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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 | |
8ab86381 | 101 | static void procfs_open (char *, int); |
a14ed312 KB |
102 | static void procfs_attach (char *, int); |
103 | static void procfs_detach (char *, int); | |
104 | static void procfs_resume (int, int, enum target_signal); | |
105 | static int procfs_can_run (void); | |
106 | static void procfs_stop (void); | |
107 | static void procfs_files_info (struct target_ops *); | |
108 | static void procfs_fetch_registers (int); | |
109 | static void procfs_store_registers (int); | |
110 | static void procfs_notice_signals (int); | |
111 | static void procfs_prepare_to_store (void); | |
112 | static void procfs_kill_inferior (void); | |
113 | static void procfs_mourn_inferior (void); | |
114 | static void procfs_create_inferior (char *, char *, char **); | |
115 | static int procfs_wait (int, struct target_waitstatus *); | |
116 | static int procfs_xfer_memory (CORE_ADDR, | |
117 | char *, int, int, struct target_ops *); | |
118 | ||
119 | static int procfs_thread_alive (int); | |
120 | ||
121 | void procfs_find_new_threads (void); | |
122 | char *procfs_pid_to_str (int); | |
c3f6f71d JM |
123 | |
124 | struct target_ops procfs_ops; /* the target vector */ | |
c906108c | 125 | |
c3f6f71d JM |
126 | static void |
127 | init_procfs_ops () | |
128 | { | |
129 | procfs_ops.to_shortname = "procfs"; | |
130 | procfs_ops.to_longname = "Unix /proc child process"; | |
131 | procfs_ops.to_doc = | |
132 | "Unix /proc child process (started by the \"run\" command)."; | |
133 | procfs_ops.to_open = procfs_open; | |
134 | procfs_ops.to_can_run = procfs_can_run; | |
135 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
136 | procfs_ops.to_kill = procfs_kill_inferior; | |
137 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
138 | procfs_ops.to_attach = procfs_attach; | |
139 | procfs_ops.to_detach = procfs_detach; | |
140 | procfs_ops.to_wait = procfs_wait; | |
141 | procfs_ops.to_resume = procfs_resume; | |
142 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
143 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
144 | procfs_ops.to_store_registers = procfs_store_registers; | |
145 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
146 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
147 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
148 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
149 | procfs_ops.to_files_info = procfs_files_info; | |
150 | procfs_ops.to_stop = procfs_stop; | |
151 | ||
152 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
153 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
154 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
155 | procfs_ops.to_terminal_ours = terminal_ours; | |
156 | procfs_ops.to_terminal_info = child_terminal_info; | |
157 | ||
158 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
159 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
160 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
161 | ||
103b3ef5 MS |
162 | procfs_ops.to_has_all_memory = 1; |
163 | procfs_ops.to_has_memory = 1; | |
c3f6f71d JM |
164 | procfs_ops.to_has_execution = 1; |
165 | procfs_ops.to_has_stack = 1; | |
166 | procfs_ops.to_has_registers = 1; | |
167 | procfs_ops.to_stratum = process_stratum; | |
168 | procfs_ops.to_has_thread_control = tc_schedlock; | |
169 | procfs_ops.to_magic = OPS_MAGIC; | |
170 | } | |
c906108c | 171 | |
c3f6f71d JM |
172 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
173 | ||
c3f6f71d JM |
174 | /* |
175 | * World Unification: | |
176 | * | |
177 | * Put any typedefs, defines etc. here that are required for | |
178 | * the unification of code that handles different versions of /proc. | |
179 | */ | |
180 | ||
181 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
182 | #ifndef UNIXWARE | |
183 | enum { READ_WATCHFLAG = WA_READ, | |
184 | WRITE_WATCHFLAG = WA_WRITE, | |
185 | EXEC_WATCHFLAG = WA_EXEC, | |
186 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
187 | }; | |
188 | #endif | |
189 | #else /* Irix method for watchpoints */ | |
190 | enum { READ_WATCHFLAG = MA_READ, | |
191 | WRITE_WATCHFLAG = MA_WRITE, | |
192 | EXEC_WATCHFLAG = MA_EXEC, | |
193 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
194 | }; | |
195 | #endif | |
196 | ||
197 | ||
198 | ||
199 | ||
200 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
201 | ||
202 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
203 | ||
204 | /* The procinfo struct is a wrapper to hold all the state information | |
205 | concerning a /proc process. There should be exactly one procinfo | |
206 | for each process, and since GDB currently can debug only one | |
207 | process at a time, that means there should be only one procinfo. | |
208 | All of the LWP's of a process can be accessed indirectly thru the | |
209 | single process procinfo. | |
210 | ||
211 | However, against the day when GDB may debug more than one process, | |
212 | this data structure is kept in a list (which for now will hold no | |
213 | more than one member), and many functions will have a pointer to a | |
214 | procinfo as an argument. | |
215 | ||
216 | There will be a separate procinfo structure for use by the (not yet | |
217 | implemented) "info proc" command, so that we can print useful | |
218 | information about any random process without interfering with the | |
219 | inferior's procinfo information. */ | |
220 | ||
221 | #ifdef NEW_PROC_API | |
222 | /* format strings for /proc paths */ | |
223 | # ifndef CTL_PROC_NAME_FMT | |
224 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
225 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
226 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
227 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
228 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
229 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
230 | # endif | |
231 | /* the name of the proc status struct depends on the implementation */ | |
232 | typedef pstatus_t gdb_prstatus_t; | |
233 | typedef lwpstatus_t gdb_lwpstatus_t; | |
234 | #else /* ! NEW_PROC_API */ | |
235 | /* format strings for /proc paths */ | |
236 | # ifndef CTL_PROC_NAME_FMT | |
237 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
238 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
239 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
240 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
241 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
242 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
243 | # endif | |
c906108c | 244 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 245 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
246 | typedef prstatus_t gdb_lwpstatus_t; |
247 | #endif /* NEW_PROC_API */ | |
c906108c | 248 | |
0d06e24b JM |
249 | /* Provide default composite pid manipulation macros for systems that |
250 | don't have threads. */ | |
c906108c | 251 | |
c3f6f71d | 252 | #ifndef PIDGET |
0d06e24b JM |
253 | #define PIDGET(PID) (PID) |
254 | #define TIDGET(PID) (PID) | |
eeefac92 AC |
255 | #endif |
256 | #ifndef MERGEPID | |
0d06e24b | 257 | #define MERGEPID(PID, TID) (PID) |
c906108c SS |
258 | #endif |
259 | ||
c3f6f71d JM |
260 | typedef struct procinfo { |
261 | struct procinfo *next; | |
262 | int pid; /* Process ID */ | |
263 | int tid; /* Thread/LWP id */ | |
c906108c | 264 | |
c3f6f71d JM |
265 | /* process state */ |
266 | int was_stopped; | |
267 | int ignore_next_sigstop; | |
c906108c | 268 | |
c3f6f71d JM |
269 | /* The following four fd fields may be identical, or may contain |
270 | several different fd's, depending on the version of /proc | |
271 | (old ioctl or new read/write). */ | |
c906108c | 272 | |
c3f6f71d JM |
273 | int ctl_fd; /* File descriptor for /proc control file */ |
274 | /* | |
275 | * The next three file descriptors are actually only needed in the | |
276 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
277 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
278 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
279 | * implementation) filling them with copies of the control fd. | |
280 | */ | |
281 | int status_fd; /* File descriptor for /proc status file */ | |
282 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 283 | |
c3f6f71d | 284 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 285 | |
c3f6f71d JM |
286 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
287 | sigset_t saved_sigset; /* Saved traced signal set */ | |
288 | sigset_t saved_sighold; /* Saved held signal set */ | |
289 | sysset_t saved_exitset; /* Saved traced system call exit set */ | |
290 | sysset_t saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 291 | |
c3f6f71d | 292 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 293 | |
c3f6f71d JM |
294 | #ifndef NEW_PROC_API |
295 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 296 | #endif |
c3f6f71d JM |
297 | |
298 | struct procinfo *thread_list; | |
c906108c | 299 | |
c3f6f71d JM |
300 | int status_valid : 1; |
301 | int gregs_valid : 1; | |
302 | int fpregs_valid : 1; | |
303 | int threads_valid: 1; | |
304 | } procinfo; | |
c906108c | 305 | |
c3f6f71d | 306 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 307 | |
c3f6f71d | 308 | /* Function prototypes for procinfo module: */ |
c906108c | 309 | |
a14ed312 KB |
310 | static procinfo *find_procinfo_or_die (int pid, int tid); |
311 | static procinfo *find_procinfo (int pid, int tid); | |
312 | static procinfo *create_procinfo (int pid, int tid); | |
313 | static void destroy_procinfo (procinfo * p); | |
004527cb | 314 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
315 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
316 | static int open_procinfo_files (procinfo * p, int which); | |
317 | static void close_procinfo_files (procinfo * p); | |
c906108c | 318 | |
c3f6f71d JM |
319 | /* The head of the procinfo list: */ |
320 | static procinfo * procinfo_list; | |
c906108c | 321 | |
c3f6f71d JM |
322 | /* |
323 | * Function: find_procinfo | |
324 | * | |
325 | * Search the procinfo list. | |
326 | * | |
327 | * Returns: pointer to procinfo, or NULL if not found. | |
328 | */ | |
c906108c | 329 | |
c3f6f71d JM |
330 | static procinfo * |
331 | find_procinfo (pid, tid) | |
332 | int pid; | |
333 | int tid; | |
c5aa993b | 334 | { |
c3f6f71d | 335 | procinfo *pi; |
c906108c | 336 | |
c3f6f71d JM |
337 | for (pi = procinfo_list; pi; pi = pi->next) |
338 | if (pi->pid == pid) | |
339 | break; | |
c906108c | 340 | |
c3f6f71d JM |
341 | if (pi) |
342 | if (tid) | |
343 | { | |
344 | /* Don't check threads_valid. If we're updating the | |
345 | thread_list, we want to find whatever threads are already | |
346 | here. This means that in general it is the caller's | |
347 | responsibility to check threads_valid and update before | |
348 | calling find_procinfo, if the caller wants to find a new | |
349 | thread. */ | |
350 | ||
351 | for (pi = pi->thread_list; pi; pi = pi->next) | |
352 | if (pi->tid == tid) | |
353 | break; | |
354 | } | |
c906108c | 355 | |
c3f6f71d JM |
356 | return pi; |
357 | } | |
c906108c | 358 | |
c3f6f71d JM |
359 | /* |
360 | * Function: find_procinfo_or_die | |
361 | * | |
362 | * Calls find_procinfo, but errors on failure. | |
363 | */ | |
c906108c | 364 | |
c3f6f71d JM |
365 | static procinfo * |
366 | find_procinfo_or_die (pid, tid) | |
367 | int pid; | |
368 | int tid; | |
369 | { | |
370 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 371 | |
c3f6f71d | 372 | if (pi == NULL) |
0fda6bd2 JM |
373 | { |
374 | if (tid) | |
375 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
376 | pid, tid); | |
377 | else | |
378 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
379 | } | |
c3f6f71d JM |
380 | return pi; |
381 | } | |
c906108c | 382 | |
c3f6f71d JM |
383 | /* |
384 | * Function: open_procinfo_files | |
385 | * | |
386 | * Open the file descriptor for the process or LWP. | |
387 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
388 | * the others are opened lazily as needed. | |
389 | * else (if not NEW_PROC_API), there is only one real | |
390 | * file descriptor, but we keep multiple copies of it so that | |
391 | * the code that uses them does not have to be #ifdef'd. | |
392 | * | |
393 | * Return: file descriptor, or zero for failure. | |
394 | */ | |
c906108c | 395 | |
c3f6f71d | 396 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 397 | |
c3f6f71d JM |
398 | static int |
399 | open_procinfo_files (pi, which) | |
400 | procinfo *pi; | |
401 | int which; | |
402 | { | |
0fda6bd2 | 403 | #ifdef NEW_PROC_API |
c3f6f71d | 404 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 405 | #endif |
c3f6f71d JM |
406 | int fd; |
407 | ||
408 | /* | |
409 | * This function is getting ALMOST long enough to break up into several. | |
410 | * Here is some rationale: | |
411 | * | |
412 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
413 | * There are several file descriptors that may need to be open | |
414 | * for any given process or LWP. The ones we're intereted in are: | |
415 | * - control (ctl) write-only change the state | |
416 | * - status (status) read-only query the state | |
417 | * - address space (as) read/write access memory | |
418 | * - map (map) read-only virtual addr map | |
419 | * Most of these are opened lazily as they are needed. | |
420 | * The pathnames for the 'files' for an LWP look slightly | |
421 | * different from those of a first-class process: | |
422 | * Pathnames for a process (<proc-id>): | |
423 | * /proc/<proc-id>/ctl | |
424 | * /proc/<proc-id>/status | |
425 | * /proc/<proc-id>/as | |
426 | * /proc/<proc-id>/map | |
427 | * Pathnames for an LWP (lwp-id): | |
428 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
429 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
430 | * An LWP has no map or address space file descriptor, since | |
431 | * the memory map and address space are shared by all LWPs. | |
432 | * | |
433 | * Everyone else (Solaris 2.5, Irix, OSF) | |
434 | * There is only one file descriptor for each process or LWP. | |
435 | * For convenience, we copy the same file descriptor into all | |
436 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
437 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
438 | * doesn't need any #ifdef's. | |
439 | * Pathname for all: | |
440 | * /proc/<proc-id> | |
441 | * | |
442 | * Solaris 2.5 LWP's: | |
443 | * Each LWP has an independent file descriptor, but these | |
444 | * are not obtained via the 'open' system call like the rest: | |
445 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
446 | * to the file descriptor of the parent process. | |
447 | * | |
448 | * OSF threads: | |
449 | * These do not even have their own independent file descriptor. | |
450 | * All operations are carried out on the file descriptor of the | |
451 | * parent process. Therefore we just call open again for each | |
452 | * thread, getting a new handle for the same 'file'. | |
453 | */ | |
454 | ||
455 | #ifdef NEW_PROC_API | |
456 | /* | |
457 | * In this case, there are several different file descriptors that | |
458 | * we might be asked to open. The control file descriptor will be | |
459 | * opened early, but the others will be opened lazily as they are | |
460 | * needed. | |
461 | */ | |
462 | ||
463 | strcpy (tmp, pi->pathname); | |
464 | switch (which) { /* which file descriptor to open? */ | |
465 | case FD_CTL: | |
466 | if (pi->tid) | |
467 | strcat (tmp, "/lwpctl"); | |
468 | else | |
469 | strcat (tmp, "/ctl"); | |
470 | fd = open (tmp, O_WRONLY); | |
471 | if (fd <= 0) | |
472 | return 0; /* fail */ | |
473 | pi->ctl_fd = fd; | |
474 | break; | |
475 | case FD_AS: | |
476 | if (pi->tid) | |
477 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
478 | strcat (tmp, "/as"); | |
479 | fd = open (tmp, O_RDWR); | |
480 | if (fd <= 0) | |
481 | return 0; /* fail */ | |
482 | pi->as_fd = fd; | |
483 | break; | |
484 | case FD_STATUS: | |
485 | if (pi->tid) | |
486 | strcat (tmp, "/lwpstatus"); | |
487 | else | |
488 | strcat (tmp, "/status"); | |
489 | fd = open (tmp, O_RDONLY); | |
490 | if (fd <= 0) | |
491 | return 0; /* fail */ | |
492 | pi->status_fd = fd; | |
493 | break; | |
494 | default: | |
495 | return 0; /* unknown file descriptor */ | |
496 | } | |
497 | #else /* not NEW_PROC_API */ | |
498 | /* | |
499 | * In this case, there is only one file descriptor for each procinfo | |
500 | * (ie. each process or LWP). In fact, only the file descriptor for | |
501 | * the process can actually be opened by an 'open' system call. | |
502 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
503 | * on the process's file descriptor. | |
504 | * | |
505 | * For convenience, we copy each procinfo's single file descriptor | |
506 | * into all of the fields occupied by the several file descriptors | |
507 | * of the NEW_PROC_API implementation. That way, the code that uses | |
508 | * them can be written without ifdefs. | |
509 | */ | |
510 | ||
511 | ||
512 | #ifdef PIOCTSTATUS /* OSF */ | |
513 | if ((fd = open (pi->pathname, O_RDWR)) == 0) /* Only one FD; just open it. */ | |
514 | return 0; | |
515 | #else /* Sol 2.5, Irix, other? */ | |
516 | if (pi->tid == 0) /* Master procinfo for the process */ | |
517 | { | |
518 | fd = open (pi->pathname, O_RDWR); | |
519 | if (fd <= 0) | |
520 | return 0; /* fail */ | |
521 | } | |
522 | else /* LWP thread procinfo */ | |
523 | { | |
524 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
525 | procinfo *process; | |
526 | int lwpid = pi->tid; | |
527 | ||
528 | /* Find the procinfo for the entire process. */ | |
529 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
530 | return 0; /* fail */ | |
531 | ||
532 | /* Now obtain the file descriptor for the LWP. */ | |
533 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
534 | return 0; /* fail */ | |
535 | #else /* Irix, other? */ | |
536 | return 0; /* Don't know how to open threads */ | |
537 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
538 | } | |
539 | #endif /* OSF PIOCTSTATUS */ | |
540 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
541 | #endif /* NEW_PROC_API */ | |
c906108c | 542 | |
c3f6f71d JM |
543 | return 1; /* success */ |
544 | } | |
c906108c | 545 | |
c3f6f71d JM |
546 | /* |
547 | * Function: create_procinfo | |
548 | * | |
549 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 550 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
551 | * |
552 | * Return: pointer to new procinfo struct. | |
553 | */ | |
c906108c | 554 | |
c3f6f71d JM |
555 | static procinfo * |
556 | create_procinfo (pid, tid) | |
557 | int pid; | |
558 | int tid; | |
559 | { | |
560 | procinfo *pi, *parent; | |
c906108c | 561 | |
0d06e24b | 562 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 563 | return pi; /* Already exists, nothing to do. */ |
c906108c | 564 | |
c3f6f71d JM |
565 | /* find parent before doing malloc, to save having to cleanup */ |
566 | if (tid != 0) | |
567 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
568 | create it if it | |
569 | doesn't exist yet? */ | |
c906108c | 570 | |
c3f6f71d JM |
571 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
572 | memset (pi, 0, sizeof (procinfo)); | |
573 | pi->pid = pid; | |
574 | pi->tid = tid; | |
c906108c | 575 | |
c3f6f71d JM |
576 | /* Chain into list. */ |
577 | if (tid == 0) | |
578 | { | |
579 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
580 | pi->next = procinfo_list; | |
581 | procinfo_list = pi; | |
582 | } | |
583 | else | |
584 | { | |
585 | #ifdef NEW_PROC_API | |
586 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
587 | #else | |
588 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
589 | #endif | |
590 | pi->next = parent->thread_list; | |
591 | parent->thread_list = pi; | |
592 | } | |
593 | return pi; | |
594 | } | |
c906108c | 595 | |
c3f6f71d JM |
596 | /* |
597 | * Function: close_procinfo_files | |
598 | * | |
599 | * Close all file descriptors associated with the procinfo | |
600 | */ | |
c906108c | 601 | |
c3f6f71d JM |
602 | static void |
603 | close_procinfo_files (pi) | |
604 | procinfo *pi; | |
605 | { | |
606 | if (pi->ctl_fd > 0) | |
607 | close (pi->ctl_fd); | |
608 | #ifdef NEW_PROC_API | |
609 | if (pi->as_fd > 0) | |
610 | close (pi->as_fd); | |
611 | if (pi->status_fd > 0) | |
612 | close (pi->status_fd); | |
613 | #endif | |
614 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
615 | } | |
c906108c | 616 | |
c3f6f71d JM |
617 | /* |
618 | * Function: destroy_procinfo | |
619 | * | |
620 | * Destructor function. Close, unlink and deallocate the object. | |
621 | */ | |
c906108c | 622 | |
c3f6f71d JM |
623 | static void |
624 | destroy_one_procinfo (list, pi) | |
625 | procinfo **list; | |
626 | procinfo *pi; | |
627 | { | |
628 | procinfo *ptr; | |
629 | ||
630 | /* Step one: unlink the procinfo from its list */ | |
631 | if (pi == *list) | |
632 | *list = pi->next; | |
633 | else | |
634 | for (ptr = *list; ptr; ptr = ptr->next) | |
635 | if (ptr->next == pi) | |
636 | { | |
637 | ptr->next = pi->next; | |
638 | break; | |
639 | } | |
7a292a7a | 640 | |
c3f6f71d JM |
641 | /* Step two: close any open file descriptors */ |
642 | close_procinfo_files (pi); | |
7a292a7a | 643 | |
c3f6f71d JM |
644 | /* Step three: free the memory. */ |
645 | free (pi); | |
646 | } | |
c906108c | 647 | |
c3f6f71d JM |
648 | static void |
649 | destroy_procinfo (pi) | |
650 | procinfo *pi; | |
651 | { | |
652 | procinfo *tmp; | |
c906108c | 653 | |
c3f6f71d JM |
654 | if (pi->tid != 0) /* destroy a thread procinfo */ |
655 | { | |
656 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
657 | destroy_one_procinfo (&tmp->thread_list, pi); | |
658 | } | |
659 | else /* destroy a process procinfo and all its threads */ | |
660 | { | |
661 | /* First destroy the children, if any; */ | |
662 | while (pi->thread_list != NULL) | |
663 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
664 | /* Then destroy the parent. Genocide!!! */ | |
665 | destroy_one_procinfo (&procinfo_list, pi); | |
666 | } | |
667 | } | |
c906108c | 668 | |
004527cb AC |
669 | static void |
670 | do_destroy_procinfo_cleanup (void *pi) | |
671 | { | |
672 | destroy_procinfo (pi); | |
673 | } | |
674 | ||
c3f6f71d | 675 | enum { NOKILL, KILL }; |
c906108c | 676 | |
c3f6f71d JM |
677 | /* |
678 | * Function: dead_procinfo | |
679 | * | |
680 | * To be called on a non_recoverable error for a procinfo. | |
681 | * Prints error messages, optionally sends a SIGKILL to the process, | |
682 | * then destroys the data structure. | |
683 | */ | |
c906108c | 684 | |
c3f6f71d JM |
685 | static void |
686 | dead_procinfo (pi, msg, kill_p) | |
