Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
c3f6f71d JM |
2 | Copyright 1999 Free Software Foundation, Inc. |
3 | Written by Michael Snyder at Cygnus Solutions. | |
4 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 5 | |
c3f6f71d | 6 | This file is part of GDB. |
c906108c | 7 | |
c3f6f71d JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c3f6f71d JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c3f6f71d JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software Foundation, | |
20 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
c906108c | 21 | |
c3f6f71d JM |
22 | #include "defs.h" |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "gdbcore.h" | |
26 | #include "gdbcmd.h" | |
0fda6bd2 | 27 | #include "gdbthread.h" |
c906108c | 28 | |
c3f6f71d JM |
29 | #if defined (NEW_PROC_API) |
30 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
31 | #endif | |
c906108c | 32 | |
c3f6f71d JM |
33 | #include <sys/procfs.h> |
34 | #include <sys/fault.h> | |
35 | #include <sys/syscall.h> | |
36 | #include <sys/errno.h> | |
0fda6bd2 JM |
37 | #include <sys/wait.h> |
38 | #include <signal.h> | |
39 | #include <ctype.h> | |
40 | ||
c3f6f71d JM |
41 | /* |
42 | * PROCFS.C | |
43 | * | |
44 | * This module provides the interface between GDB and the | |
45 | * /proc file system, which is used on many versions of Unix | |
46 | * as a means for debuggers to control other processes. | |
47 | * Examples of the systems that use this interface are: | |
48 | * Irix | |
49 | * Solaris | |
50 | * OSF | |
51 | * Unixware | |
52 | * | |
53 | * /proc works by immitating a file system: you open a simulated file | |
54 | * that represents the process you wish to interact with, and | |
55 | * perform operations on that "file" in order to examine or change | |
56 | * the state of the other process. | |
57 | * | |
58 | * The most important thing to know about /proc and this module | |
59 | * is that there are two very different interfaces to /proc: | |
60 | * One that uses the ioctl system call, and | |
61 | * another that uses read and write system calls. | |
62 | * This module has to support both /proc interfaces. This means | |
63 | * that there are two different ways of doing every basic operation. | |
64 | * | |
65 | * In order to keep most of the code simple and clean, I have | |
66 | * defined an interface "layer" which hides all these system calls. | |
67 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
68 | * and most or all occurrances of this ifdef should be confined to | |
69 | * this interface layer. | |
c906108c SS |
70 | */ |
71 | ||
72 | ||
c3f6f71d JM |
73 | /* Determine which /proc API we are using: |
74 | The ioctl API defines PIOCSTATUS, while | |
75 | the read/write (multiple fd) API never does. */ | |
c906108c | 76 | |
c3f6f71d | 77 | #ifdef NEW_PROC_API |
c906108c | 78 | #include <sys/types.h> |
c3f6f71d JM |
79 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
80 | #endif | |
c906108c | 81 | |
c3f6f71d JM |
82 | #include <fcntl.h> /* for O_RDONLY */ |
83 | #include <unistd.h> /* for "X_OK" */ | |
84 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 85 | |
103b3ef5 MS |
86 | /* Note: procfs-utils.h must be included after the above system header |
87 | files, because it redefines various system calls using macros. | |
88 | This may be incompatible with the prototype declarations. */ | |
89 | ||
103b3ef5 MS |
90 | #include "proc-utils.h" |
91 | ||
c3f6f71d | 92 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 93 | |
c3f6f71d JM |
94 | /* |
95 | * This module defines the GDB target vector and its methods. | |
96 | */ | |
c906108c | 97 | |
c3f6f71d JM |
98 | static void procfs_open PARAMS((char *, int)); |
99 | static void procfs_attach PARAMS ((char *, int)); | |
100 | static void procfs_detach PARAMS ((char *, int)); | |
101 | static void procfs_resume PARAMS ((int, int, enum target_signal)); | |
102 | static int procfs_can_run PARAMS ((void)); | |
103 | static void procfs_stop PARAMS ((void)); | |
104 | static void procfs_files_info PARAMS ((struct target_ops *)); | |
105 | static void procfs_fetch_registers PARAMS ((int)); | |
106 | static void procfs_store_registers PARAMS ((int)); | |
107 | static void procfs_notice_signals PARAMS ((int)); | |
108 | static void procfs_prepare_to_store PARAMS ((void)); | |
109 | static void procfs_kill_inferior PARAMS ((void)); | |
110 | static void procfs_mourn_inferior PARAMS ((void)); | |
111 | static void procfs_create_inferior PARAMS ((char *, char *, char **)); | |
112 | static int procfs_wait PARAMS ((int, | |
113 | struct target_waitstatus *)); | |
114 | static int procfs_xfer_memory PARAMS ((CORE_ADDR, | |
115 | char *, int, int, | |
116 | struct target_ops *)); | |
117 | ||
118 | static int procfs_thread_alive PARAMS ((int)); | |
119 | ||
120 | void procfs_find_new_threads PARAMS ((void)); | |
121 | char *procfs_pid_to_str PARAMS ((int)); | |
122 | ||
123 | struct target_ops procfs_ops; /* the target vector */ | |
c906108c | 124 | |
c3f6f71d JM |
125 | static void |
126 | init_procfs_ops () | |
127 | { | |
128 | procfs_ops.to_shortname = "procfs"; | |
129 | procfs_ops.to_longname = "Unix /proc child process"; | |
130 | procfs_ops.to_doc = | |
131 | "Unix /proc child process (started by the \"run\" command)."; | |
132 | procfs_ops.to_open = procfs_open; | |
133 | procfs_ops.to_can_run = procfs_can_run; | |
134 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
135 | procfs_ops.to_kill = procfs_kill_inferior; | |
136 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
137 | procfs_ops.to_attach = procfs_attach; | |
138 | procfs_ops.to_detach = procfs_detach; | |
139 | procfs_ops.to_wait = procfs_wait; | |
140 | procfs_ops.to_resume = procfs_resume; | |
141 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
142 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
143 | procfs_ops.to_store_registers = procfs_store_registers; | |
144 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
145 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
146 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
147 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
148 | procfs_ops.to_files_info = procfs_files_info; | |
149 | procfs_ops.to_stop = procfs_stop; | |
150 | ||
151 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
152 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
153 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
154 | procfs_ops.to_terminal_ours = terminal_ours; | |
155 | procfs_ops.to_terminal_info = child_terminal_info; | |
156 | ||
157 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
158 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
159 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
160 | ||
103b3ef5 MS |
161 | procfs_ops.to_has_all_memory = 1; |
162 | procfs_ops.to_has_memory = 1; | |
c3f6f71d JM |
163 | procfs_ops.to_has_execution = 1; |
164 | procfs_ops.to_has_stack = 1; | |
165 | procfs_ops.to_has_registers = 1; | |
166 | procfs_ops.to_stratum = process_stratum; | |
167 | procfs_ops.to_has_thread_control = tc_schedlock; | |
168 | procfs_ops.to_magic = OPS_MAGIC; | |
169 | } | |
c906108c | 170 | |
c3f6f71d JM |
171 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
172 | ||
c3f6f71d JM |
173 | /* |
174 | * World Unification: | |
175 | * | |
176 | * Put any typedefs, defines etc. here that are required for | |
177 | * the unification of code that handles different versions of /proc. | |
178 | */ | |
179 | ||
180 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
181 | #ifndef UNIXWARE | |
182 | enum { READ_WATCHFLAG = WA_READ, | |
183 | WRITE_WATCHFLAG = WA_WRITE, | |
184 | EXEC_WATCHFLAG = WA_EXEC, | |
185 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
186 | }; | |
187 | #endif | |
188 | #else /* Irix method for watchpoints */ | |
189 | enum { READ_WATCHFLAG = MA_READ, | |
190 | WRITE_WATCHFLAG = MA_WRITE, | |
191 | EXEC_WATCHFLAG = MA_EXEC, | |
192 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
193 | }; | |
194 | #endif | |
195 | ||
196 | ||
197 | ||
198 | ||
199 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
200 | ||
201 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
202 | ||
203 | /* The procinfo struct is a wrapper to hold all the state information | |
204 | concerning a /proc process. There should be exactly one procinfo | |
205 | for each process, and since GDB currently can debug only one | |
206 | process at a time, that means there should be only one procinfo. | |
207 | All of the LWP's of a process can be accessed indirectly thru the | |
208 | single process procinfo. | |
209 | ||
210 | However, against the day when GDB may debug more than one process, | |
211 | this data structure is kept in a list (which for now will hold no | |
212 | more than one member), and many functions will have a pointer to a | |
213 | procinfo as an argument. | |
214 | ||
215 | There will be a separate procinfo structure for use by the (not yet | |
216 | implemented) "info proc" command, so that we can print useful | |
217 | information about any random process without interfering with the | |
218 | inferior's procinfo information. */ | |
219 | ||
220 | #ifdef NEW_PROC_API | |
221 | /* format strings for /proc paths */ | |
222 | # ifndef CTL_PROC_NAME_FMT | |
223 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
224 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
225 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
226 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
227 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
228 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
229 | # endif | |
230 | /* the name of the proc status struct depends on the implementation */ | |
231 | typedef pstatus_t gdb_prstatus_t; | |
232 | typedef lwpstatus_t gdb_lwpstatus_t; | |
233 | #else /* ! NEW_PROC_API */ | |
234 | /* format strings for /proc paths */ | |
235 | # ifndef CTL_PROC_NAME_FMT | |
236 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
237 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
238 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
239 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
240 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
241 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
242 | # endif | |
c906108c | 243 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 244 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
245 | typedef prstatus_t gdb_lwpstatus_t; |
246 | #endif /* NEW_PROC_API */ | |
c906108c SS |
247 | |
248 | ||
249 | /* These #ifdefs are for sol2.x in particular. sol2.x has | |
250 | both a "gregset_t" and a "prgregset_t", which have | |
251 | similar uses but different layouts. sol2.x gdb tries to | |
252 | use prgregset_t (and prfpregset_t) everywhere. */ | |
253 | ||
254 | #ifdef GDB_GREGSET_TYPE | |
c3f6f71d | 255 | typedef GDB_GREGSET_TYPE gdb_gregset_t; |
c906108c | 256 | #else |
c3f6f71d | 257 | typedef gregset_t gdb_gregset_t; |
c906108c SS |
258 | #endif |
259 | ||
260 | #ifdef GDB_FPREGSET_TYPE | |
c3f6f71d | 261 | typedef GDB_FPREGSET_TYPE gdb_fpregset_t; |
c906108c | 262 | #else |
c3f6f71d | 263 | typedef fpregset_t gdb_fpregset_t; |
c906108c SS |
264 | #endif |
265 | ||
0d06e24b JM |
266 | /* Provide default composite pid manipulation macros for systems that |
267 | don't have threads. */ | |
c906108c | 268 | |
c3f6f71d | 269 | #ifndef PIDGET |
0d06e24b JM |
270 | #define PIDGET(PID) (PID) |
271 | #define TIDGET(PID) (PID) | |
eeefac92 AC |
272 | #endif |
273 | #ifndef MERGEPID | |
0d06e24b | 274 | #define MERGEPID(PID, TID) (PID) |
c906108c SS |
275 | #endif |
276 | ||
c3f6f71d JM |
277 | typedef struct procinfo { |
278 | struct procinfo *next; | |
279 | int pid; /* Process ID */ | |
280 | int tid; /* Thread/LWP id */ | |
c906108c | 281 | |
c3f6f71d JM |
282 | /* process state */ |
283 | int was_stopped; | |
284 | int ignore_next_sigstop; | |
c906108c | 285 | |
c3f6f71d JM |
286 | /* The following four fd fields may be identical, or may contain |
287 | several different fd's, depending on the version of /proc | |
288 | (old ioctl or new read/write). */ | |
c906108c | 289 | |
c3f6f71d JM |
290 | int ctl_fd; /* File descriptor for /proc control file */ |
291 | /* | |
292 | * The next three file descriptors are actually only needed in the | |
293 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
294 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
295 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
296 | * implementation) filling them with copies of the control fd. | |
297 | */ | |
298 | int status_fd; /* File descriptor for /proc status file */ | |
299 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 300 | |
c3f6f71d | 301 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 302 | |
c3f6f71d JM |
303 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
304 | sigset_t saved_sigset; /* Saved traced signal set */ | |
305 | sigset_t saved_sighold; /* Saved held signal set */ | |
306 | sysset_t saved_exitset; /* Saved traced system call exit set */ | |
307 | sysset_t saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 308 | |
c3f6f71d | 309 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 310 | |
c3f6f71d JM |
311 | #ifndef NEW_PROC_API |
312 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 313 | #endif |
c3f6f71d JM |
314 | |
315 | struct procinfo *thread_list; | |
c906108c | 316 | |
c3f6f71d JM |
317 | int status_valid : 1; |
318 | int gregs_valid : 1; | |
319 | int fpregs_valid : 1; | |
320 | int threads_valid: 1; | |
321 | } procinfo; | |
c906108c | 322 | |
c3f6f71d | 323 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 324 | |
c3f6f71d | 325 | /* Function prototypes for procinfo module: */ |
c906108c | 326 | |
c3f6f71d JM |
327 | static procinfo *find_procinfo_or_die PARAMS ((int pid, int tid)); |
328 | static procinfo *find_procinfo PARAMS ((int pid, int tid)); | |
329 | static procinfo *create_procinfo PARAMS ((int pid, int tid)); | |
330 | static void destroy_procinfo PARAMS ((procinfo *p)); | |
004527cb | 331 | static void do_destroy_procinfo_cleanup (void *); |
c3f6f71d JM |
332 | static void dead_procinfo PARAMS ((procinfo *p, |
333 | char *msg, int killp)); | |
334 | static int open_procinfo_files PARAMS ((procinfo *p, int which)); | |
335 | static void close_procinfo_files PARAMS ((procinfo *p)); | |
c906108c | 336 | |
c3f6f71d JM |
337 | /* The head of the procinfo list: */ |
338 | static procinfo * procinfo_list; | |
c906108c | 339 | |
c3f6f71d JM |
340 | /* |
341 | * Function: find_procinfo | |
342 | * | |
343 | * Search the procinfo list. | |
344 | * | |
345 | * Returns: pointer to procinfo, or NULL if not found. | |
346 | */ | |
c906108c | 347 | |
c3f6f71d JM |
348 | static procinfo * |
349 | find_procinfo (pid, tid) | |
350 | int pid; | |
351 | int tid; | |
c5aa993b | 352 | { |
c3f6f71d | 353 | procinfo *pi; |
c906108c | 354 | |
c3f6f71d JM |
355 | for (pi = procinfo_list; pi; pi = pi->next) |
356 | if (pi->pid == pid) | |
357 | break; | |
c906108c | 358 | |
c3f6f71d JM |
359 | if (pi) |
360 | if (tid) | |
361 | { | |
362 | /* Don't check threads_valid. If we're updating the | |
363 | thread_list, we want to find whatever threads are already | |
364 | here. This means that in general it is the caller's | |
365 | responsibility to check threads_valid and update before | |
366 | calling find_procinfo, if the caller wants to find a new | |
367 | thread. */ | |
368 | ||
369 | for (pi = pi->thread_list; pi; pi = pi->next) | |
370 | if (pi->tid == tid) | |
371 | break; | |
372 | } | |
c906108c | 373 | |
c3f6f71d JM |
374 | return pi; |
375 | } | |
c906108c | 376 | |
c3f6f71d JM |
377 | /* |
378 | * Function: find_procinfo_or_die | |
379 | * | |
380 | * Calls find_procinfo, but errors on failure. | |
381 | */ | |
c906108c | 382 | |
c3f6f71d JM |
383 | static procinfo * |
384 | find_procinfo_or_die (pid, tid) | |
385 | int pid; | |
386 | int tid; | |
387 | { | |
388 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 389 | |
c3f6f71d | 390 | if (pi == NULL) |
0fda6bd2 JM |
391 | { |
392 | if (tid) | |
393 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
394 | pid, tid); | |
395 | else | |
396 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
397 | } | |
c3f6f71d JM |
398 | return pi; |
399 | } | |
c906108c | 400 | |
c3f6f71d JM |
401 | /* |
402 | * Function: open_procinfo_files | |
403 | * | |
404 | * Open the file descriptor for the process or LWP. | |
405 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
406 | * the others are opened lazily as needed. | |
407 | * else (if not NEW_PROC_API), there is only one real | |
408 | * file descriptor, but we keep multiple copies of it so that | |
409 | * the code that uses them does not have to be #ifdef'd. | |
410 | * | |
411 | * Return: file descriptor, or zero for failure. | |
412 | */ | |
c906108c | 413 | |
c3f6f71d | 414 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 415 | |
c3f6f71d JM |
416 | static int |
417 | open_procinfo_files (pi, which) | |
418 | procinfo *pi; | |
419 | int which; | |
420 | { | |
0fda6bd2 | 421 | #ifdef NEW_PROC_API |
c3f6f71d | 422 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 423 | #endif |
c3f6f71d JM |
424 | int fd; |
425 | ||
426 | /* | |
427 | * This function is getting ALMOST long enough to break up into several. | |
428 | * Here is some rationale: | |
429 | * | |
430 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
431 | * There are several file descriptors that may need to be open | |
432 | * for any given process or LWP. The ones we're intereted in are: | |
433 | * - control (ctl) write-only change the state | |
434 | * - status (status) read-only query the state | |
435 | * - address space (as) read/write access memory | |
436 | * - map (map) read-only virtual addr map | |
437 | * Most of these are opened lazily as they are needed. | |
438 | * The pathnames for the 'files' for an LWP look slightly | |
439 | * different from those of a first-class process: | |
440 | * Pathnames for a process (<proc-id>): | |
441 | * /proc/<proc-id>/ctl | |
442 | * /proc/<proc-id>/status | |
443 | * /proc/<proc-id>/as | |
444 | * /proc/<proc-id>/map | |
445 | * Pathnames for an LWP (lwp-id): | |
446 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
447 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
448 | * An LWP has no map or address space file descriptor, since | |
449 | * the memory map and address space are shared by all LWPs. | |
450 | * | |
451 | * Everyone else (Solaris 2.5, Irix, OSF) | |
452 | * There is only one file descriptor for each process or LWP. | |
453 | * For convenience, we copy the same file descriptor into all | |
454 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
455 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
456 | * doesn't need any #ifdef's. | |
457 | * Pathname for all: | |
458 | * /proc/<proc-id> | |
459 | * | |
460 | * Solaris 2.5 LWP's: | |
461 | * Each LWP has an independent file descriptor, but these | |
462 | * are not obtained via the 'open' system call like the rest: | |
463 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
464 | * to the file descriptor of the parent process. | |
465 | * | |
466 | * OSF threads: | |
467 | * These do not even have their own independent file descriptor. | |
468 | * All operations are carried out on the file descriptor of the | |
469 | * parent process. Therefore we just call open again for each | |
470 | * thread, getting a new handle for the same 'file'. | |
471 | */ | |
472 | ||
473 | #ifdef NEW_PROC_API | |
474 | /* | |
475 | * In this case, there are several different file descriptors that | |
476 | * we might be asked to open. The control file descriptor will be | |
477 | * opened early, but the others will be opened lazily as they are | |
478 | * needed. | |
479 | */ | |
480 | ||
481 | strcpy (tmp, pi->pathname); | |
482 | switch (which) { /* which file descriptor to open? */ | |
483 | case FD_CTL: | |
484 | if (pi->tid) | |
485 | strcat (tmp, "/lwpctl"); | |
486 | else | |
487 | strcat (tmp, "/ctl"); | |
488 | fd = open (tmp, O_WRONLY); | |
489 | if (fd <= 0) | |
490 | return 0; /* fail */ | |
491 | pi->ctl_fd = fd; | |
492 | break; | |
493 | case FD_AS: | |
494 | if (pi->tid) | |
495 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
496 | strcat (tmp, "/as"); | |
497 | fd = open (tmp, O_RDWR); | |
498 | if (fd <= 0) | |
499 | return 0; /* fail */ | |
500 | pi->as_fd = fd; | |
501 | break; | |
502 | case FD_STATUS: | |
503 | if (pi->tid) | |
504 | strcat (tmp, "/lwpstatus"); | |
505 | else | |
506 | strcat (tmp, "/status"); | |
507 | fd = open (tmp, O_RDONLY); | |
508 | if (fd <= 0) | |
509 | return 0; /* fail */ | |
510 | pi->status_fd = fd; | |
511 | break; | |
512 | default: | |
513 | return 0; /* unknown file descriptor */ | |
514 | } | |
515 | #else /* not NEW_PROC_API */ | |
516 | /* | |
517 | * In this case, there is only one file descriptor for each procinfo | |
518 | * (ie. each process or LWP). In fact, only the file descriptor for | |
519 | * the process can actually be opened by an 'open' system call. | |
520 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
521 | * on the process's file descriptor. | |
522 | * | |
523 | * For convenience, we copy each procinfo's single file descriptor | |
524 | * into all of the fields occupied by the several file descriptors | |
525 | * of the NEW_PROC_API implementation. That way, the code that uses | |
526 | * them can be written without ifdefs. | |
527 | */ | |
528 | ||
529 | ||
530 | #ifdef PIOCTSTATUS /* OSF */ | |
531 | if ((fd = open (pi->pathname, O_RDWR)) == 0) /* Only one FD; just open it. */ | |
532 | return 0; | |
533 | #else /* Sol 2.5, Irix, other? */ | |
534 | if (pi->tid == 0) /* Master procinfo for the process */ | |
535 | { | |
536 | fd = open (pi->pathname, O_RDWR); | |
537 | if (fd <= 0) | |
538 | return 0; /* fail */ | |
539 | } | |
540 | else /* LWP thread procinfo */ | |
541 | { | |
542 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
543 | procinfo *process; | |
544 | int lwpid = pi->tid; | |
545 | ||
546 | /* Find the procinfo for the entire process. */ | |
547 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
548 | return 0; /* fail */ | |
549 | ||
550 | /* Now obtain the file descriptor for the LWP. */ | |
551 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
552 | return 0; /* fail */ | |
553 | #else /* Irix, other? */ | |
554 | return 0; /* Don't know how to open threads */ | |
555 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
556 | } | |
557 | #endif /* OSF PIOCTSTATUS */ | |
558 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
559 | #endif /* NEW_PROC_API */ | |
c906108c | 560 | |
c3f6f71d JM |
561 | return 1; /* success */ |
562 | } | |
c906108c | 563 | |
c3f6f71d JM |
564 | /* |
565 | * Function: create_procinfo | |
566 | * | |
567 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 568 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
569 | * |
570 | * Return: pointer to new procinfo struct. | |
571 | */ | |
c906108c | 572 | |
c3f6f71d JM |
573 | static procinfo * |
574 | create_procinfo (pid, tid) | |
575 | int pid; | |
576 | int tid; | |
577 | { | |
578 | procinfo *pi, *parent; | |
c906108c | 579 | |
0d06e24b | 580 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 581 | return pi; /* Already exists, nothing to do. */ |
c906108c | 582 | |
