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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
be4d1333 | 2 | Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
c3f6f71d JM |
3 | Written by Michael Snyder at Cygnus Solutions. |
4 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 5 | |
c3f6f71d | 6 | This file is part of GDB. |
c906108c | 7 | |
c3f6f71d JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c3f6f71d JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c3f6f71d JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software Foundation, | |
20 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
c906108c | 21 | |
c3f6f71d JM |
22 | #include "defs.h" |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "gdbcore.h" | |
65554fef | 26 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 27 | #include "gdbcmd.h" |
0fda6bd2 | 28 | #include "gdbthread.h" |
c906108c | 29 | |
c3f6f71d JM |
30 | #if defined (NEW_PROC_API) |
31 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
32 | #endif | |
c906108c | 33 | |
c3f6f71d | 34 | #include <sys/procfs.h> |
37de36c6 | 35 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 36 | #include <sys/fault.h> |
37de36c6 KB |
37 | #endif |
38 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 39 | #include <sys/syscall.h> |
37de36c6 | 40 | #endif |
c3f6f71d | 41 | #include <sys/errno.h> |
0fda6bd2 JM |
42 | #include <sys/wait.h> |
43 | #include <signal.h> | |
44 | #include <ctype.h> | |
45 | ||
c3f6f71d JM |
46 | /* |
47 | * PROCFS.C | |
48 | * | |
49 | * This module provides the interface between GDB and the | |
50 | * /proc file system, which is used on many versions of Unix | |
51 | * as a means for debuggers to control other processes. | |
52 | * Examples of the systems that use this interface are: | |
53 | * Irix | |
54 | * Solaris | |
55 | * OSF | |
56 | * Unixware | |
37de36c6 | 57 | * AIX5 |
c3f6f71d | 58 | * |
65554fef | 59 | * /proc works by imitating a file system: you open a simulated file |
c3f6f71d JM |
60 | * that represents the process you wish to interact with, and |
61 | * perform operations on that "file" in order to examine or change | |
62 | * the state of the other process. | |
63 | * | |
64 | * The most important thing to know about /proc and this module | |
65 | * is that there are two very different interfaces to /proc: | |
66 | * One that uses the ioctl system call, and | |
67 | * another that uses read and write system calls. | |
68 | * This module has to support both /proc interfaces. This means | |
69 | * that there are two different ways of doing every basic operation. | |
70 | * | |
71 | * In order to keep most of the code simple and clean, I have | |
72 | * defined an interface "layer" which hides all these system calls. | |
73 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
74 | * and most or all occurrances of this ifdef should be confined to | |
75 | * this interface layer. | |
c906108c SS |
76 | */ |
77 | ||
78 | ||
c3f6f71d JM |
79 | /* Determine which /proc API we are using: |
80 | The ioctl API defines PIOCSTATUS, while | |
81 | the read/write (multiple fd) API never does. */ | |
c906108c | 82 | |
c3f6f71d | 83 | #ifdef NEW_PROC_API |
c906108c | 84 | #include <sys/types.h> |
4b14d3e4 | 85 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 86 | #endif |
c906108c | 87 | |
c3f6f71d JM |
88 | #include <fcntl.h> /* for O_RDONLY */ |
89 | #include <unistd.h> /* for "X_OK" */ | |
90 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 91 | |
103b3ef5 MS |
92 | /* Note: procfs-utils.h must be included after the above system header |
93 | files, because it redefines various system calls using macros. | |
94 | This may be incompatible with the prototype declarations. */ | |
95 | ||
103b3ef5 MS |
96 | #include "proc-utils.h" |
97 | ||
c60c0f5f MS |
98 | /* Prototypes for supply_gregset etc. */ |
99 | #include "gregset.h" | |
100 | ||
c3f6f71d | 101 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 102 | |
c3f6f71d JM |
103 | /* |
104 | * This module defines the GDB target vector and its methods. | |
105 | */ | |
c906108c | 106 | |
8ab86381 | 107 | static void procfs_open (char *, int); |
a14ed312 KB |
108 | static void procfs_attach (char *, int); |
109 | static void procfs_detach (char *, int); | |
39f77062 | 110 | static void procfs_resume (ptid_t, int, enum target_signal); |
a14ed312 KB |
111 | static int procfs_can_run (void); |
112 | static void procfs_stop (void); | |
113 | static void procfs_files_info (struct target_ops *); | |
114 | static void procfs_fetch_registers (int); | |
115 | static void procfs_store_registers (int); | |
39f77062 | 116 | static void procfs_notice_signals (ptid_t); |
a14ed312 KB |
117 | static void procfs_prepare_to_store (void); |
118 | static void procfs_kill_inferior (void); | |
119 | static void procfs_mourn_inferior (void); | |
120 | static void procfs_create_inferior (char *, char *, char **); | |
39f77062 | 121 | static ptid_t procfs_wait (ptid_t, struct target_waitstatus *); |
043780a1 AC |
122 | static int procfs_xfer_memory (CORE_ADDR, char *, int, int, |
123 | struct mem_attrib *attrib, | |
124 | struct target_ops *); | |
a14ed312 | 125 | |
39f77062 | 126 | static int procfs_thread_alive (ptid_t); |
a14ed312 KB |
127 | |
128 | void procfs_find_new_threads (void); | |
39f77062 | 129 | char *procfs_pid_to_str (ptid_t); |
c3f6f71d | 130 | |
be4d1333 MS |
131 | static int proc_find_memory_regions (int (*) (CORE_ADDR, |
132 | unsigned long, | |
133 | int, int, int, | |
134 | void *), | |
135 | void *); | |
136 | ||
137 | static char * procfs_make_note_section (bfd *, int *); | |
138 | ||
1e03ad20 KB |
139 | static int procfs_can_use_hw_breakpoint (int, int, int); |
140 | ||
c3f6f71d | 141 | struct target_ops procfs_ops; /* the target vector */ |
c906108c | 142 | |
c3f6f71d | 143 | static void |
fba45db2 | 144 | init_procfs_ops (void) |
c3f6f71d | 145 | { |
be4d1333 MS |
146 | procfs_ops.to_shortname = "procfs"; |
147 | procfs_ops.to_longname = "Unix /proc child process"; | |
148 | procfs_ops.to_doc = | |
c3f6f71d | 149 | "Unix /proc child process (started by the \"run\" command)."; |
be4d1333 MS |
150 | procfs_ops.to_open = procfs_open; |
151 | procfs_ops.to_can_run = procfs_can_run; | |
152 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
153 | procfs_ops.to_kill = procfs_kill_inferior; | |
154 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
155 | procfs_ops.to_attach = procfs_attach; | |
156 | procfs_ops.to_detach = procfs_detach; | |
157 | procfs_ops.to_wait = procfs_wait; | |
158 | procfs_ops.to_resume = procfs_resume; | |
159 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
160 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
161 | procfs_ops.to_store_registers = procfs_store_registers; | |
162 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
163 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
164 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
165 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
166 | procfs_ops.to_files_info = procfs_files_info; | |
167 | procfs_ops.to_stop = procfs_stop; | |
168 | ||
169 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
170 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
c3f6f71d | 171 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
be4d1333 MS |
172 | procfs_ops.to_terminal_ours = terminal_ours; |
173 | procfs_ops.to_terminal_info = child_terminal_info; | |
174 | ||
175 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
176 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
177 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
178 | ||
179 | procfs_ops.to_has_all_memory = 1; | |
180 | procfs_ops.to_has_memory = 1; | |
181 | procfs_ops.to_has_execution = 1; | |
182 | procfs_ops.to_has_stack = 1; | |
183 | procfs_ops.to_has_registers = 1; | |
184 | procfs_ops.to_stratum = process_stratum; | |
185 | procfs_ops.to_has_thread_control = tc_schedlock; | |
186 | procfs_ops.to_find_memory_regions = proc_find_memory_regions; | |
187 | procfs_ops.to_make_corefile_notes = procfs_make_note_section; | |
1e03ad20 | 188 | procfs_ops.to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
be4d1333 | 189 | procfs_ops.to_magic = OPS_MAGIC; |
c3f6f71d | 190 | } |
c906108c | 191 | |
c3f6f71d JM |
192 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
193 | ||
c3f6f71d JM |
194 | /* |
195 | * World Unification: | |
196 | * | |
197 | * Put any typedefs, defines etc. here that are required for | |
198 | * the unification of code that handles different versions of /proc. | |
199 | */ | |
200 | ||
201 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 202 | #ifdef WA_READ |
c3f6f71d JM |
203 | enum { READ_WATCHFLAG = WA_READ, |
204 | WRITE_WATCHFLAG = WA_WRITE, | |
205 | EXEC_WATCHFLAG = WA_EXEC, | |
206 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
207 | }; | |
208 | #endif | |
209 | #else /* Irix method for watchpoints */ | |
210 | enum { READ_WATCHFLAG = MA_READ, | |
211 | WRITE_WATCHFLAG = MA_WRITE, | |
212 | EXEC_WATCHFLAG = MA_EXEC, | |
213 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
214 | }; | |
215 | #endif | |
216 | ||
37de36c6 KB |
217 | /* gdb_sigset_t */ |
218 | #ifdef HAVE_PR_SIGSET_T | |
219 | typedef pr_sigset_t gdb_sigset_t; | |
220 | #else | |
221 | typedef sigset_t gdb_sigset_t; | |
222 | #endif | |
223 | ||
224 | /* sigaction */ | |
225 | #ifdef HAVE_PR_SIGACTION64_T | |
226 | typedef pr_sigaction64_t gdb_sigaction_t; | |
227 | #else | |
228 | typedef struct sigaction gdb_sigaction_t; | |
229 | #endif | |
230 | ||
231 | /* siginfo */ | |
232 | #ifdef HAVE_PR_SIGINFO64_T | |
233 | typedef pr_siginfo64_t gdb_siginfo_t; | |
234 | #else | |
235 | typedef struct siginfo gdb_siginfo_t; | |
236 | #endif | |
237 | ||
238 | /* gdb_premptysysset */ | |
239 | #ifdef premptysysset | |
240 | #define gdb_premptysysset premptysysset | |
241 | #else | |
242 | #define gdb_premptysysset premptyset | |
243 | #endif | |
244 | ||
245 | /* praddsysset */ | |
246 | #ifdef praddsysset | |
247 | #define gdb_praddsysset praddsysset | |
248 | #else | |
249 | #define gdb_praddsysset praddset | |
250 | #endif | |
251 | ||
252 | /* prdelsysset */ | |
253 | #ifdef prdelsysset | |
254 | #define gdb_prdelsysset prdelsysset | |
255 | #else | |
256 | #define gdb_prdelsysset prdelset | |
257 | #endif | |
258 | ||
259 | /* prissyssetmember */ | |
260 | #ifdef prissyssetmember | |
261 | #define gdb_pr_issyssetmember prissyssetmember | |
262 | #else | |
263 | #define gdb_pr_issyssetmember prismember | |
264 | #endif | |
265 | ||
266 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
267 | as intuitively descriptive as it could be, so we'll define | |
268 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
269 | this writing, this feature is only found on AIX5 systems and | |
270 | basically means that the set of syscalls is not fixed. I.e, | |
271 | there's no nice table that one can #include to get all of the | |
272 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
273 | for each process. We are at least guaranteed that they won't | |
274 | change over the lifetime of the process. But each process could | |
275 | (in theory) have different syscall numbers. | |
276 | */ | |
277 | #ifdef HAVE_PRSYSENT_T | |
278 | #define DYNAMIC_SYSCALLS | |
279 | #endif | |
c3f6f71d JM |
280 | |
281 | ||
282 | ||
283 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
284 | ||
285 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
286 | ||
287 | /* The procinfo struct is a wrapper to hold all the state information | |
288 | concerning a /proc process. There should be exactly one procinfo | |
289 | for each process, and since GDB currently can debug only one | |
290 | process at a time, that means there should be only one procinfo. | |
291 | All of the LWP's of a process can be accessed indirectly thru the | |
292 | single process procinfo. | |
293 | ||
294 | However, against the day when GDB may debug more than one process, | |
295 | this data structure is kept in a list (which for now will hold no | |
296 | more than one member), and many functions will have a pointer to a | |
297 | procinfo as an argument. | |
298 | ||
299 | There will be a separate procinfo structure for use by the (not yet | |
300 | implemented) "info proc" command, so that we can print useful | |
301 | information about any random process without interfering with the | |
302 | inferior's procinfo information. */ | |
303 | ||
304 | #ifdef NEW_PROC_API | |
305 | /* format strings for /proc paths */ | |
306 | # ifndef CTL_PROC_NAME_FMT | |
307 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
308 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
309 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
310 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
311 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
312 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
313 | # endif | |
314 | /* the name of the proc status struct depends on the implementation */ | |
315 | typedef pstatus_t gdb_prstatus_t; | |
316 | typedef lwpstatus_t gdb_lwpstatus_t; | |
317 | #else /* ! NEW_PROC_API */ | |
318 | /* format strings for /proc paths */ | |
319 | # ifndef CTL_PROC_NAME_FMT | |
320 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
321 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
322 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
323 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
324 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
325 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
326 | # endif | |
c906108c | 327 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 328 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
329 | typedef prstatus_t gdb_lwpstatus_t; |
330 | #endif /* NEW_PROC_API */ | |
c906108c | 331 | |
c3f6f71d JM |
332 | typedef struct procinfo { |
333 | struct procinfo *next; | |
334 | int pid; /* Process ID */ | |
335 | int tid; /* Thread/LWP id */ | |
c906108c | 336 | |
c3f6f71d JM |
337 | /* process state */ |
338 | int was_stopped; | |
339 | int ignore_next_sigstop; | |
c906108c | 340 | |
c3f6f71d JM |
341 | /* The following four fd fields may be identical, or may contain |
342 | several different fd's, depending on the version of /proc | |
343 | (old ioctl or new read/write). */ | |
c906108c | 344 | |
c3f6f71d JM |
345 | int ctl_fd; /* File descriptor for /proc control file */ |
346 | /* | |
347 | * The next three file descriptors are actually only needed in the | |
348 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
349 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
350 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
351 | * implementation) filling them with copies of the control fd. | |
352 | */ | |
353 | int status_fd; /* File descriptor for /proc status file */ | |
354 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 355 | |
c3f6f71d | 356 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 357 | |
c3f6f71d | 358 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
359 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
360 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
361 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
362 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 363 | |
c3f6f71d | 364 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 365 | |
c3f6f71d JM |
366 | #ifndef NEW_PROC_API |
367 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 368 | #endif |
37de36c6 KB |
369 | |
370 | #ifdef DYNAMIC_SYSCALLS | |
371 | int num_syscalls; /* Total number of syscalls */ | |
372 | char **syscall_names; /* Syscall number to name map */ | |
373 | #endif | |
c3f6f71d JM |
374 | |
375 | struct procinfo *thread_list; | |
c906108c | 376 | |
c3f6f71d JM |
377 | int status_valid : 1; |
378 | int gregs_valid : 1; | |
379 | int fpregs_valid : 1; | |
380 | int threads_valid: 1; | |
381 | } procinfo; | |
c906108c | 382 | |
c3f6f71d | 383 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 384 | |
c3f6f71d | 385 | /* Function prototypes for procinfo module: */ |
c906108c | 386 | |
a14ed312 KB |
387 | static procinfo *find_procinfo_or_die (int pid, int tid); |
388 | static procinfo *find_procinfo (int pid, int tid); | |
389 | static procinfo *create_procinfo (int pid, int tid); | |
390 | static void destroy_procinfo (procinfo * p); | |
004527cb | 391 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
392 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
393 | static int open_procinfo_files (procinfo * p, int which); | |
394 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
395 | static int sysset_t_size (procinfo *p); |
396 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
397 | #ifdef DYNAMIC_SYSCALLS | |
398 | static void load_syscalls (procinfo *pi); | |
399 | static void free_syscalls (procinfo *pi); | |
400 | static int find_syscall (procinfo *pi, char *name); | |
401 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 402 | |
c3f6f71d JM |
403 | /* The head of the procinfo list: */ |
404 | static procinfo * procinfo_list; | |
c906108c | 405 | |
c3f6f71d JM |
406 | /* |
407 | * Function: find_procinfo | |
408 | * | |
409 | * Search the procinfo list. | |
410 | * | |
411 | * Returns: pointer to procinfo, or NULL if not found. | |
412 | */ | |
c906108c | 413 | |
c3f6f71d | 414 | static procinfo * |
fba45db2 | 415 | find_procinfo (int pid, int tid) |
c5aa993b | 416 | { |
c3f6f71d | 417 | procinfo *pi; |
c906108c | 418 | |
c3f6f71d JM |
419 | for (pi = procinfo_list; pi; pi = pi->next) |
420 | if (pi->pid == pid) | |
421 | break; | |
c906108c | 422 | |
c3f6f71d JM |
423 | if (pi) |
424 | if (tid) | |
425 | { | |
426 | /* Don't check threads_valid. If we're updating the | |
427 | thread_list, we want to find whatever threads are already | |
428 | here. This means that in general it is the caller's | |
429 | responsibility to check threads_valid and update before | |
430 | calling find_procinfo, if the caller wants to find a new | |
431 | thread. */ | |
432 | ||
433 | for (pi = pi->thread_list; pi; pi = pi->next) | |
434 | if (pi->tid == tid) | |
435 | break; | |
436 | } | |
c906108c | 437 | |
c3f6f71d JM |
438 | return pi; |
439 | } | |
c906108c | 440 | |
c3f6f71d JM |
441 | /* |
442 | * Function: find_procinfo_or_die | |
443 | * | |
444 | * Calls find_procinfo, but errors on failure. | |
445 | */ | |
c906108c | 446 | |
c3f6f71d | 447 | static procinfo * |
fba45db2 | 448 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
449 | { |
450 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 451 | |
c3f6f71d | 452 | if (pi == NULL) |
0fda6bd2 JM |
453 | { |
454 | if (tid) | |
455 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
456 | pid, tid); | |
457 | else | |
458 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
459 | } | |
c3f6f71d JM |
460 | return pi; |
461 | } | |
c906108c | 462 | |
4d1bcd09 KB |
463 | /* open_with_retry() is a wrapper for open(). The appropriate |
464 | open() call is attempted; if unsuccessful, it will be retried as | |
465 | many times as needed for the EAGAIN and EINTR conditions. | |
466 | ||
467 | For other conditions, open_with_retry() will retry the open() a | |
468 | limited number of times. In addition, a short sleep is imposed | |
469 | prior to retrying the open(). The reason for this sleep is to give | |
470 | the kernel a chance to catch up and create the file in question in | |
471 | the event that GDB "wins" the race to open a file before the kernel | |
472 | has created it. */ | |
473 | ||
474 | static int | |
475 | open_with_retry (const char *pathname, int flags) | |
476 | { | |
477 | int retries_remaining, status; | |
478 | ||
479 | retries_remaining = 2; | |
480 | ||
481 | while (1) | |
482 | { | |
483 | status = open (pathname, flags); | |
484 | ||
485 | if (status >= 0 || retries_remaining == 0) | |
486 | break; | |
487 | else if (errno != EINTR && errno != EAGAIN) | |
488 | { | |
489 | retries_remaining--; | |
490 | sleep (1); | |
491 | } | |
492 | } | |
493 | ||
494 | return status; | |
495 | } | |
496 | ||
c3f6f71d JM |
497 | /* |
498 | * Function: open_procinfo_files | |
499 | * | |
500 | * Open the file descriptor for the process or LWP. | |
501 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
502 | * the others are opened lazily as needed. | |
503 | * else (if not NEW_PROC_API), there is only one real | |
504 | * file descriptor, but we keep multiple copies of it so that | |
505 | * the code that uses them does not have to be #ifdef'd. | |
506 | * | |
507 | * Return: file descriptor, or zero for failure. | |
508 | */ | |
c906108c | 509 | |
c3f6f71d | 510 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 511 | |
c3f6f71d | 512 | static int |
fba45db2 | 513 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 514 | { |
0fda6bd2 | 515 | #ifdef NEW_PROC_API |
c3f6f71d | 516 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 517 | #endif |
c3f6f71d JM |
518 | int fd; |
519 | ||
520 | /* | |
521 | * This function is getting ALMOST long enough to break up into several. | |
522 | * Here is some rationale: | |
523 | * | |
524 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
525 | * There are several file descriptors that may need to be open | |
526 | * for any given process or LWP. The ones we're intereted in are: | |
527 | * - control (ctl) write-only change the state | |
528 | * - status (status) read-only query the state | |
529 | * - address space (as) read/write access memory | |
530 | * - map (map) read-only virtual addr map | |
531 | * Most of these are opened lazily as they are needed. | |
532 | * The pathnames for the 'files' for an LWP look slightly | |
533 | * different from those of a first-class process: | |
534 | * Pathnames for a process (<proc-id>): | |
535 | * /proc/<proc-id>/ctl | |
536 | * /proc/<proc-id>/status | |
537 | * /proc/<proc-id>/as | |
538 | * /proc/<proc-id>/map | |
539 | * Pathnames for an LWP (lwp-id): | |
540 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
541 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
542 | * An LWP has no map or address space file descriptor, since | |
543 | * the memory map and address space are shared by all LWPs. | |
544 | * | |
545 | * Everyone else (Solaris 2.5, Irix, OSF) | |
546 | * There is only one file descriptor for each process or LWP. | |
547 | * For convenience, we copy the same file descriptor into all | |
548 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
549 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
550 | * doesn't need any #ifdef's. | |
551 | * Pathname for all: | |
552 | * /proc/<proc-id> | |
553 | * | |
554 | * Solaris 2.5 LWP's: | |
555 | * Each LWP has an independent file descriptor, but these | |
556 | * are not obtained via the 'open' system call like the rest: | |
557 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
558 | * to the file descriptor of the parent process. | |
559 | * | |
560 | * OSF threads: | |
561 | * These do not even have their own independent file descriptor. | |
562 | * All operations are carried out on the file descriptor of the | |
563 | * parent process. Therefore we just call open again for each | |
564 | * thread, getting a new handle for the same 'file'. | |
565 | */ | |
566 | ||
567 | #ifdef NEW_PROC_API | |
568 | /* | |
569 | * In this case, there are several different file descriptors that | |
570 | * we might be asked to open. The control file descriptor will be | |
571 | * opened early, but the others will be opened lazily as they are | |
572 | * needed. | |
573 | */ | |
574 | ||
575 | strcpy (tmp, pi->pathname); | |
576 | switch (which) { /* which file descriptor to open? */ | |
577 | case FD_CTL: | |
578 | if (pi->tid) | |
579 | strcat (tmp, "/lwpctl"); | |
580 | else | |
581 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 582 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
583 | if (fd <= 0) |
584 | return 0; /* fail */ | |
585 | pi->ctl_fd = fd; | |
586 | break; | |
587 | case FD_AS: | |
588 | if (pi->tid) | |
589 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
590 | strcat (tmp, "/as"); | |
4d1bcd09 | 591 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
592 | if (fd <= 0) |
593 | return 0; /* fail */ | |
594 | pi->as_fd = fd; | |
595 | break; | |
596 | case FD_STATUS: | |
597 | if (pi->tid) | |
598 | strcat (tmp, "/lwpstatus"); | |
599 | else | |
600 | strcat (tmp, "/status"); | |
4d1bcd09 | 601 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
602 | if (fd <= 0) |
603 | return 0; /* fail */ | |
604 | pi->status_fd = fd; | |
605 | break; | |
606 | default: | |
607 | return 0; /* unknown file descriptor */ | |
608 | } | |
609 | #else /* not NEW_PROC_API */ | |
610 | /* | |
611 | * In this case, there is only one file descriptor for each procinfo | |
612 | * (ie. each process or LWP). In fact, only the file descriptor for | |
613 | * the process can actually be opened by an 'open' system call. | |
614 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
615 | * on the process's file descriptor. | |
616 | * | |
617 | * For convenience, we copy each procinfo's single file descriptor | |
618 | * into all of the fields occupied by the several file descriptors | |
619 | * of the NEW_PROC_API implementation. That way, the code that uses | |
620 | * them can be written without ifdefs. | |
621 | */ | |
622 | ||
623 | ||
624 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
625 | /* Only one FD; just open it. */ |
626 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
627 | return 0; |
628 | #else /* Sol 2.5, Irix, other? */ | |
629 | if (pi->tid == 0) /* Master procinfo for the process */ | |
630 | { | |
4d1bcd09 | 631 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
632 | if (fd <= 0) |
633 | return 0; /* fail */ | |
634 | } | |
635 | else /* LWP thread procinfo */ | |
636 | { | |
637 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
638 | procinfo *process; | |
639 | int lwpid = pi->tid; | |
640 | ||
641 | /* Find the procinfo for the entire process. */ | |
642 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
643 | return 0; /* fail */ | |
644 | ||
645 | /* Now obtain the file descriptor for the LWP. */ | |
646 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
647 | return 0; /* fail */ | |
648 | #else /* Irix, other? */ | |
649 | return 0; /* Don't know how to open threads */ | |
650 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
651 | } | |
652 | #endif /* OSF PIOCTSTATUS */ | |
653 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
654 | #endif /* NEW_PROC_API */ | |
c906108c | 655 | |
c3f6f71d JM |
656 | return 1; /* success */ |
657 | } | |
c906108c | 658 | |
c3f6f71d JM |
659 | /* |
660 | * Function: create_procinfo | |
661 | * | |
662 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 663 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
