Commit | Line | Data |
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35f5886e | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
255181a9 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc. |
35f5886e FF |
3 | Written by Fred Fish at Cygnus Support. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
6c9638b4 | 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
35f5886e FF |
20 | |
21 | ||
22 | /* N O T E S | |
23 | ||
24 | For information on the details of using /proc consult section proc(4) | |
25 | in the UNIX System V Release 4 System Administrator's Reference Manual. | |
26 | ||
27 | The general register and floating point register sets are manipulated by | |
28 | separate ioctl's. This file makes the assumption that if FP0_REGNUM is | |
29 | defined, then support for the floating point register set is desired, | |
30 | regardless of whether or not the actual target has floating point hardware. | |
31 | ||
32 | */ | |
33 | ||
34 | ||
5129100c | 35 | #include "defs.h" |
35f5886e | 36 | |
08f74b92 | 37 | #include <sys/types.h> |
407a8389 | 38 | #include <time.h> |
2592eef8 PS |
39 | #include <sys/fault.h> |
40 | #include <sys/syscall.h> | |
35f5886e FF |
41 | #include <sys/procfs.h> |
42 | #include <fcntl.h> | |
43 | #include <errno.h> | |
2b576293 | 44 | #include "gdb_string.h" |
de43d7d0 SG |
45 | #include <stropts.h> |
46 | #include <poll.h> | |
08f74b92 | 47 | #include <unistd.h> |
2b576293 | 48 | #include "gdb_stat.h" |
35f5886e | 49 | |
35f5886e FF |
50 | #include "inferior.h" |
51 | #include "target.h" | |
51b57ded | 52 | #include "command.h" |
3fbdd536 | 53 | #include "gdbcore.h" |
fdfa3315 | 54 | #include "gdbthread.h" |
cc221e76 FF |
55 | |
56 | #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */ | |
35f5886e FF |
57 | |
58 | #ifndef PROC_NAME_FMT | |
6c316cfd | 59 | #define PROC_NAME_FMT "/proc/%05d" |
35f5886e FF |
60 | #endif |
61 | ||
3fbdd536 JG |
62 | extern struct target_ops procfs_ops; /* Forward declaration */ |
63 | ||
8fc2b417 SG |
64 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
65 | be a runnable target. Used by targets | |
66 | that can sit atop procfs, such as solaris | |
67 | thread support. */ | |
68 | ||
35f5886e FF |
69 | #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */ |
70 | CORE_ADDR kernel_u_addr; | |
71 | #endif | |
72 | ||
cc221e76 FF |
73 | #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */ |
74 | #undef si_pid | |
75 | #define si_pid _data._proc.pid | |
76 | #undef si_uid | |
77 | #define si_uid _data._proc._pdata._kill.uid | |
78 | #endif /* BROKEN_SIGINFO_H */ | |
79 | ||
35f5886e FF |
80 | /* All access to the inferior, either one started by gdb or one that has |
81 | been attached to, is controlled by an instance of a procinfo structure, | |
82 | defined below. Since gdb currently only handles one inferior at a time, | |
a39ad5ce FF |
83 | the procinfo structure for the inferior is statically allocated and |
84 | only one exists at any given time. There is a separate procinfo | |
85 | structure for use by the "info proc" command, so that we can print | |
86 | useful information about any random process without interfering with | |
87 | the inferior's procinfo information. */ | |
35f5886e FF |
88 | |
89 | struct procinfo { | |
de43d7d0 | 90 | struct procinfo *next; |
35f5886e FF |
91 | int pid; /* Process ID of inferior */ |
92 | int fd; /* File descriptor for /proc entry */ | |
93 | char *pathname; /* Pathname to /proc entry */ | |
de43d7d0 | 94 | int had_event; /* poll/select says something happened */ |
35f5886e | 95 | int was_stopped; /* Nonzero if was stopped prior to attach */ |
d65eee73 | 96 | int nopass_next_sigstop; /* Don't pass a sigstop on next resume */ |
35f5886e FF |
97 | prrun_t prrun; /* Control state when it is run */ |
98 | prstatus_t prstatus; /* Current process status info */ | |
99 | gregset_t gregset; /* General register set */ | |
100 | fpregset_t fpregset; /* Floating point register set */ | |
101 | fltset_t fltset; /* Current traced hardware fault set */ | |
102 | sigset_t trace; /* Current traced signal set */ | |
103 | sysset_t exitset; /* Current traced system call exit set */ | |
104 | sysset_t entryset; /* Current traced system call entry set */ | |
cc221e76 FF |
105 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
106 | sigset_t saved_trace; /* Saved traced signal set */ | |
107 | sigset_t saved_sighold; /* Saved held signal set */ | |
108 | sysset_t saved_exitset; /* Saved traced system call exit set */ | |
109 | sysset_t saved_entryset; /* Saved traced system call entry set */ | |
8fc2b417 SG |
110 | int num_syscall_handlers; /* Number of syscall handlers currently installed */ |
111 | struct procfs_syscall_handler *syscall_handlers; /* Pointer to list of syscall trap handlers */ | |
112 | int new_child; /* Non-zero if it's a new thread */ | |
a39ad5ce FF |
113 | }; |
114 | ||
de43d7d0 SG |
115 | /* List of inferior process information */ |
116 | static struct procinfo *procinfo_list = NULL; | |
117 | ||
118 | static struct pollfd *poll_list; /* pollfds used for waiting on /proc */ | |
119 | ||
120 | static int num_poll_list = 0; /* Number of entries in poll_list */ | |
121 | ||
cc221e76 FF |
122 | /* Much of the information used in the /proc interface, particularly for |
123 | printing status information, is kept as tables of structures of the | |
124 | following form. These tables can be used to map numeric values to | |
125 | their symbolic names and to a string that describes their specific use. */ | |
126 | ||
127 | struct trans { | |
128 | int value; /* The numeric value */ | |
129 | char *name; /* The equivalent symbolic value */ | |
130 | char *desc; /* Short description of value */ | |
131 | }; | |
132 | ||
133 | /* Translate bits in the pr_flags member of the prstatus structure, into the | |
134 | names and desc information. */ | |
135 | ||
136 | static struct trans pr_flag_table[] = | |
137 | { | |
138 | #if defined (PR_STOPPED) | |
e3be225e | 139 | { PR_STOPPED, "PR_STOPPED", "Process is stopped" }, |
cc221e76 FF |
140 | #endif |
141 | #if defined (PR_ISTOP) | |
e3be225e | 142 | { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" }, |
cc221e76 FF |
143 | #endif |
144 | #if defined (PR_DSTOP) | |
e3be225e | 145 | { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" }, |
cc221e76 FF |
146 | #endif |
147 | #if defined (PR_ASLEEP) | |
e3be225e | 148 | { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" }, |
cc221e76 FF |
149 | #endif |
150 | #if defined (PR_FORK) | |
e3be225e | 151 | { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" }, |
cc221e76 FF |
152 | #endif |
153 | #if defined (PR_RLC) | |
e3be225e | 154 | { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" }, |
cc221e76 FF |
155 | #endif |
156 | #if defined (PR_PTRACE) | |
e3be225e | 157 | { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" }, |
cc221e76 FF |
158 | #endif |
159 | #if defined (PR_PCINVAL) | |
e3be225e | 160 | { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" }, |
cc221e76 FF |
161 | #endif |
162 | #if defined (PR_ISSYS) | |
e3be225e | 163 | { PR_ISSYS, "PR_ISSYS", "Is a system process" }, |
5c1c5e67 FF |
164 | #endif |
165 | #if defined (PR_STEP) | |
e3be225e | 166 | { PR_STEP, "PR_STEP", "Process has single step pending" }, |
5c1c5e67 FF |
167 | #endif |
168 | #if defined (PR_KLC) | |
e3be225e | 169 | { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" }, |
5c1c5e67 FF |
170 | #endif |
171 | #if defined (PR_ASYNC) | |
e3be225e | 172 | { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" }, |
5c1c5e67 FF |
173 | #endif |
174 | #if defined (PR_PCOMPAT) | |
e3be225e | 175 | { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" }, |
cc221e76 | 176 | #endif |
e3be225e | 177 | { 0, NULL, NULL } |
cc221e76 FF |
178 | }; |
179 | ||
180 | /* Translate values in the pr_why field of the prstatus struct. */ | |
181 | ||
182 | static struct trans pr_why_table[] = | |
183 | { | |
184 | #if defined (PR_REQUESTED) | |
e3be225e | 185 | { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" }, |
cc221e76 FF |
186 | #endif |
187 | #if defined (PR_SIGNALLED) | |
e3be225e | 188 | { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" }, |
cc221e76 FF |
189 | #endif |
190 | #if defined (PR_FAULTED) | |
e3be225e | 191 | { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" }, |
cc221e76 FF |
192 | #endif |
193 | #if defined (PR_SYSENTRY) | |
e3be225e | 194 | { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" }, |
cc221e76 FF |
195 | #endif |
196 | #if defined (PR_SYSEXIT) | |
e3be225e | 197 | { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" }, |
cc221e76 FF |
198 | #endif |
199 | #if defined (PR_JOBCONTROL) | |
e3be225e | 200 | { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" }, |
5c1c5e67 FF |
201 | #endif |
202 | #if defined (PR_SUSPENDED) | |
e3be225e | 203 | { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" }, |
cc221e76 | 204 | #endif |
e3be225e | 205 | { 0, NULL, NULL } |
cc221e76 FF |
206 | }; |
207 | ||
208 | /* Hardware fault translation table. */ | |
209 | ||
210 | static struct trans faults_table[] = | |
211 | { | |
212 | #if defined (FLTILL) | |
e3be225e | 213 | { FLTILL, "FLTILL", "Illegal instruction" }, |
cc221e76 FF |
214 | #endif |
215 | #if defined (FLTPRIV) | |
e3be225e | 216 | { FLTPRIV, "FLTPRIV", "Privileged instruction" }, |
cc221e76 FF |
217 | #endif |
218 | #if defined (FLTBPT) | |
e3be225e | 219 | { FLTBPT, "FLTBPT", "Breakpoint trap" }, |
cc221e76 FF |
220 | #endif |
221 | #if defined (FLTTRACE) | |
e3be225e | 222 | { FLTTRACE, "FLTTRACE", "Trace trap" }, |
cc221e76 FF |
223 | #endif |
224 | #if defined (FLTACCESS) | |
e3be225e | 225 | { FLTACCESS, "FLTACCESS", "Memory access fault" }, |
cc221e76 FF |
226 | #endif |
227 | #if defined (FLTBOUNDS) | |
e3be225e | 228 | { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" }, |
cc221e76 FF |
229 | #endif |
230 | #if defined (FLTIOVF) | |
e3be225e | 231 | { FLTIOVF, "FLTIOVF", "Integer overflow" }, |
cc221e76 FF |
232 | #endif |
233 | #if defined (FLTIZDIV) | |
e3be225e | 234 | { FLTIZDIV, "FLTIZDIV", "Integer zero divide" }, |
cc221e76 FF |
235 | #endif |
236 | #if defined (FLTFPE) | |
e3be225e | 237 | { FLTFPE, "FLTFPE", "Floating-point exception" }, |
cc221e76 FF |
238 | #endif |
239 | #if defined (FLTSTACK) | |
e3be225e | 240 | { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" }, |
cc221e76 FF |
241 | #endif |
242 | #if defined (FLTPAGE) | |
e3be225e | 243 | { FLTPAGE, "FLTPAGE", "Recoverable page fault" }, |
cc221e76 | 244 | #endif |
e3be225e | 245 | { 0, NULL, NULL } |
cc221e76 FF |
246 | }; |
247 | ||
248 | /* Translation table for signal generation information. See UNIX System | |
249 | V Release 4 Programmer's Reference Manual, siginfo(5). */ | |
250 | ||
251 | static struct sigcode { | |
252 | int signo; | |
253 | int code; | |
254 | char *codename; | |
255 | char *desc; | |
256 | } siginfo_table[] = { | |
257 | #if defined (SIGILL) && defined (ILL_ILLOPC) | |
e3be225e | 258 | { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" }, |
cc221e76 FF |
259 | #endif |
260 | #if defined (SIGILL) && defined (ILL_ILLOPN) | |
e3be225e | 261 | { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", }, |
cc221e76 FF |
262 | #endif |
263 | #if defined (SIGILL) && defined (ILL_ILLADR) | |
e3be225e | 264 | { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" }, |
cc221e76 FF |
265 | #endif |
266 | #if defined (SIGILL) && defined (ILL_ILLTRP) | |
e3be225e | 267 | { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" }, |
cc221e76 FF |
268 | #endif |
269 | #if defined (SIGILL) && defined (ILL_PRVOPC) | |
e3be225e | 270 | { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" }, |
cc221e76 FF |
271 | #endif |
272 | #if defined (SIGILL) && defined (ILL_PRVREG) | |
e3be225e | 273 | { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" }, |
cc221e76 FF |
274 | #endif |
275 | #if defined (SIGILL) && defined (ILL_COPROC) | |
e3be225e | 276 | { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" }, |
cc221e76 FF |
277 | #endif |
278 | #if defined (SIGILL) && defined (ILL_BADSTK) | |
e3be225e | 279 | { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" }, |
cc221e76 FF |
280 | #endif |
281 | #if defined (SIGFPE) && defined (FPE_INTDIV) | |
e3be225e | 282 | { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" }, |
cc221e76 FF |
283 | #endif |
284 | #if defined (SIGFPE) && defined (FPE_INTOVF) | |
e3be225e | 285 | { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" }, |
cc221e76 FF |
286 | #endif |
287 | #if defined (SIGFPE) && defined (FPE_FLTDIV) | |
e3be225e | 288 | { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" }, |
cc221e76 FF |
289 | #endif |
290 | #if defined (SIGFPE) && defined (FPE_FLTOVF) | |
e3be225e | 291 | { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" }, |
cc221e76 FF |
292 | #endif |
293 | #if defined (SIGFPE) && defined (FPE_FLTUND) | |
e3be225e | 294 | { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" }, |
cc221e76 FF |
295 | #endif |
296 | #if defined (SIGFPE) && defined (FPE_FLTRES) | |
e3be225e | 297 | { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" }, |
cc221e76 FF |
298 | #endif |
299 | #if defined (SIGFPE) && defined (FPE_FLTINV) | |
e3be225e | 300 | { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" }, |
cc221e76 FF |
301 | #endif |
302 | #if defined (SIGFPE) && defined (FPE_FLTSUB) | |
e3be225e | 303 | { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" }, |
cc221e76 FF |
304 | #endif |
305 | #if defined (SIGSEGV) && defined (SEGV_MAPERR) | |
e3be225e | 306 | { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" }, |
cc221e76 FF |
307 | #endif |
308 | #if defined (SIGSEGV) && defined (SEGV_ACCERR) | |
e3be225e | 309 | { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" }, |
cc221e76 FF |
310 | #endif |
311 | #if defined (SIGBUS) && defined (BUS_ADRALN) | |
e3be225e | 312 | { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" }, |
cc221e76 FF |
313 | #endif |
314 | #if defined (SIGBUS) && defined (BUS_ADRERR) | |
e3be225e | 315 | { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" }, |
cc221e76 FF |
316 | #endif |
317 | #if defined (SIGBUS) && defined (BUS_OBJERR) | |
e3be225e | 318 | { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" }, |
cc221e76 FF |
319 | #endif |
320 | #if defined (SIGTRAP) && defined (TRAP_BRKPT) | |
e3be225e | 321 | { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" }, |
cc221e76 FF |
322 | #endif |
323 | #if defined (SIGTRAP) && defined (TRAP_TRACE) | |
e3be225e | 324 | { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" }, |
cc221e76 FF |
325 | #endif |
326 | #if defined (SIGCLD) && defined (CLD_EXITED) | |
e3be225e | 327 | { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" }, |
cc221e76 FF |
328 | #endif |
329 | #if defined (SIGCLD) && defined (CLD_KILLED) | |
e3be225e | 330 | { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" }, |
cc221e76 FF |
331 | #endif |
332 | #if defined (SIGCLD) && defined (CLD_DUMPED) | |
e3be225e | 333 | { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" }, |
cc221e76 FF |
334 | #endif |
335 | #if defined (SIGCLD) && defined (CLD_TRAPPED) | |
e3be225e | 336 | { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" }, |
cc221e76 FF |
337 | #endif |
338 | #if defined (SIGCLD) && defined (CLD_STOPPED) | |
e3be225e | 339 | { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" }, |
cc221e76 FF |
340 | #endif |
341 | #if defined (SIGCLD) && defined (CLD_CONTINUED) | |
e3be225e | 342 | { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" }, |
cc221e76 FF |
343 | #endif |
344 | #if defined (SIGPOLL) && defined (POLL_IN) | |
e3be225e | 345 | { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" }, |
cc221e76 FF |
346 | #endif |
347 | #if defined (SIGPOLL) && defined (POLL_OUT) | |
e3be225e | 348 | { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" }, |
cc221e76 FF |
349 | #endif |
350 | #if defined (SIGPOLL) && defined (POLL_MSG) | |
e3be225e | 351 | { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" }, |
cc221e76 FF |
352 | #endif |
353 | #if defined (SIGPOLL) && defined (POLL_ERR) | |
e3be225e | 354 | { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" }, |
cc221e76 FF |
355 | #endif |
356 | #if defined (SIGPOLL) && defined (POLL_PRI) | |
e3be225e | 357 | { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" }, |
cc221e76 FF |
358 | #endif |
359 | #if defined (SIGPOLL) && defined (POLL_HUP) | |
e3be225e | 360 | { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" }, |
cc221e76 | 361 | #endif |
e3be225e | 362 | { 0, 0, NULL, NULL } |
cc221e76 FF |
363 | }; |
364 | ||
cc221e76 FF |
365 | static char *syscall_table[MAX_SYSCALLS]; |
366 | ||
1ab3bf1b JG |
367 | /* Prototypes for local functions */ |
368 | ||
b607efe7 FF |
369 | static void procfs_stop PARAMS ((void)); |
370 | ||
371 | static int procfs_thread_alive PARAMS ((int)); | |
372 | ||
373 | static int procfs_can_run PARAMS ((void)); | |
374 | ||
375 | static void procfs_mourn_inferior PARAMS ((void)); | |
376 | ||
377 | static void procfs_fetch_registers PARAMS ((int)); | |
378 | ||
379 | static int procfs_wait PARAMS ((int, struct target_waitstatus *)); | |
380 | ||
381 | static void procfs_open PARAMS ((char *, int)); | |
382 | ||
383 | static void procfs_files_info PARAMS ((struct target_ops *)); | |
384 | ||
385 | static void procfs_prepare_to_store PARAMS ((void)); | |
386 | ||
387 | static void procfs_detach PARAMS ((char *, int)); | |
388 | ||
389 | static void procfs_attach PARAMS ((char *, int)); | |
390 | ||
391 | static void proc_set_exec_trap PARAMS ((void)); | |
392 | ||
393 | static int procfs_init_inferior PARAMS ((int)); | |
394 | ||
395 | static struct procinfo *create_procinfo PARAMS ((int)); | |
396 | ||
397 | static void procfs_store_registers PARAMS ((int)); | |
398 | ||
399 | static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *)); | |
400 | ||
401 | static void procfs_kill_inferior PARAMS ((void)); | |
402 | ||
403 | static char *sigcodedesc PARAMS ((siginfo_t *)); | |
404 | ||
405 | static char *sigcodename PARAMS ((siginfo_t *)); | |
406 | ||
407 | static struct procinfo *wait_fd PARAMS ((void)); | |
408 | ||
409 | static void remove_fd PARAMS ((struct procinfo *)); | |
410 | ||
411 | static void add_fd PARAMS ((struct procinfo *)); | |
412 | ||
e3be225e | 413 | static void set_proc_siginfo PARAMS ((struct procinfo *, int)); |
6b801388 | 414 | |
e3be225e | 415 | static void init_syscall_table PARAMS ((void)); |
cc221e76 | 416 | |
e3be225e | 417 | static char *syscallname PARAMS ((int)); |
cc221e76 | 418 | |
e3be225e | 419 | static char *signalname PARAMS ((int)); |
cc221e76 | 420 | |
e3be225e | 421 | static char *errnoname PARAMS ((int)); |
4ace50a5 | 422 | |
e3be225e | 423 | static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int)); |
1ab3bf1b | 424 | |
e3be225e | 425 | static int open_proc_file PARAMS ((int, struct procinfo *, int)); |
1ab3bf1b | 426 | |
e3be225e | 427 | static void close_proc_file PARAMS ((struct procinfo *)); |
1ab3bf1b | 428 | |
e3be225e | 429 | static void unconditionally_kill_inferior PARAMS ((struct procinfo *)); |
1ab3bf1b | 430 | |
e3be225e | 431 | static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *)) ATTR_NORETURN; |
1ab3bf1b | 432 | |
e3be225e | 433 | static void info_proc PARAMS ((char *, int)); |
cc221e76 | 434 | |
e3be225e | 435 | static void info_proc_flags PARAMS ((struct procinfo *, int)); |
cc221e76 | 436 | |
e3be225e | 437 | static void info_proc_stop PARAMS ((struct procinfo *, int)); |
1ab3bf1b | 438 | |
e3be225e | 439 | static void info_proc_siginfo PARAMS ((struct procinfo *, int)); |
cc221e76 | 440 | |
e3be225e | 441 | static void info_proc_syscalls PARAMS ((struct procinfo *, int)); |
cc221e76 | 442 | |
e3be225e | 443 | static void info_proc_mappings PARAMS ((struct procinfo *, int)); |
cc221e76 | 444 | |
e3be225e | 445 | static void info_proc_signals PARAMS ((struct procinfo *, int)); |
cc221e76 | 446 | |
e3be225e | 447 | static void info_proc_faults PARAMS ((struct procinfo *, int)); |
1ab3bf1b | 448 | |
e3be225e | 449 | static char *mappingflags PARAMS ((long)); |
1ab3bf1b | 450 | |
e3be225e | 451 | static char *lookupname PARAMS ((struct trans *, unsigned int, char *)); |
cc221e76 | 452 | |
e3be225e | 453 | static char *lookupdesc PARAMS ((struct trans *, unsigned int)); |
cc221e76 | 454 | |
e3be225e | 455 | static int do_attach PARAMS ((int pid)); |
3fbdd536 | 456 | |
e3be225e | 457 | static void do_detach PARAMS ((int siggnal)); |
