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1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. | |
2 | ||
3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007 | |
4 | Free Software Foundation, Inc. | |
5 | ||
6 | Written by Michael Snyder at Cygnus Solutions. | |
7 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
8 | ||
9 | This file is part of GDB. | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 3 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
23 | ||
24 | #include "defs.h" | |
25 | #include "inferior.h" | |
26 | #include "target.h" | |
27 | #include "gdbcore.h" | |
28 | #include "elf-bfd.h" /* for elfcore_write_* */ | |
29 | #include "gdbcmd.h" | |
30 | #include "gdbthread.h" | |
31 | #include "regcache.h" | |
32 | ||
33 | #if defined (NEW_PROC_API) | |
34 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
35 | #endif | |
36 | ||
37 | #include <sys/procfs.h> | |
38 | #ifdef HAVE_SYS_FAULT_H | |
39 | #include <sys/fault.h> | |
40 | #endif | |
41 | #ifdef HAVE_SYS_SYSCALL_H | |
42 | #include <sys/syscall.h> | |
43 | #endif | |
44 | #include <sys/errno.h> | |
45 | #include "gdb_wait.h" | |
46 | #include <signal.h> | |
47 | #include <ctype.h> | |
48 | #include "gdb_string.h" | |
49 | #include "gdb_assert.h" | |
50 | #include "inflow.h" | |
51 | #include "auxv.h" | |
52 | ||
53 | /* | |
54 | * PROCFS.C | |
55 | * | |
56 | * This module provides the interface between GDB and the | |
57 | * /proc file system, which is used on many versions of Unix | |
58 | * as a means for debuggers to control other processes. | |
59 | * Examples of the systems that use this interface are: | |
60 | * Irix | |
61 | * Solaris | |
62 | * OSF | |
63 | * Unixware | |
64 | * AIX5 | |
65 | * | |
66 | * /proc works by imitating a file system: you open a simulated file | |
67 | * that represents the process you wish to interact with, and | |
68 | * perform operations on that "file" in order to examine or change | |
69 | * the state of the other process. | |
70 | * | |
71 | * The most important thing to know about /proc and this module | |
72 | * is that there are two very different interfaces to /proc: | |
73 | * One that uses the ioctl system call, and | |
74 | * another that uses read and write system calls. | |
75 | * This module has to support both /proc interfaces. This means | |
76 | * that there are two different ways of doing every basic operation. | |
77 | * | |
78 | * In order to keep most of the code simple and clean, I have | |
79 | * defined an interface "layer" which hides all these system calls. | |
80 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
81 | * and most or all occurrances of this ifdef should be confined to | |
82 | * this interface layer. | |
83 | */ | |
84 | ||
85 | ||
86 | /* Determine which /proc API we are using: | |
87 | The ioctl API defines PIOCSTATUS, while | |
88 | the read/write (multiple fd) API never does. */ | |
89 | ||
90 | #ifdef NEW_PROC_API | |
91 | #include <sys/types.h> | |
92 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ | |
93 | #endif | |
94 | ||
95 | #include <fcntl.h> /* for O_RDONLY */ | |
96 | #include <unistd.h> /* for "X_OK" */ | |
97 | #include "gdb_stat.h" /* for struct stat */ | |
98 | ||
99 | /* Note: procfs-utils.h must be included after the above system header | |
100 | files, because it redefines various system calls using macros. | |
101 | This may be incompatible with the prototype declarations. */ | |
102 | ||
103 | #include "proc-utils.h" | |
104 | ||
105 | /* Prototypes for supply_gregset etc. */ | |
106 | #include "gregset.h" | |
107 | ||
108 | /* =================== TARGET_OPS "MODULE" =================== */ | |
109 | ||
110 | /* | |
111 | * This module defines the GDB target vector and its methods. | |
112 | */ | |
113 | ||
114 | static void procfs_open (char *, int); | |
115 | static void procfs_attach (char *, int); | |
116 | static void procfs_detach (char *, int); | |
117 | static void procfs_resume (ptid_t, int, enum target_signal); | |
118 | static int procfs_can_run (void); | |
119 | static void procfs_stop (void); | |
120 | static void procfs_files_info (struct target_ops *); | |
121 | static void procfs_fetch_registers (struct regcache *, int); | |
122 | static void procfs_store_registers (struct regcache *, int); | |
123 | static void procfs_notice_signals (ptid_t); | |
124 | static void procfs_prepare_to_store (struct regcache *); | |
125 | static void procfs_kill_inferior (void); | |
126 | static void procfs_mourn_inferior (void); | |
127 | static void procfs_create_inferior (char *, char *, char **, int); | |
128 | static ptid_t procfs_wait (ptid_t, struct target_waitstatus *); | |
129 | static int procfs_xfer_memory (CORE_ADDR, char *, int, int, | |
130 | struct mem_attrib *attrib, | |
131 | struct target_ops *); | |
132 | static LONGEST procfs_xfer_partial (struct target_ops *ops, | |
133 | enum target_object object, | |
134 | const char *annex, | |
135 | void *readbuf, const void *writebuf, | |
136 | ULONGEST offset, LONGEST len); | |
137 | ||
138 | static int procfs_thread_alive (ptid_t); | |
139 | ||
140 | void procfs_find_new_threads (void); | |
141 | char *procfs_pid_to_str (ptid_t); | |
142 | ||
143 | static int proc_find_memory_regions (int (*) (CORE_ADDR, | |
144 | unsigned long, | |
145 | int, int, int, | |
146 | void *), | |
147 | void *); | |
148 | ||
149 | static char * procfs_make_note_section (bfd *, int *); | |
150 | ||
151 | static int procfs_can_use_hw_breakpoint (int, int, int); | |
152 | ||
153 | struct target_ops procfs_ops; /* the target vector */ | |
154 | ||
155 | static void | |
156 | init_procfs_ops (void) | |
157 | { | |
158 | procfs_ops.to_shortname = "procfs"; | |
159 | procfs_ops.to_longname = "Unix /proc child process"; | |
160 | procfs_ops.to_doc = | |
161 | "Unix /proc child process (started by the \"run\" command)."; | |
162 | procfs_ops.to_open = procfs_open; | |
163 | procfs_ops.to_can_run = procfs_can_run; | |
164 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
165 | procfs_ops.to_kill = procfs_kill_inferior; | |
166 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
167 | procfs_ops.to_attach = procfs_attach; | |
168 | procfs_ops.to_detach = procfs_detach; | |
169 | procfs_ops.to_wait = procfs_wait; | |
170 | procfs_ops.to_resume = procfs_resume; | |
171 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
172 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
173 | procfs_ops.to_store_registers = procfs_store_registers; | |
174 | procfs_ops.to_xfer_partial = procfs_xfer_partial; | |
175 | procfs_ops.deprecated_xfer_memory = procfs_xfer_memory; | |
176 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
177 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
178 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
179 | procfs_ops.to_files_info = procfs_files_info; | |
180 | procfs_ops.to_stop = procfs_stop; | |
181 | ||
182 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
183 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
184 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
185 | procfs_ops.to_terminal_ours = terminal_ours; | |
186 | procfs_ops.to_terminal_save_ours = terminal_save_ours; | |
187 | procfs_ops.to_terminal_info = child_terminal_info; | |
188 | ||
189 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
190 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
191 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
192 | ||
193 | procfs_ops.to_has_all_memory = 1; | |
194 | procfs_ops.to_has_memory = 1; | |
195 | procfs_ops.to_has_execution = 1; | |
196 | procfs_ops.to_has_stack = 1; | |
197 | procfs_ops.to_has_registers = 1; | |
198 | procfs_ops.to_stratum = process_stratum; | |
199 | procfs_ops.to_has_thread_control = tc_schedlock; | |
200 | procfs_ops.to_find_memory_regions = proc_find_memory_regions; | |
201 | procfs_ops.to_make_corefile_notes = procfs_make_note_section; | |
202 | procfs_ops.to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; | |
203 | procfs_ops.to_magic = OPS_MAGIC; | |
204 | } | |
205 | ||
206 | /* =================== END, TARGET_OPS "MODULE" =================== */ | |
207 | ||
208 | /* | |
209 | * World Unification: | |
210 | * | |
211 | * Put any typedefs, defines etc. here that are required for | |
212 | * the unification of code that handles different versions of /proc. | |
213 | */ | |
214 | ||
215 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
216 | #ifdef WA_READ | |
217 | enum { READ_WATCHFLAG = WA_READ, | |
218 | WRITE_WATCHFLAG = WA_WRITE, | |
219 | EXEC_WATCHFLAG = WA_EXEC, | |
220 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
221 | }; | |
222 | #endif | |
223 | #else /* Irix method for watchpoints */ | |
224 | enum { READ_WATCHFLAG = MA_READ, | |
225 | WRITE_WATCHFLAG = MA_WRITE, | |
226 | EXEC_WATCHFLAG = MA_EXEC, | |
227 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
228 | }; | |
229 | #endif | |
230 | ||
231 | /* gdb_sigset_t */ | |
232 | #ifdef HAVE_PR_SIGSET_T | |
233 | typedef pr_sigset_t gdb_sigset_t; | |
234 | #else | |
235 | typedef sigset_t gdb_sigset_t; | |
236 | #endif | |
237 | ||
238 | /* sigaction */ | |
239 | #ifdef HAVE_PR_SIGACTION64_T | |
240 | typedef pr_sigaction64_t gdb_sigaction_t; | |
241 | #else | |
242 | typedef struct sigaction gdb_sigaction_t; | |
243 | #endif | |
244 | ||
245 | /* siginfo */ | |
246 | #ifdef HAVE_PR_SIGINFO64_T | |
247 | typedef pr_siginfo64_t gdb_siginfo_t; | |
248 | #else | |
249 | typedef struct siginfo gdb_siginfo_t; | |
250 | #endif | |
251 | ||
252 | /* gdb_premptysysset */ | |
253 | #ifdef premptysysset | |
254 | #define gdb_premptysysset premptysysset | |
255 | #else | |
256 | #define gdb_premptysysset premptyset | |
257 | #endif | |
258 | ||
259 | /* praddsysset */ | |
260 | #ifdef praddsysset | |
261 | #define gdb_praddsysset praddsysset | |
262 | #else | |
263 | #define gdb_praddsysset praddset | |
264 | #endif | |
265 | ||
266 | /* prdelsysset */ | |
267 | #ifdef prdelsysset | |
268 | #define gdb_prdelsysset prdelsysset | |
269 | #else | |
270 | #define gdb_prdelsysset prdelset | |
271 | #endif | |
272 | ||
273 | /* prissyssetmember */ | |
274 | #ifdef prissyssetmember | |
275 | #define gdb_pr_issyssetmember prissyssetmember | |
276 | #else | |
277 | #define gdb_pr_issyssetmember prismember | |
278 | #endif | |
279 | ||
280 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
281 | as intuitively descriptive as it could be, so we'll define | |
282 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
283 | this writing, this feature is only found on AIX5 systems and | |
284 | basically means that the set of syscalls is not fixed. I.e, | |
285 | there's no nice table that one can #include to get all of the | |
286 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
287 | for each process. We are at least guaranteed that they won't | |
288 | change over the lifetime of the process. But each process could | |
289 | (in theory) have different syscall numbers. | |
290 | */ | |
291 | #ifdef HAVE_PRSYSENT_T | |
292 | #define DYNAMIC_SYSCALLS | |
293 | #endif | |
294 | ||
295 | ||
296 | ||
297 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
298 | ||
299 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
300 | ||
301 | /* The procinfo struct is a wrapper to hold all the state information | |
302 | concerning a /proc process. There should be exactly one procinfo | |
303 | for each process, and since GDB currently can debug only one | |
304 | process at a time, that means there should be only one procinfo. | |
305 | All of the LWP's of a process can be accessed indirectly thru the | |
306 | single process procinfo. | |
307 | ||
308 | However, against the day when GDB may debug more than one process, | |
309 | this data structure is kept in a list (which for now will hold no | |
310 | more than one member), and many functions will have a pointer to a | |
311 | procinfo as an argument. | |
312 | ||
313 | There will be a separate procinfo structure for use by the (not yet | |
314 | implemented) "info proc" command, so that we can print useful | |
315 | information about any random process without interfering with the | |
316 | inferior's procinfo information. */ | |
317 | ||
318 | #ifdef NEW_PROC_API | |
319 | /* format strings for /proc paths */ | |
320 | # ifndef CTL_PROC_NAME_FMT | |
321 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
322 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
323 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
324 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
325 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
326 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
327 | # endif | |
328 | /* the name of the proc status struct depends on the implementation */ | |
329 | typedef pstatus_t gdb_prstatus_t; | |
330 | typedef lwpstatus_t gdb_lwpstatus_t; | |
331 | #else /* ! NEW_PROC_API */ | |
332 | /* format strings for /proc paths */ | |
333 | # ifndef CTL_PROC_NAME_FMT | |
334 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
335 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
336 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
337 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
338 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
339 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
340 | # endif | |
341 | /* the name of the proc status struct depends on the implementation */ | |
342 | typedef prstatus_t gdb_prstatus_t; | |
343 | typedef prstatus_t gdb_lwpstatus_t; | |
344 | #endif /* NEW_PROC_API */ | |
345 | ||
346 | typedef struct procinfo { | |
347 | struct procinfo *next; | |
348 | int pid; /* Process ID */ | |
349 | int tid; /* Thread/LWP id */ | |
350 | ||
351 | /* process state */ | |
352 | int was_stopped; | |
353 | int ignore_next_sigstop; | |
354 | ||
355 | /* The following four fd fields may be identical, or may contain | |
356 | several different fd's, depending on the version of /proc | |
357 | (old ioctl or new read/write). */ | |
358 | ||
359 | int ctl_fd; /* File descriptor for /proc control file */ | |
360 | /* | |
361 | * The next three file descriptors are actually only needed in the | |
362 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
363 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
364 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
365 | * implementation) filling them with copies of the control fd. | |
366 | */ | |
367 | int status_fd; /* File descriptor for /proc status file */ | |
368 | int as_fd; /* File descriptor for /proc as file */ | |
369 | ||
370 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ | |
371 | ||
372 | fltset_t saved_fltset; /* Saved traced hardware fault set */ | |
373 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ | |
374 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
375 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
376 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
377 | ||
378 | gdb_prstatus_t prstatus; /* Current process status info */ | |
379 | ||
380 | #ifndef NEW_PROC_API | |
381 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
382 | #endif | |
383 | ||
384 | #ifdef DYNAMIC_SYSCALLS | |
385 | int num_syscalls; /* Total number of syscalls */ | |
386 | char **syscall_names; /* Syscall number to name map */ | |
387 | #endif | |
388 | ||
389 | struct procinfo *thread_list; | |
390 | ||
391 | int status_valid : 1; | |
392 | int gregs_valid : 1; | |
393 | int fpregs_valid : 1; | |
394 | int threads_valid: 1; | |
395 | } procinfo; | |
396 | ||
397 | static char errmsg[128]; /* shared error msg buffer */ | |
398 | ||
399 | /* Function prototypes for procinfo module: */ | |
400 | ||
401 | static procinfo *find_procinfo_or_die (int pid, int tid); | |
402 | static procinfo *find_procinfo (int pid, int tid); | |
403 | static procinfo *create_procinfo (int pid, int tid); | |
404 | static void destroy_procinfo (procinfo * p); | |
405 | static void do_destroy_procinfo_cleanup (void *); | |
406 | static void dead_procinfo (procinfo * p, char *msg, int killp); | |
407 | static int open_procinfo_files (procinfo * p, int which); | |
408 | static void close_procinfo_files (procinfo * p); | |
409 | static int sysset_t_size (procinfo *p); | |
410 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
411 | #ifdef DYNAMIC_SYSCALLS | |
412 | static void load_syscalls (procinfo *pi); | |
413 | static void free_syscalls (procinfo *pi); | |
414 | static int find_syscall (procinfo *pi, char *name); | |
415 | #endif /* DYNAMIC_SYSCALLS */ | |
416 | ||
417 | /* The head of the procinfo list: */ | |
418 | static procinfo * procinfo_list; | |
419 | ||
420 | /* | |
421 | * Function: find_procinfo | |
422 | * | |
423 | * Search the procinfo list. | |
424 | * | |
425 | * Returns: pointer to procinfo, or NULL if not found. | |
426 | */ | |
427 | ||
428 | static procinfo * | |
429 | find_procinfo (int pid, int tid) | |
430 | { | |
431 | procinfo *pi; | |
432 | ||
433 | for (pi = procinfo_list; pi; pi = pi->next) | |
434 | if (pi->pid == pid) | |
435 | break; | |
436 | ||
437 | if (pi) | |
438 | if (tid) | |
439 | { | |
440 | /* Don't check threads_valid. If we're updating the | |
441 | thread_list, we want to find whatever threads are already | |
442 | here. This means that in general it is the caller's | |
443 | responsibility to check threads_valid and update before | |
444 | calling find_procinfo, if the caller wants to find a new | |
445 | thread. */ | |
446 | ||
447 | for (pi = pi->thread_list; pi; pi = pi->next) | |
448 | if (pi->tid == tid) | |
449 | break; | |
450 | } | |
451 | ||
452 | return pi; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Function: find_procinfo_or_die | |
457 | * | |
458 | * Calls find_procinfo, but errors on failure. | |
459 | */ | |
460 | ||
461 | static procinfo * | |
462 | find_procinfo_or_die (int pid, int tid) | |
463 | { | |
464 | procinfo *pi = find_procinfo (pid, tid); | |
465 | ||
466 | if (pi == NULL) | |
467 | { | |
468 | if (tid) | |
469 | error (_("procfs: couldn't find pid %d (kernel thread %d) in procinfo list."), | |
470 | pid, tid); | |
471 | else | |
472 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); | |
473 | } | |
474 | return pi; | |
475 | } | |
476 | ||
477 | /* open_with_retry() is a wrapper for open(). The appropriate | |
478 | open() call is attempted; if unsuccessful, it will be retried as | |
479 | many times as needed for the EAGAIN and EINTR conditions. | |
480 | ||
481 | For other conditions, open_with_retry() will retry the open() a | |
482 | limited number of times. In addition, a short sleep is imposed | |
483 | prior to retrying the open(). The reason for this sleep is to give | |
484 | the kernel a chance to catch up and create the file in question in | |
485 | the event that GDB "wins" the race to open a file before the kernel | |
486 | has created it. */ | |
487 | ||
488 | static int | |
489 | open_with_retry (const char *pathname, int flags) | |
490 | { | |
491 | int retries_remaining, status; | |
492 | ||
493 | retries_remaining = 2; | |
494 | ||
495 | while (1) | |
496 | { | |
497 | status = open (pathname, flags); | |
498 | ||
499 | if (status >= 0 || retries_remaining == 0) | |
500 | break; | |
501 | else if (errno != EINTR && errno != EAGAIN) | |
502 | { | |
503 | retries_remaining--; | |
504 | sleep (1); | |
505 | } | |
506 | } | |
507 | ||
508 | return status; | |
509 | } | |
510 | ||
511 | /* | |
512 | * Function: open_procinfo_files | |
513 | * | |
514 | * Open the file descriptor for the process or LWP. | |
515 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
516 | * the others are opened lazily as needed. | |
517 | * else (if not NEW_PROC_API), there is only one real | |
518 | * file descriptor, but we keep multiple copies of it so that | |
519 | * the code that uses them does not have to be #ifdef'd. | |
520 | * | |
521 | * Return: file descriptor, or zero for failure. | |
522 | */ | |
523 | ||
524 | enum { FD_CTL, FD_STATUS, FD_AS }; | |
525 | ||
526 | static int | |
527 | open_procinfo_files (procinfo *pi, int which) | |
528 | { | |
529 | #ifdef NEW_PROC_API | |
530 | char tmp[MAX_PROC_NAME_SIZE]; | |
531 | #endif | |
532 | int fd; | |
533 | ||
534 | /* | |
535 | * This function is getting ALMOST long enough to break up into several. | |
536 | * Here is some rationale: | |
537 | * | |
538 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
539 | * There are several file descriptors that may need to be open | |
540 | * for any given process or LWP. The ones we're intereted in are: | |
541 | * - control (ctl) write-only change the state | |
542 | * - status (status) read-only query the state | |
543 | * - address space (as) read/write access memory | |
544 | * - map (map) read-only virtual addr map | |
545 | * Most of these are opened lazily as they are needed. | |
546 | * The pathnames for the 'files' for an LWP look slightly | |
547 | * different from those of a first-class process: | |
548 | * Pathnames for a process (<proc-id>): | |
549 | * /proc/<proc-id>/ctl | |
550 | * /proc/<proc-id>/status | |
551 | * /proc/<proc-id>/as | |
552 | * /proc/<proc-id>/map | |
553 | * Pathnames for an LWP (lwp-id): | |
554 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
555 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
556 | * An LWP has no map or address space file descriptor, since | |
557 | * the memory map and address space are shared by all LWPs. | |
558 | * | |
559 | * Everyone else (Solaris 2.5, Irix, OSF) | |
560 | * There is only one file descriptor for each process or LWP. | |
561 | * For convenience, we copy the same file descriptor into all | |
562 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
563 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
564 | * doesn't need any #ifdef's. | |
565 | * Pathname for all: | |
566 | * /proc/<proc-id> | |
567 | * | |
568 | * Solaris 2.5 LWP's: | |
569 | * Each LWP has an independent file descriptor, but these | |
570 | * are not obtained via the 'open' system call like the rest: | |
571 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
572 | * to the file descriptor of the parent process. | |
573 | * | |
574 | * OSF threads: | |
575 | * These do not even have their own independent file descriptor. | |
576 | * All operations are carried out on the file descriptor of the | |
577 | * parent process. Therefore we just call open again for each | |
578 | * thread, getting a new handle for the same 'file'. | |
579 | */ | |
580 | ||
581 | #ifdef NEW_PROC_API | |
582 | /* | |
583 | * In this case, there are several different file descriptors that | |
584 | * we might be asked to open. The control file descriptor will be | |
585 | * opened early, but the others will be opened lazily as they are | |
586 | * needed. | |
587 | */ | |
588 | ||
589 | strcpy (tmp, pi->pathname); | |
590 | switch (which) { /* which file descriptor to open? */ | |
591 | case FD_CTL: | |
592 | if (pi->tid) | |
593 | strcat (tmp, "/lwpctl"); | |
594 | else | |
595 | strcat (tmp, "/ctl"); | |
596 | fd = open_with_retry (tmp, O_WRONLY); | |
597 | if (fd <= 0) | |
598 | return 0; /* fail */ | |
599 | pi->ctl_fd = fd; | |
600 | break; | |
601 | case FD_AS: | |
602 | if (pi->tid) | |
603 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
604 | strcat (tmp, "/as"); | |
605 | fd = open_with_retry (tmp, O_RDWR); | |
606 | if (fd <= 0) | |
607 | return 0; /* fail */ | |
608 | pi->as_fd = fd; | |
609 | break; | |
610 | case FD_STATUS: | |
611 | if (pi->tid) | |
612 | strcat (tmp, "/lwpstatus"); | |
613 | else | |
614 | strcat (tmp, "/status"); | |
615 | fd = open_with_retry (tmp, O_RDONLY); | |
616 | if (fd <= 0) | |
617 | return 0; /* fail */ | |
618 | pi->status_fd = fd; | |
619 | break; | |
620 | default: | |
621 | return 0; /* unknown file descriptor */ | |
622 | } | |
623 | #else /* not NEW_PROC_API */ | |
624 | /* | |
625 | * In this case, there is only one file descriptor for each procinfo | |
626 | * (ie. each process or LWP). In fact, only the file descriptor for | |
627 | * the process can actually be opened by an 'open' system call. | |
628 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
629 | * on the process's file descriptor. | |
630 | * | |
631 | * For convenience, we copy each procinfo's single file descriptor | |
632 | * into all of the fields occupied by the several file descriptors | |
633 | * of the NEW_PROC_API implementation. That way, the code that uses | |
634 | * them can be written without ifdefs. | |
635 | */ | |
636 | ||
637 | ||
638 | #ifdef PIOCTSTATUS /* OSF */ | |
639 | /* Only one FD; just open it. */ | |
640 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
641 | return 0; | |
642 | #else /* Sol 2.5, Irix, other? */ | |
643 | if (pi->tid == 0) /* Master procinfo for the process */ | |
644 | { | |
645 | fd = open_with_retry (pi->pathname, O_RDWR); | |
646 | if (fd <= 0) | |
647 | return 0; /* fail */ | |
648 | } | |
649 | else /* LWP thread procinfo */ | |
650 | { | |
651 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
652 | procinfo *process; | |
653 | int lwpid = pi->tid; | |
654 | ||
655 | /* Find the procinfo for the entire process. */ | |
656 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
657 | return 0; /* fail */ | |
658 | ||
659 | /* Now obtain the file descriptor for the LWP. */ | |
660 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
661 | return 0; /* fail */ | |
662 | #else /* Irix, other? */ | |
663 | return 0; /* Don't know how to open threads */ | |
664 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
665 | } | |
666 | #endif /* OSF PIOCTSTATUS */ | |
667 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
668 | #endif /* NEW_PROC_API */ | |
669 | ||
670 | return 1; /* success */ | |
671 | } | |
672 | ||
673 | /* | |
674 | * Function: create_procinfo | |
675 | * | |
676 | * Allocate a data structure and link it into the procinfo list. | |
677 | * (First tries to find a pre-existing one (FIXME: why?) | |
678 | * | |
679 | * Return: pointer to new procinfo struct. | |
680 | */ | |
681 | ||
682 | static procinfo * | |
683 | create_procinfo (int pid, int tid) | |
684 | { | |
685 | procinfo *pi, *parent; | |
686 | ||
687 | if ((pi = find_procinfo (pid, tid))) | |
688 | return pi; /* Already exists, nothing to do. */ | |
689 | ||
690 | /* find parent before doing malloc, to save having to cleanup */ | |
691 | if (tid != 0) | |
692 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
