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Wed Nov 11 15:47:00 1998 Michael Snyder <msnyder@cleaver.cygnus.com>
[binutils-gdb.git] / gdb / procfs.c
1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992-97, 1998 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, Boston, MA 02111-1307, USA. */
21
22
23 /* N O T E S
24
25 For information on the details of using /proc consult section proc(4)
26 in the UNIX System V Release 4 System Administrator's Reference Manual.
27
28 The general register and floating point register sets are manipulated
29 separately. This file makes the assumption that if FP0_REGNUM is
30 defined, then support for the floating point register set is desired,
31 regardless of whether or not the actual target has floating point hardware.
32
33 */
34
35
36 #include "defs.h"
37
38 #include <sys/types.h>
39 #include <time.h>
40 #include <sys/fault.h>
41 #include <sys/syscall.h>
42 #include <sys/procfs.h>
43 #include <fcntl.h>
44 #include <errno.h>
45 #include "gdb_string.h"
46 #include <stropts.h>
47 #include <poll.h>
48 #include <unistd.h>
49 #include "gdb_stat.h"
50
51 #include "inferior.h"
52 #include "target.h"
53 #include "command.h"
54 #include "gdbcore.h"
55 #include "gdbthread.h"
56
57 #if !defined(SYS_lwp_create) && defined(SYS_lwpcreate)
58 # define SYS_lwp_create SYS_lwpcreate
59 #endif
60
61 #if !defined(SYS_lwp_exit) && defined(SYS_lwpexit)
62 # define SYS_lwp_exit SYS_lwpexit
63 #endif
64
65 #if !defined(SYS_lwp_wait) && defined(SYS_lwpwait)
66 # define SYS_lwp_wait SYS_lwpwait
67 #endif
68
69 #if !defined(SYS_lwp_self) && defined(SYS_lwpself)
70 # define SYS_lwp_self SYS_lwpself
71 #endif
72
73 #if !defined(SYS_lwp_info) && defined(SYS_lwpinfo)
74 # define SYS_lwp_info SYS_lwpinfo
75 #endif
76
77 #if !defined(SYS_lwp_private) && defined(SYS_lwpprivate)
78 # define SYS_lwp_private SYS_lwpprivate
79 #endif
80
81 #if !defined(SYS_lwp_kill) && defined(SYS_lwpkill)
82 # define SYS_lwp_kill SYS_lwpkill
83 #endif
84
85 #if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend)
86 # define SYS_lwp_suspend SYS_lwpsuspend
87 #endif
88
89 #if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue)
90 # define SYS_lwp_continue SYS_lwpcontinue
91 #endif
92
93 /* the name of the proc status struct depends on the implementation */
94 #ifdef HAVE_PSTATUS_T
95 typedef pstatus_t gdb_prstatus_t;
96 #else
97 typedef prstatus_t gdb_prstatus_t;
98 #endif
99
100 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
101
102 /* proc name formats may vary depending on the proc implementation */
103 #ifdef HAVE_MULTIPLE_PROC_FDS
104 # ifndef CTL_PROC_NAME_FMT
105 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
106 # define AS_PROC_NAME_FMT "/proc/%d/as"
107 # define MAP_PROC_NAME_FMT "/proc/%d/map"
108 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
109 # endif
110 #else /* HAVE_MULTIPLE_PROC_FDS */
111 # ifndef CTL_PROC_NAME_FMT
112 # define CTL_PROC_NAME_FMT "/proc/%05d"
113 # define AS_PROC_NAME_FMT "/proc/%05d"
114 # define MAP_PROC_NAME_FMT "/proc/%05d"
115 # define STATUS_PROC_NAME_FMT "/proc/%05d"
116 # endif
117 #endif /* HAVE_MULTIPLE_PROC_FDS */
118
119 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
120
121 extern struct target_ops procfs_ops; /* Forward declaration */
122
123 int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
124 be a runnable target. Used by targets
125 that can sit atop procfs, such as solaris
126 thread support. */
127
128 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
129 CORE_ADDR kernel_u_addr;
130 #endif
131
132 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
133 #undef si_pid
134 #define si_pid _data._proc.pid
135 #undef si_uid
136 #define si_uid _data._proc._pdata._kill.uid
137 #endif /* BROKEN_SIGINFO_H */
138
139 /* Define structures for passing commands to /proc/pid/ctl file. Note that
140 while we create these for the PROCFS_USE_READ_WRITE world, we use them
141 and ignore the extra cmd int in other proc schemes.
142 */
143 /* generic ctl msg */
144 struct proc_ctl {
145 int cmd;
146 long data;
147 };
148
149 /* set general registers */
150 struct greg_ctl {
151 int cmd;
152 gregset_t gregset;
153 };
154
155 /* set fp registers */
156 struct fpreg_ctl {
157 int cmd;
158 fpregset_t fpregset;
159 };
160
161 /* set signals to be traced */
162 struct sig_ctl {
163 int cmd;
164 sigset_t sigset;
165 };
166
167 /* set faults to be traced */
168 struct flt_ctl {
169 int cmd;
170 fltset_t fltset;
171 };
172
173 /* set system calls to be traced */
174 struct sys_ctl {
175 int cmd;
176 sysset_t sysset;
177 };
178
179 /* set current signal to be traced */
180 struct sigi_ctl {
181 int cmd;
182 siginfo_t siginfo;
183 };
184
185 /* All access to the inferior, either one started by gdb or one that has
186 been attached to, is controlled by an instance of a procinfo structure,
187 defined below. Since gdb currently only handles one inferior at a time,
188 the procinfo structure for the inferior is statically allocated and
189 only one exists at any given time. There is a separate procinfo
190 structure for use by the "info proc" command, so that we can print
191 useful information about any random process without interfering with
192 the inferior's procinfo information. */
193
194 struct procinfo {
195 struct procinfo *next;
196 int pid; /* Process ID of inferior */
197 int ctl_fd; /* File descriptor for /proc ctl file */
198 int status_fd; /* File descriptor for /proc status file */
199 int as_fd; /* File descriptor for /proc as file */
200 int map_fd; /* File descriptor for /proc map file */
201 char *pathname; /* Pathname to /proc entry */
202 int had_event; /* poll/select says something happened */
203 int was_stopped; /* Nonzero if was stopped prior to attach */
204 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
205 #ifndef HAVE_NO_PRRUN_T
206 prrun_t prrun; /* Control state when it is run */
207 #endif
208 gdb_prstatus_t prstatus; /* Current process status info */
209 struct greg_ctl gregset; /* General register set */
210 struct fpreg_ctl fpregset; /* Floating point register set */
211 struct flt_ctl fltset; /* Current traced hardware fault set */
212 struct sig_ctl trace; /* Current traced signal set */
213 struct sys_ctl exitset; /* Current traced system call exit set */
214 struct sys_ctl entryset; /* Current traced system call entry set */
215 struct sig_ctl saved_sighold; /* Saved held signal set */
216 struct flt_ctl saved_fltset; /* Saved traced hardware fault set */
217 struct sig_ctl saved_trace; /* Saved traced signal set */
218 struct sys_ctl saved_exitset; /* Saved traced system call exit set */
219 struct sys_ctl saved_entryset;/* Saved traced system call entry set */
220 int num_syscall_handlers; /* Number of syscall trap handlers
221 currently installed */
222 /* Pointer to list of syscall trap handlers */
223 struct procfs_syscall_handler *syscall_handlers;
224 int new_child; /* Non-zero if it's a new thread */
225 };
226
227 /* List of inferior process information */
228 static struct procinfo *procinfo_list = NULL;
229 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
230
231 static int num_poll_list = 0; /* Number of entries in poll_list */
232
233 /* Much of the information used in the /proc interface, particularly for
234 printing status information, is kept as tables of structures of the
235 following form. These tables can be used to map numeric values to
236 their symbolic names and to a string that describes their specific use. */
237
238 struct trans {
239 int value; /* The numeric value */
240 char *name; /* The equivalent symbolic value */
241 char *desc; /* Short description of value */
242 };
243
244 /* Translate bits in the pr_flags member of the prstatus structure, into the
245 names and desc information. */
246
247 static struct trans pr_flag_table[] =
248 {
249 #if defined (PR_STOPPED)
250 { PR_STOPPED, "PR_STOPPED", "Process is stopped" },
251 #endif
252 #if defined (PR_ISTOP)
253 { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" },
254 #endif
255 #if defined (PR_DSTOP)
256 { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" },
257 #endif
258 #if defined (PR_ASLEEP)
259 { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" },
260 #endif
261 #if defined (PR_FORK)
262 { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" },
263 #endif
264 #if defined (PR_RLC)
265 { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" },
266 #endif
267 #if defined (PR_PTRACE)
268 { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" },
269 #endif
270 #if defined (PR_PCINVAL)
271 { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" },
272 #endif
273 #if defined (PR_ISSYS)
274 { PR_ISSYS, "PR_ISSYS", "Is a system process" },
275 #endif
276 #if defined (PR_STEP)
277 { PR_STEP, "PR_STEP", "Process has single step pending" },
278 #endif
279 #if defined (PR_KLC)
280 { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" },
281 #endif
282 #if defined (PR_ASYNC)
283 { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" },
284 #endif
285 #if defined (PR_PCOMPAT)
286 { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
287 #endif
288 #if defined (PR_MSACCT)
289 { PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled" },
290 #endif
291 #if defined (PR_BPTADJ)
292 { PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect" },
293 #endif
294 #if defined (PR_ASLWP)
295 { PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP" },
296 #endif
297 { 0, NULL, NULL }
298 };
299
300 /* Translate values in the pr_why field of the prstatus struct. */
301
302 static struct trans pr_why_table[] =
303 {
304 #if defined (PR_REQUESTED)
305 { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
306 #endif
307 #if defined (PR_SIGNALLED)
308 { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
309 #endif
310 #if defined (PR_SYSENTRY)
311 { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
312 #endif
313 #if defined (PR_SYSEXIT)
314 { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
315 #endif
316 #if defined (PR_JOBCONTROL)
317 { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
318 #endif
319 #if defined (PR_FAULTED)
320 { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
321 #endif
322 #if defined (PR_SUSPENDED)
323 { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
324 #endif
325 #if defined (PR_CHECKPOINT)
326 { PR_CHECKPOINT, "PR_CHECKPOINT", "(???)" },
327 #endif
328 { 0, NULL, NULL }
329 };
330
331 /* Hardware fault translation table. */
332
333 static struct trans faults_table[] =
334 {
335 #if defined (FLTILL)
336 { FLTILL, "FLTILL", "Illegal instruction" },
337 #endif
338 #if defined (FLTPRIV)
339 { FLTPRIV, "FLTPRIV", "Privileged instruction" },
340 #endif
341 #if defined (FLTBPT)
342 { FLTBPT, "FLTBPT", "Breakpoint trap" },
343 #endif
344 #if defined (FLTTRACE)
345 { FLTTRACE, "FLTTRACE", "Trace trap" },
346 #endif
347 #if defined (FLTACCESS)
348 { FLTACCESS, "FLTACCESS", "Memory access fault" },
349 #endif
350 #if defined (FLTBOUNDS)
351 { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" },
352 #endif
353 #if defined (FLTIOVF)
354 { FLTIOVF, "FLTIOVF", "Integer overflow" },
355 #endif
356 #if defined (FLTIZDIV)
357 { FLTIZDIV, "FLTIZDIV", "Integer zero divide" },
358 #endif
359 #if defined (FLTFPE)
360 { FLTFPE, "FLTFPE", "Floating-point exception" },
361 #endif
362 #if defined (FLTSTACK)
363 { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" },
364 #endif
365 #if defined (FLTPAGE)
366 { FLTPAGE, "FLTPAGE", "Recoverable page fault" },
367 #endif
368 { 0, NULL, NULL }
369 };
370
371 /* Translation table for signal generation information. See UNIX System
372 V Release 4 Programmer's Reference Manual, siginfo(5). */
373
374 static struct sigcode {
375 int signo;
376 int code;
377 char *codename;
378 char *desc;
379 } siginfo_table[] = {
380 #if defined (SIGILL) && defined (ILL_ILLOPC)
381 { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" },
382 #endif
383 #if defined (SIGILL) && defined (ILL_ILLOPN)
384 { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", },
385 #endif
386 #if defined (SIGILL) && defined (ILL_ILLADR)
387 { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" },
388 #endif
389 #if defined (SIGILL) && defined (ILL_ILLTRP)
390 { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" },
391 #endif
392 #if defined (SIGILL) && defined (ILL_PRVOPC)
393 { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" },
394 #endif
395 #if defined (SIGILL) && defined (ILL_PRVREG)
396 { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" },
397 #endif
398 #if defined (SIGILL) && defined (ILL_COPROC)
399 { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" },
400 #endif
401 #if defined (SIGILL) && defined (ILL_BADSTK)
402 { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" },
403 #endif
404 #if defined (SIGFPE) && defined (FPE_INTDIV)
405 { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" },
406 #endif
407 #if defined (SIGFPE) && defined (FPE_INTOVF)
408 { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" },
409 #endif
410 #if defined (SIGFPE) && defined (FPE_FLTDIV)
411 { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" },
412 #endif
413 #if defined (SIGFPE) && defined (FPE_FLTOVF)
414 { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" },
415 #endif
416 #if defined (SIGFPE) && defined (FPE_FLTUND)
417 { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" },
418 #endif
419 #if defined (SIGFPE) && defined (FPE_FLTRES)
420 { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" },
421 #endif
422 #if defined (SIGFPE) && defined (FPE_FLTINV)
423 { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" },
424 #endif
425 #if defined (SIGFPE) && defined (FPE_FLTSUB)
426 { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" },
427 #endif
428 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
429 { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" },
430 #endif
431 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
432 { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" },
433 #endif
434 #if defined (SIGBUS) && defined (BUS_ADRALN)
435 { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" },
436 #endif
437 #if defined (SIGBUS) && defined (BUS_ADRERR)
438 { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" },
439 #endif
440 #if defined (SIGBUS) && defined (BUS_OBJERR)
441 { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" },
442 #endif
443 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
444 { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" },
445 #endif
446 #if defined (SIGTRAP) && defined (TRAP_TRACE)
447 { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" },
448 #endif
449 #if defined (SIGCLD) && defined (CLD_EXITED)
450 { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" },
451 #endif
452 #if defined (SIGCLD) && defined (CLD_KILLED)
453 { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" },
454 #endif
455 #if defined (SIGCLD) && defined (CLD_DUMPED)
456 { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" },
457 #endif
458 #if defined (SIGCLD) && defined (CLD_TRAPPED)
459 { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" },
460 #endif
461 #if defined (SIGCLD) && defined (CLD_STOPPED)
462 { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" },
463 #endif
464 #if defined (SIGCLD) && defined (CLD_CONTINUED)
465 { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" },
466 #endif
467 #if defined (SIGPOLL) && defined (POLL_IN)
468 { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" },
469 #endif
470 #if defined (SIGPOLL) && defined (POLL_OUT)
471 { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" },
472 #endif
473 #if defined (SIGPOLL) && defined (POLL_MSG)
474 { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" },
475 #endif
476 #if defined (SIGPOLL) && defined (POLL_ERR)
477 { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" },
478 #endif
479 #if defined (SIGPOLL) && defined (POLL_PRI)
480 { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" },
481 #endif
482 #if defined (SIGPOLL) && defined (POLL_HUP)
483 { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" },
484 #endif
485 { 0, 0, NULL, NULL }
486 };
487
488 static char *syscall_table[MAX_SYSCALLS];
489
490 /* Prototypes for local functions */
491
492 static void procfs_stop PARAMS ((void));
493
494 static int procfs_thread_alive PARAMS ((int));
495
496 static int procfs_can_run PARAMS ((void));
497
498 static void procfs_mourn_inferior PARAMS ((void));
499
500 static void procfs_fetch_registers PARAMS ((int));
501
502 static int procfs_wait PARAMS ((int, struct target_waitstatus *));
503
504 static void procfs_open PARAMS ((char *, int));
505
506 static void procfs_files_info PARAMS ((struct target_ops *));
507
508 static void procfs_prepare_to_store PARAMS ((void));
509
510 static void procfs_detach PARAMS ((char *, int));
511
512 static void procfs_attach PARAMS ((char *, int));
513
514 static void proc_set_exec_trap PARAMS ((void));
515
516 static int procfs_init_inferior PARAMS ((int));
517
518 static struct procinfo *create_procinfo PARAMS ((int));
519
520 static void procfs_store_registers PARAMS ((int));
521
522 static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
523
524 static void procfs_kill_inferior PARAMS ((void));
525
526 static char *sigcodedesc PARAMS ((siginfo_t *));
527
528 static char *sigcodename PARAMS ((siginfo_t *));
529
530 static struct procinfo *wait_fd PARAMS ((void));
531
532 static void remove_fd PARAMS ((struct procinfo *));
533
534 static void add_fd PARAMS ((struct procinfo *));
535
536 static void set_proc_siginfo PARAMS ((struct procinfo *, int));
537
538 static void init_syscall_table PARAMS ((void));
539
540 static char *syscallname PARAMS ((int));
541
542 static char *signalname PARAMS ((int));
543
544 static char *errnoname PARAMS ((int));
545
546 static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
547
548 static int open_proc_file PARAMS ((int, struct procinfo *, int, int));
549
550 static void close_proc_file PARAMS ((struct procinfo *));
551
552 static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
553
554 static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN;
555
556 static void info_proc PARAMS ((char *, int));
557
558 static void info_proc_flags PARAMS ((struct procinfo *, int));
559
560 static void info_proc_stop PARAMS ((struct procinfo *, int));
561
562 static void info_proc_siginfo PARAMS ((struct procinfo *, int));
563
564 static void info_proc_syscalls PARAMS ((struct procinfo *, int));
565
566 static void info_proc_mappings PARAMS ((struct procinfo *, int));
567
568 static void info_proc_signals PARAMS ((struct procinfo *, int));
569
570 static void info_proc_faults PARAMS ((struct procinfo *, int));
571
572 static char *mappingflags PARAMS ((long));
573
574 static char *lookupname PARAMS ((struct trans *, unsigned int, char *));
575
576 static char *lookupdesc PARAMS ((struct trans *, unsigned int));
577
578 static int do_attach PARAMS ((int pid));
579
580 static void do_detach PARAMS ((int siggnal));
581
582 static void procfs_create_inferior PARAMS ((char *, char *, char **));
583
584 static void procfs_notice_signals PARAMS ((int pid));
585
586 static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *));
587
588 static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
589
590 static int procfs_write_pcwstop PARAMS ((struct procinfo *));
591 static int procfs_read_status PARAMS ((struct procinfo *));
592 static void procfs_write_pckill PARAMS ((struct procinfo *));
593
594 typedef int syscall_func_t PARAMS ((struct procinfo *pi, int syscall_num,
595 int why, int *rtnval, int *statval));
596
597 static void procfs_set_syscall_trap PARAMS ((struct procinfo *pi,
598 int syscall_num, int flags,
599 syscall_func_t *func));
600
601 static void procfs_clear_syscall_trap PARAMS ((struct procinfo *pi,
602 int syscall_num, int errok));
603
604 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
605 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
606
607 static syscall_func_t procfs_exit_handler;
608
609 static syscall_func_t procfs_exec_handler;
610
611 #ifdef SYS_sproc
612 static syscall_func_t procfs_sproc_handler;
613 static syscall_func_t procfs_fork_handler;
614 #endif
615
616 #ifdef SYS_lwp_create
617 static syscall_func_t procfs_lwp_creation_handler;
618 #endif
619
620 static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag));
621 static void modify_run_on_last_close_flag PARAMS ((int fd, int flag));
622
623 /* */
624
625 struct procfs_syscall_handler
626 {
627 int syscall_num; /* The number of the system call being handled */
628 /* The function to be called */
629 syscall_func_t *func;
630 };
631
632 static void procfs_resume PARAMS ((int pid, int step,
633 enum target_signal signo));
634
635 /* External function prototypes that can't be easily included in any
636 header file because the args are typedefs in system include files. */
637
638 extern void supply_gregset PARAMS ((gregset_t *));
639
640 extern void fill_gregset PARAMS ((gregset_t *, int));
641
642 #ifdef FP0_REGNUM
643 extern void supply_fpregset PARAMS ((fpregset_t *));
644
645 extern void fill_fpregset PARAMS ((fpregset_t *, int));
646 #endif
647
648 /*
649
650 LOCAL FUNCTION
651
652 find_procinfo -- convert a process id to a struct procinfo
653
654 SYNOPSIS
655
656 static struct procinfo * find_procinfo (pid_t pid, int okfail);
657
658 DESCRIPTION
659
660 Given a process id, look it up in the procinfo chain. Returns
661 a struct procinfo *. If can't find pid, then call error(),
662 unless okfail is set, in which case, return NULL;
663 */
664
665 static struct procinfo *
666 find_procinfo (pid, okfail)
667 pid_t pid;
668 int okfail;
669 {
670 struct procinfo *procinfo;
671
672 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
673 if (procinfo->pid == pid)
674 return procinfo;
675
676 if (okfail)
677 return NULL;
678
679 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
680 }
681
682 /*
683
684 LOCAL MACRO
685
686 current_procinfo -- convert inferior_pid to a struct procinfo
687
688 SYNOPSIS
689
690 static struct procinfo * current_procinfo;
691
692 DESCRIPTION
693
694 Looks up inferior_pid in the procinfo chain. Always returns a
695 struct procinfo *. If process can't be found, we error() out.
696 */
697
698 #define current_procinfo find_procinfo (inferior_pid, 0)
699
700 /*
701
702 LOCAL FUNCTION
703
704 add_fd -- Add the fd to the poll/select list
705
706 SYNOPSIS
707
708 static void add_fd (struct procinfo *);
709
710 DESCRIPTION
711
712 Add the fd of the supplied procinfo to the list of fds used for
713 poll/select operations.
