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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" |
c906108c | 32 | |
c3f6f71d JM |
33 | #if defined (NEW_PROC_API) |
34 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
35 | #endif | |
c906108c | 36 | |
c3f6f71d | 37 | #include <sys/procfs.h> |
37de36c6 | 38 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 39 | #include <sys/fault.h> |
37de36c6 KB |
40 | #endif |
41 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 42 | #include <sys/syscall.h> |
37de36c6 | 43 | #endif |
c3f6f71d | 44 | #include <sys/errno.h> |
2555fe1a | 45 | #include "gdb_wait.h" |
0fda6bd2 JM |
46 | #include <signal.h> |
47 | #include <ctype.h> | |
19958708 | 48 | #include "gdb_string.h" |
df8f7274 | 49 | #include "gdb_assert.h" |
44270758 | 50 | #include "inflow.h" |
4e73f23d | 51 | #include "auxv.h" |
0fda6bd2 | 52 | |
19958708 | 53 | /* |
c3f6f71d JM |
54 | * PROCFS.C |
55 | * | |
56 | * This module provides the interface between GDB and the | |
57 | * /proc file system, which is used on many versions of Unix | |
58 | * as a means for debuggers to control other processes. | |
59 | * Examples of the systems that use this interface are: | |
60 | * Irix | |
61 | * Solaris | |
62 | * OSF | |
63 | * Unixware | |
37de36c6 | 64 | * AIX5 |
c3f6f71d | 65 | * |
65554fef | 66 | * /proc works by imitating a file system: you open a simulated file |
c3f6f71d JM |
67 | * that represents the process you wish to interact with, and |
68 | * perform operations on that "file" in order to examine or change | |
69 | * the state of the other process. | |
70 | * | |
71 | * The most important thing to know about /proc and this module | |
72 | * is that there are two very different interfaces to /proc: | |
73 | * One that uses the ioctl system call, and | |
74 | * another that uses read and write system calls. | |
75 | * This module has to support both /proc interfaces. This means | |
76 | * that there are two different ways of doing every basic operation. | |
77 | * | |
19958708 | 78 | * In order to keep most of the code simple and clean, I have |
c3f6f71d JM |
79 | * defined an interface "layer" which hides all these system calls. |
80 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
81 | * and most or all occurrances of this ifdef should be confined to | |
82 | * this interface layer. | |
c906108c SS |
83 | */ |
84 | ||
85 | ||
c3f6f71d | 86 | /* Determine which /proc API we are using: |
19958708 | 87 | The ioctl API defines PIOCSTATUS, while |
c3f6f71d | 88 | the read/write (multiple fd) API never does. */ |
c906108c | 89 | |
c3f6f71d | 90 | #ifdef NEW_PROC_API |
c906108c | 91 | #include <sys/types.h> |
4b14d3e4 | 92 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 93 | #endif |
c906108c | 94 | |
c3f6f71d JM |
95 | #include <fcntl.h> /* for O_RDONLY */ |
96 | #include <unistd.h> /* for "X_OK" */ | |
97 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 98 | |
103b3ef5 MS |
99 | /* Note: procfs-utils.h must be included after the above system header |
100 | files, because it redefines various system calls using macros. | |
101 | This may be incompatible with the prototype declarations. */ | |
102 | ||
103b3ef5 MS |
103 | #include "proc-utils.h" |
104 | ||
c60c0f5f MS |
105 | /* Prototypes for supply_gregset etc. */ |
106 | #include "gregset.h" | |
107 | ||
c3f6f71d | 108 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 109 | |
c3f6f71d JM |
110 | /* |
111 | * This module defines the GDB target vector and its methods. | |
112 | */ | |
c906108c | 113 | |
8ab86381 | 114 | static void procfs_open (char *, int); |
136d6dae VP |
115 | static void procfs_attach (struct target_ops *, char *, int); |
116 | static void procfs_detach (struct target_ops *, char *, int); | |
39f77062 | 117 | static void procfs_resume (ptid_t, int, enum target_signal); |
a14ed312 | 118 | static int procfs_can_run (void); |
f9c72d52 | 119 | static void procfs_stop (ptid_t); |
a14ed312 | 120 | static void procfs_files_info (struct target_ops *); |
56be3814 UW |
121 | static void procfs_fetch_registers (struct regcache *, int); |
122 | static void procfs_store_registers (struct regcache *, int); | |
39f77062 | 123 | static void procfs_notice_signals (ptid_t); |
316f2060 | 124 | static void procfs_prepare_to_store (struct regcache *); |
a14ed312 | 125 | static void procfs_kill_inferior (void); |
136d6dae VP |
126 | static void procfs_mourn_inferior (struct target_ops *ops); |
127 | static void procfs_create_inferior (struct target_ops *, char *, | |
128 | char *, char **, int); | |
117de6a9 PA |
129 | static ptid_t procfs_wait (struct target_ops *, |
130 | ptid_t, struct target_waitstatus *); | |
0b62613e | 131 | static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
043780a1 AC |
132 | struct mem_attrib *attrib, |
133 | struct target_ops *); | |
4e73f23d RM |
134 | static LONGEST procfs_xfer_partial (struct target_ops *ops, |
135 | enum target_object object, | |
136 | const char *annex, | |
0b62613e | 137 | gdb_byte *readbuf, const gdb_byte *writebuf, |
4e73f23d | 138 | ULONGEST offset, LONGEST len); |
a14ed312 | 139 | |
39f77062 | 140 | static int procfs_thread_alive (ptid_t); |
a14ed312 KB |
141 | |
142 | void procfs_find_new_threads (void); | |
117de6a9 | 143 | char *procfs_pid_to_str (struct target_ops *, ptid_t); |
c3f6f71d | 144 | |
19958708 RM |
145 | static int proc_find_memory_regions (int (*) (CORE_ADDR, |
146 | unsigned long, | |
147 | int, int, int, | |
148 | void *), | |
be4d1333 MS |
149 | void *); |
150 | ||
151 | static char * procfs_make_note_section (bfd *, int *); | |
152 | ||
1e03ad20 KB |
153 | static int procfs_can_use_hw_breakpoint (int, int, int); |
154 | ||
c3f6f71d | 155 | struct target_ops procfs_ops; /* the target vector */ |
c906108c | 156 | |
c47ffbe3 VP |
157 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
158 | /* When GDB is built as 64-bit application on Solaris, the auxv data is | |
159 | presented in 64-bit format. We need to provide a custom parser to handle | |
160 | that. */ | |
161 | static int | |
162 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
163 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
164 | { | |
c47ffbe3 VP |
165 | gdb_byte *ptr = *readptr; |
166 | ||
167 | if (endptr == ptr) | |
168 | return 0; | |
169 | ||
170 | if (endptr - ptr < 8 * 2) | |
171 | return -1; | |
172 | ||
173 | *typep = extract_unsigned_integer (ptr, 4); | |
174 | ptr += 8; | |
175 | /* The size of data is always 64-bit. If the application is 32-bit, | |
176 | it will be zero extended, as expected. */ | |
177 | *valp = extract_unsigned_integer (ptr, 8); | |
178 | ptr += 8; | |
179 | ||
180 | *readptr = ptr; | |
181 | return 1; | |
182 | } | |
183 | #endif | |
184 | ||
c3f6f71d | 185 | static void |
fba45db2 | 186 | init_procfs_ops (void) |
c3f6f71d | 187 | { |
be4d1333 MS |
188 | procfs_ops.to_shortname = "procfs"; |
189 | procfs_ops.to_longname = "Unix /proc child process"; | |
19958708 | 190 | procfs_ops.to_doc = |
c3f6f71d | 191 | "Unix /proc child process (started by the \"run\" command)."; |
be4d1333 MS |
192 | procfs_ops.to_open = procfs_open; |
193 | procfs_ops.to_can_run = procfs_can_run; | |
194 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
195 | procfs_ops.to_kill = procfs_kill_inferior; | |
196 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
197 | procfs_ops.to_attach = procfs_attach; | |
198 | procfs_ops.to_detach = procfs_detach; | |
199 | procfs_ops.to_wait = procfs_wait; | |
200 | procfs_ops.to_resume = procfs_resume; | |
201 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
202 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
203 | procfs_ops.to_store_registers = procfs_store_registers; | |
4e73f23d | 204 | procfs_ops.to_xfer_partial = procfs_xfer_partial; |
c8e73a31 | 205 | procfs_ops.deprecated_xfer_memory = procfs_xfer_memory; |
be4d1333 MS |
206 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; |
207 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
208 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
209 | procfs_ops.to_files_info = procfs_files_info; | |
210 | procfs_ops.to_stop = procfs_stop; | |
211 | ||
212 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
213 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
c3f6f71d | 214 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
be4d1333 | 215 | procfs_ops.to_terminal_ours = terminal_ours; |
a790ad35 | 216 | procfs_ops.to_terminal_save_ours = terminal_save_ours; |
be4d1333 MS |
217 | procfs_ops.to_terminal_info = child_terminal_info; |
218 | ||
219 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
220 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
221 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
222 | ||
223 | procfs_ops.to_has_all_memory = 1; | |
224 | procfs_ops.to_has_memory = 1; | |
225 | procfs_ops.to_has_execution = 1; | |
226 | procfs_ops.to_has_stack = 1; | |
227 | procfs_ops.to_has_registers = 1; | |
228 | procfs_ops.to_stratum = process_stratum; | |
229 | procfs_ops.to_has_thread_control = tc_schedlock; | |
230 | procfs_ops.to_find_memory_regions = proc_find_memory_regions; | |
231 | procfs_ops.to_make_corefile_notes = procfs_make_note_section; | |
1e03ad20 | 232 | procfs_ops.to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
c47ffbe3 VP |
233 | |
234 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
235 | procfs_ops.to_auxv_parse = procfs_auxv_parse; | |
236 | #endif | |
237 | ||
be4d1333 | 238 | procfs_ops.to_magic = OPS_MAGIC; |
c3f6f71d | 239 | } |
c906108c | 240 | |
c3f6f71d JM |
241 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
242 | ||
c3f6f71d JM |
243 | /* |
244 | * World Unification: | |
245 | * | |
246 | * Put any typedefs, defines etc. here that are required for | |
247 | * the unification of code that handles different versions of /proc. | |
248 | */ | |
249 | ||
250 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 251 | #ifdef WA_READ |
19958708 | 252 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
253 | WRITE_WATCHFLAG = WA_WRITE, |
254 | EXEC_WATCHFLAG = WA_EXEC, | |
255 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
256 | }; | |
257 | #endif | |
258 | #else /* Irix method for watchpoints */ | |
19958708 | 259 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
260 | WRITE_WATCHFLAG = MA_WRITE, |
261 | EXEC_WATCHFLAG = MA_EXEC, | |
262 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
263 | }; | |
264 | #endif | |
265 | ||
37de36c6 KB |
266 | /* gdb_sigset_t */ |
267 | #ifdef HAVE_PR_SIGSET_T | |
268 | typedef pr_sigset_t gdb_sigset_t; | |
269 | #else | |
270 | typedef sigset_t gdb_sigset_t; | |
271 | #endif | |
272 | ||
273 | /* sigaction */ | |
274 | #ifdef HAVE_PR_SIGACTION64_T | |
275 | typedef pr_sigaction64_t gdb_sigaction_t; | |
276 | #else | |
277 | typedef struct sigaction gdb_sigaction_t; | |
278 | #endif | |
279 | ||
280 | /* siginfo */ | |
281 | #ifdef HAVE_PR_SIGINFO64_T | |
282 | typedef pr_siginfo64_t gdb_siginfo_t; | |
283 | #else | |
284 | typedef struct siginfo gdb_siginfo_t; | |
285 | #endif | |
286 | ||
287 | /* gdb_premptysysset */ | |
288 | #ifdef premptysysset | |
289 | #define gdb_premptysysset premptysysset | |
290 | #else | |
291 | #define gdb_premptysysset premptyset | |
292 | #endif | |
293 | ||
294 | /* praddsysset */ | |
295 | #ifdef praddsysset | |
296 | #define gdb_praddsysset praddsysset | |
297 | #else | |
298 | #define gdb_praddsysset praddset | |
299 | #endif | |
300 | ||
301 | /* prdelsysset */ | |
302 | #ifdef prdelsysset | |
303 | #define gdb_prdelsysset prdelsysset | |
304 | #else | |
305 | #define gdb_prdelsysset prdelset | |
306 | #endif | |
307 | ||
308 | /* prissyssetmember */ | |
309 | #ifdef prissyssetmember | |
310 | #define gdb_pr_issyssetmember prissyssetmember | |
311 | #else | |
312 | #define gdb_pr_issyssetmember prismember | |
313 | #endif | |
314 | ||
315 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
316 | as intuitively descriptive as it could be, so we'll define | |
317 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
318 | this writing, this feature is only found on AIX5 systems and | |
319 | basically means that the set of syscalls is not fixed. I.e, | |
320 | there's no nice table that one can #include to get all of the | |
321 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
322 | for each process. We are at least guaranteed that they won't | |
323 | change over the lifetime of the process. But each process could | |
324 | (in theory) have different syscall numbers. | |
325 | */ | |
326 | #ifdef HAVE_PRSYSENT_T | |
327 | #define DYNAMIC_SYSCALLS | |
328 | #endif | |
c3f6f71d JM |
329 | |
330 | ||
331 | ||
332 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
333 | ||
334 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
335 | ||
336 | /* The procinfo struct is a wrapper to hold all the state information | |
337 | concerning a /proc process. There should be exactly one procinfo | |
338 | for each process, and since GDB currently can debug only one | |
339 | process at a time, that means there should be only one procinfo. | |
340 | All of the LWP's of a process can be accessed indirectly thru the | |
341 | single process procinfo. | |
342 | ||
343 | However, against the day when GDB may debug more than one process, | |
344 | this data structure is kept in a list (which for now will hold no | |
345 | more than one member), and many functions will have a pointer to a | |
346 | procinfo as an argument. | |
347 | ||
348 | There will be a separate procinfo structure for use by the (not yet | |
349 | implemented) "info proc" command, so that we can print useful | |
350 | information about any random process without interfering with the | |
351 | inferior's procinfo information. */ | |
352 | ||
353 | #ifdef NEW_PROC_API | |
354 | /* format strings for /proc paths */ | |
355 | # ifndef CTL_PROC_NAME_FMT | |
356 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
357 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
358 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
359 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
360 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
361 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
362 | # endif | |
363 | /* the name of the proc status struct depends on the implementation */ | |
364 | typedef pstatus_t gdb_prstatus_t; | |
365 | typedef lwpstatus_t gdb_lwpstatus_t; | |
366 | #else /* ! NEW_PROC_API */ | |
367 | /* format strings for /proc paths */ | |
368 | # ifndef CTL_PROC_NAME_FMT | |
369 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
370 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
371 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
372 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
373 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
374 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
375 | # endif | |
c906108c | 376 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 377 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
378 | typedef prstatus_t gdb_lwpstatus_t; |
379 | #endif /* NEW_PROC_API */ | |
c906108c | 380 | |
c3f6f71d JM |
381 | typedef struct procinfo { |
382 | struct procinfo *next; | |
383 | int pid; /* Process ID */ | |
384 | int tid; /* Thread/LWP id */ | |
c906108c | 385 | |
c3f6f71d JM |
386 | /* process state */ |
387 | int was_stopped; | |
388 | int ignore_next_sigstop; | |
c906108c | 389 | |
19958708 | 390 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
391 | several different fd's, depending on the version of /proc |
392 | (old ioctl or new read/write). */ | |
c906108c | 393 | |
c3f6f71d JM |
394 | int ctl_fd; /* File descriptor for /proc control file */ |
395 | /* | |
396 | * The next three file descriptors are actually only needed in the | |
397 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
19958708 | 398 | * However, to avoid a bunch of #ifdefs in the code, we will use |
c3f6f71d JM |
399 | * them uniformly by (in the case of the ioctl single-file-descriptor |
400 | * implementation) filling them with copies of the control fd. | |
401 | */ | |
402 | int status_fd; /* File descriptor for /proc status file */ | |
403 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 404 | |
c3f6f71d | 405 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 406 | |
c3f6f71d | 407 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
408 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
409 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
410 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
411 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 412 | |
c3f6f71d | 413 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 414 | |
c3f6f71d JM |
415 | #ifndef NEW_PROC_API |
416 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 417 | #endif |
37de36c6 KB |
418 | |
419 | #ifdef DYNAMIC_SYSCALLS | |
420 | int num_syscalls; /* Total number of syscalls */ | |
421 | char **syscall_names; /* Syscall number to name map */ | |
422 | #endif | |
19958708 | 423 | |
c3f6f71d | 424 | struct procinfo *thread_list; |
c906108c | 425 | |
c3f6f71d JM |
426 | int status_valid : 1; |
427 | int gregs_valid : 1; | |
428 | int fpregs_valid : 1; | |
429 | int threads_valid: 1; | |
430 | } procinfo; | |
c906108c | 431 | |
c3f6f71d | 432 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 433 | |
c3f6f71d | 434 | /* Function prototypes for procinfo module: */ |
c906108c | 435 | |
a14ed312 KB |
436 | static procinfo *find_procinfo_or_die (int pid, int tid); |
437 | static procinfo *find_procinfo (int pid, int tid); | |
438 | static procinfo *create_procinfo (int pid, int tid); | |
439 | static void destroy_procinfo (procinfo * p); | |
004527cb | 440 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
441 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
442 | static int open_procinfo_files (procinfo * p, int which); | |
443 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
444 | static int sysset_t_size (procinfo *p); |
445 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
446 | #ifdef DYNAMIC_SYSCALLS | |
447 | static void load_syscalls (procinfo *pi); | |
448 | static void free_syscalls (procinfo *pi); | |
449 | static int find_syscall (procinfo *pi, char *name); | |
450 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 451 | |
c3f6f71d JM |
452 | /* The head of the procinfo list: */ |
453 | static procinfo * procinfo_list; | |
c906108c | 454 | |
c3f6f71d JM |
455 | /* |
456 | * Function: find_procinfo | |
457 | * | |
458 | * Search the procinfo list. | |
459 | * | |
460 | * Returns: pointer to procinfo, or NULL if not found. | |
461 | */ | |
c906108c | 462 | |
19958708 | 463 | static procinfo * |
fba45db2 | 464 | find_procinfo (int pid, int tid) |
c5aa993b | 465 | { |
c3f6f71d | 466 | procinfo *pi; |
c906108c | 467 | |
c3f6f71d JM |
468 | for (pi = procinfo_list; pi; pi = pi->next) |
469 | if (pi->pid == pid) | |
470 | break; | |
c906108c | 471 | |
c3f6f71d JM |
472 | if (pi) |
473 | if (tid) | |
474 | { | |
475 | /* Don't check threads_valid. If we're updating the | |
476 | thread_list, we want to find whatever threads are already | |
477 | here. This means that in general it is the caller's | |
478 | responsibility to check threads_valid and update before | |
479 | calling find_procinfo, if the caller wants to find a new | |
480 | thread. */ | |
481 | ||
482 | for (pi = pi->thread_list; pi; pi = pi->next) | |
483 | if (pi->tid == tid) | |
484 | break; | |
485 | } | |
c906108c | 486 | |
c3f6f71d JM |
487 | return pi; |
488 | } | |
c906108c | 489 | |
c3f6f71d JM |
490 | /* |
491 | * Function: find_procinfo_or_die | |
492 | * | |
493 | * Calls find_procinfo, but errors on failure. | |
494 | */ | |
c906108c | 495 | |
c3f6f71d | 496 | static procinfo * |
fba45db2 | 497 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
498 | { |
499 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 500 | |
c3f6f71d | 501 | if (pi == NULL) |
0fda6bd2 JM |
502 | { |
503 | if (tid) | |
8a3fe4f8 | 504 | error (_("procfs: couldn't find pid %d (kernel thread %d) in procinfo list."), |
0fda6bd2 JM |
505 | pid, tid); |
506 | else | |
8a3fe4f8 | 507 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 508 | } |
c3f6f71d JM |
509 | return pi; |
510 | } | |
c906108c | 511 | |
4d1bcd09 KB |
512 | /* open_with_retry() is a wrapper for open(). The appropriate |
513 | open() call is attempted; if unsuccessful, it will be retried as | |
514 | many times as needed for the EAGAIN and EINTR conditions. | |
19958708 | 515 | |
4d1bcd09 KB |
516 | For other conditions, open_with_retry() will retry the open() a |
517 | limited number of times. In addition, a short sleep is imposed | |
518 | prior to retrying the open(). The reason for this sleep is to give | |
519 | the kernel a chance to catch up and create the file in question in | |
520 | the event that GDB "wins" the race to open a file before the kernel | |
521 | has created it. */ | |
19958708 | 522 | |
4d1bcd09 KB |
523 | static int |
524 | open_with_retry (const char *pathname, int flags) | |
525 | { | |
526 | int retries_remaining, status; | |
527 | ||
528 | retries_remaining = 2; | |
529 | ||
530 | while (1) | |
531 | { | |
532 | status = open (pathname, flags); | |
533 | ||
534 | if (status >= 0 || retries_remaining == 0) | |
535 | break; | |
536 | else if (errno != EINTR && errno != EAGAIN) | |
537 | { | |
538 | retries_remaining--; | |
539 | sleep (1); | |
540 | } | |
541 | } | |
542 | ||
543 | return status; | |
544 | } | |
545 | ||
c3f6f71d JM |
546 | /* |
547 | * Function: open_procinfo_files | |
548 | * | |
549 | * Open the file descriptor for the process or LWP. | |
550 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
551 | * the others are opened lazily as needed. | |
552 | * else (if not NEW_PROC_API), there is only one real | |
553 | * file descriptor, but we keep multiple copies of it so that | |
554 | * the code that uses them does not have to be #ifdef'd. | |
555 | * | |
556 | * Return: file descriptor, or zero for failure. | |
557 | */ | |
c906108c | 558 | |
c3f6f71d | 559 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 560 | |
c3f6f71d | 561 | static int |
fba45db2 | 562 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 563 | { |
0fda6bd2 | 564 | #ifdef NEW_PROC_API |
c3f6f71d | 565 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 566 | #endif |
c3f6f71d JM |
567 | int fd; |
568 | ||
19958708 | 569 | /* |
c3f6f71d JM |
570 | * This function is getting ALMOST long enough to break up into several. |
571 | * Here is some rationale: | |
572 | * | |
573 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
19958708 | 574 | * There are several file descriptors that may need to be open |
c3f6f71d JM |
575 | * for any given process or LWP. The ones we're intereted in are: |
576 | * - control (ctl) write-only change the state | |
577 | * - status (status) read-only query the state | |
578 | * - address space (as) read/write access memory | |
579 | * - map (map) read-only virtual addr map | |
580 | * Most of these are opened lazily as they are needed. | |
19958708 | 581 | * The pathnames for the 'files' for an LWP look slightly |
c3f6f71d JM |
582 | * different from those of a first-class process: |
583 | * Pathnames for a process (<proc-id>): | |
584 | * /proc/<proc-id>/ctl | |
585 | * /proc/<proc-id>/status | |
586 | * /proc/<proc-id>/as | |
587 | * /proc/<proc-id>/map | |
588 | * Pathnames for an LWP (lwp-id): | |
589 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
590 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
591 | * An LWP has no map or address space file descriptor, since | |
592 | * the memory map and address space are shared by all LWPs. | |
593 | * | |
594 | * Everyone else (Solaris 2.5, Irix, OSF) | |
595 | * There is only one file descriptor for each process or LWP. | |
596 | * For convenience, we copy the same file descriptor into all | |
597 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
598 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
19958708 | 599 | * doesn't need any #ifdef's. |
c3f6f71d JM |
600 | * Pathname for all: |
601 | * /proc/<proc-id> | |
602 | * | |
603 | * Solaris 2.5 LWP's: | |
19958708 | 604 | * Each LWP has an independent file descriptor, but these |
c3f6f71d JM |
605 | * are not obtained via the 'open' system call like the rest: |
606 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
607 | * to the file descriptor of the parent process. | |
608 | * | |
609 | * OSF threads: | |
610 | * These do not even have their own independent file descriptor. | |
611 | * All operations are carried out on the file descriptor of the | |
612 | * parent process. Therefore we just call open again for each | |
613 | * thread, getting a new handle for the same 'file'. | |
614 | */ | |
615 | ||
616 | #ifdef NEW_PROC_API | |
617 | /* | |
618 | * In this case, there are several different file descriptors that | |
619 | * we might be asked to open. The control file descriptor will be | |
620 | * opened early, but the others will be opened lazily as they are | |
621 | * needed. | |
622 | */ | |
623 | ||
624 | strcpy (tmp, pi->pathname); | |
625 | switch (which) { /* which file descriptor to open? */ | |
626 | case FD_CTL: | |
627 | if (pi->tid) | |
628 | strcat (tmp, "/lwpctl"); | |
629 | else | |
630 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 631 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
632 | if (fd <= 0) |
633 | return 0; /* fail */ | |
634 | pi->ctl_fd = fd; | |
635 | break; | |
636 | case FD_AS: | |
637 | if (pi->tid) | |
638 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
639 | strcat (tmp, "/as"); | |
4d1bcd09 | 640 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
641 | if (fd <= 0) |
642 | return 0; /* fail */ | |
643 | pi->as_fd = fd; | |
644 | break; | |
645 | case FD_STATUS: | |
646 | if (pi->tid) | |
647 | strcat (tmp, "/lwpstatus"); | |
648 | else | |
649 | strcat (tmp, "/status"); | |
4d1bcd09 | 650 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
651 | if (fd <= 0) |
652 | return 0; /* fail */ | |
653 | pi->status_fd = fd; | |
654 | break; | |
655 | default: | |
656 | return 0; /* unknown file descriptor */ | |
657 | } | |
658 | #else /* not NEW_PROC_API */ | |
659 | /* | |
660 | * In this case, there is only one file descriptor for each procinfo | |
661 | * (ie. each process or LWP). In fact, only the file descriptor for | |
662 | * the process can actually be opened by an 'open' system call. | |
19958708 RM |
663 | * The ones for the LWPs have to be obtained thru an IOCTL call |
664 | * on the process's file descriptor. | |
c3f6f71d JM |
665 | * |
666 | * For convenience, we copy each procinfo's single file descriptor | |
19958708 | 667 | * into all of the fields occupied by the several file descriptors |
c3f6f71d JM |
668 | * of the NEW_PROC_API implementation. That way, the code that uses |
669 | * them can be written without ifdefs. | |
670 | */ | |
671 | ||
672 | ||
673 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
674 | /* Only one FD; just open it. */ |
675 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
676 | return 0; |
677 | #else /* Sol 2.5, Irix, other? */ | |
678 | if (pi->tid == 0) /* Master procinfo for the process */ | |
679 | { | |
4d1bcd09 | 680 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
681 | if (fd <= 0) |
682 | return 0; /* fail */ | |
683 | } | |
684 | else /* LWP thread procinfo */ | |
685 | { | |
686 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
687 | procinfo *process; | |
688 | int lwpid = pi->tid; | |
689 | ||
690 | /* Find the procinfo for the entire process. */ | |
691 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
692 | return 0; /* fail */ | |
693 | ||
694 | /* Now obtain the file descriptor for the LWP. */ | |
695 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
696 | return 0; /* fail */ | |
697 | #else /* Irix, other? */ | |
698 | return 0; /* Don't know how to open threads */ | |
699 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
700 | } | |
701 | #endif /* OSF PIOCTSTATUS */ | |
702 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
703 | #endif /* NEW_PROC_API */ | |
c906108c | 704 | |
c3f6f71d JM |
705 | return 1; /* success */ |
706 | } | |
c906108c | 707 | |
c3f6f71d JM |
708 | /* |
709 | * Function: create_procinfo | |
710 | * | |
711 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 712 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
713 | * |
714 | * Return: pointer to new procinfo struct. | |
715 | */ | |
c906108c | 716 | |
c3f6f71d | 717 | static procinfo * |
fba45db2 | 718 | create_procinfo (int pid, int tid) |
c3f6f71d | 719 | { |
0b62613e | 720 | procinfo *pi, *parent = NULL; |
c906108c | 721 | |
0d06e24b | 722 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 723 | return pi; /* Already exists, nothing to do. */ |
c906108c | 724 | |
c3f6f71d JM |
725 | /* find parent before doing malloc, to save having to cleanup */ |
