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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); | |
109 | static void procfs_resume (int, int, enum target_signal); | |
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); | |
115 | static void procfs_notice_signals (int); | |
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 **); | |
120 | static int procfs_wait (int, 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 KB |
124 | |
125 | static int procfs_thread_alive (int); | |
126 | ||
127 | void procfs_find_new_threads (void); | |
128 | char *procfs_pid_to_str (int); | |
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 | |
37de36c6 | 318 | |
0d06e24b JM |
319 | /* Provide default composite pid manipulation macros for systems that |
320 | don't have threads. */ | |
c906108c | 321 | |
c3f6f71d | 322 | #ifndef PIDGET |
0d06e24b JM |
323 | #define PIDGET(PID) (PID) |
324 | #define TIDGET(PID) (PID) | |
eeefac92 AC |
325 | #endif |
326 | #ifndef MERGEPID | |
0d06e24b | 327 | #define MERGEPID(PID, TID) (PID) |
c906108c SS |
328 | #endif |
329 | ||
c3f6f71d JM |
330 | typedef struct procinfo { |
331 | struct procinfo *next; | |
332 | int pid; /* Process ID */ | |
333 | int tid; /* Thread/LWP id */ | |
c906108c | 334 | |
c3f6f71d JM |
335 | /* process state */ |
336 | int was_stopped; | |
337 | int ignore_next_sigstop; | |
c906108c | 338 | |
c3f6f71d JM |
339 | /* The following four fd fields may be identical, or may contain |
340 | several different fd's, depending on the version of /proc | |
341 | (old ioctl or new read/write). */ | |
c906108c | 342 | |
c3f6f71d JM |
343 | int ctl_fd; /* File descriptor for /proc control file */ |
344 | /* | |
345 | * The next three file descriptors are actually only needed in the | |
346 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
347 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
348 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
349 | * implementation) filling them with copies of the control fd. | |
350 | */ | |
351 | int status_fd; /* File descriptor for /proc status file */ | |
352 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 353 | |
c3f6f71d | 354 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 355 | |
c3f6f71d | 356 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
357 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
358 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
359 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
360 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 361 | |
c3f6f71d | 362 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 363 | |
c3f6f71d JM |
364 | #ifndef NEW_PROC_API |
365 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 366 | #endif |
37de36c6 KB |
367 | |
368 | #ifdef DYNAMIC_SYSCALLS | |
369 | int num_syscalls; /* Total number of syscalls */ | |
370 | char **syscall_names; /* Syscall number to name map */ | |
371 | #endif | |
c3f6f71d JM |
372 | |
373 | struct procinfo *thread_list; | |
c906108c | 374 | |
c3f6f71d JM |
375 | int status_valid : 1; |
376 | int gregs_valid : 1; | |
377 | int fpregs_valid : 1; | |
378 | int threads_valid: 1; | |
379 | } procinfo; | |
c906108c | 380 | |
c3f6f71d | 381 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 382 | |
c3f6f71d | 383 | /* Function prototypes for procinfo module: */ |
c906108c | 384 | |
a14ed312 KB |
385 | static procinfo *find_procinfo_or_die (int pid, int tid); |
386 | static procinfo *find_procinfo (int pid, int tid); | |
387 | static procinfo *create_procinfo (int pid, int tid); | |
388 | static void destroy_procinfo (procinfo * p); | |
004527cb | 389 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
390 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
391 | static int open_procinfo_files (procinfo * p, int which); | |
392 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
393 | static int sysset_t_size (procinfo *p); |
394 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
395 | #ifdef DYNAMIC_SYSCALLS | |
396 | static void load_syscalls (procinfo *pi); | |
397 | static void free_syscalls (procinfo *pi); | |
398 | static int find_syscall (procinfo *pi, char *name); | |
399 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 400 | |
c3f6f71d JM |
401 | /* The head of the procinfo list: */ |
402 | static procinfo * procinfo_list; | |
c906108c | 403 | |
c3f6f71d JM |
404 | /* |
405 | * Function: find_procinfo | |
406 | * | |
407 | * Search the procinfo list. | |
408 | * | |
409 | * Returns: pointer to procinfo, or NULL if not found. | |
410 | */ | |
c906108c | 411 | |
c3f6f71d | 412 | static procinfo * |
fba45db2 | 413 | find_procinfo (int pid, int tid) |
c5aa993b | 414 | { |
c3f6f71d | 415 | procinfo *pi; |
c906108c | 416 | |
c3f6f71d JM |
417 | for (pi = procinfo_list; pi; pi = pi->next) |
418 | if (pi->pid == pid) | |
419 | break; | |
c906108c | 420 | |
c3f6f71d JM |
421 | if (pi) |
422 | if (tid) | |
423 | { | |
424 | /* Don't check threads_valid. If we're updating the | |
425 | thread_list, we want to find whatever threads are already | |
426 | here. This means that in general it is the caller's | |
427 | responsibility to check threads_valid and update before | |
428 | calling find_procinfo, if the caller wants to find a new | |
429 | thread. */ | |
430 | ||
431 | for (pi = pi->thread_list; pi; pi = pi->next) | |
432 | if (pi->tid == tid) | |
433 | break; | |
434 | } | |
c906108c | 435 | |
c3f6f71d JM |
436 | return pi; |
437 | } | |
c906108c | 438 | |
c3f6f71d JM |
439 | /* |
440 | * Function: find_procinfo_or_die | |
441 | * | |
442 | * Calls find_procinfo, but errors on failure. | |
443 | */ | |
c906108c | 444 | |
c3f6f71d | 445 | static procinfo * |
fba45db2 | 446 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
447 | { |
448 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 449 | |
c3f6f71d | 450 | if (pi == NULL) |
0fda6bd2 JM |
451 | { |
452 | if (tid) | |
453 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
454 | pid, tid); | |
455 | else | |
456 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
457 | } | |
c3f6f71d JM |
458 | return pi; |
459 | } | |
c906108c | 460 | |
4d1bcd09 KB |
461 | /* open_with_retry() is a wrapper for open(). The appropriate |
462 | open() call is attempted; if unsuccessful, it will be retried as | |
463 | many times as needed for the EAGAIN and EINTR conditions. | |
464 | ||
465 | For other conditions, open_with_retry() will retry the open() a | |
466 | limited number of times. In addition, a short sleep is imposed | |
467 | prior to retrying the open(). The reason for this sleep is to give | |
468 | the kernel a chance to catch up and create the file in question in | |
469 | the event that GDB "wins" the race to open a file before the kernel | |
470 | has created it. */ | |
471 | ||
472 | static int | |
473 | open_with_retry (const char *pathname, int flags) | |
474 | { | |
475 | int retries_remaining, status; | |
476 | ||
477 | retries_remaining = 2; | |
478 | ||
479 | while (1) | |
480 | { | |
481 | status = open (pathname, flags); | |
482 | ||
483 | if (status >= 0 || retries_remaining == 0) | |
484 | break; | |
485 | else if (errno != EINTR && errno != EAGAIN) | |
486 | { | |
487 | retries_remaining--; | |
488 | sleep (1); | |
489 | } | |
490 | } | |
491 | ||
492 | return status; | |
493 | } | |
494 | ||
c3f6f71d JM |
495 | /* |
496 | * Function: open_procinfo_files | |
497 | * | |
498 | * Open the file descriptor for the process or LWP. | |
499 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
500 | * the others are opened lazily as needed. | |
501 | * else (if not NEW_PROC_API), there is only one real | |
502 | * file descriptor, but we keep multiple copies of it so that | |
503 | * the code that uses them does not have to be #ifdef'd. | |
504 | * | |
505 | * Return: file descriptor, or zero for failure. | |
506 | */ | |
c906108c | 507 | |
c3f6f71d | 508 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 509 | |
c3f6f71d | 510 | static int |
fba45db2 | 511 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 512 | { |
0fda6bd2 | 513 | #ifdef NEW_PROC_API |
c3f6f71d | 514 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 515 | #endif |
c3f6f71d JM |
516 | int fd; |
517 | ||
518 | /* | |
519 | * This function is getting ALMOST long enough to break up into several. | |
520 | * Here is some rationale: | |
521 | * | |
522 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
523 | * There are several file descriptors that may need to be open | |
524 | * for any given process or LWP. The ones we're intereted in are: | |
525 | * - control (ctl) write-only change the state | |
526 | * - status (status) read-only query the state | |
527 | * - address space (as) read/write access memory | |
528 | * - map (map) read-only virtual addr map | |
529 | * Most of these are opened lazily as they are needed. | |
530 | * The pathnames for the 'files' for an LWP look slightly | |
531 | * different from those of a first-class process: | |
532 | * Pathnames for a process (<proc-id>): | |
533 | * /proc/<proc-id>/ctl | |
534 | * /proc/<proc-id>/status | |
535 | * /proc/<proc-id>/as | |
536 | * /proc/<proc-id>/map | |
537 | * Pathnames for an LWP (lwp-id): | |
538 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
539 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
540 | * An LWP has no map or address space file descriptor, since | |
541 | * the memory map and address space are shared by all LWPs. | |
542 | * | |
543 | * Everyone else (Solaris 2.5, Irix, OSF) | |
544 | * There is only one file descriptor for each process or LWP. | |
545 | * For convenience, we copy the same file descriptor into all | |
546 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
547 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
548 | * doesn't need any #ifdef's. | |
549 | * Pathname for all: | |
550 | * /proc/<proc-id> | |
551 | * | |
552 | * Solaris 2.5 LWP's: | |
553 | * Each LWP has an independent file descriptor, but these | |
554 | * are not obtained via the 'open' system call like the rest: | |
555 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
556 | * to the file descriptor of the parent process. | |
557 | * | |
558 | * OSF threads: | |
559 | * These do not even have their own independent file descriptor. | |
560 | * All operations are carried out on the file descriptor of the | |
561 | * parent process. Therefore we just call open again for each | |
562 | * thread, getting a new handle for the same 'file'. | |
563 | */ | |
564 | ||
565 | #ifdef NEW_PROC_API | |
566 | /* | |
567 | * In this case, there are several different file descriptors that | |
568 | * we might be asked to open. The control file descriptor will be | |
569 | * opened early, but the others will be opened lazily as they are | |
570 | * needed. | |
571 | */ | |
572 | ||
573 | strcpy (tmp, pi->pathname); | |
574 | switch (which) { /* which file descriptor to open? */ | |
575 | case FD_CTL: | |
576 | if (pi->tid) | |
577 | strcat (tmp, "/lwpctl"); | |
578 | else | |
579 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 580 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
581 | if (fd <= 0) |
582 | return 0; /* fail */ | |
583 | pi->ctl_fd = fd; | |
584 | break; | |
585 | case FD_AS: | |
586 | if (pi->tid) | |
587 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
588 | strcat (tmp, "/as"); | |
4d1bcd09 | 589 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
590 | if (fd <= 0) |
591 | return 0; /* fail */ | |
592 | pi->as_fd = fd; | |
593 | break; | |
594 | case FD_STATUS: | |
595 | if (pi->tid) | |
596 | strcat (tmp, "/lwpstatus"); | |
597 | else | |
598 | strcat (tmp, "/status"); | |
4d1bcd09 | 599 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
600 | if (fd <= 0) |
601 | return 0; /* fail */ | |
602 | pi->status_fd = fd; | |
603 | break; | |
604 | default: | |
605 | return 0; /* unknown file descriptor */ | |
606 | } | |
607 | #else /* not NEW_PROC_API */ | |
608 | /* | |
609 | * In this case, there is only one file descriptor for each procinfo | |
610 | * (ie. each process or LWP). In fact, only the file descriptor for | |
611 | * the process can actually be opened by an 'open' system call. | |
612 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
613 | * on the process's file descriptor. | |
614 | * | |
615 | * For convenience, we copy each procinfo's single file descriptor | |
616 | * into all of the fields occupied by the several file descriptors | |
617 | * of the NEW_PROC_API implementation. That way, the code that uses | |
618 | * them can be written without ifdefs. | |
619 | */ | |
620 | ||
621 | ||
622 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
623 | /* Only one FD; just open it. */ |
624 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
625 | return 0; |
626 | #else /* Sol 2.5, Irix, other? */ | |
627 | if (pi->tid == 0) /* Master procinfo for the process */ | |
628 | { | |
4d1bcd09 | 629 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
630 | if (fd <= 0) |
631 | return 0; /* fail */ | |
632 | } | |
633 | else /* LWP thread procinfo */ | |
634 | { | |
635 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
636 | procinfo *process; | |
637 | int lwpid = pi->tid; | |
638 | ||
639 | /* Find the procinfo for the entire process. */ | |
640 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
641 | return 0; /* fail */ | |
642 | ||
643 | /* Now obtain the file descriptor for the LWP. */ | |
644 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
645 | return 0; /* fail */ | |
646 | #else /* Irix, other? */ | |
647 | return 0; /* Don't know how to open threads */ | |
648 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
649 | } | |
650 | #endif /* OSF PIOCTSTATUS */ | |
651 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
652 | #endif /* NEW_PROC_API */ | |
c906108c | 653 | |
c3f6f71d JM |
654 | return 1; /* success */ |
655 | } | |
c906108c | 656 | |
c3f6f71d JM |
657 | /* |
658 | * Function: create_procinfo | |
659 | * | |
660 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 661 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
662 | * |
663 | * Return: pointer to new procinfo struct. | |
664 | */ | |
c906108c | 665 | |
c3f6f71d | 666 | static procinfo * |
fba45db2 | 667 | create_procinfo (int pid, int tid) |
c3f6f71d JM |
668 | { |
669 | procinfo *pi, *parent; | |
c906108c | 670 | |
0d06e24b | 671 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 672 | return pi; /* Already exists, nothing to do. */ |
c906108c | 673 | |
c3f6f71d JM |
674 | /* find parent before doing malloc, to save having to cleanup */ |
675 | if (tid != 0) | |
676 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
677 | create it if it | |
678 | doesn't exist yet? */ | |
c906108c | 679 | |
c3f6f71d JM |
680 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
681 | memset (pi, 0, sizeof (procinfo)); | |
682 | pi->pid = pid; | |
683 | pi->tid = tid; | |
c906108c | 684 | |
37de36c6 KB |
685 | #ifdef DYNAMIC_SYSCALLS |
686 | load_syscalls (pi); | |
687 | #endif | |
688 | ||
c3f6f71d JM |
689 | /* Chain into list. */ |
690 | if (tid == 0) | |
691 | { | |
692 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
693 | pi->next = procinfo_list; | |
694 | procinfo_list = pi; | |
695 | } | |
696 | else | |
697 | { | |
698 | #ifdef NEW_PROC_API | |
699 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
700 | #else | |
701 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
702 | #endif | |
703 | pi->next = parent->thread_list; | |
704 | parent->thread_list = pi; | |
705 | } | |
706 | return pi; | |
707 | } | |
c906108c | 708 | |
c3f6f71d JM |
709 | /* |
710 | * Function: close_procinfo_files | |
711 | * | |
712 | * Close all file descriptors associated with the procinfo | |
713 | */ | |
c906108c | 714 | |
c3f6f71d | 715 | static void |
fba45db2 | 716 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
717 | { |
718 | if (pi->ctl_fd > 0) | |
719 | close (pi->ctl_fd); | |
720 | #ifdef NEW_PROC_API | |
721 | if (pi->as_fd > 0) | |
722 | close (pi->as_fd); | |
723 | if (pi->status_fd > 0) | |
724 | close (pi->status_fd); | |
725 | #endif | |
726 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
727 | } | |
c906108c | 728 | |
c3f6f71d JM |
729 | /* |
730 | * Function: destroy_procinfo | |
731 | * | |
732 | * Destructor function. Close, unlink and deallocate the object. | |
733 | */ | |
c906108c | 734 | |
c3f6f71d | 735 | static void |
fba45db2 | 736 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
737 | { |
738 | procinfo *ptr; | |
739 | ||
740 | /* Step one: unlink the procinfo from its list */ | |
741 | if (pi == *list) | |
742 | *list = pi->next; | |
743 | else | |
744 | for (ptr = *list; ptr; ptr = ptr->next) | |
745 | if (ptr->next == pi) | |
746 | { | |
747 | ptr->next = pi->next; | |
748 | break; | |
749 | } | |
7a292a7a | 750 | |
c3f6f71d JM |
751 | /* Step two: close any open file descriptors */ |
752 | close_procinfo_files (pi); | |
7a292a7a | 753 | |
c3f6f71d | 754 | /* Step three: free the memory. */ |
37de36c6 KB |
755 | #ifdef DYNAMIC_SYSCALLS |
756 | free_syscalls (pi); | |
757 | #endif | |
b8c9b27d | 758 | xfree (pi); |
c3f6f71d | 759 | } |
c906108c | 760 | |
c3f6f71d | 761 | static void |
fba45db2 | 762 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
763 | { |
764 | procinfo *tmp; | |
c906108c | 765 | |
c3f6f71d JM |
766 | if (pi->tid != 0) /* destroy a thread procinfo */ |
767 | { | |
768 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
769 | destroy_one_procinfo (&tmp->thread_list, pi); | |
770 | } | |
771 | else /* destroy a process procinfo and all its threads */ | |
772 | { | |
773 | /* First destroy the children, if any; */ | |
774 | while (pi->thread_list != NULL) | |
775 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
776 | /* Then destroy the parent. Genocide!!! */ | |
777 | destroy_one_procinfo (&procinfo_list, pi); | |
778 | } | |
779 | } | |
c906108c | 780 | |
004527cb AC |
781 | static void |
782 | do_destroy_procinfo_cleanup (void *pi) | |
783 | { | |
784 | destroy_procinfo (pi); | |
785 | } | |
786 | ||
c3f6f71d | 787 | enum { NOKILL, KILL }; |
c906108c | 788 | |
c3f6f71d JM |
789 | /* |
790 | * Function: dead_procinfo | |
791 | * | |
792 | * To be called on a non_recoverable error for a procinfo. | |
793 | * Prints error messages, optionally sends a SIGKILL to the process, | |
794 | * then destroys the data structure. | |
795 | */ | |
c906108c | 796 | |
c3f6f71d | 797 | static void |
fba45db2 | 798 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
799 | { |
800 | char procfile[80]; | |
c906108c | 801 | |
c3f6f71d JM |
802 | if (pi->pathname) |
803 | { | |
804 | print_sys_errmsg (pi->pathname, errno); | |
805 | } | |
806 | else | |
807 | { | |
808 | sprintf (procfile, "process %d", pi->pid); | |
809 | print_sys_errmsg (procfile, errno); | |
810 | } | |
811 | if (kill_p == KILL) | |
812 | kill (pi->pid, SIGKILL); | |
c906108c | 813 | |
c3f6f71d JM |
814 | destroy_procinfo (pi); |
815 | error (msg); | |
816 | } | |
c906108c | 817 | |
37de36c6 KB |
818 | /* |
819 | * Function: sysset_t_size | |
820 | * | |
821 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
822 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
823 | * size of sysset_t isn't known until runtime. | |
824 | */ | |
825 | ||
826 | static int | |
827 | sysset_t_size (procinfo * pi) | |
828 | { | |
829 | #ifndef DYNAMIC_SYSCALLS | |
830 | return sizeof (sysset_t); | |
831 | #else | |
832 | return sizeof (sysset_t) - sizeof (uint64_t) | |
833 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
834 | / (8 * sizeof (uint64_t))); | |
835 | #endif | |
836 | } | |
837 | ||
838 | /* Function: sysset_t_alloc | |
839 | ||
840 | Allocate and (partially) initialize a sysset_t struct. */ | |
841 | ||
842 | static sysset_t * | |
843 | sysset_t_alloc (procinfo * pi) | |
844 | { | |
845 | sysset_t *ret; | |
846 | int size = sysset_t_size (pi); | |
847 | ret = xmalloc (size); | |
848 | #ifdef DYNAMIC_SYSCALLS | |
849 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
850 | / (8 * sizeof (uint64_t)); | |
851 | #endif | |
852 | return ret; | |
853 | } | |
854 | ||
855 | #ifdef DYNAMIC_SYSCALLS | |
856 | ||
857 | /* Function: load_syscalls | |
858 | ||
859 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize | |
860 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
861 | with the names. (Certain numbers may be skipped in which case the | |
862 | names for these numbers will be left as NULL.) */ | |
863 | ||
864 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
865 | #define MAX_SYSCALLS 65536 | |
866 | ||
867 | static void | |
868 | load_syscalls (procinfo *pi) | |
869 | { | |
870 | char pathname[MAX_PROC_NAME_SIZE]; | |
871 | int sysent_fd; | |
872 | prsysent_t header; | |
873 | prsyscall_t *syscalls; | |
874 | int i, size, maxcall; | |
875 | ||
876 | pi->num_syscalls = 0; | |
877 | pi->syscall_names = 0; | |
878 | ||
879 | /* Open the file descriptor for the sysent file */ | |
880 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 881 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
882 | if (sysent_fd < 0) |
883 | { | |
884 | error ("load_syscalls: Can't open /proc/%d/sysent", pi->pid); | |
885 | } | |
886 | ||
887 | size = sizeof header - sizeof (prsyscall_t); | |
888 | if (read (sysent_fd, &header, size) != size) | |
889 | { | |
890 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
891 | } | |
892 | ||
893 | if (header.pr_nsyscalls == 0) | |
894 | { | |
895 | error ("load_syscalls: /proc/%d/sysent contains no syscalls!", pi->pid); | |
896 | } | |
897 | ||
898 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
899 | syscalls = xmalloc (size); | |
900 | ||
901 | if (read (sysent_fd, syscalls, size) != size) | |
902 | { | |
903 | xfree (syscalls); | |
904 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
905 | } | |
906 | ||
907 | /* Find maximum syscall number. This may not be the same as | |
908 | pr_nsyscalls since that value refers to the number of entries | |
909 | in the table. (Also, the docs indicate that some system | |
910 | call numbers may be skipped.) */ | |
911 | ||
912 | maxcall = syscalls[0].pr_number; | |
913 | ||
914 | for (i = 1; i < header.pr_nsyscalls; i++) | |
915 | if (syscalls[i].pr_number > maxcall | |
916 | && syscalls[i].pr_nameoff > 0 | |
917 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
918 | maxcall = syscalls[i].pr_number; | |
919 | ||
920 | pi->num_syscalls = maxcall+1; | |
921 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
922 | ||
923 | for (i = 0; i < pi->num_syscalls; i++) | |
924 | pi->syscall_names[i] = NULL; | |
925 | ||
926 | /* Read the syscall names in */ | |
927 | for (i = 0; i < header.pr_nsyscalls; i++) | |
928 | { | |
929 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
930 | int nread; | |
931 | int callnum; | |
932 | ||
933 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
934 | || syscalls[i].pr_number < 0 | |
935 | || syscalls[i].pr_nameoff <= 0 | |
936 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
937 | != (off_t) syscalls[i].pr_nameoff)) | |
938 | continue; | |
939 | ||
940 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
941 | if (nread <= 0) | |
942 | continue; | |
943 | ||
944 | callnum = syscalls[i].pr_number; | |
945 | ||
946 | if (pi->syscall_names[callnum] != NULL) | |
947 | { | |
948 | /* FIXME: Generate warning */ | |
949 | continue; | |
950 | } | |
951 | ||
952 | namebuf[nread-1] = '\0'; | |
953 | size = strlen (namebuf) + 1; | |
