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