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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
4b14d3e4 | 2 | Copyright 1999-2000 Free Software Foundation, Inc. |
c3f6f71d JM |
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> |
4b14d3e4 | 79 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 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 | ||
c60c0f5f MS |
92 | /* Prototypes for supply_gregset etc. */ |
93 | #include "gregset.h" | |
94 | ||
c3f6f71d | 95 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 96 | |
c3f6f71d JM |
97 | /* |
98 | * This module defines the GDB target vector and its methods. | |
99 | */ | |
c906108c | 100 | |
c3f6f71d JM |
101 | static void procfs_open PARAMS((char *, int)); |
102 | static void procfs_attach PARAMS ((char *, int)); | |
103 | static void procfs_detach PARAMS ((char *, int)); | |
104 | static void procfs_resume PARAMS ((int, int, enum target_signal)); | |
105 | static int procfs_can_run PARAMS ((void)); | |
106 | static void procfs_stop PARAMS ((void)); | |
107 | static void procfs_files_info PARAMS ((struct target_ops *)); | |
108 | static void procfs_fetch_registers PARAMS ((int)); | |
109 | static void procfs_store_registers PARAMS ((int)); | |
110 | static void procfs_notice_signals PARAMS ((int)); | |
111 | static void procfs_prepare_to_store PARAMS ((void)); | |
112 | static void procfs_kill_inferior PARAMS ((void)); | |
113 | static void procfs_mourn_inferior PARAMS ((void)); | |
114 | static void procfs_create_inferior PARAMS ((char *, char *, char **)); | |
115 | static int procfs_wait PARAMS ((int, | |
116 | struct target_waitstatus *)); | |
117 | static int procfs_xfer_memory PARAMS ((CORE_ADDR, | |
118 | char *, int, int, | |
119 | struct target_ops *)); | |
120 | ||
121 | static int procfs_thread_alive PARAMS ((int)); | |
122 | ||
123 | void procfs_find_new_threads PARAMS ((void)); | |
124 | char *procfs_pid_to_str PARAMS ((int)); | |
125 | ||
126 | struct target_ops procfs_ops; /* the target vector */ | |
c906108c | 127 | |
c3f6f71d JM |
128 | static void |
129 | init_procfs_ops () | |
130 | { | |
131 | procfs_ops.to_shortname = "procfs"; | |
132 | procfs_ops.to_longname = "Unix /proc child process"; | |
133 | procfs_ops.to_doc = | |
134 | "Unix /proc child process (started by the \"run\" command)."; | |
135 | procfs_ops.to_open = procfs_open; | |
136 | procfs_ops.to_can_run = procfs_can_run; | |
137 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
138 | procfs_ops.to_kill = procfs_kill_inferior; | |
139 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
140 | procfs_ops.to_attach = procfs_attach; | |
141 | procfs_ops.to_detach = procfs_detach; | |
142 | procfs_ops.to_wait = procfs_wait; | |
143 | procfs_ops.to_resume = procfs_resume; | |
144 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
145 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
146 | procfs_ops.to_store_registers = procfs_store_registers; | |
147 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
148 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
149 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
150 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
151 | procfs_ops.to_files_info = procfs_files_info; | |
152 | procfs_ops.to_stop = procfs_stop; | |
153 | ||
154 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
155 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
156 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
157 | procfs_ops.to_terminal_ours = terminal_ours; | |
158 | procfs_ops.to_terminal_info = child_terminal_info; | |
159 | ||
160 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
161 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
162 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
163 | ||
103b3ef5 MS |
164 | procfs_ops.to_has_all_memory = 1; |
165 | procfs_ops.to_has_memory = 1; | |
c3f6f71d JM |
166 | procfs_ops.to_has_execution = 1; |
167 | procfs_ops.to_has_stack = 1; | |
168 | procfs_ops.to_has_registers = 1; | |
169 | procfs_ops.to_stratum = process_stratum; | |
170 | procfs_ops.to_has_thread_control = tc_schedlock; | |
171 | procfs_ops.to_magic = OPS_MAGIC; | |
172 | } | |
c906108c | 173 | |
c3f6f71d JM |
174 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
175 | ||
c3f6f71d JM |
176 | /* |
177 | * World Unification: | |
178 | * | |
179 | * Put any typedefs, defines etc. here that are required for | |
180 | * the unification of code that handles different versions of /proc. | |
181 | */ | |
182 | ||
183 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
184 | #ifndef UNIXWARE | |
185 | enum { READ_WATCHFLAG = WA_READ, | |
186 | WRITE_WATCHFLAG = WA_WRITE, | |
187 | EXEC_WATCHFLAG = WA_EXEC, | |
188 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
189 | }; | |
190 | #endif | |
191 | #else /* Irix method for watchpoints */ | |
192 | enum { READ_WATCHFLAG = MA_READ, | |
193 | WRITE_WATCHFLAG = MA_WRITE, | |
194 | EXEC_WATCHFLAG = MA_EXEC, | |
195 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
196 | }; | |
197 | #endif | |
198 | ||
199 | ||
200 | ||
201 | ||
202 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
203 | ||
204 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
205 | ||
206 | /* The procinfo struct is a wrapper to hold all the state information | |
207 | concerning a /proc process. There should be exactly one procinfo | |
208 | for each process, and since GDB currently can debug only one | |
209 | process at a time, that means there should be only one procinfo. | |
210 | All of the LWP's of a process can be accessed indirectly thru the | |
211 | single process procinfo. | |
212 | ||
213 | However, against the day when GDB may debug more than one process, | |
214 | this data structure is kept in a list (which for now will hold no | |
215 | more than one member), and many functions will have a pointer to a | |
216 | procinfo as an argument. | |
217 | ||
218 | There will be a separate procinfo structure for use by the (not yet | |
219 | implemented) "info proc" command, so that we can print useful | |
220 | information about any random process without interfering with the | |
221 | inferior's procinfo information. */ | |
222 | ||
223 | #ifdef NEW_PROC_API | |
224 | /* format strings for /proc paths */ | |
225 | # ifndef CTL_PROC_NAME_FMT | |
226 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
227 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
228 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
229 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
230 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
231 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
232 | # endif | |
233 | /* the name of the proc status struct depends on the implementation */ | |
234 | typedef pstatus_t gdb_prstatus_t; | |
235 | typedef lwpstatus_t gdb_lwpstatus_t; | |
236 | #else /* ! NEW_PROC_API */ | |
237 | /* format strings for /proc paths */ | |
238 | # ifndef CTL_PROC_NAME_FMT | |
239 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
240 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
241 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
242 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
243 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
244 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
245 | # endif | |
c906108c | 246 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 247 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
248 | typedef prstatus_t gdb_lwpstatus_t; |
249 | #endif /* NEW_PROC_API */ | |
c906108c | 250 | |
0d06e24b JM |
251 | /* Provide default composite pid manipulation macros for systems that |
252 | don't have threads. */ | |
c906108c | 253 | |
c3f6f71d | 254 | #ifndef PIDGET |
0d06e24b JM |
255 | #define PIDGET(PID) (PID) |
256 | #define TIDGET(PID) (PID) | |
eeefac92 AC |
257 | #endif |
258 | #ifndef MERGEPID | |
0d06e24b | 259 | #define MERGEPID(PID, TID) (PID) |
c906108c SS |
260 | #endif |
261 | ||
c3f6f71d JM |
262 | typedef struct procinfo { |
263 | struct procinfo *next; | |
264 | int pid; /* Process ID */ | |
265 | int tid; /* Thread/LWP id */ | |
c906108c | 266 | |
c3f6f71d JM |
267 | /* process state */ |
268 | int was_stopped; | |
269 | int ignore_next_sigstop; | |
c906108c | 270 | |
c3f6f71d JM |
271 | /* The following four fd fields may be identical, or may contain |
272 | several different fd's, depending on the version of /proc | |
273 | (old ioctl or new read/write). */ | |
c906108c | 274 | |
c3f6f71d JM |
275 | int ctl_fd; /* File descriptor for /proc control file */ |
276 | /* | |
277 | * The next three file descriptors are actually only needed in the | |
278 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
279 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
280 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
281 | * implementation) filling them with copies of the control fd. | |
282 | */ | |
283 | int status_fd; /* File descriptor for /proc status file */ | |
284 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 285 | |
c3f6f71d | 286 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 287 | |
c3f6f71d JM |
288 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
289 | sigset_t saved_sigset; /* Saved traced signal set */ | |
290 | sigset_t saved_sighold; /* Saved held signal set */ | |
291 | sysset_t saved_exitset; /* Saved traced system call exit set */ | |
292 | sysset_t saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 293 | |
c3f6f71d | 294 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 295 | |
c3f6f71d JM |
296 | #ifndef NEW_PROC_API |
297 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 298 | #endif |
c3f6f71d JM |
299 | |
300 | struct procinfo *thread_list; | |
c906108c | 301 | |
c3f6f71d JM |
302 | int status_valid : 1; |
303 | int gregs_valid : 1; | |
304 | int fpregs_valid : 1; | |
305 | int threads_valid: 1; | |
306 | } procinfo; | |
c906108c | 307 | |
c3f6f71d | 308 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 309 | |
c3f6f71d | 310 | /* Function prototypes for procinfo module: */ |
c906108c | 311 | |
c3f6f71d JM |
312 | static procinfo *find_procinfo_or_die PARAMS ((int pid, int tid)); |
313 | static procinfo *find_procinfo PARAMS ((int pid, int tid)); | |
314 | static procinfo *create_procinfo PARAMS ((int pid, int tid)); | |
315 | static void destroy_procinfo PARAMS ((procinfo *p)); | |
004527cb | 316 | static void do_destroy_procinfo_cleanup (void *); |
c3f6f71d JM |
317 | static void dead_procinfo PARAMS ((procinfo *p, |
318 | char *msg, int killp)); | |
319 | static int open_procinfo_files PARAMS ((procinfo *p, int which)); | |
320 | static void close_procinfo_files PARAMS ((procinfo *p)); | |
c906108c | 321 | |
c3f6f71d JM |
322 | /* The head of the procinfo list: */ |
323 | static procinfo * procinfo_list; | |
c906108c | 324 | |
c3f6f71d JM |
325 | /* |
326 | * Function: find_procinfo | |
327 | * | |
328 | * Search the procinfo list. | |
329 | * | |
330 | * Returns: pointer to procinfo, or NULL if not found. | |
331 | */ | |
c906108c | 332 | |
c3f6f71d JM |
333 | static procinfo * |
334 | find_procinfo (pid, tid) | |
335 | int pid; | |
336 | int tid; | |
c5aa993b | 337 | { |
c3f6f71d | 338 | procinfo *pi; |
c906108c | 339 | |
c3f6f71d JM |
340 | for (pi = procinfo_list; pi; pi = pi->next) |
341 | if (pi->pid == pid) | |
342 | break; | |
c906108c | 343 | |
c3f6f71d JM |
344 | if (pi) |
345 | if (tid) | |
346 | { | |
347 | /* Don't check threads_valid. If we're updating the | |
348 | thread_list, we want to find whatever threads are already | |
349 | here. This means that in general it is the caller's | |
350 | responsibility to check threads_valid and update before | |
351 | calling find_procinfo, if the caller wants to find a new | |
352 | thread. */ | |
353 | ||
354 | for (pi = pi->thread_list; pi; pi = pi->next) | |
355 | if (pi->tid == tid) | |
356 | break; | |
357 | } | |
c906108c | 358 | |
c3f6f71d JM |
359 | return pi; |
360 | } | |
c906108c | 361 | |
c3f6f71d JM |
362 | /* |
363 | * Function: find_procinfo_or_die | |
364 | * | |
365 | * Calls find_procinfo, but errors on failure. | |
366 | */ | |
c906108c | 367 | |
c3f6f71d JM |
368 | static procinfo * |
369 | find_procinfo_or_die (pid, tid) | |
370 | int pid; | |
371 | int tid; | |
372 | { | |
373 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 374 | |
c3f6f71d | 375 | if (pi == NULL) |
0fda6bd2 JM |
376 | { |
377 | if (tid) | |
378 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
379 | pid, tid); | |
380 | else | |
381 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
382 | } | |
c3f6f71d JM |
383 | return pi; |
384 | } | |
c906108c | 385 | |
c3f6f71d JM |
386 | /* |
387 | * Function: open_procinfo_files | |
388 | * | |
389 | * Open the file descriptor for the process or LWP. | |
390 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
391 | * the others are opened lazily as needed. | |
392 | * else (if not NEW_PROC_API), there is only one real | |
393 | * file descriptor, but we keep multiple copies of it so that | |
394 | * the code that uses them does not have to be #ifdef'd. | |
395 | * | |
396 | * Return: file descriptor, or zero for failure. | |
397 | */ | |
c906108c | 398 | |
c3f6f71d | 399 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 400 | |
c3f6f71d JM |
401 | static int |
402 | open_procinfo_files (pi, which) | |
403 | procinfo *pi; | |
404 | int which; | |
405 | { | |
0fda6bd2 | 406 | #ifdef NEW_PROC_API |
c3f6f71d | 407 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 408 | #endif |
c3f6f71d JM |
409 | int fd; |
410 | ||
411 | /* | |
412 | * This function is getting ALMOST long enough to break up into several. | |
413 | * Here is some rationale: | |
414 | * | |
415 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
416 | * There are several file descriptors that may need to be open | |
417 | * for any given process or LWP. The ones we're intereted in are: | |
418 | * - control (ctl) write-only change the state | |
419 | * - status (status) read-only query the state | |
420 | * - address space (as) read/write access memory | |
421 | * - map (map) read-only virtual addr map | |
422 | * Most of these are opened lazily as they are needed. | |
423 | * The pathnames for the 'files' for an LWP look slightly | |
424 | * different from those of a first-class process: | |
425 | * Pathnames for a process (<proc-id>): | |
426 | * /proc/<proc-id>/ctl | |
427 | * /proc/<proc-id>/status | |
428 | * /proc/<proc-id>/as | |
429 | * /proc/<proc-id>/map | |
430 | * Pathnames for an LWP (lwp-id): | |
431 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
432 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
433 | * An LWP has no map or address space file descriptor, since | |
434 | * the memory map and address space are shared by all LWPs. | |
435 | * | |
436 | * Everyone else (Solaris 2.5, Irix, OSF) | |
437 | * There is only one file descriptor for each process or LWP. | |
438 | * For convenience, we copy the same file descriptor into all | |
439 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
440 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
441 | * doesn't need any #ifdef's. | |
442 | * Pathname for all: | |
443 | * /proc/<proc-id> | |
444 | * | |
445 | * Solaris 2.5 LWP's: | |
446 | * Each LWP has an independent file descriptor, but these | |
447 | * are not obtained via the 'open' system call like the rest: | |
448 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
449 | * to the file descriptor of the parent process. | |
450 | * | |
451 | * OSF threads: | |
452 | * These do not even have their own independent file descriptor. | |
453 | * All operations are carried out on the file descriptor of the | |
454 | * parent process. Therefore we just call open again for each | |
455 | * thread, getting a new handle for the same 'file'. | |
456 | */ | |
457 | ||
458 | #ifdef NEW_PROC_API | |
459 | /* | |
460 | * In this case, there are several different file descriptors that | |
461 | * we might be asked to open. The control file descriptor will be | |
462 | * opened early, but the others will be opened lazily as they are | |
463 | * needed. | |
464 | */ | |
465 | ||
466 | strcpy (tmp, pi->pathname); | |
467 | switch (which) { /* which file descriptor to open? */ | |
468 | case FD_CTL: | |
469 | if (pi->tid) | |
470 | strcat (tmp, "/lwpctl"); | |
471 | else | |
472 | strcat (tmp, "/ctl"); | |
473 | fd = open (tmp, O_WRONLY); | |
474 | if (fd <= 0) | |
475 | return 0; /* fail */ | |
476 | pi->ctl_fd = fd; | |
477 | break; | |
478 | case FD_AS: | |
479 | if (pi->tid) | |
480 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
481 | strcat (tmp, "/as"); | |
482 | fd = open (tmp, O_RDWR); | |
483 | if (fd <= 0) | |
484 | return 0; /* fail */ | |
485 | pi->as_fd = fd; | |
486 | break; | |
487 | case FD_STATUS: | |
488 | if (pi->tid) | |
489 | strcat (tmp, "/lwpstatus"); | |
490 | else | |
491 | strcat (tmp, "/status"); | |
492 | fd = open (tmp, O_RDONLY); | |
493 | if (fd <= 0) | |
494 | return 0; /* fail */ | |
495 | pi->status_fd = fd; | |
496 | break; | |
497 | default: | |
498 | return 0; /* unknown file descriptor */ | |
499 | } | |
500 | #else /* not NEW_PROC_API */ | |
501 | /* | |
502 | * In this case, there is only one file descriptor for each procinfo | |
503 | * (ie. each process or LWP). In fact, only the file descriptor for | |
504 | * the process can actually be opened by an 'open' system call. | |
505 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
506 | * on the process's file descriptor. | |
507 | * | |
508 | * For convenience, we copy each procinfo's single file descriptor | |
509 | * into all of the fields occupied by the several file descriptors | |
510 | * of the NEW_PROC_API implementation. That way, the code that uses | |
511 | * them can be written without ifdefs. | |
512 | */ | |
513 | ||
514 | ||
515 | #ifdef PIOCTSTATUS /* OSF */ | |
516 | if ((fd = open (pi->pathname, O_RDWR)) == 0) /* Only one FD; just open it. */ | |
517 | return 0; | |
518 | #else /* Sol 2.5, Irix, other? */ | |
519 | if (pi->tid == 0) /* Master procinfo for the process */ | |
520 | { | |
521 | fd = open (pi->pathname, O_RDWR); | |
522 | if (fd <= 0) | |
523 | return 0; /* fail */ | |
524 | } | |
525 | else /* LWP thread procinfo */ | |
526 | { | |
527 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
528 | procinfo *process; | |
529 | int lwpid = pi->tid; | |
530 | ||
531 | /* Find the procinfo for the entire process. */ | |
532 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
533 | return 0; /* fail */ | |
534 | ||
535 | /* Now obtain the file descriptor for the LWP. */ | |
536 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
537 | return 0; /* fail */ | |
538 | #else /* Irix, other? */ | |
539 | return 0; /* Don't know how to open threads */ | |
540 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
541 | } | |
542 | #endif /* OSF PIOCTSTATUS */ | |
543 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
544 | #endif /* NEW_PROC_API */ | |
c906108c | 545 | |
c3f6f71d JM |
546 | return 1; /* success */ |
547 | } | |
c906108c | 548 | |
c3f6f71d JM |
549 | /* |
550 | * Function: create_procinfo | |
551 | * | |
552 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 553 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
554 | * |
555 | * Return: pointer to new procinfo struct. | |
556 | */ | |
c906108c | 557 | |
c3f6f71d JM |
558 | static procinfo * |
559 | create_procinfo (pid, tid) | |
560 | int pid; | |
561 | int tid; | |
562 | { | |
563 | procinfo *pi, *parent; | |
c906108c | 564 | |
0d06e24b | 565 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 566 | return pi; /* Already exists, nothing to do. */ |
c906108c | 567 | |
c3f6f71d JM |
568 | /* find parent before doing malloc, to save having to cleanup */ |
569 | if (tid != 0) | |
570 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
571 | create it if it | |
572 | doesn't exist yet? */ | |
c906108c | 573 | |
c3f6f71d JM |
574 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
575 | memset (pi, 0, sizeof (procinfo)); | |
576 | pi->pid = pid; | |
577 | pi->tid = tid; | |
c906108c | 578 | |
c3f6f71d JM |
579 | /* Chain into list. */ |
580 | if (tid == 0) | |
581 | { | |
582 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
583 | pi->next = procinfo_list; | |
584 | procinfo_list = pi; | |
585 | } | |
586 | else | |
587 | { | |
588 | #ifdef NEW_PROC_API | |
589 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
590 | #else | |
591 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
592 | #endif | |
593 | pi->next = parent->thread_list; | |
594 | parent->thread_list = pi; | |
595 | } | |
596 | return pi; | |
597 | } | |
c906108c | 598 | |
c3f6f71d JM |
599 | /* |
600 | * Function: close_procinfo_files | |
601 | * | |
602 | * Close all file descriptors associated with the procinfo | |
603 | */ | |
c906108c | 604 | |
c3f6f71d JM |
605 | static void |
606 | close_procinfo_files (pi) | |
607 | procinfo *pi; | |
608 | { | |
609 | if (pi->ctl_fd > 0) | |
610 | close (pi->ctl_fd); | |
611 | #ifdef NEW_PROC_API | |
612 | if (pi->as_fd > 0) | |
613 | close (pi->as_fd); | |
614 | if (pi->status_fd > 0) | |
615 | close (pi->status_fd); | |
616 | #endif | |
617 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
618 | } | |
c906108c | 619 | |
c3f6f71d JM |
620 | /* |
621 | * Function: destroy_procinfo | |
622 | * | |
623 | * Destructor function. Close, unlink and deallocate the object. | |
624 | */ | |
c906108c | 625 | |
c3f6f71d JM |
626 | static void |
627 | destroy_one_procinfo (list, pi) | |
628 | procinfo **list; | |
629 | procinfo *pi; | |
630 | { | |
631 | procinfo *ptr; | |
632 | ||
633 | /* Step one: unlink the procinfo from its list */ | |
634 | if (pi == *list) | |
635 | *list = pi->next; | |
636 | else | |
637 | for (ptr = *list; ptr; ptr = ptr->next) | |
638 | if (ptr->next == pi) | |
639 | { | |
640 | ptr->next = pi->next; | |
641 | break; | |
642 | } | |
7a292a7a | 643 | |
c3f6f71d JM |
644 | /* Step two: close any open file descriptors */ |
645 | close_procinfo_files (pi); | |
7a292a7a | 646 | |
c3f6f71d JM |
647 | /* Step three: free the memory. */ |
648 | free (pi); | |
649 | } | |
c906108c | 650 | |
c3f6f71d JM |
651 | static void |
652 | destroy_procinfo (pi) | |
653 | procinfo *pi; | |
654 | { | |
655 | procinfo *tmp; | |
c906108c | 656 | |
c3f6f71d JM |
657 | if (pi->tid != 0) /* destroy a thread procinfo */ |
658 | { | |
659 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
660 | destroy_one_procinfo (&tmp->thread_list, pi); | |
661 | } | |
662 | else /* destroy a process procinfo and all its threads */ | |
663 | { | |
664 | /* First destroy the children, if any; */ | |
665 | while (pi->thread_list != NULL) | |
666 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
667 | /* Then destroy the parent. Genocide!!! */ | |