954 | pi->syscall_names[callnum] = xmalloc (size); | |
955 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
956 | pi->syscall_names[callnum][size-1] = '\0'; | |
957 | } | |
958 | ||
959 | close (sysent_fd); | |
960 | xfree (syscalls); | |
961 | } | |
962 | ||
963 | /* Function: free_syscalls | |
964 | ||
965 | Free the space allocated for the syscall names from the procinfo | |
966 | structure. */ | |
967 | ||
968 | static void | |
969 | free_syscalls (procinfo *pi) | |
970 | { | |
971 | if (pi->syscall_names) | |
972 | { | |
973 | int i; | |
974 | ||
975 | for (i = 0; i < pi->num_syscalls; i++) | |
976 | if (pi->syscall_names[i] != NULL) | |
977 | xfree (pi->syscall_names[i]); | |
978 | ||
979 | xfree (pi->syscall_names); | |
980 | pi->syscall_names = 0; | |
981 | } | |
982 | } | |
983 | ||
984 | /* Function: find_syscall | |
985 | ||
986 | Given a name, look up (and return) the corresponding syscall number. | |
987 | If no match is found, return -1. */ | |
988 | ||
989 | static int | |
990 | find_syscall (procinfo *pi, char *name) | |
991 | { | |
992 | int i; | |
993 | for (i = 0; i < pi->num_syscalls; i++) | |
994 | { | |
995 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
996 | return i; | |
997 | } | |
998 | return -1; | |
999 | } | |
1000 | #endif | |
1001 | ||
c3f6f71d | 1002 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1003 | |
c3f6f71d | 1004 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1005 | |
c3f6f71d JM |
1006 | /* |
1007 | * This "module" is the interface layer between the /proc system API | |
1008 | * and the gdb target vector functions. This layer consists of | |
1009 | * access functions that encapsulate each of the basic operations | |
1010 | * that we need to use from the /proc API. | |
1011 | * | |
1012 | * The main motivation for this layer is to hide the fact that | |
1013 | * there are two very different implementations of the /proc API. | |
1014 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1015 | * functions, we do our best to hide them all in here. | |
1016 | */ | |
c906108c | 1017 | |
a14ed312 KB |
1018 | int proc_get_status (procinfo * pi); |
1019 | long proc_flags (procinfo * pi); | |
1020 | int proc_why (procinfo * pi); | |
1021 | int proc_what (procinfo * pi); | |
1022 | int proc_set_run_on_last_close (procinfo * pi); | |
1023 | int proc_unset_run_on_last_close (procinfo * pi); | |
1024 | int proc_set_inherit_on_fork (procinfo * pi); | |
1025 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1026 | int proc_set_async (procinfo * pi); | |
1027 | int proc_unset_async (procinfo * pi); | |
1028 | int proc_stop_process (procinfo * pi); | |
1029 | int proc_trace_signal (procinfo * pi, int signo); | |
1030 | int proc_ignore_signal (procinfo * pi, int signo); | |
1031 | int proc_clear_current_fault (procinfo * pi); | |
1032 | int proc_set_current_signal (procinfo * pi, int signo); | |
1033 | int proc_clear_current_signal (procinfo * pi); | |
1034 | int proc_set_gregs (procinfo * pi); | |
1035 | int proc_set_fpregs (procinfo * pi); | |
1036 | int proc_wait_for_stop (procinfo * pi); | |
1037 | int proc_run_process (procinfo * pi, int step, int signo); | |
1038 | int proc_kill (procinfo * pi, int signo); | |
1039 | int proc_parent_pid (procinfo * pi); | |
1040 | int proc_get_nthreads (procinfo * pi); | |
1041 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1042 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1043 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1044 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1045 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1046 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1047 | |
1048 | int proc_update_threads (procinfo * pi); | |
1049 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1050 | int (*func) (procinfo *, procinfo *, void *), |
1051 | void *ptr); | |
a14ed312 KB |
1052 | |
1053 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1054 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1055 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1056 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1057 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1058 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1059 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1060 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1061 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1062 | |
1063 | void proc_warn (procinfo * pi, char *func, int line); | |
1064 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1065 | |
c3f6f71d | 1066 | void |
fba45db2 | 1067 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1068 | { |
1069 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1070 | print_sys_errmsg (errmsg, errno); | |
1071 | } | |
c906108c | 1072 | |
c3f6f71d | 1073 | void |
fba45db2 | 1074 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1075 | { |
1076 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1077 | perror_with_name (errmsg); | |
1078 | } | |
c906108c | 1079 | |
c3f6f71d JM |
1080 | /* |
1081 | * Function: proc_get_status | |
1082 | * | |
1083 | * Updates the status struct in the procinfo. | |
1084 | * There is a 'valid' flag, to let other functions know when | |
1085 | * this function needs to be called (so the status is only | |
1086 | * read when it is needed). The status file descriptor is | |
1087 | * also only opened when it is needed. | |
1088 | * | |
1089 | * Return: non-zero for success, zero for failure. | |
1090 | */ | |
c906108c | 1091 | |
c3f6f71d | 1092 | int |
fba45db2 | 1093 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1094 | { |
1095 | /* Status file descriptor is opened "lazily" */ | |
1096 | if (pi->status_fd == 0 && | |
1097 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1098 | { | |
1099 | pi->status_valid = 0; | |
1100 | return 0; | |
1101 | } | |
c906108c | 1102 | |
c3f6f71d JM |
1103 | #ifdef NEW_PROC_API |
1104 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1105 | pi->status_valid = 0; /* fail */ | |
1106 | else | |
1107 | { | |
1108 | /* Sigh... I have to read a different data structure, | |
1109 | depending on whether this is a main process or an LWP. */ | |
1110 | if (pi->tid) | |
1111 | pi->status_valid = (read (pi->status_fd, | |
1112 | (char *) &pi->prstatus.pr_lwp, | |
1113 | sizeof (lwpstatus_t)) | |
1114 | == sizeof (lwpstatus_t)); | |
1115 | else | |
1116 | { | |
1117 | pi->status_valid = (read (pi->status_fd, | |
1118 | (char *) &pi->prstatus, | |
1119 | sizeof (gdb_prstatus_t)) | |
1120 | == sizeof (gdb_prstatus_t)); | |
1121 | #if 0 /*def UNIXWARE*/ | |
1122 | if (pi->status_valid && | |
1123 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1124 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1125 | /* Unixware peculiarity -- read the damn thing again! */ | |
1126 | pi->status_valid = (read (pi->status_fd, | |
1127 | (char *) &pi->prstatus, | |
1128 | sizeof (gdb_prstatus_t)) | |
1129 | == sizeof (gdb_prstatus_t)); | |
1130 | #endif /* UNIXWARE */ | |
1131 | } | |
1132 | } | |
1133 | #else /* ioctl method */ | |
1134 | #ifdef PIOCTSTATUS /* osf */ | |
1135 | if (pi->tid == 0) /* main process */ | |
1136 | { | |
1137 | /* Just read the danged status. Now isn't that simple? */ | |
1138 | pi->status_valid = | |
1139 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1140 | } | |
1141 | else | |
1142 | { | |
1143 | int win; | |
1144 | struct { | |
1145 | long pr_count; | |
1146 | tid_t pr_error_thread; | |
1147 | struct prstatus status; | |
1148 | } thread_status; | |
1149 | ||
1150 | thread_status.pr_count = 1; | |
1151 | thread_status.status.pr_tid = pi->tid; | |
1152 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1153 | if (win) | |
1154 | { | |
1155 | memcpy (&pi->prstatus, &thread_status.status, | |
1156 | sizeof (pi->prstatus)); | |
1157 | pi->status_valid = 1; | |
1158 | } | |
1159 | } | |
1160 | #else | |
1161 | /* Just read the danged status. Now isn't that simple? */ | |
1162 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1163 | #endif | |
1164 | #endif | |
c906108c | 1165 | |
c3f6f71d JM |
1166 | if (pi->status_valid) |
1167 | { | |
1168 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1169 | proc_why (pi), | |
1170 | proc_what (pi), | |
1171 | proc_get_current_thread (pi)); | |
1172 | } | |
c906108c | 1173 | |
c3f6f71d JM |
1174 | /* The status struct includes general regs, so mark them valid too */ |
1175 | pi->gregs_valid = pi->status_valid; | |
1176 | #ifdef NEW_PROC_API | |
1177 | /* In the read/write multiple-fd model, | |
1178 | the status struct includes the fp regs too, so mark them valid too */ | |
1179 | pi->fpregs_valid = pi->status_valid; | |
1180 | #endif | |
1181 | return pi->status_valid; /* True if success, false if failure. */ | |
1182 | } | |
c906108c | 1183 | |
c3f6f71d JM |
1184 | /* |
1185 | * Function: proc_flags | |
1186 | * | |
1187 | * returns the process flags (pr_flags field). | |
1188 | */ | |
1189 | ||
1190 | long | |
fba45db2 | 1191 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1192 | { |
1193 | if (!pi->status_valid) | |
1194 | if (!proc_get_status (pi)) | |
1195 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1196 | |
c3f6f71d | 1197 | #ifdef NEW_PROC_API |
0d06e24b JM |
1198 | # ifdef UNIXWARE |
1199 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1200 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1201 | The two sets of flags don't overlap. */ | |
1202 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1203 | # else | |
c3f6f71d | 1204 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1205 | # endif |
c3f6f71d JM |
1206 | #else |
1207 | return pi->prstatus.pr_flags; | |
1208 | #endif | |
1209 | } | |
c906108c | 1210 | |
c3f6f71d JM |
1211 | /* |
1212 | * Function: proc_why | |
1213 | * | |
1214 | * returns the pr_why field (why the process stopped). | |
1215 | */ | |
c906108c | 1216 | |
c3f6f71d | 1217 | int |
fba45db2 | 1218 | proc_why (procinfo *pi) |
c3f6f71d JM |
1219 | { |
1220 | if (!pi->status_valid) | |
1221 | if (!proc_get_status (pi)) | |
1222 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1223 | |
c3f6f71d JM |
1224 | #ifdef NEW_PROC_API |
1225 | return pi->prstatus.pr_lwp.pr_why; | |
1226 | #else | |
1227 | return pi->prstatus.pr_why; | |
1228 | #endif | |
1229 | } | |
c906108c | 1230 | |
c3f6f71d JM |
1231 | /* |
1232 | * Function: proc_what | |
1233 | * | |
1234 | * returns the pr_what field (details of why the process stopped). | |
1235 | */ | |
c906108c | 1236 | |
c3f6f71d | 1237 | int |
fba45db2 | 1238 | proc_what (procinfo *pi) |
c3f6f71d JM |
1239 | { |
1240 | if (!pi->status_valid) | |
1241 | if (!proc_get_status (pi)) | |
1242 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1243 | |
c3f6f71d JM |
1244 | #ifdef NEW_PROC_API |
1245 | return pi->prstatus.pr_lwp.pr_what; | |
1246 | #else | |
1247 | return pi->prstatus.pr_what; | |
c906108c | 1248 | #endif |
c3f6f71d | 1249 | } |
c906108c | 1250 | |
c3f6f71d JM |
1251 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1252 | /* | |
1253 | * Function: proc_nsysarg | |
1254 | * | |
1255 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1256 | */ | |
1257 | ||
1258 | int | |
fba45db2 | 1259 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1260 | { |
1261 | if (!pi->status_valid) | |
1262 | if (!proc_get_status (pi)) | |
1263 | return 0; | |
1264 | ||
1265 | #ifdef NEW_PROC_API | |
1266 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1267 | #else | |
1268 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1269 | #endif |
c3f6f71d | 1270 | } |
c906108c | 1271 | |
c3f6f71d JM |
1272 | /* |
1273 | * Function: proc_sysargs | |
1274 | * | |
1275 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1276 | */ | |
c906108c | 1277 | |
c3f6f71d | 1278 | long * |
fba45db2 | 1279 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1280 | { |
1281 | if (!pi->status_valid) | |
1282 | if (!proc_get_status (pi)) | |
1283 | return NULL; | |
1284 | ||
1285 | #ifdef NEW_PROC_API | |
1286 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1287 | #else | |
1288 | return (long *) &pi->prstatus.pr_sysarg; | |
1289 | #endif | |
1290 | } | |
c906108c | 1291 | |
c3f6f71d JM |
1292 | /* |
1293 | * Function: proc_syscall | |
1294 | * | |
1295 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1296 | */ | |
c906108c | 1297 | |
c3f6f71d | 1298 | int |
fba45db2 | 1299 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1300 | { |
1301 | if (!pi->status_valid) | |
1302 | if (!proc_get_status (pi)) | |
1303 | return 0; | |
1304 | ||
1305 | #ifdef NEW_PROC_API | |
1306 | return pi->prstatus.pr_lwp.pr_syscall; | |
1307 | #else | |
1308 | return pi->prstatus.pr_syscall; | |
1309 | #endif | |
1310 | } | |
1311 | #endif /* PIOCSSPCACT */ | |
c906108c | 1312 | |
c3f6f71d JM |
1313 | /* |
1314 | * Function: proc_cursig: | |
1315 | * | |
1316 | * returns the pr_cursig field (current signal). | |
1317 | */ | |
c906108c | 1318 | |
c3f6f71d JM |
1319 | long |
1320 | proc_cursig (struct procinfo *pi) | |
1321 | { | |
1322 | if (!pi->status_valid) | |
1323 | if (!proc_get_status (pi)) | |
1324 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1325 | |
c3f6f71d JM |
1326 | #ifdef NEW_PROC_API |
1327 | return pi->prstatus.pr_lwp.pr_cursig; | |
1328 | #else | |
1329 | return pi->prstatus.pr_cursig; | |
1330 | #endif | |
1331 | } | |
c906108c | 1332 | |
c3f6f71d | 1333 | /* |
0d06e24b | 1334 | * Function: proc_modify_flag |
c3f6f71d JM |
1335 | * |
1336 | * === I appologize for the messiness of this function. | |
1337 | * === This is an area where the different versions of | |
1338 | * === /proc are more inconsistent than usual. MVS | |
1339 | * | |
1340 | * Set or reset any of the following process flags: | |
1341 | * PR_FORK -- forked child will inherit trace flags | |
1342 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1343 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1344 | * PR_ASYNC -- LWP's get to run/stop independently. |
1345 | * | |
1346 | * There are three methods for doing this function: | |
1347 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1348 | * [Sol6, Sol7, UW] | |
1349 | * 2) Middle: PIOCSET/PIOCRESET | |
1350 | * [Irix, Sol5] | |
1351 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1352 | * [OSF, Sol5] | |
1353 | * | |
1354 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1355 | * Note: OSF does not define PR_KLC. |
1356 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1357 | * |
1358 | * Arguments: | |
1359 | * pi -- the procinfo | |
1360 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1361 | * mode -- 1 for set, 0 for reset. | |
1362 | * | |
1363 | * Returns non-zero for success, zero for failure. | |
1364 | */ | |
c906108c | 1365 | |
c3f6f71d | 1366 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1367 | |
c3f6f71d | 1368 | static int |
fba45db2 | 1369 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1370 | { |
1371 | long win = 0; /* default to fail */ | |
1372 | ||
1373 | /* | |
1374 | * These operations affect the process as a whole, and applying | |
1375 | * them to an individual LWP has the same meaning as applying them | |
1376 | * to the main process. Therefore, if we're ever called with a | |
1377 | * pointer to an LWP's procinfo, let's substitute the process's | |
1378 | * procinfo and avoid opening the LWP's file descriptor | |
1379 | * unnecessarily. | |
1380 | */ | |
1381 | ||
1382 | if (pi->pid != 0) | |
1383 | pi = find_procinfo_or_die (pi->pid, 0); | |
1384 | ||
1385 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1386 | /* First normalize the PCUNSET/PCRESET command opcode | |
1387 | (which for no obvious reason has a different definition | |
1388 | from one operating system to the next...) */ | |
1389 | #ifdef PCUNSET | |
1390 | #define GDBRESET PCUNSET | |
37de36c6 | 1391 | #else |
c3f6f71d JM |
1392 | #ifdef PCRESET |
1393 | #define GDBRESET PCRESET | |
37de36c6 | 1394 | #endif |
c906108c | 1395 | #endif |
c3f6f71d | 1396 | { |
37de36c6 | 1397 | procfs_ctl_t arg[2]; |
c906108c | 1398 | |
c3f6f71d JM |
1399 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1400 | arg[0] = PCSET; | |
1401 | else /* Reset the flag */ | |
1402 | arg[0] = GDBRESET; | |
c5aa993b | 1403 | |
c3f6f71d JM |
1404 | arg[1] = flag; |
1405 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1406 | } | |
1407 | #else | |
1408 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1409 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1410 | { | |
1411 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1412 | } | |
1413 | else /* Reset the flag */ | |
1414 | { | |
1415 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1416 | } | |
c906108c | 1417 | |
c3f6f71d JM |
1418 | #else |
1419 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1420 | switch (flag) { | |
1421 | case PR_RLC: | |
1422 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1423 | { | |
1424 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1425 | } | |
1426 | else /* Clear run-on-last-close */ | |
1427 | { | |
1428 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1429 | } | |
1430 | break; | |
1431 | case PR_FORK: | |
1432 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1433 | { | |
1434 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1435 | } | |
1436 | else /* Clear inherit-on-fork */ | |
1437 | { | |
1438 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1439 | } | |
1440 | break; | |
1441 | default: | |
1442 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1443 | break; | |
1444 | } | |
1445 | #endif | |
1446 | #endif | |
1447 | #endif | |
1448 | #undef GDBRESET | |
1449 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1450 | pi->status_valid = 0; | |
c906108c | 1451 | |
c3f6f71d JM |
1452 | if (!win) |
1453 | warning ("procfs: modify_flag failed to turn %s %s", | |
1454 | flag == PR_FORK ? "PR_FORK" : | |
1455 | flag == PR_RLC ? "PR_RLC" : | |
1456 | #ifdef PR_ASYNC | |
1457 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1458 | #endif |
1459 | #ifdef PR_KLC | |
1460 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1461 | #endif |
1462 | "<unknown flag>", | |
1463 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1464 | |
c3f6f71d JM |
1465 | return win; |
1466 | } | |
c906108c | 1467 | |
c3f6f71d JM |
1468 | /* |
1469 | * Function: proc_set_run_on_last_close | |
1470 | * | |
1471 | * Set the run_on_last_close flag. | |
1472 | * Process with all threads will become runnable | |
1473 | * when debugger closes all /proc fds. | |
1474 | * | |
1475 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1476 | */ |
1477 | ||
c3f6f71d | 1478 | int |
fba45db2 | 1479 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1480 | { |
c3f6f71d JM |
1481 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1482 | } | |
c906108c | 1483 | |
c3f6f71d JM |
1484 | /* |
1485 | * Function: proc_unset_run_on_last_close | |
1486 | * | |
1487 | * Reset the run_on_last_close flag. | |
1488 | * Process will NOT become runnable | |
1489 | * when debugger closes its file handles. | |
1490 | * | |
1491 | * Returns non-zero for success, zero for failure. | |
1492 | */ | |
c906108c | 1493 | |
c3f6f71d | 1494 | int |
fba45db2 | 1495 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1496 | { |
1497 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1498 | } |
1499 | ||
0d06e24b JM |
1500 | #ifdef PR_KLC |
1501 | /* | |
1502 | * Function: proc_set_kill_on_last_close | |
1503 | * | |
1504 | * Set the kill_on_last_close flag. | |
1505 | * Process with all threads will be killed when debugger | |
1506 | * closes all /proc fds (or debugger exits or dies). | |
1507 | * | |
1508 | * Returns non-zero for success, zero for failure. | |
1509 | */ | |
1510 | ||
1511 | int | |
fba45db2 | 1512 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1513 | { |
1514 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1515 | } | |
1516 | ||
1517 | /* | |
1518 | * Function: proc_unset_kill_on_last_close | |
1519 | * | |
1520 | * Reset the kill_on_last_close flag. | |
1521 | * Process will NOT be killed when debugger | |
1522 | * closes its file handles (or exits or dies). | |
1523 | * | |
1524 | * Returns non-zero for success, zero for failure. | |
1525 | */ | |
1526 | ||
1527 | int | |
fba45db2 | 1528 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1529 | { |
1530 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1531 | } | |
1532 | #endif /* PR_KLC */ | |
1533 | ||
c906108c | 1534 | /* |
c3f6f71d JM |
1535 | * Function: proc_set_inherit_on_fork |
1536 | * | |
1537 | * Set inherit_on_fork flag. | |
1538 | * If the process forks a child while we are registered for events | |
1539 | * in the parent, then we will also recieve events from the child. | |
1540 | * | |
1541 | * Returns non-zero for success, zero for failure. | |
1542 | */ | |
c906108c | 1543 | |
c3f6f71d | 1544 | int |
fba45db2 | 1545 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1546 | { |
1547 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1548 | } | |
c5aa993b | 1549 | |
c3f6f71d JM |
1550 | /* |
1551 | * Function: proc_unset_inherit_on_fork | |
1552 | * | |
1553 | * Reset inherit_on_fork flag. | |
1554 | * If the process forks a child while we are registered for events | |
1555 | * in the parent, then we will NOT recieve events from the child. | |
1556 | * | |
1557 | * Returns non-zero for success, zero for failure. | |
1558 | */ | |
c906108c | 1559 | |
c3f6f71d | 1560 | int |
fba45db2 | 1561 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1562 | { |
1563 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1564 | } | |
c906108c | 1565 | |
c3f6f71d JM |
1566 | #ifdef PR_ASYNC |
1567 | /* | |
1568 | * Function: proc_set_async | |
1569 | * | |
1570 | * Set PR_ASYNC flag. | |
1571 | * If one LWP stops because of a debug event (signal etc.), | |
1572 | * the remaining LWPs will continue to run. | |
1573 | * | |
1574 | * Returns non-zero for success, zero for failure. | |
1575 | */ | |
c906108c | 1576 | |
c3f6f71d | 1577 | int |
fba45db2 | 1578 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1579 | { |
1580 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1581 | } | |
c906108c | 1582 | |
c3f6f71d JM |
1583 | /* |
1584 | * Function: proc_unset_async | |
1585 | * | |
1586 | * Reset PR_ASYNC flag. | |
1587 | * If one LWP stops because of a debug event (signal etc.), | |
1588 | * then all other LWPs will stop as well. | |
1589 | * | |
1590 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1591 | */ |
1592 | ||
c3f6f71d | 1593 | int |
fba45db2 | 1594 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1595 | { |
1596 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1597 | } | |
1598 | #endif /* PR_ASYNC */ | |
c906108c SS |
1599 | |
1600 | /* | |
c3f6f71d JM |
1601 | * Function: proc_stop_process |
1602 | * | |
1603 | * Request the process/LWP to stop. Does not wait. | |
1604 | * Returns non-zero for success, zero for failure. | |
1605 | */ | |
c906108c | 1606 | |
c3f6f71d | 1607 | int |
fba45db2 | 1608 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1609 | { |
1610 | int win; | |
c906108c | 1611 | |
c3f6f71d JM |
1612 | /* |
1613 | * We might conceivably apply this operation to an LWP, and | |
1614 | * the LWP's ctl file descriptor might not be open. | |
1615 | */ | |
c906108c | 1616 | |
c3f6f71d JM |
1617 | if (pi->ctl_fd == 0 && |
1618 | open_procinfo_files (pi, FD_CTL) == 0) | |
1619 | return 0; | |
1620 | else | |
1621 | { | |