664 | * |
665 | * Return: pointer to new procinfo struct. | |
666 | */ | |
c906108c | 667 | |
c3f6f71d | 668 | static procinfo * |
fba45db2 | 669 | create_procinfo (int pid, int tid) |
c3f6f71d JM |
670 | { |
671 | procinfo *pi, *parent; | |
c906108c | 672 | |
0d06e24b | 673 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 674 | return pi; /* Already exists, nothing to do. */ |
c906108c | 675 | |
c3f6f71d JM |
676 | /* find parent before doing malloc, to save having to cleanup */ |
677 | if (tid != 0) | |
678 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
679 | create it if it | |
680 | doesn't exist yet? */ | |
c906108c | 681 | |
c3f6f71d JM |
682 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
683 | memset (pi, 0, sizeof (procinfo)); | |
684 | pi->pid = pid; | |
685 | pi->tid = tid; | |
c906108c | 686 | |
37de36c6 KB |
687 | #ifdef DYNAMIC_SYSCALLS |
688 | load_syscalls (pi); | |
689 | #endif | |
690 | ||
1d5e0602 KB |
691 | pi->saved_entryset = sysset_t_alloc (pi); |
692 | pi->saved_exitset = sysset_t_alloc (pi); | |
693 | ||
c3f6f71d JM |
694 | /* Chain into list. */ |
695 | if (tid == 0) | |
696 | { | |
697 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
698 | pi->next = procinfo_list; | |
699 | procinfo_list = pi; | |
700 | } | |
701 | else | |
702 | { | |
703 | #ifdef NEW_PROC_API | |
704 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
705 | #else | |
706 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
707 | #endif | |
708 | pi->next = parent->thread_list; | |
709 | parent->thread_list = pi; | |
710 | } | |
711 | return pi; | |
712 | } | |
c906108c | 713 | |
c3f6f71d JM |
714 | /* |
715 | * Function: close_procinfo_files | |
716 | * | |
717 | * Close all file descriptors associated with the procinfo | |
718 | */ | |
c906108c | 719 | |
c3f6f71d | 720 | static void |
fba45db2 | 721 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
722 | { |
723 | if (pi->ctl_fd > 0) | |
724 | close (pi->ctl_fd); | |
725 | #ifdef NEW_PROC_API | |
726 | if (pi->as_fd > 0) | |
727 | close (pi->as_fd); | |
728 | if (pi->status_fd > 0) | |
729 | close (pi->status_fd); | |
730 | #endif | |
731 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
732 | } | |
c906108c | 733 | |
c3f6f71d JM |
734 | /* |
735 | * Function: destroy_procinfo | |
736 | * | |
737 | * Destructor function. Close, unlink and deallocate the object. | |
738 | */ | |
c906108c | 739 | |
c3f6f71d | 740 | static void |
fba45db2 | 741 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
742 | { |
743 | procinfo *ptr; | |
744 | ||
745 | /* Step one: unlink the procinfo from its list */ | |
746 | if (pi == *list) | |
747 | *list = pi->next; | |
748 | else | |
749 | for (ptr = *list; ptr; ptr = ptr->next) | |
750 | if (ptr->next == pi) | |
751 | { | |
752 | ptr->next = pi->next; | |
753 | break; | |
754 | } | |
7a292a7a | 755 | |
c3f6f71d JM |
756 | /* Step two: close any open file descriptors */ |
757 | close_procinfo_files (pi); | |
7a292a7a | 758 | |
c3f6f71d | 759 | /* Step three: free the memory. */ |
37de36c6 KB |
760 | #ifdef DYNAMIC_SYSCALLS |
761 | free_syscalls (pi); | |
762 | #endif | |
1d5e0602 KB |
763 | xfree (pi->saved_entryset); |
764 | xfree (pi->saved_exitset); | |
b8c9b27d | 765 | xfree (pi); |
c3f6f71d | 766 | } |
c906108c | 767 | |
c3f6f71d | 768 | static void |
fba45db2 | 769 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
770 | { |
771 | procinfo *tmp; | |
c906108c | 772 | |
c3f6f71d JM |
773 | if (pi->tid != 0) /* destroy a thread procinfo */ |
774 | { | |
775 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
776 | destroy_one_procinfo (&tmp->thread_list, pi); | |
777 | } | |
778 | else /* destroy a process procinfo and all its threads */ | |
779 | { | |
780 | /* First destroy the children, if any; */ | |
781 | while (pi->thread_list != NULL) | |
782 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
783 | /* Then destroy the parent. Genocide!!! */ | |
784 | destroy_one_procinfo (&procinfo_list, pi); | |
785 | } | |
786 | } | |
c906108c | 787 | |
004527cb AC |
788 | static void |
789 | do_destroy_procinfo_cleanup (void *pi) | |
790 | { | |
791 | destroy_procinfo (pi); | |
792 | } | |
793 | ||
c3f6f71d | 794 | enum { NOKILL, KILL }; |
c906108c | 795 | |
c3f6f71d JM |
796 | /* |
797 | * Function: dead_procinfo | |
798 | * | |
799 | * To be called on a non_recoverable error for a procinfo. | |
800 | * Prints error messages, optionally sends a SIGKILL to the process, | |
801 | * then destroys the data structure. | |
802 | */ | |
c906108c | 803 | |
c3f6f71d | 804 | static void |
fba45db2 | 805 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
806 | { |
807 | char procfile[80]; | |
c906108c | 808 | |
c3f6f71d JM |
809 | if (pi->pathname) |
810 | { | |
811 | print_sys_errmsg (pi->pathname, errno); | |
812 | } | |
813 | else | |
814 | { | |
815 | sprintf (procfile, "process %d", pi->pid); | |
816 | print_sys_errmsg (procfile, errno); | |
817 | } | |
818 | if (kill_p == KILL) | |
819 | kill (pi->pid, SIGKILL); | |
c906108c | 820 | |
c3f6f71d JM |
821 | destroy_procinfo (pi); |
822 | error (msg); | |
823 | } | |
c906108c | 824 | |
37de36c6 KB |
825 | /* |
826 | * Function: sysset_t_size | |
827 | * | |
828 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
829 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
830 | * size of sysset_t isn't known until runtime. | |
831 | */ | |
832 | ||
833 | static int | |
834 | sysset_t_size (procinfo * pi) | |
835 | { | |
836 | #ifndef DYNAMIC_SYSCALLS | |
837 | return sizeof (sysset_t); | |
838 | #else | |
839 | return sizeof (sysset_t) - sizeof (uint64_t) | |
840 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
841 | / (8 * sizeof (uint64_t))); | |
842 | #endif | |
843 | } | |
844 | ||
845 | /* Function: sysset_t_alloc | |
846 | ||
847 | Allocate and (partially) initialize a sysset_t struct. */ | |
848 | ||
849 | static sysset_t * | |
850 | sysset_t_alloc (procinfo * pi) | |
851 | { | |
852 | sysset_t *ret; | |
853 | int size = sysset_t_size (pi); | |
854 | ret = xmalloc (size); | |
855 | #ifdef DYNAMIC_SYSCALLS | |
856 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
857 | / (8 * sizeof (uint64_t)); | |
858 | #endif | |
859 | return ret; | |
860 | } | |
861 | ||
862 | #ifdef DYNAMIC_SYSCALLS | |
863 | ||
864 | /* Function: load_syscalls | |
865 | ||
866 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize | |
867 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
868 | with the names. (Certain numbers may be skipped in which case the | |
869 | names for these numbers will be left as NULL.) */ | |
870 | ||
871 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
872 | #define MAX_SYSCALLS 65536 | |
873 | ||
874 | static void | |
875 | load_syscalls (procinfo *pi) | |
876 | { | |
877 | char pathname[MAX_PROC_NAME_SIZE]; | |
878 | int sysent_fd; | |
879 | prsysent_t header; | |
880 | prsyscall_t *syscalls; | |
881 | int i, size, maxcall; | |
882 | ||
883 | pi->num_syscalls = 0; | |
884 | pi->syscall_names = 0; | |
885 | ||
886 | /* Open the file descriptor for the sysent file */ | |
887 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 888 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
889 | if (sysent_fd < 0) |
890 | { | |
891 | error ("load_syscalls: Can't open /proc/%d/sysent", pi->pid); | |
892 | } | |
893 | ||
894 | size = sizeof header - sizeof (prsyscall_t); | |
895 | if (read (sysent_fd, &header, size) != size) | |
896 | { | |
897 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
898 | } | |
899 | ||
900 | if (header.pr_nsyscalls == 0) | |
901 | { | |
902 | error ("load_syscalls: /proc/%d/sysent contains no syscalls!", pi->pid); | |
903 | } | |
904 | ||
905 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
906 | syscalls = xmalloc (size); | |
907 | ||
908 | if (read (sysent_fd, syscalls, size) != size) | |
909 | { | |
910 | xfree (syscalls); | |
911 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
912 | } | |
913 | ||
914 | /* Find maximum syscall number. This may not be the same as | |
915 | pr_nsyscalls since that value refers to the number of entries | |
916 | in the table. (Also, the docs indicate that some system | |
917 | call numbers may be skipped.) */ | |
918 | ||
919 | maxcall = syscalls[0].pr_number; | |
920 | ||
921 | for (i = 1; i < header.pr_nsyscalls; i++) | |
922 | if (syscalls[i].pr_number > maxcall | |
923 | && syscalls[i].pr_nameoff > 0 | |
924 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
925 | maxcall = syscalls[i].pr_number; | |
926 | ||
927 | pi->num_syscalls = maxcall+1; | |
928 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
929 | ||
930 | for (i = 0; i < pi->num_syscalls; i++) | |
931 | pi->syscall_names[i] = NULL; | |
932 | ||
933 | /* Read the syscall names in */ | |
934 | for (i = 0; i < header.pr_nsyscalls; i++) | |
935 | { | |
936 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
937 | int nread; | |
938 | int callnum; | |
939 | ||
940 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
941 | || syscalls[i].pr_number < 0 | |
942 | || syscalls[i].pr_nameoff <= 0 | |
943 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
944 | != (off_t) syscalls[i].pr_nameoff)) | |
945 | continue; | |
946 | ||
947 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
948 | if (nread <= 0) | |
949 | continue; | |
950 | ||
951 | callnum = syscalls[i].pr_number; | |
952 | ||
953 | if (pi->syscall_names[callnum] != NULL) | |
954 | { | |
955 | /* FIXME: Generate warning */ | |
956 | continue; | |
957 | } | |
958 | ||
959 | namebuf[nread-1] = '\0'; | |
960 | size = strlen (namebuf) + 1; | |
961 | pi->syscall_names[callnum] = xmalloc (size); | |
962 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
963 | pi->syscall_names[callnum][size-1] = '\0'; | |
964 | } | |
965 | ||
966 | close (sysent_fd); | |
967 | xfree (syscalls); | |
968 | } | |
969 | ||
970 | /* Function: free_syscalls | |
971 | ||
972 | Free the space allocated for the syscall names from the procinfo | |
973 | structure. */ | |
974 | ||
975 | static void | |
976 | free_syscalls (procinfo *pi) | |
977 | { | |
978 | if (pi->syscall_names) | |
979 | { | |
980 | int i; | |
981 | ||
982 | for (i = 0; i < pi->num_syscalls; i++) | |
983 | if (pi->syscall_names[i] != NULL) | |
984 | xfree (pi->syscall_names[i]); | |
985 | ||
986 | xfree (pi->syscall_names); | |
987 | pi->syscall_names = 0; | |
988 | } | |
989 | } | |
990 | ||
991 | /* Function: find_syscall | |
992 | ||
993 | Given a name, look up (and return) the corresponding syscall number. | |
994 | If no match is found, return -1. */ | |
995 | ||
996 | static int | |
997 | find_syscall (procinfo *pi, char *name) | |
998 | { | |
999 | int i; | |
1000 | for (i = 0; i < pi->num_syscalls; i++) | |
1001 | { | |
1002 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1003 | return i; | |
1004 | } | |
1005 | return -1; | |
1006 | } | |
1007 | #endif | |
1008 | ||
c3f6f71d | 1009 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1010 | |
c3f6f71d | 1011 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1012 | |
c3f6f71d JM |
1013 | /* |
1014 | * This "module" is the interface layer between the /proc system API | |
1015 | * and the gdb target vector functions. This layer consists of | |
1016 | * access functions that encapsulate each of the basic operations | |
1017 | * that we need to use from the /proc API. | |
1018 | * | |
1019 | * The main motivation for this layer is to hide the fact that | |
1020 | * there are two very different implementations of the /proc API. | |
1021 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1022 | * functions, we do our best to hide them all in here. | |
1023 | */ | |
c906108c | 1024 | |
a14ed312 KB |
1025 | int proc_get_status (procinfo * pi); |
1026 | long proc_flags (procinfo * pi); | |
1027 | int proc_why (procinfo * pi); | |
1028 | int proc_what (procinfo * pi); | |
1029 | int proc_set_run_on_last_close (procinfo * pi); | |
1030 | int proc_unset_run_on_last_close (procinfo * pi); | |
1031 | int proc_set_inherit_on_fork (procinfo * pi); | |
1032 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1033 | int proc_set_async (procinfo * pi); | |
1034 | int proc_unset_async (procinfo * pi); | |
1035 | int proc_stop_process (procinfo * pi); | |
1036 | int proc_trace_signal (procinfo * pi, int signo); | |
1037 | int proc_ignore_signal (procinfo * pi, int signo); | |
1038 | int proc_clear_current_fault (procinfo * pi); | |
1039 | int proc_set_current_signal (procinfo * pi, int signo); | |
1040 | int proc_clear_current_signal (procinfo * pi); | |
1041 | int proc_set_gregs (procinfo * pi); | |
1042 | int proc_set_fpregs (procinfo * pi); | |
1043 | int proc_wait_for_stop (procinfo * pi); | |
1044 | int proc_run_process (procinfo * pi, int step, int signo); | |
1045 | int proc_kill (procinfo * pi, int signo); | |
1046 | int proc_parent_pid (procinfo * pi); | |
1047 | int proc_get_nthreads (procinfo * pi); | |
1048 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1049 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1050 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1051 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1052 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1053 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1054 | |
1055 | int proc_update_threads (procinfo * pi); | |
1056 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1057 | int (*func) (procinfo *, procinfo *, void *), |
1058 | void *ptr); | |
a14ed312 KB |
1059 | |
1060 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1061 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1062 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1063 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1064 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1065 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1066 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1067 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1068 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1069 | |
1070 | void proc_warn (procinfo * pi, char *func, int line); | |
1071 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1072 | |
c3f6f71d | 1073 | void |
fba45db2 | 1074 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1075 | { |
1076 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1077 | print_sys_errmsg (errmsg, errno); | |
1078 | } | |
c906108c | 1079 | |
c3f6f71d | 1080 | void |
fba45db2 | 1081 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1082 | { |
1083 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1084 | perror_with_name (errmsg); | |
1085 | } | |
c906108c | 1086 | |
c3f6f71d JM |
1087 | /* |
1088 | * Function: proc_get_status | |
1089 | * | |
1090 | * Updates the status struct in the procinfo. | |
1091 | * There is a 'valid' flag, to let other functions know when | |
1092 | * this function needs to be called (so the status is only | |
1093 | * read when it is needed). The status file descriptor is | |
1094 | * also only opened when it is needed. | |
1095 | * | |
1096 | * Return: non-zero for success, zero for failure. | |
1097 | */ | |
c906108c | 1098 | |
c3f6f71d | 1099 | int |
fba45db2 | 1100 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1101 | { |
1102 | /* Status file descriptor is opened "lazily" */ | |
1103 | if (pi->status_fd == 0 && | |
1104 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1105 | { | |
1106 | pi->status_valid = 0; | |
1107 | return 0; | |
1108 | } | |
c906108c | 1109 | |
c3f6f71d JM |
1110 | #ifdef NEW_PROC_API |
1111 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1112 | pi->status_valid = 0; /* fail */ | |
1113 | else | |
1114 | { | |
1115 | /* Sigh... I have to read a different data structure, | |
1116 | depending on whether this is a main process or an LWP. */ | |
1117 | if (pi->tid) | |
1118 | pi->status_valid = (read (pi->status_fd, | |
1119 | (char *) &pi->prstatus.pr_lwp, | |
1120 | sizeof (lwpstatus_t)) | |
1121 | == sizeof (lwpstatus_t)); | |
1122 | else | |
1123 | { | |
1124 | pi->status_valid = (read (pi->status_fd, | |
1125 | (char *) &pi->prstatus, | |
1126 | sizeof (gdb_prstatus_t)) | |
1127 | == sizeof (gdb_prstatus_t)); | |
1128 | #if 0 /*def UNIXWARE*/ | |
1129 | if (pi->status_valid && | |
1130 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1131 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1132 | /* Unixware peculiarity -- read the damn thing again! */ | |
1133 | pi->status_valid = (read (pi->status_fd, | |
1134 | (char *) &pi->prstatus, | |
1135 | sizeof (gdb_prstatus_t)) | |
1136 | == sizeof (gdb_prstatus_t)); | |
1137 | #endif /* UNIXWARE */ | |
1138 | } | |
1139 | } | |
1140 | #else /* ioctl method */ | |
1141 | #ifdef PIOCTSTATUS /* osf */ | |
1142 | if (pi->tid == 0) /* main process */ | |
1143 | { | |
1144 | /* Just read the danged status. Now isn't that simple? */ | |
1145 | pi->status_valid = | |
1146 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1147 | } | |
1148 | else | |
1149 | { | |
1150 | int win; | |
1151 | struct { | |
1152 | long pr_count; | |
1153 | tid_t pr_error_thread; | |
1154 | struct prstatus status; | |
1155 | } thread_status; | |
1156 | ||
1157 | thread_status.pr_count = 1; | |
1158 | thread_status.status.pr_tid = pi->tid; | |
1159 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1160 | if (win) | |
1161 | { | |
1162 | memcpy (&pi->prstatus, &thread_status.status, | |
1163 | sizeof (pi->prstatus)); | |
1164 | pi->status_valid = 1; | |
1165 | } | |
1166 | } | |
1167 | #else | |
1168 | /* Just read the danged status. Now isn't that simple? */ | |
1169 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1170 | #endif | |
1171 | #endif | |
c906108c | 1172 | |
c3f6f71d JM |
1173 | if (pi->status_valid) |
1174 | { | |
1175 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1176 | proc_why (pi), | |
1177 | proc_what (pi), | |
1178 | proc_get_current_thread (pi)); | |
1179 | } | |
c906108c | 1180 | |
c3f6f71d JM |
1181 | /* The status struct includes general regs, so mark them valid too */ |
1182 | pi->gregs_valid = pi->status_valid; | |
1183 | #ifdef NEW_PROC_API | |
1184 | /* In the read/write multiple-fd model, | |
1185 | the status struct includes the fp regs too, so mark them valid too */ | |
1186 | pi->fpregs_valid = pi->status_valid; | |
1187 | #endif | |
1188 | return pi->status_valid; /* True if success, false if failure. */ | |
1189 | } | |
c906108c | 1190 | |
c3f6f71d JM |
1191 | /* |
1192 | * Function: proc_flags | |
1193 | * | |
1194 | * returns the process flags (pr_flags field). | |
1195 | */ | |
1196 | ||
1197 | long | |
fba45db2 | 1198 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1199 | { |
1200 | if (!pi->status_valid) | |
1201 | if (!proc_get_status (pi)) | |
1202 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1203 | |
c3f6f71d | 1204 | #ifdef NEW_PROC_API |
0d06e24b JM |
1205 | # ifdef UNIXWARE |
1206 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1207 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1208 | The two sets of flags don't overlap. */ | |
1209 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1210 | # else | |
c3f6f71d | 1211 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1212 | # endif |
c3f6f71d JM |
1213 | #else |
1214 | return pi->prstatus.pr_flags; | |
1215 | #endif | |
1216 | } | |
c906108c | 1217 | |
c3f6f71d JM |
1218 | /* |
1219 | * Function: proc_why | |
1220 | * | |
1221 | * returns the pr_why field (why the process stopped). | |
1222 | */ | |
c906108c | 1223 | |
c3f6f71d | 1224 | int |
fba45db2 | 1225 | proc_why (procinfo *pi) |
c3f6f71d JM |
1226 | { |
1227 | if (!pi->status_valid) | |
1228 | if (!proc_get_status (pi)) | |
1229 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1230 | |
c3f6f71d JM |
1231 | #ifdef NEW_PROC_API |
1232 | return pi->prstatus.pr_lwp.pr_why; | |
1233 | #else | |
1234 | return pi->prstatus.pr_why; | |
1235 | #endif | |
1236 | } | |
c906108c | 1237 | |
c3f6f71d JM |
1238 | /* |
1239 | * Function: proc_what | |
1240 | * | |
1241 | * returns the pr_what field (details of why the process stopped). | |
1242 | */ | |
c906108c | 1243 | |
c3f6f71d | 1244 | int |
fba45db2 | 1245 | proc_what (procinfo *pi) |
c3f6f71d JM |
1246 | { |
1247 | if (!pi->status_valid) | |
1248 | if (!proc_get_status (pi)) | |
1249 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1250 | |
c3f6f71d JM |
1251 | #ifdef NEW_PROC_API |
1252 | return pi->prstatus.pr_lwp.pr_what; | |
1253 | #else | |
1254 | return pi->prstatus.pr_what; | |
c906108c | 1255 | #endif |
c3f6f71d | 1256 | } |
c906108c | 1257 | |
c3f6f71d JM |
1258 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1259 | /* | |
1260 | * Function: proc_nsysarg | |
1261 | * | |
1262 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1263 | */ | |
1264 | ||
1265 | int | |
fba45db2 | 1266 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1267 | { |
1268 | if (!pi->status_valid) | |
1269 | if (!proc_get_status (pi)) | |
1270 | return 0; | |
1271 | ||
1272 | #ifdef NEW_PROC_API | |
1273 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1274 | #else | |
1275 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1276 | #endif |
c3f6f71d | 1277 | } |
c906108c | 1278 | |
c3f6f71d JM |
1279 | /* |
1280 | * Function: proc_sysargs | |
1281 | * | |
1282 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1283 | */ | |
c906108c | 1284 | |
c3f6f71d | 1285 | long * |
fba45db2 | 1286 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1287 | { |
1288 | if (!pi->status_valid) | |
1289 | if (!proc_get_status (pi)) | |
1290 | return NULL; | |
1291 | ||
1292 | #ifdef NEW_PROC_API | |
1293 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1294 | #else | |
1295 | return (long *) &pi->prstatus.pr_sysarg; | |
1296 | #endif | |
1297 | } | |
c906108c | 1298 | |
c3f6f71d JM |
1299 | /* |
1300 | * Function: proc_syscall | |
1301 | * | |
1302 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1303 | */ | |
c906108c | 1304 | |
c3f6f71d | 1305 | int |
fba45db2 | 1306 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1307 | { |
1308 | if (!pi->status_valid) | |
1309 | if (!proc_get_status (pi)) | |
1310 | return 0; | |
1311 | ||
1312 | #ifdef NEW_PROC_API | |
1313 | return pi->prstatus.pr_lwp.pr_syscall; | |
1314 | #else | |
1315 | return pi->prstatus.pr_syscall; | |
1316 | #endif | |
1317 | } | |
1318 | #endif /* PIOCSSPCACT */ | |
c906108c | 1319 | |
c3f6f71d JM |
1320 | /* |
1321 | * Function: proc_cursig: | |
1322 | * | |
1323 | * returns the pr_cursig field (current signal). | |
1324 | */ | |
c906108c | 1325 | |
c3f6f71d JM |
1326 | long |
1327 | proc_cursig (struct procinfo *pi) | |
1328 | { | |
1329 | if (!pi->status_valid) | |
1330 | if (!proc_get_status (pi)) | |
1331 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1332 | |
c3f6f71d JM |
1333 | #ifdef NEW_PROC_API |
1334 | return pi->prstatus.pr_lwp.pr_cursig; | |
1335 | #else | |
1336 | return pi->prstatus.pr_cursig; | |
1337 | #endif | |
1338 | } | |
c906108c | 1339 | |
c3f6f71d | 1340 | /* |
0d06e24b | 1341 | * Function: proc_modify_flag |
c3f6f71d JM |
1342 | * |
1343 | * === I appologize for the messiness of this function. | |
1344 | * === This is an area where the different versions of | |
1345 | * === /proc are more inconsistent than usual. MVS | |
1346 | * | |
1347 | * Set or reset any of the following process flags: | |
1348 | * PR_FORK -- forked child will inherit trace flags | |
1349 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1350 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1351 | * PR_ASYNC -- LWP's get to run/stop independently. |
1352 | * | |
1353 | * There are three methods for doing this function: | |
1354 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1355 | * [Sol6, Sol7, UW] | |
1356 | * 2) Middle: PIOCSET/PIOCRESET | |
1357 | * [Irix, Sol5] | |
1358 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1359 | * [OSF, Sol5] | |
1360 | * | |
1361 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1362 | * Note: OSF does not define PR_KLC. |
1363 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1364 | * |
1365 | * Arguments: | |
1366 | * pi -- the procinfo | |
1367 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1368 | * mode -- 1 for set, 0 for reset. | |
1369 | * | |
1370 | * Returns non-zero for success, zero for failure. | |
1371 | */ | |
c906108c | 1372 | |
c3f6f71d | 1373 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1374 | |
c3f6f71d | 1375 | static int |
fba45db2 | 1376 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1377 | { |
1378 | long win = 0; /* default to fail */ | |
1379 | ||
1380 | /* | |
1381 | * These operations affect the process as a whole, and applying | |
1382 | * them to an individual LWP has the same meaning as applying them | |
1383 | * to the main process. Therefore, if we're ever called with a | |
1384 | * pointer to an LWP's procinfo, let's substitute the process's | |
1385 | * procinfo and avoid opening the LWP's file descriptor | |
1386 | * unnecessarily. | |
1387 | */ | |
1388 | ||
1389 | if (pi->pid != 0) | |
1390 | pi = find_procinfo_or_die (pi->pid, 0); | |
1391 | ||
1392 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1393 | /* First normalize the PCUNSET/PCRESET command opcode | |
1394 | (which for no obvious reason has a different definition | |
1395 | from one operating system to the next...) */ | |
1396 | #ifdef PCUNSET | |
1397 | #define GDBRESET PCUNSET | |
37de36c6 | 1398 | #else |
c3f6f71d JM |
1399 | #ifdef PCRESET |
1400 | #define GDBRESET PCRESET | |
37de36c6 | 1401 | #endif |
c906108c | 1402 | #endif |
c3f6f71d | 1403 | { |
37de36c6 | 1404 | procfs_ctl_t arg[2]; |
c906108c | 1405 | |
c3f6f71d JM |
1406 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1407 | arg[0] = PCSET; | |
1408 | else /* Reset the flag */ | |
1409 | arg[0] = GDBRESET; | |
c5aa993b | 1410 | |
c3f6f71d JM |
1411 | arg[1] = flag; |
1412 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1413 | } | |
1414 | #else | |
1415 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1416 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1417 | { | |
1418 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1419 | } | |
1420 | else /* Reset the flag */ | |
1421 | { | |
1422 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1423 | } | |
c906108c | 1424 | |
c3f6f71d JM |
1425 | #else |
1426 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1427 | switch (flag) { | |
1428 | case PR_RLC: | |
1429 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1430 | { | |
1431 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1432 | } | |
1433 | else /* Clear run-on-last-close */ | |
1434 | { | |
1435 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1436 | } | |
1437 | break; | |
1438 | case PR_FORK: | |
1439 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1440 | { | |