714 */
715
716 static void
717 add_fd (pi)
718 struct procinfo *pi;
719 {
720 if (num_poll_list <= 0)
721 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
722 else
723 poll_list = (struct pollfd *) xrealloc (poll_list,
724 (num_poll_list + 1)
725 * sizeof (struct pollfd));
726 poll_list[num_poll_list].fd = pi->ctl_fd;
727 #ifdef UNIXWARE
728 poll_list[num_poll_list].events = POLLWRNORM;
729 #else
730 poll_list[num_poll_list].events = POLLPRI;
731 #endif
732
733 num_poll_list++;
734 }
735
736 /*
737
738 LOCAL FUNCTION
739
740 remove_fd -- Remove the fd from the poll/select list
741
742 SYNOPSIS
743
744 static void remove_fd (struct procinfo *);
745
746 DESCRIPTION
747
748 Remove the fd of the supplied procinfo from the list of fds used
749 for poll/select operations.
750 */
751
752 static void
753 remove_fd (pi)
754 struct procinfo *pi;
755 {
756 int i;
757
758 for (i = 0; i < num_poll_list; i++)
759 {
760 if (poll_list[i].fd == pi->ctl_fd)
761 {
762 if (i != num_poll_list - 1)
763 memcpy (poll_list + i, poll_list + i + 1,
764 (num_poll_list - i - 1) * sizeof (struct pollfd));
765
766 num_poll_list--;
767
768 if (num_poll_list == 0)
769 free (poll_list);
770 else
771 poll_list = (struct pollfd *) xrealloc (poll_list,
772 num_poll_list
773 * sizeof (struct pollfd));
774 return;
775 }
776 }
777 }
778
779 /*
780
781 LOCAL FUNCTION
782
783 procfs_read_status - get procfs fd status
784
785 SYNOPSIS
786
787 static int procfs_read_status (pi) struct procinfo *pi;
788
789 DESCRIPTION
790
791 Given a pointer to a procinfo struct, get the status of
792 the status_fd in the appropriate way. Returns 0 on failure,
793 1 on success.
794 */
795
796 static int
797 procfs_read_status (pi)
798 struct procinfo *pi;
799 {
800 #ifdef PROCFS_USE_READ_WRITE
801 if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) ||
802 (read (pi->status_fd, (char *) &pi->prstatus,
803 sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t)))
804 #else
805 if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0)
806 #endif
807 return 0;
808 else
809 return 1;
810 }
811
812 /*
813
814 LOCAL FUNCTION
815
816 procfs_write_pcwstop - send a PCWSTOP to procfs fd
817
818 SYNOPSIS
819
820 static int procfs_write_pcwstop (pi) struct procinfo *pi;
821
822 DESCRIPTION
823
824 Given a pointer to a procinfo struct, send a PCWSTOP to
825 the ctl_fd in the appropriate way. Returns 0 on failure,
826 1 on success.
827 */
828
829 static int
830 procfs_write_pcwstop (pi)
831 struct procinfo *pi;
832 {
833 #ifdef PROCFS_USE_READ_WRITE
834 long cmd = PCWSTOP;
835 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
836 #else
837 if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0)
838 #endif
839 return 0;
840 else
841 return 1;
842 }
843
844 /*
845
846 LOCAL FUNCTION
847
848 procfs_write_pckill - send a kill to procfs fd
849
850 SYNOPSIS
851
852 static void procfs_write_pckill (pi) struct procinfo *pi;
853
854 DESCRIPTION
855
856 Given a pointer to a procinfo struct, send a kill to
857 the ctl_fd in the appropriate way. Returns 0 on failure,
858 1 on success.
859 */
860
861 static void
862 procfs_write_pckill (pi)
863 struct procinfo *pi;
864 {
865 #ifdef PROCFS_USE_READ_WRITE
866 struct proc_ctl pctl;
867 pctl.cmd = PCKILL;
868 pctl.data = SIGKILL;
869 write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl));
870 #else
871 int signo = SIGKILL;
872 ioctl (pi->ctl_fd, PIOCKILL, &signo);
873 #endif
874 }
875
876 static struct procinfo *
877 wait_fd ()
878 {
879 struct procinfo *pi, *next_pi;
880 #ifndef LOSING_POLL
881 int num_fds;
882 int i;
883 #endif
884
885 set_sigint_trap (); /* Causes SIGINT to be passed on to the
886 attached process. */
887 set_sigio_trap ();
888
889 wait_again:
890 #ifndef LOSING_POLL
891 while (1)
892 {
893 num_fds = poll (poll_list, num_poll_list, -1);
894 if (num_fds > 0)
895 break;
896 if (num_fds < 0 && errno == EINTR)
897 continue;
898 print_sys_errmsg ("poll failed", errno);
899 error ("Poll failed, returned %d", num_fds);
900 }
901 #else /* LOSING_POLL */
902 pi = current_procinfo;
903
904 while (!procfs_write_pcwstop (pi))
905 {
906 if (errno == ENOENT)
907 {
908 /* Process exited. */
909 pi->prstatus.pr_flags = 0;
910 break;
911 }
912 else if (errno != EINTR)
913 {
914 print_sys_errmsg (pi->pathname, errno);
915 error ("procfs_write_pcwstop failed");
916 }
917 }
918 pi->had_event = 1;
919 #endif /* LOSING_POLL */
920
921 clear_sigint_trap ();
922 clear_sigio_trap ();
923
924 #ifndef LOSING_POLL
925
926 for (i = 0; i < num_poll_list && num_fds > 0; i++)
927 {
928 if (0 == (poll_list[i].revents &
929 (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL)))
930 continue;
931 for (pi = procinfo_list; pi; pi = next_pi)
932 {
933 next_pi = pi->next;
934 if (poll_list[i].fd == pi->ctl_fd)
935 {
936 num_fds--;
937 if ((poll_list[i].revents & POLLHUP) != 0 ||
938 !procfs_read_status(pi))
939 { /* The LWP has apparently terminated. */
940 if (num_poll_list <= 1)
941 {
942 pi->prstatus.pr_flags = 0;
943 pi->had_event = 1;
944 break;
945 }
946 if (info_verbose)
947 printf_filtered ("LWP %d exited.\n",
948 (pi->pid >> 16) & 0xffff);
949 close_proc_file (pi);
950 if (num_fds != 0)
951 continue; /* already another event to process */
952 else
953 goto wait_again; /* wait for another event */
954 }
955 pi->had_event = 1;
956 break;
957 }
958 }
959 if (!pi)
960 error ("wait_fd: Couldn't find procinfo for fd %d\n",
961 poll_list[i].fd);
962 }
963 #endif /* LOSING_POLL */
964
965 return pi;
966 }
967
968 /*
969
970 LOCAL FUNCTION
971
972 lookupdesc -- translate a value to a summary desc string
973
974 SYNOPSIS
975
976 static char *lookupdesc (struct trans *transp, unsigned int val);
977
978 DESCRIPTION
979
980 Given a pointer to a translation table and a value to be translated,
981 lookup the desc string and return it.
982 */
983
984 static char *
985 lookupdesc (transp, val)
986 struct trans *transp;
987 unsigned int val;
988 {
989 char *desc;
990
991 for (desc = NULL; transp -> name != NULL; transp++)
992 {
993 if (transp -> value == val)
994 {
995 desc = transp -> desc;
996 break;
997 }
998 }
999
1000 /* Didn't find a translation for the specified value, set a default one. */
1001
1002 if (desc == NULL)
1003 {
1004 desc = "Unknown";
1005 }
1006 return (desc);
1007 }
1008
1009 /*
1010
1011 LOCAL FUNCTION
1012
1013 lookupname -- translate a value to symbolic name
1014
1015 SYNOPSIS
1016
1017 static char *lookupname (struct trans *transp, unsigned int val,
1018 char *prefix);
1019
1020 DESCRIPTION
1021
1022 Given a pointer to a translation table, a value to be translated,
1023 and a default prefix to return if the value can't be translated,
1024 match the value with one of the translation table entries and
1025 return a pointer to the symbolic name.
1026
1027 If no match is found it just returns the value as a printable string,
1028 with the given prefix. The previous such value, if any, is freed
1029 at this time.
1030 */
1031
1032 static char *
1033 lookupname (transp, val, prefix)
1034 struct trans *transp;
1035 unsigned int val;
1036 char *prefix;
1037 {
1038 static char *locbuf;
1039 char *name;
1040
1041 for (name = NULL; transp -> name != NULL; transp++)
1042 {
1043 if (transp -> value == val)
1044 {
1045 name = transp -> name;
1046 break;
1047 }
1048 }
1049
1050 /* Didn't find a translation for the specified value, build a default
1051 one using the specified prefix and return it. The lifetime of
1052 the value is only until the next one is needed. */
1053
1054 if (name == NULL)
1055 {
1056 if (locbuf != NULL)
1057 {
1058 free (locbuf);
1059 }
1060 locbuf = xmalloc (strlen (prefix) + 16);
1061 sprintf (locbuf, "%s %u", prefix, val);
1062 name = locbuf;
1063 }
1064 return (name);
1065 }
1066
1067 static char *
1068 sigcodename (sip)
1069 siginfo_t *sip;
1070 {
1071 struct sigcode *scp;
1072 char *name = NULL;
1073 static char locbuf[32];
1074
1075 for (scp = siginfo_table; scp -> codename != NULL; scp++)
1076 {
1077 if ((scp -> signo == sip -> si_signo) &&
1078 (scp -> code == sip -> si_code))
1079 {
1080 name = scp -> codename;
1081 break;
1082 }
1083 }
1084 if (name == NULL)
1085 {
1086 sprintf (locbuf, "sigcode %u", sip -> si_signo);
1087 name = locbuf;
1088 }
1089 return (name);
1090 }
1091
1092 static char *
1093 sigcodedesc (sip)
1094 siginfo_t *sip;
1095 {
1096 struct sigcode *scp;
1097 char *desc = NULL;
1098
1099 for (scp = siginfo_table; scp -> codename != NULL; scp++)
1100 {
1101 if ((scp -> signo == sip -> si_signo) &&
1102 (scp -> code == sip -> si_code))
1103 {
1104 desc = scp -> desc;
1105 break;
1106 }
1107 }
1108 if (desc == NULL)
1109 {
1110 desc = "Unrecognized signal or trap use";
1111 }
1112 return (desc);
1113 }
1114
1115 /*
1116
1117 LOCAL FUNCTION
1118
1119 syscallname - translate a system call number into a system call name
1120
1121 SYNOPSIS
1122
1123 char *syscallname (int syscallnum)
1124
1125 DESCRIPTION
1126
1127 Given a system call number, translate it into the printable name
1128 of a system call, or into "syscall <num>" if it is an unknown
1129 number.
1130 */
1131
1132 static char *
1133 syscallname (syscallnum)
1134 int syscallnum;
1135 {
1136 static char locbuf[32];
1137
1138 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS
1139 && syscall_table[syscallnum] != NULL)
1140 return syscall_table[syscallnum];
1141 else
1142 {
1143 sprintf (locbuf, "syscall %u", syscallnum);
1144 return locbuf;
1145 }
1146 }
1147
1148 /*
1149
1150 LOCAL FUNCTION
1151
1152 init_syscall_table - initialize syscall translation table
1153
1154 SYNOPSIS
1155
1156 void init_syscall_table (void)
1157
1158 DESCRIPTION
1159
1160 Dynamically initialize the translation table to convert system
1161 call numbers into printable system call names. Done once per
1162 gdb run, on initialization.
1163
1164 NOTES
1165
1166 This is awfully ugly, but preprocessor tricks to make it prettier
1167 tend to be nonportable.
1168 */
1169
1170 static void
1171 init_syscall_table ()
1172 {
1173 #if defined (SYS_exit)
1174 syscall_table[SYS_exit] = "exit";
1175 #endif
1176 #if defined (SYS_fork)
1177 syscall_table[SYS_fork] = "fork";
1178 #endif
1179 #if defined (SYS_read)
1180 syscall_table[SYS_read] = "read";
1181 #endif
1182 #if defined (SYS_write)
1183 syscall_table[SYS_write] = "write";
1184 #endif
1185 #if defined (SYS_open)
1186 syscall_table[SYS_open] = "open";
1187 #endif
1188 #if defined (SYS_close)
1189 syscall_table[SYS_close] = "close";
1190 #endif
1191 #if defined (SYS_wait)
1192 syscall_table[SYS_wait] = "wait";
1193 #endif
1194 #if defined (SYS_creat)
1195 syscall_table[SYS_creat] = "creat";
1196 #endif
1197 #if defined (SYS_link)
1198 syscall_table[SYS_link] = "link";
1199 #endif
1200 #if defined (SYS_unlink)
1201 syscall_table[SYS_unlink] = "unlink";
1202 #endif
1203 #if defined (SYS_exec)
1204 syscall_table[SYS_exec] = "exec";
1205 #endif
1206 #if defined (SYS_execv)
1207 syscall_table[SYS_execv] = "execv";
1208 #endif
1209 #if defined (SYS_execve)
1210 syscall_table[SYS_execve] = "execve";
1211 #endif
1212 #if defined (SYS_chdir)
1213 syscall_table[SYS_chdir] = "chdir";
1214 #endif
1215 #if defined (SYS_time)
1216 syscall_table[SYS_time] = "time";
1217 #endif
1218 #if defined (SYS_mknod)
1219 syscall_table[SYS_mknod] = "mknod";
1220 #endif
1221 #if defined (SYS_chmod)
1222 syscall_table[SYS_chmod] = "chmod";
1223 #endif
1224 #if defined (SYS_chown)
1225 syscall_table[SYS_chown] = "chown";
1226 #endif
1227 #if defined (SYS_brk)
1228 syscall_table[SYS_brk] = "brk";
1229 #endif
1230 #if defined (SYS_stat)
1231 syscall_table[SYS_stat] = "stat";
1232 #endif
1233 #if defined (SYS_lseek)
1234 syscall_table[SYS_lseek] = "lseek";
1235 #endif
1236 #if defined (SYS_getpid)
1237 syscall_table[SYS_getpid] = "getpid";
1238 #endif
1239 #if defined (SYS_mount)
1240 syscall_table[SYS_mount] = "mount";
1241 #endif
1242 #if defined (SYS_umount)
1243 syscall_table[SYS_umount] = "umount";
1244 #endif
1245 #if defined (SYS_setuid)
1246 syscall_table[SYS_setuid] = "setuid";
1247 #endif
1248 #if defined (SYS_getuid)
1249 syscall_table[SYS_getuid] = "getuid";
1250 #endif
1251 #if defined (SYS_stime)
1252 syscall_table[SYS_stime] = "stime";
1253 #endif
1254 #if defined (SYS_ptrace)
1255 syscall_table[SYS_ptrace] = "ptrace";
1256 #endif
1257 #if defined (SYS_alarm)
1258 syscall_table[SYS_alarm] = "alarm";
1259 #endif
1260 #if defined (SYS_fstat)
1261 syscall_table[SYS_fstat] = "fstat";
1262 #endif
1263 #if defined (SYS_pause)
1264 syscall_table[SYS_pause] = "pause";
1265 #endif
1266 #if defined (SYS_utime)
1267 syscall_table[SYS_utime] = "utime";
1268 #endif
1269 #if defined (SYS_stty)
1270 syscall_table[SYS_stty] = "stty";
1271 #endif
1272 #if defined (SYS_gtty)
1273 syscall_table[SYS_gtty] = "gtty";
1274 #endif
1275 #if defined (SYS_access)
1276 syscall_table[SYS_access] = "access";
1277 #endif
1278 #if defined (SYS_nice)
1279 syscall_table[SYS_nice] = "nice";
1280 #endif
1281 #if defined (SYS_statfs)
1282 syscall_table[SYS_statfs] = "statfs";
1283 #endif
1284 #if defined (SYS_sync)
1285 syscall_table[SYS_sync] = "sync";
1286 #endif
1287 #if defined (SYS_kill)
1288 syscall_table[SYS_kill] = "kill";
1289 #endif
1290 #if defined (SYS_fstatfs)
1291 syscall_table[SYS_fstatfs] = "fstatfs";
1292 #endif
1293 #if defined (SYS_pgrpsys)
1294 syscall_table[SYS_pgrpsys] = "pgrpsys";
1295 #endif
1296 #if defined (SYS_xenix)
1297 syscall_table[SYS_xenix] = "xenix";
1298 #endif
1299 #if defined (SYS_dup)
1300 syscall_table[SYS_dup] = "dup";
1301 #endif
1302 #if defined (SYS_pipe)
1303 syscall_table[SYS_pipe] = "pipe";
1304 #endif
1305 #if defined (SYS_times)
1306 syscall_table[SYS_times] = "times";
1307 #endif
1308 #if defined (SYS_profil)
1309 syscall_table[SYS_profil] = "profil";
1310 #endif
1311 #if defined (SYS_plock)
1312 syscall_table[SYS_plock] = "plock";
1313 #endif
1314 #if defined (SYS_setgid)
1315 syscall_table[SYS_setgid] = "setgid";
1316 #endif
1317 #if defined (SYS_getgid)
1318 syscall_table[SYS_getgid] = "getgid";
1319 #endif
1320 #if defined (SYS_signal)
1321 syscall_table[SYS_signal] = "signal";
1322 #endif
1323 #if defined (SYS_msgsys)
1324 syscall_table[SYS_msgsys] = "msgsys";
1325 #endif
1326 #if defined (SYS_sys3b)
1327 syscall_table[SYS_sys3b] = "sys3b";
1328 #endif
1329 #if defined (SYS_sysi86)
1330 syscall_table[SYS_sysi86] = "sysi86";
1331 #endif
1332 #if defined (SYS_acct)
1333 syscall_table[SYS_acct] = "acct";
1334 #endif
1335 #if defined (SYS_shmsys)
1336 syscall_table[SYS_shmsys] = "shmsys";
1337 #endif
1338 #if defined (SYS_semsys)
1339 syscall_table[SYS_semsys] = "semsys";
1340 #endif
1341 #if defined (SYS_ioctl)
1342 syscall_table[SYS_ioctl] = "ioctl";
1343 #endif
1344 #if defined (SYS_uadmin)
1345 syscall_table[SYS_uadmin] = "uadmin";
1346 #endif
1347 #if defined (SYS_utssys)
1348 syscall_table[SYS_utssys] = "utssys";
1349 #endif
1350 #if defined (SYS_fsync)
1351 syscall_table[SYS_fsync] = "fsync";
1352 #endif
1353 #if defined (SYS_umask)
1354 syscall_table[SYS_umask] = "umask";
1355 #endif
1356 #if defined (SYS_chroot)
1357 syscall_table[SYS_chroot] = "chroot";
1358 #endif
1359 #if defined (SYS_fcntl)
1360 syscall_table[SYS_fcntl] = "fcntl";
1361 #endif
1362 #if defined (SYS_ulimit)
1363 syscall_table[SYS_ulimit] = "ulimit";
1364 #endif
1365 #if defined (SYS_rfsys)
1366 syscall_table[SYS_rfsys] = "rfsys";
1367 #endif
1368 #if defined (SYS_rmdir)
1369 syscall_table[SYS_rmdir] = "rmdir";
1370 #endif
1371 #if defined (SYS_mkdir)
1372 syscall_table[SYS_mkdir] = "mkdir";
1373 #endif
1374 #if defined (SYS_getdents)
1375 syscall_table[SYS_getdents] = "getdents";
1376 #endif
1377 #if defined (SYS_sysfs)
1378 syscall_table[SYS_sysfs] = "sysfs";
1379 #endif
1380 #if defined (SYS_getmsg)
1381 syscall_table[SYS_getmsg] = "getmsg";
1382 #endif
1383 #if defined (SYS_putmsg)
1384 syscall_table[SYS_putmsg] = "putmsg";
1385 #endif
1386 #if defined (SYS_poll)
1387 syscall_table[SYS_poll] = "poll";
1388 #endif
1389 #if defined (SYS_lstat)
1390 syscall_table[SYS_lstat] = "lstat";
1391 #endif
1392 #if defined (SYS_symlink)
1393 syscall_table[SYS_symlink] = "symlink";
1394 #endif
1395 #if defined (SYS_readlink)
1396 syscall_table[SYS_readlink] = "readlink";
1397 #endif
1398 #if defined (SYS_setgroups)
1399 syscall_table[SYS_setgroups] = "setgroups";
1400 #endif
1401 #if defined (SYS_getgroups)
1402 syscall_table[SYS_getgroups] = "getgroups";
1403 #endif
1404 #if defined (SYS_fchmod)
1405 syscall_table[SYS_fchmod] = "fchmod";
1406 #endif
1407 #if defined (SYS_fchown)
1408 syscall_table[SYS_fchown] = "fchown";
1409 #endif
1410 #if defined (SYS_sigprocmask)
1411 syscall_table[SYS_sigprocmask] = "sigprocmask";
1412 #endif
1413 #if defined (SYS_sigsuspend)
1414 syscall_table[SYS_sigsuspend] = "sigsuspend";
1415 #endif
1416 #if defined (SYS_sigaltstack)
1417 syscall_table[SYS_sigaltstack] = "sigaltstack";
1418 #endif
1419 #if defined (SYS_sigaction)
1420 syscall_table[SYS_sigaction] = "sigaction";
1421 #endif
1422 #if defined (SYS_sigpending)
1423 syscall_table[SYS_sigpending] = "sigpending";
1424 #endif
1425 #if defined (SYS_context)
1426 syscall_table[SYS_context] = "context";
1427 #endif
1428 #if defined (SYS_evsys)
1429 syscall_table[SYS_evsys] = "evsys";
1430 #endif
1431 #if defined (SYS_evtrapret)
1432 syscall_table[SYS_evtrapret] = "evtrapret";
1433 #endif
1434 #if defined (SYS_statvfs)
1435 syscall_table[SYS_statvfs] = "statvfs";
1436 #endif
1437 #if defined (SYS_fstatvfs)
1438 syscall_table[SYS_fstatvfs] = "fstatvfs";
1439 #endif
1440 #if defined (SYS_nfssys)
1441 syscall_table[SYS_nfssys] = "nfssys";
1442 #endif
1443 #if defined (SYS_waitsys)
1444 syscall_table[SYS_waitsys] = "waitsys";
1445 #endif
1446 #if defined (SYS_sigsendsys)
1447 syscall_table[SYS_sigsendsys] = "sigsendsys";
1448 #endif
1449 #if defined (SYS_hrtsys)
1450 syscall_table[SYS_hrtsys] = "hrtsys";
1451 #endif