726 | if (tid != 0) | |
727 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
728 | create it if it | |
729 | doesn't exist yet? */ | |
c906108c | 730 | |
c3f6f71d JM |
731 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
732 | memset (pi, 0, sizeof (procinfo)); | |
733 | pi->pid = pid; | |
734 | pi->tid = tid; | |
c906108c | 735 | |
37de36c6 KB |
736 | #ifdef DYNAMIC_SYSCALLS |
737 | load_syscalls (pi); | |
738 | #endif | |
739 | ||
1d5e0602 KB |
740 | pi->saved_entryset = sysset_t_alloc (pi); |
741 | pi->saved_exitset = sysset_t_alloc (pi); | |
742 | ||
c3f6f71d JM |
743 | /* Chain into list. */ |
744 | if (tid == 0) | |
745 | { | |
746 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
747 | pi->next = procinfo_list; | |
748 | procinfo_list = pi; | |
749 | } | |
750 | else | |
751 | { | |
752 | #ifdef NEW_PROC_API | |
753 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
754 | #else | |
755 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
756 | #endif | |
757 | pi->next = parent->thread_list; | |
758 | parent->thread_list = pi; | |
759 | } | |
760 | return pi; | |
761 | } | |
c906108c | 762 | |
c3f6f71d JM |
763 | /* |
764 | * Function: close_procinfo_files | |
765 | * | |
766 | * Close all file descriptors associated with the procinfo | |
767 | */ | |
c906108c | 768 | |
c3f6f71d | 769 | static void |
fba45db2 | 770 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
771 | { |
772 | if (pi->ctl_fd > 0) | |
773 | close (pi->ctl_fd); | |
774 | #ifdef NEW_PROC_API | |
775 | if (pi->as_fd > 0) | |
776 | close (pi->as_fd); | |
777 | if (pi->status_fd > 0) | |
778 | close (pi->status_fd); | |
779 | #endif | |
780 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
781 | } | |
c906108c | 782 | |
c3f6f71d JM |
783 | /* |
784 | * Function: destroy_procinfo | |
785 | * | |
786 | * Destructor function. Close, unlink and deallocate the object. | |
787 | */ | |
c906108c | 788 | |
c3f6f71d | 789 | static void |
fba45db2 | 790 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
791 | { |
792 | procinfo *ptr; | |
793 | ||
794 | /* Step one: unlink the procinfo from its list */ | |
795 | if (pi == *list) | |
796 | *list = pi->next; | |
19958708 | 797 | else |
c3f6f71d JM |
798 | for (ptr = *list; ptr; ptr = ptr->next) |
799 | if (ptr->next == pi) | |
800 | { | |
801 | ptr->next = pi->next; | |
802 | break; | |
803 | } | |
7a292a7a | 804 | |
c3f6f71d JM |
805 | /* Step two: close any open file descriptors */ |
806 | close_procinfo_files (pi); | |
7a292a7a | 807 | |
c3f6f71d | 808 | /* Step three: free the memory. */ |
37de36c6 KB |
809 | #ifdef DYNAMIC_SYSCALLS |
810 | free_syscalls (pi); | |
811 | #endif | |
1d5e0602 KB |
812 | xfree (pi->saved_entryset); |
813 | xfree (pi->saved_exitset); | |
b8c9b27d | 814 | xfree (pi); |
c3f6f71d | 815 | } |
c906108c | 816 | |
c3f6f71d | 817 | static void |
fba45db2 | 818 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
819 | { |
820 | procinfo *tmp; | |
c906108c | 821 | |
c3f6f71d JM |
822 | if (pi->tid != 0) /* destroy a thread procinfo */ |
823 | { | |
824 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
825 | destroy_one_procinfo (&tmp->thread_list, pi); | |
826 | } | |
827 | else /* destroy a process procinfo and all its threads */ | |
828 | { | |
829 | /* First destroy the children, if any; */ | |
830 | while (pi->thread_list != NULL) | |
831 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
832 | /* Then destroy the parent. Genocide!!! */ | |
833 | destroy_one_procinfo (&procinfo_list, pi); | |
834 | } | |
835 | } | |
c906108c | 836 | |
004527cb AC |
837 | static void |
838 | do_destroy_procinfo_cleanup (void *pi) | |
839 | { | |
840 | destroy_procinfo (pi); | |
841 | } | |
842 | ||
c3f6f71d | 843 | enum { NOKILL, KILL }; |
c906108c | 844 | |
c3f6f71d JM |
845 | /* |
846 | * Function: dead_procinfo | |
847 | * | |
848 | * To be called on a non_recoverable error for a procinfo. | |
849 | * Prints error messages, optionally sends a SIGKILL to the process, | |
850 | * then destroys the data structure. | |
851 | */ | |
c906108c | 852 | |
c3f6f71d | 853 | static void |
fba45db2 | 854 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
855 | { |
856 | char procfile[80]; | |
c906108c | 857 | |
c3f6f71d JM |
858 | if (pi->pathname) |
859 | { | |
860 | print_sys_errmsg (pi->pathname, errno); | |
861 | } | |
862 | else | |
863 | { | |
864 | sprintf (procfile, "process %d", pi->pid); | |
865 | print_sys_errmsg (procfile, errno); | |
866 | } | |
867 | if (kill_p == KILL) | |
868 | kill (pi->pid, SIGKILL); | |
c906108c | 869 | |
c3f6f71d | 870 | destroy_procinfo (pi); |
0b62613e | 871 | error ("%s", msg); |
c3f6f71d | 872 | } |
c906108c | 873 | |
37de36c6 KB |
874 | /* |
875 | * Function: sysset_t_size | |
876 | * | |
877 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
878 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
879 | * size of sysset_t isn't known until runtime. | |
880 | */ | |
881 | ||
882 | static int | |
883 | sysset_t_size (procinfo * pi) | |
884 | { | |
885 | #ifndef DYNAMIC_SYSCALLS | |
886 | return sizeof (sysset_t); | |
887 | #else | |
888 | return sizeof (sysset_t) - sizeof (uint64_t) | |
889 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
890 | / (8 * sizeof (uint64_t))); | |
891 | #endif | |
892 | } | |
893 | ||
894 | /* Function: sysset_t_alloc | |
19958708 | 895 | |
37de36c6 KB |
896 | Allocate and (partially) initialize a sysset_t struct. */ |
897 | ||
898 | static sysset_t * | |
899 | sysset_t_alloc (procinfo * pi) | |
900 | { | |
901 | sysset_t *ret; | |
902 | int size = sysset_t_size (pi); | |
903 | ret = xmalloc (size); | |
904 | #ifdef DYNAMIC_SYSCALLS | |
905 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
906 | / (8 * sizeof (uint64_t)); | |
907 | #endif | |
908 | return ret; | |
909 | } | |
910 | ||
911 | #ifdef DYNAMIC_SYSCALLS | |
912 | ||
913 | /* Function: load_syscalls | |
19958708 | 914 | |
37de36c6 KB |
915 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
916 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
917 | with the names. (Certain numbers may be skipped in which case the | |
918 | names for these numbers will be left as NULL.) */ | |
919 | ||
920 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
921 | #define MAX_SYSCALLS 65536 | |
922 | ||
923 | static void | |
924 | load_syscalls (procinfo *pi) | |
925 | { | |
926 | char pathname[MAX_PROC_NAME_SIZE]; | |
927 | int sysent_fd; | |
928 | prsysent_t header; | |
929 | prsyscall_t *syscalls; | |
930 | int i, size, maxcall; | |
931 | ||
932 | pi->num_syscalls = 0; | |
933 | pi->syscall_names = 0; | |
934 | ||
935 | /* Open the file descriptor for the sysent file */ | |
936 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 937 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
938 | if (sysent_fd < 0) |
939 | { | |
8a3fe4f8 | 940 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
941 | } |
942 | ||
943 | size = sizeof header - sizeof (prsyscall_t); | |
944 | if (read (sysent_fd, &header, size) != size) | |
945 | { | |
8a3fe4f8 | 946 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
947 | } |
948 | ||
949 | if (header.pr_nsyscalls == 0) | |
950 | { | |
8a3fe4f8 | 951 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); |
37de36c6 KB |
952 | } |
953 | ||
954 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
955 | syscalls = xmalloc (size); | |
956 | ||
957 | if (read (sysent_fd, syscalls, size) != size) | |
958 | { | |
959 | xfree (syscalls); | |
8a3fe4f8 | 960 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
961 | } |
962 | ||
963 | /* Find maximum syscall number. This may not be the same as | |
964 | pr_nsyscalls since that value refers to the number of entries | |
965 | in the table. (Also, the docs indicate that some system | |
966 | call numbers may be skipped.) */ | |
967 | ||
968 | maxcall = syscalls[0].pr_number; | |
969 | ||
970 | for (i = 1; i < header.pr_nsyscalls; i++) | |
971 | if (syscalls[i].pr_number > maxcall | |
972 | && syscalls[i].pr_nameoff > 0 | |
973 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
974 | maxcall = syscalls[i].pr_number; | |
975 | ||
976 | pi->num_syscalls = maxcall+1; | |
977 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
978 | ||
979 | for (i = 0; i < pi->num_syscalls; i++) | |
980 | pi->syscall_names[i] = NULL; | |
981 | ||
982 | /* Read the syscall names in */ | |
983 | for (i = 0; i < header.pr_nsyscalls; i++) | |
984 | { | |
985 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
986 | int nread; | |
987 | int callnum; | |
988 | ||
989 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
990 | || syscalls[i].pr_number < 0 | |
991 | || syscalls[i].pr_nameoff <= 0 | |
992 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
993 | != (off_t) syscalls[i].pr_nameoff)) | |
994 | continue; | |
995 | ||
996 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
997 | if (nread <= 0) | |
998 | continue; | |
999 | ||
1000 | callnum = syscalls[i].pr_number; | |
1001 | ||
1002 | if (pi->syscall_names[callnum] != NULL) | |
1003 | { | |
1004 | /* FIXME: Generate warning */ | |
1005 | continue; | |
1006 | } | |
1007 | ||
1008 | namebuf[nread-1] = '\0'; | |
1009 | size = strlen (namebuf) + 1; | |
1010 | pi->syscall_names[callnum] = xmalloc (size); | |
1011 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
1012 | pi->syscall_names[callnum][size-1] = '\0'; | |
1013 | } | |
19958708 | 1014 | |
37de36c6 KB |
1015 | close (sysent_fd); |
1016 | xfree (syscalls); | |
1017 | } | |
1018 | ||
1019 | /* Function: free_syscalls | |
19958708 | 1020 | |
37de36c6 KB |
1021 | Free the space allocated for the syscall names from the procinfo |
1022 | structure. */ | |
1023 | ||
1024 | static void | |
1025 | free_syscalls (procinfo *pi) | |
1026 | { | |
1027 | if (pi->syscall_names) | |
1028 | { | |
1029 | int i; | |
1030 | ||
1031 | for (i = 0; i < pi->num_syscalls; i++) | |
1032 | if (pi->syscall_names[i] != NULL) | |
1033 | xfree (pi->syscall_names[i]); | |
1034 | ||
1035 | xfree (pi->syscall_names); | |
1036 | pi->syscall_names = 0; | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | /* Function: find_syscall | |
1041 | ||
1042 | Given a name, look up (and return) the corresponding syscall number. | |
1043 | If no match is found, return -1. */ | |
19958708 | 1044 | |
37de36c6 KB |
1045 | static int |
1046 | find_syscall (procinfo *pi, char *name) | |
1047 | { | |
1048 | int i; | |
1049 | for (i = 0; i < pi->num_syscalls; i++) | |
1050 | { | |
1051 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1052 | return i; | |
1053 | } | |
1054 | return -1; | |
1055 | } | |
1056 | #endif | |
1057 | ||
c3f6f71d | 1058 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1059 | |
c3f6f71d | 1060 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1061 | |
c3f6f71d JM |
1062 | /* |
1063 | * This "module" is the interface layer between the /proc system API | |
19958708 | 1064 | * and the gdb target vector functions. This layer consists of |
c3f6f71d JM |
1065 | * access functions that encapsulate each of the basic operations |
1066 | * that we need to use from the /proc API. | |
1067 | * | |
1068 | * The main motivation for this layer is to hide the fact that | |
1069 | * there are two very different implementations of the /proc API. | |
1070 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1071 | * functions, we do our best to hide them all in here. | |
1072 | */ | |
c906108c | 1073 | |
a14ed312 KB |
1074 | int proc_get_status (procinfo * pi); |
1075 | long proc_flags (procinfo * pi); | |
1076 | int proc_why (procinfo * pi); | |
1077 | int proc_what (procinfo * pi); | |
1078 | int proc_set_run_on_last_close (procinfo * pi); | |
1079 | int proc_unset_run_on_last_close (procinfo * pi); | |
1080 | int proc_set_inherit_on_fork (procinfo * pi); | |
1081 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1082 | int proc_set_async (procinfo * pi); | |
1083 | int proc_unset_async (procinfo * pi); | |
1084 | int proc_stop_process (procinfo * pi); | |
1085 | int proc_trace_signal (procinfo * pi, int signo); | |
1086 | int proc_ignore_signal (procinfo * pi, int signo); | |
1087 | int proc_clear_current_fault (procinfo * pi); | |
1088 | int proc_set_current_signal (procinfo * pi, int signo); | |
1089 | int proc_clear_current_signal (procinfo * pi); | |
1090 | int proc_set_gregs (procinfo * pi); | |
1091 | int proc_set_fpregs (procinfo * pi); | |
1092 | int proc_wait_for_stop (procinfo * pi); | |
1093 | int proc_run_process (procinfo * pi, int step, int signo); | |
1094 | int proc_kill (procinfo * pi, int signo); | |
1095 | int proc_parent_pid (procinfo * pi); | |
1096 | int proc_get_nthreads (procinfo * pi); | |
1097 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1098 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1099 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1100 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1101 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1102 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1103 | |
1104 | int proc_update_threads (procinfo * pi); | |
1105 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1106 | int (*func) (procinfo *, procinfo *, void *), |
1107 | void *ptr); | |
a14ed312 KB |
1108 | |
1109 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1110 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1111 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1112 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1113 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1114 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1115 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1116 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1117 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1118 | |
1119 | void proc_warn (procinfo * pi, char *func, int line); | |
1120 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1121 | |
c3f6f71d | 1122 | void |
fba45db2 | 1123 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1124 | { |
1125 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1126 | print_sys_errmsg (errmsg, errno); | |
1127 | } | |
c906108c | 1128 | |
c3f6f71d | 1129 | void |
fba45db2 | 1130 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1131 | { |
1132 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1133 | perror_with_name (errmsg); | |
1134 | } | |
c906108c | 1135 | |
c3f6f71d JM |
1136 | /* |
1137 | * Function: proc_get_status | |
1138 | * | |
1139 | * Updates the status struct in the procinfo. | |
1140 | * There is a 'valid' flag, to let other functions know when | |
1141 | * this function needs to be called (so the status is only | |
1142 | * read when it is needed). The status file descriptor is | |
1143 | * also only opened when it is needed. | |
1144 | * | |
1145 | * Return: non-zero for success, zero for failure. | |
1146 | */ | |
c906108c | 1147 | |
c3f6f71d | 1148 | int |
fba45db2 | 1149 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1150 | { |
1151 | /* Status file descriptor is opened "lazily" */ | |
1152 | if (pi->status_fd == 0 && | |
1153 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1154 | { | |
1155 | pi->status_valid = 0; | |
1156 | return 0; | |
1157 | } | |
c906108c | 1158 | |
c3f6f71d JM |
1159 | #ifdef NEW_PROC_API |
1160 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1161 | pi->status_valid = 0; /* fail */ | |
1162 | else | |
1163 | { | |
19958708 | 1164 | /* Sigh... I have to read a different data structure, |
c3f6f71d JM |
1165 | depending on whether this is a main process or an LWP. */ |
1166 | if (pi->tid) | |
19958708 RM |
1167 | pi->status_valid = (read (pi->status_fd, |
1168 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1169 | sizeof (lwpstatus_t)) |
1170 | == sizeof (lwpstatus_t)); | |
1171 | else | |
1172 | { | |
19958708 | 1173 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1174 | (char *) &pi->prstatus, |
1175 | sizeof (gdb_prstatus_t)) | |
1176 | == sizeof (gdb_prstatus_t)); | |
1177 | #if 0 /*def UNIXWARE*/ | |
1178 | if (pi->status_valid && | |
1179 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1180 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1181 | /* Unixware peculiarity -- read the damn thing again! */ | |
19958708 | 1182 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1183 | (char *) &pi->prstatus, |
1184 | sizeof (gdb_prstatus_t)) | |
1185 | == sizeof (gdb_prstatus_t)); | |
1186 | #endif /* UNIXWARE */ | |
1187 | } | |
1188 | } | |
1189 | #else /* ioctl method */ | |
1190 | #ifdef PIOCTSTATUS /* osf */ | |
1191 | if (pi->tid == 0) /* main process */ | |
1192 | { | |
1193 | /* Just read the danged status. Now isn't that simple? */ | |
19958708 | 1194 | pi->status_valid = |
c3f6f71d JM |
1195 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1196 | } | |
1197 | else | |
1198 | { | |
1199 | int win; | |
1200 | struct { | |
1201 | long pr_count; | |
1202 | tid_t pr_error_thread; | |
1203 | struct prstatus status; | |
1204 | } thread_status; | |
1205 | ||
1206 | thread_status.pr_count = 1; | |
1207 | thread_status.status.pr_tid = pi->tid; | |
1208 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1209 | if (win) | |
1210 | { | |
19958708 | 1211 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1212 | sizeof (pi->prstatus)); |
1213 | pi->status_valid = 1; | |
1214 | } | |
1215 | } | |
1216 | #else | |
1217 | /* Just read the danged status. Now isn't that simple? */ | |
1218 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1219 | #endif | |
1220 | #endif | |
c906108c | 1221 | |
c3f6f71d JM |
1222 | if (pi->status_valid) |
1223 | { | |
19958708 | 1224 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1225 | proc_why (pi), |
19958708 | 1226 | proc_what (pi), |
c3f6f71d JM |
1227 | proc_get_current_thread (pi)); |
1228 | } | |
c906108c | 1229 | |
c3f6f71d JM |
1230 | /* The status struct includes general regs, so mark them valid too */ |
1231 | pi->gregs_valid = pi->status_valid; | |
1232 | #ifdef NEW_PROC_API | |
19958708 | 1233 | /* In the read/write multiple-fd model, |
c3f6f71d JM |
1234 | the status struct includes the fp regs too, so mark them valid too */ |
1235 | pi->fpregs_valid = pi->status_valid; | |
1236 | #endif | |
1237 | return pi->status_valid; /* True if success, false if failure. */ | |
1238 | } | |
c906108c | 1239 | |
c3f6f71d JM |
1240 | /* |
1241 | * Function: proc_flags | |
1242 | * | |
1243 | * returns the process flags (pr_flags field). | |
19958708 | 1244 | */ |
c3f6f71d JM |
1245 | |
1246 | long | |
fba45db2 | 1247 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1248 | { |
1249 | if (!pi->status_valid) | |
1250 | if (!proc_get_status (pi)) | |
1251 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1252 | |
c3f6f71d | 1253 | #ifdef NEW_PROC_API |
0d06e24b JM |
1254 | # ifdef UNIXWARE |
1255 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1256 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1257 | The two sets of flags don't overlap. */ | |
1258 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1259 | # else | |
c3f6f71d | 1260 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1261 | # endif |
c3f6f71d JM |
1262 | #else |
1263 | return pi->prstatus.pr_flags; | |
1264 | #endif | |
1265 | } | |
c906108c | 1266 | |
c3f6f71d JM |
1267 | /* |
1268 | * Function: proc_why | |
1269 | * | |
1270 | * returns the pr_why field (why the process stopped). | |
1271 | */ | |
c906108c | 1272 | |
c3f6f71d | 1273 | int |
fba45db2 | 1274 | proc_why (procinfo *pi) |
c3f6f71d JM |
1275 | { |
1276 | if (!pi->status_valid) | |
1277 | if (!proc_get_status (pi)) | |
1278 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1279 | |
c3f6f71d JM |
1280 | #ifdef NEW_PROC_API |
1281 | return pi->prstatus.pr_lwp.pr_why; | |
1282 | #else | |
1283 | return pi->prstatus.pr_why; | |
1284 | #endif | |
1285 | } | |
c906108c | 1286 | |
c3f6f71d JM |
1287 | /* |
1288 | * Function: proc_what | |
1289 | * | |
1290 | * returns the pr_what field (details of why the process stopped). | |
1291 | */ | |
c906108c | 1292 | |
c3f6f71d | 1293 | int |
fba45db2 | 1294 | proc_what (procinfo *pi) |
c3f6f71d JM |
1295 | { |
1296 | if (!pi->status_valid) | |
1297 | if (!proc_get_status (pi)) | |
1298 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1299 | |
c3f6f71d JM |
1300 | #ifdef NEW_PROC_API |
1301 | return pi->prstatus.pr_lwp.pr_what; | |
1302 | #else | |
1303 | return pi->prstatus.pr_what; | |
c906108c | 1304 | #endif |
c3f6f71d | 1305 | } |
c906108c | 1306 | |
c3f6f71d JM |
1307 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1308 | /* | |
1309 | * Function: proc_nsysarg | |
1310 | * | |
1311 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1312 | */ | |
1313 | ||
1314 | int | |
fba45db2 | 1315 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1316 | { |
1317 | if (!pi->status_valid) | |
1318 | if (!proc_get_status (pi)) | |
1319 | return 0; | |
19958708 | 1320 | |
c3f6f71d JM |
1321 | #ifdef NEW_PROC_API |
1322 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1323 | #else | |
1324 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1325 | #endif |
c3f6f71d | 1326 | } |
c906108c | 1327 | |
c3f6f71d JM |
1328 | /* |
1329 | * Function: proc_sysargs | |
1330 | * | |
1331 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1332 | */ | |
c906108c | 1333 | |
c3f6f71d | 1334 | long * |
fba45db2 | 1335 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1336 | { |
1337 | if (!pi->status_valid) | |
1338 | if (!proc_get_status (pi)) | |
1339 | return NULL; | |
19958708 | 1340 | |
c3f6f71d JM |
1341 | #ifdef NEW_PROC_API |
1342 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1343 | #else | |
1344 | return (long *) &pi->prstatus.pr_sysarg; | |
1345 | #endif | |
1346 | } | |
c906108c | 1347 | |
c3f6f71d JM |
1348 | /* |
1349 | * Function: proc_syscall | |
1350 | * | |
1351 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1352 | */ | |
c906108c | 1353 | |
c3f6f71d | 1354 | int |
fba45db2 | 1355 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1356 | { |
1357 | if (!pi->status_valid) | |
1358 | if (!proc_get_status (pi)) | |
1359 | return 0; | |
19958708 | 1360 | |
c3f6f71d JM |
1361 | #ifdef NEW_PROC_API |
1362 | return pi->prstatus.pr_lwp.pr_syscall; | |
1363 | #else | |
1364 | return pi->prstatus.pr_syscall; | |
1365 | #endif | |
1366 | } | |
1367 | #endif /* PIOCSSPCACT */ | |
c906108c | 1368 | |
c3f6f71d JM |
1369 | /* |
1370 | * Function: proc_cursig: | |
1371 | * | |
1372 | * returns the pr_cursig field (current signal). | |
1373 | */ | |
c906108c | 1374 | |
c3f6f71d JM |
1375 | long |
1376 | proc_cursig (struct procinfo *pi) | |
1377 | { | |
1378 | if (!pi->status_valid) | |
1379 | if (!proc_get_status (pi)) | |
1380 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1381 | |
c3f6f71d JM |
1382 | #ifdef NEW_PROC_API |
1383 | return pi->prstatus.pr_lwp.pr_cursig; | |
1384 | #else | |
1385 | return pi->prstatus.pr_cursig; | |
1386 | #endif | |
1387 | } | |
c906108c | 1388 | |
c3f6f71d | 1389 | /* |
19958708 | 1390 | * Function: proc_modify_flag |
c3f6f71d | 1391 | * |
19958708 | 1392 | * === I appologize for the messiness of this function. |
c3f6f71d JM |
1393 | * === This is an area where the different versions of |
1394 | * === /proc are more inconsistent than usual. MVS | |
1395 | * | |
1396 | * Set or reset any of the following process flags: | |
1397 | * PR_FORK -- forked child will inherit trace flags | |
1398 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1399 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1400 | * PR_ASYNC -- LWP's get to run/stop independently. |
1401 | * | |
1402 | * There are three methods for doing this function: | |
1403 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1404 | * [Sol6, Sol7, UW] | |
1405 | * 2) Middle: PIOCSET/PIOCRESET | |
1406 | * [Irix, Sol5] | |
1407 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1408 | * [OSF, Sol5] | |
1409 | * | |
1410 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1411 | * Note: OSF does not define PR_KLC. |
1412 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d | 1413 | * |
19958708 | 1414 | * Arguments: |
c3f6f71d JM |
1415 | * pi -- the procinfo |
1416 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1417 | * mode -- 1 for set, 0 for reset. | |
1418 | * | |
1419 | * Returns non-zero for success, zero for failure. | |
1420 | */ | |
c906108c | 1421 | |
c3f6f71d | 1422 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1423 | |
c3f6f71d | 1424 | static int |
fba45db2 | 1425 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1426 | { |
1427 | long win = 0; /* default to fail */ | |
1428 | ||
19958708 RM |
1429 | /* |
1430 | * These operations affect the process as a whole, and applying | |
1431 | * them to an individual LWP has the same meaning as applying them | |
1432 | * to the main process. Therefore, if we're ever called with a | |
1433 | * pointer to an LWP's procinfo, let's substitute the process's | |
1434 | * procinfo and avoid opening the LWP's file descriptor | |
1435 | * unnecessarily. | |
c3f6f71d JM |
1436 | */ |
1437 | ||
1438 | if (pi->pid != 0) | |
1439 | pi = find_procinfo_or_die (pi->pid, 0); | |
1440 | ||
1441 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
19958708 | 1442 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1443 | (which for no obvious reason has a different definition |
1444 | from one operating system to the next...) */ | |
1445 | #ifdef PCUNSET | |
1446 | #define GDBRESET PCUNSET | |
37de36c6 | 1447 | #else |
c3f6f71d JM |
1448 | #ifdef PCRESET |
1449 | #define GDBRESET PCRESET | |
37de36c6 | 1450 | #endif |
c906108c | 1451 | #endif |
c3f6f71d | 1452 | { |
37de36c6 | 1453 | procfs_ctl_t arg[2]; |
c906108c | 1454 | |
c3f6f71d JM |
1455 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1456 | arg[0] = PCSET; | |
1457 | else /* Reset the flag */ | |
1458 | arg[0] = GDBRESET; | |
c5aa993b | 1459 | |
c3f6f71d JM |
1460 | arg[1] = flag; |
1461 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1462 | } | |
1463 | #else | |
1464 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1465 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1466 | { | |
1467 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1468 | } | |
1469 | else /* Reset the flag */ | |
1470 | { | |
1471 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1472 | } | |
c906108c | 1473 | |
c3f6f71d JM |
1474 | #else |
1475 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1476 | switch (flag) { | |
1477 | case PR_RLC: | |
1478 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1479 | { | |
1480 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1481 | } | |
1482 | else /* Clear run-on-last-close */ | |
1483 | { | |
1484 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1485 | } | |
1486 | break; | |
1487 | case PR_FORK: | |
1488 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1489 | { | |
1490 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1491 | } | |
1492 | else /* Clear inherit-on-fork */ | |
1493 | { | |
1494 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1495 | } | |
1496 | break; | |
1497 | default: | |
1498 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1499 | break; | |
1500 | } | |
1501 | #endif | |
1502 | #endif | |
1503 | #endif | |
1504 | #undef GDBRESET | |
1505 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1506 | pi->status_valid = 0; | |
c906108c | 1507 | |
c3f6f71d | 1508 | if (!win) |
8a3fe4f8 | 1509 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1510 | flag == PR_FORK ? "PR_FORK" : |
1511 | flag == PR_RLC ? "PR_RLC" : | |
1512 | #ifdef PR_ASYNC | |
1513 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1514 | #endif |
1515 | #ifdef PR_KLC | |
1516 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1517 | #endif |
1518 | "<unknown flag>", | |
1519 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1520 | |
c3f6f71d JM |
1521 | return win; |
1522 | } | |
c906108c | 1523 | |
c3f6f71d JM |
1524 | /* |
1525 | * Function: proc_set_run_on_last_close | |
1526 | * | |
1527 | * Set the run_on_last_close flag. | |
1528 | * Process with all threads will become runnable | |
1529 | * when debugger closes all /proc fds. | |
1530 | * | |
1531 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1532 | */ |
1533 | ||
c3f6f71d | 1534 | int |
fba45db2 | 1535 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1536 | { |
c3f6f71d JM |
1537 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1538 | } | |
c906108c | 1539 | |
c3f6f71d JM |
1540 | /* |
1541 | * Function: proc_unset_run_on_last_close | |
1542 | * | |
1543 | * Reset the run_on_last_close flag. | |
1544 | * Process will NOT become runnable | |
1545 | * when debugger closes its file handles. | |
1546 | * | |
1547 | * Returns non-zero for success, zero for failure. | |
1548 | */ | |
c906108c | 1549 | |
c3f6f71d | 1550 | int |
fba45db2 | 1551 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1552 | { |
