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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
b6ba6518 | 2 | Copyright 1999, 2000, 2001 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 *); | |
043780a1 AC |
116 | static int procfs_xfer_memory (CORE_ADDR, char *, int, int, |
117 | struct mem_attrib *attrib, | |
118 | struct target_ops *); | |
a14ed312 KB |
119 | |
120 | static int procfs_thread_alive (int); | |
121 | ||
122 | void procfs_find_new_threads (void); | |
123 | char *procfs_pid_to_str (int); | |
c3f6f71d JM |
124 | |
125 | struct target_ops procfs_ops; /* the target vector */ | |
c906108c | 126 | |
c3f6f71d | 127 | static void |
fba45db2 | 128 | init_procfs_ops (void) |
c3f6f71d JM |
129 | { |
130 | procfs_ops.to_shortname = "procfs"; | |
131 | procfs_ops.to_longname = "Unix /proc child process"; | |
132 | procfs_ops.to_doc = | |
133 | "Unix /proc child process (started by the \"run\" command)."; | |
134 | procfs_ops.to_open = procfs_open; | |
135 | procfs_ops.to_can_run = procfs_can_run; | |
136 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
137 | procfs_ops.to_kill = procfs_kill_inferior; | |
138 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
139 | procfs_ops.to_attach = procfs_attach; | |
140 | procfs_ops.to_detach = procfs_detach; | |
141 | procfs_ops.to_wait = procfs_wait; | |
142 | procfs_ops.to_resume = procfs_resume; | |
143 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
144 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
145 | procfs_ops.to_store_registers = procfs_store_registers; | |
146 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
147 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
148 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
149 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
150 | procfs_ops.to_files_info = procfs_files_info; | |
151 | procfs_ops.to_stop = procfs_stop; | |
152 | ||
153 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
154 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
155 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
156 | procfs_ops.to_terminal_ours = terminal_ours; | |
157 | procfs_ops.to_terminal_info = child_terminal_info; | |
158 | ||
159 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
160 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
161 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
162 | ||
103b3ef5 MS |
163 | procfs_ops.to_has_all_memory = 1; |
164 | procfs_ops.to_has_memory = 1; | |
c3f6f71d JM |
165 | procfs_ops.to_has_execution = 1; |
166 | procfs_ops.to_has_stack = 1; | |
167 | procfs_ops.to_has_registers = 1; | |
168 | procfs_ops.to_stratum = process_stratum; | |
169 | procfs_ops.to_has_thread_control = tc_schedlock; | |
170 | procfs_ops.to_magic = OPS_MAGIC; | |
171 | } | |
c906108c | 172 | |
c3f6f71d JM |
173 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
174 | ||
c3f6f71d JM |
175 | /* |
176 | * World Unification: | |
177 | * | |
178 | * Put any typedefs, defines etc. here that are required for | |
179 | * the unification of code that handles different versions of /proc. | |
180 | */ | |
181 | ||
182 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
183 | #ifndef UNIXWARE | |
184 | enum { READ_WATCHFLAG = WA_READ, | |
185 | WRITE_WATCHFLAG = WA_WRITE, | |
186 | EXEC_WATCHFLAG = WA_EXEC, | |
187 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
188 | }; | |
189 | #endif | |
190 | #else /* Irix method for watchpoints */ | |
191 | enum { READ_WATCHFLAG = MA_READ, | |
192 | WRITE_WATCHFLAG = MA_WRITE, | |
193 | EXEC_WATCHFLAG = MA_EXEC, | |
194 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
195 | }; | |
196 | #endif | |
197 | ||
198 | ||
199 | ||
200 | ||
201 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
202 | ||
203 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
204 | ||
205 | /* The procinfo struct is a wrapper to hold all the state information | |
206 | concerning a /proc process. There should be exactly one procinfo | |
207 | for each process, and since GDB currently can debug only one | |
208 | process at a time, that means there should be only one procinfo. | |
209 | All of the LWP's of a process can be accessed indirectly thru the | |
210 | single process procinfo. | |
211 | ||
212 | However, against the day when GDB may debug more than one process, | |
213 | this data structure is kept in a list (which for now will hold no | |
214 | more than one member), and many functions will have a pointer to a | |
215 | procinfo as an argument. | |
216 | ||
217 | There will be a separate procinfo structure for use by the (not yet | |
218 | implemented) "info proc" command, so that we can print useful | |
219 | information about any random process without interfering with the | |
220 | inferior's procinfo information. */ | |
221 | ||
222 | #ifdef NEW_PROC_API | |
223 | /* format strings for /proc paths */ | |
224 | # ifndef CTL_PROC_NAME_FMT | |
225 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
226 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
227 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
228 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
229 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
230 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
231 | # endif | |
232 | /* the name of the proc status struct depends on the implementation */ | |
233 | typedef pstatus_t gdb_prstatus_t; | |
234 | typedef lwpstatus_t gdb_lwpstatus_t; | |
235 | #else /* ! NEW_PROC_API */ | |
236 | /* format strings for /proc paths */ | |
237 | # ifndef CTL_PROC_NAME_FMT | |
238 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
239 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
240 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
241 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
242 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
243 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
244 | # endif | |
c906108c | 245 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 246 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
247 | typedef prstatus_t gdb_lwpstatus_t; |
248 | #endif /* NEW_PROC_API */ | |
c906108c | 249 | |
0d06e24b JM |
250 | /* Provide default composite pid manipulation macros for systems that |
251 | don't have threads. */ | |
c906108c | 252 | |
c3f6f71d | 253 | #ifndef PIDGET |
0d06e24b JM |
254 | #define PIDGET(PID) (PID) |
255 | #define TIDGET(PID) (PID) | |
eeefac92 AC |
256 | #endif |
257 | #ifndef MERGEPID | |
0d06e24b | 258 | #define MERGEPID(PID, TID) (PID) |
c906108c SS |
259 | #endif |
260 | ||
c3f6f71d JM |
261 | typedef struct procinfo { |
262 | struct procinfo *next; | |
263 | int pid; /* Process ID */ | |
264 | int tid; /* Thread/LWP id */ | |
c906108c | 265 | |
c3f6f71d JM |
266 | /* process state */ |
267 | int was_stopped; | |
268 | int ignore_next_sigstop; | |
c906108c | 269 | |
c3f6f71d JM |
270 | /* The following four fd fields may be identical, or may contain |
271 | several different fd's, depending on the version of /proc | |
272 | (old ioctl or new read/write). */ | |
c906108c | 273 | |
c3f6f71d JM |
274 | int ctl_fd; /* File descriptor for /proc control file */ |
275 | /* | |
276 | * The next three file descriptors are actually only needed in the | |
277 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
278 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
279 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
280 | * implementation) filling them with copies of the control fd. | |
281 | */ | |
282 | int status_fd; /* File descriptor for /proc status file */ | |
283 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 284 | |
c3f6f71d | 285 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 286 | |
c3f6f71d JM |
287 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
288 | sigset_t saved_sigset; /* Saved traced signal set */ | |
289 | sigset_t saved_sighold; /* Saved held signal set */ | |
290 | sysset_t saved_exitset; /* Saved traced system call exit set */ | |
291 | sysset_t saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 292 | |
c3f6f71d | 293 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 294 | |
c3f6f71d JM |
295 | #ifndef NEW_PROC_API |
296 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 297 | #endif |
c3f6f71d JM |
298 | |
299 | struct procinfo *thread_list; | |
c906108c | 300 | |
c3f6f71d JM |
301 | int status_valid : 1; |
302 | int gregs_valid : 1; | |
303 | int fpregs_valid : 1; | |
304 | int threads_valid: 1; | |
305 | } procinfo; | |
c906108c | 306 | |
c3f6f71d | 307 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 308 | |
c3f6f71d | 309 | /* Function prototypes for procinfo module: */ |
c906108c | 310 | |
a14ed312 KB |
311 | static procinfo *find_procinfo_or_die (int pid, int tid); |
312 | static procinfo *find_procinfo (int pid, int tid); | |
313 | static procinfo *create_procinfo (int pid, int tid); | |
314 | static void destroy_procinfo (procinfo * p); | |
004527cb | 315 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
316 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
317 | static int open_procinfo_files (procinfo * p, int which); | |
318 | static void close_procinfo_files (procinfo * p); | |
c906108c | 319 | |
c3f6f71d JM |
320 | /* The head of the procinfo list: */ |
321 | static procinfo * procinfo_list; | |
c906108c | 322 | |
c3f6f71d JM |
323 | /* |
324 | * Function: find_procinfo | |
325 | * | |
326 | * Search the procinfo list. | |
327 | * | |
328 | * Returns: pointer to procinfo, or NULL if not found. | |
329 | */ | |
c906108c | 330 | |
c3f6f71d | 331 | static procinfo * |
fba45db2 | 332 | find_procinfo (int pid, int tid) |
c5aa993b | 333 | { |
c3f6f71d | 334 | procinfo *pi; |
c906108c | 335 | |
c3f6f71d JM |
336 | for (pi = procinfo_list; pi; pi = pi->next) |
337 | if (pi->pid == pid) | |
338 | break; | |
c906108c | 339 | |
c3f6f71d JM |
340 | if (pi) |
341 | if (tid) | |
342 | { | |
343 | /* Don't check threads_valid. If we're updating the | |
344 | thread_list, we want to find whatever threads are already | |
345 | here. This means that in general it is the caller's | |
346 | responsibility to check threads_valid and update before | |
347 | calling find_procinfo, if the caller wants to find a new | |
348 | thread. */ | |
349 | ||
350 | for (pi = pi->thread_list; pi; pi = pi->next) | |
351 | if (pi->tid == tid) | |
352 | break; | |
353 | } | |
c906108c | 354 | |
c3f6f71d JM |
355 | return pi; |
356 | } | |
c906108c | 357 | |
c3f6f71d JM |
358 | /* |
359 | * Function: find_procinfo_or_die | |
360 | * | |
361 | * Calls find_procinfo, but errors on failure. | |
362 | */ | |
c906108c | 363 | |
c3f6f71d | 364 | static procinfo * |
fba45db2 | 365 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
366 | { |
367 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 368 | |
c3f6f71d | 369 | if (pi == NULL) |
0fda6bd2 JM |
370 | { |
371 | if (tid) | |
372 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
373 | pid, tid); | |
374 | else | |
375 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
376 | } | |
c3f6f71d JM |
377 | return pi; |
378 | } | |
c906108c | 379 | |
c3f6f71d JM |
380 | /* |
381 | * Function: open_procinfo_files | |
382 | * | |
383 | * Open the file descriptor for the process or LWP. | |
384 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
385 | * the others are opened lazily as needed. | |
386 | * else (if not NEW_PROC_API), there is only one real | |
387 | * file descriptor, but we keep multiple copies of it so that | |
388 | * the code that uses them does not have to be #ifdef'd. | |
389 | * | |
390 | * Return: file descriptor, or zero for failure. | |
391 | */ | |
c906108c | 392 | |
c3f6f71d | 393 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 394 | |
c3f6f71d | 395 | static int |
fba45db2 | 396 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 397 | { |
0fda6bd2 | 398 | #ifdef NEW_PROC_API |
c3f6f71d | 399 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 400 | #endif |
c3f6f71d JM |
401 | int fd; |
402 | ||
403 | /* | |
404 | * This function is getting ALMOST long enough to break up into several. | |
405 | * Here is some rationale: | |
406 | * | |
407 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
408 | * There are several file descriptors that may need to be open | |
409 | * for any given process or LWP. The ones we're intereted in are: | |
410 | * - control (ctl) write-only change the state | |
411 | * - status (status) read-only query the state | |
412 | * - address space (as) read/write access memory | |
413 | * - map (map) read-only virtual addr map | |
414 | * Most of these are opened lazily as they are needed. | |
415 | * The pathnames for the 'files' for an LWP look slightly | |
416 | * different from those of a first-class process: | |
417 | * Pathnames for a process (<proc-id>): | |
418 | * /proc/<proc-id>/ctl | |
419 | * /proc/<proc-id>/status | |
420 | * /proc/<proc-id>/as | |
421 | * /proc/<proc-id>/map | |
422 | * Pathnames for an LWP (lwp-id): | |
423 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
424 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
425 | * An LWP has no map or address space file descriptor, since | |
426 | * the memory map and address space are shared by all LWPs. | |
427 | * | |
428 | * Everyone else (Solaris 2.5, Irix, OSF) | |
429 | * There is only one file descriptor for each process or LWP. | |
430 | * For convenience, we copy the same file descriptor into all | |
431 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
432 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
433 | * doesn't need any #ifdef's. | |
434 | * Pathname for all: | |
435 | * /proc/<proc-id> | |
436 | * | |
437 | * Solaris 2.5 LWP's: | |
438 | * Each LWP has an independent file descriptor, but these | |
439 | * are not obtained via the 'open' system call like the rest: | |
440 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
441 | * to the file descriptor of the parent process. | |
442 | * | |
443 | * OSF threads: | |
444 | * These do not even have their own independent file descriptor. | |
445 | * All operations are carried out on the file descriptor of the | |
446 | * parent process. Therefore we just call open again for each | |
447 | * thread, getting a new handle for the same 'file'. | |
448 | */ | |
449 | ||
450 | #ifdef NEW_PROC_API | |
451 | /* | |
452 | * In this case, there are several different file descriptors that | |
453 | * we might be asked to open. The control file descriptor will be | |
454 | * opened early, but the others will be opened lazily as they are | |
455 | * needed. | |
456 | */ | |
457 | ||
458 | strcpy (tmp, pi->pathname); | |
459 | switch (which) { /* which file descriptor to open? */ | |
460 | case FD_CTL: | |
461 | if (pi->tid) | |
462 | strcat (tmp, "/lwpctl"); | |
463 | else | |
464 | strcat (tmp, "/ctl"); | |
465 | fd = open (tmp, O_WRONLY); | |
466 | if (fd <= 0) | |
467 | return 0; /* fail */ | |
468 | pi->ctl_fd = fd; | |
469 | break; | |
470 | case FD_AS: | |
471 | if (pi->tid) | |
472 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
473 | strcat (tmp, "/as"); | |
474 | fd = open (tmp, O_RDWR); | |
475 | if (fd <= 0) | |
476 | return 0; /* fail */ | |
477 | pi->as_fd = fd; | |
478 | break; | |
479 | case FD_STATUS: | |
480 | if (pi->tid) | |
481 | strcat (tmp, "/lwpstatus"); | |
482 | else | |
483 | strcat (tmp, "/status"); | |
484 | fd = open (tmp, O_RDONLY); | |
485 | if (fd <= 0) | |
486 | return 0; /* fail */ | |
487 | pi->status_fd = fd; | |
488 | break; | |
489 | default: | |
490 | return 0; /* unknown file descriptor */ | |
491 | } | |
492 | #else /* not NEW_PROC_API */ | |
493 | /* | |
494 | * In this case, there is only one file descriptor for each procinfo | |
495 | * (ie. each process or LWP). In fact, only the file descriptor for | |
496 | * the process can actually be opened by an 'open' system call. | |
497 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
498 | * on the process's file descriptor. | |
499 | * | |
500 | * For convenience, we copy each procinfo's single file descriptor | |
501 | * into all of the fields occupied by the several file descriptors | |
502 | * of the NEW_PROC_API implementation. That way, the code that uses | |
503 | * them can be written without ifdefs. | |
504 | */ | |
505 | ||
506 | ||
507 | #ifdef PIOCTSTATUS /* OSF */ | |
508 | if ((fd = open (pi->pathname, O_RDWR)) == 0) /* Only one FD; just open it. */ | |
509 | return 0; | |
510 | #else /* Sol 2.5, Irix, other? */ | |
511 | if (pi->tid == 0) /* Master procinfo for the process */ | |
512 | { | |
513 | fd = open (pi->pathname, O_RDWR); | |
514 | if (fd <= 0) | |
515 | return 0; /* fail */ | |
516 | } | |
517 | else /* LWP thread procinfo */ | |
518 | { | |
519 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
520 | procinfo *process; | |
521 | int lwpid = pi->tid; | |
522 | ||
523 | /* Find the procinfo for the entire process. */ | |
524 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
525 | return 0; /* fail */ | |
526 | ||
527 | /* Now obtain the file descriptor for the LWP. */ | |
528 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
529 | return 0; /* fail */ | |
530 | #else /* Irix, other? */ | |
531 | return 0; /* Don't know how to open threads */ | |
532 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
533 | } | |
534 | #endif /* OSF PIOCTSTATUS */ | |
535 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
536 | #endif /* NEW_PROC_API */ | |
c906108c | 537 | |
c3f6f71d JM |
538 | return 1; /* success */ |
539 | } | |
c906108c | 540 | |
c3f6f71d JM |
541 | /* |
542 | * Function: create_procinfo | |
543 | * | |
544 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 545 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
546 | * |
547 | * Return: pointer to new procinfo struct. | |
548 | */ | |
c906108c | 549 | |
c3f6f71d | 550 | static procinfo * |
fba45db2 | 551 | create_procinfo (int pid, int tid) |
c3f6f71d JM |
552 | { |
553 | procinfo *pi, *parent; | |
c906108c | 554 | |
0d06e24b | 555 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 556 | return pi; /* Already exists, nothing to do. */ |
c906108c | 557 | |
c3f6f71d JM |
558 | /* find parent before doing malloc, to save having to cleanup */ |
559 | if (tid != 0) | |
560 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
561 | create it if it | |
562 | doesn't exist yet? */ | |
c906108c | 563 | |
c3f6f71d JM |
564 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
565 | memset (pi, 0, sizeof (procinfo)); | |
566 | pi->pid = pid; | |
567 | pi->tid = tid; | |
c906108c | 568 | |
c3f6f71d JM |
569 | /* Chain into list. */ |
570 | if (tid == 0) | |
571 | { | |
572 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
573 | pi->next = procinfo_list; | |
574 | procinfo_list = pi; | |
575 | } | |
576 | else | |
577 | { | |
578 | #ifdef NEW_PROC_API | |
579 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
580 | #else | |
581 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
582 | #endif | |
583 | pi->next = parent->thread_list; | |
584 | parent->thread_list = pi; | |
585 | } | |
586 | return pi; | |
587 | } | |
c906108c | 588 | |
c3f6f71d JM |
589 | /* |
590 | * Function: close_procinfo_files | |
591 | * | |
592 | * Close all file descriptors associated with the procinfo | |
593 | */ | |
c906108c | 594 | |
c3f6f71d | 595 | static void |
fba45db2 | 596 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
597 | { |
598 | if (pi->ctl_fd > 0) | |
599 | close (pi->ctl_fd); | |
600 | #ifdef NEW_PROC_API | |
601 | if (pi->as_fd > 0) | |
602 | close (pi->as_fd); | |
603 | if (pi->status_fd > 0) | |
604 | close (pi->status_fd); | |
605 | #endif | |
606 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
607 | } | |
c906108c | 608 | |
c3f6f71d JM |
609 | /* |
610 | * Function: destroy_procinfo | |
611 | * | |
612 | * Destructor function. Close, unlink and deallocate the object. | |
613 | */ | |
c906108c | 614 | |
c3f6f71d | 615 | static void |
fba45db2 | 616 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
617 | { |
618 | procinfo *ptr; | |
619 | ||
620 | /* Step one: unlink the procinfo from its list */ | |
621 | if (pi == *list) | |
622 | *list = pi->next; | |
623 | else | |
624 | for (ptr = *list; ptr; ptr = ptr->next) | |
625 | if (ptr->next == pi) | |
626 | { | |
627 | ptr->next = pi->next; | |
628 | break; | |
629 | } | |
7a292a7a | 630 | |
c3f6f71d JM |
631 | /* Step two: close any open file descriptors */ |
632 | close_procinfo_files (pi); | |
7a292a7a | 633 | |
c3f6f71d | 634 | /* Step three: free the memory. */ |
b8c9b27d | 635 | xfree (pi); |
c3f6f71d | 636 | } |
c906108c | 637 | |
c3f6f71d | 638 | static void |
fba45db2 | 639 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
640 | { |
641 | procinfo *tmp; | |
c906108c | 642 | |
c3f6f71d JM |
643 | if (pi->tid != 0) /* destroy a thread procinfo */ |
644 | { | |
645 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
646 | destroy_one_procinfo (&tmp->thread_list, pi); | |
647 | } | |
648 | else /* destroy a process procinfo and all its threads */ | |
649 | { | |
650 | /* First destroy the children, if any; */ | |
651 | while (pi->thread_list != NULL) | |
652 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
653 | /* Then destroy the parent. Genocide!!! */ | |
654 | destroy_one_procinfo (&procinfo_list, pi); | |
655 | } | |
656 | } | |
c906108c | 657 | |
004527cb AC |
658 | static void |
659 | do_destroy_procinfo_cleanup (void *pi) | |
660 | { | |
661 | destroy_procinfo (pi); | |
662 | } | |
663 | ||
c3f6f71d | 664 | enum { NOKILL, KILL }; |
c906108c | 665 | |
c3f6f71d JM |
666 | /* |
667 | * Function: dead_procinfo | |
668 | * | |
669 | * To be called on a non_recoverable error for a procinfo. | |
670 | * Prints error messages, optionally sends a SIGKILL to the process, | |
671 | * then destroys the data structure. | |
672 | */ | |
c906108c | 673 | |
c3f6f71d | 674 | static void |
fba45db2 | 675 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
676 | { |
677 | char procfile[80]; | |
c906108c | 678 | |
c3f6f71d JM |
679 | if (pi->pathname) |
680 | { | |
681 | print_sys_errmsg (pi->pathname, errno); | |
682 | } | |
683 | else | |
684 | { | |
685 | sprintf (procfile, "process %d", pi->pid); | |
686 | print_sys_errmsg (procfile, errno); | |
687 | } | |
688 | if (kill_p == KILL) | |
689 | kill (pi->pid, SIGKILL); | |
c906108c | 690 | |
c3f6f71d JM |
