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change initialization of procfs_ops from compile time to run time.
[thirdparty/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 void 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 void 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 void
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 }
2567
2568 /*
2569
2570 GLOBAL FUNCTION
2571
2572 procfs_notice_signals
2573
2574 SYNOPSIS
2575
2576 static void procfs_notice_signals (int pid);
2577
2578 DESCRIPTION
2579
2580 When the user changes the state of gdb's signal handling via the
2581 "handle" command, this function gets called to see if any change
2582 in the /proc interface is required. It is also called internally
2583 by other /proc interface functions to initialize the state of
2584 the traced signal set.
2585
2586 One thing it does is that signals for which the state is "nostop",
2587 "noprint", and "pass", have their trace bits reset in the pr_trace
2588 field, so that they are no longer traced. This allows them to be
2589 delivered directly to the inferior without the debugger ever being
2590 involved.
2591 */
2592
2593 static void
2594 procfs_notice_signals (pid)
2595 int pid;
2596 {
2597 struct procinfo *pi;
2598 struct sig_ctl sctl;
2599
2600 pi = find_procinfo (pid, 0);
2601
2602 #ifdef UNIXWARE
2603 premptyset (&sctl.sigset);
2604 #else
2605 sctl.sigset = pi->prrun.pr_trace;
2606 #endif
2607
2608 notice_signals (pi, &sctl);
2609
2610 #ifndef UNIXWARE
2611 pi->prrun.pr_trace = sctl.sigset;
2612 #endif
2613 }
2614
2615 static void
2616 notice_signals (pi, sctl)
2617 struct procinfo *pi;
2618 struct sig_ctl *sctl;
2619 {
2620 int signo;
2621
2622 for (signo = 0; signo < NSIG; signo++)
2623 {
2624 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
2625 signal_print_state (target_signal_from_host (signo)) == 0 &&
2626 signal_pass_state (target_signal_from_host (signo)) == 1)
2627 {
2628 prdelset (&sctl->sigset, signo);
2629 }
2630 else
2631 {
2632 praddset (&sctl->sigset, signo);
2633 }
2634 }
2635 #ifdef PROCFS_USE_READ_WRITE
2636 sctl->cmd = PCSTRACE;
2637 if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0)
2638 #else
2639 if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset))
2640 #endif
2641 {
2642 print_sys_errmsg ("PIOCSTRACE failed", errno);
2643 }
2644 }
2645
2646 /*
2647
2648 LOCAL FUNCTION
2649
2650 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2651
2652 SYNOPSIS
2653
2654 void proc_set_exec_trap (void)
2655
2656 DESCRIPTION
2657
2658 This function is called in the child process when starting up
2659 an inferior, prior to doing the exec of the actual inferior.
2660 It sets the child process's exitset to make exit from the exec
2661 system call an event of interest to stop on, and then simply
2662 returns. The child does the exec, the system call returns, and
2663 the child stops at the first instruction, ready for the gdb
2664 parent process to take control of it.
2665
2666 NOTE
2667
2668 We need to use all local variables since the child may be sharing
2669 it's data space with the parent, if vfork was used rather than
2670 fork.
2671
2672 Also note that we want to turn off the inherit-on-fork flag in
2673 the child process so that any grand-children start with all
2674 tracing flags cleared.
2675 */
2676
2677 static void
2678 proc_set_exec_trap ()
2679 {
2680 struct sys_ctl exitset;
2681 struct sys_ctl entryset;
2682 char procname[MAX_PROC_NAME_SIZE];
2683 int fd;
2684
2685 sprintf (procname, CTL_PROC_NAME_FMT, getpid ());
2686 #ifdef UNIXWARE
2687 if ((fd = open (procname, O_WRONLY)) < 0)
2688 #else
2689 if ((fd = open (procname, O_RDWR)) < 0)
2690 #endif
2691 {
2692 perror (procname);
2693 gdb_flush (gdb_stderr);
2694 _exit (127);
2695 }
2696 premptyset (&exitset.sysset);
2697 premptyset (&entryset.sysset);
2698
2699 #ifdef PRFS_STOPEXEC
2700 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2701 exits from exec system calls because of the user level loader. */
2702 {
2703 int prfs_flags;
2704
2705 if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
2706 {
2707 perror (procname);
2708 gdb_flush (gdb_stderr);
2709 _exit (127);
2710 }
2711 prfs_flags |= PRFS_STOPEXEC;
2712 if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
2713 {
2714 perror (procname);
2715 gdb_flush (gdb_stderr);
2716 _exit (127);
2717 }
2718 }
2719 #else /* PRFS_STOPEXEC */
2720 /* GW: Rationale...
2721 Not all systems with /proc have all the exec* syscalls with the same
2722 names. On the SGI, for example, there is no SYS_exec, but there
2723 *is* a SYS_execv. So, we try to account for that. */
2724
2725 #ifdef SYS_exec
2726 praddset (&exitset.sysset, SYS_exec);
2727 #endif
2728 #ifdef SYS_execve
2729 praddset (&exitset.sysset, SYS_execve);
2730 #endif
2731 #ifdef SYS_execv
2732 praddset (&exitset.sysset, SYS_execv);
2733 #endif
2734
2735 #ifdef PROCFS_USE_READ_WRITE
2736 exitset.cmd = PCSEXIT;
2737 if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0)
2738 #else
2739 if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0)
2740 #endif
2741 {
2742 perror (procname);
2743 gdb_flush (gdb_stderr);
2744 _exit (127);
2745 }
2746 #endif /* PRFS_STOPEXEC */
2747
2748 praddset (&entryset.sysset, SYS_exit);
2749
2750 #ifdef PROCFS_USE_READ_WRITE
2751 entryset.cmd = PCSENTRY;
2752 if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0)
2753 #else
2754 if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0)
2755 #endif
2756 {
2757 perror (procname);
2758 gdb_flush (gdb_stderr);
2759 _exit (126);
2760 }
2761
2762 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2763 start with tracing flags cleared. */
2764
2765 modify_inherit_on_fork_flag (fd, 0);
2766
2767 /* Turn on run-on-last-close flag so that this process will not hang
2768 if GDB goes away for some reason. */
2769
2770 modify_run_on_last_close_flag (fd, 1);
2771
2772 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2773 /* NOTE: revisit when doing thread support for UW */
2774 #ifdef PR_ASYNC
2775 {
2776 long pr_flags;
2777 struct proc_ctl pctl;
2778
2779 /* Solaris needs this to make procfs treat all threads seperately. Without
2780 this, all threads halt whenever something happens to any thread. Since
2781 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2782
2783 pr_flags = PR_ASYNC;
2784 #ifdef PROCFS_USE_READ_WRITE
2785 pctl.cmd = PCSET;
2786 pctl.data = PR_FORK|PR_ASYNC;
2787 write (fd, (char *) &pctl, sizeof (struct proc_ctl));
2788 #else
2789 ioctl (fd, PIOCSET, &pr_flags);
2790 #endif
2791 }
2792 #endif /* PR_ASYNC */
2793 #endif /* !UNIXWARE */
2794 }
2795
2796 /*
2797
2798 GLOBAL FUNCTION
2799
2800 proc_iterate_over_mappings -- call function for every mapped space
2801
2802 SYNOPSIS
2803
2804 int proc_iterate_over_mappings (int (*func)())
2805
2806 DESCRIPTION
2807
2808 Given a pointer to a function, call that function for every
2809 mapped address space, passing it an open file descriptor for
2810 the file corresponding to that mapped address space (if any)
2811 and the base address of the mapped space. Quit when we hit
2812 the end of the mappings or the function returns nonzero.
2813 */
2814
2815 #ifdef UNIXWARE
2816 int
2817 proc_iterate_over_mappings (func)
2818 int (*func) PARAMS ((int, CORE_ADDR));
2819 {
2820 int nmap;
2821 int fd;
2822 int funcstat = 0;
2823 prmap_t *prmaps;
2824 prmap_t *prmap;
2825 struct procinfo *pi;
2826 struct stat sbuf;
2827
2828 pi = current_procinfo;
2829
2830 if (fstat (pi->map_fd, &sbuf) < 0)
2831 return 0;
2832
2833 nmap = sbuf.st_size / sizeof (prmap_t);
2834 prmaps = (prmap_t *) alloca (nmap * sizeof(prmap_t));
2835 if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) &&
2836 (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) ==
2837 (nmap * sizeof (prmap_t))))
2838 {
2839 int i = 0;
2840 for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i)
2841 {
2842 char name[sizeof ("/proc/1234567890/object") +
2843 sizeof (prmap->pr_mapname)];
2844 sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname);
2845 if ((fd = open (name, O_RDONLY)) == -1)
2846 {
2847 funcstat = 1;
2848 break;
2849 }
2850 funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
2851 close (fd);
2852 }
2853 }
2854 return (funcstat);
2855 }
2856 #else /* UNIXWARE */
2857 int
2858 proc_iterate_over_mappings (func)
2859 int (*func) PARAMS ((int, CORE_ADDR));
2860 {
2861 int nmap;
2862 int fd;
2863 int funcstat = 0;
2864 struct prmap *prmaps;
2865 struct prmap *prmap;
2866 struct procinfo *pi;
2867
2868 pi = current_procinfo;
2869
2870 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
2871 {
2872 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2873 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
2874 {
2875 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
2876 {
2877 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
2878 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
2879 close (fd);
2880 }
2881 }
2882 }
2883 return (funcstat);
2884 }
2885 #endif /* UNIXWARE */
2886
2887 #if 0 /* Currently unused */
2888 /*
2889
2890 GLOBAL FUNCTION
2891
2892 proc_base_address -- find base address for segment containing address
2893
2894 SYNOPSIS
2895
2896 CORE_ADDR proc_base_address (CORE_ADDR addr)
2897
2898 DESCRIPTION
2899
2900 Given an address of a location in the inferior, find and return
2901 the base address of the mapped segment containing that address.
2902
2903 This is used for example, by the shared library support code,
2904 where we have the pc value for some location in the shared library
2905 where we are stopped, and need to know the base address of the
2906 segment containing that address.
2907 */
2908
2909 CORE_ADDR
2910 proc_base_address (addr)
2911 CORE_ADDR addr;
2912 {
2913 int nmap;
2914 struct prmap *prmaps;
2915 struct prmap *prmap;
2916 CORE_ADDR baseaddr = 0;
2917 struct procinfo *pi;
2918
2919 pi = current_procinfo;
2920
2921 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
2922 {
2923 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2924 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
2925 {
2926 for (prmap = prmaps; prmap -> pr_size; ++prmap)
2927 {
2928 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
2929 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
2930 {
2931 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
2932 break;
2933 }
2934 }
2935 }
2936 }
2937 return (baseaddr);
2938 }
2939
2940 #endif /* 0 */
2941
2942 #ifndef UNIXWARE
2943 /*
2944
2945 LOCAL FUNCTION
2946
2947 proc_address_to_fd -- return open fd for file mapped to address
2948
2949 SYNOPSIS
2950
2951 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2952
2953 DESCRIPTION
2954
2955 Given an address in the current inferior's address space, use the
2956 /proc interface to find an open file descriptor for the file that
2957 this address was mapped in from. Return -1 if there is no current
2958 inferior. Print a warning message if there is an inferior but
2959 the address corresponds to no file (IE a bogus address).
2960
2961 */
2962
2963 static int
2964 proc_address_to_fd (pi, addr, complain)
2965 struct procinfo *pi;
2966 CORE_ADDR addr;
2967 int complain;
2968 {
2969 int fd = -1;
2970
2971 if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
2972 {
2973 if (complain)
2974 {
2975 print_sys_errmsg (pi->pathname, errno);
2976 warning ("can't find mapped file for address 0x%x", addr);
2977 }
2978 }
2979 return (fd);
2980 }
2981 #endif /* !UNIXWARE */
2982
2983 /* Attach to process PID, then initialize for debugging it
2984 and wait for the trace-trap that results from attaching. */
2985
2986 static void
2987 procfs_attach (args, from_tty)
2988 char *args;
2989 int from_tty;
2990 {
2991 char *exec_file;
2992 int pid;
2993
2994 if (!args)
2995 error_no_arg ("process-id to attach");
2996
2997 pid = atoi (args);
2998
2999 if (pid == getpid()) /* Trying to masturbate? */
3000 error ("I refuse to debug myself!");
3001
3002 if (from_tty)
3003 {
3004 exec_file = (char *) get_exec_file (0);
3005
3006 if (exec_file)
3007 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
3008 else
3009 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
3010
3011 gdb_flush (gdb_stdout);
3012 }
3013
3014 inferior_pid = pid = do_attach (pid);
3015 push_target (&procfs_ops);
3016 }
3017
3018
3019 /* Take a program previously attached to and detaches it.
