-16u %s\n", sip->si_pid, /* XXX need target_pid_to_str() */
4522 "PID of process sending signal");
4523 printf_filtered ("\t%-16u %s\n", sip->si_uid,
4524 "UID of process sending signal");
4525 }
4526 else
4527 {
4528 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
4529 sigcodedesc (sip));
4530 if ((sip->si_signo == SIGILL) ||
4531 (sip->si_signo == SIGFPE))
4532 {
4533 printf_filtered ("\t%#-16lx %s.\n",
4534 (unsigned long) sip->si_addr,
4535 "Address of faulting instruction");
4536 }
4537 else if ((sip->si_signo == SIGSEGV) ||
4538 (sip->si_signo == SIGBUS))
4539 {
4540 printf_filtered ("\t%#-16lx %s.\n",
4541 (unsigned long) sip->si_addr,
4542 "Address of faulting memory reference");
4543 }
4544 else if ((sip->si_signo == SIGCHLD))
4545 {
4546 printf_filtered ("\t%-16u %s.\n", sip->si_pid, /* XXX need target_pid_to_str() */
4547 "Child process ID");
4548 printf_filtered ("\t%-16u %s.\n", sip->si_status,
4549 "Child process exit value or signal");
4550 }
4551 else if ((sip->si_signo == SIGPOLL))
4552 {
4553 printf_filtered ("\t%-16u %s.\n", sip->si_band,
4554 "Band event for POLL_{IN,OUT,MSG}");
4555 }
4556 }
4557 }
4558 printf_filtered ("\n");
4559 }
4560 }
4561
4562 static void
4563 info_proc_syscalls (pip, summary)
4564 struct procinfo *pip;
4565 int summary;
4566 {
4567 int syscallnum;
4568
4569 if (!summary)
4570 {
4571
4572 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4573 if (pip->prstatus.pr_flags & PR_ASLEEP)
4574 {
4575 int syscallnum = pip->prstatus.pr_reg[R_D0];
4576 if (summary)
4577 {
4578 printf_filtered ("%-32s", "Sleeping in system call:");
4579 printf_filtered ("%s", syscallname (syscallnum));
4580 }
4581 else
4582 {
4583 printf_filtered ("Sleeping in system call '%s'.\n",
4584 syscallname (syscallnum));
4585 }
4586 }
4587 #endif
4588
4589 #ifndef UNIXWARE
4590 if (ioctl (pip->ctl_fd, PIOCGENTRY, &pip->entryset) < 0)
4591 {
4592 print_sys_errmsg (pip->pathname, errno);
4593 error ("PIOCGENTRY failed");
4594 }
4595
4596 if (ioctl (pip->ctl_fd, PIOCGEXIT, &pip->exitset) < 0)
4597 {
4598 print_sys_errmsg (pip->pathname, errno);
4599 error ("PIOCGEXIT failed");
4600 }
4601 #endif
4602
4603 printf_filtered ("System call tracing information:\n\n");
4604
4605 printf_filtered ("\t%-12s %-8s %-8s\n",
4606 "System call",
4607 "Entry",
4608 "Exit");
4609 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
4610 {
4611 QUIT;
4612 if (syscall_table[syscallnum] != NULL)
4613 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
4614 else
4615 printf_filtered ("\t%-12d ", syscallnum);
4616
4617 #ifdef UNIXWARE
4618 printf_filtered ("%-8s ",
4619 prismember (&pip->prstatus.pr_sysentry, syscallnum)
4620 ? "on" : "off");
4621 printf_filtered ("%-8s ",
4622 prismember (&pip->prstatus.pr_sysexit, syscallnum)
4623 ? "on" : "off");
4624 #else
4625 printf_filtered ("%-8s ",
4626 prismember (&pip->entryset, syscallnum)
4627 ? "on" : "off");
4628 printf_filtered ("%-8s ",
4629 prismember (&pip->exitset, syscallnum)
4630 ? "on" : "off");
4631 #endif
4632 printf_filtered ("\n");
4633 }
4634 printf_filtered ("\n");
4635 }
4636 }
4637
4638 static char *
4639 signalname (signo)
4640 int signo;
4641 {
4642 const char *name;
4643 static char locbuf[32];
4644
4645 name = strsigno (signo);
4646 if (name == NULL)
4647 {
4648 sprintf (locbuf, "Signal %d", signo);
4649 }
4650 else
4651 {
4652 sprintf (locbuf, "%s (%d)", name, signo);
4653 }
4654 return (locbuf);
4655 }
4656
4657 static char *
4658 errnoname (errnum)
4659 int errnum;
4660 {
4661 const char *name;
4662 static char locbuf[32];
4663
4664 name = strerrno (errnum);
4665 if (name == NULL)
4666 {
4667 sprintf (locbuf, "Errno %d", errnum);
4668 }
4669 else
4670 {
4671 sprintf (locbuf, "%s (%d)", name, errnum);
4672 }
4673 return (locbuf);
4674 }
4675
4676 static void
4677 info_proc_signals (pip, summary)
4678 struct procinfo *pip;
4679 int summary;
4680 {
4681 int signo;
4682
4683 if (!summary)
4684 {
4685 #ifndef PROCFS_USE_READ_WRITE
4686 if (ioctl (pip->ctl_fd, PIOCGTRACE, &pip->trace) < 0)
4687 {
4688 print_sys_errmsg (pip->pathname, errno);
4689 error ("PIOCGTRACE failed");
4690 }
4691 #endif
4692
4693 printf_filtered ("Disposition of signals:\n\n");
4694 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4695 "Signal", "Trace", "Hold", "Pending", "Description");