691 | destroy_procinfo (pi); |
692 | error (msg); | |
693 | } | |
c906108c | 694 | |
c3f6f71d | 695 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 696 | |
c3f6f71d | 697 | /* =================== /proc "MODULE" =================== */ |
c906108c | 698 | |
c3f6f71d JM |
699 | /* |
700 | * This "module" is the interface layer between the /proc system API | |
701 | * and the gdb target vector functions. This layer consists of | |
702 | * access functions that encapsulate each of the basic operations | |
703 | * that we need to use from the /proc API. | |
704 | * | |
705 | * The main motivation for this layer is to hide the fact that | |
706 | * there are two very different implementations of the /proc API. | |
707 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
708 | * functions, we do our best to hide them all in here. | |
709 | */ | |
c906108c | 710 | |
a14ed312 KB |
711 | int proc_get_status (procinfo * pi); |
712 | long proc_flags (procinfo * pi); | |
713 | int proc_why (procinfo * pi); | |
714 | int proc_what (procinfo * pi); | |
715 | int proc_set_run_on_last_close (procinfo * pi); | |
716 | int proc_unset_run_on_last_close (procinfo * pi); | |
717 | int proc_set_inherit_on_fork (procinfo * pi); | |
718 | int proc_unset_inherit_on_fork (procinfo * pi); | |
719 | int proc_set_async (procinfo * pi); | |
720 | int proc_unset_async (procinfo * pi); | |
721 | int proc_stop_process (procinfo * pi); | |
722 | int proc_trace_signal (procinfo * pi, int signo); | |
723 | int proc_ignore_signal (procinfo * pi, int signo); | |
724 | int proc_clear_current_fault (procinfo * pi); | |
725 | int proc_set_current_signal (procinfo * pi, int signo); | |
726 | int proc_clear_current_signal (procinfo * pi); | |
727 | int proc_set_gregs (procinfo * pi); | |
728 | int proc_set_fpregs (procinfo * pi); | |
729 | int proc_wait_for_stop (procinfo * pi); | |
730 | int proc_run_process (procinfo * pi, int step, int signo); | |
731 | int proc_kill (procinfo * pi, int signo); | |
732 | int proc_parent_pid (procinfo * pi); | |
733 | int proc_get_nthreads (procinfo * pi); | |
734 | int proc_get_current_thread (procinfo * pi); | |
735 | int proc_set_held_signals (procinfo * pi, sigset_t * sighold); | |
736 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); | |
737 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
738 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
739 | int proc_set_traced_signals (procinfo * pi, sigset_t * sigset); | |
740 | ||
741 | int proc_update_threads (procinfo * pi); | |
742 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
743 | int (*func) (procinfo *, procinfo *, void *), |
744 | void *ptr); | |
a14ed312 KB |
745 | |
746 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
747 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
748 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
749 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
750 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
751 | sigset_t *proc_get_traced_signals (procinfo * pi, sigset_t * save); | |
752 | sigset_t *proc_get_held_signals (procinfo * pi, sigset_t * save); | |
753 | sigset_t *proc_get_pending_signals (procinfo * pi, sigset_t * save); | |
754 | struct sigaction *proc_get_signal_actions (procinfo * pi, | |
755 | struct sigaction *save); | |
756 | ||
757 | void proc_warn (procinfo * pi, char *func, int line); | |
758 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 759 | |
c3f6f71d | 760 | void |
fba45db2 | 761 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
762 | { |
763 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
764 | print_sys_errmsg (errmsg, errno); | |
765 | } | |
c906108c | 766 | |
c3f6f71d | 767 | void |
fba45db2 | 768 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
769 | { |
770 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
771 | perror_with_name (errmsg); | |
772 | } | |
c906108c | 773 | |
c3f6f71d JM |
774 | /* |
775 | * Function: proc_get_status | |
776 | * | |
777 | * Updates the status struct in the procinfo. | |
778 | * There is a 'valid' flag, to let other functions know when | |
779 | * this function needs to be called (so the status is only | |
780 | * read when it is needed). The status file descriptor is | |
781 | * also only opened when it is needed. | |
782 | * | |
783 | * Return: non-zero for success, zero for failure. | |
784 | */ | |
c906108c | 785 | |
c3f6f71d | 786 | int |
fba45db2 | 787 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
788 | { |
789 | /* Status file descriptor is opened "lazily" */ | |
790 | if (pi->status_fd == 0 && | |
791 | open_procinfo_files (pi, FD_STATUS) == 0) | |
792 | { | |
793 | pi->status_valid = 0; | |
794 | return 0; | |
795 | } | |
c906108c | 796 | |
c3f6f71d JM |
797 | #ifdef NEW_PROC_API |
798 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
799 | pi->status_valid = 0; /* fail */ | |
800 | else | |
801 | { | |
802 | /* Sigh... I have to read a different data structure, | |
803 | depending on whether this is a main process or an LWP. */ | |
804 | if (pi->tid) | |
805 | pi->status_valid = (read (pi->status_fd, | |
806 | (char *) &pi->prstatus.pr_lwp, | |
807 | sizeof (lwpstatus_t)) | |
808 | == sizeof (lwpstatus_t)); | |
809 | else | |
810 | { | |
811 | pi->status_valid = (read (pi->status_fd, | |
812 | (char *) &pi->prstatus, | |
813 | sizeof (gdb_prstatus_t)) | |
814 | == sizeof (gdb_prstatus_t)); | |
815 | #if 0 /*def UNIXWARE*/ | |
816 | if (pi->status_valid && | |
817 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
818 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
819 | /* Unixware peculiarity -- read the damn thing again! */ | |
820 | pi->status_valid = (read (pi->status_fd, | |
821 | (char *) &pi->prstatus, | |
822 | sizeof (gdb_prstatus_t)) | |
823 | == sizeof (gdb_prstatus_t)); | |
824 | #endif /* UNIXWARE */ | |
825 | } | |
826 | } | |
827 | #else /* ioctl method */ | |
828 | #ifdef PIOCTSTATUS /* osf */ | |
829 | if (pi->tid == 0) /* main process */ | |
830 | { | |
831 | /* Just read the danged status. Now isn't that simple? */ | |
832 | pi->status_valid = | |
833 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
834 | } | |
835 | else | |
836 | { | |
837 | int win; | |
838 | struct { | |
839 | long pr_count; | |
840 | tid_t pr_error_thread; | |
841 | struct prstatus status; | |
842 | } thread_status; | |
843 | ||
844 | thread_status.pr_count = 1; | |
845 | thread_status.status.pr_tid = pi->tid; | |
846 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
847 | if (win) | |
848 | { | |
849 | memcpy (&pi->prstatus, &thread_status.status, | |
850 | sizeof (pi->prstatus)); | |
851 | pi->status_valid = 1; | |
852 | } | |
853 | } | |
854 | #else | |
855 | /* Just read the danged status. Now isn't that simple? */ | |
856 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
857 | #endif | |
858 | #endif | |
c906108c | 859 | |
c3f6f71d JM |
860 | if (pi->status_valid) |
861 | { | |
862 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
863 | proc_why (pi), | |
864 | proc_what (pi), | |
865 | proc_get_current_thread (pi)); | |
866 | } | |
c906108c | 867 | |
c3f6f71d JM |
868 | /* The status struct includes general regs, so mark them valid too */ |
869 | pi->gregs_valid = pi->status_valid; | |
870 | #ifdef NEW_PROC_API | |
871 | /* In the read/write multiple-fd model, | |
872 | the status struct includes the fp regs too, so mark them valid too */ | |
873 | pi->fpregs_valid = pi->status_valid; | |
874 | #endif | |
875 | return pi->status_valid; /* True if success, false if failure. */ | |
876 | } | |
c906108c | 877 | |
c3f6f71d JM |
878 | /* |
879 | * Function: proc_flags | |
880 | * | |
881 | * returns the process flags (pr_flags field). | |
882 | */ | |
883 | ||
884 | long | |
fba45db2 | 885 | proc_flags (procinfo *pi) |
c3f6f71d JM |
886 | { |
887 | if (!pi->status_valid) | |
888 | if (!proc_get_status (pi)) | |
889 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 890 | |
c3f6f71d | 891 | #ifdef NEW_PROC_API |
0d06e24b JM |
892 | # ifdef UNIXWARE |
893 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
894 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
895 | The two sets of flags don't overlap. */ | |
896 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
897 | # else | |
c3f6f71d | 898 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 899 | # endif |
c3f6f71d JM |
900 | #else |
901 | return pi->prstatus.pr_flags; | |
902 | #endif | |
903 | } | |
c906108c | 904 | |
c3f6f71d JM |
905 | /* |
906 | * Function: proc_why | |
907 | * | |
908 | * returns the pr_why field (why the process stopped). | |
909 | */ | |
c906108c | 910 | |
c3f6f71d | 911 | int |
fba45db2 | 912 | proc_why (procinfo *pi) |
c3f6f71d JM |
913 | { |
914 | if (!pi->status_valid) | |
915 | if (!proc_get_status (pi)) | |
916 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 917 | |
c3f6f71d JM |
918 | #ifdef NEW_PROC_API |
919 | return pi->prstatus.pr_lwp.pr_why; | |
920 | #else | |
921 | return pi->prstatus.pr_why; | |
922 | #endif | |
923 | } | |
c906108c | 924 | |
c3f6f71d JM |
925 | /* |
926 | * Function: proc_what | |
927 | * | |
928 | * returns the pr_what field (details of why the process stopped). | |
929 | */ | |
c906108c | 930 | |
c3f6f71d | 931 | int |
fba45db2 | 932 | proc_what (procinfo *pi) |
c3f6f71d JM |
933 | { |
934 | if (!pi->status_valid) | |
935 | if (!proc_get_status (pi)) | |
936 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 937 | |
c3f6f71d JM |
938 | #ifdef NEW_PROC_API |
939 | return pi->prstatus.pr_lwp.pr_what; | |
940 | #else | |
941 | return pi->prstatus.pr_what; | |
c906108c | 942 | #endif |
c3f6f71d | 943 | } |
c906108c | 944 | |
c3f6f71d JM |
945 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
946 | /* | |
947 | * Function: proc_nsysarg | |
948 | * | |
949 | * returns the pr_nsysarg field (number of args to the current syscall). | |
950 | */ | |
951 | ||
952 | int | |
fba45db2 | 953 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
954 | { |
955 | if (!pi->status_valid) | |
956 | if (!proc_get_status (pi)) | |
957 | return 0; | |
958 | ||
959 | #ifdef NEW_PROC_API | |
960 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
961 | #else | |
962 | return pi->prstatus.pr_nsysarg; | |
c906108c | 963 | #endif |
c3f6f71d | 964 | } |
c906108c | 965 | |
c3f6f71d JM |
966 | /* |
967 | * Function: proc_sysargs | |
968 | * | |
969 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
970 | */ | |
c906108c | 971 | |
c3f6f71d | 972 | long * |
fba45db2 | 973 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
974 | { |
975 | if (!pi->status_valid) | |
976 | if (!proc_get_status (pi)) | |
977 | return NULL; | |
978 | ||
979 | #ifdef NEW_PROC_API | |
980 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
981 | #else | |
982 | return (long *) &pi->prstatus.pr_sysarg; | |
983 | #endif | |
984 | } | |
c906108c | 985 | |
c3f6f71d JM |
986 | /* |
987 | * Function: proc_syscall | |
988 | * | |
989 | * returns the pr_syscall field (id of current syscall if we are in one). | |
990 | */ | |
c906108c | 991 | |
c3f6f71d | 992 | int |
fba45db2 | 993 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
994 | { |
995 | if (!pi->status_valid) | |
996 | if (!proc_get_status (pi)) | |
997 | return 0; | |
998 | ||
999 | #ifdef NEW_PROC_API | |
1000 | return pi->prstatus.pr_lwp.pr_syscall; | |
1001 | #else | |
1002 | return pi->prstatus.pr_syscall; | |
1003 | #endif | |
1004 | } | |
1005 | #endif /* PIOCSSPCACT */ | |
c906108c | 1006 | |
c3f6f71d JM |
1007 | /* |
1008 | * Function: proc_cursig: | |
1009 | * | |
1010 | * returns the pr_cursig field (current signal). | |
1011 | */ | |
c906108c | 1012 | |
c3f6f71d JM |
1013 | long |
1014 | proc_cursig (struct procinfo *pi) | |
1015 | { | |
1016 | if (!pi->status_valid) | |
1017 | if (!proc_get_status (pi)) | |
1018 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1019 | |
c3f6f71d JM |
1020 | #ifdef NEW_PROC_API |
1021 | return pi->prstatus.pr_lwp.pr_cursig; | |
1022 | #else | |
1023 | return pi->prstatus.pr_cursig; | |
1024 | #endif | |
1025 | } | |
c906108c | 1026 | |
c3f6f71d | 1027 | /* |
0d06e24b | 1028 | * Function: proc_modify_flag |
c3f6f71d JM |
1029 | * |
1030 | * === I appologize for the messiness of this function. | |
1031 | * === This is an area where the different versions of | |
1032 | * === /proc are more inconsistent than usual. MVS | |
1033 | * | |
1034 | * Set or reset any of the following process flags: | |
1035 | * PR_FORK -- forked child will inherit trace flags | |
1036 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1037 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1038 | * PR_ASYNC -- LWP's get to run/stop independently. |
1039 | * | |
1040 | * There are three methods for doing this function: | |
1041 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1042 | * [Sol6, Sol7, UW] | |
1043 | * 2) Middle: PIOCSET/PIOCRESET | |
1044 | * [Irix, Sol5] | |
1045 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1046 | * [OSF, Sol5] | |
1047 | * | |
1048 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1049 | * Note: OSF does not define PR_KLC. |
1050 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1051 | * |
1052 | * Arguments: | |
1053 | * pi -- the procinfo | |
1054 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1055 | * mode -- 1 for set, 0 for reset. | |
1056 | * | |
1057 | * Returns non-zero for success, zero for failure. | |
1058 | */ | |
c906108c | 1059 | |
c3f6f71d | 1060 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1061 | |
c3f6f71d | 1062 | static int |
fba45db2 | 1063 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1064 | { |
1065 | long win = 0; /* default to fail */ | |
1066 | ||
1067 | /* | |
1068 | * These operations affect the process as a whole, and applying | |
1069 | * them to an individual LWP has the same meaning as applying them | |
1070 | * to the main process. Therefore, if we're ever called with a | |
1071 | * pointer to an LWP's procinfo, let's substitute the process's | |
1072 | * procinfo and avoid opening the LWP's file descriptor | |
1073 | * unnecessarily. | |
1074 | */ | |
1075 | ||
1076 | if (pi->pid != 0) | |
1077 | pi = find_procinfo_or_die (pi->pid, 0); | |
1078 | ||
1079 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1080 | /* First normalize the PCUNSET/PCRESET command opcode | |
1081 | (which for no obvious reason has a different definition | |
1082 | from one operating system to the next...) */ | |
1083 | #ifdef PCUNSET | |
1084 | #define GDBRESET PCUNSET | |
1085 | #endif | |
1086 | #ifdef PCRESET | |
1087 | #define GDBRESET PCRESET | |
c906108c | 1088 | #endif |
c3f6f71d JM |
1089 | { |
1090 | long arg[2]; | |
c906108c | 1091 | |
c3f6f71d JM |
1092 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1093 | arg[0] = PCSET; | |
1094 | else /* Reset the flag */ | |
1095 | arg[0] = GDBRESET; | |
c5aa993b | 1096 | |
c3f6f71d JM |
1097 | arg[1] = flag; |
1098 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1099 | } | |
1100 | #else | |
1101 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1102 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1103 | { | |
1104 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1105 | } | |
1106 | else /* Reset the flag */ | |
1107 | { | |
1108 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1109 | } | |
c906108c | 1110 | |
c3f6f71d JM |
1111 | #else |
1112 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1113 | switch (flag) { | |
1114 | case PR_RLC: | |
1115 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1116 | { | |
1117 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1118 | } | |
1119 | else /* Clear run-on-last-close */ | |
1120 | { | |
1121 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1122 | } | |
1123 | break; | |
1124 | case PR_FORK: | |
1125 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1126 | { | |
1127 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1128 | } | |
1129 | else /* Clear inherit-on-fork */ | |
1130 | { | |
1131 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1132 | } | |
1133 | break; | |
1134 | default: | |
1135 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1136 | break; | |
1137 | } | |
1138 | #endif | |
1139 | #endif | |
1140 | #endif | |
1141 | #undef GDBRESET | |
1142 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1143 | pi->status_valid = 0; | |
c906108c | 1144 | |
c3f6f71d JM |
1145 | if (!win) |
1146 | warning ("procfs: modify_flag failed to turn %s %s", | |
1147 | flag == PR_FORK ? "PR_FORK" : | |
1148 | flag == PR_RLC ? "PR_RLC" : | |
1149 | #ifdef PR_ASYNC | |
1150 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1151 | #endif |
1152 | #ifdef PR_KLC | |
1153 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1154 | #endif |
1155 | "<unknown flag>", | |
1156 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1157 | |
c3f6f71d JM |
1158 | return win; |
1159 | } | |
c906108c | 1160 | |
c3f6f71d JM |
1161 | /* |
1162 | * Function: proc_set_run_on_last_close | |
1163 | * | |
1164 | * Set the run_on_last_close flag. | |
1165 | * Process with all threads will become runnable | |
1166 | * when debugger closes all /proc fds. | |
1167 | * | |
1168 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1169 | */ |
1170 | ||
c3f6f71d | 1171 | int |
fba45db2 | 1172 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1173 | { |
c3f6f71d JM |
1174 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1175 | } | |
c906108c | 1176 | |
c3f6f71d JM |
1177 | /* |
1178 | * Function: proc_unset_run_on_last_close | |
1179 | * | |
1180 | * Reset the run_on_last_close flag. | |
1181 | * Process will NOT become runnable | |
1182 | * when debugger closes its file handles. | |
1183 | * | |
1184 | * Returns non-zero for success, zero for failure. | |
1185 | */ | |
c906108c | 1186 | |
c3f6f71d | 1187 | int |
fba45db2 | 1188 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1189 | { |
1190 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1191 | } |
1192 | ||
0d06e24b JM |
1193 | #ifdef PR_KLC |
1194 | /* | |
1195 | * Function: proc_set_kill_on_last_close | |
1196 | * | |
1197 | * Set the kill_on_last_close flag. | |
1198 | * Process with all threads will be killed when debugger | |
1199 | * closes all /proc fds (or debugger exits or dies). | |
1200 | * | |
1201 | * Returns non-zero for success, zero for failure. | |
1202 | */ | |
1203 | ||
1204 | int | |
fba45db2 | 1205 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1206 | { |
1207 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1208 | } | |
1209 | ||
1210 | /* | |
1211 | * Function: proc_unset_kill_on_last_close | |
1212 | * | |
1213 | * Reset the kill_on_last_close flag. | |
1214 | * Process will NOT be killed when debugger | |
1215 | * closes its file handles (or exits or dies). | |
1216 | * | |
1217 | * Returns non-zero for success, zero for failure. | |
1218 | */ | |
1219 | ||
1220 | int | |
fba45db2 | 1221 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1222 | { |
1223 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1224 | } | |
1225 | #endif /* PR_KLC */ | |
1226 | ||
c906108c | 1227 | /* |
c3f6f71d JM |
1228 | * Function: proc_set_inherit_on_fork |
1229 | * | |
1230 | * Set inherit_on_fork flag. | |
1231 | * If the process forks a child while we are registered for events | |
1232 | * in the parent, then we will also recieve events from the child. | |
1233 | * | |
1234 | * Returns non-zero for success, zero for failure. | |
1235 | */ | |
c906108c | 1236 | |
c3f6f71d | 1237 | int |
fba45db2 | 1238 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1239 | { |
1240 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1241 | } | |
c5aa993b | 1242 | |
c3f6f71d JM |
1243 | /* |
1244 | * Function: proc_unset_inherit_on_fork | |
1245 | * | |
1246 | * Reset inherit_on_fork flag. | |
1247 | * If the process forks a child while we are registered for events | |
1248 | * in the parent, then we will NOT recieve events from the child. | |
1249 | * | |
1250 | * Returns non-zero for success, zero for failure. | |
1251 | */ | |
c906108c | 1252 | |
c3f6f71d | 1253 | int |
fba45db2 | 1254 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1255 | { |
1256 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1257 | } | |
c906108c | 1258 | |
c3f6f71d JM |
1259 | #ifdef PR_ASYNC |
1260 | /* | |
1261 | * Function: proc_set_async | |
1262 | * | |
1263 | * Set PR_ASYNC flag. | |
1264 | * If one LWP stops because of a debug event (signal etc.), | |
1265 | * the remaining LWPs will continue to run. | |
1266 | * | |
1267 | * Returns non-zero for success, zero for failure. | |
1268 | */ | |
c906108c | 1269 | |
c3f6f71d | 1270 | int |
fba45db2 | 1271 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1272 | { |
1273 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1274 | } | |
c906108c | 1275 | |
c3f6f71d JM |
1276 | /* |
1277 | * Function: proc_unset_async | |
1278 | * | |
1279 | * Reset PR_ASYNC flag. | |
1280 | * If one LWP stops because of a debug event (signal etc.), | |
1281 | * then all other LWPs will stop as well. | |
1282 | * | |
1283 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1284 | */ |
1285 | ||
c3f6f71d | 1286 | int |
fba45db2 | 1287 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1288 | { |
1289 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1290 | } | |
1291 | #endif /* PR_ASYNC */ | |
c906108c SS |
1292 | |
1293 | /* | |
c3f6f71d JM |
1294 | * Function: proc_stop_process |
1295 | * | |
1296 | * Request the process/LWP to stop. Does not wait. | |
1297 | * Returns non-zero for success, zero for failure. | |
1298 | */ | |
c906108c | 1299 | |
c3f6f71d | 1300 | int |
fba45db2 | 1301 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1302 | { |
1303 | int win; | |
c906108c | 1304 | |
c3f6f71d JM |
1305 | /* |
1306 | * We might conceivably apply this operation to an LWP, and | |
1307 | * the LWP's ctl file descriptor might not be open. | |
1308 | */ | |
c906108c | 1309 | |
c3f6f71d JM |
1310 | if (pi->ctl_fd == 0 && |
1311 | open_procinfo_files (pi, FD_CTL) == 0) | |
1312 | return 0; | |
1313 | else | |
1314 | { | |
1315 | #ifdef NEW_PROC_API | |
6c1a54b2 | 1316 | long cmd = PCSTOP; |
c3f6f71d JM |
1317 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1318 | #else /* ioctl method */ | |
1319 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1320 | /* Note: the call also reads the prstatus. */ | |
1321 | if (win) | |
