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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
ecd75fc8 | 3 | Copyright (C) 1999-2014 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
45741a9c | 25 | #include "infrun.h" |
c3f6f71d JM |
26 | #include "target.h" |
27 | #include "gdbcore.h" | |
65554fef | 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 29 | #include "gdbcmd.h" |
0fda6bd2 | 30 | #include "gdbthread.h" |
7f7fe91e | 31 | #include "regcache.h" |
28439f5e | 32 | #include "inf-child.h" |
c906108c | 33 | |
c3f6f71d | 34 | #if defined (NEW_PROC_API) |
0df8b418 | 35 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c3f6f71d | 36 | #endif |
c906108c | 37 | |
c3f6f71d | 38 | #include <sys/procfs.h> |
37de36c6 | 39 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 40 | #include <sys/fault.h> |
37de36c6 KB |
41 | #endif |
42 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 43 | #include <sys/syscall.h> |
37de36c6 | 44 | #endif |
2555fe1a | 45 | #include "gdb_wait.h" |
0fda6bd2 JM |
46 | #include <signal.h> |
47 | #include <ctype.h> | |
92107356 | 48 | #include "gdb_bfd.h" |
44270758 | 49 | #include "inflow.h" |
4e73f23d | 50 | #include "auxv.h" |
d1a7880c | 51 | #include "procfs.h" |
27087a3d | 52 | #include "observer.h" |
0fda6bd2 | 53 | |
77382aee PA |
54 | /* This module provides the interface between GDB and the |
55 | /proc file system, which is used on many versions of Unix | |
56 | as a means for debuggers to control other processes. | |
57 | ||
58 | Examples of the systems that use this interface are: | |
59 | ||
60 | Irix | |
61 | Solaris | |
62 | OSF | |
77382aee PA |
63 | AIX5 |
64 | ||
65 | /proc works by imitating a file system: you open a simulated file | |
66 | that represents the process you wish to interact with, and perform | |
67 | operations on that "file" in order to examine or change the state | |
68 | of the other process. | |
69 | ||
70 | The most important thing to know about /proc and this module is | |
71 | that there are two very different interfaces to /proc: | |
72 | ||
73 | One that uses the ioctl system call, and another that uses read | |
74 | and write system calls. | |
75 | ||
76 | This module has to support both /proc interfaces. This means that | |
77 | there are two different ways of doing every basic operation. | |
78 | ||
79 | In order to keep most of the code simple and clean, I have defined | |
80 | an interface "layer" which hides all these system calls. An ifdef | |
81 | (NEW_PROC_API) determines which interface we are using, and most or | |
82 | all occurrances of this ifdef should be confined to this interface | |
83 | layer. */ | |
84 | ||
85 | /* Determine which /proc API we are using: The ioctl API defines | |
86 | PIOCSTATUS, while the read/write (multiple fd) API never does. */ | |
c906108c | 87 | |
c3f6f71d | 88 | #ifdef NEW_PROC_API |
c906108c | 89 | #include <sys/types.h> |
2978b111 | 90 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 91 | #endif |
c906108c | 92 | |
c3f6f71d JM |
93 | #include <fcntl.h> /* for O_RDONLY */ |
94 | #include <unistd.h> /* for "X_OK" */ | |
53ce3c39 | 95 | #include <sys/stat.h> /* for struct stat */ |
c906108c | 96 | |
103b3ef5 MS |
97 | /* Note: procfs-utils.h must be included after the above system header |
98 | files, because it redefines various system calls using macros. | |
99 | This may be incompatible with the prototype declarations. */ | |
100 | ||
103b3ef5 MS |
101 | #include "proc-utils.h" |
102 | ||
77382aee | 103 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
104 | #include "gregset.h" |
105 | ||
c3f6f71d | 106 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 107 | |
77382aee | 108 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 109 | |
c0939df1 | 110 | static void procfs_attach (struct target_ops *, const char *, int); |
52554a0e | 111 | static void procfs_detach (struct target_ops *, const char *, int); |
28439f5e | 112 | static void procfs_resume (struct target_ops *, |
2ea28649 | 113 | ptid_t, int, enum gdb_signal); |
1eab8a48 | 114 | static void procfs_stop (struct target_ops *self, ptid_t); |
a14ed312 | 115 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
116 | static void procfs_fetch_registers (struct target_ops *, |
117 | struct regcache *, int); | |
118 | static void procfs_store_registers (struct target_ops *, | |
119 | struct regcache *, int); | |
94bedb42 TT |
120 | static void procfs_pass_signals (struct target_ops *self, |
121 | int, unsigned char *); | |
7d85a9c0 | 122 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 123 | static void procfs_mourn_inferior (struct target_ops *ops); |
77382aee | 124 | static void procfs_create_inferior (struct target_ops *, char *, |
136d6dae | 125 | char *, char **, int); |
117de6a9 | 126 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 127 | ptid_t, struct target_waitstatus *, int); |
e96027e0 PA |
128 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
129 | const gdb_byte *, | |
130 | ULONGEST, ULONGEST, | |
131 | ULONGEST *); | |
4ac248ca | 132 | static target_xfer_partial_ftype procfs_xfer_partial; |
a14ed312 | 133 | |
28439f5e | 134 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 135 | |
d3581e61 JB |
136 | static void procfs_find_new_threads (struct target_ops *ops); |
137 | static char *procfs_pid_to_str (struct target_ops *, ptid_t); | |
c3f6f71d | 138 | |
2e73927c TT |
139 | static int proc_find_memory_regions (struct target_ops *self, |
140 | find_memory_region_ftype, void *); | |
be4d1333 | 141 | |
fc6691b2 TT |
142 | static char * procfs_make_note_section (struct target_ops *self, |
143 | bfd *, int *); | |
be4d1333 | 144 | |
5461485a TT |
145 | static int procfs_can_use_hw_breakpoint (struct target_ops *self, |
146 | int, int, int); | |
1e03ad20 | 147 | |
7bc112c1 | 148 | static void procfs_info_proc (struct target_ops *, const char *, |
145b16a9 UW |
149 | enum info_proc_what); |
150 | ||
c47ffbe3 | 151 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
152 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
153 | is presented in 64-bit format. We need to provide a custom parser | |
154 | to handle that. */ | |
c47ffbe3 VP |
155 | static int |
156 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
77382aee | 157 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
c47ffbe3 | 158 | { |
f5656ead | 159 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
160 | gdb_byte *ptr = *readptr; |
161 | ||
162 | if (endptr == ptr) | |
163 | return 0; | |
77382aee | 164 | |
c47ffbe3 VP |
165 | if (endptr - ptr < 8 * 2) |
166 | return -1; | |
167 | ||
e17a4113 | 168 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
169 | ptr += 8; |
170 | /* The size of data is always 64-bit. If the application is 32-bit, | |
171 | it will be zero extended, as expected. */ | |
e17a4113 | 172 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
173 | ptr += 8; |
174 | ||
175 | *readptr = ptr; | |
176 | return 1; | |
177 | } | |
178 | #endif | |
179 | ||
d1a7880c | 180 | struct target_ops * |
28439f5e | 181 | procfs_target (void) |
c3f6f71d | 182 | { |
28439f5e PA |
183 | struct target_ops *t = inf_child_target (); |
184 | ||
77382aee PA |
185 | t->to_create_inferior = procfs_create_inferior; |
186 | t->to_kill = procfs_kill_inferior; | |
187 | t->to_mourn_inferior = procfs_mourn_inferior; | |
188 | t->to_attach = procfs_attach; | |
189 | t->to_detach = procfs_detach; | |
190 | t->to_wait = procfs_wait; | |
191 | t->to_resume = procfs_resume; | |
192 | t->to_fetch_registers = procfs_fetch_registers; | |
193 | t->to_store_registers = procfs_store_registers; | |
194 | t->to_xfer_partial = procfs_xfer_partial; | |
2455069d | 195 | t->to_pass_signals = procfs_pass_signals; |
77382aee PA |
196 | t->to_files_info = procfs_files_info; |
197 | t->to_stop = procfs_stop; | |
28439f5e | 198 | |
77382aee PA |
199 | t->to_find_new_threads = procfs_find_new_threads; |
200 | t->to_thread_alive = procfs_thread_alive; | |
201 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 202 | |
77382aee | 203 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
204 | t->to_find_memory_regions = proc_find_memory_regions; |
205 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 206 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
207 | |
208 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 209 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
210 | #endif |
211 | ||
77382aee | 212 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
213 | |
214 | return t; | |
c3f6f71d | 215 | } |
c906108c | 216 | |
c3f6f71d JM |
217 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
218 | ||
77382aee PA |
219 | /* World Unification: |
220 | ||
221 | Put any typedefs, defines etc. here that are required for the | |
222 | unification of code that handles different versions of /proc. */ | |
c3f6f71d JM |
223 | |
224 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 225 | #ifdef WA_READ |
19958708 | 226 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
227 | WRITE_WATCHFLAG = WA_WRITE, |
228 | EXEC_WATCHFLAG = WA_EXEC, | |
229 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
230 | }; | |
231 | #endif | |
232 | #else /* Irix method for watchpoints */ | |
19958708 | 233 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
234 | WRITE_WATCHFLAG = MA_WRITE, |
235 | EXEC_WATCHFLAG = MA_EXEC, | |
236 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
237 | }; | |
238 | #endif | |
239 | ||
37de36c6 KB |
240 | /* gdb_sigset_t */ |
241 | #ifdef HAVE_PR_SIGSET_T | |
242 | typedef pr_sigset_t gdb_sigset_t; | |
243 | #else | |
244 | typedef sigset_t gdb_sigset_t; | |
245 | #endif | |
246 | ||
247 | /* sigaction */ | |
248 | #ifdef HAVE_PR_SIGACTION64_T | |
249 | typedef pr_sigaction64_t gdb_sigaction_t; | |
250 | #else | |
251 | typedef struct sigaction gdb_sigaction_t; | |
252 | #endif | |
253 | ||
254 | /* siginfo */ | |
255 | #ifdef HAVE_PR_SIGINFO64_T | |
256 | typedef pr_siginfo64_t gdb_siginfo_t; | |
257 | #else | |
a5362b9a | 258 | typedef siginfo_t gdb_siginfo_t; |
37de36c6 KB |
259 | #endif |
260 | ||
3c95f01c JB |
261 | /* On mips-irix, praddset and prdelset are defined in such a way that |
262 | they return a value, which causes GCC to emit a -Wunused error | |
263 | because the returned value is not used. Prevent this warning | |
264 | by casting the return value to void. On sparc-solaris, this issue | |
265 | does not exist because the definition of these macros already include | |
266 | that cast to void. */ | |
267 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) | |
268 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) | |
269 | ||
37de36c6 KB |
270 | /* gdb_premptysysset */ |
271 | #ifdef premptysysset | |
272 | #define gdb_premptysysset premptysysset | |
273 | #else | |
274 | #define gdb_premptysysset premptyset | |
275 | #endif | |
276 | ||
277 | /* praddsysset */ | |
278 | #ifdef praddsysset | |
279 | #define gdb_praddsysset praddsysset | |
280 | #else | |
3c95f01c | 281 | #define gdb_praddsysset gdb_praddset |
37de36c6 KB |
282 | #endif |
283 | ||
284 | /* prdelsysset */ | |
285 | #ifdef prdelsysset | |
286 | #define gdb_prdelsysset prdelsysset | |
287 | #else | |
3c95f01c | 288 | #define gdb_prdelsysset gdb_prdelset |
37de36c6 KB |
289 | #endif |
290 | ||
291 | /* prissyssetmember */ | |
292 | #ifdef prissyssetmember | |
293 | #define gdb_pr_issyssetmember prissyssetmember | |
294 | #else | |
295 | #define gdb_pr_issyssetmember prismember | |
296 | #endif | |
297 | ||
298 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
299 | as intuitively descriptive as it could be, so we'll define | |
300 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
301 | this writing, this feature is only found on AIX5 systems and | |
302 | basically means that the set of syscalls is not fixed. I.e, | |
303 | there's no nice table that one can #include to get all of the | |
304 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
305 | for each process. We are at least guaranteed that they won't | |
306 | change over the lifetime of the process. But each process could | |
77382aee | 307 | (in theory) have different syscall numbers. */ |
37de36c6 KB |
308 | #ifdef HAVE_PRSYSENT_T |
309 | #define DYNAMIC_SYSCALLS | |
310 | #endif | |
c3f6f71d JM |
311 | |
312 | ||
313 | ||
314 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
315 | ||
316 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
317 | ||
318 | /* The procinfo struct is a wrapper to hold all the state information | |
319 | concerning a /proc process. There should be exactly one procinfo | |
320 | for each process, and since GDB currently can debug only one | |
321 | process at a time, that means there should be only one procinfo. | |
322 | All of the LWP's of a process can be accessed indirectly thru the | |
323 | single process procinfo. | |
324 | ||
325 | However, against the day when GDB may debug more than one process, | |
326 | this data structure is kept in a list (which for now will hold no | |
327 | more than one member), and many functions will have a pointer to a | |
328 | procinfo as an argument. | |
329 | ||
330 | There will be a separate procinfo structure for use by the (not yet | |
331 | implemented) "info proc" command, so that we can print useful | |
332 | information about any random process without interfering with the | |
0df8b418 | 333 | inferior's procinfo information. */ |
c3f6f71d JM |
334 | |
335 | #ifdef NEW_PROC_API | |
336 | /* format strings for /proc paths */ | |
337 | # ifndef CTL_PROC_NAME_FMT | |
338 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
339 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
340 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
341 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
342 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
343 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
344 | # endif | |
345 | /* the name of the proc status struct depends on the implementation */ | |
346 | typedef pstatus_t gdb_prstatus_t; | |
347 | typedef lwpstatus_t gdb_lwpstatus_t; | |
348 | #else /* ! NEW_PROC_API */ | |
349 | /* format strings for /proc paths */ | |
350 | # ifndef CTL_PROC_NAME_FMT | |
351 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
352 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
353 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
354 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
355 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
356 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
357 | # endif | |
0df8b418 | 358 | /* The name of the proc status struct depends on the implementation. */ |
c5aa993b | 359 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
360 | typedef prstatus_t gdb_lwpstatus_t; |
361 | #endif /* NEW_PROC_API */ | |
c906108c | 362 | |
c3f6f71d JM |
363 | typedef struct procinfo { |
364 | struct procinfo *next; | |
365 | int pid; /* Process ID */ | |
366 | int tid; /* Thread/LWP id */ | |
c906108c | 367 | |
c3f6f71d JM |
368 | /* process state */ |
369 | int was_stopped; | |
370 | int ignore_next_sigstop; | |
c906108c | 371 | |
19958708 | 372 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
373 | several different fd's, depending on the version of /proc |
374 | (old ioctl or new read/write). */ | |
c906108c | 375 | |
c3f6f71d | 376 | int ctl_fd; /* File descriptor for /proc control file */ |
