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c906108c SS |
1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2 | Copyright 1991, 1992-98, 1999 Free Software Foundation, Inc. | |
3 | Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs | |
4 | compatibility by Geoffrey Noer at Cygnus Solutions. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | ||
23 | /* N O T E S | |
24 | ||
25 | For information on the details of using /proc consult section proc(4) | |
26 | in the UNIX System V Release 4 System Administrator's Reference Manual. | |
27 | ||
28 | The general register and floating point register sets are manipulated | |
29 | separately. This file makes the assumption that if FP0_REGNUM is | |
30 | defined, then support for the floating point register set is desired, | |
31 | regardless of whether or not the actual target has floating point hardware. | |
32 | ||
33 | */ | |
34 | ||
35 | ||
36 | #include "defs.h" | |
37 | ||
38 | #include <sys/types.h> | |
39 | #include <time.h> | |
40 | #include <sys/fault.h> | |
41 | #include <sys/syscall.h> | |
42 | #include <sys/procfs.h> | |
43 | #include <fcntl.h> | |
44 | #include <errno.h> | |
45 | #include "gdb_string.h" | |
46 | #include <stropts.h> | |
47 | #include <poll.h> | |
48 | #include <unistd.h> | |
49 | #include "gdb_stat.h" | |
50 | ||
51 | #include "inferior.h" | |
52 | #include "target.h" | |
53 | #include "command.h" | |
54 | #include "gdbcore.h" | |
55 | #include "gdbthread.h" | |
56 | ||
57 | #if !defined(SYS_lwp_create) && defined(SYS_lwpcreate) | |
58 | # define SYS_lwp_create SYS_lwpcreate | |
59 | #endif | |
60 | ||
61 | #if !defined(SYS_lwp_exit) && defined(SYS_lwpexit) | |
62 | # define SYS_lwp_exit SYS_lwpexit | |
63 | #endif | |
64 | ||
65 | #if !defined(SYS_lwp_wait) && defined(SYS_lwpwait) | |
66 | # define SYS_lwp_wait SYS_lwpwait | |
67 | #endif | |
68 | ||
69 | #if !defined(SYS_lwp_self) && defined(SYS_lwpself) | |
70 | # define SYS_lwp_self SYS_lwpself | |
71 | #endif | |
72 | ||
73 | #if !defined(SYS_lwp_info) && defined(SYS_lwpinfo) | |
74 | # define SYS_lwp_info SYS_lwpinfo | |
75 | #endif | |
76 | ||
77 | #if !defined(SYS_lwp_private) && defined(SYS_lwpprivate) | |
78 | # define SYS_lwp_private SYS_lwpprivate | |
79 | #endif | |
80 | ||
81 | #if !defined(SYS_lwp_kill) && defined(SYS_lwpkill) | |
82 | # define SYS_lwp_kill SYS_lwpkill | |
83 | #endif | |
84 | ||
85 | #if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend) | |
86 | # define SYS_lwp_suspend SYS_lwpsuspend | |
87 | #endif | |
88 | ||
89 | #if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue) | |
90 | # define SYS_lwp_continue SYS_lwpcontinue | |
91 | #endif | |
92 | ||
93 | /* the name of the proc status struct depends on the implementation */ | |
94 | /* Wrap Light Weight Process member in THE_PR_LWP macro for clearer code */ | |
95 | #ifndef HAVE_PSTATUS_T | |
96 | typedef prstatus_t gdb_prstatus_t; | |
97 | #define THE_PR_LWP(a) a | |
98 | #else /* HAVE_PSTATUS_T */ | |
99 | typedef pstatus_t gdb_prstatus_t; | |
100 | #define THE_PR_LWP(a) a.pr_lwp | |
101 | #if !defined(HAVE_PRRUN_T) && defined(HAVE_MULTIPLE_PROC_FDS) | |
102 | /* Fallback definitions - for using configure information directly */ | |
103 | #ifndef UNIXWARE | |
104 | #define UNIXWARE 1 | |
105 | #endif | |
106 | #if !defined(PROCFS_USE_READ_WRITE) && !defined(HAVE_PROCFS_PIOCSET) | |
107 | #define PROCFS_USE_READ_WRITE 1 | |
108 | #endif | |
109 | #endif /* !HAVE_PRRUN_T && HAVE_MULTIPLE_PROC_FDS */ | |
110 | #endif /* HAVE_PSTATUS_T */ | |
111 | ||
112 | #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */ | |
113 | ||
114 | /* proc name formats may vary depending on the proc implementation */ | |
115 | #ifdef HAVE_MULTIPLE_PROC_FDS | |
116 | # ifndef CTL_PROC_NAME_FMT | |
117 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
118 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
119 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
120 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
121 | # endif | |
122 | #else /* HAVE_MULTIPLE_PROC_FDS */ | |
123 | # ifndef CTL_PROC_NAME_FMT | |
124 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
125 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
126 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
127 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
128 | # endif | |
129 | #endif /* HAVE_MULTIPLE_PROC_FDS */ | |
130 | ||
131 | ||
132 | /* These #ifdefs are for sol2.x in particular. sol2.x has | |
133 | both a "gregset_t" and a "prgregset_t", which have | |
134 | similar uses but different layouts. sol2.x gdb tries to | |
135 | use prgregset_t (and prfpregset_t) everywhere. */ | |
136 | ||
137 | #ifdef GDB_GREGSET_TYPE | |
138 | typedef GDB_GREGSET_TYPE gdb_gregset_t; | |
139 | #else | |
140 | typedef gregset_t gdb_gregset_t; | |
141 | #endif | |
142 | ||
143 | #ifdef GDB_FPREGSET_TYPE | |
144 | typedef GDB_FPREGSET_TYPE gdb_fpregset_t; | |
145 | #else | |
146 | typedef fpregset_t gdb_fpregset_t; | |
147 | #endif | |
148 | ||
149 | ||
150 | #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status") | |
151 | ||
152 | struct target_ops procfs_ops; | |
153 | ||
154 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to | |
155 | be a runnable target. Used by targets | |
156 | that can sit atop procfs, such as solaris | |
157 | thread support. */ | |
158 | ||
159 | #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */ | |
160 | CORE_ADDR kernel_u_addr; | |
161 | #endif | |
162 | ||
163 | #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */ | |
164 | #undef si_pid | |
165 | #define si_pid _data._proc.pid | |
166 | #undef si_uid | |
167 | #define si_uid _data._proc._pdata._kill.uid | |
168 | #endif /* BROKEN_SIGINFO_H */ | |
169 | ||
170 | /* Define structures for passing commands to /proc/pid/ctl file. Note that | |
171 | while we create these for the PROCFS_USE_READ_WRITE world, we use them | |
172 | and ignore the extra cmd int in other proc schemes. | |
173 | */ | |
174 | /* generic ctl msg */ | |
175 | struct proc_ctl { | |
176 | int cmd; | |
177 | long data; | |
178 | }; | |
179 | ||
180 | /* set general registers */ | |
181 | struct greg_ctl { | |
182 | int cmd; | |
183 | gdb_gregset_t gregset; | |
184 | }; | |
185 | ||
186 | /* set fp registers */ | |
187 | struct fpreg_ctl { | |
188 | int cmd; | |
189 | gdb_fpregset_t fpregset; | |
190 | }; | |
191 | ||
192 | /* set signals to be traced */ | |
193 | struct sig_ctl { | |
194 | int cmd; | |
195 | sigset_t sigset; | |
196 | }; | |
197 | ||
198 | /* set faults to be traced */ | |
199 | struct flt_ctl { | |
200 | int cmd; | |
201 | fltset_t fltset; | |
202 | }; | |
203 | ||
204 | /* set system calls to be traced */ | |
205 | struct sys_ctl { | |
206 | int cmd; | |
207 | sysset_t sysset; | |
208 | }; | |
209 | ||
210 | /* set current signal to be traced */ | |
211 | struct sigi_ctl { | |
212 | int cmd; | |
213 | siginfo_t siginfo; | |
214 | }; | |
215 | ||
216 | /* All access to the inferior, either one started by gdb or one that has | |
217 | been attached to, is controlled by an instance of a procinfo structure, | |
218 | defined below. Since gdb currently only handles one inferior at a time, | |
219 | the procinfo structure for the inferior is statically allocated and | |
220 | only one exists at any given time. There is a separate procinfo | |
221 | structure for use by the "info proc" command, so that we can print | |
222 | useful information about any random process without interfering with | |
223 | the inferior's procinfo information. */ | |
224 | ||
225 | struct procinfo { | |
226 | struct procinfo *next; | |
227 | int pid; /* Process ID of inferior */ | |
228 | int ctl_fd; /* File descriptor for /proc ctl file */ | |
229 | int status_fd; /* File descriptor for /proc status file */ | |
230 | int as_fd; /* File descriptor for /proc as file */ | |
231 | int map_fd; /* File descriptor for /proc map file */ | |
232 | char *pathname; /* Pathname to /proc entry */ | |
233 | int had_event; /* poll/select says something happened */ | |
234 | int was_stopped; /* Nonzero if was stopped prior to attach */ | |
235 | int nopass_next_sigstop; /* Don't pass a sigstop on next resume */ | |
236 | #ifdef HAVE_PRRUN_T | |
237 | prrun_t prrun; /* Control state when it is run */ | |
238 | #endif | |
239 | gdb_prstatus_t prstatus; /* Current process status info */ | |
240 | struct greg_ctl gregset; /* General register set */ | |
241 | struct fpreg_ctl fpregset; /* Floating point register set */ | |
242 | struct flt_ctl fltset; /* Current traced hardware fault set */ | |
243 | struct sig_ctl trace; /* Current traced signal set */ | |
244 | struct sys_ctl exitset; /* Current traced system call exit set */ | |
245 | struct sys_ctl entryset; /* Current traced system call entry set */ | |
246 | struct sig_ctl saved_sighold; /* Saved held signal set */ | |
247 | struct flt_ctl saved_fltset; /* Saved traced hardware fault set */ | |
248 | struct sig_ctl saved_trace; /* Saved traced signal set */ | |
249 | struct sys_ctl saved_exitset; /* Saved traced system call exit set */ | |
250 | struct sys_ctl saved_entryset;/* Saved traced system call entry set */ | |
251 | int num_syscall_handlers; /* Number of syscall trap handlers | |
252 | currently installed */ | |
253 | /* Pointer to list of syscall trap handlers */ | |
254 | struct procfs_syscall_handler *syscall_handlers; | |
255 | int saved_rtnval; /* return value and status for wait(), */ | |
256 | int saved_statval; /* as supplied by a syscall handler. */ | |
257 | int new_child; /* Non-zero if it's a new thread */ | |
258 | }; | |
259 | ||
260 | /* List of inferior process information */ | |
261 | static struct procinfo *procinfo_list = NULL; | |
262 | static struct pollfd *poll_list; /* pollfds used for waiting on /proc */ | |
263 | ||
264 | static int num_poll_list = 0; /* Number of entries in poll_list */ | |
265 | ||
266 | /* Much of the information used in the /proc interface, particularly for | |
267 | printing status information, is kept as tables of structures of the | |
268 | following form. These tables can be used to map numeric values to | |
269 | their symbolic names and to a string that describes their specific use. */ | |
270 | ||
271 | struct trans { | |
272 | int value; /* The numeric value */ | |
273 | char *name; /* The equivalent symbolic value */ | |
274 | char *desc; /* Short description of value */ | |
275 | }; | |
276 | ||
277 | /* Translate bits in the pr_flags member of the prstatus structure, into the | |
278 | names and desc information. */ | |
279 | ||
280 | static struct trans pr_flag_table[] = | |
281 | { | |
282 | #if defined (PR_STOPPED) | |
283 | { PR_STOPPED, "PR_STOPPED", "Process is stopped" }, | |
284 | #endif | |
285 | #if defined (PR_ISTOP) | |
286 | { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" }, | |
287 | #endif | |
288 | #if defined (PR_DSTOP) | |
289 | { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" }, | |
290 | #endif | |
291 | #if defined (PR_ASLEEP) | |
292 | { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" }, | |
293 | #endif | |
294 | #if defined (PR_FORK) | |
295 | { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" }, | |
296 | #endif | |
297 | #if defined (PR_RLC) | |
298 | { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" }, | |
299 | #endif | |
300 | #if defined (PR_PTRACE) | |
301 | { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" }, | |
302 | #endif | |
303 | #if defined (PR_PCINVAL) | |
304 | { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" }, | |
305 | #endif | |
306 | #if defined (PR_ISSYS) | |
307 | { PR_ISSYS, "PR_ISSYS", "Is a system process" }, | |
308 | #endif | |
309 | #if defined (PR_STEP) | |
310 | { PR_STEP, "PR_STEP", "Process has single step pending" }, | |
311 | #endif | |
312 | #if defined (PR_KLC) | |
313 | { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" }, | |
314 | #endif | |
315 | #if defined (PR_ASYNC) | |
316 | { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" }, | |
317 | #endif | |
318 | #if defined (PR_PCOMPAT) | |
319 | { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" }, | |
320 | #endif | |
321 | #if defined (PR_MSACCT) | |
322 | { PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled" }, | |
323 | #endif | |
324 | #if defined (PR_BPTADJ) | |
325 | { PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect" }, | |
326 | #endif | |
327 | #if defined (PR_ASLWP) | |
328 | { PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP" }, | |
329 | #endif | |
330 | { 0, NULL, NULL } | |
331 | }; | |
332 | ||
333 | /* Translate values in the pr_why field of the prstatus struct. */ | |
334 | ||
335 | static struct trans pr_why_table[] = | |
336 | { | |
337 | #if defined (PR_REQUESTED) | |
338 | { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" }, | |
339 | #endif | |
340 | #if defined (PR_SIGNALLED) | |
341 | { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" }, | |
342 | #endif | |
343 | #if defined (PR_SYSENTRY) | |
344 | { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" }, | |
345 | #endif | |
346 | #if defined (PR_SYSEXIT) | |
347 | { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" }, | |
348 | #endif | |
349 | #if defined (PR_JOBCONTROL) | |
350 | { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" }, | |
351 | #endif | |
352 | #if defined (PR_FAULTED) | |
353 | { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" }, | |
354 | #endif | |
355 | #if defined (PR_SUSPENDED) | |
356 | { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" }, | |
357 | #endif | |
358 | #if defined (PR_CHECKPOINT) | |
359 | { PR_CHECKPOINT, "PR_CHECKPOINT", "(???)" }, | |
360 | #endif | |
361 | { 0, NULL, NULL } | |
362 | }; | |
363 | ||
364 | /* Hardware fault translation table. */ | |
365 | ||
366 | static struct trans faults_table[] = | |
367 | { | |
368 | #if defined (FLTILL) | |
369 | { FLTILL, "FLTILL", "Illegal instruction" }, | |
370 | #endif | |
371 | #if defined (FLTPRIV) | |
372 | { FLTPRIV, "FLTPRIV", "Privileged instruction" }, | |
373 | #endif | |
374 | #if defined (FLTBPT) | |
375 | { FLTBPT, "FLTBPT", "Breakpoint trap" }, | |
376 | #endif | |
377 | #if defined (FLTTRACE) | |
378 | { FLTTRACE, "FLTTRACE", "Trace trap" }, | |
379 | #endif | |
380 | #if defined (FLTACCESS) | |
381 | { FLTACCESS, "FLTACCESS", "Memory access fault" }, | |
382 | #endif | |
383 | #if defined (FLTBOUNDS) | |
384 | { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" }, | |
385 | #endif | |
386 | #if defined (FLTIOVF) | |
387 | { FLTIOVF, "FLTIOVF", "Integer overflow" }, | |
388 | #endif | |
389 | #if defined (FLTIZDIV) | |
390 | { FLTIZDIV, "FLTIZDIV", "Integer zero divide" }, | |
391 | #endif | |
392 | #if defined (FLTFPE) | |
393 | { FLTFPE, "FLTFPE", "Floating-point exception" }, | |
394 | #endif | |
395 | #if defined (FLTSTACK) | |
396 | { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" }, | |
397 | #endif | |
398 | #if defined (FLTPAGE) | |
399 | { FLTPAGE, "FLTPAGE", "Recoverable page fault" }, | |
400 | #endif | |
401 | { 0, NULL, NULL } | |
402 | }; | |
403 | ||
404 | /* Translation table for signal generation information. See UNIX System | |
405 | V Release 4 Programmer's Reference Manual, siginfo(5). */ | |
406 | ||
407 | static struct sigcode { | |
408 | int signo; | |
409 | int code; | |
410 | char *codename; | |
411 | char *desc; | |
412 | } siginfo_table[] = { | |
413 | #if defined (SIGILL) && defined (ILL_ILLOPC) | |
414 | { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" }, | |
415 | #endif | |
416 | #if defined (SIGILL) && defined (ILL_ILLOPN) | |
417 | { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", }, | |
418 | #endif | |
419 | #if defined (SIGILL) && defined (ILL_ILLADR) | |
420 | { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" }, | |
421 | #endif | |
422 | #if defined (SIGILL) && defined (ILL_ILLTRP) | |
423 | { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" }, | |
424 | #endif | |
425 | #if defined (SIGILL) && defined (ILL_PRVOPC) | |
426 | { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" }, | |
427 | #endif | |
428 | #if defined (SIGILL) && defined (ILL_PRVREG) | |
429 | { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" }, | |
430 | #endif | |
431 | #if defined (SIGILL) && defined (ILL_COPROC) | |
432 | { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" }, | |
433 | #endif | |
434 | #if defined (SIGILL) && defined (ILL_BADSTK) | |
435 | { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" }, | |
436 | #endif | |
437 | #if defined (SIGFPE) && defined (FPE_INTDIV) | |
438 | { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" }, | |
439 | #endif | |
440 | #if defined (SIGFPE) && defined (FPE_INTOVF) | |
441 | { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" }, | |
442 | #endif | |
443 | #if defined (SIGFPE) && defined (FPE_FLTDIV) | |
444 | { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" }, | |
445 | #endif | |
446 | #if defined (SIGFPE) && defined (FPE_FLTOVF) | |
447 | { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" }, | |
448 | #endif | |
449 | #if defined (SIGFPE) && defined (FPE_FLTUND) | |
450 | { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" }, | |
451 | #endif | |
452 | #if defined (SIGFPE) && defined (FPE_FLTRES) | |
453 | { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" }, | |
454 | #endif | |
455 | #if defined (SIGFPE) && defined (FPE_FLTINV) | |
456 | { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" }, | |
457 | #endif | |
458 | #if defined (SIGFPE) && defined (FPE_FLTSUB) | |
459 | { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" }, | |
460 | #endif | |
461 | #if defined (SIGSEGV) && defined (SEGV_MAPERR) | |
462 | { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" }, | |
463 | #endif | |
464 | #if defined (SIGSEGV) && defined (SEGV_ACCERR) | |
465 | { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" }, | |
466 | #endif | |
467 | #if defined (SIGBUS) && defined (BUS_ADRALN) | |
468 | { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" }, | |
469 | #endif | |
470 | #if defined (SIGBUS) && defined (BUS_ADRERR) | |
471 | { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" }, | |
472 | #endif | |
473 | #if defined (SIGBUS) && defined (BUS_OBJERR) | |
474 | { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" }, | |
475 | #endif | |
476 | #if defined (SIGTRAP) && defined (TRAP_BRKPT) | |
477 | { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" }, | |
478 | #endif | |
479 | #if defined (SIGTRAP) && defined (TRAP_TRACE) | |
480 | { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" }, | |
481 | #endif | |
482 | #if defined (SIGCLD) && defined (CLD_EXITED) | |
483 | { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" }, | |
484 | #endif | |
485 | #if defined (SIGCLD) && defined (CLD_KILLED) | |
486 | { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" }, | |
487 | #endif | |
488 | #if defined (SIGCLD) && defined (CLD_DUMPED) | |
489 | { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" }, | |
490 | #endif | |
491 | #if defined (SIGCLD) && defined (CLD_TRAPPED) | |
492 | { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" }, | |
493 | #endif | |
494 | #if defined (SIGCLD) && defined (CLD_STOPPED) | |
495 | { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" }, | |
496 | #endif | |
497 | #if defined (SIGCLD) && defined (CLD_CONTINUED) | |
498 | { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" }, | |
499 | #endif | |
500 | #if defined (SIGPOLL) && defined (POLL_IN) | |
501 | { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" }, | |
502 | #endif | |
503 | #if defined (SIGPOLL) && defined (POLL_OUT) | |
504 | { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" }, | |
505 | #endif | |
506 | #if defined (SIGPOLL) && defined (POLL_MSG) | |
507 | { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" }, | |
508 | #endif | |
509 | #if defined (SIGPOLL) && defined (POLL_ERR) | |
510 | { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" }, | |
511 | #endif | |
512 | #if defined (SIGPOLL) && defined (POLL_PRI) | |
513 | { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" }, | |
514 | #endif | |
515 | #if defined (SIGPOLL) && defined (POLL_HUP) | |
516 | { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" }, | |
517 | #endif | |
518 | { 0, 0, NULL, NULL } | |
519 | }; | |
520 | ||
521 | static char *syscall_table[MAX_SYSCALLS]; | |
522 | ||
523 | /* Prototypes for local functions */ | |
524 | ||
525 | static void procfs_stop PARAMS ((void)); | |
526 | ||
527 | static int procfs_thread_alive PARAMS ((int)); | |
528 | ||
529 | static int procfs_can_run PARAMS ((void)); | |
530 | ||
531 | static void procfs_mourn_inferior PARAMS ((void)); | |
532 | ||
533 | static void procfs_fetch_registers PARAMS ((int)); | |
534 | ||
535 | static int procfs_wait PARAMS ((int, struct target_waitstatus *)); | |
536 | ||
537 | static void procfs_open PARAMS ((char *, int)); | |
538 | ||
539 | static void procfs_files_info PARAMS ((struct target_ops *)); | |
540 | ||
541 | static void procfs_prepare_to_store PARAMS ((void)); | |
542 | ||
543 | static void procfs_detach PARAMS ((char *, int)); | |
544 | ||
545 | static void procfs_attach PARAMS ((char *, int)); | |
546 | ||
547 | static void proc_set_exec_trap PARAMS ((void)); | |
548 | ||
549 | static void procfs_init_inferior PARAMS ((int)); | |
550 | ||
551 | static struct procinfo *create_procinfo PARAMS ((int)); | |
552 | ||
553 | static void procfs_store_registers PARAMS ((int)); | |
554 | ||
555 | static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *)); | |
556 | ||
557 | static void procfs_kill_inferior PARAMS ((void)); | |
558 | ||
559 | static char *sigcodedesc PARAMS ((siginfo_t *)); | |
560 | ||
561 | static char *sigcodename PARAMS ((siginfo_t *)); | |
562 | ||
563 | static struct procinfo *wait_fd PARAMS ((void)); | |
564 | ||
565 | static void remove_fd PARAMS ((struct procinfo *)); | |
566 | ||
567 | static void add_fd PARAMS ((struct procinfo *)); | |
568 | ||
569 | static void set_proc_siginfo PARAMS ((struct procinfo *, int)); | |
570 | ||
571 | static void init_syscall_table PARAMS ((void)); | |
572 | ||
573 | static char *syscallname PARAMS ((int)); | |
574 | ||
575 | static char *signalname PARAMS ((int)); | |
576 | ||
577 | static char *errnoname PARAMS ((int)); | |
578 | ||
579 | static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int)); | |
580 | ||
581 | static int open_proc_file PARAMS ((int, struct procinfo *, int, int)); | |
582 | ||
583 | static void close_proc_file PARAMS ((struct procinfo *)); | |
584 | ||
7a292a7a SS |
585 | static void close_proc_file_cleanup PARAMS ((void*)); |
586 | ||
587 | static struct cleanup *make_cleanup_close_proc_file PARAMS ((struct procinfo *)); | |
588 | ||
c906108c SS |
589 | static void unconditionally_kill_inferior PARAMS ((struct procinfo *)); |
590 | ||
591 | static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN; | |
592 | ||
593 | static void info_proc PARAMS ((char *, int)); | |
594 | ||
595 | static void info_proc_flags PARAMS ((struct procinfo *, int)); | |
596 | ||
597 | static void info_proc_stop PARAMS ((struct procinfo *, int)); | |
598 | ||
599 | static void info_proc_siginfo PARAMS ((struct procinfo *, int)); | |
600 | ||
601 | static void info_proc_syscalls PARAMS ((struct procinfo *, int)); | |
602 | ||
603 | static void info_proc_mappings PARAMS ((struct procinfo *, int)); | |
604 | ||
605 | static void info_proc_signals PARAMS ((struct procinfo *, int)); | |
606 | ||
607 | static void info_proc_faults PARAMS ((struct procinfo *, int)); | |
608 | ||
609 | static char *mappingflags PARAMS ((long)); | |
610 | ||
611 | static char *lookupname PARAMS ((struct trans *, unsigned int, char *)); | |
612 | ||
613 | static char *lookupdesc PARAMS ((struct trans *, unsigned int)); | |
614 | ||
615 | static int do_attach PARAMS ((int pid)); | |
616 | ||
617 | static void do_detach PARAMS ((int siggnal)); | |
618 | ||
619 | static void procfs_create_inferior PARAMS ((char *, char *, char **)); | |
620 | ||
621 | static void procfs_notice_signals PARAMS ((int pid)); | |
622 | ||
623 | static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *)); | |
624 | ||
625 | static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail)); | |
626 | ||
627 | static int procfs_write_pcwstop PARAMS ((struct procinfo *)); | |
