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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> | |
df8f7274 | 45 | #include "gdb_assert.h" |
44270758 | 46 | #include "inflow.h" |
0fda6bd2 | 47 | |
c3f6f71d JM |
48 | /* |
49 | * PROCFS.C | |
50 | * | |
51 | * This module provides the interface between GDB and the | |
52 | * /proc file system, which is used on many versions of Unix | |
53 | * as a means for debuggers to control other processes. | |
54 | * Examples of the systems that use this interface are: | |
55 | * Irix | |
56 | * Solaris | |
57 | * OSF | |
58 | * Unixware | |
37de36c6 | 59 | * AIX5 |
c3f6f71d | 60 | * |
65554fef | 61 | * /proc works by imitating a file system: you open a simulated file |
c3f6f71d JM |
62 | * that represents the process you wish to interact with, and |
63 | * perform operations on that "file" in order to examine or change | |
64 | * the state of the other process. | |
65 | * | |
66 | * The most important thing to know about /proc and this module | |
67 | * is that there are two very different interfaces to /proc: | |
68 | * One that uses the ioctl system call, and | |
69 | * another that uses read and write system calls. | |
70 | * This module has to support both /proc interfaces. This means | |
71 | * that there are two different ways of doing every basic operation. | |
72 | * | |
73 | * In order to keep most of the code simple and clean, I have | |
74 | * defined an interface "layer" which hides all these system calls. | |
75 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
76 | * and most or all occurrances of this ifdef should be confined to | |
77 | * this interface layer. | |
c906108c SS |
78 | */ |
79 | ||
80 | ||
c3f6f71d JM |
81 | /* Determine which /proc API we are using: |
82 | The ioctl API defines PIOCSTATUS, while | |
83 | the read/write (multiple fd) API never does. */ | |
c906108c | 84 | |
c3f6f71d | 85 | #ifdef NEW_PROC_API |
c906108c | 86 | #include <sys/types.h> |
4b14d3e4 | 87 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 88 | #endif |
c906108c | 89 | |
c3f6f71d JM |
90 | #include <fcntl.h> /* for O_RDONLY */ |
91 | #include <unistd.h> /* for "X_OK" */ | |
92 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 93 | |
103b3ef5 MS |
94 | /* Note: procfs-utils.h must be included after the above system header |
95 | files, because it redefines various system calls using macros. | |
96 | This may be incompatible with the prototype declarations. */ | |
97 | ||
103b3ef5 MS |
98 | #include "proc-utils.h" |
99 | ||
c60c0f5f MS |
100 | /* Prototypes for supply_gregset etc. */ |
101 | #include "gregset.h" | |
102 | ||
c3f6f71d | 103 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 104 | |
c3f6f71d JM |
105 | /* |
106 | * This module defines the GDB target vector and its methods. | |
107 | */ | |
c906108c | 108 | |
8ab86381 | 109 | static void procfs_open (char *, int); |
a14ed312 KB |
110 | static void procfs_attach (char *, int); |
111 | static void procfs_detach (char *, int); | |
39f77062 | 112 | static void procfs_resume (ptid_t, int, enum target_signal); |
a14ed312 KB |
113 | static int procfs_can_run (void); |
114 | static void procfs_stop (void); | |
115 | static void procfs_files_info (struct target_ops *); | |
116 | static void procfs_fetch_registers (int); | |
117 | static void procfs_store_registers (int); | |
39f77062 | 118 | static void procfs_notice_signals (ptid_t); |
a14ed312 KB |
119 | static void procfs_prepare_to_store (void); |
120 | static void procfs_kill_inferior (void); | |
121 | static void procfs_mourn_inferior (void); | |
122 | static void procfs_create_inferior (char *, char *, char **); | |
39f77062 | 123 | static ptid_t procfs_wait (ptid_t, struct target_waitstatus *); |
043780a1 AC |
124 | static int procfs_xfer_memory (CORE_ADDR, char *, int, int, |
125 | struct mem_attrib *attrib, | |
126 | struct target_ops *); | |
a14ed312 | 127 | |
39f77062 | 128 | static int procfs_thread_alive (ptid_t); |
a14ed312 KB |
129 | |
130 | void procfs_find_new_threads (void); | |
39f77062 | 131 | char *procfs_pid_to_str (ptid_t); |
c3f6f71d | 132 | |
be4d1333 MS |
133 | static int proc_find_memory_regions (int (*) (CORE_ADDR, |
134 | unsigned long, | |
135 | int, int, int, | |
136 | void *), | |
137 | void *); | |
138 | ||
139 | static char * procfs_make_note_section (bfd *, int *); | |
140 | ||
1e03ad20 KB |
141 | static int procfs_can_use_hw_breakpoint (int, int, int); |
142 | ||
c3f6f71d | 143 | struct target_ops procfs_ops; /* the target vector */ |
c906108c | 144 | |
c3f6f71d | 145 | static void |
fba45db2 | 146 | init_procfs_ops (void) |
c3f6f71d | 147 | { |
be4d1333 MS |
148 | procfs_ops.to_shortname = "procfs"; |
149 | procfs_ops.to_longname = "Unix /proc child process"; | |
150 | procfs_ops.to_doc = | |
c3f6f71d | 151 | "Unix /proc child process (started by the \"run\" command)."; |
be4d1333 MS |
152 | procfs_ops.to_open = procfs_open; |
153 | procfs_ops.to_can_run = procfs_can_run; | |
154 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
155 | procfs_ops.to_kill = procfs_kill_inferior; | |
156 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
157 | procfs_ops.to_attach = procfs_attach; | |
158 | procfs_ops.to_detach = procfs_detach; | |
159 | procfs_ops.to_wait = procfs_wait; | |
160 | procfs_ops.to_resume = procfs_resume; | |
161 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
162 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
163 | procfs_ops.to_store_registers = procfs_store_registers; | |
164 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
165 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
166 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
167 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
168 | procfs_ops.to_files_info = procfs_files_info; | |
169 | procfs_ops.to_stop = procfs_stop; | |
170 | ||
171 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
172 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
c3f6f71d | 173 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
be4d1333 | 174 | procfs_ops.to_terminal_ours = terminal_ours; |
a790ad35 | 175 | procfs_ops.to_terminal_save_ours = terminal_save_ours; |
be4d1333 MS |
176 | procfs_ops.to_terminal_info = child_terminal_info; |
177 | ||
178 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
179 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
180 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
181 | ||
182 | procfs_ops.to_has_all_memory = 1; | |
183 | procfs_ops.to_has_memory = 1; | |
184 | procfs_ops.to_has_execution = 1; | |
185 | procfs_ops.to_has_stack = 1; | |
186 | procfs_ops.to_has_registers = 1; | |
187 | procfs_ops.to_stratum = process_stratum; | |
188 | procfs_ops.to_has_thread_control = tc_schedlock; | |
189 | procfs_ops.to_find_memory_regions = proc_find_memory_regions; | |
190 | procfs_ops.to_make_corefile_notes = procfs_make_note_section; | |
1e03ad20 | 191 | procfs_ops.to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
be4d1333 | 192 | procfs_ops.to_magic = OPS_MAGIC; |
c3f6f71d | 193 | } |
c906108c | 194 | |
c3f6f71d JM |
195 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
196 | ||
c3f6f71d JM |
197 | /* |
198 | * World Unification: | |
199 | * | |
200 | * Put any typedefs, defines etc. here that are required for | |
201 | * the unification of code that handles different versions of /proc. | |
202 | */ | |
203 | ||
204 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 205 | #ifdef WA_READ |
c3f6f71d JM |
206 | enum { READ_WATCHFLAG = WA_READ, |
207 | WRITE_WATCHFLAG = WA_WRITE, | |
208 | EXEC_WATCHFLAG = WA_EXEC, | |
209 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
210 | }; | |
211 | #endif | |
212 | #else /* Irix method for watchpoints */ | |
213 | enum { READ_WATCHFLAG = MA_READ, | |
214 | WRITE_WATCHFLAG = MA_WRITE, | |
215 | EXEC_WATCHFLAG = MA_EXEC, | |
216 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
217 | }; | |
218 | #endif | |
219 | ||
37de36c6 KB |
220 | /* gdb_sigset_t */ |
221 | #ifdef HAVE_PR_SIGSET_T | |
222 | typedef pr_sigset_t gdb_sigset_t; | |
223 | #else | |
224 | typedef sigset_t gdb_sigset_t; | |
225 | #endif | |
226 | ||
227 | /* sigaction */ | |
228 | #ifdef HAVE_PR_SIGACTION64_T | |
229 | typedef pr_sigaction64_t gdb_sigaction_t; | |
230 | #else | |
231 | typedef struct sigaction gdb_sigaction_t; | |
232 | #endif | |
233 | ||
234 | /* siginfo */ | |
235 | #ifdef HAVE_PR_SIGINFO64_T | |
236 | typedef pr_siginfo64_t gdb_siginfo_t; | |
237 | #else | |
238 | typedef struct siginfo gdb_siginfo_t; | |
239 | #endif | |
240 | ||
241 | /* gdb_premptysysset */ | |
242 | #ifdef premptysysset | |
243 | #define gdb_premptysysset premptysysset | |
244 | #else | |
245 | #define gdb_premptysysset premptyset | |
246 | #endif | |
247 | ||
248 | /* praddsysset */ | |
249 | #ifdef praddsysset | |
250 | #define gdb_praddsysset praddsysset | |
251 | #else | |
252 | #define gdb_praddsysset praddset | |
253 | #endif | |
254 | ||
255 | /* prdelsysset */ | |
256 | #ifdef prdelsysset | |
257 | #define gdb_prdelsysset prdelsysset | |
258 | #else | |
259 | #define gdb_prdelsysset prdelset | |
260 | #endif | |
261 | ||
262 | /* prissyssetmember */ | |
263 | #ifdef prissyssetmember | |
264 | #define gdb_pr_issyssetmember prissyssetmember | |
265 | #else | |
266 | #define gdb_pr_issyssetmember prismember | |
267 | #endif | |
268 | ||
269 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
270 | as intuitively descriptive as it could be, so we'll define | |
271 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
272 | this writing, this feature is only found on AIX5 systems and | |
273 | basically means that the set of syscalls is not fixed. I.e, | |
274 | there's no nice table that one can #include to get all of the | |
275 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
276 | for each process. We are at least guaranteed that they won't | |
277 | change over the lifetime of the process. But each process could | |
278 | (in theory) have different syscall numbers. | |
279 | */ | |
280 | #ifdef HAVE_PRSYSENT_T | |
281 | #define DYNAMIC_SYSCALLS | |
282 | #endif | |
c3f6f71d JM |
283 | |
284 | ||
285 | ||
286 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
287 | ||
288 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
289 | ||
290 | /* The procinfo struct is a wrapper to hold all the state information | |
291 | concerning a /proc process. There should be exactly one procinfo | |
292 | for each process, and since GDB currently can debug only one | |
293 | process at a time, that means there should be only one procinfo. | |
294 | All of the LWP's of a process can be accessed indirectly thru the | |
295 | single process procinfo. | |
296 | ||
297 | However, against the day when GDB may debug more than one process, | |
298 | this data structure is kept in a list (which for now will hold no | |
299 | more than one member), and many functions will have a pointer to a | |
300 | procinfo as an argument. | |
301 | ||
302 | There will be a separate procinfo structure for use by the (not yet | |
303 | implemented) "info proc" command, so that we can print useful | |
304 | information about any random process without interfering with the | |
305 | inferior's procinfo information. */ | |
306 | ||
307 | #ifdef NEW_PROC_API | |
308 | /* format strings for /proc paths */ | |
309 | # ifndef CTL_PROC_NAME_FMT | |
310 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
311 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
312 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
313 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
314 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
315 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
316 | # endif | |
317 | /* the name of the proc status struct depends on the implementation */ | |
318 | typedef pstatus_t gdb_prstatus_t; | |
319 | typedef lwpstatus_t gdb_lwpstatus_t; | |
320 | #else /* ! NEW_PROC_API */ | |
321 | /* format strings for /proc paths */ | |
322 | # ifndef CTL_PROC_NAME_FMT | |
323 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
324 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
325 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
326 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
327 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
328 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
329 | # endif | |
c906108c | 330 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 331 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
332 | typedef prstatus_t gdb_lwpstatus_t; |
333 | #endif /* NEW_PROC_API */ | |
c906108c | 334 | |
c3f6f71d JM |
335 | typedef struct procinfo { |
336 | struct procinfo *next; | |
337 | int pid; /* Process ID */ | |
338 | int tid; /* Thread/LWP id */ | |
c906108c | 339 | |
c3f6f71d JM |
340 | /* process state */ |
341 | int was_stopped; | |
342 | int ignore_next_sigstop; | |
c906108c | 343 | |
c3f6f71d JM |
344 | /* The following four fd fields may be identical, or may contain |
345 | several different fd's, depending on the version of /proc | |
346 | (old ioctl or new read/write). */ | |
c906108c | 347 | |
c3f6f71d JM |
348 | int ctl_fd; /* File descriptor for /proc control file */ |
349 | /* | |
350 | * The next three file descriptors are actually only needed in the | |
351 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
352 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
353 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
354 | * implementation) filling them with copies of the control fd. | |
355 | */ | |
356 | int status_fd; /* File descriptor for /proc status file */ | |
357 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 358 | |
c3f6f71d | 359 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 360 | |
c3f6f71d | 361 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
362 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
363 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
364 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
365 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 366 | |
c3f6f71d | 367 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 368 | |
c3f6f71d JM |
369 | #ifndef NEW_PROC_API |
370 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 371 | #endif |
37de36c6 KB |
372 | |
373 | #ifdef DYNAMIC_SYSCALLS | |
374 | int num_syscalls; /* Total number of syscalls */ | |
375 | char **syscall_names; /* Syscall number to name map */ | |
376 | #endif | |
c3f6f71d JM |
377 | |
378 | struct procinfo *thread_list; | |
c906108c | 379 | |
c3f6f71d JM |
380 | int status_valid : 1; |
381 | int gregs_valid : 1; | |
382 | int fpregs_valid : 1; | |
383 | int threads_valid: 1; | |
384 | } procinfo; | |
c906108c | 385 | |
c3f6f71d | 386 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 387 | |
c3f6f71d | 388 | /* Function prototypes for procinfo module: */ |
c906108c | 389 | |
a14ed312 KB |
390 | static procinfo *find_procinfo_or_die (int pid, int tid); |
391 | static procinfo *find_procinfo (int pid, int tid); | |
392 | static procinfo *create_procinfo (int pid, int tid); | |
393 | static void destroy_procinfo (procinfo * p); | |
004527cb | 394 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
395 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
396 | static int open_procinfo_files (procinfo * p, int which); | |
397 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
398 | static int sysset_t_size (procinfo *p); |
399 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
400 | #ifdef DYNAMIC_SYSCALLS | |
401 | static void load_syscalls (procinfo *pi); | |
402 | static void free_syscalls (procinfo *pi); | |
403 | static int find_syscall (procinfo *pi, char *name); | |
404 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 405 | |
c3f6f71d JM |
406 | /* The head of the procinfo list: */ |
407 | static procinfo * procinfo_list; | |
c906108c | 408 | |
c3f6f71d JM |
409 | /* |
410 | * Function: find_procinfo | |
411 | * | |
412 | * Search the procinfo list. | |
413 | * | |
414 | * Returns: pointer to procinfo, or NULL if not found. | |
415 | */ | |
c906108c | 416 | |
c3f6f71d | 417 | static procinfo * |
fba45db2 | 418 | find_procinfo (int pid, int tid) |
c5aa993b | 419 | { |
c3f6f71d | 420 | procinfo *pi; |
c906108c | 421 | |
c3f6f71d JM |
422 | for (pi = procinfo_list; pi; pi = pi->next) |
423 | if (pi->pid == pid) | |
424 | break; | |
c906108c | 425 | |
c3f6f71d JM |
426 | if (pi) |
427 | if (tid) | |
428 | { | |
429 | /* Don't check threads_valid. If we're updating the | |
430 | thread_list, we want to find whatever threads are already | |
431 | here. This means that in general it is the caller's | |
432 | responsibility to check threads_valid and update before | |
433 | calling find_procinfo, if the caller wants to find a new | |
434 | thread. */ | |
435 | ||
436 | for (pi = pi->thread_list; pi; pi = pi->next) | |
437 | if (pi->tid == tid) | |
438 | break; | |
439 | } | |
c906108c | 440 | |
c3f6f71d JM |
441 | return pi; |
442 | } | |
c906108c | 443 | |
c3f6f71d JM |
444 | /* |
445 | * Function: find_procinfo_or_die | |
446 | * | |
447 | * Calls find_procinfo, but errors on failure. | |
448 | */ | |
c906108c | 449 | |
c3f6f71d | 450 | static procinfo * |
fba45db2 | 451 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
452 | { |
453 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 454 | |
c3f6f71d | 455 | if (pi == NULL) |
0fda6bd2 JM |
456 | { |
457 | if (tid) | |
458 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
459 | pid, tid); | |
460 | else | |
461 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
462 | } | |
c3f6f71d JM |
463 | return pi; |
464 | } | |
c906108c | 465 | |
4d1bcd09 KB |
466 | /* open_with_retry() is a wrapper for open(). The appropriate |
467 | open() call is attempted; if unsuccessful, it will be retried as | |
468 | many times as needed for the EAGAIN and EINTR conditions. | |
469 | ||
470 | For other conditions, open_with_retry() will retry the open() a | |
471 | limited number of times. In addition, a short sleep is imposed | |
472 | prior to retrying the open(). The reason for this sleep is to give | |
473 | the kernel a chance to catch up and create the file in question in | |
474 | the event that GDB "wins" the race to open a file before the kernel | |
475 | has created it. */ | |
476 | ||
477 | static int | |
478 | open_with_retry (const char *pathname, int flags) | |
479 | { | |
480 | int retries_remaining, status; | |
481 | ||
482 | retries_remaining = 2; | |
483 | ||
484 | while (1) | |
485 | { | |
486 | status = open (pathname, flags); | |
487 | ||
488 | if (status >= 0 || retries_remaining == 0) | |
489 | break; | |
490 | else if (errno != EINTR && errno != EAGAIN) | |
491 | { | |
492 | retries_remaining--; | |
493 | sleep (1); | |
494 | } | |
495 | } | |
496 | ||
497 | return status; | |
498 | } | |
499 | ||
c3f6f71d JM |
500 | /* |
501 | * Function: open_procinfo_files | |
502 | * | |
503 | * Open the file descriptor for the process or LWP. | |
504 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
505 | * the others are opened lazily as needed. | |
506 | * else (if not NEW_PROC_API), there is only one real | |
507 | * file descriptor, but we keep multiple copies of it so that | |
508 | * the code that uses them does not have to be #ifdef'd. | |
509 | * | |
510 | * Return: file descriptor, or zero for failure. | |
511 | */ | |
c906108c | 512 | |
c3f6f71d | 513 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 514 | |
c3f6f71d | 515 | static int |
fba45db2 | 516 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 517 | { |
0fda6bd2 | 518 | #ifdef NEW_PROC_API |
c3f6f71d | 519 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 520 | #endif |
c3f6f71d JM |
521 | int fd; |
522 | ||
523 | /* | |
524 | * This function is getting ALMOST long enough to break up into several. | |
525 | * Here is some rationale: | |
526 | * | |
527 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
528 | * There are several file descriptors that may need to be open | |
529 | * for any given process or LWP. The ones we're intereted in are: | |
530 | * - control (ctl) write-only change the state | |
531 | * - status (status) read-only query the state | |
532 | * - address space (as) read/write access memory | |
533 | * - map (map) read-only virtual addr map | |
534 | * Most of these are opened lazily as they are needed. | |
535 | * The pathnames for the 'files' for an LWP look slightly | |
536 | * different from those of a first-class process: | |
537 | * Pathnames for a process (<proc-id>): | |
538 | * /proc/<proc-id>/ctl | |
539 | * /proc/<proc-id>/status | |
540 | * /proc/<proc-id>/as | |
541 | * /proc/<proc-id>/map | |
542 | * Pathnames for an LWP (lwp-id): | |
543 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
544 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
545 | * An LWP has no map or address space file descriptor, since | |
546 | * the memory map and address space are shared by all LWPs. | |
547 | * | |
548 | * Everyone else (Solaris 2.5, Irix, OSF) | |
549 | * There is only one file descriptor for each process or LWP. | |
550 | * For convenience, we copy the same file descriptor into all | |
551 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
552 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
553 | * doesn't need any #ifdef's. | |
554 | * Pathname for all: | |
555 | * /proc/<proc-id> | |
556 | * | |
557 | * Solaris 2.5 LWP's: | |
558 | * Each LWP has an independent file descriptor, but these | |
559 | * are not obtained via the 'open' system call like the rest: | |
560 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
561 | * to the file descriptor of the parent process. | |
562 | * | |
563 | * OSF threads: | |
564 | * These do not even have their own independent file descriptor. | |
565 | * All operations are carried out on the file descriptor of the | |
566 | * parent process. Therefore we just call open again for each | |
567 | * thread, getting a new handle for the same 'file'. | |
568 | */ | |
569 | ||
570 | #ifdef NEW_PROC_API | |
571 | /* | |
572 | * In this case, there are several different file descriptors that | |
573 | * we might be asked to open. The control file descriptor will be | |
574 | * opened early, but the others will be opened lazily as they are | |
575 | * needed. | |
576 | */ | |
577 | ||
578 | strcpy (tmp, pi->pathname); | |
579 | switch (which) { /* which file descriptor to open? */ | |
580 | case FD_CTL: | |
581 | if (pi->tid) | |
582 | strcat (tmp, "/lwpctl"); | |
583 | else | |
584 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 585 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
586 | if (fd <= 0) |
587 | return 0; /* fail */ | |
588 | pi->ctl_fd = fd; | |
589 | break; | |
590 | case FD_AS: | |
591 | if (pi->tid) | |
592 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
593 | strcat (tmp, "/as"); | |
4d1bcd09 | 594 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
595 | if (fd <= 0) |
596 | return 0; /* fail */ | |
597 | pi->as_fd = fd; | |
598 | break; | |
599 | case FD_STATUS: | |
600 | if (pi->tid) | |
601 | strcat (tmp, "/lwpstatus"); | |
602 | else | |
603 | strcat (tmp, "/status"); | |
4d1bcd09 | 604 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
605 | if (fd <= 0) |
606 | return 0; /* fail */ | |
607 | pi->status_fd = fd; | |
608 | break; | |
609 | default: | |
610 | return 0; /* unknown file descriptor */ | |
611 | } | |
612 | #else /* not NEW_PROC_API */ | |
613 | /* | |
614 | * In this case, there is only one file descriptor for each procinfo | |
615 | * (ie. each process or LWP). In fact, only the file descriptor for | |
616 | * the process can actually be opened by an 'open' system call. | |
617 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
618 | * on the process's file descriptor. | |
619 | * | |
620 | * For convenience, we copy each procinfo's single file descriptor | |
621 | * into all of the fields occupied by the several file descriptors | |
622 | * of the NEW_PROC_API implementation. That way, the code that uses | |
623 | * them can be written without ifdefs. | |
624 | */ | |
625 | ||
626 | ||
627 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
628 | /* Only one FD; just open it. */ |
629 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
630 | return 0; |
631 | #else /* Sol 2.5, Irix, other? */ | |
632 | if (pi->tid == 0) /* Master procinfo for the process */ | |
633 | { | |
4d1bcd09 | 634 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
635 | if (fd <= 0) |
636 | return 0; /* fail */ | |
637 | } | |
638 | else /* LWP thread procinfo */ | |
639 | { | |
640 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
641 | procinfo *process; | |
642 | int lwpid = pi->tid; | |
643 | ||
644 | /* Find the procinfo for the entire process. */ | |
645 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
646 | return 0; /* fail */ | |
647 | ||
648 | /* Now obtain the file descriptor for the LWP. */ | |
649 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
650 | return 0; /* fail */ | |
651 | #else /* Irix, other? */ | |
652 | return 0; /* Don't know how to open threads */ | |
653 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
654 | } | |
655 | #endif /* OSF PIOCTSTATUS */ | |
656 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
657 | #endif /* NEW_PROC_API */ | |
c906108c | 658 | |
c3f6f71d JM |
659 | return 1; /* success */ |
660 | } | |
c906108c | 661 | |
c3f6f71d JM |
662 | /* |
663 | * Function: create_procinfo | |
664 | * | |
665 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 666 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
667 | * |
668 | * Return: pointer to new procinfo struct. | |
669 | */ | |
c906108c | 670 | |
c3f6f71d | 671 | static procinfo * |
fba45db2 | 672 | create_procinfo (int pid, int tid) |
c3f6f71d JM |
673 | { |
674 | procinfo *pi, *parent; | |
c906108c | 675 | |
0d06e24b | 676 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 677 | return pi; /* Already exists, nothing to do. */ |
c906108c | 678 | |
c3f6f71d JM |
679 | /* find parent before doing malloc, to save having to cleanup */ |
680 | if (tid != 0) | |
681 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
682 | create it if it | |
683 | doesn't exist yet? */ | |
c906108c | 684 | |
c3f6f71d JM |
685 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
686 | memset (pi, 0, sizeof (procinfo)); | |
687 | pi->pid = pid; | |
688 | pi->tid = tid; | |
c906108c | 689 | |
37de36c6 KB |
690 | #ifdef DYNAMIC_SYSCALLS |
691 | load_syscalls (pi); | |
692 | #endif | |
693 | ||
1d5e0602 KB |
694 | pi->saved_entryset = sysset_t_alloc (pi); |
695 | pi->saved_exitset = sysset_t_alloc (pi); | |
696 | ||
c3f6f71d JM |
697 | /* Chain into list. */ |