3fbdd536 | 458 | |
e3be225e | 459 | static void procfs_create_inferior PARAMS ((char *, char *, char **)); |
3fbdd536 | 460 | |
e3be225e | 461 | static void procfs_notice_signals PARAMS ((int pid)); |
de43d7d0 | 462 | |
e3be225e | 463 | static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail)); |
3950a34e | 464 | |
8fc2b417 SG |
465 | typedef int syscall_func_t PARAMS ((struct procinfo *pi, int syscall_num, |
466 | int why, int *rtnval, int *statval)); | |
467 | ||
468 | static void procfs_set_syscall_trap PARAMS ((struct procinfo *pi, | |
469 | int syscall_num, int flags, | |
470 | syscall_func_t *func)); | |
471 | ||
472 | static void procfs_clear_syscall_trap PARAMS ((struct procinfo *pi, | |
473 | int syscall_num, int errok)); | |
474 | ||
475 | #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */ | |
476 | #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */ | |
477 | ||
478 | static syscall_func_t procfs_exit_handler; | |
479 | ||
480 | static syscall_func_t procfs_exec_handler; | |
481 | ||
482 | #ifdef SYS_sproc | |
483 | static syscall_func_t procfs_sproc_handler; | |
484 | static syscall_func_t procfs_fork_handler; | |
485 | #endif | |
486 | ||
487 | #ifdef SYS_lwp_create | |
488 | static syscall_func_t procfs_lwp_creation_handler; | |
489 | #endif | |
490 | ||
491 | static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag)); | |
492 | static void modify_run_on_last_close_flag PARAMS ((int fd, int flag)); | |
493 | ||
494 | /* */ | |
495 | ||
496 | struct procfs_syscall_handler | |
497 | { | |
498 | int syscall_num; /* The number of the system call being handled */ | |
499 | /* The function to be called */ | |
500 | syscall_func_t *func; | |
501 | }; | |
502 | ||
503 | static void procfs_resume PARAMS ((int pid, int step, | |
504 | enum target_signal signo)); | |
505 | ||
1ab3bf1b JG |
506 | /* External function prototypes that can't be easily included in any |
507 | header file because the args are typedefs in system include files. */ | |
508 | ||
e3be225e | 509 | extern void supply_gregset PARAMS ((gregset_t *)); |
1ab3bf1b | 510 | |
e3be225e | 511 | extern void fill_gregset PARAMS ((gregset_t *, int)); |
1ab3bf1b | 512 | |
e3be225e | 513 | extern void supply_fpregset PARAMS ((fpregset_t *)); |
1ab3bf1b | 514 | |
e3be225e | 515 | extern void fill_fpregset PARAMS ((fpregset_t *, int)); |
35f5886e | 516 | |
cc221e76 FF |
517 | /* |
518 | ||
de43d7d0 SG |
519 | LOCAL FUNCTION |
520 | ||
521 | find_procinfo -- convert a process id to a struct procinfo | |
522 | ||
523 | SYNOPSIS | |
524 | ||
525 | static struct procinfo * find_procinfo (pid_t pid, int okfail); | |
526 | ||
527 | DESCRIPTION | |
528 | ||
529 | Given a process id, look it up in the procinfo chain. Returns | |
530 | a struct procinfo *. If can't find pid, then call error(), | |
531 | unless okfail is set, in which case, return NULL; | |
532 | */ | |
533 | ||
534 | static struct procinfo * | |
535 | find_procinfo (pid, okfail) | |
536 | pid_t pid; | |
537 | int okfail; | |
538 | { | |
539 | struct procinfo *procinfo; | |
540 | ||
541 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) | |
542 | if (procinfo->pid == pid) | |
543 | return procinfo; | |
544 | ||
545 | if (okfail) | |
546 | return NULL; | |
547 | ||
548 | error ("procfs (find_procinfo): Couldn't locate pid %d", pid); | |
549 | } | |
550 | ||
551 | /* | |
552 | ||
7c5d526e SG |
553 | LOCAL MACRO |
554 | ||
555 | current_procinfo -- convert inferior_pid to a struct procinfo | |
556 | ||
557 | SYNOPSIS | |
558 | ||
559 | static struct procinfo * current_procinfo; | |
560 | ||
561 | DESCRIPTION | |
562 | ||
563 | Looks up inferior_pid in the procinfo chain. Always returns a | |
564 | struct procinfo *. If process can't be found, we error() out. | |
565 | */ | |
566 | ||
567 | #define current_procinfo find_procinfo (inferior_pid, 0) | |
568 | ||
569 | /* | |
570 | ||
de43d7d0 SG |
571 | LOCAL FUNCTION |
572 | ||
573 | add_fd -- Add the fd to the poll/select list | |
574 | ||
575 | SYNOPSIS | |
576 | ||
577 | static void add_fd (struct procinfo *); | |
578 | ||
579 | DESCRIPTION | |
580 | ||
581 | Add the fd of the supplied procinfo to the list of fds used for | |
582 | poll/select operations. | |
583 | */ | |
584 | ||
585 | static void | |
586 | add_fd (pi) | |
587 | struct procinfo *pi; | |
588 | { | |
589 | if (num_poll_list <= 0) | |
590 | poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd)); | |
591 | else | |
592 | poll_list = (struct pollfd *) xrealloc (poll_list, | |
593 | (num_poll_list + 1) | |
594 | * sizeof (struct pollfd)); | |
595 | poll_list[num_poll_list].fd = pi->fd; | |
596 | poll_list[num_poll_list].events = POLLPRI; | |
597 | ||
598 | num_poll_list++; | |
599 | } | |
600 | ||
601 | static void | |
602 | remove_fd (pi) | |
603 | struct procinfo *pi; | |
604 | { | |
605 | int i; | |
606 | ||
607 | for (i = 0; i < num_poll_list; i++) | |
608 | { | |
609 | if (poll_list[i].fd == pi->fd) | |
610 | { | |
611 | if (i != num_poll_list - 1) | |
8fc2b417 | 612 | memcpy (poll_list + i, poll_list + i + 1, |
de43d7d0 SG |
613 | (num_poll_list - i - 1) * sizeof (struct pollfd)); |
614 | ||
615 | num_poll_list--; | |
616 | ||
617 | if (num_poll_list == 0) | |
618 | free (poll_list); | |
619 | else | |
620 | poll_list = (struct pollfd *) xrealloc (poll_list, | |
621 | num_poll_list | |
622 | * sizeof (struct pollfd)); | |
623 | return; | |
624 | } | |
625 | } | |
626 | } | |
627 | ||
7c5d526e SG |
628 | static struct procinfo * |
629 | wait_fd () | |
630 | { | |
631 | struct procinfo *pi; | |
b607efe7 | 632 | #ifndef LOSING_POLL |
7c5d526e SG |
633 | int num_fds; |
634 | int i; | |
b607efe7 | 635 | #endif |
de43d7d0 | 636 | |
1e75b5f5 | 637 | set_sigint_trap (); /* Causes SIGINT to be passed on to the |
7c5d526e | 638 | attached process. */ |
429f1c9f | 639 | set_sigio_trap (); |
de43d7d0 | 640 | |
7c5d526e SG |
641 | #ifndef LOSING_POLL |
642 | num_fds = poll (poll_list, num_poll_list, -1); | |
643 | #else | |
644 | pi = current_procinfo; | |
de43d7d0 | 645 | |
8afd05c0 | 646 | while (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) |
7c5d526e | 647 | { |
cef0333e PS |
648 | if (errno == ENOENT) |
649 | { | |
650 | /* Process exited. */ | |
651 | pi->prstatus.pr_flags = 0; | |
652 | break; | |
653 | } | |
654 | else if (errno != EINTR) | |
8afd05c0 JK |
655 | { |
656 | print_sys_errmsg (pi->pathname, errno); | |
657 | error ("PIOCWSTOP failed"); | |
658 | } | |
7c5d526e | 659 | } |
fb63d460 | 660 | pi->had_event = 1; |
7c5d526e SG |
661 | #endif |
662 | ||
1e75b5f5 | 663 | clear_sigint_trap (); |
429f1c9f | 664 | clear_sigio_trap (); |
de43d7d0 | 665 | |
7c5d526e | 666 | #ifndef LOSING_POLL |
de43d7d0 | 667 | |
7c5d526e SG |
668 | if (num_fds <= 0) |
669 | { | |
670 | print_sys_errmsg ("poll failed\n", errno); | |
671 | error ("Poll failed, returned %d", num_fds); | |
672 | } | |
673 | ||
674 | for (i = 0; i < num_poll_list && num_fds > 0; i++) | |
675 | { | |
676 | if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0) | |
677 | continue; | |
678 | for (pi = procinfo_list; pi; pi = pi->next) | |
679 | { | |
680 | if (poll_list[i].fd == pi->fd) | |
681 | { | |
682 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) | |
683 | { | |
684 | print_sys_errmsg (pi->pathname, errno); | |
685 | error ("PIOCSTATUS failed"); | |
686 | } | |
687 | num_fds--; | |
688 | pi->had_event = 1; | |
689 | break; | |
690 | } | |
691 | } | |
692 | if (!pi) | |
8fc2b417 | 693 | error ("wait_fd: Couldn't find procinfo for fd %d\n", |
7c5d526e SG |
694 | poll_list[i].fd); |
695 | } | |
696 | #endif /* LOSING_POLL */ | |
697 | ||
698 | return pi; | |
699 | } | |
de43d7d0 SG |
700 | |
701 | /* | |
702 | ||
cc221e76 FF |
703 | LOCAL FUNCTION |
704 | ||
705 | lookupdesc -- translate a value to a summary desc string | |
706 | ||
707 | SYNOPSIS | |
708 | ||
709 | static char *lookupdesc (struct trans *transp, unsigned int val); | |
710 | ||
711 | DESCRIPTION | |
712 | ||
713 | Given a pointer to a translation table and a value to be translated, | |
714 | lookup the desc string and return it. | |
715 | */ | |
716 | ||
717 | static char * | |
718 | lookupdesc (transp, val) | |
719 | struct trans *transp; | |
720 | unsigned int val; | |
721 | { | |
722 | char *desc; | |
723 | ||
724 | for (desc = NULL; transp -> name != NULL; transp++) | |
725 | { | |
726 | if (transp -> value == val) | |
727 | { | |
728 | desc = transp -> desc; | |
729 | break; | |
730 | } | |
731 | } | |
732 | ||
733 | /* Didn't find a translation for the specified value, set a default one. */ | |
734 | ||
735 | if (desc == NULL) | |
736 | { | |
737 | desc = "Unknown"; | |
738 | } | |
739 | return (desc); | |
740 | } | |
741 | ||
742 | /* | |
743 | ||
744 | LOCAL FUNCTION | |
745 | ||
746 | lookupname -- translate a value to symbolic name | |
747 | ||
748 | SYNOPSIS | |
749 | ||
750 | static char *lookupname (struct trans *transp, unsigned int val, | |
751 | char *prefix); | |
752 | ||
753 | DESCRIPTION | |
754 | ||
755 | Given a pointer to a translation table, a value to be translated, | |
756 | and a default prefix to return if the value can't be translated, | |
757 | match the value with one of the translation table entries and | |
758 | return a pointer to the symbolic name. | |
759 | ||
760 | If no match is found it just returns the value as a printable string, | |
761 | with the given prefix. The previous such value, if any, is freed | |
762 | at this time. | |
763 | */ | |
764 | ||
765 | static char * | |
766 | lookupname (transp, val, prefix) | |
767 | struct trans *transp; | |
768 | unsigned int val; | |
769 | char *prefix; | |
770 | { | |
771 | static char *locbuf; | |
772 | char *name; | |
773 | ||
774 | for (name = NULL; transp -> name != NULL; transp++) | |
775 | { | |
776 | if (transp -> value == val) | |
777 | { | |
778 | name = transp -> name; | |
779 | break; | |
780 | } | |
781 | } | |
782 | ||
783 | /* Didn't find a translation for the specified value, build a default | |
784 | one using the specified prefix and return it. The lifetime of | |
785 | the value is only until the next one is needed. */ | |
786 | ||
787 | if (name == NULL) | |
788 | { | |
789 | if (locbuf != NULL) | |
790 | { | |
791 | free (locbuf); | |
792 | } | |
793 | locbuf = xmalloc (strlen (prefix) + 16); | |
4ed3a9ea | 794 | sprintf (locbuf, "%s %u", prefix, val); |
cc221e76 FF |
795 | name = locbuf; |
796 | } | |
797 | return (name); | |
798 | } | |
799 | ||
800 | static char * | |
801 | sigcodename (sip) | |
802 | siginfo_t *sip; | |
803 | { | |
804 | struct sigcode *scp; | |
805 | char *name = NULL; | |
806 | static char locbuf[32]; | |
807 | ||
808 | for (scp = siginfo_table; scp -> codename != NULL; scp++) | |
809 | { | |
810 | if ((scp -> signo == sip -> si_signo) && | |
811 | (scp -> code == sip -> si_code)) | |
812 | { | |
813 | name = scp -> codename; | |
814 | break; | |
815 | } | |
816 | } | |
817 | if (name == NULL) | |
818 | { | |
4ed3a9ea | 819 | sprintf (locbuf, "sigcode %u", sip -> si_signo); |
cc221e76 FF |
820 | name = locbuf; |
821 | } | |
822 | return (name); | |
823 | } | |
824 | ||
3fbdd536 JG |
825 | static char * |
826 | sigcodedesc (sip) | |
cc221e76 FF |
827 | siginfo_t *sip; |
828 | { | |
829 | struct sigcode *scp; | |
830 | char *desc = NULL; | |
831 | ||
832 | for (scp = siginfo_table; scp -> codename != NULL; scp++) | |
833 | { | |
834 | if ((scp -> signo == sip -> si_signo) && | |
835 | (scp -> code == sip -> si_code)) | |
836 | { | |
837 | desc = scp -> desc; | |
838 | break; | |
839 | } | |
840 | } | |
841 | if (desc == NULL) | |
842 | { | |
843 | desc = "Unrecognized signal or trap use"; | |
844 | } | |
845 | return (desc); | |
846 | } | |
847 | ||
848 | /* | |
849 | ||
850 | LOCAL FUNCTION | |
851 | ||
852 | syscallname - translate a system call number into a system call name | |
853 | ||
854 | SYNOPSIS | |
855 | ||
856 | char *syscallname (int syscallnum) | |
857 | ||
858 | DESCRIPTION | |
859 | ||
860 | Given a system call number, translate it into the printable name | |
861 | of a system call, or into "syscall <num>" if it is an unknown | |
862 | number. | |
863 | */ | |
864 | ||
865 | static char * | |
866 | syscallname (syscallnum) | |
867 | int syscallnum; | |
868 | { | |
869 | static char locbuf[32]; | |
cc221e76 | 870 | |
8fc2b417 SG |
871 | if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS |
872 | && syscall_table[syscallnum] != NULL) | |
873 | return syscall_table[syscallnum]; | |
cc221e76 FF |
874 | else |
875 | { | |
4ed3a9ea | 876 | sprintf (locbuf, "syscall %u", syscallnum); |
8fc2b417 | 877 | return locbuf; |
cc221e76 | 878 | } |
cc221e76 FF |
879 | } |
880 | ||
881 | /* | |
882 | ||
883 | LOCAL FUNCTION | |
884 | ||
885 | init_syscall_table - initialize syscall translation table | |
886 | ||
887 | SYNOPSIS | |
888 | ||
889 | void init_syscall_table (void) | |
890 | ||
891 | DESCRIPTION | |
892 | ||
893 | Dynamically initialize the translation table to convert system | |
894 | call numbers into printable system call names. Done once per | |
895 | gdb run, on initialization. | |
896 | ||
897 | NOTES | |
898 | ||
899 | This is awfully ugly, but preprocessor tricks to make it prettier | |
900 | tend to be nonportable. | |
901 | */ | |
902 | ||
903 | static void | |
904 | init_syscall_table () | |
905 | { | |
cc221e76 FF |
906 | #if defined (SYS_exit) |
907 | syscall_table[SYS_exit] = "exit"; | |
908 | #endif | |
909 | #if defined (SYS_fork) | |
910 | syscall_table[SYS_fork] = "fork"; | |
911 | #endif | |
912 | #if defined (SYS_read) | |
913 | syscall_table[SYS_read] = "read"; | |
914 | #endif | |
915 | #if defined (SYS_write) | |
916 | syscall_table[SYS_write] = "write"; | |
917 | #endif | |
918 | #if defined (SYS_open) | |
919 | syscall_table[SYS_open] = "open"; | |
920 | #endif | |
921 | #if defined (SYS_close) | |
922 | syscall_table[SYS_close] = "close"; | |
923 | #endif | |
924 | #if defined (SYS_wait) | |
925 | syscall_table[SYS_wait] = "wait"; | |
926 | #endif | |
927 | #if defined (SYS_creat) | |
928 | syscall_table[SYS_creat] = "creat"; | |
929 | #endif | |
930 | #if defined (SYS_link) | |
931 | syscall_table[SYS_link] = "link"; | |
932 | #endif | |
933 | #if defined (SYS_unlink) | |
934 | syscall_table[SYS_unlink] = "unlink"; | |
935 | #endif | |
936 | #if defined (SYS_exec) | |
937 | syscall_table[SYS_exec] = "exec"; | |
938 | #endif | |
939 | #if defined (SYS_execv) | |
940 | syscall_table[SYS_execv] = "execv"; | |
941 | #endif | |
942 | #if defined (SYS_execve) | |
943 | syscall_table[SYS_execve] = "execve"; | |
944 | #endif | |
945 | #if defined (SYS_chdir) | |
946 | syscall_table[SYS_chdir] = "chdir"; | |
947 | #endif | |
948 | #if defined (SYS_time) | |
949 | syscall_table[SYS_time] = "time"; | |
950 | #endif | |
951 | #if defined (SYS_mknod) | |
952 | syscall_table[SYS_mknod] = "mknod"; | |
953 | #endif | |
954 | #if defined (SYS_chmod) | |
955 | syscall_table[SYS_chmod] = "chmod"; | |
956 | #endif | |
957 | #if defined (SYS_chown) | |
958 | syscall_table[SYS_chown] = "chown"; | |
959 | #endif | |
960 | #if defined (SYS_brk) | |
961 | syscall_table[SYS_brk] = "brk"; | |
962 | #endif | |
963 | #if defined (SYS_stat) | |
964 | syscall_table[SYS_stat] = "stat"; | |
965 | #endif | |
966 | #if defined (SYS_lseek) | |
967 | syscall_table[SYS_lseek] = "lseek"; | |
968 | #endif | |
969 | #if defined (SYS_getpid) | |
970 | syscall_table[SYS_getpid] = "getpid"; | |
971 | #endif | |
972 | #if defined (SYS_mount) | |
973 | syscall_table[SYS_mount] = "mount"; | |
974 | #endif | |
975 | #if defined (SYS_umount) | |
976 | syscall_table[SYS_umount] = "umount"; | |
977 | #endif | |
978 | #if defined (SYS_setuid) | |
979 | syscall_table[SYS_setuid] = "setuid"; | |
980 | #endif | |
981 | #if defined (SYS_getuid) | |
982 | syscall_table[SYS_getuid] = "getuid"; | |
983 | #endif | |
984 | #if defined (SYS_stime) | |
985 | syscall_table[SYS_stime] = "stime"; | |
986 | #endif | |
987 | #if defined (SYS_ptrace) | |
988 | syscall_table[SYS_ptrace] = "ptrace"; | |
989 | #endif | |
990 | #if defined (SYS_alarm) | |
991 | syscall_table[SYS_alarm] = "alarm"; | |
992 | #endif | |
993 | #if defined (SYS_fstat) | |
994 | syscall_table[SYS_fstat] = "fstat"; | |
995 | #endif | |
996 | #if defined (SYS_pause) | |
997 | syscall_table[SYS_pause] = "pause"; | |
998 | #endif | |
999 | #if defined (SYS_utime) | |
1000 | syscall_table[SYS_utime] = "utime"; | |
1001 | #endif | |
1002 | #if defined (SYS_stty) | |
1003 | syscall_table[SYS_stty] = "stty"; | |
1004 | #endif | |
1005 | #if defined (SYS_gtty) | |
1006 | syscall_table[SYS_gtty] = "gtty"; | |
1007 | #endif | |
1008 | #if defined (SYS_access) | |
1009 | syscall_table[SYS_access] = "access"; | |
1010 | #endif | |
1011 | #if defined (SYS_nice) | |
1012 | syscall_table[SYS_nice] = "nice"; | |
1013 | #endif | |
1014 | #if defined (SYS_statfs) | |
1015 | syscall_table[SYS_statfs] = "statfs"; | |
1016 | #endif | |
1017 | #if defined (SYS_sync) | |
1018 | syscall_table[SYS_sync] = "sync"; | |
1019 | #endif | |
1020 | #if defined (SYS_kill) | |
1021 | syscall_table[SYS_kill] = "kill"; | |
1022 | #endif | |
1023 | #if defined (SYS_fstatfs) | |
1024 | syscall_table[SYS_fstatfs] = "fstatfs"; | |
1025 | #endif | |
1026 | #if defined (SYS_pgrpsys) | |
1027 | syscall_table[SYS_pgrpsys] = "pgrpsys"; | |
1028 | #endif | |
1029 | #if defined (SYS_xenix) | |
1030 | syscall_table[SYS_xenix] = "xenix"; | |
1031 | #endif | |
1032 | #if defined (SYS_dup) | |
1033 | syscall_table[SYS_dup] = "dup"; | |
1034 | #endif | |
1035 | #if defined (SYS_pipe) | |
1036 | syscall_table[SYS_pipe] = "pipe"; | |
1037 | #endif | |
1038 | #if defined (SYS_times) | |
1039 | syscall_table[SYS_times] = "times"; | |
1040 | #endif | |
1041 | #if defined (SYS_profil) | |
1042 | syscall_table[SYS_profil] = "profil"; | |
1043 | #endif | |
1044 | #if defined (SYS_plock) | |
1045 | syscall_table[SYS_plock] = "plock"; | |
1046 | #endif | |
1047 | #if defined (SYS_setgid) | |
1048 | syscall_table[SYS_setgid] = "setgid"; | |
1049 | #endif | |
1050 | #if defined (SYS_getgid) | |
1051 | syscall_table[SYS_getgid] = "getgid"; | |
1052 | #endif | |
1053 | #if defined (SYS_signal) | |
1054 | syscall_table[SYS_signal] = "signal"; | |
1055 | #endif | |
1056 | #if defined (SYS_msgsys) | |
1057 | syscall_table[SYS_msgsys] = "msgsys"; | |
1058 | #endif | |
1059 | #if defined (SYS_sys3b) | |
1060 | syscall_table[SYS_sys3b] = "sys3b"; | |
1061 | #endif | |
1062 | #if defined (SYS_acct) | |
1063 | syscall_table[SYS_acct] = "acct"; | |
1064 | #endif | |
1065 | #if defined (SYS_shmsys) | |
1066 | syscall_table[SYS_shmsys] = "shmsys"; | |
1067 | #endif | |
1068 | #if defined (SYS_semsys) | |
1069 | syscall_table[SYS_semsys] = "semsys"; | |
1070 | #endif | |
1071 | #if defined (SYS_ioctl) | |
1072 | syscall_table[SYS_ioctl] = "ioctl"; | |
1073 | #endif | |
1074 | #if defined (SYS_uadmin) | |
1075 | syscall_table[SYS_uadmin] = "uadmin"; | |
1076 | #endif | |
1077 | #if defined (SYS_utssys) | |
1078 | syscall_table[SYS_utssys] = "utssys"; | |
1079 | #endif | |
1080 | #if defined (SYS_fsync) | |
1081 | syscall_table[SYS_fsync] = "fsync"; | |
1082 | #endif | |
1083 | #if defined (SYS_umask) | |
1084 | syscall_table[SYS_umask] = "umask"; | |
1085 | #endif | |
1086 | #if defined (SYS_chroot) | |
1087 | syscall_table[SYS_chroot] = "chroot"; | |
1088 | #endif | |
1089 | #if defined (SYS_fcntl) | |
1090 | syscall_table[SYS_fcntl] = "fcntl"; | |
1091 | #endif | |
1092 | #if defined (SYS_ulimit) | |
1093 | syscall_table[SYS_ulimit] = "ulimit"; | |
1094 | #endif | |
1095 | #if defined (SYS_rfsys) | |
1096 | syscall_table[SYS_rfsys] = "rfsys"; | |
1097 | #endif | |
1098 | #if defined (SYS_rmdir) | |
1099 | syscall_table[SYS_rmdir] = "rmdir"; | |
1100 | #endif | |
1101 | #if defined (SYS_mkdir) | |
1102 | syscall_table[SYS_mkdir] = "mkdir"; | |
1103 | #endif | |
1104 | #if defined (SYS_getdents) | |
1105 | syscall_table[SYS_getdents] = "getdents"; | |
1106 | #endif | |
1107 | #if defined (SYS_sysfs) | |
1108 | syscall_table[SYS_sysfs] = "sysfs"; | |
1109 | #endif | |
1110 | #if defined (SYS_getmsg) | |
1111 | syscall_table[SYS_getmsg] = "getmsg"; | |
1112 | #endif | |
1113 | #if defined (SYS_putmsg) | |
1114 | syscall_table[SYS_putmsg] = "putmsg"; | |
1115 | #endif | |
1116 | #if defined (SYS_poll) | |
1117 | syscall_table[SYS_poll] = "poll"; | |
1118 | #endif | |
1119 | #if defined (SYS_lstat) | |
1120 | syscall_table[SYS_lstat] = "lstat"; | |
1121 | #endif | |
1122 | #if defined (SYS_symlink) | |
1123 | syscall_table[SYS_symlink] = "symlink"; | |
1124 | #endif | |
1125 | #if defined (SYS_readlink) | |