668 | destroy_one_procinfo (&procinfo_list, pi); | |
669 | } | |
670 | } | |
c906108c | 671 | |
004527cb AC |
672 | static void |
673 | do_destroy_procinfo_cleanup (void *pi) | |
674 | { | |
675 | destroy_procinfo (pi); | |
676 | } | |
677 | ||
c3f6f71d | 678 | enum { NOKILL, KILL }; |
c906108c | 679 | |
c3f6f71d JM |
680 | /* |
681 | * Function: dead_procinfo | |
682 | * | |
683 | * To be called on a non_recoverable error for a procinfo. | |
684 | * Prints error messages, optionally sends a SIGKILL to the process, | |
685 | * then destroys the data structure. | |
686 | */ | |
c906108c | 687 | |
c3f6f71d JM |
688 | static void |
689 | dead_procinfo (pi, msg, kill_p) | |
690 | procinfo *pi; | |
691 | char *msg; | |
692 | int kill_p; | |
693 | { | |
694 | char procfile[80]; | |
c906108c | 695 | |
c3f6f71d JM |
696 | if (pi->pathname) |
697 | { | |
698 | print_sys_errmsg (pi->pathname, errno); | |
699 | } | |
700 | else | |
701 | { | |
702 | sprintf (procfile, "process %d", pi->pid); | |
703 | print_sys_errmsg (procfile, errno); | |
704 | } | |
705 | if (kill_p == KILL) | |
706 | kill (pi->pid, SIGKILL); | |
c906108c | 707 | |
c3f6f71d JM |
708 | destroy_procinfo (pi); |
709 | error (msg); | |
710 | } | |
c906108c | 711 | |
c3f6f71d | 712 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 713 | |
c3f6f71d | 714 | /* =================== /proc "MODULE" =================== */ |
c906108c | 715 | |
c3f6f71d JM |
716 | /* |
717 | * This "module" is the interface layer between the /proc system API | |
718 | * and the gdb target vector functions. This layer consists of | |
719 | * access functions that encapsulate each of the basic operations | |
720 | * that we need to use from the /proc API. | |
721 | * | |
722 | * The main motivation for this layer is to hide the fact that | |
723 | * there are two very different implementations of the /proc API. | |
724 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
725 | * functions, we do our best to hide them all in here. | |
726 | */ | |
c906108c | 727 | |
c3f6f71d JM |
728 | int proc_get_status PARAMS ((procinfo *pi)); |
729 | long proc_flags PARAMS ((procinfo *pi)); | |
730 | int proc_why PARAMS ((procinfo *pi)); | |
731 | int proc_what PARAMS ((procinfo *pi)); | |
732 | int proc_set_run_on_last_close PARAMS ((procinfo *pi)); | |
733 | int proc_unset_run_on_last_close PARAMS ((procinfo *pi)); | |
734 | int proc_set_inherit_on_fork PARAMS ((procinfo *pi)); | |
735 | int proc_unset_inherit_on_fork PARAMS ((procinfo *pi)); | |
736 | int proc_set_async PARAMS ((procinfo *pi)); | |
737 | int proc_unset_async PARAMS ((procinfo *pi)); | |
738 | int proc_stop_process PARAMS ((procinfo *pi)); | |
739 | int proc_trace_signal PARAMS ((procinfo *pi, int signo)); | |
740 | int proc_ignore_signal PARAMS ((procinfo *pi, int signo)); | |
741 | int proc_clear_current_fault PARAMS ((procinfo *pi)); | |
742 | int proc_set_current_signal PARAMS ((procinfo *pi, int signo)); | |
743 | int proc_clear_current_signal PARAMS ((procinfo *pi)); | |
744 | int proc_set_gregs PARAMS ((procinfo *pi)); | |
745 | int proc_set_fpregs PARAMS ((procinfo *pi)); | |
746 | int proc_wait_for_stop PARAMS ((procinfo *pi)); | |
747 | int proc_run_process PARAMS ((procinfo *pi, int step, int signo)); | |
748 | int proc_kill PARAMS ((procinfo *pi, int signo)); | |
749 | int proc_parent_pid PARAMS ((procinfo *pi)); | |
750 | int proc_get_nthreads PARAMS ((procinfo *pi)); | |
751 | int proc_get_current_thread PARAMS ((procinfo *pi)); | |
752 | int proc_set_held_signals PARAMS ((procinfo *pi, sigset_t *sighold)); | |
753 | int proc_set_traced_sysexit PARAMS ((procinfo *pi, sysset_t *sysset)); | |
754 | int proc_set_traced_sysentry PARAMS ((procinfo *pi, sysset_t *sysset)); | |
755 | int proc_set_traced_faults PARAMS ((procinfo *pi, fltset_t *fltset)); | |
756 | int proc_set_traced_signals PARAMS ((procinfo *pi, sigset_t *sigset)); | |
757 | ||
758 | int proc_update_threads PARAMS ((procinfo *pi)); | |
759 | int proc_iterate_over_threads PARAMS ((procinfo *pi, | |
760 | int (*func) PARAMS ((procinfo *, | |
761 | procinfo *, | |
762 | void *)), | |
763 | void *ptr)); | |
764 | ||
765 | gdb_gregset_t *proc_get_gregs PARAMS ((procinfo *pi)); | |
766 | gdb_fpregset_t *proc_get_fpregs PARAMS ((procinfo *pi)); | |
767 | sysset_t *proc_get_traced_sysexit PARAMS ((procinfo *pi, sysset_t *save)); | |
768 | sysset_t *proc_get_traced_sysentry PARAMS ((procinfo *pi, sysset_t *save)); | |
769 | fltset_t *proc_get_traced_faults PARAMS ((procinfo *pi, fltset_t *save)); | |
770 | sigset_t *proc_get_traced_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
771 | sigset_t *proc_get_held_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
772 | sigset_t *proc_get_pending_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
773 | struct sigaction *proc_get_signal_actions PARAMS ((procinfo *pi, | |
774 | struct sigaction *save)); | |
775 | ||
776 | void proc_warn PARAMS ((procinfo *pi, char *func, int line)); | |
777 | void proc_error PARAMS ((procinfo *pi, char *func, int line)); | |
c906108c | 778 | |
c3f6f71d JM |
779 | void |
780 | proc_warn (pi, func, line) | |
781 | procinfo *pi; | |
782 | char *func; | |
783 | int line; | |
784 | { | |
785 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
786 | print_sys_errmsg (errmsg, errno); | |
787 | } | |
c906108c | 788 | |
c3f6f71d JM |
789 | void |
790 | proc_error (pi, func, line) | |
791 | procinfo *pi; | |
792 | char *func; | |
793 | int line; | |
794 | { | |
795 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
796 | perror_with_name (errmsg); | |
797 | } | |
c906108c | 798 | |
c3f6f71d JM |
799 | /* |
800 | * Function: proc_get_status | |
801 | * | |
802 | * Updates the status struct in the procinfo. | |
803 | * There is a 'valid' flag, to let other functions know when | |
804 | * this function needs to be called (so the status is only | |
805 | * read when it is needed). The status file descriptor is | |
806 | * also only opened when it is needed. | |
807 | * | |
808 | * Return: non-zero for success, zero for failure. | |
809 | */ | |
c906108c | 810 | |
c3f6f71d JM |
811 | int |
812 | proc_get_status (pi) | |
813 | procinfo *pi; | |
814 | { | |
815 | /* Status file descriptor is opened "lazily" */ | |
816 | if (pi->status_fd == 0 && | |
817 | open_procinfo_files (pi, FD_STATUS) == 0) | |
818 | { | |
819 | pi->status_valid = 0; | |
820 | return 0; | |
821 | } | |
c906108c | 822 | |
c3f6f71d JM |
823 | #ifdef NEW_PROC_API |
824 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
825 | pi->status_valid = 0; /* fail */ | |
826 | else | |
827 | { | |
828 | /* Sigh... I have to read a different data structure, | |
829 | depending on whether this is a main process or an LWP. */ | |
830 | if (pi->tid) | |
831 | pi->status_valid = (read (pi->status_fd, | |
832 | (char *) &pi->prstatus.pr_lwp, | |
833 | sizeof (lwpstatus_t)) | |
834 | == sizeof (lwpstatus_t)); | |
835 | else | |
836 | { | |
837 | pi->status_valid = (read (pi->status_fd, | |
838 | (char *) &pi->prstatus, | |
839 | sizeof (gdb_prstatus_t)) | |
840 | == sizeof (gdb_prstatus_t)); | |
841 | #if 0 /*def UNIXWARE*/ | |
842 | if (pi->status_valid && | |
843 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
844 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
845 | /* Unixware peculiarity -- read the damn thing again! */ | |
846 | pi->status_valid = (read (pi->status_fd, | |
847 | (char *) &pi->prstatus, | |
848 | sizeof (gdb_prstatus_t)) | |
849 | == sizeof (gdb_prstatus_t)); | |
850 | #endif /* UNIXWARE */ | |
851 | } | |
852 | } | |
853 | #else /* ioctl method */ | |
854 | #ifdef PIOCTSTATUS /* osf */ | |
855 | if (pi->tid == 0) /* main process */ | |
856 | { | |
857 | /* Just read the danged status. Now isn't that simple? */ | |
858 | pi->status_valid = | |
859 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
860 | } | |
861 | else | |
862 | { | |
863 | int win; | |
864 | struct { | |
865 | long pr_count; | |
866 | tid_t pr_error_thread; | |
867 | struct prstatus status; | |
868 | } thread_status; | |
869 | ||
870 | thread_status.pr_count = 1; | |
871 | thread_status.status.pr_tid = pi->tid; | |
872 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
873 | if (win) | |
874 | { | |
875 | memcpy (&pi->prstatus, &thread_status.status, | |
876 | sizeof (pi->prstatus)); | |
877 | pi->status_valid = 1; | |
878 | } | |
879 | } | |
880 | #else | |
881 | /* Just read the danged status. Now isn't that simple? */ | |
882 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
883 | #endif | |
884 | #endif | |
c906108c | 885 | |
c3f6f71d JM |
886 | if (pi->status_valid) |
887 | { | |
888 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
889 | proc_why (pi), | |
890 | proc_what (pi), | |
891 | proc_get_current_thread (pi)); | |
892 | } | |
c906108c | 893 | |
c3f6f71d JM |
894 | /* The status struct includes general regs, so mark them valid too */ |
895 | pi->gregs_valid = pi->status_valid; | |
896 | #ifdef NEW_PROC_API | |
897 | /* In the read/write multiple-fd model, | |
898 | the status struct includes the fp regs too, so mark them valid too */ | |
899 | pi->fpregs_valid = pi->status_valid; | |
900 | #endif | |
901 | return pi->status_valid; /* True if success, false if failure. */ | |
902 | } | |
c906108c | 903 | |
c3f6f71d JM |
904 | /* |
905 | * Function: proc_flags | |
906 | * | |
907 | * returns the process flags (pr_flags field). | |
908 | */ | |
909 | ||
910 | long | |
911 | proc_flags (pi) | |
912 | procinfo *pi; | |
913 | { | |
914 | if (!pi->status_valid) | |
915 | if (!proc_get_status (pi)) | |
916 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 917 | |
c3f6f71d | 918 | #ifdef NEW_PROC_API |
0d06e24b JM |
919 | # ifdef UNIXWARE |
920 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
921 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
922 | The two sets of flags don't overlap. */ | |
923 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
924 | # else | |
c3f6f71d | 925 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 926 | # endif |
c3f6f71d JM |
927 | #else |
928 | return pi->prstatus.pr_flags; | |
929 | #endif | |
930 | } | |
c906108c | 931 | |
c3f6f71d JM |
932 | /* |
933 | * Function: proc_why | |
934 | * | |
935 | * returns the pr_why field (why the process stopped). | |
936 | */ | |
c906108c | 937 | |
c3f6f71d JM |
938 | int |
939 | proc_why (pi) | |
940 | procinfo *pi; | |
941 | { | |
942 | if (!pi->status_valid) | |
943 | if (!proc_get_status (pi)) | |
944 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 945 | |
c3f6f71d JM |
946 | #ifdef NEW_PROC_API |
947 | return pi->prstatus.pr_lwp.pr_why; | |
948 | #else | |
949 | return pi->prstatus.pr_why; | |
950 | #endif | |
951 | } | |
c906108c | 952 | |
c3f6f71d JM |
953 | /* |
954 | * Function: proc_what | |
955 | * | |
956 | * returns the pr_what field (details of why the process stopped). | |
957 | */ | |
c906108c | 958 | |
c3f6f71d JM |
959 | int |
960 | proc_what (pi) | |
961 | procinfo *pi; | |
962 | { | |
963 | if (!pi->status_valid) | |
964 | if (!proc_get_status (pi)) | |
965 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 966 | |
c3f6f71d JM |
967 | #ifdef NEW_PROC_API |
968 | return pi->prstatus.pr_lwp.pr_what; | |
969 | #else | |
970 | return pi->prstatus.pr_what; | |
c906108c | 971 | #endif |
c3f6f71d | 972 | } |
c906108c | 973 | |
c3f6f71d JM |
974 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
975 | /* | |
976 | * Function: proc_nsysarg | |
977 | * | |
978 | * returns the pr_nsysarg field (number of args to the current syscall). | |
979 | */ | |
980 | ||
981 | int | |
982 | proc_nsysarg (pi) | |
983 | procinfo *pi; | |
984 | { | |
985 | if (!pi->status_valid) | |
986 | if (!proc_get_status (pi)) | |
987 | return 0; | |
988 | ||
989 | #ifdef NEW_PROC_API | |
990 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
991 | #else | |
992 | return pi->prstatus.pr_nsysarg; | |
c906108c | 993 | #endif |
c3f6f71d | 994 | } |
c906108c | 995 | |
c3f6f71d JM |
996 | /* |
997 | * Function: proc_sysargs | |
998 | * | |
999 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1000 | */ | |
c906108c | 1001 | |
c3f6f71d JM |
1002 | long * |
1003 | proc_sysargs (pi) | |
1004 | procinfo *pi; | |
1005 | { | |
1006 | if (!pi->status_valid) | |
1007 | if (!proc_get_status (pi)) | |
1008 | return NULL; | |
1009 | ||
1010 | #ifdef NEW_PROC_API | |
1011 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1012 | #else | |
1013 | return (long *) &pi->prstatus.pr_sysarg; | |
1014 | #endif | |
1015 | } | |
c906108c | 1016 | |
c3f6f71d JM |
1017 | /* |
1018 | * Function: proc_syscall | |
1019 | * | |
1020 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1021 | */ | |
c906108c | 1022 | |
c3f6f71d JM |
1023 | int |
1024 | proc_syscall (pi) | |
1025 | procinfo *pi; | |
1026 | { | |
1027 | if (!pi->status_valid) | |
1028 | if (!proc_get_status (pi)) | |
1029 | return 0; | |
1030 | ||
1031 | #ifdef NEW_PROC_API | |
1032 | return pi->prstatus.pr_lwp.pr_syscall; | |
1033 | #else | |
1034 | return pi->prstatus.pr_syscall; | |
1035 | #endif | |
1036 | } | |
1037 | #endif /* PIOCSSPCACT */ | |
c906108c | 1038 | |
c3f6f71d JM |
1039 | /* |
1040 | * Function: proc_cursig: | |
1041 | * | |
1042 | * returns the pr_cursig field (current signal). | |
1043 | */ | |
c906108c | 1044 | |
c3f6f71d JM |
1045 | long |
1046 | proc_cursig (struct procinfo *pi) | |
1047 | { | |
1048 | if (!pi->status_valid) | |
1049 | if (!proc_get_status (pi)) | |
1050 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1051 | |
c3f6f71d JM |
1052 | #ifdef NEW_PROC_API |
1053 | return pi->prstatus.pr_lwp.pr_cursig; | |
1054 | #else | |
1055 | return pi->prstatus.pr_cursig; | |
1056 | #endif | |
1057 | } | |
c906108c | 1058 | |
c3f6f71d | 1059 | /* |
0d06e24b | 1060 | * Function: proc_modify_flag |
c3f6f71d JM |
1061 | * |
1062 | * === I appologize for the messiness of this function. | |
1063 | * === This is an area where the different versions of | |
1064 | * === /proc are more inconsistent than usual. MVS | |
1065 | * | |
1066 | * Set or reset any of the following process flags: | |
1067 | * PR_FORK -- forked child will inherit trace flags | |
1068 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1069 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1070 | * PR_ASYNC -- LWP's get to run/stop independently. |
1071 | * | |
1072 | * There are three methods for doing this function: | |
1073 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1074 | * [Sol6, Sol7, UW] | |
1075 | * 2) Middle: PIOCSET/PIOCRESET | |
1076 | * [Irix, Sol5] | |
1077 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1078 | * [OSF, Sol5] | |
1079 | * | |
1080 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1081 | * Note: OSF does not define PR_KLC. |
1082 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1083 | * |
1084 | * Arguments: | |
1085 | * pi -- the procinfo | |
1086 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1087 | * mode -- 1 for set, 0 for reset. | |
1088 | * | |
1089 | * Returns non-zero for success, zero for failure. | |
1090 | */ | |
c906108c | 1091 | |
c3f6f71d | 1092 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1093 | |
c3f6f71d JM |
1094 | static int |
1095 | proc_modify_flag (pi, flag, mode) | |
1096 | procinfo *pi; | |
1097 | long flag; | |
1098 | long mode; | |
1099 | { | |
1100 | long win = 0; /* default to fail */ | |
1101 | ||
1102 | /* | |
1103 | * These operations affect the process as a whole, and applying | |
1104 | * them to an individual LWP has the same meaning as applying them | |
1105 | * to the main process. Therefore, if we're ever called with a | |
1106 | * pointer to an LWP's procinfo, let's substitute the process's | |
1107 | * procinfo and avoid opening the LWP's file descriptor | |
1108 | * unnecessarily. | |
1109 | */ | |
1110 | ||
1111 | if (pi->pid != 0) | |
1112 | pi = find_procinfo_or_die (pi->pid, 0); | |
1113 | ||
1114 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1115 | /* First normalize the PCUNSET/PCRESET command opcode | |
1116 | (which for no obvious reason has a different definition | |
1117 | from one operating system to the next...) */ | |
1118 | #ifdef PCUNSET | |
1119 | #define GDBRESET PCUNSET | |
1120 | #endif | |
1121 | #ifdef PCRESET | |
1122 | #define GDBRESET PCRESET | |
c906108c | 1123 | #endif |
c3f6f71d JM |
1124 | { |
1125 | long arg[2]; | |
c906108c | 1126 | |
c3f6f71d JM |
1127 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1128 | arg[0] = PCSET; | |
1129 | else /* Reset the flag */ | |
1130 | arg[0] = GDBRESET; | |
c5aa993b | 1131 | |
c3f6f71d JM |
1132 | arg[1] = flag; |
1133 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1134 | } | |
1135 | #else | |
1136 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1137 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1138 | { | |
1139 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1140 | } | |
1141 | else /* Reset the flag */ | |
1142 | { | |
1143 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1144 | } | |
c906108c | 1145 | |
c3f6f71d JM |
1146 | #else |
1147 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1148 | switch (flag) { | |
1149 | case PR_RLC: | |
1150 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1151 | { | |
1152 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1153 | } | |
1154 | else /* Clear run-on-last-close */ | |
1155 | { | |
1156 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1157 | } | |
1158 | break; | |
1159 | case PR_FORK: | |
1160 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1161 | { | |
1162 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1163 | } | |
1164 | else /* Clear inherit-on-fork */ | |
1165 | { | |
1166 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1167 | } | |
1168 | break; | |
1169 | default: | |
1170 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1171 | break; | |
1172 | } | |
1173 | #endif | |
1174 | #endif | |
1175 | #endif | |
1176 | #undef GDBRESET | |
1177 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1178 | pi->status_valid = 0; | |
c906108c | 1179 | |
c3f6f71d JM |
1180 | if (!win) |
1181 | warning ("procfs: modify_flag failed to turn %s %s", | |
1182 | flag == PR_FORK ? "PR_FORK" : | |
1183 | flag == PR_RLC ? "PR_RLC" : | |
1184 | #ifdef PR_ASYNC | |
1185 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1186 | #endif |
1187 | #ifdef PR_KLC | |
1188 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1189 | #endif |
1190 | "<unknown flag>", | |
1191 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1192 | |
c3f6f71d JM |
1193 | return win; |
1194 | } | |
c906108c | 1195 | |
c3f6f71d JM |
1196 | /* |
1197 | * Function: proc_set_run_on_last_close | |
1198 | * | |
1199 | * Set the run_on_last_close flag. | |
1200 | * Process with all threads will become runnable | |
1201 | * when debugger closes all /proc fds. | |
1202 | * | |
1203 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1204 | */ |
1205 | ||
c3f6f71d JM |
1206 | int |
1207 | proc_set_run_on_last_close (pi) | |
1208 | procinfo *pi; | |
c906108c | 1209 | { |
c3f6f71d JM |
1210 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1211 | } | |
c906108c | 1212 | |
c3f6f71d JM |
1213 | /* |
1214 | * Function: proc_unset_run_on_last_close | |
1215 | * | |
1216 | * Reset the run_on_last_close flag. | |
1217 | * Process will NOT become runnable | |
1218 | * when debugger closes its file handles. | |
1219 | * | |
1220 | * Returns non-zero for success, zero for failure. | |
1221 | */ | |
c906108c | 1222 | |
c3f6f71d JM |
1223 | int |
1224 | proc_unset_run_on_last_close (pi) | |
1225 | procinfo *pi; | |
1226 | { | |
1227 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1228 | } |
1229 | ||
0d06e24b JM |
1230 | #ifdef PR_KLC |
1231 | /* | |
1232 | * Function: proc_set_kill_on_last_close | |
1233 | * | |
1234 | * Set the kill_on_last_close flag. | |
1235 | * Process with all threads will be killed when debugger | |
1236 | * closes all /proc fds (or debugger exits or dies). | |
1237 | * | |
1238 | * Returns non-zero for success, zero for failure. | |
1239 | */ | |
1240 | ||
1241 | int | |
1242 | proc_set_kill_on_last_close (pi) | |
1243 | procinfo *pi; | |
1244 | { | |
1245 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Function: proc_unset_kill_on_last_close | |
1250 | * | |
1251 | * Reset the kill_on_last_close flag. | |
1252 | * Process will NOT be killed when debugger | |
1253 | * closes its file handles (or exits or dies). | |
1254 | * | |
1255 | * Returns non-zero for success, zero for failure. | |
1256 | */ | |
1257 | ||
1258 | int | |
1259 | proc_unset_kill_on_last_close (pi) | |
1260 | procinfo *pi; | |
1261 | { | |
1262 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1263 | } | |
1264 | #endif /* PR_KLC */ | |
1265 | ||
c906108c | 1266 | /* |
c3f6f71d JM |
1267 | * Function: proc_set_inherit_on_fork |
1268 | * | |
1269 | * Set inherit_on_fork flag. | |
1270 | * If the process forks a child while we are registered for events | |
1271 | * in the parent, then we will also recieve events from the child. | |
1272 | * | |
1273 | * Returns non-zero for success, zero for failure. | |
1274 | */ | |
c906108c | 1275 | |
c3f6f71d JM |
1276 | int |
1277 | proc_set_inherit_on_fork (pi) | |
1278 | procinfo *pi; | |
1279 | { | |
1280 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1281 | } | |
c5aa993b | 1282 | |
c3f6f71d JM |
1283 | /* |
1284 | * Function: proc_unset_inherit_on_fork | |
1285 | * | |
1286 | * Reset inherit_on_fork flag. | |
1287 | * If the process forks a child while we are registered for events | |
1288 | * in the parent, then we will NOT recieve events from the child. | |
1289 | * | |
1290 | * Returns non-zero for success, zero for failure. | |
1291 | */ | |
c906108c | 1292 | |
c3f6f71d JM |
1293 | int |
1294 | proc_unset_inherit_on_fork (pi) | |
1295 | procinfo *pi; | |
1296 | { | |
1297 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1298 | } | |
c906108c | 1299 | |
c3f6f71d JM |
1300 | #ifdef PR_ASYNC |
1301 | /* | |
1302 | * Function: proc_set_async | |
1303 | * | |
1304 | * Set PR_ASYNC flag. | |
1305 | * If one LWP stops because of a debug event (signal etc.), | |
1306 | * the remaining LWPs will continue to run. | |
1307 | * | |
1308 | * Returns non-zero for success, zero for failure. | |
1309 | */ | |
c906108c | 1310 | |
c3f6f71d JM |
1311 | int |
1312 | proc_set_async (pi) | |
1313 | procinfo *pi; | |
1314 | { | |
1315 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1316 | } | |
c906108c | 1317 | |
c3f6f71d JM |
1318 | /* |
1319 | * Function: proc_unset_async | |
1320 | * | |
1321 | * Reset PR_ASYNC flag. | |
1322 | * If one LWP stops because of a debug event (signal etc.), | |
1323 | * then all other LWPs will stop as well. | |
1324 | * | |
1325 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1326 | */ |