1322 | { | |
1323 | pi->status_valid = 1; | |
1324 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1325 | proc_why (pi), | |
1326 | proc_what (pi), | |
1327 | proc_get_current_thread (pi)); | |
1328 | } | |
1329 | #endif | |
1330 | } | |
c906108c | 1331 | |
c3f6f71d JM |
1332 | return win; |
1333 | } | |
c5aa993b | 1334 | |
c3f6f71d JM |
1335 | /* |
1336 | * Function: proc_wait_for_stop | |
1337 | * | |
1338 | * Wait for the process or LWP to stop (block until it does). | |
1339 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1340 | */ |
1341 | ||
c3f6f71d | 1342 | int |
fba45db2 | 1343 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1344 | { |
c3f6f71d JM |
1345 | int win; |
1346 | ||
1347 | /* | |
1348 | * We should never have to apply this operation to any procinfo | |
1349 | * except the one for the main process. If that ever changes | |
1350 | * for any reason, then take out the following clause and | |
1351 | * replace it with one that makes sure the ctl_fd is open. | |
1352 | */ | |
1353 | ||
1354 | if (pi->tid != 0) | |
1355 | pi = find_procinfo_or_die (pi->pid, 0); | |
1356 | ||
1357 | #ifdef NEW_PROC_API | |
1358 | { | |
6c1a54b2 | 1359 | long cmd = PCWSTOP; |
c3f6f71d JM |
1360 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1361 | /* We been runnin' and we stopped -- need to update status. */ | |
1362 | pi->status_valid = 0; | |
1363 | } | |
1364 | #else /* ioctl method */ | |
1365 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1366 | /* Above call also refreshes the prstatus. */ | |
1367 | if (win) | |
1368 | { | |
1369 | pi->status_valid = 1; | |
1370 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1371 | proc_why (pi), | |
1372 | proc_what (pi), | |
1373 | proc_get_current_thread (pi)); | |
1374 | } | |
c906108c SS |
1375 | #endif |
1376 | ||
c3f6f71d | 1377 | return win; |
c906108c SS |
1378 | } |
1379 | ||
1380 | /* | |
c3f6f71d JM |
1381 | * Function: proc_run_process |
1382 | * | |
1383 | * Make the process or LWP runnable. | |
1384 | * Options (not all are implemented): | |
1385 | * - single-step | |
1386 | * - clear current fault | |
1387 | * - clear current signal | |
1388 | * - abort the current system call | |
1389 | * - stop as soon as finished with system call | |
1390 | * - (ioctl): set traced signal set | |
1391 | * - (ioctl): set held signal set | |
1392 | * - (ioctl): set traced fault set | |
1393 | * - (ioctl): set start pc (vaddr) | |
1394 | * Always clear the current fault. | |
1395 | * Clear the current signal if 'signo' is zero. | |
1396 | * | |
1397 | * Arguments: | |
1398 | * pi the process or LWP to operate on. | |
1399 | * step if true, set the process or LWP to trap after one instr. | |
1400 | * signo if zero, clear the current signal if any. | |
1401 | * if non-zero, set the current signal to this one. | |
1402 | * | |
1403 | * Returns non-zero for success, zero for failure. | |
1404 | */ | |
1405 | ||
1406 | int | |
fba45db2 | 1407 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1408 | { |
1409 | int win; | |
1410 | int runflags; | |
1411 | ||
1412 | /* | |
1413 | * We will probably have to apply this operation to individual threads, | |
1414 | * so make sure the control file descriptor is open. | |
1415 | */ | |
1416 | ||
1417 | if (pi->ctl_fd == 0 && | |
1418 | open_procinfo_files (pi, FD_CTL) == 0) | |
1419 | { | |
1420 | return 0; | |
1421 | } | |
c906108c | 1422 | |
c3f6f71d JM |
1423 | runflags = PRCFAULT; /* always clear current fault */ |
1424 | if (step) | |
1425 | runflags |= PRSTEP; | |
1426 | if (signo == 0) | |
1427 | runflags |= PRCSIG; | |
1428 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1429 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1430 | |
c3f6f71d JM |
1431 | #ifdef NEW_PROC_API |
1432 | { | |
6c1a54b2 | 1433 | long cmd[2]; |
c906108c | 1434 | |
c3f6f71d JM |
1435 | cmd[0] = PCRUN; |
1436 | cmd[1] = runflags; | |
1437 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1438 | } | |
1439 | #else /* ioctl method */ | |
1440 | { | |
1441 | prrun_t prrun; | |
c906108c | 1442 | |
c3f6f71d JM |
1443 | memset (&prrun, 0, sizeof (prrun)); |
1444 | prrun.pr_flags = runflags; | |
1445 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1446 | } | |
1447 | #endif | |
c906108c | 1448 | |
c3f6f71d JM |
1449 | return win; |
1450 | } | |
c906108c | 1451 | |
c3f6f71d JM |
1452 | /* |
1453 | * Function: proc_set_traced_signals | |
1454 | * | |
1455 | * Register to trace signals in the process or LWP. | |
1456 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1457 | */ |
1458 | ||
c3f6f71d | 1459 | int |
fba45db2 | 1460 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 1461 | { |
c3f6f71d JM |
1462 | int win; |
1463 | ||
1464 | /* | |
1465 | * We should never have to apply this operation to any procinfo | |
1466 | * except the one for the main process. If that ever changes | |
1467 | * for any reason, then take out the following clause and | |
1468 | * replace it with one that makes sure the ctl_fd is open. | |
1469 | */ | |
1470 | ||
1471 | if (pi->tid != 0) | |
1472 | pi = find_procinfo_or_die (pi->pid, 0); | |
1473 | ||
1474 | #ifdef NEW_PROC_API | |
1475 | { | |
1476 | struct { | |
6c1a54b2 | 1477 | long cmd; |
c3f6f71d JM |
1478 | /* Use char array to avoid alignment issues. */ |
1479 | char sigset[sizeof (sigset_t)]; | |
1480 | } arg; | |
c906108c | 1481 | |
c3f6f71d JM |
1482 | arg.cmd = PCSTRACE; |
1483 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
c906108c | 1484 | |
c3f6f71d JM |
1485 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1486 | } | |
1487 | #else /* ioctl method */ | |
1488 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1489 | #endif | |
1490 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1491 | pi->status_valid = 0; | |
c906108c | 1492 | |
c3f6f71d JM |
1493 | if (!win) |
1494 | warning ("procfs: set_traced_signals failed"); | |
1495 | return win; | |
c906108c SS |
1496 | } |
1497 | ||
1498 | /* | |
c3f6f71d JM |
1499 | * Function: proc_set_traced_faults |
1500 | * | |
1501 | * Register to trace hardware faults in the process or LWP. | |
1502 | * Returns non-zero for success, zero for failure. | |
1503 | */ | |
c906108c | 1504 | |
c3f6f71d | 1505 | int |
fba45db2 | 1506 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1507 | { |
1508 | int win; | |
1509 | ||
1510 | /* | |
1511 | * We should never have to apply this operation to any procinfo | |
1512 | * except the one for the main process. If that ever changes | |
1513 | * for any reason, then take out the following clause and | |
1514 | * replace it with one that makes sure the ctl_fd is open. | |
1515 | */ | |
1516 | ||
1517 | if (pi->tid != 0) | |
1518 | pi = find_procinfo_or_die (pi->pid, 0); | |
1519 | ||
1520 | #ifdef NEW_PROC_API | |
1521 | { | |
1522 | struct { | |
6c1a54b2 | 1523 | long cmd; |
c3f6f71d JM |
1524 | /* Use char array to avoid alignment issues. */ |
1525 | char fltset[sizeof (fltset_t)]; | |
1526 | } arg; | |
c906108c | 1527 | |
c3f6f71d JM |
1528 | arg.cmd = PCSFAULT; |
1529 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1530 | |
c3f6f71d JM |
1531 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1532 | } | |
1533 | #else /* ioctl method */ | |
1534 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1535 | #endif | |
1536 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1537 | pi->status_valid = 0; | |
c906108c | 1538 | |
c3f6f71d JM |
1539 | return win; |
1540 | } | |
c5aa993b | 1541 | |
c3f6f71d JM |
1542 | /* |
1543 | * Function: proc_set_traced_sysentry | |
1544 | * | |
1545 | * Register to trace entry to system calls in the process or LWP. | |
1546 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1547 | */ |
1548 | ||
c3f6f71d | 1549 | int |
fba45db2 | 1550 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1551 | { |
c3f6f71d JM |
1552 | int win; |
1553 | ||
1554 | /* | |
1555 | * We should never have to apply this operation to any procinfo | |
1556 | * except the one for the main process. If that ever changes | |
1557 | * for any reason, then take out the following clause and | |
1558 | * replace it with one that makes sure the ctl_fd is open. | |
1559 | */ | |
1560 | ||
1561 | if (pi->tid != 0) | |
1562 | pi = find_procinfo_or_die (pi->pid, 0); | |
1563 | ||
1564 | #ifdef NEW_PROC_API | |
1565 | { | |
1566 | struct { | |
6c1a54b2 | 1567 | long cmd; |
c3f6f71d JM |
1568 | /* Use char array to avoid alignment issues. */ |
1569 | char sysset[sizeof (sysset_t)]; | |
1570 | } arg; | |
1571 | ||
1572 | arg.cmd = PCSENTRY; | |
1573 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
1574 | ||
1575 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
1576 | } | |
1577 | #else /* ioctl method */ | |
1578 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1579 | #endif | |
1580 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1581 | pi->status_valid = 0; | |
1582 | ||
1583 | return win; | |
c906108c SS |
1584 | } |
1585 | ||
1586 | /* | |
c3f6f71d JM |
1587 | * Function: proc_set_traced_sysexit |
1588 | * | |
1589 | * Register to trace exit from system calls in the process or LWP. | |
1590 | * Returns non-zero for success, zero for failure. | |
1591 | */ | |
c906108c | 1592 | |
c3f6f71d | 1593 | int |
fba45db2 | 1594 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1595 | { |
1596 | int win; | |
1597 | ||
1598 | /* | |
1599 | * We should never have to apply this operation to any procinfo | |
1600 | * except the one for the main process. If that ever changes | |
1601 | * for any reason, then take out the following clause and | |
1602 | * replace it with one that makes sure the ctl_fd is open. | |
1603 | */ | |
1604 | ||
1605 | if (pi->tid != 0) | |
1606 | pi = find_procinfo_or_die (pi->pid, 0); | |
1607 | ||
1608 | #ifdef NEW_PROC_API | |
1609 | { | |
1610 | struct { | |
6c1a54b2 | 1611 | long cmd; |
c3f6f71d JM |
1612 | /* Use char array to avoid alignment issues. */ |
1613 | char sysset[sizeof (sysset_t)]; | |
1614 | } arg; | |
c906108c | 1615 | |
c3f6f71d JM |
1616 | arg.cmd = PCSEXIT; |
1617 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1618 | |
c3f6f71d JM |
1619 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1620 | } | |
1621 | #else /* ioctl method */ | |
1622 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1623 | #endif | |
1624 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1625 | pi->status_valid = 0; | |
c906108c | 1626 | |
c3f6f71d JM |
1627 | return win; |
1628 | } | |
c906108c | 1629 | |
c3f6f71d JM |
1630 | /* |
1631 | * Function: proc_set_held_signals | |
1632 | * | |
1633 | * Specify the set of blocked / held signals in the process or LWP. | |
1634 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1635 | */ |
1636 | ||
c3f6f71d | 1637 | int |
fba45db2 | 1638 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1639 | { |
c3f6f71d JM |
1640 | int win; |
1641 | ||
1642 | /* | |
1643 | * We should never have to apply this operation to any procinfo | |
1644 | * except the one for the main process. If that ever changes | |
1645 | * for any reason, then take out the following clause and | |
1646 | * replace it with one that makes sure the ctl_fd is open. | |
1647 | */ | |
1648 | ||
1649 | if (pi->tid != 0) | |
1650 | pi = find_procinfo_or_die (pi->pid, 0); | |
1651 | ||
1652 | #ifdef NEW_PROC_API | |
1653 | { | |
1654 | struct { | |
6c1a54b2 | 1655 | long cmd; |
c3f6f71d JM |
1656 | /* Use char array to avoid alignment issues. */ |
1657 | char hold[sizeof (sigset_t)]; | |
1658 | } arg; | |
1659 | ||
1660 | arg.cmd = PCSHOLD; | |
1661 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1662 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1663 | } | |
c906108c | 1664 | #else |
c3f6f71d | 1665 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1666 | #endif |
c3f6f71d JM |
1667 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1668 | pi->status_valid = 0; | |
1669 | ||
1670 | return win; | |
c906108c SS |
1671 | } |
1672 | ||
1673 | /* | |
c3f6f71d JM |
1674 | * Function: proc_get_pending_signals |
1675 | * | |
1676 | * returns the set of signals that are pending in the process or LWP. | |
1677 | * Will also copy the sigset if 'save' is non-zero. | |
1678 | */ | |
c906108c | 1679 | |
c3f6f71d | 1680 | sigset_t * |
fba45db2 | 1681 | proc_get_pending_signals (procinfo *pi, sigset_t *save) |
c3f6f71d JM |
1682 | { |
1683 | sigset_t *ret = NULL; | |
1684 | ||
1685 | /* | |
1686 | * We should never have to apply this operation to any procinfo | |
1687 | * except the one for the main process. If that ever changes | |
1688 | * for any reason, then take out the following clause and | |
1689 | * replace it with one that makes sure the ctl_fd is open. | |
1690 | */ | |
1691 | ||
1692 | if (pi->tid != 0) | |
1693 | pi = find_procinfo_or_die (pi->pid, 0); | |
1694 | ||
1695 | if (!pi->status_valid) | |
1696 | if (!proc_get_status (pi)) | |
1697 | return NULL; | |
1698 | ||
1699 | #ifdef NEW_PROC_API | |
1700 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1701 | #else | |
1702 | ret = &pi->prstatus.pr_sigpend; | |
1703 | #endif | |
1704 | if (save && ret) | |
1705 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1706 | |
c3f6f71d JM |
1707 | return ret; |
1708 | } | |
c906108c | 1709 | |
c3f6f71d JM |
1710 | /* |
1711 | * Function: proc_get_signal_actions | |
1712 | * | |
1713 | * returns the set of signal actions. | |
1714 | * Will also copy the sigactionset if 'save' is non-zero. | |
1715 | */ | |
c906108c | 1716 | |
c3f6f71d | 1717 | struct sigaction * |
fba45db2 | 1718 | proc_get_signal_actions (procinfo *pi, struct sigaction *save) |
c3f6f71d JM |
1719 | { |
1720 | struct sigaction *ret = NULL; | |
1721 | ||
1722 | /* | |
1723 | * We should never have to apply this operation to any procinfo | |
1724 | * except the one for the main process. If that ever changes | |
1725 | * for any reason, then take out the following clause and | |
1726 | * replace it with one that makes sure the ctl_fd is open. | |
1727 | */ | |
1728 | ||
1729 | if (pi->tid != 0) | |
1730 | pi = find_procinfo_or_die (pi->pid, 0); | |
1731 | ||
1732 | if (!pi->status_valid) | |
1733 | if (!proc_get_status (pi)) | |
1734 | return NULL; | |
1735 | ||
1736 | #ifdef NEW_PROC_API | |
1737 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1738 | #else | |
1739 | ret = &pi->prstatus.pr_action; | |
1740 | #endif | |
1741 | if (save && ret) | |
1742 | memcpy (save, ret, sizeof (struct sigaction)); | |
c906108c | 1743 | |
c3f6f71d JM |
1744 | return ret; |
1745 | } | |
c5aa993b | 1746 | |
c3f6f71d JM |
1747 | /* |
1748 | * Function: proc_get_held_signals | |
1749 | * | |
1750 | * returns the set of signals that are held / blocked. | |
1751 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
1752 | */ |
1753 | ||
c3f6f71d | 1754 | sigset_t * |
fba45db2 | 1755 | proc_get_held_signals (procinfo *pi, sigset_t *save) |
c906108c | 1756 | { |
c3f6f71d JM |
1757 | sigset_t *ret = NULL; |
1758 | ||
1759 | /* | |
1760 | * We should never have to apply this operation to any procinfo | |
1761 | * except the one for the main process. If that ever changes | |
1762 | * for any reason, then take out the following clause and | |
1763 | * replace it with one that makes sure the ctl_fd is open. | |
1764 | */ | |
1765 | ||
1766 | if (pi->tid != 0) | |
1767 | pi = find_procinfo_or_die (pi->pid, 0); | |
1768 | ||
1769 | #ifdef NEW_PROC_API | |
1770 | if (!pi->status_valid) | |
1771 | if (!proc_get_status (pi)) | |
1772 | return NULL; | |
1773 | ||
1774 | #ifdef UNIXWARE | |
1775 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1776 | #else |
c3f6f71d JM |
1777 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1778 | #endif /* UNIXWARE */ | |
1779 | #else /* not NEW_PROC_API */ | |
1780 | { | |
1781 | static sigset_t sigheld; | |
1782 | ||
1783 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1784 | ret = &sigheld; | |
1785 | } | |
1786 | #endif /* NEW_PROC_API */ | |
1787 | if (save && ret) | |
1788 | memcpy (save, ret, sizeof (sigset_t)); | |
1789 | ||
1790 | return ret; | |
c906108c SS |
1791 | } |
1792 | ||
c3f6f71d JM |
1793 | /* |
1794 | * Function: proc_get_traced_signals | |
1795 | * | |
1796 | * returns the set of signals that are traced / debugged. | |
1797 | * Will also copy the sigset if 'save' is non-zero. | |
1798 | */ | |
1799 | ||
1800 | sigset_t * | |
fba45db2 | 1801 | proc_get_traced_signals (procinfo *pi, sigset_t *save) |
c906108c | 1802 | { |
c3f6f71d JM |
1803 | sigset_t *ret = NULL; |
1804 | ||
1805 | /* | |
1806 | * We should never have to apply this operation to any procinfo | |
1807 | * except the one for the main process. If that ever changes | |
1808 | * for any reason, then take out the following clause and | |
1809 | * replace it with one that makes sure the ctl_fd is open. | |
1810 | */ | |
1811 | ||
1812 | if (pi->tid != 0) | |
1813 | pi = find_procinfo_or_die (pi->pid, 0); | |
1814 | ||
1815 | #ifdef NEW_PROC_API | |
1816 | if (!pi->status_valid) | |
1817 | if (!proc_get_status (pi)) | |
1818 | return NULL; | |
1819 | ||
1820 | ret = &pi->prstatus.pr_sigtrace; | |
1821 | #else | |
1822 | { | |
1823 | static sigset_t sigtrace; | |
1824 | ||
1825 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1826 | ret = &sigtrace; | |
1827 | } | |
c906108c | 1828 | #endif |
c3f6f71d JM |
1829 | if (save && ret) |
1830 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1831 | |
c3f6f71d JM |
1832 | return ret; |
1833 | } | |
c906108c | 1834 | |
c3f6f71d JM |
1835 | /* |
1836 | * Function: proc_trace_signal | |
1837 | * | |
1838 | * Add 'signo' to the set of signals that are traced. | |
1839 | * Returns non-zero for success, zero for failure. | |
1840 | */ | |
c906108c | 1841 | |
c3f6f71d | 1842 | int |
fba45db2 | 1843 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1844 | { |
1845 | sigset_t temp; | |
1846 | ||
1847 | /* | |
1848 | * We should never have to apply this operation to any procinfo | |
1849 | * except the one for the main process. If that ever changes | |
1850 | * for any reason, then take out the following clause and | |
1851 | * replace it with one that makes sure the ctl_fd is open. | |
1852 | */ | |
1853 | ||
1854 | if (pi->tid != 0) | |
1855 | pi = find_procinfo_or_die (pi->pid, 0); | |
1856 | ||
1857 | if (pi) | |
c906108c | 1858 | { |
c3f6f71d | 1859 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1860 | { |
c3f6f71d JM |
1861 | praddset (&temp, signo); |
1862 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
1863 | } |
1864 | } | |
c5aa993b | 1865 | |
c3f6f71d JM |
1866 | return 0; /* failure */ |
1867 | } | |
c906108c | 1868 | |
c3f6f71d JM |
1869 | /* |
1870 | * Function: proc_ignore_signal | |
1871 | * | |
1872 | * Remove 'signo' from the set of signals that are traced. | |
1873 | * Returns non-zero for success, zero for failure. | |
1874 | */ | |
c906108c | 1875 | |
c3f6f71d | 1876 | int |
fba45db2 | 1877 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1878 | { |
1879 | sigset_t temp; | |
1880 | ||
1881 | /* | |
1882 | * We should never have to apply this operation to any procinfo | |
1883 | * except the one for the main process. If that ever changes | |
1884 | * for any reason, then take out the following clause and | |
1885 | * replace it with one that makes sure the ctl_fd is open. | |
1886 | */ | |
1887 | ||
1888 | if (pi->tid != 0) | |
1889 | pi = find_procinfo_or_die (pi->pid, 0); | |
1890 | ||
1891 | if (pi) | |
c906108c | 1892 | { |
c3f6f71d | 1893 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1894 | { |
c3f6f71d JM |
1895 | prdelset (&temp, signo); |
1896 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 1897 | } |
c906108c | 1898 | } |
c906108c | 1899 | |
c3f6f71d | 1900 | return 0; /* failure */ |
c906108c SS |
1901 | } |
1902 | ||
1903 | /* | |
c3f6f71d JM |
1904 | * Function: proc_get_traced_faults |
1905 | * | |
1906 | * returns the set of hardware faults that are traced /debugged. | |
1907 | * Will also copy the faultset if 'save' is non-zero. | |
1908 | */ | |
1909 | ||
1910 | fltset_t * | |
fba45db2 | 1911 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1912 | { |
1913 | fltset_t *ret = NULL; | |
1914 | ||
1915 | /* | |
1916 | * We should never have to apply this operation to any procinfo | |
1917 | * except the one for the main process. If that ever changes | |
1918 | * for any reason, then take out the following clause and | |
1919 | * replace it with one that makes sure the ctl_fd is open. | |
1920 | */ | |
1921 | ||
1922 | if (pi->tid != 0) | |
1923 | pi = find_procinfo_or_die (pi->pid, 0); | |
1924 | ||
1925 | #ifdef NEW_PROC_API | |
1926 | if (!pi->status_valid) | |
1927 | if (!proc_get_status (pi)) | |
1928 | return NULL; | |
1929 | ||
1930 | ret = &pi->prstatus.pr_flttrace; | |
1931 | #else | |
1932 | { | |
1933 | static fltset_t flttrace; | |
1934 | ||
1935 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
1936 | ret = &flttrace; | |
1937 | } | |
1938 | #endif | |
1939 | if (save && ret) | |
1940 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1941 | |
c3f6f71d JM |
1942 | return ret; |
1943 | } | |
c906108c | 1944 | |
c3f6f71d JM |
1945 | /* |
1946 | * Function: proc_get_traced_sysentry | |
1947 | * | |
1948 | * returns the set of syscalls that are traced /debugged on entry. | |
1949 | * Will also copy the syscall set if 'save' is non-zero. | |
1950 | */ | |
c906108c | 1951 | |
c3f6f71d | 1952 | sysset_t * |
fba45db2 | 1953 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1954 | { |
1955 | sysset_t *ret = NULL; | |
1956 | ||
1957 | /* | |
1958 | * We should never have to apply this operation to any procinfo | |
1959 | * except the one for the main process. If that ever changes | |
1960 | * for any reason, then take out the following clause and | |
1961 | * replace it with one that makes sure the ctl_fd is open. | |
1962 | */ | |
1963 | ||
1964 | if (pi->tid != 0) | |
1965 | pi = find_procinfo_or_die (pi->pid, 0); | |
1966 | ||
1967 | #ifdef NEW_PROC_API | |
1968 | if (!pi->status_valid) | |
1969 | if (!proc_get_status (pi)) | |
1970 | return NULL; | |
1971 | ||
1972 | ret = &pi->prstatus.pr_sysentry; | |
1973 | #else | |
1974 | { | |
1975 | static sysset_t sysentry; | |
c906108c | 1976 | |
c3f6f71d JM |
1977 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
1978 | ret = &sysentry; | |
1979 | } | |
1980 | #endif | |
1981 | if (save && ret) | |
1982 | memcpy (save, ret, sizeof (sysset_t)); | |
c906108c | 1983 | |
c3f6f71d JM |