1126 | syscall_table[SYS_readlink] = "readlink"; | |
1127 | #endif | |
1128 | #if defined (SYS_setgroups) | |
1129 | syscall_table[SYS_setgroups] = "setgroups"; | |
1130 | #endif | |
1131 | #if defined (SYS_getgroups) | |
1132 | syscall_table[SYS_getgroups] = "getgroups"; | |
1133 | #endif | |
1134 | #if defined (SYS_fchmod) | |
1135 | syscall_table[SYS_fchmod] = "fchmod"; | |
1136 | #endif | |
1137 | #if defined (SYS_fchown) | |
1138 | syscall_table[SYS_fchown] = "fchown"; | |
1139 | #endif | |
1140 | #if defined (SYS_sigprocmask) | |
1141 | syscall_table[SYS_sigprocmask] = "sigprocmask"; | |
1142 | #endif | |
1143 | #if defined (SYS_sigsuspend) | |
1144 | syscall_table[SYS_sigsuspend] = "sigsuspend"; | |
1145 | #endif | |
1146 | #if defined (SYS_sigaltstack) | |
1147 | syscall_table[SYS_sigaltstack] = "sigaltstack"; | |
1148 | #endif | |
1149 | #if defined (SYS_sigaction) | |
1150 | syscall_table[SYS_sigaction] = "sigaction"; | |
1151 | #endif | |
1152 | #if defined (SYS_sigpending) | |
1153 | syscall_table[SYS_sigpending] = "sigpending"; | |
1154 | #endif | |
1155 | #if defined (SYS_context) | |
1156 | syscall_table[SYS_context] = "context"; | |
1157 | #endif | |
1158 | #if defined (SYS_evsys) | |
1159 | syscall_table[SYS_evsys] = "evsys"; | |
1160 | #endif | |
1161 | #if defined (SYS_evtrapret) | |
1162 | syscall_table[SYS_evtrapret] = "evtrapret"; | |
1163 | #endif | |
1164 | #if defined (SYS_statvfs) | |
1165 | syscall_table[SYS_statvfs] = "statvfs"; | |
1166 | #endif | |
1167 | #if defined (SYS_fstatvfs) | |
1168 | syscall_table[SYS_fstatvfs] = "fstatvfs"; | |
1169 | #endif | |
1170 | #if defined (SYS_nfssys) | |
1171 | syscall_table[SYS_nfssys] = "nfssys"; | |
1172 | #endif | |
1173 | #if defined (SYS_waitsys) | |
1174 | syscall_table[SYS_waitsys] = "waitsys"; | |
1175 | #endif | |
1176 | #if defined (SYS_sigsendsys) | |
1177 | syscall_table[SYS_sigsendsys] = "sigsendsys"; | |
1178 | #endif | |
1179 | #if defined (SYS_hrtsys) | |
1180 | syscall_table[SYS_hrtsys] = "hrtsys"; | |
1181 | #endif | |
1182 | #if defined (SYS_acancel) | |
1183 | syscall_table[SYS_acancel] = "acancel"; | |
1184 | #endif | |
1185 | #if defined (SYS_async) | |
1186 | syscall_table[SYS_async] = "async"; | |
1187 | #endif | |
1188 | #if defined (SYS_priocntlsys) | |
1189 | syscall_table[SYS_priocntlsys] = "priocntlsys"; | |
1190 | #endif | |
1191 | #if defined (SYS_pathconf) | |
1192 | syscall_table[SYS_pathconf] = "pathconf"; | |
1193 | #endif | |
1194 | #if defined (SYS_mincore) | |
1195 | syscall_table[SYS_mincore] = "mincore"; | |
1196 | #endif | |
1197 | #if defined (SYS_mmap) | |
1198 | syscall_table[SYS_mmap] = "mmap"; | |
1199 | #endif | |
1200 | #if defined (SYS_mprotect) | |
1201 | syscall_table[SYS_mprotect] = "mprotect"; | |
1202 | #endif | |
1203 | #if defined (SYS_munmap) | |
1204 | syscall_table[SYS_munmap] = "munmap"; | |
1205 | #endif | |
1206 | #if defined (SYS_fpathconf) | |
1207 | syscall_table[SYS_fpathconf] = "fpathconf"; | |
1208 | #endif | |
1209 | #if defined (SYS_vfork) | |
1210 | syscall_table[SYS_vfork] = "vfork"; | |
1211 | #endif | |
1212 | #if defined (SYS_fchdir) | |
1213 | syscall_table[SYS_fchdir] = "fchdir"; | |
1214 | #endif | |
1215 | #if defined (SYS_readv) | |
1216 | syscall_table[SYS_readv] = "readv"; | |
1217 | #endif | |
1218 | #if defined (SYS_writev) | |
1219 | syscall_table[SYS_writev] = "writev"; | |
1220 | #endif | |
1221 | #if defined (SYS_xstat) | |
1222 | syscall_table[SYS_xstat] = "xstat"; | |
1223 | #endif | |
1224 | #if defined (SYS_lxstat) | |
1225 | syscall_table[SYS_lxstat] = "lxstat"; | |
1226 | #endif | |
1227 | #if defined (SYS_fxstat) | |
1228 | syscall_table[SYS_fxstat] = "fxstat"; | |
1229 | #endif | |
1230 | #if defined (SYS_xmknod) | |
1231 | syscall_table[SYS_xmknod] = "xmknod"; | |
1232 | #endif | |
1233 | #if defined (SYS_clocal) | |
1234 | syscall_table[SYS_clocal] = "clocal"; | |
1235 | #endif | |
1236 | #if defined (SYS_setrlimit) | |
1237 | syscall_table[SYS_setrlimit] = "setrlimit"; | |
1238 | #endif | |
1239 | #if defined (SYS_getrlimit) | |
1240 | syscall_table[SYS_getrlimit] = "getrlimit"; | |
1241 | #endif | |
1242 | #if defined (SYS_lchown) | |
1243 | syscall_table[SYS_lchown] = "lchown"; | |
1244 | #endif | |
1245 | #if defined (SYS_memcntl) | |
1246 | syscall_table[SYS_memcntl] = "memcntl"; | |
1247 | #endif | |
1248 | #if defined (SYS_getpmsg) | |
1249 | syscall_table[SYS_getpmsg] = "getpmsg"; | |
1250 | #endif | |
1251 | #if defined (SYS_putpmsg) | |
1252 | syscall_table[SYS_putpmsg] = "putpmsg"; | |
1253 | #endif | |
1254 | #if defined (SYS_rename) | |
1255 | syscall_table[SYS_rename] = "rename"; | |
1256 | #endif | |
1257 | #if defined (SYS_uname) | |
1258 | syscall_table[SYS_uname] = "uname"; | |
1259 | #endif | |
1260 | #if defined (SYS_setegid) | |
1261 | syscall_table[SYS_setegid] = "setegid"; | |
1262 | #endif | |
1263 | #if defined (SYS_sysconfig) | |
1264 | syscall_table[SYS_sysconfig] = "sysconfig"; | |
1265 | #endif | |
1266 | #if defined (SYS_adjtime) | |
1267 | syscall_table[SYS_adjtime] = "adjtime"; | |
1268 | #endif | |
1269 | #if defined (SYS_systeminfo) | |
1270 | syscall_table[SYS_systeminfo] = "systeminfo"; | |
1271 | #endif | |
1272 | #if defined (SYS_seteuid) | |
1273 | syscall_table[SYS_seteuid] = "seteuid"; | |
1274 | #endif | |
de43d7d0 SG |
1275 | #if defined (SYS_sproc) |
1276 | syscall_table[SYS_sproc] = "sproc"; | |
1277 | #endif | |
cc221e76 | 1278 | } |
35f5886e FF |
1279 | |
1280 | /* | |
1281 | ||
3fbdd536 | 1282 | LOCAL FUNCTION |
35f5886e | 1283 | |
3fbdd536 | 1284 | procfs_kill_inferior - kill any currently inferior |
35f5886e FF |
1285 | |
1286 | SYNOPSIS | |
1287 | ||
3fbdd536 | 1288 | void procfs_kill_inferior (void) |
35f5886e FF |
1289 | |
1290 | DESCRIPTION | |
1291 | ||
1292 | Kill any current inferior. | |
1293 | ||
1294 | NOTES | |
1295 | ||
1296 | Kills even attached inferiors. Presumably the user has already | |
1297 | been prompted that the inferior is an attached one rather than | |
1298 | one started by gdb. (FIXME?) | |
1299 | ||
1300 | */ | |
1301 | ||
3fbdd536 JG |
1302 | static void |
1303 | procfs_kill_inferior () | |
35f5886e | 1304 | { |
de43d7d0 | 1305 | target_mourn_inferior (); |
35f5886e FF |
1306 | } |
1307 | ||
1308 | /* | |
1309 | ||
1310 | LOCAL FUNCTION | |
1311 | ||
1312 | unconditionally_kill_inferior - terminate the inferior | |
1313 | ||
1314 | SYNOPSIS | |
1315 | ||
de43d7d0 | 1316 | static void unconditionally_kill_inferior (struct procinfo *) |
35f5886e FF |
1317 | |
1318 | DESCRIPTION | |
1319 | ||
de43d7d0 | 1320 | Kill the specified inferior. |
35f5886e FF |
1321 | |
1322 | NOTE | |
1323 | ||
1324 | A possibly useful enhancement would be to first try sending | |
1325 | the inferior a terminate signal, politely asking it to commit | |
de43d7d0 SG |
1326 | suicide, before we murder it (we could call that |
1327 | politely_kill_inferior()). | |
35f5886e FF |
1328 | |
1329 | */ | |
1330 | ||
1331 | static void | |
de43d7d0 SG |
1332 | unconditionally_kill_inferior (pi) |
1333 | struct procinfo *pi; | |
35f5886e FF |
1334 | { |
1335 | int signo; | |
de43d7d0 | 1336 | int ppid; |
35f5886e | 1337 | |
de43d7d0 SG |
1338 | ppid = pi->prstatus.pr_ppid; |
1339 | ||
35f5886e | 1340 | signo = SIGKILL; |
2592eef8 | 1341 | |
b6753b3f PS |
1342 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL |
1343 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
1344 | before the PIOCKILL, otherwise it might generate a corrupted core | |
1345 | file for the inferior. */ | |
1346 | ioctl (pi->fd, PIOCSSIG, NULL); | |
1347 | #endif | |
2592eef8 | 1348 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL |
b6753b3f | 1349 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal |
f5de4904 PS |
1350 | to kill the inferior, otherwise it might remain stopped with a |
1351 | pending SIGKILL. | |
2592eef8 PS |
1352 | We do not check the result of the PIOCSSIG, the inferior might have |
1353 | died already. */ | |
1354 | { | |
1355 | struct siginfo newsiginfo; | |
1356 | ||
1357 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); | |
1358 | newsiginfo.si_signo = signo; | |
1359 | newsiginfo.si_code = 0; | |
1360 | newsiginfo.si_errno = 0; | |
1361 | newsiginfo.si_pid = getpid (); | |
1362 | newsiginfo.si_uid = getuid (); | |
1363 | ioctl (pi->fd, PIOCSSIG, &newsiginfo); | |
1364 | } | |
f5de4904 PS |
1365 | #else |
1366 | ioctl (pi->fd, PIOCKILL, &signo); | |
2592eef8 PS |
1367 | #endif |
1368 | ||
de43d7d0 SG |
1369 | close_proc_file (pi); |
1370 | ||
1371 | /* Only wait() for our direct children. Our grandchildren zombies are killed | |
1372 | by the death of their parents. */ | |
1373 | ||
1374 | if (ppid == getpid()) | |
1375 | wait ((int *) 0); | |
35f5886e FF |
1376 | } |
1377 | ||
1378 | /* | |
1379 | ||
3fbdd536 | 1380 | LOCAL FUNCTION |
35f5886e | 1381 | |
3fbdd536 | 1382 | procfs_xfer_memory -- copy data to or from inferior memory space |
35f5886e FF |
1383 | |
1384 | SYNOPSIS | |
1385 | ||
3fbdd536 | 1386 | int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, |
35f5886e FF |
1387 | int dowrite, struct target_ops target) |
1388 | ||
1389 | DESCRIPTION | |
1390 | ||
1391 | Copy LEN bytes to/from inferior's memory starting at MEMADDR | |
1392 | from/to debugger memory starting at MYADDR. Copy from inferior | |
1393 | if DOWRITE is zero or to inferior if DOWRITE is nonzero. | |
1394 | ||
1395 | Returns the length copied, which is either the LEN argument or | |
3fbdd536 | 1396 | zero. This xfer function does not do partial moves, since procfs_ops |
35f5886e FF |
1397 | doesn't allow memory operations to cross below us in the target stack |
1398 | anyway. | |
1399 | ||
1400 | NOTES | |
1401 | ||
1402 | The /proc interface makes this an almost trivial task. | |
1403 | */ | |
1404 | ||
3fbdd536 JG |
1405 | static int |
1406 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) | |
1ab3bf1b JG |
1407 | CORE_ADDR memaddr; |
1408 | char *myaddr; | |
1409 | int len; | |
1410 | int dowrite; | |
1411 | struct target_ops *target; /* ignored */ | |
35f5886e FF |
1412 | { |
1413 | int nbytes = 0; | |
de43d7d0 | 1414 | struct procinfo *pi; |
35f5886e | 1415 | |
de43d7d0 SG |
1416 | pi = current_procinfo; |
1417 | ||
1418 | if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr) | |
35f5886e FF |
1419 | { |
1420 | if (dowrite) | |
1421 | { | |
de43d7d0 | 1422 | nbytes = write (pi->fd, myaddr, len); |
35f5886e FF |
1423 | } |
1424 | else | |
1425 | { | |
de43d7d0 | 1426 | nbytes = read (pi->fd, myaddr, len); |
35f5886e FF |
1427 | } |
1428 | if (nbytes < 0) | |
1429 | { | |
1430 | nbytes = 0; | |
1431 | } | |
1432 | } | |
1433 | return (nbytes); | |
1434 | } | |
1435 | ||
1436 | /* | |
1437 | ||
3fbdd536 | 1438 | LOCAL FUNCTION |
35f5886e | 1439 | |
3fbdd536 | 1440 | procfs_store_registers -- copy register values back to inferior |
35f5886e FF |
1441 | |
1442 | SYNOPSIS | |
1443 | ||
3fbdd536 | 1444 | void procfs_store_registers (int regno) |
35f5886e FF |
1445 | |
1446 | DESCRIPTION | |
1447 | ||
1448 | Store our current register values back into the inferior. If | |
1449 | REGNO is -1 then store all the register, otherwise store just | |
1450 | the value specified by REGNO. | |
1451 | ||
1452 | NOTES | |
1453 | ||
1454 | If we are storing only a single register, we first have to get all | |
1455 | the current values from the process, overwrite the desired register | |
1456 | in the gregset with the one we want from gdb's registers, and then | |
1457 | send the whole set back to the process. For writing all the | |
1458 | registers, all we have to do is generate the gregset and send it to | |
1459 | the process. | |
1460 | ||
1461 | Also note that the process has to be stopped on an event of interest | |
1462 | for this to work, which basically means that it has to have been | |
1463 | run under the control of one of the other /proc ioctl calls and not | |
1464 | ptrace. Since we don't use ptrace anyway, we don't worry about this | |
1465 | fine point, but it is worth noting for future reference. | |
1466 | ||
1467 | Gdb is confused about what this function is supposed to return. | |
1468 | Some versions return a value, others return nothing. Some are | |
1469 | declared to return a value and actually return nothing. Gdb ignores | |
1470 | anything returned. (FIXME) | |
1471 | ||
1472 | */ | |
1473 | ||
3fbdd536 JG |
1474 | static void |
1475 | procfs_store_registers (regno) | |
1ab3bf1b | 1476 | int regno; |
35f5886e | 1477 | { |
de43d7d0 SG |
1478 | struct procinfo *pi; |
1479 | ||
1480 | pi = current_procinfo; | |
1481 | ||
35f5886e FF |
1482 | if (regno != -1) |
1483 | { | |
de43d7d0 | 1484 | ioctl (pi->fd, PIOCGREG, &pi->gregset); |
35f5886e | 1485 | } |
de43d7d0 SG |
1486 | fill_gregset (&pi->gregset, regno); |
1487 | ioctl (pi->fd, PIOCSREG, &pi->gregset); | |
35f5886e FF |
1488 | |
1489 | #if defined (FP0_REGNUM) | |
1490 | ||
1491 | /* Now repeat everything using the floating point register set, if the | |
1492 | target has floating point hardware. Since we ignore the returned value, | |
1493 | we'll never know whether it worked or not anyway. */ | |
1494 | ||
1495 | if (regno != -1) | |
1496 | { | |
de43d7d0 | 1497 | ioctl (pi->fd, PIOCGFPREG, &pi->fpregset); |
35f5886e | 1498 | } |
de43d7d0 SG |
1499 | fill_fpregset (&pi->fpregset, regno); |
1500 | ioctl (pi->fd, PIOCSFPREG, &pi->fpregset); | |
35f5886e FF |
1501 | |
1502 | #endif /* FP0_REGNUM */ | |
1503 | ||
1504 | } | |
1505 | ||
1506 | /* | |
1507 | ||
3fbdd536 | 1508 | LOCAL FUNCTION |
35f5886e | 1509 | |
de43d7d0 SG |
1510 | create_procinfo - initialize access to a /proc entry |
1511 | ||
1512 | SYNOPSIS | |
1513 | ||
eca4a350 | 1514 | struct procinfo * create_procinfo (int pid) |
de43d7d0 SG |
1515 | |
1516 | DESCRIPTION | |
1517 | ||
eca4a350 SG |
1518 | Allocate a procinfo structure, open the /proc file and then set up the |
1519 | set of signals and faults that are to be traced. Returns a pointer to | |
1520 | the new procinfo structure. | |
de43d7d0 SG |
1521 | |
1522 | NOTES | |
1523 | ||
1524 | If proc_init_failed ever gets called, control returns to the command | |
1525 | processing loop via the standard error handling code. | |
1526 | ||
1527 | */ | |
1528 | ||
eca4a350 | 1529 | static struct procinfo * |
de43d7d0 SG |
1530 | create_procinfo (pid) |
1531 | int pid; | |
1532 | { | |
1533 | struct procinfo *pi; | |
1534 | ||
2592eef8 PS |
1535 | pi = find_procinfo (pid, 1); |
1536 | if (pi != NULL) | |
1537 | return pi; /* All done! It already exists */ | |
de43d7d0 SG |
1538 | |
1539 | pi = (struct procinfo *) xmalloc (sizeof (struct procinfo)); | |
1540 | ||
1541 | if (!open_proc_file (pid, pi, O_RDWR)) | |
1542 | proc_init_failed (pi, "can't open process file"); | |
1543 | ||
8fc2b417 SG |
1544 | /* open_proc_file may modify pid. */ |
1545 | ||
1546 | pid = pi -> pid; | |
1547 | ||
de43d7d0 SG |
1548 | /* Add new process to process info list */ |
1549 | ||
1550 | pi->next = procinfo_list; | |
1551 | procinfo_list = pi; | |
1552 | ||
1553 | add_fd (pi); /* Add to list for poll/select */ | |
1554 | ||
8fc2b417 SG |
1555 | pi->num_syscall_handlers = 0; |
1556 | pi->syscall_handlers = NULL; | |
de43d7d0 SG |
1557 | memset ((char *) &pi->prrun, 0, sizeof (pi->prrun)); |
1558 | prfillset (&pi->prrun.pr_trace); | |
1559 | procfs_notice_signals (pid); | |
1560 | prfillset (&pi->prrun.pr_fault); | |
1561 | prdelset (&pi->prrun.pr_fault, FLTPAGE); | |
1562 | ||
b9e58503 PS |
1563 | #ifdef PROCFS_DONT_TRACE_FAULTS |
1564 | premptyset (&pi->prrun.pr_fault); | |
2592eef8 PS |
1565 | #endif |
1566 | ||
8fc2b417 SG |
1567 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
1568 | proc_init_failed (pi, "PIOCSTATUS failed"); | |
1569 | ||
1570 | /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are | |
1571 | already stopped, even if they all have PR_ASYNC set. */ | |
1572 | ||
1573 | if (!(pi->prstatus.pr_flags & PR_STOPPED)) | |
1574 | if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) | |
1575 | proc_init_failed (pi, "PIOCWSTOP failed"); | |
de43d7d0 SG |
1576 | |
1577 | if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0) | |
1578 | proc_init_failed (pi, "PIOCSFAULT failed"); | |
eca4a350 SG |
1579 | |
1580 | return pi; | |
de43d7d0 SG |
1581 | } |
1582 | ||
1583 | /* | |
1584 | ||
8fc2b417 SG |
1585 | LOCAL FUNCTION |
1586 | ||
1587 | procfs_exit_handler - handle entry into the _exit syscall | |
1588 | ||
1589 | SYNOPSIS | |
1590 | ||
1591 | int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
1592 | ||
1593 | DESCRIPTION | |
1594 | ||
1595 | This routine is called when an inferior process enters the _exit() | |
1596 | system call. It continues the process, and then collects the exit | |
1597 | status and pid which are returned in *statvalp and *rtnvalp. After | |
1598 | that it returns non-zero to indicate that procfs_wait should wake up. | |
1599 | ||
1600 | NOTES | |
1601 | There is probably a better way to do this. | |
1602 | ||
1603 | */ | |
1604 | ||
1605 | static int | |
1606 | procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
1607 | struct procinfo *pi; | |
1608 | int syscall_num; | |
1609 | int why; | |
1610 | int *rtnvalp; | |
1611 | int *statvalp; | |
1612 | { | |
1613 | pi->prrun.pr_flags = PRCFAULT; | |
1614 | ||
1615 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) | |
1616 | perror_with_name (pi->pathname); | |
1617 | ||
1618 | *rtnvalp = wait (statvalp); | |
1619 | if (*rtnvalp >= 0) | |
1620 | *rtnvalp = pi->pid; | |
1621 | ||
1622 | return 1; | |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | ||
1627 | LOCAL FUNCTION | |
1628 | ||
1629 | procfs_exec_handler - handle exit from the exec family of syscalls | |
1630 | ||
1631 | SYNOPSIS | |
1632 | ||
1633 | int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
1634 | ||
1635 | DESCRIPTION | |
1636 | ||
1637 | This routine is called when an inferior process is about to finish any | |
1638 | of the exec() family of system calls. It pretends that we got a | |
1639 | SIGTRAP (for compatibility with ptrace behavior), and returns non-zero | |
1640 | to tell procfs_wait to wake up. | |
1641 | ||
1642 | NOTES | |
1643 | This need for compatibility with ptrace is questionable. In the | |
1644 | future, it shouldn't be necessary. | |
1645 | ||
1646 | */ | |
1647 | ||
1648 | static int | |
1649 | procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
1650 | struct procinfo *pi; | |
1651 | int syscall_num; | |
1652 | int why; | |
1653 | int *rtnvalp; | |
1654 | int *statvalp; | |
1655 | { | |
1656 | *statvalp = (SIGTRAP << 8) | 0177; | |
1657 | ||
1658 | return 1; | |
1659 | } | |
1660 | ||
1661 | #ifdef SYS_sproc /* IRIX lwp creation system call */ | |
1662 | ||
1663 | /* | |
1664 | ||
1665 | LOCAL FUNCTION | |
1666 | ||
1667 | procfs_sproc_handler - handle exit from the sproc syscall | |
1668 | ||
1669 | SYNOPSIS | |
1670 | ||
1671 | int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
1672 | ||
1673 | DESCRIPTION | |
1674 | ||
1675 | This routine is called when an inferior process is about to finish an | |
1676 | sproc() system call. This is the system call that IRIX uses to create | |
1677 | a lightweight process. When the target process gets this event, we can | |
1678 | look at rval1 to find the new child processes ID, and create a new | |
1679 | procinfo struct from that. | |
1680 | ||
1681 | After that, it pretends that we got a SIGTRAP, and returns non-zero | |
1682 | to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets | |
1683 | woken up, sees the new process and continues it. | |
1684 | ||
1685 | NOTES | |
1686 | We actually never see the child exiting from sproc because we will | |
1687 | shortly stop the child with PIOCSTOP, which is then registered as the | |
1688 | event of interest. | |
1689 | */ | |
1690 | ||
1691 | static int | |
1692 | procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
1693 | struct procinfo *pi; | |
1694 | int syscall_num; | |
1695 | int why; | |
1696 | int *rtnvalp; | |
1697 | int *statvalp; | |
1698 | { | |
1699 | /* We've just detected the completion of an sproc system call. Now we need to | |
1700 | setup a procinfo struct for this thread, and notify the thread system of the | |
1701 | new arrival. */ | |
1702 | ||
1703 | /* If sproc failed, then nothing interesting happened. Continue the process | |
1704 | and go back to sleep. */ | |
1705 | ||
1706 | if (pi->prstatus.pr_errno != 0) | |
1707 | { | |
1708 | pi->prrun.pr_flags &= PRSTEP; | |
1709 | pi->prrun.pr_flags |= PRCFAULT; | |
1710 | ||
1711 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) | |