1553 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1554 | } |
1555 | ||
0d06e24b JM |
1556 | #ifdef PR_KLC |
1557 | /* | |
1558 | * Function: proc_set_kill_on_last_close | |
1559 | * | |
1560 | * Set the kill_on_last_close flag. | |
1561 | * Process with all threads will be killed when debugger | |
1562 | * closes all /proc fds (or debugger exits or dies). | |
1563 | * | |
1564 | * Returns non-zero for success, zero for failure. | |
1565 | */ | |
1566 | ||
1567 | int | |
fba45db2 | 1568 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1569 | { |
1570 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1571 | } | |
1572 | ||
1573 | /* | |
1574 | * Function: proc_unset_kill_on_last_close | |
1575 | * | |
1576 | * Reset the kill_on_last_close flag. | |
19958708 | 1577 | * Process will NOT be killed when debugger |
0d06e24b JM |
1578 | * closes its file handles (or exits or dies). |
1579 | * | |
1580 | * Returns non-zero for success, zero for failure. | |
1581 | */ | |
1582 | ||
1583 | int | |
fba45db2 | 1584 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1585 | { |
1586 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1587 | } | |
1588 | #endif /* PR_KLC */ | |
1589 | ||
c906108c | 1590 | /* |
c3f6f71d JM |
1591 | * Function: proc_set_inherit_on_fork |
1592 | * | |
1593 | * Set inherit_on_fork flag. | |
1594 | * If the process forks a child while we are registered for events | |
1595 | * in the parent, then we will also recieve events from the child. | |
1596 | * | |
1597 | * Returns non-zero for success, zero for failure. | |
1598 | */ | |
c906108c | 1599 | |
c3f6f71d | 1600 | int |
fba45db2 | 1601 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1602 | { |
1603 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1604 | } | |
c5aa993b | 1605 | |
c3f6f71d JM |
1606 | /* |
1607 | * Function: proc_unset_inherit_on_fork | |
1608 | * | |
1609 | * Reset inherit_on_fork flag. | |
1610 | * If the process forks a child while we are registered for events | |
1611 | * in the parent, then we will NOT recieve events from the child. | |
1612 | * | |
1613 | * Returns non-zero for success, zero for failure. | |
1614 | */ | |
c906108c | 1615 | |
c3f6f71d | 1616 | int |
fba45db2 | 1617 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1618 | { |
1619 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1620 | } | |
c906108c | 1621 | |
c3f6f71d JM |
1622 | #ifdef PR_ASYNC |
1623 | /* | |
1624 | * Function: proc_set_async | |
1625 | * | |
1626 | * Set PR_ASYNC flag. | |
19958708 | 1627 | * If one LWP stops because of a debug event (signal etc.), |
c3f6f71d JM |
1628 | * the remaining LWPs will continue to run. |
1629 | * | |
1630 | * Returns non-zero for success, zero for failure. | |
1631 | */ | |
c906108c | 1632 | |
c3f6f71d | 1633 | int |
fba45db2 | 1634 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1635 | { |
1636 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1637 | } | |
c906108c | 1638 | |
c3f6f71d JM |
1639 | /* |
1640 | * Function: proc_unset_async | |
1641 | * | |
1642 | * Reset PR_ASYNC flag. | |
1643 | * If one LWP stops because of a debug event (signal etc.), | |
1644 | * then all other LWPs will stop as well. | |
1645 | * | |
1646 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1647 | */ |
1648 | ||
c3f6f71d | 1649 | int |
fba45db2 | 1650 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1651 | { |
1652 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1653 | } | |
1654 | #endif /* PR_ASYNC */ | |
c906108c SS |
1655 | |
1656 | /* | |
c3f6f71d JM |
1657 | * Function: proc_stop_process |
1658 | * | |
1659 | * Request the process/LWP to stop. Does not wait. | |
19958708 | 1660 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1661 | */ |
c906108c | 1662 | |
c3f6f71d | 1663 | int |
fba45db2 | 1664 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1665 | { |
1666 | int win; | |
c906108c | 1667 | |
c3f6f71d JM |
1668 | /* |
1669 | * We might conceivably apply this operation to an LWP, and | |
1670 | * the LWP's ctl file descriptor might not be open. | |
1671 | */ | |
c906108c | 1672 | |
c3f6f71d JM |
1673 | if (pi->ctl_fd == 0 && |
1674 | open_procinfo_files (pi, FD_CTL) == 0) | |
1675 | return 0; | |
1676 | else | |
1677 | { | |
1678 | #ifdef NEW_PROC_API | |
37de36c6 | 1679 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1680 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1681 | #else /* ioctl method */ | |
1682 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1683 | /* Note: the call also reads the prstatus. */ | |
1684 | if (win) | |
1685 | { | |
1686 | pi->status_valid = 1; | |
19958708 | 1687 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1688 | proc_why (pi), |
19958708 | 1689 | proc_what (pi), |
c3f6f71d JM |
1690 | proc_get_current_thread (pi)); |
1691 | } | |
1692 | #endif | |
1693 | } | |
c906108c | 1694 | |
c3f6f71d JM |
1695 | return win; |
1696 | } | |
c5aa993b | 1697 | |
c3f6f71d JM |
1698 | /* |
1699 | * Function: proc_wait_for_stop | |
1700 | * | |
1701 | * Wait for the process or LWP to stop (block until it does). | |
19958708 | 1702 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1703 | */ |
1704 | ||
c3f6f71d | 1705 | int |
fba45db2 | 1706 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1707 | { |
c3f6f71d JM |
1708 | int win; |
1709 | ||
1710 | /* | |
1711 | * We should never have to apply this operation to any procinfo | |
1712 | * except the one for the main process. If that ever changes | |
19958708 | 1713 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1714 | * replace it with one that makes sure the ctl_fd is open. |
1715 | */ | |
19958708 | 1716 | |
c3f6f71d JM |
1717 | if (pi->tid != 0) |
1718 | pi = find_procinfo_or_die (pi->pid, 0); | |
1719 | ||
1720 | #ifdef NEW_PROC_API | |
1721 | { | |
37de36c6 | 1722 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1723 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1724 | /* We been runnin' and we stopped -- need to update status. */ | |
1725 | pi->status_valid = 0; | |
1726 | } | |
1727 | #else /* ioctl method */ | |
1728 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1729 | /* Above call also refreshes the prstatus. */ | |
1730 | if (win) | |
1731 | { | |
1732 | pi->status_valid = 1; | |
19958708 | 1733 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1734 | proc_why (pi), |
19958708 | 1735 | proc_what (pi), |
c3f6f71d JM |
1736 | proc_get_current_thread (pi)); |
1737 | } | |
c906108c SS |
1738 | #endif |
1739 | ||
c3f6f71d | 1740 | return win; |
c906108c SS |
1741 | } |
1742 | ||
1743 | /* | |
c3f6f71d JM |
1744 | * Function: proc_run_process |
1745 | * | |
1746 | * Make the process or LWP runnable. | |
1747 | * Options (not all are implemented): | |
1748 | * - single-step | |
1749 | * - clear current fault | |
1750 | * - clear current signal | |
1751 | * - abort the current system call | |
1752 | * - stop as soon as finished with system call | |
1753 | * - (ioctl): set traced signal set | |
1754 | * - (ioctl): set held signal set | |
1755 | * - (ioctl): set traced fault set | |
1756 | * - (ioctl): set start pc (vaddr) | |
1757 | * Always clear the current fault. | |
1758 | * Clear the current signal if 'signo' is zero. | |
1759 | * | |
1760 | * Arguments: | |
1761 | * pi the process or LWP to operate on. | |
1762 | * step if true, set the process or LWP to trap after one instr. | |
1763 | * signo if zero, clear the current signal if any. | |
1764 | * if non-zero, set the current signal to this one. | |
1765 | * | |
19958708 | 1766 | * Returns non-zero for success, zero for failure. |
c3f6f71d JM |
1767 | */ |
1768 | ||
1769 | int | |
fba45db2 | 1770 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1771 | { |
1772 | int win; | |
1773 | int runflags; | |
1774 | ||
1775 | /* | |
1776 | * We will probably have to apply this operation to individual threads, | |
1777 | * so make sure the control file descriptor is open. | |
1778 | */ | |
19958708 | 1779 | |
c3f6f71d JM |
1780 | if (pi->ctl_fd == 0 && |
1781 | open_procinfo_files (pi, FD_CTL) == 0) | |
1782 | { | |
1783 | return 0; | |
1784 | } | |
c906108c | 1785 | |
c3f6f71d JM |
1786 | runflags = PRCFAULT; /* always clear current fault */ |
1787 | if (step) | |
1788 | runflags |= PRSTEP; | |
1789 | if (signo == 0) | |
1790 | runflags |= PRCSIG; | |
1791 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1792 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1793 | |
c3f6f71d JM |
1794 | #ifdef NEW_PROC_API |
1795 | { | |
37de36c6 | 1796 | procfs_ctl_t cmd[2]; |
c906108c | 1797 | |
c3f6f71d JM |
1798 | cmd[0] = PCRUN; |
1799 | cmd[1] = runflags; | |
1800 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1801 | } | |
1802 | #else /* ioctl method */ | |
1803 | { | |
1804 | prrun_t prrun; | |
c906108c | 1805 | |
c3f6f71d JM |
1806 | memset (&prrun, 0, sizeof (prrun)); |
1807 | prrun.pr_flags = runflags; | |
1808 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1809 | } | |
1810 | #endif | |
c906108c | 1811 | |
c3f6f71d JM |
1812 | return win; |
1813 | } | |
c906108c | 1814 | |
c3f6f71d JM |
1815 | /* |
1816 | * Function: proc_set_traced_signals | |
1817 | * | |
1818 | * Register to trace signals in the process or LWP. | |
19958708 | 1819 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1820 | */ |
1821 | ||
c3f6f71d | 1822 | int |
37de36c6 | 1823 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1824 | { |
c3f6f71d JM |
1825 | int win; |
1826 | ||
1827 | /* | |
1828 | * We should never have to apply this operation to any procinfo | |
1829 | * except the one for the main process. If that ever changes | |
19958708 | 1830 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1831 | * replace it with one that makes sure the ctl_fd is open. |
1832 | */ | |
19958708 | 1833 | |
c3f6f71d JM |
1834 | if (pi->tid != 0) |
1835 | pi = find_procinfo_or_die (pi->pid, 0); | |
1836 | ||
1837 | #ifdef NEW_PROC_API | |
1838 | { | |
1839 | struct { | |
37de36c6 | 1840 | procfs_ctl_t cmd; |
c3f6f71d | 1841 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1842 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1843 | } arg; |
c906108c | 1844 | |
c3f6f71d | 1845 | arg.cmd = PCSTRACE; |
37de36c6 | 1846 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1847 | |
c3f6f71d JM |
1848 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1849 | } | |
1850 | #else /* ioctl method */ | |
1851 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1852 | #endif | |
1853 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1854 | pi->status_valid = 0; | |
c906108c | 1855 | |
c3f6f71d | 1856 | if (!win) |
8a3fe4f8 | 1857 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1858 | return win; |
c906108c SS |
1859 | } |
1860 | ||
1861 | /* | |
c3f6f71d JM |
1862 | * Function: proc_set_traced_faults |
1863 | * | |
1864 | * Register to trace hardware faults in the process or LWP. | |
19958708 | 1865 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1866 | */ |
c906108c | 1867 | |
c3f6f71d | 1868 | int |
fba45db2 | 1869 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1870 | { |
1871 | int win; | |
1872 | ||
1873 | /* | |
1874 | * We should never have to apply this operation to any procinfo | |
1875 | * except the one for the main process. If that ever changes | |
19958708 | 1876 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1877 | * replace it with one that makes sure the ctl_fd is open. |
1878 | */ | |
19958708 | 1879 | |
c3f6f71d JM |
1880 | if (pi->tid != 0) |
1881 | pi = find_procinfo_or_die (pi->pid, 0); | |
1882 | ||
1883 | #ifdef NEW_PROC_API | |
1884 | { | |
1885 | struct { | |
37de36c6 | 1886 | procfs_ctl_t cmd; |
c3f6f71d JM |
1887 | /* Use char array to avoid alignment issues. */ |
1888 | char fltset[sizeof (fltset_t)]; | |
1889 | } arg; | |
c906108c | 1890 | |
c3f6f71d JM |
1891 | arg.cmd = PCSFAULT; |
1892 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1893 | |
c3f6f71d JM |
1894 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1895 | } | |
1896 | #else /* ioctl method */ | |
1897 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1898 | #endif | |
1899 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1900 | pi->status_valid = 0; | |
c906108c | 1901 | |
c3f6f71d JM |
1902 | return win; |
1903 | } | |
c5aa993b | 1904 | |
c3f6f71d JM |
1905 | /* |
1906 | * Function: proc_set_traced_sysentry | |
1907 | * | |
1908 | * Register to trace entry to system calls in the process or LWP. | |
19958708 | 1909 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1910 | */ |
1911 | ||
c3f6f71d | 1912 | int |
fba45db2 | 1913 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1914 | { |
c3f6f71d JM |
1915 | int win; |
1916 | ||
1917 | /* | |
1918 | * We should never have to apply this operation to any procinfo | |
1919 | * except the one for the main process. If that ever changes | |
19958708 | 1920 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1921 | * replace it with one that makes sure the ctl_fd is open. |
1922 | */ | |
19958708 | 1923 | |
c3f6f71d JM |
1924 | if (pi->tid != 0) |
1925 | pi = find_procinfo_or_die (pi->pid, 0); | |
1926 | ||
1927 | #ifdef NEW_PROC_API | |
1928 | { | |
37de36c6 KB |
1929 | struct gdb_proc_ctl_pcsentry { |
1930 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1931 | /* Use char array to avoid alignment issues. */ |
1932 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1933 | } *argp; |
1934 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1935 | - sizeof (sysset_t) | |
1936 | + sysset_t_size (pi); | |
c3f6f71d | 1937 | |
37de36c6 | 1938 | argp = xmalloc (argp_size); |
c3f6f71d | 1939 | |
37de36c6 KB |
1940 | argp->cmd = PCSENTRY; |
1941 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1942 | ||
1943 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1944 | xfree (argp); | |
c3f6f71d JM |
1945 | } |
1946 | #else /* ioctl method */ | |
1947 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1948 | #endif | |
1949 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1950 | pi->status_valid = 0; | |
19958708 | 1951 | |
c3f6f71d | 1952 | return win; |
c906108c SS |
1953 | } |
1954 | ||
1955 | /* | |
c3f6f71d JM |
1956 | * Function: proc_set_traced_sysexit |
1957 | * | |
1958 | * Register to trace exit from system calls in the process or LWP. | |
19958708 | 1959 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1960 | */ |
c906108c | 1961 | |
c3f6f71d | 1962 | int |
fba45db2 | 1963 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1964 | { |
1965 | int win; | |
1966 | ||
1967 | /* | |
1968 | * We should never have to apply this operation to any procinfo | |
1969 | * except the one for the main process. If that ever changes | |
19958708 | 1970 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1971 | * replace it with one that makes sure the ctl_fd is open. |
1972 | */ | |
19958708 | 1973 | |
c3f6f71d JM |
1974 | if (pi->tid != 0) |
1975 | pi = find_procinfo_or_die (pi->pid, 0); | |
1976 | ||
1977 | #ifdef NEW_PROC_API | |
1978 | { | |
37de36c6 KB |
1979 | struct gdb_proc_ctl_pcsexit { |
1980 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1981 | /* Use char array to avoid alignment issues. */ |
1982 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1983 | } *argp; |
1984 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1985 | - sizeof (sysset_t) | |
1986 | + sysset_t_size (pi); | |
c906108c | 1987 | |
37de36c6 | 1988 | argp = xmalloc (argp_size); |
c906108c | 1989 | |
37de36c6 KB |
1990 | argp->cmd = PCSEXIT; |
1991 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1992 | ||
1993 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1994 | xfree (argp); | |
c3f6f71d JM |
1995 | } |
1996 | #else /* ioctl method */ | |
1997 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1998 | #endif | |
1999 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
2000 | pi->status_valid = 0; | |
c906108c | 2001 | |
c3f6f71d JM |
2002 | return win; |
2003 | } | |
c906108c | 2004 | |
c3f6f71d JM |
2005 | /* |
2006 | * Function: proc_set_held_signals | |
2007 | * | |
2008 | * Specify the set of blocked / held signals in the process or LWP. | |
19958708 | 2009 | * Returns non-zero for success, zero for failure. |
c906108c SS |
2010 | */ |
2011 | ||
c3f6f71d | 2012 | int |
37de36c6 | 2013 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 2014 | { |
c3f6f71d JM |
2015 | int win; |
2016 | ||
2017 | /* | |
2018 | * We should never have to apply this operation to any procinfo | |
2019 | * except the one for the main process. If that ever changes | |
19958708 | 2020 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2021 | * replace it with one that makes sure the ctl_fd is open. |
2022 | */ | |
19958708 | 2023 | |
c3f6f71d JM |
2024 | if (pi->tid != 0) |
2025 | pi = find_procinfo_or_die (pi->pid, 0); | |
2026 | ||
2027 | #ifdef NEW_PROC_API | |
2028 | { | |
2029 | struct { | |
37de36c6 | 2030 | procfs_ctl_t cmd; |
c3f6f71d | 2031 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2032 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
2033 | } arg; |
2034 | ||
2035 | arg.cmd = PCSHOLD; | |
37de36c6 | 2036 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2037 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
2038 | } | |
c906108c | 2039 | #else |
c3f6f71d | 2040 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 2041 | #endif |
c3f6f71d JM |
2042 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
2043 | pi->status_valid = 0; | |
2044 | ||
2045 | return win; | |
c906108c SS |
2046 | } |
2047 | ||
2048 | /* | |
c3f6f71d JM |
2049 | * Function: proc_get_pending_signals |
2050 | * | |
2051 | * returns the set of signals that are pending in the process or LWP. | |
2052 | * Will also copy the sigset if 'save' is non-zero. | |
2053 | */ | |
c906108c | 2054 | |
37de36c6 KB |
2055 | gdb_sigset_t * |
2056 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 2057 | { |
37de36c6 | 2058 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2059 | |
2060 | /* | |
2061 | * We should never have to apply this operation to any procinfo | |
2062 | * except the one for the main process. If that ever changes | |
19958708 | 2063 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2064 | * replace it with one that makes sure the ctl_fd is open. |
2065 | */ | |
19958708 | 2066 | |
c3f6f71d JM |
2067 | if (pi->tid != 0) |
2068 | pi = find_procinfo_or_die (pi->pid, 0); | |
2069 | ||
2070 | if (!pi->status_valid) | |
2071 | if (!proc_get_status (pi)) | |
2072 | return NULL; | |
2073 | ||
2074 | #ifdef NEW_PROC_API | |
2075 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2076 | #else | |
2077 | ret = &pi->prstatus.pr_sigpend; | |
2078 | #endif | |
2079 | if (save && ret) | |
37de36c6 | 2080 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2081 | |
c3f6f71d JM |
2082 | return ret; |
2083 | } | |
c906108c | 2084 | |
c3f6f71d JM |
2085 | /* |
2086 | * Function: proc_get_signal_actions | |
2087 | * | |
2088 | * returns the set of signal actions. | |
2089 | * Will also copy the sigactionset if 'save' is non-zero. | |
2090 | */ | |
c906108c | 2091 | |
37de36c6 KB |
2092 | gdb_sigaction_t * |
2093 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2094 | { |
37de36c6 | 2095 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2096 | |
2097 | /* | |
2098 | * We should never have to apply this operation to any procinfo | |
2099 | * except the one for the main process. If that ever changes | |
19958708 | 2100 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2101 | * replace it with one that makes sure the ctl_fd is open. |
2102 | */ | |
19958708 | 2103 | |
c3f6f71d JM |
2104 | if (pi->tid != 0) |
2105 | pi = find_procinfo_or_die (pi->pid, 0); | |
2106 | ||
2107 | if (!pi->status_valid) | |
2108 | if (!proc_get_status (pi)) | |
2109 | return NULL; | |
2110 | ||
2111 | #ifdef NEW_PROC_API | |
2112 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2113 | #else | |
2114 | ret = &pi->prstatus.pr_action; | |
2115 | #endif | |
2116 | if (save && ret) | |
37de36c6 | 2117 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2118 | |
c3f6f71d JM |
2119 | return ret; |
2120 | } | |
c5aa993b | 2121 | |
c3f6f71d JM |
2122 | /* |
2123 | * Function: proc_get_held_signals | |
2124 | * | |
2125 | * returns the set of signals that are held / blocked. | |
2126 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2127 | */ |
2128 | ||
37de36c6 KB |
2129 | gdb_sigset_t * |
2130 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2131 | { |
37de36c6 | 2132 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2133 | |
2134 | /* | |
2135 | * We should never have to apply this operation to any procinfo | |
2136 | * except the one for the main process. If that ever changes | |
19958708 | 2137 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2138 | * replace it with one that makes sure the ctl_fd is open. |
2139 | */ | |
19958708 | 2140 | |
c3f6f71d JM |
2141 | if (pi->tid != 0) |
2142 | pi = find_procinfo_or_die (pi->pid, 0); | |
2143 | ||
2144 | #ifdef NEW_PROC_API | |
2145 | if (!pi->status_valid) | |
2146 | if (!proc_get_status (pi)) | |
2147 | return NULL; | |
2148 | ||
2149 | #ifdef UNIXWARE | |
2150 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2151 | #else |
c3f6f71d JM |
2152 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2153 | #endif /* UNIXWARE */ | |
2154 | #else /* not NEW_PROC_API */ | |
2155 | { | |
37de36c6 | 2156 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2157 | |
2158 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2159 | ret = &sigheld; | |
2160 | } | |
2161 | #endif /* NEW_PROC_API */ | |
2162 | if (save && ret) | |
37de36c6 | 2163 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2164 | |
2165 | return ret; | |
c906108c SS |
2166 | } |
2167 | ||
c3f6f71d JM |
2168 | /* |
2169 | * Function: proc_get_traced_signals | |
2170 | * | |
2171 | * returns the set of signals that are traced / debugged. | |
2172 | * Will also copy the sigset if 'save' is non-zero. | |
2173 | */ | |
2174 | ||
37de36c6 KB |
2175 | gdb_sigset_t * |
2176 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2177 | { |
37de36c6 | 2178 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2179 | |
2180 | /* | |
2181 | * We should never have to apply this operation to any procinfo | |
2182 | * except the one for the main process. If that ever changes | |
19958708 | 2183 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2184 | * replace it with one that makes sure the ctl_fd is open. |
2185 | */ | |
19958708 | 2186 | |
c3f6f71d JM |
2187 | if (pi->tid != 0) |
2188 | pi = find_procinfo_or_die (pi->pid, 0); | |
2189 | ||
2190 | #ifdef NEW_PROC_API | |
2191 | if (!pi->status_valid) | |
2192 | if (!proc_get_status (pi)) | |
2193 | return NULL; | |
2194 | ||
2195 | ret = &pi->prstatus.pr_sigtrace; | |
2196 | #else | |
2197 | { | |
37de36c6 | 2198 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2199 | |
2200 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2201 | ret = &sigtrace; | |
2202 | } | |
c906108c | 2203 | #endif |
c3f6f71d | 2204 | if (save && ret) |
37de36c6 | 2205 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2206 | |
c3f6f71d JM |
2207 | return ret; |
2208 | } | |
c906108c | 2209 | |
c3f6f71d JM |
2210 | /* |
2211 | * Function: proc_trace_signal | |
2212 | * | |
2213 | * Add 'signo' to the set of signals that are traced. | |
2214 | * Returns non-zero for success, zero for failure. | |
2215 | */ | |
c906108c | 2216 | |
c3f6f71d | 2217 | int |
fba45db2 | 2218 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2219 | { |
37de36c6 | 2220 | gdb_sigset_t temp; |
c3f6f71d JM |
2221 | |
2222 | /* | |
2223 | * We should never have to apply this operation to any procinfo | |
2224 | * except the one for the main process. If that ever changes | |
19958708 | 2225 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2226 | * replace it with one that makes sure the ctl_fd is open. |
2227 | */ | |
19958708 | 2228 | |
c3f6f71d JM |
2229 | if (pi->tid != 0) |
2230 | pi = find_procinfo_or_die (pi->pid, 0); | |
2231 | ||
2232 | if (pi) | |
c906108c | 2233 | { |
c3f6f71d | 2234 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2235 | { |
c3f6f71d JM |
2236 | praddset (&temp, signo); |
2237 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
2238 | } |
2239 | } | |
c5aa993b | 2240 | |
c3f6f71d JM |
2241 | return 0; /* failure */ |
2242 | } | |
c906108c | 2243 | |
c3f6f71d JM |
2244 | /* |
2245 | * Function: proc_ignore_signal | |
2246 | * | |
2247 | * Remove 'signo' from the set of signals that are traced. | |
2248 | * Returns non-zero for success, zero for failure. | |
2249 | */ | |
c906108c | 2250 | |
c3f6f71d | 2251 | int |
fba45db2 | 2252 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2253 | { |
37de36c6 | 2254 | gdb_sigset_t temp; |
c3f6f71d JM |
2255 | |
2256 | /* | |
2257 | * We should never have to apply this operation to any procinfo | |
2258 | * except the one for the main process. If that ever changes | |
19958708 | 2259 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2260 | * replace it with one that makes sure the ctl_fd is open. |
2261 | */ | |
19958708 | 2262 | |
c3f6f71d JM |
2263 | if (pi->tid != 0) |
2264 | pi = find_procinfo_or_die (pi->pid, 0); | |
2265 | ||
2266 | if (pi) | |
c906108c | 2267 | { |
c3f6f71d | 2268 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2269 | { |
c3f6f71d JM |
2270 | prdelset (&temp, signo); |
2271 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 2272 | } |
c906108c | 2273 | } |
c906108c | 2274 | |
c3f6f71d | 2275 | return 0; /* failure */ |
c906108c SS |
2276 | } |
2277 | ||
2278 | /* | |
c3f6f71d JM |
2279 | * Function: proc_get_traced_faults |
2280 | * | |
2281 | * returns the set of hardware faults that are traced /debugged. | |
2282 | * Will also copy the faultset if 'save' is non-zero. | |
2283 | */ | |
2284 | ||
2285 | fltset_t * | |
fba45db2 | 2286 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2287 | { |
2288 | fltset_t *ret = NULL; | |
2289 | ||
2290 | /* | |
2291 | * We should never have to apply this operation to any procinfo | |
2292 | * except the one for the main process. If that ever changes | |
19958708 | 2293 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2294 | * replace it with one that makes sure the ctl_fd is open. |
2295 | */ | |
19958708 | 2296 | |
c3f6f71d JM |
2297 | if (pi->tid != 0) |
2298 | pi = find_procinfo_or_die (pi->pid, 0); | |
2299 | ||
2300 | #ifdef NEW_PROC_API | |
2301 | if (!pi->status_valid) | |
2302 | if (!proc_get_status (pi)) | |
2303 | return NULL; | |
2304 | ||
2305 | ret = &pi->prstatus.pr_flttrace; | |
2306 | #else | |
2307 | { | |
2308 | static fltset_t flttrace; | |
2309 | ||
2310 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2311 | ret = &flttrace; | |
2312 | } | |
2313 | #endif | |
2314 | if (save && ret) | |
2315 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2316 | |
c3f6f71d JM |
2317 | return ret; |
2318 | } | |
c906108c | 2319 | |
c3f6f71d JM |
2320 | /* |
2321 | * Function: proc_get_traced_sysentry | |
2322 | * | |
2323 | * returns the set of syscalls that are traced /debugged on entry. | |
2324 | * Will also copy the syscall set if 'save' is non-zero. | |
2325 | */ | |
c906108c | 2326 | |
c3f6f71d | 2327 | sysset_t * |
fba45db2 | 2328 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2329 | { |
2330 | sysset_t *ret = NULL; | |
2331 | ||
2332 | /* | |
2333 | * We should never have to apply this operation to any procinfo | |
2334 | * except the one for the main process. If that ever changes | |
19958708 | 2335 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2336 | * replace it with one that makes sure the ctl_fd is open. |
2337 | */ | |
19958708 | 2338 | |
c3f6f71d JM |
2339 | if (pi->tid != 0) |
2340 | pi = find_procinfo_or_die (pi->pid, 0); | |
2341 | ||
2342 | #ifdef NEW_PROC_API | |
2343 | if (!pi->status_valid) | |
2344 | if (!proc_get_status (pi)) | |
2345 | return NULL; | |
2346 | ||
37de36c6 | 2347 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2348 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2349 | #else /* DYNAMIC_SYSCALLS */ |
2350 | { | |
2351 | static sysset_t *sysentry; | |
2352 | size_t size; | |
2353 | ||
2354 | if (!sysentry) | |
2355 | sysentry = sysset_t_alloc (pi); | |
2356 | ret = sysentry; | |
2357 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2358 | return NULL; | |
2359 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2360 | { | |
2361 | gdb_premptysysset (sysentry); | |
2362 | } | |
2363 | else | |
2364 | { | |
2365 | int rsize; | |
2366 | ||
2367 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2368 | SEEK_SET) | |
2369 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2370 | return NULL; | |
2371 | size = sysset_t_size (pi); | |
2372 | gdb_premptysysset (sysentry); | |
2373 | rsize = read (pi->status_fd, sysentry, size); | |
2374 | if (rsize < 0) | |
2375 | return NULL; | |
2376 | } | |
2377 | } | |
2378 | #endif /* DYNAMIC_SYSCALLS */ | |
2379 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2380 | { |