693 | create it if it | |
694 | doesn't exist yet? */ | |
695 | ||
696 | pi = (procinfo *) xmalloc (sizeof (procinfo)); | |
697 | memset (pi, 0, sizeof (procinfo)); | |
698 | pi->pid = pid; | |
699 | pi->tid = tid; | |
700 | ||
701 | #ifdef DYNAMIC_SYSCALLS | |
702 | load_syscalls (pi); | |
703 | #endif | |
704 | ||
705 | pi->saved_entryset = sysset_t_alloc (pi); | |
706 | pi->saved_exitset = sysset_t_alloc (pi); | |
707 | ||
708 | /* Chain into list. */ | |
709 | if (tid == 0) | |
710 | { | |
711 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
712 | pi->next = procinfo_list; | |
713 | procinfo_list = pi; | |
714 | } | |
715 | else | |
716 | { | |
717 | #ifdef NEW_PROC_API | |
718 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
719 | #else | |
720 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
721 | #endif | |
722 | pi->next = parent->thread_list; | |
723 | parent->thread_list = pi; | |
724 | } | |
725 | return pi; | |
726 | } | |
727 | ||
728 | /* | |
729 | * Function: close_procinfo_files | |
730 | * | |
731 | * Close all file descriptors associated with the procinfo | |
732 | */ | |
733 | ||
734 | static void | |
735 | close_procinfo_files (procinfo *pi) | |
736 | { | |
737 | if (pi->ctl_fd > 0) | |
738 | close (pi->ctl_fd); | |
739 | #ifdef NEW_PROC_API | |
740 | if (pi->as_fd > 0) | |
741 | close (pi->as_fd); | |
742 | if (pi->status_fd > 0) | |
743 | close (pi->status_fd); | |
744 | #endif | |
745 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
746 | } | |
747 | ||
748 | /* | |
749 | * Function: destroy_procinfo | |
750 | * | |
751 | * Destructor function. Close, unlink and deallocate the object. | |
752 | */ | |
753 | ||
754 | static void | |
755 | destroy_one_procinfo (procinfo **list, procinfo *pi) | |
756 | { | |
757 | procinfo *ptr; | |
758 | ||
759 | /* Step one: unlink the procinfo from its list */ | |
760 | if (pi == *list) | |
761 | *list = pi->next; | |
762 | else | |
763 | for (ptr = *list; ptr; ptr = ptr->next) | |
764 | if (ptr->next == pi) | |
765 | { | |
766 | ptr->next = pi->next; | |
767 | break; | |
768 | } | |
769 | ||
770 | /* Step two: close any open file descriptors */ | |
771 | close_procinfo_files (pi); | |
772 | ||
773 | /* Step three: free the memory. */ | |
774 | #ifdef DYNAMIC_SYSCALLS | |
775 | free_syscalls (pi); | |
776 | #endif | |
777 | xfree (pi->saved_entryset); | |
778 | xfree (pi->saved_exitset); | |
779 | xfree (pi); | |
780 | } | |
781 | ||
782 | static void | |
783 | destroy_procinfo (procinfo *pi) | |
784 | { | |
785 | procinfo *tmp; | |
786 | ||
787 | if (pi->tid != 0) /* destroy a thread procinfo */ | |
788 | { | |
789 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
790 | destroy_one_procinfo (&tmp->thread_list, pi); | |
791 | } | |
792 | else /* destroy a process procinfo and all its threads */ | |
793 | { | |
794 | /* First destroy the children, if any; */ | |
795 | while (pi->thread_list != NULL) | |
796 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
797 | /* Then destroy the parent. Genocide!!! */ | |
798 | destroy_one_procinfo (&procinfo_list, pi); | |
799 | } | |
800 | } | |
801 | ||
802 | static void | |
803 | do_destroy_procinfo_cleanup (void *pi) | |
804 | { | |
805 | destroy_procinfo (pi); | |
806 | } | |
807 | ||
808 | enum { NOKILL, KILL }; | |
809 | ||
810 | /* | |
811 | * Function: dead_procinfo | |
812 | * | |
813 | * To be called on a non_recoverable error for a procinfo. | |
814 | * Prints error messages, optionally sends a SIGKILL to the process, | |
815 | * then destroys the data structure. | |
816 | */ | |
817 | ||
818 | static void | |
819 | dead_procinfo (procinfo *pi, char *msg, int kill_p) | |
820 | { | |
821 | char procfile[80]; | |
822 | ||
823 | if (pi->pathname) | |
824 | { | |
825 | print_sys_errmsg (pi->pathname, errno); | |
826 | } | |
827 | else | |
828 | { | |
829 | sprintf (procfile, "process %d", pi->pid); | |
830 | print_sys_errmsg (procfile, errno); | |
831 | } | |
832 | if (kill_p == KILL) | |
833 | kill (pi->pid, SIGKILL); | |
834 | ||
835 | destroy_procinfo (pi); | |
836 | error ((msg)); | |
837 | } | |
838 | ||
839 | /* | |
840 | * Function: sysset_t_size | |
841 | * | |
842 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
843 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
844 | * size of sysset_t isn't known until runtime. | |
845 | */ | |
846 | ||
847 | static int | |
848 | sysset_t_size (procinfo * pi) | |
849 | { | |
850 | #ifndef DYNAMIC_SYSCALLS | |
851 | return sizeof (sysset_t); | |
852 | #else | |
853 | return sizeof (sysset_t) - sizeof (uint64_t) | |
854 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
855 | / (8 * sizeof (uint64_t))); | |
856 | #endif | |
857 | } | |
858 | ||
859 | /* Function: sysset_t_alloc | |
860 | ||
861 | Allocate and (partially) initialize a sysset_t struct. */ | |
862 | ||
863 | static sysset_t * | |
864 | sysset_t_alloc (procinfo * pi) | |
865 | { | |
866 | sysset_t *ret; | |
867 | int size = sysset_t_size (pi); | |
868 | ret = xmalloc (size); | |
869 | #ifdef DYNAMIC_SYSCALLS | |
870 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
871 | / (8 * sizeof (uint64_t)); | |
872 | #endif | |
873 | return ret; | |
874 | } | |
875 | ||
876 | #ifdef DYNAMIC_SYSCALLS | |
877 | ||
878 | /* Function: load_syscalls | |
879 | ||
880 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize | |
881 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
882 | with the names. (Certain numbers may be skipped in which case the | |
883 | names for these numbers will be left as NULL.) */ | |
884 | ||
885 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
886 | #define MAX_SYSCALLS 65536 | |
887 | ||
888 | static void | |
889 | load_syscalls (procinfo *pi) | |
890 | { | |
891 | char pathname[MAX_PROC_NAME_SIZE]; | |
892 | int sysent_fd; | |
893 | prsysent_t header; | |
894 | prsyscall_t *syscalls; | |
895 | int i, size, maxcall; | |
896 | ||
897 | pi->num_syscalls = 0; | |
898 | pi->syscall_names = 0; | |
899 | ||
900 | /* Open the file descriptor for the sysent file */ | |
901 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
902 | sysent_fd = open_with_retry (pathname, O_RDONLY); | |
903 | if (sysent_fd < 0) | |
904 | { | |
905 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); | |
906 | } | |
907 | ||
908 | size = sizeof header - sizeof (prsyscall_t); | |
909 | if (read (sysent_fd, &header, size) != size) | |
910 | { | |
911 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); | |
912 | } | |
913 | ||
914 | if (header.pr_nsyscalls == 0) | |
915 | { | |
916 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); | |
917 | } | |
918 | ||
919 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
920 | syscalls = xmalloc (size); | |
921 | ||
922 | if (read (sysent_fd, syscalls, size) != size) | |
923 | { | |
924 | xfree (syscalls); | |
925 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); | |
926 | } | |
927 | ||
928 | /* Find maximum syscall number. This may not be the same as | |
929 | pr_nsyscalls since that value refers to the number of entries | |
930 | in the table. (Also, the docs indicate that some system | |
931 | call numbers may be skipped.) */ | |
932 | ||
933 | maxcall = syscalls[0].pr_number; | |
934 | ||
935 | for (i = 1; i < header.pr_nsyscalls; i++) | |
936 | if (syscalls[i].pr_number > maxcall | |
937 | && syscalls[i].pr_nameoff > 0 | |
938 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
939 | maxcall = syscalls[i].pr_number; | |
940 | ||
941 | pi->num_syscalls = maxcall+1; | |
942 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
943 | ||
944 | for (i = 0; i < pi->num_syscalls; i++) | |
945 | pi->syscall_names[i] = NULL; | |
946 | ||
947 | /* Read the syscall names in */ | |
948 | for (i = 0; i < header.pr_nsyscalls; i++) | |
949 | { | |
950 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
951 | int nread; | |
952 | int callnum; | |
953 | ||
954 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
955 | || syscalls[i].pr_number < 0 | |
956 | || syscalls[i].pr_nameoff <= 0 | |
957 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
958 | != (off_t) syscalls[i].pr_nameoff)) | |
959 | continue; | |
960 | ||
961 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
962 | if (nread <= 0) | |
963 | continue; | |
964 | ||
965 | callnum = syscalls[i].pr_number; | |
966 | ||
967 | if (pi->syscall_names[callnum] != NULL) | |
968 | { | |
969 | /* FIXME: Generate warning */ | |
970 | continue; | |
971 | } | |
972 | ||
973 | namebuf[nread-1] = '\0'; | |
974 | size = strlen (namebuf) + 1; | |
975 | pi->syscall_names[callnum] = xmalloc (size); | |
976 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
977 | pi->syscall_names[callnum][size-1] = '\0'; | |
978 | } | |
979 | ||
980 | close (sysent_fd); | |
981 | xfree (syscalls); | |
982 | } | |
983 | ||
984 | /* Function: free_syscalls | |
985 | ||
986 | Free the space allocated for the syscall names from the procinfo | |
987 | structure. */ | |
988 | ||
989 | static void | |
990 | free_syscalls (procinfo *pi) | |
991 | { | |
992 | if (pi->syscall_names) | |
993 | { | |
994 | int i; | |
995 | ||
996 | for (i = 0; i < pi->num_syscalls; i++) | |
997 | if (pi->syscall_names[i] != NULL) | |
998 | xfree (pi->syscall_names[i]); | |
999 | ||
1000 | xfree (pi->syscall_names); | |
1001 | pi->syscall_names = 0; | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | /* Function: find_syscall | |
1006 | ||
1007 | Given a name, look up (and return) the corresponding syscall number. | |
1008 | If no match is found, return -1. */ | |
1009 | ||
1010 | static int | |
1011 | find_syscall (procinfo *pi, char *name) | |
1012 | { | |
1013 | int i; | |
1014 | for (i = 0; i < pi->num_syscalls; i++) | |
1015 | { | |
1016 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1017 | return i; | |
1018 | } | |
1019 | return -1; | |
1020 | } | |
1021 | #endif | |
1022 | ||
1023 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ | |
1024 | ||
1025 | /* =================== /proc "MODULE" =================== */ | |
1026 | ||
1027 | /* | |
1028 | * This "module" is the interface layer between the /proc system API | |
1029 | * and the gdb target vector functions. This layer consists of | |
1030 | * access functions that encapsulate each of the basic operations | |
1031 | * that we need to use from the /proc API. | |
1032 | * | |
1033 | * The main motivation for this layer is to hide the fact that | |
1034 | * there are two very different implementations of the /proc API. | |
1035 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1036 | * functions, we do our best to hide them all in here. | |
1037 | */ | |
1038 | ||
1039 | int proc_get_status (procinfo * pi); | |
1040 | long proc_flags (procinfo * pi); | |
1041 | int proc_why (procinfo * pi); | |
1042 | int proc_what (procinfo * pi); | |
1043 | int proc_set_run_on_last_close (procinfo * pi); | |
1044 | int proc_unset_run_on_last_close (procinfo * pi); | |
1045 | int proc_set_inherit_on_fork (procinfo * pi); | |
1046 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1047 | int proc_set_async (procinfo * pi); | |
1048 | int proc_unset_async (procinfo * pi); | |
1049 | int proc_stop_process (procinfo * pi); | |
1050 | int proc_trace_signal (procinfo * pi, int signo); | |
1051 | int proc_ignore_signal (procinfo * pi, int signo); | |
1052 | int proc_clear_current_fault (procinfo * pi); | |
1053 | int proc_set_current_signal (procinfo * pi, int signo); | |
1054 | int proc_clear_current_signal (procinfo * pi); | |
1055 | int proc_set_gregs (procinfo * pi); | |
1056 | int proc_set_fpregs (procinfo * pi); | |
1057 | int proc_wait_for_stop (procinfo * pi); | |
1058 | int proc_run_process (procinfo * pi, int step, int signo); | |
1059 | int proc_kill (procinfo * pi, int signo); | |
1060 | int proc_parent_pid (procinfo * pi); | |
1061 | int proc_get_nthreads (procinfo * pi); | |
1062 | int proc_get_current_thread (procinfo * pi); | |
1063 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); | |
1064 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); | |
1065 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1066 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
1067 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); | |
1068 | ||
1069 | int proc_update_threads (procinfo * pi); | |
1070 | int proc_iterate_over_threads (procinfo * pi, | |
1071 | int (*func) (procinfo *, procinfo *, void *), | |
1072 | void *ptr); | |
1073 | ||
1074 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1075 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1076 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1077 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1078 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
1079 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); | |
1080 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1081 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1082 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
1083 | ||
1084 | void proc_warn (procinfo * pi, char *func, int line); | |
1085 | void proc_error (procinfo * pi, char *func, int line); | |
1086 | ||
1087 | void | |
1088 | proc_warn (procinfo *pi, char *func, int line) | |
1089 | { | |
1090 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1091 | print_sys_errmsg (errmsg, errno); | |
1092 | } | |
1093 | ||
1094 | void | |
1095 | proc_error (procinfo *pi, char *func, int line) | |
1096 | { | |
1097 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1098 | perror_with_name (errmsg); | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | * Function: proc_get_status | |
1103 | * | |
1104 | * Updates the status struct in the procinfo. | |
1105 | * There is a 'valid' flag, to let other functions know when | |
1106 | * this function needs to be called (so the status is only | |
1107 | * read when it is needed). The status file descriptor is | |
1108 | * also only opened when it is needed. | |
1109 | * | |
1110 | * Return: non-zero for success, zero for failure. | |
1111 | */ | |
1112 | ||
1113 | int | |
1114 | proc_get_status (procinfo *pi) | |
1115 | { | |
1116 | /* Status file descriptor is opened "lazily" */ | |
1117 | if (pi->status_fd == 0 && | |
1118 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1119 | { | |
1120 | pi->status_valid = 0; | |
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | #ifdef NEW_PROC_API | |
1125 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1126 | pi->status_valid = 0; /* fail */ | |
1127 | else | |
1128 | { | |
1129 | /* Sigh... I have to read a different data structure, | |
1130 | depending on whether this is a main process or an LWP. */ | |
1131 | if (pi->tid) | |
1132 | pi->status_valid = (read (pi->status_fd, | |
1133 | (char *) &pi->prstatus.pr_lwp, | |
1134 | sizeof (lwpstatus_t)) | |
1135 | == sizeof (lwpstatus_t)); | |
1136 | else | |
1137 | { | |
1138 | pi->status_valid = (read (pi->status_fd, | |
1139 | (char *) &pi->prstatus, | |
1140 | sizeof (gdb_prstatus_t)) | |
1141 | == sizeof (gdb_prstatus_t)); | |
1142 | #if 0 /*def UNIXWARE*/ | |
1143 | if (pi->status_valid && | |
1144 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1145 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1146 | /* Unixware peculiarity -- read the damn thing again! */ | |
1147 | pi->status_valid = (read (pi->status_fd, | |
1148 | (char *) &pi->prstatus, | |
1149 | sizeof (gdb_prstatus_t)) | |
1150 | == sizeof (gdb_prstatus_t)); | |
1151 | #endif /* UNIXWARE */ | |
1152 | } | |
1153 | } | |
1154 | #else /* ioctl method */ | |
1155 | #ifdef PIOCTSTATUS /* osf */ | |
1156 | if (pi->tid == 0) /* main process */ | |
1157 | { | |
1158 | /* Just read the danged status. Now isn't that simple? */ | |
1159 | pi->status_valid = | |
1160 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1161 | } | |
1162 | else | |
1163 | { | |
1164 | int win; | |
1165 | struct { | |
1166 | long pr_count; | |
1167 | tid_t pr_error_thread; | |
1168 | struct prstatus status; | |
1169 | } thread_status; | |
1170 | ||
1171 | thread_status.pr_count = 1; | |
1172 | thread_status.status.pr_tid = pi->tid; | |
1173 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1174 | if (win) | |
1175 | { | |
1176 | memcpy (&pi->prstatus, &thread_status.status, | |
1177 | sizeof (pi->prstatus)); | |
1178 | pi->status_valid = 1; | |
1179 | } | |
1180 | } | |
1181 | #else | |
1182 | /* Just read the danged status. Now isn't that simple? */ | |
1183 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1184 | #endif | |
1185 | #endif | |
1186 | ||
1187 | if (pi->status_valid) | |
1188 | { | |
1189 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1190 | proc_why (pi), | |
1191 | proc_what (pi), | |
1192 | proc_get_current_thread (pi)); | |
1193 | } | |
1194 | ||
1195 | /* The status struct includes general regs, so mark them valid too */ | |
1196 | pi->gregs_valid = pi->status_valid; | |
1197 | #ifdef NEW_PROC_API | |
1198 | /* In the read/write multiple-fd model, | |
1199 | the status struct includes the fp regs too, so mark them valid too */ | |
1200 | pi->fpregs_valid = pi->status_valid; | |
1201 | #endif | |
1202 | return pi->status_valid; /* True if success, false if failure. */ | |
1203 | } | |
1204 | ||
1205 | /* | |
1206 | * Function: proc_flags | |
1207 | * | |
1208 | * returns the process flags (pr_flags field). | |
1209 | */ | |
1210 | ||
1211 | long | |
1212 | proc_flags (procinfo *pi) | |
1213 | { | |
1214 | if (!pi->status_valid) | |
1215 | if (!proc_get_status (pi)) | |
1216 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
1217 | ||
1218 | #ifdef NEW_PROC_API | |
1219 | # ifdef UNIXWARE | |
1220 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1221 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1222 | The two sets of flags don't overlap. */ | |
1223 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1224 | # else | |
1225 | return pi->prstatus.pr_lwp.pr_flags; | |
1226 | # endif | |
1227 | #else | |
1228 | return pi->prstatus.pr_flags; | |
1229 | #endif | |
1230 | } | |
1231 | ||
1232 | /* | |
1233 | * Function: proc_why | |
1234 | * | |
1235 | * returns the pr_why field (why the process stopped). | |
1236 | */ | |
1237 | ||
1238 | int | |
1239 | proc_why (procinfo *pi) | |
1240 | { | |
1241 | if (!pi->status_valid) | |
1242 | if (!proc_get_status (pi)) | |
1243 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
1244 | ||
1245 | #ifdef NEW_PROC_API | |
1246 | return pi->prstatus.pr_lwp.pr_why; | |
1247 | #else | |
1248 | return pi->prstatus.pr_why; | |
1249 | #endif | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Function: proc_what | |
1254 | * | |
1255 | * returns the pr_what field (details of why the process stopped). | |
1256 | */ | |
1257 | ||
1258 | int | |
1259 | proc_what (procinfo *pi) | |
1260 | { | |
1261 | if (!pi->status_valid) | |
1262 | if (!proc_get_status (pi)) | |
1263 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
1264 | ||
1265 | #ifdef NEW_PROC_API | |
1266 | return pi->prstatus.pr_lwp.pr_what; | |
1267 | #else | |
1268 | return pi->prstatus.pr_what; | |
1269 | #endif | |
1270 | } | |
1271 | ||
1272 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ | |
1273 | /* | |
1274 | * Function: proc_nsysarg | |
1275 | * | |
1276 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1277 | */ | |
1278 | ||
1279 | int | |
1280 | proc_nsysarg (procinfo *pi) | |
1281 | { | |
1282 | if (!pi->status_valid) | |
1283 | if (!proc_get_status (pi)) | |
1284 | return 0; | |
1285 | ||
1286 | #ifdef NEW_PROC_API | |
1287 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1288 | #else | |
1289 | return pi->prstatus.pr_nsysarg; | |
1290 | #endif | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * Function: proc_sysargs | |
1295 | * | |
1296 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1297 | */ | |
1298 | ||
1299 | long * | |
1300 | proc_sysargs (procinfo *pi) | |
1301 | { | |
1302 | if (!pi->status_valid) | |
1303 | if (!proc_get_status (pi)) | |
1304 | return NULL; | |
1305 | ||
1306 | #ifdef NEW_PROC_API | |
1307 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1308 | #else | |
1309 | return (long *) &pi->prstatus.pr_sysarg; | |
1310 | #endif | |
1311 | } | |
1312 | ||
1313 | /* | |
1314 | * Function: proc_syscall | |
1315 | * | |
1316 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1317 | */ | |
1318 | ||
1319 | int | |
1320 | proc_syscall (procinfo *pi) | |
1321 | { | |
1322 | if (!pi->status_valid) | |
1323 | if (!proc_get_status (pi)) | |
1324 | return 0; | |
1325 | ||
1326 | #ifdef NEW_PROC_API | |
1327 | return pi->prstatus.pr_lwp.pr_syscall; | |
1328 | #else | |
1329 | return pi->prstatus.pr_syscall; | |
1330 | #endif | |
1331 | } | |
1332 | #endif /* PIOCSSPCACT */ | |
1333 | ||
1334 | /* | |
1335 | * Function: proc_cursig: | |
1336 | * | |
1337 | * returns the pr_cursig field (current signal). | |
1338 | */ | |
1339 | ||
1340 | long | |
1341 | proc_cursig (struct procinfo *pi) | |
1342 | { | |
1343 | if (!pi->status_valid) | |
1344 | if (!proc_get_status (pi)) | |
1345 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
1346 | ||
1347 | #ifdef NEW_PROC_API | |
1348 | return pi->prstatus.pr_lwp.pr_cursig; | |
1349 | #else | |
1350 | return pi->prstatus.pr_cursig; | |
1351 | #endif | |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | * Function: proc_modify_flag | |
1356 | * | |
1357 | * === I appologize for the messiness of this function. | |
1358 | * === This is an area where the different versions of | |
1359 | * === /proc are more inconsistent than usual. MVS | |
1360 | * | |
1361 | * Set or reset any of the following process flags: | |
1362 | * PR_FORK -- forked child will inherit trace flags | |
1363 | * PR_RLC -- traced process runs when last /proc file closed. | |
1364 | * PR_KLC -- traced process is killed when last /proc file closed. | |
1365 | * PR_ASYNC -- LWP's get to run/stop independently. | |
1366 | * | |
1367 | * There are three methods for doing this function: | |
1368 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1369 | * [Sol6, Sol7, UW] | |
1370 | * 2) Middle: PIOCSET/PIOCRESET | |
1371 | * [Irix, Sol5] | |
1372 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1373 | * [OSF, Sol5] | |
1374 | * | |
1375 | * Note: Irix does not define PR_ASYNC. | |
1376 | * Note: OSF does not define PR_KLC. | |
1377 | * Note: OSF is the only one that can ONLY use the oldest method. | |
1378 | * | |
1379 | * Arguments: | |
1380 | * pi -- the procinfo | |
1381 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1382 | * mode -- 1 for set, 0 for reset. | |
1383 | * | |
1384 | * Returns non-zero for success, zero for failure. | |
1385 | */ | |
1386 | ||
1387 | enum { FLAG_RESET, FLAG_SET }; | |
1388 | ||
1389 | static int | |
1390 | proc_modify_flag (procinfo *pi, long flag, long mode) | |
1391 | { | |
1392 | long win = 0; /* default to fail */ | |
1393 | ||
1394 | /* | |
1395 | * These operations affect the process as a whole, and applying | |
1396 | * them to an individual LWP has the same meaning as applying them | |
1397 | * to the main process. Therefore, if we're ever called with a | |
1398 | * pointer to an LWP's procinfo, let's substitute the process's | |
1399 | * procinfo and avoid opening the LWP's file descriptor | |
1400 | * unnecessarily. | |
1401 | */ | |
1402 | ||
1403 | if (pi->pid != 0) | |
1404 | pi = find_procinfo_or_die (pi->pid, 0); | |
1405 | ||
1406 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1407 | /* First normalize the PCUNSET/PCRESET command opcode | |
1408 | (which for no obvious reason has a different definition | |
1409 | from one operating system to the next...) */ | |
1410 | #ifdef PCUNSET | |
1411 | #define GDBRESET PCUNSET | |
1412 | #else | |
1413 | #ifdef PCRESET | |
1414 | #define GDBRESET PCRESET | |
1415 | #endif | |
1416 | #endif | |
1417 | { | |
1418 | procfs_ctl_t arg[2]; | |
1419 | ||
1420 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ | |
1421 | arg[0] = PCSET; | |
1422 | else /* Reset the flag */ | |
1423 | arg[0] = GDBRESET; | |
1424 | ||
1425 | arg[1] = flag; | |
1426 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1427 | } | |
1428 | #else | |
1429 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1430 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1431 | { | |
1432 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1433 | } | |
1434 | else /* Reset the flag */ | |
1435 | { | |
1436 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1437 | } | |
1438 | ||
1439 | #else | |
1440 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1441 | switch (flag) { | |
1442 | case PR_RLC: | |
1443 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1444 | { | |
1445 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1446 | } | |
1447 | else /* Clear run-on-last-close */ | |
1448 | { | |
1449 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1450 | } | |
1451 | break; | |
1452 | case PR_FORK: | |
1453 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1454 | { | |
1455 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1456 | } | |
1457 | else /* Clear inherit-on-fork */ | |
1458 | { | |
1459 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1460 | } | |
1461 | break; | |
1462 | default: | |
1463 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1464 | break; | |
1465 | } | |
1466 | #endif | |
1467 | #endif | |
1468 | #endif | |
1469 | #undef GDBRESET | |
1470 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1471 | pi->status_valid = 0; | |
1472 | ||
1473 | if (!win) | |
1474 | warning (_("procfs: modify_flag failed to turn %s %s"), | |
1475 | flag == PR_FORK ? "PR_FORK" : | |
1476 | flag == PR_RLC ? "PR_RLC" : | |
1477 | #ifdef PR_ASYNC | |
1478 | flag == PR_ASYNC ? "PR_ASYNC" : | |
1479 | #endif | |
1480 | #ifdef PR_KLC | |
1481 | flag == PR_KLC ? "PR_KLC" : | |
1482 | #endif | |
1483 | "<unknown flag>", | |
1484 | mode == FLAG_RESET ? "off" : "on"); | |
1485 | ||
1486 | return win; | |
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * Function: proc_set_run_on_last_close | |
1491 | * | |
1492 | * Set the run_on_last_close flag. | |
1493 | * Process with all threads will become runnable | |
1494 | * when debugger closes all /proc fds. | |
1495 | * | |
1496 | * Returns non-zero for success, zero for failure. | |
1497 | */ | |
1498 | ||
1499 | int | |
1500 | proc_set_run_on_last_close (procinfo *pi) | |
1501 | { | |
1502 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); | |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * Function: proc_unset_run_on_last_close | |