698 | if (tid == 0) | |
699 | { | |
700 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
701 | pi->next = procinfo_list; | |
702 | procinfo_list = pi; | |
703 | } | |
704 | else | |
705 | { | |
706 | #ifdef NEW_PROC_API | |
707 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
708 | #else | |
709 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
710 | #endif | |
711 | pi->next = parent->thread_list; | |
712 | parent->thread_list = pi; | |
713 | } | |
714 | return pi; | |
715 | } | |
c906108c | 716 | |
c3f6f71d JM |
717 | /* |
718 | * Function: close_procinfo_files | |
719 | * | |
720 | * Close all file descriptors associated with the procinfo | |
721 | */ | |
c906108c | 722 | |
c3f6f71d | 723 | static void |
fba45db2 | 724 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
725 | { |
726 | if (pi->ctl_fd > 0) | |
727 | close (pi->ctl_fd); | |
728 | #ifdef NEW_PROC_API | |
729 | if (pi->as_fd > 0) | |
730 | close (pi->as_fd); | |
731 | if (pi->status_fd > 0) | |
732 | close (pi->status_fd); | |
733 | #endif | |
734 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
735 | } | |
c906108c | 736 | |
c3f6f71d JM |
737 | /* |
738 | * Function: destroy_procinfo | |
739 | * | |
740 | * Destructor function. Close, unlink and deallocate the object. | |
741 | */ | |
c906108c | 742 | |
c3f6f71d | 743 | static void |
fba45db2 | 744 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
745 | { |
746 | procinfo *ptr; | |
747 | ||
748 | /* Step one: unlink the procinfo from its list */ | |
749 | if (pi == *list) | |
750 | *list = pi->next; | |
751 | else | |
752 | for (ptr = *list; ptr; ptr = ptr->next) | |
753 | if (ptr->next == pi) | |
754 | { | |
755 | ptr->next = pi->next; | |
756 | break; | |
757 | } | |
7a292a7a | 758 | |
c3f6f71d JM |
759 | /* Step two: close any open file descriptors */ |
760 | close_procinfo_files (pi); | |
7a292a7a | 761 | |
c3f6f71d | 762 | /* Step three: free the memory. */ |
37de36c6 KB |
763 | #ifdef DYNAMIC_SYSCALLS |
764 | free_syscalls (pi); | |
765 | #endif | |
1d5e0602 KB |
766 | xfree (pi->saved_entryset); |
767 | xfree (pi->saved_exitset); | |
b8c9b27d | 768 | xfree (pi); |
c3f6f71d | 769 | } |
c906108c | 770 | |
c3f6f71d | 771 | static void |
fba45db2 | 772 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
773 | { |
774 | procinfo *tmp; | |
c906108c | 775 | |
c3f6f71d JM |
776 | if (pi->tid != 0) /* destroy a thread procinfo */ |
777 | { | |
778 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
779 | destroy_one_procinfo (&tmp->thread_list, pi); | |
780 | } | |
781 | else /* destroy a process procinfo and all its threads */ | |
782 | { | |
783 | /* First destroy the children, if any; */ | |
784 | while (pi->thread_list != NULL) | |
785 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
786 | /* Then destroy the parent. Genocide!!! */ | |
787 | destroy_one_procinfo (&procinfo_list, pi); | |
788 | } | |
789 | } | |
c906108c | 790 | |
004527cb AC |
791 | static void |
792 | do_destroy_procinfo_cleanup (void *pi) | |
793 | { | |
794 | destroy_procinfo (pi); | |
795 | } | |
796 | ||
c3f6f71d | 797 | enum { NOKILL, KILL }; |
c906108c | 798 | |
c3f6f71d JM |
799 | /* |
800 | * Function: dead_procinfo | |
801 | * | |
802 | * To be called on a non_recoverable error for a procinfo. | |
803 | * Prints error messages, optionally sends a SIGKILL to the process, | |
804 | * then destroys the data structure. | |
805 | */ | |
c906108c | 806 | |
c3f6f71d | 807 | static void |
fba45db2 | 808 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
809 | { |
810 | char procfile[80]; | |
c906108c | 811 | |
c3f6f71d JM |
812 | if (pi->pathname) |
813 | { | |
814 | print_sys_errmsg (pi->pathname, errno); | |
815 | } | |
816 | else | |
817 | { | |
818 | sprintf (procfile, "process %d", pi->pid); | |
819 | print_sys_errmsg (procfile, errno); | |
820 | } | |
821 | if (kill_p == KILL) | |
822 | kill (pi->pid, SIGKILL); | |
c906108c | 823 | |
c3f6f71d JM |
824 | destroy_procinfo (pi); |
825 | error (msg); | |
826 | } | |
c906108c | 827 | |
37de36c6 KB |
828 | /* |
829 | * Function: sysset_t_size | |
830 | * | |
831 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
832 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
833 | * size of sysset_t isn't known until runtime. | |
834 | */ | |
835 | ||
836 | static int | |
837 | sysset_t_size (procinfo * pi) | |
838 | { | |
839 | #ifndef DYNAMIC_SYSCALLS | |
840 | return sizeof (sysset_t); | |
841 | #else | |
842 | return sizeof (sysset_t) - sizeof (uint64_t) | |
843 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
844 | / (8 * sizeof (uint64_t))); | |
845 | #endif | |
846 | } | |
847 | ||
848 | /* Function: sysset_t_alloc | |
849 | ||
850 | Allocate and (partially) initialize a sysset_t struct. */ | |
851 | ||
852 | static sysset_t * | |
853 | sysset_t_alloc (procinfo * pi) | |
854 | { | |
855 | sysset_t *ret; | |
856 | int size = sysset_t_size (pi); | |
857 | ret = xmalloc (size); | |
858 | #ifdef DYNAMIC_SYSCALLS | |
859 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
860 | / (8 * sizeof (uint64_t)); | |
861 | #endif | |
862 | return ret; | |
863 | } | |
864 | ||
865 | #ifdef DYNAMIC_SYSCALLS | |
866 | ||
867 | /* Function: load_syscalls | |
868 | ||
869 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize | |
870 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
871 | with the names. (Certain numbers may be skipped in which case the | |
872 | names for these numbers will be left as NULL.) */ | |
873 | ||
874 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
875 | #define MAX_SYSCALLS 65536 | |
876 | ||
877 | static void | |
878 | load_syscalls (procinfo *pi) | |
879 | { | |
880 | char pathname[MAX_PROC_NAME_SIZE]; | |
881 | int sysent_fd; | |
882 | prsysent_t header; | |
883 | prsyscall_t *syscalls; | |
884 | int i, size, maxcall; | |
885 | ||
886 | pi->num_syscalls = 0; | |
887 | pi->syscall_names = 0; | |
888 | ||
889 | /* Open the file descriptor for the sysent file */ | |
890 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 891 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
892 | if (sysent_fd < 0) |
893 | { | |
894 | error ("load_syscalls: Can't open /proc/%d/sysent", pi->pid); | |
895 | } | |
896 | ||
897 | size = sizeof header - sizeof (prsyscall_t); | |
898 | if (read (sysent_fd, &header, size) != size) | |
899 | { | |
900 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
901 | } | |
902 | ||
903 | if (header.pr_nsyscalls == 0) | |
904 | { | |
905 | error ("load_syscalls: /proc/%d/sysent contains no syscalls!", pi->pid); | |
906 | } | |
907 | ||
908 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
909 | syscalls = xmalloc (size); | |
910 | ||
911 | if (read (sysent_fd, syscalls, size) != size) | |
912 | { | |
913 | xfree (syscalls); | |
914 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
915 | } | |
916 | ||
917 | /* Find maximum syscall number. This may not be the same as | |
918 | pr_nsyscalls since that value refers to the number of entries | |
919 | in the table. (Also, the docs indicate that some system | |
920 | call numbers may be skipped.) */ | |
921 | ||
922 | maxcall = syscalls[0].pr_number; | |
923 | ||
924 | for (i = 1; i < header.pr_nsyscalls; i++) | |
925 | if (syscalls[i].pr_number > maxcall | |
926 | && syscalls[i].pr_nameoff > 0 | |
927 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
928 | maxcall = syscalls[i].pr_number; | |
929 | ||
930 | pi->num_syscalls = maxcall+1; | |
931 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
932 | ||
933 | for (i = 0; i < pi->num_syscalls; i++) | |
934 | pi->syscall_names[i] = NULL; | |
935 | ||
936 | /* Read the syscall names in */ | |
937 | for (i = 0; i < header.pr_nsyscalls; i++) | |
938 | { | |
939 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
940 | int nread; | |
941 | int callnum; | |
942 | ||
943 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
944 | || syscalls[i].pr_number < 0 | |
945 | || syscalls[i].pr_nameoff <= 0 | |
946 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
947 | != (off_t) syscalls[i].pr_nameoff)) | |
948 | continue; | |
949 | ||
950 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
951 | if (nread <= 0) | |
952 | continue; | |
953 | ||
954 | callnum = syscalls[i].pr_number; | |
955 | ||
956 | if (pi->syscall_names[callnum] != NULL) | |
957 | { | |
958 | /* FIXME: Generate warning */ | |
959 | continue; | |
960 | } | |
961 | ||
962 | namebuf[nread-1] = '\0'; | |
963 | size = strlen (namebuf) + 1; | |
964 | pi->syscall_names[callnum] = xmalloc (size); | |
965 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
966 | pi->syscall_names[callnum][size-1] = '\0'; | |
967 | } | |
968 | ||
969 | close (sysent_fd); | |
970 | xfree (syscalls); | |
971 | } | |
972 | ||
973 | /* Function: free_syscalls | |
974 | ||
975 | Free the space allocated for the syscall names from the procinfo | |
976 | structure. */ | |
977 | ||
978 | static void | |
979 | free_syscalls (procinfo *pi) | |
980 | { | |
981 | if (pi->syscall_names) | |
982 | { | |
983 | int i; | |
984 | ||
985 | for (i = 0; i < pi->num_syscalls; i++) | |
986 | if (pi->syscall_names[i] != NULL) | |
987 | xfree (pi->syscall_names[i]); | |
988 | ||
989 | xfree (pi->syscall_names); | |
990 | pi->syscall_names = 0; | |
991 | } | |
992 | } | |
993 | ||
994 | /* Function: find_syscall | |
995 | ||
996 | Given a name, look up (and return) the corresponding syscall number. | |
997 | If no match is found, return -1. */ | |
998 | ||
999 | static int | |
1000 | find_syscall (procinfo *pi, char *name) | |
1001 | { | |
1002 | int i; | |
1003 | for (i = 0; i < pi->num_syscalls; i++) | |
1004 | { | |
1005 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1006 | return i; | |
1007 | } | |
1008 | return -1; | |
1009 | } | |
1010 | #endif | |
1011 | ||
c3f6f71d | 1012 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1013 | |
c3f6f71d | 1014 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1015 | |
c3f6f71d JM |
1016 | /* |
1017 | * This "module" is the interface layer between the /proc system API | |
1018 | * and the gdb target vector functions. This layer consists of | |
1019 | * access functions that encapsulate each of the basic operations | |
1020 | * that we need to use from the /proc API. | |
1021 | * | |
1022 | * The main motivation for this layer is to hide the fact that | |
1023 | * there are two very different implementations of the /proc API. | |
1024 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1025 | * functions, we do our best to hide them all in here. | |
1026 | */ | |
c906108c | 1027 | |
a14ed312 KB |
1028 | int proc_get_status (procinfo * pi); |
1029 | long proc_flags (procinfo * pi); | |
1030 | int proc_why (procinfo * pi); | |
1031 | int proc_what (procinfo * pi); | |
1032 | int proc_set_run_on_last_close (procinfo * pi); | |
1033 | int proc_unset_run_on_last_close (procinfo * pi); | |
1034 | int proc_set_inherit_on_fork (procinfo * pi); | |
1035 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1036 | int proc_set_async (procinfo * pi); | |
1037 | int proc_unset_async (procinfo * pi); | |
1038 | int proc_stop_process (procinfo * pi); | |
1039 | int proc_trace_signal (procinfo * pi, int signo); | |
1040 | int proc_ignore_signal (procinfo * pi, int signo); | |
1041 | int proc_clear_current_fault (procinfo * pi); | |
1042 | int proc_set_current_signal (procinfo * pi, int signo); | |
1043 | int proc_clear_current_signal (procinfo * pi); | |
1044 | int proc_set_gregs (procinfo * pi); | |
1045 | int proc_set_fpregs (procinfo * pi); | |
1046 | int proc_wait_for_stop (procinfo * pi); | |
1047 | int proc_run_process (procinfo * pi, int step, int signo); | |
1048 | int proc_kill (procinfo * pi, int signo); | |
1049 | int proc_parent_pid (procinfo * pi); | |
1050 | int proc_get_nthreads (procinfo * pi); | |
1051 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1052 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1053 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1054 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1055 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1056 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1057 | |
1058 | int proc_update_threads (procinfo * pi); | |
1059 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1060 | int (*func) (procinfo *, procinfo *, void *), |
1061 | void *ptr); | |
a14ed312 KB |
1062 | |
1063 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1064 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1065 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1066 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1067 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1068 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1069 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1070 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1071 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1072 | |
1073 | void proc_warn (procinfo * pi, char *func, int line); | |
1074 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1075 | |
c3f6f71d | 1076 | void |
fba45db2 | 1077 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1078 | { |
1079 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1080 | print_sys_errmsg (errmsg, errno); | |
1081 | } | |
c906108c | 1082 | |
c3f6f71d | 1083 | void |
fba45db2 | 1084 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1085 | { |
1086 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1087 | perror_with_name (errmsg); | |
1088 | } | |
c906108c | 1089 | |
c3f6f71d JM |
1090 | /* |
1091 | * Function: proc_get_status | |
1092 | * | |
1093 | * Updates the status struct in the procinfo. | |
1094 | * There is a 'valid' flag, to let other functions know when | |
1095 | * this function needs to be called (so the status is only | |
1096 | * read when it is needed). The status file descriptor is | |
1097 | * also only opened when it is needed. | |
1098 | * | |
1099 | * Return: non-zero for success, zero for failure. | |
1100 | */ | |
c906108c | 1101 | |
c3f6f71d | 1102 | int |
fba45db2 | 1103 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1104 | { |
1105 | /* Status file descriptor is opened "lazily" */ | |
1106 | if (pi->status_fd == 0 && | |
1107 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1108 | { | |
1109 | pi->status_valid = 0; | |
1110 | return 0; | |
1111 | } | |
c906108c | 1112 | |
c3f6f71d JM |
1113 | #ifdef NEW_PROC_API |
1114 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1115 | pi->status_valid = 0; /* fail */ | |
1116 | else | |
1117 | { | |
1118 | /* Sigh... I have to read a different data structure, | |
1119 | depending on whether this is a main process or an LWP. */ | |
1120 | if (pi->tid) | |
1121 | pi->status_valid = (read (pi->status_fd, | |
1122 | (char *) &pi->prstatus.pr_lwp, | |
1123 | sizeof (lwpstatus_t)) | |
1124 | == sizeof (lwpstatus_t)); | |
1125 | else | |
1126 | { | |
1127 | pi->status_valid = (read (pi->status_fd, | |
1128 | (char *) &pi->prstatus, | |
1129 | sizeof (gdb_prstatus_t)) | |
1130 | == sizeof (gdb_prstatus_t)); | |
1131 | #if 0 /*def UNIXWARE*/ | |
1132 | if (pi->status_valid && | |
1133 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1134 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1135 | /* Unixware peculiarity -- read the damn thing again! */ | |
1136 | pi->status_valid = (read (pi->status_fd, | |
1137 | (char *) &pi->prstatus, | |
1138 | sizeof (gdb_prstatus_t)) | |
1139 | == sizeof (gdb_prstatus_t)); | |
1140 | #endif /* UNIXWARE */ | |
1141 | } | |
1142 | } | |
1143 | #else /* ioctl method */ | |
1144 | #ifdef PIOCTSTATUS /* osf */ | |
1145 | if (pi->tid == 0) /* main process */ | |
1146 | { | |
1147 | /* Just read the danged status. Now isn't that simple? */ | |
1148 | pi->status_valid = | |
1149 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1150 | } | |
1151 | else | |
1152 | { | |
1153 | int win; | |
1154 | struct { | |
1155 | long pr_count; | |
1156 | tid_t pr_error_thread; | |
1157 | struct prstatus status; | |
1158 | } thread_status; | |
1159 | ||
1160 | thread_status.pr_count = 1; | |
1161 | thread_status.status.pr_tid = pi->tid; | |
1162 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1163 | if (win) | |
1164 | { | |
1165 | memcpy (&pi->prstatus, &thread_status.status, | |
1166 | sizeof (pi->prstatus)); | |
1167 | pi->status_valid = 1; | |
1168 | } | |
1169 | } | |
1170 | #else | |
1171 | /* Just read the danged status. Now isn't that simple? */ | |
1172 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1173 | #endif | |
1174 | #endif | |
c906108c | 1175 | |
c3f6f71d JM |
1176 | if (pi->status_valid) |
1177 | { | |
1178 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1179 | proc_why (pi), | |
1180 | proc_what (pi), | |
1181 | proc_get_current_thread (pi)); | |
1182 | } | |
c906108c | 1183 | |
c3f6f71d JM |
1184 | /* The status struct includes general regs, so mark them valid too */ |
1185 | pi->gregs_valid = pi->status_valid; | |
1186 | #ifdef NEW_PROC_API | |
1187 | /* In the read/write multiple-fd model, | |
1188 | the status struct includes the fp regs too, so mark them valid too */ | |
1189 | pi->fpregs_valid = pi->status_valid; | |
1190 | #endif | |
1191 | return pi->status_valid; /* True if success, false if failure. */ | |
1192 | } | |
c906108c | 1193 | |
c3f6f71d JM |
1194 | /* |
1195 | * Function: proc_flags | |
1196 | * | |
1197 | * returns the process flags (pr_flags field). | |
1198 | */ | |
1199 | ||
1200 | long | |
fba45db2 | 1201 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1202 | { |
1203 | if (!pi->status_valid) | |
1204 | if (!proc_get_status (pi)) | |
1205 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1206 | |
c3f6f71d | 1207 | #ifdef NEW_PROC_API |
0d06e24b JM |
1208 | # ifdef UNIXWARE |
1209 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1210 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1211 | The two sets of flags don't overlap. */ | |
1212 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1213 | # else | |
c3f6f71d | 1214 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1215 | # endif |
c3f6f71d JM |
1216 | #else |
1217 | return pi->prstatus.pr_flags; | |
1218 | #endif | |
1219 | } | |
c906108c | 1220 | |
c3f6f71d JM |
1221 | /* |
1222 | * Function: proc_why | |
1223 | * | |
1224 | * returns the pr_why field (why the process stopped). | |
1225 | */ | |
c906108c | 1226 | |
c3f6f71d | 1227 | int |
fba45db2 | 1228 | proc_why (procinfo *pi) |
c3f6f71d JM |
1229 | { |
1230 | if (!pi->status_valid) | |
1231 | if (!proc_get_status (pi)) | |
1232 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1233 | |
c3f6f71d JM |
1234 | #ifdef NEW_PROC_API |
1235 | return pi->prstatus.pr_lwp.pr_why; | |
1236 | #else | |
1237 | return pi->prstatus.pr_why; | |
1238 | #endif | |
1239 | } | |
c906108c | 1240 | |
c3f6f71d JM |
1241 | /* |
1242 | * Function: proc_what | |
1243 | * | |
1244 | * returns the pr_what field (details of why the process stopped). | |
1245 | */ | |
c906108c | 1246 | |
c3f6f71d | 1247 | int |
fba45db2 | 1248 | proc_what (procinfo *pi) |
c3f6f71d JM |
1249 | { |
1250 | if (!pi->status_valid) | |
1251 | if (!proc_get_status (pi)) | |
1252 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1253 | |
c3f6f71d JM |
1254 | #ifdef NEW_PROC_API |
1255 | return pi->prstatus.pr_lwp.pr_what; | |
1256 | #else | |
1257 | return pi->prstatus.pr_what; | |
c906108c | 1258 | #endif |
c3f6f71d | 1259 | } |
c906108c | 1260 | |
c3f6f71d JM |
1261 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1262 | /* | |
1263 | * Function: proc_nsysarg | |
1264 | * | |
1265 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1266 | */ | |
1267 | ||
1268 | int | |
fba45db2 | 1269 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1270 | { |
1271 | if (!pi->status_valid) | |
1272 | if (!proc_get_status (pi)) | |
1273 | return 0; | |
1274 | ||
1275 | #ifdef NEW_PROC_API | |
1276 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1277 | #else | |
1278 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1279 | #endif |
c3f6f71d | 1280 | } |
c906108c | 1281 | |
c3f6f71d JM |
1282 | /* |
1283 | * Function: proc_sysargs | |
1284 | * | |
1285 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1286 | */ | |
c906108c | 1287 | |
c3f6f71d | 1288 | long * |
fba45db2 | 1289 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1290 | { |
1291 | if (!pi->status_valid) | |
1292 | if (!proc_get_status (pi)) | |
1293 | return NULL; | |
1294 | ||
1295 | #ifdef NEW_PROC_API | |
1296 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1297 | #else | |
1298 | return (long *) &pi->prstatus.pr_sysarg; | |
1299 | #endif | |
1300 | } | |
c906108c | 1301 | |
c3f6f71d JM |
1302 | /* |
1303 | * Function: proc_syscall | |
1304 | * | |
1305 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1306 | */ | |
c906108c | 1307 | |
c3f6f71d | 1308 | int |
fba45db2 | 1309 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1310 | { |
1311 | if (!pi->status_valid) | |
1312 | if (!proc_get_status (pi)) | |
1313 | return 0; | |
1314 | ||
1315 | #ifdef NEW_PROC_API | |
1316 | return pi->prstatus.pr_lwp.pr_syscall; | |
1317 | #else | |
1318 | return pi->prstatus.pr_syscall; | |
1319 | #endif | |
1320 | } | |
1321 | #endif /* PIOCSSPCACT */ | |
c906108c | 1322 | |
c3f6f71d JM |
1323 | /* |
1324 | * Function: proc_cursig: | |
1325 | * | |
1326 | * returns the pr_cursig field (current signal). | |
1327 | */ | |
c906108c | 1328 | |
c3f6f71d JM |
1329 | long |
1330 | proc_cursig (struct procinfo *pi) | |
1331 | { | |
1332 | if (!pi->status_valid) | |
1333 | if (!proc_get_status (pi)) | |
1334 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1335 | |
c3f6f71d JM |
1336 | #ifdef NEW_PROC_API |
1337 | return pi->prstatus.pr_lwp.pr_cursig; | |
1338 | #else | |
1339 | return pi->prstatus.pr_cursig; | |
1340 | #endif | |
1341 | } | |
c906108c | 1342 | |
c3f6f71d | 1343 | /* |
0d06e24b | 1344 | * Function: proc_modify_flag |
c3f6f71d JM |
1345 | * |
1346 | * === I appologize for the messiness of this function. | |
1347 | * === This is an area where the different versions of | |
1348 | * === /proc are more inconsistent than usual. MVS | |
1349 | * | |
1350 | * Set or reset any of the following process flags: | |
1351 | * PR_FORK -- forked child will inherit trace flags | |
1352 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1353 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1354 | * PR_ASYNC -- LWP's get to run/stop independently. |
1355 | * | |
1356 | * There are three methods for doing this function: | |
1357 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1358 | * [Sol6, Sol7, UW] | |
1359 | * 2) Middle: PIOCSET/PIOCRESET | |
1360 | * [Irix, Sol5] | |
1361 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1362 | * [OSF, Sol5] | |
1363 | * | |
1364 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1365 | * Note: OSF does not define PR_KLC. |
1366 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1367 | * |
1368 | * Arguments: | |
1369 | * pi -- the procinfo | |
1370 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1371 | * mode -- 1 for set, 0 for reset. | |
1372 | * | |
1373 | * Returns non-zero for success, zero for failure. | |
1374 | */ | |
c906108c | 1375 | |
c3f6f71d | 1376 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1377 | |
c3f6f71d | 1378 | static int |
fba45db2 | 1379 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1380 | { |
1381 | long win = 0; /* default to fail */ | |
1382 | ||
1383 | /* | |
1384 | * These operations affect the process as a whole, and applying | |
1385 | * them to an individual LWP has the same meaning as applying them | |
1386 | * to the main process. Therefore, if we're ever called with a | |
1387 | * pointer to an LWP's procinfo, let's substitute the process's | |
1388 | * procinfo and avoid opening the LWP's file descriptor | |
1389 | * unnecessarily. | |
1390 | */ | |
1391 | ||
1392 | if (pi->pid != 0) | |
1393 | pi = find_procinfo_or_die (pi->pid, 0); | |
1394 | ||
1395 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1396 | /* First normalize the PCUNSET/PCRESET command opcode | |
1397 | (which for no obvious reason has a different definition | |
1398 | from one operating system to the next...) */ | |
1399 | #ifdef PCUNSET | |
1400 | #define GDBRESET PCUNSET | |
37de36c6 | 1401 | #else |
c3f6f71d JM |
1402 | #ifdef PCRESET |
1403 | #define GDBRESET PCRESET | |
37de36c6 | 1404 | #endif |
c906108c | 1405 | #endif |
c3f6f71d | 1406 | { |
37de36c6 | 1407 | procfs_ctl_t arg[2]; |
c906108c | 1408 | |
c3f6f71d JM |
1409 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1410 | arg[0] = PCSET; | |
1411 | else /* Reset the flag */ | |
1412 | arg[0] = GDBRESET; | |
c5aa993b | 1413 | |
c3f6f71d JM |
1414 | arg[1] = flag; |
1415 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1416 | } | |
1417 | #else | |
1418 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1419 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1420 | { | |
1421 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1422 | } | |
1423 | else /* Reset the flag */ | |
1424 | { | |
1425 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1426 | } | |
c906108c | 1427 | |
c3f6f71d JM |
1428 | #else |
1429 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1430 | switch (flag) { | |
1431 | case PR_RLC: | |
1432 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1433 | { | |
1434 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1435 | } | |
1436 | else /* Clear run-on-last-close */ | |
1437 | { | |
1438 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1439 | } | |
1440 | break; | |
1441 | case PR_FORK: | |
1442 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1443 | { | |
1444 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1445 | } | |
1446 | else /* Clear inherit-on-fork */ | |
1447 | { | |
1448 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1449 | } | |
1450 | break; | |
1451 | default: | |
1452 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1453 | break; | |
1454 | } | |
1455 | #endif | |
1456 | #endif | |
1457 | #endif | |
1458 | #undef GDBRESET | |
1459 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1460 | pi->status_valid = 0; | |
c906108c | 1461 | |
c3f6f71d JM |
1462 | if (!win) |
1463 | warning ("procfs: modify_flag failed to turn %s %s", | |
1464 | flag == PR_FORK ? "PR_FORK" : | |
1465 | flag == PR_RLC ? "PR_RLC" : | |
1466 | #ifdef PR_ASYNC | |
1467 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1468 | #endif |
1469 | #ifdef PR_KLC | |
1470 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1471 | #endif |
1472 | "<unknown flag>", | |
1473 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1474 | |
c3f6f71d JM |
1475 | return win; |
1476 | } | |
c906108c | 1477 | |
c3f6f71d JM |