77382aee PA |
377 | |
378 | /* The next three file descriptors are actually only needed in the | |
379 | read/write, multiple-file-descriptor implemenation | |
380 | (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the | |
381 | code, we will use them uniformly by (in the case of the ioctl | |
382 | single-file-descriptor implementation) filling them with copies | |
383 | of the control fd. */ | |
c3f6f71d JM |
384 | int status_fd; /* File descriptor for /proc status file */ |
385 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 386 | |
c3f6f71d | 387 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 388 | |
c3f6f71d | 389 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
390 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
391 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
392 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
393 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 394 | |
c3f6f71d | 395 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 396 | |
c3f6f71d JM |
397 | #ifndef NEW_PROC_API |
398 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 399 | #endif |
37de36c6 KB |
400 | |
401 | #ifdef DYNAMIC_SYSCALLS | |
402 | int num_syscalls; /* Total number of syscalls */ | |
403 | char **syscall_names; /* Syscall number to name map */ | |
404 | #endif | |
19958708 | 405 | |
c3f6f71d | 406 | struct procinfo *thread_list; |
c906108c | 407 | |
c3f6f71d JM |
408 | int status_valid : 1; |
409 | int gregs_valid : 1; | |
410 | int fpregs_valid : 1; | |
411 | int threads_valid: 1; | |
412 | } procinfo; | |
c906108c | 413 | |
c3f6f71d | 414 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 415 | |
c3f6f71d | 416 | /* Function prototypes for procinfo module: */ |
c906108c | 417 | |
a14ed312 KB |
418 | static procinfo *find_procinfo_or_die (int pid, int tid); |
419 | static procinfo *find_procinfo (int pid, int tid); | |
420 | static procinfo *create_procinfo (int pid, int tid); | |
421 | static void destroy_procinfo (procinfo * p); | |
004527cb | 422 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
423 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
424 | static int open_procinfo_files (procinfo * p, int which); | |
425 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
426 | static int sysset_t_size (procinfo *p); |
427 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
428 | #ifdef DYNAMIC_SYSCALLS | |
429 | static void load_syscalls (procinfo *pi); | |
430 | static void free_syscalls (procinfo *pi); | |
431 | static int find_syscall (procinfo *pi, char *name); | |
432 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 433 | |
e9ef4f39 | 434 | static int iterate_over_mappings |
b8edc417 JK |
435 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
436 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 437 | void *data)); |
e9ef4f39 | 438 | |
c3f6f71d JM |
439 | /* The head of the procinfo list: */ |
440 | static procinfo * procinfo_list; | |
c906108c | 441 | |
77382aee PA |
442 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
443 | not found. */ | |
c906108c | 444 | |
19958708 | 445 | static procinfo * |
fba45db2 | 446 | find_procinfo (int pid, int tid) |
c5aa993b | 447 | { |
c3f6f71d | 448 | procinfo *pi; |
c906108c | 449 | |
c3f6f71d JM |
450 | for (pi = procinfo_list; pi; pi = pi->next) |
451 | if (pi->pid == pid) | |
452 | break; | |
c906108c | 453 | |
c3f6f71d JM |
454 | if (pi) |
455 | if (tid) | |
456 | { | |
457 | /* Don't check threads_valid. If we're updating the | |
458 | thread_list, we want to find whatever threads are already | |
459 | here. This means that in general it is the caller's | |
460 | responsibility to check threads_valid and update before | |
461 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 462 | thread. */ |
c3f6f71d JM |
463 | |
464 | for (pi = pi->thread_list; pi; pi = pi->next) | |
465 | if (pi->tid == tid) | |
466 | break; | |
467 | } | |
c906108c | 468 | |
c3f6f71d JM |
469 | return pi; |
470 | } | |
c906108c | 471 | |
77382aee | 472 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 473 | |
c3f6f71d | 474 | static procinfo * |
fba45db2 | 475 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
476 | { |
477 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 478 | |
c3f6f71d | 479 | if (pi == NULL) |
0fda6bd2 JM |
480 | { |
481 | if (tid) | |
3e43a32a MS |
482 | error (_("procfs: couldn't find pid %d " |
483 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
484 | pid, tid); |
485 | else | |
8a3fe4f8 | 486 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 487 | } |
c3f6f71d JM |
488 | return pi; |
489 | } | |
c906108c | 490 | |
77382aee PA |
491 | /* Wrapper for `open'. The appropriate open call is attempted; if |
492 | unsuccessful, it will be retried as many times as needed for the | |
493 | EAGAIN and EINTR conditions. | |
19958708 | 494 | |
77382aee PA |
495 | For other conditions, retry the open a limited number of times. In |
496 | addition, a short sleep is imposed prior to retrying the open. The | |
497 | reason for this sleep is to give the kernel a chance to catch up | |
498 | and create the file in question in the event that GDB "wins" the | |
499 | race to open a file before the kernel has created it. */ | |
19958708 | 500 | |
4d1bcd09 KB |
501 | static int |
502 | open_with_retry (const char *pathname, int flags) | |
503 | { | |
504 | int retries_remaining, status; | |
505 | ||
506 | retries_remaining = 2; | |
507 | ||
508 | while (1) | |
509 | { | |
510 | status = open (pathname, flags); | |
511 | ||
512 | if (status >= 0 || retries_remaining == 0) | |
513 | break; | |
514 | else if (errno != EINTR && errno != EAGAIN) | |
515 | { | |
516 | retries_remaining--; | |
517 | sleep (1); | |
518 | } | |
519 | } | |
520 | ||
521 | return status; | |
522 | } | |
523 | ||
77382aee PA |
524 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
525 | is defined, we only open the control file descriptor; the others | |
526 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), | |
527 | there is only one real file descriptor, but we keep multiple copies | |
528 | of it so that the code that uses them does not have to be #ifdef'd. | |
529 | Returns the file descriptor, or zero for failure. */ | |
c906108c | 530 | |
c3f6f71d | 531 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 532 | |
c3f6f71d | 533 | static int |
fba45db2 | 534 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 535 | { |
0fda6bd2 | 536 | #ifdef NEW_PROC_API |
c3f6f71d | 537 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 538 | #endif |
c3f6f71d JM |
539 | int fd; |
540 | ||
77382aee PA |
541 | /* This function is getting ALMOST long enough to break up into |
542 | several. Here is some rationale: | |
543 | ||
05b4bd79 | 544 | NEW_PROC_API (Solaris 2.6, Solaris 2.7): |
77382aee PA |
545 | There are several file descriptors that may need to be open |
546 | for any given process or LWP. The ones we're intereted in are: | |
547 | - control (ctl) write-only change the state | |
548 | - status (status) read-only query the state | |
549 | - address space (as) read/write access memory | |
550 | - map (map) read-only virtual addr map | |
551 | Most of these are opened lazily as they are needed. | |
552 | The pathnames for the 'files' for an LWP look slightly | |
553 | different from those of a first-class process: | |
554 | Pathnames for a process (<proc-id>): | |
555 | /proc/<proc-id>/ctl | |
556 | /proc/<proc-id>/status | |
557 | /proc/<proc-id>/as | |
558 | /proc/<proc-id>/map | |
559 | Pathnames for an LWP (lwp-id): | |
560 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
561 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
562 | An LWP has no map or address space file descriptor, since | |
563 | the memory map and address space are shared by all LWPs. | |
564 | ||
565 | Everyone else (Solaris 2.5, Irix, OSF) | |
566 | There is only one file descriptor for each process or LWP. | |
567 | For convenience, we copy the same file descriptor into all | |
568 | three fields of the procinfo struct (ctl_fd, status_fd, and | |
569 | as_fd, see NEW_PROC_API above) so that code that uses them | |
570 | doesn't need any #ifdef's. | |
571 | Pathname for all: | |
572 | /proc/<proc-id> | |
573 | ||
574 | Solaris 2.5 LWP's: | |
575 | Each LWP has an independent file descriptor, but these | |
576 | are not obtained via the 'open' system call like the rest: | |
577 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
578 | to the file descriptor of the parent process. | |
579 | ||
580 | OSF threads: | |
581 | These do not even have their own independent file descriptor. | |
582 | All operations are carried out on the file descriptor of the | |
583 | parent process. Therefore we just call open again for each | |
0df8b418 | 584 | thread, getting a new handle for the same 'file'. */ |
c3f6f71d JM |
585 | |
586 | #ifdef NEW_PROC_API | |
77382aee PA |
587 | /* In this case, there are several different file descriptors that |
588 | we might be asked to open. The control file descriptor will be | |
589 | opened early, but the others will be opened lazily as they are | |
590 | needed. */ | |
c3f6f71d JM |
591 | |
592 | strcpy (tmp, pi->pathname); | |
0df8b418 | 593 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
594 | case FD_CTL: |
595 | if (pi->tid) | |
596 | strcat (tmp, "/lwpctl"); | |
597 | else | |
598 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 599 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 600 | if (fd < 0) |
c3f6f71d JM |
601 | return 0; /* fail */ |
602 | pi->ctl_fd = fd; | |
603 | break; | |
604 | case FD_AS: | |
605 | if (pi->tid) | |
0df8b418 | 606 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 607 | strcat (tmp, "/as"); |
4d1bcd09 | 608 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 609 | if (fd < 0) |
c3f6f71d JM |
610 | return 0; /* fail */ |
611 | pi->as_fd = fd; | |
612 | break; | |
613 | case FD_STATUS: | |
614 | if (pi->tid) | |
615 | strcat (tmp, "/lwpstatus"); | |
616 | else | |
617 | strcat (tmp, "/status"); | |
4d1bcd09 | 618 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 619 | if (fd < 0) |
c3f6f71d JM |
620 | return 0; /* fail */ |
621 | pi->status_fd = fd; | |
622 | break; | |
623 | default: | |
624 | return 0; /* unknown file descriptor */ | |
625 | } | |
626 | #else /* not NEW_PROC_API */ | |
77382aee PA |
627 | /* In this case, there is only one file descriptor for each procinfo |
628 | (ie. each process or LWP). In fact, only the file descriptor for | |
629 | the process can actually be opened by an 'open' system call. The | |
630 | ones for the LWPs have to be obtained thru an IOCTL call on the | |
631 | process's file descriptor. | |
632 | ||
633 | For convenience, we copy each procinfo's single file descriptor | |
634 | into all of the fields occupied by the several file descriptors | |
635 | of the NEW_PROC_API implementation. That way, the code that uses | |
636 | them can be written without ifdefs. */ | |
c3f6f71d JM |
637 | |
638 | ||
639 | #ifdef PIOCTSTATUS /* OSF */ | |
0df8b418 | 640 | /* Only one FD; just open it. */ |
e28cade7 | 641 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0) |
c3f6f71d | 642 | return 0; |
0df8b418 | 643 | #else /* Sol 2.5, Irix, other? */ |
c3f6f71d JM |
644 | if (pi->tid == 0) /* Master procinfo for the process */ |
645 | { | |
4d1bcd09 | 646 | fd = open_with_retry (pi->pathname, O_RDWR); |
e28cade7 | 647 | if (fd < 0) |
c3f6f71d JM |
648 | return 0; /* fail */ |
649 | } | |
650 | else /* LWP thread procinfo */ | |
651 | { | |
652 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
653 | procinfo *process; | |
654 | int lwpid = pi->tid; | |
655 | ||
0df8b418 | 656 | /* Find the procinfo for the entire process. */ |
c3f6f71d JM |
657 | if ((process = find_procinfo (pi->pid, 0)) == NULL) |
658 | return 0; /* fail */ | |
659 | ||
0df8b418 | 660 | /* Now obtain the file descriptor for the LWP. */ |
e28cade7 | 661 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0) |
c3f6f71d | 662 | return 0; /* fail */ |
0df8b418 MS |
663 | #else /* Irix, other? */ |
664 | return 0; /* Don't know how to open threads. */ | |
c3f6f71d JM |
665 | #endif /* Sol 2.5 PIOCOPENLWP */ |
666 | } | |
667 | #endif /* OSF PIOCTSTATUS */ | |
668 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
669 | #endif /* NEW_PROC_API */ | |
c906108c | 670 | |
c3f6f71d JM |
671 | return 1; /* success */ |
672 | } | |
c906108c | 673 | |
77382aee PA |
674 | /* Allocate a data structure and link it into the procinfo list. |
675 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
676 | pointer to new procinfo struct. */ | |
c906108c | 677 | |
c3f6f71d | 678 | static procinfo * |
fba45db2 | 679 | create_procinfo (int pid, int tid) |
c3f6f71d | 680 | { |
0b62613e | 681 | procinfo *pi, *parent = NULL; |
c906108c | 682 | |
0d06e24b | 683 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 684 | return pi; /* Already exists, nothing to do. */ |
c906108c | 685 | |
0df8b418 | 686 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
687 | if (tid != 0) |
688 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
689 | create it if it | |
0df8b418 | 690 | doesn't exist yet? */ |
c906108c | 691 | |
c3f6f71d JM |
692 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
693 | memset (pi, 0, sizeof (procinfo)); | |
694 | pi->pid = pid; | |
695 | pi->tid = tid; | |
c906108c | 696 | |
37de36c6 KB |
697 | #ifdef DYNAMIC_SYSCALLS |
698 | load_syscalls (pi); | |
699 | #endif | |
700 | ||
1d5e0602 KB |
701 | pi->saved_entryset = sysset_t_alloc (pi); |
702 | pi->saved_exitset = sysset_t_alloc (pi); | |
703 | ||
c3f6f71d JM |
704 | /* Chain into list. */ |
705 | if (tid == 0) | |
706 | { | |
707 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
708 | pi->next = procinfo_list; | |
709 | procinfo_list = pi; | |
710 | } | |
711 | else | |
712 | { | |
713 | #ifdef NEW_PROC_API | |
714 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
715 | #else | |
716 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
717 | #endif | |
718 | pi->next = parent->thread_list; | |
719 | parent->thread_list = pi; | |
720 | } | |
721 | return pi; | |
722 | } | |
c906108c | 723 | |
77382aee | 724 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 725 | |
c3f6f71d | 726 | static void |
fba45db2 | 727 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
728 | { |
729 | if (pi->ctl_fd > 0) | |
730 | close (pi->ctl_fd); | |
731 | #ifdef NEW_PROC_API | |
732 | if (pi->as_fd > 0) | |
733 | close (pi->as_fd); | |
734 | if (pi->status_fd > 0) | |
735 | close (pi->status_fd); | |
736 | #endif | |
737 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
738 | } | |
c906108c | 739 | |
77382aee | 740 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 741 | |
c3f6f71d | 742 | static void |
fba45db2 | 743 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
744 | { |
745 | procinfo *ptr; | |
746 | ||
77382aee | 747 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
748 | if (pi == *list) |
749 | *list = pi->next; | |
19958708 | 750 | else |
c3f6f71d JM |
751 | for (ptr = *list; ptr; ptr = ptr->next) |
752 | if (ptr->next == pi) | |
753 | { | |
754 | ptr->next = pi->next; | |
755 | break; | |
756 | } | |
7a292a7a | 757 | |
77382aee | 758 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 759 | close_procinfo_files (pi); |