3020 The program resumes execution and will no longer stop
3021 on signals, etc. We'd better not have left any breakpoints
3022 in the program or it'll die when it hits one. For this
3023 to work, it may be necessary for the process to have been
3024 previously attached. It *might* work if the program was
3025 started via the normal ptrace (PTRACE_TRACEME). */
3026
3027 static void
3028 procfs_detach (args, from_tty)
3029 char *args;
3030 int from_tty;
3031 {
3032 int siggnal = 0;
3033
3034 if (from_tty)
3035 {
3036 char *exec_file = get_exec_file (0);
3037 if (exec_file == 0)
3038 exec_file = "";
3039 printf_unfiltered ("Detaching from program: %s %s\n",
3040 exec_file, target_pid_to_str (inferior_pid));
3041 gdb_flush (gdb_stdout);
3042 }
3043 if (args)
3044 siggnal = atoi (args);
3045
3046 do_detach (siggnal);
3047 inferior_pid = 0;
3048 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
3049 }
3050
3051 /* Get ready to modify the registers array. On machines which store
3052 individual registers, this doesn't need to do anything. On machines
3053 which store all the registers in one fell swoop, this makes sure
3054 that registers contains all the registers from the program being
3055 debugged. */
3056
3057 static void
3058 procfs_prepare_to_store ()
3059 {
3060 #ifdef CHILD_PREPARE_TO_STORE
3061 CHILD_PREPARE_TO_STORE ();
3062 #endif
3063 }
3064
3065 /* Print status information about what we're accessing. */
3066
3067 static void
3068 procfs_files_info (ignore)
3069 struct target_ops *ignore;
3070 {
3071 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3072 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
3073 }
3074
3075 /* ARGSUSED */
3076 static void
3077 procfs_open (arg, from_tty)
3078 char *arg;
3079 int from_tty;
3080 {
3081 error ("Use the \"run\" command to start a Unix child process.");
3082 }
3083
3084 /*
3085
3086 LOCAL FUNCTION
3087
3088 do_attach -- attach to an already existing process
3089
3090 SYNOPSIS
3091
3092 int do_attach (int pid)
3093
3094 DESCRIPTION
3095
3096 Attach to an already existing process with the specified process
3097 id. If the process is not already stopped, query whether to
3098 stop it or not.
3099
3100 NOTES
3101
3102 The option of stopping at attach time is specific to the /proc
3103 versions of gdb. Versions using ptrace force the attachee
3104 to stop. (I have changed this version to do so, too. All you
3105 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3106
3107 */
3108
3109 static int
3110 do_attach (pid)
3111 int pid;
3112 {
3113 struct procinfo *pi;
3114 struct sig_ctl sctl;
3115 struct flt_ctl fctl;
3116 int nlwp, *lwps;
3117
3118 pi = init_procinfo (pid, 0);
3119
3120 #ifdef PIOCLWPIDS
3121 nlwp = pi->prstatus.pr_nlwp;
3122 lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
3123
3124 if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
3125 {
3126 print_sys_errmsg (pi -> pathname, errno);
3127 error ("PIOCLWPIDS failed");
3128 }
3129 #else /* PIOCLWPIDS */
3130 nlwp = 1;
3131 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
3132 lwps[0] = 0;
3133 #endif
3134 for (; nlwp > 0; nlwp--, lwps++)
3135 {
3136 /* First one has already been created above. */
3137 if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
3138 pi = init_procinfo ((*lwps << 16) | pid, 0);
3139
3140 #ifdef UNIXWARE
3141 if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
3142 #else
3143 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3144 #endif
3145 {
3146 pi->was_stopped = 1;
3147 }
3148 else
3149 {
3150 pi->was_stopped = 0;
3151 if (1 || query ("Process is currently running, stop it? "))
3152 {
3153 long cmd;
3154 /* Make it run again when we close it. */
3155 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3156 #ifdef PROCFS_USE_READ_WRITE
3157 cmd = PCSTOP;
3158 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3159 #else
3160 if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
3161 #endif
3162 {
3163 print_sys_errmsg (pi->pathname, errno);
3164 close_proc_file (pi);
3165 error ("PIOCSTOP failed");
3166 }
3167 #ifdef UNIXWARE
3168 if (!procfs_read_status (pi))
3169 {
3170 print_sys_errmsg (pi->pathname, errno);
3171 close_proc_file (pi);
3172 error ("procfs_read_status failed");
3173 }
3174 #endif
3175 pi->nopass_next_sigstop = 1;
3176 }
3177 else
3178 {
3179 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3180 target_pid_to_str (pi->pid));
3181 }
3182 }
3183
3184 #ifdef PROCFS_USE_READ_WRITE
3185 fctl.cmd = PCSFAULT;
3186 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
3187 print_sys_errmsg ("PCSFAULT failed", errno);
3188 #else /* PROCFS_USE_READ_WRITE */
3189 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
3190 {
3191 print_sys_errmsg ("PIOCSFAULT failed", errno);
3192 }
3193 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
3194 {
3195 print_sys_errmsg ("PIOCSTRACE failed", errno);
3196 }
3197 add_thread (pi->pid);
3198 procfs_set_inferior_syscall_traps (pi);
3199 #endif /* PROCFS_USE_READ_WRITE */
3200 }
3201 attach_flag = 1;
3202 return (pi->pid);
3203 }
3204
3205 /*
3206
3207 LOCAL FUNCTION
3208
3209 do_detach -- detach from an attached-to process
3210
3211 SYNOPSIS
3212
3213 void do_detach (int signal)
3214
3215 DESCRIPTION
3216
3217 Detach from the current attachee.
3218
3219 If signal is non-zero, the attachee is started running again and sent
3220 the specified signal.
3221
3222 If signal is zero and the attachee was not already stopped when we
3223 attached to it, then we make it runnable again when we detach.
3224
3225 Otherwise, we query whether or not to make the attachee runnable
3226 again, since we may simply want to leave it in the state it was in
3227 when we attached.
3228
3229 We report any problems, but do not consider them errors, since we
3230 MUST detach even if some things don't seem to go right. This may not
3231 be the ideal situation. (FIXME).
3232 */
3233
3234 static void
3235 do_detach (signal)
3236 int signal;
3237 {
3238 struct procinfo *pi;
3239
3240 for (pi = procinfo_list; pi; pi = pi->next)
3241 {
3242 if (signal)
3243 {
3244 set_proc_siginfo (pi, signal);
3245 }
3246 #ifdef PROCFS_USE_READ_WRITE
3247 pi->saved_exitset.cmd = PCSEXIT;
3248 if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
3249 sizeof (struct sys_ctl)) < 0)
3250 #else
3251 if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
3252 #endif
3253 {
3254 print_sys_errmsg (pi->pathname, errno);
3255 printf_unfiltered ("PIOCSEXIT failed.\n");
3256 }
3257 #ifdef PROCFS_USE_READ_WRITE
3258 pi->saved_entryset.cmd = PCSENTRY;
3259 if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
3260 sizeof (struct sys_ctl)) < 0)
3261 #else
3262 if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
3263 #endif
3264 {
3265 print_sys_errmsg (pi->pathname, errno);
3266 printf_unfiltered ("PIOCSENTRY failed.\n");
3267 }
3268 #ifdef PROCFS_USE_READ_WRITE
3269 pi->saved_trace.cmd = PCSTRACE;
3270 if (write (pi->ctl_fd, (char *) &pi->saved_trace,
3271 sizeof (struct sig_ctl)) < 0)
3272 #else
3273 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
3274 #endif
3275 {
3276 print_sys_errmsg (pi->pathname, errno);
3277 printf_unfiltered ("PIOCSTRACE failed.\n");
3278 }
3279 #ifndef UNIXWARE
3280 if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
3281 {
3282 print_sys_errmsg (pi->pathname, errno);
3283 printf_unfiltered ("PIOSCHOLD failed.\n");
3284 }
3285 #endif
3286 #ifdef PROCFS_USE_READ_WRITE
3287 pi->saved_fltset.cmd = PCSFAULT;
3288 if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
3289 sizeof (struct flt_ctl)) < 0)
3290 #else
3291 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
3292 #endif
3293 {
3294 print_sys_errmsg (pi->pathname, errno);
3295 printf_unfiltered ("PIOCSFAULT failed.\n");
3296 }
3297 if (!procfs_read_status (pi))
3298 {
3299 print_sys_errmsg (pi->pathname, errno);
3300 printf_unfiltered ("procfs_read_status failed.\n");
3301 }
3302 else
3303 {
3304 #ifdef UNIXWARE
3305 if (signal || (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
3306 #else
3307 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
3308 #endif
3309 {
3310 long cmd;
3311 struct proc_ctl pctl;
3312
3313 if (signal || !pi->was_stopped ||
3314 query ("Was stopped when attached, make it runnable again? "))
3315 {
3316 /* Clear any pending signal if we want to detach without
3317 a signal. */
3318 if (signal == 0)
3319 set_proc_siginfo (pi, signal);
3320
3321 /* Clear any fault that might have stopped it. */
3322 #ifdef PROCFS_USE_READ_WRITE
3323 cmd = PCCFAULT;
3324 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3325 #else
3326 if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
3327 #endif
3328 {
3329 print_sys_errmsg (pi->pathname, errno);
3330 printf_unfiltered ("PIOCCFAULT failed.\n");
3331 }
3332
3333 /* Make it run again when we close it. */
3334
3335 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3336 }
3337 }
3338 }
3339 close_proc_file (pi);
3340 }
3341 attach_flag = 0;
3342 }
3343
3344 /* emulate wait() as much as possible.
3345 Wait for child to do something. Return pid of child, or -1 in case
3346 of error; store status in *OURSTATUS.
3347
3348 Not sure why we can't
3349 just use wait(), but it seems to have problems when applied to a
3350 process being controlled with the /proc interface.
3351
3352 We have a race problem here with no obvious solution. We need to let
3353 the inferior run until it stops on an event of interest, which means
3354 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3355 ioctl if the process is already stopped on something that is not an
3356 event of interest, or the call will hang indefinitely. Thus we first
3357 use PIOCSTATUS to see if the process is not stopped. If not, then we
3358 use PIOCWSTOP. But during the window between the two, if the process
3359 stops for any reason that is not an event of interest (such as a job
3360 control signal) then gdb will hang. One possible workaround is to set
3361 an alarm to wake up every minute of so and check to see if the process
3362 is still running, and if so, then reissue the PIOCWSTOP. But this is
3363 a real kludge, so has not been implemented. FIXME: investigate
3364 alternatives.
