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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
0fb0cc75 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007, 2008, 2009 |
6aba47ca | 4 | Free Software Foundation, Inc. |
2555fe1a | 5 | |
c3f6f71d JM |
6 | Written by Michael Snyder at Cygnus Solutions. |
7 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 8 | |
a9762ec7 JB |
9 | This file is part of GDB. |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 3 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 23 | |
c3f6f71d JM |
24 | #include "defs.h" |
25 | #include "inferior.h" | |
26 | #include "target.h" | |
27 | #include "gdbcore.h" | |
65554fef | 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 29 | #include "gdbcmd.h" |
0fda6bd2 | 30 | #include "gdbthread.h" |
7f7fe91e | 31 | #include "regcache.h" |
28439f5e | 32 | #include "inf-child.h" |
c906108c | 33 | |
c3f6f71d JM |
34 | #if defined (NEW_PROC_API) |
35 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
36 | #endif | |
c906108c | 37 | |
c3f6f71d | 38 | #include <sys/procfs.h> |
37de36c6 | 39 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 40 | #include <sys/fault.h> |
37de36c6 KB |
41 | #endif |
42 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 43 | #include <sys/syscall.h> |
37de36c6 | 44 | #endif |
c3f6f71d | 45 | #include <sys/errno.h> |
2555fe1a | 46 | #include "gdb_wait.h" |
0fda6bd2 JM |
47 | #include <signal.h> |
48 | #include <ctype.h> | |
19958708 | 49 | #include "gdb_string.h" |
df8f7274 | 50 | #include "gdb_assert.h" |
44270758 | 51 | #include "inflow.h" |
4e73f23d | 52 | #include "auxv.h" |
0fda6bd2 | 53 | |
19958708 | 54 | /* |
c3f6f71d JM |
55 | * PROCFS.C |
56 | * | |
57 | * This module provides the interface between GDB and the | |
58 | * /proc file system, which is used on many versions of Unix | |
59 | * as a means for debuggers to control other processes. | |
60 | * Examples of the systems that use this interface are: | |
61 | * Irix | |
62 | * Solaris | |
63 | * OSF | |
64 | * Unixware | |
37de36c6 | 65 | * AIX5 |
c3f6f71d | 66 | * |
65554fef | 67 | * /proc works by imitating a file system: you open a simulated file |
c3f6f71d JM |
68 | * that represents the process you wish to interact with, and |
69 | * perform operations on that "file" in order to examine or change | |
70 | * the state of the other process. | |
71 | * | |
72 | * The most important thing to know about /proc and this module | |
73 | * is that there are two very different interfaces to /proc: | |
74 | * One that uses the ioctl system call, and | |
75 | * another that uses read and write system calls. | |
76 | * This module has to support both /proc interfaces. This means | |
77 | * that there are two different ways of doing every basic operation. | |
78 | * | |
19958708 | 79 | * In order to keep most of the code simple and clean, I have |
c3f6f71d JM |
80 | * defined an interface "layer" which hides all these system calls. |
81 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
82 | * and most or all occurrances of this ifdef should be confined to | |
83 | * this interface layer. | |
c906108c SS |
84 | */ |
85 | ||
86 | ||
c3f6f71d | 87 | /* Determine which /proc API we are using: |
19958708 | 88 | The ioctl API defines PIOCSTATUS, while |
c3f6f71d | 89 | the read/write (multiple fd) API never does. */ |
c906108c | 90 | |
c3f6f71d | 91 | #ifdef NEW_PROC_API |
c906108c | 92 | #include <sys/types.h> |
4b14d3e4 | 93 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 94 | #endif |
c906108c | 95 | |
c3f6f71d JM |
96 | #include <fcntl.h> /* for O_RDONLY */ |
97 | #include <unistd.h> /* for "X_OK" */ | |
98 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 99 | |
103b3ef5 MS |
100 | /* Note: procfs-utils.h must be included after the above system header |
101 | files, because it redefines various system calls using macros. | |
102 | This may be incompatible with the prototype declarations. */ | |
103 | ||
103b3ef5 MS |
104 | #include "proc-utils.h" |
105 | ||
c60c0f5f MS |
106 | /* Prototypes for supply_gregset etc. */ |
107 | #include "gregset.h" | |
108 | ||
c3f6f71d | 109 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 110 | |
c3f6f71d JM |
111 | /* |
112 | * This module defines the GDB target vector and its methods. | |
113 | */ | |
c906108c | 114 | |
136d6dae VP |
115 | static void procfs_attach (struct target_ops *, char *, int); |
116 | static void procfs_detach (struct target_ops *, char *, int); | |
28439f5e PA |
117 | static void procfs_resume (struct target_ops *, |
118 | ptid_t, int, enum target_signal); | |
f9c72d52 | 119 | static void procfs_stop (ptid_t); |
a14ed312 | 120 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
121 | static void procfs_fetch_registers (struct target_ops *, |
122 | struct regcache *, int); | |
123 | static void procfs_store_registers (struct target_ops *, | |
124 | struct regcache *, int); | |
39f77062 | 125 | static void procfs_notice_signals (ptid_t); |
7d85a9c0 | 126 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae VP |
127 | static void procfs_mourn_inferior (struct target_ops *ops); |
128 | static void procfs_create_inferior (struct target_ops *, char *, | |
129 | char *, char **, int); | |
117de6a9 PA |
130 | static ptid_t procfs_wait (struct target_ops *, |
131 | ptid_t, struct target_waitstatus *); | |
0b62613e | 132 | static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
043780a1 AC |
133 | struct mem_attrib *attrib, |
134 | struct target_ops *); | |
4e73f23d RM |
135 | static LONGEST procfs_xfer_partial (struct target_ops *ops, |
136 | enum target_object object, | |
137 | const char *annex, | |
0b62613e | 138 | gdb_byte *readbuf, const gdb_byte *writebuf, |
4e73f23d | 139 | ULONGEST offset, LONGEST len); |
a14ed312 | 140 | |
28439f5e | 141 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 142 | |
28439f5e | 143 | void procfs_find_new_threads (struct target_ops *ops); |
117de6a9 | 144 | char *procfs_pid_to_str (struct target_ops *, ptid_t); |
c3f6f71d | 145 | |
19958708 RM |
146 | static int proc_find_memory_regions (int (*) (CORE_ADDR, |
147 | unsigned long, | |
148 | int, int, int, | |
149 | void *), | |
be4d1333 MS |
150 | void *); |
151 | ||
152 | static char * procfs_make_note_section (bfd *, int *); | |
153 | ||
1e03ad20 KB |
154 | static int procfs_can_use_hw_breakpoint (int, int, int); |
155 | ||
c47ffbe3 VP |
156 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
157 | /* When GDB is built as 64-bit application on Solaris, the auxv data is | |
158 | presented in 64-bit format. We need to provide a custom parser to handle | |
159 | that. */ | |
160 | static int | |
161 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
162 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
163 | { | |
c47ffbe3 VP |
164 | gdb_byte *ptr = *readptr; |
165 | ||
166 | if (endptr == ptr) | |
167 | return 0; | |
168 | ||
169 | if (endptr - ptr < 8 * 2) | |
170 | return -1; | |
171 | ||
172 | *typep = extract_unsigned_integer (ptr, 4); | |
173 | ptr += 8; | |
174 | /* The size of data is always 64-bit. If the application is 32-bit, | |
175 | it will be zero extended, as expected. */ | |
176 | *valp = extract_unsigned_integer (ptr, 8); | |
177 | ptr += 8; | |
178 | ||
179 | *readptr = ptr; | |
180 | return 1; | |
181 | } | |
182 | #endif | |
183 | ||
28439f5e PA |
184 | static struct target_ops * |
185 | procfs_target (void) | |
c3f6f71d | 186 | { |
28439f5e PA |
187 | struct target_ops *t = inf_child_target (); |
188 | ||
189 | t->to_shortname = "procfs"; | |
190 | t->to_longname = "Unix /proc child process"; | |
191 | t->to_doc = | |
c3f6f71d | 192 | "Unix /proc child process (started by the \"run\" command)."; |
28439f5e PA |
193 | t->to_create_inferior = procfs_create_inferior; |
194 | t->to_kill = procfs_kill_inferior; | |
195 | t->to_mourn_inferior = procfs_mourn_inferior; | |
196 | t->to_attach = procfs_attach; | |
197 | t->to_detach = procfs_detach; | |
198 | t->to_wait = procfs_wait; | |
199 | t->to_resume = procfs_resume; | |
200 | t->to_fetch_registers = procfs_fetch_registers; | |
201 | t->to_store_registers = procfs_store_registers; | |
202 | t->to_xfer_partial = procfs_xfer_partial; | |
203 | t->deprecated_xfer_memory = procfs_xfer_memory; | |
204 | t->to_notice_signals = procfs_notice_signals; | |
205 | t->to_files_info = procfs_files_info; | |
206 | t->to_stop = procfs_stop; | |
207 | ||
208 | t->to_find_new_threads = procfs_find_new_threads; | |
209 | t->to_thread_alive = procfs_thread_alive; | |
210 | t->to_pid_to_str = procfs_pid_to_str; | |
211 | ||
212 | t->to_has_thread_control = tc_schedlock; | |
213 | t->to_find_memory_regions = proc_find_memory_regions; | |
214 | t->to_make_corefile_notes = procfs_make_note_section; | |
215 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; | |
c47ffbe3 VP |
216 | |
217 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 218 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
219 | #endif |
220 | ||
28439f5e PA |
221 | t->to_magic = OPS_MAGIC; |
222 | ||
223 | return t; | |
c3f6f71d | 224 | } |
c906108c | 225 | |
c3f6f71d JM |
226 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
227 | ||
c3f6f71d JM |
228 | /* |
229 | * World Unification: | |
230 | * | |
231 | * Put any typedefs, defines etc. here that are required for | |
232 | * the unification of code that handles different versions of /proc. | |
233 | */ | |
234 | ||
235 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 236 | #ifdef WA_READ |
19958708 | 237 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
238 | WRITE_WATCHFLAG = WA_WRITE, |
239 | EXEC_WATCHFLAG = WA_EXEC, | |
240 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
241 | }; | |
242 | #endif | |
243 | #else /* Irix method for watchpoints */ | |
19958708 | 244 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
245 | WRITE_WATCHFLAG = MA_WRITE, |
246 | EXEC_WATCHFLAG = MA_EXEC, | |
247 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
248 | }; | |
249 | #endif | |
250 | ||
37de36c6 KB |
251 | /* gdb_sigset_t */ |
252 | #ifdef HAVE_PR_SIGSET_T | |
253 | typedef pr_sigset_t gdb_sigset_t; | |
254 | #else | |
255 | typedef sigset_t gdb_sigset_t; | |
256 | #endif | |
257 | ||
258 | /* sigaction */ | |
259 | #ifdef HAVE_PR_SIGACTION64_T | |
260 | typedef pr_sigaction64_t gdb_sigaction_t; | |
261 | #else | |
262 | typedef struct sigaction gdb_sigaction_t; | |
263 | #endif | |
264 | ||
265 | /* siginfo */ | |
266 | #ifdef HAVE_PR_SIGINFO64_T | |
267 | typedef pr_siginfo64_t gdb_siginfo_t; | |
268 | #else | |
269 | typedef struct siginfo gdb_siginfo_t; | |
270 | #endif | |
271 | ||
272 | /* gdb_premptysysset */ | |
273 | #ifdef premptysysset | |
274 | #define gdb_premptysysset premptysysset | |
275 | #else | |
276 | #define gdb_premptysysset premptyset | |
277 | #endif | |
278 | ||
279 | /* praddsysset */ | |
280 | #ifdef praddsysset | |
281 | #define gdb_praddsysset praddsysset | |
282 | #else | |
283 | #define gdb_praddsysset praddset | |
284 | #endif | |
285 | ||
286 | /* prdelsysset */ | |
287 | #ifdef prdelsysset | |
288 | #define gdb_prdelsysset prdelsysset | |
289 | #else | |
290 | #define gdb_prdelsysset prdelset | |
291 | #endif | |
292 | ||
293 | /* prissyssetmember */ | |
294 | #ifdef prissyssetmember | |
295 | #define gdb_pr_issyssetmember prissyssetmember | |
296 | #else | |
297 | #define gdb_pr_issyssetmember prismember | |
298 | #endif | |
299 | ||
300 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
301 | as intuitively descriptive as it could be, so we'll define | |
302 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
303 | this writing, this feature is only found on AIX5 systems and | |
304 | basically means that the set of syscalls is not fixed. I.e, | |
305 | there's no nice table that one can #include to get all of the | |
306 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
307 | for each process. We are at least guaranteed that they won't | |
308 | change over the lifetime of the process. But each process could | |
309 | (in theory) have different syscall numbers. | |
310 | */ | |
311 | #ifdef HAVE_PRSYSENT_T | |
312 | #define DYNAMIC_SYSCALLS | |
313 | #endif | |
c3f6f71d JM |
314 | |
315 | ||
316 | ||
317 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
318 | ||
319 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
320 | ||
321 | /* The procinfo struct is a wrapper to hold all the state information | |
322 | concerning a /proc process. There should be exactly one procinfo | |
323 | for each process, and since GDB currently can debug only one | |
324 | process at a time, that means there should be only one procinfo. | |
325 | All of the LWP's of a process can be accessed indirectly thru the | |
326 | single process procinfo. | |
327 | ||
328 | However, against the day when GDB may debug more than one process, | |
329 | this data structure is kept in a list (which for now will hold no | |
330 | more than one member), and many functions will have a pointer to a | |
331 | procinfo as an argument. | |
332 | ||
333 | There will be a separate procinfo structure for use by the (not yet | |
334 | implemented) "info proc" command, so that we can print useful | |
335 | information about any random process without interfering with the | |
336 | inferior's procinfo information. */ | |
337 | ||
338 | #ifdef NEW_PROC_API | |
339 | /* format strings for /proc paths */ | |
340 | # ifndef CTL_PROC_NAME_FMT | |
341 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
342 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
343 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
344 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
345 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
346 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
347 | # endif | |
348 | /* the name of the proc status struct depends on the implementation */ | |
349 | typedef pstatus_t gdb_prstatus_t; | |
350 | typedef lwpstatus_t gdb_lwpstatus_t; | |
351 | #else /* ! NEW_PROC_API */ | |
352 | /* format strings for /proc paths */ | |
353 | # ifndef CTL_PROC_NAME_FMT | |
354 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
355 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
356 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
357 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
358 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
359 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
360 | # endif | |
c906108c | 361 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 362 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
363 | typedef prstatus_t gdb_lwpstatus_t; |
364 | #endif /* NEW_PROC_API */ | |
c906108c | 365 | |
c3f6f71d JM |
366 | typedef struct procinfo { |
367 | struct procinfo *next; | |
368 | int pid; /* Process ID */ | |
369 | int tid; /* Thread/LWP id */ | |
c906108c | 370 | |
c3f6f71d JM |
371 | /* process state */ |
372 | int was_stopped; | |
373 | int ignore_next_sigstop; | |
c906108c | 374 | |
19958708 | 375 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
376 | several different fd's, depending on the version of /proc |
377 | (old ioctl or new read/write). */ | |
c906108c | 378 | |
c3f6f71d JM |
379 | int ctl_fd; /* File descriptor for /proc control file */ |
380 | /* | |
381 | * The next three file descriptors are actually only needed in the | |
382 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
19958708 | 383 | * However, to avoid a bunch of #ifdefs in the code, we will use |
c3f6f71d JM |
384 | * them uniformly by (in the case of the ioctl single-file-descriptor |
385 | * implementation) filling them with copies of the control fd. | |
386 | */ | |
387 | int status_fd; /* File descriptor for /proc status file */ | |
388 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 389 | |
c3f6f71d | 390 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 391 | |
c3f6f71d | 392 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
393 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
394 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
395 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
396 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 397 | |
c3f6f71d | 398 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 399 | |
c3f6f71d JM |
400 | #ifndef NEW_PROC_API |
401 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 402 | #endif |
37de36c6 KB |
403 | |
404 | #ifdef DYNAMIC_SYSCALLS | |
405 | int num_syscalls; /* Total number of syscalls */ | |
406 | char **syscall_names; /* Syscall number to name map */ | |
407 | #endif | |
19958708 | 408 | |
c3f6f71d | 409 | struct procinfo *thread_list; |
c906108c | 410 | |
c3f6f71d JM |
411 | int status_valid : 1; |
412 | int gregs_valid : 1; | |
413 | int fpregs_valid : 1; | |
414 | int threads_valid: 1; | |
415 | } procinfo; | |
c906108c | 416 | |
c3f6f71d | 417 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 418 | |
c3f6f71d | 419 | /* Function prototypes for procinfo module: */ |
c906108c | 420 | |
a14ed312 KB |
421 | static procinfo *find_procinfo_or_die (int pid, int tid); |
422 | static procinfo *find_procinfo (int pid, int tid); | |
423 | static procinfo *create_procinfo (int pid, int tid); | |
424 | static void destroy_procinfo (procinfo * p); | |
004527cb | 425 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
426 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
427 | static int open_procinfo_files (procinfo * p, int which); | |
428 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
429 | static int sysset_t_size (procinfo *p); |
430 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
431 | #ifdef DYNAMIC_SYSCALLS | |
432 | static void load_syscalls (procinfo *pi); | |
433 | static void free_syscalls (procinfo *pi); | |
434 | static int find_syscall (procinfo *pi, char *name); | |
435 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 436 | |
c3f6f71d JM |
437 | /* The head of the procinfo list: */ |
438 | static procinfo * procinfo_list; | |
c906108c | 439 | |
c3f6f71d JM |
440 | /* |
441 | * Function: find_procinfo | |
442 | * | |
443 | * Search the procinfo list. | |
444 | * | |
445 | * Returns: pointer to procinfo, or NULL if not found. | |
446 | */ | |
c906108c | 447 | |
19958708 | 448 | static procinfo * |
fba45db2 | 449 | find_procinfo (int pid, int tid) |
c5aa993b | 450 | { |
c3f6f71d | 451 | procinfo *pi; |
c906108c | 452 | |
c3f6f71d JM |
453 | for (pi = procinfo_list; pi; pi = pi->next) |
454 | if (pi->pid == pid) | |
455 | break; | |
c906108c | 456 | |
c3f6f71d JM |
457 | if (pi) |
458 | if (tid) | |
459 | { | |
460 | /* Don't check threads_valid. If we're updating the | |
461 | thread_list, we want to find whatever threads are already | |
462 | here. This means that in general it is the caller's | |
463 | responsibility to check threads_valid and update before | |
464 | calling find_procinfo, if the caller wants to find a new | |
465 | thread. */ | |
466 | ||
467 | for (pi = pi->thread_list; pi; pi = pi->next) | |
468 | if (pi->tid == tid) | |
469 | break; | |
470 | } | |
c906108c | 471 | |
c3f6f71d JM |
472 | return pi; |
473 | } | |
c906108c | 474 | |
c3f6f71d JM |
475 | /* |
476 | * Function: find_procinfo_or_die | |
477 | * | |
478 | * Calls find_procinfo, but errors on failure. | |
479 | */ | |
c906108c | 480 | |
c3f6f71d | 481 | static procinfo * |
fba45db2 | 482 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
483 | { |
484 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 485 | |
c3f6f71d | 486 | if (pi == NULL) |
0fda6bd2 JM |
487 | { |
488 | if (tid) | |
8a3fe4f8 | 489 | error (_("procfs: couldn't find pid %d (kernel thread %d) in procinfo list."), |
0fda6bd2 JM |
490 | pid, tid); |
491 | else | |
8a3fe4f8 | 492 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 493 | } |
c3f6f71d JM |
494 | return pi; |
495 | } | |
c906108c | 496 | |
4d1bcd09 KB |
497 | /* open_with_retry() is a wrapper for open(). The appropriate |
498 | open() call is attempted; if unsuccessful, it will be retried as | |
499 | many times as needed for the EAGAIN and EINTR conditions. | |
19958708 | 500 | |
4d1bcd09 KB |
501 | For other conditions, open_with_retry() will retry the open() a |
502 | limited number of times. In addition, a short sleep is imposed | |
503 | prior to retrying the open(). The reason for this sleep is to give | |
504 | the kernel a chance to catch up and create the file in question in | |
505 | the event that GDB "wins" the race to open a file before the kernel | |
506 | has created it. */ | |
19958708 | 507 | |
4d1bcd09 KB |
508 | static int |
509 | open_with_retry (const char *pathname, int flags) | |
510 | { | |
511 | int retries_remaining, status; | |
512 | ||
513 | retries_remaining = 2; | |
514 | ||
515 | while (1) | |
516 | { | |
517 | status = open (pathname, flags); | |
518 | ||
519 | if (status >= 0 || retries_remaining == 0) | |
520 | break; | |
521 | else if (errno != EINTR && errno != EAGAIN) | |
522 | { | |
523 | retries_remaining--; | |
524 | sleep (1); | |
525 | } | |
526 | } | |
527 | ||
528 | return status; | |
529 | } | |
530 | ||
c3f6f71d JM |
531 | /* |
532 | * Function: open_procinfo_files | |
533 | * | |
534 | * Open the file descriptor for the process or LWP. | |
535 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
536 | * the others are opened lazily as needed. | |
537 | * else (if not NEW_PROC_API), there is only one real | |
538 | * file descriptor, but we keep multiple copies of it so that | |
539 | * the code that uses them does not have to be #ifdef'd. | |
540 | * | |
541 | * Return: file descriptor, or zero for failure. | |
542 | */ | |
c906108c | 543 | |
c3f6f71d | 544 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 545 | |
c3f6f71d | 546 | static int |
fba45db2 | 547 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 548 | { |
0fda6bd2 | 549 | #ifdef NEW_PROC_API |
c3f6f71d | 550 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 551 | #endif |
c3f6f71d JM |
552 | int fd; |
553 | ||
19958708 | 554 | /* |
c3f6f71d JM |
555 | * This function is getting ALMOST long enough to break up into several. |
556 | * Here is some rationale: | |
557 | * | |
558 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
19958708 | 559 | * There are several file descriptors that may need to be open |
c3f6f71d JM |
560 | * for any given process or LWP. The ones we're intereted in are: |
561 | * - control (ctl) write-only change the state | |
562 | * - status (status) read-only query the state | |
563 | * - address space (as) read/write access memory | |
564 | * - map (map) read-only virtual addr map | |
565 | * Most of these are opened lazily as they are needed. | |
19958708 | 566 | * The pathnames for the 'files' for an LWP look slightly |
c3f6f71d JM |
567 | * different from those of a first-class process: |
568 | * Pathnames for a process (<proc-id>): | |
569 | * /proc/<proc-id>/ctl | |
570 | * /proc/<proc-id>/status | |
571 | * /proc/<proc-id>/as | |
572 | * /proc/<proc-id>/map | |
573 | * Pathnames for an LWP (lwp-id): | |
574 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
575 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
576 | * An LWP has no map or address space file descriptor, since | |
577 | * the memory map and address space are shared by all LWPs. | |
578 | * | |
579 | * Everyone else (Solaris 2.5, Irix, OSF) | |
580 | * There is only one file descriptor for each process or LWP. | |
581 | * For convenience, we copy the same file descriptor into all | |
582 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
583 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
19958708 | 584 | * doesn't need any #ifdef's. |
c3f6f71d JM |
585 | * Pathname for all: |
586 | * /proc/<proc-id> | |
587 | * | |
588 | * Solaris 2.5 LWP's: | |
19958708 | 589 | * Each LWP has an independent file descriptor, but these |
c3f6f71d JM |
590 | * are not obtained via the 'open' system call like the rest: |
591 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
592 | * to the file descriptor of the parent process. | |
593 | * | |
594 | * OSF threads: | |
595 | * These do not even have their own independent file descriptor. | |
596 | * All operations are carried out on the file descriptor of the | |
597 | * parent process. Therefore we just call open again for each | |
598 | * thread, getting a new handle for the same 'file'. | |
599 | */ | |
600 | ||
601 | #ifdef NEW_PROC_API | |
602 | /* | |
603 | * In this case, there are several different file descriptors that | |
604 | * we might be asked to open. The control file descriptor will be | |
605 | * opened early, but the others will be opened lazily as they are | |
606 | * needed. | |
607 | */ | |
608 | ||
609 | strcpy (tmp, pi->pathname); | |
610 | switch (which) { /* which file descriptor to open? */ | |
611 | case FD_CTL: | |
612 | if (pi->tid) | |
613 | strcat (tmp, "/lwpctl"); | |
614 | else | |
615 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 616 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
617 | if (fd <= 0) |
618 | return 0; /* fail */ | |
619 | pi->ctl_fd = fd; | |
620 | break; | |
621 | case FD_AS: | |
622 | if (pi->tid) | |
623 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
624 | strcat (tmp, "/as"); | |
4d1bcd09 | 625 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
626 | if (fd <= 0) |
627 | return 0; /* fail */ | |
628 | pi->as_fd = fd; | |
629 | break; | |
630 | case FD_STATUS: | |
631 | if (pi->tid) | |
632 | strcat (tmp, "/lwpstatus"); | |
633 | else | |
634 | strcat (tmp, "/status"); | |
4d1bcd09 | 635 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
636 | if (fd <= 0) |
637 | return 0; /* fail */ | |
638 | pi->status_fd = fd; | |
639 | break; | |
640 | default: | |
641 | return 0; /* unknown file descriptor */ | |
642 | } | |
643 | #else /* not NEW_PROC_API */ | |
644 | /* | |
645 | * In this case, there is only one file descriptor for each procinfo | |
646 | * (ie. each process or LWP). In fact, only the file descriptor for | |
647 | * the process can actually be opened by an 'open' system call. | |
19958708 RM |
648 | * The ones for the LWPs have to be obtained thru an IOCTL call |
649 | * on the process's file descriptor. | |
c3f6f71d JM |
650 | * |
651 | * For convenience, we copy each procinfo's single file descriptor | |
19958708 | 652 | * into all of the fields occupied by the several file descriptors |
c3f6f71d JM |
653 | * of the NEW_PROC_API implementation. That way, the code that uses |
654 | * them can be written without ifdefs. | |
655 | */ | |
656 | ||
657 | ||
658 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
659 | /* Only one FD; just open it. */ |
660 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
661 | return 0; |
662 | #else /* Sol 2.5, Irix, other? */ | |
663 | if (pi->tid == 0) /* Master procinfo for the process */ | |
664 | { | |
4d1bcd09 | 665 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
666 | if (fd <= 0) |
667 | return 0; /* fail */ | |
668 | } | |
669 | else /* LWP thread procinfo */ | |
670 | { | |
671 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
672 | procinfo *process; | |
673 | int lwpid = pi->tid; | |
674 | ||
675 | /* Find the procinfo for the entire process. */ | |
676 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
677 | return 0; /* fail */ | |
678 | ||
679 | /* Now obtain the file descriptor for the LWP. */ | |
680 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
681 | return 0; /* fail */ | |
682 | #else /* Irix, other? */ | |
683 | return 0; /* Don't know how to open threads */ | |
684 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
685 | } | |
686 | #endif /* OSF PIOCTSTATUS */ | |
687 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
688 | #endif /* NEW_PROC_API */ | |
c906108c | 689 | |
c3f6f71d JM |
690 | return 1; /* success */ |
691 | } | |
c906108c | 692 | |
c3f6f71d JM |
693 | /* |
694 | * Function: create_procinfo | |
695 | * | |
696 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 697 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
698 | * |
699 | * Return: pointer to new procinfo struct. | |
700 | */ | |
c906108c | 701 | |
c3f6f71d | 702 | static procinfo * |
fba45db2 | 703 | create_procinfo (int pid, int tid) |
c3f6f71d | 704 | { |
0b62613e | 705 | procinfo *pi, *parent = NULL; |
c906108c | 706 | |
0d06e24b | 707 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 708 | return pi; /* Already exists, nothing to do. */ |
c906108c | 709 | |
c3f6f71d JM |
710 | /* find parent before doing malloc, to save having to cleanup */ |
711 | if (tid != 0) | |
712 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
713 | create it if it | |
714 | doesn't exist yet? */ | |
c906108c | 715 | |
c3f6f71d JM |