1507 | * | |
1508 | * Reset the run_on_last_close flag. | |
1509 | * Process will NOT become runnable | |
1510 | * when debugger closes its file handles. | |
1511 | * | |
1512 | * Returns non-zero for success, zero for failure. | |
1513 | */ | |
1514 | ||
1515 | int | |
1516 | proc_unset_run_on_last_close (procinfo *pi) | |
1517 | { | |
1518 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
1519 | } | |
1520 | ||
1521 | #ifdef PR_KLC | |
1522 | /* | |
1523 | * Function: proc_set_kill_on_last_close | |
1524 | * | |
1525 | * Set the kill_on_last_close flag. | |
1526 | * Process with all threads will be killed when debugger | |
1527 | * closes all /proc fds (or debugger exits or dies). | |
1528 | * | |
1529 | * Returns non-zero for success, zero for failure. | |
1530 | */ | |
1531 | ||
1532 | int | |
1533 | proc_set_kill_on_last_close (procinfo *pi) | |
1534 | { | |
1535 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1536 | } | |
1537 | ||
1538 | /* | |
1539 | * Function: proc_unset_kill_on_last_close | |
1540 | * | |
1541 | * Reset the kill_on_last_close flag. | |
1542 | * Process will NOT be killed when debugger | |
1543 | * closes its file handles (or exits or dies). | |
1544 | * | |
1545 | * Returns non-zero for success, zero for failure. | |
1546 | */ | |
1547 | ||
1548 | int | |
1549 | proc_unset_kill_on_last_close (procinfo *pi) | |
1550 | { | |
1551 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1552 | } | |
1553 | #endif /* PR_KLC */ | |
1554 | ||
1555 | /* | |
1556 | * Function: proc_set_inherit_on_fork | |
1557 | * | |
1558 | * Set inherit_on_fork flag. | |
1559 | * If the process forks a child while we are registered for events | |
1560 | * in the parent, then we will also recieve events from the child. | |
1561 | * | |
1562 | * Returns non-zero for success, zero for failure. | |
1563 | */ | |
1564 | ||
1565 | int | |
1566 | proc_set_inherit_on_fork (procinfo *pi) | |
1567 | { | |
1568 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1569 | } | |
1570 | ||
1571 | /* | |
1572 | * Function: proc_unset_inherit_on_fork | |
1573 | * | |
1574 | * Reset inherit_on_fork flag. | |
1575 | * If the process forks a child while we are registered for events | |
1576 | * in the parent, then we will NOT recieve events from the child. | |
1577 | * | |
1578 | * Returns non-zero for success, zero for failure. | |
1579 | */ | |
1580 | ||
1581 | int | |
1582 | proc_unset_inherit_on_fork (procinfo *pi) | |
1583 | { | |
1584 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1585 | } | |
1586 | ||
1587 | #ifdef PR_ASYNC | |
1588 | /* | |
1589 | * Function: proc_set_async | |
1590 | * | |
1591 | * Set PR_ASYNC flag. | |
1592 | * If one LWP stops because of a debug event (signal etc.), | |
1593 | * the remaining LWPs will continue to run. | |
1594 | * | |
1595 | * Returns non-zero for success, zero for failure. | |
1596 | */ | |
1597 | ||
1598 | int | |
1599 | proc_set_async (procinfo *pi) | |
1600 | { | |
1601 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Function: proc_unset_async | |
1606 | * | |
1607 | * Reset PR_ASYNC flag. | |
1608 | * If one LWP stops because of a debug event (signal etc.), | |
1609 | * then all other LWPs will stop as well. | |
1610 | * | |
1611 | * Returns non-zero for success, zero for failure. | |
1612 | */ | |
1613 | ||
1614 | int | |
1615 | proc_unset_async (procinfo *pi) | |
1616 | { | |
1617 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1618 | } | |
1619 | #endif /* PR_ASYNC */ | |
1620 | ||
1621 | /* | |
1622 | * Function: proc_stop_process | |
1623 | * | |
1624 | * Request the process/LWP to stop. Does not wait. | |
1625 | * Returns non-zero for success, zero for failure. | |
1626 | */ | |
1627 | ||
1628 | int | |
1629 | proc_stop_process (procinfo *pi) | |
1630 | { | |
1631 | int win; | |
1632 | ||
1633 | /* | |
1634 | * We might conceivably apply this operation to an LWP, and | |
1635 | * the LWP's ctl file descriptor might not be open. | |
1636 | */ | |
1637 | ||
1638 | if (pi->ctl_fd == 0 && | |
1639 | open_procinfo_files (pi, FD_CTL) == 0) | |
1640 | return 0; | |
1641 | else | |
1642 | { | |
1643 | #ifdef NEW_PROC_API | |
1644 | procfs_ctl_t cmd = PCSTOP; | |
1645 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1646 | #else /* ioctl method */ | |
1647 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1648 | /* Note: the call also reads the prstatus. */ | |
1649 | if (win) | |
1650 | { | |
1651 | pi->status_valid = 1; | |
1652 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1653 | proc_why (pi), | |
1654 | proc_what (pi), | |
1655 | proc_get_current_thread (pi)); | |
1656 | } | |
1657 | #endif | |
1658 | } | |
1659 | ||
1660 | return win; | |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * Function: proc_wait_for_stop | |
1665 | * | |
1666 | * Wait for the process or LWP to stop (block until it does). | |
1667 | * Returns non-zero for success, zero for failure. | |
1668 | */ | |
1669 | ||
1670 | int | |
1671 | proc_wait_for_stop (procinfo *pi) | |
1672 | { | |
1673 | int win; | |
1674 | ||
1675 | /* | |
1676 | * We should never have to apply this operation to any procinfo | |
1677 | * except the one for the main process. If that ever changes | |
1678 | * for any reason, then take out the following clause and | |
1679 | * replace it with one that makes sure the ctl_fd is open. | |
1680 | */ | |
1681 | ||
1682 | if (pi->tid != 0) | |
1683 | pi = find_procinfo_or_die (pi->pid, 0); | |
1684 | ||
1685 | #ifdef NEW_PROC_API | |
1686 | { | |
1687 | procfs_ctl_t cmd = PCWSTOP; | |
1688 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1689 | /* We been runnin' and we stopped -- need to update status. */ | |
1690 | pi->status_valid = 0; | |
1691 | } | |
1692 | #else /* ioctl method */ | |
1693 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1694 | /* Above call also refreshes the prstatus. */ | |
1695 | if (win) | |
1696 | { | |
1697 | pi->status_valid = 1; | |
1698 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1699 | proc_why (pi), | |
1700 | proc_what (pi), | |
1701 | proc_get_current_thread (pi)); | |
1702 | } | |
1703 | #endif | |
1704 | ||
1705 | return win; | |
1706 | } | |
1707 | ||
1708 | /* | |
1709 | * Function: proc_run_process | |
1710 | * | |
1711 | * Make the process or LWP runnable. | |
1712 | * Options (not all are implemented): | |
1713 | * - single-step | |
1714 | * - clear current fault | |
1715 | * - clear current signal | |
1716 | * - abort the current system call | |
1717 | * - stop as soon as finished with system call | |
1718 | * - (ioctl): set traced signal set | |
1719 | * - (ioctl): set held signal set | |
1720 | * - (ioctl): set traced fault set | |
1721 | * - (ioctl): set start pc (vaddr) | |
1722 | * Always clear the current fault. | |
1723 | * Clear the current signal if 'signo' is zero. | |
1724 | * | |
1725 | * Arguments: | |
1726 | * pi the process or LWP to operate on. | |
1727 | * step if true, set the process or LWP to trap after one instr. | |
1728 | * signo if zero, clear the current signal if any. | |
1729 | * if non-zero, set the current signal to this one. | |
1730 | * | |
1731 | * Returns non-zero for success, zero for failure. | |
1732 | */ | |
1733 | ||
1734 | int | |
1735 | proc_run_process (procinfo *pi, int step, int signo) | |
1736 | { | |
1737 | int win; | |
1738 | int runflags; | |
1739 | ||
1740 | /* | |
1741 | * We will probably have to apply this operation to individual threads, | |
1742 | * so make sure the control file descriptor is open. | |
1743 | */ | |
1744 | ||
1745 | if (pi->ctl_fd == 0 && | |
1746 | open_procinfo_files (pi, FD_CTL) == 0) | |
1747 | { | |
1748 | return 0; | |
1749 | } | |
1750 | ||
1751 | runflags = PRCFAULT; /* always clear current fault */ | |
1752 | if (step) | |
1753 | runflags |= PRSTEP; | |
1754 | if (signo == 0) | |
1755 | runflags |= PRCSIG; | |
1756 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1757 | proc_set_current_signal (pi, signo); | |
1758 | ||
1759 | #ifdef NEW_PROC_API | |
1760 | { | |
1761 | procfs_ctl_t cmd[2]; | |
1762 | ||
1763 | cmd[0] = PCRUN; | |
1764 | cmd[1] = runflags; | |
1765 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1766 | } | |
1767 | #else /* ioctl method */ | |
1768 | { | |
1769 | prrun_t prrun; | |
1770 | ||
1771 | memset (&prrun, 0, sizeof (prrun)); | |
1772 | prrun.pr_flags = runflags; | |
1773 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1774 | } | |
1775 | #endif | |
1776 | ||
1777 | return win; | |
1778 | } | |
1779 | ||
1780 | /* | |
1781 | * Function: proc_set_traced_signals | |
1782 | * | |
1783 | * Register to trace signals in the process or LWP. | |
1784 | * Returns non-zero for success, zero for failure. | |
1785 | */ | |
1786 | ||
1787 | int | |
1788 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) | |
1789 | { | |
1790 | int win; | |
1791 | ||
1792 | /* | |
1793 | * We should never have to apply this operation to any procinfo | |
1794 | * except the one for the main process. If that ever changes | |
1795 | * for any reason, then take out the following clause and | |
1796 | * replace it with one that makes sure the ctl_fd is open. | |
1797 | */ | |
1798 | ||
1799 | if (pi->tid != 0) | |
1800 | pi = find_procinfo_or_die (pi->pid, 0); | |
1801 | ||
1802 | #ifdef NEW_PROC_API | |
1803 | { | |
1804 | struct { | |
1805 | procfs_ctl_t cmd; | |
1806 | /* Use char array to avoid alignment issues. */ | |
1807 | char sigset[sizeof (gdb_sigset_t)]; | |
1808 | } arg; | |
1809 | ||
1810 | arg.cmd = PCSTRACE; | |
1811 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); | |
1812 | ||
1813 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
1814 | } | |
1815 | #else /* ioctl method */ | |
1816 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1817 | #endif | |
1818 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1819 | pi->status_valid = 0; | |
1820 | ||
1821 | if (!win) | |
1822 | warning (_("procfs: set_traced_signals failed")); | |
1823 | return win; | |
1824 | } | |
1825 | ||
1826 | /* | |
1827 | * Function: proc_set_traced_faults | |
1828 | * | |
1829 | * Register to trace hardware faults in the process or LWP. | |
1830 | * Returns non-zero for success, zero for failure. | |
1831 | */ | |
1832 | ||
1833 | int | |
1834 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) | |
1835 | { | |
1836 | int win; | |
1837 | ||
1838 | /* | |
1839 | * We should never have to apply this operation to any procinfo | |
1840 | * except the one for the main process. If that ever changes | |
1841 | * for any reason, then take out the following clause and | |
1842 | * replace it with one that makes sure the ctl_fd is open. | |
1843 | */ | |
1844 | ||
1845 | if (pi->tid != 0) | |
1846 | pi = find_procinfo_or_die (pi->pid, 0); | |
1847 | ||
1848 | #ifdef NEW_PROC_API | |
1849 | { | |
1850 | struct { | |
1851 | procfs_ctl_t cmd; | |
1852 | /* Use char array to avoid alignment issues. */ | |
1853 | char fltset[sizeof (fltset_t)]; | |
1854 | } arg; | |
1855 | ||
1856 | arg.cmd = PCSFAULT; | |
1857 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
1858 | ||
1859 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
1860 | } | |
1861 | #else /* ioctl method */ | |
1862 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1863 | #endif | |
1864 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1865 | pi->status_valid = 0; | |
1866 | ||
1867 | return win; | |
1868 | } | |
1869 | ||
1870 | /* | |
1871 | * Function: proc_set_traced_sysentry | |
1872 | * | |
1873 | * Register to trace entry to system calls in the process or LWP. | |
1874 | * Returns non-zero for success, zero for failure. | |
1875 | */ | |
1876 | ||
1877 | int | |
1878 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) | |
1879 | { | |
1880 | int win; | |
1881 | ||
1882 | /* | |
1883 | * We should never have to apply this operation to any procinfo | |
1884 | * except the one for the main process. If that ever changes | |
1885 | * for any reason, then take out the following clause and | |
1886 | * replace it with one that makes sure the ctl_fd is open. | |
1887 | */ | |
1888 | ||
1889 | if (pi->tid != 0) | |
1890 | pi = find_procinfo_or_die (pi->pid, 0); | |
1891 | ||
1892 | #ifdef NEW_PROC_API | |
1893 | { | |
1894 | struct gdb_proc_ctl_pcsentry { | |
1895 | procfs_ctl_t cmd; | |
1896 | /* Use char array to avoid alignment issues. */ | |
1897 | char sysset[sizeof (sysset_t)]; | |
1898 | } *argp; | |
1899 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1900 | - sizeof (sysset_t) | |
1901 | + sysset_t_size (pi); | |
1902 | ||
1903 | argp = xmalloc (argp_size); | |
1904 | ||
1905 | argp->cmd = PCSENTRY; | |
1906 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1907 | ||
1908 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1909 | xfree (argp); | |
1910 | } | |
1911 | #else /* ioctl method */ | |
1912 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1913 | #endif | |
1914 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1915 | pi->status_valid = 0; | |
1916 | ||
1917 | return win; | |
1918 | } | |
1919 | ||
1920 | /* | |
1921 | * Function: proc_set_traced_sysexit | |
1922 | * | |
1923 | * Register to trace exit from system calls in the process or LWP. | |
1924 | * Returns non-zero for success, zero for failure. | |
1925 | */ | |
1926 | ||
1927 | int | |
1928 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) | |
1929 | { | |
1930 | int win; | |
1931 | ||
1932 | /* | |
1933 | * We should never have to apply this operation to any procinfo | |
1934 | * except the one for the main process. If that ever changes | |
1935 | * for any reason, then take out the following clause and | |
1936 | * replace it with one that makes sure the ctl_fd is open. | |
1937 | */ | |
1938 | ||
1939 | if (pi->tid != 0) | |
1940 | pi = find_procinfo_or_die (pi->pid, 0); | |
1941 | ||
1942 | #ifdef NEW_PROC_API | |
1943 | { | |
1944 | struct gdb_proc_ctl_pcsexit { | |
1945 | procfs_ctl_t cmd; | |
1946 | /* Use char array to avoid alignment issues. */ | |
1947 | char sysset[sizeof (sysset_t)]; | |
1948 | } *argp; | |
1949 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1950 | - sizeof (sysset_t) | |
1951 | + sysset_t_size (pi); | |
1952 | ||
1953 | argp = xmalloc (argp_size); | |
1954 | ||
1955 | argp->cmd = PCSEXIT; | |
1956 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1957 | ||
1958 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1959 | xfree (argp); | |
1960 | } | |
1961 | #else /* ioctl method */ | |
1962 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1963 | #endif | |
1964 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1965 | pi->status_valid = 0; | |
1966 | ||
1967 | return win; | |
1968 | } | |
1969 | ||
1970 | /* | |
1971 | * Function: proc_set_held_signals | |
1972 | * | |
1973 | * Specify the set of blocked / held signals in the process or LWP. | |
1974 | * Returns non-zero for success, zero for failure. | |
1975 | */ | |
1976 | ||
1977 | int | |
1978 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) | |
1979 | { | |
1980 | int win; | |
1981 | ||
1982 | /* | |
1983 | * We should never have to apply this operation to any procinfo | |
1984 | * except the one for the main process. If that ever changes | |
1985 | * for any reason, then take out the following clause and | |
1986 | * replace it with one that makes sure the ctl_fd is open. | |
1987 | */ | |
1988 | ||
1989 | if (pi->tid != 0) | |
1990 | pi = find_procinfo_or_die (pi->pid, 0); | |
1991 | ||
1992 | #ifdef NEW_PROC_API | |
1993 | { | |
1994 | struct { | |
1995 | procfs_ctl_t cmd; | |
1996 | /* Use char array to avoid alignment issues. */ | |
1997 | char hold[sizeof (gdb_sigset_t)]; | |
1998 | } arg; | |
1999 | ||
2000 | arg.cmd = PCSHOLD; | |
2001 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); | |
2002 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2003 | } | |
2004 | #else | |
2005 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); | |
2006 | #endif | |
2007 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
2008 | pi->status_valid = 0; | |
2009 | ||
2010 | return win; | |
2011 | } | |
2012 | ||
2013 | /* | |
2014 | * Function: proc_get_pending_signals | |
2015 | * | |
2016 | * returns the set of signals that are pending in the process or LWP. | |
2017 | * Will also copy the sigset if 'save' is non-zero. | |
2018 | */ | |
2019 | ||
2020 | gdb_sigset_t * | |
2021 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
2022 | { | |
2023 | gdb_sigset_t *ret = NULL; | |
2024 | ||
2025 | /* | |
2026 | * We should never have to apply this operation to any procinfo | |
2027 | * except the one for the main process. If that ever changes | |
2028 | * for any reason, then take out the following clause and | |
2029 | * replace it with one that makes sure the ctl_fd is open. | |
2030 | */ | |
2031 | ||
2032 | if (pi->tid != 0) | |
2033 | pi = find_procinfo_or_die (pi->pid, 0); | |
2034 | ||
2035 | if (!pi->status_valid) | |
2036 | if (!proc_get_status (pi)) | |
2037 | return NULL; | |
2038 | ||
2039 | #ifdef NEW_PROC_API | |
2040 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2041 | #else | |
2042 | ret = &pi->prstatus.pr_sigpend; | |
2043 | #endif | |
2044 | if (save && ret) | |
2045 | memcpy (save, ret, sizeof (gdb_sigset_t)); | |
2046 | ||
2047 | return ret; | |
2048 | } | |
2049 | ||
2050 | /* | |
2051 | * Function: proc_get_signal_actions | |
2052 | * | |
2053 | * returns the set of signal actions. | |
2054 | * Will also copy the sigactionset if 'save' is non-zero. | |
2055 | */ | |
2056 | ||
2057 | gdb_sigaction_t * | |
2058 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
2059 | { | |
2060 | gdb_sigaction_t *ret = NULL; | |
2061 | ||
2062 | /* | |
2063 | * We should never have to apply this operation to any procinfo | |
2064 | * except the one for the main process. If that ever changes | |
2065 | * for any reason, then take out the following clause and | |
2066 | * replace it with one that makes sure the ctl_fd is open. | |
2067 | */ | |
2068 | ||
2069 | if (pi->tid != 0) | |
2070 | pi = find_procinfo_or_die (pi->pid, 0); | |
2071 | ||
2072 | if (!pi->status_valid) | |
2073 | if (!proc_get_status (pi)) | |
2074 | return NULL; | |
2075 | ||
2076 | #ifdef NEW_PROC_API | |
2077 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2078 | #else | |
2079 | ret = &pi->prstatus.pr_action; | |
2080 | #endif | |
2081 | if (save && ret) | |
2082 | memcpy (save, ret, sizeof (gdb_sigaction_t)); | |
2083 | ||
2084 | return ret; | |
2085 | } | |
2086 | ||
2087 | /* | |
2088 | * Function: proc_get_held_signals | |
2089 | * | |
2090 | * returns the set of signals that are held / blocked. | |
2091 | * Will also copy the sigset if 'save' is non-zero. | |
2092 | */ | |
2093 | ||
2094 | gdb_sigset_t * | |
2095 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
2096 | { | |
2097 | gdb_sigset_t *ret = NULL; | |
2098 | ||
2099 | /* | |
2100 | * We should never have to apply this operation to any procinfo | |
2101 | * except the one for the main process. If that ever changes | |
2102 | * for any reason, then take out the following clause and | |
2103 | * replace it with one that makes sure the ctl_fd is open. | |
2104 | */ | |
2105 | ||
2106 | if (pi->tid != 0) | |
2107 | pi = find_procinfo_or_die (pi->pid, 0); | |
2108 | ||
2109 | #ifdef NEW_PROC_API | |
2110 | if (!pi->status_valid) | |
2111 | if (!proc_get_status (pi)) | |
2112 | return NULL; | |
2113 | ||
2114 | #ifdef UNIXWARE | |
2115 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
2116 | #else | |
2117 | ret = &pi->prstatus.pr_lwp.pr_lwphold; | |
2118 | #endif /* UNIXWARE */ | |
2119 | #else /* not NEW_PROC_API */ | |
2120 | { | |
2121 | static gdb_sigset_t sigheld; | |
2122 | ||
2123 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2124 | ret = &sigheld; | |
2125 | } | |
2126 | #endif /* NEW_PROC_API */ | |
2127 | if (save && ret) | |
2128 | memcpy (save, ret, sizeof (gdb_sigset_t)); | |
2129 | ||
2130 | return ret; | |
2131 | } | |
2132 | ||
2133 | /* | |
2134 | * Function: proc_get_traced_signals | |
2135 | * | |
2136 | * returns the set of signals that are traced / debugged. | |
2137 | * Will also copy the sigset if 'save' is non-zero. | |
2138 | */ | |
2139 | ||
2140 | gdb_sigset_t * | |
2141 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
2142 | { | |
2143 | gdb_sigset_t *ret = NULL; | |
2144 | ||
2145 | /* | |
2146 | * We should never have to apply this operation to any procinfo | |
2147 | * except the one for the main process. If that ever changes | |
2148 | * for any reason, then take out the following clause and | |
2149 | * replace it with one that makes sure the ctl_fd is open. | |
2150 | */ | |
2151 | ||
2152 | if (pi->tid != 0) | |
2153 | pi = find_procinfo_or_die (pi->pid, 0); | |
2154 | ||
2155 | #ifdef NEW_PROC_API | |
2156 | if (!pi->status_valid) | |
2157 | if (!proc_get_status (pi)) | |
2158 | return NULL; | |
2159 | ||
2160 | ret = &pi->prstatus.pr_sigtrace; | |
2161 | #else | |
2162 | { | |
2163 | static gdb_sigset_t sigtrace; | |
2164 | ||
2165 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2166 | ret = &sigtrace; | |
2167 | } | |
2168 | #endif | |
2169 | if (save && ret) | |
2170 | memcpy (save, ret, sizeof (gdb_sigset_t)); | |
2171 | ||
2172 | return ret; | |
2173 | } | |
2174 | ||
2175 | /* | |
2176 | * Function: proc_trace_signal | |
2177 | * | |
2178 | * Add 'signo' to the set of signals that are traced. | |
2179 | * Returns non-zero for success, zero for failure. | |
2180 | */ | |
2181 | ||
2182 | int | |
2183 | proc_trace_signal (procinfo *pi, int signo) | |
2184 | { | |
2185 | gdb_sigset_t temp; | |
2186 | ||
2187 | /* | |
2188 | * We should never have to apply this operation to any procinfo | |
2189 | * except the one for the main process. If that ever changes | |
2190 | * for any reason, then take out the following clause and | |
2191 | * replace it with one that makes sure the ctl_fd is open. | |
2192 | */ | |
2193 | ||
2194 | if (pi->tid != 0) | |
2195 | pi = find_procinfo_or_die (pi->pid, 0); | |
2196 | ||
2197 | if (pi) | |
2198 | { | |
2199 | if (proc_get_traced_signals (pi, &temp)) | |
2200 | { | |
2201 | praddset (&temp, signo); | |
2202 | return proc_set_traced_signals (pi, &temp); | |
2203 | } | |
2204 | } | |
2205 | ||
2206 | return 0; /* failure */ | |
2207 | } | |
2208 | ||
2209 | /* | |
2210 | * Function: proc_ignore_signal | |
2211 | * | |
2212 | * Remove 'signo' from the set of signals that are traced. | |
2213 | * Returns non-zero for success, zero for failure. | |
2214 | */ | |
2215 | ||
2216 | int | |
2217 | proc_ignore_signal (procinfo *pi, int signo) | |
2218 | { | |
2219 | gdb_sigset_t temp; | |
2220 | ||
2221 | /* | |
2222 | * We should never have to apply this operation to any procinfo | |
2223 | * except the one for the main process. If that ever changes | |
2224 | * for any reason, then take out the following clause and | |
2225 | * replace it with one that makes sure the ctl_fd is open. | |
2226 | */ | |
2227 | ||
2228 | if (pi->tid != 0) | |
2229 | pi = find_procinfo_or_die (pi->pid, 0); | |
2230 | ||
2231 | if (pi) | |
2232 | { | |
2233 | if (proc_get_traced_signals (pi, &temp)) | |
2234 | { | |
2235 | prdelset (&temp, signo); | |
2236 | return proc_set_traced_signals (pi, &temp); | |
2237 | } | |
2238 | } | |
2239 | ||
2240 | return 0; /* failure */ | |
2241 | } | |
2242 | ||
2243 | /* | |
2244 | * Function: proc_get_traced_faults | |
2245 | * | |
2246 | * returns the set of hardware faults that are traced /debugged. | |
2247 | * Will also copy the faultset if 'save' is non-zero. | |
2248 | */ | |
2249 | ||
2250 | fltset_t * | |
2251 | proc_get_traced_faults (procinfo *pi, fltset_t *save) | |
2252 | { | |
2253 | fltset_t *ret = NULL; | |
2254 | ||
2255 | /* | |
2256 | * We should never have to apply this operation to any procinfo | |
2257 | * except the one for the main process. If that ever changes | |
2258 | * for any reason, then take out the following clause and | |
2259 | * replace it with one that makes sure the ctl_fd is open. | |
2260 | */ | |
2261 | ||
2262 | if (pi->tid != 0) | |
2263 | pi = find_procinfo_or_die (pi->pid, 0); | |
2264 | ||
2265 | #ifdef NEW_PROC_API | |
2266 | if (!pi->status_valid) | |
2267 | if (!proc_get_status (pi)) | |
2268 | return NULL; | |
2269 | ||
2270 | ret = &pi->prstatus.pr_flttrace; | |
2271 | #else | |
2272 | { | |
2273 | static fltset_t flttrace; | |
2274 | ||
2275 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2276 | ret = &flttrace; | |
2277 | } | |
2278 | #endif | |
2279 | if (save && ret) | |
2280 | memcpy (save, ret, sizeof (fltset_t)); | |
2281 | ||
2282 | return ret; | |
2283 | } | |
2284 | ||
2285 | /* | |
2286 | * Function: proc_get_traced_sysentry | |
2287 | * | |
2288 | * returns the set of syscalls that are traced /debugged on entry. | |
2289 | * Will also copy the syscall set if 'save' is non-zero. | |
2290 | */ | |
2291 | ||
2292 | sysset_t * | |
2293 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) | |
2294 | { | |
2295 | sysset_t *ret = NULL; | |
2296 | ||
2297 | /* | |
2298 | * We should never have to apply this operation to any procinfo | |
2299 | * except the one for the main process. If that ever changes | |
2300 | * for any reason, then take out the following clause and | |
2301 | * replace it with one that makes sure the ctl_fd is open. | |
2302 | */ | |
2303 | ||
2304 | if (pi->tid != 0) | |
2305 | pi = find_procinfo_or_die (pi->pid, 0); | |
2306 | ||
2307 | #ifdef NEW_PROC_API | |
2308 | if (!pi->status_valid) | |
2309 | if (!proc_get_status (pi)) | |
2310 | return NULL; | |
2311 | ||
2312 | #ifndef DYNAMIC_SYSCALLS | |
2313 | ret = &pi->prstatus.pr_sysentry; | |
2314 | #else /* DYNAMIC_SYSCALLS */ | |
2315 | { | |
2316 | static sysset_t *sysentry; | |
2317 | size_t size; | |
2318 | ||
2319 | if (!sysentry) | |
2320 | sysentry = sysset_t_alloc (pi); | |
2321 | ret = sysentry; | |
2322 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2323 | return NULL; | |
2324 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2325 | { | |
2326 | gdb_premptysysset (sysentry); | |
2327 | } | |
2328 | else | |
2329 | { | |
2330 | int rsize; | |
2331 | ||
2332 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2333 | SEEK_SET) | |
2334 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2335 | return NULL; | |
2336 | size = sysset_t_size (pi); | |
2337 | gdb_premptysysset (sysentry); | |
2338 | rsize = read (pi->status_fd, sysentry, size); | |