1327 | ||
c3f6f71d JM |
1328 | int |
1329 | proc_unset_async (pi) | |
1330 | procinfo *pi; | |
1331 | { | |
1332 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1333 | } | |
1334 | #endif /* PR_ASYNC */ | |
c906108c SS |
1335 | |
1336 | /* | |
c3f6f71d JM |
1337 | * Function: proc_stop_process |
1338 | * | |
1339 | * Request the process/LWP to stop. Does not wait. | |
1340 | * Returns non-zero for success, zero for failure. | |
1341 | */ | |
c906108c | 1342 | |
c3f6f71d JM |
1343 | int |
1344 | proc_stop_process (pi) | |
1345 | procinfo *pi; | |
1346 | { | |
1347 | int win; | |
c906108c | 1348 | |
c3f6f71d JM |
1349 | /* |
1350 | * We might conceivably apply this operation to an LWP, and | |
1351 | * the LWP's ctl file descriptor might not be open. | |
1352 | */ | |
c906108c | 1353 | |
c3f6f71d JM |
1354 | if (pi->ctl_fd == 0 && |
1355 | open_procinfo_files (pi, FD_CTL) == 0) | |
1356 | return 0; | |
1357 | else | |
1358 | { | |
1359 | #ifdef NEW_PROC_API | |
6c1a54b2 | 1360 | long cmd = PCSTOP; |
c3f6f71d JM |
1361 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1362 | #else /* ioctl method */ | |
1363 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1364 | /* Note: the call also reads the prstatus. */ | |
1365 | if (win) | |
1366 | { | |
1367 | pi->status_valid = 1; | |
1368 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1369 | proc_why (pi), | |
1370 | proc_what (pi), | |
1371 | proc_get_current_thread (pi)); | |
1372 | } | |
1373 | #endif | |
1374 | } | |
c906108c | 1375 | |
c3f6f71d JM |
1376 | return win; |
1377 | } | |
c5aa993b | 1378 | |
c3f6f71d JM |
1379 | /* |
1380 | * Function: proc_wait_for_stop | |
1381 | * | |
1382 | * Wait for the process or LWP to stop (block until it does). | |
1383 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1384 | */ |
1385 | ||
c3f6f71d JM |
1386 | int |
1387 | proc_wait_for_stop (pi) | |
1388 | procinfo *pi; | |
c906108c | 1389 | { |
c3f6f71d JM |
1390 | int win; |
1391 | ||
1392 | /* | |
1393 | * We should never have to apply this operation to any procinfo | |
1394 | * except the one for the main process. If that ever changes | |
1395 | * for any reason, then take out the following clause and | |
1396 | * replace it with one that makes sure the ctl_fd is open. | |
1397 | */ | |
1398 | ||
1399 | if (pi->tid != 0) | |
1400 | pi = find_procinfo_or_die (pi->pid, 0); | |
1401 | ||
1402 | #ifdef NEW_PROC_API | |
1403 | { | |
6c1a54b2 | 1404 | long cmd = PCWSTOP; |
c3f6f71d JM |
1405 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1406 | /* We been runnin' and we stopped -- need to update status. */ | |
1407 | pi->status_valid = 0; | |
1408 | } | |
1409 | #else /* ioctl method */ | |
1410 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1411 | /* Above call also refreshes the prstatus. */ | |
1412 | if (win) | |
1413 | { | |
1414 | pi->status_valid = 1; | |
1415 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1416 | proc_why (pi), | |
1417 | proc_what (pi), | |
1418 | proc_get_current_thread (pi)); | |
1419 | } | |
c906108c SS |
1420 | #endif |
1421 | ||
c3f6f71d | 1422 | return win; |
c906108c SS |
1423 | } |
1424 | ||
1425 | /* | |
c3f6f71d JM |
1426 | * Function: proc_run_process |
1427 | * | |
1428 | * Make the process or LWP runnable. | |
1429 | * Options (not all are implemented): | |
1430 | * - single-step | |
1431 | * - clear current fault | |
1432 | * - clear current signal | |
1433 | * - abort the current system call | |
1434 | * - stop as soon as finished with system call | |
1435 | * - (ioctl): set traced signal set | |
1436 | * - (ioctl): set held signal set | |
1437 | * - (ioctl): set traced fault set | |
1438 | * - (ioctl): set start pc (vaddr) | |
1439 | * Always clear the current fault. | |
1440 | * Clear the current signal if 'signo' is zero. | |
1441 | * | |
1442 | * Arguments: | |
1443 | * pi the process or LWP to operate on. | |
1444 | * step if true, set the process or LWP to trap after one instr. | |
1445 | * signo if zero, clear the current signal if any. | |
1446 | * if non-zero, set the current signal to this one. | |
1447 | * | |
1448 | * Returns non-zero for success, zero for failure. | |
1449 | */ | |
1450 | ||
1451 | int | |
1452 | proc_run_process (pi, step, signo) | |
1453 | procinfo *pi; | |
1454 | int step; | |
1455 | int signo; | |
1456 | { | |
1457 | int win; | |
1458 | int runflags; | |
1459 | ||
1460 | /* | |
1461 | * We will probably have to apply this operation to individual threads, | |
1462 | * so make sure the control file descriptor is open. | |
1463 | */ | |
1464 | ||
1465 | if (pi->ctl_fd == 0 && | |
1466 | open_procinfo_files (pi, FD_CTL) == 0) | |
1467 | { | |
1468 | return 0; | |
1469 | } | |
c906108c | 1470 | |
c3f6f71d JM |
1471 | runflags = PRCFAULT; /* always clear current fault */ |
1472 | if (step) | |
1473 | runflags |= PRSTEP; | |
1474 | if (signo == 0) | |
1475 | runflags |= PRCSIG; | |
1476 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1477 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1478 | |
c3f6f71d JM |
1479 | #ifdef NEW_PROC_API |
1480 | { | |
6c1a54b2 | 1481 | long cmd[2]; |
c906108c | 1482 | |
c3f6f71d JM |
1483 | cmd[0] = PCRUN; |
1484 | cmd[1] = runflags; | |
1485 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1486 | } | |
1487 | #else /* ioctl method */ | |
1488 | { | |
1489 | prrun_t prrun; | |
c906108c | 1490 | |
c3f6f71d JM |
1491 | memset (&prrun, 0, sizeof (prrun)); |
1492 | prrun.pr_flags = runflags; | |
1493 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1494 | } | |
1495 | #endif | |
c906108c | 1496 | |
c3f6f71d JM |
1497 | return win; |
1498 | } | |
c906108c | 1499 | |
c3f6f71d JM |
1500 | /* |
1501 | * Function: proc_set_traced_signals | |
1502 | * | |
1503 | * Register to trace signals in the process or LWP. | |
1504 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1505 | */ |
1506 | ||
c3f6f71d JM |
1507 | int |
1508 | proc_set_traced_signals (pi, sigset) | |
1509 | procinfo *pi; | |
1510 | sigset_t *sigset; | |
c906108c | 1511 | { |
c3f6f71d JM |
1512 | int win; |
1513 | ||
1514 | /* | |
1515 | * We should never have to apply this operation to any procinfo | |
1516 | * except the one for the main process. If that ever changes | |
1517 | * for any reason, then take out the following clause and | |
1518 | * replace it with one that makes sure the ctl_fd is open. | |
1519 | */ | |
1520 | ||
1521 | if (pi->tid != 0) | |
1522 | pi = find_procinfo_or_die (pi->pid, 0); | |
1523 | ||
1524 | #ifdef NEW_PROC_API | |
1525 | { | |
1526 | struct { | |
6c1a54b2 | 1527 | long cmd; |
c3f6f71d JM |
1528 | /* Use char array to avoid alignment issues. */ |
1529 | char sigset[sizeof (sigset_t)]; | |
1530 | } arg; | |
c906108c | 1531 | |
c3f6f71d JM |
1532 | arg.cmd = PCSTRACE; |
1533 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
c906108c | 1534 | |
c3f6f71d JM |
1535 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1536 | } | |
1537 | #else /* ioctl method */ | |
1538 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1539 | #endif | |
1540 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1541 | pi->status_valid = 0; | |
c906108c | 1542 | |
c3f6f71d JM |
1543 | if (!win) |
1544 | warning ("procfs: set_traced_signals failed"); | |
1545 | return win; | |
c906108c SS |
1546 | } |
1547 | ||
1548 | /* | |
c3f6f71d JM |
1549 | * Function: proc_set_traced_faults |
1550 | * | |
1551 | * Register to trace hardware faults in the process or LWP. | |
1552 | * Returns non-zero for success, zero for failure. | |
1553 | */ | |
c906108c | 1554 | |
c3f6f71d JM |
1555 | int |
1556 | proc_set_traced_faults (pi, fltset) | |
1557 | procinfo *pi; | |
1558 | fltset_t *fltset; | |
1559 | { | |
1560 | int win; | |
1561 | ||
1562 | /* | |
1563 | * We should never have to apply this operation to any procinfo | |
1564 | * except the one for the main process. If that ever changes | |
1565 | * for any reason, then take out the following clause and | |
1566 | * replace it with one that makes sure the ctl_fd is open. | |
1567 | */ | |
1568 | ||
1569 | if (pi->tid != 0) | |
1570 | pi = find_procinfo_or_die (pi->pid, 0); | |
1571 | ||
1572 | #ifdef NEW_PROC_API | |
1573 | { | |
1574 | struct { | |
6c1a54b2 | 1575 | long cmd; |
c3f6f71d JM |
1576 | /* Use char array to avoid alignment issues. */ |
1577 | char fltset[sizeof (fltset_t)]; | |
1578 | } arg; | |
c906108c | 1579 | |
c3f6f71d JM |
1580 | arg.cmd = PCSFAULT; |
1581 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1582 | |
c3f6f71d JM |
1583 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1584 | } | |
1585 | #else /* ioctl method */ | |
1586 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1587 | #endif | |
1588 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1589 | pi->status_valid = 0; | |
c906108c | 1590 | |
c3f6f71d JM |
1591 | return win; |
1592 | } | |
c5aa993b | 1593 | |
c3f6f71d JM |
1594 | /* |
1595 | * Function: proc_set_traced_sysentry | |
1596 | * | |
1597 | * Register to trace entry to system calls in the process or LWP. | |
1598 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1599 | */ |
1600 | ||
c3f6f71d JM |
1601 | int |
1602 | proc_set_traced_sysentry (pi, sysset) | |
1603 | procinfo *pi; | |
1604 | sysset_t *sysset; | |
c906108c | 1605 | { |
c3f6f71d JM |
1606 | int win; |
1607 | ||
1608 | /* | |
1609 | * We should never have to apply this operation to any procinfo | |
1610 | * except the one for the main process. If that ever changes | |
1611 | * for any reason, then take out the following clause and | |
1612 | * replace it with one that makes sure the ctl_fd is open. | |
1613 | */ | |
1614 | ||
1615 | if (pi->tid != 0) | |
1616 | pi = find_procinfo_or_die (pi->pid, 0); | |
1617 | ||
1618 | #ifdef NEW_PROC_API | |
1619 | { | |
1620 | struct { | |
6c1a54b2 | 1621 | long cmd; |
c3f6f71d JM |
1622 | /* Use char array to avoid alignment issues. */ |
1623 | char sysset[sizeof (sysset_t)]; | |
1624 | } arg; | |
1625 | ||
1626 | arg.cmd = PCSENTRY; | |
1627 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
1628 | ||
1629 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
1630 | } | |
1631 | #else /* ioctl method */ | |
1632 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1633 | #endif | |
1634 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1635 | pi->status_valid = 0; | |
1636 | ||
1637 | return win; | |
c906108c SS |
1638 | } |
1639 | ||
1640 | /* | |
c3f6f71d JM |
1641 | * Function: proc_set_traced_sysexit |
1642 | * | |
1643 | * Register to trace exit from system calls in the process or LWP. | |
1644 | * Returns non-zero for success, zero for failure. | |
1645 | */ | |
c906108c | 1646 | |
c3f6f71d JM |
1647 | int |
1648 | proc_set_traced_sysexit (pi, sysset) | |
1649 | procinfo *pi; | |
1650 | sysset_t *sysset; | |
1651 | { | |
1652 | int win; | |
1653 | ||
1654 | /* | |
1655 | * We should never have to apply this operation to any procinfo | |
1656 | * except the one for the main process. If that ever changes | |
1657 | * for any reason, then take out the following clause and | |
1658 | * replace it with one that makes sure the ctl_fd is open. | |
1659 | */ | |
1660 | ||
1661 | if (pi->tid != 0) | |
1662 | pi = find_procinfo_or_die (pi->pid, 0); | |
1663 | ||
1664 | #ifdef NEW_PROC_API | |
1665 | { | |
1666 | struct { | |
6c1a54b2 | 1667 | long cmd; |
c3f6f71d JM |
1668 | /* Use char array to avoid alignment issues. */ |
1669 | char sysset[sizeof (sysset_t)]; | |
1670 | } arg; | |
c906108c | 1671 | |
c3f6f71d JM |
1672 | arg.cmd = PCSEXIT; |
1673 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1674 | |
c3f6f71d JM |
1675 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1676 | } | |
1677 | #else /* ioctl method */ | |
1678 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1679 | #endif | |
1680 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1681 | pi->status_valid = 0; | |
c906108c | 1682 | |
c3f6f71d JM |
1683 | return win; |
1684 | } | |
c906108c | 1685 | |
c3f6f71d JM |
1686 | /* |
1687 | * Function: proc_set_held_signals | |
1688 | * | |
1689 | * Specify the set of blocked / held signals in the process or LWP. | |
1690 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1691 | */ |
1692 | ||
c3f6f71d JM |
1693 | int |
1694 | proc_set_held_signals (pi, sighold) | |
1695 | procinfo *pi; | |
1696 | sigset_t *sighold; | |
c906108c | 1697 | { |
c3f6f71d JM |
1698 | int win; |
1699 | ||
1700 | /* | |
1701 | * We should never have to apply this operation to any procinfo | |
1702 | * except the one for the main process. If that ever changes | |
1703 | * for any reason, then take out the following clause and | |
1704 | * replace it with one that makes sure the ctl_fd is open. | |
1705 | */ | |
1706 | ||
1707 | if (pi->tid != 0) | |
1708 | pi = find_procinfo_or_die (pi->pid, 0); | |
1709 | ||
1710 | #ifdef NEW_PROC_API | |
1711 | { | |
1712 | struct { | |
6c1a54b2 | 1713 | long cmd; |
c3f6f71d JM |
1714 | /* Use char array to avoid alignment issues. */ |
1715 | char hold[sizeof (sigset_t)]; | |
1716 | } arg; | |
1717 | ||
1718 | arg.cmd = PCSHOLD; | |
1719 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1720 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1721 | } | |
c906108c | 1722 | #else |
c3f6f71d | 1723 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1724 | #endif |
c3f6f71d JM |
1725 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1726 | pi->status_valid = 0; | |
1727 | ||
1728 | return win; | |
c906108c SS |
1729 | } |
1730 | ||
1731 | /* | |
c3f6f71d JM |
1732 | * Function: proc_get_pending_signals |
1733 | * | |
1734 | * returns the set of signals that are pending in the process or LWP. | |
1735 | * Will also copy the sigset if 'save' is non-zero. | |
1736 | */ | |
c906108c | 1737 | |
c3f6f71d JM |
1738 | sigset_t * |
1739 | proc_get_pending_signals (pi, save) | |
1740 | procinfo *pi; | |
1741 | sigset_t *save; | |
1742 | { | |
1743 | sigset_t *ret = NULL; | |
1744 | ||
1745 | /* | |
1746 | * We should never have to apply this operation to any procinfo | |
1747 | * except the one for the main process. If that ever changes | |
1748 | * for any reason, then take out the following clause and | |
1749 | * replace it with one that makes sure the ctl_fd is open. | |
1750 | */ | |
1751 | ||
1752 | if (pi->tid != 0) | |
1753 | pi = find_procinfo_or_die (pi->pid, 0); | |
1754 | ||
1755 | if (!pi->status_valid) | |
1756 | if (!proc_get_status (pi)) | |
1757 | return NULL; | |
1758 | ||
1759 | #ifdef NEW_PROC_API | |
1760 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1761 | #else | |
1762 | ret = &pi->prstatus.pr_sigpend; | |
1763 | #endif | |
1764 | if (save && ret) | |
1765 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1766 | |
c3f6f71d JM |
1767 | return ret; |
1768 | } | |
c906108c | 1769 | |
c3f6f71d JM |
1770 | /* |
1771 | * Function: proc_get_signal_actions | |
1772 | * | |
1773 | * returns the set of signal actions. | |
1774 | * Will also copy the sigactionset if 'save' is non-zero. | |
1775 | */ | |
c906108c | 1776 | |
c3f6f71d JM |
1777 | struct sigaction * |
1778 | proc_get_signal_actions (pi, save) | |
1779 | procinfo *pi; | |
1780 | struct sigaction *save; | |
1781 | { | |
1782 | struct sigaction *ret = NULL; | |
1783 | ||
1784 | /* | |
1785 | * We should never have to apply this operation to any procinfo | |
1786 | * except the one for the main process. If that ever changes | |
1787 | * for any reason, then take out the following clause and | |
1788 | * replace it with one that makes sure the ctl_fd is open. | |
1789 | */ | |
1790 | ||
1791 | if (pi->tid != 0) | |
1792 | pi = find_procinfo_or_die (pi->pid, 0); | |
1793 | ||
1794 | if (!pi->status_valid) | |
1795 | if (!proc_get_status (pi)) | |
1796 | return NULL; | |
1797 | ||
1798 | #ifdef NEW_PROC_API | |
1799 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1800 | #else | |
1801 | ret = &pi->prstatus.pr_action; | |
1802 | #endif | |
1803 | if (save && ret) | |
1804 | memcpy (save, ret, sizeof (struct sigaction)); | |
c906108c | 1805 | |
c3f6f71d JM |
1806 | return ret; |
1807 | } | |
c5aa993b | 1808 | |
c3f6f71d JM |
1809 | /* |
1810 | * Function: proc_get_held_signals | |
1811 | * | |
1812 | * returns the set of signals that are held / blocked. | |
1813 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
1814 | */ |
1815 | ||
c3f6f71d JM |
1816 | sigset_t * |
1817 | proc_get_held_signals (pi, save) | |
1818 | procinfo *pi; | |
1819 | sigset_t *save; | |
c906108c | 1820 | { |
c3f6f71d JM |
1821 | sigset_t *ret = NULL; |
1822 | ||
1823 | /* | |
1824 | * We should never have to apply this operation to any procinfo | |
1825 | * except the one for the main process. If that ever changes | |
1826 | * for any reason, then take out the following clause and | |
1827 | * replace it with one that makes sure the ctl_fd is open. | |
1828 | */ | |
1829 | ||
1830 | if (pi->tid != 0) | |
1831 | pi = find_procinfo_or_die (pi->pid, 0); | |
1832 | ||
1833 | #ifdef NEW_PROC_API | |
1834 | if (!pi->status_valid) | |
1835 | if (!proc_get_status (pi)) | |
1836 | return NULL; | |
1837 | ||
1838 | #ifdef UNIXWARE | |
1839 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1840 | #else |
c3f6f71d JM |
1841 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1842 | #endif /* UNIXWARE */ | |
1843 | #else /* not NEW_PROC_API */ | |
1844 | { | |
1845 | static sigset_t sigheld; | |
1846 | ||
1847 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1848 | ret = &sigheld; | |
1849 | } | |
1850 | #endif /* NEW_PROC_API */ | |
1851 | if (save && ret) | |
1852 | memcpy (save, ret, sizeof (sigset_t)); | |
1853 | ||
1854 | return ret; | |
c906108c SS |
1855 | } |
1856 | ||
c3f6f71d JM |
1857 | /* |
1858 | * Function: proc_get_traced_signals | |
1859 | * | |
1860 | * returns the set of signals that are traced / debugged. | |
1861 | * Will also copy the sigset if 'save' is non-zero. | |
1862 | */ | |
1863 | ||
1864 | sigset_t * | |
1865 | proc_get_traced_signals (pi, save) | |
1866 | procinfo *pi; | |
1867 | sigset_t *save; | |
c906108c | 1868 | { |
c3f6f71d JM |
1869 | sigset_t *ret = NULL; |
1870 | ||
1871 | /* | |
1872 | * We should never have to apply this operation to any procinfo | |
1873 | * except the one for the main process. If that ever changes | |
1874 | * for any reason, then take out the following clause and | |
1875 | * replace it with one that makes sure the ctl_fd is open. | |
1876 | */ | |
1877 | ||
1878 | if (pi->tid != 0) | |
1879 | pi = find_procinfo_or_die (pi->pid, 0); | |
1880 | ||
1881 | #ifdef NEW_PROC_API | |
1882 | if (!pi->status_valid) | |
1883 | if (!proc_get_status (pi)) | |
1884 | return NULL; | |
1885 | ||
1886 | ret = &pi->prstatus.pr_sigtrace; | |
1887 | #else | |
1888 | { | |
1889 | static sigset_t sigtrace; | |
1890 | ||
1891 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1892 | ret = &sigtrace; | |
1893 | } | |
c906108c | 1894 | #endif |
c3f6f71d JM |
1895 | if (save && ret) |
1896 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1897 | |
c3f6f71d JM |
1898 | return ret; |
1899 | } | |
c906108c | 1900 | |
c3f6f71d JM |
1901 | /* |
1902 | * Function: proc_trace_signal | |
1903 | * | |
1904 | * Add 'signo' to the set of signals that are traced. | |
1905 | * Returns non-zero for success, zero for failure. | |
1906 | */ | |
c906108c | 1907 | |
c3f6f71d JM |
1908 | int |
1909 | proc_trace_signal (pi, signo) | |
1910 | procinfo *pi; | |
1911 | int signo; | |
1912 | { | |
1913 | sigset_t temp; | |
1914 | ||
1915 | /* | |
1916 | * We should never have to apply this operation to any procinfo | |
1917 | * except the one for the main process. If that ever changes | |
1918 | * for any reason, then take out the following clause and | |
1919 | * replace it with one that makes sure the ctl_fd is open. | |
1920 | */ | |
1921 | ||
1922 | if (pi->tid != 0) | |
1923 | pi = find_procinfo_or_die (pi->pid, 0); | |
1924 | ||
1925 | if (pi) | |
c906108c | 1926 | { |
c3f6f71d | 1927 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1928 | { |
c3f6f71d JM |
1929 | praddset (&temp, signo); |
1930 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
1931 | } |
1932 | } | |
c5aa993b | 1933 | |
c3f6f71d JM |
1934 | return 0; /* failure */ |
1935 | } | |
c906108c | 1936 | |
c3f6f71d JM |
1937 | /* |
1938 | * Function: proc_ignore_signal | |
1939 | * | |
1940 | * Remove 'signo' from the set of signals that are traced. | |
1941 | * Returns non-zero for success, zero for failure. | |
1942 | */ | |
c906108c | 1943 | |
c3f6f71d JM |
1944 | int |
1945 | proc_ignore_signal (pi, signo) | |
1946 | procinfo *pi; | |
1947 | int signo; | |
1948 | { | |
1949 | sigset_t temp; | |
1950 | ||
1951 | /* | |
1952 | * We should never have to apply this operation to any procinfo | |
1953 | * except the one for the main process. If that ever changes | |
1954 | * for any reason, then take out the following clause and | |
1955 | * replace it with one that makes sure the ctl_fd is open. | |
1956 | */ | |
1957 | ||
1958 | if (pi->tid != 0) | |
1959 | pi = find_procinfo_or_die (pi->pid, 0); | |
1960 | ||
1961 | if (pi) | |
c906108c | 1962 | { |
c3f6f71d | 1963 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1964 | { |
c3f6f71d JM |
1965 | prdelset (&temp, signo); |
1966 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 1967 | } |
c906108c | 1968 | } |
c906108c | 1969 | |
c3f6f71d | 1970 | return 0; /* failure */ |
c906108c SS |
1971 | } |
1972 | ||
1973 | /* | |
c3f6f71d JM |
1974 | * Function: proc_get_traced_faults |
1975 | * | |
1976 | * returns the set of hardware faults that are traced /debugged. | |
1977 | * Will also copy the faultset if 'save' is non-zero. | |
1978 | */ | |
1979 | ||
1980 | fltset_t * | |
1981 | proc_get_traced_faults (pi, save) | |
1982 | procinfo *pi; | |
1983 | fltset_t *save; | |
1984 | { | |
1985 | fltset_t *ret = NULL; | |
1986 | ||
1987 | /* | |
1988 | * We should never have to apply this operation to any procinfo | |
1989 | * except the one for the main process. If that ever changes | |
1990 | * for any reason, then take out the following clause and | |
1991 | * replace it with one that makes sure the ctl_fd is open. | |
1992 | */ | |
1993 | ||
1994 | if (pi->tid != 0) | |
1995 | pi = find_procinfo_or_die (pi->pid, 0); | |
1996 | ||
1997 | #ifdef NEW_PROC_API | |
1998 | if (!pi->status_valid) | |
1999 | if (!proc_get_status (pi)) | |
2000 | return NULL; | |
2001 | ||
2002 | ret = &pi->prstatus.pr_flttrace; | |
2003 | #else | |
2004 | { | |
2005 | static fltset_t flttrace; | |
2006 | ||
2007 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2008 | ret = &flttrace; | |
2009 | } | |
2010 | #endif | |
2011 | if (save && ret) | |
2012 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2013 | |
c3f6f71d JM |
2014 | return ret; |
2015 | } | |
c906108c | 2016 | |
c3f6f71d JM |
2017 | /* |
2018 | * Function: proc_get_traced_sysentry | |
2019 | * | |