687 | procinfo *pi; | |
688 | char *msg; | |
689 | int kill_p; | |
690 | { | |
691 | char procfile[80]; | |
c906108c | 692 | |
c3f6f71d JM |
693 | if (pi->pathname) |
694 | { | |
695 | print_sys_errmsg (pi->pathname, errno); | |
696 | } | |
697 | else | |
698 | { | |
699 | sprintf (procfile, "process %d", pi->pid); | |
700 | print_sys_errmsg (procfile, errno); | |
701 | } | |
702 | if (kill_p == KILL) | |
703 | kill (pi->pid, SIGKILL); | |
c906108c | 704 | |
c3f6f71d JM |
705 | destroy_procinfo (pi); |
706 | error (msg); | |
707 | } | |
c906108c | 708 | |
c3f6f71d | 709 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 710 | |
c3f6f71d | 711 | /* =================== /proc "MODULE" =================== */ |
c906108c | 712 | |
c3f6f71d JM |
713 | /* |
714 | * This "module" is the interface layer between the /proc system API | |
715 | * and the gdb target vector functions. This layer consists of | |
716 | * access functions that encapsulate each of the basic operations | |
717 | * that we need to use from the /proc API. | |
718 | * | |
719 | * The main motivation for this layer is to hide the fact that | |
720 | * there are two very different implementations of the /proc API. | |
721 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
722 | * functions, we do our best to hide them all in here. | |
723 | */ | |
c906108c | 724 | |
a14ed312 KB |
725 | int proc_get_status (procinfo * pi); |
726 | long proc_flags (procinfo * pi); | |
727 | int proc_why (procinfo * pi); | |
728 | int proc_what (procinfo * pi); | |
729 | int proc_set_run_on_last_close (procinfo * pi); | |
730 | int proc_unset_run_on_last_close (procinfo * pi); | |
731 | int proc_set_inherit_on_fork (procinfo * pi); | |
732 | int proc_unset_inherit_on_fork (procinfo * pi); | |
733 | int proc_set_async (procinfo * pi); | |
734 | int proc_unset_async (procinfo * pi); | |
735 | int proc_stop_process (procinfo * pi); | |
736 | int proc_trace_signal (procinfo * pi, int signo); | |
737 | int proc_ignore_signal (procinfo * pi, int signo); | |
738 | int proc_clear_current_fault (procinfo * pi); | |
739 | int proc_set_current_signal (procinfo * pi, int signo); | |
740 | int proc_clear_current_signal (procinfo * pi); | |
741 | int proc_set_gregs (procinfo * pi); | |
742 | int proc_set_fpregs (procinfo * pi); | |
743 | int proc_wait_for_stop (procinfo * pi); | |
744 | int proc_run_process (procinfo * pi, int step, int signo); | |
745 | int proc_kill (procinfo * pi, int signo); | |
746 | int proc_parent_pid (procinfo * pi); | |
747 | int proc_get_nthreads (procinfo * pi); | |
748 | int proc_get_current_thread (procinfo * pi); | |
749 | int proc_set_held_signals (procinfo * pi, sigset_t * sighold); | |
750 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); | |
751 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
752 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
753 | int proc_set_traced_signals (procinfo * pi, sigset_t * sigset); | |
754 | ||
755 | int proc_update_threads (procinfo * pi); | |
756 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
757 | int (*func) (procinfo *, procinfo *, void *), |
758 | void *ptr); | |
a14ed312 KB |
759 | |
760 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
761 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
762 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
763 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
764 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
765 | sigset_t *proc_get_traced_signals (procinfo * pi, sigset_t * save); | |
766 | sigset_t *proc_get_held_signals (procinfo * pi, sigset_t * save); | |
767 | sigset_t *proc_get_pending_signals (procinfo * pi, sigset_t * save); | |
768 | struct sigaction *proc_get_signal_actions (procinfo * pi, | |
769 | struct sigaction *save); | |
770 | ||
771 | void proc_warn (procinfo * pi, char *func, int line); | |
772 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 773 | |
c3f6f71d JM |
774 | void |
775 | proc_warn (pi, func, line) | |
776 | procinfo *pi; | |
777 | char *func; | |
778 | int line; | |
779 | { | |
780 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
781 | print_sys_errmsg (errmsg, errno); | |
782 | } | |
c906108c | 783 | |
c3f6f71d JM |
784 | void |
785 | proc_error (pi, func, line) | |
786 | procinfo *pi; | |
787 | char *func; | |
788 | int line; | |
789 | { | |
790 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
791 | perror_with_name (errmsg); | |
792 | } | |
c906108c | 793 | |
c3f6f71d JM |
794 | /* |
795 | * Function: proc_get_status | |
796 | * | |
797 | * Updates the status struct in the procinfo. | |
798 | * There is a 'valid' flag, to let other functions know when | |
799 | * this function needs to be called (so the status is only | |
800 | * read when it is needed). The status file descriptor is | |
801 | * also only opened when it is needed. | |
802 | * | |
803 | * Return: non-zero for success, zero for failure. | |
804 | */ | |
c906108c | 805 | |
c3f6f71d JM |
806 | int |
807 | proc_get_status (pi) | |
808 | procinfo *pi; | |
809 | { | |
810 | /* Status file descriptor is opened "lazily" */ | |
811 | if (pi->status_fd == 0 && | |
812 | open_procinfo_files (pi, FD_STATUS) == 0) | |
813 | { | |
814 | pi->status_valid = 0; | |
815 | return 0; | |
816 | } | |
c906108c | 817 | |
c3f6f71d JM |
818 | #ifdef NEW_PROC_API |
819 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
820 | pi->status_valid = 0; /* fail */ | |
821 | else | |
822 | { | |
823 | /* Sigh... I have to read a different data structure, | |
824 | depending on whether this is a main process or an LWP. */ | |
825 | if (pi->tid) | |
826 | pi->status_valid = (read (pi->status_fd, | |
827 | (char *) &pi->prstatus.pr_lwp, | |
828 | sizeof (lwpstatus_t)) | |
829 | == sizeof (lwpstatus_t)); | |
830 | else | |
831 | { | |
832 | pi->status_valid = (read (pi->status_fd, | |
833 | (char *) &pi->prstatus, | |
834 | sizeof (gdb_prstatus_t)) | |
835 | == sizeof (gdb_prstatus_t)); | |
836 | #if 0 /*def UNIXWARE*/ | |
837 | if (pi->status_valid && | |
838 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
839 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
840 | /* Unixware peculiarity -- read the damn thing again! */ | |
841 | pi->status_valid = (read (pi->status_fd, | |
842 | (char *) &pi->prstatus, | |
843 | sizeof (gdb_prstatus_t)) | |
844 | == sizeof (gdb_prstatus_t)); | |
845 | #endif /* UNIXWARE */ | |
846 | } | |
847 | } | |
848 | #else /* ioctl method */ | |
849 | #ifdef PIOCTSTATUS /* osf */ | |
850 | if (pi->tid == 0) /* main process */ | |
851 | { | |
852 | /* Just read the danged status. Now isn't that simple? */ | |
853 | pi->status_valid = | |
854 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
855 | } | |
856 | else | |
857 | { | |
858 | int win; | |
859 | struct { | |
860 | long pr_count; | |
861 | tid_t pr_error_thread; | |
862 | struct prstatus status; | |
863 | } thread_status; | |
864 | ||
865 | thread_status.pr_count = 1; | |
866 | thread_status.status.pr_tid = pi->tid; | |
867 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
868 | if (win) | |
869 | { | |
870 | memcpy (&pi->prstatus, &thread_status.status, | |
871 | sizeof (pi->prstatus)); | |
872 | pi->status_valid = 1; | |
873 | } | |
874 | } | |
875 | #else | |
876 | /* Just read the danged status. Now isn't that simple? */ | |
877 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
878 | #endif | |
879 | #endif | |
c906108c | 880 | |
c3f6f71d JM |
881 | if (pi->status_valid) |
882 | { | |
883 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
884 | proc_why (pi), | |
885 | proc_what (pi), | |
886 | proc_get_current_thread (pi)); | |
887 | } | |
c906108c | 888 | |
c3f6f71d JM |
889 | /* The status struct includes general regs, so mark them valid too */ |
890 | pi->gregs_valid = pi->status_valid; | |
891 | #ifdef NEW_PROC_API | |
892 | /* In the read/write multiple-fd model, | |
893 | the status struct includes the fp regs too, so mark them valid too */ | |
894 | pi->fpregs_valid = pi->status_valid; | |
895 | #endif | |
896 | return pi->status_valid; /* True if success, false if failure. */ | |
897 | } | |
c906108c | 898 | |
c3f6f71d JM |
899 | /* |
900 | * Function: proc_flags | |
901 | * | |
902 | * returns the process flags (pr_flags field). | |
903 | */ | |
904 | ||
905 | long | |
906 | proc_flags (pi) | |
907 | procinfo *pi; | |
908 | { | |
909 | if (!pi->status_valid) | |
910 | if (!proc_get_status (pi)) | |
911 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 912 | |
c3f6f71d | 913 | #ifdef NEW_PROC_API |
0d06e24b JM |
914 | # ifdef UNIXWARE |
915 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
916 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
917 | The two sets of flags don't overlap. */ | |
918 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
919 | # else | |
c3f6f71d | 920 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 921 | # endif |
c3f6f71d JM |
922 | #else |
923 | return pi->prstatus.pr_flags; | |
924 | #endif | |
925 | } | |
c906108c | 926 | |
c3f6f71d JM |
927 | /* |
928 | * Function: proc_why | |
929 | * | |
930 | * returns the pr_why field (why the process stopped). | |
931 | */ | |
c906108c | 932 | |
c3f6f71d JM |
933 | int |
934 | proc_why (pi) | |
935 | procinfo *pi; | |
936 | { | |
937 | if (!pi->status_valid) | |
938 | if (!proc_get_status (pi)) | |
939 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 940 | |
c3f6f71d JM |
941 | #ifdef NEW_PROC_API |
942 | return pi->prstatus.pr_lwp.pr_why; | |
943 | #else | |
944 | return pi->prstatus.pr_why; | |
945 | #endif | |
946 | } | |
c906108c | 947 | |
c3f6f71d JM |
948 | /* |
949 | * Function: proc_what | |
950 | * | |
951 | * returns the pr_what field (details of why the process stopped). | |
952 | */ | |
c906108c | 953 | |
c3f6f71d JM |
954 | int |
955 | proc_what (pi) | |
956 | procinfo *pi; | |
957 | { | |
958 | if (!pi->status_valid) | |
959 | if (!proc_get_status (pi)) | |
960 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 961 | |
c3f6f71d JM |
962 | #ifdef NEW_PROC_API |
963 | return pi->prstatus.pr_lwp.pr_what; | |
964 | #else | |
965 | return pi->prstatus.pr_what; | |
c906108c | 966 | #endif |
c3f6f71d | 967 | } |
c906108c | 968 | |
c3f6f71d JM |
969 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
970 | /* | |
971 | * Function: proc_nsysarg | |
972 | * | |
973 | * returns the pr_nsysarg field (number of args to the current syscall). | |
974 | */ | |
975 | ||
976 | int | |
977 | proc_nsysarg (pi) | |
978 | procinfo *pi; | |
979 | { | |
980 | if (!pi->status_valid) | |
981 | if (!proc_get_status (pi)) | |
982 | return 0; | |
983 | ||
984 | #ifdef NEW_PROC_API | |
985 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
986 | #else | |
987 | return pi->prstatus.pr_nsysarg; | |
c906108c | 988 | #endif |
c3f6f71d | 989 | } |
c906108c | 990 | |
c3f6f71d JM |
991 | /* |
992 | * Function: proc_sysargs | |
993 | * | |
994 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
995 | */ | |
c906108c | 996 | |
c3f6f71d JM |
997 | long * |
998 | proc_sysargs (pi) | |
999 | procinfo *pi; | |
1000 | { | |
1001 | if (!pi->status_valid) | |
1002 | if (!proc_get_status (pi)) | |
1003 | return NULL; | |
1004 | ||
1005 | #ifdef NEW_PROC_API | |
1006 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1007 | #else | |
1008 | return (long *) &pi->prstatus.pr_sysarg; | |
1009 | #endif | |
1010 | } | |
c906108c | 1011 | |
c3f6f71d JM |
1012 | /* |
1013 | * Function: proc_syscall | |
1014 | * | |
1015 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1016 | */ | |
c906108c | 1017 | |
c3f6f71d JM |
1018 | int |
1019 | proc_syscall (pi) | |
1020 | procinfo *pi; | |
1021 | { | |
1022 | if (!pi->status_valid) | |
1023 | if (!proc_get_status (pi)) | |
1024 | return 0; | |
1025 | ||
1026 | #ifdef NEW_PROC_API | |
1027 | return pi->prstatus.pr_lwp.pr_syscall; | |
1028 | #else | |
1029 | return pi->prstatus.pr_syscall; | |
1030 | #endif | |
1031 | } | |
1032 | #endif /* PIOCSSPCACT */ | |
c906108c | 1033 | |
c3f6f71d JM |
1034 | /* |
1035 | * Function: proc_cursig: | |
1036 | * | |
1037 | * returns the pr_cursig field (current signal). | |
1038 | */ | |
c906108c | 1039 | |
c3f6f71d JM |
1040 | long |
1041 | proc_cursig (struct procinfo *pi) | |
1042 | { | |
1043 | if (!pi->status_valid) | |
1044 | if (!proc_get_status (pi)) | |
1045 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1046 | |
c3f6f71d JM |
1047 | #ifdef NEW_PROC_API |
1048 | return pi->prstatus.pr_lwp.pr_cursig; | |
1049 | #else | |
1050 | return pi->prstatus.pr_cursig; | |
1051 | #endif | |
1052 | } | |
c906108c | 1053 | |
c3f6f71d | 1054 | /* |
0d06e24b | 1055 | * Function: proc_modify_flag |
c3f6f71d JM |
1056 | * |
1057 | * === I appologize for the messiness of this function. | |
1058 | * === This is an area where the different versions of | |
1059 | * === /proc are more inconsistent than usual. MVS | |
1060 | * | |
1061 | * Set or reset any of the following process flags: | |
1062 | * PR_FORK -- forked child will inherit trace flags | |
1063 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1064 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1065 | * PR_ASYNC -- LWP's get to run/stop independently. |
1066 | * | |
1067 | * There are three methods for doing this function: | |
1068 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1069 | * [Sol6, Sol7, UW] | |
1070 | * 2) Middle: PIOCSET/PIOCRESET | |
1071 | * [Irix, Sol5] | |
1072 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1073 | * [OSF, Sol5] | |
1074 | * | |
1075 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1076 | * Note: OSF does not define PR_KLC. |
1077 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1078 | * |
1079 | * Arguments: | |
1080 | * pi -- the procinfo | |
1081 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1082 | * mode -- 1 for set, 0 for reset. | |
1083 | * | |
1084 | * Returns non-zero for success, zero for failure. | |
1085 | */ | |
c906108c | 1086 | |
c3f6f71d | 1087 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1088 | |
c3f6f71d JM |
1089 | static int |
1090 | proc_modify_flag (pi, flag, mode) | |
1091 | procinfo *pi; | |
1092 | long flag; | |
1093 | long mode; | |
1094 | { | |
1095 | long win = 0; /* default to fail */ | |
1096 | ||
1097 | /* | |
1098 | * These operations affect the process as a whole, and applying | |
1099 | * them to an individual LWP has the same meaning as applying them | |
1100 | * to the main process. Therefore, if we're ever called with a | |
1101 | * pointer to an LWP's procinfo, let's substitute the process's | |
1102 | * procinfo and avoid opening the LWP's file descriptor | |
1103 | * unnecessarily. | |
1104 | */ | |
1105 | ||
1106 | if (pi->pid != 0) | |
1107 | pi = find_procinfo_or_die (pi->pid, 0); | |
1108 | ||
1109 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1110 | /* First normalize the PCUNSET/PCRESET command opcode | |
1111 | (which for no obvious reason has a different definition | |
1112 | from one operating system to the next...) */ | |
1113 | #ifdef PCUNSET | |
1114 | #define GDBRESET PCUNSET | |
1115 | #endif | |
1116 | #ifdef PCRESET | |
1117 | #define GDBRESET PCRESET | |
c906108c | 1118 | #endif |
c3f6f71d JM |
1119 | { |
1120 | long arg[2]; | |
c906108c | 1121 | |
c3f6f71d JM |
1122 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1123 | arg[0] = PCSET; | |
1124 | else /* Reset the flag */ | |
1125 | arg[0] = GDBRESET; | |
c5aa993b | 1126 | |
c3f6f71d JM |
1127 | arg[1] = flag; |
1128 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1129 | } | |
1130 | #else | |
1131 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1132 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1133 | { | |
1134 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1135 | } | |
1136 | else /* Reset the flag */ | |
1137 | { | |
1138 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1139 | } | |
c906108c | 1140 | |
c3f6f71d JM |
1141 | #else |
1142 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1143 | switch (flag) { | |
1144 | case PR_RLC: | |
1145 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1146 | { | |
1147 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1148 | } | |
1149 | else /* Clear run-on-last-close */ | |
1150 | { | |
1151 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1152 | } | |
1153 | break; | |
1154 | case PR_FORK: | |
1155 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1156 | { | |
1157 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1158 | } | |
1159 | else /* Clear inherit-on-fork */ | |
1160 | { | |
1161 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1162 | } | |
1163 | break; | |
1164 | default: | |
1165 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1166 | break; | |
1167 | } | |
1168 | #endif | |
1169 | #endif | |
1170 | #endif | |
1171 | #undef GDBRESET | |
1172 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1173 | pi->status_valid = 0; | |
c906108c | 1174 | |
c3f6f71d JM |
1175 | if (!win) |
1176 | warning ("procfs: modify_flag failed to turn %s %s", | |
1177 | flag == PR_FORK ? "PR_FORK" : | |
1178 | flag == PR_RLC ? "PR_RLC" : | |
1179 | #ifdef PR_ASYNC | |
1180 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1181 | #endif |
1182 | #ifdef PR_KLC | |
1183 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1184 | #endif |
1185 | "<unknown flag>", | |
1186 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1187 | |
c3f6f71d JM |
1188 | return win; |
1189 | } | |
c906108c | 1190 | |
c3f6f71d JM |
1191 | /* |
1192 | * Function: proc_set_run_on_last_close | |
1193 | * | |
1194 | * Set the run_on_last_close flag. | |
1195 | * Process with all threads will become runnable | |
1196 | * when debugger closes all /proc fds. | |
1197 | * | |
1198 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1199 | */ |
1200 | ||
c3f6f71d JM |
1201 | int |
1202 | proc_set_run_on_last_close (pi) | |
1203 | procinfo *pi; | |
c906108c | 1204 | { |
c3f6f71d JM |
1205 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1206 | } | |
c906108c | 1207 | |
c3f6f71d JM |
1208 | /* |
1209 | * Function: proc_unset_run_on_last_close | |
1210 | * | |
1211 | * Reset the run_on_last_close flag. | |
1212 | * Process will NOT become runnable | |
1213 | * when debugger closes its file handles. | |
1214 | * | |
1215 | * Returns non-zero for success, zero for failure. | |
1216 | */ | |
c906108c | 1217 | |
c3f6f71d JM |
1218 | int |
1219 | proc_unset_run_on_last_close (pi) | |
1220 | procinfo *pi; | |
1221 | { | |
1222 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1223 | } |
1224 | ||
0d06e24b JM |
1225 | #ifdef PR_KLC |
1226 | /* | |
1227 | * Function: proc_set_kill_on_last_close | |
1228 | * | |
1229 | * Set the kill_on_last_close flag. | |
1230 | * Process with all threads will be killed when debugger | |
1231 | * closes all /proc fds (or debugger exits or dies). | |
1232 | * | |
1233 | * Returns non-zero for success, zero for failure. | |
1234 | */ | |
1235 | ||
1236 | int | |
1237 | proc_set_kill_on_last_close (pi) | |
1238 | procinfo *pi; | |
1239 | { | |
1240 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * Function: proc_unset_kill_on_last_close | |
1245 | * | |
1246 | * Reset the kill_on_last_close flag. | |
1247 | * Process will NOT be killed when debugger | |
1248 | * closes its file handles (or exits or dies). | |
1249 | * | |
1250 | * Returns non-zero for success, zero for failure. | |
1251 | */ | |
1252 | ||
1253 | int | |
1254 | proc_unset_kill_on_last_close (pi) | |
1255 | procinfo *pi; | |
1256 | { | |
1257 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1258 | } | |
1259 | #endif /* PR_KLC */ | |
1260 | ||
c906108c | 1261 | /* |
c3f6f71d JM |
1262 | * Function: proc_set_inherit_on_fork |
1263 | * | |
1264 | * Set inherit_on_fork flag. | |
1265 | * If the process forks a child while we are registered for events | |
1266 | * in the parent, then we will also recieve events from the child. | |
1267 | * | |
1268 | * Returns non-zero for success, zero for failure. | |
1269 | */ | |
c906108c | 1270 | |
c3f6f71d JM |
1271 | int |
1272 | proc_set_inherit_on_fork (pi) | |
1273 | procinfo *pi; | |
1274 | { | |
1275 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1276 | } | |
c5aa993b | 1277 | |
c3f6f71d JM |
1278 | /* |
1279 | * Function: proc_unset_inherit_on_fork | |
1280 | * | |
1281 | * Reset inherit_on_fork flag. | |
1282 | * If the process forks a child while we are registered for events | |
1283 | * in the parent, then we will NOT recieve events from the child. | |
1284 | * | |
1285 | * Returns non-zero for success, zero for failure. | |
1286 | */ | |
c906108c | 1287 | |
c3f6f71d JM |
1288 | int |
1289 | proc_unset_inherit_on_fork (pi) | |
1290 | procinfo *pi; | |
1291 | { | |
1292 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1293 | } | |
c906108c | 1294 | |
c3f6f71d JM |
1295 | #ifdef PR_ASYNC |
1296 | /* | |
1297 | * Function: proc_set_async | |
1298 | * | |
1299 | * Set PR_ASYNC flag. | |
1300 | * If one LWP stops because of a debug event (signal etc.), | |
1301 | * the remaining LWPs will continue to run. | |
1302 | * | |
1303 | * Returns non-zero for success, zero for failure. | |
1304 | */ | |
c906108c | 1305 | |
c3f6f71d JM |
1306 | int |
1307 | proc_set_async (pi) | |
1308 | procinfo *pi; | |
1309 | { | |
1310 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1311 | } | |
c906108c | 1312 | |
c3f6f71d JM |
1313 | /* |
1314 | * Function: proc_unset_async | |
1315 | * | |
1316 | * Reset PR_ASYNC flag. | |
1317 | * If one LWP stops because of a debug event (signal etc.), | |
1318 | * then all other LWPs will stop as well. | |
1319 | * | |
1320 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1321 | */ |
1322 | ||
c3f6f71d JM |
1323 | int |
1324 | proc_unset_async (pi) | |
1325 | procinfo *pi; | |
1326 | { | |
1327 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1328 | } | |
1329 | #endif /* PR_ASYNC */ | |
c906108c SS |
1330 | |
1331 | /* | |
c3f6f71d JM |
1332 | * Function: proc_stop_process |
1333 | * | |
1334 | * Request the process/LWP to stop. Does not wait. | |
1335 | * Returns non-zero for success, zero for failure. | |
1336 | */ | |
c906108c | 1337 | |
c3f6f71d JM |
1338 | int |
1339 | proc_stop_process (pi) | |
1340 | procinfo *pi; | |
1341 | { | |
1342 | int win; | |
c906108c | 1343 | |
c3f6f71d JM |
1344 | /* |
1345 | * We might conceivably apply this operation to an LWP, and | |
1346 | * the LWP's ctl file descriptor might not be open. | |
1347 | */ | |
c906108c | 1348 | |
c3f6f71d JM |
1349 | if (pi->ctl_fd == 0 && |
1350 | open_procinfo_files (pi, FD_CTL) == 0) | |
1351 | return 0; | |
1352 | else | |
1353 | { | |
1354 | #ifdef NEW_PROC_API | |