4696 for (signo = 0; signo < NSIG; signo++)
4697 {
4698 QUIT;
4699 printf_filtered ("\t%-15s ", signalname (signo));
4700 #ifdef UNIXWARE
4701 printf_filtered ("%-8s ",
4702 prismember (&pip->prstatus.pr_sigtrace, signo)
4703 ? "on" : "off");
4704 printf_filtered ("%-8s ",
4705 prismember (&pip->prstatus.pr_lwp.pr_context.uc_sigmask, signo)
4706 ? "on" : "off");
4707 #else
4708 printf_filtered ("%-8s ",
4709 prismember (&pip->trace, signo)
4710 ? "on" : "off");
4711 printf_filtered ("%-8s ",
4712 prismember (&pip->prstatus.pr_sighold, signo)
4713 ? "on" : "off");
4714 #endif
4715
4716 #ifdef UNIXWARE
4717 if (prismember (&pip->prstatus.pr_sigpend, signo) ||
4718 prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo))
4719 printf_filtered ("%-8s ", "yes");
4720 else
4721 printf_filtered ("%-8s ", "no");
4722 #else /* UNIXWARE */
4723 #ifdef PROCFS_SIGPEND_OFFSET
4724 /* Alpha OSF/1 numbers the pending signals from 1. */
4725 printf_filtered ("%-8s ",
4726 (signo ? prismember (&pip->prstatus.pr_sigpend,
4727 signo - 1)
4728 : 0)
4729 ? "yes" : "no");
4730 #else
4731 printf_filtered ("%-8s ",
4732 prismember (&pip->prstatus.pr_sigpend, signo)
4733 ? "yes" : "no");
4734 #endif
4735 #endif /* UNIXWARE */
4736 printf_filtered (" %s\n", safe_strsignal (signo));
4737 }
4738 printf_filtered ("\n");
4739 }
4740 }
4741
4742 static void
4743 info_proc_faults (pip, summary)
4744 struct procinfo *pip;
4745 int summary;
4746 {
4747 struct trans *transp;
4748
4749 if (!summary)
4750 {
4751 #ifndef UNIXWARE
4752 if (ioctl (pip->ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0)
4753 {
4754 print_sys_errmsg (pip->pathname, errno);
4755 error ("PIOCGFAULT failed");
4756 }
4757 #endif
4758
4759 printf_filtered ("Current traced hardware fault set:\n\n");
4760 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4761
4762 for (transp = faults_table; transp->name != NULL; transp++)
4763 {
4764 QUIT;
4765 printf_filtered ("\t%-12s ", transp->name);
4766 #ifdef UNIXWARE
4767 printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp->value)
4768 ? "on" : "off");
4769 #else
4770 printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp->value)
4771 ? "on" : "off");
4772 #endif
4773 printf_filtered ("\n");
4774 }
4775 printf_filtered ("\n");
4776 }
4777 }
4778
4779 static void
4780 info_proc_mappings (pip, summary)
4781 struct procinfo *pip;
4782 int summary;
4783 {
4784 int nmap;
4785 struct prmap *prmaps;
4786 struct prmap *prmap;
4787 struct stat sbuf;
4788
4789 if (!summary)
4790 {
4791 printf_filtered ("Mapped address spaces:\n\n");
4792 #ifdef BFD_HOST_64_BIT
4793 printf_filtered (" %18s %18s %10s %10s %7s\n",
4794 #else
4795 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4796 #endif
4797 "Start Addr",
4798 " End Addr",
4799 " Size",
4800 " Offset",
4801 "Flags");
4802 #ifdef PROCFS_USE_READ_WRITE
4803 if (fstat (pip->map_fd, &sbuf) == 0)
4804 {
4805 nmap = sbuf.st_size / sizeof (prmap_t);
4806 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4807 if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) &&
4808 (read (pip->map_fd, (char *) prmaps,
4809 nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps))))
4810 {
4811 int i = 0;
4812 for (prmap = prmaps; i < nmap; ++prmap, ++i)
4813 #else
4814 if (ioctl (pip->ctl_fd, PIOCNMAP, &nmap) == 0)
4815 {
4816 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4817 if (ioctl (pip->ctl_fd, PIOCMAP, prmaps) == 0)
4818 {
4819 for (prmap = prmaps; prmap->pr_size; ++prmap)
4820 #endif /* PROCFS_USE_READ_WRITE */
4821 {
4822 #ifdef BFD_HOST_64_BIT
4823 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4824 #else
4825 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4826 #endif
4827 (unsigned long) prmap->pr_vaddr,
4828 (unsigned long) prmap->pr_vaddr
4829 + prmap->pr_size - 1,
4830 prmap->pr_size,
4831 prmap->pr_off,
4832 mappingflags (prmap->pr_mflags));
4833 }
4834 }
4835 }
4836 printf_filtered ("\n");
4837 }
4838 }
4839
4840 /*
4841
4842 LOCAL FUNCTION
4843
4844 info_proc -- implement the "info proc" command
4845
4846 SYNOPSIS
4847
4848 void info_proc (char *args, int from_tty)
4849
4850 DESCRIPTION
4851
4852 Implement gdb's "info proc" command by using the /proc interface
4853 to print status information about any currently running process.