2020 | * returns the set of syscalls that are traced /debugged on entry. | |
2021 | * Will also copy the syscall set if 'save' is non-zero. | |
2022 | */ | |
c906108c | 2023 | |
c3f6f71d JM |
2024 | sysset_t * |
2025 | proc_get_traced_sysentry (pi, save) | |
2026 | procinfo *pi; | |
2027 | sysset_t *save; | |
2028 | { | |
2029 | sysset_t *ret = NULL; | |
2030 | ||
2031 | /* | |
2032 | * We should never have to apply this operation to any procinfo | |
2033 | * except the one for the main process. If that ever changes | |
2034 | * for any reason, then take out the following clause and | |
2035 | * replace it with one that makes sure the ctl_fd is open. | |
2036 | */ | |
2037 | ||
2038 | if (pi->tid != 0) | |
2039 | pi = find_procinfo_or_die (pi->pid, 0); | |
2040 | ||
2041 | #ifdef NEW_PROC_API | |
2042 | if (!pi->status_valid) | |
2043 | if (!proc_get_status (pi)) | |
2044 | return NULL; | |
2045 | ||
2046 | ret = &pi->prstatus.pr_sysentry; | |
2047 | #else | |
2048 | { | |
2049 | static sysset_t sysentry; | |
c906108c | 2050 | |
c3f6f71d JM |
2051 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2052 | ret = &sysentry; | |
2053 | } | |
2054 | #endif | |
2055 | if (save && ret) | |
2056 | memcpy (save, ret, sizeof (sysset_t)); | |
c906108c | 2057 | |
c3f6f71d JM |
2058 | return ret; |
2059 | } | |
c5aa993b | 2060 | |
c3f6f71d JM |
2061 | /* |
2062 | * Function: proc_get_traced_sysexit | |
2063 | * | |
2064 | * returns the set of syscalls that are traced /debugged on exit. | |
2065 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2066 | */ |
2067 | ||
c3f6f71d JM |
2068 | sysset_t * |
2069 | proc_get_traced_sysexit (pi, save) | |
2070 | procinfo *pi; | |
2071 | sysset_t *save; | |
c906108c | 2072 | { |
c3f6f71d JM |
2073 | sysset_t * ret = NULL; |
2074 | ||
2075 | /* | |
2076 | * We should never have to apply this operation to any procinfo | |
2077 | * except the one for the main process. If that ever changes | |
2078 | * for any reason, then take out the following clause and | |
2079 | * replace it with one that makes sure the ctl_fd is open. | |
2080 | */ | |
2081 | ||
2082 | if (pi->tid != 0) | |
2083 | pi = find_procinfo_or_die (pi->pid, 0); | |
2084 | ||
2085 | #ifdef NEW_PROC_API | |
2086 | if (!pi->status_valid) | |
2087 | if (!proc_get_status (pi)) | |
2088 | return NULL; | |
2089 | ||
2090 | ret = &pi->prstatus.pr_sysexit; | |
2091 | #else | |
2092 | { | |
2093 | static sysset_t sysexit; | |
c5aa993b | 2094 | |
c3f6f71d JM |
2095 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2096 | ret = &sysexit; | |
2097 | } | |
2098 | #endif | |
2099 | if (save && ret) | |
2100 | memcpy (save, ret, sizeof (sysset_t)); | |
2101 | ||
2102 | return ret; | |
2103 | } | |
c906108c | 2104 | |
c3f6f71d JM |
2105 | /* |
2106 | * Function: proc_clear_current_fault | |
2107 | * | |
2108 | * The current fault (if any) is cleared; the associated signal | |
2109 | * will not be sent to the process or LWP when it resumes. | |
2110 | * Returns non-zero for success, zero for failure. | |
2111 | */ | |
c906108c | 2112 | |
c3f6f71d JM |
2113 | int |
2114 | proc_clear_current_fault (pi) | |
2115 | procinfo *pi; | |
2116 | { | |
2117 | int win; | |
2118 | ||
2119 | /* | |
2120 | * We should never have to apply this operation to any procinfo | |
2121 | * except the one for the main process. If that ever changes | |
2122 | * for any reason, then take out the following clause and | |
2123 | * replace it with one that makes sure the ctl_fd is open. | |
2124 | */ | |
2125 | ||
2126 | if (pi->tid != 0) | |
2127 | pi = find_procinfo_or_die (pi->pid, 0); | |
2128 | ||
2129 | #ifdef NEW_PROC_API | |
2130 | { | |
6c1a54b2 | 2131 | long cmd = PCCFAULT; |
c3f6f71d JM |
2132 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2133 | } | |
2134 | #else | |
2135 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2136 | #endif | |
2137 | ||
2138 | return win; | |
c906108c SS |
2139 | } |
2140 | ||
2141 | /* | |
c3f6f71d JM |
2142 | * Function: proc_set_current_signal |
2143 | * | |
2144 | * Set the "current signal" that will be delivered next to the process. | |
2145 | * NOTE: semantics are different from those of KILL. | |
2146 | * This signal will be delivered to the process or LWP | |
2147 | * immediately when it is resumed (even if the signal is held/blocked); | |
2148 | * it will NOT immediately cause another event of interest, and will NOT | |
2149 | * first trap back to the debugger. | |
2150 | * | |
2151 | * Returns non-zero for success, zero for failure. | |
2152 | */ | |
2153 | ||
2154 | int | |
2155 | proc_set_current_signal (pi, signo) | |
2156 | procinfo *pi; | |
2157 | int signo; | |
2158 | { | |
2159 | int win; | |
2160 | struct { | |
6c1a54b2 | 2161 | long cmd; |
c3f6f71d JM |
2162 | /* Use char array to avoid alignment issues. */ |
2163 | char sinfo[sizeof (struct siginfo)]; | |
2164 | } arg; | |
2165 | struct siginfo *mysinfo; | |
2166 | ||
2167 | /* | |
2168 | * We should never have to apply this operation to any procinfo | |
2169 | * except the one for the main process. If that ever changes | |
2170 | * for any reason, then take out the following clause and | |
2171 | * replace it with one that makes sure the ctl_fd is open. | |
2172 | */ | |
2173 | ||
2174 | if (pi->tid != 0) | |
2175 | pi = find_procinfo_or_die (pi->pid, 0); | |
2176 | ||
2177 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2178 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2179 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2180 | * it messes up the current signal. Work around the kernel bug. | |
2181 | */ | |
2182 | if (signo > 0 && | |
2183 | signo == proc_cursig (pi)) | |
2184 | return 1; /* I assume this is a success? */ | |
2185 | #endif | |
2186 | ||
2187 | /* The pointer is just a type alias. */ | |
2188 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2189 | mysinfo->si_signo = signo; | |
2190 | mysinfo->si_code = 0; | |
2191 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2192 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2193 | ||
2194 | #ifdef NEW_PROC_API | |
2195 | arg.cmd = PCSSIG; | |
2196 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2197 | #else | |
2198 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2199 | #endif | |
c906108c | 2200 | |
c3f6f71d JM |
2201 | return win; |
2202 | } | |
c906108c | 2203 | |
c3f6f71d JM |
2204 | /* |
2205 | * Function: proc_clear_current_signal | |
2206 | * | |
2207 | * The current signal (if any) is cleared, and | |
2208 | * is not sent to the process or LWP when it resumes. | |
2209 | * Returns non-zero for success, zero for failure. | |
2210 | */ | |
c906108c | 2211 | |
c3f6f71d JM |
2212 | int |
2213 | proc_clear_current_signal (pi) | |
2214 | procinfo *pi; | |
2215 | { | |
2216 | int win; | |
2217 | ||
2218 | /* | |
2219 | * We should never have to apply this operation to any procinfo | |
2220 | * except the one for the main process. If that ever changes | |
2221 | * for any reason, then take out the following clause and | |
2222 | * replace it with one that makes sure the ctl_fd is open. | |
2223 | */ | |
2224 | ||
2225 | if (pi->tid != 0) | |
2226 | pi = find_procinfo_or_die (pi->pid, 0); | |
2227 | ||
2228 | #ifdef NEW_PROC_API | |
2229 | { | |
2230 | struct { | |
6c1a54b2 | 2231 | long cmd; |
c3f6f71d JM |
2232 | /* Use char array to avoid alignment issues. */ |
2233 | char sinfo[sizeof (struct siginfo)]; | |
2234 | } arg; | |
2235 | struct siginfo *mysinfo; | |
2236 | ||
2237 | arg.cmd = PCSSIG; | |
2238 | /* The pointer is just a type alias. */ | |
2239 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2240 | mysinfo->si_signo = 0; | |
2241 | mysinfo->si_code = 0; | |
2242 | mysinfo->si_errno = 0; | |
2243 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2244 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2245 | ||
2246 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2247 | } | |
2248 | #else | |
2249 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2250 | #endif | |
c906108c | 2251 | |
c3f6f71d JM |
2252 | return win; |
2253 | } | |
c906108c | 2254 | |
c3f6f71d JM |
2255 | /* |
2256 | * Function: proc_get_gregs | |
2257 | * | |
2258 | * Get the general registers for the process or LWP. | |
2259 | * Returns non-zero for success, zero for failure. | |
2260 | */ | |
c906108c | 2261 | |
c3f6f71d JM |
2262 | gdb_gregset_t * |
2263 | proc_get_gregs (pi) | |
2264 | procinfo *pi; | |
2265 | { | |
2266 | if (!pi->status_valid || !pi->gregs_valid) | |
2267 | if (!proc_get_status (pi)) | |
2268 | return NULL; | |
2269 | ||
2270 | /* | |
2271 | * OK, sorry about the ifdef's. | |
2272 | * There's three cases instead of two, because | |
2273 | * in this instance Unixware and Solaris/RW differ. | |
2274 | */ | |
2275 | ||
2276 | #ifdef NEW_PROC_API | |
2277 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2278 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2279 | #else /* not Unixware */ | |
2280 | return &pi->prstatus.pr_lwp.pr_reg; | |
2281 | #endif /* Unixware */ | |
2282 | #else /* not NEW_PROC_API */ | |
2283 | return &pi->prstatus.pr_reg; | |
2284 | #endif /* NEW_PROC_API */ | |
2285 | } | |
c5aa993b | 2286 | |
c3f6f71d JM |
2287 | /* |
2288 | * Function: proc_get_fpregs | |
2289 | * | |
2290 | * Get the floating point registers for the process or LWP. | |
2291 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2292 | */ |
2293 | ||
c3f6f71d JM |
2294 | gdb_fpregset_t * |
2295 | proc_get_fpregs (pi) | |
2296 | procinfo *pi; | |
c906108c | 2297 | { |
c3f6f71d JM |
2298 | #ifdef NEW_PROC_API |
2299 | if (!pi->status_valid || !pi->fpregs_valid) | |
2300 | if (!proc_get_status (pi)) | |
2301 | return NULL; | |
2302 | ||
2303 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2304 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2305 | #else | |
2306 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2307 | #endif /* Unixware */ | |
c5aa993b | 2308 | |
c3f6f71d JM |
2309 | #else /* not NEW_PROC_API */ |
2310 | if (pi->fpregs_valid) | |
2311 | return &pi->fpregset; /* already got 'em */ | |
2312 | else | |
c906108c | 2313 | { |
c3f6f71d JM |
2314 | if (pi->ctl_fd == 0 && |
2315 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2316 | { |
c3f6f71d | 2317 | return NULL; |
c906108c | 2318 | } |
c3f6f71d | 2319 | else |
c906108c | 2320 | { |
c3f6f71d JM |
2321 | #ifdef PIOCTGFPREG |
2322 | struct { | |
2323 | long pr_count; | |
2324 | tid_t pr_error_thread; | |
2325 | tfpregset_t thread_1; | |
2326 | } thread_fpregs; | |
2327 | ||
2328 | thread_fpregs.pr_count = 1; | |
2329 | thread_fpregs.thread_1.tid = pi->tid; | |
2330 | ||
2331 | if (pi->tid == 0 && | |
2332 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2333 | { | |
2334 | pi->fpregs_valid = 1; | |
2335 | return &pi->fpregset; /* got 'em now! */ | |
2336 | } | |
2337 | else if (pi->tid != 0 && | |
2338 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2339 | { | |
2340 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2341 | sizeof (pi->fpregset)); | |
2342 | pi->fpregs_valid = 1; | |
2343 | return &pi->fpregset; /* got 'em now! */ | |
2344 | } | |
2345 | else | |
2346 | { | |
2347 | return NULL; | |
2348 | } | |
2349 | #else | |
2350 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2351 | { | |
2352 | pi->fpregs_valid = 1; | |
2353 | return &pi->fpregset; /* got 'em now! */ | |
2354 | } | |
2355 | else | |
2356 | { | |
2357 | return NULL; | |
2358 | } | |
2359 | #endif | |
c906108c | 2360 | } |
c906108c | 2361 | } |
c3f6f71d | 2362 | #endif |
c906108c SS |
2363 | } |
2364 | ||
c3f6f71d JM |
2365 | /* |
2366 | * Function: proc_set_gregs | |
2367 | * | |
2368 | * Write the general registers back to the process or LWP. | |
2369 | * Returns non-zero for success, zero for failure. | |
2370 | */ | |
2371 | ||
2372 | int | |
2373 | proc_set_gregs (pi) | |
2374 | procinfo *pi; | |
c906108c | 2375 | { |
c3f6f71d JM |
2376 | gdb_gregset_t *gregs; |
2377 | int win; | |
c5aa993b | 2378 | |
c3f6f71d JM |
2379 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2380 | return 0; /* get_regs has already warned */ | |
2381 | ||
2382 | if (pi->ctl_fd == 0 && | |
2383 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2384 | { |
c3f6f71d | 2385 | return 0; |
c906108c | 2386 | } |
c3f6f71d | 2387 | else |
c906108c | 2388 | { |
c3f6f71d JM |
2389 | #ifdef NEW_PROC_API |
2390 | struct { | |
6c1a54b2 | 2391 | long cmd; |
c3f6f71d JM |
2392 | /* Use char array to avoid alignment issues. */ |
2393 | char gregs[sizeof (gdb_gregset_t)]; | |
2394 | } arg; | |
2395 | ||
2396 | arg.cmd = PCSREG; | |
2397 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2398 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2399 | #else | |
2400 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2401 | #endif | |
c906108c | 2402 | } |
c3f6f71d JM |
2403 | |
2404 | /* Policy: writing the regs invalidates our cache. */ | |
2405 | pi->gregs_valid = 0; | |
2406 | return win; | |
c906108c SS |
2407 | } |
2408 | ||
c3f6f71d JM |
2409 | /* |
2410 | * Function: proc_set_fpregs | |
2411 | * | |
2412 | * Modify the floating point register set of the process or LWP. | |
2413 | * Returns non-zero for success, zero for failure. | |
2414 | */ | |
2415 | ||
2416 | int | |
2417 | proc_set_fpregs (pi) | |
2418 | procinfo *pi; | |
c906108c | 2419 | { |
c3f6f71d JM |
2420 | gdb_fpregset_t *fpregs; |
2421 | int win; | |
2422 | ||
2423 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2424 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2425 | |
c3f6f71d JM |
2426 | if (pi->ctl_fd == 0 && |
2427 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2428 | { |
c3f6f71d | 2429 | return 0; |
c906108c | 2430 | } |
c3f6f71d | 2431 | else |
c906108c | 2432 | { |
c3f6f71d JM |
2433 | #ifdef NEW_PROC_API |
2434 | struct { | |
6c1a54b2 | 2435 | long cmd; |
c3f6f71d JM |
2436 | /* Use char array to avoid alignment issues. */ |
2437 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2438 | } arg; | |
2439 | ||
2440 | arg.cmd = PCSFPREG; | |
2441 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2442 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2443 | #else | |
2444 | #ifdef PIOCTSFPREG | |
2445 | if (pi->tid == 0) | |
2446 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2447 | else | |
2448 | { | |
2449 | struct { | |
2450 | long pr_count; | |
2451 | tid_t pr_error_thread; | |
2452 | tfpregset_t thread_1; | |
2453 | } thread_fpregs; | |
2454 | ||
2455 | thread_fpregs.pr_count = 1; | |
2456 | thread_fpregs.thread_1.tid = pi->tid; | |
2457 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2458 | sizeof (*fpregs)); | |
2459 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2460 | } | |
2461 | #else | |
2462 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2463 | #endif /* osf PIOCTSFPREG */ | |
2464 | #endif /* NEW_PROC_API */ | |
c906108c | 2465 | } |
c3f6f71d JM |
2466 | |
2467 | /* Policy: writing the regs invalidates our cache. */ | |
2468 | pi->fpregs_valid = 0; | |
2469 | return win; | |
c906108c SS |
2470 | } |
2471 | ||
2472 | /* | |
c3f6f71d JM |
2473 | * Function: proc_kill |
2474 | * | |
2475 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2476 | * Returns non-zero for success, zero for failure. | |
2477 | */ | |
c906108c | 2478 | |
c3f6f71d JM |
2479 | int |
2480 | proc_kill (pi, signo) | |
2481 | procinfo *pi; | |
2482 | int signo; | |
2483 | { | |
2484 | int win; | |
c906108c | 2485 | |
c3f6f71d JM |
2486 | /* |
2487 | * We might conceivably apply this operation to an LWP, and | |
2488 | * the LWP's ctl file descriptor might not be open. | |
2489 | */ | |
c906108c | 2490 | |
c3f6f71d JM |
2491 | if (pi->ctl_fd == 0 && |
2492 | open_procinfo_files (pi, FD_CTL) == 0) | |
2493 | { | |
2494 | return 0; | |
2495 | } | |
2496 | else | |
2497 | { | |
2498 | #ifdef NEW_PROC_API | |
6c1a54b2 | 2499 | long cmd[2]; |
c906108c | 2500 | |
c3f6f71d JM |
2501 | cmd[0] = PCKILL; |
2502 | cmd[1] = signo; | |
2503 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2504 | #else /* ioctl method */ | |
2505 | /* FIXME: do I need the Alpha OSF fixups present in | |
2506 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2507 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2508 | #endif | |
2509 | } | |
c906108c | 2510 | |
c3f6f71d JM |
2511 | return win; |
2512 | } | |
c906108c | 2513 | |
c3f6f71d JM |
2514 | /* |
2515 | * Function: proc_parent_pid | |
2516 | * | |
2517 | * Find the pid of the process that started this one. | |
2518 | * Returns the parent process pid, or zero. | |
c906108c SS |
2519 | */ |
2520 | ||
c3f6f71d JM |
2521 | int |
2522 | proc_parent_pid (pi) | |
2523 | procinfo *pi; | |
c906108c | 2524 | { |
c3f6f71d JM |
2525 | /* |
2526 | * We should never have to apply this operation to any procinfo | |
2527 | * except the one for the main process. If that ever changes | |
2528 | * for any reason, then take out the following clause and | |
2529 | * replace it with one that makes sure the ctl_fd is open. | |
2530 | */ | |
2531 | ||
2532 | if (pi->tid != 0) | |
2533 | pi = find_procinfo_or_die (pi->pid, 0); | |
2534 | ||
2535 | if (!pi->status_valid) | |
2536 | if (!proc_get_status (pi)) | |
2537 | return 0; | |
c5aa993b | 2538 | |
c3f6f71d JM |
2539 | return pi->prstatus.pr_ppid; |
2540 | } | |
2541 | ||
2542 | ||
2543 | /* | |
2544 | * Function: proc_set_watchpoint | |
2545 | * | |
2546 | */ | |
2547 | ||
2548 | int | |
2549 | proc_set_watchpoint (pi, addr, len, wflags) | |
03905a3c MS |
2550 | procinfo *pi; |
2551 | CORE_ADDR addr; | |
c3f6f71d JM |
2552 | int len; |
2553 | int wflags; | |
2554 | { | |
2555 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2556 | return 0; | |
2557 | #else | |
2558 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2559 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2560 | return 0; | |
2561 | #else | |
2562 | struct { | |
6c1a54b2 | 2563 | long cmd; |
c3f6f71d JM |
2564 | char watch[sizeof (prwatch_t)]; |
2565 | } arg; | |
2566 | prwatch_t *pwatch; | |
2567 | ||
2568 | pwatch = (prwatch_t *) &arg.watch; | |
2569 | pwatch->pr_vaddr = addr; | |
2570 | pwatch->pr_size = len; | |
2571 | pwatch->pr_wflags = wflags; | |
2572 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2573 | arg.cmd = PCWATCH; | |
2574 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2575 | #else | |
2576 | #if defined (PIOCSWATCH) | |
2577 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2578 | #else | |
2579 | return 0; /* Fail */ | |
2580 | #endif | |
2581 | #endif | |
2582 | #endif | |
2583 | #endif | |
c906108c SS |
2584 | } |
2585 | ||
2586 | /* | |
c3f6f71d JM |
2587 | * Function: proc_iterate_over_mappings |
2588 | * | |
2589 | * Given a pointer to a function, call that function once for every | |
2590 | * mapped address space in the process. The callback function | |
2591 | * receives an open file descriptor for the file corresponding to | |
2592 | * that mapped address space (if there is one), and the base address | |
2593 | * of the mapped space. Quit when the callback function returns a | |
2594 | * nonzero value, or at teh end of the mappings. | |
2595 | * | |
2596 | * Returns: the first non-zero return value of the callback function, | |
2597 | * or zero. | |
2598 | */ | |
c906108c | 2599 | |
c3f6f71d JM |
2600 | /* FIXME: it's probably a waste to cache this FD. |
2601 | It doesn't get called that often... and if I open it | |
2602 | every time, I don't need to lseek it. */ | |
2603 | int | |
2604 | proc_iterate_over_mappings (func) | |
2605 | int (*func) PARAMS ((int, CORE_ADDR)); | |
2606 | { | |
2607 | struct prmap *map; | |
2608 | procinfo *pi; | |
0d06e24b | 2609 | #ifndef NEW_PROC_API /* avoid compiler warning */ |
0fda6bd2 JM |
2610 | int nmaps = 0; |
2611 | int i; | |
2612 | #else | |
2613 | int map_fd; | |
2614 | char pathname[MAX_PROC_NAME_SIZE]; | |
0d06e24b | 2615 | #endif |
c3f6f71d | 2616 | int funcstat = 0; |
0fda6bd2 | 2617 | int fd; |
c906108c | 2618 | |
c3f6f71d | 2619 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); |
c906108c | 2620 | |
c3f6f71d JM |
2621 | #ifdef NEW_PROC_API |
2622 | /* Open map fd. */ | |
2623 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
2624 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
2625 | proc_error (pi, "proc_iterate_over_mappings (open)", __LINE__); | |
c906108c | 2626 | |
c3f6f71d | 2627 | /* Make sure it gets closed again. */ |
004527cb | 2628 | make_cleanup_close (map_fd); |
c906108c | 2629 | |
c3f6f71d JM |
2630 | /* Allocate space for mapping (lifetime only for this function). */ |
2631 | map = alloca (sizeof (struct prmap)); | |
c906108c | 2632 | |
c3f6f71d JM |
2633 | /* Now read the mappings from the file, |
2634 | open a file descriptor for those that have a name, | |
2635 | and call the callback function. */ | |
2636 | while (read (map_fd, | |
2637 | (void *) map, | |
2638 | sizeof (struct prmap)) == sizeof (struct prmap)) | |
2639 | { | |
2640 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
c906108c | 2641 | |
c3f6f71d JM |
2642 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
2643 | break; /* sanity */ | |
c906108c | 2644 | |
c3f6f71d JM |
2645 | if (map->pr_mapname[0] == 0) |
2646 | { | |
2647 | fd = -1; /* no map file */ | |
2648 | } | |
2649 | else | |
2650 | { | |
2651 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
2652 | /* Note: caller's responsibility to close this fd! */ | |
2653 | fd = open (name, O_RDONLY); | |
2654 | /* Note: we don't test the above call for failure; | |
2655 | we just pass the FD on as given. Sometimes there is | |
2656 | no file, so the ioctl may return failure, but that's | |
2657 | not a problem. */ | |
2658 | } | |
c906108c | 2659 | |
c3f6f71d JM |
2660 | /* Stop looping if the callback returns non-zero. */ |
2661 | if ((funcstat = (*func) (fd, (CORE_ADDR) map->pr_vaddr)) != 0) | |
2662 | break; | |
2663 | } | |
2664 | #else | |
2665 | /* Get the number of mapping entries. */ | |
2666 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmaps) < 0) | |
2667 | proc_error (pi, "proc_iterate_over_mappings (PIOCNMAP)", __LINE__); | |
2668 | ||
2669 | /* Allocate space for mappings (lifetime only this function). */ | |
2670 | map = (struct prmap *) alloca ((nmaps + 1) * sizeof (struct prmap)); | |
2671 | ||
2672 | /* Read in all the mappings. */ | |
2673 | if (ioctl (pi->ctl_fd, PIOCMAP, map) < 0) | |
2674 | proc_error (pi, "proc_iterate_over_mappings (PIOCMAP)", __LINE__); | |
2675 | ||
2676 | /* Now loop through the mappings, open an fd for each, and | |
2677 | call the callback function. */ | |
2678 | for (i = 0; | |
2679 | i < nmaps && map[i].pr_size != 0; | |
2680 | i++) | |
2681 | { | |
2682 | /* Note: caller's responsibility to close this fd! */ | |
2683 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map[i].pr_vaddr); | |
2684 | /* Note: we don't test the above call for failure; | |