6c1a54b2 | 1355 | long cmd = PCSTOP; |
c3f6f71d JM |
1356 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1357 | #else /* ioctl method */ | |
1358 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1359 | /* Note: the call also reads the prstatus. */ | |
1360 | if (win) | |
1361 | { | |
1362 | pi->status_valid = 1; | |
1363 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1364 | proc_why (pi), | |
1365 | proc_what (pi), | |
1366 | proc_get_current_thread (pi)); | |
1367 | } | |
1368 | #endif | |
1369 | } | |
c906108c | 1370 | |
c3f6f71d JM |
1371 | return win; |
1372 | } | |
c5aa993b | 1373 | |
c3f6f71d JM |
1374 | /* |
1375 | * Function: proc_wait_for_stop | |
1376 | * | |
1377 | * Wait for the process or LWP to stop (block until it does). | |
1378 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1379 | */ |
1380 | ||
c3f6f71d JM |
1381 | int |
1382 | proc_wait_for_stop (pi) | |
1383 | procinfo *pi; | |
c906108c | 1384 | { |
c3f6f71d JM |
1385 | int win; |
1386 | ||
1387 | /* | |
1388 | * We should never have to apply this operation to any procinfo | |
1389 | * except the one for the main process. If that ever changes | |
1390 | * for any reason, then take out the following clause and | |
1391 | * replace it with one that makes sure the ctl_fd is open. | |
1392 | */ | |
1393 | ||
1394 | if (pi->tid != 0) | |
1395 | pi = find_procinfo_or_die (pi->pid, 0); | |
1396 | ||
1397 | #ifdef NEW_PROC_API | |
1398 | { | |
6c1a54b2 | 1399 | long cmd = PCWSTOP; |
c3f6f71d JM |
1400 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1401 | /* We been runnin' and we stopped -- need to update status. */ | |
1402 | pi->status_valid = 0; | |
1403 | } | |
1404 | #else /* ioctl method */ | |
1405 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1406 | /* Above call also refreshes the prstatus. */ | |
1407 | if (win) | |
1408 | { | |
1409 | pi->status_valid = 1; | |
1410 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1411 | proc_why (pi), | |
1412 | proc_what (pi), | |
1413 | proc_get_current_thread (pi)); | |
1414 | } | |
c906108c SS |
1415 | #endif |
1416 | ||
c3f6f71d | 1417 | return win; |
c906108c SS |
1418 | } |
1419 | ||
1420 | /* | |
c3f6f71d JM |
1421 | * Function: proc_run_process |
1422 | * | |
1423 | * Make the process or LWP runnable. | |
1424 | * Options (not all are implemented): | |
1425 | * - single-step | |
1426 | * - clear current fault | |
1427 | * - clear current signal | |
1428 | * - abort the current system call | |
1429 | * - stop as soon as finished with system call | |
1430 | * - (ioctl): set traced signal set | |
1431 | * - (ioctl): set held signal set | |
1432 | * - (ioctl): set traced fault set | |
1433 | * - (ioctl): set start pc (vaddr) | |
1434 | * Always clear the current fault. | |
1435 | * Clear the current signal if 'signo' is zero. | |
1436 | * | |
1437 | * Arguments: | |
1438 | * pi the process or LWP to operate on. | |
1439 | * step if true, set the process or LWP to trap after one instr. | |
1440 | * signo if zero, clear the current signal if any. | |
1441 | * if non-zero, set the current signal to this one. | |
1442 | * | |
1443 | * Returns non-zero for success, zero for failure. | |
1444 | */ | |
1445 | ||
1446 | int | |
1447 | proc_run_process (pi, step, signo) | |
1448 | procinfo *pi; | |
1449 | int step; | |
1450 | int signo; | |
1451 | { | |
1452 | int win; | |
1453 | int runflags; | |
1454 | ||
1455 | /* | |
1456 | * We will probably have to apply this operation to individual threads, | |
1457 | * so make sure the control file descriptor is open. | |
1458 | */ | |
1459 | ||
1460 | if (pi->ctl_fd == 0 && | |
1461 | open_procinfo_files (pi, FD_CTL) == 0) | |
1462 | { | |
1463 | return 0; | |
1464 | } | |
c906108c | 1465 | |
c3f6f71d JM |
1466 | runflags = PRCFAULT; /* always clear current fault */ |
1467 | if (step) | |
1468 | runflags |= PRSTEP; | |
1469 | if (signo == 0) | |
1470 | runflags |= PRCSIG; | |
1471 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1472 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1473 | |
c3f6f71d JM |
1474 | #ifdef NEW_PROC_API |
1475 | { | |
6c1a54b2 | 1476 | long cmd[2]; |
c906108c | 1477 | |
c3f6f71d JM |
1478 | cmd[0] = PCRUN; |
1479 | cmd[1] = runflags; | |
1480 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1481 | } | |
1482 | #else /* ioctl method */ | |
1483 | { | |
1484 | prrun_t prrun; | |
c906108c | 1485 | |
c3f6f71d JM |
1486 | memset (&prrun, 0, sizeof (prrun)); |
1487 | prrun.pr_flags = runflags; | |
1488 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1489 | } | |
1490 | #endif | |
c906108c | 1491 | |
c3f6f71d JM |
1492 | return win; |
1493 | } | |
c906108c | 1494 | |
c3f6f71d JM |
1495 | /* |
1496 | * Function: proc_set_traced_signals | |
1497 | * | |
1498 | * Register to trace signals in the process or LWP. | |
1499 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1500 | */ |
1501 | ||
c3f6f71d JM |
1502 | int |
1503 | proc_set_traced_signals (pi, sigset) | |
1504 | procinfo *pi; | |
1505 | sigset_t *sigset; | |
c906108c | 1506 | { |
c3f6f71d JM |
1507 | int win; |
1508 | ||
1509 | /* | |
1510 | * We should never have to apply this operation to any procinfo | |
1511 | * except the one for the main process. If that ever changes | |
1512 | * for any reason, then take out the following clause and | |
1513 | * replace it with one that makes sure the ctl_fd is open. | |
1514 | */ | |
1515 | ||
1516 | if (pi->tid != 0) | |
1517 | pi = find_procinfo_or_die (pi->pid, 0); | |
1518 | ||
1519 | #ifdef NEW_PROC_API | |
1520 | { | |
1521 | struct { | |
6c1a54b2 | 1522 | long cmd; |
c3f6f71d JM |
1523 | /* Use char array to avoid alignment issues. */ |
1524 | char sigset[sizeof (sigset_t)]; | |
1525 | } arg; | |
c906108c | 1526 | |
c3f6f71d JM |
1527 | arg.cmd = PCSTRACE; |
1528 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
c906108c | 1529 | |
c3f6f71d JM |
1530 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1531 | } | |
1532 | #else /* ioctl method */ | |
1533 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1534 | #endif | |
1535 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1536 | pi->status_valid = 0; | |
c906108c | 1537 | |
c3f6f71d JM |
1538 | if (!win) |
1539 | warning ("procfs: set_traced_signals failed"); | |
1540 | return win; | |
c906108c SS |
1541 | } |
1542 | ||
1543 | /* | |
c3f6f71d JM |
1544 | * Function: proc_set_traced_faults |
1545 | * | |
1546 | * Register to trace hardware faults in the process or LWP. | |
1547 | * Returns non-zero for success, zero for failure. | |
1548 | */ | |
c906108c | 1549 | |
c3f6f71d JM |
1550 | int |
1551 | proc_set_traced_faults (pi, fltset) | |
1552 | procinfo *pi; | |
1553 | fltset_t *fltset; | |
1554 | { | |
1555 | int win; | |
1556 | ||
1557 | /* | |
1558 | * We should never have to apply this operation to any procinfo | |
1559 | * except the one for the main process. If that ever changes | |
1560 | * for any reason, then take out the following clause and | |
1561 | * replace it with one that makes sure the ctl_fd is open. | |
1562 | */ | |
1563 | ||
1564 | if (pi->tid != 0) | |
1565 | pi = find_procinfo_or_die (pi->pid, 0); | |
1566 | ||
1567 | #ifdef NEW_PROC_API | |
1568 | { | |
1569 | struct { | |
6c1a54b2 | 1570 | long cmd; |
c3f6f71d JM |
1571 | /* Use char array to avoid alignment issues. */ |
1572 | char fltset[sizeof (fltset_t)]; | |
1573 | } arg; | |
c906108c | 1574 | |
c3f6f71d JM |
1575 | arg.cmd = PCSFAULT; |
1576 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1577 | |
c3f6f71d JM |
1578 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1579 | } | |
1580 | #else /* ioctl method */ | |
1581 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1582 | #endif | |
1583 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1584 | pi->status_valid = 0; | |
c906108c | 1585 | |
c3f6f71d JM |
1586 | return win; |
1587 | } | |
c5aa993b | 1588 | |
c3f6f71d JM |
1589 | /* |
1590 | * Function: proc_set_traced_sysentry | |
1591 | * | |
1592 | * Register to trace entry to system calls in the process or LWP. | |
1593 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1594 | */ |
1595 | ||
c3f6f71d JM |
1596 | int |
1597 | proc_set_traced_sysentry (pi, sysset) | |
1598 | procinfo *pi; | |
1599 | sysset_t *sysset; | |
c906108c | 1600 | { |
c3f6f71d JM |
1601 | int win; |
1602 | ||
1603 | /* | |
1604 | * We should never have to apply this operation to any procinfo | |
1605 | * except the one for the main process. If that ever changes | |
1606 | * for any reason, then take out the following clause and | |
1607 | * replace it with one that makes sure the ctl_fd is open. | |
1608 | */ | |
1609 | ||
1610 | if (pi->tid != 0) | |
1611 | pi = find_procinfo_or_die (pi->pid, 0); | |
1612 | ||
1613 | #ifdef NEW_PROC_API | |
1614 | { | |
1615 | struct { | |
6c1a54b2 | 1616 | long cmd; |
c3f6f71d JM |
1617 | /* Use char array to avoid alignment issues. */ |
1618 | char sysset[sizeof (sysset_t)]; | |
1619 | } arg; | |
1620 | ||
1621 | arg.cmd = PCSENTRY; | |
1622 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
1623 | ||
1624 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
1625 | } | |
1626 | #else /* ioctl method */ | |
1627 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1628 | #endif | |
1629 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1630 | pi->status_valid = 0; | |
1631 | ||
1632 | return win; | |
c906108c SS |
1633 | } |
1634 | ||
1635 | /* | |
c3f6f71d JM |
1636 | * Function: proc_set_traced_sysexit |
1637 | * | |
1638 | * Register to trace exit from system calls in the process or LWP. | |
1639 | * Returns non-zero for success, zero for failure. | |
1640 | */ | |
c906108c | 1641 | |
c3f6f71d JM |
1642 | int |
1643 | proc_set_traced_sysexit (pi, sysset) | |
1644 | procinfo *pi; | |
1645 | sysset_t *sysset; | |
1646 | { | |
1647 | int win; | |
1648 | ||
1649 | /* | |
1650 | * We should never have to apply this operation to any procinfo | |
1651 | * except the one for the main process. If that ever changes | |
1652 | * for any reason, then take out the following clause and | |
1653 | * replace it with one that makes sure the ctl_fd is open. | |
1654 | */ | |
1655 | ||
1656 | if (pi->tid != 0) | |
1657 | pi = find_procinfo_or_die (pi->pid, 0); | |
1658 | ||
1659 | #ifdef NEW_PROC_API | |
1660 | { | |
1661 | struct { | |
6c1a54b2 | 1662 | long cmd; |
c3f6f71d JM |
1663 | /* Use char array to avoid alignment issues. */ |
1664 | char sysset[sizeof (sysset_t)]; | |
1665 | } arg; | |
c906108c | 1666 | |
c3f6f71d JM |
1667 | arg.cmd = PCSEXIT; |
1668 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1669 | |
c3f6f71d JM |
1670 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1671 | } | |
1672 | #else /* ioctl method */ | |
1673 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1674 | #endif | |
1675 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1676 | pi->status_valid = 0; | |
c906108c | 1677 | |
c3f6f71d JM |
1678 | return win; |
1679 | } | |
c906108c | 1680 | |
c3f6f71d JM |
1681 | /* |
1682 | * Function: proc_set_held_signals | |
1683 | * | |
1684 | * Specify the set of blocked / held signals in the process or LWP. | |
1685 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1686 | */ |
1687 | ||
c3f6f71d JM |
1688 | int |
1689 | proc_set_held_signals (pi, sighold) | |
1690 | procinfo *pi; | |
1691 | sigset_t *sighold; | |
c906108c | 1692 | { |
c3f6f71d JM |
1693 | int win; |
1694 | ||
1695 | /* | |
1696 | * We should never have to apply this operation to any procinfo | |
1697 | * except the one for the main process. If that ever changes | |
1698 | * for any reason, then take out the following clause and | |
1699 | * replace it with one that makes sure the ctl_fd is open. | |
1700 | */ | |
1701 | ||
1702 | if (pi->tid != 0) | |
1703 | pi = find_procinfo_or_die (pi->pid, 0); | |
1704 | ||
1705 | #ifdef NEW_PROC_API | |
1706 | { | |
1707 | struct { | |
6c1a54b2 | 1708 | long cmd; |
c3f6f71d JM |
1709 | /* Use char array to avoid alignment issues. */ |
1710 | char hold[sizeof (sigset_t)]; | |
1711 | } arg; | |
1712 | ||
1713 | arg.cmd = PCSHOLD; | |
1714 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1715 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1716 | } | |
c906108c | 1717 | #else |
c3f6f71d | 1718 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1719 | #endif |
c3f6f71d JM |
1720 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1721 | pi->status_valid = 0; | |
1722 | ||
1723 | return win; | |
c906108c SS |
1724 | } |
1725 | ||
1726 | /* | |
c3f6f71d JM |
1727 | * Function: proc_get_pending_signals |
1728 | * | |
1729 | * returns the set of signals that are pending in the process or LWP. | |
1730 | * Will also copy the sigset if 'save' is non-zero. | |
1731 | */ | |
c906108c | 1732 | |
c3f6f71d JM |
1733 | sigset_t * |
1734 | proc_get_pending_signals (pi, save) | |
1735 | procinfo *pi; | |
1736 | sigset_t *save; | |
1737 | { | |
1738 | sigset_t *ret = NULL; | |
1739 | ||
1740 | /* | |
1741 | * We should never have to apply this operation to any procinfo | |
1742 | * except the one for the main process. If that ever changes | |
1743 | * for any reason, then take out the following clause and | |
1744 | * replace it with one that makes sure the ctl_fd is open. | |
1745 | */ | |
1746 | ||
1747 | if (pi->tid != 0) | |
1748 | pi = find_procinfo_or_die (pi->pid, 0); | |
1749 | ||
1750 | if (!pi->status_valid) | |
1751 | if (!proc_get_status (pi)) | |
1752 | return NULL; | |
1753 | ||
1754 | #ifdef NEW_PROC_API | |
1755 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1756 | #else | |
1757 | ret = &pi->prstatus.pr_sigpend; | |
1758 | #endif | |
1759 | if (save && ret) | |
1760 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1761 | |
c3f6f71d JM |
1762 | return ret; |
1763 | } | |
c906108c | 1764 | |
c3f6f71d JM |
1765 | /* |
1766 | * Function: proc_get_signal_actions | |
1767 | * | |
1768 | * returns the set of signal actions. | |
1769 | * Will also copy the sigactionset if 'save' is non-zero. | |
1770 | */ | |
c906108c | 1771 | |
c3f6f71d JM |
1772 | struct sigaction * |
1773 | proc_get_signal_actions (pi, save) | |
1774 | procinfo *pi; | |
1775 | struct sigaction *save; | |
1776 | { | |
1777 | struct sigaction *ret = NULL; | |
1778 | ||
1779 | /* | |
1780 | * We should never have to apply this operation to any procinfo | |
1781 | * except the one for the main process. If that ever changes | |
1782 | * for any reason, then take out the following clause and | |
1783 | * replace it with one that makes sure the ctl_fd is open. | |
1784 | */ | |
1785 | ||
1786 | if (pi->tid != 0) | |
1787 | pi = find_procinfo_or_die (pi->pid, 0); | |
1788 | ||
1789 | if (!pi->status_valid) | |
1790 | if (!proc_get_status (pi)) | |
1791 | return NULL; | |
1792 | ||
1793 | #ifdef NEW_PROC_API | |
1794 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1795 | #else | |
1796 | ret = &pi->prstatus.pr_action; | |
1797 | #endif | |
1798 | if (save && ret) | |
1799 | memcpy (save, ret, sizeof (struct sigaction)); | |
c906108c | 1800 | |
c3f6f71d JM |
1801 | return ret; |
1802 | } | |
c5aa993b | 1803 | |
c3f6f71d JM |
1804 | /* |
1805 | * Function: proc_get_held_signals | |
1806 | * | |
1807 | * returns the set of signals that are held / blocked. | |
1808 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
1809 | */ |
1810 | ||
c3f6f71d JM |
1811 | sigset_t * |
1812 | proc_get_held_signals (pi, save) | |
1813 | procinfo *pi; | |
1814 | sigset_t *save; | |
c906108c | 1815 | { |
c3f6f71d JM |
1816 | sigset_t *ret = NULL; |
1817 | ||
1818 | /* | |
1819 | * We should never have to apply this operation to any procinfo | |
1820 | * except the one for the main process. If that ever changes | |
1821 | * for any reason, then take out the following clause and | |
1822 | * replace it with one that makes sure the ctl_fd is open. | |
1823 | */ | |
1824 | ||
1825 | if (pi->tid != 0) | |
1826 | pi = find_procinfo_or_die (pi->pid, 0); | |
1827 | ||
1828 | #ifdef NEW_PROC_API | |
1829 | if (!pi->status_valid) | |
1830 | if (!proc_get_status (pi)) | |
1831 | return NULL; | |
1832 | ||
1833 | #ifdef UNIXWARE | |
1834 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1835 | #else |
c3f6f71d JM |
1836 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1837 | #endif /* UNIXWARE */ | |
1838 | #else /* not NEW_PROC_API */ | |
1839 | { | |
1840 | static sigset_t sigheld; | |
1841 | ||
1842 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1843 | ret = &sigheld; | |
1844 | } | |
1845 | #endif /* NEW_PROC_API */ | |
1846 | if (save && ret) | |
1847 | memcpy (save, ret, sizeof (sigset_t)); | |
1848 | ||
1849 | return ret; | |
c906108c SS |
1850 | } |
1851 | ||
c3f6f71d JM |
1852 | /* |
1853 | * Function: proc_get_traced_signals | |
1854 | * | |
1855 | * returns the set of signals that are traced / debugged. | |
1856 | * Will also copy the sigset if 'save' is non-zero. | |
1857 | */ | |
1858 | ||
1859 | sigset_t * | |
1860 | proc_get_traced_signals (pi, save) | |
1861 | procinfo *pi; | |
1862 | sigset_t *save; | |
c906108c | 1863 | { |
c3f6f71d JM |
1864 | sigset_t *ret = NULL; |
1865 | ||
1866 | /* | |
1867 | * We should never have to apply this operation to any procinfo | |
1868 | * except the one for the main process. If that ever changes | |
1869 | * for any reason, then take out the following clause and | |
1870 | * replace it with one that makes sure the ctl_fd is open. | |
1871 | */ | |
1872 | ||
1873 | if (pi->tid != 0) | |
1874 | pi = find_procinfo_or_die (pi->pid, 0); | |
1875 | ||
1876 | #ifdef NEW_PROC_API | |
1877 | if (!pi->status_valid) | |
1878 | if (!proc_get_status (pi)) | |
1879 | return NULL; | |
1880 | ||
1881 | ret = &pi->prstatus.pr_sigtrace; | |
1882 | #else | |
1883 | { | |
1884 | static sigset_t sigtrace; | |
1885 | ||
1886 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1887 | ret = &sigtrace; | |
1888 | } | |
c906108c | 1889 | #endif |
c3f6f71d JM |
1890 | if (save && ret) |
1891 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1892 | |
c3f6f71d JM |
1893 | return ret; |
1894 | } | |
c906108c | 1895 | |
c3f6f71d JM |
1896 | /* |
1897 | * Function: proc_trace_signal | |
1898 | * | |
1899 | * Add 'signo' to the set of signals that are traced. | |
1900 | * Returns non-zero for success, zero for failure. | |
1901 | */ | |
c906108c | 1902 | |
c3f6f71d JM |
1903 | int |
1904 | proc_trace_signal (pi, signo) | |
1905 | procinfo *pi; | |
1906 | int signo; | |
1907 | { | |
1908 | sigset_t temp; | |
1909 | ||
1910 | /* | |
1911 | * We should never have to apply this operation to any procinfo | |
1912 | * except the one for the main process. If that ever changes | |
1913 | * for any reason, then take out the following clause and | |
1914 | * replace it with one that makes sure the ctl_fd is open. | |
1915 | */ | |
1916 | ||
1917 | if (pi->tid != 0) | |
1918 | pi = find_procinfo_or_die (pi->pid, 0); | |
1919 | ||
1920 | if (pi) | |
c906108c | 1921 | { |
c3f6f71d | 1922 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1923 | { |
c3f6f71d JM |
1924 | praddset (&temp, signo); |
1925 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
1926 | } |
1927 | } | |
c5aa993b | 1928 | |
c3f6f71d JM |
1929 | return 0; /* failure */ |
1930 | } | |
c906108c | 1931 | |
c3f6f71d JM |
1932 | /* |
1933 | * Function: proc_ignore_signal | |
1934 | * | |
1935 | * Remove 'signo' from the set of signals that are traced. | |
1936 | * Returns non-zero for success, zero for failure. | |
1937 | */ | |
c906108c | 1938 | |
c3f6f71d JM |
1939 | int |
1940 | proc_ignore_signal (pi, signo) | |
1941 | procinfo *pi; | |
1942 | int signo; | |
1943 | { | |
1944 | sigset_t temp; | |
1945 | ||
1946 | /* | |
1947 | * We should never have to apply this operation to any procinfo | |
1948 | * except the one for the main process. If that ever changes | |
1949 | * for any reason, then take out the following clause and | |
1950 | * replace it with one that makes sure the ctl_fd is open. | |
1951 | */ | |
1952 | ||
1953 | if (pi->tid != 0) | |
1954 | pi = find_procinfo_or_die (pi->pid, 0); | |
1955 | ||
1956 | if (pi) | |
c906108c | 1957 | { |
c3f6f71d | 1958 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1959 | { |
c3f6f71d JM |
1960 | prdelset (&temp, signo); |
1961 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 1962 | } |
c906108c | 1963 | } |
c906108c | 1964 | |
c3f6f71d | 1965 | return 0; /* failure */ |
c906108c SS |
1966 | } |
1967 | ||
1968 | /* | |
c3f6f71d JM |
1969 | * Function: proc_get_traced_faults |
1970 | * | |
1971 | * returns the set of hardware faults that are traced /debugged. | |
1972 | * Will also copy the faultset if 'save' is non-zero. | |
1973 | */ | |
1974 | ||
1975 | fltset_t * | |
1976 | proc_get_traced_faults (pi, save) | |
1977 | procinfo *pi; | |
1978 | fltset_t *save; | |
1979 | { | |
1980 | fltset_t *ret = NULL; | |
1981 | ||
1982 | /* | |
1983 | * We should never have to apply this operation to any procinfo | |
1984 | * except the one for the main process. If that ever changes | |
1985 | * for any reason, then take out the following clause and | |
1986 | * replace it with one that makes sure the ctl_fd is open. | |
1987 | */ | |
1988 | ||
1989 | if (pi->tid != 0) | |
1990 | pi = find_procinfo_or_die (pi->pid, 0); | |
1991 | ||
1992 | #ifdef NEW_PROC_API | |
1993 | if (!pi->status_valid) | |
1994 | if (!proc_get_status (pi)) | |
1995 | return NULL; | |
1996 | ||
1997 | ret = &pi->prstatus.pr_flttrace; | |
1998 | #else | |
1999 | { | |
2000 | static fltset_t flttrace; | |
2001 | ||
2002 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2003 | ret = &flttrace; | |
2004 | } | |
2005 | #endif | |
2006 | if (save && ret) | |
2007 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2008 | |
c3f6f71d JM |
2009 | return ret; |
2010 | } | |
c906108c | 2011 | |
c3f6f71d JM |
2012 | /* |
2013 | * Function: proc_get_traced_sysentry | |
2014 | * | |
2015 | * returns the set of syscalls that are traced /debugged on entry. | |
2016 | * Will also copy the syscall set if 'save' is non-zero. | |
2017 | */ | |
c906108c | 2018 | |
c3f6f71d JM |
2019 | sysset_t * |
2020 | proc_get_traced_sysentry (pi, save) | |
2021 | procinfo *pi; | |
2022 | sysset_t *save; | |
2023 | { | |
2024 | sysset_t *ret = NULL; | |
2025 | ||
2026 | /* | |
2027 | * We should never have to apply this operation to any procinfo | |
2028 | * except the one for the main process. If that ever changes | |
2029 | * for any reason, then take out the following clause and | |
2030 | * replace it with one that makes sure the ctl_fd is open. | |
2031 | */ | |
2032 | ||
2033 | if (pi->tid != 0) | |
2034 | pi = find_procinfo_or_die (pi->pid, 0); | |
2035 | ||
2036 | #ifdef NEW_PROC_API | |
2037 | if (!pi->status_valid) | |