4854
4855 Examples of the use of "info proc" are:
4856
4857 info proc (prints summary info for current inferior)
4858 info proc 123 (prints summary info for process with pid 123)
4859 info proc mappings (prints address mappings)
4860 info proc times (prints process/children times)
4861 info proc id (prints pid, ppid, gid, sid, etc)
4862 FIXME: i proc id not implemented.
4863 info proc status (prints general process state info)
4864 FIXME: i proc status not implemented.
4865 info proc signals (prints info about signal handling)
4866 info proc all (prints all info)
4867
4868 */
4869
4870 static void
4871 info_proc (args, from_tty)
4872 char *args;
4873 int from_tty;
4874 {
4875 int pid;
4876 struct procinfo *pip;
4877 struct cleanup *old_chain;
4878 char **argv;
4879 int argsize;
4880 int summary = 1;
4881 int flags = 0;
4882 int syscalls = 0;
4883 int signals = 0;
4884 int faults = 0;
4885 int mappings = 0;
4886 int times = 0;
4887 int id = 0;
4888 int status = 0;
4889 int all = 0;
4890 int nlwp;
4891 int *lwps;
4892
4893 old_chain = make_cleanup (null_cleanup, 0);
4894
4895 /* Default to using the current inferior if no pid specified. Note
4896 that inferior_pid may be 0, hence we set okerr. */
4897
4898 pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
4899 if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
4900 pip = procinfo_list; /* take first available */
4901 pid = pid & 0xffff; /* extract "real" pid */
4902
4903 if (args != NULL)
4904 {
4905 if ((argv = buildargv (args)) == NULL)
4906 {
4907 nomem (0);
4908 }
4909 make_cleanup_freeargv (argv);
4910
4911 while (*argv != NULL)
4912 {
4913 argsize = strlen (*argv);
4914 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
4915 {
4916 summary = 0;
4917 all = 1;
4918 }
4919 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
4920 {
4921 summary = 0;
4922 faults = 1;
4923 }
4924 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
4925 {
4926 summary = 0;
4927 flags = 1;
4928 }
4929 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
4930 {
4931 summary = 0;
4932 id = 1;
4933 }
4934 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
4935 {
4936 summary = 0;
4937 mappings = 1;
4938 }
4939 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
4940 {
4941 summary = 0;
4942 signals = 1;
4943 }
4944 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
4945 {
4946 summary = 0;
4947 status = 1;
4948 }
4949 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
4950 {
4951 summary = 0;
4952 syscalls = 1;
4953 }
4954 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
4955 {
4956 summary = 0;
4957 times = 1;
4958 }
4959 else if ((pid = atoi (*argv)) > 0)
4960 {
4961 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4962 memset (pip, 0, sizeof (*pip));
4963
4964 pip->pid = pid;
4965 if (!open_proc_file (pid, pip, O_RDONLY, 0))
4966 {
4967 perror_with_name (pip->pathname);
4968 /* NOTREACHED */
4969 }
4970 pid = pip->pid;
4971 make_cleanup_close_proc_file (pip);
4972 }
4973 else if (**argv != '\000')
4974 {
4975 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
4976 }
4977 argv++;
4978 }
4979 }
4980
4981 /* If we don't have a valid open process at this point, then we have no
4982 inferior or didn't specify a specific pid. */
4983
4984 if (!pip)
4985 {
4986 error ("\
4987 No process. Start debugging a program or specify an explicit process ID.");
4988 }
4989
4990 if (!procfs_read_status (pip))
4991 {
4992 print_sys_errmsg (pip->pathname, errno);
4993 error ("procfs_read_status failed");
4994 }
4995
4996 #ifndef PROCFS_USE_READ_WRITE
4997 #ifdef PIOCLWPIDS
4998 nlwp = pip->prstatus.pr_nlwp;
4999 lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
5000
5001 if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
5002 {
5003 print_sys_errmsg (pip->pathname, errno);
5004 error ("PIOCLWPIDS failed");
5005 }
5006 #else /* PIOCLWPIDS */
5007 nlwp = 1;
5008 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
5009 lwps[0] = 0;
5010 #endif /* PIOCLWPIDS */
5011
5012 for (; nlwp > 0; nlwp--, lwps++)
5013 {
5014 pip = find_procinfo ((*lwps << 16) | pid, 1);
5015
5016 if (!pip)
5017 {
5018 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
5019 memset (pip, 0, sizeof (*pip));
5020 if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0))
5021 continue;
5022
5023 make_cleanup_close_proc_file (pip);
5024
5025 if (!procfs_read_status (pip))
5026 {
5027 print_sys_errmsg (pip->pathname, errno);
5028 error ("procfs_read_status failed");
5029 }
5030 }
5031
5032 #endif /* PROCFS_USE_READ_WRITE */
5033
5034 /* Print verbose information of the requested type(s), or just a summary
5035 of the information for all types. */
5036
5037 printf_filtered ("\nInformation for %s.%d:\n\n", pip->pathname, *lwps);
5038 if (summary || all || flags)
5039 {
5040 info_proc_flags (pip, summary);
5041 }
5042 if (summary || all)
5043 {
5044 info_proc_stop (pip, summary);
5045 #ifdef UNIXWARE
5046 supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
5047 #else
5048 supply_gregset (&pip->prstatus.pr_reg);
5049 #endif
5050 printf_filtered ("PC: ");
5051 print_address (read_pc (), gdb_stdout);
5052 printf_filtered ("\n");
5053 }
5054 if (summary || all || signals || faults)
5055 {
5056 info_proc_siginfo (pip, summary);
5057 }
5058 if (summary || all || syscalls)
5059 {
5060 info_proc_syscalls (pip, summary);
5061 }
5062 if (summary || all || mappings)
5063 {
5064 info_proc_mappings (pip, summary);
5065 }
5066 if (summary || all || signals)
5067 {
5068 info_proc_signals (pip, summary);
5069 }
5070 if (summary || all || faults)
5071 {
5072 info_proc_faults (pip, summary);
5073 }
5074 printf_filtered ("\n");
5075
5076 /* All done, deal with closing any temporary process info structure,
5077 freeing temporary memory , etc. */
5078
5079 do_cleanups (old_chain);
5080 #ifndef PROCFS_USE_READ_WRITE
5081 }
5082 #endif
5083 }
5084
5085 /*
5086
5087 LOCAL FUNCTION
5088
5089 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
5090
5091 SYNOPSIS
5092
5093 void modify_inherit_on_fork_flag (fd, flag)
5094
5095 DESCRIPTION
5096
5097 Call this routine to modify the inherit-on-fork flag. This routine is
5098 just a nice wrapper to hide the #ifdefs needed by various systems to
5099 control this flag.
