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Wed May 21 16:03:25 1997 Michael Snyder <msnyder@cleaver.cygnus.com>
[binutils-gdb.git] / gdb / procfs.c
1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992-96, 1997 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 /* the name of the proc status struct depends on the implementation */
58 #ifdef HAVE_PSTATUS_T
59 typedef pstatus_t gdb_prstatus_t;
60 #else
61 typedef prstatus_t gdb_prstatus_t;
62 #endif
63
64 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
65
66 /* proc name formats may vary depending on the proc implementation */
67 #ifdef HAVE_MULTIPLE_PROC_FDS
68 # ifndef CTL_PROC_NAME_FMT
69 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
70 # define AS_PROC_NAME_FMT "/proc/%d/as"
71 # define MAP_PROC_NAME_FMT "/proc/%d/map"
72 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
73 # endif
74 #else /* HAVE_MULTIPLE_PROC_FDS */
75 # ifndef CTL_PROC_NAME_FMT
76 # define CTL_PROC_NAME_FMT "/proc/%05d"
77 # define AS_PROC_NAME_FMT "/proc/%05d"
78 # define MAP_PROC_NAME_FMT "/proc/%05d"
79 # define STATUS_PROC_NAME_FMT "/proc/%05d"
80 # endif
81 #endif /* HAVE_MULTIPLE_PROC_FDS */
82
83 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
84
85 extern struct target_ops procfs_ops; /* Forward declaration */
86
87 int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
88 be a runnable target. Used by targets
89 that can sit atop procfs, such as solaris
90 thread support. */
91
92 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
93 CORE_ADDR kernel_u_addr;
94 #endif
95
96 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
97 #undef si_pid
98 #define si_pid _data._proc.pid
99 #undef si_uid
100 #define si_uid _data._proc._pdata._kill.uid
101 #endif /* BROKEN_SIGINFO_H */
102
103 /* Define structures for passing commands to /proc/pid/ctl file. Note that
104 while we create these for the PROCFS_USE_READ_WRITE world, we use them
105 and ignore the extra cmd int in other proc schemes.
106 */
107 /* generic ctl msg */
108 struct proc_ctl {
109 int cmd;
110 long data;
111 };
112
113 /* set general registers */
114 struct greg_ctl {
115 int cmd;
116 gregset_t gregset;
117 };
118
119 /* set fp registers */
120 struct fpreg_ctl {
121 int cmd;
122 fpregset_t fpregset;
123 };
124
125 /* set signals to be traced */
126 struct sig_ctl {
127 int cmd;
128 sigset_t sigset;
129 };
130
131 /* set faults to be traced */
132 struct flt_ctl {
133 int cmd;
134 fltset_t fltset;
135 };
136
137 /* set system calls to be traced */
138 struct sys_ctl {
139 int cmd;
140 sysset_t sysset;
141 };
142
143 /* set current signal to be traced */
144 struct sigi_ctl {
145 int cmd;
146 siginfo_t siginfo;
147 };
148
149 /* All access to the inferior, either one started by gdb or one that has
150 been attached to, is controlled by an instance of a procinfo structure,
151 defined below. Since gdb currently only handles one inferior at a time,
152 the procinfo structure for the inferior is statically allocated and
153 only one exists at any given time. There is a separate procinfo
154 structure for use by the "info proc" command, so that we can print
155 useful information about any random process without interfering with
156 the inferior's procinfo information. */
157
158 struct procinfo {
159 struct procinfo *next;
160 int pid; /* Process ID of inferior */
161 int ctl_fd; /* File descriptor for /proc ctl file */
162 int status_fd; /* File descriptor for /proc status file */
163 int as_fd; /* File descriptor for /proc as file */
164 int map_fd; /* File descriptor for /proc map file */
165 char *pathname; /* Pathname to /proc entry */
166 int had_event; /* poll/select says something happened */
167 int was_stopped; /* Nonzero if was stopped prior to attach */
168 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
169 #ifndef HAVE_NO_PRRUN_T
170 prrun_t prrun; /* Control state when it is run */
171 #endif
172 gdb_prstatus_t prstatus; /* Current process status info */
173 struct greg_ctl gregset; /* General register set */
174 struct fpreg_ctl fpregset; /* Floating point register set */
175 struct flt_ctl fltset; /* Current traced hardware fault set */
176 struct sig_ctl trace; /* Current traced signal set */
177 struct sys_ctl exitset; /* Current traced system call exit set */
178 struct sys_ctl entryset; /* Current traced system call entry set */
179 struct sig_ctl saved_sighold; /* Saved held signal set */
180 struct flt_ctl saved_fltset; /* Saved traced hardware fault set */
181 struct sig_ctl saved_trace; /* Saved traced signal set */
182 struct sys_ctl saved_exitset; /* Saved traced system call exit set */
183 struct sys_ctl saved_entryset;/* Saved traced system call entry set */
184 int num_syscall_handlers; /* Number of syscall trap handlers
185 currently installed */
186 /* Pointer to list of syscall trap handlers */
187 struct procfs_syscall_handler *syscall_handlers;
188 int new_child; /* Non-zero if it's a new thread */
189 };
190
191 /* List of inferior process information */
192 static struct procinfo *procinfo_list = NULL;
193 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
194
195 static int num_poll_list = 0; /* Number of entries in poll_list */
196
197 /* Much of the information used in the /proc interface, particularly for
198 printing status information, is kept as tables of structures of the
199 following form. These tables can be used to map numeric values to
200 their symbolic names and to a string that describes their specific use. */
201
202 struct trans {
203 int value; /* The numeric value */
204 char *name; /* The equivalent symbolic value */
205 char *desc; /* Short description of value */
206 };
207
208 /* Translate bits in the pr_flags member of the prstatus structure, into the
209 names and desc information. */
210
211 static struct trans pr_flag_table[] =
212 {
213 #if defined (PR_STOPPED)
214 { PR_STOPPED, "PR_STOPPED", "Process is stopped" },
215 #endif
216 #if defined (PR_ISTOP)
217 { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" },
218 #endif
219 #if defined (PR_DSTOP)
220 { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" },
221 #endif
222 #if defined (PR_ASLEEP)
223 { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" },
224 #endif
225 #if defined (PR_FORK)
226 { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" },
227 #endif
228 #if defined (PR_RLC)
229 { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" },
230 #endif
231 #if defined (PR_PTRACE)
232 { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" },
233 #endif
234 #if defined (PR_PCINVAL)
235 { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" },
236 #endif
237 #if defined (PR_ISSYS)
238 { PR_ISSYS, "PR_ISSYS", "Is a system process" },
239 #endif
240 #if defined (PR_STEP)
241 { PR_STEP, "PR_STEP", "Process has single step pending" },
242 #endif
243 #if defined (PR_KLC)
244 { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" },
245 #endif
246 #if defined (PR_ASYNC)
247 { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" },
248 #endif
249 #if defined (PR_PCOMPAT)
250 { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
251 #endif
252 #if defined (PR_MSACCT)
253 { PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled" },
254 #endif
255 #if defined (PR_BPTADJ)
256 { PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect" },
257 #endif
258 #if defined (PR_ASLWP)
259 { PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP" },
260 #endif
261 { 0, NULL, NULL }
262 };
263
264 /* Translate values in the pr_why field of the prstatus struct. */
265
266 static struct trans pr_why_table[] =
267 {
268 #if defined (PR_REQUESTED)
269 { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
270 #endif
271 #if defined (PR_SIGNALLED)
272 { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
273 #endif
274 #if defined (PR_SYSENTRY)
275 { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
276 #endif
277 #if defined (PR_SYSEXIT)
278 { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
279 #endif
280 #if defined (PR_JOBCONTROL)
281 { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
282 #endif
283 #if defined (PR_FAULTED)
284 { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
285 #endif
286 #if defined (PR_SUSPENDED)
287 { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
288 #endif
289 #if defined (PR_CHECKPOINT)
290 { PR_CHECKPOINT, "PR_CHECKPOINT", "(???)" },
291 #endif
292 { 0, NULL, NULL }
293 };
294
295 /* Hardware fault translation table. */
296
297 static struct trans faults_table[] =
298 {
299 #if defined (FLTILL)
300 { FLTILL, "FLTILL", "Illegal instruction" },
301 #endif
302 #if defined (FLTPRIV)
303 { FLTPRIV, "FLTPRIV", "Privileged instruction" },
304 #endif
305 #if defined (FLTBPT)
306 { FLTBPT, "FLTBPT", "Breakpoint trap" },
307 #endif
308 #if defined (FLTTRACE)
309 { FLTTRACE, "FLTTRACE", "Trace trap" },
310 #endif
311 #if defined (FLTACCESS)
312 { FLTACCESS, "FLTACCESS", "Memory access fault" },
313 #endif
314 #if defined (FLTBOUNDS)
315 { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" },
316 #endif
317 #if defined (FLTIOVF)
318 { FLTIOVF, "FLTIOVF", "Integer overflow" },
319 #endif
320 #if defined (FLTIZDIV)
321 { FLTIZDIV, "FLTIZDIV", "Integer zero divide" },
322 #endif
323 #if defined (FLTFPE)
324 { FLTFPE, "FLTFPE", "Floating-point exception" },
325 #endif
326 #if defined (FLTSTACK)
327 { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" },
328 #endif
329 #if defined (FLTPAGE)
330 { FLTPAGE, "FLTPAGE", "Recoverable page fault" },
331 #endif
332 { 0, NULL, NULL }
333 };
334
335 /* Translation table for signal generation information. See UNIX System
336 V Release 4 Programmer's Reference Manual, siginfo(5). */
337
338 static struct sigcode {
339 int signo;
340 int code;
341 char *codename;
342 char *desc;
343 } siginfo_table[] = {
344 #if defined (SIGILL) && defined (ILL_ILLOPC)
345 { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" },
346 #endif
347 #if defined (SIGILL) && defined (ILL_ILLOPN)
348 { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", },
349 #endif
350 #if defined (SIGILL) && defined (ILL_ILLADR)
351 { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" },
352 #endif
353 #if defined (SIGILL) && defined (ILL_ILLTRP)
354 { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" },
355 #endif
356 #if defined (SIGILL) && defined (ILL_PRVOPC)
357 { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" },
358 #endif
359 #if defined (SIGILL) && defined (ILL_PRVREG)
360 { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" },
361 #endif
362 #if defined (SIGILL) && defined (ILL_COPROC)
363 { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" },
364 #endif
365 #if defined (SIGILL) && defined (ILL_BADSTK)
366 { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" },
367 #endif
368 #if defined (SIGFPE) && defined (FPE_INTDIV)
369 { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" },
370 #endif
371 #if defined (SIGFPE) && defined (FPE_INTOVF)
372 { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" },
373 #endif
374 #if defined (SIGFPE) && defined (FPE_FLTDIV)
375 { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" },
376 #endif
377 #if defined (SIGFPE) && defined (FPE_FLTOVF)
378 { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" },
379 #endif
380 #if defined (SIGFPE) && defined (FPE_FLTUND)
381 { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" },
382 #endif
383 #if defined (SIGFPE) && defined (FPE_FLTRES)
384 { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" },
385 #endif
386 #if defined (SIGFPE) && defined (FPE_FLTINV)
387 { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" },
388 #endif
389 #if defined (SIGFPE) && defined (FPE_FLTSUB)
390 { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" },
391 #endif
392 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
393 { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" },
394 #endif
395 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
396 { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" },
397 #endif
398 #if defined (SIGBUS) && defined (BUS_ADRALN)
399 { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" },
400 #endif
401 #if defined (SIGBUS) && defined (BUS_ADRERR)
402 { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" },
403 #endif
404 #if defined (SIGBUS) && defined (BUS_OBJERR)
405 { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" },
406 #endif
407 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
408 { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" },
409 #endif
410 #if defined (SIGTRAP) && defined (TRAP_TRACE)
411 { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" },
412 #endif
413 #if defined (SIGCLD) && defined (CLD_EXITED)
414 { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" },
415 #endif
416 #if defined (SIGCLD) && defined (CLD_KILLED)
417 { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" },
418 #endif
419 #if defined (SIGCLD) && defined (CLD_DUMPED)
420 { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" },
421 #endif
422 #if defined (SIGCLD) && defined (CLD_TRAPPED)
423 { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" },
424 #endif
425 #if defined (SIGCLD) && defined (CLD_STOPPED)
426 { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" },
427 #endif
428 #if defined (SIGCLD) && defined (CLD_CONTINUED)
429 { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" },
430 #endif
431 #if defined (SIGPOLL) && defined (POLL_IN)
432 { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" },
433 #endif
434 #if defined (SIGPOLL) && defined (POLL_OUT)
435 { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" },
436 #endif
437 #if defined (SIGPOLL) && defined (POLL_MSG)
438 { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" },
439 #endif
440 #if defined (SIGPOLL) && defined (POLL_ERR)
441 { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" },
442 #endif
443 #if defined (SIGPOLL) && defined (POLL_PRI)
444 { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" },
445 #endif
446 #if defined (SIGPOLL) && defined (POLL_HUP)
447 { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" },
448 #endif
449 { 0, 0, NULL, NULL }
450 };
451
452 static char *syscall_table[MAX_SYSCALLS];
453
454 /* Prototypes for local functions */
455
456 static void procfs_stop PARAMS ((void));
457
458 static int procfs_thread_alive PARAMS ((int));
459
460 static int procfs_can_run PARAMS ((void));
461
462 static void procfs_mourn_inferior PARAMS ((void));
463
464 static void procfs_fetch_registers PARAMS ((int));
465
466 static int procfs_wait PARAMS ((int, struct target_waitstatus *));
467
468 static void procfs_open PARAMS ((char *, int));
469
470 static void procfs_files_info PARAMS ((struct target_ops *));
471
472 static void procfs_prepare_to_store PARAMS ((void));
473
474 static void procfs_detach PARAMS ((char *, int));
475
476 static void procfs_attach PARAMS ((char *, int));
477
478 static void proc_set_exec_trap PARAMS ((void));
479
480 static int procfs_init_inferior PARAMS ((int));
481
482 static struct procinfo *create_procinfo PARAMS ((int));
483
484 static void procfs_store_registers PARAMS ((int));
485
486 static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
487
488 static void procfs_kill_inferior PARAMS ((void));
489
490 static char *sigcodedesc PARAMS ((siginfo_t *));
491
492 static char *sigcodename PARAMS ((siginfo_t *));
493
494 static struct procinfo *wait_fd PARAMS ((void));
495
496 static void remove_fd PARAMS ((struct procinfo *));
497
498 static void add_fd PARAMS ((struct procinfo *));
499
500 static void set_proc_siginfo PARAMS ((struct procinfo *, int));
501
502 static void init_syscall_table PARAMS ((void));
503
504 static char *syscallname PARAMS ((int));
505
506 static char *signalname PARAMS ((int));
507
508 static char *errnoname PARAMS ((int));
509
510 static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
511
512 static int open_proc_file PARAMS ((int, struct procinfo *, int, int));
513
514 static void close_proc_file PARAMS ((struct procinfo *));
515
516 static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
517
518 static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN;
519
520 static void info_proc PARAMS ((char *, int));
521
522 static void info_proc_flags PARAMS ((struct procinfo *, int));
523
524 static void info_proc_stop PARAMS ((struct procinfo *, int));
525
526 static void info_proc_siginfo PARAMS ((struct procinfo *, int));
527
528 static void info_proc_syscalls PARAMS ((struct procinfo *, int));
529
530 static void info_proc_mappings PARAMS ((struct procinfo *, int));
531
532 static void info_proc_signals PARAMS ((struct procinfo *, int));
533
534 static void info_proc_faults PARAMS ((struct procinfo *, int));
535
536 static char *mappingflags PARAMS ((long));
537
538 static char *lookupname PARAMS ((struct trans *, unsigned int, char *));
539
540 static char *lookupdesc PARAMS ((struct trans *, unsigned int));
541
542 static int do_attach PARAMS ((int pid));
543
544 static void do_detach PARAMS ((int siggnal));
545
546 static void procfs_create_inferior PARAMS ((char *, char *, char **));
547
548 static void procfs_notice_signals PARAMS ((int pid));
549
550 static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *));
551
552 static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
553
554 static int procfs_write_pcwstop PARAMS ((struct procinfo *));
555 static int procfs_read_status PARAMS ((struct procinfo *));
556 static void procfs_write_pckill PARAMS ((struct procinfo *));
557
558 typedef int syscall_func_t PARAMS ((struct procinfo *pi, int syscall_num,
559 int why, int *rtnval, int *statval));
560
561 static void procfs_set_syscall_trap PARAMS ((struct procinfo *pi,
562 int syscall_num, int flags,
563 syscall_func_t *func));
564
565 static void procfs_clear_syscall_trap PARAMS ((struct procinfo *pi,
566 int syscall_num, int errok));
567
568 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
569 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
570
571 static syscall_func_t procfs_exit_handler;
572
573 static syscall_func_t procfs_exec_handler;
574
575 #ifdef SYS_sproc
576 static syscall_func_t procfs_sproc_handler;
577 static syscall_func_t procfs_fork_handler;
578 #endif
579
580 #ifdef SYS_lwp_create
581 static syscall_func_t procfs_lwp_creation_handler;
582 #endif
583
584 static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag));
585 static void modify_run_on_last_close_flag PARAMS ((int fd, int flag));
586
587 /* */
588
589 struct procfs_syscall_handler
590 {
591 int syscall_num; /* The number of the system call being handled */
592 /* The function to be called */
593 syscall_func_t *func;
594 };
595
596 static void procfs_resume PARAMS ((int pid, int step,
597 enum target_signal signo));
598
599 /* External function prototypes that can't be easily included in any
600 header file because the args are typedefs in system include files. */
601
602 extern void supply_gregset PARAMS ((gregset_t *));
603
604 extern void fill_gregset PARAMS ((gregset_t *, int));
605
606 #ifdef FP0_REGNUM
607 extern void supply_fpregset PARAMS ((fpregset_t *));
608
609 extern void fill_fpregset PARAMS ((fpregset_t *, int));
610 #endif
611
612 /*
613
614 LOCAL FUNCTION
615
616 find_procinfo -- convert a process id to a struct procinfo
617
618 SYNOPSIS
619
620 static struct procinfo * find_procinfo (pid_t pid, int okfail);
621
622 DESCRIPTION
623
624 Given a process id, look it up in the procinfo chain. Returns
625 a struct procinfo *. If can't find pid, then call error(),
626 unless okfail is set, in which case, return NULL;
627 */
628
629 static struct procinfo *
630 find_procinfo (pid, okfail)
631 pid_t pid;
632 int okfail;
633 {
634 struct procinfo *procinfo;
635
636 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
637 if (procinfo->pid == pid)
638 return procinfo;
639
640 if (okfail)
641 return NULL;
642
643 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
644 }
645
646 /*
647
648 LOCAL MACRO
649
650 current_procinfo -- convert inferior_pid to a struct procinfo
651
652 SYNOPSIS
653
654 static struct procinfo * current_procinfo;
655
656 DESCRIPTION
657
658 Looks up inferior_pid in the procinfo chain. Always returns a
659 struct procinfo *. If process can't be found, we error() out.
660 */
661
662 #define current_procinfo find_procinfo (inferior_pid, 0)
663
664 /*
665
666 LOCAL FUNCTION
667
668 add_fd -- Add the fd to the poll/select list
669
670 SYNOPSIS
671
672 static void add_fd (struct procinfo *);
673
674 DESCRIPTION
675
676 Add the fd of the supplied procinfo to the list of fds used for
677 poll/select operations.
678 */
679
680 static void
681 add_fd (pi)
682 struct procinfo *pi;
683 {
684 if (num_poll_list <= 0)
685 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
686 else
687 poll_list = (struct pollfd *) xrealloc (poll_list,
688 (num_poll_list + 1)
689 * sizeof (struct pollfd));
690 poll_list[num_poll_list].fd = pi->ctl_fd;
691 #ifdef UNIXWARE
692 poll_list[num_poll_list].events = POLLWRNORM;
693 #else
694 poll_list[num_poll_list].events = POLLPRI;
695 #endif
696
697 num_poll_list++;
698 }
699
700 /*
701
702 LOCAL FUNCTION
703
704 remove_fd -- Remove the fd from the poll/select list
705
706 SYNOPSIS
707
708 static void remove_fd (struct procinfo *);
709
710 DESCRIPTION
711
712 Remove the fd of the supplied procinfo from the list of fds used
713 for poll/select operations.
714 */
715
716 static void
717 remove_fd (pi)
718 struct procinfo *pi;
719 {
720 int i;
721
722 for (i = 0; i < num_poll_list; i++)
723 {
724 if (poll_list[i].fd == pi->ctl_fd)
725 {
726 if (i != num_poll_list - 1)
727 memcpy (poll_list + i, poll_list + i + 1,
728 (num_poll_list - i - 1) * sizeof (struct pollfd));
729
730 num_poll_list--;
731
732 if (num_poll_list == 0)
733 free (poll_list);
734 else
735 poll_list = (struct pollfd *) xrealloc (poll_list,
736 num_poll_list
737 * sizeof (struct pollfd));
738 return;
739 }
740 }
741 }
742
743 /*
744
745 LOCAL FUNCTION
746
747 procfs_read_status - get procfs fd status
748
749 SYNOPSIS
750
751 static int procfs_read_status (pi) struct procinfo *pi;
752
753 DESCRIPTION
754
755 Given a pointer to a procinfo struct, get the status of
756 the status_fd in the appropriate way. Returns 0 on failure,
757 1 on success.