1452 #if defined (SYS_acancel)
1453 syscall_table[SYS_acancel] = "acancel";
1454 #endif
1455 #if defined (SYS_async)
1456 syscall_table[SYS_async] = "async";
1457 #endif
1458 #if defined (SYS_priocntlsys)
1459 syscall_table[SYS_priocntlsys] = "priocntlsys";
1460 #endif
1461 #if defined (SYS_pathconf)
1462 syscall_table[SYS_pathconf] = "pathconf";
1463 #endif
1464 #if defined (SYS_mincore)
1465 syscall_table[SYS_mincore] = "mincore";
1466 #endif
1467 #if defined (SYS_mmap)
1468 syscall_table[SYS_mmap] = "mmap";
1469 #endif
1470 #if defined (SYS_mprotect)
1471 syscall_table[SYS_mprotect] = "mprotect";
1472 #endif
1473 #if defined (SYS_munmap)
1474 syscall_table[SYS_munmap] = "munmap";
1475 #endif
1476 #if defined (SYS_fpathconf)
1477 syscall_table[SYS_fpathconf] = "fpathconf";
1478 #endif
1479 #if defined (SYS_vfork)
1480 syscall_table[SYS_vfork] = "vfork";
1481 #endif
1482 #if defined (SYS_fchdir)
1483 syscall_table[SYS_fchdir] = "fchdir";
1484 #endif
1485 #if defined (SYS_readv)
1486 syscall_table[SYS_readv] = "readv";
1487 #endif
1488 #if defined (SYS_writev)
1489 syscall_table[SYS_writev] = "writev";
1490 #endif
1491 #if defined (SYS_xstat)
1492 syscall_table[SYS_xstat] = "xstat";
1493 #endif
1494 #if defined (SYS_lxstat)
1495 syscall_table[SYS_lxstat] = "lxstat";
1496 #endif
1497 #if defined (SYS_fxstat)
1498 syscall_table[SYS_fxstat] = "fxstat";
1499 #endif
1500 #if defined (SYS_xmknod)
1501 syscall_table[SYS_xmknod] = "xmknod";
1502 #endif
1503 #if defined (SYS_clocal)
1504 syscall_table[SYS_clocal] = "clocal";
1505 #endif
1506 #if defined (SYS_setrlimit)
1507 syscall_table[SYS_setrlimit] = "setrlimit";
1508 #endif
1509 #if defined (SYS_getrlimit)
1510 syscall_table[SYS_getrlimit] = "getrlimit";
1511 #endif
1512 #if defined (SYS_lchown)
1513 syscall_table[SYS_lchown] = "lchown";
1514 #endif
1515 #if defined (SYS_memcntl)
1516 syscall_table[SYS_memcntl] = "memcntl";
1517 #endif
1518 #if defined (SYS_getpmsg)
1519 syscall_table[SYS_getpmsg] = "getpmsg";
1520 #endif
1521 #if defined (SYS_putpmsg)
1522 syscall_table[SYS_putpmsg] = "putpmsg";
1523 #endif
1524 #if defined (SYS_rename)
1525 syscall_table[SYS_rename] = "rename";
1526 #endif
1527 #if defined (SYS_uname)
1528 syscall_table[SYS_uname] = "uname";
1529 #endif
1530 #if defined (SYS_setegid)
1531 syscall_table[SYS_setegid] = "setegid";
1532 #endif
1533 #if defined (SYS_sysconfig)
1534 syscall_table[SYS_sysconfig] = "sysconfig";
1535 #endif
1536 #if defined (SYS_adjtime)
1537 syscall_table[SYS_adjtime] = "adjtime";
1538 #endif
1539 #if defined (SYS_systeminfo)
1540 syscall_table[SYS_systeminfo] = "systeminfo";
1541 #endif
1542 #if defined (SYS_seteuid)
1543 syscall_table[SYS_seteuid] = "seteuid";
1544 #endif
1545 #if defined (SYS_sproc)
1546 syscall_table[SYS_sproc] = "sproc";
1547 #endif
1548 #if defined (SYS_keyctl)
1549 syscall_table[SYS_keyctl] = "keyctl";
1550 #endif
1551 #if defined (SYS_secsys)
1552 syscall_table[SYS_secsys] = "secsys";
1553 #endif
1554 #if defined (SYS_filepriv)
1555 syscall_table[SYS_filepriv] = "filepriv";
1556 #endif
1557 #if defined (SYS_procpriv)
1558 syscall_table[SYS_procpriv] = "procpriv";
1559 #endif
1560 #if defined (SYS_devstat)
1561 syscall_table[SYS_devstat] = "devstat";
1562 #endif
1563 #if defined (SYS_aclipc)
1564 syscall_table[SYS_aclipc] = "aclipc";
1565 #endif
1566 #if defined (SYS_fdevstat)
1567 syscall_table[SYS_fdevstat] = "fdevstat";
1568 #endif
1569 #if defined (SYS_flvlfile)
1570 syscall_table[SYS_flvlfile] = "flvlfile";
1571 #endif
1572 #if defined (SYS_lvlfile)
1573 syscall_table[SYS_lvlfile] = "lvlfile";
1574 #endif
1575 #if defined (SYS_lvlequal)
1576 syscall_table[SYS_lvlequal] = "lvlequal";
1577 #endif
1578 #if defined (SYS_lvlproc)
1579 syscall_table[SYS_lvlproc] = "lvlproc";
1580 #endif
1581 #if defined (SYS_lvlipc)
1582 syscall_table[SYS_lvlipc] = "lvlipc";
1583 #endif
1584 #if defined (SYS_acl)
1585 syscall_table[SYS_acl] = "acl";
1586 #endif
1587 #if defined (SYS_auditevt)
1588 syscall_table[SYS_auditevt] = "auditevt";
1589 #endif
1590 #if defined (SYS_auditctl)
1591 syscall_table[SYS_auditctl] = "auditctl";
1592 #endif
1593 #if defined (SYS_auditdmp)
1594 syscall_table[SYS_auditdmp] = "auditdmp";
1595 #endif
1596 #if defined (SYS_auditlog)
1597 syscall_table[SYS_auditlog] = "auditlog";
1598 #endif
1599 #if defined (SYS_auditbuf)
1600 syscall_table[SYS_auditbuf] = "auditbuf";
1601 #endif
1602 #if defined (SYS_lvldom)
1603 syscall_table[SYS_lvldom] = "lvldom";
1604 #endif
1605 #if defined (SYS_lvlvfs)
1606 syscall_table[SYS_lvlvfs] = "lvlvfs";
1607 #endif
1608 #if defined (SYS_mkmld)
1609 syscall_table[SYS_mkmld] = "mkmld";
1610 #endif
1611 #if defined (SYS_mldmode)
1612 syscall_table[SYS_mldmode] = "mldmode";
1613 #endif
1614 #if defined (SYS_secadvise)
1615 syscall_table[SYS_secadvise] = "secadvise";
1616 #endif
1617 #if defined (SYS_online)
1618 syscall_table[SYS_online] = "online";
1619 #endif
1620 #if defined (SYS_setitimer)
1621 syscall_table[SYS_setitimer] = "setitimer";
1622 #endif
1623 #if defined (SYS_getitimer)
1624 syscall_table[SYS_getitimer] = "getitimer";
1625 #endif
1626 #if defined (SYS_gettimeofday)
1627 syscall_table[SYS_gettimeofday] = "gettimeofday";
1628 #endif
1629 #if defined (SYS_settimeofday)
1630 syscall_table[SYS_settimeofday] = "settimeofday";
1631 #endif
1632 #if defined (SYS_lwp_create)
1633 syscall_table[SYS_lwp_create] = "_lwp_create";
1634 #endif
1635 #if defined (SYS_lwp_exit)
1636 syscall_table[SYS_lwp_exit] = "_lwp_exit";
1637 #endif
1638 #if defined (SYS_lwp_wait)
1639 syscall_table[SYS_lwp_wait] = "_lwp_wait";
1640 #endif
1641 #if defined (SYS_lwp_self)
1642 syscall_table[SYS_lwp_self] = "_lwp_self";
1643 #endif
1644 #if defined (SYS_lwp_info)
1645 syscall_table[SYS_lwp_info] = "_lwp_info";
1646 #endif
1647 #if defined (SYS_lwp_private)
1648 syscall_table[SYS_lwp_private] = "_lwp_private";
1649 #endif
1650 #if defined (SYS_processor_bind)
1651 syscall_table[SYS_processor_bind] = "processor_bind";
1652 #endif
1653 #if defined (SYS_processor_exbind)
1654 syscall_table[SYS_processor_exbind] = "processor_exbind";
1655 #endif
1656 #if defined (SYS_prepblock)
1657 syscall_table[SYS_prepblock] = "prepblock";
1658 #endif
1659 #if defined (SYS_block)
1660 syscall_table[SYS_block] = "block";
1661 #endif
1662 #if defined (SYS_rdblock)
1663 syscall_table[SYS_rdblock] = "rdblock";
1664 #endif
1665 #if defined (SYS_unblock)
1666 syscall_table[SYS_unblock] = "unblock";
1667 #endif
1668 #if defined (SYS_cancelblock)
1669 syscall_table[SYS_cancelblock] = "cancelblock";
1670 #endif
1671 #if defined (SYS_pread)
1672 syscall_table[SYS_pread] = "pread";
1673 #endif
1674 #if defined (SYS_pwrite)
1675 syscall_table[SYS_pwrite] = "pwrite";
1676 #endif
1677 #if defined (SYS_truncate)
1678 syscall_table[SYS_truncate] = "truncate";
1679 #endif
1680 #if defined (SYS_ftruncate)
1681 syscall_table[SYS_ftruncate] = "ftruncate";
1682 #endif
1683 #if defined (SYS_lwp_kill)
1684 syscall_table[SYS_lwp_kill] = "_lwp_kill";
1685 #endif
1686 #if defined (SYS_sigwait)
1687 syscall_table[SYS_sigwait] = "sigwait";
1688 #endif
1689 #if defined (SYS_fork1)
1690 syscall_table[SYS_fork1] = "fork1";
1691 #endif
1692 #if defined (SYS_forkall)
1693 syscall_table[SYS_forkall] = "forkall";
1694 #endif
1695 #if defined (SYS_modload)
1696 syscall_table[SYS_modload] = "modload";
1697 #endif
1698 #if defined (SYS_moduload)
1699 syscall_table[SYS_moduload] = "moduload";
1700 #endif
1701 #if defined (SYS_modpath)
1702 syscall_table[SYS_modpath] = "modpath";
1703 #endif
1704 #if defined (SYS_modstat)
1705 syscall_table[SYS_modstat] = "modstat";
1706 #endif
1707 #if defined (SYS_modadm)
1708 syscall_table[SYS_modadm] = "modadm";
1709 #endif
1710 #if defined (SYS_getksym)
1711 syscall_table[SYS_getksym] = "getksym";
1712 #endif
1713 #if defined (SYS_lwp_suspend)
1714 syscall_table[SYS_lwp_suspend] = "_lwp_suspend";
1715 #endif
1716 #if defined (SYS_lwp_continue)
1717 syscall_table[SYS_lwp_continue] = "_lwp_continue";
1718 #endif
1719 #if defined (SYS_priocntllst)
1720 syscall_table[SYS_priocntllst] = "priocntllst";
1721 #endif
1722 #if defined (SYS_sleep)
1723 syscall_table[SYS_sleep] = "sleep";
1724 #endif
1725 #if defined (SYS_lwp_sema_wait)
1726 syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait";
1727 #endif
1728 #if defined (SYS_lwp_sema_post)
1729 syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post";
1730 #endif
1731 #if defined (SYS_lwp_sema_trywait)
1732 syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait";
1733 #endif
1734 #if defined(SYS_fstatvfs64)
1735 syscall_table[SYS_fstatvfs64] = "fstatvfs64";
1736 #endif
1737 #if defined(SYS_statvfs64)
1738 syscall_table[SYS_statvfs64] = "statvfs64";
1739 #endif
1740 #if defined(SYS_ftruncate64)
1741 syscall_table[SYS_ftruncate64] = "ftruncate64";
1742 #endif
1743 #if defined(SYS_truncate64)
1744 syscall_table[SYS_truncate64] = "truncate64";
1745 #endif
1746 #if defined(SYS_getrlimit64)
1747 syscall_table[SYS_getrlimit64] = "getrlimit64";
1748 #endif
1749 #if defined(SYS_setrlimit64)
1750 syscall_table[SYS_setrlimit64] = "setrlimit64";
1751 #endif
1752 #if defined(SYS_lseek64)
1753 syscall_table[SYS_lseek64] = "lseek64";
1754 #endif
1755 #if defined(SYS_mmap64)
1756 syscall_table[SYS_mmap64] = "mmap64";
1757 #endif
1758 #if defined(SYS_pread64)
1759 syscall_table[SYS_pread64] = "pread64";
1760 #endif
1761 #if defined(SYS_creat64)
1762 syscall_table[SYS_creat64] = "creat64";
1763 #endif
1764 #if defined(SYS_dshmsys)
1765 syscall_table[SYS_dshmsys] = "dshmsys";
1766 #endif
1767 #if defined(SYS_invlpg)
1768 syscall_table[SYS_invlpg] = "invlpg";
1769 #endif
1770 #if defined(SYS_cg_ids)
1771 syscall_table[SYS_cg_ids] = "cg_ids";
1772 #endif
1773 #if defined(SYS_cg_processors)
1774 syscall_table[SYS_cg_processors] = "cg_processors";
1775 #endif
1776 #if defined(SYS_cg_info)
1777 syscall_table[SYS_cg_info] = "cg_info";
1778 #endif
1779 #if defined(SYS_cg_bind)
1780 syscall_table[SYS_cg_bind] = "cg_bind";
1781 #endif
1782 #if defined(SYS_cg_current)
1783 syscall_table[SYS_cg_current] = "cg_current";
1784 #endif
1785 #if defined(SYS_cg_memloc)
1786 syscall_table[SYS_cg_memloc] = "cg_memloc";
1787 #endif
1788 }
1789
1790 /*
1791
1792 LOCAL FUNCTION
1793
1794 procfs_kill_inferior - kill any currently inferior
1795
1796 SYNOPSIS
1797
1798 void procfs_kill_inferior (void)
1799
1800 DESCRIPTION
1801
1802 Kill any current inferior.
1803
1804 NOTES
1805
1806 Kills even attached inferiors. Presumably the user has already
1807 been prompted that the inferior is an attached one rather than
1808 one started by gdb. (FIXME?)
1809
1810 */
1811
1812 static void
1813 procfs_kill_inferior ()
1814 {
1815 target_mourn_inferior ();
1816 }
1817
1818 /*
1819
1820 LOCAL FUNCTION
1821
1822 unconditionally_kill_inferior - terminate the inferior
1823
1824 SYNOPSIS
1825
1826 static void unconditionally_kill_inferior (struct procinfo *)
1827
1828 DESCRIPTION
1829
1830 Kill the specified inferior.
1831
1832 NOTE
1833
1834 A possibly useful enhancement would be to first try sending
1835 the inferior a terminate signal, politely asking it to commit
1836 suicide, before we murder it (we could call that
1837 politely_kill_inferior()).
1838
1839 */
1840
1841 static void
1842 unconditionally_kill_inferior (pi)
1843 struct procinfo *pi;
1844 {
1845 int ppid;
1846 struct proc_ctl pctl;
1847
1848 ppid = pi->prstatus.pr_ppid;
1849
1850 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
1851 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1852 before the PIOCKILL, otherwise it might generate a corrupted core
1853 file for the inferior. */
1854 ioctl (pi->ctl_fd, PIOCSSIG, NULL);
1855 #endif
1856 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1857 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1858 to kill the inferior, otherwise it might remain stopped with a
1859 pending SIGKILL.
1860 We do not check the result of the PIOCSSIG, the inferior might have
1861 died already. */
1862 {
1863 struct siginfo newsiginfo;
1864
1865 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
1866 newsiginfo.si_signo = SIGKILL;
1867 newsiginfo.si_code = 0;
1868 newsiginfo.si_errno = 0;
1869 newsiginfo.si_pid = getpid ();
1870 newsiginfo.si_uid = getuid ();
1871 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
1872 }
1873 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1874 procfs_write_pckill (pi);
1875 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1876
1877 close_proc_file (pi);
1878
1879 /* Only wait() for our direct children. Our grandchildren zombies are killed
1880 by the death of their parents. */
1881
1882 if (ppid == getpid())
1883 wait ((int *) 0);
1884 }
1885
1886 /*
1887
1888 LOCAL FUNCTION
1889
1890 procfs_xfer_memory -- copy data to or from inferior memory space
1891
1892 SYNOPSIS
1893
1894 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1895 int dowrite, struct target_ops target)
1896
1897 DESCRIPTION
1898
1899 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1900 from/to debugger memory starting at MYADDR. Copy from inferior
1901 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1902
1903 Returns the length copied, which is either the LEN argument or
1904 zero. This xfer function does not do partial moves, since procfs_ops
1905 doesn't allow memory operations to cross below us in the target stack
1906 anyway.
1907
1908 NOTES
1909
1910 The /proc interface makes this an almost trivial task.
1911 */
1912
1913 static int
1914 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1915 CORE_ADDR memaddr;
1916 char *myaddr;
1917 int len;
1918 int dowrite;
1919 struct target_ops *target; /* ignored */
1920 {
1921 int nbytes = 0;
1922 struct procinfo *pi;
1923
1924 pi = current_procinfo;
1925
1926 if (lseek(pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
1927 {
1928 if (dowrite)
1929 {
1930 nbytes = write (pi->as_fd, myaddr, len);
1931 }
1932 else
1933 {
1934 nbytes = read (pi->as_fd, myaddr, len);
1935 }
1936 if (nbytes < 0)
1937 {
1938 nbytes = 0;
1939 }
1940 }
1941 return (nbytes);
1942 }
1943
1944 /*
1945
1946 LOCAL FUNCTION
1947
1948 procfs_store_registers -- copy register values back to inferior
1949
1950 SYNOPSIS
1951
1952 void procfs_store_registers (int regno)
1953
1954 DESCRIPTION
1955
1956 Store our current register values back into the inferior. If
1957 REGNO is -1 then store all the register, otherwise store just
1958 the value specified by REGNO.
1959
1960 NOTES
1961
1962 If we are storing only a single register, we first have to get all
1963 the current values from the process, overwrite the desired register
1964 in the gregset with the one we want from gdb's registers, and then
1965 send the whole set back to the process. For writing all the
1966 registers, all we have to do is generate the gregset and send it to
1967 the process.
1968
1969 Also note that the process has to be stopped on an event of interest
1970 for this to work, which basically means that it has to have been
1971 run under the control of one of the other /proc ioctl calls and not
1972 ptrace. Since we don't use ptrace anyway, we don't worry about this
1973 fine point, but it is worth noting for future reference.
1974
1975 Gdb is confused about what this function is supposed to return.
1976 Some versions return a value, others return nothing. Some are
1977 declared to return a value and actually return nothing. Gdb ignores
1978 anything returned. (FIXME)
1979
1980 */
1981
1982 static void
1983 procfs_store_registers (regno)
1984 int regno;
1985 {
1986 struct procinfo *pi;
1987 #ifdef PROCFS_USE_READ_WRITE
1988 struct greg_ctl greg;
1989 struct fpreg_ctl fpreg;
1990 #endif
1991
1992 pi = current_procinfo;
1993
1994 #ifdef PROCFS_USE_READ_WRITE
1995 if (regno != -1)
1996 {
1997 procfs_read_status (pi);
1998 memcpy ((char *) &greg.gregset,
1999 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs,
2000 sizeof (gregset_t));
2001 }
2002 fill_gregset (&greg.gregset, regno);
2003 greg.cmd = PCSREG;
2004 write (pi->ctl_fd, &greg, sizeof (greg));
2005 #else /* PROCFS_USE_READ_WRITE */
2006 if (regno != -1)
2007 {
2008 ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset);
2009 }
2010 fill_gregset (&pi->gregset.gregset, regno);
2011 ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset);
2012 #endif /* PROCFS_USE_READ_WRITE */
2013
2014 #if defined (FP0_REGNUM)
2015
2016 /* Now repeat everything using the floating point register set, if the
2017 target has floating point hardware. Since we ignore the returned value,
2018 we'll never know whether it worked or not anyway. */
2019
2020 #ifdef PROCFS_USE_READ_WRITE
2021 if (regno != -1)
2022 {
2023 procfs_read_status (pi);
2024 memcpy ((char *) &fpreg.fpregset,
2025 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs,
2026 sizeof (fpregset_t));
2027 }
2028 fill_fpregset (&fpreg.fpregset, regno);
2029 fpreg.cmd = PCSFPREG;
2030 write (pi->ctl_fd, &fpreg, sizeof (fpreg));
2031 #else /* PROCFS_USE_READ_WRITE */
2032 if (regno != -1)
2033 {
2034 ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset);
2035 }
2036 fill_fpregset (&pi->fpregset.fpregset, regno);
2037 ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset);
2038 #endif /* PROCFS_USE_READ_WRITE */
2039
2040 #endif /* FP0_REGNUM */
2041
2042 }
2043
2044 /*
2045
2046 LOCAL FUNCTION
2047
2048 init_procinfo - setup a procinfo struct and connect it to a process
2049
2050 SYNOPSIS
2051
2052 struct procinfo * init_procinfo (int pid)
2053
2054 DESCRIPTION
2055
2056 Allocate a procinfo structure, open the /proc file and then set up the
2057 set of signals and faults that are to be traced. Returns a pointer to
2058 the new procinfo structure.
2059
2060 NOTES
2061
2062 If proc_init_failed ever gets called, control returns to the command
2063 processing loop via the standard error handling code.