3365
3366 FIXME: Investigate why wait() seems to have problems with programs
3367 being control by /proc routines. */
3368 static int
3369 procfs_wait (pid, ourstatus)
3370 int pid;
3371 struct target_waitstatus *ourstatus;
3372 {
3373 short what;
3374 short why;
3375 int statval = 0;
3376 int checkerr = 0;
3377 int rtnval = -1;
3378 struct procinfo *pi;
3379 struct proc_ctl pctl;
3380
3381 scan_again:
3382
3383 /* handle all syscall events first, otherwise we might not
3384 notice a thread was created until too late. */
3385
3386 for (pi = procinfo_list; pi; pi = pi->next)
3387 {
3388 if (!pi->had_event)
3389 continue;
3390
3391 #ifdef UNIXWARE
3392 if (! (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)) )
3393 continue;
3394
3395 why = pi->prstatus.pr_lwp.pr_why;
3396 what = pi->prstatus.pr_lwp.pr_what;
3397 #else
3398 if (! (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) )
3399 continue;
3400
3401 why = pi->prstatus.pr_why;
3402 what = pi->prstatus.pr_what;
3403 #endif
3404 if (why == PR_SYSENTRY || why == PR_SYSEXIT)
3405 {
3406 int i;
3407 int found_handler = 0;
3408
3409 for (i = 0; i < pi->num_syscall_handlers; i++)
3410 if (pi->syscall_handlers[i].syscall_num == what)
3411 {
3412 found_handler = 1;
3413 pi->saved_rtnval = pi->pid;
3414 pi->saved_statval = 0;
3415 if (!pi->syscall_handlers[i].func
3416 (pi, what, why, &pi->saved_rtnval, &pi->saved_statval))
3417 pi->had_event = 0;
3418 break;
3419 }
3420
3421 if (!found_handler)
3422 {
3423 if (why == PR_SYSENTRY)
3424 error ("PR_SYSENTRY, unhandled system call %d", what);
3425 else
3426 error ("PR_SYSEXIT, unhandled system call %d", what);
3427 }
3428 }
3429 }
3430
3431 /* find a relevant process with an event */
3432
3433 for (pi = procinfo_list; pi; pi = pi->next)
3434 if (pi->had_event && (pid == -1 || pi->pid == pid))
3435 break;
3436
3437 if (!pi)
3438 {
3439 wait_fd ();
3440 goto scan_again;
3441 }
3442
3443 #ifdef UNIXWARE
3444 if (!checkerr && !(pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
3445 #else
3446 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
3447 #endif
3448 {
3449 if (!procfs_write_pcwstop (pi))
3450 {
3451 checkerr++;
3452 }
3453 }
3454 if (checkerr)
3455 {
3456 if (errno == ENOENT)
3457 {
3458 /* XXX Fixme -- what to do if attached? Can't call wait... */
3459 rtnval = wait (&statval);
3460 if ((rtnval) != (PIDGET (inferior_pid)))
3461 {
3462 print_sys_errmsg (pi->pathname, errno);
3463 error ("procfs_wait: wait failed, returned %d", rtnval);
3464 /* NOTREACHED */
3465 }
3466 }
3467 else
3468 {
3469 print_sys_errmsg (pi->pathname, errno);
3470 error ("PIOCSTATUS or PIOCWSTOP failed.");
3471 /* NOTREACHED */
3472 }
3473 }
3474 #ifdef UNIXWARE
3475 else if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
3476 #else
3477 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3478 #endif
3479 {
3480 #ifdef UNIXWARE
3481 rtnval = pi->prstatus.pr_pid;
3482 why = pi->prstatus.pr_lwp.pr_why;
3483 what = pi->prstatus.pr_lwp.pr_what;
3484 #else
3485 rtnval = pi->pid;
3486 why = pi->prstatus.pr_why;
3487 what = pi->prstatus.pr_what;
3488 #endif
3489
3490 switch (why)
3491 {
3492 case PR_SIGNALLED:
3493 statval = (what << 8) | 0177;
3494 break;
3495 case PR_SYSENTRY:
3496 case PR_SYSEXIT:
3497 rtnval = pi->saved_rtnval;
3498 statval = pi->saved_statval;
3499 break;
3500 case PR_REQUESTED:
3501 statval = (SIGSTOP << 8) | 0177;
3502 break;
3503 case PR_JOBCONTROL:
3504 statval = (what << 8) | 0177;
3505 break;
3506 case PR_FAULTED:
3507 switch (what)
3508 {
3509 #ifdef FLTWATCH
3510 case FLTWATCH:
3511 statval = (SIGTRAP << 8) | 0177;
3512 break;
3513 #endif
3514 #ifdef FLTKWATCH
3515 case FLTKWATCH:
3516 statval = (SIGTRAP << 8) | 0177;
3517 break;
3518 #endif
3519 #ifndef FAULTED_USE_SIGINFO
3520 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3521 Solaris fills in si_signo. I'm not sure about others. */
3522 case FLTPRIV:
3523 case FLTILL:
3524 statval = (SIGILL << 8) | 0177;
3525 break;
3526 case FLTBPT:
3527 case FLTTRACE:
3528 statval = (SIGTRAP << 8) | 0177;
3529 break;
3530 case FLTSTACK:
3531 case FLTACCESS:
3532 case FLTBOUNDS:
3533 statval = (SIGSEGV << 8) | 0177;
3534 break;
3535 case FLTIOVF:
3536 case FLTIZDIV:
3537 case FLTFPE:
3538 statval = (SIGFPE << 8) | 0177;
3539 break;
3540 case FLTPAGE: /* Recoverable page fault */
3541 #endif /* not FAULTED_USE_SIGINFO */
3542 default:
3543 /* Use the signal which the kernel assigns. This is better than
3544 trying to second-guess it from the fault. In fact, I suspect
3545 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3546 #ifdef UNIXWARE
3547 statval = ((pi->prstatus.pr_lwp.pr_info.si_signo) << 8) | 0177;
3548 #else
3549 statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
3550 #endif
3551 break;
3552 }
3553 break;
3554 default:
3555 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
3556 }
3557 /* Stop all the other threads when any of them stops. */
3558
3559 {
3560 struct procinfo *procinfo, *next_pi;
3561
3562 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3563 {
3564 next_pi = procinfo->next;
3565 if (!procinfo->had_event)
3566 {
3567 #ifdef PROCFS_USE_READ_WRITE
3568 long cmd = PCSTOP;
3569 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3570 {
3571 print_sys_errmsg (procinfo->pathname, errno);
3572 error ("PCSTOP failed");
3573 }
3574 #else
3575 /* A bug in Solaris (2.5) causes us to hang when trying to
3576 stop a stopped process. So, we have to check first in
3577 order to avoid the hang. */
3578 if (!procfs_read_status (procinfo))
3579 {
3580 /* The LWP has apparently terminated. */
3581 if (info_verbose)
3582 printf_filtered ("LWP %d doesn't respond.\n",
3583 (procinfo->pid >> 16) & 0xffff);
3584 close_proc_file (procinfo);
3585 continue;
3586 }
3587
3588 if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
3589 if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
3590 < 0)
3591 {
3592 print_sys_errmsg (procinfo->pathname, errno);
3593 warning ("PIOCSTOP failed");
3594 }
3595 #endif
3596 }
3597 }
3598 }
3599 }
3600 else
3601 {
3602 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3603 #ifdef UNIXWARE
3604 pi->prstatus.pr_lwp.pr_flags);
3605 #else
3606 pi->prstatus.pr_flags);
3607 #endif
3608 }
3609
3610 store_waitstatus (ourstatus, statval);
3611
3612 if (rtnval == -1) /* No more children to wait for */
3613 {
3614 warning ("Child process unexpectedly missing");
3615 /* Claim it exited with unknown signal. */
3616 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3617 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
3618 return rtnval;
3619 }
3620
3621 pi->had_event = 0; /* Indicate that we've seen this one */
3622 return (rtnval);
3623 }
3624
3625 /*
3626
3627 LOCAL FUNCTION
3628
3629 set_proc_siginfo - set a process's current signal info
3630
3631 SYNOPSIS
3632
3633 void set_proc_siginfo (struct procinfo *pip, int signo);
3634
3635 DESCRIPTION
3636
3637 Given a pointer to a process info struct in PIP and a signal number
3638 in SIGNO, set the process's current signal and its associated signal
3639 information. The signal will be delivered to the process immediately
3640 after execution is resumed, even if it is being held. In addition,
3641 this particular delivery will not cause another PR_SIGNALLED stop
3642 even if the signal is being traced.
3643
3644 If we are not delivering the same signal that the prstatus siginfo
3645 struct contains information about, then synthesize a siginfo struct
3646 to match the signal we are doing to deliver, make it of the type
3647 "generated by a user process", and send this synthesized copy. When
3648 used to set the inferior's signal state, this will be required if we
3649 are not currently stopped because of a traced signal, or if we decide
3650 to continue with a different signal.
3651
3652 Note that when continuing the inferior from a stop due to receipt
3653 of a traced signal, we either have set PRCSIG to clear the existing
3654 signal, or we have to call this function to do a PIOCSSIG with either
3655 the existing siginfo struct from pr_info, or one we have synthesized
3656 appropriately for the signal we want to deliver. Otherwise if the
3657 signal is still being traced, the inferior will immediately stop
3658 again.
3659
3660 See siginfo(5) for more details.
3661 */
3662
3663 static void
3664 set_proc_siginfo (pip, signo)
3665 struct procinfo *pip;
3666 int signo;
3667 {
3668 struct siginfo newsiginfo;
3669 struct siginfo *sip;
3670 struct sigi_ctl sictl;
3671
3672 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3673 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3674 receives a PIOCSSIG with a signal identical to the current signal,
3675 it messes up the current signal. Work around the kernel bug. */
3676 #ifdef UNIXWARE
3677 if (signo == pip -> prstatus.pr_lwp.pr_cursig)
3678 #else
3679 if (signo == pip -> prstatus.pr_cursig)
3680 #endif
3681 return;
3682 #endif
3683
3684 #ifdef UNIXWARE
3685 if (signo == pip->prstatus.pr_lwp.pr_info.si_signo)
3686 {
3687 memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info,
3688 sizeof (siginfo_t));
3689 }
3690 #else
3691 if (signo == pip -> prstatus.pr_info.si_signo)
3692 {
3693 sip = &pip -> prstatus.pr_info;
3694 }
3695 #endif
3696 else
3697 {
3698 #ifdef UNIXWARE
3699 siginfo_t *sip = &sictl.siginfo;
3700 memset ((char *) sip, 0, sizeof (siginfo_t));
3701 #else
3702 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
3703 sip = &newsiginfo;
3704 #endif
3705 sip -> si_signo = signo;
3706 sip -> si_code = 0;
3707 sip -> si_errno = 0;
3708 sip -> si_pid = getpid ();
3709 sip -> si_uid = getuid ();
3710 }
3711 #ifdef PROCFS_USE_READ_WRITE
3712 sictl.cmd = PCSSIG;
3713 if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0)
3714 #else
3715 if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0)
3716 #endif
3717 {
3718 print_sys_errmsg (pip -> pathname, errno);
3719 warning ("PIOCSSIG failed");
3720 }
3721 }
3722
3723 /* Resume execution of process PID. If STEP is nozero, then
3724 just single step it. If SIGNAL is nonzero, restart it with that
3725 signal activated. */
3726
3727 static void
3728 procfs_resume (pid, step, signo)
3729 int pid;
3730 int step;
3731 enum target_signal signo;
3732 {
3733 int signal_to_pass;
3734 struct procinfo *pi, *procinfo, *next_pi;
3735 struct proc_ctl pctl;
3736
3737 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3738
3739 errno = 0;
3740 #ifdef UNIXWARE
3741 pctl.cmd = PCRUN;
3742 pctl.data = PRCFAULT;
3743 #else
3744 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
3745 #endif
3746
3747 #if 0
3748 /* It should not be necessary. If the user explicitly changes the value,
3749 value_assign calls write_register_bytes, which writes it. */
3750 /* It may not be absolutely necessary to specify the PC value for
3751 restarting, but to be safe we use the value that gdb considers
3752 to be current. One case where this might be necessary is if the
3753 user explicitly changes the PC value that gdb considers to be
3754 current. FIXME: Investigate if this is necessary or not. */
3755
3756 #ifdef PRSVADDR_BROKEN
3757 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3758 place to put nPC. In fact, if you use this, nPC seems to be set to some
3759 random garbage. We have to rely on the fact that PC and nPC have been
3760 written previously via PIOCSREG during a register flush. */
3761
3762 pi->prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
3763 pi->prrun.pr_flags != PRSVADDR;
3764 #endif
3765 #endif
3766
3767 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
3768 /* When attaching to a child process, if we forced it to stop with
3769 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3770 Upon resuming the first time after such a stop, we explicitly
3771 inhibit sending it another SIGSTOP, which would be the normal
3772 result of default signal handling. One potential drawback to
3773 this is that we will also ignore any attempt to by the user
3774 to explicitly continue after the attach with a SIGSTOP. Ultimately
3775 this problem should be dealt with by making the routines that
3776 deal with the inferior a little smarter, and possibly even allow
3777 an inferior to continue running at the same time as gdb. (FIXME?) */
3778 signal_to_pass = 0;
3779 else if (signo == TARGET_SIGNAL_TSTP
3780 #ifdef UNIXWARE
3781 && pi->prstatus.pr_lwp.pr_cursig == SIGTSTP
3782 && pi->prstatus.pr_lwp.pr_action.sa_handler == SIG_DFL
3783 #else
3784 && pi->prstatus.pr_cursig == SIGTSTP
3785 && pi->prstatus.pr_action.sa_handler == SIG_DFL
3786 #endif
3787 )
3788
3789 /* We are about to pass the inferior a SIGTSTP whose action is
3790 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3791 (notifying the parent via wait()), and then keep going from the
3792 same place when the parent is ready for you to keep going. So
3793 under the debugger, it should do nothing (as if the program had
3794 been stopped and then later resumed. Under ptrace, this
3795 happens for us, but under /proc, the system obligingly stops
3796 the process, and wait_for_inferior would have no way of
3797 distinguishing that type of stop (which indicates that we
3798 should just start it again), with a stop due to the pr_trace
3799 field of the prrun_t struct.