758 */
759
760 static int
761 procfs_read_status (pi)
762 struct procinfo *pi;
763 {
764 #ifdef PROCFS_USE_READ_WRITE
765 if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) ||
766 (read (pi->status_fd, (char *) &pi->prstatus,
767 sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t)))
768 #else
769 if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0)
770 #endif
771 return 0;
772 else
773 return 1;
774 }
775
776 /*
777
778 LOCAL FUNCTION
779
780 procfs_write_pcwstop - send a PCWSTOP to procfs fd
781
782 SYNOPSIS
783
784 static int procfs_write_pcwstop (pi) struct procinfo *pi;
785
786 DESCRIPTION
787
788 Given a pointer to a procinfo struct, send a PCWSTOP to
789 the ctl_fd in the appropriate way. Returns 0 on failure,
790 1 on success.
791 */
792
793 static int
794 procfs_write_pcwstop (pi)
795 struct procinfo *pi;
796 {
797 #ifdef PROCFS_USE_READ_WRITE
798 long cmd = PCWSTOP;
799 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
800 #else
801 if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0)
802 #endif
803 return 0;
804 else
805 return 1;
806 }
807
808 /*
809
810 LOCAL FUNCTION
811
812 procfs_write_pckill - send a kill to procfs fd
813
814 SYNOPSIS
815
816 static void procfs_write_pckill (pi) struct procinfo *pi;
817
818 DESCRIPTION
819
820 Given a pointer to a procinfo struct, send a kill to
821 the ctl_fd in the appropriate way. Returns 0 on failure,
822 1 on success.
823 */
824
825 static void
826 procfs_write_pckill (pi)
827 struct procinfo *pi;
828 {
829 #ifdef PROCFS_USE_READ_WRITE
830 struct proc_ctl pctl;
831 pctl.cmd = PCKILL;
832 pctl.data = SIGKILL;
833 write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl));
834 #else
835 int signo = SIGKILL;
836 ioctl (pi->ctl_fd, PIOCKILL, &signo);
837 #endif
838 }
839
840 static struct procinfo *
841 wait_fd ()
842 {
843 struct procinfo *pi;
844 #ifndef LOSING_POLL
845 int num_fds;
846 int i;
847 #endif
848
849 set_sigint_trap (); /* Causes SIGINT to be passed on to the
850 attached process. */
851 set_sigio_trap ();
852
853 #ifndef LOSING_POLL
854 while (1)
855 {
856 num_fds = poll (poll_list, num_poll_list, -1);
857 if (num_fds > 0)
858 break;
859 if (num_fds < 0 && errno == EINTR)
860 continue;
861 print_sys_errmsg ("poll failed", errno);
862 error ("Poll failed, returned %d", num_fds);
863 }
864 #else /* LOSING_POLL */
865 pi = current_procinfo;
866
867 while (!procfs_write_pcwstop (pi))
868 {
869 if (errno == ENOENT)
870 {
871 /* Process exited. */
872 pi->prstatus.pr_flags = 0;
873 break;
874 }
875 else if (errno != EINTR)
876 {
877 print_sys_errmsg (pi->pathname, errno);
878 error ("procfs_write_pcwstop failed");
879 }
880 }
881 pi->had_event = 1;
882 #endif /* LOSING_POLL */
883
884 clear_sigint_trap ();
885 clear_sigio_trap ();
886
887 #ifndef LOSING_POLL
888
889 for (i = 0; i < num_poll_list && num_fds > 0; i++)
890 {
891 if (0 == (poll_list[i].revents &
892 (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL)))
893 continue;
894 for (pi = procinfo_list; pi; pi = pi->next)
895 {
896 if (poll_list[i].fd == pi->ctl_fd)
897 {
898 if (!procfs_read_status(pi))
899 {
900 /* The LWP has apparently terminated. */
901 if (info_verbose)
902 printf_filtered ("LWP %d doesn't respond.\n",
903 (pi->pid >> 16) & 0xffff);
904 /* could call close_proc_file here, but I'm afraid to... */
905 }
906
907 num_fds--;
908 pi->had_event = 1;
909 break;
910 }
911 }
912 if (!pi)
913 error ("wait_fd: Couldn't find procinfo for fd %d\n",
914 poll_list[i].fd);
915 }
916 #endif /* LOSING_POLL */
917
918 return pi;
919 }
920
921 /*
922
923 LOCAL FUNCTION
924
925 lookupdesc -- translate a value to a summary desc string
926
927 SYNOPSIS
928
929 static char *lookupdesc (struct trans *transp, unsigned int val);
930
931 DESCRIPTION
932
933 Given a pointer to a translation table and a value to be translated,
934 lookup the desc string and return it.
935 */
936
937 static char *
938 lookupdesc (transp, val)
939 struct trans *transp;
940 unsigned int val;
941 {
942 char *desc;
943
944 for (desc = NULL; transp -> name != NULL; transp++)
945 {
946 if (transp -> value == val)
947 {
948 desc = transp -> desc;
949 break;
950 }
951 }
952
953 /* Didn't find a translation for the specified value, set a default one. */
954
955 if (desc == NULL)
956 {
957 desc = "Unknown";
958 }
959 return (desc);
960 }
961
962 /*
963
964 LOCAL FUNCTION
965
966 lookupname -- translate a value to symbolic name
967
968 SYNOPSIS
969
970 static char *lookupname (struct trans *transp, unsigned int val,
971 char *prefix);
972
973 DESCRIPTION
974
975 Given a pointer to a translation table, a value to be translated,
976 and a default prefix to return if the value can't be translated,
977 match the value with one of the translation table entries and
978 return a pointer to the symbolic name.
979
980 If no match is found it just returns the value as a printable string,
981 with the given prefix. The previous such value, if any, is freed
982 at this time.
983 */
984
985 static char *
986 lookupname (transp, val, prefix)
987 struct trans *transp;
988 unsigned int val;
989 char *prefix;
990 {
991 static char *locbuf;
992 char *name;
993
994 for (name = NULL; transp -> name != NULL; transp++)
995 {
996 if (transp -> value == val)
997 {
998 name = transp -> name;
999 break;
1000 }
1001 }
1002
1003 /* Didn't find a translation for the specified value, build a default
1004 one using the specified prefix and return it. The lifetime of
1005 the value is only until the next one is needed. */
1006
1007 if (name == NULL)
1008 {
1009 if (locbuf != NULL)
1010 {
1011 free (locbuf);
1012 }
1013 locbuf = xmalloc (strlen (prefix) + 16);
1014 sprintf (locbuf, "%s %u", prefix, val);
1015 name = locbuf;
1016 }
1017 return (name);
1018 }
1019
1020 static char *
1021 sigcodename (sip)
1022 siginfo_t *sip;
1023 {
1024 struct sigcode *scp;
1025 char *name = NULL;
1026 static char locbuf[32];
1027
1028 for (scp = siginfo_table; scp -> codename != NULL; scp++)
1029 {
1030 if ((scp -> signo == sip -> si_signo) &&
1031 (scp -> code == sip -> si_code))
1032 {
1033 name = scp -> codename;
1034 break;
1035 }
1036 }
1037 if (name == NULL)
1038 {
1039 sprintf (locbuf, "sigcode %u", sip -> si_signo);
1040 name = locbuf;
1041 }
1042 return (name);
1043 }
1044
1045 static char *
1046 sigcodedesc (sip)
1047 siginfo_t *sip;
1048 {
1049 struct sigcode *scp;
1050 char *desc = NULL;
1051
1052 for (scp = siginfo_table; scp -> codename != NULL; scp++)
1053 {
1054 if ((scp -> signo == sip -> si_signo) &&
1055 (scp -> code == sip -> si_code))
1056 {
1057 desc = scp -> desc;
1058 break;
1059 }
1060 }
1061 if (desc == NULL)
1062 {
1063 desc = "Unrecognized signal or trap use";
1064 }
1065 return (desc);
1066 }
1067
1068 /*
1069
1070 LOCAL FUNCTION
1071
1072 syscallname - translate a system call number into a system call name
1073
1074 SYNOPSIS
1075
1076 char *syscallname (int syscallnum)
1077
1078 DESCRIPTION
1079
1080 Given a system call number, translate it into the printable name
1081 of a system call, or into "syscall <num>" if it is an unknown
1082 number.
1083 */
1084
1085 static char *
1086 syscallname (syscallnum)
1087 int syscallnum;
1088 {
1089 static char locbuf[32];
1090
1091 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS
1092 && syscall_table[syscallnum] != NULL)
1093 return syscall_table[syscallnum];
1094 else
1095 {
1096 sprintf (locbuf, "syscall %u", syscallnum);
1097 return locbuf;
1098 }
1099 }
1100
1101 /*
1102
1103 LOCAL FUNCTION
1104
1105 init_syscall_table - initialize syscall translation table
1106
1107 SYNOPSIS
1108
1109 void init_syscall_table (void)
1110
1111 DESCRIPTION
1112
1113 Dynamically initialize the translation table to convert system
1114 call numbers into printable system call names. Done once per
1115 gdb run, on initialization.
1116
1117 NOTES
1118
1119 This is awfully ugly, but preprocessor tricks to make it prettier
1120 tend to be nonportable.
1121 */
1122
1123 static void
1124 init_syscall_table ()
1125 {
1126 #if defined (SYS_exit)
1127 syscall_table[SYS_exit] = "exit";
1128 #endif
1129 #if defined (SYS_fork)
1130 syscall_table[SYS_fork] = "fork";
1131 #endif
1132 #if defined (SYS_read)
1133 syscall_table[SYS_read] = "read";
1134 #endif
1135 #if defined (SYS_write)
1136 syscall_table[SYS_write] = "write";
1137 #endif
1138 #if defined (SYS_open)
1139 syscall_table[SYS_open] = "open";
1140 #endif
1141 #if defined (SYS_close)
1142 syscall_table[SYS_close] = "close";
1143 #endif
1144 #if defined (SYS_wait)
1145 syscall_table[SYS_wait] = "wait";
1146 #endif
1147 #if defined (SYS_creat)
1148 syscall_table[SYS_creat] = "creat";
1149 #endif
1150 #if defined (SYS_link)
1151 syscall_table[SYS_link] = "link";
1152 #endif
1153 #if defined (SYS_unlink)
1154 syscall_table[SYS_unlink] = "unlink";
1155 #endif
1156 #if defined (SYS_exec)
1157 syscall_table[SYS_exec] = "exec";
1158 #endif
1159 #if defined (SYS_execv)
1160 syscall_table[SYS_execv] = "execv";
1161 #endif
1162 #if defined (SYS_execve)
1163 syscall_table[SYS_execve] = "execve";
1164 #endif
1165 #if defined (SYS_chdir)
1166 syscall_table[SYS_chdir] = "chdir";
1167 #endif
1168 #if defined (SYS_time)
1169 syscall_table[SYS_time] = "time";
1170 #endif
1171 #if defined (SYS_mknod)
1172 syscall_table[SYS_mknod] = "mknod";
1173 #endif
1174 #if defined (SYS_chmod)
1175 syscall_table[SYS_chmod] = "chmod";
1176 #endif
1177 #if defined (SYS_chown)
1178 syscall_table[SYS_chown] = "chown";
1179 #endif
1180 #if defined (SYS_brk)
1181 syscall_table[SYS_brk] = "brk";
1182 #endif
1183 #if defined (SYS_stat)
1184 syscall_table[SYS_stat] = "stat";
1185 #endif
1186 #if defined (SYS_lseek)
1187 syscall_table[SYS_lseek] = "lseek";
1188 #endif
1189 #if defined (SYS_getpid)
1190 syscall_table[SYS_getpid] = "getpid";
1191 #endif
1192 #if defined (SYS_mount)
1193 syscall_table[SYS_mount] = "mount";
1194 #endif
1195 #if defined (SYS_umount)
1196 syscall_table[SYS_umount] = "umount";
1197 #endif
1198 #if defined (SYS_setuid)
1199 syscall_table[SYS_setuid] = "setuid";
1200 #endif
1201 #if defined (SYS_getuid)
1202 syscall_table[SYS_getuid] = "getuid";
1203 #endif
1204 #if defined (SYS_stime)
1205 syscall_table[SYS_stime] = "stime";
1206 #endif
1207 #if defined (SYS_ptrace)
1208 syscall_table[SYS_ptrace] = "ptrace";
1209 #endif
1210 #if defined (SYS_alarm)
1211 syscall_table[SYS_alarm] = "alarm";
1212 #endif
1213 #if defined (SYS_fstat)
1214 syscall_table[SYS_fstat] = "fstat";
1215 #endif
1216 #if defined (SYS_pause)
1217 syscall_table[SYS_pause] = "pause";
1218 #endif
1219 #if defined (SYS_utime)
1220 syscall_table[SYS_utime] = "utime";
1221 #endif
1222 #if defined (SYS_stty)
1223 syscall_table[SYS_stty] = "stty";
1224 #endif
1225 #if defined (SYS_gtty)
1226 syscall_table[SYS_gtty] = "gtty";
1227 #endif
1228 #if defined (SYS_access)
1229 syscall_table[SYS_access] = "access";
1230 #endif
1231 #if defined (SYS_nice)
1232 syscall_table[SYS_nice] = "nice";
1233 #endif
1234 #if defined (SYS_statfs)
1235 syscall_table[SYS_statfs] = "statfs";
1236 #endif
1237 #if defined (SYS_sync)
1238 syscall_table[SYS_sync] = "sync";
1239 #endif
1240 #if defined (SYS_kill)
1241 syscall_table[SYS_kill] = "kill";
1242 #endif
1243 #if defined (SYS_fstatfs)
1244 syscall_table[SYS_fstatfs] = "fstatfs";
1245 #endif
1246 #if defined (SYS_pgrpsys)
1247 syscall_table[SYS_pgrpsys] = "pgrpsys";
1248 #endif
1249 #if defined (SYS_xenix)
1250 syscall_table[SYS_xenix] = "xenix";
1251 #endif
1252 #if defined (SYS_dup)
1253 syscall_table[SYS_dup] = "dup";
1254 #endif
1255 #if defined (SYS_pipe)
1256 syscall_table[SYS_pipe] = "pipe";
1257 #endif
1258 #if defined (SYS_times)
1259 syscall_table[SYS_times] = "times";
1260 #endif
1261 #if defined (SYS_profil)
1262 syscall_table[SYS_profil] = "profil";
1263 #endif
1264 #if defined (SYS_plock)
1265 syscall_table[SYS_plock] = "plock";
1266 #endif
1267 #if defined (SYS_setgid)
1268 syscall_table[SYS_setgid] = "setgid";
1269 #endif
1270 #if defined (SYS_getgid)
1271 syscall_table[SYS_getgid] = "getgid";
1272 #endif
1273 #if defined (SYS_signal)
1274 syscall_table[SYS_signal] = "signal";
1275 #endif
1276 #if defined (SYS_msgsys)
1277 syscall_table[SYS_msgsys] = "msgsys";
1278 #endif
1279 #if defined (SYS_sys3b)
1280 syscall_table[SYS_sys3b] = "sys3b";
1281 #endif
1282 #if defined (SYS_sysi86)
1283 syscall_table[SYS_sysi86] = "sysi86";
1284 #endif
1285 #if defined (SYS_acct)
1286 syscall_table[SYS_acct] = "acct";
1287 #endif
1288 #if defined (SYS_shmsys)
1289 syscall_table[SYS_shmsys] = "shmsys";
1290 #endif
1291 #if defined (SYS_semsys)
1292 syscall_table[SYS_semsys] = "semsys";
1293 #endif
1294 #if defined (SYS_ioctl)
1295 syscall_table[SYS_ioctl] = "ioctl";
1296 #endif
1297 #if defined (SYS_uadmin)
1298 syscall_table[SYS_uadmin] = "uadmin";
1299 #endif
1300 #if defined (SYS_utssys)
1301 syscall_table[SYS_utssys] = "utssys";
1302 #endif
1303 #if defined (SYS_fsync)
1304 syscall_table[SYS_fsync] = "fsync";
1305 #endif
1306 #if defined (SYS_umask)
1307 syscall_table[SYS_umask] = "umask";
1308 #endif
1309 #if defined (SYS_chroot)
1310 syscall_table[SYS_chroot] = "chroot";
1311 #endif
1312 #if defined (SYS_fcntl)
1313 syscall_table[SYS_fcntl] = "fcntl";
1314 #endif
1315 #if defined (SYS_ulimit)
1316 syscall_table[SYS_ulimit] = "ulimit";
1317 #endif
1318 #if defined (SYS_rfsys)
1319 syscall_table[SYS_rfsys] = "rfsys";
1320 #endif
1321 #if defined (SYS_rmdir)
1322 syscall_table[SYS_rmdir] = "rmdir";
1323 #endif
1324 #if defined (SYS_mkdir)
1325 syscall_table[SYS_mkdir] = "mkdir";
1326 #endif
1327 #if defined (SYS_getdents)
1328 syscall_table[SYS_getdents] = "getdents";
1329 #endif
1330 #if defined (SYS_sysfs)
1331 syscall_table[SYS_sysfs] = "sysfs";
1332 #endif
1333 #if defined (SYS_getmsg)
1334 syscall_table[SYS_getmsg] = "getmsg";
1335 #endif
1336 #if defined (SYS_putmsg)
1337 syscall_table[SYS_putmsg] = "putmsg";
1338 #endif
1339 #if defined (SYS_poll)
1340 syscall_table[SYS_poll] = "poll";
1341 #endif
1342 #if defined (SYS_lstat)
1343 syscall_table[SYS_lstat] = "lstat";
1344 #endif
1345 #if defined (SYS_symlink)
1346 syscall_table[SYS_symlink] = "symlink";
1347 #endif
1348 #if defined (SYS_readlink)
1349 syscall_table[SYS_readlink] = "readlink";
1350 #endif
1351 #if defined (SYS_setgroups)
1352 syscall_table[SYS_setgroups] = "setgroups";
1353 #endif
1354 #if defined (SYS_getgroups)
1355 syscall_table[SYS_getgroups] = "getgroups";
1356 #endif
1357 #if defined (SYS_fchmod)
1358 syscall_table[SYS_fchmod] = "fchmod";
1359 #endif
1360 #if defined (SYS_fchown)
1361 syscall_table[SYS_fchown] = "fchown";
1362 #endif
1363 #if defined (SYS_sigprocmask)
1364 syscall_table[SYS_sigprocmask] = "sigprocmask";
1365 #endif
1366 #if defined (SYS_sigsuspend)
1367 syscall_table[SYS_sigsuspend] = "sigsuspend";
1368 #endif
1369 #if defined (SYS_sigaltstack)
1370 syscall_table[SYS_sigaltstack] = "sigaltstack";
1371 #endif
1372 #if defined (SYS_sigaction)
1373 syscall_table[SYS_sigaction] = "sigaction";
1374 #endif
1375 #if defined (SYS_sigpending)
1376 syscall_table[SYS_sigpending] = "sigpending";
1377 #endif
1378 #if defined (SYS_context)
1379 syscall_table[SYS_context] = "context";
1380 #endif
1381 #if defined (SYS_evsys)
1382 syscall_table[SYS_evsys] = "evsys";
1383 #endif
1384 #if defined (SYS_evtrapret)
1385 syscall_table[SYS_evtrapret] = "evtrapret";
1386 #endif
1387 #if defined (SYS_statvfs)
1388 syscall_table[SYS_statvfs] = "statvfs";
1389 #endif
1390 #if defined (SYS_fstatvfs)
1391 syscall_table[SYS_fstatvfs] = "fstatvfs";
1392 #endif
1393 #if defined (SYS_nfssys)
1394 syscall_table[SYS_nfssys] = "nfssys";
1395 #endif
1396 #if defined (SYS_waitsys)
1397 syscall_table[SYS_waitsys] = "waitsys";
1398 #endif
1399 #if defined (SYS_sigsendsys)
1400 syscall_table[SYS_sigsendsys] = "sigsendsys";
1401 #endif
1402 #if defined (SYS_hrtsys)
1403 syscall_table[SYS_hrtsys] = "hrtsys";
1404 #endif
1405 #if defined (SYS_acancel)
1406 syscall_table[SYS_acancel] = "acancel";
1407 #endif
1408 #if defined (SYS_async)
1409 syscall_table[SYS_async] = "async";
1410 #endif
1411 #if defined (SYS_priocntlsys)
1412 syscall_table[SYS_priocntlsys] = "priocntlsys";
1413 #endif
1414 #if defined (SYS_pathconf)
1415 syscall_table[SYS_pathconf] = "pathconf";
1416 #endif
1417 #if defined (SYS_mincore)
1418 syscall_table[SYS_mincore] = "mincore";
1419 #endif
1420 #if defined (SYS_mmap)
1421 syscall_table[SYS_mmap] = "mmap";
1422 #endif
1423 #if defined (SYS_mprotect)
1424 syscall_table[SYS_mprotect] = "mprotect";
1425 #endif
1426 #if defined (SYS_munmap)
1427 syscall_table[SYS_munmap] = "munmap";
1428 #endif
1429 #if defined (SYS_fpathconf)
1430 syscall_table[SYS_fpathconf] = "fpathconf";
1431 #endif
1432 #if defined (SYS_vfork)
1433 syscall_table[SYS_vfork] = "vfork";
1434 #endif
1435 #if defined (SYS_fchdir)
1436 syscall_table[SYS_fchdir] = "fchdir";
1437 #endif
1438 #if defined (SYS_readv)
1439 syscall_table[SYS_readv] = "readv";
1440 #endif
1441 #if defined (SYS_writev)
1442 syscall_table[SYS_writev] = "writev";
1443 #endif
1444 #if defined (SYS_xstat)
1445 syscall_table[SYS_xstat] = "xstat";
1446 #endif
1447 #if defined (SYS_lxstat)
1448 syscall_table[SYS_lxstat] = "lxstat";
1449 #endif
1450 #if defined (SYS_fxstat)
1451 syscall_table[SYS_fxstat] = "fxstat";
1452 #endif
1453 #if defined (SYS_xmknod)
1454 syscall_table[SYS_xmknod] = "xmknod";
1455 #endif
1456 #if defined (SYS_clocal)
1457 syscall_table[SYS_clocal] = "clocal";
1458 #endif
1459 #if defined (SYS_setrlimit)
1460 syscall_table[SYS_setrlimit] = "setrlimit";
1461 #endif
1462 #if defined (SYS_getrlimit)
1463 syscall_table[SYS_getrlimit] = "getrlimit";
1464 #endif
1465 #if defined (SYS_lchown)
1466 syscall_table[SYS_lchown] = "lchown";
1467 #endif
1468 #if defined (SYS_memcntl)