1712 | perror_with_name (pi->pathname); | |
1713 | ||
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | /* At this point, the new thread is stopped at it's first instruction, and | |
1718 | the parent is stopped at the exit from sproc. */ | |
1719 | ||
1720 | /* Notify the caller of the arrival of a new thread. */ | |
1721 | create_procinfo (pi->prstatus.pr_rval1); | |
1722 | ||
1723 | *rtnvalp = pi->prstatus.pr_rval1; | |
1724 | *statvalp = (SIGTRAP << 8) | 0177; | |
1725 | ||
1726 | return 1; | |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | ||
1731 | LOCAL FUNCTION | |
1732 | ||
1733 | procfs_fork_handler - handle exit from the fork syscall | |
1734 | ||
1735 | SYNOPSIS | |
1736 | ||
1737 | int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
1738 | ||
1739 | DESCRIPTION | |
1740 | ||
1741 | This routine is called when an inferior process is about to finish a | |
1742 | fork() system call. We will open up the new process, and then close | |
1743 | it, which releases it from the clutches of the debugger. | |
1744 | ||
1745 | After that, we continue the target process as though nothing had | |
1746 | happened. | |
1747 | ||
1748 | NOTES | |
1749 | This is necessary for IRIX because we have to set PR_FORK in order | |
1750 | to catch the creation of lwps (via sproc()). When an actual fork | |
1751 | occurs, it becomes necessary to reset the forks debugger flags and | |
1752 | continue it because we can't hack multiple processes yet. | |
1753 | */ | |
1754 | ||
1755 | static int | |
1756 | procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
1757 | struct procinfo *pi; | |
1758 | int syscall_num; | |
1759 | int why; | |
1760 | int *rtnvalp; | |
1761 | int *statvalp; | |
1762 | { | |
1763 | struct procinfo *pitemp; | |
1764 | ||
1765 | /* At this point, we've detected the completion of a fork (or vfork) call in | |
1766 | our child. The grandchild is also stopped because we set inherit-on-fork | |
1767 | earlier. (Note that nobody has the grandchilds' /proc file open at this | |
1768 | point.) We will release the grandchild from the debugger by opening it's | |
1769 | /proc file and then closing it. Since run-on-last-close is set, the | |
1770 | grandchild continues on its' merry way. */ | |
1771 | ||
1772 | ||
1773 | pitemp = create_procinfo (pi->prstatus.pr_rval1); | |
1774 | if (pitemp) | |
1775 | close_proc_file (pitemp); | |
1776 | ||
1777 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) | |
1778 | perror_with_name (pi->pathname); | |
1779 | ||
1780 | return 0; | |
1781 | } | |
1782 | #endif /* SYS_sproc */ | |
1783 | ||
1784 | /* | |
1785 | ||
de43d7d0 SG |
1786 | LOCAL FUNCTION |
1787 | ||
1788 | procfs_init_inferior - initialize target vector and access to a | |
1789 | /proc entry | |
35f5886e FF |
1790 | |
1791 | SYNOPSIS | |
1792 | ||
8fc2b417 | 1793 | int procfs_init_inferior (int pid) |
35f5886e FF |
1794 | |
1795 | DESCRIPTION | |
1796 | ||
1797 | When gdb starts an inferior, this function is called in the parent | |
1798 | process immediately after the fork. It waits for the child to stop | |
1799 | on the return from the exec system call (the child itself takes care | |
1800 | of ensuring that this is set up), then sets up the set of signals | |
8fc2b417 SG |
1801 | and faults that are to be traced. Returns the pid, which may have had |
1802 | the thread-id added to it. | |
35f5886e FF |
1803 | |
1804 | NOTES | |
1805 | ||
1806 | If proc_init_failed ever gets called, control returns to the command | |
1807 | processing loop via the standard error handling code. | |
cc221e76 | 1808 | |
35f5886e FF |
1809 | */ |
1810 | ||
8fc2b417 | 1811 | static int |
3fbdd536 | 1812 | procfs_init_inferior (pid) |
1ab3bf1b | 1813 | int pid; |
35f5886e | 1814 | { |
8fc2b417 SG |
1815 | struct procinfo *pip; |
1816 | ||
3fbdd536 JG |
1817 | push_target (&procfs_ops); |
1818 | ||
8fc2b417 SG |
1819 | pip = create_procinfo (pid); |
1820 | ||
1cb1b16c | 1821 | #ifndef PIOCSSPCACT |
8fc2b417 SG |
1822 | procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY, |
1823 | procfs_exit_handler); | |
1824 | ||
8fc2b417 SG |
1825 | #ifdef SYS_exec |
1826 | procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT, | |
1827 | procfs_exec_handler); | |
1828 | #endif | |
1829 | #ifdef SYS_execv | |
1830 | procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT, | |
1831 | procfs_exec_handler); | |
1832 | #endif | |
1833 | #ifdef SYS_execve | |
1834 | procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT, | |
1835 | procfs_exec_handler); | |
1836 | #endif | |
1cb1b16c | 1837 | #endif /* PIOCSSPCACT */ |
8fc2b417 SG |
1838 | |
1839 | /* Setup traps on exit from sproc() */ | |
1840 | ||
1841 | #ifdef SYS_sproc | |
1842 | procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT, | |
1843 | procfs_sproc_handler); | |
1844 | procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT, | |
1845 | procfs_fork_handler); | |
1846 | #ifdef SYS_vfork | |
1847 | procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT, | |
1848 | procfs_fork_handler); | |
1849 | #endif | |
1850 | /* Turn on inherit-on-fork flag so that all children of the target process | |
1851 | start with tracing flags set. This allows us to trap lwp creation. Note | |
1852 | that we also have to trap on fork and vfork in order to disable all tracing | |
1853 | in the targets child processes. */ | |
1854 | ||
1855 | modify_inherit_on_fork_flag (pip->fd, 1); | |
1856 | #endif | |
1857 | ||
1858 | #ifdef SYS_lwp_create | |
1859 | procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT, | |
1860 | procfs_lwp_creation_handler); | |
1861 | #endif | |
1862 | ||
1863 | /* create_procinfo may change the pid, so we have to update inferior_pid | |
1864 | here before calling other gdb routines that need the right pid. */ | |
1865 | ||
1866 | pid = pip -> pid; | |
1867 | inferior_pid = pid; | |
1868 | ||
1869 | add_thread (pip -> pid); /* Setup initial thread */ | |
bc28a06c | 1870 | |
2592eef8 PS |
1871 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
1872 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
1873 | #else | |
bc28a06c JK |
1874 | /* One trap to exec the shell, one to exec the program being debugged. */ |
1875 | startup_inferior (2); | |
2592eef8 | 1876 | #endif |
8fc2b417 SG |
1877 | |
1878 | return pid; | |
35f5886e FF |
1879 | } |
1880 | ||
1881 | /* | |
1882 | ||
cc221e76 FF |
1883 | GLOBAL FUNCTION |
1884 | ||
3950a34e | 1885 | procfs_notice_signals |
cc221e76 FF |
1886 | |
1887 | SYNOPSIS | |
1888 | ||
952a820e | 1889 | static void procfs_notice_signals (int pid); |
cc221e76 FF |
1890 | |
1891 | DESCRIPTION | |
1892 | ||
1893 | When the user changes the state of gdb's signal handling via the | |
1894 | "handle" command, this function gets called to see if any change | |
1895 | in the /proc interface is required. It is also called internally | |
1896 | by other /proc interface functions to initialize the state of | |
1897 | the traced signal set. | |
1898 | ||
1899 | One thing it does is that signals for which the state is "nostop", | |
1900 | "noprint", and "pass", have their trace bits reset in the pr_trace | |
1901 | field, so that they are no longer traced. This allows them to be | |
1902 | delivered directly to the inferior without the debugger ever being | |
1903 | involved. | |
1904 | */ | |
1905 | ||
3950a34e | 1906 | static void |
de43d7d0 | 1907 | procfs_notice_signals (pid) |
952a820e | 1908 | int pid; |
cc221e76 FF |
1909 | { |
1910 | int signo; | |
de43d7d0 | 1911 | struct procinfo *pi; |
cc221e76 | 1912 | |
de43d7d0 SG |
1913 | pi = find_procinfo (pid, 0); |
1914 | ||
1915 | for (signo = 0; signo < NSIG; signo++) | |
cc221e76 | 1916 | { |
67ac9759 JK |
1917 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && |
1918 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
1919 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
cc221e76 | 1920 | { |
de43d7d0 | 1921 | prdelset (&pi->prrun.pr_trace, signo); |
cc221e76 | 1922 | } |
de43d7d0 | 1923 | else |
cc221e76 | 1924 | { |
de43d7d0 | 1925 | praddset (&pi->prrun.pr_trace, signo); |
cc221e76 FF |
1926 | } |
1927 | } | |
de43d7d0 SG |
1928 | if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace)) |
1929 | { | |
1930 | print_sys_errmsg ("PIOCSTRACE failed", errno); | |
1931 | } | |
cc221e76 FF |
1932 | } |
1933 | ||
1934 | /* | |
1935 | ||
3fbdd536 | 1936 | LOCAL FUNCTION |
35f5886e FF |
1937 | |
1938 | proc_set_exec_trap -- arrange for exec'd child to halt at startup | |
1939 | ||
1940 | SYNOPSIS | |
1941 | ||
1942 | void proc_set_exec_trap (void) | |
1943 | ||
1944 | DESCRIPTION | |
1945 | ||
1946 | This function is called in the child process when starting up | |
1947 | an inferior, prior to doing the exec of the actual inferior. | |
1948 | It sets the child process's exitset to make exit from the exec | |
1949 | system call an event of interest to stop on, and then simply | |
1950 | returns. The child does the exec, the system call returns, and | |
1951 | the child stops at the first instruction, ready for the gdb | |
1952 | parent process to take control of it. | |
1953 | ||
1954 | NOTE | |
1955 | ||
1956 | We need to use all local variables since the child may be sharing | |
1957 | it's data space with the parent, if vfork was used rather than | |
1958 | fork. | |
cc221e76 FF |
1959 | |
1960 | Also note that we want to turn off the inherit-on-fork flag in | |
1961 | the child process so that any grand-children start with all | |
1962 | tracing flags cleared. | |
35f5886e FF |
1963 | */ |
1964 | ||
3fbdd536 | 1965 | static void |
1ab3bf1b | 1966 | proc_set_exec_trap () |
35f5886e FF |
1967 | { |
1968 | sysset_t exitset; | |
fb63d460 | 1969 | sysset_t entryset; |
35f5886e FF |
1970 | auto char procname[32]; |
1971 | int fd; | |
1972 | ||
4ed3a9ea | 1973 | sprintf (procname, PROC_NAME_FMT, getpid ()); |
35f5886e FF |
1974 | if ((fd = open (procname, O_RDWR)) < 0) |
1975 | { | |
1976 | perror (procname); | |
199b2450 | 1977 | gdb_flush (gdb_stderr); |
35f5886e FF |
1978 | _exit (127); |
1979 | } | |
1980 | premptyset (&exitset); | |
fb63d460 | 1981 | premptyset (&entryset); |
407a8389 | 1982 | |
2592eef8 PS |
1983 | #ifdef PIOCSSPCACT |
1984 | /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
1cb1b16c PS |
1985 | exits from exec system calls because of the user level loader. |
1986 | Starting with OSF/1-4.0, tracing the entry to the exit system | |
1987 | call no longer works. So we have to use PRFS_STOPTERM to trace | |
1988 | termination of the inferior. */ | |
2592eef8 PS |
1989 | { |
1990 | int prfs_flags; | |
1991 | ||
1992 | if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0) | |
1993 | { | |
1994 | perror (procname); | |
1995 | gdb_flush (gdb_stderr); | |
1996 | _exit (127); | |
1997 | } | |
1cb1b16c | 1998 | prfs_flags |= PRFS_STOPEXEC | PRFS_STOPTERM; |
2592eef8 PS |
1999 | if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0) |
2000 | { | |
2001 | perror (procname); | |
2002 | gdb_flush (gdb_stderr); | |
2003 | _exit (127); | |
2004 | } | |
2005 | } | |
1cb1b16c | 2006 | #else /* PIOCSSPCACT */ |
cc221e76 FF |
2007 | /* GW: Rationale... |
2008 | Not all systems with /proc have all the exec* syscalls with the same | |
2009 | names. On the SGI, for example, there is no SYS_exec, but there | |
2010 | *is* a SYS_execv. So, we try to account for that. */ | |
2011 | ||
407a8389 | 2012 | #ifdef SYS_exec |
35f5886e | 2013 | praddset (&exitset, SYS_exec); |
407a8389 SG |
2014 | #endif |
2015 | #ifdef SYS_execve | |
35f5886e | 2016 | praddset (&exitset, SYS_execve); |
407a8389 SG |
2017 | #endif |
2018 | #ifdef SYS_execv | |
fb63d460 | 2019 | praddset (&exitset, SYS_execv); |
407a8389 SG |
2020 | #endif |
2021 | ||
35f5886e FF |
2022 | if (ioctl (fd, PIOCSEXIT, &exitset) < 0) |
2023 | { | |
2024 | perror (procname); | |
199b2450 | 2025 | gdb_flush (gdb_stderr); |
35f5886e FF |
2026 | _exit (127); |
2027 | } | |
cc221e76 | 2028 | |
fb63d460 SG |
2029 | praddset (&entryset, SYS_exit); |
2030 | ||
2031 | if (ioctl (fd, PIOCSENTRY, &entryset) < 0) | |
2032 | { | |
2033 | perror (procname); | |
199b2450 | 2034 | gdb_flush (gdb_stderr); |
fb63d460 SG |
2035 | _exit (126); |
2036 | } | |
1cb1b16c | 2037 | #endif /* PIOCSSPCACT */ |
fb63d460 | 2038 | |
cc221e76 FF |
2039 | /* Turn off inherit-on-fork flag so that all grand-children of gdb |
2040 | start with tracing flags cleared. */ | |
2041 | ||
8fc2b417 | 2042 | modify_inherit_on_fork_flag (fd, 0); |
ec8ceca3 JG |
2043 | |
2044 | /* Turn on run-on-last-close flag so that this process will not hang | |
2045 | if GDB goes away for some reason. */ | |
2046 | ||
8fc2b417 SG |
2047 | modify_run_on_last_close_flag (fd, 1); |
2048 | ||
2049 | #ifdef PR_ASYNC | |
ec8ceca3 | 2050 | { |
8fc2b417 SG |
2051 | long pr_flags; |
2052 | ||
2053 | /* Solaris needs this to make procfs treat all threads seperately. Without | |
2054 | this, all threads halt whenever something happens to any thread. Since | |
2055 | GDB wants to control all this itself, it needs to set PR_ASYNC. */ | |
2056 | ||
2057 | pr_flags = PR_ASYNC; | |
2058 | ||
2059 | ioctl (fd, PIOCSET, &pr_flags); | |
ec8ceca3 | 2060 | } |
8fc2b417 | 2061 | #endif /* PR_ASYNC */ |
35f5886e FF |
2062 | } |
2063 | ||
f8b76e70 FF |
2064 | /* |
2065 | ||
a39ad5ce FF |
2066 | GLOBAL FUNCTION |
2067 | ||
2068 | proc_iterate_over_mappings -- call function for every mapped space | |
2069 | ||
2070 | SYNOPSIS | |
2071 | ||
2072 | int proc_iterate_over_mappings (int (*func)()) | |
2073 | ||
2074 | DESCRIPTION | |
2075 | ||
2076 | Given a pointer to a function, call that function for every | |
2077 | mapped address space, passing it an open file descriptor for | |
2078 | the file corresponding to that mapped address space (if any) | |
2079 | and the base address of the mapped space. Quit when we hit | |
2080 | the end of the mappings or the function returns nonzero. | |
2081 | */ | |
2082 | ||
2083 | int | |
1ab3bf1b JG |
2084 | proc_iterate_over_mappings (func) |
2085 | int (*func) PARAMS ((int, CORE_ADDR)); | |
a39ad5ce FF |
2086 | { |
2087 | int nmap; | |
2088 | int fd; | |
2089 | int funcstat = 0; | |
2090 | struct prmap *prmaps; | |
2091 | struct prmap *prmap; | |
de43d7d0 SG |
2092 | struct procinfo *pi; |
2093 | ||
2094 | pi = current_procinfo; | |
a39ad5ce | 2095 | |
de43d7d0 | 2096 | if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0) |
a39ad5ce | 2097 | { |
1ab3bf1b | 2098 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
de43d7d0 | 2099 | if (ioctl (pi->fd, PIOCMAP, prmaps) == 0) |
a39ad5ce FF |
2100 | { |
2101 | for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap) | |
2102 | { | |
de43d7d0 | 2103 | fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0); |
1ab3bf1b | 2104 | funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr); |
a39ad5ce FF |
2105 | close (fd); |
2106 | } | |
2107 | } | |
2108 | } | |
2109 | return (funcstat); | |
2110 | } | |
2111 | ||
3fbdd536 | 2112 | #if 0 /* Currently unused */ |
a39ad5ce FF |
2113 | /* |
2114 | ||
f8b76e70 FF |
2115 | GLOBAL FUNCTION |
2116 | ||
2117 | proc_base_address -- find base address for segment containing address | |
2118 | ||
2119 | SYNOPSIS | |
2120 | ||
2121 | CORE_ADDR proc_base_address (CORE_ADDR addr) | |
2122 | ||
2123 | DESCRIPTION | |
2124 | ||
2125 | Given an address of a location in the inferior, find and return | |
2126 | the base address of the mapped segment containing that address. | |
2127 | ||
2128 | This is used for example, by the shared library support code, | |
2129 | where we have the pc value for some location in the shared library | |
2130 | where we are stopped, and need to know the base address of the | |
2131 | segment containing that address. | |
2132 | */ | |
2133 | ||
f8b76e70 | 2134 | CORE_ADDR |
1ab3bf1b | 2135 | proc_base_address (addr) |
cc221e76 | 2136 | CORE_ADDR addr; |
f8b76e70 FF |
2137 | { |
2138 | int nmap; | |
2139 | struct prmap *prmaps; | |
2140 | struct prmap *prmap; | |
2141 | CORE_ADDR baseaddr = 0; | |
de43d7d0 | 2142 | struct procinfo *pi; |
f8b76e70 | 2143 | |
de43d7d0 SG |
2144 | pi = current_procinfo; |
2145 | ||
2146 | if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0) | |
f8b76e70 | 2147 | { |
1ab3bf1b | 2148 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
de43d7d0 | 2149 | if (ioctl (pi->fd, PIOCMAP, prmaps) == 0) |
f8b76e70 FF |
2150 | { |
2151 | for (prmap = prmaps; prmap -> pr_size; ++prmap) | |
2152 | { | |
2153 | if ((prmap -> pr_vaddr <= (caddr_t) addr) && | |
2154 | (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr)) | |
2155 | { | |
2156 | baseaddr = (CORE_ADDR) prmap -> pr_vaddr; | |
2157 | break; | |
2158 | } | |
2159 | } | |
2160 | } | |
2161 | } | |
2162 | return (baseaddr); | |
2163 | } | |
2164 | ||
1ab3bf1b JG |
2165 | #endif /* 0 */ |
2166 | ||
f8b76e70 FF |
2167 | /* |
2168 | ||
cc221e76 | 2169 | LOCAL FUNCTION |
f8b76e70 FF |
2170 | |
2171 | proc_address_to_fd -- return open fd for file mapped to address | |
2172 | ||
2173 | SYNOPSIS | |
2174 | ||
de43d7d0 | 2175 | int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain) |
f8b76e70 FF |
2176 | |
2177 | DESCRIPTION | |
2178 | ||
2179 | Given an address in the current inferior's address space, use the | |
2180 | /proc interface to find an open file descriptor for the file that | |
2181 | this address was mapped in from. Return -1 if there is no current | |
2182 | inferior. Print a warning message if there is an inferior but | |
2183 | the address corresponds to no file (IE a bogus address). | |
2184 | ||
2185 | */ | |
2186 | ||
1ab3bf1b | 2187 | static int |
de43d7d0 SG |
2188 | proc_address_to_fd (pi, addr, complain) |
2189 | struct procinfo *pi; | |
1ab3bf1b JG |
2190 | CORE_ADDR addr; |
2191 | int complain; | |
f8b76e70 FF |
2192 | { |
2193 | int fd = -1; | |
2194 | ||
de43d7d0 | 2195 | if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0) |
f8b76e70 | 2196 | { |
de43d7d0 | 2197 | if (complain) |
f8b76e70 | 2198 | { |
de43d7d0 SG |
2199 | print_sys_errmsg (pi->pathname, errno); |
2200 | warning ("can't find mapped file for address 0x%x", addr); | |
f8b76e70 FF |
2201 | } |
2202 | } | |
2203 | return (fd); | |
2204 | } | |
2205 | ||
35f5886e | 2206 | |
3fbdd536 JG |
2207 | /* Attach to process PID, then initialize for debugging it |
2208 | and wait for the trace-trap that results from attaching. */ | |
2209 | ||
2210 | static void | |
2211 | procfs_attach (args, from_tty) | |
2212 | char *args; | |
2213 | int from_tty; | |
2214 | { | |
2215 | char *exec_file; | |
2216 | int pid; | |
2217 | ||
2218 | if (!args) | |
2219 | error_no_arg ("process-id to attach"); | |
2220 | ||
2221 | pid = atoi (args); | |
2222 | ||
2223 | if (pid == getpid()) /* Trying to masturbate? */ | |
2224 | error ("I refuse to debug myself!"); | |
2225 | ||
2226 | if (from_tty) | |
2227 | { | |
2228 | exec_file = (char *) get_exec_file (0); | |
2229 | ||
2230 | if (exec_file) | |
199b2450 | 2231 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid)); |
3fbdd536 | 2232 | else |
199b2450 | 2233 | printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid)); |
3fbdd536 | 2234 | |
199b2450 | 2235 | gdb_flush (gdb_stdout); |
3fbdd536 JG |
2236 | } |
2237 | ||
8fc2b417 | 2238 | inferior_pid = pid = do_attach (pid); |
3fbdd536 JG |
2239 | push_target (&procfs_ops); |
2240 | } | |
2241 | ||
2242 | ||
2243 | /* Take a program previously attached to and detaches it. | |
2244 | The program resumes execution and will no longer stop | |
2245 | on signals, etc. We'd better not have left any breakpoints | |
2246 | in the program or it'll die when it hits one. For this | |
2247 | to work, it may be necessary for the process to have been | |
2248 | previously attached. It *might* work if the program was | |
2249 | started via the normal ptrace (PTRACE_TRACEME). */ | |
2250 | ||
2251 | static void | |
2252 | procfs_detach (args, from_tty) | |
2253 | char *args; | |
2254 | int from_tty; | |
2255 | { | |
2256 | int siggnal = 0; | |
2257 | ||
2258 | if (from_tty) | |
2259 | { | |
2260 | char *exec_file = get_exec_file (0); | |
2261 | if (exec_file == 0) | |
2262 | exec_file = ""; | |
199b2450 | 2263 | printf_unfiltered ("Detaching from program: %s %s\n", |
25286543 | 2264 | exec_file, target_pid_to_str (inferior_pid)); |
199b2450 | 2265 | gdb_flush (gdb_stdout); |
3fbdd536 JG |
2266 | } |
2267 | if (args) | |
2268 | siggnal = atoi (args); | |
2269 | ||
2270 | do_detach (siggnal); | |
2271 | inferior_pid = 0; | |
2272 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ | |
2273 | } | |
2274 | ||