628 | static int procfs_read_status PARAMS ((struct procinfo *)); | |
629 | static void procfs_write_pckill PARAMS ((struct procinfo *)); | |
630 | ||
631 | typedef int syscall_func_t PARAMS ((struct procinfo *pi, int syscall_num, | |
632 | int why, int *rtnval, int *statval)); | |
633 | ||
634 | static void procfs_set_syscall_trap PARAMS ((struct procinfo *pi, | |
635 | int syscall_num, int flags, | |
636 | syscall_func_t *func)); | |
637 | ||
638 | static void procfs_clear_syscall_trap PARAMS ((struct procinfo *pi, | |
639 | int syscall_num, int errok)); | |
640 | ||
641 | #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */ | |
642 | #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */ | |
643 | ||
644 | static syscall_func_t procfs_exit_handler; | |
645 | ||
646 | static syscall_func_t procfs_exec_handler; | |
647 | ||
648 | #ifdef SYS_sproc | |
649 | static syscall_func_t procfs_sproc_handler; | |
650 | static syscall_func_t procfs_fork_handler; | |
651 | #endif | |
652 | ||
653 | #ifdef SYS_lwp_create | |
654 | static syscall_func_t procfs_lwp_creation_handler; | |
655 | #endif | |
656 | ||
657 | static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag)); | |
658 | static void modify_run_on_last_close_flag PARAMS ((int fd, int flag)); | |
659 | ||
660 | /* */ | |
661 | ||
662 | struct procfs_syscall_handler | |
663 | { | |
664 | int syscall_num; /* The number of the system call being handled */ | |
665 | /* The function to be called */ | |
666 | syscall_func_t *func; | |
667 | }; | |
668 | ||
669 | static void procfs_resume PARAMS ((int pid, int step, | |
670 | enum target_signal signo)); | |
671 | ||
672 | static void init_procfs_ops PARAMS ((void)); | |
673 | ||
674 | /* External function prototypes that can't be easily included in any | |
675 | header file because the args are typedefs in system include files. */ | |
676 | ||
677 | extern void supply_gregset PARAMS ((gdb_gregset_t *)); | |
678 | ||
679 | extern void fill_gregset PARAMS ((gdb_gregset_t *, int)); | |
680 | ||
681 | #ifdef FP0_REGNUM | |
682 | extern void supply_fpregset PARAMS ((gdb_fpregset_t *)); | |
683 | ||
684 | extern void fill_fpregset PARAMS ((gdb_fpregset_t *, int)); | |
685 | #endif | |
686 | ||
687 | /* | |
688 | ||
689 | LOCAL FUNCTION | |
690 | ||
691 | find_procinfo -- convert a process id to a struct procinfo | |
692 | ||
693 | SYNOPSIS | |
694 | ||
695 | static struct procinfo * find_procinfo (pid_t pid, int okfail); | |
696 | ||
697 | DESCRIPTION | |
698 | ||
699 | Given a process id, look it up in the procinfo chain. Returns | |
700 | a struct procinfo *. If can't find pid, then call error(), | |
701 | unless okfail is set, in which case, return NULL; | |
702 | */ | |
703 | ||
704 | static struct procinfo * | |
705 | find_procinfo (pid, okfail) | |
706 | pid_t pid; | |
707 | int okfail; | |
708 | { | |
709 | struct procinfo *procinfo; | |
710 | ||
711 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) | |
712 | if (procinfo->pid == pid) | |
713 | return procinfo; | |
714 | ||
715 | if (okfail) | |
716 | return NULL; | |
717 | ||
718 | error ("procfs (find_procinfo): Couldn't locate pid %d", pid); | |
719 | } | |
720 | ||
721 | /* | |
722 | ||
723 | LOCAL MACRO | |
724 | ||
725 | current_procinfo -- convert inferior_pid to a struct procinfo | |
726 | ||
727 | SYNOPSIS | |
728 | ||
729 | static struct procinfo * current_procinfo; | |
730 | ||
731 | DESCRIPTION | |
732 | ||
733 | Looks up inferior_pid in the procinfo chain. Always returns a | |
734 | struct procinfo *. If process can't be found, we error() out. | |
735 | */ | |
736 | ||
737 | #define current_procinfo find_procinfo (inferior_pid, 0) | |
738 | ||
739 | /* | |
740 | ||
741 | LOCAL FUNCTION | |
742 | ||
743 | add_fd -- Add the fd to the poll/select list | |
744 | ||
745 | SYNOPSIS | |
746 | ||
747 | static void add_fd (struct procinfo *); | |
748 | ||
749 | DESCRIPTION | |
750 | ||
751 | Add the fd of the supplied procinfo to the list of fds used for | |
752 | poll/select operations. | |
753 | */ | |
754 | ||
755 | static void | |
756 | add_fd (pi) | |
757 | struct procinfo *pi; | |
758 | { | |
759 | if (num_poll_list <= 0) | |
760 | poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd)); | |
761 | else | |
762 | poll_list = (struct pollfd *) xrealloc (poll_list, | |
763 | (num_poll_list + 1) | |
764 | * sizeof (struct pollfd)); | |
765 | poll_list[num_poll_list].fd = pi->ctl_fd; | |
766 | #ifdef UNIXWARE | |
767 | poll_list[num_poll_list].events = POLLWRNORM; | |
768 | #else | |
769 | poll_list[num_poll_list].events = POLLPRI; | |
770 | #endif | |
771 | ||
772 | num_poll_list++; | |
773 | } | |
774 | ||
775 | /* | |
776 | ||
777 | LOCAL FUNCTION | |
778 | ||
779 | remove_fd -- Remove the fd from the poll/select list | |
780 | ||
781 | SYNOPSIS | |
782 | ||
783 | static void remove_fd (struct procinfo *); | |
784 | ||
785 | DESCRIPTION | |
786 | ||
787 | Remove the fd of the supplied procinfo from the list of fds used | |
788 | for poll/select operations. | |
789 | */ | |
790 | ||
791 | static void | |
792 | remove_fd (pi) | |
793 | struct procinfo *pi; | |
794 | { | |
795 | int i; | |
796 | ||
797 | for (i = 0; i < num_poll_list; i++) | |
798 | { | |
799 | if (poll_list[i].fd == pi->ctl_fd) | |
800 | { | |
801 | if (i != num_poll_list - 1) | |
802 | memcpy (poll_list + i, poll_list + i + 1, | |
803 | (num_poll_list - i - 1) * sizeof (struct pollfd)); | |
804 | ||
805 | num_poll_list--; | |
806 | ||
807 | if (num_poll_list == 0) | |
808 | free (poll_list); | |
809 | else | |
810 | poll_list = (struct pollfd *) xrealloc (poll_list, | |
811 | num_poll_list | |
812 | * sizeof (struct pollfd)); | |
813 | return; | |
814 | } | |
815 | } | |
816 | } | |
817 | ||
818 | /* | |
819 | ||
820 | LOCAL FUNCTION | |
821 | ||
822 | procfs_read_status - get procfs fd status | |
823 | ||
824 | SYNOPSIS | |
825 | ||
826 | static int procfs_read_status (pi) struct procinfo *pi; | |
827 | ||
828 | DESCRIPTION | |
829 | ||
830 | Given a pointer to a procinfo struct, get the status of | |
831 | the status_fd in the appropriate way. Returns 0 on failure, | |
832 | 1 on success. | |
833 | */ | |
834 | ||
835 | static int | |
836 | procfs_read_status (pi) | |
837 | struct procinfo *pi; | |
838 | { | |
839 | #ifdef PROCFS_USE_READ_WRITE | |
840 | if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) || | |
841 | (read (pi->status_fd, (char *) &pi->prstatus, | |
842 | sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t))) | |
843 | #else | |
844 | if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0) | |
845 | #endif | |
846 | return 0; | |
847 | else | |
848 | return 1; | |
849 | } | |
850 | ||
851 | /* | |
852 | ||
853 | LOCAL FUNCTION | |
854 | ||
855 | procfs_write_pcwstop - send a PCWSTOP to procfs fd | |
856 | ||
857 | SYNOPSIS | |
858 | ||
859 | static int procfs_write_pcwstop (pi) struct procinfo *pi; | |
860 | ||
861 | DESCRIPTION | |
862 | ||
863 | Given a pointer to a procinfo struct, send a PCWSTOP to | |
864 | the ctl_fd in the appropriate way. Returns 0 on failure, | |
865 | 1 on success. | |
866 | */ | |
867 | ||
868 | static int | |
869 | procfs_write_pcwstop (pi) | |
870 | struct procinfo *pi; | |
871 | { | |
872 | #ifdef PROCFS_USE_READ_WRITE | |
873 | long cmd = PCWSTOP; | |
874 | if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0) | |
875 | #else | |
876 | if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0) | |
877 | #endif | |
878 | return 0; | |
879 | else | |
880 | return 1; | |
881 | } | |
882 | ||
883 | /* | |
884 | ||
885 | LOCAL FUNCTION | |
886 | ||
887 | procfs_write_pckill - send a kill to procfs fd | |
888 | ||
889 | SYNOPSIS | |
890 | ||
891 | static void procfs_write_pckill (pi) struct procinfo *pi; | |
892 | ||
893 | DESCRIPTION | |
894 | ||
895 | Given a pointer to a procinfo struct, send a kill to | |
896 | the ctl_fd in the appropriate way. Returns 0 on failure, | |
897 | 1 on success. | |
898 | */ | |
899 | ||
900 | static void | |
901 | procfs_write_pckill (pi) | |
902 | struct procinfo *pi; | |
903 | { | |
904 | #ifdef PROCFS_USE_READ_WRITE | |
905 | struct proc_ctl pctl; | |
906 | pctl.cmd = PCKILL; | |
907 | pctl.data = SIGKILL; | |
908 | write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl)); | |
909 | #else | |
910 | int signo = SIGKILL; | |
911 | ioctl (pi->ctl_fd, PIOCKILL, &signo); | |
912 | #endif | |
913 | } | |
914 | ||
915 | static struct procinfo * | |
916 | wait_fd () | |
917 | { | |
918 | struct procinfo *pi, *next_pi; | |
919 | #ifndef LOSING_POLL | |
920 | int num_fds; | |
921 | int i; | |
922 | #endif | |
923 | ||
924 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
925 | attached process. */ | |
926 | set_sigio_trap (); | |
927 | ||
928 | wait_again: | |
929 | #ifndef LOSING_POLL | |
930 | while (1) | |
931 | { | |
932 | num_fds = poll (poll_list, num_poll_list, -1); | |
933 | if (num_fds > 0) | |
934 | break; | |
935 | if (num_fds < 0 && errno == EINTR) | |
936 | continue; | |
937 | print_sys_errmsg ("poll failed", errno); | |
938 | error ("Poll failed, returned %d", num_fds); | |
939 | } | |
940 | #else /* LOSING_POLL */ | |
941 | pi = current_procinfo; | |
942 | ||
943 | while (!procfs_write_pcwstop (pi)) | |
944 | { | |
945 | if (errno == ENOENT) | |
946 | { | |
947 | /* Process exited. */ | |
948 | pi->prstatus.pr_flags = 0; | |
949 | break; | |
950 | } | |
951 | else if (errno != EINTR) | |
952 | { | |
953 | print_sys_errmsg (pi->pathname, errno); | |
954 | error ("procfs_write_pcwstop failed"); | |
955 | } | |
956 | } | |
957 | pi->had_event = 1; | |
958 | #endif /* LOSING_POLL */ | |
959 | ||
960 | clear_sigint_trap (); | |
961 | clear_sigio_trap (); | |
962 | ||
963 | #ifndef LOSING_POLL | |
964 | ||
965 | for (i = 0; i < num_poll_list && num_fds > 0; i++) | |
966 | { | |
967 | if (0 == (poll_list[i].revents & | |
968 | (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL))) | |
969 | continue; | |
970 | for (pi = procinfo_list; pi; pi = next_pi) | |
971 | { | |
972 | next_pi = pi->next; | |
973 | if (poll_list[i].fd == pi->ctl_fd) | |
974 | { | |
975 | num_fds--; | |
976 | if ((poll_list[i].revents & POLLHUP) != 0 || | |
977 | !procfs_read_status(pi)) | |
978 | { /* The LWP has apparently terminated. */ | |
979 | if (num_poll_list <= 1) | |
980 | { | |
981 | pi->prstatus.pr_flags = 0; | |
982 | pi->had_event = 1; | |
983 | break; | |
984 | } | |
985 | if (info_verbose) | |
986 | printf_filtered ("LWP %d exited.\n", | |
987 | (pi->pid >> 16) & 0xffff); | |
988 | close_proc_file (pi); | |
989 | i--; /* don't skip deleted entry */ | |
990 | if (num_fds != 0) | |
991 | break; /* already another event to process */ | |
992 | else | |
993 | goto wait_again; /* wait for another event */ | |
994 | } | |
995 | pi->had_event = 1; | |
996 | break; | |
997 | } | |
998 | } | |
999 | if (!pi) | |
1000 | error ("wait_fd: Couldn't find procinfo for fd %d\n", | |
1001 | poll_list[i].fd); | |
1002 | } | |
1003 | #endif /* LOSING_POLL */ | |
1004 | ||
1005 | return pi; | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | ||
1010 | LOCAL FUNCTION | |
1011 | ||
1012 | lookupdesc -- translate a value to a summary desc string | |
1013 | ||
1014 | SYNOPSIS | |
1015 | ||
1016 | static char *lookupdesc (struct trans *transp, unsigned int val); | |
1017 | ||
1018 | DESCRIPTION | |
1019 | ||
1020 | Given a pointer to a translation table and a value to be translated, | |
1021 | lookup the desc string and return it. | |
1022 | */ | |
1023 | ||
1024 | static char * | |
1025 | lookupdesc (transp, val) | |
1026 | struct trans *transp; | |
1027 | unsigned int val; | |
1028 | { | |
1029 | char *desc; | |
1030 | ||
1031 | for (desc = NULL; transp -> name != NULL; transp++) | |
1032 | { | |
1033 | if (transp -> value == val) | |
1034 | { | |
1035 | desc = transp -> desc; | |
1036 | break; | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | /* Didn't find a translation for the specified value, set a default one. */ | |
1041 | ||
1042 | if (desc == NULL) | |
1043 | { | |
1044 | desc = "Unknown"; | |
1045 | } | |
1046 | return (desc); | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | ||
1051 | LOCAL FUNCTION | |
1052 | ||
1053 | lookupname -- translate a value to symbolic name | |
1054 | ||
1055 | SYNOPSIS | |
1056 | ||
1057 | static char *lookupname (struct trans *transp, unsigned int val, | |
1058 | char *prefix); | |
1059 | ||
1060 | DESCRIPTION | |
1061 | ||
1062 | Given a pointer to a translation table, a value to be translated, | |
1063 | and a default prefix to return if the value can't be translated, | |
1064 | match the value with one of the translation table entries and | |
1065 | return a pointer to the symbolic name. | |
1066 | ||
1067 | If no match is found it just returns the value as a printable string, | |
1068 | with the given prefix. The previous such value, if any, is freed | |
1069 | at this time. | |
1070 | */ | |
1071 | ||
1072 | static char * | |
1073 | lookupname (transp, val, prefix) | |
1074 | struct trans *transp; | |
1075 | unsigned int val; | |
1076 | char *prefix; | |
1077 | { | |
1078 | static char *locbuf; | |
1079 | char *name; | |
1080 | ||
1081 | for (name = NULL; transp -> name != NULL; transp++) | |
1082 | { | |
1083 | if (transp -> value == val) | |
1084 | { | |
1085 | name = transp -> name; | |
1086 | break; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | /* Didn't find a translation for the specified value, build a default | |
1091 | one using the specified prefix and return it. The lifetime of | |
1092 | the value is only until the next one is needed. */ | |
1093 | ||
1094 | if (name == NULL) | |
1095 | { | |
1096 | if (locbuf != NULL) | |
1097 | { | |
1098 | free (locbuf); | |
1099 | } | |
1100 | locbuf = xmalloc (strlen (prefix) + 16); | |
1101 | sprintf (locbuf, "%s %u", prefix, val); | |
1102 | name = locbuf; | |
1103 | } | |
1104 | return (name); | |
1105 | } | |
1106 | ||
1107 | static char * | |
1108 | sigcodename (sip) | |
1109 | siginfo_t *sip; | |
1110 | { | |
1111 | struct sigcode *scp; | |
1112 | char *name = NULL; | |
1113 | static char locbuf[32]; | |
1114 | ||
1115 | for (scp = siginfo_table; scp -> codename != NULL; scp++) | |
1116 | { | |
1117 | if ((scp -> signo == sip -> si_signo) && | |
1118 | (scp -> code == sip -> si_code)) | |
1119 | { | |
1120 | name = scp -> codename; | |
1121 | break; | |
1122 | } | |
1123 | } | |
1124 | if (name == NULL) | |
1125 | { | |
1126 | sprintf (locbuf, "sigcode %u", sip -> si_signo); | |
1127 | name = locbuf; | |
1128 | } | |
1129 | return (name); | |
1130 | } | |
1131 | ||
1132 | static char * | |
1133 | sigcodedesc (sip) | |
1134 | siginfo_t *sip; | |
1135 | { | |
1136 | struct sigcode *scp; | |
1137 | char *desc = NULL; | |
1138 | ||
1139 | for (scp = siginfo_table; scp -> codename != NULL; scp++) | |
1140 | { | |
1141 | if ((scp -> signo == sip -> si_signo) && | |
1142 | (scp -> code == sip -> si_code)) | |
1143 | { | |
1144 | desc = scp -> desc; | |
1145 | break; | |
1146 | } | |
1147 | } | |
1148 | if (desc == NULL) | |
1149 | { | |
1150 | desc = "Unrecognized signal or trap use"; | |
1151 | } | |
1152 | return (desc); | |
1153 | } | |
1154 | ||
1155 | /* | |
1156 | ||
1157 | LOCAL FUNCTION | |
1158 | ||
1159 | syscallname - translate a system call number into a system call name | |
1160 | ||
1161 | SYNOPSIS | |
1162 | ||
1163 | char *syscallname (int syscallnum) | |
1164 | ||
1165 | DESCRIPTION | |
1166 | ||
1167 | Given a system call number, translate it into the printable name | |
1168 | of a system call, or into "syscall <num>" if it is an unknown | |
1169 | number. | |
1170 | */ | |
1171 | ||
1172 | static char * | |
1173 | syscallname (syscallnum) | |
1174 | int syscallnum; | |
1175 | { | |
1176 | static char locbuf[32]; | |
1177 | ||
1178 | if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS | |
1179 | && syscall_table[syscallnum] != NULL) | |
1180 | return syscall_table[syscallnum]; | |
1181 | else | |
1182 | { | |
1183 | sprintf (locbuf, "syscall %u", syscallnum); | |
1184 | return locbuf; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | ||
1190 | LOCAL FUNCTION | |
1191 | ||
1192 | init_syscall_table - initialize syscall translation table | |
1193 | ||
1194 | SYNOPSIS | |
1195 | ||
1196 | void init_syscall_table (void) | |
1197 | ||
1198 | DESCRIPTION | |
1199 | ||
1200 | Dynamically initialize the translation table to convert system | |
1201 | call numbers into printable system call names. Done once per | |
1202 | gdb run, on initialization. | |
1203 | ||
1204 | NOTES | |
1205 | ||
1206 | This is awfully ugly, but preprocessor tricks to make it prettier | |
1207 | tend to be nonportable. | |
1208 | */ | |
1209 | ||
1210 | static void | |
1211 | init_syscall_table () | |
1212 | { | |
1213 | #if defined (SYS_exit) | |
1214 | syscall_table[SYS_exit] = "exit"; | |
1215 | #endif | |
1216 | #if defined (SYS_fork) | |
1217 | syscall_table[SYS_fork] = "fork"; | |
1218 | #endif | |
1219 | #if defined (SYS_read) | |
1220 | syscall_table[SYS_read] = "read"; | |
1221 | #endif | |
1222 | #if defined (SYS_write) | |
1223 | syscall_table[SYS_write] = "write"; | |
1224 | #endif | |
1225 | #if defined (SYS_open) | |
1226 | syscall_table[SYS_open] = "open"; | |
1227 | #endif | |
1228 | #if defined (SYS_close) | |
1229 | syscall_table[SYS_close] = "close"; | |
1230 | #endif | |
1231 | #if defined (SYS_wait) | |
1232 | syscall_table[SYS_wait] = "wait"; | |
1233 | #endif | |
1234 | #if defined (SYS_creat) | |
1235 | syscall_table[SYS_creat] = "creat"; | |
1236 | #endif | |
1237 | #if defined (SYS_link) | |
1238 | syscall_table[SYS_link] = "link"; | |
1239 | #endif | |
1240 | #if defined (SYS_unlink) | |
1241 | syscall_table[SYS_unlink] = "unlink"; | |
1242 | #endif | |
1243 | #if defined (SYS_exec) | |
1244 | syscall_table[SYS_exec] = "exec"; | |
1245 | #endif | |
1246 | #if defined (SYS_execv) | |
1247 | syscall_table[SYS_execv] = "execv"; | |
1248 | #endif | |
1249 | #if defined (SYS_execve) | |
1250 | syscall_table[SYS_execve] = "execve"; | |
1251 | #endif | |
1252 | #if defined (SYS_chdir) | |
1253 | syscall_table[SYS_chdir] = "chdir"; | |
1254 | #endif | |
1255 | #if defined (SYS_time) | |
1256 | syscall_table[SYS_time] = "time"; | |
1257 | #endif | |
1258 | #if defined (SYS_mknod) | |
1259 | syscall_table[SYS_mknod] = "mknod"; | |
1260 | #endif | |
1261 | #if defined (SYS_chmod) | |
1262 | syscall_table[SYS_chmod] = "chmod"; | |
1263 | #endif | |
1264 | #if defined (SYS_chown) | |
1265 | syscall_table[SYS_chown] = "chown"; | |
1266 | #endif | |
1267 | #if defined (SYS_brk) | |
1268 | syscall_table[SYS_brk] = "brk"; | |
1269 | #endif | |
1270 | #if defined (SYS_stat) | |
1271 | syscall_table[SYS_stat] = "stat"; | |
1272 | #endif | |
1273 | #if defined (SYS_lseek) | |
1274 | syscall_table[SYS_lseek] = "lseek"; | |
1275 | #endif | |
1276 | #if defined (SYS_getpid) | |
1277 | syscall_table[SYS_getpid] = "getpid"; | |
1278 | #endif | |
1279 | #if defined (SYS_mount) | |
1280 | syscall_table[SYS_mount] = "mount"; | |
1281 | #endif | |
1282 | #if defined (SYS_umount) | |
1283 | syscall_table[SYS_umount] = "umount"; | |
1284 | #endif | |
1285 | #if defined (SYS_setuid) | |
1286 | syscall_table[SYS_setuid] = "setuid"; | |
1287 | #endif | |
1288 | #if defined (SYS_getuid) | |
1289 | syscall_table[SYS_getuid] = "getuid"; | |
1290 | #endif | |
1291 | #if defined (SYS_stime) | |
1292 | syscall_table[SYS_stime] = "stime"; | |
1293 | #endif | |
1294 | #if defined (SYS_ptrace) | |
1295 | syscall_table[SYS_ptrace] = "ptrace"; | |
1296 | #endif | |
1297 | #if defined (SYS_alarm) | |
1298 | syscall_table[SYS_alarm] = "alarm"; | |
1299 | #endif | |
1300 | #if defined (SYS_fstat) | |
1301 | syscall_table[SYS_fstat] = "fstat"; | |
1302 | #endif | |
1303 | #if defined (SYS_pause) | |
1304 | syscall_table[SYS_pause] = "pause"; | |
1305 | #endif | |
1306 | #if defined (SYS_utime) | |
1307 | syscall_table[SYS_utime] = "utime"; | |
1308 | #endif | |
1309 | #if defined (SYS_stty) | |
1310 | syscall_table[SYS_stty] = "stty"; | |
1311 | #endif | |
1312 | #if defined (SYS_gtty) | |
1313 | syscall_table[SYS_gtty] = "gtty"; | |
1314 | #endif | |
1315 | #if defined (SYS_access) | |
1316 | syscall_table[SYS_access] = "access"; | |
1317 | #endif | |
1318 | #if defined (SYS_nice) | |
1319 | syscall_table[SYS_nice] = "nice"; | |
1320 | #endif | |
1321 | #if defined (SYS_statfs) | |
1322 | syscall_table[SYS_statfs] = "statfs"; | |
1323 | #endif | |
1324 | #if defined (SYS_sync) | |
1325 | syscall_table[SYS_sync] = "sync"; | |
1326 | #endif | |
1327 | #if defined (SYS_kill) | |
1328 | syscall_table[SYS_kill] = "kill"; | |
1329 | #endif | |
1330 | #if defined (SYS_fstatfs) | |
1331 | syscall_table[SYS_fstatfs] = "fstatfs"; | |
1332 | #endif | |
1333 | #if defined (SYS_pgrpsys) | |
1334 | syscall_table[SYS_pgrpsys] = "pgrpsys"; | |
1335 | #endif | |
1336 | #if defined (SYS_xenix) | |
1337 | syscall_table[SYS_xenix] = "xenix"; | |
1338 | #endif | |
1339 | #if defined (SYS_dup) | |
1340 | syscall_table[SYS_dup] = "dup"; | |
1341 | #endif | |
1342 | #if defined (SYS_pipe) | |
1343 | syscall_table[SYS_pipe] = "pipe"; | |
1344 | #endif | |
1345 | #if defined (SYS_times) | |
1346 | syscall_table[SYS_times] = "times"; | |
1347 | #endif | |
1348 | #if defined (SYS_profil) | |
1349 | syscall_table[SYS_profil] = "profil"; | |
1350 | #endif | |
1351 | #if defined (SYS_plock) | |
1352 | syscall_table[SYS_plock] = "plock"; | |
1353 | #endif | |
1354 | #if defined (SYS_setgid) | |
1355 | syscall_table[SYS_setgid] = "setgid"; | |
1356 | #endif | |
1357 | #if defined (SYS_getgid) | |
1358 | syscall_table[SYS_getgid] = "getgid"; | |
1359 | #endif | |
1360 | #if defined (SYS_signal) | |
1361 | syscall_table[SYS_signal] = "signal"; | |
1362 | #endif | |
1363 | #if defined (SYS_msgsys) | |
1364 | syscall_table[SYS_msgsys] = "msgsys"; | |
1365 | #endif | |
1366 | #if defined (SYS_sys3b) | |
1367 | syscall_table[SYS_sys3b] = "sys3b"; | |
1368 | #endif | |
1369 | #if defined (SYS_sysi86) | |
1370 | syscall_table[SYS_sysi86] = "sysi86"; | |
1371 | #endif | |
1372 | #if defined (SYS_acct) | |
1373 | syscall_table[SYS_acct] = "acct"; | |
1374 | #endif | |
1375 | #if defined (SYS_shmsys) | |
1376 | syscall_table[SYS_shmsys] = "shmsys"; | |
1377 | #endif | |
1378 | #if defined (SYS_semsys) | |
1379 | syscall_table[SYS_semsys] = "semsys"; | |
1380 | #endif | |
1381 | #if defined (SYS_ioctl) | |
1382 | syscall_table[SYS_ioctl] = "ioctl"; | |
1383 | #endif | |
1384 | #if defined (SYS_uadmin) | |
1385 | syscall_table[SYS_uadmin] = "uadmin"; | |
1386 | #endif | |
1387 | #if defined (SYS_utssys) | |
1388 | syscall_table[SYS_utssys] = "utssys"; | |
1389 | #endif | |
1390 | #if defined (SYS_fsync) | |
1391 | syscall_table[SYS_fsync] = "fsync"; | |
1392 | #endif | |
1393 | #if defined (SYS_umask) | |
1394 | syscall_table[SYS_umask] = "umask"; | |
1395 | #endif | |
1396 | #if defined (SYS_chroot) | |
1397 | syscall_table[SYS_chroot] = "chroot"; | |
1398 | #endif | |
1399 | #if defined (SYS_fcntl) | |
1400 | syscall_table[SYS_fcntl] = "fcntl"; | |
1401 | #endif | |
1402 | #if defined (SYS_ulimit) | |
1403 | syscall_table[SYS_ulimit] = "ulimit"; | |
1404 | #endif | |
1405 | #if defined (SYS_rfsys) | |
1406 | syscall_table[SYS_rfsys] = "rfsys"; | |
1407 | #endif | |
1408 | #if defined (SYS_rmdir) | |
1409 | syscall_table[SYS_rmdir] = "rmdir"; | |
1410 | #endif | |
1411 | #if defined (SYS_mkdir) | |
1412 | syscall_table[SYS_mkdir] = "mkdir"; | |
1413 | #endif | |
1414 | #if defined (SYS_getdents) | |
1415 | syscall_table[SYS_getdents] = "getdents"; | |
1416 | #endif | |
1417 | #if defined (SYS_sysfs) | |
1418 | syscall_table[SYS_sysfs] = "sysfs"; | |
1419 | #endif | |
1420 | #if defined (SYS_getmsg) | |
1421 | syscall_table[SYS_getmsg] = "getmsg"; | |
1422 | #endif | |
1423 | #if defined (SYS_putmsg) | |
1424 | syscall_table[SYS_putmsg] = "putmsg"; | |
1425 | #endif | |
1426 | #if defined (SYS_poll) | |
1427 | syscall_table[SYS_poll] = "poll"; | |
1428 | #endif | |
1429 | #if defined (SYS_lstat) | |
1430 | syscall_table[SYS_lstat] = "lstat"; | |
1431 | #endif | |
1432 | #if defined (SYS_symlink) | |
1433 | syscall_table[SYS_symlink] = "symlink"; | |
1434 | #endif | |
1435 | #if defined (SYS_readlink) | |
1436 | syscall_table[SYS_readlink] = "readlink"; | |
1437 | #endif | |
1438 | #if defined (SYS_setgroups) | |
1439 | syscall_table[SYS_setgroups] = "setgroups"; | |
1440 | #endif | |
1441 | #if defined (SYS_getgroups) | |
1442 | syscall_table[SYS_getgroups] = "getgroups"; | |