2381 | static sysset_t sysentry; | |
c906108c | 2382 | |
c3f6f71d JM |
2383 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2384 | ret = &sysentry; | |
2385 | } | |
37de36c6 | 2386 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2387 | if (save && ret) |
37de36c6 | 2388 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2389 | |
c3f6f71d JM |
2390 | return ret; |
2391 | } | |
c5aa993b | 2392 | |
c3f6f71d JM |
2393 | /* |
2394 | * Function: proc_get_traced_sysexit | |
2395 | * | |
2396 | * returns the set of syscalls that are traced /debugged on exit. | |
2397 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2398 | */ |
2399 | ||
c3f6f71d | 2400 | sysset_t * |
fba45db2 | 2401 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2402 | { |
c3f6f71d JM |
2403 | sysset_t * ret = NULL; |
2404 | ||
2405 | /* | |
2406 | * We should never have to apply this operation to any procinfo | |
2407 | * except the one for the main process. If that ever changes | |
19958708 | 2408 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2409 | * replace it with one that makes sure the ctl_fd is open. |
2410 | */ | |
19958708 | 2411 | |
c3f6f71d JM |
2412 | if (pi->tid != 0) |
2413 | pi = find_procinfo_or_die (pi->pid, 0); | |
2414 | ||
2415 | #ifdef NEW_PROC_API | |
2416 | if (!pi->status_valid) | |
2417 | if (!proc_get_status (pi)) | |
2418 | return NULL; | |
2419 | ||
37de36c6 | 2420 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2421 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2422 | #else /* DYNAMIC_SYSCALLS */ |
2423 | { | |
2424 | static sysset_t *sysexit; | |
2425 | size_t size; | |
2426 | ||
2427 | if (!sysexit) | |
2428 | sysexit = sysset_t_alloc (pi); | |
2429 | ret = sysexit; | |
2430 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2431 | return NULL; | |
2432 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2433 | { | |
2434 | gdb_premptysysset (sysexit); | |
2435 | } | |
2436 | else | |
2437 | { | |
2438 | int rsize; | |
2439 | ||
2440 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2441 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2442 | return NULL; | |
2443 | size = sysset_t_size (pi); | |
2444 | gdb_premptysysset (sysexit); | |
2445 | rsize = read (pi->status_fd, sysexit, size); | |
2446 | if (rsize < 0) | |
2447 | return NULL; | |
2448 | } | |
2449 | } | |
2450 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2451 | #else |
2452 | { | |
2453 | static sysset_t sysexit; | |
c5aa993b | 2454 | |
c3f6f71d JM |
2455 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2456 | ret = &sysexit; | |
2457 | } | |
2458 | #endif | |
2459 | if (save && ret) | |
37de36c6 | 2460 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2461 | |
2462 | return ret; | |
2463 | } | |
c906108c | 2464 | |
c3f6f71d JM |
2465 | /* |
2466 | * Function: proc_clear_current_fault | |
2467 | * | |
2468 | * The current fault (if any) is cleared; the associated signal | |
2469 | * will not be sent to the process or LWP when it resumes. | |
2470 | * Returns non-zero for success, zero for failure. | |
2471 | */ | |
c906108c | 2472 | |
c3f6f71d | 2473 | int |
fba45db2 | 2474 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2475 | { |
2476 | int win; | |
2477 | ||
2478 | /* | |
2479 | * We should never have to apply this operation to any procinfo | |
2480 | * except the one for the main process. If that ever changes | |
19958708 | 2481 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2482 | * replace it with one that makes sure the ctl_fd is open. |
2483 | */ | |
19958708 | 2484 | |
c3f6f71d JM |
2485 | if (pi->tid != 0) |
2486 | pi = find_procinfo_or_die (pi->pid, 0); | |
2487 | ||
2488 | #ifdef NEW_PROC_API | |
2489 | { | |
37de36c6 | 2490 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2491 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2492 | } | |
2493 | #else | |
2494 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2495 | #endif | |
2496 | ||
2497 | return win; | |
c906108c SS |
2498 | } |
2499 | ||
2500 | /* | |
c3f6f71d JM |
2501 | * Function: proc_set_current_signal |
2502 | * | |
2503 | * Set the "current signal" that will be delivered next to the process. | |
2504 | * NOTE: semantics are different from those of KILL. | |
2505 | * This signal will be delivered to the process or LWP | |
2506 | * immediately when it is resumed (even if the signal is held/blocked); | |
2507 | * it will NOT immediately cause another event of interest, and will NOT | |
2508 | * first trap back to the debugger. | |
2509 | * | |
2510 | * Returns non-zero for success, zero for failure. | |
2511 | */ | |
2512 | ||
2513 | int | |
fba45db2 | 2514 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2515 | { |
2516 | int win; | |
2517 | struct { | |
37de36c6 | 2518 | procfs_ctl_t cmd; |
c3f6f71d | 2519 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2520 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2521 | } arg; |
37de36c6 | 2522 | gdb_siginfo_t *mysinfo; |
c162e8c9 JM |
2523 | ptid_t wait_ptid; |
2524 | struct target_waitstatus wait_status; | |
c3f6f71d JM |
2525 | |
2526 | /* | |
2527 | * We should never have to apply this operation to any procinfo | |
2528 | * except the one for the main process. If that ever changes | |
19958708 | 2529 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2530 | * replace it with one that makes sure the ctl_fd is open. |
2531 | */ | |
19958708 | 2532 | |
c3f6f71d JM |
2533 | if (pi->tid != 0) |
2534 | pi = find_procinfo_or_die (pi->pid, 0); | |
2535 | ||
2536 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2537 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2538 | * receives a PIOCSSIG with a signal identical to the current signal, | |
19958708 | 2539 | * it messes up the current signal. Work around the kernel bug. |
c3f6f71d JM |
2540 | */ |
2541 | if (signo > 0 && | |
2542 | signo == proc_cursig (pi)) | |
2543 | return 1; /* I assume this is a success? */ | |
2544 | #endif | |
2545 | ||
2546 | /* The pointer is just a type alias. */ | |
37de36c6 | 2547 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c162e8c9 JM |
2548 | get_last_target_status (&wait_ptid, &wait_status); |
2549 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2550 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2551 | && wait_status.value.sig == target_signal_from_host (signo) | |
2552 | && proc_get_status (pi) | |
2553 | #ifdef NEW_PROC_API | |
2554 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2555 | #else | |
2556 | && pi->prstatus.pr_info.si_signo == signo | |
2557 | #endif | |
2558 | ) | |
2559 | /* Use the siginfo associated with the signal being | |
2560 | redelivered. */ | |
2561 | #ifdef NEW_PROC_API | |
2562 | memcpy (mysinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); | |
2563 | #else | |
2564 | memcpy (mysinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); | |
2565 | #endif | |
2566 | else | |
2567 | { | |
2568 | mysinfo->si_signo = signo; | |
2569 | mysinfo->si_code = 0; | |
2570 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2571 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2572 | } | |
c3f6f71d JM |
2573 | |
2574 | #ifdef NEW_PROC_API | |
2575 | arg.cmd = PCSSIG; | |
2576 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2577 | #else | |
2578 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2579 | #endif | |
c906108c | 2580 | |
c3f6f71d JM |
2581 | return win; |
2582 | } | |
c906108c | 2583 | |
c3f6f71d JM |
2584 | /* |
2585 | * Function: proc_clear_current_signal | |
2586 | * | |
2587 | * The current signal (if any) is cleared, and | |
2588 | * is not sent to the process or LWP when it resumes. | |
2589 | * Returns non-zero for success, zero for failure. | |
2590 | */ | |
c906108c | 2591 | |
c3f6f71d | 2592 | int |
fba45db2 | 2593 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2594 | { |
2595 | int win; | |
2596 | ||
2597 | /* | |
2598 | * We should never have to apply this operation to any procinfo | |
2599 | * except the one for the main process. If that ever changes | |
19958708 | 2600 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2601 | * replace it with one that makes sure the ctl_fd is open. |
2602 | */ | |
19958708 | 2603 | |
c3f6f71d JM |
2604 | if (pi->tid != 0) |
2605 | pi = find_procinfo_or_die (pi->pid, 0); | |
2606 | ||
2607 | #ifdef NEW_PROC_API | |
2608 | { | |
2609 | struct { | |
37de36c6 | 2610 | procfs_ctl_t cmd; |
c3f6f71d | 2611 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2612 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2613 | } arg; |
37de36c6 | 2614 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2615 | |
2616 | arg.cmd = PCSSIG; | |
2617 | /* The pointer is just a type alias. */ | |
37de36c6 | 2618 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2619 | mysinfo->si_signo = 0; |
2620 | mysinfo->si_code = 0; | |
2621 | mysinfo->si_errno = 0; | |
2622 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2623 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2624 | ||
2625 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2626 | } | |
2627 | #else | |
2628 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2629 | #endif | |
c906108c | 2630 | |
c3f6f71d JM |
2631 | return win; |
2632 | } | |
c906108c | 2633 | |
772cf8be MK |
2634 | /* Return the general-purpose registers for the process or LWP |
2635 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2636 | |
c3f6f71d | 2637 | gdb_gregset_t * |
fba45db2 | 2638 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2639 | { |
2640 | if (!pi->status_valid || !pi->gregs_valid) | |
2641 | if (!proc_get_status (pi)) | |
2642 | return NULL; | |
2643 | ||
772cf8be MK |
2644 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2645 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2646 | |
2647 | #ifdef NEW_PROC_API | |
772cf8be | 2648 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2649 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2650 | # else |
c3f6f71d | 2651 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2652 | # endif |
2653 | #else | |
c3f6f71d | 2654 | return &pi->prstatus.pr_reg; |
772cf8be | 2655 | #endif |
c3f6f71d | 2656 | } |
c5aa993b | 2657 | |
772cf8be MK |
2658 | /* Return the general-purpose registers for the process or LWP |
2659 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2660 | |
c3f6f71d | 2661 | gdb_fpregset_t * |
fba45db2 | 2662 | proc_get_fpregs (procinfo *pi) |
c906108c | 2663 | { |
c3f6f71d JM |
2664 | #ifdef NEW_PROC_API |
2665 | if (!pi->status_valid || !pi->fpregs_valid) | |
2666 | if (!proc_get_status (pi)) | |
2667 | return NULL; | |
2668 | ||
772cf8be | 2669 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2670 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2671 | # else |
c3f6f71d | 2672 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2673 | # endif |
c5aa993b | 2674 | |
772cf8be | 2675 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2676 | if (pi->fpregs_valid) |
772cf8be | 2677 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2678 | else |
c906108c | 2679 | { |
772cf8be | 2680 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2681 | { |
c3f6f71d | 2682 | return NULL; |
c906108c | 2683 | } |
c3f6f71d | 2684 | else |
c906108c | 2685 | { |
772cf8be | 2686 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2687 | struct { |
2688 | long pr_count; | |
2689 | tid_t pr_error_thread; | |
2690 | tfpregset_t thread_1; | |
2691 | } thread_fpregs; | |
2692 | ||
2693 | thread_fpregs.pr_count = 1; | |
2694 | thread_fpregs.thread_1.tid = pi->tid; | |
2695 | ||
772cf8be MK |
2696 | if (pi->tid == 0 |
2697 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2698 | { |
2699 | pi->fpregs_valid = 1; | |
772cf8be | 2700 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2701 | } |
772cf8be MK |
2702 | else if (pi->tid != 0 |
2703 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2704 | { |
2705 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2706 | sizeof (pi->fpregset)); | |
2707 | pi->fpregs_valid = 1; | |
772cf8be | 2708 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2709 | } |
2710 | else | |
2711 | { | |
2712 | return NULL; | |
2713 | } | |
772cf8be | 2714 | # else |
c3f6f71d JM |
2715 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2716 | { | |
2717 | pi->fpregs_valid = 1; | |
772cf8be | 2718 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2719 | } |
2720 | else | |
2721 | { | |
2722 | return NULL; | |
2723 | } | |
772cf8be | 2724 | # endif |
c906108c | 2725 | } |
c906108c | 2726 | } |
772cf8be | 2727 | #endif /* NEW_PROC_API */ |
c906108c SS |
2728 | } |
2729 | ||
772cf8be MK |
2730 | /* Write the general-purpose registers back to the process or LWP |
2731 | corresponding to PI. Return non-zero for success, zero for | |
2732 | failure. */ | |
c3f6f71d JM |
2733 | |
2734 | int | |
fba45db2 | 2735 | proc_set_gregs (procinfo *pi) |
c906108c | 2736 | { |
c3f6f71d JM |
2737 | gdb_gregset_t *gregs; |
2738 | int win; | |
c5aa993b | 2739 | |
772cf8be MK |
2740 | gregs = proc_get_gregs (pi); |
2741 | if (gregs == NULL) | |
2742 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2743 | |
772cf8be | 2744 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2745 | { |
c3f6f71d | 2746 | return 0; |
c906108c | 2747 | } |
c3f6f71d | 2748 | else |
c906108c | 2749 | { |
c3f6f71d JM |
2750 | #ifdef NEW_PROC_API |
2751 | struct { | |
37de36c6 | 2752 | procfs_ctl_t cmd; |
c3f6f71d JM |
2753 | /* Use char array to avoid alignment issues. */ |
2754 | char gregs[sizeof (gdb_gregset_t)]; | |
2755 | } arg; | |
2756 | ||
772cf8be | 2757 | arg.cmd = PCSREG; |
c3f6f71d JM |
2758 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2759 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2760 | #else | |
2761 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2762 | #endif | |
c906108c | 2763 | } |
c3f6f71d | 2764 | |
772cf8be | 2765 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2766 | pi->gregs_valid = 0; |
2767 | return win; | |
c906108c SS |
2768 | } |
2769 | ||
772cf8be MK |
2770 | /* Write the floating-pointer registers back to the process or LWP |
2771 | corresponding to PI. Return non-zero for success, zero for | |
2772 | failure. */ | |
c3f6f71d JM |
2773 | |
2774 | int | |
fba45db2 | 2775 | proc_set_fpregs (procinfo *pi) |
c906108c | 2776 | { |
c3f6f71d JM |
2777 | gdb_fpregset_t *fpregs; |
2778 | int win; | |
2779 | ||
772cf8be MK |
2780 | fpregs = proc_get_fpregs (pi); |
2781 | if (fpregs == NULL) | |
2782 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2783 | |
772cf8be | 2784 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2785 | { |
c3f6f71d | 2786 | return 0; |
c906108c | 2787 | } |
c3f6f71d | 2788 | else |
c906108c | 2789 | { |
c3f6f71d JM |
2790 | #ifdef NEW_PROC_API |
2791 | struct { | |
37de36c6 | 2792 | procfs_ctl_t cmd; |
c3f6f71d JM |
2793 | /* Use char array to avoid alignment issues. */ |
2794 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2795 | } arg; | |
2796 | ||
772cf8be | 2797 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2798 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2799 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2800 | #else | |
772cf8be | 2801 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2802 | if (pi->tid == 0) |
2803 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2804 | else | |
2805 | { | |
2806 | struct { | |
2807 | long pr_count; | |
2808 | tid_t pr_error_thread; | |
2809 | tfpregset_t thread_1; | |
2810 | } thread_fpregs; | |
2811 | ||
2812 | thread_fpregs.pr_count = 1; | |
2813 | thread_fpregs.thread_1.tid = pi->tid; | |
2814 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2815 | sizeof (*fpregs)); | |
2816 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2817 | } | |
772cf8be | 2818 | # else |
c3f6f71d | 2819 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2820 | # endif |
2821 | #endif /* NEW_PROC_API */ | |
c906108c | 2822 | } |
c3f6f71d | 2823 | |
772cf8be | 2824 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2825 | pi->fpregs_valid = 0; |
2826 | return win; | |
c906108c SS |
2827 | } |
2828 | ||
2829 | /* | |
c3f6f71d JM |
2830 | * Function: proc_kill |
2831 | * | |
2832 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2833 | * Returns non-zero for success, zero for failure. | |
2834 | */ | |
c906108c | 2835 | |
c3f6f71d | 2836 | int |
fba45db2 | 2837 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2838 | { |
2839 | int win; | |
c906108c | 2840 | |
c3f6f71d JM |
2841 | /* |
2842 | * We might conceivably apply this operation to an LWP, and | |
2843 | * the LWP's ctl file descriptor might not be open. | |
2844 | */ | |
c906108c | 2845 | |
c3f6f71d JM |
2846 | if (pi->ctl_fd == 0 && |
2847 | open_procinfo_files (pi, FD_CTL) == 0) | |
2848 | { | |
2849 | return 0; | |
2850 | } | |
2851 | else | |
2852 | { | |
2853 | #ifdef NEW_PROC_API | |
37de36c6 | 2854 | procfs_ctl_t cmd[2]; |
c906108c | 2855 | |
c3f6f71d JM |
2856 | cmd[0] = PCKILL; |
2857 | cmd[1] = signo; | |
2858 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2859 | #else /* ioctl method */ | |
2860 | /* FIXME: do I need the Alpha OSF fixups present in | |
2861 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2862 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2863 | #endif | |
2864 | } | |
c906108c | 2865 | |
c3f6f71d JM |
2866 | return win; |
2867 | } | |
c906108c | 2868 | |
c3f6f71d JM |
2869 | /* |
2870 | * Function: proc_parent_pid | |
2871 | * | |
2872 | * Find the pid of the process that started this one. | |
2873 | * Returns the parent process pid, or zero. | |
c906108c SS |
2874 | */ |
2875 | ||
c3f6f71d | 2876 | int |
fba45db2 | 2877 | proc_parent_pid (procinfo *pi) |
c906108c | 2878 | { |
c3f6f71d JM |
2879 | /* |
2880 | * We should never have to apply this operation to any procinfo | |
2881 | * except the one for the main process. If that ever changes | |
19958708 | 2882 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2883 | * replace it with one that makes sure the ctl_fd is open. |
2884 | */ | |
19958708 | 2885 | |
c3f6f71d JM |
2886 | if (pi->tid != 0) |
2887 | pi = find_procinfo_or_die (pi->pid, 0); | |
2888 | ||
2889 | if (!pi->status_valid) | |
2890 | if (!proc_get_status (pi)) | |
2891 | return 0; | |
c5aa993b | 2892 | |
c3f6f71d JM |
2893 | return pi->prstatus.pr_ppid; |
2894 | } | |
2895 | ||
2896 | ||
9a043c1d AC |
2897 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2898 | (a.k.a void pointer)! */ | |
2899 | ||
2900 | static void * | |
2901 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2902 | { | |
4e906f53 | 2903 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2904 | void *ptr; |
2905 | ||
4e906f53 | 2906 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2907 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2908 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2909 | return ptr; |
2910 | } | |
2911 | ||
c3f6f71d JM |
2912 | /* |
2913 | * Function: proc_set_watchpoint | |
2914 | * | |
2915 | */ | |
2916 | ||
2917 | int | |
fba45db2 | 2918 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2919 | { |
19958708 | 2920 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) |
c3f6f71d JM |
2921 | return 0; |
2922 | #else | |
2923 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2924 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2925 | return 0; | |
2926 | #else | |
2927 | struct { | |
37de36c6 | 2928 | procfs_ctl_t cmd; |
c3f6f71d JM |
2929 | char watch[sizeof (prwatch_t)]; |
2930 | } arg; | |
2931 | prwatch_t *pwatch; | |
2932 | ||
2933 | pwatch = (prwatch_t *) &arg.watch; | |
9a043c1d AC |
2934 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2935 | convert a target address into something that can be stored in a | |
2936 | native data structure. */ | |
831e682e | 2937 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
9a043c1d | 2938 | pwatch->pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2939 | #else |
9a043c1d | 2940 | pwatch->pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2941 | #endif |
c3f6f71d JM |
2942 | pwatch->pr_size = len; |
2943 | pwatch->pr_wflags = wflags; | |
2944 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2945 | arg.cmd = PCWATCH; | |
2946 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2947 | #else | |
2948 | #if defined (PIOCSWATCH) | |
2949 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2950 | #else | |
2951 | return 0; /* Fail */ | |
2952 | #endif | |
2953 | #endif | |
2954 | #endif | |
2955 | #endif | |
c906108c SS |
2956 | } |
2957 | ||
965b60ee | 2958 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2959 | |
c3f6f71d | 2960 | #include <sys/sysi86.h> |
c906108c | 2961 | |
c3f6f71d JM |
2962 | /* |
2963 | * Function: proc_get_LDT_entry | |
2964 | * | |
2965 | * Inputs: | |
2966 | * procinfo *pi; | |
2967 | * int key; | |
2968 | * | |
2969 | * The 'key' is actually the value of the lower 16 bits of | |
2970 | * the GS register for the LWP that we're interested in. | |
2971 | * | |
2972 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2973 | */ |
2974 | ||
c3f6f71d | 2975 | struct ssd * |
fba45db2 | 2976 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2977 | { |
c3f6f71d JM |
2978 | static struct ssd *ldt_entry = NULL; |
2979 | #ifdef NEW_PROC_API | |
2980 | char pathname[MAX_PROC_NAME_SIZE]; | |
2981 | struct cleanup *old_chain = NULL; | |
2982 | int fd; | |
2983 | ||
2984 | /* Allocate space for one LDT entry. | |
2985 | This alloc must persist, because we return a pointer to it. */ | |
2986 | if (ldt_entry == NULL) | |
2987 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2988 | ||
2989 | /* Open the file descriptor for the LDT table. */ | |
2990 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2991 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2992 | { |
c3f6f71d JM |
2993 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2994 | return NULL; | |
c906108c | 2995 | } |
c3f6f71d | 2996 | /* Make sure it gets closed again! */ |
004527cb | 2997 | old_chain = make_cleanup_close (fd); |
c906108c | 2998 | |
c3f6f71d JM |
2999 | /* Now 'read' thru the table, find a match and return it. */ |
3000 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 3001 | { |
c3f6f71d JM |
3002 | if (ldt_entry->sel == 0 && |
3003 | ldt_entry->bo == 0 && | |
3004 | ldt_entry->acc1 == 0 && | |
3005 | ldt_entry->acc2 == 0) | |
3006 | break; /* end of table */ | |
3007 | /* If key matches, return this entry. */ | |
3008 | if (ldt_entry->sel == key) | |
3009 | return ldt_entry; | |
c906108c | 3010 | } |
c3f6f71d JM |
3011 | /* Loop ended, match not found. */ |
3012 | return NULL; | |
3013 | #else | |
3014 | int nldt, i; | |
3015 | static int nalloc = 0; | |
c906108c | 3016 | |
c3f6f71d JM |
3017 | /* Get the number of LDT entries. */ |
3018 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 3019 | { |
c3f6f71d JM |
3020 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
3021 | return NULL; | |
c906108c SS |
3022 | } |
3023 | ||
c3f6f71d JM |
3024 | /* Allocate space for the number of LDT entries. */ |
3025 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
3026 | if (nldt > nalloc) | |
c906108c | 3027 | { |
19958708 | 3028 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
3029 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
3030 | nalloc = nldt; | |
3031 | } | |
19958708 | 3032 | |
c3f6f71d JM |
3033 | /* Read the whole table in one gulp. */ |
3034 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
3035 | { | |
3036 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
3037 | return NULL; | |
c906108c SS |
3038 | } |
3039 | ||
c3f6f71d JM |
3040 | /* Search the table and return the (first) entry matching 'key'. */ |
3041 | for (i = 0; i < nldt; i++) | |
3042 | if (ldt_entry[i].sel == key) | |
3043 | return &ldt_entry[i]; | |
c906108c | 3044 | |
c3f6f71d JM |
3045 | /* Loop ended, match not found. */ |
3046 | return NULL; | |
3047 | #endif | |
3048 | } | |
c906108c | 3049 | |
965b60ee JB |
3050 | /* |
3051 | * Function: procfs_find_LDT_entry | |
3052 | * | |
3053 | * Input: | |
3054 | * ptid_t ptid; // The GDB-style pid-plus-LWP. | |
3055 | * | |
3056 | * Return: | |
3057 | * pointer to the corresponding LDT entry. | |
3058 | */ | |
3059 | ||
3060 | struct ssd * | |
3061 | procfs_find_LDT_entry (ptid_t ptid) | |
3062 | { | |
3063 | gdb_gregset_t *gregs; | |
3064 | int key; | |
3065 | procinfo *pi; | |
3066 | ||
3067 | /* Find procinfo for the lwp. */ | |
3068 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) | |
3069 | { | |
0b62613e | 3070 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
3071 | PIDGET (ptid), TIDGET (ptid)); |
3072 | return NULL; | |
3073 | } | |
3074 | /* get its general registers. */ | |
3075 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3076 | { | |
0b62613e | 3077 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
3078 | PIDGET (ptid), TIDGET (ptid)); |
3079 | return NULL; | |
3080 | } | |
3081 | /* Now extract the GS register's lower 16 bits. */ | |
3082 | key = (*gregs)[GS] & 0xffff; | |
3083 | ||
3084 | /* Find the matching entry and return it. */ | |
3085 | return proc_get_LDT_entry (pi, key); | |
3086 | } | |
3087 | ||
3088 | #endif | |
c906108c | 3089 | |
c3f6f71d | 3090 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 3091 | |
c3f6f71d | 3092 | /* =================== Thread "MODULE" =================== */ |
c906108c | 3093 | |
c3f6f71d JM |
3094 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
3095 | since there is a different way to do threads on every OS. */ | |
c906108c | 3096 | |
c3f6f71d | 3097 | /* |
19958708 | 3098 | * Function: proc_get_nthreads |
c3f6f71d | 3099 | * |
19958708 | 3100 | * Return the number of threads for the process |
c3f6f71d | 3101 | */ |
c906108c | 3102 | |
c3f6f71d JM |
3103 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
3104 | /* | |
3105 | * OSF version | |
3106 | */ | |
19958708 | 3107 | int |
fba45db2 | 3108 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
3109 | { |
3110 | int nthreads = 0; | |
c906108c | 3111 | |
c3f6f71d JM |
3112 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3113 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3114 | |
c3f6f71d | 3115 | return nthreads; |
c906108c SS |
3116 | } |
3117 | ||
c3f6f71d JM |
3118 | #else |
3119 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3120 | /* | |
3121 | * Solaris and Unixware version | |
3122 | */ | |
3123 | int | |
fba45db2 | 3124 | proc_get_nthreads (procinfo *pi) |
c906108c | 3125 | { |
c3f6f71d JM |
3126 | if (!pi->status_valid) |
3127 | if (!proc_get_status (pi)) | |
3128 | return 0; | |
c5aa993b | 3129 | |
c3f6f71d | 3130 | /* |
19958708 | 3131 | * NEW_PROC_API: only works for the process procinfo, |
c3f6f71d JM |
3132 | * because the LWP procinfos do not get prstatus filled in. |
3133 | */ | |
19958708 | 3134 | #ifdef NEW_PROC_API |
c3f6f71d JM |
3135 | if (pi->tid != 0) /* find the parent process procinfo */ |
3136 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3137 | #endif |
c3f6f71d | 3138 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3139 | } |
3140 | ||
c3f6f71d JM |
3141 | #else |
3142 | /* | |
3143 | * Default version | |
3144 | */ | |
3145 | int | |
fba45db2 | 3146 | proc_get_nthreads (procinfo *pi) |
c906108c | 3147 | { |
c3f6f71d JM |
3148 | return 0; |
3149 | } | |
3150 | #endif | |
3151 | #endif | |
3152 | ||
3153 | /* | |
3154 | * Function: proc_get_current_thread (LWP version) | |
3155 | * | |
3156 | * Return the ID of the thread that had an event of interest. | |
3157 | * (ie. the one that hit a breakpoint or other traced event). | |
3158 | * All other things being equal, this should be the ID of a | |
3159 | * thread that is currently executing. | |
3160 | */ | |
3161 | ||
3162 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3163 | /* | |
3164 | * Solaris and Unixware version | |
3165 | */ | |
3166 | int | |
fba45db2 | 3167 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3168 | { |
3169 | /* | |
3170 | * Note: this should be applied to the root procinfo for the process, | |
3171 | * not to the procinfo for an LWP. If applied to the procinfo for | |
19958708 | 3172 | * an LWP, it will simply return that LWP's ID. In that case, |
c3f6f71d JM |
3173 | * find the parent process procinfo. |
3174 | */ | |
19958708 | 3175 | |
c3f6f71d JM |
3176 | if (pi->tid != 0) |
3177 | pi = find_procinfo_or_die (pi->pid, 0); | |
3178 | ||
3179 | if (!pi->status_valid) | |
3180 | if (!proc_get_status (pi)) | |
3181 | return 0; | |
3182 | ||
3183 | #ifdef NEW_PROC_API | |
3184 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3185 | #else |
c3f6f71d | 3186 | return pi->prstatus.pr_who; |
c906108c | 3187 | #endif |
c3f6f71d | 3188 | } |
c906108c | 3189 | |
c3f6f71d JM |
3190 | #else |
3191 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3192 | /* | |
3193 | * OSF version | |
3194 | */ | |
19958708 | 3195 | int |
