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