716 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
717 | memset (pi, 0, sizeof (procinfo)); | |
718 | pi->pid = pid; | |
719 | pi->tid = tid; | |
c906108c | 720 | |
37de36c6 KB |
721 | #ifdef DYNAMIC_SYSCALLS |
722 | load_syscalls (pi); | |
723 | #endif | |
724 | ||
1d5e0602 KB |
725 | pi->saved_entryset = sysset_t_alloc (pi); |
726 | pi->saved_exitset = sysset_t_alloc (pi); | |
727 | ||
c3f6f71d JM |
728 | /* Chain into list. */ |
729 | if (tid == 0) | |
730 | { | |
731 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
732 | pi->next = procinfo_list; | |
733 | procinfo_list = pi; | |
734 | } | |
735 | else | |
736 | { | |
737 | #ifdef NEW_PROC_API | |
738 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
739 | #else | |
740 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
741 | #endif | |
742 | pi->next = parent->thread_list; | |
743 | parent->thread_list = pi; | |
744 | } | |
745 | return pi; | |
746 | } | |
c906108c | 747 | |
c3f6f71d JM |
748 | /* |
749 | * Function: close_procinfo_files | |
750 | * | |
751 | * Close all file descriptors associated with the procinfo | |
752 | */ | |
c906108c | 753 | |
c3f6f71d | 754 | static void |
fba45db2 | 755 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
756 | { |
757 | if (pi->ctl_fd > 0) | |
758 | close (pi->ctl_fd); | |
759 | #ifdef NEW_PROC_API | |
760 | if (pi->as_fd > 0) | |
761 | close (pi->as_fd); | |
762 | if (pi->status_fd > 0) | |
763 | close (pi->status_fd); | |
764 | #endif | |
765 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
766 | } | |
c906108c | 767 | |
c3f6f71d JM |
768 | /* |
769 | * Function: destroy_procinfo | |
770 | * | |
771 | * Destructor function. Close, unlink and deallocate the object. | |
772 | */ | |
c906108c | 773 | |
c3f6f71d | 774 | static void |
fba45db2 | 775 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
776 | { |
777 | procinfo *ptr; | |
778 | ||
779 | /* Step one: unlink the procinfo from its list */ | |
780 | if (pi == *list) | |
781 | *list = pi->next; | |
19958708 | 782 | else |
c3f6f71d JM |
783 | for (ptr = *list; ptr; ptr = ptr->next) |
784 | if (ptr->next == pi) | |
785 | { | |
786 | ptr->next = pi->next; | |
787 | break; | |
788 | } | |
7a292a7a | 789 | |
c3f6f71d JM |
790 | /* Step two: close any open file descriptors */ |
791 | close_procinfo_files (pi); | |
7a292a7a | 792 | |
c3f6f71d | 793 | /* Step three: free the memory. */ |
37de36c6 KB |
794 | #ifdef DYNAMIC_SYSCALLS |
795 | free_syscalls (pi); | |
796 | #endif | |
1d5e0602 KB |
797 | xfree (pi->saved_entryset); |
798 | xfree (pi->saved_exitset); | |
b8c9b27d | 799 | xfree (pi); |
c3f6f71d | 800 | } |
c906108c | 801 | |
c3f6f71d | 802 | static void |
fba45db2 | 803 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
804 | { |
805 | procinfo *tmp; | |
c906108c | 806 | |
c3f6f71d JM |
807 | if (pi->tid != 0) /* destroy a thread procinfo */ |
808 | { | |
809 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
810 | destroy_one_procinfo (&tmp->thread_list, pi); | |
811 | } | |
812 | else /* destroy a process procinfo and all its threads */ | |
813 | { | |
814 | /* First destroy the children, if any; */ | |
815 | while (pi->thread_list != NULL) | |
816 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
817 | /* Then destroy the parent. Genocide!!! */ | |
818 | destroy_one_procinfo (&procinfo_list, pi); | |
819 | } | |
820 | } | |
c906108c | 821 | |
004527cb AC |
822 | static void |
823 | do_destroy_procinfo_cleanup (void *pi) | |
824 | { | |
825 | destroy_procinfo (pi); | |
826 | } | |
827 | ||
c3f6f71d | 828 | enum { NOKILL, KILL }; |
c906108c | 829 | |
c3f6f71d JM |
830 | /* |
831 | * Function: dead_procinfo | |
832 | * | |
833 | * To be called on a non_recoverable error for a procinfo. | |
834 | * Prints error messages, optionally sends a SIGKILL to the process, | |
835 | * then destroys the data structure. | |
836 | */ | |
c906108c | 837 | |
c3f6f71d | 838 | static void |
fba45db2 | 839 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
840 | { |
841 | char procfile[80]; | |
c906108c | 842 | |
c3f6f71d JM |
843 | if (pi->pathname) |
844 | { | |
845 | print_sys_errmsg (pi->pathname, errno); | |
846 | } | |
847 | else | |
848 | { | |
849 | sprintf (procfile, "process %d", pi->pid); | |
850 | print_sys_errmsg (procfile, errno); | |
851 | } | |
852 | if (kill_p == KILL) | |
853 | kill (pi->pid, SIGKILL); | |
c906108c | 854 | |
c3f6f71d | 855 | destroy_procinfo (pi); |
0b62613e | 856 | error ("%s", msg); |
c3f6f71d | 857 | } |
c906108c | 858 | |
37de36c6 KB |
859 | /* |
860 | * Function: sysset_t_size | |
861 | * | |
862 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
863 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
864 | * size of sysset_t isn't known until runtime. | |
865 | */ | |
866 | ||
867 | static int | |
868 | sysset_t_size (procinfo * pi) | |
869 | { | |
870 | #ifndef DYNAMIC_SYSCALLS | |
871 | return sizeof (sysset_t); | |
872 | #else | |
873 | return sizeof (sysset_t) - sizeof (uint64_t) | |
874 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
875 | / (8 * sizeof (uint64_t))); | |
876 | #endif | |
877 | } | |
878 | ||
879 | /* Function: sysset_t_alloc | |
19958708 | 880 | |
37de36c6 KB |
881 | Allocate and (partially) initialize a sysset_t struct. */ |
882 | ||
883 | static sysset_t * | |
884 | sysset_t_alloc (procinfo * pi) | |
885 | { | |
886 | sysset_t *ret; | |
887 | int size = sysset_t_size (pi); | |
888 | ret = xmalloc (size); | |
889 | #ifdef DYNAMIC_SYSCALLS | |
890 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
891 | / (8 * sizeof (uint64_t)); | |
892 | #endif | |
893 | return ret; | |
894 | } | |
895 | ||
896 | #ifdef DYNAMIC_SYSCALLS | |
897 | ||
898 | /* Function: load_syscalls | |
19958708 | 899 | |
37de36c6 KB |
900 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
901 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
902 | with the names. (Certain numbers may be skipped in which case the | |
903 | names for these numbers will be left as NULL.) */ | |
904 | ||
905 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
906 | #define MAX_SYSCALLS 65536 | |
907 | ||
908 | static void | |
909 | load_syscalls (procinfo *pi) | |
910 | { | |
911 | char pathname[MAX_PROC_NAME_SIZE]; | |
912 | int sysent_fd; | |
913 | prsysent_t header; | |
914 | prsyscall_t *syscalls; | |
915 | int i, size, maxcall; | |
916 | ||
917 | pi->num_syscalls = 0; | |
918 | pi->syscall_names = 0; | |
919 | ||
920 | /* Open the file descriptor for the sysent file */ | |
921 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 922 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
923 | if (sysent_fd < 0) |
924 | { | |
8a3fe4f8 | 925 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
926 | } |
927 | ||
928 | size = sizeof header - sizeof (prsyscall_t); | |
929 | if (read (sysent_fd, &header, size) != size) | |
930 | { | |
8a3fe4f8 | 931 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
932 | } |
933 | ||
934 | if (header.pr_nsyscalls == 0) | |
935 | { | |
8a3fe4f8 | 936 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); |
37de36c6 KB |
937 | } |
938 | ||
939 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
940 | syscalls = xmalloc (size); | |
941 | ||
942 | if (read (sysent_fd, syscalls, size) != size) | |
943 | { | |
944 | xfree (syscalls); | |
8a3fe4f8 | 945 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
946 | } |
947 | ||
948 | /* Find maximum syscall number. This may not be the same as | |
949 | pr_nsyscalls since that value refers to the number of entries | |
950 | in the table. (Also, the docs indicate that some system | |
951 | call numbers may be skipped.) */ | |
952 | ||
953 | maxcall = syscalls[0].pr_number; | |
954 | ||
955 | for (i = 1; i < header.pr_nsyscalls; i++) | |
956 | if (syscalls[i].pr_number > maxcall | |
957 | && syscalls[i].pr_nameoff > 0 | |
958 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
959 | maxcall = syscalls[i].pr_number; | |
960 | ||
961 | pi->num_syscalls = maxcall+1; | |
962 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
963 | ||
964 | for (i = 0; i < pi->num_syscalls; i++) | |
965 | pi->syscall_names[i] = NULL; | |
966 | ||
967 | /* Read the syscall names in */ | |
968 | for (i = 0; i < header.pr_nsyscalls; i++) | |
969 | { | |
970 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
971 | int nread; | |
972 | int callnum; | |
973 | ||
974 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
975 | || syscalls[i].pr_number < 0 | |
976 | || syscalls[i].pr_nameoff <= 0 | |
977 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
978 | != (off_t) syscalls[i].pr_nameoff)) | |
979 | continue; | |
980 | ||
981 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
982 | if (nread <= 0) | |
983 | continue; | |
984 | ||
985 | callnum = syscalls[i].pr_number; | |
986 | ||
987 | if (pi->syscall_names[callnum] != NULL) | |
988 | { | |
989 | /* FIXME: Generate warning */ | |
990 | continue; | |
991 | } | |
992 | ||
993 | namebuf[nread-1] = '\0'; | |
994 | size = strlen (namebuf) + 1; | |
995 | pi->syscall_names[callnum] = xmalloc (size); | |
996 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
997 | pi->syscall_names[callnum][size-1] = '\0'; | |
998 | } | |
19958708 | 999 | |
37de36c6 KB |
1000 | close (sysent_fd); |
1001 | xfree (syscalls); | |
1002 | } | |
1003 | ||
1004 | /* Function: free_syscalls | |
19958708 | 1005 | |
37de36c6 KB |
1006 | Free the space allocated for the syscall names from the procinfo |
1007 | structure. */ | |
1008 | ||
1009 | static void | |
1010 | free_syscalls (procinfo *pi) | |
1011 | { | |
1012 | if (pi->syscall_names) | |
1013 | { | |
1014 | int i; | |
1015 | ||
1016 | for (i = 0; i < pi->num_syscalls; i++) | |
1017 | if (pi->syscall_names[i] != NULL) | |
1018 | xfree (pi->syscall_names[i]); | |
1019 | ||
1020 | xfree (pi->syscall_names); | |
1021 | pi->syscall_names = 0; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | /* Function: find_syscall | |
1026 | ||
1027 | Given a name, look up (and return) the corresponding syscall number. | |
1028 | If no match is found, return -1. */ | |
19958708 | 1029 | |
37de36c6 KB |
1030 | static int |
1031 | find_syscall (procinfo *pi, char *name) | |
1032 | { | |
1033 | int i; | |
1034 | for (i = 0; i < pi->num_syscalls; i++) | |
1035 | { | |
1036 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1037 | return i; | |
1038 | } | |
1039 | return -1; | |
1040 | } | |
1041 | #endif | |
1042 | ||
c3f6f71d | 1043 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1044 | |
c3f6f71d | 1045 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1046 | |
c3f6f71d JM |
1047 | /* |
1048 | * This "module" is the interface layer between the /proc system API | |
19958708 | 1049 | * and the gdb target vector functions. This layer consists of |
c3f6f71d JM |
1050 | * access functions that encapsulate each of the basic operations |
1051 | * that we need to use from the /proc API. | |
1052 | * | |
1053 | * The main motivation for this layer is to hide the fact that | |
1054 | * there are two very different implementations of the /proc API. | |
1055 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1056 | * functions, we do our best to hide them all in here. | |
1057 | */ | |
c906108c | 1058 | |
a14ed312 KB |
1059 | int proc_get_status (procinfo * pi); |
1060 | long proc_flags (procinfo * pi); | |
1061 | int proc_why (procinfo * pi); | |
1062 | int proc_what (procinfo * pi); | |
1063 | int proc_set_run_on_last_close (procinfo * pi); | |
1064 | int proc_unset_run_on_last_close (procinfo * pi); | |
1065 | int proc_set_inherit_on_fork (procinfo * pi); | |
1066 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1067 | int proc_set_async (procinfo * pi); | |
1068 | int proc_unset_async (procinfo * pi); | |
1069 | int proc_stop_process (procinfo * pi); | |
1070 | int proc_trace_signal (procinfo * pi, int signo); | |
1071 | int proc_ignore_signal (procinfo * pi, int signo); | |
1072 | int proc_clear_current_fault (procinfo * pi); | |
1073 | int proc_set_current_signal (procinfo * pi, int signo); | |
1074 | int proc_clear_current_signal (procinfo * pi); | |
1075 | int proc_set_gregs (procinfo * pi); | |
1076 | int proc_set_fpregs (procinfo * pi); | |
1077 | int proc_wait_for_stop (procinfo * pi); | |
1078 | int proc_run_process (procinfo * pi, int step, int signo); | |
1079 | int proc_kill (procinfo * pi, int signo); | |
1080 | int proc_parent_pid (procinfo * pi); | |
1081 | int proc_get_nthreads (procinfo * pi); | |
1082 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1083 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1084 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1085 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1086 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1087 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1088 | |
1089 | int proc_update_threads (procinfo * pi); | |
1090 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1091 | int (*func) (procinfo *, procinfo *, void *), |
1092 | void *ptr); | |
a14ed312 KB |
1093 | |
1094 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1095 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1096 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1097 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1098 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1099 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1100 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1101 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1102 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1103 | |
1104 | void proc_warn (procinfo * pi, char *func, int line); | |
1105 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1106 | |
c3f6f71d | 1107 | void |
fba45db2 | 1108 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1109 | { |
1110 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1111 | print_sys_errmsg (errmsg, errno); | |
1112 | } | |
c906108c | 1113 | |
c3f6f71d | 1114 | void |
fba45db2 | 1115 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1116 | { |
1117 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1118 | perror_with_name (errmsg); | |
1119 | } | |
c906108c | 1120 | |
c3f6f71d JM |
1121 | /* |
1122 | * Function: proc_get_status | |
1123 | * | |
1124 | * Updates the status struct in the procinfo. | |
1125 | * There is a 'valid' flag, to let other functions know when | |
1126 | * this function needs to be called (so the status is only | |
1127 | * read when it is needed). The status file descriptor is | |
1128 | * also only opened when it is needed. | |
1129 | * | |
1130 | * Return: non-zero for success, zero for failure. | |
1131 | */ | |
c906108c | 1132 | |
c3f6f71d | 1133 | int |
fba45db2 | 1134 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1135 | { |
1136 | /* Status file descriptor is opened "lazily" */ | |
1137 | if (pi->status_fd == 0 && | |
1138 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1139 | { | |
1140 | pi->status_valid = 0; | |
1141 | return 0; | |
1142 | } | |
c906108c | 1143 | |
c3f6f71d JM |
1144 | #ifdef NEW_PROC_API |
1145 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1146 | pi->status_valid = 0; /* fail */ | |
1147 | else | |
1148 | { | |
19958708 | 1149 | /* Sigh... I have to read a different data structure, |
c3f6f71d JM |
1150 | depending on whether this is a main process or an LWP. */ |
1151 | if (pi->tid) | |
19958708 RM |
1152 | pi->status_valid = (read (pi->status_fd, |
1153 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1154 | sizeof (lwpstatus_t)) |
1155 | == sizeof (lwpstatus_t)); | |
1156 | else | |
1157 | { | |
19958708 | 1158 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1159 | (char *) &pi->prstatus, |
1160 | sizeof (gdb_prstatus_t)) | |
1161 | == sizeof (gdb_prstatus_t)); | |
1162 | #if 0 /*def UNIXWARE*/ | |
1163 | if (pi->status_valid && | |
1164 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1165 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1166 | /* Unixware peculiarity -- read the damn thing again! */ | |
19958708 | 1167 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1168 | (char *) &pi->prstatus, |
1169 | sizeof (gdb_prstatus_t)) | |
1170 | == sizeof (gdb_prstatus_t)); | |
1171 | #endif /* UNIXWARE */ | |
1172 | } | |
1173 | } | |
1174 | #else /* ioctl method */ | |
1175 | #ifdef PIOCTSTATUS /* osf */ | |
1176 | if (pi->tid == 0) /* main process */ | |
1177 | { | |
1178 | /* Just read the danged status. Now isn't that simple? */ | |
19958708 | 1179 | pi->status_valid = |
c3f6f71d JM |
1180 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1181 | } | |
1182 | else | |
1183 | { | |
1184 | int win; | |
1185 | struct { | |
1186 | long pr_count; | |
1187 | tid_t pr_error_thread; | |
1188 | struct prstatus status; | |
1189 | } thread_status; | |
1190 | ||
1191 | thread_status.pr_count = 1; | |
1192 | thread_status.status.pr_tid = pi->tid; | |
1193 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1194 | if (win) | |
1195 | { | |
19958708 | 1196 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1197 | sizeof (pi->prstatus)); |
1198 | pi->status_valid = 1; | |
1199 | } | |
1200 | } | |
1201 | #else | |
1202 | /* Just read the danged status. Now isn't that simple? */ | |
1203 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1204 | #endif | |
1205 | #endif | |
c906108c | 1206 | |
c3f6f71d JM |
1207 | if (pi->status_valid) |
1208 | { | |
19958708 | 1209 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1210 | proc_why (pi), |
19958708 | 1211 | proc_what (pi), |
c3f6f71d JM |
1212 | proc_get_current_thread (pi)); |
1213 | } | |
c906108c | 1214 | |
c3f6f71d JM |
1215 | /* The status struct includes general regs, so mark them valid too */ |
1216 | pi->gregs_valid = pi->status_valid; | |
1217 | #ifdef NEW_PROC_API | |
19958708 | 1218 | /* In the read/write multiple-fd model, |
c3f6f71d JM |
1219 | the status struct includes the fp regs too, so mark them valid too */ |
1220 | pi->fpregs_valid = pi->status_valid; | |
1221 | #endif | |
1222 | return pi->status_valid; /* True if success, false if failure. */ | |
1223 | } | |
c906108c | 1224 | |
c3f6f71d JM |
1225 | /* |
1226 | * Function: proc_flags | |
1227 | * | |
1228 | * returns the process flags (pr_flags field). | |
19958708 | 1229 | */ |
c3f6f71d JM |
1230 | |
1231 | long | |
fba45db2 | 1232 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1233 | { |
1234 | if (!pi->status_valid) | |
1235 | if (!proc_get_status (pi)) | |
1236 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1237 | |
c3f6f71d | 1238 | #ifdef NEW_PROC_API |
0d06e24b JM |
1239 | # ifdef UNIXWARE |
1240 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1241 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1242 | The two sets of flags don't overlap. */ | |
1243 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1244 | # else | |
c3f6f71d | 1245 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1246 | # endif |
c3f6f71d JM |
1247 | #else |
1248 | return pi->prstatus.pr_flags; | |
1249 | #endif | |
1250 | } | |
c906108c | 1251 | |
c3f6f71d JM |
1252 | /* |
1253 | * Function: proc_why | |
1254 | * | |
1255 | * returns the pr_why field (why the process stopped). | |
1256 | */ | |
c906108c | 1257 | |
c3f6f71d | 1258 | int |
fba45db2 | 1259 | proc_why (procinfo *pi) |
c3f6f71d JM |
1260 | { |
1261 | if (!pi->status_valid) | |
1262 | if (!proc_get_status (pi)) | |
1263 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1264 | |
c3f6f71d JM |
1265 | #ifdef NEW_PROC_API |
1266 | return pi->prstatus.pr_lwp.pr_why; | |
1267 | #else | |
1268 | return pi->prstatus.pr_why; | |
1269 | #endif | |
1270 | } | |
c906108c | 1271 | |
c3f6f71d JM |
1272 | /* |
1273 | * Function: proc_what | |
1274 | * | |
1275 | * returns the pr_what field (details of why the process stopped). | |
1276 | */ | |
c906108c | 1277 | |
c3f6f71d | 1278 | int |
fba45db2 | 1279 | proc_what (procinfo *pi) |
c3f6f71d JM |
1280 | { |
1281 | if (!pi->status_valid) | |
1282 | if (!proc_get_status (pi)) | |
1283 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1284 | |
c3f6f71d JM |
1285 | #ifdef NEW_PROC_API |
1286 | return pi->prstatus.pr_lwp.pr_what; | |
1287 | #else | |
1288 | return pi->prstatus.pr_what; | |
c906108c | 1289 | #endif |
c3f6f71d | 1290 | } |
c906108c | 1291 | |
c3f6f71d JM |
1292 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1293 | /* | |
1294 | * Function: proc_nsysarg | |
1295 | * | |
1296 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1297 | */ | |
1298 | ||
1299 | int | |
fba45db2 | 1300 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1301 | { |
1302 | if (!pi->status_valid) | |
1303 | if (!proc_get_status (pi)) | |
1304 | return 0; | |
19958708 | 1305 | |
c3f6f71d JM |
1306 | #ifdef NEW_PROC_API |
1307 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1308 | #else | |
1309 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1310 | #endif |
c3f6f71d | 1311 | } |
c906108c | 1312 | |
c3f6f71d JM |
1313 | /* |
1314 | * Function: proc_sysargs | |
1315 | * | |
1316 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1317 | */ | |
c906108c | 1318 | |
c3f6f71d | 1319 | long * |
fba45db2 | 1320 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1321 | { |
1322 | if (!pi->status_valid) | |
1323 | if (!proc_get_status (pi)) | |
1324 | return NULL; | |
19958708 | 1325 | |
c3f6f71d JM |
1326 | #ifdef NEW_PROC_API |
1327 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1328 | #else | |
1329 | return (long *) &pi->prstatus.pr_sysarg; | |
1330 | #endif | |
1331 | } | |
c906108c | 1332 | |
c3f6f71d JM |
1333 | /* |
1334 | * Function: proc_syscall | |
1335 | * | |
1336 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1337 | */ | |
c906108c | 1338 | |
c3f6f71d | 1339 | int |
fba45db2 | 1340 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1341 | { |
1342 | if (!pi->status_valid) | |
1343 | if (!proc_get_status (pi)) | |
1344 | return 0; | |
19958708 | 1345 | |
c3f6f71d JM |
1346 | #ifdef NEW_PROC_API |
1347 | return pi->prstatus.pr_lwp.pr_syscall; | |
1348 | #else | |
1349 | return pi->prstatus.pr_syscall; | |
1350 | #endif | |
1351 | } | |
1352 | #endif /* PIOCSSPCACT */ | |
c906108c | 1353 | |
c3f6f71d JM |
1354 | /* |
1355 | * Function: proc_cursig: | |
1356 | * | |
1357 | * returns the pr_cursig field (current signal). | |
1358 | */ | |
c906108c | 1359 | |
c3f6f71d JM |
1360 | long |
1361 | proc_cursig (struct procinfo *pi) | |
1362 | { | |
1363 | if (!pi->status_valid) | |
1364 | if (!proc_get_status (pi)) | |
1365 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1366 | |
c3f6f71d JM |
1367 | #ifdef NEW_PROC_API |
1368 | return pi->prstatus.pr_lwp.pr_cursig; | |
1369 | #else | |
1370 | return pi->prstatus.pr_cursig; | |
1371 | #endif | |
1372 | } | |
c906108c | 1373 | |
c3f6f71d | 1374 | /* |
19958708 | 1375 | * Function: proc_modify_flag |
c3f6f71d | 1376 | * |
19958708 | 1377 | * === I appologize for the messiness of this function. |
c3f6f71d JM |
1378 | * === This is an area where the different versions of |
1379 | * === /proc are more inconsistent than usual. MVS | |
1380 | * | |
1381 | * Set or reset any of the following process flags: | |
1382 | * PR_FORK -- forked child will inherit trace flags | |
1383 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1384 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1385 | * PR_ASYNC -- LWP's get to run/stop independently. |
1386 | * | |
1387 | * There are three methods for doing this function: | |
1388 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1389 | * [Sol6, Sol7, UW] | |
1390 | * 2) Middle: PIOCSET/PIOCRESET | |
1391 | * [Irix, Sol5] | |
1392 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1393 | * [OSF, Sol5] | |
1394 | * | |
1395 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1396 | * Note: OSF does not define PR_KLC. |
1397 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d | 1398 | * |
19958708 | 1399 | * Arguments: |
c3f6f71d JM |
1400 | * pi -- the procinfo |
1401 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1402 | * mode -- 1 for set, 0 for reset. | |
1403 | * | |
1404 | * Returns non-zero for success, zero for failure. | |
1405 | */ | |
c906108c | 1406 | |
c3f6f71d | 1407 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1408 | |
c3f6f71d | 1409 | static int |
fba45db2 | 1410 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1411 | { |
1412 | long win = 0; /* default to fail */ | |
1413 | ||
19958708 RM |
1414 | /* |
1415 | * These operations affect the process as a whole, and applying | |
1416 | * them to an individual LWP has the same meaning as applying them | |
1417 | * to the main process. Therefore, if we're ever called with a | |
1418 | * pointer to an LWP's procinfo, let's substitute the process's | |
1419 | * procinfo and avoid opening the LWP's file descriptor | |
1420 | * unnecessarily. | |
c3f6f71d JM |
1421 | */ |
1422 | ||
1423 | if (pi->pid != 0) | |
1424 | pi = find_procinfo_or_die (pi->pid, 0); | |
1425 | ||
1426 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
19958708 | 1427 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1428 | (which for no obvious reason has a different definition |
1429 | from one operating system to the next...) */ | |
1430 | #ifdef PCUNSET | |
1431 | #define GDBRESET PCUNSET | |
37de36c6 | 1432 | #else |
c3f6f71d JM |
1433 | #ifdef PCRESET |
1434 | #define GDBRESET PCRESET | |
37de36c6 | 1435 | #endif |
c906108c | 1436 | #endif |
c3f6f71d | 1437 | { |
37de36c6 | 1438 | procfs_ctl_t arg[2]; |
c906108c | 1439 | |
c3f6f71d JM |
1440 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1441 | arg[0] = PCSET; | |
1442 | else /* Reset the flag */ | |
1443 | arg[0] = GDBRESET; | |
c5aa993b | 1444 | |
c3f6f71d JM |
1445 | arg[1] = flag; |
1446 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1447 | } | |
1448 | #else | |
1449 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1450 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1451 | { | |
1452 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1453 | } | |
1454 | else /* Reset the flag */ | |
1455 | { | |
1456 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1457 | } | |
c906108c | 1458 | |
c3f6f71d JM |
1459 | #else |
1460 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1461 | switch (flag) { | |
1462 | case PR_RLC: | |
1463 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1464 | { | |
1465 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1466 | } | |
1467 | else /* Clear run-on-last-close */ | |
1468 | { | |
1469 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1470 | } | |
1471 | break; | |
1472 | case PR_FORK: | |
1473 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1474 | { | |
1475 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1476 | } | |
1477 | else /* Clear inherit-on-fork */ | |
1478 | { | |
1479 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1480 | } | |
1481 | break; | |
1482 | default: | |
1483 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1484 | break; | |
1485 | } | |
1486 | #endif | |
1487 | #endif | |
1488 | #endif | |
1489 | #undef GDBRESET | |
1490 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1491 | pi->status_valid = 0; | |
c906108c | 1492 | |
c3f6f71d | 1493 | if (!win) |
8a3fe4f8 | 1494 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1495 | flag == PR_FORK ? "PR_FORK" : |
1496 | flag == PR_RLC ? "PR_RLC" : | |
1497 | #ifdef PR_ASYNC | |
1498 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1499 | #endif |
1500 | #ifdef PR_KLC | |
1501 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1502 | #endif |
1503 | "<unknown flag>", | |
1504 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1505 | |
c3f6f71d JM |
1506 | return win; |
1507 | } | |
c906108c | 1508 | |
c3f6f71d JM |
1509 | /* |
1510 | * Function: proc_set_run_on_last_close | |
1511 | * | |
1512 | * Set the run_on_last_close flag. | |
1513 | * Process with all threads will become runnable | |
1514 | * when debugger closes all /proc fds. | |
1515 | * | |
1516 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1517 | */ |
1518 | ||
c3f6f71d | 1519 | int |
fba45db2 | 1520 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1521 | { |
c3f6f71d JM |
1522 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1523 | } | |
c906108c | 1524 | |
c3f6f71d JM |
1525 | /* |
1526 | * Function: proc_unset_run_on_last_close | |
1527 | * | |
1528 | * Reset the run_on_last_close flag. | |
1529 | * Process will NOT become runnable | |
1530 | * when debugger closes its file handles. | |
1531 | * | |
1532 | * Returns non-zero for success, zero for failure. | |
1533 | */ | |
c906108c | 1534 | |
c3f6f71d | 1535 | int |