7a292a7a | 760 | |
77382aee | 761 | /* Step three: free the memory. */ |
37de36c6 KB |
762 | #ifdef DYNAMIC_SYSCALLS |
763 | free_syscalls (pi); | |
764 | #endif | |
1d5e0602 KB |
765 | xfree (pi->saved_entryset); |
766 | xfree (pi->saved_exitset); | |
b8c9b27d | 767 | xfree (pi); |
c3f6f71d | 768 | } |
c906108c | 769 | |
c3f6f71d | 770 | static void |
fba45db2 | 771 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
772 | { |
773 | procinfo *tmp; | |
c906108c | 774 | |
0df8b418 | 775 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 776 | { |
0df8b418 | 777 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
778 | destroy_one_procinfo (&tmp->thread_list, pi); |
779 | } | |
0df8b418 | 780 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
781 | { |
782 | /* First destroy the children, if any; */ | |
783 | while (pi->thread_list != NULL) | |
784 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
785 | /* Then destroy the parent. Genocide!!! */ | |
786 | destroy_one_procinfo (&procinfo_list, pi); | |
787 | } | |
788 | } | |
c906108c | 789 | |
004527cb AC |
790 | static void |
791 | do_destroy_procinfo_cleanup (void *pi) | |
792 | { | |
793 | destroy_procinfo (pi); | |
794 | } | |
795 | ||
c3f6f71d | 796 | enum { NOKILL, KILL }; |
c906108c | 797 | |
77382aee PA |
798 | /* To be called on a non_recoverable error for a procinfo. Prints |
799 | error messages, optionally sends a SIGKILL to the process, then | |
800 | destroys the data structure. */ | |
c906108c | 801 | |
c3f6f71d | 802 | static void |
fba45db2 | 803 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
804 | { |
805 | char procfile[80]; | |
c906108c | 806 | |
c3f6f71d JM |
807 | if (pi->pathname) |
808 | { | |
809 | print_sys_errmsg (pi->pathname, errno); | |
810 | } | |
811 | else | |
812 | { | |
813 | sprintf (procfile, "process %d", pi->pid); | |
814 | print_sys_errmsg (procfile, errno); | |
815 | } | |
816 | if (kill_p == KILL) | |
817 | kill (pi->pid, SIGKILL); | |
c906108c | 818 | |
c3f6f71d | 819 | destroy_procinfo (pi); |
0b62613e | 820 | error ("%s", msg); |
c3f6f71d | 821 | } |
c906108c | 822 | |
77382aee PA |
823 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
824 | is just sizeof (sysset_t), but in the case of Monterey/64, the | |
825 | actual size of sysset_t isn't known until runtime. */ | |
37de36c6 KB |
826 | |
827 | static int | |
828 | sysset_t_size (procinfo * pi) | |
829 | { | |
830 | #ifndef DYNAMIC_SYSCALLS | |
831 | return sizeof (sysset_t); | |
832 | #else | |
833 | return sizeof (sysset_t) - sizeof (uint64_t) | |
834 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
835 | / (8 * sizeof (uint64_t))); | |
836 | #endif | |
837 | } | |
838 | ||
77382aee | 839 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
840 | |
841 | static sysset_t * | |
842 | sysset_t_alloc (procinfo * pi) | |
843 | { | |
844 | sysset_t *ret; | |
845 | int size = sysset_t_size (pi); | |
f4a14ae6 | 846 | |
37de36c6 KB |
847 | ret = xmalloc (size); |
848 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
849 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
850 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
851 | #endif |
852 | return ret; | |
853 | } | |
854 | ||
855 | #ifdef DYNAMIC_SYSCALLS | |
856 | ||
77382aee | 857 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
858 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
859 | with the names. (Certain numbers may be skipped in which case the | |
0df8b418 | 860 | names for these numbers will be left as NULL.) */ |
37de36c6 KB |
861 | |
862 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
863 | #define MAX_SYSCALLS 65536 | |
864 | ||
865 | static void | |
866 | load_syscalls (procinfo *pi) | |
867 | { | |
868 | char pathname[MAX_PROC_NAME_SIZE]; | |
869 | int sysent_fd; | |
870 | prsysent_t header; | |
871 | prsyscall_t *syscalls; | |
872 | int i, size, maxcall; | |
e28cade7 | 873 | struct cleanup *cleanups; |
37de36c6 KB |
874 | |
875 | pi->num_syscalls = 0; | |
876 | pi->syscall_names = 0; | |
877 | ||
77382aee | 878 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 879 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 880 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
881 | if (sysent_fd < 0) |
882 | { | |
8a3fe4f8 | 883 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 | 884 | } |
e28cade7 | 885 | cleanups = make_cleanup_close (sysent_fd); |
37de36c6 KB |
886 | |
887 | size = sizeof header - sizeof (prsyscall_t); | |
888 | if (read (sysent_fd, &header, size) != size) | |
889 | { | |
8a3fe4f8 | 890 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
891 | } |
892 | ||
893 | if (header.pr_nsyscalls == 0) | |
894 | { | |
3e43a32a MS |
895 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), |
896 | pi->pid); | |
37de36c6 KB |
897 | } |
898 | ||
899 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
900 | syscalls = xmalloc (size); | |
e28cade7 | 901 | make_cleanup (free_current_contents, &syscalls); |
37de36c6 KB |
902 | |
903 | if (read (sysent_fd, syscalls, size) != size) | |
e28cade7 | 904 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
905 | |
906 | /* Find maximum syscall number. This may not be the same as | |
907 | pr_nsyscalls since that value refers to the number of entries | |
908 | in the table. (Also, the docs indicate that some system | |
0df8b418 | 909 | call numbers may be skipped.) */ |
37de36c6 KB |
910 | |
911 | maxcall = syscalls[0].pr_number; | |
912 | ||
913 | for (i = 1; i < header.pr_nsyscalls; i++) | |
914 | if (syscalls[i].pr_number > maxcall | |
77382aee | 915 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
916 | && syscalls[i].pr_number < MAX_SYSCALLS) |
917 | maxcall = syscalls[i].pr_number; | |
918 | ||
919 | pi->num_syscalls = maxcall+1; | |
920 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
921 | ||
922 | for (i = 0; i < pi->num_syscalls; i++) | |
923 | pi->syscall_names[i] = NULL; | |
924 | ||
77382aee | 925 | /* Read the syscall names in. */ |
37de36c6 KB |
926 | for (i = 0; i < header.pr_nsyscalls; i++) |
927 | { | |
928 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
929 | int nread; | |
930 | int callnum; | |
931 | ||
932 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 933 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
934 | || syscalls[i].pr_nameoff <= 0 |
935 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 936 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
937 | continue; |
938 | ||
939 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
940 | if (nread <= 0) | |
941 | continue; | |
942 | ||
943 | callnum = syscalls[i].pr_number; | |
944 | ||
945 | if (pi->syscall_names[callnum] != NULL) | |
946 | { | |
0df8b418 | 947 | /* FIXME: Generate warning. */ |
37de36c6 KB |
948 | continue; |
949 | } | |
950 | ||
951 | namebuf[nread-1] = '\0'; | |
952 | size = strlen (namebuf) + 1; | |
953 | pi->syscall_names[callnum] = xmalloc (size); | |
954 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
955 | pi->syscall_names[callnum][size-1] = '\0'; | |
956 | } | |
19958708 | 957 | |
e28cade7 | 958 | do_cleanups (cleanups); |
37de36c6 KB |
959 | } |
960 | ||
77382aee | 961 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
962 | structure. */ |
963 | ||
964 | static void | |
965 | free_syscalls (procinfo *pi) | |
966 | { | |
967 | if (pi->syscall_names) | |
968 | { | |
969 | int i; | |
970 | ||
971 | for (i = 0; i < pi->num_syscalls; i++) | |
972 | if (pi->syscall_names[i] != NULL) | |
973 | xfree (pi->syscall_names[i]); | |
974 | ||
975 | xfree (pi->syscall_names); | |
976 | pi->syscall_names = 0; | |
977 | } | |
978 | } | |
979 | ||
77382aee | 980 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 981 | If no match is found, return -1. */ |
19958708 | 982 | |
37de36c6 KB |
983 | static int |
984 | find_syscall (procinfo *pi, char *name) | |
985 | { | |
986 | int i; | |
f4a14ae6 | 987 | |
37de36c6 KB |
988 | for (i = 0; i < pi->num_syscalls; i++) |
989 | { | |
990 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
991 | return i; | |
992 | } | |
993 | return -1; | |
994 | } | |
995 | #endif | |
996 | ||
c3f6f71d | 997 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 998 | |
c3f6f71d | 999 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1000 | |
77382aee PA |
1001 | /* This "module" is the interface layer between the /proc system API |
1002 | and the gdb target vector functions. This layer consists of access | |
1003 | functions that encapsulate each of the basic operations that we | |
1004 | need to use from the /proc API. | |
1005 | ||
1006 | The main motivation for this layer is to hide the fact that there | |
1007 | are two very different implementations of the /proc API. Rather | |
1008 | than have a bunch of #ifdefs all thru the gdb target vector | |
1009 | functions, we do our best to hide them all in here. */ | |
c906108c | 1010 | |
d3581e61 JB |
1011 | static long proc_flags (procinfo * pi); |
1012 | static int proc_why (procinfo * pi); | |
1013 | static int proc_what (procinfo * pi); | |
1014 | static int proc_set_current_signal (procinfo * pi, int signo); | |
1015 | static int proc_get_current_thread (procinfo * pi); | |
1016 | static int proc_iterate_over_threads | |
1017 | (procinfo * pi, | |
1018 | int (*func) (procinfo *, procinfo *, void *), | |
1019 | void *ptr); | |
1020 | ||
1021 | static void | |
fba45db2 | 1022 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1023 | { |
1024 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1025 | print_sys_errmsg (errmsg, errno); | |
1026 | } | |
c906108c | 1027 | |
d3581e61 | 1028 | static void |
fba45db2 | 1029 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1030 | { |
1031 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1032 | perror_with_name (errmsg); | |
1033 | } | |
c906108c | 1034 | |
77382aee PA |
1035 | /* Updates the status struct in the procinfo. There is a 'valid' |
1036 | flag, to let other functions know when this function needs to be | |
1037 | called (so the status is only read when it is needed). The status | |
1038 | file descriptor is also only opened when it is needed. Returns | |
1039 | non-zero for success, zero for failure. */ | |
c906108c | 1040 | |
d3581e61 | 1041 | static int |
fba45db2 | 1042 | proc_get_status (procinfo *pi) |
c3f6f71d | 1043 | { |
0df8b418 | 1044 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
1045 | if (pi->status_fd == 0 && |
1046 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1047 | { | |
1048 | pi->status_valid = 0; | |
1049 | return 0; | |
1050 | } | |
c906108c | 1051 | |
c3f6f71d JM |
1052 | #ifdef NEW_PROC_API |
1053 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1054 | pi->status_valid = 0; /* fail */ | |
1055 | else | |
1056 | { | |
19958708 | 1057 | /* Sigh... I have to read a different data structure, |
0df8b418 | 1058 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 1059 | if (pi->tid) |
19958708 RM |
1060 | pi->status_valid = (read (pi->status_fd, |
1061 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1062 | sizeof (lwpstatus_t)) |
1063 | == sizeof (lwpstatus_t)); | |
1064 | else | |
1065 | { | |
19958708 | 1066 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1067 | (char *) &pi->prstatus, |
1068 | sizeof (gdb_prstatus_t)) | |
1069 | == sizeof (gdb_prstatus_t)); | |
c3f6f71d JM |
1070 | } |
1071 | } | |
1072 | #else /* ioctl method */ | |
1073 | #ifdef PIOCTSTATUS /* osf */ | |
1074 | if (pi->tid == 0) /* main process */ | |
1075 | { | |
0df8b418 | 1076 | /* Just read the danged status. Now isn't that simple? */ |
19958708 | 1077 | pi->status_valid = |
c3f6f71d JM |
1078 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1079 | } | |
1080 | else | |
1081 | { | |
1082 | int win; | |
1083 | struct { | |
1084 | long pr_count; | |
1085 | tid_t pr_error_thread; | |
1086 | struct prstatus status; | |
1087 | } thread_status; | |
1088 | ||
1089 | thread_status.pr_count = 1; | |
1090 | thread_status.status.pr_tid = pi->tid; | |
1091 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1092 | if (win) | |
1093 | { | |
19958708 | 1094 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1095 | sizeof (pi->prstatus)); |
1096 | pi->status_valid = 1; | |
1097 | } | |
1098 | } | |
1099 | #else | |
77382aee | 1100 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1101 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1102 | #endif | |
1103 | #endif | |
c906108c | 1104 | |
c3f6f71d JM |
1105 | if (pi->status_valid) |
1106 | { | |
19958708 | 1107 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1108 | proc_why (pi), |
19958708 | 1109 | proc_what (pi), |
c3f6f71d JM |
1110 | proc_get_current_thread (pi)); |
1111 | } | |
c906108c | 1112 | |
77382aee | 1113 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1114 | pi->gregs_valid = pi->status_valid; |
1115 | #ifdef NEW_PROC_API | |
77382aee PA |
1116 | /* In the read/write multiple-fd model, the status struct includes |
1117 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1118 | pi->fpregs_valid = pi->status_valid; |
1119 | #endif | |
77382aee | 1120 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1121 | } |
c906108c | 1122 | |
77382aee | 1123 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 1124 | |
d3581e61 | 1125 | static long |
fba45db2 | 1126 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1127 | { |
1128 | if (!pi->status_valid) | |
1129 | if (!proc_get_status (pi)) | |
0df8b418 | 1130 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1131 | |
c3f6f71d JM |
1132 | #ifdef NEW_PROC_API |
1133 | return pi->prstatus.pr_lwp.pr_flags; | |
1134 | #else | |
1135 | return pi->prstatus.pr_flags; | |
1136 | #endif | |
1137 | } | |
c906108c | 1138 | |
77382aee | 1139 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1140 | |
d3581e61 | 1141 | static int |
fba45db2 | 1142 | proc_why (procinfo *pi) |
c3f6f71d JM |
1143 | { |
1144 | if (!pi->status_valid) | |
1145 | if (!proc_get_status (pi)) | |
0df8b418 | 1146 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1147 | |
c3f6f71d JM |
1148 | #ifdef NEW_PROC_API |
1149 | return pi->prstatus.pr_lwp.pr_why; | |
1150 | #else | |
1151 | return pi->prstatus.pr_why; | |
1152 | #endif | |
1153 | } | |
c906108c | 1154 | |
77382aee | 1155 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1156 | |
d3581e61 | 1157 | static int |
fba45db2 | 1158 | proc_what (procinfo *pi) |
c3f6f71d JM |
1159 | { |
1160 | if (!pi->status_valid) | |
1161 | if (!proc_get_status (pi)) | |
0df8b418 | 1162 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1163 | |
c3f6f71d JM |
1164 | #ifdef NEW_PROC_API |
1165 | return pi->prstatus.pr_lwp.pr_what; | |
1166 | #else | |
1167 | return pi->prstatus.pr_what; | |
c906108c | 1168 | #endif |
c3f6f71d | 1169 | } |
c906108c | 1170 | |
77382aee PA |
1171 | /* This function is only called when PI is stopped by a watchpoint. |
1172 | Assuming the OS supports it, write to *ADDR the data address which | |
1173 | triggered it and return 1. Return 0 if it is not possible to know | |
1174 | the address. */ | |
bf701c2c PM |
1175 | |
1176 | static int | |
1177 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1178 | { | |
1179 | if (!pi->status_valid) | |
1180 | if (!proc_get_status (pi)) | |
1181 | return 0; | |
1182 | ||
1183 | #ifdef NEW_PROC_API | |
f5656ead TT |
1184 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