2038 | if (!proc_get_status (pi)) | |
2039 | return NULL; | |
2040 | ||
2041 | ret = &pi->prstatus.pr_sysentry; | |
2042 | #else | |
2043 | { | |
2044 | static sysset_t sysentry; | |
c906108c | 2045 | |
c3f6f71d JM |
2046 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2047 | ret = &sysentry; | |
2048 | } | |
2049 | #endif | |
2050 | if (save && ret) | |
2051 | memcpy (save, ret, sizeof (sysset_t)); | |
c906108c | 2052 | |
c3f6f71d JM |
2053 | return ret; |
2054 | } | |
c5aa993b | 2055 | |
c3f6f71d JM |
2056 | /* |
2057 | * Function: proc_get_traced_sysexit | |
2058 | * | |
2059 | * returns the set of syscalls that are traced /debugged on exit. | |
2060 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2061 | */ |
2062 | ||
c3f6f71d JM |
2063 | sysset_t * |
2064 | proc_get_traced_sysexit (pi, save) | |
2065 | procinfo *pi; | |
2066 | sysset_t *save; | |
c906108c | 2067 | { |
c3f6f71d JM |
2068 | sysset_t * ret = NULL; |
2069 | ||
2070 | /* | |
2071 | * We should never have to apply this operation to any procinfo | |
2072 | * except the one for the main process. If that ever changes | |
2073 | * for any reason, then take out the following clause and | |
2074 | * replace it with one that makes sure the ctl_fd is open. | |
2075 | */ | |
2076 | ||
2077 | if (pi->tid != 0) | |
2078 | pi = find_procinfo_or_die (pi->pid, 0); | |
2079 | ||
2080 | #ifdef NEW_PROC_API | |
2081 | if (!pi->status_valid) | |
2082 | if (!proc_get_status (pi)) | |
2083 | return NULL; | |
2084 | ||
2085 | ret = &pi->prstatus.pr_sysexit; | |
2086 | #else | |
2087 | { | |
2088 | static sysset_t sysexit; | |
c5aa993b | 2089 | |
c3f6f71d JM |
2090 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2091 | ret = &sysexit; | |
2092 | } | |
2093 | #endif | |
2094 | if (save && ret) | |
2095 | memcpy (save, ret, sizeof (sysset_t)); | |
2096 | ||
2097 | return ret; | |
2098 | } | |
c906108c | 2099 | |
c3f6f71d JM |
2100 | /* |
2101 | * Function: proc_clear_current_fault | |
2102 | * | |
2103 | * The current fault (if any) is cleared; the associated signal | |
2104 | * will not be sent to the process or LWP when it resumes. | |
2105 | * Returns non-zero for success, zero for failure. | |
2106 | */ | |
c906108c | 2107 | |
c3f6f71d JM |
2108 | int |
2109 | proc_clear_current_fault (pi) | |
2110 | procinfo *pi; | |
2111 | { | |
2112 | int win; | |
2113 | ||
2114 | /* | |
2115 | * We should never have to apply this operation to any procinfo | |
2116 | * except the one for the main process. If that ever changes | |
2117 | * for any reason, then take out the following clause and | |
2118 | * replace it with one that makes sure the ctl_fd is open. | |
2119 | */ | |
2120 | ||
2121 | if (pi->tid != 0) | |
2122 | pi = find_procinfo_or_die (pi->pid, 0); | |
2123 | ||
2124 | #ifdef NEW_PROC_API | |
2125 | { | |
6c1a54b2 | 2126 | long cmd = PCCFAULT; |
c3f6f71d JM |
2127 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2128 | } | |
2129 | #else | |
2130 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2131 | #endif | |
2132 | ||
2133 | return win; | |
c906108c SS |
2134 | } |
2135 | ||
2136 | /* | |
c3f6f71d JM |
2137 | * Function: proc_set_current_signal |
2138 | * | |
2139 | * Set the "current signal" that will be delivered next to the process. | |
2140 | * NOTE: semantics are different from those of KILL. | |
2141 | * This signal will be delivered to the process or LWP | |
2142 | * immediately when it is resumed (even if the signal is held/blocked); | |
2143 | * it will NOT immediately cause another event of interest, and will NOT | |
2144 | * first trap back to the debugger. | |
2145 | * | |
2146 | * Returns non-zero for success, zero for failure. | |
2147 | */ | |
2148 | ||
2149 | int | |
2150 | proc_set_current_signal (pi, signo) | |
2151 | procinfo *pi; | |
2152 | int signo; | |
2153 | { | |
2154 | int win; | |
2155 | struct { | |
6c1a54b2 | 2156 | long cmd; |
c3f6f71d JM |
2157 | /* Use char array to avoid alignment issues. */ |
2158 | char sinfo[sizeof (struct siginfo)]; | |
2159 | } arg; | |
2160 | struct siginfo *mysinfo; | |
2161 | ||
2162 | /* | |
2163 | * We should never have to apply this operation to any procinfo | |
2164 | * except the one for the main process. If that ever changes | |
2165 | * for any reason, then take out the following clause and | |
2166 | * replace it with one that makes sure the ctl_fd is open. | |
2167 | */ | |
2168 | ||
2169 | if (pi->tid != 0) | |
2170 | pi = find_procinfo_or_die (pi->pid, 0); | |
2171 | ||
2172 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2173 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2174 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2175 | * it messes up the current signal. Work around the kernel bug. | |
2176 | */ | |
2177 | if (signo > 0 && | |
2178 | signo == proc_cursig (pi)) | |
2179 | return 1; /* I assume this is a success? */ | |
2180 | #endif | |
2181 | ||
2182 | /* The pointer is just a type alias. */ | |
2183 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2184 | mysinfo->si_signo = signo; | |
2185 | mysinfo->si_code = 0; | |
2186 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2187 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2188 | ||
2189 | #ifdef NEW_PROC_API | |
2190 | arg.cmd = PCSSIG; | |
2191 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2192 | #else | |
2193 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2194 | #endif | |
c906108c | 2195 | |
c3f6f71d JM |
2196 | return win; |
2197 | } | |
c906108c | 2198 | |
c3f6f71d JM |
2199 | /* |
2200 | * Function: proc_clear_current_signal | |
2201 | * | |
2202 | * The current signal (if any) is cleared, and | |
2203 | * is not sent to the process or LWP when it resumes. | |
2204 | * Returns non-zero for success, zero for failure. | |
2205 | */ | |
c906108c | 2206 | |
c3f6f71d JM |
2207 | int |
2208 | proc_clear_current_signal (pi) | |
2209 | procinfo *pi; | |
2210 | { | |
2211 | int win; | |
2212 | ||
2213 | /* | |
2214 | * We should never have to apply this operation to any procinfo | |
2215 | * except the one for the main process. If that ever changes | |
2216 | * for any reason, then take out the following clause and | |
2217 | * replace it with one that makes sure the ctl_fd is open. | |
2218 | */ | |
2219 | ||
2220 | if (pi->tid != 0) | |
2221 | pi = find_procinfo_or_die (pi->pid, 0); | |
2222 | ||
2223 | #ifdef NEW_PROC_API | |
2224 | { | |
2225 | struct { | |
6c1a54b2 | 2226 | long cmd; |
c3f6f71d JM |
2227 | /* Use char array to avoid alignment issues. */ |
2228 | char sinfo[sizeof (struct siginfo)]; | |
2229 | } arg; | |
2230 | struct siginfo *mysinfo; | |
2231 | ||
2232 | arg.cmd = PCSSIG; | |
2233 | /* The pointer is just a type alias. */ | |
2234 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2235 | mysinfo->si_signo = 0; | |
2236 | mysinfo->si_code = 0; | |
2237 | mysinfo->si_errno = 0; | |
2238 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2239 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2240 | ||
2241 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2242 | } | |
2243 | #else | |
2244 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2245 | #endif | |
c906108c | 2246 | |
c3f6f71d JM |
2247 | return win; |
2248 | } | |
c906108c | 2249 | |
c3f6f71d JM |
2250 | /* |
2251 | * Function: proc_get_gregs | |
2252 | * | |
2253 | * Get the general registers for the process or LWP. | |
2254 | * Returns non-zero for success, zero for failure. | |
2255 | */ | |
c906108c | 2256 | |
c3f6f71d JM |
2257 | gdb_gregset_t * |
2258 | proc_get_gregs (pi) | |
2259 | procinfo *pi; | |
2260 | { | |
2261 | if (!pi->status_valid || !pi->gregs_valid) | |
2262 | if (!proc_get_status (pi)) | |
2263 | return NULL; | |
2264 | ||
2265 | /* | |
2266 | * OK, sorry about the ifdef's. | |
2267 | * There's three cases instead of two, because | |
2268 | * in this instance Unixware and Solaris/RW differ. | |
2269 | */ | |
2270 | ||
2271 | #ifdef NEW_PROC_API | |
2272 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2273 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2274 | #else /* not Unixware */ | |
2275 | return &pi->prstatus.pr_lwp.pr_reg; | |
2276 | #endif /* Unixware */ | |
2277 | #else /* not NEW_PROC_API */ | |
2278 | return &pi->prstatus.pr_reg; | |
2279 | #endif /* NEW_PROC_API */ | |
2280 | } | |
c5aa993b | 2281 | |
c3f6f71d JM |
2282 | /* |
2283 | * Function: proc_get_fpregs | |
2284 | * | |
2285 | * Get the floating point registers for the process or LWP. | |
2286 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2287 | */ |
2288 | ||
c3f6f71d JM |
2289 | gdb_fpregset_t * |
2290 | proc_get_fpregs (pi) | |
2291 | procinfo *pi; | |
c906108c | 2292 | { |
c3f6f71d JM |
2293 | #ifdef NEW_PROC_API |
2294 | if (!pi->status_valid || !pi->fpregs_valid) | |
2295 | if (!proc_get_status (pi)) | |
2296 | return NULL; | |
2297 | ||
2298 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2299 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2300 | #else | |
2301 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2302 | #endif /* Unixware */ | |
c5aa993b | 2303 | |
c3f6f71d JM |
2304 | #else /* not NEW_PROC_API */ |
2305 | if (pi->fpregs_valid) | |
2306 | return &pi->fpregset; /* already got 'em */ | |
2307 | else | |
c906108c | 2308 | { |
c3f6f71d JM |
2309 | if (pi->ctl_fd == 0 && |
2310 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2311 | { |
c3f6f71d | 2312 | return NULL; |
c906108c | 2313 | } |
c3f6f71d | 2314 | else |
c906108c | 2315 | { |
c3f6f71d JM |
2316 | #ifdef PIOCTGFPREG |
2317 | struct { | |
2318 | long pr_count; | |
2319 | tid_t pr_error_thread; | |
2320 | tfpregset_t thread_1; | |
2321 | } thread_fpregs; | |
2322 | ||
2323 | thread_fpregs.pr_count = 1; | |
2324 | thread_fpregs.thread_1.tid = pi->tid; | |
2325 | ||
2326 | if (pi->tid == 0 && | |
2327 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2328 | { | |
2329 | pi->fpregs_valid = 1; | |
2330 | return &pi->fpregset; /* got 'em now! */ | |
2331 | } | |
2332 | else if (pi->tid != 0 && | |
2333 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2334 | { | |
2335 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2336 | sizeof (pi->fpregset)); | |
2337 | pi->fpregs_valid = 1; | |
2338 | return &pi->fpregset; /* got 'em now! */ | |
2339 | } | |
2340 | else | |
2341 | { | |
2342 | return NULL; | |
2343 | } | |
2344 | #else | |
2345 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2346 | { | |
2347 | pi->fpregs_valid = 1; | |
2348 | return &pi->fpregset; /* got 'em now! */ | |
2349 | } | |
2350 | else | |
2351 | { | |
2352 | return NULL; | |
2353 | } | |
2354 | #endif | |
c906108c | 2355 | } |
c906108c | 2356 | } |
c3f6f71d | 2357 | #endif |
c906108c SS |
2358 | } |
2359 | ||
c3f6f71d JM |
2360 | /* |
2361 | * Function: proc_set_gregs | |
2362 | * | |
2363 | * Write the general registers back to the process or LWP. | |
2364 | * Returns non-zero for success, zero for failure. | |
2365 | */ | |
2366 | ||
2367 | int | |
2368 | proc_set_gregs (pi) | |
2369 | procinfo *pi; | |
c906108c | 2370 | { |
c3f6f71d JM |
2371 | gdb_gregset_t *gregs; |
2372 | int win; | |
c5aa993b | 2373 | |
c3f6f71d JM |
2374 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2375 | return 0; /* get_regs has already warned */ | |
2376 | ||
2377 | if (pi->ctl_fd == 0 && | |
2378 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2379 | { |
c3f6f71d | 2380 | return 0; |
c906108c | 2381 | } |
c3f6f71d | 2382 | else |
c906108c | 2383 | { |
c3f6f71d JM |
2384 | #ifdef NEW_PROC_API |
2385 | struct { | |
6c1a54b2 | 2386 | long cmd; |
c3f6f71d JM |
2387 | /* Use char array to avoid alignment issues. */ |
2388 | char gregs[sizeof (gdb_gregset_t)]; | |
2389 | } arg; | |
2390 | ||
2391 | arg.cmd = PCSREG; | |
2392 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2393 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2394 | #else | |
2395 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2396 | #endif | |
c906108c | 2397 | } |
c3f6f71d JM |
2398 | |
2399 | /* Policy: writing the regs invalidates our cache. */ | |
2400 | pi->gregs_valid = 0; | |
2401 | return win; | |
c906108c SS |
2402 | } |
2403 | ||
c3f6f71d JM |
2404 | /* |
2405 | * Function: proc_set_fpregs | |
2406 | * | |
2407 | * Modify the floating point register set of the process or LWP. | |
2408 | * Returns non-zero for success, zero for failure. | |
2409 | */ | |
2410 | ||
2411 | int | |
2412 | proc_set_fpregs (pi) | |
2413 | procinfo *pi; | |
c906108c | 2414 | { |
c3f6f71d JM |
2415 | gdb_fpregset_t *fpregs; |
2416 | int win; | |
2417 | ||
2418 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2419 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2420 | |
c3f6f71d JM |
2421 | if (pi->ctl_fd == 0 && |
2422 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2423 | { |
c3f6f71d | 2424 | return 0; |
c906108c | 2425 | } |
c3f6f71d | 2426 | else |
c906108c | 2427 | { |
c3f6f71d JM |
2428 | #ifdef NEW_PROC_API |
2429 | struct { | |
6c1a54b2 | 2430 | long cmd; |
c3f6f71d JM |
2431 | /* Use char array to avoid alignment issues. */ |
2432 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2433 | } arg; | |
2434 | ||
2435 | arg.cmd = PCSFPREG; | |
2436 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2437 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2438 | #else | |
2439 | #ifdef PIOCTSFPREG | |
2440 | if (pi->tid == 0) | |
2441 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2442 | else | |
2443 | { | |
2444 | struct { | |
2445 | long pr_count; | |
2446 | tid_t pr_error_thread; | |
2447 | tfpregset_t thread_1; | |
2448 | } thread_fpregs; | |
2449 | ||
2450 | thread_fpregs.pr_count = 1; | |
2451 | thread_fpregs.thread_1.tid = pi->tid; | |
2452 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2453 | sizeof (*fpregs)); | |
2454 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2455 | } | |
2456 | #else | |
2457 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2458 | #endif /* osf PIOCTSFPREG */ | |
2459 | #endif /* NEW_PROC_API */ | |
c906108c | 2460 | } |
c3f6f71d JM |
2461 | |
2462 | /* Policy: writing the regs invalidates our cache. */ | |
2463 | pi->fpregs_valid = 0; | |
2464 | return win; | |
c906108c SS |
2465 | } |
2466 | ||
2467 | /* | |
c3f6f71d JM |
2468 | * Function: proc_kill |
2469 | * | |
2470 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2471 | * Returns non-zero for success, zero for failure. | |
2472 | */ | |
c906108c | 2473 | |
c3f6f71d JM |
2474 | int |
2475 | proc_kill (pi, signo) | |
2476 | procinfo *pi; | |
2477 | int signo; | |
2478 | { | |
2479 | int win; | |
c906108c | 2480 | |
c3f6f71d JM |
2481 | /* |
2482 | * We might conceivably apply this operation to an LWP, and | |
2483 | * the LWP's ctl file descriptor might not be open. | |
2484 | */ | |
c906108c | 2485 | |
c3f6f71d JM |
2486 | if (pi->ctl_fd == 0 && |
2487 | open_procinfo_files (pi, FD_CTL) == 0) | |
2488 | { | |
2489 | return 0; | |
2490 | } | |
2491 | else | |
2492 | { | |
2493 | #ifdef NEW_PROC_API | |
6c1a54b2 | 2494 | long cmd[2]; |
c906108c | 2495 | |
c3f6f71d JM |
2496 | cmd[0] = PCKILL; |
2497 | cmd[1] = signo; | |
2498 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2499 | #else /* ioctl method */ | |
2500 | /* FIXME: do I need the Alpha OSF fixups present in | |
2501 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2502 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2503 | #endif | |
2504 | } | |
c906108c | 2505 | |
c3f6f71d JM |
2506 | return win; |
2507 | } | |
c906108c | 2508 | |
c3f6f71d JM |
2509 | /* |
2510 | * Function: proc_parent_pid | |
2511 | * | |
2512 | * Find the pid of the process that started this one. | |
2513 | * Returns the parent process pid, or zero. | |
c906108c SS |
2514 | */ |
2515 | ||
c3f6f71d JM |
2516 | int |
2517 | proc_parent_pid (pi) | |
2518 | procinfo *pi; | |
c906108c | 2519 | { |
c3f6f71d JM |
2520 | /* |
2521 | * We should never have to apply this operation to any procinfo | |
2522 | * except the one for the main process. If that ever changes | |
2523 | * for any reason, then take out the following clause and | |
2524 | * replace it with one that makes sure the ctl_fd is open. | |
2525 | */ | |
2526 | ||
2527 | if (pi->tid != 0) | |
2528 | pi = find_procinfo_or_die (pi->pid, 0); | |
2529 | ||
2530 | if (!pi->status_valid) | |
2531 | if (!proc_get_status (pi)) | |
2532 | return 0; | |
c5aa993b | 2533 | |
c3f6f71d JM |
2534 | return pi->prstatus.pr_ppid; |
2535 | } | |
2536 | ||
2537 | ||
2538 | /* | |
2539 | * Function: proc_set_watchpoint | |
2540 | * | |
2541 | */ | |
2542 | ||
2543 | int | |
2544 | proc_set_watchpoint (pi, addr, len, wflags) | |
03905a3c MS |
2545 | procinfo *pi; |
2546 | CORE_ADDR addr; | |
c3f6f71d JM |
2547 | int len; |
2548 | int wflags; | |
2549 | { | |
2550 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2551 | return 0; | |
2552 | #else | |
2553 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2554 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2555 | return 0; | |
2556 | #else | |
2557 | struct { | |
6c1a54b2 | 2558 | long cmd; |
c3f6f71d JM |
2559 | char watch[sizeof (prwatch_t)]; |
2560 | } arg; | |
2561 | prwatch_t *pwatch; | |
2562 | ||
2563 | pwatch = (prwatch_t *) &arg.watch; | |
ac2e2ef7 | 2564 | pwatch->pr_vaddr = address_to_host_pointer (addr); |
c3f6f71d JM |
2565 | pwatch->pr_size = len; |
2566 | pwatch->pr_wflags = wflags; | |
2567 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2568 | arg.cmd = PCWATCH; | |
2569 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2570 | #else | |
2571 | #if defined (PIOCSWATCH) | |
2572 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2573 | #else | |
2574 | return 0; /* Fail */ | |
2575 | #endif | |
2576 | #endif | |
2577 | #endif | |
2578 | #endif | |
c906108c SS |
2579 | } |
2580 | ||
2581 | /* | |
c3f6f71d JM |
2582 | * Function: proc_iterate_over_mappings |
2583 | * | |
2584 | * Given a pointer to a function, call that function once for every | |
2585 | * mapped address space in the process. The callback function | |
2586 | * receives an open file descriptor for the file corresponding to | |
2587 | * that mapped address space (if there is one), and the base address | |
2588 | * of the mapped space. Quit when the callback function returns a | |
2589 | * nonzero value, or at teh end of the mappings. | |
2590 | * | |
2591 | * Returns: the first non-zero return value of the callback function, | |
2592 | * or zero. | |
2593 | */ | |
c906108c | 2594 | |
c3f6f71d JM |
2595 | /* FIXME: it's probably a waste to cache this FD. |
2596 | It doesn't get called that often... and if I open it | |
2597 | every time, I don't need to lseek it. */ | |
2598 | int | |
2599 | proc_iterate_over_mappings (func) | |
507f3c78 | 2600 | int (*func) (int, CORE_ADDR); |
c3f6f71d JM |
2601 | { |
2602 | struct prmap *map; | |
2603 | procinfo *pi; | |
0d06e24b | 2604 | #ifndef NEW_PROC_API /* avoid compiler warning */ |
0fda6bd2 JM |
2605 | int nmaps = 0; |
2606 | int i; | |
2607 | #else | |
2608 | int map_fd; | |
2609 | char pathname[MAX_PROC_NAME_SIZE]; | |
0d06e24b | 2610 | #endif |
c3f6f71d | 2611 | int funcstat = 0; |
0fda6bd2 | 2612 | int fd; |
c906108c | 2613 | |
c3f6f71d | 2614 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); |
c906108c | 2615 | |
c3f6f71d JM |
2616 | #ifdef NEW_PROC_API |
2617 | /* Open map fd. */ | |
2618 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
2619 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
2620 | proc_error (pi, "proc_iterate_over_mappings (open)", __LINE__); | |
c906108c | 2621 | |
c3f6f71d | 2622 | /* Make sure it gets closed again. */ |
004527cb | 2623 | make_cleanup_close (map_fd); |
c906108c | 2624 | |
c3f6f71d JM |
2625 | /* Allocate space for mapping (lifetime only for this function). */ |
2626 | map = alloca (sizeof (struct prmap)); | |
c906108c | 2627 | |
c3f6f71d JM |
2628 | /* Now read the mappings from the file, |
2629 | open a file descriptor for those that have a name, | |
2630 | and call the callback function. */ | |
2631 | while (read (map_fd, | |
2632 | (void *) map, | |
2633 | sizeof (struct prmap)) == sizeof (struct prmap)) | |
2634 | { | |
2635 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
c906108c | 2636 | |
c3f6f71d JM |
2637 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
2638 | break; /* sanity */ | |
c906108c | 2639 | |
c3f6f71d JM |
2640 | if (map->pr_mapname[0] == 0) |
2641 | { | |
2642 | fd = -1; /* no map file */ | |
2643 | } | |
2644 | else | |
2645 | { | |
2646 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
2647 | /* Note: caller's responsibility to close this fd! */ | |
2648 | fd = open (name, O_RDONLY); | |
2649 | /* Note: we don't test the above call for failure; | |
2650 | we just pass the FD on as given. Sometimes there is | |
2651 | no file, so the ioctl may return failure, but that's | |
2652 | not a problem. */ | |
2653 | } | |
c906108c | 2654 | |
c3f6f71d JM |
2655 | /* Stop looping if the callback returns non-zero. */ |
2656 | if ((funcstat = (*func) (fd, (CORE_ADDR) map->pr_vaddr)) != 0) | |
2657 | break; | |
2658 | } | |
2659 | #else | |
2660 | /* Get the number of mapping entries. */ | |
2661 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmaps) < 0) | |
2662 | proc_error (pi, "proc_iterate_over_mappings (PIOCNMAP)", __LINE__); | |
2663 | ||
2664 | /* Allocate space for mappings (lifetime only this function). */ | |
2665 | map = (struct prmap *) alloca ((nmaps + 1) * sizeof (struct prmap)); | |
2666 | ||
2667 | /* Read in all the mappings. */ | |
2668 | if (ioctl (pi->ctl_fd, PIOCMAP, map) < 0) | |
2669 | proc_error (pi, "proc_iterate_over_mappings (PIOCMAP)", __LINE__); | |
2670 | ||
2671 | /* Now loop through the mappings, open an fd for each, and | |
2672 | call the callback function. */ | |
2673 | for (i = 0; | |
2674 | i < nmaps && map[i].pr_size != 0; | |
2675 | i++) | |
2676 | { | |
2677 | /* Note: caller's responsibility to close this fd! */ | |
2678 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map[i].pr_vaddr); | |
2679 | /* Note: we don't test the above call for failure; | |
2680 | we just pass the FD on as given. Sometimes there is | |
2681 | no file, so the ioctl may return failure, but that's | |
2682 | not a problem. */ | |
2683 | ||
2684 | /* Stop looping if the callback returns non-zero. */ | |
ac2e2ef7 AC |
2685 | funcstat = (*func) (fd, host_pointer_to_address (map[i].pr_vaddr)); |
2686 | if (funcstat != 0) | |
c3f6f71d JM |
2687 | break; |
2688 | } | |
c906108c | 2689 | #endif |
c906108c | 2690 | |
c3f6f71d JM |
2691 | return funcstat; |
2692 | } | |
c906108c | 2693 | |
c3f6f71d | 2694 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2695 | |
c3f6f71d | 2696 | #include <sys/sysi86.h> |
c906108c | 2697 | |
c3f6f71d JM |