1478 | /* |
1479 | * Function: proc_set_run_on_last_close | |
1480 | * | |
1481 | * Set the run_on_last_close flag. | |
1482 | * Process with all threads will become runnable | |
1483 | * when debugger closes all /proc fds. | |
1484 | * | |
1485 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1486 | */ |
1487 | ||
c3f6f71d | 1488 | int |
fba45db2 | 1489 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1490 | { |
c3f6f71d JM |
1491 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1492 | } | |
c906108c | 1493 | |
c3f6f71d JM |
1494 | /* |
1495 | * Function: proc_unset_run_on_last_close | |
1496 | * | |
1497 | * Reset the run_on_last_close flag. | |
1498 | * Process will NOT become runnable | |
1499 | * when debugger closes its file handles. | |
1500 | * | |
1501 | * Returns non-zero for success, zero for failure. | |
1502 | */ | |
c906108c | 1503 | |
c3f6f71d | 1504 | int |
fba45db2 | 1505 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1506 | { |
1507 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1508 | } |
1509 | ||
0d06e24b JM |
1510 | #ifdef PR_KLC |
1511 | /* | |
1512 | * Function: proc_set_kill_on_last_close | |
1513 | * | |
1514 | * Set the kill_on_last_close flag. | |
1515 | * Process with all threads will be killed when debugger | |
1516 | * closes all /proc fds (or debugger exits or dies). | |
1517 | * | |
1518 | * Returns non-zero for success, zero for failure. | |
1519 | */ | |
1520 | ||
1521 | int | |
fba45db2 | 1522 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1523 | { |
1524 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | * Function: proc_unset_kill_on_last_close | |
1529 | * | |
1530 | * Reset the kill_on_last_close flag. | |
1531 | * Process will NOT be killed when debugger | |
1532 | * closes its file handles (or exits or dies). | |
1533 | * | |
1534 | * Returns non-zero for success, zero for failure. | |
1535 | */ | |
1536 | ||
1537 | int | |
fba45db2 | 1538 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1539 | { |
1540 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1541 | } | |
1542 | #endif /* PR_KLC */ | |
1543 | ||
c906108c | 1544 | /* |
c3f6f71d JM |
1545 | * Function: proc_set_inherit_on_fork |
1546 | * | |
1547 | * Set inherit_on_fork flag. | |
1548 | * If the process forks a child while we are registered for events | |
1549 | * in the parent, then we will also recieve events from the child. | |
1550 | * | |
1551 | * Returns non-zero for success, zero for failure. | |
1552 | */ | |
c906108c | 1553 | |
c3f6f71d | 1554 | int |
fba45db2 | 1555 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1556 | { |
1557 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1558 | } | |
c5aa993b | 1559 | |
c3f6f71d JM |
1560 | /* |
1561 | * Function: proc_unset_inherit_on_fork | |
1562 | * | |
1563 | * Reset inherit_on_fork flag. | |
1564 | * If the process forks a child while we are registered for events | |
1565 | * in the parent, then we will NOT recieve events from the child. | |
1566 | * | |
1567 | * Returns non-zero for success, zero for failure. | |
1568 | */ | |
c906108c | 1569 | |
c3f6f71d | 1570 | int |
fba45db2 | 1571 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1572 | { |
1573 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1574 | } | |
c906108c | 1575 | |
c3f6f71d JM |
1576 | #ifdef PR_ASYNC |
1577 | /* | |
1578 | * Function: proc_set_async | |
1579 | * | |
1580 | * Set PR_ASYNC flag. | |
1581 | * If one LWP stops because of a debug event (signal etc.), | |
1582 | * the remaining LWPs will continue to run. | |
1583 | * | |
1584 | * Returns non-zero for success, zero for failure. | |
1585 | */ | |
c906108c | 1586 | |
c3f6f71d | 1587 | int |
fba45db2 | 1588 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1589 | { |
1590 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1591 | } | |
c906108c | 1592 | |
c3f6f71d JM |
1593 | /* |
1594 | * Function: proc_unset_async | |
1595 | * | |
1596 | * Reset PR_ASYNC flag. | |
1597 | * If one LWP stops because of a debug event (signal etc.), | |
1598 | * then all other LWPs will stop as well. | |
1599 | * | |
1600 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1601 | */ |
1602 | ||
c3f6f71d | 1603 | int |
fba45db2 | 1604 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1605 | { |
1606 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1607 | } | |
1608 | #endif /* PR_ASYNC */ | |
c906108c SS |
1609 | |
1610 | /* | |
c3f6f71d JM |
1611 | * Function: proc_stop_process |
1612 | * | |
1613 | * Request the process/LWP to stop. Does not wait. | |
1614 | * Returns non-zero for success, zero for failure. | |
1615 | */ | |
c906108c | 1616 | |
c3f6f71d | 1617 | int |
fba45db2 | 1618 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1619 | { |
1620 | int win; | |
c906108c | 1621 | |
c3f6f71d JM |
1622 | /* |
1623 | * We might conceivably apply this operation to an LWP, and | |
1624 | * the LWP's ctl file descriptor might not be open. | |
1625 | */ | |
c906108c | 1626 | |
c3f6f71d JM |
1627 | if (pi->ctl_fd == 0 && |
1628 | open_procinfo_files (pi, FD_CTL) == 0) | |
1629 | return 0; | |
1630 | else | |
1631 | { | |
1632 | #ifdef NEW_PROC_API | |
37de36c6 | 1633 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1634 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1635 | #else /* ioctl method */ | |
1636 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1637 | /* Note: the call also reads the prstatus. */ | |
1638 | if (win) | |
1639 | { | |
1640 | pi->status_valid = 1; | |
1641 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1642 | proc_why (pi), | |
1643 | proc_what (pi), | |
1644 | proc_get_current_thread (pi)); | |
1645 | } | |
1646 | #endif | |
1647 | } | |
c906108c | 1648 | |
c3f6f71d JM |
1649 | return win; |
1650 | } | |
c5aa993b | 1651 | |
c3f6f71d JM |
1652 | /* |
1653 | * Function: proc_wait_for_stop | |
1654 | * | |
1655 | * Wait for the process or LWP to stop (block until it does). | |
1656 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1657 | */ |
1658 | ||
c3f6f71d | 1659 | int |
fba45db2 | 1660 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1661 | { |
c3f6f71d JM |
1662 | int win; |
1663 | ||
1664 | /* | |
1665 | * We should never have to apply this operation to any procinfo | |
1666 | * except the one for the main process. If that ever changes | |
1667 | * for any reason, then take out the following clause and | |
1668 | * replace it with one that makes sure the ctl_fd is open. | |
1669 | */ | |
1670 | ||
1671 | if (pi->tid != 0) | |
1672 | pi = find_procinfo_or_die (pi->pid, 0); | |
1673 | ||
1674 | #ifdef NEW_PROC_API | |
1675 | { | |
37de36c6 | 1676 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1677 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1678 | /* We been runnin' and we stopped -- need to update status. */ | |
1679 | pi->status_valid = 0; | |
1680 | } | |
1681 | #else /* ioctl method */ | |
1682 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1683 | /* Above call also refreshes the prstatus. */ | |
1684 | if (win) | |
1685 | { | |
1686 | pi->status_valid = 1; | |
1687 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1688 | proc_why (pi), | |
1689 | proc_what (pi), | |
1690 | proc_get_current_thread (pi)); | |
1691 | } | |
c906108c SS |
1692 | #endif |
1693 | ||
c3f6f71d | 1694 | return win; |
c906108c SS |
1695 | } |
1696 | ||
1697 | /* | |
c3f6f71d JM |
1698 | * Function: proc_run_process |
1699 | * | |
1700 | * Make the process or LWP runnable. | |
1701 | * Options (not all are implemented): | |
1702 | * - single-step | |
1703 | * - clear current fault | |
1704 | * - clear current signal | |
1705 | * - abort the current system call | |
1706 | * - stop as soon as finished with system call | |
1707 | * - (ioctl): set traced signal set | |
1708 | * - (ioctl): set held signal set | |
1709 | * - (ioctl): set traced fault set | |
1710 | * - (ioctl): set start pc (vaddr) | |
1711 | * Always clear the current fault. | |
1712 | * Clear the current signal if 'signo' is zero. | |
1713 | * | |
1714 | * Arguments: | |
1715 | * pi the process or LWP to operate on. | |
1716 | * step if true, set the process or LWP to trap after one instr. | |
1717 | * signo if zero, clear the current signal if any. | |
1718 | * if non-zero, set the current signal to this one. | |
1719 | * | |
1720 | * Returns non-zero for success, zero for failure. | |
1721 | */ | |
1722 | ||
1723 | int | |
fba45db2 | 1724 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1725 | { |
1726 | int win; | |
1727 | int runflags; | |
1728 | ||
1729 | /* | |
1730 | * We will probably have to apply this operation to individual threads, | |
1731 | * so make sure the control file descriptor is open. | |
1732 | */ | |
1733 | ||
1734 | if (pi->ctl_fd == 0 && | |
1735 | open_procinfo_files (pi, FD_CTL) == 0) | |
1736 | { | |
1737 | return 0; | |
1738 | } | |
c906108c | 1739 | |
c3f6f71d JM |
1740 | runflags = PRCFAULT; /* always clear current fault */ |
1741 | if (step) | |
1742 | runflags |= PRSTEP; | |
1743 | if (signo == 0) | |
1744 | runflags |= PRCSIG; | |
1745 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1746 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1747 | |
c3f6f71d JM |
1748 | #ifdef NEW_PROC_API |
1749 | { | |
37de36c6 | 1750 | procfs_ctl_t cmd[2]; |
c906108c | 1751 | |
c3f6f71d JM |
1752 | cmd[0] = PCRUN; |
1753 | cmd[1] = runflags; | |
1754 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1755 | } | |
1756 | #else /* ioctl method */ | |
1757 | { | |
1758 | prrun_t prrun; | |
c906108c | 1759 | |
c3f6f71d JM |
1760 | memset (&prrun, 0, sizeof (prrun)); |
1761 | prrun.pr_flags = runflags; | |
1762 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1763 | } | |
1764 | #endif | |
c906108c | 1765 | |
c3f6f71d JM |
1766 | return win; |
1767 | } | |
c906108c | 1768 | |
c3f6f71d JM |
1769 | /* |
1770 | * Function: proc_set_traced_signals | |
1771 | * | |
1772 | * Register to trace signals in the process or LWP. | |
1773 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1774 | */ |
1775 | ||
c3f6f71d | 1776 | int |
37de36c6 | 1777 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1778 | { |
c3f6f71d JM |
1779 | int win; |
1780 | ||
1781 | /* | |
1782 | * We should never have to apply this operation to any procinfo | |
1783 | * except the one for the main process. If that ever changes | |
1784 | * for any reason, then take out the following clause and | |
1785 | * replace it with one that makes sure the ctl_fd is open. | |
1786 | */ | |
1787 | ||
1788 | if (pi->tid != 0) | |
1789 | pi = find_procinfo_or_die (pi->pid, 0); | |
1790 | ||
1791 | #ifdef NEW_PROC_API | |
1792 | { | |
1793 | struct { | |
37de36c6 | 1794 | procfs_ctl_t cmd; |
c3f6f71d | 1795 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1796 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1797 | } arg; |
c906108c | 1798 | |
c3f6f71d | 1799 | arg.cmd = PCSTRACE; |
37de36c6 | 1800 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1801 | |
c3f6f71d JM |
1802 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1803 | } | |
1804 | #else /* ioctl method */ | |
1805 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1806 | #endif | |
1807 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1808 | pi->status_valid = 0; | |
c906108c | 1809 | |
c3f6f71d JM |
1810 | if (!win) |
1811 | warning ("procfs: set_traced_signals failed"); | |
1812 | return win; | |
c906108c SS |
1813 | } |
1814 | ||
1815 | /* | |
c3f6f71d JM |
1816 | * Function: proc_set_traced_faults |
1817 | * | |
1818 | * Register to trace hardware faults in the process or LWP. | |
1819 | * Returns non-zero for success, zero for failure. | |
1820 | */ | |
c906108c | 1821 | |
c3f6f71d | 1822 | int |
fba45db2 | 1823 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1824 | { |
1825 | int win; | |
1826 | ||
1827 | /* | |
1828 | * We should never have to apply this operation to any procinfo | |
1829 | * except the one for the main process. If that ever changes | |
1830 | * for any reason, then take out the following clause and | |
1831 | * replace it with one that makes sure the ctl_fd is open. | |
1832 | */ | |
1833 | ||
1834 | if (pi->tid != 0) | |
1835 | pi = find_procinfo_or_die (pi->pid, 0); | |
1836 | ||
1837 | #ifdef NEW_PROC_API | |
1838 | { | |
1839 | struct { | |
37de36c6 | 1840 | procfs_ctl_t cmd; |
c3f6f71d JM |
1841 | /* Use char array to avoid alignment issues. */ |
1842 | char fltset[sizeof (fltset_t)]; | |
1843 | } arg; | |
c906108c | 1844 | |
c3f6f71d JM |
1845 | arg.cmd = PCSFAULT; |
1846 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1847 | |
c3f6f71d JM |
1848 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1849 | } | |
1850 | #else /* ioctl method */ | |
1851 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1852 | #endif | |
1853 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1854 | pi->status_valid = 0; | |
c906108c | 1855 | |
c3f6f71d JM |
1856 | return win; |
1857 | } | |
c5aa993b | 1858 | |
c3f6f71d JM |
1859 | /* |
1860 | * Function: proc_set_traced_sysentry | |
1861 | * | |
1862 | * Register to trace entry to system calls in the process or LWP. | |
1863 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1864 | */ |
1865 | ||
c3f6f71d | 1866 | int |
fba45db2 | 1867 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1868 | { |
c3f6f71d JM |
1869 | int win; |
1870 | ||
1871 | /* | |
1872 | * We should never have to apply this operation to any procinfo | |
1873 | * except the one for the main process. If that ever changes | |
1874 | * for any reason, then take out the following clause and | |
1875 | * replace it with one that makes sure the ctl_fd is open. | |
1876 | */ | |
1877 | ||
1878 | if (pi->tid != 0) | |
1879 | pi = find_procinfo_or_die (pi->pid, 0); | |
1880 | ||
1881 | #ifdef NEW_PROC_API | |
1882 | { | |
37de36c6 KB |
1883 | struct gdb_proc_ctl_pcsentry { |
1884 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1885 | /* Use char array to avoid alignment issues. */ |
1886 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1887 | } *argp; |
1888 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1889 | - sizeof (sysset_t) | |
1890 | + sysset_t_size (pi); | |
c3f6f71d | 1891 | |
37de36c6 | 1892 | argp = xmalloc (argp_size); |
c3f6f71d | 1893 | |
37de36c6 KB |
1894 | argp->cmd = PCSENTRY; |
1895 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1896 | ||
1897 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1898 | xfree (argp); | |
c3f6f71d JM |
1899 | } |
1900 | #else /* ioctl method */ | |
1901 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1902 | #endif | |
1903 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1904 | pi->status_valid = 0; | |
1905 | ||
1906 | return win; | |
c906108c SS |
1907 | } |
1908 | ||
1909 | /* | |
c3f6f71d JM |
1910 | * Function: proc_set_traced_sysexit |
1911 | * | |
1912 | * Register to trace exit from system calls in the process or LWP. | |
1913 | * Returns non-zero for success, zero for failure. | |
1914 | */ | |
c906108c | 1915 | |
c3f6f71d | 1916 | int |
fba45db2 | 1917 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1918 | { |
1919 | int win; | |
1920 | ||
1921 | /* | |
1922 | * We should never have to apply this operation to any procinfo | |
1923 | * except the one for the main process. If that ever changes | |
1924 | * for any reason, then take out the following clause and | |
1925 | * replace it with one that makes sure the ctl_fd is open. | |
1926 | */ | |
1927 | ||
1928 | if (pi->tid != 0) | |
1929 | pi = find_procinfo_or_die (pi->pid, 0); | |
1930 | ||
1931 | #ifdef NEW_PROC_API | |
1932 | { | |
37de36c6 KB |
1933 | struct gdb_proc_ctl_pcsexit { |
1934 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1935 | /* Use char array to avoid alignment issues. */ |
1936 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1937 | } *argp; |
1938 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1939 | - sizeof (sysset_t) | |
1940 | + sysset_t_size (pi); | |
c906108c | 1941 | |
37de36c6 | 1942 | argp = xmalloc (argp_size); |
c906108c | 1943 | |
37de36c6 KB |
1944 | argp->cmd = PCSEXIT; |
1945 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1946 | ||
1947 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1948 | xfree (argp); | |
c3f6f71d JM |
1949 | } |
1950 | #else /* ioctl method */ | |
1951 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1952 | #endif | |
1953 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1954 | pi->status_valid = 0; | |
c906108c | 1955 | |
c3f6f71d JM |
1956 | return win; |
1957 | } | |
c906108c | 1958 | |
c3f6f71d JM |
1959 | /* |
1960 | * Function: proc_set_held_signals | |
1961 | * | |
1962 | * Specify the set of blocked / held signals in the process or LWP. | |
1963 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1964 | */ |
1965 | ||
c3f6f71d | 1966 | int |
37de36c6 | 1967 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1968 | { |
c3f6f71d JM |
1969 | int win; |
1970 | ||
1971 | /* | |
1972 | * We should never have to apply this operation to any procinfo | |
1973 | * except the one for the main process. If that ever changes | |
1974 | * for any reason, then take out the following clause and | |
1975 | * replace it with one that makes sure the ctl_fd is open. | |
1976 | */ | |
1977 | ||
1978 | if (pi->tid != 0) | |
1979 | pi = find_procinfo_or_die (pi->pid, 0); | |
1980 | ||
1981 | #ifdef NEW_PROC_API | |
1982 | { | |
1983 | struct { | |
37de36c6 | 1984 | procfs_ctl_t cmd; |
c3f6f71d | 1985 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1986 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1987 | } arg; |
1988 | ||
1989 | arg.cmd = PCSHOLD; | |
37de36c6 | 1990 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1991 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1992 | } | |
c906108c | 1993 | #else |
c3f6f71d | 1994 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1995 | #endif |
c3f6f71d JM |
1996 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1997 | pi->status_valid = 0; | |
1998 | ||
1999 | return win; | |
c906108c SS |
2000 | } |
2001 | ||
2002 | /* | |
c3f6f71d JM |
2003 | * Function: proc_get_pending_signals |
2004 | * | |
2005 | * returns the set of signals that are pending in the process or LWP. | |
2006 | * Will also copy the sigset if 'save' is non-zero. | |
2007 | */ | |
c906108c | 2008 | |
37de36c6 KB |
2009 | gdb_sigset_t * |
2010 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 2011 | { |
37de36c6 | 2012 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2013 | |
2014 | /* | |
2015 | * We should never have to apply this operation to any procinfo | |
2016 | * except the one for the main process. If that ever changes | |
2017 | * for any reason, then take out the following clause and | |
2018 | * replace it with one that makes sure the ctl_fd is open. | |
2019 | */ | |
2020 | ||
2021 | if (pi->tid != 0) | |
2022 | pi = find_procinfo_or_die (pi->pid, 0); | |
2023 | ||
2024 | if (!pi->status_valid) | |
2025 | if (!proc_get_status (pi)) | |
2026 | return NULL; | |
2027 | ||
2028 | #ifdef NEW_PROC_API | |
2029 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2030 | #else | |
2031 | ret = &pi->prstatus.pr_sigpend; | |
2032 | #endif | |
2033 | if (save && ret) | |
37de36c6 | 2034 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2035 | |
c3f6f71d JM |
2036 | return ret; |
2037 | } | |
c906108c | 2038 | |
c3f6f71d JM |
2039 | /* |
2040 | * Function: proc_get_signal_actions | |
2041 | * | |
2042 | * returns the set of signal actions. | |
2043 | * Will also copy the sigactionset if 'save' is non-zero. | |
2044 | */ | |
c906108c | 2045 | |
37de36c6 KB |
2046 | gdb_sigaction_t * |
2047 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2048 | { |
37de36c6 | 2049 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2050 | |
2051 | /* | |
2052 | * We should never have to apply this operation to any procinfo | |
2053 | * except the one for the main process. If that ever changes | |
2054 | * for any reason, then take out the following clause and | |
2055 | * replace it with one that makes sure the ctl_fd is open. | |
2056 | */ | |
2057 | ||
2058 | if (pi->tid != 0) | |
2059 | pi = find_procinfo_or_die (pi->pid, 0); | |
2060 | ||
2061 | if (!pi->status_valid) | |
2062 | if (!proc_get_status (pi)) | |
2063 | return NULL; | |
2064 | ||
2065 | #ifdef NEW_PROC_API | |
2066 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2067 | #else | |
2068 | ret = &pi->prstatus.pr_action; | |
2069 | #endif | |
2070 | if (save && ret) | |
37de36c6 | 2071 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2072 | |
c3f6f71d JM |
2073 | return ret; |
2074 | } | |
c5aa993b | 2075 | |
c3f6f71d JM |
2076 | /* |
2077 | * Function: proc_get_held_signals | |
2078 | * | |
2079 | * returns the set of signals that are held / blocked. | |
2080 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2081 | */ |
2082 | ||
37de36c6 KB |
2083 | gdb_sigset_t * |
2084 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2085 | { |
37de36c6 | 2086 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2087 | |
2088 | /* | |
2089 | * We should never have to apply this operation to any procinfo | |
2090 | * except the one for the main process. If that ever changes | |
2091 | * for any reason, then take out the following clause and | |
2092 | * replace it with one that makes sure the ctl_fd is open. | |
2093 | */ | |
2094 | ||
2095 | if (pi->tid != 0) | |
2096 | pi = find_procinfo_or_die (pi->pid, 0); | |
2097 | ||
2098 | #ifdef NEW_PROC_API | |
2099 | if (!pi->status_valid) | |
2100 | if (!proc_get_status (pi)) | |
2101 | return NULL; | |
2102 | ||
2103 | #ifdef UNIXWARE | |
2104 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2105 | #else |
c3f6f71d JM |
2106 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2107 | #endif /* UNIXWARE */ | |
2108 | #else /* not NEW_PROC_API */ | |
2109 | { | |
37de36c6 | 2110 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2111 | |
2112 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2113 | ret = &sigheld; | |
2114 | } | |
2115 | #endif /* NEW_PROC_API */ | |
2116 | if (save && ret) | |
37de36c6 | 2117 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2118 | |
2119 | return ret; | |
c906108c SS |
2120 | } |
2121 | ||
c3f6f71d JM |
2122 | /* |
2123 | * Function: proc_get_traced_signals | |
2124 | * | |
2125 | * returns the set of signals that are traced / debugged. | |
2126 | * Will also copy the sigset if 'save' is non-zero. | |
2127 | */ | |
2128 | ||
37de36c6 KB |
2129 | gdb_sigset_t * |
2130 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2131 | { |
37de36c6 | 2132 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2133 | |
2134 | /* | |
2135 | * We should never have to apply this operation to any procinfo | |
2136 | * except the one for the main process. If that ever changes | |
2137 | * for any reason, then take out the following clause and | |
2138 | * replace it with one that makes sure the ctl_fd is open. | |
2139 | */ | |
2140 | ||
2141 | if (pi->tid != 0) | |
2142 | pi = find_procinfo_or_die (pi->pid, 0); | |
2143 | ||
2144 | #ifdef NEW_PROC_API | |
2145 | if (!pi->status_valid) | |
2146 | if (!proc_get_status (pi)) | |
2147 | return NULL; | |
2148 | ||
2149 | ret = &pi->prstatus.pr_sigtrace; | |
2150 | #else | |
2151 | { | |
37de36c6 | 2152 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2153 | |
2154 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2155 | ret = &sigtrace; | |
2156 | } | |
c906108c | 2157 | #endif |
c3f6f71d | 2158 | if (save && ret) |
37de36c6 | 2159 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2160 | |
c3f6f71d JM |
2161 | return ret; |
2162 | } | |
c906108c | 2163 | |
c3f6f71d JM |
2164 | /* |
2165 | * Function: proc_trace_signal | |
2166 | * | |
2167 | * Add 'signo' to the set of signals that are traced. | |
2168 | * Returns non-zero for success, zero for failure. | |
2169 | */ | |
c906108c | 2170 | |
c3f6f71d | 2171 | int |
fba45db2 | 2172 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2173 | { |
37de36c6 | 2174 | gdb_sigset_t temp; |
c3f6f71d JM |
2175 | |
2176 | /* | |
2177 | * We should never have to apply this operation to any procinfo | |
2178 | * except the one for the main process. If that ever changes | |
2179 | * for any reason, then take out the following clause and | |
2180 | * replace it with one that makes sure the ctl_fd is open. | |
2181 | */ | |
2182 | ||
2183 | if (pi->tid != 0) | |
2184 | pi = find_procinfo_or_die (pi->pid, 0); | |
2185 | ||
2186 | if (pi) | |
c906108c | 2187 | { |
c3f6f71d | 2188 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2189 | { |
c3f6f71d JM |
2190 | praddset (&temp, signo); |
2191 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
2192 | } |
2193 | } | |
c5aa993b | 2194 | |
c3f6f71d JM |
2195 | return 0; /* failure */ |
2196 | } | |
c906108c | 2197 | |
c3f6f71d JM |
2198 | /* |
2199 | * Function: proc_ignore_signal | |
2200 | * | |
2201 | * Remove 'signo' from the set of signals that are traced. | |
2202 | * Returns non-zero for success, zero for failure. | |
2203 | */ | |
c906108c | 2204 | |
c3f6f71d | 2205 | int |
fba45db2 | 2206 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2207 | { |
37de36c6 | 2208 | gdb_sigset_t temp; |
c3f6f71d JM |
2209 | |
2210 | /* | |
2211 | * We should never have to apply this operation to any procinfo | |
2212 | * except the one for the main process. If that ever changes | |
2213 | * for any reason, then take out the following clause and | |
2214 | * replace it with one that makes sure the ctl_fd is open. | |
2215 | */ | |
2216 | ||
2217 | if (pi->tid != 0) | |
2218 | pi = find_procinfo_or_die (pi->pid, 0); | |
2219 | ||
2220 | if (pi) | |
c906108c | 2221 | { |
c3f6f71d | 2222 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2223 | { |
c3f6f71d JM |
2224 | prdelset (&temp, signo); |
2225 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 2226 | } |
c906108c | 2227 | } |
c906108c | 2228 | |
c3f6f71d | 2229 | return 0; /* failure */ |
c906108c SS |
2230 | } |
2231 | ||
2232 | /* | |
c3f6f71d JM |
2233 | * Function: proc_get_traced_faults |
2234 | * | |
2235 | * returns the set of hardware faults that are traced /debugged. | |
2236 | * Will also copy the faultset if 'save' is non-zero. | |
2237 | */ | |
2238 | ||
2239 | fltset_t * | |
fba45db2 | 2240 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2241 | { |
2242 | fltset_t *ret = NULL; | |
2243 | ||
2244 | /* | |
2245 | * We should never have to apply this operation to any procinfo | |
2246 | * except the one for the main process. If that ever changes | |
2247 | * for any reason, then take out the following clause and | |
2248 | * replace it with one that makes sure the ctl_fd is open. | |
2249 | */ | |
2250 | ||
2251 | if (pi->tid != 0) | |