5100
5101 */
5102
5103 static void
5104 modify_inherit_on_fork_flag (fd, flag)
5105 int fd;
5106 int flag;
5107 {
5108 #if defined (PIOCSET) || defined (PCSET)
5109 long pr_flags;
5110 #endif
5111 int retval = 0;
5112 struct proc_ctl pctl;
5113
5114 #if defined (PIOCSET) || defined (PCSET) /* New method */
5115 pr_flags = PR_FORK;
5116 if (flag)
5117 {
5118 #ifdef PROCFS_USE_READ_WRITE
5119 pctl.cmd = PCSET;
5120 pctl.data = PR_FORK;
5121 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5122 retval = -1;
5123 #else
5124 retval = ioctl (fd, PIOCSET, &pr_flags);
5125 #endif
5126 }
5127 else
5128 {
5129 #ifdef PROCFS_USE_READ_WRITE
5130 pctl.cmd = PCRESET;
5131 pctl.data = PR_FORK;
5132 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5133 retval = -1;
5134 #else
5135 retval = ioctl (fd, PIOCRESET, &pr_flags);
5136 #endif
5137 }
5138
5139 #else
5140 #ifdef PIOCSFORK /* Original method */
5141 if (flag)
5142 {
5143 retval = ioctl (fd, PIOCSFORK, NULL);
5144 }
5145 else
5146 {
5147 retval = ioctl (fd, PIOCRFORK, NULL);
5148 }
5149 #else
5150 Neither PR_FORK nor PIOCSFORK exist ! !!
5151 #endif
5152 #endif
5153
5154 if (!retval)
5155 return;
5156
5157 print_sys_errmsg ("modify_inherit_on_fork_flag", errno);
5158 error ("PIOCSFORK or PR_FORK modification failed");
5159 }
5160
5161 /*
5162
5163 LOCAL FUNCTION
5164
5165 modify_run_on_last_close_flag - Change the run-on-last-close flag
5166
5167 SYNOPSIS
5168
5169 void modify_run_on_last_close_flag (fd, flag)
5170
5171 DESCRIPTION
5172
5173 Call this routine to modify the run-on-last-close flag. This routine
5174 is just a nice wrapper to hide the #ifdefs needed by various systems to
5175 control this flag.
5176
5177 */
5178
5179 static void
5180 modify_run_on_last_close_flag (fd, flag)
5181 int fd;
5182 int flag;
5183 {
5184 #if defined (PIOCSET) || defined (PCSET)
5185 long pr_flags;
5186 #endif
5187 int retval = 0;
5188 struct proc_ctl pctl;
5189
5190 #if defined (PIOCSET) || defined (PCSET) /* New method */
5191 pr_flags = PR_RLC;
5192 if (flag)
5193 {
5194 #ifdef PROCFS_USE_READ_WRITE
5195 pctl.cmd = PCSET;
5196 pctl.data = PR_RLC;
5197 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5198 retval = -1;
5199 #else
5200 retval = ioctl (fd, PIOCSET, &pr_flags);
5201 #endif
5202 }
5203 else
5204 {
5205 #ifdef PROCFS_USE_READ_WRITE
5206 pctl.cmd = PCRESET;
5207 pctl.data = PR_RLC;
5208 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5209 retval = -1;
5210 #else
5211 retval = ioctl (fd, PIOCRESET, &pr_flags);
5212 #endif
5213 }
5214
5215 #else
5216 #ifdef PIOCSRLC /* Original method */
5217 if (flag)
5218 retval = ioctl (fd, PIOCSRLC, NULL);
5219 else
5220 retval = ioctl (fd, PIOCRRLC, NULL);
5221 #else
5222 Neither PR_RLC nor PIOCSRLC exist ! !!
5223 #endif
5224 #endif
5225
5226 if (!retval)
5227 return;
5228
5229 print_sys_errmsg ("modify_run_on_last_close_flag", errno);
5230 error ("PIOCSRLC or PR_RLC modification failed");
5231 }
5232
5233 /*
5234
5235 LOCAL FUNCTION
5236
5237 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5238
5239 SYNOPSIS
5240
5241 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5242
5243 DESCRIPTION
5244
5245 This function function disables traps for the specified system call.
5246 errok is non-zero if errors should be ignored.
