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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 | 33 | #include <sys/procfs.h> |
37de36c6 | 34 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 35 | #include <sys/fault.h> |
37de36c6 KB |
36 | #endif |
37 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 38 | #include <sys/syscall.h> |
37de36c6 | 39 | #endif |
c3f6f71d | 40 | #include <sys/errno.h> |
0fda6bd2 JM |
41 | #include <sys/wait.h> |
42 | #include <signal.h> | |
43 | #include <ctype.h> | |
44 | ||
c3f6f71d JM |
45 | /* |
46 | * PROCFS.C | |
47 | * | |
48 | * This module provides the interface between GDB and the | |
49 | * /proc file system, which is used on many versions of Unix | |
50 | * as a means for debuggers to control other processes. | |
51 | * Examples of the systems that use this interface are: | |
52 | * Irix | |
53 | * Solaris | |
54 | * OSF | |
55 | * Unixware | |
37de36c6 | 56 | * AIX5 |
c3f6f71d JM |
57 | * |
58 | * /proc works by immitating a file system: you open a simulated file | |
59 | * that represents the process you wish to interact with, and | |
60 | * perform operations on that "file" in order to examine or change | |
61 | * the state of the other process. | |
62 | * | |
63 | * The most important thing to know about /proc and this module | |
64 | * is that there are two very different interfaces to /proc: | |
65 | * One that uses the ioctl system call, and | |
66 | * another that uses read and write system calls. | |
67 | * This module has to support both /proc interfaces. This means | |
68 | * that there are two different ways of doing every basic operation. | |
69 | * | |
70 | * In order to keep most of the code simple and clean, I have | |
71 | * defined an interface "layer" which hides all these system calls. | |
72 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
73 | * and most or all occurrances of this ifdef should be confined to | |
74 | * this interface layer. | |
c906108c SS |
75 | */ |
76 | ||
77 | ||
c3f6f71d JM |
78 | /* Determine which /proc API we are using: |
79 | The ioctl API defines PIOCSTATUS, while | |
80 | the read/write (multiple fd) API never does. */ | |
c906108c | 81 | |
c3f6f71d | 82 | #ifdef NEW_PROC_API |
c906108c | 83 | #include <sys/types.h> |
4b14d3e4 | 84 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 85 | #endif |
c906108c | 86 | |
c3f6f71d JM |
87 | #include <fcntl.h> /* for O_RDONLY */ |
88 | #include <unistd.h> /* for "X_OK" */ | |
89 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 90 | |
103b3ef5 MS |
91 | /* Note: procfs-utils.h must be included after the above system header |
92 | files, because it redefines various system calls using macros. | |
93 | This may be incompatible with the prototype declarations. */ | |
94 | ||
103b3ef5 MS |
95 | #include "proc-utils.h" |
96 | ||
c60c0f5f MS |
97 | /* Prototypes for supply_gregset etc. */ |
98 | #include "gregset.h" | |
99 | ||
c3f6f71d | 100 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 101 | |
c3f6f71d JM |
102 | /* |
103 | * This module defines the GDB target vector and its methods. | |
104 | */ | |
c906108c | 105 | |
8ab86381 | 106 | static void procfs_open (char *, int); |
a14ed312 KB |
107 | static void procfs_attach (char *, int); |
108 | static void procfs_detach (char *, int); | |
39f77062 | 109 | static void procfs_resume (ptid_t, int, enum target_signal); |
a14ed312 KB |
110 | static int procfs_can_run (void); |
111 | static void procfs_stop (void); | |
112 | static void procfs_files_info (struct target_ops *); | |
113 | static void procfs_fetch_registers (int); | |
114 | static void procfs_store_registers (int); | |
39f77062 | 115 | static void procfs_notice_signals (ptid_t); |
a14ed312 KB |
116 | static void procfs_prepare_to_store (void); |
117 | static void procfs_kill_inferior (void); | |
118 | static void procfs_mourn_inferior (void); | |
119 | static void procfs_create_inferior (char *, char *, char **); | |
39f77062 | 120 | static ptid_t procfs_wait (ptid_t, struct target_waitstatus *); |
043780a1 AC |
121 | static int procfs_xfer_memory (CORE_ADDR, char *, int, int, |
122 | struct mem_attrib *attrib, | |
123 | struct target_ops *); | |
a14ed312 | 124 | |
39f77062 | 125 | static int procfs_thread_alive (ptid_t); |
a14ed312 KB |
126 | |
127 | void procfs_find_new_threads (void); | |
39f77062 | 128 | char *procfs_pid_to_str (ptid_t); |
c3f6f71d JM |
129 | |
130 | struct target_ops procfs_ops; /* the target vector */ | |
c906108c | 131 | |
c3f6f71d | 132 | static void |
fba45db2 | 133 | init_procfs_ops (void) |
c3f6f71d JM |
134 | { |
135 | procfs_ops.to_shortname = "procfs"; | |
136 | procfs_ops.to_longname = "Unix /proc child process"; | |
137 | procfs_ops.to_doc = | |
138 | "Unix /proc child process (started by the \"run\" command)."; | |
139 | procfs_ops.to_open = procfs_open; | |
140 | procfs_ops.to_can_run = procfs_can_run; | |
141 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
142 | procfs_ops.to_kill = procfs_kill_inferior; | |
143 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
144 | procfs_ops.to_attach = procfs_attach; | |
145 | procfs_ops.to_detach = procfs_detach; | |
146 | procfs_ops.to_wait = procfs_wait; | |
147 | procfs_ops.to_resume = procfs_resume; | |
148 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
149 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
150 | procfs_ops.to_store_registers = procfs_store_registers; | |
151 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
152 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
153 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
154 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
155 | procfs_ops.to_files_info = procfs_files_info; | |
156 | procfs_ops.to_stop = procfs_stop; | |
157 | ||
158 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
159 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
160 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
161 | procfs_ops.to_terminal_ours = terminal_ours; | |
162 | procfs_ops.to_terminal_info = child_terminal_info; | |
163 | ||
164 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
165 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
166 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
167 | ||
103b3ef5 MS |
168 | procfs_ops.to_has_all_memory = 1; |
169 | procfs_ops.to_has_memory = 1; | |
c3f6f71d JM |
170 | procfs_ops.to_has_execution = 1; |
171 | procfs_ops.to_has_stack = 1; | |
172 | procfs_ops.to_has_registers = 1; | |
173 | procfs_ops.to_stratum = process_stratum; | |
174 | procfs_ops.to_has_thread_control = tc_schedlock; | |
175 | procfs_ops.to_magic = OPS_MAGIC; | |
176 | } | |
c906108c | 177 | |
c3f6f71d JM |
178 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
179 | ||
c3f6f71d JM |
180 | /* |
181 | * World Unification: | |
182 | * | |
183 | * Put any typedefs, defines etc. here that are required for | |
184 | * the unification of code that handles different versions of /proc. | |
185 | */ | |
186 | ||
187 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 188 | #ifdef WA_READ |
c3f6f71d JM |
189 | enum { READ_WATCHFLAG = WA_READ, |
190 | WRITE_WATCHFLAG = WA_WRITE, | |
191 | EXEC_WATCHFLAG = WA_EXEC, | |
192 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
193 | }; | |
194 | #endif | |
195 | #else /* Irix method for watchpoints */ | |
196 | enum { READ_WATCHFLAG = MA_READ, | |
197 | WRITE_WATCHFLAG = MA_WRITE, | |
198 | EXEC_WATCHFLAG = MA_EXEC, | |
199 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
200 | }; | |
201 | #endif | |
202 | ||
37de36c6 KB |
203 | /* gdb_sigset_t */ |
204 | #ifdef HAVE_PR_SIGSET_T | |
205 | typedef pr_sigset_t gdb_sigset_t; | |
206 | #else | |
207 | typedef sigset_t gdb_sigset_t; | |
208 | #endif | |
209 | ||
210 | /* sigaction */ | |
211 | #ifdef HAVE_PR_SIGACTION64_T | |
212 | typedef pr_sigaction64_t gdb_sigaction_t; | |
213 | #else | |
214 | typedef struct sigaction gdb_sigaction_t; | |
215 | #endif | |
216 | ||
217 | /* siginfo */ | |
218 | #ifdef HAVE_PR_SIGINFO64_T | |
219 | typedef pr_siginfo64_t gdb_siginfo_t; | |
220 | #else | |
221 | typedef struct siginfo gdb_siginfo_t; | |
222 | #endif | |
223 | ||
224 | /* gdb_premptysysset */ | |
225 | #ifdef premptysysset | |
226 | #define gdb_premptysysset premptysysset | |
227 | #else | |
228 | #define gdb_premptysysset premptyset | |
229 | #endif | |
230 | ||
231 | /* praddsysset */ | |
232 | #ifdef praddsysset | |
233 | #define gdb_praddsysset praddsysset | |
234 | #else | |
235 | #define gdb_praddsysset praddset | |
236 | #endif | |
237 | ||
238 | /* prdelsysset */ | |
239 | #ifdef prdelsysset | |
240 | #define gdb_prdelsysset prdelsysset | |
241 | #else | |
242 | #define gdb_prdelsysset prdelset | |
243 | #endif | |
244 | ||
245 | /* prissyssetmember */ | |
246 | #ifdef prissyssetmember | |
247 | #define gdb_pr_issyssetmember prissyssetmember | |
248 | #else | |
249 | #define gdb_pr_issyssetmember prismember | |
250 | #endif | |
251 | ||
252 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
253 | as intuitively descriptive as it could be, so we'll define | |
254 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
255 | this writing, this feature is only found on AIX5 systems and | |
256 | basically means that the set of syscalls is not fixed. I.e, | |
257 | there's no nice table that one can #include to get all of the | |
258 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
259 | for each process. We are at least guaranteed that they won't | |
260 | change over the lifetime of the process. But each process could | |
261 | (in theory) have different syscall numbers. | |
262 | */ | |
263 | #ifdef HAVE_PRSYSENT_T | |
264 | #define DYNAMIC_SYSCALLS | |
265 | #endif | |
c3f6f71d JM |
266 | |
267 | ||
268 | ||
269 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
270 | ||
271 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
272 | ||
273 | /* The procinfo struct is a wrapper to hold all the state information | |
274 | concerning a /proc process. There should be exactly one procinfo | |
275 | for each process, and since GDB currently can debug only one | |
276 | process at a time, that means there should be only one procinfo. | |
277 | All of the LWP's of a process can be accessed indirectly thru the | |
278 | single process procinfo. | |
279 | ||
280 | However, against the day when GDB may debug more than one process, | |
281 | this data structure is kept in a list (which for now will hold no | |
282 | more than one member), and many functions will have a pointer to a | |
283 | procinfo as an argument. | |
284 | ||
285 | There will be a separate procinfo structure for use by the (not yet | |
286 | implemented) "info proc" command, so that we can print useful | |
287 | information about any random process without interfering with the | |
288 | inferior's procinfo information. */ | |
289 | ||
290 | #ifdef NEW_PROC_API | |
291 | /* format strings for /proc paths */ | |
292 | # ifndef CTL_PROC_NAME_FMT | |
293 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
294 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
295 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
296 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
297 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
298 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
299 | # endif | |
300 | /* the name of the proc status struct depends on the implementation */ | |
301 | typedef pstatus_t gdb_prstatus_t; | |
302 | typedef lwpstatus_t gdb_lwpstatus_t; | |
303 | #else /* ! NEW_PROC_API */ | |
304 | /* format strings for /proc paths */ | |
305 | # ifndef CTL_PROC_NAME_FMT | |
306 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
307 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
308 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
309 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
310 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
311 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
312 | # endif | |
c906108c | 313 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 314 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
315 | typedef prstatus_t gdb_lwpstatus_t; |
316 | #endif /* NEW_PROC_API */ | |
c906108c | 317 | |
c3f6f71d JM |
318 | typedef struct procinfo { |
319 | struct procinfo *next; | |
320 | int pid; /* Process ID */ | |
321 | int tid; /* Thread/LWP id */ | |
c906108c | 322 | |
c3f6f71d JM |
323 | /* process state */ |
324 | int was_stopped; | |
325 | int ignore_next_sigstop; | |
c906108c | 326 | |
c3f6f71d JM |
327 | /* The following four fd fields may be identical, or may contain |
328 | several different fd's, depending on the version of /proc | |
329 | (old ioctl or new read/write). */ | |
c906108c | 330 | |
c3f6f71d JM |
331 | int ctl_fd; /* File descriptor for /proc control file */ |
332 | /* | |
333 | * The next three file descriptors are actually only needed in the | |
334 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
335 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
336 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
337 | * implementation) filling them with copies of the control fd. | |
338 | */ | |
339 | int status_fd; /* File descriptor for /proc status file */ | |
340 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 341 | |
c3f6f71d | 342 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 343 | |
c3f6f71d | 344 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
345 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
346 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
347 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
348 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 349 | |
c3f6f71d | 350 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 351 | |
c3f6f71d JM |
352 | #ifndef NEW_PROC_API |
353 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 354 | #endif |
37de36c6 KB |
355 | |
356 | #ifdef DYNAMIC_SYSCALLS | |
357 | int num_syscalls; /* Total number of syscalls */ | |
358 | char **syscall_names; /* Syscall number to name map */ | |
359 | #endif | |
c3f6f71d JM |
360 | |
361 | struct procinfo *thread_list; | |
c906108c | 362 | |
c3f6f71d JM |
363 | int status_valid : 1; |
364 | int gregs_valid : 1; | |
365 | int fpregs_valid : 1; | |
366 | int threads_valid: 1; | |
367 | } procinfo; | |
c906108c | 368 | |
c3f6f71d | 369 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 370 | |
c3f6f71d | 371 | /* Function prototypes for procinfo module: */ |
c906108c | 372 | |
a14ed312 KB |
373 | static procinfo *find_procinfo_or_die (int pid, int tid); |
374 | static procinfo *find_procinfo (int pid, int tid); | |
375 | static procinfo *create_procinfo (int pid, int tid); | |
376 | static void destroy_procinfo (procinfo * p); | |
004527cb | 377 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
378 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
379 | static int open_procinfo_files (procinfo * p, int which); | |
380 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
381 | static int sysset_t_size (procinfo *p); |
382 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
383 | #ifdef DYNAMIC_SYSCALLS | |
384 | static void load_syscalls (procinfo *pi); | |
385 | static void free_syscalls (procinfo *pi); | |
386 | static int find_syscall (procinfo *pi, char *name); | |
387 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 388 | |
c3f6f71d JM |
389 | /* The head of the procinfo list: */ |
390 | static procinfo * procinfo_list; | |
c906108c | 391 | |
c3f6f71d JM |
392 | /* |
393 | * Function: find_procinfo | |
394 | * | |
395 | * Search the procinfo list. | |
396 | * | |
397 | * Returns: pointer to procinfo, or NULL if not found. | |
398 | */ | |
c906108c | 399 | |
c3f6f71d | 400 | static procinfo * |
fba45db2 | 401 | find_procinfo (int pid, int tid) |
c5aa993b | 402 | { |
c3f6f71d | 403 | procinfo *pi; |
c906108c | 404 | |
c3f6f71d JM |
405 | for (pi = procinfo_list; pi; pi = pi->next) |
406 | if (pi->pid == pid) | |
407 | break; | |
c906108c | 408 | |
c3f6f71d JM |
409 | if (pi) |
410 | if (tid) | |
411 | { | |
412 | /* Don't check threads_valid. If we're updating the | |
413 | thread_list, we want to find whatever threads are already | |
414 | here. This means that in general it is the caller's | |
415 | responsibility to check threads_valid and update before | |
416 | calling find_procinfo, if the caller wants to find a new | |
417 | thread. */ | |
418 | ||
419 | for (pi = pi->thread_list; pi; pi = pi->next) | |
420 | if (pi->tid == tid) | |
421 | break; | |
422 | } | |
c906108c | 423 | |
c3f6f71d JM |
424 | return pi; |
425 | } | |
c906108c | 426 | |
c3f6f71d JM |
427 | /* |
428 | * Function: find_procinfo_or_die | |
429 | * | |
430 | * Calls find_procinfo, but errors on failure. | |
431 | */ | |
c906108c | 432 | |
c3f6f71d | 433 | static procinfo * |
fba45db2 | 434 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
435 | { |
436 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 437 | |
c3f6f71d | 438 | if (pi == NULL) |
0fda6bd2 JM |
439 | { |
440 | if (tid) | |
441 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
442 | pid, tid); | |
443 | else | |
444 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
445 | } | |
c3f6f71d JM |
446 | return pi; |
447 | } | |
c906108c | 448 | |
4d1bcd09 KB |
449 | /* open_with_retry() is a wrapper for open(). The appropriate |
450 | open() call is attempted; if unsuccessful, it will be retried as | |
451 | many times as needed for the EAGAIN and EINTR conditions. | |
452 | ||
453 | For other conditions, open_with_retry() will retry the open() a | |
454 | limited number of times. In addition, a short sleep is imposed | |
455 | prior to retrying the open(). The reason for this sleep is to give | |
456 | the kernel a chance to catch up and create the file in question in | |
457 | the event that GDB "wins" the race to open a file before the kernel | |
458 | has created it. */ | |
459 | ||
460 | static int | |
461 | open_with_retry (const char *pathname, int flags) | |
462 | { | |
463 | int retries_remaining, status; | |
464 | ||
465 | retries_remaining = 2; | |
466 | ||
467 | while (1) | |
468 | { | |
469 | status = open (pathname, flags); | |
470 | ||
471 | if (status >= 0 || retries_remaining == 0) | |
472 | break; | |
473 | else if (errno != EINTR && errno != EAGAIN) | |
474 | { | |
475 | retries_remaining--; | |
476 | sleep (1); | |
477 | } | |
478 | } | |
479 | ||
480 | return status; | |
481 | } | |
482 | ||
c3f6f71d JM |
483 | /* |
484 | * Function: open_procinfo_files | |
485 | * | |
486 | * Open the file descriptor for the process or LWP. | |
487 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
488 | * the others are opened lazily as needed. | |
489 | * else (if not NEW_PROC_API), there is only one real | |
490 | * file descriptor, but we keep multiple copies of it so that | |
491 | * the code that uses them does not have to be #ifdef'd. | |
492 | * | |
493 | * Return: file descriptor, or zero for failure. | |
494 | */ | |
c906108c | 495 | |
c3f6f71d | 496 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 497 | |
c3f6f71d | 498 | static int |
fba45db2 | 499 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 500 | { |
0fda6bd2 | 501 | #ifdef NEW_PROC_API |
c3f6f71d | 502 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 503 | #endif |
c3f6f71d JM |
504 | int fd; |
505 | ||
506 | /* | |
507 | * This function is getting ALMOST long enough to break up into several. | |
508 | * Here is some rationale: | |
509 | * | |
510 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
511 | * There are several file descriptors that may need to be open | |
512 | * for any given process or LWP. The ones we're intereted in are: | |
513 | * - control (ctl) write-only change the state | |
514 | * - status (status) read-only query the state | |
515 | * - address space (as) read/write access memory | |
516 | * - map (map) read-only virtual addr map | |
517 | * Most of these are opened lazily as they are needed. | |
518 | * The pathnames for the 'files' for an LWP look slightly | |
519 | * different from those of a first-class process: | |
520 | * Pathnames for a process (<proc-id>): | |
521 | * /proc/<proc-id>/ctl | |
522 | * /proc/<proc-id>/status | |
523 | * /proc/<proc-id>/as | |
524 | * /proc/<proc-id>/map | |
525 | * Pathnames for an LWP (lwp-id): | |
526 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
527 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
528 | * An LWP has no map or address space file descriptor, since | |
529 | * the memory map and address space are shared by all LWPs. | |
530 | * | |
531 | * Everyone else (Solaris 2.5, Irix, OSF) | |
532 | * There is only one file descriptor for each process or LWP. | |
533 | * For convenience, we copy the same file descriptor into all | |
534 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
535 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
536 | * doesn't need any #ifdef's. | |
537 | * Pathname for all: | |
538 | * /proc/<proc-id> | |
539 | * | |
540 | * Solaris 2.5 LWP's: | |
541 | * Each LWP has an independent file descriptor, but these | |
542 | * are not obtained via the 'open' system call like the rest: | |
543 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
544 | * to the file descriptor of the parent process. | |
545 | * | |
546 | * OSF threads: | |
547 | * These do not even have their own independent file descriptor. | |
548 | * All operations are carried out on the file descriptor of the | |
549 | * parent process. Therefore we just call open again for each | |
550 | * thread, getting a new handle for the same 'file'. | |
551 | */ | |
552 | ||
553 | #ifdef NEW_PROC_API | |
554 | /* | |
555 | * In this case, there are several different file descriptors that | |
556 | * we might be asked to open. The control file descriptor will be | |
557 | * opened early, but the others will be opened lazily as they are | |
558 | * needed. | |
559 | */ | |
560 | ||
561 | strcpy (tmp, pi->pathname); | |
562 | switch (which) { /* which file descriptor to open? */ | |
563 | case FD_CTL: | |
564 | if (pi->tid) | |
565 | strcat (tmp, "/lwpctl"); | |
566 | else | |
567 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 568 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
569 | if (fd <= 0) |
570 | return 0; /* fail */ | |
571 | pi->ctl_fd = fd; | |
572 | break; | |
573 | case FD_AS: | |
574 | if (pi->tid) | |
575 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
576 | strcat (tmp, "/as"); | |
4d1bcd09 | 577 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
578 | if (fd <= 0) |
579 | return 0; /* fail */ | |
580 | pi->as_fd = fd; | |
581 | break; | |
582 | case FD_STATUS: | |
583 | if (pi->tid) | |
584 | strcat (tmp, "/lwpstatus"); | |
585 | else | |
586 | strcat (tmp, "/status"); | |
4d1bcd09 | 587 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
588 | if (fd <= 0) |
589 | return 0; /* fail */ | |
590 | pi->status_fd = fd; | |
591 | break; | |
592 | default: | |
593 | return 0; /* unknown file descriptor */ | |
594 | } | |
595 | #else /* not NEW_PROC_API */ | |
596 | /* | |
597 | * In this case, there is only one file descriptor for each procinfo | |
598 | * (ie. each process or LWP). In fact, only the file descriptor for | |
599 | * the process can actually be opened by an 'open' system call. | |
600 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
601 | * on the process's file descriptor. | |
602 | * | |
603 | * For convenience, we copy each procinfo's single file descriptor | |
604 | * into all of the fields occupied by the several file descriptors | |
605 | * of the NEW_PROC_API implementation. That way, the code that uses | |
606 | * them can be written without ifdefs. | |
607 | */ | |
608 | ||
609 | ||
610 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
611 | /* Only one FD; just open it. */ |
612 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
613 | return 0; |
614 | #else /* Sol 2.5, Irix, other? */ | |
615 | if (pi->tid == 0) /* Master procinfo for the process */ | |
616 | { | |
4d1bcd09 | 617 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
618 | if (fd <= 0) |
619 | return 0; /* fail */ | |
620 | } | |
621 | else /* LWP thread procinfo */ | |
622 | { | |
623 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
624 | procinfo *process; | |
625 | int lwpid = pi->tid; | |
626 | ||
627 | /* Find the procinfo for the entire process. */ | |
628 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
629 | return 0; /* fail */ | |
630 | ||
631 | /* Now obtain the file descriptor for the LWP. */ | |
632 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
633 | return 0; /* fail */ | |
634 | #else /* Irix, other? */ | |
635 | return 0; /* Don't know how to open threads */ | |
636 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
637 | } | |
638 | #endif /* OSF PIOCTSTATUS */ | |
639 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
640 | #endif /* NEW_PROC_API */ | |
c906108c | 641 | |
c3f6f71d JM |
642 | return 1; /* success */ |
643 | } | |
c906108c | 644 | |
c3f6f71d JM |
645 | /* |
646 | * Function: create_procinfo | |
647 | * | |
648 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 649 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
650 | * |
651 | * Return: pointer to new procinfo struct. | |
652 | */ | |
c906108c | 653 | |
c3f6f71d | 654 | static procinfo * |
fba45db2 | 655 | create_procinfo (int pid, int tid) |
c3f6f71d JM |
656 | { |
657 | procinfo *pi, *parent; | |
c906108c | 658 | |
0d06e24b | 659 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 660 | return pi; /* Already exists, nothing to do. */ |