1984 | return ret; |
1985 | } | |
c5aa993b | 1986 | |
c3f6f71d JM |
1987 | /* |
1988 | * Function: proc_get_traced_sysexit | |
1989 | * | |
1990 | * returns the set of syscalls that are traced /debugged on exit. | |
1991 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
1992 | */ |
1993 | ||
c3f6f71d | 1994 | sysset_t * |
fba45db2 | 1995 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1996 | { |
c3f6f71d JM |
1997 | sysset_t * ret = NULL; |
1998 | ||
1999 | /* | |
2000 | * We should never have to apply this operation to any procinfo | |
2001 | * except the one for the main process. If that ever changes | |
2002 | * for any reason, then take out the following clause and | |
2003 | * replace it with one that makes sure the ctl_fd is open. | |
2004 | */ | |
2005 | ||
2006 | if (pi->tid != 0) | |
2007 | pi = find_procinfo_or_die (pi->pid, 0); | |
2008 | ||
2009 | #ifdef NEW_PROC_API | |
2010 | if (!pi->status_valid) | |
2011 | if (!proc_get_status (pi)) | |
2012 | return NULL; | |
2013 | ||
2014 | ret = &pi->prstatus.pr_sysexit; | |
2015 | #else | |
2016 | { | |
2017 | static sysset_t sysexit; | |
c5aa993b | 2018 | |
c3f6f71d JM |
2019 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2020 | ret = &sysexit; | |
2021 | } | |
2022 | #endif | |
2023 | if (save && ret) | |
2024 | memcpy (save, ret, sizeof (sysset_t)); | |
2025 | ||
2026 | return ret; | |
2027 | } | |
c906108c | 2028 | |
c3f6f71d JM |
2029 | /* |
2030 | * Function: proc_clear_current_fault | |
2031 | * | |
2032 | * The current fault (if any) is cleared; the associated signal | |
2033 | * will not be sent to the process or LWP when it resumes. | |
2034 | * Returns non-zero for success, zero for failure. | |
2035 | */ | |
c906108c | 2036 | |
c3f6f71d | 2037 | int |
fba45db2 | 2038 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2039 | { |
2040 | int win; | |
2041 | ||
2042 | /* | |
2043 | * We should never have to apply this operation to any procinfo | |
2044 | * except the one for the main process. If that ever changes | |
2045 | * for any reason, then take out the following clause and | |
2046 | * replace it with one that makes sure the ctl_fd is open. | |
2047 | */ | |
2048 | ||
2049 | if (pi->tid != 0) | |
2050 | pi = find_procinfo_or_die (pi->pid, 0); | |
2051 | ||
2052 | #ifdef NEW_PROC_API | |
2053 | { | |
6c1a54b2 | 2054 | long cmd = PCCFAULT; |
c3f6f71d JM |
2055 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2056 | } | |
2057 | #else | |
2058 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2059 | #endif | |
2060 | ||
2061 | return win; | |
c906108c SS |
2062 | } |
2063 | ||
2064 | /* | |
c3f6f71d JM |
2065 | * Function: proc_set_current_signal |
2066 | * | |
2067 | * Set the "current signal" that will be delivered next to the process. | |
2068 | * NOTE: semantics are different from those of KILL. | |
2069 | * This signal will be delivered to the process or LWP | |
2070 | * immediately when it is resumed (even if the signal is held/blocked); | |
2071 | * it will NOT immediately cause another event of interest, and will NOT | |
2072 | * first trap back to the debugger. | |
2073 | * | |
2074 | * Returns non-zero for success, zero for failure. | |
2075 | */ | |
2076 | ||
2077 | int | |
fba45db2 | 2078 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2079 | { |
2080 | int win; | |
2081 | struct { | |
6c1a54b2 | 2082 | long cmd; |
c3f6f71d JM |
2083 | /* Use char array to avoid alignment issues. */ |
2084 | char sinfo[sizeof (struct siginfo)]; | |
2085 | } arg; | |
2086 | struct siginfo *mysinfo; | |
2087 | ||
2088 | /* | |
2089 | * We should never have to apply this operation to any procinfo | |
2090 | * except the one for the main process. If that ever changes | |
2091 | * for any reason, then take out the following clause and | |
2092 | * replace it with one that makes sure the ctl_fd is open. | |
2093 | */ | |
2094 | ||
2095 | if (pi->tid != 0) | |
2096 | pi = find_procinfo_or_die (pi->pid, 0); | |
2097 | ||
2098 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2099 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2100 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2101 | * it messes up the current signal. Work around the kernel bug. | |
2102 | */ | |
2103 | if (signo > 0 && | |
2104 | signo == proc_cursig (pi)) | |
2105 | return 1; /* I assume this is a success? */ | |
2106 | #endif | |
2107 | ||
2108 | /* The pointer is just a type alias. */ | |
2109 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2110 | mysinfo->si_signo = signo; | |
2111 | mysinfo->si_code = 0; | |
2112 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2113 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2114 | ||
2115 | #ifdef NEW_PROC_API | |
2116 | arg.cmd = PCSSIG; | |
2117 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2118 | #else | |
2119 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2120 | #endif | |
c906108c | 2121 | |
c3f6f71d JM |
2122 | return win; |
2123 | } | |
c906108c | 2124 | |
c3f6f71d JM |
2125 | /* |
2126 | * Function: proc_clear_current_signal | |
2127 | * | |
2128 | * The current signal (if any) is cleared, and | |
2129 | * is not sent to the process or LWP when it resumes. | |
2130 | * Returns non-zero for success, zero for failure. | |
2131 | */ | |
c906108c | 2132 | |
c3f6f71d | 2133 | int |
fba45db2 | 2134 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2135 | { |
2136 | int win; | |
2137 | ||
2138 | /* | |
2139 | * We should never have to apply this operation to any procinfo | |
2140 | * except the one for the main process. If that ever changes | |
2141 | * for any reason, then take out the following clause and | |
2142 | * replace it with one that makes sure the ctl_fd is open. | |
2143 | */ | |
2144 | ||
2145 | if (pi->tid != 0) | |
2146 | pi = find_procinfo_or_die (pi->pid, 0); | |
2147 | ||
2148 | #ifdef NEW_PROC_API | |
2149 | { | |
2150 | struct { | |
6c1a54b2 | 2151 | long cmd; |
c3f6f71d JM |
2152 | /* Use char array to avoid alignment issues. */ |
2153 | char sinfo[sizeof (struct siginfo)]; | |
2154 | } arg; | |
2155 | struct siginfo *mysinfo; | |
2156 | ||
2157 | arg.cmd = PCSSIG; | |
2158 | /* The pointer is just a type alias. */ | |
2159 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2160 | mysinfo->si_signo = 0; | |
2161 | mysinfo->si_code = 0; | |
2162 | mysinfo->si_errno = 0; | |
2163 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2164 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2165 | ||
2166 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2167 | } | |
2168 | #else | |
2169 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2170 | #endif | |
c906108c | 2171 | |
c3f6f71d JM |
2172 | return win; |
2173 | } | |
c906108c | 2174 | |
c3f6f71d JM |
2175 | /* |
2176 | * Function: proc_get_gregs | |
2177 | * | |
2178 | * Get the general registers for the process or LWP. | |
2179 | * Returns non-zero for success, zero for failure. | |
2180 | */ | |
c906108c | 2181 | |
c3f6f71d | 2182 | gdb_gregset_t * |
fba45db2 | 2183 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2184 | { |
2185 | if (!pi->status_valid || !pi->gregs_valid) | |
2186 | if (!proc_get_status (pi)) | |
2187 | return NULL; | |
2188 | ||
2189 | /* | |
2190 | * OK, sorry about the ifdef's. | |
2191 | * There's three cases instead of two, because | |
2192 | * in this instance Unixware and Solaris/RW differ. | |
2193 | */ | |
2194 | ||
2195 | #ifdef NEW_PROC_API | |
2196 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2197 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2198 | #else /* not Unixware */ | |
2199 | return &pi->prstatus.pr_lwp.pr_reg; | |
2200 | #endif /* Unixware */ | |
2201 | #else /* not NEW_PROC_API */ | |
2202 | return &pi->prstatus.pr_reg; | |
2203 | #endif /* NEW_PROC_API */ | |
2204 | } | |
c5aa993b | 2205 | |
c3f6f71d JM |
2206 | /* |
2207 | * Function: proc_get_fpregs | |
2208 | * | |
2209 | * Get the floating point registers for the process or LWP. | |
2210 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2211 | */ |
2212 | ||
c3f6f71d | 2213 | gdb_fpregset_t * |
fba45db2 | 2214 | proc_get_fpregs (procinfo *pi) |
c906108c | 2215 | { |
c3f6f71d JM |
2216 | #ifdef NEW_PROC_API |
2217 | if (!pi->status_valid || !pi->fpregs_valid) | |
2218 | if (!proc_get_status (pi)) | |
2219 | return NULL; | |
2220 | ||
2221 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2222 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2223 | #else | |
2224 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2225 | #endif /* Unixware */ | |
c5aa993b | 2226 | |
c3f6f71d JM |
2227 | #else /* not NEW_PROC_API */ |
2228 | if (pi->fpregs_valid) | |
2229 | return &pi->fpregset; /* already got 'em */ | |
2230 | else | |
c906108c | 2231 | { |
c3f6f71d JM |
2232 | if (pi->ctl_fd == 0 && |
2233 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2234 | { |
c3f6f71d | 2235 | return NULL; |
c906108c | 2236 | } |
c3f6f71d | 2237 | else |
c906108c | 2238 | { |
c3f6f71d JM |
2239 | #ifdef PIOCTGFPREG |
2240 | struct { | |
2241 | long pr_count; | |
2242 | tid_t pr_error_thread; | |
2243 | tfpregset_t thread_1; | |
2244 | } thread_fpregs; | |
2245 | ||
2246 | thread_fpregs.pr_count = 1; | |
2247 | thread_fpregs.thread_1.tid = pi->tid; | |
2248 | ||
2249 | if (pi->tid == 0 && | |
2250 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2251 | { | |
2252 | pi->fpregs_valid = 1; | |
2253 | return &pi->fpregset; /* got 'em now! */ | |
2254 | } | |
2255 | else if (pi->tid != 0 && | |
2256 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2257 | { | |
2258 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2259 | sizeof (pi->fpregset)); | |
2260 | pi->fpregs_valid = 1; | |
2261 | return &pi->fpregset; /* got 'em now! */ | |
2262 | } | |
2263 | else | |
2264 | { | |
2265 | return NULL; | |
2266 | } | |
2267 | #else | |
2268 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2269 | { | |
2270 | pi->fpregs_valid = 1; | |
2271 | return &pi->fpregset; /* got 'em now! */ | |
2272 | } | |
2273 | else | |
2274 | { | |
2275 | return NULL; | |
2276 | } | |
2277 | #endif | |
c906108c | 2278 | } |
c906108c | 2279 | } |
c3f6f71d | 2280 | #endif |
c906108c SS |
2281 | } |
2282 | ||
c3f6f71d JM |
2283 | /* |
2284 | * Function: proc_set_gregs | |
2285 | * | |
2286 | * Write the general registers back to the process or LWP. | |
2287 | * Returns non-zero for success, zero for failure. | |
2288 | */ | |
2289 | ||
2290 | int | |
fba45db2 | 2291 | proc_set_gregs (procinfo *pi) |
c906108c | 2292 | { |
c3f6f71d JM |
2293 | gdb_gregset_t *gregs; |
2294 | int win; | |
c5aa993b | 2295 | |
c3f6f71d JM |
2296 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2297 | return 0; /* get_regs has already warned */ | |
2298 | ||
2299 | if (pi->ctl_fd == 0 && | |
2300 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2301 | { |
c3f6f71d | 2302 | return 0; |
c906108c | 2303 | } |
c3f6f71d | 2304 | else |
c906108c | 2305 | { |
c3f6f71d JM |
2306 | #ifdef NEW_PROC_API |
2307 | struct { | |
6c1a54b2 | 2308 | long cmd; |
c3f6f71d JM |
2309 | /* Use char array to avoid alignment issues. */ |
2310 | char gregs[sizeof (gdb_gregset_t)]; | |
2311 | } arg; | |
2312 | ||
2313 | arg.cmd = PCSREG; | |
2314 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2315 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2316 | #else | |
2317 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2318 | #endif | |
c906108c | 2319 | } |
c3f6f71d JM |
2320 | |
2321 | /* Policy: writing the regs invalidates our cache. */ | |
2322 | pi->gregs_valid = 0; | |
2323 | return win; | |
c906108c SS |
2324 | } |
2325 | ||
c3f6f71d JM |
2326 | /* |
2327 | * Function: proc_set_fpregs | |
2328 | * | |
2329 | * Modify the floating point register set of the process or LWP. | |
2330 | * Returns non-zero for success, zero for failure. | |
2331 | */ | |
2332 | ||
2333 | int | |
fba45db2 | 2334 | proc_set_fpregs (procinfo *pi) |
c906108c | 2335 | { |
c3f6f71d JM |
2336 | gdb_fpregset_t *fpregs; |
2337 | int win; | |
2338 | ||
2339 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2340 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2341 | |
c3f6f71d JM |
2342 | if (pi->ctl_fd == 0 && |
2343 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2344 | { |
c3f6f71d | 2345 | return 0; |
c906108c | 2346 | } |
c3f6f71d | 2347 | else |
c906108c | 2348 | { |
c3f6f71d JM |
2349 | #ifdef NEW_PROC_API |
2350 | struct { | |
6c1a54b2 | 2351 | long cmd; |
c3f6f71d JM |
2352 | /* Use char array to avoid alignment issues. */ |
2353 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2354 | } arg; | |
2355 | ||
2356 | arg.cmd = PCSFPREG; | |
2357 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2358 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2359 | #else | |
2360 | #ifdef PIOCTSFPREG | |
2361 | if (pi->tid == 0) | |
2362 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2363 | else | |
2364 | { | |
2365 | struct { | |
2366 | long pr_count; | |
2367 | tid_t pr_error_thread; | |
2368 | tfpregset_t thread_1; | |
2369 | } thread_fpregs; | |
2370 | ||
2371 | thread_fpregs.pr_count = 1; | |
2372 | thread_fpregs.thread_1.tid = pi->tid; | |
2373 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2374 | sizeof (*fpregs)); | |
2375 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2376 | } | |
2377 | #else | |
2378 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2379 | #endif /* osf PIOCTSFPREG */ | |
2380 | #endif /* NEW_PROC_API */ | |
c906108c | 2381 | } |
c3f6f71d JM |
2382 | |
2383 | /* Policy: writing the regs invalidates our cache. */ | |
2384 | pi->fpregs_valid = 0; | |
2385 | return win; | |
c906108c SS |
2386 | } |
2387 | ||
2388 | /* | |
c3f6f71d JM |
2389 | * Function: proc_kill |
2390 | * | |
2391 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2392 | * Returns non-zero for success, zero for failure. | |
2393 | */ | |
c906108c | 2394 | |
c3f6f71d | 2395 | int |
fba45db2 | 2396 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2397 | { |
2398 | int win; | |
c906108c | 2399 | |
c3f6f71d JM |
2400 | /* |
2401 | * We might conceivably apply this operation to an LWP, and | |
2402 | * the LWP's ctl file descriptor might not be open. | |
2403 | */ | |
c906108c | 2404 | |
c3f6f71d JM |
2405 | if (pi->ctl_fd == 0 && |
2406 | open_procinfo_files (pi, FD_CTL) == 0) | |
2407 | { | |
2408 | return 0; | |
2409 | } | |
2410 | else | |
2411 | { | |
2412 | #ifdef NEW_PROC_API | |
6c1a54b2 | 2413 | long cmd[2]; |
c906108c | 2414 | |
c3f6f71d JM |
2415 | cmd[0] = PCKILL; |
2416 | cmd[1] = signo; | |
2417 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2418 | #else /* ioctl method */ | |
2419 | /* FIXME: do I need the Alpha OSF fixups present in | |
2420 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2421 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2422 | #endif | |
2423 | } | |
c906108c | 2424 | |
c3f6f71d JM |
2425 | return win; |
2426 | } | |
c906108c | 2427 | |
c3f6f71d JM |
2428 | /* |
2429 | * Function: proc_parent_pid | |
2430 | * | |
2431 | * Find the pid of the process that started this one. | |
2432 | * Returns the parent process pid, or zero. | |
c906108c SS |
2433 | */ |
2434 | ||
c3f6f71d | 2435 | int |
fba45db2 | 2436 | proc_parent_pid (procinfo *pi) |
c906108c | 2437 | { |
c3f6f71d JM |
2438 | /* |
2439 | * We should never have to apply this operation to any procinfo | |
2440 | * except the one for the main process. If that ever changes | |
2441 | * for any reason, then take out the following clause and | |
2442 | * replace it with one that makes sure the ctl_fd is open. | |
2443 | */ | |
2444 | ||
2445 | if (pi->tid != 0) | |
2446 | pi = find_procinfo_or_die (pi->pid, 0); | |
2447 | ||
2448 | if (!pi->status_valid) | |
2449 | if (!proc_get_status (pi)) | |
2450 | return 0; | |
c5aa993b | 2451 | |
c3f6f71d JM |
2452 | return pi->prstatus.pr_ppid; |
2453 | } | |
2454 | ||
2455 | ||
2456 | /* | |
2457 | * Function: proc_set_watchpoint | |
2458 | * | |
2459 | */ | |
2460 | ||
2461 | int | |
fba45db2 | 2462 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d JM |
2463 | { |
2464 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2465 | return 0; | |
2466 | #else | |
2467 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2468 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2469 | return 0; | |
2470 | #else | |
2471 | struct { | |
6c1a54b2 | 2472 | long cmd; |
c3f6f71d JM |
2473 | char watch[sizeof (prwatch_t)]; |
2474 | } arg; | |
2475 | prwatch_t *pwatch; | |
2476 | ||
2477 | pwatch = (prwatch_t *) &arg.watch; | |
ac2e2ef7 | 2478 | pwatch->pr_vaddr = address_to_host_pointer (addr); |
c3f6f71d JM |
2479 | pwatch->pr_size = len; |
2480 | pwatch->pr_wflags = wflags; | |
2481 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2482 | arg.cmd = PCWATCH; | |
2483 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2484 | #else | |
2485 | #if defined (PIOCSWATCH) | |
2486 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2487 | #else | |
2488 | return 0; /* Fail */ | |
2489 | #endif | |
2490 | #endif | |
2491 | #endif | |
2492 | #endif | |
c906108c SS |
2493 | } |
2494 | ||
2495 | /* | |
c3f6f71d JM |
2496 | * Function: proc_iterate_over_mappings |
2497 | * | |
2498 | * Given a pointer to a function, call that function once for every | |
2499 | * mapped address space in the process. The callback function | |
2500 | * receives an open file descriptor for the file corresponding to | |
2501 | * that mapped address space (if there is one), and the base address | |
2502 | * of the mapped space. Quit when the callback function returns a | |
2503 | * nonzero value, or at teh end of the mappings. | |
2504 | * | |
2505 | * Returns: the first non-zero return value of the callback function, | |
2506 | * or zero. | |
2507 | */ | |
c906108c | 2508 | |
c3f6f71d JM |
2509 | /* FIXME: it's probably a waste to cache this FD. |
2510 | It doesn't get called that often... and if I open it | |
2511 | every time, I don't need to lseek it. */ | |
2512 | int | |
d0849a9a | 2513 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) |
c3f6f71d JM |
2514 | { |
2515 | struct prmap *map; | |
2516 | procinfo *pi; | |
0d06e24b | 2517 | #ifndef NEW_PROC_API /* avoid compiler warning */ |
0fda6bd2 JM |
2518 | int nmaps = 0; |
2519 | int i; | |
2520 | #else | |
2521 | int map_fd; | |
2522 | char pathname[MAX_PROC_NAME_SIZE]; | |
0d06e24b | 2523 | #endif |
c3f6f71d | 2524 | int funcstat = 0; |
0fda6bd2 | 2525 | int fd; |
c906108c | 2526 | |
c3f6f71d | 2527 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); |
c906108c | 2528 | |
c3f6f71d JM |
2529 | #ifdef NEW_PROC_API |
2530 | /* Open map fd. */ | |
2531 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
2532 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
2533 | proc_error (pi, "proc_iterate_over_mappings (open)", __LINE__); | |
c906108c | 2534 | |
c3f6f71d | 2535 | /* Make sure it gets closed again. */ |
004527cb | 2536 | make_cleanup_close (map_fd); |
c906108c | 2537 | |
c3f6f71d JM |
2538 | /* Allocate space for mapping (lifetime only for this function). */ |
2539 | map = alloca (sizeof (struct prmap)); | |
c906108c | 2540 | |
c3f6f71d JM |
2541 | /* Now read the mappings from the file, |
2542 | open a file descriptor for those that have a name, | |
2543 | and call the callback function. */ | |
2544 | while (read (map_fd, | |
2545 | (void *) map, | |
2546 | sizeof (struct prmap)) == sizeof (struct prmap)) | |
2547 | { | |
2548 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
c906108c | 2549 | |
c3f6f71d JM |
2550 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
2551 | break; /* sanity */ | |
c906108c | 2552 | |
c3f6f71d JM |
2553 | if (map->pr_mapname[0] == 0) |
2554 | { | |
2555 | fd = -1; /* no map file */ | |
2556 | } | |
2557 | else | |
2558 | { | |
2559 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
2560 | /* Note: caller's responsibility to close this fd! */ | |
2561 | fd = open (name, O_RDONLY); | |
2562 | /* Note: we don't test the above call for failure; | |
2563 | we just pass the FD on as given. Sometimes there is | |
2564 | no file, so the ioctl may return failure, but that's | |
2565 | not a problem. */ | |
2566 | } | |
c906108c | 2567 | |
c3f6f71d JM |
2568 | /* Stop looping if the callback returns non-zero. */ |
2569 | if ((funcstat = (*func) (fd, (CORE_ADDR) map->pr_vaddr)) != 0) | |
2570 | break; | |
2571 | } | |
2572 | #else | |
2573 | /* Get the number of mapping entries. */ | |
2574 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmaps) < 0) | |
2575 | proc_error (pi, "proc_iterate_over_mappings (PIOCNMAP)", __LINE__); | |
2576 | ||
2577 | /* Allocate space for mappings (lifetime only this function). */ | |
2578 | map = (struct prmap *) alloca ((nmaps + 1) * sizeof (struct prmap)); | |
2579 | ||
2580 | /* Read in all the mappings. */ | |
2581 | if (ioctl (pi->ctl_fd, PIOCMAP, map) < 0) | |
2582 | proc_error (pi, "proc_iterate_over_mappings (PIOCMAP)", __LINE__); | |
2583 | ||
2584 | /* Now loop through the mappings, open an fd for each, and | |
2585 | call the callback function. */ | |
2586 | for (i = 0; | |
2587 | i < nmaps && map[i].pr_size != 0; | |
2588 | i++) | |
2589 | { | |
2590 | /* Note: caller's responsibility to close this fd! */ | |
2591 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map[i].pr_vaddr); | |
2592 | /* Note: we don't test the above call for failure; | |
2593 | we just pass the FD on as given. Sometimes there is | |
2594 | no file, so the ioctl may return failure, but that's | |
2595 | not a problem. */ | |
2596 | ||
2597 | /* Stop looping if the callback returns non-zero. */ | |
ac2e2ef7 AC |
2598 | funcstat = (*func) (fd, host_pointer_to_address (map[i].pr_vaddr)); |
2599 | if (funcstat != 0) | |
c3f6f71d JM |
2600 | break; |
2601 | } | |
c906108c | 2602 | #endif |
c906108c | 2603 | |
c3f6f71d JM |
2604 | return funcstat; |
2605 | } | |
c906108c | 2606 | |
c3f6f71d | 2607 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2608 | |
c3f6f71d | 2609 | #include <sys/sysi86.h> |
c906108c | 2610 | |
c3f6f71d JM |
2611 | /* |
2612 | * Function: proc_get_LDT_entry | |
2613 | * | |
2614 | * Inputs: | |
2615 | * procinfo *pi; | |
2616 | * int key; | |
2617 | * | |
2618 | * The 'key' is actually the value of the lower 16 bits of | |
2619 | * the GS register for the LWP that we're interested in. | |
2620 | * | |
2621 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2622 | */ |
2623 | ||
c3f6f71d | 2624 | struct ssd * |