2685 | we just pass the FD on as given. Sometimes there is | |
2686 | no file, so the ioctl may return failure, but that's | |
2687 | not a problem. */ | |
2688 | ||
2689 | /* Stop looping if the callback returns non-zero. */ | |
2690 | if ((funcstat = (*func) (fd, (CORE_ADDR) map[i].pr_vaddr)) != 0) | |
2691 | break; | |
2692 | } | |
c906108c | 2693 | #endif |
c906108c | 2694 | |
c3f6f71d JM |
2695 | return funcstat; |
2696 | } | |
c906108c | 2697 | |
c3f6f71d | 2698 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2699 | |
c3f6f71d | 2700 | #include <sys/sysi86.h> |
c906108c | 2701 | |
c3f6f71d JM |
2702 | /* |
2703 | * Function: proc_get_LDT_entry | |
2704 | * | |
2705 | * Inputs: | |
2706 | * procinfo *pi; | |
2707 | * int key; | |
2708 | * | |
2709 | * The 'key' is actually the value of the lower 16 bits of | |
2710 | * the GS register for the LWP that we're interested in. | |
2711 | * | |
2712 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2713 | */ |
2714 | ||
c3f6f71d JM |
2715 | struct ssd * |
2716 | proc_get_LDT_entry (pi, key) | |
2717 | procinfo *pi; | |
2718 | int key; | |
c906108c | 2719 | { |
c3f6f71d JM |
2720 | static struct ssd *ldt_entry = NULL; |
2721 | #ifdef NEW_PROC_API | |
2722 | char pathname[MAX_PROC_NAME_SIZE]; | |
2723 | struct cleanup *old_chain = NULL; | |
2724 | int fd; | |
2725 | ||
2726 | /* Allocate space for one LDT entry. | |
2727 | This alloc must persist, because we return a pointer to it. */ | |
2728 | if (ldt_entry == NULL) | |
2729 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2730 | ||
2731 | /* Open the file descriptor for the LDT table. */ | |
2732 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
2733 | if ((fd = open (pathname, O_RDONLY)) < 0) | |
c906108c | 2734 | { |
c3f6f71d JM |
2735 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2736 | return NULL; | |
c906108c | 2737 | } |
c3f6f71d | 2738 | /* Make sure it gets closed again! */ |
004527cb | 2739 | old_chain = make_cleanup_close (fd); |
c906108c | 2740 | |
c3f6f71d JM |
2741 | /* Now 'read' thru the table, find a match and return it. */ |
2742 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2743 | { |
c3f6f71d JM |
2744 | if (ldt_entry->sel == 0 && |
2745 | ldt_entry->bo == 0 && | |
2746 | ldt_entry->acc1 == 0 && | |
2747 | ldt_entry->acc2 == 0) | |
2748 | break; /* end of table */ | |
2749 | /* If key matches, return this entry. */ | |
2750 | if (ldt_entry->sel == key) | |
2751 | return ldt_entry; | |
c906108c | 2752 | } |
c3f6f71d JM |
2753 | /* Loop ended, match not found. */ |
2754 | return NULL; | |
2755 | #else | |
2756 | int nldt, i; | |
2757 | static int nalloc = 0; | |
c906108c | 2758 | |
c3f6f71d JM |
2759 | /* Get the number of LDT entries. */ |
2760 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2761 | { |
c3f6f71d JM |
2762 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2763 | return NULL; | |
c906108c SS |
2764 | } |
2765 | ||
c3f6f71d JM |
2766 | /* Allocate space for the number of LDT entries. */ |
2767 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2768 | if (nldt > nalloc) | |
c906108c | 2769 | { |
c3f6f71d JM |
2770 | ldt_entry = (struct ssd *) |
2771 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
2772 | nalloc = nldt; | |
2773 | } | |
2774 | ||
2775 | /* Read the whole table in one gulp. */ | |
2776 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2777 | { | |
2778 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2779 | return NULL; | |
c906108c SS |
2780 | } |
2781 | ||
c3f6f71d JM |
2782 | /* Search the table and return the (first) entry matching 'key'. */ |
2783 | for (i = 0; i < nldt; i++) | |
2784 | if (ldt_entry[i].sel == key) | |
2785 | return &ldt_entry[i]; | |
c906108c | 2786 | |
c3f6f71d JM |
2787 | /* Loop ended, match not found. */ |
2788 | return NULL; | |
2789 | #endif | |
2790 | } | |
c906108c | 2791 | |
c3f6f71d | 2792 | #endif /* TM_I386SOL2_H */ |
c906108c | 2793 | |
c3f6f71d | 2794 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2795 | |
c3f6f71d | 2796 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2797 | |
c3f6f71d JM |
2798 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2799 | since there is a different way to do threads on every OS. */ | |
c906108c | 2800 | |
c3f6f71d JM |
2801 | /* |
2802 | * Function: proc_get_nthreads | |
2803 | * | |
2804 | * Return the number of threads for the process | |
2805 | */ | |
c906108c | 2806 | |
c3f6f71d JM |
2807 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
2808 | /* | |
2809 | * OSF version | |
2810 | */ | |
2811 | int | |
2812 | proc_get_nthreads (pi) | |
2813 | procinfo *pi; | |
2814 | { | |
2815 | int nthreads = 0; | |
c906108c | 2816 | |
c3f6f71d JM |
2817 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2818 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2819 | |
c3f6f71d | 2820 | return nthreads; |
c906108c SS |
2821 | } |
2822 | ||
c3f6f71d JM |
2823 | #else |
2824 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2825 | /* | |
2826 | * Solaris and Unixware version | |
2827 | */ | |
2828 | int | |
2829 | proc_get_nthreads (pi) | |
2830 | procinfo *pi; | |
c906108c | 2831 | { |
c3f6f71d JM |
2832 | if (!pi->status_valid) |
2833 | if (!proc_get_status (pi)) | |
2834 | return 0; | |
c5aa993b | 2835 | |
c3f6f71d JM |
2836 | /* |
2837 | * NEW_PROC_API: only works for the process procinfo, | |
2838 | * because the LWP procinfos do not get prstatus filled in. | |
2839 | */ | |
2840 | #ifdef NEW_PROC_API | |
2841 | if (pi->tid != 0) /* find the parent process procinfo */ | |
2842 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 2843 | #endif |
c3f6f71d | 2844 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2845 | } |
2846 | ||
c3f6f71d JM |
2847 | #else |
2848 | /* | |
2849 | * Default version | |
2850 | */ | |
2851 | int | |
2852 | proc_get_nthreads (pi) | |
2853 | procinfo *pi; | |
c906108c | 2854 | { |
c3f6f71d JM |
2855 | return 0; |
2856 | } | |
2857 | #endif | |
2858 | #endif | |
2859 | ||
2860 | /* | |
2861 | * Function: proc_get_current_thread (LWP version) | |
2862 | * | |
2863 | * Return the ID of the thread that had an event of interest. | |
2864 | * (ie. the one that hit a breakpoint or other traced event). | |
2865 | * All other things being equal, this should be the ID of a | |
2866 | * thread that is currently executing. | |
2867 | */ | |
2868 | ||
2869 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2870 | /* | |
2871 | * Solaris and Unixware version | |
2872 | */ | |
2873 | int | |
2874 | proc_get_current_thread (pi) | |
2875 | procinfo *pi; | |
2876 | { | |
2877 | /* | |
2878 | * Note: this should be applied to the root procinfo for the process, | |
2879 | * not to the procinfo for an LWP. If applied to the procinfo for | |
2880 | * an LWP, it will simply return that LWP's ID. In that case, | |
2881 | * find the parent process procinfo. | |
2882 | */ | |
2883 | ||
2884 | if (pi->tid != 0) | |
2885 | pi = find_procinfo_or_die (pi->pid, 0); | |
2886 | ||
2887 | if (!pi->status_valid) | |
2888 | if (!proc_get_status (pi)) | |
2889 | return 0; | |
2890 | ||
2891 | #ifdef NEW_PROC_API | |
2892 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2893 | #else |
c3f6f71d | 2894 | return pi->prstatus.pr_who; |
c906108c | 2895 | #endif |
c3f6f71d | 2896 | } |
c906108c | 2897 | |
c3f6f71d JM |
2898 | #else |
2899 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
2900 | /* | |
2901 | * OSF version | |
2902 | */ | |
2903 | int | |
2904 | proc_get_current_thread (pi) | |
2905 | procinfo *pi; | |
2906 | { | |
2907 | #if 0 /* FIXME: not ready for prime time? */ | |
2908 | return pi->prstatus.pr_tid; | |
2909 | #else | |
2910 | return 0; | |
2911 | #endif | |
c906108c SS |
2912 | } |
2913 | ||
c3f6f71d JM |
2914 | #else |
2915 | /* | |
2916 | * Default version | |
2917 | */ | |
2918 | int | |
2919 | proc_get_current_thread (pi) | |
2920 | procinfo *pi; | |
c906108c | 2921 | { |
c3f6f71d JM |
2922 | return 0; |
2923 | } | |
2924 | ||
2925 | #endif | |
2926 | #endif | |
c906108c | 2927 | |
c3f6f71d JM |
2928 | /* |
2929 | * Function: proc_update_threads | |
2930 | * | |
2931 | * Discover the IDs of all the threads within the process, and | |
2932 | * create a procinfo for each of them (chained to the parent). | |
2933 | * | |
2934 | * This unfortunately requires a different method on every OS. | |
2935 | * | |
2936 | * Return: non-zero for success, zero for failure. | |
2937 | */ | |
c906108c | 2938 | |
c3f6f71d JM |
2939 | int |
2940 | proc_delete_dead_threads (parent, thread, ignore) | |
2941 | procinfo *parent; | |
2942 | procinfo *thread; | |
2943 | void *ignore; | |
2944 | { | |
2945 | if (thread && parent) /* sanity */ | |
c906108c | 2946 | { |
c3f6f71d JM |
2947 | thread->status_valid = 0; |
2948 | if (!proc_get_status (thread)) | |
2949 | destroy_one_procinfo (&parent->thread_list, thread); | |
2950 | } | |
2951 | return 0; /* keep iterating */ | |
2952 | } | |
c5aa993b | 2953 | |
c3f6f71d JM |
2954 | #if defined (PIOCLSTATUS) |
2955 | /* | |
2956 | * Solaris 2.5 (ioctl) version | |
2957 | */ | |
2958 | int | |
2959 | proc_update_threads (pi) | |
2960 | procinfo *pi; | |
2961 | { | |
2962 | gdb_prstatus_t *prstatus; | |
2963 | struct cleanup *old_chain = NULL; | |
2964 | procinfo *thread; | |
2965 | int nlwp, i; | |
2966 | ||
2967 | /* | |
2968 | * We should never have to apply this operation to any procinfo | |
2969 | * except the one for the main process. If that ever changes | |
2970 | * for any reason, then take out the following clause and | |
2971 | * replace it with one that makes sure the ctl_fd is open. | |
2972 | */ | |
2973 | ||
2974 | if (pi->tid != 0) | |
2975 | pi = find_procinfo_or_die (pi->pid, 0); | |
2976 | ||
2977 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2978 | ||
2979 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2980 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2981 | ||
2982 | if ((prstatus = (gdb_prstatus_t *) | |
2983 | malloc (sizeof (gdb_prstatus_t) * (nlwp + 1))) == 0) | |
2984 | perror_with_name ("procfs: malloc failed in update_threads"); | |
2985 | ||
2986 | old_chain = make_cleanup (free, prstatus); | |
2987 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) | |
2988 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2989 | ||
2990 | /* Skip element zero, which represents the process as a whole. */ | |
2991 | for (i = 1; i < nlwp + 1; i++) | |
2992 | { | |
2993 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2994 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2995 | |
c3f6f71d JM |
2996 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2997 | thread->status_valid = 1; | |
2998 | } | |
2999 | pi->threads_valid = 1; | |
3000 | do_cleanups (old_chain); | |
3001 | return 1; | |
3002 | } | |
3003 | #else | |
3004 | #ifdef NEW_PROC_API | |
3005 | /* | |
3006 | * Unixware and Solaris 6 (and later) version | |
3007 | */ | |
004527cb AC |
3008 | static void |
3009 | do_closedir_cleanup (void *dir) | |
3010 | { | |
3011 | closedir (dir); | |
3012 | } | |
3013 | ||
c3f6f71d JM |
3014 | int |
3015 | proc_update_threads (pi) | |
3016 | procinfo *pi; | |
3017 | { | |
3018 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3019 | struct dirent *direntry; | |
3020 | struct cleanup *old_chain = NULL; | |
3021 | procinfo *thread; | |
3022 | DIR *dirp; | |
3023 | int lwpid; | |
3024 | ||
3025 | /* | |
3026 | * We should never have to apply this operation to any procinfo | |
3027 | * except the one for the main process. If that ever changes | |
3028 | * for any reason, then take out the following clause and | |
3029 | * replace it with one that makes sure the ctl_fd is open. | |
3030 | */ | |
3031 | ||
3032 | if (pi->tid != 0) | |
3033 | pi = find_procinfo_or_die (pi->pid, 0); | |
3034 | ||
3035 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3036 | ||
3037 | /* | |
3038 | * Unixware | |
3039 | * | |
3040 | * Note: this brute-force method is the only way I know of | |
3041 | * to accomplish this task on Unixware. This method will | |
3042 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3043 | * and more elegant way to do this on Solaris, but the margins | |
3044 | * of this manuscript are too small to write it here... ;-) | |
3045 | */ | |
3046 | ||
3047 | strcpy (pathname, pi->pathname); | |
3048 | strcat (pathname, "/lwp"); | |
3049 | if ((dirp = opendir (pathname)) == NULL) | |
3050 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3051 | ||
004527cb | 3052 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3053 | while ((direntry = readdir (dirp)) != NULL) |
3054 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3055 | { | |
3056 | lwpid = atoi (&direntry->d_name[0]); | |
3057 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3058 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3059 | } | |
3060 | pi->threads_valid = 1; | |
3061 | do_cleanups (old_chain); | |
3062 | return 1; | |
3063 | } | |
3064 | #else | |
3065 | #ifdef PIOCTLIST | |
3066 | /* | |
3067 | * OSF version | |
3068 | */ | |
3069 | int | |
3070 | proc_update_threads (pi) | |
3071 | procinfo *pi; | |
3072 | { | |
3073 | int nthreads, i; | |
3074 | tid_t *threads; | |
3075 | ||
3076 | /* | |
3077 | * We should never have to apply this operation to any procinfo | |
3078 | * except the one for the main process. If that ever changes | |
3079 | * for any reason, then take out the following clause and | |
3080 | * replace it with one that makes sure the ctl_fd is open. | |
3081 | */ | |
3082 | ||
3083 | if (pi->tid != 0) | |
3084 | pi = find_procinfo_or_die (pi->pid, 0); | |
3085 | ||
3086 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3087 | ||
3088 | nthreads = proc_get_nthreads (pi); | |
3089 | if (nthreads < 2) | |
3090 | return 0; /* nothing to do for 1 or fewer threads */ | |
3091 | ||
3092 | if ((threads = malloc (nthreads * sizeof (tid_t))) == NULL) | |
3093 | proc_error (pi, "update_threads, malloc", __LINE__); | |
3094 | ||
3095 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3096 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3097 | ||
3098 | for (i = 0; i < nthreads; i++) | |
3099 | { | |
3100 | if (!find_procinfo (pi->pid, threads[i])) | |
3101 | if (!create_procinfo (pi->pid, threads[i])) | |
3102 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3103 | } |
c3f6f71d JM |
3104 | pi->threads_valid = 1; |
3105 | return 1; | |
c906108c | 3106 | } |
c3f6f71d JM |
3107 | #else |
3108 | /* | |
3109 | * Default version | |
3110 | */ | |
3111 | int | |
3112 | proc_update_threads (pi) | |
3113 | procinfo *pi; | |
3114 | { | |
3115 | return 0; | |
3116 | } | |
3117 | #endif /* OSF PIOCTLIST */ | |
3118 | #endif /* NEW_PROC_API */ | |
3119 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3120 | |
c3f6f71d JM |
3121 | /* |
3122 | * Function: proc_iterate_over_threads | |
3123 | * | |
3124 | * Description: | |
3125 | * Given a pointer to a function, call that function once | |
3126 | * for each lwp in the procinfo list, until the function | |
3127 | * returns non-zero, in which event return the value | |
3128 | * returned by the function. | |
3129 | * | |
3130 | * Note: this function does NOT call update_threads. | |
3131 | * If you want to discover new threads first, you must | |
3132 | * call that function explicitly. This function just makes | |
3133 | * a quick pass over the currently-known procinfos. | |
3134 | * | |
3135 | * Arguments: | |
3136 | * pi - parent process procinfo | |
3137 | * func - per-thread function | |
3138 | * ptr - opaque parameter for function. | |
3139 | * | |
3140 | * Return: | |
3141 | * First non-zero return value from the callee, or zero. | |
3142 | */ | |
3143 | ||
3144 | int | |
3145 | proc_iterate_over_threads (pi, func, ptr) | |
3146 | procinfo *pi; | |
3147 | int (*func) PARAMS ((procinfo *, procinfo *, void *)); | |
3148 | void *ptr; | |
c906108c | 3149 | { |
c3f6f71d JM |
3150 | procinfo *thread, *next; |
3151 | int retval = 0; | |
c906108c | 3152 | |
c3f6f71d JM |
3153 | /* |
3154 | * We should never have to apply this operation to any procinfo | |
3155 | * except the one for the main process. If that ever changes | |
3156 | * for any reason, then take out the following clause and | |
3157 | * replace it with one that makes sure the ctl_fd is open. | |
3158 | */ | |
3159 | ||
3160 | if (pi->tid != 0) | |
3161 | pi = find_procinfo_or_die (pi->pid, 0); | |
3162 | ||
3163 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3164 | { |
c3f6f71d JM |
3165 | next = thread->next; /* in case thread is destroyed */ |
3166 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3167 | break; | |
c906108c | 3168 | } |
c3f6f71d JM |
3169 | |
3170 | return retval; | |
c906108c SS |
3171 | } |
3172 | ||
c3f6f71d JM |
3173 | /* =================== END, Thread "MODULE" =================== */ |
3174 | ||
3175 | /* =================== END, /proc "MODULE" =================== */ | |
3176 | ||
3177 | /* =================== GDB "MODULE" =================== */ | |
3178 | ||
3179 | /* | |
3180 | * Here are all of the gdb target vector functions and their friends. | |
3181 | */ | |
3182 | ||
3183 | static int do_attach PARAMS ((int pid)); | |
3184 | static void do_detach PARAMS ((int signo)); | |
3185 | static int register_gdb_signals PARAMS ((procinfo *, sigset_t *)); | |
3186 | ||
3187 | /* | |
3188 | * Function: procfs_debug_inferior | |
3189 | * | |
3190 | * Sets up the inferior to be debugged. | |
3191 | * Registers to trace signals, hardware faults, and syscalls. | |
3192 | * Note: does not set RLC flag: caller may want to customize that. | |
3193 | * | |
3194 | * Returns: zero for success (note! unlike most functions in this module) | |
3195 | * On failure, returns the LINE NUMBER where it failed! | |
3196 | */ | |
3197 | ||
3198 | static int | |
3199 | procfs_debug_inferior (pi) | |
3200 | procinfo *pi; | |
c906108c | 3201 | { |
c3f6f71d JM |
3202 | fltset_t traced_faults; |
3203 | sigset_t traced_signals; | |
3204 | sysset_t traced_syscall_entries; | |
3205 | sysset_t traced_syscall_exits; | |
c906108c | 3206 | |
c3f6f71d JM |
3207 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3208 | /* On some systems (OSF), we don't trace hardware faults. | |
3209 | Apparently it's enough that we catch them as signals. | |
3210 | Wonder why we don't just do that in general? */ | |
3211 | premptyset (&traced_faults); /* don't trace faults. */ | |
3212 | #else | |
3213 | /* Register to trace hardware faults in the child. */ | |
3214 | prfillset (&traced_faults); /* trace all faults... */ | |
3215 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3216 | #endif | |
3217 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3218 | return __LINE__; | |
c906108c | 3219 | |
c3f6f71d JM |
3220 | /* Register to trace selected signals in the child. */ |
3221 | premptyset (&traced_signals); | |
3222 | if (!register_gdb_signals (pi, &traced_signals)) | |
3223 | return __LINE__; | |
3224 | ||
3225 | /* Register to trace the 'exit' system call (on entry). */ | |
3226 | premptyset (&traced_syscall_entries); | |
3227 | praddset (&traced_syscall_entries, SYS_exit); | |
3228 | #ifdef SYS_lwpexit | |
3229 | praddset (&traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ | |
3230 | #endif | |
3231 | #ifdef SYS_lwp_exit | |
3232 | praddset (&traced_syscall_entries, SYS_lwp_exit); | |
c906108c SS |
3233 | #endif |
3234 | ||
c3f6f71d JM |
3235 | if (!proc_set_traced_sysentry (pi, &traced_syscall_entries)) |
3236 | return __LINE__; | |
3237 | ||
3238 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3239 | /* OSF method for tracing exec syscalls. Quoting: | |
3240 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3241 | exits from exec system calls because of the user level loader. */ | |
3242 | /* FIXME: make nice and maybe move into an access function. */ | |
3243 | { | |
3244 | int prfs_flags; | |
3245 | ||
3246 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3247 | return __LINE__; | |
3248 | ||
3249 | prfs_flags |= PRFS_STOPEXEC; | |
3250 | ||
3251 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3252 | return __LINE__; | |
3253 | } | |
3254 | #else /* not PRFS_STOPEXEC */ | |
3255 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3256 | /* GW: Rationale... | |
3257 | Not all systems with /proc have all the exec* syscalls with the same | |
3258 | names. On the SGI, for example, there is no SYS_exec, but there | |
3259 | *is* a SYS_execv. So, we try to account for that. */ | |
3260 | ||
3261 | premptyset (&traced_syscall_exits); | |
3262 | #ifdef SYS_exec | |
3263 | praddset (&traced_syscall_exits, SYS_exec); | |
3264 | #endif | |
3265 | #ifdef SYS_execve | |
3266 | praddset (&traced_syscall_exits, SYS_execve); | |
3267 | #endif | |
3268 | #ifdef SYS_execv | |
3269 | praddset (&traced_syscall_exits, SYS_execv); | |
3270 | #endif | |
c5aa993b | 3271 | |
c3f6f71d JM |
3272 | #ifdef SYS_lwpcreate |
3273 | praddset (&traced_syscall_exits, SYS_lwpcreate); | |
3274 | praddset (&traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3275 | #endif |
c5aa993b | 3276 | |
c3f6f71d JM |
3277 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
3278 | praddset (&traced_syscall_exits, SYS_lwp_create); | |
3279 | praddset (&traced_syscall_exits, SYS_lwp_exit); | |
3280 | #endif | |
c5aa993b | 3281 | |
c906108c | 3282 | |
c3f6f71d JM |
3283 | if (!proc_set_traced_sysexit (pi, &traced_syscall_exits)) |
3284 | return __LINE__; | |
3285 | ||
3286 | #endif /* PRFS_STOPEXEC */ | |
3287 | return 0; | |
c906108c SS |
3288 | } |
3289 | ||
c3f6f71d JM |
3290 | static void |
3291 | procfs_attach (args, from_tty) | |
3292 | char *args; | |
3293 | int from_tty; | |
c906108c | 3294 | { |
c3f6f71d JM |
3295 | char *exec_file; |
3296 | int pid; | |
3297 | ||
3298 | if (!args) | |
3299 | error_no_arg ("process-id to attach"); | |
3300 | ||
3301 | pid = atoi (args); | |
3302 | if (pid == getpid ()) | |
3303 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3304 | |
c3f6f71d | 3305 | if (from_tty) |
c906108c | 3306 | { |
c3f6f71d JM |
3307 | exec_file = get_exec_file (0); |
3308 | ||
3309 | if (exec_file) | |
3310 | printf_filtered ("Attaching to program `%s', %s\n", | |
3311 | exec_file, target_pid_to_str (pid)); | |
3312 | else | |
3313 | printf_filtered ("Attaching to %s\n", target_pid_to_str (pid)); | |
3314 | ||
3315 | fflush (stdout); | |
c906108c | 3316 | } |
c3f6f71d JM |
3317 | inferior_pid = do_attach (pid); |
3318 | push_target (&procfs_ops); | |
3319 | } | |
3320 | ||
3321 | static void | |
3322 | procfs_detach (args, from_tty) | |
3323 | char *args; | |
3324 | int from_tty; | |
3325 | { | |
3326 | char *exec_file; | |
3327 | int signo = 0; | |
3328 | ||
3329 | if (from_tty) | |
c906108c | 3330 | { |
c3f6f71d JM |
3331 | exec_file = get_exec_file (0); |
3332 | if (exec_file == 0) | |
3333 | exec_file = ""; | |
3334 | printf_filtered ("Detaching from program: %s %s\n", | |