c906108c | 661 | |
c3f6f71d JM |
662 | /* find parent before doing malloc, to save having to cleanup */ |
663 | if (tid != 0) | |
664 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
665 | create it if it | |
666 | doesn't exist yet? */ | |
c906108c | 667 | |
c3f6f71d JM |
668 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
669 | memset (pi, 0, sizeof (procinfo)); | |
670 | pi->pid = pid; | |
671 | pi->tid = tid; | |
c906108c | 672 | |
37de36c6 KB |
673 | #ifdef DYNAMIC_SYSCALLS |
674 | load_syscalls (pi); | |
675 | #endif | |
676 | ||
1d5e0602 KB |
677 | pi->saved_entryset = sysset_t_alloc (pi); |
678 | pi->saved_exitset = sysset_t_alloc (pi); | |
679 | ||
c3f6f71d JM |
680 | /* Chain into list. */ |
681 | if (tid == 0) | |
682 | { | |
683 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
684 | pi->next = procinfo_list; | |
685 | procinfo_list = pi; | |
686 | } | |
687 | else | |
688 | { | |
689 | #ifdef NEW_PROC_API | |
690 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
691 | #else | |
692 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
693 | #endif | |
694 | pi->next = parent->thread_list; | |
695 | parent->thread_list = pi; | |
696 | } | |
697 | return pi; | |
698 | } | |
c906108c | 699 | |
c3f6f71d JM |
700 | /* |
701 | * Function: close_procinfo_files | |
702 | * | |
703 | * Close all file descriptors associated with the procinfo | |
704 | */ | |
c906108c | 705 | |
c3f6f71d | 706 | static void |
fba45db2 | 707 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
708 | { |
709 | if (pi->ctl_fd > 0) | |
710 | close (pi->ctl_fd); | |
711 | #ifdef NEW_PROC_API | |
712 | if (pi->as_fd > 0) | |
713 | close (pi->as_fd); | |
714 | if (pi->status_fd > 0) | |
715 | close (pi->status_fd); | |
716 | #endif | |
717 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
718 | } | |
c906108c | 719 | |
c3f6f71d JM |
720 | /* |
721 | * Function: destroy_procinfo | |
722 | * | |
723 | * Destructor function. Close, unlink and deallocate the object. | |
724 | */ | |
c906108c | 725 | |
c3f6f71d | 726 | static void |
fba45db2 | 727 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
728 | { |
729 | procinfo *ptr; | |
730 | ||
731 | /* Step one: unlink the procinfo from its list */ | |
732 | if (pi == *list) | |
733 | *list = pi->next; | |
734 | else | |
735 | for (ptr = *list; ptr; ptr = ptr->next) | |
736 | if (ptr->next == pi) | |
737 | { | |
738 | ptr->next = pi->next; | |
739 | break; | |
740 | } | |
7a292a7a | 741 | |
c3f6f71d JM |
742 | /* Step two: close any open file descriptors */ |
743 | close_procinfo_files (pi); | |
7a292a7a | 744 | |
c3f6f71d | 745 | /* Step three: free the memory. */ |
37de36c6 KB |
746 | #ifdef DYNAMIC_SYSCALLS |
747 | free_syscalls (pi); | |
748 | #endif | |
1d5e0602 KB |
749 | xfree (pi->saved_entryset); |
750 | xfree (pi->saved_exitset); | |
b8c9b27d | 751 | xfree (pi); |
c3f6f71d | 752 | } |
c906108c | 753 | |
c3f6f71d | 754 | static void |
fba45db2 | 755 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
756 | { |
757 | procinfo *tmp; | |
c906108c | 758 | |
c3f6f71d JM |
759 | if (pi->tid != 0) /* destroy a thread procinfo */ |
760 | { | |
761 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
762 | destroy_one_procinfo (&tmp->thread_list, pi); | |
763 | } | |
764 | else /* destroy a process procinfo and all its threads */ | |
765 | { | |
766 | /* First destroy the children, if any; */ | |
767 | while (pi->thread_list != NULL) | |
768 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
769 | /* Then destroy the parent. Genocide!!! */ | |
770 | destroy_one_procinfo (&procinfo_list, pi); | |
771 | } | |
772 | } | |
c906108c | 773 | |
004527cb AC |
774 | static void |
775 | do_destroy_procinfo_cleanup (void *pi) | |
776 | { | |
777 | destroy_procinfo (pi); | |
778 | } | |
779 | ||
c3f6f71d | 780 | enum { NOKILL, KILL }; |
c906108c | 781 | |
c3f6f71d JM |
782 | /* |
783 | * Function: dead_procinfo | |
784 | * | |
785 | * To be called on a non_recoverable error for a procinfo. | |
786 | * Prints error messages, optionally sends a SIGKILL to the process, | |
787 | * then destroys the data structure. | |
788 | */ | |
c906108c | 789 | |
c3f6f71d | 790 | static void |
fba45db2 | 791 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
792 | { |
793 | char procfile[80]; | |
c906108c | 794 | |
c3f6f71d JM |
795 | if (pi->pathname) |
796 | { | |
797 | print_sys_errmsg (pi->pathname, errno); | |
798 | } | |
799 | else | |
800 | { | |
801 | sprintf (procfile, "process %d", pi->pid); | |
802 | print_sys_errmsg (procfile, errno); | |
803 | } | |
804 | if (kill_p == KILL) | |
805 | kill (pi->pid, SIGKILL); | |
c906108c | 806 | |
c3f6f71d JM |
807 | destroy_procinfo (pi); |
808 | error (msg); | |
809 | } | |
c906108c | 810 | |
37de36c6 KB |
811 | /* |
812 | * Function: sysset_t_size | |
813 | * | |
814 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
815 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
816 | * size of sysset_t isn't known until runtime. | |
817 | */ | |
818 | ||
819 | static int | |
820 | sysset_t_size (procinfo * pi) | |
821 | { | |
822 | #ifndef DYNAMIC_SYSCALLS | |
823 | return sizeof (sysset_t); | |
824 | #else | |
825 | return sizeof (sysset_t) - sizeof (uint64_t) | |
826 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
827 | / (8 * sizeof (uint64_t))); | |
828 | #endif | |
829 | } | |
830 | ||
831 | /* Function: sysset_t_alloc | |
832 | ||
833 | Allocate and (partially) initialize a sysset_t struct. */ | |
834 | ||
835 | static sysset_t * | |
836 | sysset_t_alloc (procinfo * pi) | |
837 | { | |
838 | sysset_t *ret; | |
839 | int size = sysset_t_size (pi); | |
840 | ret = xmalloc (size); | |
841 | #ifdef DYNAMIC_SYSCALLS | |
842 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
843 | / (8 * sizeof (uint64_t)); | |
844 | #endif | |
845 | return ret; | |
846 | } | |
847 | ||
848 | #ifdef DYNAMIC_SYSCALLS | |
849 | ||
850 | /* Function: load_syscalls | |
851 | ||
852 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize | |
853 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
854 | with the names. (Certain numbers may be skipped in which case the | |
855 | names for these numbers will be left as NULL.) */ | |
856 | ||
857 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
858 | #define MAX_SYSCALLS 65536 | |
859 | ||
860 | static void | |
861 | load_syscalls (procinfo *pi) | |
862 | { | |
863 | char pathname[MAX_PROC_NAME_SIZE]; | |
864 | int sysent_fd; | |
865 | prsysent_t header; | |
866 | prsyscall_t *syscalls; | |
867 | int i, size, maxcall; | |
868 | ||
869 | pi->num_syscalls = 0; | |
870 | pi->syscall_names = 0; | |
871 | ||
872 | /* Open the file descriptor for the sysent file */ | |
873 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 874 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
875 | if (sysent_fd < 0) |
876 | { | |
877 | error ("load_syscalls: Can't open /proc/%d/sysent", pi->pid); | |
878 | } | |
879 | ||
880 | size = sizeof header - sizeof (prsyscall_t); | |
881 | if (read (sysent_fd, &header, size) != size) | |
882 | { | |
883 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
884 | } | |
885 | ||
886 | if (header.pr_nsyscalls == 0) | |
887 | { | |
888 | error ("load_syscalls: /proc/%d/sysent contains no syscalls!", pi->pid); | |
889 | } | |
890 | ||
891 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
892 | syscalls = xmalloc (size); | |
893 | ||
894 | if (read (sysent_fd, syscalls, size) != size) | |
895 | { | |
896 | xfree (syscalls); | |
897 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
898 | } | |
899 | ||
900 | /* Find maximum syscall number. This may not be the same as | |
901 | pr_nsyscalls since that value refers to the number of entries | |
902 | in the table. (Also, the docs indicate that some system | |
903 | call numbers may be skipped.) */ | |
904 | ||
905 | maxcall = syscalls[0].pr_number; | |
906 | ||
907 | for (i = 1; i < header.pr_nsyscalls; i++) | |
908 | if (syscalls[i].pr_number > maxcall | |
909 | && syscalls[i].pr_nameoff > 0 | |
910 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
911 | maxcall = syscalls[i].pr_number; | |
912 | ||
913 | pi->num_syscalls = maxcall+1; | |
914 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
915 | ||
916 | for (i = 0; i < pi->num_syscalls; i++) | |
917 | pi->syscall_names[i] = NULL; | |
918 | ||
919 | /* Read the syscall names in */ | |
920 | for (i = 0; i < header.pr_nsyscalls; i++) | |
921 | { | |
922 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
923 | int nread; | |
924 | int callnum; | |
925 | ||
926 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
927 | || syscalls[i].pr_number < 0 | |
928 | || syscalls[i].pr_nameoff <= 0 | |
929 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
930 | != (off_t) syscalls[i].pr_nameoff)) | |
931 | continue; | |
932 | ||
933 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
934 | if (nread <= 0) | |
935 | continue; | |
936 | ||
937 | callnum = syscalls[i].pr_number; | |
938 | ||
939 | if (pi->syscall_names[callnum] != NULL) | |
940 | { | |
941 | /* FIXME: Generate warning */ | |
942 | continue; | |
943 | } | |
944 | ||
945 | namebuf[nread-1] = '\0'; | |
946 | size = strlen (namebuf) + 1; | |
947 | pi->syscall_names[callnum] = xmalloc (size); | |
948 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
949 | pi->syscall_names[callnum][size-1] = '\0'; | |
950 | } | |
951 | ||
952 | close (sysent_fd); | |
953 | xfree (syscalls); | |
954 | } | |
955 | ||
956 | /* Function: free_syscalls | |
957 | ||
958 | Free the space allocated for the syscall names from the procinfo | |
959 | structure. */ | |
960 | ||
961 | static void | |
962 | free_syscalls (procinfo *pi) | |
963 | { | |
964 | if (pi->syscall_names) | |
965 | { | |
966 | int i; | |
967 | ||
968 | for (i = 0; i < pi->num_syscalls; i++) | |
969 | if (pi->syscall_names[i] != NULL) | |
970 | xfree (pi->syscall_names[i]); | |
971 | ||
972 | xfree (pi->syscall_names); | |
973 | pi->syscall_names = 0; | |
974 | } | |
975 | } | |
976 | ||
977 | /* Function: find_syscall | |
978 | ||
979 | Given a name, look up (and return) the corresponding syscall number. | |
980 | If no match is found, return -1. */ | |
981 | ||
982 | static int | |
983 | find_syscall (procinfo *pi, char *name) | |
984 | { | |
985 | int i; | |
986 | for (i = 0; i < pi->num_syscalls; i++) | |
987 | { | |
988 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
989 | return i; | |
990 | } | |
991 | return -1; | |
992 | } | |
993 | #endif | |
994 | ||
c3f6f71d | 995 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 996 | |
c3f6f71d | 997 | /* =================== /proc "MODULE" =================== */ |
c906108c | 998 | |
c3f6f71d JM |
999 | /* |
1000 | * This "module" is the interface layer between the /proc system API | |
1001 | * and the gdb target vector functions. This layer consists of | |
1002 | * access functions that encapsulate each of the basic operations | |
1003 | * that we need to use from the /proc API. | |
1004 | * | |
1005 | * The main motivation for this layer is to hide the fact that | |
1006 | * there are two very different implementations of the /proc API. | |
1007 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1008 | * functions, we do our best to hide them all in here. | |
1009 | */ | |
c906108c | 1010 | |
a14ed312 KB |
1011 | int proc_get_status (procinfo * pi); |
1012 | long proc_flags (procinfo * pi); | |
1013 | int proc_why (procinfo * pi); | |
1014 | int proc_what (procinfo * pi); | |
1015 | int proc_set_run_on_last_close (procinfo * pi); | |
1016 | int proc_unset_run_on_last_close (procinfo * pi); | |
1017 | int proc_set_inherit_on_fork (procinfo * pi); | |
1018 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1019 | int proc_set_async (procinfo * pi); | |
1020 | int proc_unset_async (procinfo * pi); | |
1021 | int proc_stop_process (procinfo * pi); | |
1022 | int proc_trace_signal (procinfo * pi, int signo); | |
1023 | int proc_ignore_signal (procinfo * pi, int signo); | |
1024 | int proc_clear_current_fault (procinfo * pi); | |
1025 | int proc_set_current_signal (procinfo * pi, int signo); | |
1026 | int proc_clear_current_signal (procinfo * pi); | |
1027 | int proc_set_gregs (procinfo * pi); | |
1028 | int proc_set_fpregs (procinfo * pi); | |
1029 | int proc_wait_for_stop (procinfo * pi); | |
1030 | int proc_run_process (procinfo * pi, int step, int signo); | |
1031 | int proc_kill (procinfo * pi, int signo); | |
1032 | int proc_parent_pid (procinfo * pi); | |
1033 | int proc_get_nthreads (procinfo * pi); | |
1034 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1035 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1036 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1037 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1038 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1039 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1040 | |
1041 | int proc_update_threads (procinfo * pi); | |
1042 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1043 | int (*func) (procinfo *, procinfo *, void *), |
1044 | void *ptr); | |
a14ed312 KB |
1045 | |
1046 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1047 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1048 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1049 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1050 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1051 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1052 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1053 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1054 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1055 | |
1056 | void proc_warn (procinfo * pi, char *func, int line); | |
1057 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1058 | |
c3f6f71d | 1059 | void |
fba45db2 | 1060 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1061 | { |
1062 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1063 | print_sys_errmsg (errmsg, errno); | |
1064 | } | |
c906108c | 1065 | |
c3f6f71d | 1066 | void |
fba45db2 | 1067 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1068 | { |
1069 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1070 | perror_with_name (errmsg); | |
1071 | } | |
c906108c | 1072 | |
c3f6f71d JM |
1073 | /* |
1074 | * Function: proc_get_status | |
1075 | * | |
1076 | * Updates the status struct in the procinfo. | |
1077 | * There is a 'valid' flag, to let other functions know when | |
1078 | * this function needs to be called (so the status is only | |
1079 | * read when it is needed). The status file descriptor is | |
1080 | * also only opened when it is needed. | |
1081 | * | |
1082 | * Return: non-zero for success, zero for failure. | |
1083 | */ | |
c906108c | 1084 | |
c3f6f71d | 1085 | int |
fba45db2 | 1086 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1087 | { |
1088 | /* Status file descriptor is opened "lazily" */ | |
1089 | if (pi->status_fd == 0 && | |
1090 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1091 | { | |
1092 | pi->status_valid = 0; | |
1093 | return 0; | |
1094 | } | |
c906108c | 1095 | |
c3f6f71d JM |
1096 | #ifdef NEW_PROC_API |
1097 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1098 | pi->status_valid = 0; /* fail */ | |
1099 | else | |
1100 | { | |
1101 | /* Sigh... I have to read a different data structure, | |
1102 | depending on whether this is a main process or an LWP. */ | |
1103 | if (pi->tid) | |
1104 | pi->status_valid = (read (pi->status_fd, | |
1105 | (char *) &pi->prstatus.pr_lwp, | |
1106 | sizeof (lwpstatus_t)) | |
1107 | == sizeof (lwpstatus_t)); | |
1108 | else | |
1109 | { | |
1110 | pi->status_valid = (read (pi->status_fd, | |
1111 | (char *) &pi->prstatus, | |
1112 | sizeof (gdb_prstatus_t)) | |
1113 | == sizeof (gdb_prstatus_t)); | |
1114 | #if 0 /*def UNIXWARE*/ | |
1115 | if (pi->status_valid && | |
1116 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1117 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1118 | /* Unixware peculiarity -- read the damn thing again! */ | |
1119 | pi->status_valid = (read (pi->status_fd, | |
1120 | (char *) &pi->prstatus, | |
1121 | sizeof (gdb_prstatus_t)) | |
1122 | == sizeof (gdb_prstatus_t)); | |
1123 | #endif /* UNIXWARE */ | |
1124 | } | |
1125 | } | |
1126 | #else /* ioctl method */ | |
1127 | #ifdef PIOCTSTATUS /* osf */ | |
1128 | if (pi->tid == 0) /* main process */ | |
1129 | { | |
1130 | /* Just read the danged status. Now isn't that simple? */ | |
1131 | pi->status_valid = | |
1132 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1133 | } | |
1134 | else | |
1135 | { | |
1136 | int win; | |
1137 | struct { | |
1138 | long pr_count; | |
1139 | tid_t pr_error_thread; | |
1140 | struct prstatus status; | |
1141 | } thread_status; | |
1142 | ||
1143 | thread_status.pr_count = 1; | |
1144 | thread_status.status.pr_tid = pi->tid; | |
1145 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1146 | if (win) | |
1147 | { | |
1148 | memcpy (&pi->prstatus, &thread_status.status, | |
1149 | sizeof (pi->prstatus)); | |
1150 | pi->status_valid = 1; | |
1151 | } | |
1152 | } | |
1153 | #else | |
1154 | /* Just read the danged status. Now isn't that simple? */ | |
1155 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1156 | #endif | |
1157 | #endif | |
c906108c | 1158 | |
c3f6f71d JM |
1159 | if (pi->status_valid) |
1160 | { | |
1161 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1162 | proc_why (pi), | |
1163 | proc_what (pi), | |
1164 | proc_get_current_thread (pi)); | |
1165 | } | |
c906108c | 1166 | |
c3f6f71d JM |
1167 | /* The status struct includes general regs, so mark them valid too */ |
1168 | pi->gregs_valid = pi->status_valid; | |
1169 | #ifdef NEW_PROC_API | |
1170 | /* In the read/write multiple-fd model, | |
1171 | the status struct includes the fp regs too, so mark them valid too */ | |
1172 | pi->fpregs_valid = pi->status_valid; | |
1173 | #endif | |
1174 | return pi->status_valid; /* True if success, false if failure. */ | |
1175 | } | |
c906108c | 1176 | |
c3f6f71d JM |
1177 | /* |
1178 | * Function: proc_flags | |
1179 | * | |
1180 | * returns the process flags (pr_flags field). | |
1181 | */ | |
1182 | ||
1183 | long | |
fba45db2 | 1184 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1185 | { |
1186 | if (!pi->status_valid) | |
1187 | if (!proc_get_status (pi)) | |
1188 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1189 | |
c3f6f71d | 1190 | #ifdef NEW_PROC_API |
0d06e24b JM |
1191 | # ifdef UNIXWARE |
1192 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1193 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1194 | The two sets of flags don't overlap. */ | |
1195 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1196 | # else | |
c3f6f71d | 1197 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1198 | # endif |
c3f6f71d JM |
1199 | #else |
1200 | return pi->prstatus.pr_flags; | |
1201 | #endif | |
1202 | } | |
c906108c | 1203 | |
c3f6f71d JM |
1204 | /* |
1205 | * Function: proc_why | |
1206 | * | |
1207 | * returns the pr_why field (why the process stopped). | |
1208 | */ | |
c906108c | 1209 | |
c3f6f71d | 1210 | int |
fba45db2 | 1211 | proc_why (procinfo *pi) |
c3f6f71d JM |
1212 | { |
1213 | if (!pi->status_valid) | |
1214 | if (!proc_get_status (pi)) | |
1215 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1216 | |
c3f6f71d JM |
1217 | #ifdef NEW_PROC_API |
1218 | return pi->prstatus.pr_lwp.pr_why; | |
1219 | #else | |
1220 | return pi->prstatus.pr_why; | |
1221 | #endif | |
1222 | } | |
c906108c | 1223 | |
c3f6f71d JM |
1224 | /* |
1225 | * Function: proc_what | |
1226 | * | |
1227 | * returns the pr_what field (details of why the process stopped). | |
1228 | */ | |
c906108c | 1229 | |
c3f6f71d | 1230 | int |
fba45db2 | 1231 | proc_what (procinfo *pi) |
c3f6f71d JM |
1232 | { |
1233 | if (!pi->status_valid) | |
1234 | if (!proc_get_status (pi)) | |
1235 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1236 | |
c3f6f71d JM |
1237 | #ifdef NEW_PROC_API |
1238 | return pi->prstatus.pr_lwp.pr_what; | |
1239 | #else | |
1240 | return pi->prstatus.pr_what; | |
c906108c | 1241 | #endif |
c3f6f71d | 1242 | } |
c906108c | 1243 | |
c3f6f71d JM |
1244 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1245 | /* | |
1246 | * Function: proc_nsysarg | |
1247 | * | |
1248 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1249 | */ | |
1250 | ||
1251 | int | |
fba45db2 | 1252 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1253 | { |
1254 | if (!pi->status_valid) | |
1255 | if (!proc_get_status (pi)) | |
1256 | return 0; | |
1257 | ||
1258 | #ifdef NEW_PROC_API | |
1259 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1260 | #else | |
1261 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1262 | #endif |
c3f6f71d | 1263 | } |
c906108c | 1264 | |
c3f6f71d JM |
1265 | /* |
1266 | * Function: proc_sysargs | |
1267 | * | |
1268 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1269 | */ | |
c906108c | 1270 | |
c3f6f71d | 1271 | long * |
fba45db2 | 1272 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1273 | { |
1274 | if (!pi->status_valid) | |
1275 | if (!proc_get_status (pi)) | |
1276 | return NULL; | |
1277 | ||
1278 | #ifdef NEW_PROC_API | |
1279 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1280 | #else | |
1281 | return (long *) &pi->prstatus.pr_sysarg; | |
1282 | #endif | |
1283 | } | |
c906108c | 1284 | |
c3f6f71d JM |
1285 | /* |
1286 | * Function: proc_syscall | |
1287 | * | |
1288 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1289 | */ | |
c906108c | 1290 | |
c3f6f71d | 1291 | int |
fba45db2 | 1292 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1293 | { |
1294 | if (!pi->status_valid) | |
1295 | if (!proc_get_status (pi)) | |
1296 | return 0; | |
1297 | ||
1298 | #ifdef NEW_PROC_API | |
1299 | return pi->prstatus.pr_lwp.pr_syscall; | |
1300 | #else | |
1301 | return pi->prstatus.pr_syscall; | |
1302 | #endif | |
1303 | } | |
1304 | #endif /* PIOCSSPCACT */ | |
c906108c | 1305 | |
c3f6f71d JM |
1306 | /* |
1307 | * Function: proc_cursig: | |
1308 | * | |
1309 | * returns the pr_cursig field (current signal). | |
1310 | */ | |
c906108c | 1311 | |
c3f6f71d JM |
1312 | long |
1313 | proc_cursig (struct procinfo *pi) | |
1314 | { | |
1315 | if (!pi->status_valid) | |
1316 | if (!proc_get_status (pi)) | |
1317 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1318 | |
c3f6f71d JM |
1319 | #ifdef NEW_PROC_API |
1320 | return pi->prstatus.pr_lwp.pr_cursig; | |
1321 | #else | |
1322 | return pi->prstatus.pr_cursig; | |
1323 | #endif | |
1324 | } | |
c906108c | 1325 | |
c3f6f71d | 1326 | /* |
0d06e24b | 1327 | * Function: proc_modify_flag |
c3f6f71d JM |
1328 | * |
1329 | * === I appologize for the messiness of this function. | |
1330 | * === This is an area where the different versions of | |
1331 | * === /proc are more inconsistent than usual. MVS | |
1332 | * | |
1333 | * Set or reset any of the following process flags: | |
1334 | * PR_FORK -- forked child will inherit trace flags | |
1335 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1336 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1337 | * PR_ASYNC -- LWP's get to run/stop independently. |
1338 | * | |
1339 | * There are three methods for doing this function: | |
1340 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1341 | * [Sol6, Sol7, UW] | |
1342 | * 2) Middle: PIOCSET/PIOCRESET | |
1343 | * [Irix, Sol5] | |
1344 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1345 | * [OSF, Sol5] | |
1346 | * | |
1347 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1348 | * Note: OSF does not define PR_KLC. |
1349 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1350 | * |
1351 | * Arguments: | |
1352 | * pi -- the procinfo | |
1353 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1354 | * mode -- 1 for set, 0 for reset. | |
1355 | * | |
1356 | * Returns non-zero for success, zero for failure. | |
1357 | */ | |
c906108c | 1358 | |
c3f6f71d | 1359 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1360 | |
c3f6f71d | 1361 | static int |
fba45db2 | 1362 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1363 | { |
1364 | long win = 0; /* default to fail */ | |
1365 | ||
1366 | /* | |
1367 | * These operations affect the process as a whole, and applying | |
1368 | * them to an individual LWP has the same meaning as applying them | |
1369 | * to the main process. Therefore, if we're ever called with a | |
1370 | * pointer to an LWP's procinfo, let's substitute the process's | |
1371 | * procinfo and avoid opening the LWP's file descriptor | |
1372 | * unnecessarily. | |
1373 | */ | |
1374 | ||
1375 | if (pi->pid != 0) | |
1376 | pi = find_procinfo_or_die (pi->pid, 0); | |
1377 | ||
1378 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1379 | /* First normalize the PCUNSET/PCRESET command opcode | |
1380 | (which for no obvious reason has a different definition | |
1381 | from one operating system to the next...) */ | |
1382 | #ifdef PCUNSET | |
1383 | #define GDBRESET PCUNSET | |
37de36c6 | 1384 | #else |
c3f6f71d JM |
1385 | #ifdef PCRESET |
1386 | #define GDBRESET PCRESET | |
37de36c6 | 1387 | #endif |
c906108c | 1388 | #endif |
c3f6f71d | 1389 | { |
37de36c6 | 1390 | procfs_ctl_t arg[2]; |
c906108c | 1391 | |
c3f6f71d JM |
1392 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1393 | arg[0] = PCSET; | |
1394 | else /* Reset the flag */ | |
1395 | arg[0] = GDBRESET; | |
c5aa993b | 1396 | |
c3f6f71d JM |
1397 | arg[1] = flag; |
1398 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1399 | } | |