1443 | #endif | |
1444 | #if defined (SYS_fchmod) | |
1445 | syscall_table[SYS_fchmod] = "fchmod"; | |
1446 | #endif | |
1447 | #if defined (SYS_fchown) | |
1448 | syscall_table[SYS_fchown] = "fchown"; | |
1449 | #endif | |
1450 | #if defined (SYS_sigprocmask) | |
1451 | syscall_table[SYS_sigprocmask] = "sigprocmask"; | |
1452 | #endif | |
1453 | #if defined (SYS_sigsuspend) | |
1454 | syscall_table[SYS_sigsuspend] = "sigsuspend"; | |
1455 | #endif | |
1456 | #if defined (SYS_sigaltstack) | |
1457 | syscall_table[SYS_sigaltstack] = "sigaltstack"; | |
1458 | #endif | |
1459 | #if defined (SYS_sigaction) | |
1460 | syscall_table[SYS_sigaction] = "sigaction"; | |
1461 | #endif | |
1462 | #if defined (SYS_sigpending) | |
1463 | syscall_table[SYS_sigpending] = "sigpending"; | |
1464 | #endif | |
1465 | #if defined (SYS_context) | |
1466 | syscall_table[SYS_context] = "context"; | |
1467 | #endif | |
1468 | #if defined (SYS_evsys) | |
1469 | syscall_table[SYS_evsys] = "evsys"; | |
1470 | #endif | |
1471 | #if defined (SYS_evtrapret) | |
1472 | syscall_table[SYS_evtrapret] = "evtrapret"; | |
1473 | #endif | |
1474 | #if defined (SYS_statvfs) | |
1475 | syscall_table[SYS_statvfs] = "statvfs"; | |
1476 | #endif | |
1477 | #if defined (SYS_fstatvfs) | |
1478 | syscall_table[SYS_fstatvfs] = "fstatvfs"; | |
1479 | #endif | |
1480 | #if defined (SYS_nfssys) | |
1481 | syscall_table[SYS_nfssys] = "nfssys"; | |
1482 | #endif | |
1483 | #if defined (SYS_waitsys) | |
1484 | syscall_table[SYS_waitsys] = "waitsys"; | |
1485 | #endif | |
1486 | #if defined (SYS_sigsendsys) | |
1487 | syscall_table[SYS_sigsendsys] = "sigsendsys"; | |
1488 | #endif | |
1489 | #if defined (SYS_hrtsys) | |
1490 | syscall_table[SYS_hrtsys] = "hrtsys"; | |
1491 | #endif | |
1492 | #if defined (SYS_acancel) | |
1493 | syscall_table[SYS_acancel] = "acancel"; | |
1494 | #endif | |
1495 | #if defined (SYS_async) | |
1496 | syscall_table[SYS_async] = "async"; | |
1497 | #endif | |
1498 | #if defined (SYS_priocntlsys) | |
1499 | syscall_table[SYS_priocntlsys] = "priocntlsys"; | |
1500 | #endif | |
1501 | #if defined (SYS_pathconf) | |
1502 | syscall_table[SYS_pathconf] = "pathconf"; | |
1503 | #endif | |
1504 | #if defined (SYS_mincore) | |
1505 | syscall_table[SYS_mincore] = "mincore"; | |
1506 | #endif | |
1507 | #if defined (SYS_mmap) | |
1508 | syscall_table[SYS_mmap] = "mmap"; | |
1509 | #endif | |
1510 | #if defined (SYS_mprotect) | |
1511 | syscall_table[SYS_mprotect] = "mprotect"; | |
1512 | #endif | |
1513 | #if defined (SYS_munmap) | |
1514 | syscall_table[SYS_munmap] = "munmap"; | |
1515 | #endif | |
1516 | #if defined (SYS_fpathconf) | |
1517 | syscall_table[SYS_fpathconf] = "fpathconf"; | |
1518 | #endif | |
1519 | #if defined (SYS_vfork) | |
1520 | syscall_table[SYS_vfork] = "vfork"; | |
1521 | #endif | |
1522 | #if defined (SYS_fchdir) | |
1523 | syscall_table[SYS_fchdir] = "fchdir"; | |
1524 | #endif | |
1525 | #if defined (SYS_readv) | |
1526 | syscall_table[SYS_readv] = "readv"; | |
1527 | #endif | |
1528 | #if defined (SYS_writev) | |
1529 | syscall_table[SYS_writev] = "writev"; | |
1530 | #endif | |
1531 | #if defined (SYS_xstat) | |
1532 | syscall_table[SYS_xstat] = "xstat"; | |
1533 | #endif | |
1534 | #if defined (SYS_lxstat) | |
1535 | syscall_table[SYS_lxstat] = "lxstat"; | |
1536 | #endif | |
1537 | #if defined (SYS_fxstat) | |
1538 | syscall_table[SYS_fxstat] = "fxstat"; | |
1539 | #endif | |
1540 | #if defined (SYS_xmknod) | |
1541 | syscall_table[SYS_xmknod] = "xmknod"; | |
1542 | #endif | |
1543 | #if defined (SYS_clocal) | |
1544 | syscall_table[SYS_clocal] = "clocal"; | |
1545 | #endif | |
1546 | #if defined (SYS_setrlimit) | |
1547 | syscall_table[SYS_setrlimit] = "setrlimit"; | |
1548 | #endif | |
1549 | #if defined (SYS_getrlimit) | |
1550 | syscall_table[SYS_getrlimit] = "getrlimit"; | |
1551 | #endif | |
1552 | #if defined (SYS_lchown) | |
1553 | syscall_table[SYS_lchown] = "lchown"; | |
1554 | #endif | |
1555 | #if defined (SYS_memcntl) | |
1556 | syscall_table[SYS_memcntl] = "memcntl"; | |
1557 | #endif | |
1558 | #if defined (SYS_getpmsg) | |
1559 | syscall_table[SYS_getpmsg] = "getpmsg"; | |
1560 | #endif | |
1561 | #if defined (SYS_putpmsg) | |
1562 | syscall_table[SYS_putpmsg] = "putpmsg"; | |
1563 | #endif | |
1564 | #if defined (SYS_rename) | |
1565 | syscall_table[SYS_rename] = "rename"; | |
1566 | #endif | |
1567 | #if defined (SYS_uname) | |
1568 | syscall_table[SYS_uname] = "uname"; | |
1569 | #endif | |
1570 | #if defined (SYS_setegid) | |
1571 | syscall_table[SYS_setegid] = "setegid"; | |
1572 | #endif | |
1573 | #if defined (SYS_sysconfig) | |
1574 | syscall_table[SYS_sysconfig] = "sysconfig"; | |
1575 | #endif | |
1576 | #if defined (SYS_adjtime) | |
1577 | syscall_table[SYS_adjtime] = "adjtime"; | |
1578 | #endif | |
1579 | #if defined (SYS_systeminfo) | |
1580 | syscall_table[SYS_systeminfo] = "systeminfo"; | |
1581 | #endif | |
1582 | #if defined (SYS_seteuid) | |
1583 | syscall_table[SYS_seteuid] = "seteuid"; | |
1584 | #endif | |
1585 | #if defined (SYS_sproc) | |
1586 | syscall_table[SYS_sproc] = "sproc"; | |
1587 | #endif | |
1588 | #if defined (SYS_keyctl) | |
1589 | syscall_table[SYS_keyctl] = "keyctl"; | |
1590 | #endif | |
1591 | #if defined (SYS_secsys) | |
1592 | syscall_table[SYS_secsys] = "secsys"; | |
1593 | #endif | |
1594 | #if defined (SYS_filepriv) | |
1595 | syscall_table[SYS_filepriv] = "filepriv"; | |
1596 | #endif | |
1597 | #if defined (SYS_procpriv) | |
1598 | syscall_table[SYS_procpriv] = "procpriv"; | |
1599 | #endif | |
1600 | #if defined (SYS_devstat) | |
1601 | syscall_table[SYS_devstat] = "devstat"; | |
1602 | #endif | |
1603 | #if defined (SYS_aclipc) | |
1604 | syscall_table[SYS_aclipc] = "aclipc"; | |
1605 | #endif | |
1606 | #if defined (SYS_fdevstat) | |
1607 | syscall_table[SYS_fdevstat] = "fdevstat"; | |
1608 | #endif | |
1609 | #if defined (SYS_flvlfile) | |
1610 | syscall_table[SYS_flvlfile] = "flvlfile"; | |
1611 | #endif | |
1612 | #if defined (SYS_lvlfile) | |
1613 | syscall_table[SYS_lvlfile] = "lvlfile"; | |
1614 | #endif | |
1615 | #if defined (SYS_lvlequal) | |
1616 | syscall_table[SYS_lvlequal] = "lvlequal"; | |
1617 | #endif | |
1618 | #if defined (SYS_lvlproc) | |
1619 | syscall_table[SYS_lvlproc] = "lvlproc"; | |
1620 | #endif | |
1621 | #if defined (SYS_lvlipc) | |
1622 | syscall_table[SYS_lvlipc] = "lvlipc"; | |
1623 | #endif | |
1624 | #if defined (SYS_acl) | |
1625 | syscall_table[SYS_acl] = "acl"; | |
1626 | #endif | |
1627 | #if defined (SYS_auditevt) | |
1628 | syscall_table[SYS_auditevt] = "auditevt"; | |
1629 | #endif | |
1630 | #if defined (SYS_auditctl) | |
1631 | syscall_table[SYS_auditctl] = "auditctl"; | |
1632 | #endif | |
1633 | #if defined (SYS_auditdmp) | |
1634 | syscall_table[SYS_auditdmp] = "auditdmp"; | |
1635 | #endif | |
1636 | #if defined (SYS_auditlog) | |
1637 | syscall_table[SYS_auditlog] = "auditlog"; | |
1638 | #endif | |
1639 | #if defined (SYS_auditbuf) | |
1640 | syscall_table[SYS_auditbuf] = "auditbuf"; | |
1641 | #endif | |
1642 | #if defined (SYS_lvldom) | |
1643 | syscall_table[SYS_lvldom] = "lvldom"; | |
1644 | #endif | |
1645 | #if defined (SYS_lvlvfs) | |
1646 | syscall_table[SYS_lvlvfs] = "lvlvfs"; | |
1647 | #endif | |
1648 | #if defined (SYS_mkmld) | |
1649 | syscall_table[SYS_mkmld] = "mkmld"; | |
1650 | #endif | |
1651 | #if defined (SYS_mldmode) | |
1652 | syscall_table[SYS_mldmode] = "mldmode"; | |
1653 | #endif | |
1654 | #if defined (SYS_secadvise) | |
1655 | syscall_table[SYS_secadvise] = "secadvise"; | |
1656 | #endif | |
1657 | #if defined (SYS_online) | |
1658 | syscall_table[SYS_online] = "online"; | |
1659 | #endif | |
1660 | #if defined (SYS_setitimer) | |
1661 | syscall_table[SYS_setitimer] = "setitimer"; | |
1662 | #endif | |
1663 | #if defined (SYS_getitimer) | |
1664 | syscall_table[SYS_getitimer] = "getitimer"; | |
1665 | #endif | |
1666 | #if defined (SYS_gettimeofday) | |
1667 | syscall_table[SYS_gettimeofday] = "gettimeofday"; | |
1668 | #endif | |
1669 | #if defined (SYS_settimeofday) | |
1670 | syscall_table[SYS_settimeofday] = "settimeofday"; | |
1671 | #endif | |
1672 | #if defined (SYS_lwp_create) | |
1673 | syscall_table[SYS_lwp_create] = "_lwp_create"; | |
1674 | #endif | |
1675 | #if defined (SYS_lwp_exit) | |
1676 | syscall_table[SYS_lwp_exit] = "_lwp_exit"; | |
1677 | #endif | |
1678 | #if defined (SYS_lwp_wait) | |
1679 | syscall_table[SYS_lwp_wait] = "_lwp_wait"; | |
1680 | #endif | |
1681 | #if defined (SYS_lwp_self) | |
1682 | syscall_table[SYS_lwp_self] = "_lwp_self"; | |
1683 | #endif | |
1684 | #if defined (SYS_lwp_info) | |
1685 | syscall_table[SYS_lwp_info] = "_lwp_info"; | |
1686 | #endif | |
1687 | #if defined (SYS_lwp_private) | |
1688 | syscall_table[SYS_lwp_private] = "_lwp_private"; | |
1689 | #endif | |
1690 | #if defined (SYS_processor_bind) | |
1691 | syscall_table[SYS_processor_bind] = "processor_bind"; | |
1692 | #endif | |
1693 | #if defined (SYS_processor_exbind) | |
1694 | syscall_table[SYS_processor_exbind] = "processor_exbind"; | |
1695 | #endif | |
1696 | #if defined (SYS_prepblock) | |
1697 | syscall_table[SYS_prepblock] = "prepblock"; | |
1698 | #endif | |
1699 | #if defined (SYS_block) | |
1700 | syscall_table[SYS_block] = "block"; | |
1701 | #endif | |
1702 | #if defined (SYS_rdblock) | |
1703 | syscall_table[SYS_rdblock] = "rdblock"; | |
1704 | #endif | |
1705 | #if defined (SYS_unblock) | |
1706 | syscall_table[SYS_unblock] = "unblock"; | |
1707 | #endif | |
1708 | #if defined (SYS_cancelblock) | |
1709 | syscall_table[SYS_cancelblock] = "cancelblock"; | |
1710 | #endif | |
1711 | #if defined (SYS_pread) | |
1712 | syscall_table[SYS_pread] = "pread"; | |
1713 | #endif | |
1714 | #if defined (SYS_pwrite) | |
1715 | syscall_table[SYS_pwrite] = "pwrite"; | |
1716 | #endif | |
1717 | #if defined (SYS_truncate) | |
1718 | syscall_table[SYS_truncate] = "truncate"; | |
1719 | #endif | |
1720 | #if defined (SYS_ftruncate) | |
1721 | syscall_table[SYS_ftruncate] = "ftruncate"; | |
1722 | #endif | |
1723 | #if defined (SYS_lwp_kill) | |
1724 | syscall_table[SYS_lwp_kill] = "_lwp_kill"; | |
1725 | #endif | |
1726 | #if defined (SYS_sigwait) | |
1727 | syscall_table[SYS_sigwait] = "sigwait"; | |
1728 | #endif | |
1729 | #if defined (SYS_fork1) | |
1730 | syscall_table[SYS_fork1] = "fork1"; | |
1731 | #endif | |
1732 | #if defined (SYS_forkall) | |
1733 | syscall_table[SYS_forkall] = "forkall"; | |
1734 | #endif | |
1735 | #if defined (SYS_modload) | |
1736 | syscall_table[SYS_modload] = "modload"; | |
1737 | #endif | |
1738 | #if defined (SYS_moduload) | |
1739 | syscall_table[SYS_moduload] = "moduload"; | |
1740 | #endif | |
1741 | #if defined (SYS_modpath) | |
1742 | syscall_table[SYS_modpath] = "modpath"; | |
1743 | #endif | |
1744 | #if defined (SYS_modstat) | |
1745 | syscall_table[SYS_modstat] = "modstat"; | |
1746 | #endif | |
1747 | #if defined (SYS_modadm) | |
1748 | syscall_table[SYS_modadm] = "modadm"; | |
1749 | #endif | |
1750 | #if defined (SYS_getksym) | |
1751 | syscall_table[SYS_getksym] = "getksym"; | |
1752 | #endif | |
1753 | #if defined (SYS_lwp_suspend) | |
1754 | syscall_table[SYS_lwp_suspend] = "_lwp_suspend"; | |
1755 | #endif | |
1756 | #if defined (SYS_lwp_continue) | |
1757 | syscall_table[SYS_lwp_continue] = "_lwp_continue"; | |
1758 | #endif | |
1759 | #if defined (SYS_priocntllst) | |
1760 | syscall_table[SYS_priocntllst] = "priocntllst"; | |
1761 | #endif | |
1762 | #if defined (SYS_sleep) | |
1763 | syscall_table[SYS_sleep] = "sleep"; | |
1764 | #endif | |
1765 | #if defined (SYS_lwp_sema_wait) | |
1766 | syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait"; | |
1767 | #endif | |
1768 | #if defined (SYS_lwp_sema_post) | |
1769 | syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post"; | |
1770 | #endif | |
1771 | #if defined (SYS_lwp_sema_trywait) | |
1772 | syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait"; | |
1773 | #endif | |
1774 | #if defined(SYS_fstatvfs64) | |
1775 | syscall_table[SYS_fstatvfs64] = "fstatvfs64"; | |
1776 | #endif | |
1777 | #if defined(SYS_statvfs64) | |
1778 | syscall_table[SYS_statvfs64] = "statvfs64"; | |
1779 | #endif | |
1780 | #if defined(SYS_ftruncate64) | |
1781 | syscall_table[SYS_ftruncate64] = "ftruncate64"; | |
1782 | #endif | |
1783 | #if defined(SYS_truncate64) | |
1784 | syscall_table[SYS_truncate64] = "truncate64"; | |
1785 | #endif | |
1786 | #if defined(SYS_getrlimit64) | |
1787 | syscall_table[SYS_getrlimit64] = "getrlimit64"; | |
1788 | #endif | |
1789 | #if defined(SYS_setrlimit64) | |
1790 | syscall_table[SYS_setrlimit64] = "setrlimit64"; | |
1791 | #endif | |
1792 | #if defined(SYS_lseek64) | |
1793 | syscall_table[SYS_lseek64] = "lseek64"; | |
1794 | #endif | |
1795 | #if defined(SYS_mmap64) | |
1796 | syscall_table[SYS_mmap64] = "mmap64"; | |
1797 | #endif | |
1798 | #if defined(SYS_pread64) | |
1799 | syscall_table[SYS_pread64] = "pread64"; | |
1800 | #endif | |
1801 | #if defined(SYS_creat64) | |
1802 | syscall_table[SYS_creat64] = "creat64"; | |
1803 | #endif | |
1804 | #if defined(SYS_dshmsys) | |
1805 | syscall_table[SYS_dshmsys] = "dshmsys"; | |
1806 | #endif | |
1807 | #if defined(SYS_invlpg) | |
1808 | syscall_table[SYS_invlpg] = "invlpg"; | |
1809 | #endif | |
1810 | #if defined(SYS_cg_ids) | |
1811 | syscall_table[SYS_cg_ids] = "cg_ids"; | |
1812 | #endif | |
1813 | #if defined(SYS_cg_processors) | |
1814 | syscall_table[SYS_cg_processors] = "cg_processors"; | |
1815 | #endif | |
1816 | #if defined(SYS_cg_info) | |
1817 | syscall_table[SYS_cg_info] = "cg_info"; | |
1818 | #endif | |
1819 | #if defined(SYS_cg_bind) | |
1820 | syscall_table[SYS_cg_bind] = "cg_bind"; | |
1821 | #endif | |
1822 | #if defined(SYS_cg_current) | |
1823 | syscall_table[SYS_cg_current] = "cg_current"; | |
1824 | #endif | |
1825 | #if defined(SYS_cg_memloc) | |
1826 | syscall_table[SYS_cg_memloc] = "cg_memloc"; | |
1827 | #endif | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | ||
1832 | LOCAL FUNCTION | |
1833 | ||
1834 | procfs_kill_inferior - kill any currently inferior | |
1835 | ||
1836 | SYNOPSIS | |
1837 | ||
1838 | void procfs_kill_inferior (void) | |
1839 | ||
1840 | DESCRIPTION | |
1841 | ||
1842 | Kill any current inferior. | |
1843 | ||
1844 | NOTES | |
1845 | ||
1846 | Kills even attached inferiors. Presumably the user has already | |
1847 | been prompted that the inferior is an attached one rather than | |
1848 | one started by gdb. (FIXME?) | |
1849 | ||
1850 | */ | |
1851 | ||
1852 | static void | |
1853 | procfs_kill_inferior () | |
1854 | { | |
1855 | target_mourn_inferior (); | |
1856 | } | |
1857 | ||
1858 | /* | |
1859 | ||
1860 | LOCAL FUNCTION | |
1861 | ||
1862 | unconditionally_kill_inferior - terminate the inferior | |
1863 | ||
1864 | SYNOPSIS | |
1865 | ||
1866 | static void unconditionally_kill_inferior (struct procinfo *) | |
1867 | ||
1868 | DESCRIPTION | |
1869 | ||
1870 | Kill the specified inferior. | |
1871 | ||
1872 | NOTE | |
1873 | ||
1874 | A possibly useful enhancement would be to first try sending | |
1875 | the inferior a terminate signal, politely asking it to commit | |
1876 | suicide, before we murder it (we could call that | |
1877 | politely_kill_inferior()). | |
1878 | ||
1879 | */ | |
1880 | ||
1881 | static void | |
1882 | unconditionally_kill_inferior (pi) | |
1883 | struct procinfo *pi; | |
1884 | { | |
1885 | int ppid; | |
1886 | struct proc_ctl pctl; | |
1887 | ||
1888 | ppid = pi->prstatus.pr_ppid; | |
1889 | ||
1890 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
1891 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
1892 | before the PIOCKILL, otherwise it might generate a corrupted core | |
1893 | file for the inferior. */ | |
1894 | ioctl (pi->ctl_fd, PIOCSSIG, NULL); | |
1895 | #endif | |
1896 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
1897 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
1898 | to kill the inferior, otherwise it might remain stopped with a | |
1899 | pending SIGKILL. | |
1900 | We do not check the result of the PIOCSSIG, the inferior might have | |
1901 | died already. */ | |
1902 | { | |
1903 | struct siginfo newsiginfo; | |
1904 | ||
1905 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); | |
1906 | newsiginfo.si_signo = SIGKILL; | |
1907 | newsiginfo.si_code = 0; | |
1908 | newsiginfo.si_errno = 0; | |
1909 | newsiginfo.si_pid = getpid (); | |
1910 | newsiginfo.si_uid = getuid (); | |
1911 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
1912 | } | |
1913 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
1914 | procfs_write_pckill (pi); | |
1915 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
1916 | ||
1917 | close_proc_file (pi); | |
1918 | ||
1919 | /* Only wait() for our direct children. Our grandchildren zombies are killed | |
1920 | by the death of their parents. */ | |
1921 | ||
1922 | if (ppid == getpid()) | |
1923 | wait ((int *) 0); | |
1924 | } | |
1925 | ||
1926 | /* | |
1927 | ||
1928 | LOCAL FUNCTION | |
1929 | ||
1930 | procfs_xfer_memory -- copy data to or from inferior memory space | |
1931 | ||
1932 | SYNOPSIS | |
1933 | ||
1934 | int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, | |
1935 | int dowrite, struct target_ops target) | |
1936 | ||
1937 | DESCRIPTION | |
1938 | ||
1939 | Copy LEN bytes to/from inferior's memory starting at MEMADDR | |
1940 | from/to debugger memory starting at MYADDR. Copy from inferior | |
1941 | if DOWRITE is zero or to inferior if DOWRITE is nonzero. | |
1942 | ||
1943 | Returns the length copied, which is either the LEN argument or | |
1944 | zero. This xfer function does not do partial moves, since procfs_ops | |
1945 | doesn't allow memory operations to cross below us in the target stack | |
1946 | anyway. | |
1947 | ||
1948 | NOTES | |
1949 | ||
1950 | The /proc interface makes this an almost trivial task. | |
1951 | */ | |
1952 | ||
1953 | static int | |
1954 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) | |
1955 | CORE_ADDR memaddr; | |
1956 | char *myaddr; | |
1957 | int len; | |
1958 | int dowrite; | |
1959 | struct target_ops *target; /* ignored */ | |
1960 | { | |
1961 | int nbytes = 0; | |
1962 | struct procinfo *pi; | |
1963 | ||
1964 | pi = current_procinfo; | |
1965 | ||
1966 | if (lseek(pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) | |
1967 | { | |
1968 | if (dowrite) | |
1969 | { | |
1970 | nbytes = write (pi->as_fd, myaddr, len); | |
1971 | } | |
1972 | else | |
1973 | { | |
1974 | nbytes = read (pi->as_fd, myaddr, len); | |
1975 | } | |
1976 | if (nbytes < 0) | |
1977 | { | |
1978 | nbytes = 0; | |
1979 | } | |
1980 | } | |
1981 | return (nbytes); | |
1982 | } | |
1983 | ||
1984 | /* | |
1985 | ||
1986 | LOCAL FUNCTION | |
1987 | ||
1988 | procfs_store_registers -- copy register values back to inferior | |
1989 | ||
1990 | SYNOPSIS | |
1991 | ||
1992 | void procfs_store_registers (int regno) | |
1993 | ||
1994 | DESCRIPTION | |
1995 | ||
1996 | Store our current register values back into the inferior. If | |
1997 | REGNO is -1 then store all the register, otherwise store just | |
1998 | the value specified by REGNO. | |
1999 | ||
2000 | NOTES | |
2001 | ||
2002 | If we are storing only a single register, we first have to get all | |
2003 | the current values from the process, overwrite the desired register | |
2004 | in the gregset with the one we want from gdb's registers, and then | |
2005 | send the whole set back to the process. For writing all the | |
2006 | registers, all we have to do is generate the gregset and send it to | |
2007 | the process. | |
2008 | ||
2009 | Also note that the process has to be stopped on an event of interest | |
2010 | for this to work, which basically means that it has to have been | |
2011 | run under the control of one of the other /proc ioctl calls and not | |
2012 | ptrace. Since we don't use ptrace anyway, we don't worry about this | |
2013 | fine point, but it is worth noting for future reference. | |
2014 | ||
2015 | Gdb is confused about what this function is supposed to return. | |
2016 | Some versions return a value, others return nothing. Some are | |
2017 | declared to return a value and actually return nothing. Gdb ignores | |
2018 | anything returned. (FIXME) | |
2019 | ||
2020 | */ | |
2021 | ||
2022 | static void | |
2023 | procfs_store_registers (regno) | |
2024 | int regno; | |
2025 | { | |
2026 | struct procinfo *pi; | |
2027 | #ifdef PROCFS_USE_READ_WRITE | |
2028 | struct greg_ctl greg; | |
2029 | struct fpreg_ctl fpreg; | |
2030 | #endif | |
2031 | ||
2032 | pi = current_procinfo; | |
2033 | ||
2034 | #ifdef PROCFS_USE_READ_WRITE | |
2035 | if (regno != -1) | |
2036 | { | |
2037 | procfs_read_status (pi); | |
2038 | memcpy ((char *) &greg.gregset, | |
2039 | (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs, | |
2040 | sizeof (gdb_gregset_t)); | |
2041 | } | |
2042 | fill_gregset (&greg.gregset, regno); | |
2043 | greg.cmd = PCSREG; | |
2044 | write (pi->ctl_fd, &greg, sizeof (greg)); | |
2045 | #else /* PROCFS_USE_READ_WRITE */ | |
2046 | if (regno != -1) | |
2047 | { | |
2048 | ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset); | |
2049 | } | |
2050 | fill_gregset (&pi->gregset.gregset, regno); | |
2051 | ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset); | |
2052 | #endif /* PROCFS_USE_READ_WRITE */ | |
2053 | ||
2054 | #if defined (FP0_REGNUM) | |
2055 | ||
2056 | /* Now repeat everything using the floating point register set, if the | |
2057 | target has floating point hardware. Since we ignore the returned value, | |
2058 | we'll never know whether it worked or not anyway. */ | |
2059 | ||
2060 | #ifdef PROCFS_USE_READ_WRITE | |
2061 | if (regno != -1) | |
2062 | { | |
2063 | procfs_read_status (pi); | |
2064 | memcpy ((char *) &fpreg.fpregset, | |
2065 | (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs, | |
2066 | sizeof (gdb_fpregset_t)); | |
2067 | } | |
2068 | fill_fpregset (&fpreg.fpregset, regno); | |
2069 | fpreg.cmd = PCSFPREG; | |
2070 | write (pi->ctl_fd, &fpreg, sizeof (fpreg)); | |
2071 | #else /* PROCFS_USE_READ_WRITE */ | |
2072 | if (regno != -1) | |
2073 | { | |
2074 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset); | |
2075 | } | |
2076 | fill_fpregset (&pi->fpregset.fpregset, regno); | |
2077 | ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset); | |
2078 | #endif /* PROCFS_USE_READ_WRITE */ | |
2079 | ||
2080 | #endif /* FP0_REGNUM */ | |
2081 | ||
2082 | } | |
2083 | ||
2084 | /* | |
2085 | ||
2086 | LOCAL FUNCTION | |
2087 | ||
2088 | init_procinfo - setup a procinfo struct and connect it to a process | |
2089 | ||
2090 | SYNOPSIS | |
2091 | ||
2092 | struct procinfo * init_procinfo (int pid) | |
2093 | ||
2094 | DESCRIPTION | |
2095 | ||
2096 | Allocate a procinfo structure, open the /proc file and then set up the | |
2097 | set of signals and faults that are to be traced. Returns a pointer to | |
2098 | the new procinfo structure. | |
2099 | ||
2100 | NOTES | |
2101 | ||
2102 | If proc_init_failed ever gets called, control returns to the command | |
2103 | processing loop via the standard error handling code. | |
2104 | ||
2105 | */ | |
2106 | ||
2107 | static struct procinfo * | |
2108 | init_procinfo (pid, kill) | |
2109 | int pid; | |
2110 | int kill; | |
2111 | { | |
2112 | struct procinfo *pi = (struct procinfo *) | |
2113 | xmalloc (sizeof (struct procinfo)); | |
2114 | struct sig_ctl sctl; | |
2115 | struct flt_ctl fctl; | |
2116 | ||
2117 | memset ((char *) pi, 0, sizeof (*pi)); | |
2118 | if (!open_proc_file (pid, pi, O_RDWR, 1)) | |
2119 | proc_init_failed (pi, "can't open process file", kill); | |
2120 | ||
2121 | /* open_proc_file may modify pid. */ | |
2122 | ||
2123 | pid = pi -> pid; | |
2124 | ||
2125 | /* Add new process to process info list */ | |
2126 | ||
2127 | pi->next = procinfo_list; | |
2128 | procinfo_list = pi; | |
2129 | ||
2130 | add_fd (pi); /* Add to list for poll/select */ | |
2131 | ||
2132 | /* Remember some things about the inferior that we will, or might, change | |
2133 | so that we can restore them when we detach. */ | |
2134 | #ifdef UNIXWARE | |
2135 | memcpy ((char *) &pi->saved_trace.sigset, | |
2136 | (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t)); | |
2137 | memcpy ((char *) &pi->saved_fltset.fltset, | |
2138 | (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t)); | |
2139 | memcpy ((char *) &pi->saved_entryset.sysset, | |