1441 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1442 | } | |
1443 | else /* Clear inherit-on-fork */ | |
1444 | { | |
1445 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1446 | } | |
1447 | break; | |
1448 | default: | |
1449 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1450 | break; | |
1451 | } | |
1452 | #endif | |
1453 | #endif | |
1454 | #endif | |
1455 | #undef GDBRESET | |
1456 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1457 | pi->status_valid = 0; | |
c906108c | 1458 | |
c3f6f71d JM |
1459 | if (!win) |
1460 | warning ("procfs: modify_flag failed to turn %s %s", | |
1461 | flag == PR_FORK ? "PR_FORK" : | |
1462 | flag == PR_RLC ? "PR_RLC" : | |
1463 | #ifdef PR_ASYNC | |
1464 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1465 | #endif |
1466 | #ifdef PR_KLC | |
1467 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1468 | #endif |
1469 | "<unknown flag>", | |
1470 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1471 | |
c3f6f71d JM |
1472 | return win; |
1473 | } | |
c906108c | 1474 | |
c3f6f71d JM |
1475 | /* |
1476 | * Function: proc_set_run_on_last_close | |
1477 | * | |
1478 | * Set the run_on_last_close flag. | |
1479 | * Process with all threads will become runnable | |
1480 | * when debugger closes all /proc fds. | |
1481 | * | |
1482 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1483 | */ |
1484 | ||
c3f6f71d | 1485 | int |
fba45db2 | 1486 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1487 | { |
c3f6f71d JM |
1488 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1489 | } | |
c906108c | 1490 | |
c3f6f71d JM |
1491 | /* |
1492 | * Function: proc_unset_run_on_last_close | |
1493 | * | |
1494 | * Reset the run_on_last_close flag. | |
1495 | * Process will NOT become runnable | |
1496 | * when debugger closes its file handles. | |
1497 | * | |
1498 | * Returns non-zero for success, zero for failure. | |
1499 | */ | |
c906108c | 1500 | |
c3f6f71d | 1501 | int |
fba45db2 | 1502 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1503 | { |
1504 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1505 | } |
1506 | ||
0d06e24b JM |
1507 | #ifdef PR_KLC |
1508 | /* | |
1509 | * Function: proc_set_kill_on_last_close | |
1510 | * | |
1511 | * Set the kill_on_last_close flag. | |
1512 | * Process with all threads will be killed when debugger | |
1513 | * closes all /proc fds (or debugger exits or dies). | |
1514 | * | |
1515 | * Returns non-zero for success, zero for failure. | |
1516 | */ | |
1517 | ||
1518 | int | |
fba45db2 | 1519 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1520 | { |
1521 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1522 | } | |
1523 | ||
1524 | /* | |
1525 | * Function: proc_unset_kill_on_last_close | |
1526 | * | |
1527 | * Reset the kill_on_last_close flag. | |
1528 | * Process will NOT be killed when debugger | |
1529 | * closes its file handles (or exits or dies). | |
1530 | * | |
1531 | * Returns non-zero for success, zero for failure. | |
1532 | */ | |
1533 | ||
1534 | int | |
fba45db2 | 1535 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1536 | { |
1537 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1538 | } | |
1539 | #endif /* PR_KLC */ | |
1540 | ||
c906108c | 1541 | /* |
c3f6f71d JM |
1542 | * Function: proc_set_inherit_on_fork |
1543 | * | |
1544 | * Set inherit_on_fork flag. | |
1545 | * If the process forks a child while we are registered for events | |
1546 | * in the parent, then we will also recieve events from the child. | |
1547 | * | |
1548 | * Returns non-zero for success, zero for failure. | |
1549 | */ | |
c906108c | 1550 | |
c3f6f71d | 1551 | int |
fba45db2 | 1552 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1553 | { |
1554 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1555 | } | |
c5aa993b | 1556 | |
c3f6f71d JM |
1557 | /* |
1558 | * Function: proc_unset_inherit_on_fork | |
1559 | * | |
1560 | * Reset inherit_on_fork flag. | |
1561 | * If the process forks a child while we are registered for events | |
1562 | * in the parent, then we will NOT recieve events from the child. | |
1563 | * | |
1564 | * Returns non-zero for success, zero for failure. | |
1565 | */ | |
c906108c | 1566 | |
c3f6f71d | 1567 | int |
fba45db2 | 1568 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1569 | { |
1570 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1571 | } | |
c906108c | 1572 | |
c3f6f71d JM |
1573 | #ifdef PR_ASYNC |
1574 | /* | |
1575 | * Function: proc_set_async | |
1576 | * | |
1577 | * Set PR_ASYNC flag. | |
1578 | * If one LWP stops because of a debug event (signal etc.), | |
1579 | * the remaining LWPs will continue to run. | |
1580 | * | |
1581 | * Returns non-zero for success, zero for failure. | |
1582 | */ | |
c906108c | 1583 | |
c3f6f71d | 1584 | int |
fba45db2 | 1585 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1586 | { |
1587 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1588 | } | |
c906108c | 1589 | |
c3f6f71d JM |
1590 | /* |
1591 | * Function: proc_unset_async | |
1592 | * | |
1593 | * Reset PR_ASYNC flag. | |
1594 | * If one LWP stops because of a debug event (signal etc.), | |
1595 | * then all other LWPs will stop as well. | |
1596 | * | |
1597 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1598 | */ |
1599 | ||
c3f6f71d | 1600 | int |
fba45db2 | 1601 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1602 | { |
1603 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1604 | } | |
1605 | #endif /* PR_ASYNC */ | |
c906108c SS |
1606 | |
1607 | /* | |
c3f6f71d JM |
1608 | * Function: proc_stop_process |
1609 | * | |
1610 | * Request the process/LWP to stop. Does not wait. | |
1611 | * Returns non-zero for success, zero for failure. | |
1612 | */ | |
c906108c | 1613 | |
c3f6f71d | 1614 | int |
fba45db2 | 1615 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1616 | { |
1617 | int win; | |
c906108c | 1618 | |
c3f6f71d JM |
1619 | /* |
1620 | * We might conceivably apply this operation to an LWP, and | |
1621 | * the LWP's ctl file descriptor might not be open. | |
1622 | */ | |
c906108c | 1623 | |
c3f6f71d JM |
1624 | if (pi->ctl_fd == 0 && |
1625 | open_procinfo_files (pi, FD_CTL) == 0) | |
1626 | return 0; | |
1627 | else | |
1628 | { | |
1629 | #ifdef NEW_PROC_API | |
37de36c6 | 1630 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1631 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1632 | #else /* ioctl method */ | |
1633 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1634 | /* Note: the call also reads the prstatus. */ | |
1635 | if (win) | |
1636 | { | |
1637 | pi->status_valid = 1; | |
1638 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1639 | proc_why (pi), | |
1640 | proc_what (pi), | |
1641 | proc_get_current_thread (pi)); | |
1642 | } | |
1643 | #endif | |
1644 | } | |
c906108c | 1645 | |
c3f6f71d JM |
1646 | return win; |
1647 | } | |
c5aa993b | 1648 | |
c3f6f71d JM |
1649 | /* |
1650 | * Function: proc_wait_for_stop | |
1651 | * | |
1652 | * Wait for the process or LWP to stop (block until it does). | |
1653 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1654 | */ |
1655 | ||
c3f6f71d | 1656 | int |
fba45db2 | 1657 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1658 | { |
c3f6f71d JM |
1659 | int win; |
1660 | ||
1661 | /* | |
1662 | * We should never have to apply this operation to any procinfo | |
1663 | * except the one for the main process. If that ever changes | |
1664 | * for any reason, then take out the following clause and | |
1665 | * replace it with one that makes sure the ctl_fd is open. | |
1666 | */ | |
1667 | ||
1668 | if (pi->tid != 0) | |
1669 | pi = find_procinfo_or_die (pi->pid, 0); | |
1670 | ||
1671 | #ifdef NEW_PROC_API | |
1672 | { | |
37de36c6 | 1673 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1674 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1675 | /* We been runnin' and we stopped -- need to update status. */ | |
1676 | pi->status_valid = 0; | |
1677 | } | |
1678 | #else /* ioctl method */ | |
1679 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1680 | /* Above call also refreshes the prstatus. */ | |
1681 | if (win) | |
1682 | { | |
1683 | pi->status_valid = 1; | |
1684 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1685 | proc_why (pi), | |
1686 | proc_what (pi), | |
1687 | proc_get_current_thread (pi)); | |
1688 | } | |
c906108c SS |
1689 | #endif |
1690 | ||
c3f6f71d | 1691 | return win; |
c906108c SS |
1692 | } |
1693 | ||
1694 | /* | |
c3f6f71d JM |
1695 | * Function: proc_run_process |
1696 | * | |
1697 | * Make the process or LWP runnable. | |
1698 | * Options (not all are implemented): | |
1699 | * - single-step | |
1700 | * - clear current fault | |
1701 | * - clear current signal | |
1702 | * - abort the current system call | |
1703 | * - stop as soon as finished with system call | |
1704 | * - (ioctl): set traced signal set | |
1705 | * - (ioctl): set held signal set | |
1706 | * - (ioctl): set traced fault set | |
1707 | * - (ioctl): set start pc (vaddr) | |
1708 | * Always clear the current fault. | |
1709 | * Clear the current signal if 'signo' is zero. | |
1710 | * | |
1711 | * Arguments: | |
1712 | * pi the process or LWP to operate on. | |
1713 | * step if true, set the process or LWP to trap after one instr. | |
1714 | * signo if zero, clear the current signal if any. | |
1715 | * if non-zero, set the current signal to this one. | |
1716 | * | |
1717 | * Returns non-zero for success, zero for failure. | |
1718 | */ | |
1719 | ||
1720 | int | |
fba45db2 | 1721 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1722 | { |
1723 | int win; | |
1724 | int runflags; | |
1725 | ||
1726 | /* | |
1727 | * We will probably have to apply this operation to individual threads, | |
1728 | * so make sure the control file descriptor is open. | |
1729 | */ | |
1730 | ||
1731 | if (pi->ctl_fd == 0 && | |
1732 | open_procinfo_files (pi, FD_CTL) == 0) | |
1733 | { | |
1734 | return 0; | |
1735 | } | |
c906108c | 1736 | |
c3f6f71d JM |
1737 | runflags = PRCFAULT; /* always clear current fault */ |
1738 | if (step) | |
1739 | runflags |= PRSTEP; | |
1740 | if (signo == 0) | |
1741 | runflags |= PRCSIG; | |
1742 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1743 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1744 | |
c3f6f71d JM |
1745 | #ifdef NEW_PROC_API |
1746 | { | |
37de36c6 | 1747 | procfs_ctl_t cmd[2]; |
c906108c | 1748 | |
c3f6f71d JM |
1749 | cmd[0] = PCRUN; |
1750 | cmd[1] = runflags; | |
1751 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1752 | } | |
1753 | #else /* ioctl method */ | |
1754 | { | |
1755 | prrun_t prrun; | |
c906108c | 1756 | |
c3f6f71d JM |
1757 | memset (&prrun, 0, sizeof (prrun)); |
1758 | prrun.pr_flags = runflags; | |
1759 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1760 | } | |
1761 | #endif | |
c906108c | 1762 | |
c3f6f71d JM |
1763 | return win; |
1764 | } | |
c906108c | 1765 | |
c3f6f71d JM |
1766 | /* |
1767 | * Function: proc_set_traced_signals | |
1768 | * | |
1769 | * Register to trace signals in the process or LWP. | |
1770 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1771 | */ |
1772 | ||
c3f6f71d | 1773 | int |
37de36c6 | 1774 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1775 | { |
c3f6f71d JM |
1776 | int win; |
1777 | ||
1778 | /* | |
1779 | * We should never have to apply this operation to any procinfo | |
1780 | * except the one for the main process. If that ever changes | |
1781 | * for any reason, then take out the following clause and | |
1782 | * replace it with one that makes sure the ctl_fd is open. | |
1783 | */ | |
1784 | ||
1785 | if (pi->tid != 0) | |
1786 | pi = find_procinfo_or_die (pi->pid, 0); | |
1787 | ||
1788 | #ifdef NEW_PROC_API | |
1789 | { | |
1790 | struct { | |
37de36c6 | 1791 | procfs_ctl_t cmd; |
c3f6f71d | 1792 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1793 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1794 | } arg; |
c906108c | 1795 | |
c3f6f71d | 1796 | arg.cmd = PCSTRACE; |
37de36c6 | 1797 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1798 | |
c3f6f71d JM |
1799 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1800 | } | |
1801 | #else /* ioctl method */ | |
1802 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1803 | #endif | |
1804 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1805 | pi->status_valid = 0; | |
c906108c | 1806 | |
c3f6f71d JM |
1807 | if (!win) |
1808 | warning ("procfs: set_traced_signals failed"); | |
1809 | return win; | |
c906108c SS |
1810 | } |
1811 | ||
1812 | /* | |
c3f6f71d JM |
1813 | * Function: proc_set_traced_faults |
1814 | * | |
1815 | * Register to trace hardware faults in the process or LWP. | |
1816 | * Returns non-zero for success, zero for failure. | |
1817 | */ | |
c906108c | 1818 | |
c3f6f71d | 1819 | int |
fba45db2 | 1820 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1821 | { |
1822 | int win; | |
1823 | ||
1824 | /* | |
1825 | * We should never have to apply this operation to any procinfo | |
1826 | * except the one for the main process. If that ever changes | |
1827 | * for any reason, then take out the following clause and | |
1828 | * replace it with one that makes sure the ctl_fd is open. | |
1829 | */ | |
1830 | ||
1831 | if (pi->tid != 0) | |
1832 | pi = find_procinfo_or_die (pi->pid, 0); | |
1833 | ||
1834 | #ifdef NEW_PROC_API | |
1835 | { | |
1836 | struct { | |
37de36c6 | 1837 | procfs_ctl_t cmd; |
c3f6f71d JM |
1838 | /* Use char array to avoid alignment issues. */ |
1839 | char fltset[sizeof (fltset_t)]; | |
1840 | } arg; | |
c906108c | 1841 | |
c3f6f71d JM |
1842 | arg.cmd = PCSFAULT; |
1843 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1844 | |
c3f6f71d JM |
1845 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1846 | } | |
1847 | #else /* ioctl method */ | |
1848 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1849 | #endif | |
1850 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1851 | pi->status_valid = 0; | |
c906108c | 1852 | |
c3f6f71d JM |
1853 | return win; |
1854 | } | |
c5aa993b | 1855 | |
c3f6f71d JM |
1856 | /* |
1857 | * Function: proc_set_traced_sysentry | |
1858 | * | |
1859 | * Register to trace entry to system calls in the process or LWP. | |
1860 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1861 | */ |
1862 | ||
c3f6f71d | 1863 | int |
fba45db2 | 1864 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1865 | { |
c3f6f71d JM |
1866 | int win; |
1867 | ||
1868 | /* | |
1869 | * We should never have to apply this operation to any procinfo | |
1870 | * except the one for the main process. If that ever changes | |
1871 | * for any reason, then take out the following clause and | |
1872 | * replace it with one that makes sure the ctl_fd is open. | |
1873 | */ | |
1874 | ||
1875 | if (pi->tid != 0) | |
1876 | pi = find_procinfo_or_die (pi->pid, 0); | |
1877 | ||
1878 | #ifdef NEW_PROC_API | |
1879 | { | |
37de36c6 KB |
1880 | struct gdb_proc_ctl_pcsentry { |
1881 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1882 | /* Use char array to avoid alignment issues. */ |
1883 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1884 | } *argp; |
1885 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1886 | - sizeof (sysset_t) | |
1887 | + sysset_t_size (pi); | |
c3f6f71d | 1888 | |
37de36c6 | 1889 | argp = xmalloc (argp_size); |
c3f6f71d | 1890 | |
37de36c6 KB |
1891 | argp->cmd = PCSENTRY; |
1892 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1893 | ||
1894 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1895 | xfree (argp); | |
c3f6f71d JM |
1896 | } |
1897 | #else /* ioctl method */ | |
1898 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1899 | #endif | |
1900 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1901 | pi->status_valid = 0; | |
1902 | ||
1903 | return win; | |
c906108c SS |
1904 | } |
1905 | ||
1906 | /* | |
c3f6f71d JM |
1907 | * Function: proc_set_traced_sysexit |
1908 | * | |
1909 | * Register to trace exit from system calls in the process or LWP. | |
1910 | * Returns non-zero for success, zero for failure. | |
1911 | */ | |
c906108c | 1912 | |
c3f6f71d | 1913 | int |
fba45db2 | 1914 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1915 | { |
1916 | int win; | |
1917 | ||
1918 | /* | |
1919 | * We should never have to apply this operation to any procinfo | |
1920 | * except the one for the main process. If that ever changes | |
1921 | * for any reason, then take out the following clause and | |
1922 | * replace it with one that makes sure the ctl_fd is open. | |
1923 | */ | |
1924 | ||
1925 | if (pi->tid != 0) | |
1926 | pi = find_procinfo_or_die (pi->pid, 0); | |
1927 | ||
1928 | #ifdef NEW_PROC_API | |
1929 | { | |
37de36c6 KB |
1930 | struct gdb_proc_ctl_pcsexit { |
1931 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1932 | /* Use char array to avoid alignment issues. */ |
1933 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1934 | } *argp; |
1935 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1936 | - sizeof (sysset_t) | |
1937 | + sysset_t_size (pi); | |
c906108c | 1938 | |
37de36c6 | 1939 | argp = xmalloc (argp_size); |
c906108c | 1940 | |
37de36c6 KB |
1941 | argp->cmd = PCSEXIT; |
1942 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1943 | ||
1944 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1945 | xfree (argp); | |
c3f6f71d JM |
1946 | } |
1947 | #else /* ioctl method */ | |
1948 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1949 | #endif | |
1950 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1951 | pi->status_valid = 0; | |
c906108c | 1952 | |
c3f6f71d JM |
1953 | return win; |
1954 | } | |
c906108c | 1955 | |
c3f6f71d JM |
1956 | /* |
1957 | * Function: proc_set_held_signals | |
1958 | * | |
1959 | * Specify the set of blocked / held signals in the process or LWP. | |
1960 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1961 | */ |
1962 | ||
c3f6f71d | 1963 | int |
37de36c6 | 1964 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1965 | { |
c3f6f71d JM |
1966 | int win; |
1967 | ||
1968 | /* | |
1969 | * We should never have to apply this operation to any procinfo | |
1970 | * except the one for the main process. If that ever changes | |
1971 | * for any reason, then take out the following clause and | |
1972 | * replace it with one that makes sure the ctl_fd is open. | |
1973 | */ | |
1974 | ||
1975 | if (pi->tid != 0) | |
1976 | pi = find_procinfo_or_die (pi->pid, 0); | |
1977 | ||
1978 | #ifdef NEW_PROC_API | |
1979 | { | |
1980 | struct { | |
37de36c6 | 1981 | procfs_ctl_t cmd; |
c3f6f71d | 1982 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1983 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1984 | } arg; |
1985 | ||
1986 | arg.cmd = PCSHOLD; | |
37de36c6 | 1987 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1988 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1989 | } | |
c906108c | 1990 | #else |
c3f6f71d | 1991 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1992 | #endif |
c3f6f71d JM |
1993 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1994 | pi->status_valid = 0; | |
1995 | ||
1996 | return win; | |
c906108c SS |
1997 | } |
1998 | ||
1999 | /* | |
c3f6f71d JM |
2000 | * Function: proc_get_pending_signals |
2001 | * | |
2002 | * returns the set of signals that are pending in the process or LWP. | |
2003 | * Will also copy the sigset if 'save' is non-zero. | |
2004 | */ | |
c906108c | 2005 | |
37de36c6 KB |
2006 | gdb_sigset_t * |
2007 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 2008 | { |
37de36c6 | 2009 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2010 | |
2011 | /* | |
2012 | * We should never have to apply this operation to any procinfo | |
2013 | * except the one for the main process. If that ever changes | |
2014 | * for any reason, then take out the following clause and | |
2015 | * replace it with one that makes sure the ctl_fd is open. | |
2016 | */ | |
2017 | ||
2018 | if (pi->tid != 0) | |
2019 | pi = find_procinfo_or_die (pi->pid, 0); | |
2020 | ||
2021 | if (!pi->status_valid) | |
2022 | if (!proc_get_status (pi)) | |
2023 | return NULL; | |
2024 | ||
2025 | #ifdef NEW_PROC_API | |
2026 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2027 | #else | |
2028 | ret = &pi->prstatus.pr_sigpend; | |
2029 | #endif | |
2030 | if (save && ret) | |
37de36c6 | 2031 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2032 | |
c3f6f71d JM |
2033 | return ret; |
2034 | } | |
c906108c | 2035 | |
c3f6f71d JM |
2036 | /* |
2037 | * Function: proc_get_signal_actions | |
2038 | * | |
2039 | * returns the set of signal actions. | |
2040 | * Will also copy the sigactionset if 'save' is non-zero. | |
2041 | */ | |
c906108c | 2042 | |
37de36c6 KB |
2043 | gdb_sigaction_t * |
2044 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2045 | { |
37de36c6 | 2046 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2047 | |
2048 | /* | |
2049 | * We should never have to apply this operation to any procinfo | |
2050 | * except the one for the main process. If that ever changes | |
2051 | * for any reason, then take out the following clause and | |
2052 | * replace it with one that makes sure the ctl_fd is open. | |
2053 | */ | |
2054 | ||
2055 | if (pi->tid != 0) | |
2056 | pi = find_procinfo_or_die (pi->pid, 0); | |
2057 | ||
2058 | if (!pi->status_valid) | |
2059 | if (!proc_get_status (pi)) | |
2060 | return NULL; | |
2061 | ||
2062 | #ifdef NEW_PROC_API | |
2063 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2064 | #else | |
2065 | ret = &pi->prstatus.pr_action; | |
2066 | #endif | |
2067 | if (save && ret) | |
37de36c6 | 2068 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2069 | |
c3f6f71d JM |
2070 | return ret; |
2071 | } | |
c5aa993b | 2072 | |
c3f6f71d JM |
2073 | /* |
2074 | * Function: proc_get_held_signals | |
2075 | * | |
2076 | * returns the set of signals that are held / blocked. | |
2077 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2078 | */ |
2079 | ||
37de36c6 KB |
2080 | gdb_sigset_t * |
2081 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2082 | { |
37de36c6 | 2083 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2084 | |
2085 | /* | |
2086 | * We should never have to apply this operation to any procinfo | |
2087 | * except the one for the main process. If that ever changes | |
2088 | * for any reason, then take out the following clause and | |
2089 | * replace it with one that makes sure the ctl_fd is open. | |
2090 | */ | |
2091 | ||
2092 | if (pi->tid != 0) | |
2093 | pi = find_procinfo_or_die (pi->pid, 0); | |
2094 | ||
2095 | #ifdef NEW_PROC_API | |
2096 | if (!pi->status_valid) | |
2097 | if (!proc_get_status (pi)) | |
2098 | return NULL; | |
2099 | ||
2100 | #ifdef UNIXWARE | |
2101 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2102 | #else |
c3f6f71d JM |
2103 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2104 | #endif /* UNIXWARE */ | |
2105 | #else /* not NEW_PROC_API */ | |
2106 | { | |
37de36c6 | 2107 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2108 | |
2109 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2110 | ret = &sigheld; | |
2111 | } | |
2112 | #endif /* NEW_PROC_API */ | |
2113 | if (save && ret) | |
37de36c6 | 2114 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2115 | |
2116 | return ret; | |
c906108c SS |
2117 | } |
2118 | ||
c3f6f71d JM |
2119 | /* |
2120 | * Function: proc_get_traced_signals | |
2121 | * | |
2122 | * returns the set of signals that are traced / debugged. | |
2123 | * Will also copy the sigset if 'save' is non-zero. | |
2124 | */ | |
2125 | ||
37de36c6 KB |
2126 | gdb_sigset_t * |
2127 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2128 | { |
37de36c6 | 2129 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2130 | |
2131 | /* | |
2132 | * We should never have to apply this operation to any procinfo | |
2133 | * except the one for the main process. If that ever changes | |
2134 | * for any reason, then take out the following clause and | |
2135 | * replace it with one that makes sure the ctl_fd is open. | |
2136 | */ | |
2137 | ||
2138 | if (pi->tid != 0) | |
2139 | pi = find_procinfo_or_die (pi->pid, 0); | |
2140 | ||
2141 | #ifdef NEW_PROC_API | |
2142 | if (!pi->status_valid) | |
2143 | if (!proc_get_status (pi)) | |
2144 | return NULL; | |
2145 | ||
2146 | ret = &pi->prstatus.pr_sigtrace; | |
2147 | #else | |
2148 | { | |
37de36c6 | 2149 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2150 | |
2151 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2152 | ret = &sigtrace; | |
2153 | } | |
c906108c | 2154 | #endif |
c3f6f71d | 2155 | if (save && ret) |
37de36c6 | 2156 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2157 | |
c3f6f71d JM |
2158 | return ret; |
2159 | } | |
c906108c | 2160 | |
c3f6f71d JM |
2161 | /* |
2162 | * Function: proc_trace_signal | |
2163 | * | |
2164 | * Add 'signo' to the set of signals that are traced. | |
2165 | * Returns non-zero for success, zero for failure. | |
2166 | */ | |
c906108c | 2167 | |
c3f6f71d | 2168 | int |
fba45db2 | 2169 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2170 | { |
37de36c6 | 2171 | gdb_sigset_t temp; |
c3f6f71d JM |
2172 | |
2173 | /* | |
2174 | * We should never have to apply this operation to any procinfo | |
2175 | * except the one for the main process. If that ever changes | |
2176 | * for any reason, then take out the following clause and | |
2177 | * replace it with one that makes sure the ctl_fd is open. | |
2178 | */ | |
2179 | ||
2180 | if (pi->tid != 0) | |
2181 | pi = find_procinfo_or_die (pi->pid, 0); | |
2182 | ||
2183 | if (pi) | |
c906108c | 2184 | { |
c3f6f71d | 2185 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2186 | { |
c3f6f71d JM |
2187 | praddset (&temp, signo); |
2188 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
2189 | } |
2190 | } | |
c5aa993b | 2191 | |
c3f6f71d JM |
2192 | return 0; /* failure */ |
2193 | } | |
c906108c | 2194 | |
c3f6f71d JM |
2195 | /* |
2196 | * Function: proc_ignore_signal | |
2197 | * | |
2198 | * Remove 'signo' from the set of signals that are traced. | |
2199 | * Returns non-zero for success, zero for failure. | |
2200 | */ | |
c906108c | 2201 | |
c3f6f71d | 2202 | int |
fba45db2 | 2203 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2204 | { |
37de36c6 | 2205 | gdb_sigset_t temp; |
c3f6f71d JM |
2206 | |
2207 | /* | |
2208 | * We should never have to apply this operation to any procinfo | |
2209 | * except the one for the main process. If that ever changes | |
2210 | * for any reason, then take out the following clause and | |
2211 | * replace it with one that makes sure the ctl_fd is open. | |
2212 | */ | |
2213 | ||
2214 | if (pi->tid != 0) | |
2215 | pi = find_procinfo_or_die (pi->pid, 0); | |
2216 | ||
2217 | if (pi) | |
c906108c | 2218 | { |