fba45db2 | 2625 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2626 | { |
c3f6f71d JM |
2627 | static struct ssd *ldt_entry = NULL; |
2628 | #ifdef NEW_PROC_API | |
2629 | char pathname[MAX_PROC_NAME_SIZE]; | |
2630 | struct cleanup *old_chain = NULL; | |
2631 | int fd; | |
2632 | ||
2633 | /* Allocate space for one LDT entry. | |
2634 | This alloc must persist, because we return a pointer to it. */ | |
2635 | if (ldt_entry == NULL) | |
2636 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2637 | ||
2638 | /* Open the file descriptor for the LDT table. */ | |
2639 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
2640 | if ((fd = open (pathname, O_RDONLY)) < 0) | |
c906108c | 2641 | { |
c3f6f71d JM |
2642 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2643 | return NULL; | |
c906108c | 2644 | } |
c3f6f71d | 2645 | /* Make sure it gets closed again! */ |
004527cb | 2646 | old_chain = make_cleanup_close (fd); |
c906108c | 2647 | |
c3f6f71d JM |
2648 | /* Now 'read' thru the table, find a match and return it. */ |
2649 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2650 | { |
c3f6f71d JM |
2651 | if (ldt_entry->sel == 0 && |
2652 | ldt_entry->bo == 0 && | |
2653 | ldt_entry->acc1 == 0 && | |
2654 | ldt_entry->acc2 == 0) | |
2655 | break; /* end of table */ | |
2656 | /* If key matches, return this entry. */ | |
2657 | if (ldt_entry->sel == key) | |
2658 | return ldt_entry; | |
c906108c | 2659 | } |
c3f6f71d JM |
2660 | /* Loop ended, match not found. */ |
2661 | return NULL; | |
2662 | #else | |
2663 | int nldt, i; | |
2664 | static int nalloc = 0; | |
c906108c | 2665 | |
c3f6f71d JM |
2666 | /* Get the number of LDT entries. */ |
2667 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2668 | { |
c3f6f71d JM |
2669 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2670 | return NULL; | |
c906108c SS |
2671 | } |
2672 | ||
c3f6f71d JM |
2673 | /* Allocate space for the number of LDT entries. */ |
2674 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2675 | if (nldt > nalloc) | |
c906108c | 2676 | { |
c3f6f71d JM |
2677 | ldt_entry = (struct ssd *) |
2678 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
2679 | nalloc = nldt; | |
2680 | } | |
2681 | ||
2682 | /* Read the whole table in one gulp. */ | |
2683 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2684 | { | |
2685 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2686 | return NULL; | |
c906108c SS |
2687 | } |
2688 | ||
c3f6f71d JM |
2689 | /* Search the table and return the (first) entry matching 'key'. */ |
2690 | for (i = 0; i < nldt; i++) | |
2691 | if (ldt_entry[i].sel == key) | |
2692 | return &ldt_entry[i]; | |
c906108c | 2693 | |
c3f6f71d JM |
2694 | /* Loop ended, match not found. */ |
2695 | return NULL; | |
2696 | #endif | |
2697 | } | |
c906108c | 2698 | |
c3f6f71d | 2699 | #endif /* TM_I386SOL2_H */ |
c906108c | 2700 | |
c3f6f71d | 2701 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2702 | |
c3f6f71d | 2703 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2704 | |
c3f6f71d JM |
2705 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2706 | since there is a different way to do threads on every OS. */ | |
c906108c | 2707 | |
c3f6f71d JM |
2708 | /* |
2709 | * Function: proc_get_nthreads | |
2710 | * | |
2711 | * Return the number of threads for the process | |
2712 | */ | |
c906108c | 2713 | |
c3f6f71d JM |
2714 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
2715 | /* | |
2716 | * OSF version | |
2717 | */ | |
2718 | int | |
fba45db2 | 2719 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2720 | { |
2721 | int nthreads = 0; | |
c906108c | 2722 | |
c3f6f71d JM |
2723 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2724 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2725 | |
c3f6f71d | 2726 | return nthreads; |
c906108c SS |
2727 | } |
2728 | ||
c3f6f71d JM |
2729 | #else |
2730 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2731 | /* | |
2732 | * Solaris and Unixware version | |
2733 | */ | |
2734 | int | |
fba45db2 | 2735 | proc_get_nthreads (procinfo *pi) |
c906108c | 2736 | { |
c3f6f71d JM |
2737 | if (!pi->status_valid) |
2738 | if (!proc_get_status (pi)) | |
2739 | return 0; | |
c5aa993b | 2740 | |
c3f6f71d JM |
2741 | /* |
2742 | * NEW_PROC_API: only works for the process procinfo, | |
2743 | * because the LWP procinfos do not get prstatus filled in. | |
2744 | */ | |
2745 | #ifdef NEW_PROC_API | |
2746 | if (pi->tid != 0) /* find the parent process procinfo */ | |
2747 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 2748 | #endif |
c3f6f71d | 2749 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2750 | } |
2751 | ||
c3f6f71d JM |
2752 | #else |
2753 | /* | |
2754 | * Default version | |
2755 | */ | |
2756 | int | |
fba45db2 | 2757 | proc_get_nthreads (procinfo *pi) |
c906108c | 2758 | { |
c3f6f71d JM |
2759 | return 0; |
2760 | } | |
2761 | #endif | |
2762 | #endif | |
2763 | ||
2764 | /* | |
2765 | * Function: proc_get_current_thread (LWP version) | |
2766 | * | |
2767 | * Return the ID of the thread that had an event of interest. | |
2768 | * (ie. the one that hit a breakpoint or other traced event). | |
2769 | * All other things being equal, this should be the ID of a | |
2770 | * thread that is currently executing. | |
2771 | */ | |
2772 | ||
2773 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2774 | /* | |
2775 | * Solaris and Unixware version | |
2776 | */ | |
2777 | int | |
fba45db2 | 2778 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
2779 | { |
2780 | /* | |
2781 | * Note: this should be applied to the root procinfo for the process, | |
2782 | * not to the procinfo for an LWP. If applied to the procinfo for | |
2783 | * an LWP, it will simply return that LWP's ID. In that case, | |
2784 | * find the parent process procinfo. | |
2785 | */ | |
2786 | ||
2787 | if (pi->tid != 0) | |
2788 | pi = find_procinfo_or_die (pi->pid, 0); | |
2789 | ||
2790 | if (!pi->status_valid) | |
2791 | if (!proc_get_status (pi)) | |
2792 | return 0; | |
2793 | ||
2794 | #ifdef NEW_PROC_API | |
2795 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2796 | #else |
c3f6f71d | 2797 | return pi->prstatus.pr_who; |
c906108c | 2798 | #endif |
c3f6f71d | 2799 | } |
c906108c | 2800 | |
c3f6f71d JM |
2801 | #else |
2802 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
2803 | /* | |
2804 | * OSF version | |
2805 | */ | |
2806 | int | |
fba45db2 | 2807 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
2808 | { |
2809 | #if 0 /* FIXME: not ready for prime time? */ | |
2810 | return pi->prstatus.pr_tid; | |
2811 | #else | |
2812 | return 0; | |
2813 | #endif | |
c906108c SS |
2814 | } |
2815 | ||
c3f6f71d JM |
2816 | #else |
2817 | /* | |
2818 | * Default version | |
2819 | */ | |
2820 | int | |
fba45db2 | 2821 | proc_get_current_thread (procinfo *pi) |
c906108c | 2822 | { |
c3f6f71d JM |
2823 | return 0; |
2824 | } | |
2825 | ||
2826 | #endif | |
2827 | #endif | |
c906108c | 2828 | |
c3f6f71d JM |
2829 | /* |
2830 | * Function: proc_update_threads | |
2831 | * | |
2832 | * Discover the IDs of all the threads within the process, and | |
2833 | * create a procinfo for each of them (chained to the parent). | |
2834 | * | |
2835 | * This unfortunately requires a different method on every OS. | |
2836 | * | |
2837 | * Return: non-zero for success, zero for failure. | |
2838 | */ | |
c906108c | 2839 | |
c3f6f71d | 2840 | int |
fba45db2 | 2841 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2842 | { |
2843 | if (thread && parent) /* sanity */ | |
c906108c | 2844 | { |
c3f6f71d JM |
2845 | thread->status_valid = 0; |
2846 | if (!proc_get_status (thread)) | |
2847 | destroy_one_procinfo (&parent->thread_list, thread); | |
2848 | } | |
2849 | return 0; /* keep iterating */ | |
2850 | } | |
c5aa993b | 2851 | |
c3f6f71d JM |
2852 | #if defined (PIOCLSTATUS) |
2853 | /* | |
2854 | * Solaris 2.5 (ioctl) version | |
2855 | */ | |
2856 | int | |
fba45db2 | 2857 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2858 | { |
2859 | gdb_prstatus_t *prstatus; | |
2860 | struct cleanup *old_chain = NULL; | |
2861 | procinfo *thread; | |
2862 | int nlwp, i; | |
2863 | ||
2864 | /* | |
2865 | * We should never have to apply this operation to any procinfo | |
2866 | * except the one for the main process. If that ever changes | |
2867 | * for any reason, then take out the following clause and | |
2868 | * replace it with one that makes sure the ctl_fd is open. | |
2869 | */ | |
2870 | ||
2871 | if (pi->tid != 0) | |
2872 | pi = find_procinfo_or_die (pi->pid, 0); | |
2873 | ||
2874 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2875 | ||
2876 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2877 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2878 | ||
2879 | if ((prstatus = (gdb_prstatus_t *) | |
2880 | malloc (sizeof (gdb_prstatus_t) * (nlwp + 1))) == 0) | |
2881 | perror_with_name ("procfs: malloc failed in update_threads"); | |
2882 | ||
b8c9b27d | 2883 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2884 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2885 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2886 | ||
2887 | /* Skip element zero, which represents the process as a whole. */ | |
2888 | for (i = 1; i < nlwp + 1; i++) | |
2889 | { | |
2890 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2891 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2892 | |
c3f6f71d JM |
2893 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2894 | thread->status_valid = 1; | |
2895 | } | |
2896 | pi->threads_valid = 1; | |
2897 | do_cleanups (old_chain); | |
2898 | return 1; | |
2899 | } | |
2900 | #else | |
2901 | #ifdef NEW_PROC_API | |
2902 | /* | |
2903 | * Unixware and Solaris 6 (and later) version | |
2904 | */ | |
004527cb AC |
2905 | static void |
2906 | do_closedir_cleanup (void *dir) | |
2907 | { | |
2908 | closedir (dir); | |
2909 | } | |
2910 | ||
c3f6f71d | 2911 | int |
fba45db2 | 2912 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2913 | { |
2914 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
2915 | struct dirent *direntry; | |
2916 | struct cleanup *old_chain = NULL; | |
2917 | procinfo *thread; | |
2918 | DIR *dirp; | |
2919 | int lwpid; | |
2920 | ||
2921 | /* | |
2922 | * We should never have to apply this operation to any procinfo | |
2923 | * except the one for the main process. If that ever changes | |
2924 | * for any reason, then take out the following clause and | |
2925 | * replace it with one that makes sure the ctl_fd is open. | |
2926 | */ | |
2927 | ||
2928 | if (pi->tid != 0) | |
2929 | pi = find_procinfo_or_die (pi->pid, 0); | |
2930 | ||
2931 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2932 | ||
2933 | /* | |
2934 | * Unixware | |
2935 | * | |
2936 | * Note: this brute-force method is the only way I know of | |
2937 | * to accomplish this task on Unixware. This method will | |
2938 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
2939 | * and more elegant way to do this on Solaris, but the margins | |
2940 | * of this manuscript are too small to write it here... ;-) | |
2941 | */ | |
2942 | ||
2943 | strcpy (pathname, pi->pathname); | |
2944 | strcat (pathname, "/lwp"); | |
2945 | if ((dirp = opendir (pathname)) == NULL) | |
2946 | proc_error (pi, "update_threads, opendir", __LINE__); | |
2947 | ||
004527cb | 2948 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
2949 | while ((direntry = readdir (dirp)) != NULL) |
2950 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
2951 | { | |
2952 | lwpid = atoi (&direntry->d_name[0]); | |
2953 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
2954 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
2955 | } | |
2956 | pi->threads_valid = 1; | |
2957 | do_cleanups (old_chain); | |
2958 | return 1; | |
2959 | } | |
2960 | #else | |
2961 | #ifdef PIOCTLIST | |
2962 | /* | |
2963 | * OSF version | |
2964 | */ | |
2965 | int | |
fba45db2 | 2966 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2967 | { |
2968 | int nthreads, i; | |
2969 | tid_t *threads; | |
2970 | ||
2971 | /* | |
2972 | * We should never have to apply this operation to any procinfo | |
2973 | * except the one for the main process. If that ever changes | |
2974 | * for any reason, then take out the following clause and | |
2975 | * replace it with one that makes sure the ctl_fd is open. | |
2976 | */ | |
2977 | ||
2978 | if (pi->tid != 0) | |
2979 | pi = find_procinfo_or_die (pi->pid, 0); | |
2980 | ||
2981 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2982 | ||
2983 | nthreads = proc_get_nthreads (pi); | |
2984 | if (nthreads < 2) | |
2985 | return 0; /* nothing to do for 1 or fewer threads */ | |
2986 | ||
2987 | if ((threads = malloc (nthreads * sizeof (tid_t))) == NULL) | |
2988 | proc_error (pi, "update_threads, malloc", __LINE__); | |
2989 | ||
2990 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
2991 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
2992 | ||
2993 | for (i = 0; i < nthreads; i++) | |
2994 | { | |
2995 | if (!find_procinfo (pi->pid, threads[i])) | |
2996 | if (!create_procinfo (pi->pid, threads[i])) | |
2997 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 2998 | } |
c3f6f71d JM |
2999 | pi->threads_valid = 1; |
3000 | return 1; | |
c906108c | 3001 | } |
c3f6f71d JM |
3002 | #else |
3003 | /* | |
3004 | * Default version | |
3005 | */ | |
3006 | int | |
fba45db2 | 3007 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3008 | { |
3009 | return 0; | |
3010 | } | |
3011 | #endif /* OSF PIOCTLIST */ | |
3012 | #endif /* NEW_PROC_API */ | |
3013 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3014 | |
c3f6f71d JM |
3015 | /* |
3016 | * Function: proc_iterate_over_threads | |
3017 | * | |
3018 | * Description: | |
3019 | * Given a pointer to a function, call that function once | |
3020 | * for each lwp in the procinfo list, until the function | |
3021 | * returns non-zero, in which event return the value | |
3022 | * returned by the function. | |
3023 | * | |
3024 | * Note: this function does NOT call update_threads. | |
3025 | * If you want to discover new threads first, you must | |
3026 | * call that function explicitly. This function just makes | |
3027 | * a quick pass over the currently-known procinfos. | |
3028 | * | |
3029 | * Arguments: | |
3030 | * pi - parent process procinfo | |
3031 | * func - per-thread function | |
3032 | * ptr - opaque parameter for function. | |
3033 | * | |
3034 | * Return: | |
3035 | * First non-zero return value from the callee, or zero. | |
3036 | */ | |
3037 | ||
3038 | int | |
d0849a9a KB |
3039 | proc_iterate_over_threads (procinfo *pi, |
3040 | int (*func) (procinfo *, procinfo *, void *), | |
3041 | void *ptr) | |
c906108c | 3042 | { |
c3f6f71d JM |
3043 | procinfo *thread, *next; |
3044 | int retval = 0; | |
c906108c | 3045 | |
c3f6f71d JM |
3046 | /* |
3047 | * We should never have to apply this operation to any procinfo | |
3048 | * except the one for the main process. If that ever changes | |
3049 | * for any reason, then take out the following clause and | |
3050 | * replace it with one that makes sure the ctl_fd is open. | |
3051 | */ | |
3052 | ||
3053 | if (pi->tid != 0) | |
3054 | pi = find_procinfo_or_die (pi->pid, 0); | |
3055 | ||
3056 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3057 | { |
c3f6f71d JM |
3058 | next = thread->next; /* in case thread is destroyed */ |
3059 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3060 | break; | |
c906108c | 3061 | } |
c3f6f71d JM |
3062 | |
3063 | return retval; | |
c906108c SS |
3064 | } |
3065 | ||
c3f6f71d JM |
3066 | /* =================== END, Thread "MODULE" =================== */ |
3067 | ||
3068 | /* =================== END, /proc "MODULE" =================== */ | |
3069 | ||
3070 | /* =================== GDB "MODULE" =================== */ | |
3071 | ||
3072 | /* | |
3073 | * Here are all of the gdb target vector functions and their friends. | |
3074 | */ | |
3075 | ||
a14ed312 KB |
3076 | static int do_attach (int pid); |
3077 | static void do_detach (int signo); | |
3078 | static int register_gdb_signals (procinfo *, sigset_t *); | |
c3f6f71d JM |
3079 | |
3080 | /* | |
3081 | * Function: procfs_debug_inferior | |
3082 | * | |
3083 | * Sets up the inferior to be debugged. | |
3084 | * Registers to trace signals, hardware faults, and syscalls. | |
3085 | * Note: does not set RLC flag: caller may want to customize that. | |
3086 | * | |
3087 | * Returns: zero for success (note! unlike most functions in this module) | |
3088 | * On failure, returns the LINE NUMBER where it failed! | |
3089 | */ | |
3090 | ||
3091 | static int | |
fba45db2 | 3092 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3093 | { |
c3f6f71d JM |
3094 | fltset_t traced_faults; |
3095 | sigset_t traced_signals; | |
3096 | sysset_t traced_syscall_entries; | |
3097 | sysset_t traced_syscall_exits; | |
c906108c | 3098 | |
c3f6f71d JM |
3099 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3100 | /* On some systems (OSF), we don't trace hardware faults. | |
3101 | Apparently it's enough that we catch them as signals. | |
3102 | Wonder why we don't just do that in general? */ | |
3103 | premptyset (&traced_faults); /* don't trace faults. */ | |
3104 | #else | |
3105 | /* Register to trace hardware faults in the child. */ | |
3106 | prfillset (&traced_faults); /* trace all faults... */ | |
3107 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3108 | #endif | |
3109 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3110 | return __LINE__; | |
c906108c | 3111 | |
c3f6f71d JM |
3112 | /* Register to trace selected signals in the child. */ |
3113 | premptyset (&traced_signals); | |
3114 | if (!register_gdb_signals (pi, &traced_signals)) | |
3115 | return __LINE__; | |
3116 | ||
3117 | /* Register to trace the 'exit' system call (on entry). */ | |
3118 | premptyset (&traced_syscall_entries); | |
3119 | praddset (&traced_syscall_entries, SYS_exit); | |
3120 | #ifdef SYS_lwpexit | |
3121 | praddset (&traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ | |
3122 | #endif | |
3123 | #ifdef SYS_lwp_exit | |
3124 | praddset (&traced_syscall_entries, SYS_lwp_exit); | |
c906108c SS |
3125 | #endif |
3126 | ||
c3f6f71d JM |
3127 | if (!proc_set_traced_sysentry (pi, &traced_syscall_entries)) |
3128 | return __LINE__; | |
3129 | ||
3130 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3131 | /* OSF method for tracing exec syscalls. Quoting: | |
3132 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3133 | exits from exec system calls because of the user level loader. */ | |
3134 | /* FIXME: make nice and maybe move into an access function. */ | |
3135 | { | |
3136 | int prfs_flags; | |
3137 | ||
3138 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3139 | return __LINE__; | |
3140 | ||
3141 | prfs_flags |= PRFS_STOPEXEC; | |
3142 | ||
3143 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3144 | return __LINE__; | |
3145 | } | |
3146 | #else /* not PRFS_STOPEXEC */ | |
3147 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3148 | /* GW: Rationale... | |
3149 | Not all systems with /proc have all the exec* syscalls with the same | |
3150 | names. On the SGI, for example, there is no SYS_exec, but there | |
3151 | *is* a SYS_execv. So, we try to account for that. */ | |
3152 | ||
3153 | premptyset (&traced_syscall_exits); | |
3154 | #ifdef SYS_exec | |
3155 | praddset (&traced_syscall_exits, SYS_exec); | |
3156 | #endif | |
3157 | #ifdef SYS_execve | |
3158 | praddset (&traced_syscall_exits, SYS_execve); | |
3159 | #endif | |
3160 | #ifdef SYS_execv | |
3161 | praddset (&traced_syscall_exits, SYS_execv); | |
3162 | #endif | |
c5aa993b | 3163 | |
c3f6f71d JM |
3164 | #ifdef SYS_lwpcreate |
3165 | praddset (&traced_syscall_exits, SYS_lwpcreate); | |
3166 | praddset (&traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3167 | #endif |
c5aa993b | 3168 | |
c3f6f71d JM |
3169 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
3170 | praddset (&traced_syscall_exits, SYS_lwp_create); | |
3171 | praddset (&traced_syscall_exits, SYS_lwp_exit); | |
3172 | #endif | |
c5aa993b | 3173 | |
c906108c | 3174 | |
c3f6f71d JM |
3175 | if (!proc_set_traced_sysexit (pi, &traced_syscall_exits)) |
3176 | return __LINE__; | |
3177 | ||
3178 | #endif /* PRFS_STOPEXEC */ | |
3179 | return 0; | |
c906108c SS |
3180 | } |
3181 | ||
c3f6f71d | 3182 | static void |
fba45db2 | 3183 | procfs_attach (char *args, int from_tty) |
c906108c | 3184 | { |
c3f6f71d JM |
3185 | char *exec_file; |
3186 | int pid; | |
3187 | ||
3188 | if (!args) | |
3189 | error_no_arg ("process-id to attach"); | |
3190 | ||
3191 | pid = atoi (args); | |
3192 | if (pid == getpid ()) | |
3193 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3194 | |
c3f6f71d | 3195 | if (from_tty) |
c906108c | 3196 | { |
c3f6f71d JM |
3197 | exec_file = get_exec_file (0); |
3198 | ||
3199 | if (exec_file) | |
3200 | printf_filtered ("Attaching to program `%s', %s\n", | |
3201 | exec_file, target_pid_to_str (pid)); | |
3202 | else | |
3203 | printf_filtered ("Attaching to %s\n", target_pid_to_str (pid)); | |
3204 | ||
3205 | fflush (stdout); | |
c906108c | 3206 | } |
c3f6f71d JM |
3207 | inferior_pid = do_attach (pid); |
3208 | push_target (&procfs_ops); | |
3209 | } | |
3210 | ||
3211 | static void | |
fba45db2 | 3212 | procfs_detach (char *args, int from_tty) |
c3f6f71d JM |
3213 | { |
3214 | char *exec_file; | |
3215 | int signo = 0; | |
3216 | ||
3217 | if (from_tty) | |
c906108c | 3218 | { |
c3f6f71d JM |
3219 | exec_file = get_exec_file (0); |
3220 | if (exec_file == 0) | |
3221 | exec_file = ""; | |
3222 | printf_filtered ("Detaching from program: %s %s\n", | |
3223 | exec_file, target_pid_to_str (inferior_pid)); | |
3224 | fflush (stdout); | |
c906108c | 3225 | } |
c3f6f71d JM |
3226 | if (args) |
3227 | signo = atoi (args); | |
3228 | ||
3229 | do_detach (signo); | |
3230 | inferior_pid = 0; | |
3231 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ | |
c906108c SS |
3232 | } |
3233 | ||
c3f6f71d | 3234 | static int |
fba45db2 | 3235 | do_attach (int pid) |
c906108c | 3236 | { |
c3f6f71d JM |
3237 | procinfo *pi; |
3238 | int fail; | |
3239 | ||
3240 | if ((pi = create_procinfo (pid, 0)) == NULL) | |
3241 | perror ("procfs: out of memory in 'attach'"); | |
3242 | ||
3243 | if (!open_procinfo_files (pi, FD_CTL)) | |
3244 | { | |