fba45db2 | 1536 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1537 | { |
1538 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1539 | } |
1540 | ||
0d06e24b JM |
1541 | #ifdef PR_KLC |
1542 | /* | |
1543 | * Function: proc_set_kill_on_last_close | |
1544 | * | |
1545 | * Set the kill_on_last_close flag. | |
1546 | * Process with all threads will be killed when debugger | |
1547 | * closes all /proc fds (or debugger exits or dies). | |
1548 | * | |
1549 | * Returns non-zero for success, zero for failure. | |
1550 | */ | |
1551 | ||
1552 | int | |
fba45db2 | 1553 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1554 | { |
1555 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1556 | } | |
1557 | ||
1558 | /* | |
1559 | * Function: proc_unset_kill_on_last_close | |
1560 | * | |
1561 | * Reset the kill_on_last_close flag. | |
19958708 | 1562 | * Process will NOT be killed when debugger |
0d06e24b JM |
1563 | * closes its file handles (or exits or dies). |
1564 | * | |
1565 | * Returns non-zero for success, zero for failure. | |
1566 | */ | |
1567 | ||
1568 | int | |
fba45db2 | 1569 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1570 | { |
1571 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1572 | } | |
1573 | #endif /* PR_KLC */ | |
1574 | ||
c906108c | 1575 | /* |
c3f6f71d JM |
1576 | * Function: proc_set_inherit_on_fork |
1577 | * | |
1578 | * Set inherit_on_fork flag. | |
1579 | * If the process forks a child while we are registered for events | |
1580 | * in the parent, then we will also recieve events from the child. | |
1581 | * | |
1582 | * Returns non-zero for success, zero for failure. | |
1583 | */ | |
c906108c | 1584 | |
c3f6f71d | 1585 | int |
fba45db2 | 1586 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1587 | { |
1588 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1589 | } | |
c5aa993b | 1590 | |
c3f6f71d JM |
1591 | /* |
1592 | * Function: proc_unset_inherit_on_fork | |
1593 | * | |
1594 | * Reset inherit_on_fork flag. | |
1595 | * If the process forks a child while we are registered for events | |
1596 | * in the parent, then we will NOT recieve events from the child. | |
1597 | * | |
1598 | * Returns non-zero for success, zero for failure. | |
1599 | */ | |
c906108c | 1600 | |
c3f6f71d | 1601 | int |
fba45db2 | 1602 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1603 | { |
1604 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1605 | } | |
c906108c | 1606 | |
c3f6f71d JM |
1607 | #ifdef PR_ASYNC |
1608 | /* | |
1609 | * Function: proc_set_async | |
1610 | * | |
1611 | * Set PR_ASYNC flag. | |
19958708 | 1612 | * If one LWP stops because of a debug event (signal etc.), |
c3f6f71d JM |
1613 | * the remaining LWPs will continue to run. |
1614 | * | |
1615 | * Returns non-zero for success, zero for failure. | |
1616 | */ | |
c906108c | 1617 | |
c3f6f71d | 1618 | int |
fba45db2 | 1619 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1620 | { |
1621 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1622 | } | |
c906108c | 1623 | |
c3f6f71d JM |
1624 | /* |
1625 | * Function: proc_unset_async | |
1626 | * | |
1627 | * Reset PR_ASYNC flag. | |
1628 | * If one LWP stops because of a debug event (signal etc.), | |
1629 | * then all other LWPs will stop as well. | |
1630 | * | |
1631 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1632 | */ |
1633 | ||
c3f6f71d | 1634 | int |
fba45db2 | 1635 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1636 | { |
1637 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1638 | } | |
1639 | #endif /* PR_ASYNC */ | |
c906108c SS |
1640 | |
1641 | /* | |
c3f6f71d JM |
1642 | * Function: proc_stop_process |
1643 | * | |
1644 | * Request the process/LWP to stop. Does not wait. | |
19958708 | 1645 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1646 | */ |
c906108c | 1647 | |
c3f6f71d | 1648 | int |
fba45db2 | 1649 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1650 | { |
1651 | int win; | |
c906108c | 1652 | |
c3f6f71d JM |
1653 | /* |
1654 | * We might conceivably apply this operation to an LWP, and | |
1655 | * the LWP's ctl file descriptor might not be open. | |
1656 | */ | |
c906108c | 1657 | |
c3f6f71d JM |
1658 | if (pi->ctl_fd == 0 && |
1659 | open_procinfo_files (pi, FD_CTL) == 0) | |
1660 | return 0; | |
1661 | else | |
1662 | { | |
1663 | #ifdef NEW_PROC_API | |
37de36c6 | 1664 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1665 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1666 | #else /* ioctl method */ | |
1667 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1668 | /* Note: the call also reads the prstatus. */ | |
1669 | if (win) | |
1670 | { | |
1671 | pi->status_valid = 1; | |
19958708 | 1672 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1673 | proc_why (pi), |
19958708 | 1674 | proc_what (pi), |
c3f6f71d JM |
1675 | proc_get_current_thread (pi)); |
1676 | } | |
1677 | #endif | |
1678 | } | |
c906108c | 1679 | |
c3f6f71d JM |
1680 | return win; |
1681 | } | |
c5aa993b | 1682 | |
c3f6f71d JM |
1683 | /* |
1684 | * Function: proc_wait_for_stop | |
1685 | * | |
1686 | * Wait for the process or LWP to stop (block until it does). | |
19958708 | 1687 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1688 | */ |
1689 | ||
c3f6f71d | 1690 | int |
fba45db2 | 1691 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1692 | { |
c3f6f71d JM |
1693 | int win; |
1694 | ||
1695 | /* | |
1696 | * We should never have to apply this operation to any procinfo | |
1697 | * except the one for the main process. If that ever changes | |
19958708 | 1698 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1699 | * replace it with one that makes sure the ctl_fd is open. |
1700 | */ | |
19958708 | 1701 | |
c3f6f71d JM |
1702 | if (pi->tid != 0) |
1703 | pi = find_procinfo_or_die (pi->pid, 0); | |
1704 | ||
1705 | #ifdef NEW_PROC_API | |
1706 | { | |
37de36c6 | 1707 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1708 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1709 | /* We been runnin' and we stopped -- need to update status. */ | |
1710 | pi->status_valid = 0; | |
1711 | } | |
1712 | #else /* ioctl method */ | |
1713 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1714 | /* Above call also refreshes the prstatus. */ | |
1715 | if (win) | |
1716 | { | |
1717 | pi->status_valid = 1; | |
19958708 | 1718 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1719 | proc_why (pi), |
19958708 | 1720 | proc_what (pi), |
c3f6f71d JM |
1721 | proc_get_current_thread (pi)); |
1722 | } | |
c906108c SS |
1723 | #endif |
1724 | ||
c3f6f71d | 1725 | return win; |
c906108c SS |
1726 | } |
1727 | ||
1728 | /* | |
c3f6f71d JM |
1729 | * Function: proc_run_process |
1730 | * | |
1731 | * Make the process or LWP runnable. | |
1732 | * Options (not all are implemented): | |
1733 | * - single-step | |
1734 | * - clear current fault | |
1735 | * - clear current signal | |
1736 | * - abort the current system call | |
1737 | * - stop as soon as finished with system call | |
1738 | * - (ioctl): set traced signal set | |
1739 | * - (ioctl): set held signal set | |
1740 | * - (ioctl): set traced fault set | |
1741 | * - (ioctl): set start pc (vaddr) | |
1742 | * Always clear the current fault. | |
1743 | * Clear the current signal if 'signo' is zero. | |
1744 | * | |
1745 | * Arguments: | |
1746 | * pi the process or LWP to operate on. | |
1747 | * step if true, set the process or LWP to trap after one instr. | |
1748 | * signo if zero, clear the current signal if any. | |
1749 | * if non-zero, set the current signal to this one. | |
1750 | * | |
19958708 | 1751 | * Returns non-zero for success, zero for failure. |
c3f6f71d JM |
1752 | */ |
1753 | ||
1754 | int | |
fba45db2 | 1755 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1756 | { |
1757 | int win; | |
1758 | int runflags; | |
1759 | ||
1760 | /* | |
1761 | * We will probably have to apply this operation to individual threads, | |
1762 | * so make sure the control file descriptor is open. | |
1763 | */ | |
19958708 | 1764 | |
c3f6f71d JM |
1765 | if (pi->ctl_fd == 0 && |
1766 | open_procinfo_files (pi, FD_CTL) == 0) | |
1767 | { | |
1768 | return 0; | |
1769 | } | |
c906108c | 1770 | |
c3f6f71d JM |
1771 | runflags = PRCFAULT; /* always clear current fault */ |
1772 | if (step) | |
1773 | runflags |= PRSTEP; | |
1774 | if (signo == 0) | |
1775 | runflags |= PRCSIG; | |
1776 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1777 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1778 | |
c3f6f71d JM |
1779 | #ifdef NEW_PROC_API |
1780 | { | |
37de36c6 | 1781 | procfs_ctl_t cmd[2]; |
c906108c | 1782 | |
c3f6f71d JM |
1783 | cmd[0] = PCRUN; |
1784 | cmd[1] = runflags; | |
1785 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1786 | } | |
1787 | #else /* ioctl method */ | |
1788 | { | |
1789 | prrun_t prrun; | |
c906108c | 1790 | |
c3f6f71d JM |
1791 | memset (&prrun, 0, sizeof (prrun)); |
1792 | prrun.pr_flags = runflags; | |
1793 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1794 | } | |
1795 | #endif | |
c906108c | 1796 | |
c3f6f71d JM |
1797 | return win; |
1798 | } | |
c906108c | 1799 | |
c3f6f71d JM |
1800 | /* |
1801 | * Function: proc_set_traced_signals | |
1802 | * | |
1803 | * Register to trace signals in the process or LWP. | |
19958708 | 1804 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1805 | */ |
1806 | ||
c3f6f71d | 1807 | int |
37de36c6 | 1808 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1809 | { |
c3f6f71d JM |
1810 | int win; |
1811 | ||
1812 | /* | |
1813 | * We should never have to apply this operation to any procinfo | |
1814 | * except the one for the main process. If that ever changes | |
19958708 | 1815 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1816 | * replace it with one that makes sure the ctl_fd is open. |
1817 | */ | |
19958708 | 1818 | |
c3f6f71d JM |
1819 | if (pi->tid != 0) |
1820 | pi = find_procinfo_or_die (pi->pid, 0); | |
1821 | ||
1822 | #ifdef NEW_PROC_API | |
1823 | { | |
1824 | struct { | |
37de36c6 | 1825 | procfs_ctl_t cmd; |
c3f6f71d | 1826 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1827 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1828 | } arg; |
c906108c | 1829 | |
c3f6f71d | 1830 | arg.cmd = PCSTRACE; |
37de36c6 | 1831 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1832 | |
c3f6f71d JM |
1833 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1834 | } | |
1835 | #else /* ioctl method */ | |
1836 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1837 | #endif | |
1838 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1839 | pi->status_valid = 0; | |
c906108c | 1840 | |
c3f6f71d | 1841 | if (!win) |
8a3fe4f8 | 1842 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1843 | return win; |
c906108c SS |
1844 | } |
1845 | ||
1846 | /* | |
c3f6f71d JM |
1847 | * Function: proc_set_traced_faults |
1848 | * | |
1849 | * Register to trace hardware faults in the process or LWP. | |
19958708 | 1850 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1851 | */ |
c906108c | 1852 | |
c3f6f71d | 1853 | int |
fba45db2 | 1854 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1855 | { |
1856 | int win; | |
1857 | ||
1858 | /* | |
1859 | * We should never have to apply this operation to any procinfo | |
1860 | * except the one for the main process. If that ever changes | |
19958708 | 1861 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1862 | * replace it with one that makes sure the ctl_fd is open. |
1863 | */ | |
19958708 | 1864 | |
c3f6f71d JM |
1865 | if (pi->tid != 0) |
1866 | pi = find_procinfo_or_die (pi->pid, 0); | |
1867 | ||
1868 | #ifdef NEW_PROC_API | |
1869 | { | |
1870 | struct { | |
37de36c6 | 1871 | procfs_ctl_t cmd; |
c3f6f71d JM |
1872 | /* Use char array to avoid alignment issues. */ |
1873 | char fltset[sizeof (fltset_t)]; | |
1874 | } arg; | |
c906108c | 1875 | |
c3f6f71d JM |
1876 | arg.cmd = PCSFAULT; |
1877 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1878 | |
c3f6f71d JM |
1879 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1880 | } | |
1881 | #else /* ioctl method */ | |
1882 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1883 | #endif | |
1884 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1885 | pi->status_valid = 0; | |
c906108c | 1886 | |
c3f6f71d JM |
1887 | return win; |
1888 | } | |
c5aa993b | 1889 | |
c3f6f71d JM |
1890 | /* |
1891 | * Function: proc_set_traced_sysentry | |
1892 | * | |
1893 | * Register to trace entry to system calls in the process or LWP. | |
19958708 | 1894 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1895 | */ |
1896 | ||
c3f6f71d | 1897 | int |
fba45db2 | 1898 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1899 | { |
c3f6f71d JM |
1900 | int win; |
1901 | ||
1902 | /* | |
1903 | * We should never have to apply this operation to any procinfo | |
1904 | * except the one for the main process. If that ever changes | |
19958708 | 1905 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1906 | * replace it with one that makes sure the ctl_fd is open. |
1907 | */ | |
19958708 | 1908 | |
c3f6f71d JM |
1909 | if (pi->tid != 0) |
1910 | pi = find_procinfo_or_die (pi->pid, 0); | |
1911 | ||
1912 | #ifdef NEW_PROC_API | |
1913 | { | |
37de36c6 KB |
1914 | struct gdb_proc_ctl_pcsentry { |
1915 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1916 | /* Use char array to avoid alignment issues. */ |
1917 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1918 | } *argp; |
1919 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1920 | - sizeof (sysset_t) | |
1921 | + sysset_t_size (pi); | |
c3f6f71d | 1922 | |
37de36c6 | 1923 | argp = xmalloc (argp_size); |
c3f6f71d | 1924 | |
37de36c6 KB |
1925 | argp->cmd = PCSENTRY; |
1926 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1927 | ||
1928 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1929 | xfree (argp); | |
c3f6f71d JM |
1930 | } |
1931 | #else /* ioctl method */ | |
1932 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1933 | #endif | |
1934 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1935 | pi->status_valid = 0; | |
19958708 | 1936 | |
c3f6f71d | 1937 | return win; |
c906108c SS |
1938 | } |
1939 | ||
1940 | /* | |
c3f6f71d JM |
1941 | * Function: proc_set_traced_sysexit |
1942 | * | |
1943 | * Register to trace exit from system calls in the process or LWP. | |
19958708 | 1944 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1945 | */ |
c906108c | 1946 | |
c3f6f71d | 1947 | int |
fba45db2 | 1948 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1949 | { |
1950 | int win; | |
1951 | ||
1952 | /* | |
1953 | * We should never have to apply this operation to any procinfo | |
1954 | * except the one for the main process. If that ever changes | |
19958708 | 1955 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1956 | * replace it with one that makes sure the ctl_fd is open. |
1957 | */ | |
19958708 | 1958 | |
c3f6f71d JM |
1959 | if (pi->tid != 0) |
1960 | pi = find_procinfo_or_die (pi->pid, 0); | |
1961 | ||
1962 | #ifdef NEW_PROC_API | |
1963 | { | |
37de36c6 KB |
1964 | struct gdb_proc_ctl_pcsexit { |
1965 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1966 | /* Use char array to avoid alignment issues. */ |
1967 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1968 | } *argp; |
1969 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1970 | - sizeof (sysset_t) | |
1971 | + sysset_t_size (pi); | |
c906108c | 1972 | |
37de36c6 | 1973 | argp = xmalloc (argp_size); |
c906108c | 1974 | |
37de36c6 KB |
1975 | argp->cmd = PCSEXIT; |
1976 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1977 | ||
1978 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1979 | xfree (argp); | |
c3f6f71d JM |
1980 | } |
1981 | #else /* ioctl method */ | |
1982 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1983 | #endif | |
1984 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1985 | pi->status_valid = 0; | |
c906108c | 1986 | |
c3f6f71d JM |
1987 | return win; |
1988 | } | |
c906108c | 1989 | |
c3f6f71d JM |
1990 | /* |
1991 | * Function: proc_set_held_signals | |
1992 | * | |
1993 | * Specify the set of blocked / held signals in the process or LWP. | |
19958708 | 1994 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1995 | */ |
1996 | ||
c3f6f71d | 1997 | int |
37de36c6 | 1998 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1999 | { |
c3f6f71d JM |
2000 | int win; |
2001 | ||
2002 | /* | |
2003 | * We should never have to apply this operation to any procinfo | |
2004 | * except the one for the main process. If that ever changes | |
19958708 | 2005 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2006 | * replace it with one that makes sure the ctl_fd is open. |
2007 | */ | |
19958708 | 2008 | |
c3f6f71d JM |
2009 | if (pi->tid != 0) |
2010 | pi = find_procinfo_or_die (pi->pid, 0); | |
2011 | ||
2012 | #ifdef NEW_PROC_API | |
2013 | { | |
2014 | struct { | |
37de36c6 | 2015 | procfs_ctl_t cmd; |
c3f6f71d | 2016 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2017 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
2018 | } arg; |
2019 | ||
2020 | arg.cmd = PCSHOLD; | |
37de36c6 | 2021 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2022 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
2023 | } | |
c906108c | 2024 | #else |
c3f6f71d | 2025 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 2026 | #endif |
c3f6f71d JM |
2027 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
2028 | pi->status_valid = 0; | |
2029 | ||
2030 | return win; | |
c906108c SS |
2031 | } |
2032 | ||
2033 | /* | |
c3f6f71d JM |
2034 | * Function: proc_get_pending_signals |
2035 | * | |
2036 | * returns the set of signals that are pending in the process or LWP. | |
2037 | * Will also copy the sigset if 'save' is non-zero. | |
2038 | */ | |
c906108c | 2039 | |
37de36c6 KB |
2040 | gdb_sigset_t * |
2041 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 2042 | { |
37de36c6 | 2043 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2044 | |
2045 | /* | |
2046 | * We should never have to apply this operation to any procinfo | |
2047 | * except the one for the main process. If that ever changes | |
19958708 | 2048 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2049 | * replace it with one that makes sure the ctl_fd is open. |
2050 | */ | |
19958708 | 2051 | |
c3f6f71d JM |
2052 | if (pi->tid != 0) |
2053 | pi = find_procinfo_or_die (pi->pid, 0); | |
2054 | ||
2055 | if (!pi->status_valid) | |
2056 | if (!proc_get_status (pi)) | |
2057 | return NULL; | |
2058 | ||
2059 | #ifdef NEW_PROC_API | |
2060 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2061 | #else | |
2062 | ret = &pi->prstatus.pr_sigpend; | |
2063 | #endif | |
2064 | if (save && ret) | |
37de36c6 | 2065 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2066 | |
c3f6f71d JM |
2067 | return ret; |
2068 | } | |
c906108c | 2069 | |
c3f6f71d JM |
2070 | /* |
2071 | * Function: proc_get_signal_actions | |
2072 | * | |
2073 | * returns the set of signal actions. | |
2074 | * Will also copy the sigactionset if 'save' is non-zero. | |
2075 | */ | |
c906108c | 2076 | |
37de36c6 KB |
2077 | gdb_sigaction_t * |
2078 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2079 | { |
37de36c6 | 2080 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2081 | |
2082 | /* | |
2083 | * We should never have to apply this operation to any procinfo | |
2084 | * except the one for the main process. If that ever changes | |
19958708 | 2085 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2086 | * replace it with one that makes sure the ctl_fd is open. |
2087 | */ | |
19958708 | 2088 | |
c3f6f71d JM |
2089 | if (pi->tid != 0) |
2090 | pi = find_procinfo_or_die (pi->pid, 0); | |
2091 | ||
2092 | if (!pi->status_valid) | |
2093 | if (!proc_get_status (pi)) | |
2094 | return NULL; | |
2095 | ||
2096 | #ifdef NEW_PROC_API | |
2097 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2098 | #else | |
2099 | ret = &pi->prstatus.pr_action; | |
2100 | #endif | |
2101 | if (save && ret) | |
37de36c6 | 2102 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2103 | |
c3f6f71d JM |
2104 | return ret; |
2105 | } | |
c5aa993b | 2106 | |
c3f6f71d JM |
2107 | /* |
2108 | * Function: proc_get_held_signals | |
2109 | * | |
2110 | * returns the set of signals that are held / blocked. | |
2111 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2112 | */ |
2113 | ||
37de36c6 KB |
2114 | gdb_sigset_t * |
2115 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2116 | { |
37de36c6 | 2117 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2118 | |
2119 | /* | |
2120 | * We should never have to apply this operation to any procinfo | |
2121 | * except the one for the main process. If that ever changes | |
19958708 | 2122 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2123 | * replace it with one that makes sure the ctl_fd is open. |
2124 | */ | |
19958708 | 2125 | |
c3f6f71d JM |
2126 | if (pi->tid != 0) |
2127 | pi = find_procinfo_or_die (pi->pid, 0); | |
2128 | ||
2129 | #ifdef NEW_PROC_API | |
2130 | if (!pi->status_valid) | |
2131 | if (!proc_get_status (pi)) | |
2132 | return NULL; | |
2133 | ||
2134 | #ifdef UNIXWARE | |
2135 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2136 | #else |
c3f6f71d JM |
2137 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2138 | #endif /* UNIXWARE */ | |
2139 | #else /* not NEW_PROC_API */ | |
2140 | { | |
37de36c6 | 2141 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2142 | |
2143 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2144 | ret = &sigheld; | |
2145 | } | |
2146 | #endif /* NEW_PROC_API */ | |
2147 | if (save && ret) | |
37de36c6 | 2148 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2149 | |
2150 | return ret; | |
c906108c SS |
2151 | } |
2152 | ||
c3f6f71d JM |
2153 | /* |
2154 | * Function: proc_get_traced_signals | |
2155 | * | |
2156 | * returns the set of signals that are traced / debugged. | |
2157 | * Will also copy the sigset if 'save' is non-zero. | |
2158 | */ | |
2159 | ||
37de36c6 KB |
2160 | gdb_sigset_t * |
2161 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2162 | { |
37de36c6 | 2163 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2164 | |
2165 | /* | |
2166 | * We should never have to apply this operation to any procinfo | |
2167 | * except the one for the main process. If that ever changes | |
19958708 | 2168 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2169 | * replace it with one that makes sure the ctl_fd is open. |
2170 | */ | |
19958708 | 2171 | |
c3f6f71d JM |
2172 | if (pi->tid != 0) |
2173 | pi = find_procinfo_or_die (pi->pid, 0); | |
2174 | ||
2175 | #ifdef NEW_PROC_API | |
2176 | if (!pi->status_valid) | |
2177 | if (!proc_get_status (pi)) | |
2178 | return NULL; | |
2179 | ||
2180 | ret = &pi->prstatus.pr_sigtrace; | |
2181 | #else | |
2182 | { | |
37de36c6 | 2183 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2184 | |
2185 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2186 | ret = &sigtrace; | |
2187 | } | |
c906108c | 2188 | #endif |
c3f6f71d | 2189 | if (save && ret) |
37de36c6 | 2190 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2191 | |
c3f6f71d JM |
2192 | return ret; |
2193 | } | |
c906108c | 2194 | |
c3f6f71d JM |
2195 | /* |
2196 | * Function: proc_trace_signal | |
2197 | * | |
2198 | * Add 'signo' to the set of signals that are traced. | |
2199 | * Returns non-zero for success, zero for failure. | |
2200 | */ | |
c906108c | 2201 | |
c3f6f71d | 2202 | int |
fba45db2 | 2203 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2204 | { |
37de36c6 | 2205 | gdb_sigset_t temp; |
c3f6f71d JM |
2206 | |
2207 | /* | |
2208 | * We should never have to apply this operation to any procinfo | |
2209 | * except the one for the main process. If that ever changes | |
19958708 | 2210 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2211 | * replace it with one that makes sure the ctl_fd is open. |
2212 | */ | |
19958708 | 2213 | |
c3f6f71d JM |
2214 | if (pi->tid != 0) |
2215 | pi = find_procinfo_or_die (pi->pid, 0); | |
2216 | ||
2217 | if (pi) | |
c906108c | 2218 | { |
c3f6f71d | 2219 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2220 | { |
c3f6f71d JM |
2221 | praddset (&temp, signo); |
2222 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
2223 | } |
2224 | } | |
c5aa993b | 2225 | |
c3f6f71d JM |
2226 | return 0; /* failure */ |
2227 | } | |
c906108c | 2228 | |
c3f6f71d JM |
2229 | /* |
2230 | * Function: proc_ignore_signal | |
2231 | * | |
2232 | * Remove 'signo' from the set of signals that are traced. | |
2233 | * Returns non-zero for success, zero for failure. | |
2234 | */ | |
c906108c | 2235 | |
c3f6f71d | 2236 | int |
fba45db2 | 2237 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2238 | { |
37de36c6 | 2239 | gdb_sigset_t temp; |
c3f6f71d JM |
2240 | |
2241 | /* | |
2242 | * We should never have to apply this operation to any procinfo | |
2243 | * except the one for the main process. If that ever changes | |
19958708 | 2244 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2245 | * replace it with one that makes sure the ctl_fd is open. |
2246 | */ | |
19958708 | 2247 | |
c3f6f71d JM |
2248 | if (pi->tid != 0) |
2249 | pi = find_procinfo_or_die (pi->pid, 0); | |
2250 | ||
2251 | if (pi) | |
c906108c | 2252 | { |
c3f6f71d | 2253 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2254 | { |
c3f6f71d JM |
2255 | prdelset (&temp, signo); |
2256 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 2257 | } |
c906108c | 2258 | } |
c906108c | 2259 | |
c3f6f71d | 2260 | return 0; /* failure */ |
c906108c SS |
2261 | } |
2262 | ||
2263 | /* | |
c3f6f71d JM |
2264 | * Function: proc_get_traced_faults |
2265 | * | |
2266 | * returns the set of hardware faults that are traced /debugged. | |
2267 | * Will also copy the faultset if 'save' is non-zero. | |
2268 | */ | |
2269 | ||
2270 | fltset_t * | |
fba45db2 | 2271 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2272 | { |
2273 | fltset_t *ret = NULL; | |
2274 | ||
2275 | /* | |
2276 | * We should never have to apply this operation to any procinfo | |
2277 | * except the one for the main process. If that ever changes | |
19958708 | 2278 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2279 | * replace it with one that makes sure the ctl_fd is open. |
2280 | */ | |
19958708 | 2281 | |
c3f6f71d JM |
2282 | if (pi->tid != 0) |
2283 | pi = find_procinfo_or_die (pi->pid, 0); | |
2284 | ||
2285 | #ifdef NEW_PROC_API | |
2286 | if (!pi->status_valid) | |
2287 | if (!proc_get_status (pi)) | |
2288 | return NULL; | |
2289 | ||
2290 | ret = &pi->prstatus.pr_flttrace; | |
2291 | #else | |
2292 | { | |
2293 | static fltset_t flttrace; | |
2294 | ||
2295 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2296 | ret = &flttrace; | |
2297 | } | |
2298 | #endif | |
2299 | if (save && ret) | |
2300 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2301 | |
c3f6f71d JM |
2302 | return ret; |
2303 | } | |
c906108c | 2304 | |
c3f6f71d JM |
2305 | /* |
2306 | * Function: proc_get_traced_sysentry | |
2307 | * | |
2308 | * returns the set of syscalls that are traced /debugged on entry. | |
2309 | * Will also copy the syscall set if 'save' is non-zero. | |
2310 | */ | |
c906108c | 2311 | |
c3f6f71d | 2312 | sysset_t * |
fba45db2 | 2313 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2314 | { |
2315 | sysset_t *ret = NULL; | |
2316 | ||
2317 | /* | |
2318 | * We should never have to apply this operation to any procinfo | |
2319 | * except the one for the main process. If that ever changes | |
19958708 | 2320 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2321 | * replace it with one that makes sure the ctl_fd is open. |
2322 | */ | |
19958708 | 2323 | |
c3f6f71d JM |
2324 | if (pi->tid != 0) |
2325 | pi = find_procinfo_or_die (pi->pid, 0); | |
2326 | ||
2327 | #ifdef NEW_PROC_API | |
2328 | if (!pi->status_valid) | |
2329 | if (!proc_get_status (pi)) | |
2330 | return NULL; | |
2331 | ||
37de36c6 | 2332 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2333 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2334 | #else /* DYNAMIC_SYSCALLS */ |
2335 | { | |
2336 | static sysset_t *sysentry; | |
2337 | size_t size; | |
2338 | ||
2339 | if (!sysentry) | |
2340 | sysentry = sysset_t_alloc (pi); | |
2341 | ret = sysentry; | |
2342 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2343 | return NULL; | |
2344 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2345 | { | |
2346 | gdb_premptysysset (sysentry); | |
2347 | } | |
2348 | else | |
2349 | { | |
2350 | int rsize; | |
2351 | ||
2352 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2353 | SEEK_SET) | |