c3f6f71d JM |
583 | /* find parent before doing malloc, to save having to cleanup */ |
584 | if (tid != 0) | |
585 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
586 | create it if it | |
587 | doesn't exist yet? */ | |
c906108c | 588 | |
c3f6f71d JM |
589 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
590 | memset (pi, 0, sizeof (procinfo)); | |
591 | pi->pid = pid; | |
592 | pi->tid = tid; | |
c906108c | 593 | |
c3f6f71d JM |
594 | /* Chain into list. */ |
595 | if (tid == 0) | |
596 | { | |
597 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
598 | pi->next = procinfo_list; | |
599 | procinfo_list = pi; | |
600 | } | |
601 | else | |
602 | { | |
603 | #ifdef NEW_PROC_API | |
604 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
605 | #else | |
606 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
607 | #endif | |
608 | pi->next = parent->thread_list; | |
609 | parent->thread_list = pi; | |
610 | } | |
611 | return pi; | |
612 | } | |
c906108c | 613 | |
c3f6f71d JM |
614 | /* |
615 | * Function: close_procinfo_files | |
616 | * | |
617 | * Close all file descriptors associated with the procinfo | |
618 | */ | |
c906108c | 619 | |
c3f6f71d JM |
620 | static void |
621 | close_procinfo_files (pi) | |
622 | procinfo *pi; | |
623 | { | |
624 | if (pi->ctl_fd > 0) | |
625 | close (pi->ctl_fd); | |
626 | #ifdef NEW_PROC_API | |
627 | if (pi->as_fd > 0) | |
628 | close (pi->as_fd); | |
629 | if (pi->status_fd > 0) | |
630 | close (pi->status_fd); | |
631 | #endif | |
632 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
633 | } | |
c906108c | 634 | |
c3f6f71d JM |
635 | /* |
636 | * Function: destroy_procinfo | |
637 | * | |
638 | * Destructor function. Close, unlink and deallocate the object. | |
639 | */ | |
c906108c | 640 | |
c3f6f71d JM |
641 | static void |
642 | destroy_one_procinfo (list, pi) | |
643 | procinfo **list; | |
644 | procinfo *pi; | |
645 | { | |
646 | procinfo *ptr; | |
647 | ||
648 | /* Step one: unlink the procinfo from its list */ | |
649 | if (pi == *list) | |
650 | *list = pi->next; | |
651 | else | |
652 | for (ptr = *list; ptr; ptr = ptr->next) | |
653 | if (ptr->next == pi) | |
654 | { | |
655 | ptr->next = pi->next; | |
656 | break; | |
657 | } | |
7a292a7a | 658 | |
c3f6f71d JM |
659 | /* Step two: close any open file descriptors */ |
660 | close_procinfo_files (pi); | |
7a292a7a | 661 | |
c3f6f71d JM |
662 | /* Step three: free the memory. */ |
663 | free (pi); | |
664 | } | |
c906108c | 665 | |
c3f6f71d JM |
666 | static void |
667 | destroy_procinfo (pi) | |
668 | procinfo *pi; | |
669 | { | |
670 | procinfo *tmp; | |
c906108c | 671 | |
c3f6f71d JM |
672 | if (pi->tid != 0) /* destroy a thread procinfo */ |
673 | { | |
674 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
675 | destroy_one_procinfo (&tmp->thread_list, pi); | |
676 | } | |
677 | else /* destroy a process procinfo and all its threads */ | |
678 | { | |
679 | /* First destroy the children, if any; */ | |
680 | while (pi->thread_list != NULL) | |
681 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
682 | /* Then destroy the parent. Genocide!!! */ | |
683 | destroy_one_procinfo (&procinfo_list, pi); | |
684 | } | |
685 | } | |
c906108c | 686 | |
004527cb AC |
687 | static void |
688 | do_destroy_procinfo_cleanup (void *pi) | |
689 | { | |
690 | destroy_procinfo (pi); | |
691 | } | |
692 | ||
c3f6f71d | 693 | enum { NOKILL, KILL }; |
c906108c | 694 | |
c3f6f71d JM |
695 | /* |
696 | * Function: dead_procinfo | |
697 | * | |
698 | * To be called on a non_recoverable error for a procinfo. | |
699 | * Prints error messages, optionally sends a SIGKILL to the process, | |
700 | * then destroys the data structure. | |
701 | */ | |
c906108c | 702 | |
c3f6f71d JM |
703 | static void |
704 | dead_procinfo (pi, msg, kill_p) | |
705 | procinfo *pi; | |
706 | char *msg; | |
707 | int kill_p; | |
708 | { | |
709 | char procfile[80]; | |
c906108c | 710 | |
c3f6f71d JM |
711 | if (pi->pathname) |
712 | { | |
713 | print_sys_errmsg (pi->pathname, errno); | |
714 | } | |
715 | else | |
716 | { | |
717 | sprintf (procfile, "process %d", pi->pid); | |
718 | print_sys_errmsg (procfile, errno); | |
719 | } | |
720 | if (kill_p == KILL) | |
721 | kill (pi->pid, SIGKILL); | |
c906108c | 722 | |
c3f6f71d JM |
723 | destroy_procinfo (pi); |
724 | error (msg); | |
725 | } | |
c906108c | 726 | |
c3f6f71d | 727 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 728 | |
c3f6f71d | 729 | /* =================== /proc "MODULE" =================== */ |
c906108c | 730 | |
c3f6f71d JM |
731 | /* |
732 | * This "module" is the interface layer between the /proc system API | |
733 | * and the gdb target vector functions. This layer consists of | |
734 | * access functions that encapsulate each of the basic operations | |
735 | * that we need to use from the /proc API. | |
736 | * | |
737 | * The main motivation for this layer is to hide the fact that | |
738 | * there are two very different implementations of the /proc API. | |
739 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
740 | * functions, we do our best to hide them all in here. | |
741 | */ | |
c906108c | 742 | |
c3f6f71d JM |
743 | int proc_get_status PARAMS ((procinfo *pi)); |
744 | long proc_flags PARAMS ((procinfo *pi)); | |
745 | int proc_why PARAMS ((procinfo *pi)); | |
746 | int proc_what PARAMS ((procinfo *pi)); | |
747 | int proc_set_run_on_last_close PARAMS ((procinfo *pi)); | |
748 | int proc_unset_run_on_last_close PARAMS ((procinfo *pi)); | |
749 | int proc_set_inherit_on_fork PARAMS ((procinfo *pi)); | |
750 | int proc_unset_inherit_on_fork PARAMS ((procinfo *pi)); | |
751 | int proc_set_async PARAMS ((procinfo *pi)); | |
752 | int proc_unset_async PARAMS ((procinfo *pi)); | |
753 | int proc_stop_process PARAMS ((procinfo *pi)); | |
754 | int proc_trace_signal PARAMS ((procinfo *pi, int signo)); | |
755 | int proc_ignore_signal PARAMS ((procinfo *pi, int signo)); | |
756 | int proc_clear_current_fault PARAMS ((procinfo *pi)); | |
757 | int proc_set_current_signal PARAMS ((procinfo *pi, int signo)); | |
758 | int proc_clear_current_signal PARAMS ((procinfo *pi)); | |
759 | int proc_set_gregs PARAMS ((procinfo *pi)); | |
760 | int proc_set_fpregs PARAMS ((procinfo *pi)); | |
761 | int proc_wait_for_stop PARAMS ((procinfo *pi)); | |
762 | int proc_run_process PARAMS ((procinfo *pi, int step, int signo)); | |
763 | int proc_kill PARAMS ((procinfo *pi, int signo)); | |
764 | int proc_parent_pid PARAMS ((procinfo *pi)); | |
765 | int proc_get_nthreads PARAMS ((procinfo *pi)); | |
766 | int proc_get_current_thread PARAMS ((procinfo *pi)); | |
767 | int proc_set_held_signals PARAMS ((procinfo *pi, sigset_t *sighold)); | |
768 | int proc_set_traced_sysexit PARAMS ((procinfo *pi, sysset_t *sysset)); | |
769 | int proc_set_traced_sysentry PARAMS ((procinfo *pi, sysset_t *sysset)); | |
770 | int proc_set_traced_faults PARAMS ((procinfo *pi, fltset_t *fltset)); | |
771 | int proc_set_traced_signals PARAMS ((procinfo *pi, sigset_t *sigset)); | |
772 | ||
773 | int proc_update_threads PARAMS ((procinfo *pi)); | |
774 | int proc_iterate_over_threads PARAMS ((procinfo *pi, | |
775 | int (*func) PARAMS ((procinfo *, | |
776 | procinfo *, | |
777 | void *)), | |
778 | void *ptr)); | |
779 | ||
780 | gdb_gregset_t *proc_get_gregs PARAMS ((procinfo *pi)); | |
781 | gdb_fpregset_t *proc_get_fpregs PARAMS ((procinfo *pi)); | |
782 | sysset_t *proc_get_traced_sysexit PARAMS ((procinfo *pi, sysset_t *save)); | |
783 | sysset_t *proc_get_traced_sysentry PARAMS ((procinfo *pi, sysset_t *save)); | |
784 | fltset_t *proc_get_traced_faults PARAMS ((procinfo *pi, fltset_t *save)); | |
785 | sigset_t *proc_get_traced_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
786 | sigset_t *proc_get_held_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
787 | sigset_t *proc_get_pending_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
788 | struct sigaction *proc_get_signal_actions PARAMS ((procinfo *pi, | |
789 | struct sigaction *save)); | |
790 | ||
791 | void proc_warn PARAMS ((procinfo *pi, char *func, int line)); | |
792 | void proc_error PARAMS ((procinfo *pi, char *func, int line)); | |
c906108c | 793 | |
c3f6f71d JM |
794 | void |
795 | proc_warn (pi, func, line) | |
796 | procinfo *pi; | |
797 | char *func; | |
798 | int line; | |
799 | { | |
800 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
801 | print_sys_errmsg (errmsg, errno); | |
802 | } | |
c906108c | 803 | |
c3f6f71d JM |
804 | void |
805 | proc_error (pi, func, line) | |
806 | procinfo *pi; | |
807 | char *func; | |
808 | int line; | |
809 | { | |
810 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
811 | perror_with_name (errmsg); | |
812 | } | |
c906108c | 813 | |
c3f6f71d JM |
814 | /* |
815 | * Function: proc_get_status | |
816 | * | |
817 | * Updates the status struct in the procinfo. | |
818 | * There is a 'valid' flag, to let other functions know when | |
819 | * this function needs to be called (so the status is only | |
820 | * read when it is needed). The status file descriptor is | |
821 | * also only opened when it is needed. | |
822 | * | |
823 | * Return: non-zero for success, zero for failure. | |
824 | */ | |
c906108c | 825 | |
c3f6f71d JM |
826 | int |
827 | proc_get_status (pi) | |
828 | procinfo *pi; | |
829 | { | |
830 | /* Status file descriptor is opened "lazily" */ | |
831 | if (pi->status_fd == 0 && | |
832 | open_procinfo_files (pi, FD_STATUS) == 0) | |
833 | { | |
834 | pi->status_valid = 0; | |
835 | return 0; | |
836 | } | |
c906108c | 837 | |
c3f6f71d JM |
838 | #ifdef NEW_PROC_API |
839 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
840 | pi->status_valid = 0; /* fail */ | |
841 | else | |
842 | { | |
843 | /* Sigh... I have to read a different data structure, | |
844 | depending on whether this is a main process or an LWP. */ | |
845 | if (pi->tid) | |
846 | pi->status_valid = (read (pi->status_fd, | |
847 | (char *) &pi->prstatus.pr_lwp, | |
848 | sizeof (lwpstatus_t)) | |
849 | == sizeof (lwpstatus_t)); | |
850 | else | |
851 | { | |
852 | pi->status_valid = (read (pi->status_fd, | |
853 | (char *) &pi->prstatus, | |
854 | sizeof (gdb_prstatus_t)) | |
855 | == sizeof (gdb_prstatus_t)); | |
856 | #if 0 /*def UNIXWARE*/ | |
857 | if (pi->status_valid && | |
858 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
859 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
860 | /* Unixware peculiarity -- read the damn thing again! */ | |
861 | pi->status_valid = (read (pi->status_fd, | |
862 | (char *) &pi->prstatus, | |
863 | sizeof (gdb_prstatus_t)) | |
864 | == sizeof (gdb_prstatus_t)); | |
865 | #endif /* UNIXWARE */ | |
866 | } | |
867 | } | |
868 | #else /* ioctl method */ | |
869 | #ifdef PIOCTSTATUS /* osf */ | |
870 | if (pi->tid == 0) /* main process */ | |
871 | { | |
872 | /* Just read the danged status. Now isn't that simple? */ | |
873 | pi->status_valid = | |
874 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
875 | } | |
876 | else | |
877 | { | |
878 | int win; | |
879 | struct { | |
880 | long pr_count; | |
881 | tid_t pr_error_thread; | |
882 | struct prstatus status; | |
883 | } thread_status; | |
884 | ||
885 | thread_status.pr_count = 1; | |
886 | thread_status.status.pr_tid = pi->tid; | |
887 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
888 | if (win) | |
889 | { | |
890 | memcpy (&pi->prstatus, &thread_status.status, | |
891 | sizeof (pi->prstatus)); | |
892 | pi->status_valid = 1; | |
893 | } | |
894 | } | |
895 | #else | |
896 | /* Just read the danged status. Now isn't that simple? */ | |
897 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
898 | #endif | |
899 | #endif | |
c906108c | 900 | |
c3f6f71d JM |
901 | if (pi->status_valid) |
902 | { | |
903 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
904 | proc_why (pi), | |
905 | proc_what (pi), | |
906 | proc_get_current_thread (pi)); | |
907 | } | |
c906108c | 908 | |
c3f6f71d JM |
909 | /* The status struct includes general regs, so mark them valid too */ |
910 | pi->gregs_valid = pi->status_valid; | |
911 | #ifdef NEW_PROC_API | |
912 | /* In the read/write multiple-fd model, | |
913 | the status struct includes the fp regs too, so mark them valid too */ | |
914 | pi->fpregs_valid = pi->status_valid; | |
915 | #endif | |
916 | return pi->status_valid; /* True if success, false if failure. */ | |
917 | } | |
c906108c | 918 | |
c3f6f71d JM |
919 | /* |
920 | * Function: proc_flags | |
921 | * | |
922 | * returns the process flags (pr_flags field). | |
923 | */ | |
924 | ||
925 | long | |
926 | proc_flags (pi) | |
927 | procinfo *pi; | |
928 | { | |
929 | if (!pi->status_valid) | |
930 | if (!proc_get_status (pi)) | |
931 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 932 | |
c3f6f71d | 933 | #ifdef NEW_PROC_API |
0d06e24b JM |
934 | # ifdef UNIXWARE |
935 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
936 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
937 | The two sets of flags don't overlap. */ | |
938 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
939 | # else | |
c3f6f71d | 940 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 941 | # endif |
c3f6f71d JM |
942 | #else |
943 | return pi->prstatus.pr_flags; | |
944 | #endif | |
945 | } | |
c906108c | 946 | |
c3f6f71d JM |
947 | /* |
948 | * Function: proc_why | |
949 | * | |
950 | * returns the pr_why field (why the process stopped). | |
951 | */ | |
c906108c | 952 | |
c3f6f71d JM |
953 | int |
954 | proc_why (pi) | |
955 | procinfo *pi; | |
956 | { | |
957 | if (!pi->status_valid) | |
958 | if (!proc_get_status (pi)) | |
959 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 960 | |
c3f6f71d JM |
961 | #ifdef NEW_PROC_API |
962 | return pi->prstatus.pr_lwp.pr_why; | |
963 | #else | |
964 | return pi->prstatus.pr_why; | |
965 | #endif | |
966 | } | |
c906108c | 967 | |
c3f6f71d JM |
968 | /* |
969 | * Function: proc_what | |
970 | * | |
971 | * returns the pr_what field (details of why the process stopped). | |
972 | */ | |
c906108c | 973 | |
c3f6f71d JM |
974 | int |
975 | proc_what (pi) | |
976 | procinfo *pi; | |
977 | { | |
978 | if (!pi->status_valid) | |
979 | if (!proc_get_status (pi)) | |
980 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 981 | |
c3f6f71d JM |
982 | #ifdef NEW_PROC_API |
983 | return pi->prstatus.pr_lwp.pr_what; | |
984 | #else | |
985 | return pi->prstatus.pr_what; | |
c906108c | 986 | #endif |
c3f6f71d | 987 | } |
c906108c | 988 | |
c3f6f71d JM |
989 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
990 | /* | |
991 | * Function: proc_nsysarg | |
992 | * | |
993 | * returns the pr_nsysarg field (number of args to the current syscall). | |
994 | */ | |
995 | ||
996 | int | |
997 | proc_nsysarg (pi) | |
998 | procinfo *pi; | |
999 | { | |
1000 | if (!pi->status_valid) | |
1001 | if (!proc_get_status (pi)) | |
1002 | return 0; | |
1003 | ||
1004 | #ifdef NEW_PROC_API | |
1005 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1006 | #else | |
1007 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1008 | #endif |
c3f6f71d | 1009 | } |
c906108c | 1010 | |
c3f6f71d JM |
1011 | /* |
1012 | * Function: proc_sysargs | |
1013 | * | |
1014 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1015 | */ | |
c906108c | 1016 | |
c3f6f71d JM |
1017 | long * |
1018 | proc_sysargs (pi) | |
1019 | procinfo *pi; | |
1020 | { | |
1021 | if (!pi->status_valid) | |
1022 | if (!proc_get_status (pi)) | |
1023 | return NULL; | |
1024 | ||
1025 | #ifdef NEW_PROC_API | |
1026 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1027 | #else | |
1028 | return (long *) &pi->prstatus.pr_sysarg; | |
1029 | #endif | |
1030 | } | |
c906108c | 1031 | |
c3f6f71d JM |
1032 | /* |
1033 | * Function: proc_syscall | |
1034 | * | |
1035 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1036 | */ | |
c906108c | 1037 | |
c3f6f71d JM |
1038 | int |
1039 | proc_syscall (pi) | |
1040 | procinfo *pi; | |
1041 | { | |
1042 | if (!pi->status_valid) | |
1043 | if (!proc_get_status (pi)) | |
1044 | return 0; | |
1045 | ||
1046 | #ifdef NEW_PROC_API | |
1047 | return pi->prstatus.pr_lwp.pr_syscall; | |
1048 | #else | |
1049 | return pi->prstatus.pr_syscall; | |
1050 | #endif | |
1051 | } | |
1052 | #endif /* PIOCSSPCACT */ | |
c906108c | 1053 | |
c3f6f71d JM |
1054 | /* |
1055 | * Function: proc_cursig: | |
1056 | * | |
1057 | * returns the pr_cursig field (current signal). | |
1058 | */ | |
c906108c | 1059 | |
c3f6f71d JM |
1060 | long |
1061 | proc_cursig (struct procinfo *pi) | |
1062 | { | |
1063 | if (!pi->status_valid) | |
1064 | if (!proc_get_status (pi)) | |
1065 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1066 | |
c3f6f71d JM |
1067 | #ifdef NEW_PROC_API |
1068 | return pi->prstatus.pr_lwp.pr_cursig; | |
1069 | #else | |
1070 | return pi->prstatus.pr_cursig; | |
1071 | #endif | |
1072 | } | |
c906108c | 1073 | |
c3f6f71d | 1074 | /* |
0d06e24b | 1075 | * Function: proc_modify_flag |
c3f6f71d JM |
1076 | * |
1077 | * === I appologize for the messiness of this function. | |
1078 | * === This is an area where the different versions of | |
1079 | * === /proc are more inconsistent than usual. MVS | |
1080 | * | |
1081 | * Set or reset any of the following process flags: | |
1082 | * PR_FORK -- forked child will inherit trace flags | |
1083 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1084 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1085 | * PR_ASYNC -- LWP's get to run/stop independently. |
1086 | * | |
1087 | * There are three methods for doing this function: | |
1088 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1089 | * [Sol6, Sol7, UW] | |
1090 | * 2) Middle: PIOCSET/PIOCRESET | |
1091 | * [Irix, Sol5] | |
1092 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1093 | * [OSF, Sol5] | |
1094 | * | |
1095 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1096 | * Note: OSF does not define PR_KLC. |
1097 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1098 | * |
1099 | * Arguments: | |
1100 | * pi -- the procinfo | |
1101 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1102 | * mode -- 1 for set, 0 for reset. | |
1103 | * | |
1104 | * Returns non-zero for success, zero for failure. | |
1105 | */ | |
c906108c | 1106 | |
c3f6f71d | 1107 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1108 | |
c3f6f71d JM |
1109 | static int |
1110 | proc_modify_flag (pi, flag, mode) | |
1111 | procinfo *pi; | |
1112 | long flag; | |
1113 | long mode; | |
1114 | { | |
1115 | long win = 0; /* default to fail */ | |
1116 | ||
1117 | /* | |
1118 | * These operations affect the process as a whole, and applying | |
1119 | * them to an individual LWP has the same meaning as applying them | |
1120 | * to the main process. Therefore, if we're ever called with a | |
1121 | * pointer to an LWP's procinfo, let's substitute the process's | |
1122 | * procinfo and avoid opening the LWP's file descriptor | |
1123 | * unnecessarily. | |
1124 | */ | |
1125 | ||
1126 | if (pi->pid != 0) | |
1127 | pi = find_procinfo_or_die (pi->pid, 0); | |
1128 | ||
1129 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1130 | /* First normalize the PCUNSET/PCRESET command opcode | |
1131 | (which for no obvious reason has a different definition | |
1132 | from one operating system to the next...) */ | |
1133 | #ifdef PCUNSET | |
1134 | #define GDBRESET PCUNSET | |
1135 | #endif | |
1136 | #ifdef PCRESET | |
1137 | #define GDBRESET PCRESET | |
c906108c | 1138 | #endif |
c3f6f71d JM |
1139 | { |
1140 | long arg[2]; | |
c906108c | 1141 | |
c3f6f71d JM |
1142 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1143 | arg[0] = PCSET; | |
1144 | else /* Reset the flag */ | |
1145 | arg[0] = GDBRESET; | |
c5aa993b | 1146 | |
c3f6f71d JM |
1147 | arg[1] = flag; |
1148 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1149 | } | |
1150 | #else | |
1151 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1152 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1153 | { | |
1154 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1155 | } | |
1156 | else /* Reset the flag */ | |
1157 | { | |
1158 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1159 | } | |
c906108c | 1160 | |
c3f6f71d JM |
1161 | #else |
1162 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1163 | switch (flag) { | |
1164 | case PR_RLC: | |
1165 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1166 | { | |
1167 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1168 | } | |
1169 | else /* Clear run-on-last-close */ | |
1170 | { | |
1171 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1172 | } | |
1173 | break; | |
1174 | case PR_FORK: | |
1175 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1176 | { | |
1177 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1178 | } | |
1179 | else /* Clear inherit-on-fork */ | |
1180 | { | |
1181 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1182 | } | |
1183 | break; | |
1184 | default: | |
1185 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1186 | break; | |
1187 | } | |
1188 | #endif | |
1189 | #endif | |
1190 | #endif | |
1191 | #undef GDBRESET | |
1192 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1193 | pi->status_valid = 0; | |
c906108c | 1194 | |
c3f6f71d JM |
1195 | if (!win) |
1196 | warning ("procfs: modify_flag failed to turn %s %s", | |
1197 | flag == PR_FORK ? "PR_FORK" : | |
1198 | flag == PR_RLC ? "PR_RLC" : | |
1199 | #ifdef PR_ASYNC | |
1200 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1201 | #endif |
1202 | #ifdef PR_KLC | |
1203 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1204 | #endif |
1205 | "<unknown flag>", | |
1206 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1207 | |
c3f6f71d JM |
1208 | return win; |
1209 | } | |
c906108c | 1210 | |
c3f6f71d JM |
1211 | /* |
1212 | * Function: proc_set_run_on_last_close | |
1213 | * | |
1214 | * Set the run_on_last_close flag. | |
1215 | * Process with all threads will become runnable | |
1216 | * when debugger closes all /proc fds. | |
1217 | * | |
1218 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1219 | */ |
1220 | ||
c3f6f71d JM |
1221 | int |
1222 | proc_set_run_on_last_close (pi) | |
1223 | procinfo *pi; | |
c906108c | 1224 | { |
c3f6f71d JM |
1225 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1226 | } | |
c906108c | 1227 | |
c3f6f71d JM |
1228 | /* |
1229 | * Function: proc_unset_run_on_last_close | |
1230 | * | |
1231 | * Reset the run_on_last_close flag. | |
1232 | * Process will NOT become runnable | |
1233 | * when debugger closes its file handles. | |
1234 | * | |
1235 | * Returns non-zero for success, zero for failure. | |
1236 | */ | |
c906108c | 1237 | |
c3f6f71d JM |
1238 | int |
1239 | proc_unset_run_on_last_close (pi) | |
1240 | procinfo *pi; | |
1241 | { | |
1242 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1243 | } |
1244 | ||
0d06e24b JM |
1245 | #ifdef PR_KLC |
1246 | /* | |
1247 | * Function: proc_set_kill_on_last_close | |
1248 | * | |
1249 | * Set the kill_on_last_close flag. | |
1250 | * Process with all threads will be killed when debugger | |
1251 | * closes all /proc fds (or debugger exits or dies). | |
1252 | * | |
1253 | * Returns non-zero for success, zero for failure. | |
1254 | */ | |
1255 | ||
1256 | int | |
1257 | proc_set_kill_on_last_close (pi) | |
1258 | procinfo *pi; | |
1259 | { | |
1260 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | * Function: proc_unset_kill_on_last_close | |