2252 | pi = find_procinfo_or_die (pi->pid, 0); | |
2253 | ||
2254 | #ifdef NEW_PROC_API | |
2255 | if (!pi->status_valid) | |
2256 | if (!proc_get_status (pi)) | |
2257 | return NULL; | |
2258 | ||
2259 | ret = &pi->prstatus.pr_flttrace; | |
2260 | #else | |
2261 | { | |
2262 | static fltset_t flttrace; | |
2263 | ||
2264 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2265 | ret = &flttrace; | |
2266 | } | |
2267 | #endif | |
2268 | if (save && ret) | |
2269 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2270 | |
c3f6f71d JM |
2271 | return ret; |
2272 | } | |
c906108c | 2273 | |
c3f6f71d JM |
2274 | /* |
2275 | * Function: proc_get_traced_sysentry | |
2276 | * | |
2277 | * returns the set of syscalls that are traced /debugged on entry. | |
2278 | * Will also copy the syscall set if 'save' is non-zero. | |
2279 | */ | |
c906108c | 2280 | |
c3f6f71d | 2281 | sysset_t * |
fba45db2 | 2282 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2283 | { |
2284 | sysset_t *ret = NULL; | |
2285 | ||
2286 | /* | |
2287 | * We should never have to apply this operation to any procinfo | |
2288 | * except the one for the main process. If that ever changes | |
2289 | * for any reason, then take out the following clause and | |
2290 | * replace it with one that makes sure the ctl_fd is open. | |
2291 | */ | |
2292 | ||
2293 | if (pi->tid != 0) | |
2294 | pi = find_procinfo_or_die (pi->pid, 0); | |
2295 | ||
2296 | #ifdef NEW_PROC_API | |
2297 | if (!pi->status_valid) | |
2298 | if (!proc_get_status (pi)) | |
2299 | return NULL; | |
2300 | ||
37de36c6 | 2301 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2302 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2303 | #else /* DYNAMIC_SYSCALLS */ |
2304 | { | |
2305 | static sysset_t *sysentry; | |
2306 | size_t size; | |
2307 | ||
2308 | if (!sysentry) | |
2309 | sysentry = sysset_t_alloc (pi); | |
2310 | ret = sysentry; | |
2311 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2312 | return NULL; | |
2313 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2314 | { | |
2315 | gdb_premptysysset (sysentry); | |
2316 | } | |
2317 | else | |
2318 | { | |
2319 | int rsize; | |
2320 | ||
2321 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2322 | SEEK_SET) | |
2323 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2324 | return NULL; | |
2325 | size = sysset_t_size (pi); | |
2326 | gdb_premptysysset (sysentry); | |
2327 | rsize = read (pi->status_fd, sysentry, size); | |
2328 | if (rsize < 0) | |
2329 | return NULL; | |
2330 | } | |
2331 | } | |
2332 | #endif /* DYNAMIC_SYSCALLS */ | |
2333 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2334 | { |
2335 | static sysset_t sysentry; | |
c906108c | 2336 | |
c3f6f71d JM |
2337 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2338 | ret = &sysentry; | |
2339 | } | |
37de36c6 | 2340 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2341 | if (save && ret) |
37de36c6 | 2342 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2343 | |
c3f6f71d JM |
2344 | return ret; |
2345 | } | |
c5aa993b | 2346 | |
c3f6f71d JM |
2347 | /* |
2348 | * Function: proc_get_traced_sysexit | |
2349 | * | |
2350 | * returns the set of syscalls that are traced /debugged on exit. | |
2351 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2352 | */ |
2353 | ||
c3f6f71d | 2354 | sysset_t * |
fba45db2 | 2355 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2356 | { |
c3f6f71d JM |
2357 | sysset_t * ret = NULL; |
2358 | ||
2359 | /* | |
2360 | * We should never have to apply this operation to any procinfo | |
2361 | * except the one for the main process. If that ever changes | |
2362 | * for any reason, then take out the following clause and | |
2363 | * replace it with one that makes sure the ctl_fd is open. | |
2364 | */ | |
2365 | ||
2366 | if (pi->tid != 0) | |
2367 | pi = find_procinfo_or_die (pi->pid, 0); | |
2368 | ||
2369 | #ifdef NEW_PROC_API | |
2370 | if (!pi->status_valid) | |
2371 | if (!proc_get_status (pi)) | |
2372 | return NULL; | |
2373 | ||
37de36c6 | 2374 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2375 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2376 | #else /* DYNAMIC_SYSCALLS */ |
2377 | { | |
2378 | static sysset_t *sysexit; | |
2379 | size_t size; | |
2380 | ||
2381 | if (!sysexit) | |
2382 | sysexit = sysset_t_alloc (pi); | |
2383 | ret = sysexit; | |
2384 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2385 | return NULL; | |
2386 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2387 | { | |
2388 | gdb_premptysysset (sysexit); | |
2389 | } | |
2390 | else | |
2391 | { | |
2392 | int rsize; | |
2393 | ||
2394 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2395 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2396 | return NULL; | |
2397 | size = sysset_t_size (pi); | |
2398 | gdb_premptysysset (sysexit); | |
2399 | rsize = read (pi->status_fd, sysexit, size); | |
2400 | if (rsize < 0) | |
2401 | return NULL; | |
2402 | } | |
2403 | } | |
2404 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2405 | #else |
2406 | { | |
2407 | static sysset_t sysexit; | |
c5aa993b | 2408 | |
c3f6f71d JM |
2409 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2410 | ret = &sysexit; | |
2411 | } | |
2412 | #endif | |
2413 | if (save && ret) | |
37de36c6 | 2414 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2415 | |
2416 | return ret; | |
2417 | } | |
c906108c | 2418 | |
c3f6f71d JM |
2419 | /* |
2420 | * Function: proc_clear_current_fault | |
2421 | * | |
2422 | * The current fault (if any) is cleared; the associated signal | |
2423 | * will not be sent to the process or LWP when it resumes. | |
2424 | * Returns non-zero for success, zero for failure. | |
2425 | */ | |
c906108c | 2426 | |
c3f6f71d | 2427 | int |
fba45db2 | 2428 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2429 | { |
2430 | int win; | |
2431 | ||
2432 | /* | |
2433 | * We should never have to apply this operation to any procinfo | |
2434 | * except the one for the main process. If that ever changes | |
2435 | * for any reason, then take out the following clause and | |
2436 | * replace it with one that makes sure the ctl_fd is open. | |
2437 | */ | |
2438 | ||
2439 | if (pi->tid != 0) | |
2440 | pi = find_procinfo_or_die (pi->pid, 0); | |
2441 | ||
2442 | #ifdef NEW_PROC_API | |
2443 | { | |
37de36c6 | 2444 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2445 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2446 | } | |
2447 | #else | |
2448 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2449 | #endif | |
2450 | ||
2451 | return win; | |
c906108c SS |
2452 | } |
2453 | ||
2454 | /* | |
c3f6f71d JM |
2455 | * Function: proc_set_current_signal |
2456 | * | |
2457 | * Set the "current signal" that will be delivered next to the process. | |
2458 | * NOTE: semantics are different from those of KILL. | |
2459 | * This signal will be delivered to the process or LWP | |
2460 | * immediately when it is resumed (even if the signal is held/blocked); | |
2461 | * it will NOT immediately cause another event of interest, and will NOT | |
2462 | * first trap back to the debugger. | |
2463 | * | |
2464 | * Returns non-zero for success, zero for failure. | |
2465 | */ | |
2466 | ||
2467 | int | |
fba45db2 | 2468 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2469 | { |
2470 | int win; | |
2471 | struct { | |
37de36c6 | 2472 | procfs_ctl_t cmd; |
c3f6f71d | 2473 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2474 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2475 | } arg; |
37de36c6 | 2476 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2477 | |
2478 | /* | |
2479 | * We should never have to apply this operation to any procinfo | |
2480 | * except the one for the main process. If that ever changes | |
2481 | * for any reason, then take out the following clause and | |
2482 | * replace it with one that makes sure the ctl_fd is open. | |
2483 | */ | |
2484 | ||
2485 | if (pi->tid != 0) | |
2486 | pi = find_procinfo_or_die (pi->pid, 0); | |
2487 | ||
2488 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2489 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2490 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2491 | * it messes up the current signal. Work around the kernel bug. | |
2492 | */ | |
2493 | if (signo > 0 && | |
2494 | signo == proc_cursig (pi)) | |
2495 | return 1; /* I assume this is a success? */ | |
2496 | #endif | |
2497 | ||
2498 | /* The pointer is just a type alias. */ | |
37de36c6 | 2499 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2500 | mysinfo->si_signo = signo; |
2501 | mysinfo->si_code = 0; | |
2502 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2503 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2504 | ||
2505 | #ifdef NEW_PROC_API | |
2506 | arg.cmd = PCSSIG; | |
2507 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2508 | #else | |
2509 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2510 | #endif | |
c906108c | 2511 | |
c3f6f71d JM |
2512 | return win; |
2513 | } | |
c906108c | 2514 | |
c3f6f71d JM |
2515 | /* |
2516 | * Function: proc_clear_current_signal | |
2517 | * | |
2518 | * The current signal (if any) is cleared, and | |
2519 | * is not sent to the process or LWP when it resumes. | |
2520 | * Returns non-zero for success, zero for failure. | |
2521 | */ | |
c906108c | 2522 | |
c3f6f71d | 2523 | int |
fba45db2 | 2524 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2525 | { |
2526 | int win; | |
2527 | ||
2528 | /* | |
2529 | * We should never have to apply this operation to any procinfo | |
2530 | * except the one for the main process. If that ever changes | |
2531 | * for any reason, then take out the following clause and | |
2532 | * replace it with one that makes sure the ctl_fd is open. | |
2533 | */ | |
2534 | ||
2535 | if (pi->tid != 0) | |
2536 | pi = find_procinfo_or_die (pi->pid, 0); | |
2537 | ||
2538 | #ifdef NEW_PROC_API | |
2539 | { | |
2540 | struct { | |
37de36c6 | 2541 | procfs_ctl_t cmd; |
c3f6f71d | 2542 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2543 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2544 | } arg; |
37de36c6 | 2545 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2546 | |
2547 | arg.cmd = PCSSIG; | |
2548 | /* The pointer is just a type alias. */ | |
37de36c6 | 2549 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2550 | mysinfo->si_signo = 0; |
2551 | mysinfo->si_code = 0; | |
2552 | mysinfo->si_errno = 0; | |
2553 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2554 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2555 | ||
2556 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2557 | } | |
2558 | #else | |
2559 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2560 | #endif | |
c906108c | 2561 | |
c3f6f71d JM |
2562 | return win; |
2563 | } | |
c906108c | 2564 | |
c3f6f71d JM |
2565 | /* |
2566 | * Function: proc_get_gregs | |
2567 | * | |
2568 | * Get the general registers for the process or LWP. | |
2569 | * Returns non-zero for success, zero for failure. | |
2570 | */ | |
c906108c | 2571 | |
c3f6f71d | 2572 | gdb_gregset_t * |
fba45db2 | 2573 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2574 | { |
2575 | if (!pi->status_valid || !pi->gregs_valid) | |
2576 | if (!proc_get_status (pi)) | |
2577 | return NULL; | |
2578 | ||
2579 | /* | |
2580 | * OK, sorry about the ifdef's. | |
2581 | * There's three cases instead of two, because | |
2582 | * in this instance Unixware and Solaris/RW differ. | |
2583 | */ | |
2584 | ||
2585 | #ifdef NEW_PROC_API | |
2586 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2587 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2588 | #else /* not Unixware */ | |
2589 | return &pi->prstatus.pr_lwp.pr_reg; | |
2590 | #endif /* Unixware */ | |
2591 | #else /* not NEW_PROC_API */ | |
2592 | return &pi->prstatus.pr_reg; | |
2593 | #endif /* NEW_PROC_API */ | |
2594 | } | |
c5aa993b | 2595 | |
c3f6f71d JM |
2596 | /* |
2597 | * Function: proc_get_fpregs | |
2598 | * | |
2599 | * Get the floating point registers for the process or LWP. | |
2600 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2601 | */ |
2602 | ||
c3f6f71d | 2603 | gdb_fpregset_t * |
fba45db2 | 2604 | proc_get_fpregs (procinfo *pi) |
c906108c | 2605 | { |
c3f6f71d JM |
2606 | #ifdef NEW_PROC_API |
2607 | if (!pi->status_valid || !pi->fpregs_valid) | |
2608 | if (!proc_get_status (pi)) | |
2609 | return NULL; | |
2610 | ||
2611 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2612 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2613 | #else | |
2614 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2615 | #endif /* Unixware */ | |
c5aa993b | 2616 | |
c3f6f71d JM |
2617 | #else /* not NEW_PROC_API */ |
2618 | if (pi->fpregs_valid) | |
2619 | return &pi->fpregset; /* already got 'em */ | |
2620 | else | |
c906108c | 2621 | { |
c3f6f71d JM |
2622 | if (pi->ctl_fd == 0 && |
2623 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2624 | { |
c3f6f71d | 2625 | return NULL; |
c906108c | 2626 | } |
c3f6f71d | 2627 | else |
c906108c | 2628 | { |
c3f6f71d JM |
2629 | #ifdef PIOCTGFPREG |
2630 | struct { | |
2631 | long pr_count; | |
2632 | tid_t pr_error_thread; | |
2633 | tfpregset_t thread_1; | |
2634 | } thread_fpregs; | |
2635 | ||
2636 | thread_fpregs.pr_count = 1; | |
2637 | thread_fpregs.thread_1.tid = pi->tid; | |
2638 | ||
2639 | if (pi->tid == 0 && | |
2640 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2641 | { | |
2642 | pi->fpregs_valid = 1; | |
2643 | return &pi->fpregset; /* got 'em now! */ | |
2644 | } | |
2645 | else if (pi->tid != 0 && | |
2646 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2647 | { | |
2648 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2649 | sizeof (pi->fpregset)); | |
2650 | pi->fpregs_valid = 1; | |
2651 | return &pi->fpregset; /* got 'em now! */ | |
2652 | } | |
2653 | else | |
2654 | { | |
2655 | return NULL; | |
2656 | } | |
2657 | #else | |
2658 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2659 | { | |
2660 | pi->fpregs_valid = 1; | |
2661 | return &pi->fpregset; /* got 'em now! */ | |
2662 | } | |
2663 | else | |
2664 | { | |
2665 | return NULL; | |
2666 | } | |
2667 | #endif | |
c906108c | 2668 | } |
c906108c | 2669 | } |
c3f6f71d | 2670 | #endif |
c906108c SS |
2671 | } |
2672 | ||
c3f6f71d JM |
2673 | /* |
2674 | * Function: proc_set_gregs | |
2675 | * | |
2676 | * Write the general registers back to the process or LWP. | |
2677 | * Returns non-zero for success, zero for failure. | |
2678 | */ | |
2679 | ||
2680 | int | |
fba45db2 | 2681 | proc_set_gregs (procinfo *pi) |
c906108c | 2682 | { |
c3f6f71d JM |
2683 | gdb_gregset_t *gregs; |
2684 | int win; | |
c5aa993b | 2685 | |
c3f6f71d JM |
2686 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2687 | return 0; /* get_regs has already warned */ | |
2688 | ||
2689 | if (pi->ctl_fd == 0 && | |
2690 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2691 | { |
c3f6f71d | 2692 | return 0; |
c906108c | 2693 | } |
c3f6f71d | 2694 | else |
c906108c | 2695 | { |
c3f6f71d JM |
2696 | #ifdef NEW_PROC_API |
2697 | struct { | |
37de36c6 | 2698 | procfs_ctl_t cmd; |
c3f6f71d JM |
2699 | /* Use char array to avoid alignment issues. */ |
2700 | char gregs[sizeof (gdb_gregset_t)]; | |
2701 | } arg; | |
2702 | ||
2703 | arg.cmd = PCSREG; | |
2704 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2705 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2706 | #else | |
2707 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2708 | #endif | |
c906108c | 2709 | } |
c3f6f71d JM |
2710 | |
2711 | /* Policy: writing the regs invalidates our cache. */ | |
2712 | pi->gregs_valid = 0; | |
2713 | return win; | |
c906108c SS |
2714 | } |
2715 | ||
c3f6f71d JM |
2716 | /* |
2717 | * Function: proc_set_fpregs | |
2718 | * | |
2719 | * Modify the floating point register set of the process or LWP. | |
2720 | * Returns non-zero for success, zero for failure. | |
2721 | */ | |
2722 | ||
2723 | int | |
fba45db2 | 2724 | proc_set_fpregs (procinfo *pi) |
c906108c | 2725 | { |
c3f6f71d JM |
2726 | gdb_fpregset_t *fpregs; |
2727 | int win; | |
2728 | ||
2729 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2730 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2731 | |
c3f6f71d JM |
2732 | if (pi->ctl_fd == 0 && |
2733 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2734 | { |
c3f6f71d | 2735 | return 0; |
c906108c | 2736 | } |
c3f6f71d | 2737 | else |
c906108c | 2738 | { |
c3f6f71d JM |
2739 | #ifdef NEW_PROC_API |
2740 | struct { | |
37de36c6 | 2741 | procfs_ctl_t cmd; |
c3f6f71d JM |
2742 | /* Use char array to avoid alignment issues. */ |
2743 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2744 | } arg; | |
2745 | ||
2746 | arg.cmd = PCSFPREG; | |
2747 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2748 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2749 | #else | |
2750 | #ifdef PIOCTSFPREG | |
2751 | if (pi->tid == 0) | |
2752 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2753 | else | |
2754 | { | |
2755 | struct { | |
2756 | long pr_count; | |
2757 | tid_t pr_error_thread; | |
2758 | tfpregset_t thread_1; | |
2759 | } thread_fpregs; | |
2760 | ||
2761 | thread_fpregs.pr_count = 1; | |
2762 | thread_fpregs.thread_1.tid = pi->tid; | |
2763 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2764 | sizeof (*fpregs)); | |
2765 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2766 | } | |
2767 | #else | |
2768 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2769 | #endif /* osf PIOCTSFPREG */ | |
2770 | #endif /* NEW_PROC_API */ | |
c906108c | 2771 | } |
c3f6f71d JM |
2772 | |
2773 | /* Policy: writing the regs invalidates our cache. */ | |
2774 | pi->fpregs_valid = 0; | |
2775 | return win; | |
c906108c SS |
2776 | } |
2777 | ||
2778 | /* | |
c3f6f71d JM |
2779 | * Function: proc_kill |
2780 | * | |
2781 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2782 | * Returns non-zero for success, zero for failure. | |
2783 | */ | |
c906108c | 2784 | |
c3f6f71d | 2785 | int |
fba45db2 | 2786 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2787 | { |
2788 | int win; | |
c906108c | 2789 | |
c3f6f71d JM |
2790 | /* |
2791 | * We might conceivably apply this operation to an LWP, and | |
2792 | * the LWP's ctl file descriptor might not be open. | |
2793 | */ | |
c906108c | 2794 | |
c3f6f71d JM |
2795 | if (pi->ctl_fd == 0 && |
2796 | open_procinfo_files (pi, FD_CTL) == 0) | |
2797 | { | |
2798 | return 0; | |
2799 | } | |
2800 | else | |
2801 | { | |
2802 | #ifdef NEW_PROC_API | |
37de36c6 | 2803 | procfs_ctl_t cmd[2]; |
c906108c | 2804 | |
c3f6f71d JM |
2805 | cmd[0] = PCKILL; |
2806 | cmd[1] = signo; | |
2807 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2808 | #else /* ioctl method */ | |
2809 | /* FIXME: do I need the Alpha OSF fixups present in | |
2810 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2811 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2812 | #endif | |
2813 | } | |
c906108c | 2814 | |
c3f6f71d JM |
2815 | return win; |
2816 | } | |
c906108c | 2817 | |
c3f6f71d JM |
2818 | /* |
2819 | * Function: proc_parent_pid | |
2820 | * | |
2821 | * Find the pid of the process that started this one. | |
2822 | * Returns the parent process pid, or zero. | |
c906108c SS |
2823 | */ |
2824 | ||
c3f6f71d | 2825 | int |
fba45db2 | 2826 | proc_parent_pid (procinfo *pi) |
c906108c | 2827 | { |
c3f6f71d JM |
2828 | /* |
2829 | * We should never have to apply this operation to any procinfo | |
2830 | * except the one for the main process. If that ever changes | |
2831 | * for any reason, then take out the following clause and | |
2832 | * replace it with one that makes sure the ctl_fd is open. | |
2833 | */ | |
2834 | ||
2835 | if (pi->tid != 0) | |
2836 | pi = find_procinfo_or_die (pi->pid, 0); | |
2837 | ||
2838 | if (!pi->status_valid) | |
2839 | if (!proc_get_status (pi)) | |
2840 | return 0; | |
c5aa993b | 2841 | |
c3f6f71d JM |
2842 | return pi->prstatus.pr_ppid; |
2843 | } | |
2844 | ||
2845 | ||
9a043c1d AC |
2846 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2847 | (a.k.a void pointer)! */ | |
2848 | ||
2849 | static void * | |
2850 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2851 | { | |
2852 | void *ptr; | |
2853 | ||
2854 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr)); | |
2855 | ADDRESS_TO_POINTER (builtin_type_void_data_ptr, &ptr, addr); | |
2856 | return ptr; | |
2857 | } | |
2858 | ||
c3f6f71d JM |
2859 | /* |
2860 | * Function: proc_set_watchpoint | |
2861 | * | |
2862 | */ | |
2863 | ||
2864 | int | |
fba45db2 | 2865 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d JM |
2866 | { |
2867 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2868 | return 0; | |
2869 | #else | |
2870 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2871 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2872 | return 0; | |
2873 | #else | |
2874 | struct { | |
37de36c6 | 2875 | procfs_ctl_t cmd; |
c3f6f71d JM |
2876 | char watch[sizeof (prwatch_t)]; |
2877 | } arg; | |
2878 | prwatch_t *pwatch; | |
2879 | ||
2880 | pwatch = (prwatch_t *) &arg.watch; | |
9a043c1d AC |
2881 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2882 | convert a target address into something that can be stored in a | |
2883 | native data structure. */ | |
831e682e | 2884 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
9a043c1d | 2885 | pwatch->pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2886 | #else |
9a043c1d | 2887 | pwatch->pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2888 | #endif |
c3f6f71d JM |
2889 | pwatch->pr_size = len; |
2890 | pwatch->pr_wflags = wflags; | |
2891 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2892 | arg.cmd = PCWATCH; | |
2893 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2894 | #else | |
2895 | #if defined (PIOCSWATCH) | |
2896 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2897 | #else | |
2898 | return 0; /* Fail */ | |
2899 | #endif | |
2900 | #endif | |
2901 | #endif | |
2902 | #endif | |
c906108c SS |
2903 | } |
2904 | ||
c3f6f71d | 2905 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2906 | |
c3f6f71d | 2907 | #include <sys/sysi86.h> |
c906108c | 2908 | |
c3f6f71d JM |
2909 | /* |
2910 | * Function: proc_get_LDT_entry | |
2911 | * | |
2912 | * Inputs: | |
2913 | * procinfo *pi; | |
2914 | * int key; | |
2915 | * | |
2916 | * The 'key' is actually the value of the lower 16 bits of | |
2917 | * the GS register for the LWP that we're interested in. | |
2918 | * | |
2919 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2920 | */ |
2921 | ||
c3f6f71d | 2922 | struct ssd * |
fba45db2 | 2923 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2924 | { |
c3f6f71d JM |
2925 | static struct ssd *ldt_entry = NULL; |
2926 | #ifdef NEW_PROC_API | |
2927 | char pathname[MAX_PROC_NAME_SIZE]; | |
2928 | struct cleanup *old_chain = NULL; | |
2929 | int fd; | |
2930 | ||
2931 | /* Allocate space for one LDT entry. | |
2932 | This alloc must persist, because we return a pointer to it. */ | |
2933 | if (ldt_entry == NULL) | |
2934 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2935 | ||
2936 | /* Open the file descriptor for the LDT table. */ | |
2937 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2938 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2939 | { |
c3f6f71d JM |
2940 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2941 | return NULL; | |
c906108c | 2942 | } |
c3f6f71d | 2943 | /* Make sure it gets closed again! */ |
004527cb | 2944 | old_chain = make_cleanup_close (fd); |
c906108c | 2945 | |
c3f6f71d JM |
2946 | /* Now 'read' thru the table, find a match and return it. */ |
2947 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2948 | { |
c3f6f71d JM |
2949 | if (ldt_entry->sel == 0 && |
2950 | ldt_entry->bo == 0 && | |
2951 | ldt_entry->acc1 == 0 && | |
2952 | ldt_entry->acc2 == 0) | |
2953 | break; /* end of table */ | |
2954 | /* If key matches, return this entry. */ | |
2955 | if (ldt_entry->sel == key) | |
2956 | return ldt_entry; | |
c906108c | 2957 | } |
c3f6f71d JM |
2958 | /* Loop ended, match not found. */ |
2959 | return NULL; | |
2960 | #else | |
2961 | int nldt, i; | |
2962 | static int nalloc = 0; | |
c906108c | 2963 | |
c3f6f71d JM |
2964 | /* Get the number of LDT entries. */ |
2965 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2966 | { |
c3f6f71d JM |
2967 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2968 | return NULL; | |
c906108c SS |
2969 | } |
2970 | ||
c3f6f71d JM |
2971 | /* Allocate space for the number of LDT entries. */ |
2972 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2973 | if (nldt > nalloc) | |
c906108c | 2974 | { |
c3f6f71d JM |
2975 | ldt_entry = (struct ssd *) |
2976 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
2977 | nalloc = nldt; | |
2978 | } | |
2979 | ||
2980 | /* Read the whole table in one gulp. */ | |
2981 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2982 | { | |
2983 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2984 | return NULL; | |
c906108c SS |
2985 | } |
2986 | ||
c3f6f71d JM |
2987 | /* Search the table and return the (first) entry matching 'key'. */ |
2988 | for (i = 0; i < nldt; i++) | |
2989 | if (ldt_entry[i].sel == key) | |
2990 | return &ldt_entry[i]; | |
c906108c | 2991 | |
c3f6f71d JM |
2992 | /* Loop ended, match not found. */ |
2993 | return NULL; | |
2994 | #endif | |
2995 | } | |
c906108c | 2996 | |
c3f6f71d | 2997 | #endif /* TM_I386SOL2_H */ |
c906108c | 2998 | |
c3f6f71d | 2999 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 3000 | |
c3f6f71d | 3001 | /* =================== Thread "MODULE" =================== */ |
c906108c | 3002 | |
c3f6f71d JM |
3003 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
3004 | since there is a different way to do threads on every OS. */ | |
c906108c | 3005 | |
c3f6f71d JM |
3006 | /* |
3007 | * Function: proc_get_nthreads | |
3008 | * | |
3009 | * Return the number of threads for the process | |
3010 | */ | |
c906108c | 3011 | |
c3f6f71d JM |
3012 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
3013 | /* | |
3014 | * OSF version | |
3015 | */ | |
3016 | int | |
fba45db2 | 3017 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
3018 | { |
3019 | int nthreads = 0; | |
c906108c | 3020 | |
c3f6f71d JM |
3021 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3022 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3023 | |
c3f6f71d | 3024 | return nthreads; |
c906108c SS |
3025 | } |
3026 | ||
c3f6f71d JM |
3027 | #else |
3028 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3029 | /* | |
3030 | * Solaris and Unixware version | |
3031 | */ | |
3032 | int | |
fba45db2 | 3033 | proc_get_nthreads (procinfo *pi) |
c906108c | 3034 | { |
c3f6f71d JM |