2698 | /* |
2699 | * Function: proc_get_LDT_entry | |
2700 | * | |
2701 | * Inputs: | |
2702 | * procinfo *pi; | |
2703 | * int key; | |
2704 | * | |
2705 | * The 'key' is actually the value of the lower 16 bits of | |
2706 | * the GS register for the LWP that we're interested in. | |
2707 | * | |
2708 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2709 | */ |
2710 | ||
c3f6f71d JM |
2711 | struct ssd * |
2712 | proc_get_LDT_entry (pi, key) | |
2713 | procinfo *pi; | |
2714 | int key; | |
c906108c | 2715 | { |
c3f6f71d JM |
2716 | static struct ssd *ldt_entry = NULL; |
2717 | #ifdef NEW_PROC_API | |
2718 | char pathname[MAX_PROC_NAME_SIZE]; | |
2719 | struct cleanup *old_chain = NULL; | |
2720 | int fd; | |
2721 | ||
2722 | /* Allocate space for one LDT entry. | |
2723 | This alloc must persist, because we return a pointer to it. */ | |
2724 | if (ldt_entry == NULL) | |
2725 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2726 | ||
2727 | /* Open the file descriptor for the LDT table. */ | |
2728 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
2729 | if ((fd = open (pathname, O_RDONLY)) < 0) | |
c906108c | 2730 | { |
c3f6f71d JM |
2731 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2732 | return NULL; | |
c906108c | 2733 | } |
c3f6f71d | 2734 | /* Make sure it gets closed again! */ |
004527cb | 2735 | old_chain = make_cleanup_close (fd); |
c906108c | 2736 | |
c3f6f71d JM |
2737 | /* Now 'read' thru the table, find a match and return it. */ |
2738 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2739 | { |
c3f6f71d JM |
2740 | if (ldt_entry->sel == 0 && |
2741 | ldt_entry->bo == 0 && | |
2742 | ldt_entry->acc1 == 0 && | |
2743 | ldt_entry->acc2 == 0) | |
2744 | break; /* end of table */ | |
2745 | /* If key matches, return this entry. */ | |
2746 | if (ldt_entry->sel == key) | |
2747 | return ldt_entry; | |
c906108c | 2748 | } |
c3f6f71d JM |
2749 | /* Loop ended, match not found. */ |
2750 | return NULL; | |
2751 | #else | |
2752 | int nldt, i; | |
2753 | static int nalloc = 0; | |
c906108c | 2754 | |
c3f6f71d JM |
2755 | /* Get the number of LDT entries. */ |
2756 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2757 | { |
c3f6f71d JM |
2758 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2759 | return NULL; | |
c906108c SS |
2760 | } |
2761 | ||
c3f6f71d JM |
2762 | /* Allocate space for the number of LDT entries. */ |
2763 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2764 | if (nldt > nalloc) | |
c906108c | 2765 | { |
c3f6f71d JM |
2766 | ldt_entry = (struct ssd *) |
2767 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
2768 | nalloc = nldt; | |
2769 | } | |
2770 | ||
2771 | /* Read the whole table in one gulp. */ | |
2772 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2773 | { | |
2774 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2775 | return NULL; | |
c906108c SS |
2776 | } |
2777 | ||
c3f6f71d JM |
2778 | /* Search the table and return the (first) entry matching 'key'. */ |
2779 | for (i = 0; i < nldt; i++) | |
2780 | if (ldt_entry[i].sel == key) | |
2781 | return &ldt_entry[i]; | |
c906108c | 2782 | |
c3f6f71d JM |
2783 | /* Loop ended, match not found. */ |
2784 | return NULL; | |
2785 | #endif | |
2786 | } | |
c906108c | 2787 | |
c3f6f71d | 2788 | #endif /* TM_I386SOL2_H */ |
c906108c | 2789 | |
c3f6f71d | 2790 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2791 | |
c3f6f71d | 2792 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2793 | |
c3f6f71d JM |
2794 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2795 | since there is a different way to do threads on every OS. */ | |
c906108c | 2796 | |
c3f6f71d JM |
2797 | /* |
2798 | * Function: proc_get_nthreads | |
2799 | * | |
2800 | * Return the number of threads for the process | |
2801 | */ | |
c906108c | 2802 | |
c3f6f71d JM |
2803 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
2804 | /* | |
2805 | * OSF version | |
2806 | */ | |
2807 | int | |
2808 | proc_get_nthreads (pi) | |
2809 | procinfo *pi; | |
2810 | { | |
2811 | int nthreads = 0; | |
c906108c | 2812 | |
c3f6f71d JM |
2813 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2814 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2815 | |
c3f6f71d | 2816 | return nthreads; |
c906108c SS |
2817 | } |
2818 | ||
c3f6f71d JM |
2819 | #else |
2820 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2821 | /* | |
2822 | * Solaris and Unixware version | |
2823 | */ | |
2824 | int | |
2825 | proc_get_nthreads (pi) | |
2826 | procinfo *pi; | |
c906108c | 2827 | { |
c3f6f71d JM |
2828 | if (!pi->status_valid) |
2829 | if (!proc_get_status (pi)) | |
2830 | return 0; | |
c5aa993b | 2831 | |
c3f6f71d JM |
2832 | /* |
2833 | * NEW_PROC_API: only works for the process procinfo, | |
2834 | * because the LWP procinfos do not get prstatus filled in. | |
2835 | */ | |
2836 | #ifdef NEW_PROC_API | |
2837 | if (pi->tid != 0) /* find the parent process procinfo */ | |
2838 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 2839 | #endif |
c3f6f71d | 2840 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2841 | } |
2842 | ||
c3f6f71d JM |
2843 | #else |
2844 | /* | |
2845 | * Default version | |
2846 | */ | |
2847 | int | |
2848 | proc_get_nthreads (pi) | |
2849 | procinfo *pi; | |
c906108c | 2850 | { |
c3f6f71d JM |
2851 | return 0; |
2852 | } | |
2853 | #endif | |
2854 | #endif | |
2855 | ||
2856 | /* | |
2857 | * Function: proc_get_current_thread (LWP version) | |
2858 | * | |
2859 | * Return the ID of the thread that had an event of interest. | |
2860 | * (ie. the one that hit a breakpoint or other traced event). | |
2861 | * All other things being equal, this should be the ID of a | |
2862 | * thread that is currently executing. | |
2863 | */ | |
2864 | ||
2865 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2866 | /* | |
2867 | * Solaris and Unixware version | |
2868 | */ | |
2869 | int | |
2870 | proc_get_current_thread (pi) | |
2871 | procinfo *pi; | |
2872 | { | |
2873 | /* | |
2874 | * Note: this should be applied to the root procinfo for the process, | |
2875 | * not to the procinfo for an LWP. If applied to the procinfo for | |
2876 | * an LWP, it will simply return that LWP's ID. In that case, | |
2877 | * find the parent process procinfo. | |
2878 | */ | |
2879 | ||
2880 | if (pi->tid != 0) | |
2881 | pi = find_procinfo_or_die (pi->pid, 0); | |
2882 | ||
2883 | if (!pi->status_valid) | |
2884 | if (!proc_get_status (pi)) | |
2885 | return 0; | |
2886 | ||
2887 | #ifdef NEW_PROC_API | |
2888 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2889 | #else |
c3f6f71d | 2890 | return pi->prstatus.pr_who; |
c906108c | 2891 | #endif |
c3f6f71d | 2892 | } |
c906108c | 2893 | |
c3f6f71d JM |
2894 | #else |
2895 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
2896 | /* | |
2897 | * OSF version | |
2898 | */ | |
2899 | int | |
2900 | proc_get_current_thread (pi) | |
2901 | procinfo *pi; | |
2902 | { | |
2903 | #if 0 /* FIXME: not ready for prime time? */ | |
2904 | return pi->prstatus.pr_tid; | |
2905 | #else | |
2906 | return 0; | |
2907 | #endif | |
c906108c SS |
2908 | } |
2909 | ||
c3f6f71d JM |
2910 | #else |
2911 | /* | |
2912 | * Default version | |
2913 | */ | |
2914 | int | |
2915 | proc_get_current_thread (pi) | |
2916 | procinfo *pi; | |
c906108c | 2917 | { |
c3f6f71d JM |
2918 | return 0; |
2919 | } | |
2920 | ||
2921 | #endif | |
2922 | #endif | |
c906108c | 2923 | |
c3f6f71d JM |
2924 | /* |
2925 | * Function: proc_update_threads | |
2926 | * | |
2927 | * Discover the IDs of all the threads within the process, and | |
2928 | * create a procinfo for each of them (chained to the parent). | |
2929 | * | |
2930 | * This unfortunately requires a different method on every OS. | |
2931 | * | |
2932 | * Return: non-zero for success, zero for failure. | |
2933 | */ | |
c906108c | 2934 | |
c3f6f71d JM |
2935 | int |
2936 | proc_delete_dead_threads (parent, thread, ignore) | |
2937 | procinfo *parent; | |
2938 | procinfo *thread; | |
2939 | void *ignore; | |
2940 | { | |
2941 | if (thread && parent) /* sanity */ | |
c906108c | 2942 | { |
c3f6f71d JM |
2943 | thread->status_valid = 0; |
2944 | if (!proc_get_status (thread)) | |
2945 | destroy_one_procinfo (&parent->thread_list, thread); | |
2946 | } | |
2947 | return 0; /* keep iterating */ | |
2948 | } | |
c5aa993b | 2949 | |
c3f6f71d JM |
2950 | #if defined (PIOCLSTATUS) |
2951 | /* | |
2952 | * Solaris 2.5 (ioctl) version | |
2953 | */ | |
2954 | int | |
2955 | proc_update_threads (pi) | |
2956 | procinfo *pi; | |
2957 | { | |
2958 | gdb_prstatus_t *prstatus; | |
2959 | struct cleanup *old_chain = NULL; | |
2960 | procinfo *thread; | |
2961 | int nlwp, i; | |
2962 | ||
2963 | /* | |
2964 | * We should never have to apply this operation to any procinfo | |
2965 | * except the one for the main process. If that ever changes | |
2966 | * for any reason, then take out the following clause and | |
2967 | * replace it with one that makes sure the ctl_fd is open. | |
2968 | */ | |
2969 | ||
2970 | if (pi->tid != 0) | |
2971 | pi = find_procinfo_or_die (pi->pid, 0); | |
2972 | ||
2973 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2974 | ||
2975 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2976 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2977 | ||
2978 | if ((prstatus = (gdb_prstatus_t *) | |
2979 | malloc (sizeof (gdb_prstatus_t) * (nlwp + 1))) == 0) | |
2980 | perror_with_name ("procfs: malloc failed in update_threads"); | |
2981 | ||
2982 | old_chain = make_cleanup (free, prstatus); | |
2983 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) | |
2984 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2985 | ||
2986 | /* Skip element zero, which represents the process as a whole. */ | |
2987 | for (i = 1; i < nlwp + 1; i++) | |
2988 | { | |
2989 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2990 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2991 | |
c3f6f71d JM |
2992 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2993 | thread->status_valid = 1; | |
2994 | } | |
2995 | pi->threads_valid = 1; | |
2996 | do_cleanups (old_chain); | |
2997 | return 1; | |
2998 | } | |
2999 | #else | |
3000 | #ifdef NEW_PROC_API | |
3001 | /* | |
3002 | * Unixware and Solaris 6 (and later) version | |
3003 | */ | |
004527cb AC |
3004 | static void |
3005 | do_closedir_cleanup (void *dir) | |
3006 | { | |
3007 | closedir (dir); | |
3008 | } | |
3009 | ||
c3f6f71d JM |
3010 | int |
3011 | proc_update_threads (pi) | |
3012 | procinfo *pi; | |
3013 | { | |
3014 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3015 | struct dirent *direntry; | |
3016 | struct cleanup *old_chain = NULL; | |
3017 | procinfo *thread; | |
3018 | DIR *dirp; | |
3019 | int lwpid; | |
3020 | ||
3021 | /* | |
3022 | * We should never have to apply this operation to any procinfo | |
3023 | * except the one for the main process. If that ever changes | |
3024 | * for any reason, then take out the following clause and | |
3025 | * replace it with one that makes sure the ctl_fd is open. | |
3026 | */ | |
3027 | ||
3028 | if (pi->tid != 0) | |
3029 | pi = find_procinfo_or_die (pi->pid, 0); | |
3030 | ||
3031 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3032 | ||
3033 | /* | |
3034 | * Unixware | |
3035 | * | |
3036 | * Note: this brute-force method is the only way I know of | |
3037 | * to accomplish this task on Unixware. This method will | |
3038 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3039 | * and more elegant way to do this on Solaris, but the margins | |
3040 | * of this manuscript are too small to write it here... ;-) | |
3041 | */ | |
3042 | ||
3043 | strcpy (pathname, pi->pathname); | |
3044 | strcat (pathname, "/lwp"); | |
3045 | if ((dirp = opendir (pathname)) == NULL) | |
3046 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3047 | ||
004527cb | 3048 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3049 | while ((direntry = readdir (dirp)) != NULL) |
3050 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3051 | { | |
3052 | lwpid = atoi (&direntry->d_name[0]); | |
3053 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3054 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3055 | } | |
3056 | pi->threads_valid = 1; | |
3057 | do_cleanups (old_chain); | |
3058 | return 1; | |
3059 | } | |
3060 | #else | |
3061 | #ifdef PIOCTLIST | |
3062 | /* | |
3063 | * OSF version | |
3064 | */ | |
3065 | int | |
3066 | proc_update_threads (pi) | |
3067 | procinfo *pi; | |
3068 | { | |
3069 | int nthreads, i; | |
3070 | tid_t *threads; | |
3071 | ||
3072 | /* | |
3073 | * We should never have to apply this operation to any procinfo | |
3074 | * except the one for the main process. If that ever changes | |
3075 | * for any reason, then take out the following clause and | |
3076 | * replace it with one that makes sure the ctl_fd is open. | |
3077 | */ | |
3078 | ||
3079 | if (pi->tid != 0) | |
3080 | pi = find_procinfo_or_die (pi->pid, 0); | |
3081 | ||
3082 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3083 | ||
3084 | nthreads = proc_get_nthreads (pi); | |
3085 | if (nthreads < 2) | |
3086 | return 0; /* nothing to do for 1 or fewer threads */ | |
3087 | ||
3088 | if ((threads = malloc (nthreads * sizeof (tid_t))) == NULL) | |
3089 | proc_error (pi, "update_threads, malloc", __LINE__); | |
3090 | ||
3091 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3092 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3093 | ||
3094 | for (i = 0; i < nthreads; i++) | |
3095 | { | |
3096 | if (!find_procinfo (pi->pid, threads[i])) | |
3097 | if (!create_procinfo (pi->pid, threads[i])) | |
3098 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3099 | } |
c3f6f71d JM |
3100 | pi->threads_valid = 1; |
3101 | return 1; | |
c906108c | 3102 | } |
c3f6f71d JM |
3103 | #else |
3104 | /* | |
3105 | * Default version | |
3106 | */ | |
3107 | int | |
3108 | proc_update_threads (pi) | |
3109 | procinfo *pi; | |
3110 | { | |
3111 | return 0; | |
3112 | } | |
3113 | #endif /* OSF PIOCTLIST */ | |
3114 | #endif /* NEW_PROC_API */ | |
3115 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3116 | |
c3f6f71d JM |
3117 | /* |
3118 | * Function: proc_iterate_over_threads | |
3119 | * | |
3120 | * Description: | |
3121 | * Given a pointer to a function, call that function once | |
3122 | * for each lwp in the procinfo list, until the function | |
3123 | * returns non-zero, in which event return the value | |
3124 | * returned by the function. | |
3125 | * | |
3126 | * Note: this function does NOT call update_threads. | |
3127 | * If you want to discover new threads first, you must | |
3128 | * call that function explicitly. This function just makes | |
3129 | * a quick pass over the currently-known procinfos. | |
3130 | * | |
3131 | * Arguments: | |
3132 | * pi - parent process procinfo | |
3133 | * func - per-thread function | |
3134 | * ptr - opaque parameter for function. | |
3135 | * | |
3136 | * Return: | |
3137 | * First non-zero return value from the callee, or zero. | |
3138 | */ | |
3139 | ||
3140 | int | |
3141 | proc_iterate_over_threads (pi, func, ptr) | |
3142 | procinfo *pi; | |
507f3c78 | 3143 | int (*func) (procinfo *, procinfo *, void *); |
c3f6f71d | 3144 | void *ptr; |
c906108c | 3145 | { |
c3f6f71d JM |
3146 | procinfo *thread, *next; |
3147 | int retval = 0; | |
c906108c | 3148 | |
c3f6f71d JM |
3149 | /* |
3150 | * We should never have to apply this operation to any procinfo | |
3151 | * except the one for the main process. If that ever changes | |
3152 | * for any reason, then take out the following clause and | |
3153 | * replace it with one that makes sure the ctl_fd is open. | |
3154 | */ | |
3155 | ||
3156 | if (pi->tid != 0) | |
3157 | pi = find_procinfo_or_die (pi->pid, 0); | |
3158 | ||
3159 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3160 | { |
c3f6f71d JM |
3161 | next = thread->next; /* in case thread is destroyed */ |
3162 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3163 | break; | |
c906108c | 3164 | } |
c3f6f71d JM |
3165 | |
3166 | return retval; | |
c906108c SS |
3167 | } |
3168 | ||
c3f6f71d JM |
3169 | /* =================== END, Thread "MODULE" =================== */ |
3170 | ||
3171 | /* =================== END, /proc "MODULE" =================== */ | |
3172 | ||
3173 | /* =================== GDB "MODULE" =================== */ | |
3174 | ||
3175 | /* | |
3176 | * Here are all of the gdb target vector functions and their friends. | |
3177 | */ | |
3178 | ||
a14ed312 KB |
3179 | static int do_attach (int pid); |
3180 | static void do_detach (int signo); | |
3181 | static int register_gdb_signals (procinfo *, sigset_t *); | |
c3f6f71d JM |
3182 | |
3183 | /* | |
3184 | * Function: procfs_debug_inferior | |
3185 | * | |
3186 | * Sets up the inferior to be debugged. | |
3187 | * Registers to trace signals, hardware faults, and syscalls. | |
3188 | * Note: does not set RLC flag: caller may want to customize that. | |
3189 | * | |
3190 | * Returns: zero for success (note! unlike most functions in this module) | |
3191 | * On failure, returns the LINE NUMBER where it failed! | |
3192 | */ | |
3193 | ||
3194 | static int | |
3195 | procfs_debug_inferior (pi) | |
3196 | procinfo *pi; | |
c906108c | 3197 | { |
c3f6f71d JM |
3198 | fltset_t traced_faults; |
3199 | sigset_t traced_signals; | |
3200 | sysset_t traced_syscall_entries; | |
3201 | sysset_t traced_syscall_exits; | |
c906108c | 3202 | |
c3f6f71d JM |
3203 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3204 | /* On some systems (OSF), we don't trace hardware faults. | |
3205 | Apparently it's enough that we catch them as signals. | |
3206 | Wonder why we don't just do that in general? */ | |
3207 | premptyset (&traced_faults); /* don't trace faults. */ | |
3208 | #else | |
3209 | /* Register to trace hardware faults in the child. */ | |
3210 | prfillset (&traced_faults); /* trace all faults... */ | |
3211 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3212 | #endif | |
3213 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3214 | return __LINE__; | |
c906108c | 3215 | |
c3f6f71d JM |
3216 | /* Register to trace selected signals in the child. */ |
3217 | premptyset (&traced_signals); | |
3218 | if (!register_gdb_signals (pi, &traced_signals)) | |
3219 | return __LINE__; | |
3220 | ||
3221 | /* Register to trace the 'exit' system call (on entry). */ | |
3222 | premptyset (&traced_syscall_entries); | |
3223 | praddset (&traced_syscall_entries, SYS_exit); | |
3224 | #ifdef SYS_lwpexit | |
3225 | praddset (&traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ | |
3226 | #endif | |
3227 | #ifdef SYS_lwp_exit | |
3228 | praddset (&traced_syscall_entries, SYS_lwp_exit); | |
c906108c SS |
3229 | #endif |
3230 | ||
c3f6f71d JM |
3231 | if (!proc_set_traced_sysentry (pi, &traced_syscall_entries)) |
3232 | return __LINE__; | |
3233 | ||
3234 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3235 | /* OSF method for tracing exec syscalls. Quoting: | |
3236 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3237 | exits from exec system calls because of the user level loader. */ | |
3238 | /* FIXME: make nice and maybe move into an access function. */ | |
3239 | { | |
3240 | int prfs_flags; | |
3241 | ||
3242 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3243 | return __LINE__; | |
3244 | ||
3245 | prfs_flags |= PRFS_STOPEXEC; | |
3246 | ||
3247 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3248 | return __LINE__; | |
3249 | } | |
3250 | #else /* not PRFS_STOPEXEC */ | |
3251 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3252 | /* GW: Rationale... | |
3253 | Not all systems with /proc have all the exec* syscalls with the same | |
3254 | names. On the SGI, for example, there is no SYS_exec, but there | |
3255 | *is* a SYS_execv. So, we try to account for that. */ | |
3256 | ||
3257 | premptyset (&traced_syscall_exits); | |
3258 | #ifdef SYS_exec | |
3259 | praddset (&traced_syscall_exits, SYS_exec); | |
3260 | #endif | |
3261 | #ifdef SYS_execve | |
3262 | praddset (&traced_syscall_exits, SYS_execve); | |
3263 | #endif | |
3264 | #ifdef SYS_execv | |
3265 | praddset (&traced_syscall_exits, SYS_execv); | |
3266 | #endif | |
c5aa993b | 3267 | |
c3f6f71d JM |
3268 | #ifdef SYS_lwpcreate |
3269 | praddset (&traced_syscall_exits, SYS_lwpcreate); | |
3270 | praddset (&traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3271 | #endif |
c5aa993b | 3272 | |
c3f6f71d JM |
3273 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
3274 | praddset (&traced_syscall_exits, SYS_lwp_create); | |
3275 | praddset (&traced_syscall_exits, SYS_lwp_exit); | |
3276 | #endif | |
c5aa993b | 3277 | |
c906108c | 3278 | |
c3f6f71d JM |
3279 | if (!proc_set_traced_sysexit (pi, &traced_syscall_exits)) |
3280 | return __LINE__; | |
3281 | ||
3282 | #endif /* PRFS_STOPEXEC */ | |
3283 | return 0; | |
c906108c SS |
3284 | } |
3285 | ||
c3f6f71d JM |
3286 | static void |
3287 | procfs_attach (args, from_tty) | |
3288 | char *args; | |
3289 | int from_tty; | |
c906108c | 3290 | { |
c3f6f71d JM |
3291 | char *exec_file; |
3292 | int pid; | |
3293 | ||
3294 | if (!args) | |
3295 | error_no_arg ("process-id to attach"); | |
3296 | ||
3297 | pid = atoi (args); | |
3298 | if (pid == getpid ()) | |
3299 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3300 | |
c3f6f71d | 3301 | if (from_tty) |
c906108c | 3302 | { |
c3f6f71d JM |
3303 | exec_file = get_exec_file (0); |
3304 | ||
3305 | if (exec_file) | |
3306 | printf_filtered ("Attaching to program `%s', %s\n", | |
3307 | exec_file, target_pid_to_str (pid)); | |
3308 | else | |
3309 | printf_filtered ("Attaching to %s\n", target_pid_to_str (pid)); | |
3310 | ||
3311 | fflush (stdout); | |
c906108c | 3312 | } |
c3f6f71d JM |
3313 | inferior_pid = do_attach (pid); |
3314 | push_target (&procfs_ops); | |
3315 | } | |
3316 | ||
3317 | static void | |
3318 | procfs_detach (args, from_tty) | |
3319 | char *args; | |
3320 | int from_tty; | |
3321 | { | |
3322 | char *exec_file; | |
3323 | int signo = 0; | |
3324 | ||
3325 | if (from_tty) | |
c906108c | 3326 | { |
c3f6f71d JM |
3327 | exec_file = get_exec_file (0); |
3328 | if (exec_file == 0) | |
3329 | exec_file = ""; | |
3330 | printf_filtered ("Detaching from program: %s %s\n", | |
3331 | exec_file, target_pid_to_str (inferior_pid)); | |
3332 | fflush (stdout); | |
c906108c | 3333 | } |
c3f6f71d JM |
3334 | if (args) |
3335 | signo = atoi (args); | |
3336 | ||
3337 | do_detach (signo); | |
3338 | inferior_pid = 0; | |
3339 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ | |
c906108c SS |
3340 | } |
3341 | ||
c3f6f71d JM |
3342 | static int |
3343 | do_attach (pid) | |
3344 | int pid; | |
c906108c | 3345 | { |