1185 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c PM |
1186 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
1187 | #else | |
f5656ead TT |
1188 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
1189 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c PM |
1190 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); |
1191 | #endif | |
1192 | return 1; | |
1193 | } | |
1194 | ||
c3f6f71d | 1195 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1196 | |
1197 | /* Returns the pr_nsysarg field (number of args to the current | |
1198 | syscall). */ | |
c3f6f71d | 1199 | |
d3581e61 | 1200 | static int |
fba45db2 | 1201 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1202 | { |
1203 | if (!pi->status_valid) | |
1204 | if (!proc_get_status (pi)) | |
1205 | return 0; | |
19958708 | 1206 | |
c3f6f71d JM |
1207 | #ifdef NEW_PROC_API |
1208 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1209 | #else | |
1210 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1211 | #endif |
c3f6f71d | 1212 | } |
c906108c | 1213 | |
77382aee PA |
1214 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1215 | syscall). */ | |
c906108c | 1216 | |
d3581e61 | 1217 | static long * |
fba45db2 | 1218 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1219 | { |
1220 | if (!pi->status_valid) | |
1221 | if (!proc_get_status (pi)) | |
1222 | return NULL; | |
19958708 | 1223 | |
c3f6f71d JM |
1224 | #ifdef NEW_PROC_API |
1225 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1226 | #else | |
1227 | return (long *) &pi->prstatus.pr_sysarg; | |
1228 | #endif | |
1229 | } | |
c3f6f71d | 1230 | #endif /* PIOCSSPCACT */ |
c906108c | 1231 | |
d3581e61 | 1232 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
77382aee | 1233 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1234 | |
d3581e61 | 1235 | static long |
c3f6f71d JM |
1236 | proc_cursig (struct procinfo *pi) |
1237 | { | |
1238 | if (!pi->status_valid) | |
1239 | if (!proc_get_status (pi)) | |
0df8b418 | 1240 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1241 | |
c3f6f71d JM |
1242 | #ifdef NEW_PROC_API |
1243 | return pi->prstatus.pr_lwp.pr_cursig; | |
1244 | #else | |
1245 | return pi->prstatus.pr_cursig; | |
1246 | #endif | |
1247 | } | |
d3581e61 | 1248 | #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */ |
c906108c | 1249 | |
77382aee PA |
1250 | /* === I appologize for the messiness of this function. |
1251 | === This is an area where the different versions of | |
1252 | === /proc are more inconsistent than usual. | |
1253 | ||
1254 | Set or reset any of the following process flags: | |
1255 | PR_FORK -- forked child will inherit trace flags | |
1256 | PR_RLC -- traced process runs when last /proc file closed. | |
1257 | PR_KLC -- traced process is killed when last /proc file closed. | |
1258 | PR_ASYNC -- LWP's get to run/stop independently. | |
1259 | ||
1260 | There are three methods for doing this function: | |
1261 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1262 | [Sol6, Sol7, UW] | |
1263 | 2) Middle: PIOCSET/PIOCRESET | |
1264 | [Irix, Sol5] | |
1265 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1266 | [OSF, Sol5] | |
1267 | ||
1268 | Note: Irix does not define PR_ASYNC. | |
1269 | Note: OSF does not define PR_KLC. | |
1270 | Note: OSF is the only one that can ONLY use the oldest method. | |
1271 | ||
1272 | Arguments: | |
1273 | pi -- the procinfo | |
1274 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1275 | mode -- 1 for set, 0 for reset. | |
1276 | ||
1277 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1278 | |
c3f6f71d | 1279 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1280 | |
c3f6f71d | 1281 | static int |
fba45db2 | 1282 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1283 | { |
1284 | long win = 0; /* default to fail */ | |
1285 | ||
77382aee PA |
1286 | /* These operations affect the process as a whole, and applying them |
1287 | to an individual LWP has the same meaning as applying them to the | |
1288 | main process. Therefore, if we're ever called with a pointer to | |
1289 | an LWP's procinfo, let's substitute the process's procinfo and | |
1290 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1291 | |
1292 | if (pi->pid != 0) | |
1293 | pi = find_procinfo_or_die (pi->pid, 0); | |
1294 | ||
05b4bd79 | 1295 | #ifdef NEW_PROC_API /* Newest method: Newer Solarii. */ |
19958708 | 1296 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1297 | (which for no obvious reason has a different definition |
1298 | from one operating system to the next...) */ | |
1299 | #ifdef PCUNSET | |
1300 | #define GDBRESET PCUNSET | |
37de36c6 | 1301 | #else |
c3f6f71d JM |
1302 | #ifdef PCRESET |
1303 | #define GDBRESET PCRESET | |
37de36c6 | 1304 | #endif |
c906108c | 1305 | #endif |
c3f6f71d | 1306 | { |
37de36c6 | 1307 | procfs_ctl_t arg[2]; |
c906108c | 1308 | |
0df8b418 | 1309 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
c3f6f71d | 1310 | arg[0] = PCSET; |
0df8b418 | 1311 | else /* Reset the flag. */ |
c3f6f71d | 1312 | arg[0] = GDBRESET; |
c5aa993b | 1313 | |
c3f6f71d JM |
1314 | arg[1] = flag; |
1315 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1316 | } | |
1317 | #else | |
1318 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
0df8b418 | 1319 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */ |
c3f6f71d JM |
1320 | { |
1321 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1322 | } | |
0df8b418 | 1323 | else /* Reset the flag. */ |
c3f6f71d JM |
1324 | { |
1325 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1326 | } | |
c906108c | 1327 | |
c3f6f71d JM |
1328 | #else |
1329 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1330 | switch (flag) { | |
1331 | case PR_RLC: | |
1332 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1333 | { | |
1334 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1335 | } | |
1336 | else /* Clear run-on-last-close */ | |
1337 | { | |
1338 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1339 | } | |
1340 | break; | |
1341 | case PR_FORK: | |
1342 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1343 | { | |
1344 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1345 | } | |
1346 | else /* Clear inherit-on-fork */ | |
1347 | { | |
1348 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1349 | } | |
1350 | break; | |
1351 | default: | |
0df8b418 | 1352 | win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */ |
c3f6f71d JM |
1353 | break; |
1354 | } | |
1355 | #endif | |
1356 | #endif | |
1357 | #endif | |
1358 | #undef GDBRESET | |
77382aee PA |
1359 | /* The above operation renders the procinfo's cached pstatus |
1360 | obsolete. */ | |
c3f6f71d | 1361 | pi->status_valid = 0; |
c906108c | 1362 | |
c3f6f71d | 1363 | if (!win) |
8a3fe4f8 | 1364 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1365 | flag == PR_FORK ? "PR_FORK" : |
1366 | flag == PR_RLC ? "PR_RLC" : | |
1367 | #ifdef PR_ASYNC | |
1368 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1369 | #endif |
1370 | #ifdef PR_KLC | |
1371 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1372 | #endif |
1373 | "<unknown flag>", | |
1374 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1375 | |
c3f6f71d JM |
1376 | return win; |
1377 | } | |
c906108c | 1378 | |
77382aee PA |
1379 | /* Set the run_on_last_close flag. Process with all threads will |
1380 | become runnable when debugger closes all /proc fds. Returns | |
1381 | non-zero for success, zero for failure. */ | |
c906108c | 1382 | |
d3581e61 | 1383 | static int |
fba45db2 | 1384 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1385 | { |
c3f6f71d JM |
1386 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1387 | } | |
c906108c | 1388 | |
77382aee PA |
1389 | /* Reset the run_on_last_close flag. The process will NOT become |
1390 | runnable when debugger closes its file handles. Returns non-zero | |
1391 | for success, zero for failure. */ | |
c906108c | 1392 | |
d3581e61 | 1393 | static int |
fba45db2 | 1394 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1395 | { |
1396 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1397 | } |
1398 | ||
77382aee PA |
1399 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1400 | are registered for events in the parent, then we will NOT recieve | |
1401 | events from the child. Returns non-zero for success, zero for | |
1402 | failure. */ | |
c906108c | 1403 | |
d3581e61 | 1404 | static int |
fba45db2 | 1405 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1406 | { |
1407 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1408 | } | |
c906108c | 1409 | |
c3f6f71d | 1410 | #ifdef PR_ASYNC |
77382aee PA |
1411 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1412 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1413 | non-zero for success, zero for failure. */ | |
c906108c | 1414 | |
d3581e61 | 1415 | static int |
fba45db2 | 1416 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1417 | { |
1418 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1419 | } | |
c906108c | 1420 | |
77382aee PA |
1421 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1422 | (signal etc.), then all other LWPs will stop as well. Returns | |
1423 | non-zero for success, zero for failure. */ | |
c906108c | 1424 | |
d3581e61 | 1425 | static int |
fba45db2 | 1426 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1427 | { |
1428 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1429 | } | |
1430 | #endif /* PR_ASYNC */ | |
c906108c | 1431 | |
77382aee PA |
1432 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1433 | for success, zero for failure. */ | |
c906108c | 1434 | |
d3581e61 | 1435 | static int |
fba45db2 | 1436 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1437 | { |
1438 | int win; | |
c906108c | 1439 | |
77382aee PA |
1440 | /* We might conceivably apply this operation to an LWP, and the |
1441 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1442 | |
c3f6f71d JM |
1443 | if (pi->ctl_fd == 0 && |
1444 | open_procinfo_files (pi, FD_CTL) == 0) | |
1445 | return 0; | |
1446 | else | |
1447 | { | |
1448 | #ifdef NEW_PROC_API | |
37de36c6 | 1449 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1450 | |
c3f6f71d JM |
1451 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1452 | #else /* ioctl method */ | |
1453 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1454 | /* Note: the call also reads the prstatus. */ | |
1455 | if (win) | |
1456 | { | |
1457 | pi->status_valid = 1; | |
19958708 | 1458 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1459 | proc_why (pi), |
19958708 | 1460 | proc_what (pi), |
c3f6f71d JM |
1461 | proc_get_current_thread (pi)); |
1462 | } | |
1463 | #endif | |
1464 | } | |
c906108c | 1465 | |
c3f6f71d JM |
1466 | return win; |
1467 | } | |
c5aa993b | 1468 | |
77382aee PA |
1469 | /* Wait for the process or LWP to stop (block until it does). Returns |
1470 | non-zero for success, zero for failure. */ | |
c906108c | 1471 | |
d3581e61 | 1472 | static int |
fba45db2 | 1473 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1474 | { |
c3f6f71d JM |
1475 | int win; |
1476 | ||
77382aee PA |
1477 | /* We should never have to apply this operation to any procinfo |
1478 | except the one for the main process. If that ever changes for | |
1479 | any reason, then take out the following clause and replace it | |
1480 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1481 | |
c3f6f71d JM |
1482 | if (pi->tid != 0) |
1483 | pi = find_procinfo_or_die (pi->pid, 0); | |
1484 | ||
1485 | #ifdef NEW_PROC_API | |
1486 | { | |
37de36c6 | 1487 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1488 | |
c3f6f71d JM |
1489 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1490 | /* We been runnin' and we stopped -- need to update status. */ | |
1491 | pi->status_valid = 0; | |
1492 | } | |
1493 | #else /* ioctl method */ | |
1494 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1495 | /* Above call also refreshes the prstatus. */ | |
1496 | if (win) | |
1497 | { | |
1498 | pi->status_valid = 1; | |
19958708 | 1499 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1500 | proc_why (pi), |
19958708 | 1501 | proc_what (pi), |
c3f6f71d JM |
1502 | proc_get_current_thread (pi)); |
1503 | } | |
c906108c SS |
1504 | #endif |
1505 | ||
c3f6f71d | 1506 | return win; |
c906108c SS |
1507 | } |
1508 | ||
77382aee PA |
1509 | /* Make the process or LWP runnable. |
1510 | ||
1511 | Options (not all are implemented): | |
1512 | - single-step | |
1513 | - clear current fault | |
1514 | - clear current signal | |
1515 | - abort the current system call | |
1516 | - stop as soon as finished with system call | |
1517 | - (ioctl): set traced signal set | |
1518 | - (ioctl): set held signal set | |
1519 | - (ioctl): set traced fault set | |
1520 | - (ioctl): set start pc (vaddr) | |
1521 | ||
1522 | Always clears the current fault. PI is the process or LWP to | |
1523 | operate on. If STEP is true, set the process or LWP to trap after | |
1524 | one instruction. If SIGNO is zero, clear the current signal if | |
1525 | any; if non-zero, set the current signal to this one. Returns | |
1526 | non-zero for success, zero for failure. */ | |
c3f6f71d | 1527 | |
d3581e61 | 1528 | static int |
fba45db2 | 1529 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1530 | { |
1531 | int win; | |
1532 | int runflags; | |
1533 | ||
77382aee PA |
1534 | /* We will probably have to apply this operation to individual |
1535 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1536 | |
c3f6f71d JM |
1537 | if (pi->ctl_fd == 0 && |
1538 | open_procinfo_files (pi, FD_CTL) == 0) | |
1539 | { | |
1540 | return 0; | |
1541 | } | |
c906108c | 1542 | |
0df8b418 | 1543 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
1544 | if (step) |
1545 | runflags |= PRSTEP; | |
1546 | if (signo == 0) | |
1547 | runflags |= PRCSIG; | |
0df8b418 | 1548 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 1549 | proc_set_current_signal (pi, signo); |
c5aa993b | 1550 | |
c3f6f71d JM |
1551 | #ifdef NEW_PROC_API |
1552 | { | |
37de36c6 | 1553 | procfs_ctl_t cmd[2]; |
c906108c | 1554 | |
c3f6f71d JM |
1555 | cmd[0] = PCRUN; |
1556 | cmd[1] = runflags; | |
1557 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1558 | } | |
1559 | #else /* ioctl method */ | |
1560 | { | |
1561 | prrun_t prrun; | |
c906108c | 1562 | |
c3f6f71d JM |
1563 | memset (&prrun, 0, sizeof (prrun)); |
1564 | prrun.pr_flags = runflags; | |
1565 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1566 | } | |
1567 | #endif | |
c906108c | 1568 | |
c3f6f71d JM |
1569 | return win; |
1570 | } | |
c906108c | 1571 | |
77382aee PA |
1572 | /* Register to trace signals in the process or LWP. Returns non-zero |
1573 | for success, zero for failure. */ | |
c906108c | 1574 | |
d3581e61 | 1575 | static int |
37de36c6 | 1576 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1577 | { |
c3f6f71d JM |
1578 | int win; |
1579 | ||
77382aee PA |
1580 | /* We should never have to apply this operation to any procinfo |
1581 | except the one for the main process. If that ever changes for | |
1582 | any reason, then take out the following clause and replace it | |
1583 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1584 | |
c3f6f71d JM |
1585 | if (pi->tid != 0) |
1586 | pi = find_procinfo_or_die (pi->pid, 0); | |
1587 | ||
1588 | #ifdef NEW_PROC_API | |