1400 | #else | |
1401 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1402 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1403 | { | |
1404 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1405 | } | |
1406 | else /* Reset the flag */ | |
1407 | { | |
1408 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1409 | } | |
c906108c | 1410 | |
c3f6f71d JM |
1411 | #else |
1412 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1413 | switch (flag) { | |
1414 | case PR_RLC: | |
1415 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1416 | { | |
1417 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1418 | } | |
1419 | else /* Clear run-on-last-close */ | |
1420 | { | |
1421 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1422 | } | |
1423 | break; | |
1424 | case PR_FORK: | |
1425 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1426 | { | |
1427 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1428 | } | |
1429 | else /* Clear inherit-on-fork */ | |
1430 | { | |
1431 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1432 | } | |
1433 | break; | |
1434 | default: | |
1435 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1436 | break; | |
1437 | } | |
1438 | #endif | |
1439 | #endif | |
1440 | #endif | |
1441 | #undef GDBRESET | |
1442 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1443 | pi->status_valid = 0; | |
c906108c | 1444 | |
c3f6f71d JM |
1445 | if (!win) |
1446 | warning ("procfs: modify_flag failed to turn %s %s", | |
1447 | flag == PR_FORK ? "PR_FORK" : | |
1448 | flag == PR_RLC ? "PR_RLC" : | |
1449 | #ifdef PR_ASYNC | |
1450 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1451 | #endif |
1452 | #ifdef PR_KLC | |
1453 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1454 | #endif |
1455 | "<unknown flag>", | |
1456 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1457 | |
c3f6f71d JM |
1458 | return win; |
1459 | } | |
c906108c | 1460 | |
c3f6f71d JM |
1461 | /* |
1462 | * Function: proc_set_run_on_last_close | |
1463 | * | |
1464 | * Set the run_on_last_close flag. | |
1465 | * Process with all threads will become runnable | |
1466 | * when debugger closes all /proc fds. | |
1467 | * | |
1468 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1469 | */ |
1470 | ||
c3f6f71d | 1471 | int |
fba45db2 | 1472 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1473 | { |
c3f6f71d JM |
1474 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1475 | } | |
c906108c | 1476 | |
c3f6f71d JM |
1477 | /* |
1478 | * Function: proc_unset_run_on_last_close | |
1479 | * | |
1480 | * Reset the run_on_last_close flag. | |
1481 | * Process will NOT become runnable | |
1482 | * when debugger closes its file handles. | |
1483 | * | |
1484 | * Returns non-zero for success, zero for failure. | |
1485 | */ | |
c906108c | 1486 | |
c3f6f71d | 1487 | int |
fba45db2 | 1488 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1489 | { |
1490 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1491 | } |
1492 | ||
0d06e24b JM |
1493 | #ifdef PR_KLC |
1494 | /* | |
1495 | * Function: proc_set_kill_on_last_close | |
1496 | * | |
1497 | * Set the kill_on_last_close flag. | |
1498 | * Process with all threads will be killed when debugger | |
1499 | * closes all /proc fds (or debugger exits or dies). | |
1500 | * | |
1501 | * Returns non-zero for success, zero for failure. | |
1502 | */ | |
1503 | ||
1504 | int | |
fba45db2 | 1505 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1506 | { |
1507 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1508 | } | |
1509 | ||
1510 | /* | |
1511 | * Function: proc_unset_kill_on_last_close | |
1512 | * | |
1513 | * Reset the kill_on_last_close flag. | |
1514 | * Process will NOT be killed when debugger | |
1515 | * closes its file handles (or exits or dies). | |
1516 | * | |
1517 | * Returns non-zero for success, zero for failure. | |
1518 | */ | |
1519 | ||
1520 | int | |
fba45db2 | 1521 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1522 | { |
1523 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1524 | } | |
1525 | #endif /* PR_KLC */ | |
1526 | ||
c906108c | 1527 | /* |
c3f6f71d JM |
1528 | * Function: proc_set_inherit_on_fork |
1529 | * | |
1530 | * Set inherit_on_fork flag. | |
1531 | * If the process forks a child while we are registered for events | |
1532 | * in the parent, then we will also recieve events from the child. | |
1533 | * | |
1534 | * Returns non-zero for success, zero for failure. | |
1535 | */ | |
c906108c | 1536 | |
c3f6f71d | 1537 | int |
fba45db2 | 1538 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1539 | { |
1540 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1541 | } | |
c5aa993b | 1542 | |
c3f6f71d JM |
1543 | /* |
1544 | * Function: proc_unset_inherit_on_fork | |
1545 | * | |
1546 | * Reset inherit_on_fork flag. | |
1547 | * If the process forks a child while we are registered for events | |
1548 | * in the parent, then we will NOT recieve events from the child. | |
1549 | * | |
1550 | * Returns non-zero for success, zero for failure. | |
1551 | */ | |
c906108c | 1552 | |
c3f6f71d | 1553 | int |
fba45db2 | 1554 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1555 | { |
1556 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1557 | } | |
c906108c | 1558 | |
c3f6f71d JM |
1559 | #ifdef PR_ASYNC |
1560 | /* | |
1561 | * Function: proc_set_async | |
1562 | * | |
1563 | * Set PR_ASYNC flag. | |
1564 | * If one LWP stops because of a debug event (signal etc.), | |
1565 | * the remaining LWPs will continue to run. | |
1566 | * | |
1567 | * Returns non-zero for success, zero for failure. | |
1568 | */ | |
c906108c | 1569 | |
c3f6f71d | 1570 | int |
fba45db2 | 1571 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1572 | { |
1573 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1574 | } | |
c906108c | 1575 | |
c3f6f71d JM |
1576 | /* |
1577 | * Function: proc_unset_async | |
1578 | * | |
1579 | * Reset PR_ASYNC flag. | |
1580 | * If one LWP stops because of a debug event (signal etc.), | |
1581 | * then all other LWPs will stop as well. | |
1582 | * | |
1583 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1584 | */ |
1585 | ||
c3f6f71d | 1586 | int |
fba45db2 | 1587 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1588 | { |
1589 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1590 | } | |
1591 | #endif /* PR_ASYNC */ | |
c906108c SS |
1592 | |
1593 | /* | |
c3f6f71d JM |
1594 | * Function: proc_stop_process |
1595 | * | |
1596 | * Request the process/LWP to stop. Does not wait. | |
1597 | * Returns non-zero for success, zero for failure. | |
1598 | */ | |
c906108c | 1599 | |
c3f6f71d | 1600 | int |
fba45db2 | 1601 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1602 | { |
1603 | int win; | |
c906108c | 1604 | |
c3f6f71d JM |
1605 | /* |
1606 | * We might conceivably apply this operation to an LWP, and | |
1607 | * the LWP's ctl file descriptor might not be open. | |
1608 | */ | |
c906108c | 1609 | |
c3f6f71d JM |
1610 | if (pi->ctl_fd == 0 && |
1611 | open_procinfo_files (pi, FD_CTL) == 0) | |
1612 | return 0; | |
1613 | else | |
1614 | { | |
1615 | #ifdef NEW_PROC_API | |
37de36c6 | 1616 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1617 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1618 | #else /* ioctl method */ | |
1619 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1620 | /* Note: the call also reads the prstatus. */ | |
1621 | if (win) | |
1622 | { | |
1623 | pi->status_valid = 1; | |
1624 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1625 | proc_why (pi), | |
1626 | proc_what (pi), | |
1627 | proc_get_current_thread (pi)); | |
1628 | } | |
1629 | #endif | |
1630 | } | |
c906108c | 1631 | |
c3f6f71d JM |
1632 | return win; |
1633 | } | |
c5aa993b | 1634 | |
c3f6f71d JM |
1635 | /* |
1636 | * Function: proc_wait_for_stop | |
1637 | * | |
1638 | * Wait for the process or LWP to stop (block until it does). | |
1639 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1640 | */ |
1641 | ||
c3f6f71d | 1642 | int |
fba45db2 | 1643 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1644 | { |
c3f6f71d JM |
1645 | int win; |
1646 | ||
1647 | /* | |
1648 | * We should never have to apply this operation to any procinfo | |
1649 | * except the one for the main process. If that ever changes | |
1650 | * for any reason, then take out the following clause and | |
1651 | * replace it with one that makes sure the ctl_fd is open. | |
1652 | */ | |
1653 | ||
1654 | if (pi->tid != 0) | |
1655 | pi = find_procinfo_or_die (pi->pid, 0); | |
1656 | ||
1657 | #ifdef NEW_PROC_API | |
1658 | { | |
37de36c6 | 1659 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1660 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1661 | /* We been runnin' and we stopped -- need to update status. */ | |
1662 | pi->status_valid = 0; | |
1663 | } | |
1664 | #else /* ioctl method */ | |
1665 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1666 | /* Above call also refreshes the prstatus. */ | |
1667 | if (win) | |
1668 | { | |
1669 | pi->status_valid = 1; | |
1670 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1671 | proc_why (pi), | |
1672 | proc_what (pi), | |
1673 | proc_get_current_thread (pi)); | |
1674 | } | |
c906108c SS |
1675 | #endif |
1676 | ||
c3f6f71d | 1677 | return win; |
c906108c SS |
1678 | } |
1679 | ||
1680 | /* | |
c3f6f71d JM |
1681 | * Function: proc_run_process |
1682 | * | |
1683 | * Make the process or LWP runnable. | |
1684 | * Options (not all are implemented): | |
1685 | * - single-step | |
1686 | * - clear current fault | |
1687 | * - clear current signal | |
1688 | * - abort the current system call | |
1689 | * - stop as soon as finished with system call | |
1690 | * - (ioctl): set traced signal set | |
1691 | * - (ioctl): set held signal set | |
1692 | * - (ioctl): set traced fault set | |
1693 | * - (ioctl): set start pc (vaddr) | |
1694 | * Always clear the current fault. | |
1695 | * Clear the current signal if 'signo' is zero. | |
1696 | * | |
1697 | * Arguments: | |
1698 | * pi the process or LWP to operate on. | |
1699 | * step if true, set the process or LWP to trap after one instr. | |
1700 | * signo if zero, clear the current signal if any. | |
1701 | * if non-zero, set the current signal to this one. | |
1702 | * | |
1703 | * Returns non-zero for success, zero for failure. | |
1704 | */ | |
1705 | ||
1706 | int | |
fba45db2 | 1707 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1708 | { |
1709 | int win; | |
1710 | int runflags; | |
1711 | ||
1712 | /* | |
1713 | * We will probably have to apply this operation to individual threads, | |
1714 | * so make sure the control file descriptor is open. | |
1715 | */ | |
1716 | ||
1717 | if (pi->ctl_fd == 0 && | |
1718 | open_procinfo_files (pi, FD_CTL) == 0) | |
1719 | { | |
1720 | return 0; | |
1721 | } | |
c906108c | 1722 | |
c3f6f71d JM |
1723 | runflags = PRCFAULT; /* always clear current fault */ |
1724 | if (step) | |
1725 | runflags |= PRSTEP; | |
1726 | if (signo == 0) | |
1727 | runflags |= PRCSIG; | |
1728 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1729 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1730 | |
c3f6f71d JM |
1731 | #ifdef NEW_PROC_API |
1732 | { | |
37de36c6 | 1733 | procfs_ctl_t cmd[2]; |
c906108c | 1734 | |
c3f6f71d JM |
1735 | cmd[0] = PCRUN; |
1736 | cmd[1] = runflags; | |
1737 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1738 | } | |
1739 | #else /* ioctl method */ | |
1740 | { | |
1741 | prrun_t prrun; | |
c906108c | 1742 | |
c3f6f71d JM |
1743 | memset (&prrun, 0, sizeof (prrun)); |
1744 | prrun.pr_flags = runflags; | |
1745 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1746 | } | |
1747 | #endif | |
c906108c | 1748 | |
c3f6f71d JM |
1749 | return win; |
1750 | } | |
c906108c | 1751 | |
c3f6f71d JM |
1752 | /* |
1753 | * Function: proc_set_traced_signals | |
1754 | * | |
1755 | * Register to trace signals in the process or LWP. | |
1756 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1757 | */ |
1758 | ||
c3f6f71d | 1759 | int |
37de36c6 | 1760 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1761 | { |
c3f6f71d JM |
1762 | int win; |
1763 | ||
1764 | /* | |
1765 | * We should never have to apply this operation to any procinfo | |
1766 | * except the one for the main process. If that ever changes | |
1767 | * for any reason, then take out the following clause and | |
1768 | * replace it with one that makes sure the ctl_fd is open. | |
1769 | */ | |
1770 | ||
1771 | if (pi->tid != 0) | |
1772 | pi = find_procinfo_or_die (pi->pid, 0); | |
1773 | ||
1774 | #ifdef NEW_PROC_API | |
1775 | { | |
1776 | struct { | |
37de36c6 | 1777 | procfs_ctl_t cmd; |
c3f6f71d | 1778 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1779 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1780 | } arg; |
c906108c | 1781 | |
c3f6f71d | 1782 | arg.cmd = PCSTRACE; |
37de36c6 | 1783 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1784 | |
c3f6f71d JM |
1785 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1786 | } | |
1787 | #else /* ioctl method */ | |
1788 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1789 | #endif | |
1790 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1791 | pi->status_valid = 0; | |
c906108c | 1792 | |
c3f6f71d JM |
1793 | if (!win) |
1794 | warning ("procfs: set_traced_signals failed"); | |
1795 | return win; | |
c906108c SS |
1796 | } |
1797 | ||
1798 | /* | |
c3f6f71d JM |
1799 | * Function: proc_set_traced_faults |
1800 | * | |
1801 | * Register to trace hardware faults in the process or LWP. | |
1802 | * Returns non-zero for success, zero for failure. | |
1803 | */ | |
c906108c | 1804 | |
c3f6f71d | 1805 | int |
fba45db2 | 1806 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1807 | { |
1808 | int win; | |
1809 | ||
1810 | /* | |
1811 | * We should never have to apply this operation to any procinfo | |
1812 | * except the one for the main process. If that ever changes | |
1813 | * for any reason, then take out the following clause and | |
1814 | * replace it with one that makes sure the ctl_fd is open. | |
1815 | */ | |
1816 | ||
1817 | if (pi->tid != 0) | |
1818 | pi = find_procinfo_or_die (pi->pid, 0); | |
1819 | ||
1820 | #ifdef NEW_PROC_API | |
1821 | { | |
1822 | struct { | |
37de36c6 | 1823 | procfs_ctl_t cmd; |
c3f6f71d JM |
1824 | /* Use char array to avoid alignment issues. */ |
1825 | char fltset[sizeof (fltset_t)]; | |
1826 | } arg; | |
c906108c | 1827 | |
c3f6f71d JM |
1828 | arg.cmd = PCSFAULT; |
1829 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1830 | |
c3f6f71d JM |
1831 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1832 | } | |
1833 | #else /* ioctl method */ | |
1834 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1835 | #endif | |
1836 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1837 | pi->status_valid = 0; | |
c906108c | 1838 | |
c3f6f71d JM |
1839 | return win; |
1840 | } | |
c5aa993b | 1841 | |
c3f6f71d JM |
1842 | /* |
1843 | * Function: proc_set_traced_sysentry | |
1844 | * | |
1845 | * Register to trace entry to system calls in the process or LWP. | |
1846 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1847 | */ |
1848 | ||
c3f6f71d | 1849 | int |
fba45db2 | 1850 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1851 | { |
c3f6f71d JM |
1852 | int win; |
1853 | ||
1854 | /* | |
1855 | * We should never have to apply this operation to any procinfo | |
1856 | * except the one for the main process. If that ever changes | |
1857 | * for any reason, then take out the following clause and | |
1858 | * replace it with one that makes sure the ctl_fd is open. | |
1859 | */ | |
1860 | ||
1861 | if (pi->tid != 0) | |
1862 | pi = find_procinfo_or_die (pi->pid, 0); | |
1863 | ||
1864 | #ifdef NEW_PROC_API | |
1865 | { | |
37de36c6 KB |
1866 | struct gdb_proc_ctl_pcsentry { |
1867 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1868 | /* Use char array to avoid alignment issues. */ |
1869 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1870 | } *argp; |
1871 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1872 | - sizeof (sysset_t) | |
1873 | + sysset_t_size (pi); | |
c3f6f71d | 1874 | |
37de36c6 | 1875 | argp = xmalloc (argp_size); |
c3f6f71d | 1876 | |
37de36c6 KB |
1877 | argp->cmd = PCSENTRY; |
1878 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1879 | ||
1880 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1881 | xfree (argp); | |
c3f6f71d JM |
1882 | } |
1883 | #else /* ioctl method */ | |
1884 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1885 | #endif | |
1886 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1887 | pi->status_valid = 0; | |
1888 | ||
1889 | return win; | |
c906108c SS |
1890 | } |
1891 | ||
1892 | /* | |
c3f6f71d JM |
1893 | * Function: proc_set_traced_sysexit |
1894 | * | |
1895 | * Register to trace exit from system calls in the process or LWP. | |
1896 | * Returns non-zero for success, zero for failure. | |
1897 | */ | |
c906108c | 1898 | |
c3f6f71d | 1899 | int |
fba45db2 | 1900 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1901 | { |
1902 | int win; | |
1903 | ||
1904 | /* | |
1905 | * We should never have to apply this operation to any procinfo | |
1906 | * except the one for the main process. If that ever changes | |
1907 | * for any reason, then take out the following clause and | |
1908 | * replace it with one that makes sure the ctl_fd is open. | |
1909 | */ | |
1910 | ||
1911 | if (pi->tid != 0) | |
1912 | pi = find_procinfo_or_die (pi->pid, 0); | |
1913 | ||
1914 | #ifdef NEW_PROC_API | |
1915 | { | |
37de36c6 KB |
1916 | struct gdb_proc_ctl_pcsexit { |
1917 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1918 | /* Use char array to avoid alignment issues. */ |
1919 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1920 | } *argp; |
1921 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1922 | - sizeof (sysset_t) | |
1923 | + sysset_t_size (pi); | |
c906108c | 1924 | |
37de36c6 | 1925 | argp = xmalloc (argp_size); |
c906108c | 1926 | |
37de36c6 KB |
1927 | argp->cmd = PCSEXIT; |
1928 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1929 | ||
1930 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1931 | xfree (argp); | |
c3f6f71d JM |
1932 | } |
1933 | #else /* ioctl method */ | |
1934 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1935 | #endif | |
1936 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1937 | pi->status_valid = 0; | |
c906108c | 1938 | |
c3f6f71d JM |
1939 | return win; |
1940 | } | |
c906108c | 1941 | |
c3f6f71d JM |
1942 | /* |
1943 | * Function: proc_set_held_signals | |
1944 | * | |
1945 | * Specify the set of blocked / held signals in the process or LWP. | |
1946 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1947 | */ |
1948 | ||
c3f6f71d | 1949 | int |
37de36c6 | 1950 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1951 | { |
c3f6f71d JM |
1952 | int win; |
1953 | ||
1954 | /* | |
1955 | * We should never have to apply this operation to any procinfo | |
1956 | * except the one for the main process. If that ever changes | |
1957 | * for any reason, then take out the following clause and | |
1958 | * replace it with one that makes sure the ctl_fd is open. | |
1959 | */ | |
1960 | ||
1961 | if (pi->tid != 0) | |
1962 | pi = find_procinfo_or_die (pi->pid, 0); | |
1963 | ||
1964 | #ifdef NEW_PROC_API | |
1965 | { | |
1966 | struct { | |
37de36c6 | 1967 | procfs_ctl_t cmd; |
c3f6f71d | 1968 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1969 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1970 | } arg; |
1971 | ||
1972 | arg.cmd = PCSHOLD; | |
37de36c6 | 1973 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1974 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1975 | } | |
c906108c | 1976 | #else |
c3f6f71d | 1977 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1978 | #endif |
c3f6f71d JM |
1979 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1980 | pi->status_valid = 0; | |
1981 | ||
1982 | return win; | |
c906108c SS |
1983 | } |
1984 | ||
1985 | /* | |
c3f6f71d JM |
1986 | * Function: proc_get_pending_signals |
1987 | * | |
1988 | * returns the set of signals that are pending in the process or LWP. | |
1989 | * Will also copy the sigset if 'save' is non-zero. | |
1990 | */ | |
c906108c | 1991 | |
37de36c6 KB |
1992 | gdb_sigset_t * |
1993 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 1994 | { |
37de36c6 | 1995 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
1996 | |
1997 | /* | |
1998 | * We should never have to apply this operation to any procinfo | |
1999 | * except the one for the main process. If that ever changes | |
2000 | * for any reason, then take out the following clause and | |
2001 | * replace it with one that makes sure the ctl_fd is open. | |
2002 | */ | |
2003 | ||
2004 | if (pi->tid != 0) | |
2005 | pi = find_procinfo_or_die (pi->pid, 0); | |
2006 | ||
2007 | if (!pi->status_valid) | |
2008 | if (!proc_get_status (pi)) | |
2009 | return NULL; | |
2010 | ||
2011 | #ifdef NEW_PROC_API | |
2012 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2013 | #else | |
2014 | ret = &pi->prstatus.pr_sigpend; | |
2015 | #endif | |
2016 | if (save && ret) | |
37de36c6 | 2017 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2018 | |
c3f6f71d JM |
2019 | return ret; |
2020 | } | |
c906108c | 2021 | |
c3f6f71d JM |
2022 | /* |
2023 | * Function: proc_get_signal_actions | |
2024 | * | |
2025 | * returns the set of signal actions. | |
2026 | * Will also copy the sigactionset if 'save' is non-zero. | |
2027 | */ | |
c906108c | 2028 | |
37de36c6 KB |
2029 | gdb_sigaction_t * |
2030 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2031 | { |
37de36c6 | 2032 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2033 | |
2034 | /* | |
2035 | * We should never have to apply this operation to any procinfo | |
2036 | * except the one for the main process. If that ever changes | |
2037 | * for any reason, then take out the following clause and | |
2038 | * replace it with one that makes sure the ctl_fd is open. | |
2039 | */ | |
2040 | ||
2041 | if (pi->tid != 0) | |
2042 | pi = find_procinfo_or_die (pi->pid, 0); | |
2043 | ||
2044 | if (!pi->status_valid) | |
2045 | if (!proc_get_status (pi)) | |
2046 | return NULL; | |
2047 | ||
2048 | #ifdef NEW_PROC_API | |
2049 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2050 | #else | |
2051 | ret = &pi->prstatus.pr_action; | |
2052 | #endif | |
2053 | if (save && ret) | |
37de36c6 | 2054 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2055 | |
c3f6f71d JM |
2056 | return ret; |
2057 | } | |
c5aa993b | 2058 | |
c3f6f71d JM |
2059 | /* |
2060 | * Function: proc_get_held_signals | |
2061 | * | |
2062 | * returns the set of signals that are held / blocked. | |
2063 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2064 | */ |
2065 | ||
37de36c6 KB |
2066 | gdb_sigset_t * |
2067 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2068 | { |
37de36c6 | 2069 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2070 | |
2071 | /* | |
2072 | * We should never have to apply this operation to any procinfo | |
2073 | * except the one for the main process. If that ever changes | |
2074 | * for any reason, then take out the following clause and | |
2075 | * replace it with one that makes sure the ctl_fd is open. | |
2076 | */ | |
2077 | ||
2078 | if (pi->tid != 0) | |
2079 | pi = find_procinfo_or_die (pi->pid, 0); | |
2080 | ||
2081 | #ifdef NEW_PROC_API | |
2082 | if (!pi->status_valid) | |
2083 | if (!proc_get_status (pi)) | |
2084 | return NULL; | |
2085 | ||
2086 | #ifdef UNIXWARE | |
2087 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2088 | #else |
c3f6f71d JM |
2089 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2090 | #endif /* UNIXWARE */ | |
2091 | #else /* not NEW_PROC_API */ | |
2092 | { | |
37de36c6 | 2093 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2094 | |
2095 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2096 | ret = &sigheld; | |
2097 | } | |
2098 | #endif /* NEW_PROC_API */ | |
2099 | if (save && ret) | |
37de36c6 | 2100 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2101 | |
2102 | return ret; | |
c906108c SS |
2103 | } |
2104 | ||
c3f6f71d JM |
2105 | /* |
2106 | * Function: proc_get_traced_signals | |
2107 | * | |
2108 | * returns the set of signals that are traced / debugged. | |
2109 | * Will also copy the sigset if 'save' is non-zero. | |
2110 | */ | |
2111 | ||
37de36c6 KB |
2112 | gdb_sigset_t * |
2113 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2114 | { |
37de36c6 | 2115 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2116 | |
2117 | /* | |
2118 | * We should never have to apply this operation to any procinfo | |
2119 | * except the one for the main process. If that ever changes | |
2120 | * for any reason, then take out the following clause and | |
2121 | * replace it with one that makes sure the ctl_fd is open. | |
2122 | */ | |
2123 | ||
2124 | if (pi->tid != 0) | |
2125 | pi = find_procinfo_or_die (pi->pid, 0); | |
2126 | ||
2127 | #ifdef NEW_PROC_API | |
2128 | if (!pi->status_valid) | |
2129 | if (!proc_get_status (pi)) | |
2130 | return NULL; | |
2131 | ||
2132 | ret = &pi->prstatus.pr_sigtrace; | |
2133 | #else | |
2134 | { | |
37de36c6 | 2135 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2136 | |
2137 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2138 | ret = &sigtrace; | |
2139 | } | |
c906108c | 2140 | #endif |
c3f6f71d | 2141 | if (save && ret) |