c3f6f71d JM |
3346 | procinfo *pi; |
3347 | int fail; | |
3348 | ||
3349 | if ((pi = create_procinfo (pid, 0)) == NULL) | |
3350 | perror ("procfs: out of memory in 'attach'"); | |
3351 | ||
3352 | if (!open_procinfo_files (pi, FD_CTL)) | |
3353 | { | |
3354 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3355 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
3356 | pid); | |
3357 | dead_procinfo (pi, errmsg, NOKILL); | |
3358 | } | |
c906108c | 3359 | |
c3f6f71d JM |
3360 | /* Stop the process (if it isn't already stopped). */ |
3361 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3362 | { |
c3f6f71d JM |
3363 | pi->was_stopped = 1; |
3364 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3365 | } |
3366 | else | |
3367 | { | |
c3f6f71d JM |
3368 | pi->was_stopped = 0; |
3369 | /* Set the process to run again when we close it. */ | |
3370 | if (!proc_set_run_on_last_close (pi)) | |
3371 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3372 | ||
3373 | /* Now stop the process. */ | |
3374 | if (!proc_stop_process (pi)) | |
3375 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3376 | pi->ignore_next_sigstop = 1; | |
c906108c | 3377 | } |
c3f6f71d JM |
3378 | /* Save some of the /proc state to be restored if we detach. */ |
3379 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3380 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3381 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3382 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
3383 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
3384 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", | |
3385 | NOKILL); | |
3386 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
3387 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", | |
3388 | NOKILL); | |
3389 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3390 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3391 | ||
3392 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3393 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3394 | ||
3395 | /* Let GDB know that the inferior was attached. */ | |
3396 | attach_flag = 1; | |
3397 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3398 | } |
3399 | ||
3400 | static void | |
c3f6f71d JM |
3401 | do_detach (signo) |
3402 | int signo; | |
c906108c | 3403 | { |
c3f6f71d | 3404 | procinfo *pi; |
c906108c | 3405 | |
c3f6f71d JM |
3406 | /* Find procinfo for the main process */ |
3407 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); /* FIXME: threads */ | |
3408 | if (signo) | |
3409 | if (!proc_set_current_signal (pi, signo)) | |
3410 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3411 | |
c3f6f71d JM |
3412 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3413 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3414 | |
c3f6f71d JM |
3415 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3416 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3417 | ||
3418 | if (!proc_set_traced_sysentry (pi, &pi->saved_entryset)) | |
3419 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); | |
3420 | ||
3421 | if (!proc_set_traced_sysexit (pi, &pi->saved_exitset)) | |
3422 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); | |
3423 | ||
3424 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3425 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3426 | ||
3427 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3428 | if (signo || !(pi->was_stopped) || | |
3429 | query ("Was stopped when attached, make it runnable again? ")) | |
3430 | { | |
3431 | /* Clear any pending signal. */ | |
3432 | if (!proc_clear_current_fault (pi)) | |
3433 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3434 | ||
3435 | if (!proc_set_run_on_last_close (pi)) | |
3436 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3437 | } | |
3438 | ||
3439 | attach_flag = 0; | |
3440 | destroy_procinfo (pi); | |
c906108c SS |
3441 | } |
3442 | ||
c3f6f71d JM |
3443 | /* |
3444 | * fetch_registers | |
3445 | * | |
3446 | * Since the /proc interface cannot give us individual registers, | |
3447 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3448 | * This results in the possibility that we will do unnecessarily many | |
3449 | * fetches, since we may be called repeatedly for individual registers. | |
3450 | * So we cache the results, and mark the cache invalid when the process | |
3451 | * is resumed. | |
3452 | */ | |
3453 | ||
c906108c | 3454 | static void |
c3f6f71d JM |
3455 | procfs_fetch_registers (regno) |
3456 | int regno; | |
c906108c | 3457 | { |
c3f6f71d JM |
3458 | gdb_fpregset_t *fpregs; |
3459 | gdb_gregset_t *gregs; | |
3460 | procinfo *pi; | |
3461 | int pid; | |
3462 | int tid; | |
c906108c | 3463 | |
c3f6f71d JM |
3464 | pid = PIDGET (inferior_pid); |
3465 | tid = TIDGET (inferior_pid); | |
3466 | ||
3467 | /* First look up procinfo for the main process. */ | |
3468 | pi = find_procinfo_or_die (pid, 0); | |
3469 | ||
3470 | /* If the event thread is not the same as GDB's requested thread | |
3471 | (ie. inferior_pid), then look up procinfo for the requested | |
3472 | thread. */ | |
3473 | if ((tid != 0) && | |
3474 | (tid != proc_get_current_thread (pi))) | |
3475 | pi = find_procinfo_or_die (pid, tid); | |
3476 | ||
3477 | if (pi == NULL) | |
3478 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
3479 | target_pid_to_str (inferior_pid)); | |
3480 | ||
3481 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3482 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3483 | ||
3484 | supply_gregset (gregs); | |
3485 | ||
60054393 MS |
3486 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3487 | { | |
3488 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3489 | regno == PC_REGNUM || | |
3490 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3491 | regno == FP_REGNUM || | |
3492 | regno == SP_REGNUM) | |
3493 | return; /* not a floating point register */ | |
c5aa993b | 3494 | |
60054393 MS |
3495 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3496 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3497 | |
60054393 MS |
3498 | supply_fpregset (fpregs); |
3499 | } | |
c906108c SS |
3500 | } |
3501 | ||
c3f6f71d JM |
3502 | /* Get ready to modify the registers array. On machines which store |
3503 | individual registers, this doesn't need to do anything. On | |
3504 | machines which store all the registers in one fell swoop, such as | |
3505 | /proc, this makes sure that registers contains all the registers | |
3506 | from the program being debugged. */ | |
3507 | ||
c906108c | 3508 | static void |
c3f6f71d | 3509 | procfs_prepare_to_store () |
c906108c | 3510 | { |
c3f6f71d JM |
3511 | #ifdef CHILD_PREPARE_TO_STORE |
3512 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3513 | #endif |
c906108c SS |
3514 | } |
3515 | ||
3516 | /* | |
c3f6f71d JM |
3517 | * store_registers |
3518 | * | |
3519 | * Since the /proc interface will not read individual registers, | |
3520 | * we will cache these requests until the process is resumed, and | |
3521 | * only then write them back to the inferior process. | |
3522 | * | |
3523 | * FIXME: is that a really bad idea? Have to think about cases | |
3524 | * where writing one register might affect the value of others, etc. | |
3525 | */ | |
c906108c | 3526 | |
c3f6f71d JM |
3527 | static void |
3528 | procfs_store_registers (regno) | |
3529 | int regno; | |
3530 | { | |
3531 | gdb_fpregset_t *fpregs; | |
3532 | gdb_gregset_t *gregs; | |
3533 | procinfo *pi; | |
3534 | int pid; | |
3535 | int tid; | |
c906108c | 3536 | |
c3f6f71d JM |
3537 | pid = PIDGET (inferior_pid); |
3538 | tid = TIDGET (inferior_pid); | |
c906108c | 3539 | |
c3f6f71d JM |
3540 | /* First find procinfo for main process */ |
3541 | pi = find_procinfo_or_die (pid, 0); | |
3542 | ||
3543 | /* If current lwp for process is not the same as requested thread | |
3544 | (ie. inferior_pid), then find procinfo for the requested thread. */ | |
3545 | ||
3546 | if ((tid != 0) && | |
3547 | (tid != proc_get_current_thread (pi))) | |
3548 | pi = find_procinfo_or_die (pid, tid); | |
3549 | ||
3550 | if (pi == NULL) | |
3551 | error ("procfs: store_registers: failed to find procinfo for %s", | |
3552 | target_pid_to_str (inferior_pid)); | |
c906108c | 3553 | |
c3f6f71d JM |
3554 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3555 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3556 | |
c3f6f71d JM |
3557 | fill_gregset (gregs, regno); |
3558 | if (!proc_set_gregs (pi)) | |
3559 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3560 | |
60054393 MS |
3561 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3562 | { | |
3563 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3564 | regno == PC_REGNUM || | |
3565 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3566 | regno == FP_REGNUM || | |
3567 | regno == SP_REGNUM) | |
3568 | return; /* not a floating point register */ | |
3569 | ||
3570 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3571 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3572 | ||
3573 | fill_fpregset (fpregs, regno); | |
3574 | if (!proc_set_fpregs (pi)) | |
3575 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3576 | } | |
c3f6f71d | 3577 | } |
c906108c | 3578 | |
c3f6f71d JM |
3579 | /* |
3580 | * Function: target_wait | |
3581 | * | |
3582 | * Retrieve the next stop event from the child process. | |
3583 | * If child has not stopped yet, wait for it to stop. | |
3584 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3585 | * into gdb internal event codes. | |
3586 | * | |
3587 | * Return: id of process (and possibly thread) that incurred the event. | |
3588 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3589 | */ |
3590 | ||
c3f6f71d JM |
3591 | static int |
3592 | procfs_wait (pid, status) | |
3593 | int pid; | |
3594 | struct target_waitstatus *status; | |
c906108c | 3595 | { |
c3f6f71d JM |
3596 | /* First cut: loosely based on original version 2.1 */ |
3597 | procinfo *pi; | |
3598 | int temp, wstat; | |
3599 | int retval; | |
3600 | int why, what, flags; | |
3601 | int retry = 0; | |
c906108c | 3602 | |
c3f6f71d | 3603 | wait_again: |
c906108c | 3604 | |
c3f6f71d JM |
3605 | retry++; |
3606 | wstat = 0; | |
3607 | retval = -1; | |
c906108c | 3608 | |
c3f6f71d JM |
3609 | /* Find procinfo for main process */ |
3610 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
3611 | if (pi) | |
c906108c | 3612 | { |
c3f6f71d JM |
3613 | /* We must assume that the status is stale now... */ |
3614 | pi->status_valid = 0; | |
3615 | pi->gregs_valid = 0; | |
3616 | pi->fpregs_valid = 0; | |
3617 | ||
3618 | #if 0 /* just try this out... */ | |
3619 | flags = proc_flags (pi); | |
3620 | why = proc_why (pi); | |
3621 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3622 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3623 | #endif | |
3624 | /* If child is not stopped, wait for it to stop. */ | |
3625 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3626 | !proc_wait_for_stop (pi)) | |
c906108c | 3627 | { |
c3f6f71d JM |
3628 | /* wait_for_stop failed: has the child terminated? */ |
3629 | if (errno == ENOENT) | |
c906108c | 3630 | { |
c3f6f71d JM |
3631 | /* /proc file not found; presumably child has terminated. */ |
3632 | retval = wait (&wstat); /* "wait" for the child's exit */ | |
3633 | ||
3634 | if (retval != PIDGET (inferior_pid)) /* wrong child? */ | |
3635 | error ("procfs: couldn't stop process %d: wait returned %d\n", | |
3636 | inferior_pid, retval); | |
3637 | /* FIXME: might I not just use waitpid? | |
3638 | Or try find_procinfo to see if I know about this child? */ | |
c906108c | 3639 | } |
c3f6f71d | 3640 | else |
c906108c | 3641 | { |
c3f6f71d JM |
3642 | /* Unknown error from wait_for_stop. */ |
3643 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3644 | } |
c3f6f71d JM |
3645 | } |
3646 | else | |
3647 | { | |
3648 | /* This long block is reached if either: | |
3649 | a) the child was already stopped, or | |
3650 | b) we successfully waited for the child with wait_for_stop. | |
3651 | This block will analyze the /proc status, and translate it | |
3652 | into a waitstatus for GDB. | |
3653 | ||
3654 | If we actually had to call wait because the /proc file | |
3655 | is gone (child terminated), then we skip this block, | |
3656 | because we already have a waitstatus. */ | |
3657 | ||
3658 | flags = proc_flags (pi); | |
3659 | why = proc_why (pi); | |
3660 | what = proc_what (pi); | |
3661 | ||
c3f6f71d | 3662 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3663 | { |
c3f6f71d JM |
3664 | #ifdef PR_ASYNC |
3665 | /* If it's running async (for single_thread control), | |
3666 | set it back to normal again. */ | |
3667 | if (flags & PR_ASYNC) | |
3668 | if (!proc_unset_async (pi)) | |
3669 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3670 | #endif | |
3671 | ||
3672 | if (info_verbose) | |
3673 | proc_prettyprint_why (why, what, 1); | |
3674 | ||
3675 | /* The 'pid' we will return to GDB is composed of | |
3676 | the process ID plus the lwp ID. */ | |
3677 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3678 | ||
3679 | switch (why) { | |
3680 | case PR_SIGNALLED: | |
3681 | wstat = (what << 8) | 0177; | |
3682 | break; | |
3683 | case PR_SYSENTRY: | |
3684 | switch (what) { | |
3685 | #ifdef SYS_lwp_exit | |
3686 | case SYS_lwp_exit: | |
3687 | #endif | |
3688 | #ifdef SYS_lwpexit | |
3689 | case SYS_lwpexit: | |
3690 | #endif | |
3691 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3692 | printf_filtered ("[%s exited]\n", | |
3693 | target_pid_to_str (retval)); | |
3694 | delete_thread (retval); | |
3695 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3696 | return retval; | |
3697 | #endif /* _lwp_exit */ | |
3698 | ||
3699 | case SYS_exit: | |
3700 | /* Handle SYS_exit call only */ | |
3701 | /* Stopped at entry to SYS_exit. | |
3702 | Make it runnable, resume it, then use | |
3703 | the wait system call to get its exit code. | |
3704 | Proc_run_process always clears the current | |
3705 | fault and signal. | |
3706 | Then return its exit status. */ | |
3707 | pi->status_valid = 0; | |
3708 | wstat = 0; | |
3709 | /* FIXME: what we should do is return | |
3710 | TARGET_WAITKIND_SPURIOUS. */ | |
3711 | if (!proc_run_process (pi, 0, 0)) | |
3712 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3713 | if (attach_flag) | |
3714 | { | |
3715 | /* Don't call wait: simulate waiting for exit, | |
3716 | return a "success" exit code. Bogus: what if | |
3717 | it returns something else? */ | |
3718 | wstat = 0; | |
02d5252f | 3719 | retval = inferior_pid; /* ? ? ? */ |
c3f6f71d JM |
3720 | } |
3721 | else | |
3722 | { | |
3723 | int temp = wait (&wstat); | |
3724 | ||
3725 | /* FIXME: shouldn't I make sure I get the right | |
3726 | event from the right process? If (for | |
3727 | instance) I have killed an earlier inferior | |
3728 | process but failed to clean up after it | |
3729 | somehow, I could get its termination event | |
3730 | here. */ | |
3731 | ||
3732 | /* If wait returns -1, that's what we return to GDB. */ | |
3733 | if (temp < 0) | |
3734 | retval = temp; | |
3735 | } | |
3736 | break; | |
3737 | default: | |
3738 | printf_filtered ("procfs: trapped on entry to "); | |
3739 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3740 | printf_filtered ("\n"); | |
3741 | #ifndef PIOCSSPCACT | |
3742 | { | |
3743 | long i, nsysargs, *sysargs; | |
3744 | ||
3745 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3746 | (sysargs = proc_sysargs (pi)) != NULL) | |
3747 | { | |
0fda6bd2 | 3748 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3749 | for (i = 0; i < nsysargs; i++) |
02d5252f | 3750 | printf_filtered ("#%ld: 0x%08lx\n", |
c3f6f71d JM |
3751 | i, sysargs[i]); |
3752 | } | |
3753 | ||
3754 | } | |
3755 | #endif | |
3756 | if (status) | |
3757 | { | |
3758 | /* How to exit gracefully, returning "unknown event" */ | |
3759 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3760 | return inferior_pid; | |
3761 | } | |
3762 | else | |
3763 | { | |
3764 | /* How to keep going without returning to wfi: */ | |
3765 | target_resume (pid, 0, TARGET_SIGNAL_0); | |
3766 | goto wait_again; | |
3767 | } | |
3768 | break; | |
3769 | } | |
3770 | break; | |
3771 | case PR_SYSEXIT: | |
3772 | switch (what) { | |
3773 | #ifdef SYS_exec | |
3774 | case SYS_exec: | |
3775 | #endif | |
3776 | #ifdef SYS_execv | |
3777 | case SYS_execv: | |
3778 | #endif | |
3779 | #ifdef SYS_execve | |
3780 | case SYS_execve: | |
3781 | #endif | |
3782 | /* Hopefully this is our own "fork-child" execing | |
3783 | the real child. Hoax this event into a trap, and | |
3784 | GDB will see the child about to execute its start | |
3785 | address. */ | |
3786 | wstat = (SIGTRAP << 8) | 0177; | |
3787 | break; | |
3788 | #ifdef SYS_lwp_create | |
3789 | case SYS_lwp_create: | |
3790 | #endif | |
3791 | #ifdef SYS_lwpcreate | |
3792 | case SYS_lwpcreate: | |
3793 | #endif | |
3794 | #if defined(SYS_lwp_create) || defined(SYS_lwpcreate) | |
3795 | /* | |
3796 | * This syscall is somewhat like fork/exec. | |
3797 | * We will get the event twice: once for the parent LWP, | |
3798 | * and once for the child. We should already know about | |
3799 | * the parent LWP, but the child will be new to us. So, | |
3800 | * whenever we get this event, if it represents a new | |
3801 | * thread, simply add the thread to the list. | |
3802 | */ | |
3803 | ||
3804 | /* If not in procinfo list, add it. */ | |
3805 | temp = proc_get_current_thread (pi); | |
3806 | if (!find_procinfo (pi->pid, temp)) | |
3807 | create_procinfo (pi->pid, temp); | |
3808 | ||
3809 | temp = MERGEPID (pi->pid, temp); | |
3810 | /* If not in GDB's thread list, add it. */ | |
3811 | if (!in_thread_list (temp)) | |
3812 | { | |
3813 | printf_filtered ("[New %s]\n", target_pid_to_str (temp)); | |
3814 | add_thread (temp); | |
3815 | } | |
3816 | /* Return to WFI, but tell it to immediately resume. */ | |
3817 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3818 | return inferior_pid; | |
3819 | #endif /* _lwp_create */ | |
c906108c | 3820 | |
c3f6f71d JM |
3821 | #ifdef SYS_lwp_exit |
3822 | case SYS_lwp_exit: | |
3823 | #endif | |
3824 | #ifdef SYS_lwpexit | |
3825 | case SYS_lwpexit: | |
3826 | #endif | |
3827 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3828 | printf_filtered ("[%s exited]\n", | |
3829 | target_pid_to_str (retval)); | |
3830 | delete_thread (retval); | |
3831 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3832 | return retval; | |
3833 | #endif /* _lwp_exit */ | |
3834 | ||
3835 | #ifdef SYS_sproc | |
3836 | case SYS_sproc: | |
3837 | /* Nothing to do here for now. The old procfs | |
3838 | seemed to use this event to handle threads on | |
3839 | older (non-LWP) systems, where I'm assuming that | |
3840 | threads were actually separate processes. Irix, | |
3841 | maybe? Anyway, low priority for now. */ | |
3842 | #endif | |
3843 | #ifdef SYS_fork | |
3844 | case SYS_fork: | |
3845 | /* FIXME: do we need to handle this? Investigate. */ | |
3846 | #endif | |
3847 | #ifdef SYS_vfork | |
3848 | case SYS_vfork: | |
3849 | /* FIXME: see above. */ | |
3850 | #endif | |
3851 | default: | |
3852 | printf_filtered ("procfs: trapped on exit from "); | |
3853 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3854 | printf_filtered ("\n"); | |
3855 | #ifndef PIOCSSPCACT | |
3856 | { | |
3857 | long i, nsysargs, *sysargs; | |
3858 | ||
3859 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3860 | (sysargs = proc_sysargs (pi)) != NULL) | |
3861 | { | |
0fda6bd2 | 3862 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3863 | for (i = 0; i < nsysargs; i++) |
02d5252f | 3864 | printf_filtered ("#%ld: 0x%08lx\n", |
c3f6f71d JM |
3865 | i, sysargs[i]); |
3866 | } | |
3867 | } | |
3868 | #endif | |
3869 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3870 | return inferior_pid; | |
3871 | } | |
3872 | break; | |
3873 | case PR_REQUESTED: | |
3874 | #if 0 /* FIXME */ | |
3875 | wstat = (SIGSTOP << 8) | 0177; | |
3876 | break; | |
3877 | #else | |
3878 | if (retry < 5) | |
3879 | { | |
3880 | printf_filtered ("Retry #%d:\n", retry); | |
3881 | pi->status_valid = 0; | |
3882 | goto wait_again; | |
3883 | } | |
3884 | else | |
3885 | { | |
3886 | /* If not in procinfo list, add it. */ | |
3887 | temp = proc_get_current_thread (pi); | |
3888 | if (!find_procinfo (pi->pid, temp)) | |
3889 | create_procinfo (pi->pid, temp); | |
3890 | ||
3891 | /* If not in GDB's thread list, add it. */ | |
3892 | temp = MERGEPID (pi->pid, temp); | |
3893 | if (!in_thread_list (temp)) | |
3894 | { | |
0d06e24b | 3895 | printf_filtered ("[New %s]\n", |
c3f6f71d JM |
3896 | target_pid_to_str (temp)); |
3897 | add_thread (temp); | |
3898 | } | |
3899 | ||
3900 | status->kind = TARGET_WAITKIND_STOPPED; | |
3901 | status->value.sig = 0; | |
3902 | return retval; | |
3903 | } | |
3904 | #endif | |
3905 | case PR_JOBCONTROL: | |
3906 | wstat = (what << 8) | 0177; | |
3907 | break; | |
3908 | case PR_FAULTED: | |
3909 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
3910 | #ifdef FLTWATCH | |
3911 | case FLTWATCH: | |
3912 | wstat = (SIGTRAP << 8) | 0177; | |
3913 | break; | |
3914 | #endif | |
3915 | #ifdef FLTKWATCH | |
3916 | case FLTKWATCH: | |
3917 | wstat = (SIGTRAP << 8) | 0177; | |
3918 | break; | |
3919 | #endif | |
3920 | /* FIXME: use si_signo where possible. */ | |
3921 | case FLTPRIV: | |
3922 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
3923 | case FLTILL: | |
3924 | #endif | |
3925 | wstat = (SIGILL << 8) | 0177; | |
3926 | break; | |
3927 | case FLTBPT: | |
3928 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
3929 | case FLTTRACE: | |
3930 | #endif | |
3931 | wstat = (SIGTRAP << 8) | 0177; | |
3932 | break; | |
3933 | case FLTSTACK: | |
3934 | case FLTACCESS: | |
3935 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
3936 | case FLTBOUNDS: | |
3937 | #endif | |
3938 | wstat = (SIGSEGV << 8) | 0177; | |
3939 | break; | |
3940 | case FLTIOVF: | |
3941 | case FLTIZDIV: | |
3942 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
3943 | case FLTFPE: | |
3944 | #endif | |
3945 | wstat = (SIGFPE << 8) | 0177; | |
3946 | break; | |
3947 | case FLTPAGE: /* Recoverable page fault */ | |
3948 | default: /* FIXME: use si_signo if possible for fault */ | |
3949 | retval = -1; | |
3950 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3951 | printf_filtered ("child stopped for unknown reason:\n"); | |
3952 | proc_prettyprint_why (why, what, 1); | |
3953 | error ("... giving up..."); | |
3954 | break; | |
3955 | } | |
3956 | break; /* case PR_FAULTED: */ | |
3957 | default: /* switch (why) unmatched */ | |