1589 | { | |
1590 | struct { | |
37de36c6 | 1591 | procfs_ctl_t cmd; |
c3f6f71d | 1592 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1593 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1594 | } arg; |
c906108c | 1595 | |
c3f6f71d | 1596 | arg.cmd = PCSTRACE; |
37de36c6 | 1597 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1598 | |
c3f6f71d JM |
1599 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1600 | } | |
1601 | #else /* ioctl method */ | |
1602 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1603 | #endif | |
0df8b418 | 1604 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1605 | pi->status_valid = 0; |
c906108c | 1606 | |
c3f6f71d | 1607 | if (!win) |
8a3fe4f8 | 1608 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1609 | return win; |
c906108c SS |
1610 | } |
1611 | ||
77382aee PA |
1612 | /* Register to trace hardware faults in the process or LWP. Returns |
1613 | non-zero for success, zero for failure. */ | |
c906108c | 1614 | |
d3581e61 | 1615 | static int |
fba45db2 | 1616 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1617 | { |
1618 | int win; | |
1619 | ||
77382aee PA |
1620 | /* We should never have to apply this operation to any procinfo |
1621 | except the one for the main process. If that ever changes for | |
1622 | any reason, then take out the following clause and replace it | |
1623 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1624 | |
c3f6f71d JM |
1625 | if (pi->tid != 0) |
1626 | pi = find_procinfo_or_die (pi->pid, 0); | |
1627 | ||
1628 | #ifdef NEW_PROC_API | |
1629 | { | |
1630 | struct { | |
37de36c6 | 1631 | procfs_ctl_t cmd; |
c3f6f71d JM |
1632 | /* Use char array to avoid alignment issues. */ |
1633 | char fltset[sizeof (fltset_t)]; | |
1634 | } arg; | |
c906108c | 1635 | |
c3f6f71d JM |
1636 | arg.cmd = PCSFAULT; |
1637 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1638 | |
c3f6f71d JM |
1639 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1640 | } | |
1641 | #else /* ioctl method */ | |
1642 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1643 | #endif | |
0df8b418 | 1644 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1645 | pi->status_valid = 0; |
c906108c | 1646 | |
c3f6f71d JM |
1647 | return win; |
1648 | } | |
c5aa993b | 1649 | |
77382aee PA |
1650 | /* Register to trace entry to system calls in the process or LWP. |
1651 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1652 | |
d3581e61 | 1653 | static int |
fba45db2 | 1654 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1655 | { |
c3f6f71d JM |
1656 | int win; |
1657 | ||
77382aee PA |
1658 | /* We should never have to apply this operation to any procinfo |
1659 | except the one for the main process. If that ever changes for | |
1660 | any reason, then take out the following clause and replace it | |
1661 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1662 | |
c3f6f71d JM |
1663 | if (pi->tid != 0) |
1664 | pi = find_procinfo_or_die (pi->pid, 0); | |
1665 | ||
1666 | #ifdef NEW_PROC_API | |
1667 | { | |
37de36c6 KB |
1668 | struct gdb_proc_ctl_pcsentry { |
1669 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1670 | /* Use char array to avoid alignment issues. */ |
1671 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1672 | } *argp; |
1673 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1674 | - sizeof (sysset_t) |
37de36c6 | 1675 | + sysset_t_size (pi); |
c3f6f71d | 1676 | |
37de36c6 | 1677 | argp = xmalloc (argp_size); |
c3f6f71d | 1678 | |
37de36c6 KB |
1679 | argp->cmd = PCSENTRY; |
1680 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1681 | ||
1682 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1683 | xfree (argp); | |
c3f6f71d JM |
1684 | } |
1685 | #else /* ioctl method */ | |
1686 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1687 | #endif | |
77382aee PA |
1688 | /* The above operation renders the procinfo's cached pstatus |
1689 | obsolete. */ | |
c3f6f71d | 1690 | pi->status_valid = 0; |
19958708 | 1691 | |
c3f6f71d | 1692 | return win; |
c906108c SS |
1693 | } |
1694 | ||
77382aee PA |
1695 | /* Register to trace exit from system calls in the process or LWP. |
1696 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1697 | |
d3581e61 | 1698 | static int |
fba45db2 | 1699 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1700 | { |
1701 | int win; | |
1702 | ||
77382aee PA |
1703 | /* We should never have to apply this operation to any procinfo |
1704 | except the one for the main process. If that ever changes for | |
1705 | any reason, then take out the following clause and replace it | |
1706 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1707 | |
c3f6f71d JM |
1708 | if (pi->tid != 0) |
1709 | pi = find_procinfo_or_die (pi->pid, 0); | |
1710 | ||
1711 | #ifdef NEW_PROC_API | |
1712 | { | |
37de36c6 KB |
1713 | struct gdb_proc_ctl_pcsexit { |
1714 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1715 | /* Use char array to avoid alignment issues. */ |
1716 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1717 | } *argp; |
1718 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1719 | - sizeof (sysset_t) |
37de36c6 | 1720 | + sysset_t_size (pi); |
c906108c | 1721 | |
37de36c6 | 1722 | argp = xmalloc (argp_size); |
c906108c | 1723 | |
37de36c6 KB |
1724 | argp->cmd = PCSEXIT; |
1725 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1726 | ||
1727 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1728 | xfree (argp); | |
c3f6f71d JM |
1729 | } |
1730 | #else /* ioctl method */ | |
1731 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1732 | #endif | |
77382aee PA |
1733 | /* The above operation renders the procinfo's cached pstatus |
1734 | obsolete. */ | |
c3f6f71d | 1735 | pi->status_valid = 0; |
c906108c | 1736 | |
c3f6f71d JM |
1737 | return win; |
1738 | } | |
c906108c | 1739 | |
77382aee PA |
1740 | /* Specify the set of blocked / held signals in the process or LWP. |
1741 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1742 | |
d3581e61 | 1743 | static int |
37de36c6 | 1744 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1745 | { |
c3f6f71d JM |
1746 | int win; |
1747 | ||
77382aee PA |
1748 | /* We should never have to apply this operation to any procinfo |
1749 | except the one for the main process. If that ever changes for | |
1750 | any reason, then take out the following clause and replace it | |
1751 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1752 | |
c3f6f71d JM |
1753 | if (pi->tid != 0) |
1754 | pi = find_procinfo_or_die (pi->pid, 0); | |
1755 | ||
1756 | #ifdef NEW_PROC_API | |
1757 | { | |
1758 | struct { | |
37de36c6 | 1759 | procfs_ctl_t cmd; |
c3f6f71d | 1760 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1761 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1762 | } arg; |
1763 | ||
1764 | arg.cmd = PCSHOLD; | |
37de36c6 | 1765 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1766 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1767 | } | |
c906108c | 1768 | #else |
c3f6f71d | 1769 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1770 | #endif |
77382aee PA |
1771 | /* The above operation renders the procinfo's cached pstatus |
1772 | obsolete. */ | |
c3f6f71d JM |
1773 | pi->status_valid = 0; |
1774 | ||
1775 | return win; | |
c906108c SS |
1776 | } |
1777 | ||
77382aee PA |
1778 | /* Returns the set of signals that are held / blocked. Will also copy |
1779 | the sigset if SAVE is non-zero. */ | |
c906108c | 1780 | |
d3581e61 | 1781 | static gdb_sigset_t * |
37de36c6 | 1782 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1783 | { |
37de36c6 | 1784 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1785 | |
77382aee PA |
1786 | /* We should never have to apply this operation to any procinfo |
1787 | except the one for the main process. If that ever changes for | |
1788 | any reason, then take out the following clause and replace it | |
1789 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1790 | |
c3f6f71d JM |
1791 | if (pi->tid != 0) |
1792 | pi = find_procinfo_or_die (pi->pid, 0); | |
1793 | ||
1794 | #ifdef NEW_PROC_API | |
1795 | if (!pi->status_valid) | |
1796 | if (!proc_get_status (pi)) | |
1797 | return NULL; | |
1798 | ||
c3f6f71d | 1799 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d JM |
1800 | #else /* not NEW_PROC_API */ |
1801 | { | |
37de36c6 | 1802 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1803 | |
1804 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1805 | ret = &sigheld; | |
1806 | } | |
1807 | #endif /* NEW_PROC_API */ | |
1808 | if (save && ret) | |
37de36c6 | 1809 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1810 | |
1811 | return ret; | |
c906108c SS |
1812 | } |
1813 | ||
77382aee PA |
1814 | /* Returns the set of signals that are traced / debugged. Will also |
1815 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1816 | |
d3581e61 | 1817 | static gdb_sigset_t * |
37de36c6 | 1818 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1819 | { |
37de36c6 | 1820 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1821 | |
77382aee PA |
1822 | /* We should never have to apply this operation to any procinfo |
1823 | except the one for the main process. If that ever changes for | |
1824 | any reason, then take out the following clause and replace it | |
1825 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1826 | |
c3f6f71d JM |
1827 | if (pi->tid != 0) |
1828 | pi = find_procinfo_or_die (pi->pid, 0); | |
1829 | ||
1830 | #ifdef NEW_PROC_API | |
1831 | if (!pi->status_valid) | |
1832 | if (!proc_get_status (pi)) | |
1833 | return NULL; | |
1834 | ||
1835 | ret = &pi->prstatus.pr_sigtrace; | |
1836 | #else | |
1837 | { | |
37de36c6 | 1838 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
1839 | |
1840 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1841 | ret = &sigtrace; | |
1842 | } | |
c906108c | 1843 | #endif |
c3f6f71d | 1844 | if (save && ret) |
37de36c6 | 1845 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1846 | |
c3f6f71d JM |
1847 | return ret; |
1848 | } | |
c906108c | 1849 | |
77382aee PA |
1850 | /* Returns the set of hardware faults that are traced /debugged. Will |
1851 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1852 | |
d3581e61 | 1853 | static fltset_t * |
fba45db2 | 1854 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1855 | { |
1856 | fltset_t *ret = NULL; | |
1857 | ||
77382aee PA |
1858 | /* We should never have to apply this operation to any procinfo |
1859 | except the one for the main process. If that ever changes for | |
1860 | any reason, then take out the following clause and replace it | |
1861 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1862 | |
c3f6f71d JM |
1863 | if (pi->tid != 0) |
1864 | pi = find_procinfo_or_die (pi->pid, 0); | |
1865 | ||
1866 | #ifdef NEW_PROC_API | |
1867 | if (!pi->status_valid) | |
1868 | if (!proc_get_status (pi)) | |
1869 | return NULL; | |
1870 | ||
1871 | ret = &pi->prstatus.pr_flttrace; | |
1872 | #else | |
1873 | { | |
1874 | static fltset_t flttrace; | |
1875 | ||
1876 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
1877 | ret = &flttrace; | |
1878 | } | |
1879 | #endif | |
1880 | if (save && ret) | |
1881 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1882 | |
c3f6f71d JM |
1883 | return ret; |
1884 | } | |
c906108c | 1885 | |
77382aee PA |
1886 | /* Returns the set of syscalls that are traced /debugged on entry. |
1887 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1888 | |
d3581e61 | 1889 | static sysset_t * |
fba45db2 | 1890 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1891 | { |
1892 | sysset_t *ret = NULL; | |
1893 | ||
77382aee PA |
1894 | /* We should never have to apply this operation to any procinfo |
1895 | except the one for the main process. If that ever changes for | |
1896 | any reason, then take out the following clause and replace it | |
1897 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1898 | |
c3f6f71d JM |
1899 | if (pi->tid != 0) |
1900 | pi = find_procinfo_or_die (pi->pid, 0); | |
1901 | ||
1902 | #ifdef NEW_PROC_API | |
1903 | if (!pi->status_valid) | |
1904 | if (!proc_get_status (pi)) | |
1905 | return NULL; | |
1906 | ||
37de36c6 | 1907 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1908 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
1909 | #else /* DYNAMIC_SYSCALLS */ |
1910 | { | |
1911 | static sysset_t *sysentry; | |
1912 | size_t size; | |
1913 | ||
1914 | if (!sysentry) | |
1915 | sysentry = sysset_t_alloc (pi); | |
1916 | ret = sysentry; | |
1917 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1918 | return NULL; | |
1919 | if (pi->prstatus.pr_sysentry_offset == 0) | |
1920 | { | |
1921 | gdb_premptysysset (sysentry); | |
1922 | } | |
1923 | else | |
1924 | { | |
1925 | int rsize; | |
1926 | ||
1927 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 1928 | SEEK_SET) |
37de36c6 KB |
1929 | != (off_t) pi->prstatus.pr_sysentry_offset) |
1930 | return NULL; | |
1931 | size = sysset_t_size (pi); | |
1932 | gdb_premptysysset (sysentry); | |
1933 | rsize = read (pi->status_fd, sysentry, size); | |
1934 | if (rsize < 0) | |
1935 | return NULL; | |
1936 | } | |
1937 | } | |
1938 | #endif /* DYNAMIC_SYSCALLS */ | |
1939 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
1940 | { |
1941 | static sysset_t sysentry; | |
c906108c | 1942 | |
c3f6f71d JM |
1943 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
1944 | ret = &sysentry; | |
1945 | } | |
37de36c6 | 1946 | #endif /* NEW_PROC_API */ |
c3f6f71d | 1947 | if (save && ret) |
37de36c6 | 1948 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 1949 | |
c3f6f71d JM |
1950 | return ret; |
1951 | } | |
c5aa993b | 1952 | |
77382aee PA |
1953 | /* Returns the set of syscalls that are traced /debugged on exit. |
1954 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1955 | |
d3581e61 | 1956 | static sysset_t * |
fba45db2 | 1957 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1958 | { |
c3f6f71d JM |
1959 | sysset_t * ret = NULL; |
1960 | ||
77382aee PA |
1961 | /* We should never have to apply this operation to any procinfo |
1962 | except the one for the main process. If that ever changes for | |
1963 | any reason, then take out the following clause and replace it | |
1964 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1965 | |
c3f6f71d JM |
1966 | if (pi->tid != 0) |
1967 | pi = find_procinfo_or_die (pi->pid, 0); | |
1968 | ||
1969 | #ifdef NEW_PROC_API | |
1970 | if (!pi->status_valid) | |
1971 | if (!proc_get_status (pi)) | |
1972 | return NULL; | |
1973 | ||
37de36c6 | 1974 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1975 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
1976 | #else /* DYNAMIC_SYSCALLS */ |
1977 | { | |
1978 | static sysset_t *sysexit; | |
1979 | size_t size; | |
1980 | ||
1981 | if (!sysexit) | |
1982 | sysexit = sysset_t_alloc (pi); | |
1983 | ret = sysexit; | |
1984 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1985 | return NULL; | |
1986 | if (pi->prstatus.pr_sysexit_offset == 0) | |
1987 | { | |
1988 | gdb_premptysysset (sysexit); | |
1989 | } | |
1990 | else | |
1991 | { | |
1992 | int rsize; | |
1993 | ||
77382aee PA |
1994 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
1995 | SEEK_SET) | |
37de36c6 KB |
1996 | != (off_t) pi->prstatus.pr_sysexit_offset) |
1997 | return NULL; | |
1998 | size = sysset_t_size (pi); | |