3800
3801 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3802 because the handler needs to get executed. */
3803 signal_to_pass = 0;
3804 else
3805 signal_to_pass = target_signal_to_host (signo);
3806
3807 if (signal_to_pass)
3808 {
3809 set_proc_siginfo (pi, signal_to_pass);
3810 }
3811 else
3812 {
3813 #ifdef UNIXWARE
3814 pctl.data |= PRCSIG;
3815 #else
3816 pi->prrun.pr_flags |= PRCSIG;
3817 #endif
3818 }
3819 pi->nopass_next_sigstop = 0;
3820 if (step)
3821 {
3822 #ifdef UNIXWARE
3823 pctl.data |= PRSTEP;
3824 #else
3825 pi->prrun.pr_flags |= PRSTEP;
3826 #endif
3827 }
3828 pi->had_event = 0;
3829 /* Don't try to start a process unless it's stopped on an
3830 `event of interest'. Doing so will cause errors. */
3831
3832 if (!procfs_read_status (pi))
3833 {
3834 /* The LWP has apparently terminated. */
3835 if (info_verbose)
3836 printf_filtered ("LWP %d doesn't respond.\n",
3837 (pi->pid >> 16) & 0xffff);
3838 close_proc_file (pi);
3839 }
3840 else
3841 {
3842 #ifdef PROCFS_USE_READ_WRITE
3843 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
3844 #else
3845 if ((pi->prstatus.pr_flags & PR_ISTOP)
3846 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
3847 #endif
3848 {
3849 /* The LWP has apparently terminated. */
3850 if (info_verbose)
3851 printf_filtered ("LWP %d doesn't respond.\n",
3852 (pi->pid >> 16) & 0xffff);
3853 close_proc_file (pi);
3854 }
3855 }
3856
3857 /* Continue all the other threads that haven't had an event of interest.
3858 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3859 set by do_attach, and means this is the first resume after an attach.
3860 All threads were CSTOP'd by do_attach, and should be resumed now. */
3861
3862 if (pid == -1)
3863 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3864 {
3865 next_pi = procinfo->next;
3866 if (pi != procinfo)
3867 if (!procinfo->had_event ||
3868 (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
3869 {
3870 procinfo->had_event = procinfo->nopass_next_sigstop = 0;
3871 #ifdef PROCFS_USE_READ_WRITE
3872 pctl.data = PRCFAULT | PRCSIG;
3873 if (write (procinfo->ctl_fd, (char *) &pctl,
3874 sizeof (struct proc_ctl)) < 0)
3875 {
3876 if (!procfs_read_status (procinfo))
3877 fprintf_unfiltered(gdb_stderr,
3878 "procfs_read_status failed, errno=%d\n",
3879 errno);
3880 print_sys_errmsg (procinfo->pathname, errno);
3881 error ("PCRUN failed");
3882 }
3883 #else
3884 procinfo->prrun.pr_flags &= PRSTEP;
3885 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
3886 if (!procfs_read_status (procinfo))
3887 {
3888 /* The LWP has apparently terminated. */
3889 if (info_verbose)
3890 printf_filtered ("LWP %d doesn't respond.\n",
3891 (procinfo->pid >> 16) & 0xffff);
3892 close_proc_file (procinfo);
3893 continue;
3894 }
3895
3896 /* Don't try to start a process unless it's stopped on an
3897 `event of interest'. Doing so will cause errors. */
3898
3899 if ((procinfo->prstatus.pr_flags & PR_ISTOP)
3900 && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
3901 {
3902 if (!procfs_read_status (procinfo))
3903 fprintf_unfiltered(gdb_stderr,
3904 "procfs_read_status failed, errno=%d\n",
3905 errno);
3906 print_sys_errmsg (procinfo->pathname, errno);
3907 warning ("PIOCRUN failed");
3908 }
3909 #endif
3910 }
3911 procfs_read_status (procinfo);
3912 }
3913 }
3914
3915 /*
3916
3917 LOCAL FUNCTION
3918
3919 procfs_fetch_registers -- fetch current registers from inferior
3920
3921 SYNOPSIS
3922
3923 void procfs_fetch_registers (int regno)
3924
3925 DESCRIPTION
3926
3927 Read the current values of the inferior's registers, both the
3928 general register set and floating point registers (if supported)
3929 and update gdb's idea of their current values.
3930
3931 */
3932
3933 static void
3934 procfs_fetch_registers (regno)
3935 int regno;
3936 {
3937 struct procinfo *pi;
3938
3939 pi = current_procinfo;
3940
3941 #ifdef UNIXWARE
3942 if (procfs_read_status (pi))
3943 {
3944 supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
3945 #if defined (FP0_REGNUM)
3946 supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs);
3947 #endif
3948 }
3949 #else /* UNIXWARE */
3950 if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1)
3951 {
3952 supply_gregset (&pi->gregset.gregset);
3953 }
3954 #if defined (FP0_REGNUM)
3955 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1)
3956 {
3957 supply_fpregset (&pi->fpregset.fpregset);
3958 }
3959 #endif
3960 #endif /* UNIXWARE */
3961 }
3962
3963 /*
3964
3965 LOCAL FUNCTION
3966
3967 proc_init_failed - called when /proc access initialization fails
3968 fails
3969
3970 SYNOPSIS
3971
3972 static void proc_init_failed (struct procinfo *pi,
3973 char *why, int kill_p)
3974
3975 DESCRIPTION
3976
3977 This function is called whenever initialization of access to a /proc
3978 entry fails. It prints a suitable error message, does some cleanup,
3979 and then invokes the standard error processing routine which dumps
3980 us back into the command loop. If KILL_P is true, sends SIGKILL.
3981 */
3982
3983 static void
3984 proc_init_failed (pi, why, kill_p)
3985 struct procinfo *pi;
3986 char *why;
3987 int kill_p;
3988 {
3989 print_sys_errmsg (pi->pathname, errno);
3990 if (kill_p)
3991 kill (pi->pid, SIGKILL);
3992 close_proc_file (pi);
3993 error (why);
3994 /* NOTREACHED */
3995 }
3996
3997 /*
3998
3999 LOCAL FUNCTION
4000
4001 close_proc_file - close any currently open /proc entry
4002
4003 SYNOPSIS
4004
4005 static void close_proc_file (struct procinfo *pip)
4006
4007 DESCRIPTION
4008
4009 Close any currently open /proc entry and mark the process information
4010 entry as invalid. In order to ensure that we don't try to reuse any
4011 stale information, the pid, fd, and pathnames are explicitly
4012 invalidated, which may be overkill.
4013
4014 */
4015
4016 static void
4017 close_proc_file (pip)
4018 struct procinfo *pip;
4019 {
4020 struct procinfo *procinfo;
4021
4022 delete_thread (pip->pid); /* remove thread from GDB's thread list */
4023 remove_fd (pip); /* Remove fd from poll/select list */
4024
4025 close (pip->ctl_fd);
4026 #ifdef HAVE_MULTIPLE_PROC_FDS
4027 close (pip->as_fd);
4028 close (pip->status_fd);
4029 close (pip->map_fd);
4030 #endif
4031
4032 free (pip -> pathname);
4033
4034 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4035
4036 if (procinfo_list == pip)
4037 procinfo_list = pip->next;
4038 else
4039 {
4040 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
4041 {
4042 if (procinfo->next == pip)
4043 {
4044 procinfo->next = pip->next;
4045 break;
4046 }
4047 }
4048 free (pip);
4049 }
4050 }
4051
4052 /*
4053
4054 LOCAL FUNCTION
4055
4056 open_proc_file - open a /proc entry for a given process id
4057
4058 SYNOPSIS
4059
4060 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4061
4062 DESCRIPTION
4063
4064 Given a process id and a mode, close the existing open /proc
4065 entry (if any) and open one for the new process id, in the
4066 specified mode. Once it is open, then mark the local process
4067 information structure as valid, which guarantees that the pid,
4068 fd, and pathname fields match an open /proc entry. Returns
4069 zero if the open fails, nonzero otherwise.
4070
4071 Note that the pathname is left intact, even when the open fails,
4072 so that callers can use it to construct meaningful error messages
4073 rather than just "file open failed".
4074
4075 Note that for Solaris, the process-id also includes an LWP-id, so we
4076 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4077 then we will ask the kernel what it is and add it to the pid. Hence,
4078 the pid can be changed by us.