3335 | exec_file, target_pid_to_str (inferior_pid)); | |
3336 | fflush (stdout); | |
c906108c | 3337 | } |
c3f6f71d JM |
3338 | if (args) |
3339 | signo = atoi (args); | |
3340 | ||
3341 | do_detach (signo); | |
3342 | inferior_pid = 0; | |
3343 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ | |
c906108c SS |
3344 | } |
3345 | ||
c3f6f71d JM |
3346 | static int |
3347 | do_attach (pid) | |
3348 | int pid; | |
c906108c | 3349 | { |
c3f6f71d JM |
3350 | procinfo *pi; |
3351 | int fail; | |
3352 | ||
3353 | if ((pi = create_procinfo (pid, 0)) == NULL) | |
3354 | perror ("procfs: out of memory in 'attach'"); | |
3355 | ||
3356 | if (!open_procinfo_files (pi, FD_CTL)) | |
3357 | { | |
3358 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3359 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
3360 | pid); | |
3361 | dead_procinfo (pi, errmsg, NOKILL); | |
3362 | } | |
c906108c | 3363 | |
c3f6f71d JM |
3364 | /* Stop the process (if it isn't already stopped). */ |
3365 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3366 | { |
c3f6f71d JM |
3367 | pi->was_stopped = 1; |
3368 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3369 | } |
3370 | else | |
3371 | { | |
c3f6f71d JM |
3372 | pi->was_stopped = 0; |
3373 | /* Set the process to run again when we close it. */ | |
3374 | if (!proc_set_run_on_last_close (pi)) | |
3375 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3376 | ||
3377 | /* Now stop the process. */ | |
3378 | if (!proc_stop_process (pi)) | |
3379 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3380 | pi->ignore_next_sigstop = 1; | |
c906108c | 3381 | } |
c3f6f71d JM |
3382 | /* Save some of the /proc state to be restored if we detach. */ |
3383 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3384 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3385 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3386 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
3387 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
3388 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", | |
3389 | NOKILL); | |
3390 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
3391 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", | |
3392 | NOKILL); | |
3393 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3394 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3395 | ||
3396 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3397 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3398 | ||
3399 | /* Let GDB know that the inferior was attached. */ | |
3400 | attach_flag = 1; | |
3401 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3402 | } |
3403 | ||
3404 | static void | |
c3f6f71d JM |
3405 | do_detach (signo) |
3406 | int signo; | |
c906108c | 3407 | { |
c3f6f71d | 3408 | procinfo *pi; |
c906108c | 3409 | |
c3f6f71d JM |
3410 | /* Find procinfo for the main process */ |
3411 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); /* FIXME: threads */ | |
3412 | if (signo) | |
3413 | if (!proc_set_current_signal (pi, signo)) | |
3414 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3415 | |
c3f6f71d JM |
3416 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3417 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3418 | |
c3f6f71d JM |
3419 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3420 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3421 | ||
3422 | if (!proc_set_traced_sysentry (pi, &pi->saved_entryset)) | |
3423 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); | |
3424 | ||
3425 | if (!proc_set_traced_sysexit (pi, &pi->saved_exitset)) | |
3426 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); | |
3427 | ||
3428 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3429 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3430 | ||
3431 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3432 | if (signo || !(pi->was_stopped) || | |
3433 | query ("Was stopped when attached, make it runnable again? ")) | |
3434 | { | |
3435 | /* Clear any pending signal. */ | |
3436 | if (!proc_clear_current_fault (pi)) | |
3437 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3438 | ||
3439 | if (!proc_set_run_on_last_close (pi)) | |
3440 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3441 | } | |
3442 | ||
3443 | attach_flag = 0; | |
3444 | destroy_procinfo (pi); | |
c906108c SS |
3445 | } |
3446 | ||
c3f6f71d JM |
3447 | /* |
3448 | * fetch_registers | |
3449 | * | |
3450 | * Since the /proc interface cannot give us individual registers, | |
3451 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3452 | * This results in the possibility that we will do unnecessarily many | |
3453 | * fetches, since we may be called repeatedly for individual registers. | |
3454 | * So we cache the results, and mark the cache invalid when the process | |
3455 | * is resumed. | |
3456 | */ | |
3457 | ||
c906108c | 3458 | static void |
c3f6f71d JM |
3459 | procfs_fetch_registers (regno) |
3460 | int regno; | |
c906108c | 3461 | { |
c3f6f71d JM |
3462 | gdb_fpregset_t *fpregs; |
3463 | gdb_gregset_t *gregs; | |
3464 | procinfo *pi; | |
3465 | int pid; | |
3466 | int tid; | |
c906108c | 3467 | |
c3f6f71d JM |
3468 | pid = PIDGET (inferior_pid); |
3469 | tid = TIDGET (inferior_pid); | |
3470 | ||
3471 | /* First look up procinfo for the main process. */ | |
3472 | pi = find_procinfo_or_die (pid, 0); | |
3473 | ||
3474 | /* If the event thread is not the same as GDB's requested thread | |
3475 | (ie. inferior_pid), then look up procinfo for the requested | |
3476 | thread. */ | |
3477 | if ((tid != 0) && | |
3478 | (tid != proc_get_current_thread (pi))) | |
3479 | pi = find_procinfo_or_die (pid, tid); | |
3480 | ||
3481 | if (pi == NULL) | |
3482 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
3483 | target_pid_to_str (inferior_pid)); | |
3484 | ||
3485 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3486 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3487 | ||
3488 | supply_gregset (gregs); | |
3489 | ||
60054393 MS |
3490 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3491 | { | |
3492 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3493 | regno == PC_REGNUM || | |
3494 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3495 | regno == FP_REGNUM || | |
3496 | regno == SP_REGNUM) | |
3497 | return; /* not a floating point register */ | |
c5aa993b | 3498 | |
60054393 MS |
3499 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3500 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3501 | |
60054393 MS |
3502 | supply_fpregset (fpregs); |
3503 | } | |
c906108c SS |
3504 | } |
3505 | ||
c3f6f71d JM |
3506 | /* Get ready to modify the registers array. On machines which store |
3507 | individual registers, this doesn't need to do anything. On | |
3508 | machines which store all the registers in one fell swoop, such as | |
3509 | /proc, this makes sure that registers contains all the registers | |
3510 | from the program being debugged. */ | |
3511 | ||
c906108c | 3512 | static void |
c3f6f71d | 3513 | procfs_prepare_to_store () |
c906108c | 3514 | { |
c3f6f71d JM |
3515 | #ifdef CHILD_PREPARE_TO_STORE |
3516 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3517 | #endif |
c906108c SS |
3518 | } |
3519 | ||
3520 | /* | |
c3f6f71d JM |
3521 | * store_registers |
3522 | * | |
3523 | * Since the /proc interface will not read individual registers, | |
3524 | * we will cache these requests until the process is resumed, and | |
3525 | * only then write them back to the inferior process. | |
3526 | * | |
3527 | * FIXME: is that a really bad idea? Have to think about cases | |
3528 | * where writing one register might affect the value of others, etc. | |
3529 | */ | |
c906108c | 3530 | |
c3f6f71d JM |
3531 | static void |
3532 | procfs_store_registers (regno) | |
3533 | int regno; | |
3534 | { | |
3535 | gdb_fpregset_t *fpregs; | |
3536 | gdb_gregset_t *gregs; | |
3537 | procinfo *pi; | |
3538 | int pid; | |
3539 | int tid; | |
c906108c | 3540 | |
c3f6f71d JM |
3541 | pid = PIDGET (inferior_pid); |
3542 | tid = TIDGET (inferior_pid); | |
c906108c | 3543 | |
c3f6f71d JM |
3544 | /* First find procinfo for main process */ |
3545 | pi = find_procinfo_or_die (pid, 0); | |
3546 | ||
3547 | /* If current lwp for process is not the same as requested thread | |
3548 | (ie. inferior_pid), then find procinfo for the requested thread. */ | |
3549 | ||
3550 | if ((tid != 0) && | |
3551 | (tid != proc_get_current_thread (pi))) | |
3552 | pi = find_procinfo_or_die (pid, tid); | |
3553 | ||
3554 | if (pi == NULL) | |
3555 | error ("procfs: store_registers: failed to find procinfo for %s", | |
3556 | target_pid_to_str (inferior_pid)); | |
c906108c | 3557 | |
c3f6f71d JM |
3558 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3559 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3560 | |
c3f6f71d JM |
3561 | fill_gregset (gregs, regno); |
3562 | if (!proc_set_gregs (pi)) | |
3563 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3564 | |
60054393 MS |
3565 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3566 | { | |
3567 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3568 | regno == PC_REGNUM || | |
3569 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3570 | regno == FP_REGNUM || | |
3571 | regno == SP_REGNUM) | |
3572 | return; /* not a floating point register */ | |
3573 | ||
3574 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3575 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3576 | ||
3577 | fill_fpregset (fpregs, regno); | |
3578 | if (!proc_set_fpregs (pi)) | |
3579 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3580 | } | |
c3f6f71d | 3581 | } |
c906108c | 3582 | |
c3f6f71d JM |
3583 | /* |
3584 | * Function: target_wait | |
3585 | * | |
3586 | * Retrieve the next stop event from the child process. | |
3587 | * If child has not stopped yet, wait for it to stop. | |
3588 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3589 | * into gdb internal event codes. | |
3590 | * | |
3591 | * Return: id of process (and possibly thread) that incurred the event. | |
3592 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3593 | */ |
3594 | ||
c3f6f71d JM |
3595 | static int |
3596 | procfs_wait (pid, status) | |
3597 | int pid; | |
3598 | struct target_waitstatus *status; | |
c906108c | 3599 | { |
c3f6f71d JM |
3600 | /* First cut: loosely based on original version 2.1 */ |
3601 | procinfo *pi; | |
3602 | int temp, wstat; | |
3603 | int retval; | |
3604 | int why, what, flags; | |
3605 | int retry = 0; | |
c906108c | 3606 | |
c3f6f71d | 3607 | wait_again: |
c906108c | 3608 | |
c3f6f71d JM |
3609 | retry++; |
3610 | wstat = 0; | |
3611 | retval = -1; | |
c906108c | 3612 | |
c3f6f71d JM |
3613 | /* Find procinfo for main process */ |
3614 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
3615 | if (pi) | |
c906108c | 3616 | { |
c3f6f71d JM |
3617 | /* We must assume that the status is stale now... */ |
3618 | pi->status_valid = 0; | |
3619 | pi->gregs_valid = 0; | |
3620 | pi->fpregs_valid = 0; | |
3621 | ||
3622 | #if 0 /* just try this out... */ | |
3623 | flags = proc_flags (pi); | |
3624 | why = proc_why (pi); | |
3625 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3626 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3627 | #endif | |
3628 | /* If child is not stopped, wait for it to stop. */ | |
3629 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3630 | !proc_wait_for_stop (pi)) | |
c906108c | 3631 | { |
c3f6f71d JM |
3632 | /* wait_for_stop failed: has the child terminated? */ |
3633 | if (errno == ENOENT) | |
c906108c | 3634 | { |
c3f6f71d JM |
3635 | /* /proc file not found; presumably child has terminated. */ |
3636 | retval = wait (&wstat); /* "wait" for the child's exit */ | |
3637 | ||
3638 | if (retval != PIDGET (inferior_pid)) /* wrong child? */ | |
3639 | error ("procfs: couldn't stop process %d: wait returned %d\n", | |
3640 | inferior_pid, retval); | |
3641 | /* FIXME: might I not just use waitpid? | |
3642 | Or try find_procinfo to see if I know about this child? */ | |
c906108c | 3643 | } |
c3f6f71d | 3644 | else |
c906108c | 3645 | { |
c3f6f71d JM |
3646 | /* Unknown error from wait_for_stop. */ |
3647 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3648 | } |
c3f6f71d JM |
3649 | } |
3650 | else | |
3651 | { | |
3652 | /* This long block is reached if either: | |
3653 | a) the child was already stopped, or | |
3654 | b) we successfully waited for the child with wait_for_stop. | |
3655 | This block will analyze the /proc status, and translate it | |
3656 | into a waitstatus for GDB. | |
3657 | ||
3658 | If we actually had to call wait because the /proc file | |
3659 | is gone (child terminated), then we skip this block, | |
3660 | because we already have a waitstatus. */ | |
3661 | ||
3662 | flags = proc_flags (pi); | |
3663 | why = proc_why (pi); | |
3664 | what = proc_what (pi); | |
3665 | ||
c3f6f71d | 3666 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3667 | { |
c3f6f71d JM |
3668 | #ifdef PR_ASYNC |
3669 | /* If it's running async (for single_thread control), | |
3670 | set it back to normal again. */ | |
3671 | if (flags & PR_ASYNC) | |
3672 | if (!proc_unset_async (pi)) | |
3673 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3674 | #endif | |
3675 | ||
3676 | if (info_verbose) | |
3677 | proc_prettyprint_why (why, what, 1); | |
3678 | ||
3679 | /* The 'pid' we will return to GDB is composed of | |
3680 | the process ID plus the lwp ID. */ | |
3681 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3682 | ||
3683 | switch (why) { | |
3684 | case PR_SIGNALLED: | |
3685 | wstat = (what << 8) | 0177; | |
3686 | break; | |
3687 | case PR_SYSENTRY: | |
3688 | switch (what) { | |
3689 | #ifdef SYS_lwp_exit | |
3690 | case SYS_lwp_exit: | |
3691 | #endif | |
3692 | #ifdef SYS_lwpexit | |
3693 | case SYS_lwpexit: | |
3694 | #endif | |
3695 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3696 | printf_filtered ("[%s exited]\n", | |
3697 | target_pid_to_str (retval)); | |
3698 | delete_thread (retval); | |
3699 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3700 | return retval; | |
3701 | #endif /* _lwp_exit */ | |
3702 | ||
3703 | case SYS_exit: | |
3704 | /* Handle SYS_exit call only */ | |
3705 | /* Stopped at entry to SYS_exit. | |
3706 | Make it runnable, resume it, then use | |
3707 | the wait system call to get its exit code. | |
3708 | Proc_run_process always clears the current | |
3709 | fault and signal. | |
3710 | Then return its exit status. */ | |
3711 | pi->status_valid = 0; | |
3712 | wstat = 0; | |
3713 | /* FIXME: what we should do is return | |
3714 | TARGET_WAITKIND_SPURIOUS. */ | |
3715 | if (!proc_run_process (pi, 0, 0)) | |
3716 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3717 | if (attach_flag) | |
3718 | { | |
3719 | /* Don't call wait: simulate waiting for exit, | |
3720 | return a "success" exit code. Bogus: what if | |
3721 | it returns something else? */ | |
3722 | wstat = 0; | |
02d5252f | 3723 | retval = inferior_pid; /* ? ? ? */ |
c3f6f71d JM |
3724 | } |
3725 | else | |
3726 | { | |
3727 | int temp = wait (&wstat); | |
3728 | ||
3729 | /* FIXME: shouldn't I make sure I get the right | |
3730 | event from the right process? If (for | |
3731 | instance) I have killed an earlier inferior | |
3732 | process but failed to clean up after it | |
3733 | somehow, I could get its termination event | |
3734 | here. */ | |
3735 | ||
3736 | /* If wait returns -1, that's what we return to GDB. */ | |
3737 | if (temp < 0) | |
3738 | retval = temp; | |
3739 | } | |
3740 | break; | |
3741 | default: | |
3742 | printf_filtered ("procfs: trapped on entry to "); | |
3743 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3744 | printf_filtered ("\n"); | |
3745 | #ifndef PIOCSSPCACT | |
3746 | { | |
3747 | long i, nsysargs, *sysargs; | |
3748 | ||
3749 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3750 | (sysargs = proc_sysargs (pi)) != NULL) | |
3751 | { | |
0fda6bd2 | 3752 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3753 | for (i = 0; i < nsysargs; i++) |
02d5252f | 3754 | printf_filtered ("#%ld: 0x%08lx\n", |
c3f6f71d JM |
3755 | i, sysargs[i]); |
3756 | } | |
3757 | ||
3758 | } | |
3759 | #endif | |
3760 | if (status) | |
3761 | { | |
3762 | /* How to exit gracefully, returning "unknown event" */ | |
3763 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3764 | return inferior_pid; | |
3765 | } | |
3766 | else | |
3767 | { | |
3768 | /* How to keep going without returning to wfi: */ | |
3769 | target_resume (pid, 0, TARGET_SIGNAL_0); | |
3770 | goto wait_again; | |
3771 | } | |
3772 | break; | |
3773 | } | |
3774 | break; | |
3775 | case PR_SYSEXIT: | |
3776 | switch (what) { | |
3777 | #ifdef SYS_exec | |
3778 | case SYS_exec: | |
3779 | #endif | |
3780 | #ifdef SYS_execv | |
3781 | case SYS_execv: | |
3782 | #endif | |
3783 | #ifdef SYS_execve | |
3784 | case SYS_execve: | |
3785 | #endif | |
3786 | /* Hopefully this is our own "fork-child" execing | |
3787 | the real child. Hoax this event into a trap, and | |
3788 | GDB will see the child about to execute its start | |
3789 | address. */ | |
3790 | wstat = (SIGTRAP << 8) | 0177; | |
3791 | break; | |
3792 | #ifdef SYS_lwp_create | |
3793 | case SYS_lwp_create: | |
3794 | #endif | |
3795 | #ifdef SYS_lwpcreate | |
3796 | case SYS_lwpcreate: | |
3797 | #endif | |
3798 | #if defined(SYS_lwp_create) || defined(SYS_lwpcreate) | |
3799 | /* | |
3800 | * This syscall is somewhat like fork/exec. | |
3801 | * We will get the event twice: once for the parent LWP, | |
3802 | * and once for the child. We should already know about | |
3803 | * the parent LWP, but the child will be new to us. So, | |
3804 | * whenever we get this event, if it represents a new | |
3805 | * thread, simply add the thread to the list. | |
3806 | */ | |
3807 | ||
3808 | /* If not in procinfo list, add it. */ | |
3809 | temp = proc_get_current_thread (pi); | |
3810 | if (!find_procinfo (pi->pid, temp)) | |
3811 | create_procinfo (pi->pid, temp); | |
3812 | ||
3813 | temp = MERGEPID (pi->pid, temp); | |
3814 | /* If not in GDB's thread list, add it. */ | |
3815 | if (!in_thread_list (temp)) | |
3816 | { | |
3817 | printf_filtered ("[New %s]\n", target_pid_to_str (temp)); | |
3818 | add_thread (temp); | |
3819 | } | |
3820 | /* Return to WFI, but tell it to immediately resume. */ | |
3821 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3822 | return inferior_pid; | |
3823 | #endif /* _lwp_create */ | |
c906108c | 3824 | |
c3f6f71d JM |
3825 | #ifdef SYS_lwp_exit |
3826 | case SYS_lwp_exit: | |
3827 | #endif | |
3828 | #ifdef SYS_lwpexit | |
3829 | case SYS_lwpexit: | |
3830 | #endif | |
3831 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3832 | printf_filtered ("[%s exited]\n", | |
3833 | target_pid_to_str (retval)); | |
3834 | delete_thread (retval); | |
3835 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3836 | return retval; | |
3837 | #endif /* _lwp_exit */ | |
3838 | ||
3839 | #ifdef SYS_sproc | |
3840 | case SYS_sproc: | |
3841 | /* Nothing to do here for now. The old procfs | |
3842 | seemed to use this event to handle threads on | |
3843 | older (non-LWP) systems, where I'm assuming that | |
3844 | threads were actually separate processes. Irix, | |
3845 | maybe? Anyway, low priority for now. */ | |
3846 | #endif | |
3847 | #ifdef SYS_fork | |
3848 | case SYS_fork: | |
3849 | /* FIXME: do we need to handle this? Investigate. */ | |
3850 | #endif | |
3851 | #ifdef SYS_vfork | |
3852 | case SYS_vfork: | |
3853 | /* FIXME: see above. */ | |
3854 | #endif | |
3855 | default: | |
3856 | printf_filtered ("procfs: trapped on exit from "); | |
3857 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3858 | printf_filtered ("\n"); | |
3859 | #ifndef PIOCSSPCACT | |
3860 | { | |
3861 | long i, nsysargs, *sysargs; | |
3862 | ||
3863 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3864 | (sysargs = proc_sysargs (pi)) != NULL) | |
3865 | { | |
0fda6bd2 | 3866 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3867 | for (i = 0; i < nsysargs; i++) |
02d5252f | 3868 | printf_filtered ("#%ld: 0x%08lx\n", |
c3f6f71d JM |
3869 | i, sysargs[i]); |
3870 | } | |
3871 | } | |
3872 | #endif | |
3873 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3874 | return inferior_pid; | |
3875 | } | |
3876 | break; | |
3877 | case PR_REQUESTED: | |
3878 | #if 0 /* FIXME */ | |
3879 | wstat = (SIGSTOP << 8) | 0177; | |
3880 | break; | |
3881 | #else | |
3882 | if (retry < 5) | |
3883 | { | |
3884 | printf_filtered ("Retry #%d:\n", retry); | |
3885 | pi->status_valid = 0; | |
3886 | goto wait_again; | |
3887 | } | |
3888 | else | |
3889 | { | |
3890 | /* If not in procinfo list, add it. */ | |
3891 | temp = proc_get_current_thread (pi); | |
3892 | if (!find_procinfo (pi->pid, temp)) | |
3893 | create_procinfo (pi->pid, temp); | |
3894 | ||
3895 | /* If not in GDB's thread list, add it. */ | |
3896 | temp = MERGEPID (pi->pid, temp); | |
3897 | if (!in_thread_list (temp)) | |
3898 | { | |
0d06e24b | 3899 | printf_filtered ("[New %s]\n", |
c3f6f71d JM |
3900 | target_pid_to_str (temp)); |
3901 | add_thread (temp); | |
3902 | } | |
3903 | ||
3904 | status->kind = TARGET_WAITKIND_STOPPED; | |
3905 | status->value.sig = 0; | |
3906 | return retval; | |
3907 | } | |
3908 | #endif | |
3909 | case PR_JOBCONTROL: | |
3910 | wstat = (what << 8) | 0177; | |
3911 | break; | |
3912 | case PR_FAULTED: | |
3913 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
3914 | #ifdef FLTWATCH | |
3915 | case FLTWATCH: | |
3916 | wstat = (SIGTRAP << 8) | 0177; | |
3917 | break; | |
3918 | #endif | |
3919 | #ifdef FLTKWATCH | |
3920 | case FLTKWATCH: | |
3921 | wstat = (SIGTRAP << 8) | 0177; | |
3922 | break; | |
3923 | #endif | |
3924 | /* FIXME: use si_signo where possible. */ | |
3925 | case FLTPRIV: | |
3926 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
3927 | case FLTILL: | |
3928 | #endif | |
3929 | wstat = (SIGILL << 8) | 0177; | |
3930 | break; | |
3931 | case FLTBPT: | |
3932 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
3933 | case FLTTRACE: | |
3934 | #endif | |
3935 | wstat = (SIGTRAP << 8) | 0177; | |
3936 | break; | |
3937 | case FLTSTACK: | |
3938 | case FLTACCESS: | |
3939 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
3940 | case FLTBOUNDS: | |
3941 | #endif | |
3942 | wstat = (SIGSEGV << 8) | 0177; | |
3943 | break; | |
3944 | case FLTIOVF: | |
3945 | case FLTIZDIV: | |
3946 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
3947 | case FLTFPE: | |
3948 | #endif | |
3949 | wstat = (SIGFPE << 8) | 0177; | |
3950 | break; | |
3951 | case FLTPAGE: /* Recoverable page fault */ | |
3952 | default: /* FIXME: use si_signo if possible for fault */ | |
3953 | retval = -1; | |
3954 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3955 | printf_filtered ("child stopped for unknown reason:\n"); | |