2275 | /* Get ready to modify the registers array. On machines which store | |
2276 | individual registers, this doesn't need to do anything. On machines | |
2277 | which store all the registers in one fell swoop, this makes sure | |
2278 | that registers contains all the registers from the program being | |
2279 | debugged. */ | |
2280 | ||
2281 | static void | |
2282 | procfs_prepare_to_store () | |
2283 | { | |
2284 | #ifdef CHILD_PREPARE_TO_STORE | |
2285 | CHILD_PREPARE_TO_STORE (); | |
2286 | #endif | |
2287 | } | |
2288 | ||
2289 | /* Print status information about what we're accessing. */ | |
2290 | ||
2291 | static void | |
2292 | procfs_files_info (ignore) | |
2293 | struct target_ops *ignore; | |
2294 | { | |
199b2450 | 2295 | printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n", |
25286543 | 2296 | attach_flag? "attached": "child", target_pid_to_str (inferior_pid)); |
3fbdd536 JG |
2297 | } |
2298 | ||
2299 | /* ARGSUSED */ | |
2300 | static void | |
2301 | procfs_open (arg, from_tty) | |
2302 | char *arg; | |
2303 | int from_tty; | |
2304 | { | |
2305 | error ("Use the \"run\" command to start a Unix child process."); | |
2306 | } | |
35f5886e FF |
2307 | |
2308 | /* | |
2309 | ||
3fbdd536 | 2310 | LOCAL FUNCTION |
35f5886e | 2311 | |
3fbdd536 | 2312 | do_attach -- attach to an already existing process |
35f5886e FF |
2313 | |
2314 | SYNOPSIS | |
2315 | ||
3fbdd536 | 2316 | int do_attach (int pid) |
35f5886e FF |
2317 | |
2318 | DESCRIPTION | |
2319 | ||
2320 | Attach to an already existing process with the specified process | |
2321 | id. If the process is not already stopped, query whether to | |
2322 | stop it or not. | |
2323 | ||
2324 | NOTES | |
2325 | ||
2326 | The option of stopping at attach time is specific to the /proc | |
2327 | versions of gdb. Versions using ptrace force the attachee | |
ec8ceca3 JG |
2328 | to stop. (I have changed this version to do so, too. All you |
2329 | have to do is "continue" to make it go on. -- gnu@cygnus.com) | |
35f5886e FF |
2330 | |
2331 | */ | |
2332 | ||
3fbdd536 JG |
2333 | static int |
2334 | do_attach (pid) | |
1ab3bf1b | 2335 | int pid; |
35f5886e | 2336 | { |
de43d7d0 SG |
2337 | struct procinfo *pi; |
2338 | ||
2339 | pi = (struct procinfo *) xmalloc (sizeof (struct procinfo)); | |
ec8ceca3 | 2340 | |
de43d7d0 | 2341 | if (!open_proc_file (pid, pi, O_RDWR)) |
35f5886e | 2342 | { |
de43d7d0 SG |
2343 | free (pi); |
2344 | perror_with_name (pi->pathname); | |
35f5886e FF |
2345 | /* NOTREACHED */ |
2346 | } | |
2347 | ||
8fc2b417 SG |
2348 | pid = pi -> pid; |
2349 | ||
de43d7d0 SG |
2350 | /* Add new process to process info list */ |
2351 | ||
2352 | pi->next = procinfo_list; | |
2353 | procinfo_list = pi; | |
2354 | ||
2355 | add_fd (pi); /* Add to list for poll/select */ | |
2356 | ||
35f5886e FF |
2357 | /* Get current status of process and if it is not already stopped, |
2358 | then stop it. Remember whether or not it was stopped when we first | |
2359 | examined it. */ | |
2360 | ||
de43d7d0 | 2361 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
35f5886e | 2362 | { |
de43d7d0 SG |
2363 | print_sys_errmsg (pi->pathname, errno); |
2364 | close_proc_file (pi); | |
35f5886e FF |
2365 | error ("PIOCSTATUS failed"); |
2366 | } | |
de43d7d0 | 2367 | if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
35f5886e | 2368 | { |
de43d7d0 | 2369 | pi->was_stopped = 1; |
35f5886e FF |
2370 | } |
2371 | else | |
2372 | { | |
de43d7d0 | 2373 | pi->was_stopped = 0; |
ec8ceca3 | 2374 | if (1 || query ("Process is currently running, stop it? ")) |
35f5886e | 2375 | { |
ec8ceca3 | 2376 | /* Make it run again when we close it. */ |
8fc2b417 SG |
2377 | |
2378 | modify_run_on_last_close_flag (pi->fd, 1); | |
2379 | ||
de43d7d0 | 2380 | if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0) |
35f5886e | 2381 | { |
de43d7d0 SG |
2382 | print_sys_errmsg (pi->pathname, errno); |
2383 | close_proc_file (pi); | |
35f5886e FF |
2384 | error ("PIOCSTOP failed"); |
2385 | } | |
de43d7d0 | 2386 | pi->nopass_next_sigstop = 1; |
d65eee73 FF |
2387 | } |
2388 | else | |
2389 | { | |
199b2450 | 2390 | printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid)); |
35f5886e FF |
2391 | } |
2392 | } | |
ec8ceca3 | 2393 | |
35f5886e FF |
2394 | /* Remember some things about the inferior that we will, or might, change |
2395 | so that we can restore them when we detach. */ | |
2396 | ||
de43d7d0 SG |
2397 | ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace); |
2398 | ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold); | |
2399 | ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset); | |
2400 | ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset); | |
2401 | ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset); | |
35f5886e FF |
2402 | |
2403 | /* Set up trace and fault sets, as gdb expects them. */ | |
2404 | ||
de43d7d0 SG |
2405 | memset (&pi->prrun, 0, sizeof (pi->prrun)); |
2406 | prfillset (&pi->prrun.pr_trace); | |
2407 | procfs_notice_signals (pid); | |
2408 | prfillset (&pi->prrun.pr_fault); | |
2409 | prdelset (&pi->prrun.pr_fault, FLTPAGE); | |
2592eef8 | 2410 | |
b9e58503 PS |
2411 | #ifdef PROCFS_DONT_TRACE_FAULTS |
2412 | premptyset (&pi->prrun.pr_fault); | |
2592eef8 PS |
2413 | #endif |
2414 | ||
de43d7d0 | 2415 | if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault)) |
35f5886e | 2416 | { |
f66f459f | 2417 | print_sys_errmsg ("PIOCSFAULT failed", errno); |
35f5886e | 2418 | } |
de43d7d0 | 2419 | if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace)) |
35f5886e | 2420 | { |
f66f459f | 2421 | print_sys_errmsg ("PIOCSTRACE failed", errno); |
35f5886e FF |
2422 | } |
2423 | attach_flag = 1; | |
2424 | return (pid); | |
2425 | } | |
2426 | ||
2427 | /* | |
2428 | ||
3fbdd536 | 2429 | LOCAL FUNCTION |
35f5886e | 2430 | |
3fbdd536 | 2431 | do_detach -- detach from an attached-to process |
35f5886e FF |
2432 | |
2433 | SYNOPSIS | |
2434 | ||
3fbdd536 | 2435 | void do_detach (int signal) |
35f5886e FF |
2436 | |
2437 | DESCRIPTION | |
2438 | ||
2439 | Detach from the current attachee. | |
2440 | ||
2441 | If signal is non-zero, the attachee is started running again and sent | |
2442 | the specified signal. | |
2443 | ||
2444 | If signal is zero and the attachee was not already stopped when we | |
2445 | attached to it, then we make it runnable again when we detach. | |
2446 | ||
2447 | Otherwise, we query whether or not to make the attachee runnable | |
2448 | again, since we may simply want to leave it in the state it was in | |
2449 | when we attached. | |
2450 | ||
2451 | We report any problems, but do not consider them errors, since we | |
2452 | MUST detach even if some things don't seem to go right. This may not | |
2453 | be the ideal situation. (FIXME). | |
2454 | */ | |
2455 | ||
3fbdd536 JG |
2456 | static void |
2457 | do_detach (signal) | |
1ab3bf1b | 2458 | int signal; |
35f5886e | 2459 | { |
de43d7d0 SG |
2460 | struct procinfo *pi; |
2461 | ||
2462 | pi = current_procinfo; | |
ec8ceca3 | 2463 | |
35f5886e FF |
2464 | if (signal) |
2465 | { | |
de43d7d0 | 2466 | set_proc_siginfo (pi, signal); |
35f5886e | 2467 | } |
de43d7d0 | 2468 | if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0) |
35f5886e | 2469 | { |
de43d7d0 | 2470 | print_sys_errmsg (pi->pathname, errno); |
199b2450 | 2471 | printf_unfiltered ("PIOCSEXIT failed.\n"); |
35f5886e | 2472 | } |
de43d7d0 | 2473 | if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0) |
35f5886e | 2474 | { |
de43d7d0 | 2475 | print_sys_errmsg (pi->pathname, errno); |
199b2450 | 2476 | printf_unfiltered ("PIOCSENTRY failed.\n"); |
35f5886e | 2477 | } |
de43d7d0 | 2478 | if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0) |
35f5886e | 2479 | { |
de43d7d0 | 2480 | print_sys_errmsg (pi->pathname, errno); |
199b2450 | 2481 | printf_unfiltered ("PIOCSTRACE failed.\n"); |
35f5886e | 2482 | } |
de43d7d0 | 2483 | if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0) |
cc221e76 | 2484 | { |
de43d7d0 | 2485 | print_sys_errmsg (pi->pathname, errno); |
199b2450 | 2486 | printf_unfiltered ("PIOSCHOLD failed.\n"); |
cc221e76 | 2487 | } |
de43d7d0 | 2488 | if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0) |
35f5886e | 2489 | { |
de43d7d0 | 2490 | print_sys_errmsg (pi->pathname, errno); |
199b2450 | 2491 | printf_unfiltered ("PIOCSFAULT failed.\n"); |
35f5886e | 2492 | } |
de43d7d0 | 2493 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
35f5886e | 2494 | { |
de43d7d0 | 2495 | print_sys_errmsg (pi->pathname, errno); |
199b2450 | 2496 | printf_unfiltered ("PIOCSTATUS failed.\n"); |
35f5886e FF |
2497 | } |
2498 | else | |
2499 | { | |
de43d7d0 | 2500 | if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))) |
35f5886e | 2501 | { |
de43d7d0 | 2502 | if (signal || !pi->was_stopped || |
35f5886e FF |
2503 | query ("Was stopped when attached, make it runnable again? ")) |
2504 | { | |
2592eef8 PS |
2505 | /* Clear any pending signal if we want to detach without |
2506 | a signal. */ | |
2507 | if (signal == 0) | |
2508 | set_proc_siginfo (pi, signal); | |
2509 | ||
ec8ceca3 | 2510 | /* Clear any fault that might have stopped it. */ |
de43d7d0 | 2511 | if (ioctl (pi->fd, PIOCCFAULT, 0)) |
eca4a350 SG |
2512 | { |
2513 | print_sys_errmsg (pi->pathname, errno); | |
199b2450 | 2514 | printf_unfiltered ("PIOCCFAULT failed.\n"); |
eca4a350 | 2515 | } |
ec8ceca3 JG |
2516 | |
2517 | /* Make it run again when we close it. */ | |
8fc2b417 SG |
2518 | |
2519 | modify_run_on_last_close_flag (pi->fd, 1); | |
35f5886e FF |
2520 | } |
2521 | } | |
2522 | } | |
de43d7d0 | 2523 | close_proc_file (pi); |
35f5886e FF |
2524 | attach_flag = 0; |
2525 | } | |
2526 | ||
45dc9be3 JK |
2527 | /* emulate wait() as much as possible. |
2528 | Wait for child to do something. Return pid of child, or -1 in case | |
2529 | of error; store status in *OURSTATUS. | |
2530 | ||
2531 | Not sure why we can't | |
2532 | just use wait(), but it seems to have problems when applied to a | |
2533 | process being controlled with the /proc interface. | |
2534 | ||
2535 | We have a race problem here with no obvious solution. We need to let | |
2536 | the inferior run until it stops on an event of interest, which means | |
2537 | that we need to use the PIOCWSTOP ioctl. However, we cannot use this | |
2538 | ioctl if the process is already stopped on something that is not an | |
2539 | event of interest, or the call will hang indefinitely. Thus we first | |
2540 | use PIOCSTATUS to see if the process is not stopped. If not, then we | |
2541 | use PIOCWSTOP. But during the window between the two, if the process | |
2542 | stops for any reason that is not an event of interest (such as a job | |
2543 | control signal) then gdb will hang. One possible workaround is to set | |
2544 | an alarm to wake up every minute of so and check to see if the process | |
2545 | is still running, and if so, then reissue the PIOCWSTOP. But this is | |
2546 | a real kludge, so has not been implemented. FIXME: investigate | |
2547 | alternatives. | |
2548 | ||
2549 | FIXME: Investigate why wait() seems to have problems with programs | |
2550 | being control by /proc routines. */ | |
35f5886e | 2551 | |
3fbdd536 | 2552 | static int |
45dc9be3 | 2553 | procfs_wait (pid, ourstatus) |
de43d7d0 | 2554 | int pid; |
67ac9759 | 2555 | struct target_waitstatus *ourstatus; |
35f5886e FF |
2556 | { |
2557 | short what; | |
2558 | short why; | |
2559 | int statval = 0; | |
2560 | int checkerr = 0; | |
2561 | int rtnval = -1; | |
de43d7d0 SG |
2562 | struct procinfo *pi; |
2563 | ||
2564 | if (pid != -1) /* Non-specific process? */ | |
2565 | pi = NULL; | |
2566 | else | |
2567 | for (pi = procinfo_list; pi; pi = pi->next) | |
2568 | if (pi->had_event) | |
2569 | break; | |
2570 | ||
de43d7d0 | 2571 | if (!pi) |
eca4a350 SG |
2572 | { |
2573 | wait_again: | |
2574 | ||
8fc2b417 SG |
2575 | if (pi) |
2576 | pi->had_event = 0; | |
2577 | ||
eca4a350 SG |
2578 | pi = wait_fd (); |
2579 | } | |
de43d7d0 SG |
2580 | |
2581 | if (pid != -1) | |
2582 | for (pi = procinfo_list; pi; pi = pi->next) | |
2583 | if (pi->pid == pid && pi->had_event) | |
2584 | break; | |
2585 | ||
2586 | if (!pi && !checkerr) | |
2587 | goto wait_again; | |
2588 | ||
2589 | if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))) | |
2590 | { | |
2591 | if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) | |
2592 | { | |
2593 | checkerr++; | |
2594 | } | |
35f5886e FF |
2595 | } |
2596 | if (checkerr) | |
2597 | { | |
2598 | if (errno == ENOENT) | |
2599 | { | |
2600 | rtnval = wait (&statval); | |
2601 | if (rtnval != inferior_pid) | |
2602 | { | |
de43d7d0 | 2603 | print_sys_errmsg (pi->pathname, errno); |
35f5886e FF |
2604 | error ("PIOCWSTOP, wait failed, returned %d", rtnval); |
2605 | /* NOTREACHED */ | |
2606 | } | |
2607 | } | |
2608 | else | |
2609 | { | |
de43d7d0 | 2610 | print_sys_errmsg (pi->pathname, errno); |
35f5886e FF |
2611 | error ("PIOCSTATUS or PIOCWSTOP failed."); |
2612 | /* NOTREACHED */ | |
2613 | } | |
2614 | } | |
de43d7d0 | 2615 | else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
35f5886e | 2616 | { |
8fc2b417 | 2617 | rtnval = pi->pid; |
de43d7d0 SG |
2618 | why = pi->prstatus.pr_why; |
2619 | what = pi->prstatus.pr_what; | |
2620 | ||
2621 | switch (why) | |
35f5886e | 2622 | { |
de43d7d0 | 2623 | case PR_SIGNALLED: |
35f5886e | 2624 | statval = (what << 8) | 0177; |
fb63d460 SG |
2625 | break; |
2626 | case PR_SYSENTRY: | |
de43d7d0 | 2627 | case PR_SYSEXIT: |
8fc2b417 SG |
2628 | { |
2629 | int i; | |
2630 | int found_handler = 0; | |
de43d7d0 | 2631 | |
8fc2b417 SG |
2632 | for (i = 0; i < pi->num_syscall_handlers; i++) |
2633 | if (pi->syscall_handlers[i].syscall_num == what) | |
de43d7d0 | 2634 | { |
8fc2b417 SG |
2635 | found_handler = 1; |
2636 | if (!pi->syscall_handlers[i].func (pi, what, why, | |
2637 | &rtnval, &statval)) | |
2638 | goto wait_again; | |
de43d7d0 | 2639 | |
8fc2b417 | 2640 | break; |
de43d7d0 SG |
2641 | } |
2642 | ||
8fc2b417 SG |
2643 | if (!found_handler) |
2644 | if (why == PR_SYSENTRY) | |
2645 | error ("PR_SYSENTRY, unhandled system call %d", what); | |
2646 | else | |
2647 | error ("PR_SYSEXIT, unhandled system call %d", what); | |
2648 | } | |
de43d7d0 | 2649 | break; |
1cb1b16c PS |
2650 | #ifdef PR_DEAD |
2651 | case (short)PR_DEAD: | |
2652 | { | |
2653 | int dummy; | |
2654 | ||
2655 | /* The inferior process is about to terminate. | |
2656 | pr_what has the process's exit or return value. | |
2657 | A PIOCRUN ioctl must be used to restart the process so it | |
2658 | can finish exiting. */ | |
2659 | ||
2660 | pi->prrun.pr_flags = PRCFAULT; | |
2661 | ||
2662 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) | |
2663 | perror_with_name (pi->pathname); | |
2664 | ||
2665 | if (wait (&dummy) < 0) | |
2666 | rtnval = -1; | |
2667 | statval = pi->prstatus.pr_what; | |
2668 | } | |
2669 | break; | |
2670 | #endif | |
de43d7d0 | 2671 | case PR_REQUESTED: |
35f5886e | 2672 | statval = (SIGSTOP << 8) | 0177; |
de43d7d0 SG |
2673 | break; |
2674 | case PR_JOBCONTROL: | |
35f5886e | 2675 | statval = (what << 8) | 0177; |
de43d7d0 SG |
2676 | break; |
2677 | case PR_FAULTED: | |
35f5886e FF |
2678 | switch (what) |
2679 | { | |
e6b8a171 | 2680 | #ifdef FLTWATCH |
999dd04b | 2681 | case FLTWATCH: |
e6b8a171 JL |
2682 | statval = (SIGTRAP << 8) | 0177; |
2683 | break; | |
2684 | #endif | |
2685 | #ifdef FLTKWATCH | |
999dd04b | 2686 | case FLTKWATCH: |
35f5886e FF |
2687 | statval = (SIGTRAP << 8) | 0177; |
2688 | break; | |
e6b8a171 | 2689 | #endif |
3f5e2fb5 JK |
2690 | #ifndef FAULTED_USE_SIGINFO |
2691 | /* Irix, contrary to the documentation, fills in 0 for si_signo. | |
2692 | Solaris fills in si_signo. I'm not sure about others. */ | |
2693 | case FLTPRIV: | |
2694 | case FLTILL: | |
2695 | statval = (SIGILL << 8) | 0177; | |
2696 | break; | |
2697 | case FLTBPT: | |
2698 | case FLTTRACE: | |
2699 | statval = (SIGTRAP << 8) | 0177; | |
2700 | break; | |
2701 | case FLTSTACK: | |
2702 | case FLTACCESS: | |
2703 | case FLTBOUNDS: | |
2704 | statval = (SIGSEGV << 8) | 0177; | |
2705 | break; | |
2706 | case FLTIOVF: | |
2707 | case FLTIZDIV: | |
2708 | case FLTFPE: | |
2709 | statval = (SIGFPE << 8) | 0177; | |
2710 | break; | |
2711 | case FLTPAGE: /* Recoverable page fault */ | |
2712 | #endif /* not FAULTED_USE_SIGINFO */ | |
35f5886e | 2713 | default: |
890634ed JK |
2714 | /* Use the signal which the kernel assigns. This is better than |
2715 | trying to second-guess it from the fault. In fact, I suspect | |
2716 | that FLTACCESS can be either SIGSEGV or SIGBUS. */ | |
2717 | statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177; | |
2718 | break; | |
35f5886e | 2719 | } |
de43d7d0 SG |
2720 | break; |
2721 | default: | |
35f5886e | 2722 | error ("PIOCWSTOP, unknown why %d, what %d", why, what); |
35f5886e | 2723 | } |
de43d7d0 SG |
2724 | /* Stop all the other threads when any of them stops. */ |
2725 | ||
2726 | { | |
2727 | struct procinfo *procinfo; | |
2728 | ||
2729 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) | |
2730 | { | |
2731 | if (!procinfo->had_event) | |
8fc2b417 SG |
2732 | { |
2733 | /* A bug in Solaris (2.5) causes us to hang when trying to | |
2734 | stop a stopped process. So, we have to check first in | |
2735 | order to avoid the hang. */ | |
2736 | if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0) | |
2737 | { | |
2738 | print_sys_errmsg (procinfo->pathname, errno); | |
2739 | error ("PIOCSTATUS failed"); | |
2740 | } | |
2741 | if (!(procinfo->prstatus.pr_flags & PR_STOPPED)) | |
2742 | if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0) | |
2743 | { | |
2744 | print_sys_errmsg (procinfo->pathname, errno); | |
2745 | error ("PIOCSTOP failed"); | |
2746 | } | |
2747 | } | |
de43d7d0 SG |
2748 | } |
2749 | } | |
35f5886e FF |
2750 | } |
2751 | else | |
2752 | { | |
2753 | error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x", | |
de43d7d0 | 2754 | pi->prstatus.pr_flags); |
35f5886e | 2755 | } |
3fbdd536 | 2756 | |
67ac9759 | 2757 | store_waitstatus (ourstatus, statval); |
3fbdd536 JG |
2758 | |
2759 | if (rtnval == -1) /* No more children to wait for */ | |
2760 | { | |
199b2450 | 2761 | fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n"); |
67ac9759 JK |
2762 | /* Claim it exited with unknown signal. */ |
2763 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
2764 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
3fbdd536 JG |
2765 | return rtnval; |
2766 | } | |
2767 | ||
de43d7d0 | 2768 | pi->had_event = 0; /* Indicate that we've seen this one */ |
35f5886e FF |
2769 | return (rtnval); |
2770 | } | |
2771 | ||
2772 | /* | |
2773 | ||
6b801388 FF |
2774 | LOCAL FUNCTION |
2775 | ||
2776 | set_proc_siginfo - set a process's current signal info | |
2777 | ||
2778 | SYNOPSIS | |
2779 | ||
2780 | void set_proc_siginfo (struct procinfo *pip, int signo); | |
2781 | ||
2782 | DESCRIPTION | |
2783 | ||
2784 | Given a pointer to a process info struct in PIP and a signal number | |
2785 | in SIGNO, set the process's current signal and its associated signal | |
2786 | information. The signal will be delivered to the process immediately | |
2787 | after execution is resumed, even if it is being held. In addition, | |
2788 | this particular delivery will not cause another PR_SIGNALLED stop | |
2789 | even if the signal is being traced. | |
2790 | ||
2791 | If we are not delivering the same signal that the prstatus siginfo | |
2792 | struct contains information about, then synthesize a siginfo struct | |
2793 | to match the signal we are doing to deliver, make it of the type | |
2794 | "generated by a user process", and send this synthesized copy. When | |
2795 | used to set the inferior's signal state, this will be required if we | |
2796 | are not currently stopped because of a traced signal, or if we decide | |
2797 | to continue with a different signal. | |
2798 | ||
2799 | Note that when continuing the inferior from a stop due to receipt | |
2800 | of a traced signal, we either have set PRCSIG to clear the existing | |
2801 | signal, or we have to call this function to do a PIOCSSIG with either | |
2802 | the existing siginfo struct from pr_info, or one we have synthesized | |
2803 | appropriately for the signal we want to deliver. Otherwise if the | |
2804 | signal is still being traced, the inferior will immediately stop | |
2805 | again. | |
2806 | ||
2807 | See siginfo(5) for more details. | |
2808 | */ | |
2809 | ||
2810 | static void | |
2811 | set_proc_siginfo (pip, signo) | |
cc221e76 FF |
2812 | struct procinfo *pip; |