1469 syscall_table[SYS_memcntl] = "memcntl";
1470 #endif
1471 #if defined (SYS_getpmsg)
1472 syscall_table[SYS_getpmsg] = "getpmsg";
1473 #endif
1474 #if defined (SYS_putpmsg)
1475 syscall_table[SYS_putpmsg] = "putpmsg";
1476 #endif
1477 #if defined (SYS_rename)
1478 syscall_table[SYS_rename] = "rename";
1479 #endif
1480 #if defined (SYS_uname)
1481 syscall_table[SYS_uname] = "uname";
1482 #endif
1483 #if defined (SYS_setegid)
1484 syscall_table[SYS_setegid] = "setegid";
1485 #endif
1486 #if defined (SYS_sysconfig)
1487 syscall_table[SYS_sysconfig] = "sysconfig";
1488 #endif
1489 #if defined (SYS_adjtime)
1490 syscall_table[SYS_adjtime] = "adjtime";
1491 #endif
1492 #if defined (SYS_systeminfo)
1493 syscall_table[SYS_systeminfo] = "systeminfo";
1494 #endif
1495 #if defined (SYS_seteuid)
1496 syscall_table[SYS_seteuid] = "seteuid";
1497 #endif
1498 #if defined (SYS_sproc)
1499 syscall_table[SYS_sproc] = "sproc";
1500 #endif
1501 #if defined (SYS_keyctl)
1502 syscall_table[SYS_keyctl] = "keyctl";
1503 #endif
1504 #if defined (SYS_secsys)
1505 syscall_table[SYS_secsys] = "secsys";
1506 #endif
1507 #if defined (SYS_filepriv)
1508 syscall_table[SYS_filepriv] = "filepriv";
1509 #endif
1510 #if defined (SYS_procpriv)
1511 syscall_table[SYS_procpriv] = "procpriv";
1512 #endif
1513 #if defined (SYS_devstat)
1514 syscall_table[SYS_devstat] = "devstat";
1515 #endif
1516 #if defined (SYS_aclipc)
1517 syscall_table[SYS_aclipc] = "aclipc";
1518 #endif
1519 #if defined (SYS_fdevstat)
1520 syscall_table[SYS_fdevstat] = "fdevstat";
1521 #endif
1522 #if defined (SYS_flvlfile)
1523 syscall_table[SYS_flvlfile] = "flvlfile";
1524 #endif
1525 #if defined (SYS_lvlfile)
1526 syscall_table[SYS_lvlfile] = "lvlfile";
1527 #endif
1528 #if defined (SYS_lvlequal)
1529 syscall_table[SYS_lvlequal] = "lvlequal";
1530 #endif
1531 #if defined (SYS_lvlproc)
1532 syscall_table[SYS_lvlproc] = "lvlproc";
1533 #endif
1534 #if defined (SYS_lvlipc)
1535 syscall_table[SYS_lvlipc] = "lvlipc";
1536 #endif
1537 #if defined (SYS_acl)
1538 syscall_table[SYS_acl] = "acl";
1539 #endif
1540 #if defined (SYS_auditevt)
1541 syscall_table[SYS_auditevt] = "auditevt";
1542 #endif
1543 #if defined (SYS_auditctl)
1544 syscall_table[SYS_auditctl] = "auditctl";
1545 #endif
1546 #if defined (SYS_auditdmp)
1547 syscall_table[SYS_auditdmp] = "auditdmp";
1548 #endif
1549 #if defined (SYS_auditlog)
1550 syscall_table[SYS_auditlog] = "auditlog";
1551 #endif
1552 #if defined (SYS_auditbuf)
1553 syscall_table[SYS_auditbuf] = "auditbuf";
1554 #endif
1555 #if defined (SYS_lvldom)
1556 syscall_table[SYS_lvldom] = "lvldom";
1557 #endif
1558 #if defined (SYS_lvlvfs)
1559 syscall_table[SYS_lvlvfs] = "lvlvfs";
1560 #endif
1561 #if defined (SYS_mkmld)
1562 syscall_table[SYS_mkmld] = "mkmld";
1563 #endif
1564 #if defined (SYS_mldmode)
1565 syscall_table[SYS_mldmode] = "mldmode";
1566 #endif
1567 #if defined (SYS_secadvise)
1568 syscall_table[SYS_secadvise] = "secadvise";
1569 #endif
1570 #if defined (SYS_online)
1571 syscall_table[SYS_online] = "online";
1572 #endif
1573 #if defined (SYS_setitimer)
1574 syscall_table[SYS_setitimer] = "setitimer";
1575 #endif
1576 #if defined (SYS_getitimer)
1577 syscall_table[SYS_getitimer] = "getitimer";
1578 #endif
1579 #if defined (SYS_gettimeofday)
1580 syscall_table[SYS_gettimeofday] = "gettimeofday";
1581 #endif
1582 #if defined (SYS_settimeofday)
1583 syscall_table[SYS_settimeofday] = "settimeofday";
1584 #endif
1585 #if defined (SYS_lwp_create)
1586 syscall_table[SYS_lwp_create] = "_lwp_create";
1587 #endif
1588 #if defined (SYS_lwp_exit)
1589 syscall_table[SYS_lwp_exit] = "_lwp_exit";
1590 #endif
1591 #if defined (SYS_lwp_wait)
1592 syscall_table[SYS_lwp_wait] = "_lwp_wait";
1593 #endif
1594 #if defined (SYS_lwp_self)
1595 syscall_table[SYS_lwp_self] = "_lwp_self";
1596 #endif
1597 #if defined (SYS_lwp_info)
1598 syscall_table[SYS_lwp_info] = "_lwp_info";
1599 #endif
1600 #if defined (SYS_lwp_private)
1601 syscall_table[SYS_lwp_private] = "_lwp_private";
1602 #endif
1603 #if defined (SYS_processor_bind)
1604 syscall_table[SYS_processor_bind] = "processor_bind";
1605 #endif
1606 #if defined (SYS_processor_exbind)
1607 syscall_table[SYS_processor_exbind] = "processor_exbind";
1608 #endif
1609 #if defined (SYS_prepblock)
1610 syscall_table[SYS_prepblock] = "prepblock";
1611 #endif
1612 #if defined (SYS_block)
1613 syscall_table[SYS_block] = "block";
1614 #endif
1615 #if defined (SYS_rdblock)
1616 syscall_table[SYS_rdblock] = "rdblock";
1617 #endif
1618 #if defined (SYS_unblock)
1619 syscall_table[SYS_unblock] = "unblock";
1620 #endif
1621 #if defined (SYS_cancelblock)
1622 syscall_table[SYS_cancelblock] = "cancelblock";
1623 #endif
1624 #if defined (SYS_pread)
1625 syscall_table[SYS_pread] = "pread";
1626 #endif
1627 #if defined (SYS_pwrite)
1628 syscall_table[SYS_pwrite] = "pwrite";
1629 #endif
1630 #if defined (SYS_truncate)
1631 syscall_table[SYS_truncate] = "truncate";
1632 #endif
1633 #if defined (SYS_ftruncate)
1634 syscall_table[SYS_ftruncate] = "ftruncate";
1635 #endif
1636 #if defined (SYS_lwp_kill)
1637 syscall_table[SYS_lwp_kill] = "_lwp_kill";
1638 #endif
1639 #if defined (SYS_sigwait)
1640 syscall_table[SYS_sigwait] = "sigwait";
1641 #endif
1642 #if defined (SYS_fork1)
1643 syscall_table[SYS_fork1] = "fork1";
1644 #endif
1645 #if defined (SYS_forkall)
1646 syscall_table[SYS_forkall] = "forkall";
1647 #endif
1648 #if defined (SYS_modload)
1649 syscall_table[SYS_modload] = "modload";
1650 #endif
1651 #if defined (SYS_moduload)
1652 syscall_table[SYS_moduload] = "moduload";
1653 #endif
1654 #if defined (SYS_modpath)
1655 syscall_table[SYS_modpath] = "modpath";
1656 #endif
1657 #if defined (SYS_modstat)
1658 syscall_table[SYS_modstat] = "modstat";
1659 #endif
1660 #if defined (SYS_modadm)
1661 syscall_table[SYS_modadm] = "modadm";
1662 #endif
1663 #if defined (SYS_getksym)
1664 syscall_table[SYS_getksym] = "getksym";
1665 #endif
1666 #if defined (SYS_lwp_suspend)
1667 syscall_table[SYS_lwp_suspend] = "_lwp_suspend";
1668 #endif
1669 #if defined (SYS_lwp_continue)
1670 syscall_table[SYS_lwp_continue] = "_lwp_continue";
1671 #endif
1672 #if defined (SYS_priocntllst)
1673 syscall_table[SYS_priocntllst] = "priocntllst";
1674 #endif
1675 #if defined (SYS_sleep)
1676 syscall_table[SYS_sleep] = "sleep";
1677 #endif
1678 #if defined (SYS_lwp_sema_wait)
1679 syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait";
1680 #endif
1681 #if defined (SYS_lwp_sema_post)
1682 syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post";
1683 #endif
1684 #if defined (SYS_lwp_sema_trywait)
1685 syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait";
1686 #endif
1687 }
1688
1689 /*
1690
1691 LOCAL FUNCTION
1692
1693 procfs_kill_inferior - kill any currently inferior
1694
1695 SYNOPSIS
1696
1697 void procfs_kill_inferior (void)
1698
1699 DESCRIPTION
1700
1701 Kill any current inferior.
1702
1703 NOTES
1704
1705 Kills even attached inferiors. Presumably the user has already
1706 been prompted that the inferior is an attached one rather than
1707 one started by gdb. (FIXME?)
1708
1709 */
1710
1711 static void
1712 procfs_kill_inferior ()
1713 {
1714 target_mourn_inferior ();
1715 }
1716
1717 /*
1718
1719 LOCAL FUNCTION
1720
1721 unconditionally_kill_inferior - terminate the inferior
1722
1723 SYNOPSIS
1724
1725 static void unconditionally_kill_inferior (struct procinfo *)
1726
1727 DESCRIPTION
1728
1729 Kill the specified inferior.
1730
1731 NOTE
1732
1733 A possibly useful enhancement would be to first try sending
1734 the inferior a terminate signal, politely asking it to commit
1735 suicide, before we murder it (we could call that
1736 politely_kill_inferior()).
1737
1738 */
1739
1740 static void
1741 unconditionally_kill_inferior (pi)
1742 struct procinfo *pi;
1743 {
1744 int ppid;
1745 struct proc_ctl pctl;
1746
1747 ppid = pi->prstatus.pr_ppid;
1748
1749 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
1750 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1751 before the PIOCKILL, otherwise it might generate a corrupted core
1752 file for the inferior. */
1753 ioctl (pi->ctl_fd, PIOCSSIG, NULL);
1754 #endif
1755 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1756 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1757 to kill the inferior, otherwise it might remain stopped with a
1758 pending SIGKILL.
1759 We do not check the result of the PIOCSSIG, the inferior might have
1760 died already. */
1761 {
1762 struct siginfo newsiginfo;
1763
1764 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
1765 newsiginfo.si_signo = SIGKILL;
1766 newsiginfo.si_code = 0;
1767 newsiginfo.si_errno = 0;
1768 newsiginfo.si_pid = getpid ();
1769 newsiginfo.si_uid = getuid ();
1770 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
1771 }
1772 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1773 procfs_write_pckill (pi);
1774 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1775
1776 #ifdef PR_DEAD
1777 /* With Alpha OSF/1 procfs, the process remains stopped after the inferior
1778 gets killed. After some time, the stop reason of the inferior changes
1779 to PR_DEAD and a PIOCRUN ioctl must be used to finally terminate the
1780 process. While the stop reason has not yet changed to PR_DEAD,
1781 the PIOCRUN will return with EAGAIN, and we keep trying.
1782 Any other errors are silently ignored as the inferior might have
1783 died already. */
1784 while (procfs_read_status (pi) && (pi->prstatus.pr_flags & PR_STOPPED))
1785 {
1786 pi->prrun.pr_flags = PRCFAULT;
1787 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) >= 0 || errno != EAGAIN)
1788 break;
1789 sleep (1);
1790 }
1791 #endif
1792
1793 close_proc_file (pi);
1794
1795 /* Only wait() for our direct children. Our grandchildren zombies are killed
1796 by the death of their parents. */
1797
1798 if (ppid == getpid())
1799 wait ((int *) 0);
1800 }
1801
1802 /*
1803
1804 LOCAL FUNCTION
1805
1806 procfs_xfer_memory -- copy data to or from inferior memory space
1807
1808 SYNOPSIS
1809
1810 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1811 int dowrite, struct target_ops target)
1812
1813 DESCRIPTION
1814
1815 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1816 from/to debugger memory starting at MYADDR. Copy from inferior
1817 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1818
1819 Returns the length copied, which is either the LEN argument or
1820 zero. This xfer function does not do partial moves, since procfs_ops
1821 doesn't allow memory operations to cross below us in the target stack
1822 anyway.
1823
1824 NOTES
1825
1826 The /proc interface makes this an almost trivial task.
1827 */
1828
1829 static int
1830 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1831 CORE_ADDR memaddr;
1832 char *myaddr;
1833 int len;
1834 int dowrite;
1835 struct target_ops *target; /* ignored */
1836 {
1837 int nbytes = 0;
1838 struct procinfo *pi;
1839
1840 pi = current_procinfo;
1841
1842 if (lseek(pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
1843 {
1844 if (dowrite)
1845 {
1846 nbytes = write (pi->as_fd, myaddr, len);
1847 }
1848 else
1849 {
1850 nbytes = read (pi->as_fd, myaddr, len);
1851 }
1852 if (nbytes < 0)
1853 {
1854 nbytes = 0;
1855 }
1856 }
1857 return (nbytes);
1858 }
1859
1860 /*
1861
1862 LOCAL FUNCTION
1863
1864 procfs_store_registers -- copy register values back to inferior
1865
1866 SYNOPSIS
1867
1868 void procfs_store_registers (int regno)
1869
1870 DESCRIPTION
1871
1872 Store our current register values back into the inferior. If
1873 REGNO is -1 then store all the register, otherwise store just
1874 the value specified by REGNO.
1875
1876 NOTES
1877
1878 If we are storing only a single register, we first have to get all
1879 the current values from the process, overwrite the desired register
1880 in the gregset with the one we want from gdb's registers, and then
1881 send the whole set back to the process. For writing all the
1882 registers, all we have to do is generate the gregset and send it to
1883 the process.
1884
1885 Also note that the process has to be stopped on an event of interest
1886 for this to work, which basically means that it has to have been
1887 run under the control of one of the other /proc ioctl calls and not
1888 ptrace. Since we don't use ptrace anyway, we don't worry about this
1889 fine point, but it is worth noting for future reference.
1890
1891 Gdb is confused about what this function is supposed to return.
1892 Some versions return a value, others return nothing. Some are
1893 declared to return a value and actually return nothing. Gdb ignores
1894 anything returned. (FIXME)
1895
1896 */
1897
1898 static void
1899 procfs_store_registers (regno)
1900 int regno;
1901 {
1902 struct procinfo *pi;
1903 #ifdef PROCFS_USE_READ_WRITE
1904 struct greg_ctl greg;
1905 struct fpreg_ctl fpreg;
1906 #endif
1907
1908 pi = current_procinfo;
1909
1910 #ifdef PROCFS_USE_READ_WRITE
1911 if (regno != -1)
1912 {
1913 procfs_read_status (pi);
1914 memcpy ((char *) &greg.gregset,
1915 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs,
1916 sizeof (gregset_t));
1917 }
1918 fill_gregset (&greg.gregset, regno);
1919 greg.cmd = PCSREG;
1920 write (pi->ctl_fd, &greg, sizeof (greg));
1921 #else /* PROCFS_USE_READ_WRITE */
1922 if (regno != -1)
1923 {
1924 ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset);
1925 }
1926 fill_gregset (&pi->gregset.gregset, regno);
1927 ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset);
1928 #endif /* PROCFS_USE_READ_WRITE */
1929
1930 #if defined (FP0_REGNUM)
1931
1932 /* Now repeat everything using the floating point register set, if the
1933 target has floating point hardware. Since we ignore the returned value,
1934 we'll never know whether it worked or not anyway. */
1935
1936 #ifdef PROCFS_USE_READ_WRITE
1937 if (regno != -1)
1938 {
1939 procfs_read_status (pi);
1940 memcpy ((char *) &fpreg.fpregset,
1941 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs,
1942 sizeof (fpregset_t));
1943 }
1944 fill_fpregset (&fpreg.fpregset, regno);
1945 fpreg.cmd = PCSFPREG;
1946 write (pi->ctl_fd, &fpreg, sizeof (fpreg));
1947 #else /* PROCFS_USE_READ_WRITE */
1948 if (regno != -1)
1949 {
1950 ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset);
1951 }
1952 fill_fpregset (&pi->fpregset.fpregset, regno);
1953 ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset);
1954 #endif /* PROCFS_USE_READ_WRITE */
1955
1956 #endif /* FP0_REGNUM */
1957
1958 }
1959
1960 /*
1961
1962 LOCAL FUNCTION
1963
1964 init_procinfo - setup a procinfo struct and connect it to a process
1965
1966 SYNOPSIS
1967
1968 struct procinfo * init_procinfo (int pid)
1969
1970 DESCRIPTION
1971
1972 Allocate a procinfo structure, open the /proc file and then set up the
1973 set of signals and faults that are to be traced. Returns a pointer to
1974 the new procinfo structure.
1975
1976 NOTES
1977
1978 If proc_init_failed ever gets called, control returns to the command
1979 processing loop via the standard error handling code.
1980
1981 */
1982
1983 static struct procinfo *
1984 init_procinfo (pid, kill)
1985 int pid;
1986 int kill;
1987 {
1988 struct procinfo *pi = (struct procinfo *)
1989 xmalloc (sizeof (struct procinfo));
1990
1991 memset ((char *) pi, 0, sizeof (*pi));
1992 if (!open_proc_file (pid, pi, O_RDWR, 1))
1993 proc_init_failed (pi, "can't open process file", kill);
1994
1995 /* open_proc_file may modify pid. */
1996
1997 pid = pi -> pid;
1998
1999 /* Add new process to process info list */
2000
2001 pi->next = procinfo_list;
2002 procinfo_list = pi;
2003
2004 add_fd (pi); /* Add to list for poll/select */
2005
2006 /* Remember some things about the inferior that we will, or might, change
2007 so that we can restore them when we detach. */
2008 #ifdef UNIXWARE
2009 memcpy ((char *) &pi->saved_trace.sigset,
2010 (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
2011 memcpy ((char *) &pi->saved_fltset.fltset,
2012 (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
2013 memcpy ((char *) &pi->saved_entryset.sysset,
2014 (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
2015 memcpy ((char *) &pi->saved_exitset.sysset,
2016 (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
2017
2018 /* Set up trace and fault sets, as gdb expects them. */
2019
2020 prfillset (&sctl.sigset);
2021 notice_signals (pi, &sctl);
2022 prfillset (&fctl.fltset);
2023 prdelset (&fctl.fltset, FLTPAGE);
2024
2025 #else /* ! UNIXWARE */
2026 ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
2027 ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
2028 ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
2029 ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
2030 ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
2031
2032 /* Set up trace and fault sets, as gdb expects them. */
2033
2034 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
2035 prfillset (&pi->prrun.pr_trace);
2036 procfs_notice_signals (pid);
2037 prfillset (&pi->prrun.pr_fault);
2038 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2039 #ifdef PROCFS_DONT_TRACE_FAULTS
2040 premptyset (&pi->prrun.pr_fault);
2041 #endif
2042 #endif /* UNIXWARE */
2043
2044 if (!procfs_read_status (pi))
2045 proc_init_failed (pi, "procfs_read_status failed", kill);
2046
2047 return pi;
2048 }
2049
2050 /*
2051
2052 LOCAL FUNCTION
2053
2054 create_procinfo - initialize access to a /proc entry
2055
2056 SYNOPSIS
2057
2058 struct procinfo * create_procinfo (int pid)
2059
2060 DESCRIPTION
2061
2062 Allocate a procinfo structure, open the /proc file and then set up the
2063 set of signals and faults that are to be traced. Returns a pointer to
2064 the new procinfo structure.