2339 | if (rsize < 0) | |
2340 | return NULL; | |
2341 | } | |
2342 | } | |
2343 | #endif /* DYNAMIC_SYSCALLS */ | |
2344 | #else /* !NEW_PROC_API */ | |
2345 | { | |
2346 | static sysset_t sysentry; | |
2347 | ||
2348 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) | |
2349 | ret = &sysentry; | |
2350 | } | |
2351 | #endif /* NEW_PROC_API */ | |
2352 | if (save && ret) | |
2353 | memcpy (save, ret, sysset_t_size (pi)); | |
2354 | ||
2355 | return ret; | |
2356 | } | |
2357 | ||
2358 | /* | |
2359 | * Function: proc_get_traced_sysexit | |
2360 | * | |
2361 | * returns the set of syscalls that are traced /debugged on exit. | |
2362 | * Will also copy the syscall set if 'save' is non-zero. | |
2363 | */ | |
2364 | ||
2365 | sysset_t * | |
2366 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) | |
2367 | { | |
2368 | sysset_t * ret = NULL; | |
2369 | ||
2370 | /* | |
2371 | * We should never have to apply this operation to any procinfo | |
2372 | * except the one for the main process. If that ever changes | |
2373 | * for any reason, then take out the following clause and | |
2374 | * replace it with one that makes sure the ctl_fd is open. | |
2375 | */ | |
2376 | ||
2377 | if (pi->tid != 0) | |
2378 | pi = find_procinfo_or_die (pi->pid, 0); | |
2379 | ||
2380 | #ifdef NEW_PROC_API | |
2381 | if (!pi->status_valid) | |
2382 | if (!proc_get_status (pi)) | |
2383 | return NULL; | |
2384 | ||
2385 | #ifndef DYNAMIC_SYSCALLS | |
2386 | ret = &pi->prstatus.pr_sysexit; | |
2387 | #else /* DYNAMIC_SYSCALLS */ | |
2388 | { | |
2389 | static sysset_t *sysexit; | |
2390 | size_t size; | |
2391 | ||
2392 | if (!sysexit) | |
2393 | sysexit = sysset_t_alloc (pi); | |
2394 | ret = sysexit; | |
2395 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2396 | return NULL; | |
2397 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2398 | { | |
2399 | gdb_premptysysset (sysexit); | |
2400 | } | |
2401 | else | |
2402 | { | |
2403 | int rsize; | |
2404 | ||
2405 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2406 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2407 | return NULL; | |
2408 | size = sysset_t_size (pi); | |
2409 | gdb_premptysysset (sysexit); | |
2410 | rsize = read (pi->status_fd, sysexit, size); | |
2411 | if (rsize < 0) | |
2412 | return NULL; | |
2413 | } | |
2414 | } | |
2415 | #endif /* DYNAMIC_SYSCALLS */ | |
2416 | #else | |
2417 | { | |
2418 | static sysset_t sysexit; | |
2419 | ||
2420 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) | |
2421 | ret = &sysexit; | |
2422 | } | |
2423 | #endif | |
2424 | if (save && ret) | |
2425 | memcpy (save, ret, sysset_t_size (pi)); | |
2426 | ||
2427 | return ret; | |
2428 | } | |
2429 | ||
2430 | /* | |
2431 | * Function: proc_clear_current_fault | |
2432 | * | |
2433 | * The current fault (if any) is cleared; the associated signal | |
2434 | * will not be sent to the process or LWP when it resumes. | |
2435 | * Returns non-zero for success, zero for failure. | |
2436 | */ | |
2437 | ||
2438 | int | |
2439 | proc_clear_current_fault (procinfo *pi) | |
2440 | { | |
2441 | int win; | |
2442 | ||
2443 | /* | |
2444 | * We should never have to apply this operation to any procinfo | |
2445 | * except the one for the main process. If that ever changes | |
2446 | * for any reason, then take out the following clause and | |
2447 | * replace it with one that makes sure the ctl_fd is open. | |
2448 | */ | |
2449 | ||
2450 | if (pi->tid != 0) | |
2451 | pi = find_procinfo_or_die (pi->pid, 0); | |
2452 | ||
2453 | #ifdef NEW_PROC_API | |
2454 | { | |
2455 | procfs_ctl_t cmd = PCCFAULT; | |
2456 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2457 | } | |
2458 | #else | |
2459 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2460 | #endif | |
2461 | ||
2462 | return win; | |
2463 | } | |
2464 | ||
2465 | /* | |
2466 | * Function: proc_set_current_signal | |
2467 | * | |
2468 | * Set the "current signal" that will be delivered next to the process. | |
2469 | * NOTE: semantics are different from those of KILL. | |
2470 | * This signal will be delivered to the process or LWP | |
2471 | * immediately when it is resumed (even if the signal is held/blocked); | |
2472 | * it will NOT immediately cause another event of interest, and will NOT | |
2473 | * first trap back to the debugger. | |
2474 | * | |
2475 | * Returns non-zero for success, zero for failure. | |
2476 | */ | |
2477 | ||
2478 | int | |
2479 | proc_set_current_signal (procinfo *pi, int signo) | |
2480 | { | |
2481 | int win; | |
2482 | struct { | |
2483 | procfs_ctl_t cmd; | |
2484 | /* Use char array to avoid alignment issues. */ | |
2485 | char sinfo[sizeof (gdb_siginfo_t)]; | |
2486 | } arg; | |
2487 | gdb_siginfo_t *mysinfo; | |
2488 | ||
2489 | /* | |
2490 | * We should never have to apply this operation to any procinfo | |
2491 | * except the one for the main process. If that ever changes | |
2492 | * for any reason, then take out the following clause and | |
2493 | * replace it with one that makes sure the ctl_fd is open. | |
2494 | */ | |
2495 | ||
2496 | if (pi->tid != 0) | |
2497 | pi = find_procinfo_or_die (pi->pid, 0); | |
2498 | ||
2499 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2500 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2501 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2502 | * it messes up the current signal. Work around the kernel bug. | |
2503 | */ | |
2504 | if (signo > 0 && | |
2505 | signo == proc_cursig (pi)) | |
2506 | return 1; /* I assume this is a success? */ | |
2507 | #endif | |
2508 | ||
2509 | /* The pointer is just a type alias. */ | |
2510 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; | |
2511 | mysinfo->si_signo = signo; | |
2512 | mysinfo->si_code = 0; | |
2513 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2514 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2515 | ||
2516 | #ifdef NEW_PROC_API | |
2517 | arg.cmd = PCSSIG; | |
2518 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2519 | #else | |
2520 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2521 | #endif | |
2522 | ||
2523 | return win; | |
2524 | } | |
2525 | ||
2526 | /* | |
2527 | * Function: proc_clear_current_signal | |
2528 | * | |
2529 | * The current signal (if any) is cleared, and | |
2530 | * is not sent to the process or LWP when it resumes. | |
2531 | * Returns non-zero for success, zero for failure. | |
2532 | */ | |
2533 | ||
2534 | int | |
2535 | proc_clear_current_signal (procinfo *pi) | |
2536 | { | |
2537 | int win; | |
2538 | ||
2539 | /* | |
2540 | * We should never have to apply this operation to any procinfo | |
2541 | * except the one for the main process. If that ever changes | |
2542 | * for any reason, then take out the following clause and | |
2543 | * replace it with one that makes sure the ctl_fd is open. | |
2544 | */ | |
2545 | ||
2546 | if (pi->tid != 0) | |
2547 | pi = find_procinfo_or_die (pi->pid, 0); | |
2548 | ||
2549 | #ifdef NEW_PROC_API | |
2550 | { | |
2551 | struct { | |
2552 | procfs_ctl_t cmd; | |
2553 | /* Use char array to avoid alignment issues. */ | |
2554 | char sinfo[sizeof (gdb_siginfo_t)]; | |
2555 | } arg; | |
2556 | gdb_siginfo_t *mysinfo; | |
2557 | ||
2558 | arg.cmd = PCSSIG; | |
2559 | /* The pointer is just a type alias. */ | |
2560 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; | |
2561 | mysinfo->si_signo = 0; | |
2562 | mysinfo->si_code = 0; | |
2563 | mysinfo->si_errno = 0; | |
2564 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2565 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2566 | ||
2567 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2568 | } | |
2569 | #else | |
2570 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2571 | #endif | |
2572 | ||
2573 | return win; | |
2574 | } | |
2575 | ||
2576 | /* Return the general-purpose registers for the process or LWP | |
2577 | corresponding to PI. Upon failure, return NULL. */ | |
2578 | ||
2579 | gdb_gregset_t * | |
2580 | proc_get_gregs (procinfo *pi) | |
2581 | { | |
2582 | if (!pi->status_valid || !pi->gregs_valid) | |
2583 | if (!proc_get_status (pi)) | |
2584 | return NULL; | |
2585 | ||
2586 | /* OK, sorry about the ifdef's. There's three cases instead of two, | |
2587 | because in this case Unixware and Solaris/RW differ. */ | |
2588 | ||
2589 | #ifdef NEW_PROC_API | |
2590 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ | |
2591 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2592 | # else | |
2593 | return &pi->prstatus.pr_lwp.pr_reg; | |
2594 | # endif | |
2595 | #else | |
2596 | return &pi->prstatus.pr_reg; | |
2597 | #endif | |
2598 | } | |
2599 | ||
2600 | /* Return the general-purpose registers for the process or LWP | |
2601 | corresponding to PI. Upon failure, return NULL. */ | |
2602 | ||
2603 | gdb_fpregset_t * | |
2604 | proc_get_fpregs (procinfo *pi) | |
2605 | { | |
2606 | #ifdef NEW_PROC_API | |
2607 | if (!pi->status_valid || !pi->fpregs_valid) | |
2608 | if (!proc_get_status (pi)) | |
2609 | return NULL; | |
2610 | ||
2611 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ | |
2612 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2613 | # else | |
2614 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2615 | # endif | |
2616 | ||
2617 | #else /* not NEW_PROC_API */ | |
2618 | if (pi->fpregs_valid) | |
2619 | return &pi->fpregset; /* Already got 'em. */ | |
2620 | else | |
2621 | { | |
2622 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) | |
2623 | { | |
2624 | return NULL; | |
2625 | } | |
2626 | else | |
2627 | { | |
2628 | # ifdef PIOCTGFPREG | |
2629 | struct { | |
2630 | long pr_count; | |
2631 | tid_t pr_error_thread; | |
2632 | tfpregset_t thread_1; | |
2633 | } thread_fpregs; | |
2634 | ||
2635 | thread_fpregs.pr_count = 1; | |
2636 | thread_fpregs.thread_1.tid = pi->tid; | |
2637 | ||
2638 | if (pi->tid == 0 | |
2639 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2640 | { | |
2641 | pi->fpregs_valid = 1; | |
2642 | return &pi->fpregset; /* Got 'em now! */ | |
2643 | } | |
2644 | else if (pi->tid != 0 | |
2645 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2646 | { | |
2647 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2648 | sizeof (pi->fpregset)); | |
2649 | pi->fpregs_valid = 1; | |
2650 | return &pi->fpregset; /* Got 'em now! */ | |
2651 | } | |
2652 | else | |
2653 | { | |
2654 | return NULL; | |
2655 | } | |
2656 | # else | |
2657 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2658 | { | |
2659 | pi->fpregs_valid = 1; | |
2660 | return &pi->fpregset; /* Got 'em now! */ | |
2661 | } | |
2662 | else | |
2663 | { | |
2664 | return NULL; | |
2665 | } | |
2666 | # endif | |
2667 | } | |
2668 | } | |
2669 | #endif /* NEW_PROC_API */ | |
2670 | } | |
2671 | ||
2672 | /* Write the general-purpose registers back to the process or LWP | |
2673 | corresponding to PI. Return non-zero for success, zero for | |
2674 | failure. */ | |
2675 | ||
2676 | int | |
2677 | proc_set_gregs (procinfo *pi) | |
2678 | { | |
2679 | gdb_gregset_t *gregs; | |
2680 | int win; | |
2681 | ||
2682 | gregs = proc_get_gregs (pi); | |
2683 | if (gregs == NULL) | |
2684 | return 0; /* proc_get_regs has already warned. */ | |
2685 | ||
2686 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) | |
2687 | { | |
2688 | return 0; | |
2689 | } | |
2690 | else | |
2691 | { | |
2692 | #ifdef NEW_PROC_API | |
2693 | struct { | |
2694 | procfs_ctl_t cmd; | |
2695 | /* Use char array to avoid alignment issues. */ | |
2696 | char gregs[sizeof (gdb_gregset_t)]; | |
2697 | } arg; | |
2698 | ||
2699 | arg.cmd = PCSREG; | |
2700 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2701 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2702 | #else | |
2703 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2704 | #endif | |
2705 | } | |
2706 | ||
2707 | /* Policy: writing the registers invalidates our cache. */ | |
2708 | pi->gregs_valid = 0; | |
2709 | return win; | |
2710 | } | |
2711 | ||
2712 | /* Write the floating-pointer registers back to the process or LWP | |
2713 | corresponding to PI. Return non-zero for success, zero for | |
2714 | failure. */ | |
2715 | ||
2716 | int | |
2717 | proc_set_fpregs (procinfo *pi) | |
2718 | { | |
2719 | gdb_fpregset_t *fpregs; | |
2720 | int win; | |
2721 | ||
2722 | fpregs = proc_get_fpregs (pi); | |
2723 | if (fpregs == NULL) | |
2724 | return 0; /* proc_get_fpregs has already warned. */ | |
2725 | ||
2726 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) | |
2727 | { | |
2728 | return 0; | |
2729 | } | |
2730 | else | |
2731 | { | |
2732 | #ifdef NEW_PROC_API | |
2733 | struct { | |
2734 | procfs_ctl_t cmd; | |
2735 | /* Use char array to avoid alignment issues. */ | |
2736 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2737 | } arg; | |
2738 | ||
2739 | arg.cmd = PCSFPREG; | |
2740 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2741 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2742 | #else | |
2743 | # ifdef PIOCTSFPREG | |
2744 | if (pi->tid == 0) | |
2745 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2746 | else | |
2747 | { | |
2748 | struct { | |
2749 | long pr_count; | |
2750 | tid_t pr_error_thread; | |
2751 | tfpregset_t thread_1; | |
2752 | } thread_fpregs; | |
2753 | ||
2754 | thread_fpregs.pr_count = 1; | |
2755 | thread_fpregs.thread_1.tid = pi->tid; | |
2756 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2757 | sizeof (*fpregs)); | |
2758 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2759 | } | |
2760 | # else | |
2761 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2762 | # endif | |
2763 | #endif /* NEW_PROC_API */ | |
2764 | } | |
2765 | ||
2766 | /* Policy: writing the registers invalidates our cache. */ | |
2767 | pi->fpregs_valid = 0; | |
2768 | return win; | |
2769 | } | |
2770 | ||
2771 | /* | |
2772 | * Function: proc_kill | |
2773 | * | |
2774 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2775 | * Returns non-zero for success, zero for failure. | |
2776 | */ | |
2777 | ||
2778 | int | |
2779 | proc_kill (procinfo *pi, int signo) | |
2780 | { | |
2781 | int win; | |
2782 | ||
2783 | /* | |
2784 | * We might conceivably apply this operation to an LWP, and | |
2785 | * the LWP's ctl file descriptor might not be open. | |
2786 | */ | |
2787 | ||
2788 | if (pi->ctl_fd == 0 && | |
2789 | open_procinfo_files (pi, FD_CTL) == 0) | |
2790 | { | |
2791 | return 0; | |
2792 | } | |
2793 | else | |
2794 | { | |
2795 | #ifdef NEW_PROC_API | |
2796 | procfs_ctl_t cmd[2]; | |
2797 | ||
2798 | cmd[0] = PCKILL; | |
2799 | cmd[1] = signo; | |
2800 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2801 | #else /* ioctl method */ | |
2802 | /* FIXME: do I need the Alpha OSF fixups present in | |
2803 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2804 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2805 | #endif | |
2806 | } | |
2807 | ||
2808 | return win; | |
2809 | } | |
2810 | ||
2811 | /* | |
2812 | * Function: proc_parent_pid | |
2813 | * | |
2814 | * Find the pid of the process that started this one. | |
2815 | * Returns the parent process pid, or zero. | |
2816 | */ | |
2817 | ||
2818 | int | |
2819 | proc_parent_pid (procinfo *pi) | |
2820 | { | |
2821 | /* | |
2822 | * We should never have to apply this operation to any procinfo | |
2823 | * except the one for the main process. If that ever changes | |
2824 | * for any reason, then take out the following clause and | |
2825 | * replace it with one that makes sure the ctl_fd is open. | |
2826 | */ | |
2827 | ||
2828 | if (pi->tid != 0) | |
2829 | pi = find_procinfo_or_die (pi->pid, 0); | |
2830 | ||
2831 | if (!pi->status_valid) | |
2832 | if (!proc_get_status (pi)) | |
2833 | return 0; | |
2834 | ||
2835 | return pi->prstatus.pr_ppid; | |
2836 | } | |
2837 | ||
2838 | ||
2839 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address | |
2840 | (a.k.a void pointer)! */ | |
2841 | ||
2842 | static void * | |
2843 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2844 | { | |
2845 | void *ptr; | |
2846 | ||
2847 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr)); | |
2848 | gdbarch_address_to_pointer (current_gdbarch, builtin_type_void_data_ptr, | |
2849 | &ptr, addr); | |
2850 | return ptr; | |
2851 | } | |
2852 | ||
2853 | /* | |
2854 | * Function: proc_set_watchpoint | |
2855 | * | |
2856 | */ | |
2857 | ||
2858 | int | |
2859 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) | |
2860 | { | |
2861 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2862 | return 0; | |
2863 | #else | |
2864 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2865 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2866 | return 0; | |
2867 | #else | |
2868 | struct { | |
2869 | procfs_ctl_t cmd; | |
2870 | char watch[sizeof (prwatch_t)]; | |
2871 | } arg; | |
2872 | prwatch_t *pwatch; | |
2873 | ||
2874 | pwatch = (prwatch_t *) &arg.watch; | |
2875 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to | |
2876 | convert a target address into something that can be stored in a | |
2877 | native data structure. */ | |
2878 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ | |
2879 | pwatch->pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); | |
2880 | #else | |
2881 | pwatch->pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); | |
2882 | #endif | |
2883 | pwatch->pr_size = len; | |
2884 | pwatch->pr_wflags = wflags; | |
2885 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2886 | arg.cmd = PCWATCH; | |
2887 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2888 | #else | |
2889 | #if defined (PIOCSWATCH) | |
2890 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2891 | #else | |
2892 | return 0; /* Fail */ | |
2893 | #endif | |
2894 | #endif | |
2895 | #endif | |
2896 | #endif | |
2897 | } | |
2898 | ||
2899 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ | |
2900 | ||
2901 | #include <sys/sysi86.h> | |
2902 | ||
2903 | /* | |
2904 | * Function: proc_get_LDT_entry | |
2905 | * | |
2906 | * Inputs: | |
2907 | * procinfo *pi; | |
2908 | * int key; | |
2909 | * | |
2910 | * The 'key' is actually the value of the lower 16 bits of | |
2911 | * the GS register for the LWP that we're interested in. | |
2912 | * | |
2913 | * Return: matching ssh struct (LDT entry). | |
2914 | */ | |
2915 | ||
2916 | struct ssd * | |
2917 | proc_get_LDT_entry (procinfo *pi, int key) | |
2918 | { | |
2919 | static struct ssd *ldt_entry = NULL; | |
2920 | #ifdef NEW_PROC_API | |
2921 | char pathname[MAX_PROC_NAME_SIZE]; | |
2922 | struct cleanup *old_chain = NULL; | |
2923 | int fd; | |
2924 | ||
2925 | /* Allocate space for one LDT entry. | |
2926 | This alloc must persist, because we return a pointer to it. */ | |
2927 | if (ldt_entry == NULL) | |
2928 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2929 | ||
2930 | /* Open the file descriptor for the LDT table. */ | |
2931 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
2932 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) | |
2933 | { | |
2934 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); | |
2935 | return NULL; | |
2936 | } | |
2937 | /* Make sure it gets closed again! */ | |
2938 | old_chain = make_cleanup_close (fd); | |
2939 | ||
2940 | /* Now 'read' thru the table, find a match and return it. */ | |
2941 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
2942 | { | |
2943 | if (ldt_entry->sel == 0 && | |
2944 | ldt_entry->bo == 0 && | |
2945 | ldt_entry->acc1 == 0 && | |
2946 | ldt_entry->acc2 == 0) | |
2947 | break; /* end of table */ | |
2948 | /* If key matches, return this entry. */ | |
2949 | if (ldt_entry->sel == key) | |
2950 | return ldt_entry; | |
2951 | } | |
2952 | /* Loop ended, match not found. */ | |
2953 | return NULL; | |
2954 | #else | |
2955 | int nldt, i; | |
2956 | static int nalloc = 0; | |
2957 | ||
2958 | /* Get the number of LDT entries. */ | |
2959 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
2960 | { | |
2961 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); | |
2962 | return NULL; | |
2963 | } | |
2964 | ||
2965 | /* Allocate space for the number of LDT entries. */ | |
2966 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2967 | if (nldt > nalloc) | |
2968 | { | |
2969 | ldt_entry = (struct ssd *) | |
2970 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
2971 | nalloc = nldt; | |
2972 | } | |
2973 | ||
2974 | /* Read the whole table in one gulp. */ | |
2975 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2976 | { | |
2977 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2978 | return NULL; | |
2979 | } | |
2980 | ||
2981 | /* Search the table and return the (first) entry matching 'key'. */ | |
2982 | for (i = 0; i < nldt; i++) | |
2983 | if (ldt_entry[i].sel == key) | |
2984 | return &ldt_entry[i]; | |
2985 | ||
2986 | /* Loop ended, match not found. */ | |
2987 | return NULL; | |
2988 | #endif | |
2989 | } | |
2990 | ||
2991 | #endif /* TM_I386SOL2_H */ | |
2992 | ||
2993 | /* =============== END, non-thread part of /proc "MODULE" =============== */ | |
2994 | ||
2995 | /* =================== Thread "MODULE" =================== */ | |
2996 | ||
2997 | /* NOTE: you'll see more ifdefs and duplication of functions here, | |
2998 | since there is a different way to do threads on every OS. */ | |
2999 | ||
3000 | /* | |
3001 | * Function: proc_get_nthreads | |
3002 | * | |
3003 | * Return the number of threads for the process | |
3004 | */ | |
3005 | ||
3006 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3007 | /* | |
3008 | * OSF version | |
3009 | */ | |
3010 | int | |
3011 | proc_get_nthreads (procinfo *pi) | |
3012 | { | |
3013 | int nthreads = 0; | |
3014 | ||
3015 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) | |
3016 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
3017 | ||
3018 | return nthreads; | |
3019 | } | |
3020 | ||
3021 | #else | |
3022 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3023 | /* | |
3024 | * Solaris and Unixware version | |
3025 | */ | |
3026 | int | |
3027 | proc_get_nthreads (procinfo *pi) | |
3028 | { | |
3029 | if (!pi->status_valid) | |
3030 | if (!proc_get_status (pi)) | |
3031 | return 0; | |
3032 | ||
3033 | /* | |
3034 | * NEW_PROC_API: only works for the process procinfo, | |
3035 | * because the LWP procinfos do not get prstatus filled in. | |
3036 | */ | |
3037 | #ifdef NEW_PROC_API | |
3038 | if (pi->tid != 0) /* find the parent process procinfo */ | |
3039 | pi = find_procinfo_or_die (pi->pid, 0); | |
3040 | #endif | |
3041 | return pi->prstatus.pr_nlwp; | |
3042 | } | |
3043 | ||
3044 | #else | |
3045 | /* | |
3046 | * Default version | |
3047 | */ | |
3048 | int | |
3049 | proc_get_nthreads (procinfo *pi) | |
3050 | { | |
3051 | return 0; | |
3052 | } | |
3053 | #endif | |
3054 | #endif | |
3055 | ||
3056 | /* | |
3057 | * Function: proc_get_current_thread (LWP version) | |
3058 | * | |
3059 | * Return the ID of the thread that had an event of interest. | |
3060 | * (ie. the one that hit a breakpoint or other traced event). | |
3061 | * All other things being equal, this should be the ID of a | |
3062 | * thread that is currently executing. | |
3063 | */ | |
3064 | ||
3065 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3066 | /* | |
3067 | * Solaris and Unixware version | |
3068 | */ | |
3069 | int | |
3070 | proc_get_current_thread (procinfo *pi) | |
3071 | { | |
3072 | /* | |
3073 | * Note: this should be applied to the root procinfo for the process, | |
3074 | * not to the procinfo for an LWP. If applied to the procinfo for | |
3075 | * an LWP, it will simply return that LWP's ID. In that case, | |
3076 | * find the parent process procinfo. | |
3077 | */ | |
3078 | ||
3079 | if (pi->tid != 0) | |
3080 | pi = find_procinfo_or_die (pi->pid, 0); | |
3081 | ||
3082 | if (!pi->status_valid) | |
3083 | if (!proc_get_status (pi)) | |
3084 | return 0; | |
3085 | ||
3086 | #ifdef NEW_PROC_API | |
3087 | return pi->prstatus.pr_lwp.pr_lwpid; | |
3088 | #else | |
3089 | return pi->prstatus.pr_who; | |
3090 | #endif | |
3091 | } | |
3092 | ||
3093 | #else | |
3094 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3095 | /* | |
3096 | * OSF version | |
3097 | */ | |
3098 | int | |
3099 | proc_get_current_thread (procinfo *pi) | |
3100 | { | |
3101 | #if 0 /* FIXME: not ready for prime time? */ | |
3102 | return pi->prstatus.pr_tid; | |
3103 | #else | |
3104 | return 0; | |
3105 | #endif | |
3106 | } | |
3107 | ||
3108 | #else | |
3109 | /* | |
3110 | * Default version | |
3111 | */ | |
3112 | int | |
3113 | proc_get_current_thread (procinfo *pi) | |
3114 | { | |
3115 | return 0; | |
3116 | } | |
3117 | ||
3118 | #endif | |
3119 | #endif | |
3120 | ||
3121 | /* | |
3122 | * Function: proc_update_threads | |
3123 | * | |
3124 | * Discover the IDs of all the threads within the process, and | |
3125 | * create a procinfo for each of them (chained to the parent). | |
3126 | * | |
3127 | * This unfortunately requires a different method on every OS. | |
3128 | * | |
3129 | * Return: non-zero for success, zero for failure. | |
3130 | */ | |
3131 | ||
3132 | int | |
3133 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) | |
3134 | { | |
3135 | if (thread && parent) /* sanity */ | |
3136 | { | |
3137 | thread->status_valid = 0; | |
3138 | if (!proc_get_status (thread)) | |
3139 | destroy_one_procinfo (&parent->thread_list, thread); | |
3140 | } | |
3141 | return 0; /* keep iterating */ | |
3142 | } | |
3143 | ||
3144 | #if defined (PIOCLSTATUS) | |
3145 | /* | |
3146 | * Solaris 2.5 (ioctl) version | |
3147 | */ | |
3148 | int | |
3149 | proc_update_threads (procinfo *pi) | |
3150 | { | |
3151 | gdb_prstatus_t *prstatus; | |
3152 | struct cleanup *old_chain = NULL; | |
3153 | procinfo *thread; | |
3154 | int nlwp, i; | |
3155 | ||
3156 | /* | |
3157 | * We should never have to apply this operation to any procinfo | |
3158 | * except the one for the main process. If that ever changes | |
3159 | * for any reason, then take out the following clause and | |
3160 | * replace it with one that makes sure the ctl_fd is open. | |
3161 | */ | |
3162 | ||
3163 | if (pi->tid != 0) | |
3164 | pi = find_procinfo_or_die (pi->pid, 0); | |
3165 | ||
3166 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3167 | ||
3168 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3169 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3170 | ||
3171 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); | |
3172 | ||