2813 | int signo; | |
6b801388 FF |
2814 | { |
2815 | struct siginfo newsiginfo; | |
2816 | struct siginfo *sip; | |
2817 | ||
2592eef8 PS |
2818 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
2819 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
a1a0d974 | 2820 | receives a PIOCSSIG with a signal identical to the current signal, |
2592eef8 PS |
2821 | it messes up the current signal. Work around the kernel bug. */ |
2822 | if (signo == pip -> prstatus.pr_cursig) | |
2823 | return; | |
2824 | #endif | |
2825 | ||
de43d7d0 | 2826 | if (signo == pip -> prstatus.pr_info.si_signo) |
6b801388 | 2827 | { |
de43d7d0 SG |
2828 | sip = &pip -> prstatus.pr_info; |
2829 | } | |
2830 | else | |
2831 | { | |
2832 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); | |
2833 | sip = &newsiginfo; | |
2834 | sip -> si_signo = signo; | |
2835 | sip -> si_code = 0; | |
2836 | sip -> si_errno = 0; | |
2837 | sip -> si_pid = getpid (); | |
2838 | sip -> si_uid = getuid (); | |
2839 | } | |
2840 | if (ioctl (pip -> fd, PIOCSSIG, sip) < 0) | |
2841 | { | |
2842 | print_sys_errmsg (pip -> pathname, errno); | |
2843 | warning ("PIOCSSIG failed"); | |
6b801388 FF |
2844 | } |
2845 | } | |
2846 | ||
25286543 | 2847 | /* Resume execution of process PID. If STEP is nozero, then |
59ba57da JK |
2848 | just single step it. If SIGNAL is nonzero, restart it with that |
2849 | signal activated. */ | |
35f5886e | 2850 | |
3fbdd536 | 2851 | static void |
25286543 SG |
2852 | procfs_resume (pid, step, signo) |
2853 | int pid; | |
1ab3bf1b | 2854 | int step; |
67ac9759 | 2855 | enum target_signal signo; |
35f5886e | 2856 | { |
59ba57da | 2857 | int signal_to_pass; |
de43d7d0 SG |
2858 | struct procinfo *pi, *procinfo; |
2859 | ||
2860 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); | |
59ba57da | 2861 | |
35f5886e | 2862 | errno = 0; |
de43d7d0 | 2863 | pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT; |
99fd9e3e | 2864 | |
59ba57da JK |
2865 | #if 0 |
2866 | /* It should not be necessary. If the user explicitly changes the value, | |
2867 | value_assign calls write_register_bytes, which writes it. */ | |
2868 | /* It may not be absolutely necessary to specify the PC value for | |
2869 | restarting, but to be safe we use the value that gdb considers | |
2870 | to be current. One case where this might be necessary is if the | |
2871 | user explicitly changes the PC value that gdb considers to be | |
2872 | current. FIXME: Investigate if this is necessary or not. */ | |
2873 | ||
c3192172 | 2874 | #ifdef PRSVADDR_BROKEN |
99fd9e3e SG |
2875 | /* Can't do this under Solaris running on a Sparc, as there seems to be no |
2876 | place to put nPC. In fact, if you use this, nPC seems to be set to some | |
2877 | random garbage. We have to rely on the fact that PC and nPC have been | |
2878 | written previously via PIOCSREG during a register flush. */ | |
2879 | ||
de43d7d0 SG |
2880 | pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)]; |
2881 | pi->prrun.pr_flags != PRSVADDR; | |
99fd9e3e | 2882 | #endif |
59ba57da JK |
2883 | #endif |
2884 | ||
67ac9759 | 2885 | if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop) |
59ba57da JK |
2886 | /* When attaching to a child process, if we forced it to stop with |
2887 | a PIOCSTOP, then we will have set the nopass_next_sigstop flag. | |
2888 | Upon resuming the first time after such a stop, we explicitly | |
2889 | inhibit sending it another SIGSTOP, which would be the normal | |
2890 | result of default signal handling. One potential drawback to | |
2891 | this is that we will also ignore any attempt to by the user | |
2892 | to explicitly continue after the attach with a SIGSTOP. Ultimately | |
2893 | this problem should be dealt with by making the routines that | |
2894 | deal with the inferior a little smarter, and possibly even allow | |
2895 | an inferior to continue running at the same time as gdb. (FIXME?) */ | |
2896 | signal_to_pass = 0; | |
67ac9759 | 2897 | else if (signo == TARGET_SIGNAL_TSTP |
de43d7d0 SG |
2898 | && pi->prstatus.pr_cursig == SIGTSTP |
2899 | && pi->prstatus.pr_action.sa_handler == SIG_DFL) | |
59ba57da JK |
2900 | |
2901 | /* We are about to pass the inferior a SIGTSTP whose action is | |
2902 | SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop | |
2903 | (notifying the parent via wait()), and then keep going from the | |
2904 | same place when the parent is ready for you to keep going. So | |
2905 | under the debugger, it should do nothing (as if the program had | |
2906 | been stopped and then later resumed. Under ptrace, this | |
2907 | happens for us, but under /proc, the system obligingly stops | |
2908 | the process, and wait_for_inferior would have no way of | |
2909 | distinguishing that type of stop (which indicates that we | |
2910 | should just start it again), with a stop due to the pr_trace | |
2911 | field of the prrun_t struct. | |
2912 | ||
2913 | Note that if the SIGTSTP is being caught, we *do* need to pass it, | |
2914 | because the handler needs to get executed. */ | |
2915 | signal_to_pass = 0; | |
2916 | else | |
67ac9759 | 2917 | signal_to_pass = target_signal_to_host (signo); |
99fd9e3e | 2918 | |
59ba57da | 2919 | if (signal_to_pass) |
35f5886e | 2920 | { |
de43d7d0 | 2921 | set_proc_siginfo (pi, signal_to_pass); |
35f5886e FF |
2922 | } |
2923 | else | |
2924 | { | |
de43d7d0 | 2925 | pi->prrun.pr_flags |= PRCSIG; |
35f5886e | 2926 | } |
de43d7d0 | 2927 | pi->nopass_next_sigstop = 0; |
35f5886e FF |
2928 | if (step) |
2929 | { | |
de43d7d0 | 2930 | pi->prrun.pr_flags |= PRSTEP; |
35f5886e | 2931 | } |
8fc2b417 SG |
2932 | |
2933 | /* Don't try to start a process unless it's stopped on an | |
2934 | `event of interest'. Doing so will cause errors. */ | |
2935 | ||
2936 | if ((pi->prstatus.pr_flags & PR_ISTOP) | |
2937 | && ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) | |
35f5886e | 2938 | { |
de43d7d0 | 2939 | perror_with_name (pi->pathname); |
35f5886e FF |
2940 | /* NOTREACHED */ |
2941 | } | |
de43d7d0 SG |
2942 | |
2943 | pi->had_event = 0; | |
2944 | ||
2945 | /* Continue all the other threads that haven't had an event of | |
2946 | interest. */ | |
2947 | ||
2948 | if (pid == -1) | |
2949 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) | |
2950 | { | |
2951 | if (pi != procinfo && !procinfo->had_event) | |
2952 | { | |
2953 | procinfo->prrun.pr_flags &= PRSTEP; | |
2954 | procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG; | |
2955 | ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus); | |
8fc2b417 SG |
2956 | |
2957 | /* Don't try to start a process unless it's stopped on an | |
2958 | `event of interest'. Doing so will cause errors. */ | |
2959 | ||
2960 | if ((procinfo->prstatus.pr_flags & PR_ISTOP) | |
2961 | && ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0) | |
de43d7d0 SG |
2962 | { |
2963 | if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0) | |
2964 | { | |
199b2450 | 2965 | fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno); |
de43d7d0 SG |
2966 | } |
2967 | print_sys_errmsg (procinfo->pathname, errno); | |
2968 | error ("PIOCRUN failed"); | |
2969 | } | |
2970 | ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus); | |
2971 | } | |
2972 | } | |
35f5886e FF |
2973 | } |
2974 | ||
2975 | /* | |
2976 | ||
3fbdd536 | 2977 | LOCAL FUNCTION |
35f5886e | 2978 | |
3fbdd536 | 2979 | procfs_fetch_registers -- fetch current registers from inferior |
35f5886e FF |
2980 | |
2981 | SYNOPSIS | |
2982 | ||
3fbdd536 | 2983 | void procfs_fetch_registers (int regno) |
35f5886e FF |
2984 | |
2985 | DESCRIPTION | |
2986 | ||
2987 | Read the current values of the inferior's registers, both the | |
2988 | general register set and floating point registers (if supported) | |
2989 | and update gdb's idea of their current values. | |
2990 | ||
2991 | */ | |
2992 | ||
3fbdd536 JG |
2993 | static void |
2994 | procfs_fetch_registers (regno) | |
1ab3bf1b | 2995 | int regno; |
35f5886e | 2996 | { |
de43d7d0 SG |
2997 | struct procinfo *pi; |
2998 | ||
2999 | pi = current_procinfo; | |
3000 | ||
3001 | if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1) | |
35f5886e | 3002 | { |
de43d7d0 | 3003 | supply_gregset (&pi->gregset); |
35f5886e FF |
3004 | } |
3005 | #if defined (FP0_REGNUM) | |
de43d7d0 | 3006 | if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1) |
35f5886e | 3007 | { |
de43d7d0 | 3008 | supply_fpregset (&pi->fpregset); |
35f5886e FF |
3009 | } |
3010 | #endif | |
3011 | } | |
3012 | ||
fb182850 FF |
3013 | /* |
3014 | ||
35f5886e FF |
3015 | LOCAL FUNCTION |
3016 | ||
de43d7d0 SG |
3017 | proc_init_failed - called whenever /proc access initialization |
3018 | fails | |
35f5886e FF |
3019 | |
3020 | SYNOPSIS | |
3021 | ||
de43d7d0 | 3022 | static void proc_init_failed (struct procinfo *pi, char *why) |
35f5886e FF |
3023 | |
3024 | DESCRIPTION | |
3025 | ||
3026 | This function is called whenever initialization of access to a /proc | |
3027 | entry fails. It prints a suitable error message, does some cleanup, | |
3028 | and then invokes the standard error processing routine which dumps | |
3029 | us back into the command loop. | |
3030 | */ | |
3031 | ||
3032 | static void | |
de43d7d0 SG |
3033 | proc_init_failed (pi, why) |
3034 | struct procinfo *pi; | |
1ab3bf1b | 3035 | char *why; |
35f5886e | 3036 | { |
de43d7d0 SG |
3037 | print_sys_errmsg (pi->pathname, errno); |
3038 | kill (pi->pid, SIGKILL); | |
3039 | close_proc_file (pi); | |
35f5886e FF |
3040 | error (why); |
3041 | /* NOTREACHED */ | |
3042 | } | |
3043 | ||
3044 | /* | |
3045 | ||
3046 | LOCAL FUNCTION | |
3047 | ||
3048 | close_proc_file - close any currently open /proc entry | |
3049 | ||
3050 | SYNOPSIS | |
3051 | ||
a39ad5ce | 3052 | static void close_proc_file (struct procinfo *pip) |
35f5886e FF |
3053 | |
3054 | DESCRIPTION | |
3055 | ||
3056 | Close any currently open /proc entry and mark the process information | |
3057 | entry as invalid. In order to ensure that we don't try to reuse any | |
3058 | stale information, the pid, fd, and pathnames are explicitly | |
3059 | invalidated, which may be overkill. | |
3060 | ||
3061 | */ | |
3062 | ||
3063 | static void | |
1ab3bf1b JG |
3064 | close_proc_file (pip) |
3065 | struct procinfo *pip; | |
35f5886e | 3066 | { |
de43d7d0 SG |
3067 | struct procinfo *procinfo; |
3068 | ||
3069 | remove_fd (pip); /* Remove fd from poll/select list */ | |
3070 | ||
3071 | close (pip -> fd); | |
3072 | ||
3073 | free (pip -> pathname); | |
3074 | ||
3075 | /* Unlink pip from the procinfo chain. Note pip might not be on the list. */ | |
3076 | ||
3077 | if (procinfo_list == pip) | |
3078 | procinfo_list = pip->next; | |
3079 | else | |
3080 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) | |
3081 | if (procinfo->next == pip) | |
3082 | procinfo->next = pip->next; | |
3083 | ||
3084 | free (pip); | |
35f5886e FF |
3085 | } |
3086 | ||
3087 | /* | |
3088 | ||
3089 | LOCAL FUNCTION | |
3090 | ||
3091 | open_proc_file - open a /proc entry for a given process id | |
3092 | ||
3093 | SYNOPSIS | |
3094 | ||
ec8ceca3 | 3095 | static int open_proc_file (int pid, struct procinfo *pip, int mode) |
35f5886e FF |
3096 | |
3097 | DESCRIPTION | |
3098 | ||
ec8ceca3 JG |
3099 | Given a process id and a mode, close the existing open /proc |
3100 | entry (if any) and open one for the new process id, in the | |
3101 | specified mode. Once it is open, then mark the local process | |
3102 | information structure as valid, which guarantees that the pid, | |
3103 | fd, and pathname fields match an open /proc entry. Returns | |
3104 | zero if the open fails, nonzero otherwise. | |
35f5886e FF |
3105 | |
3106 | Note that the pathname is left intact, even when the open fails, | |
3107 | so that callers can use it to construct meaningful error messages | |
3108 | rather than just "file open failed". | |
8fc2b417 SG |
3109 | |
3110 | Note that for Solaris, the process-id also includes an LWP-id, so we | |
3111 | actually attempt to open that. If we are handed a pid with a 0 LWP-id, | |
3112 | then we will ask the kernel what it is and add it to the pid. Hence, | |
3113 | the pid can be changed by us. | |
35f5886e FF |
3114 | */ |
3115 | ||
3116 | static int | |
ec8ceca3 | 3117 | open_proc_file (pid, pip, mode) |
1ab3bf1b JG |
3118 | int pid; |
3119 | struct procinfo *pip; | |
ec8ceca3 | 3120 | int mode; |
35f5886e | 3121 | { |
8fc2b417 SG |
3122 | int tmp, tmpfd; |
3123 | ||
de43d7d0 SG |
3124 | pip -> next = NULL; |
3125 | pip -> had_event = 0; | |
3126 | pip -> pathname = xmalloc (32); | |
3127 | pip -> pid = pid; | |
3128 | ||
8fc2b417 SG |
3129 | #ifndef PIOCOPENLWP |
3130 | tmp = pid; | |
3131 | #else | |
3132 | tmp = pid & 0xffff; | |
3133 | #endif | |
3134 | ||
3135 | sprintf (pip -> pathname, PROC_NAME_FMT, tmp); | |
3136 | if ((tmpfd = open (pip -> pathname, mode)) < 0) | |
de43d7d0 SG |
3137 | return 0; |
3138 | ||
8fc2b417 SG |
3139 | #ifndef PIOCOPENLWP |
3140 | pip -> fd = tmpfd; | |
3141 | #else | |
3142 | tmp = (pid >> 16) & 0xffff; /* Extract thread id */ | |
3143 | ||
3144 | if (tmp == 0) | |
3145 | { /* Don't know thread id yet */ | |
3146 | if (ioctl (tmpfd, PIOCSTATUS, &pip -> prstatus) < 0) | |
3147 | { | |
3148 | print_sys_errmsg (pip -> pathname, errno); | |
3149 | close (tmpfd); | |
3150 | error ("open_proc_file: PIOCSTATUS failed"); | |
3151 | } | |
3152 | ||
3153 | tmp = pip -> prstatus.pr_who; /* Get thread id from prstatus_t */ | |
3154 | pip -> pid = (tmp << 16) | pid; /* Update pip */ | |
3155 | } | |
3156 | ||
3157 | if ((pip -> fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0) | |
3158 | { | |
3159 | close (tmpfd); | |
3160 | return 0; | |
3161 | } | |
3162 | ||
3163 | #ifdef PIOCSET /* New method */ | |
3164 | { | |
3165 | long pr_flags; | |
3166 | pr_flags = PR_ASYNC; | |
3167 | ioctl (pip -> fd, PIOCSET, &pr_flags); | |
3168 | } | |
3169 | #endif | |
3170 | ||
3171 | close (tmpfd); /* All done with main pid */ | |
3172 | #endif /* PIOCOPENLWP */ | |
3173 | ||
de43d7d0 | 3174 | return 1; |
a39ad5ce FF |
3175 | } |
3176 | ||
f66f459f | 3177 | static char * |
1ab3bf1b JG |
3178 | mappingflags (flags) |
3179 | long flags; | |
a39ad5ce | 3180 | { |
5c1c5e67 | 3181 | static char asciiflags[8]; |
a39ad5ce | 3182 | |
5c1c5e67 FF |
3183 | strcpy (asciiflags, "-------"); |
3184 | #if defined (MA_PHYS) | |
3185 | if (flags & MA_PHYS) asciiflags[0] = 'd'; | |
3186 | #endif | |
3187 | if (flags & MA_STACK) asciiflags[1] = 's'; | |
3188 | if (flags & MA_BREAK) asciiflags[2] = 'b'; | |
3189 | if (flags & MA_SHARED) asciiflags[3] = 's'; | |
3190 | if (flags & MA_READ) asciiflags[4] = 'r'; | |
3191 | if (flags & MA_WRITE) asciiflags[5] = 'w'; | |
3192 | if (flags & MA_EXEC) asciiflags[6] = 'x'; | |
a39ad5ce FF |
3193 | return (asciiflags); |
3194 | } | |
3195 | ||
3196 | static void | |
cc221e76 FF |
3197 | info_proc_flags (pip, summary) |
3198 | struct procinfo *pip; | |
3199 | int summary; | |
3200 | { | |
3201 | struct trans *transp; | |
3202 | ||
3203 | printf_filtered ("%-32s", "Process status flags:"); | |
3204 | if (!summary) | |
3205 | { | |
3206 | printf_filtered ("\n\n"); | |
3207 | } | |
3208 | for (transp = pr_flag_table; transp -> name != NULL; transp++) | |
3209 | { | |
3210 | if (pip -> prstatus.pr_flags & transp -> value) | |
3211 | { | |
3212 | if (summary) | |
3213 | { | |
3214 | printf_filtered ("%s ", transp -> name); | |
3215 | } | |
3216 | else | |
3217 | { | |
3218 | printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc); | |
3219 | } | |
3220 | } | |
3221 | } | |
3222 | printf_filtered ("\n"); | |
3223 | } | |
3224 | ||
3225 | static void | |
3226 | info_proc_stop (pip, summary) | |
3227 | struct procinfo *pip; | |
3228 | int summary; | |
3229 | { | |
3230 | struct trans *transp; | |
3231 | int why; | |
3232 | int what; | |
3233 | ||
3234 | why = pip -> prstatus.pr_why; | |
3235 | what = pip -> prstatus.pr_what; | |
3236 | ||
3237 | if (pip -> prstatus.pr_flags & PR_STOPPED) | |
3238 | { | |
3239 | printf_filtered ("%-32s", "Reason for stopping:"); | |
3240 | if (!summary) | |
3241 | { | |
3242 | printf_filtered ("\n\n"); | |
3243 | } | |
3244 | for (transp = pr_why_table; transp -> name != NULL; transp++) | |
3245 | { | |
3246 | if (why == transp -> value) | |
3247 | { | |
3248 | if (summary) | |
3249 | { | |
3250 | printf_filtered ("%s ", transp -> name); | |
3251 | } | |
3252 | else | |
3253 | { | |
3254 | printf_filtered ("\t%-16s %s.\n", | |
3255 | transp -> name, transp -> desc); | |
3256 | } | |
3257 | break; | |
3258 | } | |
3259 | } | |
3260 | ||
3261 | /* Use the pr_why field to determine what the pr_what field means, and | |
3262 | print more information. */ | |
3263 | ||
3264 | switch (why) | |
3265 | { | |
3266 | case PR_REQUESTED: | |
3267 | /* pr_what is unused for this case */ | |
3268 | break; | |
3269 | case PR_JOBCONTROL: | |
3270 | case PR_SIGNALLED: | |
3271 | if (summary) | |
3272 | { | |
3273 | printf_filtered ("%s ", signalname (what)); | |
3274 | } | |
3275 | else | |
3276 | { | |
3277 | printf_filtered ("\t%-16s %s.\n", signalname (what), | |
4ace50a5 | 3278 | safe_strsignal (what)); |
cc221e76 FF |
3279 | } |
3280 | break; | |
3281 | case PR_SYSENTRY: | |
3282 | if (summary) | |
3283 | { | |
3284 | printf_filtered ("%s ", syscallname (what)); | |
3285 | } | |
3286 | else | |
3287 | { | |
3288 | printf_filtered ("\t%-16s %s.\n", syscallname (what), | |
3289 | "Entered this system call"); | |
3290 | } | |
3291 | break; | |
3292 | case PR_SYSEXIT: | |
3293 | if (summary) | |
3294 | { | |
3295 | printf_filtered ("%s ", syscallname (what)); | |
3296 | } | |
3297 | else | |
3298 | { | |
3299 | printf_filtered ("\t%-16s %s.\n", syscallname (what), | |
3300 | "Returned from this system call"); | |
3301 | } | |
3302 | break; | |
3303 | case PR_FAULTED: | |
3304 | if (summary) | |
3305 | { | |
3306 | printf_filtered ("%s ", | |
3307 | lookupname (faults_table, what, "fault")); | |
3308 | } | |
3309 | else | |
3310 | { | |
3311 | printf_filtered ("\t%-16s %s.\n", | |
3312 | lookupname (faults_table, what, "fault"), | |
3313 | lookupdesc (faults_table, what)); | |
3314 | } | |
3315 | break; | |
3316 | } | |
3317 | printf_filtered ("\n"); | |
3318 | } | |
3319 | } | |
3320 | ||
3321 | static void | |
3322 | info_proc_siginfo (pip, summary) | |
3323 | struct procinfo *pip; | |
3324 | int summary; | |
3325 | { | |
3326 | struct siginfo *sip; | |
3327 | ||
3328 | if ((pip -> prstatus.pr_flags & PR_STOPPED) && | |
3329 | (pip -> prstatus.pr_why == PR_SIGNALLED || | |
3330 | pip -> prstatus.pr_why == PR_FAULTED)) | |
3331 | { | |
3332 | printf_filtered ("%-32s", "Additional signal/fault info:"); | |
3333 | sip = &pip -> prstatus.pr_info; | |
3334 | if (summary) | |
3335 | { | |
3336 | printf_filtered ("%s ", signalname (sip -> si_signo)); | |
3337 | if (sip -> si_errno > 0) | |
3338 | { | |
4ace50a5 | 3339 | printf_filtered ("%s ", errnoname (sip -> si_errno)); |
cc221e76 FF |
3340 | } |
3341 | if (sip -> si_code <= 0) | |
3342 | { | |
25286543 SG |
3343 | printf_filtered ("sent by %s, uid %d ", |
3344 | target_pid_to_str (sip -> si_pid), | |
cc221e76 FF |
3345 | sip -> si_uid); |
3346 | } | |
3347 | else | |
3348 | { | |
3349 | printf_filtered ("%s ", sigcodename (sip)); | |
3350 | if ((sip -> si_signo == SIGILL) || | |
3351 | (sip -> si_signo == SIGFPE) || | |
3352 | (sip -> si_signo == SIGSEGV) || | |
3353 | (sip -> si_signo == SIGBUS)) | |
3354 | { | |
b9e58503 PS |
3355 | printf_filtered ("addr=%#lx ", |
3356 | (unsigned long) sip -> si_addr); | |
cc221e76 FF |
3357 | } |
3358 | else if ((sip -> si_signo == SIGCHLD)) | |
3359 | { | |
25286543 SG |
3360 | printf_filtered ("child %s, status %u ", |
3361 | target_pid_to_str (sip -> si_pid), | |
cc221e76 FF |
3362 | sip -> si_status); |
3363 | } | |
3364 | else if ((sip -> si_signo == SIGPOLL)) | |
3365 | { | |
3366 | printf_filtered ("band %u ", sip -> si_band); | |
3367 | } | |
3368 | } | |
3369 | } | |
3370 | else | |
3371 | { | |
3372 | printf_filtered ("\n\n"); | |
3373 | printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo), | |
4ace50a5 | 3374 | safe_strsignal (sip -> si_signo)); |
cc221e76 FF |
3375 | if (sip -> si_errno > 0) |
3376 | { | |
3377 | printf_filtered ("\t%-16s %s.\n", | |
4ace50a5 FF |
3378 | errnoname (sip -> si_errno), |
3379 | safe_strerror (sip -> si_errno)); | |
cc221e76 FF |
3380 | } |
3381 | if (sip -> si_code <= 0) | |
3382 | { | |
25286543 | 3383 | printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */ |
cc221e76 FF |
3384 | "PID of process sending signal"); |