2140 | (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t)); | |
2141 | memcpy ((char *) &pi->saved_exitset.sysset, | |
2142 | (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t)); | |
2143 | ||
2144 | /* Set up trace and fault sets, as gdb expects them. */ | |
2145 | ||
2146 | prfillset (&sctl.sigset); | |
2147 | notice_signals (pi, &sctl); | |
2148 | prfillset (&fctl.fltset); | |
2149 | prdelset (&fctl.fltset, FLTPAGE); | |
2150 | ||
2151 | #else /* ! UNIXWARE */ | |
2152 | ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset); | |
2153 | ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset); | |
2154 | ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset); | |
2155 | ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset); | |
2156 | ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset); | |
2157 | ||
2158 | /* Set up trace and fault sets, as gdb expects them. */ | |
2159 | ||
2160 | memset ((char *) &pi->prrun, 0, sizeof (pi->prrun)); | |
2161 | prfillset (&pi->prrun.pr_trace); | |
2162 | procfs_notice_signals (pid); | |
2163 | prfillset (&pi->prrun.pr_fault); | |
2164 | prdelset (&pi->prrun.pr_fault, FLTPAGE); | |
2165 | #ifdef PROCFS_DONT_TRACE_FAULTS | |
2166 | premptyset (&pi->prrun.pr_fault); | |
2167 | #endif | |
2168 | #endif /* UNIXWARE */ | |
2169 | ||
2170 | if (!procfs_read_status (pi)) | |
2171 | proc_init_failed (pi, "procfs_read_status failed", kill); | |
2172 | ||
2173 | return pi; | |
2174 | } | |
2175 | ||
2176 | /* | |
2177 | ||
2178 | LOCAL FUNCTION | |
2179 | ||
2180 | create_procinfo - initialize access to a /proc entry | |
2181 | ||
2182 | SYNOPSIS | |
2183 | ||
2184 | struct procinfo * create_procinfo (int pid) | |
2185 | ||
2186 | DESCRIPTION | |
2187 | ||
2188 | Allocate a procinfo structure, open the /proc file and then set up the | |
2189 | set of signals and faults that are to be traced. Returns a pointer to | |
2190 | the new procinfo structure. | |
2191 | ||
2192 | NOTES | |
2193 | ||
2194 | If proc_init_failed ever gets called, control returns to the command | |
2195 | processing loop via the standard error handling code. | |
2196 | ||
2197 | */ | |
2198 | ||
2199 | static struct procinfo * | |
2200 | create_procinfo (pid) | |
2201 | int pid; | |
2202 | { | |
2203 | struct procinfo *pi; | |
2204 | struct sig_ctl sctl; | |
2205 | struct flt_ctl fctl; | |
2206 | ||
2207 | pi = find_procinfo (pid, 1); | |
2208 | if (pi != NULL) | |
2209 | return pi; /* All done! It already exists */ | |
2210 | ||
2211 | pi = init_procinfo (pid, 1); | |
2212 | ||
2213 | #ifndef UNIXWARE | |
2214 | /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are | |
2215 | already stopped, even if they all have PR_ASYNC set. */ | |
2216 | if (!(pi->prstatus.pr_flags & PR_STOPPED)) | |
2217 | #endif | |
2218 | if (!procfs_write_pcwstop (pi)) | |
2219 | proc_init_failed (pi, "procfs_write_pcwstop failed", 1); | |
2220 | ||
2221 | #ifdef PROCFS_USE_READ_WRITE | |
2222 | fctl.cmd = PCSFAULT; | |
2223 | if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0) | |
2224 | proc_init_failed (pi, "PCSFAULT failed", 1); | |
2225 | #else | |
2226 | if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0) | |
2227 | proc_init_failed (pi, "PIOCSFAULT failed", 1); | |
2228 | #endif | |
2229 | ||
2230 | return pi; | |
2231 | } | |
2232 | ||
2233 | /* | |
2234 | ||
2235 | LOCAL FUNCTION | |
2236 | ||
2237 | procfs_exit_handler - handle entry into the _exit syscall | |
2238 | ||
2239 | SYNOPSIS | |
2240 | ||
2241 | int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
2242 | ||
2243 | DESCRIPTION | |
2244 | ||
2245 | This routine is called when an inferior process enters the _exit() | |
2246 | system call. It continues the process, and then collects the exit | |
2247 | status and pid which are returned in *statvalp and *rtnvalp. After | |
2248 | that it returns non-zero to indicate that procfs_wait should wake up. | |
2249 | ||
2250 | NOTES | |
2251 | There is probably a better way to do this. | |
2252 | ||
2253 | */ | |
2254 | ||
2255 | static int | |
2256 | procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
2257 | struct procinfo *pi; | |
2258 | int syscall_num; | |
2259 | int why; | |
2260 | int *rtnvalp; | |
2261 | int *statvalp; | |
2262 | { | |
2263 | struct procinfo *temp_pi, *next_pi; | |
2264 | struct proc_ctl pctl; | |
2265 | ||
2266 | #ifdef UNIXWARE | |
2267 | pctl.cmd = PCRUN; | |
2268 | pctl.data = PRCFAULT; | |
2269 | #else | |
2270 | pi->prrun.pr_flags = PRCFAULT; | |
2271 | #endif | |
2272 | ||
2273 | #ifdef PROCFS_USE_READ_WRITE | |
2274 | if (write (pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0) | |
2275 | #else | |
2276 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) | |
2277 | #endif | |
2278 | perror_with_name (pi->pathname); | |
2279 | ||
2280 | if (attach_flag) | |
2281 | { | |
2282 | /* Claim it exited (don't call wait). */ | |
2283 | if (info_verbose) | |
2284 | printf_filtered ("(attached process has exited)\n"); | |
2285 | *statvalp = 0; | |
2286 | *rtnvalp = inferior_pid; | |
2287 | } | |
2288 | else | |
2289 | { | |
2290 | *rtnvalp = wait (statvalp); | |
2291 | if (*rtnvalp >= 0) | |
2292 | *rtnvalp = pi->pid; | |
2293 | } | |
2294 | ||
2295 | /* Close ALL open proc file handles, | |
2296 | except the one that called SYS_exit. */ | |
2297 | for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi) | |
2298 | { | |
2299 | next_pi = temp_pi->next; | |
2300 | if (temp_pi == pi) | |
2301 | continue; /* Handled below */ | |
2302 | close_proc_file (temp_pi); | |
2303 | } | |
2304 | return 1; | |
2305 | } | |
2306 | ||
2307 | /* | |
2308 | ||
2309 | LOCAL FUNCTION | |
2310 | ||
2311 | procfs_exec_handler - handle exit from the exec family of syscalls | |
2312 | ||
2313 | SYNOPSIS | |
2314 | ||
2315 | int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
2316 | ||
2317 | DESCRIPTION | |
2318 | ||
2319 | This routine is called when an inferior process is about to finish any | |
2320 | of the exec() family of system calls. It pretends that we got a | |
2321 | SIGTRAP (for compatibility with ptrace behavior), and returns non-zero | |
2322 | to tell procfs_wait to wake up. | |
2323 | ||
2324 | NOTES | |
2325 | This need for compatibility with ptrace is questionable. In the | |
2326 | future, it shouldn't be necessary. | |
2327 | ||
2328 | */ | |
2329 | ||
2330 | static int | |
2331 | procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
2332 | struct procinfo *pi; | |
2333 | int syscall_num; | |
2334 | int why; | |
2335 | int *rtnvalp; | |
2336 | int *statvalp; | |
2337 | { | |
2338 | *statvalp = (SIGTRAP << 8) | 0177; | |
2339 | ||
2340 | return 1; | |
2341 | } | |
2342 | ||
2343 | #if defined(SYS_sproc) && !defined(UNIXWARE) | |
2344 | /* IRIX lwp creation system call */ | |
2345 | ||
2346 | /* | |
2347 | ||
2348 | LOCAL FUNCTION | |
2349 | ||
2350 | procfs_sproc_handler - handle exit from the sproc syscall | |
2351 | ||
2352 | SYNOPSIS | |
2353 | ||
2354 | int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
2355 | ||
2356 | DESCRIPTION | |
2357 | ||
2358 | This routine is called when an inferior process is about to finish an | |
2359 | sproc() system call. This is the system call that IRIX uses to create | |
2360 | a lightweight process. When the target process gets this event, we can | |
2361 | look at rval1 to find the new child processes ID, and create a new | |
2362 | procinfo struct from that. | |
2363 | ||
2364 | After that, it pretends that we got a SIGTRAP, and returns non-zero | |
2365 | to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets | |
2366 | woken up, sees the new process and continues it. | |
2367 | ||
2368 | NOTES | |
2369 | We actually never see the child exiting from sproc because we will | |
2370 | shortly stop the child with PIOCSTOP, which is then registered as the | |
2371 | event of interest. | |
2372 | */ | |
2373 | ||
2374 | static int | |
2375 | procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
2376 | struct procinfo *pi; | |
2377 | int syscall_num; | |
2378 | int why; | |
2379 | int *rtnvalp; | |
2380 | int *statvalp; | |
2381 | { | |
2382 | /* We've just detected the completion of an sproc system call. Now we need to | |
2383 | setup a procinfo struct for this thread, and notify the thread system of the | |
2384 | new arrival. */ | |
2385 | ||
2386 | /* If sproc failed, then nothing interesting happened. Continue the process | |
2387 | and go back to sleep. */ | |
2388 | ||
2389 | if (pi->prstatus.pr_errno != 0) | |
2390 | { | |
2391 | pi->prrun.pr_flags &= PRSTEP; | |
2392 | pi->prrun.pr_flags |= PRCFAULT; | |
2393 | ||
2394 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) | |
2395 | perror_with_name (pi->pathname); | |
2396 | ||
2397 | return 0; | |
2398 | } | |
2399 | ||
2400 | /* At this point, the new thread is stopped at it's first instruction, and | |
2401 | the parent is stopped at the exit from sproc. */ | |
2402 | ||
2403 | /* Notify the caller of the arrival of a new thread. */ | |
2404 | create_procinfo (pi->prstatus.pr_rval1); | |
2405 | ||
2406 | *rtnvalp = pi->prstatus.pr_rval1; | |
2407 | *statvalp = (SIGTRAP << 8) | 0177; | |
2408 | ||
2409 | return 1; | |
2410 | } | |
2411 | ||
2412 | /* | |
2413 | ||
2414 | LOCAL FUNCTION | |
2415 | ||
2416 | procfs_fork_handler - handle exit from the fork syscall | |
2417 | ||
2418 | SYNOPSIS | |
2419 | ||
2420 | int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
2421 | ||
2422 | DESCRIPTION | |
2423 | ||
2424 | This routine is called when an inferior process is about to finish a | |
2425 | fork() system call. We will open up the new process, and then close | |
2426 | it, which releases it from the clutches of the debugger. | |
2427 | ||
2428 | After that, we continue the target process as though nothing had | |
2429 | happened. | |
2430 | ||
2431 | NOTES | |
2432 | This is necessary for IRIX because we have to set PR_FORK in order | |
2433 | to catch the creation of lwps (via sproc()). When an actual fork | |
2434 | occurs, it becomes necessary to reset the forks debugger flags and | |
2435 | continue it because we can't hack multiple processes yet. | |
2436 | */ | |
2437 | ||
2438 | static int | |
2439 | procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
2440 | struct procinfo *pi; | |
2441 | int syscall_num; | |
2442 | int why; | |
2443 | int *rtnvalp; | |
2444 | int *statvalp; | |
2445 | { | |
2446 | struct procinfo *pitemp; | |
2447 | ||
2448 | /* At this point, we've detected the completion of a fork (or vfork) call in | |
2449 | our child. The grandchild is also stopped because we set inherit-on-fork | |
2450 | earlier. (Note that nobody has the grandchilds' /proc file open at this | |
2451 | point.) We will release the grandchild from the debugger by opening it's | |
2452 | /proc file and then closing it. Since run-on-last-close is set, the | |
2453 | grandchild continues on its' merry way. */ | |
2454 | ||
2455 | ||
2456 | pitemp = create_procinfo (pi->prstatus.pr_rval1); | |
2457 | if (pitemp) | |
2458 | close_proc_file (pitemp); | |
2459 | ||
2460 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) | |
2461 | perror_with_name (pi->pathname); | |
2462 | ||
2463 | return 0; | |
2464 | } | |
2465 | #endif /* SYS_sproc && !UNIXWARE */ | |
2466 | ||
2467 | /* | |
2468 | ||
2469 | LOCAL FUNCTION | |
2470 | ||
2471 | procfs_set_inferior_syscall_traps - setup the syscall traps | |
2472 | ||
2473 | SYNOPSIS | |
2474 | ||
2475 | void procfs_set_inferior_syscall_traps (struct procinfo *pip) | |
2476 | ||
2477 | DESCRIPTION | |
2478 | ||
2479 | Called for each "procinfo" (process, thread, or LWP) in the | |
2480 | inferior, to register for notification of and handlers for | |
2481 | syscall traps in the inferior. | |
2482 | ||
2483 | */ | |
2484 | ||
2485 | static void | |
2486 | procfs_set_inferior_syscall_traps (pip) | |
2487 | struct procinfo *pip; | |
2488 | { | |
2489 | procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY, | |
2490 | procfs_exit_handler); | |
2491 | ||
2492 | #ifndef PRFS_STOPEXEC | |
2493 | #ifdef SYS_exec | |
2494 | procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT, | |
2495 | procfs_exec_handler); | |
2496 | #endif | |
2497 | #ifdef SYS_execv | |
2498 | procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT, | |
2499 | procfs_exec_handler); | |
2500 | #endif | |
2501 | #ifdef SYS_execve | |
2502 | procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT, | |
2503 | procfs_exec_handler); | |
2504 | #endif | |
2505 | #endif /* PRFS_STOPEXEC */ | |
2506 | ||
2507 | /* Setup traps on exit from sproc() */ | |
2508 | ||
2509 | #ifdef SYS_sproc | |
2510 | procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT, | |
2511 | procfs_sproc_handler); | |
2512 | procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT, | |
2513 | procfs_fork_handler); | |
2514 | #ifdef SYS_vfork | |
2515 | procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT, | |
2516 | procfs_fork_handler); | |
2517 | #endif | |
2518 | /* Turn on inherit-on-fork flag so that all children of the target process | |
2519 | start with tracing flags set. This allows us to trap lwp creation. Note | |
2520 | that we also have to trap on fork and vfork in order to disable all tracing | |
2521 | in the targets child processes. */ | |
2522 | ||
2523 | modify_inherit_on_fork_flag (pip->ctl_fd, 1); | |
2524 | #endif | |
2525 | ||
2526 | #ifdef SYS_lwp_create | |
2527 | procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT, | |
2528 | procfs_lwp_creation_handler); | |
2529 | #endif | |
2530 | } | |
2531 | ||
2532 | /* | |
2533 | ||
2534 | LOCAL FUNCTION | |
2535 | ||
2536 | procfs_init_inferior - initialize target vector and access to a | |
2537 | /proc entry | |
2538 | ||
2539 | SYNOPSIS | |
2540 | ||
2541 | void procfs_init_inferior (int pid) | |
2542 | ||
2543 | DESCRIPTION | |
2544 | ||
2545 | When gdb starts an inferior, this function is called in the parent | |
2546 | process immediately after the fork. It waits for the child to stop | |
2547 | on the return from the exec system call (the child itself takes care | |
2548 | of ensuring that this is set up), then sets up the set of signals | |
2549 | and faults that are to be traced. Returns the pid, which may have had | |
2550 | the thread-id added to it. | |
2551 | ||
2552 | NOTES | |
2553 | ||
2554 | If proc_init_failed ever gets called, control returns to the command | |
2555 | processing loop via the standard error handling code. | |
2556 | ||
2557 | */ | |
2558 | ||
2559 | static void | |
2560 | procfs_init_inferior (pid) | |
2561 | int pid; | |
2562 | { | |
2563 | struct procinfo *pip; | |
2564 | ||
2565 | push_target (&procfs_ops); | |
2566 | ||
2567 | pip = create_procinfo (pid); | |
2568 | ||
2569 | procfs_set_inferior_syscall_traps (pip); | |
2570 | ||
2571 | /* create_procinfo may change the pid, so we have to update inferior_pid | |
2572 | here before calling other gdb routines that need the right pid. */ | |
2573 | ||
2574 | pid = pip -> pid; | |
2575 | inferior_pid = pid; | |
2576 | ||
2577 | add_thread (pip -> pid); /* Setup initial thread */ | |
2578 | ||
2579 | #ifdef START_INFERIOR_TRAPS_EXPECTED | |
2580 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
2581 | #else | |
2582 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
2583 | startup_inferior (2); | |
2584 | #endif | |
2585 | } | |
2586 | ||
2587 | /* | |
2588 | ||
2589 | GLOBAL FUNCTION | |
2590 | ||
2591 | procfs_notice_signals | |
2592 | ||
2593 | SYNOPSIS | |
2594 | ||
2595 | static void procfs_notice_signals (int pid); | |
2596 | ||
2597 | DESCRIPTION | |
2598 | ||
2599 | When the user changes the state of gdb's signal handling via the | |
2600 | "handle" command, this function gets called to see if any change | |
2601 | in the /proc interface is required. It is also called internally | |
2602 | by other /proc interface functions to initialize the state of | |
2603 | the traced signal set. | |
2604 | ||
2605 | One thing it does is that signals for which the state is "nostop", | |
2606 | "noprint", and "pass", have their trace bits reset in the pr_trace | |
2607 | field, so that they are no longer traced. This allows them to be | |
2608 | delivered directly to the inferior without the debugger ever being | |
2609 | involved. | |
2610 | */ | |
2611 | ||
2612 | static void | |
2613 | procfs_notice_signals (pid) | |
2614 | int pid; | |
2615 | { | |
2616 | struct procinfo *pi; | |
2617 | struct sig_ctl sctl; | |
2618 | ||
2619 | pi = find_procinfo (pid, 0); | |
2620 | ||
2621 | #ifndef HAVE_PRRUN_T | |
2622 | premptyset (&sctl.sigset); | |
2623 | #else | |
2624 | sctl.sigset = pi->prrun.pr_trace; | |
2625 | #endif | |
2626 | ||
2627 | notice_signals (pi, &sctl); | |
2628 | ||
2629 | #ifdef HAVE_PRRUN_T | |
2630 | pi->prrun.pr_trace = sctl.sigset; | |
2631 | #endif | |
2632 | } | |
2633 | ||
2634 | static void | |
2635 | notice_signals (pi, sctl) | |
2636 | struct procinfo *pi; | |
2637 | struct sig_ctl *sctl; | |
2638 | { | |
2639 | int signo; | |
2640 | ||
2641 | for (signo = 0; signo < NSIG; signo++) | |
2642 | { | |
2643 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
2644 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
2645 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
2646 | { | |
2647 | prdelset (&sctl->sigset, signo); | |
2648 | } | |
2649 | else | |
2650 | { | |
2651 | praddset (&sctl->sigset, signo); | |
2652 | } | |
2653 | } | |
2654 | #ifdef PROCFS_USE_READ_WRITE | |
2655 | sctl->cmd = PCSTRACE; | |
2656 | if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0) | |
2657 | #else | |
2658 | if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset)) | |
2659 | #endif | |
2660 | { | |
2661 | print_sys_errmsg ("PIOCSTRACE failed", errno); | |
2662 | } | |
2663 | } | |
2664 | ||
2665 | /* | |
2666 | ||
2667 | LOCAL FUNCTION | |
2668 | ||
2669 | proc_set_exec_trap -- arrange for exec'd child to halt at startup | |
2670 | ||
2671 | SYNOPSIS | |
2672 | ||
2673 | void proc_set_exec_trap (void) | |
2674 | ||
2675 | DESCRIPTION | |
2676 | ||
2677 | This function is called in the child process when starting up | |
2678 | an inferior, prior to doing the exec of the actual inferior. | |
2679 | It sets the child process's exitset to make exit from the exec | |
2680 | system call an event of interest to stop on, and then simply | |
2681 | returns. The child does the exec, the system call returns, and | |
2682 | the child stops at the first instruction, ready for the gdb | |
2683 | parent process to take control of it. | |
2684 | ||
2685 | NOTE | |
2686 | ||
2687 | We need to use all local variables since the child may be sharing | |
2688 | it's data space with the parent, if vfork was used rather than | |
2689 | fork. | |
2690 | ||
2691 | Also note that we want to turn off the inherit-on-fork flag in | |
2692 | the child process so that any grand-children start with all | |
2693 | tracing flags cleared. | |
2694 | */ | |
2695 | ||
2696 | static void | |
2697 | proc_set_exec_trap () | |
2698 | { | |
2699 | struct sys_ctl exitset; | |
2700 | struct sys_ctl entryset; | |
2701 | char procname[MAX_PROC_NAME_SIZE]; | |
2702 | int fd; | |
2703 | ||
2704 | sprintf (procname, CTL_PROC_NAME_FMT, getpid ()); | |
2705 | #ifdef UNIXWARE | |
2706 | if ((fd = open (procname, O_WRONLY)) < 0) | |
2707 | #else | |
2708 | if ((fd = open (procname, O_RDWR)) < 0) | |
2709 | #endif | |
2710 | { | |
2711 | perror (procname); | |
2712 | gdb_flush (gdb_stderr); | |
2713 | _exit (127); | |
2714 | } | |
2715 | premptyset (&exitset.sysset); | |
2716 | premptyset (&entryset.sysset); | |
2717 | ||
2718 | #ifdef PRFS_STOPEXEC | |
2719 | /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
2720 | exits from exec system calls because of the user level loader. */ | |
2721 | { | |
2722 | int prfs_flags; | |
2723 | ||
2724 | if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0) | |
2725 | { | |
2726 | perror (procname); | |
2727 | gdb_flush (gdb_stderr); | |
2728 | _exit (127); | |
2729 | } | |
2730 | prfs_flags |= PRFS_STOPEXEC; | |
2731 | if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0) | |
2732 | { | |
2733 | perror (procname); | |
2734 | gdb_flush (gdb_stderr); | |
2735 | _exit (127); | |
2736 | } | |
2737 | } | |
2738 | #else /* PRFS_STOPEXEC */ | |
2739 | /* GW: Rationale... | |
2740 | Not all systems with /proc have all the exec* syscalls with the same | |
2741 | names. On the SGI, for example, there is no SYS_exec, but there | |
2742 | *is* a SYS_execv. So, we try to account for that. */ | |
2743 | ||
2744 | #ifdef SYS_exec | |
2745 | praddset (&exitset.sysset, SYS_exec); | |
2746 | #endif | |
2747 | #ifdef SYS_execve | |
2748 | praddset (&exitset.sysset, SYS_execve); | |
2749 | #endif | |
2750 | #ifdef SYS_execv | |
2751 | praddset (&exitset.sysset, SYS_execv); | |
2752 | #endif | |
2753 | ||
2754 | #ifdef PROCFS_USE_READ_WRITE | |
2755 | exitset.cmd = PCSEXIT; | |
2756 | if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0) | |
2757 | #else | |
2758 | if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0) | |
2759 | #endif | |
2760 | { | |
2761 | perror (procname); | |
2762 | gdb_flush (gdb_stderr); | |
2763 | _exit (127); | |
2764 | } | |
2765 | #endif /* PRFS_STOPEXEC */ | |
2766 | ||
2767 | praddset (&entryset.sysset, SYS_exit); | |
2768 | ||
2769 | #ifdef PROCFS_USE_READ_WRITE | |
2770 | entryset.cmd = PCSENTRY; | |
2771 | if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0) | |
2772 | #else | |
2773 | if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0) | |
2774 | #endif | |
2775 | { | |
2776 | perror (procname); | |
2777 | gdb_flush (gdb_stderr); | |
2778 | _exit (126); | |
2779 | } | |
2780 | ||
2781 | /* Turn off inherit-on-fork flag so that all grand-children of gdb | |
2782 | start with tracing flags cleared. */ | |
2783 | ||
2784 | modify_inherit_on_fork_flag (fd, 0); | |
2785 | ||
2786 | /* Turn on run-on-last-close flag so that this process will not hang | |
2787 | if GDB goes away for some reason. */ | |
2788 | ||
2789 | modify_run_on_last_close_flag (fd, 1); | |
2790 | ||
2791 | #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */ | |
2792 | /* NOTE: revisit when doing thread support for UW */ | |
2793 | #ifdef PR_ASYNC | |
2794 | { | |
2795 | long pr_flags; | |
2796 | struct proc_ctl pctl; | |
2797 | ||
2798 | /* Solaris needs this to make procfs treat all threads seperately. Without | |
2799 | this, all threads halt whenever something happens to any thread. Since | |
2800 | GDB wants to control all this itself, it needs to set PR_ASYNC. */ | |
2801 | ||
2802 | pr_flags = PR_ASYNC; | |
2803 | #ifdef PROCFS_USE_READ_WRITE | |
2804 | pctl.cmd = PCSET; | |
2805 | pctl.data = PR_FORK|PR_ASYNC; | |
2806 | write (fd, (char *) &pctl, sizeof (struct proc_ctl)); | |
2807 | #else | |
2808 | ioctl (fd, PIOCSET, &pr_flags); | |
2809 | #endif | |
2810 | } | |
2811 | #endif /* PR_ASYNC */ | |
2812 | #endif /* !UNIXWARE */ | |
2813 | } | |
2814 | ||
2815 | /* | |
2816 | ||
2817 | GLOBAL FUNCTION | |
2818 | ||
2819 | proc_iterate_over_mappings -- call function for every mapped space | |
2820 | ||
2821 | SYNOPSIS | |
2822 | ||
2823 | int proc_iterate_over_mappings (int (*func)()) | |
2824 | ||
2825 | DESCRIPTION | |
2826 | ||
2827 | Given a pointer to a function, call that function for every | |
2828 | mapped address space, passing it an open file descriptor for | |
2829 | the file corresponding to that mapped address space (if any) | |
2830 | and the base address of the mapped space. Quit when we hit | |
2831 | the end of the mappings or the function returns nonzero. | |
2832 | */ | |
2833 | ||
2834 | #ifdef UNIXWARE | |
2835 | int | |
2836 | proc_iterate_over_mappings (func) | |
2837 | int (*func) PARAMS ((int, CORE_ADDR)); | |
2838 | { | |
2839 | int nmap; | |
2840 | int fd; | |
2841 | int funcstat = 0; | |
2842 | prmap_t *prmaps; | |
2843 | prmap_t *prmap; | |
2844 | struct procinfo *pi; | |
2845 | struct stat sbuf; | |
2846 | ||
2847 | pi = current_procinfo; | |
2848 | ||
2849 | if (fstat (pi->map_fd, &sbuf) < 0) | |
2850 | return 0; | |
2851 | ||
2852 | nmap = sbuf.st_size / sizeof (prmap_t); | |
2853 | prmaps = (prmap_t *) alloca (nmap * sizeof(prmap_t)); | |
2854 | if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) && | |
2855 | (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) == | |
2856 | (nmap * sizeof (prmap_t)))) | |
2857 | { | |
2858 | int i = 0; | |
2859 | for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i) | |