3956 | proc_prettyprint_why (why, what, 1); | |
3957 | error ("... giving up..."); | |
3958 | break; | |
3959 | } | |
3960 | break; /* case PR_FAULTED: */ | |
3961 | default: /* switch (why) unmatched */ | |
3962 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3963 | printf_filtered ("child stopped for unknown reason:\n"); | |
3964 | proc_prettyprint_why (why, what, 1); | |
3965 | error ("... giving up..."); | |
3966 | break; | |
3967 | } | |
3968 | /* | |
3969 | * Got this far without error: | |
3970 | * If retval isn't in the threads database, add it. | |
3971 | */ | |
3972 | if (retval > 0 && | |
3973 | retval != inferior_pid && | |
3974 | !in_thread_list (retval)) | |
c906108c | 3975 | { |
c3f6f71d JM |
3976 | /* |
3977 | * We have a new thread. | |
3978 | * We need to add it both to GDB's list and to our own. | |
3979 | * If we don't create a procinfo, resume may be unhappy | |
3980 | * later. | |
3981 | */ | |
3982 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
3983 | add_thread (retval); | |
3984 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
3985 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
3986 | ||
3987 | /* In addition, it's possible that this is the first | |
3988 | * new thread we've seen, in which case we may not | |
3989 | * have created entries for inferior_pid yet. | |
3990 | */ | |
3991 | if (TIDGET (inferior_pid) != 0) | |
3992 | { | |
3993 | if (!in_thread_list (inferior_pid)) | |
3994 | add_thread (inferior_pid); | |
3995 | if (find_procinfo (PIDGET (inferior_pid), | |
3996 | TIDGET (inferior_pid)) == NULL) | |
3997 | create_procinfo (PIDGET (inferior_pid), | |
3998 | TIDGET (inferior_pid)); | |
3999 | } | |
c906108c | 4000 | } |
c906108c | 4001 | } |
c3f6f71d | 4002 | else /* flags do not indicate STOPPED */ |
c906108c | 4003 | { |
c3f6f71d JM |
4004 | /* surely this can't happen... */ |
4005 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4006 | __LINE__); | |
4007 | proc_prettyprint_flags (flags, 1); | |
4008 | error ("procfs: ...giving up..."); | |
c906108c | 4009 | } |
c906108c | 4010 | } |
c906108c | 4011 | |
c3f6f71d JM |
4012 | if (status) |
4013 | store_waitstatus (status, wstat); | |
c906108c SS |
4014 | } |
4015 | ||
c3f6f71d JM |
4016 | return retval; |
4017 | } | |
c906108c | 4018 | |
c3f6f71d JM |
4019 | static int |
4020 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) | |
4021 | CORE_ADDR memaddr; | |
4022 | char *myaddr; | |
4023 | int len; | |
4024 | int dowrite; | |
4025 | struct target_ops *target; /* ignored */ | |
4026 | { | |
4027 | procinfo *pi; | |
4028 | int nbytes = 0; | |
c906108c | 4029 | |
c3f6f71d JM |
4030 | /* Find procinfo for main process */ |
4031 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4032 | if (pi->as_fd == 0 && | |
4033 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4034 | { |
c3f6f71d JM |
4035 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4036 | return 0; | |
c906108c | 4037 | } |
c906108c | 4038 | |
c3f6f71d | 4039 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4040 | { |
c3f6f71d | 4041 | if (dowrite) |
c906108c | 4042 | { |
c3f6f71d JM |
4043 | #ifdef NEW_PROC_API |
4044 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4045 | #else |
c3f6f71d | 4046 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4047 | #endif |
c3f6f71d | 4048 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4049 | } |
c3f6f71d | 4050 | else |
c906108c | 4051 | { |
c3f6f71d JM |
4052 | PROCFS_NOTE ("read memory: \n"); |
4053 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4054 | } |
c3f6f71d | 4055 | if (nbytes < 0) |
c906108c | 4056 | { |
c3f6f71d | 4057 | nbytes = 0; |
c906108c | 4058 | } |
c906108c | 4059 | } |
c3f6f71d | 4060 | return nbytes; |
c906108c SS |
4061 | } |
4062 | ||
4063 | /* | |
c3f6f71d JM |
4064 | * Function: invalidate_cache |
4065 | * | |
4066 | * Called by target_resume before making child runnable. | |
4067 | * Mark cached registers and status's invalid. | |
4068 | * If there are "dirty" caches that need to be written back | |
4069 | * to the child process, do that. | |
4070 | * | |
4071 | * File descriptors are also cached. | |
4072 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4073 | * However, as they are expensive to open, we don't want to throw them | |
4074 | * away indescriminately either. As a compromise, we will keep the | |
4075 | * file descriptors for the parent process, but discard any file | |
4076 | * descriptors we may have accumulated for the threads. | |
4077 | * | |
4078 | * Return value: | |
4079 | * As this function is called by iterate_over_threads, it always | |
4080 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
4081 | */ |
4082 | ||
c3f6f71d JM |
4083 | |
4084 | static int | |
4085 | invalidate_cache (parent, pi, ptr) | |
4086 | procinfo *parent; | |
4087 | procinfo *pi; | |
4088 | void *ptr; | |
c906108c | 4089 | { |
c3f6f71d JM |
4090 | /* |
4091 | * About to run the child; invalidate caches and do any other cleanup. | |
4092 | */ | |
c906108c | 4093 | |
c3f6f71d JM |
4094 | #if 0 |
4095 | if (pi->gregs_dirty) | |
4096 | if (parent == NULL || | |
4097 | proc_get_current_thread (parent) != pi->tid) | |
4098 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4099 | proc_warn (pi, "target_resume, set_gregs", | |
4100 | __LINE__); | |
60054393 MS |
4101 | if (FP0_REGNUM >= 0) |
4102 | if (pi->fpregs_dirty) | |
4103 | if (parent == NULL || | |
4104 | proc_get_current_thread (parent) != pi->tid) | |
4105 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4106 | proc_warn (pi, "target_resume, set_fpregs", | |
4107 | __LINE__); | |
c906108c | 4108 | #endif |
c906108c | 4109 | |
c3f6f71d | 4110 | if (parent != NULL) |
c906108c | 4111 | { |
c3f6f71d JM |
4112 | /* The presence of a parent indicates that this is an LWP. |
4113 | Close any file descriptors that it might have open. | |
4114 | We don't do this to the master (parent) procinfo. */ | |
4115 | ||
4116 | close_procinfo_files (pi); | |
c906108c | 4117 | } |
c3f6f71d JM |
4118 | pi->gregs_valid = 0; |
4119 | pi->fpregs_valid = 0; | |
4120 | #if 0 | |
4121 | pi->gregs_dirty = 0; | |
4122 | pi->fpregs_dirty = 0; | |
c906108c | 4123 | #endif |
c3f6f71d JM |
4124 | pi->status_valid = 0; |
4125 | pi->threads_valid = 0; | |
c906108c | 4126 | |
c3f6f71d | 4127 | return 0; |
c906108c SS |
4128 | } |
4129 | ||
0fda6bd2 | 4130 | #if 0 |
c906108c | 4131 | /* |
c3f6f71d JM |
4132 | * Function: make_signal_thread_runnable |
4133 | * | |
4134 | * A callback function for iterate_over_threads. | |
4135 | * Find the asynchronous signal thread, and make it runnable. | |
4136 | * See if that helps matters any. | |
c906108c SS |
4137 | */ |
4138 | ||
c3f6f71d JM |
4139 | static int |
4140 | make_signal_thread_runnable (process, pi, ptr) | |
4141 | procinfo *process; | |
4142 | procinfo *pi; | |
4143 | void *ptr; | |
c906108c | 4144 | { |
c3f6f71d JM |
4145 | #ifdef PR_ASLWP |
4146 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4147 | { |
c3f6f71d JM |
4148 | if (!proc_run_process (pi, 0, -1)) |
4149 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4150 | return 1; | |
c906108c | 4151 | } |
c906108c | 4152 | #endif |
c3f6f71d | 4153 | return 0; |
c906108c | 4154 | } |
0fda6bd2 | 4155 | #endif |
c906108c SS |
4156 | |
4157 | /* | |
c3f6f71d JM |
4158 | * Function: target_resume |
4159 | * | |
4160 | * Make the child process runnable. Normally we will then call | |
4161 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4162 | * | |
4163 | * Arguments: | |
4164 | * step: if true, then arrange for the child to stop again | |
4165 | * after executing a single instruction. | |
4166 | * signo: if zero, then cancel any pending signal. | |
4167 | * If non-zero, then arrange for the indicated signal | |
4168 | * to be delivered to the child when it runs. | |
4169 | * pid: if -1, then allow any child thread to run. | |
4170 | * if non-zero, then allow only the indicated thread to run. | |
4171 | ******* (not implemented yet) | |
c906108c SS |
4172 | */ |
4173 | ||
4174 | static void | |
c3f6f71d JM |
4175 | procfs_resume (pid, step, signo) |
4176 | int pid; | |
4177 | int step; | |
4178 | enum target_signal signo; | |
c906108c | 4179 | { |
c3f6f71d JM |
4180 | procinfo *pi, *thread; |
4181 | int native_signo; | |
4182 | ||
4183 | /* 2.1: | |
4184 | prrun.prflags |= PRSVADDR; | |
4185 | prrun.pr_vaddr = $PC; set resume address | |
4186 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4187 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4188 | prrun.prflags |= PRCFAULT; clear current fault. | |
4189 | ||
4190 | PRSTRACE and PRSFAULT can be done by other means | |
4191 | (proc_trace_signals, proc_trace_faults) | |
4192 | PRSVADDR is unnecessary. | |
4193 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4194 | This basically leaves PRSTEP and PRCSIG. | |
4195 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4196 | So basically PR_STEP is the sole argument that must be passed | |
4197 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4198 | ||
4199 | /* Find procinfo for main process */ | |
4200 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4201 | ||
4202 | /* First cut: ignore pid argument */ | |
4203 | errno = 0; | |
c906108c | 4204 | |
c3f6f71d JM |
4205 | /* Convert signal to host numbering. */ |
4206 | if (signo == 0 || | |
0fda6bd2 | 4207 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4208 | native_signo = 0; |
4209 | else | |
4210 | native_signo = target_signal_to_host (signo); | |
c906108c | 4211 | |
c3f6f71d | 4212 | pi->ignore_next_sigstop = 0; |
c906108c | 4213 | |
c3f6f71d JM |
4214 | /* Running the process voids all cached registers and status. */ |
4215 | /* Void the threads' caches first */ | |
4216 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4217 | /* Void the process procinfo's caches. */ | |
4218 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4219 | |
c3f6f71d | 4220 | if (pid != -1) |
c906108c | 4221 | { |
c3f6f71d JM |
4222 | /* Resume a specific thread, presumably suppressing the others. */ |
4223 | thread = find_procinfo (PIDGET (pid), TIDGET (pid)); | |
4224 | if (thread == NULL) | |
4225 | warning ("procfs: resume can't find thread %d -- resuming all.", | |
4226 | TIDGET (pid)); | |
4227 | else | |
c906108c | 4228 | { |
c3f6f71d JM |
4229 | if (thread->tid != 0) |
4230 | { | |
4231 | /* We're to resume a specific thread, and not the others. | |
4232 | * Set the child process's PR_ASYNC flag. | |
4233 | */ | |
4234 | #ifdef PR_ASYNC | |
4235 | if (!proc_set_async (pi)) | |
4236 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4237 | #endif | |
4238 | #if 0 | |
4239 | proc_iterate_over_threads (pi, | |
4240 | make_signal_thread_runnable, | |
4241 | NULL); | |
4242 | #endif | |
4243 | pi = thread; /* substitute the thread's procinfo for run */ | |
4244 | } | |
c906108c SS |
4245 | } |
4246 | } | |
c906108c | 4247 | |
c3f6f71d | 4248 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4249 | { |
c3f6f71d JM |
4250 | if (errno == EBUSY) |
4251 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4252 | else | |
4253 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4254 | } |
c3f6f71d | 4255 | } |
c906108c | 4256 | |
c3f6f71d JM |
4257 | /* |
4258 | * Function: register_gdb_signals | |
4259 | * | |
4260 | * Traverse the list of signals that GDB knows about | |
4261 | * (see "handle" command), and arrange for the target | |
4262 | * to be stopped or not, according to these settings. | |
4263 | * | |
4264 | * Returns non-zero for success, zero for failure. | |
4265 | */ | |
c906108c | 4266 | |
c3f6f71d JM |
4267 | static int |
4268 | register_gdb_signals (pi, signals) | |
4269 | procinfo *pi; | |
4270 | sigset_t *signals; | |
4271 | { | |
4272 | int signo; | |
c906108c | 4273 | |
c3f6f71d JM |
4274 | for (signo = 0; signo < NSIG; signo ++) |
4275 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4276 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4277 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4278 | prdelset (signals, signo); | |
4279 | else | |
4280 | praddset (signals, signo); | |
c906108c | 4281 | |
c3f6f71d | 4282 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4283 | } |
4284 | ||
4285 | /* | |
c3f6f71d JM |
4286 | * Function: target_notice_signals |
4287 | * | |
4288 | * Set up to trace signals in the child process. | |
4289 | */ | |
c906108c | 4290 | |
c3f6f71d JM |
4291 | static void |
4292 | procfs_notice_signals (pid) | |
4293 | int pid; | |
4294 | { | |
4295 | sigset_t signals; | |
4296 | procinfo *pi = find_procinfo_or_die (PIDGET (pid), 0); | |
c906108c | 4297 | |
c3f6f71d JM |
4298 | if (proc_get_traced_signals (pi, &signals) && |
4299 | register_gdb_signals (pi, &signals)) | |
4300 | return; | |
4301 | else | |
4302 | proc_error (pi, "notice_signals", __LINE__); | |
4303 | } | |
c906108c | 4304 | |
c3f6f71d JM |
4305 | /* |
4306 | * Function: target_files_info | |
4307 | * | |
4308 | * Print status information about the child process. | |
4309 | */ | |
c906108c | 4310 | |
c3f6f71d JM |
4311 | static void |
4312 | procfs_files_info (ignore) | |
4313 | struct target_ops *ignore; | |
4314 | { | |
4315 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4316 | attach_flag? "attached": "child", | |
4317 | target_pid_to_str (inferior_pid)); | |
4318 | } | |
c906108c | 4319 | |
c3f6f71d JM |
4320 | /* |
4321 | * Function: target_open | |
4322 | * | |
4323 | * A dummy: you don't open procfs. | |
c906108c SS |
4324 | */ |
4325 | ||
4326 | static void | |
c3f6f71d JM |
4327 | procfs_open (args, from_tty) |
4328 | char *args; | |
4329 | int from_tty; | |
c906108c | 4330 | { |
c3f6f71d JM |
4331 | error ("Use the \"run\" command to start a Unix child process."); |
4332 | } | |
c906108c | 4333 | |
c3f6f71d JM |
4334 | /* |
4335 | * Function: target_can_run | |
4336 | * | |
4337 | * This tells GDB that this target vector can be invoked | |
4338 | * for "run" or "attach". | |
4339 | */ | |
c906108c | 4340 | |
c3f6f71d JM |
4341 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4342 | be a runnable target. Used by targets | |
4343 | that can sit atop procfs, such as solaris | |
4344 | thread support. */ | |
c906108c | 4345 | |
c906108c | 4346 | |
c3f6f71d JM |
4347 | static int |
4348 | procfs_can_run () | |
4349 | { | |
4350 | /* This variable is controlled by modules that sit atop procfs that | |
4351 | may layer their own process structure atop that provided here. | |
4352 | sol-thread.c does this because of the Solaris two-level thread | |
4353 | model. */ | |
4354 | ||
4355 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4356 | |
c3f6f71d JM |
4357 | return !procfs_suppress_run; |
4358 | } | |
c906108c | 4359 | |
c3f6f71d JM |
4360 | /* |
4361 | * Function: target_stop | |
4362 | * | |
4363 | * Stop the child process asynchronously, as when the | |
4364 | * gdb user types control-c or presses a "stop" button. | |
4365 | * | |
4366 | * Works by sending kill(SIGINT) to the child's process group. | |
4367 | */ | |
c906108c | 4368 | |
c3f6f71d JM |
4369 | static void |
4370 | procfs_stop () | |
4371 | { | |
4372 | extern pid_t inferior_process_group; | |
c906108c | 4373 | |
c3f6f71d | 4374 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4375 | } |
4376 | ||
c906108c | 4377 | /* |
c3f6f71d JM |
4378 | * Function: unconditionally_kill_inferior |
4379 | * | |
4380 | * Make it die. Wait for it to die. Clean up after it. | |
4381 | * Note: this should only be applied to the real process, | |
4382 | * not to an LWP, because of the check for parent-process. | |
4383 | * If we need this to work for an LWP, it needs some more logic. | |
4384 | */ | |
c906108c | 4385 | |
c3f6f71d JM |
4386 | static void |
4387 | unconditionally_kill_inferior (pi) | |
4388 | procinfo *pi; | |
4389 | { | |
4390 | int parent_pid; | |
c906108c | 4391 | |
c3f6f71d JM |
4392 | parent_pid = proc_parent_pid (pi); |
4393 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4394 | /* FIXME: use access functions */ | |
4395 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4396 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4397 | file for the inferior. */ | |
4398 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4399 | { | |
4400 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4401 | } | |
4402 | #endif | |
4403 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4404 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4405 | to kill the inferior, otherwise it might remain stopped with a | |
4406 | pending SIGKILL. | |
4407 | We do not check the result of the PIOCSSIG, the inferior might have | |
4408 | died already. */ | |
4409 | { | |
4410 | struct siginfo newsiginfo; | |
c906108c | 4411 | |
c3f6f71d JM |
4412 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4413 | newsiginfo.si_signo = SIGKILL; | |
4414 | newsiginfo.si_code = 0; | |
4415 | newsiginfo.si_errno = 0; | |
4416 | newsiginfo.si_pid = getpid (); | |
4417 | newsiginfo.si_uid = getuid (); | |
4418 | /* FIXME: use proc_set_current_signal */ | |
4419 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4420 | } | |
4421 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4422 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4423 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4424 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4425 | destroy_procinfo (pi); | |
c906108c | 4426 | |
c3f6f71d JM |
4427 | /* If pi is GDB's child, wait for it to die. */ |
4428 | if (parent_pid == getpid ()) | |
4429 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4430 | Should we check the returned event? */ | |
4431 | { | |
0d06e24b | 4432 | #if 0 |
c3f6f71d | 4433 | int status, ret; |
c906108c | 4434 | |
c3f6f71d JM |
4435 | ret = waitpid (pi->pid, &status, 0); |
4436 | #else | |
4437 | wait (NULL); | |
4438 | #endif | |
4439 | } | |
4440 | } | |
c906108c | 4441 | |
c3f6f71d JM |
4442 | /* |
4443 | * Function: target_kill_inferior | |
4444 | * | |
4445 | * We're done debugging it, and we want it to go away. | |
4446 | * Then we want GDB to forget all about it. | |
c906108c SS |
4447 | */ |
4448 | ||
c3f6f71d JM |
4449 | static void |
4450 | procfs_kill_inferior () | |
c906108c | 4451 | { |
c3f6f71d JM |
4452 | if (inferior_pid != 0) /* ? */ |
4453 | { | |
4454 | /* Find procinfo for main process */ | |
4455 | procinfo *pi = find_procinfo (PIDGET (inferior_pid), 0); | |
c906108c | 4456 | |
c3f6f71d JM |
4457 | if (pi) |
4458 | unconditionally_kill_inferior (pi); | |
4459 | target_mourn_inferior (); | |
c906108c | 4460 | } |
c3f6f71d JM |
4461 | } |
4462 | ||
4463 | /* | |
4464 | * Function: target_mourn_inferior | |
4465 | * | |
4466 | * Forget we ever debugged this thing! | |
4467 | */ | |
c906108c | 4468 | |
c3f6f71d JM |
4469 | static void |
4470 | procfs_mourn_inferior () | |
4471 | { | |
4472 | procinfo *pi; | |
c906108c | 4473 | |
c3f6f71d JM |
4474 | if (inferior_pid != 0) |
4475 | { | |
4476 | /* Find procinfo for main process */ | |
4477 | pi = find_procinfo (PIDGET (inferior_pid), 0); | |
4478 | if (pi) | |
4479 | destroy_procinfo (pi); | |
c906108c | 4480 | } |
c3f6f71d JM |
4481 | unpush_target (&procfs_ops); |
4482 | generic_mourn_inferior (); | |
4483 | } | |
c906108c | 4484 | |
c3f6f71d JM |
4485 | /* |
4486 | * Function: init_inferior | |
4487 | * | |
4488 | * When GDB forks to create a runnable inferior process, | |
4489 | * this function is called on the parent side of the fork. | |
4490 | * It's job is to do whatever is necessary to make the child | |
4491 | * ready to be debugged, and then wait for the child to synchronize. | |
4492 | */ | |
c906108c | 4493 | |
c3f6f71d JM |
4494 | static void |
4495 | procfs_init_inferior (pid) | |
4496 | int pid; | |
4497 | { | |
4498 | procinfo *pi; | |
4499 | sigset_t signals; | |
4500 | int fail; | |
c906108c | 4501 | |
c3f6f71d JM |
4502 | /* This routine called on the parent side (GDB side) |
4503 | after GDB forks the inferior. */ | |
c906108c | 4504 | |
c3f6f71d | 4505 | push_target (&procfs_ops); |
c906108c | 4506 | |
c3f6f71d JM |
4507 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4508 | perror ("procfs: out of memory in 'init_inferior'"); | |
4509 | ||
4510 | if (!open_procinfo_files (pi, FD_CTL)) | |
4511 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4512 | ||
4513 | /* | |
4514 | xmalloc // done | |
4515 | open_procinfo_files // done | |
4516 | link list // done | |
4517 | prfillset (trace) | |
4518 | procfs_notice_signals | |
4519 | prfillset (fault) | |
4520 | prdelset (FLTPAGE) | |
4521 | PIOCWSTOP | |
4522 | PIOCSFAULT | |
4523 | */ | |
4524 | ||
4525 | /* If not stopped yet, wait for it to stop. */ | |
4526 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4527 | !(proc_wait_for_stop (pi))) | |
4528 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4529 | ||
4530 | /* Save some of the /proc state to be restored if we detach. */ | |
4531 | /* FIXME: Why? In case another debugger was debugging it? | |
4532 | We're it's parent, for Ghu's sake! */ | |
4533 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4534 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4535 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4536 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4537 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4538 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
4539 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
4540 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); | |
4541 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
4542 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); | |
4543 | ||
4544 | /* Register to trace selected signals in the child. */ | |
4545 | prfillset (&signals); | |
4546 | if (!register_gdb_signals (pi, &signals)) | |
4547 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4548 | ||
4549 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4550 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4551 | ||
0d06e24b JM |
4552 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4553 | and possibly even turning ON kill-on-last-close at this point. But | |
4554 | I can't make that change without careful testing which I don't have | |
4555 | time to do right now... */ | |
c3f6f71d JM |
4556 | /* Turn on run-on-last-close flag so that the child |
4557 | will die if GDB goes away for some reason. */ | |
4558 | if (!proc_set_run_on_last_close (pi)) | |
4559 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4560 | ||
4561 | /* The 'process ID' we return to GDB is composed of | |
4562 | the actual process ID plus the lwp ID. */ | |
4563 | inferior_pid = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c | 4564 | |
c3f6f71d JM |
4565 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4566 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4567 | #else | |