2064
2065 */
2066
2067 static struct procinfo *
2068 init_procinfo (pid, kill)
2069 int pid;
2070 int kill;
2071 {
2072 struct procinfo *pi = (struct procinfo *)
2073 xmalloc (sizeof (struct procinfo));
2074 struct sig_ctl sctl;
2075 struct flt_ctl fctl;
2076
2077 memset ((char *) pi, 0, sizeof (*pi));
2078 if (!open_proc_file (pid, pi, O_RDWR, 1))
2079 proc_init_failed (pi, "can't open process file", kill);
2080
2081 /* open_proc_file may modify pid. */
2082
2083 pid = pi -> pid;
2084
2085 /* Add new process to process info list */
2086
2087 pi->next = procinfo_list;
2088 procinfo_list = pi;
2089
2090 add_fd (pi); /* Add to list for poll/select */
2091
2092 /* Remember some things about the inferior that we will, or might, change
2093 so that we can restore them when we detach. */
2094 #ifdef UNIXWARE
2095 memcpy ((char *) &pi->saved_trace.sigset,
2096 (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
2097 memcpy ((char *) &pi->saved_fltset.fltset,
2098 (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
2099 memcpy ((char *) &pi->saved_entryset.sysset,
2100 (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
2101 memcpy ((char *) &pi->saved_exitset.sysset,
2102 (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
2103
2104 /* Set up trace and fault sets, as gdb expects them. */
2105
2106 prfillset (&sctl.sigset);
2107 notice_signals (pi, &sctl);
2108 prfillset (&fctl.fltset);
2109 prdelset (&fctl.fltset, FLTPAGE);
2110
2111 #else /* ! UNIXWARE */
2112 ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
2113 ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
2114 ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
2115 ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
2116 ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
2117
2118 /* Set up trace and fault sets, as gdb expects them. */
2119
2120 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
2121 prfillset (&pi->prrun.pr_trace);
2122 procfs_notice_signals (pid);
2123 prfillset (&pi->prrun.pr_fault);
2124 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2125 #ifdef PROCFS_DONT_TRACE_FAULTS
2126 premptyset (&pi->prrun.pr_fault);
2127 #endif
2128 #endif /* UNIXWARE */
2129
2130 if (!procfs_read_status (pi))
2131 proc_init_failed (pi, "procfs_read_status failed", kill);
2132
2133 return pi;
2134 }
2135
2136 /*
2137
2138 LOCAL FUNCTION
2139
2140 create_procinfo - initialize access to a /proc entry
2141
2142 SYNOPSIS
2143
2144 struct procinfo * create_procinfo (int pid)
2145
2146 DESCRIPTION
2147
2148 Allocate a procinfo structure, open the /proc file and then set up the
2149 set of signals and faults that are to be traced. Returns a pointer to
2150 the new procinfo structure.
2151
2152 NOTES
2153
2154 If proc_init_failed ever gets called, control returns to the command
2155 processing loop via the standard error handling code.
2156
2157 */
2158
2159 static struct procinfo *
2160 create_procinfo (pid)
2161 int pid;
2162 {
2163 struct procinfo *pi;
2164 struct sig_ctl sctl;
2165 struct flt_ctl fctl;
2166
2167 pi = find_procinfo (pid, 1);
2168 if (pi != NULL)
2169 return pi; /* All done! It already exists */
2170
2171 pi = init_procinfo (pid, 1);
2172
2173 #ifndef UNIXWARE
2174 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2175 already stopped, even if they all have PR_ASYNC set. */
2176 if (!(pi->prstatus.pr_flags & PR_STOPPED))
2177 #endif
2178 if (!procfs_write_pcwstop (pi))
2179 proc_init_failed (pi, "procfs_write_pcwstop failed", 1);
2180
2181 #ifdef PROCFS_USE_READ_WRITE
2182 fctl.cmd = PCSFAULT;
2183 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
2184 proc_init_failed (pi, "PCSFAULT failed", 1);
2185 #else
2186 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
2187 proc_init_failed (pi, "PIOCSFAULT failed", 1);
2188 #endif
2189
2190 return pi;
2191 }
2192
2193 /*
2194
2195 LOCAL FUNCTION
2196
2197 procfs_exit_handler - handle entry into the _exit syscall
2198
2199 SYNOPSIS
2200
2201 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2202
2203 DESCRIPTION
2204
2205 This routine is called when an inferior process enters the _exit()
2206 system call. It continues the process, and then collects the exit
2207 status and pid which are returned in *statvalp and *rtnvalp. After
2208 that it returns non-zero to indicate that procfs_wait should wake up.
2209
2210 NOTES
2211 There is probably a better way to do this.
2212
2213 */
2214
2215 static int
2216 procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2217 struct procinfo *pi;
2218 int syscall_num;
2219 int why;
2220 int *rtnvalp;
2221 int *statvalp;
2222 {
2223 struct procinfo *temp_pi, *next_pi;
2224 struct proc_ctl pctl;
2225
2226 #ifdef UNIXWARE
2227 pctl.cmd = PCRUN;
2228 pctl.data = PRCFAULT;
2229 #else
2230 pi->prrun.pr_flags = PRCFAULT;
2231 #endif
2232
2233 #ifdef PROCFS_USE_READ_WRITE
2234 if (write (pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
2235 #else
2236 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2237 #endif
2238 perror_with_name (pi->pathname);
2239
2240 if (attach_flag)
2241 {
2242 /* Claim it exited (don't call wait). */
2243 if (info_verbose)
2244 printf_filtered ("(attached process has exited)\n");
2245 *statvalp = 0;
2246 *rtnvalp = inferior_pid;
2247 }
2248 else
2249 {
2250 *rtnvalp = wait (statvalp);
2251 if (*rtnvalp >= 0)
2252 *rtnvalp = pi->pid;
2253 }
2254
2255 /* Close ALL open proc file handles,
2256 except the one that called SYS_exit. */
2257 for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi)
2258 {
2259 next_pi = temp_pi->next;
2260 if (temp_pi == pi)
2261 continue; /* Handled below */
2262 close_proc_file (temp_pi);
2263 }
2264 return 1;
2265 }
2266
2267 /*
2268
2269 LOCAL FUNCTION
2270
2271 procfs_exec_handler - handle exit from the exec family of syscalls
2272
2273 SYNOPSIS
2274
2275 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2276
2277 DESCRIPTION
2278
2279 This routine is called when an inferior process is about to finish any
2280 of the exec() family of system calls. It pretends that we got a
2281 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2282 to tell procfs_wait to wake up.
2283
2284 NOTES
2285 This need for compatibility with ptrace is questionable. In the
2286 future, it shouldn't be necessary.
2287
2288 */
2289
2290 static int
2291 procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2292 struct procinfo *pi;
2293 int syscall_num;
2294 int why;
2295 int *rtnvalp;
2296 int *statvalp;
2297 {
2298 *statvalp = (SIGTRAP << 8) | 0177;
2299
2300 return 1;
2301 }
2302
2303 #if defined(SYS_sproc) && !defined(UNIXWARE)
2304 /* IRIX lwp creation system call */
2305
2306 /*
2307
2308 LOCAL FUNCTION
2309
2310 procfs_sproc_handler - handle exit from the sproc syscall
2311
2312 SYNOPSIS
2313
2314 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2315
2316 DESCRIPTION
2317
2318 This routine is called when an inferior process is about to finish an
2319 sproc() system call. This is the system call that IRIX uses to create
2320 a lightweight process. When the target process gets this event, we can
2321 look at rval1 to find the new child processes ID, and create a new
2322 procinfo struct from that.
2323
2324 After that, it pretends that we got a SIGTRAP, and returns non-zero
2325 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2326 woken up, sees the new process and continues it.
2327
2328 NOTES
2329 We actually never see the child exiting from sproc because we will
2330 shortly stop the child with PIOCSTOP, which is then registered as the
2331 event of interest.
2332 */
2333
2334 static int
2335 procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2336 struct procinfo *pi;
2337 int syscall_num;
2338 int why;
2339 int *rtnvalp;
2340 int *statvalp;
2341 {
2342 /* We've just detected the completion of an sproc system call. Now we need to
2343 setup a procinfo struct for this thread, and notify the thread system of the
2344 new arrival. */
2345
2346 /* If sproc failed, then nothing interesting happened. Continue the process
2347 and go back to sleep. */
2348
2349 if (pi->prstatus.pr_errno != 0)
2350 {
2351 pi->prrun.pr_flags &= PRSTEP;
2352 pi->prrun.pr_flags |= PRCFAULT;
2353
2354 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2355 perror_with_name (pi->pathname);
2356
2357 return 0;
2358 }
2359
2360 /* At this point, the new thread is stopped at it's first instruction, and
2361 the parent is stopped at the exit from sproc. */
2362
2363 /* Notify the caller of the arrival of a new thread. */
2364 create_procinfo (pi->prstatus.pr_rval1);
2365
2366 *rtnvalp = pi->prstatus.pr_rval1;
2367 *statvalp = (SIGTRAP << 8) | 0177;
2368
2369 return 1;
2370 }
2371
2372 /*
2373
2374 LOCAL FUNCTION
2375
2376 procfs_fork_handler - handle exit from the fork syscall
2377
2378 SYNOPSIS
2379
2380 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2381
2382 DESCRIPTION
2383
2384 This routine is called when an inferior process is about to finish a
2385 fork() system call. We will open up the new process, and then close
2386 it, which releases it from the clutches of the debugger.
2387
2388 After that, we continue the target process as though nothing had
2389 happened.
2390
2391 NOTES
2392 This is necessary for IRIX because we have to set PR_FORK in order
2393 to catch the creation of lwps (via sproc()). When an actual fork
2394 occurs, it becomes necessary to reset the forks debugger flags and
2395 continue it because we can't hack multiple processes yet.
2396 */
2397
2398 static int
2399 procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2400 struct procinfo *pi;
2401 int syscall_num;
2402 int why;
2403 int *rtnvalp;
2404 int *statvalp;
2405 {
2406 struct procinfo *pitemp;
2407
2408 /* At this point, we've detected the completion of a fork (or vfork) call in
2409 our child. The grandchild is also stopped because we set inherit-on-fork
2410 earlier. (Note that nobody has the grandchilds' /proc file open at this
2411 point.) We will release the grandchild from the debugger by opening it's
2412 /proc file and then closing it. Since run-on-last-close is set, the
2413 grandchild continues on its' merry way. */
2414
2415
2416 pitemp = create_procinfo (pi->prstatus.pr_rval1);
2417 if (pitemp)
2418 close_proc_file (pitemp);
2419
2420 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2421 perror_with_name (pi->pathname);
2422
2423 return 0;
2424 }
2425 #endif /* SYS_sproc && !UNIXWARE */
2426
2427 /*
2428
2429 LOCAL FUNCTION
2430
2431 procfs_set_inferior_syscall_traps - setup the syscall traps
2432
2433 SYNOPSIS
2434
2435 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2436
2437 DESCRIPTION
2438
2439 Called for each "procinfo" (process, thread, or LWP) in the
2440 inferior, to register for notification of and handlers for
2441 syscall traps in the inferior.
2442
2443 */
2444
2445 static void
2446 procfs_set_inferior_syscall_traps (pip)
2447 struct procinfo *pip;
2448 {
2449 procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
2450 procfs_exit_handler);
2451
2452 #ifndef PRFS_STOPEXEC
2453 #ifdef SYS_exec
2454 procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
2455 procfs_exec_handler);
2456 #endif
2457 #ifdef SYS_execv
2458 procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT,
2459 procfs_exec_handler);
2460 #endif
2461 #ifdef SYS_execve
2462 procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
2463 procfs_exec_handler);
2464 #endif
2465 #endif /* PRFS_STOPEXEC */
2466
2467 /* Setup traps on exit from sproc() */
2468
2469 #ifdef SYS_sproc
2470 procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT,
2471 procfs_sproc_handler);
2472 procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT,
2473 procfs_fork_handler);
2474 #ifdef SYS_vfork
2475 procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT,
2476 procfs_fork_handler);
2477 #endif
2478 /* Turn on inherit-on-fork flag so that all children of the target process
2479 start with tracing flags set. This allows us to trap lwp creation. Note
2480 that we also have to trap on fork and vfork in order to disable all tracing
2481 in the targets child processes. */
2482
2483 modify_inherit_on_fork_flag (pip->ctl_fd, 1);
2484 #endif
2485
2486 #ifdef SYS_lwp_create
2487 procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
2488 procfs_lwp_creation_handler);
2489 #endif
2490 }
2491
2492 /*
2493
2494 LOCAL FUNCTION
2495
2496 procfs_init_inferior - initialize target vector and access to a
2497 /proc entry
2498
2499 SYNOPSIS
2500
2501 int procfs_init_inferior (int pid)
2502
2503 DESCRIPTION
2504
2505 When gdb starts an inferior, this function is called in the parent
2506 process immediately after the fork. It waits for the child to stop
2507 on the return from the exec system call (the child itself takes care
2508 of ensuring that this is set up), then sets up the set of signals
2509 and faults that are to be traced. Returns the pid, which may have had
2510 the thread-id added to it.
2511
2512 NOTES
2513
2514 If proc_init_failed ever gets called, control returns to the command
2515 processing loop via the standard error handling code.
2516
2517 */
2518
2519 static int
2520 procfs_init_inferior (pid)
2521 int pid;
2522 {
2523 struct procinfo *pip;
2524
2525 push_target (&procfs_ops);
2526
2527 pip = create_procinfo (pid);
2528
2529 procfs_set_inferior_syscall_traps (pip);
2530
2531 /* create_procinfo may change the pid, so we have to update inferior_pid
2532 here before calling other gdb routines that need the right pid. */
2533
2534 pid = pip -> pid;
2535 inferior_pid = pid;
2536
2537 add_thread (pip -> pid); /* Setup initial thread */
2538
2539 #ifdef START_INFERIOR_TRAPS_EXPECTED
2540 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
2541 #else
2542 /* One trap to exec the shell, one to exec the program being debugged. */
2543 startup_inferior (2);
2544 #endif
2545
2546 return pid;
2547 }
2548
2549 /*
2550
2551 GLOBAL FUNCTION
2552
2553 procfs_notice_signals
2554
2555 SYNOPSIS
2556
2557 static void procfs_notice_signals (int pid);
2558
2559 DESCRIPTION
2560
2561 When the user changes the state of gdb's signal handling via the
2562 "handle" command, this function gets called to see if any change
2563 in the /proc interface is required. It is also called internally
2564 by other /proc interface functions to initialize the state of
2565 the traced signal set.
2566
2567 One thing it does is that signals for which the state is "nostop",
2568 "noprint", and "pass", have their trace bits reset in the pr_trace
2569 field, so that they are no longer traced. This allows them to be
2570 delivered directly to the inferior without the debugger ever being
2571 involved.
2572 */
2573
2574 static void
2575 procfs_notice_signals (pid)
2576 int pid;
2577 {
2578 struct procinfo *pi;
2579 struct sig_ctl sctl;
2580
2581 pi = find_procinfo (pid, 0);
2582
2583 #ifdef UNIXWARE
2584 premptyset (&sctl.sigset);
2585 #else
2586 sctl.sigset = pi->prrun.pr_trace;
2587 #endif
2588
2589 notice_signals (pi, &sctl);
2590
2591 #ifndef UNIXWARE
2592 pi->prrun.pr_trace = sctl.sigset;
2593 #endif
2594 }
2595
2596 static void
2597 notice_signals (pi, sctl)
2598 struct procinfo *pi;
2599 struct sig_ctl *sctl;
2600 {
2601 int signo;
2602
2603 for (signo = 0; signo < NSIG; signo++)
2604 {
2605 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
2606 signal_print_state (target_signal_from_host (signo)) == 0 &&
2607 signal_pass_state (target_signal_from_host (signo)) == 1)
2608 {
2609 prdelset (&sctl->sigset, signo);
2610 }
2611 else
2612 {
2613 praddset (&sctl->sigset, signo);
2614 }
2615 }
2616 #ifdef PROCFS_USE_READ_WRITE
2617 sctl->cmd = PCSTRACE;
2618 if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0)
2619 #else
2620 if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset))
2621 #endif
2622 {
2623 print_sys_errmsg ("PIOCSTRACE failed", errno);
2624 }
2625 }
2626
2627 /*
2628
2629 LOCAL FUNCTION
2630
2631 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2632
2633 SYNOPSIS
2634
2635 void proc_set_exec_trap (void)
2636
2637 DESCRIPTION
2638
2639 This function is called in the child process when starting up
2640 an inferior, prior to doing the exec of the actual inferior.
2641 It sets the child process's exitset to make exit from the exec
2642 system call an event of interest to stop on, and then simply
2643 returns. The child does the exec, the system call returns, and
2644 the child stops at the first instruction, ready for the gdb
2645 parent process to take control of it.
2646
2647 NOTE
2648
2649 We need to use all local variables since the child may be sharing
2650 it's data space with the parent, if vfork was used rather than
2651 fork.
2652
2653 Also note that we want to turn off the inherit-on-fork flag in
2654 the child process so that any grand-children start with all
2655 tracing flags cleared.
2656 */
2657
2658 static void
2659 proc_set_exec_trap ()
2660 {
2661 struct sys_ctl exitset;
2662 struct sys_ctl entryset;
2663 char procname[MAX_PROC_NAME_SIZE];
2664 int fd;
2665
2666 sprintf (procname, CTL_PROC_NAME_FMT, getpid ());
2667 #ifdef UNIXWARE
2668 if ((fd = open (procname, O_WRONLY)) < 0)
2669 #else
2670 if ((fd = open (procname, O_RDWR)) < 0)
2671 #endif
2672 {
2673 perror (procname);
2674 gdb_flush (gdb_stderr);
2675 _exit (127);
2676 }
2677 premptyset (&exitset.sysset);
2678 premptyset (&entryset.sysset);
2679
2680 #ifdef PRFS_STOPEXEC
2681 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2682 exits from exec system calls because of the user level loader. */
2683 {
2684 int prfs_flags;
2685
2686 if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
2687 {
2688 perror (procname);
2689 gdb_flush (gdb_stderr);
2690 _exit (127);
2691 }
2692 prfs_flags |= PRFS_STOPEXEC;
2693 if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
2694 {
2695 perror (procname);
2696 gdb_flush (gdb_stderr);
2697 _exit (127);
2698 }
2699 }
2700 #else /* PRFS_STOPEXEC */
2701 /* GW: Rationale...
2702 Not all systems with /proc have all the exec* syscalls with the same
2703 names. On the SGI, for example, there is no SYS_exec, but there
2704 *is* a SYS_execv. So, we try to account for that. */
2705
2706 #ifdef SYS_exec
2707 praddset (&exitset.sysset, SYS_exec);
2708 #endif
2709 #ifdef SYS_execve
2710 praddset (&exitset.sysset, SYS_execve);
2711 #endif
2712 #ifdef SYS_execv
2713 praddset (&exitset.sysset, SYS_execv);
2714 #endif
2715
2716 #ifdef PROCFS_USE_READ_WRITE
2717 exitset.cmd = PCSEXIT;
2718 if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0)
2719 #else
2720 if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0)
2721 #endif
2722 {
2723 perror (procname);
2724 gdb_flush (gdb_stderr);
2725 _exit (127);
2726 }
2727 #endif /* PRFS_STOPEXEC */
2728
2729 praddset (&entryset.sysset, SYS_exit);
2730
2731 #ifdef PROCFS_USE_READ_WRITE
2732 entryset.cmd = PCSENTRY;
2733 if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0)
2734 #else
2735 if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0)
2736 #endif
2737 {
2738 perror (procname);
2739 gdb_flush (gdb_stderr);
2740 _exit (126);
2741 }
2742
2743 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2744 start with tracing flags cleared. */
2745
2746 modify_inherit_on_fork_flag (fd, 0);
2747
2748 /* Turn on run-on-last-close flag so that this process will not hang
2749 if GDB goes away for some reason. */
2750
2751 modify_run_on_last_close_flag (fd, 1);
2752
2753 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2754 /* NOTE: revisit when doing thread support for UW */
2755 #ifdef PR_ASYNC
2756 {
2757 long pr_flags;
2758 struct proc_ctl pctl;
2759
2760 /* Solaris needs this to make procfs treat all threads seperately. Without
2761 this, all threads halt whenever something happens to any thread. Since
2762 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2763
2764 pr_flags = PR_ASYNC;
2765 #ifdef PROCFS_USE_READ_WRITE
2766 pctl.cmd = PCSET;
2767 pctl.data = PR_FORK|PR_ASYNC;
2768 write (fd, (char *) &pctl, sizeof (struct proc_ctl));
2769 #else
2770 ioctl (fd, PIOCSET, &pr_flags);
2771 #endif
2772 }
2773 #endif /* PR_ASYNC */
2774 #endif /* !UNIXWARE */
2775 }
2776
2777 /*
2778
2779 GLOBAL FUNCTION
2780
2781 proc_iterate_over_mappings -- call function for every mapped space
2782
2783 SYNOPSIS
2784
2785 int proc_iterate_over_mappings (int (*func)())
2786
2787 DESCRIPTION
2788
2789 Given a pointer to a function, call that function for every
2790 mapped address space, passing it an open file descriptor for
2791 the file corresponding to that mapped address space (if any)
2792 and the base address of the mapped space. Quit when we hit
2793 the end of the mappings or the function returns nonzero.