3173 | old_chain = make_cleanup (xfree, prstatus); | |
3174 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) | |
3175 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3176 | ||
3177 | /* Skip element zero, which represents the process as a whole. */ | |
3178 | for (i = 1; i < nlwp + 1; i++) | |
3179 | { | |
3180 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3181 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3182 | ||
3183 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); | |
3184 | thread->status_valid = 1; | |
3185 | } | |
3186 | pi->threads_valid = 1; | |
3187 | do_cleanups (old_chain); | |
3188 | return 1; | |
3189 | } | |
3190 | #else | |
3191 | #ifdef NEW_PROC_API | |
3192 | /* | |
3193 | * Unixware and Solaris 6 (and later) version | |
3194 | */ | |
3195 | static void | |
3196 | do_closedir_cleanup (void *dir) | |
3197 | { | |
3198 | closedir (dir); | |
3199 | } | |
3200 | ||
3201 | int | |
3202 | proc_update_threads (procinfo *pi) | |
3203 | { | |
3204 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3205 | struct dirent *direntry; | |
3206 | struct cleanup *old_chain = NULL; | |
3207 | procinfo *thread; | |
3208 | DIR *dirp; | |
3209 | int lwpid; | |
3210 | ||
3211 | /* | |
3212 | * We should never have to apply this operation to any procinfo | |
3213 | * except the one for the main process. If that ever changes | |
3214 | * for any reason, then take out the following clause and | |
3215 | * replace it with one that makes sure the ctl_fd is open. | |
3216 | */ | |
3217 | ||
3218 | if (pi->tid != 0) | |
3219 | pi = find_procinfo_or_die (pi->pid, 0); | |
3220 | ||
3221 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3222 | ||
3223 | /* | |
3224 | * Unixware | |
3225 | * | |
3226 | * Note: this brute-force method is the only way I know of | |
3227 | * to accomplish this task on Unixware. This method will | |
3228 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3229 | * and more elegant way to do this on Solaris, but the margins | |
3230 | * of this manuscript are too small to write it here... ;-) | |
3231 | */ | |
3232 | ||
3233 | strcpy (pathname, pi->pathname); | |
3234 | strcat (pathname, "/lwp"); | |
3235 | if ((dirp = opendir (pathname)) == NULL) | |
3236 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3237 | ||
3238 | old_chain = make_cleanup (do_closedir_cleanup, dirp); | |
3239 | while ((direntry = readdir (dirp)) != NULL) | |
3240 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3241 | { | |
3242 | lwpid = atoi (&direntry->d_name[0]); | |
3243 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3244 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3245 | } | |
3246 | pi->threads_valid = 1; | |
3247 | do_cleanups (old_chain); | |
3248 | return 1; | |
3249 | } | |
3250 | #else | |
3251 | #ifdef PIOCTLIST | |
3252 | /* | |
3253 | * OSF version | |
3254 | */ | |
3255 | int | |
3256 | proc_update_threads (procinfo *pi) | |
3257 | { | |
3258 | int nthreads, i; | |
3259 | tid_t *threads; | |
3260 | ||
3261 | /* | |
3262 | * We should never have to apply this operation to any procinfo | |
3263 | * except the one for the main process. If that ever changes | |
3264 | * for any reason, then take out the following clause and | |
3265 | * replace it with one that makes sure the ctl_fd is open. | |
3266 | */ | |
3267 | ||
3268 | if (pi->tid != 0) | |
3269 | pi = find_procinfo_or_die (pi->pid, 0); | |
3270 | ||
3271 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3272 | ||
3273 | nthreads = proc_get_nthreads (pi); | |
3274 | if (nthreads < 2) | |
3275 | return 0; /* nothing to do for 1 or fewer threads */ | |
3276 | ||
3277 | threads = xmalloc (nthreads * sizeof (tid_t)); | |
3278 | ||
3279 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3280 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3281 | ||
3282 | for (i = 0; i < nthreads; i++) | |
3283 | { | |
3284 | if (!find_procinfo (pi->pid, threads[i])) | |
3285 | if (!create_procinfo (pi->pid, threads[i])) | |
3286 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3287 | } | |
3288 | pi->threads_valid = 1; | |
3289 | return 1; | |
3290 | } | |
3291 | #else | |
3292 | /* | |
3293 | * Default version | |
3294 | */ | |
3295 | int | |
3296 | proc_update_threads (procinfo *pi) | |
3297 | { | |
3298 | return 0; | |
3299 | } | |
3300 | #endif /* OSF PIOCTLIST */ | |
3301 | #endif /* NEW_PROC_API */ | |
3302 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
3303 | ||
3304 | /* | |
3305 | * Function: proc_iterate_over_threads | |
3306 | * | |
3307 | * Description: | |
3308 | * Given a pointer to a function, call that function once | |
3309 | * for each lwp in the procinfo list, until the function | |
3310 | * returns non-zero, in which event return the value | |
3311 | * returned by the function. | |
3312 | * | |
3313 | * Note: this function does NOT call update_threads. | |
3314 | * If you want to discover new threads first, you must | |
3315 | * call that function explicitly. This function just makes | |
3316 | * a quick pass over the currently-known procinfos. | |
3317 | * | |
3318 | * Arguments: | |
3319 | * pi - parent process procinfo | |
3320 | * func - per-thread function | |
3321 | * ptr - opaque parameter for function. | |
3322 | * | |
3323 | * Return: | |
3324 | * First non-zero return value from the callee, or zero. | |
3325 | */ | |
3326 | ||
3327 | int | |
3328 | proc_iterate_over_threads (procinfo *pi, | |
3329 | int (*func) (procinfo *, procinfo *, void *), | |
3330 | void *ptr) | |
3331 | { | |
3332 | procinfo *thread, *next; | |
3333 | int retval = 0; | |
3334 | ||
3335 | /* | |
3336 | * We should never have to apply this operation to any procinfo | |
3337 | * except the one for the main process. If that ever changes | |
3338 | * for any reason, then take out the following clause and | |
3339 | * replace it with one that makes sure the ctl_fd is open. | |
3340 | */ | |
3341 | ||
3342 | if (pi->tid != 0) | |
3343 | pi = find_procinfo_or_die (pi->pid, 0); | |
3344 | ||
3345 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
3346 | { | |
3347 | next = thread->next; /* in case thread is destroyed */ | |
3348 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3349 | break; | |
3350 | } | |
3351 | ||
3352 | return retval; | |
3353 | } | |
3354 | ||
3355 | /* =================== END, Thread "MODULE" =================== */ | |
3356 | ||
3357 | /* =================== END, /proc "MODULE" =================== */ | |
3358 | ||
3359 | /* =================== GDB "MODULE" =================== */ | |
3360 | ||
3361 | /* | |
3362 | * Here are all of the gdb target vector functions and their friends. | |
3363 | */ | |
3364 | ||
3365 | static ptid_t do_attach (ptid_t ptid); | |
3366 | static void do_detach (int signo); | |
3367 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); | |
3368 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, | |
3369 | int entry_or_exit, int mode, int from_tty); | |
3370 | static int insert_dbx_link_breakpoint (procinfo *pi); | |
3371 | static void remove_dbx_link_breakpoint (void); | |
3372 | ||
3373 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3374 | the startup phase. The following two variables are used to record | |
3375 | the address of the breakpoint, and the code that was replaced by | |
3376 | a breakpoint. */ | |
3377 | static int dbx_link_bpt_addr = 0; | |
3378 | static void *dbx_link_bpt; | |
3379 | ||
3380 | /* | |
3381 | * Function: procfs_debug_inferior | |
3382 | * | |
3383 | * Sets up the inferior to be debugged. | |
3384 | * Registers to trace signals, hardware faults, and syscalls. | |
3385 | * Note: does not set RLC flag: caller may want to customize that. | |
3386 | * | |
3387 | * Returns: zero for success (note! unlike most functions in this module) | |
3388 | * On failure, returns the LINE NUMBER where it failed! | |
3389 | */ | |
3390 | ||
3391 | static int | |
3392 | procfs_debug_inferior (procinfo *pi) | |
3393 | { | |
3394 | fltset_t traced_faults; | |
3395 | gdb_sigset_t traced_signals; | |
3396 | sysset_t *traced_syscall_entries; | |
3397 | sysset_t *traced_syscall_exits; | |
3398 | int status; | |
3399 | ||
3400 | #ifdef PROCFS_DONT_TRACE_FAULTS | |
3401 | /* On some systems (OSF), we don't trace hardware faults. | |
3402 | Apparently it's enough that we catch them as signals. | |
3403 | Wonder why we don't just do that in general? */ | |
3404 | premptyset (&traced_faults); /* don't trace faults. */ | |
3405 | #else | |
3406 | /* Register to trace hardware faults in the child. */ | |
3407 | prfillset (&traced_faults); /* trace all faults... */ | |
3408 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3409 | #endif | |
3410 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3411 | return __LINE__; | |
3412 | ||
3413 | /* Register to trace selected signals in the child. */ | |
3414 | premptyset (&traced_signals); | |
3415 | if (!register_gdb_signals (pi, &traced_signals)) | |
3416 | return __LINE__; | |
3417 | ||
3418 | ||
3419 | /* Register to trace the 'exit' system call (on entry). */ | |
3420 | traced_syscall_entries = sysset_t_alloc (pi); | |
3421 | gdb_premptysysset (traced_syscall_entries); | |
3422 | #ifdef SYS_exit | |
3423 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3424 | #endif | |
3425 | #ifdef SYS_lwpexit | |
3426 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ | |
3427 | #endif | |
3428 | #ifdef SYS_lwp_exit | |
3429 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); | |
3430 | #endif | |
3431 | #ifdef DYNAMIC_SYSCALLS | |
3432 | { | |
3433 | int callnum = find_syscall (pi, "_exit"); | |
3434 | if (callnum >= 0) | |
3435 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3436 | } | |
3437 | #endif | |
3438 | ||
3439 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); | |
3440 | xfree (traced_syscall_entries); | |
3441 | if (!status) | |
3442 | return __LINE__; | |
3443 | ||
3444 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3445 | /* OSF method for tracing exec syscalls. Quoting: | |
3446 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3447 | exits from exec system calls because of the user level loader. */ | |
3448 | /* FIXME: make nice and maybe move into an access function. */ | |
3449 | { | |
3450 | int prfs_flags; | |
3451 | ||
3452 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3453 | return __LINE__; | |
3454 | ||
3455 | prfs_flags |= PRFS_STOPEXEC; | |
3456 | ||
3457 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3458 | return __LINE__; | |
3459 | } | |
3460 | #else /* not PRFS_STOPEXEC */ | |
3461 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3462 | /* GW: Rationale... | |
3463 | Not all systems with /proc have all the exec* syscalls with the same | |
3464 | names. On the SGI, for example, there is no SYS_exec, but there | |
3465 | *is* a SYS_execv. So, we try to account for that. */ | |
3466 | ||
3467 | traced_syscall_exits = sysset_t_alloc (pi); | |
3468 | gdb_premptysysset (traced_syscall_exits); | |
3469 | #ifdef SYS_exec | |
3470 | gdb_praddsysset (traced_syscall_exits, SYS_exec); | |
3471 | #endif | |
3472 | #ifdef SYS_execve | |
3473 | gdb_praddsysset (traced_syscall_exits, SYS_execve); | |
3474 | #endif | |
3475 | #ifdef SYS_execv | |
3476 | gdb_praddsysset (traced_syscall_exits, SYS_execv); | |
3477 | #endif | |
3478 | ||
3479 | #ifdef SYS_lwpcreate | |
3480 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); | |
3481 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
3482 | #endif | |
3483 | ||
3484 | #ifdef SYS_lwp_create /* FIXME: once only, please */ | |
3485 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); | |
3486 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
3487 | #endif | |
3488 | ||
3489 | #ifdef DYNAMIC_SYSCALLS | |
3490 | { | |
3491 | int callnum = find_syscall (pi, "execve"); | |
3492 | if (callnum >= 0) | |
3493 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3494 | callnum = find_syscall (pi, "ra_execve"); | |
3495 | if (callnum >= 0) | |
3496 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3497 | } | |
3498 | #endif | |
3499 | ||
3500 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); | |
3501 | xfree (traced_syscall_exits); | |
3502 | if (!status) | |
3503 | return __LINE__; | |
3504 | ||
3505 | #endif /* PRFS_STOPEXEC */ | |
3506 | return 0; | |
3507 | } | |
3508 | ||
3509 | static void | |
3510 | procfs_attach (char *args, int from_tty) | |
3511 | { | |
3512 | char *exec_file; | |
3513 | int pid; | |
3514 | ||
3515 | if (!args) | |
3516 | error_no_arg (_("process-id to attach")); | |
3517 | ||
3518 | pid = atoi (args); | |
3519 | if (pid == getpid ()) | |
3520 | error (_("Attaching GDB to itself is not a good idea...")); | |
3521 | ||
3522 | if (from_tty) | |
3523 | { | |
3524 | exec_file = get_exec_file (0); | |
3525 | ||
3526 | if (exec_file) | |
3527 | printf_filtered (_("Attaching to program `%s', %s\n"), | |
3528 | exec_file, target_pid_to_str (pid_to_ptid (pid))); | |
3529 | else | |
3530 | printf_filtered (_("Attaching to %s\n"), | |
3531 | target_pid_to_str (pid_to_ptid (pid))); | |
3532 | ||
3533 | fflush (stdout); | |
3534 | } | |
3535 | inferior_ptid = do_attach (pid_to_ptid (pid)); | |
3536 | push_target (&procfs_ops); | |
3537 | } | |
3538 | ||
3539 | static void | |
3540 | procfs_detach (char *args, int from_tty) | |
3541 | { | |
3542 | int sig = 0; | |
3543 | ||
3544 | if (args) | |
3545 | sig = atoi (args); | |
3546 | ||
3547 | if (from_tty) | |
3548 | { | |
3549 | int pid = PIDGET (inferior_ptid); | |
3550 | char *exec_file; | |
3551 | ||
3552 | exec_file = get_exec_file (0); | |
3553 | if (exec_file == NULL) | |
3554 | exec_file = ""; | |
3555 | ||
3556 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, | |
3557 | target_pid_to_str (pid_to_ptid (pid))); | |
3558 | gdb_flush (gdb_stdout); | |
3559 | } | |
3560 | ||
3561 | do_detach (sig); | |
3562 | ||
3563 | inferior_ptid = null_ptid; | |
3564 | unpush_target (&procfs_ops); | |
3565 | } | |
3566 | ||
3567 | static ptid_t | |
3568 | do_attach (ptid_t ptid) | |
3569 | { | |
3570 | procinfo *pi; | |
3571 | int fail; | |
3572 | ||
3573 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) | |
3574 | perror (_("procfs: out of memory in 'attach'")); | |
3575 | ||
3576 | if (!open_procinfo_files (pi, FD_CTL)) | |
3577 | { | |
3578 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3579 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
3580 | PIDGET (ptid)); | |
3581 | dead_procinfo (pi, errmsg, NOKILL); | |
3582 | } | |
3583 | ||
3584 | /* Stop the process (if it isn't already stopped). */ | |
3585 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
3586 | { | |
3587 | pi->was_stopped = 1; | |
3588 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
3589 | } | |
3590 | else | |
3591 | { | |
3592 | pi->was_stopped = 0; | |
3593 | /* Set the process to run again when we close it. */ | |
3594 | if (!proc_set_run_on_last_close (pi)) | |
3595 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3596 | ||
3597 | /* Now stop the process. */ | |
3598 | if (!proc_stop_process (pi)) | |
3599 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3600 | pi->ignore_next_sigstop = 1; | |
3601 | } | |
3602 | /* Save some of the /proc state to be restored if we detach. */ | |
3603 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3604 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3605 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3606 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
3607 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) | |
3608 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", | |
3609 | NOKILL); | |
3610 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) | |
3611 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", | |
3612 | NOKILL); | |
3613 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3614 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3615 | ||
3616 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3617 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3618 | ||
3619 | /* Let GDB know that the inferior was attached. */ | |
3620 | attach_flag = 1; | |
3621 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3622 | } | |
3623 | ||
3624 | static void | |
3625 | do_detach (int signo) | |
3626 | { | |
3627 | procinfo *pi; | |
3628 | ||
3629 | /* Find procinfo for the main process */ | |
3630 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ | |
3631 | if (signo) | |
3632 | if (!proc_set_current_signal (pi, signo)) | |
3633 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
3634 | ||
3635 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) | |
3636 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
3637 | ||
3638 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) | |
3639 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3640 | ||
3641 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) | |
3642 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); | |
3643 | ||
3644 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) | |
3645 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); | |
3646 | ||
3647 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3648 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3649 | ||
3650 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3651 | if (signo || !(pi->was_stopped) || | |
3652 | query (_("Was stopped when attached, make it runnable again? "))) | |
3653 | { | |
3654 | /* Clear any pending signal. */ | |
3655 | if (!proc_clear_current_fault (pi)) | |
3656 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3657 | ||
3658 | if (signo == 0 && !proc_clear_current_signal (pi)) | |
3659 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3660 | ||
3661 | if (!proc_set_run_on_last_close (pi)) | |
3662 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3663 | } | |
3664 | ||
3665 | attach_flag = 0; | |
3666 | destroy_procinfo (pi); | |
3667 | } | |
3668 | ||
3669 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this | |
3670 | for all registers. | |
3671 | ||
3672 | ??? Is the following note still relevant? We can't get individual | |
3673 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3674 | don't bother with caching at all in that case. | |
3675 | ||
3676 | NOTE: Since the /proc interface cannot give us individual | |
3677 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3678 | This results in the possibility that we will do unnecessarily many | |
3679 | fetches, since we may be called repeatedly for individual | |
3680 | registers. So we cache the results, and mark the cache invalid | |
3681 | when the process is resumed. */ | |
3682 | ||
3683 | static void | |
3684 | procfs_fetch_registers (struct regcache *regcache, int regnum) | |
3685 | { | |
3686 | gdb_gregset_t *gregs; | |
3687 | procinfo *pi; | |
3688 | int pid = PIDGET (inferior_ptid); | |
3689 | int tid = TIDGET (inferior_ptid); | |
3690 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
3691 | ||
3692 | /* First look up procinfo for the main process. */ | |
3693 | pi = find_procinfo_or_die (pid, 0); | |
3694 | ||
3695 | /* If the event thread is not the same as GDB's requested thread | |
3696 | (ie. inferior_ptid), then look up procinfo for the requested | |
3697 | thread. */ | |
3698 | if (tid != 0 && tid != proc_get_current_thread (pi)) | |
3699 | pi = find_procinfo_or_die (pid, tid); | |
3700 | ||
3701 | if (pi == NULL) | |
3702 | error (_("procfs: fetch_registers failed to find procinfo for %s"), | |
3703 | target_pid_to_str (inferior_ptid)); | |
3704 | ||
3705 | gregs = proc_get_gregs (pi); | |
3706 | if (gregs == NULL) | |
3707 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3708 | ||
3709 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); | |
3710 | ||
3711 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ | |
3712 | { | |
3713 | gdb_fpregset_t *fpregs; | |
3714 | ||
3715 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) | |
3716 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3717 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
3718 | return; /* Not a floating point register. */ | |
3719 | ||
3720 | fpregs = proc_get_fpregs (pi); | |
3721 | if (fpregs == NULL) | |
3722 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
3723 | ||
3724 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); | |
3725 | } | |
3726 | } | |
3727 | ||
3728 | /* Get ready to modify the registers array. On machines which store | |
3729 | individual registers, this doesn't need to do anything. On | |
3730 | machines which store all the registers in one fell swoop, such as | |
3731 | /proc, this makes sure that registers contains all the registers | |
3732 | from the program being debugged. */ | |
3733 | ||
3734 | static void | |
3735 | procfs_prepare_to_store (struct regcache *regcache) | |
3736 | { | |
3737 | } | |
3738 | ||
3739 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
3740 | this for all registers. | |
3741 | ||
3742 | NOTE: Since the /proc interface will not read individual registers, | |
3743 | we will cache these requests until the process is resumed, and only | |
3744 | then write them back to the inferior process. | |
3745 | ||
3746 | FIXME: is that a really bad idea? Have to think about cases where | |
3747 | writing one register might affect the value of others, etc. */ | |
3748 | ||
3749 | static void | |
3750 | procfs_store_registers (struct regcache *regcache, int regnum) | |
3751 | { | |
3752 | gdb_gregset_t *gregs; | |
3753 | procinfo *pi; | |
3754 | int pid = PIDGET (inferior_ptid); | |
3755 | int tid = TIDGET (inferior_ptid); | |
3756 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
3757 | ||
3758 | /* First find procinfo for main process. */ | |
3759 | pi = find_procinfo_or_die (pid, 0); | |
3760 | ||
3761 | /* If the event thread is not the same as GDB's requested thread | |
3762 | (ie. inferior_ptid), then look up procinfo for the requested | |
3763 | thread. */ | |
3764 | if (tid != 0 && tid != proc_get_current_thread (pi)) | |
3765 | pi = find_procinfo_or_die (pid, tid); | |
3766 | ||
3767 | if (pi == NULL) | |
3768 | error (_("procfs: store_registers: failed to find procinfo for %s"), | |
3769 | target_pid_to_str (inferior_ptid)); | |
3770 | ||
3771 | gregs = proc_get_gregs (pi); | |
3772 | if (gregs == NULL) | |
3773 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
3774 | ||
3775 | fill_gregset (regcache, gregs, regnum); | |
3776 | if (!proc_set_gregs (pi)) | |
3777 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
3778 | ||
3779 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ | |
3780 | { | |
3781 | gdb_fpregset_t *fpregs; | |
3782 | ||
3783 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) | |
3784 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3785 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
3786 | return; /* Not a floating point register. */ | |
3787 | ||
3788 | fpregs = proc_get_fpregs (pi); | |
3789 | if (fpregs == NULL) | |
3790 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3791 | ||
3792 | fill_fpregset (regcache, fpregs, regnum); | |
3793 | if (!proc_set_fpregs (pi)) | |
3794 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3795 | } | |
3796 | } | |
3797 | ||
3798 | static int | |
3799 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3800 | { | |
3801 | ||
3802 | #ifdef SYS_lwp_exit | |
3803 | if (scall == SYS_lwp_exit) | |
3804 | return 1; | |
3805 | #endif | |
3806 | #ifdef SYS_lwpexit | |
3807 | if (scall == SYS_lwpexit) | |
3808 | return 1; | |
3809 | #endif | |
3810 | return 0; | |
3811 | } | |
3812 | ||
3813 | static int | |
3814 | syscall_is_exit (procinfo *pi, int scall) | |
3815 | { | |
3816 | #ifdef SYS_exit | |
3817 | if (scall == SYS_exit) | |
3818 | return 1; | |
3819 | #endif | |
3820 | #ifdef DYNAMIC_SYSCALLS | |
3821 | if (find_syscall (pi, "_exit") == scall) | |
3822 | return 1; | |
3823 | #endif | |
3824 | return 0; | |
3825 | } | |
3826 | ||
3827 | static int | |
3828 | syscall_is_exec (procinfo *pi, int scall) | |
3829 | { | |
3830 | #ifdef SYS_exec | |
3831 | if (scall == SYS_exec) | |
3832 | return 1; | |
3833 | #endif | |
3834 | #ifdef SYS_execv | |
3835 | if (scall == SYS_execv) | |
3836 | return 1; | |
3837 | #endif | |
3838 | #ifdef SYS_execve | |
3839 | if (scall == SYS_execve) | |
3840 | return 1; | |
3841 | #endif | |
3842 | #ifdef DYNAMIC_SYSCALLS | |
3843 | if (find_syscall (pi, "_execve")) | |
3844 | return 1; | |
3845 | if (find_syscall (pi, "ra_execve")) | |
3846 | return 1; | |
3847 | #endif | |
3848 | return 0; | |
3849 | } | |
3850 | ||
3851 | static int | |
3852 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3853 | { | |
3854 | #ifdef SYS_lwp_create | |
3855 | if (scall == SYS_lwp_create) | |
3856 | return 1; | |
3857 | #endif | |
3858 | #ifdef SYS_lwpcreate | |
3859 | if (scall == SYS_lwpcreate) | |
3860 | return 1; | |
3861 | #endif | |
3862 | return 0; | |
3863 | } | |
3864 | ||
3865 | /* | |
3866 | * Function: target_wait | |
3867 | * | |
3868 | * Retrieve the next stop event from the child process. | |
3869 | * If child has not stopped yet, wait for it to stop. | |
3870 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3871 | * into gdb internal event codes. | |
3872 | * | |
3873 | * Return: id of process (and possibly thread) that incurred the event. | |
3874 | * event codes are returned thru a pointer parameter. | |
3875 | */ | |
3876 | ||
3877 | static ptid_t | |
3878 | procfs_wait (ptid_t ptid, struct target_waitstatus *status) | |
3879 | { | |
3880 | /* First cut: loosely based on original version 2.1 */ | |
3881 | procinfo *pi; | |
3882 | int wstat; | |
3883 | int temp_tid; | |
3884 | ptid_t retval, temp_ptid; | |
3885 | int why, what, flags; | |
3886 | int retry = 0; | |
3887 | ||
3888 | wait_again: | |
3889 | ||
3890 | retry++; | |
3891 | wstat = 0; | |
3892 | retval = pid_to_ptid (-1); | |
3893 | ||
3894 | /* Find procinfo for main process */ | |
3895 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
3896 | if (pi) | |
3897 | { | |
3898 | /* We must assume that the status is stale now... */ | |
3899 | pi->status_valid = 0; | |
3900 | pi->gregs_valid = 0; | |
3901 | pi->fpregs_valid = 0; | |
3902 | ||
3903 | #if 0 /* just try this out... */ | |
3904 | flags = proc_flags (pi); | |
3905 | why = proc_why (pi); | |
3906 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3907 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3908 | #endif | |