3245 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3246 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
3247 | pid); | |
3248 | dead_procinfo (pi, errmsg, NOKILL); | |
3249 | } | |
c906108c | 3250 | |
c3f6f71d JM |
3251 | /* Stop the process (if it isn't already stopped). */ |
3252 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3253 | { |
c3f6f71d JM |
3254 | pi->was_stopped = 1; |
3255 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3256 | } |
3257 | else | |
3258 | { | |
c3f6f71d JM |
3259 | pi->was_stopped = 0; |
3260 | /* Set the process to run again when we close it. */ | |
3261 | if (!proc_set_run_on_last_close (pi)) | |
3262 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3263 | ||
3264 | /* Now stop the process. */ | |
3265 | if (!proc_stop_process (pi)) | |
3266 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3267 | pi->ignore_next_sigstop = 1; | |
c906108c | 3268 | } |
c3f6f71d JM |
3269 | /* Save some of the /proc state to be restored if we detach. */ |
3270 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3271 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3272 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3273 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
3274 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
3275 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", | |
3276 | NOKILL); | |
3277 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
3278 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", | |
3279 | NOKILL); | |
3280 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3281 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3282 | ||
3283 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3284 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3285 | ||
3286 | /* Let GDB know that the inferior was attached. */ | |
3287 | attach_flag = 1; | |
3288 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3289 | } |
3290 | ||
3291 | static void | |
fba45db2 | 3292 | do_detach (int signo) |
c906108c | 3293 | { |
c3f6f71d | 3294 | procinfo *pi; |
c906108c | 3295 | |
c3f6f71d JM |
3296 | /* Find procinfo for the main process */ |
3297 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); /* FIXME: threads */ | |
3298 | if (signo) | |
3299 | if (!proc_set_current_signal (pi, signo)) | |
3300 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3301 | |
c3f6f71d JM |
3302 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3303 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3304 | |
c3f6f71d JM |
3305 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3306 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3307 | ||
3308 | if (!proc_set_traced_sysentry (pi, &pi->saved_entryset)) | |
3309 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); | |
3310 | ||
3311 | if (!proc_set_traced_sysexit (pi, &pi->saved_exitset)) | |
3312 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); | |
3313 | ||
3314 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3315 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3316 | ||
3317 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3318 | if (signo || !(pi->was_stopped) || | |
3319 | query ("Was stopped when attached, make it runnable again? ")) | |
3320 | { | |
3321 | /* Clear any pending signal. */ | |
3322 | if (!proc_clear_current_fault (pi)) | |
3323 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3324 | ||
3325 | if (!proc_set_run_on_last_close (pi)) | |
3326 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3327 | } | |
3328 | ||
3329 | attach_flag = 0; | |
3330 | destroy_procinfo (pi); | |
c906108c SS |
3331 | } |
3332 | ||
c3f6f71d JM |
3333 | /* |
3334 | * fetch_registers | |
3335 | * | |
3336 | * Since the /proc interface cannot give us individual registers, | |
3337 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3338 | * This results in the possibility that we will do unnecessarily many | |
3339 | * fetches, since we may be called repeatedly for individual registers. | |
3340 | * So we cache the results, and mark the cache invalid when the process | |
3341 | * is resumed. | |
3342 | */ | |
3343 | ||
c906108c | 3344 | static void |
fba45db2 | 3345 | procfs_fetch_registers (int regno) |
c906108c | 3346 | { |
c3f6f71d JM |
3347 | gdb_fpregset_t *fpregs; |
3348 | gdb_gregset_t *gregs; | |
3349 | procinfo *pi; | |
3350 | int pid; | |
3351 | int tid; | |
c906108c | 3352 | |
c3f6f71d JM |
3353 | pid = PIDGET (inferior_pid); |
3354 | tid = TIDGET (inferior_pid); | |
3355 | ||
3356 | /* First look up procinfo for the main process. */ | |
3357 | pi = find_procinfo_or_die (pid, 0); | |
3358 | ||
3359 | /* If the event thread is not the same as GDB's requested thread | |
3360 | (ie. inferior_pid), then look up procinfo for the requested | |
3361 | thread. */ | |
3362 | if ((tid != 0) && | |
3363 | (tid != proc_get_current_thread (pi))) | |
3364 | pi = find_procinfo_or_die (pid, tid); | |
3365 | ||
3366 | if (pi == NULL) | |
3367 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
3368 | target_pid_to_str (inferior_pid)); | |
3369 | ||
3370 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3371 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3372 | ||
3373 | supply_gregset (gregs); | |
3374 | ||
60054393 MS |
3375 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3376 | { | |
3377 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3378 | regno == PC_REGNUM || | |
3379 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3380 | regno == FP_REGNUM || | |
3381 | regno == SP_REGNUM) | |
3382 | return; /* not a floating point register */ | |
c5aa993b | 3383 | |
60054393 MS |
3384 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3385 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3386 | |
60054393 MS |
3387 | supply_fpregset (fpregs); |
3388 | } | |
c906108c SS |
3389 | } |
3390 | ||
c3f6f71d JM |
3391 | /* Get ready to modify the registers array. On machines which store |
3392 | individual registers, this doesn't need to do anything. On | |
3393 | machines which store all the registers in one fell swoop, such as | |
3394 | /proc, this makes sure that registers contains all the registers | |
3395 | from the program being debugged. */ | |
3396 | ||
c906108c | 3397 | static void |
fba45db2 | 3398 | procfs_prepare_to_store (void) |
c906108c | 3399 | { |
c3f6f71d JM |
3400 | #ifdef CHILD_PREPARE_TO_STORE |
3401 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3402 | #endif |
c906108c SS |
3403 | } |
3404 | ||
3405 | /* | |
c3f6f71d JM |
3406 | * store_registers |
3407 | * | |
3408 | * Since the /proc interface will not read individual registers, | |
3409 | * we will cache these requests until the process is resumed, and | |
3410 | * only then write them back to the inferior process. | |
3411 | * | |
3412 | * FIXME: is that a really bad idea? Have to think about cases | |
3413 | * where writing one register might affect the value of others, etc. | |
3414 | */ | |
c906108c | 3415 | |
c3f6f71d | 3416 | static void |
fba45db2 | 3417 | procfs_store_registers (int regno) |
c3f6f71d JM |
3418 | { |
3419 | gdb_fpregset_t *fpregs; | |
3420 | gdb_gregset_t *gregs; | |
3421 | procinfo *pi; | |
3422 | int pid; | |
3423 | int tid; | |
c906108c | 3424 | |
c3f6f71d JM |
3425 | pid = PIDGET (inferior_pid); |
3426 | tid = TIDGET (inferior_pid); | |
c906108c | 3427 | |
c3f6f71d JM |
3428 | /* First find procinfo for main process */ |
3429 | pi = find_procinfo_or_die (pid, 0); | |
3430 | ||
3431 | /* If current lwp for process is not the same as requested thread | |
3432 | (ie. inferior_pid), then find procinfo for the requested thread. */ | |
3433 | ||
3434 | if ((tid != 0) && | |
3435 | (tid != proc_get_current_thread (pi))) | |
3436 | pi = find_procinfo_or_die (pid, tid); | |
3437 | ||
3438 | if (pi == NULL) | |
3439 | error ("procfs: store_registers: failed to find procinfo for %s", | |
3440 | target_pid_to_str (inferior_pid)); | |
c906108c | 3441 | |
c3f6f71d JM |
3442 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3443 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3444 | |
c3f6f71d JM |
3445 | fill_gregset (gregs, regno); |
3446 | if (!proc_set_gregs (pi)) | |
3447 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3448 | |
60054393 MS |
3449 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3450 | { | |
3451 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3452 | regno == PC_REGNUM || | |
3453 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3454 | regno == FP_REGNUM || | |
3455 | regno == SP_REGNUM) | |
3456 | return; /* not a floating point register */ | |
3457 | ||
3458 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3459 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3460 | ||
3461 | fill_fpregset (fpregs, regno); | |
3462 | if (!proc_set_fpregs (pi)) | |
3463 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3464 | } | |
c3f6f71d | 3465 | } |
c906108c | 3466 | |
c3f6f71d JM |
3467 | /* |
3468 | * Function: target_wait | |
3469 | * | |
3470 | * Retrieve the next stop event from the child process. | |
3471 | * If child has not stopped yet, wait for it to stop. | |
3472 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3473 | * into gdb internal event codes. | |
3474 | * | |
3475 | * Return: id of process (and possibly thread) that incurred the event. | |
3476 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3477 | */ |
3478 | ||
c3f6f71d | 3479 | static int |
fba45db2 | 3480 | procfs_wait (int pid, struct target_waitstatus *status) |
c906108c | 3481 | { |
c3f6f71d JM |
3482 | /* First cut: loosely based on original version 2.1 */ |
3483 | procinfo *pi; | |
3484 | int temp, wstat; | |
3485 | int retval; | |
3486 | int why, what, flags; | |
3487 | int retry = 0; | |
c906108c | 3488 | |
c3f6f71d | 3489 | wait_again: |
c906108c | 3490 | |
c3f6f71d JM |
3491 | retry++; |
3492 | wstat = 0; | |
3493 | retval = -1; | |
c906108c | 3494 | |
c3f6f71d JM |
3495 | /* Find procinfo for main process */ |
3496 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
3497 | if (pi) | |
c906108c | 3498 | { |
c3f6f71d JM |
3499 | /* We must assume that the status is stale now... */ |
3500 | pi->status_valid = 0; | |
3501 | pi->gregs_valid = 0; | |
3502 | pi->fpregs_valid = 0; | |
3503 | ||
3504 | #if 0 /* just try this out... */ | |
3505 | flags = proc_flags (pi); | |
3506 | why = proc_why (pi); | |
3507 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3508 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3509 | #endif | |
3510 | /* If child is not stopped, wait for it to stop. */ | |
3511 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3512 | !proc_wait_for_stop (pi)) | |
c906108c | 3513 | { |
c3f6f71d JM |
3514 | /* wait_for_stop failed: has the child terminated? */ |
3515 | if (errno == ENOENT) | |
c906108c | 3516 | { |
c3f6f71d JM |
3517 | /* /proc file not found; presumably child has terminated. */ |
3518 | retval = wait (&wstat); /* "wait" for the child's exit */ | |
3519 | ||
3520 | if (retval != PIDGET (inferior_pid)) /* wrong child? */ | |
3521 | error ("procfs: couldn't stop process %d: wait returned %d\n", | |
3522 | inferior_pid, retval); | |
3523 | /* FIXME: might I not just use waitpid? | |
3524 | Or try find_procinfo to see if I know about this child? */ | |
c906108c | 3525 | } |
c3f6f71d | 3526 | else |
c906108c | 3527 | { |
c3f6f71d JM |
3528 | /* Unknown error from wait_for_stop. */ |
3529 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3530 | } |
c3f6f71d JM |
3531 | } |
3532 | else | |
3533 | { | |
3534 | /* This long block is reached if either: | |
3535 | a) the child was already stopped, or | |
3536 | b) we successfully waited for the child with wait_for_stop. | |
3537 | This block will analyze the /proc status, and translate it | |
3538 | into a waitstatus for GDB. | |
3539 | ||
3540 | If we actually had to call wait because the /proc file | |
3541 | is gone (child terminated), then we skip this block, | |
3542 | because we already have a waitstatus. */ | |
3543 | ||
3544 | flags = proc_flags (pi); | |
3545 | why = proc_why (pi); | |
3546 | what = proc_what (pi); | |
3547 | ||
c3f6f71d | 3548 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3549 | { |
c3f6f71d JM |
3550 | #ifdef PR_ASYNC |
3551 | /* If it's running async (for single_thread control), | |
3552 | set it back to normal again. */ | |
3553 | if (flags & PR_ASYNC) | |
3554 | if (!proc_unset_async (pi)) | |
3555 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3556 | #endif | |
3557 | ||
3558 | if (info_verbose) | |
3559 | proc_prettyprint_why (why, what, 1); | |
3560 | ||
3561 | /* The 'pid' we will return to GDB is composed of | |
3562 | the process ID plus the lwp ID. */ | |
3563 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3564 | ||
3565 | switch (why) { | |
3566 | case PR_SIGNALLED: | |
3567 | wstat = (what << 8) | 0177; | |
3568 | break; | |
3569 | case PR_SYSENTRY: | |
3570 | switch (what) { | |
3571 | #ifdef SYS_lwp_exit | |
3572 | case SYS_lwp_exit: | |
3573 | #endif | |
3574 | #ifdef SYS_lwpexit | |
3575 | case SYS_lwpexit: | |
3576 | #endif | |
3577 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3578 | printf_filtered ("[%s exited]\n", | |
3579 | target_pid_to_str (retval)); | |
3580 | delete_thread (retval); | |
3581 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3582 | return retval; | |
3583 | #endif /* _lwp_exit */ | |
3584 | ||
3585 | case SYS_exit: | |
3586 | /* Handle SYS_exit call only */ | |
3587 | /* Stopped at entry to SYS_exit. | |
3588 | Make it runnable, resume it, then use | |
3589 | the wait system call to get its exit code. | |
3590 | Proc_run_process always clears the current | |
3591 | fault and signal. | |
3592 | Then return its exit status. */ | |
3593 | pi->status_valid = 0; | |
3594 | wstat = 0; | |
3595 | /* FIXME: what we should do is return | |
3596 | TARGET_WAITKIND_SPURIOUS. */ | |
3597 | if (!proc_run_process (pi, 0, 0)) | |
3598 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3599 | if (attach_flag) | |
3600 | { | |
3601 | /* Don't call wait: simulate waiting for exit, | |
3602 | return a "success" exit code. Bogus: what if | |
3603 | it returns something else? */ | |
3604 | wstat = 0; | |
02d5252f | 3605 | retval = inferior_pid; /* ? ? ? */ |
c3f6f71d JM |
3606 | } |
3607 | else | |
3608 | { | |
3609 | int temp = wait (&wstat); | |
3610 | ||
3611 | /* FIXME: shouldn't I make sure I get the right | |
3612 | event from the right process? If (for | |
3613 | instance) I have killed an earlier inferior | |
3614 | process but failed to clean up after it | |
3615 | somehow, I could get its termination event | |
3616 | here. */ | |
3617 | ||
3618 | /* If wait returns -1, that's what we return to GDB. */ | |
3619 | if (temp < 0) | |
3620 | retval = temp; | |
3621 | } | |
3622 | break; | |
3623 | default: | |
3624 | printf_filtered ("procfs: trapped on entry to "); | |
3625 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3626 | printf_filtered ("\n"); | |
3627 | #ifndef PIOCSSPCACT | |
3628 | { | |
3629 | long i, nsysargs, *sysargs; | |
3630 | ||
3631 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3632 | (sysargs = proc_sysargs (pi)) != NULL) | |
3633 | { | |
0fda6bd2 | 3634 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3635 | for (i = 0; i < nsysargs; i++) |
02d5252f | 3636 | printf_filtered ("#%ld: 0x%08lx\n", |
c3f6f71d JM |
3637 | i, sysargs[i]); |
3638 | } | |
3639 | ||
3640 | } | |
3641 | #endif | |
3642 | if (status) | |
3643 | { | |
3644 | /* How to exit gracefully, returning "unknown event" */ | |
3645 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3646 | return inferior_pid; | |
3647 | } | |
3648 | else | |
3649 | { | |
3650 | /* How to keep going without returning to wfi: */ | |
3651 | target_resume (pid, 0, TARGET_SIGNAL_0); | |
3652 | goto wait_again; | |
3653 | } | |
3654 | break; | |
3655 | } | |
3656 | break; | |
3657 | case PR_SYSEXIT: | |
3658 | switch (what) { | |
3659 | #ifdef SYS_exec | |
3660 | case SYS_exec: | |
3661 | #endif | |
3662 | #ifdef SYS_execv | |
3663 | case SYS_execv: | |
3664 | #endif | |
3665 | #ifdef SYS_execve | |
3666 | case SYS_execve: | |
3667 | #endif | |
3668 | /* Hopefully this is our own "fork-child" execing | |
3669 | the real child. Hoax this event into a trap, and | |
3670 | GDB will see the child about to execute its start | |
3671 | address. */ | |
3672 | wstat = (SIGTRAP << 8) | 0177; | |
3673 | break; | |
3674 | #ifdef SYS_lwp_create | |
3675 | case SYS_lwp_create: | |
3676 | #endif | |
3677 | #ifdef SYS_lwpcreate | |
3678 | case SYS_lwpcreate: | |
3679 | #endif | |
3680 | #if defined(SYS_lwp_create) || defined(SYS_lwpcreate) | |
3681 | /* | |
3682 | * This syscall is somewhat like fork/exec. | |
3683 | * We will get the event twice: once for the parent LWP, | |
3684 | * and once for the child. We should already know about | |
3685 | * the parent LWP, but the child will be new to us. So, | |
3686 | * whenever we get this event, if it represents a new | |
3687 | * thread, simply add the thread to the list. | |
3688 | */ | |
3689 | ||
3690 | /* If not in procinfo list, add it. */ | |
3691 | temp = proc_get_current_thread (pi); | |
3692 | if (!find_procinfo (pi->pid, temp)) | |
3693 | create_procinfo (pi->pid, temp); | |
3694 | ||
3695 | temp = MERGEPID (pi->pid, temp); | |
3696 | /* If not in GDB's thread list, add it. */ | |
3697 | if (!in_thread_list (temp)) | |
3698 | { | |
3699 | printf_filtered ("[New %s]\n", target_pid_to_str (temp)); | |
3700 | add_thread (temp); | |
3701 | } | |
3702 | /* Return to WFI, but tell it to immediately resume. */ | |
3703 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3704 | return inferior_pid; | |
3705 | #endif /* _lwp_create */ | |
c906108c | 3706 | |
c3f6f71d JM |
3707 | #ifdef SYS_lwp_exit |
3708 | case SYS_lwp_exit: | |
3709 | #endif | |
3710 | #ifdef SYS_lwpexit | |
3711 | case SYS_lwpexit: | |
3712 | #endif | |
3713 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3714 | printf_filtered ("[%s exited]\n", | |
3715 | target_pid_to_str (retval)); | |
3716 | delete_thread (retval); | |
3717 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3718 | return retval; | |
3719 | #endif /* _lwp_exit */ | |
3720 | ||
3721 | #ifdef SYS_sproc | |
3722 | case SYS_sproc: | |
3723 | /* Nothing to do here for now. The old procfs | |
3724 | seemed to use this event to handle threads on | |
3725 | older (non-LWP) systems, where I'm assuming that | |
3726 | threads were actually separate processes. Irix, | |
3727 | maybe? Anyway, low priority for now. */ | |
3728 | #endif | |
3729 | #ifdef SYS_fork | |
3730 | case SYS_fork: | |
3731 | /* FIXME: do we need to handle this? Investigate. */ | |
3732 | #endif | |
3733 | #ifdef SYS_vfork | |
3734 | case SYS_vfork: | |
3735 | /* FIXME: see above. */ | |
3736 | #endif | |
3737 | default: | |
3738 | printf_filtered ("procfs: trapped on exit from "); | |
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 | #endif | |
3755 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3756 | return inferior_pid; | |
3757 | } | |
3758 | break; | |
3759 | case PR_REQUESTED: | |
3760 | #if 0 /* FIXME */ | |
3761 | wstat = (SIGSTOP << 8) | 0177; | |
3762 | break; | |
3763 | #else | |
3764 | if (retry < 5) | |
3765 | { | |
3766 | printf_filtered ("Retry #%d:\n", retry); | |
3767 | pi->status_valid = 0; | |
3768 | goto wait_again; | |
3769 | } | |
3770 | else | |
3771 | { | |
3772 | /* If not in procinfo list, add it. */ | |
3773 | temp = proc_get_current_thread (pi); | |
3774 | if (!find_procinfo (pi->pid, temp)) | |
3775 | create_procinfo (pi->pid, temp); | |
3776 | ||
3777 | /* If not in GDB's thread list, add it. */ | |
3778 | temp = MERGEPID (pi->pid, temp); | |
3779 | if (!in_thread_list (temp)) | |
3780 | { | |
0d06e24b | 3781 | printf_filtered ("[New %s]\n", |
c3f6f71d JM |
3782 | target_pid_to_str (temp)); |
3783 | add_thread (temp); | |
3784 | } | |
3785 | ||
3786 | status->kind = TARGET_WAITKIND_STOPPED; | |
3787 | status->value.sig = 0; | |
3788 | return retval; | |
3789 | } | |
3790 | #endif | |
3791 | case PR_JOBCONTROL: | |
3792 | wstat = (what << 8) | 0177; | |
3793 | break; | |
3794 | case PR_FAULTED: | |
3795 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
3796 | #ifdef FLTWATCH | |
3797 | case FLTWATCH: | |
3798 | wstat = (SIGTRAP << 8) | 0177; | |
3799 | break; | |
3800 | #endif | |
3801 | #ifdef FLTKWATCH | |
3802 | case FLTKWATCH: | |
3803 | wstat = (SIGTRAP << 8) | 0177; | |
3804 | break; | |
3805 | #endif | |
3806 | /* FIXME: use si_signo where possible. */ | |
3807 | case FLTPRIV: | |
3808 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
3809 | case FLTILL: | |
3810 | #endif | |
3811 | wstat = (SIGILL << 8) | 0177; | |
3812 | break; | |
3813 | case FLTBPT: | |
3814 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
3815 | case FLTTRACE: | |
3816 | #endif | |
3817 | wstat = (SIGTRAP << 8) | 0177; | |
3818 | break; | |
3819 | case FLTSTACK: | |
3820 | case FLTACCESS: | |
3821 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
3822 | case FLTBOUNDS: | |
3823 | #endif | |
3824 | wstat = (SIGSEGV << 8) | 0177; | |
3825 | break; | |
3826 | case FLTIOVF: | |
3827 | case FLTIZDIV: | |
3828 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
3829 | case FLTFPE: | |
3830 | #endif | |
3831 | wstat = (SIGFPE << 8) | 0177; | |
3832 | break; | |
3833 | case FLTPAGE: /* Recoverable page fault */ | |
3834 | default: /* FIXME: use si_signo if possible for fault */ | |
3835 | retval = -1; | |
3836 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3837 | printf_filtered ("child stopped for unknown reason:\n"); | |
3838 | proc_prettyprint_why (why, what, 1); | |
3839 | error ("... giving up..."); | |
3840 | break; | |
3841 | } | |
3842 | break; /* case PR_FAULTED: */ | |
3843 | default: /* switch (why) unmatched */ | |
3844 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3845 | printf_filtered ("child stopped for unknown reason:\n"); | |
3846 | proc_prettyprint_why (why, what, 1); | |
3847 | error ("... giving up..."); | |
3848 | break; | |
3849 | } | |
3850 | /* | |
3851 | * Got this far without error: | |
3852 | * If retval isn't in the threads database, add it. | |
3853 | */ | |
3854 | if (retval > 0 && | |
3855 | retval != inferior_pid && | |
3856 | !in_thread_list (retval)) | |
c906108c | 3857 | { |
c3f6f71d JM |
3858 | /* |
3859 | * We have a new thread. | |
3860 | * We need to add it both to GDB's list and to our own. | |