2065
2066 NOTES
2067
2068 If proc_init_failed ever gets called, control returns to the command
2069 processing loop via the standard error handling code.
2070
2071 */
2072
2073 static struct procinfo *
2074 create_procinfo (pid)
2075 int pid;
2076 {
2077 struct procinfo *pi;
2078 struct sig_ctl sctl;
2079 struct flt_ctl fctl;
2080
2081 pi = find_procinfo (pid, 1);
2082 if (pi != NULL)
2083 return pi; /* All done! It already exists */
2084
2085 pi = init_procinfo (pid, 1);
2086
2087 #ifndef UNIXWARE
2088 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2089 already stopped, even if they all have PR_ASYNC set. */
2090 if (!(pi->prstatus.pr_flags & PR_STOPPED))
2091 #endif
2092 if (!procfs_write_pcwstop (pi))
2093 proc_init_failed (pi, "procfs_write_pcwstop failed", 1);
2094
2095 #ifdef PROCFS_USE_READ_WRITE
2096 fctl.cmd = PCSFAULT;
2097 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
2098 proc_init_failed (pi, "PCSFAULT failed", 1);
2099 #else
2100 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
2101 proc_init_failed (pi, "PIOCSFAULT failed", 1);
2102 #endif
2103
2104 return pi;
2105 }
2106
2107 /*
2108
2109 LOCAL FUNCTION
2110
2111 procfs_exit_handler - handle entry into the _exit syscall
2112
2113 SYNOPSIS
2114
2115 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2116
2117 DESCRIPTION
2118
2119 This routine is called when an inferior process enters the _exit()
2120 system call. It continues the process, and then collects the exit
2121 status and pid which are returned in *statvalp and *rtnvalp. After
2122 that it returns non-zero to indicate that procfs_wait should wake up.
2123
2124 NOTES
2125 There is probably a better way to do this.
2126
2127 */
2128
2129 static int
2130 procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2131 struct procinfo *pi;
2132 int syscall_num;
2133 int why;
2134 int *rtnvalp;
2135 int *statvalp;
2136 {
2137 struct procinfo *temp_pi, *next_pi;
2138
2139 pi->prrun.pr_flags = PRCFAULT;
2140
2141 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2142 perror_with_name (pi->pathname);
2143
2144 if (attach_flag)
2145 {
2146 /* Claim it exited (don't call wait). */
2147 if (info_verbose)
2148 printf_filtered ("(attached process has exited)\n");
2149 *statvalp = 0;
2150 *rtnvalp = inferior_pid;
2151 }
2152 else
2153 {
2154 *rtnvalp = wait (statvalp);
2155 if (*rtnvalp >= 0)
2156 *rtnvalp = pi->pid;
2157 }
2158
2159 /* Close ALL open proc file handles,
2160 except the one that called SYS_exit. */
2161 for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi)
2162 {
2163 next_pi = temp_pi->next;
2164 if (temp_pi == pi)
2165 continue; /* Handled below */
2166 close_proc_file (temp_pi);
2167 }
2168 return 1;
2169 }
2170
2171 /*
2172
2173 LOCAL FUNCTION
2174
2175 procfs_exec_handler - handle exit from the exec family of syscalls
2176
2177 SYNOPSIS
2178
2179 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2180
2181 DESCRIPTION
2182
2183 This routine is called when an inferior process is about to finish any
2184 of the exec() family of system calls. It pretends that we got a
2185 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2186 to tell procfs_wait to wake up.
2187
2188 NOTES
2189 This need for compatibility with ptrace is questionable. In the
2190 future, it shouldn't be necessary.
2191
2192 */
2193
2194 static int
2195 procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2196 struct procinfo *pi;
2197 int syscall_num;
2198 int why;
2199 int *rtnvalp;
2200 int *statvalp;
2201 {
2202 *statvalp = (SIGTRAP << 8) | 0177;
2203
2204 return 1;
2205 }
2206
2207 #if defined(SYS_sproc) && !defined(UNIXWARE)
2208 /* IRIX lwp creation system call */
2209
2210 /*
2211
2212 LOCAL FUNCTION
2213
2214 procfs_sproc_handler - handle exit from the sproc syscall
2215
2216 SYNOPSIS
2217
2218 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2219
2220 DESCRIPTION
2221
2222 This routine is called when an inferior process is about to finish an
2223 sproc() system call. This is the system call that IRIX uses to create
2224 a lightweight process. When the target process gets this event, we can
2225 look at rval1 to find the new child processes ID, and create a new
2226 procinfo struct from that.
2227
2228 After that, it pretends that we got a SIGTRAP, and returns non-zero
2229 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2230 woken up, sees the new process and continues it.
2231
2232 NOTES
2233 We actually never see the child exiting from sproc because we will
2234 shortly stop the child with PIOCSTOP, which is then registered as the
2235 event of interest.
2236 */
2237
2238 static int
2239 procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2240 struct procinfo *pi;
2241 int syscall_num;
2242 int why;
2243 int *rtnvalp;
2244 int *statvalp;
2245 {
2246 /* We've just detected the completion of an sproc system call. Now we need to
2247 setup a procinfo struct for this thread, and notify the thread system of the
2248 new arrival. */
2249
2250 /* If sproc failed, then nothing interesting happened. Continue the process
2251 and go back to sleep. */
2252
2253 if (pi->prstatus.pr_errno != 0)
2254 {
2255 pi->prrun.pr_flags &= PRSTEP;
2256 pi->prrun.pr_flags |= PRCFAULT;
2257
2258 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2259 perror_with_name (pi->pathname);
2260
2261 return 0;
2262 }
2263
2264 /* At this point, the new thread is stopped at it's first instruction, and
2265 the parent is stopped at the exit from sproc. */
2266
2267 /* Notify the caller of the arrival of a new thread. */
2268 create_procinfo (pi->prstatus.pr_rval1);
2269
2270 *rtnvalp = pi->prstatus.pr_rval1;
2271 *statvalp = (SIGTRAP << 8) | 0177;
2272
2273 return 1;
2274 }
2275
2276 /*
2277
2278 LOCAL FUNCTION
2279
2280 procfs_fork_handler - handle exit from the fork syscall
2281
2282 SYNOPSIS
2283
2284 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2285
2286 DESCRIPTION
2287
2288 This routine is called when an inferior process is about to finish a
2289 fork() system call. We will open up the new process, and then close
2290 it, which releases it from the clutches of the debugger.
2291
2292 After that, we continue the target process as though nothing had
2293 happened.
2294
2295 NOTES
2296 This is necessary for IRIX because we have to set PR_FORK in order
2297 to catch the creation of lwps (via sproc()). When an actual fork
2298 occurs, it becomes necessary to reset the forks debugger flags and
2299 continue it because we can't hack multiple processes yet.
2300 */
2301
2302 static int
2303 procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2304 struct procinfo *pi;
2305 int syscall_num;
2306 int why;
2307 int *rtnvalp;
2308 int *statvalp;
2309 {
2310 struct procinfo *pitemp;
2311
2312 /* At this point, we've detected the completion of a fork (or vfork) call in
2313 our child. The grandchild is also stopped because we set inherit-on-fork
2314 earlier. (Note that nobody has the grandchilds' /proc file open at this
2315 point.) We will release the grandchild from the debugger by opening it's
2316 /proc file and then closing it. Since run-on-last-close is set, the
2317 grandchild continues on its' merry way. */
2318
2319
2320 pitemp = create_procinfo (pi->prstatus.pr_rval1);
2321 if (pitemp)
2322 close_proc_file (pitemp);
2323
2324 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2325 perror_with_name (pi->pathname);
2326
2327 return 0;
2328 }
2329 #endif /* SYS_sproc && !UNIXWARE */
2330
2331 /*
2332
2333 LOCAL FUNCTION
2334
2335 procfs_set_inferior_syscall_traps - setup the syscall traps
2336
2337 SYNOPSIS
2338
2339 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2340
2341 DESCRIPTION
2342
2343 Called for each "procinfo" (process, thread, or LWP) in the
2344 inferior, to register for notification of and handlers for
2345 syscall traps in the inferior.
2346
2347 */
2348
2349 static void
2350 procfs_set_inferior_syscall_traps (pip)
2351 struct procinfo *pip;
2352 {
2353 #ifndef PIOCSSPCACT
2354 procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
2355 procfs_exit_handler);
2356
2357 #ifdef SYS_exec
2358 procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
2359 procfs_exec_handler);
2360 #endif
2361 #ifdef SYS_execv
2362 procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT,
2363 procfs_exec_handler);
2364 #endif
2365 #ifdef SYS_execve
2366 procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
2367 procfs_exec_handler);
2368 #endif
2369 #endif /* PIOCSSPCACT */
2370
2371 /* Setup traps on exit from sproc() */
2372
2373 #ifdef SYS_sproc
2374 procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT,
2375 procfs_sproc_handler);
2376 procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT,
2377 procfs_fork_handler);
2378 #ifdef SYS_vfork
2379 procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT,
2380 procfs_fork_handler);
2381 #endif
2382 /* Turn on inherit-on-fork flag so that all children of the target process
2383 start with tracing flags set. This allows us to trap lwp creation. Note
2384 that we also have to trap on fork and vfork in order to disable all tracing
2385 in the targets child processes. */
2386
2387 modify_inherit_on_fork_flag (pip->ctl_fd, 1);
2388 #endif
2389
2390 #ifdef SYS_lwp_create
2391 procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
2392 procfs_lwp_creation_handler);
2393 #endif
2394 }
2395
2396 /*
2397
2398 LOCAL FUNCTION
2399
2400 procfs_init_inferior - initialize target vector and access to a
2401 /proc entry
2402
2403 SYNOPSIS
2404
2405 int procfs_init_inferior (int pid)
2406
2407 DESCRIPTION
2408
2409 When gdb starts an inferior, this function is called in the parent
2410 process immediately after the fork. It waits for the child to stop
2411 on the return from the exec system call (the child itself takes care
2412 of ensuring that this is set up), then sets up the set of signals
2413 and faults that are to be traced. Returns the pid, which may have had
2414 the thread-id added to it.
2415
2416 NOTES
2417
2418 If proc_init_failed ever gets called, control returns to the command
2419 processing loop via the standard error handling code.
2420
2421 */
2422
2423 static int
2424 procfs_init_inferior (pid)
2425 int pid;
2426 {
2427 struct procinfo *pip;
2428
2429 push_target (&procfs_ops);
2430
2431 pip = create_procinfo (pid);
2432
2433 procfs_set_inferior_syscall_traps (pip);
2434
2435 /* create_procinfo may change the pid, so we have to update inferior_pid
2436 here before calling other gdb routines that need the right pid. */
2437
2438 pid = pip -> pid;
2439 inferior_pid = pid;
2440
2441 add_thread (pip -> pid); /* Setup initial thread */
2442
2443 #ifdef START_INFERIOR_TRAPS_EXPECTED
2444 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
2445 #else
2446 /* One trap to exec the shell, one to exec the program being debugged. */
2447 startup_inferior (2);
2448 #endif
2449
2450 return pid;
2451 }
2452
2453 /*
2454
2455 GLOBAL FUNCTION
2456
2457 procfs_notice_signals
2458
2459 SYNOPSIS
2460
2461 static void procfs_notice_signals (int pid);
2462
2463 DESCRIPTION
2464
2465 When the user changes the state of gdb's signal handling via the
2466 "handle" command, this function gets called to see if any change
2467 in the /proc interface is required. It is also called internally
2468 by other /proc interface functions to initialize the state of
2469 the traced signal set.
2470
2471 One thing it does is that signals for which the state is "nostop",
2472 "noprint", and "pass", have their trace bits reset in the pr_trace
2473 field, so that they are no longer traced. This allows them to be
2474 delivered directly to the inferior without the debugger ever being
2475 involved.
2476 */
2477
2478 static void
2479 procfs_notice_signals (pid)
2480 int pid;
2481 {
2482 struct procinfo *pi;
2483 struct sig_ctl sctl;
2484
2485 pi = find_procinfo (pid, 0);
2486
2487 #ifdef UNIXWARE
2488 premptyset (&sctl.sigset);
2489 #else
2490 sctl.sigset = pi->prrun.pr_trace;
2491 #endif
2492
2493 notice_signals (pi, &sctl);
2494
2495 #ifndef UNIXWARE
2496 pi->prrun.pr_trace = sctl.sigset;
2497 #endif
2498 }
2499
2500 static void
2501 notice_signals (pi, sctl)
2502 struct procinfo *pi;
2503 struct sig_ctl *sctl;
2504 {
2505 int signo;
2506
2507 for (signo = 0; signo < NSIG; signo++)
2508 {
2509 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
2510 signal_print_state (target_signal_from_host (signo)) == 0 &&
2511 signal_pass_state (target_signal_from_host (signo)) == 1)
2512 {
2513 prdelset (&sctl->sigset, signo);
2514 }
2515 else
2516 {
2517 praddset (&sctl->sigset, signo);
2518 }
2519 }
2520 #ifdef PROCFS_USE_READ_WRITE
2521 sctl->cmd = PCSTRACE;
2522 if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0)
2523 #else
2524 if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset))
2525 #endif
2526 {
2527 print_sys_errmsg ("PIOCSTRACE failed", errno);
2528 }
2529 }
2530
2531 /*
2532
2533 LOCAL FUNCTION
2534
2535 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2536
2537 SYNOPSIS
2538
2539 void proc_set_exec_trap (void)
2540
2541 DESCRIPTION
2542
2543 This function is called in the child process when starting up
2544 an inferior, prior to doing the exec of the actual inferior.
2545 It sets the child process's exitset to make exit from the exec
2546 system call an event of interest to stop on, and then simply
2547 returns. The child does the exec, the system call returns, and
2548 the child stops at the first instruction, ready for the gdb
2549 parent process to take control of it.
2550
2551 NOTE
2552
2553 We need to use all local variables since the child may be sharing
2554 it's data space with the parent, if vfork was used rather than
2555 fork.
2556
2557 Also note that we want to turn off the inherit-on-fork flag in
2558 the child process so that any grand-children start with all
2559 tracing flags cleared.
2560 */
2561
2562 static void
2563 proc_set_exec_trap ()
2564 {
2565 struct sys_ctl exitset;
2566 struct sys_ctl entryset;
2567 char procname[MAX_PROC_NAME_SIZE];
2568 int fd;
2569
2570 sprintf (procname, CTL_PROC_NAME_FMT, getpid ());
2571 #ifdef UNIXWARE
2572 if ((fd = open (procname, O_WRONLY)) < 0)
2573 #else
2574 if ((fd = open (procname, O_RDWR)) < 0)
2575 #endif
2576 {
2577 perror (procname);
2578 gdb_flush (gdb_stderr);
2579 _exit (127);
2580 }
2581 premptyset (&exitset.sysset);
2582 premptyset (&entryset.sysset);
2583
2584 #ifdef PIOCSSPCACT
2585 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2586 exits from exec system calls because of the user level loader.
2587 Starting with OSF/1-4.0, tracing the entry to the exit system
2588 call no longer works. So we have to use PRFS_STOPTERM to trace
2589 termination of the inferior. */
2590 {
2591 int prfs_flags;
2592
2593 if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
2594 {
2595 perror (procname);
2596 gdb_flush (gdb_stderr);
2597 _exit (127);
2598 }
2599 prfs_flags |= PRFS_STOPEXEC | PRFS_STOPTERM;
2600 if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
2601 {
2602 perror (procname);
2603 gdb_flush (gdb_stderr);
2604 _exit (127);
2605 }
2606 }
2607 #else /* PIOCSSPCACT */
2608 /* GW: Rationale...
2609 Not all systems with /proc have all the exec* syscalls with the same
2610 names. On the SGI, for example, there is no SYS_exec, but there
2611 *is* a SYS_execv. So, we try to account for that. */
2612
2613 #ifdef SYS_exec
2614 praddset (&exitset.sysset, SYS_exec);
2615 #endif
2616 #ifdef SYS_execve
2617 praddset (&exitset.sysset, SYS_execve);
2618 #endif
2619 #ifdef SYS_execv
2620 praddset (&exitset.sysset, SYS_execv);
2621 #endif
2622
2623 #ifdef PROCFS_USE_READ_WRITE
2624 exitset.cmd = PCSEXIT;
2625 if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0)
2626 #else
2627 if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0)
2628 #endif
2629 {
2630 perror (procname);
2631 gdb_flush (gdb_stderr);
2632 _exit (127);
2633 }
2634
2635 praddset (&entryset.sysset, SYS_exit);
2636
2637 #ifdef PROCFS_USE_READ_WRITE
2638 entryset.cmd = PCSENTRY;
2639 if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0)
2640 #else
2641 if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0)
2642 #endif
2643 {
2644 perror (procname);
2645 gdb_flush (gdb_stderr);
2646 _exit (126);
2647 }
2648 #endif /* PIOCSSPCACT */
2649
2650 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2651 start with tracing flags cleared. */
2652
2653 modify_inherit_on_fork_flag (fd, 0);
2654
2655 /* Turn on run-on-last-close flag so that this process will not hang
2656 if GDB goes away for some reason. */
2657
2658 modify_run_on_last_close_flag (fd, 1);
2659
2660 #ifdef PR_ASYNC
2661 {
2662 long pr_flags;
2663 struct proc_ctl pctl;
2664
2665 /* Solaris needs this to make procfs treat all threads seperately. Without
2666 this, all threads halt whenever something happens to any thread. Since
2667 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2668
2669 pr_flags = PR_ASYNC;
2670 #ifdef PROCFS_USE_READ_WRITE
2671 pctl.cmd = PCSET;
2672 pctl.data = PR_FORK|PR_ASYNC;
2673 write (fd, (char *) &pctl, sizeof (struct proc_ctl));
2674 #else
2675 ioctl (fd, PIOCSET, &pr_flags);
2676 #endif
2677 }
2678 #endif /* PR_ASYNC */
2679 }
2680
2681 /*
2682
2683 GLOBAL FUNCTION
2684
2685 proc_iterate_over_mappings -- call function for every mapped space
2686
2687 SYNOPSIS
2688
2689 int proc_iterate_over_mappings (int (*func)())
2690
2691 DESCRIPTION
2692
2693 Given a pointer to a function, call that function for every
2694 mapped address space, passing it an open file descriptor for
2695 the file corresponding to that mapped address space (if any)
2696 and the base address of the mapped space. Quit when we hit
2697 the end of the mappings or the function returns nonzero.
2698 */
2699
2700 #ifdef UNIXWARE
2701 int
2702 proc_iterate_over_mappings (func)
2703 int (*func) PARAMS ((int, CORE_ADDR));
2704 {
2705 int nmap;
2706 int fd;
2707 int funcstat = 0;
2708 prmap_t *prmaps;
2709 prmap_t *prmap;
2710 struct procinfo *pi;
2711 struct stat sbuf;
2712
2713 pi = current_procinfo;
2714
2715 if (fstat (pi->map_fd, &sbuf) < 0)
2716 return 0;
2717
2718 nmap = sbuf.st_size / sizeof (prmap_t);
2719 prmaps = (prmap_t *) alloca (nmap * sizeof(prmap_t));
2720 if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) &&
2721 (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) ==
2722 (nmap * sizeof (prmap_t))))
2723 {
2724 int i = 0;
2725 for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i)
2726 {
2727 char name[sizeof ("/proc/1234567890/object") +
2728 sizeof (prmap->pr_mapname)];
2729 sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname);
2730 if ((fd = open (name, O_RDONLY)) == -1)
2731 {
2732 funcstat = 1;
2733 break;
2734 }
2735 funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
2736 close (fd);
2737 }
2738 }
2739 return (funcstat);
2740 }
2741 #else /* UNIXWARE */
2742 int
2743 proc_iterate_over_mappings (func)
2744 int (*func) PARAMS ((int, CORE_ADDR));
2745 {
2746 int nmap;
2747 int fd;
2748 int funcstat = 0;
2749 struct prmap *prmaps;
2750 struct prmap *prmap;
2751 struct procinfo *pi;
2752
2753 pi = current_procinfo;
2754
2755 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
2756 {
2757 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2758 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
2759 {
2760 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
2761 {
2762 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
2763 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
2764 close (fd);
2765 }
2766 }
2767 }
2768 return (funcstat);
2769 }
2770 #endif /* UNIXWARE */
2771
2772 #if 0 /* Currently unused */
2773 /*
2774
2775 GLOBAL FUNCTION
2776
2777 proc_base_address -- find base address for segment containing address
2778
2779 SYNOPSIS
2780
2781 CORE_ADDR proc_base_address (CORE_ADDR addr)
2782
2783 DESCRIPTION
2784
2785 Given an address of a location in the inferior, find and return
2786 the base address of the mapped segment containing that address.
2787
2788 This is used for example, by the shared library support code,
2789 where we have the pc value for some location in the shared library
2790 where we are stopped, and need to know the base address of the
2791 segment containing that address.