c3f6f71d | 2219 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2220 | { |
c3f6f71d JM |
2221 | prdelset (&temp, signo); |
2222 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 2223 | } |
c906108c | 2224 | } |
c906108c | 2225 | |
c3f6f71d | 2226 | return 0; /* failure */ |
c906108c SS |
2227 | } |
2228 | ||
2229 | /* | |
c3f6f71d JM |
2230 | * Function: proc_get_traced_faults |
2231 | * | |
2232 | * returns the set of hardware faults that are traced /debugged. | |
2233 | * Will also copy the faultset if 'save' is non-zero. | |
2234 | */ | |
2235 | ||
2236 | fltset_t * | |
fba45db2 | 2237 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2238 | { |
2239 | fltset_t *ret = NULL; | |
2240 | ||
2241 | /* | |
2242 | * We should never have to apply this operation to any procinfo | |
2243 | * except the one for the main process. If that ever changes | |
2244 | * for any reason, then take out the following clause and | |
2245 | * replace it with one that makes sure the ctl_fd is open. | |
2246 | */ | |
2247 | ||
2248 | if (pi->tid != 0) | |
2249 | pi = find_procinfo_or_die (pi->pid, 0); | |
2250 | ||
2251 | #ifdef NEW_PROC_API | |
2252 | if (!pi->status_valid) | |
2253 | if (!proc_get_status (pi)) | |
2254 | return NULL; | |
2255 | ||
2256 | ret = &pi->prstatus.pr_flttrace; | |
2257 | #else | |
2258 | { | |
2259 | static fltset_t flttrace; | |
2260 | ||
2261 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2262 | ret = &flttrace; | |
2263 | } | |
2264 | #endif | |
2265 | if (save && ret) | |
2266 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2267 | |
c3f6f71d JM |
2268 | return ret; |
2269 | } | |
c906108c | 2270 | |
c3f6f71d JM |
2271 | /* |
2272 | * Function: proc_get_traced_sysentry | |
2273 | * | |
2274 | * returns the set of syscalls that are traced /debugged on entry. | |
2275 | * Will also copy the syscall set if 'save' is non-zero. | |
2276 | */ | |
c906108c | 2277 | |
c3f6f71d | 2278 | sysset_t * |
fba45db2 | 2279 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2280 | { |
2281 | sysset_t *ret = NULL; | |
2282 | ||
2283 | /* | |
2284 | * We should never have to apply this operation to any procinfo | |
2285 | * except the one for the main process. If that ever changes | |
2286 | * for any reason, then take out the following clause and | |
2287 | * replace it with one that makes sure the ctl_fd is open. | |
2288 | */ | |
2289 | ||
2290 | if (pi->tid != 0) | |
2291 | pi = find_procinfo_or_die (pi->pid, 0); | |
2292 | ||
2293 | #ifdef NEW_PROC_API | |
2294 | if (!pi->status_valid) | |
2295 | if (!proc_get_status (pi)) | |
2296 | return NULL; | |
2297 | ||
37de36c6 | 2298 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2299 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2300 | #else /* DYNAMIC_SYSCALLS */ |
2301 | { | |
2302 | static sysset_t *sysentry; | |
2303 | size_t size; | |
2304 | ||
2305 | if (!sysentry) | |
2306 | sysentry = sysset_t_alloc (pi); | |
2307 | ret = sysentry; | |
2308 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2309 | return NULL; | |
2310 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2311 | { | |
2312 | gdb_premptysysset (sysentry); | |
2313 | } | |
2314 | else | |
2315 | { | |
2316 | int rsize; | |
2317 | ||
2318 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2319 | SEEK_SET) | |
2320 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2321 | return NULL; | |
2322 | size = sysset_t_size (pi); | |
2323 | gdb_premptysysset (sysentry); | |
2324 | rsize = read (pi->status_fd, sysentry, size); | |
2325 | if (rsize < 0) | |
2326 | return NULL; | |
2327 | } | |
2328 | } | |
2329 | #endif /* DYNAMIC_SYSCALLS */ | |
2330 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2331 | { |
2332 | static sysset_t sysentry; | |
c906108c | 2333 | |
c3f6f71d JM |
2334 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2335 | ret = &sysentry; | |
2336 | } | |
37de36c6 | 2337 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2338 | if (save && ret) |
37de36c6 | 2339 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2340 | |
c3f6f71d JM |
2341 | return ret; |
2342 | } | |
c5aa993b | 2343 | |
c3f6f71d JM |
2344 | /* |
2345 | * Function: proc_get_traced_sysexit | |
2346 | * | |
2347 | * returns the set of syscalls that are traced /debugged on exit. | |
2348 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2349 | */ |
2350 | ||
c3f6f71d | 2351 | sysset_t * |
fba45db2 | 2352 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2353 | { |
c3f6f71d JM |
2354 | sysset_t * ret = NULL; |
2355 | ||
2356 | /* | |
2357 | * We should never have to apply this operation to any procinfo | |
2358 | * except the one for the main process. If that ever changes | |
2359 | * for any reason, then take out the following clause and | |
2360 | * replace it with one that makes sure the ctl_fd is open. | |
2361 | */ | |
2362 | ||
2363 | if (pi->tid != 0) | |
2364 | pi = find_procinfo_or_die (pi->pid, 0); | |
2365 | ||
2366 | #ifdef NEW_PROC_API | |
2367 | if (!pi->status_valid) | |
2368 | if (!proc_get_status (pi)) | |
2369 | return NULL; | |
2370 | ||
37de36c6 | 2371 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2372 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2373 | #else /* DYNAMIC_SYSCALLS */ |
2374 | { | |
2375 | static sysset_t *sysexit; | |
2376 | size_t size; | |
2377 | ||
2378 | if (!sysexit) | |
2379 | sysexit = sysset_t_alloc (pi); | |
2380 | ret = sysexit; | |
2381 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2382 | return NULL; | |
2383 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2384 | { | |
2385 | gdb_premptysysset (sysexit); | |
2386 | } | |
2387 | else | |
2388 | { | |
2389 | int rsize; | |
2390 | ||
2391 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2392 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2393 | return NULL; | |
2394 | size = sysset_t_size (pi); | |
2395 | gdb_premptysysset (sysexit); | |
2396 | rsize = read (pi->status_fd, sysexit, size); | |
2397 | if (rsize < 0) | |
2398 | return NULL; | |
2399 | } | |
2400 | } | |
2401 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2402 | #else |
2403 | { | |
2404 | static sysset_t sysexit; | |
c5aa993b | 2405 | |
c3f6f71d JM |
2406 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2407 | ret = &sysexit; | |
2408 | } | |
2409 | #endif | |
2410 | if (save && ret) | |
37de36c6 | 2411 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2412 | |
2413 | return ret; | |
2414 | } | |
c906108c | 2415 | |
c3f6f71d JM |
2416 | /* |
2417 | * Function: proc_clear_current_fault | |
2418 | * | |
2419 | * The current fault (if any) is cleared; the associated signal | |
2420 | * will not be sent to the process or LWP when it resumes. | |
2421 | * Returns non-zero for success, zero for failure. | |
2422 | */ | |
c906108c | 2423 | |
c3f6f71d | 2424 | int |
fba45db2 | 2425 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2426 | { |
2427 | int win; | |
2428 | ||
2429 | /* | |
2430 | * We should never have to apply this operation to any procinfo | |
2431 | * except the one for the main process. If that ever changes | |
2432 | * for any reason, then take out the following clause and | |
2433 | * replace it with one that makes sure the ctl_fd is open. | |
2434 | */ | |
2435 | ||
2436 | if (pi->tid != 0) | |
2437 | pi = find_procinfo_or_die (pi->pid, 0); | |
2438 | ||
2439 | #ifdef NEW_PROC_API | |
2440 | { | |
37de36c6 | 2441 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2442 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2443 | } | |
2444 | #else | |
2445 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2446 | #endif | |
2447 | ||
2448 | return win; | |
c906108c SS |
2449 | } |
2450 | ||
2451 | /* | |
c3f6f71d JM |
2452 | * Function: proc_set_current_signal |
2453 | * | |
2454 | * Set the "current signal" that will be delivered next to the process. | |
2455 | * NOTE: semantics are different from those of KILL. | |
2456 | * This signal will be delivered to the process or LWP | |
2457 | * immediately when it is resumed (even if the signal is held/blocked); | |
2458 | * it will NOT immediately cause another event of interest, and will NOT | |
2459 | * first trap back to the debugger. | |
2460 | * | |
2461 | * Returns non-zero for success, zero for failure. | |
2462 | */ | |
2463 | ||
2464 | int | |
fba45db2 | 2465 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2466 | { |
2467 | int win; | |
2468 | struct { | |
37de36c6 | 2469 | procfs_ctl_t cmd; |
c3f6f71d | 2470 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2471 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2472 | } arg; |
37de36c6 | 2473 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2474 | |
2475 | /* | |
2476 | * We should never have to apply this operation to any procinfo | |
2477 | * except the one for the main process. If that ever changes | |
2478 | * for any reason, then take out the following clause and | |
2479 | * replace it with one that makes sure the ctl_fd is open. | |
2480 | */ | |
2481 | ||
2482 | if (pi->tid != 0) | |
2483 | pi = find_procinfo_or_die (pi->pid, 0); | |
2484 | ||
2485 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2486 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2487 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2488 | * it messes up the current signal. Work around the kernel bug. | |
2489 | */ | |
2490 | if (signo > 0 && | |
2491 | signo == proc_cursig (pi)) | |
2492 | return 1; /* I assume this is a success? */ | |
2493 | #endif | |
2494 | ||
2495 | /* The pointer is just a type alias. */ | |
37de36c6 | 2496 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2497 | mysinfo->si_signo = signo; |
2498 | mysinfo->si_code = 0; | |
2499 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2500 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2501 | ||
2502 | #ifdef NEW_PROC_API | |
2503 | arg.cmd = PCSSIG; | |
2504 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2505 | #else | |
2506 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2507 | #endif | |
c906108c | 2508 | |
c3f6f71d JM |
2509 | return win; |
2510 | } | |
c906108c | 2511 | |
c3f6f71d JM |
2512 | /* |
2513 | * Function: proc_clear_current_signal | |
2514 | * | |
2515 | * The current signal (if any) is cleared, and | |
2516 | * is not sent to the process or LWP when it resumes. | |
2517 | * Returns non-zero for success, zero for failure. | |
2518 | */ | |
c906108c | 2519 | |
c3f6f71d | 2520 | int |
fba45db2 | 2521 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2522 | { |
2523 | int win; | |
2524 | ||
2525 | /* | |
2526 | * We should never have to apply this operation to any procinfo | |
2527 | * except the one for the main process. If that ever changes | |
2528 | * for any reason, then take out the following clause and | |
2529 | * replace it with one that makes sure the ctl_fd is open. | |
2530 | */ | |
2531 | ||
2532 | if (pi->tid != 0) | |
2533 | pi = find_procinfo_or_die (pi->pid, 0); | |
2534 | ||
2535 | #ifdef NEW_PROC_API | |
2536 | { | |
2537 | struct { | |
37de36c6 | 2538 | procfs_ctl_t cmd; |
c3f6f71d | 2539 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2540 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2541 | } arg; |
37de36c6 | 2542 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2543 | |
2544 | arg.cmd = PCSSIG; | |
2545 | /* The pointer is just a type alias. */ | |
37de36c6 | 2546 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2547 | mysinfo->si_signo = 0; |
2548 | mysinfo->si_code = 0; | |
2549 | mysinfo->si_errno = 0; | |
2550 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2551 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2552 | ||
2553 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2554 | } | |
2555 | #else | |
2556 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2557 | #endif | |
c906108c | 2558 | |
c3f6f71d JM |
2559 | return win; |
2560 | } | |
c906108c | 2561 | |
c3f6f71d JM |
2562 | /* |
2563 | * Function: proc_get_gregs | |
2564 | * | |
2565 | * Get the general registers for the process or LWP. | |
2566 | * Returns non-zero for success, zero for failure. | |
2567 | */ | |
c906108c | 2568 | |
c3f6f71d | 2569 | gdb_gregset_t * |
fba45db2 | 2570 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2571 | { |
2572 | if (!pi->status_valid || !pi->gregs_valid) | |
2573 | if (!proc_get_status (pi)) | |
2574 | return NULL; | |
2575 | ||
2576 | /* | |
2577 | * OK, sorry about the ifdef's. | |
2578 | * There's three cases instead of two, because | |
2579 | * in this instance Unixware and Solaris/RW differ. | |
2580 | */ | |
2581 | ||
2582 | #ifdef NEW_PROC_API | |
2583 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2584 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2585 | #else /* not Unixware */ | |
2586 | return &pi->prstatus.pr_lwp.pr_reg; | |
2587 | #endif /* Unixware */ | |
2588 | #else /* not NEW_PROC_API */ | |
2589 | return &pi->prstatus.pr_reg; | |
2590 | #endif /* NEW_PROC_API */ | |
2591 | } | |
c5aa993b | 2592 | |
c3f6f71d JM |
2593 | /* |
2594 | * Function: proc_get_fpregs | |
2595 | * | |
2596 | * Get the floating point registers for the process or LWP. | |
2597 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2598 | */ |
2599 | ||
c3f6f71d | 2600 | gdb_fpregset_t * |
fba45db2 | 2601 | proc_get_fpregs (procinfo *pi) |
c906108c | 2602 | { |
c3f6f71d JM |
2603 | #ifdef NEW_PROC_API |
2604 | if (!pi->status_valid || !pi->fpregs_valid) | |
2605 | if (!proc_get_status (pi)) | |
2606 | return NULL; | |
2607 | ||
2608 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2609 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2610 | #else | |
2611 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2612 | #endif /* Unixware */ | |
c5aa993b | 2613 | |
c3f6f71d JM |
2614 | #else /* not NEW_PROC_API */ |
2615 | if (pi->fpregs_valid) | |
2616 | return &pi->fpregset; /* already got 'em */ | |
2617 | else | |
c906108c | 2618 | { |
c3f6f71d JM |
2619 | if (pi->ctl_fd == 0 && |
2620 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2621 | { |
c3f6f71d | 2622 | return NULL; |
c906108c | 2623 | } |
c3f6f71d | 2624 | else |
c906108c | 2625 | { |
c3f6f71d JM |
2626 | #ifdef PIOCTGFPREG |
2627 | struct { | |
2628 | long pr_count; | |
2629 | tid_t pr_error_thread; | |
2630 | tfpregset_t thread_1; | |
2631 | } thread_fpregs; | |
2632 | ||
2633 | thread_fpregs.pr_count = 1; | |
2634 | thread_fpregs.thread_1.tid = pi->tid; | |
2635 | ||
2636 | if (pi->tid == 0 && | |
2637 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2638 | { | |
2639 | pi->fpregs_valid = 1; | |
2640 | return &pi->fpregset; /* got 'em now! */ | |
2641 | } | |
2642 | else if (pi->tid != 0 && | |
2643 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2644 | { | |
2645 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2646 | sizeof (pi->fpregset)); | |
2647 | pi->fpregs_valid = 1; | |
2648 | return &pi->fpregset; /* got 'em now! */ | |
2649 | } | |
2650 | else | |
2651 | { | |
2652 | return NULL; | |
2653 | } | |
2654 | #else | |
2655 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2656 | { | |
2657 | pi->fpregs_valid = 1; | |
2658 | return &pi->fpregset; /* got 'em now! */ | |
2659 | } | |
2660 | else | |
2661 | { | |
2662 | return NULL; | |
2663 | } | |
2664 | #endif | |
c906108c | 2665 | } |
c906108c | 2666 | } |
c3f6f71d | 2667 | #endif |
c906108c SS |
2668 | } |
2669 | ||
c3f6f71d JM |
2670 | /* |
2671 | * Function: proc_set_gregs | |
2672 | * | |
2673 | * Write the general registers back to the process or LWP. | |
2674 | * Returns non-zero for success, zero for failure. | |
2675 | */ | |
2676 | ||
2677 | int | |
fba45db2 | 2678 | proc_set_gregs (procinfo *pi) |
c906108c | 2679 | { |
c3f6f71d JM |
2680 | gdb_gregset_t *gregs; |
2681 | int win; | |
c5aa993b | 2682 | |
c3f6f71d JM |
2683 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2684 | return 0; /* get_regs has already warned */ | |
2685 | ||
2686 | if (pi->ctl_fd == 0 && | |
2687 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2688 | { |
c3f6f71d | 2689 | return 0; |
c906108c | 2690 | } |
c3f6f71d | 2691 | else |
c906108c | 2692 | { |
c3f6f71d JM |
2693 | #ifdef NEW_PROC_API |
2694 | struct { | |
37de36c6 | 2695 | procfs_ctl_t cmd; |
c3f6f71d JM |
2696 | /* Use char array to avoid alignment issues. */ |
2697 | char gregs[sizeof (gdb_gregset_t)]; | |
2698 | } arg; | |
2699 | ||
2700 | arg.cmd = PCSREG; | |
2701 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2702 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2703 | #else | |
2704 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2705 | #endif | |
c906108c | 2706 | } |
c3f6f71d JM |
2707 | |
2708 | /* Policy: writing the regs invalidates our cache. */ | |
2709 | pi->gregs_valid = 0; | |
2710 | return win; | |
c906108c SS |
2711 | } |
2712 | ||
c3f6f71d JM |
2713 | /* |
2714 | * Function: proc_set_fpregs | |
2715 | * | |
2716 | * Modify the floating point register set of the process or LWP. | |
2717 | * Returns non-zero for success, zero for failure. | |
2718 | */ | |
2719 | ||
2720 | int | |
fba45db2 | 2721 | proc_set_fpregs (procinfo *pi) |
c906108c | 2722 | { |
c3f6f71d JM |
2723 | gdb_fpregset_t *fpregs; |
2724 | int win; | |
2725 | ||
2726 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2727 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2728 | |
c3f6f71d JM |
2729 | if (pi->ctl_fd == 0 && |
2730 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2731 | { |
c3f6f71d | 2732 | return 0; |
c906108c | 2733 | } |
c3f6f71d | 2734 | else |
c906108c | 2735 | { |
c3f6f71d JM |
2736 | #ifdef NEW_PROC_API |
2737 | struct { | |
37de36c6 | 2738 | procfs_ctl_t cmd; |
c3f6f71d JM |
2739 | /* Use char array to avoid alignment issues. */ |
2740 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2741 | } arg; | |
2742 | ||
2743 | arg.cmd = PCSFPREG; | |
2744 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2745 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2746 | #else | |
2747 | #ifdef PIOCTSFPREG | |
2748 | if (pi->tid == 0) | |
2749 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2750 | else | |
2751 | { | |
2752 | struct { | |
2753 | long pr_count; | |
2754 | tid_t pr_error_thread; | |
2755 | tfpregset_t thread_1; | |
2756 | } thread_fpregs; | |
2757 | ||
2758 | thread_fpregs.pr_count = 1; | |
2759 | thread_fpregs.thread_1.tid = pi->tid; | |
2760 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2761 | sizeof (*fpregs)); | |
2762 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2763 | } | |
2764 | #else | |
2765 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2766 | #endif /* osf PIOCTSFPREG */ | |
2767 | #endif /* NEW_PROC_API */ | |
c906108c | 2768 | } |
c3f6f71d JM |
2769 | |
2770 | /* Policy: writing the regs invalidates our cache. */ | |
2771 | pi->fpregs_valid = 0; | |
2772 | return win; | |
c906108c SS |
2773 | } |
2774 | ||
2775 | /* | |
c3f6f71d JM |
2776 | * Function: proc_kill |
2777 | * | |
2778 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2779 | * Returns non-zero for success, zero for failure. | |
2780 | */ | |
c906108c | 2781 | |
c3f6f71d | 2782 | int |
fba45db2 | 2783 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2784 | { |
2785 | int win; | |
c906108c | 2786 | |
c3f6f71d JM |
2787 | /* |
2788 | * We might conceivably apply this operation to an LWP, and | |
2789 | * the LWP's ctl file descriptor might not be open. | |
2790 | */ | |
c906108c | 2791 | |
c3f6f71d JM |
2792 | if (pi->ctl_fd == 0 && |
2793 | open_procinfo_files (pi, FD_CTL) == 0) | |
2794 | { | |
2795 | return 0; | |
2796 | } | |
2797 | else | |
2798 | { | |
2799 | #ifdef NEW_PROC_API | |
37de36c6 | 2800 | procfs_ctl_t cmd[2]; |
c906108c | 2801 | |
c3f6f71d JM |
2802 | cmd[0] = PCKILL; |
2803 | cmd[1] = signo; | |
2804 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2805 | #else /* ioctl method */ | |
2806 | /* FIXME: do I need the Alpha OSF fixups present in | |
2807 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2808 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2809 | #endif | |
2810 | } | |
c906108c | 2811 | |
c3f6f71d JM |
2812 | return win; |
2813 | } | |
c906108c | 2814 | |
c3f6f71d JM |
2815 | /* |
2816 | * Function: proc_parent_pid | |
2817 | * | |
2818 | * Find the pid of the process that started this one. | |
2819 | * Returns the parent process pid, or zero. | |
c906108c SS |
2820 | */ |
2821 | ||
c3f6f71d | 2822 | int |
fba45db2 | 2823 | proc_parent_pid (procinfo *pi) |
c906108c | 2824 | { |
c3f6f71d JM |
2825 | /* |
2826 | * We should never have to apply this operation to any procinfo | |
2827 | * except the one for the main process. If that ever changes | |
2828 | * for any reason, then take out the following clause and | |
2829 | * replace it with one that makes sure the ctl_fd is open. | |
2830 | */ | |
2831 | ||
2832 | if (pi->tid != 0) | |
2833 | pi = find_procinfo_or_die (pi->pid, 0); | |
2834 | ||
2835 | if (!pi->status_valid) | |
2836 | if (!proc_get_status (pi)) | |
2837 | return 0; | |
c5aa993b | 2838 | |
c3f6f71d JM |
2839 | return pi->prstatus.pr_ppid; |
2840 | } | |
2841 | ||
2842 | ||
2843 | /* | |
2844 | * Function: proc_set_watchpoint | |
2845 | * | |
2846 | */ | |
2847 | ||
2848 | int | |
fba45db2 | 2849 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d JM |
2850 | { |
2851 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2852 | return 0; | |
2853 | #else | |
2854 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2855 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2856 | return 0; | |
2857 | #else | |
2858 | struct { | |
37de36c6 | 2859 | procfs_ctl_t cmd; |
c3f6f71d JM |
2860 | char watch[sizeof (prwatch_t)]; |
2861 | } arg; | |
2862 | prwatch_t *pwatch; | |
2863 | ||
2864 | pwatch = (prwatch_t *) &arg.watch; | |
831e682e MS |
2865 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
2866 | pwatch->pr_vaddr = (uintptr_t) address_to_host_pointer (addr); | |
2867 | #else | |
2868 | pwatch->pr_vaddr = (caddr_t) address_to_host_pointer (addr); | |
2869 | #endif | |
c3f6f71d JM |
2870 | pwatch->pr_size = len; |
2871 | pwatch->pr_wflags = wflags; | |
2872 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2873 | arg.cmd = PCWATCH; | |
2874 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2875 | #else | |
2876 | #if defined (PIOCSWATCH) | |
2877 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2878 | #else | |
2879 | return 0; /* Fail */ | |
2880 | #endif | |
2881 | #endif | |
2882 | #endif | |
2883 | #endif | |
c906108c SS |
2884 | } |
2885 | ||
c3f6f71d | 2886 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2887 | |
c3f6f71d | 2888 | #include <sys/sysi86.h> |
c906108c | 2889 | |
c3f6f71d JM |
2890 | /* |
2891 | * Function: proc_get_LDT_entry | |
2892 | * | |
2893 | * Inputs: | |
2894 | * procinfo *pi; | |
2895 | * int key; | |
2896 | * | |
2897 | * The 'key' is actually the value of the lower 16 bits of | |
2898 | * the GS register for the LWP that we're interested in. | |
2899 | * | |
2900 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2901 | */ |
2902 | ||
c3f6f71d | 2903 | struct ssd * |
fba45db2 | 2904 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2905 | { |
c3f6f71d JM |
2906 | static struct ssd *ldt_entry = NULL; |
2907 | #ifdef NEW_PROC_API | |
2908 | char pathname[MAX_PROC_NAME_SIZE]; | |
2909 | struct cleanup *old_chain = NULL; | |
2910 | int fd; | |
2911 | ||
2912 | /* Allocate space for one LDT entry. | |
2913 | This alloc must persist, because we return a pointer to it. */ | |
2914 | if (ldt_entry == NULL) | |
2915 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2916 | ||
2917 | /* Open the file descriptor for the LDT table. */ | |
2918 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2919 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2920 | { |
c3f6f71d JM |
2921 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2922 | return NULL; | |
c906108c | 2923 | } |
c3f6f71d | 2924 | /* Make sure it gets closed again! */ |
004527cb | 2925 | old_chain = make_cleanup_close (fd); |
c906108c | 2926 | |
c3f6f71d JM |
2927 | /* Now 'read' thru the table, find a match and return it. */ |
2928 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2929 | { |
c3f6f71d JM |
2930 | if (ldt_entry->sel == 0 && |
2931 | ldt_entry->bo == 0 && | |
2932 | ldt_entry->acc1 == 0 && | |
2933 | ldt_entry->acc2 == 0) | |
2934 | break; /* end of table */ | |
2935 | /* If key matches, return this entry. */ | |
2936 | if (ldt_entry->sel == key) | |
2937 | return ldt_entry; | |
c906108c | 2938 | } |
c3f6f71d JM |
2939 | /* Loop ended, match not found. */ |
2940 | return NULL; | |
2941 | #else | |
2942 | int nldt, i; | |
2943 | static int nalloc = 0; | |
c906108c | 2944 | |
c3f6f71d JM |
2945 | /* Get the number of LDT entries. */ |
2946 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2947 | { |
c3f6f71d JM |
2948 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2949 | return NULL; | |
c906108c SS |
2950 | } |
2951 | ||
c3f6f71d JM |
2952 | /* Allocate space for the number of LDT entries. */ |
2953 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2954 | if (nldt > nalloc) | |
c906108c | 2955 | { |
c3f6f71d JM |
2956 | ldt_entry = (struct ssd *) |
2957 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
2958 | nalloc = nldt; | |
2959 | } | |
2960 | ||
2961 | /* Read the whole table in one gulp. */ | |
2962 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2963 | { | |
2964 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2965 | return NULL; | |
c906108c SS |
2966 | } |
2967 | ||
c3f6f71d JM |
2968 | /* Search the table and return the (first) entry matching 'key'. */ |
2969 | for (i = 0; i < nldt; i++) | |
2970 | if (ldt_entry[i].sel == key) | |
2971 | return &ldt_entry[i]; | |
c906108c | 2972 | |
c3f6f71d JM |
2973 | /* Loop ended, match not found. */ |
2974 | return NULL; | |
2975 | #endif | |
2976 | } | |
c906108c | 2977 | |
c3f6f71d | 2978 | #endif /* TM_I386SOL2_H */ |
c906108c | 2979 | |
c3f6f71d | 2980 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2981 | |
c3f6f71d | 2982 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2983 | |
c3f6f71d JM |
2984 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2985 | since there is a different way to do threads on every OS. */ | |
c906108c | 2986 | |
c3f6f71d JM |
2987 | /* |
2988 | * Function: proc_get_nthreads | |
2989 | * | |
2990 | * Return the number of threads for the process | |
2991 | */ | |
c906108c | 2992 | |
c3f6f71d JM |
2993 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
2994 | /* | |
2995 | * OSF version | |
2996 | */ | |
2997 | int | |
fba45db2 | 2998 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2999 | { |
3000 | int nthreads = 0; | |
c906108c | 3001 | |
c3f6f71d JM |
3002 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3003 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3004 | |