1622 | #ifdef NEW_PROC_API | |
37de36c6 | 1623 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1624 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1625 | #else /* ioctl method */ | |
1626 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1627 | /* Note: the call also reads the prstatus. */ | |
1628 | if (win) | |
1629 | { | |
1630 | pi->status_valid = 1; | |
1631 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1632 | proc_why (pi), | |
1633 | proc_what (pi), | |
1634 | proc_get_current_thread (pi)); | |
1635 | } | |
1636 | #endif | |
1637 | } | |
c906108c | 1638 | |
c3f6f71d JM |
1639 | return win; |
1640 | } | |
c5aa993b | 1641 | |
c3f6f71d JM |
1642 | /* |
1643 | * Function: proc_wait_for_stop | |
1644 | * | |
1645 | * Wait for the process or LWP to stop (block until it does). | |
1646 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1647 | */ |
1648 | ||
c3f6f71d | 1649 | int |
fba45db2 | 1650 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1651 | { |
c3f6f71d JM |
1652 | int win; |
1653 | ||
1654 | /* | |
1655 | * We should never have to apply this operation to any procinfo | |
1656 | * except the one for the main process. If that ever changes | |
1657 | * for any reason, then take out the following clause and | |
1658 | * replace it with one that makes sure the ctl_fd is open. | |
1659 | */ | |
1660 | ||
1661 | if (pi->tid != 0) | |
1662 | pi = find_procinfo_or_die (pi->pid, 0); | |
1663 | ||
1664 | #ifdef NEW_PROC_API | |
1665 | { | |
37de36c6 | 1666 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1667 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1668 | /* We been runnin' and we stopped -- need to update status. */ | |
1669 | pi->status_valid = 0; | |
1670 | } | |
1671 | #else /* ioctl method */ | |
1672 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1673 | /* Above call also refreshes the prstatus. */ | |
1674 | if (win) | |
1675 | { | |
1676 | pi->status_valid = 1; | |
1677 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1678 | proc_why (pi), | |
1679 | proc_what (pi), | |
1680 | proc_get_current_thread (pi)); | |
1681 | } | |
c906108c SS |
1682 | #endif |
1683 | ||
c3f6f71d | 1684 | return win; |
c906108c SS |
1685 | } |
1686 | ||
1687 | /* | |
c3f6f71d JM |
1688 | * Function: proc_run_process |
1689 | * | |
1690 | * Make the process or LWP runnable. | |
1691 | * Options (not all are implemented): | |
1692 | * - single-step | |
1693 | * - clear current fault | |
1694 | * - clear current signal | |
1695 | * - abort the current system call | |
1696 | * - stop as soon as finished with system call | |
1697 | * - (ioctl): set traced signal set | |
1698 | * - (ioctl): set held signal set | |
1699 | * - (ioctl): set traced fault set | |
1700 | * - (ioctl): set start pc (vaddr) | |
1701 | * Always clear the current fault. | |
1702 | * Clear the current signal if 'signo' is zero. | |
1703 | * | |
1704 | * Arguments: | |
1705 | * pi the process or LWP to operate on. | |
1706 | * step if true, set the process or LWP to trap after one instr. | |
1707 | * signo if zero, clear the current signal if any. | |
1708 | * if non-zero, set the current signal to this one. | |
1709 | * | |
1710 | * Returns non-zero for success, zero for failure. | |
1711 | */ | |
1712 | ||
1713 | int | |
fba45db2 | 1714 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1715 | { |
1716 | int win; | |
1717 | int runflags; | |
1718 | ||
1719 | /* | |
1720 | * We will probably have to apply this operation to individual threads, | |
1721 | * so make sure the control file descriptor is open. | |
1722 | */ | |
1723 | ||
1724 | if (pi->ctl_fd == 0 && | |
1725 | open_procinfo_files (pi, FD_CTL) == 0) | |
1726 | { | |
1727 | return 0; | |
1728 | } | |
c906108c | 1729 | |
c3f6f71d JM |
1730 | runflags = PRCFAULT; /* always clear current fault */ |
1731 | if (step) | |
1732 | runflags |= PRSTEP; | |
1733 | if (signo == 0) | |
1734 | runflags |= PRCSIG; | |
1735 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1736 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1737 | |
c3f6f71d JM |
1738 | #ifdef NEW_PROC_API |
1739 | { | |
37de36c6 | 1740 | procfs_ctl_t cmd[2]; |
c906108c | 1741 | |
c3f6f71d JM |
1742 | cmd[0] = PCRUN; |
1743 | cmd[1] = runflags; | |
1744 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1745 | } | |
1746 | #else /* ioctl method */ | |
1747 | { | |
1748 | prrun_t prrun; | |
c906108c | 1749 | |
c3f6f71d JM |
1750 | memset (&prrun, 0, sizeof (prrun)); |
1751 | prrun.pr_flags = runflags; | |
1752 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1753 | } | |
1754 | #endif | |
c906108c | 1755 | |
c3f6f71d JM |
1756 | return win; |
1757 | } | |
c906108c | 1758 | |
c3f6f71d JM |
1759 | /* |
1760 | * Function: proc_set_traced_signals | |
1761 | * | |
1762 | * Register to trace signals in the process or LWP. | |
1763 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1764 | */ |
1765 | ||
c3f6f71d | 1766 | int |
37de36c6 | 1767 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1768 | { |
c3f6f71d JM |
1769 | int win; |
1770 | ||
1771 | /* | |
1772 | * We should never have to apply this operation to any procinfo | |
1773 | * except the one for the main process. If that ever changes | |
1774 | * for any reason, then take out the following clause and | |
1775 | * replace it with one that makes sure the ctl_fd is open. | |
1776 | */ | |
1777 | ||
1778 | if (pi->tid != 0) | |
1779 | pi = find_procinfo_or_die (pi->pid, 0); | |
1780 | ||
1781 | #ifdef NEW_PROC_API | |
1782 | { | |
1783 | struct { | |
37de36c6 | 1784 | procfs_ctl_t cmd; |
c3f6f71d | 1785 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1786 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1787 | } arg; |
c906108c | 1788 | |
c3f6f71d | 1789 | arg.cmd = PCSTRACE; |
37de36c6 | 1790 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1791 | |
c3f6f71d JM |
1792 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1793 | } | |
1794 | #else /* ioctl method */ | |
1795 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1796 | #endif | |
1797 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1798 | pi->status_valid = 0; | |
c906108c | 1799 | |
c3f6f71d JM |
1800 | if (!win) |
1801 | warning ("procfs: set_traced_signals failed"); | |
1802 | return win; | |
c906108c SS |
1803 | } |
1804 | ||
1805 | /* | |
c3f6f71d JM |
1806 | * Function: proc_set_traced_faults |
1807 | * | |
1808 | * Register to trace hardware faults in the process or LWP. | |
1809 | * Returns non-zero for success, zero for failure. | |
1810 | */ | |
c906108c | 1811 | |
c3f6f71d | 1812 | int |
fba45db2 | 1813 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1814 | { |
1815 | int win; | |
1816 | ||
1817 | /* | |
1818 | * We should never have to apply this operation to any procinfo | |
1819 | * except the one for the main process. If that ever changes | |
1820 | * for any reason, then take out the following clause and | |
1821 | * replace it with one that makes sure the ctl_fd is open. | |
1822 | */ | |
1823 | ||
1824 | if (pi->tid != 0) | |
1825 | pi = find_procinfo_or_die (pi->pid, 0); | |
1826 | ||
1827 | #ifdef NEW_PROC_API | |
1828 | { | |
1829 | struct { | |
37de36c6 | 1830 | procfs_ctl_t cmd; |
c3f6f71d JM |
1831 | /* Use char array to avoid alignment issues. */ |
1832 | char fltset[sizeof (fltset_t)]; | |
1833 | } arg; | |
c906108c | 1834 | |
c3f6f71d JM |
1835 | arg.cmd = PCSFAULT; |
1836 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1837 | |
c3f6f71d JM |
1838 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1839 | } | |
1840 | #else /* ioctl method */ | |
1841 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1842 | #endif | |
1843 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1844 | pi->status_valid = 0; | |
c906108c | 1845 | |
c3f6f71d JM |
1846 | return win; |
1847 | } | |
c5aa993b | 1848 | |
c3f6f71d JM |
1849 | /* |
1850 | * Function: proc_set_traced_sysentry | |
1851 | * | |
1852 | * Register to trace entry to system calls in the process or LWP. | |
1853 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1854 | */ |
1855 | ||
c3f6f71d | 1856 | int |
fba45db2 | 1857 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1858 | { |
c3f6f71d JM |
1859 | int win; |
1860 | ||
1861 | /* | |
1862 | * We should never have to apply this operation to any procinfo | |
1863 | * except the one for the main process. If that ever changes | |
1864 | * for any reason, then take out the following clause and | |
1865 | * replace it with one that makes sure the ctl_fd is open. | |
1866 | */ | |
1867 | ||
1868 | if (pi->tid != 0) | |
1869 | pi = find_procinfo_or_die (pi->pid, 0); | |
1870 | ||
1871 | #ifdef NEW_PROC_API | |
1872 | { | |
37de36c6 KB |
1873 | struct gdb_proc_ctl_pcsentry { |
1874 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1875 | /* Use char array to avoid alignment issues. */ |
1876 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1877 | } *argp; |
1878 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1879 | - sizeof (sysset_t) | |
1880 | + sysset_t_size (pi); | |
c3f6f71d | 1881 | |
37de36c6 | 1882 | argp = xmalloc (argp_size); |
c3f6f71d | 1883 | |
37de36c6 KB |
1884 | argp->cmd = PCSENTRY; |
1885 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1886 | ||
1887 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1888 | xfree (argp); | |
c3f6f71d JM |
1889 | } |
1890 | #else /* ioctl method */ | |
1891 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1892 | #endif | |
1893 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1894 | pi->status_valid = 0; | |
1895 | ||
1896 | return win; | |
c906108c SS |
1897 | } |
1898 | ||
1899 | /* | |
c3f6f71d JM |
1900 | * Function: proc_set_traced_sysexit |
1901 | * | |
1902 | * Register to trace exit from system calls in the process or LWP. | |
1903 | * Returns non-zero for success, zero for failure. | |
1904 | */ | |
c906108c | 1905 | |
c3f6f71d | 1906 | int |
fba45db2 | 1907 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1908 | { |
1909 | int win; | |
1910 | ||
1911 | /* | |
1912 | * We should never have to apply this operation to any procinfo | |
1913 | * except the one for the main process. If that ever changes | |
1914 | * for any reason, then take out the following clause and | |
1915 | * replace it with one that makes sure the ctl_fd is open. | |
1916 | */ | |
1917 | ||
1918 | if (pi->tid != 0) | |
1919 | pi = find_procinfo_or_die (pi->pid, 0); | |
1920 | ||
1921 | #ifdef NEW_PROC_API | |
1922 | { | |
37de36c6 KB |
1923 | struct gdb_proc_ctl_pcsexit { |
1924 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1925 | /* Use char array to avoid alignment issues. */ |
1926 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1927 | } *argp; |
1928 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1929 | - sizeof (sysset_t) | |
1930 | + sysset_t_size (pi); | |
c906108c | 1931 | |
37de36c6 | 1932 | argp = xmalloc (argp_size); |
c906108c | 1933 | |
37de36c6 KB |
1934 | argp->cmd = PCSEXIT; |
1935 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1936 | ||
1937 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1938 | xfree (argp); | |
c3f6f71d JM |
1939 | } |
1940 | #else /* ioctl method */ | |
1941 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1942 | #endif | |
1943 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1944 | pi->status_valid = 0; | |
c906108c | 1945 | |
c3f6f71d JM |
1946 | return win; |
1947 | } | |
c906108c | 1948 | |
c3f6f71d JM |
1949 | /* |
1950 | * Function: proc_set_held_signals | |
1951 | * | |
1952 | * Specify the set of blocked / held signals in the process or LWP. | |
1953 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1954 | */ |
1955 | ||
c3f6f71d | 1956 | int |
37de36c6 | 1957 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1958 | { |
c3f6f71d JM |
1959 | int win; |
1960 | ||
1961 | /* | |
1962 | * We should never have to apply this operation to any procinfo | |
1963 | * except the one for the main process. If that ever changes | |
1964 | * for any reason, then take out the following clause and | |
1965 | * replace it with one that makes sure the ctl_fd is open. | |
1966 | */ | |
1967 | ||
1968 | if (pi->tid != 0) | |
1969 | pi = find_procinfo_or_die (pi->pid, 0); | |
1970 | ||
1971 | #ifdef NEW_PROC_API | |
1972 | { | |
1973 | struct { | |
37de36c6 | 1974 | procfs_ctl_t cmd; |
c3f6f71d | 1975 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1976 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1977 | } arg; |
1978 | ||
1979 | arg.cmd = PCSHOLD; | |
37de36c6 | 1980 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1981 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1982 | } | |
c906108c | 1983 | #else |
c3f6f71d | 1984 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1985 | #endif |
c3f6f71d JM |
1986 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1987 | pi->status_valid = 0; | |
1988 | ||
1989 | return win; | |
c906108c SS |
1990 | } |
1991 | ||
1992 | /* | |
c3f6f71d JM |
1993 | * Function: proc_get_pending_signals |
1994 | * | |
1995 | * returns the set of signals that are pending in the process or LWP. | |
1996 | * Will also copy the sigset if 'save' is non-zero. | |
1997 | */ | |
c906108c | 1998 | |
37de36c6 KB |
1999 | gdb_sigset_t * |
2000 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 2001 | { |
37de36c6 | 2002 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2003 | |
2004 | /* | |
2005 | * We should never have to apply this operation to any procinfo | |
2006 | * except the one for the main process. If that ever changes | |
2007 | * for any reason, then take out the following clause and | |
2008 | * replace it with one that makes sure the ctl_fd is open. | |
2009 | */ | |
2010 | ||
2011 | if (pi->tid != 0) | |
2012 | pi = find_procinfo_or_die (pi->pid, 0); | |
2013 | ||
2014 | if (!pi->status_valid) | |
2015 | if (!proc_get_status (pi)) | |
2016 | return NULL; | |
2017 | ||
2018 | #ifdef NEW_PROC_API | |
2019 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2020 | #else | |
2021 | ret = &pi->prstatus.pr_sigpend; | |
2022 | #endif | |
2023 | if (save && ret) | |
37de36c6 | 2024 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2025 | |
c3f6f71d JM |
2026 | return ret; |
2027 | } | |
c906108c | 2028 | |
c3f6f71d JM |
2029 | /* |
2030 | * Function: proc_get_signal_actions | |
2031 | * | |
2032 | * returns the set of signal actions. | |
2033 | * Will also copy the sigactionset if 'save' is non-zero. | |
2034 | */ | |
c906108c | 2035 | |
37de36c6 KB |
2036 | gdb_sigaction_t * |
2037 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2038 | { |
37de36c6 | 2039 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2040 | |
2041 | /* | |
2042 | * We should never have to apply this operation to any procinfo | |
2043 | * except the one for the main process. If that ever changes | |
2044 | * for any reason, then take out the following clause and | |
2045 | * replace it with one that makes sure the ctl_fd is open. | |
2046 | */ | |
2047 | ||
2048 | if (pi->tid != 0) | |
2049 | pi = find_procinfo_or_die (pi->pid, 0); | |
2050 | ||
2051 | if (!pi->status_valid) | |
2052 | if (!proc_get_status (pi)) | |
2053 | return NULL; | |
2054 | ||
2055 | #ifdef NEW_PROC_API | |
2056 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2057 | #else | |
2058 | ret = &pi->prstatus.pr_action; | |
2059 | #endif | |
2060 | if (save && ret) | |
37de36c6 | 2061 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2062 | |
c3f6f71d JM |
2063 | return ret; |
2064 | } | |
c5aa993b | 2065 | |
c3f6f71d JM |
2066 | /* |
2067 | * Function: proc_get_held_signals | |
2068 | * | |
2069 | * returns the set of signals that are held / blocked. | |
2070 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2071 | */ |
2072 | ||
37de36c6 KB |
2073 | gdb_sigset_t * |
2074 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2075 | { |
37de36c6 | 2076 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2077 | |
2078 | /* | |
2079 | * We should never have to apply this operation to any procinfo | |
2080 | * except the one for the main process. If that ever changes | |
2081 | * for any reason, then take out the following clause and | |
2082 | * replace it with one that makes sure the ctl_fd is open. | |
2083 | */ | |
2084 | ||
2085 | if (pi->tid != 0) | |
2086 | pi = find_procinfo_or_die (pi->pid, 0); | |
2087 | ||
2088 | #ifdef NEW_PROC_API | |
2089 | if (!pi->status_valid) | |
2090 | if (!proc_get_status (pi)) | |
2091 | return NULL; | |
2092 | ||
2093 | #ifdef UNIXWARE | |
2094 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2095 | #else |
c3f6f71d JM |
2096 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2097 | #endif /* UNIXWARE */ | |
2098 | #else /* not NEW_PROC_API */ | |
2099 | { | |
37de36c6 | 2100 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2101 | |
2102 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2103 | ret = &sigheld; | |
2104 | } | |
2105 | #endif /* NEW_PROC_API */ | |
2106 | if (save && ret) | |
37de36c6 | 2107 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2108 | |
2109 | return ret; | |
c906108c SS |
2110 | } |
2111 | ||
c3f6f71d JM |
2112 | /* |
2113 | * Function: proc_get_traced_signals | |
2114 | * | |
2115 | * returns the set of signals that are traced / debugged. | |
2116 | * Will also copy the sigset if 'save' is non-zero. | |
2117 | */ | |
2118 | ||
37de36c6 KB |
2119 | gdb_sigset_t * |
2120 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2121 | { |
37de36c6 | 2122 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2123 | |
2124 | /* | |
2125 | * We should never have to apply this operation to any procinfo | |
2126 | * except the one for the main process. If that ever changes | |
2127 | * for any reason, then take out the following clause and | |
2128 | * replace it with one that makes sure the ctl_fd is open. | |
2129 | */ | |
2130 | ||
2131 | if (pi->tid != 0) | |
2132 | pi = find_procinfo_or_die (pi->pid, 0); | |
2133 | ||
2134 | #ifdef NEW_PROC_API | |
2135 | if (!pi->status_valid) | |
2136 | if (!proc_get_status (pi)) | |
2137 | return NULL; | |
2138 | ||
2139 | ret = &pi->prstatus.pr_sigtrace; | |
2140 | #else | |
2141 | { | |
37de36c6 | 2142 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2143 | |
2144 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2145 | ret = &sigtrace; | |
2146 | } | |
c906108c | 2147 | #endif |
c3f6f71d | 2148 | if (save && ret) |
37de36c6 | 2149 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2150 | |
c3f6f71d JM |
2151 | return ret; |
2152 | } | |
c906108c | 2153 | |
c3f6f71d JM |
2154 | /* |
2155 | * Function: proc_trace_signal | |
2156 | * | |
2157 | * Add 'signo' to the set of signals that are traced. | |
2158 | * Returns non-zero for success, zero for failure. | |
2159 | */ | |
c906108c | 2160 | |
c3f6f71d | 2161 | int |
fba45db2 | 2162 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2163 | { |
37de36c6 | 2164 | gdb_sigset_t temp; |
c3f6f71d JM |
2165 | |
2166 | /* | |
2167 | * We should never have to apply this operation to any procinfo | |
2168 | * except the one for the main process. If that ever changes | |
2169 | * for any reason, then take out the following clause and | |
2170 | * replace it with one that makes sure the ctl_fd is open. | |
2171 | */ | |
2172 | ||
2173 | if (pi->tid != 0) | |
2174 | pi = find_procinfo_or_die (pi->pid, 0); | |
2175 | ||
2176 | if (pi) | |
c906108c | 2177 | { |
c3f6f71d | 2178 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2179 | { |
c3f6f71d JM |
2180 | praddset (&temp, signo); |
2181 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
2182 | } |
2183 | } | |
c5aa993b | 2184 | |
c3f6f71d JM |
2185 | return 0; /* failure */ |
2186 | } | |
c906108c | 2187 | |
c3f6f71d JM |
2188 | /* |
2189 | * Function: proc_ignore_signal | |
2190 | * | |
2191 | * Remove 'signo' from the set of signals that are traced. | |
2192 | * Returns non-zero for success, zero for failure. | |
2193 | */ | |
c906108c | 2194 | |
c3f6f71d | 2195 | int |
fba45db2 | 2196 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2197 | { |
37de36c6 | 2198 | gdb_sigset_t temp; |
c3f6f71d JM |
2199 | |
2200 | /* | |
2201 | * We should never have to apply this operation to any procinfo | |
2202 | * except the one for the main process. If that ever changes | |
2203 | * for any reason, then take out the following clause and | |
2204 | * replace it with one that makes sure the ctl_fd is open. | |
2205 | */ | |
2206 | ||
2207 | if (pi->tid != 0) | |
2208 | pi = find_procinfo_or_die (pi->pid, 0); | |
2209 | ||
2210 | if (pi) | |
c906108c | 2211 | { |
c3f6f71d | 2212 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2213 | { |
c3f6f71d JM |
2214 | prdelset (&temp, signo); |
2215 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 2216 | } |
c906108c | 2217 | } |
c906108c | 2218 | |
c3f6f71d | 2219 | return 0; /* failure */ |
c906108c SS |
2220 | } |
2221 | ||
2222 | /* | |
c3f6f71d JM |
2223 | * Function: proc_get_traced_faults |
2224 | * | |
2225 | * returns the set of hardware faults that are traced /debugged. | |
2226 | * Will also copy the faultset if 'save' is non-zero. | |
2227 | */ | |
2228 | ||
2229 | fltset_t * | |
fba45db2 | 2230 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2231 | { |
2232 | fltset_t *ret = NULL; | |
2233 | ||
2234 | /* | |
2235 | * We should never have to apply this operation to any procinfo | |
2236 | * except the one for the main process. If that ever changes | |
2237 | * for any reason, then take out the following clause and | |
2238 | * replace it with one that makes sure the ctl_fd is open. | |
2239 | */ | |
2240 | ||
2241 | if (pi->tid != 0) | |
2242 | pi = find_procinfo_or_die (pi->pid, 0); | |
2243 | ||
2244 | #ifdef NEW_PROC_API | |
2245 | if (!pi->status_valid) | |
2246 | if (!proc_get_status (pi)) | |
2247 | return NULL; | |
2248 | ||
2249 | ret = &pi->prstatus.pr_flttrace; | |
2250 | #else | |
2251 | { | |
2252 | static fltset_t flttrace; | |
2253 | ||
2254 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2255 | ret = &flttrace; | |
2256 | } | |
2257 | #endif | |
2258 | if (save && ret) | |
2259 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2260 | |
c3f6f71d JM |
2261 | return ret; |
2262 | } | |
c906108c | 2263 | |
c3f6f71d JM |
2264 | /* |
2265 | * Function: proc_get_traced_sysentry | |
2266 | * | |
2267 | * returns the set of syscalls that are traced /debugged on entry. | |
2268 | * Will also copy the syscall set if 'save' is non-zero. | |
2269 | */ | |
c906108c | 2270 | |
c3f6f71d | 2271 | sysset_t * |
fba45db2 | 2272 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2273 | { |
2274 | sysset_t *ret = NULL; | |
2275 | ||
2276 | /* | |
2277 | * We should never have to apply this operation to any procinfo | |
2278 | * except the one for the main process. If that ever changes | |
2279 | * for any reason, then take out the following clause and | |
2280 | * replace it with one that makes sure the ctl_fd is open. | |
2281 | */ | |
2282 | ||
2283 | if (pi->tid != 0) | |
2284 | pi = find_procinfo_or_die (pi->pid, 0); | |
2285 | ||
2286 | #ifdef NEW_PROC_API | |
2287 | if (!pi->status_valid) | |
2288 | if (!proc_get_status (pi)) | |
2289 | return NULL; | |
2290 | ||
37de36c6 | 2291 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2292 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2293 | #else /* DYNAMIC_SYSCALLS */ |
2294 | { | |
2295 | static sysset_t *sysentry; | |
2296 | size_t size; | |
2297 | ||
2298 | if (!sysentry) | |
2299 | sysentry = sysset_t_alloc (pi); | |