1999 | gdb_premptysysset (sysexit); | |
2000 | rsize = read (pi->status_fd, sysexit, size); | |
2001 | if (rsize < 0) | |
2002 | return NULL; | |
2003 | } | |
2004 | } | |
2005 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2006 | #else |
2007 | { | |
2008 | static sysset_t sysexit; | |
c5aa993b | 2009 | |
c3f6f71d JM |
2010 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2011 | ret = &sysexit; | |
2012 | } | |
2013 | #endif | |
2014 | if (save && ret) | |
37de36c6 | 2015 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2016 | |
2017 | return ret; | |
2018 | } | |
c906108c | 2019 | |
77382aee PA |
2020 | /* The current fault (if any) is cleared; the associated signal will |
2021 | not be sent to the process or LWP when it resumes. Returns | |
2022 | non-zero for success, zero for failure. */ | |
c906108c | 2023 | |
d3581e61 | 2024 | static int |
fba45db2 | 2025 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2026 | { |
2027 | int win; | |
2028 | ||
77382aee PA |
2029 | /* We should never have to apply this operation to any procinfo |
2030 | except the one for the main process. If that ever changes for | |
2031 | any reason, then take out the following clause and replace it | |
2032 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2033 | |
c3f6f71d JM |
2034 | if (pi->tid != 0) |
2035 | pi = find_procinfo_or_die (pi->pid, 0); | |
2036 | ||
2037 | #ifdef NEW_PROC_API | |
2038 | { | |
37de36c6 | 2039 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2040 | |
c3f6f71d JM |
2041 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2042 | } | |
2043 | #else | |
2044 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2045 | #endif | |
2046 | ||
2047 | return win; | |
c906108c SS |
2048 | } |
2049 | ||
77382aee PA |
2050 | /* Set the "current signal" that will be delivered next to the |
2051 | process. NOTE: semantics are different from those of KILL. This | |
2052 | signal will be delivered to the process or LWP immediately when it | |
2053 | is resumed (even if the signal is held/blocked); it will NOT | |
2054 | immediately cause another event of interest, and will NOT first | |
2055 | trap back to the debugger. Returns non-zero for success, zero for | |
2056 | failure. */ | |
c3f6f71d | 2057 | |
d3581e61 | 2058 | static int |
fba45db2 | 2059 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2060 | { |
2061 | int win; | |
2062 | struct { | |
37de36c6 | 2063 | procfs_ctl_t cmd; |
c3f6f71d | 2064 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2065 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2066 | } arg; |
73930d4d | 2067 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2068 | ptid_t wait_ptid; |
2069 | struct target_waitstatus wait_status; | |
c3f6f71d | 2070 | |
77382aee PA |
2071 | /* We should never have to apply this operation to any procinfo |
2072 | except the one for the main process. If that ever changes for | |
2073 | any reason, then take out the following clause and replace it | |
2074 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2075 | |
c3f6f71d JM |
2076 | if (pi->tid != 0) |
2077 | pi = find_procinfo_or_die (pi->pid, 0); | |
2078 | ||
2079 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2080 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2081 | receives a PIOCSSIG with a signal identical to the current |
2082 | signal, it messes up the current signal. Work around the kernel | |
2083 | bug. */ | |
c3f6f71d JM |
2084 | if (signo > 0 && |
2085 | signo == proc_cursig (pi)) | |
0df8b418 | 2086 | return 1; /* I assume this is a success? */ |
c3f6f71d JM |
2087 | #endif |
2088 | ||
2089 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2090 | get_last_target_status (&wait_ptid, &wait_status); |
2091 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2092 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 2093 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 JM |
2094 | && proc_get_status (pi) |
2095 | #ifdef NEW_PROC_API | |
2096 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2097 | #else | |
2098 | && pi->prstatus.pr_info.si_signo == signo | |
2099 | #endif | |
2100 | ) | |
2101 | /* Use the siginfo associated with the signal being | |
2102 | redelivered. */ | |
2103 | #ifdef NEW_PROC_API | |
73930d4d | 2104 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2105 | #else |
73930d4d | 2106 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2107 | #endif |
2108 | else | |
2109 | { | |
73930d4d KH |
2110 | mysinfo.si_signo = signo; |
2111 | mysinfo.si_code = 0; | |
2112 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2113 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2114 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2115 | } |
c3f6f71d JM |
2116 | |
2117 | #ifdef NEW_PROC_API | |
2118 | arg.cmd = PCSSIG; | |
2119 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2120 | #else | |
2121 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2122 | #endif | |
c906108c | 2123 | |
c3f6f71d JM |
2124 | return win; |
2125 | } | |
c906108c | 2126 | |
77382aee PA |
2127 | /* The current signal (if any) is cleared, and is not sent to the |
2128 | process or LWP when it resumes. Returns non-zero for success, zero | |
2129 | for failure. */ | |
c906108c | 2130 | |
d3581e61 | 2131 | static int |
fba45db2 | 2132 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2133 | { |
2134 | int win; | |
2135 | ||
77382aee PA |
2136 | /* We should never have to apply this operation to any procinfo |
2137 | except the one for the main process. If that ever changes for | |
2138 | any reason, then take out the following clause and replace it | |
2139 | with one that makes sure the ctl_fd is open. */ | |
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 | { | |
2146 | struct { | |
37de36c6 | 2147 | procfs_ctl_t cmd; |
c3f6f71d | 2148 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2149 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2150 | } arg; |
73930d4d | 2151 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2152 | |
2153 | arg.cmd = PCSSIG; | |
2154 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2155 | mysinfo.si_signo = 0; |
2156 | mysinfo.si_code = 0; | |
2157 | mysinfo.si_errno = 0; | |
2158 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2159 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2160 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2161 | |
2162 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2163 | } | |
2164 | #else | |
2165 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2166 | #endif | |
c906108c | 2167 | |
c3f6f71d JM |
2168 | return win; |
2169 | } | |
c906108c | 2170 | |
772cf8be MK |
2171 | /* Return the general-purpose registers for the process or LWP |
2172 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2173 | |
d3581e61 | 2174 | static gdb_gregset_t * |
fba45db2 | 2175 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2176 | { |
2177 | if (!pi->status_valid || !pi->gregs_valid) | |
2178 | if (!proc_get_status (pi)) | |
2179 | return NULL; | |
2180 | ||
c3f6f71d | 2181 | #ifdef NEW_PROC_API |
c3f6f71d | 2182 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be | 2183 | #else |
c3f6f71d | 2184 | return &pi->prstatus.pr_reg; |
772cf8be | 2185 | #endif |
c3f6f71d | 2186 | } |
c5aa993b | 2187 | |
772cf8be MK |
2188 | /* Return the general-purpose registers for the process or LWP |
2189 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2190 | |
d3581e61 | 2191 | static gdb_fpregset_t * |
fba45db2 | 2192 | proc_get_fpregs (procinfo *pi) |
c906108c | 2193 | { |
c3f6f71d JM |
2194 | #ifdef NEW_PROC_API |
2195 | if (!pi->status_valid || !pi->fpregs_valid) | |
2196 | if (!proc_get_status (pi)) | |
2197 | return NULL; | |
2198 | ||
c3f6f71d | 2199 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c5aa993b | 2200 | |
772cf8be | 2201 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2202 | if (pi->fpregs_valid) |
772cf8be | 2203 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2204 | else |
c906108c | 2205 | { |
772cf8be | 2206 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2207 | { |
c3f6f71d | 2208 | return NULL; |
c906108c | 2209 | } |
c3f6f71d | 2210 | else |
c906108c | 2211 | { |
772cf8be | 2212 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2213 | struct { |
2214 | long pr_count; | |
2215 | tid_t pr_error_thread; | |
2216 | tfpregset_t thread_1; | |
2217 | } thread_fpregs; | |
2218 | ||
2219 | thread_fpregs.pr_count = 1; | |
2220 | thread_fpregs.thread_1.tid = pi->tid; | |
2221 | ||
772cf8be MK |
2222 | if (pi->tid == 0 |
2223 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2224 | { |
2225 | pi->fpregs_valid = 1; | |
772cf8be | 2226 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2227 | } |
772cf8be MK |
2228 | else if (pi->tid != 0 |
2229 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2230 | { |
2231 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2232 | sizeof (pi->fpregset)); | |
2233 | pi->fpregs_valid = 1; | |
772cf8be | 2234 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2235 | } |
2236 | else | |
2237 | { | |
2238 | return NULL; | |
2239 | } | |
772cf8be | 2240 | # else |
c3f6f71d JM |
2241 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2242 | { | |
2243 | pi->fpregs_valid = 1; | |
772cf8be | 2244 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2245 | } |
2246 | else | |
2247 | { | |
2248 | return NULL; | |
2249 | } | |
772cf8be | 2250 | # endif |
c906108c | 2251 | } |
c906108c | 2252 | } |
772cf8be | 2253 | #endif /* NEW_PROC_API */ |
c906108c SS |
2254 | } |
2255 | ||
772cf8be MK |
2256 | /* Write the general-purpose registers back to the process or LWP |
2257 | corresponding to PI. Return non-zero for success, zero for | |
2258 | failure. */ | |
c3f6f71d | 2259 | |
d3581e61 | 2260 | static int |
fba45db2 | 2261 | proc_set_gregs (procinfo *pi) |
c906108c | 2262 | { |
c3f6f71d JM |
2263 | gdb_gregset_t *gregs; |
2264 | int win; | |
c5aa993b | 2265 | |
772cf8be MK |
2266 | gregs = proc_get_gregs (pi); |
2267 | if (gregs == NULL) | |
2268 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2269 | |
772cf8be | 2270 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2271 | { |
c3f6f71d | 2272 | return 0; |
c906108c | 2273 | } |
c3f6f71d | 2274 | else |
c906108c | 2275 | { |
c3f6f71d JM |
2276 | #ifdef NEW_PROC_API |
2277 | struct { | |
37de36c6 | 2278 | procfs_ctl_t cmd; |
c3f6f71d JM |
2279 | /* Use char array to avoid alignment issues. */ |
2280 | char gregs[sizeof (gdb_gregset_t)]; | |
2281 | } arg; | |
2282 | ||
772cf8be | 2283 | arg.cmd = PCSREG; |
c3f6f71d JM |
2284 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2285 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2286 | #else | |
2287 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2288 | #endif | |
c906108c | 2289 | } |
c3f6f71d | 2290 | |
772cf8be | 2291 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2292 | pi->gregs_valid = 0; |
2293 | return win; | |
c906108c SS |
2294 | } |
2295 | ||
772cf8be MK |
2296 | /* Write the floating-pointer registers back to the process or LWP |
2297 | corresponding to PI. Return non-zero for success, zero for | |
2298 | failure. */ | |
c3f6f71d | 2299 | |
d3581e61 | 2300 | static int |
fba45db2 | 2301 | proc_set_fpregs (procinfo *pi) |
c906108c | 2302 | { |
c3f6f71d JM |
2303 | gdb_fpregset_t *fpregs; |
2304 | int win; | |
2305 | ||
772cf8be MK |
2306 | fpregs = proc_get_fpregs (pi); |
2307 | if (fpregs == NULL) | |
2308 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2309 | |
772cf8be | 2310 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2311 | { |
c3f6f71d | 2312 | return 0; |
c906108c | 2313 | } |
c3f6f71d | 2314 | else |
c906108c | 2315 | { |
c3f6f71d JM |
2316 | #ifdef NEW_PROC_API |
2317 | struct { | |
37de36c6 | 2318 | procfs_ctl_t cmd; |
c3f6f71d JM |
2319 | /* Use char array to avoid alignment issues. */ |
2320 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2321 | } arg; | |
2322 | ||
772cf8be | 2323 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2324 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2325 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2326 | #else | |
772cf8be | 2327 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2328 | if (pi->tid == 0) |
2329 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2330 | else | |
2331 | { | |
2332 | struct { | |
2333 | long pr_count; | |
2334 | tid_t pr_error_thread; | |
2335 | tfpregset_t thread_1; | |
2336 | } thread_fpregs; | |
2337 | ||
2338 | thread_fpregs.pr_count = 1; | |
2339 | thread_fpregs.thread_1.tid = pi->tid; | |
2340 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2341 | sizeof (*fpregs)); | |
2342 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2343 | } | |
772cf8be | 2344 | # else |
c3f6f71d | 2345 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2346 | # endif |
2347 | #endif /* NEW_PROC_API */ | |
c906108c | 2348 | } |
c3f6f71d | 2349 | |
772cf8be | 2350 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2351 | pi->fpregs_valid = 0; |
2352 | return win; | |
c906108c SS |
2353 | } |
2354 | ||
77382aee PA |
2355 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2356 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2357 | |
d3581e61 | 2358 | static int |
fba45db2 | 2359 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2360 | { |
2361 | int win; | |
c906108c | 2362 | |
77382aee PA |
2363 | /* We might conceivably apply this operation to an LWP, and the |
2364 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2365 | |
c3f6f71d JM |
2366 | if (pi->ctl_fd == 0 && |
2367 | open_procinfo_files (pi, FD_CTL) == 0) | |
2368 | { | |
2369 | return 0; | |
2370 | } | |
2371 | else | |
2372 | { | |
2373 | #ifdef NEW_PROC_API | |
37de36c6 | 2374 | procfs_ctl_t cmd[2]; |
c906108c | 2375 | |
c3f6f71d JM |
2376 | cmd[0] = PCKILL; |
2377 | cmd[1] = signo; | |
2378 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2379 | #else /* ioctl method */ | |
2380 | /* FIXME: do I need the Alpha OSF fixups present in | |
0df8b418 | 2381 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
c3f6f71d JM |
2382 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
2383 | #endif | |
2384 | } | |
c906108c | 2385 | |
c3f6f71d JM |
2386 | return win; |
2387 | } | |
c906108c | 2388 | |
77382aee PA |
2389 | /* Find the pid of the process that started this one. Returns the |
2390 | parent process pid, or zero. */ | |
c906108c | 2391 | |
d3581e61 | 2392 | static int |
fba45db2 | 2393 | proc_parent_pid (procinfo *pi) |
c906108c | 2394 | { |
77382aee PA |
2395 | /* We should never have to apply this operation to any procinfo |
2396 | except the one for the main process. If that ever changes for | |
2397 | any reason, then take out the following clause and replace it | |
2398 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2399 | |
c3f6f71d JM |
2400 | if (pi->tid != 0) |
2401 | pi = find_procinfo_or_die (pi->pid, 0); | |
2402 | ||
2403 | if (!pi->status_valid) | |
2404 | if (!proc_get_status (pi)) | |
2405 | return 0; | |
c5aa993b | 2406 | |
c3f6f71d JM |
2407 | return pi->prstatus.pr_ppid; |
2408 | } | |
2409 | ||
9a043c1d AC |
2410 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2411 | (a.k.a void pointer)! */ | |
2412 | ||
1ca8fce0 | 2413 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
05b4bd79 | 2414 | && !(defined (PIOCOPENLWP)) |