c3f6f71d | 3005 | return nthreads; |
c906108c SS |
3006 | } |
3007 | ||
c3f6f71d JM |
3008 | #else |
3009 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3010 | /* | |
3011 | * Solaris and Unixware version | |
3012 | */ | |
3013 | int | |
fba45db2 | 3014 | proc_get_nthreads (procinfo *pi) |
c906108c | 3015 | { |
c3f6f71d JM |
3016 | if (!pi->status_valid) |
3017 | if (!proc_get_status (pi)) | |
3018 | return 0; | |
c5aa993b | 3019 | |
c3f6f71d JM |
3020 | /* |
3021 | * NEW_PROC_API: only works for the process procinfo, | |
3022 | * because the LWP procinfos do not get prstatus filled in. | |
3023 | */ | |
3024 | #ifdef NEW_PROC_API | |
3025 | if (pi->tid != 0) /* find the parent process procinfo */ | |
3026 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3027 | #endif |
c3f6f71d | 3028 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3029 | } |
3030 | ||
c3f6f71d JM |
3031 | #else |
3032 | /* | |
3033 | * Default version | |
3034 | */ | |
3035 | int | |
fba45db2 | 3036 | proc_get_nthreads (procinfo *pi) |
c906108c | 3037 | { |
c3f6f71d JM |
3038 | return 0; |
3039 | } | |
3040 | #endif | |
3041 | #endif | |
3042 | ||
3043 | /* | |
3044 | * Function: proc_get_current_thread (LWP version) | |
3045 | * | |
3046 | * Return the ID of the thread that had an event of interest. | |
3047 | * (ie. the one that hit a breakpoint or other traced event). | |
3048 | * All other things being equal, this should be the ID of a | |
3049 | * thread that is currently executing. | |
3050 | */ | |
3051 | ||
3052 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3053 | /* | |
3054 | * Solaris and Unixware version | |
3055 | */ | |
3056 | int | |
fba45db2 | 3057 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3058 | { |
3059 | /* | |
3060 | * Note: this should be applied to the root procinfo for the process, | |
3061 | * not to the procinfo for an LWP. If applied to the procinfo for | |
3062 | * an LWP, it will simply return that LWP's ID. In that case, | |
3063 | * find the parent process procinfo. | |
3064 | */ | |
3065 | ||
3066 | if (pi->tid != 0) | |
3067 | pi = find_procinfo_or_die (pi->pid, 0); | |
3068 | ||
3069 | if (!pi->status_valid) | |
3070 | if (!proc_get_status (pi)) | |
3071 | return 0; | |
3072 | ||
3073 | #ifdef NEW_PROC_API | |
3074 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3075 | #else |
c3f6f71d | 3076 | return pi->prstatus.pr_who; |
c906108c | 3077 | #endif |
c3f6f71d | 3078 | } |
c906108c | 3079 | |
c3f6f71d JM |
3080 | #else |
3081 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3082 | /* | |
3083 | * OSF version | |
3084 | */ | |
3085 | int | |
fba45db2 | 3086 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3087 | { |
3088 | #if 0 /* FIXME: not ready for prime time? */ | |
3089 | return pi->prstatus.pr_tid; | |
3090 | #else | |
3091 | return 0; | |
3092 | #endif | |
c906108c SS |
3093 | } |
3094 | ||
c3f6f71d JM |
3095 | #else |
3096 | /* | |
3097 | * Default version | |
3098 | */ | |
3099 | int | |
fba45db2 | 3100 | proc_get_current_thread (procinfo *pi) |
c906108c | 3101 | { |
c3f6f71d JM |
3102 | return 0; |
3103 | } | |
3104 | ||
3105 | #endif | |
3106 | #endif | |
c906108c | 3107 | |
c3f6f71d JM |
3108 | /* |
3109 | * Function: proc_update_threads | |
3110 | * | |
3111 | * Discover the IDs of all the threads within the process, and | |
3112 | * create a procinfo for each of them (chained to the parent). | |
3113 | * | |
3114 | * This unfortunately requires a different method on every OS. | |
3115 | * | |
3116 | * Return: non-zero for success, zero for failure. | |
3117 | */ | |
c906108c | 3118 | |
c3f6f71d | 3119 | int |
fba45db2 | 3120 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3121 | { |
3122 | if (thread && parent) /* sanity */ | |
c906108c | 3123 | { |
c3f6f71d JM |
3124 | thread->status_valid = 0; |
3125 | if (!proc_get_status (thread)) | |
3126 | destroy_one_procinfo (&parent->thread_list, thread); | |
3127 | } | |
3128 | return 0; /* keep iterating */ | |
3129 | } | |
c5aa993b | 3130 | |
c3f6f71d JM |
3131 | #if defined (PIOCLSTATUS) |
3132 | /* | |
3133 | * Solaris 2.5 (ioctl) version | |
3134 | */ | |
3135 | int | |
fba45db2 | 3136 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3137 | { |
3138 | gdb_prstatus_t *prstatus; | |
3139 | struct cleanup *old_chain = NULL; | |
3140 | procinfo *thread; | |
3141 | int nlwp, i; | |
3142 | ||
3143 | /* | |
3144 | * We should never have to apply this operation to any procinfo | |
3145 | * except the one for the main process. If that ever changes | |
3146 | * for any reason, then take out the following clause and | |
3147 | * replace it with one that makes sure the ctl_fd is open. | |
3148 | */ | |
3149 | ||
3150 | if (pi->tid != 0) | |
3151 | pi = find_procinfo_or_die (pi->pid, 0); | |
3152 | ||
3153 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3154 | ||
3155 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3156 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3157 | ||
3c37485b | 3158 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3159 | |
b8c9b27d | 3160 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3161 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3162 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3163 | ||
3164 | /* Skip element zero, which represents the process as a whole. */ | |
3165 | for (i = 1; i < nlwp + 1; i++) | |
3166 | { | |
3167 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3168 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3169 | |
c3f6f71d JM |
3170 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3171 | thread->status_valid = 1; | |
3172 | } | |
3173 | pi->threads_valid = 1; | |
3174 | do_cleanups (old_chain); | |
3175 | return 1; | |
3176 | } | |
3177 | #else | |
3178 | #ifdef NEW_PROC_API | |
3179 | /* | |
3180 | * Unixware and Solaris 6 (and later) version | |
3181 | */ | |
004527cb AC |
3182 | static void |
3183 | do_closedir_cleanup (void *dir) | |
3184 | { | |
3185 | closedir (dir); | |
3186 | } | |
3187 | ||
c3f6f71d | 3188 | int |
fba45db2 | 3189 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3190 | { |
3191 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3192 | struct dirent *direntry; | |
3193 | struct cleanup *old_chain = NULL; | |
3194 | procinfo *thread; | |
3195 | DIR *dirp; | |
3196 | int lwpid; | |
3197 | ||
3198 | /* | |
3199 | * We should never have to apply this operation to any procinfo | |
3200 | * except the one for the main process. If that ever changes | |
3201 | * for any reason, then take out the following clause and | |
3202 | * replace it with one that makes sure the ctl_fd is open. | |
3203 | */ | |
3204 | ||
3205 | if (pi->tid != 0) | |
3206 | pi = find_procinfo_or_die (pi->pid, 0); | |
3207 | ||
3208 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3209 | ||
3210 | /* | |
3211 | * Unixware | |
3212 | * | |
3213 | * Note: this brute-force method is the only way I know of | |
3214 | * to accomplish this task on Unixware. This method will | |
3215 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3216 | * and more elegant way to do this on Solaris, but the margins | |
3217 | * of this manuscript are too small to write it here... ;-) | |
3218 | */ | |
3219 | ||
3220 | strcpy (pathname, pi->pathname); | |
3221 | strcat (pathname, "/lwp"); | |
3222 | if ((dirp = opendir (pathname)) == NULL) | |
3223 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3224 | ||
004527cb | 3225 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3226 | while ((direntry = readdir (dirp)) != NULL) |
3227 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3228 | { | |
3229 | lwpid = atoi (&direntry->d_name[0]); | |
3230 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3231 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3232 | } | |
3233 | pi->threads_valid = 1; | |
3234 | do_cleanups (old_chain); | |
3235 | return 1; | |
3236 | } | |
3237 | #else | |
3238 | #ifdef PIOCTLIST | |
3239 | /* | |
3240 | * OSF version | |
3241 | */ | |
3242 | int | |
fba45db2 | 3243 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3244 | { |
3245 | int nthreads, i; | |
3246 | tid_t *threads; | |
3247 | ||
3248 | /* | |
3249 | * We should never have to apply this operation to any procinfo | |
3250 | * except the one for the main process. If that ever changes | |
3251 | * for any reason, then take out the following clause and | |
3252 | * replace it with one that makes sure the ctl_fd is open. | |
3253 | */ | |
3254 | ||
3255 | if (pi->tid != 0) | |
3256 | pi = find_procinfo_or_die (pi->pid, 0); | |
3257 | ||
3258 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3259 | ||
3260 | nthreads = proc_get_nthreads (pi); | |
3261 | if (nthreads < 2) | |
3262 | return 0; /* nothing to do for 1 or fewer threads */ | |
3263 | ||
3c37485b | 3264 | threads = xmalloc (nthreads * sizeof (tid_t)); |
c3f6f71d JM |
3265 | |
3266 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3267 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3268 | ||
3269 | for (i = 0; i < nthreads; i++) | |
3270 | { | |
3271 | if (!find_procinfo (pi->pid, threads[i])) | |
3272 | if (!create_procinfo (pi->pid, threads[i])) | |
3273 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3274 | } |
c3f6f71d JM |
3275 | pi->threads_valid = 1; |
3276 | return 1; | |
c906108c | 3277 | } |
c3f6f71d JM |
3278 | #else |
3279 | /* | |
3280 | * Default version | |
3281 | */ | |
3282 | int | |
fba45db2 | 3283 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3284 | { |
3285 | return 0; | |
3286 | } | |
3287 | #endif /* OSF PIOCTLIST */ | |
3288 | #endif /* NEW_PROC_API */ | |
3289 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3290 | |
c3f6f71d JM |
3291 | /* |
3292 | * Function: proc_iterate_over_threads | |
3293 | * | |
3294 | * Description: | |
3295 | * Given a pointer to a function, call that function once | |
3296 | * for each lwp in the procinfo list, until the function | |
3297 | * returns non-zero, in which event return the value | |
3298 | * returned by the function. | |
3299 | * | |
3300 | * Note: this function does NOT call update_threads. | |
3301 | * If you want to discover new threads first, you must | |
3302 | * call that function explicitly. This function just makes | |
3303 | * a quick pass over the currently-known procinfos. | |
3304 | * | |
3305 | * Arguments: | |
3306 | * pi - parent process procinfo | |
3307 | * func - per-thread function | |
3308 | * ptr - opaque parameter for function. | |
3309 | * | |
3310 | * Return: | |
3311 | * First non-zero return value from the callee, or zero. | |
3312 | */ | |
3313 | ||
3314 | int | |
d0849a9a KB |
3315 | proc_iterate_over_threads (procinfo *pi, |
3316 | int (*func) (procinfo *, procinfo *, void *), | |
3317 | void *ptr) | |
c906108c | 3318 | { |
c3f6f71d JM |
3319 | procinfo *thread, *next; |
3320 | int retval = 0; | |
c906108c | 3321 | |
c3f6f71d JM |
3322 | /* |
3323 | * We should never have to apply this operation to any procinfo | |
3324 | * except the one for the main process. If that ever changes | |
3325 | * for any reason, then take out the following clause and | |
3326 | * replace it with one that makes sure the ctl_fd is open. | |
3327 | */ | |
3328 | ||
3329 | if (pi->tid != 0) | |
3330 | pi = find_procinfo_or_die (pi->pid, 0); | |
3331 | ||
3332 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3333 | { |
c3f6f71d JM |
3334 | next = thread->next; /* in case thread is destroyed */ |
3335 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3336 | break; | |
c906108c | 3337 | } |
c3f6f71d JM |
3338 | |
3339 | return retval; | |
c906108c SS |
3340 | } |
3341 | ||
c3f6f71d JM |
3342 | /* =================== END, Thread "MODULE" =================== */ |
3343 | ||
3344 | /* =================== END, /proc "MODULE" =================== */ | |
3345 | ||
3346 | /* =================== GDB "MODULE" =================== */ | |
3347 | ||
3348 | /* | |
3349 | * Here are all of the gdb target vector functions and their friends. | |
3350 | */ | |
3351 | ||
39f77062 | 3352 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3353 | static void do_detach (int signo); |
37de36c6 | 3354 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
c3f6f71d JM |
3355 | |
3356 | /* | |
3357 | * Function: procfs_debug_inferior | |
3358 | * | |
3359 | * Sets up the inferior to be debugged. | |
3360 | * Registers to trace signals, hardware faults, and syscalls. | |
3361 | * Note: does not set RLC flag: caller may want to customize that. | |
3362 | * | |
3363 | * Returns: zero for success (note! unlike most functions in this module) | |
3364 | * On failure, returns the LINE NUMBER where it failed! | |
3365 | */ | |
3366 | ||
3367 | static int | |
fba45db2 | 3368 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3369 | { |
c3f6f71d | 3370 | fltset_t traced_faults; |
37de36c6 KB |
3371 | gdb_sigset_t traced_signals; |
3372 | sysset_t *traced_syscall_entries; | |
3373 | sysset_t *traced_syscall_exits; | |
3374 | int status; | |
c906108c | 3375 | |
c3f6f71d JM |
3376 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3377 | /* On some systems (OSF), we don't trace hardware faults. | |
3378 | Apparently it's enough that we catch them as signals. | |
3379 | Wonder why we don't just do that in general? */ | |
3380 | premptyset (&traced_faults); /* don't trace faults. */ | |
3381 | #else | |
3382 | /* Register to trace hardware faults in the child. */ | |
3383 | prfillset (&traced_faults); /* trace all faults... */ | |
3384 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3385 | #endif | |
3386 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3387 | return __LINE__; | |
c906108c | 3388 | |
c3f6f71d JM |
3389 | /* Register to trace selected signals in the child. */ |
3390 | premptyset (&traced_signals); | |
3391 | if (!register_gdb_signals (pi, &traced_signals)) | |
3392 | return __LINE__; | |
3393 | ||
37de36c6 | 3394 | |
c3f6f71d | 3395 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3396 | traced_syscall_entries = sysset_t_alloc (pi); |
3397 | gdb_premptysysset (traced_syscall_entries); | |
3398 | #ifdef SYS_exit | |
3399 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3400 | #endif | |
c3f6f71d | 3401 | #ifdef SYS_lwpexit |
37de36c6 | 3402 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3403 | #endif |
3404 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3405 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3406 | #endif | |
3407 | #ifdef DYNAMIC_SYSCALLS | |
3408 | { | |
3409 | int callnum = find_syscall (pi, "_exit"); | |
3410 | if (callnum >= 0) | |
3411 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3412 | } | |
c906108c SS |
3413 | #endif |
3414 | ||
37de36c6 KB |
3415 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3416 | xfree (traced_syscall_entries); | |
3417 | if (!status) | |
c3f6f71d JM |
3418 | return __LINE__; |
3419 | ||
3420 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3421 | /* OSF method for tracing exec syscalls. Quoting: | |
3422 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3423 | exits from exec system calls because of the user level loader. */ | |
3424 | /* FIXME: make nice and maybe move into an access function. */ | |
3425 | { | |
3426 | int prfs_flags; | |
3427 | ||
3428 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3429 | return __LINE__; | |
3430 | ||
3431 | prfs_flags |= PRFS_STOPEXEC; | |
3432 | ||
3433 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3434 | return __LINE__; | |
3435 | } | |
3436 | #else /* not PRFS_STOPEXEC */ | |
3437 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3438 | /* GW: Rationale... | |
3439 | Not all systems with /proc have all the exec* syscalls with the same | |
3440 | names. On the SGI, for example, there is no SYS_exec, but there | |
3441 | *is* a SYS_execv. So, we try to account for that. */ | |
3442 | ||
37de36c6 KB |
3443 | traced_syscall_exits = sysset_t_alloc (pi); |
3444 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3445 | #ifdef SYS_exec |
37de36c6 | 3446 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3447 | #endif |
3448 | #ifdef SYS_execve | |
37de36c6 | 3449 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3450 | #endif |
3451 | #ifdef SYS_execv | |
37de36c6 | 3452 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3453 | #endif |
c5aa993b | 3454 | |
c3f6f71d | 3455 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3456 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3457 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3458 | #endif |
c5aa993b | 3459 | |
c3f6f71d | 3460 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3461 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3462 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3463 | #endif |
c5aa993b | 3464 | |
37de36c6 KB |
3465 | #ifdef DYNAMIC_SYSCALLS |
3466 | { | |
3467 | int callnum = find_syscall (pi, "execve"); | |
3468 | if (callnum >= 0) | |
3469 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3470 | callnum = find_syscall (pi, "ra_execve"); | |
3471 | if (callnum >= 0) | |
3472 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3473 | } | |
3474 | #endif | |
c906108c | 3475 | |
37de36c6 KB |
3476 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3477 | xfree (traced_syscall_exits); | |
3478 | if (!status) | |
c3f6f71d JM |
3479 | return __LINE__; |
3480 | ||
3481 | #endif /* PRFS_STOPEXEC */ | |
3482 | return 0; | |
c906108c SS |
3483 | } |
3484 | ||
c3f6f71d | 3485 | static void |
fba45db2 | 3486 | procfs_attach (char *args, int from_tty) |
c906108c | 3487 | { |
c3f6f71d JM |
3488 | char *exec_file; |
3489 | int pid; | |
3490 | ||
3491 | if (!args) | |
3492 | error_no_arg ("process-id to attach"); | |
3493 | ||
3494 | pid = atoi (args); | |
3495 | if (pid == getpid ()) | |
3496 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3497 | |
c3f6f71d | 3498 | if (from_tty) |
c906108c | 3499 | { |
c3f6f71d JM |
3500 | exec_file = get_exec_file (0); |
3501 | ||
3502 | if (exec_file) | |
3503 | printf_filtered ("Attaching to program `%s', %s\n", | |
39f77062 | 3504 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3505 | else |
39f77062 KB |
3506 | printf_filtered ("Attaching to %s\n", |
3507 | target_pid_to_str (pid_to_ptid (pid))); | |
c3f6f71d JM |
3508 | |
3509 | fflush (stdout); | |
c906108c | 3510 | } |
39f77062 | 3511 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
c3f6f71d JM |
3512 | push_target (&procfs_ops); |
3513 | } | |
3514 | ||
3515 | static void | |
fba45db2 | 3516 | procfs_detach (char *args, int from_tty) |
c3f6f71d JM |
3517 | { |
3518 | char *exec_file; | |
3519 | int signo = 0; | |
3520 | ||
3521 | if (from_tty) | |
c906108c | 3522 | { |
c3f6f71d JM |
3523 | exec_file = get_exec_file (0); |
3524 | if (exec_file == 0) | |
3525 | exec_file = ""; | |
3526 | printf_filtered ("Detaching from program: %s %s\n", | |
39f77062 | 3527 | exec_file, target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3528 | fflush (stdout); |
c906108c | 3529 | } |
c3f6f71d JM |
3530 | if (args) |
3531 | signo = atoi (args); | |
3532 | ||
3533 | do_detach (signo); | |
39f77062 | 3534 | inferior_ptid = null_ptid; |
c3f6f71d | 3535 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ |
c906108c SS |
3536 | } |
3537 | ||
39f77062 KB |
3538 | static ptid_t |
3539 | do_attach (ptid_t ptid) | |
c906108c | 3540 | { |
c3f6f71d JM |
3541 | procinfo *pi; |
3542 | int fail; | |
3543 | ||
39f77062 | 3544 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
c3f6f71d JM |
3545 | perror ("procfs: out of memory in 'attach'"); |
3546 | ||
3547 | if (!open_procinfo_files (pi, FD_CTL)) | |
3548 | { | |
3549 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3550 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
39f77062 | 3551 | PIDGET (ptid)); |
c3f6f71d JM |
3552 | dead_procinfo (pi, errmsg, NOKILL); |
3553 | } | |
c906108c | 3554 | |
c3f6f71d JM |
3555 | /* Stop the process (if it isn't already stopped). */ |
3556 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3557 | { |
c3f6f71d JM |
3558 | pi->was_stopped = 1; |
3559 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3560 | } |
3561 | else | |
3562 | { | |
c3f6f71d JM |
3563 | pi->was_stopped = 0; |
3564 | /* Set the process to run again when we close it. */ | |
3565 | if (!proc_set_run_on_last_close (pi)) | |
3566 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3567 | ||
3568 | /* Now stop the process. */ | |
3569 | if (!proc_stop_process (pi)) | |
3570 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3571 | pi->ignore_next_sigstop = 1; | |
c906108c | 3572 | } |
c3f6f71d JM |
3573 | /* Save some of the /proc state to be restored if we detach. */ |
3574 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3575 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3576 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3577 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3578 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3579 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3580 | NOKILL); | |
37de36c6 | 3581 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3582 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
3583 | NOKILL); | |
3584 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3585 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3586 | ||
3587 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3588 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3589 | ||
3590 | /* Let GDB know that the inferior was attached. */ | |
3591 | attach_flag = 1; | |
3592 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3593 | } |
3594 | ||
3595 | static void | |
fba45db2 | 3596 | do_detach (int signo) |
c906108c | 3597 | { |
c3f6f71d | 3598 | procinfo *pi; |
c906108c | 3599 | |
c3f6f71d | 3600 | /* Find procinfo for the main process */ |
39f77062 | 3601 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3602 | if (signo) |
3603 | if (!proc_set_current_signal (pi, signo)) | |
3604 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3605 | |
c3f6f71d JM |
3606 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3607 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3608 | |
c3f6f71d JM |
3609 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3610 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3611 | ||
37de36c6 | 3612 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3613 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3614 | ||
37de36c6 | 3615 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3616 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3617 | ||
3618 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3619 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3620 | ||
3621 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3622 | if (signo || !(pi->was_stopped) || | |
3623 | query ("Was stopped when attached, make it runnable again? ")) | |
3624 | { | |
3625 | /* Clear any pending signal. */ | |
3626 | if (!proc_clear_current_fault (pi)) | |
3627 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3628 | ||
3629 | if (!proc_set_run_on_last_close (pi)) | |
3630 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3631 | } | |
3632 | ||
3633 | attach_flag = 0; | |
3634 | destroy_procinfo (pi); | |
c906108c SS |
3635 | } |
3636 | ||
c3f6f71d JM |
3637 | /* |
3638 | * fetch_registers | |
3639 | * | |
3640 | * Since the /proc interface cannot give us individual registers, | |
3641 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3642 | * This results in the possibility that we will do unnecessarily many | |
3643 | * fetches, since we may be called repeatedly for individual registers. | |
3644 | * So we cache the results, and mark the cache invalid when the process | |
3645 | * is resumed. | |
3646 | */ | |
3647 | ||
c906108c | 3648 | static void |
fba45db2 | 3649 | procfs_fetch_registers (int regno) |
c906108c | 3650 | { |
c3f6f71d JM |
3651 | gdb_fpregset_t *fpregs; |
3652 | gdb_gregset_t *gregs; | |
3653 | procinfo *pi; | |
3654 | int pid; | |
3655 | int tid; | |
c906108c | 3656 | |
39f77062 KB |
3657 | pid = PIDGET (inferior_ptid); |
3658 | tid = TIDGET (inferior_ptid); | |
c3f6f71d JM |
3659 | |
3660 | /* First look up procinfo for the main process. */ | |
3661 | pi = find_procinfo_or_die (pid, 0); | |
3662 | ||
3663 | /* If the event thread is not the same as GDB's requested thread | |
39f77062 | 3664 | (ie. inferior_ptid), then look up procinfo for the requested |
c3f6f71d JM |
3665 | thread. */ |
3666 | if ((tid != 0) && | |
3667 | (tid != proc_get_current_thread (pi))) | |
3668 | pi = find_procinfo_or_die (pid, tid); | |
3669 | ||
3670 | if (pi == NULL) | |
3671 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
39f77062 | 3672 | target_pid_to_str (inferior_ptid)); |
c3f6f71d JM |
3673 | |
3674 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3675 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3676 | ||
3677 | supply_gregset (gregs); | |
3678 | ||
60054393 MS |
3679 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3680 | { | |
3681 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3682 | regno == PC_REGNUM || | |
3683 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3684 | regno == FP_REGNUM || | |
3685 | regno == SP_REGNUM) | |
3686 | return; /* not a floating point register */ | |
c5aa993b | 3687 | |
60054393 MS |
3688 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3689 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3690 | |
60054393 MS |
3691 | supply_fpregset (fpregs); |
3692 | } | |
c906108c SS |
3693 | } |
3694 | ||
c3f6f71d JM |
3695 | /* Get ready to modify the registers array. On machines which store |
3696 | individual registers, this doesn't need to do anything. On | |
3697 | machines which store all the registers in one fell swoop, such as | |
3698 | /proc, this makes sure that registers contains all the registers | |
3699 | from the program being debugged. */ | |
3700 | ||
c906108c | 3701 | static void |
fba45db2 | 3702 | procfs_prepare_to_store (void) |
c906108c | 3703 | { |
c3f6f71d JM |
3704 | #ifdef CHILD_PREPARE_TO_STORE |
3705 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3706 | #endif |
c906108c SS |
3707 | } |
3708 | ||
3709 | /* | |
c3f6f71d JM |
3710 | * store_registers |
3711 | * | |
3712 | * Since the /proc interface will not read individual registers, | |
3713 | * we will cache these requests until the process is resumed, and | |
3714 | * only then write them back to the inferior process. | |
3715 | * | |
3716 | * FIXME: is that a really bad idea? Have to think about cases | |
3717 | * where writing one register might affect the value of others, etc. | |
3718 | */ | |
c906108c | 3719 | |
c3f6f71d | 3720 | static void |
fba45db2 | 3721 | procfs_store_registers (int regno) |
c3f6f71d JM |
3722 | { |
3723 | gdb_fpregset_t *fpregs; | |
3724 | gdb_gregset_t *gregs; | |