2300 | ret = sysentry; | |
2301 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2302 | return NULL; | |
2303 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2304 | { | |
2305 | gdb_premptysysset (sysentry); | |
2306 | } | |
2307 | else | |
2308 | { | |
2309 | int rsize; | |
2310 | ||
2311 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2312 | SEEK_SET) | |
2313 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2314 | return NULL; | |
2315 | size = sysset_t_size (pi); | |
2316 | gdb_premptysysset (sysentry); | |
2317 | rsize = read (pi->status_fd, sysentry, size); | |
2318 | if (rsize < 0) | |
2319 | return NULL; | |
2320 | } | |
2321 | } | |
2322 | #endif /* DYNAMIC_SYSCALLS */ | |
2323 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2324 | { |
2325 | static sysset_t sysentry; | |
c906108c | 2326 | |
c3f6f71d JM |
2327 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2328 | ret = &sysentry; | |
2329 | } | |
37de36c6 | 2330 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2331 | if (save && ret) |
37de36c6 | 2332 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2333 | |
c3f6f71d JM |
2334 | return ret; |
2335 | } | |
c5aa993b | 2336 | |
c3f6f71d JM |
2337 | /* |
2338 | * Function: proc_get_traced_sysexit | |
2339 | * | |
2340 | * returns the set of syscalls that are traced /debugged on exit. | |
2341 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2342 | */ |
2343 | ||
c3f6f71d | 2344 | sysset_t * |
fba45db2 | 2345 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2346 | { |
c3f6f71d JM |
2347 | sysset_t * ret = NULL; |
2348 | ||
2349 | /* | |
2350 | * We should never have to apply this operation to any procinfo | |
2351 | * except the one for the main process. If that ever changes | |
2352 | * for any reason, then take out the following clause and | |
2353 | * replace it with one that makes sure the ctl_fd is open. | |
2354 | */ | |
2355 | ||
2356 | if (pi->tid != 0) | |
2357 | pi = find_procinfo_or_die (pi->pid, 0); | |
2358 | ||
2359 | #ifdef NEW_PROC_API | |
2360 | if (!pi->status_valid) | |
2361 | if (!proc_get_status (pi)) | |
2362 | return NULL; | |
2363 | ||
37de36c6 | 2364 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2365 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2366 | #else /* DYNAMIC_SYSCALLS */ |
2367 | { | |
2368 | static sysset_t *sysexit; | |
2369 | size_t size; | |
2370 | ||
2371 | if (!sysexit) | |
2372 | sysexit = sysset_t_alloc (pi); | |
2373 | ret = sysexit; | |
2374 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2375 | return NULL; | |
2376 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2377 | { | |
2378 | gdb_premptysysset (sysexit); | |
2379 | } | |
2380 | else | |
2381 | { | |
2382 | int rsize; | |
2383 | ||
2384 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2385 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2386 | return NULL; | |
2387 | size = sysset_t_size (pi); | |
2388 | gdb_premptysysset (sysexit); | |
2389 | rsize = read (pi->status_fd, sysexit, size); | |
2390 | if (rsize < 0) | |
2391 | return NULL; | |
2392 | } | |
2393 | } | |
2394 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2395 | #else |
2396 | { | |
2397 | static sysset_t sysexit; | |
c5aa993b | 2398 | |
c3f6f71d JM |
2399 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2400 | ret = &sysexit; | |
2401 | } | |
2402 | #endif | |
2403 | if (save && ret) | |
37de36c6 | 2404 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2405 | |
2406 | return ret; | |
2407 | } | |
c906108c | 2408 | |
c3f6f71d JM |
2409 | /* |
2410 | * Function: proc_clear_current_fault | |
2411 | * | |
2412 | * The current fault (if any) is cleared; the associated signal | |
2413 | * will not be sent to the process or LWP when it resumes. | |
2414 | * Returns non-zero for success, zero for failure. | |
2415 | */ | |
c906108c | 2416 | |
c3f6f71d | 2417 | int |
fba45db2 | 2418 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2419 | { |
2420 | int win; | |
2421 | ||
2422 | /* | |
2423 | * We should never have to apply this operation to any procinfo | |
2424 | * except the one for the main process. If that ever changes | |
2425 | * for any reason, then take out the following clause and | |
2426 | * replace it with one that makes sure the ctl_fd is open. | |
2427 | */ | |
2428 | ||
2429 | if (pi->tid != 0) | |
2430 | pi = find_procinfo_or_die (pi->pid, 0); | |
2431 | ||
2432 | #ifdef NEW_PROC_API | |
2433 | { | |
37de36c6 | 2434 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2435 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2436 | } | |
2437 | #else | |
2438 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2439 | #endif | |
2440 | ||
2441 | return win; | |
c906108c SS |
2442 | } |
2443 | ||
2444 | /* | |
c3f6f71d JM |
2445 | * Function: proc_set_current_signal |
2446 | * | |
2447 | * Set the "current signal" that will be delivered next to the process. | |
2448 | * NOTE: semantics are different from those of KILL. | |
2449 | * This signal will be delivered to the process or LWP | |
2450 | * immediately when it is resumed (even if the signal is held/blocked); | |
2451 | * it will NOT immediately cause another event of interest, and will NOT | |
2452 | * first trap back to the debugger. | |
2453 | * | |
2454 | * Returns non-zero for success, zero for failure. | |
2455 | */ | |
2456 | ||
2457 | int | |
fba45db2 | 2458 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2459 | { |
2460 | int win; | |
2461 | struct { | |
37de36c6 | 2462 | procfs_ctl_t cmd; |
c3f6f71d | 2463 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2464 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2465 | } arg; |
37de36c6 | 2466 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2467 | |
2468 | /* | |
2469 | * We should never have to apply this operation to any procinfo | |
2470 | * except the one for the main process. If that ever changes | |
2471 | * for any reason, then take out the following clause and | |
2472 | * replace it with one that makes sure the ctl_fd is open. | |
2473 | */ | |
2474 | ||
2475 | if (pi->tid != 0) | |
2476 | pi = find_procinfo_or_die (pi->pid, 0); | |
2477 | ||
2478 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2479 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2480 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2481 | * it messes up the current signal. Work around the kernel bug. | |
2482 | */ | |
2483 | if (signo > 0 && | |
2484 | signo == proc_cursig (pi)) | |
2485 | return 1; /* I assume this is a success? */ | |
2486 | #endif | |
2487 | ||
2488 | /* The pointer is just a type alias. */ | |
37de36c6 | 2489 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2490 | mysinfo->si_signo = signo; |
2491 | mysinfo->si_code = 0; | |
2492 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2493 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2494 | ||
2495 | #ifdef NEW_PROC_API | |
2496 | arg.cmd = PCSSIG; | |
2497 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2498 | #else | |
2499 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2500 | #endif | |
c906108c | 2501 | |
c3f6f71d JM |
2502 | return win; |
2503 | } | |
c906108c | 2504 | |
c3f6f71d JM |
2505 | /* |
2506 | * Function: proc_clear_current_signal | |
2507 | * | |
2508 | * The current signal (if any) is cleared, and | |
2509 | * is not sent to the process or LWP when it resumes. | |
2510 | * Returns non-zero for success, zero for failure. | |
2511 | */ | |
c906108c | 2512 | |
c3f6f71d | 2513 | int |
fba45db2 | 2514 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2515 | { |
2516 | int win; | |
2517 | ||
2518 | /* | |
2519 | * We should never have to apply this operation to any procinfo | |
2520 | * except the one for the main process. If that ever changes | |
2521 | * for any reason, then take out the following clause and | |
2522 | * replace it with one that makes sure the ctl_fd is open. | |
2523 | */ | |
2524 | ||
2525 | if (pi->tid != 0) | |
2526 | pi = find_procinfo_or_die (pi->pid, 0); | |
2527 | ||
2528 | #ifdef NEW_PROC_API | |
2529 | { | |
2530 | struct { | |
37de36c6 | 2531 | procfs_ctl_t cmd; |
c3f6f71d | 2532 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2533 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2534 | } arg; |
37de36c6 | 2535 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2536 | |
2537 | arg.cmd = PCSSIG; | |
2538 | /* The pointer is just a type alias. */ | |
37de36c6 | 2539 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2540 | mysinfo->si_signo = 0; |
2541 | mysinfo->si_code = 0; | |
2542 | mysinfo->si_errno = 0; | |
2543 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2544 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2545 | ||
2546 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2547 | } | |
2548 | #else | |
2549 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2550 | #endif | |
c906108c | 2551 | |
c3f6f71d JM |
2552 | return win; |
2553 | } | |
c906108c | 2554 | |
c3f6f71d JM |
2555 | /* |
2556 | * Function: proc_get_gregs | |
2557 | * | |
2558 | * Get the general registers for the process or LWP. | |
2559 | * Returns non-zero for success, zero for failure. | |
2560 | */ | |
c906108c | 2561 | |
c3f6f71d | 2562 | gdb_gregset_t * |
fba45db2 | 2563 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2564 | { |
2565 | if (!pi->status_valid || !pi->gregs_valid) | |
2566 | if (!proc_get_status (pi)) | |
2567 | return NULL; | |
2568 | ||
2569 | /* | |
2570 | * OK, sorry about the ifdef's. | |
2571 | * There's three cases instead of two, because | |
2572 | * in this instance Unixware and Solaris/RW differ. | |
2573 | */ | |
2574 | ||
2575 | #ifdef NEW_PROC_API | |
2576 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2577 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2578 | #else /* not Unixware */ | |
2579 | return &pi->prstatus.pr_lwp.pr_reg; | |
2580 | #endif /* Unixware */ | |
2581 | #else /* not NEW_PROC_API */ | |
2582 | return &pi->prstatus.pr_reg; | |
2583 | #endif /* NEW_PROC_API */ | |
2584 | } | |
c5aa993b | 2585 | |
c3f6f71d JM |
2586 | /* |
2587 | * Function: proc_get_fpregs | |
2588 | * | |
2589 | * Get the floating point registers for the process or LWP. | |
2590 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2591 | */ |
2592 | ||
c3f6f71d | 2593 | gdb_fpregset_t * |
fba45db2 | 2594 | proc_get_fpregs (procinfo *pi) |
c906108c | 2595 | { |
c3f6f71d JM |
2596 | #ifdef NEW_PROC_API |
2597 | if (!pi->status_valid || !pi->fpregs_valid) | |
2598 | if (!proc_get_status (pi)) | |
2599 | return NULL; | |
2600 | ||
2601 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2602 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2603 | #else | |
2604 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2605 | #endif /* Unixware */ | |
c5aa993b | 2606 | |
c3f6f71d JM |
2607 | #else /* not NEW_PROC_API */ |
2608 | if (pi->fpregs_valid) | |
2609 | return &pi->fpregset; /* already got 'em */ | |
2610 | else | |
c906108c | 2611 | { |
c3f6f71d JM |
2612 | if (pi->ctl_fd == 0 && |
2613 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2614 | { |
c3f6f71d | 2615 | return NULL; |
c906108c | 2616 | } |
c3f6f71d | 2617 | else |
c906108c | 2618 | { |
c3f6f71d JM |
2619 | #ifdef PIOCTGFPREG |
2620 | struct { | |
2621 | long pr_count; | |
2622 | tid_t pr_error_thread; | |
2623 | tfpregset_t thread_1; | |
2624 | } thread_fpregs; | |
2625 | ||
2626 | thread_fpregs.pr_count = 1; | |
2627 | thread_fpregs.thread_1.tid = pi->tid; | |
2628 | ||
2629 | if (pi->tid == 0 && | |
2630 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2631 | { | |
2632 | pi->fpregs_valid = 1; | |
2633 | return &pi->fpregset; /* got 'em now! */ | |
2634 | } | |
2635 | else if (pi->tid != 0 && | |
2636 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2637 | { | |
2638 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2639 | sizeof (pi->fpregset)); | |
2640 | pi->fpregs_valid = 1; | |
2641 | return &pi->fpregset; /* got 'em now! */ | |
2642 | } | |
2643 | else | |
2644 | { | |
2645 | return NULL; | |
2646 | } | |
2647 | #else | |
2648 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2649 | { | |
2650 | pi->fpregs_valid = 1; | |
2651 | return &pi->fpregset; /* got 'em now! */ | |
2652 | } | |
2653 | else | |
2654 | { | |
2655 | return NULL; | |
2656 | } | |
2657 | #endif | |
c906108c | 2658 | } |
c906108c | 2659 | } |
c3f6f71d | 2660 | #endif |
c906108c SS |
2661 | } |
2662 | ||
c3f6f71d JM |
2663 | /* |
2664 | * Function: proc_set_gregs | |
2665 | * | |
2666 | * Write the general registers back to the process or LWP. | |
2667 | * Returns non-zero for success, zero for failure. | |
2668 | */ | |
2669 | ||
2670 | int | |
fba45db2 | 2671 | proc_set_gregs (procinfo *pi) |
c906108c | 2672 | { |
c3f6f71d JM |
2673 | gdb_gregset_t *gregs; |
2674 | int win; | |
c5aa993b | 2675 | |
c3f6f71d JM |
2676 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2677 | return 0; /* get_regs has already warned */ | |
2678 | ||
2679 | if (pi->ctl_fd == 0 && | |
2680 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2681 | { |
c3f6f71d | 2682 | return 0; |
c906108c | 2683 | } |
c3f6f71d | 2684 | else |
c906108c | 2685 | { |
c3f6f71d JM |
2686 | #ifdef NEW_PROC_API |
2687 | struct { | |
37de36c6 | 2688 | procfs_ctl_t cmd; |
c3f6f71d JM |
2689 | /* Use char array to avoid alignment issues. */ |
2690 | char gregs[sizeof (gdb_gregset_t)]; | |
2691 | } arg; | |
2692 | ||
2693 | arg.cmd = PCSREG; | |
2694 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2695 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2696 | #else | |
2697 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2698 | #endif | |
c906108c | 2699 | } |
c3f6f71d JM |
2700 | |
2701 | /* Policy: writing the regs invalidates our cache. */ | |
2702 | pi->gregs_valid = 0; | |
2703 | return win; | |
c906108c SS |
2704 | } |
2705 | ||
c3f6f71d JM |
2706 | /* |
2707 | * Function: proc_set_fpregs | |
2708 | * | |
2709 | * Modify the floating point register set of the process or LWP. | |
2710 | * Returns non-zero for success, zero for failure. | |
2711 | */ | |
2712 | ||
2713 | int | |
fba45db2 | 2714 | proc_set_fpregs (procinfo *pi) |
c906108c | 2715 | { |
c3f6f71d JM |
2716 | gdb_fpregset_t *fpregs; |
2717 | int win; | |
2718 | ||
2719 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2720 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2721 | |
c3f6f71d JM |
2722 | if (pi->ctl_fd == 0 && |
2723 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2724 | { |
c3f6f71d | 2725 | return 0; |
c906108c | 2726 | } |
c3f6f71d | 2727 | else |
c906108c | 2728 | { |
c3f6f71d JM |
2729 | #ifdef NEW_PROC_API |
2730 | struct { | |
37de36c6 | 2731 | procfs_ctl_t cmd; |
c3f6f71d JM |
2732 | /* Use char array to avoid alignment issues. */ |
2733 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2734 | } arg; | |
2735 | ||
2736 | arg.cmd = PCSFPREG; | |
2737 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2738 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2739 | #else | |
2740 | #ifdef PIOCTSFPREG | |
2741 | if (pi->tid == 0) | |
2742 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2743 | else | |
2744 | { | |
2745 | struct { | |
2746 | long pr_count; | |
2747 | tid_t pr_error_thread; | |
2748 | tfpregset_t thread_1; | |
2749 | } thread_fpregs; | |
2750 | ||
2751 | thread_fpregs.pr_count = 1; | |
2752 | thread_fpregs.thread_1.tid = pi->tid; | |
2753 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2754 | sizeof (*fpregs)); | |
2755 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2756 | } | |
2757 | #else | |
2758 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2759 | #endif /* osf PIOCTSFPREG */ | |
2760 | #endif /* NEW_PROC_API */ | |
c906108c | 2761 | } |
c3f6f71d JM |
2762 | |
2763 | /* Policy: writing the regs invalidates our cache. */ | |
2764 | pi->fpregs_valid = 0; | |
2765 | return win; | |
c906108c SS |
2766 | } |
2767 | ||
2768 | /* | |
c3f6f71d JM |
2769 | * Function: proc_kill |
2770 | * | |
2771 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2772 | * Returns non-zero for success, zero for failure. | |
2773 | */ | |
c906108c | 2774 | |
c3f6f71d | 2775 | int |
fba45db2 | 2776 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2777 | { |
2778 | int win; | |
c906108c | 2779 | |
c3f6f71d JM |
2780 | /* |
2781 | * We might conceivably apply this operation to an LWP, and | |
2782 | * the LWP's ctl file descriptor might not be open. | |
2783 | */ | |
c906108c | 2784 | |
c3f6f71d JM |
2785 | if (pi->ctl_fd == 0 && |
2786 | open_procinfo_files (pi, FD_CTL) == 0) | |
2787 | { | |
2788 | return 0; | |
2789 | } | |
2790 | else | |
2791 | { | |
2792 | #ifdef NEW_PROC_API | |
37de36c6 | 2793 | procfs_ctl_t cmd[2]; |
c906108c | 2794 | |
c3f6f71d JM |
2795 | cmd[0] = PCKILL; |
2796 | cmd[1] = signo; | |
2797 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2798 | #else /* ioctl method */ | |
2799 | /* FIXME: do I need the Alpha OSF fixups present in | |
2800 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2801 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2802 | #endif | |
2803 | } | |
c906108c | 2804 | |
c3f6f71d JM |
2805 | return win; |
2806 | } | |
c906108c | 2807 | |
c3f6f71d JM |
2808 | /* |
2809 | * Function: proc_parent_pid | |
2810 | * | |
2811 | * Find the pid of the process that started this one. | |
2812 | * Returns the parent process pid, or zero. | |
c906108c SS |
2813 | */ |
2814 | ||
c3f6f71d | 2815 | int |
fba45db2 | 2816 | proc_parent_pid (procinfo *pi) |
c906108c | 2817 | { |
c3f6f71d JM |
2818 | /* |
2819 | * We should never have to apply this operation to any procinfo | |
2820 | * except the one for the main process. If that ever changes | |
2821 | * for any reason, then take out the following clause and | |
2822 | * replace it with one that makes sure the ctl_fd is open. | |
2823 | */ | |
2824 | ||
2825 | if (pi->tid != 0) | |
2826 | pi = find_procinfo_or_die (pi->pid, 0); | |
2827 | ||
2828 | if (!pi->status_valid) | |
2829 | if (!proc_get_status (pi)) | |
2830 | return 0; | |
c5aa993b | 2831 | |
c3f6f71d JM |
2832 | return pi->prstatus.pr_ppid; |
2833 | } | |
2834 | ||
2835 | ||
2836 | /* | |
2837 | * Function: proc_set_watchpoint | |
2838 | * | |
2839 | */ | |
2840 | ||
2841 | int | |
fba45db2 | 2842 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d JM |
2843 | { |
2844 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2845 | return 0; | |
2846 | #else | |
2847 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2848 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2849 | return 0; | |
2850 | #else | |
2851 | struct { | |
37de36c6 | 2852 | procfs_ctl_t cmd; |
c3f6f71d JM |
2853 | char watch[sizeof (prwatch_t)]; |
2854 | } arg; | |
2855 | prwatch_t *pwatch; | |
2856 | ||
2857 | pwatch = (prwatch_t *) &arg.watch; | |
ac2e2ef7 | 2858 | pwatch->pr_vaddr = address_to_host_pointer (addr); |
c3f6f71d JM |
2859 | pwatch->pr_size = len; |
2860 | pwatch->pr_wflags = wflags; | |
2861 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2862 | arg.cmd = PCWATCH; | |
2863 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2864 | #else | |
2865 | #if defined (PIOCSWATCH) | |
2866 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2867 | #else | |
2868 | return 0; /* Fail */ | |
2869 | #endif | |
2870 | #endif | |
2871 | #endif | |
2872 | #endif | |
c906108c SS |
2873 | } |
2874 | ||
2875 | /* | |
c3f6f71d JM |
2876 | * Function: proc_iterate_over_mappings |
2877 | * | |
2878 | * Given a pointer to a function, call that function once for every | |
2879 | * mapped address space in the process. The callback function | |
2880 | * receives an open file descriptor for the file corresponding to | |
2881 | * that mapped address space (if there is one), and the base address | |
2882 | * of the mapped space. Quit when the callback function returns a | |
2883 | * nonzero value, or at teh end of the mappings. | |
2884 | * | |
2885 | * Returns: the first non-zero return value of the callback function, | |
2886 | * or zero. | |
2887 | */ | |
c906108c | 2888 | |
c3f6f71d JM |
2889 | /* FIXME: it's probably a waste to cache this FD. |
2890 | It doesn't get called that often... and if I open it | |
2891 | every time, I don't need to lseek it. */ | |
2892 | int | |
d0849a9a | 2893 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) |
c3f6f71d JM |
2894 | { |
2895 | struct prmap *map; | |
2896 | procinfo *pi; | |
0d06e24b | 2897 | #ifndef NEW_PROC_API /* avoid compiler warning */ |
0fda6bd2 JM |
2898 | int nmaps = 0; |
2899 | int i; | |
2900 | #else | |
2901 | int map_fd; | |
2902 | char pathname[MAX_PROC_NAME_SIZE]; | |
0d06e24b | 2903 | #endif |
c3f6f71d | 2904 | int funcstat = 0; |
0fda6bd2 | 2905 | int fd; |
c906108c | 2906 | |
c3f6f71d | 2907 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); |
c906108c | 2908 | |
c3f6f71d JM |
2909 | #ifdef NEW_PROC_API |
2910 | /* Open map fd. */ | |
2911 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
4d1bcd09 | 2912 | if ((map_fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c3f6f71d | 2913 | proc_error (pi, "proc_iterate_over_mappings (open)", __LINE__); |
c906108c | 2914 | |
c3f6f71d | 2915 | /* Make sure it gets closed again. */ |
004527cb | 2916 | make_cleanup_close (map_fd); |
c906108c | 2917 | |
c3f6f71d JM |
2918 | /* Allocate space for mapping (lifetime only for this function). */ |
2919 | map = alloca (sizeof (struct prmap)); | |
c906108c | 2920 | |
c3f6f71d JM |
2921 | /* Now read the mappings from the file, |
2922 | open a file descriptor for those that have a name, | |
2923 | and call the callback function. */ | |
2924 | while (read (map_fd, | |
2925 | (void *) map, | |
2926 | sizeof (struct prmap)) == sizeof (struct prmap)) | |
2927 | { | |
2928 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
c906108c | 2929 | |
c3f6f71d JM |
2930 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
2931 | break; /* sanity */ | |
c906108c | 2932 | |
c3f6f71d JM |
2933 | if (map->pr_mapname[0] == 0) |
2934 | { | |
2935 | fd = -1; /* no map file */ | |
2936 | } | |
2937 | else | |
2938 | { | |
2939 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
2940 | /* Note: caller's responsibility to close this fd! */ | |
4d1bcd09 | 2941 | fd = open_with_retry (name, O_RDONLY); |
c3f6f71d JM |
2942 | /* Note: we don't test the above call for failure; |
2943 | we just pass the FD on as given. Sometimes there is | |
2944 | no file, so the ioctl may return failure, but that's | |
2945 | not a problem. */ | |
2946 | } | |
c906108c | 2947 | |
c3f6f71d JM |
2948 | /* Stop looping if the callback returns non-zero. */ |
2949 | if ((funcstat = (*func) (fd, (CORE_ADDR) map->pr_vaddr)) != 0) | |
2950 | break; | |
2951 | } | |
2952 | #else | |
2953 | /* Get the number of mapping entries. */ | |
2954 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmaps) < 0) | |
2955 | proc_error (pi, "proc_iterate_over_mappings (PIOCNMAP)", __LINE__); | |
2956 | ||
2957 | /* Allocate space for mappings (lifetime only this function). */ | |
2958 | map = (struct prmap *) alloca ((nmaps + 1) * sizeof (struct prmap)); | |
2959 | ||
2960 | /* Read in all the mappings. */ | |
2961 | if (ioctl (pi->ctl_fd, PIOCMAP, map) < 0) | |
2962 | proc_error (pi, "proc_iterate_over_mappings (PIOCMAP)", __LINE__); | |
2963 | ||
2964 | /* Now loop through the mappings, open an fd for each, and | |
2965 | call the callback function. */ | |
2966 | for (i = 0; | |
2967 | i < nmaps && map[i].pr_size != 0; | |