3035 | if (!pi->status_valid) |
3036 | if (!proc_get_status (pi)) | |
3037 | return 0; | |
c5aa993b | 3038 | |
c3f6f71d JM |
3039 | /* |
3040 | * NEW_PROC_API: only works for the process procinfo, | |
3041 | * because the LWP procinfos do not get prstatus filled in. | |
3042 | */ | |
3043 | #ifdef NEW_PROC_API | |
3044 | if (pi->tid != 0) /* find the parent process procinfo */ | |
3045 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3046 | #endif |
c3f6f71d | 3047 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3048 | } |
3049 | ||
c3f6f71d JM |
3050 | #else |
3051 | /* | |
3052 | * Default version | |
3053 | */ | |
3054 | int | |
fba45db2 | 3055 | proc_get_nthreads (procinfo *pi) |
c906108c | 3056 | { |
c3f6f71d JM |
3057 | return 0; |
3058 | } | |
3059 | #endif | |
3060 | #endif | |
3061 | ||
3062 | /* | |
3063 | * Function: proc_get_current_thread (LWP version) | |
3064 | * | |
3065 | * Return the ID of the thread that had an event of interest. | |
3066 | * (ie. the one that hit a breakpoint or other traced event). | |
3067 | * All other things being equal, this should be the ID of a | |
3068 | * thread that is currently executing. | |
3069 | */ | |
3070 | ||
3071 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3072 | /* | |
3073 | * Solaris and Unixware version | |
3074 | */ | |
3075 | int | |
fba45db2 | 3076 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3077 | { |
3078 | /* | |
3079 | * Note: this should be applied to the root procinfo for the process, | |
3080 | * not to the procinfo for an LWP. If applied to the procinfo for | |
3081 | * an LWP, it will simply return that LWP's ID. In that case, | |
3082 | * find the parent process procinfo. | |
3083 | */ | |
3084 | ||
3085 | if (pi->tid != 0) | |
3086 | pi = find_procinfo_or_die (pi->pid, 0); | |
3087 | ||
3088 | if (!pi->status_valid) | |
3089 | if (!proc_get_status (pi)) | |
3090 | return 0; | |
3091 | ||
3092 | #ifdef NEW_PROC_API | |
3093 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3094 | #else |
c3f6f71d | 3095 | return pi->prstatus.pr_who; |
c906108c | 3096 | #endif |
c3f6f71d | 3097 | } |
c906108c | 3098 | |
c3f6f71d JM |
3099 | #else |
3100 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3101 | /* | |
3102 | * OSF version | |
3103 | */ | |
3104 | int | |
fba45db2 | 3105 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3106 | { |
3107 | #if 0 /* FIXME: not ready for prime time? */ | |
3108 | return pi->prstatus.pr_tid; | |
3109 | #else | |
3110 | return 0; | |
3111 | #endif | |
c906108c SS |
3112 | } |
3113 | ||
c3f6f71d JM |
3114 | #else |
3115 | /* | |
3116 | * Default version | |
3117 | */ | |
3118 | int | |
fba45db2 | 3119 | proc_get_current_thread (procinfo *pi) |
c906108c | 3120 | { |
c3f6f71d JM |
3121 | return 0; |
3122 | } | |
3123 | ||
3124 | #endif | |
3125 | #endif | |
c906108c | 3126 | |
c3f6f71d JM |
3127 | /* |
3128 | * Function: proc_update_threads | |
3129 | * | |
3130 | * Discover the IDs of all the threads within the process, and | |
3131 | * create a procinfo for each of them (chained to the parent). | |
3132 | * | |
3133 | * This unfortunately requires a different method on every OS. | |
3134 | * | |
3135 | * Return: non-zero for success, zero for failure. | |
3136 | */ | |
c906108c | 3137 | |
c3f6f71d | 3138 | int |
fba45db2 | 3139 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3140 | { |
3141 | if (thread && parent) /* sanity */ | |
c906108c | 3142 | { |
c3f6f71d JM |
3143 | thread->status_valid = 0; |
3144 | if (!proc_get_status (thread)) | |
3145 | destroy_one_procinfo (&parent->thread_list, thread); | |
3146 | } | |
3147 | return 0; /* keep iterating */ | |
3148 | } | |
c5aa993b | 3149 | |
c3f6f71d JM |
3150 | #if defined (PIOCLSTATUS) |
3151 | /* | |
3152 | * Solaris 2.5 (ioctl) version | |
3153 | */ | |
3154 | int | |
fba45db2 | 3155 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3156 | { |
3157 | gdb_prstatus_t *prstatus; | |
3158 | struct cleanup *old_chain = NULL; | |
3159 | procinfo *thread; | |
3160 | int nlwp, i; | |
3161 | ||
3162 | /* | |
3163 | * We should never have to apply this operation to any procinfo | |
3164 | * except the one for the main process. If that ever changes | |
3165 | * for any reason, then take out the following clause and | |
3166 | * replace it with one that makes sure the ctl_fd is open. | |
3167 | */ | |
3168 | ||
3169 | if (pi->tid != 0) | |
3170 | pi = find_procinfo_or_die (pi->pid, 0); | |
3171 | ||
3172 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3173 | ||
3174 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3175 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3176 | ||
3c37485b | 3177 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3178 | |
b8c9b27d | 3179 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3180 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3181 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3182 | ||
3183 | /* Skip element zero, which represents the process as a whole. */ | |
3184 | for (i = 1; i < nlwp + 1; i++) | |
3185 | { | |
3186 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3187 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3188 | |
c3f6f71d JM |
3189 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3190 | thread->status_valid = 1; | |
3191 | } | |
3192 | pi->threads_valid = 1; | |
3193 | do_cleanups (old_chain); | |
3194 | return 1; | |
3195 | } | |
3196 | #else | |
3197 | #ifdef NEW_PROC_API | |
3198 | /* | |
3199 | * Unixware and Solaris 6 (and later) version | |
3200 | */ | |
004527cb AC |
3201 | static void |
3202 | do_closedir_cleanup (void *dir) | |
3203 | { | |
3204 | closedir (dir); | |
3205 | } | |
3206 | ||
c3f6f71d | 3207 | int |
fba45db2 | 3208 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3209 | { |
3210 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3211 | struct dirent *direntry; | |
3212 | struct cleanup *old_chain = NULL; | |
3213 | procinfo *thread; | |
3214 | DIR *dirp; | |
3215 | int lwpid; | |
3216 | ||
3217 | /* | |
3218 | * We should never have to apply this operation to any procinfo | |
3219 | * except the one for the main process. If that ever changes | |
3220 | * for any reason, then take out the following clause and | |
3221 | * replace it with one that makes sure the ctl_fd is open. | |
3222 | */ | |
3223 | ||
3224 | if (pi->tid != 0) | |
3225 | pi = find_procinfo_or_die (pi->pid, 0); | |
3226 | ||
3227 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3228 | ||
3229 | /* | |
3230 | * Unixware | |
3231 | * | |
3232 | * Note: this brute-force method is the only way I know of | |
3233 | * to accomplish this task on Unixware. This method will | |
3234 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3235 | * and more elegant way to do this on Solaris, but the margins | |
3236 | * of this manuscript are too small to write it here... ;-) | |
3237 | */ | |
3238 | ||
3239 | strcpy (pathname, pi->pathname); | |
3240 | strcat (pathname, "/lwp"); | |
3241 | if ((dirp = opendir (pathname)) == NULL) | |
3242 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3243 | ||
004527cb | 3244 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3245 | while ((direntry = readdir (dirp)) != NULL) |
3246 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3247 | { | |
3248 | lwpid = atoi (&direntry->d_name[0]); | |
3249 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3250 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3251 | } | |
3252 | pi->threads_valid = 1; | |
3253 | do_cleanups (old_chain); | |
3254 | return 1; | |
3255 | } | |
3256 | #else | |
3257 | #ifdef PIOCTLIST | |
3258 | /* | |
3259 | * OSF version | |
3260 | */ | |
3261 | int | |
fba45db2 | 3262 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3263 | { |
3264 | int nthreads, i; | |
3265 | tid_t *threads; | |
3266 | ||
3267 | /* | |
3268 | * We should never have to apply this operation to any procinfo | |
3269 | * except the one for the main process. If that ever changes | |
3270 | * for any reason, then take out the following clause and | |
3271 | * replace it with one that makes sure the ctl_fd is open. | |
3272 | */ | |
3273 | ||
3274 | if (pi->tid != 0) | |
3275 | pi = find_procinfo_or_die (pi->pid, 0); | |
3276 | ||
3277 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3278 | ||
3279 | nthreads = proc_get_nthreads (pi); | |
3280 | if (nthreads < 2) | |
3281 | return 0; /* nothing to do for 1 or fewer threads */ | |
3282 | ||
3c37485b | 3283 | threads = xmalloc (nthreads * sizeof (tid_t)); |
c3f6f71d JM |
3284 | |
3285 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3286 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3287 | ||
3288 | for (i = 0; i < nthreads; i++) | |
3289 | { | |
3290 | if (!find_procinfo (pi->pid, threads[i])) | |
3291 | if (!create_procinfo (pi->pid, threads[i])) | |
3292 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3293 | } |
c3f6f71d JM |
3294 | pi->threads_valid = 1; |
3295 | return 1; | |
c906108c | 3296 | } |
c3f6f71d JM |
3297 | #else |
3298 | /* | |
3299 | * Default version | |
3300 | */ | |
3301 | int | |
fba45db2 | 3302 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3303 | { |
3304 | return 0; | |
3305 | } | |
3306 | #endif /* OSF PIOCTLIST */ | |
3307 | #endif /* NEW_PROC_API */ | |
3308 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3309 | |
c3f6f71d JM |
3310 | /* |
3311 | * Function: proc_iterate_over_threads | |
3312 | * | |
3313 | * Description: | |
3314 | * Given a pointer to a function, call that function once | |
3315 | * for each lwp in the procinfo list, until the function | |
3316 | * returns non-zero, in which event return the value | |
3317 | * returned by the function. | |
3318 | * | |
3319 | * Note: this function does NOT call update_threads. | |
3320 | * If you want to discover new threads first, you must | |
3321 | * call that function explicitly. This function just makes | |
3322 | * a quick pass over the currently-known procinfos. | |
3323 | * | |
3324 | * Arguments: | |
3325 | * pi - parent process procinfo | |
3326 | * func - per-thread function | |
3327 | * ptr - opaque parameter for function. | |
3328 | * | |
3329 | * Return: | |
3330 | * First non-zero return value from the callee, or zero. | |
3331 | */ | |
3332 | ||
3333 | int | |
d0849a9a KB |
3334 | proc_iterate_over_threads (procinfo *pi, |
3335 | int (*func) (procinfo *, procinfo *, void *), | |
3336 | void *ptr) | |
c906108c | 3337 | { |
c3f6f71d JM |
3338 | procinfo *thread, *next; |
3339 | int retval = 0; | |
c906108c | 3340 | |
c3f6f71d JM |
3341 | /* |
3342 | * We should never have to apply this operation to any procinfo | |
3343 | * except the one for the main process. If that ever changes | |
3344 | * for any reason, then take out the following clause and | |
3345 | * replace it with one that makes sure the ctl_fd is open. | |
3346 | */ | |
3347 | ||
3348 | if (pi->tid != 0) | |
3349 | pi = find_procinfo_or_die (pi->pid, 0); | |
3350 | ||
3351 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3352 | { |
c3f6f71d JM |
3353 | next = thread->next; /* in case thread is destroyed */ |
3354 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3355 | break; | |
c906108c | 3356 | } |
c3f6f71d JM |
3357 | |
3358 | return retval; | |
c906108c SS |
3359 | } |
3360 | ||
c3f6f71d JM |
3361 | /* =================== END, Thread "MODULE" =================== */ |
3362 | ||
3363 | /* =================== END, /proc "MODULE" =================== */ | |
3364 | ||
3365 | /* =================== GDB "MODULE" =================== */ | |
3366 | ||
3367 | /* | |
3368 | * Here are all of the gdb target vector functions and their friends. | |
3369 | */ | |
3370 | ||
39f77062 | 3371 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3372 | static void do_detach (int signo); |
37de36c6 | 3373 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
c3f6f71d JM |
3374 | |
3375 | /* | |
3376 | * Function: procfs_debug_inferior | |
3377 | * | |
3378 | * Sets up the inferior to be debugged. | |
3379 | * Registers to trace signals, hardware faults, and syscalls. | |
3380 | * Note: does not set RLC flag: caller may want to customize that. | |
3381 | * | |
3382 | * Returns: zero for success (note! unlike most functions in this module) | |
3383 | * On failure, returns the LINE NUMBER where it failed! | |
3384 | */ | |
3385 | ||
3386 | static int | |
fba45db2 | 3387 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3388 | { |
c3f6f71d | 3389 | fltset_t traced_faults; |
37de36c6 KB |
3390 | gdb_sigset_t traced_signals; |
3391 | sysset_t *traced_syscall_entries; | |
3392 | sysset_t *traced_syscall_exits; | |
3393 | int status; | |
c906108c | 3394 | |
c3f6f71d JM |
3395 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3396 | /* On some systems (OSF), we don't trace hardware faults. | |
3397 | Apparently it's enough that we catch them as signals. | |
3398 | Wonder why we don't just do that in general? */ | |
3399 | premptyset (&traced_faults); /* don't trace faults. */ | |
3400 | #else | |
3401 | /* Register to trace hardware faults in the child. */ | |
3402 | prfillset (&traced_faults); /* trace all faults... */ | |
3403 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3404 | #endif | |
3405 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3406 | return __LINE__; | |
c906108c | 3407 | |
c3f6f71d JM |
3408 | /* Register to trace selected signals in the child. */ |
3409 | premptyset (&traced_signals); | |
3410 | if (!register_gdb_signals (pi, &traced_signals)) | |
3411 | return __LINE__; | |
3412 | ||
37de36c6 | 3413 | |
c3f6f71d | 3414 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3415 | traced_syscall_entries = sysset_t_alloc (pi); |
3416 | gdb_premptysysset (traced_syscall_entries); | |
3417 | #ifdef SYS_exit | |
3418 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3419 | #endif | |
c3f6f71d | 3420 | #ifdef SYS_lwpexit |
37de36c6 | 3421 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3422 | #endif |
3423 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3424 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3425 | #endif | |
3426 | #ifdef DYNAMIC_SYSCALLS | |
3427 | { | |
3428 | int callnum = find_syscall (pi, "_exit"); | |
3429 | if (callnum >= 0) | |
3430 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3431 | } | |
c906108c SS |
3432 | #endif |
3433 | ||
37de36c6 KB |
3434 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3435 | xfree (traced_syscall_entries); | |
3436 | if (!status) | |
c3f6f71d JM |
3437 | return __LINE__; |
3438 | ||
3439 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3440 | /* OSF method for tracing exec syscalls. Quoting: | |
3441 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3442 | exits from exec system calls because of the user level loader. */ | |
3443 | /* FIXME: make nice and maybe move into an access function. */ | |
3444 | { | |
3445 | int prfs_flags; | |
3446 | ||
3447 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3448 | return __LINE__; | |
3449 | ||
3450 | prfs_flags |= PRFS_STOPEXEC; | |
3451 | ||
3452 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3453 | return __LINE__; | |
3454 | } | |
3455 | #else /* not PRFS_STOPEXEC */ | |
3456 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3457 | /* GW: Rationale... | |
3458 | Not all systems with /proc have all the exec* syscalls with the same | |
3459 | names. On the SGI, for example, there is no SYS_exec, but there | |
3460 | *is* a SYS_execv. So, we try to account for that. */ | |
3461 | ||
37de36c6 KB |
3462 | traced_syscall_exits = sysset_t_alloc (pi); |
3463 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3464 | #ifdef SYS_exec |
37de36c6 | 3465 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3466 | #endif |
3467 | #ifdef SYS_execve | |
37de36c6 | 3468 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3469 | #endif |
3470 | #ifdef SYS_execv | |
37de36c6 | 3471 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3472 | #endif |
c5aa993b | 3473 | |
c3f6f71d | 3474 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3475 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3476 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3477 | #endif |
c5aa993b | 3478 | |
c3f6f71d | 3479 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3480 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3481 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3482 | #endif |
c5aa993b | 3483 | |
37de36c6 KB |
3484 | #ifdef DYNAMIC_SYSCALLS |
3485 | { | |
3486 | int callnum = find_syscall (pi, "execve"); | |
3487 | if (callnum >= 0) | |
3488 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3489 | callnum = find_syscall (pi, "ra_execve"); | |
3490 | if (callnum >= 0) | |
3491 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3492 | } | |
3493 | #endif | |
c906108c | 3494 | |
37de36c6 KB |
3495 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3496 | xfree (traced_syscall_exits); | |
3497 | if (!status) | |
c3f6f71d JM |
3498 | return __LINE__; |
3499 | ||
3500 | #endif /* PRFS_STOPEXEC */ | |
3501 | return 0; | |
c906108c SS |
3502 | } |
3503 | ||
c3f6f71d | 3504 | static void |
fba45db2 | 3505 | procfs_attach (char *args, int from_tty) |
c906108c | 3506 | { |
c3f6f71d JM |
3507 | char *exec_file; |
3508 | int pid; | |
3509 | ||
3510 | if (!args) | |
3511 | error_no_arg ("process-id to attach"); | |
3512 | ||
3513 | pid = atoi (args); | |
3514 | if (pid == getpid ()) | |
3515 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3516 | |
c3f6f71d | 3517 | if (from_tty) |
c906108c | 3518 | { |
c3f6f71d JM |
3519 | exec_file = get_exec_file (0); |
3520 | ||
3521 | if (exec_file) | |
3522 | printf_filtered ("Attaching to program `%s', %s\n", | |
39f77062 | 3523 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3524 | else |
39f77062 KB |
3525 | printf_filtered ("Attaching to %s\n", |
3526 | target_pid_to_str (pid_to_ptid (pid))); | |
c3f6f71d JM |
3527 | |
3528 | fflush (stdout); | |
c906108c | 3529 | } |
39f77062 | 3530 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
c3f6f71d JM |
3531 | push_target (&procfs_ops); |
3532 | } | |
3533 | ||
3534 | static void | |
fba45db2 | 3535 | procfs_detach (char *args, int from_tty) |
c3f6f71d JM |
3536 | { |
3537 | char *exec_file; | |
3538 | int signo = 0; | |
3539 | ||
3540 | if (from_tty) | |
c906108c | 3541 | { |
c3f6f71d JM |
3542 | exec_file = get_exec_file (0); |
3543 | if (exec_file == 0) | |
3544 | exec_file = ""; | |
3545 | printf_filtered ("Detaching from program: %s %s\n", | |
39f77062 | 3546 | exec_file, target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3547 | fflush (stdout); |
c906108c | 3548 | } |
c3f6f71d JM |
3549 | if (args) |
3550 | signo = atoi (args); | |
3551 | ||
3552 | do_detach (signo); | |
39f77062 | 3553 | inferior_ptid = null_ptid; |
c3f6f71d | 3554 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ |
c906108c SS |
3555 | } |
3556 | ||
39f77062 KB |
3557 | static ptid_t |
3558 | do_attach (ptid_t ptid) | |
c906108c | 3559 | { |
c3f6f71d JM |
3560 | procinfo *pi; |
3561 | int fail; | |
3562 | ||
39f77062 | 3563 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
c3f6f71d JM |
3564 | perror ("procfs: out of memory in 'attach'"); |
3565 | ||
3566 | if (!open_procinfo_files (pi, FD_CTL)) | |
3567 | { | |
3568 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3569 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
39f77062 | 3570 | PIDGET (ptid)); |
c3f6f71d JM |
3571 | dead_procinfo (pi, errmsg, NOKILL); |
3572 | } | |
c906108c | 3573 | |
c3f6f71d JM |
3574 | /* Stop the process (if it isn't already stopped). */ |
3575 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3576 | { |
c3f6f71d JM |
3577 | pi->was_stopped = 1; |
3578 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3579 | } |
3580 | else | |
3581 | { | |
c3f6f71d JM |
3582 | pi->was_stopped = 0; |
3583 | /* Set the process to run again when we close it. */ | |
3584 | if (!proc_set_run_on_last_close (pi)) | |
3585 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3586 | ||
3587 | /* Now stop the process. */ | |
3588 | if (!proc_stop_process (pi)) | |
3589 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3590 | pi->ignore_next_sigstop = 1; | |
c906108c | 3591 | } |
c3f6f71d JM |
3592 | /* Save some of the /proc state to be restored if we detach. */ |
3593 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3594 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3595 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3596 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3597 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3598 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3599 | NOKILL); | |
37de36c6 | 3600 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3601 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
3602 | NOKILL); | |
3603 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3604 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3605 | ||
3606 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3607 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3608 | ||
3609 | /* Let GDB know that the inferior was attached. */ | |
3610 | attach_flag = 1; | |
3611 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3612 | } |
3613 | ||
3614 | static void | |
fba45db2 | 3615 | do_detach (int signo) |
c906108c | 3616 | { |
c3f6f71d | 3617 | procinfo *pi; |
c906108c | 3618 | |
c3f6f71d | 3619 | /* Find procinfo for the main process */ |
39f77062 | 3620 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3621 | if (signo) |
3622 | if (!proc_set_current_signal (pi, signo)) | |
3623 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3624 | |
c3f6f71d JM |
3625 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3626 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3627 | |
c3f6f71d JM |
3628 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3629 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3630 | ||
37de36c6 | 3631 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3632 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3633 | ||
37de36c6 | 3634 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3635 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3636 | ||
3637 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3638 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3639 | ||
3640 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3641 | if (signo || !(pi->was_stopped) || | |
3642 | query ("Was stopped when attached, make it runnable again? ")) | |
3643 | { | |
3644 | /* Clear any pending signal. */ | |
3645 | if (!proc_clear_current_fault (pi)) | |
3646 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3647 | ||
1a303dec MS |
3648 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3649 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3650 | ||
c3f6f71d JM |
3651 | if (!proc_set_run_on_last_close (pi)) |
3652 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3653 | } | |
3654 | ||
3655 | attach_flag = 0; | |
3656 | destroy_procinfo (pi); | |
c906108c SS |
3657 | } |
3658 | ||
c3f6f71d JM |
3659 | /* |
3660 | * fetch_registers | |
3661 | * | |
3662 | * Since the /proc interface cannot give us individual registers, | |
3663 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3664 | * This results in the possibility that we will do unnecessarily many | |
3665 | * fetches, since we may be called repeatedly for individual registers. | |
3666 | * So we cache the results, and mark the cache invalid when the process | |
3667 | * is resumed. | |
3668 | */ | |
3669 | ||
c906108c | 3670 | static void |
fba45db2 | 3671 | procfs_fetch_registers (int regno) |
c906108c | 3672 | { |
c3f6f71d JM |
3673 | gdb_fpregset_t *fpregs; |
3674 | gdb_gregset_t *gregs; | |
3675 | procinfo *pi; | |
3676 | int pid; | |
3677 | int tid; | |
c906108c | 3678 | |
39f77062 KB |
3679 | pid = PIDGET (inferior_ptid); |
3680 | tid = TIDGET (inferior_ptid); | |
c3f6f71d JM |
3681 | |
3682 | /* First look up procinfo for the main process. */ | |
3683 | pi = find_procinfo_or_die (pid, 0); | |
3684 | ||
3685 | /* If the event thread is not the same as GDB's requested thread | |
39f77062 | 3686 | (ie. inferior_ptid), then look up procinfo for the requested |
c3f6f71d JM |
3687 | thread. */ |
3688 | if ((tid != 0) && | |
3689 | (tid != proc_get_current_thread (pi))) | |
3690 | pi = find_procinfo_or_die (pid, tid); | |
3691 | ||
3692 | if (pi == NULL) | |
3693 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
39f77062 | 3694 | target_pid_to_str (inferior_ptid)); |
c3f6f71d JM |
3695 | |
3696 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3697 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3698 | ||
3699 | supply_gregset (gregs); | |
3700 | ||
60054393 MS |
3701 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3702 | { | |
3703 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3704 | regno == PC_REGNUM || | |
3705 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3706 | regno == FP_REGNUM || | |
3707 | regno == SP_REGNUM) | |
3708 | return; /* not a floating point register */ | |
c5aa993b | 3709 | |
60054393 MS |
3710 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3711 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3712 | |
60054393 MS |
3713 | supply_fpregset (fpregs); |
3714 | } | |
c906108c SS |
3715 | } |
3716 | ||
c3f6f71d JM |
3717 | /* Get ready to modify the registers array. On machines which store |
3718 | individual registers, this doesn't need to do anything. On | |
3719 | machines which store all the registers in one fell swoop, such as | |
3720 | /proc, this makes sure that registers contains all the registers | |
3721 | from the program being debugged. */ | |
3722 | ||
c906108c | 3723 | static void |
fba45db2 | 3724 | procfs_prepare_to_store (void) |
c906108c | 3725 | { |
c3f6f71d JM |
3726 | #ifdef CHILD_PREPARE_TO_STORE |
3727 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3728 | #endif |
c906108c SS |
3729 | } |
3730 | ||
3731 | /* | |
c3f6f71d JM |
3732 | * store_registers |
3733 | * | |
3734 | * Since the /proc interface will not read individual registers, | |
3735 | * we will cache these requests until the process is resumed, and | |
3736 | * only then write them back to the inferior process. | |
3737 | * | |
3738 | * FIXME: is that a really bad idea? Have to think about cases | |
3739 | * where writing one register might affect the value of others, etc. | |
3740 | */ | |
c906108c | 3741 | |
c3f6f71d | 3742 | static void |
fba45db2 | 3743 | procfs_store_registers (int regno) |
c3f6f71d JM |
3744 | { |
3745 | gdb_fpregset_t *fpregs; | |
3746 | gdb_gregset_t *gregs; | |
3747 | procinfo *pi; | |
3748 | int pid; | |
3749 | int tid; | |
c906108c | 3750 | |
39f77062 KB |
3751 | pid = PIDGET (inferior_ptid); |