2794 */
2795
2796 #ifdef UNIXWARE
2797 int
2798 proc_iterate_over_mappings (func)
2799 int (*func) PARAMS ((int, CORE_ADDR));
2800 {
2801 int nmap;
2802 int fd;
2803 int funcstat = 0;
2804 prmap_t *prmaps;
2805 prmap_t *prmap;
2806 struct procinfo *pi;
2807 struct stat sbuf;
2808
2809 pi = current_procinfo;
2810
2811 if (fstat (pi->map_fd, &sbuf) < 0)
2812 return 0;
2813
2814 nmap = sbuf.st_size / sizeof (prmap_t);
2815 prmaps = (prmap_t *) alloca (nmap * sizeof(prmap_t));
2816 if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) &&
2817 (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) ==
2818 (nmap * sizeof (prmap_t))))
2819 {
2820 int i = 0;
2821 for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i)
2822 {
2823 char name[sizeof ("/proc/1234567890/object") +
2824 sizeof (prmap->pr_mapname)];
2825 sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname);
2826 if ((fd = open (name, O_RDONLY)) == -1)
2827 {
2828 funcstat = 1;
2829 break;
2830 }
2831 funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
2832 close (fd);
2833 }
2834 }
2835 return (funcstat);
2836 }
2837 #else /* UNIXWARE */
2838 int
2839 proc_iterate_over_mappings (func)
2840 int (*func) PARAMS ((int, CORE_ADDR));
2841 {
2842 int nmap;
2843 int fd;
2844 int funcstat = 0;
2845 struct prmap *prmaps;
2846 struct prmap *prmap;
2847 struct procinfo *pi;
2848
2849 pi = current_procinfo;
2850
2851 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
2852 {
2853 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2854 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
2855 {
2856 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
2857 {
2858 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
2859 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
2860 close (fd);
2861 }
2862 }
2863 }
2864 return (funcstat);
2865 }
2866 #endif /* UNIXWARE */
2867
2868 #if 0 /* Currently unused */
2869 /*
2870
2871 GLOBAL FUNCTION
2872
2873 proc_base_address -- find base address for segment containing address
2874
2875 SYNOPSIS
2876
2877 CORE_ADDR proc_base_address (CORE_ADDR addr)
2878
2879 DESCRIPTION
2880
2881 Given an address of a location in the inferior, find and return
2882 the base address of the mapped segment containing that address.
2883
2884 This is used for example, by the shared library support code,
2885 where we have the pc value for some location in the shared library
2886 where we are stopped, and need to know the base address of the
2887 segment containing that address.
2888 */
2889
2890 CORE_ADDR
2891 proc_base_address (addr)
2892 CORE_ADDR addr;
2893 {
2894 int nmap;
2895 struct prmap *prmaps;
2896 struct prmap *prmap;
2897 CORE_ADDR baseaddr = 0;
2898 struct procinfo *pi;
2899
2900 pi = current_procinfo;
2901
2902 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
2903 {
2904 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2905 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
2906 {
2907 for (prmap = prmaps; prmap -> pr_size; ++prmap)
2908 {
2909 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
2910 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
2911 {
2912 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
2913 break;
2914 }
2915 }
2916 }
2917 }
2918 return (baseaddr);
2919 }
2920
2921 #endif /* 0 */
2922
2923 #ifndef UNIXWARE
2924 /*
2925
2926 LOCAL FUNCTION
2927
2928 proc_address_to_fd -- return open fd for file mapped to address
2929
2930 SYNOPSIS
2931
2932 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2933
2934 DESCRIPTION
2935
2936 Given an address in the current inferior's address space, use the
2937 /proc interface to find an open file descriptor for the file that
2938 this address was mapped in from. Return -1 if there is no current
2939 inferior. Print a warning message if there is an inferior but
2940 the address corresponds to no file (IE a bogus address).
2941
2942 */
2943
2944 static int
2945 proc_address_to_fd (pi, addr, complain)
2946 struct procinfo *pi;
2947 CORE_ADDR addr;
2948 int complain;
2949 {
2950 int fd = -1;
2951
2952 if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
2953 {
2954 if (complain)
2955 {
2956 print_sys_errmsg (pi->pathname, errno);
2957 warning ("can't find mapped file for address 0x%x", addr);
2958 }
2959 }
2960 return (fd);
2961 }
2962 #endif /* !UNIXWARE */
2963
2964 /* Attach to process PID, then initialize for debugging it
2965 and wait for the trace-trap that results from attaching. */
2966
2967 static void
2968 procfs_attach (args, from_tty)
2969 char *args;
2970 int from_tty;
2971 {
2972 char *exec_file;
2973 int pid;
2974
2975 if (!args)
2976 error_no_arg ("process-id to attach");
2977
2978 pid = atoi (args);
2979
2980 if (pid == getpid()) /* Trying to masturbate? */
2981 error ("I refuse to debug myself!");
2982
2983 if (from_tty)
2984 {
2985 exec_file = (char *) get_exec_file (0);
2986
2987 if (exec_file)
2988 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
2989 else
2990 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
2991
2992 gdb_flush (gdb_stdout);
2993 }
2994
2995 inferior_pid = pid = do_attach (pid);
2996 push_target (&procfs_ops);
2997 }
2998
2999
3000 /* Take a program previously attached to and detaches it.
3001 The program resumes execution and will no longer stop
3002 on signals, etc. We'd better not have left any breakpoints
3003 in the program or it'll die when it hits one. For this
3004 to work, it may be necessary for the process to have been
3005 previously attached. It *might* work if the program was
3006 started via the normal ptrace (PTRACE_TRACEME). */
3007
3008 static void
3009 procfs_detach (args, from_tty)
3010 char *args;
3011 int from_tty;
3012 {
3013 int siggnal = 0;
3014
3015 if (from_tty)
3016 {
3017 char *exec_file = get_exec_file (0);
3018 if (exec_file == 0)
3019 exec_file = "";
3020 printf_unfiltered ("Detaching from program: %s %s\n",
3021 exec_file, target_pid_to_str (inferior_pid));
3022 gdb_flush (gdb_stdout);
3023 }
3024 if (args)
3025 siggnal = atoi (args);
3026
3027 do_detach (siggnal);
3028 inferior_pid = 0;
3029 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
3030 }
3031
3032 /* Get ready to modify the registers array. On machines which store
3033 individual registers, this doesn't need to do anything. On machines
3034 which store all the registers in one fell swoop, this makes sure
3035 that registers contains all the registers from the program being
3036 debugged. */
3037
3038 static void
3039 procfs_prepare_to_store ()
3040 {
3041 #ifdef CHILD_PREPARE_TO_STORE
3042 CHILD_PREPARE_TO_STORE ();
3043 #endif
3044 }
3045
3046 /* Print status information about what we're accessing. */
3047
3048 static void
3049 procfs_files_info (ignore)
3050 struct target_ops *ignore;
3051 {
3052 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3053 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
3054 }
3055
3056 /* ARGSUSED */
3057 static void
3058 procfs_open (arg, from_tty)
3059 char *arg;
3060 int from_tty;
3061 {
3062 error ("Use the \"run\" command to start a Unix child process.");
3063 }
3064
3065 /*
3066
3067 LOCAL FUNCTION
3068
3069 do_attach -- attach to an already existing process
3070
3071 SYNOPSIS
3072
3073 int do_attach (int pid)
3074
3075 DESCRIPTION
3076
3077 Attach to an already existing process with the specified process
3078 id. If the process is not already stopped, query whether to
3079 stop it or not.
3080
3081 NOTES
3082
3083 The option of stopping at attach time is specific to the /proc
3084 versions of gdb. Versions using ptrace force the attachee
3085 to stop. (I have changed this version to do so, too. All you
3086 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3087
3088 */
3089
3090 static int
3091 do_attach (pid)
3092 int pid;
3093 {
3094 struct procinfo *pi;
3095 struct sig_ctl sctl;
3096 struct flt_ctl fctl;
3097 int nlwp, *lwps;
3098
3099 pi = init_procinfo (pid, 0);
3100
3101 #ifdef PIOCLWPIDS
3102 nlwp = pi->prstatus.pr_nlwp;
3103 lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
3104
3105 if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
3106 {
3107 print_sys_errmsg (pi -> pathname, errno);
3108 error ("PIOCLWPIDS failed");
3109 }
3110 #else /* PIOCLWPIDS */
3111 nlwp = 1;
3112 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
3113 lwps[0] = 0;
3114 #endif
3115 for (; nlwp > 0; nlwp--, lwps++)
3116 {
3117 /* First one has already been created above. */
3118 if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
3119 pi = init_procinfo ((*lwps << 16) | pid, 0);
3120
3121 #ifdef UNIXWARE
3122 if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
3123 #else
3124 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3125 #endif
3126 {
3127 pi->was_stopped = 1;
3128 }
3129 else
3130 {
3131 pi->was_stopped = 0;
3132 if (1 || query ("Process is currently running, stop it? "))
3133 {
3134 long cmd;
3135 /* Make it run again when we close it. */
3136 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3137 #ifdef PROCFS_USE_READ_WRITE
3138 cmd = PCSTOP;
3139 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3140 #else
3141 if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
3142 #endif
3143 {
3144 print_sys_errmsg (pi->pathname, errno);
3145 close_proc_file (pi);
3146 error ("PIOCSTOP failed");
3147 }
3148 #ifdef UNIXWARE
3149 if (!procfs_read_status (pi))
3150 {
3151 print_sys_errmsg (pi->pathname, errno);
3152 close_proc_file (pi);
3153 error ("procfs_read_status failed");
3154 }
3155 #endif
3156 pi->nopass_next_sigstop = 1;
3157 }
3158 else
3159 {
3160 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3161 target_pid_to_str (pi->pid));
3162 }
3163 }
3164
3165 #ifdef PROCFS_USE_READ_WRITE
3166 fctl.cmd = PCSFAULT;
3167 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
3168 print_sys_errmsg ("PCSFAULT failed", errno);
3169 #else /* PROCFS_USE_READ_WRITE */
3170 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
3171 {
3172 print_sys_errmsg ("PIOCSFAULT failed", errno);
3173 }
3174 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
3175 {
3176 print_sys_errmsg ("PIOCSTRACE failed", errno);
3177 }
3178 add_thread (pi->pid);
3179 procfs_set_inferior_syscall_traps (pi);
3180 #endif /* PROCFS_USE_READ_WRITE */
3181 }
3182 attach_flag = 1;
3183 return (pi->pid);
3184 }
3185
3186 /*
3187
3188 LOCAL FUNCTION
3189
3190 do_detach -- detach from an attached-to process
3191
3192 SYNOPSIS
3193
3194 void do_detach (int signal)
3195
3196 DESCRIPTION
3197
3198 Detach from the current attachee.
3199
3200 If signal is non-zero, the attachee is started running again and sent
3201 the specified signal.
3202
3203 If signal is zero and the attachee was not already stopped when we
3204 attached to it, then we make it runnable again when we detach.
3205
3206 Otherwise, we query whether or not to make the attachee runnable
3207 again, since we may simply want to leave it in the state it was in
3208 when we attached.
3209
3210 We report any problems, but do not consider them errors, since we
3211 MUST detach even if some things don't seem to go right. This may not
3212 be the ideal situation. (FIXME).
3213 */
3214
3215 static void
3216 do_detach (signal)
3217 int signal;
3218 {
3219 struct procinfo *pi;
3220
3221 for (pi = procinfo_list; pi; pi = pi->next)
3222 {
3223 if (signal)
3224 {
3225 set_proc_siginfo (pi, signal);
3226 }
3227 #ifdef PROCFS_USE_READ_WRITE
3228 pi->saved_exitset.cmd = PCSEXIT;
3229 if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
3230 sizeof (struct sys_ctl)) < 0)
3231 #else
3232 if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
3233 #endif
3234 {
3235 print_sys_errmsg (pi->pathname, errno);
3236 printf_unfiltered ("PIOCSEXIT failed.\n");
3237 }
3238 #ifdef PROCFS_USE_READ_WRITE
3239 pi->saved_entryset.cmd = PCSENTRY;
3240 if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
3241 sizeof (struct sys_ctl)) < 0)
3242 #else
3243 if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
3244 #endif
3245 {
3246 print_sys_errmsg (pi->pathname, errno);
3247 printf_unfiltered ("PIOCSENTRY failed.\n");
3248 }
3249 #ifdef PROCFS_USE_READ_WRITE
3250 pi->saved_trace.cmd = PCSTRACE;
3251 if (write (pi->ctl_fd, (char *) &pi->saved_trace,
3252 sizeof (struct sig_ctl)) < 0)
3253 #else
3254 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
3255 #endif
3256 {
3257 print_sys_errmsg (pi->pathname, errno);
3258 printf_unfiltered ("PIOCSTRACE failed.\n");
3259 }
3260 #ifndef UNIXWARE
3261 if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
3262 {
3263 print_sys_errmsg (pi->pathname, errno);
3264 printf_unfiltered ("PIOSCHOLD failed.\n");
3265 }
3266 #endif
3267 #ifdef PROCFS_USE_READ_WRITE
3268 pi->saved_fltset.cmd = PCSFAULT;
3269 if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
3270 sizeof (struct flt_ctl)) < 0)
3271 #else
3272 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
3273 #endif
3274 {
3275 print_sys_errmsg (pi->pathname, errno);
3276 printf_unfiltered ("PIOCSFAULT failed.\n");
3277 }
3278 if (!procfs_read_status (pi))
3279 {
3280 print_sys_errmsg (pi->pathname, errno);
3281 printf_unfiltered ("procfs_read_status failed.\n");
3282 }
3283 else
3284 {
3285 #ifdef UNIXWARE
3286 if (signal || (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
3287 #else
3288 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
3289 #endif
3290 {
3291 long cmd;
3292 struct proc_ctl pctl;
3293
3294 if (signal || !pi->was_stopped ||
3295 query ("Was stopped when attached, make it runnable again? "))
3296 {
3297 /* Clear any pending signal if we want to detach without
3298 a signal. */
3299 if (signal == 0)
3300 set_proc_siginfo (pi, signal);
3301
3302 /* Clear any fault that might have stopped it. */
3303 #ifdef PROCFS_USE_READ_WRITE
3304 cmd = PCCFAULT;
3305 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3306 #else
3307 if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
3308 #endif
3309 {
3310 print_sys_errmsg (pi->pathname, errno);
3311 printf_unfiltered ("PIOCCFAULT failed.\n");
3312 }
3313
3314 /* Make it run again when we close it. */
3315
3316 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3317 }
3318 }
3319 }
3320 close_proc_file (pi);
3321 }
3322 attach_flag = 0;
3323 }
3324
3325 /* emulate wait() as much as possible.
3326 Wait for child to do something. Return pid of child, or -1 in case
3327 of error; store status in *OURSTATUS.
3328
3329 Not sure why we can't
3330 just use wait(), but it seems to have problems when applied to a
3331 process being controlled with the /proc interface.
3332
3333 We have a race problem here with no obvious solution. We need to let
3334 the inferior run until it stops on an event of interest, which means
3335 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3336 ioctl if the process is already stopped on something that is not an
3337 event of interest, or the call will hang indefinitely. Thus we first
3338 use PIOCSTATUS to see if the process is not stopped. If not, then we
3339 use PIOCWSTOP. But during the window between the two, if the process
3340 stops for any reason that is not an event of interest (such as a job
3341 control signal) then gdb will hang. One possible workaround is to set
3342 an alarm to wake up every minute of so and check to see if the process
3343 is still running, and if so, then reissue the PIOCWSTOP. But this is
3344 a real kludge, so has not been implemented. FIXME: investigate
3345 alternatives.
3346
3347 FIXME: Investigate why wait() seems to have problems with programs
3348 being control by /proc routines. */
3349 static int
3350 procfs_wait (pid, ourstatus)
3351 int pid;
3352 struct target_waitstatus *ourstatus;
3353 {
3354 short what;
3355 short why;
3356 int statval = 0;
3357 int checkerr = 0;
3358 int rtnval = -1;
3359 struct procinfo *pi;
3360 struct proc_ctl pctl;
3361
3362 if (pid != -1) /* Non-specific process? */
3363 pi = NULL;
3364 else
3365 for (pi = procinfo_list; pi; pi = pi->next)
3366 if (pi->had_event)
3367 break;
3368
3369 if (!pi)
3370 {
3371 wait_again:
3372
3373 if (pi)
3374 pi->had_event = 0;
3375
3376 pi = wait_fd ();
3377 }
3378
3379 if (pid != -1)
3380 for (pi = procinfo_list; pi; pi = pi->next)
3381 if (pi->pid == pid && pi->had_event)
3382 break;
3383
3384 if (!pi && !checkerr)
3385 goto wait_again;
3386
3387 #ifdef UNIXWARE
3388 if (!checkerr && !(pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
3389 #else
3390 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
3391 #endif
3392 {
3393 if (!procfs_write_pcwstop (pi))
3394 {
3395 checkerr++;
3396 }
3397 }
3398 if (checkerr)
3399 {
3400 if (errno == ENOENT)
3401 {
3402 /* XXX Fixme -- what to do if attached? Can't call wait... */
3403 rtnval = wait (&statval);
3404 if ((rtnval) != (PIDGET (inferior_pid)))
3405 {
3406 print_sys_errmsg (pi->pathname, errno);
3407 error ("procfs_wait: wait failed, returned %d", rtnval);
3408 /* NOTREACHED */
3409 }
3410 }
3411 else
3412 {
3413 print_sys_errmsg (pi->pathname, errno);
3414 error ("PIOCSTATUS or PIOCWSTOP failed.");
3415 /* NOTREACHED */
3416 }
3417 }
3418 #ifdef UNIXWARE
3419 else if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
3420 #else
3421 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3422 #endif
3423 {
3424 #ifdef UNIXWARE
3425 rtnval = pi->prstatus.pr_pid;
3426 why = pi->prstatus.pr_lwp.pr_why;
3427 what = pi->prstatus.pr_lwp.pr_what;
3428 #else
3429 rtnval = pi->pid;
3430 why = pi->prstatus.pr_why;
3431 what = pi->prstatus.pr_what;
3432 #endif
3433
3434 switch (why)
3435 {
3436 case PR_SIGNALLED:
3437 statval = (what << 8) | 0177;
3438 break;
3439 case PR_SYSENTRY:
3440 case PR_SYSEXIT:
3441 {
3442 int i;
3443 int found_handler = 0;
3444
3445 for (i = 0; i < pi->num_syscall_handlers; i++)
3446 if (pi->syscall_handlers[i].syscall_num == what)
3447 {
3448 found_handler = 1;
3449 if (!pi->syscall_handlers[i].func (pi, what, why,
3450 &rtnval, &statval))
3451 goto wait_again;
3452
3453 break;
3454 }
3455
3456 if (!found_handler)
3457 if (why == PR_SYSENTRY)
3458 error ("PR_SYSENTRY, unhandled system call %d", what);
3459 else
3460 error ("PR_SYSEXIT, unhandled system call %d", what);
3461 }
3462 break;
3463 case PR_REQUESTED:
3464 statval = (SIGSTOP << 8) | 0177;
3465 break;
3466 case PR_JOBCONTROL:
3467 statval = (what << 8) | 0177;
3468 break;
3469 case PR_FAULTED:
3470 switch (what)
3471 {
3472 #ifdef FLTWATCH
3473 case FLTWATCH:
3474 statval = (SIGTRAP << 8) | 0177;
3475 break;
3476 #endif
3477 #ifdef FLTKWATCH
3478 case FLTKWATCH:
3479 statval = (SIGTRAP << 8) | 0177;
3480 break;
3481 #endif
3482 #ifndef FAULTED_USE_SIGINFO
3483 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3484 Solaris fills in si_signo. I'm not sure about others. */
3485 case FLTPRIV:
3486 case FLTILL:
3487 statval = (SIGILL << 8) | 0177;
3488 break;
3489 case FLTBPT:
3490 case FLTTRACE:
3491 statval = (SIGTRAP << 8) | 0177;
3492 break;
3493 case FLTSTACK:
3494 case FLTACCESS:
3495 case FLTBOUNDS:
3496 statval = (SIGSEGV << 8) | 0177;
3497 break;
3498 case FLTIOVF:
3499 case FLTIZDIV:
3500 case FLTFPE:
3501 statval = (SIGFPE << 8) | 0177;
3502 break;
3503 case FLTPAGE: /* Recoverable page fault */
3504 #endif /* not FAULTED_USE_SIGINFO */
3505 default:
3506 /* Use the signal which the kernel assigns. This is better than
3507 trying to second-guess it from the fault. In fact, I suspect
3508 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3509 #ifdef UNIXWARE
3510 statval = ((pi->prstatus.pr_lwp.pr_info.si_signo) << 8) | 0177;
3511 #else
3512 statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
3513 #endif
3514 break;
3515 }
3516 break;
3517 default:
3518 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
3519 }
3520 /* Stop all the other threads when any of them stops. */
3521
3522 {
3523 struct procinfo *procinfo, *next_pi;
3524
3525 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3526 {
3527 next_pi = procinfo->next;
3528 if (!procinfo->had_event)
3529 {
3530 #ifdef PROCFS_USE_READ_WRITE
3531 long cmd = PCSTOP;
3532 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3533 {
3534 print_sys_errmsg (procinfo->pathname, errno);
3535 error ("PCSTOP failed");
3536 }
3537 #else
3538 /* A bug in Solaris (2.5) causes us to hang when trying to
3539 stop a stopped process. So, we have to check first in
3540 order to avoid the hang. */
3541 if (!procfs_read_status (procinfo))
3542 {
3543 /* The LWP has apparently terminated. */
3544 if (info_verbose)
3545 printf_filtered ("LWP %d doesn't respond.\n",
3546 (procinfo->pid >> 16) & 0xffff);
3547 close_proc_file (procinfo);
3548 continue;
3549 }
3550
3551 if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
3552 if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
3553 < 0)
3554 {
3555 print_sys_errmsg (procinfo->pathname, errno);
3556 warning ("PIOCSTOP failed");
3557 }
3558 #endif
3559 }
3560 }
3561 }
3562 }
3563 else
3564 {
3565 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3566 #ifdef UNIXWARE
3567 pi->prstatus.pr_lwp.pr_flags);
3568 #else
3569 pi->prstatus.pr_flags);
3570 #endif
3571 }
3572
3573 store_waitstatus (ourstatus, statval);
3574
3575 if (rtnval == -1) /* No more children to wait for */
3576 {
3577 warning ("Child process unexpectedly missing");
3578 /* Claim it exited with unknown signal. */
3579 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3580 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
3581 return rtnval;
3582 }
3583
3584 pi->had_event = 0; /* Indicate that we've seen this one */
3585 return (rtnval);
3586 }
3587
3588 /*
3589
3590 LOCAL FUNCTION
3591
3592 set_proc_siginfo - set a process's current signal info
3593
3594 SYNOPSIS
3595
3596 void set_proc_siginfo (struct procinfo *pip, int signo);
3597
3598 DESCRIPTION
3599
3600 Given a pointer to a process info struct in PIP and a signal number
3601 in SIGNO, set the process's current signal and its associated signal
3602 information. The signal will be delivered to the process immediately
3603 after execution is resumed, even if it is being held. In addition,
3604 this particular delivery will not cause another PR_SIGNALLED stop
3605 even if the signal is being traced.