2968 | i++) | |
2969 | { | |
2970 | /* Note: caller's responsibility to close this fd! */ | |
2971 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map[i].pr_vaddr); | |
2972 | /* Note: we don't test the above call for failure; | |
2973 | we just pass the FD on as given. Sometimes there is | |
2974 | no file, so the ioctl may return failure, but that's | |
2975 | not a problem. */ | |
2976 | ||
2977 | /* Stop looping if the callback returns non-zero. */ | |
ac2e2ef7 AC |
2978 | funcstat = (*func) (fd, host_pointer_to_address (map[i].pr_vaddr)); |
2979 | if (funcstat != 0) | |
c3f6f71d JM |
2980 | break; |
2981 | } | |
c906108c | 2982 | #endif |
c906108c | 2983 | |
c3f6f71d JM |
2984 | return funcstat; |
2985 | } | |
c906108c | 2986 | |
c3f6f71d | 2987 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2988 | |
c3f6f71d | 2989 | #include <sys/sysi86.h> |
c906108c | 2990 | |
c3f6f71d JM |
2991 | /* |
2992 | * Function: proc_get_LDT_entry | |
2993 | * | |
2994 | * Inputs: | |
2995 | * procinfo *pi; | |
2996 | * int key; | |
2997 | * | |
2998 | * The 'key' is actually the value of the lower 16 bits of | |
2999 | * the GS register for the LWP that we're interested in. | |
3000 | * | |
3001 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
3002 | */ |
3003 | ||
c3f6f71d | 3004 | struct ssd * |
fba45db2 | 3005 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 3006 | { |
c3f6f71d JM |
3007 | static struct ssd *ldt_entry = NULL; |
3008 | #ifdef NEW_PROC_API | |
3009 | char pathname[MAX_PROC_NAME_SIZE]; | |
3010 | struct cleanup *old_chain = NULL; | |
3011 | int fd; | |
3012 | ||
3013 | /* Allocate space for one LDT entry. | |
3014 | This alloc must persist, because we return a pointer to it. */ | |
3015 | if (ldt_entry == NULL) | |
3016 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
3017 | ||
3018 | /* Open the file descriptor for the LDT table. */ | |
3019 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 3020 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 3021 | { |
c3f6f71d JM |
3022 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
3023 | return NULL; | |
c906108c | 3024 | } |
c3f6f71d | 3025 | /* Make sure it gets closed again! */ |
004527cb | 3026 | old_chain = make_cleanup_close (fd); |
c906108c | 3027 | |
c3f6f71d JM |
3028 | /* Now 'read' thru the table, find a match and return it. */ |
3029 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 3030 | { |
c3f6f71d JM |
3031 | if (ldt_entry->sel == 0 && |
3032 | ldt_entry->bo == 0 && | |
3033 | ldt_entry->acc1 == 0 && | |
3034 | ldt_entry->acc2 == 0) | |
3035 | break; /* end of table */ | |
3036 | /* If key matches, return this entry. */ | |
3037 | if (ldt_entry->sel == key) | |
3038 | return ldt_entry; | |
c906108c | 3039 | } |
c3f6f71d JM |
3040 | /* Loop ended, match not found. */ |
3041 | return NULL; | |
3042 | #else | |
3043 | int nldt, i; | |
3044 | static int nalloc = 0; | |
c906108c | 3045 | |
c3f6f71d JM |
3046 | /* Get the number of LDT entries. */ |
3047 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 3048 | { |
c3f6f71d JM |
3049 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
3050 | return NULL; | |
c906108c SS |
3051 | } |
3052 | ||
c3f6f71d JM |
3053 | /* Allocate space for the number of LDT entries. */ |
3054 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
3055 | if (nldt > nalloc) | |
c906108c | 3056 | { |
c3f6f71d JM |
3057 | ldt_entry = (struct ssd *) |
3058 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
3059 | nalloc = nldt; | |
3060 | } | |
3061 | ||
3062 | /* Read the whole table in one gulp. */ | |
3063 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
3064 | { | |
3065 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
3066 | return NULL; | |
c906108c SS |
3067 | } |
3068 | ||
c3f6f71d JM |
3069 | /* Search the table and return the (first) entry matching 'key'. */ |
3070 | for (i = 0; i < nldt; i++) | |
3071 | if (ldt_entry[i].sel == key) | |
3072 | return &ldt_entry[i]; | |
c906108c | 3073 | |
c3f6f71d JM |
3074 | /* Loop ended, match not found. */ |
3075 | return NULL; | |
3076 | #endif | |
3077 | } | |
c906108c | 3078 | |
c3f6f71d | 3079 | #endif /* TM_I386SOL2_H */ |
c906108c | 3080 | |
c3f6f71d | 3081 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 3082 | |
c3f6f71d | 3083 | /* =================== Thread "MODULE" =================== */ |
c906108c | 3084 | |
c3f6f71d JM |
3085 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
3086 | since there is a different way to do threads on every OS. */ | |
c906108c | 3087 | |
c3f6f71d JM |
3088 | /* |
3089 | * Function: proc_get_nthreads | |
3090 | * | |
3091 | * Return the number of threads for the process | |
3092 | */ | |
c906108c | 3093 | |
c3f6f71d JM |
3094 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
3095 | /* | |
3096 | * OSF version | |
3097 | */ | |
3098 | int | |
fba45db2 | 3099 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
3100 | { |
3101 | int nthreads = 0; | |
c906108c | 3102 | |
c3f6f71d JM |
3103 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3104 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3105 | |
c3f6f71d | 3106 | return nthreads; |
c906108c SS |
3107 | } |
3108 | ||
c3f6f71d JM |
3109 | #else |
3110 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3111 | /* | |
3112 | * Solaris and Unixware version | |
3113 | */ | |
3114 | int | |
fba45db2 | 3115 | proc_get_nthreads (procinfo *pi) |
c906108c | 3116 | { |
c3f6f71d JM |
3117 | if (!pi->status_valid) |
3118 | if (!proc_get_status (pi)) | |
3119 | return 0; | |
c5aa993b | 3120 | |
c3f6f71d JM |
3121 | /* |
3122 | * NEW_PROC_API: only works for the process procinfo, | |
3123 | * because the LWP procinfos do not get prstatus filled in. | |
3124 | */ | |
3125 | #ifdef NEW_PROC_API | |
3126 | if (pi->tid != 0) /* find the parent process procinfo */ | |
3127 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3128 | #endif |
c3f6f71d | 3129 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3130 | } |
3131 | ||
c3f6f71d JM |
3132 | #else |
3133 | /* | |
3134 | * Default version | |
3135 | */ | |
3136 | int | |
fba45db2 | 3137 | proc_get_nthreads (procinfo *pi) |
c906108c | 3138 | { |
c3f6f71d JM |
3139 | return 0; |
3140 | } | |
3141 | #endif | |
3142 | #endif | |
3143 | ||
3144 | /* | |
3145 | * Function: proc_get_current_thread (LWP version) | |
3146 | * | |
3147 | * Return the ID of the thread that had an event of interest. | |
3148 | * (ie. the one that hit a breakpoint or other traced event). | |
3149 | * All other things being equal, this should be the ID of a | |
3150 | * thread that is currently executing. | |
3151 | */ | |
3152 | ||
3153 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3154 | /* | |
3155 | * Solaris and Unixware version | |
3156 | */ | |
3157 | int | |
fba45db2 | 3158 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3159 | { |
3160 | /* | |
3161 | * Note: this should be applied to the root procinfo for the process, | |
3162 | * not to the procinfo for an LWP. If applied to the procinfo for | |
3163 | * an LWP, it will simply return that LWP's ID. In that case, | |
3164 | * find the parent process procinfo. | |
3165 | */ | |
3166 | ||
3167 | if (pi->tid != 0) | |
3168 | pi = find_procinfo_or_die (pi->pid, 0); | |
3169 | ||
3170 | if (!pi->status_valid) | |
3171 | if (!proc_get_status (pi)) | |
3172 | return 0; | |
3173 | ||
3174 | #ifdef NEW_PROC_API | |
3175 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3176 | #else |
c3f6f71d | 3177 | return pi->prstatus.pr_who; |
c906108c | 3178 | #endif |
c3f6f71d | 3179 | } |
c906108c | 3180 | |
c3f6f71d JM |
3181 | #else |
3182 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3183 | /* | |
3184 | * OSF version | |
3185 | */ | |
3186 | int | |
fba45db2 | 3187 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3188 | { |
3189 | #if 0 /* FIXME: not ready for prime time? */ | |
3190 | return pi->prstatus.pr_tid; | |
3191 | #else | |
3192 | return 0; | |
3193 | #endif | |
c906108c SS |
3194 | } |
3195 | ||
c3f6f71d JM |
3196 | #else |
3197 | /* | |
3198 | * Default version | |
3199 | */ | |
3200 | int | |
fba45db2 | 3201 | proc_get_current_thread (procinfo *pi) |
c906108c | 3202 | { |
c3f6f71d JM |
3203 | return 0; |
3204 | } | |
3205 | ||
3206 | #endif | |
3207 | #endif | |
c906108c | 3208 | |
c3f6f71d JM |
3209 | /* |
3210 | * Function: proc_update_threads | |
3211 | * | |
3212 | * Discover the IDs of all the threads within the process, and | |
3213 | * create a procinfo for each of them (chained to the parent). | |
3214 | * | |
3215 | * This unfortunately requires a different method on every OS. | |
3216 | * | |
3217 | * Return: non-zero for success, zero for failure. | |
3218 | */ | |
c906108c | 3219 | |
c3f6f71d | 3220 | int |
fba45db2 | 3221 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3222 | { |
3223 | if (thread && parent) /* sanity */ | |
c906108c | 3224 | { |
c3f6f71d JM |
3225 | thread->status_valid = 0; |
3226 | if (!proc_get_status (thread)) | |
3227 | destroy_one_procinfo (&parent->thread_list, thread); | |
3228 | } | |
3229 | return 0; /* keep iterating */ | |
3230 | } | |
c5aa993b | 3231 | |
c3f6f71d JM |
3232 | #if defined (PIOCLSTATUS) |
3233 | /* | |
3234 | * Solaris 2.5 (ioctl) version | |
3235 | */ | |
3236 | int | |
fba45db2 | 3237 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3238 | { |
3239 | gdb_prstatus_t *prstatus; | |
3240 | struct cleanup *old_chain = NULL; | |
3241 | procinfo *thread; | |
3242 | int nlwp, i; | |
3243 | ||
3244 | /* | |
3245 | * We should never have to apply this operation to any procinfo | |
3246 | * except the one for the main process. If that ever changes | |
3247 | * for any reason, then take out the following clause and | |
3248 | * replace it with one that makes sure the ctl_fd is open. | |
3249 | */ | |
3250 | ||
3251 | if (pi->tid != 0) | |
3252 | pi = find_procinfo_or_die (pi->pid, 0); | |
3253 | ||
3254 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3255 | ||
3256 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3257 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3258 | ||
3c37485b | 3259 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3260 | |
b8c9b27d | 3261 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3262 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3263 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3264 | ||
3265 | /* Skip element zero, which represents the process as a whole. */ | |
3266 | for (i = 1; i < nlwp + 1; i++) | |
3267 | { | |
3268 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3269 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3270 | |
c3f6f71d JM |
3271 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3272 | thread->status_valid = 1; | |
3273 | } | |
3274 | pi->threads_valid = 1; | |
3275 | do_cleanups (old_chain); | |
3276 | return 1; | |
3277 | } | |
3278 | #else | |
3279 | #ifdef NEW_PROC_API | |
3280 | /* | |
3281 | * Unixware and Solaris 6 (and later) version | |
3282 | */ | |
004527cb AC |
3283 | static void |
3284 | do_closedir_cleanup (void *dir) | |
3285 | { | |
3286 | closedir (dir); | |
3287 | } | |
3288 | ||
c3f6f71d | 3289 | int |
fba45db2 | 3290 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3291 | { |
3292 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3293 | struct dirent *direntry; | |
3294 | struct cleanup *old_chain = NULL; | |
3295 | procinfo *thread; | |
3296 | DIR *dirp; | |
3297 | int lwpid; | |
3298 | ||
3299 | /* | |
3300 | * We should never have to apply this operation to any procinfo | |
3301 | * except the one for the main process. If that ever changes | |
3302 | * for any reason, then take out the following clause and | |
3303 | * replace it with one that makes sure the ctl_fd is open. | |
3304 | */ | |
3305 | ||
3306 | if (pi->tid != 0) | |
3307 | pi = find_procinfo_or_die (pi->pid, 0); | |
3308 | ||
3309 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3310 | ||
3311 | /* | |
3312 | * Unixware | |
3313 | * | |
3314 | * Note: this brute-force method is the only way I know of | |
3315 | * to accomplish this task on Unixware. This method will | |
3316 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3317 | * and more elegant way to do this on Solaris, but the margins | |
3318 | * of this manuscript are too small to write it here... ;-) | |
3319 | */ | |
3320 | ||
3321 | strcpy (pathname, pi->pathname); | |
3322 | strcat (pathname, "/lwp"); | |
3323 | if ((dirp = opendir (pathname)) == NULL) | |
3324 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3325 | ||
004527cb | 3326 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3327 | while ((direntry = readdir (dirp)) != NULL) |
3328 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3329 | { | |
3330 | lwpid = atoi (&direntry->d_name[0]); | |
3331 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3332 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3333 | } | |
3334 | pi->threads_valid = 1; | |
3335 | do_cleanups (old_chain); | |
3336 | return 1; | |
3337 | } | |
3338 | #else | |
3339 | #ifdef PIOCTLIST | |
3340 | /* | |
3341 | * OSF version | |
3342 | */ | |
3343 | int | |
fba45db2 | 3344 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3345 | { |
3346 | int nthreads, i; | |
3347 | tid_t *threads; | |
3348 | ||
3349 | /* | |
3350 | * We should never have to apply this operation to any procinfo | |
3351 | * except the one for the main process. If that ever changes | |
3352 | * for any reason, then take out the following clause and | |
3353 | * replace it with one that makes sure the ctl_fd is open. | |
3354 | */ | |
3355 | ||
3356 | if (pi->tid != 0) | |
3357 | pi = find_procinfo_or_die (pi->pid, 0); | |
3358 | ||
3359 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3360 | ||
3361 | nthreads = proc_get_nthreads (pi); | |
3362 | if (nthreads < 2) | |
3363 | return 0; /* nothing to do for 1 or fewer threads */ | |
3364 | ||
3c37485b | 3365 | threads = xmalloc (nthreads * sizeof (tid_t)); |
c3f6f71d JM |
3366 | |
3367 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3368 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3369 | ||
3370 | for (i = 0; i < nthreads; i++) | |
3371 | { | |
3372 | if (!find_procinfo (pi->pid, threads[i])) | |
3373 | if (!create_procinfo (pi->pid, threads[i])) | |
3374 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3375 | } |
c3f6f71d JM |
3376 | pi->threads_valid = 1; |
3377 | return 1; | |
c906108c | 3378 | } |
c3f6f71d JM |
3379 | #else |
3380 | /* | |
3381 | * Default version | |
3382 | */ | |
3383 | int | |
fba45db2 | 3384 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3385 | { |
3386 | return 0; | |
3387 | } | |
3388 | #endif /* OSF PIOCTLIST */ | |
3389 | #endif /* NEW_PROC_API */ | |
3390 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3391 | |
c3f6f71d JM |
3392 | /* |
3393 | * Function: proc_iterate_over_threads | |
3394 | * | |
3395 | * Description: | |
3396 | * Given a pointer to a function, call that function once | |
3397 | * for each lwp in the procinfo list, until the function | |
3398 | * returns non-zero, in which event return the value | |
3399 | * returned by the function. | |
3400 | * | |
3401 | * Note: this function does NOT call update_threads. | |
3402 | * If you want to discover new threads first, you must | |
3403 | * call that function explicitly. This function just makes | |
3404 | * a quick pass over the currently-known procinfos. | |
3405 | * | |
3406 | * Arguments: | |
3407 | * pi - parent process procinfo | |
3408 | * func - per-thread function | |
3409 | * ptr - opaque parameter for function. | |
3410 | * | |
3411 | * Return: | |
3412 | * First non-zero return value from the callee, or zero. | |
3413 | */ | |
3414 | ||
3415 | int | |
d0849a9a KB |
3416 | proc_iterate_over_threads (procinfo *pi, |
3417 | int (*func) (procinfo *, procinfo *, void *), | |
3418 | void *ptr) | |
c906108c | 3419 | { |
c3f6f71d JM |
3420 | procinfo *thread, *next; |
3421 | int retval = 0; | |
c906108c | 3422 | |
c3f6f71d JM |
3423 | /* |
3424 | * We should never have to apply this operation to any procinfo | |
3425 | * except the one for the main process. If that ever changes | |
3426 | * for any reason, then take out the following clause and | |
3427 | * replace it with one that makes sure the ctl_fd is open. | |
3428 | */ | |
3429 | ||
3430 | if (pi->tid != 0) | |
3431 | pi = find_procinfo_or_die (pi->pid, 0); | |
3432 | ||
3433 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3434 | { |
c3f6f71d JM |
3435 | next = thread->next; /* in case thread is destroyed */ |
3436 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3437 | break; | |
c906108c | 3438 | } |
c3f6f71d JM |
3439 | |
3440 | return retval; | |
c906108c SS |
3441 | } |
3442 | ||
c3f6f71d JM |
3443 | /* =================== END, Thread "MODULE" =================== */ |
3444 | ||
3445 | /* =================== END, /proc "MODULE" =================== */ | |
3446 | ||
3447 | /* =================== GDB "MODULE" =================== */ | |
3448 | ||
3449 | /* | |
3450 | * Here are all of the gdb target vector functions and their friends. | |
3451 | */ | |
3452 | ||
a14ed312 KB |
3453 | static int do_attach (int pid); |
3454 | static void do_detach (int signo); | |
37de36c6 | 3455 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
c3f6f71d JM |
3456 | |
3457 | /* | |
3458 | * Function: procfs_debug_inferior | |
3459 | * | |
3460 | * Sets up the inferior to be debugged. | |
3461 | * Registers to trace signals, hardware faults, and syscalls. | |
3462 | * Note: does not set RLC flag: caller may want to customize that. | |
3463 | * | |
3464 | * Returns: zero for success (note! unlike most functions in this module) | |
3465 | * On failure, returns the LINE NUMBER where it failed! | |
3466 | */ | |
3467 | ||
3468 | static int | |
fba45db2 | 3469 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3470 | { |
c3f6f71d | 3471 | fltset_t traced_faults; |
37de36c6 KB |
3472 | gdb_sigset_t traced_signals; |
3473 | sysset_t *traced_syscall_entries; | |
3474 | sysset_t *traced_syscall_exits; | |
3475 | int status; | |
c906108c | 3476 | |
c3f6f71d JM |
3477 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3478 | /* On some systems (OSF), we don't trace hardware faults. | |
3479 | Apparently it's enough that we catch them as signals. | |
3480 | Wonder why we don't just do that in general? */ | |
3481 | premptyset (&traced_faults); /* don't trace faults. */ | |
3482 | #else | |
3483 | /* Register to trace hardware faults in the child. */ | |
3484 | prfillset (&traced_faults); /* trace all faults... */ | |
3485 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3486 | #endif | |
3487 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3488 | return __LINE__; | |
c906108c | 3489 | |
c3f6f71d JM |
3490 | /* Register to trace selected signals in the child. */ |
3491 | premptyset (&traced_signals); | |
3492 | if (!register_gdb_signals (pi, &traced_signals)) | |
3493 | return __LINE__; | |
3494 | ||
37de36c6 | 3495 | |
c3f6f71d | 3496 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3497 | traced_syscall_entries = sysset_t_alloc (pi); |
3498 | gdb_premptysysset (traced_syscall_entries); | |
3499 | #ifdef SYS_exit | |
3500 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3501 | #endif | |
c3f6f71d | 3502 | #ifdef SYS_lwpexit |
37de36c6 | 3503 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3504 | #endif |
3505 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3506 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3507 | #endif | |
3508 | #ifdef DYNAMIC_SYSCALLS | |
3509 | { | |
3510 | int callnum = find_syscall (pi, "_exit"); | |
3511 | if (callnum >= 0) | |
3512 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3513 | } | |
c906108c SS |
3514 | #endif |
3515 | ||
37de36c6 KB |
3516 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3517 | xfree (traced_syscall_entries); | |
3518 | if (!status) | |
c3f6f71d JM |
3519 | return __LINE__; |
3520 | ||
3521 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3522 | /* OSF method for tracing exec syscalls. Quoting: | |
3523 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3524 | exits from exec system calls because of the user level loader. */ | |
3525 | /* FIXME: make nice and maybe move into an access function. */ | |
3526 | { | |
3527 | int prfs_flags; | |
3528 | ||
3529 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3530 | return __LINE__; | |
3531 | ||
3532 | prfs_flags |= PRFS_STOPEXEC; | |
3533 | ||
3534 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3535 | return __LINE__; | |
3536 | } | |
3537 | #else /* not PRFS_STOPEXEC */ | |
3538 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3539 | /* GW: Rationale... | |
3540 | Not all systems with /proc have all the exec* syscalls with the same | |
3541 | names. On the SGI, for example, there is no SYS_exec, but there | |
3542 | *is* a SYS_execv. So, we try to account for that. */ | |
3543 | ||
37de36c6 KB |
3544 | traced_syscall_exits = sysset_t_alloc (pi); |
3545 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3546 | #ifdef SYS_exec |
37de36c6 | 3547 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3548 | #endif |
3549 | #ifdef SYS_execve | |
37de36c6 | 3550 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3551 | #endif |
3552 | #ifdef SYS_execv | |
37de36c6 | 3553 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3554 | #endif |
c5aa993b | 3555 | |
c3f6f71d | 3556 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3557 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3558 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3559 | #endif |
c5aa993b | 3560 | |
c3f6f71d | 3561 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3562 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3563 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3564 | #endif |
c5aa993b | 3565 | |
37de36c6 KB |
3566 | #ifdef DYNAMIC_SYSCALLS |
3567 | { | |
3568 | int callnum = find_syscall (pi, "execve"); | |
3569 | if (callnum >= 0) | |
3570 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3571 | callnum = find_syscall (pi, "ra_execve"); | |
3572 | if (callnum >= 0) | |
3573 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3574 | } | |
3575 | #endif | |
c906108c | 3576 | |
37de36c6 KB |
3577 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3578 | xfree (traced_syscall_exits); | |
3579 | if (!status) | |
c3f6f71d JM |
3580 | return __LINE__; |
3581 | ||
3582 | #endif /* PRFS_STOPEXEC */ | |
3583 | return 0; | |
c906108c SS |
3584 | } |
3585 | ||
c3f6f71d | 3586 | static void |
fba45db2 | 3587 | procfs_attach (char *args, int from_tty) |
c906108c | 3588 | { |
c3f6f71d JM |
3589 | char *exec_file; |
3590 | int pid; | |
3591 | ||
3592 | if (!args) | |
3593 | error_no_arg ("process-id to attach"); | |
3594 | ||
3595 | pid = atoi (args); | |
3596 | if (pid == getpid ()) | |
3597 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3598 | |
c3f6f71d | 3599 | if (from_tty) |
c906108c | 3600 | { |
c3f6f71d JM |
3601 | exec_file = get_exec_file (0); |
3602 | ||
3603 | if (exec_file) | |
3604 | printf_filtered ("Attaching to program `%s', %s\n", | |
3605 | exec_file, target_pid_to_str (pid)); | |
3606 | else | |
3607 | printf_filtered ("Attaching to %s\n", target_pid_to_str (pid)); | |
3608 | ||
3609 | fflush (stdout); | |
c906108c | 3610 | } |
c3f6f71d JM |
3611 | inferior_pid = do_attach (pid); |
3612 | push_target (&procfs_ops); | |
3613 | } | |
3614 | ||
3615 | static void | |