1265 | * | |
1266 | * Reset the kill_on_last_close flag. | |
1267 | * Process will NOT be killed when debugger | |
1268 | * closes its file handles (or exits or dies). | |
1269 | * | |
1270 | * Returns non-zero for success, zero for failure. | |
1271 | */ | |
1272 | ||
1273 | int | |
1274 | proc_unset_kill_on_last_close (pi) | |
1275 | procinfo *pi; | |
1276 | { | |
1277 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1278 | } | |
1279 | #endif /* PR_KLC */ | |
1280 | ||
c906108c | 1281 | /* |
c3f6f71d JM |
1282 | * Function: proc_set_inherit_on_fork |
1283 | * | |
1284 | * Set inherit_on_fork flag. | |
1285 | * If the process forks a child while we are registered for events | |
1286 | * in the parent, then we will also recieve events from the child. | |
1287 | * | |
1288 | * Returns non-zero for success, zero for failure. | |
1289 | */ | |
c906108c | 1290 | |
c3f6f71d JM |
1291 | int |
1292 | proc_set_inherit_on_fork (pi) | |
1293 | procinfo *pi; | |
1294 | { | |
1295 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1296 | } | |
c5aa993b | 1297 | |
c3f6f71d JM |
1298 | /* |
1299 | * Function: proc_unset_inherit_on_fork | |
1300 | * | |
1301 | * Reset inherit_on_fork flag. | |
1302 | * If the process forks a child while we are registered for events | |
1303 | * in the parent, then we will NOT recieve events from the child. | |
1304 | * | |
1305 | * Returns non-zero for success, zero for failure. | |
1306 | */ | |
c906108c | 1307 | |
c3f6f71d JM |
1308 | int |
1309 | proc_unset_inherit_on_fork (pi) | |
1310 | procinfo *pi; | |
1311 | { | |
1312 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1313 | } | |
c906108c | 1314 | |
c3f6f71d JM |
1315 | #ifdef PR_ASYNC |
1316 | /* | |
1317 | * Function: proc_set_async | |
1318 | * | |
1319 | * Set PR_ASYNC flag. | |
1320 | * If one LWP stops because of a debug event (signal etc.), | |
1321 | * the remaining LWPs will continue to run. | |
1322 | * | |
1323 | * Returns non-zero for success, zero for failure. | |
1324 | */ | |
c906108c | 1325 | |
c3f6f71d JM |
1326 | int |
1327 | proc_set_async (pi) | |
1328 | procinfo *pi; | |
1329 | { | |
1330 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1331 | } | |
c906108c | 1332 | |
c3f6f71d JM |
1333 | /* |
1334 | * Function: proc_unset_async | |
1335 | * | |
1336 | * Reset PR_ASYNC flag. | |
1337 | * If one LWP stops because of a debug event (signal etc.), | |
1338 | * then all other LWPs will stop as well. | |
1339 | * | |
1340 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1341 | */ |
1342 | ||
c3f6f71d JM |
1343 | int |
1344 | proc_unset_async (pi) | |
1345 | procinfo *pi; | |
1346 | { | |
1347 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1348 | } | |
1349 | #endif /* PR_ASYNC */ | |
c906108c SS |
1350 | |
1351 | /* | |
c3f6f71d JM |
1352 | * Function: proc_stop_process |
1353 | * | |
1354 | * Request the process/LWP to stop. Does not wait. | |
1355 | * Returns non-zero for success, zero for failure. | |
1356 | */ | |
c906108c | 1357 | |
c3f6f71d JM |
1358 | int |
1359 | proc_stop_process (pi) | |
1360 | procinfo *pi; | |
1361 | { | |
1362 | int win; | |
c906108c | 1363 | |
c3f6f71d JM |
1364 | /* |
1365 | * We might conceivably apply this operation to an LWP, and | |
1366 | * the LWP's ctl file descriptor might not be open. | |
1367 | */ | |
c906108c | 1368 | |
c3f6f71d JM |
1369 | if (pi->ctl_fd == 0 && |
1370 | open_procinfo_files (pi, FD_CTL) == 0) | |
1371 | return 0; | |
1372 | else | |
1373 | { | |
1374 | #ifdef NEW_PROC_API | |
6c1a54b2 | 1375 | long cmd = PCSTOP; |
c3f6f71d JM |
1376 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1377 | #else /* ioctl method */ | |
1378 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1379 | /* Note: the call also reads the prstatus. */ | |
1380 | if (win) | |
1381 | { | |
1382 | pi->status_valid = 1; | |
1383 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1384 | proc_why (pi), | |
1385 | proc_what (pi), | |
1386 | proc_get_current_thread (pi)); | |
1387 | } | |
1388 | #endif | |
1389 | } | |
c906108c | 1390 | |
c3f6f71d JM |
1391 | return win; |
1392 | } | |
c5aa993b | 1393 | |
c3f6f71d JM |
1394 | /* |
1395 | * Function: proc_wait_for_stop | |
1396 | * | |
1397 | * Wait for the process or LWP to stop (block until it does). | |
1398 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1399 | */ |
1400 | ||
c3f6f71d JM |
1401 | int |
1402 | proc_wait_for_stop (pi) | |
1403 | procinfo *pi; | |
c906108c | 1404 | { |
c3f6f71d JM |
1405 | int win; |
1406 | ||
1407 | /* | |
1408 | * We should never have to apply this operation to any procinfo | |
1409 | * except the one for the main process. If that ever changes | |
1410 | * for any reason, then take out the following clause and | |
1411 | * replace it with one that makes sure the ctl_fd is open. | |
1412 | */ | |
1413 | ||
1414 | if (pi->tid != 0) | |
1415 | pi = find_procinfo_or_die (pi->pid, 0); | |
1416 | ||
1417 | #ifdef NEW_PROC_API | |
1418 | { | |
6c1a54b2 | 1419 | long cmd = PCWSTOP; |
c3f6f71d JM |
1420 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1421 | /* We been runnin' and we stopped -- need to update status. */ | |
1422 | pi->status_valid = 0; | |
1423 | } | |
1424 | #else /* ioctl method */ | |
1425 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1426 | /* Above call also refreshes the prstatus. */ | |
1427 | if (win) | |
1428 | { | |
1429 | pi->status_valid = 1; | |
1430 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1431 | proc_why (pi), | |
1432 | proc_what (pi), | |
1433 | proc_get_current_thread (pi)); | |
1434 | } | |
c906108c SS |
1435 | #endif |
1436 | ||
c3f6f71d | 1437 | return win; |
c906108c SS |
1438 | } |
1439 | ||
1440 | /* | |
c3f6f71d JM |
1441 | * Function: proc_run_process |
1442 | * | |
1443 | * Make the process or LWP runnable. | |
1444 | * Options (not all are implemented): | |
1445 | * - single-step | |
1446 | * - clear current fault | |
1447 | * - clear current signal | |
1448 | * - abort the current system call | |
1449 | * - stop as soon as finished with system call | |
1450 | * - (ioctl): set traced signal set | |
1451 | * - (ioctl): set held signal set | |
1452 | * - (ioctl): set traced fault set | |
1453 | * - (ioctl): set start pc (vaddr) | |
1454 | * Always clear the current fault. | |
1455 | * Clear the current signal if 'signo' is zero. | |
1456 | * | |
1457 | * Arguments: | |
1458 | * pi the process or LWP to operate on. | |
1459 | * step if true, set the process or LWP to trap after one instr. | |
1460 | * signo if zero, clear the current signal if any. | |
1461 | * if non-zero, set the current signal to this one. | |
1462 | * | |
1463 | * Returns non-zero for success, zero for failure. | |
1464 | */ | |
1465 | ||
1466 | int | |
1467 | proc_run_process (pi, step, signo) | |
1468 | procinfo *pi; | |
1469 | int step; | |
1470 | int signo; | |
1471 | { | |
1472 | int win; | |
1473 | int runflags; | |
1474 | ||
1475 | /* | |
1476 | * We will probably have to apply this operation to individual threads, | |
1477 | * so make sure the control file descriptor is open. | |
1478 | */ | |
1479 | ||
1480 | if (pi->ctl_fd == 0 && | |
1481 | open_procinfo_files (pi, FD_CTL) == 0) | |
1482 | { | |
1483 | return 0; | |
1484 | } | |
c906108c | 1485 | |
c3f6f71d JM |
1486 | runflags = PRCFAULT; /* always clear current fault */ |
1487 | if (step) | |
1488 | runflags |= PRSTEP; | |
1489 | if (signo == 0) | |
1490 | runflags |= PRCSIG; | |
1491 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1492 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1493 | |
c3f6f71d JM |
1494 | #ifdef NEW_PROC_API |
1495 | { | |
6c1a54b2 | 1496 | long cmd[2]; |
c906108c | 1497 | |
c3f6f71d JM |
1498 | cmd[0] = PCRUN; |
1499 | cmd[1] = runflags; | |
1500 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1501 | } | |
1502 | #else /* ioctl method */ | |
1503 | { | |
1504 | prrun_t prrun; | |
c906108c | 1505 | |
c3f6f71d JM |
1506 | memset (&prrun, 0, sizeof (prrun)); |
1507 | prrun.pr_flags = runflags; | |
1508 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1509 | } | |
1510 | #endif | |
c906108c | 1511 | |
c3f6f71d JM |
1512 | return win; |
1513 | } | |
c906108c | 1514 | |
c3f6f71d JM |
1515 | /* |
1516 | * Function: proc_set_traced_signals | |
1517 | * | |
1518 | * Register to trace signals in the process or LWP. | |
1519 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1520 | */ |
1521 | ||
c3f6f71d JM |
1522 | int |
1523 | proc_set_traced_signals (pi, sigset) | |
1524 | procinfo *pi; | |
1525 | sigset_t *sigset; | |
c906108c | 1526 | { |
c3f6f71d JM |
1527 | int win; |
1528 | ||
1529 | /* | |
1530 | * We should never have to apply this operation to any procinfo | |
1531 | * except the one for the main process. If that ever changes | |
1532 | * for any reason, then take out the following clause and | |
1533 | * replace it with one that makes sure the ctl_fd is open. | |
1534 | */ | |
1535 | ||
1536 | if (pi->tid != 0) | |
1537 | pi = find_procinfo_or_die (pi->pid, 0); | |
1538 | ||
1539 | #ifdef NEW_PROC_API | |
1540 | { | |
1541 | struct { | |
6c1a54b2 | 1542 | long cmd; |
c3f6f71d JM |
1543 | /* Use char array to avoid alignment issues. */ |
1544 | char sigset[sizeof (sigset_t)]; | |
1545 | } arg; | |
c906108c | 1546 | |
c3f6f71d JM |
1547 | arg.cmd = PCSTRACE; |
1548 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
c906108c | 1549 | |
c3f6f71d JM |
1550 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1551 | } | |
1552 | #else /* ioctl method */ | |
1553 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1554 | #endif | |
1555 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1556 | pi->status_valid = 0; | |
c906108c | 1557 | |
c3f6f71d JM |
1558 | if (!win) |
1559 | warning ("procfs: set_traced_signals failed"); | |
1560 | return win; | |
c906108c SS |
1561 | } |
1562 | ||
1563 | /* | |
c3f6f71d JM |
1564 | * Function: proc_set_traced_faults |
1565 | * | |
1566 | * Register to trace hardware faults in the process or LWP. | |
1567 | * Returns non-zero for success, zero for failure. | |
1568 | */ | |
c906108c | 1569 | |
c3f6f71d JM |
1570 | int |
1571 | proc_set_traced_faults (pi, fltset) | |
1572 | procinfo *pi; | |
1573 | fltset_t *fltset; | |
1574 | { | |
1575 | int win; | |
1576 | ||
1577 | /* | |
1578 | * We should never have to apply this operation to any procinfo | |
1579 | * except the one for the main process. If that ever changes | |
1580 | * for any reason, then take out the following clause and | |
1581 | * replace it with one that makes sure the ctl_fd is open. | |
1582 | */ | |
1583 | ||
1584 | if (pi->tid != 0) | |
1585 | pi = find_procinfo_or_die (pi->pid, 0); | |
1586 | ||
1587 | #ifdef NEW_PROC_API | |
1588 | { | |
1589 | struct { | |
6c1a54b2 | 1590 | long cmd; |
c3f6f71d JM |
1591 | /* Use char array to avoid alignment issues. */ |
1592 | char fltset[sizeof (fltset_t)]; | |
1593 | } arg; | |
c906108c | 1594 | |
c3f6f71d JM |
1595 | arg.cmd = PCSFAULT; |
1596 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1597 | |
c3f6f71d JM |
1598 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1599 | } | |
1600 | #else /* ioctl method */ | |
1601 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1602 | #endif | |
1603 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1604 | pi->status_valid = 0; | |
c906108c | 1605 | |
c3f6f71d JM |
1606 | return win; |
1607 | } | |
c5aa993b | 1608 | |
c3f6f71d JM |
1609 | /* |
1610 | * Function: proc_set_traced_sysentry | |
1611 | * | |
1612 | * Register to trace entry to system calls in the process or LWP. | |
1613 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1614 | */ |
1615 | ||
c3f6f71d JM |
1616 | int |
1617 | proc_set_traced_sysentry (pi, sysset) | |
1618 | procinfo *pi; | |
1619 | sysset_t *sysset; | |
c906108c | 1620 | { |
c3f6f71d JM |
1621 | int win; |
1622 | ||
1623 | /* | |
1624 | * We should never have to apply this operation to any procinfo | |
1625 | * except the one for the main process. If that ever changes | |
1626 | * for any reason, then take out the following clause and | |
1627 | * replace it with one that makes sure the ctl_fd is open. | |
1628 | */ | |
1629 | ||
1630 | if (pi->tid != 0) | |
1631 | pi = find_procinfo_or_die (pi->pid, 0); | |
1632 | ||
1633 | #ifdef NEW_PROC_API | |
1634 | { | |
1635 | struct { | |
6c1a54b2 | 1636 | long cmd; |
c3f6f71d JM |
1637 | /* Use char array to avoid alignment issues. */ |
1638 | char sysset[sizeof (sysset_t)]; | |
1639 | } arg; | |
1640 | ||
1641 | arg.cmd = PCSENTRY; | |
1642 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
1643 | ||
1644 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
1645 | } | |
1646 | #else /* ioctl method */ | |
1647 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1648 | #endif | |
1649 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1650 | pi->status_valid = 0; | |
1651 | ||
1652 | return win; | |
c906108c SS |
1653 | } |
1654 | ||
1655 | /* | |
c3f6f71d JM |
1656 | * Function: proc_set_traced_sysexit |
1657 | * | |
1658 | * Register to trace exit from system calls in the process or LWP. | |
1659 | * Returns non-zero for success, zero for failure. | |
1660 | */ | |
c906108c | 1661 | |
c3f6f71d JM |
1662 | int |
1663 | proc_set_traced_sysexit (pi, sysset) | |
1664 | procinfo *pi; | |
1665 | sysset_t *sysset; | |
1666 | { | |
1667 | int win; | |
1668 | ||
1669 | /* | |
1670 | * We should never have to apply this operation to any procinfo | |
1671 | * except the one for the main process. If that ever changes | |
1672 | * for any reason, then take out the following clause and | |
1673 | * replace it with one that makes sure the ctl_fd is open. | |
1674 | */ | |
1675 | ||
1676 | if (pi->tid != 0) | |
1677 | pi = find_procinfo_or_die (pi->pid, 0); | |
1678 | ||
1679 | #ifdef NEW_PROC_API | |
1680 | { | |
1681 | struct { | |
6c1a54b2 | 1682 | long cmd; |
c3f6f71d JM |
1683 | /* Use char array to avoid alignment issues. */ |
1684 | char sysset[sizeof (sysset_t)]; | |
1685 | } arg; | |
c906108c | 1686 | |
c3f6f71d JM |
1687 | arg.cmd = PCSEXIT; |
1688 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1689 | |
c3f6f71d JM |
1690 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1691 | } | |
1692 | #else /* ioctl method */ | |
1693 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1694 | #endif | |
1695 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1696 | pi->status_valid = 0; | |
c906108c | 1697 | |
c3f6f71d JM |
1698 | return win; |
1699 | } | |
c906108c | 1700 | |
c3f6f71d JM |
1701 | /* |
1702 | * Function: proc_set_held_signals | |
1703 | * | |
1704 | * Specify the set of blocked / held signals in the process or LWP. | |
1705 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1706 | */ |
1707 | ||
c3f6f71d JM |
1708 | int |
1709 | proc_set_held_signals (pi, sighold) | |
1710 | procinfo *pi; | |
1711 | sigset_t *sighold; | |
c906108c | 1712 | { |
c3f6f71d JM |
1713 | int win; |
1714 | ||
1715 | /* | |
1716 | * We should never have to apply this operation to any procinfo | |
1717 | * except the one for the main process. If that ever changes | |
1718 | * for any reason, then take out the following clause and | |
1719 | * replace it with one that makes sure the ctl_fd is open. | |
1720 | */ | |
1721 | ||
1722 | if (pi->tid != 0) | |
1723 | pi = find_procinfo_or_die (pi->pid, 0); | |
1724 | ||
1725 | #ifdef NEW_PROC_API | |
1726 | { | |
1727 | struct { | |
6c1a54b2 | 1728 | long cmd; |
c3f6f71d JM |
1729 | /* Use char array to avoid alignment issues. */ |
1730 | char hold[sizeof (sigset_t)]; | |
1731 | } arg; | |
1732 | ||
1733 | arg.cmd = PCSHOLD; | |
1734 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1735 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1736 | } | |
c906108c | 1737 | #else |
c3f6f71d | 1738 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1739 | #endif |
c3f6f71d JM |
1740 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1741 | pi->status_valid = 0; | |
1742 | ||
1743 | return win; | |
c906108c SS |
1744 | } |
1745 | ||
1746 | /* | |
c3f6f71d JM |
1747 | * Function: proc_get_pending_signals |
1748 | * | |
1749 | * returns the set of signals that are pending in the process or LWP. | |
1750 | * Will also copy the sigset if 'save' is non-zero. | |
1751 | */ | |
c906108c | 1752 | |
c3f6f71d JM |
1753 | sigset_t * |
1754 | proc_get_pending_signals (pi, save) | |
1755 | procinfo *pi; | |
1756 | sigset_t *save; | |
1757 | { | |
1758 | sigset_t *ret = NULL; | |
1759 | ||
1760 | /* | |
1761 | * We should never have to apply this operation to any procinfo | |
1762 | * except the one for the main process. If that ever changes | |
1763 | * for any reason, then take out the following clause and | |
1764 | * replace it with one that makes sure the ctl_fd is open. | |
1765 | */ | |
1766 | ||
1767 | if (pi->tid != 0) | |
1768 | pi = find_procinfo_or_die (pi->pid, 0); | |
1769 | ||
1770 | if (!pi->status_valid) | |
1771 | if (!proc_get_status (pi)) | |
1772 | return NULL; | |
1773 | ||
1774 | #ifdef NEW_PROC_API | |
1775 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1776 | #else | |
1777 | ret = &pi->prstatus.pr_sigpend; | |
1778 | #endif | |
1779 | if (save && ret) | |
1780 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1781 | |
c3f6f71d JM |
1782 | return ret; |
1783 | } | |
c906108c | 1784 | |
c3f6f71d JM |
1785 | /* |
1786 | * Function: proc_get_signal_actions | |
1787 | * | |
1788 | * returns the set of signal actions. | |
1789 | * Will also copy the sigactionset if 'save' is non-zero. | |
1790 | */ | |
c906108c | 1791 | |
c3f6f71d JM |
1792 | struct sigaction * |
1793 | proc_get_signal_actions (pi, save) | |
1794 | procinfo *pi; | |
1795 | struct sigaction *save; | |
1796 | { | |
1797 | struct sigaction *ret = NULL; | |
1798 | ||
1799 | /* | |
1800 | * We should never have to apply this operation to any procinfo | |
1801 | * except the one for the main process. If that ever changes | |
1802 | * for any reason, then take out the following clause and | |
1803 | * replace it with one that makes sure the ctl_fd is open. | |
1804 | */ | |
1805 | ||
1806 | if (pi->tid != 0) | |
1807 | pi = find_procinfo_or_die (pi->pid, 0); | |
1808 | ||
1809 | if (!pi->status_valid) | |
1810 | if (!proc_get_status (pi)) | |
1811 | return NULL; | |
1812 | ||
1813 | #ifdef NEW_PROC_API | |
1814 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1815 | #else | |
1816 | ret = &pi->prstatus.pr_action; | |
1817 | #endif | |
1818 | if (save && ret) | |
1819 | memcpy (save, ret, sizeof (struct sigaction)); | |
c906108c | 1820 | |
c3f6f71d JM |
1821 | return ret; |
1822 | } | |
c5aa993b | 1823 | |
c3f6f71d JM |
1824 | /* |
1825 | * Function: proc_get_held_signals | |
1826 | * | |
1827 | * returns the set of signals that are held / blocked. | |
1828 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
1829 | */ |
1830 | ||
c3f6f71d JM |
1831 | sigset_t * |
1832 | proc_get_held_signals (pi, save) | |
1833 | procinfo *pi; | |
1834 | sigset_t *save; | |
c906108c | 1835 | { |
c3f6f71d JM |
1836 | sigset_t *ret = NULL; |
1837 | ||
1838 | /* | |
1839 | * We should never have to apply this operation to any procinfo | |
1840 | * except the one for the main process. If that ever changes | |
1841 | * for any reason, then take out the following clause and | |
1842 | * replace it with one that makes sure the ctl_fd is open. | |
1843 | */ | |
1844 | ||
1845 | if (pi->tid != 0) | |
1846 | pi = find_procinfo_or_die (pi->pid, 0); | |
1847 | ||
1848 | #ifdef NEW_PROC_API | |
1849 | if (!pi->status_valid) | |
1850 | if (!proc_get_status (pi)) | |
1851 | return NULL; | |
1852 | ||
1853 | #ifdef UNIXWARE | |
1854 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1855 | #else |
c3f6f71d JM |
1856 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1857 | #endif /* UNIXWARE */ | |
1858 | #else /* not NEW_PROC_API */ | |
1859 | { | |
1860 | static sigset_t sigheld; | |
1861 | ||
1862 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1863 | ret = &sigheld; | |
1864 | } | |
1865 | #endif /* NEW_PROC_API */ | |
1866 | if (save && ret) | |
1867 | memcpy (save, ret, sizeof (sigset_t)); | |
1868 | ||
1869 | return ret; | |
c906108c SS |
1870 | } |
1871 | ||
c3f6f71d JM |
1872 | /* |
1873 | * Function: proc_get_traced_signals | |
1874 | * | |
1875 | * returns the set of signals that are traced / debugged. | |
1876 | * Will also copy the sigset if 'save' is non-zero. | |
1877 | */ | |
1878 | ||
1879 | sigset_t * | |
1880 | proc_get_traced_signals (pi, save) | |
1881 | procinfo *pi; | |
1882 | sigset_t *save; | |
c906108c | 1883 | { |
c3f6f71d JM |
1884 | sigset_t *ret = NULL; |
1885 | ||
1886 | /* | |
1887 | * We should never have to apply this operation to any procinfo | |
1888 | * except the one for the main process. If that ever changes | |
1889 | * for any reason, then take out the following clause and | |
1890 | * replace it with one that makes sure the ctl_fd is open. | |
1891 | */ | |
1892 | ||
1893 | if (pi->tid != 0) | |
1894 | pi = find_procinfo_or_die (pi->pid, 0); | |
1895 | ||
1896 | #ifdef NEW_PROC_API | |
1897 | if (!pi->status_valid) | |
1898 | if (!proc_get_status (pi)) | |
1899 | return NULL; | |
1900 | ||
1901 | ret = &pi->prstatus.pr_sigtrace; | |
1902 | #else | |
1903 | { | |
1904 | static sigset_t sigtrace; | |
1905 | ||
1906 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1907 | ret = &sigtrace; | |
1908 | } | |
c906108c | 1909 | #endif |
c3f6f71d JM |
1910 | if (save && ret) |
1911 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1912 | |
c3f6f71d JM |
1913 | return ret; |
1914 | } | |
c906108c | 1915 | |
c3f6f71d JM |
1916 | /* |
1917 | * Function: proc_trace_signal | |
1918 | * | |
1919 | * Add 'signo' to the set of signals that are traced. | |
1920 | * Returns non-zero for success, zero for failure. | |
1921 | */ | |
c906108c | 1922 | |
c3f6f71d JM |
1923 | int |
1924 | proc_trace_signal (pi, signo) | |
1925 | procinfo *pi; | |
1926 | int signo; | |
1927 | { | |
1928 | sigset_t temp; | |
1929 | ||
1930 | /* | |
1931 | * We should never have to apply this operation to any procinfo | |
1932 | * except the one for the main process. If that ever changes | |
1933 | * for any reason, then take out the following clause and | |
1934 | * replace it with one that makes sure the ctl_fd is open. | |
1935 | */ | |
1936 | ||
1937 | if (pi->tid != 0) | |
1938 | pi = find_procinfo_or_die (pi->pid, 0); | |
1939 | ||
1940 | if (pi) | |
c906108c | 1941 | { |
c3f6f71d | 1942 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1943 | { |
c3f6f71d JM |
1944 | praddset (&temp, signo); |
1945 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
1946 | } |
1947 | } | |
c5aa993b | 1948 | |
c3f6f71d JM |
1949 | return 0; /* failure */ |
1950 | } | |
c906108c | 1951 | |
c3f6f71d JM |
1952 | /* |
1953 | * Function: proc_ignore_signal | |
1954 | * | |
1955 | * Remove 'signo' from the set of signals that are traced. | |
1956 | * Returns non-zero for success, zero for failure. | |
1957 | */ | |
c906108c | 1958 | |
c3f6f71d JM |
1959 | int |
1960 | proc_ignore_signal (pi, signo) | |
1961 | procinfo *pi; | |
1962 | int signo; | |
1963 | { | |
1964 | sigset_t temp; | |
1965 | ||
1966 | /* | |
1967 | * We should never have to apply this operation to any procinfo | |
1968 | * except the one for the main process. If that ever changes | |
1969 | * for any reason, then take out the following clause and | |