2354 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2355 | return NULL; | |
2356 | size = sysset_t_size (pi); | |
2357 | gdb_premptysysset (sysentry); | |
2358 | rsize = read (pi->status_fd, sysentry, size); | |
2359 | if (rsize < 0) | |
2360 | return NULL; | |
2361 | } | |
2362 | } | |
2363 | #endif /* DYNAMIC_SYSCALLS */ | |
2364 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2365 | { |
2366 | static sysset_t sysentry; | |
c906108c | 2367 | |
c3f6f71d JM |
2368 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2369 | ret = &sysentry; | |
2370 | } | |
37de36c6 | 2371 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2372 | if (save && ret) |
37de36c6 | 2373 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2374 | |
c3f6f71d JM |
2375 | return ret; |
2376 | } | |
c5aa993b | 2377 | |
c3f6f71d JM |
2378 | /* |
2379 | * Function: proc_get_traced_sysexit | |
2380 | * | |
2381 | * returns the set of syscalls that are traced /debugged on exit. | |
2382 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2383 | */ |
2384 | ||
c3f6f71d | 2385 | sysset_t * |
fba45db2 | 2386 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2387 | { |
c3f6f71d JM |
2388 | sysset_t * ret = NULL; |
2389 | ||
2390 | /* | |
2391 | * We should never have to apply this operation to any procinfo | |
2392 | * except the one for the main process. If that ever changes | |
19958708 | 2393 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2394 | * replace it with one that makes sure the ctl_fd is open. |
2395 | */ | |
19958708 | 2396 | |
c3f6f71d JM |
2397 | if (pi->tid != 0) |
2398 | pi = find_procinfo_or_die (pi->pid, 0); | |
2399 | ||
2400 | #ifdef NEW_PROC_API | |
2401 | if (!pi->status_valid) | |
2402 | if (!proc_get_status (pi)) | |
2403 | return NULL; | |
2404 | ||
37de36c6 | 2405 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2406 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2407 | #else /* DYNAMIC_SYSCALLS */ |
2408 | { | |
2409 | static sysset_t *sysexit; | |
2410 | size_t size; | |
2411 | ||
2412 | if (!sysexit) | |
2413 | sysexit = sysset_t_alloc (pi); | |
2414 | ret = sysexit; | |
2415 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2416 | return NULL; | |
2417 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2418 | { | |
2419 | gdb_premptysysset (sysexit); | |
2420 | } | |
2421 | else | |
2422 | { | |
2423 | int rsize; | |
2424 | ||
2425 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2426 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2427 | return NULL; | |
2428 | size = sysset_t_size (pi); | |
2429 | gdb_premptysysset (sysexit); | |
2430 | rsize = read (pi->status_fd, sysexit, size); | |
2431 | if (rsize < 0) | |
2432 | return NULL; | |
2433 | } | |
2434 | } | |
2435 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2436 | #else |
2437 | { | |
2438 | static sysset_t sysexit; | |
c5aa993b | 2439 | |
c3f6f71d JM |
2440 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2441 | ret = &sysexit; | |
2442 | } | |
2443 | #endif | |
2444 | if (save && ret) | |
37de36c6 | 2445 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2446 | |
2447 | return ret; | |
2448 | } | |
c906108c | 2449 | |
c3f6f71d JM |
2450 | /* |
2451 | * Function: proc_clear_current_fault | |
2452 | * | |
2453 | * The current fault (if any) is cleared; the associated signal | |
2454 | * will not be sent to the process or LWP when it resumes. | |
2455 | * Returns non-zero for success, zero for failure. | |
2456 | */ | |
c906108c | 2457 | |
c3f6f71d | 2458 | int |
fba45db2 | 2459 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2460 | { |
2461 | int win; | |
2462 | ||
2463 | /* | |
2464 | * We should never have to apply this operation to any procinfo | |
2465 | * except the one for the main process. If that ever changes | |
19958708 | 2466 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2467 | * replace it with one that makes sure the ctl_fd is open. |
2468 | */ | |
19958708 | 2469 | |
c3f6f71d JM |
2470 | if (pi->tid != 0) |
2471 | pi = find_procinfo_or_die (pi->pid, 0); | |
2472 | ||
2473 | #ifdef NEW_PROC_API | |
2474 | { | |
37de36c6 | 2475 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2476 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2477 | } | |
2478 | #else | |
2479 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2480 | #endif | |
2481 | ||
2482 | return win; | |
c906108c SS |
2483 | } |
2484 | ||
2485 | /* | |
c3f6f71d JM |
2486 | * Function: proc_set_current_signal |
2487 | * | |
2488 | * Set the "current signal" that will be delivered next to the process. | |
2489 | * NOTE: semantics are different from those of KILL. | |
2490 | * This signal will be delivered to the process or LWP | |
2491 | * immediately when it is resumed (even if the signal is held/blocked); | |
2492 | * it will NOT immediately cause another event of interest, and will NOT | |
2493 | * first trap back to the debugger. | |
2494 | * | |
2495 | * Returns non-zero for success, zero for failure. | |
2496 | */ | |
2497 | ||
2498 | int | |
fba45db2 | 2499 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2500 | { |
2501 | int win; | |
2502 | struct { | |
37de36c6 | 2503 | procfs_ctl_t cmd; |
c3f6f71d | 2504 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2505 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2506 | } arg; |
37de36c6 | 2507 | gdb_siginfo_t *mysinfo; |
c162e8c9 JM |
2508 | ptid_t wait_ptid; |
2509 | struct target_waitstatus wait_status; | |
c3f6f71d JM |
2510 | |
2511 | /* | |
2512 | * We should never have to apply this operation to any procinfo | |
2513 | * except the one for the main process. If that ever changes | |
19958708 | 2514 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2515 | * replace it with one that makes sure the ctl_fd is open. |
2516 | */ | |
19958708 | 2517 | |
c3f6f71d JM |
2518 | if (pi->tid != 0) |
2519 | pi = find_procinfo_or_die (pi->pid, 0); | |
2520 | ||
2521 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2522 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2523 | * receives a PIOCSSIG with a signal identical to the current signal, | |
19958708 | 2524 | * it messes up the current signal. Work around the kernel bug. |
c3f6f71d JM |
2525 | */ |
2526 | if (signo > 0 && | |
2527 | signo == proc_cursig (pi)) | |
2528 | return 1; /* I assume this is a success? */ | |
2529 | #endif | |
2530 | ||
2531 | /* The pointer is just a type alias. */ | |
37de36c6 | 2532 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c162e8c9 JM |
2533 | get_last_target_status (&wait_ptid, &wait_status); |
2534 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2535 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2536 | && wait_status.value.sig == target_signal_from_host (signo) | |
2537 | && proc_get_status (pi) | |
2538 | #ifdef NEW_PROC_API | |
2539 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2540 | #else | |
2541 | && pi->prstatus.pr_info.si_signo == signo | |
2542 | #endif | |
2543 | ) | |
2544 | /* Use the siginfo associated with the signal being | |
2545 | redelivered. */ | |
2546 | #ifdef NEW_PROC_API | |
2547 | memcpy (mysinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); | |
2548 | #else | |
2549 | memcpy (mysinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); | |
2550 | #endif | |
2551 | else | |
2552 | { | |
2553 | mysinfo->si_signo = signo; | |
2554 | mysinfo->si_code = 0; | |
2555 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2556 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2557 | } | |
c3f6f71d JM |
2558 | |
2559 | #ifdef NEW_PROC_API | |
2560 | arg.cmd = PCSSIG; | |
2561 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2562 | #else | |
2563 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2564 | #endif | |
c906108c | 2565 | |
c3f6f71d JM |
2566 | return win; |
2567 | } | |
c906108c | 2568 | |
c3f6f71d JM |
2569 | /* |
2570 | * Function: proc_clear_current_signal | |
2571 | * | |
2572 | * The current signal (if any) is cleared, and | |
2573 | * is not sent to the process or LWP when it resumes. | |
2574 | * Returns non-zero for success, zero for failure. | |
2575 | */ | |
c906108c | 2576 | |
c3f6f71d | 2577 | int |
fba45db2 | 2578 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2579 | { |
2580 | int win; | |
2581 | ||
2582 | /* | |
2583 | * We should never have to apply this operation to any procinfo | |
2584 | * except the one for the main process. If that ever changes | |
19958708 | 2585 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2586 | * replace it with one that makes sure the ctl_fd is open. |
2587 | */ | |
19958708 | 2588 | |
c3f6f71d JM |
2589 | if (pi->tid != 0) |
2590 | pi = find_procinfo_or_die (pi->pid, 0); | |
2591 | ||
2592 | #ifdef NEW_PROC_API | |
2593 | { | |
2594 | struct { | |
37de36c6 | 2595 | procfs_ctl_t cmd; |
c3f6f71d | 2596 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2597 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2598 | } arg; |
37de36c6 | 2599 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2600 | |
2601 | arg.cmd = PCSSIG; | |
2602 | /* The pointer is just a type alias. */ | |
37de36c6 | 2603 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2604 | mysinfo->si_signo = 0; |
2605 | mysinfo->si_code = 0; | |
2606 | mysinfo->si_errno = 0; | |
2607 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2608 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2609 | ||
2610 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2611 | } | |
2612 | #else | |
2613 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2614 | #endif | |
c906108c | 2615 | |
c3f6f71d JM |
2616 | return win; |
2617 | } | |
c906108c | 2618 | |
772cf8be MK |
2619 | /* Return the general-purpose registers for the process or LWP |
2620 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2621 | |
c3f6f71d | 2622 | gdb_gregset_t * |
fba45db2 | 2623 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2624 | { |
2625 | if (!pi->status_valid || !pi->gregs_valid) | |
2626 | if (!proc_get_status (pi)) | |
2627 | return NULL; | |
2628 | ||
772cf8be MK |
2629 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2630 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2631 | |
2632 | #ifdef NEW_PROC_API | |
772cf8be | 2633 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2634 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2635 | # else |
c3f6f71d | 2636 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2637 | # endif |
2638 | #else | |
c3f6f71d | 2639 | return &pi->prstatus.pr_reg; |
772cf8be | 2640 | #endif |
c3f6f71d | 2641 | } |
c5aa993b | 2642 | |
772cf8be MK |
2643 | /* Return the general-purpose registers for the process or LWP |
2644 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2645 | |
c3f6f71d | 2646 | gdb_fpregset_t * |
fba45db2 | 2647 | proc_get_fpregs (procinfo *pi) |
c906108c | 2648 | { |
c3f6f71d JM |
2649 | #ifdef NEW_PROC_API |
2650 | if (!pi->status_valid || !pi->fpregs_valid) | |
2651 | if (!proc_get_status (pi)) | |
2652 | return NULL; | |
2653 | ||
772cf8be | 2654 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2655 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2656 | # else |
c3f6f71d | 2657 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2658 | # endif |
c5aa993b | 2659 | |
772cf8be | 2660 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2661 | if (pi->fpregs_valid) |
772cf8be | 2662 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2663 | else |
c906108c | 2664 | { |
772cf8be | 2665 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2666 | { |
c3f6f71d | 2667 | return NULL; |
c906108c | 2668 | } |
c3f6f71d | 2669 | else |
c906108c | 2670 | { |
772cf8be | 2671 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2672 | struct { |
2673 | long pr_count; | |
2674 | tid_t pr_error_thread; | |
2675 | tfpregset_t thread_1; | |
2676 | } thread_fpregs; | |
2677 | ||
2678 | thread_fpregs.pr_count = 1; | |
2679 | thread_fpregs.thread_1.tid = pi->tid; | |
2680 | ||
772cf8be MK |
2681 | if (pi->tid == 0 |
2682 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2683 | { |
2684 | pi->fpregs_valid = 1; | |
772cf8be | 2685 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2686 | } |
772cf8be MK |
2687 | else if (pi->tid != 0 |
2688 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2689 | { |
2690 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2691 | sizeof (pi->fpregset)); | |
2692 | pi->fpregs_valid = 1; | |
772cf8be | 2693 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2694 | } |
2695 | else | |
2696 | { | |
2697 | return NULL; | |
2698 | } | |
772cf8be | 2699 | # else |
c3f6f71d JM |
2700 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2701 | { | |
2702 | pi->fpregs_valid = 1; | |
772cf8be | 2703 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2704 | } |
2705 | else | |
2706 | { | |
2707 | return NULL; | |
2708 | } | |
772cf8be | 2709 | # endif |
c906108c | 2710 | } |
c906108c | 2711 | } |
772cf8be | 2712 | #endif /* NEW_PROC_API */ |
c906108c SS |
2713 | } |
2714 | ||
772cf8be MK |
2715 | /* Write the general-purpose registers back to the process or LWP |
2716 | corresponding to PI. Return non-zero for success, zero for | |
2717 | failure. */ | |
c3f6f71d JM |
2718 | |
2719 | int | |
fba45db2 | 2720 | proc_set_gregs (procinfo *pi) |
c906108c | 2721 | { |
c3f6f71d JM |
2722 | gdb_gregset_t *gregs; |
2723 | int win; | |
c5aa993b | 2724 | |
772cf8be MK |
2725 | gregs = proc_get_gregs (pi); |
2726 | if (gregs == NULL) | |
2727 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2728 | |
772cf8be | 2729 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2730 | { |
c3f6f71d | 2731 | return 0; |
c906108c | 2732 | } |
c3f6f71d | 2733 | else |
c906108c | 2734 | { |
c3f6f71d JM |
2735 | #ifdef NEW_PROC_API |
2736 | struct { | |
37de36c6 | 2737 | procfs_ctl_t cmd; |
c3f6f71d JM |
2738 | /* Use char array to avoid alignment issues. */ |
2739 | char gregs[sizeof (gdb_gregset_t)]; | |
2740 | } arg; | |
2741 | ||
772cf8be | 2742 | arg.cmd = PCSREG; |
c3f6f71d JM |
2743 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2744 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2745 | #else | |
2746 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2747 | #endif | |
c906108c | 2748 | } |
c3f6f71d | 2749 | |
772cf8be | 2750 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2751 | pi->gregs_valid = 0; |
2752 | return win; | |
c906108c SS |
2753 | } |
2754 | ||
772cf8be MK |
2755 | /* Write the floating-pointer registers back to the process or LWP |
2756 | corresponding to PI. Return non-zero for success, zero for | |
2757 | failure. */ | |
c3f6f71d JM |
2758 | |
2759 | int | |
fba45db2 | 2760 | proc_set_fpregs (procinfo *pi) |
c906108c | 2761 | { |
c3f6f71d JM |
2762 | gdb_fpregset_t *fpregs; |
2763 | int win; | |
2764 | ||
772cf8be MK |
2765 | fpregs = proc_get_fpregs (pi); |
2766 | if (fpregs == NULL) | |
2767 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2768 | |
772cf8be | 2769 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2770 | { |
c3f6f71d | 2771 | return 0; |
c906108c | 2772 | } |
c3f6f71d | 2773 | else |
c906108c | 2774 | { |
c3f6f71d JM |
2775 | #ifdef NEW_PROC_API |
2776 | struct { | |
37de36c6 | 2777 | procfs_ctl_t cmd; |
c3f6f71d JM |
2778 | /* Use char array to avoid alignment issues. */ |
2779 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2780 | } arg; | |
2781 | ||
772cf8be | 2782 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2783 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2784 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2785 | #else | |
772cf8be | 2786 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2787 | if (pi->tid == 0) |
2788 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2789 | else | |
2790 | { | |
2791 | struct { | |
2792 | long pr_count; | |
2793 | tid_t pr_error_thread; | |
2794 | tfpregset_t thread_1; | |
2795 | } thread_fpregs; | |
2796 | ||
2797 | thread_fpregs.pr_count = 1; | |
2798 | thread_fpregs.thread_1.tid = pi->tid; | |
2799 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2800 | sizeof (*fpregs)); | |
2801 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2802 | } | |
772cf8be | 2803 | # else |
c3f6f71d | 2804 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2805 | # endif |
2806 | #endif /* NEW_PROC_API */ | |
c906108c | 2807 | } |
c3f6f71d | 2808 | |
772cf8be | 2809 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2810 | pi->fpregs_valid = 0; |
2811 | return win; | |
c906108c SS |
2812 | } |
2813 | ||
2814 | /* | |
c3f6f71d JM |
2815 | * Function: proc_kill |
2816 | * | |
2817 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2818 | * Returns non-zero for success, zero for failure. | |
2819 | */ | |
c906108c | 2820 | |
c3f6f71d | 2821 | int |
fba45db2 | 2822 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2823 | { |
2824 | int win; | |
c906108c | 2825 | |
c3f6f71d JM |
2826 | /* |
2827 | * We might conceivably apply this operation to an LWP, and | |
2828 | * the LWP's ctl file descriptor might not be open. | |
2829 | */ | |
c906108c | 2830 | |
c3f6f71d JM |
2831 | if (pi->ctl_fd == 0 && |
2832 | open_procinfo_files (pi, FD_CTL) == 0) | |
2833 | { | |
2834 | return 0; | |
2835 | } | |
2836 | else | |
2837 | { | |
2838 | #ifdef NEW_PROC_API | |
37de36c6 | 2839 | procfs_ctl_t cmd[2]; |
c906108c | 2840 | |
c3f6f71d JM |
2841 | cmd[0] = PCKILL; |
2842 | cmd[1] = signo; | |
2843 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2844 | #else /* ioctl method */ | |
2845 | /* FIXME: do I need the Alpha OSF fixups present in | |
2846 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2847 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2848 | #endif | |
2849 | } | |
c906108c | 2850 | |
c3f6f71d JM |
2851 | return win; |
2852 | } | |
c906108c | 2853 | |
c3f6f71d JM |
2854 | /* |
2855 | * Function: proc_parent_pid | |
2856 | * | |
2857 | * Find the pid of the process that started this one. | |
2858 | * Returns the parent process pid, or zero. | |
c906108c SS |
2859 | */ |
2860 | ||
c3f6f71d | 2861 | int |
fba45db2 | 2862 | proc_parent_pid (procinfo *pi) |
c906108c | 2863 | { |
c3f6f71d JM |
2864 | /* |
2865 | * We should never have to apply this operation to any procinfo | |
2866 | * except the one for the main process. If that ever changes | |
19958708 | 2867 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2868 | * replace it with one that makes sure the ctl_fd is open. |
2869 | */ | |
19958708 | 2870 | |
c3f6f71d JM |
2871 | if (pi->tid != 0) |
2872 | pi = find_procinfo_or_die (pi->pid, 0); | |
2873 | ||
2874 | if (!pi->status_valid) | |
2875 | if (!proc_get_status (pi)) | |
2876 | return 0; | |
c5aa993b | 2877 | |
c3f6f71d JM |
2878 | return pi->prstatus.pr_ppid; |
2879 | } | |
2880 | ||
2881 | ||
9a043c1d AC |
2882 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2883 | (a.k.a void pointer)! */ | |
2884 | ||
2885 | static void * | |
2886 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2887 | { | |
4e906f53 | 2888 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2889 | void *ptr; |
2890 | ||
4e906f53 | 2891 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2892 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2893 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2894 | return ptr; |
2895 | } | |
2896 | ||
c3f6f71d JM |
2897 | /* |
2898 | * Function: proc_set_watchpoint | |
2899 | * | |
2900 | */ | |
2901 | ||
2902 | int | |
fba45db2 | 2903 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2904 | { |
19958708 | 2905 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) |
c3f6f71d JM |
2906 | return 0; |
2907 | #else | |
2908 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2909 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2910 | return 0; | |
2911 | #else | |
2912 | struct { | |
37de36c6 | 2913 | procfs_ctl_t cmd; |
c3f6f71d JM |
2914 | char watch[sizeof (prwatch_t)]; |
2915 | } arg; | |
2916 | prwatch_t *pwatch; | |
2917 | ||
2918 | pwatch = (prwatch_t *) &arg.watch; | |
9a043c1d AC |
2919 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2920 | convert a target address into something that can be stored in a | |
2921 | native data structure. */ | |
831e682e | 2922 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
9a043c1d | 2923 | pwatch->pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2924 | #else |
9a043c1d | 2925 | pwatch->pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2926 | #endif |
c3f6f71d JM |
2927 | pwatch->pr_size = len; |
2928 | pwatch->pr_wflags = wflags; | |
2929 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2930 | arg.cmd = PCWATCH; | |
2931 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2932 | #else | |
2933 | #if defined (PIOCSWATCH) | |
2934 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2935 | #else | |
2936 | return 0; /* Fail */ | |
2937 | #endif | |
2938 | #endif | |
2939 | #endif | |
2940 | #endif | |
c906108c SS |
2941 | } |
2942 | ||
965b60ee | 2943 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2944 | |
c3f6f71d | 2945 | #include <sys/sysi86.h> |
c906108c | 2946 | |
c3f6f71d JM |
2947 | /* |
2948 | * Function: proc_get_LDT_entry | |
2949 | * | |
2950 | * Inputs: | |
2951 | * procinfo *pi; | |
2952 | * int key; | |
2953 | * | |
2954 | * The 'key' is actually the value of the lower 16 bits of | |
2955 | * the GS register for the LWP that we're interested in. | |
2956 | * | |
2957 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2958 | */ |
2959 | ||
c3f6f71d | 2960 | struct ssd * |
fba45db2 | 2961 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2962 | { |
c3f6f71d JM |
2963 | static struct ssd *ldt_entry = NULL; |
2964 | #ifdef NEW_PROC_API | |
2965 | char pathname[MAX_PROC_NAME_SIZE]; | |
2966 | struct cleanup *old_chain = NULL; | |
2967 | int fd; | |
2968 | ||
2969 | /* Allocate space for one LDT entry. | |
2970 | This alloc must persist, because we return a pointer to it. */ | |
2971 | if (ldt_entry == NULL) | |
2972 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2973 | ||
2974 | /* Open the file descriptor for the LDT table. */ | |
2975 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2976 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2977 | { |
c3f6f71d JM |
2978 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2979 | return NULL; | |
c906108c | 2980 | } |
c3f6f71d | 2981 | /* Make sure it gets closed again! */ |
004527cb | 2982 | old_chain = make_cleanup_close (fd); |
c906108c | 2983 | |
c3f6f71d JM |
2984 | /* Now 'read' thru the table, find a match and return it. */ |
2985 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2986 | { |
c3f6f71d JM |
2987 | if (ldt_entry->sel == 0 && |
2988 | ldt_entry->bo == 0 && | |
2989 | ldt_entry->acc1 == 0 && | |
2990 | ldt_entry->acc2 == 0) | |
2991 | break; /* end of table */ | |
2992 | /* If key matches, return this entry. */ | |
2993 | if (ldt_entry->sel == key) | |
2994 | return ldt_entry; | |
c906108c | 2995 | } |
c3f6f71d JM |
2996 | /* Loop ended, match not found. */ |
2997 | return NULL; | |
2998 | #else | |
2999 | int nldt, i; | |
3000 | static int nalloc = 0; | |
c906108c | 3001 | |
c3f6f71d JM |
3002 | /* Get the number of LDT entries. */ |
3003 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 3004 | { |
c3f6f71d JM |
3005 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
3006 | return NULL; | |
c906108c SS |
3007 | } |
3008 | ||
c3f6f71d JM |
3009 | /* Allocate space for the number of LDT entries. */ |
3010 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
3011 | if (nldt > nalloc) | |
c906108c | 3012 | { |
19958708 | 3013 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
3014 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
3015 | nalloc = nldt; | |
3016 | } | |
19958708 | 3017 | |
c3f6f71d JM |
3018 | /* Read the whole table in one gulp. */ |
3019 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
3020 | { | |
3021 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
3022 | return NULL; | |
c906108c SS |
3023 | } |
3024 | ||
c3f6f71d JM |
3025 | /* Search the table and return the (first) entry matching 'key'. */ |
3026 | for (i = 0; i < nldt; i++) | |
3027 | if (ldt_entry[i].sel == key) | |
3028 | return &ldt_entry[i]; | |
c906108c | 3029 | |
c3f6f71d JM |
3030 | /* Loop ended, match not found. */ |
3031 | return NULL; | |
3032 | #endif | |
3033 | } | |
c906108c | 3034 | |
965b60ee JB |
3035 | /* |
3036 | * Function: procfs_find_LDT_entry | |
3037 | * | |
3038 | * Input: | |
3039 | * ptid_t ptid; // The GDB-style pid-plus-LWP. | |
3040 | * | |
3041 | * Return: | |
3042 | * pointer to the corresponding LDT entry. | |
3043 | */ | |
3044 | ||
3045 | struct ssd * | |
3046 | procfs_find_LDT_entry (ptid_t ptid) | |
3047 | { | |
3048 | gdb_gregset_t *gregs; | |
3049 | int key; | |
3050 | procinfo *pi; | |
3051 | ||
3052 | /* Find procinfo for the lwp. */ | |
3053 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) | |
3054 | { | |
0b62613e | 3055 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
3056 | PIDGET (ptid), TIDGET (ptid)); |
3057 | return NULL; | |
3058 | } | |
3059 | /* get its general registers. */ | |
3060 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3061 | { | |
0b62613e | 3062 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
3063 | PIDGET (ptid), TIDGET (ptid)); |
3064 | return NULL; | |
3065 | } | |
3066 | /* Now extract the GS register's lower 16 bits. */ | |
3067 | key = (*gregs)[GS] & 0xffff; | |
3068 | ||
3069 | /* Find the matching entry and return it. */ | |
3070 | return proc_get_LDT_entry (pi, key); | |
3071 | } | |
3072 | ||
3073 | #endif | |
c906108c | 3074 | |
c3f6f71d | 3075 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 3076 | |
c3f6f71d | 3077 | /* =================== Thread "MODULE" =================== */ |
c906108c | 3078 | |
c3f6f71d JM |
3079 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
3080 | since there is a different way to do threads on every OS. */ | |
c906108c | 3081 | |
c3f6f71d | 3082 | /* |
19958708 | 3083 | * Function: proc_get_nthreads |
c3f6f71d | 3084 | * |
19958708 | 3085 | * Return the number of threads for the process |
c3f6f71d | 3086 | */ |
c906108c | 3087 | |
c3f6f71d JM |
3088 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
3089 | /* | |
3090 | * OSF version | |
3091 | */ | |
19958708 | 3092 | int |
fba45db2 | 3093 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
3094 | { |
3095 | int nthreads = 0; | |
c906108c | 3096 | |
c3f6f71d JM |
3097 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3098 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3099 | |
c3f6f71d | 3100 | return nthreads; |
c906108c SS |
3101 | } |
3102 | ||
c3f6f71d JM |
3103 | #else |
3104 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3105 | /* | |
3106 | * Solaris and Unixware version | |
3107 | */ | |
3108 | int | |
fba45db2 | 3109 | proc_get_nthreads (procinfo *pi) |
c906108c | 3110 | { |
c3f6f71d JM |
3111 | if (!pi->status_valid) |
3112 | if (!proc_get_status (pi)) | |
3113 | return 0; | |
c5aa993b | 3114 | |
c3f6f71d | 3115 | /* |
19958708 | 3116 | * NEW_PROC_API: only works for the process procinfo, |
c3f6f71d JM |
3117 | * because the LWP procinfos do not get prstatus filled in. |
3118 | */ | |
19958708 | 3119 | #ifdef NEW_PROC_API |
c3f6f71d JM |
3120 | if (pi->tid != 0) /* find the parent process procinfo */ |
3121 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3122 | #endif |
c3f6f71d | 3123 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3124 | } |
3125 | ||
c3f6f71d JM |
3126 | #else |
3127 | /* | |
3128 | * Default version | |
3129 | */ | |
3130 | int | |
fba45db2 | 3131 | proc_get_nthreads (procinfo *pi) |
c906108c | 3132 | { |
c3f6f71d JM |
3133 | return 0; |
3134 | } | |
3135 | #endif | |
3136 | #endif | |
3137 | ||
3138 | /* | |
3139 | * Function: proc_get_current_thread (LWP version) | |
3140 | * | |
3141 | * Return the ID of the thread that had an event of interest. | |
3142 | * (ie. the one that hit a breakpoint or other traced event). | |
3143 | * All other things being equal, this should be the ID of a | |
3144 | * thread that is currently executing. | |
3145 | */ | |
3146 | ||
3147 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3148 | /* | |
3149 | * Solaris and Unixware version | |
3150 | */ | |
3151 | int | |
fba45db2 | 3152 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3153 | { |
3154 | /* | |
3155 | * Note: this should be applied to the root procinfo for the process, | |
3156 | * not to the procinfo for an LWP. If applied to the procinfo for | |
19958708 | 3157 | * an LWP, it will simply return that LWP's ID. In that case, |
c3f6f71d JM |
3158 | * find the parent process procinfo. |
3159 | */ | |
19958708 | 3160 | |
c3f6f71d JM |