fba45db2 | 3616 | procfs_detach (char *args, int from_tty) |
c3f6f71d JM |
3617 | { |
3618 | char *exec_file; | |
3619 | int signo = 0; | |
3620 | ||
3621 | if (from_tty) | |
c906108c | 3622 | { |
c3f6f71d JM |
3623 | exec_file = get_exec_file (0); |
3624 | if (exec_file == 0) | |
3625 | exec_file = ""; | |
3626 | printf_filtered ("Detaching from program: %s %s\n", | |
3627 | exec_file, target_pid_to_str (inferior_pid)); | |
3628 | fflush (stdout); | |
c906108c | 3629 | } |
c3f6f71d JM |
3630 | if (args) |
3631 | signo = atoi (args); | |
3632 | ||
3633 | do_detach (signo); | |
3634 | inferior_pid = 0; | |
3635 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ | |
c906108c SS |
3636 | } |
3637 | ||
c3f6f71d | 3638 | static int |
fba45db2 | 3639 | do_attach (int pid) |
c906108c | 3640 | { |
c3f6f71d JM |
3641 | procinfo *pi; |
3642 | int fail; | |
3643 | ||
3644 | if ((pi = create_procinfo (pid, 0)) == NULL) | |
3645 | perror ("procfs: out of memory in 'attach'"); | |
3646 | ||
3647 | if (!open_procinfo_files (pi, FD_CTL)) | |
3648 | { | |
3649 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3650 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
3651 | pid); | |
3652 | dead_procinfo (pi, errmsg, NOKILL); | |
3653 | } | |
c906108c | 3654 | |
c3f6f71d JM |
3655 | /* Stop the process (if it isn't already stopped). */ |
3656 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3657 | { |
c3f6f71d JM |
3658 | pi->was_stopped = 1; |
3659 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3660 | } |
3661 | else | |
3662 | { | |
c3f6f71d JM |
3663 | pi->was_stopped = 0; |
3664 | /* Set the process to run again when we close it. */ | |
3665 | if (!proc_set_run_on_last_close (pi)) | |
3666 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3667 | ||
3668 | /* Now stop the process. */ | |
3669 | if (!proc_stop_process (pi)) | |
3670 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3671 | pi->ignore_next_sigstop = 1; | |
c906108c | 3672 | } |
c3f6f71d JM |
3673 | /* Save some of the /proc state to be restored if we detach. */ |
3674 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3675 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3676 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3677 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3678 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3679 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3680 | NOKILL); | |
37de36c6 | 3681 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3682 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
3683 | NOKILL); | |
3684 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3685 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3686 | ||
3687 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3688 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3689 | ||
3690 | /* Let GDB know that the inferior was attached. */ | |
3691 | attach_flag = 1; | |
3692 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3693 | } |
3694 | ||
3695 | static void | |
fba45db2 | 3696 | do_detach (int signo) |
c906108c | 3697 | { |
c3f6f71d | 3698 | procinfo *pi; |
c906108c | 3699 | |
c3f6f71d JM |
3700 | /* Find procinfo for the main process */ |
3701 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); /* FIXME: threads */ | |
3702 | if (signo) | |
3703 | if (!proc_set_current_signal (pi, signo)) | |
3704 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3705 | |
c3f6f71d JM |
3706 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3707 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3708 | |
c3f6f71d JM |
3709 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3710 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3711 | ||
37de36c6 | 3712 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3713 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3714 | ||
37de36c6 | 3715 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3716 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3717 | ||
3718 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3719 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3720 | ||
3721 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3722 | if (signo || !(pi->was_stopped) || | |
3723 | query ("Was stopped when attached, make it runnable again? ")) | |
3724 | { | |
3725 | /* Clear any pending signal. */ | |
3726 | if (!proc_clear_current_fault (pi)) | |
3727 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3728 | ||
3729 | if (!proc_set_run_on_last_close (pi)) | |
3730 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3731 | } | |
3732 | ||
3733 | attach_flag = 0; | |
3734 | destroy_procinfo (pi); | |
c906108c SS |
3735 | } |
3736 | ||
c3f6f71d JM |
3737 | /* |
3738 | * fetch_registers | |
3739 | * | |
3740 | * Since the /proc interface cannot give us individual registers, | |
3741 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3742 | * This results in the possibility that we will do unnecessarily many | |
3743 | * fetches, since we may be called repeatedly for individual registers. | |
3744 | * So we cache the results, and mark the cache invalid when the process | |
3745 | * is resumed. | |
3746 | */ | |
3747 | ||
c906108c | 3748 | static void |
fba45db2 | 3749 | procfs_fetch_registers (int regno) |
c906108c | 3750 | { |
c3f6f71d JM |
3751 | gdb_fpregset_t *fpregs; |
3752 | gdb_gregset_t *gregs; | |
3753 | procinfo *pi; | |
3754 | int pid; | |
3755 | int tid; | |
c906108c | 3756 | |
c3f6f71d JM |
3757 | pid = PIDGET (inferior_pid); |
3758 | tid = TIDGET (inferior_pid); | |
3759 | ||
3760 | /* First look up procinfo for the main process. */ | |
3761 | pi = find_procinfo_or_die (pid, 0); | |
3762 | ||
3763 | /* If the event thread is not the same as GDB's requested thread | |
3764 | (ie. inferior_pid), then look up procinfo for the requested | |
3765 | thread. */ | |
3766 | if ((tid != 0) && | |
3767 | (tid != proc_get_current_thread (pi))) | |
3768 | pi = find_procinfo_or_die (pid, tid); | |
3769 | ||
3770 | if (pi == NULL) | |
3771 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
3772 | target_pid_to_str (inferior_pid)); | |
3773 | ||
3774 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3775 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3776 | ||
3777 | supply_gregset (gregs); | |
3778 | ||
60054393 MS |
3779 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3780 | { | |
3781 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3782 | regno == PC_REGNUM || | |
3783 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3784 | regno == FP_REGNUM || | |
3785 | regno == SP_REGNUM) | |
3786 | return; /* not a floating point register */ | |
c5aa993b | 3787 | |
60054393 MS |
3788 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3789 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3790 | |
60054393 MS |
3791 | supply_fpregset (fpregs); |
3792 | } | |
c906108c SS |
3793 | } |
3794 | ||
c3f6f71d JM |
3795 | /* Get ready to modify the registers array. On machines which store |
3796 | individual registers, this doesn't need to do anything. On | |
3797 | machines which store all the registers in one fell swoop, such as | |
3798 | /proc, this makes sure that registers contains all the registers | |
3799 | from the program being debugged. */ | |
3800 | ||
c906108c | 3801 | static void |
fba45db2 | 3802 | procfs_prepare_to_store (void) |
c906108c | 3803 | { |
c3f6f71d JM |
3804 | #ifdef CHILD_PREPARE_TO_STORE |
3805 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3806 | #endif |
c906108c SS |
3807 | } |
3808 | ||
3809 | /* | |
c3f6f71d JM |
3810 | * store_registers |
3811 | * | |
3812 | * Since the /proc interface will not read individual registers, | |
3813 | * we will cache these requests until the process is resumed, and | |
3814 | * only then write them back to the inferior process. | |
3815 | * | |
3816 | * FIXME: is that a really bad idea? Have to think about cases | |
3817 | * where writing one register might affect the value of others, etc. | |
3818 | */ | |
c906108c | 3819 | |
c3f6f71d | 3820 | static void |
fba45db2 | 3821 | procfs_store_registers (int regno) |
c3f6f71d JM |
3822 | { |
3823 | gdb_fpregset_t *fpregs; | |
3824 | gdb_gregset_t *gregs; | |
3825 | procinfo *pi; | |
3826 | int pid; | |
3827 | int tid; | |
c906108c | 3828 | |
c3f6f71d JM |
3829 | pid = PIDGET (inferior_pid); |
3830 | tid = TIDGET (inferior_pid); | |
c906108c | 3831 | |
c3f6f71d JM |
3832 | /* First find procinfo for main process */ |
3833 | pi = find_procinfo_or_die (pid, 0); | |
3834 | ||
3835 | /* If current lwp for process is not the same as requested thread | |
3836 | (ie. inferior_pid), then find procinfo for the requested thread. */ | |
3837 | ||
3838 | if ((tid != 0) && | |
3839 | (tid != proc_get_current_thread (pi))) | |
3840 | pi = find_procinfo_or_die (pid, tid); | |
3841 | ||
3842 | if (pi == NULL) | |
3843 | error ("procfs: store_registers: failed to find procinfo for %s", | |
3844 | target_pid_to_str (inferior_pid)); | |
c906108c | 3845 | |
c3f6f71d JM |
3846 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3847 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3848 | |
c3f6f71d JM |
3849 | fill_gregset (gregs, regno); |
3850 | if (!proc_set_gregs (pi)) | |
3851 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3852 | |
60054393 MS |
3853 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3854 | { | |
3855 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3856 | regno == PC_REGNUM || | |
3857 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3858 | regno == FP_REGNUM || | |
3859 | regno == SP_REGNUM) | |
3860 | return; /* not a floating point register */ | |
3861 | ||
3862 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3863 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3864 | ||
3865 | fill_fpregset (fpregs, regno); | |
3866 | if (!proc_set_fpregs (pi)) | |
3867 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3868 | } | |
c3f6f71d | 3869 | } |
c906108c | 3870 | |
37de36c6 KB |
3871 | static int |
3872 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3873 | { | |
3874 | ||
3875 | #ifdef SYS_lwp_exit | |
3876 | if (scall == SYS_lwp_exit) | |
3877 | return 1; | |
3878 | #endif | |
3879 | #ifdef SYS_lwpexit | |
3880 | if (scall == SYS_lwpexit) | |
3881 | return 1; | |
3882 | #endif | |
3883 | return 0; | |
3884 | } | |
3885 | ||
3886 | static int | |
3887 | syscall_is_exit (procinfo *pi, int scall) | |
3888 | { | |
3889 | #ifdef SYS_exit | |
3890 | if (scall == SYS_exit) | |
3891 | return 1; | |
3892 | #endif | |
3893 | #ifdef DYNAMIC_SYSCALLS | |
3894 | if (find_syscall (pi, "_exit") == scall) | |
3895 | return 1; | |
3896 | #endif | |
3897 | return 0; | |
3898 | } | |
3899 | ||
3900 | static int | |
3901 | syscall_is_exec (procinfo *pi, int scall) | |
3902 | { | |
3903 | #ifdef SYS_exec | |
3904 | if (scall == SYS_exec) | |
3905 | return 1; | |
3906 | #endif | |
3907 | #ifdef SYS_execv | |
3908 | if (scall == SYS_execv) | |
3909 | return 1; | |
3910 | #endif | |
3911 | #ifdef SYS_execve | |
3912 | if (scall == SYS_execve) | |
3913 | return 1; | |
3914 | #endif | |
3915 | #ifdef DYNAMIC_SYSCALLS | |
3916 | if (find_syscall (pi, "_execve")) | |
3917 | return 1; | |
3918 | if (find_syscall (pi, "ra_execve")) | |
3919 | return 1; | |
3920 | #endif | |
3921 | return 0; | |
3922 | } | |
3923 | ||
3924 | static int | |
3925 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3926 | { | |
3927 | #ifdef SYS_lwp_create | |
3928 | if (scall == SYS_lwp_create) | |
3929 | return 1; | |
3930 | #endif | |
3931 | #ifdef SYS_lwpcreate | |
3932 | if (scall == SYS_lwpcreate) | |
3933 | return 1; | |
3934 | #endif | |
3935 | return 0; | |
3936 | } | |
3937 | ||
c3f6f71d JM |
3938 | /* |
3939 | * Function: target_wait | |
3940 | * | |
3941 | * Retrieve the next stop event from the child process. | |
3942 | * If child has not stopped yet, wait for it to stop. | |
3943 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3944 | * into gdb internal event codes. | |
3945 | * | |
3946 | * Return: id of process (and possibly thread) that incurred the event. | |
3947 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3948 | */ |
3949 | ||
c3f6f71d | 3950 | static int |
fba45db2 | 3951 | procfs_wait (int pid, struct target_waitstatus *status) |
c906108c | 3952 | { |
c3f6f71d JM |
3953 | /* First cut: loosely based on original version 2.1 */ |
3954 | procinfo *pi; | |
3955 | int temp, wstat; | |
3956 | int retval; | |
3957 | int why, what, flags; | |
3958 | int retry = 0; | |
c906108c | 3959 | |
c3f6f71d | 3960 | wait_again: |
c906108c | 3961 | |
c3f6f71d JM |
3962 | retry++; |
3963 | wstat = 0; | |
3964 | retval = -1; | |
c906108c | 3965 | |
c3f6f71d JM |
3966 | /* Find procinfo for main process */ |
3967 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
3968 | if (pi) | |
c906108c | 3969 | { |
c3f6f71d JM |
3970 | /* We must assume that the status is stale now... */ |
3971 | pi->status_valid = 0; | |
3972 | pi->gregs_valid = 0; | |
3973 | pi->fpregs_valid = 0; | |
3974 | ||
3975 | #if 0 /* just try this out... */ | |
3976 | flags = proc_flags (pi); | |
3977 | why = proc_why (pi); | |
3978 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3979 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3980 | #endif | |
3981 | /* If child is not stopped, wait for it to stop. */ | |
3982 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3983 | !proc_wait_for_stop (pi)) | |
c906108c | 3984 | { |
c3f6f71d JM |
3985 | /* wait_for_stop failed: has the child terminated? */ |
3986 | if (errno == ENOENT) | |
c906108c | 3987 | { |
c3f6f71d JM |
3988 | /* /proc file not found; presumably child has terminated. */ |
3989 | retval = wait (&wstat); /* "wait" for the child's exit */ | |
3990 | ||
3991 | if (retval != PIDGET (inferior_pid)) /* wrong child? */ | |
3992 | error ("procfs: couldn't stop process %d: wait returned %d\n", | |
3993 | inferior_pid, retval); | |
3994 | /* FIXME: might I not just use waitpid? | |
3995 | Or try find_procinfo to see if I know about this child? */ | |
c906108c | 3996 | } |
d1566ff5 FN |
3997 | else if (errno == EINTR) |
3998 | goto wait_again; | |
c3f6f71d | 3999 | else |
c906108c | 4000 | { |
c3f6f71d JM |
4001 | /* Unknown error from wait_for_stop. */ |
4002 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 4003 | } |
c3f6f71d JM |
4004 | } |
4005 | else | |
4006 | { | |
4007 | /* This long block is reached if either: | |
4008 | a) the child was already stopped, or | |
4009 | b) we successfully waited for the child with wait_for_stop. | |
4010 | This block will analyze the /proc status, and translate it | |
4011 | into a waitstatus for GDB. | |
4012 | ||
4013 | If we actually had to call wait because the /proc file | |
4014 | is gone (child terminated), then we skip this block, | |
4015 | because we already have a waitstatus. */ | |
4016 | ||
4017 | flags = proc_flags (pi); | |
4018 | why = proc_why (pi); | |
4019 | what = proc_what (pi); | |
4020 | ||
c3f6f71d | 4021 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4022 | { |
c3f6f71d JM |
4023 | #ifdef PR_ASYNC |
4024 | /* If it's running async (for single_thread control), | |
4025 | set it back to normal again. */ | |
4026 | if (flags & PR_ASYNC) | |
4027 | if (!proc_unset_async (pi)) | |
4028 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
4029 | #endif | |
4030 | ||
4031 | if (info_verbose) | |
4032 | proc_prettyprint_why (why, what, 1); | |
4033 | ||
4034 | /* The 'pid' we will return to GDB is composed of | |
4035 | the process ID plus the lwp ID. */ | |
4036 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
4037 | ||
4038 | switch (why) { | |
4039 | case PR_SIGNALLED: | |
4040 | wstat = (what << 8) | 0177; | |
4041 | break; | |
4042 | case PR_SYSENTRY: | |
37de36c6 | 4043 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 4044 | { |
37de36c6 KB |
4045 | printf_filtered ("[%s exited]\n", |
4046 | target_pid_to_str (retval)); | |
4047 | delete_thread (retval); | |
4048 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4049 | return retval; | |
4050 | } | |
4051 | else if (syscall_is_exit (pi, what)) | |
4052 | { | |
4053 | /* Handle SYS_exit call only */ | |
4054 | /* Stopped at entry to SYS_exit. | |
4055 | Make it runnable, resume it, then use | |
4056 | the wait system call to get its exit code. | |
4057 | Proc_run_process always clears the current | |
4058 | fault and signal. | |
4059 | Then return its exit status. */ | |
4060 | pi->status_valid = 0; | |
4061 | wstat = 0; | |
4062 | /* FIXME: what we should do is return | |
4063 | TARGET_WAITKIND_SPURIOUS. */ | |
4064 | if (!proc_run_process (pi, 0, 0)) | |
4065 | proc_error (pi, "target_wait, run_process", __LINE__); | |
4066 | if (attach_flag) | |
c3f6f71d | 4067 | { |
37de36c6 KB |
4068 | /* Don't call wait: simulate waiting for exit, |
4069 | return a "success" exit code. Bogus: what if | |
4070 | it returns something else? */ | |
4071 | wstat = 0; | |
4072 | retval = inferior_pid; /* ? ? ? */ | |
4073 | } | |
4074 | else | |
4075 | { | |
4076 | int temp = wait (&wstat); | |
4077 | ||
4078 | /* FIXME: shouldn't I make sure I get the right | |
4079 | event from the right process? If (for | |
4080 | instance) I have killed an earlier inferior | |
4081 | process but failed to clean up after it | |
4082 | somehow, I could get its termination event | |
4083 | here. */ | |
4084 | ||
4085 | /* If wait returns -1, that's what we return to GDB. */ | |
4086 | if (temp < 0) | |
4087 | retval = temp; | |
c3f6f71d | 4088 | } |
c3f6f71d | 4089 | } |
37de36c6 KB |
4090 | else |
4091 | { | |
4092 | printf_filtered ("procfs: trapped on entry to "); | |
4093 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4094 | printf_filtered ("\n"); | |
4095 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4096 | { |
37de36c6 | 4097 | long i, nsysargs, *sysargs; |
c3f6f71d | 4098 | |
37de36c6 KB |
4099 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4100 | (sysargs = proc_sysargs (pi)) != NULL) | |
4101 | { | |
4102 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4103 | for (i = 0; i < nsysargs; i++) | |
4104 | printf_filtered ("#%ld: 0x%08lx\n", | |
4105 | i, sysargs[i]); | |
4106 | } | |
c3f6f71d | 4107 | |
c3f6f71d | 4108 | } |
c3f6f71d | 4109 | #endif |
37de36c6 KB |
4110 | if (status) |
4111 | { | |
4112 | /* How to exit gracefully, returning "unknown event" */ | |
4113 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4114 | return inferior_pid; | |
4115 | } | |
4116 | else | |
4117 | { | |
4118 | /* How to keep going without returning to wfi: */ | |
4119 | target_resume (pid, 0, TARGET_SIGNAL_0); | |
4120 | goto wait_again; | |
4121 | } | |
4122 | } | |
4123 | break; | |
4124 | case PR_SYSEXIT: | |
4125 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4126 | { |
37de36c6 KB |
4127 | /* Hopefully this is our own "fork-child" execing |
4128 | the real child. Hoax this event into a trap, and | |
4129 | GDB will see the child about to execute its start | |
4130 | address. */ | |
4131 | wstat = (SIGTRAP << 8) | 0177; | |
4132 | } | |
4133 | else if (syscall_is_lwp_create (pi, what)) | |
4134 | { | |
4135 | /* | |
4136 | * This syscall is somewhat like fork/exec. | |
4137 | * We will get the event twice: once for the parent LWP, | |
4138 | * and once for the child. We should already know about | |
4139 | * the parent LWP, but the child will be new to us. So, | |
4140 | * whenever we get this event, if it represents a new | |
4141 | * thread, simply add the thread to the list. | |
4142 | */ | |
c3f6f71d | 4143 | |
37de36c6 KB |
4144 | /* If not in procinfo list, add it. */ |
4145 | temp = proc_get_current_thread (pi); | |
4146 | if (!find_procinfo (pi->pid, temp)) | |
4147 | create_procinfo (pi->pid, temp); | |
4148 | ||
4149 | temp = MERGEPID (pi->pid, temp); | |
4150 | /* If not in GDB's thread list, add it. */ | |
4151 | if (!in_thread_list (temp)) | |
c3f6f71d | 4152 | { |
37de36c6 KB |
4153 | printf_filtered ("[New %s]\n", target_pid_to_str (temp)); |
4154 | add_thread (temp); | |
c3f6f71d | 4155 | } |
37de36c6 KB |
4156 | /* Return to WFI, but tell it to immediately resume. */ |
4157 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4158 | return inferior_pid; | |
4159 | } | |
4160 | else if (syscall_is_lwp_exit (pi, what)) | |
4161 | { | |
4162 | printf_filtered ("[%s exited]\n", | |
4163 | target_pid_to_str (retval)); | |
4164 | delete_thread (retval); | |
4165 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4166 | return retval; | |
c3f6f71d | 4167 | } |
37de36c6 KB |
4168 | else if (0) |
4169 | { | |
4170 | /* FIXME: Do we need to handle SYS_sproc, | |
4171 | SYS_fork, or SYS_vfork here? The old procfs | |
4172 | seemed to use this event to handle threads on | |
4173 | older (non-LWP) systems, where I'm assuming | |
4174 | that threads were actually separate processes. | |
4175 | Irix, maybe? Anyway, low priority for now. */ | |
4176 | } | |
4177 | else | |
4178 | { | |
4179 | printf_filtered ("procfs: trapped on exit from "); | |
4180 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4181 | printf_filtered ("\n"); | |
4182 | #ifndef PIOCSSPCACT | |
4183 | { | |
4184 | long i, nsysargs, *sysargs; | |
4185 | ||
4186 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4187 | (sysargs = proc_sysargs (pi)) != NULL) | |
4188 | { | |
4189 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4190 | for (i = 0; i < nsysargs; i++) | |
4191 | printf_filtered ("#%ld: 0x%08lx\n", | |
4192 | i, sysargs[i]); | |
4193 | } | |
4194 | } | |
c3f6f71d | 4195 | #endif |
37de36c6 KB |
4196 | status->kind = TARGET_WAITKIND_SPURIOUS; |
4197 | return inferior_pid; | |
4198 | } | |
c3f6f71d JM |
4199 | break; |
4200 | case PR_REQUESTED: | |
4201 | #if 0 /* FIXME */ | |
4202 | wstat = (SIGSTOP << 8) | 0177; | |
4203 | break; | |
4204 | #else | |
4205 | if (retry < 5) | |
4206 | { | |
4207 | printf_filtered ("Retry #%d:\n", retry); | |
4208 | pi->status_valid = 0; | |
4209 | goto wait_again; | |
4210 | } | |
4211 | else | |
4212 | { | |
4213 | /* If not in procinfo list, add it. */ | |
4214 | temp = proc_get_current_thread (pi); | |
4215 | if (!find_procinfo (pi->pid, temp)) | |
4216 | create_procinfo (pi->pid, temp); | |
4217 | ||
4218 | /* If not in GDB's thread list, add it. */ | |
4219 | temp = MERGEPID (pi->pid, temp); | |
4220 | if (!in_thread_list (temp)) | |
4221 | { | |
0d06e24b | 4222 | printf_filtered ("[New %s]\n", |
c3f6f71d JM |
4223 | target_pid_to_str (temp)); |
4224 | add_thread (temp); | |
4225 | } | |
4226 | ||
4227 | status->kind = TARGET_WAITKIND_STOPPED; | |
4228 | status->value.sig = 0; | |
4229 | return retval; | |
4230 | } | |
4231 | #endif | |
4232 | case PR_JOBCONTROL: | |
4233 | wstat = (what << 8) | 0177; | |
4234 | break; | |
4235 | case PR_FAULTED: | |
4236 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
4237 | #ifdef FLTWATCH | |
4238 | case FLTWATCH: | |
4239 | wstat = (SIGTRAP << 8) | 0177; | |
4240 | break; | |
4241 | #endif | |
4242 | #ifdef FLTKWATCH | |
4243 | case FLTKWATCH: | |
4244 | wstat = (SIGTRAP << 8) | 0177; | |
4245 | break; | |
4246 | #endif | |
4247 | /* FIXME: use si_signo where possible. */ | |
4248 | case FLTPRIV: | |
4249 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4250 | case FLTILL: | |
4251 | #endif | |
4252 | wstat = (SIGILL << 8) | 0177; | |
4253 | break; | |
4254 | case FLTBPT: | |
4255 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4256 | case FLTTRACE: | |
4257 | #endif | |
4258 | wstat = (SIGTRAP << 8) | 0177; | |
4259 | break; | |