2792 */
2793
2794 CORE_ADDR
2795 proc_base_address (addr)
2796 CORE_ADDR addr;
2797 {
2798 int nmap;
2799 struct prmap *prmaps;
2800 struct prmap *prmap;
2801 CORE_ADDR baseaddr = 0;
2802 struct procinfo *pi;
2803
2804 pi = current_procinfo;
2805
2806 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
2807 {
2808 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2809 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
2810 {
2811 for (prmap = prmaps; prmap -> pr_size; ++prmap)
2812 {
2813 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
2814 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
2815 {
2816 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
2817 break;
2818 }
2819 }
2820 }
2821 }
2822 return (baseaddr);
2823 }
2824
2825 #endif /* 0 */
2826
2827 /*
2828
2829 LOCAL FUNCTION
2830
2831 proc_address_to_fd -- return open fd for file mapped to address
2832
2833 SYNOPSIS
2834
2835 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2836
2837 DESCRIPTION
2838
2839 Given an address in the current inferior's address space, use the
2840 /proc interface to find an open file descriptor for the file that
2841 this address was mapped in from. Return -1 if there is no current
2842 inferior. Print a warning message if there is an inferior but
2843 the address corresponds to no file (IE a bogus address).
2844
2845 */
2846
2847 static int
2848 proc_address_to_fd (pi, addr, complain)
2849 struct procinfo *pi;
2850 CORE_ADDR addr;
2851 int complain;
2852 {
2853 int fd = -1;
2854
2855 if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
2856 {
2857 if (complain)
2858 {
2859 print_sys_errmsg (pi->pathname, errno);
2860 warning ("can't find mapped file for address 0x%x", addr);
2861 }
2862 }
2863 return (fd);
2864 }
2865
2866
2867 /* Attach to process PID, then initialize for debugging it
2868 and wait for the trace-trap that results from attaching. */
2869
2870 static void
2871 procfs_attach (args, from_tty)
2872 char *args;
2873 int from_tty;
2874 {
2875 char *exec_file;
2876 int pid;
2877
2878 if (!args)
2879 error_no_arg ("process-id to attach");
2880
2881 pid = atoi (args);
2882
2883 if (pid == getpid()) /* Trying to masturbate? */
2884 error ("I refuse to debug myself!");
2885
2886 if (from_tty)
2887 {
2888 exec_file = (char *) get_exec_file (0);
2889
2890 if (exec_file)
2891 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
2892 else
2893 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
2894
2895 gdb_flush (gdb_stdout);
2896 }
2897
2898 inferior_pid = pid = do_attach (pid);
2899 push_target (&procfs_ops);
2900 }
2901
2902
2903 /* Take a program previously attached to and detaches it.
2904 The program resumes execution and will no longer stop
2905 on signals, etc. We'd better not have left any breakpoints
2906 in the program or it'll die when it hits one. For this
2907 to work, it may be necessary for the process to have been
2908 previously attached. It *might* work if the program was
2909 started via the normal ptrace (PTRACE_TRACEME). */
2910
2911 static void
2912 procfs_detach (args, from_tty)
2913 char *args;
2914 int from_tty;
2915 {
2916 int siggnal = 0;
2917
2918 if (from_tty)
2919 {
2920 char *exec_file = get_exec_file (0);
2921 if (exec_file == 0)
2922 exec_file = "";
2923 printf_unfiltered ("Detaching from program: %s %s\n",
2924 exec_file, target_pid_to_str (inferior_pid));
2925 gdb_flush (gdb_stdout);
2926 }
2927 if (args)
2928 siggnal = atoi (args);
2929
2930 do_detach (siggnal);
2931 inferior_pid = 0;
2932 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
2933 }
2934
2935 /* Get ready to modify the registers array. On machines which store
2936 individual registers, this doesn't need to do anything. On machines
2937 which store all the registers in one fell swoop, this makes sure
2938 that registers contains all the registers from the program being
2939 debugged. */
2940
2941 static void
2942 procfs_prepare_to_store ()
2943 {
2944 #ifdef CHILD_PREPARE_TO_STORE
2945 CHILD_PREPARE_TO_STORE ();
2946 #endif
2947 }
2948
2949 /* Print status information about what we're accessing. */
2950
2951 static void
2952 procfs_files_info (ignore)
2953 struct target_ops *ignore;
2954 {
2955 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
2956 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
2957 }
2958
2959 /* ARGSUSED */
2960 static void
2961 procfs_open (arg, from_tty)
2962 char *arg;
2963 int from_tty;
2964 {
2965 error ("Use the \"run\" command to start a Unix child process.");
2966 }
2967
2968 /*
2969
2970 LOCAL FUNCTION
2971
2972 do_attach -- attach to an already existing process
2973
2974 SYNOPSIS
2975
2976 int do_attach (int pid)
2977
2978 DESCRIPTION
2979
2980 Attach to an already existing process with the specified process
2981 id. If the process is not already stopped, query whether to
2982 stop it or not.
2983
2984 NOTES
2985
2986 The option of stopping at attach time is specific to the /proc
2987 versions of gdb. Versions using ptrace force the attachee
2988 to stop. (I have changed this version to do so, too. All you
2989 have to do is "continue" to make it go on. -- gnu@cygnus.com)
2990
2991 */
2992
2993 static int
2994 do_attach (pid)
2995 int pid;
2996 {
2997 struct procinfo *pi;
2998 struct sig_ctl sctl;
2999 struct flt_ctl fctl;
3000 int nlwp, *lwps;
3001
3002 pi = init_procinfo (pid, 0);
3003
3004 #ifdef PIOCLWPIDS
3005 nlwp = pi->prstatus.pr_nlwp;
3006 lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
3007
3008 if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
3009 {
3010 print_sys_errmsg (pi -> pathname, errno);
3011 error ("PIOCLWPIDS failed");
3012 }
3013 #else /* PIOCLWPIDS */
3014 nlwp = 1;
3015 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
3016 lwps[0] = 0;
3017 #endif
3018 for (; nlwp > 0; nlwp--, lwps++)
3019 {
3020 /* First one has already been created above. */
3021 if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
3022 pi = init_procinfo ((*lwps << 16) | pid, 0);
3023
3024 #ifdef UNIXWARE
3025 if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
3026 #else
3027 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3028 #endif
3029 {
3030 pi->was_stopped = 1;
3031 }
3032 else
3033 {
3034 pi->was_stopped = 0;
3035 if (1 || query ("Process is currently running, stop it? "))
3036 {
3037 long cmd;
3038 /* Make it run again when we close it. */
3039 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3040 #ifdef PROCFS_USE_READ_WRITE
3041 cmd = PCSTOP;
3042 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3043 #else
3044 if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
3045 #endif
3046 {
3047 print_sys_errmsg (pi->pathname, errno);
3048 close_proc_file (pi);
3049 error ("PIOCSTOP failed");
3050 }
3051 #ifdef UNIXWARE
3052 if (!procfs_read_status (pi))
3053 {
3054 print_sys_errmsg (pi->pathname, errno);
3055 close_proc_file (pi);
3056 error ("procfs_read_status failed");
3057 }
3058 #endif
3059 pi->nopass_next_sigstop = 1;
3060 }
3061 else
3062 {
3063 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3064 target_pid_to_str (pi->pid));
3065 }
3066 }
3067
3068 #ifdef PROCFS_USE_READ_WRITE
3069 fctl.cmd = PCSFAULT;
3070 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
3071 print_sys_errmsg ("PCSFAULT failed", errno);
3072 #else /* PROCFS_USE_READ_WRITE */
3073 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
3074 {
3075 print_sys_errmsg ("PIOCSFAULT failed", errno);
3076 }
3077 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
3078 {
3079 print_sys_errmsg ("PIOCSTRACE failed", errno);
3080 }
3081 add_thread (pi->pid);
3082 procfs_set_inferior_syscall_traps (pi);
3083 }
3084 #endif /* PROCFS_USE_READ_WRITE */
3085 attach_flag = 1;
3086 return (pi->pid);
3087 }
3088
3089 /*
3090
3091 LOCAL FUNCTION
3092
3093 do_detach -- detach from an attached-to process
3094
3095 SYNOPSIS
3096
3097 void do_detach (int signal)
3098
3099 DESCRIPTION
3100
3101 Detach from the current attachee.
3102
3103 If signal is non-zero, the attachee is started running again and sent
3104 the specified signal.
3105
3106 If signal is zero and the attachee was not already stopped when we
3107 attached to it, then we make it runnable again when we detach.
3108
3109 Otherwise, we query whether or not to make the attachee runnable
3110 again, since we may simply want to leave it in the state it was in
3111 when we attached.
3112
3113 We report any problems, but do not consider them errors, since we
3114 MUST detach even if some things don't seem to go right. This may not
3115 be the ideal situation. (FIXME).
3116 */
3117
3118 static void
3119 do_detach (signal)
3120 int signal;
3121 {
3122 struct procinfo *pi;
3123
3124 for (pi = procinfo_list; pi; pi = pi->next)
3125 {
3126 if (signal)
3127 {
3128 set_proc_siginfo (pi, signal);
3129 }
3130 #ifdef PROCFS_USE_READ_WRITE
3131 pi->saved_exitset.cmd = PCSEXIT;
3132 if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
3133 sizeof (struct sys_ctl)) < 0)
3134 #else
3135 if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
3136 #endif
3137 {
3138 print_sys_errmsg (pi->pathname, errno);
3139 printf_unfiltered ("PIOCSEXIT failed.\n");
3140 }
3141 #ifdef PROCFS_USE_READ_WRITE
3142 pi->saved_entryset.cmd = PCSENTRY;
3143 if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
3144 sizeof (struct sys_ctl)) < 0)
3145 #else
3146 if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
3147 #endif
3148 {
3149 print_sys_errmsg (pi->pathname, errno);
3150 printf_unfiltered ("PIOCSENTRY failed.\n");
3151 }
3152 #ifdef PROCFS_USE_READ_WRITE
3153 pi->saved_trace.cmd = PCSTRACE;
3154 if (write (pi->ctl_fd, (char *) &pi->saved_trace,
3155 sizeof (struct sig_ctl)) < 0)
3156 #else
3157 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
3158 #endif
3159 {
3160 print_sys_errmsg (pi->pathname, errno);
3161 printf_unfiltered ("PIOCSTRACE failed.\n");
3162 }
3163 #ifndef UNIXWARE
3164 if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
3165 {
3166 print_sys_errmsg (pi->pathname, errno);
3167 printf_unfiltered ("PIOSCHOLD failed.\n");
3168 }
3169 #endif
3170 #ifdef PROCFS_USE_READ_WRITE
3171 pi->saved_fltset.cmd = PCSFAULT;
3172 if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
3173 sizeof (struct flt_ctl)) < 0)
3174 #else
3175 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
3176 #endif
3177 {
3178 print_sys_errmsg (pi->pathname, errno);
3179 printf_unfiltered ("PIOCSFAULT failed.\n");
3180 }
3181 if (!procfs_read_status (pi))
3182 {
3183 print_sys_errmsg (pi->pathname, errno);
3184 printf_unfiltered ("procfs_read_status failed.\n");
3185 }
3186 else
3187 {
3188 #ifdef UNIXWARE
3189 if (signal || (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
3190 #else
3191 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
3192 #endif
3193 {
3194 long cmd;
3195 struct proc_ctl pctl;
3196
3197 if (signal || !pi->was_stopped ||
3198 query ("Was stopped when attached, make it runnable again? "))
3199 {
3200 /* Clear any pending signal if we want to detach without
3201 a signal. */
3202 if (signal == 0)
3203 set_proc_siginfo (pi, signal);
3204
3205 /* Clear any fault that might have stopped it. */
3206 #ifdef PROCFS_USE_READ_WRITE
3207 cmd = PCCFAULT;
3208 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3209 #else
3210 if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
3211 #endif
3212 {
3213 print_sys_errmsg (pi->pathname, errno);
3214 printf_unfiltered ("PIOCCFAULT failed.\n");
3215 }
3216
3217 /* Make it run again when we close it. */
3218
3219 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3220 }
3221 }
3222 }
3223 close_proc_file (pi);
3224 }
3225 attach_flag = 0;
3226 }
3227
3228 /* emulate wait() as much as possible.
3229 Wait for child to do something. Return pid of child, or -1 in case
3230 of error; store status in *OURSTATUS.
3231
3232 Not sure why we can't
3233 just use wait(), but it seems to have problems when applied to a
3234 process being controlled with the /proc interface.
3235
3236 We have a race problem here with no obvious solution. We need to let
3237 the inferior run until it stops on an event of interest, which means
3238 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3239 ioctl if the process is already stopped on something that is not an
3240 event of interest, or the call will hang indefinitely. Thus we first
3241 use PIOCSTATUS to see if the process is not stopped. If not, then we
3242 use PIOCWSTOP. But during the window between the two, if the process
3243 stops for any reason that is not an event of interest (such as a job
3244 control signal) then gdb will hang. One possible workaround is to set
3245 an alarm to wake up every minute of so and check to see if the process
3246 is still running, and if so, then reissue the PIOCWSTOP. But this is
3247 a real kludge, so has not been implemented. FIXME: investigate
3248 alternatives.
3249
3250 FIXME: Investigate why wait() seems to have problems with programs
3251 being control by /proc routines. */
3252 static int
3253 procfs_wait (pid, ourstatus)
3254 int pid;
3255 struct target_waitstatus *ourstatus;
3256 {
3257 short what;
3258 short why;
3259 int statval = 0;
3260 int checkerr = 0;
3261 int rtnval = -1;
3262 struct procinfo *pi;
3263 struct proc_ctl pctl;
3264
3265 #ifndef UNIXWARE
3266 if (pid != -1) /* Non-specific process? */
3267 pi = NULL;
3268 else
3269 for (pi = procinfo_list; pi; pi = pi->next)
3270 if (pi->had_event)
3271 break;
3272
3273 if (!pi)
3274 {
3275 wait_again:
3276
3277 if (pi)
3278 pi->had_event = 0;
3279
3280 pi = wait_fd ();
3281 }
3282
3283 if (pid != -1)
3284 for (pi = procinfo_list; pi; pi = pi->next)
3285 if (pi->pid == pid && pi->had_event)
3286 break;
3287 #endif
3288
3289 if (!pi && !checkerr)
3290 goto wait_again;
3291
3292 #ifdef UNIXWARE
3293 if (!checkerr && !(pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
3294 #else
3295 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
3296 #endif
3297 {
3298 if (!procfs_write_pcwstop (pi))
3299 {
3300 checkerr++;
3301 }
3302 }
3303 if (checkerr)
3304 {
3305 if (errno == ENOENT)
3306 {
3307 /* XXX Fixme -- what to do if attached? Can't call wait... */
3308 rtnval = wait (&statval);
3309 if ((rtnval) != (inferior_pid))
3310 {
3311 print_sys_errmsg (pi->pathname, errno);
3312 error ("procfs_wait: wait failed, returned %d", rtnval);
3313 /* NOTREACHED */
3314 }
3315 }
3316 else
3317 {
3318 print_sys_errmsg (pi->pathname, errno);
3319 error ("PIOCSTATUS or PIOCWSTOP failed.");
3320 /* NOTREACHED */
3321 }
3322 }
3323 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3324 {
3325 #ifdef UNIXWARE
3326 rtnval = pi->prstatus.pr_pid;
3327 why = pi->prstatus.pr_lwp.pr_why;
3328 what = pi->prstatus.pr_lwp.pr_what;
3329 #else
3330 rtnval = pi->pid;
3331 why = pi->prstatus.pr_why;
3332 what = pi->prstatus.pr_what;
3333 #endif
3334
3335 switch (why)
3336 {
3337 case PR_SIGNALLED:
3338 statval = (what << 8) | 0177;
3339 break;
3340 case PR_SYSENTRY:
3341 case PR_SYSEXIT:
3342 {
3343 int i;
3344 int found_handler = 0;
3345
3346 for (i = 0; i < pi->num_syscall_handlers; i++)
3347 if (pi->syscall_handlers[i].syscall_num == what)
3348 {
3349 found_handler = 1;
3350 if (!pi->syscall_handlers[i].func (pi, what, why,
3351 &rtnval, &statval))
3352 goto wait_again;
3353
3354 break;
3355 }
3356
3357 if (!found_handler)
3358 if (why == PR_SYSENTRY)
3359 error ("PR_SYSENTRY, unhandled system call %d", what);
3360 else
3361 error ("PR_SYSEXIT, unhandled system call %d", what);
3362 }
3363 break;
3364 #ifdef PR_DEAD
3365 case (short)PR_DEAD:
3366 {
3367 int dummy;
3368
3369 /* The inferior process is about to terminate.
3370 pr_what has the process's exit or return value.
3371 A PIOCRUN ioctl must be used to restart the process so it
3372 can finish exiting. */
3373
3374 #ifdef PROCFS_USE_READ_WRITE
3375 pctl.cmd = PCRUN;
3376 pctl.data = PRCFAULT;
3377 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
3378 #else
3379 pi->prrun.pr_flags = PRCFAULT;
3380 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
3381 #endif
3382 perror_with_name (pi->pathname);
3383
3384 if (wait (&dummy) < 0)
3385 rtnval = -1;
3386 statval = pi->prstatus.pr_what;
3387 }
3388 break;
3389 #endif
3390 case PR_REQUESTED:
3391 statval = (SIGSTOP << 8) | 0177;
3392 break;
3393 case PR_JOBCONTROL:
3394 statval = (what << 8) | 0177;
3395 break;
3396 case PR_FAULTED:
3397 switch (what)
3398 {
3399 #ifdef FLTWATCH
3400 case FLTWATCH:
3401 statval = (SIGTRAP << 8) | 0177;
3402 break;
3403 #endif
3404 #ifdef FLTKWATCH
3405 case FLTKWATCH:
3406 statval = (SIGTRAP << 8) | 0177;
3407 break;
3408 #endif
3409 #ifndef FAULTED_USE_SIGINFO
3410 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3411 Solaris fills in si_signo. I'm not sure about others. */
3412 case FLTPRIV:
3413 case FLTILL:
3414 statval = (SIGILL << 8) | 0177;
3415 break;
3416 case FLTBPT:
3417 case FLTTRACE:
3418 statval = (SIGTRAP << 8) | 0177;
3419 break;
3420 case FLTSTACK:
3421 case FLTACCESS:
3422 case FLTBOUNDS:
3423 statval = (SIGSEGV << 8) | 0177;
3424 break;
3425 case FLTIOVF:
3426 case FLTIZDIV:
3427 case FLTFPE:
3428 statval = (SIGFPE << 8) | 0177;
3429 break;
3430 case FLTPAGE: /* Recoverable page fault */
3431 #endif /* not FAULTED_USE_SIGINFO */
3432 default:
3433 /* Use the signal which the kernel assigns. This is better than
3434 trying to second-guess it from the fault. In fact, I suspect
3435 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3436 #ifdef UNIXWARE
3437 statval = ((pi->prstatus.pr_lwp.pr_info.si_signo) << 8) | 0177;
3438 #else
3439 statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
3440 #endif
3441 break;
3442 }
3443 break;
3444 default:
3445 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
3446 }
3447 /* Stop all the other threads when any of them stops. */
3448
3449 {
3450 struct procinfo *procinfo, *next_pi;
3451
3452 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3453 {
3454 next_pi = procinfo->next;
3455 if (!procinfo->had_event)
3456 {
3457 #ifdef PROCFS_USE_READ_WRITE
3458 cmd = PCSTOP;
3459 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3460 {
3461 print_sys_errmsg (procinfo->pathname, errno);
3462 error ("PCSTOP failed");
3463 }
3464 #else
3465 /* A bug in Solaris (2.5) causes us to hang when trying to
3466 stop a stopped process. So, we have to check first in
3467 order to avoid the hang. */
3468 if (!procfs_read_status (procinfo))
3469 {
3470 /* The LWP has apparently terminated. */
3471 if (info_verbose)
3472 printf_filtered ("LWP %d doesn't respond.\n",
3473 (procinfo->pid >> 16) & 0xffff);
3474 close_proc_file (procinfo);
3475 continue;
3476 }
3477
3478 if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
3479 if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
3480 < 0)
3481 {
3482 print_sys_errmsg (procinfo->pathname, errno);
3483 warning ("PIOCSTOP failed");
3484 }
3485 #endif
3486 }
3487 }
3488 }
3489 }
3490 else
3491 {
3492 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3493 pi->prstatus.pr_flags);
3494 }
3495
3496 store_waitstatus (ourstatus, statval);
3497
3498 if (rtnval == -1) /* No more children to wait for */
3499 {
3500 warning ("Child process unexpectedly missing");
3501 /* Claim it exited with unknown signal. */
3502 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3503 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
3504 return rtnval;
3505 }
3506
3507 pi->had_event = 0; /* Indicate that we've seen this one */
3508 return (rtnval);
3509 }
3510
3511 /*
3512
3513 LOCAL FUNCTION
3514
3515 set_proc_siginfo - set a process's current signal info
3516
3517 SYNOPSIS
3518
3519 void set_proc_siginfo (struct procinfo *pip, int signo);
3520
3521 DESCRIPTION
3522
3523 Given a pointer to a process info struct in PIP and a signal number
3524 in SIGNO, set the process's current signal and its associated signal
3525 information. The signal will be delivered to the process immediately
3526 after execution is resumed, even if it is being held. In addition,
3527 this particular delivery will not cause another PR_SIGNALLED stop
3528 even if the signal is being traced.