fba45db2 | 3196 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3197 | { |
3198 | #if 0 /* FIXME: not ready for prime time? */ | |
3199 | return pi->prstatus.pr_tid; | |
3200 | #else | |
3201 | return 0; | |
3202 | #endif | |
c906108c SS |
3203 | } |
3204 | ||
c3f6f71d JM |
3205 | #else |
3206 | /* | |
3207 | * Default version | |
3208 | */ | |
19958708 | 3209 | int |
fba45db2 | 3210 | proc_get_current_thread (procinfo *pi) |
c906108c | 3211 | { |
c3f6f71d JM |
3212 | return 0; |
3213 | } | |
3214 | ||
3215 | #endif | |
3216 | #endif | |
c906108c | 3217 | |
c3f6f71d | 3218 | /* |
19958708 | 3219 | * Function: proc_update_threads |
c3f6f71d JM |
3220 | * |
3221 | * Discover the IDs of all the threads within the process, and | |
3222 | * create a procinfo for each of them (chained to the parent). | |
3223 | * | |
3224 | * This unfortunately requires a different method on every OS. | |
3225 | * | |
3226 | * Return: non-zero for success, zero for failure. | |
3227 | */ | |
c906108c | 3228 | |
c3f6f71d | 3229 | int |
fba45db2 | 3230 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3231 | { |
3232 | if (thread && parent) /* sanity */ | |
c906108c | 3233 | { |
c3f6f71d JM |
3234 | thread->status_valid = 0; |
3235 | if (!proc_get_status (thread)) | |
3236 | destroy_one_procinfo (&parent->thread_list, thread); | |
3237 | } | |
3238 | return 0; /* keep iterating */ | |
3239 | } | |
c5aa993b | 3240 | |
c3f6f71d JM |
3241 | #if defined (PIOCLSTATUS) |
3242 | /* | |
3243 | * Solaris 2.5 (ioctl) version | |
3244 | */ | |
3245 | int | |
fba45db2 | 3246 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3247 | { |
3248 | gdb_prstatus_t *prstatus; | |
3249 | struct cleanup *old_chain = NULL; | |
3250 | procinfo *thread; | |
3251 | int nlwp, i; | |
3252 | ||
3253 | /* | |
3254 | * We should never have to apply this operation to any procinfo | |
3255 | * except the one for the main process. If that ever changes | |
19958708 | 3256 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3257 | * replace it with one that makes sure the ctl_fd is open. |
3258 | */ | |
19958708 | 3259 | |
c3f6f71d JM |
3260 | if (pi->tid != 0) |
3261 | pi = find_procinfo_or_die (pi->pid, 0); | |
3262 | ||
3263 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3264 | ||
3265 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3266 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3267 | ||
3c37485b | 3268 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3269 | |
b8c9b27d | 3270 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3271 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3272 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3273 | ||
3274 | /* Skip element zero, which represents the process as a whole. */ | |
3275 | for (i = 1; i < nlwp + 1; i++) | |
3276 | { | |
3277 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3278 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3279 | |
c3f6f71d JM |
3280 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3281 | thread->status_valid = 1; | |
3282 | } | |
3283 | pi->threads_valid = 1; | |
3284 | do_cleanups (old_chain); | |
3285 | return 1; | |
3286 | } | |
3287 | #else | |
3288 | #ifdef NEW_PROC_API | |
3289 | /* | |
3290 | * Unixware and Solaris 6 (and later) version | |
3291 | */ | |
004527cb AC |
3292 | static void |
3293 | do_closedir_cleanup (void *dir) | |
3294 | { | |
3295 | closedir (dir); | |
3296 | } | |
3297 | ||
c3f6f71d | 3298 | int |
fba45db2 | 3299 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3300 | { |
3301 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3302 | struct dirent *direntry; | |
3303 | struct cleanup *old_chain = NULL; | |
3304 | procinfo *thread; | |
3305 | DIR *dirp; | |
3306 | int lwpid; | |
3307 | ||
3308 | /* | |
3309 | * We should never have to apply this operation to any procinfo | |
3310 | * except the one for the main process. If that ever changes | |
19958708 | 3311 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3312 | * replace it with one that makes sure the ctl_fd is open. |
3313 | */ | |
19958708 | 3314 | |
c3f6f71d JM |
3315 | if (pi->tid != 0) |
3316 | pi = find_procinfo_or_die (pi->pid, 0); | |
3317 | ||
3318 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3319 | ||
3320 | /* | |
3321 | * Unixware | |
3322 | * | |
19958708 RM |
3323 | * Note: this brute-force method is the only way I know of |
3324 | * to accomplish this task on Unixware. This method will | |
c3f6f71d JM |
3325 | * also work on Solaris 2.6 and 2.7. There is a much simpler |
3326 | * and more elegant way to do this on Solaris, but the margins | |
3327 | * of this manuscript are too small to write it here... ;-) | |
3328 | */ | |
3329 | ||
3330 | strcpy (pathname, pi->pathname); | |
3331 | strcat (pathname, "/lwp"); | |
3332 | if ((dirp = opendir (pathname)) == NULL) | |
3333 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3334 | ||
004527cb | 3335 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3336 | while ((direntry = readdir (dirp)) != NULL) |
3337 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3338 | { | |
3339 | lwpid = atoi (&direntry->d_name[0]); | |
3340 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3341 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3342 | } | |
3343 | pi->threads_valid = 1; | |
3344 | do_cleanups (old_chain); | |
3345 | return 1; | |
3346 | } | |
3347 | #else | |
3348 | #ifdef PIOCTLIST | |
3349 | /* | |
3350 | * OSF version | |
3351 | */ | |
19958708 | 3352 | int |
fba45db2 | 3353 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3354 | { |
3355 | int nthreads, i; | |
3356 | tid_t *threads; | |
3357 | ||
3358 | /* | |
3359 | * We should never have to apply this operation to any procinfo | |
3360 | * except the one for the main process. If that ever changes | |
19958708 | 3361 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3362 | * replace it with one that makes sure the ctl_fd is open. |
3363 | */ | |
19958708 | 3364 | |
c3f6f71d JM |
3365 | if (pi->tid != 0) |
3366 | pi = find_procinfo_or_die (pi->pid, 0); | |
3367 | ||
3368 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3369 | ||
3370 | nthreads = proc_get_nthreads (pi); | |
3371 | if (nthreads < 2) | |
3372 | return 0; /* nothing to do for 1 or fewer threads */ | |
3373 | ||
3c37485b | 3374 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3375 | |
c3f6f71d JM |
3376 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3377 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3378 | ||
3379 | for (i = 0; i < nthreads; i++) | |
3380 | { | |
3381 | if (!find_procinfo (pi->pid, threads[i])) | |
3382 | if (!create_procinfo (pi->pid, threads[i])) | |
3383 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3384 | } |
c3f6f71d JM |
3385 | pi->threads_valid = 1; |
3386 | return 1; | |
c906108c | 3387 | } |
c3f6f71d JM |
3388 | #else |
3389 | /* | |
3390 | * Default version | |
3391 | */ | |
3392 | int | |
fba45db2 | 3393 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3394 | { |
3395 | return 0; | |
3396 | } | |
3397 | #endif /* OSF PIOCTLIST */ | |
3398 | #endif /* NEW_PROC_API */ | |
3399 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3400 | |
c3f6f71d JM |
3401 | /* |
3402 | * Function: proc_iterate_over_threads | |
3403 | * | |
3404 | * Description: | |
3405 | * Given a pointer to a function, call that function once | |
3406 | * for each lwp in the procinfo list, until the function | |
3407 | * returns non-zero, in which event return the value | |
3408 | * returned by the function. | |
3409 | * | |
3410 | * Note: this function does NOT call update_threads. | |
3411 | * If you want to discover new threads first, you must | |
3412 | * call that function explicitly. This function just makes | |
19958708 RM |
3413 | * a quick pass over the currently-known procinfos. |
3414 | * | |
c3f6f71d JM |
3415 | * Arguments: |
3416 | * pi - parent process procinfo | |
3417 | * func - per-thread function | |
3418 | * ptr - opaque parameter for function. | |
3419 | * | |
3420 | * Return: | |
3421 | * First non-zero return value from the callee, or zero. | |
3422 | */ | |
3423 | ||
3424 | int | |
d0849a9a KB |
3425 | proc_iterate_over_threads (procinfo *pi, |
3426 | int (*func) (procinfo *, procinfo *, void *), | |
3427 | void *ptr) | |
c906108c | 3428 | { |
c3f6f71d JM |
3429 | procinfo *thread, *next; |
3430 | int retval = 0; | |
c906108c | 3431 | |
c3f6f71d JM |
3432 | /* |
3433 | * We should never have to apply this operation to any procinfo | |
3434 | * except the one for the main process. If that ever changes | |
19958708 | 3435 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3436 | * replace it with one that makes sure the ctl_fd is open. |
3437 | */ | |
19958708 | 3438 | |
c3f6f71d JM |
3439 | if (pi->tid != 0) |
3440 | pi = find_procinfo_or_die (pi->pid, 0); | |
3441 | ||
3442 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3443 | { |
c3f6f71d JM |
3444 | next = thread->next; /* in case thread is destroyed */ |
3445 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3446 | break; | |
c906108c | 3447 | } |
c3f6f71d JM |
3448 | |
3449 | return retval; | |
c906108c SS |
3450 | } |
3451 | ||
c3f6f71d JM |
3452 | /* =================== END, Thread "MODULE" =================== */ |
3453 | ||
3454 | /* =================== END, /proc "MODULE" =================== */ | |
3455 | ||
3456 | /* =================== GDB "MODULE" =================== */ | |
3457 | ||
3458 | /* | |
3459 | * Here are all of the gdb target vector functions and their friends. | |
3460 | */ | |
3461 | ||
39f77062 | 3462 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3463 | static void do_detach (int signo); |
37de36c6 | 3464 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
9185ddce JB |
3465 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
3466 | int entry_or_exit, int mode, int from_tty); | |
3467 | static int insert_dbx_link_breakpoint (procinfo *pi); | |
3468 | static void remove_dbx_link_breakpoint (void); | |
3469 | ||
3470 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3471 | the startup phase. The following two variables are used to record | |
3472 | the address of the breakpoint, and the code that was replaced by | |
3473 | a breakpoint. */ | |
3474 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3475 | static void *dbx_link_bpt; |
c3f6f71d JM |
3476 | |
3477 | /* | |
3478 | * Function: procfs_debug_inferior | |
3479 | * | |
3480 | * Sets up the inferior to be debugged. | |
3481 | * Registers to trace signals, hardware faults, and syscalls. | |
3482 | * Note: does not set RLC flag: caller may want to customize that. | |
3483 | * | |
3484 | * Returns: zero for success (note! unlike most functions in this module) | |
3485 | * On failure, returns the LINE NUMBER where it failed! | |
3486 | */ | |
3487 | ||
3488 | static int | |
fba45db2 | 3489 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3490 | { |
c3f6f71d | 3491 | fltset_t traced_faults; |
37de36c6 KB |
3492 | gdb_sigset_t traced_signals; |
3493 | sysset_t *traced_syscall_entries; | |
3494 | sysset_t *traced_syscall_exits; | |
3495 | int status; | |
c906108c | 3496 | |
c3f6f71d JM |
3497 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3498 | /* On some systems (OSF), we don't trace hardware faults. | |
3499 | Apparently it's enough that we catch them as signals. | |
3500 | Wonder why we don't just do that in general? */ | |
3501 | premptyset (&traced_faults); /* don't trace faults. */ | |
3502 | #else | |
3503 | /* Register to trace hardware faults in the child. */ | |
3504 | prfillset (&traced_faults); /* trace all faults... */ | |
3505 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3506 | #endif | |
3507 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3508 | return __LINE__; | |
c906108c | 3509 | |
c3f6f71d JM |
3510 | /* Register to trace selected signals in the child. */ |
3511 | premptyset (&traced_signals); | |
3512 | if (!register_gdb_signals (pi, &traced_signals)) | |
3513 | return __LINE__; | |
3514 | ||
37de36c6 | 3515 | |
c3f6f71d | 3516 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3517 | traced_syscall_entries = sysset_t_alloc (pi); |
3518 | gdb_premptysysset (traced_syscall_entries); | |
3519 | #ifdef SYS_exit | |
3520 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3521 | #endif | |
c3f6f71d | 3522 | #ifdef SYS_lwpexit |
37de36c6 | 3523 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3524 | #endif |
3525 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3526 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3527 | #endif | |
3528 | #ifdef DYNAMIC_SYSCALLS | |
3529 | { | |
3530 | int callnum = find_syscall (pi, "_exit"); | |
3531 | if (callnum >= 0) | |
3532 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3533 | } | |
c906108c SS |
3534 | #endif |
3535 | ||
37de36c6 KB |
3536 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3537 | xfree (traced_syscall_entries); | |
3538 | if (!status) | |
c3f6f71d JM |
3539 | return __LINE__; |
3540 | ||
3541 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3542 | /* OSF method for tracing exec syscalls. Quoting: | |
3543 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3544 | exits from exec system calls because of the user level loader. */ | |
3545 | /* FIXME: make nice and maybe move into an access function. */ | |
3546 | { | |
3547 | int prfs_flags; | |
3548 | ||
3549 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3550 | return __LINE__; | |
3551 | ||
3552 | prfs_flags |= PRFS_STOPEXEC; | |
3553 | ||
3554 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3555 | return __LINE__; | |
3556 | } | |
3557 | #else /* not PRFS_STOPEXEC */ | |
3558 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3559 | /* GW: Rationale... | |
3560 | Not all systems with /proc have all the exec* syscalls with the same | |
3561 | names. On the SGI, for example, there is no SYS_exec, but there | |
3562 | *is* a SYS_execv. So, we try to account for that. */ | |
3563 | ||
37de36c6 KB |
3564 | traced_syscall_exits = sysset_t_alloc (pi); |
3565 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3566 | #ifdef SYS_exec |
37de36c6 | 3567 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3568 | #endif |
3569 | #ifdef SYS_execve | |
37de36c6 | 3570 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3571 | #endif |
3572 | #ifdef SYS_execv | |
37de36c6 | 3573 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3574 | #endif |
c5aa993b | 3575 | |
c3f6f71d | 3576 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3577 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3578 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3579 | #endif |
c5aa993b | 3580 | |
c3f6f71d | 3581 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3582 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3583 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3584 | #endif |
c5aa993b | 3585 | |
37de36c6 KB |
3586 | #ifdef DYNAMIC_SYSCALLS |
3587 | { | |
3588 | int callnum = find_syscall (pi, "execve"); | |
3589 | if (callnum >= 0) | |
3590 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3591 | callnum = find_syscall (pi, "ra_execve"); | |
3592 | if (callnum >= 0) | |
3593 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3594 | } | |
3595 | #endif | |
c906108c | 3596 | |
37de36c6 KB |
3597 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3598 | xfree (traced_syscall_exits); | |
3599 | if (!status) | |
c3f6f71d JM |
3600 | return __LINE__; |
3601 | ||
3602 | #endif /* PRFS_STOPEXEC */ | |
3603 | return 0; | |
c906108c SS |
3604 | } |
3605 | ||
19958708 | 3606 | static void |
136d6dae | 3607 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3608 | { |
c3f6f71d JM |
3609 | char *exec_file; |
3610 | int pid; | |
3611 | ||
3612 | if (!args) | |
e2e0b3e5 | 3613 | error_no_arg (_("process-id to attach")); |
c3f6f71d JM |
3614 | |
3615 | pid = atoi (args); | |
3616 | if (pid == getpid ()) | |
8a3fe4f8 | 3617 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3618 | |
c3f6f71d | 3619 | if (from_tty) |
c906108c | 3620 | { |
c3f6f71d JM |
3621 | exec_file = get_exec_file (0); |
3622 | ||
3623 | if (exec_file) | |
a3f17187 | 3624 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3625 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3626 | else |
a3f17187 | 3627 | printf_filtered (_("Attaching to %s\n"), |
39f77062 | 3628 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3629 | |
3630 | fflush (stdout); | |
c906108c | 3631 | } |
39f77062 | 3632 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
c3f6f71d JM |
3633 | push_target (&procfs_ops); |
3634 | } | |
3635 | ||
19958708 | 3636 | static void |
136d6dae | 3637 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3638 | { |
cc377e6b | 3639 | int sig = 0; |
7f9f62ba | 3640 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3641 | |
3642 | if (args) | |
3643 | sig = atoi (args); | |
c3f6f71d JM |
3644 | |
3645 | if (from_tty) | |
c906108c | 3646 | { |
cc377e6b MK |
3647 | char *exec_file; |
3648 | ||
c3f6f71d | 3649 | exec_file = get_exec_file (0); |
cc377e6b | 3650 | if (exec_file == NULL) |
c3f6f71d | 3651 | exec_file = ""; |
cc377e6b | 3652 | |
a3f17187 | 3653 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3654 | target_pid_to_str (pid_to_ptid (pid))); |
3655 | gdb_flush (gdb_stdout); | |
c906108c | 3656 | } |
19958708 | 3657 | |
cc377e6b MK |
3658 | do_detach (sig); |
3659 | ||
39f77062 | 3660 | inferior_ptid = null_ptid; |
7f9f62ba | 3661 | detach_inferior (pid); |
cc377e6b | 3662 | unpush_target (&procfs_ops); |
c906108c SS |
3663 | } |
3664 | ||
39f77062 KB |
3665 | static ptid_t |
3666 | do_attach (ptid_t ptid) | |
c906108c | 3667 | { |
c3f6f71d | 3668 | procinfo *pi; |
181e7f93 | 3669 | struct inferior *inf; |
c3f6f71d | 3670 | int fail; |
2689673f | 3671 | int lwpid; |
c3f6f71d | 3672 | |
39f77062 | 3673 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3674 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3675 | |
3676 | if (!open_procinfo_files (pi, FD_CTL)) | |
3677 | { | |
3678 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3679 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3680 | PIDGET (ptid)); |
c3f6f71d JM |
3681 | dead_procinfo (pi, errmsg, NOKILL); |
3682 | } | |
c906108c | 3683 | |
c3f6f71d JM |
3684 | /* Stop the process (if it isn't already stopped). */ |
3685 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3686 | { |
c3f6f71d JM |
3687 | pi->was_stopped = 1; |
3688 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3689 | } |
3690 | else | |
3691 | { | |
c3f6f71d JM |
3692 | pi->was_stopped = 0; |
3693 | /* Set the process to run again when we close it. */ | |
3694 | if (!proc_set_run_on_last_close (pi)) | |
3695 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3696 | ||
3697 | /* Now stop the process. */ | |
3698 | if (!proc_stop_process (pi)) | |
3699 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3700 | pi->ignore_next_sigstop = 1; | |
c906108c | 3701 | } |
c3f6f71d JM |
3702 | /* Save some of the /proc state to be restored if we detach. */ |
3703 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3704 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3705 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3706 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3707 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3708 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3709 | NOKILL); | |
37de36c6 | 3710 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3711 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3712 | NOKILL); |
3713 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3714 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3715 | ||
3716 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3717 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3718 | ||
181e7f93 | 3719 | inf = add_inferior (pi->pid); |
c3f6f71d | 3720 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3721 | inf->attach_flag = 1; |
2689673f PA |
3722 | |
3723 | /* Create a procinfo for the current lwp. */ | |
3724 | lwpid = proc_get_current_thread (pi); | |
3725 | create_procinfo (pi->pid, lwpid); | |
3726 | ||
3727 | /* Add it to gdb's thread list. */ | |
3728 | ptid = MERGEPID (pi->pid, lwpid); | |
3729 | add_thread (ptid); | |
3730 | ||
3731 | return ptid; | |
c906108c SS |
3732 | } |
3733 | ||
3734 | static void | |
fba45db2 | 3735 | do_detach (int signo) |
c906108c | 3736 | { |
c3f6f71d | 3737 | procinfo *pi; |
c906108c | 3738 | |
c3f6f71d | 3739 | /* Find procinfo for the main process */ |
39f77062 | 3740 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3741 | if (signo) |
3742 | if (!proc_set_current_signal (pi, signo)) | |
3743 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3744 | |
c3f6f71d JM |
3745 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3746 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3747 | |
c3f6f71d JM |
3748 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3749 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3750 | ||
37de36c6 | 3751 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3752 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3753 | ||
37de36c6 | 3754 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3755 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3756 | ||
3757 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3758 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3759 | ||
3760 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3761 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3762 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3763 | { |
3764 | /* Clear any pending signal. */ | |
3765 | if (!proc_clear_current_fault (pi)) | |
3766 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3767 | ||
1a303dec MS |
3768 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3769 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3770 | ||
c3f6f71d JM |
3771 | if (!proc_set_run_on_last_close (pi)) |
3772 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3773 | } | |
3774 | ||
c3f6f71d | 3775 | destroy_procinfo (pi); |
c906108c SS |
3776 | } |
3777 | ||
772cf8be MK |
3778 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3779 | for all registers. | |
3780 | ||
3781 | ??? Is the following note still relevant? We can't get individual | |
3782 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3783 | don't bother with caching at all in that case. | |
3784 | ||
3785 | NOTE: Since the /proc interface cannot give us individual | |
3786 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3787 | This results in the possibility that we will do unnecessarily many | |
3788 | fetches, since we may be called repeatedly for individual | |
3789 | registers. So we cache the results, and mark the cache invalid | |
3790 | when the process is resumed. */ | |
c3f6f71d | 3791 | |
c906108c | 3792 | static void |
56be3814 | 3793 | procfs_fetch_registers (struct regcache *regcache, int regnum) |
c906108c | 3794 | { |
772cf8be MK |
3795 | gdb_gregset_t *gregs; |
3796 | procinfo *pi; | |
3797 | int pid = PIDGET (inferior_ptid); | |
3798 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3799 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3800 | |
2689673f | 3801 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3802 | |
3803 | if (pi == NULL) | |
8a3fe4f8 | 3804 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3805 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3806 | |
772cf8be MK |
3807 | gregs = proc_get_gregs (pi); |
3808 | if (gregs == NULL) | |
c3f6f71d JM |
3809 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3810 | ||
56be3814 | 3811 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3812 | |
40a6adc1 | 3813 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3814 | { |
772cf8be MK |
3815 | gdb_fpregset_t *fpregs; |
3816 | ||
40a6adc1 MD |
3817 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3818 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3819 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3820 | return; /* Not a floating point register. */ |
c5aa993b | 3821 | |
772cf8be MK |
3822 | fpregs = proc_get_fpregs (pi); |
3823 | if (fpregs == NULL) | |
60054393 | 3824 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3825 | |
56be3814 | 3826 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3827 | } |
c906108c SS |
3828 | } |
3829 | ||
c3f6f71d JM |
3830 | /* Get ready to modify the registers array. On machines which store |
3831 | individual registers, this doesn't need to do anything. On | |
3832 | machines which store all the registers in one fell swoop, such as | |
3833 | /proc, this makes sure that registers contains all the registers | |
3834 | from the program being debugged. */ | |
3835 | ||
c906108c | 3836 | static void |
316f2060 | 3837 | procfs_prepare_to_store (struct regcache *regcache) |
c906108c | 3838 | { |
c906108c SS |
3839 | } |
3840 | ||
772cf8be MK |
3841 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3842 | this for all registers. | |
3843 | ||
3844 | NOTE: Since the /proc interface will not read individual registers, | |
3845 | we will cache these requests until the process is resumed, and only | |
3846 | then write them back to the inferior process. | |
3847 | ||
3848 | FIXME: is that a really bad idea? Have to think about cases where | |
3849 | writing one register might affect the value of others, etc. */ | |
c906108c | 3850 | |
c3f6f71d | 3851 | static void |
56be3814 | 3852 | procfs_store_registers (struct regcache *regcache, int regnum) |
c3f6f71d | 3853 | { |
772cf8be MK |
3854 | gdb_gregset_t *gregs; |
3855 | procinfo *pi; | |
3856 | int pid = PIDGET (inferior_ptid); | |
3857 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3858 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3859 | |
2689673f | 3860 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3861 | |
3862 | if (pi == NULL) | |
8a3fe4f8 | 3863 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3864 | target_pid_to_str (inferior_ptid)); |
c906108c | 3865 | |
772cf8be MK |
3866 | gregs = proc_get_gregs (pi); |
3867 | if (gregs == NULL) | |
c3f6f71d | 3868 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3869 | |
56be3814 | 3870 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3871 | if (!proc_set_gregs (pi)) |
3872 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3873 | |
40a6adc1 | 3874 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3875 | { |
772cf8be MK |
3876 | gdb_fpregset_t *fpregs; |
3877 | ||
40a6adc1 MD |
3878 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3879 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3880 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3881 | return; /* Not a floating point register. */ |
60054393 | 3882 | |
772cf8be MK |
3883 | fpregs = proc_get_fpregs (pi); |
3884 | if (fpregs == NULL) | |
60054393 MS |
3885 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3886 | ||
56be3814 | 3887 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3888 | if (!proc_set_fpregs (pi)) |
3889 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3890 | } | |
c3f6f71d | 3891 | } |
c906108c | 3892 | |
37de36c6 KB |
3893 | static int |
3894 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3895 | { | |
3896 | ||
3897 | #ifdef SYS_lwp_exit | |
3898 | if (scall == SYS_lwp_exit) | |
3899 | return 1; | |
3900 | #endif | |
3901 | #ifdef SYS_lwpexit | |
3902 | if (scall == SYS_lwpexit) | |
3903 | return 1; | |
3904 | #endif | |
3905 | return 0; | |
3906 | } | |
3907 | ||
3908 | static int | |
3909 | syscall_is_exit (procinfo *pi, int scall) | |
3910 | { | |
3911 | #ifdef SYS_exit | |
3912 | if (scall == SYS_exit) | |
3913 | return 1; | |
3914 | #endif | |
3915 | #ifdef DYNAMIC_SYSCALLS | |
3916 | if (find_syscall (pi, "_exit") == scall) | |
3917 | return 1; | |
3918 | #endif | |
3919 | return 0; | |
3920 | } | |
3921 | ||
3922 | static int | |
3923 | syscall_is_exec (procinfo *pi, int scall) | |
3924 | { | |
3925 | #ifdef SYS_exec | |
3926 | if (scall == SYS_exec) | |
3927 | return 1; | |
3928 | #endif | |
3929 | #ifdef SYS_execv | |
3930 | if (scall == SYS_execv) | |
3931 | return 1; | |
3932 | #endif | |
3933 | #ifdef SYS_execve | |
3934 | if (scall == SYS_execve) | |
3935 | return 1; | |
3936 | #endif | |
3937 | #ifdef DYNAMIC_SYSCALLS | |
3938 | if (find_syscall (pi, "_execve")) | |
3939 | return 1; | |
3940 | if (find_syscall (pi, "ra_execve")) | |
3941 | return 1; | |
3942 | #endif | |
3943 | return 0; | |
3944 | } | |
3945 | ||
3946 | static int | |
3947 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3948 | { | |
3949 | #ifdef SYS_lwp_create | |
3950 | if (scall == SYS_lwp_create) | |
3951 | return 1; | |
3952 | #endif | |
3953 | #ifdef SYS_lwpcreate | |
3954 | if (scall == SYS_lwpcreate) | |
3955 | return 1; | |
3956 | #endif | |
3957 | return 0; | |
3958 | } | |
3959 | ||
c3f6f71d JM |
3960 | /* |
3961 | * Function: target_wait | |
3962 | * | |
3963 | * Retrieve the next stop event from the child process. | |