4260 | case FLTSTACK: | |
4261 | case FLTACCESS: | |
4262 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4263 | case FLTBOUNDS: | |
4264 | #endif | |
4265 | wstat = (SIGSEGV << 8) | 0177; | |
4266 | break; | |
4267 | case FLTIOVF: | |
4268 | case FLTIZDIV: | |
4269 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4270 | case FLTFPE: | |
4271 | #endif | |
4272 | wstat = (SIGFPE << 8) | 0177; | |
4273 | break; | |
4274 | case FLTPAGE: /* Recoverable page fault */ | |
4275 | default: /* FIXME: use si_signo if possible for fault */ | |
4276 | retval = -1; | |
4277 | printf_filtered ("procfs:%d -- ", __LINE__); | |
4278 | printf_filtered ("child stopped for unknown reason:\n"); | |
4279 | proc_prettyprint_why (why, what, 1); | |
4280 | error ("... giving up..."); | |
4281 | break; | |
4282 | } | |
4283 | break; /* case PR_FAULTED: */ | |
4284 | default: /* switch (why) unmatched */ | |
4285 | printf_filtered ("procfs:%d -- ", __LINE__); | |
4286 | printf_filtered ("child stopped for unknown reason:\n"); | |
4287 | proc_prettyprint_why (why, what, 1); | |
4288 | error ("... giving up..."); | |
4289 | break; | |
4290 | } | |
4291 | /* | |
4292 | * Got this far without error: | |
4293 | * If retval isn't in the threads database, add it. | |
4294 | */ | |
4295 | if (retval > 0 && | |
4296 | retval != inferior_pid && | |
4297 | !in_thread_list (retval)) | |
c906108c | 4298 | { |
c3f6f71d JM |
4299 | /* |
4300 | * We have a new thread. | |
4301 | * We need to add it both to GDB's list and to our own. | |
4302 | * If we don't create a procinfo, resume may be unhappy | |
4303 | * later. | |
4304 | */ | |
4305 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
4306 | add_thread (retval); | |
4307 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4308 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
4309 | ||
4310 | /* In addition, it's possible that this is the first | |
4311 | * new thread we've seen, in which case we may not | |
4312 | * have created entries for inferior_pid yet. | |
4313 | */ | |
4314 | if (TIDGET (inferior_pid) != 0) | |
4315 | { | |
4316 | if (!in_thread_list (inferior_pid)) | |
4317 | add_thread (inferior_pid); | |
4318 | if (find_procinfo (PIDGET (inferior_pid), | |
4319 | TIDGET (inferior_pid)) == NULL) | |
4320 | create_procinfo (PIDGET (inferior_pid), | |
4321 | TIDGET (inferior_pid)); | |
4322 | } | |
c906108c | 4323 | } |
c906108c | 4324 | } |
c3f6f71d | 4325 | else /* flags do not indicate STOPPED */ |
c906108c | 4326 | { |
c3f6f71d JM |
4327 | /* surely this can't happen... */ |
4328 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4329 | __LINE__); | |
4330 | proc_prettyprint_flags (flags, 1); | |
4331 | error ("procfs: ...giving up..."); | |
c906108c | 4332 | } |
c906108c | 4333 | } |
c906108c | 4334 | |
c3f6f71d JM |
4335 | if (status) |
4336 | store_waitstatus (status, wstat); | |
c906108c SS |
4337 | } |
4338 | ||
c3f6f71d JM |
4339 | return retval; |
4340 | } | |
c906108c | 4341 | |
d0849a9a KB |
4342 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4343 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4344 | otherwise transfer them from the target. TARGET is unused. | |
4345 | ||
4346 | The return value is 0 if an error occurred or no bytes were | |
4347 | transferred. Otherwise, it will be a positive value which | |
4348 | indicates the number of bytes transferred between gdb and the | |
4349 | target. (Note that the interface also makes provisions for | |
4350 | negative values, but this capability isn't implemented here.) */ | |
4351 | ||
c3f6f71d | 4352 | static int |
d0849a9a | 4353 | procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite, |
37de36c6 | 4354 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4355 | { |
4356 | procinfo *pi; | |
4357 | int nbytes = 0; | |
c906108c | 4358 | |
c3f6f71d JM |
4359 | /* Find procinfo for main process */ |
4360 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4361 | if (pi->as_fd == 0 && | |
4362 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4363 | { |
c3f6f71d JM |
4364 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4365 | return 0; | |
c906108c | 4366 | } |
c906108c | 4367 | |
c3f6f71d | 4368 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4369 | { |
c3f6f71d | 4370 | if (dowrite) |
c906108c | 4371 | { |
c3f6f71d JM |
4372 | #ifdef NEW_PROC_API |
4373 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4374 | #else |
c3f6f71d | 4375 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4376 | #endif |
c3f6f71d | 4377 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4378 | } |
c3f6f71d | 4379 | else |
c906108c | 4380 | { |
c3f6f71d JM |
4381 | PROCFS_NOTE ("read memory: \n"); |
4382 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4383 | } |
c3f6f71d | 4384 | if (nbytes < 0) |
c906108c | 4385 | { |
c3f6f71d | 4386 | nbytes = 0; |
c906108c | 4387 | } |
c906108c | 4388 | } |
c3f6f71d | 4389 | return nbytes; |
c906108c SS |
4390 | } |
4391 | ||
4392 | /* | |
c3f6f71d JM |
4393 | * Function: invalidate_cache |
4394 | * | |
4395 | * Called by target_resume before making child runnable. | |
4396 | * Mark cached registers and status's invalid. | |
4397 | * If there are "dirty" caches that need to be written back | |
4398 | * to the child process, do that. | |
4399 | * | |
4400 | * File descriptors are also cached. | |
4401 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4402 | * However, as they are expensive to open, we don't want to throw them | |
4403 | * away indescriminately either. As a compromise, we will keep the | |
4404 | * file descriptors for the parent process, but discard any file | |
4405 | * descriptors we may have accumulated for the threads. | |
4406 | * | |
4407 | * Return value: | |
4408 | * As this function is called by iterate_over_threads, it always | |
4409 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
4410 | */ |
4411 | ||
c3f6f71d JM |
4412 | |
4413 | static int | |
fba45db2 | 4414 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4415 | { |
c3f6f71d JM |
4416 | /* |
4417 | * About to run the child; invalidate caches and do any other cleanup. | |
4418 | */ | |
c906108c | 4419 | |
c3f6f71d JM |
4420 | #if 0 |
4421 | if (pi->gregs_dirty) | |
4422 | if (parent == NULL || | |
4423 | proc_get_current_thread (parent) != pi->tid) | |
4424 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4425 | proc_warn (pi, "target_resume, set_gregs", | |
4426 | __LINE__); | |
60054393 MS |
4427 | if (FP0_REGNUM >= 0) |
4428 | if (pi->fpregs_dirty) | |
4429 | if (parent == NULL || | |
4430 | proc_get_current_thread (parent) != pi->tid) | |
4431 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4432 | proc_warn (pi, "target_resume, set_fpregs", | |
4433 | __LINE__); | |
c906108c | 4434 | #endif |
c906108c | 4435 | |
c3f6f71d | 4436 | if (parent != NULL) |
c906108c | 4437 | { |
c3f6f71d JM |
4438 | /* The presence of a parent indicates that this is an LWP. |
4439 | Close any file descriptors that it might have open. | |
4440 | We don't do this to the master (parent) procinfo. */ | |
4441 | ||
4442 | close_procinfo_files (pi); | |
c906108c | 4443 | } |
c3f6f71d JM |
4444 | pi->gregs_valid = 0; |
4445 | pi->fpregs_valid = 0; | |
4446 | #if 0 | |
4447 | pi->gregs_dirty = 0; | |
4448 | pi->fpregs_dirty = 0; | |
c906108c | 4449 | #endif |
c3f6f71d JM |
4450 | pi->status_valid = 0; |
4451 | pi->threads_valid = 0; | |
c906108c | 4452 | |
c3f6f71d | 4453 | return 0; |
c906108c SS |
4454 | } |
4455 | ||
0fda6bd2 | 4456 | #if 0 |
c906108c | 4457 | /* |
c3f6f71d JM |
4458 | * Function: make_signal_thread_runnable |
4459 | * | |
4460 | * A callback function for iterate_over_threads. | |
4461 | * Find the asynchronous signal thread, and make it runnable. | |
4462 | * See if that helps matters any. | |
c906108c SS |
4463 | */ |
4464 | ||
c3f6f71d | 4465 | static int |
fba45db2 | 4466 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4467 | { |
c3f6f71d JM |
4468 | #ifdef PR_ASLWP |
4469 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4470 | { |
c3f6f71d JM |
4471 | if (!proc_run_process (pi, 0, -1)) |
4472 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4473 | return 1; | |
c906108c | 4474 | } |
c906108c | 4475 | #endif |
c3f6f71d | 4476 | return 0; |
c906108c | 4477 | } |
0fda6bd2 | 4478 | #endif |
c906108c SS |
4479 | |
4480 | /* | |
c3f6f71d JM |
4481 | * Function: target_resume |
4482 | * | |
4483 | * Make the child process runnable. Normally we will then call | |
4484 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4485 | * | |
4486 | * Arguments: | |
4487 | * step: if true, then arrange for the child to stop again | |
4488 | * after executing a single instruction. | |
4489 | * signo: if zero, then cancel any pending signal. | |
4490 | * If non-zero, then arrange for the indicated signal | |
4491 | * to be delivered to the child when it runs. | |
4492 | * pid: if -1, then allow any child thread to run. | |
4493 | * if non-zero, then allow only the indicated thread to run. | |
4494 | ******* (not implemented yet) | |
c906108c SS |
4495 | */ |
4496 | ||
4497 | static void | |
fba45db2 | 4498 | procfs_resume (int pid, int step, enum target_signal signo) |
c906108c | 4499 | { |
c3f6f71d JM |
4500 | procinfo *pi, *thread; |
4501 | int native_signo; | |
4502 | ||
4503 | /* 2.1: | |
4504 | prrun.prflags |= PRSVADDR; | |
4505 | prrun.pr_vaddr = $PC; set resume address | |
4506 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4507 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4508 | prrun.prflags |= PRCFAULT; clear current fault. | |
4509 | ||
4510 | PRSTRACE and PRSFAULT can be done by other means | |
4511 | (proc_trace_signals, proc_trace_faults) | |
4512 | PRSVADDR is unnecessary. | |
4513 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4514 | This basically leaves PRSTEP and PRCSIG. | |
4515 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4516 | So basically PR_STEP is the sole argument that must be passed | |
4517 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4518 | ||
4519 | /* Find procinfo for main process */ | |
4520 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4521 | ||
4522 | /* First cut: ignore pid argument */ | |
4523 | errno = 0; | |
c906108c | 4524 | |
c3f6f71d JM |
4525 | /* Convert signal to host numbering. */ |
4526 | if (signo == 0 || | |
0fda6bd2 | 4527 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4528 | native_signo = 0; |
4529 | else | |
4530 | native_signo = target_signal_to_host (signo); | |
c906108c | 4531 | |
c3f6f71d | 4532 | pi->ignore_next_sigstop = 0; |
c906108c | 4533 | |
c3f6f71d JM |
4534 | /* Running the process voids all cached registers and status. */ |
4535 | /* Void the threads' caches first */ | |
4536 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4537 | /* Void the process procinfo's caches. */ | |
4538 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4539 | |
c3f6f71d | 4540 | if (pid != -1) |
c906108c | 4541 | { |
c3f6f71d JM |
4542 | /* Resume a specific thread, presumably suppressing the others. */ |
4543 | thread = find_procinfo (PIDGET (pid), TIDGET (pid)); | |
4544 | if (thread == NULL) | |
4545 | warning ("procfs: resume can't find thread %d -- resuming all.", | |
4546 | TIDGET (pid)); | |
4547 | else | |
c906108c | 4548 | { |
c3f6f71d JM |
4549 | if (thread->tid != 0) |
4550 | { | |
4551 | /* We're to resume a specific thread, and not the others. | |
4552 | * Set the child process's PR_ASYNC flag. | |
4553 | */ | |
4554 | #ifdef PR_ASYNC | |
4555 | if (!proc_set_async (pi)) | |
4556 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4557 | #endif | |
4558 | #if 0 | |
4559 | proc_iterate_over_threads (pi, | |
4560 | make_signal_thread_runnable, | |
4561 | NULL); | |
4562 | #endif | |
4563 | pi = thread; /* substitute the thread's procinfo for run */ | |
4564 | } | |
c906108c SS |
4565 | } |
4566 | } | |
c906108c | 4567 | |
c3f6f71d | 4568 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4569 | { |
c3f6f71d JM |
4570 | if (errno == EBUSY) |
4571 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4572 | else | |
4573 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4574 | } |
c3f6f71d | 4575 | } |
c906108c | 4576 | |
c3f6f71d JM |
4577 | /* |
4578 | * Function: register_gdb_signals | |
4579 | * | |
4580 | * Traverse the list of signals that GDB knows about | |
4581 | * (see "handle" command), and arrange for the target | |
4582 | * to be stopped or not, according to these settings. | |
4583 | * | |
4584 | * Returns non-zero for success, zero for failure. | |
4585 | */ | |
c906108c | 4586 | |
c3f6f71d | 4587 | static int |
37de36c6 | 4588 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4589 | { |
4590 | int signo; | |
c906108c | 4591 | |
c3f6f71d JM |
4592 | for (signo = 0; signo < NSIG; signo ++) |
4593 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4594 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4595 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4596 | prdelset (signals, signo); | |
4597 | else | |
4598 | praddset (signals, signo); | |
c906108c | 4599 | |
c3f6f71d | 4600 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4601 | } |
4602 | ||
4603 | /* | |
c3f6f71d JM |
4604 | * Function: target_notice_signals |
4605 | * | |
4606 | * Set up to trace signals in the child process. | |
4607 | */ | |
c906108c | 4608 | |
c3f6f71d | 4609 | static void |
fba45db2 | 4610 | procfs_notice_signals (int pid) |
c3f6f71d | 4611 | { |
37de36c6 | 4612 | gdb_sigset_t signals; |
c3f6f71d | 4613 | procinfo *pi = find_procinfo_or_die (PIDGET (pid), 0); |
c906108c | 4614 | |
c3f6f71d JM |
4615 | if (proc_get_traced_signals (pi, &signals) && |
4616 | register_gdb_signals (pi, &signals)) | |
4617 | return; | |
4618 | else | |
4619 | proc_error (pi, "notice_signals", __LINE__); | |
4620 | } | |
c906108c | 4621 | |
c3f6f71d JM |
4622 | /* |
4623 | * Function: target_files_info | |
4624 | * | |
4625 | * Print status information about the child process. | |
4626 | */ | |
c906108c | 4627 | |
c3f6f71d | 4628 | static void |
fba45db2 | 4629 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d JM |
4630 | { |
4631 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4632 | attach_flag? "attached": "child", | |
4633 | target_pid_to_str (inferior_pid)); | |
4634 | } | |
c906108c | 4635 | |
c3f6f71d JM |
4636 | /* |
4637 | * Function: target_open | |
4638 | * | |
4639 | * A dummy: you don't open procfs. | |
c906108c SS |
4640 | */ |
4641 | ||
4642 | static void | |
fba45db2 | 4643 | procfs_open (char *args, int from_tty) |
c906108c | 4644 | { |
c3f6f71d JM |
4645 | error ("Use the \"run\" command to start a Unix child process."); |
4646 | } | |
c906108c | 4647 | |
c3f6f71d JM |
4648 | /* |
4649 | * Function: target_can_run | |
4650 | * | |
4651 | * This tells GDB that this target vector can be invoked | |
4652 | * for "run" or "attach". | |
4653 | */ | |
c906108c | 4654 | |
c3f6f71d JM |
4655 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4656 | be a runnable target. Used by targets | |
4657 | that can sit atop procfs, such as solaris | |
4658 | thread support. */ | |
c906108c | 4659 | |
c906108c | 4660 | |
c3f6f71d | 4661 | static int |
fba45db2 | 4662 | procfs_can_run (void) |
c3f6f71d JM |
4663 | { |
4664 | /* This variable is controlled by modules that sit atop procfs that | |
4665 | may layer their own process structure atop that provided here. | |
4666 | sol-thread.c does this because of the Solaris two-level thread | |
4667 | model. */ | |
4668 | ||
4669 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4670 | |
c3f6f71d JM |
4671 | return !procfs_suppress_run; |
4672 | } | |
c906108c | 4673 | |
c3f6f71d JM |
4674 | /* |
4675 | * Function: target_stop | |
4676 | * | |
4677 | * Stop the child process asynchronously, as when the | |
4678 | * gdb user types control-c or presses a "stop" button. | |
4679 | * | |
4680 | * Works by sending kill(SIGINT) to the child's process group. | |
4681 | */ | |
c906108c | 4682 | |
c3f6f71d | 4683 | static void |
fba45db2 | 4684 | procfs_stop (void) |
c3f6f71d JM |
4685 | { |
4686 | extern pid_t inferior_process_group; | |
c906108c | 4687 | |
c3f6f71d | 4688 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4689 | } |
4690 | ||
c906108c | 4691 | /* |
c3f6f71d JM |
4692 | * Function: unconditionally_kill_inferior |
4693 | * | |
4694 | * Make it die. Wait for it to die. Clean up after it. | |
4695 | * Note: this should only be applied to the real process, | |
4696 | * not to an LWP, because of the check for parent-process. | |
4697 | * If we need this to work for an LWP, it needs some more logic. | |
4698 | */ | |
c906108c | 4699 | |
c3f6f71d | 4700 | static void |
fba45db2 | 4701 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4702 | { |
4703 | int parent_pid; | |
c906108c | 4704 | |
c3f6f71d JM |
4705 | parent_pid = proc_parent_pid (pi); |
4706 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4707 | /* FIXME: use access functions */ | |
4708 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4709 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4710 | file for the inferior. */ | |
4711 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4712 | { | |
4713 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4714 | } | |
4715 | #endif | |
4716 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4717 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4718 | to kill the inferior, otherwise it might remain stopped with a | |
4719 | pending SIGKILL. | |
4720 | We do not check the result of the PIOCSSIG, the inferior might have | |
4721 | died already. */ | |
4722 | { | |
37de36c6 | 4723 | gdb_siginfo_t newsiginfo; |
c906108c | 4724 | |
c3f6f71d JM |
4725 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4726 | newsiginfo.si_signo = SIGKILL; | |
4727 | newsiginfo.si_code = 0; | |
4728 | newsiginfo.si_errno = 0; | |
4729 | newsiginfo.si_pid = getpid (); | |
4730 | newsiginfo.si_uid = getuid (); | |
4731 | /* FIXME: use proc_set_current_signal */ | |
4732 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4733 | } | |
4734 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4735 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4736 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4737 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4738 | destroy_procinfo (pi); | |
c906108c | 4739 | |
c3f6f71d JM |
4740 | /* If pi is GDB's child, wait for it to die. */ |
4741 | if (parent_pid == getpid ()) | |
4742 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4743 | Should we check the returned event? */ | |
4744 | { | |
0d06e24b | 4745 | #if 0 |
c3f6f71d | 4746 | int status, ret; |
c906108c | 4747 | |
c3f6f71d JM |
4748 | ret = waitpid (pi->pid, &status, 0); |
4749 | #else | |
4750 | wait (NULL); | |
4751 | #endif | |
4752 | } | |
4753 | } | |
c906108c | 4754 | |
c3f6f71d JM |
4755 | /* |
4756 | * Function: target_kill_inferior | |
4757 | * | |
4758 | * We're done debugging it, and we want it to go away. | |
4759 | * Then we want GDB to forget all about it. | |
c906108c SS |
4760 | */ |
4761 | ||
c3f6f71d | 4762 | static void |
fba45db2 | 4763 | procfs_kill_inferior (void) |
c906108c | 4764 | { |
c3f6f71d JM |
4765 | if (inferior_pid != 0) /* ? */ |
4766 | { | |
4767 | /* Find procinfo for main process */ | |
4768 | procinfo *pi = find_procinfo (PIDGET (inferior_pid), 0); | |
c906108c | 4769 | |
c3f6f71d JM |
4770 | if (pi) |
4771 | unconditionally_kill_inferior (pi); | |
4772 | target_mourn_inferior (); | |
c906108c | 4773 | } |
c3f6f71d JM |
4774 | } |
4775 | ||
4776 | /* | |
4777 | * Function: target_mourn_inferior | |
4778 | * | |
4779 | * Forget we ever debugged this thing! | |
4780 | */ | |
c906108c | 4781 | |
c3f6f71d | 4782 | static void |
fba45db2 | 4783 | procfs_mourn_inferior (void) |
c3f6f71d JM |
4784 | { |
4785 | procinfo *pi; | |
c906108c | 4786 | |
c3f6f71d JM |
4787 | if (inferior_pid != 0) |
4788 | { | |
4789 | /* Find procinfo for main process */ | |
4790 | pi = find_procinfo (PIDGET (inferior_pid), 0); | |
4791 | if (pi) | |
4792 | destroy_procinfo (pi); | |
c906108c | 4793 | } |
c3f6f71d JM |
4794 | unpush_target (&procfs_ops); |
4795 | generic_mourn_inferior (); | |
4796 | } | |
c906108c | 4797 | |
c3f6f71d JM |
4798 | /* |
4799 | * Function: init_inferior | |
4800 | * | |
4801 | * When GDB forks to create a runnable inferior process, | |
4802 | * this function is called on the parent side of the fork. | |
4803 | * It's job is to do whatever is necessary to make the child | |
4804 | * ready to be debugged, and then wait for the child to synchronize. | |
4805 | */ | |
c906108c | 4806 | |
c3f6f71d | 4807 | static void |
fba45db2 | 4808 | procfs_init_inferior (int pid) |
c3f6f71d JM |
4809 | { |
4810 | procinfo *pi; | |
37de36c6 | 4811 | gdb_sigset_t signals; |
c3f6f71d | 4812 | int fail; |
c906108c | 4813 | |
c3f6f71d JM |
4814 | /* This routine called on the parent side (GDB side) |
4815 | after GDB forks the inferior. */ | |
c906108c | 4816 | |
c3f6f71d | 4817 | push_target (&procfs_ops); |
c906108c | 4818 | |
c3f6f71d JM |
4819 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4820 | perror ("procfs: out of memory in 'init_inferior'"); | |
4821 | ||
4822 | if (!open_procinfo_files (pi, FD_CTL)) | |
4823 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4824 | ||
4825 | /* | |
4826 | xmalloc // done | |
4827 | open_procinfo_files // done | |
4828 | link list // done | |
4829 | prfillset (trace) | |
4830 | procfs_notice_signals | |
4831 | prfillset (fault) | |
4832 | prdelset (FLTPAGE) | |
4833 | PIOCWSTOP | |
4834 | PIOCSFAULT | |
4835 | */ | |
4836 | ||
4837 | /* If not stopped yet, wait for it to stop. */ | |
4838 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4839 | !(proc_wait_for_stop (pi))) | |
4840 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4841 | ||
4842 | /* Save some of the /proc state to be restored if we detach. */ | |
4843 | /* FIXME: Why? In case another debugger was debugging it? | |
4844 | We're it's parent, for Ghu's sake! */ | |
4845 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4846 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4847 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4848 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4849 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4850 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4851 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4852 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4853 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4854 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4855 | ||
4856 | /* Register to trace selected signals in the child. */ | |
4857 | prfillset (&signals); | |
4858 | if (!register_gdb_signals (pi, &signals)) | |
4859 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4860 | ||
4861 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4862 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4863 | ||
0d06e24b JM |
4864 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4865 | and possibly even turning ON kill-on-last-close at this point. But | |
4866 | I can't make that change without careful testing which I don't have | |
4867 | time to do right now... */ | |
c3f6f71d JM |
4868 | /* Turn on run-on-last-close flag so that the child |
4869 | will die if GDB goes away for some reason. */ | |
4870 | if (!proc_set_run_on_last_close (pi)) | |
4871 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4872 | ||