2860 | { | |
2861 | char name[sizeof ("/proc/1234567890/object") + | |
2862 | sizeof (prmap->pr_mapname)]; | |
2863 | sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname); | |
2864 | if ((fd = open (name, O_RDONLY)) == -1) | |
2865 | { | |
2866 | funcstat = 1; | |
2867 | break; | |
2868 | } | |
2869 | funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr); | |
2870 | close (fd); | |
2871 | } | |
2872 | } | |
2873 | return (funcstat); | |
2874 | } | |
2875 | #else /* UNIXWARE */ | |
2876 | int | |
2877 | proc_iterate_over_mappings (func) | |
2878 | int (*func) PARAMS ((int, CORE_ADDR)); | |
2879 | { | |
2880 | int nmap; | |
2881 | int fd; | |
2882 | int funcstat = 0; | |
2883 | struct prmap *prmaps; | |
2884 | struct prmap *prmap; | |
2885 | struct procinfo *pi; | |
2886 | ||
2887 | pi = current_procinfo; | |
2888 | ||
2889 | if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0) | |
2890 | { | |
2891 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
2892 | if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0) | |
2893 | { | |
2894 | for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap) | |
2895 | { | |
2896 | fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0); | |
2897 | funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr); | |
2898 | close (fd); | |
2899 | } | |
2900 | } | |
2901 | } | |
2902 | return (funcstat); | |
2903 | } | |
2904 | #endif /* UNIXWARE */ | |
2905 | ||
2906 | #if 0 /* Currently unused */ | |
2907 | /* | |
2908 | ||
2909 | GLOBAL FUNCTION | |
2910 | ||
2911 | proc_base_address -- find base address for segment containing address | |
2912 | ||
2913 | SYNOPSIS | |
2914 | ||
2915 | CORE_ADDR proc_base_address (CORE_ADDR addr) | |
2916 | ||
2917 | DESCRIPTION | |
2918 | ||
2919 | Given an address of a location in the inferior, find and return | |
2920 | the base address of the mapped segment containing that address. | |
2921 | ||
2922 | This is used for example, by the shared library support code, | |
2923 | where we have the pc value for some location in the shared library | |
2924 | where we are stopped, and need to know the base address of the | |
2925 | segment containing that address. | |
2926 | */ | |
2927 | ||
2928 | CORE_ADDR | |
2929 | proc_base_address (addr) | |
2930 | CORE_ADDR addr; | |
2931 | { | |
2932 | int nmap; | |
2933 | struct prmap *prmaps; | |
2934 | struct prmap *prmap; | |
2935 | CORE_ADDR baseaddr = 0; | |
2936 | struct procinfo *pi; | |
2937 | ||
2938 | pi = current_procinfo; | |
2939 | ||
2940 | if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0) | |
2941 | { | |
2942 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
2943 | if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0) | |
2944 | { | |
2945 | for (prmap = prmaps; prmap -> pr_size; ++prmap) | |
2946 | { | |
2947 | if ((prmap -> pr_vaddr <= (caddr_t) addr) && | |
2948 | (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr)) | |
2949 | { | |
2950 | baseaddr = (CORE_ADDR) prmap -> pr_vaddr; | |
2951 | break; | |
2952 | } | |
2953 | } | |
2954 | } | |
2955 | } | |
2956 | return (baseaddr); | |
2957 | } | |
2958 | ||
2959 | #endif /* 0 */ | |
2960 | ||
2961 | #ifndef UNIXWARE | |
2962 | /* | |
2963 | ||
2964 | LOCAL FUNCTION | |
2965 | ||
2966 | proc_address_to_fd -- return open fd for file mapped to address | |
2967 | ||
2968 | SYNOPSIS | |
2969 | ||
2970 | int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain) | |
2971 | ||
2972 | DESCRIPTION | |
2973 | ||
2974 | Given an address in the current inferior's address space, use the | |
2975 | /proc interface to find an open file descriptor for the file that | |
2976 | this address was mapped in from. Return -1 if there is no current | |
2977 | inferior. Print a warning message if there is an inferior but | |
2978 | the address corresponds to no file (IE a bogus address). | |
2979 | ||
2980 | */ | |
2981 | ||
2982 | static int | |
2983 | proc_address_to_fd (pi, addr, complain) | |
2984 | struct procinfo *pi; | |
2985 | CORE_ADDR addr; | |
2986 | int complain; | |
2987 | { | |
2988 | int fd = -1; | |
2989 | ||
2990 | if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) &addr)) < 0) | |
2991 | { | |
2992 | if (complain) | |
2993 | { | |
2994 | print_sys_errmsg (pi->pathname, errno); | |
2995 | warning ("can't find mapped file for address 0x%x", addr); | |
2996 | } | |
2997 | } | |
2998 | return (fd); | |
2999 | } | |
3000 | #endif /* !UNIXWARE */ | |
3001 | ||
3002 | /* Attach to process PID, then initialize for debugging it | |
3003 | and wait for the trace-trap that results from attaching. */ | |
3004 | ||
3005 | static void | |
3006 | procfs_attach (args, from_tty) | |
3007 | char *args; | |
3008 | int from_tty; | |
3009 | { | |
3010 | char *exec_file; | |
3011 | int pid; | |
3012 | ||
3013 | if (!args) | |
3014 | error_no_arg ("process-id to attach"); | |
3015 | ||
3016 | pid = atoi (args); | |
3017 | ||
3018 | if (pid == getpid()) /* Trying to masturbate? */ | |
3019 | error ("I refuse to debug myself!"); | |
3020 | ||
3021 | if (from_tty) | |
3022 | { | |
3023 | exec_file = (char *) get_exec_file (0); | |
3024 | ||
3025 | if (exec_file) | |
3026 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid)); | |
3027 | else | |
3028 | printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid)); | |
3029 | ||
3030 | gdb_flush (gdb_stdout); | |
3031 | } | |
3032 | ||
3033 | inferior_pid = pid = do_attach (pid); | |
3034 | push_target (&procfs_ops); | |
3035 | } | |
3036 | ||
3037 | ||
3038 | /* Take a program previously attached to and detaches it. | |
3039 | The program resumes execution and will no longer stop | |
3040 | on signals, etc. We'd better not have left any breakpoints | |
3041 | in the program or it'll die when it hits one. For this | |
3042 | to work, it may be necessary for the process to have been | |
3043 | previously attached. It *might* work if the program was | |
3044 | started via the normal ptrace (PTRACE_TRACEME). */ | |
3045 | ||
3046 | static void | |
3047 | procfs_detach (args, from_tty) | |
3048 | char *args; | |
3049 | int from_tty; | |
3050 | { | |
3051 | int siggnal = 0; | |
3052 | ||
3053 | if (from_tty) | |
3054 | { | |
3055 | char *exec_file = get_exec_file (0); | |
3056 | if (exec_file == 0) | |
3057 | exec_file = ""; | |
3058 | printf_unfiltered ("Detaching from program: %s %s\n", | |
3059 | exec_file, target_pid_to_str (inferior_pid)); | |
3060 | gdb_flush (gdb_stdout); | |
3061 | } | |
3062 | if (args) | |
3063 | siggnal = atoi (args); | |
3064 | ||
3065 | do_detach (siggnal); | |
3066 | inferior_pid = 0; | |
3067 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ | |
3068 | } | |
3069 | ||
3070 | /* Get ready to modify the registers array. On machines which store | |
3071 | individual registers, this doesn't need to do anything. On machines | |
3072 | which store all the registers in one fell swoop, this makes sure | |
3073 | that registers contains all the registers from the program being | |
3074 | debugged. */ | |
3075 | ||
3076 | static void | |
3077 | procfs_prepare_to_store () | |
3078 | { | |
3079 | #ifdef CHILD_PREPARE_TO_STORE | |
3080 | CHILD_PREPARE_TO_STORE (); | |
3081 | #endif | |
3082 | } | |
3083 | ||
3084 | /* Print status information about what we're accessing. */ | |
3085 | ||
3086 | static void | |
3087 | procfs_files_info (ignore) | |
3088 | struct target_ops *ignore; | |
3089 | { | |
3090 | printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n", | |
3091 | attach_flag? "attached": "child", target_pid_to_str (inferior_pid)); | |
3092 | } | |
3093 | ||
3094 | /* ARGSUSED */ | |
3095 | static void | |
3096 | procfs_open (arg, from_tty) | |
3097 | char *arg; | |
3098 | int from_tty; | |
3099 | { | |
3100 | error ("Use the \"run\" command to start a Unix child process."); | |
3101 | } | |
3102 | ||
3103 | /* | |
3104 | ||
3105 | LOCAL FUNCTION | |
3106 | ||
3107 | do_attach -- attach to an already existing process | |
3108 | ||
3109 | SYNOPSIS | |
3110 | ||
3111 | int do_attach (int pid) | |
3112 | ||
3113 | DESCRIPTION | |
3114 | ||
3115 | Attach to an already existing process with the specified process | |
3116 | id. If the process is not already stopped, query whether to | |
3117 | stop it or not. | |
3118 | ||
3119 | NOTES | |
3120 | ||
3121 | The option of stopping at attach time is specific to the /proc | |
3122 | versions of gdb. Versions using ptrace force the attachee | |
3123 | to stop. (I have changed this version to do so, too. All you | |
3124 | have to do is "continue" to make it go on. -- gnu@cygnus.com) | |
3125 | ||
3126 | */ | |
3127 | ||
3128 | static int | |
3129 | do_attach (pid) | |
3130 | int pid; | |
3131 | { | |
3132 | struct procinfo *pi; | |
3133 | struct sig_ctl sctl; | |
3134 | struct flt_ctl fctl; | |
3135 | int nlwp, *lwps; | |
3136 | ||
3137 | pi = init_procinfo (pid, 0); | |
3138 | ||
3139 | #ifdef PIOCLWPIDS | |
3140 | nlwp = pi->prstatus.pr_nlwp; | |
3141 | lwps = alloca ((2 * nlwp + 2) * sizeof (id_t)); | |
3142 | ||
3143 | if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps)) | |
3144 | { | |
3145 | print_sys_errmsg (pi -> pathname, errno); | |
3146 | error ("PIOCLWPIDS failed"); | |
3147 | } | |
3148 | #else /* PIOCLWPIDS */ | |
3149 | nlwp = 1; | |
3150 | lwps = alloca ((2 * nlwp + 2) * sizeof *lwps); | |
3151 | lwps[0] = 0; | |
3152 | #endif | |
3153 | for (; nlwp > 0; nlwp--, lwps++) | |
3154 | { | |
3155 | /* First one has already been created above. */ | |
3156 | if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0) | |
3157 | pi = init_procinfo ((*lwps << 16) | pid, 0); | |
3158 | ||
3159 | if (THE_PR_LWP(pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)) | |
3160 | { | |
3161 | pi->was_stopped = 1; | |
3162 | } | |
3163 | else | |
3164 | { | |
3165 | pi->was_stopped = 0; | |
3166 | if (1 || query ("Process is currently running, stop it? ")) | |
3167 | { | |
3168 | long cmd; | |
3169 | /* Make it run again when we close it. */ | |
3170 | modify_run_on_last_close_flag (pi->ctl_fd, 1); | |
3171 | #ifdef PROCFS_USE_READ_WRITE | |
3172 | cmd = PCSTOP; | |
3173 | if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0) | |
3174 | #else | |
3175 | if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0) | |
3176 | #endif | |
3177 | { | |
3178 | print_sys_errmsg (pi->pathname, errno); | |
3179 | close_proc_file (pi); | |
3180 | error ("PIOCSTOP failed"); | |
3181 | } | |
3182 | #ifdef UNIXWARE | |
3183 | if (!procfs_read_status (pi)) | |
3184 | { | |
3185 | print_sys_errmsg (pi->pathname, errno); | |
3186 | close_proc_file (pi); | |
3187 | error ("procfs_read_status failed"); | |
3188 | } | |
3189 | #endif | |
3190 | pi->nopass_next_sigstop = 1; | |
3191 | } | |
3192 | else | |
3193 | { | |
3194 | printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", | |
3195 | target_pid_to_str (pi->pid)); | |
3196 | } | |
3197 | } | |
3198 | ||
3199 | #ifdef PROCFS_USE_READ_WRITE | |
3200 | fctl.cmd = PCSFAULT; | |
3201 | if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0) | |
3202 | print_sys_errmsg ("PCSFAULT failed", errno); | |
3203 | #else /* PROCFS_USE_READ_WRITE */ | |
3204 | if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault)) | |
3205 | { | |
3206 | print_sys_errmsg ("PIOCSFAULT failed", errno); | |
3207 | } | |
3208 | if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace)) | |
3209 | { | |
3210 | print_sys_errmsg ("PIOCSTRACE failed", errno); | |
3211 | } | |
3212 | add_thread (pi->pid); | |
3213 | procfs_set_inferior_syscall_traps (pi); | |
3214 | #endif /* PROCFS_USE_READ_WRITE */ | |
3215 | } | |
3216 | attach_flag = 1; | |
3217 | return (pi->pid); | |
3218 | } | |
3219 | ||
3220 | /* | |
3221 | ||
3222 | LOCAL FUNCTION | |
3223 | ||
3224 | do_detach -- detach from an attached-to process | |
3225 | ||
3226 | SYNOPSIS | |
3227 | ||
3228 | void do_detach (int signal) | |
3229 | ||
3230 | DESCRIPTION | |
3231 | ||
3232 | Detach from the current attachee. | |
3233 | ||
3234 | If signal is non-zero, the attachee is started running again and sent | |
3235 | the specified signal. | |
3236 | ||
3237 | If signal is zero and the attachee was not already stopped when we | |
3238 | attached to it, then we make it runnable again when we detach. | |
3239 | ||
3240 | Otherwise, we query whether or not to make the attachee runnable | |
3241 | again, since we may simply want to leave it in the state it was in | |
3242 | when we attached. | |
3243 | ||
3244 | We report any problems, but do not consider them errors, since we | |
3245 | MUST detach even if some things don't seem to go right. This may not | |
3246 | be the ideal situation. (FIXME). | |
3247 | */ | |
3248 | ||
3249 | static void | |
3250 | do_detach (signal) | |
3251 | int signal; | |
3252 | { | |
3253 | struct procinfo *pi; | |
3254 | ||
3255 | for (pi = procinfo_list; pi; pi = pi->next) | |
3256 | { | |
3257 | if (signal) | |
3258 | { | |
3259 | set_proc_siginfo (pi, signal); | |
3260 | } | |
3261 | #ifdef PROCFS_USE_READ_WRITE | |
3262 | pi->saved_exitset.cmd = PCSEXIT; | |
3263 | if (write (pi->ctl_fd, (char *) &pi->saved_exitset, | |
3264 | sizeof (struct sys_ctl)) < 0) | |
3265 | #else | |
3266 | if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0) | |
3267 | #endif | |
3268 | { | |
3269 | print_sys_errmsg (pi->pathname, errno); | |
3270 | printf_unfiltered ("PIOCSEXIT failed.\n"); | |
3271 | } | |
3272 | #ifdef PROCFS_USE_READ_WRITE | |
3273 | pi->saved_entryset.cmd = PCSENTRY; | |
3274 | if (write (pi->ctl_fd, (char *) &pi->saved_entryset, | |
3275 | sizeof (struct sys_ctl)) < 0) | |
3276 | #else | |
3277 | if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0) | |
3278 | #endif | |
3279 | { | |
3280 | print_sys_errmsg (pi->pathname, errno); | |
3281 | printf_unfiltered ("PIOCSENTRY failed.\n"); | |
3282 | } | |
3283 | #ifdef PROCFS_USE_READ_WRITE | |
3284 | pi->saved_trace.cmd = PCSTRACE; | |
3285 | if (write (pi->ctl_fd, (char *) &pi->saved_trace, | |
3286 | sizeof (struct sig_ctl)) < 0) | |
3287 | #else | |
3288 | if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0) | |
3289 | #endif | |
3290 | { | |
3291 | print_sys_errmsg (pi->pathname, errno); | |
3292 | printf_unfiltered ("PIOCSTRACE failed.\n"); | |
3293 | } | |
3294 | #ifndef UNIXWARE | |
3295 | if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0) | |
3296 | { | |
3297 | print_sys_errmsg (pi->pathname, errno); | |
3298 | printf_unfiltered ("PIOSCHOLD failed.\n"); | |
3299 | } | |
3300 | #endif | |
3301 | #ifdef PROCFS_USE_READ_WRITE | |
3302 | pi->saved_fltset.cmd = PCSFAULT; | |
3303 | if (write (pi->ctl_fd, (char *) &pi->saved_fltset, | |
3304 | sizeof (struct flt_ctl)) < 0) | |
3305 | #else | |
3306 | if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0) | |
3307 | #endif | |
3308 | { | |
3309 | print_sys_errmsg (pi->pathname, errno); | |
3310 | printf_unfiltered ("PIOCSFAULT failed.\n"); | |
3311 | } | |
3312 | if (!procfs_read_status (pi)) | |
3313 | { | |
3314 | print_sys_errmsg (pi->pathname, errno); | |
3315 | printf_unfiltered ("procfs_read_status failed.\n"); | |
3316 | } | |
3317 | else | |
3318 | { | |
3319 | if (signal | |
3320 | || (THE_PR_LWP(pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP))) | |
3321 | { | |
3322 | long cmd; | |
3323 | struct proc_ctl pctl; | |
3324 | ||
3325 | if (signal || !pi->was_stopped || | |
3326 | query ("Was stopped when attached, make it runnable again? ")) | |
3327 | { | |
3328 | /* Clear any pending signal if we want to detach without | |
3329 | a signal. */ | |
3330 | if (signal == 0) | |
3331 | set_proc_siginfo (pi, signal); | |
3332 | ||
3333 | /* Clear any fault that might have stopped it. */ | |
3334 | #ifdef PROCFS_USE_READ_WRITE | |
3335 | cmd = PCCFAULT; | |
3336 | if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0) | |
3337 | #else | |
3338 | if (ioctl (pi->ctl_fd, PIOCCFAULT, 0)) | |
3339 | #endif | |
3340 | { | |
3341 | print_sys_errmsg (pi->pathname, errno); | |
3342 | printf_unfiltered ("PIOCCFAULT failed.\n"); | |
3343 | } | |
3344 | ||
3345 | /* Make it run again when we close it. */ | |
3346 | ||
3347 | modify_run_on_last_close_flag (pi->ctl_fd, 1); | |
3348 | } | |
3349 | } | |
3350 | } | |
3351 | close_proc_file (pi); | |
3352 | } | |
3353 | attach_flag = 0; | |
3354 | } | |
3355 | ||
3356 | /* emulate wait() as much as possible. | |
3357 | Wait for child to do something. Return pid of child, or -1 in case | |
3358 | of error; store status in *OURSTATUS. | |
3359 | ||
3360 | Not sure why we can't | |
3361 | just use wait(), but it seems to have problems when applied to a | |
3362 | process being controlled with the /proc interface. | |
3363 | ||
3364 | We have a race problem here with no obvious solution. We need to let | |
3365 | the inferior run until it stops on an event of interest, which means | |
3366 | that we need to use the PIOCWSTOP ioctl. However, we cannot use this | |
3367 | ioctl if the process is already stopped on something that is not an | |
3368 | event of interest, or the call will hang indefinitely. Thus we first | |
3369 | use PIOCSTATUS to see if the process is not stopped. If not, then we | |
3370 | use PIOCWSTOP. But during the window between the two, if the process | |
3371 | stops for any reason that is not an event of interest (such as a job | |
3372 | control signal) then gdb will hang. One possible workaround is to set | |
3373 | an alarm to wake up every minute of so and check to see if the process | |
3374 | is still running, and if so, then reissue the PIOCWSTOP. But this is | |
3375 | a real kludge, so has not been implemented. FIXME: investigate | |
3376 | alternatives. | |
3377 | ||
3378 | FIXME: Investigate why wait() seems to have problems with programs | |
3379 | being control by /proc routines. */ | |
3380 | static int | |
3381 | procfs_wait (pid, ourstatus) | |
3382 | int pid; | |
3383 | struct target_waitstatus *ourstatus; | |
3384 | { | |
3385 | short what; | |
3386 | short why; | |
3387 | int statval = 0; | |
3388 | int checkerr = 0; | |
3389 | int rtnval = -1; | |
3390 | struct procinfo *pi; | |
3391 | struct proc_ctl pctl; | |
3392 | ||
3393 | scan_again: | |
3394 | ||
3395 | /* handle all syscall events first, otherwise we might not | |
3396 | notice a thread was created until too late. */ | |
3397 | ||
3398 | for (pi = procinfo_list; pi; pi = pi->next) | |
3399 | { | |
3400 | if (!pi->had_event) | |
3401 | continue; | |
3402 | ||
3403 | if (! (THE_PR_LWP(pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)) ) | |
3404 | continue; | |
3405 | ||
3406 | why = THE_PR_LWP(pi->prstatus).pr_why; | |
3407 | what = THE_PR_LWP(pi->prstatus).pr_what; | |
3408 | if (why == PR_SYSENTRY || why == PR_SYSEXIT) | |
3409 | { | |
3410 | int i; | |
3411 | int found_handler = 0; | |
3412 | ||
3413 | for (i = 0; i < pi->num_syscall_handlers; i++) | |
3414 | if (pi->syscall_handlers[i].syscall_num == what) | |
3415 | { | |
3416 | found_handler = 1; | |
3417 | pi->saved_rtnval = pi->pid; | |
3418 | pi->saved_statval = 0; | |
3419 | if (!pi->syscall_handlers[i].func | |
3420 | (pi, what, why, &pi->saved_rtnval, &pi->saved_statval)) | |
3421 | pi->had_event = 0; | |
3422 | break; | |
3423 | } | |
3424 | ||
3425 | if (!found_handler) | |
3426 | { | |
3427 | if (why == PR_SYSENTRY) | |
3428 | error ("PR_SYSENTRY, unhandled system call %d", what); | |
3429 | else | |
3430 | error ("PR_SYSEXIT, unhandled system call %d", what); | |
3431 | } | |
3432 | } | |
3433 | } | |
3434 | ||
3435 | /* find a relevant process with an event */ | |
3436 | ||
3437 | for (pi = procinfo_list; pi; pi = pi->next) | |
3438 | if (pi->had_event && (pid == -1 || pi->pid == pid)) | |
3439 | break; | |
3440 | ||
3441 | if (!pi) | |
3442 | { | |
3443 | wait_fd (); | |
3444 | goto scan_again; | |
3445 | } | |
3446 | ||
3447 | if (!checkerr | |
3448 | && !(THE_PR_LWP(pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP))) | |
3449 | { | |
3450 | if (!procfs_write_pcwstop (pi)) | |
3451 | { | |
3452 | checkerr++; | |
3453 | } | |
3454 | } | |
3455 | if (checkerr) | |
3456 | { | |
3457 | if (errno == ENOENT) | |
3458 | { | |
3459 | /* XXX Fixme -- what to do if attached? Can't call wait... */ | |
3460 | rtnval = wait (&statval); | |
3461 | if ((rtnval) != (PIDGET (inferior_pid))) | |
3462 | { | |
3463 | print_sys_errmsg (pi->pathname, errno); | |
3464 | error ("procfs_wait: wait failed, returned %d", rtnval); | |
3465 | /* NOTREACHED */ | |
3466 | } | |
3467 | } | |
3468 | else | |
3469 | { | |
3470 | print_sys_errmsg (pi->pathname, errno); | |
3471 | error ("PIOCSTATUS or PIOCWSTOP failed."); | |
3472 | /* NOTREACHED */ | |
3473 | } | |
3474 | } | |
3475 | else if (THE_PR_LWP(pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)) | |
3476 | { | |
3477 | #ifdef UNIXWARE | |
3478 | rtnval = pi->prstatus.pr_pid; | |
3479 | #else | |
3480 | rtnval = pi->pid; | |
3481 | #endif | |
3482 | why = THE_PR_LWP(pi->prstatus).pr_why; | |
3483 | what = THE_PR_LWP(pi->prstatus).pr_what; | |
3484 | ||
3485 | switch (why) | |
3486 | { | |
3487 | case PR_SIGNALLED: | |
3488 | statval = (what << 8) | 0177; | |
3489 | break; | |
3490 | case PR_SYSENTRY: | |
3491 | case PR_SYSEXIT: | |
3492 | rtnval = pi->saved_rtnval; | |
3493 | statval = pi->saved_statval; | |
3494 | break; | |
3495 | case PR_REQUESTED: | |
3496 | statval = (SIGSTOP << 8) | 0177; | |
3497 | break; | |
3498 | case PR_JOBCONTROL: | |
3499 | statval = (what << 8) | 0177; | |
3500 | break; | |
3501 | case PR_FAULTED: | |
3502 | switch (what) | |
3503 | { | |
3504 | #ifdef FLTWATCH | |
3505 | case FLTWATCH: | |
3506 | statval = (SIGTRAP << 8) | 0177; | |
3507 | break; | |
3508 | #endif | |
3509 | #ifdef FLTKWATCH | |
3510 | case FLTKWATCH: | |
3511 | statval = (SIGTRAP << 8) | 0177; | |
3512 | break; | |
3513 | #endif | |
3514 | #ifndef FAULTED_USE_SIGINFO | |
3515 | /* Irix, contrary to the documentation, fills in 0 for si_signo. | |
3516 | Solaris fills in si_signo. I'm not sure about others. */ | |
3517 | case FLTPRIV: | |
3518 | case FLTILL: | |
3519 | statval = (SIGILL << 8) | 0177; | |
3520 | break; | |
3521 | case FLTBPT: | |
3522 | case FLTTRACE: | |
3523 | statval = (SIGTRAP << 8) | 0177; | |
3524 | break; | |
3525 | case FLTSTACK: | |
3526 | case FLTACCESS: | |
3527 | case FLTBOUNDS: | |
3528 | statval = (SIGSEGV << 8) | 0177; | |
3529 | break; | |
3530 | case FLTIOVF: | |
3531 | case FLTIZDIV: | |
3532 | case FLTFPE: | |
3533 | statval = (SIGFPE << 8) | 0177; | |
3534 | break; | |
3535 | case FLTPAGE: /* Recoverable page fault */ | |
3536 | #endif /* not FAULTED_USE_SIGINFO */ | |
3537 | default: | |
3538 | /* Use the signal which the kernel assigns. This is better than | |
3539 | trying to second-guess it from the fault. In fact, I suspect | |
3540 | that FLTACCESS can be either SIGSEGV or SIGBUS. */ | |
3541 | statval = | |
3542 | ((THE_PR_LWP(pi->prstatus).pr_info.si_signo) << 8) | 0177; | |
3543 | break; | |
3544 | } | |
3545 | break; | |
3546 | default: | |
3547 | error ("PIOCWSTOP, unknown why %d, what %d", why, what); | |
3548 | } | |
3549 | /* Stop all the other threads when any of them stops. */ | |
3550 | ||
3551 | { | |
3552 | struct procinfo *procinfo, *next_pi; | |
3553 | ||
3554 | for (procinfo = procinfo_list; procinfo; procinfo = next_pi) | |
3555 | { | |
3556 | next_pi = procinfo->next; | |
3557 | if (!procinfo->had_event) | |
3558 | { | |
3559 | #ifdef PROCFS_USE_READ_WRITE | |
3560 | long cmd = PCSTOP; | |
3561 | if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0) | |
3562 | { | |
3563 | print_sys_errmsg (procinfo->pathname, errno); | |
3564 | error ("PCSTOP failed"); | |
3565 | } | |
3566 | #else | |
3567 | /* A bug in Solaris (2.5) causes us to hang when trying to | |
3568 | stop a stopped process. So, we have to check first in | |
3569 | order to avoid the hang. */ | |
3570 | if (!procfs_read_status (procinfo)) | |
3571 | { | |
3572 | /* The LWP has apparently terminated. */ | |
3573 | if (info_verbose) | |
3574 | printf_filtered ("LWP %d doesn't respond.\n", | |
3575 | (procinfo->pid >> 16) & 0xffff); | |
3576 | close_proc_file (procinfo); | |
3577 | continue; | |
3578 | } | |
3579 | ||
3580 | if (!(procinfo->prstatus.pr_flags & PR_STOPPED)) | |
3581 | if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus) | |
3582 | < 0) | |
3583 | { | |
3584 | print_sys_errmsg (procinfo->pathname, errno); | |
3585 | warning ("PIOCSTOP failed"); | |
3586 | } | |
3587 | #endif | |
3588 | } | |
3589 | } | |
3590 | } | |
3591 | } | |
3592 | else | |
3593 | { | |