3752 | tid = TIDGET (inferior_ptid); | |
c906108c | 3753 | |
c3f6f71d JM |
3754 | /* First find procinfo for main process */ |
3755 | pi = find_procinfo_or_die (pid, 0); | |
3756 | ||
3757 | /* If current lwp for process is not the same as requested thread | |
39f77062 | 3758 | (ie. inferior_ptid), then find procinfo for the requested thread. */ |
c3f6f71d JM |
3759 | |
3760 | if ((tid != 0) && | |
3761 | (tid != proc_get_current_thread (pi))) | |
3762 | pi = find_procinfo_or_die (pid, tid); | |
3763 | ||
3764 | if (pi == NULL) | |
3765 | error ("procfs: store_registers: failed to find procinfo for %s", | |
39f77062 | 3766 | target_pid_to_str (inferior_ptid)); |
c906108c | 3767 | |
c3f6f71d JM |
3768 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3769 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3770 | |
c3f6f71d JM |
3771 | fill_gregset (gregs, regno); |
3772 | if (!proc_set_gregs (pi)) | |
3773 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3774 | |
60054393 MS |
3775 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3776 | { | |
3777 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3778 | regno == PC_REGNUM || | |
3779 | (NPC_REGNUM >= 0 && regno == NPC_REGNUM) || | |
3780 | regno == FP_REGNUM || | |
3781 | regno == SP_REGNUM) | |
3782 | return; /* not a floating point register */ | |
3783 | ||
3784 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3785 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3786 | ||
3787 | fill_fpregset (fpregs, regno); | |
3788 | if (!proc_set_fpregs (pi)) | |
3789 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3790 | } | |
c3f6f71d | 3791 | } |
c906108c | 3792 | |
37de36c6 KB |
3793 | static int |
3794 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3795 | { | |
3796 | ||
3797 | #ifdef SYS_lwp_exit | |
3798 | if (scall == SYS_lwp_exit) | |
3799 | return 1; | |
3800 | #endif | |
3801 | #ifdef SYS_lwpexit | |
3802 | if (scall == SYS_lwpexit) | |
3803 | return 1; | |
3804 | #endif | |
3805 | return 0; | |
3806 | } | |
3807 | ||
3808 | static int | |
3809 | syscall_is_exit (procinfo *pi, int scall) | |
3810 | { | |
3811 | #ifdef SYS_exit | |
3812 | if (scall == SYS_exit) | |
3813 | return 1; | |
3814 | #endif | |
3815 | #ifdef DYNAMIC_SYSCALLS | |
3816 | if (find_syscall (pi, "_exit") == scall) | |
3817 | return 1; | |
3818 | #endif | |
3819 | return 0; | |
3820 | } | |
3821 | ||
3822 | static int | |
3823 | syscall_is_exec (procinfo *pi, int scall) | |
3824 | { | |
3825 | #ifdef SYS_exec | |
3826 | if (scall == SYS_exec) | |
3827 | return 1; | |
3828 | #endif | |
3829 | #ifdef SYS_execv | |
3830 | if (scall == SYS_execv) | |
3831 | return 1; | |
3832 | #endif | |
3833 | #ifdef SYS_execve | |
3834 | if (scall == SYS_execve) | |
3835 | return 1; | |
3836 | #endif | |
3837 | #ifdef DYNAMIC_SYSCALLS | |
3838 | if (find_syscall (pi, "_execve")) | |
3839 | return 1; | |
3840 | if (find_syscall (pi, "ra_execve")) | |
3841 | return 1; | |
3842 | #endif | |
3843 | return 0; | |
3844 | } | |
3845 | ||
3846 | static int | |
3847 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3848 | { | |
3849 | #ifdef SYS_lwp_create | |
3850 | if (scall == SYS_lwp_create) | |
3851 | return 1; | |
3852 | #endif | |
3853 | #ifdef SYS_lwpcreate | |
3854 | if (scall == SYS_lwpcreate) | |
3855 | return 1; | |
3856 | #endif | |
3857 | return 0; | |
3858 | } | |
3859 | ||
c3f6f71d JM |
3860 | /* |
3861 | * Function: target_wait | |
3862 | * | |
3863 | * Retrieve the next stop event from the child process. | |
3864 | * If child has not stopped yet, wait for it to stop. | |
3865 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3866 | * into gdb internal event codes. | |
3867 | * | |
3868 | * Return: id of process (and possibly thread) that incurred the event. | |
3869 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3870 | */ |
3871 | ||
39f77062 KB |
3872 | static ptid_t |
3873 | procfs_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c | 3874 | { |
c3f6f71d JM |
3875 | /* First cut: loosely based on original version 2.1 */ |
3876 | procinfo *pi; | |
39f77062 KB |
3877 | int wstat; |
3878 | int temp_tid; | |
3879 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3880 | int why, what, flags; |
3881 | int retry = 0; | |
c906108c | 3882 | |
c3f6f71d | 3883 | wait_again: |
c906108c | 3884 | |
c3f6f71d JM |
3885 | retry++; |
3886 | wstat = 0; | |
39f77062 | 3887 | retval = pid_to_ptid (-1); |
c906108c | 3888 | |
c3f6f71d | 3889 | /* Find procinfo for main process */ |
39f77062 | 3890 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3891 | if (pi) |
c906108c | 3892 | { |
c3f6f71d JM |
3893 | /* We must assume that the status is stale now... */ |
3894 | pi->status_valid = 0; | |
3895 | pi->gregs_valid = 0; | |
3896 | pi->fpregs_valid = 0; | |
3897 | ||
3898 | #if 0 /* just try this out... */ | |
3899 | flags = proc_flags (pi); | |
3900 | why = proc_why (pi); | |
3901 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3902 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3903 | #endif | |
3904 | /* If child is not stopped, wait for it to stop. */ | |
3905 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3906 | !proc_wait_for_stop (pi)) | |
c906108c | 3907 | { |
c3f6f71d JM |
3908 | /* wait_for_stop failed: has the child terminated? */ |
3909 | if (errno == ENOENT) | |
c906108c | 3910 | { |
39f77062 KB |
3911 | int wait_retval; |
3912 | ||
c3f6f71d | 3913 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 3914 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 3915 | |
39f77062 | 3916 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
c3f6f71d | 3917 | error ("procfs: couldn't stop process %d: wait returned %d\n", |
39f77062 | 3918 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
3919 | /* FIXME: might I not just use waitpid? |
3920 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 3921 | retval = pid_to_ptid (wait_retval); |
c906108c | 3922 | } |
d1566ff5 FN |
3923 | else if (errno == EINTR) |
3924 | goto wait_again; | |
c3f6f71d | 3925 | else |
c906108c | 3926 | { |
c3f6f71d JM |
3927 | /* Unknown error from wait_for_stop. */ |
3928 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3929 | } |
c3f6f71d JM |
3930 | } |
3931 | else | |
3932 | { | |
3933 | /* This long block is reached if either: | |
3934 | a) the child was already stopped, or | |
3935 | b) we successfully waited for the child with wait_for_stop. | |
3936 | This block will analyze the /proc status, and translate it | |
3937 | into a waitstatus for GDB. | |
3938 | ||
3939 | If we actually had to call wait because the /proc file | |
3940 | is gone (child terminated), then we skip this block, | |
3941 | because we already have a waitstatus. */ | |
3942 | ||
3943 | flags = proc_flags (pi); | |
3944 | why = proc_why (pi); | |
3945 | what = proc_what (pi); | |
3946 | ||
c3f6f71d | 3947 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3948 | { |
c3f6f71d JM |
3949 | #ifdef PR_ASYNC |
3950 | /* If it's running async (for single_thread control), | |
3951 | set it back to normal again. */ | |
3952 | if (flags & PR_ASYNC) | |
3953 | if (!proc_unset_async (pi)) | |
3954 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3955 | #endif | |
3956 | ||
3957 | if (info_verbose) | |
3958 | proc_prettyprint_why (why, what, 1); | |
3959 | ||
3960 | /* The 'pid' we will return to GDB is composed of | |
3961 | the process ID plus the lwp ID. */ | |
3962 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3963 | ||
3964 | switch (why) { | |
3965 | case PR_SIGNALLED: | |
3966 | wstat = (what << 8) | 0177; | |
3967 | break; | |
3968 | case PR_SYSENTRY: | |
37de36c6 | 3969 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3970 | { |
37de36c6 KB |
3971 | printf_filtered ("[%s exited]\n", |
3972 | target_pid_to_str (retval)); | |
3973 | delete_thread (retval); | |
3974 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3975 | return retval; | |
3976 | } | |
3977 | else if (syscall_is_exit (pi, what)) | |
3978 | { | |
3979 | /* Handle SYS_exit call only */ | |
3980 | /* Stopped at entry to SYS_exit. | |
3981 | Make it runnable, resume it, then use | |
3982 | the wait system call to get its exit code. | |
3983 | Proc_run_process always clears the current | |
3984 | fault and signal. | |
3985 | Then return its exit status. */ | |
3986 | pi->status_valid = 0; | |
3987 | wstat = 0; | |
3988 | /* FIXME: what we should do is return | |
3989 | TARGET_WAITKIND_SPURIOUS. */ | |
3990 | if (!proc_run_process (pi, 0, 0)) | |
3991 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3992 | if (attach_flag) | |
c3f6f71d | 3993 | { |
37de36c6 KB |
3994 | /* Don't call wait: simulate waiting for exit, |
3995 | return a "success" exit code. Bogus: what if | |
3996 | it returns something else? */ | |
3997 | wstat = 0; | |
39f77062 | 3998 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3999 | } |
4000 | else | |
4001 | { | |
4002 | int temp = wait (&wstat); | |
4003 | ||
4004 | /* FIXME: shouldn't I make sure I get the right | |
4005 | event from the right process? If (for | |
4006 | instance) I have killed an earlier inferior | |
4007 | process but failed to clean up after it | |
4008 | somehow, I could get its termination event | |
4009 | here. */ | |
4010 | ||
4011 | /* If wait returns -1, that's what we return to GDB. */ | |
4012 | if (temp < 0) | |
39f77062 | 4013 | retval = pid_to_ptid (temp); |
c3f6f71d | 4014 | } |
c3f6f71d | 4015 | } |
37de36c6 KB |
4016 | else |
4017 | { | |
4018 | printf_filtered ("procfs: trapped on entry to "); | |
4019 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4020 | printf_filtered ("\n"); | |
4021 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4022 | { |
37de36c6 | 4023 | long i, nsysargs, *sysargs; |
c3f6f71d | 4024 | |
37de36c6 KB |
4025 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4026 | (sysargs = proc_sysargs (pi)) != NULL) | |
4027 | { | |
4028 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4029 | for (i = 0; i < nsysargs; i++) | |
4030 | printf_filtered ("#%ld: 0x%08lx\n", | |
4031 | i, sysargs[i]); | |
4032 | } | |
c3f6f71d | 4033 | |
c3f6f71d | 4034 | } |
c3f6f71d | 4035 | #endif |
37de36c6 KB |
4036 | if (status) |
4037 | { | |
4038 | /* How to exit gracefully, returning "unknown event" */ | |
4039 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4040 | return inferior_ptid; |
37de36c6 KB |
4041 | } |
4042 | else | |
4043 | { | |
4044 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4045 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4046 | goto wait_again; |
4047 | } | |
4048 | } | |
4049 | break; | |
4050 | case PR_SYSEXIT: | |
4051 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4052 | { |
37de36c6 KB |
4053 | /* Hopefully this is our own "fork-child" execing |
4054 | the real child. Hoax this event into a trap, and | |
4055 | GDB will see the child about to execute its start | |
4056 | address. */ | |
4057 | wstat = (SIGTRAP << 8) | 0177; | |
4058 | } | |
4059 | else if (syscall_is_lwp_create (pi, what)) | |
4060 | { | |
4061 | /* | |
4062 | * This syscall is somewhat like fork/exec. | |
4063 | * We will get the event twice: once for the parent LWP, | |
4064 | * and once for the child. We should already know about | |
4065 | * the parent LWP, but the child will be new to us. So, | |
4066 | * whenever we get this event, if it represents a new | |
4067 | * thread, simply add the thread to the list. | |
4068 | */ | |
c3f6f71d | 4069 | |
37de36c6 | 4070 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4071 | temp_tid = proc_get_current_thread (pi); |
4072 | if (!find_procinfo (pi->pid, temp_tid)) | |
4073 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4074 | |
39f77062 | 4075 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4076 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4077 | if (!in_thread_list (temp_ptid)) |
c3f6f71d | 4078 | { |
39f77062 KB |
4079 | printf_filtered ("[New %s]\n", |
4080 | target_pid_to_str (temp_ptid)); | |
4081 | add_thread (temp_ptid); | |
c3f6f71d | 4082 | } |
37de36c6 KB |
4083 | /* Return to WFI, but tell it to immediately resume. */ |
4084 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4085 | return inferior_ptid; |
37de36c6 KB |
4086 | } |
4087 | else if (syscall_is_lwp_exit (pi, what)) | |
4088 | { | |
4089 | printf_filtered ("[%s exited]\n", | |
4090 | target_pid_to_str (retval)); | |
4091 | delete_thread (retval); | |
4092 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4093 | return retval; | |
c3f6f71d | 4094 | } |
37de36c6 KB |
4095 | else if (0) |
4096 | { | |
4097 | /* FIXME: Do we need to handle SYS_sproc, | |
4098 | SYS_fork, or SYS_vfork here? The old procfs | |
4099 | seemed to use this event to handle threads on | |
4100 | older (non-LWP) systems, where I'm assuming | |
4101 | that threads were actually separate processes. | |
4102 | Irix, maybe? Anyway, low priority for now. */ | |
4103 | } | |
4104 | else | |
4105 | { | |
4106 | printf_filtered ("procfs: trapped on exit from "); | |
4107 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4108 | printf_filtered ("\n"); | |
4109 | #ifndef PIOCSSPCACT | |
4110 | { | |
4111 | long i, nsysargs, *sysargs; | |
4112 | ||
4113 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4114 | (sysargs = proc_sysargs (pi)) != NULL) | |
4115 | { | |
4116 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4117 | for (i = 0; i < nsysargs; i++) | |
4118 | printf_filtered ("#%ld: 0x%08lx\n", | |
4119 | i, sysargs[i]); | |
4120 | } | |
4121 | } | |
c3f6f71d | 4122 | #endif |
37de36c6 | 4123 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4124 | return inferior_ptid; |
37de36c6 | 4125 | } |
c3f6f71d JM |
4126 | break; |
4127 | case PR_REQUESTED: | |
4128 | #if 0 /* FIXME */ | |
4129 | wstat = (SIGSTOP << 8) | 0177; | |
4130 | break; | |
4131 | #else | |
4132 | if (retry < 5) | |
4133 | { | |
4134 | printf_filtered ("Retry #%d:\n", retry); | |
4135 | pi->status_valid = 0; | |
4136 | goto wait_again; | |
4137 | } | |
4138 | else | |
4139 | { | |
4140 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4141 | temp_tid = proc_get_current_thread (pi); |
4142 | if (!find_procinfo (pi->pid, temp_tid)) | |
4143 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4144 | |
4145 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4146 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4147 | if (!in_thread_list (temp_ptid)) | |
c3f6f71d | 4148 | { |
0d06e24b | 4149 | printf_filtered ("[New %s]\n", |
39f77062 KB |
4150 | target_pid_to_str (temp_ptid)); |
4151 | add_thread (temp_ptid); | |
c3f6f71d JM |
4152 | } |
4153 | ||
4154 | status->kind = TARGET_WAITKIND_STOPPED; | |
4155 | status->value.sig = 0; | |
4156 | return retval; | |
4157 | } | |
4158 | #endif | |
4159 | case PR_JOBCONTROL: | |
4160 | wstat = (what << 8) | 0177; | |
4161 | break; | |
4162 | case PR_FAULTED: | |
4163 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
4164 | #ifdef FLTWATCH | |
4165 | case FLTWATCH: | |
4166 | wstat = (SIGTRAP << 8) | 0177; | |
4167 | break; | |
4168 | #endif | |
4169 | #ifdef FLTKWATCH | |
4170 | case FLTKWATCH: | |
4171 | wstat = (SIGTRAP << 8) | 0177; | |
4172 | break; | |
4173 | #endif | |
4174 | /* FIXME: use si_signo where possible. */ | |
4175 | case FLTPRIV: | |
4176 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4177 | case FLTILL: | |
4178 | #endif | |
4179 | wstat = (SIGILL << 8) | 0177; | |
4180 | break; | |
4181 | case FLTBPT: | |
4182 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4183 | case FLTTRACE: | |
4184 | #endif | |
4185 | wstat = (SIGTRAP << 8) | 0177; | |
4186 | break; | |
4187 | case FLTSTACK: | |
4188 | case FLTACCESS: | |
4189 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4190 | case FLTBOUNDS: | |
4191 | #endif | |
4192 | wstat = (SIGSEGV << 8) | 0177; | |
4193 | break; | |
4194 | case FLTIOVF: | |
4195 | case FLTIZDIV: | |
4196 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4197 | case FLTFPE: | |
4198 | #endif | |
4199 | wstat = (SIGFPE << 8) | 0177; | |
4200 | break; | |
4201 | case FLTPAGE: /* Recoverable page fault */ | |
4202 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4203 | retval = pid_to_ptid (-1); |
c3f6f71d JM |
4204 | printf_filtered ("procfs:%d -- ", __LINE__); |
4205 | printf_filtered ("child stopped for unknown reason:\n"); | |
4206 | proc_prettyprint_why (why, what, 1); | |
4207 | error ("... giving up..."); | |
4208 | break; | |
4209 | } | |
4210 | break; /* case PR_FAULTED: */ | |
4211 | default: /* switch (why) unmatched */ | |
4212 | printf_filtered ("procfs:%d -- ", __LINE__); | |
4213 | printf_filtered ("child stopped for unknown reason:\n"); | |
4214 | proc_prettyprint_why (why, what, 1); | |
4215 | error ("... giving up..."); | |
4216 | break; | |
4217 | } | |
4218 | /* | |
4219 | * Got this far without error: | |
4220 | * If retval isn't in the threads database, add it. | |
4221 | */ | |
39f77062 KB |
4222 | if (PIDGET (retval) > 0 && |
4223 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4224 | !in_thread_list (retval)) |
c906108c | 4225 | { |
c3f6f71d JM |
4226 | /* |
4227 | * We have a new thread. | |
4228 | * We need to add it both to GDB's list and to our own. | |
4229 | * If we don't create a procinfo, resume may be unhappy | |
4230 | * later. | |
4231 | */ | |
4232 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
4233 | add_thread (retval); | |
4234 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4235 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
4236 | ||
4237 | /* In addition, it's possible that this is the first | |
4238 | * new thread we've seen, in which case we may not | |
39f77062 | 4239 | * have created entries for inferior_ptid yet. |
c3f6f71d | 4240 | */ |
39f77062 | 4241 | if (TIDGET (inferior_ptid) != 0) |
c3f6f71d | 4242 | { |
39f77062 KB |
4243 | if (!in_thread_list (inferior_ptid)) |
4244 | add_thread (inferior_ptid); | |
4245 | if (find_procinfo (PIDGET (inferior_ptid), | |
4246 | TIDGET (inferior_ptid)) == NULL) | |
4247 | create_procinfo (PIDGET (inferior_ptid), | |
4248 | TIDGET (inferior_ptid)); | |
c3f6f71d | 4249 | } |
c906108c | 4250 | } |
c906108c | 4251 | } |
c3f6f71d | 4252 | else /* flags do not indicate STOPPED */ |
c906108c | 4253 | { |
c3f6f71d JM |
4254 | /* surely this can't happen... */ |
4255 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4256 | __LINE__); | |
4257 | proc_prettyprint_flags (flags, 1); | |
4258 | error ("procfs: ...giving up..."); | |
c906108c | 4259 | } |
c906108c | 4260 | } |
c906108c | 4261 | |
c3f6f71d JM |
4262 | if (status) |
4263 | store_waitstatus (status, wstat); | |
c906108c SS |
4264 | } |
4265 | ||
c3f6f71d JM |
4266 | return retval; |
4267 | } | |
c906108c | 4268 | |
d0849a9a KB |
4269 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4270 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4271 | otherwise transfer them from the target. TARGET is unused. | |
4272 | ||
4273 | The return value is 0 if an error occurred or no bytes were | |
4274 | transferred. Otherwise, it will be a positive value which | |
4275 | indicates the number of bytes transferred between gdb and the | |
4276 | target. (Note that the interface also makes provisions for | |
4277 | negative values, but this capability isn't implemented here.) */ | |
4278 | ||
c3f6f71d | 4279 | static int |
d0849a9a | 4280 | procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite, |
37de36c6 | 4281 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4282 | { |
4283 | procinfo *pi; | |
4284 | int nbytes = 0; | |
c906108c | 4285 | |
c3f6f71d | 4286 | /* Find procinfo for main process */ |
39f77062 | 4287 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4288 | if (pi->as_fd == 0 && |
4289 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4290 | { |
c3f6f71d JM |
4291 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4292 | return 0; | |
c906108c | 4293 | } |
c906108c | 4294 | |
c3f6f71d | 4295 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4296 | { |
c3f6f71d | 4297 | if (dowrite) |
c906108c | 4298 | { |
c3f6f71d JM |
4299 | #ifdef NEW_PROC_API |
4300 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4301 | #else |
c3f6f71d | 4302 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4303 | #endif |
c3f6f71d | 4304 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4305 | } |
c3f6f71d | 4306 | else |
c906108c | 4307 | { |
c3f6f71d JM |
4308 | PROCFS_NOTE ("read memory: \n"); |
4309 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4310 | } |
c3f6f71d | 4311 | if (nbytes < 0) |
c906108c | 4312 | { |
c3f6f71d | 4313 | nbytes = 0; |
c906108c | 4314 | } |
c906108c | 4315 | } |
c3f6f71d | 4316 | return nbytes; |
c906108c SS |
4317 | } |
4318 | ||
4319 | /* | |
c3f6f71d JM |
4320 | * Function: invalidate_cache |
4321 | * | |
4322 | * Called by target_resume before making child runnable. | |
4323 | * Mark cached registers and status's invalid. | |
4324 | * If there are "dirty" caches that need to be written back | |
4325 | * to the child process, do that. | |
4326 | * | |
4327 | * File descriptors are also cached. | |
4328 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4329 | * However, as they are expensive to open, we don't want to throw them | |
4330 | * away indescriminately either. As a compromise, we will keep the | |
4331 | * file descriptors for the parent process, but discard any file | |
4332 | * descriptors we may have accumulated for the threads. | |
4333 | * | |
4334 | * Return value: | |
4335 | * As this function is called by iterate_over_threads, it always | |
4336 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
4337 | */ |
4338 | ||
c3f6f71d JM |
4339 | |
4340 | static int | |
fba45db2 | 4341 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4342 | { |
c3f6f71d JM |
4343 | /* |
4344 | * About to run the child; invalidate caches and do any other cleanup. | |
4345 | */ | |
c906108c | 4346 | |
c3f6f71d JM |
4347 | #if 0 |
4348 | if (pi->gregs_dirty) | |
4349 | if (parent == NULL || | |
4350 | proc_get_current_thread (parent) != pi->tid) | |
4351 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4352 | proc_warn (pi, "target_resume, set_gregs", | |
4353 | __LINE__); | |
60054393 MS |
4354 | if (FP0_REGNUM >= 0) |
4355 | if (pi->fpregs_dirty) | |
4356 | if (parent == NULL || | |
4357 | proc_get_current_thread (parent) != pi->tid) | |
4358 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4359 | proc_warn (pi, "target_resume, set_fpregs", | |
4360 | __LINE__); | |
c906108c | 4361 | #endif |
c906108c | 4362 | |
c3f6f71d | 4363 | if (parent != NULL) |
c906108c | 4364 | { |
c3f6f71d JM |
4365 | /* The presence of a parent indicates that this is an LWP. |
4366 | Close any file descriptors that it might have open. | |
4367 | We don't do this to the master (parent) procinfo. */ | |
4368 | ||
4369 | close_procinfo_files (pi); | |
c906108c | 4370 | } |
c3f6f71d JM |
4371 | pi->gregs_valid = 0; |
4372 | pi->fpregs_valid = 0; | |
4373 | #if 0 | |
4374 | pi->gregs_dirty = 0; | |
4375 | pi->fpregs_dirty = 0; | |
c906108c | 4376 | #endif |
c3f6f71d JM |
4377 | pi->status_valid = 0; |
4378 | pi->threads_valid = 0; | |
c906108c | 4379 | |
c3f6f71d | 4380 | return 0; |
c906108c SS |
4381 | } |
4382 | ||
0fda6bd2 | 4383 | #if 0 |
c906108c | 4384 | /* |
c3f6f71d JM |
4385 | * Function: make_signal_thread_runnable |
4386 | * | |
4387 | * A callback function for iterate_over_threads. | |
4388 | * Find the asynchronous signal thread, and make it runnable. | |
4389 | * See if that helps matters any. | |
c906108c SS |
4390 | */ |
4391 | ||
c3f6f71d | 4392 | static int |
fba45db2 | 4393 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4394 | { |
c3f6f71d JM |
4395 | #ifdef PR_ASLWP |
4396 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4397 | { |
c3f6f71d JM |
4398 | if (!proc_run_process (pi, 0, -1)) |
4399 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4400 | return 1; | |
c906108c | 4401 | } |
c906108c | 4402 | #endif |
c3f6f71d | 4403 | return 0; |
c906108c | 4404 | } |
0fda6bd2 | 4405 | #endif |
c906108c SS |
4406 | |
4407 | /* | |
c3f6f71d JM |
4408 | * Function: target_resume |
4409 | * | |
4410 | * Make the child process runnable. Normally we will then call | |
4411 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4412 | * | |
4413 | * Arguments: | |
4414 | * step: if true, then arrange for the child to stop again | |
4415 | * after executing a single instruction. | |
4416 | * signo: if zero, then cancel any pending signal. | |
4417 | * If non-zero, then arrange for the indicated signal | |
4418 | * to be delivered to the child when it runs. | |
4419 | * pid: if -1, then allow any child thread to run. | |
4420 | * if non-zero, then allow only the indicated thread to run. | |
4421 | ******* (not implemented yet) | |
c906108c SS |
4422 | */ |
4423 | ||
4424 | static void | |
39f77062 | 4425 | procfs_resume (ptid_t ptid, int step, enum target_signal signo) |
c906108c | 4426 | { |
c3f6f71d JM |
4427 | procinfo *pi, *thread; |
4428 | int native_signo; | |
4429 | ||
4430 | /* 2.1: | |
4431 | prrun.prflags |= PRSVADDR; | |
4432 | prrun.pr_vaddr = $PC; set resume address | |
4433 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4434 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4435 | prrun.prflags |= PRCFAULT; clear current fault. | |
4436 | ||
4437 | PRSTRACE and PRSFAULT can be done by other means | |
4438 | (proc_trace_signals, proc_trace_faults) | |
4439 | PRSVADDR is unnecessary. | |
4440 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4441 | This basically leaves PRSTEP and PRCSIG. | |
4442 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4443 | So basically PR_STEP is the sole argument that must be passed | |
4444 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4445 | ||
4446 | /* Find procinfo for main process */ | |
39f77062 | 4447 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4448 | |
4449 | /* First cut: ignore pid argument */ | |
4450 | errno = 0; | |
c906108c | 4451 | |
c3f6f71d JM |
4452 | /* Convert signal to host numbering. */ |
4453 | if (signo == 0 || | |
0fda6bd2 | 4454 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4455 | native_signo = 0; |
4456 | else | |
4457 | native_signo = target_signal_to_host (signo); | |
c906108c | 4458 | |
c3f6f71d | 4459 | pi->ignore_next_sigstop = 0; |
c906108c | 4460 | |
c3f6f71d JM |
4461 | /* Running the process voids all cached registers and status. */ |
4462 | /* Void the threads' caches first */ | |
4463 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4464 | /* Void the process procinfo's caches. */ | |
4465 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4466 | |
39f77062 | 4467 | if (PIDGET (ptid) != -1) |
c906108c | 4468 | { |
c3f6f71d | 4469 | /* Resume a specific thread, presumably suppressing the others. */ |