37de36c6 | 2142 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2143 | |
c3f6f71d JM |
2144 | return ret; |
2145 | } | |
c906108c | 2146 | |
c3f6f71d JM |
2147 | /* |
2148 | * Function: proc_trace_signal | |
2149 | * | |
2150 | * Add 'signo' to the set of signals that are traced. | |
2151 | * Returns non-zero for success, zero for failure. | |
2152 | */ | |
c906108c | 2153 | |
c3f6f71d | 2154 | int |
fba45db2 | 2155 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2156 | { |
37de36c6 | 2157 | gdb_sigset_t temp; |
c3f6f71d JM |
2158 | |
2159 | /* | |
2160 | * We should never have to apply this operation to any procinfo | |
2161 | * except the one for the main process. If that ever changes | |
2162 | * for any reason, then take out the following clause and | |
2163 | * replace it with one that makes sure the ctl_fd is open. | |
2164 | */ | |
2165 | ||
2166 | if (pi->tid != 0) | |
2167 | pi = find_procinfo_or_die (pi->pid, 0); | |
2168 | ||
2169 | if (pi) | |
c906108c | 2170 | { |
c3f6f71d | 2171 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2172 | { |
c3f6f71d JM |
2173 | praddset (&temp, signo); |
2174 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
2175 | } |
2176 | } | |
c5aa993b | 2177 | |
c3f6f71d JM |
2178 | return 0; /* failure */ |
2179 | } | |
c906108c | 2180 | |
c3f6f71d JM |
2181 | /* |
2182 | * Function: proc_ignore_signal | |
2183 | * | |
2184 | * Remove 'signo' from the set of signals that are traced. | |
2185 | * Returns non-zero for success, zero for failure. | |
2186 | */ | |
c906108c | 2187 | |
c3f6f71d | 2188 | int |
fba45db2 | 2189 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2190 | { |
37de36c6 | 2191 | gdb_sigset_t temp; |
c3f6f71d JM |
2192 | |
2193 | /* | |
2194 | * We should never have to apply this operation to any procinfo | |
2195 | * except the one for the main process. If that ever changes | |
2196 | * for any reason, then take out the following clause and | |
2197 | * replace it with one that makes sure the ctl_fd is open. | |
2198 | */ | |
2199 | ||
2200 | if (pi->tid != 0) | |
2201 | pi = find_procinfo_or_die (pi->pid, 0); | |
2202 | ||
2203 | if (pi) | |
c906108c | 2204 | { |
c3f6f71d | 2205 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2206 | { |
c3f6f71d JM |
2207 | prdelset (&temp, signo); |
2208 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 2209 | } |
c906108c | 2210 | } |
c906108c | 2211 | |
c3f6f71d | 2212 | return 0; /* failure */ |
c906108c SS |
2213 | } |
2214 | ||
2215 | /* | |
c3f6f71d JM |
2216 | * Function: proc_get_traced_faults |
2217 | * | |
2218 | * returns the set of hardware faults that are traced /debugged. | |
2219 | * Will also copy the faultset if 'save' is non-zero. | |
2220 | */ | |
2221 | ||
2222 | fltset_t * | |
fba45db2 | 2223 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2224 | { |
2225 | fltset_t *ret = NULL; | |
2226 | ||
2227 | /* | |
2228 | * We should never have to apply this operation to any procinfo | |
2229 | * except the one for the main process. If that ever changes | |
2230 | * for any reason, then take out the following clause and | |
2231 | * replace it with one that makes sure the ctl_fd is open. | |
2232 | */ | |
2233 | ||
2234 | if (pi->tid != 0) | |
2235 | pi = find_procinfo_or_die (pi->pid, 0); | |
2236 | ||
2237 | #ifdef NEW_PROC_API | |
2238 | if (!pi->status_valid) | |
2239 | if (!proc_get_status (pi)) | |
2240 | return NULL; | |
2241 | ||
2242 | ret = &pi->prstatus.pr_flttrace; | |
2243 | #else | |
2244 | { | |
2245 | static fltset_t flttrace; | |
2246 | ||
2247 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2248 | ret = &flttrace; | |
2249 | } | |
2250 | #endif | |
2251 | if (save && ret) | |
2252 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2253 | |
c3f6f71d JM |
2254 | return ret; |
2255 | } | |
c906108c | 2256 | |
c3f6f71d JM |
2257 | /* |
2258 | * Function: proc_get_traced_sysentry | |
2259 | * | |
2260 | * returns the set of syscalls that are traced /debugged on entry. | |
2261 | * Will also copy the syscall set if 'save' is non-zero. | |
2262 | */ | |
c906108c | 2263 | |
c3f6f71d | 2264 | sysset_t * |
fba45db2 | 2265 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2266 | { |
2267 | sysset_t *ret = NULL; | |
2268 | ||
2269 | /* | |
2270 | * We should never have to apply this operation to any procinfo | |
2271 | * except the one for the main process. If that ever changes | |
2272 | * for any reason, then take out the following clause and | |
2273 | * replace it with one that makes sure the ctl_fd is open. | |
2274 | */ | |
2275 | ||
2276 | if (pi->tid != 0) | |
2277 | pi = find_procinfo_or_die (pi->pid, 0); | |
2278 | ||
2279 | #ifdef NEW_PROC_API | |
2280 | if (!pi->status_valid) | |
2281 | if (!proc_get_status (pi)) | |
2282 | return NULL; | |
2283 | ||
37de36c6 | 2284 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2285 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2286 | #else /* DYNAMIC_SYSCALLS */ |
2287 | { | |
2288 | static sysset_t *sysentry; | |
2289 | size_t size; | |
2290 | ||
2291 | if (!sysentry) | |
2292 | sysentry = sysset_t_alloc (pi); | |
2293 | ret = sysentry; | |
2294 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2295 | return NULL; | |
2296 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2297 | { | |
2298 | gdb_premptysysset (sysentry); | |
2299 | } | |
2300 | else | |
2301 | { | |
2302 | int rsize; | |
2303 | ||
2304 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2305 | SEEK_SET) | |
2306 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2307 | return NULL; | |
2308 | size = sysset_t_size (pi); | |
2309 | gdb_premptysysset (sysentry); | |
2310 | rsize = read (pi->status_fd, sysentry, size); | |
2311 | if (rsize < 0) | |
2312 | return NULL; | |
2313 | } | |
2314 | } | |
2315 | #endif /* DYNAMIC_SYSCALLS */ | |
2316 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2317 | { |
2318 | static sysset_t sysentry; | |
c906108c | 2319 | |
c3f6f71d JM |
2320 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2321 | ret = &sysentry; | |
2322 | } | |
37de36c6 | 2323 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2324 | if (save && ret) |
37de36c6 | 2325 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2326 | |
c3f6f71d JM |
2327 | return ret; |
2328 | } | |
c5aa993b | 2329 | |
c3f6f71d JM |
2330 | /* |
2331 | * Function: proc_get_traced_sysexit | |
2332 | * | |
2333 | * returns the set of syscalls that are traced /debugged on exit. | |
2334 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2335 | */ |
2336 | ||
c3f6f71d | 2337 | sysset_t * |
fba45db2 | 2338 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2339 | { |
c3f6f71d JM |
2340 | sysset_t * ret = NULL; |
2341 | ||
2342 | /* | |
2343 | * We should never have to apply this operation to any procinfo | |
2344 | * except the one for the main process. If that ever changes | |
2345 | * for any reason, then take out the following clause and | |
2346 | * replace it with one that makes sure the ctl_fd is open. | |
2347 | */ | |
2348 | ||
2349 | if (pi->tid != 0) | |
2350 | pi = find_procinfo_or_die (pi->pid, 0); | |
2351 | ||
2352 | #ifdef NEW_PROC_API | |
2353 | if (!pi->status_valid) | |
2354 | if (!proc_get_status (pi)) | |
2355 | return NULL; | |
2356 | ||
37de36c6 | 2357 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2358 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2359 | #else /* DYNAMIC_SYSCALLS */ |
2360 | { | |
2361 | static sysset_t *sysexit; | |
2362 | size_t size; | |
2363 | ||
2364 | if (!sysexit) | |
2365 | sysexit = sysset_t_alloc (pi); | |
2366 | ret = sysexit; | |
2367 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2368 | return NULL; | |
2369 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2370 | { | |
2371 | gdb_premptysysset (sysexit); | |
2372 | } | |
2373 | else | |
2374 | { | |
2375 | int rsize; | |
2376 | ||
2377 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2378 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2379 | return NULL; | |
2380 | size = sysset_t_size (pi); | |
2381 | gdb_premptysysset (sysexit); | |
2382 | rsize = read (pi->status_fd, sysexit, size); | |
2383 | if (rsize < 0) | |
2384 | return NULL; | |
2385 | } | |
2386 | } | |
2387 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2388 | #else |
2389 | { | |
2390 | static sysset_t sysexit; | |
c5aa993b | 2391 | |
c3f6f71d JM |
2392 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2393 | ret = &sysexit; | |
2394 | } | |
2395 | #endif | |
2396 | if (save && ret) | |
37de36c6 | 2397 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2398 | |
2399 | return ret; | |
2400 | } | |
c906108c | 2401 | |
c3f6f71d JM |
2402 | /* |
2403 | * Function: proc_clear_current_fault | |
2404 | * | |
2405 | * The current fault (if any) is cleared; the associated signal | |
2406 | * will not be sent to the process or LWP when it resumes. | |
2407 | * Returns non-zero for success, zero for failure. | |
2408 | */ | |
c906108c | 2409 | |
c3f6f71d | 2410 | int |
fba45db2 | 2411 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2412 | { |
2413 | int win; | |
2414 | ||
2415 | /* | |
2416 | * We should never have to apply this operation to any procinfo | |
2417 | * except the one for the main process. If that ever changes | |
2418 | * for any reason, then take out the following clause and | |
2419 | * replace it with one that makes sure the ctl_fd is open. | |
2420 | */ | |
2421 | ||
2422 | if (pi->tid != 0) | |
2423 | pi = find_procinfo_or_die (pi->pid, 0); | |
2424 | ||
2425 | #ifdef NEW_PROC_API | |
2426 | { | |
37de36c6 | 2427 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2428 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2429 | } | |
2430 | #else | |
2431 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2432 | #endif | |
2433 | ||
2434 | return win; | |
c906108c SS |
2435 | } |
2436 | ||
2437 | /* | |
c3f6f71d JM |
2438 | * Function: proc_set_current_signal |
2439 | * | |
2440 | * Set the "current signal" that will be delivered next to the process. | |
2441 | * NOTE: semantics are different from those of KILL. | |
2442 | * This signal will be delivered to the process or LWP | |
2443 | * immediately when it is resumed (even if the signal is held/blocked); | |
2444 | * it will NOT immediately cause another event of interest, and will NOT | |
2445 | * first trap back to the debugger. | |
2446 | * | |
2447 | * Returns non-zero for success, zero for failure. | |
2448 | */ | |
2449 | ||
2450 | int | |
fba45db2 | 2451 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2452 | { |
2453 | int win; | |
2454 | struct { | |
37de36c6 | 2455 | procfs_ctl_t cmd; |
c3f6f71d | 2456 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2457 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2458 | } arg; |
37de36c6 | 2459 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2460 | |
2461 | /* | |
2462 | * We should never have to apply this operation to any procinfo | |
2463 | * except the one for the main process. If that ever changes | |
2464 | * for any reason, then take out the following clause and | |
2465 | * replace it with one that makes sure the ctl_fd is open. | |
2466 | */ | |
2467 | ||
2468 | if (pi->tid != 0) | |
2469 | pi = find_procinfo_or_die (pi->pid, 0); | |
2470 | ||
2471 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2472 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2473 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2474 | * it messes up the current signal. Work around the kernel bug. | |
2475 | */ | |
2476 | if (signo > 0 && | |
2477 | signo == proc_cursig (pi)) | |
2478 | return 1; /* I assume this is a success? */ | |
2479 | #endif | |
2480 | ||
2481 | /* The pointer is just a type alias. */ | |
37de36c6 | 2482 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2483 | mysinfo->si_signo = signo; |
2484 | mysinfo->si_code = 0; | |
2485 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2486 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2487 | ||
2488 | #ifdef NEW_PROC_API | |
2489 | arg.cmd = PCSSIG; | |
2490 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2491 | #else | |
2492 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2493 | #endif | |
c906108c | 2494 | |
c3f6f71d JM |
2495 | return win; |
2496 | } | |
c906108c | 2497 | |
c3f6f71d JM |
2498 | /* |
2499 | * Function: proc_clear_current_signal | |
2500 | * | |
2501 | * The current signal (if any) is cleared, and | |
2502 | * is not sent to the process or LWP when it resumes. | |
2503 | * Returns non-zero for success, zero for failure. | |
2504 | */ | |
c906108c | 2505 | |
c3f6f71d | 2506 | int |
fba45db2 | 2507 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2508 | { |
2509 | int win; | |
2510 | ||
2511 | /* | |
2512 | * We should never have to apply this operation to any procinfo | |
2513 | * except the one for the main process. If that ever changes | |
2514 | * for any reason, then take out the following clause and | |
2515 | * replace it with one that makes sure the ctl_fd is open. | |
2516 | */ | |
2517 | ||
2518 | if (pi->tid != 0) | |
2519 | pi = find_procinfo_or_die (pi->pid, 0); | |
2520 | ||
2521 | #ifdef NEW_PROC_API | |
2522 | { | |
2523 | struct { | |
37de36c6 | 2524 | procfs_ctl_t cmd; |
c3f6f71d | 2525 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2526 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2527 | } arg; |
37de36c6 | 2528 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2529 | |
2530 | arg.cmd = PCSSIG; | |
2531 | /* The pointer is just a type alias. */ | |
37de36c6 | 2532 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2533 | mysinfo->si_signo = 0; |
2534 | mysinfo->si_code = 0; | |
2535 | mysinfo->si_errno = 0; | |
2536 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2537 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2538 | ||
2539 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2540 | } | |
2541 | #else | |
2542 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2543 | #endif | |
c906108c | 2544 | |
c3f6f71d JM |
2545 | return win; |
2546 | } | |
c906108c | 2547 | |
c3f6f71d JM |
2548 | /* |
2549 | * Function: proc_get_gregs | |
2550 | * | |
2551 | * Get the general registers for the process or LWP. | |
2552 | * Returns non-zero for success, zero for failure. | |
2553 | */ | |
c906108c | 2554 | |
c3f6f71d | 2555 | gdb_gregset_t * |
fba45db2 | 2556 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2557 | { |
2558 | if (!pi->status_valid || !pi->gregs_valid) | |
2559 | if (!proc_get_status (pi)) | |
2560 | return NULL; | |
2561 | ||
2562 | /* | |
2563 | * OK, sorry about the ifdef's. | |
2564 | * There's three cases instead of two, because | |
2565 | * in this instance Unixware and Solaris/RW differ. | |
2566 | */ | |
2567 | ||
2568 | #ifdef NEW_PROC_API | |
2569 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2570 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2571 | #else /* not Unixware */ | |
2572 | return &pi->prstatus.pr_lwp.pr_reg; | |
2573 | #endif /* Unixware */ | |
2574 | #else /* not NEW_PROC_API */ | |
2575 | return &pi->prstatus.pr_reg; | |
2576 | #endif /* NEW_PROC_API */ | |
2577 | } | |
c5aa993b | 2578 | |
c3f6f71d JM |
2579 | /* |
2580 | * Function: proc_get_fpregs | |
2581 | * | |
2582 | * Get the floating point registers for the process or LWP. | |
2583 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2584 | */ |
2585 | ||
c3f6f71d | 2586 | gdb_fpregset_t * |
fba45db2 | 2587 | proc_get_fpregs (procinfo *pi) |
c906108c | 2588 | { |
c3f6f71d JM |
2589 | #ifdef NEW_PROC_API |
2590 | if (!pi->status_valid || !pi->fpregs_valid) | |
2591 | if (!proc_get_status (pi)) | |
2592 | return NULL; | |
2593 | ||
2594 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2595 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2596 | #else | |
2597 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2598 | #endif /* Unixware */ | |
c5aa993b | 2599 | |
c3f6f71d JM |
2600 | #else /* not NEW_PROC_API */ |
2601 | if (pi->fpregs_valid) | |
2602 | return &pi->fpregset; /* already got 'em */ | |
2603 | else | |
c906108c | 2604 | { |
c3f6f71d JM |
2605 | if (pi->ctl_fd == 0 && |
2606 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2607 | { |
c3f6f71d | 2608 | return NULL; |
c906108c | 2609 | } |
c3f6f71d | 2610 | else |
c906108c | 2611 | { |
c3f6f71d JM |
2612 | #ifdef PIOCTGFPREG |
2613 | struct { | |
2614 | long pr_count; | |
2615 | tid_t pr_error_thread; | |
2616 | tfpregset_t thread_1; | |
2617 | } thread_fpregs; | |
2618 | ||
2619 | thread_fpregs.pr_count = 1; | |
2620 | thread_fpregs.thread_1.tid = pi->tid; | |
2621 | ||
2622 | if (pi->tid == 0 && | |
2623 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2624 | { | |
2625 | pi->fpregs_valid = 1; | |
2626 | return &pi->fpregset; /* got 'em now! */ | |
2627 | } | |
2628 | else if (pi->tid != 0 && | |
2629 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2630 | { | |
2631 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2632 | sizeof (pi->fpregset)); | |
2633 | pi->fpregs_valid = 1; | |
2634 | return &pi->fpregset; /* got 'em now! */ | |
2635 | } | |
2636 | else | |
2637 | { | |
2638 | return NULL; | |
2639 | } | |
2640 | #else | |
2641 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2642 | { | |
2643 | pi->fpregs_valid = 1; | |
2644 | return &pi->fpregset; /* got 'em now! */ | |
2645 | } | |
2646 | else | |
2647 | { | |
2648 | return NULL; | |
2649 | } | |
2650 | #endif | |
c906108c | 2651 | } |
c906108c | 2652 | } |
c3f6f71d | 2653 | #endif |
c906108c SS |
2654 | } |
2655 | ||
c3f6f71d JM |
2656 | /* |
2657 | * Function: proc_set_gregs | |
2658 | * | |
2659 | * Write the general registers back to the process or LWP. | |
2660 | * Returns non-zero for success, zero for failure. | |
2661 | */ | |
2662 | ||
2663 | int | |
fba45db2 | 2664 | proc_set_gregs (procinfo *pi) |
c906108c | 2665 | { |
c3f6f71d JM |
2666 | gdb_gregset_t *gregs; |
2667 | int win; | |
c5aa993b | 2668 | |
c3f6f71d JM |
2669 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2670 | return 0; /* get_regs has already warned */ | |
2671 | ||
2672 | if (pi->ctl_fd == 0 && | |
2673 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2674 | { |
c3f6f71d | 2675 | return 0; |
c906108c | 2676 | } |
c3f6f71d | 2677 | else |
c906108c | 2678 | { |
c3f6f71d JM |
2679 | #ifdef NEW_PROC_API |
2680 | struct { | |
37de36c6 | 2681 | procfs_ctl_t cmd; |
c3f6f71d JM |
2682 | /* Use char array to avoid alignment issues. */ |
2683 | char gregs[sizeof (gdb_gregset_t)]; | |
2684 | } arg; | |
2685 | ||
2686 | arg.cmd = PCSREG; | |
2687 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2688 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2689 | #else | |
2690 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2691 | #endif | |
c906108c | 2692 | } |
c3f6f71d JM |
2693 | |
2694 | /* Policy: writing the regs invalidates our cache. */ | |
2695 | pi->gregs_valid = 0; | |
2696 | return win; | |
c906108c SS |
2697 | } |
2698 | ||
c3f6f71d JM |
2699 | /* |
2700 | * Function: proc_set_fpregs | |
2701 | * | |
2702 | * Modify the floating point register set of the process or LWP. | |
2703 | * Returns non-zero for success, zero for failure. | |
2704 | */ | |
2705 | ||
2706 | int | |
fba45db2 | 2707 | proc_set_fpregs (procinfo *pi) |
c906108c | 2708 | { |
c3f6f71d JM |
2709 | gdb_fpregset_t *fpregs; |
2710 | int win; | |
2711 | ||
2712 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2713 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2714 | |
c3f6f71d JM |
2715 | if (pi->ctl_fd == 0 && |
2716 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2717 | { |
c3f6f71d | 2718 | return 0; |
c906108c | 2719 | } |
c3f6f71d | 2720 | else |
c906108c | 2721 | { |
c3f6f71d JM |
2722 | #ifdef NEW_PROC_API |
2723 | struct { | |
37de36c6 | 2724 | procfs_ctl_t cmd; |
c3f6f71d JM |
2725 | /* Use char array to avoid alignment issues. */ |
2726 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2727 | } arg; | |
2728 | ||
2729 | arg.cmd = PCSFPREG; | |
2730 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2731 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2732 | #else | |
2733 | #ifdef PIOCTSFPREG | |
2734 | if (pi->tid == 0) | |
2735 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2736 | else | |
2737 | { | |
2738 | struct { | |
2739 | long pr_count; | |
2740 | tid_t pr_error_thread; | |
2741 | tfpregset_t thread_1; | |
2742 | } thread_fpregs; | |
2743 | ||
2744 | thread_fpregs.pr_count = 1; | |
2745 | thread_fpregs.thread_1.tid = pi->tid; | |
2746 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2747 | sizeof (*fpregs)); | |
2748 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2749 | } | |
2750 | #else | |
2751 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2752 | #endif /* osf PIOCTSFPREG */ | |
2753 | #endif /* NEW_PROC_API */ | |
c906108c | 2754 | } |
c3f6f71d JM |
2755 | |
2756 | /* Policy: writing the regs invalidates our cache. */ | |
2757 | pi->fpregs_valid = 0; | |
2758 | return win; | |
c906108c SS |
2759 | } |
2760 | ||
2761 | /* | |
c3f6f71d JM |
2762 | * Function: proc_kill |
2763 | * | |
2764 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2765 | * Returns non-zero for success, zero for failure. | |
2766 | */ | |
c906108c | 2767 | |
c3f6f71d | 2768 | int |
fba45db2 | 2769 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2770 | { |
2771 | int win; | |
c906108c | 2772 | |
c3f6f71d JM |
2773 | /* |
2774 | * We might conceivably apply this operation to an LWP, and | |
2775 | * the LWP's ctl file descriptor might not be open. | |
2776 | */ | |
c906108c | 2777 | |
c3f6f71d JM |
2778 | if (pi->ctl_fd == 0 && |
2779 | open_procinfo_files (pi, FD_CTL) == 0) | |
2780 | { | |
2781 | return 0; | |
2782 | } | |
2783 | else | |
2784 | { | |
2785 | #ifdef NEW_PROC_API | |
37de36c6 | 2786 | procfs_ctl_t cmd[2]; |
c906108c | 2787 | |
c3f6f71d JM |
2788 | cmd[0] = PCKILL; |
2789 | cmd[1] = signo; | |
2790 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2791 | #else /* ioctl method */ | |
2792 | /* FIXME: do I need the Alpha OSF fixups present in | |
2793 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2794 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2795 | #endif | |
2796 | } | |
c906108c | 2797 | |
c3f6f71d JM |
2798 | return win; |
2799 | } | |
c906108c | 2800 | |
c3f6f71d JM |
2801 | /* |
2802 | * Function: proc_parent_pid | |
2803 | * | |
2804 | * Find the pid of the process that started this one. | |
2805 | * Returns the parent process pid, or zero. | |
c906108c SS |
2806 | */ |
2807 | ||
c3f6f71d | 2808 | int |
fba45db2 | 2809 | proc_parent_pid (procinfo *pi) |
c906108c | 2810 | { |
c3f6f71d JM |
2811 | /* |
2812 | * We should never have to apply this operation to any procinfo | |
2813 | * except the one for the main process. If that ever changes | |
2814 | * for any reason, then take out the following clause and | |
2815 | * replace it with one that makes sure the ctl_fd is open. | |
2816 | */ | |
2817 | ||
2818 | if (pi->tid != 0) | |
2819 | pi = find_procinfo_or_die (pi->pid, 0); | |
2820 | ||
2821 | if (!pi->status_valid) | |
2822 | if (!proc_get_status (pi)) | |
2823 | return 0; | |
c5aa993b | 2824 | |
c3f6f71d JM |
2825 | return pi->prstatus.pr_ppid; |
2826 | } | |
2827 | ||
2828 | ||
2829 | /* | |
2830 | * Function: proc_set_watchpoint | |
2831 | * | |
2832 | */ | |
2833 | ||
2834 | int | |
fba45db2 | 2835 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d JM |
2836 | { |
2837 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2838 | return 0; | |
2839 | #else | |
2840 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2841 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2842 | return 0; | |
2843 | #else | |
2844 | struct { | |
37de36c6 | 2845 | procfs_ctl_t cmd; |
c3f6f71d JM |
2846 | char watch[sizeof (prwatch_t)]; |
2847 | } arg; | |
2848 | prwatch_t *pwatch; | |
2849 | ||
2850 | pwatch = (prwatch_t *) &arg.watch; | |
ac2e2ef7 | 2851 | pwatch->pr_vaddr = address_to_host_pointer (addr); |
c3f6f71d JM |
2852 | pwatch->pr_size = len; |
2853 | pwatch->pr_wflags = wflags; | |
2854 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2855 | arg.cmd = PCWATCH; | |
2856 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2857 | #else | |
2858 | #if defined (PIOCSWATCH) | |
2859 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2860 | #else | |
2861 | return 0; /* Fail */ | |
2862 | #endif | |
2863 | #endif | |
2864 | #endif | |
2865 | #endif | |
c906108c SS |
2866 | } |
2867 | ||
2868 | /* | |
c3f6f71d JM |
2869 | * Function: proc_iterate_over_mappings |
2870 | * | |
2871 | * Given a pointer to a function, call that function once for every | |
2872 | * mapped address space in the process. The callback function | |
2873 | * receives an open file descriptor for the file corresponding to | |
2874 | * that mapped address space (if there is one), and the base address | |
2875 | * of the mapped space. Quit when the callback function returns a | |
2876 | * nonzero value, or at teh end of the mappings. | |
2877 | * | |
2878 | * Returns: the first non-zero return value of the callback function, | |
2879 | * or zero. | |
2880 | */ | |
c906108c | 2881 | |
c3f6f71d | 2882 | int |
d0849a9a | 2883 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) |
c3f6f71d JM |
2884 | { |
2885 | struct prmap *map; | |
2886 | procinfo *pi; | |
0d06e24b | 2887 | #ifndef NEW_PROC_API /* avoid compiler warning */ |
0fda6bd2 JM |
2888 | int nmaps = 0; |
2889 | int i; | |
2890 | #else | |
2891 | int map_fd; | |
2892 | char pathname[MAX_PROC_NAME_SIZE]; | |
0d06e24b | 2893 | #endif |
c3f6f71d | 2894 | int funcstat = 0; |