5247 */
5248
5249 static void
5250 procfs_clear_syscall_trap (pi, syscall_num, errok)
5251 struct procinfo *pi;
5252 int syscall_num;
5253 int errok;
5254 {
5255 sysset_t sysset;
5256 int goterr, i;
5257
5258 #ifndef UNIXWARE
5259 goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
5260
5261 if (goterr && !errok)
5262 {
5263 print_sys_errmsg (pi->pathname, errno);
5264 error ("PIOCGENTRY failed");
5265 }
5266
5267 if (!goterr)
5268 {
5269 prdelset (&sysset, syscall_num);
5270
5271 if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok)
5272 {
5273 print_sys_errmsg (pi->pathname, errno);
5274 error ("PIOCSENTRY failed");
5275 }
5276 }
5277
5278 goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0;
5279
5280 if (goterr && !errok)
5281 {
5282 procfs_clear_syscall_trap (pi, syscall_num, 1);
5283 print_sys_errmsg (pi->pathname, errno);
5284 error ("PIOCGEXIT failed");
5285 }
5286
5287 if (!goterr)
5288 {
5289 praddset (&sysset, syscall_num);
5290
5291 if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok)
5292 {
5293 procfs_clear_syscall_trap (pi, syscall_num, 1);
5294 print_sys_errmsg (pi->pathname, errno);
5295 error ("PIOCSEXIT failed");
5296 }
5297 }
5298 #endif
5299
5300 if (!pi->syscall_handlers)
5301 {
5302 if (!errok)
5303 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5304 return;
5305 }
5306
5307 /* Remove handler func from the handler list */
5308
5309 for (i = 0; i < pi->num_syscall_handlers; i++)
5310 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5311 {
5312 if (i + 1 != pi->num_syscall_handlers)
5313 { /* Not the last entry.
5314 Move subsequent entries fwd. */
5315 memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1],
5316 (pi->num_syscall_handlers - i - 1)
5317 * sizeof (struct procfs_syscall_handler));
5318 }
5319
5320 pi->syscall_handlers = xrealloc (pi->syscall_handlers,
5321 (pi->num_syscall_handlers - 1)
5322 * sizeof (struct procfs_syscall_handler));
5323 pi->num_syscall_handlers--;
5324 return;
5325 }
5326
5327 if (!errok)
5328 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5329 syscall_num);
5330 }
5331
5332 /*
5333
5334 LOCAL FUNCTION
5335
5336 procfs_set_syscall_trap -- arrange for a function to be called when the
5337 child executes the specified system call.
5338
5339 SYNOPSIS
5340
5341 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5342 syscall_func_t *function)
5343
5344 DESCRIPTION
5345
5346 This function sets up an entry and/or exit trap for the specified system
5347 call. When the child executes the specified system call, your function
5348 will be called with the call #, a flag that indicates entry or exit, and
5349 pointers to rtnval and statval (which are used by procfs_wait). The
5350 function should return non-zero if something interesting happened, zero
5351 otherwise.
5352 */
5353
5354 static void
5355 procfs_set_syscall_trap (pi, syscall_num, flags, func)
5356 struct procinfo *pi;
5357 int syscall_num;
5358 int flags;
5359 syscall_func_t *func;
5360 {
5361 sysset_t sysset;
5362
5363 #ifndef UNIXWARE
5364 if (flags & PROCFS_SYSCALL_ENTRY)
5365 {
5366 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
5367 {
5368 print_sys_errmsg (pi->pathname, errno);
5369 error ("PIOCGENTRY failed");
5370 }
5371
5372 praddset (&sysset, syscall_num);
5373
5374 if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0)
5375 {
5376 print_sys_errmsg (pi->pathname, errno);
5377 error ("PIOCSENTRY failed");
5378 }
5379 }
5380
5381 if (flags & PROCFS_SYSCALL_EXIT)
5382 {
5383 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0)
5384 {
5385 procfs_clear_syscall_trap (pi, syscall_num, 1);
5386 print_sys_errmsg (pi->pathname, errno);
5387 error ("PIOCGEXIT failed");
5388 }
5389
5390 praddset (&sysset, syscall_num);
5391
5392 if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0)
5393 {
5394 procfs_clear_syscall_trap (pi, syscall_num, 1);
5395 print_sys_errmsg (pi->pathname, errno);
5396 error ("PIOCSEXIT failed");
5397 }
5398 }
5399 #endif
5400
5401 if (!pi->syscall_handlers)
5402 {
5403 pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler));
5404 pi->syscall_handlers[0].syscall_num = syscall_num;
5405 pi->syscall_handlers[0].func = func;
5406 pi->num_syscall_handlers = 1;
5407 }
5408 else
5409 {
5410 int i;
5411
5412 for (i = 0; i < pi->num_syscall_handlers; i++)
5413 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5414 {
5415 pi->syscall_handlers[i].func = func;
5416 return;
5417 }
5418
5419 pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1)
5420 * sizeof (struct procfs_syscall_handler));
5421 pi->syscall_handlers[i].syscall_num = syscall_num;
5422 pi->syscall_handlers[i].func = func;
5423 pi->num_syscall_handlers++;
5424 }
5425 }
5426
5427 #ifdef SYS_lwp_create
5428
5429 /*
5430
5431 LOCAL FUNCTION
5432
5433 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5434
5435 SYNOPSIS
5436
5437 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5438
5439 DESCRIPTION
5440
5441 This routine is called both when an inferior process and it's new lwp
5442 are about to finish a _lwp_create() system call. This is the system
5443 call that Solaris uses to create a lightweight process. When the
5444 target process gets this event, we can look at sysarg[2] to find the
5445 new childs lwp ID, and create a procinfo struct from that. After that,
5446 we pretend that we got a SIGTRAP, and return non-zero to tell
5447 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5448 sees the new process and continues it.