1970 | * replace it with one that makes sure the ctl_fd is open. | |
1971 | */ | |
1972 | ||
1973 | if (pi->tid != 0) | |
1974 | pi = find_procinfo_or_die (pi->pid, 0); | |
1975 | ||
1976 | if (pi) | |
c906108c | 1977 | { |
c3f6f71d | 1978 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1979 | { |
c3f6f71d JM |
1980 | prdelset (&temp, signo); |
1981 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 1982 | } |
c906108c | 1983 | } |
c906108c | 1984 | |
c3f6f71d | 1985 | return 0; /* failure */ |
c906108c SS |
1986 | } |
1987 | ||
1988 | /* | |
c3f6f71d JM |
1989 | * Function: proc_get_traced_faults |
1990 | * | |
1991 | * returns the set of hardware faults that are traced /debugged. | |
1992 | * Will also copy the faultset if 'save' is non-zero. | |
1993 | */ | |
1994 | ||
1995 | fltset_t * | |
1996 | proc_get_traced_faults (pi, save) | |
1997 | procinfo *pi; | |
1998 | fltset_t *save; | |
1999 | { | |
2000 | fltset_t *ret = NULL; | |
2001 | ||
2002 | /* | |
2003 | * We should never have to apply this operation to any procinfo | |
2004 | * except the one for the main process. If that ever changes | |
2005 | * for any reason, then take out the following clause and | |
2006 | * replace it with one that makes sure the ctl_fd is open. | |
2007 | */ | |
2008 | ||
2009 | if (pi->tid != 0) | |
2010 | pi = find_procinfo_or_die (pi->pid, 0); | |
2011 | ||
2012 | #ifdef NEW_PROC_API | |
2013 | if (!pi->status_valid) | |
2014 | if (!proc_get_status (pi)) | |
2015 | return NULL; | |
2016 | ||
2017 | ret = &pi->prstatus.pr_flttrace; | |
2018 | #else | |
2019 | { | |
2020 | static fltset_t flttrace; | |
2021 | ||
2022 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2023 | ret = &flttrace; | |
2024 | } | |
2025 | #endif | |
2026 | if (save && ret) | |
2027 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2028 | |
c3f6f71d JM |
2029 | return ret; |
2030 | } | |
c906108c | 2031 | |
c3f6f71d JM |
2032 | /* |
2033 | * Function: proc_get_traced_sysentry | |
2034 | * | |
2035 | * returns the set of syscalls that are traced /debugged on entry. | |
2036 | * Will also copy the syscall set if 'save' is non-zero. | |
2037 | */ | |
c906108c | 2038 | |
c3f6f71d JM |
2039 | sysset_t * |
2040 | proc_get_traced_sysentry (pi, save) | |
2041 | procinfo *pi; | |
2042 | sysset_t *save; | |
2043 | { | |
2044 | sysset_t *ret = NULL; | |
2045 | ||
2046 | /* | |
2047 | * We should never have to apply this operation to any procinfo | |
2048 | * except the one for the main process. If that ever changes | |
2049 | * for any reason, then take out the following clause and | |
2050 | * replace it with one that makes sure the ctl_fd is open. | |
2051 | */ | |
2052 | ||
2053 | if (pi->tid != 0) | |
2054 | pi = find_procinfo_or_die (pi->pid, 0); | |
2055 | ||
2056 | #ifdef NEW_PROC_API | |
2057 | if (!pi->status_valid) | |
2058 | if (!proc_get_status (pi)) | |
2059 | return NULL; | |
2060 | ||
2061 | ret = &pi->prstatus.pr_sysentry; | |
2062 | #else | |
2063 | { | |
2064 | static sysset_t sysentry; | |
c906108c | 2065 | |
c3f6f71d JM |
2066 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2067 | ret = &sysentry; | |
2068 | } | |
2069 | #endif | |
2070 | if (save && ret) | |
2071 | memcpy (save, ret, sizeof (sysset_t)); | |
c906108c | 2072 | |
c3f6f71d JM |
2073 | return ret; |
2074 | } | |
c5aa993b | 2075 | |
c3f6f71d JM |
2076 | /* |
2077 | * Function: proc_get_traced_sysexit | |
2078 | * | |
2079 | * returns the set of syscalls that are traced /debugged on exit. | |
2080 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2081 | */ |
2082 | ||
c3f6f71d JM |
2083 | sysset_t * |
2084 | proc_get_traced_sysexit (pi, save) | |
2085 | procinfo *pi; | |
2086 | sysset_t *save; | |
c906108c | 2087 | { |
c3f6f71d JM |
2088 | sysset_t * ret = NULL; |
2089 | ||
2090 | /* | |
2091 | * We should never have to apply this operation to any procinfo | |
2092 | * except the one for the main process. If that ever changes | |
2093 | * for any reason, then take out the following clause and | |
2094 | * replace it with one that makes sure the ctl_fd is open. | |
2095 | */ | |
2096 | ||
2097 | if (pi->tid != 0) | |
2098 | pi = find_procinfo_or_die (pi->pid, 0); | |
2099 | ||
2100 | #ifdef NEW_PROC_API | |
2101 | if (!pi->status_valid) | |
2102 | if (!proc_get_status (pi)) | |
2103 | return NULL; | |
2104 | ||
2105 | ret = &pi->prstatus.pr_sysexit; | |
2106 | #else | |
2107 | { | |
2108 | static sysset_t sysexit; | |
c5aa993b | 2109 | |
c3f6f71d JM |
2110 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2111 | ret = &sysexit; | |
2112 | } | |
2113 | #endif | |
2114 | if (save && ret) | |
2115 | memcpy (save, ret, sizeof (sysset_t)); | |
2116 | ||
2117 | return ret; | |
2118 | } | |
c906108c | 2119 | |
c3f6f71d JM |
2120 | /* |
2121 | * Function: proc_clear_current_fault | |
2122 | * | |
2123 | * The current fault (if any) is cleared; the associated signal | |
2124 | * will not be sent to the process or LWP when it resumes. | |
2125 | * Returns non-zero for success, zero for failure. | |
2126 | */ | |
c906108c | 2127 | |
c3f6f71d JM |
2128 | int |
2129 | proc_clear_current_fault (pi) | |
2130 | procinfo *pi; | |
2131 | { | |
2132 | int win; | |
2133 | ||
2134 | /* | |
2135 | * We should never have to apply this operation to any procinfo | |
2136 | * except the one for the main process. If that ever changes | |
2137 | * for any reason, then take out the following clause and | |
2138 | * replace it with one that makes sure the ctl_fd is open. | |
2139 | */ | |
2140 | ||
2141 | if (pi->tid != 0) | |
2142 | pi = find_procinfo_or_die (pi->pid, 0); | |
2143 | ||
2144 | #ifdef NEW_PROC_API | |
2145 | { | |
6c1a54b2 | 2146 | long cmd = PCCFAULT; |
c3f6f71d JM |
2147 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2148 | } | |
2149 | #else | |
2150 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2151 | #endif | |
2152 | ||
2153 | return win; | |
c906108c SS |
2154 | } |
2155 | ||
2156 | /* | |
c3f6f71d JM |
2157 | * Function: proc_set_current_signal |
2158 | * | |
2159 | * Set the "current signal" that will be delivered next to the process. | |
2160 | * NOTE: semantics are different from those of KILL. | |
2161 | * This signal will be delivered to the process or LWP | |
2162 | * immediately when it is resumed (even if the signal is held/blocked); | |
2163 | * it will NOT immediately cause another event of interest, and will NOT | |
2164 | * first trap back to the debugger. | |
2165 | * | |
2166 | * Returns non-zero for success, zero for failure. | |
2167 | */ | |
2168 | ||
2169 | int | |
2170 | proc_set_current_signal (pi, signo) | |
2171 | procinfo *pi; | |
2172 | int signo; | |
2173 | { | |
2174 | int win; | |
2175 | struct { | |
6c1a54b2 | 2176 | long cmd; |
c3f6f71d JM |
2177 | /* Use char array to avoid alignment issues. */ |
2178 | char sinfo[sizeof (struct siginfo)]; | |
2179 | } arg; | |
2180 | struct siginfo *mysinfo; | |
2181 | ||
2182 | /* | |
2183 | * We should never have to apply this operation to any procinfo | |
2184 | * except the one for the main process. If that ever changes | |
2185 | * for any reason, then take out the following clause and | |
2186 | * replace it with one that makes sure the ctl_fd is open. | |
2187 | */ | |
2188 | ||
2189 | if (pi->tid != 0) | |
2190 | pi = find_procinfo_or_die (pi->pid, 0); | |
2191 | ||
2192 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2193 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2194 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2195 | * it messes up the current signal. Work around the kernel bug. | |
2196 | */ | |
2197 | if (signo > 0 && | |
2198 | signo == proc_cursig (pi)) | |
2199 | return 1; /* I assume this is a success? */ | |
2200 | #endif | |
2201 | ||
2202 | /* The pointer is just a type alias. */ | |
2203 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2204 | mysinfo->si_signo = signo; | |
2205 | mysinfo->si_code = 0; | |
2206 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2207 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2208 | ||
2209 | #ifdef NEW_PROC_API | |
2210 | arg.cmd = PCSSIG; | |
2211 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2212 | #else | |
2213 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2214 | #endif | |
c906108c | 2215 | |
c3f6f71d JM |
2216 | return win; |
2217 | } | |
c906108c | 2218 | |
c3f6f71d JM |
2219 | /* |
2220 | * Function: proc_clear_current_signal | |
2221 | * | |
2222 | * The current signal (if any) is cleared, and | |
2223 | * is not sent to the process or LWP when it resumes. | |
2224 | * Returns non-zero for success, zero for failure. | |
2225 | */ | |
c906108c | 2226 | |
c3f6f71d JM |
2227 | int |
2228 | proc_clear_current_signal (pi) | |
2229 | procinfo *pi; | |
2230 | { | |
2231 | int win; | |
2232 | ||
2233 | /* | |
2234 | * We should never have to apply this operation to any procinfo | |
2235 | * except the one for the main process. If that ever changes | |
2236 | * for any reason, then take out the following clause and | |
2237 | * replace it with one that makes sure the ctl_fd is open. | |
2238 | */ | |
2239 | ||
2240 | if (pi->tid != 0) | |
2241 | pi = find_procinfo_or_die (pi->pid, 0); | |
2242 | ||
2243 | #ifdef NEW_PROC_API | |
2244 | { | |
2245 | struct { | |
6c1a54b2 | 2246 | long cmd; |
c3f6f71d JM |
2247 | /* Use char array to avoid alignment issues. */ |
2248 | char sinfo[sizeof (struct siginfo)]; | |
2249 | } arg; | |
2250 | struct siginfo *mysinfo; | |
2251 | ||
2252 | arg.cmd = PCSSIG; | |
2253 | /* The pointer is just a type alias. */ | |
2254 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2255 | mysinfo->si_signo = 0; | |
2256 | mysinfo->si_code = 0; | |
2257 | mysinfo->si_errno = 0; | |
2258 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2259 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2260 | ||
2261 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2262 | } | |
2263 | #else | |
2264 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2265 | #endif | |
c906108c | 2266 | |
c3f6f71d JM |
2267 | return win; |
2268 | } | |
c906108c | 2269 | |
c3f6f71d JM |
2270 | /* |
2271 | * Function: proc_get_gregs | |
2272 | * | |
2273 | * Get the general registers for the process or LWP. | |
2274 | * Returns non-zero for success, zero for failure. | |
2275 | */ | |
c906108c | 2276 | |
c3f6f71d JM |
2277 | gdb_gregset_t * |
2278 | proc_get_gregs (pi) | |
2279 | procinfo *pi; | |
2280 | { | |
2281 | if (!pi->status_valid || !pi->gregs_valid) | |
2282 | if (!proc_get_status (pi)) | |
2283 | return NULL; | |
2284 | ||
2285 | /* | |
2286 | * OK, sorry about the ifdef's. | |
2287 | * There's three cases instead of two, because | |
2288 | * in this instance Unixware and Solaris/RW differ. | |
2289 | */ | |
2290 | ||
2291 | #ifdef NEW_PROC_API | |
2292 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2293 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2294 | #else /* not Unixware */ | |
2295 | return &pi->prstatus.pr_lwp.pr_reg; | |
2296 | #endif /* Unixware */ | |
2297 | #else /* not NEW_PROC_API */ | |
2298 | return &pi->prstatus.pr_reg; | |
2299 | #endif /* NEW_PROC_API */ | |
2300 | } | |
c5aa993b | 2301 | |
c3f6f71d JM |
2302 | /* |
2303 | * Function: proc_get_fpregs | |
2304 | * | |
2305 | * Get the floating point registers for the process or LWP. | |
2306 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2307 | */ |
2308 | ||
c3f6f71d JM |
2309 | gdb_fpregset_t * |
2310 | proc_get_fpregs (pi) | |
2311 | procinfo *pi; | |
c906108c | 2312 | { |
c3f6f71d JM |
2313 | #ifdef NEW_PROC_API |
2314 | if (!pi->status_valid || !pi->fpregs_valid) | |
2315 | if (!proc_get_status (pi)) | |
2316 | return NULL; | |
2317 | ||
2318 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2319 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2320 | #else | |
2321 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2322 | #endif /* Unixware */ | |
c5aa993b | 2323 | |
c3f6f71d JM |
2324 | #else /* not NEW_PROC_API */ |
2325 | if (pi->fpregs_valid) | |
2326 | return &pi->fpregset; /* already got 'em */ | |
2327 | else | |
c906108c | 2328 | { |
c3f6f71d JM |
2329 | if (pi->ctl_fd == 0 && |
2330 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2331 | { |
c3f6f71d | 2332 | return NULL; |
c906108c | 2333 | } |
c3f6f71d | 2334 | else |
c906108c | 2335 | { |
c3f6f71d JM |
2336 | #ifdef PIOCTGFPREG |
2337 | struct { | |
2338 | long pr_count; | |
2339 | tid_t pr_error_thread; | |
2340 | tfpregset_t thread_1; | |
2341 | } thread_fpregs; | |
2342 | ||
2343 | thread_fpregs.pr_count = 1; | |
2344 | thread_fpregs.thread_1.tid = pi->tid; | |
2345 | ||
2346 | if (pi->tid == 0 && | |
2347 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2348 | { | |
2349 | pi->fpregs_valid = 1; | |
2350 | return &pi->fpregset; /* got 'em now! */ | |
2351 | } | |
2352 | else if (pi->tid != 0 && | |
2353 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2354 | { | |
2355 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2356 | sizeof (pi->fpregset)); | |
2357 | pi->fpregs_valid = 1; | |
2358 | return &pi->fpregset; /* got 'em now! */ | |
2359 | } | |
2360 | else | |
2361 | { | |
2362 | return NULL; | |
2363 | } | |
2364 | #else | |
2365 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2366 | { | |
2367 | pi->fpregs_valid = 1; | |
2368 | return &pi->fpregset; /* got 'em now! */ | |
2369 | } | |
2370 | else | |
2371 | { | |
2372 | return NULL; | |
2373 | } | |
2374 | #endif | |
c906108c | 2375 | } |
c906108c | 2376 | } |
c3f6f71d | 2377 | #endif |
c906108c SS |
2378 | } |
2379 | ||
c3f6f71d JM |
2380 | /* |
2381 | * Function: proc_set_gregs | |
2382 | * | |
2383 | * Write the general registers back to the process or LWP. | |
2384 | * Returns non-zero for success, zero for failure. | |
2385 | */ | |
2386 | ||
2387 | int | |
2388 | proc_set_gregs (pi) | |
2389 | procinfo *pi; | |
c906108c | 2390 | { |
c3f6f71d JM |
2391 | gdb_gregset_t *gregs; |
2392 | int win; | |
c5aa993b | 2393 | |
c3f6f71d JM |
2394 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2395 | return 0; /* get_regs has already warned */ | |
2396 | ||
2397 | if (pi->ctl_fd == 0 && | |
2398 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2399 | { |
c3f6f71d | 2400 | return 0; |
c906108c | 2401 | } |
c3f6f71d | 2402 | else |
c906108c | 2403 | { |
c3f6f71d JM |
2404 | #ifdef NEW_PROC_API |
2405 | struct { | |
6c1a54b2 | 2406 | long cmd; |
c3f6f71d JM |
2407 | /* Use char array to avoid alignment issues. */ |
2408 | char gregs[sizeof (gdb_gregset_t)]; | |
2409 | } arg; | |
2410 | ||
2411 | arg.cmd = PCSREG; | |
2412 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2413 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2414 | #else | |
2415 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2416 | #endif | |
c906108c | 2417 | } |
c3f6f71d JM |
2418 | |
2419 | /* Policy: writing the regs invalidates our cache. */ | |
2420 | pi->gregs_valid = 0; | |
2421 | return win; | |
c906108c SS |
2422 | } |
2423 | ||
c3f6f71d JM |
2424 | /* |
2425 | * Function: proc_set_fpregs | |
2426 | * | |
2427 | * Modify the floating point register set of the process or LWP. | |
2428 | * Returns non-zero for success, zero for failure. | |
2429 | */ | |
2430 | ||
2431 | int | |
2432 | proc_set_fpregs (pi) | |
2433 | procinfo *pi; | |
c906108c | 2434 | { |
c3f6f71d JM |
2435 | gdb_fpregset_t *fpregs; |
2436 | int win; | |
2437 | ||
2438 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2439 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2440 | |
c3f6f71d JM |
2441 | if (pi->ctl_fd == 0 && |
2442 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2443 | { |
c3f6f71d | 2444 | return 0; |
c906108c | 2445 | } |
c3f6f71d | 2446 | else |
c906108c | 2447 | { |
c3f6f71d JM |
2448 | #ifdef NEW_PROC_API |
2449 | struct { | |
6c1a54b2 | 2450 | long cmd; |
c3f6f71d JM |
2451 | /* Use char array to avoid alignment issues. */ |
2452 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2453 | } arg; | |
2454 | ||
2455 | arg.cmd = PCSFPREG; | |
2456 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2457 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2458 | #else | |
2459 | #ifdef PIOCTSFPREG | |
2460 | if (pi->tid == 0) | |
2461 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2462 | else | |
2463 | { | |
2464 | struct { | |
2465 | long pr_count; | |
2466 | tid_t pr_error_thread; | |
2467 | tfpregset_t thread_1; | |
2468 | } thread_fpregs; | |
2469 | ||
2470 | thread_fpregs.pr_count = 1; | |
2471 | thread_fpregs.thread_1.tid = pi->tid; | |
2472 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2473 | sizeof (*fpregs)); | |
2474 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2475 | } | |
2476 | #else | |
2477 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2478 | #endif /* osf PIOCTSFPREG */ | |
2479 | #endif /* NEW_PROC_API */ | |
c906108c | 2480 | } |
c3f6f71d JM |
2481 | |
2482 | /* Policy: writing the regs invalidates our cache. */ | |
2483 | pi->fpregs_valid = 0; | |
2484 | return win; | |
c906108c SS |
2485 | } |
2486 | ||
2487 | /* | |
c3f6f71d JM |
2488 | * Function: proc_kill |
2489 | * | |
2490 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2491 | * Returns non-zero for success, zero for failure. | |
2492 | */ | |
c906108c | 2493 | |
c3f6f71d JM |
2494 | int |
2495 | proc_kill (pi, signo) | |
2496 | procinfo *pi; | |
2497 | int signo; | |
2498 | { | |
2499 | int win; | |
c906108c | 2500 | |
c3f6f71d JM |
2501 | /* |
2502 | * We might conceivably apply this operation to an LWP, and | |
2503 | * the LWP's ctl file descriptor might not be open. | |
2504 | */ | |
c906108c | 2505 | |
c3f6f71d JM |
2506 | if (pi->ctl_fd == 0 && |
2507 | open_procinfo_files (pi, FD_CTL) == 0) | |
2508 | { | |
2509 | return 0; | |
2510 | } | |
2511 | else | |
2512 | { | |
2513 | #ifdef NEW_PROC_API | |
6c1a54b2 | 2514 | long cmd[2]; |
c906108c | 2515 | |
c3f6f71d JM |
2516 | cmd[0] = PCKILL; |
2517 | cmd[1] = signo; | |
2518 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2519 | #else /* ioctl method */ | |
2520 | /* FIXME: do I need the Alpha OSF fixups present in | |
2521 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2522 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2523 | #endif | |
2524 | } | |
c906108c | 2525 | |
c3f6f71d JM |
2526 | return win; |
2527 | } | |
c906108c | 2528 | |
c3f6f71d JM |
2529 | /* |
2530 | * Function: proc_parent_pid | |
2531 | * | |
2532 | * Find the pid of the process that started this one. | |
2533 | * Returns the parent process pid, or zero. | |
c906108c SS |
2534 | */ |
2535 | ||
c3f6f71d JM |
2536 | int |
2537 | proc_parent_pid (pi) | |
2538 | procinfo *pi; | |
c906108c | 2539 | { |
c3f6f71d JM |
2540 | /* |
2541 | * We should never have to apply this operation to any procinfo | |
2542 | * except the one for the main process. If that ever changes | |
2543 | * for any reason, then take out the following clause and | |
2544 | * replace it with one that makes sure the ctl_fd is open. | |
2545 | */ | |
2546 | ||
2547 | if (pi->tid != 0) | |
2548 | pi = find_procinfo_or_die (pi->pid, 0); | |
2549 | ||
2550 | if (!pi->status_valid) | |
2551 | if (!proc_get_status (pi)) | |
2552 | return 0; | |
c5aa993b | 2553 | |
c3f6f71d JM |
2554 | return pi->prstatus.pr_ppid; |
2555 | } | |
2556 | ||
2557 | ||
2558 | /* | |
2559 | * Function: proc_set_watchpoint | |
2560 | * | |
2561 | */ | |
2562 | ||
2563 | int | |
2564 | proc_set_watchpoint (pi, addr, len, wflags) | |
03905a3c MS |
2565 | procinfo *pi; |
2566 | CORE_ADDR addr; | |
c3f6f71d JM |
2567 | int len; |
2568 | int wflags; | |
2569 | { | |
2570 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2571 | return 0; | |
2572 | #else | |
2573 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2574 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2575 | return 0; | |
2576 | #else | |
2577 | struct { | |
6c1a54b2 | 2578 | long cmd; |
c3f6f71d JM |
2579 | char watch[sizeof (prwatch_t)]; |
2580 | } arg; | |
2581 | prwatch_t *pwatch; | |
2582 | ||
2583 | pwatch = (prwatch_t *) &arg.watch; | |
2584 | pwatch->pr_vaddr = addr; | |
2585 | pwatch->pr_size = len; | |
2586 | pwatch->pr_wflags = wflags; | |
2587 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2588 | arg.cmd = PCWATCH; | |
2589 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2590 | #else | |
2591 | #if defined (PIOCSWATCH) | |
2592 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2593 | #else | |
2594 | return 0; /* Fail */ | |
2595 | #endif | |
2596 | #endif | |
2597 | #endif | |
2598 | #endif | |
c906108c SS |
2599 | } |
2600 | ||
2601 | /* | |
c3f6f71d JM |
2602 | * Function: proc_iterate_over_mappings |
2603 | * | |
2604 | * Given a pointer to a function, call that function once for every | |
2605 | * mapped address space in the process. The callback function | |
2606 | * receives an open file descriptor for the file corresponding to | |
2607 | * that mapped address space (if there is one), and the base address | |
2608 | * of the mapped space. Quit when the callback function returns a | |
2609 | * nonzero value, or at teh end of the mappings. | |
2610 | * | |
2611 | * Returns: the first non-zero return value of the callback function, | |
2612 | * or zero. | |
2613 | */ | |
c906108c | 2614 | |
c3f6f71d JM |
2615 | /* FIXME: it's probably a waste to cache this FD. |
2616 | It doesn't get called that often... and if I open it | |
2617 | every time, I don't need to lseek it. */ | |
2618 | int | |
2619 | proc_iterate_over_mappings (func) | |
2620 | int (*func) PARAMS ((int, CORE_ADDR)); | |
2621 | { | |
2622 | struct prmap *map; | |
2623 | procinfo *pi; | |
0d06e24b | 2624 | #ifndef NEW_PROC_API /* avoid compiler warning */ |
0fda6bd2 JM |
2625 | int nmaps = 0; |
2626 | int i; | |
2627 | #else | |
2628 | int map_fd; | |
2629 | char pathname[MAX_PROC_NAME_SIZE]; | |
0d06e24b | 2630 | #endif |
c3f6f71d | 2631 | int funcstat = 0; |
0fda6bd2 | 2632 | int fd; |
c906108c | 2633 | |
c3f6f71d | 2634 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); |
c906108c | 2635 | |
c3f6f71d JM |
2636 | #ifdef NEW_PROC_API |
2637 | /* Open map fd. */ | |
2638 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
2639 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
2640 | proc_error (pi, "proc_iterate_over_mappings (open)", __LINE__); | |
c906108c | 2641 | |
c3f6f71d | 2642 | /* Make sure it gets closed again. */ |
004527cb | 2643 | make_cleanup_close (map_fd); |
c906108c | 2644 | |
c3f6f71d JM |
2645 | /* Allocate space for mapping (lifetime only for this function). */ |
2646 | map = alloca (sizeof (struct prmap)); | |
c906108c | 2647 | |
c3f6f71d JM |
2648 | /* Now read the mappings from the file, |
2649 | open a file descriptor for those that have a name, | |
2650 | and call the callback function. */ | |
2651 | while (read (map_fd, | |
2652 | (void *) map, | |
2653 | sizeof (struct prmap)) == sizeof (struct prmap)) | |
2654 | { | |
2655 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
c906108c | 2656 | |
c3f6f71d JM |
2657 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
2658 | break; /* sanity */ | |
c906108c | 2659 | |
c3f6f71d JM |
2660 | if (map->pr_mapname[0] == 0) |
2661 | { | |
2662 | fd = -1; /* no map file */ | |
2663 | } | |
2664 | else | |
2665 | { | |
2666 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
2667 | /* Note: caller's responsibility to close this fd! */ | |