3606
3607 If we are not delivering the same signal that the prstatus siginfo
3608 struct contains information about, then synthesize a siginfo struct
3609 to match the signal we are doing to deliver, make it of the type
3610 "generated by a user process", and send this synthesized copy. When
3611 used to set the inferior's signal state, this will be required if we
3612 are not currently stopped because of a traced signal, or if we decide
3613 to continue with a different signal.
3614
3615 Note that when continuing the inferior from a stop due to receipt
3616 of a traced signal, we either have set PRCSIG to clear the existing
3617 signal, or we have to call this function to do a PIOCSSIG with either
3618 the existing siginfo struct from pr_info, or one we have synthesized
3619 appropriately for the signal we want to deliver. Otherwise if the
3620 signal is still being traced, the inferior will immediately stop
3621 again.
3622
3623 See siginfo(5) for more details.
3624 */
3625
3626 static void
3627 set_proc_siginfo (pip, signo)
3628 struct procinfo *pip;
3629 int signo;
3630 {
3631 struct siginfo newsiginfo;
3632 struct siginfo *sip;
3633 struct sigi_ctl sictl;
3634
3635 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3636 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3637 receives a PIOCSSIG with a signal identical to the current signal,
3638 it messes up the current signal. Work around the kernel bug. */
3639 #ifdef UNIXWARE
3640 if (signo == pip -> prstatus.pr_lwp.pr_cursig)
3641 #else
3642 if (signo == pip -> prstatus.pr_cursig)
3643 #endif
3644 return;
3645 #endif
3646
3647 #ifdef UNIXWARE
3648 if (signo == pip->prstatus.pr_lwp.pr_info.si_signo)
3649 {
3650 memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info,
3651 sizeof (siginfo_t));
3652 }
3653 #else
3654 if (signo == pip -> prstatus.pr_info.si_signo)
3655 {
3656 sip = &pip -> prstatus.pr_info;
3657 }
3658 #endif
3659 else
3660 {
3661 #ifdef UNIXWARE
3662 siginfo_t *sip = &sictl.siginfo;
3663 memset ((char *) sip, 0, sizeof (siginfo_t));
3664 #else
3665 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
3666 sip = &newsiginfo;
3667 #endif
3668 sip -> si_signo = signo;
3669 sip -> si_code = 0;
3670 sip -> si_errno = 0;
3671 sip -> si_pid = getpid ();
3672 sip -> si_uid = getuid ();
3673 }
3674 #ifdef PROCFS_USE_READ_WRITE
3675 sictl.cmd = PCSSIG;
3676 if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0)
3677 #else
3678 if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0)
3679 #endif
3680 {
3681 print_sys_errmsg (pip -> pathname, errno);
3682 warning ("PIOCSSIG failed");
3683 }
3684 }
3685
3686 /* Resume execution of process PID. If STEP is nozero, then
3687 just single step it. If SIGNAL is nonzero, restart it with that
3688 signal activated. */
3689
3690 static void
3691 procfs_resume (pid, step, signo)
3692 int pid;
3693 int step;
3694 enum target_signal signo;
3695 {
3696 int signal_to_pass;
3697 struct procinfo *pi, *procinfo, *next_pi;
3698 struct proc_ctl pctl;
3699
3700 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3701
3702 errno = 0;
3703 #ifdef UNIXWARE
3704 pctl.cmd = PCRUN;
3705 pctl.data = PRCFAULT;
3706 #else
3707 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
3708 #endif
3709
3710 #if 0
3711 /* It should not be necessary. If the user explicitly changes the value,
3712 value_assign calls write_register_bytes, which writes it. */
3713 /* It may not be absolutely necessary to specify the PC value for
3714 restarting, but to be safe we use the value that gdb considers
3715 to be current. One case where this might be necessary is if the
3716 user explicitly changes the PC value that gdb considers to be
3717 current. FIXME: Investigate if this is necessary or not. */
3718
3719 #ifdef PRSVADDR_BROKEN
3720 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3721 place to put nPC. In fact, if you use this, nPC seems to be set to some
3722 random garbage. We have to rely on the fact that PC and nPC have been
3723 written previously via PIOCSREG during a register flush. */
3724
3725 pi->prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
3726 pi->prrun.pr_flags != PRSVADDR;
3727 #endif
3728 #endif
3729
3730 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
3731 /* When attaching to a child process, if we forced it to stop with
3732 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3733 Upon resuming the first time after such a stop, we explicitly
3734 inhibit sending it another SIGSTOP, which would be the normal
3735 result of default signal handling. One potential drawback to
3736 this is that we will also ignore any attempt to by the user
3737 to explicitly continue after the attach with a SIGSTOP. Ultimately
3738 this problem should be dealt with by making the routines that
3739 deal with the inferior a little smarter, and possibly even allow
3740 an inferior to continue running at the same time as gdb. (FIXME?) */
3741 signal_to_pass = 0;
3742 else if (signo == TARGET_SIGNAL_TSTP
3743 #ifdef UNIXWARE
3744 && pi->prstatus.pr_lwp.pr_cursig == SIGTSTP
3745 && pi->prstatus.pr_lwp.pr_action.sa_handler == SIG_DFL
3746 #else
3747 && pi->prstatus.pr_cursig == SIGTSTP
3748 && pi->prstatus.pr_action.sa_handler == SIG_DFL
3749 #endif
3750 )
3751
3752 /* We are about to pass the inferior a SIGTSTP whose action is
3753 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3754 (notifying the parent via wait()), and then keep going from the
3755 same place when the parent is ready for you to keep going. So
3756 under the debugger, it should do nothing (as if the program had
3757 been stopped and then later resumed. Under ptrace, this
3758 happens for us, but under /proc, the system obligingly stops
3759 the process, and wait_for_inferior would have no way of
3760 distinguishing that type of stop (which indicates that we
3761 should just start it again), with a stop due to the pr_trace
3762 field of the prrun_t struct.
3763
3764 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3765 because the handler needs to get executed. */
3766 signal_to_pass = 0;
3767 else
3768 signal_to_pass = target_signal_to_host (signo);
3769
3770 if (signal_to_pass)
3771 {
3772 set_proc_siginfo (pi, signal_to_pass);
3773 }
3774 else
3775 {
3776 #ifdef UNIXWARE
3777 pctl.data |= PRCSIG;
3778 #else
3779 pi->prrun.pr_flags |= PRCSIG;
3780 #endif
3781 }
3782 pi->nopass_next_sigstop = 0;
3783 if (step)
3784 {
3785 #ifdef UNIXWARE
3786 pctl.data |= PRSTEP;
3787 #else
3788 pi->prrun.pr_flags |= PRSTEP;
3789 #endif
3790 }
3791 pi->had_event = 0;
3792 /* Don't try to start a process unless it's stopped on an
3793 `event of interest'. Doing so will cause errors. */
3794
3795 if (!procfs_read_status (pi))
3796 {
3797 /* The LWP has apparently terminated. */
3798 if (info_verbose)
3799 printf_filtered ("LWP %d doesn't respond.\n",
3800 (pi->pid >> 16) & 0xffff);
3801 close_proc_file (pi);
3802 }
3803 else
3804 {
3805 #ifdef PROCFS_USE_READ_WRITE
3806 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
3807 #else
3808 if ((pi->prstatus.pr_flags & PR_ISTOP)
3809 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
3810 #endif
3811 {
3812 /* The LWP has apparently terminated. */
3813 if (info_verbose)
3814 printf_filtered ("LWP %d doesn't respond.\n",
3815 (pi->pid >> 16) & 0xffff);
3816 close_proc_file (pi);
3817 }
3818 }
3819
3820 /* Continue all the other threads that haven't had an event of interest.
3821 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3822 set by do_attach, and means this is the first resume after an attach.
3823 All threads were CSTOP'd by do_attach, and should be resumed now. */
3824
3825 if (pid == -1)
3826 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3827 {
3828 next_pi = procinfo->next;
3829 if (pi != procinfo)
3830 if (!procinfo->had_event ||
3831 (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
3832 {
3833 procinfo->had_event = procinfo->nopass_next_sigstop = 0;
3834 #ifdef PROCFS_USE_READ_WRITE
3835 pctl.data = PRCFAULT | PRCSIG;
3836 if (write (procinfo->ctl_fd, (char *) &pctl,
3837 sizeof (struct proc_ctl)) < 0)
3838 {
3839 if (!procfs_read_status (procinfo))
3840 fprintf_unfiltered(gdb_stderr,
3841 "procfs_read_status failed, errno=%d\n",
3842 errno);
3843 print_sys_errmsg (procinfo->pathname, errno);
3844 error ("PCRUN failed");
3845 }
3846 #else
3847 procinfo->prrun.pr_flags &= PRSTEP;
3848 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
3849 if (!procfs_read_status (procinfo))
3850 {
3851 /* The LWP has apparently terminated. */
3852 if (info_verbose)
3853 printf_filtered ("LWP %d doesn't respond.\n",
3854 (procinfo->pid >> 16) & 0xffff);
3855 close_proc_file (procinfo);
3856 continue;
3857 }
3858
3859 /* Don't try to start a process unless it's stopped on an
3860 `event of interest'. Doing so will cause errors. */
3861
3862 if ((procinfo->prstatus.pr_flags & PR_ISTOP)
3863 && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
3864 {
3865 if (!procfs_read_status (procinfo))
3866 fprintf_unfiltered(gdb_stderr,
3867 "procfs_read_status failed, errno=%d\n",
3868 errno);
3869 print_sys_errmsg (procinfo->pathname, errno);
3870 warning ("PIOCRUN failed");
3871 }
3872 #endif
3873 }
3874 procfs_read_status (procinfo);
3875 }
3876 }
3877
3878 /*
3879
3880 LOCAL FUNCTION
3881
3882 procfs_fetch_registers -- fetch current registers from inferior
3883
3884 SYNOPSIS
3885
3886 void procfs_fetch_registers (int regno)
3887
3888 DESCRIPTION
3889
3890 Read the current values of the inferior's registers, both the
3891 general register set and floating point registers (if supported)
3892 and update gdb's idea of their current values.
3893
3894 */
3895
3896 static void
3897 procfs_fetch_registers (regno)
3898 int regno;
3899 {
3900 struct procinfo *pi;
3901
3902 pi = current_procinfo;
3903
3904 #ifdef UNIXWARE
3905 if (procfs_read_status (pi))
3906 {
3907 supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
3908 #if defined (FP0_REGNUM)
3909 supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs);
3910 #endif
3911 }
3912 #else /* UNIXWARE */
3913 if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1)
3914 {
3915 supply_gregset (&pi->gregset.gregset);
3916 }
3917 #if defined (FP0_REGNUM)
3918 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1)
3919 {
3920 supply_fpregset (&pi->fpregset.fpregset);
3921 }
3922 #endif
3923 #endif /* UNIXWARE */
3924 }
3925
3926 /*
3927
3928 LOCAL FUNCTION
3929
3930 proc_init_failed - called when /proc access initialization fails
3931 fails
3932
3933 SYNOPSIS
3934
3935 static void proc_init_failed (struct procinfo *pi,
3936 char *why, int kill_p)
3937
3938 DESCRIPTION
3939
3940 This function is called whenever initialization of access to a /proc
3941 entry fails. It prints a suitable error message, does some cleanup,
3942 and then invokes the standard error processing routine which dumps
3943 us back into the command loop. If KILL_P is true, sends SIGKILL.
3944 */
3945
3946 static void
3947 proc_init_failed (pi, why, kill_p)
3948 struct procinfo *pi;
3949 char *why;
3950 int kill_p;
3951 {
3952 print_sys_errmsg (pi->pathname, errno);
3953 if (kill_p)
3954 kill (pi->pid, SIGKILL);
3955 close_proc_file (pi);
3956 error (why);
3957 /* NOTREACHED */
3958 }
3959
3960 /*
3961
3962 LOCAL FUNCTION
3963
3964 close_proc_file - close any currently open /proc entry
3965
3966 SYNOPSIS
3967
3968 static void close_proc_file (struct procinfo *pip)
3969
3970 DESCRIPTION
3971
3972 Close any currently open /proc entry and mark the process information
3973 entry as invalid. In order to ensure that we don't try to reuse any
3974 stale information, the pid, fd, and pathnames are explicitly
3975 invalidated, which may be overkill.
3976
3977 */
3978
3979 static void
3980 close_proc_file (pip)
3981 struct procinfo *pip;
3982 {
3983 struct procinfo *procinfo;
3984
3985 delete_thread (pip->pid); /* remove thread from GDB's thread list */
3986 remove_fd (pip); /* Remove fd from poll/select list */
3987
3988 close (pip->ctl_fd);
3989 #ifdef HAVE_MULTIPLE_PROC_FDS
3990 close (pip->as_fd);
3991 close (pip->status_fd);
3992 close (pip->map_fd);
3993 #endif
3994
3995 free (pip -> pathname);
3996
3997 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
3998
3999 if (procinfo_list == pip)
4000 procinfo_list = pip->next;
4001 else
4002 {
4003 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
4004 {
4005 if (procinfo->next == pip)
4006 {
4007 procinfo->next = pip->next;
4008 break;
4009 }
4010 }
4011 free (pip);
4012 }
4013 }
4014
4015 /*
4016
4017 LOCAL FUNCTION
4018
4019 open_proc_file - open a /proc entry for a given process id
4020
4021 SYNOPSIS
4022
4023 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4024
4025 DESCRIPTION
4026
4027 Given a process id and a mode, close the existing open /proc
4028 entry (if any) and open one for the new process id, in the
4029 specified mode. Once it is open, then mark the local process
4030 information structure as valid, which guarantees that the pid,
4031 fd, and pathname fields match an open /proc entry. Returns
4032 zero if the open fails, nonzero otherwise.
4033
4034 Note that the pathname is left intact, even when the open fails,
4035 so that callers can use it to construct meaningful error messages
4036 rather than just "file open failed".
4037
4038 Note that for Solaris, the process-id also includes an LWP-id, so we
4039 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4040 then we will ask the kernel what it is and add it to the pid. Hence,
4041 the pid can be changed by us.
4042 */
4043
4044 static int
4045 open_proc_file (pid, pip, mode, control)
4046 int pid;
4047 struct procinfo *pip;
4048 int mode;
4049 int control;
4050 {
4051 int tmp, tmpfd;
4052
4053 pip -> next = NULL;
4054 pip -> had_event = 0;
4055 pip -> pathname = xmalloc (MAX_PROC_NAME_SIZE);
4056 pip -> pid = pid;
4057
4058 #ifndef PIOCOPENLWP
4059 tmp = pid;
4060 #else
4061 tmp = pid & 0xffff;
4062 #endif
4063
4064 #ifdef HAVE_MULTIPLE_PROC_FDS
4065 sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp);
4066 if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0)
4067 {
4068 return 0;
4069 }
4070
4071 sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp);
4072 if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0)
4073 {
4074 close (pip->status_fd);
4075 return 0;
4076 }
4077
4078 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4079 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4080 {
4081 close (pip->status_fd);
4082 close (pip->as_fd);
4083 return 0;
4084 }
4085
4086 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4087 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4088 {
4089 close (pip->status_fd);
4090 close (pip->as_fd);
4091 return 0;
4092 }
4093
4094 if (control)
4095 {
4096 sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
4097 if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0)
4098 {
4099 close (pip->status_fd);
4100 close (pip->as_fd);
4101 close (pip->map_fd);
4102 return 0;
4103 }
4104 }
4105
4106 #else /* HAVE_MULTIPLE_PROC_FDS */
4107 sprintf (pip -> pathname, CTL_PROC_NAME_FMT, tmp);
4108
4109 if ((tmpfd = open (pip -> pathname, mode)) < 0)
4110 return 0;
4111
4112 #ifndef PIOCOPENLWP
4113 pip -> ctl_fd = tmpfd;
4114 pip -> as_fd = tmpfd;
4115 pip -> map_fd = tmpfd;
4116 pip -> status_fd = tmpfd;
4117 #else
4118 tmp = (pid >> 16) & 0xffff; /* Extract thread id */
4119
4120 if (tmp == 0)
4121 { /* Don't know thread id yet */
4122 if (ioctl (tmpfd, PIOCSTATUS, &pip -> prstatus) < 0)
4123 {
4124 print_sys_errmsg (pip -> pathname, errno);
4125 close (tmpfd);
4126 error ("open_proc_file: PIOCSTATUS failed");
4127 }
4128
4129 tmp = pip -> prstatus.pr_who; /* Get thread id from prstatus_t */
4130 pip -> pid = (tmp << 16) | pid; /* Update pip */
4131 }
4132
4133 if ((pip -> ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0)
4134 {
4135 close (tmpfd);
4136 return 0;
4137 }
4138
4139 #ifdef PIOCSET /* New method */
4140 {
4141 long pr_flags;
4142 pr_flags = PR_ASYNC;
4143 ioctl (pip -> ctl_fd, PIOCSET, &pr_flags);
4144 }
4145 #endif
4146
4147 /* keep extra fds in sync */
4148 pip->as_fd = pip->ctl_fd;
4149 pip->map_fd = pip->ctl_fd;
4150 pip->status_fd = pip->ctl_fd;
4151
4152 close (tmpfd); /* All done with main pid */
4153 #endif /* PIOCOPENLWP */
4154
4155 #endif /* HAVE_MULTIPLE_PROC_FDS */
4156
4157 return 1;
4158 }
4159
4160 static char *
4161 mappingflags (flags)
4162 long flags;
4163 {
4164 static char asciiflags[8];
4165
4166 strcpy (asciiflags, "-------");
4167 #if defined (MA_PHYS)
4168 if (flags & MA_PHYS) asciiflags[0] = 'd';
4169 #endif
4170 if (flags & MA_STACK) asciiflags[1] = 's';
4171 if (flags & MA_BREAK) asciiflags[2] = 'b';
4172 if (flags & MA_SHARED) asciiflags[3] = 's';
4173 if (flags & MA_READ) asciiflags[4] = 'r';
4174 if (flags & MA_WRITE) asciiflags[5] = 'w';
4175 if (flags & MA_EXEC) asciiflags[6] = 'x';
4176 return (asciiflags);
4177 }
4178
4179 static void
4180 info_proc_flags (pip, summary)
4181 struct procinfo *pip;
4182 int summary;
4183 {
4184 struct trans *transp;
4185 #ifdef UNIXWARE
4186 long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags;
4187 #else
4188 long flags = pip->prstatus.pr_flags;
4189 #endif
4190
4191 printf_filtered ("%-32s", "Process status flags:");
4192 if (!summary)
4193 {
4194 printf_filtered ("\n\n");
4195 }
4196 for (transp = pr_flag_table; transp -> name != NULL; transp++)
4197 {
4198 if (flags & transp -> value)
4199 {
4200 if (summary)
4201 {
4202 printf_filtered ("%s ", transp -> name);
4203 }
4204 else
4205 {
4206 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
4207 }
4208 }
4209 }
4210 printf_filtered ("\n");
4211 }
4212
4213 static void
4214 info_proc_stop (pip, summary)
4215 struct procinfo *pip;
4216 int summary;
4217 {
4218 struct trans *transp;
4219 int why;
4220 int what;
4221
4222 #ifdef UNIXWARE
4223 why = pip -> prstatus.pr_lwp.pr_why;
4224 what = pip -> prstatus.pr_lwp.pr_what;
4225 #else
4226 why = pip -> prstatus.pr_why;
4227 what = pip -> prstatus.pr_what;
4228 #endif
4229
4230 #ifdef UNIXWARE
4231 if (pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED)
4232 #else
4233 if (pip -> prstatus.pr_flags & PR_STOPPED)
4234 #endif
4235 {
4236 printf_filtered ("%-32s", "Reason for stopping:");
4237 if (!summary)
4238 {
4239 printf_filtered ("\n\n");
4240 }
4241 for (transp = pr_why_table; transp -> name != NULL; transp++)
4242 {
4243 if (why == transp -> value)
4244 {
4245 if (summary)
4246 {
4247 printf_filtered ("%s ", transp -> name);
4248 }
4249 else
4250 {
4251 printf_filtered ("\t%-16s %s.\n",
4252 transp -> name, transp -> desc);
4253 }
4254 break;
4255 }
4256 }
4257
4258 /* Use the pr_why field to determine what the pr_what field means, and
4259 print more information. */
4260
4261 switch (why)
4262 {
4263 case PR_REQUESTED:
4264 /* pr_what is unused for this case */
4265 break;
4266 case PR_JOBCONTROL:
4267 case PR_SIGNALLED:
4268 if (summary)
4269 {
4270 printf_filtered ("%s ", signalname (what));
4271 }
4272 else
4273 {
4274 printf_filtered ("\t%-16s %s.\n", signalname (what),
4275 safe_strsignal (what));
4276 }
4277 break;
4278 case PR_SYSENTRY:
4279 if (summary)
4280 {
4281 printf_filtered ("%s ", syscallname (what));
4282 }
4283 else
4284 {