3725 | procinfo *pi; | |
3726 | int pid; | |
3727 | int tid; | |
c906108c | 3728 | |
39f77062 KB |
3729 | pid = PIDGET (inferior_ptid); |
3730 | tid = TIDGET (inferior_ptid); | |
c906108c | 3731 | |
c3f6f71d JM |
3732 | /* First find procinfo for main process */ |
3733 | pi = find_procinfo_or_die (pid, 0); | |
3734 | ||
3735 | /* If current lwp for process is not the same as requested thread | |
39f77062 | 3736 | (ie. inferior_ptid), then find procinfo for the requested thread. */ |
c3f6f71d JM |
3737 | |
3738 | if ((tid != 0) && | |
3739 | (tid != proc_get_current_thread (pi))) | |
3740 | pi = find_procinfo_or_die (pid, tid); | |
3741 | ||
3742 | if (pi == NULL) | |
3743 | error ("procfs: store_registers: failed to find procinfo for %s", | |
39f77062 | 3744 | target_pid_to_str (inferior_ptid)); |
c906108c | 3745 | |
c3f6f71d JM |
3746 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3747 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3748 | |
c3f6f71d JM |
3749 | fill_gregset (gregs, regno); |
3750 | if (!proc_set_gregs (pi)) | |
3751 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3752 | |
60054393 MS |
3753 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3754 | { | |
3755 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3756 | regno == PC_REGNUM || | |
3757 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3758 | regno == FP_REGNUM || | |
3759 | regno == SP_REGNUM) | |
3760 | return; /* not a floating point register */ | |
3761 | ||
3762 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3763 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3764 | ||
3765 | fill_fpregset (fpregs, regno); | |
3766 | if (!proc_set_fpregs (pi)) | |
3767 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3768 | } | |
c3f6f71d | 3769 | } |
c906108c | 3770 | |
37de36c6 KB |
3771 | static int |
3772 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3773 | { | |
3774 | ||
3775 | #ifdef SYS_lwp_exit | |
3776 | if (scall == SYS_lwp_exit) | |
3777 | return 1; | |
3778 | #endif | |
3779 | #ifdef SYS_lwpexit | |
3780 | if (scall == SYS_lwpexit) | |
3781 | return 1; | |
3782 | #endif | |
3783 | return 0; | |
3784 | } | |
3785 | ||
3786 | static int | |
3787 | syscall_is_exit (procinfo *pi, int scall) | |
3788 | { | |
3789 | #ifdef SYS_exit | |
3790 | if (scall == SYS_exit) | |
3791 | return 1; | |
3792 | #endif | |
3793 | #ifdef DYNAMIC_SYSCALLS | |
3794 | if (find_syscall (pi, "_exit") == scall) | |
3795 | return 1; | |
3796 | #endif | |
3797 | return 0; | |
3798 | } | |
3799 | ||
3800 | static int | |
3801 | syscall_is_exec (procinfo *pi, int scall) | |
3802 | { | |
3803 | #ifdef SYS_exec | |
3804 | if (scall == SYS_exec) | |
3805 | return 1; | |
3806 | #endif | |
3807 | #ifdef SYS_execv | |
3808 | if (scall == SYS_execv) | |
3809 | return 1; | |
3810 | #endif | |
3811 | #ifdef SYS_execve | |
3812 | if (scall == SYS_execve) | |
3813 | return 1; | |
3814 | #endif | |
3815 | #ifdef DYNAMIC_SYSCALLS | |
3816 | if (find_syscall (pi, "_execve")) | |
3817 | return 1; | |
3818 | if (find_syscall (pi, "ra_execve")) | |
3819 | return 1; | |
3820 | #endif | |
3821 | return 0; | |
3822 | } | |
3823 | ||
3824 | static int | |
3825 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3826 | { | |
3827 | #ifdef SYS_lwp_create | |
3828 | if (scall == SYS_lwp_create) | |
3829 | return 1; | |
3830 | #endif | |
3831 | #ifdef SYS_lwpcreate | |
3832 | if (scall == SYS_lwpcreate) | |
3833 | return 1; | |
3834 | #endif | |
3835 | return 0; | |
3836 | } | |
3837 | ||
c3f6f71d JM |
3838 | /* |
3839 | * Function: target_wait | |
3840 | * | |
3841 | * Retrieve the next stop event from the child process. | |
3842 | * If child has not stopped yet, wait for it to stop. | |
3843 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3844 | * into gdb internal event codes. | |
3845 | * | |
3846 | * Return: id of process (and possibly thread) that incurred the event. | |
3847 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3848 | */ |
3849 | ||
39f77062 KB |
3850 | static ptid_t |
3851 | procfs_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c | 3852 | { |
c3f6f71d JM |
3853 | /* First cut: loosely based on original version 2.1 */ |
3854 | procinfo *pi; | |
39f77062 KB |
3855 | int wstat; |
3856 | int temp_tid; | |
3857 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3858 | int why, what, flags; |
3859 | int retry = 0; | |
c906108c | 3860 | |
c3f6f71d | 3861 | wait_again: |
c906108c | 3862 | |
c3f6f71d JM |
3863 | retry++; |
3864 | wstat = 0; | |
39f77062 | 3865 | retval = pid_to_ptid (-1); |
c906108c | 3866 | |
c3f6f71d | 3867 | /* Find procinfo for main process */ |
39f77062 | 3868 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3869 | if (pi) |
c906108c | 3870 | { |
c3f6f71d JM |
3871 | /* We must assume that the status is stale now... */ |
3872 | pi->status_valid = 0; | |
3873 | pi->gregs_valid = 0; | |
3874 | pi->fpregs_valid = 0; | |
3875 | ||
3876 | #if 0 /* just try this out... */ | |
3877 | flags = proc_flags (pi); | |
3878 | why = proc_why (pi); | |
3879 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3880 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3881 | #endif | |
3882 | /* If child is not stopped, wait for it to stop. */ | |
3883 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3884 | !proc_wait_for_stop (pi)) | |
c906108c | 3885 | { |
c3f6f71d JM |
3886 | /* wait_for_stop failed: has the child terminated? */ |
3887 | if (errno == ENOENT) | |
c906108c | 3888 | { |
39f77062 KB |
3889 | int wait_retval; |
3890 | ||
c3f6f71d | 3891 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 3892 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 3893 | |
39f77062 | 3894 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
c3f6f71d | 3895 | error ("procfs: couldn't stop process %d: wait returned %d\n", |
39f77062 | 3896 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
3897 | /* FIXME: might I not just use waitpid? |
3898 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 3899 | retval = pid_to_ptid (wait_retval); |
c906108c | 3900 | } |
d1566ff5 FN |
3901 | else if (errno == EINTR) |
3902 | goto wait_again; | |
c3f6f71d | 3903 | else |
c906108c | 3904 | { |
c3f6f71d JM |
3905 | /* Unknown error from wait_for_stop. */ |
3906 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3907 | } |
c3f6f71d JM |
3908 | } |
3909 | else | |
3910 | { | |
3911 | /* This long block is reached if either: | |
3912 | a) the child was already stopped, or | |
3913 | b) we successfully waited for the child with wait_for_stop. | |
3914 | This block will analyze the /proc status, and translate it | |
3915 | into a waitstatus for GDB. | |
3916 | ||
3917 | If we actually had to call wait because the /proc file | |
3918 | is gone (child terminated), then we skip this block, | |
3919 | because we already have a waitstatus. */ | |
3920 | ||
3921 | flags = proc_flags (pi); | |
3922 | why = proc_why (pi); | |
3923 | what = proc_what (pi); | |
3924 | ||
c3f6f71d | 3925 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3926 | { |
c3f6f71d JM |
3927 | #ifdef PR_ASYNC |
3928 | /* If it's running async (for single_thread control), | |
3929 | set it back to normal again. */ | |
3930 | if (flags & PR_ASYNC) | |
3931 | if (!proc_unset_async (pi)) | |
3932 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3933 | #endif | |
3934 | ||
3935 | if (info_verbose) | |
3936 | proc_prettyprint_why (why, what, 1); | |
3937 | ||
3938 | /* The 'pid' we will return to GDB is composed of | |
3939 | the process ID plus the lwp ID. */ | |
3940 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3941 | ||
3942 | switch (why) { | |
3943 | case PR_SIGNALLED: | |
3944 | wstat = (what << 8) | 0177; | |
3945 | break; | |
3946 | case PR_SYSENTRY: | |
37de36c6 | 3947 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3948 | { |
37de36c6 KB |
3949 | printf_filtered ("[%s exited]\n", |
3950 | target_pid_to_str (retval)); | |
3951 | delete_thread (retval); | |
3952 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3953 | return retval; | |
3954 | } | |
3955 | else if (syscall_is_exit (pi, what)) | |
3956 | { | |
3957 | /* Handle SYS_exit call only */ | |
3958 | /* Stopped at entry to SYS_exit. | |
3959 | Make it runnable, resume it, then use | |
3960 | the wait system call to get its exit code. | |
3961 | Proc_run_process always clears the current | |
3962 | fault and signal. | |
3963 | Then return its exit status. */ | |
3964 | pi->status_valid = 0; | |
3965 | wstat = 0; | |
3966 | /* FIXME: what we should do is return | |
3967 | TARGET_WAITKIND_SPURIOUS. */ | |
3968 | if (!proc_run_process (pi, 0, 0)) | |
3969 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3970 | if (attach_flag) | |
c3f6f71d | 3971 | { |
37de36c6 KB |
3972 | /* Don't call wait: simulate waiting for exit, |
3973 | return a "success" exit code. Bogus: what if | |
3974 | it returns something else? */ | |
3975 | wstat = 0; | |
39f77062 | 3976 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3977 | } |
3978 | else | |
3979 | { | |
3980 | int temp = wait (&wstat); | |
3981 | ||
3982 | /* FIXME: shouldn't I make sure I get the right | |
3983 | event from the right process? If (for | |
3984 | instance) I have killed an earlier inferior | |
3985 | process but failed to clean up after it | |
3986 | somehow, I could get its termination event | |
3987 | here. */ | |
3988 | ||
3989 | /* If wait returns -1, that's what we return to GDB. */ | |
3990 | if (temp < 0) | |
39f77062 | 3991 | retval = pid_to_ptid (temp); |
c3f6f71d | 3992 | } |
c3f6f71d | 3993 | } |
37de36c6 KB |
3994 | else |
3995 | { | |
3996 | printf_filtered ("procfs: trapped on entry to "); | |
3997 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3998 | printf_filtered ("\n"); | |
3999 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4000 | { |
37de36c6 | 4001 | long i, nsysargs, *sysargs; |
c3f6f71d | 4002 | |
37de36c6 KB |
4003 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4004 | (sysargs = proc_sysargs (pi)) != NULL) | |
4005 | { | |
4006 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4007 | for (i = 0; i < nsysargs; i++) | |
4008 | printf_filtered ("#%ld: 0x%08lx\n", | |
4009 | i, sysargs[i]); | |
4010 | } | |
c3f6f71d | 4011 | |
c3f6f71d | 4012 | } |
c3f6f71d | 4013 | #endif |
37de36c6 KB |
4014 | if (status) |
4015 | { | |
4016 | /* How to exit gracefully, returning "unknown event" */ | |
4017 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4018 | return inferior_ptid; |
37de36c6 KB |
4019 | } |
4020 | else | |
4021 | { | |
4022 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4023 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4024 | goto wait_again; |
4025 | } | |
4026 | } | |
4027 | break; | |
4028 | case PR_SYSEXIT: | |
4029 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4030 | { |
37de36c6 KB |
4031 | /* Hopefully this is our own "fork-child" execing |
4032 | the real child. Hoax this event into a trap, and | |
4033 | GDB will see the child about to execute its start | |
4034 | address. */ | |
4035 | wstat = (SIGTRAP << 8) | 0177; | |
4036 | } | |
4037 | else if (syscall_is_lwp_create (pi, what)) | |
4038 | { | |
4039 | /* | |
4040 | * This syscall is somewhat like fork/exec. | |
4041 | * We will get the event twice: once for the parent LWP, | |
4042 | * and once for the child. We should already know about | |
4043 | * the parent LWP, but the child will be new to us. So, | |
4044 | * whenever we get this event, if it represents a new | |
4045 | * thread, simply add the thread to the list. | |
4046 | */ | |
c3f6f71d | 4047 | |
37de36c6 | 4048 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4049 | temp_tid = proc_get_current_thread (pi); |
4050 | if (!find_procinfo (pi->pid, temp_tid)) | |
4051 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4052 | |
39f77062 | 4053 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4054 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4055 | if (!in_thread_list (temp_ptid)) |
c3f6f71d | 4056 | { |
39f77062 KB |
4057 | printf_filtered ("[New %s]\n", |
4058 | target_pid_to_str (temp_ptid)); | |
4059 | add_thread (temp_ptid); | |
c3f6f71d | 4060 | } |
37de36c6 KB |
4061 | /* Return to WFI, but tell it to immediately resume. */ |
4062 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4063 | return inferior_ptid; |
37de36c6 KB |
4064 | } |
4065 | else if (syscall_is_lwp_exit (pi, what)) | |
4066 | { | |
4067 | printf_filtered ("[%s exited]\n", | |
4068 | target_pid_to_str (retval)); | |
4069 | delete_thread (retval); | |
4070 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4071 | return retval; | |
c3f6f71d | 4072 | } |
37de36c6 KB |
4073 | else if (0) |
4074 | { | |
4075 | /* FIXME: Do we need to handle SYS_sproc, | |
4076 | SYS_fork, or SYS_vfork here? The old procfs | |
4077 | seemed to use this event to handle threads on | |
4078 | older (non-LWP) systems, where I'm assuming | |
4079 | that threads were actually separate processes. | |
4080 | Irix, maybe? Anyway, low priority for now. */ | |
4081 | } | |
4082 | else | |
4083 | { | |
4084 | printf_filtered ("procfs: trapped on exit from "); | |
4085 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4086 | printf_filtered ("\n"); | |
4087 | #ifndef PIOCSSPCACT | |
4088 | { | |
4089 | long i, nsysargs, *sysargs; | |
4090 | ||
4091 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4092 | (sysargs = proc_sysargs (pi)) != NULL) | |
4093 | { | |
4094 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4095 | for (i = 0; i < nsysargs; i++) | |
4096 | printf_filtered ("#%ld: 0x%08lx\n", | |
4097 | i, sysargs[i]); | |
4098 | } | |
4099 | } | |
c3f6f71d | 4100 | #endif |
37de36c6 | 4101 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4102 | return inferior_ptid; |
37de36c6 | 4103 | } |
c3f6f71d JM |
4104 | break; |
4105 | case PR_REQUESTED: | |
4106 | #if 0 /* FIXME */ | |
4107 | wstat = (SIGSTOP << 8) | 0177; | |
4108 | break; | |
4109 | #else | |
4110 | if (retry < 5) | |
4111 | { | |
4112 | printf_filtered ("Retry #%d:\n", retry); | |
4113 | pi->status_valid = 0; | |
4114 | goto wait_again; | |
4115 | } | |
4116 | else | |
4117 | { | |
4118 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4119 | temp_tid = proc_get_current_thread (pi); |
4120 | if (!find_procinfo (pi->pid, temp_tid)) | |
4121 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4122 | |
4123 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4124 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4125 | if (!in_thread_list (temp_ptid)) | |
c3f6f71d | 4126 | { |
0d06e24b | 4127 | printf_filtered ("[New %s]\n", |
39f77062 KB |
4128 | target_pid_to_str (temp_ptid)); |
4129 | add_thread (temp_ptid); | |
c3f6f71d JM |
4130 | } |
4131 | ||
4132 | status->kind = TARGET_WAITKIND_STOPPED; | |
4133 | status->value.sig = 0; | |
4134 | return retval; | |
4135 | } | |
4136 | #endif | |
4137 | case PR_JOBCONTROL: | |
4138 | wstat = (what << 8) | 0177; | |
4139 | break; | |
4140 | case PR_FAULTED: | |
4141 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
4142 | #ifdef FLTWATCH | |
4143 | case FLTWATCH: | |
4144 | wstat = (SIGTRAP << 8) | 0177; | |
4145 | break; | |
4146 | #endif | |
4147 | #ifdef FLTKWATCH | |
4148 | case FLTKWATCH: | |
4149 | wstat = (SIGTRAP << 8) | 0177; | |
4150 | break; | |
4151 | #endif | |
4152 | /* FIXME: use si_signo where possible. */ | |
4153 | case FLTPRIV: | |
4154 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4155 | case FLTILL: | |
4156 | #endif | |
4157 | wstat = (SIGILL << 8) | 0177; | |
4158 | break; | |
4159 | case FLTBPT: | |
4160 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4161 | case FLTTRACE: | |
4162 | #endif | |
4163 | wstat = (SIGTRAP << 8) | 0177; | |
4164 | break; | |
4165 | case FLTSTACK: | |
4166 | case FLTACCESS: | |
4167 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4168 | case FLTBOUNDS: | |
4169 | #endif | |
4170 | wstat = (SIGSEGV << 8) | 0177; | |
4171 | break; | |
4172 | case FLTIOVF: | |
4173 | case FLTIZDIV: | |
4174 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4175 | case FLTFPE: | |
4176 | #endif | |
4177 | wstat = (SIGFPE << 8) | 0177; | |
4178 | break; | |
4179 | case FLTPAGE: /* Recoverable page fault */ | |
4180 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4181 | retval = pid_to_ptid (-1); |
c3f6f71d JM |
4182 | printf_filtered ("procfs:%d -- ", __LINE__); |
4183 | printf_filtered ("child stopped for unknown reason:\n"); | |
4184 | proc_prettyprint_why (why, what, 1); | |
4185 | error ("... giving up..."); | |
4186 | break; | |
4187 | } | |
4188 | break; /* case PR_FAULTED: */ | |
4189 | default: /* switch (why) unmatched */ | |
4190 | printf_filtered ("procfs:%d -- ", __LINE__); | |
4191 | printf_filtered ("child stopped for unknown reason:\n"); | |
4192 | proc_prettyprint_why (why, what, 1); | |
4193 | error ("... giving up..."); | |
4194 | break; | |
4195 | } | |
4196 | /* | |
4197 | * Got this far without error: | |
4198 | * If retval isn't in the threads database, add it. | |
4199 | */ | |
39f77062 KB |
4200 | if (PIDGET (retval) > 0 && |
4201 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4202 | !in_thread_list (retval)) |
c906108c | 4203 | { |
c3f6f71d JM |
4204 | /* |
4205 | * We have a new thread. | |
4206 | * We need to add it both to GDB's list and to our own. | |
4207 | * If we don't create a procinfo, resume may be unhappy | |
4208 | * later. | |
4209 | */ | |
4210 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
4211 | add_thread (retval); | |
4212 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4213 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
4214 | ||
4215 | /* In addition, it's possible that this is the first | |
4216 | * new thread we've seen, in which case we may not | |
39f77062 | 4217 | * have created entries for inferior_ptid yet. |
c3f6f71d | 4218 | */ |
39f77062 | 4219 | if (TIDGET (inferior_ptid) != 0) |
c3f6f71d | 4220 | { |
39f77062 KB |
4221 | if (!in_thread_list (inferior_ptid)) |
4222 | add_thread (inferior_ptid); | |
4223 | if (find_procinfo (PIDGET (inferior_ptid), | |
4224 | TIDGET (inferior_ptid)) == NULL) | |
4225 | create_procinfo (PIDGET (inferior_ptid), | |
4226 | TIDGET (inferior_ptid)); | |
c3f6f71d | 4227 | } |
c906108c | 4228 | } |
c906108c | 4229 | } |
c3f6f71d | 4230 | else /* flags do not indicate STOPPED */ |
c906108c | 4231 | { |
c3f6f71d JM |
4232 | /* surely this can't happen... */ |
4233 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4234 | __LINE__); | |
4235 | proc_prettyprint_flags (flags, 1); | |
4236 | error ("procfs: ...giving up..."); | |
c906108c | 4237 | } |
c906108c | 4238 | } |
c906108c | 4239 | |
c3f6f71d JM |
4240 | if (status) |
4241 | store_waitstatus (status, wstat); | |
c906108c SS |
4242 | } |
4243 | ||
c3f6f71d JM |
4244 | return retval; |
4245 | } | |
c906108c | 4246 | |
d0849a9a KB |
4247 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4248 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4249 | otherwise transfer them from the target. TARGET is unused. | |
4250 | ||
4251 | The return value is 0 if an error occurred or no bytes were | |
4252 | transferred. Otherwise, it will be a positive value which | |
4253 | indicates the number of bytes transferred between gdb and the | |
4254 | target. (Note that the interface also makes provisions for | |
4255 | negative values, but this capability isn't implemented here.) */ | |
4256 | ||
c3f6f71d | 4257 | static int |
d0849a9a | 4258 | procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite, |
37de36c6 | 4259 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4260 | { |
4261 | procinfo *pi; | |
4262 | int nbytes = 0; | |
c906108c | 4263 | |
c3f6f71d | 4264 | /* Find procinfo for main process */ |
39f77062 | 4265 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4266 | if (pi->as_fd == 0 && |
4267 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4268 | { |
c3f6f71d JM |
4269 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4270 | return 0; | |
c906108c | 4271 | } |
c906108c | 4272 | |
c3f6f71d | 4273 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4274 | { |
c3f6f71d | 4275 | if (dowrite) |
c906108c | 4276 | { |
c3f6f71d JM |
4277 | #ifdef NEW_PROC_API |
4278 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4279 | #else |
c3f6f71d | 4280 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4281 | #endif |
c3f6f71d | 4282 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4283 | } |
c3f6f71d | 4284 | else |
c906108c | 4285 | { |
c3f6f71d JM |
4286 | PROCFS_NOTE ("read memory: \n"); |
4287 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4288 | } |
c3f6f71d | 4289 | if (nbytes < 0) |
c906108c | 4290 | { |
c3f6f71d | 4291 | nbytes = 0; |
c906108c | 4292 | } |
c906108c | 4293 | } |
c3f6f71d | 4294 | return nbytes; |
c906108c SS |
4295 | } |
4296 | ||
4297 | /* | |
c3f6f71d JM |
4298 | * Function: invalidate_cache |
4299 | * | |
4300 | * Called by target_resume before making child runnable. | |
4301 | * Mark cached registers and status's invalid. | |
4302 | * If there are "dirty" caches that need to be written back | |
4303 | * to the child process, do that. | |
4304 | * | |
4305 | * File descriptors are also cached. | |
4306 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4307 | * However, as they are expensive to open, we don't want to throw them | |
4308 | * away indescriminately either. As a compromise, we will keep the | |
4309 | * file descriptors for the parent process, but discard any file | |
4310 | * descriptors we may have accumulated for the threads. | |
4311 | * | |
4312 | * Return value: | |
4313 | * As this function is called by iterate_over_threads, it always | |
4314 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
4315 | */ |
4316 | ||
c3f6f71d JM |
4317 | |
4318 | static int | |
fba45db2 | 4319 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4320 | { |
c3f6f71d JM |
4321 | /* |
4322 | * About to run the child; invalidate caches and do any other cleanup. | |
4323 | */ | |
c906108c | 4324 | |
c3f6f71d JM |
4325 | #if 0 |
4326 | if (pi->gregs_dirty) | |
4327 | if (parent == NULL || | |
4328 | proc_get_current_thread (parent) != pi->tid) | |
4329 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4330 | proc_warn (pi, "target_resume, set_gregs", | |
4331 | __LINE__); | |
60054393 MS |
4332 | if (FP0_REGNUM >= 0) |
4333 | if (pi->fpregs_dirty) | |
4334 | if (parent == NULL || | |
4335 | proc_get_current_thread (parent) != pi->tid) | |
4336 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4337 | proc_warn (pi, "target_resume, set_fpregs", | |
4338 | __LINE__); | |
c906108c | 4339 | #endif |
c906108c | 4340 | |
c3f6f71d | 4341 | if (parent != NULL) |
c906108c | 4342 | { |
c3f6f71d JM |
4343 | /* The presence of a parent indicates that this is an LWP. |
4344 | Close any file descriptors that it might have open. | |
4345 | We don't do this to the master (parent) procinfo. */ | |
4346 | ||
4347 | close_procinfo_files (pi); | |
c906108c | 4348 | } |
c3f6f71d JM |
4349 | pi->gregs_valid = 0; |
4350 | pi->fpregs_valid = 0; | |
4351 | #if 0 | |
4352 | pi->gregs_dirty = 0; | |
4353 | pi->fpregs_dirty = 0; | |
c906108c | 4354 | #endif |
c3f6f71d JM |
4355 | pi->status_valid = 0; |
4356 | pi->threads_valid = 0; | |
c906108c | 4357 | |
c3f6f71d | 4358 | return 0; |
c906108c SS |
4359 | } |
4360 | ||
0fda6bd2 | 4361 | #if 0 |
c906108c | 4362 | /* |
c3f6f71d JM |
4363 | * Function: make_signal_thread_runnable |
4364 | * | |
4365 | * A callback function for iterate_over_threads. | |
4366 | * Find the asynchronous signal thread, and make it runnable. | |
4367 | * See if that helps matters any. | |
c906108c SS |
4368 | */ |
4369 | ||
c3f6f71d | 4370 | static int |
fba45db2 | 4371 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4372 | { |
c3f6f71d JM |
4373 | #ifdef PR_ASLWP |
4374 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4375 | { |
c3f6f71d JM |
4376 | if (!proc_run_process (pi, 0, -1)) |
4377 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4378 | return 1; | |
c906108c | 4379 | } |
c906108c | 4380 | #endif |
c3f6f71d | 4381 | return 0; |
c906108c | 4382 | } |
0fda6bd2 | 4383 | #endif |
c906108c SS |
4384 | |
4385 | /* | |
c3f6f71d JM |
4386 | * Function: target_resume |
4387 | * | |
4388 | * Make the child process runnable. Normally we will then call | |
4389 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4390 | * | |
4391 | * Arguments: | |
4392 | * step: if true, then arrange for the child to stop again | |
4393 | * after executing a single instruction. | |
4394 | * signo: if zero, then cancel any pending signal. | |
4395 | * If non-zero, then arrange for the indicated signal | |
4396 | * to be delivered to the child when it runs. | |
4397 | * pid: if -1, then allow any child thread to run. | |
4398 | * if non-zero, then allow only the indicated thread to run. | |
4399 | ******* (not implemented yet) | |
c906108c SS |
4400 | */ |
4401 | ||
4402 | static void | |
39f77062 | 4403 | procfs_resume (ptid_t ptid, int step, enum target_signal signo) |
c906108c | 4404 | { |
c3f6f71d JM |
4405 | procinfo *pi, *thread; |
4406 | int native_signo; | |
4407 | ||
4408 | /* 2.1: | |
4409 | prrun.prflags |= PRSVADDR; | |
4410 | prrun.pr_vaddr = $PC; set resume address | |
4411 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4412 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4413 | prrun.prflags |= PRCFAULT; clear current fault. | |
4414 | ||
4415 | PRSTRACE and PRSFAULT can be done by other means | |
4416 | (proc_trace_signals, proc_trace_faults) | |
4417 | PRSVADDR is unnecessary. | |
4418 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4419 | This basically leaves PRSTEP and PRCSIG. | |
4420 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4421 | So basically PR_STEP is the sole argument that must be passed | |
4422 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4423 | ||
4424 | /* Find procinfo for main process */ | |
39f77062 | 4425 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4426 | |
4427 | /* First cut: ignore pid argument */ | |
4428 | errno = 0; | |
c906108c | 4429 | |
c3f6f71d JM |
4430 | /* Convert signal to host numbering. */ |
4431 | if (signo == 0 || | |
0fda6bd2 | 4432 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4433 | native_signo = 0; |
4434 | else | |
4435 | native_signo = target_signal_to_host (signo); | |
c906108c | 4436 | |
c3f6f71d | 4437 | pi->ignore_next_sigstop = 0; |
c906108c | 4438 | |
c3f6f71d JM |
4439 | /* Running the process voids all cached registers and status. */ |
4440 | /* Void the threads' caches first */ | |
4441 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4442 | /* Void the process procinfo's caches. */ | |
4443 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4444 | |
39f77062 | 4445 | if (PIDGET (ptid) != -1) |