3909 | /* If child is not stopped, wait for it to stop. */ | |
3910 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3911 | !proc_wait_for_stop (pi)) | |
3912 | { | |
3913 | /* wait_for_stop failed: has the child terminated? */ | |
3914 | if (errno == ENOENT) | |
3915 | { | |
3916 | int wait_retval; | |
3917 | ||
3918 | /* /proc file not found; presumably child has terminated. */ | |
3919 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ | |
3920 | ||
3921 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ | |
3922 | error (_("procfs: couldn't stop process %d: wait returned %d."), | |
3923 | PIDGET (inferior_ptid), wait_retval); | |
3924 | /* FIXME: might I not just use waitpid? | |
3925 | Or try find_procinfo to see if I know about this child? */ | |
3926 | retval = pid_to_ptid (wait_retval); | |
3927 | } | |
3928 | else if (errno == EINTR) | |
3929 | goto wait_again; | |
3930 | else | |
3931 | { | |
3932 | /* Unknown error from wait_for_stop. */ | |
3933 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
3934 | } | |
3935 | } | |
3936 | else | |
3937 | { | |
3938 | /* This long block is reached if either: | |
3939 | a) the child was already stopped, or | |
3940 | b) we successfully waited for the child with wait_for_stop. | |
3941 | This block will analyze the /proc status, and translate it | |
3942 | into a waitstatus for GDB. | |
3943 | ||
3944 | If we actually had to call wait because the /proc file | |
3945 | is gone (child terminated), then we skip this block, | |
3946 | because we already have a waitstatus. */ | |
3947 | ||
3948 | flags = proc_flags (pi); | |
3949 | why = proc_why (pi); | |
3950 | what = proc_what (pi); | |
3951 | ||
3952 | if (flags & (PR_STOPPED | PR_ISTOP)) | |
3953 | { | |
3954 | #ifdef PR_ASYNC | |
3955 | /* If it's running async (for single_thread control), | |
3956 | set it back to normal again. */ | |
3957 | if (flags & PR_ASYNC) | |
3958 | if (!proc_unset_async (pi)) | |
3959 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3960 | #endif | |
3961 | ||
3962 | if (info_verbose) | |
3963 | proc_prettyprint_why (why, what, 1); | |
3964 | ||
3965 | /* The 'pid' we will return to GDB is composed of | |
3966 | the process ID plus the lwp ID. */ | |
3967 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3968 | ||
3969 | switch (why) { | |
3970 | case PR_SIGNALLED: | |
3971 | wstat = (what << 8) | 0177; | |
3972 | break; | |
3973 | case PR_SYSENTRY: | |
3974 | if (syscall_is_lwp_exit (pi, what)) | |
3975 | { | |
3976 | printf_filtered (_("[%s exited]\n"), | |
3977 | target_pid_to_str (retval)); | |
3978 | delete_thread (retval); | |
3979 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3980 | return retval; | |
3981 | } | |
3982 | else if (syscall_is_exit (pi, what)) | |
3983 | { | |
3984 | /* Handle SYS_exit call only */ | |
3985 | /* Stopped at entry to SYS_exit. | |
3986 | Make it runnable, resume it, then use | |
3987 | the wait system call to get its exit code. | |
3988 | Proc_run_process always clears the current | |
3989 | fault and signal. | |
3990 | Then return its exit status. */ | |
3991 | pi->status_valid = 0; | |
3992 | wstat = 0; | |
3993 | /* FIXME: what we should do is return | |
3994 | TARGET_WAITKIND_SPURIOUS. */ | |
3995 | if (!proc_run_process (pi, 0, 0)) | |
3996 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3997 | if (attach_flag) | |
3998 | { | |
3999 | /* Don't call wait: simulate waiting for exit, | |
4000 | return a "success" exit code. Bogus: what if | |
4001 | it returns something else? */ | |
4002 | wstat = 0; | |
4003 | retval = inferior_ptid; /* ? ? ? */ | |
4004 | } | |
4005 | else | |
4006 | { | |
4007 | int temp = wait (&wstat); | |
4008 | ||
4009 | /* FIXME: shouldn't I make sure I get the right | |
4010 | event from the right process? If (for | |
4011 | instance) I have killed an earlier inferior | |
4012 | process but failed to clean up after it | |
4013 | somehow, I could get its termination event | |
4014 | here. */ | |
4015 | ||
4016 | /* If wait returns -1, that's what we return to GDB. */ | |
4017 | if (temp < 0) | |
4018 | retval = pid_to_ptid (temp); | |
4019 | } | |
4020 | } | |
4021 | else | |
4022 | { | |
4023 | printf_filtered (_("procfs: trapped on entry to ")); | |
4024 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4025 | printf_filtered ("\n"); | |
4026 | #ifndef PIOCSSPCACT | |
4027 | { | |
4028 | long i, nsysargs, *sysargs; | |
4029 | ||
4030 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4031 | (sysargs = proc_sysargs (pi)) != NULL) | |
4032 | { | |
4033 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); | |
4034 | for (i = 0; i < nsysargs; i++) | |
4035 | printf_filtered ("#%ld: 0x%08lx\n", | |
4036 | i, sysargs[i]); | |
4037 | } | |
4038 | ||
4039 | } | |
4040 | #endif | |
4041 | if (status) | |
4042 | { | |
4043 | /* How to exit gracefully, returning "unknown event" */ | |
4044 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4045 | return inferior_ptid; | |
4046 | } | |
4047 | else | |
4048 | { | |
4049 | /* How to keep going without returning to wfi: */ | |
4050 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4051 | goto wait_again; | |
4052 | } | |
4053 | } | |
4054 | break; | |
4055 | case PR_SYSEXIT: | |
4056 | if (syscall_is_exec (pi, what)) | |
4057 | { | |
4058 | /* Hopefully this is our own "fork-child" execing | |
4059 | the real child. Hoax this event into a trap, and | |
4060 | GDB will see the child about to execute its start | |
4061 | address. */ | |
4062 | wstat = (SIGTRAP << 8) | 0177; | |
4063 | } | |
4064 | #ifdef SYS_syssgi | |
4065 | else if (what == SYS_syssgi) | |
4066 | { | |
4067 | /* see if we can break on dbx_link(). If yes, then | |
4068 | we no longer need the SYS_syssgi notifications. */ | |
4069 | if (insert_dbx_link_breakpoint (pi)) | |
4070 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4071 | FLAG_RESET, 0); | |
4072 | ||
4073 | /* This is an internal event and should be transparent | |
4074 | to wfi, so resume the execution and wait again. See | |
4075 | comment in procfs_init_inferior() for more details. */ | |
4076 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4077 | goto wait_again; | |
4078 | } | |
4079 | #endif | |
4080 | else if (syscall_is_lwp_create (pi, what)) | |
4081 | { | |
4082 | /* | |
4083 | * This syscall is somewhat like fork/exec. | |
4084 | * We will get the event twice: once for the parent LWP, | |
4085 | * and once for the child. We should already know about | |
4086 | * the parent LWP, but the child will be new to us. So, | |
4087 | * whenever we get this event, if it represents a new | |
4088 | * thread, simply add the thread to the list. | |
4089 | */ | |
4090 | ||
4091 | /* If not in procinfo list, add it. */ | |
4092 | temp_tid = proc_get_current_thread (pi); | |
4093 | if (!find_procinfo (pi->pid, temp_tid)) | |
4094 | create_procinfo (pi->pid, temp_tid); | |
4095 | ||
4096 | temp_ptid = MERGEPID (pi->pid, temp_tid); | |
4097 | /* If not in GDB's thread list, add it. */ | |
4098 | if (!in_thread_list (temp_ptid)) | |
4099 | { | |
4100 | printf_filtered (_("[New %s]\n"), | |
4101 | target_pid_to_str (temp_ptid)); | |
4102 | add_thread (temp_ptid); | |
4103 | } | |
4104 | /* Return to WFI, but tell it to immediately resume. */ | |
4105 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4106 | return inferior_ptid; | |
4107 | } | |
4108 | else if (syscall_is_lwp_exit (pi, what)) | |
4109 | { | |
4110 | printf_filtered (_("[%s exited]\n"), | |
4111 | target_pid_to_str (retval)); | |
4112 | delete_thread (retval); | |
4113 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4114 | return retval; | |
4115 | } | |
4116 | else if (0) | |
4117 | { | |
4118 | /* FIXME: Do we need to handle SYS_sproc, | |
4119 | SYS_fork, or SYS_vfork here? The old procfs | |
4120 | seemed to use this event to handle threads on | |
4121 | older (non-LWP) systems, where I'm assuming | |
4122 | that threads were actually separate processes. | |
4123 | Irix, maybe? Anyway, low priority for now. */ | |
4124 | } | |
4125 | else | |
4126 | { | |
4127 | printf_filtered (_("procfs: trapped on exit from ")); | |
4128 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4129 | printf_filtered ("\n"); | |
4130 | #ifndef PIOCSSPCACT | |
4131 | { | |
4132 | long i, nsysargs, *sysargs; | |
4133 | ||
4134 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4135 | (sysargs = proc_sysargs (pi)) != NULL) | |
4136 | { | |
4137 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); | |
4138 | for (i = 0; i < nsysargs; i++) | |
4139 | printf_filtered ("#%ld: 0x%08lx\n", | |
4140 | i, sysargs[i]); | |
4141 | } | |
4142 | } | |
4143 | #endif | |
4144 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4145 | return inferior_ptid; | |
4146 | } | |
4147 | break; | |
4148 | case PR_REQUESTED: | |
4149 | #if 0 /* FIXME */ | |
4150 | wstat = (SIGSTOP << 8) | 0177; | |
4151 | break; | |
4152 | #else | |
4153 | if (retry < 5) | |
4154 | { | |
4155 | printf_filtered (_("Retry #%d:\n"), retry); | |
4156 | pi->status_valid = 0; | |
4157 | goto wait_again; | |
4158 | } | |
4159 | else | |
4160 | { | |
4161 | /* If not in procinfo list, add it. */ | |
4162 | temp_tid = proc_get_current_thread (pi); | |
4163 | if (!find_procinfo (pi->pid, temp_tid)) | |
4164 | create_procinfo (pi->pid, temp_tid); | |
4165 | ||
4166 | /* If not in GDB's thread list, add it. */ | |
4167 | temp_ptid = MERGEPID (pi->pid, temp_tid); | |
4168 | if (!in_thread_list (temp_ptid)) | |
4169 | { | |
4170 | printf_filtered (_("[New %s]\n"), | |
4171 | target_pid_to_str (temp_ptid)); | |
4172 | add_thread (temp_ptid); | |
4173 | } | |
4174 | ||
4175 | status->kind = TARGET_WAITKIND_STOPPED; | |
4176 | status->value.sig = 0; | |
4177 | return retval; | |
4178 | } | |
4179 | #endif | |
4180 | case PR_JOBCONTROL: | |
4181 | wstat = (what << 8) | 0177; | |
4182 | break; | |
4183 | case PR_FAULTED: | |
4184 | switch (what) { | |
4185 | #ifdef FLTWATCH | |
4186 | case FLTWATCH: | |
4187 | wstat = (SIGTRAP << 8) | 0177; | |
4188 | break; | |
4189 | #endif | |
4190 | #ifdef FLTKWATCH | |
4191 | case FLTKWATCH: | |
4192 | wstat = (SIGTRAP << 8) | 0177; | |
4193 | break; | |
4194 | #endif | |
4195 | /* FIXME: use si_signo where possible. */ | |
4196 | case FLTPRIV: | |
4197 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4198 | case FLTILL: | |
4199 | #endif | |
4200 | wstat = (SIGILL << 8) | 0177; | |
4201 | break; | |
4202 | case FLTBPT: | |
4203 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4204 | case FLTTRACE: | |
4205 | #endif | |
4206 | /* If we hit our __dbx_link() internal breakpoint, | |
4207 | then remove it. See comments in procfs_init_inferior() | |
4208 | for more details. */ | |
4209 | if (dbx_link_bpt_addr != 0 | |
4210 | && dbx_link_bpt_addr == read_pc ()) | |
4211 | remove_dbx_link_breakpoint (); | |
4212 | ||
4213 | wstat = (SIGTRAP << 8) | 0177; | |
4214 | break; | |
4215 | case FLTSTACK: | |
4216 | case FLTACCESS: | |
4217 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4218 | case FLTBOUNDS: | |
4219 | #endif | |
4220 | wstat = (SIGSEGV << 8) | 0177; | |
4221 | break; | |
4222 | case FLTIOVF: | |
4223 | case FLTIZDIV: | |
4224 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4225 | case FLTFPE: | |
4226 | #endif | |
4227 | wstat = (SIGFPE << 8) | 0177; | |
4228 | break; | |
4229 | case FLTPAGE: /* Recoverable page fault */ | |
4230 | default: /* FIXME: use si_signo if possible for fault */ | |
4231 | retval = pid_to_ptid (-1); | |
4232 | printf_filtered ("procfs:%d -- ", __LINE__); | |
4233 | printf_filtered (_("child stopped for unknown reason:\n")); | |
4234 | proc_prettyprint_why (why, what, 1); | |
4235 | error (_("... giving up...")); | |
4236 | break; | |
4237 | } | |
4238 | break; /* case PR_FAULTED: */ | |
4239 | default: /* switch (why) unmatched */ | |
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 | /* | |
4247 | * Got this far without error: | |
4248 | * If retval isn't in the threads database, add it. | |
4249 | */ | |
4250 | if (PIDGET (retval) > 0 && | |
4251 | !ptid_equal (retval, inferior_ptid) && | |
4252 | !in_thread_list (retval)) | |
4253 | { | |
4254 | /* | |
4255 | * We have a new thread. | |
4256 | * We need to add it both to GDB's list and to our own. | |
4257 | * If we don't create a procinfo, resume may be unhappy | |
4258 | * later. | |
4259 | */ | |
4260 | printf_filtered (_("[New %s]\n"), target_pid_to_str (retval)); | |
4261 | add_thread (retval); | |
4262 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4263 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
4264 | ||
4265 | /* In addition, it's possible that this is the first | |
4266 | * new thread we've seen, in which case we may not | |
4267 | * have created entries for inferior_ptid yet. | |
4268 | */ | |
4269 | if (TIDGET (inferior_ptid) != 0) | |
4270 | { | |
4271 | if (!in_thread_list (inferior_ptid)) | |
4272 | add_thread (inferior_ptid); | |
4273 | if (find_procinfo (PIDGET (inferior_ptid), | |
4274 | TIDGET (inferior_ptid)) == NULL) | |
4275 | create_procinfo (PIDGET (inferior_ptid), | |
4276 | TIDGET (inferior_ptid)); | |
4277 | } | |
4278 | } | |
4279 | } | |
4280 | else /* flags do not indicate STOPPED */ | |
4281 | { | |
4282 | /* surely this can't happen... */ | |
4283 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4284 | __LINE__); | |
4285 | proc_prettyprint_flags (flags, 1); | |
4286 | error (_("procfs: ...giving up...")); | |
4287 | } | |
4288 | } | |
4289 | ||
4290 | if (status) | |
4291 | store_waitstatus (status, wstat); | |
4292 | } | |
4293 | ||
4294 | return retval; | |
4295 | } | |
4296 | ||
4297 | /* Perform a partial transfer to/from the specified object. For | |
4298 | memory transfers, fall back to the old memory xfer functions. */ | |
4299 | ||
4300 | static LONGEST | |
4301 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
4302 | const char *annex, void *readbuf, | |
4303 | const void *writebuf, ULONGEST offset, LONGEST len) | |
4304 | { | |
4305 | switch (object) | |
4306 | { | |
4307 | case TARGET_OBJECT_MEMORY: | |
4308 | if (readbuf) | |
4309 | return (*ops->deprecated_xfer_memory) (offset, readbuf, len, | |
4310 | 0/*write*/, NULL, ops); | |
4311 | if (writebuf) | |
4312 | return (*ops->deprecated_xfer_memory) (offset, writebuf, len, | |
4313 | 1/*write*/, NULL, ops); | |
4314 | return -1; | |
4315 | ||
4316 | #ifdef NEW_PROC_API | |
4317 | case TARGET_OBJECT_AUXV: | |
4318 | return procfs_xfer_auxv (ops, object, annex, readbuf, writebuf, | |
4319 | offset, len); | |
4320 | #endif | |
4321 | ||
4322 | default: | |
4323 | if (ops->beneath != NULL) | |
4324 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4325 | readbuf, writebuf, offset, len); | |
4326 | return -1; | |
4327 | } | |
4328 | } | |
4329 | ||
4330 | ||
4331 | /* Transfer LEN bytes between GDB address MYADDR and target address | |
4332 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4333 | otherwise transfer them from the target. TARGET is unused. | |
4334 | ||
4335 | The return value is 0 if an error occurred or no bytes were | |
4336 | transferred. Otherwise, it will be a positive value which | |
4337 | indicates the number of bytes transferred between gdb and the | |
4338 | target. (Note that the interface also makes provisions for | |
4339 | negative values, but this capability isn't implemented here.) */ | |
4340 | ||
4341 | static int | |
4342 | procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite, | |
4343 | struct mem_attrib *attrib, struct target_ops *target) | |
4344 | { | |
4345 | procinfo *pi; | |
4346 | int nbytes = 0; | |
4347 | ||
4348 | /* Find procinfo for main process */ | |
4349 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
4350 | if (pi->as_fd == 0 && | |
4351 | open_procinfo_files (pi, FD_AS) == 0) | |
4352 | { | |
4353 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); | |
4354 | return 0; | |
4355 | } | |
4356 | ||
4357 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) | |
4358 | { | |
4359 | if (dowrite) | |
4360 | { | |
4361 | #ifdef NEW_PROC_API | |
4362 | PROCFS_NOTE ("write memory: "); | |
4363 | #else | |
4364 | PROCFS_NOTE ("write memory: \n"); | |
4365 | #endif | |
4366 | nbytes = write (pi->as_fd, myaddr, len); | |
4367 | } | |
4368 | else | |
4369 | { | |
4370 | PROCFS_NOTE ("read memory: \n"); | |
4371 | nbytes = read (pi->as_fd, myaddr, len); | |
4372 | } | |
4373 | if (nbytes < 0) | |
4374 | { | |
4375 | nbytes = 0; | |
4376 | } | |
4377 | } | |
4378 | return nbytes; | |
4379 | } | |
4380 | ||
4381 | /* | |
4382 | * Function: invalidate_cache | |
4383 | * | |
4384 | * Called by target_resume before making child runnable. | |
4385 | * Mark cached registers and status's invalid. | |
4386 | * If there are "dirty" caches that need to be written back | |
4387 | * to the child process, do that. | |
4388 | * | |
4389 | * File descriptors are also cached. | |
4390 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4391 | * However, as they are expensive to open, we don't want to throw them | |
4392 | * away indescriminately either. As a compromise, we will keep the | |
4393 | * file descriptors for the parent process, but discard any file | |
4394 | * descriptors we may have accumulated for the threads. | |
4395 | * | |
4396 | * Return value: | |
4397 | * As this function is called by iterate_over_threads, it always | |
4398 | * returns zero (so that iterate_over_threads will keep iterating). | |
4399 | */ | |
4400 | ||
4401 | ||
4402 | static int | |
4403 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) | |
4404 | { | |
4405 | /* | |
4406 | * About to run the child; invalidate caches and do any other cleanup. | |
4407 | */ | |
4408 | ||
4409 | #if 0 | |
4410 | if (pi->gregs_dirty) | |
4411 | if (parent == NULL || | |
4412 | proc_get_current_thread (parent) != pi->tid) | |
4413 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4414 | proc_warn (pi, "target_resume, set_gregs", | |
4415 | __LINE__); | |
4416 | if (gdbarch_fp0_regnum (current_gdbarch) >= 0) | |
4417 | if (pi->fpregs_dirty) | |
4418 | if (parent == NULL || | |
4419 | proc_get_current_thread (parent) != pi->tid) | |
4420 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4421 | proc_warn (pi, "target_resume, set_fpregs", | |
4422 | __LINE__); | |
4423 | #endif | |
4424 | ||
4425 | if (parent != NULL) | |
4426 | { | |
4427 | /* The presence of a parent indicates that this is an LWP. | |
4428 | Close any file descriptors that it might have open. | |
4429 | We don't do this to the master (parent) procinfo. */ | |
4430 | ||
4431 | close_procinfo_files (pi); | |
4432 | } | |
4433 | pi->gregs_valid = 0; | |
4434 | pi->fpregs_valid = 0; | |
4435 | #if 0 | |
4436 | pi->gregs_dirty = 0; | |
4437 | pi->fpregs_dirty = 0; | |
4438 | #endif | |
4439 | pi->status_valid = 0; | |
4440 | pi->threads_valid = 0; | |
4441 | ||
4442 | return 0; | |
4443 | } | |
4444 | ||
4445 | #if 0 | |
4446 | /* | |
4447 | * Function: make_signal_thread_runnable | |
4448 | * | |
4449 | * A callback function for iterate_over_threads. | |
4450 | * Find the asynchronous signal thread, and make it runnable. | |
4451 | * See if that helps matters any. | |
4452 | */ | |
4453 | ||
4454 | static int | |
4455 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) | |
4456 | { | |
4457 | #ifdef PR_ASLWP | |
4458 | if (proc_flags (pi) & PR_ASLWP) | |
4459 | { | |
4460 | if (!proc_run_process (pi, 0, -1)) | |
4461 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4462 | return 1; | |
4463 | } | |
4464 | #endif | |
4465 | return 0; | |
4466 | } | |
4467 | #endif | |
4468 | ||
4469 | /* | |
4470 | * Function: target_resume | |
4471 | * | |
4472 | * Make the child process runnable. Normally we will then call | |
4473 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4474 | * | |
4475 | * Arguments: | |
4476 | * step: if true, then arrange for the child to stop again | |
4477 | * after executing a single instruction. | |
4478 | * signo: if zero, then cancel any pending signal. | |
4479 | * If non-zero, then arrange for the indicated signal | |
4480 | * to be delivered to the child when it runs. | |
4481 | * pid: if -1, then allow any child thread to run. | |
4482 | * if non-zero, then allow only the indicated thread to run. | |
4483 | ******* (not implemented yet) | |
4484 | */ | |
4485 | ||
4486 | static void | |
4487 | procfs_resume (ptid_t ptid, int step, enum target_signal signo) | |
4488 | { | |
4489 | procinfo *pi, *thread; | |
4490 | int native_signo; | |
4491 | ||
4492 | /* 2.1: | |
4493 | prrun.prflags |= PRSVADDR; | |
4494 | prrun.pr_vaddr = $PC; set resume address | |
4495 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4496 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4497 | prrun.prflags |= PRCFAULT; clear current fault. | |
4498 | ||
4499 | PRSTRACE and PRSFAULT can be done by other means | |
4500 | (proc_trace_signals, proc_trace_faults) | |
4501 | PRSVADDR is unnecessary. | |
4502 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4503 | This basically leaves PRSTEP and PRCSIG. | |
4504 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4505 | So basically PR_STEP is the sole argument that must be passed | |
4506 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4507 | ||
4508 | /* Find procinfo for main process */ | |
4509 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
4510 | ||
4511 | /* First cut: ignore pid argument */ | |
4512 | errno = 0; | |
4513 | ||
4514 | /* Convert signal to host numbering. */ | |
4515 | if (signo == 0 || | |
4516 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) | |
4517 | native_signo = 0; | |
4518 | else | |
4519 | native_signo = target_signal_to_host (signo); | |
4520 | ||
4521 | pi->ignore_next_sigstop = 0; | |
4522 | ||
4523 | /* Running the process voids all cached registers and status. */ | |
4524 | /* Void the threads' caches first */ | |
4525 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4526 | /* Void the process procinfo's caches. */ | |
4527 | invalidate_cache (NULL, pi, NULL); | |
4528 | ||
4529 | if (PIDGET (ptid) != -1) | |
4530 | { | |
4531 | /* Resume a specific thread, presumably suppressing the others. */ | |
4532 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); | |
4533 | if (thread != NULL) | |
4534 | { | |
4535 | if (thread->tid != 0) | |
4536 | { | |
4537 | /* We're to resume a specific thread, and not the others. | |
4538 | * Set the child process's PR_ASYNC flag. | |
4539 | */ | |
4540 | #ifdef PR_ASYNC | |
4541 | if (!proc_set_async (pi)) | |
4542 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4543 | #endif | |
4544 | #if 0 | |
4545 | proc_iterate_over_threads (pi, | |
4546 | make_signal_thread_runnable, | |
4547 | NULL); | |
4548 | #endif | |
4549 | pi = thread; /* substitute the thread's procinfo for run */ | |
4550 | } | |
4551 | } | |
4552 | } | |
4553 | ||
4554 | if (!proc_run_process (pi, step, native_signo)) | |
4555 | { | |
4556 | if (errno == EBUSY) | |
4557 | warning (_("resume: target already running. Pretend to resume, and hope for the best!")); | |
4558 | else | |
4559 | proc_error (pi, "target_resume", __LINE__); | |
4560 | } | |
4561 | } | |
4562 | ||
4563 | /* | |
4564 | * Function: register_gdb_signals | |
4565 | * | |
4566 | * Traverse the list of signals that GDB knows about | |
4567 | * (see "handle" command), and arrange for the target | |
4568 | * to be stopped or not, according to these settings. | |
4569 | * | |
4570 | * Returns non-zero for success, zero for failure. | |
4571 | */ | |
4572 | ||
4573 | static int | |
4574 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) | |
4575 | { | |
4576 | int signo; | |
4577 | ||
4578 | for (signo = 0; signo < NSIG; signo ++) | |
4579 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4580 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4581 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4582 | prdelset (signals, signo); | |
4583 | else | |
4584 | praddset (signals, signo); | |
4585 | ||
4586 | return proc_set_traced_signals (pi, signals); | |
4587 | } | |
4588 | ||
4589 | /* | |
4590 | * Function: target_notice_signals | |
4591 | * | |
4592 | * Set up to trace signals in the child process. | |
4593 | */ | |
4594 | ||
4595 | static void | |
4596 | procfs_notice_signals (ptid_t ptid) | |
4597 | { | |
4598 | gdb_sigset_t signals; | |
4599 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); | |
4600 | ||
4601 | if (proc_get_traced_signals (pi, &signals) && | |
4602 | register_gdb_signals (pi, &signals)) | |
4603 | return; | |
4604 | else | |
4605 | proc_error (pi, "notice_signals", __LINE__); | |
4606 | } | |
4607 | ||
4608 | /* | |
4609 | * Function: target_files_info | |
4610 | * | |
4611 | * Print status information about the child process. | |
4612 | */ | |
4613 | ||
4614 | static void | |
4615 | procfs_files_info (struct target_ops *ignore) | |
4616 | { | |
4617 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), | |
4618 | attach_flag? "attached": "child", | |
4619 | target_pid_to_str (inferior_ptid)); | |
4620 | } | |
4621 | ||
4622 | /* | |
4623 | * Function: target_open | |
4624 | * | |
4625 | * A dummy: you don't open procfs. | |
4626 | */ | |
4627 | ||
4628 | static void | |
4629 | procfs_open (char *args, int from_tty) | |
4630 | { | |
4631 | error (_("Use the \"run\" command to start a Unix child process.")); | |
4632 | } | |
4633 | ||
4634 | /* | |
4635 | * Function: target_can_run | |
4636 | * | |
4637 | * This tells GDB that this target vector can be invoked | |
4638 | * for "run" or "attach". | |
4639 | */ | |
4640 | ||
4641 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to | |
4642 | be a runnable target. Used by targets | |
4643 | that can sit atop procfs, such as solaris | |
4644 | thread support. */ | |
4645 | ||
4646 | ||
4647 | static int | |
4648 | procfs_can_run (void) | |
4649 | { | |
4650 | /* This variable is controlled by modules that sit atop procfs that | |
4651 | may layer their own process structure atop that provided here. | |
4652 | sol-thread.c does this because of the Solaris two-level thread | |
4653 | model. */ | |
4654 | ||
4655 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
4656 | ||
4657 | return !procfs_suppress_run; | |
4658 | } | |
4659 | ||
4660 | /* | |
4661 | * Function: target_stop | |
4662 | * | |
4663 | * Stop the child process asynchronously, as when the | |
4664 | * gdb user types control-c or presses a "stop" button. | |
4665 | * | |