39f77062 | 4470 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4471 | if (thread != NULL) |
c906108c | 4472 | { |
c3f6f71d JM |
4473 | if (thread->tid != 0) |
4474 | { | |
4475 | /* We're to resume a specific thread, and not the others. | |
4476 | * Set the child process's PR_ASYNC flag. | |
4477 | */ | |
4478 | #ifdef PR_ASYNC | |
4479 | if (!proc_set_async (pi)) | |
4480 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4481 | #endif | |
4482 | #if 0 | |
4483 | proc_iterate_over_threads (pi, | |
4484 | make_signal_thread_runnable, | |
4485 | NULL); | |
4486 | #endif | |
4487 | pi = thread; /* substitute the thread's procinfo for run */ | |
4488 | } | |
c906108c SS |
4489 | } |
4490 | } | |
c906108c | 4491 | |
c3f6f71d | 4492 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4493 | { |
c3f6f71d JM |
4494 | if (errno == EBUSY) |
4495 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4496 | else | |
4497 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4498 | } |
c3f6f71d | 4499 | } |
c906108c | 4500 | |
c3f6f71d JM |
4501 | /* |
4502 | * Function: register_gdb_signals | |
4503 | * | |
4504 | * Traverse the list of signals that GDB knows about | |
4505 | * (see "handle" command), and arrange for the target | |
4506 | * to be stopped or not, according to these settings. | |
4507 | * | |
4508 | * Returns non-zero for success, zero for failure. | |
4509 | */ | |
c906108c | 4510 | |
c3f6f71d | 4511 | static int |
37de36c6 | 4512 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4513 | { |
4514 | int signo; | |
c906108c | 4515 | |
c3f6f71d JM |
4516 | for (signo = 0; signo < NSIG; signo ++) |
4517 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4518 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4519 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4520 | prdelset (signals, signo); | |
4521 | else | |
4522 | praddset (signals, signo); | |
c906108c | 4523 | |
c3f6f71d | 4524 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4525 | } |
4526 | ||
4527 | /* | |
c3f6f71d JM |
4528 | * Function: target_notice_signals |
4529 | * | |
4530 | * Set up to trace signals in the child process. | |
4531 | */ | |
c906108c | 4532 | |
c3f6f71d | 4533 | static void |
39f77062 | 4534 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4535 | { |
37de36c6 | 4536 | gdb_sigset_t signals; |
39f77062 | 4537 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4538 | |
c3f6f71d JM |
4539 | if (proc_get_traced_signals (pi, &signals) && |
4540 | register_gdb_signals (pi, &signals)) | |
4541 | return; | |
4542 | else | |
4543 | proc_error (pi, "notice_signals", __LINE__); | |
4544 | } | |
c906108c | 4545 | |
c3f6f71d JM |
4546 | /* |
4547 | * Function: target_files_info | |
4548 | * | |
4549 | * Print status information about the child process. | |
4550 | */ | |
c906108c | 4551 | |
c3f6f71d | 4552 | static void |
fba45db2 | 4553 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d JM |
4554 | { |
4555 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4556 | attach_flag? "attached": "child", | |
39f77062 | 4557 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4558 | } |
c906108c | 4559 | |
c3f6f71d JM |
4560 | /* |
4561 | * Function: target_open | |
4562 | * | |
4563 | * A dummy: you don't open procfs. | |
c906108c SS |
4564 | */ |
4565 | ||
4566 | static void | |
fba45db2 | 4567 | procfs_open (char *args, int from_tty) |
c906108c | 4568 | { |
c3f6f71d JM |
4569 | error ("Use the \"run\" command to start a Unix child process."); |
4570 | } | |
c906108c | 4571 | |
c3f6f71d JM |
4572 | /* |
4573 | * Function: target_can_run | |
4574 | * | |
4575 | * This tells GDB that this target vector can be invoked | |
4576 | * for "run" or "attach". | |
4577 | */ | |
c906108c | 4578 | |
c3f6f71d JM |
4579 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4580 | be a runnable target. Used by targets | |
4581 | that can sit atop procfs, such as solaris | |
4582 | thread support. */ | |
c906108c | 4583 | |
c906108c | 4584 | |
c3f6f71d | 4585 | static int |
fba45db2 | 4586 | procfs_can_run (void) |
c3f6f71d JM |
4587 | { |
4588 | /* This variable is controlled by modules that sit atop procfs that | |
4589 | may layer their own process structure atop that provided here. | |
4590 | sol-thread.c does this because of the Solaris two-level thread | |
4591 | model. */ | |
4592 | ||
4593 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4594 | |
c3f6f71d JM |
4595 | return !procfs_suppress_run; |
4596 | } | |
c906108c | 4597 | |
c3f6f71d JM |
4598 | /* |
4599 | * Function: target_stop | |
4600 | * | |
4601 | * Stop the child process asynchronously, as when the | |
4602 | * gdb user types control-c or presses a "stop" button. | |
4603 | * | |
4604 | * Works by sending kill(SIGINT) to the child's process group. | |
4605 | */ | |
c906108c | 4606 | |
c3f6f71d | 4607 | static void |
fba45db2 | 4608 | procfs_stop (void) |
c3f6f71d | 4609 | { |
c3f6f71d | 4610 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4611 | } |
4612 | ||
c906108c | 4613 | /* |
c3f6f71d JM |
4614 | * Function: unconditionally_kill_inferior |
4615 | * | |
4616 | * Make it die. Wait for it to die. Clean up after it. | |
4617 | * Note: this should only be applied to the real process, | |
4618 | * not to an LWP, because of the check for parent-process. | |
4619 | * If we need this to work for an LWP, it needs some more logic. | |
4620 | */ | |
c906108c | 4621 | |
c3f6f71d | 4622 | static void |
fba45db2 | 4623 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4624 | { |
4625 | int parent_pid; | |
c906108c | 4626 | |
c3f6f71d JM |
4627 | parent_pid = proc_parent_pid (pi); |
4628 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4629 | /* FIXME: use access functions */ | |
4630 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4631 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4632 | file for the inferior. */ | |
4633 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4634 | { | |
4635 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4636 | } | |
4637 | #endif | |
4638 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4639 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4640 | to kill the inferior, otherwise it might remain stopped with a | |
4641 | pending SIGKILL. | |
4642 | We do not check the result of the PIOCSSIG, the inferior might have | |
4643 | died already. */ | |
4644 | { | |
37de36c6 | 4645 | gdb_siginfo_t newsiginfo; |
c906108c | 4646 | |
c3f6f71d JM |
4647 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4648 | newsiginfo.si_signo = SIGKILL; | |
4649 | newsiginfo.si_code = 0; | |
4650 | newsiginfo.si_errno = 0; | |
4651 | newsiginfo.si_pid = getpid (); | |
4652 | newsiginfo.si_uid = getuid (); | |
4653 | /* FIXME: use proc_set_current_signal */ | |
4654 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4655 | } | |
4656 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4657 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4658 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4659 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4660 | destroy_procinfo (pi); | |
c906108c | 4661 | |
c3f6f71d JM |
4662 | /* If pi is GDB's child, wait for it to die. */ |
4663 | if (parent_pid == getpid ()) | |
4664 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4665 | Should we check the returned event? */ | |
4666 | { | |
0d06e24b | 4667 | #if 0 |
c3f6f71d | 4668 | int status, ret; |
c906108c | 4669 | |
c3f6f71d JM |
4670 | ret = waitpid (pi->pid, &status, 0); |
4671 | #else | |
4672 | wait (NULL); | |
4673 | #endif | |
4674 | } | |
4675 | } | |
c906108c | 4676 | |
c3f6f71d JM |
4677 | /* |
4678 | * Function: target_kill_inferior | |
4679 | * | |
4680 | * We're done debugging it, and we want it to go away. | |
4681 | * Then we want GDB to forget all about it. | |
c906108c SS |
4682 | */ |
4683 | ||
c3f6f71d | 4684 | static void |
fba45db2 | 4685 | procfs_kill_inferior (void) |
c906108c | 4686 | { |
39f77062 | 4687 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4688 | { |
4689 | /* Find procinfo for main process */ | |
39f77062 | 4690 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4691 | |
c3f6f71d JM |
4692 | if (pi) |
4693 | unconditionally_kill_inferior (pi); | |
4694 | target_mourn_inferior (); | |
c906108c | 4695 | } |
c3f6f71d JM |
4696 | } |
4697 | ||
4698 | /* | |
4699 | * Function: target_mourn_inferior | |
4700 | * | |
4701 | * Forget we ever debugged this thing! | |
4702 | */ | |
c906108c | 4703 | |
c3f6f71d | 4704 | static void |
fba45db2 | 4705 | procfs_mourn_inferior (void) |
c3f6f71d JM |
4706 | { |
4707 | procinfo *pi; | |
c906108c | 4708 | |
39f77062 | 4709 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4710 | { |
4711 | /* Find procinfo for main process */ | |
39f77062 | 4712 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4713 | if (pi) |
4714 | destroy_procinfo (pi); | |
c906108c | 4715 | } |
c3f6f71d JM |
4716 | unpush_target (&procfs_ops); |
4717 | generic_mourn_inferior (); | |
4718 | } | |
c906108c | 4719 | |
c3f6f71d JM |
4720 | /* |
4721 | * Function: init_inferior | |
4722 | * | |
4723 | * When GDB forks to create a runnable inferior process, | |
4724 | * this function is called on the parent side of the fork. | |
4725 | * It's job is to do whatever is necessary to make the child | |
4726 | * ready to be debugged, and then wait for the child to synchronize. | |
4727 | */ | |
c906108c | 4728 | |
c3f6f71d | 4729 | static void |
fba45db2 | 4730 | procfs_init_inferior (int pid) |
c3f6f71d JM |
4731 | { |
4732 | procinfo *pi; | |
37de36c6 | 4733 | gdb_sigset_t signals; |
c3f6f71d | 4734 | int fail; |
c906108c | 4735 | |
c3f6f71d JM |
4736 | /* This routine called on the parent side (GDB side) |
4737 | after GDB forks the inferior. */ | |
c906108c | 4738 | |
c3f6f71d | 4739 | push_target (&procfs_ops); |
c906108c | 4740 | |
c3f6f71d JM |
4741 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4742 | perror ("procfs: out of memory in 'init_inferior'"); | |
4743 | ||
4744 | if (!open_procinfo_files (pi, FD_CTL)) | |
4745 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4746 | ||
4747 | /* | |
4748 | xmalloc // done | |
4749 | open_procinfo_files // done | |
4750 | link list // done | |
4751 | prfillset (trace) | |
4752 | procfs_notice_signals | |
4753 | prfillset (fault) | |
4754 | prdelset (FLTPAGE) | |
4755 | PIOCWSTOP | |
4756 | PIOCSFAULT | |
4757 | */ | |
4758 | ||
4759 | /* If not stopped yet, wait for it to stop. */ | |
4760 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4761 | !(proc_wait_for_stop (pi))) | |
4762 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4763 | ||
4764 | /* Save some of the /proc state to be restored if we detach. */ | |
4765 | /* FIXME: Why? In case another debugger was debugging it? | |
4766 | We're it's parent, for Ghu's sake! */ | |
4767 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4768 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4769 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4770 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4771 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4772 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4773 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4774 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4775 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4776 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4777 | ||
4778 | /* Register to trace selected signals in the child. */ | |
4779 | prfillset (&signals); | |
4780 | if (!register_gdb_signals (pi, &signals)) | |
4781 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4782 | ||
4783 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4784 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4785 | ||
0d06e24b JM |
4786 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4787 | and possibly even turning ON kill-on-last-close at this point. But | |
4788 | I can't make that change without careful testing which I don't have | |
4789 | time to do right now... */ | |
c3f6f71d JM |
4790 | /* Turn on run-on-last-close flag so that the child |
4791 | will die if GDB goes away for some reason. */ | |
4792 | if (!proc_set_run_on_last_close (pi)) | |
4793 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4794 | ||
4795 | /* The 'process ID' we return to GDB is composed of | |
4796 | the actual process ID plus the lwp ID. */ | |
39f77062 | 4797 | inferior_ptid = MERGEPID (pi->pid, proc_get_current_thread (pi)); |
c906108c | 4798 | |
c3f6f71d JM |
4799 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4800 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4801 | #else | |
4802 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4803 | startup_inferior (2); | |
0d06e24b | 4804 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4805 | } |
c906108c | 4806 | |
c3f6f71d JM |
4807 | /* |
4808 | * Function: set_exec_trap | |
4809 | * | |
4810 | * When GDB forks to create a new process, this function is called | |
4811 | * on the child side of the fork before GDB exec's the user program. | |
4812 | * Its job is to make the child minimally debuggable, so that the | |
4813 | * parent GDB process can connect to the child and take over. | |
4814 | * This function should do only the minimum to make that possible, | |
4815 | * and to synchronize with the parent process. The parent process | |
4816 | * should take care of the details. | |
4817 | */ | |
4818 | ||
4819 | static void | |
fba45db2 | 4820 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4821 | { |
4822 | /* This routine called on the child side (inferior side) | |
4823 | after GDB forks the inferior. It must use only local variables, | |
4824 | because it may be sharing data space with its parent. */ | |
c906108c | 4825 | |
c3f6f71d | 4826 | procinfo *pi; |
37de36c6 | 4827 | sysset_t *exitset; |
c906108c | 4828 | |
c3f6f71d JM |
4829 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4830 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4831 | |
c3f6f71d JM |
4832 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4833 | { | |
4834 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4835 | gdb_flush (gdb_stderr); | |
4836 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4837 | _exit (127); | |
4838 | } | |
c906108c | 4839 | |
c3f6f71d JM |
4840 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4841 | /* OSF method for tracing exec syscalls. Quoting: | |
4842 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4843 | exits from exec system calls because of the user level loader. */ | |
4844 | /* FIXME: make nice and maybe move into an access function. */ | |
4845 | { | |
4846 | int prfs_flags; | |
c906108c | 4847 | |
c3f6f71d JM |
4848 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4849 | { | |
4850 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4851 | gdb_flush (gdb_stderr); | |
4852 | _exit (127); | |
4853 | } | |
4854 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4855 | |
c3f6f71d JM |
4856 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4857 | { | |
4858 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4859 | gdb_flush (gdb_stderr); | |
4860 | _exit (127); | |
4861 | } | |
4862 | } | |
4863 | #else /* not PRFS_STOPEXEC */ | |
4864 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4865 | /* GW: Rationale... | |
4866 | Not all systems with /proc have all the exec* syscalls with the same | |
4867 | names. On the SGI, for example, there is no SYS_exec, but there | |
4868 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4869 | |
37de36c6 KB |
4870 | exitset = sysset_t_alloc (pi); |
4871 | gdb_premptysysset (exitset); | |
c3f6f71d | 4872 | #ifdef SYS_exec |
37de36c6 | 4873 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4874 | #endif |
4875 | #ifdef SYS_execve | |
37de36c6 | 4876 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4877 | #endif |
4878 | #ifdef SYS_execv | |
37de36c6 | 4879 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4880 | #endif |
37de36c6 KB |
4881 | #ifdef DYNAMIC_SYSCALLS |
4882 | { | |
4883 | int callnum = find_syscall (pi, "execve"); | |
4884 | ||
4885 | if (callnum >= 0) | |
4886 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4887 | |
37de36c6 KB |
4888 | callnum = find_syscall (pi, "ra_execve"); |
4889 | if (callnum >= 0) | |
4890 | gdb_praddsysset (exitset, callnum); | |
4891 | } | |
4892 | #endif /* DYNAMIC_SYSCALLS */ | |
4893 | ||
4894 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4895 | { |
c3f6f71d JM |
4896 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4897 | gdb_flush (gdb_stderr); | |
4898 | _exit (127); | |
c906108c | 4899 | } |
c3f6f71d JM |
4900 | #endif /* PRFS_STOPEXEC */ |
4901 | ||
4902 | /* FIXME: should this be done in the parent instead? */ | |
4903 | /* Turn off inherit on fork flag so that all grand-children | |
4904 | of gdb start with tracing flags cleared. */ | |
4905 | if (!proc_unset_inherit_on_fork (pi)) | |
4906 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4907 | ||
4908 | /* Turn off run on last close flag, so that the child process | |
4909 | cannot run away just because we close our handle on it. | |
4910 | We want it to wait for the parent to attach. */ | |
4911 | if (!proc_unset_run_on_last_close (pi)) | |
4912 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4913 | ||
4914 | /* FIXME: No need to destroy the procinfo -- | |
4915 | we have our own address space, and we're about to do an exec! */ | |
4916 | /*destroy_procinfo (pi);*/ | |
c906108c | 4917 | } |
c906108c | 4918 | |
c3f6f71d JM |
4919 | /* |
4920 | * Function: create_inferior | |
4921 | * | |
4922 | * This function is called BEFORE gdb forks the inferior process. | |
4923 | * Its only real responsibility is to set things up for the fork, | |
4924 | * and tell GDB which two functions to call after the fork (one | |
4925 | * for the parent, and one for the child). | |
4926 | * | |
4927 | * This function does a complicated search for a unix shell program, | |
4928 | * which it then uses to parse arguments and environment variables | |
4929 | * to be sent to the child. I wonder whether this code could not | |
4930 | * be abstracted out and shared with other unix targets such as | |
4931 | * infptrace? | |
4932 | */ | |
c906108c SS |
4933 | |
4934 | static void | |
fba45db2 | 4935 | procfs_create_inferior (char *exec_file, char *allargs, char **env) |
c906108c SS |
4936 | { |
4937 | char *shell_file = getenv ("SHELL"); | |
4938 | char *tryname; | |
4939 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4940 | { | |
4941 | ||
4942 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4943 | just do this the normal way (via execlp, which operates by |
4944 | attempting an exec for each element of the PATH until it | |
4945 | finds one which succeeds), then there will be an exec for | |
4946 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4947 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4948 | for these failed execs with the ones for successful execs | |
4949 | (whether the exec has succeeded is stored at that time in the | |
4950 | carry bit or some such architecture-specific and | |
4951 | non-ABI-specified place). | |
4952 | ||
4953 | So I can't think of anything better than to search the PATH | |
4954 | now. This has several disadvantages: (1) There is a race | |
4955 | condition; if we find a file now and it is deleted before we | |
4956 | exec it, we lose, even if the deletion leaves a valid file | |
4957 | further down in the PATH, (2) there is no way to know exactly | |
4958 | what an executable (in the sense of "capable of being | |
4959 | exec'd") file is. Using access() loses because it may lose | |
4960 | if the caller is the superuser; failing to use it loses if | |
4961 | there are ACLs or some such. */ | |
c906108c SS |
4962 | |
4963 | char *p; | |
4964 | char *p1; | |
4965 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4966 | path is used from within GDB. */ |
c906108c SS |
4967 | char *path = getenv ("PATH"); |
4968 | int len; | |
4969 | struct stat statbuf; | |
4970 | ||
4971 | if (path == NULL) | |
4972 | path = "/bin:/usr/bin"; | |
4973 | ||
4974 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4975 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4976 | { |
4977 | p1 = strchr (p, ':'); | |
4978 | if (p1 != NULL) | |
4979 | len = p1 - p; | |
4980 | else | |
4981 | len = strlen (p); | |
4982 | strncpy (tryname, p, len); | |
4983 | tryname[len] = '\0'; | |
4984 | strcat (tryname, "/"); | |
4985 | strcat (tryname, shell_file); | |
4986 | if (access (tryname, X_OK) < 0) | |
4987 | continue; | |
4988 | if (stat (tryname, &statbuf) < 0) | |
4989 | continue; | |
4990 | if (!S_ISREG (statbuf.st_mode)) | |
4991 | /* We certainly need to reject directories. I'm not quite | |
4992 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4993 | that people want to exec() these things. */ | |
4994 | continue; | |
4995 | break; | |
4996 | } | |
4997 | if (p == NULL) | |
4998 | /* Not found. This must be an error rather than merely passing | |
4999 | the file to execlp(), because execlp() would try all the | |
5000 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
5001 | error ("procfs:%d -- Can't find shell %s in PATH", |
5002 | __LINE__, shell_file); | |
c906108c SS |
5003 | |
5004 | shell_file = tryname; | |
5005 | } | |
5006 | ||
c3f6f71d JM |
5007 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
5008 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
5009 | |
5010 | /* We are at the first instruction we care about. */ | |
5011 | /* Pedal to the metal... */ | |
5012 | ||
2acceee2 | 5013 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
5014 | } |
5015 | ||
c3f6f71d JM |
5016 | /* |
5017 | * Function: notice_thread | |
5018 | * | |
5019 | * Callback for find_new_threads. | |
5020 | * Calls "add_thread". | |
5021 | */ | |
c906108c | 5022 | |
c3f6f71d | 5023 | static int |
fba45db2 | 5024 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5025 | { |
39f77062 | 5026 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5027 | |
c3f6f71d JM |
5028 | if (!in_thread_list (gdb_threadid)) |
5029 | add_thread (gdb_threadid); | |
c906108c | 5030 | |
c3f6f71d JM |
5031 | return 0; |
5032 | } | |
5033 | ||
5034 | /* | |
5035 | * Function: target_find_new_threads | |
5036 | * | |
5037 | * Query all the threads that the target knows about, | |
5038 | * and give them back to GDB to add to its list. | |
5039 | */ | |
5040 | ||
5041 | void | |
fba45db2 | 5042 | procfs_find_new_threads (void) |
c3f6f71d JM |
5043 | { |
5044 | procinfo *pi; | |
5045 | ||
5046 | /* Find procinfo for main process */ | |
39f77062 | 5047 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5048 | proc_update_threads (pi); |
5049 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5050 | } |
5051 | ||
c3f6f71d JM |
5052 | /* |
5053 | * Function: target_thread_alive | |
5054 | * | |
5055 | * Return true if the thread is still 'alive'. | |
5056 | * | |
5057 | * This guy doesn't really seem to be doing his job. | |
5058 | * Got to investigate how to tell when a thread is really gone. | |
5059 | */ | |
c906108c | 5060 | |
c906108c | 5061 | static int |
39f77062 | 5062 | procfs_thread_alive (ptid_t ptid) |
c906108c | 5063 | { |
c3f6f71d JM |
5064 | int proc, thread; |
5065 | procinfo *pi; | |
c906108c | 5066 | |
39f77062 KB |
5067 | proc = PIDGET (ptid); |
5068 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5069 | /* If I don't know it, it ain't alive! */ |
5070 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5071 | return 0; | |
5072 | ||
5073 | /* If I can't get its status, it ain't alive! | |
5074 | What's more, I need to forget about it! */ | |
5075 | if (!proc_get_status (pi)) | |
5076 | { | |
5077 | destroy_procinfo (pi); | |
5078 | return 0; | |
5079 | } | |
5080 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5081 | return 1; | |
c906108c | 5082 | } |
c3f6f71d JM |
5083 | |
5084 | /* | |
5085 | * Function: target_pid_to_str | |
5086 | * | |
5087 | * Return a string to be used to identify the thread in | |
5088 | * the "info threads" display. | |
5089 | */ | |
5090 | ||
5091 | char * | |
39f77062 | 5092 | procfs_pid_to_str (ptid_t ptid) |
c3f6f71d JM |
5093 | { |
5094 | static char buf[80]; | |
5095 | int proc, thread; | |
5096 | procinfo *pi; | |
5097 | ||
39f77062 KB |
5098 | proc = PIDGET (ptid); |
5099 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5100 | pi = find_procinfo (proc, thread); |
5101 | ||
5102 | if (thread == 0) | |
5103 | sprintf (buf, "Process %d", proc); | |
5104 | else | |
5105 | sprintf (buf, "LWP %d", thread); | |
5106 | return &buf[0]; | |
5107 | } | |
5108 | ||
5109 | /* | |
5110 | * Function: procfs_set_watchpoint | |
5111 | * Insert a watchpoint | |
5112 | */ | |
5113 | ||
5114 | int | |
39f77062 KB |
5115 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
5116 | int after) | |
c906108c | 5117 | { |
c3f6f71d | 5118 | #ifndef UNIXWARE |
37de36c6 | 5119 | #ifndef AIX5 |
c3f6f71d JM |
5120 | int pflags = 0; |
5121 | procinfo *pi; | |
5122 | ||
39f77062 KB |
5123 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
5124 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); | |
c3f6f71d JM |
5125 | |
5126 | /* Translate from GDB's flags to /proc's */ | |
5127 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5128 | { |
c3f6f71d JM |
5129 | switch (rwflag) { /* FIXME: need an enum! */ |
5130 | case hw_write: /* default watchpoint (write) */ | |
5131 | pflags = WRITE_WATCHFLAG; | |
5132 | break; | |
5133 | case hw_read: /* read watchpoint */ | |
5134 | pflags = READ_WATCHFLAG; | |
5135 | break; | |
5136 | case hw_access: /* access watchpoint */ | |
5137 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5138 | break; | |
5139 | case hw_execute: /* execution HW breakpoint */ | |
5140 | pflags = EXEC_WATCHFLAG; | |
5141 | break; | |
5142 | default: /* Something weird. Return error. */ | |
c906108c | 5143 | return -1; |
c3f6f71d JM |
5144 | } |
5145 | if (after) /* Stop after r/w access is completed. */ | |
5146 | pflags |= AFTER_WATCHFLAG; | |
5147 | } | |
5148 | ||
5149 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5150 | { | |
5151 | if (errno == E2BIG) /* Typical error for no resources */ | |
5152 | return -1; /* fail */ | |
5153 | /* GDB may try to remove the same watchpoint twice. | |
5154 | If a remove request returns no match, don't error. */ | |
c906108c | 5155 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5156 | return 0; /* ignore */ |
5157 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5158 | } |
37de36c6 KB |
5159 | #endif /* AIX5 */ |
5160 | #endif /* UNIXWARE */ | |
c906108c SS |
5161 | return 0; |
5162 | } | |
5163 | ||
1e03ad20 KB |