2668 | fd = open (name, O_RDONLY); | |
2669 | /* Note: we don't test the above call for failure; | |
2670 | we just pass the FD on as given. Sometimes there is | |
2671 | no file, so the ioctl may return failure, but that's | |
2672 | not a problem. */ | |
2673 | } | |
c906108c | 2674 | |
c3f6f71d JM |
2675 | /* Stop looping if the callback returns non-zero. */ |
2676 | if ((funcstat = (*func) (fd, (CORE_ADDR) map->pr_vaddr)) != 0) | |
2677 | break; | |
2678 | } | |
2679 | #else | |
2680 | /* Get the number of mapping entries. */ | |
2681 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmaps) < 0) | |
2682 | proc_error (pi, "proc_iterate_over_mappings (PIOCNMAP)", __LINE__); | |
2683 | ||
2684 | /* Allocate space for mappings (lifetime only this function). */ | |
2685 | map = (struct prmap *) alloca ((nmaps + 1) * sizeof (struct prmap)); | |
2686 | ||
2687 | /* Read in all the mappings. */ | |
2688 | if (ioctl (pi->ctl_fd, PIOCMAP, map) < 0) | |
2689 | proc_error (pi, "proc_iterate_over_mappings (PIOCMAP)", __LINE__); | |
2690 | ||
2691 | /* Now loop through the mappings, open an fd for each, and | |
2692 | call the callback function. */ | |
2693 | for (i = 0; | |
2694 | i < nmaps && map[i].pr_size != 0; | |
2695 | i++) | |
2696 | { | |
2697 | /* Note: caller's responsibility to close this fd! */ | |
2698 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map[i].pr_vaddr); | |
2699 | /* Note: we don't test the above call for failure; | |
2700 | we just pass the FD on as given. Sometimes there is | |
2701 | no file, so the ioctl may return failure, but that's | |
2702 | not a problem. */ | |
2703 | ||
2704 | /* Stop looping if the callback returns non-zero. */ | |
2705 | if ((funcstat = (*func) (fd, (CORE_ADDR) map[i].pr_vaddr)) != 0) | |
2706 | break; | |
2707 | } | |
c906108c | 2708 | #endif |
c906108c | 2709 | |
c3f6f71d JM |
2710 | return funcstat; |
2711 | } | |
c906108c | 2712 | |
c3f6f71d | 2713 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2714 | |
c3f6f71d | 2715 | #include <sys/sysi86.h> |
c906108c | 2716 | |
c3f6f71d JM |
2717 | /* |
2718 | * Function: proc_get_LDT_entry | |
2719 | * | |
2720 | * Inputs: | |
2721 | * procinfo *pi; | |
2722 | * int key; | |
2723 | * | |
2724 | * The 'key' is actually the value of the lower 16 bits of | |
2725 | * the GS register for the LWP that we're interested in. | |
2726 | * | |
2727 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2728 | */ |
2729 | ||
c3f6f71d JM |
2730 | struct ssd * |
2731 | proc_get_LDT_entry (pi, key) | |
2732 | procinfo *pi; | |
2733 | int key; | |
c906108c | 2734 | { |
c3f6f71d JM |
2735 | static struct ssd *ldt_entry = NULL; |
2736 | #ifdef NEW_PROC_API | |
2737 | char pathname[MAX_PROC_NAME_SIZE]; | |
2738 | struct cleanup *old_chain = NULL; | |
2739 | int fd; | |
2740 | ||
2741 | /* Allocate space for one LDT entry. | |
2742 | This alloc must persist, because we return a pointer to it. */ | |
2743 | if (ldt_entry == NULL) | |
2744 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2745 | ||
2746 | /* Open the file descriptor for the LDT table. */ | |
2747 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
2748 | if ((fd = open (pathname, O_RDONLY)) < 0) | |
c906108c | 2749 | { |
c3f6f71d JM |
2750 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2751 | return NULL; | |
c906108c | 2752 | } |
c3f6f71d | 2753 | /* Make sure it gets closed again! */ |
004527cb | 2754 | old_chain = make_cleanup_close (fd); |
c906108c | 2755 | |
c3f6f71d JM |
2756 | /* Now 'read' thru the table, find a match and return it. */ |
2757 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2758 | { |
c3f6f71d JM |
2759 | if (ldt_entry->sel == 0 && |
2760 | ldt_entry->bo == 0 && | |
2761 | ldt_entry->acc1 == 0 && | |
2762 | ldt_entry->acc2 == 0) | |
2763 | break; /* end of table */ | |
2764 | /* If key matches, return this entry. */ | |
2765 | if (ldt_entry->sel == key) | |
2766 | return ldt_entry; | |
c906108c | 2767 | } |
c3f6f71d JM |
2768 | /* Loop ended, match not found. */ |
2769 | return NULL; | |
2770 | #else | |
2771 | int nldt, i; | |
2772 | static int nalloc = 0; | |
c906108c | 2773 | |
c3f6f71d JM |
2774 | /* Get the number of LDT entries. */ |
2775 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2776 | { |
c3f6f71d JM |
2777 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2778 | return NULL; | |
c906108c SS |
2779 | } |
2780 | ||
c3f6f71d JM |
2781 | /* Allocate space for the number of LDT entries. */ |
2782 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2783 | if (nldt > nalloc) | |
c906108c | 2784 | { |
c3f6f71d JM |
2785 | ldt_entry = (struct ssd *) |
2786 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
2787 | nalloc = nldt; | |
2788 | } | |
2789 | ||
2790 | /* Read the whole table in one gulp. */ | |
2791 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2792 | { | |
2793 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2794 | return NULL; | |
c906108c SS |
2795 | } |
2796 | ||
c3f6f71d JM |
2797 | /* Search the table and return the (first) entry matching 'key'. */ |
2798 | for (i = 0; i < nldt; i++) | |
2799 | if (ldt_entry[i].sel == key) | |
2800 | return &ldt_entry[i]; | |
c906108c | 2801 | |
c3f6f71d JM |
2802 | /* Loop ended, match not found. */ |
2803 | return NULL; | |
2804 | #endif | |
2805 | } | |
c906108c | 2806 | |
c3f6f71d | 2807 | #endif /* TM_I386SOL2_H */ |
c906108c | 2808 | |
c3f6f71d | 2809 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2810 | |
c3f6f71d | 2811 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2812 | |
c3f6f71d JM |
2813 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2814 | since there is a different way to do threads on every OS. */ | |
c906108c | 2815 | |
c3f6f71d JM |
2816 | /* |
2817 | * Function: proc_get_nthreads | |
2818 | * | |
2819 | * Return the number of threads for the process | |
2820 | */ | |
c906108c | 2821 | |
c3f6f71d JM |
2822 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
2823 | /* | |
2824 | * OSF version | |
2825 | */ | |
2826 | int | |
2827 | proc_get_nthreads (pi) | |
2828 | procinfo *pi; | |
2829 | { | |
2830 | int nthreads = 0; | |
c906108c | 2831 | |
c3f6f71d JM |
2832 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2833 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2834 | |
c3f6f71d | 2835 | return nthreads; |
c906108c SS |
2836 | } |
2837 | ||
c3f6f71d JM |
2838 | #else |
2839 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2840 | /* | |
2841 | * Solaris and Unixware version | |
2842 | */ | |
2843 | int | |
2844 | proc_get_nthreads (pi) | |
2845 | procinfo *pi; | |
c906108c | 2846 | { |
c3f6f71d JM |
2847 | if (!pi->status_valid) |
2848 | if (!proc_get_status (pi)) | |
2849 | return 0; | |
c5aa993b | 2850 | |
c3f6f71d JM |
2851 | /* |
2852 | * NEW_PROC_API: only works for the process procinfo, | |
2853 | * because the LWP procinfos do not get prstatus filled in. | |
2854 | */ | |
2855 | #ifdef NEW_PROC_API | |
2856 | if (pi->tid != 0) /* find the parent process procinfo */ | |
2857 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 2858 | #endif |
c3f6f71d | 2859 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2860 | } |
2861 | ||
c3f6f71d JM |
2862 | #else |
2863 | /* | |
2864 | * Default version | |
2865 | */ | |
2866 | int | |
2867 | proc_get_nthreads (pi) | |
2868 | procinfo *pi; | |
c906108c | 2869 | { |
c3f6f71d JM |
2870 | return 0; |
2871 | } | |
2872 | #endif | |
2873 | #endif | |
2874 | ||
2875 | /* | |
2876 | * Function: proc_get_current_thread (LWP version) | |
2877 | * | |
2878 | * Return the ID of the thread that had an event of interest. | |
2879 | * (ie. the one that hit a breakpoint or other traced event). | |
2880 | * All other things being equal, this should be the ID of a | |
2881 | * thread that is currently executing. | |
2882 | */ | |
2883 | ||
2884 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2885 | /* | |
2886 | * Solaris and Unixware version | |
2887 | */ | |
2888 | int | |
2889 | proc_get_current_thread (pi) | |
2890 | procinfo *pi; | |
2891 | { | |
2892 | /* | |
2893 | * Note: this should be applied to the root procinfo for the process, | |
2894 | * not to the procinfo for an LWP. If applied to the procinfo for | |
2895 | * an LWP, it will simply return that LWP's ID. In that case, | |
2896 | * find the parent process procinfo. | |
2897 | */ | |
2898 | ||
2899 | if (pi->tid != 0) | |
2900 | pi = find_procinfo_or_die (pi->pid, 0); | |
2901 | ||
2902 | if (!pi->status_valid) | |
2903 | if (!proc_get_status (pi)) | |
2904 | return 0; | |
2905 | ||
2906 | #ifdef NEW_PROC_API | |
2907 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2908 | #else |
c3f6f71d | 2909 | return pi->prstatus.pr_who; |
c906108c | 2910 | #endif |
c3f6f71d | 2911 | } |
c906108c | 2912 | |
c3f6f71d JM |
2913 | #else |
2914 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
2915 | /* | |
2916 | * OSF version | |
2917 | */ | |
2918 | int | |
2919 | proc_get_current_thread (pi) | |
2920 | procinfo *pi; | |
2921 | { | |
2922 | #if 0 /* FIXME: not ready for prime time? */ | |
2923 | return pi->prstatus.pr_tid; | |
2924 | #else | |
2925 | return 0; | |
2926 | #endif | |
c906108c SS |
2927 | } |
2928 | ||
c3f6f71d JM |
2929 | #else |
2930 | /* | |
2931 | * Default version | |
2932 | */ | |
2933 | int | |
2934 | proc_get_current_thread (pi) | |
2935 | procinfo *pi; | |
c906108c | 2936 | { |
c3f6f71d JM |
2937 | return 0; |
2938 | } | |
2939 | ||
2940 | #endif | |
2941 | #endif | |
c906108c | 2942 | |
c3f6f71d JM |
2943 | /* |
2944 | * Function: proc_update_threads | |
2945 | * | |
2946 | * Discover the IDs of all the threads within the process, and | |
2947 | * create a procinfo for each of them (chained to the parent). | |
2948 | * | |
2949 | * This unfortunately requires a different method on every OS. | |
2950 | * | |
2951 | * Return: non-zero for success, zero for failure. | |
2952 | */ | |
c906108c | 2953 | |
c3f6f71d JM |
2954 | int |
2955 | proc_delete_dead_threads (parent, thread, ignore) | |
2956 | procinfo *parent; | |
2957 | procinfo *thread; | |
2958 | void *ignore; | |
2959 | { | |
2960 | if (thread && parent) /* sanity */ | |
c906108c | 2961 | { |
c3f6f71d JM |
2962 | thread->status_valid = 0; |
2963 | if (!proc_get_status (thread)) | |
2964 | destroy_one_procinfo (&parent->thread_list, thread); | |
2965 | } | |
2966 | return 0; /* keep iterating */ | |
2967 | } | |
c5aa993b | 2968 | |
c3f6f71d JM |
2969 | #if defined (PIOCLSTATUS) |
2970 | /* | |
2971 | * Solaris 2.5 (ioctl) version | |
2972 | */ | |
2973 | int | |
2974 | proc_update_threads (pi) | |
2975 | procinfo *pi; | |
2976 | { | |
2977 | gdb_prstatus_t *prstatus; | |
2978 | struct cleanup *old_chain = NULL; | |
2979 | procinfo *thread; | |
2980 | int nlwp, i; | |
2981 | ||
2982 | /* | |
2983 | * We should never have to apply this operation to any procinfo | |
2984 | * except the one for the main process. If that ever changes | |
2985 | * for any reason, then take out the following clause and | |
2986 | * replace it with one that makes sure the ctl_fd is open. | |
2987 | */ | |
2988 | ||
2989 | if (pi->tid != 0) | |
2990 | pi = find_procinfo_or_die (pi->pid, 0); | |
2991 | ||
2992 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2993 | ||
2994 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2995 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2996 | ||
2997 | if ((prstatus = (gdb_prstatus_t *) | |
2998 | malloc (sizeof (gdb_prstatus_t) * (nlwp + 1))) == 0) | |
2999 | perror_with_name ("procfs: malloc failed in update_threads"); | |
3000 | ||
3001 | old_chain = make_cleanup (free, prstatus); | |
3002 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) | |
3003 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3004 | ||
3005 | /* Skip element zero, which represents the process as a whole. */ | |
3006 | for (i = 1; i < nlwp + 1; i++) | |
3007 | { | |
3008 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3009 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3010 | |
c3f6f71d JM |
3011 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3012 | thread->status_valid = 1; | |
3013 | } | |
3014 | pi->threads_valid = 1; | |
3015 | do_cleanups (old_chain); | |
3016 | return 1; | |
3017 | } | |
3018 | #else | |
3019 | #ifdef NEW_PROC_API | |
3020 | /* | |
3021 | * Unixware and Solaris 6 (and later) version | |
3022 | */ | |
004527cb AC |
3023 | static void |
3024 | do_closedir_cleanup (void *dir) | |
3025 | { | |
3026 | closedir (dir); | |
3027 | } | |
3028 | ||
c3f6f71d JM |
3029 | int |
3030 | proc_update_threads (pi) | |
3031 | procinfo *pi; | |
3032 | { | |
3033 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3034 | struct dirent *direntry; | |
3035 | struct cleanup *old_chain = NULL; | |
3036 | procinfo *thread; | |
3037 | DIR *dirp; | |
3038 | int lwpid; | |
3039 | ||
3040 | /* | |
3041 | * We should never have to apply this operation to any procinfo | |
3042 | * except the one for the main process. If that ever changes | |
3043 | * for any reason, then take out the following clause and | |
3044 | * replace it with one that makes sure the ctl_fd is open. | |
3045 | */ | |
3046 | ||
3047 | if (pi->tid != 0) | |
3048 | pi = find_procinfo_or_die (pi->pid, 0); | |
3049 | ||
3050 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3051 | ||
3052 | /* | |
3053 | * Unixware | |
3054 | * | |
3055 | * Note: this brute-force method is the only way I know of | |
3056 | * to accomplish this task on Unixware. This method will | |
3057 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3058 | * and more elegant way to do this on Solaris, but the margins | |
3059 | * of this manuscript are too small to write it here... ;-) | |
3060 | */ | |
3061 | ||
3062 | strcpy (pathname, pi->pathname); | |
3063 | strcat (pathname, "/lwp"); | |
3064 | if ((dirp = opendir (pathname)) == NULL) | |
3065 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3066 | ||
004527cb | 3067 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3068 | while ((direntry = readdir (dirp)) != NULL) |
3069 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3070 | { | |
3071 | lwpid = atoi (&direntry->d_name[0]); | |
3072 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3073 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3074 | } | |
3075 | pi->threads_valid = 1; | |
3076 | do_cleanups (old_chain); | |
3077 | return 1; | |
3078 | } | |
3079 | #else | |
3080 | #ifdef PIOCTLIST | |
3081 | /* | |
3082 | * OSF version | |
3083 | */ | |
3084 | int | |
3085 | proc_update_threads (pi) | |
3086 | procinfo *pi; | |
3087 | { | |
3088 | int nthreads, i; | |
3089 | tid_t *threads; | |
3090 | ||
3091 | /* | |
3092 | * We should never have to apply this operation to any procinfo | |
3093 | * except the one for the main process. If that ever changes | |
3094 | * for any reason, then take out the following clause and | |
3095 | * replace it with one that makes sure the ctl_fd is open. | |
3096 | */ | |
3097 | ||
3098 | if (pi->tid != 0) | |
3099 | pi = find_procinfo_or_die (pi->pid, 0); | |
3100 | ||
3101 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3102 | ||
3103 | nthreads = proc_get_nthreads (pi); | |
3104 | if (nthreads < 2) | |
3105 | return 0; /* nothing to do for 1 or fewer threads */ | |
3106 | ||
3107 | if ((threads = malloc (nthreads * sizeof (tid_t))) == NULL) | |
3108 | proc_error (pi, "update_threads, malloc", __LINE__); | |
3109 | ||
3110 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3111 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3112 | ||
3113 | for (i = 0; i < nthreads; i++) | |
3114 | { | |
3115 | if (!find_procinfo (pi->pid, threads[i])) | |
3116 | if (!create_procinfo (pi->pid, threads[i])) | |
3117 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3118 | } |
c3f6f71d JM |
3119 | pi->threads_valid = 1; |
3120 | return 1; | |
c906108c | 3121 | } |
c3f6f71d JM |
3122 | #else |
3123 | /* | |
3124 | * Default version | |
3125 | */ | |
3126 | int | |
3127 | proc_update_threads (pi) | |
3128 | procinfo *pi; | |
3129 | { | |
3130 | return 0; | |
3131 | } | |
3132 | #endif /* OSF PIOCTLIST */ | |
3133 | #endif /* NEW_PROC_API */ | |
3134 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3135 | |
c3f6f71d JM |
3136 | /* |
3137 | * Function: proc_iterate_over_threads | |
3138 | * | |
3139 | * Description: | |
3140 | * Given a pointer to a function, call that function once | |
3141 | * for each lwp in the procinfo list, until the function | |
3142 | * returns non-zero, in which event return the value | |
3143 | * returned by the function. | |
3144 | * | |
3145 | * Note: this function does NOT call update_threads. | |
3146 | * If you want to discover new threads first, you must | |
3147 | * call that function explicitly. This function just makes | |
3148 | * a quick pass over the currently-known procinfos. | |
3149 | * | |
3150 | * Arguments: | |
3151 | * pi - parent process procinfo | |
3152 | * func - per-thread function | |
3153 | * ptr - opaque parameter for function. | |
3154 | * | |
3155 | * Return: | |
3156 | * First non-zero return value from the callee, or zero. | |
3157 | */ | |
3158 | ||
3159 | int | |
3160 | proc_iterate_over_threads (pi, func, ptr) | |
3161 | procinfo *pi; | |
3162 | int (*func) PARAMS ((procinfo *, procinfo *, void *)); | |
3163 | void *ptr; | |
c906108c | 3164 | { |
c3f6f71d JM |
3165 | procinfo *thread, *next; |
3166 | int retval = 0; | |
c906108c | 3167 | |
c3f6f71d JM |
3168 | /* |
3169 | * We should never have to apply this operation to any procinfo | |
3170 | * except the one for the main process. If that ever changes | |
3171 | * for any reason, then take out the following clause and | |
3172 | * replace it with one that makes sure the ctl_fd is open. | |
3173 | */ | |
3174 | ||
3175 | if (pi->tid != 0) | |
3176 | pi = find_procinfo_or_die (pi->pid, 0); | |
3177 | ||
3178 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3179 | { |
c3f6f71d JM |
3180 | next = thread->next; /* in case thread is destroyed */ |
3181 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3182 | break; | |
c906108c | 3183 | } |
c3f6f71d JM |
3184 | |
3185 | return retval; | |
c906108c SS |
3186 | } |
3187 | ||
c3f6f71d JM |
3188 | /* =================== END, Thread "MODULE" =================== */ |
3189 | ||
3190 | /* =================== END, /proc "MODULE" =================== */ | |
3191 | ||
3192 | /* =================== GDB "MODULE" =================== */ | |
3193 | ||
3194 | /* | |
3195 | * Here are all of the gdb target vector functions and their friends. | |
3196 | */ | |
3197 | ||
3198 | static int do_attach PARAMS ((int pid)); | |
3199 | static void do_detach PARAMS ((int signo)); | |
3200 | static int register_gdb_signals PARAMS ((procinfo *, sigset_t *)); | |
3201 | ||
3202 | /* | |
3203 | * Function: procfs_debug_inferior | |
3204 | * | |
3205 | * Sets up the inferior to be debugged. | |
3206 | * Registers to trace signals, hardware faults, and syscalls. | |
3207 | * Note: does not set RLC flag: caller may want to customize that. | |
3208 | * | |
3209 | * Returns: zero for success (note! unlike most functions in this module) | |
3210 | * On failure, returns the LINE NUMBER where it failed! | |
3211 | */ | |
3212 | ||
3213 | static int | |
3214 | procfs_debug_inferior (pi) | |
3215 | procinfo *pi; | |
c906108c | 3216 | { |
c3f6f71d JM |
3217 | fltset_t traced_faults; |
3218 | sigset_t traced_signals; | |
3219 | sysset_t traced_syscall_entries; | |
3220 | sysset_t traced_syscall_exits; | |
c906108c | 3221 | |
c3f6f71d JM |
3222 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3223 | /* On some systems (OSF), we don't trace hardware faults. | |
3224 | Apparently it's enough that we catch them as signals. | |
3225 | Wonder why we don't just do that in general? */ | |
3226 | premptyset (&traced_faults); /* don't trace faults. */ | |
3227 | #else | |
3228 | /* Register to trace hardware faults in the child. */ | |
3229 | prfillset (&traced_faults); /* trace all faults... */ | |
3230 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3231 | #endif | |
3232 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3233 | return __LINE__; | |
c906108c | 3234 | |
c3f6f71d JM |
3235 | /* Register to trace selected signals in the child. */ |
3236 | premptyset (&traced_signals); | |
3237 | if (!register_gdb_signals (pi, &traced_signals)) | |
3238 | return __LINE__; | |
3239 | ||
3240 | /* Register to trace the 'exit' system call (on entry). */ | |
3241 | premptyset (&traced_syscall_entries); | |
3242 | praddset (&traced_syscall_entries, SYS_exit); | |
3243 | #ifdef SYS_lwpexit | |
3244 | praddset (&traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ | |
3245 | #endif | |
3246 | #ifdef SYS_lwp_exit | |
3247 | praddset (&traced_syscall_entries, SYS_lwp_exit); | |
c906108c SS |
3248 | #endif |
3249 | ||
c3f6f71d JM |
3250 | if (!proc_set_traced_sysentry (pi, &traced_syscall_entries)) |
3251 | return __LINE__; | |
3252 | ||
3253 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3254 | /* OSF method for tracing exec syscalls. Quoting: | |
3255 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3256 | exits from exec system calls because of the user level loader. */ | |
3257 | /* FIXME: make nice and maybe move into an access function. */ | |
3258 | { | |
3259 | int prfs_flags; | |
3260 | ||
3261 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3262 | return __LINE__; | |
3263 | ||
3264 | prfs_flags |= PRFS_STOPEXEC; | |
3265 | ||
3266 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3267 | return __LINE__; | |
3268 | } | |
3269 | #else /* not PRFS_STOPEXEC */ | |
3270 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3271 | /* GW: Rationale... | |
3272 | Not all systems with /proc have all the exec* syscalls with the same | |
3273 | names. On the SGI, for example, there is no SYS_exec, but there | |
3274 | *is* a SYS_execv. So, we try to account for that. */ | |
3275 | ||
3276 | premptyset (&traced_syscall_exits); | |
3277 | #ifdef SYS_exec | |
3278 | praddset (&traced_syscall_exits, SYS_exec); | |
3279 | #endif | |
3280 | #ifdef SYS_execve | |
3281 | praddset (&traced_syscall_exits, SYS_execve); | |
3282 | #endif | |
3283 | #ifdef SYS_execv | |
3284 | praddset (&traced_syscall_exits, SYS_execv); | |
3285 | #endif | |
c5aa993b | 3286 | |
c3f6f71d JM |
3287 | #ifdef SYS_lwpcreate |
3288 | praddset (&traced_syscall_exits, SYS_lwpcreate); | |
3289 | praddset (&traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3290 | #endif |
c5aa993b | 3291 | |
c3f6f71d JM |
3292 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
3293 | praddset (&traced_syscall_exits, SYS_lwp_create); | |
3294 | praddset (&traced_syscall_exits, SYS_lwp_exit); | |
3295 | #endif | |
c5aa993b | 3296 | |
c906108c | 3297 | |
c3f6f71d JM |
3298 | if (!proc_set_traced_sysexit (pi, &traced_syscall_exits)) |
3299 | return __LINE__; | |
3300 | ||
3301 | #endif /* PRFS_STOPEXEC */ | |
3302 | return 0; | |
c906108c SS |
3303 | } |
3304 | ||
c3f6f71d JM |
3305 | static void |
3306 | procfs_attach (args, from_tty) | |
3307 | char *args; | |
3308 | int from_tty; | |
c906108c | 3309 | { |
c3f6f71d JM |
3310 | char *exec_file; |
3311 | int pid; | |
3312 | ||
3313 | if (!args) | |
3314 | error_no_arg ("process-id to attach"); | |
3315 | ||
3316 | pid = atoi (args); | |
3317 | if (pid == getpid ()) | |
3318 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3319 | |
c3f6f71d | 3320 | if (from_tty) |