3964 | * If child has not stopped yet, wait for it to stop. | |
3965 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3966 | * into gdb internal event codes. | |
3967 | * | |
3968 | * Return: id of process (and possibly thread) that incurred the event. | |
3969 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3970 | */ |
3971 | ||
39f77062 | 3972 | static ptid_t |
117de6a9 PA |
3973 | procfs_wait (struct target_ops *ops, |
3974 | ptid_t ptid, struct target_waitstatus *status) | |
c906108c | 3975 | { |
c3f6f71d JM |
3976 | /* First cut: loosely based on original version 2.1 */ |
3977 | procinfo *pi; | |
39f77062 KB |
3978 | int wstat; |
3979 | int temp_tid; | |
3980 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3981 | int why, what, flags; |
3982 | int retry = 0; | |
c906108c | 3983 | |
c3f6f71d | 3984 | wait_again: |
c906108c | 3985 | |
c3f6f71d JM |
3986 | retry++; |
3987 | wstat = 0; | |
39f77062 | 3988 | retval = pid_to_ptid (-1); |
c906108c | 3989 | |
c3f6f71d | 3990 | /* Find procinfo for main process */ |
39f77062 | 3991 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3992 | if (pi) |
c906108c | 3993 | { |
c3f6f71d JM |
3994 | /* We must assume that the status is stale now... */ |
3995 | pi->status_valid = 0; | |
3996 | pi->gregs_valid = 0; | |
3997 | pi->fpregs_valid = 0; | |
3998 | ||
3999 | #if 0 /* just try this out... */ | |
4000 | flags = proc_flags (pi); | |
4001 | why = proc_why (pi); | |
4002 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
4003 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
4004 | #endif | |
4005 | /* If child is not stopped, wait for it to stop. */ | |
4006 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
4007 | !proc_wait_for_stop (pi)) | |
c906108c | 4008 | { |
c3f6f71d JM |
4009 | /* wait_for_stop failed: has the child terminated? */ |
4010 | if (errno == ENOENT) | |
c906108c | 4011 | { |
39f77062 KB |
4012 | int wait_retval; |
4013 | ||
c3f6f71d | 4014 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 4015 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 4016 | |
39f77062 | 4017 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
8a3fe4f8 | 4018 | error (_("procfs: couldn't stop process %d: wait returned %d."), |
39f77062 | 4019 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
4020 | /* FIXME: might I not just use waitpid? |
4021 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 4022 | retval = pid_to_ptid (wait_retval); |
c906108c | 4023 | } |
d1566ff5 FN |
4024 | else if (errno == EINTR) |
4025 | goto wait_again; | |
c3f6f71d | 4026 | else |
c906108c | 4027 | { |
c3f6f71d JM |
4028 | /* Unknown error from wait_for_stop. */ |
4029 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 4030 | } |
c3f6f71d JM |
4031 | } |
4032 | else | |
4033 | { | |
4034 | /* This long block is reached if either: | |
4035 | a) the child was already stopped, or | |
4036 | b) we successfully waited for the child with wait_for_stop. | |
4037 | This block will analyze the /proc status, and translate it | |
4038 | into a waitstatus for GDB. | |
4039 | ||
4040 | If we actually had to call wait because the /proc file | |
19958708 | 4041 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
4042 | because we already have a waitstatus. */ |
4043 | ||
4044 | flags = proc_flags (pi); | |
4045 | why = proc_why (pi); | |
4046 | what = proc_what (pi); | |
4047 | ||
c3f6f71d | 4048 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4049 | { |
c3f6f71d JM |
4050 | #ifdef PR_ASYNC |
4051 | /* If it's running async (for single_thread control), | |
4052 | set it back to normal again. */ | |
4053 | if (flags & PR_ASYNC) | |
4054 | if (!proc_unset_async (pi)) | |
4055 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
4056 | #endif | |
4057 | ||
4058 | if (info_verbose) | |
4059 | proc_prettyprint_why (why, what, 1); | |
4060 | ||
4061 | /* The 'pid' we will return to GDB is composed of | |
4062 | the process ID plus the lwp ID. */ | |
4063 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
4064 | ||
4065 | switch (why) { | |
4066 | case PR_SIGNALLED: | |
4067 | wstat = (what << 8) | 0177; | |
4068 | break; | |
4069 | case PR_SYSENTRY: | |
37de36c6 | 4070 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 4071 | { |
17faa917 DJ |
4072 | if (print_thread_events) |
4073 | printf_unfiltered (_("[%s exited]\n"), | |
4074 | target_pid_to_str (retval)); | |
37de36c6 KB |
4075 | delete_thread (retval); |
4076 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4077 | return retval; | |
4078 | } | |
4079 | else if (syscall_is_exit (pi, what)) | |
4080 | { | |
181e7f93 PA |
4081 | struct inferior *inf; |
4082 | ||
37de36c6 KB |
4083 | /* Handle SYS_exit call only */ |
4084 | /* Stopped at entry to SYS_exit. | |
19958708 | 4085 | Make it runnable, resume it, then use |
37de36c6 | 4086 | the wait system call to get its exit code. |
19958708 | 4087 | Proc_run_process always clears the current |
37de36c6 KB |
4088 | fault and signal. |
4089 | Then return its exit status. */ | |
4090 | pi->status_valid = 0; | |
4091 | wstat = 0; | |
19958708 | 4092 | /* FIXME: what we should do is return |
37de36c6 KB |
4093 | TARGET_WAITKIND_SPURIOUS. */ |
4094 | if (!proc_run_process (pi, 0, 0)) | |
4095 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
4096 | |
4097 | inf = find_inferior_pid (pi->pid); | |
4098 | if (inf->attach_flag) | |
c3f6f71d | 4099 | { |
19958708 | 4100 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
4101 | return a "success" exit code. Bogus: what if |
4102 | it returns something else? */ | |
4103 | wstat = 0; | |
39f77062 | 4104 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
4105 | } |
4106 | else | |
4107 | { | |
4108 | int temp = wait (&wstat); | |
4109 | ||
4110 | /* FIXME: shouldn't I make sure I get the right | |
4111 | event from the right process? If (for | |
4112 | instance) I have killed an earlier inferior | |
4113 | process but failed to clean up after it | |
4114 | somehow, I could get its termination event | |
4115 | here. */ | |
4116 | ||
4117 | /* If wait returns -1, that's what we return to GDB. */ | |
4118 | if (temp < 0) | |
39f77062 | 4119 | retval = pid_to_ptid (temp); |
c3f6f71d | 4120 | } |
c3f6f71d | 4121 | } |
37de36c6 KB |
4122 | else |
4123 | { | |
a3f17187 | 4124 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
4125 | proc_prettyprint_syscall (proc_what (pi), 0); |
4126 | printf_filtered ("\n"); | |
4127 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4128 | { |
37de36c6 | 4129 | long i, nsysargs, *sysargs; |
c3f6f71d | 4130 | |
37de36c6 KB |
4131 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4132 | (sysargs = proc_sysargs (pi)) != NULL) | |
4133 | { | |
a3f17187 | 4134 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 4135 | for (i = 0; i < nsysargs; i++) |
19958708 | 4136 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4137 | i, sysargs[i]); |
4138 | } | |
c3f6f71d | 4139 | |
c3f6f71d | 4140 | } |
c3f6f71d | 4141 | #endif |
37de36c6 KB |
4142 | if (status) |
4143 | { | |
4144 | /* How to exit gracefully, returning "unknown event" */ | |
4145 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4146 | return inferior_ptid; |
37de36c6 KB |
4147 | } |
4148 | else | |
4149 | { | |
4150 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4151 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4152 | goto wait_again; |
4153 | } | |
4154 | } | |
4155 | break; | |
4156 | case PR_SYSEXIT: | |
4157 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4158 | { |
37de36c6 KB |
4159 | /* Hopefully this is our own "fork-child" execing |
4160 | the real child. Hoax this event into a trap, and | |
4161 | GDB will see the child about to execute its start | |
4162 | address. */ | |
4163 | wstat = (SIGTRAP << 8) | 0177; | |
4164 | } | |
9185ddce JB |
4165 | #ifdef SYS_syssgi |
4166 | else if (what == SYS_syssgi) | |
4167 | { | |
4168 | /* see if we can break on dbx_link(). If yes, then | |
4169 | we no longer need the SYS_syssgi notifications. */ | |
4170 | if (insert_dbx_link_breakpoint (pi)) | |
4171 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4172 | FLAG_RESET, 0); | |
4173 | ||
4174 | /* This is an internal event and should be transparent | |
4175 | to wfi, so resume the execution and wait again. See | |
4176 | comment in procfs_init_inferior() for more details. */ | |
4177 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4178 | goto wait_again; | |
4179 | } | |
4180 | #endif | |
37de36c6 KB |
4181 | else if (syscall_is_lwp_create (pi, what)) |
4182 | { | |
4183 | /* | |
4184 | * This syscall is somewhat like fork/exec. | |
4185 | * We will get the event twice: once for the parent LWP, | |
4186 | * and once for the child. We should already know about | |
4187 | * the parent LWP, but the child will be new to us. So, | |
4188 | * whenever we get this event, if it represents a new | |
4189 | * thread, simply add the thread to the list. | |
4190 | */ | |
c3f6f71d | 4191 | |
37de36c6 | 4192 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4193 | temp_tid = proc_get_current_thread (pi); |
4194 | if (!find_procinfo (pi->pid, temp_tid)) | |
4195 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4196 | |
39f77062 | 4197 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4198 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4199 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4200 | add_thread (temp_ptid); |
4201 | ||
37de36c6 KB |
4202 | /* Return to WFI, but tell it to immediately resume. */ |
4203 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4204 | return inferior_ptid; |
37de36c6 KB |
4205 | } |
4206 | else if (syscall_is_lwp_exit (pi, what)) | |
4207 | { | |
17faa917 DJ |
4208 | if (print_thread_events) |
4209 | printf_unfiltered (_("[%s exited]\n"), | |
4210 | target_pid_to_str (retval)); | |
37de36c6 KB |
4211 | delete_thread (retval); |
4212 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4213 | return retval; | |
c3f6f71d | 4214 | } |
37de36c6 KB |
4215 | else if (0) |
4216 | { | |
4217 | /* FIXME: Do we need to handle SYS_sproc, | |
4218 | SYS_fork, or SYS_vfork here? The old procfs | |
4219 | seemed to use this event to handle threads on | |
4220 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4221 | that threads were actually separate processes. |
37de36c6 KB |
4222 | Irix, maybe? Anyway, low priority for now. */ |
4223 | } | |
4224 | else | |
4225 | { | |
a3f17187 | 4226 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4227 | proc_prettyprint_syscall (proc_what (pi), 0); |
4228 | printf_filtered ("\n"); | |
4229 | #ifndef PIOCSSPCACT | |
4230 | { | |
4231 | long i, nsysargs, *sysargs; | |
4232 | ||
4233 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4234 | (sysargs = proc_sysargs (pi)) != NULL) | |
4235 | { | |
a3f17187 | 4236 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 4237 | for (i = 0; i < nsysargs; i++) |
19958708 | 4238 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4239 | i, sysargs[i]); |
4240 | } | |
4241 | } | |
c3f6f71d | 4242 | #endif |
37de36c6 | 4243 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4244 | return inferior_ptid; |
37de36c6 | 4245 | } |
c3f6f71d JM |
4246 | break; |
4247 | case PR_REQUESTED: | |
4248 | #if 0 /* FIXME */ | |
4249 | wstat = (SIGSTOP << 8) | 0177; | |
4250 | break; | |
4251 | #else | |
4252 | if (retry < 5) | |
4253 | { | |
a3f17187 | 4254 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4255 | pi->status_valid = 0; |
4256 | goto wait_again; | |
4257 | } | |
4258 | else | |
4259 | { | |
4260 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4261 | temp_tid = proc_get_current_thread (pi); |
4262 | if (!find_procinfo (pi->pid, temp_tid)) | |
4263 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4264 | |
4265 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4266 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4267 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4268 | add_thread (temp_ptid); |
c3f6f71d JM |
4269 | |
4270 | status->kind = TARGET_WAITKIND_STOPPED; | |
4271 | status->value.sig = 0; | |
4272 | return retval; | |
4273 | } | |
4274 | #endif | |
4275 | case PR_JOBCONTROL: | |
4276 | wstat = (what << 8) | 0177; | |
4277 | break; | |
4278 | case PR_FAULTED: | |
7af6341f | 4279 | switch (what) { |
c3f6f71d JM |
4280 | #ifdef FLTWATCH |
4281 | case FLTWATCH: | |
4282 | wstat = (SIGTRAP << 8) | 0177; | |
4283 | break; | |
4284 | #endif | |
4285 | #ifdef FLTKWATCH | |
4286 | case FLTKWATCH: | |
4287 | wstat = (SIGTRAP << 8) | 0177; | |
4288 | break; | |
4289 | #endif | |
4290 | /* FIXME: use si_signo where possible. */ | |
4291 | case FLTPRIV: | |
4292 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4293 | case FLTILL: | |
4294 | #endif | |
4295 | wstat = (SIGILL << 8) | 0177; | |
4296 | break; | |
4297 | case FLTBPT: | |
4298 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4299 | case FLTTRACE: | |
4300 | #endif | |
9185ddce JB |
4301 | /* If we hit our __dbx_link() internal breakpoint, |
4302 | then remove it. See comments in procfs_init_inferior() | |
4303 | for more details. */ | |
4304 | if (dbx_link_bpt_addr != 0 | |
4305 | && dbx_link_bpt_addr == read_pc ()) | |
4306 | remove_dbx_link_breakpoint (); | |
4307 | ||
c3f6f71d JM |
4308 | wstat = (SIGTRAP << 8) | 0177; |
4309 | break; | |
4310 | case FLTSTACK: | |
4311 | case FLTACCESS: | |
4312 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4313 | case FLTBOUNDS: | |
4314 | #endif | |
4315 | wstat = (SIGSEGV << 8) | 0177; | |
4316 | break; | |
4317 | case FLTIOVF: | |
4318 | case FLTIZDIV: | |
4319 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4320 | case FLTFPE: | |
4321 | #endif | |
4322 | wstat = (SIGFPE << 8) | 0177; | |
4323 | break; | |
4324 | case FLTPAGE: /* Recoverable page fault */ | |
4325 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4326 | retval = pid_to_ptid (-1); |
c3f6f71d | 4327 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 4328 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4329 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4330 | error (_("... giving up...")); |
c3f6f71d JM |
4331 | break; |
4332 | } | |
4333 | break; /* case PR_FAULTED: */ | |
4334 | default: /* switch (why) unmatched */ | |
4335 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4336 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4337 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4338 | error (_("... giving up...")); |
c3f6f71d JM |
4339 | break; |
4340 | } | |
4341 | /* | |
4342 | * Got this far without error: | |
4343 | * If retval isn't in the threads database, add it. | |
4344 | */ | |
39f77062 KB |
4345 | if (PIDGET (retval) > 0 && |
4346 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4347 | !in_thread_list (retval)) |
c906108c | 4348 | { |
c3f6f71d | 4349 | /* |
19958708 | 4350 | * We have a new thread. |
c3f6f71d | 4351 | * We need to add it both to GDB's list and to our own. |
19958708 | 4352 | * If we don't create a procinfo, resume may be unhappy |
c3f6f71d JM |
4353 | * later. |
4354 | */ | |
c3f6f71d JM |
4355 | add_thread (retval); |
4356 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4357 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4358 | } |
c906108c | 4359 | } |
c3f6f71d | 4360 | else /* flags do not indicate STOPPED */ |
c906108c | 4361 | { |
c3f6f71d JM |
4362 | /* surely this can't happen... */ |
4363 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4364 | __LINE__); | |
4365 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4366 | error (_("procfs: ...giving up...")); |
c906108c | 4367 | } |
c906108c | 4368 | } |
c906108c | 4369 | |
c3f6f71d JM |
4370 | if (status) |
4371 | store_waitstatus (status, wstat); | |
c906108c SS |
4372 | } |
4373 | ||
c3f6f71d JM |
4374 | return retval; |
4375 | } | |
c906108c | 4376 | |
4e73f23d RM |
4377 | /* Perform a partial transfer to/from the specified object. For |
4378 | memory transfers, fall back to the old memory xfer functions. */ | |
4379 | ||
4380 | static LONGEST | |
4381 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4382 | const char *annex, gdb_byte *readbuf, |
4383 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4384 | { |
4385 | switch (object) | |
4386 | { | |
4387 | case TARGET_OBJECT_MEMORY: | |
4388 | if (readbuf) | |
0b62613e PA |
4389 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4390 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4391 | if (writebuf) |
0b62613e PA |
4392 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4393 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4394 | return -1; |
4395 | ||
4396 | #ifdef NEW_PROC_API | |
4397 | case TARGET_OBJECT_AUXV: | |
4398 | return procfs_xfer_auxv (ops, object, annex, readbuf, writebuf, | |
4399 | offset, len); | |
4400 | #endif | |
4401 | ||
4402 | default: | |
4403 | if (ops->beneath != NULL) | |
4404 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4405 | readbuf, writebuf, offset, len); | |
4406 | return -1; | |
4407 | } | |
4408 | } | |
4409 | ||
4410 | ||
d0849a9a KB |
4411 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4412 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4413 | otherwise transfer them from the target. TARGET is unused. | |
4414 | ||
4415 | The return value is 0 if an error occurred or no bytes were | |
4416 | transferred. Otherwise, it will be a positive value which | |
4417 | indicates the number of bytes transferred between gdb and the | |
4418 | target. (Note that the interface also makes provisions for | |
4419 | negative values, but this capability isn't implemented here.) */ | |
4420 | ||
c3f6f71d | 4421 | static int |
0b62613e | 4422 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4423 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4424 | { |
4425 | procinfo *pi; | |
4426 | int nbytes = 0; | |
c906108c | 4427 | |
c3f6f71d | 4428 | /* Find procinfo for main process */ |
39f77062 | 4429 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4430 | if (pi->as_fd == 0 && |
4431 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4432 | { |
c3f6f71d JM |
4433 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4434 | return 0; | |
c906108c | 4435 | } |
c906108c | 4436 | |
c3f6f71d | 4437 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4438 | { |
c3f6f71d | 4439 | if (dowrite) |
c906108c | 4440 | { |
c3f6f71d JM |
4441 | #ifdef NEW_PROC_API |
4442 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4443 | #else |
c3f6f71d | 4444 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4445 | #endif |
c3f6f71d | 4446 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4447 | } |
c3f6f71d | 4448 | else |
c906108c | 4449 | { |
c3f6f71d JM |
4450 | PROCFS_NOTE ("read memory: \n"); |
4451 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4452 | } |
c3f6f71d | 4453 | if (nbytes < 0) |
c906108c | 4454 | { |
c3f6f71d | 4455 | nbytes = 0; |
c906108c | 4456 | } |
c906108c | 4457 | } |
c3f6f71d | 4458 | return nbytes; |
c906108c SS |
4459 | } |
4460 | ||
4461 | /* | |
c3f6f71d JM |
4462 | * Function: invalidate_cache |
4463 | * | |
4464 | * Called by target_resume before making child runnable. | |
4465 | * Mark cached registers and status's invalid. | |
4466 | * If there are "dirty" caches that need to be written back | |
4467 | * to the child process, do that. | |
4468 | * | |
19958708 | 4469 | * File descriptors are also cached. |
c3f6f71d JM |
4470 | * As they are a limited resource, we cannot hold onto them indefinitely. |
4471 | * However, as they are expensive to open, we don't want to throw them | |
4472 | * away indescriminately either. As a compromise, we will keep the | |
4473 | * file descriptors for the parent process, but discard any file | |
4474 | * descriptors we may have accumulated for the threads. | |
4475 | * | |
4476 | * Return value: | |
19958708 | 4477 | * As this function is called by iterate_over_threads, it always |
c3f6f71d | 4478 | * returns zero (so that iterate_over_threads will keep iterating). |
c906108c SS |
4479 | */ |
4480 | ||
c3f6f71d JM |
4481 | |
4482 | static int | |
fba45db2 | 4483 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4484 | { |
c3f6f71d JM |
4485 | /* |
4486 | * About to run the child; invalidate caches and do any other cleanup. | |
4487 | */ | |
c906108c | 4488 | |
c3f6f71d JM |
4489 | #if 0 |
4490 | if (pi->gregs_dirty) | |
4491 | if (parent == NULL || | |
4492 | proc_get_current_thread (parent) != pi->tid) | |
4493 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4494 | proc_warn (pi, "target_resume, set_gregs", | |
4495 | __LINE__); | |
3e8c568d | 4496 | if (gdbarch_fp0_regnum (current_gdbarch) >= 0) |
60054393 MS |
4497 | if (pi->fpregs_dirty) |
4498 | if (parent == NULL || | |
4499 | proc_get_current_thread (parent) != pi->tid) | |
4500 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4501 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4502 | __LINE__); |
c906108c | 4503 | #endif |
c906108c | 4504 | |
c3f6f71d | 4505 | if (parent != NULL) |
c906108c | 4506 | { |
c3f6f71d | 4507 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4508 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4509 | We don't do this to the master (parent) procinfo. */ |
4510 | ||
4511 | close_procinfo_files (pi); | |
c906108c | 4512 | } |
c3f6f71d JM |
4513 | pi->gregs_valid = 0; |
4514 | pi->fpregs_valid = 0; | |
4515 | #if 0 | |
4516 | pi->gregs_dirty = 0; | |
4517 | pi->fpregs_dirty = 0; | |
c906108c | 4518 | #endif |
c3f6f71d JM |
4519 | pi->status_valid = 0; |
4520 | pi->threads_valid = 0; | |
c906108c | 4521 | |
c3f6f71d | 4522 | return 0; |
c906108c SS |
4523 | } |
4524 | ||
0fda6bd2 | 4525 | #if 0 |
c906108c | 4526 | /* |
c3f6f71d JM |
4527 | * Function: make_signal_thread_runnable |
4528 | * | |
4529 | * A callback function for iterate_over_threads. | |
4530 | * Find the asynchronous signal thread, and make it runnable. | |
4531 | * See if that helps matters any. | |
c906108c SS |
4532 | */ |
4533 | ||
c3f6f71d | 4534 | static int |
fba45db2 | 4535 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4536 | { |
c3f6f71d JM |
4537 | #ifdef PR_ASLWP |
4538 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4539 | { |
c3f6f71d JM |
4540 | if (!proc_run_process (pi, 0, -1)) |
4541 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4542 | return 1; | |
c906108c | 4543 | } |
c906108c | 4544 | #endif |
c3f6f71d | 4545 | return 0; |
c906108c | 4546 | } |
0fda6bd2 | 4547 | #endif |
c906108c SS |
4548 | |
4549 | /* | |
c3f6f71d JM |
4550 | * Function: target_resume |
4551 | * | |
4552 | * Make the child process runnable. Normally we will then call | |
4553 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4554 | * | |
4555 | * Arguments: | |
19958708 | 4556 | * step: if true, then arrange for the child to stop again |
c3f6f71d JM |
4557 | * after executing a single instruction. |
4558 | * signo: if zero, then cancel any pending signal. | |
19958708 | 4559 | * If non-zero, then arrange for the indicated signal |
c3f6f71d JM |
4560 | * to be delivered to the child when it runs. |
4561 | * pid: if -1, then allow any child thread to run. | |
4562 | * if non-zero, then allow only the indicated thread to run. | |
4563 | ******* (not implemented yet) | |
c906108c SS |
4564 | */ |
4565 | ||
4566 | static void | |
39f77062 | 4567 | procfs_resume (ptid_t ptid, int step, enum target_signal signo) |
c906108c | 4568 | { |
c3f6f71d JM |
4569 | procinfo *pi, *thread; |
4570 | int native_signo; | |
4571 | ||
19958708 | 4572 | /* 2.1: |
c3f6f71d | 4573 | prrun.prflags |= PRSVADDR; |
19958708 | 4574 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4575 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4576 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4577 | prrun.prflags |= PRCFAULT; clear current fault. |
4578 | ||
4579 | PRSTRACE and PRSFAULT can be done by other means | |
4580 | (proc_trace_signals, proc_trace_faults) | |
4581 | PRSVADDR is unnecessary. | |
4582 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4583 | This basically leaves PRSTEP and PRCSIG. | |
4584 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4585 | So basically PR_STEP is the sole argument that must be passed | |
4586 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4587 | ||
4588 | /* Find procinfo for main process */ | |
39f77062 | 4589 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4590 | |
4591 | /* First cut: ignore pid argument */ | |
4592 | errno = 0; | |
c906108c | 4593 | |
c3f6f71d JM |
4594 | /* Convert signal to host numbering. */ |
4595 | if (signo == 0 || | |
0fda6bd2 | 4596 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4597 | native_signo = 0; |
4598 | else | |
4599 | native_signo = target_signal_to_host (signo); | |
c906108c | 4600 | |
c3f6f71d | 4601 | pi->ignore_next_sigstop = 0; |
c906108c | 4602 | |
c3f6f71d JM |
4603 | /* Running the process voids all cached registers and status. */ |
4604 | /* Void the threads' caches first */ | |
19958708 | 4605 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4606 | /* Void the process procinfo's caches. */ |
4607 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4608 | |
39f77062 | 4609 | if (PIDGET (ptid) != -1) |
c906108c | 4610 | { |
c3f6f71d | 4611 | /* Resume a specific thread, presumably suppressing the others. */ |
39f77062 | 4612 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4613 | if (thread != NULL) |
c906108c | 4614 | { |
c3f6f71d JM |
4615 | if (thread->tid != 0) |
4616 | { | |
4617 | /* We're to resume a specific thread, and not the others. | |
4618 | * Set the child process's PR_ASYNC flag. | |
4619 | */ | |
4620 | #ifdef PR_ASYNC | |
4621 | if (!proc_set_async (pi)) | |
4622 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4623 | #endif | |
4624 | #if 0 | |
19958708 | 4625 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4626 | make_signal_thread_runnable, |
4627 | NULL); | |
4628 | #endif | |
4629 | pi = thread; /* substitute the thread's procinfo for run */ | |
4630 | } | |
c906108c SS |
4631 | } |
4632 | } | |
c906108c | 4633 | |
c3f6f71d | 4634 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4635 | { |
c3f6f71d | 4636 | if (errno == EBUSY) |
8a3fe4f8 | 4637 | warning (_("resume: target already running. Pretend to resume, and hope for the best!")); |
c3f6f71d JM |
4638 | else |
4639 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4640 | } |
c3f6f71d | 4641 | } |
c906108c | 4642 | |
c3f6f71d JM |
4643 | /* |
4644 | * Function: register_gdb_signals | |
4645 | * | |
19958708 | 4646 | * Traverse the list of signals that GDB knows about |
c3f6f71d JM |
4647 | * (see "handle" command), and arrange for the target |
4648 | * to be stopped or not, according to these settings. | |
4649 | * | |
4650 | * Returns non-zero for success, zero for failure. | |
4651 | */ | |
c906108c | 4652 | |
c3f6f71d | 4653 | static int |
37de36c6 | 4654 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4655 | { |
4656 | int signo; | |
c906108c | 4657 | |
c3f6f71d JM |
4658 | for (signo = 0; signo < NSIG; signo ++) |
4659 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4660 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4661 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4662 | prdelset (signals, signo); | |
4663 | else | |
4664 | praddset (signals, signo); | |
c906108c | 4665 | |
c3f6f71d | 4666 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4667 | } |
4668 | ||
4669 | /* | |
c3f6f71d JM |
4670 | * Function: target_notice_signals |
4671 | * | |
4672 | * Set up to trace signals in the child process. | |
4673 | */ | |
c906108c | 4674 | |
c3f6f71d | 4675 | static void |
39f77062 | 4676 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4677 | { |
37de36c6 | 4678 | gdb_sigset_t signals; |
39f77062 | 4679 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4680 | |
c3f6f71d JM |
4681 | if (proc_get_traced_signals (pi, &signals) && |
4682 | register_gdb_signals (pi, &signals)) | |
4683 | return; | |
4684 | else | |
4685 | proc_error (pi, "notice_signals", __LINE__); | |
4686 | } | |
c906108c | 4687 | |
c3f6f71d JM |
4688 | /* |
4689 | * Function: target_files_info | |
4690 | * | |
4691 | * Print status information about the child process. | |
4692 | */ | |
c906108c | 4693 | |
c3f6f71d | 4694 | static void |
fba45db2 | 4695 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4696 | { |
181e7f93 | 4697 | struct inferior *inf = current_inferior (); |
a3f17187 | 4698 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4699 | inf->attach_flag? "attached": "child", |
39f77062 | 4700 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4701 | } |
c906108c | 4702 | |
c3f6f71d JM |
4703 | /* |
4704 | * Function: target_open | |
4705 | * | |
4706 | * A dummy: you don't open procfs. | |
c906108c SS |
4707 | */ |
4708 | ||
4709 | static void | |
fba45db2 | 4710 | procfs_open (char *args, int from_tty) |
c906108c | 4711 | { |
8a3fe4f8 | 4712 | error (_("Use the \"run\" command to start a Unix child process.")); |