3594 | error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x", | |
3595 | THE_PR_LWP(pi->prstatus).pr_flags); | |
3596 | } | |
3597 | ||
3598 | store_waitstatus (ourstatus, statval); | |
3599 | ||
3600 | if (rtnval == -1) /* No more children to wait for */ | |
3601 | { | |
3602 | warning ("Child process unexpectedly missing"); | |
3603 | /* Claim it exited with unknown signal. */ | |
3604 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
3605 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
3606 | return rtnval; | |
3607 | } | |
3608 | ||
3609 | pi->had_event = 0; /* Indicate that we've seen this one */ | |
3610 | return (rtnval); | |
3611 | } | |
3612 | ||
3613 | /* | |
3614 | ||
3615 | LOCAL FUNCTION | |
3616 | ||
3617 | set_proc_siginfo - set a process's current signal info | |
3618 | ||
3619 | SYNOPSIS | |
3620 | ||
3621 | void set_proc_siginfo (struct procinfo *pip, int signo); | |
3622 | ||
3623 | DESCRIPTION | |
3624 | ||
3625 | Given a pointer to a process info struct in PIP and a signal number | |
3626 | in SIGNO, set the process's current signal and its associated signal | |
3627 | information. The signal will be delivered to the process immediately | |
3628 | after execution is resumed, even if it is being held. In addition, | |
3629 | this particular delivery will not cause another PR_SIGNALLED stop | |
3630 | even if the signal is being traced. | |
3631 | ||
3632 | If we are not delivering the same signal that the prstatus siginfo | |
3633 | struct contains information about, then synthesize a siginfo struct | |
3634 | to match the signal we are doing to deliver, make it of the type | |
3635 | "generated by a user process", and send this synthesized copy. When | |
3636 | used to set the inferior's signal state, this will be required if we | |
3637 | are not currently stopped because of a traced signal, or if we decide | |
3638 | to continue with a different signal. | |
3639 | ||
3640 | Note that when continuing the inferior from a stop due to receipt | |
3641 | of a traced signal, we either have set PRCSIG to clear the existing | |
3642 | signal, or we have to call this function to do a PIOCSSIG with either | |
3643 | the existing siginfo struct from pr_info, or one we have synthesized | |
3644 | appropriately for the signal we want to deliver. Otherwise if the | |
3645 | signal is still being traced, the inferior will immediately stop | |
3646 | again. | |
3647 | ||
3648 | See siginfo(5) for more details. | |
3649 | */ | |
3650 | ||
3651 | static void | |
3652 | set_proc_siginfo (pip, signo) | |
3653 | struct procinfo *pip; | |
3654 | int signo; | |
3655 | { | |
3656 | struct siginfo newsiginfo; | |
3657 | struct siginfo *sip; | |
3658 | struct sigi_ctl sictl; | |
3659 | ||
3660 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
3661 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
3662 | receives a PIOCSSIG with a signal identical to the current signal, | |
3663 | it messes up the current signal. Work around the kernel bug. */ | |
3664 | if (signo == THE_PR_LWP(pip->prstatus).pr_cursig) | |
3665 | return; | |
3666 | #endif | |
3667 | ||
3668 | #ifdef UNIXWARE | |
3669 | if (signo == THE_PR_LWP(pip->prstatus).pr_info.si_signo) | |
3670 | { | |
3671 | memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info, | |
3672 | sizeof (siginfo_t)); | |
3673 | } | |
3674 | #else | |
3675 | if (signo == THE_PR_LWP(pip->prstatus).pr_info.si_signo) | |
3676 | { | |
3677 | sip = &pip -> prstatus.pr_info; | |
3678 | } | |
3679 | #endif | |
3680 | else | |
3681 | { | |
3682 | #ifdef UNIXWARE | |
3683 | siginfo_t *sip = &sictl.siginfo; | |
3684 | memset ((char *) sip, 0, sizeof (siginfo_t)); | |
3685 | #else | |
3686 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); | |
3687 | sip = &newsiginfo; | |
3688 | #endif | |
3689 | sip -> si_signo = signo; | |
3690 | sip -> si_code = 0; | |
3691 | sip -> si_errno = 0; | |
3692 | sip -> si_pid = getpid (); | |
3693 | sip -> si_uid = getuid (); | |
3694 | } | |
3695 | #ifdef PROCFS_USE_READ_WRITE | |
3696 | sictl.cmd = PCSSIG; | |
3697 | if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0) | |
3698 | #else | |
3699 | if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0) | |
3700 | #endif | |
3701 | { | |
3702 | print_sys_errmsg (pip -> pathname, errno); | |
3703 | warning ("PIOCSSIG failed"); | |
3704 | } | |
3705 | } | |
3706 | ||
3707 | /* Resume execution of process PID. If STEP is nozero, then | |
3708 | just single step it. If SIGNAL is nonzero, restart it with that | |
3709 | signal activated. */ | |
3710 | ||
3711 | static void | |
3712 | procfs_resume (pid, step, signo) | |
3713 | int pid; | |
3714 | int step; | |
3715 | enum target_signal signo; | |
3716 | { | |
3717 | int signal_to_pass; | |
3718 | struct procinfo *pi, *procinfo, *next_pi; | |
3719 | struct proc_ctl pctl; | |
3720 | ||
3721 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); | |
3722 | ||
3723 | errno = 0; | |
3724 | #ifdef UNIXWARE | |
3725 | pctl.cmd = PCRUN; | |
3726 | pctl.data = PRCFAULT; | |
3727 | #else | |
3728 | pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT; | |
3729 | #endif | |
3730 | ||
3731 | #if 0 | |
3732 | /* It should not be necessary. If the user explicitly changes the value, | |
3733 | value_assign calls write_register_bytes, which writes it. */ | |
3734 | /* It may not be absolutely necessary to specify the PC value for | |
3735 | restarting, but to be safe we use the value that gdb considers | |
3736 | to be current. One case where this might be necessary is if the | |
3737 | user explicitly changes the PC value that gdb considers to be | |
3738 | current. FIXME: Investigate if this is necessary or not. */ | |
3739 | ||
3740 | #ifdef PRSVADDR_BROKEN | |
3741 | /* Can't do this under Solaris running on a Sparc, as there seems to be no | |
3742 | place to put nPC. In fact, if you use this, nPC seems to be set to some | |
3743 | random garbage. We have to rely on the fact that PC and nPC have been | |
3744 | written previously via PIOCSREG during a register flush. */ | |
3745 | ||
3746 | pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)]; | |
3747 | pi->prrun.pr_flags != PRSVADDR; | |
3748 | #endif | |
3749 | #endif | |
3750 | ||
3751 | if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop) | |
3752 | /* When attaching to a child process, if we forced it to stop with | |
3753 | a PIOCSTOP, then we will have set the nopass_next_sigstop flag. | |
3754 | Upon resuming the first time after such a stop, we explicitly | |
3755 | inhibit sending it another SIGSTOP, which would be the normal | |
3756 | result of default signal handling. One potential drawback to | |
3757 | this is that we will also ignore any attempt to by the user | |
3758 | to explicitly continue after the attach with a SIGSTOP. Ultimately | |
3759 | this problem should be dealt with by making the routines that | |
3760 | deal with the inferior a little smarter, and possibly even allow | |
3761 | an inferior to continue running at the same time as gdb. (FIXME?) */ | |
3762 | signal_to_pass = 0; | |
3763 | else if (signo == TARGET_SIGNAL_TSTP | |
3764 | && THE_PR_LWP(pi->prstatus).pr_cursig == SIGTSTP | |
3765 | && THE_PR_LWP(pi->prstatus).pr_action.sa_handler == SIG_DFL | |
3766 | ) | |
3767 | ||
3768 | /* We are about to pass the inferior a SIGTSTP whose action is | |
3769 | SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop | |
3770 | (notifying the parent via wait()), and then keep going from the | |
3771 | same place when the parent is ready for you to keep going. So | |
3772 | under the debugger, it should do nothing (as if the program had | |
3773 | been stopped and then later resumed. Under ptrace, this | |
3774 | happens for us, but under /proc, the system obligingly stops | |
3775 | the process, and wait_for_inferior would have no way of | |
3776 | distinguishing that type of stop (which indicates that we | |
3777 | should just start it again), with a stop due to the pr_trace | |
3778 | field of the prrun_t struct. | |
3779 | ||
3780 | Note that if the SIGTSTP is being caught, we *do* need to pass it, | |
3781 | because the handler needs to get executed. */ | |
3782 | signal_to_pass = 0; | |
3783 | else | |
3784 | signal_to_pass = target_signal_to_host (signo); | |
3785 | ||
3786 | if (signal_to_pass) | |
3787 | { | |
3788 | set_proc_siginfo (pi, signal_to_pass); | |
3789 | } | |
3790 | else | |
3791 | { | |
3792 | #ifdef UNIXWARE | |
3793 | pctl.data |= PRCSIG; | |
3794 | #else | |
3795 | pi->prrun.pr_flags |= PRCSIG; | |
3796 | #endif | |
3797 | } | |
3798 | pi->nopass_next_sigstop = 0; | |
3799 | if (step) | |
3800 | { | |
3801 | #ifdef UNIXWARE | |
3802 | pctl.data |= PRSTEP; | |
3803 | #else | |
3804 | pi->prrun.pr_flags |= PRSTEP; | |
3805 | #endif | |
3806 | } | |
3807 | pi->had_event = 0; | |
3808 | /* Don't try to start a process unless it's stopped on an | |
3809 | `event of interest'. Doing so will cause errors. */ | |
3810 | ||
3811 | if (!procfs_read_status (pi)) | |
3812 | { | |
3813 | /* The LWP has apparently terminated. */ | |
3814 | if (info_verbose) | |
3815 | printf_filtered ("LWP %d doesn't respond.\n", | |
3816 | (pi->pid >> 16) & 0xffff); | |
3817 | close_proc_file (pi); | |
3818 | } | |
3819 | else | |
3820 | { | |
3821 | #ifdef PROCFS_USE_READ_WRITE | |
3822 | if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) | |
3823 | #else | |
3824 | if ((pi->prstatus.pr_flags & PR_ISTOP) | |
3825 | && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) | |
3826 | #endif | |
3827 | { | |
3828 | /* The LWP has apparently terminated. */ | |
3829 | if (info_verbose) | |
3830 | printf_filtered ("LWP %d doesn't respond.\n", | |
3831 | (pi->pid >> 16) & 0xffff); | |
3832 | close_proc_file (pi); | |
3833 | } | |
3834 | } | |
3835 | ||
3836 | /* Continue all the other threads that haven't had an event of interest. | |
3837 | Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only | |
3838 | set by do_attach, and means this is the first resume after an attach. | |
3839 | All threads were CSTOP'd by do_attach, and should be resumed now. */ | |
3840 | ||
3841 | if (pid == -1) | |
3842 | for (procinfo = procinfo_list; procinfo; procinfo = next_pi) | |
3843 | { | |
3844 | next_pi = procinfo->next; | |
3845 | if (pi != procinfo) | |
3846 | if (!procinfo->had_event || | |
3847 | (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP)) | |
3848 | { | |
3849 | procinfo->had_event = procinfo->nopass_next_sigstop = 0; | |
3850 | #ifdef PROCFS_USE_READ_WRITE | |
3851 | pctl.data = PRCFAULT | PRCSIG; | |
3852 | if (write (procinfo->ctl_fd, (char *) &pctl, | |
3853 | sizeof (struct proc_ctl)) < 0) | |
3854 | { | |
3855 | if (!procfs_read_status (procinfo)) | |
3856 | fprintf_unfiltered(gdb_stderr, | |
3857 | "procfs_read_status failed, errno=%d\n", | |
3858 | errno); | |
3859 | print_sys_errmsg (procinfo->pathname, errno); | |
3860 | error ("PCRUN failed"); | |
3861 | } | |
3862 | #else | |
3863 | procinfo->prrun.pr_flags &= PRSTEP; | |
3864 | procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG; | |
3865 | if (!procfs_read_status (procinfo)) | |
3866 | { | |
3867 | /* The LWP has apparently terminated. */ | |
3868 | if (info_verbose) | |
3869 | printf_filtered ("LWP %d doesn't respond.\n", | |
3870 | (procinfo->pid >> 16) & 0xffff); | |
3871 | close_proc_file (procinfo); | |
3872 | continue; | |
3873 | } | |
3874 | ||
3875 | /* Don't try to start a process unless it's stopped on an | |
3876 | `event of interest'. Doing so will cause errors. */ | |
3877 | ||
3878 | if ((procinfo->prstatus.pr_flags & PR_ISTOP) | |
3879 | && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0) | |
3880 | { | |
3881 | if (!procfs_read_status (procinfo)) | |
3882 | fprintf_unfiltered(gdb_stderr, | |
3883 | "procfs_read_status failed, errno=%d\n", | |
3884 | errno); | |
3885 | print_sys_errmsg (procinfo->pathname, errno); | |
3886 | warning ("PIOCRUN failed"); | |
3887 | } | |
3888 | #endif | |
3889 | } | |
3890 | procfs_read_status (procinfo); | |
3891 | } | |
3892 | } | |
3893 | ||
3894 | /* | |
3895 | ||
3896 | LOCAL FUNCTION | |
3897 | ||
3898 | procfs_fetch_registers -- fetch current registers from inferior | |
3899 | ||
3900 | SYNOPSIS | |
3901 | ||
3902 | void procfs_fetch_registers (int regno) | |
3903 | ||
3904 | DESCRIPTION | |
3905 | ||
3906 | Read the current values of the inferior's registers, both the | |
3907 | general register set and floating point registers (if supported) | |
3908 | and update gdb's idea of their current values. | |
3909 | ||
3910 | */ | |
3911 | ||
3912 | static void | |
3913 | procfs_fetch_registers (regno) | |
3914 | int regno; | |
3915 | { | |
3916 | struct procinfo *pi; | |
3917 | ||
3918 | pi = current_procinfo; | |
3919 | ||
3920 | #ifdef UNIXWARE | |
3921 | if (procfs_read_status (pi)) | |
3922 | { | |
3923 | supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs); | |
3924 | #if defined (FP0_REGNUM) | |
3925 | supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs); | |
3926 | #endif | |
3927 | } | |
3928 | #else /* UNIXWARE */ | |
3929 | if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1) | |
3930 | { | |
3931 | supply_gregset (&pi->gregset.gregset); | |
3932 | } | |
3933 | #if defined (FP0_REGNUM) | |
3934 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1) | |
3935 | { | |
3936 | supply_fpregset (&pi->fpregset.fpregset); | |
3937 | } | |
3938 | #endif | |
3939 | #endif /* UNIXWARE */ | |
3940 | } | |
3941 | ||
3942 | /* | |
3943 | ||
3944 | LOCAL FUNCTION | |
3945 | ||
3946 | proc_init_failed - called when /proc access initialization fails | |
3947 | fails | |
3948 | ||
3949 | SYNOPSIS | |
3950 | ||
3951 | static void proc_init_failed (struct procinfo *pi, | |
3952 | char *why, int kill_p) | |
3953 | ||
3954 | DESCRIPTION | |
3955 | ||
3956 | This function is called whenever initialization of access to a /proc | |
3957 | entry fails. It prints a suitable error message, does some cleanup, | |
3958 | and then invokes the standard error processing routine which dumps | |
3959 | us back into the command loop. If KILL_P is true, sends SIGKILL. | |
3960 | */ | |
3961 | ||
3962 | static void | |
3963 | proc_init_failed (pi, why, kill_p) | |
3964 | struct procinfo *pi; | |
3965 | char *why; | |
3966 | int kill_p; | |
3967 | { | |
3968 | print_sys_errmsg (pi->pathname, errno); | |
3969 | if (kill_p) | |
3970 | kill (pi->pid, SIGKILL); | |
3971 | close_proc_file (pi); | |
3972 | error (why); | |
3973 | /* NOTREACHED */ | |
3974 | } | |
3975 | ||
3976 | /* | |
3977 | ||
3978 | LOCAL FUNCTION | |
3979 | ||
3980 | close_proc_file - close any currently open /proc entry | |
3981 | ||
3982 | SYNOPSIS | |
3983 | ||
3984 | static void close_proc_file (struct procinfo *pip) | |
3985 | ||
3986 | DESCRIPTION | |
3987 | ||
3988 | Close any currently open /proc entry and mark the process information | |
3989 | entry as invalid. In order to ensure that we don't try to reuse any | |
3990 | stale information, the pid, fd, and pathnames are explicitly | |
3991 | invalidated, which may be overkill. | |
3992 | ||
3993 | */ | |
3994 | ||
3995 | static void | |
3996 | close_proc_file (pip) | |
3997 | struct procinfo *pip; | |
3998 | { | |
3999 | struct procinfo *procinfo; | |
4000 | ||
4001 | delete_thread (pip->pid); /* remove thread from GDB's thread list */ | |
4002 | remove_fd (pip); /* Remove fd from poll/select list */ | |
4003 | ||
4004 | close (pip->ctl_fd); | |
4005 | #ifdef HAVE_MULTIPLE_PROC_FDS | |
4006 | close (pip->as_fd); | |
4007 | close (pip->status_fd); | |
4008 | close (pip->map_fd); | |
4009 | #endif | |
4010 | ||
4011 | free (pip -> pathname); | |
4012 | ||
4013 | /* Unlink pip from the procinfo chain. Note pip might not be on the list. */ | |
4014 | ||
4015 | if (procinfo_list == pip) | |
4016 | procinfo_list = pip->next; | |
4017 | else | |
4018 | { | |
4019 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) | |
4020 | { | |
4021 | if (procinfo->next == pip) | |
4022 | { | |
4023 | procinfo->next = pip->next; | |
4024 | break; | |
4025 | } | |
4026 | } | |
4027 | free (pip); | |
4028 | } | |
4029 | } | |
4030 | ||
7a292a7a SS |
4031 | static void |
4032 | close_proc_file_cleanup (pip) | |
4033 | void *pip; | |
4034 | { | |
4035 | close_proc_file ((struct procinfo *) pip); | |
4036 | } | |
4037 | ||
4038 | static struct cleanup * | |
4039 | make_cleanup_close_proc_file (pip) | |
4040 | struct procinfo *pip; | |
4041 | { | |
4042 | return make_cleanup (close_proc_file_cleanup, pip); | |
4043 | } | |
4044 | ||
c906108c SS |
4045 | /* |
4046 | ||
4047 | LOCAL FUNCTION | |
4048 | ||
4049 | open_proc_file - open a /proc entry for a given process id | |
4050 | ||
4051 | SYNOPSIS | |
4052 | ||
4053 | static int open_proc_file (int pid, struct procinfo *pip, int mode) | |
4054 | ||
4055 | DESCRIPTION | |
4056 | ||
4057 | Given a process id and a mode, close the existing open /proc | |
4058 | entry (if any) and open one for the new process id, in the | |
4059 | specified mode. Once it is open, then mark the local process | |
4060 | information structure as valid, which guarantees that the pid, | |
4061 | fd, and pathname fields match an open /proc entry. Returns | |
4062 | zero if the open fails, nonzero otherwise. | |
4063 | ||
4064 | Note that the pathname is left intact, even when the open fails, | |
4065 | so that callers can use it to construct meaningful error messages | |
4066 | rather than just "file open failed". | |
4067 | ||
4068 | Note that for Solaris, the process-id also includes an LWP-id, so we | |
4069 | actually attempt to open that. If we are handed a pid with a 0 LWP-id, | |
4070 | then we will ask the kernel what it is and add it to the pid. Hence, | |
4071 | the pid can be changed by us. | |
4072 | */ | |
4073 | ||
4074 | static int | |
4075 | open_proc_file (pid, pip, mode, control) | |
4076 | int pid; | |
4077 | struct procinfo *pip; | |
4078 | int mode; | |
4079 | int control; | |
4080 | { | |
4081 | int tmp, tmpfd; | |
4082 | ||
4083 | pip -> next = NULL; | |
4084 | pip -> had_event = 0; | |
4085 | pip -> pathname = xmalloc (MAX_PROC_NAME_SIZE); | |
4086 | pip -> pid = pid; | |
4087 | ||
4088 | #ifndef PIOCOPENLWP | |
4089 | tmp = pid; | |
4090 | #else | |
4091 | tmp = pid & 0xffff; | |
4092 | #endif | |
4093 | ||
4094 | #ifdef HAVE_MULTIPLE_PROC_FDS | |
4095 | sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp); | |
4096 | if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0) | |
4097 | { | |
4098 | return 0; | |
4099 | } | |
4100 | ||
4101 | sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp); | |
4102 | if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0) | |
4103 | { | |
4104 | close (pip->status_fd); | |
4105 | return 0; | |
4106 | } | |
4107 | ||
4108 | sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp); | |
4109 | if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0) | |
4110 | { | |
4111 | close (pip->status_fd); | |
4112 | close (pip->as_fd); | |
4113 | return 0; | |
4114 | } | |
4115 | ||
4116 | if (control) | |
4117 | { | |
4118 | sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp); | |
4119 | if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0) | |
4120 | { | |
4121 | close (pip->status_fd); | |
4122 | close (pip->as_fd); | |
4123 | close (pip->map_fd); | |
4124 | return 0; | |
4125 | } | |
4126 | } | |
4127 | ||
4128 | #else /* HAVE_MULTIPLE_PROC_FDS */ | |
4129 | sprintf (pip -> pathname, CTL_PROC_NAME_FMT, tmp); | |
4130 | ||
4131 | if ((tmpfd = open (pip -> pathname, mode)) < 0) | |
4132 | return 0; | |
4133 | ||
4134 | #ifndef PIOCOPENLWP | |
4135 | pip -> ctl_fd = tmpfd; | |
4136 | pip -> as_fd = tmpfd; | |
4137 | pip -> map_fd = tmpfd; | |
4138 | pip -> status_fd = tmpfd; | |
4139 | #else | |
4140 | tmp = (pid >> 16) & 0xffff; /* Extract thread id */ | |
4141 | ||
4142 | if (tmp == 0) | |
4143 | { /* Don't know thread id yet */ | |
4144 | if (ioctl (tmpfd, PIOCSTATUS, &pip -> prstatus) < 0) | |
4145 | { | |
4146 | print_sys_errmsg (pip -> pathname, errno); | |
4147 | close (tmpfd); | |
4148 | error ("open_proc_file: PIOCSTATUS failed"); | |
4149 | } | |
4150 | ||
4151 | tmp = pip -> prstatus.pr_who; /* Get thread id from prstatus_t */ | |
4152 | pip -> pid = (tmp << 16) | pid; /* Update pip */ | |
4153 | } | |
4154 | ||
4155 | if ((pip -> ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0) | |
4156 | { | |
4157 | close (tmpfd); | |
4158 | return 0; | |
4159 | } | |
4160 | ||
4161 | #ifdef PIOCSET /* New method */ | |
4162 | { | |
4163 | long pr_flags; | |
4164 | pr_flags = PR_ASYNC; | |
4165 | ioctl (pip -> ctl_fd, PIOCSET, &pr_flags); | |
4166 | } | |
4167 | #endif | |
4168 | ||
4169 | /* keep extra fds in sync */ | |
4170 | pip->as_fd = pip->ctl_fd; | |
4171 | pip->map_fd = pip->ctl_fd; | |
4172 | pip->status_fd = pip->ctl_fd; | |
4173 | ||
4174 | close (tmpfd); /* All done with main pid */ | |
4175 | #endif /* PIOCOPENLWP */ | |
4176 | ||
4177 | #endif /* HAVE_MULTIPLE_PROC_FDS */ | |
4178 | ||
4179 | return 1; | |
4180 | } | |
4181 | ||
4182 | static char * | |
4183 | mappingflags (flags) | |
4184 | long flags; | |
4185 | { | |
4186 | static char asciiflags[8]; | |
4187 | ||
4188 | strcpy (asciiflags, "-------"); | |
4189 | #if defined (MA_PHYS) | |
4190 | if (flags & MA_PHYS) asciiflags[0] = 'd'; | |
4191 | #endif | |
4192 | if (flags & MA_STACK) asciiflags[1] = 's'; | |
4193 | if (flags & MA_BREAK) asciiflags[2] = 'b'; | |
4194 | if (flags & MA_SHARED) asciiflags[3] = 's'; | |
4195 | if (flags & MA_READ) asciiflags[4] = 'r'; | |
4196 | if (flags & MA_WRITE) asciiflags[5] = 'w'; | |
4197 | if (flags & MA_EXEC) asciiflags[6] = 'x'; | |
4198 | return (asciiflags); | |
4199 | } | |
4200 | ||
4201 | static void | |
4202 | info_proc_flags (pip, summary) | |
4203 | struct procinfo *pip; | |
4204 | int summary; | |
4205 | { | |
4206 | struct trans *transp; | |
4207 | #ifdef UNIXWARE | |
4208 | long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags; | |
4209 | #else | |
4210 | long flags = pip->prstatus.pr_flags; | |
4211 | #endif | |
4212 | ||
4213 | printf_filtered ("%-32s", "Process status flags:"); | |
4214 | if (!summary) | |
4215 | { | |
4216 | printf_filtered ("\n\n"); | |
4217 | } | |
4218 | for (transp = pr_flag_table; transp -> name != NULL; transp++) | |
4219 | { | |
4220 | if (flags & transp -> value) | |
4221 | { | |
4222 | if (summary) | |
4223 | { | |
4224 | printf_filtered ("%s ", transp -> name); | |
4225 | } | |
4226 | else | |
4227 | { | |
4228 | printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc); | |
4229 | } | |
4230 | } | |
4231 | } | |
4232 | printf_filtered ("\n"); | |
4233 | } | |
4234 | ||
4235 | static void | |
4236 | info_proc_stop (pip, summary) | |
4237 | struct procinfo *pip; | |
4238 | int summary; | |
4239 | { | |
4240 | struct trans *transp; | |
4241 | int why; | |
4242 | int what; | |
4243 | ||
4244 | why = THE_PR_LWP(pip->prstatus).pr_why; | |
4245 | what = THE_PR_LWP(pip->prstatus).pr_what; | |
4246 | ||
4247 | if (THE_PR_LWP(pip->prstatus).pr_flags & PR_STOPPED) | |
4248 | { | |
4249 | printf_filtered ("%-32s", "Reason for stopping:"); | |
4250 | if (!summary) | |
4251 | { | |
4252 | printf_filtered ("\n\n"); | |
4253 | } | |
4254 | for (transp = pr_why_table; transp -> name != NULL; transp++) | |
4255 | { | |
4256 | if (why == transp -> value) | |
4257 | { | |
4258 | if (summary) | |
4259 | { | |
4260 | printf_filtered ("%s ", transp -> name); | |
4261 | } | |
4262 | else | |
4263 | { | |
4264 | printf_filtered ("\t%-16s %s.\n", | |
4265 | transp -> name, transp -> desc); | |
4266 | } | |
4267 | break; | |
4268 | } | |
4269 | } | |
4270 | ||
4271 | /* Use the pr_why field to determine what the pr_what field means, and | |
4272 | print more information. */ | |
4273 | ||
4274 | switch (why) | |
4275 | { | |
4276 | case PR_REQUESTED: | |
4277 | /* pr_what is unused for this case */ | |
4278 | break; | |
4279 | case PR_JOBCONTROL: | |
4280 | case PR_SIGNALLED: | |
4281 | if (summary) | |
4282 | { | |
4283 | printf_filtered ("%s ", signalname (what)); | |
4284 | } | |
4285 | else | |
4286 | { | |
4287 | printf_filtered ("\t%-16s %s.\n", signalname (what), | |
4288 | safe_strsignal (what)); | |
4289 | } | |
4290 | break; | |
4291 | case PR_SYSENTRY: | |
4292 | if (summary) | |
4293 | { | |
4294 | printf_filtered ("%s ", syscallname (what)); | |
4295 | } | |
4296 | else | |
4297 | { | |
4298 | printf_filtered ("\t%-16s %s.\n", syscallname (what), | |