3161 | if (pi->tid != 0) |
3162 | pi = find_procinfo_or_die (pi->pid, 0); | |
3163 | ||
3164 | if (!pi->status_valid) | |
3165 | if (!proc_get_status (pi)) | |
3166 | return 0; | |
3167 | ||
3168 | #ifdef NEW_PROC_API | |
3169 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3170 | #else |
c3f6f71d | 3171 | return pi->prstatus.pr_who; |
c906108c | 3172 | #endif |
c3f6f71d | 3173 | } |
c906108c | 3174 | |
c3f6f71d JM |
3175 | #else |
3176 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3177 | /* | |
3178 | * OSF version | |
3179 | */ | |
19958708 | 3180 | int |
fba45db2 | 3181 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3182 | { |
3183 | #if 0 /* FIXME: not ready for prime time? */ | |
3184 | return pi->prstatus.pr_tid; | |
3185 | #else | |
3186 | return 0; | |
3187 | #endif | |
c906108c SS |
3188 | } |
3189 | ||
c3f6f71d JM |
3190 | #else |
3191 | /* | |
3192 | * Default version | |
3193 | */ | |
19958708 | 3194 | int |
fba45db2 | 3195 | proc_get_current_thread (procinfo *pi) |
c906108c | 3196 | { |
c3f6f71d JM |
3197 | return 0; |
3198 | } | |
3199 | ||
3200 | #endif | |
3201 | #endif | |
c906108c | 3202 | |
c3f6f71d | 3203 | /* |
19958708 | 3204 | * Function: proc_update_threads |
c3f6f71d JM |
3205 | * |
3206 | * Discover the IDs of all the threads within the process, and | |
3207 | * create a procinfo for each of them (chained to the parent). | |
3208 | * | |
3209 | * This unfortunately requires a different method on every OS. | |
3210 | * | |
3211 | * Return: non-zero for success, zero for failure. | |
3212 | */ | |
c906108c | 3213 | |
c3f6f71d | 3214 | int |
fba45db2 | 3215 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3216 | { |
3217 | if (thread && parent) /* sanity */ | |
c906108c | 3218 | { |
c3f6f71d JM |
3219 | thread->status_valid = 0; |
3220 | if (!proc_get_status (thread)) | |
3221 | destroy_one_procinfo (&parent->thread_list, thread); | |
3222 | } | |
3223 | return 0; /* keep iterating */ | |
3224 | } | |
c5aa993b | 3225 | |
c3f6f71d JM |
3226 | #if defined (PIOCLSTATUS) |
3227 | /* | |
3228 | * Solaris 2.5 (ioctl) version | |
3229 | */ | |
3230 | int | |
fba45db2 | 3231 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3232 | { |
3233 | gdb_prstatus_t *prstatus; | |
3234 | struct cleanup *old_chain = NULL; | |
3235 | procinfo *thread; | |
3236 | int nlwp, i; | |
3237 | ||
3238 | /* | |
3239 | * We should never have to apply this operation to any procinfo | |
3240 | * except the one for the main process. If that ever changes | |
19958708 | 3241 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3242 | * replace it with one that makes sure the ctl_fd is open. |
3243 | */ | |
19958708 | 3244 | |
c3f6f71d JM |
3245 | if (pi->tid != 0) |
3246 | pi = find_procinfo_or_die (pi->pid, 0); | |
3247 | ||
3248 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3249 | ||
3250 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3251 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3252 | ||
3c37485b | 3253 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3254 | |
b8c9b27d | 3255 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3256 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3257 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3258 | ||
3259 | /* Skip element zero, which represents the process as a whole. */ | |
3260 | for (i = 1; i < nlwp + 1; i++) | |
3261 | { | |
3262 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3263 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3264 | |
c3f6f71d JM |
3265 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3266 | thread->status_valid = 1; | |
3267 | } | |
3268 | pi->threads_valid = 1; | |
3269 | do_cleanups (old_chain); | |
3270 | return 1; | |
3271 | } | |
3272 | #else | |
3273 | #ifdef NEW_PROC_API | |
3274 | /* | |
3275 | * Unixware and Solaris 6 (and later) version | |
3276 | */ | |
004527cb AC |
3277 | static void |
3278 | do_closedir_cleanup (void *dir) | |
3279 | { | |
3280 | closedir (dir); | |
3281 | } | |
3282 | ||
c3f6f71d | 3283 | int |
fba45db2 | 3284 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3285 | { |
3286 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3287 | struct dirent *direntry; | |
3288 | struct cleanup *old_chain = NULL; | |
3289 | procinfo *thread; | |
3290 | DIR *dirp; | |
3291 | int lwpid; | |
3292 | ||
3293 | /* | |
3294 | * We should never have to apply this operation to any procinfo | |
3295 | * except the one for the main process. If that ever changes | |
19958708 | 3296 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3297 | * replace it with one that makes sure the ctl_fd is open. |
3298 | */ | |
19958708 | 3299 | |
c3f6f71d JM |
3300 | if (pi->tid != 0) |
3301 | pi = find_procinfo_or_die (pi->pid, 0); | |
3302 | ||
3303 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3304 | ||
3305 | /* | |
3306 | * Unixware | |
3307 | * | |
19958708 RM |
3308 | * Note: this brute-force method is the only way I know of |
3309 | * to accomplish this task on Unixware. This method will | |
c3f6f71d JM |
3310 | * also work on Solaris 2.6 and 2.7. There is a much simpler |
3311 | * and more elegant way to do this on Solaris, but the margins | |
3312 | * of this manuscript are too small to write it here... ;-) | |
3313 | */ | |
3314 | ||
3315 | strcpy (pathname, pi->pathname); | |
3316 | strcat (pathname, "/lwp"); | |
3317 | if ((dirp = opendir (pathname)) == NULL) | |
3318 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3319 | ||
004527cb | 3320 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3321 | while ((direntry = readdir (dirp)) != NULL) |
3322 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3323 | { | |
3324 | lwpid = atoi (&direntry->d_name[0]); | |
3325 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3326 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3327 | } | |
3328 | pi->threads_valid = 1; | |
3329 | do_cleanups (old_chain); | |
3330 | return 1; | |
3331 | } | |
3332 | #else | |
3333 | #ifdef PIOCTLIST | |
3334 | /* | |
3335 | * OSF version | |
3336 | */ | |
19958708 | 3337 | int |
fba45db2 | 3338 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3339 | { |
3340 | int nthreads, i; | |
3341 | tid_t *threads; | |
3342 | ||
3343 | /* | |
3344 | * We should never have to apply this operation to any procinfo | |
3345 | * except the one for the main process. If that ever changes | |
19958708 | 3346 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3347 | * replace it with one that makes sure the ctl_fd is open. |
3348 | */ | |
19958708 | 3349 | |
c3f6f71d JM |
3350 | if (pi->tid != 0) |
3351 | pi = find_procinfo_or_die (pi->pid, 0); | |
3352 | ||
3353 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3354 | ||
3355 | nthreads = proc_get_nthreads (pi); | |
3356 | if (nthreads < 2) | |
3357 | return 0; /* nothing to do for 1 or fewer threads */ | |
3358 | ||
3c37485b | 3359 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3360 | |
c3f6f71d JM |
3361 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3362 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3363 | ||
3364 | for (i = 0; i < nthreads; i++) | |
3365 | { | |
3366 | if (!find_procinfo (pi->pid, threads[i])) | |
3367 | if (!create_procinfo (pi->pid, threads[i])) | |
3368 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3369 | } |
c3f6f71d JM |
3370 | pi->threads_valid = 1; |
3371 | return 1; | |
c906108c | 3372 | } |
c3f6f71d JM |
3373 | #else |
3374 | /* | |
3375 | * Default version | |
3376 | */ | |
3377 | int | |
fba45db2 | 3378 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3379 | { |
3380 | return 0; | |
3381 | } | |
3382 | #endif /* OSF PIOCTLIST */ | |
3383 | #endif /* NEW_PROC_API */ | |
3384 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3385 | |
c3f6f71d JM |
3386 | /* |
3387 | * Function: proc_iterate_over_threads | |
3388 | * | |
3389 | * Description: | |
3390 | * Given a pointer to a function, call that function once | |
3391 | * for each lwp in the procinfo list, until the function | |
3392 | * returns non-zero, in which event return the value | |
3393 | * returned by the function. | |
3394 | * | |
3395 | * Note: this function does NOT call update_threads. | |
3396 | * If you want to discover new threads first, you must | |
3397 | * call that function explicitly. This function just makes | |
19958708 RM |
3398 | * a quick pass over the currently-known procinfos. |
3399 | * | |
c3f6f71d JM |
3400 | * Arguments: |
3401 | * pi - parent process procinfo | |
3402 | * func - per-thread function | |
3403 | * ptr - opaque parameter for function. | |
3404 | * | |
3405 | * Return: | |
3406 | * First non-zero return value from the callee, or zero. | |
3407 | */ | |
3408 | ||
3409 | int | |
d0849a9a KB |
3410 | proc_iterate_over_threads (procinfo *pi, |
3411 | int (*func) (procinfo *, procinfo *, void *), | |
3412 | void *ptr) | |
c906108c | 3413 | { |
c3f6f71d JM |
3414 | procinfo *thread, *next; |
3415 | int retval = 0; | |
c906108c | 3416 | |
c3f6f71d JM |
3417 | /* |
3418 | * We should never have to apply this operation to any procinfo | |
3419 | * except the one for the main process. If that ever changes | |
19958708 | 3420 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3421 | * replace it with one that makes sure the ctl_fd is open. |
3422 | */ | |
19958708 | 3423 | |
c3f6f71d JM |
3424 | if (pi->tid != 0) |
3425 | pi = find_procinfo_or_die (pi->pid, 0); | |
3426 | ||
3427 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3428 | { |
c3f6f71d JM |
3429 | next = thread->next; /* in case thread is destroyed */ |
3430 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3431 | break; | |
c906108c | 3432 | } |
c3f6f71d JM |
3433 | |
3434 | return retval; | |
c906108c SS |
3435 | } |
3436 | ||
c3f6f71d JM |
3437 | /* =================== END, Thread "MODULE" =================== */ |
3438 | ||
3439 | /* =================== END, /proc "MODULE" =================== */ | |
3440 | ||
3441 | /* =================== GDB "MODULE" =================== */ | |
3442 | ||
3443 | /* | |
3444 | * Here are all of the gdb target vector functions and their friends. | |
3445 | */ | |
3446 | ||
39f77062 | 3447 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3448 | static void do_detach (int signo); |
37de36c6 | 3449 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
9185ddce JB |
3450 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
3451 | int entry_or_exit, int mode, int from_tty); | |
3452 | static int insert_dbx_link_breakpoint (procinfo *pi); | |
3453 | static void remove_dbx_link_breakpoint (void); | |
3454 | ||
3455 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3456 | the startup phase. The following two variables are used to record | |
3457 | the address of the breakpoint, and the code that was replaced by | |
3458 | a breakpoint. */ | |
3459 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3460 | static void *dbx_link_bpt; |
c3f6f71d JM |
3461 | |
3462 | /* | |
3463 | * Function: procfs_debug_inferior | |
3464 | * | |
3465 | * Sets up the inferior to be debugged. | |
3466 | * Registers to trace signals, hardware faults, and syscalls. | |
3467 | * Note: does not set RLC flag: caller may want to customize that. | |
3468 | * | |
3469 | * Returns: zero for success (note! unlike most functions in this module) | |
3470 | * On failure, returns the LINE NUMBER where it failed! | |
3471 | */ | |
3472 | ||
3473 | static int | |
fba45db2 | 3474 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3475 | { |
c3f6f71d | 3476 | fltset_t traced_faults; |
37de36c6 KB |
3477 | gdb_sigset_t traced_signals; |
3478 | sysset_t *traced_syscall_entries; | |
3479 | sysset_t *traced_syscall_exits; | |
3480 | int status; | |
c906108c | 3481 | |
c3f6f71d JM |
3482 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3483 | /* On some systems (OSF), we don't trace hardware faults. | |
3484 | Apparently it's enough that we catch them as signals. | |
3485 | Wonder why we don't just do that in general? */ | |
3486 | premptyset (&traced_faults); /* don't trace faults. */ | |
3487 | #else | |
3488 | /* Register to trace hardware faults in the child. */ | |
3489 | prfillset (&traced_faults); /* trace all faults... */ | |
3490 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3491 | #endif | |
3492 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3493 | return __LINE__; | |
c906108c | 3494 | |
c3f6f71d JM |
3495 | /* Register to trace selected signals in the child. */ |
3496 | premptyset (&traced_signals); | |
3497 | if (!register_gdb_signals (pi, &traced_signals)) | |
3498 | return __LINE__; | |
3499 | ||
37de36c6 | 3500 | |
c3f6f71d | 3501 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3502 | traced_syscall_entries = sysset_t_alloc (pi); |
3503 | gdb_premptysysset (traced_syscall_entries); | |
3504 | #ifdef SYS_exit | |
3505 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3506 | #endif | |
c3f6f71d | 3507 | #ifdef SYS_lwpexit |
37de36c6 | 3508 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3509 | #endif |
3510 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3511 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3512 | #endif | |
3513 | #ifdef DYNAMIC_SYSCALLS | |
3514 | { | |
3515 | int callnum = find_syscall (pi, "_exit"); | |
3516 | if (callnum >= 0) | |
3517 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3518 | } | |
c906108c SS |
3519 | #endif |
3520 | ||
37de36c6 KB |
3521 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3522 | xfree (traced_syscall_entries); | |
3523 | if (!status) | |
c3f6f71d JM |
3524 | return __LINE__; |
3525 | ||
3526 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3527 | /* OSF method for tracing exec syscalls. Quoting: | |
3528 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3529 | exits from exec system calls because of the user level loader. */ | |
3530 | /* FIXME: make nice and maybe move into an access function. */ | |
3531 | { | |
3532 | int prfs_flags; | |
3533 | ||
3534 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3535 | return __LINE__; | |
3536 | ||
3537 | prfs_flags |= PRFS_STOPEXEC; | |
3538 | ||
3539 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3540 | return __LINE__; | |
3541 | } | |
3542 | #else /* not PRFS_STOPEXEC */ | |
3543 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3544 | /* GW: Rationale... | |
3545 | Not all systems with /proc have all the exec* syscalls with the same | |
3546 | names. On the SGI, for example, there is no SYS_exec, but there | |
3547 | *is* a SYS_execv. So, we try to account for that. */ | |
3548 | ||
37de36c6 KB |
3549 | traced_syscall_exits = sysset_t_alloc (pi); |
3550 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3551 | #ifdef SYS_exec |
37de36c6 | 3552 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3553 | #endif |
3554 | #ifdef SYS_execve | |
37de36c6 | 3555 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3556 | #endif |
3557 | #ifdef SYS_execv | |
37de36c6 | 3558 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3559 | #endif |
c5aa993b | 3560 | |
c3f6f71d | 3561 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3562 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3563 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3564 | #endif |
c5aa993b | 3565 | |
c3f6f71d | 3566 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3567 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3568 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3569 | #endif |
c5aa993b | 3570 | |
37de36c6 KB |
3571 | #ifdef DYNAMIC_SYSCALLS |
3572 | { | |
3573 | int callnum = find_syscall (pi, "execve"); | |
3574 | if (callnum >= 0) | |
3575 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3576 | callnum = find_syscall (pi, "ra_execve"); | |
3577 | if (callnum >= 0) | |
3578 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3579 | } | |
3580 | #endif | |
c906108c | 3581 | |
37de36c6 KB |
3582 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3583 | xfree (traced_syscall_exits); | |
3584 | if (!status) | |
c3f6f71d JM |
3585 | return __LINE__; |
3586 | ||
3587 | #endif /* PRFS_STOPEXEC */ | |
3588 | return 0; | |
c906108c SS |
3589 | } |
3590 | ||
19958708 | 3591 | static void |
136d6dae | 3592 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3593 | { |
c3f6f71d JM |
3594 | char *exec_file; |
3595 | int pid; | |
3596 | ||
3597 | if (!args) | |
e2e0b3e5 | 3598 | error_no_arg (_("process-id to attach")); |
c3f6f71d JM |
3599 | |
3600 | pid = atoi (args); | |
3601 | if (pid == getpid ()) | |
8a3fe4f8 | 3602 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3603 | |
c3f6f71d | 3604 | if (from_tty) |
c906108c | 3605 | { |
c3f6f71d JM |
3606 | exec_file = get_exec_file (0); |
3607 | ||
3608 | if (exec_file) | |
a3f17187 | 3609 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3610 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3611 | else |
a3f17187 | 3612 | printf_filtered (_("Attaching to %s\n"), |
39f77062 | 3613 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3614 | |
3615 | fflush (stdout); | |
c906108c | 3616 | } |
39f77062 | 3617 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3618 | push_target (ops); |
c3f6f71d JM |
3619 | } |
3620 | ||
19958708 | 3621 | static void |
136d6dae | 3622 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3623 | { |
cc377e6b | 3624 | int sig = 0; |
7f9f62ba | 3625 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3626 | |
3627 | if (args) | |
3628 | sig = atoi (args); | |
c3f6f71d JM |
3629 | |
3630 | if (from_tty) | |
c906108c | 3631 | { |
cc377e6b MK |
3632 | char *exec_file; |
3633 | ||
c3f6f71d | 3634 | exec_file = get_exec_file (0); |
cc377e6b | 3635 | if (exec_file == NULL) |
c3f6f71d | 3636 | exec_file = ""; |
cc377e6b | 3637 | |
a3f17187 | 3638 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3639 | target_pid_to_str (pid_to_ptid (pid))); |
3640 | gdb_flush (gdb_stdout); | |
c906108c | 3641 | } |
19958708 | 3642 | |
cc377e6b MK |
3643 | do_detach (sig); |
3644 | ||
39f77062 | 3645 | inferior_ptid = null_ptid; |
7f9f62ba | 3646 | detach_inferior (pid); |
28439f5e | 3647 | unpush_target (ops); |
c906108c SS |
3648 | } |
3649 | ||
39f77062 KB |
3650 | static ptid_t |
3651 | do_attach (ptid_t ptid) | |
c906108c | 3652 | { |
c3f6f71d | 3653 | procinfo *pi; |
181e7f93 | 3654 | struct inferior *inf; |
c3f6f71d | 3655 | int fail; |
2689673f | 3656 | int lwpid; |
c3f6f71d | 3657 | |
39f77062 | 3658 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3659 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3660 | |
3661 | if (!open_procinfo_files (pi, FD_CTL)) | |
3662 | { | |
3663 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3664 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3665 | PIDGET (ptid)); |
c3f6f71d JM |
3666 | dead_procinfo (pi, errmsg, NOKILL); |
3667 | } | |
c906108c | 3668 | |
c3f6f71d JM |
3669 | /* Stop the process (if it isn't already stopped). */ |
3670 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3671 | { |
c3f6f71d JM |
3672 | pi->was_stopped = 1; |
3673 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3674 | } |
3675 | else | |
3676 | { | |
c3f6f71d JM |
3677 | pi->was_stopped = 0; |
3678 | /* Set the process to run again when we close it. */ | |
3679 | if (!proc_set_run_on_last_close (pi)) | |
3680 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3681 | ||
3682 | /* Now stop the process. */ | |
3683 | if (!proc_stop_process (pi)) | |
3684 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3685 | pi->ignore_next_sigstop = 1; | |
c906108c | 3686 | } |
c3f6f71d JM |
3687 | /* Save some of the /proc state to be restored if we detach. */ |
3688 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3689 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3690 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3691 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3692 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3693 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3694 | NOKILL); | |
37de36c6 | 3695 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3696 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3697 | NOKILL); |
3698 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3699 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3700 | ||
3701 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3702 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3703 | ||
181e7f93 | 3704 | inf = add_inferior (pi->pid); |
c3f6f71d | 3705 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3706 | inf->attach_flag = 1; |
2689673f PA |
3707 | |
3708 | /* Create a procinfo for the current lwp. */ | |
3709 | lwpid = proc_get_current_thread (pi); | |
3710 | create_procinfo (pi->pid, lwpid); | |
3711 | ||
3712 | /* Add it to gdb's thread list. */ | |
3713 | ptid = MERGEPID (pi->pid, lwpid); | |
3714 | add_thread (ptid); | |
3715 | ||
3716 | return ptid; | |
c906108c SS |
3717 | } |
3718 | ||
3719 | static void | |
fba45db2 | 3720 | do_detach (int signo) |
c906108c | 3721 | { |
c3f6f71d | 3722 | procinfo *pi; |
c906108c | 3723 | |
c3f6f71d | 3724 | /* Find procinfo for the main process */ |
39f77062 | 3725 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3726 | if (signo) |
3727 | if (!proc_set_current_signal (pi, signo)) | |
3728 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3729 | |
c3f6f71d JM |
3730 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3731 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3732 | |
c3f6f71d JM |
3733 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3734 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3735 | ||
37de36c6 | 3736 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3737 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3738 | ||
37de36c6 | 3739 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3740 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3741 | ||
3742 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3743 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3744 | ||
3745 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3746 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3747 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3748 | { |
3749 | /* Clear any pending signal. */ | |
3750 | if (!proc_clear_current_fault (pi)) | |
3751 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3752 | ||
1a303dec MS |
3753 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3754 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3755 | ||
c3f6f71d JM |
3756 | if (!proc_set_run_on_last_close (pi)) |
3757 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3758 | } | |
3759 | ||
c3f6f71d | 3760 | destroy_procinfo (pi); |
c906108c SS |
3761 | } |
3762 | ||
772cf8be MK |
3763 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3764 | for all registers. | |
3765 | ||
3766 | ??? Is the following note still relevant? We can't get individual | |
3767 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3768 | don't bother with caching at all in that case. | |
3769 | ||
3770 | NOTE: Since the /proc interface cannot give us individual | |
3771 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3772 | This results in the possibility that we will do unnecessarily many | |
3773 | fetches, since we may be called repeatedly for individual | |
3774 | registers. So we cache the results, and mark the cache invalid | |
3775 | when the process is resumed. */ | |
c3f6f71d | 3776 | |
c906108c | 3777 | static void |
28439f5e PA |
3778 | procfs_fetch_registers (struct target_ops *ops, |
3779 | struct regcache *regcache, int regnum) | |
c906108c | 3780 | { |
772cf8be MK |
3781 | gdb_gregset_t *gregs; |
3782 | procinfo *pi; | |
3783 | int pid = PIDGET (inferior_ptid); | |
3784 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3785 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3786 | |
2689673f | 3787 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3788 | |
3789 | if (pi == NULL) | |
8a3fe4f8 | 3790 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3791 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3792 | |
772cf8be MK |
3793 | gregs = proc_get_gregs (pi); |
3794 | if (gregs == NULL) | |
c3f6f71d JM |
3795 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3796 | ||
56be3814 | 3797 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3798 | |
40a6adc1 | 3799 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3800 | { |
772cf8be MK |
3801 | gdb_fpregset_t *fpregs; |
3802 | ||
40a6adc1 MD |
3803 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3804 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3805 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3806 | return; /* Not a floating point register. */ |
c5aa993b | 3807 | |
772cf8be MK |
3808 | fpregs = proc_get_fpregs (pi); |
3809 | if (fpregs == NULL) | |
60054393 | 3810 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3811 | |
56be3814 | 3812 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3813 | } |
c906108c SS |
3814 | } |
3815 | ||
772cf8be MK |
3816 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3817 | this for all registers. | |
3818 | ||
3819 | NOTE: Since the /proc interface will not read individual registers, | |
3820 | we will cache these requests until the process is resumed, and only | |
3821 | then write them back to the inferior process. | |
3822 | ||
3823 | FIXME: is that a really bad idea? Have to think about cases where | |
3824 | writing one register might affect the value of others, etc. */ | |
c906108c | 3825 | |
c3f6f71d | 3826 | static void |
28439f5e PA |
3827 | procfs_store_registers (struct target_ops *ops, |
3828 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3829 | { |
772cf8be MK |
3830 | gdb_gregset_t *gregs; |
3831 | procinfo *pi; | |
3832 | int pid = PIDGET (inferior_ptid); | |
3833 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3834 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3835 | |
2689673f | 3836 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3837 | |
3838 | if (pi == NULL) | |
8a3fe4f8 | 3839 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3840 | target_pid_to_str (inferior_ptid)); |
c906108c | 3841 | |
772cf8be MK |
3842 | gregs = proc_get_gregs (pi); |
3843 | if (gregs == NULL) | |
c3f6f71d | 3844 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3845 | |
56be3814 | 3846 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3847 | if (!proc_set_gregs (pi)) |
3848 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3849 | |
40a6adc1 | 3850 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3851 | { |
772cf8be MK |
3852 | gdb_fpregset_t *fpregs; |
3853 | ||
40a6adc1 MD |
3854 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3855 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3856 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3857 | return; /* Not a floating point register. */ |
60054393 | 3858 | |
772cf8be MK |
3859 | fpregs = proc_get_fpregs (pi); |
3860 | if (fpregs == NULL) | |
60054393 MS |
3861 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3862 | ||
56be3814 | 3863 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3864 | if (!proc_set_fpregs (pi)) |
3865 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3866 | } | |
c3f6f71d | 3867 | } |
c906108c | 3868 | |
37de36c6 KB |
3869 | static int |
3870 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3871 | { | |
3872 | ||
3873 | #ifdef SYS_lwp_exit | |
3874 | if (scall == SYS_lwp_exit) | |
3875 | return 1; | |
3876 | #endif | |
3877 | #ifdef SYS_lwpexit | |
3878 | if (scall == SYS_lwpexit) | |
3879 | return 1; | |
3880 | #endif | |
3881 | return 0; | |
3882 | } | |
3883 | ||
3884 | static int | |
3885 | syscall_is_exit (procinfo *pi, int scall) | |
3886 | { | |
3887 | #ifdef SYS_exit | |
3888 | if (scall == SYS_exit) | |
3889 | return 1; | |
3890 | #endif | |
3891 | #ifdef DYNAMIC_SYSCALLS | |
3892 | if (find_syscall (pi, "_exit") == scall) | |
3893 | return 1; | |
3894 | #endif | |
3895 | return 0; | |
3896 | } | |
3897 | ||
3898 | static int | |
3899 | syscall_is_exec (procinfo *pi, int scall) | |
3900 | { | |
3901 | #ifdef SYS_exec | |
3902 | if (scall == SYS_exec) | |
3903 | return 1; | |
3904 | #endif | |
3905 | #ifdef SYS_execv | |
3906 | if (scall == SYS_execv) | |
3907 | return 1; | |
3908 | #endif | |
3909 | #ifdef SYS_execve | |
3910 | if (scall == SYS_execve) | |
3911 | return 1; | |
3912 | #endif | |
3913 | #ifdef DYNAMIC_SYSCALLS | |
3914 | if (find_syscall (pi, "_execve")) | |
3915 | return 1; | |
3916 | if (find_syscall (pi, "ra_execve")) | |
3917 | return 1; | |
3918 | #endif | |
3919 | return 0; | |
3920 | } | |
3921 | ||
3922 | static int | |
3923 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3924 | { | |