5449
5450 When we see the child exiting from lwp_create, we just contine it,
5451 since everything was handled when the parent trapped.
5452
5453 NOTES
5454 In effect, we are only paying attention to the parent's completion of
5455 the lwp_create syscall. If we only paid attention to the child
5456 instead, then we wouldn't detect the creation of a suspended thread.
5457 */
5458
5459 static int
5460 procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5461 struct procinfo *pi;
5462 int syscall_num;
5463 int why;
5464 int *rtnvalp;
5465 int *statvalp;
5466 {
5467 int lwp_id;
5468 struct procinfo *childpi;
5469 struct proc_ctl pctl;
5470
5471 /* We've just detected the completion of an lwp_create system call. Now we
5472 need to setup a procinfo struct for this thread, and notify the thread
5473 system of the new arrival. */
5474
5475 /* If lwp_create failed, then nothing interesting happened. Continue the
5476 process and go back to sleep. */
5477
5478 #ifdef UNIXWARE
5479 /* Joel ... can you check this logic out please? JKJ */
5480 if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1)
5481 { /* _lwp_create failed */
5482 pctl.cmd = PCRUN;
5483 pctl.data = PRCFAULT;
5484
5485 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5486 perror_with_name (pi->pathname);
5487
5488 return 0;
5489 }
5490 #else /* UNIXWARE */
5491 if (PROCFS_GET_CARRY (pi->prstatus.pr_reg))
5492 { /* _lwp_create failed */
5493 pi->prrun.pr_flags &= PRSTEP;
5494 pi->prrun.pr_flags |= PRCFAULT;
5495
5496 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5497 perror_with_name (pi->pathname);
5498
5499 return 0;
5500 }
5501 #endif
5502
5503 /* At this point, the new thread is stopped at it's first instruction, and
5504 the parent is stopped at the exit from lwp_create. */
5505
5506 if (pi->new_child) /* Child? */
5507 { /* Yes, just continue it */
5508 #ifdef UNIXWARE
5509 pctl.cmd = PCRUN;
5510 pctl.data = PRCFAULT;
5511
5512 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5513 #else /* !UNIXWARE */
5514 pi->prrun.pr_flags &= PRSTEP;
5515 pi->prrun.pr_flags |= PRCFAULT;
5516
5517 if ((pi->prstatus.pr_flags & PR_ISTOP)
5518 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5519 #endif /* !UNIXWARE */
5520 perror_with_name (pi->pathname);
5521
5522 pi->new_child = 0; /* No longer new */
5523
5524 return 0;
5525 }
5526
5527 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5528 in the child and continue the parent. */
5529
5530 /* Third arg is pointer to new thread id. */
5531 lwp_id = read_memory_integer (
5532 THE_PR_LWP (pi->prstatus).pr_sysarg[2], sizeof (int));
5533
5534 lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
5535
5536 childpi = create_procinfo (lwp_id);
5537
5538 /* The new process has actually inherited the lwp_create syscall trap from
5539 it's parent, but we still have to call this to register handlers for
5540 that child. */
5541
5542 procfs_set_inferior_syscall_traps (childpi);
5543 add_thread (lwp_id);
5544 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
5545
5546 /* Continue the parent */
5547 #ifdef UNIXWARE
5548 pctl.cmd = PCRUN;
5549 pctl.data = PRCFAULT;
5550
5551 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5552 #else
5553 pi->prrun.pr_flags &= PRSTEP;
5554 pi->prrun.pr_flags |= PRCFAULT;
5555 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5556 #endif
5557 perror_with_name (pi->pathname);
5558
5559 /* The new child may have been created in one of two states:
5560 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5561 If suspended, we flag it to be continued later, when it has an event. */
5562
5563 if (THE_PR_LWP (childpi->prstatus).pr_why == PR_SUSPENDED)
5564 childpi->new_child = 1; /* Flag this as an unseen child process */
5565 else
5566 {
5567 /* Continue the child */
5568 #ifdef UNIXWARE
5569 pctl.cmd = PCRUN;
5570 pctl.data = PRCFAULT;
5571
5572 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5573 #else
5574 childpi->prrun.pr_flags &= PRSTEP;
5575 childpi->prrun.pr_flags |= PRCFAULT;
5576
5577 if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
5578 #endif
5579 perror_with_name (childpi->pathname);
5580 }
5581 return 0;
5582 }
5583 #endif /* SYS_lwp_create */
5584
5585 /* Fork an inferior process, and start debugging it with /proc. */
5586
5587 static void
5588 procfs_create_inferior (exec_file, allargs, env)
5589 char *exec_file;
5590 char *allargs;
5591 char **env;
5592 {
5593 char *shell_file = getenv ("SHELL");
5594 char *tryname;
5595 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
5596 {
5597
5598 /* We will be looking down the PATH to find shell_file. If we
5599 just do this the normal way (via execlp, which operates by
5600 attempting an exec for each element of the PATH until it
5601 finds one which succeeds), then there will be an exec for
5602 each failed attempt, each of which will cause a PR_SYSEXIT
5603 stop, and we won't know how to distinguish the PR_SYSEXIT's
5604 for these failed execs with the ones for successful execs
5605 (whether the exec has succeeded is stored at that time in the
5606 carry bit or some such architecture-specific and
5607 non-ABI-specified place).