4299 | "Entered this system call"); | |
4300 | } | |
4301 | break; | |
4302 | case PR_SYSEXIT: | |
4303 | if (summary) | |
4304 | { | |
4305 | printf_filtered ("%s ", syscallname (what)); | |
4306 | } | |
4307 | else | |
4308 | { | |
4309 | printf_filtered ("\t%-16s %s.\n", syscallname (what), | |
4310 | "Returned from this system call"); | |
4311 | } | |
4312 | break; | |
4313 | case PR_FAULTED: | |
4314 | if (summary) | |
4315 | { | |
4316 | printf_filtered ("%s ", | |
4317 | lookupname (faults_table, what, "fault")); | |
4318 | } | |
4319 | else | |
4320 | { | |
4321 | printf_filtered ("\t%-16s %s.\n", | |
4322 | lookupname (faults_table, what, "fault"), | |
4323 | lookupdesc (faults_table, what)); | |
4324 | } | |
4325 | break; | |
4326 | } | |
4327 | printf_filtered ("\n"); | |
4328 | } | |
4329 | } | |
4330 | ||
4331 | static void | |
4332 | info_proc_siginfo (pip, summary) | |
4333 | struct procinfo *pip; | |
4334 | int summary; | |
4335 | { | |
4336 | struct siginfo *sip; | |
4337 | ||
4338 | if ((THE_PR_LWP(pip->prstatus).pr_flags & PR_STOPPED) && | |
4339 | (THE_PR_LWP(pip->prstatus).pr_why == PR_SIGNALLED || | |
4340 | THE_PR_LWP(pip->prstatus).pr_why == PR_FAULTED)) | |
4341 | { | |
4342 | printf_filtered ("%-32s", "Additional signal/fault info:"); | |
4343 | sip = &(THE_PR_LWP(pip->prstatus).pr_info); | |
4344 | if (summary) | |
4345 | { | |
4346 | printf_filtered ("%s ", signalname (sip -> si_signo)); | |
4347 | if (sip -> si_errno > 0) | |
4348 | { | |
4349 | printf_filtered ("%s ", errnoname (sip -> si_errno)); | |
4350 | } | |
4351 | if (sip -> si_code <= 0) | |
4352 | { | |
4353 | printf_filtered ("sent by %s, uid %d ", | |
4354 | target_pid_to_str (sip -> si_pid), | |
4355 | sip -> si_uid); | |
4356 | } | |
4357 | else | |
4358 | { | |
4359 | printf_filtered ("%s ", sigcodename (sip)); | |
4360 | if ((sip -> si_signo == SIGILL) || | |
4361 | (sip -> si_signo == SIGFPE) || | |
4362 | (sip -> si_signo == SIGSEGV) || | |
4363 | (sip -> si_signo == SIGBUS)) | |
4364 | { | |
4365 | printf_filtered ("addr=%#lx ", | |
4366 | (unsigned long) sip -> si_addr); | |
4367 | } | |
4368 | else if ((sip -> si_signo == SIGCHLD)) | |
4369 | { | |
4370 | printf_filtered ("child %s, status %u ", | |
4371 | target_pid_to_str (sip -> si_pid), | |
4372 | sip -> si_status); | |
4373 | } | |
4374 | else if ((sip -> si_signo == SIGPOLL)) | |
4375 | { | |
4376 | printf_filtered ("band %u ", sip -> si_band); | |
4377 | } | |
4378 | } | |
4379 | } | |
4380 | else | |
4381 | { | |
4382 | printf_filtered ("\n\n"); | |
4383 | printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo), | |
4384 | safe_strsignal (sip -> si_signo)); | |
4385 | if (sip -> si_errno > 0) | |
4386 | { | |
4387 | printf_filtered ("\t%-16s %s.\n", | |
4388 | errnoname (sip -> si_errno), | |
4389 | safe_strerror (sip -> si_errno)); | |
4390 | } | |
4391 | if (sip -> si_code <= 0) | |
4392 | { | |
4393 | printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */ | |
4394 | "PID of process sending signal"); | |
4395 | printf_filtered ("\t%-16u %s\n", sip -> si_uid, | |
4396 | "UID of process sending signal"); | |
4397 | } | |
4398 | else | |
4399 | { | |
4400 | printf_filtered ("\t%-16s %s.\n", sigcodename (sip), | |
4401 | sigcodedesc (sip)); | |
4402 | if ((sip -> si_signo == SIGILL) || | |
4403 | (sip -> si_signo == SIGFPE)) | |
4404 | { | |
4405 | printf_filtered ("\t%#-16lx %s.\n", | |
4406 | (unsigned long) sip -> si_addr, | |
4407 | "Address of faulting instruction"); | |
4408 | } | |
4409 | else if ((sip -> si_signo == SIGSEGV) || | |
4410 | (sip -> si_signo == SIGBUS)) | |
4411 | { | |
4412 | printf_filtered ("\t%#-16lx %s.\n", | |
4413 | (unsigned long) sip -> si_addr, | |
4414 | "Address of faulting memory reference"); | |
4415 | } | |
4416 | else if ((sip -> si_signo == SIGCHLD)) | |
4417 | { | |
4418 | printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */ | |
4419 | "Child process ID"); | |
4420 | printf_filtered ("\t%-16u %s.\n", sip -> si_status, | |
4421 | "Child process exit value or signal"); | |
4422 | } | |
4423 | else if ((sip -> si_signo == SIGPOLL)) | |
4424 | { | |
4425 | printf_filtered ("\t%-16u %s.\n", sip -> si_band, | |
4426 | "Band event for POLL_{IN,OUT,MSG}"); | |
4427 | } | |
4428 | } | |
4429 | } | |
4430 | printf_filtered ("\n"); | |
4431 | } | |
4432 | } | |
4433 | ||
4434 | static void | |
4435 | info_proc_syscalls (pip, summary) | |
4436 | struct procinfo *pip; | |
4437 | int summary; | |
4438 | { | |
4439 | int syscallnum; | |
4440 | ||
4441 | if (!summary) | |
4442 | { | |
4443 | ||
4444 | #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */ | |
4445 | if (pip -> prstatus.pr_flags & PR_ASLEEP) | |
4446 | { | |
4447 | int syscallnum = pip -> prstatus.pr_reg[R_D0]; | |
4448 | if (summary) | |
4449 | { | |
4450 | printf_filtered ("%-32s", "Sleeping in system call:"); | |
4451 | printf_filtered ("%s", syscallname (syscallnum)); | |
4452 | } | |
4453 | else | |
4454 | { | |
4455 | printf_filtered ("Sleeping in system call '%s'.\n", | |
4456 | syscallname (syscallnum)); | |
4457 | } | |
4458 | } | |
4459 | #endif | |
4460 | ||
4461 | #ifndef UNIXWARE | |
4462 | if (ioctl (pip -> ctl_fd, PIOCGENTRY, &pip -> entryset) < 0) | |
4463 | { | |
4464 | print_sys_errmsg (pip -> pathname, errno); | |
4465 | error ("PIOCGENTRY failed"); | |
4466 | } | |
4467 | ||
4468 | if (ioctl (pip -> ctl_fd, PIOCGEXIT, &pip -> exitset) < 0) | |
4469 | { | |
4470 | print_sys_errmsg (pip -> pathname, errno); | |
4471 | error ("PIOCGEXIT failed"); | |
4472 | } | |
4473 | #endif | |
4474 | ||
4475 | printf_filtered ("System call tracing information:\n\n"); | |
4476 | ||
4477 | printf_filtered ("\t%-12s %-8s %-8s\n", | |
4478 | "System call", | |
4479 | "Entry", | |
4480 | "Exit"); | |
4481 | for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++) | |
4482 | { | |
4483 | QUIT; | |
4484 | if (syscall_table[syscallnum] != NULL) | |
4485 | printf_filtered ("\t%-12s ", syscall_table[syscallnum]); | |
4486 | else | |
4487 | printf_filtered ("\t%-12d ", syscallnum); | |
4488 | ||
4489 | #ifdef UNIXWARE | |
4490 | printf_filtered ("%-8s ", | |
4491 | prismember (&pip->prstatus.pr_sysentry, syscallnum) | |
4492 | ? "on" : "off"); | |
4493 | printf_filtered ("%-8s ", | |
4494 | prismember (&pip->prstatus.pr_sysexit, syscallnum) | |
4495 | ? "on" : "off"); | |
4496 | #else | |
4497 | printf_filtered ("%-8s ", | |
4498 | prismember (&pip -> entryset, syscallnum) | |
4499 | ? "on" : "off"); | |
4500 | printf_filtered ("%-8s ", | |
4501 | prismember (&pip -> exitset, syscallnum) | |
4502 | ? "on" : "off"); | |
4503 | #endif | |
4504 | printf_filtered ("\n"); | |
4505 | } | |
4506 | printf_filtered ("\n"); | |
4507 | } | |
4508 | } | |
4509 | ||
4510 | static char * | |
4511 | signalname (signo) | |
4512 | int signo; | |
4513 | { | |
4514 | const char *name; | |
4515 | static char locbuf[32]; | |
4516 | ||
4517 | name = strsigno (signo); | |
4518 | if (name == NULL) | |
4519 | { | |
4520 | sprintf (locbuf, "Signal %d", signo); | |
4521 | } | |
4522 | else | |
4523 | { | |
4524 | sprintf (locbuf, "%s (%d)", name, signo); | |
4525 | } | |
4526 | return (locbuf); | |
4527 | } | |
4528 | ||
4529 | static char * | |
4530 | errnoname (errnum) | |
4531 | int errnum; | |
4532 | { | |
4533 | const char *name; | |
4534 | static char locbuf[32]; | |
4535 | ||
4536 | name = strerrno (errnum); | |
4537 | if (name == NULL) | |
4538 | { | |
4539 | sprintf (locbuf, "Errno %d", errnum); | |
4540 | } | |
4541 | else | |
4542 | { | |
4543 | sprintf (locbuf, "%s (%d)", name, errnum); | |
4544 | } | |
4545 | return (locbuf); | |
4546 | } | |
4547 | ||
4548 | static void | |
4549 | info_proc_signals (pip, summary) | |
4550 | struct procinfo *pip; | |
4551 | int summary; | |
4552 | { | |
4553 | int signo; | |
4554 | ||
4555 | if (!summary) | |
4556 | { | |
4557 | #ifndef PROCFS_USE_READ_WRITE | |
4558 | if (ioctl (pip -> ctl_fd, PIOCGTRACE, &pip -> trace) < 0) | |
4559 | { | |
4560 | print_sys_errmsg (pip -> pathname, errno); | |
4561 | error ("PIOCGTRACE failed"); | |
4562 | } | |
4563 | #endif | |
4564 | ||
4565 | printf_filtered ("Disposition of signals:\n\n"); | |
4566 | printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n", | |
4567 | "Signal", "Trace", "Hold", "Pending", "Description"); | |
4568 | for (signo = 0; signo < NSIG; signo++) | |
4569 | { | |
4570 | QUIT; | |
4571 | printf_filtered ("\t%-15s ", signalname (signo)); | |
4572 | #ifdef UNIXWARE | |
4573 | printf_filtered ("%-8s ", | |
4574 | prismember (&pip -> prstatus.pr_sigtrace, signo) | |
4575 | ? "on" : "off"); | |
4576 | printf_filtered ("%-8s ", | |
4577 | prismember (&pip -> prstatus.pr_lwp.pr_context.uc_sigmask, signo) | |
4578 | ? "on" : "off"); | |
4579 | #else | |
4580 | printf_filtered ("%-8s ", | |
4581 | prismember (&pip -> trace, signo) | |
4582 | ? "on" : "off"); | |
4583 | printf_filtered ("%-8s ", | |
4584 | prismember (&pip -> prstatus.pr_sighold, signo) | |
4585 | ? "on" : "off"); | |
4586 | #endif | |
4587 | ||
4588 | #ifdef UNIXWARE | |
4589 | if (prismember (&pip->prstatus.pr_sigpend, signo) || | |
4590 | prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo)) | |
4591 | printf_filtered("%-8s ", "yes"); | |
4592 | else | |
4593 | printf_filtered("%-8s ", "no"); | |
4594 | #else /* UNIXWARE */ | |
4595 | #ifdef PROCFS_SIGPEND_OFFSET | |
4596 | /* Alpha OSF/1 numbers the pending signals from 1. */ | |
4597 | printf_filtered ("%-8s ", | |
4598 | (signo ? prismember (&pip -> prstatus.pr_sigpend, | |
4599 | signo - 1) | |
4600 | : 0) | |
4601 | ? "yes" : "no"); | |
4602 | #else | |
4603 | printf_filtered ("%-8s ", | |
4604 | prismember (&pip -> prstatus.pr_sigpend, signo) | |
4605 | ? "yes" : "no"); | |
4606 | #endif | |
4607 | #endif /* UNIXWARE */ | |
4608 | printf_filtered (" %s\n", safe_strsignal (signo)); | |
4609 | } | |
4610 | printf_filtered ("\n"); | |
4611 | } | |
4612 | } | |
4613 | ||
4614 | static void | |
4615 | info_proc_faults (pip, summary) | |
4616 | struct procinfo *pip; | |
4617 | int summary; | |
4618 | { | |
4619 | struct trans *transp; | |
4620 | ||
4621 | if (!summary) | |
4622 | { | |
4623 | #ifndef UNIXWARE | |
4624 | if (ioctl (pip -> ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0) | |
4625 | { | |
4626 | print_sys_errmsg (pip -> pathname, errno); | |
4627 | error ("PIOCGFAULT failed"); | |
4628 | } | |
4629 | #endif | |
4630 | ||
4631 | printf_filtered ("Current traced hardware fault set:\n\n"); | |
4632 | printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace"); | |
4633 | ||
4634 | for (transp = faults_table; transp -> name != NULL; transp++) | |
4635 | { | |
4636 | QUIT; | |
4637 | printf_filtered ("\t%-12s ", transp -> name); | |
4638 | #ifdef UNIXWARE | |
4639 | printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp -> value) | |
4640 | ? "on" : "off"); | |
4641 | #else | |
4642 | printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp -> value) | |
4643 | ? "on" : "off"); | |
4644 | #endif | |
4645 | printf_filtered ("\n"); | |
4646 | } | |
4647 | printf_filtered ("\n"); | |
4648 | } | |
4649 | } | |
4650 | ||
4651 | static void | |
4652 | info_proc_mappings (pip, summary) | |
4653 | struct procinfo *pip; | |
4654 | int summary; | |
4655 | { | |
4656 | int nmap; | |
4657 | struct prmap *prmaps; | |
4658 | struct prmap *prmap; | |
4659 | struct stat sbuf; | |
4660 | ||
4661 | if (!summary) | |
4662 | { | |
4663 | printf_filtered ("Mapped address spaces:\n\n"); | |
4664 | #ifdef BFD_HOST_64_BIT | |
4665 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
4666 | #else | |
4667 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", | |
4668 | #endif | |
4669 | "Start Addr", | |
4670 | " End Addr", | |
4671 | " Size", | |
4672 | " Offset", | |
4673 | "Flags"); | |
4674 | #ifdef PROCFS_USE_READ_WRITE | |
4675 | if (fstat (pip->map_fd, &sbuf) == 0) | |
4676 | { | |
4677 | nmap = sbuf.st_size / sizeof (prmap_t); | |
4678 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
4679 | if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) && | |
4680 | (read (pip->map_fd, (char *) prmaps, | |
4681 | nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps)))) | |
4682 | { | |
4683 | int i = 0; | |
4684 | for (prmap = prmaps; i < nmap; ++prmap, ++i) | |
4685 | #else | |
4686 | if (ioctl (pip -> ctl_fd, PIOCNMAP, &nmap) == 0) | |
4687 | { | |
4688 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
4689 | if (ioctl (pip -> ctl_fd, PIOCMAP, prmaps) == 0) | |
4690 | { | |
4691 | for (prmap = prmaps; prmap -> pr_size; ++prmap) | |
4692 | #endif /* PROCFS_USE_READ_WRITE */ | |
4693 | { | |
4694 | #ifdef BFD_HOST_64_BIT | |
4695 | printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n", | |
4696 | #else | |
4697 | printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n", | |
4698 | #endif | |
4699 | (unsigned long)prmap -> pr_vaddr, | |
4700 | (unsigned long)prmap -> pr_vaddr | |
4701 | + prmap -> pr_size - 1, | |
4702 | prmap -> pr_size, | |
4703 | prmap -> pr_off, | |
4704 | mappingflags (prmap -> pr_mflags)); | |
4705 | } | |
4706 | } | |
4707 | } | |
4708 | printf_filtered ("\n"); | |
4709 | } | |
4710 | } | |
4711 | ||
4712 | /* | |
4713 | ||
4714 | LOCAL FUNCTION | |
4715 | ||
4716 | info_proc -- implement the "info proc" command | |
4717 | ||
4718 | SYNOPSIS | |
4719 | ||
4720 | void info_proc (char *args, int from_tty) | |
4721 | ||
4722 | DESCRIPTION | |
4723 | ||
4724 | Implement gdb's "info proc" command by using the /proc interface | |
4725 | to print status information about any currently running process. | |
4726 | ||
4727 | Examples of the use of "info proc" are: | |
4728 | ||
4729 | info proc (prints summary info for current inferior) | |
4730 | info proc 123 (prints summary info for process with pid 123) | |
4731 | info proc mappings (prints address mappings) | |
4732 | info proc times (prints process/children times) | |
4733 | info proc id (prints pid, ppid, gid, sid, etc) | |
4734 | FIXME: i proc id not implemented. | |
4735 | info proc status (prints general process state info) | |
4736 | FIXME: i proc status not implemented. | |
4737 | info proc signals (prints info about signal handling) | |
4738 | info proc all (prints all info) | |
4739 | ||
4740 | */ | |
4741 | ||
4742 | static void | |
4743 | info_proc (args, from_tty) | |
4744 | char *args; | |
4745 | int from_tty; | |
4746 | { | |
4747 | int pid; | |
4748 | struct procinfo *pip; | |
4749 | struct cleanup *old_chain; | |
4750 | char **argv; | |
4751 | int argsize; | |
4752 | int summary = 1; | |
4753 | int flags = 0; | |
4754 | int syscalls = 0; | |
4755 | int signals = 0; | |
4756 | int faults = 0; | |
4757 | int mappings = 0; | |
4758 | int times = 0; | |
4759 | int id = 0; | |
4760 | int status = 0; | |
4761 | int all = 0; | |
4762 | int nlwp; | |
4763 | int *lwps; | |
4764 | ||
4765 | old_chain = make_cleanup (null_cleanup, 0); | |
4766 | ||
4767 | /* Default to using the current inferior if no pid specified. Note | |
4768 | that inferior_pid may be 0, hence we set okerr. */ | |
4769 | ||
4770 | pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */ | |
4771 | if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */ | |
4772 | pip = procinfo_list; /* take first available */ | |
4773 | pid = pid & 0xffff; /* extract "real" pid */ | |
4774 | ||
4775 | if (args != NULL) | |
4776 | { | |
4777 | if ((argv = buildargv (args)) == NULL) | |
4778 | { | |
4779 | nomem (0); | |
4780 | } | |
7a292a7a | 4781 | make_cleanup_freeargv (argv); |
c906108c SS |
4782 | |
4783 | while (*argv != NULL) | |
4784 | { | |
4785 | argsize = strlen (*argv); | |
4786 | if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0) | |
4787 | { | |
4788 | summary = 0; | |
4789 | all = 1; | |
4790 | } | |
4791 | else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0) | |
4792 | { | |
4793 | summary = 0; | |
4794 | faults = 1; | |
4795 | } | |
4796 | else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0) | |
4797 | { | |
4798 | summary = 0; | |
4799 | flags = 1; | |
4800 | } | |
4801 | else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0) | |
4802 | { | |
4803 | summary = 0; | |
4804 | id = 1; | |
4805 | } | |
4806 | else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0) | |
4807 | { | |
4808 | summary = 0; | |
4809 | mappings = 1; | |
4810 | } | |
4811 | else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0) | |
4812 | { | |
4813 | summary = 0; | |
4814 | signals = 1; | |
4815 | } | |
4816 | else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0) | |
4817 | { | |
4818 | summary = 0; | |
4819 | status = 1; | |
4820 | } | |
4821 | else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0) | |
4822 | { | |
4823 | summary = 0; | |
4824 | syscalls = 1; | |
4825 | } | |
4826 | else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0) | |
4827 | { | |
4828 | summary = 0; | |
4829 | times = 1; | |
4830 | } | |
4831 | else if ((pid = atoi (*argv)) > 0) | |
4832 | { | |
4833 | pip = (struct procinfo *) xmalloc (sizeof (struct procinfo)); | |
4834 | memset (pip, 0, sizeof (*pip)); | |
4835 | ||
4836 | pip->pid = pid; | |
4837 | if (!open_proc_file (pid, pip, O_RDONLY, 0)) | |
4838 | { | |
4839 | perror_with_name (pip -> pathname); | |
4840 | /* NOTREACHED */ | |
4841 | } | |
4842 | pid = pip->pid; | |
7a292a7a | 4843 | make_cleanup_close_proc_file (pip); |
c906108c SS |
4844 | } |
4845 | else if (**argv != '\000') | |
4846 | { | |
4847 | error ("Unrecognized or ambiguous keyword `%s'.", *argv); | |
4848 | } | |
4849 | argv++; | |
4850 | } | |
4851 | } | |
4852 | ||
4853 | /* If we don't have a valid open process at this point, then we have no | |
4854 | inferior or didn't specify a specific pid. */ | |
4855 | ||
4856 | if (!pip) | |
4857 | { | |
4858 | error ("\ | |
4859 | No process. Start debugging a program or specify an explicit process ID."); | |
4860 | } | |
4861 | ||
4862 | if (!procfs_read_status (pip)) | |
4863 | { | |
4864 | print_sys_errmsg (pip -> pathname, errno); | |
4865 | error ("procfs_read_status failed"); | |
4866 | } | |
4867 | ||
4868 | #ifndef PROCFS_USE_READ_WRITE | |
4869 | #ifdef PIOCLWPIDS | |
4870 | nlwp = pip->prstatus.pr_nlwp; | |
4871 | lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps)); | |
4872 | ||
4873 | if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps)) | |
4874 | { | |
4875 | print_sys_errmsg (pip -> pathname, errno); | |
4876 | error ("PIOCLWPIDS failed"); | |
4877 | } | |
4878 | #else /* PIOCLWPIDS */ | |
4879 | nlwp = 1; | |
4880 | lwps = alloca ((2 * nlwp + 2) * sizeof *lwps); | |
4881 | lwps[0] = 0; | |
4882 | #endif /* PIOCLWPIDS */ | |
4883 | ||
4884 | for (; nlwp > 0; nlwp--, lwps++) | |
4885 | { | |
4886 | pip = find_procinfo ((*lwps << 16) | pid, 1); | |
4887 | ||
4888 | if (!pip) | |
4889 | { | |
4890 | pip = (struct procinfo *) xmalloc (sizeof (struct procinfo)); | |
4891 | memset (pip, 0, sizeof (*pip)); | |
4892 | if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0)) | |
4893 | continue; | |
4894 | ||
7a292a7a | 4895 | make_cleanup_close_proc_file (pip); |
c906108c SS |
4896 | |
4897 | if (!procfs_read_status (pip)) | |
4898 | { | |
4899 | print_sys_errmsg (pip -> pathname, errno); | |
4900 | error ("procfs_read_status failed"); | |
4901 | } | |
4902 | } | |
4903 | ||
4904 | #endif /* PROCFS_USE_READ_WRITE */ | |
4905 | ||
4906 | /* Print verbose information of the requested type(s), or just a summary | |
4907 | of the information for all types. */ | |
4908 | ||
4909 | printf_filtered ("\nInformation for %s.%d:\n\n", pip -> pathname, *lwps); | |
4910 | if (summary || all || flags) | |
4911 | { | |
4912 | info_proc_flags (pip, summary); | |
4913 | } | |
4914 | if (summary || all) | |
4915 | { | |
4916 | info_proc_stop (pip, summary); | |
4917 | #ifdef UNIXWARE | |
4918 | supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs); | |
4919 | #else | |
4920 | supply_gregset (&pip->prstatus.pr_reg); | |
4921 | #endif | |
4922 | printf_filtered ("PC: "); | |
4923 | print_address (read_pc (), gdb_stdout); | |
4924 | printf_filtered ("\n"); | |
4925 | } | |
4926 | if (summary || all || signals || faults) | |
4927 | { | |
4928 | info_proc_siginfo (pip, summary); | |
4929 | } | |
4930 | if (summary || all || syscalls) | |
4931 | { | |
4932 | info_proc_syscalls (pip, summary); | |
4933 | } | |
4934 | if (summary || all || mappings) | |
4935 | { | |
4936 | info_proc_mappings (pip, summary); | |
4937 | } | |
4938 | if (summary || all || signals) | |
4939 | { | |
4940 | info_proc_signals (pip, summary); | |
4941 | } | |
4942 | if (summary || all || faults) | |
4943 | { | |
4944 | info_proc_faults (pip, summary); | |
4945 | } | |
4946 | printf_filtered ("\n"); | |
4947 | ||
4948 | /* All done, deal with closing any temporary process info structure, | |
4949 | freeing temporary memory , etc. */ | |
4950 | ||
4951 | do_cleanups (old_chain); | |
4952 | #ifndef PROCFS_USE_READ_WRITE | |
4953 | } | |
4954 | #endif | |
4955 | } | |
4956 | ||
4957 | /* | |
4958 | ||
4959 | LOCAL FUNCTION | |
4960 | ||
4961 | modify_inherit_on_fork_flag - Change the inherit-on-fork flag | |
4962 | ||
4963 | SYNOPSIS | |
4964 | ||
4965 | void modify_inherit_on_fork_flag (fd, flag) | |
4966 | ||
4967 | DESCRIPTION | |
4968 | ||
4969 | Call this routine to modify the inherit-on-fork flag. This routine is | |
4970 | just a nice wrapper to hide the #ifdefs needed by various systems to | |
4971 | control this flag. | |
4972 | ||
4973 | */ | |
4974 | ||
4975 | static void | |
4976 | modify_inherit_on_fork_flag (fd, flag) | |
4977 | int fd; | |
4978 | int flag; | |
4979 | { | |
4980 | #if defined (PIOCSET) || defined (PCSET) | |
4981 | long pr_flags; | |
4982 | #endif | |
4983 | int retval = 0; | |
4984 | struct proc_ctl pctl; | |
4985 | ||
4986 | #if defined (PIOCSET) || defined (PCSET) /* New method */ | |
4987 | pr_flags = PR_FORK; | |
4988 | if (flag) | |
4989 | { | |
4990 | #ifdef PROCFS_USE_READ_WRITE | |
4991 | pctl.cmd = PCSET; | |
4992 | pctl.data = PR_FORK; | |
4993 | if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) | |
4994 | retval = -1; | |
4995 | #else | |
4996 | retval = ioctl (fd, PIOCSET, &pr_flags); | |
4997 | #endif | |
4998 | } | |
4999 | else | |
5000 | { | |
5001 | #ifdef PROCFS_USE_READ_WRITE | |
5002 | pctl.cmd = PCRESET; | |
5003 | pctl.data = PR_FORK; | |
5004 | if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) | |
5005 | retval = -1; | |
5006 | #else | |
5007 | retval = ioctl (fd, PIOCRESET, &pr_flags); | |
5008 | #endif | |
5009 | } | |
5010 | ||
5011 | #else | |
5012 | #ifdef PIOCSFORK /* Original method */ | |
5013 | if (flag) | |
5014 | { | |
5015 | retval = ioctl (fd, PIOCSFORK, NULL); | |
5016 | } | |
5017 | else | |
5018 | { | |
5019 | retval = ioctl (fd, PIOCRFORK, NULL); | |
5020 | } | |
5021 | #else | |
5022 | Neither PR_FORK nor PIOCSFORK exist!!! | |
5023 | #endif | |
5024 | #endif | |
5025 | ||
5026 | if (!retval) | |
5027 | return; | |
5028 | ||
5029 | print_sys_errmsg ("modify_inherit_on_fork_flag", errno); | |
5030 | error ("PIOCSFORK or PR_FORK modification failed"); | |
5031 | } | |
5032 | ||
5033 | /* | |
5034 | ||
5035 | LOCAL FUNCTION | |
5036 | ||
5037 | modify_run_on_last_close_flag - Change the run-on-last-close flag | |
5038 | ||
5039 | SYNOPSIS | |
5040 | ||
5041 | void modify_run_on_last_close_flag (fd, flag) | |
5042 | ||
5043 | DESCRIPTION | |
5044 | ||
5045 | Call this routine to modify the run-on-last-close flag. This routine | |
5046 | is just a nice wrapper to hide the #ifdefs needed by various systems to | |
5047 | control this flag. | |
5048 | ||
5049 | */ | |
5050 | ||
5051 | static void | |
5052 | modify_run_on_last_close_flag (fd, flag) | |
5053 | int fd; | |
5054 | int flag; | |
5055 | { | |
5056 | #if defined (PIOCSET) || defined (PCSET) | |
5057 | long pr_flags; | |
5058 | #endif | |
5059 | int retval = 0; | |
5060 | struct proc_ctl pctl; | |
5061 | ||
5062 | #if defined (PIOCSET) || defined (PCSET) /* New method */ | |
5063 | pr_flags = PR_RLC; | |
5064 | if (flag) | |
5065 | { | |
5066 | #ifdef PROCFS_USE_READ_WRITE | |
5067 | pctl.cmd = PCSET; | |
5068 | pctl.data = PR_RLC; | |
5069 | if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) | |
5070 | retval = -1; | |
5071 | #else | |
5072 | retval = ioctl (fd, PIOCSET, &pr_flags); | |
5073 | #endif | |
5074 | } | |
5075 | else | |
5076 | { | |
5077 | #ifdef PROCFS_USE_READ_WRITE | |
5078 | pctl.cmd = PCRESET; | |
5079 | pctl.data = PR_RLC; | |