0fda6bd2 | 2895 | int fd; |
c906108c | 2896 | |
39f77062 | 2897 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c906108c | 2898 | |
c3f6f71d JM |
2899 | #ifdef NEW_PROC_API |
2900 | /* Open map fd. */ | |
2901 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
4d1bcd09 | 2902 | if ((map_fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c3f6f71d | 2903 | proc_error (pi, "proc_iterate_over_mappings (open)", __LINE__); |
c906108c | 2904 | |
c3f6f71d | 2905 | /* Make sure it gets closed again. */ |
004527cb | 2906 | make_cleanup_close (map_fd); |
c906108c | 2907 | |
c3f6f71d JM |
2908 | /* Allocate space for mapping (lifetime only for this function). */ |
2909 | map = alloca (sizeof (struct prmap)); | |
c906108c | 2910 | |
c3f6f71d JM |
2911 | /* Now read the mappings from the file, |
2912 | open a file descriptor for those that have a name, | |
2913 | and call the callback function. */ | |
2914 | while (read (map_fd, | |
2915 | (void *) map, | |
2916 | sizeof (struct prmap)) == sizeof (struct prmap)) | |
2917 | { | |
2918 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
c906108c | 2919 | |
c3f6f71d JM |
2920 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
2921 | break; /* sanity */ | |
c906108c | 2922 | |
c3f6f71d JM |
2923 | if (map->pr_mapname[0] == 0) |
2924 | { | |
2925 | fd = -1; /* no map file */ | |
2926 | } | |
2927 | else | |
2928 | { | |
2929 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
2930 | /* Note: caller's responsibility to close this fd! */ | |
4d1bcd09 | 2931 | fd = open_with_retry (name, O_RDONLY); |
c3f6f71d JM |
2932 | /* Note: we don't test the above call for failure; |
2933 | we just pass the FD on as given. Sometimes there is | |
2934 | no file, so the ioctl may return failure, but that's | |
2935 | not a problem. */ | |
2936 | } | |
c906108c | 2937 | |
c3f6f71d JM |
2938 | /* Stop looping if the callback returns non-zero. */ |
2939 | if ((funcstat = (*func) (fd, (CORE_ADDR) map->pr_vaddr)) != 0) | |
2940 | break; | |
2941 | } | |
2942 | #else | |
2943 | /* Get the number of mapping entries. */ | |
2944 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmaps) < 0) | |
2945 | proc_error (pi, "proc_iterate_over_mappings (PIOCNMAP)", __LINE__); | |
2946 | ||
2947 | /* Allocate space for mappings (lifetime only this function). */ | |
2948 | map = (struct prmap *) alloca ((nmaps + 1) * sizeof (struct prmap)); | |
2949 | ||
2950 | /* Read in all the mappings. */ | |
2951 | if (ioctl (pi->ctl_fd, PIOCMAP, map) < 0) | |
2952 | proc_error (pi, "proc_iterate_over_mappings (PIOCMAP)", __LINE__); | |
2953 | ||
2954 | /* Now loop through the mappings, open an fd for each, and | |
2955 | call the callback function. */ | |
2956 | for (i = 0; | |
2957 | i < nmaps && map[i].pr_size != 0; | |
2958 | i++) | |
2959 | { | |
2960 | /* Note: caller's responsibility to close this fd! */ | |
2961 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map[i].pr_vaddr); | |
2962 | /* Note: we don't test the above call for failure; | |
2963 | we just pass the FD on as given. Sometimes there is | |
2964 | no file, so the ioctl may return failure, but that's | |
2965 | not a problem. */ | |
2966 | ||
2967 | /* Stop looping if the callback returns non-zero. */ | |
ac2e2ef7 AC |
2968 | funcstat = (*func) (fd, host_pointer_to_address (map[i].pr_vaddr)); |
2969 | if (funcstat != 0) | |
c3f6f71d JM |
2970 | break; |
2971 | } | |
c906108c | 2972 | #endif |
c906108c | 2973 | |
c3f6f71d JM |
2974 | return funcstat; |
2975 | } | |
c906108c | 2976 | |
c3f6f71d | 2977 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2978 | |
c3f6f71d | 2979 | #include <sys/sysi86.h> |
c906108c | 2980 | |
c3f6f71d JM |
2981 | /* |
2982 | * Function: proc_get_LDT_entry | |
2983 | * | |
2984 | * Inputs: | |
2985 | * procinfo *pi; | |
2986 | * int key; | |
2987 | * | |
2988 | * The 'key' is actually the value of the lower 16 bits of | |
2989 | * the GS register for the LWP that we're interested in. | |
2990 | * | |
2991 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2992 | */ |
2993 | ||
c3f6f71d | 2994 | struct ssd * |
fba45db2 | 2995 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2996 | { |
c3f6f71d JM |
2997 | static struct ssd *ldt_entry = NULL; |
2998 | #ifdef NEW_PROC_API | |
2999 | char pathname[MAX_PROC_NAME_SIZE]; | |
3000 | struct cleanup *old_chain = NULL; | |
3001 | int fd; | |
3002 | ||
3003 | /* Allocate space for one LDT entry. | |
3004 | This alloc must persist, because we return a pointer to it. */ | |
3005 | if (ldt_entry == NULL) | |
3006 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
3007 | ||
3008 | /* Open the file descriptor for the LDT table. */ | |
3009 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 3010 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 3011 | { |
c3f6f71d JM |
3012 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
3013 | return NULL; | |
c906108c | 3014 | } |
c3f6f71d | 3015 | /* Make sure it gets closed again! */ |
004527cb | 3016 | old_chain = make_cleanup_close (fd); |
c906108c | 3017 | |
c3f6f71d JM |
3018 | /* Now 'read' thru the table, find a match and return it. */ |
3019 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 3020 | { |
c3f6f71d JM |
3021 | if (ldt_entry->sel == 0 && |
3022 | ldt_entry->bo == 0 && | |
3023 | ldt_entry->acc1 == 0 && | |
3024 | ldt_entry->acc2 == 0) | |
3025 | break; /* end of table */ | |
3026 | /* If key matches, return this entry. */ | |
3027 | if (ldt_entry->sel == key) | |
3028 | return ldt_entry; | |
c906108c | 3029 | } |
c3f6f71d JM |
3030 | /* Loop ended, match not found. */ |
3031 | return NULL; | |
3032 | #else | |
3033 | int nldt, i; | |
3034 | static int nalloc = 0; | |
c906108c | 3035 | |
c3f6f71d JM |
3036 | /* Get the number of LDT entries. */ |
3037 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 3038 | { |
c3f6f71d JM |
3039 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
3040 | return NULL; | |
c906108c SS |
3041 | } |
3042 | ||
c3f6f71d JM |
3043 | /* Allocate space for the number of LDT entries. */ |
3044 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
3045 | if (nldt > nalloc) | |
c906108c | 3046 | { |
c3f6f71d JM |
3047 | ldt_entry = (struct ssd *) |
3048 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
3049 | nalloc = nldt; | |
3050 | } | |
3051 | ||
3052 | /* Read the whole table in one gulp. */ | |
3053 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
3054 | { | |
3055 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
3056 | return NULL; | |
c906108c SS |
3057 | } |
3058 | ||
c3f6f71d JM |
3059 | /* Search the table and return the (first) entry matching 'key'. */ |
3060 | for (i = 0; i < nldt; i++) | |
3061 | if (ldt_entry[i].sel == key) | |
3062 | return &ldt_entry[i]; | |
c906108c | 3063 | |
c3f6f71d JM |
3064 | /* Loop ended, match not found. */ |
3065 | return NULL; | |
3066 | #endif | |
3067 | } | |
c906108c | 3068 | |
c3f6f71d | 3069 | #endif /* TM_I386SOL2_H */ |
c906108c | 3070 | |
c3f6f71d | 3071 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 3072 | |
c3f6f71d | 3073 | /* =================== Thread "MODULE" =================== */ |
c906108c | 3074 | |
c3f6f71d JM |
3075 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
3076 | since there is a different way to do threads on every OS. */ | |
c906108c | 3077 | |
c3f6f71d JM |
3078 | /* |
3079 | * Function: proc_get_nthreads | |
3080 | * | |
3081 | * Return the number of threads for the process | |
3082 | */ | |
c906108c | 3083 | |
c3f6f71d JM |
3084 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
3085 | /* | |
3086 | * OSF version | |
3087 | */ | |
3088 | int | |
fba45db2 | 3089 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
3090 | { |
3091 | int nthreads = 0; | |
c906108c | 3092 | |
c3f6f71d JM |
3093 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3094 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3095 | |
c3f6f71d | 3096 | return nthreads; |
c906108c SS |
3097 | } |
3098 | ||
c3f6f71d JM |
3099 | #else |
3100 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3101 | /* | |
3102 | * Solaris and Unixware version | |
3103 | */ | |
3104 | int | |
fba45db2 | 3105 | proc_get_nthreads (procinfo *pi) |
c906108c | 3106 | { |
c3f6f71d JM |
3107 | if (!pi->status_valid) |
3108 | if (!proc_get_status (pi)) | |
3109 | return 0; | |
c5aa993b | 3110 | |
c3f6f71d JM |
3111 | /* |
3112 | * NEW_PROC_API: only works for the process procinfo, | |
3113 | * because the LWP procinfos do not get prstatus filled in. | |
3114 | */ | |
3115 | #ifdef NEW_PROC_API | |
3116 | if (pi->tid != 0) /* find the parent process procinfo */ | |
3117 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3118 | #endif |
c3f6f71d | 3119 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3120 | } |
3121 | ||
c3f6f71d JM |
3122 | #else |
3123 | /* | |
3124 | * Default version | |
3125 | */ | |
3126 | int | |
fba45db2 | 3127 | proc_get_nthreads (procinfo *pi) |
c906108c | 3128 | { |
c3f6f71d JM |
3129 | return 0; |
3130 | } | |
3131 | #endif | |
3132 | #endif | |
3133 | ||
3134 | /* | |
3135 | * Function: proc_get_current_thread (LWP version) | |
3136 | * | |
3137 | * Return the ID of the thread that had an event of interest. | |
3138 | * (ie. the one that hit a breakpoint or other traced event). | |
3139 | * All other things being equal, this should be the ID of a | |
3140 | * thread that is currently executing. | |
3141 | */ | |
3142 | ||
3143 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3144 | /* | |
3145 | * Solaris and Unixware version | |
3146 | */ | |
3147 | int | |
fba45db2 | 3148 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3149 | { |
3150 | /* | |
3151 | * Note: this should be applied to the root procinfo for the process, | |
3152 | * not to the procinfo for an LWP. If applied to the procinfo for | |
3153 | * an LWP, it will simply return that LWP's ID. In that case, | |
3154 | * find the parent process procinfo. | |
3155 | */ | |
3156 | ||
3157 | if (pi->tid != 0) | |
3158 | pi = find_procinfo_or_die (pi->pid, 0); | |
3159 | ||
3160 | if (!pi->status_valid) | |
3161 | if (!proc_get_status (pi)) | |
3162 | return 0; | |
3163 | ||
3164 | #ifdef NEW_PROC_API | |
3165 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3166 | #else |
c3f6f71d | 3167 | return pi->prstatus.pr_who; |
c906108c | 3168 | #endif |
c3f6f71d | 3169 | } |
c906108c | 3170 | |
c3f6f71d JM |
3171 | #else |
3172 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3173 | /* | |
3174 | * OSF version | |
3175 | */ | |
3176 | int | |
fba45db2 | 3177 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3178 | { |
3179 | #if 0 /* FIXME: not ready for prime time? */ | |
3180 | return pi->prstatus.pr_tid; | |
3181 | #else | |
3182 | return 0; | |
3183 | #endif | |
c906108c SS |
3184 | } |
3185 | ||
c3f6f71d JM |
3186 | #else |
3187 | /* | |
3188 | * Default version | |
3189 | */ | |
3190 | int | |
fba45db2 | 3191 | proc_get_current_thread (procinfo *pi) |
c906108c | 3192 | { |
c3f6f71d JM |
3193 | return 0; |
3194 | } | |
3195 | ||
3196 | #endif | |
3197 | #endif | |
c906108c | 3198 | |
c3f6f71d JM |
3199 | /* |
3200 | * Function: proc_update_threads | |
3201 | * | |
3202 | * Discover the IDs of all the threads within the process, and | |
3203 | * create a procinfo for each of them (chained to the parent). | |
3204 | * | |
3205 | * This unfortunately requires a different method on every OS. | |
3206 | * | |
3207 | * Return: non-zero for success, zero for failure. | |
3208 | */ | |
c906108c | 3209 | |
c3f6f71d | 3210 | int |
fba45db2 | 3211 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3212 | { |
3213 | if (thread && parent) /* sanity */ | |
c906108c | 3214 | { |
c3f6f71d JM |
3215 | thread->status_valid = 0; |
3216 | if (!proc_get_status (thread)) | |
3217 | destroy_one_procinfo (&parent->thread_list, thread); | |
3218 | } | |
3219 | return 0; /* keep iterating */ | |
3220 | } | |
c5aa993b | 3221 | |
c3f6f71d JM |
3222 | #if defined (PIOCLSTATUS) |
3223 | /* | |
3224 | * Solaris 2.5 (ioctl) version | |
3225 | */ | |
3226 | int | |
fba45db2 | 3227 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3228 | { |
3229 | gdb_prstatus_t *prstatus; | |
3230 | struct cleanup *old_chain = NULL; | |
3231 | procinfo *thread; | |
3232 | int nlwp, i; | |
3233 | ||
3234 | /* | |
3235 | * We should never have to apply this operation to any procinfo | |
3236 | * except the one for the main process. If that ever changes | |
3237 | * for any reason, then take out the following clause and | |
3238 | * replace it with one that makes sure the ctl_fd is open. | |
3239 | */ | |
3240 | ||
3241 | if (pi->tid != 0) | |
3242 | pi = find_procinfo_or_die (pi->pid, 0); | |
3243 | ||
3244 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3245 | ||
3246 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3247 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3248 | ||
3c37485b | 3249 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3250 | |
b8c9b27d | 3251 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3252 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3253 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3254 | ||
3255 | /* Skip element zero, which represents the process as a whole. */ | |
3256 | for (i = 1; i < nlwp + 1; i++) | |
3257 | { | |
3258 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3259 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3260 | |
c3f6f71d JM |
3261 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3262 | thread->status_valid = 1; | |
3263 | } | |
3264 | pi->threads_valid = 1; | |
3265 | do_cleanups (old_chain); | |
3266 | return 1; | |
3267 | } | |
3268 | #else | |
3269 | #ifdef NEW_PROC_API | |
3270 | /* | |
3271 | * Unixware and Solaris 6 (and later) version | |
3272 | */ | |
004527cb AC |
3273 | static void |
3274 | do_closedir_cleanup (void *dir) | |
3275 | { | |
3276 | closedir (dir); | |
3277 | } | |
3278 | ||
c3f6f71d | 3279 | int |
fba45db2 | 3280 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3281 | { |
3282 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3283 | struct dirent *direntry; | |
3284 | struct cleanup *old_chain = NULL; | |
3285 | procinfo *thread; | |
3286 | DIR *dirp; | |
3287 | int lwpid; | |
3288 | ||
3289 | /* | |
3290 | * We should never have to apply this operation to any procinfo | |
3291 | * except the one for the main process. If that ever changes | |
3292 | * for any reason, then take out the following clause and | |
3293 | * replace it with one that makes sure the ctl_fd is open. | |
3294 | */ | |
3295 | ||
3296 | if (pi->tid != 0) | |
3297 | pi = find_procinfo_or_die (pi->pid, 0); | |
3298 | ||
3299 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3300 | ||
3301 | /* | |
3302 | * Unixware | |
3303 | * | |
3304 | * Note: this brute-force method is the only way I know of | |
3305 | * to accomplish this task on Unixware. This method will | |
3306 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3307 | * and more elegant way to do this on Solaris, but the margins | |
3308 | * of this manuscript are too small to write it here... ;-) | |
3309 | */ | |
3310 | ||
3311 | strcpy (pathname, pi->pathname); | |
3312 | strcat (pathname, "/lwp"); | |
3313 | if ((dirp = opendir (pathname)) == NULL) | |
3314 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3315 | ||
004527cb | 3316 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3317 | while ((direntry = readdir (dirp)) != NULL) |
3318 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3319 | { | |
3320 | lwpid = atoi (&direntry->d_name[0]); | |
3321 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3322 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3323 | } | |
3324 | pi->threads_valid = 1; | |
3325 | do_cleanups (old_chain); | |
3326 | return 1; | |
3327 | } | |
3328 | #else | |
3329 | #ifdef PIOCTLIST | |
3330 | /* | |
3331 | * OSF version | |
3332 | */ | |
3333 | int | |
fba45db2 | 3334 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3335 | { |
3336 | int nthreads, i; | |
3337 | tid_t *threads; | |
3338 | ||
3339 | /* | |
3340 | * We should never have to apply this operation to any procinfo | |
3341 | * except the one for the main process. If that ever changes | |
3342 | * for any reason, then take out the following clause and | |
3343 | * replace it with one that makes sure the ctl_fd is open. | |
3344 | */ | |
3345 | ||
3346 | if (pi->tid != 0) | |
3347 | pi = find_procinfo_or_die (pi->pid, 0); | |
3348 | ||
3349 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3350 | ||
3351 | nthreads = proc_get_nthreads (pi); | |
3352 | if (nthreads < 2) | |
3353 | return 0; /* nothing to do for 1 or fewer threads */ | |
3354 | ||
3c37485b | 3355 | threads = xmalloc (nthreads * sizeof (tid_t)); |
c3f6f71d JM |
3356 | |
3357 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3358 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3359 | ||
3360 | for (i = 0; i < nthreads; i++) | |
3361 | { | |
3362 | if (!find_procinfo (pi->pid, threads[i])) | |
3363 | if (!create_procinfo (pi->pid, threads[i])) | |
3364 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3365 | } |
c3f6f71d JM |
3366 | pi->threads_valid = 1; |
3367 | return 1; | |
c906108c | 3368 | } |
c3f6f71d JM |
3369 | #else |
3370 | /* | |
3371 | * Default version | |
3372 | */ | |
3373 | int | |
fba45db2 | 3374 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3375 | { |
3376 | return 0; | |
3377 | } | |
3378 | #endif /* OSF PIOCTLIST */ | |
3379 | #endif /* NEW_PROC_API */ | |
3380 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3381 | |
c3f6f71d JM |
3382 | /* |
3383 | * Function: proc_iterate_over_threads | |
3384 | * | |
3385 | * Description: | |
3386 | * Given a pointer to a function, call that function once | |
3387 | * for each lwp in the procinfo list, until the function | |
3388 | * returns non-zero, in which event return the value | |
3389 | * returned by the function. | |
3390 | * | |
3391 | * Note: this function does NOT call update_threads. | |
3392 | * If you want to discover new threads first, you must | |
3393 | * call that function explicitly. This function just makes | |
3394 | * a quick pass over the currently-known procinfos. | |
3395 | * | |
3396 | * Arguments: | |
3397 | * pi - parent process procinfo | |
3398 | * func - per-thread function | |
3399 | * ptr - opaque parameter for function. | |
3400 | * | |
3401 | * Return: | |
3402 | * First non-zero return value from the callee, or zero. | |
3403 | */ | |
3404 | ||
3405 | int | |
d0849a9a KB |
3406 | proc_iterate_over_threads (procinfo *pi, |
3407 | int (*func) (procinfo *, procinfo *, void *), | |
3408 | void *ptr) | |
c906108c | 3409 | { |
c3f6f71d JM |
3410 | procinfo *thread, *next; |
3411 | int retval = 0; | |
c906108c | 3412 | |
c3f6f71d JM |
3413 | /* |
3414 | * We should never have to apply this operation to any procinfo | |
3415 | * except the one for the main process. If that ever changes | |
3416 | * for any reason, then take out the following clause and | |
3417 | * replace it with one that makes sure the ctl_fd is open. | |
3418 | */ | |
3419 | ||
3420 | if (pi->tid != 0) | |
3421 | pi = find_procinfo_or_die (pi->pid, 0); | |
3422 | ||
3423 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3424 | { |
c3f6f71d JM |
3425 | next = thread->next; /* in case thread is destroyed */ |
3426 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3427 | break; | |
c906108c | 3428 | } |
c3f6f71d JM |
3429 | |
3430 | return retval; | |
c906108c SS |
3431 | } |
3432 | ||
c3f6f71d JM |
3433 | /* =================== END, Thread "MODULE" =================== */ |
3434 | ||
3435 | /* =================== END, /proc "MODULE" =================== */ | |
3436 | ||
3437 | /* =================== GDB "MODULE" =================== */ | |
3438 | ||
3439 | /* | |
3440 | * Here are all of the gdb target vector functions and their friends. | |
3441 | */ | |
3442 | ||
39f77062 | 3443 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3444 | static void do_detach (int signo); |
37de36c6 | 3445 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
c3f6f71d JM |
3446 | |
3447 | /* | |
3448 | * Function: procfs_debug_inferior | |
3449 | * | |
3450 | * Sets up the inferior to be debugged. | |
3451 | * Registers to trace signals, hardware faults, and syscalls. | |
3452 | * Note: does not set RLC flag: caller may want to customize that. | |
3453 | * | |
3454 | * Returns: zero for success (note! unlike most functions in this module) | |
3455 | * On failure, returns the LINE NUMBER where it failed! | |
3456 | */ | |
3457 | ||
3458 | static int | |
fba45db2 | 3459 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3460 | { |
c3f6f71d | 3461 | fltset_t traced_faults; |
37de36c6 KB |
3462 | gdb_sigset_t traced_signals; |
3463 | sysset_t *traced_syscall_entries; | |
3464 | sysset_t *traced_syscall_exits; | |
3465 | int status; | |
c906108c | 3466 | |
c3f6f71d JM |
3467 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3468 | /* On some systems (OSF), we don't trace hardware faults. | |
3469 | Apparently it's enough that we catch them as signals. | |
3470 | Wonder why we don't just do that in general? */ | |
3471 | premptyset (&traced_faults); /* don't trace faults. */ | |
3472 | #else | |
3473 | /* Register to trace hardware faults in the child. */ | |
3474 | prfillset (&traced_faults); /* trace all faults... */ | |
3475 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3476 | #endif | |
3477 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3478 | return __LINE__; | |
c906108c | 3479 | |
c3f6f71d JM |
3480 | /* Register to trace selected signals in the child. */ |
3481 | premptyset (&traced_signals); | |
3482 | if (!register_gdb_signals (pi, &traced_signals)) | |
3483 | return __LINE__; | |
3484 | ||
37de36c6 | 3485 | |
c3f6f71d | 3486 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3487 | traced_syscall_entries = sysset_t_alloc (pi); |
3488 | gdb_premptysysset (traced_syscall_entries); | |
3489 | #ifdef SYS_exit | |
3490 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3491 | #endif | |
c3f6f71d | 3492 | #ifdef SYS_lwpexit |
37de36c6 | 3493 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3494 | #endif |
3495 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3496 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3497 | #endif | |
3498 | #ifdef DYNAMIC_SYSCALLS | |
3499 | { | |
3500 | int callnum = find_syscall (pi, "_exit"); | |
3501 | if (callnum >= 0) | |
3502 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3503 | } | |
c906108c SS |
3504 | #endif |
3505 | ||
37de36c6 KB |
3506 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3507 | xfree (traced_syscall_entries); | |
3508 | if (!status) | |
c3f6f71d JM |
3509 | return __LINE__; |
3510 | ||
3511 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3512 | /* OSF method for tracing exec syscalls. Quoting: | |
3513 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3514 | exits from exec system calls because of the user level loader. */ | |
3515 | /* FIXME: make nice and maybe move into an access function. */ | |
3516 | { | |
3517 | int prfs_flags; | |
3518 | ||
3519 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3520 | return __LINE__; | |
3521 | ||
3522 | prfs_flags |= PRFS_STOPEXEC; | |
3523 | ||
3524 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3525 | return __LINE__; | |
3526 | } | |
3527 | #else /* not PRFS_STOPEXEC */ | |
3528 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3529 | /* GW: Rationale... | |
3530 | Not all systems with /proc have all the exec* syscalls with the same | |
3531 | names. On the SGI, for example, there is no SYS_exec, but there | |
3532 | *is* a SYS_execv. So, we try to account for that. */ | |
3533 | ||
37de36c6 KB |
3534 | traced_syscall_exits = sysset_t_alloc (pi); |
3535 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3536 | #ifdef SYS_exec |
37de36c6 | 3537 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3538 | #endif |
3539 | #ifdef SYS_execve | |
37de36c6 | 3540 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3541 | #endif |
3542 | #ifdef SYS_execv | |
37de36c6 | 3543 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3544 | #endif |
c5aa993b | 3545 | |
c3f6f71d | 3546 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3547 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3548 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3549 | #endif |
c5aa993b | 3550 | |
c3f6f71d | 3551 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3552 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3553 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3554 | #endif |
c5aa993b | 3555 | |
37de36c6 KB |
3556 | #ifdef DYNAMIC_SYSCALLS |
3557 | { | |
3558 | int callnum = find_syscall (pi, "execve"); | |
3559 | if (callnum >= 0) | |
3560 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3561 | callnum = find_syscall (pi, "ra_execve"); | |
3562 | if (callnum >= 0) | |
3563 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3564 | } | |
3565 | #endif | |
c906108c | 3566 | |
37de36c6 KB |
3567 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3568 | xfree (traced_syscall_exits); | |
3569 | if (!status) | |
c3f6f71d JM |
3570 | return __LINE__; |
3571 | ||
3572 | #endif /* PRFS_STOPEXEC */ | |
3573 | return 0; | |
c906108c SS |
3574 | } |
3575 | ||
c3f6f71d | 3576 | static void |
fba45db2 | 3577 | procfs_attach (char *args, int from_tty) |
c906108c | 3578 | { |
c3f6f71d JM |
3579 | char *exec_file; |
3580 | int pid; | |
3581 | ||
3582 | if (!args) | |
3583 | error_no_arg ("process-id to attach"); | |