5608
5609 So I can't think of anything better than to search the PATH
5610 now. This has several disadvantages: (1) There is a race
5611 condition; if we find a file now and it is deleted before we
5612 exec it, we lose, even if the deletion leaves a valid file
5613 further down in the PATH, (2) there is no way to know exactly
5614 what an executable (in the sense of "capable of being
5615 exec'd") file is. Using access() loses because it may lose
5616 if the caller is the superuser; failing to use it loses if
5617 there are ACLs or some such. */
5618
5619 char *p;
5620 char *p1;
5621 /* FIXME-maybe: might want "set path" command so user can change what
5622 path is used from within GDB. */
5623 char *path = getenv ("PATH");
5624 int len;
5625 struct stat statbuf;
5626
5627 if (path == NULL)
5628 path = "/bin:/usr/bin";
5629
5630 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
5631 for (p = path; p != NULL; p = p1 ? p1 + 1 : NULL)
5632 {
5633 p1 = strchr (p, ':');
5634 if (p1 != NULL)
5635 len = p1 - p;
5636 else
5637 len = strlen (p);
5638 strncpy (tryname, p, len);
5639 tryname[len] = '\0';
5640 strcat (tryname, "/");
5641 strcat (tryname, shell_file);
5642 if (access (tryname, X_OK) < 0)
5643 continue;
5644 if (stat (tryname, &statbuf) < 0)
5645 continue;
5646 if (!S_ISREG (statbuf.st_mode))
5647 /* We certainly need to reject directories. I'm not quite
5648 as sure about FIFOs, sockets, etc., but I kind of doubt
5649 that people want to exec() these things. */
5650 continue;
5651 break;
5652 }
5653 if (p == NULL)
5654 /* Not found. This must be an error rather than merely passing
5655 the file to execlp(), because execlp() would try all the
5656 exec()s, causing GDB to get confused. */
5657 error ("Can't find shell %s in PATH", shell_file);
5658
5659 shell_file = tryname;
5660 }
5661
5662 fork_inferior (exec_file, allargs, env,
5663 proc_set_exec_trap, procfs_init_inferior, NULL, shell_file);
5664
5665 /* We are at the first instruction we care about. */
5666 /* Pedal to the metal... */
5667
5668 proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0);
5669 }
5670
5671 /* Clean up after the inferior dies. */
5672
5673 static void
5674 procfs_mourn_inferior ()
5675 {
5676 struct procinfo *pi;
5677 struct procinfo *next_pi;
5678
5679 for (pi = procinfo_list; pi; pi = next_pi)
5680 {
5681 next_pi = pi->next;
5682 unconditionally_kill_inferior (pi);
5683 }
5684
5685 unpush_target (&procfs_ops);
5686 generic_mourn_inferior ();
5687 }
5688
5689
5690 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5691 static int
5692 procfs_can_run ()
5693 {
5694 /* This variable is controlled by modules that sit atop procfs that may layer
5695 their own process structure atop that provided here. sol-thread.c does
5696 this because of the Solaris two-level thread model. */
5697
5698 return !procfs_suppress_run;
5699 }
5700 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5701 #ifndef UNIXWARE
5702 \f
5703 /* Insert a watchpoint */
5704 int
5705 procfs_set_watchpoint (pid, addr, len, rw)
5706 int pid;
5707 CORE_ADDR addr;
5708 int len;
5709 int rw;
5710 {
5711 struct procinfo *pi;
5712 prwatch_t wpt;
5713
5714 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5715 wpt.pr_vaddr = (caddr_t) addr;
5716 wpt.pr_size = len;
5717 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
5718 if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0)
5719 {
5720 if (errno == E2BIG)
5721 return -1;
5722 /* Currently it sometimes happens that the same watchpoint gets
5723 deleted twice - don't die in this case (FIXME please) */
5724 if (errno == ESRCH && len == 0)
5725 return 0;
5726 print_sys_errmsg (pi->pathname, errno);
5727 error ("PIOCSWATCH failed");
5728 }
5729 return 0;
5730 }
5731
5732 int
5733 procfs_stopped_by_watchpoint (pid)
5734 int pid;
5735 {
5736 struct procinfo *pi;
5737 short what;
5738 short why;
5739
5740 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5741 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
5742 {
5743 why = pi->prstatus.pr_why;
5744 what = pi->prstatus.pr_what;
5745 if (why == PR_FAULTED
5746 #if defined (FLTWATCH) && defined (FLTKWATCH)
5747 && (what == FLTWATCH || what == FLTKWATCH)
5748 #else
5749 #ifdef FLTWATCH
5750 && (what == FLTWATCH)
5751 #endif
5752 #ifdef FLTKWATCH
5753 && (what == FLTKWATCH)
5754 #endif
5755 #endif
5756 )
5757 return what;
5758 }
5759 return 0;
5760 }
5761 #endif /* !UNIXWARE */
5762 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5763
5764 /* Why is this necessary? Shouldn't dead threads just be removed from the
5765 thread database? */
5766
5767 static int
5768 procfs_thread_alive (pid)
5769 int pid;
5770 {
5771 struct procinfo *pi, *next_pi;
5772
5773 for (pi = procinfo_list; pi; pi = next_pi)
5774 {
5775 next_pi = pi->next;
5776 if (pi->pid == pid)
5777 if (procfs_read_status (pi)) /* alive */
5778 return 1;
5779 else
5780 /* defunct (exited) */
5781 {
5782 close_proc_file (pi);
5783 return 0;
5784 }
5785 }
5786 return 0;
5787 }
5788
5789 int
5790 procfs_first_available ()
5791 {
5792 struct procinfo *pi;
5793
5794 for (pi = procinfo_list; pi; pi = pi->next)
5795 {
5796 if (procfs_read_status (pi))
5797 return pi->pid;
5798 }
5799 return -1;
5800 }
5801
5802 int
5803 procfs_get_pid_fd (pid)
5804 int pid;
5805 {
5806 struct procinfo *pi = find_procinfo (pid, 1);
5807
5808 if (pi == NULL)
5809 return -1;
5810
5811 return pi->ctl_fd;
5812 }
5813
5814 /* Send a SIGINT to the process group. This acts just like the user typed a
5815 ^C on the controlling terminal.
