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