3584 | ||
3585 | pid = atoi (args); | |
3586 | if (pid == getpid ()) | |
3587 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3588 | |
c3f6f71d | 3589 | if (from_tty) |
c906108c | 3590 | { |
c3f6f71d JM |
3591 | exec_file = get_exec_file (0); |
3592 | ||
3593 | if (exec_file) | |
3594 | printf_filtered ("Attaching to program `%s', %s\n", | |
39f77062 | 3595 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3596 | else |
39f77062 KB |
3597 | printf_filtered ("Attaching to %s\n", |
3598 | target_pid_to_str (pid_to_ptid (pid))); | |
c3f6f71d JM |
3599 | |
3600 | fflush (stdout); | |
c906108c | 3601 | } |
39f77062 | 3602 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
c3f6f71d JM |
3603 | push_target (&procfs_ops); |
3604 | } | |
3605 | ||
3606 | static void | |
fba45db2 | 3607 | procfs_detach (char *args, int from_tty) |
c3f6f71d JM |
3608 | { |
3609 | char *exec_file; | |
3610 | int signo = 0; | |
3611 | ||
3612 | if (from_tty) | |
c906108c | 3613 | { |
c3f6f71d JM |
3614 | exec_file = get_exec_file (0); |
3615 | if (exec_file == 0) | |
3616 | exec_file = ""; | |
3617 | printf_filtered ("Detaching from program: %s %s\n", | |
39f77062 | 3618 | exec_file, target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3619 | fflush (stdout); |
c906108c | 3620 | } |
c3f6f71d JM |
3621 | if (args) |
3622 | signo = atoi (args); | |
3623 | ||
3624 | do_detach (signo); | |
39f77062 | 3625 | inferior_ptid = null_ptid; |
c3f6f71d | 3626 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ |
c906108c SS |
3627 | } |
3628 | ||
39f77062 KB |
3629 | static ptid_t |
3630 | do_attach (ptid_t ptid) | |
c906108c | 3631 | { |
c3f6f71d JM |
3632 | procinfo *pi; |
3633 | int fail; | |
3634 | ||
39f77062 | 3635 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
c3f6f71d JM |
3636 | perror ("procfs: out of memory in 'attach'"); |
3637 | ||
3638 | if (!open_procinfo_files (pi, FD_CTL)) | |
3639 | { | |
3640 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3641 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
39f77062 | 3642 | PIDGET (ptid)); |
c3f6f71d JM |
3643 | dead_procinfo (pi, errmsg, NOKILL); |
3644 | } | |
c906108c | 3645 | |
c3f6f71d JM |
3646 | /* Stop the process (if it isn't already stopped). */ |
3647 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3648 | { |
c3f6f71d JM |
3649 | pi->was_stopped = 1; |
3650 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3651 | } |
3652 | else | |
3653 | { | |
c3f6f71d JM |
3654 | pi->was_stopped = 0; |
3655 | /* Set the process to run again when we close it. */ | |
3656 | if (!proc_set_run_on_last_close (pi)) | |
3657 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3658 | ||
3659 | /* Now stop the process. */ | |
3660 | if (!proc_stop_process (pi)) | |
3661 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3662 | pi->ignore_next_sigstop = 1; | |
c906108c | 3663 | } |
c3f6f71d JM |
3664 | /* Save some of the /proc state to be restored if we detach. */ |
3665 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3666 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3667 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3668 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3669 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3670 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3671 | NOKILL); | |
37de36c6 | 3672 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3673 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
3674 | NOKILL); | |
3675 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3676 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3677 | ||
3678 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3679 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3680 | ||
3681 | /* Let GDB know that the inferior was attached. */ | |
3682 | attach_flag = 1; | |
3683 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3684 | } |
3685 | ||
3686 | static void | |
fba45db2 | 3687 | do_detach (int signo) |
c906108c | 3688 | { |
c3f6f71d | 3689 | procinfo *pi; |
c906108c | 3690 | |
c3f6f71d | 3691 | /* Find procinfo for the main process */ |
39f77062 | 3692 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3693 | if (signo) |
3694 | if (!proc_set_current_signal (pi, signo)) | |
3695 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3696 | |
c3f6f71d JM |
3697 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3698 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3699 | |
c3f6f71d JM |
3700 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3701 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3702 | ||
37de36c6 | 3703 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3704 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3705 | ||
37de36c6 | 3706 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3707 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3708 | ||
3709 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3710 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3711 | ||
3712 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3713 | if (signo || !(pi->was_stopped) || | |
3714 | query ("Was stopped when attached, make it runnable again? ")) | |
3715 | { | |
3716 | /* Clear any pending signal. */ | |
3717 | if (!proc_clear_current_fault (pi)) | |
3718 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3719 | ||
3720 | if (!proc_set_run_on_last_close (pi)) | |
3721 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3722 | } | |
3723 | ||
3724 | attach_flag = 0; | |
3725 | destroy_procinfo (pi); | |
c906108c SS |
3726 | } |
3727 | ||
c3f6f71d JM |
3728 | /* |
3729 | * fetch_registers | |
3730 | * | |
3731 | * Since the /proc interface cannot give us individual registers, | |
3732 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3733 | * This results in the possibility that we will do unnecessarily many | |
3734 | * fetches, since we may be called repeatedly for individual registers. | |
3735 | * So we cache the results, and mark the cache invalid when the process | |
3736 | * is resumed. | |
3737 | */ | |
3738 | ||
c906108c | 3739 | static void |
fba45db2 | 3740 | procfs_fetch_registers (int regno) |
c906108c | 3741 | { |
c3f6f71d JM |
3742 | gdb_fpregset_t *fpregs; |
3743 | gdb_gregset_t *gregs; | |
3744 | procinfo *pi; | |
3745 | int pid; | |
3746 | int tid; | |
c906108c | 3747 | |
39f77062 KB |
3748 | pid = PIDGET (inferior_ptid); |
3749 | tid = TIDGET (inferior_ptid); | |
c3f6f71d JM |
3750 | |
3751 | /* First look up procinfo for the main process. */ | |
3752 | pi = find_procinfo_or_die (pid, 0); | |
3753 | ||
3754 | /* If the event thread is not the same as GDB's requested thread | |
39f77062 | 3755 | (ie. inferior_ptid), then look up procinfo for the requested |
c3f6f71d JM |
3756 | thread. */ |
3757 | if ((tid != 0) && | |
3758 | (tid != proc_get_current_thread (pi))) | |
3759 | pi = find_procinfo_or_die (pid, tid); | |
3760 | ||
3761 | if (pi == NULL) | |
3762 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
39f77062 | 3763 | target_pid_to_str (inferior_ptid)); |
c3f6f71d JM |
3764 | |
3765 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3766 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3767 | ||
3768 | supply_gregset (gregs); | |
3769 | ||
60054393 MS |
3770 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3771 | { | |
3772 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3773 | regno == PC_REGNUM || | |
3774 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3775 | regno == FP_REGNUM || | |
3776 | regno == SP_REGNUM) | |
3777 | return; /* not a floating point register */ | |
c5aa993b | 3778 | |
60054393 MS |
3779 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3780 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3781 | |
60054393 MS |
3782 | supply_fpregset (fpregs); |
3783 | } | |
c906108c SS |
3784 | } |
3785 | ||
c3f6f71d JM |
3786 | /* Get ready to modify the registers array. On machines which store |
3787 | individual registers, this doesn't need to do anything. On | |
3788 | machines which store all the registers in one fell swoop, such as | |
3789 | /proc, this makes sure that registers contains all the registers | |
3790 | from the program being debugged. */ | |
3791 | ||
c906108c | 3792 | static void |
fba45db2 | 3793 | procfs_prepare_to_store (void) |
c906108c | 3794 | { |
c3f6f71d JM |
3795 | #ifdef CHILD_PREPARE_TO_STORE |
3796 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3797 | #endif |
c906108c SS |
3798 | } |
3799 | ||
3800 | /* | |
c3f6f71d JM |
3801 | * store_registers |
3802 | * | |
3803 | * Since the /proc interface will not read individual registers, | |
3804 | * we will cache these requests until the process is resumed, and | |
3805 | * only then write them back to the inferior process. | |
3806 | * | |
3807 | * FIXME: is that a really bad idea? Have to think about cases | |
3808 | * where writing one register might affect the value of others, etc. | |
3809 | */ | |
c906108c | 3810 | |
c3f6f71d | 3811 | static void |
fba45db2 | 3812 | procfs_store_registers (int regno) |
c3f6f71d JM |
3813 | { |
3814 | gdb_fpregset_t *fpregs; | |
3815 | gdb_gregset_t *gregs; | |
3816 | procinfo *pi; | |
3817 | int pid; | |
3818 | int tid; | |
c906108c | 3819 | |
39f77062 KB |
3820 | pid = PIDGET (inferior_ptid); |
3821 | tid = TIDGET (inferior_ptid); | |
c906108c | 3822 | |
c3f6f71d JM |
3823 | /* First find procinfo for main process */ |
3824 | pi = find_procinfo_or_die (pid, 0); | |
3825 | ||
3826 | /* If current lwp for process is not the same as requested thread | |
39f77062 | 3827 | (ie. inferior_ptid), then find procinfo for the requested thread. */ |
c3f6f71d JM |
3828 | |
3829 | if ((tid != 0) && | |
3830 | (tid != proc_get_current_thread (pi))) | |
3831 | pi = find_procinfo_or_die (pid, tid); | |
3832 | ||
3833 | if (pi == NULL) | |
3834 | error ("procfs: store_registers: failed to find procinfo for %s", | |
39f77062 | 3835 | target_pid_to_str (inferior_ptid)); |
c906108c | 3836 | |
c3f6f71d JM |
3837 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3838 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3839 | |
c3f6f71d JM |
3840 | fill_gregset (gregs, regno); |
3841 | if (!proc_set_gregs (pi)) | |
3842 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3843 | |
60054393 MS |
3844 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3845 | { | |
3846 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3847 | regno == PC_REGNUM || | |
3848 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3849 | regno == FP_REGNUM || | |
3850 | regno == SP_REGNUM) | |
3851 | return; /* not a floating point register */ | |
3852 | ||
3853 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3854 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3855 | ||
3856 | fill_fpregset (fpregs, regno); | |
3857 | if (!proc_set_fpregs (pi)) | |
3858 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3859 | } | |
c3f6f71d | 3860 | } |
c906108c | 3861 | |
37de36c6 KB |
3862 | static int |
3863 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3864 | { | |
3865 | ||
3866 | #ifdef SYS_lwp_exit | |
3867 | if (scall == SYS_lwp_exit) | |
3868 | return 1; | |
3869 | #endif | |
3870 | #ifdef SYS_lwpexit | |
3871 | if (scall == SYS_lwpexit) | |
3872 | return 1; | |
3873 | #endif | |
3874 | return 0; | |
3875 | } | |
3876 | ||
3877 | static int | |
3878 | syscall_is_exit (procinfo *pi, int scall) | |
3879 | { | |
3880 | #ifdef SYS_exit | |
3881 | if (scall == SYS_exit) | |
3882 | return 1; | |
3883 | #endif | |
3884 | #ifdef DYNAMIC_SYSCALLS | |
3885 | if (find_syscall (pi, "_exit") == scall) | |
3886 | return 1; | |
3887 | #endif | |
3888 | return 0; | |
3889 | } | |
3890 | ||
3891 | static int | |
3892 | syscall_is_exec (procinfo *pi, int scall) | |
3893 | { | |
3894 | #ifdef SYS_exec | |
3895 | if (scall == SYS_exec) | |
3896 | return 1; | |
3897 | #endif | |
3898 | #ifdef SYS_execv | |
3899 | if (scall == SYS_execv) | |
3900 | return 1; | |
3901 | #endif | |
3902 | #ifdef SYS_execve | |
3903 | if (scall == SYS_execve) | |
3904 | return 1; | |
3905 | #endif | |
3906 | #ifdef DYNAMIC_SYSCALLS | |
3907 | if (find_syscall (pi, "_execve")) | |
3908 | return 1; | |
3909 | if (find_syscall (pi, "ra_execve")) | |
3910 | return 1; | |
3911 | #endif | |
3912 | return 0; | |
3913 | } | |
3914 | ||
3915 | static int | |
3916 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3917 | { | |
3918 | #ifdef SYS_lwp_create | |
3919 | if (scall == SYS_lwp_create) | |
3920 | return 1; | |
3921 | #endif | |
3922 | #ifdef SYS_lwpcreate | |
3923 | if (scall == SYS_lwpcreate) | |
3924 | return 1; | |
3925 | #endif | |
3926 | return 0; | |
3927 | } | |
3928 | ||
c3f6f71d JM |
3929 | /* |
3930 | * Function: target_wait | |
3931 | * | |
3932 | * Retrieve the next stop event from the child process. | |
3933 | * If child has not stopped yet, wait for it to stop. | |
3934 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3935 | * into gdb internal event codes. | |
3936 | * | |
3937 | * Return: id of process (and possibly thread) that incurred the event. | |
3938 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3939 | */ |
3940 | ||
39f77062 KB |
3941 | static ptid_t |
3942 | procfs_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c | 3943 | { |
c3f6f71d JM |
3944 | /* First cut: loosely based on original version 2.1 */ |
3945 | procinfo *pi; | |
39f77062 KB |
3946 | int wstat; |
3947 | int temp_tid; | |
3948 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3949 | int why, what, flags; |
3950 | int retry = 0; | |
c906108c | 3951 | |
c3f6f71d | 3952 | wait_again: |
c906108c | 3953 | |
c3f6f71d JM |
3954 | retry++; |
3955 | wstat = 0; | |
39f77062 | 3956 | retval = pid_to_ptid (-1); |
c906108c | 3957 | |
c3f6f71d | 3958 | /* Find procinfo for main process */ |
39f77062 | 3959 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3960 | if (pi) |
c906108c | 3961 | { |
c3f6f71d JM |
3962 | /* We must assume that the status is stale now... */ |
3963 | pi->status_valid = 0; | |
3964 | pi->gregs_valid = 0; | |
3965 | pi->fpregs_valid = 0; | |
3966 | ||
3967 | #if 0 /* just try this out... */ | |
3968 | flags = proc_flags (pi); | |
3969 | why = proc_why (pi); | |
3970 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3971 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3972 | #endif | |
3973 | /* If child is not stopped, wait for it to stop. */ | |
3974 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3975 | !proc_wait_for_stop (pi)) | |
c906108c | 3976 | { |
c3f6f71d JM |
3977 | /* wait_for_stop failed: has the child terminated? */ |
3978 | if (errno == ENOENT) | |
c906108c | 3979 | { |
39f77062 KB |
3980 | int wait_retval; |
3981 | ||
c3f6f71d | 3982 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 3983 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 3984 | |
39f77062 | 3985 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
c3f6f71d | 3986 | error ("procfs: couldn't stop process %d: wait returned %d\n", |
39f77062 | 3987 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
3988 | /* FIXME: might I not just use waitpid? |
3989 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 3990 | retval = pid_to_ptid (wait_retval); |
c906108c | 3991 | } |
d1566ff5 FN |
3992 | else if (errno == EINTR) |
3993 | goto wait_again; | |
c3f6f71d | 3994 | else |
c906108c | 3995 | { |
c3f6f71d JM |
3996 | /* Unknown error from wait_for_stop. */ |
3997 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3998 | } |
c3f6f71d JM |
3999 | } |
4000 | else | |
4001 | { | |
4002 | /* This long block is reached if either: | |
4003 | a) the child was already stopped, or | |
4004 | b) we successfully waited for the child with wait_for_stop. | |
4005 | This block will analyze the /proc status, and translate it | |
4006 | into a waitstatus for GDB. | |
4007 | ||
4008 | If we actually had to call wait because the /proc file | |
4009 | is gone (child terminated), then we skip this block, | |
4010 | because we already have a waitstatus. */ | |
4011 | ||
4012 | flags = proc_flags (pi); | |
4013 | why = proc_why (pi); | |
4014 | what = proc_what (pi); | |
4015 | ||
c3f6f71d | 4016 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4017 | { |
c3f6f71d JM |
4018 | #ifdef PR_ASYNC |
4019 | /* If it's running async (for single_thread control), | |
4020 | set it back to normal again. */ | |
4021 | if (flags & PR_ASYNC) | |
4022 | if (!proc_unset_async (pi)) | |
4023 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
4024 | #endif | |
4025 | ||
4026 | if (info_verbose) | |
4027 | proc_prettyprint_why (why, what, 1); | |
4028 | ||
4029 | /* The 'pid' we will return to GDB is composed of | |
4030 | the process ID plus the lwp ID. */ | |
4031 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
4032 | ||
4033 | switch (why) { | |
4034 | case PR_SIGNALLED: | |
4035 | wstat = (what << 8) | 0177; | |
4036 | break; | |
4037 | case PR_SYSENTRY: | |
37de36c6 | 4038 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 4039 | { |
37de36c6 KB |
4040 | printf_filtered ("[%s exited]\n", |
4041 | target_pid_to_str (retval)); | |
4042 | delete_thread (retval); | |
4043 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4044 | return retval; | |
4045 | } | |
4046 | else if (syscall_is_exit (pi, what)) | |
4047 | { | |
4048 | /* Handle SYS_exit call only */ | |
4049 | /* Stopped at entry to SYS_exit. | |
4050 | Make it runnable, resume it, then use | |
4051 | the wait system call to get its exit code. | |
4052 | Proc_run_process always clears the current | |
4053 | fault and signal. | |
4054 | Then return its exit status. */ | |
4055 | pi->status_valid = 0; | |
4056 | wstat = 0; | |
4057 | /* FIXME: what we should do is return | |
4058 | TARGET_WAITKIND_SPURIOUS. */ | |
4059 | if (!proc_run_process (pi, 0, 0)) | |
4060 | proc_error (pi, "target_wait, run_process", __LINE__); | |
4061 | if (attach_flag) | |
c3f6f71d | 4062 | { |
37de36c6 KB |
4063 | /* Don't call wait: simulate waiting for exit, |
4064 | return a "success" exit code. Bogus: what if | |
4065 | it returns something else? */ | |
4066 | wstat = 0; | |
39f77062 | 4067 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
4068 | } |
4069 | else | |
4070 | { | |
4071 | int temp = wait (&wstat); | |
4072 | ||
4073 | /* FIXME: shouldn't I make sure I get the right | |
4074 | event from the right process? If (for | |
4075 | instance) I have killed an earlier inferior | |
4076 | process but failed to clean up after it | |
4077 | somehow, I could get its termination event | |
4078 | here. */ | |
4079 | ||
4080 | /* If wait returns -1, that's what we return to GDB. */ | |
4081 | if (temp < 0) | |
39f77062 | 4082 | retval = pid_to_ptid (temp); |
c3f6f71d | 4083 | } |
c3f6f71d | 4084 | } |
37de36c6 KB |
4085 | else |
4086 | { | |
4087 | printf_filtered ("procfs: trapped on entry to "); | |
4088 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4089 | printf_filtered ("\n"); | |
4090 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4091 | { |
37de36c6 | 4092 | long i, nsysargs, *sysargs; |
c3f6f71d | 4093 | |
37de36c6 KB |
4094 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4095 | (sysargs = proc_sysargs (pi)) != NULL) | |
4096 | { | |
4097 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4098 | for (i = 0; i < nsysargs; i++) | |
4099 | printf_filtered ("#%ld: 0x%08lx\n", | |
4100 | i, sysargs[i]); | |
4101 | } | |
c3f6f71d | 4102 | |
c3f6f71d | 4103 | } |
c3f6f71d | 4104 | #endif |
37de36c6 KB |
4105 | if (status) |
4106 | { | |
4107 | /* How to exit gracefully, returning "unknown event" */ | |
4108 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4109 | return inferior_ptid; |
37de36c6 KB |
4110 | } |
4111 | else | |
4112 | { | |
4113 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4114 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4115 | goto wait_again; |
4116 | } | |
4117 | } | |
4118 | break; | |
4119 | case PR_SYSEXIT: | |
4120 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4121 | { |
37de36c6 KB |
4122 | /* Hopefully this is our own "fork-child" execing |
4123 | the real child. Hoax this event into a trap, and | |
4124 | GDB will see the child about to execute its start | |
4125 | address. */ | |
4126 | wstat = (SIGTRAP << 8) | 0177; | |
4127 | } | |
4128 | else if (syscall_is_lwp_create (pi, what)) | |
4129 | { | |
4130 | /* | |
4131 | * This syscall is somewhat like fork/exec. | |
4132 | * We will get the event twice: once for the parent LWP, | |
4133 | * and once for the child. We should already know about | |
4134 | * the parent LWP, but the child will be new to us. So, | |
4135 | * whenever we get this event, if it represents a new | |
4136 | * thread, simply add the thread to the list. | |
4137 | */ | |
c3f6f71d | 4138 | |
37de36c6 | 4139 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4140 | temp_tid = proc_get_current_thread (pi); |
4141 | if (!find_procinfo (pi->pid, temp_tid)) | |
4142 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4143 | |
39f77062 | 4144 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4145 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4146 | if (!in_thread_list (temp_ptid)) |
c3f6f71d | 4147 | { |
39f77062 KB |
4148 | printf_filtered ("[New %s]\n", |
4149 | target_pid_to_str (temp_ptid)); | |
4150 | add_thread (temp_ptid); | |
c3f6f71d | 4151 | } |
37de36c6 KB |
4152 | /* Return to WFI, but tell it to immediately resume. */ |
4153 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4154 | return inferior_ptid; |
37de36c6 KB |
4155 | } |
4156 | else if (syscall_is_lwp_exit (pi, what)) | |
4157 | { | |
4158 | printf_filtered ("[%s exited]\n", | |
4159 | target_pid_to_str (retval)); | |
4160 | delete_thread (retval); | |
4161 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4162 | return retval; | |
c3f6f71d | 4163 | } |
37de36c6 KB |
4164 | else if (0) |
4165 | { | |
4166 | /* FIXME: Do we need to handle SYS_sproc, | |
4167 | SYS_fork, or SYS_vfork here? The old procfs | |
4168 | seemed to use this event to handle threads on | |
4169 | older (non-LWP) systems, where I'm assuming | |
4170 | that threads were actually separate processes. | |
4171 | Irix, maybe? Anyway, low priority for now. */ | |
4172 | } | |
4173 | else | |
4174 | { | |
4175 | printf_filtered ("procfs: trapped on exit from "); | |
4176 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4177 | printf_filtered ("\n"); | |
4178 | #ifndef PIOCSSPCACT | |
4179 | { | |
4180 | long i, nsysargs, *sysargs; | |
4181 | ||
4182 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4183 | (sysargs = proc_sysargs (pi)) != NULL) | |
4184 | { | |
4185 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4186 | for (i = 0; i < nsysargs; i++) | |
4187 | printf_filtered ("#%ld: 0x%08lx\n", | |
4188 | i, sysargs[i]); | |
4189 | } | |
4190 | } | |
c3f6f71d | 4191 | #endif |
37de36c6 | 4192 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4193 | return inferior_ptid; |
37de36c6 | 4194 | } |
c3f6f71d JM |
4195 | break; |
4196 | case PR_REQUESTED: | |
4197 | #if 0 /* FIXME */ | |
4198 | wstat = (SIGSTOP << 8) | 0177; | |
4199 | break; | |
4200 | #else | |
4201 | if (retry < 5) | |
4202 | { | |
4203 | printf_filtered ("Retry #%d:\n", retry); | |
4204 | pi->status_valid = 0; | |
4205 | goto wait_again; | |
4206 | } | |
4207 | else | |
4208 | { | |
4209 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4210 | temp_tid = proc_get_current_thread (pi); |
4211 | if (!find_procinfo (pi->pid, temp_tid)) | |
4212 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4213 | |
4214 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4215 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4216 | if (!in_thread_list (temp_ptid)) | |
c3f6f71d | 4217 | { |
0d06e24b | 4218 | printf_filtered ("[New %s]\n", |
39f77062 KB |
4219 | target_pid_to_str (temp_ptid)); |
4220 | add_thread (temp_ptid); | |
c3f6f71d JM |
4221 | } |
4222 | ||
4223 | status->kind = TARGET_WAITKIND_STOPPED; | |
4224 | status->value.sig = 0; | |
4225 | return retval; | |
4226 | } | |
4227 | #endif | |
4228 | case PR_JOBCONTROL: | |
4229 | wstat = (what << 8) | 0177; | |
4230 | break; | |
4231 | case PR_FAULTED: | |
4232 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
4233 | #ifdef FLTWATCH | |
4234 | case FLTWATCH: | |
4235 | wstat = (SIGTRAP << 8) | 0177; | |
4236 | break; | |
4237 | #endif | |
4238 | #ifdef FLTKWATCH | |
4239 | case FLTKWATCH: | |
4240 | wstat = (SIGTRAP << 8) | 0177; | |
4241 | break; | |
4242 | #endif | |
4243 | /* FIXME: use si_signo where possible. */ | |
4244 | case FLTPRIV: | |
4245 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4246 | case FLTILL: | |
4247 | #endif | |
4248 | wstat = (SIGILL << 8) | 0177; | |
4249 | break; | |
4250 | case FLTBPT: | |
4251 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4252 | case FLTTRACE: | |
4253 | #endif | |
4254 | wstat = (SIGTRAP << 8) | 0177; | |
4255 | break; | |
4256 | case FLTSTACK: | |
4257 | case FLTACCESS: | |
4258 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4259 | case FLTBOUNDS: | |
4260 | #endif | |
4261 | wstat = (SIGSEGV << 8) | 0177; | |
4262 | break; | |
4263 | case FLTIOVF: | |
4264 | case FLTIZDIV: | |
4265 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4266 | case FLTFPE: | |
4267 | #endif | |
4268 | wstat = (SIGFPE << 8) | 0177; | |
4269 | break; | |
4270 | case FLTPAGE: /* Recoverable page fault */ | |
4271 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4272 | retval = pid_to_ptid (-1); |
c3f6f71d JM |
4273 | printf_filtered ("procfs:%d -- ", __LINE__); |
4274 | printf_filtered ("child stopped for unknown reason:\n"); | |