3385 | printf_filtered ("\t%-16u %s\n", sip -> si_uid, | |
3386 | "UID of process sending signal"); | |
3387 | } | |
3388 | else | |
3389 | { | |
3390 | printf_filtered ("\t%-16s %s.\n", sigcodename (sip), | |
3391 | sigcodedesc (sip)); | |
3392 | if ((sip -> si_signo == SIGILL) || | |
3393 | (sip -> si_signo == SIGFPE)) | |
3394 | { | |
b9e58503 PS |
3395 | printf_filtered ("\t%#-16lx %s.\n", |
3396 | (unsigned long) sip -> si_addr, | |
cc221e76 FF |
3397 | "Address of faulting instruction"); |
3398 | } | |
3399 | else if ((sip -> si_signo == SIGSEGV) || | |
3400 | (sip -> si_signo == SIGBUS)) | |
3401 | { | |
b9e58503 PS |
3402 | printf_filtered ("\t%#-16lx %s.\n", |
3403 | (unsigned long) sip -> si_addr, | |
cc221e76 FF |
3404 | "Address of faulting memory reference"); |
3405 | } | |
3406 | else if ((sip -> si_signo == SIGCHLD)) | |
3407 | { | |
25286543 | 3408 | printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */ |
cc221e76 FF |
3409 | "Child process ID"); |
3410 | printf_filtered ("\t%-16u %s.\n", sip -> si_status, | |
3411 | "Child process exit value or signal"); | |
3412 | } | |
3413 | else if ((sip -> si_signo == SIGPOLL)) | |
3414 | { | |
3415 | printf_filtered ("\t%-16u %s.\n", sip -> si_band, | |
3416 | "Band event for POLL_{IN,OUT,MSG}"); | |
3417 | } | |
3418 | } | |
3419 | } | |
3420 | printf_filtered ("\n"); | |
3421 | } | |
3422 | } | |
3423 | ||
3424 | static void | |
3425 | info_proc_syscalls (pip, summary) | |
3426 | struct procinfo *pip; | |
3427 | int summary; | |
3428 | { | |
3429 | int syscallnum; | |
3430 | ||
3431 | if (!summary) | |
3432 | { | |
3433 | ||
3434 | #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */ | |
3435 | if (pip -> prstatus.pr_flags & PR_ASLEEP) | |
3436 | { | |
3437 | int syscallnum = pip -> prstatus.pr_reg[R_D0]; | |
3438 | if (summary) | |
3439 | { | |
3440 | printf_filtered ("%-32s", "Sleeping in system call:"); | |
3441 | printf_filtered ("%s", syscallname (syscallnum)); | |
3442 | } | |
3443 | else | |
3444 | { | |
3445 | printf_filtered ("Sleeping in system call '%s'.\n", | |
3446 | syscallname (syscallnum)); | |
3447 | } | |
3448 | } | |
3449 | #endif | |
3450 | ||
3451 | if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0) | |
3452 | { | |
3453 | print_sys_errmsg (pip -> pathname, errno); | |
3454 | error ("PIOCGENTRY failed"); | |
3455 | } | |
3456 | ||
3457 | if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0) | |
3458 | { | |
3459 | print_sys_errmsg (pip -> pathname, errno); | |
3460 | error ("PIOCGEXIT failed"); | |
3461 | } | |
3462 | ||
3463 | printf_filtered ("System call tracing information:\n\n"); | |
3464 | ||
3465 | printf_filtered ("\t%-12s %-8s %-8s\n", | |
3466 | "System call", | |
3467 | "Entry", | |
3468 | "Exit"); | |
3469 | for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++) | |
3470 | { | |
3471 | QUIT; | |
3472 | if (syscall_table[syscallnum] != NULL) | |
8fc2b417 SG |
3473 | printf_filtered ("\t%-12s ", syscall_table[syscallnum]); |
3474 | else | |
3475 | printf_filtered ("\t%-12d ", syscallnum); | |
3476 | ||
3477 | printf_filtered ("%-8s ", | |
3478 | prismember (&pip -> entryset, syscallnum) | |
3479 | ? "on" : "off"); | |
3480 | printf_filtered ("%-8s ", | |
3481 | prismember (&pip -> exitset, syscallnum) | |
3482 | ? "on" : "off"); | |
3483 | printf_filtered ("\n"); | |
3484 | } | |
cc221e76 FF |
3485 | printf_filtered ("\n"); |
3486 | } | |
3487 | } | |
3488 | ||
3489 | static char * | |
3490 | signalname (signo) | |
3491 | int signo; | |
3492 | { | |
26a859ec | 3493 | const char *name; |
4ace50a5 FF |
3494 | static char locbuf[32]; |
3495 | ||
3496 | name = strsigno (signo); | |
3497 | if (name == NULL) | |
3498 | { | |
3499 | sprintf (locbuf, "Signal %d", signo); | |
3500 | } | |
3501 | else | |
3502 | { | |
3503 | sprintf (locbuf, "%s (%d)", name, signo); | |
3504 | } | |
3505 | return (locbuf); | |
3506 | } | |
3507 | ||
3508 | static char * | |
3509 | errnoname (errnum) | |
3510 | int errnum; | |
3511 | { | |
26a859ec | 3512 | const char *name; |
cc221e76 FF |
3513 | static char locbuf[32]; |
3514 | ||
4ace50a5 FF |
3515 | name = strerrno (errnum); |
3516 | if (name == NULL) | |
cc221e76 | 3517 | { |
4ace50a5 | 3518 | sprintf (locbuf, "Errno %d", errnum); |
cc221e76 FF |
3519 | } |
3520 | else | |
3521 | { | |
4ace50a5 | 3522 | sprintf (locbuf, "%s (%d)", name, errnum); |
cc221e76 FF |
3523 | } |
3524 | return (locbuf); | |
3525 | } | |
3526 | ||
3527 | static void | |
3528 | info_proc_signals (pip, summary) | |
3529 | struct procinfo *pip; | |
3530 | int summary; | |
3531 | { | |
3532 | int signo; | |
3533 | ||
3534 | if (!summary) | |
3535 | { | |
3536 | if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0) | |
3537 | { | |
3538 | print_sys_errmsg (pip -> pathname, errno); | |
3539 | error ("PIOCGTRACE failed"); | |
3540 | } | |
3541 | ||
3542 | printf_filtered ("Disposition of signals:\n\n"); | |
3543 | printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n", | |
3544 | "Signal", "Trace", "Hold", "Pending", "Description"); | |
3545 | for (signo = 0; signo < NSIG; signo++) | |
3546 | { | |
3547 | QUIT; | |
3548 | printf_filtered ("\t%-15s ", signalname (signo)); | |
3549 | printf_filtered ("%-8s ", | |
3550 | prismember (&pip -> trace, signo) | |
3551 | ? "on" : "off"); | |
3552 | printf_filtered ("%-8s ", | |
3553 | prismember (&pip -> prstatus.pr_sighold, signo) | |
3554 | ? "on" : "off"); | |
2592eef8 PS |
3555 | |
3556 | #ifdef PROCFS_SIGPEND_OFFSET | |
3557 | /* Alpha OSF/1 numbers the pending signals from 1. */ | |
3558 | printf_filtered ("%-8s ", | |
3559 | (signo ? prismember (&pip -> prstatus.pr_sigpend, | |
3560 | signo - 1) | |
3561 | : 0) | |
3562 | ? "yes" : "no"); | |
3563 | #else | |
cc221e76 FF |
3564 | printf_filtered ("%-8s ", |
3565 | prismember (&pip -> prstatus.pr_sigpend, signo) | |
3566 | ? "yes" : "no"); | |
2592eef8 | 3567 | #endif |
4ace50a5 | 3568 | printf_filtered (" %s\n", safe_strsignal (signo)); |
cc221e76 FF |
3569 | } |
3570 | printf_filtered ("\n"); | |
3571 | } | |
3572 | } | |
3573 | ||
3574 | static void | |
3575 | info_proc_faults (pip, summary) | |
3576 | struct procinfo *pip; | |
3577 | int summary; | |
3578 | { | |
3579 | struct trans *transp; | |
3580 | ||
3581 | if (!summary) | |
3582 | { | |
3583 | if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0) | |
3584 | { | |
3585 | print_sys_errmsg (pip -> pathname, errno); | |
3586 | error ("PIOCGFAULT failed"); | |
3587 | } | |
3588 | ||
3589 | printf_filtered ("Current traced hardware fault set:\n\n"); | |
3590 | printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace"); | |
3591 | ||
3592 | for (transp = faults_table; transp -> name != NULL; transp++) | |
3593 | { | |
3594 | QUIT; | |
3595 | printf_filtered ("\t%-12s ", transp -> name); | |
3596 | printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value) | |
3597 | ? "on" : "off"); | |
3598 | printf_filtered ("\n"); | |
3599 | } | |
3600 | printf_filtered ("\n"); | |
3601 | } | |
3602 | } | |
3603 | ||
3604 | static void | |
3605 | info_proc_mappings (pip, summary) | |
1ab3bf1b | 3606 | struct procinfo *pip; |
cc221e76 | 3607 | int summary; |
a39ad5ce FF |
3608 | { |
3609 | int nmap; | |
3610 | struct prmap *prmaps; | |
3611 | struct prmap *prmap; | |
3612 | ||
cc221e76 | 3613 | if (!summary) |
a39ad5ce | 3614 | { |
cc221e76 | 3615 | printf_filtered ("Mapped address spaces:\n\n"); |
2592eef8 PS |
3616 | #ifdef BFD_HOST_64_BIT |
3617 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3618 | #else | |
5c1c5e67 | 3619 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
2592eef8 | 3620 | #endif |
cc221e76 FF |
3621 | "Start Addr", |
3622 | " End Addr", | |
3623 | " Size", | |
3624 | " Offset", | |
3625 | "Flags"); | |
3626 | if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0) | |
a39ad5ce | 3627 | { |
cc221e76 FF |
3628 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
3629 | if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0) | |
a39ad5ce | 3630 | { |
cc221e76 FF |
3631 | for (prmap = prmaps; prmap -> pr_size; ++prmap) |
3632 | { | |
2592eef8 PS |
3633 | #ifdef BFD_HOST_64_BIT |
3634 | printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n", | |
3635 | #else | |
3636 | printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n", | |
3637 | #endif | |
3638 | (unsigned long)prmap -> pr_vaddr, | |
3639 | (unsigned long)prmap -> pr_vaddr | |
3640 | + prmap -> pr_size - 1, | |
cc221e76 FF |
3641 | prmap -> pr_size, |
3642 | prmap -> pr_off, | |
3643 | mappingflags (prmap -> pr_mflags)); | |
3644 | } | |
a39ad5ce FF |
3645 | } |
3646 | } | |
cc221e76 | 3647 | printf_filtered ("\n"); |
a39ad5ce | 3648 | } |
a39ad5ce FF |
3649 | } |
3650 | ||
3651 | /* | |
3652 | ||
3653 | LOCAL FUNCTION | |
3654 | ||
cc221e76 | 3655 | info_proc -- implement the "info proc" command |
a39ad5ce FF |
3656 | |
3657 | SYNOPSIS | |
3658 | ||
cc221e76 | 3659 | void info_proc (char *args, int from_tty) |
a39ad5ce FF |
3660 | |
3661 | DESCRIPTION | |
3662 | ||
3663 | Implement gdb's "info proc" command by using the /proc interface | |
3664 | to print status information about any currently running process. | |
3665 | ||
3666 | Examples of the use of "info proc" are: | |
3667 | ||
cc221e76 FF |
3668 | info proc (prints summary info for current inferior) |
3669 | info proc 123 (prints summary info for process with pid 123) | |
3670 | info proc mappings (prints address mappings) | |
3671 | info proc times (prints process/children times) | |
3672 | info proc id (prints pid, ppid, gid, sid, etc) | |
3fbdd536 | 3673 | FIXME: i proc id not implemented. |
cc221e76 | 3674 | info proc status (prints general process state info) |
3fbdd536 | 3675 | FIXME: i proc status not implemented. |
cc221e76 FF |
3676 | info proc signals (prints info about signal handling) |
3677 | info proc all (prints all info) | |
a39ad5ce FF |
3678 | |
3679 | */ | |
3680 | ||
3681 | static void | |
cc221e76 | 3682 | info_proc (args, from_tty) |
1ab3bf1b JG |
3683 | char *args; |
3684 | int from_tty; | |
a39ad5ce | 3685 | { |
8fc2b417 | 3686 | int pid = inferior_pid; |
a39ad5ce FF |
3687 | struct procinfo *pip; |
3688 | struct cleanup *old_chain; | |
cc221e76 FF |
3689 | char **argv; |
3690 | int argsize; | |
3691 | int summary = 1; | |
3692 | int flags = 0; | |
3693 | int syscalls = 0; | |
3694 | int signals = 0; | |
3695 | int faults = 0; | |
3696 | int mappings = 0; | |
3697 | int times = 0; | |
3698 | int id = 0; | |
3699 | int status = 0; | |
3700 | int all = 0; | |
8fc2b417 | 3701 | int nlwp; |
47ef0da5 | 3702 | int *lwps; |
a39ad5ce FF |
3703 | |
3704 | old_chain = make_cleanup (null_cleanup, 0); | |
3705 | ||
de43d7d0 SG |
3706 | /* Default to using the current inferior if no pid specified. Note |
3707 | that inferior_pid may be 0, hence we set okerr. */ | |
a39ad5ce | 3708 | |
de43d7d0 | 3709 | pip = find_procinfo (inferior_pid, 1); |
a39ad5ce | 3710 | |
a39ad5ce | 3711 | if (args != NULL) |
35f5886e | 3712 | { |
cc221e76 | 3713 | if ((argv = buildargv (args)) == NULL) |
a39ad5ce | 3714 | { |
cc221e76 FF |
3715 | nomem (0); |
3716 | } | |
3717 | make_cleanup (freeargv, (char *) argv); | |
3718 | ||
3719 | while (*argv != NULL) | |
3720 | { | |
3721 | argsize = strlen (*argv); | |
3722 | if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0) | |
3723 | { | |
3724 | summary = 0; | |
3725 | all = 1; | |
3726 | } | |
3727 | else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0) | |
3728 | { | |
3729 | summary = 0; | |
3730 | faults = 1; | |
3731 | } | |
3732 | else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0) | |
3733 | { | |
3734 | summary = 0; | |
3735 | flags = 1; | |
3736 | } | |
3737 | else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0) | |
3738 | { | |
3739 | summary = 0; | |
3740 | id = 1; | |
3741 | } | |
3742 | else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0) | |
3743 | { | |
3744 | summary = 0; | |
3745 | mappings = 1; | |
3746 | } | |
3747 | else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0) | |
3748 | { | |
3749 | summary = 0; | |
3750 | signals = 1; | |
3751 | } | |
3752 | else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0) | |
3753 | { | |
3754 | summary = 0; | |
3755 | status = 1; | |
3756 | } | |
3757 | else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0) | |
3758 | { | |
3759 | summary = 0; | |
3760 | syscalls = 1; | |
3761 | } | |
3762 | else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0) | |
a39ad5ce | 3763 | { |
cc221e76 FF |
3764 | summary = 0; |
3765 | times = 1; | |
a39ad5ce | 3766 | } |
de43d7d0 | 3767 | else if ((pid = atoi (*argv)) > 0) |
a39ad5ce | 3768 | { |
de43d7d0 SG |
3769 | pip = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
3770 | memset (pip, 0, sizeof (*pip)); | |
3771 | ||
3772 | pip->pid = pid; | |
ec8ceca3 | 3773 | if (!open_proc_file (pid, pip, O_RDONLY)) |
a39ad5ce FF |
3774 | { |
3775 | perror_with_name (pip -> pathname); | |
3776 | /* NOTREACHED */ | |
3777 | } | |
8fc2b417 | 3778 | pid = pip->pid; |
a39ad5ce FF |
3779 | make_cleanup (close_proc_file, pip); |
3780 | } | |
cc221e76 FF |
3781 | else if (**argv != '\000') |
3782 | { | |
3783 | error ("Unrecognized or ambiguous keyword `%s'.", *argv); | |
3784 | } | |
3785 | argv++; | |
a39ad5ce | 3786 | } |
35f5886e | 3787 | } |
a39ad5ce FF |
3788 | |
3789 | /* If we don't have a valid open process at this point, then we have no | |
3790 | inferior or didn't specify a specific pid. */ | |
3791 | ||
de43d7d0 | 3792 | if (!pip) |
35f5886e | 3793 | { |
6fe90fc8 JK |
3794 | error ("\ |
3795 | No process. Start debugging a program or specify an explicit process ID."); | |
35f5886e | 3796 | } |
a39ad5ce | 3797 | if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0) |
35f5886e | 3798 | { |
a39ad5ce FF |
3799 | print_sys_errmsg (pip -> pathname, errno); |
3800 | error ("PIOCSTATUS failed"); | |
35f5886e | 3801 | } |
a39ad5ce | 3802 | |
8fc2b417 SG |
3803 | #ifdef PIOCLWPIDS |
3804 | nlwp = pip->prstatus.pr_nlwp; | |
3805 | lwps = alloca ((2 * nlwp + 2) * sizeof (id_t)); | |
cc221e76 | 3806 | |
8fc2b417 | 3807 | if (ioctl (pip->fd, PIOCLWPIDS, lwps)) |
cc221e76 | 3808 | { |
8fc2b417 SG |
3809 | print_sys_errmsg (pip -> pathname, errno); |
3810 | error ("PIOCSTATUS failed"); | |
cc221e76 | 3811 | } |
8fc2b417 SG |
3812 | #else /* PIOCLWPIDS */ |
3813 | nlwp = 1; | |
47ef0da5 | 3814 | lwps = alloca ((2 * nlwp + 2) * sizeof *lwps); |
8fc2b417 SG |
3815 | lwps[0] = 0; |
3816 | #endif /* PIOCLWPIDS */ | |
3817 | ||
3818 | for (; nlwp > 0; nlwp--, lwps++) | |
cc221e76 | 3819 | { |
8fc2b417 SG |
3820 | pip = find_procinfo ((*lwps << 16) | pid, 1); |
3821 | ||
3822 | if (!pip) | |
3823 | { | |
3824 | pip = (struct procinfo *) xmalloc (sizeof (struct procinfo)); | |
3825 | memset (pip, 0, sizeof (*pip)); | |
3826 | if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY)) | |
3827 | continue; | |
3828 | ||
3829 | make_cleanup (close_proc_file, pip); | |
3830 | ||
3831 | if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0) | |
3832 | { | |
3833 | print_sys_errmsg (pip -> pathname, errno); | |
3834 | error ("PIOCSTATUS failed"); | |
3835 | } | |
3836 | } | |
3837 | ||
3838 | /* Print verbose information of the requested type(s), or just a summary | |
3839 | of the information for all types. */ | |
3840 | ||
3841 | printf_filtered ("\nInformation for %s.%d:\n\n", pip -> pathname, *lwps); | |
3842 | if (summary || all || flags) | |
3843 | { | |
3844 | info_proc_flags (pip, summary); | |
3845 | } | |
3846 | if (summary || all) | |
3847 | { | |
3848 | info_proc_stop (pip, summary); | |
3849 | } | |
3850 | if (summary || all || signals || faults) | |
3851 | { | |
3852 | info_proc_siginfo (pip, summary); | |
3853 | } | |
3854 | if (summary || all || syscalls) | |
3855 | { | |
3856 | info_proc_syscalls (pip, summary); | |
3857 | } | |
3858 | if (summary || all || mappings) | |
3859 | { | |
3860 | info_proc_mappings (pip, summary); | |
3861 | } | |
3862 | if (summary || all || signals) | |
3863 | { | |
3864 | info_proc_signals (pip, summary); | |
3865 | } | |
3866 | if (summary || all || faults) | |
3867 | { | |
3868 | info_proc_faults (pip, summary); | |
3869 | } | |
3870 | printf_filtered ("\n"); | |
3871 | ||
3872 | /* All done, deal with closing any temporary process info structure, | |
3873 | freeing temporary memory , etc. */ | |
3874 | ||
3875 | do_cleanups (old_chain); | |
cc221e76 | 3876 | } |
8fc2b417 SG |
3877 | } |
3878 | ||
3879 | /* | |
3880 | ||
3881 | LOCAL FUNCTION | |
3882 | ||
3883 | modify_inherit_on_fork_flag - Change the inherit-on-fork flag | |
3884 | ||
3885 | SYNOPSIS | |
3886 | ||
3887 | void modify_inherit_on_fork_flag (fd, flag) | |
3888 | ||
3889 | DESCRIPTION | |
3890 | ||
3891 | Call this routine to modify the inherit-on-fork flag. This routine is | |
3892 | just a nice wrapper to hide the #ifdefs needed by various systems to | |
3893 | control this flag. | |
3894 | ||
3895 | */ | |
3896 | ||
3897 | static void | |
3898 | modify_inherit_on_fork_flag (fd, flag) | |
3899 | int fd; | |
3900 | int flag; | |
3901 | { | |
b607efe7 | 3902 | #ifdef PIOCSET |
8fc2b417 | 3903 | long pr_flags; |
b607efe7 | 3904 | #endif |
8fc2b417 SG |
3905 | int retval; |
3906 | ||
3907 | #ifdef PIOCSET /* New method */ | |
3908 | pr_flags = PR_FORK; | |
3909 | if (flag) | |
3910 | retval = ioctl (fd, PIOCSET, &pr_flags); | |
3911 | else | |
3912 | retval = ioctl (fd, PIOCRESET, &pr_flags); | |
3913 | ||
3914 | #else | |
3915 | #ifdef PIOCSFORK /* Original method */ | |
3916 | if (flag) | |
3917 | retval = ioctl (fd, PIOCSFORK, NULL); | |
3918 | else | |
3919 | retval = ioctl (fd, PIOCRFORK, NULL); | |
3920 | #else | |
3921 | Neither PR_FORK nor PIOCSFORK exist!!! | |
3922 | #endif | |
3923 | #endif | |
3924 | ||
3925 | if (!retval) | |
3926 | return; | |
3927 | ||
3928 | print_sys_errmsg ("modify_inherit_on_fork_flag", errno); | |
3929 | error ("PIOCSFORK or PR_FORK modification failed"); | |
3930 | } | |
3931 | ||
3932 | /* | |
3933 | ||
3934 | LOCAL FUNCTION | |
3935 | ||
3936 | modify_run_on_last_close_flag - Change the run-on-last-close flag | |
3937 | ||
3938 | SYNOPSIS | |
3939 | ||
3940 | void modify_run_on_last_close_flag (fd, flag) | |
3941 | ||
3942 | DESCRIPTION | |
3943 | ||
3944 | Call this routine to modify the run-on-last-close flag. This routine | |
3945 | is just a nice wrapper to hide the #ifdefs needed by various systems to | |
3946 | control this flag. | |
3947 | ||
3948 | */ | |
3949 | ||
3950 | static void | |
3951 | modify_run_on_last_close_flag (fd, flag) | |
3952 | int fd; | |
3953 | int flag; | |
3954 | { | |
b607efe7 | 3955 | #ifdef PIOCSET |
8fc2b417 | 3956 | long pr_flags; |
b607efe7 | 3957 | #endif |
8fc2b417 SG |
3958 | int retval; |
3959 | ||
3960 | #ifdef PIOCSET /* New method */ | |
3961 | pr_flags = PR_RLC; | |
3962 | if (flag) | |
3963 | retval = ioctl (fd, PIOCSET, &pr_flags); | |
3964 | else | |
3965 | retval = ioctl (fd, PIOCRESET, &pr_flags); | |
3966 | ||
3967 | #else | |
3968 | #ifdef PIOCSRLC /* Original method */ | |
3969 | if (flag) | |
3970 | retval = ioctl (fd, PIOCSRLC, NULL); | |
3971 | else | |
3972 | retval = ioctl (fd, PIOCRRLC, NULL); | |
3973 | #else | |
3974 | Neither PR_RLC nor PIOCSRLC exist!!! | |
3975 | #endif | |
3976 | #endif | |
3977 | ||
3978 | if (!retval) | |
3979 | return; | |
3980 | ||
3981 | print_sys_errmsg ("modify_run_on_last_close_flag", errno); | |
3982 | error ("PIOCSRLC or PR_RLC modification failed"); | |
3983 | } | |
3984 | ||
3985 | /* | |
3986 | ||
3987 | LOCAL FUNCTION | |
3988 | ||
3989 | procfs_clear_syscall_trap -- Deletes the trap for the specified system call. | |
3990 | ||
3991 | SYNOPSIS | |
3992 | ||
3993 | void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok) | |
3994 | ||
3995 | DESCRIPTION | |
3996 | ||
3997 | This function function disables traps for the specified system call. | |
3998 | errok is non-zero if errors should be ignored. | |
3999 | */ | |
4000 | ||
4001 | static void | |
4002 | procfs_clear_syscall_trap (pi, syscall_num, errok) | |
4003 | struct procinfo *pi; | |
4004 | int syscall_num; | |
4005 | int errok; | |
4006 | { | |
4007 | sysset_t sysset; | |
4008 | int goterr, i; | |
4009 | ||
4010 | goterr = ioctl (pi->fd, PIOCGENTRY, &sysset) < 0; | |
4011 | ||
4012 | if (goterr && !errok) | |
cc221e76 | 4013 | { |
8fc2b417 SG |
4014 | print_sys_errmsg (pi->pathname, errno); |
4015 | error ("PIOCGENTRY failed"); | |
cc221e76 | 4016 | } |
8fc2b417 SG |
4017 | |
4018 | if (!goterr) | |
cc221e76 | 4019 | { |
8fc2b417 SG |
4020 | prdelset (&sysset, syscall_num); |
4021 | ||
4022 | if ((ioctl (pi->fd, PIOCSENTRY, &sysset) < 0) && !errok) | |