4079 */
4080
4081 static int
4082 open_proc_file (pid, pip, mode, control)
4083 int pid;
4084 struct procinfo *pip;
4085 int mode;
4086 int control;
4087 {
4088 int tmp, tmpfd;
4089
4090 pip -> next = NULL;
4091 pip -> had_event = 0;
4092 pip -> pathname = xmalloc (MAX_PROC_NAME_SIZE);
4093 pip -> pid = pid;
4094
4095 #ifndef PIOCOPENLWP
4096 tmp = pid;
4097 #else
4098 tmp = pid & 0xffff;
4099 #endif
4100
4101 #ifdef HAVE_MULTIPLE_PROC_FDS
4102 sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp);
4103 if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0)
4104 {
4105 return 0;
4106 }
4107
4108 sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp);
4109 if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0)
4110 {
4111 close (pip->status_fd);
4112 return 0;
4113 }
4114
4115 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4116 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4117 {
4118 close (pip->status_fd);
4119 close (pip->as_fd);
4120 return 0;
4121 }
4122
4123 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4124 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4125 {
4126 close (pip->status_fd);
4127 close (pip->as_fd);
4128 return 0;
4129 }
4130
4131 if (control)
4132 {
4133 sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
4134 if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0)
4135 {
4136 close (pip->status_fd);
4137 close (pip->as_fd);
4138 close (pip->map_fd);
4139 return 0;
4140 }
4141 }
4142
4143 #else /* HAVE_MULTIPLE_PROC_FDS */
4144 sprintf (pip -> pathname, CTL_PROC_NAME_FMT, tmp);
4145
4146 if ((tmpfd = open (pip -> pathname, mode)) < 0)
4147 return 0;
4148
4149 #ifndef PIOCOPENLWP
4150 pip -> ctl_fd = tmpfd;
4151 pip -> as_fd = tmpfd;
4152 pip -> map_fd = tmpfd;
4153 pip -> status_fd = tmpfd;
4154 #else
4155 tmp = (pid >> 16) & 0xffff; /* Extract thread id */
4156
4157 if (tmp == 0)
4158 { /* Don't know thread id yet */
4159 if (ioctl (tmpfd, PIOCSTATUS, &pip -> prstatus) < 0)
4160 {
4161 print_sys_errmsg (pip -> pathname, errno);
4162 close (tmpfd);
4163 error ("open_proc_file: PIOCSTATUS failed");
4164 }
4165
4166 tmp = pip -> prstatus.pr_who; /* Get thread id from prstatus_t */
4167 pip -> pid = (tmp << 16) | pid; /* Update pip */
4168 }
4169
4170 if ((pip -> ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0)
4171 {
4172 close (tmpfd);
4173 return 0;
4174 }
4175
4176 #ifdef PIOCSET /* New method */
4177 {
4178 long pr_flags;
4179 pr_flags = PR_ASYNC;
4180 ioctl (pip -> ctl_fd, PIOCSET, &pr_flags);
4181 }
4182 #endif
4183
4184 /* keep extra fds in sync */
4185 pip->as_fd = pip->ctl_fd;
4186 pip->map_fd = pip->ctl_fd;
4187 pip->status_fd = pip->ctl_fd;
4188
4189 close (tmpfd); /* All done with main pid */
4190 #endif /* PIOCOPENLWP */
4191
4192 #endif /* HAVE_MULTIPLE_PROC_FDS */
4193
4194 return 1;
4195 }
4196
4197 static char *
4198 mappingflags (flags)
4199 long flags;
4200 {
4201 static char asciiflags[8];
4202
4203 strcpy (asciiflags, "-------");
4204 #if defined (MA_PHYS)
4205 if (flags & MA_PHYS) asciiflags[0] = 'd';
4206 #endif
4207 if (flags & MA_STACK) asciiflags[1] = 's';
4208 if (flags & MA_BREAK) asciiflags[2] = 'b';
4209 if (flags & MA_SHARED) asciiflags[3] = 's';
4210 if (flags & MA_READ) asciiflags[4] = 'r';
4211 if (flags & MA_WRITE) asciiflags[5] = 'w';
4212 if (flags & MA_EXEC) asciiflags[6] = 'x';
4213 return (asciiflags);
4214 }
4215
4216 static void
4217 info_proc_flags (pip, summary)
4218 struct procinfo *pip;
4219 int summary;
4220 {
4221 struct trans *transp;
4222 #ifdef UNIXWARE
4223 long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags;
4224 #else
4225 long flags = pip->prstatus.pr_flags;
4226 #endif
4227
4228 printf_filtered ("%-32s", "Process status flags:");
4229 if (!summary)
4230 {
4231 printf_filtered ("\n\n");
4232 }
4233 for (transp = pr_flag_table; transp -> name != NULL; transp++)
4234 {
4235 if (flags & transp -> value)
4236 {
4237 if (summary)
4238 {
4239 printf_filtered ("%s ", transp -> name);
4240 }
4241 else
4242 {
4243 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
4244 }
4245 }
4246 }
4247 printf_filtered ("\n");
4248 }
4249
4250 static void
4251 info_proc_stop (pip, summary)
4252 struct procinfo *pip;
4253 int summary;
4254 {
4255 struct trans *transp;
4256 int why;
4257 int what;
4258
4259 #ifdef UNIXWARE
4260 why = pip -> prstatus.pr_lwp.pr_why;
4261 what = pip -> prstatus.pr_lwp.pr_what;
4262 #else
4263 why = pip -> prstatus.pr_why;
4264 what = pip -> prstatus.pr_what;
4265 #endif
4266
4267 #ifdef UNIXWARE
4268 if (pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED)
4269 #else
4270 if (pip -> prstatus.pr_flags & PR_STOPPED)
4271 #endif
4272 {
4273 printf_filtered ("%-32s", "Reason for stopping:");
4274 if (!summary)
4275 {
4276 printf_filtered ("\n\n");
4277 }
4278 for (transp = pr_why_table; transp -> name != NULL; transp++)
4279 {
4280 if (why == transp -> value)
4281 {
4282 if (summary)
4283 {
4284 printf_filtered ("%s ", transp -> name);
4285 }
4286 else
4287 {
4288 printf_filtered ("\t%-16s %s.\n",
4289 transp -> name, transp -> desc);
4290 }
4291 break;
4292 }
4293 }
4294
4295 /* Use the pr_why field to determine what the pr_what field means, and
4296 print more information. */
4297
4298 switch (why)
4299 {
4300 case PR_REQUESTED:
4301 /* pr_what is unused for this case */
4302 break;
4303 case PR_JOBCONTROL:
4304 case PR_SIGNALLED:
4305 if (summary)
4306 {
4307 printf_filtered ("%s ", signalname (what));
4308 }
4309 else
4310 {
4311 printf_filtered ("\t%-16s %s.\n", signalname (what),
4312 safe_strsignal (what));
4313 }
4314 break;
4315 case PR_SYSENTRY:
4316 if (summary)
4317 {
4318 printf_filtered ("%s ", syscallname (what));
4319 }
4320 else
4321 {
4322 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4323 "Entered this system call");
4324 }
4325 break;
4326 case PR_SYSEXIT:
4327 if (summary)
4328 {
4329 printf_filtered ("%s ", syscallname (what));
4330 }
4331 else
4332 {
4333 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4334 "Returned from this system call");
4335 }
4336 break;
4337 case PR_FAULTED:
4338 if (summary)
4339 {
4340 printf_filtered ("%s ",
4341 lookupname (faults_table, what, "fault"));
4342 }
4343 else
4344 {
4345 printf_filtered ("\t%-16s %s.\n",
4346 lookupname (faults_table, what, "fault"),
4347 lookupdesc (faults_table, what));
4348 }
4349 break;
4350 }
4351 printf_filtered ("\n");
4352 }
4353 }
4354
4355 static void
4356 info_proc_siginfo (pip, summary)
4357 struct procinfo *pip;
4358 int summary;
4359 {
4360 struct siginfo *sip;
4361
4362 #ifdef UNIXWARE
4363 if ((pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED) &&
4364 (pip -> prstatus.pr_lwp.pr_why == PR_SIGNALLED ||
4365 pip -> prstatus.pr_lwp.pr_why == PR_FAULTED))
4366 #else
4367 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
4368 (pip -> prstatus.pr_why == PR_SIGNALLED ||
4369 pip -> prstatus.pr_why == PR_FAULTED))
4370 #endif
4371 {
4372 printf_filtered ("%-32s", "Additional signal/fault info:");
4373 #ifdef UNIXWARE
4374 sip = &pip -> prstatus.pr_lwp.pr_info;
4375 #else
4376 sip = &pip -> prstatus.pr_info;
4377 #endif
4378 if (summary)
4379 {
4380 printf_filtered ("%s ", signalname (sip -> si_signo));
4381 if (sip -> si_errno > 0)
4382 {
4383 printf_filtered ("%s ", errnoname (sip -> si_errno));
4384 }
4385 if (sip -> si_code <= 0)
4386 {
4387 printf_filtered ("sent by %s, uid %d ",
4388 target_pid_to_str (sip -> si_pid),
4389 sip -> si_uid);
4390 }
4391 else
4392 {
4393 printf_filtered ("%s ", sigcodename (sip));
4394 if ((sip -> si_signo == SIGILL) ||
4395 (sip -> si_signo == SIGFPE) ||
4396 (sip -> si_signo == SIGSEGV) ||
4397 (sip -> si_signo == SIGBUS))
4398 {
4399 printf_filtered ("addr=%#lx ",
4400 (unsigned long) sip -> si_addr);
4401 }
4402 else if ((sip -> si_signo == SIGCHLD))
4403 {
4404 printf_filtered ("child %s, status %u ",
4405 target_pid_to_str (sip -> si_pid),
4406 sip -> si_status);
4407 }
4408 else if ((sip -> si_signo == SIGPOLL))
4409 {
4410 printf_filtered ("band %u ", sip -> si_band);
4411 }
4412 }
4413 }
4414 else
4415 {
4416 printf_filtered ("\n\n");
4417 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
4418 safe_strsignal (sip -> si_signo));
4419 if (sip -> si_errno > 0)
4420 {
4421 printf_filtered ("\t%-16s %s.\n",
4422 errnoname (sip -> si_errno),
4423 safe_strerror (sip -> si_errno));
4424 }
4425 if (sip -> si_code <= 0)
4426 {
4427 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
4428 "PID of process sending signal");
4429 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
4430 "UID of process sending signal");
4431 }
4432 else
4433 {
4434 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
4435 sigcodedesc (sip));
4436 if ((sip -> si_signo == SIGILL) ||
4437 (sip -> si_signo == SIGFPE))
4438 {
4439 printf_filtered ("\t%#-16lx %s.\n",
4440 (unsigned long) sip -> si_addr,
4441 "Address of faulting instruction");
4442 }
4443 else if ((sip -> si_signo == SIGSEGV) ||
4444 (sip -> si_signo == SIGBUS))
4445 {
4446 printf_filtered ("\t%#-16lx %s.\n",
4447 (unsigned long) sip -> si_addr,
4448 "Address of faulting memory reference");
4449 }
4450 else if ((sip -> si_signo == SIGCHLD))
4451 {
4452 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
4453 "Child process ID");
4454 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
4455 "Child process exit value or signal");
4456 }
4457 else if ((sip -> si_signo == SIGPOLL))
4458 {
4459 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
4460 "Band event for POLL_{IN,OUT,MSG}");
4461 }
4462 }
4463 }
4464 printf_filtered ("\n");
4465 }
4466 }
4467
4468 static void
4469 info_proc_syscalls (pip, summary)
4470 struct procinfo *pip;
4471 int summary;
4472 {
4473 int syscallnum;
4474
4475 if (!summary)
4476 {
4477
4478 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4479 if (pip -> prstatus.pr_flags & PR_ASLEEP)
4480 {
4481 int syscallnum = pip -> prstatus.pr_reg[R_D0];
4482 if (summary)
4483 {
4484 printf_filtered ("%-32s", "Sleeping in system call:");
4485 printf_filtered ("%s", syscallname (syscallnum));
4486 }
4487 else
4488 {
4489 printf_filtered ("Sleeping in system call '%s'.\n",
4490 syscallname (syscallnum));
4491 }
4492 }
4493 #endif
4494
4495 #ifndef UNIXWARE
4496 if (ioctl (pip -> ctl_fd, PIOCGENTRY, &pip -> entryset) < 0)
4497 {
4498 print_sys_errmsg (pip -> pathname, errno);
4499 error ("PIOCGENTRY failed");
4500 }
4501
4502 if (ioctl (pip -> ctl_fd, PIOCGEXIT, &pip -> exitset) < 0)
4503 {
4504 print_sys_errmsg (pip -> pathname, errno);
4505 error ("PIOCGEXIT failed");
4506 }
4507 #endif
4508
4509 printf_filtered ("System call tracing information:\n\n");
4510
4511 printf_filtered ("\t%-12s %-8s %-8s\n",
4512 "System call",
4513 "Entry",
4514 "Exit");
4515 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
4516 {
4517 QUIT;
4518 if (syscall_table[syscallnum] != NULL)
4519 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
4520 else
4521 printf_filtered ("\t%-12d ", syscallnum);
4522
4523 #ifdef UNIXWARE
4524 printf_filtered ("%-8s ",
4525 prismember (&pip->prstatus.pr_sysentry, syscallnum)
4526 ? "on" : "off");
4527 printf_filtered ("%-8s ",
4528 prismember (&pip->prstatus.pr_sysexit, syscallnum)
4529 ? "on" : "off");
4530 #else
4531 printf_filtered ("%-8s ",
4532 prismember (&pip -> entryset, syscallnum)
4533 ? "on" : "off");
4534 printf_filtered ("%-8s ",
4535 prismember (&pip -> exitset, syscallnum)
4536 ? "on" : "off");
4537 #endif
4538 printf_filtered ("\n");
4539 }
4540 printf_filtered ("\n");
4541 }
4542 }
4543
4544 static char *
4545 signalname (signo)
4546 int signo;
4547 {
4548 const char *name;
4549 static char locbuf[32];
4550
4551 name = strsigno (signo);