3861 | * If we don't create a procinfo, resume may be unhappy | |
3862 | * later. | |
3863 | */ | |
3864 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
3865 | add_thread (retval); | |
3866 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
3867 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
3868 | ||
3869 | /* In addition, it's possible that this is the first | |
3870 | * new thread we've seen, in which case we may not | |
3871 | * have created entries for inferior_pid yet. | |
3872 | */ | |
3873 | if (TIDGET (inferior_pid) != 0) | |
3874 | { | |
3875 | if (!in_thread_list (inferior_pid)) | |
3876 | add_thread (inferior_pid); | |
3877 | if (find_procinfo (PIDGET (inferior_pid), | |
3878 | TIDGET (inferior_pid)) == NULL) | |
3879 | create_procinfo (PIDGET (inferior_pid), | |
3880 | TIDGET (inferior_pid)); | |
3881 | } | |
c906108c | 3882 | } |
c906108c | 3883 | } |
c3f6f71d | 3884 | else /* flags do not indicate STOPPED */ |
c906108c | 3885 | { |
c3f6f71d JM |
3886 | /* surely this can't happen... */ |
3887 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
3888 | __LINE__); | |
3889 | proc_prettyprint_flags (flags, 1); | |
3890 | error ("procfs: ...giving up..."); | |
c906108c | 3891 | } |
c906108c | 3892 | } |
c906108c | 3893 | |
c3f6f71d JM |
3894 | if (status) |
3895 | store_waitstatus (status, wstat); | |
c906108c SS |
3896 | } |
3897 | ||
c3f6f71d JM |
3898 | return retval; |
3899 | } | |
c906108c | 3900 | |
d0849a9a KB |
3901 | /* Transfer LEN bytes between GDB address MYADDR and target address |
3902 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
3903 | otherwise transfer them from the target. TARGET is unused. | |
3904 | ||
3905 | The return value is 0 if an error occurred or no bytes were | |
3906 | transferred. Otherwise, it will be a positive value which | |
3907 | indicates the number of bytes transferred between gdb and the | |
3908 | target. (Note that the interface also makes provisions for | |
3909 | negative values, but this capability isn't implemented here.) */ | |
3910 | ||
c3f6f71d | 3911 | static int |
d0849a9a | 3912 | procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite, |
043780a1 | 3913 | struct mem_attrib *attrib, |
d0849a9a | 3914 | struct target_ops *target) |
c3f6f71d JM |
3915 | { |
3916 | procinfo *pi; | |
3917 | int nbytes = 0; | |
c906108c | 3918 | |
c3f6f71d JM |
3919 | /* Find procinfo for main process */ |
3920 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
3921 | if (pi->as_fd == 0 && | |
3922 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 3923 | { |
c3f6f71d JM |
3924 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
3925 | return 0; | |
c906108c | 3926 | } |
c906108c | 3927 | |
c3f6f71d | 3928 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 3929 | { |
c3f6f71d | 3930 | if (dowrite) |
c906108c | 3931 | { |
c3f6f71d JM |
3932 | #ifdef NEW_PROC_API |
3933 | PROCFS_NOTE ("write memory: "); | |
c906108c | 3934 | #else |
c3f6f71d | 3935 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 3936 | #endif |
c3f6f71d | 3937 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 3938 | } |
c3f6f71d | 3939 | else |
c906108c | 3940 | { |
c3f6f71d JM |
3941 | PROCFS_NOTE ("read memory: \n"); |
3942 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 3943 | } |
c3f6f71d | 3944 | if (nbytes < 0) |
c906108c | 3945 | { |
c3f6f71d | 3946 | nbytes = 0; |
c906108c | 3947 | } |
c906108c | 3948 | } |
c3f6f71d | 3949 | return nbytes; |
c906108c SS |
3950 | } |
3951 | ||
3952 | /* | |
c3f6f71d JM |
3953 | * Function: invalidate_cache |
3954 | * | |
3955 | * Called by target_resume before making child runnable. | |
3956 | * Mark cached registers and status's invalid. | |
3957 | * If there are "dirty" caches that need to be written back | |
3958 | * to the child process, do that. | |
3959 | * | |
3960 | * File descriptors are also cached. | |
3961 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
3962 | * However, as they are expensive to open, we don't want to throw them | |
3963 | * away indescriminately either. As a compromise, we will keep the | |
3964 | * file descriptors for the parent process, but discard any file | |
3965 | * descriptors we may have accumulated for the threads. | |
3966 | * | |
3967 | * Return value: | |
3968 | * As this function is called by iterate_over_threads, it always | |
3969 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
3970 | */ |
3971 | ||
c3f6f71d JM |
3972 | |
3973 | static int | |
fba45db2 | 3974 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 3975 | { |
c3f6f71d JM |
3976 | /* |
3977 | * About to run the child; invalidate caches and do any other cleanup. | |
3978 | */ | |
c906108c | 3979 | |
c3f6f71d JM |
3980 | #if 0 |
3981 | if (pi->gregs_dirty) | |
3982 | if (parent == NULL || | |
3983 | proc_get_current_thread (parent) != pi->tid) | |
3984 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
3985 | proc_warn (pi, "target_resume, set_gregs", | |
3986 | __LINE__); | |
60054393 MS |
3987 | if (FP0_REGNUM >= 0) |
3988 | if (pi->fpregs_dirty) | |
3989 | if (parent == NULL || | |
3990 | proc_get_current_thread (parent) != pi->tid) | |
3991 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
3992 | proc_warn (pi, "target_resume, set_fpregs", | |
3993 | __LINE__); | |
c906108c | 3994 | #endif |
c906108c | 3995 | |
c3f6f71d | 3996 | if (parent != NULL) |
c906108c | 3997 | { |
c3f6f71d JM |
3998 | /* The presence of a parent indicates that this is an LWP. |
3999 | Close any file descriptors that it might have open. | |
4000 | We don't do this to the master (parent) procinfo. */ | |
4001 | ||
4002 | close_procinfo_files (pi); | |
c906108c | 4003 | } |
c3f6f71d JM |
4004 | pi->gregs_valid = 0; |
4005 | pi->fpregs_valid = 0; | |
4006 | #if 0 | |
4007 | pi->gregs_dirty = 0; | |
4008 | pi->fpregs_dirty = 0; | |
c906108c | 4009 | #endif |
c3f6f71d JM |
4010 | pi->status_valid = 0; |
4011 | pi->threads_valid = 0; | |
c906108c | 4012 | |
c3f6f71d | 4013 | return 0; |
c906108c SS |
4014 | } |
4015 | ||
0fda6bd2 | 4016 | #if 0 |
c906108c | 4017 | /* |
c3f6f71d JM |
4018 | * Function: make_signal_thread_runnable |
4019 | * | |
4020 | * A callback function for iterate_over_threads. | |
4021 | * Find the asynchronous signal thread, and make it runnable. | |
4022 | * See if that helps matters any. | |
c906108c SS |
4023 | */ |
4024 | ||
c3f6f71d | 4025 | static int |
fba45db2 | 4026 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4027 | { |
c3f6f71d JM |
4028 | #ifdef PR_ASLWP |
4029 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4030 | { |
c3f6f71d JM |
4031 | if (!proc_run_process (pi, 0, -1)) |
4032 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4033 | return 1; | |
c906108c | 4034 | } |
c906108c | 4035 | #endif |
c3f6f71d | 4036 | return 0; |
c906108c | 4037 | } |
0fda6bd2 | 4038 | #endif |
c906108c SS |
4039 | |
4040 | /* | |
c3f6f71d JM |
4041 | * Function: target_resume |
4042 | * | |
4043 | * Make the child process runnable. Normally we will then call | |
4044 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4045 | * | |
4046 | * Arguments: | |
4047 | * step: if true, then arrange for the child to stop again | |
4048 | * after executing a single instruction. | |
4049 | * signo: if zero, then cancel any pending signal. | |
4050 | * If non-zero, then arrange for the indicated signal | |
4051 | * to be delivered to the child when it runs. | |
4052 | * pid: if -1, then allow any child thread to run. | |
4053 | * if non-zero, then allow only the indicated thread to run. | |
4054 | ******* (not implemented yet) | |
c906108c SS |
4055 | */ |
4056 | ||
4057 | static void | |
fba45db2 | 4058 | procfs_resume (int pid, int step, enum target_signal signo) |
c906108c | 4059 | { |
c3f6f71d JM |
4060 | procinfo *pi, *thread; |
4061 | int native_signo; | |
4062 | ||
4063 | /* 2.1: | |
4064 | prrun.prflags |= PRSVADDR; | |
4065 | prrun.pr_vaddr = $PC; set resume address | |
4066 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4067 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4068 | prrun.prflags |= PRCFAULT; clear current fault. | |
4069 | ||
4070 | PRSTRACE and PRSFAULT can be done by other means | |
4071 | (proc_trace_signals, proc_trace_faults) | |
4072 | PRSVADDR is unnecessary. | |
4073 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4074 | This basically leaves PRSTEP and PRCSIG. | |
4075 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4076 | So basically PR_STEP is the sole argument that must be passed | |
4077 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4078 | ||
4079 | /* Find procinfo for main process */ | |
4080 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4081 | ||
4082 | /* First cut: ignore pid argument */ | |
4083 | errno = 0; | |
c906108c | 4084 | |
c3f6f71d JM |
4085 | /* Convert signal to host numbering. */ |
4086 | if (signo == 0 || | |
0fda6bd2 | 4087 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4088 | native_signo = 0; |
4089 | else | |
4090 | native_signo = target_signal_to_host (signo); | |
c906108c | 4091 | |
c3f6f71d | 4092 | pi->ignore_next_sigstop = 0; |
c906108c | 4093 | |
c3f6f71d JM |
4094 | /* Running the process voids all cached registers and status. */ |
4095 | /* Void the threads' caches first */ | |
4096 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4097 | /* Void the process procinfo's caches. */ | |
4098 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4099 | |
c3f6f71d | 4100 | if (pid != -1) |
c906108c | 4101 | { |
c3f6f71d JM |
4102 | /* Resume a specific thread, presumably suppressing the others. */ |
4103 | thread = find_procinfo (PIDGET (pid), TIDGET (pid)); | |
4104 | if (thread == NULL) | |
4105 | warning ("procfs: resume can't find thread %d -- resuming all.", | |
4106 | TIDGET (pid)); | |
4107 | else | |
c906108c | 4108 | { |
c3f6f71d JM |
4109 | if (thread->tid != 0) |
4110 | { | |
4111 | /* We're to resume a specific thread, and not the others. | |
4112 | * Set the child process's PR_ASYNC flag. | |
4113 | */ | |
4114 | #ifdef PR_ASYNC | |
4115 | if (!proc_set_async (pi)) | |
4116 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4117 | #endif | |
4118 | #if 0 | |
4119 | proc_iterate_over_threads (pi, | |
4120 | make_signal_thread_runnable, | |
4121 | NULL); | |
4122 | #endif | |
4123 | pi = thread; /* substitute the thread's procinfo for run */ | |
4124 | } | |
c906108c SS |
4125 | } |
4126 | } | |
c906108c | 4127 | |
c3f6f71d | 4128 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4129 | { |
c3f6f71d JM |
4130 | if (errno == EBUSY) |
4131 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4132 | else | |
4133 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4134 | } |
c3f6f71d | 4135 | } |
c906108c | 4136 | |
c3f6f71d JM |
4137 | /* |
4138 | * Function: register_gdb_signals | |
4139 | * | |
4140 | * Traverse the list of signals that GDB knows about | |
4141 | * (see "handle" command), and arrange for the target | |
4142 | * to be stopped or not, according to these settings. | |
4143 | * | |
4144 | * Returns non-zero for success, zero for failure. | |
4145 | */ | |
c906108c | 4146 | |
c3f6f71d | 4147 | static int |
fba45db2 | 4148 | register_gdb_signals (procinfo *pi, sigset_t *signals) |
c3f6f71d JM |
4149 | { |
4150 | int signo; | |
c906108c | 4151 | |
c3f6f71d JM |
4152 | for (signo = 0; signo < NSIG; signo ++) |
4153 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4154 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4155 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4156 | prdelset (signals, signo); | |
4157 | else | |
4158 | praddset (signals, signo); | |
c906108c | 4159 | |
c3f6f71d | 4160 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4161 | } |
4162 | ||
4163 | /* | |
c3f6f71d JM |
4164 | * Function: target_notice_signals |
4165 | * | |
4166 | * Set up to trace signals in the child process. | |
4167 | */ | |
c906108c | 4168 | |
c3f6f71d | 4169 | static void |
fba45db2 | 4170 | procfs_notice_signals (int pid) |
c3f6f71d JM |
4171 | { |
4172 | sigset_t signals; | |
4173 | procinfo *pi = find_procinfo_or_die (PIDGET (pid), 0); | |
c906108c | 4174 | |
c3f6f71d JM |
4175 | if (proc_get_traced_signals (pi, &signals) && |
4176 | register_gdb_signals (pi, &signals)) | |
4177 | return; | |
4178 | else | |
4179 | proc_error (pi, "notice_signals", __LINE__); | |
4180 | } | |
c906108c | 4181 | |
c3f6f71d JM |
4182 | /* |
4183 | * Function: target_files_info | |
4184 | * | |
4185 | * Print status information about the child process. | |
4186 | */ | |
c906108c | 4187 | |
c3f6f71d | 4188 | static void |
fba45db2 | 4189 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d JM |
4190 | { |
4191 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4192 | attach_flag? "attached": "child", | |
4193 | target_pid_to_str (inferior_pid)); | |
4194 | } | |
c906108c | 4195 | |
c3f6f71d JM |
4196 | /* |
4197 | * Function: target_open | |
4198 | * | |
4199 | * A dummy: you don't open procfs. | |
c906108c SS |
4200 | */ |
4201 | ||
4202 | static void | |
fba45db2 | 4203 | procfs_open (char *args, int from_tty) |
c906108c | 4204 | { |
c3f6f71d JM |
4205 | error ("Use the \"run\" command to start a Unix child process."); |
4206 | } | |
c906108c | 4207 | |
c3f6f71d JM |
4208 | /* |
4209 | * Function: target_can_run | |
4210 | * | |
4211 | * This tells GDB that this target vector can be invoked | |
4212 | * for "run" or "attach". | |
4213 | */ | |
c906108c | 4214 | |
c3f6f71d JM |
4215 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4216 | be a runnable target. Used by targets | |
4217 | that can sit atop procfs, such as solaris | |
4218 | thread support. */ | |
c906108c | 4219 | |
c906108c | 4220 | |
c3f6f71d | 4221 | static int |
fba45db2 | 4222 | procfs_can_run (void) |
c3f6f71d JM |
4223 | { |
4224 | /* This variable is controlled by modules that sit atop procfs that | |
4225 | may layer their own process structure atop that provided here. | |
4226 | sol-thread.c does this because of the Solaris two-level thread | |
4227 | model. */ | |
4228 | ||
4229 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4230 | |
c3f6f71d JM |
4231 | return !procfs_suppress_run; |
4232 | } | |
c906108c | 4233 | |
c3f6f71d JM |
4234 | /* |
4235 | * Function: target_stop | |
4236 | * | |
4237 | * Stop the child process asynchronously, as when the | |
4238 | * gdb user types control-c or presses a "stop" button. | |
4239 | * | |
4240 | * Works by sending kill(SIGINT) to the child's process group. | |
4241 | */ | |
c906108c | 4242 | |
c3f6f71d | 4243 | static void |
fba45db2 | 4244 | procfs_stop (void) |
c3f6f71d JM |
4245 | { |
4246 | extern pid_t inferior_process_group; | |
c906108c | 4247 | |
c3f6f71d | 4248 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4249 | } |
4250 | ||
c906108c | 4251 | /* |
c3f6f71d JM |
4252 | * Function: unconditionally_kill_inferior |
4253 | * | |
4254 | * Make it die. Wait for it to die. Clean up after it. | |
4255 | * Note: this should only be applied to the real process, | |
4256 | * not to an LWP, because of the check for parent-process. | |
4257 | * If we need this to work for an LWP, it needs some more logic. | |
4258 | */ | |
c906108c | 4259 | |
c3f6f71d | 4260 | static void |
fba45db2 | 4261 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4262 | { |
4263 | int parent_pid; | |
c906108c | 4264 | |
c3f6f71d JM |
4265 | parent_pid = proc_parent_pid (pi); |
4266 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4267 | /* FIXME: use access functions */ | |
4268 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4269 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4270 | file for the inferior. */ | |
4271 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4272 | { | |
4273 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4274 | } | |
4275 | #endif | |
4276 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4277 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4278 | to kill the inferior, otherwise it might remain stopped with a | |
4279 | pending SIGKILL. | |
4280 | We do not check the result of the PIOCSSIG, the inferior might have | |
4281 | died already. */ | |
4282 | { | |
4283 | struct siginfo newsiginfo; | |
c906108c | 4284 | |
c3f6f71d JM |
4285 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4286 | newsiginfo.si_signo = SIGKILL; | |
4287 | newsiginfo.si_code = 0; | |
4288 | newsiginfo.si_errno = 0; | |
4289 | newsiginfo.si_pid = getpid (); | |
4290 | newsiginfo.si_uid = getuid (); | |
4291 | /* FIXME: use proc_set_current_signal */ | |
4292 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4293 | } | |
4294 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4295 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4296 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4297 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4298 | destroy_procinfo (pi); | |
c906108c | 4299 | |
c3f6f71d JM |
4300 | /* If pi is GDB's child, wait for it to die. */ |
4301 | if (parent_pid == getpid ()) | |
4302 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4303 | Should we check the returned event? */ | |
4304 | { | |
0d06e24b | 4305 | #if 0 |
c3f6f71d | 4306 | int status, ret; |
c906108c | 4307 | |
c3f6f71d JM |
4308 | ret = waitpid (pi->pid, &status, 0); |
4309 | #else | |
4310 | wait (NULL); | |
4311 | #endif | |
4312 | } | |
4313 | } | |
c906108c | 4314 | |
c3f6f71d JM |
4315 | /* |
4316 | * Function: target_kill_inferior | |
4317 | * | |
4318 | * We're done debugging it, and we want it to go away. | |
4319 | * Then we want GDB to forget all about it. | |
c906108c SS |
4320 | */ |
4321 | ||
c3f6f71d | 4322 | static void |
fba45db2 | 4323 | procfs_kill_inferior (void) |
c906108c | 4324 | { |
c3f6f71d JM |
4325 | if (inferior_pid != 0) /* ? */ |
4326 | { | |
4327 | /* Find procinfo for main process */ | |
4328 | procinfo *pi = find_procinfo (PIDGET (inferior_pid), 0); | |
c906108c | 4329 | |
c3f6f71d JM |
4330 | if (pi) |
4331 | unconditionally_kill_inferior (pi); | |
4332 | target_mourn_inferior (); | |
c906108c | 4333 | } |
c3f6f71d JM |
4334 | } |
4335 | ||
4336 | /* | |
4337 | * Function: target_mourn_inferior | |
4338 | * | |
4339 | * Forget we ever debugged this thing! | |
4340 | */ | |
c906108c | 4341 | |
c3f6f71d | 4342 | static void |
fba45db2 | 4343 | procfs_mourn_inferior (void) |
c3f6f71d JM |
4344 | { |
4345 | procinfo *pi; | |
c906108c | 4346 | |
c3f6f71d JM |
4347 | if (inferior_pid != 0) |
4348 | { | |
4349 | /* Find procinfo for main process */ | |
4350 | pi = find_procinfo (PIDGET (inferior_pid), 0); | |
4351 | if (pi) | |
4352 | destroy_procinfo (pi); | |
c906108c | 4353 | } |
c3f6f71d JM |
4354 | unpush_target (&procfs_ops); |
4355 | generic_mourn_inferior (); | |
4356 | } | |
c906108c | 4357 | |
c3f6f71d JM |
4358 | /* |
4359 | * Function: init_inferior | |
4360 | * | |
4361 | * When GDB forks to create a runnable inferior process, | |
4362 | * this function is called on the parent side of the fork. | |
4363 | * It's job is to do whatever is necessary to make the child | |
4364 | * ready to be debugged, and then wait for the child to synchronize. | |
4365 | */ | |
c906108c | 4366 | |
c3f6f71d | 4367 | static void |
fba45db2 | 4368 | procfs_init_inferior (int pid) |
c3f6f71d JM |
4369 | { |
4370 | procinfo *pi; | |
4371 | sigset_t signals; | |
4372 | int fail; | |
c906108c | 4373 | |
c3f6f71d JM |
4374 | /* This routine called on the parent side (GDB side) |
4375 | after GDB forks the inferior. */ | |
c906108c | 4376 | |
c3f6f71d | 4377 | push_target (&procfs_ops); |
c906108c | 4378 | |
c3f6f71d JM |
4379 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4380 | perror ("procfs: out of memory in 'init_inferior'"); | |
4381 | ||
4382 | if (!open_procinfo_files (pi, FD_CTL)) | |
4383 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4384 | ||
4385 | /* | |
4386 | xmalloc // done | |
4387 | open_procinfo_files // done | |
4388 | link list // done | |
4389 | prfillset (trace) | |
4390 | procfs_notice_signals | |
4391 | prfillset (fault) | |
4392 | prdelset (FLTPAGE) | |
4393 | PIOCWSTOP | |
4394 | PIOCSFAULT | |
4395 | */ | |
4396 | ||
4397 | /* If not stopped yet, wait for it to stop. */ | |
4398 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4399 | !(proc_wait_for_stop (pi))) | |
4400 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4401 | ||
4402 | /* Save some of the /proc state to be restored if we detach. */ | |
4403 | /* FIXME: Why? In case another debugger was debugging it? | |
4404 | We're it's parent, for Ghu's sake! */ | |
4405 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4406 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4407 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4408 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4409 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4410 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
4411 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
4412 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); | |
4413 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
4414 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); | |
4415 | ||
4416 | /* Register to trace selected signals in the child. */ | |
4417 | prfillset (&signals); | |
4418 | if (!register_gdb_signals (pi, &signals)) | |
4419 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4420 | ||
4421 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4422 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4423 | ||
0d06e24b JM |
4424 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4425 | and possibly even turning ON kill-on-last-close at this point. But | |
4426 | I can't make that change without careful testing which I don't have | |
4427 | time to do right now... */ | |
c3f6f71d JM |
4428 | /* Turn on run-on-last-close flag so that the child |
4429 | will die if GDB goes away for some reason. */ | |
4430 | if (!proc_set_run_on_last_close (pi)) | |
4431 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4432 | ||
4433 | /* The 'process ID' we return to GDB is composed of | |
4434 | the actual process ID plus the lwp ID. */ | |
4435 | inferior_pid = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c | 4436 | |
c3f6f71d JM |
4437 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4438 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4439 | #else | |
4440 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4441 | startup_inferior (2); | |