5164 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5165 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5166 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5167 | far. | |
5168 | ||
5169 | Note: procfs_can_use_hw_breakpoint() is not yet used by all | |
5170 | procfs.c targets due to the fact that some of them still define | |
5171 | TARGET_CAN_USE_HARDWARE_WATCHPOINT. */ | |
5172 | ||
5173 | static int | |
5174 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5175 | { | |
5176 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS | |
5177 | return 0; | |
5178 | #else | |
5179 | /* Due to the way that proc_set_watchpoint() is implemented, host | |
5180 | and target pointers must be of the same size. If they are not, | |
5181 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5182 | fact that proc_set_watchpoint() calls |
5183 | procfs_address_to_host_pointer(); a close inspection of | |
5184 | procfs_address_to_host_pointer will reveal that an internal error | |
5185 | will be generated when the host and target pointer sizes are | |
5186 | different. */ | |
1e03ad20 KB |
5187 | if (sizeof (void *) != TYPE_LENGTH (builtin_type_void_data_ptr)) |
5188 | return 0; | |
5189 | ||
5190 | /* Other tests here??? */ | |
5191 | ||
5192 | return 1; | |
5193 | #endif | |
5194 | } | |
5195 | ||
c3f6f71d JM |
5196 | /* |
5197 | * Function: stopped_by_watchpoint | |
5198 | * | |
5199 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5200 | * else returns zero. | |
5201 | */ | |
5202 | ||
c906108c | 5203 | int |
39f77062 | 5204 | procfs_stopped_by_watchpoint (ptid_t ptid) |
c906108c | 5205 | { |
c3f6f71d | 5206 | procinfo *pi; |
c906108c | 5207 | |
39f77062 KB |
5208 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
5209 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); | |
aaeb7efa MS |
5210 | |
5211 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5212 | return 0; | |
5213 | ||
c3f6f71d | 5214 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5215 | { |
c3f6f71d JM |
5216 | if (proc_why (pi) == PR_FAULTED) |
5217 | { | |
c906108c | 5218 | #ifdef FLTWATCH |
c3f6f71d JM |
5219 | if (proc_what (pi) == FLTWATCH) |
5220 | return 1; | |
c906108c SS |
5221 | #endif |
5222 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5223 | if (proc_what (pi) == FLTKWATCH) |
5224 | return 1; | |
c906108c | 5225 | #endif |
c3f6f71d | 5226 | } |
c906108c SS |
5227 | } |
5228 | return 0; | |
5229 | } | |
c906108c | 5230 | |
c3f6f71d JM |
5231 | #ifdef TM_I386SOL2_H |
5232 | /* | |
5233 | * Function: procfs_find_LDT_entry | |
5234 | * | |
5235 | * Input: | |
39f77062 | 5236 | * ptid_t ptid; // The GDB-style pid-plus-LWP. |
c3f6f71d JM |
5237 | * |
5238 | * Return: | |
5239 | * pointer to the corresponding LDT entry. | |
5240 | */ | |
c906108c | 5241 | |
c3f6f71d | 5242 | struct ssd * |
39f77062 | 5243 | procfs_find_LDT_entry (ptid_t ptid) |
c906108c | 5244 | { |
c3f6f71d JM |
5245 | gdb_gregset_t *gregs; |
5246 | int key; | |
5247 | procinfo *pi; | |
c906108c | 5248 | |
c3f6f71d | 5249 | /* Find procinfo for the lwp. */ |
39f77062 | 5250 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) |
c906108c | 5251 | { |
39f77062 KB |
5252 | warning ("procfs_find_LDT_entry: could not find procinfo for %d:%d.", |
5253 | PIDGET (ptid), TIDGET (ptid)); | |
c3f6f71d | 5254 | return NULL; |
c906108c | 5255 | } |
c3f6f71d JM |
5256 | /* get its general registers. */ |
5257 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
5258 | { | |
39f77062 KB |
5259 | warning ("procfs_find_LDT_entry: could not read gregs for %d:%d.", |
5260 | PIDGET (ptid), TIDGET (ptid)); | |
c3f6f71d JM |
5261 | return NULL; |
5262 | } | |
5263 | /* Now extract the GS register's lower 16 bits. */ | |
5264 | key = (*gregs)[GS] & 0xffff; | |
5265 | ||
5266 | /* Find the matching entry and return it. */ | |
5267 | return proc_get_LDT_entry (pi, key); | |
c906108c | 5268 | } |
c3f6f71d | 5269 | #endif /* TM_I386SOL2_H */ |
c906108c | 5270 | |
831e682e MS |
5271 | /* |
5272 | * Memory Mappings Functions: | |
5273 | */ | |
5274 | ||
5275 | /* | |
5276 | * Function: iterate_over_mappings | |
5277 | * | |
5278 | * Call a callback function once for each mapping, passing it the mapping, | |
5279 | * an optional secondary callback function, and some optional opaque data. | |
5280 | * Quit and return the first non-zero value returned from the callback. | |
5281 | * | |
5282 | * Arguments: | |
5283 | * pi -- procinfo struct for the process to be mapped. | |
5284 | * func -- callback function to be called by this iterator. | |
5285 | * data -- optional opaque data to be passed to the callback function. | |
5286 | * child_func -- optional secondary function pointer to be passed | |
5287 | * to the child function. | |
5288 | * | |
5289 | * Return: First non-zero return value from the callback function, | |
5290 | * or zero. | |
5291 | */ | |
5292 | ||
5293 | static int | |
5294 | iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data, | |
5295 | int (*func) (struct prmap *map, | |
5296 | int (*child_func) (), | |
5297 | void *data)) | |
5298 | { | |
5299 | char pathname[MAX_PROC_NAME_SIZE]; | |
5300 | struct prmap *prmaps; | |
5301 | struct prmap *prmap; | |
5302 | int funcstat; | |
5303 | int map_fd; | |
5304 | int nmap; | |
5305 | #ifdef NEW_PROC_API | |
5306 | struct stat sbuf; | |
5307 | #endif | |
5308 | ||
5309 | /* Get the number of mappings, allocate space, | |
5310 | and read the mappings into prmaps. */ | |
5311 | #ifdef NEW_PROC_API | |
5312 | /* Open map fd. */ | |
5313 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5314 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5315 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5316 | ||
5317 | /* Make sure it gets closed again. */ | |
5318 | make_cleanup_close (map_fd); | |
5319 | ||
5320 | /* Use stat to determine the file size, and compute | |
5321 | the number of prmap_t objects it contains. */ | |
5322 | if (fstat (map_fd, &sbuf) != 0) | |
5323 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5324 | ||
5325 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5326 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5327 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5328 | != (nmap * sizeof (*prmaps))) | |
5329 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5330 | #else | |
5331 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5332 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5333 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5334 | ||
5335 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5336 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5337 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5338 | #endif | |
5339 | ||
5340 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5341 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5342 | return funcstat; | |
5343 | ||
5344 | return 0; | |
5345 | } | |
5346 | ||
5347 | /* | |
5348 | * Function: solib_mappings_callback | |
5349 | * | |
5350 | * Calls the supplied callback function once for each mapped address | |
5351 | * space in the process. The callback function receives an open | |
5352 | * file descriptor for the file corresponding to that mapped | |
5353 | * address space (if there is one), and the base address of the | |
5354 | * mapped space. Quit when the callback function returns a | |
5355 | * nonzero value, or at teh end of the mappings. | |
5356 | * | |
5357 | * Returns: the first non-zero return value of the callback function, | |
5358 | * or zero. | |
5359 | */ | |
5360 | ||
5361 | int solib_mappings_callback (struct prmap *map, | |
5362 | int (*func) (int, CORE_ADDR), | |
5363 | void *data) | |
5364 | { | |
5365 | procinfo *pi = data; | |
5366 | int fd; | |
5367 | ||
5368 | #ifdef NEW_PROC_API | |
5369 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
5370 | ||
5371 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
5372 | return -1; /* sanity */ | |
5373 | ||
5374 | if (map->pr_mapname[0] == 0) | |
5375 | { | |
5376 | fd = -1; /* no map file */ | |
5377 | } | |
5378 | else | |
5379 | { | |
5380 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
5381 | /* Note: caller's responsibility to close this fd! */ | |
5382 | fd = open_with_retry (name, O_RDONLY); | |
5383 | /* Note: we don't test the above call for failure; | |
5384 | we just pass the FD on as given. Sometimes there is | |
5385 | no file, so the open may return failure, but that's | |
5386 | not a problem. */ | |
5387 | } | |
5388 | #else | |
5389 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
5390 | /* Note: we don't test the above call for failure; | |
5391 | we just pass the FD on as given. Sometimes there is | |
5392 | no file, so the ioctl may return failure, but that's | |
5393 | not a problem. */ | |
5394 | #endif | |
5395 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
5396 | } | |
5397 | ||
5398 | /* | |
5399 | * Function: proc_iterate_over_mappings | |
5400 | * | |
5401 | * Uses the unified "iterate_over_mappings" function | |
5402 | * to implement the exported interface to solib-svr4.c. | |
5403 | * | |
5404 | * Given a pointer to a function, call that function once for every | |
5405 | * mapped address space in the process. The callback function | |
5406 | * receives an open file descriptor for the file corresponding to | |
5407 | * that mapped address space (if there is one), and the base address | |
5408 | * of the mapped space. Quit when the callback function returns a | |
5409 | * nonzero value, or at teh end of the mappings. | |
5410 | * | |
5411 | * Returns: the first non-zero return value of the callback function, | |
5412 | * or zero. | |
5413 | */ | |
5414 | ||
5415 | int | |
5416 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) | |
5417 | { | |
5418 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5419 | ||
5420 | return iterate_over_mappings (pi, func, pi, solib_mappings_callback); | |
5421 | } | |
5422 | ||
be4d1333 MS |
5423 | /* |
5424 | * Function: find_memory_regions_callback | |
5425 | * | |
5426 | * Implements the to_find_memory_regions method. | |
5427 | * Calls an external function for each memory region. | |
5428 | * External function will have the signiture: | |
5429 | * | |
5430 | * int callback (CORE_ADDR vaddr, | |
5431 | * unsigned long size, | |
5432 | * int read, int write, int execute, | |
5433 | * void *data); | |
5434 | * | |
5435 | * Returns the integer value returned by the callback. | |
5436 | */ | |
5437 | ||
5438 | static int | |
5439 | find_memory_regions_callback (struct prmap *map, | |
5440 | int (*func) (CORE_ADDR, | |
5441 | unsigned long, | |
5442 | int, int, int, | |
5443 | void *), | |
5444 | void *data) | |
5445 | { | |
6dbdc4a3 | 5446 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
be4d1333 MS |
5447 | map->pr_size, |
5448 | (map->pr_mflags & MA_READ) != 0, | |
5449 | (map->pr_mflags & MA_WRITE) != 0, | |
5450 | (map->pr_mflags & MA_EXEC) != 0, | |
5451 | data); | |
5452 | } | |
5453 | ||
5454 | /* | |
5455 | * Function: proc_find_memory_regions | |
5456 | * | |
5457 | * External interface. Calls a callback function once for each | |
5458 | * mapped memory region in the child process, passing as arguments | |
5459 | * CORE_ADDR virtual_address, | |
5460 | * unsigned long size, | |
5461 | * int read, TRUE if region is readable by the child | |
5462 | * int write, TRUE if region is writable by the child | |
5463 | * int execute TRUE if region is executable by the child. | |
5464 | * | |
5465 | * Stops iterating and returns the first non-zero value | |
5466 | * returned by the callback. | |
5467 | */ | |
5468 | ||
5469 | static int | |
5470 | proc_find_memory_regions (int (*func) (CORE_ADDR, | |
5471 | unsigned long, | |
5472 | int, int, int, | |
5473 | void *), | |
5474 | void *data) | |
5475 | { | |
5476 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5477 | ||
5478 | return iterate_over_mappings (pi, func, data, | |
5479 | find_memory_regions_callback); | |
5480 | } | |
5481 | ||
388faa48 MS |
5482 | /* |
5483 | * Function: mappingflags | |
5484 | * | |
5485 | * Returns an ascii representation of a memory mapping's flags. | |
5486 | */ | |
c3f6f71d | 5487 | |
388faa48 | 5488 | static char * |
5ae5f592 | 5489 | mappingflags (long flags) |
388faa48 MS |
5490 | { |
5491 | static char asciiflags[8]; | |
5492 | ||
5493 | strcpy (asciiflags, "-------"); | |
5494 | #if defined (MA_PHYS) | |
5495 | if (flags & MA_PHYS) | |
5496 | asciiflags[0] = 'd'; | |
5497 | #endif | |
5498 | if (flags & MA_STACK) | |
5499 | asciiflags[1] = 's'; | |
5500 | if (flags & MA_BREAK) | |
5501 | asciiflags[2] = 'b'; | |
5502 | if (flags & MA_SHARED) | |
5503 | asciiflags[3] = 's'; | |
5504 | if (flags & MA_READ) | |
5505 | asciiflags[4] = 'r'; | |
5506 | if (flags & MA_WRITE) | |
5507 | asciiflags[5] = 'w'; | |
5508 | if (flags & MA_EXEC) | |
5509 | asciiflags[6] = 'x'; | |
5510 | return (asciiflags); | |
5511 | } | |
5512 | ||
831e682e MS |
5513 | /* |
5514 | * Function: info_mappings_callback | |
5515 | * | |
5516 | * Callback function, does the actual work for 'info proc mappings'. | |
5517 | */ | |
5518 | ||
5519 | /* ARGSUSED */ | |
5520 | static int | |
5521 | info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused) | |
5522 | { | |
5523 | char *data_fmt_string; | |
5524 | ||
5525 | if (TARGET_ADDR_BIT == 32) | |
5526 | data_fmt_string = "\t%#10lx %#10lx %#10x %#10x %7s\n"; | |
5527 | else | |
5528 | data_fmt_string = " %#18lx %#18lx %#10x %#10x %7s\n"; | |
5529 | ||
5530 | printf_filtered (data_fmt_string, | |
5531 | (unsigned long) map->pr_vaddr, | |
5532 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
5533 | map->pr_size, | |
5534 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ | |
5535 | (unsigned int) map->pr_offset, | |
5536 | #else | |
5537 | map->pr_off, | |
5538 | #endif | |
5539 | mappingflags (map->pr_mflags)); | |
5540 | ||
5541 | return 0; | |
5542 | } | |
5543 | ||
388faa48 MS |
5544 | /* |
5545 | * Function: info_proc_mappings | |
5546 | * | |
5547 | * Implement the "info proc mappings" subcommand. | |
5548 | */ | |
5549 | ||
5550 | static void | |
5551 | info_proc_mappings (procinfo *pi, int summary) | |
5552 | { | |
831e682e | 5553 | char *header_fmt_string; |
388faa48 MS |
5554 | |
5555 | if (TARGET_PTR_BIT == 32) | |
831e682e | 5556 | header_fmt_string = "\t%10s %10s %10s %10s %7s\n"; |
388faa48 | 5557 | else |
831e682e | 5558 | header_fmt_string = " %18s %18s %10s %10s %7s\n"; |
388faa48 MS |
5559 | |
5560 | if (summary) | |
5561 | return; /* No output for summary mode. */ | |
5562 | ||
388faa48 MS |
5563 | printf_filtered ("Mapped address spaces:\n\n"); |
5564 | printf_filtered (header_fmt_string, | |
5565 | "Start Addr", | |
5566 | " End Addr", | |
5567 | " Size", | |
5568 | " Offset", | |
5569 | "Flags"); | |
5570 | ||
831e682e | 5571 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5572 | printf_filtered ("\n"); |
5573 | } | |
5574 | ||
5575 | /* | |
5576 | * Function: info_proc_cmd | |
5577 | * | |
5578 | * Implement the "info proc" command. | |
5579 | */ | |
c3f6f71d JM |
5580 | |
5581 | static void | |
fba45db2 | 5582 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5583 | { |
c3f6f71d | 5584 | struct cleanup *old_chain; |
388faa48 MS |
5585 | procinfo *process = NULL; |
5586 | procinfo *thread = NULL; | |
5587 | char **argv = NULL; | |
5588 | char *tmp = NULL; | |
5589 | int pid = 0; | |
5590 | int tid = 0; | |
5591 | int mappings = 0; | |
c906108c | 5592 | |
c3f6f71d JM |
5593 | old_chain = make_cleanup (null_cleanup, 0); |
5594 | if (args) | |
0fda6bd2 JM |
5595 | { |
5596 | if ((argv = buildargv (args)) == NULL) | |
5597 | nomem (0); | |
5598 | else | |
004527cb | 5599 | make_cleanup_freeargv (argv); |
0fda6bd2 | 5600 | } |
c3f6f71d JM |
5601 | while (argv != NULL && *argv != NULL) |
5602 | { | |
5603 | if (isdigit (argv[0][0])) | |
5604 | { | |
5605 | pid = strtoul (argv[0], &tmp, 10); | |
5606 | if (*tmp == '/') | |
5607 | tid = strtoul (++tmp, NULL, 10); | |
5608 | } | |
5609 | else if (argv[0][0] == '/') | |
5610 | { | |
5611 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5612 | } | |
388faa48 MS |
5613 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5614 | { | |
5615 | mappings = 1; | |
5616 | } | |
c3f6f71d JM |
5617 | else |
5618 | { | |
5619 | /* [...] */ | |
5620 | } | |
5621 | argv++; | |
5622 | } | |
5623 | if (pid == 0) | |
39f77062 | 5624 | pid = PIDGET (inferior_ptid); |
c3f6f71d JM |
5625 | if (pid == 0) |
5626 | error ("No current process: you must name one."); | |
5627 | else | |
c906108c | 5628 | { |
c3f6f71d JM |
5629 | /* Have pid, will travel. |
5630 | First see if it's a process we're already debugging. */ | |
5631 | process = find_procinfo (pid, 0); | |
5632 | if (process == NULL) | |
5633 | { | |
5634 | /* No. So open a procinfo for it, but | |
5635 | remember to close it again when finished. */ | |
5636 | process = create_procinfo (pid, 0); | |
004527cb | 5637 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5638 | if (!open_procinfo_files (process, FD_CTL)) |
5639 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5640 | } | |
c906108c | 5641 | } |
c3f6f71d JM |
5642 | if (tid != 0) |
5643 | thread = create_procinfo (pid, tid); | |
5644 | ||
5645 | if (process) | |
5646 | { | |
5647 | printf_filtered ("process %d flags:\n", process->pid); | |
5648 | proc_prettyprint_flags (proc_flags (process), 1); | |
5649 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5650 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5651 | if (proc_get_nthreads (process) > 1) | |
5652 | printf_filtered ("Process has %d threads.\n", | |
5653 | proc_get_nthreads (process)); | |
5654 | } | |
5655 | if (thread) | |
5656 | { | |
5657 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5658 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5659 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5660 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5661 | } | |
5662 | ||
388faa48 MS |
5663 | if (mappings) |
5664 | { | |
5665 | info_proc_mappings (process, 0); | |
5666 | } | |
5667 | ||
c3f6f71d | 5668 | do_cleanups (old_chain); |
c906108c SS |
5669 | } |
5670 | ||
c3f6f71d | 5671 | static void |
fba45db2 | 5672 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5673 | { |
c3f6f71d JM |
5674 | procinfo *pi; |
5675 | sysset_t *sysset; | |
5676 | int syscallnum = 0; | |
c906108c | 5677 | |
39f77062 | 5678 | if (PIDGET (inferior_ptid) <= 0) |
c3f6f71d | 5679 | error ("you must be debugging a process to use this command."); |
c906108c | 5680 | |
c3f6f71d JM |
5681 | if (args == NULL || args[0] == 0) |
5682 | error_no_arg ("system call to trace"); | |
5683 | ||
39f77062 | 5684 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5685 | if (isdigit (args[0])) |
5686 | { | |
5687 | syscallnum = atoi (args); | |
5688 | if (entry_or_exit == PR_SYSENTRY) | |
5689 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5690 | else | |
5691 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5692 | |
c3f6f71d JM |
5693 | if (sysset == NULL) |
5694 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5695 | |
c3f6f71d | 5696 | if (mode == FLAG_SET) |
37de36c6 | 5697 | gdb_praddsysset (sysset, syscallnum); |
c3f6f71d | 5698 | else |
37de36c6 | 5699 | gdb_prdelsysset (sysset, syscallnum); |
c906108c | 5700 | |
c3f6f71d JM |
5701 | if (entry_or_exit == PR_SYSENTRY) |
5702 | { | |
5703 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5704 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5705 | } | |
5706 | else | |
5707 | { | |
5708 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5709 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5710 | } | |
5711 | } | |
5712 | } | |
5713 | ||
5714 | static void | |
fba45db2 | 5715 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5716 | { |
c3f6f71d JM |
5717 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5718 | } | |
c906108c | 5719 | |
c3f6f71d | 5720 | static void |
fba45db2 | 5721 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5722 | { |
5723 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5724 | } |
c906108c | 5725 | |
c3f6f71d | 5726 | static void |
fba45db2 | 5727 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5728 | { |
5729 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5730 | } | |
5731 | ||
5732 | static void | |
fba45db2 | 5733 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5734 | { |
c3f6f71d JM |
5735 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5736 | } | |
c906108c | 5737 | |
c906108c | 5738 | |
c906108c | 5739 | void |
fba45db2 | 5740 | _initialize_procfs (void) |
c906108c | 5741 | { |
c906108c SS |
5742 | init_procfs_ops (); |
5743 | add_target (&procfs_ops); | |
c3f6f71d | 5744 | add_info ("proc", info_proc_cmd, |
388faa48 MS |
5745 | "Show /proc process information about any running process.\n\ |
5746 | Specify process id, or use the program being debugged by default.\n\ | |
5747 | Specify keyword 'mappings' for detailed info on memory mappings."); | |
c3f6f71d JM |
5748 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
5749 | "Give a trace of entries into the syscall."); | |
5750 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5751 | "Give a trace of exits from the syscall."); | |
5752 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5753 | "Cancel a trace of entries into the syscall."); | |
5754 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5755 | "Cancel a trace of exits from the syscall."); | |
c3f6f71d JM |
5756 | } |
5757 | ||
5758 | /* =================== END, GDB "MODULE" =================== */ | |
5759 | ||
5760 | ||
5761 | ||
65554fef | 5762 | /* miscellaneous stubs: */ |
c3f6f71d JM |
5763 | /* The following satisfy a few random symbols mostly created by */ |
5764 | /* the solaris threads implementation, which I will chase down */ | |
5765 | /* later. */ | |
5766 | ||
5767 | /* | |
5768 | * Return a pid for which we guarantee | |
5769 | * we will be able to find a 'live' procinfo. | |
5770 | */ | |
5771 | ||
39f77062 | 5772 | ptid_t |
fba45db2 | 5773 | procfs_first_available (void) |
c3f6f71d | 5774 | { |
39f77062 | 5775 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5776 | } |
be4d1333 MS |
5777 | |
5778 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5779 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5780 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5781 | |
5782 | static char * | |
5783 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, | |
5784 | char *note_data, int *note_size) | |
5785 | { | |
5786 | gdb_gregset_t gregs; | |
5787 | gdb_fpregset_t fpregs; | |
5788 | unsigned long merged_pid; | |
5789 | ||
5790 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5791 | ||
5792 | fill_gregset (&gregs, -1); | |
65554fef MS |
5793 | #if defined (UNIXWARE) |
5794 | note_data = (char *) elfcore_write_lwpstatus (obfd, | |
5795 | note_data, | |
5796 | note_size, | |
5797 | merged_pid, | |
5798 | stop_signal, | |
5799 | &gregs); | |
5800 | #else | |
be4d1333 | 5801 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5802 | note_data, |
5803 | note_size, | |
be4d1333 MS |
5804 | merged_pid, |
5805 | stop_signal, | |
65554fef MS |
5806 | &gregs); |
5807 | #endif | |
be4d1333 MS |
5808 | fill_fpregset (&fpregs, -1); |
5809 | note_data = (char *) elfcore_write_prfpreg (obfd, | |
5810 | note_data, | |
5811 | note_size, | |
5812 | &fpregs, | |
5813 | sizeof (fpregs)); | |
5814 | return note_data; | |
5815 | } | |
5816 | ||
5817 | struct procfs_corefile_thread_data { | |
5818 | bfd *obfd; | |
5819 | char *note_data; | |
5820 | int *note_size; | |
5821 | }; | |
5822 | ||
5823 | static int | |
65554fef | 5824 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5825 | { |
5826 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5827 | |
65554fef | 5828 | if (pi != NULL && thread->tid != 0) |
be4d1333 MS |
5829 | { |
5830 | ptid_t saved_ptid = inferior_ptid; | |
65554fef MS |
5831 | inferior_ptid = MERGEPID (pi->pid, thread->tid); |
5832 | args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid, | |
be4d1333 MS |
5833 | args->note_data, |
5834 | args->note_size); | |
5835 | inferior_ptid = saved_ptid; | |
5836 | } | |
5837 | return 0; | |
5838 | } | |
5839 | ||
5840 | static char * | |
5841 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5842 | { | |
5843 | struct cleanup *old_chain; | |
5844 | gdb_gregset_t gregs; | |
5845 | gdb_fpregset_t fpregs; | |
5846 | char fname[16] = {'\0'}; | |
5847 | char psargs[80] = {'\0'}; | |
5848 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5849 | char *note_data = NULL; | |
6dbdc4a3 | 5850 | char *inf_args; |
be4d1333 MS |
5851 | struct procfs_corefile_thread_data thread_args; |
5852 | ||
5853 | if (get_exec_file (0)) | |
5854 | { | |
5855 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
5856 | strncpy (psargs, get_exec_file (0), | |
5857 | sizeof (psargs)); | |
6dbdc4a3 MS |
5858 | |
5859 | inf_args = get_inferior_args (); | |
5860 | if (inf_args && *inf_args && | |
5861 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 MS |
5862 | { |
5863 | strncat (psargs, " ", | |
5864 | sizeof (psargs) - strlen (psargs)); | |
6dbdc4a3 | 5865 | strncat (psargs, inf_args, |
be4d1333 MS |
5866 | sizeof (psargs) - strlen (psargs)); |
5867 | } | |
5868 | } | |
5869 | ||
5870 | note_data = (char *) elfcore_write_prpsinfo (obfd, | |
5871 | note_data, | |
5872 | note_size, | |
5873 | fname, | |
5874 | psargs); | |
5875 | ||
65554fef MS |
5876 | #ifdef UNIXWARE |
5877 | fill_gregset (&gregs, -1); | |
5878 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
5879 | PIDGET (inferior_ptid), | |
5880 | stop_signal, &gregs); | |
5881 | #endif | |
5882 | ||
be4d1333 MS |
5883 | thread_args.obfd = obfd; |
5884 | thread_args.note_data = note_data; | |
5885 | thread_args.note_size = note_size; | |
65554fef MS |
5886 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
5887 | ||
be4d1333 MS |
5888 | if (thread_args.note_data == note_data) |
5889 | { | |
5890 | /* iterate_over_threads didn't come up with any threads; | |
5891 | just use inferior_ptid. */ | |
5892 | note_data = procfs_do_thread_registers (obfd, inferior_ptid, | |
5893 | note_data, note_size); | |
5894 | } | |
5895 | else | |
5896 | { | |
5897 | note_data = thread_args.note_data; | |
5898 | } | |
5899 | ||
5900 | make_cleanup (xfree, note_data); | |
5901 | return note_data; | |
5902 | } | |
65554fef MS |
5903 | #else /* !(Solaris or Unixware) */ |
5904 | static char * | |
5905 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5906 | { | |
5907 | error ("gcore not implemented for this host."); | |
5908 | return NULL; /* lint */ | |
5909 | } | |
5910 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5911 | /* =================== END GCORE .NOTE "MODULE" =================== */ |