4666 | * Works by sending kill(SIGINT) to the child's process group. | |
4667 | */ | |
4668 | ||
4669 | static void | |
4670 | procfs_stop (void) | |
4671 | { | |
4672 | kill (-inferior_process_group, SIGINT); | |
4673 | } | |
4674 | ||
4675 | /* | |
4676 | * Function: unconditionally_kill_inferior | |
4677 | * | |
4678 | * Make it die. Wait for it to die. Clean up after it. | |
4679 | * Note: this should only be applied to the real process, | |
4680 | * not to an LWP, because of the check for parent-process. | |
4681 | * If we need this to work for an LWP, it needs some more logic. | |
4682 | */ | |
4683 | ||
4684 | static void | |
4685 | unconditionally_kill_inferior (procinfo *pi) | |
4686 | { | |
4687 | int parent_pid; | |
4688 | ||
4689 | parent_pid = proc_parent_pid (pi); | |
4690 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4691 | /* FIXME: use access functions */ | |
4692 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4693 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4694 | file for the inferior. */ | |
4695 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4696 | { | |
4697 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4698 | } | |
4699 | #endif | |
4700 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4701 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4702 | to kill the inferior, otherwise it might remain stopped with a | |
4703 | pending SIGKILL. | |
4704 | We do not check the result of the PIOCSSIG, the inferior might have | |
4705 | died already. */ | |
4706 | { | |
4707 | gdb_siginfo_t newsiginfo; | |
4708 | ||
4709 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); | |
4710 | newsiginfo.si_signo = SIGKILL; | |
4711 | newsiginfo.si_code = 0; | |
4712 | newsiginfo.si_errno = 0; | |
4713 | newsiginfo.si_pid = getpid (); | |
4714 | newsiginfo.si_uid = getuid (); | |
4715 | /* FIXME: use proc_set_current_signal */ | |
4716 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4717 | } | |
4718 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4719 | if (!proc_kill (pi, SIGKILL)) | |
4720 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); | |
4721 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4722 | destroy_procinfo (pi); | |
4723 | ||
4724 | /* If pi is GDB's child, wait for it to die. */ | |
4725 | if (parent_pid == getpid ()) | |
4726 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4727 | Should we check the returned event? */ | |
4728 | { | |
4729 | #if 0 | |
4730 | int status, ret; | |
4731 | ||
4732 | ret = waitpid (pi->pid, &status, 0); | |
4733 | #else | |
4734 | wait (NULL); | |
4735 | #endif | |
4736 | } | |
4737 | } | |
4738 | ||
4739 | /* | |
4740 | * Function: target_kill_inferior | |
4741 | * | |
4742 | * We're done debugging it, and we want it to go away. | |
4743 | * Then we want GDB to forget all about it. | |
4744 | */ | |
4745 | ||
4746 | static void | |
4747 | procfs_kill_inferior (void) | |
4748 | { | |
4749 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ | |
4750 | { | |
4751 | /* Find procinfo for main process */ | |
4752 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); | |
4753 | ||
4754 | if (pi) | |
4755 | unconditionally_kill_inferior (pi); | |
4756 | target_mourn_inferior (); | |
4757 | } | |
4758 | } | |
4759 | ||
4760 | /* | |
4761 | * Function: target_mourn_inferior | |
4762 | * | |
4763 | * Forget we ever debugged this thing! | |
4764 | */ | |
4765 | ||
4766 | static void | |
4767 | procfs_mourn_inferior (void) | |
4768 | { | |
4769 | procinfo *pi; | |
4770 | ||
4771 | if (!ptid_equal (inferior_ptid, null_ptid)) | |
4772 | { | |
4773 | /* Find procinfo for main process */ | |
4774 | pi = find_procinfo (PIDGET (inferior_ptid), 0); | |
4775 | if (pi) | |
4776 | destroy_procinfo (pi); | |
4777 | } | |
4778 | unpush_target (&procfs_ops); | |
4779 | ||
4780 | if (dbx_link_bpt != NULL) | |
4781 | { | |
4782 | deprecated_remove_raw_breakpoint (dbx_link_bpt); | |
4783 | dbx_link_bpt_addr = 0; | |
4784 | dbx_link_bpt = NULL; | |
4785 | } | |
4786 | ||
4787 | generic_mourn_inferior (); | |
4788 | } | |
4789 | ||
4790 | /* | |
4791 | * Function: init_inferior | |
4792 | * | |
4793 | * When GDB forks to create a runnable inferior process, | |
4794 | * this function is called on the parent side of the fork. | |
4795 | * It's job is to do whatever is necessary to make the child | |
4796 | * ready to be debugged, and then wait for the child to synchronize. | |
4797 | */ | |
4798 | ||
4799 | static void | |
4800 | procfs_init_inferior (int pid) | |
4801 | { | |
4802 | procinfo *pi; | |
4803 | gdb_sigset_t signals; | |
4804 | int fail; | |
4805 | ||
4806 | /* This routine called on the parent side (GDB side) | |
4807 | after GDB forks the inferior. */ | |
4808 | ||
4809 | push_target (&procfs_ops); | |
4810 | ||
4811 | if ((pi = create_procinfo (pid, 0)) == NULL) | |
4812 | perror ("procfs: out of memory in 'init_inferior'"); | |
4813 | ||
4814 | if (!open_procinfo_files (pi, FD_CTL)) | |
4815 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4816 | ||
4817 | /* | |
4818 | xmalloc // done | |
4819 | open_procinfo_files // done | |
4820 | link list // done | |
4821 | prfillset (trace) | |
4822 | procfs_notice_signals | |
4823 | prfillset (fault) | |
4824 | prdelset (FLTPAGE) | |
4825 | PIOCWSTOP | |
4826 | PIOCSFAULT | |
4827 | */ | |
4828 | ||
4829 | /* If not stopped yet, wait for it to stop. */ | |
4830 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4831 | !(proc_wait_for_stop (pi))) | |
4832 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4833 | ||
4834 | /* Save some of the /proc state to be restored if we detach. */ | |
4835 | /* FIXME: Why? In case another debugger was debugging it? | |
4836 | We're it's parent, for Ghu's sake! */ | |
4837 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4838 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4839 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4840 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4841 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4842 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
4843 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) | |
4844 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); | |
4845 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) | |
4846 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); | |
4847 | ||
4848 | /* Register to trace selected signals in the child. */ | |
4849 | prfillset (&signals); | |
4850 | if (!register_gdb_signals (pi, &signals)) | |
4851 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4852 | ||
4853 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4854 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4855 | ||
4856 | /* FIXME: logically, we should really be turning OFF run-on-last-close, | |
4857 | and possibly even turning ON kill-on-last-close at this point. But | |
4858 | I can't make that change without careful testing which I don't have | |
4859 | time to do right now... */ | |
4860 | /* Turn on run-on-last-close flag so that the child | |
4861 | will die if GDB goes away for some reason. */ | |
4862 | if (!proc_set_run_on_last_close (pi)) | |
4863 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4864 | ||
4865 | /* The 'process ID' we return to GDB is composed of | |
4866 | the actual process ID plus the lwp ID. */ | |
4867 | inferior_ptid = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
4868 | ||
4869 | /* Typically two, one trap to exec the shell, one to exec the | |
4870 | program being debugged. Defined by "inferior.h". */ | |
4871 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4872 | ||
4873 | #ifdef SYS_syssgi | |
4874 | /* On mips-irix, we need to stop the inferior early enough during | |
4875 | the startup phase in order to be able to load the shared library | |
4876 | symbols and insert the breakpoints that are located in these shared | |
4877 | libraries. Stopping at the program entry point is not good enough | |
4878 | because the -init code is executed before the execution reaches | |
4879 | that point. | |
4880 | ||
4881 | So what we need to do is to insert a breakpoint in the runtime | |
4882 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4883 | called by rld once all shared libraries have been mapped, but before | |
4884 | the -init code is executed. Unfortuantely, this is not straightforward, | |
4885 | as rld is not part of the executable we are running, and thus we need | |
4886 | the inferior to run until rld itself has been mapped in memory. | |
4887 | ||
4888 | For this, we trace all syssgi() syscall exit events. Each time | |
4889 | we detect such an event, we iterate over each text memory maps, | |
4890 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4891 | When found, we know that rld has been mapped, and that we can insert | |
4892 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4893 | has been inserted, the syssgi() notifications are no longer necessary, | |
4894 | so they should be canceled. */ | |
4895 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
4896 | #endif | |
4897 | } | |
4898 | ||
4899 | /* | |
4900 | * Function: set_exec_trap | |
4901 | * | |
4902 | * When GDB forks to create a new process, this function is called | |
4903 | * on the child side of the fork before GDB exec's the user program. | |
4904 | * Its job is to make the child minimally debuggable, so that the | |
4905 | * parent GDB process can connect to the child and take over. | |
4906 | * This function should do only the minimum to make that possible, | |
4907 | * and to synchronize with the parent process. The parent process | |
4908 | * should take care of the details. | |
4909 | */ | |
4910 | ||
4911 | static void | |
4912 | procfs_set_exec_trap (void) | |
4913 | { | |
4914 | /* This routine called on the child side (inferior side) | |
4915 | after GDB forks the inferior. It must use only local variables, | |
4916 | because it may be sharing data space with its parent. */ | |
4917 | ||
4918 | procinfo *pi; | |
4919 | sysset_t *exitset; | |
4920 | ||
4921 | if ((pi = create_procinfo (getpid (), 0)) == NULL) | |
4922 | perror_with_name (_("procfs: create_procinfo failed in child.")); | |
4923 | ||
4924 | if (open_procinfo_files (pi, FD_CTL) == 0) | |
4925 | { | |
4926 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4927 | gdb_flush (gdb_stderr); | |
4928 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4929 | _exit (127); | |
4930 | } | |
4931 | ||
4932 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
4933 | /* OSF method for tracing exec syscalls. Quoting: | |
4934 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4935 | exits from exec system calls because of the user level loader. */ | |
4936 | /* FIXME: make nice and maybe move into an access function. */ | |
4937 | { | |
4938 | int prfs_flags; | |
4939 | ||
4940 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
4941 | { | |
4942 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4943 | gdb_flush (gdb_stderr); | |
4944 | _exit (127); | |
4945 | } | |
4946 | prfs_flags |= PRFS_STOPEXEC; | |
4947 | ||
4948 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
4949 | { | |
4950 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4951 | gdb_flush (gdb_stderr); | |
4952 | _exit (127); | |
4953 | } | |
4954 | } | |
4955 | #else /* not PRFS_STOPEXEC */ | |
4956 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4957 | /* GW: Rationale... | |
4958 | Not all systems with /proc have all the exec* syscalls with the same | |
4959 | names. On the SGI, for example, there is no SYS_exec, but there | |
4960 | *is* a SYS_execv. So, we try to account for that. */ | |
4961 | ||
4962 | exitset = sysset_t_alloc (pi); | |
4963 | gdb_premptysysset (exitset); | |
4964 | #ifdef SYS_exec | |
4965 | gdb_praddsysset (exitset, SYS_exec); | |
4966 | #endif | |
4967 | #ifdef SYS_execve | |
4968 | gdb_praddsysset (exitset, SYS_execve); | |
4969 | #endif | |
4970 | #ifdef SYS_execv | |
4971 | gdb_praddsysset (exitset, SYS_execv); | |
4972 | #endif | |
4973 | #ifdef DYNAMIC_SYSCALLS | |
4974 | { | |
4975 | int callnum = find_syscall (pi, "execve"); | |
4976 | ||
4977 | if (callnum >= 0) | |
4978 | gdb_praddsysset (exitset, callnum); | |
4979 | ||
4980 | callnum = find_syscall (pi, "ra_execve"); | |
4981 | if (callnum >= 0) | |
4982 | gdb_praddsysset (exitset, callnum); | |
4983 | } | |
4984 | #endif /* DYNAMIC_SYSCALLS */ | |
4985 | ||
4986 | if (!proc_set_traced_sysexit (pi, exitset)) | |
4987 | { | |
4988 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); | |
4989 | gdb_flush (gdb_stderr); | |
4990 | _exit (127); | |
4991 | } | |
4992 | #endif /* PRFS_STOPEXEC */ | |
4993 | ||
4994 | /* FIXME: should this be done in the parent instead? */ | |
4995 | /* Turn off inherit on fork flag so that all grand-children | |
4996 | of gdb start with tracing flags cleared. */ | |
4997 | if (!proc_unset_inherit_on_fork (pi)) | |
4998 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4999 | ||
5000 | /* Turn off run on last close flag, so that the child process | |
5001 | cannot run away just because we close our handle on it. | |
5002 | We want it to wait for the parent to attach. */ | |
5003 | if (!proc_unset_run_on_last_close (pi)) | |
5004 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
5005 | ||
5006 | /* FIXME: No need to destroy the procinfo -- | |
5007 | we have our own address space, and we're about to do an exec! */ | |
5008 | /*destroy_procinfo (pi);*/ | |
5009 | } | |
5010 | ||
5011 | /* | |
5012 | * Function: create_inferior | |
5013 | * | |
5014 | * This function is called BEFORE gdb forks the inferior process. | |
5015 | * Its only real responsibility is to set things up for the fork, | |
5016 | * and tell GDB which two functions to call after the fork (one | |
5017 | * for the parent, and one for the child). | |
5018 | * | |
5019 | * This function does a complicated search for a unix shell program, | |
5020 | * which it then uses to parse arguments and environment variables | |
5021 | * to be sent to the child. I wonder whether this code could not | |
5022 | * be abstracted out and shared with other unix targets such as | |
5023 | * infptrace? | |
5024 | */ | |
5025 | ||
5026 | static void | |
5027 | procfs_create_inferior (char *exec_file, char *allargs, char **env, | |
5028 | int from_tty) | |
5029 | { | |
5030 | char *shell_file = getenv ("SHELL"); | |
5031 | char *tryname; | |
5032 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
5033 | { | |
5034 | ||
5035 | /* We will be looking down the PATH to find shell_file. If we | |
5036 | just do this the normal way (via execlp, which operates by | |
5037 | attempting an exec for each element of the PATH until it | |
5038 | finds one which succeeds), then there will be an exec for | |
5039 | each failed attempt, each of which will cause a PR_SYSEXIT | |
5040 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
5041 | for these failed execs with the ones for successful execs | |
5042 | (whether the exec has succeeded is stored at that time in the | |
5043 | carry bit or some such architecture-specific and | |
5044 | non-ABI-specified place). | |
5045 | ||
5046 | So I can't think of anything better than to search the PATH | |
5047 | now. This has several disadvantages: (1) There is a race | |
5048 | condition; if we find a file now and it is deleted before we | |
5049 | exec it, we lose, even if the deletion leaves a valid file | |
5050 | further down in the PATH, (2) there is no way to know exactly | |
5051 | what an executable (in the sense of "capable of being | |
5052 | exec'd") file is. Using access() loses because it may lose | |
5053 | if the caller is the superuser; failing to use it loses if | |
5054 | there are ACLs or some such. */ | |
5055 | ||
5056 | char *p; | |
5057 | char *p1; | |
5058 | /* FIXME-maybe: might want "set path" command so user can change what | |
5059 | path is used from within GDB. */ | |
5060 | char *path = getenv ("PATH"); | |
5061 | int len; | |
5062 | struct stat statbuf; | |
5063 | ||
5064 | if (path == NULL) | |
5065 | path = "/bin:/usr/bin"; | |
5066 | ||
5067 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
5068 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) | |
5069 | { | |
5070 | p1 = strchr (p, ':'); | |
5071 | if (p1 != NULL) | |
5072 | len = p1 - p; | |
5073 | else | |
5074 | len = strlen (p); | |
5075 | strncpy (tryname, p, len); | |
5076 | tryname[len] = '\0'; | |
5077 | strcat (tryname, "/"); | |
5078 | strcat (tryname, shell_file); | |
5079 | if (access (tryname, X_OK) < 0) | |
5080 | continue; | |
5081 | if (stat (tryname, &statbuf) < 0) | |
5082 | continue; | |
5083 | if (!S_ISREG (statbuf.st_mode)) | |
5084 | /* We certainly need to reject directories. I'm not quite | |
5085 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
5086 | that people want to exec() these things. */ | |
5087 | continue; | |
5088 | break; | |
5089 | } | |
5090 | if (p == NULL) | |
5091 | /* Not found. This must be an error rather than merely passing | |
5092 | the file to execlp(), because execlp() would try all the | |
5093 | exec()s, causing GDB to get confused. */ | |
5094 | error (_("procfs:%d -- Can't find shell %s in PATH"), | |
5095 | __LINE__, shell_file); | |
5096 | ||
5097 | shell_file = tryname; | |
5098 | } | |
5099 | ||
5100 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, | |
5101 | procfs_init_inferior, NULL, shell_file); | |
5102 | ||
5103 | #ifdef SYS_syssgi | |
5104 | /* Make sure to cancel the syssgi() syscall-exit notifications. | |
5105 | They should normally have been removed by now, but they may still | |
5106 | be activated if the inferior doesn't use shared libraries, or if | |
5107 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
5108 | See procfs_init_inferior() for more details. */ | |
5109 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), | |
5110 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
5111 | #endif | |
5112 | } | |
5113 | ||
5114 | /* | |
5115 | * Function: notice_thread | |
5116 | * | |
5117 | * Callback for find_new_threads. | |
5118 | * Calls "add_thread". | |
5119 | */ | |
5120 | ||
5121 | static int | |
5122 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) | |
5123 | { | |
5124 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); | |
5125 | ||
5126 | if (!in_thread_list (gdb_threadid)) | |
5127 | add_thread (gdb_threadid); | |
5128 | ||
5129 | return 0; | |
5130 | } | |
5131 | ||
5132 | /* | |
5133 | * Function: target_find_new_threads | |
5134 | * | |
5135 | * Query all the threads that the target knows about, | |
5136 | * and give them back to GDB to add to its list. | |
5137 | */ | |
5138 | ||
5139 | void | |
5140 | procfs_find_new_threads (void) | |
5141 | { | |
5142 | procinfo *pi; | |
5143 | ||
5144 | /* Find procinfo for main process */ | |
5145 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5146 | proc_update_threads (pi); | |
5147 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
5148 | } | |
5149 | ||
5150 | /* | |
5151 | * Function: target_thread_alive | |
5152 | * | |
5153 | * Return true if the thread is still 'alive'. | |
5154 | * | |
5155 | * This guy doesn't really seem to be doing his job. | |
5156 | * Got to investigate how to tell when a thread is really gone. | |
5157 | */ | |
5158 | ||
5159 | static int | |
5160 | procfs_thread_alive (ptid_t ptid) | |
5161 | { | |
5162 | int proc, thread; | |
5163 | procinfo *pi; | |
5164 | ||
5165 | proc = PIDGET (ptid); | |
5166 | thread = TIDGET (ptid); | |
5167 | /* If I don't know it, it ain't alive! */ | |
5168 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5169 | return 0; | |
5170 | ||
5171 | /* If I can't get its status, it ain't alive! | |
5172 | What's more, I need to forget about it! */ | |
5173 | if (!proc_get_status (pi)) | |
5174 | { | |
5175 | destroy_procinfo (pi); | |
5176 | return 0; | |
5177 | } | |
5178 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5179 | return 1; | |
5180 | } | |
5181 | ||
5182 | /* Convert PTID to a string. Returns the string in a static buffer. */ | |
5183 | ||
5184 | char * | |
5185 | procfs_pid_to_str (ptid_t ptid) | |
5186 | { | |
5187 | static char buf[80]; | |
5188 | ||
5189 | if (TIDGET (ptid) == 0) | |
5190 | sprintf (buf, "process %d", PIDGET (ptid)); | |
5191 | else | |
5192 | sprintf (buf, "LWP %ld", TIDGET (ptid)); | |
5193 | ||
5194 | return buf; | |
5195 | } | |
5196 | ||
5197 | /* | |
5198 | * Function: procfs_set_watchpoint | |
5199 | * Insert a watchpoint | |
5200 | */ | |
5201 | ||
5202 | int | |
5203 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, | |
5204 | int after) | |
5205 | { | |
5206 | #ifndef UNIXWARE | |
5207 | #ifndef AIX5 | |
5208 | int pflags = 0; | |
5209 | procinfo *pi; | |
5210 | ||
5211 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? | |
5212 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); | |
5213 | ||
5214 | /* Translate from GDB's flags to /proc's */ | |
5215 | if (len > 0) /* len == 0 means delete watchpoint */ | |
5216 | { | |
5217 | switch (rwflag) { /* FIXME: need an enum! */ | |
5218 | case hw_write: /* default watchpoint (write) */ | |
5219 | pflags = WRITE_WATCHFLAG; | |
5220 | break; | |
5221 | case hw_read: /* read watchpoint */ | |
5222 | pflags = READ_WATCHFLAG; | |
5223 | break; | |
5224 | case hw_access: /* access watchpoint */ | |
5225 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5226 | break; | |
5227 | case hw_execute: /* execution HW breakpoint */ | |
5228 | pflags = EXEC_WATCHFLAG; | |
5229 | break; | |
5230 | default: /* Something weird. Return error. */ | |
5231 | return -1; | |
5232 | } | |
5233 | if (after) /* Stop after r/w access is completed. */ | |
5234 | pflags |= AFTER_WATCHFLAG; | |
5235 | } | |
5236 | ||
5237 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5238 | { | |
5239 | if (errno == E2BIG) /* Typical error for no resources */ | |
5240 | return -1; /* fail */ | |
5241 | /* GDB may try to remove the same watchpoint twice. | |
5242 | If a remove request returns no match, don't error. */ | |
5243 | if (errno == ESRCH && len == 0) | |
5244 | return 0; /* ignore */ | |
5245 | proc_error (pi, "set_watchpoint", __LINE__); | |
5246 | } | |
5247 | #endif /* AIX5 */ | |
5248 | #endif /* UNIXWARE */ | |
5249 | return 0; | |
5250 | } | |
5251 | ||
5252 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE | |
5253 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5254 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5255 | far. | |
5256 | ||
5257 | Note: procfs_can_use_hw_breakpoint() is not yet used by all | |
5258 | procfs.c targets due to the fact that some of them still define | |
5259 | TARGET_CAN_USE_HARDWARE_WATCHPOINT. */ | |
5260 | ||
5261 | static int | |
5262 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5263 | { | |
5264 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS | |
5265 | return 0; | |
5266 | #else | |
5267 | /* Due to the way that proc_set_watchpoint() is implemented, host | |
5268 | and target pointers must be of the same size. If they are not, | |
5269 | we can't use hardware watchpoints. This limitation is due to the | |
5270 | fact that proc_set_watchpoint() calls | |
5271 | procfs_address_to_host_pointer(); a close inspection of | |
5272 | procfs_address_to_host_pointer will reveal that an internal error | |
5273 | will be generated when the host and target pointer sizes are | |
5274 | different. */ | |
5275 | if (sizeof (void *) != TYPE_LENGTH (builtin_type_void_data_ptr)) | |
5276 | return 0; | |
5277 | ||
5278 | /* Other tests here??? */ | |
5279 | ||
5280 | return 1; | |
5281 | #endif | |
5282 | } | |
5283 | ||
5284 | /* | |
5285 | * Function: stopped_by_watchpoint | |
5286 | * | |
5287 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5288 | * else returns zero. | |
5289 | */ | |
5290 | ||
5291 | int | |
5292 | procfs_stopped_by_watchpoint (ptid_t ptid) | |
5293 | { | |
5294 | procinfo *pi; | |
5295 | ||
5296 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? | |
5297 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); | |
5298 | ||
5299 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5300 | return 0; | |
5301 | ||
5302 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
5303 | { | |
5304 | if (proc_why (pi) == PR_FAULTED) | |
5305 | { | |
5306 | #ifdef FLTWATCH | |
5307 | if (proc_what (pi) == FLTWATCH) | |
5308 | return 1; | |
5309 | #endif | |
5310 | #ifdef FLTKWATCH | |
5311 | if (proc_what (pi) == FLTKWATCH) | |
5312 | return 1; | |
5313 | #endif | |
5314 | } | |
5315 | } | |
5316 | return 0; | |
5317 | } | |
5318 | ||
5319 | #ifdef TM_I386SOL2_H | |
5320 | /* | |
5321 | * Function: procfs_find_LDT_entry | |
5322 | * | |
5323 | * Input: | |
5324 | * ptid_t ptid; // The GDB-style pid-plus-LWP. | |
5325 | * | |
5326 | * Return: | |
5327 | * pointer to the corresponding LDT entry. | |
5328 | */ | |
5329 | ||
5330 | struct ssd * | |
5331 | procfs_find_LDT_entry (ptid_t ptid) | |
5332 | { | |
5333 | gdb_gregset_t *gregs; | |
5334 | int key; | |
5335 | procinfo *pi; | |
5336 | ||
5337 | /* Find procinfo for the lwp. */ | |
5338 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) | |
5339 | { | |
5340 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%d."), | |
5341 | PIDGET (ptid), TIDGET (ptid)); | |
5342 | return NULL; | |
5343 | } | |
5344 | /* get its general registers. */ | |
5345 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
5346 | { | |
5347 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%d."), | |
5348 | PIDGET (ptid), TIDGET (ptid)); | |
5349 | return NULL; | |
5350 | } | |
5351 | /* Now extract the GS register's lower 16 bits. */ | |
5352 | key = (*gregs)[GS] & 0xffff; | |
5353 | ||
5354 | /* Find the matching entry and return it. */ | |
5355 | return proc_get_LDT_entry (pi, key); | |
5356 | } | |
5357 | #endif /* TM_I386SOL2_H */ | |
5358 | ||
5359 | /* | |
5360 | * Memory Mappings Functions: | |
5361 | */ | |
5362 | ||
5363 | /* | |
5364 | * Function: iterate_over_mappings | |
5365 | * | |
5366 | * Call a callback function once for each mapping, passing it the mapping, | |
5367 | * an optional secondary callback function, and some optional opaque data. | |
5368 | * Quit and return the first non-zero value returned from the callback. | |
5369 | * | |
5370 | * Arguments: | |
5371 | * pi -- procinfo struct for the process to be mapped. | |
5372 | * func -- callback function to be called by this iterator. | |