c906108c | 3321 | { |
c3f6f71d JM |
3322 | exec_file = get_exec_file (0); |
3323 | ||
3324 | if (exec_file) | |
3325 | printf_filtered ("Attaching to program `%s', %s\n", | |
3326 | exec_file, target_pid_to_str (pid)); | |
3327 | else | |
3328 | printf_filtered ("Attaching to %s\n", target_pid_to_str (pid)); | |
3329 | ||
3330 | fflush (stdout); | |
c906108c | 3331 | } |
c3f6f71d JM |
3332 | inferior_pid = do_attach (pid); |
3333 | push_target (&procfs_ops); | |
3334 | } | |
3335 | ||
3336 | static void | |
3337 | procfs_detach (args, from_tty) | |
3338 | char *args; | |
3339 | int from_tty; | |
3340 | { | |
3341 | char *exec_file; | |
3342 | int signo = 0; | |
3343 | ||
3344 | if (from_tty) | |
c906108c | 3345 | { |
c3f6f71d JM |
3346 | exec_file = get_exec_file (0); |
3347 | if (exec_file == 0) | |
3348 | exec_file = ""; | |
3349 | printf_filtered ("Detaching from program: %s %s\n", | |
3350 | exec_file, target_pid_to_str (inferior_pid)); | |
3351 | fflush (stdout); | |
c906108c | 3352 | } |
c3f6f71d JM |
3353 | if (args) |
3354 | signo = atoi (args); | |
3355 | ||
3356 | do_detach (signo); | |
3357 | inferior_pid = 0; | |
3358 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ | |
c906108c SS |
3359 | } |
3360 | ||
c3f6f71d JM |
3361 | static int |
3362 | do_attach (pid) | |
3363 | int pid; | |
c906108c | 3364 | { |
c3f6f71d JM |
3365 | procinfo *pi; |
3366 | int fail; | |
3367 | ||
3368 | if ((pi = create_procinfo (pid, 0)) == NULL) | |
3369 | perror ("procfs: out of memory in 'attach'"); | |
3370 | ||
3371 | if (!open_procinfo_files (pi, FD_CTL)) | |
3372 | { | |
3373 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3374 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
3375 | pid); | |
3376 | dead_procinfo (pi, errmsg, NOKILL); | |
3377 | } | |
c906108c | 3378 | |
c3f6f71d JM |
3379 | /* Stop the process (if it isn't already stopped). */ |
3380 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3381 | { |
c3f6f71d JM |
3382 | pi->was_stopped = 1; |
3383 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3384 | } |
3385 | else | |
3386 | { | |
c3f6f71d JM |
3387 | pi->was_stopped = 0; |
3388 | /* Set the process to run again when we close it. */ | |
3389 | if (!proc_set_run_on_last_close (pi)) | |
3390 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3391 | ||
3392 | /* Now stop the process. */ | |
3393 | if (!proc_stop_process (pi)) | |
3394 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3395 | pi->ignore_next_sigstop = 1; | |
c906108c | 3396 | } |
c3f6f71d JM |
3397 | /* Save some of the /proc state to be restored if we detach. */ |
3398 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3399 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3400 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3401 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
3402 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
3403 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", | |
3404 | NOKILL); | |
3405 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
3406 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", | |
3407 | NOKILL); | |
3408 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3409 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3410 | ||
3411 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3412 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3413 | ||
3414 | /* Let GDB know that the inferior was attached. */ | |
3415 | attach_flag = 1; | |
3416 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3417 | } |
3418 | ||
3419 | static void | |
c3f6f71d JM |
3420 | do_detach (signo) |
3421 | int signo; | |
c906108c | 3422 | { |
c3f6f71d | 3423 | procinfo *pi; |
c906108c | 3424 | |
c3f6f71d JM |
3425 | /* Find procinfo for the main process */ |
3426 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); /* FIXME: threads */ | |
3427 | if (signo) | |
3428 | if (!proc_set_current_signal (pi, signo)) | |
3429 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3430 | |
c3f6f71d JM |
3431 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3432 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3433 | |
c3f6f71d JM |
3434 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3435 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3436 | ||
3437 | if (!proc_set_traced_sysentry (pi, &pi->saved_entryset)) | |
3438 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); | |
3439 | ||
3440 | if (!proc_set_traced_sysexit (pi, &pi->saved_exitset)) | |
3441 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); | |
3442 | ||
3443 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3444 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3445 | ||
3446 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3447 | if (signo || !(pi->was_stopped) || | |
3448 | query ("Was stopped when attached, make it runnable again? ")) | |
3449 | { | |
3450 | /* Clear any pending signal. */ | |
3451 | if (!proc_clear_current_fault (pi)) | |
3452 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3453 | ||
3454 | if (!proc_set_run_on_last_close (pi)) | |
3455 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3456 | } | |
3457 | ||
3458 | attach_flag = 0; | |
3459 | destroy_procinfo (pi); | |
c906108c SS |
3460 | } |
3461 | ||
c3f6f71d JM |
3462 | /* |
3463 | * fetch_registers | |
3464 | * | |
3465 | * Since the /proc interface cannot give us individual registers, | |
3466 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3467 | * This results in the possibility that we will do unnecessarily many | |
3468 | * fetches, since we may be called repeatedly for individual registers. | |
3469 | * So we cache the results, and mark the cache invalid when the process | |
3470 | * is resumed. | |
3471 | */ | |
3472 | ||
02d5252f MS |
3473 | /* These could go in a header file, but the many and various |
3474 | definitions of gregset_t would make it tricky and ugly. Several | |
3475 | different native operating systems (notably Solaris and Linux) have | |
3476 | various different definitions for gregset_t and fpregset_t. We | |
3477 | have been kludging around this problem for a while, it would be | |
3478 | nice if someday we came up with a prettier way of handling it | |
3479 | (FIXME). */ | |
3480 | ||
3481 | extern void fill_gregset (gdb_gregset_t *, int); | |
3482 | extern void fill_fpregset (gdb_fpregset_t *, int); | |
3483 | extern void supply_gregset (gdb_gregset_t *); | |
3484 | extern void supply_fpregset (gdb_fpregset_t *); | |
3485 | ||
c906108c | 3486 | static void |
c3f6f71d JM |
3487 | procfs_fetch_registers (regno) |
3488 | int regno; | |
c906108c | 3489 | { |
c3f6f71d JM |
3490 | gdb_fpregset_t *fpregs; |
3491 | gdb_gregset_t *gregs; | |
3492 | procinfo *pi; | |
3493 | int pid; | |
3494 | int tid; | |
c906108c | 3495 | |
c3f6f71d JM |
3496 | pid = PIDGET (inferior_pid); |
3497 | tid = TIDGET (inferior_pid); | |
3498 | ||
3499 | /* First look up procinfo for the main process. */ | |
3500 | pi = find_procinfo_or_die (pid, 0); | |
3501 | ||
3502 | /* If the event thread is not the same as GDB's requested thread | |
3503 | (ie. inferior_pid), then look up procinfo for the requested | |
3504 | thread. */ | |
3505 | if ((tid != 0) && | |
3506 | (tid != proc_get_current_thread (pi))) | |
3507 | pi = find_procinfo_or_die (pid, tid); | |
3508 | ||
3509 | if (pi == NULL) | |
3510 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
3511 | target_pid_to_str (inferior_pid)); | |
3512 | ||
3513 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3514 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3515 | ||
3516 | supply_gregset (gregs); | |
3517 | ||
60054393 MS |
3518 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3519 | { | |
3520 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3521 | regno == PC_REGNUM || | |
3522 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3523 | regno == FP_REGNUM || | |
3524 | regno == SP_REGNUM) | |
3525 | return; /* not a floating point register */ | |
c5aa993b | 3526 | |
60054393 MS |
3527 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3528 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3529 | |
60054393 MS |
3530 | supply_fpregset (fpregs); |
3531 | } | |
c906108c SS |
3532 | } |
3533 | ||
c3f6f71d JM |
3534 | /* Get ready to modify the registers array. On machines which store |
3535 | individual registers, this doesn't need to do anything. On | |
3536 | machines which store all the registers in one fell swoop, such as | |
3537 | /proc, this makes sure that registers contains all the registers | |
3538 | from the program being debugged. */ | |
3539 | ||
c906108c | 3540 | static void |
c3f6f71d | 3541 | procfs_prepare_to_store () |
c906108c | 3542 | { |
c3f6f71d JM |
3543 | #ifdef CHILD_PREPARE_TO_STORE |
3544 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3545 | #endif |
c906108c SS |
3546 | } |
3547 | ||
3548 | /* | |
c3f6f71d JM |
3549 | * store_registers |
3550 | * | |
3551 | * Since the /proc interface will not read individual registers, | |
3552 | * we will cache these requests until the process is resumed, and | |
3553 | * only then write them back to the inferior process. | |
3554 | * | |
3555 | * FIXME: is that a really bad idea? Have to think about cases | |
3556 | * where writing one register might affect the value of others, etc. | |
3557 | */ | |
c906108c | 3558 | |
c3f6f71d JM |
3559 | static void |
3560 | procfs_store_registers (regno) | |
3561 | int regno; | |
3562 | { | |
3563 | gdb_fpregset_t *fpregs; | |
3564 | gdb_gregset_t *gregs; | |
3565 | procinfo *pi; | |
3566 | int pid; | |
3567 | int tid; | |
c906108c | 3568 | |
c3f6f71d JM |
3569 | pid = PIDGET (inferior_pid); |
3570 | tid = TIDGET (inferior_pid); | |
c906108c | 3571 | |
c3f6f71d JM |
3572 | /* First find procinfo for main process */ |
3573 | pi = find_procinfo_or_die (pid, 0); | |
3574 | ||
3575 | /* If current lwp for process is not the same as requested thread | |
3576 | (ie. inferior_pid), then find procinfo for the requested thread. */ | |
3577 | ||
3578 | if ((tid != 0) && | |
3579 | (tid != proc_get_current_thread (pi))) | |
3580 | pi = find_procinfo_or_die (pid, tid); | |
3581 | ||
3582 | if (pi == NULL) | |
3583 | error ("procfs: store_registers: failed to find procinfo for %s", | |
3584 | target_pid_to_str (inferior_pid)); | |
c906108c | 3585 | |
c3f6f71d JM |
3586 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3587 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3588 | |
c3f6f71d JM |
3589 | fill_gregset (gregs, regno); |
3590 | if (!proc_set_gregs (pi)) | |
3591 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3592 | |
60054393 MS |
3593 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3594 | { | |
3595 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3596 | regno == PC_REGNUM || | |
3597 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3598 | regno == FP_REGNUM || | |
3599 | regno == SP_REGNUM) | |
3600 | return; /* not a floating point register */ | |
3601 | ||
3602 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3603 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3604 | ||
3605 | fill_fpregset (fpregs, regno); | |
3606 | if (!proc_set_fpregs (pi)) | |
3607 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3608 | } | |
c3f6f71d | 3609 | } |
c906108c | 3610 | |
c3f6f71d JM |
3611 | /* |
3612 | * Function: target_wait | |
3613 | * | |
3614 | * Retrieve the next stop event from the child process. | |
3615 | * If child has not stopped yet, wait for it to stop. | |
3616 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3617 | * into gdb internal event codes. | |
3618 | * | |
3619 | * Return: id of process (and possibly thread) that incurred the event. | |
3620 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3621 | */ |
3622 | ||
c3f6f71d JM |
3623 | static int |
3624 | procfs_wait (pid, status) | |
3625 | int pid; | |
3626 | struct target_waitstatus *status; | |
c906108c | 3627 | { |
c3f6f71d JM |
3628 | /* First cut: loosely based on original version 2.1 */ |
3629 | procinfo *pi; | |
3630 | int temp, wstat; | |
3631 | int retval; | |
3632 | int why, what, flags; | |
3633 | int retry = 0; | |
c906108c | 3634 | |
c3f6f71d | 3635 | wait_again: |
c906108c | 3636 | |
c3f6f71d JM |
3637 | retry++; |
3638 | wstat = 0; | |
3639 | retval = -1; | |
c906108c | 3640 | |
c3f6f71d JM |
3641 | /* Find procinfo for main process */ |
3642 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
3643 | if (pi) | |
c906108c | 3644 | { |
c3f6f71d JM |
3645 | /* We must assume that the status is stale now... */ |
3646 | pi->status_valid = 0; | |
3647 | pi->gregs_valid = 0; | |
3648 | pi->fpregs_valid = 0; | |
3649 | ||
3650 | #if 0 /* just try this out... */ | |
3651 | flags = proc_flags (pi); | |
3652 | why = proc_why (pi); | |
3653 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3654 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3655 | #endif | |
3656 | /* If child is not stopped, wait for it to stop. */ | |
3657 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3658 | !proc_wait_for_stop (pi)) | |
c906108c | 3659 | { |
c3f6f71d JM |
3660 | /* wait_for_stop failed: has the child terminated? */ |
3661 | if (errno == ENOENT) | |
c906108c | 3662 | { |
c3f6f71d JM |
3663 | /* /proc file not found; presumably child has terminated. */ |
3664 | retval = wait (&wstat); /* "wait" for the child's exit */ | |
3665 | ||
3666 | if (retval != PIDGET (inferior_pid)) /* wrong child? */ | |
3667 | error ("procfs: couldn't stop process %d: wait returned %d\n", | |
3668 | inferior_pid, retval); | |
3669 | /* FIXME: might I not just use waitpid? | |
3670 | Or try find_procinfo to see if I know about this child? */ | |
c906108c | 3671 | } |
c3f6f71d | 3672 | else |
c906108c | 3673 | { |
c3f6f71d JM |
3674 | /* Unknown error from wait_for_stop. */ |
3675 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3676 | } |
c3f6f71d JM |
3677 | } |
3678 | else | |
3679 | { | |
3680 | /* This long block is reached if either: | |
3681 | a) the child was already stopped, or | |
3682 | b) we successfully waited for the child with wait_for_stop. | |
3683 | This block will analyze the /proc status, and translate it | |
3684 | into a waitstatus for GDB. | |
3685 | ||
3686 | If we actually had to call wait because the /proc file | |
3687 | is gone (child terminated), then we skip this block, | |
3688 | because we already have a waitstatus. */ | |
3689 | ||
3690 | flags = proc_flags (pi); | |
3691 | why = proc_why (pi); | |
3692 | what = proc_what (pi); | |
3693 | ||
c3f6f71d | 3694 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3695 | { |
c3f6f71d JM |
3696 | #ifdef PR_ASYNC |
3697 | /* If it's running async (for single_thread control), | |
3698 | set it back to normal again. */ | |
3699 | if (flags & PR_ASYNC) | |
3700 | if (!proc_unset_async (pi)) | |
3701 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3702 | #endif | |
3703 | ||
3704 | if (info_verbose) | |
3705 | proc_prettyprint_why (why, what, 1); | |
3706 | ||
3707 | /* The 'pid' we will return to GDB is composed of | |
3708 | the process ID plus the lwp ID. */ | |
3709 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3710 | ||
3711 | switch (why) { | |
3712 | case PR_SIGNALLED: | |
3713 | wstat = (what << 8) | 0177; | |
3714 | break; | |
3715 | case PR_SYSENTRY: | |
3716 | switch (what) { | |
3717 | #ifdef SYS_lwp_exit | |
3718 | case SYS_lwp_exit: | |
3719 | #endif | |
3720 | #ifdef SYS_lwpexit | |
3721 | case SYS_lwpexit: | |
3722 | #endif | |
3723 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3724 | printf_filtered ("[%s exited]\n", | |
3725 | target_pid_to_str (retval)); | |
3726 | delete_thread (retval); | |
3727 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3728 | return retval; | |
3729 | #endif /* _lwp_exit */ | |
3730 | ||
3731 | case SYS_exit: | |
3732 | /* Handle SYS_exit call only */ | |
3733 | /* Stopped at entry to SYS_exit. | |
3734 | Make it runnable, resume it, then use | |
3735 | the wait system call to get its exit code. | |
3736 | Proc_run_process always clears the current | |
3737 | fault and signal. | |
3738 | Then return its exit status. */ | |
3739 | pi->status_valid = 0; | |
3740 | wstat = 0; | |
3741 | /* FIXME: what we should do is return | |
3742 | TARGET_WAITKIND_SPURIOUS. */ | |
3743 | if (!proc_run_process (pi, 0, 0)) | |
3744 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3745 | if (attach_flag) | |
3746 | { | |
3747 | /* Don't call wait: simulate waiting for exit, | |
3748 | return a "success" exit code. Bogus: what if | |
3749 | it returns something else? */ | |
3750 | wstat = 0; | |
02d5252f | 3751 | retval = inferior_pid; /* ? ? ? */ |
c3f6f71d JM |
3752 | } |
3753 | else | |
3754 | { | |
3755 | int temp = wait (&wstat); | |
3756 | ||
3757 | /* FIXME: shouldn't I make sure I get the right | |
3758 | event from the right process? If (for | |
3759 | instance) I have killed an earlier inferior | |
3760 | process but failed to clean up after it | |
3761 | somehow, I could get its termination event | |
3762 | here. */ | |
3763 | ||
3764 | /* If wait returns -1, that's what we return to GDB. */ | |
3765 | if (temp < 0) | |
3766 | retval = temp; | |
3767 | } | |
3768 | break; | |
3769 | default: | |
3770 | printf_filtered ("procfs: trapped on entry to "); | |
3771 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3772 | printf_filtered ("\n"); | |
3773 | #ifndef PIOCSSPCACT | |
3774 | { | |
3775 | long i, nsysargs, *sysargs; | |
3776 | ||
3777 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3778 | (sysargs = proc_sysargs (pi)) != NULL) | |
3779 | { | |
0fda6bd2 | 3780 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3781 | for (i = 0; i < nsysargs; i++) |
02d5252f | 3782 | printf_filtered ("#%ld: 0x%08lx\n", |
c3f6f71d JM |
3783 | i, sysargs[i]); |
3784 | } | |
3785 | ||
3786 | } | |
3787 | #endif | |
3788 | if (status) | |
3789 | { | |
3790 | /* How to exit gracefully, returning "unknown event" */ | |
3791 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3792 | return inferior_pid; | |
3793 | } | |
3794 | else | |
3795 | { | |
3796 | /* How to keep going without returning to wfi: */ | |
3797 | target_resume (pid, 0, TARGET_SIGNAL_0); | |
3798 | goto wait_again; | |
3799 | } | |
3800 | break; | |
3801 | } | |
3802 | break; | |
3803 | case PR_SYSEXIT: | |
3804 | switch (what) { | |
3805 | #ifdef SYS_exec | |
3806 | case SYS_exec: | |
3807 | #endif | |
3808 | #ifdef SYS_execv | |
3809 | case SYS_execv: | |
3810 | #endif | |
3811 | #ifdef SYS_execve | |
3812 | case SYS_execve: | |
3813 | #endif | |
3814 | /* Hopefully this is our own "fork-child" execing | |
3815 | the real child. Hoax this event into a trap, and | |
3816 | GDB will see the child about to execute its start | |
3817 | address. */ | |
3818 | wstat = (SIGTRAP << 8) | 0177; | |
3819 | break; | |
3820 | #ifdef SYS_lwp_create | |
3821 | case SYS_lwp_create: | |
3822 | #endif | |
3823 | #ifdef SYS_lwpcreate | |
3824 | case SYS_lwpcreate: | |
3825 | #endif | |
3826 | #if defined(SYS_lwp_create) || defined(SYS_lwpcreate) | |
3827 | /* | |
3828 | * This syscall is somewhat like fork/exec. | |
3829 | * We will get the event twice: once for the parent LWP, | |
3830 | * and once for the child. We should already know about | |
3831 | * the parent LWP, but the child will be new to us. So, | |
3832 | * whenever we get this event, if it represents a new | |
3833 | * thread, simply add the thread to the list. | |
3834 | */ | |
3835 | ||
3836 | /* If not in procinfo list, add it. */ | |
3837 | temp = proc_get_current_thread (pi); | |
3838 | if (!find_procinfo (pi->pid, temp)) | |
3839 | create_procinfo (pi->pid, temp); | |
3840 | ||
3841 | temp = MERGEPID (pi->pid, temp); | |
3842 | /* If not in GDB's thread list, add it. */ | |
3843 | if (!in_thread_list (temp)) | |
3844 | { | |
3845 | printf_filtered ("[New %s]\n", target_pid_to_str (temp)); | |
3846 | add_thread (temp); | |
3847 | } | |
3848 | /* Return to WFI, but tell it to immediately resume. */ | |
3849 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3850 | return inferior_pid; | |
3851 | #endif /* _lwp_create */ | |
c906108c | 3852 | |
c3f6f71d JM |
3853 | #ifdef SYS_lwp_exit |
3854 | case SYS_lwp_exit: | |
3855 | #endif | |
3856 | #ifdef SYS_lwpexit | |
3857 | case SYS_lwpexit: | |
3858 | #endif | |
3859 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3860 | printf_filtered ("[%s exited]\n", | |
3861 | target_pid_to_str (retval)); | |
3862 | delete_thread (retval); | |
3863 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3864 | return retval; | |
3865 | #endif /* _lwp_exit */ | |
3866 | ||
3867 | #ifdef SYS_sproc | |
3868 | case SYS_sproc: | |
3869 | /* Nothing to do here for now. The old procfs | |
3870 | seemed to use this event to handle threads on | |
3871 | older (non-LWP) systems, where I'm assuming that | |
3872 | threads were actually separate processes. Irix, | |
3873 | maybe? Anyway, low priority for now. */ | |
3874 | #endif | |
3875 | #ifdef SYS_fork | |
3876 | case SYS_fork: | |
3877 | /* FIXME: do we need to handle this? Investigate. */ | |
3878 | #endif | |
3879 | #ifdef SYS_vfork | |
3880 | case SYS_vfork: | |
3881 | /* FIXME: see above. */ | |
3882 | #endif | |
3883 | default: | |
3884 | printf_filtered ("procfs: trapped on exit from "); | |
3885 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3886 | printf_filtered ("\n"); | |
3887 | #ifndef PIOCSSPCACT | |
3888 | { | |
3889 | long i, nsysargs, *sysargs; | |
3890 | ||
3891 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3892 | (sysargs = proc_sysargs (pi)) != NULL) | |
3893 | { | |
0fda6bd2 | 3894 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3895 | for (i = 0; i < nsysargs; i++) |
02d5252f | 3896 | printf_filtered ("#%ld: 0x%08lx\n", |
c3f6f71d JM |
3897 | i, sysargs[i]); |
3898 | } | |
3899 | } | |
3900 | #endif | |
3901 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3902 | return inferior_pid; | |
3903 | } | |
3904 | break; | |
3905 | case PR_REQUESTED: | |
3906 | #if 0 /* FIXME */ | |
3907 | wstat = (SIGSTOP << 8) | 0177; | |
3908 | break; | |
3909 | #else | |
3910 | if (retry < 5) | |
3911 | { | |
3912 | printf_filtered ("Retry #%d:\n", retry); | |
3913 | pi->status_valid = 0; | |
3914 | goto wait_again; | |
3915 | } | |
3916 | else | |
3917 | { | |
3918 | /* If not in procinfo list, add it. */ | |
3919 | temp = proc_get_current_thread (pi); | |
3920 | if (!find_procinfo (pi->pid, temp)) | |
3921 | create_procinfo (pi->pid, temp); | |
3922 | ||
3923 | /* If not in GDB's thread list, add it. */ | |
3924 | temp = MERGEPID (pi->pid, temp); | |
3925 | if (!in_thread_list (temp)) | |
3926 | { | |
0d06e24b | 3927 | printf_filtered ("[New %s]\n", |
c3f6f71d JM |
3928 | target_pid_to_str (temp)); |
3929 | add_thread (temp); | |
3930 | } | |
3931 | ||
3932 | status->kind = TARGET_WAITKIND_STOPPED; | |
3933 | status->value.sig = 0; | |
3934 | return retval; | |
3935 | } | |
3936 | #endif | |
3937 | case PR_JOBCONTROL: | |
3938 | wstat = (what << 8) | 0177; | |
3939 | break; | |
3940 | case PR_FAULTED: | |
3941 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
3942 | #ifdef FLTWATCH | |
3943 | case FLTWATCH: | |
3944 | wstat = (SIGTRAP << 8) | 0177; | |
3945 | break; | |
3946 | #endif | |
3947 | #ifdef FLTKWATCH | |
3948 | case FLTKWATCH: | |
3949 | wstat = (SIGTRAP << 8) | 0177; | |
3950 | break; | |
3951 | #endif | |