4285 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4286 "Entered this system call");
4287 }
4288 break;
4289 case PR_SYSEXIT:
4290 if (summary)
4291 {
4292 printf_filtered ("%s ", syscallname (what));
4293 }
4294 else
4295 {
4296 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4297 "Returned from this system call");
4298 }
4299 break;
4300 case PR_FAULTED:
4301 if (summary)
4302 {
4303 printf_filtered ("%s ",
4304 lookupname (faults_table, what, "fault"));
4305 }
4306 else
4307 {
4308 printf_filtered ("\t%-16s %s.\n",
4309 lookupname (faults_table, what, "fault"),
4310 lookupdesc (faults_table, what));
4311 }
4312 break;
4313 }
4314 printf_filtered ("\n");
4315 }
4316 }
4317
4318 static void
4319 info_proc_siginfo (pip, summary)
4320 struct procinfo *pip;
4321 int summary;
4322 {
4323 struct siginfo *sip;
4324
4325 #ifdef UNIXWARE
4326 if ((pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED) &&
4327 (pip -> prstatus.pr_lwp.pr_why == PR_SIGNALLED ||
4328 pip -> prstatus.pr_lwp.pr_why == PR_FAULTED))
4329 #else
4330 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
4331 (pip -> prstatus.pr_why == PR_SIGNALLED ||
4332 pip -> prstatus.pr_why == PR_FAULTED))
4333 #endif
4334 {
4335 printf_filtered ("%-32s", "Additional signal/fault info:");
4336 #ifdef UNIXWARE
4337 sip = &pip -> prstatus.pr_lwp.pr_info;
4338 #else
4339 sip = &pip -> prstatus.pr_info;
4340 #endif
4341 if (summary)
4342 {
4343 printf_filtered ("%s ", signalname (sip -> si_signo));
4344 if (sip -> si_errno > 0)
4345 {
4346 printf_filtered ("%s ", errnoname (sip -> si_errno));
4347 }
4348 if (sip -> si_code <= 0)
4349 {
4350 printf_filtered ("sent by %s, uid %d ",
4351 target_pid_to_str (sip -> si_pid),
4352 sip -> si_uid);
4353 }
4354 else
4355 {
4356 printf_filtered ("%s ", sigcodename (sip));
4357 if ((sip -> si_signo == SIGILL) ||
4358 (sip -> si_signo == SIGFPE) ||
4359 (sip -> si_signo == SIGSEGV) ||
4360 (sip -> si_signo == SIGBUS))
4361 {
4362 printf_filtered ("addr=%#lx ",
4363 (unsigned long) sip -> si_addr);
4364 }
4365 else if ((sip -> si_signo == SIGCHLD))
4366 {
4367 printf_filtered ("child %s, status %u ",
4368 target_pid_to_str (sip -> si_pid),
4369 sip -> si_status);
4370 }
4371 else if ((sip -> si_signo == SIGPOLL))
4372 {
4373 printf_filtered ("band %u ", sip -> si_band);
4374 }
4375 }
4376 }
4377 else
4378 {
4379 printf_filtered ("\n\n");
4380 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
4381 safe_strsignal (sip -> si_signo));
4382 if (sip -> si_errno > 0)
4383 {
4384 printf_filtered ("\t%-16s %s.\n",
4385 errnoname (sip -> si_errno),
4386 safe_strerror (sip -> si_errno));
4387 }
4388 if (sip -> si_code <= 0)
4389 {
4390 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
4391 "PID of process sending signal");
4392 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
4393 "UID of process sending signal");
4394 }
4395 else
4396 {
4397 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
4398 sigcodedesc (sip));
4399 if ((sip -> si_signo == SIGILL) ||
4400 (sip -> si_signo == SIGFPE))
4401 {
4402 printf_filtered ("\t%#-16lx %s.\n",
4403 (unsigned long) sip -> si_addr,
4404 "Address of faulting instruction");
4405 }
4406 else if ((sip -> si_signo == SIGSEGV) ||
4407 (sip -> si_signo == SIGBUS))
4408 {
4409 printf_filtered ("\t%#-16lx %s.\n",
4410 (unsigned long) sip -> si_addr,
4411 "Address of faulting memory reference");
4412 }
4413 else if ((sip -> si_signo == SIGCHLD))
4414 {
4415 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
4416 "Child process ID");
4417 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
4418 "Child process exit value or signal");
4419 }
4420 else if ((sip -> si_signo == SIGPOLL))
4421 {
4422 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
4423 "Band event for POLL_{IN,OUT,MSG}");
4424 }
4425 }
4426 }
4427 printf_filtered ("\n");
4428 }
4429 }
4430
4431 static void
4432 info_proc_syscalls (pip, summary)
4433 struct procinfo *pip;
4434 int summary;
4435 {
4436 int syscallnum;
4437
4438 if (!summary)
4439 {
4440
4441 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4442 if (pip -> prstatus.pr_flags & PR_ASLEEP)
4443 {
4444 int syscallnum = pip -> prstatus.pr_reg[R_D0];
4445 if (summary)
4446 {
4447 printf_filtered ("%-32s", "Sleeping in system call:");
4448 printf_filtered ("%s", syscallname (syscallnum));
4449 }
4450 else
4451 {
4452 printf_filtered ("Sleeping in system call '%s'.\n",
4453 syscallname (syscallnum));
4454 }
4455 }
4456 #endif
4457
4458 #ifndef UNIXWARE
4459 if (ioctl (pip -> ctl_fd, PIOCGENTRY, &pip -> entryset) < 0)
4460 {
4461 print_sys_errmsg (pip -> pathname, errno);
4462 error ("PIOCGENTRY failed");
4463 }
4464
4465 if (ioctl (pip -> ctl_fd, PIOCGEXIT, &pip -> exitset) < 0)
4466 {
4467 print_sys_errmsg (pip -> pathname, errno);
4468 error ("PIOCGEXIT failed");
4469 }
4470 #endif
4471
4472 printf_filtered ("System call tracing information:\n\n");
4473
4474 printf_filtered ("\t%-12s %-8s %-8s\n",
4475 "System call",
4476 "Entry",
4477 "Exit");
4478 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
4479 {
4480 QUIT;
4481 if (syscall_table[syscallnum] != NULL)
4482 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
4483 else
4484 printf_filtered ("\t%-12d ", syscallnum);
4485
4486 #ifdef UNIXWARE
4487 printf_filtered ("%-8s ",
4488 prismember (&pip->prstatus.pr_sysentry, syscallnum)
4489 ? "on" : "off");
4490 printf_filtered ("%-8s ",
4491 prismember (&pip->prstatus.pr_sysexit, syscallnum)
4492 ? "on" : "off");
4493 #else
4494 printf_filtered ("%-8s ",
4495 prismember (&pip -> entryset, syscallnum)
4496 ? "on" : "off");
4497 printf_filtered ("%-8s ",
4498 prismember (&pip -> exitset, syscallnum)
4499 ? "on" : "off");
4500 #endif
4501 printf_filtered ("\n");
4502 }
4503 printf_filtered ("\n");
4504 }
4505 }
4506
4507 static char *
4508 signalname (signo)
4509 int signo;
4510 {
4511 const char *name;
4512 static char locbuf[32];
4513
4514 name = strsigno (signo);
4515 if (name == NULL)
4516 {
4517 sprintf (locbuf, "Signal %d", signo);
4518 }
4519 else
4520 {
4521 sprintf (locbuf, "%s (%d)", name, signo);
4522 }
4523 return (locbuf);
4524 }
4525
4526 static char *
4527 errnoname (errnum)
4528 int errnum;
4529 {
4530 const char *name;
4531 static char locbuf[32];
4532
4533 name = strerrno (errnum);
4534 if (name == NULL)
4535 {
4536 sprintf (locbuf, "Errno %d", errnum);
4537 }
4538 else
4539 {
4540 sprintf (locbuf, "%s (%d)", name, errnum);
4541 }
4542 return (locbuf);
4543 }
4544
4545 static void
4546 info_proc_signals (pip, summary)
4547 struct procinfo *pip;
4548 int summary;
4549 {
4550 int signo;
4551
4552 if (!summary)
4553 {
4554 #ifndef PROCFS_USE_READ_WRITE
4555 if (ioctl (pip -> ctl_fd, PIOCGTRACE, &pip -> trace) < 0)
4556 {
4557 print_sys_errmsg (pip -> pathname, errno);
4558 error ("PIOCGTRACE failed");
4559 }
4560 #endif
4561
4562 printf_filtered ("Disposition of signals:\n\n");
4563 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4564 "Signal", "Trace", "Hold", "Pending", "Description");
4565 for (signo = 0; signo < NSIG; signo++)
4566 {
4567 QUIT;
4568 printf_filtered ("\t%-15s ", signalname (signo));
4569 #ifdef UNIXWARE
4570 printf_filtered ("%-8s ",
4571 prismember (&pip -> prstatus.pr_sigtrace, signo)
4572 ? "on" : "off");
4573 printf_filtered ("%-8s ",
4574 prismember (&pip -> prstatus.pr_lwp.pr_context.uc_sigmask, signo)
4575 ? "on" : "off");
4576 #else
4577 printf_filtered ("%-8s ",
4578 prismember (&pip -> trace, signo)
4579 ? "on" : "off");
4580 printf_filtered ("%-8s ",
4581 prismember (&pip -> prstatus.pr_sighold, signo)
4582 ? "on" : "off");
4583 #endif
4584
4585 #ifdef UNIXWARE
4586 if (prismember (&pip->prstatus.pr_sigpend, signo) ||
4587 prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo))
4588 printf_filtered("%-8s ", "yes");
4589 else
4590 printf_filtered("%-8s ", "no");
4591 #else /* UNIXWARE */
4592 #ifdef PROCFS_SIGPEND_OFFSET
4593 /* Alpha OSF/1 numbers the pending signals from 1. */
4594 printf_filtered ("%-8s ",
4595 (signo ? prismember (&pip -> prstatus.pr_sigpend,
4596 signo - 1)
4597 : 0)
4598 ? "yes" : "no");
4599 #else
4600 printf_filtered ("%-8s ",
4601 prismember (&pip -> prstatus.pr_sigpend, signo)
4602 ? "yes" : "no");
4603 #endif
4604 #endif /* UNIXWARE */
4605 printf_filtered (" %s\n", safe_strsignal (signo));
4606 }
4607 printf_filtered ("\n");
4608 }
4609 }
4610
4611 static void
4612 info_proc_faults (pip, summary)
4613 struct procinfo *pip;
4614 int summary;
4615 {
4616 struct trans *transp;
4617
4618 if (!summary)
4619 {
4620 #ifndef UNIXWARE
4621 if (ioctl (pip -> ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0)
4622 {
4623 print_sys_errmsg (pip -> pathname, errno);
4624 error ("PIOCGFAULT failed");
4625 }
4626 #endif
4627
4628 printf_filtered ("Current traced hardware fault set:\n\n");
4629 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4630
4631 for (transp = faults_table; transp -> name != NULL; transp++)
4632 {
4633 QUIT;
4634 printf_filtered ("\t%-12s ", transp -> name);
4635 #ifdef UNIXWARE
4636 printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp -> value)
4637 ? "on" : "off");
4638 #else
4639 printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp -> value)
4640 ? "on" : "off");
4641 #endif
4642 printf_filtered ("\n");
4643 }
4644 printf_filtered ("\n");
4645 }
4646 }
4647
4648 static void
4649 info_proc_mappings (pip, summary)
4650 struct procinfo *pip;
4651 int summary;
4652 {
4653 int nmap;
4654 struct prmap *prmaps;
4655 struct prmap *prmap;
4656 struct stat sbuf;
4657
4658 if (!summary)
4659 {
4660 printf_filtered ("Mapped address spaces:\n\n");
4661 #ifdef BFD_HOST_64_BIT
4662 printf_filtered (" %18s %18s %10s %10s %7s\n",
4663 #else
4664 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4665 #endif
4666 "Start Addr",
4667 " End Addr",
4668 " Size",
4669 " Offset",
4670 "Flags");
4671 #ifdef PROCFS_USE_READ_WRITE
4672 if (fstat (pip->map_fd, &sbuf) == 0)
4673 {
4674 nmap = sbuf.st_size / sizeof (prmap_t);
4675 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4676 if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) &&
4677 (read (pip->map_fd, (char *) prmaps,
4678 nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps))))
4679 {
4680 int i = 0;
4681 for (prmap = prmaps; i < nmap; ++prmap, ++i)
4682 #else
4683 if (ioctl (pip -> ctl_fd, PIOCNMAP, &nmap) == 0)
4684 {
4685 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4686 if (ioctl (pip -> ctl_fd, PIOCMAP, prmaps) == 0)
4687 {
4688 for (prmap = prmaps; prmap -> pr_size; ++prmap)
4689 #endif /* PROCFS_USE_READ_WRITE */
4690 {
4691 #ifdef BFD_HOST_64_BIT
4692 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4693 #else
4694 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4695 #endif
4696 (unsigned long)prmap -> pr_vaddr,
4697 (unsigned long)prmap -> pr_vaddr
4698 + prmap -> pr_size - 1,
4699 prmap -> pr_size,
4700 prmap -> pr_off,
4701 mappingflags (prmap -> pr_mflags));
4702 }
4703 }
4704 }
4705 printf_filtered ("\n");
4706 }
4707 }
4708
4709 /*
4710
4711 LOCAL FUNCTION
4712
4713 info_proc -- implement the "info proc" command
4714
4715 SYNOPSIS
4716
4717 void info_proc (char *args, int from_tty)
4718
4719 DESCRIPTION
4720
4721 Implement gdb's "info proc" command by using the /proc interface
4722 to print status information about any currently running process.
4723
4724 Examples of the use of "info proc" are:
4725
4726 info proc (prints summary info for current inferior)
4727 info proc 123 (prints summary info for process with pid 123)
4728 info proc mappings (prints address mappings)
4729 info proc times (prints process/children times)
4730 info proc id (prints pid, ppid, gid, sid, etc)
4731 FIXME: i proc id not implemented.
4732 info proc status (prints general process state info)
4733 FIXME: i proc status not implemented.
4734 info proc signals (prints info about signal handling)
4735 info proc all (prints all info)
4736
4737 */
4738
4739 static void
4740 info_proc (args, from_tty)
4741 char *args;
4742 int from_tty;
4743 {
4744 int pid;
4745 struct procinfo *pip;
4746 struct cleanup *old_chain;
4747 char **argv;
4748 int argsize;
4749 int summary = 1;
4750 int flags = 0;
4751 int syscalls = 0;
4752 int signals = 0;
4753 int faults = 0;
4754 int mappings = 0;
4755 int times = 0;
4756 int id = 0;
4757 int status = 0;
4758 int all = 0;
4759 int nlwp;
4760 int *lwps;
4761
4762 old_chain = make_cleanup (null_cleanup, 0);
4763
4764 /* Default to using the current inferior if no pid specified. Note
4765 that inferior_pid may be 0, hence we set okerr. */
4766
4767 pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
4768 if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
4769 pip = procinfo_list; /* take first available */
4770 pid = pid & 0xffff; /* extract "real" pid */
4771
4772 if (args != NULL)
4773 {
4774 if ((argv = buildargv (args)) == NULL)
4775 {
4776 nomem (0);
4777 }
4778 make_cleanup (freeargv, (char *) argv);
4779
4780 while (*argv != NULL)
4781 {
4782 argsize = strlen (*argv);
4783 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
4784 {
4785 summary = 0;
4786 all = 1;
4787 }
4788 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
4789 {
4790 summary = 0;
4791 faults = 1;
4792 }
4793 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
4794 {
4795 summary = 0;
4796 flags = 1;
4797 }
4798 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
4799 {
4800 summary = 0;
4801 id = 1;
4802 }
4803 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
4804 {
4805 summary = 0;
4806 mappings = 1;
4807 }
4808 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
4809 {
4810 summary = 0;
4811 signals = 1;
4812 }
4813 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
4814 {
4815 summary = 0;
4816 status = 1;
4817 }
4818 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
4819 {
4820 summary = 0;
4821 syscalls = 1;
4822 }
4823 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
4824 {
4825 summary = 0;
4826 times = 1;
4827 }
4828 else if ((pid = atoi (*argv)) > 0)
4829 {
4830 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4831 memset (pip, 0, sizeof (*pip));
4832
4833 pip->pid = pid;
4834 if (!open_proc_file (pid, pip, O_RDONLY, 0))
4835 {
4836 perror_with_name (pip -> pathname);
4837 /* NOTREACHED */
4838 }
4839 pid = pip->pid;
4840 make_cleanup (close_proc_file, pip);
4841 }
4842 else if (**argv != '\000')
4843 {
4844 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
4845 }
4846 argv++;
4847 }
4848 }
4849
4850 /* If we don't have a valid open process at this point, then we have no
4851 inferior or didn't specify a specific pid. */
4852
4853 if (!pip)
4854 {
4855 error ("\
4856 No process. Start debugging a program or specify an explicit process ID.");
4857 }
4858
4859 if (!procfs_read_status (pip))
4860 {
4861 print_sys_errmsg (pip -> pathname, errno);
4862 error ("procfs_read_status failed");
4863 }
4864
4865 #ifndef PROCFS_USE_READ_WRITE
4866 #ifdef PIOCLWPIDS
4867 nlwp = pip->prstatus.pr_nlwp;
4868 lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
4869
4870 if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
4871 {
4872 print_sys_errmsg (pip -> pathname, errno);
4873 error ("PIOCLWPIDS failed");
4874 }
4875 #else /* PIOCLWPIDS */
4876 nlwp = 1;
4877 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
4878 lwps[0] = 0;
4879 #endif /* PIOCLWPIDS */
4880
4881 for (; nlwp > 0; nlwp--, lwps++)
4882 {
4883 pip = find_procinfo ((*lwps << 16) | pid, 1);
4884
4885 if (!pip)
4886 {
4887 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4888 memset (pip, 0, sizeof (*pip));
4889 if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0))
4890 continue;
4891
4892 make_cleanup (close_proc_file, pip);
4893
4894 if (!procfs_read_status (pip))
4895 {
4896 print_sys_errmsg (pip -> pathname, errno);
4897 error ("procfs_read_status failed");
4898 }
4899 }
4900
4901 #endif /* PROCFS_USE_READ_WRITE */
4902
4903 /* Print verbose information of the requested type(s), or just a summary
4904 of the information for all types. */
4905
4906 printf_filtered ("\nInformation for %s.%d:\n\n", pip -> pathname, *lwps);
4907 if (summary || all || flags)
4908 {
4909 info_proc_flags (pip, summary);
4910 }
4911 if (summary || all)
4912 {
4913 info_proc_stop (pip, summary);
4914 #ifdef UNIXWARE
4915 supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
4916 #else
4917 supply_gregset (&pip->prstatus.pr_reg);
4918 #endif
4919 printf_filtered ("PC: ");
4920 print_address (read_pc (), gdb_stdout);
4921 printf_filtered ("\n");
4922 }
4923 if (summary || all || signals || faults)
4924 {
4925 info_proc_siginfo (pip, summary);
4926 }
4927 if (summary || all || syscalls)
4928 {
4929 info_proc_syscalls (pip, summary);
4930 }
4931 if (summary || all || mappings)
4932 {
4933 info_proc_mappings (pip, summary);
4934 }
4935 if (summary || all || signals)
4936 {
4937 info_proc_signals (pip, summary);
4938 }
4939 if (summary || all || faults)
4940 {
4941 info_proc_faults (pip, summary);
4942 }
4943 printf_filtered ("\n");
4944
4945 /* All done, deal with closing any temporary process info structure,
4946 freeing temporary memory , etc. */
4947
4948 do_cleanups (old_chain);
4949 #ifndef PROCFS_USE_READ_WRITE
4950 }
4951 #endif
4952 }
4953
4954 /*
4955
4956 LOCAL FUNCTION
4957
4958 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
4959
4960 SYNOPSIS
4961
4962 void modify_inherit_on_fork_flag (fd, flag)
4963
4964 DESCRIPTION
4965
4966 Call this routine to modify the inherit-on-fork flag. This routine is
4967 just a nice wrapper to hide the #ifdefs needed by various systems to
4968 control this flag.
4969
4970 */
4971
4972 static void
4973 modify_inherit_on_fork_flag (fd, flag)
4974 int fd;
4975 int flag;
4976 {
4977 #if defined (PIOCSET) || defined (PCSET)
4978 long pr_flags;
4979 #endif
4980 int retval = 0;
4981 struct proc_ctl pctl;
4982
4983 #if defined (PIOCSET) || defined (PCSET) /* New method */
4984 pr_flags = PR_FORK;
4985 if (flag)
4986 {
4987 #ifdef PROCFS_USE_READ_WRITE
4988 pctl.cmd = PCSET;
4989 pctl.data = PR_FORK;
4990 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
4991 retval = -1;
4992 #else
4993 retval = ioctl (fd, PIOCSET, &pr_flags);
4994 #endif
4995 }
4996 else
4997 {
4998 #ifdef PROCFS_USE_READ_WRITE
4999 pctl.cmd = PCRESET;
5000 pctl.data = PR_FORK;
5001 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5002 retval = -1;
5003 #else
5004 retval = ioctl (fd, PIOCRESET, &pr_flags);
5005 #endif
5006 }
5007
5008 #else
5009 #ifdef PIOCSFORK /* Original method */
5010 if (flag)
5011 {
5012 retval = ioctl (fd, PIOCSFORK, NULL);
5013 }
5014 else
5015 {
5016 retval = ioctl (fd, PIOCRFORK, NULL);
5017 }
5018 #else
5019 Neither PR_FORK nor PIOCSFORK exist!!!
5020 #endif
5021 #endif
5022
5023 if (!retval)
5024 return;
5025
5026 print_sys_errmsg ("modify_inherit_on_fork_flag", errno);
5027 error ("PIOCSFORK or PR_FORK modification failed");
5028 }
5029
5030 /*
5031
5032 LOCAL FUNCTION
5033
5034 modify_run_on_last_close_flag - Change the run-on-last-close flag
5035
5036 SYNOPSIS
5037
5038 void modify_run_on_last_close_flag (fd, flag)
5039
5040 DESCRIPTION
5041
5042 Call this routine to modify the run-on-last-close flag. This routine
5043 is just a nice wrapper to hide the #ifdefs needed by various systems to
5044 control this flag.