5080 | if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) | |
5081 | retval = -1; | |
5082 | #else | |
5083 | retval = ioctl (fd, PIOCRESET, &pr_flags); | |
5084 | #endif | |
5085 | } | |
5086 | ||
5087 | #else | |
5088 | #ifdef PIOCSRLC /* Original method */ | |
5089 | if (flag) | |
5090 | retval = ioctl (fd, PIOCSRLC, NULL); | |
5091 | else | |
5092 | retval = ioctl (fd, PIOCRRLC, NULL); | |
5093 | #else | |
5094 | Neither PR_RLC nor PIOCSRLC exist!!! | |
5095 | #endif | |
5096 | #endif | |
5097 | ||
5098 | if (!retval) | |
5099 | return; | |
5100 | ||
5101 | print_sys_errmsg ("modify_run_on_last_close_flag", errno); | |
5102 | error ("PIOCSRLC or PR_RLC modification failed"); | |
5103 | } | |
5104 | ||
5105 | /* | |
5106 | ||
5107 | LOCAL FUNCTION | |
5108 | ||
5109 | procfs_clear_syscall_trap -- Deletes the trap for the specified system call. | |
5110 | ||
5111 | SYNOPSIS | |
5112 | ||
5113 | void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok) | |
5114 | ||
5115 | DESCRIPTION | |
5116 | ||
5117 | This function function disables traps for the specified system call. | |
5118 | errok is non-zero if errors should be ignored. | |
5119 | */ | |
5120 | ||
5121 | static void | |
5122 | procfs_clear_syscall_trap (pi, syscall_num, errok) | |
5123 | struct procinfo *pi; | |
5124 | int syscall_num; | |
5125 | int errok; | |
5126 | { | |
5127 | sysset_t sysset; | |
5128 | int goterr, i; | |
5129 | ||
5130 | #ifndef UNIXWARE | |
5131 | goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0; | |
5132 | ||
5133 | if (goterr && !errok) | |
5134 | { | |
5135 | print_sys_errmsg (pi->pathname, errno); | |
5136 | error ("PIOCGENTRY failed"); | |
5137 | } | |
5138 | ||
5139 | if (!goterr) | |
5140 | { | |
5141 | prdelset (&sysset, syscall_num); | |
5142 | ||
5143 | if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok) | |
5144 | { | |
5145 | print_sys_errmsg (pi->pathname, errno); | |
5146 | error ("PIOCSENTRY failed"); | |
5147 | } | |
5148 | } | |
5149 | ||
5150 | goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0; | |
5151 | ||
5152 | if (goterr && !errok) | |
5153 | { | |
5154 | procfs_clear_syscall_trap (pi, syscall_num, 1); | |
5155 | print_sys_errmsg (pi->pathname, errno); | |
5156 | error ("PIOCGEXIT failed"); | |
5157 | } | |
5158 | ||
5159 | if (!goterr) | |
5160 | { | |
5161 | praddset (&sysset, syscall_num); | |
5162 | ||
5163 | if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok) | |
5164 | { | |
5165 | procfs_clear_syscall_trap (pi, syscall_num, 1); | |
5166 | print_sys_errmsg (pi->pathname, errno); | |
5167 | error ("PIOCSEXIT failed"); | |
5168 | } | |
5169 | } | |
5170 | #endif | |
5171 | ||
5172 | if (!pi->syscall_handlers) | |
5173 | { | |
5174 | if (!errok) | |
5175 | error ("procfs_clear_syscall_trap: syscall_handlers is empty"); | |
5176 | return; | |
5177 | } | |
5178 | ||
5179 | /* Remove handler func from the handler list */ | |
5180 | ||
5181 | for (i = 0; i < pi->num_syscall_handlers; i++) | |
5182 | if (pi->syscall_handlers[i].syscall_num == syscall_num) | |
5183 | { | |
5184 | if (i + 1 != pi->num_syscall_handlers) | |
5185 | { /* Not the last entry. | |
5186 | Move subsequent entries fwd. */ | |
5187 | memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1], | |
5188 | (pi->num_syscall_handlers - i - 1) | |
5189 | * sizeof (struct procfs_syscall_handler)); | |
5190 | } | |
5191 | ||
5192 | pi->syscall_handlers = xrealloc (pi->syscall_handlers, | |
5193 | (pi->num_syscall_handlers - 1) | |
5194 | * sizeof (struct procfs_syscall_handler)); | |
5195 | pi->num_syscall_handlers--; | |
5196 | return; | |
5197 | } | |
5198 | ||
5199 | if (!errok) | |
5200 | error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d", | |
5201 | syscall_num); | |
5202 | } | |
5203 | ||
5204 | /* | |
5205 | ||
5206 | LOCAL FUNCTION | |
5207 | ||
5208 | procfs_set_syscall_trap -- arrange for a function to be called when the | |
5209 | child executes the specified system call. | |
5210 | ||
5211 | SYNOPSIS | |
5212 | ||
5213 | void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags, | |
5214 | syscall_func_t *function) | |
5215 | ||
5216 | DESCRIPTION | |
5217 | ||
5218 | This function sets up an entry and/or exit trap for the specified system | |
5219 | call. When the child executes the specified system call, your function | |
5220 | will be called with the call #, a flag that indicates entry or exit, and | |
5221 | pointers to rtnval and statval (which are used by procfs_wait). The | |
5222 | function should return non-zero if something interesting happened, zero | |
5223 | otherwise. | |
5224 | */ | |
5225 | ||
5226 | static void | |
5227 | procfs_set_syscall_trap (pi, syscall_num, flags, func) | |
5228 | struct procinfo *pi; | |
5229 | int syscall_num; | |
5230 | int flags; | |
5231 | syscall_func_t *func; | |
5232 | { | |
5233 | sysset_t sysset; | |
5234 | ||
5235 | #ifndef UNIXWARE | |
5236 | if (flags & PROCFS_SYSCALL_ENTRY) | |
5237 | { | |
5238 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0) | |
5239 | { | |
5240 | print_sys_errmsg (pi->pathname, errno); | |
5241 | error ("PIOCGENTRY failed"); | |
5242 | } | |
5243 | ||
5244 | praddset (&sysset, syscall_num); | |
5245 | ||
5246 | if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) | |
5247 | { | |
5248 | print_sys_errmsg (pi->pathname, errno); | |
5249 | error ("PIOCSENTRY failed"); | |
5250 | } | |
5251 | } | |
5252 | ||
5253 | if (flags & PROCFS_SYSCALL_EXIT) | |
5254 | { | |
5255 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0) | |
5256 | { | |
5257 | procfs_clear_syscall_trap (pi, syscall_num, 1); | |
5258 | print_sys_errmsg (pi->pathname, errno); | |
5259 | error ("PIOCGEXIT failed"); | |
5260 | } | |
5261 | ||
5262 | praddset (&sysset, syscall_num); | |
5263 | ||
5264 | if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) | |
5265 | { | |
5266 | procfs_clear_syscall_trap (pi, syscall_num, 1); | |
5267 | print_sys_errmsg (pi->pathname, errno); | |
5268 | error ("PIOCSEXIT failed"); | |
5269 | } | |
5270 | } | |
5271 | #endif | |
5272 | ||
5273 | if (!pi->syscall_handlers) | |
5274 | { | |
5275 | pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler)); | |
5276 | pi->syscall_handlers[0].syscall_num = syscall_num; | |
5277 | pi->syscall_handlers[0].func = func; | |
5278 | pi->num_syscall_handlers = 1; | |
5279 | } | |
5280 | else | |
5281 | { | |
5282 | int i; | |
5283 | ||
5284 | for (i = 0; i < pi->num_syscall_handlers; i++) | |
5285 | if (pi->syscall_handlers[i].syscall_num == syscall_num) | |
5286 | { | |
5287 | pi->syscall_handlers[i].func = func; | |
5288 | return; | |
5289 | } | |
5290 | ||
5291 | pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1) | |
5292 | * sizeof (struct procfs_syscall_handler)); | |
5293 | pi->syscall_handlers[i].syscall_num = syscall_num; | |
5294 | pi->syscall_handlers[i].func = func; | |
5295 | pi->num_syscall_handlers++; | |
5296 | } | |
5297 | } | |
5298 | ||
5299 | #ifdef SYS_lwp_create | |
5300 | ||
5301 | /* | |
5302 | ||
5303 | LOCAL FUNCTION | |
5304 | ||
5305 | procfs_lwp_creation_handler - handle exit from the _lwp_create syscall | |
5306 | ||
5307 | SYNOPSIS | |
5308 | ||
5309 | int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
5310 | ||
5311 | DESCRIPTION | |
5312 | ||
5313 | This routine is called both when an inferior process and it's new lwp | |
5314 | are about to finish a _lwp_create() system call. This is the system | |
5315 | call that Solaris uses to create a lightweight process. When the | |
5316 | target process gets this event, we can look at sysarg[2] to find the | |
5317 | new childs lwp ID, and create a procinfo struct from that. After that, | |
5318 | we pretend that we got a SIGTRAP, and return non-zero to tell | |
5319 | procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up, | |
5320 | sees the new process and continues it. | |
5321 | ||
5322 | When we see the child exiting from lwp_create, we just contine it, | |
5323 | since everything was handled when the parent trapped. | |
5324 | ||
5325 | NOTES | |
5326 | In effect, we are only paying attention to the parent's completion of | |
5327 | the lwp_create syscall. If we only paid attention to the child | |
5328 | instead, then we wouldn't detect the creation of a suspended thread. | |
5329 | */ | |
5330 | ||
5331 | static int | |
5332 | procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
5333 | struct procinfo *pi; | |
5334 | int syscall_num; | |
5335 | int why; | |
5336 | int *rtnvalp; | |
5337 | int *statvalp; | |
5338 | { | |
5339 | int lwp_id; | |
5340 | struct procinfo *childpi; | |
5341 | struct proc_ctl pctl; | |
5342 | ||
5343 | /* We've just detected the completion of an lwp_create system call. Now we | |
5344 | need to setup a procinfo struct for this thread, and notify the thread | |
5345 | system of the new arrival. */ | |
5346 | ||
5347 | /* If lwp_create failed, then nothing interesting happened. Continue the | |
5348 | process and go back to sleep. */ | |
5349 | ||
5350 | #ifdef UNIXWARE | |
5351 | /* Joel ... can you check this logic out please? JKJ */ | |
5352 | if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1) | |
5353 | { /* _lwp_create failed */ | |
5354 | pctl.cmd = PCRUN; | |
5355 | pctl.data = PRCFAULT; | |
5356 | ||
5357 | if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) | |
5358 | perror_with_name (pi->pathname); | |
5359 | ||
5360 | return 0; | |
5361 | } | |
5362 | #else /* UNIXWARE */ | |
5363 | if (PROCFS_GET_CARRY (pi->prstatus.pr_reg)) | |
5364 | { /* _lwp_create failed */ | |
5365 | pi->prrun.pr_flags &= PRSTEP; | |
5366 | pi->prrun.pr_flags |= PRCFAULT; | |
5367 | ||
5368 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) | |
5369 | perror_with_name (pi->pathname); | |
5370 | ||
5371 | return 0; | |
5372 | } | |
5373 | #endif | |
5374 | ||
5375 | /* At this point, the new thread is stopped at it's first instruction, and | |
5376 | the parent is stopped at the exit from lwp_create. */ | |
5377 | ||
5378 | if (pi->new_child) /* Child? */ | |
5379 | { /* Yes, just continue it */ | |
5380 | #ifdef UNIXWARE | |
5381 | pctl.cmd = PCRUN; | |
5382 | pctl.data = PRCFAULT; | |
5383 | ||
5384 | if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0) | |
5385 | #else /* !UNIXWARE */ | |
5386 | pi->prrun.pr_flags &= PRSTEP; | |
5387 | pi->prrun.pr_flags |= PRCFAULT; | |
5388 | ||
5389 | if ((pi->prstatus.pr_flags & PR_ISTOP) | |
5390 | && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) | |
5391 | #endif /* !UNIXWARE */ | |
5392 | perror_with_name (pi->pathname); | |
5393 | ||
5394 | pi->new_child = 0; /* No longer new */ | |
5395 | ||
5396 | return 0; | |
5397 | } | |
5398 | ||
5399 | /* We're the proud parent of a new thread. Setup an exit trap for lwp_create | |
5400 | in the child and continue the parent. */ | |
5401 | ||
5402 | /* Third arg is pointer to new thread id. */ | |
5403 | lwp_id = read_memory_integer ( | |
5404 | THE_PR_LWP(pi->prstatus).pr_sysarg[2], sizeof (int)); | |
5405 | ||
5406 | lwp_id = (lwp_id << 16) | PIDGET (pi->pid); | |
5407 | ||
5408 | childpi = create_procinfo (lwp_id); | |
5409 | ||
5410 | /* The new process has actually inherited the lwp_create syscall trap from | |
5411 | it's parent, but we still have to call this to register handlers for | |
5412 | that child. */ | |
5413 | ||
5414 | procfs_set_inferior_syscall_traps (childpi); | |
5415 | add_thread (lwp_id); | |
5416 | printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id)); | |
5417 | ||
5418 | /* Continue the parent */ | |
5419 | #ifdef UNIXWARE | |
5420 | pctl.cmd = PCRUN; | |
5421 | pctl.data = PRCFAULT; | |
5422 | ||
5423 | if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0) | |
5424 | #else | |
5425 | pi->prrun.pr_flags &= PRSTEP; | |
5426 | pi->prrun.pr_flags |= PRCFAULT; | |
5427 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) | |
5428 | #endif | |
5429 | perror_with_name (pi->pathname); | |
5430 | ||
5431 | /* The new child may have been created in one of two states: | |
5432 | SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run. | |
5433 | If suspended, we flag it to be continued later, when it has an event. */ | |
5434 | ||
5435 | if (THE_PR_LWP(childpi->prstatus).pr_why == PR_SUSPENDED) | |
5436 | childpi->new_child = 1; /* Flag this as an unseen child process */ | |
5437 | else | |
5438 | { | |
5439 | /* Continue the child */ | |
5440 | #ifdef UNIXWARE | |
5441 | pctl.cmd = PCRUN; | |
5442 | pctl.data = PRCFAULT; | |
5443 | ||
5444 | if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0) | |
5445 | #else | |
5446 | childpi->prrun.pr_flags &= PRSTEP; | |
5447 | childpi->prrun.pr_flags |= PRCFAULT; | |
5448 | ||
5449 | if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0) | |
5450 | #endif | |
5451 | perror_with_name (childpi->pathname); | |
5452 | } | |
5453 | return 0; | |
5454 | } | |
5455 | #endif /* SYS_lwp_create */ | |
5456 | ||
5457 | /* Fork an inferior process, and start debugging it with /proc. */ | |
5458 | ||
5459 | static void | |
5460 | procfs_create_inferior (exec_file, allargs, env) | |
5461 | char *exec_file; | |
5462 | char *allargs; | |
5463 | char **env; | |
5464 | { | |
5465 | char *shell_file = getenv ("SHELL"); | |
5466 | char *tryname; | |
5467 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
5468 | { | |
5469 | ||
5470 | /* We will be looking down the PATH to find shell_file. If we | |
5471 | just do this the normal way (via execlp, which operates by | |
5472 | attempting an exec for each element of the PATH until it | |
5473 | finds one which succeeds), then there will be an exec for | |
5474 | each failed attempt, each of which will cause a PR_SYSEXIT | |
5475 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
5476 | for these failed execs with the ones for successful execs | |
5477 | (whether the exec has succeeded is stored at that time in the | |
5478 | carry bit or some such architecture-specific and | |
5479 | non-ABI-specified place). | |
5480 | ||
5481 | So I can't think of anything better than to search the PATH | |
5482 | now. This has several disadvantages: (1) There is a race | |
5483 | condition; if we find a file now and it is deleted before we | |
5484 | exec it, we lose, even if the deletion leaves a valid file | |
5485 | further down in the PATH, (2) there is no way to know exactly | |
5486 | what an executable (in the sense of "capable of being | |
5487 | exec'd") file is. Using access() loses because it may lose | |
5488 | if the caller is the superuser; failing to use it loses if | |
5489 | there are ACLs or some such. */ | |
5490 | ||
5491 | char *p; | |
5492 | char *p1; | |
5493 | /* FIXME-maybe: might want "set path" command so user can change what | |
5494 | path is used from within GDB. */ | |
5495 | char *path = getenv ("PATH"); | |
5496 | int len; | |
5497 | struct stat statbuf; | |
5498 | ||
5499 | if (path == NULL) | |
5500 | path = "/bin:/usr/bin"; | |
5501 | ||
5502 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
5503 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) | |
5504 | { | |
5505 | p1 = strchr (p, ':'); | |
5506 | if (p1 != NULL) | |
5507 | len = p1 - p; | |
5508 | else | |
5509 | len = strlen (p); | |
5510 | strncpy (tryname, p, len); | |
5511 | tryname[len] = '\0'; | |
5512 | strcat (tryname, "/"); | |
5513 | strcat (tryname, shell_file); | |
5514 | if (access (tryname, X_OK) < 0) | |
5515 | continue; | |
5516 | if (stat (tryname, &statbuf) < 0) | |
5517 | continue; | |
5518 | if (!S_ISREG (statbuf.st_mode)) | |
5519 | /* We certainly need to reject directories. I'm not quite | |
5520 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
5521 | that people want to exec() these things. */ | |
5522 | continue; | |
5523 | break; | |
5524 | } | |
5525 | if (p == NULL) | |
5526 | /* Not found. This must be an error rather than merely passing | |
5527 | the file to execlp(), because execlp() would try all the | |
5528 | exec()s, causing GDB to get confused. */ | |
5529 | error ("Can't find shell %s in PATH", shell_file); | |
5530 | ||
5531 | shell_file = tryname; | |
5532 | } | |
5533 | ||
5534 | fork_inferior (exec_file, allargs, env, | |
5535 | proc_set_exec_trap, procfs_init_inferior, NULL, shell_file); | |
5536 | ||
5537 | /* We are at the first instruction we care about. */ | |
5538 | /* Pedal to the metal... */ | |
5539 | ||
5540 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); | |
5541 | } | |
5542 | ||
5543 | /* Clean up after the inferior dies. */ | |
5544 | ||
5545 | static void | |
5546 | procfs_mourn_inferior () | |
5547 | { | |
5548 | struct procinfo *pi; | |
5549 | struct procinfo *next_pi; | |
5550 | ||
5551 | for (pi = procinfo_list; pi; pi = next_pi) | |
5552 | { | |
5553 | next_pi = pi->next; | |
5554 | unconditionally_kill_inferior (pi); | |
5555 | } | |
5556 | ||
5557 | unpush_target (&procfs_ops); | |
5558 | generic_mourn_inferior (); | |
5559 | } | |
5560 | ||
5561 | ||
5562 | /* Mark our target-struct as eligible for stray "run" and "attach" commands. */ | |
5563 | static int | |
5564 | procfs_can_run () | |
5565 | { | |
5566 | /* This variable is controlled by modules that sit atop procfs that may layer | |
5567 | their own process structure atop that provided here. sol-thread.c does | |
5568 | this because of the Solaris two-level thread model. */ | |
5569 | ||
5570 | return !procfs_suppress_run; | |
5571 | } | |
5572 | #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS | |
5573 | #ifndef UNIXWARE | |
5574 | \f | |
5575 | /* Insert a watchpoint */ | |
5576 | int | |
5577 | procfs_set_watchpoint(pid, addr, len, rw) | |
5578 | int pid; | |
5579 | CORE_ADDR addr; | |
5580 | int len; | |
5581 | int rw; | |
5582 | { | |
5583 | struct procinfo *pi; | |
5584 | prwatch_t wpt; | |
5585 | ||
5586 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); | |
5587 | wpt.pr_vaddr = (caddr_t)addr; | |
5588 | wpt.pr_size = len; | |
5589 | wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0); | |
5590 | if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0) | |
5591 | { | |
5592 | if (errno == E2BIG) | |
5593 | return -1; | |
5594 | /* Currently it sometimes happens that the same watchpoint gets | |
5595 | deleted twice - don't die in this case (FIXME please) */ | |
5596 | if (errno == ESRCH && len == 0) | |
5597 | return 0; | |
5598 | print_sys_errmsg (pi->pathname, errno); | |
5599 | error ("PIOCSWATCH failed"); | |
5600 | } | |
5601 | return 0; | |
5602 | } | |
5603 | ||
5604 | int | |
5605 | procfs_stopped_by_watchpoint(pid) | |
5606 | int pid; | |
5607 | { | |
5608 | struct procinfo *pi; | |
5609 | short what; | |
5610 | short why; | |
5611 | ||
5612 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); | |
5613 | if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) | |
5614 | { | |
5615 | why = pi->prstatus.pr_why; | |
5616 | what = pi->prstatus.pr_what; | |
5617 | if (why == PR_FAULTED | |
5618 | #if defined (FLTWATCH) && defined (FLTKWATCH) | |
5619 | && (what == FLTWATCH || what == FLTKWATCH) | |
5620 | #else | |
5621 | #ifdef FLTWATCH | |
5622 | && (what == FLTWATCH) | |
5623 | #endif | |
5624 | #ifdef FLTKWATCH | |
5625 | && (what == FLTKWATCH) | |
5626 | #endif | |
5627 | #endif | |
5628 | ) | |
5629 | return what; | |
5630 | } | |
5631 | return 0; | |
5632 | } | |
5633 | #endif /* !UNIXWARE */ | |
5634 | #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */ | |
5635 | ||
5636 | /* Why is this necessary? Shouldn't dead threads just be removed from the | |
5637 | thread database? */ | |
5638 | ||
5639 | static int | |
5640 | procfs_thread_alive (pid) | |
5641 | int pid; | |
5642 | { | |
5643 | struct procinfo *pi, *next_pi; | |
5644 | ||
5645 | for (pi = procinfo_list; pi; pi = next_pi) | |
5646 | { | |
5647 | next_pi = pi->next; | |
5648 | if (pi -> pid == pid) | |
5649 | if (procfs_read_status (pi)) /* alive */ | |
5650 | return 1; | |
5651 | else /* defunct (exited) */ | |
5652 | { | |
5653 | close_proc_file (pi); | |
5654 | return 0; | |
5655 | } | |
5656 | } | |
5657 | return 0; | |
5658 | } | |
5659 | ||
5660 | int | |
5661 | procfs_first_available () | |
5662 | { | |
5663 | struct procinfo *pi; | |
5664 | ||
5665 | for (pi = procinfo_list; pi; pi = pi->next) | |
5666 | { | |
5667 | if (procfs_read_status (pi)) | |
5668 | return pi->pid; | |
5669 | } | |
5670 | return -1; | |
5671 | } | |
5672 | ||
5673 | int | |
5674 | procfs_get_pid_fd (pid) | |
5675 | int pid; | |
5676 | { | |
5677 | struct procinfo *pi = find_procinfo (pid, 1); | |
5678 | ||
5679 | if (pi == NULL) | |
5680 | return -1; | |
5681 | ||
5682 | return pi->ctl_fd; | |
5683 | } | |
5684 | ||
5685 | /* Send a SIGINT to the process group. This acts just like the user typed a | |
5686 | ^C on the controlling terminal. | |
5687 | ||
5688 | XXX - This may not be correct for all systems. Some may want to use | |
5689 | killpg() instead of kill (-pgrp). */ | |
5690 | ||
5691 | static void | |
5692 | procfs_stop () | |
5693 | { | |
5694 | extern pid_t inferior_process_group; | |
5695 | ||
5696 | kill (-inferior_process_group, SIGINT); | |
5697 | } | |
5698 | \f | |
5699 | /* Convert a pid to printable form. */ | |
5700 | ||
5701 | #ifdef TIDGET | |
5702 | char * | |
5703 | procfs_pid_to_str (pid) | |
5704 | int pid; | |
5705 | { | |
5706 | static char buf[100]; | |
5707 | ||
5708 | sprintf (buf, "Kernel thread %d", TIDGET (pid)); | |
5709 | ||
5710 | return buf; | |
5711 | } | |
5712 | #endif /* TIDGET */ | |
5713 | ||
5714 | \f | |
5715 | static void | |
5716 | init_procfs_ops () | |
5717 | { | |
5718 | procfs_ops.to_shortname = "procfs"; | |
5719 | procfs_ops.to_longname = "Unix /proc child process"; | |
5720 | procfs_ops.to_doc = "Unix /proc child process (started by the \"run\" command)."; | |
5721 | procfs_ops.to_open = procfs_open; | |
5722 | procfs_ops.to_attach = procfs_attach; | |
5723 | procfs_ops.to_detach = procfs_detach; | |
5724 | procfs_ops.to_resume = procfs_resume; | |
5725 | procfs_ops.to_wait = procfs_wait; | |
5726 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
5727 | procfs_ops.to_store_registers = procfs_store_registers; | |
5728 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
5729 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
5730 | procfs_ops.to_files_info = procfs_files_info; | |
5731 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
5732 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
5733 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
5734 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
5735 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
5736 | procfs_ops.to_terminal_ours = terminal_ours; | |
5737 | procfs_ops.to_terminal_info = child_terminal_info; | |
5738 | procfs_ops.to_kill = procfs_kill_inferior; | |
5739 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
5740 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
5741 | procfs_ops.to_can_run = procfs_can_run; | |
5742 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
5743 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
5744 | procfs_ops.to_stop = procfs_stop; | |
5745 | procfs_ops.to_stratum = process_stratum; | |
5746 | procfs_ops.to_has_all_memory = 1; | |
5747 | procfs_ops.to_has_memory = 1; | |
5748 | procfs_ops.to_has_stack = 1; | |
5749 | procfs_ops.to_has_registers = 1; | |
5750 | procfs_ops.to_has_execution = 1; | |
5751 | procfs_ops.to_magic = OPS_MAGIC; | |
5752 | } | |
5753 | ||
5754 | void | |
5755 | _initialize_procfs () | |
5756 | { | |
5757 | #ifdef HAVE_OPTIONAL_PROC_FS | |
5758 | char procname[MAX_PROC_NAME_SIZE]; | |
5759 | int fd; | |
5760 | ||
5761 | /* If we have an optional /proc filesystem (e.g. under OSF/1), | |
5762 | don't add procfs support if we cannot access the running | |
5763 | GDB via /proc. */ | |
5764 | sprintf (procname, STATUS_PROC_NAME_FMT, getpid ()); | |
5765 | if ((fd = open (procname, O_RDONLY)) < 0) | |
5766 | return; | |
5767 | close (fd); | |
5768 | #endif | |
5769 | ||
5770 | init_procfs_ops (); | |
5771 | add_target (&procfs_ops); | |
5772 | ||
5773 | add_info ("processes", info_proc, | |
5774 | "Show process status information using /proc entry.\n\ | |
5775 | Specify process id or use current inferior by default.\n\ | |
5776 | Specify keywords for detailed information; default is summary.\n\ | |
5777 | Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\ | |
5778 | `status', `syscalls', and `times'.\n\ | |
5779 | Unambiguous abbreviations may be used."); | |
5780 | ||
5781 | init_syscall_table (); | |
5782 | } |