5373 | * data -- optional opaque data to be passed to the callback function. | |
5374 | * child_func -- optional secondary function pointer to be passed | |
5375 | * to the child function. | |
5376 | * | |
5377 | * Return: First non-zero return value from the callback function, | |
5378 | * or zero. | |
5379 | */ | |
5380 | ||
5381 | static int | |
5382 | iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data, | |
5383 | int (*func) (struct prmap *map, | |
5384 | int (*child_func) (), | |
5385 | void *data)) | |
5386 | { | |
5387 | char pathname[MAX_PROC_NAME_SIZE]; | |
5388 | struct prmap *prmaps; | |
5389 | struct prmap *prmap; | |
5390 | int funcstat; | |
5391 | int map_fd; | |
5392 | int nmap; | |
5393 | #ifdef NEW_PROC_API | |
5394 | struct stat sbuf; | |
5395 | #endif | |
5396 | ||
5397 | /* Get the number of mappings, allocate space, | |
5398 | and read the mappings into prmaps. */ | |
5399 | #ifdef NEW_PROC_API | |
5400 | /* Open map fd. */ | |
5401 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5402 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5403 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5404 | ||
5405 | /* Make sure it gets closed again. */ | |
5406 | make_cleanup_close (map_fd); | |
5407 | ||
5408 | /* Use stat to determine the file size, and compute | |
5409 | the number of prmap_t objects it contains. */ | |
5410 | if (fstat (map_fd, &sbuf) != 0) | |
5411 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5412 | ||
5413 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5414 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5415 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5416 | != (nmap * sizeof (*prmaps))) | |
5417 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5418 | #else | |
5419 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5420 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5421 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5422 | ||
5423 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5424 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5425 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5426 | #endif | |
5427 | ||
5428 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5429 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5430 | return funcstat; | |
5431 | ||
5432 | return 0; | |
5433 | } | |
5434 | ||
5435 | /* | |
5436 | * Function: solib_mappings_callback | |
5437 | * | |
5438 | * Calls the supplied callback function once for each mapped address | |
5439 | * space in the process. The callback function receives an open | |
5440 | * file descriptor for the file corresponding to that mapped | |
5441 | * address space (if there is one), and the base address of the | |
5442 | * mapped space. Quit when the callback function returns a | |
5443 | * nonzero value, or at teh end of the mappings. | |
5444 | * | |
5445 | * Returns: the first non-zero return value of the callback function, | |
5446 | * or zero. | |
5447 | */ | |
5448 | ||
5449 | int solib_mappings_callback (struct prmap *map, | |
5450 | int (*func) (int, CORE_ADDR), | |
5451 | void *data) | |
5452 | { | |
5453 | procinfo *pi = data; | |
5454 | int fd; | |
5455 | ||
5456 | #ifdef NEW_PROC_API | |
5457 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
5458 | ||
5459 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
5460 | return -1; /* sanity */ | |
5461 | ||
5462 | if (map->pr_mapname[0] == 0) | |
5463 | { | |
5464 | fd = -1; /* no map file */ | |
5465 | } | |
5466 | else | |
5467 | { | |
5468 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
5469 | /* Note: caller's responsibility to close this fd! */ | |
5470 | fd = open_with_retry (name, O_RDONLY); | |
5471 | /* Note: we don't test the above call for failure; | |
5472 | we just pass the FD on as given. Sometimes there is | |
5473 | no file, so the open may return failure, but that's | |
5474 | not a problem. */ | |
5475 | } | |
5476 | #else | |
5477 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
5478 | /* Note: we don't test the above call for failure; | |
5479 | we just pass the FD on as given. Sometimes there is | |
5480 | no file, so the ioctl may return failure, but that's | |
5481 | not a problem. */ | |
5482 | #endif | |
5483 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
5484 | } | |
5485 | ||
5486 | /* | |
5487 | * Function: proc_iterate_over_mappings | |
5488 | * | |
5489 | * Uses the unified "iterate_over_mappings" function | |
5490 | * to implement the exported interface to solib-svr4.c. | |
5491 | * | |
5492 | * Given a pointer to a function, call that function once for every | |
5493 | * mapped address space in the process. The callback function | |
5494 | * receives an open file descriptor for the file corresponding to | |
5495 | * that mapped address space (if there is one), and the base address | |
5496 | * of the mapped space. Quit when the callback function returns a | |
5497 | * nonzero value, or at teh end of the mappings. | |
5498 | * | |
5499 | * Returns: the first non-zero return value of the callback function, | |
5500 | * or zero. | |
5501 | */ | |
5502 | ||
5503 | int | |
5504 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) | |
5505 | { | |
5506 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5507 | ||
5508 | return iterate_over_mappings (pi, func, pi, solib_mappings_callback); | |
5509 | } | |
5510 | ||
5511 | /* | |
5512 | * Function: find_memory_regions_callback | |
5513 | * | |
5514 | * Implements the to_find_memory_regions method. | |
5515 | * Calls an external function for each memory region. | |
5516 | * External function will have the signiture: | |
5517 | * | |
5518 | * int callback (CORE_ADDR vaddr, | |
5519 | * unsigned long size, | |
5520 | * int read, int write, int execute, | |
5521 | * void *data); | |
5522 | * | |
5523 | * Returns the integer value returned by the callback. | |
5524 | */ | |
5525 | ||
5526 | static int | |
5527 | find_memory_regions_callback (struct prmap *map, | |
5528 | int (*func) (CORE_ADDR, | |
5529 | unsigned long, | |
5530 | int, int, int, | |
5531 | void *), | |
5532 | void *data) | |
5533 | { | |
5534 | return (*func) ((CORE_ADDR) map->pr_vaddr, | |
5535 | map->pr_size, | |
5536 | (map->pr_mflags & MA_READ) != 0, | |
5537 | (map->pr_mflags & MA_WRITE) != 0, | |
5538 | (map->pr_mflags & MA_EXEC) != 0, | |
5539 | data); | |
5540 | } | |
5541 | ||
5542 | /* | |
5543 | * Function: proc_find_memory_regions | |
5544 | * | |
5545 | * External interface. Calls a callback function once for each | |
5546 | * mapped memory region in the child process, passing as arguments | |
5547 | * CORE_ADDR virtual_address, | |
5548 | * unsigned long size, | |
5549 | * int read, TRUE if region is readable by the child | |
5550 | * int write, TRUE if region is writable by the child | |
5551 | * int execute TRUE if region is executable by the child. | |
5552 | * | |
5553 | * Stops iterating and returns the first non-zero value | |
5554 | * returned by the callback. | |
5555 | */ | |
5556 | ||
5557 | static int | |
5558 | proc_find_memory_regions (int (*func) (CORE_ADDR, | |
5559 | unsigned long, | |
5560 | int, int, int, | |
5561 | void *), | |
5562 | void *data) | |
5563 | { | |
5564 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5565 | ||
5566 | return iterate_over_mappings (pi, func, data, | |
5567 | find_memory_regions_callback); | |
5568 | } | |
5569 | ||
5570 | /* Remove the breakpoint that we inserted in __dbx_link(). | |
5571 | Does nothing if the breakpoint hasn't been inserted or has already | |
5572 | been removed. */ | |
5573 | ||
5574 | static void | |
5575 | remove_dbx_link_breakpoint (void) | |
5576 | { | |
5577 | if (dbx_link_bpt_addr == 0) | |
5578 | return; | |
5579 | ||
5580 | if (deprecated_remove_raw_breakpoint (dbx_link_bpt) != 0) | |
5581 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
5582 | ||
5583 | dbx_link_bpt_addr = 0; | |
5584 | dbx_link_bpt = NULL; | |
5585 | } | |
5586 | ||
5587 | /* Return the address of the __dbx_link() function in the file | |
5588 | refernced by ABFD by scanning its symbol table. Return 0 if | |
5589 | the symbol was not found. */ | |
5590 | ||
5591 | static CORE_ADDR | |
5592 | dbx_link_addr (bfd *abfd) | |
5593 | { | |
5594 | long storage_needed; | |
5595 | asymbol **symbol_table; | |
5596 | long number_of_symbols; | |
5597 | long i; | |
5598 | ||
5599 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
5600 | if (storage_needed <= 0) | |
5601 | return 0; | |
5602 | ||
5603 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
5604 | make_cleanup (xfree, symbol_table); | |
5605 | ||
5606 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
5607 | ||
5608 | for (i = 0; i < number_of_symbols; i++) | |
5609 | { | |
5610 | asymbol *sym = symbol_table[i]; | |
5611 | ||
5612 | if ((sym->flags & BSF_GLOBAL) | |
5613 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) | |
5614 | return (sym->value + sym->section->vma); | |
5615 | } | |
5616 | ||
5617 | /* Symbol not found, return NULL. */ | |
5618 | return 0; | |
5619 | } | |
5620 | ||
5621 | /* Search the symbol table of the file referenced by FD for a symbol | |
5622 | named __dbx_link(). If found, then insert a breakpoint at this location, | |
5623 | and return nonzero. Return zero otherwise. */ | |
5624 | ||
5625 | static int | |
5626 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
5627 | { | |
5628 | bfd *abfd; | |
5629 | long storage_needed; | |
5630 | CORE_ADDR sym_addr; | |
5631 | ||
5632 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
5633 | if (abfd == NULL) | |
5634 | { | |
5635 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
5636 | return 0; | |
5637 | } | |
5638 | ||
5639 | if (!bfd_check_format (abfd, bfd_object)) | |
5640 | { | |
5641 | /* Not the correct format, so we can not possibly find the dbx_link | |
5642 | symbol in it. */ | |
5643 | bfd_close (abfd); | |
5644 | return 0; | |
5645 | } | |
5646 | ||
5647 | sym_addr = dbx_link_addr (abfd); | |
5648 | if (sym_addr != 0) | |
5649 | { | |
5650 | /* Insert the breakpoint. */ | |
5651 | dbx_link_bpt_addr = sym_addr; | |
5652 | dbx_link_bpt = deprecated_insert_raw_breakpoint (sym_addr); | |
5653 | if (dbx_link_bpt == NULL) | |
5654 | { | |
5655 | warning (_("Failed to insert dbx_link breakpoint.")); | |
5656 | bfd_close (abfd); | |
5657 | return 0; | |
5658 | } | |
5659 | bfd_close (abfd); | |
5660 | return 1; | |
5661 | } | |
5662 | ||
5663 | bfd_close (abfd); | |
5664 | return 0; | |
5665 | } | |
5666 | ||
5667 | /* If the given memory region MAP contains a symbol named __dbx_link, | |
5668 | insert a breakpoint at this location and return nonzero. Return | |
5669 | zero otherwise. */ | |
5670 | ||
5671 | static int | |
5672 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
5673 | int (*child_func) (), | |
5674 | void *data) | |
5675 | { | |
5676 | procinfo *pi = (procinfo *) data; | |
5677 | ||
5678 | /* We know the symbol we're looking for is in a text region, so | |
5679 | only look for it if the region is a text one. */ | |
5680 | if (map->pr_mflags & MA_EXEC) | |
5681 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
5682 | ||
5683 | return 0; | |
5684 | } | |
5685 | ||
5686 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
5687 | insert a breakpoint at its location, and return nonzero. Return zero | |
5688 | otherwise. */ | |
5689 | ||
5690 | static int | |
5691 | insert_dbx_link_breakpoint (procinfo *pi) | |
5692 | { | |
5693 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
5694 | } | |
5695 | ||
5696 | /* | |
5697 | * Function: mappingflags | |
5698 | * | |
5699 | * Returns an ascii representation of a memory mapping's flags. | |
5700 | */ | |
5701 | ||
5702 | static char * | |
5703 | mappingflags (long flags) | |
5704 | { | |
5705 | static char asciiflags[8]; | |
5706 | ||
5707 | strcpy (asciiflags, "-------"); | |
5708 | #if defined (MA_PHYS) | |
5709 | if (flags & MA_PHYS) | |
5710 | asciiflags[0] = 'd'; | |
5711 | #endif | |
5712 | if (flags & MA_STACK) | |
5713 | asciiflags[1] = 's'; | |
5714 | if (flags & MA_BREAK) | |
5715 | asciiflags[2] = 'b'; | |
5716 | if (flags & MA_SHARED) | |
5717 | asciiflags[3] = 's'; | |
5718 | if (flags & MA_READ) | |
5719 | asciiflags[4] = 'r'; | |
5720 | if (flags & MA_WRITE) | |
5721 | asciiflags[5] = 'w'; | |
5722 | if (flags & MA_EXEC) | |
5723 | asciiflags[6] = 'x'; | |
5724 | return (asciiflags); | |
5725 | } | |
5726 | ||
5727 | /* | |
5728 | * Function: info_mappings_callback | |
5729 | * | |
5730 | * Callback function, does the actual work for 'info proc mappings'. | |
5731 | */ | |
5732 | ||
5733 | static int | |
5734 | info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused) | |
5735 | { | |
5736 | char *data_fmt_string; | |
5737 | ||
5738 | if (gdbarch_addr_bit (current_gdbarch) == 32) | |
5739 | data_fmt_string = "\t%#10lx %#10lx %#10x %#10x %7s\n"; | |
5740 | else | |
5741 | data_fmt_string = " %#18lx %#18lx %#10x %#10x %7s\n"; | |
5742 | ||
5743 | printf_filtered (data_fmt_string, | |
5744 | (unsigned long) map->pr_vaddr, | |
5745 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
5746 | map->pr_size, | |
5747 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ | |
5748 | (unsigned int) map->pr_offset, | |
5749 | #else | |
5750 | map->pr_off, | |
5751 | #endif | |
5752 | mappingflags (map->pr_mflags)); | |
5753 | ||
5754 | return 0; | |
5755 | } | |
5756 | ||
5757 | /* | |
5758 | * Function: info_proc_mappings | |
5759 | * | |
5760 | * Implement the "info proc mappings" subcommand. | |
5761 | */ | |
5762 | ||
5763 | static void | |
5764 | info_proc_mappings (procinfo *pi, int summary) | |
5765 | { | |
5766 | char *header_fmt_string; | |
5767 | ||
5768 | if (gdbarch_ptr_bit (current_gdbarch) == 32) | |
5769 | header_fmt_string = "\t%10s %10s %10s %10s %7s\n"; | |
5770 | else | |
5771 | header_fmt_string = " %18s %18s %10s %10s %7s\n"; | |
5772 | ||
5773 | if (summary) | |
5774 | return; /* No output for summary mode. */ | |
5775 | ||
5776 | printf_filtered (_("Mapped address spaces:\n\n")); | |
5777 | printf_filtered (header_fmt_string, | |
5778 | "Start Addr", | |
5779 | " End Addr", | |
5780 | " Size", | |
5781 | " Offset", | |
5782 | "Flags"); | |
5783 | ||
5784 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); | |
5785 | printf_filtered ("\n"); | |
5786 | } | |
5787 | ||
5788 | /* | |
5789 | * Function: info_proc_cmd | |
5790 | * | |
5791 | * Implement the "info proc" command. | |
5792 | */ | |
5793 | ||
5794 | static void | |
5795 | info_proc_cmd (char *args, int from_tty) | |
5796 | { | |
5797 | struct cleanup *old_chain; | |
5798 | procinfo *process = NULL; | |
5799 | procinfo *thread = NULL; | |
5800 | char **argv = NULL; | |
5801 | char *tmp = NULL; | |
5802 | int pid = 0; | |
5803 | int tid = 0; | |
5804 | int mappings = 0; | |
5805 | ||
5806 | old_chain = make_cleanup (null_cleanup, 0); | |
5807 | if (args) | |
5808 | { | |
5809 | if ((argv = buildargv (args)) == NULL) | |
5810 | nomem (0); | |
5811 | else | |
5812 | make_cleanup_freeargv (argv); | |
5813 | } | |
5814 | while (argv != NULL && *argv != NULL) | |
5815 | { | |
5816 | if (isdigit (argv[0][0])) | |
5817 | { | |
5818 | pid = strtoul (argv[0], &tmp, 10); | |
5819 | if (*tmp == '/') | |
5820 | tid = strtoul (++tmp, NULL, 10); | |
5821 | } | |
5822 | else if (argv[0][0] == '/') | |
5823 | { | |
5824 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5825 | } | |
5826 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) | |
5827 | { | |
5828 | mappings = 1; | |
5829 | } | |
5830 | else | |
5831 | { | |
5832 | /* [...] */ | |
5833 | } | |
5834 | argv++; | |
5835 | } | |
5836 | if (pid == 0) | |
5837 | pid = PIDGET (inferior_ptid); | |
5838 | if (pid == 0) | |
5839 | error (_("No current process: you must name one.")); | |
5840 | else | |
5841 | { | |
5842 | /* Have pid, will travel. | |
5843 | First see if it's a process we're already debugging. */ | |
5844 | process = find_procinfo (pid, 0); | |
5845 | if (process == NULL) | |
5846 | { | |
5847 | /* No. So open a procinfo for it, but | |
5848 | remember to close it again when finished. */ | |
5849 | process = create_procinfo (pid, 0); | |
5850 | make_cleanup (do_destroy_procinfo_cleanup, process); | |
5851 | if (!open_procinfo_files (process, FD_CTL)) | |
5852 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5853 | } | |
5854 | } | |
5855 | if (tid != 0) | |
5856 | thread = create_procinfo (pid, tid); | |
5857 | ||
5858 | if (process) | |
5859 | { | |
5860 | printf_filtered (_("process %d flags:\n"), process->pid); | |
5861 | proc_prettyprint_flags (proc_flags (process), 1); | |
5862 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5863 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5864 | if (proc_get_nthreads (process) > 1) | |
5865 | printf_filtered ("Process has %d threads.\n", | |
5866 | proc_get_nthreads (process)); | |
5867 | } | |
5868 | if (thread) | |
5869 | { | |
5870 | printf_filtered (_("thread %d flags:\n"), thread->tid); | |
5871 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5872 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5873 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5874 | } | |
5875 | ||
5876 | if (mappings) | |
5877 | { | |
5878 | info_proc_mappings (process, 0); | |
5879 | } | |
5880 | ||
5881 | do_cleanups (old_chain); | |
5882 | } | |
5883 | ||
5884 | /* Modify the status of the system call identified by SYSCALLNUM in | |
5885 | the set of syscalls that are currently traced/debugged. | |
5886 | ||
5887 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
5888 | will be updated. Otherwise, the exit syscalls set will be updated. | |
5889 | ||
5890 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they | |
5891 | will be disabled. */ | |
5892 | ||
5893 | static void | |
5894 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
5895 | int mode, int from_tty) | |
5896 | { | |
5897 | sysset_t *sysset; | |
5898 | ||
5899 | if (entry_or_exit == PR_SYSENTRY) | |
5900 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5901 | else | |
5902 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5903 | ||
5904 | if (sysset == NULL) | |
5905 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5906 | ||
5907 | if (mode == FLAG_SET) | |
5908 | gdb_praddsysset (sysset, syscallnum); | |
5909 | else | |
5910 | gdb_prdelsysset (sysset, syscallnum); | |
5911 | ||
5912 | if (entry_or_exit == PR_SYSENTRY) | |
5913 | { | |
5914 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5915 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5916 | } | |
5917 | else | |
5918 | { | |
5919 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5920 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5921 | } | |
5922 | } | |
5923 | ||
5924 | static void | |
5925 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) | |
5926 | { | |
5927 | procinfo *pi; | |
5928 | ||
5929 | if (PIDGET (inferior_ptid) <= 0) | |
5930 | error (_("you must be debugging a process to use this command.")); | |
5931 | ||
5932 | if (args == NULL || args[0] == 0) | |
5933 | error_no_arg (_("system call to trace")); | |
5934 | ||
5935 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5936 | if (isdigit (args[0])) | |
5937 | { | |
5938 | const int syscallnum = atoi (args); | |
5939 | ||
5940 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); | |
5941 | } | |
5942 | } | |
5943 | ||
5944 | static void | |
5945 | proc_trace_sysentry_cmd (char *args, int from_tty) | |
5946 | { | |
5947 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); | |
5948 | } | |
5949 | ||
5950 | static void | |
5951 | proc_trace_sysexit_cmd (char *args, int from_tty) | |
5952 | { | |
5953 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
5954 | } | |
5955 | ||
5956 | static void | |
5957 | proc_untrace_sysentry_cmd (char *args, int from_tty) | |
5958 | { | |
5959 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5960 | } | |
5961 | ||
5962 | static void | |
5963 | proc_untrace_sysexit_cmd (char *args, int from_tty) | |
5964 | { | |
5965 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); | |
5966 | } | |
5967 | ||
5968 | ||
5969 | void | |
5970 | _initialize_procfs (void) | |
5971 | { | |
5972 | init_procfs_ops (); | |
5973 | add_target (&procfs_ops); | |
5974 | add_info ("proc", info_proc_cmd, _("\ | |
5975 | Show /proc process information about any running process.\n\ | |
5976 | Specify process id, or use the program being debugged by default.\n\ | |
5977 | Specify keyword 'mappings' for detailed info on memory mappings.")); | |
5978 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, | |
5979 | _("Give a trace of entries into the syscall.")); | |
5980 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5981 | _("Give a trace of exits from the syscall.")); | |
5982 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5983 | _("Cancel a trace of entries into the syscall.")); | |
5984 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5985 | _("Cancel a trace of exits from the syscall.")); | |
5986 | } | |
5987 | ||
5988 | /* =================== END, GDB "MODULE" =================== */ | |
5989 | ||
5990 | ||
5991 | ||
5992 | /* miscellaneous stubs: */ | |
5993 | /* The following satisfy a few random symbols mostly created by */ | |
5994 | /* the solaris threads implementation, which I will chase down */ | |
5995 | /* later. */ | |
5996 | ||
5997 | /* | |
5998 | * Return a pid for which we guarantee | |
5999 | * we will be able to find a 'live' procinfo. | |
6000 | */ | |
6001 | ||
6002 | ptid_t | |
6003 | procfs_first_available (void) | |
6004 | { | |
6005 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); | |
6006 | } | |
6007 | ||
6008 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
6009 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) | |
6010 | /* gcore only implemented on solaris and unixware (so far) */ | |
6011 | ||
6012 | static char * | |
6013 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, | |
6014 | char *note_data, int *note_size) | |
6015 | { | |
6016 | struct regcache *regcache = get_thread_regcache (ptid); | |
6017 | gdb_gregset_t gregs; | |
6018 | gdb_fpregset_t fpregs; | |
6019 | unsigned long merged_pid; | |
6020 | ||
6021 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
6022 | ||
6023 | fill_gregset (regcache, &gregs, -1); | |
6024 | #if defined (UNIXWARE) | |
6025 | note_data = (char *) elfcore_write_lwpstatus (obfd, | |
6026 | note_data, | |
6027 | note_size, | |
6028 | merged_pid, | |
6029 | stop_signal, | |
6030 | &gregs); | |
6031 | #else | |
6032 | note_data = (char *) elfcore_write_prstatus (obfd, | |
6033 | note_data, | |
6034 | note_size, | |
6035 | merged_pid, | |
6036 | stop_signal, | |
6037 | &gregs); | |
6038 | #endif | |
6039 | fill_fpregset (regcache, &fpregs, -1); | |
6040 | note_data = (char *) elfcore_write_prfpreg (obfd, | |
6041 | note_data, | |
6042 | note_size, | |
6043 | &fpregs, | |
6044 | sizeof (fpregs)); | |
6045 | return note_data; | |
6046 | } | |
6047 | ||
6048 | struct procfs_corefile_thread_data { | |
6049 | bfd *obfd; | |
6050 | char *note_data; | |
6051 | int *note_size; | |
6052 | }; | |
6053 | ||
6054 | static int | |
6055 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) | |
6056 | { | |
6057 | struct procfs_corefile_thread_data *args = data; | |
6058 | ||
6059 | if (pi != NULL && thread->tid != 0) | |
6060 | { | |
6061 | ptid_t saved_ptid = inferior_ptid; | |
6062 | inferior_ptid = MERGEPID (pi->pid, thread->tid); | |
6063 | args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid, | |
6064 | args->note_data, | |
6065 | args->note_size); | |
6066 | inferior_ptid = saved_ptid; | |
6067 | } | |
6068 | return 0; | |
6069 | } | |
6070 | ||
6071 | static char * | |
6072 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6073 | { | |
6074 | struct cleanup *old_chain; | |
6075 | gdb_gregset_t gregs; | |
6076 | gdb_fpregset_t fpregs; | |
6077 | char fname[16] = {'\0'}; | |
6078 | char psargs[80] = {'\0'}; | |
6079 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
6080 | char *note_data = NULL; | |
6081 | char *inf_args; | |
6082 | struct procfs_corefile_thread_data thread_args; | |
6083 | char *auxv; | |
6084 | int auxv_len; | |
6085 | ||
6086 | if (get_exec_file (0)) | |
6087 | { | |
6088 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
6089 | strncpy (psargs, get_exec_file (0), | |
6090 | sizeof (psargs)); | |
6091 | ||
6092 | inf_args = get_inferior_args (); | |
6093 | if (inf_args && *inf_args && | |
6094 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
6095 | { | |
6096 | strncat (psargs, " ", | |
6097 | sizeof (psargs) - strlen (psargs)); | |
6098 | strncat (psargs, inf_args, | |
6099 | sizeof (psargs) - strlen (psargs)); | |
6100 | } | |
6101 | } | |
6102 | ||
6103 | note_data = (char *) elfcore_write_prpsinfo (obfd, | |
6104 | note_data, | |
6105 | note_size, | |
6106 | fname, | |
6107 | psargs); | |
6108 | ||
6109 | #ifdef UNIXWARE | |
6110 | fill_gregset (get_current_regcache (), &gregs, -1); | |
6111 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
6112 | PIDGET (inferior_ptid), | |
6113 | stop_signal, &gregs); | |
6114 | #endif | |
6115 | ||
6116 | thread_args.obfd = obfd; | |
6117 | thread_args.note_data = note_data; | |
6118 | thread_args.note_size = note_size; | |
6119 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); | |
6120 | ||
6121 | if (thread_args.note_data == note_data) | |
6122 | { | |
6123 | /* iterate_over_threads didn't come up with any threads; | |
6124 | just use inferior_ptid. */ | |
6125 | note_data = procfs_do_thread_registers (obfd, inferior_ptid, | |
6126 | note_data, note_size); | |
6127 | } | |
6128 | else | |
6129 | { | |
6130 | note_data = thread_args.note_data; | |
6131 | } | |
6132 | ||
6133 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, | |
6134 | NULL, &auxv); | |
6135 | if (auxv_len > 0) | |
6136 | { | |
6137 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
6138 | "CORE", NT_AUXV, auxv, auxv_len); | |
6139 | xfree (auxv); | |
6140 | } | |
6141 | ||
6142 | make_cleanup (xfree, note_data); | |
6143 | return note_data; | |
6144 | } | |
6145 | #else /* !(Solaris or Unixware) */ | |
6146 | static char * | |
6147 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6148 | { | |
6149 | error (_("gcore not implemented for this host.")); | |
6150 | return NULL; /* lint */ | |
6151 | } | |
6152 | #endif /* Solaris or Unixware */ | |
6153 | /* =================== END GCORE .NOTE "MODULE" =================== */ |