9a043c1d AC |
2415 | static void * |
2416 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2417 | { | |
f5656ead | 2418 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
2419 | void *ptr; |
2420 | ||
4e906f53 | 2421 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 2422 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 2423 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
2424 | return ptr; |
2425 | } | |
1ca8fce0 | 2426 | #endif |
9a043c1d | 2427 | |
a0911fd0 | 2428 | static int |
fba45db2 | 2429 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2430 | { |
d1a7880c PA |
2431 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2432 | /* If neither or these is defined, we can't support watchpoints. | |
2433 | This just avoids possibly failing to compile the below on such | |
2434 | systems. */ | |
c3f6f71d JM |
2435 | return 0; |
2436 | #else | |
0df8b418 | 2437 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */ |
05b4bd79 | 2438 | #if defined (PIOCOPENLWP) /* Solaris 2.5: bail out. */ |
c3f6f71d JM |
2439 | return 0; |
2440 | #else | |
2441 | struct { | |
37de36c6 | 2442 | procfs_ctl_t cmd; |
c3f6f71d JM |
2443 | char watch[sizeof (prwatch_t)]; |
2444 | } arg; | |
73930d4d | 2445 | prwatch_t pwatch; |
c3f6f71d | 2446 | |
9a043c1d AC |
2447 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2448 | convert a target address into something that can be stored in a | |
2449 | native data structure. */ | |
831e682e | 2450 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2451 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2452 | #else |
73930d4d | 2453 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2454 | #endif |
73930d4d KH |
2455 | pwatch.pr_size = len; |
2456 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2457 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2458 | arg.cmd = PCWATCH; | |
73930d4d | 2459 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2460 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2461 | #else | |
2462 | #if defined (PIOCSWATCH) | |
73930d4d | 2463 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2464 | #else |
2465 | return 0; /* Fail */ | |
2466 | #endif | |
2467 | #endif | |
2468 | #endif | |
2469 | #endif | |
c906108c SS |
2470 | } |
2471 | ||
965b60ee | 2472 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2473 | |
c3f6f71d | 2474 | #include <sys/sysi86.h> |
c906108c | 2475 | |
77382aee PA |
2476 | /* The KEY is actually the value of the lower 16 bits of the GS |
2477 | register for the LWP that we're interested in. Returns the | |
2478 | matching ssh struct (LDT entry). */ | |
c906108c | 2479 | |
337c776f | 2480 | static struct ssd * |
fba45db2 | 2481 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2482 | { |
c3f6f71d JM |
2483 | static struct ssd *ldt_entry = NULL; |
2484 | #ifdef NEW_PROC_API | |
2485 | char pathname[MAX_PROC_NAME_SIZE]; | |
2486 | struct cleanup *old_chain = NULL; | |
2487 | int fd; | |
2488 | ||
2489 | /* Allocate space for one LDT entry. | |
2490 | This alloc must persist, because we return a pointer to it. */ | |
2491 | if (ldt_entry == NULL) | |
2492 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2493 | ||
2494 | /* Open the file descriptor for the LDT table. */ | |
2495 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2496 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2497 | { |
c3f6f71d JM |
2498 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2499 | return NULL; | |
c906108c | 2500 | } |
0df8b418 | 2501 | /* Make sure it gets closed again! */ |
004527cb | 2502 | old_chain = make_cleanup_close (fd); |
c906108c | 2503 | |
c3f6f71d JM |
2504 | /* Now 'read' thru the table, find a match and return it. */ |
2505 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2506 | { |
c3f6f71d JM |
2507 | if (ldt_entry->sel == 0 && |
2508 | ldt_entry->bo == 0 && | |
2509 | ldt_entry->acc1 == 0 && | |
2510 | ldt_entry->acc2 == 0) | |
2511 | break; /* end of table */ | |
0df8b418 | 2512 | /* If key matches, return this entry. */ |
c3f6f71d JM |
2513 | if (ldt_entry->sel == key) |
2514 | return ldt_entry; | |
c906108c | 2515 | } |
0df8b418 | 2516 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2517 | return NULL; |
2518 | #else | |
2519 | int nldt, i; | |
2520 | static int nalloc = 0; | |
c906108c | 2521 | |
c3f6f71d JM |
2522 | /* Get the number of LDT entries. */ |
2523 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2524 | { |
c3f6f71d JM |
2525 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2526 | return NULL; | |
c906108c SS |
2527 | } |
2528 | ||
0df8b418 MS |
2529 | /* Allocate space for the number of LDT entries. */ |
2530 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
c3f6f71d | 2531 | if (nldt > nalloc) |
c906108c | 2532 | { |
19958708 | 2533 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2534 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2535 | nalloc = nldt; | |
2536 | } | |
19958708 | 2537 | |
c3f6f71d JM |
2538 | /* Read the whole table in one gulp. */ |
2539 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2540 | { | |
2541 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2542 | return NULL; | |
c906108c SS |
2543 | } |
2544 | ||
0df8b418 | 2545 | /* Search the table and return the (first) entry matching 'key'. */ |
c3f6f71d JM |
2546 | for (i = 0; i < nldt; i++) |
2547 | if (ldt_entry[i].sel == key) | |
2548 | return &ldt_entry[i]; | |
c906108c | 2549 | |
0df8b418 | 2550 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2551 | return NULL; |
2552 | #endif | |
2553 | } | |
c906108c | 2554 | |
77382aee | 2555 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2556 | |
2557 | struct ssd * | |
2558 | procfs_find_LDT_entry (ptid_t ptid) | |
2559 | { | |
2560 | gdb_gregset_t *gregs; | |
2561 | int key; | |
2562 | procinfo *pi; | |
2563 | ||
0df8b418 | 2564 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 2565 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 2566 | { |
0b62613e | 2567 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 2568 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
2569 | return NULL; |
2570 | } | |
0df8b418 | 2571 | /* get its general registers. */ |
965b60ee JB |
2572 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2573 | { | |
0b62613e | 2574 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 2575 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
2576 | return NULL; |
2577 | } | |
0df8b418 | 2578 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
2579 | key = (*gregs)[GS] & 0xffff; |
2580 | ||
0df8b418 | 2581 | /* Find the matching entry and return it. */ |
965b60ee JB |
2582 | return proc_get_LDT_entry (pi, key); |
2583 | } | |
2584 | ||
2585 | #endif | |
c906108c | 2586 | |
c3f6f71d | 2587 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2588 | |
c3f6f71d | 2589 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2590 | |
c3f6f71d JM |
2591 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2592 | since there is a different way to do threads on every OS. */ | |
c906108c | 2593 | |
77382aee | 2594 | /* Returns the number of threads for the process. */ |
c906108c | 2595 | |
c3f6f71d | 2596 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2597 | /* OSF version */ |
d3581e61 | 2598 | static int |
fba45db2 | 2599 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2600 | { |
2601 | int nthreads = 0; | |
c906108c | 2602 | |
c3f6f71d JM |
2603 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2604 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2605 | |
c3f6f71d | 2606 | return nthreads; |
c906108c SS |
2607 | } |
2608 | ||
c3f6f71d JM |
2609 | #else |
2610 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
05b4bd79 | 2611 | /* Solaris version */ |
d3581e61 | 2612 | static int |
fba45db2 | 2613 | proc_get_nthreads (procinfo *pi) |
c906108c | 2614 | { |
c3f6f71d JM |
2615 | if (!pi->status_valid) |
2616 | if (!proc_get_status (pi)) | |
2617 | return 0; | |
c5aa993b | 2618 | |
77382aee PA |
2619 | /* NEW_PROC_API: only works for the process procinfo, because the |
2620 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2621 | #ifdef NEW_PROC_API |
0df8b418 | 2622 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 2623 | pi = find_procinfo_or_die (pi->pid, 0); |
c5aa993b | 2624 | #endif |
c3f6f71d | 2625 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2626 | } |
2627 | ||
c3f6f71d | 2628 | #else |
77382aee | 2629 | /* Default version */ |
d3581e61 | 2630 | static int |
fba45db2 | 2631 | proc_get_nthreads (procinfo *pi) |
c906108c | 2632 | { |
c3f6f71d JM |
2633 | return 0; |
2634 | } | |
2635 | #endif | |
2636 | #endif | |
2637 | ||
77382aee PA |
2638 | /* LWP version. |
2639 | ||
2640 | Return the ID of the thread that had an event of interest. | |
2641 | (ie. the one that hit a breakpoint or other traced event). All | |
2642 | other things being equal, this should be the ID of a thread that is | |
2643 | currently executing. */ | |
c3f6f71d JM |
2644 | |
2645 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
05b4bd79 | 2646 | /* Solaris version */ |
d3581e61 | 2647 | static int |
fba45db2 | 2648 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2649 | { |
77382aee PA |
2650 | /* Note: this should be applied to the root procinfo for the |
2651 | process, not to the procinfo for an LWP. If applied to the | |
2652 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2653 | that case, find the parent process procinfo. */ | |
19958708 | 2654 | |
c3f6f71d JM |
2655 | if (pi->tid != 0) |
2656 | pi = find_procinfo_or_die (pi->pid, 0); | |
2657 | ||
2658 | if (!pi->status_valid) | |
2659 | if (!proc_get_status (pi)) | |
2660 | return 0; | |
2661 | ||
2662 | #ifdef NEW_PROC_API | |
2663 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2664 | #else |
c3f6f71d | 2665 | return pi->prstatus.pr_who; |
c906108c | 2666 | #endif |
c3f6f71d | 2667 | } |
c906108c | 2668 | |
c3f6f71d JM |
2669 | #else |
2670 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2671 | /* OSF version */ |
d3581e61 | 2672 | static int |
fba45db2 | 2673 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2674 | { |
0df8b418 | 2675 | #if 0 /* FIXME: not ready for prime time? */ |
c3f6f71d JM |
2676 | return pi->prstatus.pr_tid; |
2677 | #else | |
2678 | return 0; | |
2679 | #endif | |
c906108c SS |
2680 | } |
2681 | ||
c3f6f71d | 2682 | #else |
77382aee | 2683 | /* Default version */ |
d3581e61 | 2684 | static int |
fba45db2 | 2685 | proc_get_current_thread (procinfo *pi) |
c906108c | 2686 | { |
c3f6f71d JM |
2687 | return 0; |
2688 | } | |
2689 | ||
2690 | #endif | |
2691 | #endif | |
c906108c | 2692 | |
77382aee PA |
2693 | /* Discover the IDs of all the threads within the process, and create |
2694 | a procinfo for each of them (chained to the parent). This | |
2695 | unfortunately requires a different method on every OS. Returns | |
2696 | non-zero for success, zero for failure. */ | |
c906108c | 2697 | |
a0911fd0 | 2698 | static int |
fba45db2 | 2699 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2700 | { |
2701 | if (thread && parent) /* sanity */ | |
c906108c | 2702 | { |
c3f6f71d JM |
2703 | thread->status_valid = 0; |
2704 | if (!proc_get_status (thread)) | |
2705 | destroy_one_procinfo (&parent->thread_list, thread); | |
2706 | } | |
2707 | return 0; /* keep iterating */ | |
2708 | } | |
c5aa993b | 2709 | |
c3f6f71d | 2710 | #if defined (PIOCLSTATUS) |
77382aee | 2711 | /* Solaris 2.5 (ioctl) version */ |
d3581e61 | 2712 | static int |
fba45db2 | 2713 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2714 | { |
2715 | gdb_prstatus_t *prstatus; | |
2716 | struct cleanup *old_chain = NULL; | |
2717 | procinfo *thread; | |
2718 | int nlwp, i; | |
2719 | ||
77382aee PA |
2720 | /* We should never have to apply this operation to any procinfo |
2721 | except the one for the main process. If that ever changes for | |
2722 | any reason, then take out the following clause and replace it | |
2723 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2724 | |
c3f6f71d JM |
2725 | if (pi->tid != 0) |
2726 | pi = find_procinfo_or_die (pi->pid, 0); | |
2727 | ||
2728 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2729 | ||
2730 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2731 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2732 | ||
3c37485b | 2733 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2734 | |
b8c9b27d | 2735 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2736 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2737 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2738 | ||
77382aee | 2739 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2740 | for (i = 1; i < nlwp + 1; i++) |
2741 | { | |
2742 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2743 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2744 | |
c3f6f71d JM |
2745 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2746 | thread->status_valid = 1; | |
2747 | } | |
2748 | pi->threads_valid = 1; | |
2749 | do_cleanups (old_chain); | |
2750 | return 1; | |
2751 | } | |
2752 | #else | |
2753 | #ifdef NEW_PROC_API | |
05b4bd79 | 2754 | /* Solaris 6 (and later) version. */ |
004527cb AC |
2755 | static void |
2756 | do_closedir_cleanup (void *dir) | |
2757 | { | |
2758 | closedir (dir); | |
2759 | } | |
2760 | ||
d3581e61 | 2761 | static int |
fba45db2 | 2762 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2763 | { |
2764 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
2765 | struct dirent *direntry; | |
2766 | struct cleanup *old_chain = NULL; | |
2767 | procinfo *thread; | |
2768 | DIR *dirp; | |
2769 | int lwpid; | |
2770 | ||
77382aee PA |
2771 | /* We should never have to apply this operation to any procinfo |
2772 | except the one for the main process. If that ever changes for | |
2773 | any reason, then take out the following clause and replace it | |
2774 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2775 | |
c3f6f71d JM |
2776 | if (pi->tid != 0) |
2777 | pi = find_procinfo_or_die (pi->pid, 0); | |
2778 | ||
2779 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2780 | ||
05b4bd79 PA |
2781 | /* Note: this brute-force method was originally devised for Unixware |
2782 | (support removed since), and will also work on Solaris 2.6 and | |
2783 | 2.7. The original comment mentioned the existence of a much | |
2784 | simpler and more elegant way to do this on Solaris, but didn't | |
2785 | point out what that was. */ | |
c3f6f71d JM |
2786 | |
2787 | strcpy (pathname, pi->pathname); | |
2788 | strcat (pathname, "/lwp"); | |
2789 | if ((dirp = opendir (pathname)) == NULL) | |
2790 | proc_error (pi, "update_threads, opendir", __LINE__); | |
2791 | ||
004527cb | 2792 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
2793 | while ((direntry = readdir (dirp)) != NULL) |
2794 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
2795 | { | |
2796 | lwpid = atoi (&direntry->d_name[0]); | |
2797 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
2798 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
2799 | } | |
2800 | pi->threads_valid = 1; | |
2801 | do_cleanups (old_chain); | |
2802 | return 1; | |
2803 | } | |
2804 | #else | |
2805 | #ifdef PIOCTLIST | |
77382aee | 2806 | /* OSF version */ |
d3581e61 | 2807 | static int |
fba45db2 | 2808 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2809 | { |