c906108c | 4446 | { |
c3f6f71d | 4447 | /* Resume a specific thread, presumably suppressing the others. */ |
39f77062 | 4448 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4449 | if (thread != NULL) |
c906108c | 4450 | { |
c3f6f71d JM |
4451 | if (thread->tid != 0) |
4452 | { | |
4453 | /* We're to resume a specific thread, and not the others. | |
4454 | * Set the child process's PR_ASYNC flag. | |
4455 | */ | |
4456 | #ifdef PR_ASYNC | |
4457 | if (!proc_set_async (pi)) | |
4458 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4459 | #endif | |
4460 | #if 0 | |
4461 | proc_iterate_over_threads (pi, | |
4462 | make_signal_thread_runnable, | |
4463 | NULL); | |
4464 | #endif | |
4465 | pi = thread; /* substitute the thread's procinfo for run */ | |
4466 | } | |
c906108c SS |
4467 | } |
4468 | } | |
c906108c | 4469 | |
c3f6f71d | 4470 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4471 | { |
c3f6f71d JM |
4472 | if (errno == EBUSY) |
4473 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4474 | else | |
4475 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4476 | } |
c3f6f71d | 4477 | } |
c906108c | 4478 | |
c3f6f71d JM |
4479 | /* |
4480 | * Function: register_gdb_signals | |
4481 | * | |
4482 | * Traverse the list of signals that GDB knows about | |
4483 | * (see "handle" command), and arrange for the target | |
4484 | * to be stopped or not, according to these settings. | |
4485 | * | |
4486 | * Returns non-zero for success, zero for failure. | |
4487 | */ | |
c906108c | 4488 | |
c3f6f71d | 4489 | static int |
37de36c6 | 4490 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4491 | { |
4492 | int signo; | |
c906108c | 4493 | |
c3f6f71d JM |
4494 | for (signo = 0; signo < NSIG; signo ++) |
4495 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4496 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4497 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4498 | prdelset (signals, signo); | |
4499 | else | |
4500 | praddset (signals, signo); | |
c906108c | 4501 | |
c3f6f71d | 4502 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4503 | } |
4504 | ||
4505 | /* | |
c3f6f71d JM |
4506 | * Function: target_notice_signals |
4507 | * | |
4508 | * Set up to trace signals in the child process. | |
4509 | */ | |
c906108c | 4510 | |
c3f6f71d | 4511 | static void |
39f77062 | 4512 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4513 | { |
37de36c6 | 4514 | gdb_sigset_t signals; |
39f77062 | 4515 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4516 | |
c3f6f71d JM |
4517 | if (proc_get_traced_signals (pi, &signals) && |
4518 | register_gdb_signals (pi, &signals)) | |
4519 | return; | |
4520 | else | |
4521 | proc_error (pi, "notice_signals", __LINE__); | |
4522 | } | |
c906108c | 4523 | |
c3f6f71d JM |
4524 | /* |
4525 | * Function: target_files_info | |
4526 | * | |
4527 | * Print status information about the child process. | |
4528 | */ | |
c906108c | 4529 | |
c3f6f71d | 4530 | static void |
fba45db2 | 4531 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d JM |
4532 | { |
4533 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4534 | attach_flag? "attached": "child", | |
39f77062 | 4535 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4536 | } |
c906108c | 4537 | |
c3f6f71d JM |
4538 | /* |
4539 | * Function: target_open | |
4540 | * | |
4541 | * A dummy: you don't open procfs. | |
c906108c SS |
4542 | */ |
4543 | ||
4544 | static void | |
fba45db2 | 4545 | procfs_open (char *args, int from_tty) |
c906108c | 4546 | { |
c3f6f71d JM |
4547 | error ("Use the \"run\" command to start a Unix child process."); |
4548 | } | |
c906108c | 4549 | |
c3f6f71d JM |
4550 | /* |
4551 | * Function: target_can_run | |
4552 | * | |
4553 | * This tells GDB that this target vector can be invoked | |
4554 | * for "run" or "attach". | |
4555 | */ | |
c906108c | 4556 | |
c3f6f71d JM |
4557 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4558 | be a runnable target. Used by targets | |
4559 | that can sit atop procfs, such as solaris | |
4560 | thread support. */ | |
c906108c | 4561 | |
c906108c | 4562 | |
c3f6f71d | 4563 | static int |
fba45db2 | 4564 | procfs_can_run (void) |
c3f6f71d JM |
4565 | { |
4566 | /* This variable is controlled by modules that sit atop procfs that | |
4567 | may layer their own process structure atop that provided here. | |
4568 | sol-thread.c does this because of the Solaris two-level thread | |
4569 | model. */ | |
4570 | ||
4571 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4572 | |
c3f6f71d JM |
4573 | return !procfs_suppress_run; |
4574 | } | |
c906108c | 4575 | |
c3f6f71d JM |
4576 | /* |
4577 | * Function: target_stop | |
4578 | * | |
4579 | * Stop the child process asynchronously, as when the | |
4580 | * gdb user types control-c or presses a "stop" button. | |
4581 | * | |
4582 | * Works by sending kill(SIGINT) to the child's process group. | |
4583 | */ | |
c906108c | 4584 | |
c3f6f71d | 4585 | static void |
fba45db2 | 4586 | procfs_stop (void) |
c3f6f71d JM |
4587 | { |
4588 | extern pid_t inferior_process_group; | |
c906108c | 4589 | |
c3f6f71d | 4590 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4591 | } |
4592 | ||
c906108c | 4593 | /* |
c3f6f71d JM |
4594 | * Function: unconditionally_kill_inferior |
4595 | * | |
4596 | * Make it die. Wait for it to die. Clean up after it. | |
4597 | * Note: this should only be applied to the real process, | |
4598 | * not to an LWP, because of the check for parent-process. | |
4599 | * If we need this to work for an LWP, it needs some more logic. | |
4600 | */ | |
c906108c | 4601 | |
c3f6f71d | 4602 | static void |
fba45db2 | 4603 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4604 | { |
4605 | int parent_pid; | |
c906108c | 4606 | |
c3f6f71d JM |
4607 | parent_pid = proc_parent_pid (pi); |
4608 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4609 | /* FIXME: use access functions */ | |
4610 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4611 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4612 | file for the inferior. */ | |
4613 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4614 | { | |
4615 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4616 | } | |
4617 | #endif | |
4618 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4619 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4620 | to kill the inferior, otherwise it might remain stopped with a | |
4621 | pending SIGKILL. | |
4622 | We do not check the result of the PIOCSSIG, the inferior might have | |
4623 | died already. */ | |
4624 | { | |
37de36c6 | 4625 | gdb_siginfo_t newsiginfo; |
c906108c | 4626 | |
c3f6f71d JM |
4627 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4628 | newsiginfo.si_signo = SIGKILL; | |
4629 | newsiginfo.si_code = 0; | |
4630 | newsiginfo.si_errno = 0; | |
4631 | newsiginfo.si_pid = getpid (); | |
4632 | newsiginfo.si_uid = getuid (); | |
4633 | /* FIXME: use proc_set_current_signal */ | |
4634 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4635 | } | |
4636 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4637 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4638 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4639 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4640 | destroy_procinfo (pi); | |
c906108c | 4641 | |
c3f6f71d JM |
4642 | /* If pi is GDB's child, wait for it to die. */ |
4643 | if (parent_pid == getpid ()) | |
4644 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4645 | Should we check the returned event? */ | |
4646 | { | |
0d06e24b | 4647 | #if 0 |
c3f6f71d | 4648 | int status, ret; |
c906108c | 4649 | |
c3f6f71d JM |
4650 | ret = waitpid (pi->pid, &status, 0); |
4651 | #else | |
4652 | wait (NULL); | |
4653 | #endif | |
4654 | } | |
4655 | } | |
c906108c | 4656 | |
c3f6f71d JM |
4657 | /* |
4658 | * Function: target_kill_inferior | |
4659 | * | |
4660 | * We're done debugging it, and we want it to go away. | |
4661 | * Then we want GDB to forget all about it. | |
c906108c SS |
4662 | */ |
4663 | ||
c3f6f71d | 4664 | static void |
fba45db2 | 4665 | procfs_kill_inferior (void) |
c906108c | 4666 | { |
39f77062 | 4667 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4668 | { |
4669 | /* Find procinfo for main process */ | |
39f77062 | 4670 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4671 | |
c3f6f71d JM |
4672 | if (pi) |
4673 | unconditionally_kill_inferior (pi); | |
4674 | target_mourn_inferior (); | |
c906108c | 4675 | } |
c3f6f71d JM |
4676 | } |
4677 | ||
4678 | /* | |
4679 | * Function: target_mourn_inferior | |
4680 | * | |
4681 | * Forget we ever debugged this thing! | |
4682 | */ | |
c906108c | 4683 | |
c3f6f71d | 4684 | static void |
fba45db2 | 4685 | procfs_mourn_inferior (void) |
c3f6f71d JM |
4686 | { |
4687 | procinfo *pi; | |
c906108c | 4688 | |
39f77062 | 4689 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4690 | { |
4691 | /* Find procinfo for main process */ | |
39f77062 | 4692 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4693 | if (pi) |
4694 | destroy_procinfo (pi); | |
c906108c | 4695 | } |
c3f6f71d JM |
4696 | unpush_target (&procfs_ops); |
4697 | generic_mourn_inferior (); | |
4698 | } | |
c906108c | 4699 | |
c3f6f71d JM |
4700 | /* |
4701 | * Function: init_inferior | |
4702 | * | |
4703 | * When GDB forks to create a runnable inferior process, | |
4704 | * this function is called on the parent side of the fork. | |
4705 | * It's job is to do whatever is necessary to make the child | |
4706 | * ready to be debugged, and then wait for the child to synchronize. | |
4707 | */ | |
c906108c | 4708 | |
c3f6f71d | 4709 | static void |
fba45db2 | 4710 | procfs_init_inferior (int pid) |
c3f6f71d JM |
4711 | { |
4712 | procinfo *pi; | |
37de36c6 | 4713 | gdb_sigset_t signals; |
c3f6f71d | 4714 | int fail; |
c906108c | 4715 | |
c3f6f71d JM |
4716 | /* This routine called on the parent side (GDB side) |
4717 | after GDB forks the inferior. */ | |
c906108c | 4718 | |
c3f6f71d | 4719 | push_target (&procfs_ops); |
c906108c | 4720 | |
c3f6f71d JM |
4721 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4722 | perror ("procfs: out of memory in 'init_inferior'"); | |
4723 | ||
4724 | if (!open_procinfo_files (pi, FD_CTL)) | |
4725 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4726 | ||
4727 | /* | |
4728 | xmalloc // done | |
4729 | open_procinfo_files // done | |
4730 | link list // done | |
4731 | prfillset (trace) | |
4732 | procfs_notice_signals | |
4733 | prfillset (fault) | |
4734 | prdelset (FLTPAGE) | |
4735 | PIOCWSTOP | |
4736 | PIOCSFAULT | |
4737 | */ | |
4738 | ||
4739 | /* If not stopped yet, wait for it to stop. */ | |
4740 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4741 | !(proc_wait_for_stop (pi))) | |
4742 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4743 | ||
4744 | /* Save some of the /proc state to be restored if we detach. */ | |
4745 | /* FIXME: Why? In case another debugger was debugging it? | |
4746 | We're it's parent, for Ghu's sake! */ | |
4747 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4748 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4749 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4750 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4751 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4752 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4753 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4754 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4755 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4756 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4757 | ||
4758 | /* Register to trace selected signals in the child. */ | |
4759 | prfillset (&signals); | |
4760 | if (!register_gdb_signals (pi, &signals)) | |
4761 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4762 | ||
4763 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4764 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4765 | ||
0d06e24b JM |
4766 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4767 | and possibly even turning ON kill-on-last-close at this point. But | |
4768 | I can't make that change without careful testing which I don't have | |
4769 | time to do right now... */ | |
c3f6f71d JM |
4770 | /* Turn on run-on-last-close flag so that the child |
4771 | will die if GDB goes away for some reason. */ | |
4772 | if (!proc_set_run_on_last_close (pi)) | |
4773 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4774 | ||
4775 | /* The 'process ID' we return to GDB is composed of | |
4776 | the actual process ID plus the lwp ID. */ | |
39f77062 | 4777 | inferior_ptid = MERGEPID (pi->pid, proc_get_current_thread (pi)); |
c906108c | 4778 | |
c3f6f71d JM |
4779 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4780 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4781 | #else | |
4782 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4783 | startup_inferior (2); | |
0d06e24b | 4784 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4785 | } |
c906108c | 4786 | |
c3f6f71d JM |
4787 | /* |
4788 | * Function: set_exec_trap | |
4789 | * | |
4790 | * When GDB forks to create a new process, this function is called | |
4791 | * on the child side of the fork before GDB exec's the user program. | |
4792 | * Its job is to make the child minimally debuggable, so that the | |
4793 | * parent GDB process can connect to the child and take over. | |
4794 | * This function should do only the minimum to make that possible, | |
4795 | * and to synchronize with the parent process. The parent process | |
4796 | * should take care of the details. | |
4797 | */ | |
4798 | ||
4799 | static void | |
fba45db2 | 4800 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4801 | { |
4802 | /* This routine called on the child side (inferior side) | |
4803 | after GDB forks the inferior. It must use only local variables, | |
4804 | because it may be sharing data space with its parent. */ | |
c906108c | 4805 | |
c3f6f71d | 4806 | procinfo *pi; |
37de36c6 | 4807 | sysset_t *exitset; |
c906108c | 4808 | |
c3f6f71d JM |
4809 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4810 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4811 | |
c3f6f71d JM |
4812 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4813 | { | |
4814 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4815 | gdb_flush (gdb_stderr); | |
4816 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4817 | _exit (127); | |
4818 | } | |
c906108c | 4819 | |
c3f6f71d JM |
4820 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4821 | /* OSF method for tracing exec syscalls. Quoting: | |
4822 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4823 | exits from exec system calls because of the user level loader. */ | |
4824 | /* FIXME: make nice and maybe move into an access function. */ | |
4825 | { | |
4826 | int prfs_flags; | |
c906108c | 4827 | |
c3f6f71d JM |
4828 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4829 | { | |
4830 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4831 | gdb_flush (gdb_stderr); | |
4832 | _exit (127); | |
4833 | } | |
4834 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4835 | |
c3f6f71d JM |
4836 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4837 | { | |
4838 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4839 | gdb_flush (gdb_stderr); | |
4840 | _exit (127); | |
4841 | } | |
4842 | } | |
4843 | #else /* not PRFS_STOPEXEC */ | |
4844 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4845 | /* GW: Rationale... | |
4846 | Not all systems with /proc have all the exec* syscalls with the same | |
4847 | names. On the SGI, for example, there is no SYS_exec, but there | |
4848 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4849 | |
37de36c6 KB |
4850 | exitset = sysset_t_alloc (pi); |
4851 | gdb_premptysysset (exitset); | |
c3f6f71d | 4852 | #ifdef SYS_exec |
37de36c6 | 4853 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4854 | #endif |
4855 | #ifdef SYS_execve | |
37de36c6 | 4856 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4857 | #endif |
4858 | #ifdef SYS_execv | |
37de36c6 | 4859 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4860 | #endif |
37de36c6 KB |
4861 | #ifdef DYNAMIC_SYSCALLS |
4862 | { | |
4863 | int callnum = find_syscall (pi, "execve"); | |
4864 | ||
4865 | if (callnum >= 0) | |
4866 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4867 | |
37de36c6 KB |
4868 | callnum = find_syscall (pi, "ra_execve"); |
4869 | if (callnum >= 0) | |
4870 | gdb_praddsysset (exitset, callnum); | |
4871 | } | |
4872 | #endif /* DYNAMIC_SYSCALLS */ | |
4873 | ||
4874 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4875 | { |
c3f6f71d JM |
4876 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4877 | gdb_flush (gdb_stderr); | |
4878 | _exit (127); | |
c906108c | 4879 | } |
c3f6f71d JM |
4880 | #endif /* PRFS_STOPEXEC */ |
4881 | ||
4882 | /* FIXME: should this be done in the parent instead? */ | |
4883 | /* Turn off inherit on fork flag so that all grand-children | |
4884 | of gdb start with tracing flags cleared. */ | |
4885 | if (!proc_unset_inherit_on_fork (pi)) | |
4886 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4887 | ||
4888 | /* Turn off run on last close flag, so that the child process | |
4889 | cannot run away just because we close our handle on it. | |
4890 | We want it to wait for the parent to attach. */ | |
4891 | if (!proc_unset_run_on_last_close (pi)) | |
4892 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4893 | ||
4894 | /* FIXME: No need to destroy the procinfo -- | |
4895 | we have our own address space, and we're about to do an exec! */ | |
4896 | /*destroy_procinfo (pi);*/ | |
c906108c | 4897 | } |
c906108c | 4898 | |
c3f6f71d JM |
4899 | /* |
4900 | * Function: create_inferior | |
4901 | * | |
4902 | * This function is called BEFORE gdb forks the inferior process. | |
4903 | * Its only real responsibility is to set things up for the fork, | |
4904 | * and tell GDB which two functions to call after the fork (one | |
4905 | * for the parent, and one for the child). | |
4906 | * | |
4907 | * This function does a complicated search for a unix shell program, | |
4908 | * which it then uses to parse arguments and environment variables | |
4909 | * to be sent to the child. I wonder whether this code could not | |
4910 | * be abstracted out and shared with other unix targets such as | |
4911 | * infptrace? | |
4912 | */ | |
c906108c SS |
4913 | |
4914 | static void | |
fba45db2 | 4915 | procfs_create_inferior (char *exec_file, char *allargs, char **env) |
c906108c SS |
4916 | { |
4917 | char *shell_file = getenv ("SHELL"); | |
4918 | char *tryname; | |
4919 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4920 | { | |
4921 | ||
4922 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4923 | just do this the normal way (via execlp, which operates by |
4924 | attempting an exec for each element of the PATH until it | |
4925 | finds one which succeeds), then there will be an exec for | |
4926 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4927 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4928 | for these failed execs with the ones for successful execs | |
4929 | (whether the exec has succeeded is stored at that time in the | |
4930 | carry bit or some such architecture-specific and | |
4931 | non-ABI-specified place). | |
4932 | ||
4933 | So I can't think of anything better than to search the PATH | |
4934 | now. This has several disadvantages: (1) There is a race | |
4935 | condition; if we find a file now and it is deleted before we | |
4936 | exec it, we lose, even if the deletion leaves a valid file | |
4937 | further down in the PATH, (2) there is no way to know exactly | |
4938 | what an executable (in the sense of "capable of being | |
4939 | exec'd") file is. Using access() loses because it may lose | |
4940 | if the caller is the superuser; failing to use it loses if | |
4941 | there are ACLs or some such. */ | |
c906108c SS |
4942 | |
4943 | char *p; | |
4944 | char *p1; | |
4945 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4946 | path is used from within GDB. */ |
c906108c SS |
4947 | char *path = getenv ("PATH"); |
4948 | int len; | |
4949 | struct stat statbuf; | |
4950 | ||
4951 | if (path == NULL) | |
4952 | path = "/bin:/usr/bin"; | |
4953 | ||
4954 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4955 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4956 | { |
4957 | p1 = strchr (p, ':'); | |
4958 | if (p1 != NULL) | |
4959 | len = p1 - p; | |
4960 | else | |
4961 | len = strlen (p); | |
4962 | strncpy (tryname, p, len); | |
4963 | tryname[len] = '\0'; | |
4964 | strcat (tryname, "/"); | |
4965 | strcat (tryname, shell_file); | |
4966 | if (access (tryname, X_OK) < 0) | |
4967 | continue; | |
4968 | if (stat (tryname, &statbuf) < 0) | |
4969 | continue; | |
4970 | if (!S_ISREG (statbuf.st_mode)) | |
4971 | /* We certainly need to reject directories. I'm not quite | |
4972 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4973 | that people want to exec() these things. */ | |
4974 | continue; | |
4975 | break; | |
4976 | } | |
4977 | if (p == NULL) | |
4978 | /* Not found. This must be an error rather than merely passing | |
4979 | the file to execlp(), because execlp() would try all the | |
4980 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
4981 | error ("procfs:%d -- Can't find shell %s in PATH", |
4982 | __LINE__, shell_file); | |
c906108c SS |
4983 | |
4984 | shell_file = tryname; | |
4985 | } | |
4986 | ||
c3f6f71d JM |
4987 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4988 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
4989 | |
4990 | /* We are at the first instruction we care about. */ | |
4991 | /* Pedal to the metal... */ | |
4992 | ||
2acceee2 | 4993 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
4994 | } |
4995 | ||
c3f6f71d JM |
4996 | /* |
4997 | * Function: notice_thread | |
4998 | * | |
4999 | * Callback for find_new_threads. | |
5000 | * Calls "add_thread". | |
5001 | */ | |
c906108c | 5002 | |
c3f6f71d | 5003 | static int |
fba45db2 | 5004 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5005 | { |
39f77062 | 5006 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5007 | |
c3f6f71d JM |
5008 | if (!in_thread_list (gdb_threadid)) |
5009 | add_thread (gdb_threadid); | |
c906108c | 5010 | |
c3f6f71d JM |
5011 | return 0; |
5012 | } | |
5013 | ||
5014 | /* | |
5015 | * Function: target_find_new_threads | |
5016 | * | |
5017 | * Query all the threads that the target knows about, | |
5018 | * and give them back to GDB to add to its list. | |
5019 | */ | |
5020 | ||
5021 | void | |
fba45db2 | 5022 | procfs_find_new_threads (void) |
c3f6f71d JM |
5023 | { |
5024 | procinfo *pi; | |
5025 | ||
5026 | /* Find procinfo for main process */ | |
39f77062 | 5027 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5028 | proc_update_threads (pi); |
5029 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5030 | } |
5031 | ||
c3f6f71d JM |
5032 | /* |
5033 | * Function: target_thread_alive | |
5034 | * | |
5035 | * Return true if the thread is still 'alive'. | |
5036 | * | |
5037 | * This guy doesn't really seem to be doing his job. | |
5038 | * Got to investigate how to tell when a thread is really gone. | |
5039 | */ | |
c906108c | 5040 | |
c906108c | 5041 | static int |
39f77062 | 5042 | procfs_thread_alive (ptid_t ptid) |
c906108c | 5043 | { |
c3f6f71d JM |
5044 | int proc, thread; |
5045 | procinfo *pi; | |
c906108c | 5046 | |
39f77062 KB |
5047 | proc = PIDGET (ptid); |
5048 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5049 | /* If I don't know it, it ain't alive! */ |
5050 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5051 | return 0; | |
5052 | ||
5053 | /* If I can't get its status, it ain't alive! | |
5054 | What's more, I need to forget about it! */ | |
5055 | if (!proc_get_status (pi)) | |
5056 | { | |
5057 | destroy_procinfo (pi); | |
5058 | return 0; | |
5059 | } | |
5060 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5061 | return 1; | |
c906108c | 5062 | } |
c3f6f71d JM |
5063 | |
5064 | /* | |
5065 | * Function: target_pid_to_str | |
5066 | * | |
5067 | * Return a string to be used to identify the thread in | |
5068 | * the "info threads" display. | |
5069 | */ | |
5070 | ||
5071 | char * | |
39f77062 | 5072 | procfs_pid_to_str (ptid_t ptid) |
c3f6f71d JM |
5073 | { |
5074 | static char buf[80]; | |
5075 | int proc, thread; | |
5076 | procinfo *pi; | |
5077 | ||
39f77062 KB |
5078 | proc = PIDGET (ptid); |
5079 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5080 | pi = find_procinfo (proc, thread); |
5081 | ||
5082 | if (thread == 0) | |
5083 | sprintf (buf, "Process %d", proc); | |
5084 | else | |
5085 | sprintf (buf, "LWP %d", thread); | |
5086 | return &buf[0]; | |
5087 | } | |
5088 | ||
5089 | /* | |
5090 | * Function: procfs_set_watchpoint | |
5091 | * Insert a watchpoint | |
5092 | */ | |
5093 | ||
5094 | int | |
39f77062 KB |
5095 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
5096 | int after) | |
c906108c | 5097 | { |
c3f6f71d | 5098 | #ifndef UNIXWARE |
37de36c6 | 5099 | #ifndef AIX5 |
c3f6f71d JM |
5100 | int pflags = 0; |
5101 | procinfo *pi; | |
5102 | ||
39f77062 KB |
5103 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
5104 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); | |
c3f6f71d JM |
5105 | |
5106 | /* Translate from GDB's flags to /proc's */ | |
5107 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5108 | { |
c3f6f71d JM |
5109 | switch (rwflag) { /* FIXME: need an enum! */ |
5110 | case hw_write: /* default watchpoint (write) */ | |
5111 | pflags = WRITE_WATCHFLAG; | |
5112 | break; | |
5113 | case hw_read: /* read watchpoint */ | |
5114 | pflags = READ_WATCHFLAG; | |
5115 | break; | |
5116 | case hw_access: /* access watchpoint */ | |
5117 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5118 | break; | |
5119 | case hw_execute: /* execution HW breakpoint */ | |
5120 | pflags = EXEC_WATCHFLAG; | |
5121 | break; | |
5122 | default: /* Something weird. Return error. */ | |
c906108c | 5123 | return -1; |
c3f6f71d JM |
5124 | } |
5125 | if (after) /* Stop after r/w access is completed. */ | |
5126 | pflags |= AFTER_WATCHFLAG; | |
5127 | } | |
5128 | ||
5129 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5130 | { | |
5131 | if (errno == E2BIG) /* Typical error for no resources */ | |
5132 | return -1; /* fail */ | |
5133 | /* GDB may try to remove the same watchpoint twice. | |
5134 | If a remove request returns no match, don't error. */ | |
c906108c | 5135 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5136 | return 0; /* ignore */ |
5137 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5138 | } |
37de36c6 KB |
5139 | #endif /* AIX5 */ |
5140 | #endif /* UNIXWARE */ | |