3958 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3959 | printf_filtered ("child stopped for unknown reason:\n"); | |
3960 | proc_prettyprint_why (why, what, 1); | |
3961 | error ("... giving up..."); | |
3962 | break; | |
3963 | } | |
3964 | /* | |
3965 | * Got this far without error: | |
3966 | * If retval isn't in the threads database, add it. | |
3967 | */ | |
3968 | if (retval > 0 && | |
3969 | retval != inferior_pid && | |
3970 | !in_thread_list (retval)) | |
c906108c | 3971 | { |
c3f6f71d JM |
3972 | /* |
3973 | * We have a new thread. | |
3974 | * We need to add it both to GDB's list and to our own. | |
3975 | * If we don't create a procinfo, resume may be unhappy | |
3976 | * later. | |
3977 | */ | |
3978 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
3979 | add_thread (retval); | |
3980 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
3981 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
3982 | ||
3983 | /* In addition, it's possible that this is the first | |
3984 | * new thread we've seen, in which case we may not | |
3985 | * have created entries for inferior_pid yet. | |
3986 | */ | |
3987 | if (TIDGET (inferior_pid) != 0) | |
3988 | { | |
3989 | if (!in_thread_list (inferior_pid)) | |
3990 | add_thread (inferior_pid); | |
3991 | if (find_procinfo (PIDGET (inferior_pid), | |
3992 | TIDGET (inferior_pid)) == NULL) | |
3993 | create_procinfo (PIDGET (inferior_pid), | |
3994 | TIDGET (inferior_pid)); | |
3995 | } | |
c906108c | 3996 | } |
c906108c | 3997 | } |
c3f6f71d | 3998 | else /* flags do not indicate STOPPED */ |
c906108c | 3999 | { |
c3f6f71d JM |
4000 | /* surely this can't happen... */ |
4001 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4002 | __LINE__); | |
4003 | proc_prettyprint_flags (flags, 1); | |
4004 | error ("procfs: ...giving up..."); | |
c906108c | 4005 | } |
c906108c | 4006 | } |
c906108c | 4007 | |
c3f6f71d JM |
4008 | if (status) |
4009 | store_waitstatus (status, wstat); | |
c906108c SS |
4010 | } |
4011 | ||
c3f6f71d JM |
4012 | return retval; |
4013 | } | |
c906108c | 4014 | |
c3f6f71d JM |
4015 | static int |
4016 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) | |
4017 | CORE_ADDR memaddr; | |
4018 | char *myaddr; | |
4019 | int len; | |
4020 | int dowrite; | |
4021 | struct target_ops *target; /* ignored */ | |
4022 | { | |
4023 | procinfo *pi; | |
4024 | int nbytes = 0; | |
c906108c | 4025 | |
c3f6f71d JM |
4026 | /* Find procinfo for main process */ |
4027 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4028 | if (pi->as_fd == 0 && | |
4029 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4030 | { |
c3f6f71d JM |
4031 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4032 | return 0; | |
c906108c | 4033 | } |
c906108c | 4034 | |
c3f6f71d | 4035 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4036 | { |
c3f6f71d | 4037 | if (dowrite) |
c906108c | 4038 | { |
c3f6f71d JM |
4039 | #ifdef NEW_PROC_API |
4040 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4041 | #else |
c3f6f71d | 4042 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4043 | #endif |
c3f6f71d | 4044 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4045 | } |
c3f6f71d | 4046 | else |
c906108c | 4047 | { |
c3f6f71d JM |
4048 | PROCFS_NOTE ("read memory: \n"); |
4049 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4050 | } |
c3f6f71d | 4051 | if (nbytes < 0) |
c906108c | 4052 | { |
c3f6f71d | 4053 | nbytes = 0; |
c906108c | 4054 | } |
c906108c | 4055 | } |
c3f6f71d | 4056 | return nbytes; |
c906108c SS |
4057 | } |
4058 | ||
4059 | /* | |
c3f6f71d JM |
4060 | * Function: invalidate_cache |
4061 | * | |
4062 | * Called by target_resume before making child runnable. | |
4063 | * Mark cached registers and status's invalid. | |
4064 | * If there are "dirty" caches that need to be written back | |
4065 | * to the child process, do that. | |
4066 | * | |
4067 | * File descriptors are also cached. | |
4068 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4069 | * However, as they are expensive to open, we don't want to throw them | |
4070 | * away indescriminately either. As a compromise, we will keep the | |
4071 | * file descriptors for the parent process, but discard any file | |
4072 | * descriptors we may have accumulated for the threads. | |
4073 | * | |
4074 | * Return value: | |
4075 | * As this function is called by iterate_over_threads, it always | |
4076 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
4077 | */ |
4078 | ||
c3f6f71d JM |
4079 | |
4080 | static int | |
4081 | invalidate_cache (parent, pi, ptr) | |
4082 | procinfo *parent; | |
4083 | procinfo *pi; | |
4084 | void *ptr; | |
c906108c | 4085 | { |
c3f6f71d JM |
4086 | /* |
4087 | * About to run the child; invalidate caches and do any other cleanup. | |
4088 | */ | |
c906108c | 4089 | |
c3f6f71d JM |
4090 | #if 0 |
4091 | if (pi->gregs_dirty) | |
4092 | if (parent == NULL || | |
4093 | proc_get_current_thread (parent) != pi->tid) | |
4094 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4095 | proc_warn (pi, "target_resume, set_gregs", | |
4096 | __LINE__); | |
60054393 MS |
4097 | if (FP0_REGNUM >= 0) |
4098 | if (pi->fpregs_dirty) | |
4099 | if (parent == NULL || | |
4100 | proc_get_current_thread (parent) != pi->tid) | |
4101 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4102 | proc_warn (pi, "target_resume, set_fpregs", | |
4103 | __LINE__); | |
c906108c | 4104 | #endif |
c906108c | 4105 | |
c3f6f71d | 4106 | if (parent != NULL) |
c906108c | 4107 | { |
c3f6f71d JM |
4108 | /* The presence of a parent indicates that this is an LWP. |
4109 | Close any file descriptors that it might have open. | |
4110 | We don't do this to the master (parent) procinfo. */ | |
4111 | ||
4112 | close_procinfo_files (pi); | |
c906108c | 4113 | } |
c3f6f71d JM |
4114 | pi->gregs_valid = 0; |
4115 | pi->fpregs_valid = 0; | |
4116 | #if 0 | |
4117 | pi->gregs_dirty = 0; | |
4118 | pi->fpregs_dirty = 0; | |
c906108c | 4119 | #endif |
c3f6f71d JM |
4120 | pi->status_valid = 0; |
4121 | pi->threads_valid = 0; | |
c906108c | 4122 | |
c3f6f71d | 4123 | return 0; |
c906108c SS |
4124 | } |
4125 | ||
0fda6bd2 | 4126 | #if 0 |
c906108c | 4127 | /* |
c3f6f71d JM |
4128 | * Function: make_signal_thread_runnable |
4129 | * | |
4130 | * A callback function for iterate_over_threads. | |
4131 | * Find the asynchronous signal thread, and make it runnable. | |
4132 | * See if that helps matters any. | |
c906108c SS |
4133 | */ |
4134 | ||
c3f6f71d JM |
4135 | static int |
4136 | make_signal_thread_runnable (process, pi, ptr) | |
4137 | procinfo *process; | |
4138 | procinfo *pi; | |
4139 | void *ptr; | |
c906108c | 4140 | { |
c3f6f71d JM |
4141 | #ifdef PR_ASLWP |
4142 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4143 | { |
c3f6f71d JM |
4144 | if (!proc_run_process (pi, 0, -1)) |
4145 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4146 | return 1; | |
c906108c | 4147 | } |
c906108c | 4148 | #endif |
c3f6f71d | 4149 | return 0; |
c906108c | 4150 | } |
0fda6bd2 | 4151 | #endif |
c906108c SS |
4152 | |
4153 | /* | |
c3f6f71d JM |
4154 | * Function: target_resume |
4155 | * | |
4156 | * Make the child process runnable. Normally we will then call | |
4157 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4158 | * | |
4159 | * Arguments: | |
4160 | * step: if true, then arrange for the child to stop again | |
4161 | * after executing a single instruction. | |
4162 | * signo: if zero, then cancel any pending signal. | |
4163 | * If non-zero, then arrange for the indicated signal | |
4164 | * to be delivered to the child when it runs. | |
4165 | * pid: if -1, then allow any child thread to run. | |
4166 | * if non-zero, then allow only the indicated thread to run. | |
4167 | ******* (not implemented yet) | |
c906108c SS |
4168 | */ |
4169 | ||
4170 | static void | |
c3f6f71d JM |
4171 | procfs_resume (pid, step, signo) |
4172 | int pid; | |
4173 | int step; | |
4174 | enum target_signal signo; | |
c906108c | 4175 | { |
c3f6f71d JM |
4176 | procinfo *pi, *thread; |
4177 | int native_signo; | |
4178 | ||
4179 | /* 2.1: | |
4180 | prrun.prflags |= PRSVADDR; | |
4181 | prrun.pr_vaddr = $PC; set resume address | |
4182 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4183 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4184 | prrun.prflags |= PRCFAULT; clear current fault. | |
4185 | ||
4186 | PRSTRACE and PRSFAULT can be done by other means | |
4187 | (proc_trace_signals, proc_trace_faults) | |
4188 | PRSVADDR is unnecessary. | |
4189 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4190 | This basically leaves PRSTEP and PRCSIG. | |
4191 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4192 | So basically PR_STEP is the sole argument that must be passed | |
4193 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4194 | ||
4195 | /* Find procinfo for main process */ | |
4196 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4197 | ||
4198 | /* First cut: ignore pid argument */ | |
4199 | errno = 0; | |
c906108c | 4200 | |
c3f6f71d JM |
4201 | /* Convert signal to host numbering. */ |
4202 | if (signo == 0 || | |
0fda6bd2 | 4203 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4204 | native_signo = 0; |
4205 | else | |
4206 | native_signo = target_signal_to_host (signo); | |
c906108c | 4207 | |
c3f6f71d | 4208 | pi->ignore_next_sigstop = 0; |
c906108c | 4209 | |
c3f6f71d JM |
4210 | /* Running the process voids all cached registers and status. */ |
4211 | /* Void the threads' caches first */ | |
4212 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4213 | /* Void the process procinfo's caches. */ | |
4214 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4215 | |
c3f6f71d | 4216 | if (pid != -1) |
c906108c | 4217 | { |
c3f6f71d JM |
4218 | /* Resume a specific thread, presumably suppressing the others. */ |
4219 | thread = find_procinfo (PIDGET (pid), TIDGET (pid)); | |
4220 | if (thread == NULL) | |
4221 | warning ("procfs: resume can't find thread %d -- resuming all.", | |
4222 | TIDGET (pid)); | |
4223 | else | |
c906108c | 4224 | { |
c3f6f71d JM |
4225 | if (thread->tid != 0) |
4226 | { | |
4227 | /* We're to resume a specific thread, and not the others. | |
4228 | * Set the child process's PR_ASYNC flag. | |
4229 | */ | |
4230 | #ifdef PR_ASYNC | |
4231 | if (!proc_set_async (pi)) | |
4232 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4233 | #endif | |
4234 | #if 0 | |
4235 | proc_iterate_over_threads (pi, | |
4236 | make_signal_thread_runnable, | |
4237 | NULL); | |
4238 | #endif | |
4239 | pi = thread; /* substitute the thread's procinfo for run */ | |
4240 | } | |
c906108c SS |
4241 | } |
4242 | } | |
c906108c | 4243 | |
c3f6f71d | 4244 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4245 | { |
c3f6f71d JM |
4246 | if (errno == EBUSY) |
4247 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4248 | else | |
4249 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4250 | } |
c3f6f71d | 4251 | } |
c906108c | 4252 | |
c3f6f71d JM |
4253 | /* |
4254 | * Function: register_gdb_signals | |
4255 | * | |
4256 | * Traverse the list of signals that GDB knows about | |
4257 | * (see "handle" command), and arrange for the target | |
4258 | * to be stopped or not, according to these settings. | |
4259 | * | |
4260 | * Returns non-zero for success, zero for failure. | |
4261 | */ | |
c906108c | 4262 | |
c3f6f71d JM |
4263 | static int |
4264 | register_gdb_signals (pi, signals) | |
4265 | procinfo *pi; | |
4266 | sigset_t *signals; | |
4267 | { | |
4268 | int signo; | |
c906108c | 4269 | |
c3f6f71d JM |
4270 | for (signo = 0; signo < NSIG; signo ++) |
4271 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4272 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4273 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4274 | prdelset (signals, signo); | |
4275 | else | |
4276 | praddset (signals, signo); | |
c906108c | 4277 | |
c3f6f71d | 4278 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4279 | } |
4280 | ||
4281 | /* | |
c3f6f71d JM |
4282 | * Function: target_notice_signals |
4283 | * | |
4284 | * Set up to trace signals in the child process. | |
4285 | */ | |
c906108c | 4286 | |
c3f6f71d JM |
4287 | static void |
4288 | procfs_notice_signals (pid) | |
4289 | int pid; | |
4290 | { | |
4291 | sigset_t signals; | |
4292 | procinfo *pi = find_procinfo_or_die (PIDGET (pid), 0); | |
c906108c | 4293 | |
c3f6f71d JM |
4294 | if (proc_get_traced_signals (pi, &signals) && |
4295 | register_gdb_signals (pi, &signals)) | |
4296 | return; | |
4297 | else | |
4298 | proc_error (pi, "notice_signals", __LINE__); | |
4299 | } | |
c906108c | 4300 | |
c3f6f71d JM |
4301 | /* |
4302 | * Function: target_files_info | |
4303 | * | |
4304 | * Print status information about the child process. | |
4305 | */ | |
c906108c | 4306 | |
c3f6f71d JM |
4307 | static void |
4308 | procfs_files_info (ignore) | |
4309 | struct target_ops *ignore; | |
4310 | { | |
4311 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4312 | attach_flag? "attached": "child", | |
4313 | target_pid_to_str (inferior_pid)); | |
4314 | } | |
c906108c | 4315 | |
c3f6f71d JM |
4316 | /* |
4317 | * Function: target_open | |
4318 | * | |
4319 | * A dummy: you don't open procfs. | |
c906108c SS |
4320 | */ |
4321 | ||
4322 | static void | |
c3f6f71d JM |
4323 | procfs_open (args, from_tty) |
4324 | char *args; | |
4325 | int from_tty; | |
c906108c | 4326 | { |
c3f6f71d JM |
4327 | error ("Use the \"run\" command to start a Unix child process."); |
4328 | } | |
c906108c | 4329 | |
c3f6f71d JM |
4330 | /* |
4331 | * Function: target_can_run | |
4332 | * | |
4333 | * This tells GDB that this target vector can be invoked | |
4334 | * for "run" or "attach". | |
4335 | */ | |
c906108c | 4336 | |
c3f6f71d JM |
4337 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4338 | be a runnable target. Used by targets | |
4339 | that can sit atop procfs, such as solaris | |
4340 | thread support. */ | |
c906108c | 4341 | |
c906108c | 4342 | |
c3f6f71d JM |
4343 | static int |
4344 | procfs_can_run () | |
4345 | { | |
4346 | /* This variable is controlled by modules that sit atop procfs that | |
4347 | may layer their own process structure atop that provided here. | |
4348 | sol-thread.c does this because of the Solaris two-level thread | |
4349 | model. */ | |
4350 | ||
4351 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4352 | |
c3f6f71d JM |
4353 | return !procfs_suppress_run; |
4354 | } | |
c906108c | 4355 | |
c3f6f71d JM |
4356 | /* |
4357 | * Function: target_stop | |
4358 | * | |
4359 | * Stop the child process asynchronously, as when the | |
4360 | * gdb user types control-c or presses a "stop" button. | |
4361 | * | |
4362 | * Works by sending kill(SIGINT) to the child's process group. | |
4363 | */ | |
c906108c | 4364 | |
c3f6f71d JM |
4365 | static void |
4366 | procfs_stop () | |
4367 | { | |
4368 | extern pid_t inferior_process_group; | |
c906108c | 4369 | |
c3f6f71d | 4370 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4371 | } |
4372 | ||
c906108c | 4373 | /* |
c3f6f71d JM |
4374 | * Function: unconditionally_kill_inferior |
4375 | * | |
4376 | * Make it die. Wait for it to die. Clean up after it. | |
4377 | * Note: this should only be applied to the real process, | |
4378 | * not to an LWP, because of the check for parent-process. | |
4379 | * If we need this to work for an LWP, it needs some more logic. | |
4380 | */ | |
c906108c | 4381 | |
c3f6f71d JM |
4382 | static void |
4383 | unconditionally_kill_inferior (pi) | |
4384 | procinfo *pi; | |
4385 | { | |
4386 | int parent_pid; | |
c906108c | 4387 | |
c3f6f71d JM |
4388 | parent_pid = proc_parent_pid (pi); |
4389 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4390 | /* FIXME: use access functions */ | |
4391 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4392 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4393 | file for the inferior. */ | |
4394 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4395 | { | |
4396 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4397 | } | |
4398 | #endif | |
4399 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4400 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4401 | to kill the inferior, otherwise it might remain stopped with a | |
4402 | pending SIGKILL. | |
4403 | We do not check the result of the PIOCSSIG, the inferior might have | |
4404 | died already. */ | |
4405 | { | |
4406 | struct siginfo newsiginfo; | |
c906108c | 4407 | |
c3f6f71d JM |
4408 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4409 | newsiginfo.si_signo = SIGKILL; | |
4410 | newsiginfo.si_code = 0; | |
4411 | newsiginfo.si_errno = 0; | |
4412 | newsiginfo.si_pid = getpid (); | |
4413 | newsiginfo.si_uid = getuid (); | |
4414 | /* FIXME: use proc_set_current_signal */ | |
4415 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4416 | } | |
4417 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4418 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4419 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4420 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4421 | destroy_procinfo (pi); | |
c906108c | 4422 | |
c3f6f71d JM |
4423 | /* If pi is GDB's child, wait for it to die. */ |
4424 | if (parent_pid == getpid ()) | |
4425 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4426 | Should we check the returned event? */ | |
4427 | { | |
0d06e24b | 4428 | #if 0 |
c3f6f71d | 4429 | int status, ret; |
c906108c | 4430 | |
c3f6f71d JM |
4431 | ret = waitpid (pi->pid, &status, 0); |
4432 | #else | |
4433 | wait (NULL); | |
4434 | #endif | |
4435 | } | |
4436 | } | |
c906108c | 4437 | |
c3f6f71d JM |
4438 | /* |
4439 | * Function: target_kill_inferior | |
4440 | * | |
4441 | * We're done debugging it, and we want it to go away. | |
4442 | * Then we want GDB to forget all about it. | |
c906108c SS |
4443 | */ |
4444 | ||
c3f6f71d JM |
4445 | static void |
4446 | procfs_kill_inferior () | |
c906108c | 4447 | { |
c3f6f71d JM |
4448 | if (inferior_pid != 0) /* ? */ |
4449 | { | |
4450 | /* Find procinfo for main process */ | |
4451 | procinfo *pi = find_procinfo (PIDGET (inferior_pid), 0); | |
c906108c | 4452 | |
c3f6f71d JM |
4453 | if (pi) |
4454 | unconditionally_kill_inferior (pi); | |
4455 | target_mourn_inferior (); | |
c906108c | 4456 | } |
c3f6f71d JM |
4457 | } |
4458 | ||
4459 | /* | |
4460 | * Function: target_mourn_inferior | |
4461 | * | |
4462 | * Forget we ever debugged this thing! | |
4463 | */ | |
c906108c | 4464 | |
c3f6f71d JM |
4465 | static void |
4466 | procfs_mourn_inferior () | |
4467 | { | |
4468 | procinfo *pi; | |
c906108c | 4469 | |
c3f6f71d JM |
4470 | if (inferior_pid != 0) |
4471 | { | |
4472 | /* Find procinfo for main process */ | |
4473 | pi = find_procinfo (PIDGET (inferior_pid), 0); | |
4474 | if (pi) | |
4475 | destroy_procinfo (pi); | |
c906108c | 4476 | } |
c3f6f71d JM |
4477 | unpush_target (&procfs_ops); |
4478 | generic_mourn_inferior (); | |
4479 | } | |
c906108c | 4480 | |
c3f6f71d JM |
4481 | /* |
4482 | * Function: init_inferior | |
4483 | * | |
4484 | * When GDB forks to create a runnable inferior process, | |
4485 | * this function is called on the parent side of the fork. | |
4486 | * It's job is to do whatever is necessary to make the child | |
4487 | * ready to be debugged, and then wait for the child to synchronize. | |
4488 | */ | |
c906108c | 4489 | |
c3f6f71d JM |
4490 | static void |
4491 | procfs_init_inferior (pid) | |
4492 | int pid; | |
4493 | { | |
4494 | procinfo *pi; | |
4495 | sigset_t signals; | |
4496 | int fail; | |
c906108c | 4497 | |
c3f6f71d JM |
4498 | /* This routine called on the parent side (GDB side) |
4499 | after GDB forks the inferior. */ | |
c906108c | 4500 | |
c3f6f71d | 4501 | push_target (&procfs_ops); |
c906108c | 4502 | |
c3f6f71d JM |
4503 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4504 | perror ("procfs: out of memory in 'init_inferior'"); | |
4505 | ||
4506 | if (!open_procinfo_files (pi, FD_CTL)) | |
4507 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4508 | ||
4509 | /* | |
4510 | xmalloc // done | |
4511 | open_procinfo_files // done | |
4512 | link list // done | |
4513 | prfillset (trace) | |
4514 | procfs_notice_signals | |
4515 | prfillset (fault) | |
4516 | prdelset (FLTPAGE) | |
4517 | PIOCWSTOP | |
4518 | PIOCSFAULT | |
4519 | */ | |
4520 | ||
4521 | /* If not stopped yet, wait for it to stop. */ | |
4522 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4523 | !(proc_wait_for_stop (pi))) | |
4524 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4525 | ||
4526 | /* Save some of the /proc state to be restored if we detach. */ | |
4527 | /* FIXME: Why? In case another debugger was debugging it? | |
4528 | We're it's parent, for Ghu's sake! */ | |
4529 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4530 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4531 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4532 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4533 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4534 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
4535 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
4536 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); | |
4537 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
4538 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); | |
4539 | ||
4540 | /* Register to trace selected signals in the child. */ | |
4541 | prfillset (&signals); | |
4542 | if (!register_gdb_signals (pi, &signals)) | |
4543 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4544 | ||
4545 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4546 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4547 | ||
0d06e24b JM |
4548 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4549 | and possibly even turning ON kill-on-last-close at this point. But | |
4550 | I can't make that change without careful testing which I don't have | |
4551 | time to do right now... */ | |
c3f6f71d JM |
4552 | /* Turn on run-on-last-close flag so that the child |
4553 | will die if GDB goes away for some reason. */ | |
4554 | if (!proc_set_run_on_last_close (pi)) | |
4555 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4556 | ||
4557 | /* The 'process ID' we return to GDB is composed of | |
4558 | the actual process ID plus the lwp ID. */ | |
4559 | inferior_pid = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c | 4560 | |
c3f6f71d JM |
4561 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4562 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4563 | #else | |
4564 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4565 | startup_inferior (2); | |
0d06e24b | 4566 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4567 | } |