3529
3530 If we are not delivering the same signal that the prstatus siginfo
3531 struct contains information about, then synthesize a siginfo struct
3532 to match the signal we are doing to deliver, make it of the type
3533 "generated by a user process", and send this synthesized copy. When
3534 used to set the inferior's signal state, this will be required if we
3535 are not currently stopped because of a traced signal, or if we decide
3536 to continue with a different signal.
3537
3538 Note that when continuing the inferior from a stop due to receipt
3539 of a traced signal, we either have set PRCSIG to clear the existing
3540 signal, or we have to call this function to do a PIOCSSIG with either
3541 the existing siginfo struct from pr_info, or one we have synthesized
3542 appropriately for the signal we want to deliver. Otherwise if the
3543 signal is still being traced, the inferior will immediately stop
3544 again.
3545
3546 See siginfo(5) for more details.
3547 */
3548
3549 static void
3550 set_proc_siginfo (pip, signo)
3551 struct procinfo *pip;
3552 int signo;
3553 {
3554 struct siginfo newsiginfo;
3555 struct siginfo *sip;
3556 struct sigi_ctl sictl;
3557
3558 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3559 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3560 receives a PIOCSSIG with a signal identical to the current signal,
3561 it messes up the current signal. Work around the kernel bug. */
3562 #ifdef UNIXWARE
3563 if (signo == pip -> prstatus.pr_lwp.pr_cursig)
3564 #else
3565 if (signo == pip -> prstatus.pr_cursig)
3566 #endif
3567 return;
3568 #endif
3569
3570 #ifdef UNIXWARE
3571 if (signo == pip->prstatus.pr_lwp.pr_info.si_signo)
3572 {
3573 memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info,
3574 sizeof (siginfo_t));
3575 }
3576 #else
3577 if (signo == pip -> prstatus.pr_info.si_signo)
3578 {
3579 sip = &pip -> prstatus.pr_info;
3580 }
3581 #endif
3582 else
3583 {
3584 #ifdef UNIXWARE
3585 siginfo_t *sip = &sictl.siginfo;
3586 memset ((char *) sip, 0, sizeof (siginfo_t));
3587 #else
3588 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
3589 sip = &newsiginfo;
3590 #endif
3591 sip -> si_signo = signo;
3592 sip -> si_code = 0;
3593 sip -> si_errno = 0;
3594 sip -> si_pid = getpid ();
3595 sip -> si_uid = getuid ();
3596 }
3597 #ifdef PROCFS_USE_READ_WRITE
3598 sictl.cmd = PCSSIG;
3599 if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0)
3600 #else
3601 if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0)
3602 #endif
3603 {
3604 print_sys_errmsg (pip -> pathname, errno);
3605 warning ("PIOCSSIG failed");
3606 }
3607 }
3608
3609 /* Resume execution of process PID. If STEP is nozero, then
3610 just single step it. If SIGNAL is nonzero, restart it with that
3611 signal activated. */
3612
3613 static void
3614 procfs_resume (pid, step, signo)
3615 int pid;
3616 int step;
3617 enum target_signal signo;
3618 {
3619 int signal_to_pass;
3620 struct procinfo *pi, *procinfo, *next_pi;
3621 struct proc_ctl pctl;
3622
3623 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3624
3625 errno = 0;
3626 #ifdef UNIXWARE
3627 pctl.cmd = PCRUN;
3628 pctl.data = PRCFAULT;
3629 #else
3630 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
3631 #endif
3632
3633 #if 0
3634 /* It should not be necessary. If the user explicitly changes the value,
3635 value_assign calls write_register_bytes, which writes it. */
3636 /* It may not be absolutely necessary to specify the PC value for
3637 restarting, but to be safe we use the value that gdb considers
3638 to be current. One case where this might be necessary is if the
3639 user explicitly changes the PC value that gdb considers to be
3640 current. FIXME: Investigate if this is necessary or not. */
3641
3642 #ifdef PRSVADDR_BROKEN
3643 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3644 place to put nPC. In fact, if you use this, nPC seems to be set to some
3645 random garbage. We have to rely on the fact that PC and nPC have been
3646 written previously via PIOCSREG during a register flush. */
3647
3648 pi->prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
3649 pi->prrun.pr_flags != PRSVADDR;
3650 #endif
3651 #endif
3652
3653 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
3654 /* When attaching to a child process, if we forced it to stop with
3655 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3656 Upon resuming the first time after such a stop, we explicitly
3657 inhibit sending it another SIGSTOP, which would be the normal
3658 result of default signal handling. One potential drawback to
3659 this is that we will also ignore any attempt to by the user
3660 to explicitly continue after the attach with a SIGSTOP. Ultimately
3661 this problem should be dealt with by making the routines that
3662 deal with the inferior a little smarter, and possibly even allow
3663 an inferior to continue running at the same time as gdb. (FIXME?) */
3664 signal_to_pass = 0;
3665 else if (signo == TARGET_SIGNAL_TSTP
3666 #ifdef UNIXWARE
3667 && pi->prstatus.pr_lwp.pr_cursig == SIGTSTP
3668 && pi->prstatus.pr_lwp.pr_action.sa_handler == SIG_DFL
3669 #else
3670 && pi->prstatus.pr_cursig == SIGTSTP
3671 && pi->prstatus.pr_action.sa_handler == SIG_DFL
3672 #endif
3673 )
3674
3675 /* We are about to pass the inferior a SIGTSTP whose action is
3676 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3677 (notifying the parent via wait()), and then keep going from the
3678 same place when the parent is ready for you to keep going. So
3679 under the debugger, it should do nothing (as if the program had
3680 been stopped and then later resumed. Under ptrace, this
3681 happens for us, but under /proc, the system obligingly stops
3682 the process, and wait_for_inferior would have no way of
3683 distinguishing that type of stop (which indicates that we
3684 should just start it again), with a stop due to the pr_trace
3685 field of the prrun_t struct.
3686
3687 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3688 because the handler needs to get executed. */
3689 signal_to_pass = 0;
3690 else
3691 signal_to_pass = target_signal_to_host (signo);
3692
3693 if (signal_to_pass)
3694 {
3695 set_proc_siginfo (pi, signal_to_pass);
3696 }
3697 else
3698 {
3699 #ifdef UNIXWARE
3700 pctl.data |= PRCSIG;
3701 #else
3702 pi->prrun.pr_flags |= PRCSIG;
3703 #endif
3704 }
3705 pi->nopass_next_sigstop = 0;
3706 if (step)
3707 {
3708 #ifdef UNIXWARE
3709 pctl.data |= PRSTEP;
3710 #else
3711 pi->prrun.pr_flags |= PRSTEP;
3712 #endif
3713 }
3714 pi->had_event = 0;
3715 /* Don't try to start a process unless it's stopped on an
3716 `event of interest'. Doing so will cause errors. */
3717
3718 if (!procfs_read_status (pi))
3719 {
3720 /* The LWP has apparently terminated. */
3721 if (info_verbose)
3722 printf_filtered ("LWP %d doesn't respond.\n",
3723 (pi->pid >> 16) & 0xffff);
3724 close_proc_file (pi);
3725 }
3726 else
3727 {
3728 #ifdef PROCFS_USE_READ_WRITE
3729 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
3730 #else
3731 if ((pi->prstatus.pr_flags & PR_ISTOP)
3732 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
3733 #endif
3734 {
3735 /* The LWP has apparently terminated. */
3736 if (info_verbose)
3737 printf_filtered ("LWP %d doesn't respond.\n",
3738 (pi->pid >> 16) & 0xffff);
3739 close_proc_file (pi);
3740 }
3741 }
3742
3743 /* Continue all the other threads that haven't had an event of interest.
3744 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3745 set by do_attach, and means this is the first resume after an attach.
3746 All threads were CSTOP'd by do_attach, and should be resumed now. */
3747
3748 if (pid == -1)
3749 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3750 {
3751 next_pi = procinfo->next;
3752 if (pi != procinfo)
3753 if (!procinfo->had_event ||
3754 (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
3755 {
3756 procinfo->had_event = procinfo->nopass_next_sigstop = 0;
3757 #ifdef PROCFS_USE_READ_WRITE
3758 pctl.data = PRCFAULT | PRCSIG;
3759 if (write (procinfo->ctl_fd, (char *) &pctl,
3760 sizeof (struct proc_ctl)) < 0)
3761 {
3762 if (!procfs_read_status (procinfo))
3763 fprintf_unfiltered(gdb_stderr,
3764 "procfs_read_status failed, errno=%d\n",
3765 errno);
3766 print_sys_errmsg (procinfo->pathname, errno);
3767 error ("PCRUN failed");
3768 }
3769 procfs_read_status (procinfo);
3770 #else
3771 procinfo->prrun.pr_flags &= PRSTEP;
3772 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
3773 if (!procfs_read_status (procinfo))
3774 {
3775 /* The LWP has apparently terminated. */
3776 if (info_verbose)
3777 printf_filtered ("LWP %d doesn't respond.\n",
3778 (procinfo->pid >> 16) & 0xffff);
3779 close_proc_file (procinfo);
3780 continue;
3781 }
3782
3783 /* Don't try to start a process unless it's stopped on an
3784 `event of interest'. Doing so will cause errors. */
3785
3786 if ((procinfo->prstatus.pr_flags & PR_ISTOP)
3787 && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
3788 {
3789 if (!procfs_read_status (procinfo))
3790 fprintf_unfiltered(gdb_stderr,
3791 "procfs_read_status failed, errno=%d\n",
3792 errno);
3793 print_sys_errmsg (procinfo->pathname, errno);
3794 warning ("PIOCRUN failed");
3795 }
3796 }
3797 procfs_read_status (procinfo);
3798 #endif
3799 }
3800 }
3801
3802 /*
3803
3804 LOCAL FUNCTION
3805
3806 procfs_fetch_registers -- fetch current registers from inferior
3807
3808 SYNOPSIS
3809
3810 void procfs_fetch_registers (int regno)
3811
3812 DESCRIPTION
3813
3814 Read the current values of the inferior's registers, both the
3815 general register set and floating point registers (if supported)
3816 and update gdb's idea of their current values.
3817
3818 */
3819
3820 static void
3821 procfs_fetch_registers (regno)
3822 int regno;
3823 {
3824 struct procinfo *pi;
3825
3826 pi = current_procinfo;
3827
3828 #ifdef UNIXWARE
3829 if (procfs_read_status (pi))
3830 {
3831 supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
3832 #if defined (FP0_REGNUM)
3833 supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs);
3834 #endif
3835 }
3836 #else /* UNIXWARE */
3837 if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1)
3838 {
3839 supply_gregset (&pi->gregset.gregset);
3840 }
3841 #if defined (FP0_REGNUM)
3842 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1)
3843 {
3844 supply_fpregset (&pi->fpregset.fpregset);
3845 }
3846 #endif
3847 #endif /* UNIXWARE */
3848 }
3849
3850 /*
3851
3852 LOCAL FUNCTION
3853
3854 proc_init_failed - called when /proc access initialization fails
3855 fails
3856
3857 SYNOPSIS
3858
3859 static void proc_init_failed (struct procinfo *pi,
3860 char *why, int kill_p)
3861
3862 DESCRIPTION
3863
3864 This function is called whenever initialization of access to a /proc
3865 entry fails. It prints a suitable error message, does some cleanup,
3866 and then invokes the standard error processing routine which dumps
3867 us back into the command loop. If KILL_P is true, sends SIGKILL.
3868 */
3869
3870 static void
3871 proc_init_failed (pi, why, kill_p)
3872 struct procinfo *pi;
3873 char *why;
3874 int kill_p;
3875 {
3876 print_sys_errmsg (pi->pathname, errno);
3877 if (kill_p)
3878 kill (pi->pid, SIGKILL);
3879 close_proc_file (pi);
3880 error (why);
3881 /* NOTREACHED */
3882 }
3883
3884 /*
3885
3886 LOCAL FUNCTION
3887
3888 close_proc_file - close any currently open /proc entry
3889
3890 SYNOPSIS
3891
3892 static void close_proc_file (struct procinfo *pip)
3893
3894 DESCRIPTION
3895
3896 Close any currently open /proc entry and mark the process information
3897 entry as invalid. In order to ensure that we don't try to reuse any
3898 stale information, the pid, fd, and pathnames are explicitly
3899 invalidated, which may be overkill.
3900
3901 */
3902
3903 static void
3904 close_proc_file (pip)
3905 struct procinfo *pip;
3906 {
3907 struct procinfo *procinfo;
3908
3909 delete_thread (pip->pid); /* remove thread from GDB's thread list */
3910 remove_fd (pip); /* Remove fd from poll/select list */
3911
3912 close (pip->ctl_fd);
3913 #ifdef HAVE_MULTIPLE_PROC_FDS
3914 close (pip->as_fd);
3915 close (pip->status_fd);
3916 close (pip->map_fd);
3917 #endif
3918
3919 free (pip -> pathname);
3920
3921 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
3922
3923 if (procinfo_list == pip)
3924 procinfo_list = pip->next;
3925 else
3926 {
3927 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
3928 {
3929 if (procinfo->next == pip)
3930 {
3931 procinfo->next = pip->next;
3932 break;
3933 }
3934 }
3935 free (pip);
3936 }
3937 }
3938
3939 /*
3940
3941 LOCAL FUNCTION
3942
3943 open_proc_file - open a /proc entry for a given process id
3944
3945 SYNOPSIS
3946
3947 static int open_proc_file (int pid, struct procinfo *pip, int mode)
3948
3949 DESCRIPTION
3950
3951 Given a process id and a mode, close the existing open /proc
3952 entry (if any) and open one for the new process id, in the
3953 specified mode. Once it is open, then mark the local process
3954 information structure as valid, which guarantees that the pid,
3955 fd, and pathname fields match an open /proc entry. Returns
3956 zero if the open fails, nonzero otherwise.
3957
3958 Note that the pathname is left intact, even when the open fails,
3959 so that callers can use it to construct meaningful error messages
3960 rather than just "file open failed".
3961
3962 Note that for Solaris, the process-id also includes an LWP-id, so we
3963 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
3964 then we will ask the kernel what it is and add it to the pid. Hence,
3965 the pid can be changed by us.
3966 */
3967
3968 static int
3969 open_proc_file (pid, pip, mode, control)
3970 int pid;
3971 struct procinfo *pip;
3972 int mode;
3973 int control;
3974 {
3975 int tmp, tmpfd;
3976
3977 pip -> next = NULL;
3978 pip -> had_event = 0;
3979 pip -> pathname = xmalloc (MAX_PROC_NAME_SIZE);
3980 pip -> pid = pid;
3981
3982 #ifndef PIOCOPENLWP
3983 tmp = pid;
3984 #else
3985 tmp = pid & 0xffff;
3986 #endif
3987
3988 #ifdef HAVE_MULTIPLE_PROC_FDS
3989 sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp);
3990 if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0)
3991 {
3992 return 0;
3993 }
3994
3995 sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp);
3996 if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0)
3997 {
3998 close (pip->status_fd);
3999 return 0;
4000 }
4001
4002 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4003 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4004 {
4005 close (pip->status_fd);
4006 close (pip->as_fd);
4007 return 0;
4008 }
4009
4010 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4011 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4012 {
4013 close (pip->status_fd);
4014 close (pip->as_fd);
4015 return 0;
4016 }
4017
4018 if (control)
4019 {
4020 sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
4021 if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0)
4022 {
4023 close (pip->status_fd);
4024 close (pip->as_fd);
4025 close (pip->map_fd);
4026 return 0;
4027 }
4028 }
4029
4030 #else /* HAVE_MULTIPLE_PROC_FDS */
4031 sprintf (pip -> pathname, CTL_PROC_NAME_FMT, tmp);
4032
4033 if ((tmpfd = open (pip -> pathname, mode)) < 0)
4034 return 0;
4035
4036 #ifndef PIOCOPENLWP
4037 pip -> ctl_fd = tmpfd;
4038 pip -> as_fd = tmpfd;
4039 pip -> map_fd = tmpfd;
4040 pip -> status_fd = tmpfd;
4041 #else
4042 tmp = (pid >> 16) & 0xffff; /* Extract thread id */
4043
4044 if (tmp == 0)
4045 { /* Don't know thread id yet */
4046 if (ioctl (tmpfd, PIOCSTATUS, &pip -> prstatus) < 0)
4047 {
4048 print_sys_errmsg (pip -> pathname, errno);
4049 close (tmpfd);
4050 error ("open_proc_file: PIOCSTATUS failed");
4051 }
4052
4053 tmp = pip -> prstatus.pr_who; /* Get thread id from prstatus_t */
4054 pip -> pid = (tmp << 16) | pid; /* Update pip */
4055 }
4056
4057 if ((pip -> ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0)
4058 {
4059 close (tmpfd);
4060 return 0;
4061 }
4062
4063 #ifdef PIOCSET /* New method */
4064 {
4065 long pr_flags;
4066 pr_flags = PR_ASYNC;
4067 ioctl (pip -> ctl_fd, PIOCSET, &pr_flags);
4068 }
4069 #endif
4070
4071 /* keep extra fds in sync */
4072 pip->as_fd = pip->ctl_fd;
4073 pip->map_fd = pip->ctl_fd;
4074 pip->status_fd = pip->ctl_fd;
4075
4076 close (tmpfd); /* All done with main pid */
4077 #endif /* PIOCOPENLWP */
4078
4079 #endif /* HAVE_MULTIPLE_PROC_FDS */
4080
4081 return 1;
4082 }
4083
4084 static char *
4085 mappingflags (flags)
4086 long flags;
4087 {
4088 static char asciiflags[8];
4089
4090 strcpy (asciiflags, "-------");
4091 #if defined (MA_PHYS)
4092 if (flags & MA_PHYS) asciiflags[0] = 'd';
4093 #endif
4094 if (flags & MA_STACK) asciiflags[1] = 's';
4095 if (flags & MA_BREAK) asciiflags[2] = 'b';
4096 if (flags & MA_SHARED) asciiflags[3] = 's';
4097 if (flags & MA_READ) asciiflags[4] = 'r';
4098 if (flags & MA_WRITE) asciiflags[5] = 'w';
4099 if (flags & MA_EXEC) asciiflags[6] = 'x';
4100 return (asciiflags);
4101 }
4102
4103 static void
4104 info_proc_flags (pip, summary)
4105 struct procinfo *pip;
4106 int summary;
4107 {
4108 struct trans *transp;
4109 #ifdef UNIXWARE
4110 long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags;
4111 #else
4112 long flags = pip->prstatus.pr_flags;
4113 #endif
4114
4115 printf_filtered ("%-32s", "Process status flags:");
4116 if (!summary)
4117 {
4118 printf_filtered ("\n\n");
4119 }
4120 for (transp = pr_flag_table; transp -> name != NULL; transp++)
4121 {
4122 if (flags & transp -> value)
4123 {
4124 if (summary)
4125 {
4126 printf_filtered ("%s ", transp -> name);
4127 }
4128 else
4129 {
4130 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
4131 }
4132 }
4133 }
4134 printf_filtered ("\n");
4135 }
4136
4137 static void
4138 info_proc_stop (pip, summary)
4139 struct procinfo *pip;
4140 int summary;
4141 {
4142 struct trans *transp;
4143 int why;
4144 int what;
4145
4146 #ifdef UNIXWARE
4147 why = pip -> prstatus.pr_lwp.pr_why;
4148 what = pip -> prstatus.pr_lwp.pr_what;
4149 #else
4150 why = pip -> prstatus.pr_why;
4151 what = pip -> prstatus.pr_what;
4152 #endif
4153
4154 #ifdef UNIXWARE
4155 if (pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED)
4156 #else
4157 if (pip -> prstatus.pr_flags & PR_STOPPED)
4158 #endif
4159 {
4160 printf_filtered ("%-32s", "Reason for stopping:");
4161 if (!summary)
4162 {
4163 printf_filtered ("\n\n");
4164 }
4165 for (transp = pr_why_table; transp -> name != NULL; transp++)
4166 {
4167 if (why == transp -> value)
4168 {
4169 if (summary)
4170 {
4171 printf_filtered ("%s ", transp -> name);
4172 }
4173 else
4174 {
4175 printf_filtered ("\t%-16s %s.\n",
4176 transp -> name, transp -> desc);
4177 }
4178 break;
4179 }
4180 }
4181
4182 /* Use the pr_why field to determine what the pr_what field means, and
4183 print more information. */
4184
4185 switch (why)
4186 {
4187 case PR_REQUESTED:
4188 /* pr_what is unused for this case */
4189 break;
4190 case PR_JOBCONTROL:
4191 case PR_SIGNALLED:
4192 if (summary)
4193 {
4194 printf_filtered ("%s ", signalname (what));
4195 }
4196 else
4197 {
4198 printf_filtered ("\t%-16s %s.\n", signalname (what),
4199 safe_strsignal (what));
4200 }
4201 break;
4202 case PR_SYSENTRY:
4203 if (summary)
4204 {