4552 if (name == NULL)
4553 {
4554 sprintf (locbuf, "Signal %d", signo);
4555 }
4556 else
4557 {
4558 sprintf (locbuf, "%s (%d)", name, signo);
4559 }
4560 return (locbuf);
4561 }
4562
4563 static char *
4564 errnoname (errnum)
4565 int errnum;
4566 {
4567 const char *name;
4568 static char locbuf[32];
4569
4570 name = strerrno (errnum);
4571 if (name == NULL)
4572 {
4573 sprintf (locbuf, "Errno %d", errnum);
4574 }
4575 else
4576 {
4577 sprintf (locbuf, "%s (%d)", name, errnum);
4578 }
4579 return (locbuf);
4580 }
4581
4582 static void
4583 info_proc_signals (pip, summary)
4584 struct procinfo *pip;
4585 int summary;
4586 {
4587 int signo;
4588
4589 if (!summary)
4590 {
4591 #ifndef PROCFS_USE_READ_WRITE
4592 if (ioctl (pip -> ctl_fd, PIOCGTRACE, &pip -> trace) < 0)
4593 {
4594 print_sys_errmsg (pip -> pathname, errno);
4595 error ("PIOCGTRACE failed");
4596 }
4597 #endif
4598
4599 printf_filtered ("Disposition of signals:\n\n");
4600 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4601 "Signal", "Trace", "Hold", "Pending", "Description");
4602 for (signo = 0; signo < NSIG; signo++)
4603 {
4604 QUIT;
4605 printf_filtered ("\t%-15s ", signalname (signo));
4606 #ifdef UNIXWARE
4607 printf_filtered ("%-8s ",
4608 prismember (&pip -> prstatus.pr_sigtrace, signo)
4609 ? "on" : "off");
4610 printf_filtered ("%-8s ",
4611 prismember (&pip -> prstatus.pr_lwp.pr_context.uc_sigmask, signo)
4612 ? "on" : "off");
4613 #else
4614 printf_filtered ("%-8s ",
4615 prismember (&pip -> trace, signo)
4616 ? "on" : "off");
4617 printf_filtered ("%-8s ",
4618 prismember (&pip -> prstatus.pr_sighold, signo)
4619 ? "on" : "off");
4620 #endif
4621
4622 #ifdef UNIXWARE
4623 if (prismember (&pip->prstatus.pr_sigpend, signo) ||
4624 prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo))
4625 printf_filtered("%-8s ", "yes");
4626 else
4627 printf_filtered("%-8s ", "no");
4628 #else /* UNIXWARE */
4629 #ifdef PROCFS_SIGPEND_OFFSET
4630 /* Alpha OSF/1 numbers the pending signals from 1. */
4631 printf_filtered ("%-8s ",
4632 (signo ? prismember (&pip -> prstatus.pr_sigpend,
4633 signo - 1)
4634 : 0)
4635 ? "yes" : "no");
4636 #else
4637 printf_filtered ("%-8s ",
4638 prismember (&pip -> prstatus.pr_sigpend, signo)
4639 ? "yes" : "no");
4640 #endif
4641 #endif /* UNIXWARE */
4642 printf_filtered (" %s\n", safe_strsignal (signo));
4643 }
4644 printf_filtered ("\n");
4645 }
4646 }
4647
4648 static void
4649 info_proc_faults (pip, summary)
4650 struct procinfo *pip;
4651 int summary;
4652 {
4653 struct trans *transp;
4654
4655 if (!summary)
4656 {
4657 #ifndef UNIXWARE
4658 if (ioctl (pip -> ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0)
4659 {
4660 print_sys_errmsg (pip -> pathname, errno);
4661 error ("PIOCGFAULT failed");
4662 }
4663 #endif
4664
4665 printf_filtered ("Current traced hardware fault set:\n\n");
4666 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4667
4668 for (transp = faults_table; transp -> name != NULL; transp++)
4669 {
4670 QUIT;
4671 printf_filtered ("\t%-12s ", transp -> name);
4672 #ifdef UNIXWARE
4673 printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp -> value)
4674 ? "on" : "off");
4675 #else
4676 printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp -> value)
4677 ? "on" : "off");
4678 #endif
4679 printf_filtered ("\n");
4680 }
4681 printf_filtered ("\n");
4682 }
4683 }
4684
4685 static void
4686 info_proc_mappings (pip, summary)
4687 struct procinfo *pip;
4688 int summary;
4689 {
4690 int nmap;
4691 struct prmap *prmaps;
4692 struct prmap *prmap;
4693 struct stat sbuf;
4694
4695 if (!summary)
4696 {
4697 printf_filtered ("Mapped address spaces:\n\n");
4698 #ifdef BFD_HOST_64_BIT
4699 printf_filtered (" %18s %18s %10s %10s %7s\n",
4700 #else
4701 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4702 #endif
4703 "Start Addr",
4704 " End Addr",
4705 " Size",
4706 " Offset",
4707 "Flags");
4708 #ifdef PROCFS_USE_READ_WRITE
4709 if (fstat (pip->map_fd, &sbuf) == 0)
4710 {
4711 nmap = sbuf.st_size / sizeof (prmap_t);
4712 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4713 if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) &&
4714 (read (pip->map_fd, (char *) prmaps,
4715 nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps))))
4716 {
4717 int i = 0;
4718 for (prmap = prmaps; i < nmap; ++prmap, ++i)
4719 #else
4720 if (ioctl (pip -> ctl_fd, PIOCNMAP, &nmap) == 0)
4721 {
4722 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4723 if (ioctl (pip -> ctl_fd, PIOCMAP, prmaps) == 0)
4724 {
4725 for (prmap = prmaps; prmap -> pr_size; ++prmap)
4726 #endif /* PROCFS_USE_READ_WRITE */
4727 {
4728 #ifdef BFD_HOST_64_BIT
4729 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4730 #else
4731 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4732 #endif
4733 (unsigned long)prmap -> pr_vaddr,
4734 (unsigned long)prmap -> pr_vaddr
4735 + prmap -> pr_size - 1,
4736 prmap -> pr_size,
4737 prmap -> pr_off,
4738 mappingflags (prmap -> pr_mflags));
4739 }
4740 }
4741 }
4742 printf_filtered ("\n");
4743 }
4744 }
4745
4746 /*
4747
4748 LOCAL FUNCTION
4749
4750 info_proc -- implement the "info proc" command
4751
4752 SYNOPSIS
4753
4754 void info_proc (char *args, int from_tty)
4755
4756 DESCRIPTION
4757
4758 Implement gdb's "info proc" command by using the /proc interface
4759 to print status information about any currently running process.
4760
4761 Examples of the use of "info proc" are:
4762
4763 info proc (prints summary info for current inferior)
4764 info proc 123 (prints summary info for process with pid 123)
4765 info proc mappings (prints address mappings)
4766 info proc times (prints process/children times)
4767 info proc id (prints pid, ppid, gid, sid, etc)
4768 FIXME: i proc id not implemented.
4769 info proc status (prints general process state info)
4770 FIXME: i proc status not implemented.
4771 info proc signals (prints info about signal handling)
4772 info proc all (prints all info)
4773
4774 */
4775
4776 static void
4777 info_proc (args, from_tty)
4778 char *args;
4779 int from_tty;
4780 {
4781 int pid;
4782 struct procinfo *pip;
4783 struct cleanup *old_chain;
4784 char **argv;
4785 int argsize;
4786 int summary = 1;
4787 int flags = 0;
4788 int syscalls = 0;
4789 int signals = 0;
4790 int faults = 0;
4791 int mappings = 0;
4792 int times = 0;
4793 int id = 0;
4794 int status = 0;
4795 int all = 0;
4796 int nlwp;
4797 int *lwps;
4798
4799 old_chain = make_cleanup (null_cleanup, 0);
4800
4801 /* Default to using the current inferior if no pid specified. Note
4802 that inferior_pid may be 0, hence we set okerr. */
4803
4804 pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
4805 if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
4806 pip = procinfo_list; /* take first available */
4807 pid = pid & 0xffff; /* extract "real" pid */
4808
4809 if (args != NULL)
4810 {
4811 if ((argv = buildargv (args)) == NULL)
4812 {
4813 nomem (0);
4814 }
4815 make_cleanup (freeargv, (char *) argv);
4816
4817 while (*argv != NULL)
4818 {
4819 argsize = strlen (*argv);
4820 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
4821 {
4822 summary = 0;
4823 all = 1;
4824 }
4825 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
4826 {
4827 summary = 0;
4828 faults = 1;
4829 }
4830 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
4831 {
4832 summary = 0;
4833 flags = 1;
4834 }
4835 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
4836 {
4837 summary = 0;
4838 id = 1;
4839 }
4840 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
4841 {
4842 summary = 0;
4843 mappings = 1;
4844 }
4845 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
4846 {
4847 summary = 0;
4848 signals = 1;
4849 }
4850 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
4851 {
4852 summary = 0;
4853 status = 1;
4854 }
4855 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
4856 {
4857 summary = 0;
4858 syscalls = 1;
4859 }
4860 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
4861 {
4862 summary = 0;
4863 times = 1;
4864 }
4865 else if ((pid = atoi (*argv)) > 0)
4866 {
4867 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4868 memset (pip, 0, sizeof (*pip));
4869
4870 pip->pid = pid;
4871 if (!open_proc_file (pid, pip, O_RDONLY, 0))
4872 {
4873 perror_with_name (pip -> pathname);
4874 /* NOTREACHED */
4875 }
4876 pid = pip->pid;
4877 make_cleanup (close_proc_file, pip);
4878 }
4879 else if (**argv != '\000')
4880 {
4881 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
4882 }
4883 argv++;
4884 }
4885 }
4886
4887 /* If we don't have a valid open process at this point, then we have no
4888 inferior or didn't specify a specific pid. */
4889
4890 if (!pip)
4891 {
4892 error ("\
4893 No process. Start debugging a program or specify an explicit process ID.");
4894 }
4895
4896 if (!procfs_read_status (pip))
4897 {
4898 print_sys_errmsg (pip -> pathname, errno);
4899 error ("procfs_read_status failed");
4900 }
4901
4902 #ifndef PROCFS_USE_READ_WRITE
4903 #ifdef PIOCLWPIDS
4904 nlwp = pip->prstatus.pr_nlwp;
4905 lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
4906
4907 if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
4908 {
4909 print_sys_errmsg (pip -> pathname, errno);
4910 error ("PIOCLWPIDS failed");
4911 }
4912 #else /* PIOCLWPIDS */
4913 nlwp = 1;
4914 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
4915 lwps[0] = 0;
4916 #endif /* PIOCLWPIDS */
4917
4918 for (; nlwp > 0; nlwp--, lwps++)
4919 {
4920 pip = find_procinfo ((*lwps << 16) | pid, 1);
4921
4922 if (!pip)
4923 {
4924 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4925 memset (pip, 0, sizeof (*pip));
4926 if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0))
4927 continue;
4928
4929 make_cleanup (close_proc_file, pip);
4930
4931 if (!procfs_read_status (pip))
4932 {
4933 print_sys_errmsg (pip -> pathname, errno);
4934 error ("procfs_read_status failed");
4935 }
4936 }
4937
4938 #endif /* PROCFS_USE_READ_WRITE */
4939
4940 /* Print verbose information of the requested type(s), or just a summary
4941 of the information for all types. */
4942
4943 printf_filtered ("\nInformation for %s.%d:\n\n", pip -> pathname, *lwps);
4944 if (summary || all || flags)
4945 {
4946 info_proc_flags (pip, summary);
4947 }
4948 if (summary || all)
4949 {
4950 info_proc_stop (pip, summary);
4951 #ifdef UNIXWARE
4952 supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
4953 #else
4954 supply_gregset (&pip->prstatus.pr_reg);
4955 #endif
4956 printf_filtered ("PC: ");
4957 print_address (read_pc (), gdb_stdout);
4958 printf_filtered ("\n");
4959 }
4960 if (summary || all || signals || faults)
4961 {
4962 info_proc_siginfo (pip, summary);
4963 }
4964 if (summary || all || syscalls)
4965 {
4966 info_proc_syscalls (pip, summary);
4967 }
4968 if (summary || all || mappings)
4969 {
4970 info_proc_mappings (pip, summary);
4971 }
4972 if (summary || all || signals)
4973 {
4974 info_proc_signals (pip, summary);
4975 }
4976 if (summary || all || faults)
4977 {
4978 info_proc_faults (pip, summary);
4979 }
4980 printf_filtered ("\n");
4981
4982 /* All done, deal with closing any temporary process info structure,
4983 freeing temporary memory , etc. */
4984
4985 do_cleanups (old_chain);
4986 #ifndef PROCFS_USE_READ_WRITE
4987 }
4988 #endif
4989 }
4990
4991 /*
4992
4993 LOCAL FUNCTION
4994
4995 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
4996
4997 SYNOPSIS
4998
4999 void modify_inherit_on_fork_flag (fd, flag)
5000
5001 DESCRIPTION
5002
5003 Call this routine to modify the inherit-on-fork flag. This routine is
5004 just a nice wrapper to hide the #ifdefs needed by various systems to
5005 control this flag.