c906108c | 4568 | |
c3f6f71d JM |
4569 | /* |
4570 | * Function: set_exec_trap | |
4571 | * | |
4572 | * When GDB forks to create a new process, this function is called | |
4573 | * on the child side of the fork before GDB exec's the user program. | |
4574 | * Its job is to make the child minimally debuggable, so that the | |
4575 | * parent GDB process can connect to the child and take over. | |
4576 | * This function should do only the minimum to make that possible, | |
4577 | * and to synchronize with the parent process. The parent process | |
4578 | * should take care of the details. | |
4579 | */ | |
4580 | ||
4581 | static void | |
4582 | procfs_set_exec_trap () | |
4583 | { | |
4584 | /* This routine called on the child side (inferior side) | |
4585 | after GDB forks the inferior. It must use only local variables, | |
4586 | because it may be sharing data space with its parent. */ | |
c906108c | 4587 | |
c3f6f71d JM |
4588 | procinfo *pi; |
4589 | sysset_t exitset; | |
c906108c | 4590 | |
c3f6f71d JM |
4591 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4592 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4593 | |
c3f6f71d JM |
4594 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4595 | { | |
4596 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4597 | gdb_flush (gdb_stderr); | |
4598 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4599 | _exit (127); | |
4600 | } | |
c906108c | 4601 | |
c3f6f71d JM |
4602 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4603 | /* OSF method for tracing exec syscalls. Quoting: | |
4604 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4605 | exits from exec system calls because of the user level loader. */ | |
4606 | /* FIXME: make nice and maybe move into an access function. */ | |
4607 | { | |
4608 | int prfs_flags; | |
c906108c | 4609 | |
c3f6f71d JM |
4610 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4611 | { | |
4612 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4613 | gdb_flush (gdb_stderr); | |
4614 | _exit (127); | |
4615 | } | |
4616 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4617 | |
c3f6f71d JM |
4618 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4619 | { | |
4620 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4621 | gdb_flush (gdb_stderr); | |
4622 | _exit (127); | |
4623 | } | |
4624 | } | |
4625 | #else /* not PRFS_STOPEXEC */ | |
4626 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4627 | /* GW: Rationale... | |
4628 | Not all systems with /proc have all the exec* syscalls with the same | |
4629 | names. On the SGI, for example, there is no SYS_exec, but there | |
4630 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4631 | |
c3f6f71d JM |
4632 | premptyset (&exitset); |
4633 | #ifdef SYS_exec | |
4634 | praddset (&exitset, SYS_exec); | |
4635 | #endif | |
4636 | #ifdef SYS_execve | |
4637 | praddset (&exitset, SYS_execve); | |
4638 | #endif | |
4639 | #ifdef SYS_execv | |
4640 | praddset (&exitset, SYS_execv); | |
c906108c | 4641 | #endif |
c906108c | 4642 | |
c3f6f71d | 4643 | if (!proc_set_traced_sysexit (pi, &exitset)) |
c906108c | 4644 | { |
c3f6f71d JM |
4645 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4646 | gdb_flush (gdb_stderr); | |
4647 | _exit (127); | |
c906108c | 4648 | } |
c3f6f71d JM |
4649 | #endif /* PRFS_STOPEXEC */ |
4650 | ||
4651 | /* FIXME: should this be done in the parent instead? */ | |
4652 | /* Turn off inherit on fork flag so that all grand-children | |
4653 | of gdb start with tracing flags cleared. */ | |
4654 | if (!proc_unset_inherit_on_fork (pi)) | |
4655 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4656 | ||
4657 | /* Turn off run on last close flag, so that the child process | |
4658 | cannot run away just because we close our handle on it. | |
4659 | We want it to wait for the parent to attach. */ | |
4660 | if (!proc_unset_run_on_last_close (pi)) | |
4661 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4662 | ||
4663 | /* FIXME: No need to destroy the procinfo -- | |
4664 | we have our own address space, and we're about to do an exec! */ | |
4665 | /*destroy_procinfo (pi);*/ | |
c906108c | 4666 | } |
c906108c | 4667 | |
c3f6f71d JM |
4668 | /* |
4669 | * Function: create_inferior | |
4670 | * | |
4671 | * This function is called BEFORE gdb forks the inferior process. | |
4672 | * Its only real responsibility is to set things up for the fork, | |
4673 | * and tell GDB which two functions to call after the fork (one | |
4674 | * for the parent, and one for the child). | |
4675 | * | |
4676 | * This function does a complicated search for a unix shell program, | |
4677 | * which it then uses to parse arguments and environment variables | |
4678 | * to be sent to the child. I wonder whether this code could not | |
4679 | * be abstracted out and shared with other unix targets such as | |
4680 | * infptrace? | |
4681 | */ | |
c906108c SS |
4682 | |
4683 | static void | |
4684 | procfs_create_inferior (exec_file, allargs, env) | |
4685 | char *exec_file; | |
4686 | char *allargs; | |
4687 | char **env; | |
4688 | { | |
4689 | char *shell_file = getenv ("SHELL"); | |
4690 | char *tryname; | |
4691 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4692 | { | |
4693 | ||
4694 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4695 | just do this the normal way (via execlp, which operates by |
4696 | attempting an exec for each element of the PATH until it | |
4697 | finds one which succeeds), then there will be an exec for | |
4698 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4699 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4700 | for these failed execs with the ones for successful execs | |
4701 | (whether the exec has succeeded is stored at that time in the | |
4702 | carry bit or some such architecture-specific and | |
4703 | non-ABI-specified place). | |
4704 | ||
4705 | So I can't think of anything better than to search the PATH | |
4706 | now. This has several disadvantages: (1) There is a race | |
4707 | condition; if we find a file now and it is deleted before we | |
4708 | exec it, we lose, even if the deletion leaves a valid file | |
4709 | further down in the PATH, (2) there is no way to know exactly | |
4710 | what an executable (in the sense of "capable of being | |
4711 | exec'd") file is. Using access() loses because it may lose | |
4712 | if the caller is the superuser; failing to use it loses if | |
4713 | there are ACLs or some such. */ | |
c906108c SS |
4714 | |
4715 | char *p; | |
4716 | char *p1; | |
4717 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4718 | path is used from within GDB. */ |
c906108c SS |
4719 | char *path = getenv ("PATH"); |
4720 | int len; | |
4721 | struct stat statbuf; | |
4722 | ||
4723 | if (path == NULL) | |
4724 | path = "/bin:/usr/bin"; | |
4725 | ||
4726 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4727 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4728 | { |
4729 | p1 = strchr (p, ':'); | |
4730 | if (p1 != NULL) | |
4731 | len = p1 - p; | |
4732 | else | |
4733 | len = strlen (p); | |
4734 | strncpy (tryname, p, len); | |
4735 | tryname[len] = '\0'; | |
4736 | strcat (tryname, "/"); | |
4737 | strcat (tryname, shell_file); | |
4738 | if (access (tryname, X_OK) < 0) | |
4739 | continue; | |
4740 | if (stat (tryname, &statbuf) < 0) | |
4741 | continue; | |
4742 | if (!S_ISREG (statbuf.st_mode)) | |
4743 | /* We certainly need to reject directories. I'm not quite | |
4744 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4745 | that people want to exec() these things. */ | |
4746 | continue; | |
4747 | break; | |
4748 | } | |
4749 | if (p == NULL) | |
4750 | /* Not found. This must be an error rather than merely passing | |
4751 | the file to execlp(), because execlp() would try all the | |
4752 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
4753 | error ("procfs:%d -- Can't find shell %s in PATH", |
4754 | __LINE__, shell_file); | |
c906108c SS |
4755 | |
4756 | shell_file = tryname; | |
4757 | } | |
4758 | ||
c3f6f71d JM |
4759 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4760 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
4761 | |
4762 | /* We are at the first instruction we care about. */ | |
4763 | /* Pedal to the metal... */ | |
4764 | ||
2acceee2 | 4765 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
4766 | } |
4767 | ||
c3f6f71d JM |
4768 | /* |
4769 | * Function: notice_thread | |
4770 | * | |
4771 | * Callback for find_new_threads. | |
4772 | * Calls "add_thread". | |
4773 | */ | |
c906108c | 4774 | |
c3f6f71d JM |
4775 | static int |
4776 | procfs_notice_thread (pi, thread, ptr) | |
4777 | procinfo *pi; | |
4778 | procinfo *thread; | |
4779 | void *ptr; | |
c906108c | 4780 | { |
c3f6f71d | 4781 | int gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4782 | |
c3f6f71d JM |
4783 | if (!in_thread_list (gdb_threadid)) |
4784 | add_thread (gdb_threadid); | |
c906108c | 4785 | |
c3f6f71d JM |
4786 | return 0; |
4787 | } | |
4788 | ||
4789 | /* | |
4790 | * Function: target_find_new_threads | |
4791 | * | |
4792 | * Query all the threads that the target knows about, | |
4793 | * and give them back to GDB to add to its list. | |
4794 | */ | |
4795 | ||
4796 | void | |
4797 | procfs_find_new_threads () | |
4798 | { | |
4799 | procinfo *pi; | |
4800 | ||
4801 | /* Find procinfo for main process */ | |
4802 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4803 | proc_update_threads (pi); | |
4804 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4805 | } |
4806 | ||
c3f6f71d JM |
4807 | /* |
4808 | * Function: target_thread_alive | |
4809 | * | |
4810 | * Return true if the thread is still 'alive'. | |
4811 | * | |
4812 | * This guy doesn't really seem to be doing his job. | |
4813 | * Got to investigate how to tell when a thread is really gone. | |
4814 | */ | |
c906108c | 4815 | |
c906108c | 4816 | static int |
c3f6f71d JM |
4817 | procfs_thread_alive (pid) |
4818 | int pid; | |
c906108c | 4819 | { |
c3f6f71d JM |
4820 | int proc, thread; |
4821 | procinfo *pi; | |
c906108c | 4822 | |
c3f6f71d JM |
4823 | proc = PIDGET (pid); |
4824 | thread = TIDGET (pid); | |
4825 | /* If I don't know it, it ain't alive! */ | |
4826 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
4827 | return 0; | |
4828 | ||
4829 | /* If I can't get its status, it ain't alive! | |
4830 | What's more, I need to forget about it! */ | |
4831 | if (!proc_get_status (pi)) | |
4832 | { | |
4833 | destroy_procinfo (pi); | |
4834 | return 0; | |
4835 | } | |
4836 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
4837 | return 1; | |
c906108c | 4838 | } |
c3f6f71d JM |
4839 | |
4840 | /* | |
4841 | * Function: target_pid_to_str | |
4842 | * | |
4843 | * Return a string to be used to identify the thread in | |
4844 | * the "info threads" display. | |
4845 | */ | |
4846 | ||
4847 | char * | |
4848 | procfs_pid_to_str (pid) | |
c5aa993b | 4849 | int pid; |
c3f6f71d JM |
4850 | { |
4851 | static char buf[80]; | |
4852 | int proc, thread; | |
4853 | procinfo *pi; | |
4854 | ||
4855 | proc = PIDGET (pid); | |
4856 | thread = TIDGET (pid); | |
4857 | pi = find_procinfo (proc, thread); | |
4858 | ||
4859 | if (thread == 0) | |
4860 | sprintf (buf, "Process %d", proc); | |
4861 | else | |
4862 | sprintf (buf, "LWP %d", thread); | |
4863 | return &buf[0]; | |
4864 | } | |
4865 | ||
4866 | /* | |
4867 | * Function: procfs_set_watchpoint | |
4868 | * Insert a watchpoint | |
4869 | */ | |
4870 | ||
4871 | int | |
4872 | procfs_set_watchpoint (pid, addr, len, rwflag, after) | |
4873 | int pid; | |
c5aa993b | 4874 | CORE_ADDR addr; |
c3f6f71d JM |
4875 | int len; |
4876 | int rwflag; | |
4877 | int after; | |
c906108c | 4878 | { |
c3f6f71d JM |
4879 | #ifndef UNIXWARE |
4880 | int pflags = 0; | |
4881 | procinfo *pi; | |
4882 | ||
4883 | pi = find_procinfo_or_die (pid == -1 ? | |
4884 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4885 | ||
4886 | /* Translate from GDB's flags to /proc's */ | |
4887 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 4888 | { |
c3f6f71d JM |
4889 | switch (rwflag) { /* FIXME: need an enum! */ |
4890 | case hw_write: /* default watchpoint (write) */ | |
4891 | pflags = WRITE_WATCHFLAG; | |
4892 | break; | |
4893 | case hw_read: /* read watchpoint */ | |
4894 | pflags = READ_WATCHFLAG; | |
4895 | break; | |
4896 | case hw_access: /* access watchpoint */ | |
4897 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4898 | break; | |
4899 | case hw_execute: /* execution HW breakpoint */ | |
4900 | pflags = EXEC_WATCHFLAG; | |
4901 | break; | |
4902 | default: /* Something weird. Return error. */ | |
c906108c | 4903 | return -1; |
c3f6f71d JM |
4904 | } |
4905 | if (after) /* Stop after r/w access is completed. */ | |
4906 | pflags |= AFTER_WATCHFLAG; | |
4907 | } | |
4908 | ||
4909 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4910 | { | |
4911 | if (errno == E2BIG) /* Typical error for no resources */ | |
4912 | return -1; /* fail */ | |
4913 | /* GDB may try to remove the same watchpoint twice. | |
4914 | If a remove request returns no match, don't error. */ | |
c906108c | 4915 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4916 | return 0; /* ignore */ |
4917 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4918 | } |
c3f6f71d | 4919 | #endif |
c906108c SS |
4920 | return 0; |
4921 | } | |
4922 | ||
c3f6f71d JM |
4923 | /* |
4924 | * Function: stopped_by_watchpoint | |
4925 | * | |
4926 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
4927 | * else returns zero. | |
4928 | */ | |
4929 | ||
c906108c | 4930 | int |
c5aa993b | 4931 | procfs_stopped_by_watchpoint (pid) |
c3f6f71d | 4932 | int pid; |
c906108c | 4933 | { |
c3f6f71d | 4934 | procinfo *pi; |
c906108c | 4935 | |
c3f6f71d JM |
4936 | pi = find_procinfo_or_die (pid == -1 ? |
4937 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4938 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 4939 | { |
c3f6f71d JM |
4940 | if (proc_why (pi) == PR_FAULTED) |
4941 | { | |
c906108c | 4942 | #ifdef FLTWATCH |
c3f6f71d JM |
4943 | if (proc_what (pi) == FLTWATCH) |
4944 | return 1; | |
c906108c SS |
4945 | #endif |
4946 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4947 | if (proc_what (pi) == FLTKWATCH) |
4948 | return 1; | |
c906108c | 4949 | #endif |
c3f6f71d | 4950 | } |
c906108c SS |
4951 | } |
4952 | return 0; | |
4953 | } | |
c906108c | 4954 | |
c3f6f71d JM |
4955 | #ifdef TM_I386SOL2_H |
4956 | /* | |
4957 | * Function: procfs_find_LDT_entry | |
4958 | * | |
4959 | * Input: | |
4960 | * int pid; // The GDB-style pid-plus-LWP. | |
4961 | * | |
4962 | * Return: | |
4963 | * pointer to the corresponding LDT entry. | |
4964 | */ | |
c906108c | 4965 | |
c3f6f71d JM |
4966 | struct ssd * |
4967 | procfs_find_LDT_entry (pid) | |
c906108c SS |
4968 | int pid; |
4969 | { | |
c3f6f71d JM |
4970 | gdb_gregset_t *gregs; |
4971 | int key; | |
4972 | procinfo *pi; | |
c906108c | 4973 | |
c3f6f71d JM |
4974 | /* Find procinfo for the lwp. */ |
4975 | if ((pi = find_procinfo (PIDGET (pid), TIDGET (pid))) == NULL) | |
c906108c | 4976 | { |
c3f6f71d JM |
4977 | warning ("procfs_find_LDT_entry: could not find procinfi for %d.", |
4978 | pid); | |
4979 | return NULL; | |
c906108c | 4980 | } |
c3f6f71d JM |
4981 | /* get its general registers. */ |
4982 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
4983 | { | |
4984 | warning ("procfs_find_LDT_entry: could not read gregs for %d.", | |
4985 | pid); | |
4986 | return NULL; | |
4987 | } | |
4988 | /* Now extract the GS register's lower 16 bits. */ | |
4989 | key = (*gregs)[GS] & 0xffff; | |
4990 | ||
4991 | /* Find the matching entry and return it. */ | |
4992 | return proc_get_LDT_entry (pi, key); | |
c906108c | 4993 | } |
c3f6f71d | 4994 | #endif /* TM_I386SOL2_H */ |
c906108c | 4995 | |
c3f6f71d JM |
4996 | |
4997 | ||
4998 | static void | |
4999 | info_proc_cmd (args, from_tty) | |
5000 | char *args; | |
5001 | int from_tty; | |
c906108c | 5002 | { |
c3f6f71d JM |
5003 | struct cleanup *old_chain; |
5004 | procinfo *process = NULL; | |
5005 | procinfo *thread = NULL; | |
5006 | char **argv = NULL; | |
5007 | char *tmp = NULL; | |
5008 | int pid = 0; | |
5009 | int tid = 0; | |
c906108c | 5010 | |
c3f6f71d JM |
5011 | old_chain = make_cleanup (null_cleanup, 0); |
5012 | if (args) | |
0fda6bd2 JM |
5013 | { |
5014 | if ((argv = buildargv (args)) == NULL) | |
5015 | nomem (0); | |
5016 | else | |
004527cb | 5017 | make_cleanup_freeargv (argv); |
0fda6bd2 | 5018 | } |
c3f6f71d JM |
5019 | while (argv != NULL && *argv != NULL) |
5020 | { | |
5021 | if (isdigit (argv[0][0])) | |
5022 | { | |
5023 | pid = strtoul (argv[0], &tmp, 10); | |
5024 | if (*tmp == '/') | |
5025 | tid = strtoul (++tmp, NULL, 10); | |
5026 | } | |
5027 | else if (argv[0][0] == '/') | |
5028 | { | |
5029 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5030 | } | |
5031 | else | |
5032 | { | |
5033 | /* [...] */ | |
5034 | } | |
5035 | argv++; | |
5036 | } | |
5037 | if (pid == 0) | |
5038 | pid = PIDGET (inferior_pid); | |
5039 | if (pid == 0) | |
5040 | error ("No current process: you must name one."); | |
5041 | else | |
c906108c | 5042 | { |
c3f6f71d JM |
5043 | /* Have pid, will travel. |
5044 | First see if it's a process we're already debugging. */ | |
5045 | process = find_procinfo (pid, 0); | |
5046 | if (process == NULL) | |
5047 | { | |
5048 | /* No. So open a procinfo for it, but | |
5049 | remember to close it again when finished. */ | |
5050 | process = create_procinfo (pid, 0); | |
004527cb | 5051 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5052 | if (!open_procinfo_files (process, FD_CTL)) |
5053 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5054 | } | |
c906108c | 5055 | } |
c3f6f71d JM |
5056 | if (tid != 0) |
5057 | thread = create_procinfo (pid, tid); | |
5058 | ||
5059 | if (process) | |
5060 | { | |
5061 | printf_filtered ("process %d flags:\n", process->pid); | |
5062 | proc_prettyprint_flags (proc_flags (process), 1); | |
5063 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5064 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5065 | if (proc_get_nthreads (process) > 1) | |
5066 | printf_filtered ("Process has %d threads.\n", | |
5067 | proc_get_nthreads (process)); | |
5068 | } | |
5069 | if (thread) | |
5070 | { | |
5071 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5072 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5073 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5074 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5075 | } | |
5076 | ||
5077 | do_cleanups (old_chain); | |
c906108c SS |
5078 | } |
5079 | ||
c3f6f71d JM |
5080 | static void |
5081 | proc_trace_syscalls (args, from_tty, entry_or_exit, mode) | |
5082 | char *args; | |
5083 | int from_tty; | |
5084 | int entry_or_exit; | |
5085 | int mode; | |
c906108c | 5086 | { |
c3f6f71d JM |
5087 | procinfo *pi; |
5088 | sysset_t *sysset; | |
5089 | int syscallnum = 0; | |
c906108c | 5090 | |
c3f6f71d JM |
5091 | if (inferior_pid <= 0) |
5092 | error ("you must be debugging a process to use this command."); | |
c906108c | 5093 | |
c3f6f71d JM |
5094 | if (args == NULL || args[0] == 0) |
5095 | error_no_arg ("system call to trace"); | |
5096 | ||
5097 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
5098 | if (isdigit (args[0])) | |
5099 | { | |
5100 | syscallnum = atoi (args); | |
5101 | if (entry_or_exit == PR_SYSENTRY) | |
5102 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5103 | else | |
5104 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5105 | |
c3f6f71d JM |
5106 | if (sysset == NULL) |
5107 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5108 | |
c3f6f71d JM |
5109 | if (mode == FLAG_SET) |
5110 | praddset (sysset, syscallnum); | |
5111 | else | |
5112 | prdelset (sysset, syscallnum); | |
c906108c | 5113 | |
c3f6f71d JM |
5114 | if (entry_or_exit == PR_SYSENTRY) |
5115 | { | |
5116 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5117 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5118 | } | |
5119 | else | |
5120 | { | |
5121 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5122 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5123 | } | |
5124 | } | |
5125 | } | |
5126 | ||
5127 | static void | |
5128 | proc_trace_sysentry_cmd (args, from_tty) | |
5129 | char *args; | |
5130 | int from_tty; | |
c906108c | 5131 | { |
c3f6f71d JM |
5132 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5133 | } | |
c906108c | 5134 | |
c3f6f71d JM |
5135 | static void |
5136 | proc_trace_sysexit_cmd (args, from_tty) | |
5137 | char *args; | |
5138 | int from_tty; | |
5139 | { | |
5140 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5141 | } |
c906108c | 5142 | |
c3f6f71d JM |
5143 | static void |
5144 | proc_untrace_sysentry_cmd (args, from_tty) | |
5145 | char *args; | |
5146 | int from_tty; | |
5147 | { | |
5148 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5149 | } | |
5150 | ||
5151 | static void | |
5152 | proc_untrace_sysexit_cmd (args, from_tty) | |
5153 | char *args; | |
5154 | int from_tty; | |
c906108c | 5155 | { |
c3f6f71d JM |
5156 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5157 | } | |
c906108c | 5158 | |
c906108c | 5159 | |
c906108c SS |
5160 | void |
5161 | _initialize_procfs () | |
5162 | { | |
c906108c SS |
5163 | init_procfs_ops (); |
5164 | add_target (&procfs_ops); | |
c3f6f71d JM |
5165 | add_info ("proc", info_proc_cmd, |
5166 | "Show /proc process information about any running process.\ | |
5167 | Default is the process being debugged."); | |
5168 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, | |
5169 | "Give a trace of entries into the syscall."); | |
5170 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5171 | "Give a trace of exits from the syscall."); | |
5172 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5173 | "Cancel a trace of entries into the syscall."); | |
5174 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5175 | "Cancel a trace of exits from the syscall."); | |
c3f6f71d JM |
5176 | } |
5177 | ||
5178 | /* =================== END, GDB "MODULE" =================== */ | |
5179 | ||
5180 | ||
5181 | ||
5182 | /* miscelaneous stubs: */ | |
5183 | /* The following satisfy a few random symbols mostly created by */ | |
5184 | /* the solaris threads implementation, which I will chase down */ | |
5185 | /* later. */ | |
5186 | ||
5187 | /* | |
5188 | * Return a pid for which we guarantee | |
5189 | * we will be able to find a 'live' procinfo. | |
5190 | */ | |
5191 | ||
5192 | int | |
5193 | procfs_first_available () | |
5194 | { | |
5195 | if (procinfo_list) | |
5196 | return procinfo_list->pid; | |
5197 | else | |
5198 | return -1; | |
5199 | } |