0d06e24b | 4442 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4443 | } |
c906108c | 4444 | |
c3f6f71d JM |
4445 | /* |
4446 | * Function: set_exec_trap | |
4447 | * | |
4448 | * When GDB forks to create a new process, this function is called | |
4449 | * on the child side of the fork before GDB exec's the user program. | |
4450 | * Its job is to make the child minimally debuggable, so that the | |
4451 | * parent GDB process can connect to the child and take over. | |
4452 | * This function should do only the minimum to make that possible, | |
4453 | * and to synchronize with the parent process. The parent process | |
4454 | * should take care of the details. | |
4455 | */ | |
4456 | ||
4457 | static void | |
fba45db2 | 4458 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4459 | { |
4460 | /* This routine called on the child side (inferior side) | |
4461 | after GDB forks the inferior. It must use only local variables, | |
4462 | because it may be sharing data space with its parent. */ | |
c906108c | 4463 | |
c3f6f71d JM |
4464 | procinfo *pi; |
4465 | sysset_t exitset; | |
c906108c | 4466 | |
c3f6f71d JM |
4467 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4468 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4469 | |
c3f6f71d JM |
4470 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4471 | { | |
4472 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4473 | gdb_flush (gdb_stderr); | |
4474 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4475 | _exit (127); | |
4476 | } | |
c906108c | 4477 | |
c3f6f71d JM |
4478 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4479 | /* OSF method for tracing exec syscalls. Quoting: | |
4480 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4481 | exits from exec system calls because of the user level loader. */ | |
4482 | /* FIXME: make nice and maybe move into an access function. */ | |
4483 | { | |
4484 | int prfs_flags; | |
c906108c | 4485 | |
c3f6f71d JM |
4486 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4487 | { | |
4488 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4489 | gdb_flush (gdb_stderr); | |
4490 | _exit (127); | |
4491 | } | |
4492 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4493 | |
c3f6f71d JM |
4494 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4495 | { | |
4496 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4497 | gdb_flush (gdb_stderr); | |
4498 | _exit (127); | |
4499 | } | |
4500 | } | |
4501 | #else /* not PRFS_STOPEXEC */ | |
4502 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4503 | /* GW: Rationale... | |
4504 | Not all systems with /proc have all the exec* syscalls with the same | |
4505 | names. On the SGI, for example, there is no SYS_exec, but there | |
4506 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4507 | |
c3f6f71d JM |
4508 | premptyset (&exitset); |
4509 | #ifdef SYS_exec | |
4510 | praddset (&exitset, SYS_exec); | |
4511 | #endif | |
4512 | #ifdef SYS_execve | |
4513 | praddset (&exitset, SYS_execve); | |
4514 | #endif | |
4515 | #ifdef SYS_execv | |
4516 | praddset (&exitset, SYS_execv); | |
c906108c | 4517 | #endif |
c906108c | 4518 | |
c3f6f71d | 4519 | if (!proc_set_traced_sysexit (pi, &exitset)) |
c906108c | 4520 | { |
c3f6f71d JM |
4521 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4522 | gdb_flush (gdb_stderr); | |
4523 | _exit (127); | |
c906108c | 4524 | } |
c3f6f71d JM |
4525 | #endif /* PRFS_STOPEXEC */ |
4526 | ||
4527 | /* FIXME: should this be done in the parent instead? */ | |
4528 | /* Turn off inherit on fork flag so that all grand-children | |
4529 | of gdb start with tracing flags cleared. */ | |
4530 | if (!proc_unset_inherit_on_fork (pi)) | |
4531 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4532 | ||
4533 | /* Turn off run on last close flag, so that the child process | |
4534 | cannot run away just because we close our handle on it. | |
4535 | We want it to wait for the parent to attach. */ | |
4536 | if (!proc_unset_run_on_last_close (pi)) | |
4537 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4538 | ||
4539 | /* FIXME: No need to destroy the procinfo -- | |
4540 | we have our own address space, and we're about to do an exec! */ | |
4541 | /*destroy_procinfo (pi);*/ | |
c906108c | 4542 | } |
c906108c | 4543 | |
c3f6f71d JM |
4544 | /* |
4545 | * Function: create_inferior | |
4546 | * | |
4547 | * This function is called BEFORE gdb forks the inferior process. | |
4548 | * Its only real responsibility is to set things up for the fork, | |
4549 | * and tell GDB which two functions to call after the fork (one | |
4550 | * for the parent, and one for the child). | |
4551 | * | |
4552 | * This function does a complicated search for a unix shell program, | |
4553 | * which it then uses to parse arguments and environment variables | |
4554 | * to be sent to the child. I wonder whether this code could not | |
4555 | * be abstracted out and shared with other unix targets such as | |
4556 | * infptrace? | |
4557 | */ | |
c906108c SS |
4558 | |
4559 | static void | |
fba45db2 | 4560 | procfs_create_inferior (char *exec_file, char *allargs, char **env) |
c906108c SS |
4561 | { |
4562 | char *shell_file = getenv ("SHELL"); | |
4563 | char *tryname; | |
4564 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4565 | { | |
4566 | ||
4567 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4568 | just do this the normal way (via execlp, which operates by |
4569 | attempting an exec for each element of the PATH until it | |
4570 | finds one which succeeds), then there will be an exec for | |
4571 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4572 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4573 | for these failed execs with the ones for successful execs | |
4574 | (whether the exec has succeeded is stored at that time in the | |
4575 | carry bit or some such architecture-specific and | |
4576 | non-ABI-specified place). | |
4577 | ||
4578 | So I can't think of anything better than to search the PATH | |
4579 | now. This has several disadvantages: (1) There is a race | |
4580 | condition; if we find a file now and it is deleted before we | |
4581 | exec it, we lose, even if the deletion leaves a valid file | |
4582 | further down in the PATH, (2) there is no way to know exactly | |
4583 | what an executable (in the sense of "capable of being | |
4584 | exec'd") file is. Using access() loses because it may lose | |
4585 | if the caller is the superuser; failing to use it loses if | |
4586 | there are ACLs or some such. */ | |
c906108c SS |
4587 | |
4588 | char *p; | |
4589 | char *p1; | |
4590 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4591 | path is used from within GDB. */ |
c906108c SS |
4592 | char *path = getenv ("PATH"); |
4593 | int len; | |
4594 | struct stat statbuf; | |
4595 | ||
4596 | if (path == NULL) | |
4597 | path = "/bin:/usr/bin"; | |
4598 | ||
4599 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4600 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4601 | { |
4602 | p1 = strchr (p, ':'); | |
4603 | if (p1 != NULL) | |
4604 | len = p1 - p; | |
4605 | else | |
4606 | len = strlen (p); | |
4607 | strncpy (tryname, p, len); | |
4608 | tryname[len] = '\0'; | |
4609 | strcat (tryname, "/"); | |
4610 | strcat (tryname, shell_file); | |
4611 | if (access (tryname, X_OK) < 0) | |
4612 | continue; | |
4613 | if (stat (tryname, &statbuf) < 0) | |
4614 | continue; | |
4615 | if (!S_ISREG (statbuf.st_mode)) | |
4616 | /* We certainly need to reject directories. I'm not quite | |
4617 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4618 | that people want to exec() these things. */ | |
4619 | continue; | |
4620 | break; | |
4621 | } | |
4622 | if (p == NULL) | |
4623 | /* Not found. This must be an error rather than merely passing | |
4624 | the file to execlp(), because execlp() would try all the | |
4625 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
4626 | error ("procfs:%d -- Can't find shell %s in PATH", |
4627 | __LINE__, shell_file); | |
c906108c SS |
4628 | |
4629 | shell_file = tryname; | |
4630 | } | |
4631 | ||
c3f6f71d JM |
4632 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4633 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
4634 | |
4635 | /* We are at the first instruction we care about. */ | |
4636 | /* Pedal to the metal... */ | |
4637 | ||
2acceee2 | 4638 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
4639 | } |
4640 | ||
c3f6f71d JM |
4641 | /* |
4642 | * Function: notice_thread | |
4643 | * | |
4644 | * Callback for find_new_threads. | |
4645 | * Calls "add_thread". | |
4646 | */ | |
c906108c | 4647 | |
c3f6f71d | 4648 | static int |
fba45db2 | 4649 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4650 | { |
c3f6f71d | 4651 | int gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4652 | |
c3f6f71d JM |
4653 | if (!in_thread_list (gdb_threadid)) |
4654 | add_thread (gdb_threadid); | |
c906108c | 4655 | |
c3f6f71d JM |
4656 | return 0; |
4657 | } | |
4658 | ||
4659 | /* | |
4660 | * Function: target_find_new_threads | |
4661 | * | |
4662 | * Query all the threads that the target knows about, | |
4663 | * and give them back to GDB to add to its list. | |
4664 | */ | |
4665 | ||
4666 | void | |
fba45db2 | 4667 | procfs_find_new_threads (void) |
c3f6f71d JM |
4668 | { |
4669 | procinfo *pi; | |
4670 | ||
4671 | /* Find procinfo for main process */ | |
4672 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4673 | proc_update_threads (pi); | |
4674 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4675 | } |
4676 | ||
c3f6f71d JM |
4677 | /* |
4678 | * Function: target_thread_alive | |
4679 | * | |
4680 | * Return true if the thread is still 'alive'. | |
4681 | * | |
4682 | * This guy doesn't really seem to be doing his job. | |
4683 | * Got to investigate how to tell when a thread is really gone. | |
4684 | */ | |
c906108c | 4685 | |
c906108c | 4686 | static int |
fba45db2 | 4687 | procfs_thread_alive (int pid) |
c906108c | 4688 | { |
c3f6f71d JM |
4689 | int proc, thread; |
4690 | procinfo *pi; | |
c906108c | 4691 | |
c3f6f71d JM |
4692 | proc = PIDGET (pid); |
4693 | thread = TIDGET (pid); | |
4694 | /* If I don't know it, it ain't alive! */ | |
4695 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
4696 | return 0; | |
4697 | ||
4698 | /* If I can't get its status, it ain't alive! | |
4699 | What's more, I need to forget about it! */ | |
4700 | if (!proc_get_status (pi)) | |
4701 | { | |
4702 | destroy_procinfo (pi); | |
4703 | return 0; | |
4704 | } | |
4705 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
4706 | return 1; | |
c906108c | 4707 | } |
c3f6f71d JM |
4708 | |
4709 | /* | |
4710 | * Function: target_pid_to_str | |
4711 | * | |
4712 | * Return a string to be used to identify the thread in | |
4713 | * the "info threads" display. | |
4714 | */ | |
4715 | ||
4716 | char * | |
fba45db2 | 4717 | procfs_pid_to_str (int pid) |
c3f6f71d JM |
4718 | { |
4719 | static char buf[80]; | |
4720 | int proc, thread; | |
4721 | procinfo *pi; | |
4722 | ||
4723 | proc = PIDGET (pid); | |
4724 | thread = TIDGET (pid); | |
4725 | pi = find_procinfo (proc, thread); | |
4726 | ||
4727 | if (thread == 0) | |
4728 | sprintf (buf, "Process %d", proc); | |
4729 | else | |
4730 | sprintf (buf, "LWP %d", thread); | |
4731 | return &buf[0]; | |
4732 | } | |
4733 | ||
4734 | /* | |
4735 | * Function: procfs_set_watchpoint | |
4736 | * Insert a watchpoint | |
4737 | */ | |
4738 | ||
4739 | int | |
fba45db2 | 4740 | procfs_set_watchpoint (int pid, CORE_ADDR addr, int len, int rwflag, int after) |
c906108c | 4741 | { |
c3f6f71d JM |
4742 | #ifndef UNIXWARE |
4743 | int pflags = 0; | |
4744 | procinfo *pi; | |
4745 | ||
4746 | pi = find_procinfo_or_die (pid == -1 ? | |
4747 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4748 | ||
4749 | /* Translate from GDB's flags to /proc's */ | |
4750 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 4751 | { |
c3f6f71d JM |
4752 | switch (rwflag) { /* FIXME: need an enum! */ |
4753 | case hw_write: /* default watchpoint (write) */ | |
4754 | pflags = WRITE_WATCHFLAG; | |
4755 | break; | |
4756 | case hw_read: /* read watchpoint */ | |
4757 | pflags = READ_WATCHFLAG; | |
4758 | break; | |
4759 | case hw_access: /* access watchpoint */ | |
4760 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4761 | break; | |
4762 | case hw_execute: /* execution HW breakpoint */ | |
4763 | pflags = EXEC_WATCHFLAG; | |
4764 | break; | |
4765 | default: /* Something weird. Return error. */ | |
c906108c | 4766 | return -1; |
c3f6f71d JM |
4767 | } |
4768 | if (after) /* Stop after r/w access is completed. */ | |
4769 | pflags |= AFTER_WATCHFLAG; | |
4770 | } | |
4771 | ||
4772 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4773 | { | |
4774 | if (errno == E2BIG) /* Typical error for no resources */ | |
4775 | return -1; /* fail */ | |
4776 | /* GDB may try to remove the same watchpoint twice. | |
4777 | If a remove request returns no match, don't error. */ | |
c906108c | 4778 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4779 | return 0; /* ignore */ |
4780 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4781 | } |
c3f6f71d | 4782 | #endif |
c906108c SS |
4783 | return 0; |
4784 | } | |
4785 | ||
c3f6f71d JM |
4786 | /* |
4787 | * Function: stopped_by_watchpoint | |
4788 | * | |
4789 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
4790 | * else returns zero. | |
4791 | */ | |
4792 | ||
c906108c | 4793 | int |
fba45db2 | 4794 | procfs_stopped_by_watchpoint (int pid) |
c906108c | 4795 | { |
c3f6f71d | 4796 | procinfo *pi; |
c906108c | 4797 | |
aaeb7efa MS |
4798 | pi = find_procinfo (pid == -1 ? |
4799 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4800 | ||
4801 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
4802 | return 0; | |
4803 | ||
c3f6f71d | 4804 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4805 | { |
c3f6f71d JM |
4806 | if (proc_why (pi) == PR_FAULTED) |
4807 | { | |
c906108c | 4808 | #ifdef FLTWATCH |
c3f6f71d JM |
4809 | if (proc_what (pi) == FLTWATCH) |
4810 | return 1; | |
c906108c SS |
4811 | #endif |
4812 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4813 | if (proc_what (pi) == FLTKWATCH) |
4814 | return 1; | |
c906108c | 4815 | #endif |
c3f6f71d | 4816 | } |
c906108c SS |
4817 | } |
4818 | return 0; | |
4819 | } | |
c906108c | 4820 | |
c3f6f71d JM |
4821 | #ifdef TM_I386SOL2_H |
4822 | /* | |
4823 | * Function: procfs_find_LDT_entry | |
4824 | * | |
4825 | * Input: | |
4826 | * int pid; // The GDB-style pid-plus-LWP. | |
4827 | * | |
4828 | * Return: | |
4829 | * pointer to the corresponding LDT entry. | |
4830 | */ | |
c906108c | 4831 | |
c3f6f71d | 4832 | struct ssd * |
fba45db2 | 4833 | procfs_find_LDT_entry (int pid) |
c906108c | 4834 | { |
c3f6f71d JM |
4835 | gdb_gregset_t *gregs; |
4836 | int key; | |
4837 | procinfo *pi; | |
c906108c | 4838 | |
c3f6f71d JM |
4839 | /* Find procinfo for the lwp. */ |
4840 | if ((pi = find_procinfo (PIDGET (pid), TIDGET (pid))) == NULL) | |
c906108c | 4841 | { |
c3f6f71d JM |
4842 | warning ("procfs_find_LDT_entry: could not find procinfi for %d.", |
4843 | pid); | |
4844 | return NULL; | |
c906108c | 4845 | } |
c3f6f71d JM |
4846 | /* get its general registers. */ |
4847 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
4848 | { | |
4849 | warning ("procfs_find_LDT_entry: could not read gregs for %d.", | |
4850 | pid); | |
4851 | return NULL; | |
4852 | } | |
4853 | /* Now extract the GS register's lower 16 bits. */ | |
4854 | key = (*gregs)[GS] & 0xffff; | |
4855 | ||
4856 | /* Find the matching entry and return it. */ | |
4857 | return proc_get_LDT_entry (pi, key); | |
c906108c | 4858 | } |
c3f6f71d | 4859 | #endif /* TM_I386SOL2_H */ |
c906108c | 4860 | |
c3f6f71d JM |
4861 | |
4862 | ||
4863 | static void | |
fba45db2 | 4864 | info_proc_cmd (char *args, int from_tty) |
c906108c | 4865 | { |
c3f6f71d JM |
4866 | struct cleanup *old_chain; |
4867 | procinfo *process = NULL; | |
4868 | procinfo *thread = NULL; | |
4869 | char **argv = NULL; | |
4870 | char *tmp = NULL; | |
4871 | int pid = 0; | |
4872 | int tid = 0; | |
c906108c | 4873 | |
c3f6f71d JM |
4874 | old_chain = make_cleanup (null_cleanup, 0); |
4875 | if (args) | |
0fda6bd2 JM |
4876 | { |
4877 | if ((argv = buildargv (args)) == NULL) | |
4878 | nomem (0); | |
4879 | else | |
004527cb | 4880 | make_cleanup_freeargv (argv); |
0fda6bd2 | 4881 | } |
c3f6f71d JM |
4882 | while (argv != NULL && *argv != NULL) |
4883 | { | |
4884 | if (isdigit (argv[0][0])) | |
4885 | { | |
4886 | pid = strtoul (argv[0], &tmp, 10); | |
4887 | if (*tmp == '/') | |
4888 | tid = strtoul (++tmp, NULL, 10); | |
4889 | } | |
4890 | else if (argv[0][0] == '/') | |
4891 | { | |
4892 | tid = strtoul (argv[0] + 1, NULL, 10); | |
4893 | } | |
4894 | else | |
4895 | { | |
4896 | /* [...] */ | |
4897 | } | |
4898 | argv++; | |
4899 | } | |
4900 | if (pid == 0) | |
4901 | pid = PIDGET (inferior_pid); | |
4902 | if (pid == 0) | |
4903 | error ("No current process: you must name one."); | |
4904 | else | |
c906108c | 4905 | { |
c3f6f71d JM |
4906 | /* Have pid, will travel. |
4907 | First see if it's a process we're already debugging. */ | |
4908 | process = find_procinfo (pid, 0); | |
4909 | if (process == NULL) | |
4910 | { | |
4911 | /* No. So open a procinfo for it, but | |
4912 | remember to close it again when finished. */ | |
4913 | process = create_procinfo (pid, 0); | |
004527cb | 4914 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
4915 | if (!open_procinfo_files (process, FD_CTL)) |
4916 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
4917 | } | |
c906108c | 4918 | } |
c3f6f71d JM |
4919 | if (tid != 0) |
4920 | thread = create_procinfo (pid, tid); | |
4921 | ||
4922 | if (process) | |
4923 | { | |
4924 | printf_filtered ("process %d flags:\n", process->pid); | |
4925 | proc_prettyprint_flags (proc_flags (process), 1); | |
4926 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
4927 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
4928 | if (proc_get_nthreads (process) > 1) | |
4929 | printf_filtered ("Process has %d threads.\n", | |
4930 | proc_get_nthreads (process)); | |
4931 | } | |
4932 | if (thread) | |
4933 | { | |
4934 | printf_filtered ("thread %d flags:\n", thread->tid); | |
4935 | proc_prettyprint_flags (proc_flags (thread), 1); | |
4936 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
4937 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
4938 | } | |
4939 | ||
4940 | do_cleanups (old_chain); | |
c906108c SS |
4941 | } |
4942 | ||
c3f6f71d | 4943 | static void |
fba45db2 | 4944 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 4945 | { |
c3f6f71d JM |
4946 | procinfo *pi; |
4947 | sysset_t *sysset; | |
4948 | int syscallnum = 0; | |
c906108c | 4949 | |
c3f6f71d JM |
4950 | if (inferior_pid <= 0) |
4951 | error ("you must be debugging a process to use this command."); | |
c906108c | 4952 | |
c3f6f71d JM |
4953 | if (args == NULL || args[0] == 0) |
4954 | error_no_arg ("system call to trace"); | |
4955 | ||
4956 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4957 | if (isdigit (args[0])) | |
4958 | { | |
4959 | syscallnum = atoi (args); | |
4960 | if (entry_or_exit == PR_SYSENTRY) | |
4961 | sysset = proc_get_traced_sysentry (pi, NULL); | |
4962 | else | |
4963 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 4964 | |
c3f6f71d JM |
4965 | if (sysset == NULL) |
4966 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 4967 | |
c3f6f71d JM |
4968 | if (mode == FLAG_SET) |
4969 | praddset (sysset, syscallnum); | |
4970 | else | |
4971 | prdelset (sysset, syscallnum); | |
c906108c | 4972 | |
c3f6f71d JM |
4973 | if (entry_or_exit == PR_SYSENTRY) |
4974 | { | |
4975 | if (!proc_set_traced_sysentry (pi, sysset)) | |
4976 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
4977 | } | |
4978 | else | |
4979 | { | |
4980 | if (!proc_set_traced_sysexit (pi, sysset)) | |
4981 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
4982 | } | |
4983 | } | |
4984 | } | |
4985 | ||
4986 | static void | |
fba45db2 | 4987 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 4988 | { |
c3f6f71d JM |
4989 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
4990 | } | |
c906108c | 4991 | |
c3f6f71d | 4992 | static void |
fba45db2 | 4993 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
4994 | { |
4995 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 4996 | } |
c906108c | 4997 | |
c3f6f71d | 4998 | static void |
fba45db2 | 4999 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5000 | { |
5001 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5002 | } | |
5003 | ||
5004 | static void | |
fba45db2 | 5005 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5006 | { |
c3f6f71d JM |
5007 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5008 | } | |
c906108c | 5009 | |
c906108c | 5010 | |
c906108c | 5011 | void |
fba45db2 | 5012 | _initialize_procfs (void) |
c906108c | 5013 | { |
c906108c SS |
5014 | init_procfs_ops (); |
5015 | add_target (&procfs_ops); | |
c3f6f71d JM |
5016 | add_info ("proc", info_proc_cmd, |
5017 | "Show /proc process information about any running process.\ | |
5018 | Default is the process being debugged."); | |
5019 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, | |
5020 | "Give a trace of entries into the syscall."); | |
5021 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5022 | "Give a trace of exits from the syscall."); | |
5023 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5024 | "Cancel a trace of entries into the syscall."); | |
5025 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5026 | "Cancel a trace of exits from the syscall."); | |
c3f6f71d JM |
5027 | } |
5028 | ||
5029 | /* =================== END, GDB "MODULE" =================== */ | |
5030 | ||
5031 | ||
5032 | ||
5033 | /* miscelaneous stubs: */ | |
5034 | /* The following satisfy a few random symbols mostly created by */ | |
5035 | /* the solaris threads implementation, which I will chase down */ | |
5036 | /* later. */ | |
5037 | ||
5038 | /* | |
5039 | * Return a pid for which we guarantee | |
5040 | * we will be able to find a 'live' procinfo. | |
5041 | */ | |
5042 | ||
5043 | int | |
fba45db2 | 5044 | procfs_first_available (void) |
c3f6f71d JM |
5045 | { |
5046 | if (procinfo_list) | |
5047 | return procinfo_list->pid; | |
5048 | else | |
5049 | return -1; | |
5050 | } |