4568 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4569 | startup_inferior (2); | |
0d06e24b | 4570 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4571 | } |
c906108c | 4572 | |
c3f6f71d JM |
4573 | /* |
4574 | * Function: set_exec_trap | |
4575 | * | |
4576 | * When GDB forks to create a new process, this function is called | |
4577 | * on the child side of the fork before GDB exec's the user program. | |
4578 | * Its job is to make the child minimally debuggable, so that the | |
4579 | * parent GDB process can connect to the child and take over. | |
4580 | * This function should do only the minimum to make that possible, | |
4581 | * and to synchronize with the parent process. The parent process | |
4582 | * should take care of the details. | |
4583 | */ | |
4584 | ||
4585 | static void | |
4586 | procfs_set_exec_trap () | |
4587 | { | |
4588 | /* This routine called on the child side (inferior side) | |
4589 | after GDB forks the inferior. It must use only local variables, | |
4590 | because it may be sharing data space with its parent. */ | |
c906108c | 4591 | |
c3f6f71d JM |
4592 | procinfo *pi; |
4593 | sysset_t exitset; | |
c906108c | 4594 | |
c3f6f71d JM |
4595 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4596 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4597 | |
c3f6f71d JM |
4598 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4599 | { | |
4600 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4601 | gdb_flush (gdb_stderr); | |
4602 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4603 | _exit (127); | |
4604 | } | |
c906108c | 4605 | |
c3f6f71d JM |
4606 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4607 | /* OSF method for tracing exec syscalls. Quoting: | |
4608 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4609 | exits from exec system calls because of the user level loader. */ | |
4610 | /* FIXME: make nice and maybe move into an access function. */ | |
4611 | { | |
4612 | int prfs_flags; | |
c906108c | 4613 | |
c3f6f71d JM |
4614 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4615 | { | |
4616 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4617 | gdb_flush (gdb_stderr); | |
4618 | _exit (127); | |
4619 | } | |
4620 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4621 | |
c3f6f71d JM |
4622 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4623 | { | |
4624 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4625 | gdb_flush (gdb_stderr); | |
4626 | _exit (127); | |
4627 | } | |
4628 | } | |
4629 | #else /* not PRFS_STOPEXEC */ | |
4630 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4631 | /* GW: Rationale... | |
4632 | Not all systems with /proc have all the exec* syscalls with the same | |
4633 | names. On the SGI, for example, there is no SYS_exec, but there | |
4634 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4635 | |
c3f6f71d JM |
4636 | premptyset (&exitset); |
4637 | #ifdef SYS_exec | |
4638 | praddset (&exitset, SYS_exec); | |
4639 | #endif | |
4640 | #ifdef SYS_execve | |
4641 | praddset (&exitset, SYS_execve); | |
4642 | #endif | |
4643 | #ifdef SYS_execv | |
4644 | praddset (&exitset, SYS_execv); | |
c906108c | 4645 | #endif |
c906108c | 4646 | |
c3f6f71d | 4647 | if (!proc_set_traced_sysexit (pi, &exitset)) |
c906108c | 4648 | { |
c3f6f71d JM |
4649 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4650 | gdb_flush (gdb_stderr); | |
4651 | _exit (127); | |
c906108c | 4652 | } |
c3f6f71d JM |
4653 | #endif /* PRFS_STOPEXEC */ |
4654 | ||
4655 | /* FIXME: should this be done in the parent instead? */ | |
4656 | /* Turn off inherit on fork flag so that all grand-children | |
4657 | of gdb start with tracing flags cleared. */ | |
4658 | if (!proc_unset_inherit_on_fork (pi)) | |
4659 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4660 | ||
4661 | /* Turn off run on last close flag, so that the child process | |
4662 | cannot run away just because we close our handle on it. | |
4663 | We want it to wait for the parent to attach. */ | |
4664 | if (!proc_unset_run_on_last_close (pi)) | |
4665 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4666 | ||
4667 | /* FIXME: No need to destroy the procinfo -- | |
4668 | we have our own address space, and we're about to do an exec! */ | |
4669 | /*destroy_procinfo (pi);*/ | |
c906108c | 4670 | } |
c906108c | 4671 | |
c3f6f71d JM |
4672 | /* |
4673 | * Function: create_inferior | |
4674 | * | |
4675 | * This function is called BEFORE gdb forks the inferior process. | |
4676 | * Its only real responsibility is to set things up for the fork, | |
4677 | * and tell GDB which two functions to call after the fork (one | |
4678 | * for the parent, and one for the child). | |
4679 | * | |
4680 | * This function does a complicated search for a unix shell program, | |
4681 | * which it then uses to parse arguments and environment variables | |
4682 | * to be sent to the child. I wonder whether this code could not | |
4683 | * be abstracted out and shared with other unix targets such as | |
4684 | * infptrace? | |
4685 | */ | |
c906108c SS |
4686 | |
4687 | static void | |
4688 | procfs_create_inferior (exec_file, allargs, env) | |
4689 | char *exec_file; | |
4690 | char *allargs; | |
4691 | char **env; | |
4692 | { | |
4693 | char *shell_file = getenv ("SHELL"); | |
4694 | char *tryname; | |
4695 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4696 | { | |
4697 | ||
4698 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4699 | just do this the normal way (via execlp, which operates by |
4700 | attempting an exec for each element of the PATH until it | |
4701 | finds one which succeeds), then there will be an exec for | |
4702 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4703 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4704 | for these failed execs with the ones for successful execs | |
4705 | (whether the exec has succeeded is stored at that time in the | |
4706 | carry bit or some such architecture-specific and | |
4707 | non-ABI-specified place). | |
4708 | ||
4709 | So I can't think of anything better than to search the PATH | |
4710 | now. This has several disadvantages: (1) There is a race | |
4711 | condition; if we find a file now and it is deleted before we | |
4712 | exec it, we lose, even if the deletion leaves a valid file | |
4713 | further down in the PATH, (2) there is no way to know exactly | |
4714 | what an executable (in the sense of "capable of being | |
4715 | exec'd") file is. Using access() loses because it may lose | |
4716 | if the caller is the superuser; failing to use it loses if | |
4717 | there are ACLs or some such. */ | |
c906108c SS |
4718 | |
4719 | char *p; | |
4720 | char *p1; | |
4721 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4722 | path is used from within GDB. */ |
c906108c SS |
4723 | char *path = getenv ("PATH"); |
4724 | int len; | |
4725 | struct stat statbuf; | |
4726 | ||
4727 | if (path == NULL) | |
4728 | path = "/bin:/usr/bin"; | |
4729 | ||
4730 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4731 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4732 | { |
4733 | p1 = strchr (p, ':'); | |
4734 | if (p1 != NULL) | |
4735 | len = p1 - p; | |
4736 | else | |
4737 | len = strlen (p); | |
4738 | strncpy (tryname, p, len); | |
4739 | tryname[len] = '\0'; | |
4740 | strcat (tryname, "/"); | |
4741 | strcat (tryname, shell_file); | |
4742 | if (access (tryname, X_OK) < 0) | |
4743 | continue; | |
4744 | if (stat (tryname, &statbuf) < 0) | |
4745 | continue; | |
4746 | if (!S_ISREG (statbuf.st_mode)) | |
4747 | /* We certainly need to reject directories. I'm not quite | |
4748 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4749 | that people want to exec() these things. */ | |
4750 | continue; | |
4751 | break; | |
4752 | } | |
4753 | if (p == NULL) | |
4754 | /* Not found. This must be an error rather than merely passing | |
4755 | the file to execlp(), because execlp() would try all the | |
4756 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
4757 | error ("procfs:%d -- Can't find shell %s in PATH", |
4758 | __LINE__, shell_file); | |
c906108c SS |
4759 | |
4760 | shell_file = tryname; | |
4761 | } | |
4762 | ||
c3f6f71d JM |
4763 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4764 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
4765 | |
4766 | /* We are at the first instruction we care about. */ | |
4767 | /* Pedal to the metal... */ | |
4768 | ||
2acceee2 | 4769 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
4770 | } |
4771 | ||
c3f6f71d JM |
4772 | /* |
4773 | * Function: notice_thread | |
4774 | * | |
4775 | * Callback for find_new_threads. | |
4776 | * Calls "add_thread". | |
4777 | */ | |
c906108c | 4778 | |
c3f6f71d JM |
4779 | static int |
4780 | procfs_notice_thread (pi, thread, ptr) | |
4781 | procinfo *pi; | |
4782 | procinfo *thread; | |
4783 | void *ptr; | |
c906108c | 4784 | { |
c3f6f71d | 4785 | int gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4786 | |
c3f6f71d JM |
4787 | if (!in_thread_list (gdb_threadid)) |
4788 | add_thread (gdb_threadid); | |
c906108c | 4789 | |
c3f6f71d JM |
4790 | return 0; |
4791 | } | |
4792 | ||
4793 | /* | |
4794 | * Function: target_find_new_threads | |
4795 | * | |
4796 | * Query all the threads that the target knows about, | |
4797 | * and give them back to GDB to add to its list. | |
4798 | */ | |
4799 | ||
4800 | void | |
4801 | procfs_find_new_threads () | |
4802 | { | |
4803 | procinfo *pi; | |
4804 | ||
4805 | /* Find procinfo for main process */ | |
4806 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4807 | proc_update_threads (pi); | |
4808 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4809 | } |
4810 | ||
c3f6f71d JM |
4811 | /* |
4812 | * Function: target_thread_alive | |
4813 | * | |
4814 | * Return true if the thread is still 'alive'. | |
4815 | * | |
4816 | * This guy doesn't really seem to be doing his job. | |
4817 | * Got to investigate how to tell when a thread is really gone. | |
4818 | */ | |
c906108c | 4819 | |
c906108c | 4820 | static int |
c3f6f71d JM |
4821 | procfs_thread_alive (pid) |
4822 | int pid; | |
c906108c | 4823 | { |
c3f6f71d JM |
4824 | int proc, thread; |
4825 | procinfo *pi; | |
c906108c | 4826 | |
c3f6f71d JM |
4827 | proc = PIDGET (pid); |
4828 | thread = TIDGET (pid); | |
4829 | /* If I don't know it, it ain't alive! */ | |
4830 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
4831 | return 0; | |
4832 | ||
4833 | /* If I can't get its status, it ain't alive! | |
4834 | What's more, I need to forget about it! */ | |
4835 | if (!proc_get_status (pi)) | |
4836 | { | |
4837 | destroy_procinfo (pi); | |
4838 | return 0; | |
4839 | } | |
4840 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
4841 | return 1; | |
c906108c | 4842 | } |
c3f6f71d JM |
4843 | |
4844 | /* | |
4845 | * Function: target_pid_to_str | |
4846 | * | |
4847 | * Return a string to be used to identify the thread in | |
4848 | * the "info threads" display. | |
4849 | */ | |
4850 | ||
4851 | char * | |
4852 | procfs_pid_to_str (pid) | |
c5aa993b | 4853 | int pid; |
c3f6f71d JM |
4854 | { |
4855 | static char buf[80]; | |
4856 | int proc, thread; | |
4857 | procinfo *pi; | |
4858 | ||
4859 | proc = PIDGET (pid); | |
4860 | thread = TIDGET (pid); | |
4861 | pi = find_procinfo (proc, thread); | |
4862 | ||
4863 | if (thread == 0) | |
4864 | sprintf (buf, "Process %d", proc); | |
4865 | else | |
4866 | sprintf (buf, "LWP %d", thread); | |
4867 | return &buf[0]; | |
4868 | } | |
4869 | ||
4870 | /* | |
4871 | * Function: procfs_set_watchpoint | |
4872 | * Insert a watchpoint | |
4873 | */ | |
4874 | ||
4875 | int | |
4876 | procfs_set_watchpoint (pid, addr, len, rwflag, after) | |
4877 | int pid; | |
c5aa993b | 4878 | CORE_ADDR addr; |
c3f6f71d JM |
4879 | int len; |
4880 | int rwflag; | |
4881 | int after; | |
c906108c | 4882 | { |
c3f6f71d JM |
4883 | #ifndef UNIXWARE |
4884 | int pflags = 0; | |
4885 | procinfo *pi; | |
4886 | ||
4887 | pi = find_procinfo_or_die (pid == -1 ? | |
4888 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4889 | ||
4890 | /* Translate from GDB's flags to /proc's */ | |
4891 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 4892 | { |
c3f6f71d JM |
4893 | switch (rwflag) { /* FIXME: need an enum! */ |
4894 | case hw_write: /* default watchpoint (write) */ | |
4895 | pflags = WRITE_WATCHFLAG; | |
4896 | break; | |
4897 | case hw_read: /* read watchpoint */ | |
4898 | pflags = READ_WATCHFLAG; | |
4899 | break; | |
4900 | case hw_access: /* access watchpoint */ | |
4901 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4902 | break; | |
4903 | case hw_execute: /* execution HW breakpoint */ | |
4904 | pflags = EXEC_WATCHFLAG; | |
4905 | break; | |
4906 | default: /* Something weird. Return error. */ | |
c906108c | 4907 | return -1; |
c3f6f71d JM |
4908 | } |
4909 | if (after) /* Stop after r/w access is completed. */ | |
4910 | pflags |= AFTER_WATCHFLAG; | |
4911 | } | |
4912 | ||
4913 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4914 | { | |
4915 | if (errno == E2BIG) /* Typical error for no resources */ | |
4916 | return -1; /* fail */ | |
4917 | /* GDB may try to remove the same watchpoint twice. | |
4918 | If a remove request returns no match, don't error. */ | |
c906108c | 4919 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4920 | return 0; /* ignore */ |
4921 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4922 | } |
c3f6f71d | 4923 | #endif |
c906108c SS |
4924 | return 0; |
4925 | } | |
4926 | ||
c3f6f71d JM |
4927 | /* |
4928 | * Function: stopped_by_watchpoint | |
4929 | * | |
4930 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
4931 | * else returns zero. | |
4932 | */ | |
4933 | ||
c906108c | 4934 | int |
c5aa993b | 4935 | procfs_stopped_by_watchpoint (pid) |
c3f6f71d | 4936 | int pid; |
c906108c | 4937 | { |
c3f6f71d | 4938 | procinfo *pi; |
c906108c | 4939 | |
c3f6f71d JM |
4940 | pi = find_procinfo_or_die (pid == -1 ? |
4941 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4942 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 4943 | { |
c3f6f71d JM |
4944 | if (proc_why (pi) == PR_FAULTED) |
4945 | { | |
c906108c | 4946 | #ifdef FLTWATCH |
c3f6f71d JM |
4947 | if (proc_what (pi) == FLTWATCH) |
4948 | return 1; | |
c906108c SS |
4949 | #endif |
4950 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4951 | if (proc_what (pi) == FLTKWATCH) |
4952 | return 1; | |
c906108c | 4953 | #endif |
c3f6f71d | 4954 | } |
c906108c SS |
4955 | } |
4956 | return 0; | |
4957 | } | |
c906108c | 4958 | |
c3f6f71d JM |
4959 | #ifdef TM_I386SOL2_H |
4960 | /* | |
4961 | * Function: procfs_find_LDT_entry | |
4962 | * | |
4963 | * Input: | |
4964 | * int pid; // The GDB-style pid-plus-LWP. | |
4965 | * | |
4966 | * Return: | |
4967 | * pointer to the corresponding LDT entry. | |
4968 | */ | |
c906108c | 4969 | |
c3f6f71d JM |
4970 | struct ssd * |
4971 | procfs_find_LDT_entry (pid) | |
c906108c SS |
4972 | int pid; |
4973 | { | |
c3f6f71d JM |
4974 | gdb_gregset_t *gregs; |
4975 | int key; | |
4976 | procinfo *pi; | |
c906108c | 4977 | |
c3f6f71d JM |
4978 | /* Find procinfo for the lwp. */ |
4979 | if ((pi = find_procinfo (PIDGET (pid), TIDGET (pid))) == NULL) | |
c906108c | 4980 | { |
c3f6f71d JM |
4981 | warning ("procfs_find_LDT_entry: could not find procinfi for %d.", |
4982 | pid); | |
4983 | return NULL; | |
c906108c | 4984 | } |
c3f6f71d JM |
4985 | /* get its general registers. */ |
4986 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
4987 | { | |
4988 | warning ("procfs_find_LDT_entry: could not read gregs for %d.", | |
4989 | pid); | |
4990 | return NULL; | |
4991 | } | |
4992 | /* Now extract the GS register's lower 16 bits. */ | |
4993 | key = (*gregs)[GS] & 0xffff; | |
4994 | ||
4995 | /* Find the matching entry and return it. */ | |
4996 | return proc_get_LDT_entry (pi, key); | |
c906108c | 4997 | } |
c3f6f71d | 4998 | #endif /* TM_I386SOL2_H */ |
c906108c | 4999 | |
c3f6f71d JM |
5000 | |
5001 | ||
5002 | static void | |
5003 | info_proc_cmd (args, from_tty) | |
5004 | char *args; | |
5005 | int from_tty; | |
c906108c | 5006 | { |
c3f6f71d JM |
5007 | struct cleanup *old_chain; |
5008 | procinfo *process = NULL; | |
5009 | procinfo *thread = NULL; | |
5010 | char **argv = NULL; | |
5011 | char *tmp = NULL; | |
5012 | int pid = 0; | |
5013 | int tid = 0; | |
c906108c | 5014 | |
c3f6f71d JM |
5015 | old_chain = make_cleanup (null_cleanup, 0); |
5016 | if (args) | |
0fda6bd2 JM |
5017 | { |
5018 | if ((argv = buildargv (args)) == NULL) | |
5019 | nomem (0); | |
5020 | else | |
004527cb | 5021 | make_cleanup_freeargv (argv); |
0fda6bd2 | 5022 | } |
c3f6f71d JM |
5023 | while (argv != NULL && *argv != NULL) |
5024 | { | |
5025 | if (isdigit (argv[0][0])) | |
5026 | { | |
5027 | pid = strtoul (argv[0], &tmp, 10); | |
5028 | if (*tmp == '/') | |
5029 | tid = strtoul (++tmp, NULL, 10); | |
5030 | } | |
5031 | else if (argv[0][0] == '/') | |
5032 | { | |
5033 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5034 | } | |
5035 | else | |
5036 | { | |
5037 | /* [...] */ | |
5038 | } | |
5039 | argv++; | |
5040 | } | |
5041 | if (pid == 0) | |
5042 | pid = PIDGET (inferior_pid); | |
5043 | if (pid == 0) | |
5044 | error ("No current process: you must name one."); | |
5045 | else | |
c906108c | 5046 | { |
c3f6f71d JM |
5047 | /* Have pid, will travel. |
5048 | First see if it's a process we're already debugging. */ | |
5049 | process = find_procinfo (pid, 0); | |
5050 | if (process == NULL) | |
5051 | { | |
5052 | /* No. So open a procinfo for it, but | |
5053 | remember to close it again when finished. */ | |
5054 | process = create_procinfo (pid, 0); | |
004527cb | 5055 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5056 | if (!open_procinfo_files (process, FD_CTL)) |
5057 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5058 | } | |
c906108c | 5059 | } |
c3f6f71d JM |
5060 | if (tid != 0) |
5061 | thread = create_procinfo (pid, tid); | |
5062 | ||
5063 | if (process) | |
5064 | { | |
5065 | printf_filtered ("process %d flags:\n", process->pid); | |
5066 | proc_prettyprint_flags (proc_flags (process), 1); | |
5067 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5068 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5069 | if (proc_get_nthreads (process) > 1) | |
5070 | printf_filtered ("Process has %d threads.\n", | |
5071 | proc_get_nthreads (process)); | |
5072 | } | |
5073 | if (thread) | |
5074 | { | |
5075 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5076 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5077 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5078 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5079 | } | |
5080 | ||
5081 | do_cleanups (old_chain); | |
c906108c SS |
5082 | } |
5083 | ||
c3f6f71d JM |
5084 | static void |
5085 | proc_trace_syscalls (args, from_tty, entry_or_exit, mode) | |
5086 | char *args; | |
5087 | int from_tty; | |
5088 | int entry_or_exit; | |
5089 | int mode; | |
c906108c | 5090 | { |
c3f6f71d JM |
5091 | procinfo *pi; |
5092 | sysset_t *sysset; | |
5093 | int syscallnum = 0; | |
c906108c | 5094 | |
c3f6f71d JM |
5095 | if (inferior_pid <= 0) |
5096 | error ("you must be debugging a process to use this command."); | |
c906108c | 5097 | |
c3f6f71d JM |
5098 | if (args == NULL || args[0] == 0) |
5099 | error_no_arg ("system call to trace"); | |
5100 | ||
5101 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
5102 | if (isdigit (args[0])) | |
5103 | { | |
5104 | syscallnum = atoi (args); | |
5105 | if (entry_or_exit == PR_SYSENTRY) | |
5106 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5107 | else | |
5108 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5109 | |
c3f6f71d JM |
5110 | if (sysset == NULL) |
5111 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5112 | |
c3f6f71d JM |
5113 | if (mode == FLAG_SET) |
5114 | praddset (sysset, syscallnum); | |
5115 | else | |
5116 | prdelset (sysset, syscallnum); | |
c906108c | 5117 | |
c3f6f71d JM |
5118 | if (entry_or_exit == PR_SYSENTRY) |
5119 | { | |
5120 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5121 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5122 | } | |
5123 | else | |
5124 | { | |
5125 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5126 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5127 | } | |
5128 | } | |
5129 | } | |
5130 | ||
5131 | static void | |
5132 | proc_trace_sysentry_cmd (args, from_tty) | |
5133 | char *args; | |
5134 | int from_tty; | |
c906108c | 5135 | { |
c3f6f71d JM |
5136 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5137 | } | |
c906108c | 5138 | |
c3f6f71d JM |
5139 | static void |
5140 | proc_trace_sysexit_cmd (args, from_tty) | |
5141 | char *args; | |
5142 | int from_tty; | |
5143 | { | |
5144 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5145 | } |
c906108c | 5146 | |
c3f6f71d JM |
5147 | static void |
5148 | proc_untrace_sysentry_cmd (args, from_tty) | |
5149 | char *args; | |
5150 | int from_tty; | |
5151 | { | |
5152 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5153 | } | |
5154 | ||
5155 | static void | |
5156 | proc_untrace_sysexit_cmd (args, from_tty) | |
5157 | char *args; | |
5158 | int from_tty; | |
c906108c | 5159 | { |
c3f6f71d JM |
5160 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5161 | } | |
c906108c | 5162 | |
c906108c | 5163 | |
c906108c SS |
5164 | void |
5165 | _initialize_procfs () | |
5166 | { | |
c906108c SS |
5167 | init_procfs_ops (); |
5168 | add_target (&procfs_ops); | |
c3f6f71d JM |
5169 | add_info ("proc", info_proc_cmd, |
5170 | "Show /proc process information about any running process.\ | |
5171 | Default is the process being debugged."); | |
5172 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, | |
5173 | "Give a trace of entries into the syscall."); | |
5174 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5175 | "Give a trace of exits from the syscall."); | |
5176 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5177 | "Cancel a trace of entries into the syscall."); | |
5178 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5179 | "Cancel a trace of exits from the syscall."); | |
c3f6f71d JM |
5180 | } |
5181 | ||
5182 | /* =================== END, GDB "MODULE" =================== */ | |
5183 | ||
5184 | ||
5185 | ||
5186 | /* miscelaneous stubs: */ | |
5187 | /* The following satisfy a few random symbols mostly created by */ | |
5188 | /* the solaris threads implementation, which I will chase down */ | |
5189 | /* later. */ | |
5190 | ||
5191 | /* | |
5192 | * Return a pid for which we guarantee | |
5193 | * we will be able to find a 'live' procinfo. | |
5194 | */ | |
5195 | ||
5196 | int | |
5197 | procfs_first_available () | |
5198 | { | |
5199 | if (procinfo_list) | |
5200 | return procinfo_list->pid; | |
5201 | else | |
5202 | return -1; | |
5203 | } |