c906108c SS |
5141 | return 0; |
5142 | } | |
5143 | ||
1e03ad20 KB |
5144 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5145 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5146 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5147 | far. | |
5148 | ||
5149 | Note: procfs_can_use_hw_breakpoint() is not yet used by all | |
5150 | procfs.c targets due to the fact that some of them still define | |
5151 | TARGET_CAN_USE_HARDWARE_WATCHPOINT. */ | |
5152 | ||
5153 | static int | |
5154 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5155 | { | |
5156 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS | |
5157 | return 0; | |
5158 | #else | |
5159 | /* Due to the way that proc_set_watchpoint() is implemented, host | |
5160 | and target pointers must be of the same size. If they are not, | |
5161 | we can't use hardware watchpoints. This limitation is due to the | |
5162 | fact that proc_set_watchpoint() calls address_to_host_pointer(); | |
5163 | a close inspection of address_to_host_pointer will reveal that | |
5164 | an internal error will be generated when the host and target | |
5165 | pointer sizes are different. */ | |
5166 | if (sizeof (void *) != TYPE_LENGTH (builtin_type_void_data_ptr)) | |
5167 | return 0; | |
5168 | ||
5169 | /* Other tests here??? */ | |
5170 | ||
5171 | return 1; | |
5172 | #endif | |
5173 | } | |
5174 | ||
c3f6f71d JM |
5175 | /* |
5176 | * Function: stopped_by_watchpoint | |
5177 | * | |
5178 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5179 | * else returns zero. | |
5180 | */ | |
5181 | ||
c906108c | 5182 | int |
39f77062 | 5183 | procfs_stopped_by_watchpoint (ptid_t ptid) |
c906108c | 5184 | { |
c3f6f71d | 5185 | procinfo *pi; |
c906108c | 5186 | |
39f77062 KB |
5187 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
5188 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); | |
aaeb7efa MS |
5189 | |
5190 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5191 | return 0; | |
5192 | ||
c3f6f71d | 5193 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5194 | { |
c3f6f71d JM |
5195 | if (proc_why (pi) == PR_FAULTED) |
5196 | { | |
c906108c | 5197 | #ifdef FLTWATCH |
c3f6f71d JM |
5198 | if (proc_what (pi) == FLTWATCH) |
5199 | return 1; | |
c906108c SS |
5200 | #endif |
5201 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5202 | if (proc_what (pi) == FLTKWATCH) |
5203 | return 1; | |
c906108c | 5204 | #endif |
c3f6f71d | 5205 | } |
c906108c SS |
5206 | } |
5207 | return 0; | |
5208 | } | |
c906108c | 5209 | |
c3f6f71d JM |
5210 | #ifdef TM_I386SOL2_H |
5211 | /* | |
5212 | * Function: procfs_find_LDT_entry | |
5213 | * | |
5214 | * Input: | |
39f77062 | 5215 | * ptid_t ptid; // The GDB-style pid-plus-LWP. |
c3f6f71d JM |
5216 | * |
5217 | * Return: | |
5218 | * pointer to the corresponding LDT entry. | |
5219 | */ | |
c906108c | 5220 | |
c3f6f71d | 5221 | struct ssd * |
39f77062 | 5222 | procfs_find_LDT_entry (ptid_t ptid) |
c906108c | 5223 | { |
c3f6f71d JM |
5224 | gdb_gregset_t *gregs; |
5225 | int key; | |
5226 | procinfo *pi; | |
c906108c | 5227 | |
c3f6f71d | 5228 | /* Find procinfo for the lwp. */ |
39f77062 | 5229 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) |
c906108c | 5230 | { |
39f77062 KB |
5231 | warning ("procfs_find_LDT_entry: could not find procinfo for %d:%d.", |
5232 | PIDGET (ptid), TIDGET (ptid)); | |
c3f6f71d | 5233 | return NULL; |
c906108c | 5234 | } |
c3f6f71d JM |
5235 | /* get its general registers. */ |
5236 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
5237 | { | |
39f77062 KB |
5238 | warning ("procfs_find_LDT_entry: could not read gregs for %d:%d.", |
5239 | PIDGET (ptid), TIDGET (ptid)); | |
c3f6f71d JM |
5240 | return NULL; |
5241 | } | |
5242 | /* Now extract the GS register's lower 16 bits. */ | |
5243 | key = (*gregs)[GS] & 0xffff; | |
5244 | ||
5245 | /* Find the matching entry and return it. */ | |
5246 | return proc_get_LDT_entry (pi, key); | |
c906108c | 5247 | } |
c3f6f71d | 5248 | #endif /* TM_I386SOL2_H */ |
c906108c | 5249 | |
831e682e MS |
5250 | /* |
5251 | * Memory Mappings Functions: | |
5252 | */ | |
5253 | ||
5254 | /* | |
5255 | * Function: iterate_over_mappings | |
5256 | * | |
5257 | * Call a callback function once for each mapping, passing it the mapping, | |
5258 | * an optional secondary callback function, and some optional opaque data. | |
5259 | * Quit and return the first non-zero value returned from the callback. | |
5260 | * | |
5261 | * Arguments: | |
5262 | * pi -- procinfo struct for the process to be mapped. | |
5263 | * func -- callback function to be called by this iterator. | |
5264 | * data -- optional opaque data to be passed to the callback function. | |
5265 | * child_func -- optional secondary function pointer to be passed | |
5266 | * to the child function. | |
5267 | * | |
5268 | * Return: First non-zero return value from the callback function, | |
5269 | * or zero. | |
5270 | */ | |
5271 | ||
5272 | static int | |
5273 | iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data, | |
5274 | int (*func) (struct prmap *map, | |
5275 | int (*child_func) (), | |
5276 | void *data)) | |
5277 | { | |
5278 | char pathname[MAX_PROC_NAME_SIZE]; | |
5279 | struct prmap *prmaps; | |
5280 | struct prmap *prmap; | |
5281 | int funcstat; | |
5282 | int map_fd; | |
5283 | int nmap; | |
5284 | #ifdef NEW_PROC_API | |
5285 | struct stat sbuf; | |
5286 | #endif | |
5287 | ||
5288 | /* Get the number of mappings, allocate space, | |
5289 | and read the mappings into prmaps. */ | |
5290 | #ifdef NEW_PROC_API | |
5291 | /* Open map fd. */ | |
5292 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5293 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5294 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5295 | ||
5296 | /* Make sure it gets closed again. */ | |
5297 | make_cleanup_close (map_fd); | |
5298 | ||
5299 | /* Use stat to determine the file size, and compute | |
5300 | the number of prmap_t objects it contains. */ | |
5301 | if (fstat (map_fd, &sbuf) != 0) | |
5302 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5303 | ||
5304 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5305 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5306 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5307 | != (nmap * sizeof (*prmaps))) | |
5308 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5309 | #else | |
5310 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5311 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5312 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5313 | ||
5314 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5315 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5316 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5317 | #endif | |
5318 | ||
5319 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5320 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5321 | return funcstat; | |
5322 | ||
5323 | return 0; | |
5324 | } | |
5325 | ||
5326 | /* | |
5327 | * Function: solib_mappings_callback | |
5328 | * | |
5329 | * Calls the supplied callback function once for each mapped address | |
5330 | * space in the process. The callback function receives an open | |
5331 | * file descriptor for the file corresponding to that mapped | |
5332 | * address space (if there is one), and the base address of the | |
5333 | * mapped space. Quit when the callback function returns a | |
5334 | * nonzero value, or at teh end of the mappings. | |
5335 | * | |
5336 | * Returns: the first non-zero return value of the callback function, | |
5337 | * or zero. | |
5338 | */ | |
5339 | ||
5340 | int solib_mappings_callback (struct prmap *map, | |
5341 | int (*func) (int, CORE_ADDR), | |
5342 | void *data) | |
5343 | { | |
5344 | procinfo *pi = data; | |
5345 | int fd; | |
5346 | ||
5347 | #ifdef NEW_PROC_API | |
5348 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
5349 | ||
5350 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
5351 | return -1; /* sanity */ | |
5352 | ||
5353 | if (map->pr_mapname[0] == 0) | |
5354 | { | |
5355 | fd = -1; /* no map file */ | |
5356 | } | |
5357 | else | |
5358 | { | |
5359 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
5360 | /* Note: caller's responsibility to close this fd! */ | |
5361 | fd = open_with_retry (name, O_RDONLY); | |
5362 | /* Note: we don't test the above call for failure; | |
5363 | we just pass the FD on as given. Sometimes there is | |
5364 | no file, so the open may return failure, but that's | |
5365 | not a problem. */ | |
5366 | } | |
5367 | #else | |
5368 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
5369 | /* Note: we don't test the above call for failure; | |
5370 | we just pass the FD on as given. Sometimes there is | |
5371 | no file, so the ioctl may return failure, but that's | |
5372 | not a problem. */ | |
5373 | #endif | |
5374 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
5375 | } | |
5376 | ||
5377 | /* | |
5378 | * Function: proc_iterate_over_mappings | |
5379 | * | |
5380 | * Uses the unified "iterate_over_mappings" function | |
5381 | * to implement the exported interface to solib-svr4.c. | |
5382 | * | |
5383 | * Given a pointer to a function, call that function once for every | |
5384 | * mapped address space in the process. The callback function | |
5385 | * receives an open file descriptor for the file corresponding to | |
5386 | * that mapped address space (if there is one), and the base address | |
5387 | * of the mapped space. Quit when the callback function returns a | |
5388 | * nonzero value, or at teh end of the mappings. | |
5389 | * | |
5390 | * Returns: the first non-zero return value of the callback function, | |
5391 | * or zero. | |
5392 | */ | |
5393 | ||
5394 | int | |
5395 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) | |
5396 | { | |
5397 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5398 | ||
5399 | return iterate_over_mappings (pi, func, pi, solib_mappings_callback); | |
5400 | } | |
5401 | ||
be4d1333 MS |
5402 | /* |
5403 | * Function: find_memory_regions_callback | |
5404 | * | |
5405 | * Implements the to_find_memory_regions method. | |
5406 | * Calls an external function for each memory region. | |
5407 | * External function will have the signiture: | |
5408 | * | |
5409 | * int callback (CORE_ADDR vaddr, | |
5410 | * unsigned long size, | |
5411 | * int read, int write, int execute, | |
5412 | * void *data); | |
5413 | * | |
5414 | * Returns the integer value returned by the callback. | |
5415 | */ | |
5416 | ||
5417 | static int | |
5418 | find_memory_regions_callback (struct prmap *map, | |
5419 | int (*func) (CORE_ADDR, | |
5420 | unsigned long, | |
5421 | int, int, int, | |
5422 | void *), | |
5423 | void *data) | |
5424 | { | |
6dbdc4a3 | 5425 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
be4d1333 MS |
5426 | map->pr_size, |
5427 | (map->pr_mflags & MA_READ) != 0, | |
5428 | (map->pr_mflags & MA_WRITE) != 0, | |
5429 | (map->pr_mflags & MA_EXEC) != 0, | |
5430 | data); | |
5431 | } | |
5432 | ||
5433 | /* | |
5434 | * Function: proc_find_memory_regions | |
5435 | * | |
5436 | * External interface. Calls a callback function once for each | |
5437 | * mapped memory region in the child process, passing as arguments | |
5438 | * CORE_ADDR virtual_address, | |
5439 | * unsigned long size, | |
5440 | * int read, TRUE if region is readable by the child | |
5441 | * int write, TRUE if region is writable by the child | |
5442 | * int execute TRUE if region is executable by the child. | |
5443 | * | |
5444 | * Stops iterating and returns the first non-zero value | |
5445 | * returned by the callback. | |
5446 | */ | |
5447 | ||
5448 | static int | |
5449 | proc_find_memory_regions (int (*func) (CORE_ADDR, | |
5450 | unsigned long, | |
5451 | int, int, int, | |
5452 | void *), | |
5453 | void *data) | |
5454 | { | |
5455 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5456 | ||
5457 | return iterate_over_mappings (pi, func, data, | |
5458 | find_memory_regions_callback); | |
5459 | } | |
5460 | ||
388faa48 MS |
5461 | /* |
5462 | * Function: mappingflags | |
5463 | * | |
5464 | * Returns an ascii representation of a memory mapping's flags. | |
5465 | */ | |
c3f6f71d | 5466 | |
388faa48 | 5467 | static char * |
5ae5f592 | 5468 | mappingflags (long flags) |
388faa48 MS |
5469 | { |
5470 | static char asciiflags[8]; | |
5471 | ||
5472 | strcpy (asciiflags, "-------"); | |
5473 | #if defined (MA_PHYS) | |
5474 | if (flags & MA_PHYS) | |
5475 | asciiflags[0] = 'd'; | |
5476 | #endif | |
5477 | if (flags & MA_STACK) | |
5478 | asciiflags[1] = 's'; | |
5479 | if (flags & MA_BREAK) | |
5480 | asciiflags[2] = 'b'; | |
5481 | if (flags & MA_SHARED) | |
5482 | asciiflags[3] = 's'; | |
5483 | if (flags & MA_READ) | |
5484 | asciiflags[4] = 'r'; | |
5485 | if (flags & MA_WRITE) | |
5486 | asciiflags[5] = 'w'; | |
5487 | if (flags & MA_EXEC) | |
5488 | asciiflags[6] = 'x'; | |
5489 | return (asciiflags); | |
5490 | } | |
5491 | ||
831e682e MS |
5492 | /* |
5493 | * Function: info_mappings_callback | |
5494 | * | |
5495 | * Callback function, does the actual work for 'info proc mappings'. | |
5496 | */ | |
5497 | ||
5498 | /* ARGSUSED */ | |
5499 | static int | |
5500 | info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused) | |
5501 | { | |
5502 | char *data_fmt_string; | |
5503 | ||
5504 | if (TARGET_ADDR_BIT == 32) | |
5505 | data_fmt_string = "\t%#10lx %#10lx %#10x %#10x %7s\n"; | |
5506 | else | |
5507 | data_fmt_string = " %#18lx %#18lx %#10x %#10x %7s\n"; | |
5508 | ||
5509 | printf_filtered (data_fmt_string, | |
5510 | (unsigned long) map->pr_vaddr, | |
5511 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
5512 | map->pr_size, | |
5513 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ | |
5514 | (unsigned int) map->pr_offset, | |
5515 | #else | |
5516 | map->pr_off, | |
5517 | #endif | |
5518 | mappingflags (map->pr_mflags)); | |
5519 | ||
5520 | return 0; | |
5521 | } | |
5522 | ||
388faa48 MS |
5523 | /* |
5524 | * Function: info_proc_mappings | |
5525 | * | |
5526 | * Implement the "info proc mappings" subcommand. | |
5527 | */ | |
5528 | ||
5529 | static void | |
5530 | info_proc_mappings (procinfo *pi, int summary) | |
5531 | { | |
831e682e | 5532 | char *header_fmt_string; |
388faa48 MS |
5533 | |
5534 | if (TARGET_PTR_BIT == 32) | |
831e682e | 5535 | header_fmt_string = "\t%10s %10s %10s %10s %7s\n"; |
388faa48 | 5536 | else |
831e682e | 5537 | header_fmt_string = " %18s %18s %10s %10s %7s\n"; |
388faa48 MS |
5538 | |
5539 | if (summary) | |
5540 | return; /* No output for summary mode. */ | |
5541 | ||
388faa48 MS |
5542 | printf_filtered ("Mapped address spaces:\n\n"); |
5543 | printf_filtered (header_fmt_string, | |
5544 | "Start Addr", | |
5545 | " End Addr", | |
5546 | " Size", | |
5547 | " Offset", | |
5548 | "Flags"); | |
5549 | ||
831e682e | 5550 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5551 | printf_filtered ("\n"); |
5552 | } | |
5553 | ||
5554 | /* | |
5555 | * Function: info_proc_cmd | |
5556 | * | |
5557 | * Implement the "info proc" command. | |
5558 | */ | |
c3f6f71d JM |
5559 | |
5560 | static void | |
fba45db2 | 5561 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5562 | { |
c3f6f71d | 5563 | struct cleanup *old_chain; |
388faa48 MS |
5564 | procinfo *process = NULL; |
5565 | procinfo *thread = NULL; | |
5566 | char **argv = NULL; | |
5567 | char *tmp = NULL; | |
5568 | int pid = 0; | |
5569 | int tid = 0; | |
5570 | int mappings = 0; | |
c906108c | 5571 | |
c3f6f71d JM |
5572 | old_chain = make_cleanup (null_cleanup, 0); |
5573 | if (args) | |
0fda6bd2 JM |
5574 | { |
5575 | if ((argv = buildargv (args)) == NULL) | |
5576 | nomem (0); | |
5577 | else | |
004527cb | 5578 | make_cleanup_freeargv (argv); |
0fda6bd2 | 5579 | } |
c3f6f71d JM |
5580 | while (argv != NULL && *argv != NULL) |
5581 | { | |
5582 | if (isdigit (argv[0][0])) | |
5583 | { | |
5584 | pid = strtoul (argv[0], &tmp, 10); | |
5585 | if (*tmp == '/') | |
5586 | tid = strtoul (++tmp, NULL, 10); | |
5587 | } | |
5588 | else if (argv[0][0] == '/') | |
5589 | { | |
5590 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5591 | } | |
388faa48 MS |
5592 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5593 | { | |
5594 | mappings = 1; | |
5595 | } | |
c3f6f71d JM |
5596 | else |
5597 | { | |
5598 | /* [...] */ | |
5599 | } | |
5600 | argv++; | |
5601 | } | |
5602 | if (pid == 0) | |
39f77062 | 5603 | pid = PIDGET (inferior_ptid); |
c3f6f71d JM |
5604 | if (pid == 0) |
5605 | error ("No current process: you must name one."); | |
5606 | else | |
c906108c | 5607 | { |
c3f6f71d JM |
5608 | /* Have pid, will travel. |
5609 | First see if it's a process we're already debugging. */ | |
5610 | process = find_procinfo (pid, 0); | |
5611 | if (process == NULL) | |
5612 | { | |
5613 | /* No. So open a procinfo for it, but | |
5614 | remember to close it again when finished. */ | |
5615 | process = create_procinfo (pid, 0); | |
004527cb | 5616 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5617 | if (!open_procinfo_files (process, FD_CTL)) |
5618 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5619 | } | |
c906108c | 5620 | } |
c3f6f71d JM |
5621 | if (tid != 0) |
5622 | thread = create_procinfo (pid, tid); | |
5623 | ||
5624 | if (process) | |
5625 | { | |
5626 | printf_filtered ("process %d flags:\n", process->pid); | |
5627 | proc_prettyprint_flags (proc_flags (process), 1); | |
5628 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5629 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5630 | if (proc_get_nthreads (process) > 1) | |
5631 | printf_filtered ("Process has %d threads.\n", | |
5632 | proc_get_nthreads (process)); | |
5633 | } | |
5634 | if (thread) | |
5635 | { | |
5636 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5637 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5638 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5639 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5640 | } | |
5641 | ||
388faa48 MS |
5642 | if (mappings) |
5643 | { | |
5644 | info_proc_mappings (process, 0); | |
5645 | } | |
5646 | ||
c3f6f71d | 5647 | do_cleanups (old_chain); |
c906108c SS |
5648 | } |
5649 | ||
c3f6f71d | 5650 | static void |
fba45db2 | 5651 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5652 | { |
c3f6f71d JM |
5653 | procinfo *pi; |
5654 | sysset_t *sysset; | |
5655 | int syscallnum = 0; | |
c906108c | 5656 | |
39f77062 | 5657 | if (PIDGET (inferior_ptid) <= 0) |
c3f6f71d | 5658 | error ("you must be debugging a process to use this command."); |
c906108c | 5659 | |
c3f6f71d JM |
5660 | if (args == NULL || args[0] == 0) |
5661 | error_no_arg ("system call to trace"); | |
5662 | ||
39f77062 | 5663 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5664 | if (isdigit (args[0])) |
5665 | { | |
5666 | syscallnum = atoi (args); | |
5667 | if (entry_or_exit == PR_SYSENTRY) | |
5668 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5669 | else | |
5670 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5671 | |
c3f6f71d JM |
5672 | if (sysset == NULL) |
5673 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5674 | |
c3f6f71d | 5675 | if (mode == FLAG_SET) |
37de36c6 | 5676 | gdb_praddsysset (sysset, syscallnum); |
c3f6f71d | 5677 | else |
37de36c6 | 5678 | gdb_prdelsysset (sysset, syscallnum); |
c906108c | 5679 | |
c3f6f71d JM |
5680 | if (entry_or_exit == PR_SYSENTRY) |
5681 | { | |
5682 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5683 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5684 | } | |
5685 | else | |
5686 | { | |
5687 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5688 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5689 | } | |
5690 | } | |
5691 | } | |
5692 | ||
5693 | static void | |
fba45db2 | 5694 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5695 | { |
c3f6f71d JM |
5696 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5697 | } | |
c906108c | 5698 | |
c3f6f71d | 5699 | static void |
fba45db2 | 5700 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5701 | { |
5702 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5703 | } |
c906108c | 5704 | |
c3f6f71d | 5705 | static void |
fba45db2 | 5706 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5707 | { |
5708 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5709 | } | |
5710 | ||
5711 | static void | |
fba45db2 | 5712 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5713 | { |
c3f6f71d JM |
5714 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5715 | } | |
c906108c | 5716 | |
c906108c | 5717 | |
c906108c | 5718 | void |
fba45db2 | 5719 | _initialize_procfs (void) |
c906108c | 5720 | { |
c906108c SS |
5721 | init_procfs_ops (); |
5722 | add_target (&procfs_ops); | |
c3f6f71d | 5723 | add_info ("proc", info_proc_cmd, |
388faa48 MS |
5724 | "Show /proc process information about any running process.\n\ |
5725 | Specify process id, or use the program being debugged by default.\n\ | |
5726 | Specify keyword 'mappings' for detailed info on memory mappings."); | |
c3f6f71d JM |
5727 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
5728 | "Give a trace of entries into the syscall."); | |
5729 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5730 | "Give a trace of exits from the syscall."); | |
5731 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5732 | "Cancel a trace of entries into the syscall."); | |
5733 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5734 | "Cancel a trace of exits from the syscall."); | |
c3f6f71d JM |
5735 | } |
5736 | ||
5737 | /* =================== END, GDB "MODULE" =================== */ | |
5738 | ||
5739 | ||
5740 | ||
65554fef | 5741 | /* miscellaneous stubs: */ |
c3f6f71d JM |
5742 | /* The following satisfy a few random symbols mostly created by */ |
5743 | /* the solaris threads implementation, which I will chase down */ | |
5744 | /* later. */ | |
5745 | ||
5746 | /* | |
5747 | * Return a pid for which we guarantee | |
5748 | * we will be able to find a 'live' procinfo. | |
5749 | */ | |
5750 | ||
39f77062 | 5751 | ptid_t |
fba45db2 | 5752 | procfs_first_available (void) |
c3f6f71d | 5753 | { |
39f77062 | 5754 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5755 | } |
be4d1333 MS |
5756 | |
5757 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5758 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5759 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5760 | |
5761 | static char * | |
5762 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, | |
5763 | char *note_data, int *note_size) | |
5764 | { | |
5765 | gdb_gregset_t gregs; | |
5766 | gdb_fpregset_t fpregs; | |
5767 | unsigned long merged_pid; | |
5768 | ||
5769 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5770 | ||
5771 | fill_gregset (&gregs, -1); | |
65554fef MS |
5772 | #if defined (UNIXWARE) |
5773 | note_data = (char *) elfcore_write_lwpstatus (obfd, | |
5774 | note_data, | |
5775 | note_size, | |
5776 | merged_pid, | |
5777 | stop_signal, | |
5778 | &gregs); | |
5779 | #else | |
be4d1333 | 5780 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5781 | note_data, |
5782 | note_size, | |
be4d1333 MS |
5783 | merged_pid, |
5784 | stop_signal, | |
65554fef MS |
5785 | &gregs); |
5786 | #endif | |
be4d1333 MS |
5787 | fill_fpregset (&fpregs, -1); |
5788 | note_data = (char *) elfcore_write_prfpreg (obfd, | |
5789 | note_data, | |
5790 | note_size, | |
5791 | &fpregs, | |
5792 | sizeof (fpregs)); | |
5793 | return note_data; | |
5794 | } | |
5795 | ||
5796 | struct procfs_corefile_thread_data { | |
5797 | bfd *obfd; | |
5798 | char *note_data; | |
5799 | int *note_size; | |
5800 | }; | |
5801 | ||
5802 | static int | |
65554fef | 5803 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5804 | { |
5805 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5806 | |
65554fef | 5807 | if (pi != NULL && thread->tid != 0) |
be4d1333 MS |
5808 | { |
5809 | ptid_t saved_ptid = inferior_ptid; | |
65554fef MS |
5810 | inferior_ptid = MERGEPID (pi->pid, thread->tid); |
5811 | args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid, | |
be4d1333 MS |
5812 | args->note_data, |
5813 | args->note_size); | |
5814 | inferior_ptid = saved_ptid; | |
5815 | } | |
5816 | return 0; | |
5817 | } | |
5818 | ||
5819 | static char * | |
5820 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5821 | { | |
5822 | struct cleanup *old_chain; | |
5823 | gdb_gregset_t gregs; | |
5824 | gdb_fpregset_t fpregs; | |
5825 | char fname[16] = {'\0'}; | |
5826 | char psargs[80] = {'\0'}; | |
5827 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5828 | char *note_data = NULL; | |
6dbdc4a3 | 5829 | char *inf_args; |
be4d1333 MS |
5830 | struct procfs_corefile_thread_data thread_args; |
5831 | ||
5832 | if (get_exec_file (0)) | |
5833 | { | |
5834 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
5835 | strncpy (psargs, get_exec_file (0), | |
5836 | sizeof (psargs)); | |
6dbdc4a3 MS |
5837 | |
5838 | inf_args = get_inferior_args (); | |
5839 | if (inf_args && *inf_args && | |
5840 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 MS |
5841 | { |
5842 | strncat (psargs, " ", | |
5843 | sizeof (psargs) - strlen (psargs)); | |
6dbdc4a3 | 5844 | strncat (psargs, inf_args, |
be4d1333 MS |
5845 | sizeof (psargs) - strlen (psargs)); |
5846 | } | |
5847 | } | |
5848 | ||
5849 | note_data = (char *) elfcore_write_prpsinfo (obfd, | |
5850 | note_data, | |
5851 | note_size, | |
5852 | fname, | |
5853 | psargs); | |
5854 | ||
65554fef MS |
5855 | #ifdef UNIXWARE |
5856 | fill_gregset (&gregs, -1); | |
5857 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
5858 | PIDGET (inferior_ptid), | |
5859 | stop_signal, &gregs); | |
5860 | #endif | |
5861 | ||
be4d1333 MS |
5862 | thread_args.obfd = obfd; |
5863 | thread_args.note_data = note_data; | |
5864 | thread_args.note_size = note_size; | |
65554fef MS |
5865 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
5866 | ||
be4d1333 MS |
5867 | if (thread_args.note_data == note_data) |
5868 | { | |
5869 | /* iterate_over_threads didn't come up with any threads; | |
5870 | just use inferior_ptid. */ | |
5871 | note_data = procfs_do_thread_registers (obfd, inferior_ptid, | |
5872 | note_data, note_size); | |
5873 | } | |
5874 | else | |
5875 | { | |
5876 | note_data = thread_args.note_data; | |
5877 | } | |
5878 | ||
5879 | make_cleanup (xfree, note_data); | |
5880 | return note_data; | |
5881 | } | |
65554fef MS |
5882 | #else /* !(Solaris or Unixware) */ |
5883 | static char * | |
5884 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5885 | { | |
5886 | error ("gcore not implemented for this host."); | |
5887 | return NULL; /* lint */ | |
5888 | } | |
5889 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5890 | /* =================== END GCORE .NOTE "MODULE" =================== */ |