4023 | { | |
4024 | print_sys_errmsg (pi->pathname, errno); | |
4025 | error ("PIOCSENTRY failed"); | |
4026 | } | |
cc221e76 | 4027 | } |
8fc2b417 SG |
4028 | |
4029 | goterr = ioctl (pi->fd, PIOCGEXIT, &sysset) < 0; | |
4030 | ||
4031 | if (goterr && !errok) | |
cc221e76 | 4032 | { |
8fc2b417 SG |
4033 | procfs_clear_syscall_trap (pi, syscall_num, 1); |
4034 | print_sys_errmsg (pi->pathname, errno); | |
4035 | error ("PIOCGEXIT failed"); | |
cc221e76 | 4036 | } |
8fc2b417 SG |
4037 | |
4038 | if (!goterr) | |
cc221e76 | 4039 | { |
8fc2b417 SG |
4040 | praddset (&sysset, syscall_num); |
4041 | ||
4042 | if ((ioctl (pi->fd, PIOCSEXIT, &sysset) < 0) && !errok) | |
4043 | { | |
4044 | procfs_clear_syscall_trap (pi, syscall_num, 1); | |
4045 | print_sys_errmsg (pi->pathname, errno); | |
4046 | error ("PIOCSEXIT failed"); | |
4047 | } | |
cc221e76 | 4048 | } |
8fc2b417 SG |
4049 | |
4050 | if (!pi->syscall_handlers) | |
cc221e76 | 4051 | { |
8fc2b417 SG |
4052 | if (!errok) |
4053 | error ("procfs_clear_syscall_trap: syscall_handlers is empty"); | |
4054 | return; | |
cc221e76 | 4055 | } |
a39ad5ce | 4056 | |
8fc2b417 | 4057 | /* Remove handler func from the handler list */ |
a39ad5ce | 4058 | |
8fc2b417 SG |
4059 | for (i = 0; i < pi->num_syscall_handlers; i++) |
4060 | if (pi->syscall_handlers[i].syscall_num == syscall_num) | |
4061 | { | |
4062 | if (i + 1 != pi->num_syscall_handlers) | |
4063 | { /* Not the last entry. | |
4064 | Move subsequent entries fwd. */ | |
4065 | memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1], | |
4066 | (pi->num_syscall_handlers - i - 1) | |
4067 | * sizeof (struct procfs_syscall_handler)); | |
4068 | } | |
4069 | ||
4070 | pi->syscall_handlers = xrealloc (pi->syscall_handlers, | |
4071 | (pi->num_syscall_handlers - 1) | |
4072 | * sizeof (struct procfs_syscall_handler)); | |
4073 | pi->num_syscall_handlers--; | |
4074 | return; | |
4075 | } | |
4076 | ||
4077 | if (!errok) | |
4078 | error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d", | |
4079 | syscall_num); | |
a39ad5ce FF |
4080 | } |
4081 | ||
de43d7d0 SG |
4082 | /* |
4083 | ||
4084 | LOCAL FUNCTION | |
4085 | ||
8fc2b417 SG |
4086 | procfs_set_syscall_trap -- arrange for a function to be called when the |
4087 | child executes the specified system call. | |
de43d7d0 SG |
4088 | |
4089 | SYNOPSIS | |
4090 | ||
8fc2b417 SG |
4091 | void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags, |
4092 | syscall_func_t *function) | |
de43d7d0 SG |
4093 | |
4094 | DESCRIPTION | |
4095 | ||
8fc2b417 SG |
4096 | This function sets up an entry and/or exit trap for the specified system |
4097 | call. When the child executes the specified system call, your function | |
4098 | will be called with the call #, a flag that indicates entry or exit, and | |
4099 | pointers to rtnval and statval (which are used by procfs_wait). The | |
4100 | function should return non-zero if something interesting happened, zero | |
4101 | otherwise. | |
de43d7d0 SG |
4102 | */ |
4103 | ||
4104 | static void | |
8fc2b417 | 4105 | procfs_set_syscall_trap (pi, syscall_num, flags, func) |
de43d7d0 | 4106 | struct procinfo *pi; |
8fc2b417 SG |
4107 | int syscall_num; |
4108 | int flags; | |
4109 | syscall_func_t *func; | |
de43d7d0 | 4110 | { |
8fc2b417 | 4111 | sysset_t sysset; |
de43d7d0 | 4112 | |
8fc2b417 | 4113 | if (flags & PROCFS_SYSCALL_ENTRY) |
de43d7d0 | 4114 | { |
8fc2b417 SG |
4115 | if (ioctl (pi->fd, PIOCGENTRY, &sysset) < 0) |
4116 | { | |
4117 | print_sys_errmsg (pi->pathname, errno); | |
4118 | error ("PIOCGENTRY failed"); | |
4119 | } | |
4120 | ||
4121 | praddset (&sysset, syscall_num); | |
4122 | ||
4123 | if (ioctl (pi->fd, PIOCSENTRY, &sysset) < 0) | |
4124 | { | |
4125 | print_sys_errmsg (pi->pathname, errno); | |
4126 | error ("PIOCSENTRY failed"); | |
4127 | } | |
de43d7d0 SG |
4128 | } |
4129 | ||
8fc2b417 SG |
4130 | if (flags & PROCFS_SYSCALL_EXIT) |
4131 | { | |
4132 | if (ioctl (pi->fd, PIOCGEXIT, &sysset) < 0) | |
4133 | { | |
4134 | procfs_clear_syscall_trap (pi, syscall_num, 1); | |
4135 | print_sys_errmsg (pi->pathname, errno); | |
4136 | error ("PIOCGEXIT failed"); | |
4137 | } | |
de43d7d0 | 4138 | |
8fc2b417 | 4139 | praddset (&sysset, syscall_num); |
eca4a350 | 4140 | |
8fc2b417 SG |
4141 | if (ioctl (pi->fd, PIOCSEXIT, &sysset) < 0) |
4142 | { | |
4143 | procfs_clear_syscall_trap (pi, syscall_num, 1); | |
4144 | print_sys_errmsg (pi->pathname, errno); | |
4145 | error ("PIOCSEXIT failed"); | |
4146 | } | |
4147 | } | |
eca4a350 | 4148 | |
8fc2b417 | 4149 | if (!pi->syscall_handlers) |
de43d7d0 | 4150 | { |
8fc2b417 SG |
4151 | pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler)); |
4152 | pi->syscall_handlers[0].syscall_num = syscall_num; | |
4153 | pi->syscall_handlers[0].func = func; | |
4154 | pi->num_syscall_handlers = 1; | |
de43d7d0 | 4155 | } |
8fc2b417 SG |
4156 | else |
4157 | { | |
4158 | int i; | |
de43d7d0 | 4159 | |
8fc2b417 SG |
4160 | for (i = 0; i < pi->num_syscall_handlers; i++) |
4161 | if (pi->syscall_handlers[i].syscall_num == syscall_num) | |
4162 | { | |
4163 | pi->syscall_handlers[i].func = func; | |
4164 | return; | |
4165 | } | |
de43d7d0 | 4166 | |
8fc2b417 SG |
4167 | pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1) |
4168 | * sizeof (struct procfs_syscall_handler)); | |
4169 | pi->syscall_handlers[i].syscall_num = syscall_num; | |
4170 | pi->syscall_handlers[i].func = func; | |
4171 | pi->num_syscall_handlers++; | |
4172 | } | |
de43d7d0 | 4173 | } |
8fc2b417 SG |
4174 | |
4175 | #ifdef SYS_lwp_create | |
4176 | ||
4177 | /* | |
4178 | ||
4179 | LOCAL FUNCTION | |
4180 | ||
4181 | procfs_lwp_creation_handler - handle exit from the _lwp_create syscall | |
4182 | ||
4183 | SYNOPSIS | |
4184 | ||
4185 | int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
4186 | ||
4187 | DESCRIPTION | |
4188 | ||
4189 | This routine is called both when an inferior process and it's new lwp | |
4190 | are about to finish a _lwp_create() system call. This is the system | |
4191 | call that Solaris uses to create a lightweight process. When the | |
4192 | target process gets this event, we can look at sysarg[2] to find the | |
4193 | new childs lwp ID, and create a procinfo struct from that. After that, | |
4194 | we pretend that we got a SIGTRAP, and return non-zero to tell | |
4195 | procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up, | |
4196 | sees the new process and continues it. | |
4197 | ||
4198 | When we see the child exiting from lwp_create, we just contine it, | |
4199 | since everything was handled when the parent trapped. | |
4200 | ||
4201 | NOTES | |
4202 | In effect, we are only paying attention to the parent's completion of | |
4203 | the lwp_create syscall. If we only paid attention to the child | |
4204 | instead, then we wouldn't detect the creation of a suspended thread. | |
4205 | */ | |
4206 | ||
4207 | static int | |
4208 | procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp) | |
4209 | struct procinfo *pi; | |
4210 | int syscall_num; | |
4211 | int why; | |
4212 | int *rtnvalp; | |
4213 | int *statvalp; | |
4214 | { | |
4215 | int lwp_id; | |
4216 | struct procinfo *childpi; | |
4217 | ||
4218 | /* We've just detected the completion of an lwp_create system call. Now we | |
4219 | need to setup a procinfo struct for this thread, and notify the thread | |
4220 | system of the new arrival. */ | |
4221 | ||
4222 | /* If lwp_create failed, then nothing interesting happened. Continue the | |
4223 | process and go back to sleep. */ | |
4224 | ||
4225 | if (pi->prstatus.pr_reg[R_PSR] & PS_FLAG_CARRY) | |
4226 | { /* _lwp_create failed */ | |
4227 | pi->prrun.pr_flags &= PRSTEP; | |
4228 | pi->prrun.pr_flags |= PRCFAULT; | |
4229 | ||
4230 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) | |
4231 | perror_with_name (pi->pathname); | |
4232 | ||
4233 | return 0; | |
4234 | } | |
4235 | ||
4236 | /* At this point, the new thread is stopped at it's first instruction, and | |
4237 | the parent is stopped at the exit from lwp_create. */ | |
4238 | ||
4239 | if (pi->new_child) /* Child? */ | |
4240 | { /* Yes, just continue it */ | |
4241 | pi->prrun.pr_flags &= PRSTEP; | |
4242 | pi->prrun.pr_flags |= PRCFAULT; | |
4243 | ||
4244 | if ((pi->prstatus.pr_flags & PR_ISTOP) | |
4245 | && ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) | |
4246 | perror_with_name (pi->pathname); | |
4247 | ||
4248 | pi->new_child = 0; /* No longer new */ | |
4249 | ||
4250 | return 0; | |
4251 | } | |
4252 | ||
4253 | /* We're the proud parent of a new thread. Setup an exit trap for lwp_create | |
4254 | in the child and continue the parent. */ | |
4255 | ||
4256 | /* Third arg is pointer to new thread id. */ | |
4257 | lwp_id = read_memory_integer (pi->prstatus.pr_sysarg[2], sizeof (int)); | |
4258 | ||
4259 | lwp_id = (lwp_id << 16) | PIDGET (pi->pid); | |
4260 | ||
4261 | childpi = create_procinfo (lwp_id); | |
4262 | ||
4263 | /* The new process has actually inherited the lwp_create syscall trap from | |
4264 | it's parent, but we still have to call this to register a handler for | |
4265 | that child. */ | |
4266 | ||
4267 | procfs_set_syscall_trap (childpi, SYS_lwp_create, PROCFS_SYSCALL_EXIT, | |
4268 | procfs_lwp_creation_handler); | |
4269 | ||
4270 | childpi->new_child = 1; /* Flag this as an unseen child process */ | |
4271 | ||
4272 | *rtnvalp = lwp_id; /* the new arrival. */ | |
4273 | *statvalp = (SIGTRAP << 8) | 0177; | |
4274 | ||
4275 | return 1; | |
4276 | } | |
4277 | #endif /* SYS_lwp_create */ | |
de43d7d0 | 4278 | |
3fbdd536 JG |
4279 | /* Fork an inferior process, and start debugging it with /proc. */ |
4280 | ||
4281 | static void | |
4282 | procfs_create_inferior (exec_file, allargs, env) | |
4283 | char *exec_file; | |
4284 | char *allargs; | |
4285 | char **env; | |
4286 | { | |
08f74b92 JK |
4287 | char *shell_file = getenv ("SHELL"); |
4288 | char *tryname; | |
4289 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4290 | { | |
4291 | ||
4292 | /* We will be looking down the PATH to find shell_file. If we | |
4293 | just do this the normal way (via execlp, which operates by | |
4294 | attempting an exec for each element of the PATH until it | |
4295 | finds one which succeeds), then there will be an exec for | |
4296 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4297 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4298 | for these failed execs with the ones for successful execs | |
4299 | (whether the exec has succeeded is stored at that time in the | |
4300 | carry bit or some such architecture-specific and | |
4301 | non-ABI-specified place). | |
4302 | ||
4303 | So I can't think of anything better than to search the PATH | |
4304 | now. This has several disadvantages: (1) There is a race | |
4305 | condition; if we find a file now and it is deleted before we | |
4306 | exec it, we lose, even if the deletion leaves a valid file | |
4307 | further down in the PATH, (2) there is no way to know exactly | |
4308 | what an executable (in the sense of "capable of being | |
4309 | exec'd") file is. Using access() loses because it may lose | |
4310 | if the caller is the superuser; failing to use it loses if | |
4311 | there are ACLs or some such. */ | |
4312 | ||
4313 | char *p; | |
4314 | char *p1; | |
f93b941b JK |
4315 | /* FIXME-maybe: might want "set path" command so user can change what |
4316 | path is used from within GDB. */ | |
08f74b92 JK |
4317 | char *path = getenv ("PATH"); |
4318 | int len; | |
4319 | struct stat statbuf; | |
4320 | ||
4321 | if (path == NULL) | |
4322 | path = "/bin:/usr/bin"; | |
4323 | ||
4324 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
4325 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) | |
4326 | { | |
4327 | p1 = strchr (p, ':'); | |
4328 | if (p1 != NULL) | |
4329 | len = p1 - p; | |
4330 | else | |
4331 | len = strlen (p); | |
4332 | strncpy (tryname, p, len); | |
4333 | tryname[len] = '\0'; | |
4334 | strcat (tryname, "/"); | |
4335 | strcat (tryname, shell_file); | |
4336 | if (access (tryname, X_OK) < 0) | |
4337 | continue; | |
4338 | if (stat (tryname, &statbuf) < 0) | |
4339 | continue; | |
4340 | if (!S_ISREG (statbuf.st_mode)) | |
4341 | /* We certainly need to reject directories. I'm not quite | |
4342 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4343 | that people want to exec() these things. */ | |
4344 | continue; | |
4345 | break; | |
4346 | } | |
4347 | if (p == NULL) | |
4348 | /* Not found. This must be an error rather than merely passing | |
4349 | the file to execlp(), because execlp() would try all the | |
4350 | exec()s, causing GDB to get confused. */ | |
4351 | error ("Can't find shell %s in PATH", shell_file); | |
4352 | ||
4353 | shell_file = tryname; | |
4354 | } | |
4355 | ||
3fbdd536 | 4356 | fork_inferior (exec_file, allargs, env, |
08f74b92 JK |
4357 | proc_set_exec_trap, procfs_init_inferior, shell_file); |
4358 | ||
3fbdd536 JG |
4359 | /* We are at the first instruction we care about. */ |
4360 | /* Pedal to the metal... */ | |
de43d7d0 | 4361 | |
67ac9759 | 4362 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
3fbdd536 JG |
4363 | } |
4364 | ||
4365 | /* Clean up after the inferior dies. */ | |
4366 | ||
4367 | static void | |
4368 | procfs_mourn_inferior () | |
4369 | { | |
fb63d460 | 4370 | struct procinfo *pi; |
cd4104e0 | 4371 | struct procinfo *next_pi; |
fb63d460 | 4372 | |
cd4104e0 TL |
4373 | for (pi = procinfo_list; pi; pi = next_pi) |
4374 | { | |
4375 | next_pi = pi->next; | |
4376 | unconditionally_kill_inferior (pi); | |
4377 | } | |
fb63d460 | 4378 | |
3fbdd536 JG |
4379 | unpush_target (&procfs_ops); |
4380 | generic_mourn_inferior (); | |
4381 | } | |
4382 | ||
cd4104e0 | 4383 | |
3fbdd536 JG |
4384 | /* Mark our target-struct as eligible for stray "run" and "attach" commands. */ |
4385 | static int | |
4386 | procfs_can_run () | |
4387 | { | |
8fc2b417 SG |
4388 | /* This variable is controlled by modules that sit atop procfs that may layer |
4389 | their own process structure atop that provided here. sol-thread.c does | |
4390 | this because of the Solaris two-level thread model. */ | |
4391 | ||
4392 | return !procfs_suppress_run; | |
3fbdd536 | 4393 | } |
f5a8f1a6 | 4394 | #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS |
999dd04b JL |
4395 | \f |
4396 | /* Insert a watchpoint */ | |
4397 | int | |
4398 | procfs_set_watchpoint(pid, addr, len, rw) | |
4399 | int pid; | |
4400 | CORE_ADDR addr; | |
4401 | int len; | |
4402 | int rw; | |
4403 | { | |
4404 | struct procinfo *pi; | |
4405 | prwatch_t wpt; | |
4406 | ||
4407 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); | |
4408 | wpt.pr_vaddr = (caddr_t)addr; | |
4409 | wpt.pr_size = len; | |
4410 | wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0); | |
4411 | if (ioctl (pi->fd, PIOCSWATCH, &wpt) < 0) | |
4412 | { | |
4413 | if (errno == E2BIG) | |
4414 | return -1; | |
4415 | /* Currently it sometimes happens that the same watchpoint gets | |
4416 | deleted twice - don't die in this case (FIXME please) */ | |
4417 | if (errno == ESRCH && len == 0) | |
4418 | return 0; | |
4419 | print_sys_errmsg (pi->pathname, errno); | |
4420 | error ("PIOCSWATCH failed"); | |
4421 | } | |
4422 | return 0; | |
4423 | } | |
4424 | ||
4425 | int | |
4426 | procfs_stopped_by_watchpoint(pid) | |
4427 | int pid; | |
4428 | { | |
4429 | struct procinfo *pi; | |
4430 | short what; | |
4431 | short why; | |
4432 | ||
4433 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); | |
4434 | if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) | |
4435 | { | |
4436 | why = pi->prstatus.pr_why; | |
4437 | what = pi->prstatus.pr_what; | |
4438 | if (why == PR_FAULTED | |
6bc194d2 | 4439 | #if defined (FLTWATCH) && defined (FLTKWATCH) |
255181a9 | 4440 | && (what == FLTWATCH || what == FLTKWATCH) |
6bc194d2 JL |
4441 | #else |
4442 | #ifdef FLTWATCH | |
4443 | && (what == FLTWATCH) | |
4444 | #endif | |
4445 | #ifdef FLTKWATCH | |
4446 | && (what == FLTKWATCH) | |
4447 | #endif | |
72b8ca51 | 4448 | #endif |
6bc194d2 | 4449 | ) |
999dd04b JL |
4450 | return what; |
4451 | } | |
4452 | return 0; | |
4453 | } | |
6bc194d2 | 4454 | #endif |
999dd04b | 4455 | |
8fc2b417 SG |
4456 | /* Why is this necessary? Shouldn't dead threads just be removed from the |
4457 | thread database? */ | |
4458 | ||
9b33e492 | 4459 | static int |
8fc2b417 SG |
4460 | procfs_thread_alive (pid) |
4461 | int pid; | |
4462 | { | |
4463 | return 1; | |
4464 | } | |
4465 | ||
78b459a7 SG |
4466 | /* Send a SIGINT to the process group. This acts just like the user typed a |
4467 | ^C on the controlling terminal. | |
4468 | ||
4469 | XXX - This may not be correct for all systems. Some may want to use | |
4470 | killpg() instead of kill (-pgrp). */ | |
4471 | ||
9b33e492 | 4472 | static void |
2592eef8 | 4473 | procfs_stop () |
78b459a7 SG |
4474 | { |
4475 | extern pid_t inferior_process_group; | |
4476 | ||
4477 | kill (-inferior_process_group, SIGINT); | |
4478 | } | |
9b33e492 SG |
4479 | \f |
4480 | /* Convert a pid to printable form. */ | |
78b459a7 | 4481 | |
9b33e492 SG |
4482 | #ifdef TIDGET |
4483 | char * | |
4484 | procfs_pid_to_str (pid) | |
4485 | int pid; | |
4486 | { | |
4487 | static char buf[100]; | |
4488 | ||
4489 | sprintf (buf, "Kernel thread %d", TIDGET (pid)); | |
4490 | ||
4491 | return buf; | |
4492 | } | |
4493 | #endif /* TIDGET */ | |
3fbdd536 JG |
4494 | \f |
4495 | struct target_ops procfs_ops = { | |
4496 | "procfs", /* to_shortname */ | |
4497 | "Unix /proc child process", /* to_longname */ | |
4498 | "Unix /proc child process (started by the \"run\" command).", /* to_doc */ | |
4499 | procfs_open, /* to_open */ | |
4500 | 0, /* to_close */ | |
4501 | procfs_attach, /* to_attach */ | |
4502 | procfs_detach, /* to_detach */ | |
4503 | procfs_resume, /* to_resume */ | |
4504 | procfs_wait, /* to_wait */ | |
4505 | procfs_fetch_registers, /* to_fetch_registers */ | |
4506 | procfs_store_registers, /* to_store_registers */ | |
4507 | procfs_prepare_to_store, /* to_prepare_to_store */ | |
4508 | procfs_xfer_memory, /* to_xfer_memory */ | |
4509 | procfs_files_info, /* to_files_info */ | |
4510 | memory_insert_breakpoint, /* to_insert_breakpoint */ | |
4511 | memory_remove_breakpoint, /* to_remove_breakpoint */ | |
4512 | terminal_init_inferior, /* to_terminal_init */ | |
4513 | terminal_inferior, /* to_terminal_inferior */ | |
4514 | terminal_ours_for_output, /* to_terminal_ours_for_output */ | |
4515 | terminal_ours, /* to_terminal_ours */ | |
4516 | child_terminal_info, /* to_terminal_info */ | |
4517 | procfs_kill_inferior, /* to_kill */ | |
4518 | 0, /* to_load */ | |
4519 | 0, /* to_lookup_symbol */ | |
4520 | procfs_create_inferior, /* to_create_inferior */ | |
4521 | procfs_mourn_inferior, /* to_mourn_inferior */ | |
4522 | procfs_can_run, /* to_can_run */ | |
3950a34e | 4523 | procfs_notice_signals, /* to_notice_signals */ |
8fc2b417 | 4524 | procfs_thread_alive, /* to_thread_alive */ |
2592eef8 | 4525 | procfs_stop, /* to_stop */ |
3fbdd536 JG |
4526 | process_stratum, /* to_stratum */ |
4527 | 0, /* to_next */ | |
4528 | 1, /* to_has_all_memory */ | |
4529 | 1, /* to_has_memory */ | |
4530 | 1, /* to_has_stack */ | |
4531 | 1, /* to_has_registers */ | |
4532 | 1, /* to_has_execution */ | |
4533 | 0, /* sections */ | |
4534 | 0, /* sections_end */ | |
4535 | OPS_MAGIC /* to_magic */ | |
4536 | }; | |
4537 | ||
3fbdd536 JG |
4538 | void |
4539 | _initialize_procfs () | |
4540 | { | |
2592eef8 PS |
4541 | #ifdef HAVE_OPTIONAL_PROC_FS |
4542 | char procname[32]; | |
4543 | int fd; | |
4544 | ||
4545 | /* If we have an optional /proc filesystem (e.g. under OSF/1), | |
4546 | don't add procfs support if we cannot access the running | |
4547 | GDB via /proc. */ | |
4548 | sprintf (procname, PROC_NAME_FMT, getpid ()); | |
4549 | if ((fd = open (procname, O_RDONLY)) < 0) | |
4550 | return; | |
4551 | close (fd); | |
4552 | #endif | |
4553 | ||
3fbdd536 JG |
4554 | add_target (&procfs_ops); |
4555 | ||
4556 | add_info ("proc", info_proc, | |
cc221e76 FF |
4557 | "Show process status information using /proc entry.\n\ |
4558 | Specify process id or use current inferior by default.\n\ | |
4559 | Specify keywords for detailed information; default is summary.\n\ | |
4560 | Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\ | |
4561 | `status', `syscalls', and `times'.\n\ | |
3fbdd536 | 4562 | Unambiguous abbreviations may be used."); |
a39ad5ce | 4563 | |
cc221e76 | 4564 | init_syscall_table (); |
35f5886e | 4565 | } |