4205 printf_filtered ("%s ", syscallname (what));
4206 }
4207 else
4208 {
4209 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4210 "Entered this system call");
4211 }
4212 break;
4213 case PR_SYSEXIT:
4214 if (summary)
4215 {
4216 printf_filtered ("%s ", syscallname (what));
4217 }
4218 else
4219 {
4220 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4221 "Returned from this system call");
4222 }
4223 break;
4224 case PR_FAULTED:
4225 if (summary)
4226 {
4227 printf_filtered ("%s ",
4228 lookupname (faults_table, what, "fault"));
4229 }
4230 else
4231 {
4232 printf_filtered ("\t%-16s %s.\n",
4233 lookupname (faults_table, what, "fault"),
4234 lookupdesc (faults_table, what));
4235 }
4236 break;
4237 }
4238 printf_filtered ("\n");
4239 }
4240 }
4241
4242 static void
4243 info_proc_siginfo (pip, summary)
4244 struct procinfo *pip;
4245 int summary;
4246 {
4247 struct siginfo *sip;
4248
4249 #ifdef UNIXWARE
4250 if ((pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED) &&
4251 (pip -> prstatus.pr_lwp.pr_why == PR_SIGNALLED ||
4252 pip -> prstatus.pr_lwp.pr_why == PR_FAULTED))
4253 #else
4254 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
4255 (pip -> prstatus.pr_why == PR_SIGNALLED ||
4256 pip -> prstatus.pr_why == PR_FAULTED))
4257 #endif
4258 {
4259 printf_filtered ("%-32s", "Additional signal/fault info:");
4260 #ifdef UNIXWARE
4261 sip = &pip -> prstatus.pr_lwp.pr_info;
4262 #else
4263 sip = &pip -> prstatus.pr_info;
4264 #endif
4265 if (summary)
4266 {
4267 printf_filtered ("%s ", signalname (sip -> si_signo));
4268 if (sip -> si_errno > 0)
4269 {
4270 printf_filtered ("%s ", errnoname (sip -> si_errno));
4271 }
4272 if (sip -> si_code <= 0)
4273 {
4274 printf_filtered ("sent by %s, uid %d ",
4275 target_pid_to_str (sip -> si_pid),
4276 sip -> si_uid);
4277 }
4278 else
4279 {
4280 printf_filtered ("%s ", sigcodename (sip));
4281 if ((sip -> si_signo == SIGILL) ||
4282 (sip -> si_signo == SIGFPE) ||
4283 (sip -> si_signo == SIGSEGV) ||
4284 (sip -> si_signo == SIGBUS))
4285 {
4286 printf_filtered ("addr=%#lx ",
4287 (unsigned long) sip -> si_addr);
4288 }
4289 else if ((sip -> si_signo == SIGCHLD))
4290 {
4291 printf_filtered ("child %s, status %u ",
4292 target_pid_to_str (sip -> si_pid),
4293 sip -> si_status);
4294 }
4295 else if ((sip -> si_signo == SIGPOLL))
4296 {
4297 printf_filtered ("band %u ", sip -> si_band);
4298 }
4299 }
4300 }
4301 else
4302 {
4303 printf_filtered ("\n\n");
4304 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
4305 safe_strsignal (sip -> si_signo));
4306 if (sip -> si_errno > 0)
4307 {
4308 printf_filtered ("\t%-16s %s.\n",
4309 errnoname (sip -> si_errno),
4310 safe_strerror (sip -> si_errno));
4311 }
4312 if (sip -> si_code <= 0)
4313 {
4314 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
4315 "PID of process sending signal");
4316 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
4317 "UID of process sending signal");
4318 }
4319 else
4320 {
4321 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
4322 sigcodedesc (sip));
4323 if ((sip -> si_signo == SIGILL) ||
4324 (sip -> si_signo == SIGFPE))
4325 {
4326 printf_filtered ("\t%#-16lx %s.\n",
4327 (unsigned long) sip -> si_addr,
4328 "Address of faulting instruction");
4329 }
4330 else if ((sip -> si_signo == SIGSEGV) ||
4331 (sip -> si_signo == SIGBUS))
4332 {
4333 printf_filtered ("\t%#-16lx %s.\n",
4334 (unsigned long) sip -> si_addr,
4335 "Address of faulting memory reference");
4336 }
4337 else if ((sip -> si_signo == SIGCHLD))
4338 {
4339 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
4340 "Child process ID");
4341 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
4342 "Child process exit value or signal");
4343 }
4344 else if ((sip -> si_signo == SIGPOLL))
4345 {
4346 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
4347 "Band event for POLL_{IN,OUT,MSG}");
4348 }
4349 }
4350 }
4351 printf_filtered ("\n");
4352 }
4353 }
4354
4355 static void
4356 info_proc_syscalls (pip, summary)
4357 struct procinfo *pip;
4358 int summary;
4359 {
4360 int syscallnum;
4361
4362 if (!summary)
4363 {
4364
4365 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4366 if (pip -> prstatus.pr_flags & PR_ASLEEP)
4367 {
4368 int syscallnum = pip -> prstatus.pr_reg[R_D0];
4369 if (summary)
4370 {
4371 printf_filtered ("%-32s", "Sleeping in system call:");
4372 printf_filtered ("%s", syscallname (syscallnum));
4373 }
4374 else
4375 {
4376 printf_filtered ("Sleeping in system call '%s'.\n",
4377 syscallname (syscallnum));
4378 }
4379 }
4380 #endif
4381
4382 #ifndef UNIXWARE
4383 if (ioctl (pip -> ctl_fd, PIOCGENTRY, &pip -> entryset) < 0)
4384 {
4385 print_sys_errmsg (pip -> pathname, errno);
4386 error ("PIOCGENTRY failed");
4387 }
4388
4389 if (ioctl (pip -> ctl_fd, PIOCGEXIT, &pip -> exitset) < 0)
4390 {
4391 print_sys_errmsg (pip -> pathname, errno);
4392 error ("PIOCGEXIT failed");
4393 }
4394 #endif
4395
4396 printf_filtered ("System call tracing information:\n\n");
4397
4398 printf_filtered ("\t%-12s %-8s %-8s\n",
4399 "System call",
4400 "Entry",
4401 "Exit");
4402 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
4403 {
4404 QUIT;
4405 if (syscall_table[syscallnum] != NULL)
4406 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
4407 else
4408 printf_filtered ("\t%-12d ", syscallnum);
4409
4410 #ifdef UNIXWARE
4411 printf_filtered ("%-8s ",
4412 prismember (&pip->prstatus.pr_sysentry, syscallnum)
4413 ? "on" : "off");
4414 printf_filtered ("%-8s ",
4415 prismember (&pip->prstatus.pr_sysexit, syscallnum)
4416 ? "on" : "off");
4417 #else
4418 printf_filtered ("%-8s ",
4419 prismember (&pip -> entryset, syscallnum)
4420 ? "on" : "off");
4421 printf_filtered ("%-8s ",
4422 prismember (&pip -> exitset, syscallnum)
4423 ? "on" : "off");
4424 #endif
4425 printf_filtered ("\n");
4426 }
4427 printf_filtered ("\n");
4428 }
4429 }
4430
4431 static char *
4432 signalname (signo)
4433 int signo;
4434 {
4435 const char *name;
4436 static char locbuf[32];
4437
4438 name = strsigno (signo);
4439 if (name == NULL)
4440 {
4441 sprintf (locbuf, "Signal %d", signo);
4442 }
4443 else
4444 {
4445 sprintf (locbuf, "%s (%d)", name, signo);
4446 }
4447 return (locbuf);
4448 }
4449
4450 static char *
4451 errnoname (errnum)
4452 int errnum;
4453 {
4454 const char *name;
4455 static char locbuf[32];
4456
4457 name = strerrno (errnum);
4458 if (name == NULL)
4459 {
4460 sprintf (locbuf, "Errno %d", errnum);
4461 }
4462 else
4463 {
4464 sprintf (locbuf, "%s (%d)", name, errnum);
4465 }
4466 return (locbuf);
4467 }
4468
4469 static void
4470 info_proc_signals (pip, summary)
4471 struct procinfo *pip;
4472 int summary;
4473 {
4474 int signo;
4475
4476 if (!summary)
4477 {
4478 #ifndef PROCFS_USE_READ_WRITE
4479 if (ioctl (pip -> ctl_fd, PIOCGTRACE, &pip -> trace) < 0)
4480 {
4481 print_sys_errmsg (pip -> pathname, errno);
4482 error ("PIOCGTRACE failed");
4483 }
4484 #endif
4485
4486 printf_filtered ("Disposition of signals:\n\n");
4487 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4488 "Signal", "Trace", "Hold", "Pending", "Description");
4489 for (signo = 0; signo < NSIG; signo++)
4490 {
4491 QUIT;
4492 printf_filtered ("\t%-15s ", signalname (signo));
4493 #ifdef UNIXWARE
4494 printf_filtered ("%-8s ",
4495 prismember (&pip -> prstatus.pr_sigtrace, signo)
4496 ? "on" : "off");
4497 printf_filtered ("%-8s ",
4498 prismember (&pip -> prstatus.pr_lwp.pr_context.uc_sigmask, signo)
4499 ? "on" : "off");
4500 #else
4501 printf_filtered ("%-8s ",
4502 prismember (&pip -> trace, signo)
4503 ? "on" : "off");
4504 printf_filtered ("%-8s ",
4505 prismember (&pip -> prstatus.pr_sighold, signo)
4506 ? "on" : "off");
4507 #endif
4508
4509 #ifdef UNIXWARE
4510 if (prismember (&pip->prstatus.pr_sigpend, signo) ||
4511 prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo))
4512 printf_filtered("%-8s ", "yes");
4513 else
4514 printf_filtered("%-8s ", "no");
4515 #else /* UNIXWARE */
4516 #ifdef PROCFS_SIGPEND_OFFSET
4517 /* Alpha OSF/1 numbers the pending signals from 1. */
4518 printf_filtered ("%-8s ",
4519 (signo ? prismember (&pip -> prstatus.pr_sigpend,
4520 signo - 1)
4521 : 0)
4522 ? "yes" : "no");
4523 #else
4524 printf_filtered ("%-8s ",
4525 prismember (&pip -> prstatus.pr_sigpend, signo)
4526 ? "yes" : "no");
4527 #endif
4528 #endif /* UNIXWARE */
4529 printf_filtered (" %s\n", safe_strsignal (signo));
4530 }
4531 printf_filtered ("\n");
4532 }
4533 }
4534
4535 static void
4536 info_proc_faults (pip, summary)
4537 struct procinfo *pip;
4538 int summary;
4539 {
4540 struct trans *transp;
4541
4542 if (!summary)
4543 {
4544 #ifndef UNIXWARE
4545 if (ioctl (pip -> ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0)
4546 {
4547 print_sys_errmsg (pip -> pathname, errno);
4548 error ("PIOCGFAULT failed");
4549 }
4550 #endif
4551
4552 printf_filtered ("Current traced hardware fault set:\n\n");
4553 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4554
4555 for (transp = faults_table; transp -> name != NULL; transp++)
4556 {
4557 QUIT;
4558 printf_filtered ("\t%-12s ", transp -> name);
4559 #ifdef UNIXWARE
4560 printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp -> value)
4561 ? "on" : "off");
4562 #else
4563 printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp -> value)
4564 ? "on" : "off");
4565 #endif
4566 printf_filtered ("\n");
4567 }
4568 printf_filtered ("\n");
4569 }
4570 }
4571
4572 static void
4573 info_proc_mappings (pip, summary)
4574 struct procinfo *pip;
4575 int summary;
4576 {
4577 int nmap;
4578 struct prmap *prmaps;
4579 struct prmap *prmap;
4580 struct stat sbuf;
4581
4582 if (!summary)
4583 {
4584 printf_filtered ("Mapped address spaces:\n\n");
4585 #ifdef BFD_HOST_64_BIT
4586 printf_filtered (" %18s %18s %10s %10s %7s\n",
4587 #else
4588 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4589 #endif
4590 "Start Addr",
4591 " End Addr",
4592 " Size",
4593 " Offset",
4594 "Flags");
4595 #ifdef PROCFS_USE_READ_WRITE
4596 if (fstat (pip->map_fd, &sbuf) == 0)
4597 {
4598 nmap = sbuf.st_size / sizeof (prmap_t);
4599 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4600 if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) &&
4601 (read (pip->map_fd, (char *) prmaps,
4602 nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps))))
4603 {
4604 int i = 0;
4605 for (prmap = prmaps; i < nmap; ++prmap, ++i)
4606 #else
4607 if (ioctl (pip -> ctl_fd, PIOCNMAP, &nmap) == 0)
4608 {
4609 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4610 if (ioctl (pip -> ctl_fd, PIOCMAP, prmaps) == 0)
4611 {
4612 for (prmap = prmaps; prmap -> pr_size; ++prmap)
4613 #endif /* PROCFS_USE_READ_WRITE */
4614 {
4615 #ifdef BFD_HOST_64_BIT
4616 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4617 #else
4618 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4619 #endif
4620 (unsigned long)prmap -> pr_vaddr,
4621 (unsigned long)prmap -> pr_vaddr
4622 + prmap -> pr_size - 1,
4623 prmap -> pr_size,
4624 prmap -> pr_off,
4625 mappingflags (prmap -> pr_mflags));
4626 }
4627 }
4628 }
4629 printf_filtered ("\n");
4630 }
4631 }
4632
4633 /*
4634
4635 LOCAL FUNCTION
4636
4637 info_proc -- implement the "info proc" command
4638
4639 SYNOPSIS
4640
4641 void info_proc (char *args, int from_tty)
4642
4643 DESCRIPTION
4644
4645 Implement gdb's "info proc" command by using the /proc interface
4646 to print status information about any currently running process.
4647
4648 Examples of the use of "info proc" are:
4649
4650 info proc (prints summary info for current inferior)
4651 info proc 123 (prints summary info for process with pid 123)
4652 info proc mappings (prints address mappings)
4653 info proc times (prints process/children times)
4654 info proc id (prints pid, ppid, gid, sid, etc)
4655 FIXME: i proc id not implemented.
4656 info proc status (prints general process state info)
4657 FIXME: i proc status not implemented.
4658 info proc signals (prints info about signal handling)
4659 info proc all (prints all info)
4660
4661 */
4662
4663 static void
4664 info_proc (args, from_tty)
4665 char *args;
4666 int from_tty;
4667 {
4668 int pid;
4669 struct procinfo *pip;
4670 struct cleanup *old_chain;
4671 char **argv;
4672 int argsize;
4673 int summary = 1;
4674 int flags = 0;
4675 int syscalls = 0;
4676 int signals = 0;
4677 int faults = 0;
4678 int mappings = 0;
4679 int times = 0;
4680 int id = 0;
4681 int status = 0;
4682 int all = 0;
4683 int nlwp;
4684 int *lwps;
4685
4686 old_chain = make_cleanup (null_cleanup, 0);
4687
4688 /* Default to using the current inferior if no pid specified. Note
4689 that inferior_pid may be 0, hence we set okerr. */
4690
4691 pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
4692 if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
4693 pip = procinfo_list; /* take first available */
4694 pid = pid & 0xffff; /* extract "real" pid */
4695
4696 if (args != NULL)
4697 {
4698 if ((argv = buildargv (args)) == NULL)
4699 {
4700 nomem (0);
4701 }
4702 make_cleanup (freeargv, (char *) argv);
4703
4704 while (*argv != NULL)
4705 {
4706 argsize = strlen (*argv);
4707 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
4708 {
4709 summary = 0;
4710 all = 1;
4711 }
4712 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
4713 {
4714 summary = 0;
4715 faults = 1;
4716 }
4717 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
4718 {
4719 summary = 0;
4720 flags = 1;
4721 }
4722 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
4723 {
4724 summary = 0;
4725 id = 1;
4726 }
4727 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
4728 {
4729 summary = 0;
4730 mappings = 1;
4731 }
4732 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
4733 {
4734 summary = 0;
4735 signals = 1;
4736 }
4737 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
4738 {
4739 summary = 0;
4740 status = 1;
4741 }
4742 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
4743 {
4744 summary = 0;
4745 syscalls = 1;
4746 }
4747 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
4748 {
4749 summary = 0;
4750 times = 1;
4751 }
4752 else if ((pid = atoi (*argv)) > 0)
4753 {
4754 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4755 memset (pip, 0, sizeof (*pip));
4756
4757 pip->pid = pid;
4758 if (!open_proc_file (pid, pip, O_RDONLY, 0))
4759 {
4760 perror_with_name (pip -> pathname);
4761 /* NOTREACHED */
4762 }
4763 pid = pip->pid;
4764 make_cleanup (close_proc_file, pip);
4765 }
4766 else if (**argv != '\000')
4767 {
4768 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
4769 }
4770 argv++;
4771 }
4772 }
4773
4774 /* If we don't have a valid open process at this point, then we have no
4775 inferior or didn't specify a specific pid. */
4776
4777 if (!pip)
4778 {
4779 error ("\
4780 No process. Start debugging a program or specify an explicit process ID.");
4781 }
4782
4783 if (!procfs_read_status (pip))
4784 {
4785 print_sys_errmsg (pip -> pathname, errno);
4786 error ("procfs_read_status failed");
4787 }
4788
4789 #ifndef PROCFS_USE_READ_WRITE
4790 #ifdef PIOCLWPIDS
4791 nlwp = pip->prstatus.pr_nlwp;
4792 lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
4793
4794 if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
4795 {
4796 print_sys_errmsg (pip -> pathname, errno);
4797 error ("PIOCLWPIDS failed");
4798 }
4799 #else /* PIOCLWPIDS */
4800 nlwp = 1;
4801 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
4802 lwps[0] = 0;
4803 #endif /* PIOCLWPIDS */
4804
4805 for (; nlwp > 0; nlwp--, lwps++)
4806 {
4807 pip = find_procinfo ((*lwps << 16) | pid, 1);
4808
4809 if (!pip)
4810 {
4811 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4812 memset (pip, 0, sizeof (*pip));
4813 if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0))
4814 continue;
4815
4816 make_cleanup (close_proc_file, pip);
4817
4818 if (!procfs_read_status (pip))
4819 {
4820 print_sys_errmsg (pip -> pathname, errno);
4821 error ("procfs_read_status failed");
4822 }
4823 }
4824
4825 #endif /* PROCFS_USE_READ_WRITE */
4826
4827 /* Print verbose information of the requested type(s), or just a summary
4828 of the information for all types. */
4829
4830 printf_filtered ("\nInformation for %s.%d:\n\n", pip -> pathname, *lwps);
4831 if (summary || all || flags)
4832 {
4833 info_proc_flags (pip, summary);
4834 }
4835 if (summary || all)
4836 {
4837 info_proc_stop (pip, summary);
4838 supply_gregset (&pip->prstatus.pr_reg);
4839 printf_filtered ("PC: ");
4840 print_address (read_pc (), gdb_stdout);
4841 printf_filtered ("\n");
4842 }
4843 if (summary || all || signals || faults)
4844 {
4845 info_proc_siginfo (pip, summary);
4846 }
4847 if (summary || all || syscalls)
4848 {
4849 info_proc_syscalls (pip, summary);
4850 }
4851 if (summary || all || mappings)
4852 {
4853 info_proc_mappings (pip, summary);
4854 }
4855 if (summary || all || signals)
4856 {
4857 info_proc_signals (pip, summary);
4858 }
4859 if (summary || all || faults)
4860 {
4861 info_proc_faults (pip, summary);
4862 }
4863 printf_filtered ("\n");
4864
4865 /* All done, deal with closing any temporary process info structure,
4866 freeing temporary memory , etc. */
4867
4868 do_cleanups (old_chain);
4869 #ifndef PROCFS_USE_READ_WRITE
4870 }
4871 #endif
4872 }
4873
4874 /*
4875
4876 LOCAL FUNCTION
4877
4878 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
4879
4880 SYNOPSIS
4881
4882 void modify_inherit_on_fork_flag (fd, flag)
4883
4884 DESCRIPTION
4885
4886 Call this routine to modify the inherit-on-fork flag. This routine is
4887 just a nice wrapper to hide the #ifdefs needed by various systems to
4888 control this flag.
4889
4890 */
4891
4892 static void
4893 modify_inherit_on_fork_flag (fd, flag)
4894 int fd;
4895 int flag;
4896 {
4897 #if defined (PIOCSET) || defined (PCSET)
4898 long pr_flags;
4899 #endif
4900 int retval = 0;
4901 struct proc_ctl pctl;
4902
4903 #if defined (PIOCSET) || defined (PCSET) /* New method */
4904 pr_flags = PR_FORK;
4905 if (flag)
4906 {
4907 #ifdef PROCFS_USE_READ_WRITE
4908 pctl.cmd = PCSET;
4909 pctl.data = PR_FORK;
4910 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
4911 retval = -1;
4912 #else
4913 retval = ioctl (fd, PIOCSET, &pr_flags);
4914 #endif
4915 }
4916 else
4917 {
4918 #ifdef PROCFS_USE_READ_WRITE
4919 pctl.cmd = PCRESET;
4920 pctl.data = PR_FORK;
4921 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
4922 retval = -1;
4923 #else
4924 retval = ioctl (fd, PIOCRESET, &pr_flags);
4925 #endif
4926 }
4927
4928 #else
4929 #ifdef PIOCSFORK /* Original method */
4930 if (flag)
4931 {
4932 retval = ioctl (fd, PIOCSFORK, NULL);
4933 }
4934 else
4935 {
4936 retval = ioctl (fd, PIOCRFORK, NULL);
4937 }
4938 #else
4939 Neither PR_FORK nor PIOCSFORK exist!!!
4940 #endif
4941 #endif
4942
4943 if (!retval)
4944 return;
4945
4946 print_sys_errmsg ("modify_inherit_on_fork_flag", errno);
4947 error ("PIOCSFORK or PR_FORK modification failed");
4948 }
4949
4950 /*
4951
4952 LOCAL FUNCTION
4953
4954 modify_run_on_last_close_flag - Change the run-on-last-close flag
4955
4956 SYNOPSIS
4957
4958 void modify_run_on_last_close_flag (fd, flag)
4959
4960 DESCRIPTION
4961
4962 Call this routine to modify the run-on-last-close flag. This routine
4963 is just a nice wrapper to hide the #ifdefs needed by various systems to
4964 control this flag.