c3f6f71d | 4713 | } |
c906108c | 4714 | |
c3f6f71d JM |
4715 | /* |
4716 | * Function: target_can_run | |
4717 | * | |
19958708 | 4718 | * This tells GDB that this target vector can be invoked |
c3f6f71d JM |
4719 | * for "run" or "attach". |
4720 | */ | |
c906108c | 4721 | |
c3f6f71d JM |
4722 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4723 | be a runnable target. Used by targets | |
4724 | that can sit atop procfs, such as solaris | |
4725 | thread support. */ | |
c906108c | 4726 | |
c906108c | 4727 | |
c3f6f71d | 4728 | static int |
fba45db2 | 4729 | procfs_can_run (void) |
c3f6f71d JM |
4730 | { |
4731 | /* This variable is controlled by modules that sit atop procfs that | |
4732 | may layer their own process structure atop that provided here. | |
4733 | sol-thread.c does this because of the Solaris two-level thread | |
4734 | model. */ | |
19958708 | 4735 | |
c3f6f71d | 4736 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ |
c906108c | 4737 | |
c3f6f71d JM |
4738 | return !procfs_suppress_run; |
4739 | } | |
c906108c | 4740 | |
c3f6f71d JM |
4741 | /* |
4742 | * Function: target_stop | |
4743 | * | |
4744 | * Stop the child process asynchronously, as when the | |
4745 | * gdb user types control-c or presses a "stop" button. | |
4746 | * | |
4747 | * Works by sending kill(SIGINT) to the child's process group. | |
4748 | */ | |
c906108c | 4749 | |
c3f6f71d | 4750 | static void |
f9c72d52 | 4751 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4752 | { |
c3f6f71d | 4753 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4754 | } |
4755 | ||
c906108c | 4756 | /* |
c3f6f71d JM |
4757 | * Function: unconditionally_kill_inferior |
4758 | * | |
4759 | * Make it die. Wait for it to die. Clean up after it. | |
19958708 | 4760 | * Note: this should only be applied to the real process, |
c3f6f71d JM |
4761 | * not to an LWP, because of the check for parent-process. |
4762 | * If we need this to work for an LWP, it needs some more logic. | |
4763 | */ | |
c906108c | 4764 | |
c3f6f71d | 4765 | static void |
fba45db2 | 4766 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4767 | { |
4768 | int parent_pid; | |
c906108c | 4769 | |
c3f6f71d JM |
4770 | parent_pid = proc_parent_pid (pi); |
4771 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4772 | /* FIXME: use access functions */ | |
4773 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4774 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4775 | file for the inferior. */ | |
4776 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4777 | { | |
4778 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4779 | } | |
4780 | #endif | |
4781 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4782 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4783 | to kill the inferior, otherwise it might remain stopped with a | |
4784 | pending SIGKILL. | |
4785 | We do not check the result of the PIOCSSIG, the inferior might have | |
4786 | died already. */ | |
4787 | { | |
37de36c6 | 4788 | gdb_siginfo_t newsiginfo; |
c906108c | 4789 | |
c3f6f71d JM |
4790 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4791 | newsiginfo.si_signo = SIGKILL; | |
4792 | newsiginfo.si_code = 0; | |
4793 | newsiginfo.si_errno = 0; | |
4794 | newsiginfo.si_pid = getpid (); | |
4795 | newsiginfo.si_uid = getuid (); | |
4796 | /* FIXME: use proc_set_current_signal */ | |
4797 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4798 | } | |
4799 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4800 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4801 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4802 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4803 | destroy_procinfo (pi); | |
c906108c | 4804 | |
c3f6f71d JM |
4805 | /* If pi is GDB's child, wait for it to die. */ |
4806 | if (parent_pid == getpid ()) | |
19958708 | 4807 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4808 | Should we check the returned event? */ |
4809 | { | |
0d06e24b | 4810 | #if 0 |
c3f6f71d | 4811 | int status, ret; |
c906108c | 4812 | |
c3f6f71d JM |
4813 | ret = waitpid (pi->pid, &status, 0); |
4814 | #else | |
4815 | wait (NULL); | |
4816 | #endif | |
4817 | } | |
4818 | } | |
c906108c | 4819 | |
c3f6f71d JM |
4820 | /* |
4821 | * Function: target_kill_inferior | |
4822 | * | |
4823 | * We're done debugging it, and we want it to go away. | |
4824 | * Then we want GDB to forget all about it. | |
c906108c SS |
4825 | */ |
4826 | ||
19958708 | 4827 | static void |
fba45db2 | 4828 | procfs_kill_inferior (void) |
c906108c | 4829 | { |
39f77062 | 4830 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4831 | { |
4832 | /* Find procinfo for main process */ | |
39f77062 | 4833 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4834 | |
c3f6f71d JM |
4835 | if (pi) |
4836 | unconditionally_kill_inferior (pi); | |
4837 | target_mourn_inferior (); | |
c906108c | 4838 | } |
c3f6f71d JM |
4839 | } |
4840 | ||
4841 | /* | |
4842 | * Function: target_mourn_inferior | |
4843 | * | |
4844 | * Forget we ever debugged this thing! | |
4845 | */ | |
c906108c | 4846 | |
19958708 | 4847 | static void |
136d6dae | 4848 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4849 | { |
4850 | procinfo *pi; | |
c906108c | 4851 | |
39f77062 | 4852 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4853 | { |
4854 | /* Find procinfo for main process */ | |
39f77062 | 4855 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4856 | if (pi) |
4857 | destroy_procinfo (pi); | |
c906108c | 4858 | } |
c3f6f71d | 4859 | unpush_target (&procfs_ops); |
8181d85f DJ |
4860 | |
4861 | if (dbx_link_bpt != NULL) | |
4862 | { | |
4863 | deprecated_remove_raw_breakpoint (dbx_link_bpt); | |
4864 | dbx_link_bpt_addr = 0; | |
4865 | dbx_link_bpt = NULL; | |
4866 | } | |
4867 | ||
c3f6f71d JM |
4868 | generic_mourn_inferior (); |
4869 | } | |
c906108c | 4870 | |
c3f6f71d JM |
4871 | /* |
4872 | * Function: init_inferior | |
4873 | * | |
19958708 | 4874 | * When GDB forks to create a runnable inferior process, |
c3f6f71d JM |
4875 | * this function is called on the parent side of the fork. |
4876 | * It's job is to do whatever is necessary to make the child | |
4877 | * ready to be debugged, and then wait for the child to synchronize. | |
4878 | */ | |
c906108c | 4879 | |
19958708 | 4880 | static void |
fba45db2 | 4881 | procfs_init_inferior (int pid) |
c3f6f71d JM |
4882 | { |
4883 | procinfo *pi; | |
37de36c6 | 4884 | gdb_sigset_t signals; |
c3f6f71d | 4885 | int fail; |
2689673f | 4886 | int lwpid; |
c906108c | 4887 | |
c3f6f71d JM |
4888 | /* This routine called on the parent side (GDB side) |
4889 | after GDB forks the inferior. */ | |
c906108c | 4890 | |
c3f6f71d | 4891 | push_target (&procfs_ops); |
c906108c | 4892 | |
c3f6f71d JM |
4893 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4894 | perror ("procfs: out of memory in 'init_inferior'"); | |
4895 | ||
4896 | if (!open_procinfo_files (pi, FD_CTL)) | |
4897 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4898 | ||
4899 | /* | |
4900 | xmalloc // done | |
4901 | open_procinfo_files // done | |
4902 | link list // done | |
4903 | prfillset (trace) | |
4904 | procfs_notice_signals | |
4905 | prfillset (fault) | |
4906 | prdelset (FLTPAGE) | |
4907 | PIOCWSTOP | |
4908 | PIOCSFAULT | |
4909 | */ | |
4910 | ||
4911 | /* If not stopped yet, wait for it to stop. */ | |
4912 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4913 | !(proc_wait_for_stop (pi))) | |
4914 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4915 | ||
4916 | /* Save some of the /proc state to be restored if we detach. */ | |
4917 | /* FIXME: Why? In case another debugger was debugging it? | |
4918 | We're it's parent, for Ghu's sake! */ | |
4919 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4920 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4921 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4922 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4923 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4924 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4925 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4926 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4927 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4928 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4929 | ||
4930 | /* Register to trace selected signals in the child. */ | |
4931 | prfillset (&signals); | |
4932 | if (!register_gdb_signals (pi, &signals)) | |
4933 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4934 | ||
4935 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4936 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4937 | ||
0d06e24b JM |
4938 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4939 | and possibly even turning ON kill-on-last-close at this point. But | |
4940 | I can't make that change without careful testing which I don't have | |
4941 | time to do right now... */ | |
c3f6f71d JM |
4942 | /* Turn on run-on-last-close flag so that the child |
4943 | will die if GDB goes away for some reason. */ | |
4944 | if (!proc_set_run_on_last_close (pi)) | |
4945 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4946 | ||
2689673f PA |
4947 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4948 | lwpid = proc_get_current_thread (pi); | |
4949 | ||
4950 | /* Create a procinfo for the main lwp. */ | |
4951 | create_procinfo (pid, lwpid); | |
4952 | ||
4953 | /* We already have a main thread registered in the thread table at | |
4954 | this point, but it didn't have any lwp info yet. Notify the core | |
4955 | about it. This changes inferior_ptid as well. */ | |
4956 | thread_change_ptid (pid_to_ptid (pid), | |
4957 | MERGEPID (pid, lwpid)); | |
c906108c | 4958 | |
46ac7a5d AC |
4959 | /* Typically two, one trap to exec the shell, one to exec the |
4960 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4961 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4962 | |
4963 | #ifdef SYS_syssgi | |
4964 | /* On mips-irix, we need to stop the inferior early enough during | |
4965 | the startup phase in order to be able to load the shared library | |
4966 | symbols and insert the breakpoints that are located in these shared | |
4967 | libraries. Stopping at the program entry point is not good enough | |
4968 | because the -init code is executed before the execution reaches | |
4969 | that point. | |
4970 | ||
4971 | So what we need to do is to insert a breakpoint in the runtime | |
4972 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4973 | called by rld once all shared libraries have been mapped, but before | |
4974 | the -init code is executed. Unfortuantely, this is not straightforward, | |
4975 | as rld is not part of the executable we are running, and thus we need | |
4976 | the inferior to run until rld itself has been mapped in memory. | |
4977 | ||
4978 | For this, we trace all syssgi() syscall exit events. Each time | |
4979 | we detect such an event, we iterate over each text memory maps, | |
4980 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4981 | When found, we know that rld has been mapped, and that we can insert | |
4982 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4983 | has been inserted, the syssgi() notifications are no longer necessary, | |
4984 | so they should be canceled. */ | |
4985 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4986 | #endif |
c3f6f71d | 4987 | } |
c906108c | 4988 | |
c3f6f71d JM |
4989 | /* |
4990 | * Function: set_exec_trap | |
4991 | * | |
4992 | * When GDB forks to create a new process, this function is called | |
4993 | * on the child side of the fork before GDB exec's the user program. | |
4994 | * Its job is to make the child minimally debuggable, so that the | |
4995 | * parent GDB process can connect to the child and take over. | |
4996 | * This function should do only the minimum to make that possible, | |
4997 | * and to synchronize with the parent process. The parent process | |
4998 | * should take care of the details. | |
4999 | */ | |
5000 | ||
5001 | static void | |
fba45db2 | 5002 | procfs_set_exec_trap (void) |
c3f6f71d JM |
5003 | { |
5004 | /* This routine called on the child side (inferior side) | |
5005 | after GDB forks the inferior. It must use only local variables, | |
5006 | because it may be sharing data space with its parent. */ | |
c906108c | 5007 | |
c3f6f71d | 5008 | procinfo *pi; |
37de36c6 | 5009 | sysset_t *exitset; |
c906108c | 5010 | |
c3f6f71d | 5011 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 5012 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 5013 | |
c3f6f71d JM |
5014 | if (open_procinfo_files (pi, FD_CTL) == 0) |
5015 | { | |
5016 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
5017 | gdb_flush (gdb_stderr); | |
5018 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
5019 | _exit (127); | |
5020 | } | |
c906108c | 5021 | |
c3f6f71d JM |
5022 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
5023 | /* OSF method for tracing exec syscalls. Quoting: | |
5024 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
5025 | exits from exec system calls because of the user level loader. */ | |
5026 | /* FIXME: make nice and maybe move into an access function. */ | |
5027 | { | |
5028 | int prfs_flags; | |
c906108c | 5029 | |
c3f6f71d JM |
5030 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
5031 | { | |
5032 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
5033 | gdb_flush (gdb_stderr); | |
5034 | _exit (127); | |
5035 | } | |
5036 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 5037 | |
c3f6f71d JM |
5038 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
5039 | { | |
5040 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
5041 | gdb_flush (gdb_stderr); | |
5042 | _exit (127); | |
5043 | } | |
5044 | } | |
5045 | #else /* not PRFS_STOPEXEC */ | |
5046 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
5047 | /* GW: Rationale... | |
5048 | Not all systems with /proc have all the exec* syscalls with the same | |
5049 | names. On the SGI, for example, there is no SYS_exec, but there | |
5050 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 5051 | |
37de36c6 KB |
5052 | exitset = sysset_t_alloc (pi); |
5053 | gdb_premptysysset (exitset); | |
c3f6f71d | 5054 | #ifdef SYS_exec |
37de36c6 | 5055 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
5056 | #endif |
5057 | #ifdef SYS_execve | |
37de36c6 | 5058 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
5059 | #endif |
5060 | #ifdef SYS_execv | |
37de36c6 | 5061 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 5062 | #endif |
37de36c6 KB |
5063 | #ifdef DYNAMIC_SYSCALLS |
5064 | { | |
5065 | int callnum = find_syscall (pi, "execve"); | |
5066 | ||
5067 | if (callnum >= 0) | |
5068 | gdb_praddsysset (exitset, callnum); | |
c906108c | 5069 | |
37de36c6 KB |
5070 | callnum = find_syscall (pi, "ra_execve"); |
5071 | if (callnum >= 0) | |
5072 | gdb_praddsysset (exitset, callnum); | |
5073 | } | |
5074 | #endif /* DYNAMIC_SYSCALLS */ | |
5075 | ||
5076 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 5077 | { |
c3f6f71d JM |
5078 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
5079 | gdb_flush (gdb_stderr); | |
5080 | _exit (127); | |
c906108c | 5081 | } |
c3f6f71d JM |
5082 | #endif /* PRFS_STOPEXEC */ |
5083 | ||
5084 | /* FIXME: should this be done in the parent instead? */ | |
5085 | /* Turn off inherit on fork flag so that all grand-children | |
5086 | of gdb start with tracing flags cleared. */ | |
5087 | if (!proc_unset_inherit_on_fork (pi)) | |
5088 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
5089 | ||
5090 | /* Turn off run on last close flag, so that the child process | |
5091 | cannot run away just because we close our handle on it. | |
5092 | We want it to wait for the parent to attach. */ | |
5093 | if (!proc_unset_run_on_last_close (pi)) | |
5094 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
5095 | ||
19958708 | 5096 | /* FIXME: No need to destroy the procinfo -- |
c3f6f71d JM |
5097 | we have our own address space, and we're about to do an exec! */ |
5098 | /*destroy_procinfo (pi);*/ | |
c906108c | 5099 | } |
c906108c | 5100 | |
c3f6f71d JM |
5101 | /* |
5102 | * Function: create_inferior | |
5103 | * | |
5104 | * This function is called BEFORE gdb forks the inferior process. | |
19958708 | 5105 | * Its only real responsibility is to set things up for the fork, |
c3f6f71d JM |
5106 | * and tell GDB which two functions to call after the fork (one |
5107 | * for the parent, and one for the child). | |
19958708 | 5108 | * |
c3f6f71d JM |
5109 | * This function does a complicated search for a unix shell program, |
5110 | * which it then uses to parse arguments and environment variables | |
5111 | * to be sent to the child. I wonder whether this code could not | |
5112 | * be abstracted out and shared with other unix targets such as | |
5113 | * infptrace? | |
5114 | */ | |
c906108c SS |
5115 | |
5116 | static void | |
136d6dae VP |
5117 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
5118 | char *allargs, char **env, int from_tty) | |
c906108c SS |
5119 | { |
5120 | char *shell_file = getenv ("SHELL"); | |
5121 | char *tryname; | |
5122 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
5123 | { | |
5124 | ||
5125 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
5126 | just do this the normal way (via execlp, which operates by |
5127 | attempting an exec for each element of the PATH until it | |
5128 | finds one which succeeds), then there will be an exec for | |
5129 | each failed attempt, each of which will cause a PR_SYSEXIT | |
5130 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
5131 | for these failed execs with the ones for successful execs | |
5132 | (whether the exec has succeeded is stored at that time in the | |
5133 | carry bit or some such architecture-specific and | |
5134 | non-ABI-specified place). | |
5135 | ||
5136 | So I can't think of anything better than to search the PATH | |
5137 | now. This has several disadvantages: (1) There is a race | |
5138 | condition; if we find a file now and it is deleted before we | |
5139 | exec it, we lose, even if the deletion leaves a valid file | |
5140 | further down in the PATH, (2) there is no way to know exactly | |
5141 | what an executable (in the sense of "capable of being | |
5142 | exec'd") file is. Using access() loses because it may lose | |
5143 | if the caller is the superuser; failing to use it loses if | |
5144 | there are ACLs or some such. */ | |
c906108c SS |
5145 | |
5146 | char *p; | |
5147 | char *p1; | |
5148 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 5149 | path is used from within GDB. */ |
c906108c SS |
5150 | char *path = getenv ("PATH"); |
5151 | int len; | |
5152 | struct stat statbuf; | |
5153 | ||
5154 | if (path == NULL) | |
5155 | path = "/bin:/usr/bin"; | |
5156 | ||
5157 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 5158 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
5159 | { |
5160 | p1 = strchr (p, ':'); | |
5161 | if (p1 != NULL) | |
5162 | len = p1 - p; | |
5163 | else | |
5164 | len = strlen (p); | |
5165 | strncpy (tryname, p, len); | |
5166 | tryname[len] = '\0'; | |
5167 | strcat (tryname, "/"); | |
5168 | strcat (tryname, shell_file); | |
5169 | if (access (tryname, X_OK) < 0) | |
5170 | continue; | |
5171 | if (stat (tryname, &statbuf) < 0) | |
5172 | continue; | |
5173 | if (!S_ISREG (statbuf.st_mode)) | |
5174 | /* We certainly need to reject directories. I'm not quite | |
5175 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
5176 | that people want to exec() these things. */ | |
5177 | continue; | |
5178 | break; | |
5179 | } | |
5180 | if (p == NULL) | |
5181 | /* Not found. This must be an error rather than merely passing | |
5182 | the file to execlp(), because execlp() would try all the | |
5183 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 5184 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 5185 | __LINE__, shell_file); |
c906108c SS |
5186 | |
5187 | shell_file = tryname; | |
5188 | } | |
5189 | ||
19958708 | 5190 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
c3f6f71d | 5191 | procfs_init_inferior, NULL, shell_file); |
c906108c | 5192 | |
9185ddce JB |
5193 | #ifdef SYS_syssgi |
5194 | /* Make sure to cancel the syssgi() syscall-exit notifications. | |
5195 | They should normally have been removed by now, but they may still | |
5196 | be activated if the inferior doesn't use shared libraries, or if | |
5197 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
5198 | See procfs_init_inferior() for more details. */ | |
5199 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), | |
5200 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
5201 | #endif | |
c906108c SS |
5202 | } |
5203 | ||
c3f6f71d JM |
5204 | /* |
5205 | * Function: notice_thread | |
5206 | * | |
5207 | * Callback for find_new_threads. | |
5208 | * Calls "add_thread". | |
5209 | */ | |
c906108c | 5210 | |
c3f6f71d | 5211 | static int |
fba45db2 | 5212 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5213 | { |
39f77062 | 5214 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5215 | |
2689673f | 5216 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 5217 | add_thread (gdb_threadid); |
c906108c | 5218 | |
c3f6f71d JM |
5219 | return 0; |
5220 | } | |
5221 | ||
5222 | /* | |
5223 | * Function: target_find_new_threads | |
5224 | * | |
19958708 | 5225 | * Query all the threads that the target knows about, |
c3f6f71d JM |
5226 | * and give them back to GDB to add to its list. |
5227 | */ | |
5228 | ||
5229 | void | |
fba45db2 | 5230 | procfs_find_new_threads (void) |
c3f6f71d JM |
5231 | { |
5232 | procinfo *pi; | |
5233 | ||
5234 | /* Find procinfo for main process */ | |
39f77062 | 5235 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5236 | proc_update_threads (pi); |
5237 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5238 | } |
5239 | ||
19958708 | 5240 | /* |
c3f6f71d JM |
5241 | * Function: target_thread_alive |
5242 | * | |
5243 | * Return true if the thread is still 'alive'. | |
5244 | * | |
5245 | * This guy doesn't really seem to be doing his job. | |
5246 | * Got to investigate how to tell when a thread is really gone. | |
5247 | */ | |
c906108c | 5248 | |
c906108c | 5249 | static int |
39f77062 | 5250 | procfs_thread_alive (ptid_t ptid) |
c906108c | 5251 | { |
c3f6f71d JM |
5252 | int proc, thread; |
5253 | procinfo *pi; | |
c906108c | 5254 | |
39f77062 KB |
5255 | proc = PIDGET (ptid); |
5256 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5257 | /* If I don't know it, it ain't alive! */ |
5258 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5259 | return 0; | |
5260 | ||
5261 | /* If I can't get its status, it ain't alive! | |
5262 | What's more, I need to forget about it! */ | |
5263 | if (!proc_get_status (pi)) | |
5264 | { | |
5265 | destroy_procinfo (pi); | |
5266 | return 0; | |
5267 | } | |
5268 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5269 | return 1; | |
c906108c | 5270 | } |
c3f6f71d | 5271 | |
5240ceac | 5272 | /* Convert PTID to a string. Returns the string in a static buffer. */ |
c3f6f71d JM |
5273 | |
5274 | char * | |
117de6a9 | 5275 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5276 | { |
5277 | static char buf[80]; | |
c3f6f71d | 5278 | |
5240ceac MK |
5279 | if (TIDGET (ptid) == 0) |
5280 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5281 | else |
21749010 | 5282 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5283 | |
5284 | return buf; | |
c3f6f71d JM |
5285 | } |
5286 | ||
5287 | /* | |
5288 | * Function: procfs_set_watchpoint | |
5289 | * Insert a watchpoint | |
5290 | */ | |
5291 | ||
19958708 | 5292 | int |
39f77062 KB |
5293 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
5294 | int after) | |
c906108c | 5295 | { |
c3f6f71d | 5296 | #ifndef UNIXWARE |
37de36c6 | 5297 | #ifndef AIX5 |
c3f6f71d | 5298 | int pflags = 0; |
19958708 | 5299 | procinfo *pi; |
c3f6f71d | 5300 | |
19958708 | 5301 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5302 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d JM |
5303 | |
5304 | /* Translate from GDB's flags to /proc's */ | |
5305 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5306 | { |
c3f6f71d JM |
5307 | switch (rwflag) { /* FIXME: need an enum! */ |
5308 | case hw_write: /* default watchpoint (write) */ | |
5309 | pflags = WRITE_WATCHFLAG; | |
5310 | break; | |
5311 | case hw_read: /* read watchpoint */ | |
5312 | pflags = READ_WATCHFLAG; | |
5313 | break; | |
5314 | case hw_access: /* access watchpoint */ | |
5315 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5316 | break; | |
5317 | case hw_execute: /* execution HW breakpoint */ | |
5318 | pflags = EXEC_WATCHFLAG; | |
5319 | break; | |
5320 | default: /* Something weird. Return error. */ | |
c906108c | 5321 | return -1; |
c3f6f71d JM |
5322 | } |
5323 | if (after) /* Stop after r/w access is completed. */ | |
5324 | pflags |= AFTER_WATCHFLAG; | |
5325 | } | |
5326 | ||
5327 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5328 | { | |
5329 | if (errno == E2BIG) /* Typical error for no resources */ | |
5330 | return -1; /* fail */ | |
5331 | /* GDB may try to remove the same watchpoint twice. | |
5332 | If a remove request returns no match, don't error. */ | |
c906108c | 5333 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5334 | return 0; /* ignore */ |
5335 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5336 | } |
37de36c6 KB |
5337 | #endif /* AIX5 */ |
5338 | #endif /* UNIXWARE */ | |
c906108c SS |
5339 | return 0; |
5340 | } | |
5341 | ||
1e03ad20 KB |
5342 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5343 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5344 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5345 | far. | |
19958708 | 5346 | |
1e03ad20 KB |
5347 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5348 | procfs.c targets due to the fact that some of them still define | |
5349 | TARGET_CAN_USE_HARDWARE_WATCHPOINT. */ | |
5350 | ||
5351 | static int | |
5352 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5353 | { | |
5354 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS | |
5355 | return 0; | |
5356 | #else | |
5357 | /* Due to the way that proc_set_watchpoint() is implemented, host | |
5358 | and target pointers must be of the same size. If they are not, | |
5359 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5360 | fact that proc_set_watchpoint() calls |
5361 | procfs_address_to_host_pointer(); a close inspection of | |
5362 | procfs_address_to_host_pointer will reveal that an internal error | |
5363 | will be generated when the host and target pointer sizes are | |
5364 | different. */ | |
4e906f53 UW |
5365 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
5366 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) | |
1e03ad20 KB |
5367 | return 0; |
5368 | ||
5369 | /* Other tests here??? */ | |
5370 | ||
5371 | return 1; | |
5372 | #endif | |
5373 | } | |
5374 | ||
c3f6f71d JM |
5375 | /* |
5376 | * Function: stopped_by_watchpoint | |
5377 | * | |
5378 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5379 | * else returns zero. | |
5380 | */ | |
5381 | ||
c906108c | 5382 | int |
39f77062 | 5383 | procfs_stopped_by_watchpoint (ptid_t ptid) |
c906108c | 5384 | { |
c3f6f71d | 5385 | procinfo *pi; |
c906108c | 5386 | |
19958708 | 5387 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5388 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
aaeb7efa MS |
5389 | |
5390 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5391 | return 0; | |
5392 | ||
c3f6f71d | 5393 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5394 | { |
c3f6f71d | 5395 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5396 | { |
c906108c | 5397 | #ifdef FLTWATCH |
c3f6f71d JM |
5398 | if (proc_what (pi) == FLTWATCH) |
5399 | return 1; | |
c906108c SS |
5400 | #endif |
5401 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5402 | if (proc_what (pi) == FLTKWATCH) |
5403 | return 1; | |
c906108c | 5404 | #endif |
c3f6f71d | 5405 | } |
c906108c SS |
5406 | } |
5407 | return 0; | |
5408 | } | |
c906108c | 5409 | |
831e682e MS |
5410 | /* |
5411 | * Memory Mappings Functions: | |
5412 | */ | |
5413 | ||
19958708 | 5414 | /* |
831e682e MS |
5415 | * Function: iterate_over_mappings |
5416 | * | |
5417 | * Call a callback function once for each mapping, passing it the mapping, | |
5418 | * an optional secondary callback function, and some optional opaque data. | |
5419 | * Quit and return the first non-zero value returned from the callback. | |
5420 | * | |
5421 | * Arguments: | |
5422 | * pi -- procinfo struct for the process to be mapped. | |
5423 | * func -- callback function to be called by this iterator. | |
5424 | * data -- optional opaque data to be passed to the callback function. | |
5425 | * child_func -- optional secondary function pointer to be passed | |