3925 | #ifdef SYS_lwp_create | |
3926 | if (scall == SYS_lwp_create) | |
3927 | return 1; | |
3928 | #endif | |
3929 | #ifdef SYS_lwpcreate | |
3930 | if (scall == SYS_lwpcreate) | |
3931 | return 1; | |
3932 | #endif | |
3933 | return 0; | |
3934 | } | |
3935 | ||
c3f6f71d JM |
3936 | /* |
3937 | * Function: target_wait | |
3938 | * | |
3939 | * Retrieve the next stop event from the child process. | |
3940 | * If child has not stopped yet, wait for it to stop. | |
3941 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3942 | * into gdb internal event codes. | |
3943 | * | |
3944 | * Return: id of process (and possibly thread) that incurred the event. | |
3945 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3946 | */ |
3947 | ||
39f77062 | 3948 | static ptid_t |
117de6a9 PA |
3949 | procfs_wait (struct target_ops *ops, |
3950 | ptid_t ptid, struct target_waitstatus *status) | |
c906108c | 3951 | { |
c3f6f71d JM |
3952 | /* First cut: loosely based on original version 2.1 */ |
3953 | procinfo *pi; | |
39f77062 KB |
3954 | int wstat; |
3955 | int temp_tid; | |
3956 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3957 | int why, what, flags; |
3958 | int retry = 0; | |
c906108c | 3959 | |
c3f6f71d | 3960 | wait_again: |
c906108c | 3961 | |
c3f6f71d JM |
3962 | retry++; |
3963 | wstat = 0; | |
39f77062 | 3964 | retval = pid_to_ptid (-1); |
c906108c | 3965 | |
c3f6f71d | 3966 | /* Find procinfo for main process */ |
39f77062 | 3967 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3968 | if (pi) |
c906108c | 3969 | { |
c3f6f71d JM |
3970 | /* We must assume that the status is stale now... */ |
3971 | pi->status_valid = 0; | |
3972 | pi->gregs_valid = 0; | |
3973 | pi->fpregs_valid = 0; | |
3974 | ||
3975 | #if 0 /* just try this out... */ | |
3976 | flags = proc_flags (pi); | |
3977 | why = proc_why (pi); | |
3978 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3979 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3980 | #endif | |
3981 | /* If child is not stopped, wait for it to stop. */ | |
3982 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3983 | !proc_wait_for_stop (pi)) | |
c906108c | 3984 | { |
c3f6f71d JM |
3985 | /* wait_for_stop failed: has the child terminated? */ |
3986 | if (errno == ENOENT) | |
c906108c | 3987 | { |
39f77062 KB |
3988 | int wait_retval; |
3989 | ||
c3f6f71d | 3990 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 3991 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 3992 | |
39f77062 | 3993 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
8a3fe4f8 | 3994 | error (_("procfs: couldn't stop process %d: wait returned %d."), |
39f77062 | 3995 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
3996 | /* FIXME: might I not just use waitpid? |
3997 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 3998 | retval = pid_to_ptid (wait_retval); |
c906108c | 3999 | } |
d1566ff5 FN |
4000 | else if (errno == EINTR) |
4001 | goto wait_again; | |
c3f6f71d | 4002 | else |
c906108c | 4003 | { |
c3f6f71d JM |
4004 | /* Unknown error from wait_for_stop. */ |
4005 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 4006 | } |
c3f6f71d JM |
4007 | } |
4008 | else | |
4009 | { | |
4010 | /* This long block is reached if either: | |
4011 | a) the child was already stopped, or | |
4012 | b) we successfully waited for the child with wait_for_stop. | |
4013 | This block will analyze the /proc status, and translate it | |
4014 | into a waitstatus for GDB. | |
4015 | ||
4016 | If we actually had to call wait because the /proc file | |
19958708 | 4017 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
4018 | because we already have a waitstatus. */ |
4019 | ||
4020 | flags = proc_flags (pi); | |
4021 | why = proc_why (pi); | |
4022 | what = proc_what (pi); | |
4023 | ||
c3f6f71d | 4024 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4025 | { |
c3f6f71d JM |
4026 | #ifdef PR_ASYNC |
4027 | /* If it's running async (for single_thread control), | |
4028 | set it back to normal again. */ | |
4029 | if (flags & PR_ASYNC) | |
4030 | if (!proc_unset_async (pi)) | |
4031 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
4032 | #endif | |
4033 | ||
4034 | if (info_verbose) | |
4035 | proc_prettyprint_why (why, what, 1); | |
4036 | ||
4037 | /* The 'pid' we will return to GDB is composed of | |
4038 | the process ID plus the lwp ID. */ | |
4039 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
4040 | ||
4041 | switch (why) { | |
4042 | case PR_SIGNALLED: | |
4043 | wstat = (what << 8) | 0177; | |
4044 | break; | |
4045 | case PR_SYSENTRY: | |
37de36c6 | 4046 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 4047 | { |
17faa917 DJ |
4048 | if (print_thread_events) |
4049 | printf_unfiltered (_("[%s exited]\n"), | |
4050 | target_pid_to_str (retval)); | |
37de36c6 KB |
4051 | delete_thread (retval); |
4052 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4053 | return retval; | |
4054 | } | |
4055 | else if (syscall_is_exit (pi, what)) | |
4056 | { | |
181e7f93 PA |
4057 | struct inferior *inf; |
4058 | ||
37de36c6 KB |
4059 | /* Handle SYS_exit call only */ |
4060 | /* Stopped at entry to SYS_exit. | |
19958708 | 4061 | Make it runnable, resume it, then use |
37de36c6 | 4062 | the wait system call to get its exit code. |
19958708 | 4063 | Proc_run_process always clears the current |
37de36c6 KB |
4064 | fault and signal. |
4065 | Then return its exit status. */ | |
4066 | pi->status_valid = 0; | |
4067 | wstat = 0; | |
19958708 | 4068 | /* FIXME: what we should do is return |
37de36c6 KB |
4069 | TARGET_WAITKIND_SPURIOUS. */ |
4070 | if (!proc_run_process (pi, 0, 0)) | |
4071 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
4072 | |
4073 | inf = find_inferior_pid (pi->pid); | |
4074 | if (inf->attach_flag) | |
c3f6f71d | 4075 | { |
19958708 | 4076 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
4077 | return a "success" exit code. Bogus: what if |
4078 | it returns something else? */ | |
4079 | wstat = 0; | |
39f77062 | 4080 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
4081 | } |
4082 | else | |
4083 | { | |
4084 | int temp = wait (&wstat); | |
4085 | ||
4086 | /* FIXME: shouldn't I make sure I get the right | |
4087 | event from the right process? If (for | |
4088 | instance) I have killed an earlier inferior | |
4089 | process but failed to clean up after it | |
4090 | somehow, I could get its termination event | |
4091 | here. */ | |
4092 | ||
4093 | /* If wait returns -1, that's what we return to GDB. */ | |
4094 | if (temp < 0) | |
39f77062 | 4095 | retval = pid_to_ptid (temp); |
c3f6f71d | 4096 | } |
c3f6f71d | 4097 | } |
37de36c6 KB |
4098 | else |
4099 | { | |
a3f17187 | 4100 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
4101 | proc_prettyprint_syscall (proc_what (pi), 0); |
4102 | printf_filtered ("\n"); | |
4103 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4104 | { |
37de36c6 | 4105 | long i, nsysargs, *sysargs; |
c3f6f71d | 4106 | |
37de36c6 KB |
4107 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4108 | (sysargs = proc_sysargs (pi)) != NULL) | |
4109 | { | |
a3f17187 | 4110 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 4111 | for (i = 0; i < nsysargs; i++) |
19958708 | 4112 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4113 | i, sysargs[i]); |
4114 | } | |
c3f6f71d | 4115 | |
c3f6f71d | 4116 | } |
c3f6f71d | 4117 | #endif |
37de36c6 KB |
4118 | if (status) |
4119 | { | |
4120 | /* How to exit gracefully, returning "unknown event" */ | |
4121 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4122 | return inferior_ptid; |
37de36c6 KB |
4123 | } |
4124 | else | |
4125 | { | |
4126 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4127 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4128 | goto wait_again; |
4129 | } | |
4130 | } | |
4131 | break; | |
4132 | case PR_SYSEXIT: | |
4133 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4134 | { |
37de36c6 KB |
4135 | /* Hopefully this is our own "fork-child" execing |
4136 | the real child. Hoax this event into a trap, and | |
4137 | GDB will see the child about to execute its start | |
4138 | address. */ | |
4139 | wstat = (SIGTRAP << 8) | 0177; | |
4140 | } | |
9185ddce JB |
4141 | #ifdef SYS_syssgi |
4142 | else if (what == SYS_syssgi) | |
4143 | { | |
4144 | /* see if we can break on dbx_link(). If yes, then | |
4145 | we no longer need the SYS_syssgi notifications. */ | |
4146 | if (insert_dbx_link_breakpoint (pi)) | |
4147 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4148 | FLAG_RESET, 0); | |
4149 | ||
4150 | /* This is an internal event and should be transparent | |
4151 | to wfi, so resume the execution and wait again. See | |
4152 | comment in procfs_init_inferior() for more details. */ | |
4153 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4154 | goto wait_again; | |
4155 | } | |
4156 | #endif | |
37de36c6 KB |
4157 | else if (syscall_is_lwp_create (pi, what)) |
4158 | { | |
4159 | /* | |
4160 | * This syscall is somewhat like fork/exec. | |
4161 | * We will get the event twice: once for the parent LWP, | |
4162 | * and once for the child. We should already know about | |
4163 | * the parent LWP, but the child will be new to us. So, | |
4164 | * whenever we get this event, if it represents a new | |
4165 | * thread, simply add the thread to the list. | |
4166 | */ | |
c3f6f71d | 4167 | |
37de36c6 | 4168 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4169 | temp_tid = proc_get_current_thread (pi); |
4170 | if (!find_procinfo (pi->pid, temp_tid)) | |
4171 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4172 | |
39f77062 | 4173 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4174 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4175 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4176 | add_thread (temp_ptid); |
4177 | ||
37de36c6 KB |
4178 | /* Return to WFI, but tell it to immediately resume. */ |
4179 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4180 | return inferior_ptid; |
37de36c6 KB |
4181 | } |
4182 | else if (syscall_is_lwp_exit (pi, what)) | |
4183 | { | |
17faa917 DJ |
4184 | if (print_thread_events) |
4185 | printf_unfiltered (_("[%s exited]\n"), | |
4186 | target_pid_to_str (retval)); | |
37de36c6 KB |
4187 | delete_thread (retval); |
4188 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4189 | return retval; | |
c3f6f71d | 4190 | } |
37de36c6 KB |
4191 | else if (0) |
4192 | { | |
4193 | /* FIXME: Do we need to handle SYS_sproc, | |
4194 | SYS_fork, or SYS_vfork here? The old procfs | |
4195 | seemed to use this event to handle threads on | |
4196 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4197 | that threads were actually separate processes. |
37de36c6 KB |
4198 | Irix, maybe? Anyway, low priority for now. */ |
4199 | } | |
4200 | else | |
4201 | { | |
a3f17187 | 4202 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4203 | proc_prettyprint_syscall (proc_what (pi), 0); |
4204 | printf_filtered ("\n"); | |
4205 | #ifndef PIOCSSPCACT | |
4206 | { | |
4207 | long i, nsysargs, *sysargs; | |
4208 | ||
4209 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4210 | (sysargs = proc_sysargs (pi)) != NULL) | |
4211 | { | |
a3f17187 | 4212 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 4213 | for (i = 0; i < nsysargs; i++) |
19958708 | 4214 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4215 | i, sysargs[i]); |
4216 | } | |
4217 | } | |
c3f6f71d | 4218 | #endif |
37de36c6 | 4219 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4220 | return inferior_ptid; |
37de36c6 | 4221 | } |
c3f6f71d JM |
4222 | break; |
4223 | case PR_REQUESTED: | |
4224 | #if 0 /* FIXME */ | |
4225 | wstat = (SIGSTOP << 8) | 0177; | |
4226 | break; | |
4227 | #else | |
4228 | if (retry < 5) | |
4229 | { | |
a3f17187 | 4230 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4231 | pi->status_valid = 0; |
4232 | goto wait_again; | |
4233 | } | |
4234 | else | |
4235 | { | |
4236 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4237 | temp_tid = proc_get_current_thread (pi); |
4238 | if (!find_procinfo (pi->pid, temp_tid)) | |
4239 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4240 | |
4241 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4242 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4243 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4244 | add_thread (temp_ptid); |
c3f6f71d JM |
4245 | |
4246 | status->kind = TARGET_WAITKIND_STOPPED; | |
4247 | status->value.sig = 0; | |
4248 | return retval; | |
4249 | } | |
4250 | #endif | |
4251 | case PR_JOBCONTROL: | |
4252 | wstat = (what << 8) | 0177; | |
4253 | break; | |
4254 | case PR_FAULTED: | |
7af6341f | 4255 | switch (what) { |
c3f6f71d JM |
4256 | #ifdef FLTWATCH |
4257 | case FLTWATCH: | |
4258 | wstat = (SIGTRAP << 8) | 0177; | |
4259 | break; | |
4260 | #endif | |
4261 | #ifdef FLTKWATCH | |
4262 | case FLTKWATCH: | |
4263 | wstat = (SIGTRAP << 8) | 0177; | |
4264 | break; | |
4265 | #endif | |
4266 | /* FIXME: use si_signo where possible. */ | |
4267 | case FLTPRIV: | |
4268 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4269 | case FLTILL: | |
4270 | #endif | |
4271 | wstat = (SIGILL << 8) | 0177; | |
4272 | break; | |
4273 | case FLTBPT: | |
4274 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4275 | case FLTTRACE: | |
4276 | #endif | |
9185ddce JB |
4277 | /* If we hit our __dbx_link() internal breakpoint, |
4278 | then remove it. See comments in procfs_init_inferior() | |
4279 | for more details. */ | |
4280 | if (dbx_link_bpt_addr != 0 | |
4281 | && dbx_link_bpt_addr == read_pc ()) | |
4282 | remove_dbx_link_breakpoint (); | |
4283 | ||
c3f6f71d JM |
4284 | wstat = (SIGTRAP << 8) | 0177; |
4285 | break; | |
4286 | case FLTSTACK: | |
4287 | case FLTACCESS: | |
4288 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4289 | case FLTBOUNDS: | |
4290 | #endif | |
4291 | wstat = (SIGSEGV << 8) | 0177; | |
4292 | break; | |
4293 | case FLTIOVF: | |
4294 | case FLTIZDIV: | |
4295 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4296 | case FLTFPE: | |
4297 | #endif | |
4298 | wstat = (SIGFPE << 8) | 0177; | |
4299 | break; | |
4300 | case FLTPAGE: /* Recoverable page fault */ | |
4301 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4302 | retval = pid_to_ptid (-1); |
c3f6f71d | 4303 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 4304 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4305 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4306 | error (_("... giving up...")); |
c3f6f71d JM |
4307 | break; |
4308 | } | |
4309 | break; /* case PR_FAULTED: */ | |
4310 | default: /* switch (why) unmatched */ | |
4311 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4312 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4313 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4314 | error (_("... giving up...")); |
c3f6f71d JM |
4315 | break; |
4316 | } | |
4317 | /* | |
4318 | * Got this far without error: | |
4319 | * If retval isn't in the threads database, add it. | |
4320 | */ | |
39f77062 KB |
4321 | if (PIDGET (retval) > 0 && |
4322 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4323 | !in_thread_list (retval)) |
c906108c | 4324 | { |
c3f6f71d | 4325 | /* |
19958708 | 4326 | * We have a new thread. |
c3f6f71d | 4327 | * We need to add it both to GDB's list and to our own. |
19958708 | 4328 | * If we don't create a procinfo, resume may be unhappy |
c3f6f71d JM |
4329 | * later. |
4330 | */ | |
c3f6f71d JM |
4331 | add_thread (retval); |
4332 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4333 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4334 | } |
c906108c | 4335 | } |
c3f6f71d | 4336 | else /* flags do not indicate STOPPED */ |
c906108c | 4337 | { |
c3f6f71d JM |
4338 | /* surely this can't happen... */ |
4339 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4340 | __LINE__); | |
4341 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4342 | error (_("procfs: ...giving up...")); |
c906108c | 4343 | } |
c906108c | 4344 | } |
c906108c | 4345 | |
c3f6f71d JM |
4346 | if (status) |
4347 | store_waitstatus (status, wstat); | |
c906108c SS |
4348 | } |
4349 | ||
c3f6f71d JM |
4350 | return retval; |
4351 | } | |
c906108c | 4352 | |
4e73f23d RM |
4353 | /* Perform a partial transfer to/from the specified object. For |
4354 | memory transfers, fall back to the old memory xfer functions. */ | |
4355 | ||
4356 | static LONGEST | |
4357 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4358 | const char *annex, gdb_byte *readbuf, |
4359 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4360 | { |
4361 | switch (object) | |
4362 | { | |
4363 | case TARGET_OBJECT_MEMORY: | |
4364 | if (readbuf) | |
0b62613e PA |
4365 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4366 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4367 | if (writebuf) |
0b62613e PA |
4368 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4369 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4370 | return -1; |
4371 | ||
4372 | #ifdef NEW_PROC_API | |
4373 | case TARGET_OBJECT_AUXV: | |
4374 | return procfs_xfer_auxv (ops, object, annex, readbuf, writebuf, | |
4375 | offset, len); | |
4376 | #endif | |
4377 | ||
4378 | default: | |
4379 | if (ops->beneath != NULL) | |
4380 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4381 | readbuf, writebuf, offset, len); | |
4382 | return -1; | |
4383 | } | |
4384 | } | |
4385 | ||
4386 | ||
d0849a9a KB |
4387 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4388 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4389 | otherwise transfer them from the target. TARGET is unused. | |
4390 | ||
4391 | The return value is 0 if an error occurred or no bytes were | |
4392 | transferred. Otherwise, it will be a positive value which | |
4393 | indicates the number of bytes transferred between gdb and the | |
4394 | target. (Note that the interface also makes provisions for | |
4395 | negative values, but this capability isn't implemented here.) */ | |
4396 | ||
c3f6f71d | 4397 | static int |
0b62613e | 4398 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4399 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4400 | { |
4401 | procinfo *pi; | |
4402 | int nbytes = 0; | |
c906108c | 4403 | |
c3f6f71d | 4404 | /* Find procinfo for main process */ |
39f77062 | 4405 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4406 | if (pi->as_fd == 0 && |
4407 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4408 | { |
c3f6f71d JM |
4409 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4410 | return 0; | |
c906108c | 4411 | } |
c906108c | 4412 | |
c3f6f71d | 4413 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4414 | { |
c3f6f71d | 4415 | if (dowrite) |
c906108c | 4416 | { |
c3f6f71d JM |
4417 | #ifdef NEW_PROC_API |
4418 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4419 | #else |
c3f6f71d | 4420 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4421 | #endif |
c3f6f71d | 4422 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4423 | } |
c3f6f71d | 4424 | else |
c906108c | 4425 | { |
c3f6f71d JM |
4426 | PROCFS_NOTE ("read memory: \n"); |
4427 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4428 | } |
c3f6f71d | 4429 | if (nbytes < 0) |
c906108c | 4430 | { |
c3f6f71d | 4431 | nbytes = 0; |
c906108c | 4432 | } |
c906108c | 4433 | } |
c3f6f71d | 4434 | return nbytes; |
c906108c SS |
4435 | } |
4436 | ||
4437 | /* | |
c3f6f71d JM |
4438 | * Function: invalidate_cache |
4439 | * | |
4440 | * Called by target_resume before making child runnable. | |
4441 | * Mark cached registers and status's invalid. | |
4442 | * If there are "dirty" caches that need to be written back | |
4443 | * to the child process, do that. | |
4444 | * | |
19958708 | 4445 | * File descriptors are also cached. |
c3f6f71d JM |
4446 | * As they are a limited resource, we cannot hold onto them indefinitely. |
4447 | * However, as they are expensive to open, we don't want to throw them | |
4448 | * away indescriminately either. As a compromise, we will keep the | |
4449 | * file descriptors for the parent process, but discard any file | |
4450 | * descriptors we may have accumulated for the threads. | |
4451 | * | |
4452 | * Return value: | |
19958708 | 4453 | * As this function is called by iterate_over_threads, it always |
c3f6f71d | 4454 | * returns zero (so that iterate_over_threads will keep iterating). |
c906108c SS |
4455 | */ |
4456 | ||
c3f6f71d JM |
4457 | |
4458 | static int | |
fba45db2 | 4459 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4460 | { |
c3f6f71d JM |
4461 | /* |
4462 | * About to run the child; invalidate caches and do any other cleanup. | |
4463 | */ | |
c906108c | 4464 | |
c3f6f71d JM |
4465 | #if 0 |
4466 | if (pi->gregs_dirty) | |
4467 | if (parent == NULL || | |
4468 | proc_get_current_thread (parent) != pi->tid) | |
4469 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4470 | proc_warn (pi, "target_resume, set_gregs", | |
4471 | __LINE__); | |
3e8c568d | 4472 | if (gdbarch_fp0_regnum (current_gdbarch) >= 0) |
60054393 MS |
4473 | if (pi->fpregs_dirty) |
4474 | if (parent == NULL || | |
4475 | proc_get_current_thread (parent) != pi->tid) | |
4476 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4477 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4478 | __LINE__); |
c906108c | 4479 | #endif |
c906108c | 4480 | |
c3f6f71d | 4481 | if (parent != NULL) |
c906108c | 4482 | { |
c3f6f71d | 4483 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4484 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4485 | We don't do this to the master (parent) procinfo. */ |
4486 | ||
4487 | close_procinfo_files (pi); | |
c906108c | 4488 | } |
c3f6f71d JM |
4489 | pi->gregs_valid = 0; |
4490 | pi->fpregs_valid = 0; | |
4491 | #if 0 | |
4492 | pi->gregs_dirty = 0; | |
4493 | pi->fpregs_dirty = 0; | |
c906108c | 4494 | #endif |
c3f6f71d JM |
4495 | pi->status_valid = 0; |
4496 | pi->threads_valid = 0; | |
c906108c | 4497 | |
c3f6f71d | 4498 | return 0; |
c906108c SS |
4499 | } |
4500 | ||
0fda6bd2 | 4501 | #if 0 |
c906108c | 4502 | /* |
c3f6f71d JM |
4503 | * Function: make_signal_thread_runnable |
4504 | * | |
4505 | * A callback function for iterate_over_threads. | |
4506 | * Find the asynchronous signal thread, and make it runnable. | |
4507 | * See if that helps matters any. | |
c906108c SS |
4508 | */ |
4509 | ||
c3f6f71d | 4510 | static int |
fba45db2 | 4511 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4512 | { |
c3f6f71d JM |
4513 | #ifdef PR_ASLWP |
4514 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4515 | { |
c3f6f71d JM |
4516 | if (!proc_run_process (pi, 0, -1)) |
4517 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4518 | return 1; | |
c906108c | 4519 | } |
c906108c | 4520 | #endif |
c3f6f71d | 4521 | return 0; |
c906108c | 4522 | } |
0fda6bd2 | 4523 | #endif |
c906108c SS |
4524 | |
4525 | /* | |
c3f6f71d JM |
4526 | * Function: target_resume |
4527 | * | |
4528 | * Make the child process runnable. Normally we will then call | |
4529 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4530 | * | |
4531 | * Arguments: | |
19958708 | 4532 | * step: if true, then arrange for the child to stop again |
c3f6f71d JM |
4533 | * after executing a single instruction. |
4534 | * signo: if zero, then cancel any pending signal. | |
19958708 | 4535 | * If non-zero, then arrange for the indicated signal |
c3f6f71d JM |
4536 | * to be delivered to the child when it runs. |
4537 | * pid: if -1, then allow any child thread to run. | |
4538 | * if non-zero, then allow only the indicated thread to run. | |
4539 | ******* (not implemented yet) | |
c906108c SS |
4540 | */ |
4541 | ||
4542 | static void | |
28439f5e PA |
4543 | procfs_resume (struct target_ops *ops, |
4544 | ptid_t ptid, int step, enum target_signal signo) | |
c906108c | 4545 | { |
c3f6f71d JM |
4546 | procinfo *pi, *thread; |
4547 | int native_signo; | |
4548 | ||
19958708 | 4549 | /* 2.1: |
c3f6f71d | 4550 | prrun.prflags |= PRSVADDR; |
19958708 | 4551 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4552 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4553 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4554 | prrun.prflags |= PRCFAULT; clear current fault. |
4555 | ||
4556 | PRSTRACE and PRSFAULT can be done by other means | |
4557 | (proc_trace_signals, proc_trace_faults) | |
4558 | PRSVADDR is unnecessary. | |
4559 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4560 | This basically leaves PRSTEP and PRCSIG. | |
4561 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4562 | So basically PR_STEP is the sole argument that must be passed | |
4563 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4564 | ||
4565 | /* Find procinfo for main process */ | |
39f77062 | 4566 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4567 | |
4568 | /* First cut: ignore pid argument */ | |
4569 | errno = 0; | |
c906108c | 4570 | |
c3f6f71d JM |
4571 | /* Convert signal to host numbering. */ |
4572 | if (signo == 0 || | |
0fda6bd2 | 4573 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4574 | native_signo = 0; |
4575 | else | |
4576 | native_signo = target_signal_to_host (signo); | |
c906108c | 4577 | |
c3f6f71d | 4578 | pi->ignore_next_sigstop = 0; |
c906108c | 4579 | |
c3f6f71d JM |
4580 | /* Running the process voids all cached registers and status. */ |
4581 | /* Void the threads' caches first */ | |
19958708 | 4582 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4583 | /* Void the process procinfo's caches. */ |
4584 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4585 | |
39f77062 | 4586 | if (PIDGET (ptid) != -1) |
c906108c | 4587 | { |
c3f6f71d | 4588 | /* Resume a specific thread, presumably suppressing the others. */ |
39f77062 | 4589 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4590 | if (thread != NULL) |
c906108c | 4591 | { |
c3f6f71d JM |
4592 | if (thread->tid != 0) |
4593 | { | |
4594 | /* We're to resume a specific thread, and not the others. | |
4595 | * Set the child process's PR_ASYNC flag. | |
4596 | */ | |
4597 | #ifdef PR_ASYNC | |
4598 | if (!proc_set_async (pi)) | |
4599 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4600 | #endif | |
4601 | #if 0 | |
19958708 | 4602 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4603 | make_signal_thread_runnable, |
4604 | NULL); | |
4605 | #endif | |
4606 | pi = thread; /* substitute the thread's procinfo for run */ | |
4607 | } | |
c906108c SS |
4608 | } |
4609 | } | |
c906108c | 4610 | |
c3f6f71d | 4611 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4612 | { |
c3f6f71d | 4613 | if (errno == EBUSY) |
8a3fe4f8 | 4614 | warning (_("resume: target already running. Pretend to resume, and hope for the best!")); |
c3f6f71d JM |
4615 | else |
4616 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4617 | } |
c3f6f71d | 4618 | } |
c906108c | 4619 | |
c3f6f71d JM |
4620 | /* |
4621 | * Function: register_gdb_signals | |
4622 | * | |
19958708 | 4623 | * Traverse the list of signals that GDB knows about |
c3f6f71d JM |
4624 | * (see "handle" command), and arrange for the target |
4625 | * to be stopped or not, according to these settings. | |
4626 | * | |
4627 | * Returns non-zero for success, zero for failure. | |
4628 | */ | |
c906108c | 4629 | |
c3f6f71d | 4630 | static int |
37de36c6 | 4631 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4632 | { |
4633 | int signo; | |
c906108c | 4634 | |
c3f6f71d JM |
4635 | for (signo = 0; signo < NSIG; signo ++) |
4636 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4637 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4638 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4639 | prdelset (signals, signo); | |
4640 | else | |
4641 | praddset (signals, signo); | |
c906108c | 4642 | |
c3f6f71d | 4643 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4644 | } |
4645 | ||
4646 | /* | |
c3f6f71d JM |
4647 | * Function: target_notice_signals |
4648 | * | |
4649 | * Set up to trace signals in the child process. | |
4650 | */ | |
c906108c | 4651 | |
c3f6f71d | 4652 | static void |
39f77062 | 4653 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4654 | { |
37de36c6 | 4655 | gdb_sigset_t signals; |
39f77062 | 4656 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4657 | |
c3f6f71d JM |
4658 | if (proc_get_traced_signals (pi, &signals) && |
4659 | register_gdb_signals (pi, &signals)) | |
4660 | return; | |
4661 | else | |
4662 | proc_error (pi, "notice_signals", __LINE__); | |
4663 | } | |
c906108c | 4664 | |
c3f6f71d JM |
4665 | /* |
4666 | * Function: target_files_info | |
4667 | * | |
4668 | * Print status information about the child process. | |
4669 | */ | |
c906108c | 4670 | |