5006
5007 */
5008
5009 static void
5010 modify_inherit_on_fork_flag (fd, flag)
5011 int fd;
5012 int flag;
5013 {
5014 #if defined (PIOCSET) || defined (PCSET)
5015 long pr_flags;
5016 #endif
5017 int retval = 0;
5018 struct proc_ctl pctl;
5019
5020 #if defined (PIOCSET) || defined (PCSET) /* New method */
5021 pr_flags = PR_FORK;
5022 if (flag)
5023 {
5024 #ifdef PROCFS_USE_READ_WRITE
5025 pctl.cmd = PCSET;
5026 pctl.data = PR_FORK;
5027 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5028 retval = -1;
5029 #else
5030 retval = ioctl (fd, PIOCSET, &pr_flags);
5031 #endif
5032 }
5033 else
5034 {
5035 #ifdef PROCFS_USE_READ_WRITE
5036 pctl.cmd = PCRESET;
5037 pctl.data = PR_FORK;
5038 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5039 retval = -1;
5040 #else
5041 retval = ioctl (fd, PIOCRESET, &pr_flags);
5042 #endif
5043 }
5044
5045 #else
5046 #ifdef PIOCSFORK /* Original method */
5047 if (flag)
5048 {
5049 retval = ioctl (fd, PIOCSFORK, NULL);
5050 }
5051 else
5052 {
5053 retval = ioctl (fd, PIOCRFORK, NULL);
5054 }
5055 #else
5056 Neither PR_FORK nor PIOCSFORK exist!!!
5057 #endif
5058 #endif
5059
5060 if (!retval)
5061 return;
5062
5063 print_sys_errmsg ("modify_inherit_on_fork_flag", errno);
5064 error ("PIOCSFORK or PR_FORK modification failed");
5065 }
5066
5067 /*
5068
5069 LOCAL FUNCTION
5070
5071 modify_run_on_last_close_flag - Change the run-on-last-close flag
5072
5073 SYNOPSIS
5074
5075 void modify_run_on_last_close_flag (fd, flag)
5076
5077 DESCRIPTION
5078
5079 Call this routine to modify the run-on-last-close flag. This routine
5080 is just a nice wrapper to hide the #ifdefs needed by various systems to
5081 control this flag.
5082
5083 */
5084
5085 static void
5086 modify_run_on_last_close_flag (fd, flag)
5087 int fd;
5088 int flag;
5089 {
5090 #if defined (PIOCSET) || defined (PCSET)
5091 long pr_flags;
5092 #endif
5093 int retval = 0;
5094 struct proc_ctl pctl;
5095
5096 #if defined (PIOCSET) || defined (PCSET) /* New method */
5097 pr_flags = PR_RLC;
5098 if (flag)
5099 {
5100 #ifdef PROCFS_USE_READ_WRITE
5101 pctl.cmd = PCSET;
5102 pctl.data = PR_RLC;
5103 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5104 retval = -1;
5105 #else
5106 retval = ioctl (fd, PIOCSET, &pr_flags);
5107 #endif
5108 }
5109 else
5110 {
5111 #ifdef PROCFS_USE_READ_WRITE
5112 pctl.cmd = PCRESET;
5113 pctl.data = PR_RLC;
5114 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5115 retval = -1;
5116 #else
5117 retval = ioctl (fd, PIOCRESET, &pr_flags);
5118 #endif
5119 }
5120
5121 #else
5122 #ifdef PIOCSRLC /* Original method */
5123 if (flag)
5124 retval = ioctl (fd, PIOCSRLC, NULL);
5125 else
5126 retval = ioctl (fd, PIOCRRLC, NULL);
5127 #else
5128 Neither PR_RLC nor PIOCSRLC exist!!!
5129 #endif
5130 #endif
5131
5132 if (!retval)
5133 return;
5134
5135 print_sys_errmsg ("modify_run_on_last_close_flag", errno);
5136 error ("PIOCSRLC or PR_RLC modification failed");
5137 }
5138
5139 /*
5140
5141 LOCAL FUNCTION
5142
5143 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5144
5145 SYNOPSIS
5146
5147 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5148
5149 DESCRIPTION
5150
5151 This function function disables traps for the specified system call.
5152 errok is non-zero if errors should be ignored.
5153 */
5154
5155 static void
5156 procfs_clear_syscall_trap (pi, syscall_num, errok)
5157 struct procinfo *pi;
5158 int syscall_num;
5159 int errok;
5160 {
5161 sysset_t sysset;
5162 int goterr, i;
5163
5164 #ifndef UNIXWARE
5165 goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
5166
5167 if (goterr && !errok)
5168 {
5169 print_sys_errmsg (pi->pathname, errno);
5170 error ("PIOCGENTRY failed");
5171 }
5172
5173 if (!goterr)
5174 {
5175 prdelset (&sysset, syscall_num);
5176
5177 if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok)
5178 {
5179 print_sys_errmsg (pi->pathname, errno);
5180 error ("PIOCSENTRY failed");
5181 }
5182 }
5183
5184 goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0;
5185
5186 if (goterr && !errok)
5187 {
5188 procfs_clear_syscall_trap (pi, syscall_num, 1);
5189 print_sys_errmsg (pi->pathname, errno);
5190 error ("PIOCGEXIT failed");
5191 }
5192
5193 if (!goterr)
5194 {
5195 praddset (&sysset, syscall_num);
5196
5197 if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok)
5198 {
5199 procfs_clear_syscall_trap (pi, syscall_num, 1);
5200 print_sys_errmsg (pi->pathname, errno);
5201 error ("PIOCSEXIT failed");
5202 }
5203 }
5204 #endif
5205
5206 if (!pi->syscall_handlers)
5207 {
5208 if (!errok)
5209 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5210 return;
5211 }
5212
5213 /* Remove handler func from the handler list */
5214
5215 for (i = 0; i < pi->num_syscall_handlers; i++)
5216 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5217 {
5218 if (i + 1 != pi->num_syscall_handlers)
5219 { /* Not the last entry.
5220 Move subsequent entries fwd. */
5221 memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1],
5222 (pi->num_syscall_handlers - i - 1)
5223 * sizeof (struct procfs_syscall_handler));
5224 }
5225
5226 pi->syscall_handlers = xrealloc (pi->syscall_handlers,
5227 (pi->num_syscall_handlers - 1)
5228 * sizeof (struct procfs_syscall_handler));
5229 pi->num_syscall_handlers--;
5230 return;
5231 }
5232
5233 if (!errok)
5234 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5235 syscall_num);
5236 }
5237
5238 /*
5239
5240 LOCAL FUNCTION
5241
5242 procfs_set_syscall_trap -- arrange for a function to be called when the
5243 child executes the specified system call.
5244
5245 SYNOPSIS
5246
5247 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5248 syscall_func_t *function)
5249
5250 DESCRIPTION
5251
5252 This function sets up an entry and/or exit trap for the specified system
5253 call. When the child executes the specified system call, your function
5254 will be called with the call #, a flag that indicates entry or exit, and
5255 pointers to rtnval and statval (which are used by procfs_wait). The
5256 function should return non-zero if something interesting happened, zero
5257 otherwise.
5258 */
5259
5260 static void
5261 procfs_set_syscall_trap (pi, syscall_num, flags, func)
5262 struct procinfo *pi;
5263 int syscall_num;
5264 int flags;
5265 syscall_func_t *func;
5266 {
5267 sysset_t sysset;
5268
5269 #ifndef UNIXWARE
5270 if (flags & PROCFS_SYSCALL_ENTRY)
5271 {
5272 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
5273 {
5274 print_sys_errmsg (pi->pathname, errno);
5275 error ("PIOCGENTRY failed");
5276 }
5277
5278 praddset (&sysset, syscall_num);
5279
5280 if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0)
5281 {
5282 print_sys_errmsg (pi->pathname, errno);
5283 error ("PIOCSENTRY failed");
5284 }
5285 }
5286
5287 if (flags & PROCFS_SYSCALL_EXIT)
5288 {
5289 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0)
5290 {
5291 procfs_clear_syscall_trap (pi, syscall_num, 1);
5292 print_sys_errmsg (pi->pathname, errno);
5293 error ("PIOCGEXIT failed");
5294 }
5295
5296 praddset (&sysset, syscall_num);
5297
5298 if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0)
5299 {
5300 procfs_clear_syscall_trap (pi, syscall_num, 1);
5301 print_sys_errmsg (pi->pathname, errno);
5302 error ("PIOCSEXIT failed");
5303 }
5304 }
5305 #endif
5306
5307 if (!pi->syscall_handlers)
5308 {
5309 pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler));
5310 pi->syscall_handlers[0].syscall_num = syscall_num;
5311 pi->syscall_handlers[0].func = func;
5312 pi->num_syscall_handlers = 1;
5313 }
5314 else
5315 {
5316 int i;
5317
5318 for (i = 0; i < pi->num_syscall_handlers; i++)
5319 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5320 {
5321 pi->syscall_handlers[i].func = func;
5322 return;
5323 }
5324
5325 pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1)
5326 * sizeof (struct procfs_syscall_handler));
5327 pi->syscall_handlers[i].syscall_num = syscall_num;
5328 pi->syscall_handlers[i].func = func;
5329 pi->num_syscall_handlers++;
5330 }
5331 }
5332
5333 #ifdef SYS_lwp_create
5334
5335 /*
5336
5337 LOCAL FUNCTION
5338
5339 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5340
5341 SYNOPSIS
5342
5343 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5344
5345 DESCRIPTION
5346
5347 This routine is called both when an inferior process and it's new lwp
5348 are about to finish a _lwp_create() system call. This is the system
5349 call that Solaris uses to create a lightweight process. When the
5350 target process gets this event, we can look at sysarg[2] to find the
5351 new childs lwp ID, and create a procinfo struct from that. After that,
5352 we pretend that we got a SIGTRAP, and return non-zero to tell
5353 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5354 sees the new process and continues it.
5355
5356 When we see the child exiting from lwp_create, we just contine it,
5357 since everything was handled when the parent trapped.
5358
5359 NOTES
5360 In effect, we are only paying attention to the parent's completion of
5361 the lwp_create syscall. If we only paid attention to the child
5362 instead, then we wouldn't detect the creation of a suspended thread.
5363 */
5364
5365 static int
5366 procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5367 struct procinfo *pi;
5368 int syscall_num;
5369 int why;
5370 int *rtnvalp;
5371 int *statvalp;
5372 {
5373 int lwp_id;
5374 struct procinfo *childpi;
5375 struct proc_ctl pctl;
5376
5377 /* We've just detected the completion of an lwp_create system call. Now we
5378 need to setup a procinfo struct for this thread, and notify the thread
5379 system of the new arrival. */
5380
5381 /* If lwp_create failed, then nothing interesting happened. Continue the
5382 process and go back to sleep. */
5383
5384 #ifdef UNIXWARE
5385 /* Joel ... can you check this logic out please? JKJ */
5386 if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1)
5387 { /* _lwp_create failed */
5388 pctl.cmd = PCRUN;
5389 pctl.data = PRCFAULT;
5390
5391 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5392 perror_with_name (pi->pathname);
5393
5394 return 0;
5395 }
5396 #else /* UNIXWARE */
5397 if (PROCFS_GET_CARRY (pi->prstatus.pr_reg))
5398 { /* _lwp_create failed */
5399 pi->prrun.pr_flags &= PRSTEP;
5400 pi->prrun.pr_flags |= PRCFAULT;
5401
5402 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5403 perror_with_name (pi->pathname);
5404
5405 return 0;
5406 }
5407 #endif
5408
5409 /* At this point, the new thread is stopped at it's first instruction, and
5410 the parent is stopped at the exit from lwp_create. */
5411
5412 if (pi->new_child) /* Child? */
5413 { /* Yes, just continue it */
5414 #ifdef UNIXWARE
5415 pctl.cmd = PCRUN;
5416 pctl.data = PRCFAULT;
5417
5418 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5419 #else /* !UNIXWARE */
5420 pi->prrun.pr_flags &= PRSTEP;
5421 pi->prrun.pr_flags |= PRCFAULT;
5422
5423 if ((pi->prstatus.pr_flags & PR_ISTOP)
5424 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5425 #endif /* !UNIXWARE */
5426 perror_with_name (pi->pathname);
5427
5428 pi->new_child = 0; /* No longer new */
5429
5430 return 0;
5431 }
5432
5433 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5434 in the child and continue the parent. */
5435
5436 /* Third arg is pointer to new thread id. */
5437 #ifdef UNIXWARE
5438 lwp_id = read_memory_integer (pi->prstatus.pr_lwp.pr_sysarg[2], sizeof (int));
5439 #else
5440 lwp_id = read_memory_integer (pi->prstatus.pr_sysarg[2], sizeof (int));
5441 #endif
5442
5443 lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
5444
5445 childpi = create_procinfo (lwp_id);
5446
5447 /* The new process has actually inherited the lwp_create syscall trap from
5448 it's parent, but we still have to call this to register handlers for
5449 that child. */
5450
5451 procfs_set_inferior_syscall_traps (childpi);
5452 add_thread (lwp_id);
5453 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
5454
5455 /* Continue the parent */
5456 #ifdef UNIXWARE
5457 pctl.cmd = PCRUN;
5458 pctl.data = PRCFAULT;
5459
5460 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5461 #else
5462 pi->prrun.pr_flags &= PRSTEP;
5463 pi->prrun.pr_flags |= PRCFAULT;
5464 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5465 #endif
5466 perror_with_name (pi->pathname);
5467
5468 /* The new child may have been created in one of two states:
5469 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5470 If suspended, we flag it to be continued later, when it has an event. */
5471
5472 #ifdef UNIXWARE
5473 if (childpi->prstatus.pr_lwp.pr_why == PR_SUSPENDED)
5474 #else
5475 if (childpi->prstatus.pr_why == PR_SUSPENDED)
5476 #endif
5477 childpi->new_child = 1; /* Flag this as an unseen child process */
5478 else
5479 {
5480 /* Continue the child */
5481 #ifdef UNIXWARE
5482 pctl.cmd = PCRUN;
5483 pctl.data = PRCFAULT;
5484
5485 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5486 #else
5487 childpi->prrun.pr_flags &= PRSTEP;
5488 childpi->prrun.pr_flags |= PRCFAULT;
5489
5490 if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
5491 #endif
5492 perror_with_name (childpi->pathname);
5493 }
5494 return 0;
5495 }
5496 #endif /* SYS_lwp_create */
5497
5498 /* Fork an inferior process, and start debugging it with /proc. */
5499
5500 static void
5501 procfs_create_inferior (exec_file, allargs, env)
5502 char *exec_file;
5503 char *allargs;
5504 char **env;
5505 {
5506 char *shell_file = getenv ("SHELL");
5507 char *tryname;
5508 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
5509 {
5510
5511 /* We will be looking down the PATH to find shell_file. If we
5512 just do this the normal way (via execlp, which operates by
5513 attempting an exec for each element of the PATH until it
5514 finds one which succeeds), then there will be an exec for
5515 each failed attempt, each of which will cause a PR_SYSEXIT
5516 stop, and we won't know how to distinguish the PR_SYSEXIT's
5517 for these failed execs with the ones for successful execs
5518 (whether the exec has succeeded is stored at that time in the
5519 carry bit or some such architecture-specific and
5520 non-ABI-specified place).