4275 | proc_prettyprint_why (why, what, 1); | |
4276 | error ("... giving up..."); | |
4277 | break; | |
4278 | } | |
4279 | break; /* case PR_FAULTED: */ | |
4280 | default: /* switch (why) unmatched */ | |
4281 | printf_filtered ("procfs:%d -- ", __LINE__); | |
4282 | printf_filtered ("child stopped for unknown reason:\n"); | |
4283 | proc_prettyprint_why (why, what, 1); | |
4284 | error ("... giving up..."); | |
4285 | break; | |
4286 | } | |
4287 | /* | |
4288 | * Got this far without error: | |
4289 | * If retval isn't in the threads database, add it. | |
4290 | */ | |
39f77062 KB |
4291 | if (PIDGET (retval) > 0 && |
4292 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4293 | !in_thread_list (retval)) |
c906108c | 4294 | { |
c3f6f71d JM |
4295 | /* |
4296 | * We have a new thread. | |
4297 | * We need to add it both to GDB's list and to our own. | |
4298 | * If we don't create a procinfo, resume may be unhappy | |
4299 | * later. | |
4300 | */ | |
4301 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
4302 | add_thread (retval); | |
4303 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4304 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
4305 | ||
4306 | /* In addition, it's possible that this is the first | |
4307 | * new thread we've seen, in which case we may not | |
39f77062 | 4308 | * have created entries for inferior_ptid yet. |
c3f6f71d | 4309 | */ |
39f77062 | 4310 | if (TIDGET (inferior_ptid) != 0) |
c3f6f71d | 4311 | { |
39f77062 KB |
4312 | if (!in_thread_list (inferior_ptid)) |
4313 | add_thread (inferior_ptid); | |
4314 | if (find_procinfo (PIDGET (inferior_ptid), | |
4315 | TIDGET (inferior_ptid)) == NULL) | |
4316 | create_procinfo (PIDGET (inferior_ptid), | |
4317 | TIDGET (inferior_ptid)); | |
c3f6f71d | 4318 | } |
c906108c | 4319 | } |
c906108c | 4320 | } |
c3f6f71d | 4321 | else /* flags do not indicate STOPPED */ |
c906108c | 4322 | { |
c3f6f71d JM |
4323 | /* surely this can't happen... */ |
4324 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4325 | __LINE__); | |
4326 | proc_prettyprint_flags (flags, 1); | |
4327 | error ("procfs: ...giving up..."); | |
c906108c | 4328 | } |
c906108c | 4329 | } |
c906108c | 4330 | |
c3f6f71d JM |
4331 | if (status) |
4332 | store_waitstatus (status, wstat); | |
c906108c SS |
4333 | } |
4334 | ||
c3f6f71d JM |
4335 | return retval; |
4336 | } | |
c906108c | 4337 | |
d0849a9a KB |
4338 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4339 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4340 | otherwise transfer them from the target. TARGET is unused. | |
4341 | ||
4342 | The return value is 0 if an error occurred or no bytes were | |
4343 | transferred. Otherwise, it will be a positive value which | |
4344 | indicates the number of bytes transferred between gdb and the | |
4345 | target. (Note that the interface also makes provisions for | |
4346 | negative values, but this capability isn't implemented here.) */ | |
4347 | ||
c3f6f71d | 4348 | static int |
d0849a9a | 4349 | procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite, |
37de36c6 | 4350 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4351 | { |
4352 | procinfo *pi; | |
4353 | int nbytes = 0; | |
c906108c | 4354 | |
c3f6f71d | 4355 | /* Find procinfo for main process */ |
39f77062 | 4356 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4357 | if (pi->as_fd == 0 && |
4358 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4359 | { |
c3f6f71d JM |
4360 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4361 | return 0; | |
c906108c | 4362 | } |
c906108c | 4363 | |
c3f6f71d | 4364 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4365 | { |
c3f6f71d | 4366 | if (dowrite) |
c906108c | 4367 | { |
c3f6f71d JM |
4368 | #ifdef NEW_PROC_API |
4369 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4370 | #else |
c3f6f71d | 4371 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4372 | #endif |
c3f6f71d | 4373 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4374 | } |
c3f6f71d | 4375 | else |
c906108c | 4376 | { |
c3f6f71d JM |
4377 | PROCFS_NOTE ("read memory: \n"); |
4378 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4379 | } |
c3f6f71d | 4380 | if (nbytes < 0) |
c906108c | 4381 | { |
c3f6f71d | 4382 | nbytes = 0; |
c906108c | 4383 | } |
c906108c | 4384 | } |
c3f6f71d | 4385 | return nbytes; |
c906108c SS |
4386 | } |
4387 | ||
4388 | /* | |
c3f6f71d JM |
4389 | * Function: invalidate_cache |
4390 | * | |
4391 | * Called by target_resume before making child runnable. | |
4392 | * Mark cached registers and status's invalid. | |
4393 | * If there are "dirty" caches that need to be written back | |
4394 | * to the child process, do that. | |
4395 | * | |
4396 | * File descriptors are also cached. | |
4397 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4398 | * However, as they are expensive to open, we don't want to throw them | |
4399 | * away indescriminately either. As a compromise, we will keep the | |
4400 | * file descriptors for the parent process, but discard any file | |
4401 | * descriptors we may have accumulated for the threads. | |
4402 | * | |
4403 | * Return value: | |
4404 | * As this function is called by iterate_over_threads, it always | |
4405 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
4406 | */ |
4407 | ||
c3f6f71d JM |
4408 | |
4409 | static int | |
fba45db2 | 4410 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4411 | { |
c3f6f71d JM |
4412 | /* |
4413 | * About to run the child; invalidate caches and do any other cleanup. | |
4414 | */ | |
c906108c | 4415 | |
c3f6f71d JM |
4416 | #if 0 |
4417 | if (pi->gregs_dirty) | |
4418 | if (parent == NULL || | |
4419 | proc_get_current_thread (parent) != pi->tid) | |
4420 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4421 | proc_warn (pi, "target_resume, set_gregs", | |
4422 | __LINE__); | |
60054393 MS |
4423 | if (FP0_REGNUM >= 0) |
4424 | if (pi->fpregs_dirty) | |
4425 | if (parent == NULL || | |
4426 | proc_get_current_thread (parent) != pi->tid) | |
4427 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4428 | proc_warn (pi, "target_resume, set_fpregs", | |
4429 | __LINE__); | |
c906108c | 4430 | #endif |
c906108c | 4431 | |
c3f6f71d | 4432 | if (parent != NULL) |
c906108c | 4433 | { |
c3f6f71d JM |
4434 | /* The presence of a parent indicates that this is an LWP. |
4435 | Close any file descriptors that it might have open. | |
4436 | We don't do this to the master (parent) procinfo. */ | |
4437 | ||
4438 | close_procinfo_files (pi); | |
c906108c | 4439 | } |
c3f6f71d JM |
4440 | pi->gregs_valid = 0; |
4441 | pi->fpregs_valid = 0; | |
4442 | #if 0 | |
4443 | pi->gregs_dirty = 0; | |
4444 | pi->fpregs_dirty = 0; | |
c906108c | 4445 | #endif |
c3f6f71d JM |
4446 | pi->status_valid = 0; |
4447 | pi->threads_valid = 0; | |
c906108c | 4448 | |
c3f6f71d | 4449 | return 0; |
c906108c SS |
4450 | } |
4451 | ||
0fda6bd2 | 4452 | #if 0 |
c906108c | 4453 | /* |
c3f6f71d JM |
4454 | * Function: make_signal_thread_runnable |
4455 | * | |
4456 | * A callback function for iterate_over_threads. | |
4457 | * Find the asynchronous signal thread, and make it runnable. | |
4458 | * See if that helps matters any. | |
c906108c SS |
4459 | */ |
4460 | ||
c3f6f71d | 4461 | static int |
fba45db2 | 4462 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4463 | { |
c3f6f71d JM |
4464 | #ifdef PR_ASLWP |
4465 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4466 | { |
c3f6f71d JM |
4467 | if (!proc_run_process (pi, 0, -1)) |
4468 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4469 | return 1; | |
c906108c | 4470 | } |
c906108c | 4471 | #endif |
c3f6f71d | 4472 | return 0; |
c906108c | 4473 | } |
0fda6bd2 | 4474 | #endif |
c906108c SS |
4475 | |
4476 | /* | |
c3f6f71d JM |
4477 | * Function: target_resume |
4478 | * | |
4479 | * Make the child process runnable. Normally we will then call | |
4480 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4481 | * | |
4482 | * Arguments: | |
4483 | * step: if true, then arrange for the child to stop again | |
4484 | * after executing a single instruction. | |
4485 | * signo: if zero, then cancel any pending signal. | |
4486 | * If non-zero, then arrange for the indicated signal | |
4487 | * to be delivered to the child when it runs. | |
4488 | * pid: if -1, then allow any child thread to run. | |
4489 | * if non-zero, then allow only the indicated thread to run. | |
4490 | ******* (not implemented yet) | |
c906108c SS |
4491 | */ |
4492 | ||
4493 | static void | |
39f77062 | 4494 | procfs_resume (ptid_t ptid, int step, enum target_signal signo) |
c906108c | 4495 | { |
c3f6f71d JM |
4496 | procinfo *pi, *thread; |
4497 | int native_signo; | |
4498 | ||
4499 | /* 2.1: | |
4500 | prrun.prflags |= PRSVADDR; | |
4501 | prrun.pr_vaddr = $PC; set resume address | |
4502 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4503 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4504 | prrun.prflags |= PRCFAULT; clear current fault. | |
4505 | ||
4506 | PRSTRACE and PRSFAULT can be done by other means | |
4507 | (proc_trace_signals, proc_trace_faults) | |
4508 | PRSVADDR is unnecessary. | |
4509 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4510 | This basically leaves PRSTEP and PRCSIG. | |
4511 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4512 | So basically PR_STEP is the sole argument that must be passed | |
4513 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4514 | ||
4515 | /* Find procinfo for main process */ | |
39f77062 | 4516 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4517 | |
4518 | /* First cut: ignore pid argument */ | |
4519 | errno = 0; | |
c906108c | 4520 | |
c3f6f71d JM |
4521 | /* Convert signal to host numbering. */ |
4522 | if (signo == 0 || | |
0fda6bd2 | 4523 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4524 | native_signo = 0; |
4525 | else | |
4526 | native_signo = target_signal_to_host (signo); | |
c906108c | 4527 | |
c3f6f71d | 4528 | pi->ignore_next_sigstop = 0; |
c906108c | 4529 | |
c3f6f71d JM |
4530 | /* Running the process voids all cached registers and status. */ |
4531 | /* Void the threads' caches first */ | |
4532 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4533 | /* Void the process procinfo's caches. */ | |
4534 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4535 | |
39f77062 | 4536 | if (PIDGET (ptid) != -1) |
c906108c | 4537 | { |
c3f6f71d | 4538 | /* Resume a specific thread, presumably suppressing the others. */ |
39f77062 | 4539 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4540 | if (thread != NULL) |
c906108c | 4541 | { |
c3f6f71d JM |
4542 | if (thread->tid != 0) |
4543 | { | |
4544 | /* We're to resume a specific thread, and not the others. | |
4545 | * Set the child process's PR_ASYNC flag. | |
4546 | */ | |
4547 | #ifdef PR_ASYNC | |
4548 | if (!proc_set_async (pi)) | |
4549 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4550 | #endif | |
4551 | #if 0 | |
4552 | proc_iterate_over_threads (pi, | |
4553 | make_signal_thread_runnable, | |
4554 | NULL); | |
4555 | #endif | |
4556 | pi = thread; /* substitute the thread's procinfo for run */ | |
4557 | } | |
c906108c SS |
4558 | } |
4559 | } | |
c906108c | 4560 | |
c3f6f71d | 4561 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4562 | { |
c3f6f71d JM |
4563 | if (errno == EBUSY) |
4564 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4565 | else | |
4566 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4567 | } |
c3f6f71d | 4568 | } |
c906108c | 4569 | |
c3f6f71d JM |
4570 | /* |
4571 | * Function: register_gdb_signals | |
4572 | * | |
4573 | * Traverse the list of signals that GDB knows about | |
4574 | * (see "handle" command), and arrange for the target | |
4575 | * to be stopped or not, according to these settings. | |
4576 | * | |
4577 | * Returns non-zero for success, zero for failure. | |
4578 | */ | |
c906108c | 4579 | |
c3f6f71d | 4580 | static int |
37de36c6 | 4581 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4582 | { |
4583 | int signo; | |
c906108c | 4584 | |
c3f6f71d JM |
4585 | for (signo = 0; signo < NSIG; signo ++) |
4586 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4587 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4588 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4589 | prdelset (signals, signo); | |
4590 | else | |
4591 | praddset (signals, signo); | |
c906108c | 4592 | |
c3f6f71d | 4593 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4594 | } |
4595 | ||
4596 | /* | |
c3f6f71d JM |
4597 | * Function: target_notice_signals |
4598 | * | |
4599 | * Set up to trace signals in the child process. | |
4600 | */ | |
c906108c | 4601 | |
c3f6f71d | 4602 | static void |
39f77062 | 4603 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4604 | { |
37de36c6 | 4605 | gdb_sigset_t signals; |
39f77062 | 4606 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4607 | |
c3f6f71d JM |
4608 | if (proc_get_traced_signals (pi, &signals) && |
4609 | register_gdb_signals (pi, &signals)) | |
4610 | return; | |
4611 | else | |
4612 | proc_error (pi, "notice_signals", __LINE__); | |
4613 | } | |
c906108c | 4614 | |
c3f6f71d JM |
4615 | /* |
4616 | * Function: target_files_info | |
4617 | * | |
4618 | * Print status information about the child process. | |
4619 | */ | |
c906108c | 4620 | |
c3f6f71d | 4621 | static void |
fba45db2 | 4622 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d JM |
4623 | { |
4624 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4625 | attach_flag? "attached": "child", | |
39f77062 | 4626 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4627 | } |
c906108c | 4628 | |
c3f6f71d JM |
4629 | /* |
4630 | * Function: target_open | |
4631 | * | |
4632 | * A dummy: you don't open procfs. | |
c906108c SS |
4633 | */ |
4634 | ||
4635 | static void | |
fba45db2 | 4636 | procfs_open (char *args, int from_tty) |
c906108c | 4637 | { |
c3f6f71d JM |
4638 | error ("Use the \"run\" command to start a Unix child process."); |
4639 | } | |
c906108c | 4640 | |
c3f6f71d JM |
4641 | /* |
4642 | * Function: target_can_run | |
4643 | * | |
4644 | * This tells GDB that this target vector can be invoked | |
4645 | * for "run" or "attach". | |
4646 | */ | |
c906108c | 4647 | |
c3f6f71d JM |
4648 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4649 | be a runnable target. Used by targets | |
4650 | that can sit atop procfs, such as solaris | |
4651 | thread support. */ | |
c906108c | 4652 | |
c906108c | 4653 | |
c3f6f71d | 4654 | static int |
fba45db2 | 4655 | procfs_can_run (void) |
c3f6f71d JM |
4656 | { |
4657 | /* This variable is controlled by modules that sit atop procfs that | |
4658 | may layer their own process structure atop that provided here. | |
4659 | sol-thread.c does this because of the Solaris two-level thread | |
4660 | model. */ | |
4661 | ||
4662 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4663 | |
c3f6f71d JM |
4664 | return !procfs_suppress_run; |
4665 | } | |
c906108c | 4666 | |
c3f6f71d JM |
4667 | /* |
4668 | * Function: target_stop | |
4669 | * | |
4670 | * Stop the child process asynchronously, as when the | |
4671 | * gdb user types control-c or presses a "stop" button. | |
4672 | * | |
4673 | * Works by sending kill(SIGINT) to the child's process group. | |
4674 | */ | |
c906108c | 4675 | |
c3f6f71d | 4676 | static void |
fba45db2 | 4677 | procfs_stop (void) |
c3f6f71d JM |
4678 | { |
4679 | extern pid_t inferior_process_group; | |
c906108c | 4680 | |
c3f6f71d | 4681 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4682 | } |
4683 | ||
c906108c | 4684 | /* |
c3f6f71d JM |
4685 | * Function: unconditionally_kill_inferior |
4686 | * | |
4687 | * Make it die. Wait for it to die. Clean up after it. | |
4688 | * Note: this should only be applied to the real process, | |
4689 | * not to an LWP, because of the check for parent-process. | |
4690 | * If we need this to work for an LWP, it needs some more logic. | |
4691 | */ | |
c906108c | 4692 | |
c3f6f71d | 4693 | static void |
fba45db2 | 4694 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4695 | { |
4696 | int parent_pid; | |
c906108c | 4697 | |
c3f6f71d JM |
4698 | parent_pid = proc_parent_pid (pi); |
4699 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4700 | /* FIXME: use access functions */ | |
4701 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4702 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4703 | file for the inferior. */ | |
4704 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4705 | { | |
4706 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4707 | } | |
4708 | #endif | |
4709 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4710 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4711 | to kill the inferior, otherwise it might remain stopped with a | |
4712 | pending SIGKILL. | |
4713 | We do not check the result of the PIOCSSIG, the inferior might have | |
4714 | died already. */ | |
4715 | { | |
37de36c6 | 4716 | gdb_siginfo_t newsiginfo; |
c906108c | 4717 | |
c3f6f71d JM |
4718 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4719 | newsiginfo.si_signo = SIGKILL; | |
4720 | newsiginfo.si_code = 0; | |
4721 | newsiginfo.si_errno = 0; | |
4722 | newsiginfo.si_pid = getpid (); | |
4723 | newsiginfo.si_uid = getuid (); | |
4724 | /* FIXME: use proc_set_current_signal */ | |
4725 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4726 | } | |
4727 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4728 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4729 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4730 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4731 | destroy_procinfo (pi); | |
c906108c | 4732 | |
c3f6f71d JM |
4733 | /* If pi is GDB's child, wait for it to die. */ |
4734 | if (parent_pid == getpid ()) | |
4735 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4736 | Should we check the returned event? */ | |
4737 | { | |
0d06e24b | 4738 | #if 0 |
c3f6f71d | 4739 | int status, ret; |
c906108c | 4740 | |
c3f6f71d JM |
4741 | ret = waitpid (pi->pid, &status, 0); |
4742 | #else | |
4743 | wait (NULL); | |
4744 | #endif | |
4745 | } | |
4746 | } | |
c906108c | 4747 | |
c3f6f71d JM |
4748 | /* |
4749 | * Function: target_kill_inferior | |
4750 | * | |
4751 | * We're done debugging it, and we want it to go away. | |
4752 | * Then we want GDB to forget all about it. | |
c906108c SS |
4753 | */ |
4754 | ||
c3f6f71d | 4755 | static void |
fba45db2 | 4756 | procfs_kill_inferior (void) |
c906108c | 4757 | { |
39f77062 | 4758 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4759 | { |
4760 | /* Find procinfo for main process */ | |
39f77062 | 4761 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4762 | |
c3f6f71d JM |
4763 | if (pi) |
4764 | unconditionally_kill_inferior (pi); | |
4765 | target_mourn_inferior (); | |
c906108c | 4766 | } |
c3f6f71d JM |
4767 | } |
4768 | ||
4769 | /* | |
4770 | * Function: target_mourn_inferior | |
4771 | * | |
4772 | * Forget we ever debugged this thing! | |
4773 | */ | |
c906108c | 4774 | |
c3f6f71d | 4775 | static void |
fba45db2 | 4776 | procfs_mourn_inferior (void) |
c3f6f71d JM |
4777 | { |
4778 | procinfo *pi; | |
c906108c | 4779 | |
39f77062 | 4780 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4781 | { |
4782 | /* Find procinfo for main process */ | |
39f77062 | 4783 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4784 | if (pi) |
4785 | destroy_procinfo (pi); | |
c906108c | 4786 | } |
c3f6f71d JM |
4787 | unpush_target (&procfs_ops); |
4788 | generic_mourn_inferior (); | |
4789 | } | |
c906108c | 4790 | |
c3f6f71d JM |
4791 | /* |
4792 | * Function: init_inferior | |
4793 | * | |
4794 | * When GDB forks to create a runnable inferior process, | |
4795 | * this function is called on the parent side of the fork. | |
4796 | * It's job is to do whatever is necessary to make the child | |
4797 | * ready to be debugged, and then wait for the child to synchronize. | |
4798 | */ | |
c906108c | 4799 | |
c3f6f71d | 4800 | static void |
fba45db2 | 4801 | procfs_init_inferior (int pid) |
c3f6f71d JM |
4802 | { |
4803 | procinfo *pi; | |
37de36c6 | 4804 | gdb_sigset_t signals; |
c3f6f71d | 4805 | int fail; |
c906108c | 4806 | |
c3f6f71d JM |
4807 | /* This routine called on the parent side (GDB side) |
4808 | after GDB forks the inferior. */ | |
c906108c | 4809 | |
c3f6f71d | 4810 | push_target (&procfs_ops); |
c906108c | 4811 | |
c3f6f71d JM |
4812 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4813 | perror ("procfs: out of memory in 'init_inferior'"); | |
4814 | ||
4815 | if (!open_procinfo_files (pi, FD_CTL)) | |
4816 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4817 | ||
4818 | /* | |
4819 | xmalloc // done | |
4820 | open_procinfo_files // done | |
4821 | link list // done | |
4822 | prfillset (trace) | |
4823 | procfs_notice_signals | |
4824 | prfillset (fault) | |
4825 | prdelset (FLTPAGE) | |
4826 | PIOCWSTOP | |
4827 | PIOCSFAULT | |
4828 | */ | |
4829 | ||
4830 | /* If not stopped yet, wait for it to stop. */ | |
4831 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4832 | !(proc_wait_for_stop (pi))) | |
4833 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4834 | ||
4835 | /* Save some of the /proc state to be restored if we detach. */ | |
4836 | /* FIXME: Why? In case another debugger was debugging it? | |
4837 | We're it's parent, for Ghu's sake! */ | |
4838 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4839 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4840 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4841 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4842 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4843 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4844 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4845 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4846 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4847 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4848 | ||
4849 | /* Register to trace selected signals in the child. */ | |
4850 | prfillset (&signals); | |
4851 | if (!register_gdb_signals (pi, &signals)) | |
4852 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4853 | ||
4854 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4855 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4856 | ||
0d06e24b JM |
4857 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4858 | and possibly even turning ON kill-on-last-close at this point. But | |
4859 | I can't make that change without careful testing which I don't have | |
4860 | time to do right now... */ | |
c3f6f71d JM |
4861 | /* Turn on run-on-last-close flag so that the child |
4862 | will die if GDB goes away for some reason. */ | |
4863 | if (!proc_set_run_on_last_close (pi)) | |
4864 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4865 | ||
4866 | /* The 'process ID' we return to GDB is composed of | |
4867 | the actual process ID plus the lwp ID. */ | |
39f77062 | 4868 | inferior_ptid = MERGEPID (pi->pid, proc_get_current_thread (pi)); |
c906108c | 4869 | |
c3f6f71d JM |
4870 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4871 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4872 | #else | |
4873 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4874 | startup_inferior (2); | |
0d06e24b | 4875 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4876 | } |
c906108c | 4877 | |
c3f6f71d JM |
4878 | /* |
4879 | * Function: set_exec_trap | |
4880 | * | |
4881 | * When GDB forks to create a new process, this function is called | |
4882 | * on the child side of the fork before GDB exec's the user program. | |
4883 | * Its job is to make the child minimally debuggable, so that the | |
4884 | * parent GDB process can connect to the child and take over. | |
4885 | * This function should do only the minimum to make that possible, | |
4886 | * and to synchronize with the parent process. The parent process | |
4887 | * should take care of the details. | |
4888 | */ | |
4889 | ||
4890 | static void | |
fba45db2 | 4891 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4892 | { |
4893 | /* This routine called on the child side (inferior side) | |
4894 | after GDB forks the inferior. It must use only local variables, | |
4895 | because it may be sharing data space with its parent. */ | |
c906108c | 4896 | |
c3f6f71d | 4897 | procinfo *pi; |
37de36c6 | 4898 | sysset_t *exitset; |
c906108c | 4899 | |
c3f6f71d JM |
4900 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4901 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4902 | |
c3f6f71d JM |
4903 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4904 | { | |
4905 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4906 | gdb_flush (gdb_stderr); | |
4907 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4908 | _exit (127); | |
4909 | } | |
c906108c | 4910 | |
c3f6f71d JM |
4911 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4912 | /* OSF method for tracing exec syscalls. Quoting: | |
4913 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4914 | exits from exec system calls because of the user level loader. */ | |
4915 | /* FIXME: make nice and maybe move into an access function. */ | |
4916 | { | |
4917 | int prfs_flags; | |
c906108c | 4918 | |
c3f6f71d JM |
4919 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4920 | { | |
4921 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4922 | gdb_flush (gdb_stderr); | |
4923 | _exit (127); | |
4924 | } | |
4925 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4926 | |
c3f6f71d JM |
