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