3952 | /* FIXME: use si_signo where possible. */ | |
3953 | case FLTPRIV: | |
3954 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
3955 | case FLTILL: | |
3956 | #endif | |
3957 | wstat = (SIGILL << 8) | 0177; | |
3958 | break; | |
3959 | case FLTBPT: | |
3960 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
3961 | case FLTTRACE: | |
3962 | #endif | |
3963 | wstat = (SIGTRAP << 8) | 0177; | |
3964 | break; | |
3965 | case FLTSTACK: | |
3966 | case FLTACCESS: | |
3967 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
3968 | case FLTBOUNDS: | |
3969 | #endif | |
3970 | wstat = (SIGSEGV << 8) | 0177; | |
3971 | break; | |
3972 | case FLTIOVF: | |
3973 | case FLTIZDIV: | |
3974 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
3975 | case FLTFPE: | |
3976 | #endif | |
3977 | wstat = (SIGFPE << 8) | 0177; | |
3978 | break; | |
3979 | case FLTPAGE: /* Recoverable page fault */ | |
3980 | default: /* FIXME: use si_signo if possible for fault */ | |
3981 | retval = -1; | |
3982 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3983 | printf_filtered ("child stopped for unknown reason:\n"); | |
3984 | proc_prettyprint_why (why, what, 1); | |
3985 | error ("... giving up..."); | |
3986 | break; | |
3987 | } | |
3988 | break; /* case PR_FAULTED: */ | |
3989 | default: /* switch (why) unmatched */ | |
3990 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3991 | printf_filtered ("child stopped for unknown reason:\n"); | |
3992 | proc_prettyprint_why (why, what, 1); | |
3993 | error ("... giving up..."); | |
3994 | break; | |
3995 | } | |
3996 | /* | |
3997 | * Got this far without error: | |
3998 | * If retval isn't in the threads database, add it. | |
3999 | */ | |
4000 | if (retval > 0 && | |
4001 | retval != inferior_pid && | |
4002 | !in_thread_list (retval)) | |
c906108c | 4003 | { |
c3f6f71d JM |
4004 | /* |
4005 | * We have a new thread. | |
4006 | * We need to add it both to GDB's list and to our own. | |
4007 | * If we don't create a procinfo, resume may be unhappy | |
4008 | * later. | |
4009 | */ | |
4010 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
4011 | add_thread (retval); | |
4012 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4013 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
4014 | ||
4015 | /* In addition, it's possible that this is the first | |
4016 | * new thread we've seen, in which case we may not | |
4017 | * have created entries for inferior_pid yet. | |
4018 | */ | |
4019 | if (TIDGET (inferior_pid) != 0) | |
4020 | { | |
4021 | if (!in_thread_list (inferior_pid)) | |
4022 | add_thread (inferior_pid); | |
4023 | if (find_procinfo (PIDGET (inferior_pid), | |
4024 | TIDGET (inferior_pid)) == NULL) | |
4025 | create_procinfo (PIDGET (inferior_pid), | |
4026 | TIDGET (inferior_pid)); | |
4027 | } | |
c906108c | 4028 | } |
c906108c | 4029 | } |
c3f6f71d | 4030 | else /* flags do not indicate STOPPED */ |
c906108c | 4031 | { |
c3f6f71d JM |
4032 | /* surely this can't happen... */ |
4033 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4034 | __LINE__); | |
4035 | proc_prettyprint_flags (flags, 1); | |
4036 | error ("procfs: ...giving up..."); | |
c906108c | 4037 | } |
c906108c | 4038 | } |
c906108c | 4039 | |
c3f6f71d JM |
4040 | if (status) |
4041 | store_waitstatus (status, wstat); | |
c906108c SS |
4042 | } |
4043 | ||
c3f6f71d JM |
4044 | return retval; |
4045 | } | |
c906108c | 4046 | |
c3f6f71d JM |
4047 | static int |
4048 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) | |
4049 | CORE_ADDR memaddr; | |
4050 | char *myaddr; | |
4051 | int len; | |
4052 | int dowrite; | |
4053 | struct target_ops *target; /* ignored */ | |
4054 | { | |
4055 | procinfo *pi; | |
4056 | int nbytes = 0; | |
c906108c | 4057 | |
c3f6f71d JM |
4058 | /* Find procinfo for main process */ |
4059 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4060 | if (pi->as_fd == 0 && | |
4061 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4062 | { |
c3f6f71d JM |
4063 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4064 | return 0; | |
c906108c | 4065 | } |
c906108c | 4066 | |
c3f6f71d | 4067 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4068 | { |
c3f6f71d | 4069 | if (dowrite) |
c906108c | 4070 | { |
c3f6f71d JM |
4071 | #ifdef NEW_PROC_API |
4072 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4073 | #else |
c3f6f71d | 4074 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4075 | #endif |
c3f6f71d | 4076 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4077 | } |
c3f6f71d | 4078 | else |
c906108c | 4079 | { |
c3f6f71d JM |
4080 | PROCFS_NOTE ("read memory: \n"); |
4081 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4082 | } |
c3f6f71d | 4083 | if (nbytes < 0) |
c906108c | 4084 | { |
c3f6f71d | 4085 | nbytes = 0; |
c906108c | 4086 | } |
c906108c | 4087 | } |
c3f6f71d | 4088 | return nbytes; |
c906108c SS |
4089 | } |
4090 | ||
4091 | /* | |
c3f6f71d JM |
4092 | * Function: invalidate_cache |
4093 | * | |
4094 | * Called by target_resume before making child runnable. | |
4095 | * Mark cached registers and status's invalid. | |
4096 | * If there are "dirty" caches that need to be written back | |
4097 | * to the child process, do that. | |
4098 | * | |
4099 | * File descriptors are also cached. | |
4100 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4101 | * However, as they are expensive to open, we don't want to throw them | |
4102 | * away indescriminately either. As a compromise, we will keep the | |
4103 | * file descriptors for the parent process, but discard any file | |
4104 | * descriptors we may have accumulated for the threads. | |
4105 | * | |
4106 | * Return value: | |
4107 | * As this function is called by iterate_over_threads, it always | |
4108 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
4109 | */ |
4110 | ||
c3f6f71d JM |
4111 | |
4112 | static int | |
4113 | invalidate_cache (parent, pi, ptr) | |
4114 | procinfo *parent; | |
4115 | procinfo *pi; | |
4116 | void *ptr; | |
c906108c | 4117 | { |
c3f6f71d JM |
4118 | /* |
4119 | * About to run the child; invalidate caches and do any other cleanup. | |
4120 | */ | |
c906108c | 4121 | |
c3f6f71d JM |
4122 | #if 0 |
4123 | if (pi->gregs_dirty) | |
4124 | if (parent == NULL || | |
4125 | proc_get_current_thread (parent) != pi->tid) | |
4126 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4127 | proc_warn (pi, "target_resume, set_gregs", | |
4128 | __LINE__); | |
60054393 MS |
4129 | if (FP0_REGNUM >= 0) |
4130 | if (pi->fpregs_dirty) | |
4131 | if (parent == NULL || | |
4132 | proc_get_current_thread (parent) != pi->tid) | |
4133 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4134 | proc_warn (pi, "target_resume, set_fpregs", | |
4135 | __LINE__); | |
c906108c | 4136 | #endif |
c906108c | 4137 | |
c3f6f71d | 4138 | if (parent != NULL) |
c906108c | 4139 | { |
c3f6f71d JM |
4140 | /* The presence of a parent indicates that this is an LWP. |
4141 | Close any file descriptors that it might have open. | |
4142 | We don't do this to the master (parent) procinfo. */ | |
4143 | ||
4144 | close_procinfo_files (pi); | |
c906108c | 4145 | } |
c3f6f71d JM |
4146 | pi->gregs_valid = 0; |
4147 | pi->fpregs_valid = 0; | |
4148 | #if 0 | |
4149 | pi->gregs_dirty = 0; | |
4150 | pi->fpregs_dirty = 0; | |
c906108c | 4151 | #endif |
c3f6f71d JM |
4152 | pi->status_valid = 0; |
4153 | pi->threads_valid = 0; | |
c906108c | 4154 | |
c3f6f71d | 4155 | return 0; |
c906108c SS |
4156 | } |
4157 | ||
0fda6bd2 | 4158 | #if 0 |
c906108c | 4159 | /* |
c3f6f71d JM |
4160 | * Function: make_signal_thread_runnable |
4161 | * | |
4162 | * A callback function for iterate_over_threads. | |
4163 | * Find the asynchronous signal thread, and make it runnable. | |
4164 | * See if that helps matters any. | |
c906108c SS |
4165 | */ |
4166 | ||
c3f6f71d JM |
4167 | static int |
4168 | make_signal_thread_runnable (process, pi, ptr) | |
4169 | procinfo *process; | |
4170 | procinfo *pi; | |
4171 | void *ptr; | |
c906108c | 4172 | { |
c3f6f71d JM |
4173 | #ifdef PR_ASLWP |
4174 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4175 | { |
c3f6f71d JM |
4176 | if (!proc_run_process (pi, 0, -1)) |
4177 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4178 | return 1; | |
c906108c | 4179 | } |
c906108c | 4180 | #endif |
c3f6f71d | 4181 | return 0; |
c906108c | 4182 | } |
0fda6bd2 | 4183 | #endif |
c906108c SS |
4184 | |
4185 | /* | |
c3f6f71d JM |
4186 | * Function: target_resume |
4187 | * | |
4188 | * Make the child process runnable. Normally we will then call | |
4189 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4190 | * | |
4191 | * Arguments: | |
4192 | * step: if true, then arrange for the child to stop again | |
4193 | * after executing a single instruction. | |
4194 | * signo: if zero, then cancel any pending signal. | |
4195 | * If non-zero, then arrange for the indicated signal | |
4196 | * to be delivered to the child when it runs. | |
4197 | * pid: if -1, then allow any child thread to run. | |
4198 | * if non-zero, then allow only the indicated thread to run. | |
4199 | ******* (not implemented yet) | |
c906108c SS |
4200 | */ |
4201 | ||
4202 | static void | |
c3f6f71d JM |
4203 | procfs_resume (pid, step, signo) |
4204 | int pid; | |
4205 | int step; | |
4206 | enum target_signal signo; | |
c906108c | 4207 | { |
c3f6f71d JM |
4208 | procinfo *pi, *thread; |
4209 | int native_signo; | |
4210 | ||
4211 | /* 2.1: | |
4212 | prrun.prflags |= PRSVADDR; | |
4213 | prrun.pr_vaddr = $PC; set resume address | |
4214 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4215 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4216 | prrun.prflags |= PRCFAULT; clear current fault. | |
4217 | ||
4218 | PRSTRACE and PRSFAULT can be done by other means | |
4219 | (proc_trace_signals, proc_trace_faults) | |
4220 | PRSVADDR is unnecessary. | |
4221 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4222 | This basically leaves PRSTEP and PRCSIG. | |
4223 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4224 | So basically PR_STEP is the sole argument that must be passed | |
4225 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4226 | ||
4227 | /* Find procinfo for main process */ | |
4228 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4229 | ||
4230 | /* First cut: ignore pid argument */ | |
4231 | errno = 0; | |
c906108c | 4232 | |
c3f6f71d JM |
4233 | /* Convert signal to host numbering. */ |
4234 | if (signo == 0 || | |
0fda6bd2 | 4235 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4236 | native_signo = 0; |
4237 | else | |
4238 | native_signo = target_signal_to_host (signo); | |
c906108c | 4239 | |
c3f6f71d | 4240 | pi->ignore_next_sigstop = 0; |
c906108c | 4241 | |
c3f6f71d JM |
4242 | /* Running the process voids all cached registers and status. */ |
4243 | /* Void the threads' caches first */ | |
4244 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4245 | /* Void the process procinfo's caches. */ | |
4246 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4247 | |
c3f6f71d | 4248 | if (pid != -1) |
c906108c | 4249 | { |
c3f6f71d JM |
4250 | /* Resume a specific thread, presumably suppressing the others. */ |
4251 | thread = find_procinfo (PIDGET (pid), TIDGET (pid)); | |
4252 | if (thread == NULL) | |
4253 | warning ("procfs: resume can't find thread %d -- resuming all.", | |
4254 | TIDGET (pid)); | |
4255 | else | |
c906108c | 4256 | { |
c3f6f71d JM |
4257 | if (thread->tid != 0) |
4258 | { | |
4259 | /* We're to resume a specific thread, and not the others. | |
4260 | * Set the child process's PR_ASYNC flag. | |
4261 | */ | |
4262 | #ifdef PR_ASYNC | |
4263 | if (!proc_set_async (pi)) | |
4264 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4265 | #endif | |
4266 | #if 0 | |
4267 | proc_iterate_over_threads (pi, | |
4268 | make_signal_thread_runnable, | |
4269 | NULL); | |
4270 | #endif | |
4271 | pi = thread; /* substitute the thread's procinfo for run */ | |
4272 | } | |
c906108c SS |
4273 | } |
4274 | } | |
c906108c | 4275 | |
c3f6f71d | 4276 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4277 | { |
c3f6f71d JM |
4278 | if (errno == EBUSY) |
4279 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4280 | else | |
4281 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4282 | } |
c3f6f71d | 4283 | } |
c906108c | 4284 | |
c3f6f71d JM |
4285 | /* |
4286 | * Function: register_gdb_signals | |
4287 | * | |
4288 | * Traverse the list of signals that GDB knows about | |
4289 | * (see "handle" command), and arrange for the target | |
4290 | * to be stopped or not, according to these settings. | |
4291 | * | |
4292 | * Returns non-zero for success, zero for failure. | |
4293 | */ | |
c906108c | 4294 | |
c3f6f71d JM |
4295 | static int |
4296 | register_gdb_signals (pi, signals) | |
4297 | procinfo *pi; | |
4298 | sigset_t *signals; | |
4299 | { | |
4300 | int signo; | |
c906108c | 4301 | |
c3f6f71d JM |
4302 | for (signo = 0; signo < NSIG; signo ++) |
4303 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4304 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4305 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4306 | prdelset (signals, signo); | |
4307 | else | |
4308 | praddset (signals, signo); | |
c906108c | 4309 | |
c3f6f71d | 4310 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4311 | } |
4312 | ||
4313 | /* | |
c3f6f71d JM |
4314 | * Function: target_notice_signals |
4315 | * | |
4316 | * Set up to trace signals in the child process. | |
4317 | */ | |
c906108c | 4318 | |
c3f6f71d JM |
4319 | static void |
4320 | procfs_notice_signals (pid) | |
4321 | int pid; | |
4322 | { | |
4323 | sigset_t signals; | |
4324 | procinfo *pi = find_procinfo_or_die (PIDGET (pid), 0); | |
c906108c | 4325 | |
c3f6f71d JM |
4326 | if (proc_get_traced_signals (pi, &signals) && |
4327 | register_gdb_signals (pi, &signals)) | |
4328 | return; | |
4329 | else | |
4330 | proc_error (pi, "notice_signals", __LINE__); | |
4331 | } | |
c906108c | 4332 | |
c3f6f71d JM |
4333 | /* |
4334 | * Function: target_files_info | |
4335 | * | |
4336 | * Print status information about the child process. | |
4337 | */ | |
c906108c | 4338 | |
c3f6f71d JM |
4339 | static void |
4340 | procfs_files_info (ignore) | |
4341 | struct target_ops *ignore; | |
4342 | { | |
4343 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4344 | attach_flag? "attached": "child", | |
4345 | target_pid_to_str (inferior_pid)); | |
4346 | } | |
c906108c | 4347 | |
c3f6f71d JM |
4348 | /* |
4349 | * Function: target_open | |
4350 | * | |
4351 | * A dummy: you don't open procfs. | |
c906108c SS |
4352 | */ |
4353 | ||
4354 | static void | |
c3f6f71d JM |
4355 | procfs_open (args, from_tty) |
4356 | char *args; | |
4357 | int from_tty; | |
c906108c | 4358 | { |
c3f6f71d JM |
4359 | error ("Use the \"run\" command to start a Unix child process."); |
4360 | } | |
c906108c | 4361 | |
c3f6f71d JM |
4362 | /* |
4363 | * Function: target_can_run | |
4364 | * | |
4365 | * This tells GDB that this target vector can be invoked | |
4366 | * for "run" or "attach". | |
4367 | */ | |
c906108c | 4368 | |
c3f6f71d JM |
4369 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4370 | be a runnable target. Used by targets | |
4371 | that can sit atop procfs, such as solaris | |
4372 | thread support. */ | |
c906108c | 4373 | |
c906108c | 4374 | |
c3f6f71d JM |
4375 | static int |
4376 | procfs_can_run () | |
4377 | { | |
4378 | /* This variable is controlled by modules that sit atop procfs that | |
4379 | may layer their own process structure atop that provided here. | |
4380 | sol-thread.c does this because of the Solaris two-level thread | |
4381 | model. */ | |
4382 | ||
4383 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4384 | |
c3f6f71d JM |
4385 | return !procfs_suppress_run; |
4386 | } | |
c906108c | 4387 | |
c3f6f71d JM |
4388 | /* |
4389 | * Function: target_stop | |
4390 | * | |
4391 | * Stop the child process asynchronously, as when the | |
4392 | * gdb user types control-c or presses a "stop" button. | |
4393 | * | |
4394 | * Works by sending kill(SIGINT) to the child's process group. | |
4395 | */ | |
c906108c | 4396 | |
c3f6f71d JM |
4397 | static void |
4398 | procfs_stop () | |
4399 | { | |
4400 | extern pid_t inferior_process_group; | |
c906108c | 4401 | |
c3f6f71d | 4402 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4403 | } |
4404 | ||
c906108c | 4405 | /* |
c3f6f71d JM |
4406 | * Function: unconditionally_kill_inferior |
4407 | * | |
4408 | * Make it die. Wait for it to die. Clean up after it. | |
4409 | * Note: this should only be applied to the real process, | |
4410 | * not to an LWP, because of the check for parent-process. | |
4411 | * If we need this to work for an LWP, it needs some more logic. | |
4412 | */ | |
c906108c | 4413 | |
c3f6f71d JM |
4414 | static void |
4415 | unconditionally_kill_inferior (pi) | |
4416 | procinfo *pi; | |
4417 | { | |
4418 | int parent_pid; | |
c906108c | 4419 | |
c3f6f71d JM |
4420 | parent_pid = proc_parent_pid (pi); |
4421 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4422 | /* FIXME: use access functions */ | |
4423 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4424 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4425 | file for the inferior. */ | |
4426 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4427 | { | |
4428 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4429 | } | |
4430 | #endif | |
4431 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4432 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4433 | to kill the inferior, otherwise it might remain stopped with a | |
4434 | pending SIGKILL. | |
4435 | We do not check the result of the PIOCSSIG, the inferior might have | |
4436 | died already. */ | |
4437 | { | |
4438 | struct siginfo newsiginfo; | |
c906108c | 4439 | |
c3f6f71d JM |
4440 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4441 | newsiginfo.si_signo = SIGKILL; | |
4442 | newsiginfo.si_code = 0; | |
4443 | newsiginfo.si_errno = 0; | |
4444 | newsiginfo.si_pid = getpid (); | |
4445 | newsiginfo.si_uid = getuid (); | |
4446 | /* FIXME: use proc_set_current_signal */ | |
4447 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4448 | } | |
4449 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4450 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4451 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4452 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4453 | destroy_procinfo (pi); | |
c906108c | 4454 | |
c3f6f71d JM |
4455 | /* If pi is GDB's child, wait for it to die. */ |
4456 | if (parent_pid == getpid ()) | |
4457 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4458 | Should we check the returned event? */ | |
4459 | { | |
0d06e24b | 4460 | #if 0 |
c3f6f71d | 4461 | int status, ret; |
c906108c | 4462 | |
c3f6f71d JM |
4463 | ret = waitpid (pi->pid, &status, 0); |
4464 | #else | |
4465 | wait (NULL); | |
4466 | #endif | |
4467 | } | |
4468 | } | |
c906108c | 4469 | |
c3f6f71d JM |
4470 | /* |
4471 | * Function: target_kill_inferior | |
4472 | * | |
4473 | * We're done debugging it, and we want it to go away. | |
4474 | * Then we want GDB to forget all about it. | |
c906108c SS |
4475 | */ |
4476 | ||
c3f6f71d JM |
4477 | static void |
4478 | procfs_kill_inferior () | |
c906108c | 4479 | { |
c3f6f71d JM |
4480 | if (inferior_pid != 0) /* ? */ |
4481 | { | |
4482 | /* Find procinfo for main process */ | |
4483 | procinfo *pi = find_procinfo (PIDGET (inferior_pid), 0); | |
c906108c | 4484 | |
c3f6f71d JM |
4485 | if (pi) |
4486 | unconditionally_kill_inferior (pi); | |
4487 | target_mourn_inferior (); | |
c906108c | 4488 | } |
c3f6f71d JM |
4489 | } |
4490 | ||
4491 | /* | |
4492 | * Function: target_mourn_inferior | |
4493 | * | |
4494 | * Forget we ever debugged this thing! | |
4495 | */ | |
c906108c | 4496 | |
c3f6f71d JM |
4497 | static void |
4498 | procfs_mourn_inferior () | |
4499 | { | |
4500 | procinfo *pi; | |
c906108c | 4501 | |
c3f6f71d JM |
4502 | if (inferior_pid != 0) |
4503 | { | |
4504 | /* Find procinfo for main process */ | |
4505 | pi = find_procinfo (PIDGET (inferior_pid), 0); | |
4506 | if (pi) | |
4507 | destroy_procinfo (pi); | |
c906108c | 4508 | } |
c3f6f71d JM |
4509 | unpush_target (&procfs_ops); |
4510 | generic_mourn_inferior (); | |
4511 | } | |
c906108c | 4512 | |
c3f6f71d JM |
4513 | /* |
4514 | * Function: init_inferior | |
4515 | * | |
4516 | * When GDB forks to create a runnable inferior process, | |
4517 | * this function is called on the parent side of the fork. | |
4518 | * It's job is to do whatever is necessary to make the child | |
4519 | * ready to be debugged, and then wait for the child to synchronize. | |
4520 | */ | |
c906108c | 4521 | |
c3f6f71d JM |
4522 | static void |
4523 | procfs_init_inferior (pid) | |
4524 | int pid; | |
4525 | { | |
4526 | procinfo *pi; | |
4527 | sigset_t signals; | |
4528 | int fail; | |
c906108c | 4529 | |
c3f6f71d JM |
4530 | /* This routine called on the parent side (GDB side) |
4531 | after GDB forks the inferior. */ | |
c906108c | 4532 | |
c3f6f71d | 4533 | push_target (&procfs_ops); |
c906108c | 4534 | |
c3f6f71d JM |
4535 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4536 | perror ("procfs: out of memory in 'init_inferior'"); | |
4537 | ||
4538 | if (!open_procinfo_files (pi, FD_CTL)) | |
4539 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4540 | ||
4541 | /* | |
4542 | xmalloc // done | |
4543 | open_procinfo_files // done | |
4544 | link list // done | |
4545 | prfillset (trace) | |
4546 | procfs_notice_signals | |
4547 | prfillset (fault) | |
4548 | prdelset (FLTPAGE) | |
4549 | PIOCWSTOP | |
4550 | PIOCSFAULT | |
4551 | */ | |
4552 | ||
4553 | /* If not stopped yet, wait for it to stop. */ | |
4554 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4555 | !(proc_wait_for_stop (pi))) | |
4556 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4557 | ||
4558 | /* Save some of the /proc state to be restored if we detach. */ | |
4559 | /* FIXME: Why? In case another debugger was debugging it? | |
4560 | We're it's parent, for Ghu's sake! */ | |
4561 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4562 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4563 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4564 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4565 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4566 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
4567 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
4568 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); | |
4569 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
4570 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); | |
4571 | ||
4572 | /* Register to trace selected signals in the child. */ | |
4573 | prfillset (&signals); | |
4574 | if (!register_gdb_signals (pi, &signals)) | |
4575 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4576 | ||
4577 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4578 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4579 | ||
0d06e24b JM |
4580 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4581 | and possibly even turning ON kill-on-last-close at this point. But | |
4582 | I can't make that change without careful testing which I don't have | |
4583 | time to do right now... */ | |
c3f6f71d JM |
4584 | /* Turn on run-on-last-close flag so that the child |