5045
5046 */
5047
5048 static void
5049 modify_run_on_last_close_flag (fd, flag)
5050 int fd;
5051 int flag;
5052 {
5053 #if defined (PIOCSET) || defined (PCSET)
5054 long pr_flags;
5055 #endif
5056 int retval = 0;
5057 struct proc_ctl pctl;
5058
5059 #if defined (PIOCSET) || defined (PCSET) /* New method */
5060 pr_flags = PR_RLC;
5061 if (flag)
5062 {
5063 #ifdef PROCFS_USE_READ_WRITE
5064 pctl.cmd = PCSET;
5065 pctl.data = PR_RLC;
5066 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5067 retval = -1;
5068 #else
5069 retval = ioctl (fd, PIOCSET, &pr_flags);
5070 #endif
5071 }
5072 else
5073 {
5074 #ifdef PROCFS_USE_READ_WRITE
5075 pctl.cmd = PCRESET;
5076 pctl.data = PR_RLC;
5077 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5078 retval = -1;
5079 #else
5080 retval = ioctl (fd, PIOCRESET, &pr_flags);
5081 #endif
5082 }
5083
5084 #else
5085 #ifdef PIOCSRLC /* Original method */
5086 if (flag)
5087 retval = ioctl (fd, PIOCSRLC, NULL);
5088 else
5089 retval = ioctl (fd, PIOCRRLC, NULL);
5090 #else
5091 Neither PR_RLC nor PIOCSRLC exist!!!
5092 #endif
5093 #endif
5094
5095 if (!retval)
5096 return;
5097
5098 print_sys_errmsg ("modify_run_on_last_close_flag", errno);
5099 error ("PIOCSRLC or PR_RLC modification failed");
5100 }
5101
5102 /*
5103
5104 LOCAL FUNCTION
5105
5106 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5107
5108 SYNOPSIS
5109
5110 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5111
5112 DESCRIPTION
5113
5114 This function function disables traps for the specified system call.
5115 errok is non-zero if errors should be ignored.
5116 */
5117
5118 static void
5119 procfs_clear_syscall_trap (pi, syscall_num, errok)
5120 struct procinfo *pi;
5121 int syscall_num;
5122 int errok;
5123 {
5124 sysset_t sysset;
5125 int goterr, i;
5126
5127 #ifndef UNIXWARE
5128 goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
5129
5130 if (goterr && !errok)
5131 {
5132 print_sys_errmsg (pi->pathname, errno);
5133 error ("PIOCGENTRY failed");
5134 }
5135
5136 if (!goterr)
5137 {
5138 prdelset (&sysset, syscall_num);
5139
5140 if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok)
5141 {
5142 print_sys_errmsg (pi->pathname, errno);
5143 error ("PIOCSENTRY failed");
5144 }
5145 }
5146
5147 goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0;
5148
5149 if (goterr && !errok)
5150 {
5151 procfs_clear_syscall_trap (pi, syscall_num, 1);
5152 print_sys_errmsg (pi->pathname, errno);
5153 error ("PIOCGEXIT failed");
5154 }
5155
5156 if (!goterr)
5157 {
5158 praddset (&sysset, syscall_num);
5159
5160 if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok)
5161 {
5162 procfs_clear_syscall_trap (pi, syscall_num, 1);
5163 print_sys_errmsg (pi->pathname, errno);
5164 error ("PIOCSEXIT failed");
5165 }
5166 }
5167 #endif
5168
5169 if (!pi->syscall_handlers)
5170 {
5171 if (!errok)
5172 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5173 return;
5174 }
5175
5176 /* Remove handler func from the handler list */
5177
5178 for (i = 0; i < pi->num_syscall_handlers; i++)
5179 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5180 {
5181 if (i + 1 != pi->num_syscall_handlers)
5182 { /* Not the last entry.
5183 Move subsequent entries fwd. */
5184 memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1],
5185 (pi->num_syscall_handlers - i - 1)
5186 * sizeof (struct procfs_syscall_handler));
5187 }
5188
5189 pi->syscall_handlers = xrealloc (pi->syscall_handlers,
5190 (pi->num_syscall_handlers - 1)
5191 * sizeof (struct procfs_syscall_handler));
5192 pi->num_syscall_handlers--;
5193 return;
5194 }
5195
5196 if (!errok)
5197 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5198 syscall_num);
5199 }
5200
5201 /*
5202
5203 LOCAL FUNCTION
5204
5205 procfs_set_syscall_trap -- arrange for a function to be called when the
5206 child executes the specified system call.
5207
5208 SYNOPSIS
5209
5210 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5211 syscall_func_t *function)
5212
5213 DESCRIPTION
5214
5215 This function sets up an entry and/or exit trap for the specified system
5216 call. When the child executes the specified system call, your function
5217 will be called with the call #, a flag that indicates entry or exit, and
5218 pointers to rtnval and statval (which are used by procfs_wait). The
5219 function should return non-zero if something interesting happened, zero
5220 otherwise.
5221 */
5222
5223 static void
5224 procfs_set_syscall_trap (pi, syscall_num, flags, func)
5225 struct procinfo *pi;
5226 int syscall_num;
5227 int flags;
5228 syscall_func_t *func;
5229 {
5230 sysset_t sysset;
5231
5232 #ifndef UNIXWARE
5233 if (flags & PROCFS_SYSCALL_ENTRY)
5234 {
5235 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
5236 {
5237 print_sys_errmsg (pi->pathname, errno);
5238 error ("PIOCGENTRY failed");
5239 }
5240
5241 praddset (&sysset, syscall_num);
5242
5243 if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0)
5244 {
5245 print_sys_errmsg (pi->pathname, errno);
5246 error ("PIOCSENTRY failed");
5247 }
5248 }
5249
5250 if (flags & PROCFS_SYSCALL_EXIT)
5251 {
5252 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0)
5253 {
5254 procfs_clear_syscall_trap (pi, syscall_num, 1);
5255 print_sys_errmsg (pi->pathname, errno);
5256 error ("PIOCGEXIT failed");
5257 }
5258
5259 praddset (&sysset, syscall_num);
5260
5261 if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0)
5262 {
5263 procfs_clear_syscall_trap (pi, syscall_num, 1);
5264 print_sys_errmsg (pi->pathname, errno);
5265 error ("PIOCSEXIT failed");
5266 }
5267 }
5268 #endif
5269
5270 if (!pi->syscall_handlers)
5271 {
5272 pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler));
5273 pi->syscall_handlers[0].syscall_num = syscall_num;
5274 pi->syscall_handlers[0].func = func;
5275 pi->num_syscall_handlers = 1;
5276 }
5277 else
5278 {
5279 int i;
5280
5281 for (i = 0; i < pi->num_syscall_handlers; i++)
5282 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5283 {
5284 pi->syscall_handlers[i].func = func;
5285 return;
5286 }
5287
5288 pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1)
5289 * sizeof (struct procfs_syscall_handler));
5290 pi->syscall_handlers[i].syscall_num = syscall_num;
5291 pi->syscall_handlers[i].func = func;
5292 pi->num_syscall_handlers++;
5293 }
5294 }
5295
5296 #ifdef SYS_lwp_create
5297
5298 /*
5299
5300 LOCAL FUNCTION
5301
5302 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5303
5304 SYNOPSIS
5305
5306 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5307
5308 DESCRIPTION
5309
5310 This routine is called both when an inferior process and it's new lwp
5311 are about to finish a _lwp_create() system call. This is the system
5312 call that Solaris uses to create a lightweight process. When the
5313 target process gets this event, we can look at sysarg[2] to find the
5314 new childs lwp ID, and create a procinfo struct from that. After that,
5315 we pretend that we got a SIGTRAP, and return non-zero to tell
5316 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5317 sees the new process and continues it.
5318
5319 When we see the child exiting from lwp_create, we just contine it,
5320 since everything was handled when the parent trapped.
5321
5322 NOTES
5323 In effect, we are only paying attention to the parent's completion of
5324 the lwp_create syscall. If we only paid attention to the child
5325 instead, then we wouldn't detect the creation of a suspended thread.
5326 */
5327
5328 static int
5329 procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5330 struct procinfo *pi;
5331 int syscall_num;
5332 int why;
5333 int *rtnvalp;
5334 int *statvalp;
5335 {
5336 int lwp_id;
5337 struct procinfo *childpi;
5338 struct proc_ctl pctl;
5339
5340 /* We've just detected the completion of an lwp_create system call. Now we
5341 need to setup a procinfo struct for this thread, and notify the thread
5342 system of the new arrival. */
5343
5344 /* If lwp_create failed, then nothing interesting happened. Continue the
5345 process and go back to sleep. */
5346
5347 #ifdef UNIXWARE
5348 /* Joel ... can you check this logic out please? JKJ */
5349 if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1)
5350 { /* _lwp_create failed */
5351 pctl.cmd = PCRUN;
5352 pctl.data = PRCFAULT;
5353
5354 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5355 perror_with_name (pi->pathname);
5356
5357 return 0;
5358 }
5359 #else /* UNIXWARE */
5360 if (PROCFS_GET_CARRY (pi->prstatus.pr_reg))
5361 { /* _lwp_create failed */
5362 pi->prrun.pr_flags &= PRSTEP;
5363 pi->prrun.pr_flags |= PRCFAULT;
5364
5365 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5366 perror_with_name (pi->pathname);
5367
5368 return 0;
5369 }
5370 #endif
5371
5372 /* At this point, the new thread is stopped at it's first instruction, and
5373 the parent is stopped at the exit from lwp_create. */
5374
5375 if (pi->new_child) /* Child? */
5376 { /* Yes, just continue it */
5377 #ifdef UNIXWARE
5378 pctl.cmd = PCRUN;
5379 pctl.data = PRCFAULT;
5380
5381 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5382 #else /* !UNIXWARE */
5383 pi->prrun.pr_flags &= PRSTEP;
5384 pi->prrun.pr_flags |= PRCFAULT;
5385
5386 if ((pi->prstatus.pr_flags & PR_ISTOP)
5387 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5388 #endif /* !UNIXWARE */
5389 perror_with_name (pi->pathname);
5390
5391 pi->new_child = 0; /* No longer new */
5392
5393 return 0;
5394 }
5395
5396 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5397 in the child and continue the parent. */
5398
5399 /* Third arg is pointer to new thread id. */
5400 #ifdef UNIXWARE
5401 lwp_id = read_memory_integer (pi->prstatus.pr_lwp.pr_sysarg[2], sizeof (int));
5402 #else
5403 lwp_id = read_memory_integer (pi->prstatus.pr_sysarg[2], sizeof (int));
5404 #endif
5405
5406 lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
5407
5408 childpi = create_procinfo (lwp_id);
5409
5410 /* The new process has actually inherited the lwp_create syscall trap from
5411 it's parent, but we still have to call this to register handlers for
5412 that child. */
5413
5414 procfs_set_inferior_syscall_traps (childpi);
5415 add_thread (lwp_id);
5416 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
5417
5418 /* Continue the parent */
5419 #ifdef UNIXWARE
5420 pctl.cmd = PCRUN;
5421 pctl.data = PRCFAULT;
5422
5423 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5424 #else
5425 pi->prrun.pr_flags &= PRSTEP;
5426 pi->prrun.pr_flags |= PRCFAULT;
5427 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5428 #endif
5429 perror_with_name (pi->pathname);
5430
5431 /* The new child may have been created in one of two states:
5432 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5433 If suspended, we flag it to be continued later, when it has an event. */
5434
5435 #ifdef UNIXWARE
5436 if (childpi->prstatus.pr_lwp.pr_why == PR_SUSPENDED)
5437 #else
5438 if (childpi->prstatus.pr_why == PR_SUSPENDED)
5439 #endif
5440 childpi->new_child = 1; /* Flag this as an unseen child process */
5441 else
5442 {
5443 /* Continue the child */
5444 #ifdef UNIXWARE
5445 pctl.cmd = PCRUN;
5446 pctl.data = PRCFAULT;
5447
5448 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5449 #else
5450 childpi->prrun.pr_flags &= PRSTEP;
5451 childpi->prrun.pr_flags |= PRCFAULT;
5452
5453 if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
5454 #endif
5455 perror_with_name (childpi->pathname);
5456 }
5457 return 0;
5458 }
5459 #endif /* SYS_lwp_create */
5460
5461 /* Fork an inferior process, and start debugging it with /proc. */
5462
5463 static void
5464 procfs_create_inferior (exec_file, allargs, env)
5465 char *exec_file;
5466 char *allargs;
5467 char **env;
5468 {
5469 char *shell_file = getenv ("SHELL");
5470 char *tryname;
5471 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
5472 {
5473
5474 /* We will be looking down the PATH to find shell_file. If we
5475 just do this the normal way (via execlp, which operates by
5476 attempting an exec for each element of the PATH until it
5477 finds one which succeeds), then there will be an exec for
5478 each failed attempt, each of which will cause a PR_SYSEXIT
5479 stop, and we won't know how to distinguish the PR_SYSEXIT's
5480 for these failed execs with the ones for successful execs
5481 (whether the exec has succeeded is stored at that time in the
5482 carry bit or some such architecture-specific and
5483 non-ABI-specified place).
5484
5485 So I can't think of anything better than to search the PATH
5486 now. This has several disadvantages: (1) There is a race
5487 condition; if we find a file now and it is deleted before we
5488 exec it, we lose, even if the deletion leaves a valid file
5489 further down in the PATH, (2) there is no way to know exactly
5490 what an executable (in the sense of "capable of being
5491 exec'd") file is. Using access() loses because it may lose
5492 if the caller is the superuser; failing to use it loses if
5493 there are ACLs or some such. */
5494
5495 char *p;
5496 char *p1;
5497 /* FIXME-maybe: might want "set path" command so user can change what
5498 path is used from within GDB. */
5499 char *path = getenv ("PATH");
5500 int len;
5501 struct stat statbuf;
5502
5503 if (path == NULL)
5504 path = "/bin:/usr/bin";
5505
5506 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
5507 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
5508 {
5509 p1 = strchr (p, ':');
5510 if (p1 != NULL)
5511 len = p1 - p;
5512 else
5513 len = strlen (p);
5514 strncpy (tryname, p, len);
5515 tryname[len] = '\0';
5516 strcat (tryname, "/");
5517 strcat (tryname, shell_file);
5518 if (access (tryname, X_OK) < 0)
5519 continue;
5520 if (stat (tryname, &statbuf) < 0)
5521 continue;
5522 if (!S_ISREG (statbuf.st_mode))
5523 /* We certainly need to reject directories. I'm not quite
5524 as sure about FIFOs, sockets, etc., but I kind of doubt
5525 that people want to exec() these things. */
5526 continue;
5527 break;
5528 }
5529 if (p == NULL)
5530 /* Not found. This must be an error rather than merely passing
5531 the file to execlp(), because execlp() would try all the
5532 exec()s, causing GDB to get confused. */
5533 error ("Can't find shell %s in PATH", shell_file);
5534
5535 shell_file = tryname;
5536 }
5537
5538 fork_inferior (exec_file, allargs, env,
5539 proc_set_exec_trap, procfs_init_inferior, shell_file);
5540
5541 /* We are at the first instruction we care about. */
5542 /* Pedal to the metal... */
5543
5544 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
5545 }
5546
5547 /* Clean up after the inferior dies. */
5548
5549 static void
5550 procfs_mourn_inferior ()
5551 {
5552 struct procinfo *pi;
5553 struct procinfo *next_pi;
5554
5555 for (pi = procinfo_list; pi; pi = next_pi)
5556 {
5557 next_pi = pi->next;
5558 unconditionally_kill_inferior (pi);
5559 }
5560
5561 unpush_target (&procfs_ops);
5562 generic_mourn_inferior ();
5563 }
5564
5565
5566 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5567 static int
5568 procfs_can_run ()
5569 {
5570 /* This variable is controlled by modules that sit atop procfs that may layer
5571 their own process structure atop that provided here. sol-thread.c does
5572 this because of the Solaris two-level thread model. */
5573
5574 return !procfs_suppress_run;
5575 }
5576 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5577 #ifndef UNIXWARE
5578 \f
5579 /* Insert a watchpoint */
5580 int
5581 procfs_set_watchpoint(pid, addr, len, rw)
5582 int pid;
5583 CORE_ADDR addr;
5584 int len;
5585 int rw;
5586 {
5587 struct procinfo *pi;
5588 prwatch_t wpt;
5589
5590 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5591 wpt.pr_vaddr = (caddr_t)addr;
5592 wpt.pr_size = len;
5593 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
5594 if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0)
5595 {
5596 if (errno == E2BIG)
5597 return -1;
5598 /* Currently it sometimes happens that the same watchpoint gets
5599 deleted twice - don't die in this case (FIXME please) */
5600 if (errno == ESRCH && len == 0)
5601 return 0;
5602 print_sys_errmsg (pi->pathname, errno);
5603 error ("PIOCSWATCH failed");
5604 }
5605 return 0;
5606 }
5607
5608 int
5609 procfs_stopped_by_watchpoint(pid)
5610 int pid;
5611 {
5612 struct procinfo *pi;
5613 short what;
5614 short why;
5615
5616 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5617 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
5618 {
5619 why = pi->prstatus.pr_why;
5620 what = pi->prstatus.pr_what;
5621 if (why == PR_FAULTED
5622 #if defined (FLTWATCH) && defined (FLTKWATCH)
5623 && (what == FLTWATCH || what == FLTKWATCH)
5624 #else
5625 #ifdef FLTWATCH
5626 && (what == FLTWATCH)
5627 #endif
5628 #ifdef FLTKWATCH
5629 && (what == FLTKWATCH)
5630 #endif
5631 #endif
5632 )
5633 return what;
5634 }
5635 return 0;
5636 }
5637 #endif /* !UNIXWARE */
5638 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5639
5640 /* Why is this necessary? Shouldn't dead threads just be removed from the
5641 thread database? */
5642
5643 static int
5644 procfs_thread_alive (pid)
5645 int pid;
5646 {
5647 struct procinfo *pi, *next_pi;
5648
5649 for (pi = procinfo_list; pi; pi = next_pi)
5650 {
5651 next_pi = pi->next;
5652 if (pi -> pid == pid)
5653 if (procfs_read_status (pi)) /* alive */
5654 return 1;
5655 else /* defunct (exited) */
5656 {
5657 close_proc_file (pi);
5658 return 0;
5659 }
5660 }
5661 return 0;
5662 }
5663
5664 int
5665 procfs_first_available ()
5666 {
5667 struct procinfo *pi;
5668
5669 for (pi = procinfo_list; pi; pi = pi->next)
5670 {
5671 if (procfs_read_status (pi))
5672 return pi->pid;
5673 }
5674 return -1;
5675 }
5676
5677 int
5678 procfs_get_pid_fd (pid)
5679 int pid;
5680 {
5681 struct procinfo *pi = find_procinfo (pid, 1);
5682
5683 if (pi == NULL)
5684 return -1;
5685
5686 return pi->ctl_fd;
5687 }
5688
5689 /* Send a SIGINT to the process group. This acts just like the user typed a
5690 ^C on the controlling terminal.
5691
5692 XXX - This may not be correct for all systems. Some may want to use
5693 killpg() instead of kill (-pgrp). */
5694
5695 static void
5696 procfs_stop ()
5697 {
5698 extern pid_t inferior_process_group;
5699
5700 kill (-inferior_process_group, SIGINT);
5701 }
5702 \f
5703 /* Convert a pid to printable form. */
5704
5705 #ifdef TIDGET
5706 char *
5707 procfs_pid_to_str (pid)
5708 int pid;
5709 {
5710 static char buf[100];
5711
5712 sprintf (buf, "Kernel thread %d", TIDGET (pid));
5713
5714 return buf;
5715 }
5716 #endif /* TIDGET */
5717 \f
5718 struct target_ops procfs_ops = {
5719 "procfs", /* to_shortname */
5720 "Unix /proc child process", /* to_longname */
5721 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
5722 procfs_open, /* to_open */
5723 0, /* to_close */
5724 procfs_attach, /* to_attach */
5725 procfs_detach, /* to_detach */
5726 procfs_resume, /* to_resume */
5727 procfs_wait, /* to_wait */
5728 procfs_fetch_registers, /* to_fetch_registers */
5729 procfs_store_registers, /* to_store_registers */
5730 procfs_prepare_to_store, /* to_prepare_to_store */
5731 procfs_xfer_memory, /* to_xfer_memory */
5732 procfs_files_info, /* to_files_info */
5733 memory_insert_breakpoint, /* to_insert_breakpoint */
5734 memory_remove_breakpoint, /* to_remove_breakpoint */
5735 terminal_init_inferior, /* to_terminal_init */
5736 terminal_inferior, /* to_terminal_inferior */
5737 terminal_ours_for_output, /* to_terminal_ours_for_output */
5738 terminal_ours, /* to_terminal_ours */
5739 child_terminal_info, /* to_terminal_info */
5740 procfs_kill_inferior, /* to_kill */
5741 0, /* to_load */
5742 0, /* to_lookup_symbol */
5743 procfs_create_inferior, /* to_create_inferior */
5744 procfs_mourn_inferior, /* to_mourn_inferior */
5745 procfs_can_run, /* to_can_run */
5746 procfs_notice_signals, /* to_notice_signals */
5747 procfs_thread_alive, /* to_thread_alive */
5748 procfs_stop, /* to_stop */
5749 process_stratum, /* to_stratum */
5750 0, /* to_next */
5751 1, /* to_has_all_memory */
5752 1, /* to_has_memory */
5753 1, /* to_has_stack */
5754 1, /* to_has_registers */
5755 1, /* to_has_execution */
5756 0, /* sections */
5757 0, /* sections_end */
5758 OPS_MAGIC /* to_magic */
5759 };
5760
5761 void
5762 _initialize_procfs ()
5763 {
5764 #ifdef HAVE_OPTIONAL_PROC_FS
5765 char procname[MAX_PROC_NAME_SIZE];
5766 int fd;
5767
5768 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5769 don't add procfs support if we cannot access the running
5770 GDB via /proc. */
5771 sprintf (procname, STATUS_PROC_NAME_FMT, getpid ());
5772 if ((fd = open (procname, O_RDONLY)) < 0)
5773 return;
5774 close (fd);
5775 #endif
5776
5777 add_target (&procfs_ops);
5778
5779 add_info ("processes", info_proc,
5780 "Show process status information using /proc entry.\n\
5781 Specify process id or use current inferior by default.\n\
5782 Specify keywords for detailed information; default is summary.\n\
5783 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5784 `status', `syscalls', and `times'.\n\
5785 Unambiguous abbreviations may be used.");
5786
5787 init_syscall_table ();
5788 }