4873 | /* The 'process ID' we return to GDB is composed of | |
4874 | the actual process ID plus the lwp ID. */ | |
4875 | inferior_pid = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c | 4876 | |
c3f6f71d JM |
4877 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4878 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4879 | #else | |
4880 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4881 | startup_inferior (2); | |
0d06e24b | 4882 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4883 | } |
c906108c | 4884 | |
c3f6f71d JM |
4885 | /* |
4886 | * Function: set_exec_trap | |
4887 | * | |
4888 | * When GDB forks to create a new process, this function is called | |
4889 | * on the child side of the fork before GDB exec's the user program. | |
4890 | * Its job is to make the child minimally debuggable, so that the | |
4891 | * parent GDB process can connect to the child and take over. | |
4892 | * This function should do only the minimum to make that possible, | |
4893 | * and to synchronize with the parent process. The parent process | |
4894 | * should take care of the details. | |
4895 | */ | |
4896 | ||
4897 | static void | |
fba45db2 | 4898 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4899 | { |
4900 | /* This routine called on the child side (inferior side) | |
4901 | after GDB forks the inferior. It must use only local variables, | |
4902 | because it may be sharing data space with its parent. */ | |
c906108c | 4903 | |
c3f6f71d | 4904 | procinfo *pi; |
37de36c6 | 4905 | sysset_t *exitset; |
c906108c | 4906 | |
c3f6f71d JM |
4907 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4908 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4909 | |
c3f6f71d JM |
4910 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4911 | { | |
4912 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4913 | gdb_flush (gdb_stderr); | |
4914 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4915 | _exit (127); | |
4916 | } | |
c906108c | 4917 | |
c3f6f71d JM |
4918 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4919 | /* OSF method for tracing exec syscalls. Quoting: | |
4920 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4921 | exits from exec system calls because of the user level loader. */ | |
4922 | /* FIXME: make nice and maybe move into an access function. */ | |
4923 | { | |
4924 | int prfs_flags; | |
c906108c | 4925 | |
c3f6f71d JM |
4926 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4927 | { | |
4928 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4929 | gdb_flush (gdb_stderr); | |
4930 | _exit (127); | |
4931 | } | |
4932 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4933 | |
c3f6f71d JM |
4934 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4935 | { | |
4936 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4937 | gdb_flush (gdb_stderr); | |
4938 | _exit (127); | |
4939 | } | |
4940 | } | |
4941 | #else /* not PRFS_STOPEXEC */ | |
4942 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4943 | /* GW: Rationale... | |
4944 | Not all systems with /proc have all the exec* syscalls with the same | |
4945 | names. On the SGI, for example, there is no SYS_exec, but there | |
4946 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4947 | |
37de36c6 KB |
4948 | exitset = sysset_t_alloc (pi); |
4949 | gdb_premptysysset (exitset); | |
c3f6f71d | 4950 | #ifdef SYS_exec |
37de36c6 | 4951 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4952 | #endif |
4953 | #ifdef SYS_execve | |
37de36c6 | 4954 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4955 | #endif |
4956 | #ifdef SYS_execv | |
37de36c6 | 4957 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4958 | #endif |
37de36c6 KB |
4959 | #ifdef DYNAMIC_SYSCALLS |
4960 | { | |
4961 | int callnum = find_syscall (pi, "execve"); | |
4962 | ||
4963 | if (callnum >= 0) | |
4964 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4965 | |
37de36c6 KB |
4966 | callnum = find_syscall (pi, "ra_execve"); |
4967 | if (callnum >= 0) | |
4968 | gdb_praddsysset (exitset, callnum); | |
4969 | } | |
4970 | #endif /* DYNAMIC_SYSCALLS */ | |
4971 | ||
4972 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4973 | { |
c3f6f71d JM |
4974 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4975 | gdb_flush (gdb_stderr); | |
4976 | _exit (127); | |
c906108c | 4977 | } |
c3f6f71d JM |
4978 | #endif /* PRFS_STOPEXEC */ |
4979 | ||
4980 | /* FIXME: should this be done in the parent instead? */ | |
4981 | /* Turn off inherit on fork flag so that all grand-children | |
4982 | of gdb start with tracing flags cleared. */ | |
4983 | if (!proc_unset_inherit_on_fork (pi)) | |
4984 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4985 | ||
4986 | /* Turn off run on last close flag, so that the child process | |
4987 | cannot run away just because we close our handle on it. | |
4988 | We want it to wait for the parent to attach. */ | |
4989 | if (!proc_unset_run_on_last_close (pi)) | |
4990 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4991 | ||
4992 | /* FIXME: No need to destroy the procinfo -- | |
4993 | we have our own address space, and we're about to do an exec! */ | |
4994 | /*destroy_procinfo (pi);*/ | |
c906108c | 4995 | } |
c906108c | 4996 | |
c3f6f71d JM |
4997 | /* |
4998 | * Function: create_inferior | |
4999 | * | |
5000 | * This function is called BEFORE gdb forks the inferior process. | |
5001 | * Its only real responsibility is to set things up for the fork, | |
5002 | * and tell GDB which two functions to call after the fork (one | |
5003 | * for the parent, and one for the child). | |
5004 | * | |
5005 | * This function does a complicated search for a unix shell program, | |
5006 | * which it then uses to parse arguments and environment variables | |
5007 | * to be sent to the child. I wonder whether this code could not | |
5008 | * be abstracted out and shared with other unix targets such as | |
5009 | * infptrace? | |
5010 | */ | |
c906108c SS |
5011 | |
5012 | static void | |
fba45db2 | 5013 | procfs_create_inferior (char *exec_file, char *allargs, char **env) |
c906108c SS |
5014 | { |
5015 | char *shell_file = getenv ("SHELL"); | |
5016 | char *tryname; | |
5017 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
5018 | { | |
5019 | ||
5020 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
5021 | just do this the normal way (via execlp, which operates by |
5022 | attempting an exec for each element of the PATH until it | |
5023 | finds one which succeeds), then there will be an exec for | |
5024 | each failed attempt, each of which will cause a PR_SYSEXIT | |
5025 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
5026 | for these failed execs with the ones for successful execs | |
5027 | (whether the exec has succeeded is stored at that time in the | |
5028 | carry bit or some such architecture-specific and | |
5029 | non-ABI-specified place). | |
5030 | ||
5031 | So I can't think of anything better than to search the PATH | |
5032 | now. This has several disadvantages: (1) There is a race | |
5033 | condition; if we find a file now and it is deleted before we | |
5034 | exec it, we lose, even if the deletion leaves a valid file | |
5035 | further down in the PATH, (2) there is no way to know exactly | |
5036 | what an executable (in the sense of "capable of being | |
5037 | exec'd") file is. Using access() loses because it may lose | |
5038 | if the caller is the superuser; failing to use it loses if | |
5039 | there are ACLs or some such. */ | |
c906108c SS |
5040 | |
5041 | char *p; | |
5042 | char *p1; | |
5043 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 5044 | path is used from within GDB. */ |
c906108c SS |
5045 | char *path = getenv ("PATH"); |
5046 | int len; | |
5047 | struct stat statbuf; | |
5048 | ||
5049 | if (path == NULL) | |
5050 | path = "/bin:/usr/bin"; | |
5051 | ||
5052 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 5053 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
5054 | { |
5055 | p1 = strchr (p, ':'); | |
5056 | if (p1 != NULL) | |
5057 | len = p1 - p; | |
5058 | else | |
5059 | len = strlen (p); | |
5060 | strncpy (tryname, p, len); | |
5061 | tryname[len] = '\0'; | |
5062 | strcat (tryname, "/"); | |
5063 | strcat (tryname, shell_file); | |
5064 | if (access (tryname, X_OK) < 0) | |
5065 | continue; | |
5066 | if (stat (tryname, &statbuf) < 0) | |
5067 | continue; | |
5068 | if (!S_ISREG (statbuf.st_mode)) | |
5069 | /* We certainly need to reject directories. I'm not quite | |
5070 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
5071 | that people want to exec() these things. */ | |
5072 | continue; | |
5073 | break; | |
5074 | } | |
5075 | if (p == NULL) | |
5076 | /* Not found. This must be an error rather than merely passing | |
5077 | the file to execlp(), because execlp() would try all the | |
5078 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
5079 | error ("procfs:%d -- Can't find shell %s in PATH", |
5080 | __LINE__, shell_file); | |
c906108c SS |
5081 | |
5082 | shell_file = tryname; | |
5083 | } | |
5084 | ||
c3f6f71d JM |
5085 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
5086 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
5087 | |
5088 | /* We are at the first instruction we care about. */ | |
5089 | /* Pedal to the metal... */ | |
5090 | ||
2acceee2 | 5091 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
5092 | } |
5093 | ||
c3f6f71d JM |
5094 | /* |
5095 | * Function: notice_thread | |
5096 | * | |
5097 | * Callback for find_new_threads. | |
5098 | * Calls "add_thread". | |
5099 | */ | |
c906108c | 5100 | |
c3f6f71d | 5101 | static int |
fba45db2 | 5102 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5103 | { |
c3f6f71d | 5104 | int gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5105 | |
c3f6f71d JM |
5106 | if (!in_thread_list (gdb_threadid)) |
5107 | add_thread (gdb_threadid); | |
c906108c | 5108 | |
c3f6f71d JM |
5109 | return 0; |
5110 | } | |
5111 | ||
5112 | /* | |
5113 | * Function: target_find_new_threads | |
5114 | * | |
5115 | * Query all the threads that the target knows about, | |
5116 | * and give them back to GDB to add to its list. | |
5117 | */ | |
5118 | ||
5119 | void | |
fba45db2 | 5120 | procfs_find_new_threads (void) |
c3f6f71d JM |
5121 | { |
5122 | procinfo *pi; | |
5123 | ||
5124 | /* Find procinfo for main process */ | |
5125 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
5126 | proc_update_threads (pi); | |
5127 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5128 | } |
5129 | ||
c3f6f71d JM |
5130 | /* |
5131 | * Function: target_thread_alive | |
5132 | * | |
5133 | * Return true if the thread is still 'alive'. | |
5134 | * | |
5135 | * This guy doesn't really seem to be doing his job. | |
5136 | * Got to investigate how to tell when a thread is really gone. | |
5137 | */ | |
c906108c | 5138 | |
c906108c | 5139 | static int |
fba45db2 | 5140 | procfs_thread_alive (int pid) |
c906108c | 5141 | { |
c3f6f71d JM |
5142 | int proc, thread; |
5143 | procinfo *pi; | |
c906108c | 5144 | |
c3f6f71d JM |
5145 | proc = PIDGET (pid); |
5146 | thread = TIDGET (pid); | |
5147 | /* If I don't know it, it ain't alive! */ | |
5148 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5149 | return 0; | |
5150 | ||
5151 | /* If I can't get its status, it ain't alive! | |
5152 | What's more, I need to forget about it! */ | |
5153 | if (!proc_get_status (pi)) | |
5154 | { | |
5155 | destroy_procinfo (pi); | |
5156 | return 0; | |
5157 | } | |
5158 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5159 | return 1; | |
c906108c | 5160 | } |
c3f6f71d JM |
5161 | |
5162 | /* | |
5163 | * Function: target_pid_to_str | |
5164 | * | |
5165 | * Return a string to be used to identify the thread in | |
5166 | * the "info threads" display. | |
5167 | */ | |
5168 | ||
5169 | char * | |
fba45db2 | 5170 | procfs_pid_to_str (int pid) |
c3f6f71d JM |
5171 | { |
5172 | static char buf[80]; | |
5173 | int proc, thread; | |
5174 | procinfo *pi; | |
5175 | ||
5176 | proc = PIDGET (pid); | |
5177 | thread = TIDGET (pid); | |
5178 | pi = find_procinfo (proc, thread); | |
5179 | ||
5180 | if (thread == 0) | |
5181 | sprintf (buf, "Process %d", proc); | |
5182 | else | |
5183 | sprintf (buf, "LWP %d", thread); | |
5184 | return &buf[0]; | |
5185 | } | |
5186 | ||
5187 | /* | |
5188 | * Function: procfs_set_watchpoint | |
5189 | * Insert a watchpoint | |
5190 | */ | |
5191 | ||
5192 | int | |
fba45db2 | 5193 | procfs_set_watchpoint (int pid, CORE_ADDR addr, int len, int rwflag, int after) |
c906108c | 5194 | { |
c3f6f71d | 5195 | #ifndef UNIXWARE |
37de36c6 | 5196 | #ifndef AIX5 |
c3f6f71d JM |
5197 | int pflags = 0; |
5198 | procinfo *pi; | |
5199 | ||
5200 | pi = find_procinfo_or_die (pid == -1 ? | |
5201 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
5202 | ||
5203 | /* Translate from GDB's flags to /proc's */ | |
5204 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5205 | { |
c3f6f71d JM |
5206 | switch (rwflag) { /* FIXME: need an enum! */ |
5207 | case hw_write: /* default watchpoint (write) */ | |
5208 | pflags = WRITE_WATCHFLAG; | |
5209 | break; | |
5210 | case hw_read: /* read watchpoint */ | |
5211 | pflags = READ_WATCHFLAG; | |
5212 | break; | |
5213 | case hw_access: /* access watchpoint */ | |
5214 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5215 | break; | |
5216 | case hw_execute: /* execution HW breakpoint */ | |
5217 | pflags = EXEC_WATCHFLAG; | |
5218 | break; | |
5219 | default: /* Something weird. Return error. */ | |
c906108c | 5220 | return -1; |
c3f6f71d JM |
5221 | } |
5222 | if (after) /* Stop after r/w access is completed. */ | |
5223 | pflags |= AFTER_WATCHFLAG; | |
5224 | } | |
5225 | ||
5226 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5227 | { | |
5228 | if (errno == E2BIG) /* Typical error for no resources */ | |
5229 | return -1; /* fail */ | |
5230 | /* GDB may try to remove the same watchpoint twice. | |
5231 | If a remove request returns no match, don't error. */ | |
c906108c | 5232 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5233 | return 0; /* ignore */ |
5234 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5235 | } |
37de36c6 KB |
5236 | #endif /* AIX5 */ |
5237 | #endif /* UNIXWARE */ | |
c906108c SS |
5238 | return 0; |
5239 | } | |
5240 | ||
c3f6f71d JM |
5241 | /* |
5242 | * Function: stopped_by_watchpoint | |
5243 | * | |
5244 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5245 | * else returns zero. | |
5246 | */ | |
5247 | ||
c906108c | 5248 | int |
fba45db2 | 5249 | procfs_stopped_by_watchpoint (int pid) |
c906108c | 5250 | { |
c3f6f71d | 5251 | procinfo *pi; |
c906108c | 5252 | |
aaeb7efa MS |
5253 | pi = find_procinfo (pid == -1 ? |
5254 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
5255 | ||
5256 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5257 | return 0; | |
5258 | ||
c3f6f71d | 5259 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5260 | { |
c3f6f71d JM |
5261 | if (proc_why (pi) == PR_FAULTED) |
5262 | { | |
c906108c | 5263 | #ifdef FLTWATCH |
c3f6f71d JM |
5264 | if (proc_what (pi) == FLTWATCH) |
5265 | return 1; | |
c906108c SS |
5266 | #endif |
5267 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5268 | if (proc_what (pi) == FLTKWATCH) |
5269 | return 1; | |
c906108c | 5270 | #endif |
c3f6f71d | 5271 | } |
c906108c SS |
5272 | } |
5273 | return 0; | |
5274 | } | |
c906108c | 5275 | |
c3f6f71d JM |
5276 | #ifdef TM_I386SOL2_H |
5277 | /* | |
5278 | * Function: procfs_find_LDT_entry | |
5279 | * | |
5280 | * Input: | |
5281 | * int pid; // The GDB-style pid-plus-LWP. | |
5282 | * | |
5283 | * Return: | |
5284 | * pointer to the corresponding LDT entry. | |
5285 | */ | |
c906108c | 5286 | |
c3f6f71d | 5287 | struct ssd * |
fba45db2 | 5288 | procfs_find_LDT_entry (int pid) |
c906108c | 5289 | { |
c3f6f71d JM |
5290 | gdb_gregset_t *gregs; |
5291 | int key; | |
5292 | procinfo *pi; | |
c906108c | 5293 | |
c3f6f71d JM |
5294 | /* Find procinfo for the lwp. */ |
5295 | if ((pi = find_procinfo (PIDGET (pid), TIDGET (pid))) == NULL) | |
c906108c | 5296 | { |
c3f6f71d JM |
5297 | warning ("procfs_find_LDT_entry: could not find procinfi for %d.", |
5298 | pid); | |
5299 | return NULL; | |
c906108c | 5300 | } |
c3f6f71d JM |
5301 | /* get its general registers. */ |
5302 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
5303 | { | |
5304 | warning ("procfs_find_LDT_entry: could not read gregs for %d.", | |
5305 | pid); | |
5306 | return NULL; | |
5307 | } | |
5308 | /* Now extract the GS register's lower 16 bits. */ | |
5309 | key = (*gregs)[GS] & 0xffff; | |
5310 | ||
5311 | /* Find the matching entry and return it. */ | |
5312 | return proc_get_LDT_entry (pi, key); | |
c906108c | 5313 | } |
c3f6f71d | 5314 | #endif /* TM_I386SOL2_H */ |
c906108c | 5315 | |
c3f6f71d JM |
5316 | |
5317 | ||
5318 | static void | |
fba45db2 | 5319 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5320 | { |
c3f6f71d JM |
5321 | struct cleanup *old_chain; |
5322 | procinfo *process = NULL; | |
5323 | procinfo *thread = NULL; | |
5324 | char **argv = NULL; | |
5325 | char *tmp = NULL; | |
5326 | int pid = 0; | |
5327 | int tid = 0; | |
c906108c | 5328 | |
c3f6f71d JM |
5329 | old_chain = make_cleanup (null_cleanup, 0); |
5330 | if (args) | |
0fda6bd2 JM |
5331 | { |
5332 | if ((argv = buildargv (args)) == NULL) | |
5333 | nomem (0); | |
5334 | else | |
004527cb | 5335 | make_cleanup_freeargv (argv); |
0fda6bd2 | 5336 | } |
c3f6f71d JM |
5337 | while (argv != NULL && *argv != NULL) |
5338 | { | |
5339 | if (isdigit (argv[0][0])) | |
5340 | { | |
5341 | pid = strtoul (argv[0], &tmp, 10); | |
5342 | if (*tmp == '/') | |
5343 | tid = strtoul (++tmp, NULL, 10); | |
5344 | } | |
5345 | else if (argv[0][0] == '/') | |
5346 | { | |
5347 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5348 | } | |
5349 | else | |
5350 | { | |
5351 | /* [...] */ | |
5352 | } | |
5353 | argv++; | |
5354 | } | |
5355 | if (pid == 0) | |
5356 | pid = PIDGET (inferior_pid); | |
5357 | if (pid == 0) | |
5358 | error ("No current process: you must name one."); | |
5359 | else | |
c906108c | 5360 | { |
c3f6f71d JM |
5361 | /* Have pid, will travel. |
5362 | First see if it's a process we're already debugging. */ | |
5363 | process = find_procinfo (pid, 0); | |
5364 | if (process == NULL) | |
5365 | { | |
5366 | /* No. So open a procinfo for it, but | |
5367 | remember to close it again when finished. */ | |
5368 | process = create_procinfo (pid, 0); | |
004527cb | 5369 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5370 | if (!open_procinfo_files (process, FD_CTL)) |
5371 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5372 | } | |
c906108c | 5373 | } |
c3f6f71d JM |
5374 | if (tid != 0) |
5375 | thread = create_procinfo (pid, tid); | |
5376 | ||
5377 | if (process) | |
5378 | { | |
5379 | printf_filtered ("process %d flags:\n", process->pid); | |
5380 | proc_prettyprint_flags (proc_flags (process), 1); | |
5381 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5382 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5383 | if (proc_get_nthreads (process) > 1) | |
5384 | printf_filtered ("Process has %d threads.\n", | |
5385 | proc_get_nthreads (process)); | |
5386 | } | |
5387 | if (thread) | |
5388 | { | |
5389 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5390 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5391 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5392 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5393 | } | |
5394 | ||
5395 | do_cleanups (old_chain); | |
c906108c SS |
5396 | } |
5397 | ||
c3f6f71d | 5398 | static void |
fba45db2 | 5399 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5400 | { |
c3f6f71d JM |
5401 | procinfo *pi; |
5402 | sysset_t *sysset; | |
5403 | int syscallnum = 0; | |
c906108c | 5404 | |
c3f6f71d JM |
5405 | if (inferior_pid <= 0) |
5406 | error ("you must be debugging a process to use this command."); | |
c906108c | 5407 | |
c3f6f71d JM |
5408 | if (args == NULL || args[0] == 0) |
5409 | error_no_arg ("system call to trace"); | |
5410 | ||
5411 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
5412 | if (isdigit (args[0])) | |
5413 | { | |
5414 | syscallnum = atoi (args); | |
5415 | if (entry_or_exit == PR_SYSENTRY) | |
5416 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5417 | else | |
5418 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5419 | |
c3f6f71d JM |
5420 | if (sysset == NULL) |
5421 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5422 | |
c3f6f71d | 5423 | if (mode == FLAG_SET) |
37de36c6 | 5424 | gdb_praddsysset (sysset, syscallnum); |
c3f6f71d | 5425 | else |
37de36c6 | 5426 | gdb_prdelsysset (sysset, syscallnum); |
c906108c | 5427 | |
c3f6f71d JM |
5428 | if (entry_or_exit == PR_SYSENTRY) |
5429 | { | |
5430 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5431 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5432 | } | |
5433 | else | |
5434 | { | |
5435 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5436 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5437 | } | |
5438 | } | |
5439 | } | |
5440 | ||
5441 | static void | |
fba45db2 | 5442 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5443 | { |
c3f6f71d JM |
5444 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5445 | } | |
c906108c | 5446 | |
c3f6f71d | 5447 | static void |
fba45db2 | 5448 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5449 | { |
5450 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5451 | } |
c906108c | 5452 | |
c3f6f71d | 5453 | static void |
fba45db2 | 5454 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5455 | { |
5456 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5457 | } | |
5458 | ||
5459 | static void | |
fba45db2 | 5460 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5461 | { |
c3f6f71d JM |
5462 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5463 | } | |
c906108c | 5464 | |
c906108c | 5465 | |
c906108c | 5466 | void |
fba45db2 | 5467 | _initialize_procfs (void) |
c906108c | 5468 | { |
c906108c SS |
5469 | init_procfs_ops (); |
5470 | add_target (&procfs_ops); | |
c3f6f71d JM |
5471 | add_info ("proc", info_proc_cmd, |
5472 | "Show /proc process information about any running process.\ | |
5473 | Default is the process being debugged."); | |
5474 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, | |
5475 | "Give a trace of entries into the syscall."); | |
5476 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5477 | "Give a trace of exits from the syscall."); | |
5478 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5479 | "Cancel a trace of entries into the syscall."); | |
5480 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5481 | "Cancel a trace of exits from the syscall."); | |
c3f6f71d JM |
5482 | } |
5483 | ||
5484 | /* =================== END, GDB "MODULE" =================== */ | |
5485 | ||
5486 | ||
5487 | ||
5488 | /* miscelaneous stubs: */ | |
5489 | /* The following satisfy a few random symbols mostly created by */ | |
5490 | /* the solaris threads implementation, which I will chase down */ | |
5491 | /* later. */ | |
5492 | ||
5493 | /* | |
5494 | * Return a pid for which we guarantee | |
5495 | * we will be able to find a 'live' procinfo. | |
5496 | */ | |
5497 | ||
5498 | int | |
fba45db2 | 5499 | procfs_first_available (void) |
c3f6f71d JM |
5500 | { |
5501 | if (procinfo_list) | |
5502 | return procinfo_list->pid; | |
5503 | else | |
5504 | return -1; | |
5505 | } |