4585 | will die if GDB goes away for some reason. */ | |
4586 | if (!proc_set_run_on_last_close (pi)) | |
4587 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4588 | ||
4589 | /* The 'process ID' we return to GDB is composed of | |
4590 | the actual process ID plus the lwp ID. */ | |
4591 | inferior_pid = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c | 4592 | |
c3f6f71d JM |
4593 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4594 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4595 | #else | |
4596 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4597 | startup_inferior (2); | |
0d06e24b | 4598 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4599 | } |
c906108c | 4600 | |
c3f6f71d JM |
4601 | /* |
4602 | * Function: set_exec_trap | |
4603 | * | |
4604 | * When GDB forks to create a new process, this function is called | |
4605 | * on the child side of the fork before GDB exec's the user program. | |
4606 | * Its job is to make the child minimally debuggable, so that the | |
4607 | * parent GDB process can connect to the child and take over. | |
4608 | * This function should do only the minimum to make that possible, | |
4609 | * and to synchronize with the parent process. The parent process | |
4610 | * should take care of the details. | |
4611 | */ | |
4612 | ||
4613 | static void | |
4614 | procfs_set_exec_trap () | |
4615 | { | |
4616 | /* This routine called on the child side (inferior side) | |
4617 | after GDB forks the inferior. It must use only local variables, | |
4618 | because it may be sharing data space with its parent. */ | |
c906108c | 4619 | |
c3f6f71d JM |
4620 | procinfo *pi; |
4621 | sysset_t exitset; | |
c906108c | 4622 | |
c3f6f71d JM |
4623 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4624 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4625 | |
c3f6f71d JM |
4626 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4627 | { | |
4628 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4629 | gdb_flush (gdb_stderr); | |
4630 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4631 | _exit (127); | |
4632 | } | |
c906108c | 4633 | |
c3f6f71d JM |
4634 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4635 | /* OSF method for tracing exec syscalls. Quoting: | |
4636 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4637 | exits from exec system calls because of the user level loader. */ | |
4638 | /* FIXME: make nice and maybe move into an access function. */ | |
4639 | { | |
4640 | int prfs_flags; | |
c906108c | 4641 | |
c3f6f71d JM |
4642 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4643 | { | |
4644 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4645 | gdb_flush (gdb_stderr); | |
4646 | _exit (127); | |
4647 | } | |
4648 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4649 | |
c3f6f71d JM |
4650 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4651 | { | |
4652 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4653 | gdb_flush (gdb_stderr); | |
4654 | _exit (127); | |
4655 | } | |
4656 | } | |
4657 | #else /* not PRFS_STOPEXEC */ | |
4658 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4659 | /* GW: Rationale... | |
4660 | Not all systems with /proc have all the exec* syscalls with the same | |
4661 | names. On the SGI, for example, there is no SYS_exec, but there | |
4662 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4663 | |
c3f6f71d JM |
4664 | premptyset (&exitset); |
4665 | #ifdef SYS_exec | |
4666 | praddset (&exitset, SYS_exec); | |
4667 | #endif | |
4668 | #ifdef SYS_execve | |
4669 | praddset (&exitset, SYS_execve); | |
4670 | #endif | |
4671 | #ifdef SYS_execv | |
4672 | praddset (&exitset, SYS_execv); | |
c906108c | 4673 | #endif |
c906108c | 4674 | |
c3f6f71d | 4675 | if (!proc_set_traced_sysexit (pi, &exitset)) |
c906108c | 4676 | { |
c3f6f71d JM |
4677 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4678 | gdb_flush (gdb_stderr); | |
4679 | _exit (127); | |
c906108c | 4680 | } |
c3f6f71d JM |
4681 | #endif /* PRFS_STOPEXEC */ |
4682 | ||
4683 | /* FIXME: should this be done in the parent instead? */ | |
4684 | /* Turn off inherit on fork flag so that all grand-children | |
4685 | of gdb start with tracing flags cleared. */ | |
4686 | if (!proc_unset_inherit_on_fork (pi)) | |
4687 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4688 | ||
4689 | /* Turn off run on last close flag, so that the child process | |
4690 | cannot run away just because we close our handle on it. | |
4691 | We want it to wait for the parent to attach. */ | |
4692 | if (!proc_unset_run_on_last_close (pi)) | |
4693 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4694 | ||
4695 | /* FIXME: No need to destroy the procinfo -- | |
4696 | we have our own address space, and we're about to do an exec! */ | |
4697 | /*destroy_procinfo (pi);*/ | |
c906108c | 4698 | } |
c906108c | 4699 | |
c3f6f71d JM |
4700 | /* |
4701 | * Function: create_inferior | |
4702 | * | |
4703 | * This function is called BEFORE gdb forks the inferior process. | |
4704 | * Its only real responsibility is to set things up for the fork, | |
4705 | * and tell GDB which two functions to call after the fork (one | |
4706 | * for the parent, and one for the child). | |
4707 | * | |
4708 | * This function does a complicated search for a unix shell program, | |
4709 | * which it then uses to parse arguments and environment variables | |
4710 | * to be sent to the child. I wonder whether this code could not | |
4711 | * be abstracted out and shared with other unix targets such as | |
4712 | * infptrace? | |
4713 | */ | |
c906108c SS |
4714 | |
4715 | static void | |
4716 | procfs_create_inferior (exec_file, allargs, env) | |
4717 | char *exec_file; | |
4718 | char *allargs; | |
4719 | char **env; | |
4720 | { | |
4721 | char *shell_file = getenv ("SHELL"); | |
4722 | char *tryname; | |
4723 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4724 | { | |
4725 | ||
4726 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4727 | just do this the normal way (via execlp, which operates by |
4728 | attempting an exec for each element of the PATH until it | |
4729 | finds one which succeeds), then there will be an exec for | |
4730 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4731 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4732 | for these failed execs with the ones for successful execs | |
4733 | (whether the exec has succeeded is stored at that time in the | |
4734 | carry bit or some such architecture-specific and | |
4735 | non-ABI-specified place). | |
4736 | ||
4737 | So I can't think of anything better than to search the PATH | |
4738 | now. This has several disadvantages: (1) There is a race | |
4739 | condition; if we find a file now and it is deleted before we | |
4740 | exec it, we lose, even if the deletion leaves a valid file | |
4741 | further down in the PATH, (2) there is no way to know exactly | |
4742 | what an executable (in the sense of "capable of being | |
4743 | exec'd") file is. Using access() loses because it may lose | |
4744 | if the caller is the superuser; failing to use it loses if | |
4745 | there are ACLs or some such. */ | |
c906108c SS |
4746 | |
4747 | char *p; | |
4748 | char *p1; | |
4749 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4750 | path is used from within GDB. */ |
c906108c SS |
4751 | char *path = getenv ("PATH"); |
4752 | int len; | |
4753 | struct stat statbuf; | |
4754 | ||
4755 | if (path == NULL) | |
4756 | path = "/bin:/usr/bin"; | |
4757 | ||
4758 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4759 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4760 | { |
4761 | p1 = strchr (p, ':'); | |
4762 | if (p1 != NULL) | |
4763 | len = p1 - p; | |
4764 | else | |
4765 | len = strlen (p); | |
4766 | strncpy (tryname, p, len); | |
4767 | tryname[len] = '\0'; | |
4768 | strcat (tryname, "/"); | |
4769 | strcat (tryname, shell_file); | |
4770 | if (access (tryname, X_OK) < 0) | |
4771 | continue; | |
4772 | if (stat (tryname, &statbuf) < 0) | |
4773 | continue; | |
4774 | if (!S_ISREG (statbuf.st_mode)) | |
4775 | /* We certainly need to reject directories. I'm not quite | |
4776 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4777 | that people want to exec() these things. */ | |
4778 | continue; | |
4779 | break; | |
4780 | } | |
4781 | if (p == NULL) | |
4782 | /* Not found. This must be an error rather than merely passing | |
4783 | the file to execlp(), because execlp() would try all the | |
4784 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
4785 | error ("procfs:%d -- Can't find shell %s in PATH", |
4786 | __LINE__, shell_file); | |
c906108c SS |
4787 | |
4788 | shell_file = tryname; | |
4789 | } | |
4790 | ||
c3f6f71d JM |
4791 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4792 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
4793 | |
4794 | /* We are at the first instruction we care about. */ | |
4795 | /* Pedal to the metal... */ | |
4796 | ||
2acceee2 | 4797 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
4798 | } |
4799 | ||
c3f6f71d JM |
4800 | /* |
4801 | * Function: notice_thread | |
4802 | * | |
4803 | * Callback for find_new_threads. | |
4804 | * Calls "add_thread". | |
4805 | */ | |
c906108c | 4806 | |
c3f6f71d JM |
4807 | static int |
4808 | procfs_notice_thread (pi, thread, ptr) | |
4809 | procinfo *pi; | |
4810 | procinfo *thread; | |
4811 | void *ptr; | |
c906108c | 4812 | { |
c3f6f71d | 4813 | int gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4814 | |
c3f6f71d JM |
4815 | if (!in_thread_list (gdb_threadid)) |
4816 | add_thread (gdb_threadid); | |
c906108c | 4817 | |
c3f6f71d JM |
4818 | return 0; |
4819 | } | |
4820 | ||
4821 | /* | |
4822 | * Function: target_find_new_threads | |
4823 | * | |
4824 | * Query all the threads that the target knows about, | |
4825 | * and give them back to GDB to add to its list. | |
4826 | */ | |
4827 | ||
4828 | void | |
4829 | procfs_find_new_threads () | |
4830 | { | |
4831 | procinfo *pi; | |
4832 | ||
4833 | /* Find procinfo for main process */ | |
4834 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4835 | proc_update_threads (pi); | |
4836 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4837 | } |
4838 | ||
c3f6f71d JM |
4839 | /* |
4840 | * Function: target_thread_alive | |
4841 | * | |
4842 | * Return true if the thread is still 'alive'. | |
4843 | * | |
4844 | * This guy doesn't really seem to be doing his job. | |
4845 | * Got to investigate how to tell when a thread is really gone. | |
4846 | */ | |
c906108c | 4847 | |
c906108c | 4848 | static int |
c3f6f71d JM |
4849 | procfs_thread_alive (pid) |
4850 | int pid; | |
c906108c | 4851 | { |
c3f6f71d JM |
4852 | int proc, thread; |
4853 | procinfo *pi; | |
c906108c | 4854 | |
c3f6f71d JM |
4855 | proc = PIDGET (pid); |
4856 | thread = TIDGET (pid); | |
4857 | /* If I don't know it, it ain't alive! */ | |
4858 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
4859 | return 0; | |
4860 | ||
4861 | /* If I can't get its status, it ain't alive! | |
4862 | What's more, I need to forget about it! */ | |
4863 | if (!proc_get_status (pi)) | |
4864 | { | |
4865 | destroy_procinfo (pi); | |
4866 | return 0; | |
4867 | } | |
4868 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
4869 | return 1; | |
c906108c | 4870 | } |
c3f6f71d JM |
4871 | |
4872 | /* | |
4873 | * Function: target_pid_to_str | |
4874 | * | |
4875 | * Return a string to be used to identify the thread in | |
4876 | * the "info threads" display. | |
4877 | */ | |
4878 | ||
4879 | char * | |
4880 | procfs_pid_to_str (pid) | |
c5aa993b | 4881 | int pid; |
c3f6f71d JM |
4882 | { |
4883 | static char buf[80]; | |
4884 | int proc, thread; | |
4885 | procinfo *pi; | |
4886 | ||
4887 | proc = PIDGET (pid); | |
4888 | thread = TIDGET (pid); | |
4889 | pi = find_procinfo (proc, thread); | |
4890 | ||
4891 | if (thread == 0) | |
4892 | sprintf (buf, "Process %d", proc); | |
4893 | else | |
4894 | sprintf (buf, "LWP %d", thread); | |
4895 | return &buf[0]; | |
4896 | } | |
4897 | ||
4898 | /* | |
4899 | * Function: procfs_set_watchpoint | |
4900 | * Insert a watchpoint | |
4901 | */ | |
4902 | ||
4903 | int | |
4904 | procfs_set_watchpoint (pid, addr, len, rwflag, after) | |
4905 | int pid; | |
c5aa993b | 4906 | CORE_ADDR addr; |
c3f6f71d JM |
4907 | int len; |
4908 | int rwflag; | |
4909 | int after; | |
c906108c | 4910 | { |
c3f6f71d JM |
4911 | #ifndef UNIXWARE |
4912 | int pflags = 0; | |
4913 | procinfo *pi; | |
4914 | ||
4915 | pi = find_procinfo_or_die (pid == -1 ? | |
4916 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4917 | ||
4918 | /* Translate from GDB's flags to /proc's */ | |
4919 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 4920 | { |
c3f6f71d JM |
4921 | switch (rwflag) { /* FIXME: need an enum! */ |
4922 | case hw_write: /* default watchpoint (write) */ | |
4923 | pflags = WRITE_WATCHFLAG; | |
4924 | break; | |
4925 | case hw_read: /* read watchpoint */ | |
4926 | pflags = READ_WATCHFLAG; | |
4927 | break; | |
4928 | case hw_access: /* access watchpoint */ | |
4929 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4930 | break; | |
4931 | case hw_execute: /* execution HW breakpoint */ | |
4932 | pflags = EXEC_WATCHFLAG; | |
4933 | break; | |
4934 | default: /* Something weird. Return error. */ | |
c906108c | 4935 | return -1; |
c3f6f71d JM |
4936 | } |
4937 | if (after) /* Stop after r/w access is completed. */ | |
4938 | pflags |= AFTER_WATCHFLAG; | |
4939 | } | |
4940 | ||
4941 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4942 | { | |
4943 | if (errno == E2BIG) /* Typical error for no resources */ | |
4944 | return -1; /* fail */ | |
4945 | /* GDB may try to remove the same watchpoint twice. | |
4946 | If a remove request returns no match, don't error. */ | |
c906108c | 4947 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4948 | return 0; /* ignore */ |
4949 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4950 | } |
c3f6f71d | 4951 | #endif |
c906108c SS |
4952 | return 0; |
4953 | } | |
4954 | ||
c3f6f71d JM |
4955 | /* |
4956 | * Function: stopped_by_watchpoint | |
4957 | * | |
4958 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
4959 | * else returns zero. | |
4960 | */ | |
4961 | ||
c906108c | 4962 | int |
c5aa993b | 4963 | procfs_stopped_by_watchpoint (pid) |
c3f6f71d | 4964 | int pid; |
c906108c | 4965 | { |
c3f6f71d | 4966 | procinfo *pi; |
c906108c | 4967 | |
c3f6f71d JM |
4968 | pi = find_procinfo_or_die (pid == -1 ? |
4969 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4970 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 4971 | { |
c3f6f71d JM |
4972 | if (proc_why (pi) == PR_FAULTED) |
4973 | { | |
c906108c | 4974 | #ifdef FLTWATCH |
c3f6f71d JM |
4975 | if (proc_what (pi) == FLTWATCH) |
4976 | return 1; | |
c906108c SS |
4977 | #endif |
4978 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4979 | if (proc_what (pi) == FLTKWATCH) |
4980 | return 1; | |
c906108c | 4981 | #endif |
c3f6f71d | 4982 | } |
c906108c SS |
4983 | } |
4984 | return 0; | |
4985 | } | |
c906108c | 4986 | |
c3f6f71d JM |
4987 | #ifdef TM_I386SOL2_H |
4988 | /* | |
4989 | * Function: procfs_find_LDT_entry | |
4990 | * | |
4991 | * Input: | |
4992 | * int pid; // The GDB-style pid-plus-LWP. | |
4993 | * | |
4994 | * Return: | |
4995 | * pointer to the corresponding LDT entry. | |
4996 | */ | |
c906108c | 4997 | |
c3f6f71d JM |
4998 | struct ssd * |
4999 | procfs_find_LDT_entry (pid) | |
c906108c SS |
5000 | int pid; |
5001 | { | |
c3f6f71d JM |
5002 | gdb_gregset_t *gregs; |
5003 | int key; | |
5004 | procinfo *pi; | |
c906108c | 5005 | |
c3f6f71d JM |
5006 | /* Find procinfo for the lwp. */ |
5007 | if ((pi = find_procinfo (PIDGET (pid), TIDGET (pid))) == NULL) | |
c906108c | 5008 | { |
c3f6f71d JM |
5009 | warning ("procfs_find_LDT_entry: could not find procinfi for %d.", |
5010 | pid); | |
5011 | return NULL; | |
c906108c | 5012 | } |
c3f6f71d JM |
5013 | /* get its general registers. */ |
5014 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
5015 | { | |
5016 | warning ("procfs_find_LDT_entry: could not read gregs for %d.", | |
5017 | pid); | |
5018 | return NULL; | |
5019 | } | |
5020 | /* Now extract the GS register's lower 16 bits. */ | |
5021 | key = (*gregs)[GS] & 0xffff; | |
5022 | ||
5023 | /* Find the matching entry and return it. */ | |
5024 | return proc_get_LDT_entry (pi, key); | |
c906108c | 5025 | } |
c3f6f71d | 5026 | #endif /* TM_I386SOL2_H */ |
c906108c | 5027 | |
c3f6f71d JM |
5028 | |
5029 | ||
5030 | static void | |
5031 | info_proc_cmd (args, from_tty) | |
5032 | char *args; | |
5033 | int from_tty; | |
c906108c | 5034 | { |
c3f6f71d JM |
5035 | struct cleanup *old_chain; |
5036 | procinfo *process = NULL; | |
5037 | procinfo *thread = NULL; | |
5038 | char **argv = NULL; | |
5039 | char *tmp = NULL; | |
5040 | int pid = 0; | |
5041 | int tid = 0; | |
c906108c | 5042 | |
c3f6f71d JM |
5043 | old_chain = make_cleanup (null_cleanup, 0); |
5044 | if (args) | |
0fda6bd2 JM |
5045 | { |
5046 | if ((argv = buildargv (args)) == NULL) | |
5047 | nomem (0); | |
5048 | else | |
004527cb | 5049 | make_cleanup_freeargv (argv); |
0fda6bd2 | 5050 | } |
c3f6f71d JM |
5051 | while (argv != NULL && *argv != NULL) |
5052 | { | |
5053 | if (isdigit (argv[0][0])) | |
5054 | { | |
5055 | pid = strtoul (argv[0], &tmp, 10); | |
5056 | if (*tmp == '/') | |
5057 | tid = strtoul (++tmp, NULL, 10); | |
5058 | } | |
5059 | else if (argv[0][0] == '/') | |
5060 | { | |
5061 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5062 | } | |
5063 | else | |
5064 | { | |
5065 | /* [...] */ | |
5066 | } | |
5067 | argv++; | |
5068 | } | |
5069 | if (pid == 0) | |
5070 | pid = PIDGET (inferior_pid); | |
5071 | if (pid == 0) | |
5072 | error ("No current process: you must name one."); | |
5073 | else | |
c906108c | 5074 | { |
c3f6f71d JM |
5075 | /* Have pid, will travel. |
5076 | First see if it's a process we're already debugging. */ | |
5077 | process = find_procinfo (pid, 0); | |
5078 | if (process == NULL) | |
5079 | { | |
5080 | /* No. So open a procinfo for it, but | |
5081 | remember to close it again when finished. */ | |
5082 | process = create_procinfo (pid, 0); | |
004527cb | 5083 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5084 | if (!open_procinfo_files (process, FD_CTL)) |
5085 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5086 | } | |
c906108c | 5087 | } |
c3f6f71d JM |
5088 | if (tid != 0) |
5089 | thread = create_procinfo (pid, tid); | |
5090 | ||
5091 | if (process) | |
5092 | { | |
5093 | printf_filtered ("process %d flags:\n", process->pid); | |
5094 | proc_prettyprint_flags (proc_flags (process), 1); | |
5095 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5096 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5097 | if (proc_get_nthreads (process) > 1) | |
5098 | printf_filtered ("Process has %d threads.\n", | |
5099 | proc_get_nthreads (process)); | |
5100 | } | |
5101 | if (thread) | |
5102 | { | |
5103 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5104 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5105 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5106 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5107 | } | |
5108 | ||
5109 | do_cleanups (old_chain); | |
c906108c SS |
5110 | } |
5111 | ||
c3f6f71d JM |
5112 | static void |
5113 | proc_trace_syscalls (args, from_tty, entry_or_exit, mode) | |
5114 | char *args; | |
5115 | int from_tty; | |
5116 | int entry_or_exit; | |
5117 | int mode; | |
c906108c | 5118 | { |
c3f6f71d JM |
5119 | procinfo *pi; |
5120 | sysset_t *sysset; | |
5121 | int syscallnum = 0; | |
c906108c | 5122 | |
c3f6f71d JM |
5123 | if (inferior_pid <= 0) |
5124 | error ("you must be debugging a process to use this command."); | |
c906108c | 5125 | |
c3f6f71d JM |
5126 | if (args == NULL || args[0] == 0) |
5127 | error_no_arg ("system call to trace"); | |
5128 | ||
5129 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
5130 | if (isdigit (args[0])) | |
5131 | { | |
5132 | syscallnum = atoi (args); | |
5133 | if (entry_or_exit == PR_SYSENTRY) | |
5134 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5135 | else | |
5136 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5137 | |
c3f6f71d JM |
5138 | if (sysset == NULL) |
5139 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5140 | |
c3f6f71d JM |
5141 | if (mode == FLAG_SET) |
5142 | praddset (sysset, syscallnum); | |
5143 | else | |
5144 | prdelset (sysset, syscallnum); | |
c906108c | 5145 | |
c3f6f71d JM |
5146 | if (entry_or_exit == PR_SYSENTRY) |
5147 | { | |
5148 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5149 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5150 | } | |
5151 | else | |
5152 | { | |
5153 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5154 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5155 | } | |
5156 | } | |
5157 | } | |
5158 | ||
5159 | static void | |
5160 | proc_trace_sysentry_cmd (args, from_tty) | |
5161 | char *args; | |
5162 | int from_tty; | |
c906108c | 5163 | { |
c3f6f71d JM |
5164 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5165 | } | |
c906108c | 5166 | |
c3f6f71d JM |
5167 | static void |
5168 | proc_trace_sysexit_cmd (args, from_tty) | |
5169 | char *args; | |
5170 | int from_tty; | |
5171 | { | |
5172 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5173 | } |
c906108c | 5174 | |
c3f6f71d JM |
5175 | static void |
5176 | proc_untrace_sysentry_cmd (args, from_tty) | |
5177 | char *args; | |
5178 | int from_tty; | |
5179 | { | |
5180 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5181 | } | |
5182 | ||
5183 | static void | |
5184 | proc_untrace_sysexit_cmd (args, from_tty) | |
5185 | char *args; | |
5186 | int from_tty; | |
c906108c | 5187 | { |
c3f6f71d JM |
5188 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5189 | } | |
c906108c | 5190 | |
c906108c | 5191 | |
c906108c SS |
5192 | void |
5193 | _initialize_procfs () | |
5194 | { | |
c906108c SS |
5195 | init_procfs_ops (); |
5196 | add_target (&procfs_ops); | |
c3f6f71d JM |
5197 | add_info ("proc", info_proc_cmd, |
5198 | "Show /proc process information about any running process.\ | |
5199 | Default is the process being debugged."); | |
5200 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, | |
5201 | "Give a trace of entries into the syscall."); | |
5202 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5203 | "Give a trace of exits from the syscall."); | |
5204 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5205 | "Cancel a trace of entries into the syscall."); | |
5206 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5207 | "Cancel a trace of exits from the syscall."); | |
c3f6f71d JM |
5208 | } |
5209 | ||
5210 | /* =================== END, GDB "MODULE" =================== */ | |
5211 | ||
5212 | ||
5213 | ||
5214 | /* miscelaneous stubs: */ | |
5215 | /* The following satisfy a few random symbols mostly created by */ | |
5216 | /* the solaris threads implementation, which I will chase down */ | |
5217 | /* later. */ | |
5218 | ||
5219 | /* | |
5220 | * Return a pid for which we guarantee | |
5221 | * we will be able to find a 'live' procinfo. | |
5222 | */ | |
5223 | ||
5224 | int | |
5225 | procfs_first_available () | |
5226 | { | |
5227 | if (procinfo_list) | |
5228 | return procinfo_list->pid; | |
5229 | else | |
5230 | return -1; | |
5231 | } |