4965
4966 */
4967
4968 static void
4969 modify_run_on_last_close_flag (fd, flag)
4970 int fd;
4971 int flag;
4972 {
4973 #if defined (PIOCSET) || defined (PCSET)
4974 long pr_flags;
4975 #endif
4976 int retval = 0;
4977 struct proc_ctl pctl;
4978
4979 #if defined (PIOCSET) || defined (PCSET) /* New method */
4980 pr_flags = PR_RLC;
4981 if (flag)
4982 {
4983 #ifdef PROCFS_USE_READ_WRITE
4984 pctl.cmd = PCSET;
4985 pctl.data = PR_RLC;
4986 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
4987 retval = -1;
4988 #else
4989 retval = ioctl (fd, PIOCSET, &pr_flags);
4990 #endif
4991 }
4992 else
4993 {
4994 #ifdef PROCFS_USE_READ_WRITE
4995 pctl.cmd = PCRESET;
4996 pctl.data = PR_RLC;
4997 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
4998 retval = -1;
4999 #else
5000 retval = ioctl (fd, PIOCRESET, &pr_flags);
5001 #endif
5002 }
5003
5004 #else
5005 #ifdef PIOCSRLC /* Original method */
5006 if (flag)
5007 retval = ioctl (fd, PIOCSRLC, NULL);
5008 else
5009 retval = ioctl (fd, PIOCRRLC, NULL);
5010 #else
5011 Neither PR_RLC nor PIOCSRLC exist!!!
5012 #endif
5013 #endif
5014
5015 if (!retval)
5016 return;
5017
5018 print_sys_errmsg ("modify_run_on_last_close_flag", errno);
5019 error ("PIOCSRLC or PR_RLC modification failed");
5020 }
5021
5022 /*
5023
5024 LOCAL FUNCTION
5025
5026 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5027
5028 SYNOPSIS
5029
5030 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5031
5032 DESCRIPTION
5033
5034 This function function disables traps for the specified system call.
5035 errok is non-zero if errors should be ignored.
5036 */
5037
5038 static void
5039 procfs_clear_syscall_trap (pi, syscall_num, errok)
5040 struct procinfo *pi;
5041 int syscall_num;
5042 int errok;
5043 {
5044 sysset_t sysset;
5045 int goterr, i;
5046
5047 goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
5048
5049 if (goterr && !errok)
5050 {
5051 print_sys_errmsg (pi->pathname, errno);
5052 error ("PIOCGENTRY failed");
5053 }
5054
5055 if (!goterr)
5056 {
5057 prdelset (&sysset, syscall_num);
5058
5059 if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok)
5060 {
5061 print_sys_errmsg (pi->pathname, errno);
5062 error ("PIOCSENTRY failed");
5063 }
5064 }
5065
5066 goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0;
5067
5068 if (goterr && !errok)
5069 {
5070 procfs_clear_syscall_trap (pi, syscall_num, 1);
5071 print_sys_errmsg (pi->pathname, errno);
5072 error ("PIOCGEXIT failed");
5073 }
5074
5075 if (!goterr)
5076 {
5077 praddset (&sysset, syscall_num);
5078
5079 if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok)
5080 {
5081 procfs_clear_syscall_trap (pi, syscall_num, 1);
5082 print_sys_errmsg (pi->pathname, errno);
5083 error ("PIOCSEXIT failed");
5084 }
5085 }
5086
5087 if (!pi->syscall_handlers)
5088 {
5089 if (!errok)
5090 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5091 return;
5092 }
5093
5094 /* Remove handler func from the handler list */
5095
5096 for (i = 0; i < pi->num_syscall_handlers; i++)
5097 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5098 {
5099 if (i + 1 != pi->num_syscall_handlers)
5100 { /* Not the last entry.
5101 Move subsequent entries fwd. */
5102 memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1],
5103 (pi->num_syscall_handlers - i - 1)
5104 * sizeof (struct procfs_syscall_handler));
5105 }
5106
5107 pi->syscall_handlers = xrealloc (pi->syscall_handlers,
5108 (pi->num_syscall_handlers - 1)
5109 * sizeof (struct procfs_syscall_handler));
5110 pi->num_syscall_handlers--;
5111 return;
5112 }
5113
5114 if (!errok)
5115 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5116 syscall_num);
5117 }
5118
5119 /*
5120
5121 LOCAL FUNCTION
5122
5123 procfs_set_syscall_trap -- arrange for a function to be called when the
5124 child executes the specified system call.
5125
5126 SYNOPSIS
5127
5128 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5129 syscall_func_t *function)
5130
5131 DESCRIPTION
5132
5133 This function sets up an entry and/or exit trap for the specified system
5134 call. When the child executes the specified system call, your function
5135 will be called with the call #, a flag that indicates entry or exit, and
5136 pointers to rtnval and statval (which are used by procfs_wait). The
5137 function should return non-zero if something interesting happened, zero
5138 otherwise.
5139 */
5140
5141 static void
5142 procfs_set_syscall_trap (pi, syscall_num, flags, func)
5143 struct procinfo *pi;
5144 int syscall_num;
5145 int flags;
5146 syscall_func_t *func;
5147 {
5148 sysset_t sysset;
5149
5150 if (flags & PROCFS_SYSCALL_ENTRY)
5151 {
5152 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
5153 {
5154 print_sys_errmsg (pi->pathname, errno);
5155 error ("PIOCGENTRY failed");
5156 }
5157
5158 praddset (&sysset, syscall_num);
5159
5160 if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0)
5161 {
5162 print_sys_errmsg (pi->pathname, errno);
5163 error ("PIOCSENTRY failed");
5164 }
5165 }
5166
5167 if (flags & PROCFS_SYSCALL_EXIT)
5168 {
5169 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0)
5170 {
5171 procfs_clear_syscall_trap (pi, syscall_num, 1);
5172 print_sys_errmsg (pi->pathname, errno);
5173 error ("PIOCGEXIT failed");
5174 }
5175
5176 praddset (&sysset, syscall_num);
5177
5178 if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0)
5179 {
5180 procfs_clear_syscall_trap (pi, syscall_num, 1);
5181 print_sys_errmsg (pi->pathname, errno);
5182 error ("PIOCSEXIT failed");
5183 }
5184 }
5185
5186 if (!pi->syscall_handlers)
5187 {
5188 pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler));
5189 pi->syscall_handlers[0].syscall_num = syscall_num;
5190 pi->syscall_handlers[0].func = func;
5191 pi->num_syscall_handlers = 1;
5192 }
5193 else
5194 {
5195 int i;
5196
5197 for (i = 0; i < pi->num_syscall_handlers; i++)
5198 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5199 {
5200 pi->syscall_handlers[i].func = func;
5201 return;
5202 }
5203
5204 pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1)
5205 * sizeof (struct procfs_syscall_handler));
5206 pi->syscall_handlers[i].syscall_num = syscall_num;
5207 pi->syscall_handlers[i].func = func;
5208 pi->num_syscall_handlers++;
5209 }
5210 }
5211
5212 #ifdef SYS_lwp_create
5213
5214 /*
5215
5216 LOCAL FUNCTION
5217
5218 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5219
5220 SYNOPSIS
5221
5222 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5223
5224 DESCRIPTION
5225
5226 This routine is called both when an inferior process and it's new lwp
5227 are about to finish a _lwp_create() system call. This is the system
5228 call that Solaris uses to create a lightweight process. When the
5229 target process gets this event, we can look at sysarg[2] to find the
5230 new childs lwp ID, and create a procinfo struct from that. After that,
5231 we pretend that we got a SIGTRAP, and return non-zero to tell
5232 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5233 sees the new process and continues it.
5234
5235 When we see the child exiting from lwp_create, we just contine it,
5236 since everything was handled when the parent trapped.
5237
5238 NOTES
5239 In effect, we are only paying attention to the parent's completion of
5240 the lwp_create syscall. If we only paid attention to the child
5241 instead, then we wouldn't detect the creation of a suspended thread.
5242 */
5243
5244 static int
5245 procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5246 struct procinfo *pi;
5247 int syscall_num;
5248 int why;
5249 int *rtnvalp;
5250 int *statvalp;
5251 {
5252 int lwp_id;
5253 struct procinfo *childpi;
5254
5255 /* We've just detected the completion of an lwp_create system call. Now we
5256 need to setup a procinfo struct for this thread, and notify the thread
5257 system of the new arrival. */
5258
5259 /* If lwp_create failed, then nothing interesting happened. Continue the
5260 process and go back to sleep. */
5261
5262 if (pi->prstatus.pr_reg[R_PSR] & PS_FLAG_CARRY)
5263 { /* _lwp_create failed */
5264 pi->prrun.pr_flags &= PRSTEP;
5265 pi->prrun.pr_flags |= PRCFAULT;
5266
5267 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5268 perror_with_name (pi->pathname);
5269
5270 return 0;
5271 }
5272
5273 /* At this point, the new thread is stopped at it's first instruction, and
5274 the parent is stopped at the exit from lwp_create. */
5275
5276 if (pi->new_child) /* Child? */
5277 { /* Yes, just continue it */
5278 pi->prrun.pr_flags &= PRSTEP;
5279 pi->prrun.pr_flags |= PRCFAULT;
5280
5281 if ((pi->prstatus.pr_flags & PR_ISTOP)
5282 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5283 perror_with_name (pi->pathname);
5284
5285 pi->new_child = 0; /* No longer new */
5286
5287 return 0;
5288 }
5289
5290 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5291 in the child and continue the parent. */
5292
5293 /* Third arg is pointer to new thread id. */
5294 lwp_id = read_memory_integer (pi->prstatus.pr_sysarg[2], sizeof (int));
5295
5296 lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
5297
5298 childpi = create_procinfo (lwp_id);
5299
5300 /* The new process has actually inherited the lwp_create syscall trap from
5301 it's parent, but we still have to call this to register handlers for
5302 that child. */
5303
5304 procfs_set_inferior_syscall_traps (childpi);
5305 add_thread (lwp_id);
5306 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
5307
5308 /* Continue the parent */
5309
5310 pi->prrun.pr_flags &= PRSTEP;
5311 pi->prrun.pr_flags |= PRCFAULT;
5312 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5313 perror_with_name (pi->pathname);
5314
5315 /* The new child may have been created in one of two states:
5316 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5317 If suspended, we flag it to be continued later, when it has an event. */
5318
5319 if (childpi->prstatus.pr_why == PR_SUSPENDED)
5320 childpi->new_child = 1; /* Flag this as an unseen child process */
5321 else
5322 {
5323 /* Continue the child */
5324 childpi->prrun.pr_flags &= PRSTEP;
5325 childpi->prrun.pr_flags |= PRCFAULT;
5326
5327 if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
5328 perror_with_name (childpi->pathname);
5329 }
5330 return 0;
5331 }
5332 #endif /* SYS_lwp_create */
5333
5334 /* Fork an inferior process, and start debugging it with /proc. */
5335
5336 static void
5337 procfs_create_inferior (exec_file, allargs, env)
5338 char *exec_file;
5339 char *allargs;
5340 char **env;
5341 {
5342 char *shell_file = getenv ("SHELL");
5343 char *tryname;
5344 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
5345 {
5346
5347 /* We will be looking down the PATH to find shell_file. If we
5348 just do this the normal way (via execlp, which operates by
5349 attempting an exec for each element of the PATH until it
5350 finds one which succeeds), then there will be an exec for
5351 each failed attempt, each of which will cause a PR_SYSEXIT
5352 stop, and we won't know how to distinguish the PR_SYSEXIT's
5353 for these failed execs with the ones for successful execs
5354 (whether the exec has succeeded is stored at that time in the
5355 carry bit or some such architecture-specific and
5356 non-ABI-specified place).
5357
5358 So I can't think of anything better than to search the PATH
5359 now. This has several disadvantages: (1) There is a race
5360 condition; if we find a file now and it is deleted before we
5361 exec it, we lose, even if the deletion leaves a valid file
5362 further down in the PATH, (2) there is no way to know exactly
5363 what an executable (in the sense of "capable of being
5364 exec'd") file is. Using access() loses because it may lose
5365 if the caller is the superuser; failing to use it loses if
5366 there are ACLs or some such. */
5367
5368 char *p;
5369 char *p1;
5370 /* FIXME-maybe: might want "set path" command so user can change what
5371 path is used from within GDB. */
5372 char *path = getenv ("PATH");
5373 int len;
5374 struct stat statbuf;
5375
5376 if (path == NULL)
5377 path = "/bin:/usr/bin";
5378
5379 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
5380 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
5381 {
5382 p1 = strchr (p, ':');
5383 if (p1 != NULL)
5384 len = p1 - p;
5385 else
5386 len = strlen (p);
5387 strncpy (tryname, p, len);
5388 tryname[len] = '\0';
5389 strcat (tryname, "/");
5390 strcat (tryname, shell_file);
5391 if (access (tryname, X_OK) < 0)
5392 continue;
5393 if (stat (tryname, &statbuf) < 0)
5394 continue;
5395 if (!S_ISREG (statbuf.st_mode))
5396 /* We certainly need to reject directories. I'm not quite
5397 as sure about FIFOs, sockets, etc., but I kind of doubt
5398 that people want to exec() these things. */
5399 continue;
5400 break;
5401 }
5402 if (p == NULL)
5403 /* Not found. This must be an error rather than merely passing
5404 the file to execlp(), because execlp() would try all the
5405 exec()s, causing GDB to get confused. */
5406 error ("Can't find shell %s in PATH", shell_file);
5407
5408 shell_file = tryname;
5409 }
5410
5411 fork_inferior (exec_file, allargs, env,
5412 proc_set_exec_trap, procfs_init_inferior, shell_file);
5413
5414 /* We are at the first instruction we care about. */
5415 /* Pedal to the metal... */
5416
5417 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
5418 }
5419
5420 /* Clean up after the inferior dies. */
5421
5422 static void
5423 procfs_mourn_inferior ()
5424 {
5425 struct procinfo *pi;
5426 struct procinfo *next_pi;
5427
5428 for (pi = procinfo_list; pi; pi = next_pi)
5429 {
5430 next_pi = pi->next;
5431 unconditionally_kill_inferior (pi);
5432 }
5433
5434 unpush_target (&procfs_ops);
5435 generic_mourn_inferior ();
5436 }
5437
5438
5439 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5440 static int
5441 procfs_can_run ()
5442 {
5443 /* This variable is controlled by modules that sit atop procfs that may layer
5444 their own process structure atop that provided here. sol-thread.c does
5445 this because of the Solaris two-level thread model. */
5446
5447 return !procfs_suppress_run;
5448 }
5449 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5450 \f
5451 /* Insert a watchpoint */
5452 int
5453 procfs_set_watchpoint(pid, addr, len, rw)
5454 int pid;
5455 CORE_ADDR addr;
5456 int len;
5457 int rw;
5458 {
5459 struct procinfo *pi;
5460 prwatch_t wpt;
5461
5462 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5463 wpt.pr_vaddr = (caddr_t)addr;
5464 wpt.pr_size = len;
5465 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
5466 if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0)
5467 {
5468 if (errno == E2BIG)
5469 return -1;
5470 /* Currently it sometimes happens that the same watchpoint gets
5471 deleted twice - don't die in this case (FIXME please) */
5472 if (errno == ESRCH && len == 0)
5473 return 0;
5474 print_sys_errmsg (pi->pathname, errno);
5475 error ("PIOCSWATCH failed");
5476 }
5477 return 0;
5478 }
5479
5480 int
5481 procfs_stopped_by_watchpoint(pid)
5482 int pid;
5483 {
5484 struct procinfo *pi;
5485 short what;
5486 short why;
5487
5488 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5489 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
5490 {
5491 why = pi->prstatus.pr_why;
5492 what = pi->prstatus.pr_what;
5493 if (why == PR_FAULTED
5494 #if defined (FLTWATCH) && defined (FLTKWATCH)
5495 && (what == FLTWATCH || what == FLTKWATCH)
5496 #else
5497 #ifdef FLTWATCH
5498 && (what == FLTWATCH)
5499 #endif
5500 #ifdef FLTKWATCH
5501 && (what == FLTKWATCH)
5502 #endif
5503 #endif
5504 )
5505 return what;
5506 }
5507 return 0;
5508 }
5509 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5510
5511 /* Why is this necessary? Shouldn't dead threads just be removed from the
5512 thread database? */
5513
5514 static int
5515 procfs_thread_alive (pid)
5516 int pid;
5517 {
5518 struct procinfo *pi, *next_pi;
5519
5520 for (pi = procinfo_list; pi; pi = next_pi)
5521 {
5522 next_pi = pi->next;
5523 if (pi -> pid == pid)
5524 if (procfs_read_status (pi)) /* alive */
5525 return 1;
5526 else /* defunct (exited) */
5527 {
5528 close_proc_file (pi);
5529 return 0;
5530 }
5531 }
5532 return 0;
5533 }
5534
5535 int
5536 procfs_first_available ()
5537 {
5538 struct procinfo *pi;
5539
5540 for (pi = procinfo_list; pi; pi = pi->next)
5541 {
5542 if (procfs_read_status (pi))
5543 return pi->pid;
5544 }
5545 return -1;
5546 }
5547
5548 /* Send a SIGINT to the process group. This acts just like the user typed a
5549 ^C on the controlling terminal.
5550
5551 XXX - This may not be correct for all systems. Some may want to use
5552 killpg() instead of kill (-pgrp). */
5553
5554 static void
5555 procfs_stop ()
5556 {
5557 extern pid_t inferior_process_group;
5558
5559 kill (-inferior_process_group, SIGINT);
5560 }
5561 \f
5562 /* Convert a pid to printable form. */
5563
5564 #ifdef TIDGET
5565 char *
5566 procfs_pid_to_str (pid)
5567 int pid;
5568 {
5569 static char buf[100];
5570
5571 sprintf (buf, "Kernel thread %d", TIDGET (pid));
5572
5573 return buf;
5574 }
5575 #endif /* TIDGET */
5576 \f
5577 struct target_ops procfs_ops = {
5578 "procfs", /* to_shortname */
5579 "Unix /proc child process", /* to_longname */
5580 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
5581 procfs_open, /* to_open */
5582 0, /* to_close */
5583 procfs_attach, /* to_attach */
5584 procfs_detach, /* to_detach */
5585 procfs_resume, /* to_resume */
5586 procfs_wait, /* to_wait */
5587 procfs_fetch_registers, /* to_fetch_registers */
5588 procfs_store_registers, /* to_store_registers */
5589 procfs_prepare_to_store, /* to_prepare_to_store */
5590 procfs_xfer_memory, /* to_xfer_memory */
5591 procfs_files_info, /* to_files_info */
5592 memory_insert_breakpoint, /* to_insert_breakpoint */
5593 memory_remove_breakpoint, /* to_remove_breakpoint */
5594 terminal_init_inferior, /* to_terminal_init */
5595 terminal_inferior, /* to_terminal_inferior */
5596 terminal_ours_for_output, /* to_terminal_ours_for_output */
5597 terminal_ours, /* to_terminal_ours */
5598 child_terminal_info, /* to_terminal_info */
5599 procfs_kill_inferior, /* to_kill */
5600 0, /* to_load */
5601 0, /* to_lookup_symbol */
5602 procfs_create_inferior, /* to_create_inferior */
5603 procfs_mourn_inferior, /* to_mourn_inferior */
5604 procfs_can_run, /* to_can_run */
5605 procfs_notice_signals, /* to_notice_signals */
5606 procfs_thread_alive, /* to_thread_alive */
5607 procfs_stop, /* to_stop */
5608 process_stratum, /* to_stratum */
5609 0, /* to_next */
5610 1, /* to_has_all_memory */
5611 1, /* to_has_memory */
5612 1, /* to_has_stack */
5613 1, /* to_has_registers */
5614 1, /* to_has_execution */
5615 0, /* sections */
5616 0, /* sections_end */
5617 OPS_MAGIC /* to_magic */
5618 };
5619
5620 void
5621 _initialize_procfs ()
5622 {
5623 #ifdef HAVE_OPTIONAL_PROC_FS
5624 char procname[MAX_PROC_NAME_SIZE];
5625 int fd;
5626
5627 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5628 don't add procfs support if we cannot access the running
5629 GDB via /proc. */
5630 sprintf (procname, STATUS_PROC_NAME_FMT, getpid ());
5631 if ((fd = open (procname, O_RDONLY)) < 0)
5632 return;
5633 close (fd);
5634 #endif
5635
5636 add_target (&procfs_ops);
5637
5638 add_info ("processes", info_proc,
5639 "Show process status information using /proc entry.\n\
5640 Specify process id or use current inferior by default.\n\
5641 Specify keywords for detailed information; default is summary.\n\
5642 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5643 `status', `syscalls', and `times'.\n\
5644 Unambiguous abbreviations may be used.");
5645
5646 init_syscall_table ();
5647 }