c3f6f71d | 4671 | static void |
fba45db2 | 4672 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4673 | { |
181e7f93 | 4674 | struct inferior *inf = current_inferior (); |
a3f17187 | 4675 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4676 | inf->attach_flag? "attached": "child", |
39f77062 | 4677 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4678 | } |
c906108c | 4679 | |
c3f6f71d JM |
4680 | /* |
4681 | * Function: target_stop | |
4682 | * | |
4683 | * Stop the child process asynchronously, as when the | |
4684 | * gdb user types control-c or presses a "stop" button. | |
4685 | * | |
4686 | * Works by sending kill(SIGINT) to the child's process group. | |
4687 | */ | |
c906108c | 4688 | |
c3f6f71d | 4689 | static void |
f9c72d52 | 4690 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4691 | { |
c3f6f71d | 4692 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4693 | } |
4694 | ||
c906108c | 4695 | /* |
c3f6f71d JM |
4696 | * Function: unconditionally_kill_inferior |
4697 | * | |
4698 | * Make it die. Wait for it to die. Clean up after it. | |
19958708 | 4699 | * Note: this should only be applied to the real process, |
c3f6f71d JM |
4700 | * not to an LWP, because of the check for parent-process. |
4701 | * If we need this to work for an LWP, it needs some more logic. | |
4702 | */ | |
c906108c | 4703 | |
c3f6f71d | 4704 | static void |
fba45db2 | 4705 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4706 | { |
4707 | int parent_pid; | |
c906108c | 4708 | |
c3f6f71d JM |
4709 | parent_pid = proc_parent_pid (pi); |
4710 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4711 | /* FIXME: use access functions */ | |
4712 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4713 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4714 | file for the inferior. */ | |
4715 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4716 | { | |
4717 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4718 | } | |
4719 | #endif | |
4720 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4721 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4722 | to kill the inferior, otherwise it might remain stopped with a | |
4723 | pending SIGKILL. | |
4724 | We do not check the result of the PIOCSSIG, the inferior might have | |
4725 | died already. */ | |
4726 | { | |
37de36c6 | 4727 | gdb_siginfo_t newsiginfo; |
c906108c | 4728 | |
c3f6f71d JM |
4729 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4730 | newsiginfo.si_signo = SIGKILL; | |
4731 | newsiginfo.si_code = 0; | |
4732 | newsiginfo.si_errno = 0; | |
4733 | newsiginfo.si_pid = getpid (); | |
4734 | newsiginfo.si_uid = getuid (); | |
4735 | /* FIXME: use proc_set_current_signal */ | |
4736 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4737 | } | |
4738 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4739 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4740 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4741 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4742 | destroy_procinfo (pi); | |
c906108c | 4743 | |
c3f6f71d JM |
4744 | /* If pi is GDB's child, wait for it to die. */ |
4745 | if (parent_pid == getpid ()) | |
19958708 | 4746 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4747 | Should we check the returned event? */ |
4748 | { | |
0d06e24b | 4749 | #if 0 |
c3f6f71d | 4750 | int status, ret; |
c906108c | 4751 | |
c3f6f71d JM |
4752 | ret = waitpid (pi->pid, &status, 0); |
4753 | #else | |
4754 | wait (NULL); | |
4755 | #endif | |
4756 | } | |
4757 | } | |
c906108c | 4758 | |
c3f6f71d JM |
4759 | /* |
4760 | * Function: target_kill_inferior | |
4761 | * | |
4762 | * We're done debugging it, and we want it to go away. | |
4763 | * Then we want GDB to forget all about it. | |
c906108c SS |
4764 | */ |
4765 | ||
19958708 | 4766 | static void |
7d85a9c0 | 4767 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4768 | { |
39f77062 | 4769 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4770 | { |
4771 | /* Find procinfo for main process */ | |
39f77062 | 4772 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4773 | |
c3f6f71d JM |
4774 | if (pi) |
4775 | unconditionally_kill_inferior (pi); | |
4776 | target_mourn_inferior (); | |
c906108c | 4777 | } |
c3f6f71d JM |
4778 | } |
4779 | ||
4780 | /* | |
4781 | * Function: target_mourn_inferior | |
4782 | * | |
4783 | * Forget we ever debugged this thing! | |
4784 | */ | |
c906108c | 4785 | |
19958708 | 4786 | static void |
136d6dae | 4787 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4788 | { |
4789 | procinfo *pi; | |
c906108c | 4790 | |
39f77062 | 4791 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4792 | { |
4793 | /* Find procinfo for main process */ | |
39f77062 | 4794 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4795 | if (pi) |
4796 | destroy_procinfo (pi); | |
c906108c | 4797 | } |
28439f5e | 4798 | unpush_target (ops); |
8181d85f DJ |
4799 | |
4800 | if (dbx_link_bpt != NULL) | |
4801 | { | |
4802 | deprecated_remove_raw_breakpoint (dbx_link_bpt); | |
4803 | dbx_link_bpt_addr = 0; | |
4804 | dbx_link_bpt = NULL; | |
4805 | } | |
4806 | ||
c3f6f71d JM |
4807 | generic_mourn_inferior (); |
4808 | } | |
c906108c | 4809 | |
c3f6f71d JM |
4810 | /* |
4811 | * Function: init_inferior | |
4812 | * | |
19958708 | 4813 | * When GDB forks to create a runnable inferior process, |
c3f6f71d JM |
4814 | * this function is called on the parent side of the fork. |
4815 | * It's job is to do whatever is necessary to make the child | |
4816 | * ready to be debugged, and then wait for the child to synchronize. | |
4817 | */ | |
c906108c | 4818 | |
19958708 | 4819 | static void |
28439f5e | 4820 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4821 | { |
4822 | procinfo *pi; | |
37de36c6 | 4823 | gdb_sigset_t signals; |
c3f6f71d | 4824 | int fail; |
2689673f | 4825 | int lwpid; |
c906108c | 4826 | |
c3f6f71d JM |
4827 | /* This routine called on the parent side (GDB side) |
4828 | after GDB forks the inferior. */ | |
28439f5e | 4829 | push_target (ops); |
c906108c | 4830 | |
c3f6f71d JM |
4831 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4832 | perror ("procfs: out of memory in 'init_inferior'"); | |
4833 | ||
4834 | if (!open_procinfo_files (pi, FD_CTL)) | |
4835 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4836 | ||
4837 | /* | |
4838 | xmalloc // done | |
4839 | open_procinfo_files // done | |
4840 | link list // done | |
4841 | prfillset (trace) | |
4842 | procfs_notice_signals | |
4843 | prfillset (fault) | |
4844 | prdelset (FLTPAGE) | |
4845 | PIOCWSTOP | |
4846 | PIOCSFAULT | |
4847 | */ | |
4848 | ||
4849 | /* If not stopped yet, wait for it to stop. */ | |
4850 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4851 | !(proc_wait_for_stop (pi))) | |
4852 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4853 | ||
4854 | /* Save some of the /proc state to be restored if we detach. */ | |
4855 | /* FIXME: Why? In case another debugger was debugging it? | |
4856 | We're it's parent, for Ghu's sake! */ | |
4857 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4858 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4859 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4860 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4861 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4862 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4863 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4864 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4865 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4866 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4867 | ||
4868 | /* Register to trace selected signals in the child. */ | |
4869 | prfillset (&signals); | |
4870 | if (!register_gdb_signals (pi, &signals)) | |
4871 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4872 | ||
4873 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4874 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4875 | ||
0d06e24b JM |
4876 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4877 | and possibly even turning ON kill-on-last-close at this point. But | |
4878 | I can't make that change without careful testing which I don't have | |
4879 | time to do right now... */ | |
c3f6f71d JM |
4880 | /* Turn on run-on-last-close flag so that the child |
4881 | will die if GDB goes away for some reason. */ | |
4882 | if (!proc_set_run_on_last_close (pi)) | |
4883 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4884 | ||
2689673f PA |
4885 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4886 | lwpid = proc_get_current_thread (pi); | |
4887 | ||
4888 | /* Create a procinfo for the main lwp. */ | |
4889 | create_procinfo (pid, lwpid); | |
4890 | ||
4891 | /* We already have a main thread registered in the thread table at | |
4892 | this point, but it didn't have any lwp info yet. Notify the core | |
4893 | about it. This changes inferior_ptid as well. */ | |
4894 | thread_change_ptid (pid_to_ptid (pid), | |
4895 | MERGEPID (pid, lwpid)); | |
c906108c | 4896 | |
46ac7a5d AC |
4897 | /* Typically two, one trap to exec the shell, one to exec the |
4898 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4899 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4900 | |
4901 | #ifdef SYS_syssgi | |
4902 | /* On mips-irix, we need to stop the inferior early enough during | |
4903 | the startup phase in order to be able to load the shared library | |
4904 | symbols and insert the breakpoints that are located in these shared | |
4905 | libraries. Stopping at the program entry point is not good enough | |
4906 | because the -init code is executed before the execution reaches | |
4907 | that point. | |
4908 | ||
4909 | So what we need to do is to insert a breakpoint in the runtime | |
4910 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4911 | called by rld once all shared libraries have been mapped, but before | |
4912 | the -init code is executed. Unfortuantely, this is not straightforward, | |
4913 | as rld is not part of the executable we are running, and thus we need | |
4914 | the inferior to run until rld itself has been mapped in memory. | |
4915 | ||
4916 | For this, we trace all syssgi() syscall exit events. Each time | |
4917 | we detect such an event, we iterate over each text memory maps, | |
4918 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4919 | When found, we know that rld has been mapped, and that we can insert | |
4920 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4921 | has been inserted, the syssgi() notifications are no longer necessary, | |
4922 | so they should be canceled. */ | |
4923 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4924 | #endif |
c3f6f71d | 4925 | } |
c906108c | 4926 | |
c3f6f71d JM |
4927 | /* |
4928 | * Function: set_exec_trap | |
4929 | * | |
4930 | * When GDB forks to create a new process, this function is called | |
4931 | * on the child side of the fork before GDB exec's the user program. | |
4932 | * Its job is to make the child minimally debuggable, so that the | |
4933 | * parent GDB process can connect to the child and take over. | |
4934 | * This function should do only the minimum to make that possible, | |
4935 | * and to synchronize with the parent process. The parent process | |
4936 | * should take care of the details. | |
4937 | */ | |
4938 | ||
4939 | static void | |
fba45db2 | 4940 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4941 | { |
4942 | /* This routine called on the child side (inferior side) | |
4943 | after GDB forks the inferior. It must use only local variables, | |
4944 | because it may be sharing data space with its parent. */ | |
c906108c | 4945 | |
c3f6f71d | 4946 | procinfo *pi; |
37de36c6 | 4947 | sysset_t *exitset; |
c906108c | 4948 | |
c3f6f71d | 4949 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4950 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4951 | |
c3f6f71d JM |
4952 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4953 | { | |
4954 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4955 | gdb_flush (gdb_stderr); | |
4956 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4957 | _exit (127); | |
4958 | } | |
c906108c | 4959 | |
c3f6f71d JM |
4960 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4961 | /* OSF method for tracing exec syscalls. Quoting: | |
4962 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4963 | exits from exec system calls because of the user level loader. */ | |
4964 | /* FIXME: make nice and maybe move into an access function. */ | |
4965 | { | |
4966 | int prfs_flags; | |
c906108c | 4967 | |
c3f6f71d JM |
4968 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4969 | { | |
4970 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4971 | gdb_flush (gdb_stderr); | |
4972 | _exit (127); | |
4973 | } | |
4974 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4975 | |
c3f6f71d JM |
4976 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4977 | { | |
4978 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4979 | gdb_flush (gdb_stderr); | |
4980 | _exit (127); | |
4981 | } | |
4982 | } | |
4983 | #else /* not PRFS_STOPEXEC */ | |
4984 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4985 | /* GW: Rationale... | |
4986 | Not all systems with /proc have all the exec* syscalls with the same | |
4987 | names. On the SGI, for example, there is no SYS_exec, but there | |
4988 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4989 | |
37de36c6 KB |
4990 | exitset = sysset_t_alloc (pi); |
4991 | gdb_premptysysset (exitset); | |
c3f6f71d | 4992 | #ifdef SYS_exec |
37de36c6 | 4993 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4994 | #endif |
4995 | #ifdef SYS_execve | |
37de36c6 | 4996 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4997 | #endif |
4998 | #ifdef SYS_execv | |
37de36c6 | 4999 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 5000 | #endif |
37de36c6 KB |
5001 | #ifdef DYNAMIC_SYSCALLS |
5002 | { | |
5003 | int callnum = find_syscall (pi, "execve"); | |
5004 | ||
5005 | if (callnum >= 0) | |
5006 | gdb_praddsysset (exitset, callnum); | |
c906108c | 5007 | |
37de36c6 KB |
5008 | callnum = find_syscall (pi, "ra_execve"); |
5009 | if (callnum >= 0) | |
5010 | gdb_praddsysset (exitset, callnum); | |
5011 | } | |
5012 | #endif /* DYNAMIC_SYSCALLS */ | |
5013 | ||
5014 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 5015 | { |
c3f6f71d JM |
5016 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
5017 | gdb_flush (gdb_stderr); | |
5018 | _exit (127); | |
c906108c | 5019 | } |
c3f6f71d JM |
5020 | #endif /* PRFS_STOPEXEC */ |
5021 | ||
5022 | /* FIXME: should this be done in the parent instead? */ | |
5023 | /* Turn off inherit on fork flag so that all grand-children | |
5024 | of gdb start with tracing flags cleared. */ | |
5025 | if (!proc_unset_inherit_on_fork (pi)) | |
5026 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
5027 | ||
5028 | /* Turn off run on last close flag, so that the child process | |
5029 | cannot run away just because we close our handle on it. | |
5030 | We want it to wait for the parent to attach. */ | |
5031 | if (!proc_unset_run_on_last_close (pi)) | |
5032 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
5033 | ||
19958708 | 5034 | /* FIXME: No need to destroy the procinfo -- |
c3f6f71d JM |
5035 | we have our own address space, and we're about to do an exec! */ |
5036 | /*destroy_procinfo (pi);*/ | |
c906108c | 5037 | } |
c906108c | 5038 | |
c3f6f71d JM |
5039 | /* |
5040 | * Function: create_inferior | |
5041 | * | |
5042 | * This function is called BEFORE gdb forks the inferior process. | |
19958708 | 5043 | * Its only real responsibility is to set things up for the fork, |
c3f6f71d JM |
5044 | * and tell GDB which two functions to call after the fork (one |
5045 | * for the parent, and one for the child). | |
19958708 | 5046 | * |
c3f6f71d JM |
5047 | * This function does a complicated search for a unix shell program, |
5048 | * which it then uses to parse arguments and environment variables | |
5049 | * to be sent to the child. I wonder whether this code could not | |
5050 | * be abstracted out and shared with other unix targets such as | |
5051 | * infptrace? | |
5052 | */ | |
c906108c SS |
5053 | |
5054 | static void | |
136d6dae VP |
5055 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
5056 | char *allargs, char **env, int from_tty) | |
c906108c SS |
5057 | { |
5058 | char *shell_file = getenv ("SHELL"); | |
5059 | char *tryname; | |
28439f5e PA |
5060 | int pid; |
5061 | ||
c906108c SS |
5062 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
5063 | { | |
5064 | ||
5065 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
5066 | just do this the normal way (via execlp, which operates by |
5067 | attempting an exec for each element of the PATH until it | |
5068 | finds one which succeeds), then there will be an exec for | |
5069 | each failed attempt, each of which will cause a PR_SYSEXIT | |
5070 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
5071 | for these failed execs with the ones for successful execs | |
5072 | (whether the exec has succeeded is stored at that time in the | |
5073 | carry bit or some such architecture-specific and | |
5074 | non-ABI-specified place). | |
5075 | ||
5076 | So I can't think of anything better than to search the PATH | |
5077 | now. This has several disadvantages: (1) There is a race | |
5078 | condition; if we find a file now and it is deleted before we | |
5079 | exec it, we lose, even if the deletion leaves a valid file | |
5080 | further down in the PATH, (2) there is no way to know exactly | |
5081 | what an executable (in the sense of "capable of being | |
5082 | exec'd") file is. Using access() loses because it may lose | |
5083 | if the caller is the superuser; failing to use it loses if | |
5084 | there are ACLs or some such. */ | |
c906108c SS |
5085 | |
5086 | char *p; | |
5087 | char *p1; | |
5088 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 5089 | path is used from within GDB. */ |
c906108c SS |
5090 | char *path = getenv ("PATH"); |
5091 | int len; | |
5092 | struct stat statbuf; | |
5093 | ||
5094 | if (path == NULL) | |
5095 | path = "/bin:/usr/bin"; | |
5096 | ||
5097 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 5098 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
5099 | { |
5100 | p1 = strchr (p, ':'); | |
5101 | if (p1 != NULL) | |
5102 | len = p1 - p; | |
5103 | else | |
5104 | len = strlen (p); | |
5105 | strncpy (tryname, p, len); | |
5106 | tryname[len] = '\0'; | |
5107 | strcat (tryname, "/"); | |
5108 | strcat (tryname, shell_file); | |
5109 | if (access (tryname, X_OK) < 0) | |
5110 | continue; | |
5111 | if (stat (tryname, &statbuf) < 0) | |
5112 | continue; | |
5113 | if (!S_ISREG (statbuf.st_mode)) | |
5114 | /* We certainly need to reject directories. I'm not quite | |
5115 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
5116 | that people want to exec() these things. */ | |
5117 | continue; | |
5118 | break; | |
5119 | } | |
5120 | if (p == NULL) | |
5121 | /* Not found. This must be an error rather than merely passing | |
5122 | the file to execlp(), because execlp() would try all the | |
5123 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 5124 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 5125 | __LINE__, shell_file); |
c906108c SS |
5126 | |
5127 | shell_file = tryname; | |
5128 | } | |
5129 | ||
28439f5e PA |
5130 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
5131 | NULL, NULL, shell_file); | |
5132 | ||
5133 | procfs_init_inferior (ops, pid); | |
c906108c | 5134 | |
9185ddce JB |
5135 | #ifdef SYS_syssgi |
5136 | /* Make sure to cancel the syssgi() syscall-exit notifications. | |
5137 | They should normally have been removed by now, but they may still | |
5138 | be activated if the inferior doesn't use shared libraries, or if | |
5139 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
5140 | See procfs_init_inferior() for more details. */ | |
5141 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), | |
5142 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
5143 | #endif | |
c906108c SS |
5144 | } |
5145 | ||
c3f6f71d JM |
5146 | /* |
5147 | * Function: notice_thread | |
5148 | * | |
5149 | * Callback for find_new_threads. | |
5150 | * Calls "add_thread". | |
5151 | */ | |
c906108c | 5152 | |
c3f6f71d | 5153 | static int |
fba45db2 | 5154 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5155 | { |
39f77062 | 5156 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5157 | |
2689673f | 5158 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 5159 | add_thread (gdb_threadid); |
c906108c | 5160 | |
c3f6f71d JM |
5161 | return 0; |
5162 | } | |
5163 | ||
5164 | /* | |
5165 | * Function: target_find_new_threads | |
5166 | * | |
19958708 | 5167 | * Query all the threads that the target knows about, |
c3f6f71d JM |
5168 | * and give them back to GDB to add to its list. |
5169 | */ | |
5170 | ||
5171 | void | |
28439f5e | 5172 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
5173 | { |
5174 | procinfo *pi; | |
5175 | ||
5176 | /* Find procinfo for main process */ | |
39f77062 | 5177 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5178 | proc_update_threads (pi); |
5179 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5180 | } |
5181 | ||
19958708 | 5182 | /* |
c3f6f71d JM |
5183 | * Function: target_thread_alive |
5184 | * | |
5185 | * Return true if the thread is still 'alive'. | |
5186 | * | |
5187 | * This guy doesn't really seem to be doing his job. | |
5188 | * Got to investigate how to tell when a thread is really gone. | |
5189 | */ | |
c906108c | 5190 | |
c906108c | 5191 | static int |
28439f5e | 5192 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 5193 | { |
c3f6f71d JM |
5194 | int proc, thread; |
5195 | procinfo *pi; | |
c906108c | 5196 | |
39f77062 KB |
5197 | proc = PIDGET (ptid); |
5198 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5199 | /* If I don't know it, it ain't alive! */ |
5200 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5201 | return 0; | |
5202 | ||
5203 | /* If I can't get its status, it ain't alive! | |
5204 | What's more, I need to forget about it! */ | |
5205 | if (!proc_get_status (pi)) | |
5206 | { | |
5207 | destroy_procinfo (pi); | |
5208 | return 0; | |
5209 | } | |
5210 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5211 | return 1; | |
c906108c | 5212 | } |
c3f6f71d | 5213 | |
5240ceac | 5214 | /* Convert PTID to a string. Returns the string in a static buffer. */ |
c3f6f71d JM |
5215 | |
5216 | char * | |
117de6a9 | 5217 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5218 | { |
5219 | static char buf[80]; | |
c3f6f71d | 5220 | |
5240ceac MK |
5221 | if (TIDGET (ptid) == 0) |
5222 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5223 | else |
21749010 | 5224 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5225 | |
5226 | return buf; | |
c3f6f71d JM |
5227 | } |
5228 | ||
5229 | /* | |
5230 | * Function: procfs_set_watchpoint | |
5231 | * Insert a watchpoint | |
5232 | */ | |
5233 | ||
19958708 | 5234 | int |
39f77062 KB |
5235 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
5236 | int after) | |
c906108c | 5237 | { |
c3f6f71d | 5238 | #ifndef UNIXWARE |
37de36c6 | 5239 | #ifndef AIX5 |
c3f6f71d | 5240 | int pflags = 0; |
19958708 | 5241 | procinfo *pi; |
c3f6f71d | 5242 | |
19958708 | 5243 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5244 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d JM |
5245 | |
5246 | /* Translate from GDB's flags to /proc's */ | |
5247 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5248 | { |
c3f6f71d JM |
5249 | switch (rwflag) { /* FIXME: need an enum! */ |
5250 | case hw_write: /* default watchpoint (write) */ | |
5251 | pflags = WRITE_WATCHFLAG; | |
5252 | break; | |
5253 | case hw_read: /* read watchpoint */ | |
5254 | pflags = READ_WATCHFLAG; | |
5255 | break; | |
5256 | case hw_access: /* access watchpoint */ | |
5257 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5258 | break; | |
5259 | case hw_execute: /* execution HW breakpoint */ | |
5260 | pflags = EXEC_WATCHFLAG; | |
5261 | break; | |
5262 | default: /* Something weird. Return error. */ | |
c906108c | 5263 | return -1; |
c3f6f71d JM |
5264 | } |
5265 | if (after) /* Stop after r/w access is completed. */ | |
5266 | pflags |= AFTER_WATCHFLAG; | |
5267 | } | |
5268 | ||
5269 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5270 | { | |
5271 | if (errno == E2BIG) /* Typical error for no resources */ | |
5272 | return -1; /* fail */ | |
5273 | /* GDB may try to remove the same watchpoint twice. | |
5274 | If a remove request returns no match, don't error. */ | |
c906108c | 5275 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5276 | return 0; /* ignore */ |
5277 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5278 | } |
37de36c6 KB |
5279 | #endif /* AIX5 */ |
5280 | #endif /* UNIXWARE */ | |
c906108c SS |
5281 | return 0; |
5282 | } | |
5283 | ||
1e03ad20 KB |
5284 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5285 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5286 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5287 | far. | |
19958708 | 5288 | |
1e03ad20 KB |
5289 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5290 | procfs.c targets due to the fact that some of them still define | |
5291 | TARGET_CAN_USE_HARDWARE_WATCHPOINT. */ | |
5292 | ||
5293 | static int | |
5294 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5295 | { | |
5296 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS | |
5297 | return 0; | |
5298 | #else | |
5299 | /* Due to the way that proc_set_watchpoint() is implemented, host | |
5300 | and target pointers must be of the same size. If they are not, | |
5301 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5302 | fact that proc_set_watchpoint() calls |
5303 | procfs_address_to_host_pointer(); a close inspection of | |
5304 | procfs_address_to_host_pointer will reveal that an internal error | |
5305 | will be generated when the host and target pointer sizes are | |
5306 | different. */ | |
4e906f53 UW |
5307 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
5308 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) | |
1e03ad20 KB |
5309 | return 0; |
5310 | ||
5311 | /* Other tests here??? */ | |
5312 | ||
5313 | return 1; | |
5314 | #endif | |
5315 | } | |
5316 | ||
c3f6f71d JM |
5317 | /* |
5318 | * Function: stopped_by_watchpoint | |
5319 | * | |
5320 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5321 | * else returns zero. | |
5322 | */ | |
5323 | ||
c906108c | 5324 | int |
39f77062 | 5325 | procfs_stopped_by_watchpoint (ptid_t ptid) |
c906108c | 5326 | { |
c3f6f71d | 5327 | procinfo *pi; |
c906108c | 5328 | |
19958708 | 5329 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5330 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
aaeb7efa MS |
5331 | |
5332 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5333 | return 0; | |
5334 | ||
c3f6f71d | 5335 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5336 | { |
c3f6f71d | 5337 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5338 | { |
c906108c | 5339 | #ifdef FLTWATCH |
c3f6f71d JM |
5340 | if (proc_what (pi) == FLTWATCH) |
5341 | return 1; | |
c906108c SS |
5342 | #endif |
5343 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5344 | if (proc_what (pi) == FLTKWATCH) |
5345 | return 1; | |
c906108c | 5346 | #endif |
c3f6f71d | 5347 | } |
c906108c SS |
5348 | } |
5349 | return 0; | |
5350 | } | |
c906108c | 5351 | |
831e682e MS |
5352 | /* |
5353 | * Memory Mappings Functions: | |
5354 | */ | |
5355 | ||
19958708 | 5356 | /* |
831e682e MS |
5357 | * Function: iterate_over_mappings |
5358 | * | |
5359 | * Call a callback function once for each mapping, passing it the mapping, | |
5360 | * an optional secondary callback function, and some optional opaque data. | |
5361 | * Quit and return the first non-zero value returned from the callback. | |
5362 | * | |
5363 | * Arguments: | |
5364 | * pi -- procinfo struct for the process to be mapped. | |
5365 | * func -- callback function to be called by this iterator. | |
5366 | * data -- optional opaque data to be passed to the callback function. | |
5367 | * child_func -- optional secondary function pointer to be passed | |
5368 | * to the child function. | |
5369 | * | |
19958708 | 5370 | * Return: First non-zero return value from the callback function, |
831e682e MS |
5371 | * or zero. |
5372 | */ | |
5373 | ||
5374 | static int | |
19958708 RM |
5375 | iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data, |
5376 | int (*func) (struct prmap *map, | |