5521
5522 So I can't think of anything better than to search the PATH
5523 now. This has several disadvantages: (1) There is a race
5524 condition; if we find a file now and it is deleted before we
5525 exec it, we lose, even if the deletion leaves a valid file
5526 further down in the PATH, (2) there is no way to know exactly
5527 what an executable (in the sense of "capable of being
5528 exec'd") file is. Using access() loses because it may lose
5529 if the caller is the superuser; failing to use it loses if
5530 there are ACLs or some such. */
5531
5532 char *p;
5533 char *p1;
5534 /* FIXME-maybe: might want "set path" command so user can change what
5535 path is used from within GDB. */
5536 char *path = getenv ("PATH");
5537 int len;
5538 struct stat statbuf;
5539
5540 if (path == NULL)
5541 path = "/bin:/usr/bin";
5542
5543 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
5544 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
5545 {
5546 p1 = strchr (p, ':');
5547 if (p1 != NULL)
5548 len = p1 - p;
5549 else
5550 len = strlen (p);
5551 strncpy (tryname, p, len);
5552 tryname[len] = '\0';
5553 strcat (tryname, "/");
5554 strcat (tryname, shell_file);
5555 if (access (tryname, X_OK) < 0)
5556 continue;
5557 if (stat (tryname, &statbuf) < 0)
5558 continue;
5559 if (!S_ISREG (statbuf.st_mode))
5560 /* We certainly need to reject directories. I'm not quite
5561 as sure about FIFOs, sockets, etc., but I kind of doubt
5562 that people want to exec() these things. */
5563 continue;
5564 break;
5565 }
5566 if (p == NULL)
5567 /* Not found. This must be an error rather than merely passing
5568 the file to execlp(), because execlp() would try all the
5569 exec()s, causing GDB to get confused. */
5570 error ("Can't find shell %s in PATH", shell_file);
5571
5572 shell_file = tryname;
5573 }
5574
5575 fork_inferior (exec_file, allargs, env,
5576 proc_set_exec_trap, procfs_init_inferior, NULL, shell_file);
5577
5578 /* We are at the first instruction we care about. */
5579 /* Pedal to the metal... */
5580
5581 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
5582 }
5583
5584 /* Clean up after the inferior dies. */
5585
5586 static void
5587 procfs_mourn_inferior ()
5588 {
5589 struct procinfo *pi;
5590 struct procinfo *next_pi;
5591
5592 for (pi = procinfo_list; pi; pi = next_pi)
5593 {
5594 next_pi = pi->next;
5595 unconditionally_kill_inferior (pi);
5596 }
5597
5598 unpush_target (&procfs_ops);
5599 generic_mourn_inferior ();
5600 }
5601
5602
5603 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5604 static int
5605 procfs_can_run ()
5606 {
5607 /* This variable is controlled by modules that sit atop procfs that may layer
5608 their own process structure atop that provided here. sol-thread.c does
5609 this because of the Solaris two-level thread model. */
5610
5611 return !procfs_suppress_run;
5612 }
5613 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5614 #ifndef UNIXWARE
5615 \f
5616 /* Insert a watchpoint */
5617 int
5618 procfs_set_watchpoint(pid, addr, len, rw)
5619 int pid;
5620 CORE_ADDR addr;
5621 int len;
5622 int rw;
5623 {
5624 struct procinfo *pi;
5625 prwatch_t wpt;
5626
5627 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5628 wpt.pr_vaddr = (caddr_t)addr;
5629 wpt.pr_size = len;
5630 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
5631 if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0)
5632 {
5633 if (errno == E2BIG)
5634 return -1;
5635 /* Currently it sometimes happens that the same watchpoint gets
5636 deleted twice - don't die in this case (FIXME please) */
5637 if (errno == ESRCH && len == 0)
5638 return 0;
5639 print_sys_errmsg (pi->pathname, errno);
5640 error ("PIOCSWATCH failed");
5641 }
5642 return 0;
5643 }
5644
5645 int
5646 procfs_stopped_by_watchpoint(pid)
5647 int pid;
5648 {
5649 struct procinfo *pi;
5650 short what;
5651 short why;
5652
5653 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5654 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
5655 {
5656 why = pi->prstatus.pr_why;
5657 what = pi->prstatus.pr_what;
5658 if (why == PR_FAULTED
5659 #if defined (FLTWATCH) && defined (FLTKWATCH)
5660 && (what == FLTWATCH || what == FLTKWATCH)
5661 #else
5662 #ifdef FLTWATCH
5663 && (what == FLTWATCH)
5664 #endif
5665 #ifdef FLTKWATCH
5666 && (what == FLTKWATCH)
5667 #endif
5668 #endif
5669 )
5670 return what;
5671 }
5672 return 0;
5673 }
5674 #endif /* !UNIXWARE */
5675 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5676
5677 /* Why is this necessary? Shouldn't dead threads just be removed from the
5678 thread database? */
5679
5680 static int
5681 procfs_thread_alive (pid)
5682 int pid;
5683 {
5684 struct procinfo *pi, *next_pi;
5685
5686 for (pi = procinfo_list; pi; pi = next_pi)
5687 {
5688 next_pi = pi->next;
5689 if (pi -> pid == pid)
5690 if (procfs_read_status (pi)) /* alive */
5691 return 1;
5692 else /* defunct (exited) */
5693 {
5694 close_proc_file (pi);
5695 return 0;
5696 }
5697 }
5698 return 0;
5699 }
5700
5701 int
5702 procfs_first_available ()
5703 {
5704 struct procinfo *pi;
5705
5706 for (pi = procinfo_list; pi; pi = pi->next)
5707 {
5708 if (procfs_read_status (pi))
5709 return pi->pid;
5710 }
5711 return -1;
5712 }
5713
5714 int
5715 procfs_get_pid_fd (pid)
5716 int pid;
5717 {
5718 struct procinfo *pi = find_procinfo (pid, 1);
5719
5720 if (pi == NULL)
5721 return -1;
5722
5723 return pi->ctl_fd;
5724 }
5725
5726 /* Send a SIGINT to the process group. This acts just like the user typed a
5727 ^C on the controlling terminal.
5728
5729 XXX - This may not be correct for all systems. Some may want to use
5730 killpg() instead of kill (-pgrp). */
5731
5732 static void
5733 procfs_stop ()
5734 {
5735 extern pid_t inferior_process_group;
5736
5737 kill (-inferior_process_group, SIGINT);
5738 }
5739 \f
5740 /* Convert a pid to printable form. */
5741
5742 #ifdef TIDGET
5743 char *
5744 procfs_pid_to_str (pid)
5745 int pid;
5746 {
5747 static char buf[100];
5748
5749 sprintf (buf, "Kernel thread %d", TIDGET (pid));
5750
5751 return buf;
5752 }
5753 #endif /* TIDGET */
5754 \f
5755 struct target_ops procfs_ops;
5756
5757 void
5758 _initialize_procfs ()
5759 {
5760 #ifdef HAVE_OPTIONAL_PROC_FS
5761 char procname[MAX_PROC_NAME_SIZE];
5762 int fd;
5763
5764 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5765 don't add procfs support if we cannot access the running
5766 GDB via /proc. */
5767 sprintf (procname, STATUS_PROC_NAME_FMT, getpid ());
5768 if ((fd = open (procname, O_RDONLY)) < 0)
5769 return;
5770 close (fd);
5771 #endif
5772 procfs_ops.to_shortname = "procfs";
5773 procfs_ops.to_longname = "Unix /proc child process";
5774 procfs_ops.to_doc = "Unix /proc child process (started by the \"run\" command).";
5775 procfs_ops.to_open = procfs_open;
5776 procfs_ops.to_close = 0;
5777 procfs_ops.to_attach = procfs_attach;
5778 procfs_ops.to_require_attach = procfs_attach;
5779 procfs_ops.to_detach = procfs_detach;
5780 procfs_ops.to_require_detach = procfs_detach;
5781 procfs_ops.to_resume = procfs_resume;
5782 procfs_ops.to_wait = procfs_wait;
5783 procfs_ops.to_fetch_registers = procfs_fetch_registers;
5784 procfs_ops.to_store_registers = procfs_store_registers;
5785 procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
5786 procfs_ops.to_xfer_memory = procfs_xfer_memory;
5787 procfs_ops.to_files_info = procfs_files_info;
5788 procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
5789 procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
5790 procfs_ops.to_terminal_init = terminal_init_inferior;
5791 procfs_ops.to_terminal_inferior = terminal_inferior;
5792 procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output;
5793 procfs_ops.to_terminal_ours = terminal_ours;
5794 procfs_ops.to_terminal_info = child_terminal_info;
5795 procfs_ops.to_kill = procfs_kill_inferior;
5796 procfs_ops.to_load = 0;
5797 procfs_ops.to_lookup_symbol = 0;
5798 procfs_ops.to_create_inferior = procfs_create_inferior;
5799 procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
5800 procfs_ops.to_can_run = procfs_can_run;
5801 procfs_ops.to_notice_signals = procfs_notice_signals;
5802 procfs_ops.to_thread_alive = procfs_thread_alive;
5803 procfs_ops.to_stop = procfs_stop;
5804 procfs_ops.to_stratum = process_stratum;
5805 procfs_ops.to_has_all_memory = 1;
5806 procfs_ops.to_has_memory = 1;
5807 procfs_ops.to_has_stack = 1;
5808 procfs_ops.to_has_registers = 1;
5809 procfs_ops.to_has_execution = 1;
5810 procfs_ops.to_has_thread_control = tc_none;
5811 procfs_ops.to_sections = 0;
5812 procfs_ops.to_sections_end = 0;
5813 procfs_ops.to_magic = OPS_MAGIC;
5814
5815 add_target (&procfs_ops);
5816
5817 add_info ("processes", info_proc,
5818 "Show process status information using /proc entry.\n\
5819 Specify process id or use current inferior by default.\n\
5820 Specify keywords for detailed information; default is summary.\n\
5821 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5822 `status', `syscalls', and `times'.\n\
5823 Unambiguous abbreviations may be used.");
5824
5825 init_syscall_table ();
5826 }
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