5816
5817 XXX - This may not be correct for all systems. Some may want to use
5818 killpg() instead of kill (-pgrp). */
5819
5820 static void
5821 procfs_stop ()
5822 {
5823 extern pid_t inferior_process_group;
5824
5825 kill (-inferior_process_group, SIGINT);
5826 }
5827 \f
5828 /* Convert a pid to printable form. */
5829
5830 #ifdef TIDGET
5831 char *
5832 procfs_pid_to_str (pid)
5833 int pid;
5834 {
5835 static char buf[100];
5836
5837 sprintf (buf, "Kernel thread %d", TIDGET (pid));
5838
5839 return buf;
5840 }
5841 #endif /* TIDGET */
5842 \f
5843
5844 static void
5845 init_procfs_ops ()
5846 {
5847 procfs_ops.to_shortname = "procfs";
5848 procfs_ops.to_longname = "Unix /proc child process";
5849 procfs_ops.to_doc = "Unix /proc child process (started by the \"run\" command).";
5850 procfs_ops.to_open = procfs_open;
5851 procfs_ops.to_attach = procfs_attach;
5852 procfs_ops.to_detach = procfs_detach;
5853 procfs_ops.to_resume = procfs_resume;
5854 procfs_ops.to_wait = procfs_wait;
5855 procfs_ops.to_fetch_registers = procfs_fetch_registers;
5856 procfs_ops.to_store_registers = procfs_store_registers;
5857 procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
5858 procfs_ops.to_xfer_memory = procfs_xfer_memory;
5859 procfs_ops.to_files_info = procfs_files_info;
5860 procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
5861 procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
5862 procfs_ops.to_terminal_init = terminal_init_inferior;
5863 procfs_ops.to_terminal_inferior = terminal_inferior;
5864 procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output;
5865 procfs_ops.to_terminal_ours = terminal_ours;
5866 procfs_ops.to_terminal_info = child_terminal_info;
5867 procfs_ops.to_kill = procfs_kill_inferior;
5868 procfs_ops.to_create_inferior = procfs_create_inferior;
5869 procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
5870 procfs_ops.to_can_run = procfs_can_run;
5871 procfs_ops.to_notice_signals = procfs_notice_signals;
5872 procfs_ops.to_thread_alive = procfs_thread_alive;
5873 procfs_ops.to_stop = procfs_stop;
5874 procfs_ops.to_stratum = process_stratum;
5875 procfs_ops.to_has_all_memory = 1;
5876 procfs_ops.to_has_memory = 1;
5877 procfs_ops.to_has_stack = 1;
5878 procfs_ops.to_has_registers = 1;
5879 procfs_ops.to_has_execution = 1;
5880 procfs_ops.to_magic = OPS_MAGIC;
5881 }
5882
5883 void
5884 _initialize_procfs ()
5885 {
5886 #ifdef HAVE_OPTIONAL_PROC_FS
5887 char procname[MAX_PROC_NAME_SIZE];
5888 int fd;
5889
5890 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5891 don't add procfs support if we cannot access the running
5892 GDB via /proc. */
5893 sprintf (procname, STATUS_PROC_NAME_FMT, getpid ());
5894 if ((fd = open (procname, O_RDONLY)) < 0)
5895 return;
5896 close (fd);
5897 #endif
5898
5899 init_procfs_ops ();
5900 add_target (&procfs_ops);
5901
5902 add_info ("processes", info_proc,
5903 "Show process status information using /proc entry.\n\
5904 Specify process id or use current inferior by default.\n\
5905 Specify keywords for detailed information; default is summary.\n\
5906 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5907 `status', `syscalls', and `times'.\n\
5908 Unambiguous abbreviations may be used.");
5909
5910 init_syscall_table ();
5911 }
A mirror of the official binutils-gdb repository