5377 | int (*child_func) (), | |
831e682e MS |
5378 | void *data)) |
5379 | { | |
5380 | char pathname[MAX_PROC_NAME_SIZE]; | |
5381 | struct prmap *prmaps; | |
5382 | struct prmap *prmap; | |
5383 | int funcstat; | |
5384 | int map_fd; | |
5385 | int nmap; | |
5386 | #ifdef NEW_PROC_API | |
5387 | struct stat sbuf; | |
5388 | #endif | |
5389 | ||
19958708 | 5390 | /* Get the number of mappings, allocate space, |
831e682e MS |
5391 | and read the mappings into prmaps. */ |
5392 | #ifdef NEW_PROC_API | |
5393 | /* Open map fd. */ | |
5394 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5395 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5396 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5397 | ||
5398 | /* Make sure it gets closed again. */ | |
5399 | make_cleanup_close (map_fd); | |
5400 | ||
19958708 | 5401 | /* Use stat to determine the file size, and compute |
831e682e MS |
5402 | the number of prmap_t objects it contains. */ |
5403 | if (fstat (map_fd, &sbuf) != 0) | |
5404 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5405 | ||
5406 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5407 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5408 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5409 | != (nmap * sizeof (*prmaps))) | |
5410 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5411 | #else | |
5412 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5413 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5414 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5415 | ||
5416 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5417 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5418 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5419 | #endif | |
5420 | ||
5421 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5422 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5423 | return funcstat; | |
5424 | ||
5425 | return 0; | |
5426 | } | |
5427 | ||
5428 | /* | |
5429 | * Function: solib_mappings_callback | |
5430 | * | |
19958708 RM |
5431 | * Calls the supplied callback function once for each mapped address |
5432 | * space in the process. The callback function receives an open | |
5433 | * file descriptor for the file corresponding to that mapped | |
5434 | * address space (if there is one), and the base address of the | |
831e682e MS |
5435 | * mapped space. Quit when the callback function returns a |
5436 | * nonzero value, or at teh end of the mappings. | |
5437 | * | |
5438 | * Returns: the first non-zero return value of the callback function, | |
5439 | * or zero. | |
5440 | */ | |
5441 | ||
19958708 | 5442 | int solib_mappings_callback (struct prmap *map, |
831e682e MS |
5443 | int (*func) (int, CORE_ADDR), |
5444 | void *data) | |
5445 | { | |
5446 | procinfo *pi = data; | |
5447 | int fd; | |
5448 | ||
5449 | #ifdef NEW_PROC_API | |
5450 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
5451 | ||
5452 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
5453 | return -1; /* sanity */ | |
5454 | ||
5455 | if (map->pr_mapname[0] == 0) | |
5456 | { | |
5457 | fd = -1; /* no map file */ | |
5458 | } | |
5459 | else | |
5460 | { | |
5461 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
5462 | /* Note: caller's responsibility to close this fd! */ | |
5463 | fd = open_with_retry (name, O_RDONLY); | |
5464 | /* Note: we don't test the above call for failure; | |
19958708 | 5465 | we just pass the FD on as given. Sometimes there is |
831e682e MS |
5466 | no file, so the open may return failure, but that's |
5467 | not a problem. */ | |
5468 | } | |
5469 | #else | |
5470 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
5471 | /* Note: we don't test the above call for failure; | |
19958708 | 5472 | we just pass the FD on as given. Sometimes there is |
831e682e MS |
5473 | no file, so the ioctl may return failure, but that's |
5474 | not a problem. */ | |
5475 | #endif | |
bf75638e | 5476 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); |
831e682e MS |
5477 | } |
5478 | ||
5479 | /* | |
5480 | * Function: proc_iterate_over_mappings | |
5481 | * | |
5482 | * Uses the unified "iterate_over_mappings" function | |
5483 | * to implement the exported interface to solib-svr4.c. | |
5484 | * | |
5485 | * Given a pointer to a function, call that function once for every | |
19958708 | 5486 | * mapped address space in the process. The callback function |
831e682e MS |
5487 | * receives an open file descriptor for the file corresponding to |
5488 | * that mapped address space (if there is one), and the base address | |
5489 | * of the mapped space. Quit when the callback function returns a | |
5490 | * nonzero value, or at teh end of the mappings. | |
5491 | * | |
5492 | * Returns: the first non-zero return value of the callback function, | |
5493 | * or zero. | |
5494 | */ | |
5495 | ||
5496 | int | |
5497 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) | |
5498 | { | |
5499 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5500 | ||
5501 | return iterate_over_mappings (pi, func, pi, solib_mappings_callback); | |
5502 | } | |
5503 | ||
be4d1333 MS |
5504 | /* |
5505 | * Function: find_memory_regions_callback | |
5506 | * | |
5507 | * Implements the to_find_memory_regions method. | |
5508 | * Calls an external function for each memory region. | |
5509 | * External function will have the signiture: | |
5510 | * | |
19958708 RM |
5511 | * int callback (CORE_ADDR vaddr, |
5512 | * unsigned long size, | |
5513 | * int read, int write, int execute, | |
be4d1333 MS |
5514 | * void *data); |
5515 | * | |
5516 | * Returns the integer value returned by the callback. | |
5517 | */ | |
5518 | ||
5519 | static int | |
19958708 RM |
5520 | find_memory_regions_callback (struct prmap *map, |
5521 | int (*func) (CORE_ADDR, | |
5522 | unsigned long, | |
5523 | int, int, int, | |
be4d1333 MS |
5524 | void *), |
5525 | void *data) | |
5526 | { | |
bf75638e | 5527 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5528 | map->pr_size, |
be4d1333 MS |
5529 | (map->pr_mflags & MA_READ) != 0, |
5530 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5531 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5532 | data); |
5533 | } | |
5534 | ||
5535 | /* | |
5536 | * Function: proc_find_memory_regions | |
5537 | * | |
5538 | * External interface. Calls a callback function once for each | |
5539 | * mapped memory region in the child process, passing as arguments | |
5540 | * CORE_ADDR virtual_address, | |
19958708 | 5541 | * unsigned long size, |
be4d1333 MS |
5542 | * int read, TRUE if region is readable by the child |
5543 | * int write, TRUE if region is writable by the child | |
5544 | * int execute TRUE if region is executable by the child. | |
19958708 | 5545 | * |
be4d1333 MS |
5546 | * Stops iterating and returns the first non-zero value |
5547 | * returned by the callback. | |
5548 | */ | |
5549 | ||
5550 | static int | |
19958708 RM |
5551 | proc_find_memory_regions (int (*func) (CORE_ADDR, |
5552 | unsigned long, | |
5553 | int, int, int, | |
5554 | void *), | |
be4d1333 MS |
5555 | void *data) |
5556 | { | |
5557 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5558 | ||
19958708 | 5559 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5560 | find_memory_regions_callback); |
5561 | } | |
5562 | ||
9185ddce JB |
5563 | /* Remove the breakpoint that we inserted in __dbx_link(). |
5564 | Does nothing if the breakpoint hasn't been inserted or has already | |
5565 | been removed. */ | |
5566 | ||
5567 | static void | |
5568 | remove_dbx_link_breakpoint (void) | |
5569 | { | |
5570 | if (dbx_link_bpt_addr == 0) | |
5571 | return; | |
5572 | ||
8181d85f | 5573 | if (deprecated_remove_raw_breakpoint (dbx_link_bpt) != 0) |
8a3fe4f8 | 5574 | warning (_("Unable to remove __dbx_link breakpoint.")); |
9185ddce JB |
5575 | |
5576 | dbx_link_bpt_addr = 0; | |
8181d85f | 5577 | dbx_link_bpt = NULL; |
9185ddce JB |
5578 | } |
5579 | ||
5580 | /* Return the address of the __dbx_link() function in the file | |
5581 | refernced by ABFD by scanning its symbol table. Return 0 if | |
5582 | the symbol was not found. */ | |
5583 | ||
5584 | static CORE_ADDR | |
5585 | dbx_link_addr (bfd *abfd) | |
5586 | { | |
5587 | long storage_needed; | |
5588 | asymbol **symbol_table; | |
5589 | long number_of_symbols; | |
5590 | long i; | |
5591 | ||
5592 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
5593 | if (storage_needed <= 0) | |
5594 | return 0; | |
5595 | ||
5596 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
5597 | make_cleanup (xfree, symbol_table); | |
5598 | ||
5599 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
5600 | ||
5601 | for (i = 0; i < number_of_symbols; i++) | |
5602 | { | |
5603 | asymbol *sym = symbol_table[i]; | |
5604 | ||
5605 | if ((sym->flags & BSF_GLOBAL) | |
5606 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) | |
5607 | return (sym->value + sym->section->vma); | |
5608 | } | |
5609 | ||
5610 | /* Symbol not found, return NULL. */ | |
5611 | return 0; | |
5612 | } | |
5613 | ||
5614 | /* Search the symbol table of the file referenced by FD for a symbol | |
5615 | named __dbx_link(). If found, then insert a breakpoint at this location, | |
5616 | and return nonzero. Return zero otherwise. */ | |
5617 | ||
5618 | static int | |
5619 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
5620 | { | |
5621 | bfd *abfd; | |
5622 | long storage_needed; | |
5623 | CORE_ADDR sym_addr; | |
5624 | ||
5625 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
5626 | if (abfd == NULL) | |
5627 | { | |
8a3fe4f8 | 5628 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); |
9185ddce JB |
5629 | return 0; |
5630 | } | |
5631 | ||
5632 | if (!bfd_check_format (abfd, bfd_object)) | |
5633 | { | |
5634 | /* Not the correct format, so we can not possibly find the dbx_link | |
5635 | symbol in it. */ | |
5636 | bfd_close (abfd); | |
5637 | return 0; | |
5638 | } | |
5639 | ||
5640 | sym_addr = dbx_link_addr (abfd); | |
5641 | if (sym_addr != 0) | |
5642 | { | |
5643 | /* Insert the breakpoint. */ | |
5644 | dbx_link_bpt_addr = sym_addr; | |
8181d85f DJ |
5645 | dbx_link_bpt = deprecated_insert_raw_breakpoint (sym_addr); |
5646 | if (dbx_link_bpt == NULL) | |
9185ddce | 5647 | { |
8a3fe4f8 | 5648 | warning (_("Failed to insert dbx_link breakpoint.")); |
9185ddce JB |
5649 | bfd_close (abfd); |
5650 | return 0; | |
5651 | } | |
5652 | bfd_close (abfd); | |
5653 | return 1; | |
5654 | } | |
5655 | ||
5656 | bfd_close (abfd); | |
5657 | return 0; | |
5658 | } | |
5659 | ||
5660 | /* If the given memory region MAP contains a symbol named __dbx_link, | |
5661 | insert a breakpoint at this location and return nonzero. Return | |
5662 | zero otherwise. */ | |
5663 | ||
5664 | static int | |
5665 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
5666 | int (*child_func) (), | |
5667 | void *data) | |
5668 | { | |
5669 | procinfo *pi = (procinfo *) data; | |
5670 | ||
5671 | /* We know the symbol we're looking for is in a text region, so | |
5672 | only look for it if the region is a text one. */ | |
5673 | if (map->pr_mflags & MA_EXEC) | |
5674 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
5675 | ||
5676 | return 0; | |
5677 | } | |
5678 | ||
5679 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
5680 | insert a breakpoint at its location, and return nonzero. Return zero | |
5681 | otherwise. */ | |
5682 | ||
5683 | static int | |
5684 | insert_dbx_link_breakpoint (procinfo *pi) | |
5685 | { | |
5686 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
5687 | } | |
5688 | ||
388faa48 MS |
5689 | /* |
5690 | * Function: mappingflags | |
5691 | * | |
5692 | * Returns an ascii representation of a memory mapping's flags. | |
5693 | */ | |
c3f6f71d | 5694 | |
388faa48 | 5695 | static char * |
5ae5f592 | 5696 | mappingflags (long flags) |
388faa48 MS |
5697 | { |
5698 | static char asciiflags[8]; | |
5699 | ||
5700 | strcpy (asciiflags, "-------"); | |
5701 | #if defined (MA_PHYS) | |
5702 | if (flags & MA_PHYS) | |
5703 | asciiflags[0] = 'd'; | |
5704 | #endif | |
5705 | if (flags & MA_STACK) | |
5706 | asciiflags[1] = 's'; | |
5707 | if (flags & MA_BREAK) | |
5708 | asciiflags[2] = 'b'; | |
5709 | if (flags & MA_SHARED) | |
5710 | asciiflags[3] = 's'; | |
5711 | if (flags & MA_READ) | |
5712 | asciiflags[4] = 'r'; | |
5713 | if (flags & MA_WRITE) | |
5714 | asciiflags[5] = 'w'; | |
5715 | if (flags & MA_EXEC) | |
5716 | asciiflags[6] = 'x'; | |
5717 | return (asciiflags); | |
5718 | } | |
5719 | ||
831e682e MS |
5720 | /* |
5721 | * Function: info_mappings_callback | |
5722 | * | |
5723 | * Callback function, does the actual work for 'info proc mappings'. | |
5724 | */ | |
5725 | ||
831e682e MS |
5726 | static int |
5727 | info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused) | |
5728 | { | |
0b62613e | 5729 | unsigned int pr_off; |
831e682e | 5730 | |
831e682e | 5731 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5732 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5733 | #else |
0b62613e | 5734 | pr_off = map->pr_off; |
831e682e | 5735 | #endif |
0b62613e PA |
5736 | |
5737 | if (gdbarch_addr_bit (current_gdbarch) == 32) | |
f6a96b83 | 5738 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5739 | (unsigned long) map->pr_vaddr, |
5740 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5741 | (unsigned long) map->pr_size, |
0b62613e PA |
5742 | pr_off, |
5743 | mappingflags (map->pr_mflags)); | |
5744 | else | |
f6a96b83 | 5745 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5746 | (unsigned long) map->pr_vaddr, |
5747 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5748 | (unsigned long) map->pr_size, |
0b62613e PA |
5749 | pr_off, |
5750 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5751 | |
5752 | return 0; | |
5753 | } | |
5754 | ||
388faa48 MS |
5755 | /* |
5756 | * Function: info_proc_mappings | |
5757 | * | |
5758 | * Implement the "info proc mappings" subcommand. | |
5759 | */ | |
5760 | ||
5761 | static void | |
5762 | info_proc_mappings (procinfo *pi, int summary) | |
5763 | { | |
388faa48 MS |
5764 | if (summary) |
5765 | return; /* No output for summary mode. */ | |
5766 | ||
a3f17187 | 5767 | printf_filtered (_("Mapped address spaces:\n\n")); |
0b62613e PA |
5768 | if (gdbarch_ptr_bit (current_gdbarch) == 32) |
5769 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", | |
5770 | "Start Addr", | |
5771 | " End Addr", | |
5772 | " Size", | |
5773 | " Offset", | |
5774 | "Flags"); | |
5775 | else | |
5776 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5777 | "Start Addr", | |
5778 | " End Addr", | |
5779 | " Size", | |
5780 | " Offset", | |
5781 | "Flags"); | |
388faa48 | 5782 | |
831e682e | 5783 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5784 | printf_filtered ("\n"); |
5785 | } | |
5786 | ||
5787 | /* | |
5788 | * Function: info_proc_cmd | |
5789 | * | |
5790 | * Implement the "info proc" command. | |
5791 | */ | |
c3f6f71d JM |
5792 | |
5793 | static void | |
fba45db2 | 5794 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5795 | { |
c3f6f71d | 5796 | struct cleanup *old_chain; |
388faa48 MS |
5797 | procinfo *process = NULL; |
5798 | procinfo *thread = NULL; | |
5799 | char **argv = NULL; | |
5800 | char *tmp = NULL; | |
5801 | int pid = 0; | |
5802 | int tid = 0; | |
5803 | int mappings = 0; | |
c906108c | 5804 | |
c3f6f71d JM |
5805 | old_chain = make_cleanup (null_cleanup, 0); |
5806 | if (args) | |
0fda6bd2 | 5807 | { |
d1a41061 PP |
5808 | argv = gdb_buildargv (args); |
5809 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5810 | } |
c3f6f71d JM |
5811 | while (argv != NULL && *argv != NULL) |
5812 | { | |
5813 | if (isdigit (argv[0][0])) | |
5814 | { | |
5815 | pid = strtoul (argv[0], &tmp, 10); | |
5816 | if (*tmp == '/') | |
5817 | tid = strtoul (++tmp, NULL, 10); | |
5818 | } | |
5819 | else if (argv[0][0] == '/') | |
5820 | { | |
5821 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5822 | } | |
388faa48 MS |
5823 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5824 | { | |
5825 | mappings = 1; | |
5826 | } | |
c3f6f71d JM |
5827 | else |
5828 | { | |
5829 | /* [...] */ | |
5830 | } | |
5831 | argv++; | |
5832 | } | |
5833 | if (pid == 0) | |
39f77062 | 5834 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5835 | if (pid == 0) |
8a3fe4f8 | 5836 | error (_("No current process: you must name one.")); |
c3f6f71d | 5837 | else |
c906108c | 5838 | { |
c3f6f71d JM |
5839 | /* Have pid, will travel. |
5840 | First see if it's a process we're already debugging. */ | |
5841 | process = find_procinfo (pid, 0); | |
5842 | if (process == NULL) | |
5843 | { | |
19958708 | 5844 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5845 | remember to close it again when finished. */ |
5846 | process = create_procinfo (pid, 0); | |
004527cb | 5847 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5848 | if (!open_procinfo_files (process, FD_CTL)) |
5849 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5850 | } | |
c906108c | 5851 | } |
c3f6f71d JM |
5852 | if (tid != 0) |
5853 | thread = create_procinfo (pid, tid); | |
5854 | ||
5855 | if (process) | |
5856 | { | |
a3f17187 | 5857 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5858 | proc_prettyprint_flags (proc_flags (process), 1); |
5859 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5860 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5861 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5862 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5863 | proc_get_nthreads (process)); |
5864 | } | |
5865 | if (thread) | |
5866 | { | |
a3f17187 | 5867 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5868 | proc_prettyprint_flags (proc_flags (thread), 1); |
5869 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5870 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5871 | } | |
5872 | ||
388faa48 MS |
5873 | if (mappings) |
5874 | { | |
5875 | info_proc_mappings (process, 0); | |
5876 | } | |
5877 | ||
c3f6f71d | 5878 | do_cleanups (old_chain); |
c906108c SS |
5879 | } |
5880 | ||
9185ddce JB |
5881 | /* Modify the status of the system call identified by SYSCALLNUM in |
5882 | the set of syscalls that are currently traced/debugged. | |
5883 | ||
5884 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
5885 | will be updated. Otherwise, the exit syscalls set will be updated. | |
5886 | ||
5887 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they | |
5888 | will be disabled. */ | |
5889 | ||
5890 | static void | |
5891 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
5892 | int mode, int from_tty) | |
5893 | { | |
5894 | sysset_t *sysset; | |
5895 | ||
5896 | if (entry_or_exit == PR_SYSENTRY) | |
5897 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5898 | else | |
5899 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5900 | ||
5901 | if (sysset == NULL) | |
5902 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5903 | ||
5904 | if (mode == FLAG_SET) | |
5905 | gdb_praddsysset (sysset, syscallnum); | |
5906 | else | |
5907 | gdb_prdelsysset (sysset, syscallnum); | |
5908 | ||
5909 | if (entry_or_exit == PR_SYSENTRY) | |
5910 | { | |
5911 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5912 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5913 | } | |
5914 | else | |
5915 | { | |
5916 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5917 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5918 | } | |
5919 | } | |
5920 | ||
c3f6f71d | 5921 | static void |
fba45db2 | 5922 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5923 | { |
c3f6f71d | 5924 | procinfo *pi; |
c906108c | 5925 | |
39f77062 | 5926 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5927 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5928 | |
c3f6f71d | 5929 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5930 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5931 | |
39f77062 | 5932 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5933 | if (isdigit (args[0])) |
5934 | { | |
9185ddce | 5935 | const int syscallnum = atoi (args); |
c906108c | 5936 | |
9185ddce | 5937 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5938 | } |
5939 | } | |
5940 | ||
19958708 | 5941 | static void |
fba45db2 | 5942 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5943 | { |
c3f6f71d JM |
5944 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5945 | } | |
c906108c | 5946 | |
19958708 | 5947 | static void |
fba45db2 | 5948 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5949 | { |
5950 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5951 | } |
c906108c | 5952 | |
19958708 | 5953 | static void |
fba45db2 | 5954 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5955 | { |
5956 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5957 | } | |
5958 | ||
19958708 | 5959 | static void |
fba45db2 | 5960 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5961 | { |
c3f6f71d JM |
5962 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5963 | } | |
c906108c | 5964 | |
c906108c | 5965 | |
c906108c | 5966 | void |
fba45db2 | 5967 | _initialize_procfs (void) |
c906108c | 5968 | { |
28439f5e PA |
5969 | struct target_ops * t; |
5970 | ||
5971 | t = procfs_target (); | |
5972 | ||
5973 | add_target (t); | |
5974 | ||
1bedd215 AC |
5975 | add_info ("proc", info_proc_cmd, _("\ |
5976 | Show /proc process information about any running process.\n\ | |
388faa48 | 5977 | Specify process id, or use the program being debugged by default.\n\ |
1bedd215 | 5978 | Specify keyword 'mappings' for detailed info on memory mappings.")); |
19958708 | 5979 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5980 | _("Give a trace of entries into the syscall.")); |
19958708 | 5981 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5982 | _("Give a trace of exits from the syscall.")); |
19958708 | 5983 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5984 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5985 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5986 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5987 | } |
5988 | ||
5989 | /* =================== END, GDB "MODULE" =================== */ | |
5990 | ||
5991 | ||
5992 | ||
65554fef | 5993 | /* miscellaneous stubs: */ |
c3f6f71d JM |
5994 | /* The following satisfy a few random symbols mostly created by */ |
5995 | /* the solaris threads implementation, which I will chase down */ | |
5996 | /* later. */ | |
5997 | ||
5998 | /* | |
5999 | * Return a pid for which we guarantee | |
6000 | * we will be able to find a 'live' procinfo. | |
6001 | */ | |
6002 | ||
39f77062 | 6003 | ptid_t |
fba45db2 | 6004 | procfs_first_available (void) |
c3f6f71d | 6005 | { |
39f77062 | 6006 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 6007 | } |
be4d1333 | 6008 | |
2020b7ab PA |
6009 | static int |
6010 | find_signalled_thread (struct thread_info *info, void *data) | |
6011 | { | |
6012 | if (info->stop_signal != TARGET_SIGNAL_0 | |
6013 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) | |
6014 | return 1; | |
6015 | ||
6016 | return 0; | |
6017 | } | |
6018 | ||
6019 | static enum target_signal | |
6020 | find_stop_signal (void) | |
6021 | { | |
6022 | struct thread_info *info = | |
6023 | iterate_over_threads (find_signalled_thread, NULL); | |
6024 | ||
6025 | if (info) | |
6026 | return info->stop_signal; | |
6027 | else | |
6028 | return TARGET_SIGNAL_0; | |
6029 | } | |
6030 | ||
be4d1333 | 6031 | /* =================== GCORE .NOTE "MODULE" =================== */ |
65554fef MS |
6032 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
6033 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
6034 | |
6035 | static char * | |
19958708 | 6036 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
6037 | char *note_data, int *note_size, |
6038 | enum target_signal stop_signal) | |
be4d1333 | 6039 | { |
594f7785 | 6040 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
6041 | gdb_gregset_t gregs; |
6042 | gdb_fpregset_t fpregs; | |
6043 | unsigned long merged_pid; | |
6044 | ||
6045 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
6046 | ||
594f7785 | 6047 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
6048 | #if defined (UNIXWARE) |
6049 | note_data = (char *) elfcore_write_lwpstatus (obfd, | |
6050 | note_data, | |
6051 | note_size, | |
19958708 | 6052 | merged_pid, |
65554fef MS |
6053 | stop_signal, |
6054 | &gregs); | |
6055 | #else | |
be4d1333 | 6056 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
6057 | note_data, |
6058 | note_size, | |
19958708 | 6059 | merged_pid, |
be4d1333 | 6060 | stop_signal, |
65554fef MS |
6061 | &gregs); |
6062 | #endif | |
594f7785 | 6063 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
6064 | note_data = (char *) elfcore_write_prfpreg (obfd, |
6065 | note_data, | |
6066 | note_size, | |
6067 | &fpregs, | |
6068 | sizeof (fpregs)); | |
6069 | return note_data; | |
6070 | } | |
6071 | ||
6072 | struct procfs_corefile_thread_data { | |
6073 | bfd *obfd; | |
6074 | char *note_data; | |
6075 | int *note_size; | |
2020b7ab | 6076 | enum target_signal stop_signal; |
be4d1333 MS |
6077 | }; |
6078 | ||
6079 | static int | |
65554fef | 6080 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
6081 | { |
6082 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 6083 | |
2689673f | 6084 | if (pi != NULL) |
be4d1333 MS |
6085 | { |
6086 | ptid_t saved_ptid = inferior_ptid; | |
65554fef | 6087 | inferior_ptid = MERGEPID (pi->pid, thread->tid); |
19958708 RM |
6088 | args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid, |
6089 | args->note_data, | |
2020b7ab PA |
6090 | args->note_size, |
6091 | args->stop_signal); | |
be4d1333 MS |
6092 | inferior_ptid = saved_ptid; |
6093 | } | |
6094 | return 0; | |
6095 | } | |
6096 | ||
6097 | static char * | |
6098 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6099 | { | |
6100 | struct cleanup *old_chain; | |
6101 | gdb_gregset_t gregs; | |
6102 | gdb_fpregset_t fpregs; | |
6103 | char fname[16] = {'\0'}; | |
6104 | char psargs[80] = {'\0'}; | |
6105 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
6106 | char *note_data = NULL; | |
6dbdc4a3 | 6107 | char *inf_args; |
be4d1333 | 6108 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 6109 | gdb_byte *auxv; |
4e73f23d | 6110 | int auxv_len; |
be4d1333 MS |
6111 | |
6112 | if (get_exec_file (0)) | |
6113 | { | |
6114 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
19958708 | 6115 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 6116 | sizeof (psargs)); |
6dbdc4a3 MS |
6117 | |
6118 | inf_args = get_inferior_args (); | |
6119 | if (inf_args && *inf_args && | |
6120 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 6121 | { |
19958708 | 6122 | strncat (psargs, " ", |
be4d1333 | 6123 | sizeof (psargs) - strlen (psargs)); |
19958708 | 6124 | strncat (psargs, inf_args, |
be4d1333 MS |
6125 | sizeof (psargs) - strlen (psargs)); |
6126 | } | |
6127 | } | |
6128 | ||
19958708 RM |
6129 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
6130 | note_data, | |
6131 | note_size, | |
6132 | fname, | |
be4d1333 MS |
6133 | psargs); |
6134 | ||
65554fef | 6135 | #ifdef UNIXWARE |
594f7785 | 6136 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
6137 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
6138 | PIDGET (inferior_ptid), | |
65554fef MS |
6139 | stop_signal, &gregs); |
6140 | #endif | |
6141 | ||
be4d1333 MS |
6142 | thread_args.obfd = obfd; |
6143 | thread_args.note_data = note_data; | |
6144 | thread_args.note_size = note_size; | |
2020b7ab | 6145 | thread_args.stop_signal = find_stop_signal (); |
65554fef MS |
6146 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
6147 | ||
2689673f PA |
6148 | /* There should be always at least one thread. */ |
6149 | gdb_assert (thread_args.note_data != note_data); | |
6150 | note_data = thread_args.note_data; | |
be4d1333 | 6151 | |
13547ab6 DJ |
6152 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
6153 | NULL, &auxv); | |
4e73f23d RM |
6154 | if (auxv_len > 0) |
6155 | { | |
6156 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
6157 | "CORE", NT_AUXV, auxv, auxv_len); | |
6158 | xfree (auxv); | |
6159 | } | |
6160 | ||
be4d1333 MS |
6161 | make_cleanup (xfree, note_data); |
6162 | return note_data; | |
6163 | } | |
65554fef MS |
6164 | #else /* !(Solaris or Unixware) */ |
6165 | static char * | |
6166 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6167 | { | |
8a3fe4f8 | 6168 | error (_("gcore not implemented for this host.")); |
65554fef MS |
6169 | return NULL; /* lint */ |
6170 | } | |
6171 | #endif /* Solaris or Unixware */ | |
be4d1333 | 6172 | /* =================== END GCORE .NOTE "MODULE" =================== */ |