5426 | * to the child function. | |
5427 | * | |
19958708 | 5428 | * Return: First non-zero return value from the callback function, |
831e682e MS |
5429 | * or zero. |
5430 | */ | |
5431 | ||
5432 | static int | |
19958708 RM |
5433 | iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data, |
5434 | int (*func) (struct prmap *map, | |
5435 | int (*child_func) (), | |
831e682e MS |
5436 | void *data)) |
5437 | { | |
5438 | char pathname[MAX_PROC_NAME_SIZE]; | |
5439 | struct prmap *prmaps; | |
5440 | struct prmap *prmap; | |
5441 | int funcstat; | |
5442 | int map_fd; | |
5443 | int nmap; | |
5444 | #ifdef NEW_PROC_API | |
5445 | struct stat sbuf; | |
5446 | #endif | |
5447 | ||
19958708 | 5448 | /* Get the number of mappings, allocate space, |
831e682e MS |
5449 | and read the mappings into prmaps. */ |
5450 | #ifdef NEW_PROC_API | |
5451 | /* Open map fd. */ | |
5452 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5453 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5454 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5455 | ||
5456 | /* Make sure it gets closed again. */ | |
5457 | make_cleanup_close (map_fd); | |
5458 | ||
19958708 | 5459 | /* Use stat to determine the file size, and compute |
831e682e MS |
5460 | the number of prmap_t objects it contains. */ |
5461 | if (fstat (map_fd, &sbuf) != 0) | |
5462 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5463 | ||
5464 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5465 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5466 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5467 | != (nmap * sizeof (*prmaps))) | |
5468 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5469 | #else | |
5470 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5471 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5472 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5473 | ||
5474 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5475 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5476 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5477 | #endif | |
5478 | ||
5479 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5480 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5481 | return funcstat; | |
5482 | ||
5483 | return 0; | |
5484 | } | |
5485 | ||
5486 | /* | |
5487 | * Function: solib_mappings_callback | |
5488 | * | |
19958708 RM |
5489 | * Calls the supplied callback function once for each mapped address |
5490 | * space in the process. The callback function receives an open | |
5491 | * file descriptor for the file corresponding to that mapped | |
5492 | * address space (if there is one), and the base address of the | |
831e682e MS |
5493 | * mapped space. Quit when the callback function returns a |
5494 | * nonzero value, or at teh end of the mappings. | |
5495 | * | |
5496 | * Returns: the first non-zero return value of the callback function, | |
5497 | * or zero. | |
5498 | */ | |
5499 | ||
19958708 | 5500 | int solib_mappings_callback (struct prmap *map, |
831e682e MS |
5501 | int (*func) (int, CORE_ADDR), |
5502 | void *data) | |
5503 | { | |
5504 | procinfo *pi = data; | |
5505 | int fd; | |
5506 | ||
5507 | #ifdef NEW_PROC_API | |
5508 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
5509 | ||
5510 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
5511 | return -1; /* sanity */ | |
5512 | ||
5513 | if (map->pr_mapname[0] == 0) | |
5514 | { | |
5515 | fd = -1; /* no map file */ | |
5516 | } | |
5517 | else | |
5518 | { | |
5519 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
5520 | /* Note: caller's responsibility to close this fd! */ | |
5521 | fd = open_with_retry (name, O_RDONLY); | |
5522 | /* Note: we don't test the above call for failure; | |
19958708 | 5523 | we just pass the FD on as given. Sometimes there is |
831e682e MS |
5524 | no file, so the open may return failure, but that's |
5525 | not a problem. */ | |
5526 | } | |
5527 | #else | |
5528 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
5529 | /* Note: we don't test the above call for failure; | |
19958708 | 5530 | we just pass the FD on as given. Sometimes there is |
831e682e MS |
5531 | no file, so the ioctl may return failure, but that's |
5532 | not a problem. */ | |
5533 | #endif | |
5534 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
5535 | } | |
5536 | ||
5537 | /* | |
5538 | * Function: proc_iterate_over_mappings | |
5539 | * | |
5540 | * Uses the unified "iterate_over_mappings" function | |
5541 | * to implement the exported interface to solib-svr4.c. | |
5542 | * | |
5543 | * Given a pointer to a function, call that function once for every | |
19958708 | 5544 | * mapped address space in the process. The callback function |
831e682e MS |
5545 | * receives an open file descriptor for the file corresponding to |
5546 | * that mapped address space (if there is one), and the base address | |
5547 | * of the mapped space. Quit when the callback function returns a | |
5548 | * nonzero value, or at teh end of the mappings. | |
5549 | * | |
5550 | * Returns: the first non-zero return value of the callback function, | |
5551 | * or zero. | |
5552 | */ | |
5553 | ||
5554 | int | |
5555 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) | |
5556 | { | |
5557 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5558 | ||
5559 | return iterate_over_mappings (pi, func, pi, solib_mappings_callback); | |
5560 | } | |
5561 | ||
be4d1333 MS |
5562 | /* |
5563 | * Function: find_memory_regions_callback | |
5564 | * | |
5565 | * Implements the to_find_memory_regions method. | |
5566 | * Calls an external function for each memory region. | |
5567 | * External function will have the signiture: | |
5568 | * | |
19958708 RM |
5569 | * int callback (CORE_ADDR vaddr, |
5570 | * unsigned long size, | |
5571 | * int read, int write, int execute, | |
be4d1333 MS |
5572 | * void *data); |
5573 | * | |
5574 | * Returns the integer value returned by the callback. | |
5575 | */ | |
5576 | ||
5577 | static int | |
19958708 RM |
5578 | find_memory_regions_callback (struct prmap *map, |
5579 | int (*func) (CORE_ADDR, | |
5580 | unsigned long, | |
5581 | int, int, int, | |
be4d1333 MS |
5582 | void *), |
5583 | void *data) | |
5584 | { | |
6dbdc4a3 | 5585 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5586 | map->pr_size, |
be4d1333 MS |
5587 | (map->pr_mflags & MA_READ) != 0, |
5588 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5589 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5590 | data); |
5591 | } | |
5592 | ||
5593 | /* | |
5594 | * Function: proc_find_memory_regions | |
5595 | * | |
5596 | * External interface. Calls a callback function once for each | |
5597 | * mapped memory region in the child process, passing as arguments | |
5598 | * CORE_ADDR virtual_address, | |
19958708 | 5599 | * unsigned long size, |
be4d1333 MS |
5600 | * int read, TRUE if region is readable by the child |
5601 | * int write, TRUE if region is writable by the child | |
5602 | * int execute TRUE if region is executable by the child. | |
19958708 | 5603 | * |
be4d1333 MS |
5604 | * Stops iterating and returns the first non-zero value |
5605 | * returned by the callback. | |
5606 | */ | |
5607 | ||
5608 | static int | |
19958708 RM |
5609 | proc_find_memory_regions (int (*func) (CORE_ADDR, |
5610 | unsigned long, | |
5611 | int, int, int, | |
5612 | void *), | |
be4d1333 MS |
5613 | void *data) |
5614 | { | |
5615 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5616 | ||
19958708 | 5617 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5618 | find_memory_regions_callback); |
5619 | } | |
5620 | ||
9185ddce JB |
5621 | /* Remove the breakpoint that we inserted in __dbx_link(). |
5622 | Does nothing if the breakpoint hasn't been inserted or has already | |
5623 | been removed. */ | |
5624 | ||
5625 | static void | |
5626 | remove_dbx_link_breakpoint (void) | |
5627 | { | |
5628 | if (dbx_link_bpt_addr == 0) | |
5629 | return; | |
5630 | ||
8181d85f | 5631 | if (deprecated_remove_raw_breakpoint (dbx_link_bpt) != 0) |
8a3fe4f8 | 5632 | warning (_("Unable to remove __dbx_link breakpoint.")); |
9185ddce JB |
5633 | |
5634 | dbx_link_bpt_addr = 0; | |
8181d85f | 5635 | dbx_link_bpt = NULL; |
9185ddce JB |
5636 | } |
5637 | ||
5638 | /* Return the address of the __dbx_link() function in the file | |
5639 | refernced by ABFD by scanning its symbol table. Return 0 if | |
5640 | the symbol was not found. */ | |
5641 | ||
5642 | static CORE_ADDR | |
5643 | dbx_link_addr (bfd *abfd) | |
5644 | { | |
5645 | long storage_needed; | |
5646 | asymbol **symbol_table; | |
5647 | long number_of_symbols; | |
5648 | long i; | |
5649 | ||
5650 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
5651 | if (storage_needed <= 0) | |
5652 | return 0; | |
5653 | ||
5654 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
5655 | make_cleanup (xfree, symbol_table); | |
5656 | ||
5657 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
5658 | ||
5659 | for (i = 0; i < number_of_symbols; i++) | |
5660 | { | |
5661 | asymbol *sym = symbol_table[i]; | |
5662 | ||
5663 | if ((sym->flags & BSF_GLOBAL) | |
5664 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) | |
5665 | return (sym->value + sym->section->vma); | |
5666 | } | |
5667 | ||
5668 | /* Symbol not found, return NULL. */ | |
5669 | return 0; | |
5670 | } | |
5671 | ||
5672 | /* Search the symbol table of the file referenced by FD for a symbol | |
5673 | named __dbx_link(). If found, then insert a breakpoint at this location, | |
5674 | and return nonzero. Return zero otherwise. */ | |
5675 | ||
5676 | static int | |
5677 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
5678 | { | |
5679 | bfd *abfd; | |
5680 | long storage_needed; | |
5681 | CORE_ADDR sym_addr; | |
5682 | ||
5683 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
5684 | if (abfd == NULL) | |
5685 | { | |
8a3fe4f8 | 5686 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); |
9185ddce JB |
5687 | return 0; |
5688 | } | |
5689 | ||
5690 | if (!bfd_check_format (abfd, bfd_object)) | |
5691 | { | |
5692 | /* Not the correct format, so we can not possibly find the dbx_link | |
5693 | symbol in it. */ | |
5694 | bfd_close (abfd); | |
5695 | return 0; | |
5696 | } | |
5697 | ||
5698 | sym_addr = dbx_link_addr (abfd); | |
5699 | if (sym_addr != 0) | |
5700 | { | |
5701 | /* Insert the breakpoint. */ | |
5702 | dbx_link_bpt_addr = sym_addr; | |
8181d85f DJ |
5703 | dbx_link_bpt = deprecated_insert_raw_breakpoint (sym_addr); |
5704 | if (dbx_link_bpt == NULL) | |
9185ddce | 5705 | { |
8a3fe4f8 | 5706 | warning (_("Failed to insert dbx_link breakpoint.")); |
9185ddce JB |
5707 | bfd_close (abfd); |
5708 | return 0; | |
5709 | } | |
5710 | bfd_close (abfd); | |
5711 | return 1; | |
5712 | } | |
5713 | ||
5714 | bfd_close (abfd); | |
5715 | return 0; | |
5716 | } | |
5717 | ||
5718 | /* If the given memory region MAP contains a symbol named __dbx_link, | |
5719 | insert a breakpoint at this location and return nonzero. Return | |
5720 | zero otherwise. */ | |
5721 | ||
5722 | static int | |
5723 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
5724 | int (*child_func) (), | |
5725 | void *data) | |
5726 | { | |
5727 | procinfo *pi = (procinfo *) data; | |
5728 | ||
5729 | /* We know the symbol we're looking for is in a text region, so | |
5730 | only look for it if the region is a text one. */ | |
5731 | if (map->pr_mflags & MA_EXEC) | |
5732 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
5733 | ||
5734 | return 0; | |
5735 | } | |
5736 | ||
5737 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
5738 | insert a breakpoint at its location, and return nonzero. Return zero | |
5739 | otherwise. */ | |
5740 | ||
5741 | static int | |
5742 | insert_dbx_link_breakpoint (procinfo *pi) | |
5743 | { | |
5744 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
5745 | } | |
5746 | ||
388faa48 MS |
5747 | /* |
5748 | * Function: mappingflags | |
5749 | * | |
5750 | * Returns an ascii representation of a memory mapping's flags. | |
5751 | */ | |
c3f6f71d | 5752 | |
388faa48 | 5753 | static char * |
5ae5f592 | 5754 | mappingflags (long flags) |
388faa48 MS |
5755 | { |
5756 | static char asciiflags[8]; | |
5757 | ||
5758 | strcpy (asciiflags, "-------"); | |
5759 | #if defined (MA_PHYS) | |
5760 | if (flags & MA_PHYS) | |
5761 | asciiflags[0] = 'd'; | |
5762 | #endif | |
5763 | if (flags & MA_STACK) | |
5764 | asciiflags[1] = 's'; | |
5765 | if (flags & MA_BREAK) | |
5766 | asciiflags[2] = 'b'; | |
5767 | if (flags & MA_SHARED) | |
5768 | asciiflags[3] = 's'; | |
5769 | if (flags & MA_READ) | |
5770 | asciiflags[4] = 'r'; | |
5771 | if (flags & MA_WRITE) | |
5772 | asciiflags[5] = 'w'; | |
5773 | if (flags & MA_EXEC) | |
5774 | asciiflags[6] = 'x'; | |
5775 | return (asciiflags); | |
5776 | } | |
5777 | ||
831e682e MS |
5778 | /* |
5779 | * Function: info_mappings_callback | |
5780 | * | |
5781 | * Callback function, does the actual work for 'info proc mappings'. | |
5782 | */ | |
5783 | ||
831e682e MS |
5784 | static int |
5785 | info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused) | |
5786 | { | |
0b62613e | 5787 | unsigned int pr_off; |
831e682e | 5788 | |
831e682e | 5789 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5790 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5791 | #else |
0b62613e | 5792 | pr_off = map->pr_off; |
831e682e | 5793 | #endif |
0b62613e PA |
5794 | |
5795 | if (gdbarch_addr_bit (current_gdbarch) == 32) | |
f6a96b83 | 5796 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5797 | (unsigned long) map->pr_vaddr, |
5798 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5799 | (unsigned long) map->pr_size, |
0b62613e PA |
5800 | pr_off, |
5801 | mappingflags (map->pr_mflags)); | |
5802 | else | |
f6a96b83 | 5803 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5804 | (unsigned long) map->pr_vaddr, |
5805 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5806 | (unsigned long) map->pr_size, |
0b62613e PA |
5807 | pr_off, |
5808 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5809 | |
5810 | return 0; | |
5811 | } | |
5812 | ||
388faa48 MS |
5813 | /* |
5814 | * Function: info_proc_mappings | |
5815 | * | |
5816 | * Implement the "info proc mappings" subcommand. | |
5817 | */ | |
5818 | ||
5819 | static void | |
5820 | info_proc_mappings (procinfo *pi, int summary) | |
5821 | { | |
388faa48 MS |
5822 | if (summary) |
5823 | return; /* No output for summary mode. */ | |
5824 | ||
a3f17187 | 5825 | printf_filtered (_("Mapped address spaces:\n\n")); |
0b62613e PA |
5826 | if (gdbarch_ptr_bit (current_gdbarch) == 32) |
5827 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", | |
5828 | "Start Addr", | |
5829 | " End Addr", | |
5830 | " Size", | |
5831 | " Offset", | |
5832 | "Flags"); | |
5833 | else | |
5834 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5835 | "Start Addr", | |
5836 | " End Addr", | |
5837 | " Size", | |
5838 | " Offset", | |
5839 | "Flags"); | |
388faa48 | 5840 | |
831e682e | 5841 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5842 | printf_filtered ("\n"); |
5843 | } | |
5844 | ||
5845 | /* | |
5846 | * Function: info_proc_cmd | |
5847 | * | |
5848 | * Implement the "info proc" command. | |
5849 | */ | |
c3f6f71d JM |
5850 | |
5851 | static void | |
fba45db2 | 5852 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5853 | { |
c3f6f71d | 5854 | struct cleanup *old_chain; |
388faa48 MS |
5855 | procinfo *process = NULL; |
5856 | procinfo *thread = NULL; | |
5857 | char **argv = NULL; | |
5858 | char *tmp = NULL; | |
5859 | int pid = 0; | |
5860 | int tid = 0; | |
5861 | int mappings = 0; | |
c906108c | 5862 | |
c3f6f71d JM |
5863 | old_chain = make_cleanup (null_cleanup, 0); |
5864 | if (args) | |
0fda6bd2 | 5865 | { |
d1a41061 PP |
5866 | argv = gdb_buildargv (args); |
5867 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5868 | } |
c3f6f71d JM |
5869 | while (argv != NULL && *argv != NULL) |
5870 | { | |
5871 | if (isdigit (argv[0][0])) | |
5872 | { | |
5873 | pid = strtoul (argv[0], &tmp, 10); | |
5874 | if (*tmp == '/') | |
5875 | tid = strtoul (++tmp, NULL, 10); | |
5876 | } | |
5877 | else if (argv[0][0] == '/') | |
5878 | { | |
5879 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5880 | } | |
388faa48 MS |
5881 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5882 | { | |
5883 | mappings = 1; | |
5884 | } | |
c3f6f71d JM |
5885 | else |
5886 | { | |
5887 | /* [...] */ | |
5888 | } | |
5889 | argv++; | |
5890 | } | |
5891 | if (pid == 0) | |
39f77062 | 5892 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5893 | if (pid == 0) |
8a3fe4f8 | 5894 | error (_("No current process: you must name one.")); |
c3f6f71d | 5895 | else |
c906108c | 5896 | { |
c3f6f71d JM |
5897 | /* Have pid, will travel. |
5898 | First see if it's a process we're already debugging. */ | |
5899 | process = find_procinfo (pid, 0); | |
5900 | if (process == NULL) | |
5901 | { | |
19958708 | 5902 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5903 | remember to close it again when finished. */ |
5904 | process = create_procinfo (pid, 0); | |
004527cb | 5905 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5906 | if (!open_procinfo_files (process, FD_CTL)) |
5907 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5908 | } | |
c906108c | 5909 | } |
c3f6f71d JM |
5910 | if (tid != 0) |
5911 | thread = create_procinfo (pid, tid); | |
5912 | ||
5913 | if (process) | |
5914 | { | |
a3f17187 | 5915 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5916 | proc_prettyprint_flags (proc_flags (process), 1); |
5917 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5918 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5919 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5920 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5921 | proc_get_nthreads (process)); |
5922 | } | |
5923 | if (thread) | |
5924 | { | |
a3f17187 | 5925 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5926 | proc_prettyprint_flags (proc_flags (thread), 1); |
5927 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5928 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5929 | } | |
5930 | ||
388faa48 MS |
5931 | if (mappings) |
5932 | { | |
5933 | info_proc_mappings (process, 0); | |
5934 | } | |
5935 | ||
c3f6f71d | 5936 | do_cleanups (old_chain); |
c906108c SS |
5937 | } |
5938 | ||
9185ddce JB |
5939 | /* Modify the status of the system call identified by SYSCALLNUM in |
5940 | the set of syscalls that are currently traced/debugged. | |
5941 | ||
5942 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
5943 | will be updated. Otherwise, the exit syscalls set will be updated. | |
5944 | ||
5945 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they | |
5946 | will be disabled. */ | |
5947 | ||
5948 | static void | |
5949 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
5950 | int mode, int from_tty) | |
5951 | { | |
5952 | sysset_t *sysset; | |
5953 | ||
5954 | if (entry_or_exit == PR_SYSENTRY) | |
5955 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5956 | else | |
5957 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5958 | ||
5959 | if (sysset == NULL) | |
5960 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5961 | ||
5962 | if (mode == FLAG_SET) | |
5963 | gdb_praddsysset (sysset, syscallnum); | |
5964 | else | |
5965 | gdb_prdelsysset (sysset, syscallnum); | |
5966 | ||
5967 | if (entry_or_exit == PR_SYSENTRY) | |
5968 | { | |
5969 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5970 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5971 | } | |
5972 | else | |
5973 | { | |
5974 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5975 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5976 | } | |
5977 | } | |
5978 | ||
c3f6f71d | 5979 | static void |
fba45db2 | 5980 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5981 | { |
c3f6f71d | 5982 | procinfo *pi; |
c906108c | 5983 | |
39f77062 | 5984 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5985 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5986 | |
c3f6f71d | 5987 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5988 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5989 | |
39f77062 | 5990 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5991 | if (isdigit (args[0])) |
5992 | { | |
9185ddce | 5993 | const int syscallnum = atoi (args); |
c906108c | 5994 | |
9185ddce | 5995 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5996 | } |
5997 | } | |
5998 | ||
19958708 | 5999 | static void |
fba45db2 | 6000 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 6001 | { |
c3f6f71d JM |
6002 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
6003 | } | |
c906108c | 6004 | |
19958708 | 6005 | static void |
fba45db2 | 6006 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
6007 | { |
6008 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 6009 | } |
c906108c | 6010 | |
19958708 | 6011 | static void |
fba45db2 | 6012 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
6013 | { |
6014 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
6015 | } | |
6016 | ||
19958708 | 6017 | static void |
fba45db2 | 6018 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 6019 | { |
c3f6f71d JM |
6020 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
6021 | } | |
c906108c | 6022 | |
c906108c | 6023 | |
c906108c | 6024 | void |
fba45db2 | 6025 | _initialize_procfs (void) |
c906108c | 6026 | { |
c906108c SS |
6027 | init_procfs_ops (); |
6028 | add_target (&procfs_ops); | |
1bedd215 AC |
6029 | add_info ("proc", info_proc_cmd, _("\ |
6030 | Show /proc process information about any running process.\n\ | |
388faa48 | 6031 | Specify process id, or use the program being debugged by default.\n\ |
1bedd215 | 6032 | Specify keyword 'mappings' for detailed info on memory mappings.")); |
19958708 | 6033 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 6034 | _("Give a trace of entries into the syscall.")); |
19958708 | 6035 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 6036 | _("Give a trace of exits from the syscall.")); |
19958708 | 6037 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 6038 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 6039 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 6040 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
6041 | } |
6042 | ||
6043 | /* =================== END, GDB "MODULE" =================== */ | |
6044 | ||
6045 | ||
6046 | ||
65554fef | 6047 | /* miscellaneous stubs: */ |
c3f6f71d JM |
6048 | /* The following satisfy a few random symbols mostly created by */ |
6049 | /* the solaris threads implementation, which I will chase down */ | |
6050 | /* later. */ | |
6051 | ||
6052 | /* | |
6053 | * Return a pid for which we guarantee | |
6054 | * we will be able to find a 'live' procinfo. | |
6055 | */ | |
6056 | ||
39f77062 | 6057 | ptid_t |
fba45db2 | 6058 | procfs_first_available (void) |
c3f6f71d | 6059 | { |
39f77062 | 6060 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 6061 | } |
be4d1333 | 6062 | |
2020b7ab PA |
6063 | static int |
6064 | find_signalled_thread (struct thread_info *info, void *data) | |
6065 | { | |
6066 | if (info->stop_signal != TARGET_SIGNAL_0 | |
6067 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) | |
6068 | return 1; | |
6069 | ||
6070 | return 0; | |
6071 | } | |
6072 | ||
6073 | static enum target_signal | |
6074 | find_stop_signal (void) | |
6075 | { | |
6076 | struct thread_info *info = | |
6077 | iterate_over_threads (find_signalled_thread, NULL); | |
6078 | ||
6079 | if (info) | |
6080 | return info->stop_signal; | |
6081 | else | |
6082 | return TARGET_SIGNAL_0; | |
6083 | } | |
6084 | ||
be4d1333 | 6085 | /* =================== GCORE .NOTE "MODULE" =================== */ |
65554fef MS |
6086 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
6087 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
6088 | |
6089 | static char * | |
19958708 | 6090 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
6091 | char *note_data, int *note_size, |
6092 | enum target_signal stop_signal) | |
be4d1333 | 6093 | { |
594f7785 | 6094 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
6095 | gdb_gregset_t gregs; |
6096 | gdb_fpregset_t fpregs; | |
6097 | unsigned long merged_pid; | |
6098 | ||
6099 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
6100 | ||
594f7785 | 6101 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
6102 | #if defined (UNIXWARE) |
6103 | note_data = (char *) elfcore_write_lwpstatus (obfd, | |
6104 | note_data, | |
6105 | note_size, | |
19958708 | 6106 | merged_pid, |
65554fef MS |
6107 | stop_signal, |
6108 | &gregs); | |
6109 | #else | |
be4d1333 | 6110 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
6111 | note_data, |
6112 | note_size, | |
19958708 | 6113 | merged_pid, |
be4d1333 | 6114 | stop_signal, |
65554fef MS |
6115 | &gregs); |
6116 | #endif | |
594f7785 | 6117 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
6118 | note_data = (char *) elfcore_write_prfpreg (obfd, |
6119 | note_data, | |
6120 | note_size, | |
6121 | &fpregs, | |
6122 | sizeof (fpregs)); | |
6123 | return note_data; | |
6124 | } | |
6125 | ||
6126 | struct procfs_corefile_thread_data { | |
6127 | bfd *obfd; | |
6128 | char *note_data; | |
6129 | int *note_size; | |
2020b7ab | 6130 | enum target_signal stop_signal; |
be4d1333 MS |
6131 | }; |
6132 | ||
6133 | static int | |
65554fef | 6134 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
6135 | { |
6136 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 6137 | |
2689673f | 6138 | if (pi != NULL) |
be4d1333 MS |
6139 | { |
6140 | ptid_t saved_ptid = inferior_ptid; | |
65554fef | 6141 | inferior_ptid = MERGEPID (pi->pid, thread->tid); |
19958708 RM |
6142 | args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid, |
6143 | args->note_data, | |
2020b7ab PA |
6144 | args->note_size, |
6145 | args->stop_signal); | |
be4d1333 MS |
6146 | inferior_ptid = saved_ptid; |
6147 | } | |
6148 | return 0; | |
6149 | } | |
6150 | ||
6151 | static char * | |
6152 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6153 | { | |
6154 | struct cleanup *old_chain; | |
6155 | gdb_gregset_t gregs; | |
6156 | gdb_fpregset_t fpregs; | |
6157 | char fname[16] = {'\0'}; | |
6158 | char psargs[80] = {'\0'}; | |
6159 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
6160 | char *note_data = NULL; | |
6dbdc4a3 | 6161 | char *inf_args; |
be4d1333 | 6162 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 6163 | gdb_byte *auxv; |
4e73f23d | 6164 | int auxv_len; |
be4d1333 MS |
6165 | |
6166 | if (get_exec_file (0)) | |
6167 | { | |
6168 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
19958708 | 6169 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 6170 | sizeof (psargs)); |
6dbdc4a3 MS |
6171 | |
6172 | inf_args = get_inferior_args (); | |
6173 | if (inf_args && *inf_args && | |
6174 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 6175 | { |
19958708 | 6176 | strncat (psargs, " ", |
be4d1333 | 6177 | sizeof (psargs) - strlen (psargs)); |
19958708 | 6178 | strncat (psargs, inf_args, |
be4d1333 MS |
6179 | sizeof (psargs) - strlen (psargs)); |
6180 | } | |
6181 | } | |
6182 | ||
19958708 RM |
6183 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
6184 | note_data, | |
6185 | note_size, | |
6186 | fname, | |
be4d1333 MS |
6187 | psargs); |
6188 | ||
65554fef | 6189 | #ifdef UNIXWARE |
594f7785 | 6190 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
6191 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
6192 | PIDGET (inferior_ptid), | |
65554fef MS |
6193 | stop_signal, &gregs); |
6194 | #endif | |
6195 | ||
be4d1333 MS |
6196 | thread_args.obfd = obfd; |
6197 | thread_args.note_data = note_data; | |
6198 | thread_args.note_size = note_size; | |
2020b7ab | 6199 | thread_args.stop_signal = find_stop_signal (); |
65554fef MS |
6200 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
6201 | ||
2689673f PA |
6202 | /* There should be always at least one thread. */ |
6203 | gdb_assert (thread_args.note_data != note_data); | |
6204 | note_data = thread_args.note_data; | |
be4d1333 | 6205 | |
13547ab6 DJ |
6206 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
6207 | NULL, &auxv); | |
4e73f23d RM |
6208 | if (auxv_len > 0) |
6209 | { | |
6210 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
6211 | "CORE", NT_AUXV, auxv, auxv_len); | |
6212 | xfree (auxv); | |
6213 | } | |
6214 | ||
be4d1333 MS |
6215 | make_cleanup (xfree, note_data); |
6216 | return note_data; | |
6217 | } | |
65554fef MS |
6218 | #else /* !(Solaris or Unixware) */ |
6219 | static char * | |
6220 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6221 | { | |
8a3fe4f8 | 6222 | error (_("gcore not implemented for this host.")); |
65554fef MS |
6223 | return NULL; /* lint */ |
6224 | } | |
6225 | #endif /* Solaris or Unixware */ | |
be4d1333 | 6226 | /* =================== END GCORE .NOTE "MODULE" =================== */ |