4927 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4928 | { | |
4929 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4930 | gdb_flush (gdb_stderr); | |
4931 | _exit (127); | |
4932 | } | |
4933 | } | |
4934 | #else /* not PRFS_STOPEXEC */ | |
4935 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4936 | /* GW: Rationale... | |
4937 | Not all systems with /proc have all the exec* syscalls with the same | |
4938 | names. On the SGI, for example, there is no SYS_exec, but there | |
4939 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4940 | |
37de36c6 KB |
4941 | exitset = sysset_t_alloc (pi); |
4942 | gdb_premptysysset (exitset); | |
c3f6f71d | 4943 | #ifdef SYS_exec |
37de36c6 | 4944 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4945 | #endif |
4946 | #ifdef SYS_execve | |
37de36c6 | 4947 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4948 | #endif |
4949 | #ifdef SYS_execv | |
37de36c6 | 4950 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4951 | #endif |
37de36c6 KB |
4952 | #ifdef DYNAMIC_SYSCALLS |
4953 | { | |
4954 | int callnum = find_syscall (pi, "execve"); | |
4955 | ||
4956 | if (callnum >= 0) | |
4957 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4958 | |
37de36c6 KB |
4959 | callnum = find_syscall (pi, "ra_execve"); |
4960 | if (callnum >= 0) | |
4961 | gdb_praddsysset (exitset, callnum); | |
4962 | } | |
4963 | #endif /* DYNAMIC_SYSCALLS */ | |
4964 | ||
4965 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4966 | { |
c3f6f71d JM |
4967 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4968 | gdb_flush (gdb_stderr); | |
4969 | _exit (127); | |
c906108c | 4970 | } |
c3f6f71d JM |
4971 | #endif /* PRFS_STOPEXEC */ |
4972 | ||
4973 | /* FIXME: should this be done in the parent instead? */ | |
4974 | /* Turn off inherit on fork flag so that all grand-children | |
4975 | of gdb start with tracing flags cleared. */ | |
4976 | if (!proc_unset_inherit_on_fork (pi)) | |
4977 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4978 | ||
4979 | /* Turn off run on last close flag, so that the child process | |
4980 | cannot run away just because we close our handle on it. | |
4981 | We want it to wait for the parent to attach. */ | |
4982 | if (!proc_unset_run_on_last_close (pi)) | |
4983 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4984 | ||
4985 | /* FIXME: No need to destroy the procinfo -- | |
4986 | we have our own address space, and we're about to do an exec! */ | |
4987 | /*destroy_procinfo (pi);*/ | |
c906108c | 4988 | } |
c906108c | 4989 | |
c3f6f71d JM |
4990 | /* |
4991 | * Function: create_inferior | |
4992 | * | |
4993 | * This function is called BEFORE gdb forks the inferior process. | |
4994 | * Its only real responsibility is to set things up for the fork, | |
4995 | * and tell GDB which two functions to call after the fork (one | |
4996 | * for the parent, and one for the child). | |
4997 | * | |
4998 | * This function does a complicated search for a unix shell program, | |
4999 | * which it then uses to parse arguments and environment variables | |
5000 | * to be sent to the child. I wonder whether this code could not | |
5001 | * be abstracted out and shared with other unix targets such as | |
5002 | * infptrace? | |
5003 | */ | |
c906108c SS |
5004 | |
5005 | static void | |
fba45db2 | 5006 | procfs_create_inferior (char *exec_file, char *allargs, char **env) |
c906108c SS |
5007 | { |
5008 | char *shell_file = getenv ("SHELL"); | |
5009 | char *tryname; | |
5010 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
5011 | { | |
5012 | ||
5013 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
5014 | just do this the normal way (via execlp, which operates by |
5015 | attempting an exec for each element of the PATH until it | |
5016 | finds one which succeeds), then there will be an exec for | |
5017 | each failed attempt, each of which will cause a PR_SYSEXIT | |
5018 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
5019 | for these failed execs with the ones for successful execs | |
5020 | (whether the exec has succeeded is stored at that time in the | |
5021 | carry bit or some such architecture-specific and | |
5022 | non-ABI-specified place). | |
5023 | ||
5024 | So I can't think of anything better than to search the PATH | |
5025 | now. This has several disadvantages: (1) There is a race | |
5026 | condition; if we find a file now and it is deleted before we | |
5027 | exec it, we lose, even if the deletion leaves a valid file | |
5028 | further down in the PATH, (2) there is no way to know exactly | |
5029 | what an executable (in the sense of "capable of being | |
5030 | exec'd") file is. Using access() loses because it may lose | |
5031 | if the caller is the superuser; failing to use it loses if | |
5032 | there are ACLs or some such. */ | |
c906108c SS |
5033 | |
5034 | char *p; | |
5035 | char *p1; | |
5036 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 5037 | path is used from within GDB. */ |
c906108c SS |
5038 | char *path = getenv ("PATH"); |
5039 | int len; | |
5040 | struct stat statbuf; | |
5041 | ||
5042 | if (path == NULL) | |
5043 | path = "/bin:/usr/bin"; | |
5044 | ||
5045 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 5046 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
5047 | { |
5048 | p1 = strchr (p, ':'); | |
5049 | if (p1 != NULL) | |
5050 | len = p1 - p; | |
5051 | else | |
5052 | len = strlen (p); | |
5053 | strncpy (tryname, p, len); | |
5054 | tryname[len] = '\0'; | |
5055 | strcat (tryname, "/"); | |
5056 | strcat (tryname, shell_file); | |
5057 | if (access (tryname, X_OK) < 0) | |
5058 | continue; | |
5059 | if (stat (tryname, &statbuf) < 0) | |
5060 | continue; | |
5061 | if (!S_ISREG (statbuf.st_mode)) | |
5062 | /* We certainly need to reject directories. I'm not quite | |
5063 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
5064 | that people want to exec() these things. */ | |
5065 | continue; | |
5066 | break; | |
5067 | } | |
5068 | if (p == NULL) | |
5069 | /* Not found. This must be an error rather than merely passing | |
5070 | the file to execlp(), because execlp() would try all the | |
5071 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
5072 | error ("procfs:%d -- Can't find shell %s in PATH", |
5073 | __LINE__, shell_file); | |
c906108c SS |
5074 | |
5075 | shell_file = tryname; | |
5076 | } | |
5077 | ||
c3f6f71d JM |
5078 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
5079 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
5080 | |
5081 | /* We are at the first instruction we care about. */ | |
5082 | /* Pedal to the metal... */ | |
5083 | ||
2acceee2 | 5084 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
5085 | } |
5086 | ||
c3f6f71d JM |
5087 | /* |
5088 | * Function: notice_thread | |
5089 | * | |
5090 | * Callback for find_new_threads. | |
5091 | * Calls "add_thread". | |
5092 | */ | |
c906108c | 5093 | |
c3f6f71d | 5094 | static int |
fba45db2 | 5095 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5096 | { |
39f77062 | 5097 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5098 | |
c3f6f71d JM |
5099 | if (!in_thread_list (gdb_threadid)) |
5100 | add_thread (gdb_threadid); | |
c906108c | 5101 | |
c3f6f71d JM |
5102 | return 0; |
5103 | } | |
5104 | ||
5105 | /* | |
5106 | * Function: target_find_new_threads | |
5107 | * | |
5108 | * Query all the threads that the target knows about, | |
5109 | * and give them back to GDB to add to its list. | |
5110 | */ | |
5111 | ||
5112 | void | |
fba45db2 | 5113 | procfs_find_new_threads (void) |
c3f6f71d JM |
5114 | { |
5115 | procinfo *pi; | |
5116 | ||
5117 | /* Find procinfo for main process */ | |
39f77062 | 5118 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5119 | proc_update_threads (pi); |
5120 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5121 | } |
5122 | ||
c3f6f71d JM |
5123 | /* |
5124 | * Function: target_thread_alive | |
5125 | * | |
5126 | * Return true if the thread is still 'alive'. | |
5127 | * | |
5128 | * This guy doesn't really seem to be doing his job. | |
5129 | * Got to investigate how to tell when a thread is really gone. | |
5130 | */ | |
c906108c | 5131 | |
c906108c | 5132 | static int |
39f77062 | 5133 | procfs_thread_alive (ptid_t ptid) |
c906108c | 5134 | { |
c3f6f71d JM |
5135 | int proc, thread; |
5136 | procinfo *pi; | |
c906108c | 5137 | |
39f77062 KB |
5138 | proc = PIDGET (ptid); |
5139 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5140 | /* If I don't know it, it ain't alive! */ |
5141 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5142 | return 0; | |
5143 | ||
5144 | /* If I can't get its status, it ain't alive! | |
5145 | What's more, I need to forget about it! */ | |
5146 | if (!proc_get_status (pi)) | |
5147 | { | |
5148 | destroy_procinfo (pi); | |
5149 | return 0; | |
5150 | } | |
5151 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5152 | return 1; | |
c906108c | 5153 | } |
c3f6f71d JM |
5154 | |
5155 | /* | |
5156 | * Function: target_pid_to_str | |
5157 | * | |
5158 | * Return a string to be used to identify the thread in | |
5159 | * the "info threads" display. | |
5160 | */ | |
5161 | ||
5162 | char * | |
39f77062 | 5163 | procfs_pid_to_str (ptid_t ptid) |
c3f6f71d JM |
5164 | { |
5165 | static char buf[80]; | |
5166 | int proc, thread; | |
5167 | procinfo *pi; | |
5168 | ||
39f77062 KB |
5169 | proc = PIDGET (ptid); |
5170 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5171 | pi = find_procinfo (proc, thread); |
5172 | ||
5173 | if (thread == 0) | |
5174 | sprintf (buf, "Process %d", proc); | |
5175 | else | |
5176 | sprintf (buf, "LWP %d", thread); | |
5177 | return &buf[0]; | |
5178 | } | |
5179 | ||
5180 | /* | |
5181 | * Function: procfs_set_watchpoint | |
5182 | * Insert a watchpoint | |
5183 | */ | |
5184 | ||
5185 | int | |
39f77062 KB |
5186 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
5187 | int after) | |
c906108c | 5188 | { |
c3f6f71d | 5189 | #ifndef UNIXWARE |
37de36c6 | 5190 | #ifndef AIX5 |
c3f6f71d JM |
5191 | int pflags = 0; |
5192 | procinfo *pi; | |
5193 | ||
39f77062 KB |
5194 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
5195 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); | |
c3f6f71d JM |
5196 | |
5197 | /* Translate from GDB's flags to /proc's */ | |
5198 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5199 | { |
c3f6f71d JM |
5200 | switch (rwflag) { /* FIXME: need an enum! */ |
5201 | case hw_write: /* default watchpoint (write) */ | |
5202 | pflags = WRITE_WATCHFLAG; | |
5203 | break; | |
5204 | case hw_read: /* read watchpoint */ | |
5205 | pflags = READ_WATCHFLAG; | |
5206 | break; | |
5207 | case hw_access: /* access watchpoint */ | |
5208 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5209 | break; | |
5210 | case hw_execute: /* execution HW breakpoint */ | |
5211 | pflags = EXEC_WATCHFLAG; | |
5212 | break; | |
5213 | default: /* Something weird. Return error. */ | |
c906108c | 5214 | return -1; |
c3f6f71d JM |
5215 | } |
5216 | if (after) /* Stop after r/w access is completed. */ | |
5217 | pflags |= AFTER_WATCHFLAG; | |
5218 | } | |
5219 | ||
5220 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5221 | { | |
5222 | if (errno == E2BIG) /* Typical error for no resources */ | |
5223 | return -1; /* fail */ | |
5224 | /* GDB may try to remove the same watchpoint twice. | |
5225 | If a remove request returns no match, don't error. */ | |
c906108c | 5226 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5227 | return 0; /* ignore */ |
5228 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5229 | } |
37de36c6 KB |
5230 | #endif /* AIX5 */ |
5231 | #endif /* UNIXWARE */ | |
c906108c SS |
5232 | return 0; |
5233 | } | |
5234 | ||
c3f6f71d JM |
5235 | /* |
5236 | * Function: stopped_by_watchpoint | |
5237 | * | |
5238 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5239 | * else returns zero. | |
5240 | */ | |
5241 | ||
c906108c | 5242 | int |
39f77062 | 5243 | procfs_stopped_by_watchpoint (ptid_t ptid) |
c906108c | 5244 | { |
c3f6f71d | 5245 | procinfo *pi; |
c906108c | 5246 | |
39f77062 KB |
5247 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
5248 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); | |
aaeb7efa MS |
5249 | |
5250 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5251 | return 0; | |
5252 | ||
c3f6f71d | 5253 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5254 | { |
c3f6f71d JM |
5255 | if (proc_why (pi) == PR_FAULTED) |
5256 | { | |
c906108c | 5257 | #ifdef FLTWATCH |
c3f6f71d JM |
5258 | if (proc_what (pi) == FLTWATCH) |
5259 | return 1; | |
c906108c SS |
5260 | #endif |
5261 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5262 | if (proc_what (pi) == FLTKWATCH) |
5263 | return 1; | |
c906108c | 5264 | #endif |
c3f6f71d | 5265 | } |
c906108c SS |
5266 | } |
5267 | return 0; | |
5268 | } | |
c906108c | 5269 | |
c3f6f71d JM |
5270 | #ifdef TM_I386SOL2_H |
5271 | /* | |
5272 | * Function: procfs_find_LDT_entry | |
5273 | * | |
5274 | * Input: | |
39f77062 | 5275 | * ptid_t ptid; // The GDB-style pid-plus-LWP. |
c3f6f71d JM |
5276 | * |
5277 | * Return: | |
5278 | * pointer to the corresponding LDT entry. | |
5279 | */ | |
c906108c | 5280 | |
c3f6f71d | 5281 | struct ssd * |
39f77062 | 5282 | procfs_find_LDT_entry (ptid_t ptid) |
c906108c | 5283 | { |
c3f6f71d JM |
5284 | gdb_gregset_t *gregs; |
5285 | int key; | |
5286 | procinfo *pi; | |
c906108c | 5287 | |
c3f6f71d | 5288 | /* Find procinfo for the lwp. */ |
39f77062 | 5289 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) |
c906108c | 5290 | { |
39f77062 KB |
5291 | warning ("procfs_find_LDT_entry: could not find procinfo for %d:%d.", |
5292 | PIDGET (ptid), TIDGET (ptid)); | |
c3f6f71d | 5293 | return NULL; |
c906108c | 5294 | } |
c3f6f71d JM |
5295 | /* get its general registers. */ |
5296 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
5297 | { | |
39f77062 KB |
5298 | warning ("procfs_find_LDT_entry: could not read gregs for %d:%d.", |
5299 | PIDGET (ptid), TIDGET (ptid)); | |
c3f6f71d JM |
5300 | return NULL; |
5301 | } | |
5302 | /* Now extract the GS register's lower 16 bits. */ | |
5303 | key = (*gregs)[GS] & 0xffff; | |
5304 | ||
5305 | /* Find the matching entry and return it. */ | |
5306 | return proc_get_LDT_entry (pi, key); | |
c906108c | 5307 | } |
c3f6f71d | 5308 | #endif /* TM_I386SOL2_H */ |
c906108c | 5309 | |
388faa48 MS |
5310 | /* |
5311 | * Function: mappingflags | |
5312 | * | |
5313 | * Returns an ascii representation of a memory mapping's flags. | |
5314 | */ | |
c3f6f71d | 5315 | |
388faa48 MS |
5316 | static char * |
5317 | mappingflags (flags) | |
5318 | long flags; | |
5319 | { | |
5320 | static char asciiflags[8]; | |
5321 | ||
5322 | strcpy (asciiflags, "-------"); | |
5323 | #if defined (MA_PHYS) | |
5324 | if (flags & MA_PHYS) | |
5325 | asciiflags[0] = 'd'; | |
5326 | #endif | |
5327 | if (flags & MA_STACK) | |
5328 | asciiflags[1] = 's'; | |
5329 | if (flags & MA_BREAK) | |
5330 | asciiflags[2] = 'b'; | |
5331 | if (flags & MA_SHARED) | |
5332 | asciiflags[3] = 's'; | |
5333 | if (flags & MA_READ) | |
5334 | asciiflags[4] = 'r'; | |
5335 | if (flags & MA_WRITE) | |
5336 | asciiflags[5] = 'w'; | |
5337 | if (flags & MA_EXEC) | |
5338 | asciiflags[6] = 'x'; | |
5339 | return (asciiflags); | |
5340 | } | |
5341 | ||
5342 | /* | |
5343 | * Function: info_proc_mappings | |
5344 | * | |
5345 | * Implement the "info proc mappings" subcommand. | |
5346 | */ | |
5347 | ||
5348 | static void | |
5349 | info_proc_mappings (procinfo *pi, int summary) | |
5350 | { | |
5351 | char *header_fmt_string, *data_fmt_string; | |
5352 | char pathname[MAX_PROC_NAME_SIZE]; | |
5353 | struct prmap *prmaps; | |
5354 | struct prmap *prmap; | |
5355 | int map_fd; | |
5356 | int nmap; | |
5357 | #ifdef NEW_PROC_API | |
5358 | struct stat sbuf; | |
5359 | #endif | |
5360 | ||
5361 | if (TARGET_PTR_BIT == 32) | |
5362 | { | |
5363 | header_fmt_string = "\t%10s %10s %10s %10s %7s\n"; | |
5364 | data_fmt_string = "\t%#10lx %#10lx %#10x %#10x %7s\n"; | |
5365 | } | |
5366 | else | |
5367 | { | |
5368 | header_fmt_string = " %18s %18s %10s %10s %7s\n"; | |
5369 | data_fmt_string = " %#18lx %#18lx %#10x %#10x %7s\n"; | |
5370 | } | |
5371 | ||
5372 | if (summary) | |
5373 | return; /* No output for summary mode. */ | |
5374 | ||
5375 | /* Get the number of mappings, allocate space, | |
5376 | and read the mappings into prmaps. */ | |
5377 | #ifdef NEW_PROC_API | |
5378 | /* Open map fd. */ | |
5379 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5380 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5381 | return; /* Can't open map file. */ | |
5382 | /* Make sure it gets closed again. */ | |
5383 | make_cleanup_close (map_fd); | |
5384 | ||
5385 | /* Use stat to determine the file size, and compute | |
5386 | the number of prmap_t objects it contains. */ | |
5387 | if (fstat (map_fd, &sbuf) != 0) | |
5388 | return; /* Can't stat file. */ | |
5389 | ||
5390 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5391 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5392 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5393 | != (nmap * sizeof (*prmaps))) | |
5394 | return; /* Can't read file. */ | |
5395 | #else | |
5396 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5397 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5398 | return; /* Can't get number of mappings. */ | |
5399 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5400 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5401 | return; /* Can't read mappings. */ | |
5402 | #endif | |
5403 | ||
5404 | printf_filtered ("Mapped address spaces:\n\n"); | |
5405 | printf_filtered (header_fmt_string, | |
5406 | "Start Addr", | |
5407 | " End Addr", | |
5408 | " Size", | |
5409 | " Offset", | |
5410 | "Flags"); | |
5411 | ||
5412 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5413 | { | |
5414 | printf_filtered (data_fmt_string, | |
5415 | (unsigned long) prmap->pr_vaddr, | |
5416 | (unsigned long) prmap->pr_vaddr | |
5417 | + prmap->pr_size - 1, | |
5418 | prmap->pr_size, | |
5419 | #ifdef PCAGENT /* Gross hack: only defined on Solaris 2.6+ */ | |
5420 | (unsigned int) prmap->pr_offset, | |
5421 | #else | |
5422 | prmap->pr_off, | |
5423 | #endif | |
5424 | mappingflags (prmap->pr_mflags)); | |
5425 | } | |
5426 | printf_filtered ("\n"); | |
5427 | } | |
5428 | ||
5429 | /* | |
5430 | * Function: info_proc_cmd | |
5431 | * | |
5432 | * Implement the "info proc" command. | |
5433 | */ | |
c3f6f71d JM |
5434 | |
5435 | static void | |
fba45db2 | 5436 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5437 | { |
c3f6f71d | 5438 | struct cleanup *old_chain; |
388faa48 MS |
5439 | procinfo *process = NULL; |
5440 | procinfo *thread = NULL; | |
5441 | char **argv = NULL; | |
5442 | char *tmp = NULL; | |
5443 | int pid = 0; | |
5444 | int tid = 0; | |
5445 | int mappings = 0; | |
c906108c | 5446 | |
c3f6f71d JM |
5447 | old_chain = make_cleanup (null_cleanup, 0); |
5448 | if (args) | |
0fda6bd2 JM |
5449 | { |
5450 | if ((argv = buildargv (args)) == NULL) | |
5451 | nomem (0); | |
5452 | else | |
004527cb | 5453 | make_cleanup_freeargv (argv); |
0fda6bd2 | 5454 | } |
c3f6f71d JM |
5455 | while (argv != NULL && *argv != NULL) |
5456 | { | |
5457 | if (isdigit (argv[0][0])) | |
5458 | { | |
5459 | pid = strtoul (argv[0], &tmp, 10); | |
5460 | if (*tmp == '/') | |
5461 | tid = strtoul (++tmp, NULL, 10); | |
5462 | } | |
5463 | else if (argv[0][0] == '/') | |
5464 | { | |
5465 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5466 | } | |
388faa48 MS |
5467 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5468 | { | |
5469 | mappings = 1; | |
5470 | } | |
c3f6f71d JM |
5471 | else |
5472 | { | |
5473 | /* [...] */ | |
5474 | } | |
5475 | argv++; | |
5476 | } | |
5477 | if (pid == 0) | |
39f77062 | 5478 | pid = PIDGET (inferior_ptid); |
c3f6f71d JM |
5479 | if (pid == 0) |
5480 | error ("No current process: you must name one."); | |
5481 | else | |
c906108c | 5482 | { |
c3f6f71d JM |
5483 | /* Have pid, will travel. |
5484 | First see if it's a process we're already debugging. */ | |
5485 | process = find_procinfo (pid, 0); | |
5486 | if (process == NULL) | |
5487 | { | |
5488 | /* No. So open a procinfo for it, but | |
5489 | remember to close it again when finished. */ | |
5490 | process = create_procinfo (pid, 0); | |
004527cb | 5491 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5492 | if (!open_procinfo_files (process, FD_CTL)) |
5493 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5494 | } | |
c906108c | 5495 | } |
c3f6f71d JM |
5496 | if (tid != 0) |
5497 | thread = create_procinfo (pid, tid); | |
5498 | ||
5499 | if (process) | |
5500 | { | |
5501 | printf_filtered ("process %d flags:\n", process->pid); | |
5502 | proc_prettyprint_flags (proc_flags (process), 1); | |
5503 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5504 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5505 | if (proc_get_nthreads (process) > 1) | |
5506 | printf_filtered ("Process has %d threads.\n", | |
5507 | proc_get_nthreads (process)); | |
5508 | } | |
5509 | if (thread) | |
5510 | { | |
5511 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5512 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5513 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5514 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5515 | } | |
5516 | ||
388faa48 MS |
5517 | if (mappings) |
5518 | { | |
5519 | info_proc_mappings (process, 0); | |
5520 | } | |
5521 | ||
c3f6f71d | 5522 | do_cleanups (old_chain); |
c906108c SS |
5523 | } |
5524 | ||
c3f6f71d | 5525 | static void |
fba45db2 | 5526 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5527 | { |
c3f6f71d JM |
5528 | procinfo *pi; |
5529 | sysset_t *sysset; | |
5530 | int syscallnum = 0; | |
c906108c | 5531 | |
39f77062 | 5532 | if (PIDGET (inferior_ptid) <= 0) |
c3f6f71d | 5533 | error ("you must be debugging a process to use this command."); |
c906108c | 5534 | |
c3f6f71d JM |
5535 | if (args == NULL || args[0] == 0) |
5536 | error_no_arg ("system call to trace"); | |
5537 | ||
39f77062 | 5538 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5539 | if (isdigit (args[0])) |
5540 | { | |
5541 | syscallnum = atoi (args); | |
5542 | if (entry_or_exit == PR_SYSENTRY) | |
5543 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5544 | else | |
5545 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5546 | |
c3f6f71d JM |
5547 | if (sysset == NULL) |
5548 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5549 | |
c3f6f71d | 5550 | if (mode == FLAG_SET) |
37de36c6 | 5551 | gdb_praddsysset (sysset, syscallnum); |
c3f6f71d | 5552 | else |
37de36c6 | 5553 | gdb_prdelsysset (sysset, syscallnum); |
c906108c | 5554 | |
c3f6f71d JM |
5555 | if (entry_or_exit == PR_SYSENTRY) |
5556 | { | |
5557 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5558 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5559 | } | |
5560 | else | |
5561 | { | |
5562 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5563 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5564 | } | |
5565 | } | |
5566 | } | |
5567 | ||
5568 | static void | |
fba45db2 | 5569 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5570 | { |
c3f6f71d JM |
5571 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5572 | } | |
c906108c | 5573 | |
c3f6f71d | 5574 | static void |
fba45db2 | 5575 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5576 | { |
5577 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5578 | } |
c906108c | 5579 | |
c3f6f71d | 5580 | static void |
fba45db2 | 5581 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5582 | { |
5583 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5584 | } | |
5585 | ||
5586 | static void | |
fba45db2 | 5587 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5588 | { |
c3f6f71d JM |
5589 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5590 | } | |
c906108c | 5591 | |
c906108c | 5592 | |
c906108c | 5593 | void |
fba45db2 | 5594 | _initialize_procfs (void) |
c906108c | 5595 | { |
c906108c SS |
5596 | init_procfs_ops (); |
5597 | add_target (&procfs_ops); | |
c3f6f71d | 5598 | add_info ("proc", info_proc_cmd, |
388faa48 MS |
5599 | "Show /proc process information about any running process.\n\ |
5600 | Specify process id, or use the program being debugged by default.\n\ | |
5601 | Specify keyword 'mappings' for detailed info on memory mappings."); | |
c3f6f71d JM |
5602 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
5603 | "Give a trace of entries into the syscall."); | |
5604 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5605 | "Give a trace of exits from the syscall."); | |
5606 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5607 | "Cancel a trace of entries into the syscall."); | |
5608 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5609 | "Cancel a trace of exits from the syscall."); | |
c3f6f71d JM |
5610 | } |
5611 | ||
5612 | /* =================== END, GDB "MODULE" =================== */ | |
5613 | ||
5614 | ||
5615 | ||
5616 | /* miscelaneous stubs: */ | |
5617 | /* The following satisfy a few random symbols mostly created by */ | |
5618 | /* the solaris threads implementation, which I will chase down */ | |
5619 | /* later. */ | |
5620 | ||
5621 | /* | |
5622 | * Return a pid for which we guarantee | |
5623 | * we will be able to find a 'live' procinfo. | |
5624 | */ | |
5625 | ||
39f77062 | 5626 | ptid_t |
fba45db2 | 5627 | procfs_first_available (void) |
c3f6f71d | 5628 | { |
39f77062 | 5629 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5630 | } |