2810 | int nthreads, i; | |
2811 | tid_t *threads; | |
2812 | ||
77382aee PA |
2813 | /* We should never have to apply this operation to any procinfo |
2814 | except the one for the main process. If that ever changes for | |
2815 | any reason, then take out the following clause and replace it | |
2816 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2817 | |
c3f6f71d JM |
2818 | if (pi->tid != 0) |
2819 | pi = find_procinfo_or_die (pi->pid, 0); | |
2820 | ||
2821 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2822 | ||
2823 | nthreads = proc_get_nthreads (pi); | |
2824 | if (nthreads < 2) | |
0df8b418 | 2825 | return 0; /* Nothing to do for 1 or fewer threads. */ |
c3f6f71d | 2826 | |
3c37485b | 2827 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 2828 | |
c3f6f71d JM |
2829 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
2830 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
2831 | ||
2832 | for (i = 0; i < nthreads; i++) | |
2833 | { | |
2834 | if (!find_procinfo (pi->pid, threads[i])) | |
2835 | if (!create_procinfo (pi->pid, threads[i])) | |
2836 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 2837 | } |
c3f6f71d JM |
2838 | pi->threads_valid = 1; |
2839 | return 1; | |
c906108c | 2840 | } |
c3f6f71d | 2841 | #else |
77382aee | 2842 | /* Default version */ |
d3581e61 | 2843 | static int |
fba45db2 | 2844 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2845 | { |
2846 | return 0; | |
2847 | } | |
2848 | #endif /* OSF PIOCTLIST */ | |
2849 | #endif /* NEW_PROC_API */ | |
2850 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 2851 | |
77382aee PA |
2852 | /* Given a pointer to a function, call that function once for each lwp |
2853 | in the procinfo list, until the function returns non-zero, in which | |
2854 | event return the value returned by the function. | |
2855 | ||
2856 | Note: this function does NOT call update_threads. If you want to | |
2857 | discover new threads first, you must call that function explicitly. | |
2858 | This function just makes a quick pass over the currently-known | |
2859 | procinfos. | |
2860 | ||
2861 | PI is the parent process procinfo. FUNC is the per-thread | |
2862 | function. PTR is an opaque parameter for function. Returns the | |
2863 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 2864 | |
d3581e61 | 2865 | static int |
d0849a9a KB |
2866 | proc_iterate_over_threads (procinfo *pi, |
2867 | int (*func) (procinfo *, procinfo *, void *), | |
2868 | void *ptr) | |
c906108c | 2869 | { |
c3f6f71d JM |
2870 | procinfo *thread, *next; |
2871 | int retval = 0; | |
c906108c | 2872 | |
77382aee PA |
2873 | /* We should never have to apply this operation to any procinfo |
2874 | except the one for the main process. If that ever changes for | |
2875 | any reason, then take out the following clause and replace it | |
2876 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2877 | |
c3f6f71d JM |
2878 | if (pi->tid != 0) |
2879 | pi = find_procinfo_or_die (pi->pid, 0); | |
2880 | ||
2881 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 2882 | { |
0df8b418 | 2883 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
2884 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
2885 | break; | |
c906108c | 2886 | } |
c3f6f71d JM |
2887 | |
2888 | return retval; | |
c906108c SS |
2889 | } |
2890 | ||
c3f6f71d JM |
2891 | /* =================== END, Thread "MODULE" =================== */ |
2892 | ||
2893 | /* =================== END, /proc "MODULE" =================== */ | |
2894 | ||
2895 | /* =================== GDB "MODULE" =================== */ | |
2896 | ||
77382aee PA |
2897 | /* Here are all of the gdb target vector functions and their |
2898 | friends. */ | |
c3f6f71d | 2899 | |
39f77062 | 2900 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 2901 | static void do_detach (int signo); |
9185ddce | 2902 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 2903 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
2904 | |
2905 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
2906 | the startup phase. The following two variables are used to record | |
2907 | the address of the breakpoint, and the code that was replaced by | |
2908 | a breakpoint. */ | |
2909 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 2910 | static void *dbx_link_bpt; |
c3f6f71d | 2911 | |
77382aee PA |
2912 | /* Sets up the inferior to be debugged. Registers to trace signals, |
2913 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
2914 | may want to customize that. Returns zero for success (note! | |
2915 | unlike most functions in this module); on failure, returns the LINE | |
2916 | NUMBER where it failed! */ | |
c3f6f71d JM |
2917 | |
2918 | static int | |
fba45db2 | 2919 | procfs_debug_inferior (procinfo *pi) |
c906108c | 2920 | { |
c3f6f71d | 2921 | fltset_t traced_faults; |
37de36c6 KB |
2922 | gdb_sigset_t traced_signals; |
2923 | sysset_t *traced_syscall_entries; | |
2924 | sysset_t *traced_syscall_exits; | |
2925 | int status; | |
c906108c | 2926 | |
c3f6f71d JM |
2927 | #ifdef PROCFS_DONT_TRACE_FAULTS |
2928 | /* On some systems (OSF), we don't trace hardware faults. | |
2929 | Apparently it's enough that we catch them as signals. | |
0df8b418 MS |
2930 | Wonder why we don't just do that in general? */ |
2931 | premptyset (&traced_faults); /* don't trace faults. */ | |
c3f6f71d | 2932 | #else |
0df8b418 MS |
2933 | /* Register to trace hardware faults in the child. */ |
2934 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 2935 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
2936 | #endif |
2937 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
2938 | return __LINE__; | |
c906108c | 2939 | |
2455069d UW |
2940 | /* Initially, register to trace all signals in the child. */ |
2941 | prfillset (&traced_signals); | |
2942 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
2943 | return __LINE__; |
2944 | ||
37de36c6 | 2945 | |
c3f6f71d | 2946 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
2947 | traced_syscall_entries = sysset_t_alloc (pi); |
2948 | gdb_premptysysset (traced_syscall_entries); | |
2949 | #ifdef SYS_exit | |
2950 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
2951 | #endif | |
c3f6f71d | 2952 | #ifdef SYS_lwpexit |
0df8b418 | 2953 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */ |
c3f6f71d JM |
2954 | #endif |
2955 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
2956 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
2957 | #endif | |
2958 | #ifdef DYNAMIC_SYSCALLS | |
2959 | { | |
2960 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 2961 | |
37de36c6 KB |
2962 | if (callnum >= 0) |
2963 | gdb_praddsysset (traced_syscall_entries, callnum); | |
2964 | } | |
c906108c SS |
2965 | #endif |
2966 | ||
37de36c6 KB |
2967 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
2968 | xfree (traced_syscall_entries); | |
2969 | if (!status) | |
c3f6f71d JM |
2970 | return __LINE__; |
2971 | ||
2972 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
2973 | /* OSF method for tracing exec syscalls. Quoting: | |
2974 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
2975 | exits from exec system calls because of the user level loader. */ | |
0df8b418 | 2976 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
2977 | { |
2978 | int prfs_flags; | |
2979 | ||
2980 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
2981 | return __LINE__; | |
2982 | ||
2983 | prfs_flags |= PRFS_STOPEXEC; | |
2984 | ||
2985 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
2986 | return __LINE__; | |
2987 | } | |
2988 | #else /* not PRFS_STOPEXEC */ | |
0df8b418 | 2989 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
2990 | /* GW: Rationale... |
2991 | Not all systems with /proc have all the exec* syscalls with the same | |
2992 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 2993 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 2994 | |
37de36c6 KB |
2995 | traced_syscall_exits = sysset_t_alloc (pi); |
2996 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 2997 | #ifdef SYS_exec |
37de36c6 | 2998 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
2999 | #endif |
3000 | #ifdef SYS_execve | |
37de36c6 | 3001 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3002 | #endif |
3003 | #ifdef SYS_execv | |
37de36c6 | 3004 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3005 | #endif |
c5aa993b | 3006 | |
c3f6f71d | 3007 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3008 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3009 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3010 | #endif |
c5aa993b | 3011 | |
0df8b418 | 3012 | #ifdef SYS_lwp_create /* FIXME: once only, please. */ |
37de36c6 KB |
3013 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3014 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3015 | #endif |
c5aa993b | 3016 | |
37de36c6 KB |
3017 | #ifdef DYNAMIC_SYSCALLS |
3018 | { | |
3019 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3020 | |
37de36c6 KB |
3021 | if (callnum >= 0) |
3022 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3023 | callnum = find_syscall (pi, "ra_execve"); | |
3024 | if (callnum >= 0) | |
3025 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3026 | } | |
3027 | #endif | |
c906108c | 3028 | |
37de36c6 KB |
3029 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3030 | xfree (traced_syscall_exits); | |
3031 | if (!status) | |
c3f6f71d JM |
3032 | return __LINE__; |
3033 | ||
3034 | #endif /* PRFS_STOPEXEC */ | |
3035 | return 0; | |
c906108c SS |
3036 | } |
3037 | ||
19958708 | 3038 | static void |
c0939df1 | 3039 | procfs_attach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 3040 | { |
c3f6f71d JM |
3041 | char *exec_file; |
3042 | int pid; | |
3043 | ||
74164c56 | 3044 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3045 | |
c3f6f71d | 3046 | if (pid == getpid ()) |
8a3fe4f8 | 3047 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3048 | |
c3f6f71d | 3049 | if (from_tty) |
c906108c | 3050 | { |
c3f6f71d JM |
3051 | exec_file = get_exec_file (0); |
3052 | ||
3053 | if (exec_file) | |
a3f17187 | 3054 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3055 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3056 | else |
a3f17187 | 3057 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3058 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3059 | |
3060 | fflush (stdout); | |
c906108c | 3061 | } |
39f77062 | 3062 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
6a3cb8e8 PA |
3063 | if (!target_is_pushed (ops)) |
3064 | push_target (ops); | |
c3f6f71d JM |
3065 | } |
3066 | ||
19958708 | 3067 | static void |
52554a0e | 3068 | procfs_detach (struct target_ops *ops, const char *args, int from_tty) |
c3f6f71d | 3069 | { |
cc377e6b | 3070 | int sig = 0; |
dfd4cc63 | 3071 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b MK |
3072 | |
3073 | if (args) | |
3074 | sig = atoi (args); | |
c3f6f71d JM |
3075 | |
3076 | if (from_tty) | |
c906108c | 3077 | { |
cc377e6b MK |
3078 | char *exec_file; |
3079 | ||
c3f6f71d | 3080 | exec_file = get_exec_file (0); |
cc377e6b | 3081 | if (exec_file == NULL) |
c3f6f71d | 3082 | exec_file = ""; |
cc377e6b | 3083 | |
a3f17187 | 3084 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3085 | target_pid_to_str (pid_to_ptid (pid))); |
3086 | gdb_flush (gdb_stdout); | |
c906108c | 3087 | } |
19958708 | 3088 | |
cc377e6b MK |
3089 | do_detach (sig); |
3090 | ||
39f77062 | 3091 | inferior_ptid = null_ptid; |
7f9f62ba | 3092 | detach_inferior (pid); |
6a3cb8e8 | 3093 | inf_child_maybe_unpush_target (ops); |
c906108c SS |
3094 | } |
3095 | ||
39f77062 KB |
3096 | static ptid_t |
3097 | do_attach (ptid_t ptid) | |
c906108c | 3098 | { |
c3f6f71d | 3099 | procinfo *pi; |
181e7f93 | 3100 | struct inferior *inf; |
c3f6f71d | 3101 | int fail; |
2689673f | 3102 | int lwpid; |
c3f6f71d | 3103 | |
dfd4cc63 | 3104 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 3105 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3106 | |
3107 | if (!open_procinfo_files (pi, FD_CTL)) | |
3108 | { | |
3109 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3110 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 3111 | ptid_get_pid (ptid)); |
c3f6f71d JM |
3112 | dead_procinfo (pi, errmsg, NOKILL); |
3113 | } | |
c906108c | 3114 | |
c3f6f71d JM |
3115 | /* Stop the process (if it isn't already stopped). */ |
3116 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3117 | { |
c3f6f71d JM |
3118 | pi->was_stopped = 1; |
3119 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3120 | } |
3121 | else | |
3122 | { | |
c3f6f71d JM |
3123 | pi->was_stopped = 0; |
3124 | /* Set the process to run again when we close it. */ | |
3125 | if (!proc_set_run_on_last_close (pi)) | |
3126 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3127 | ||
0df8b418 | 3128 | /* Now stop the process. */ |
c3f6f71d JM |
3129 | if (!proc_stop_process (pi)) |
3130 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3131 | pi->ignore_next_sigstop = 1; | |
c906108c | 3132 | } |
c3f6f71d JM |
3133 | /* Save some of the /proc state to be restored if we detach. */ |
3134 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3135 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3136 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3137 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3138 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3139 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3140 | NOKILL); | |
37de36c6 | 3141 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3142 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3143 | NOKILL); |
3144 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3145 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3146 | ||
3147 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3148 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3149 | ||
6c95b8df PA |
3150 | inf = current_inferior (); |
3151 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3152 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3153 | inf->attach_flag = 1; |
2689673f PA |
3154 | |
3155 | /* Create a procinfo for the current lwp. */ | |
3156 | lwpid = proc_get_current_thread (pi); | |
3157 | create_procinfo (pi->pid, lwpid); | |
3158 | ||
3159 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 3160 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
3161 | add_thread (ptid); |
3162 | ||
3163 | return ptid; | |
c906108c SS |
3164 | } |
3165 | ||
3166 | static void | |
fba45db2 | 3167 | do_detach (int signo) |
c906108c | 3168 | { |
c3f6f71d | 3169 | procinfo *pi; |
c906108c | 3170 | |
0df8b418 | 3171 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
3172 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
3173 | 0); /* FIXME: threads */ | |
c3f6f71d JM |
3174 | if (signo) |
3175 | if (!proc_set_current_signal (pi, signo)) | |
3176 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3177 | |
c3f6f71d JM |
3178 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3179 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3180 | |
c3f6f71d JM |
3181 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3182 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3183 | ||
37de36c6 | 3184 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3185 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3186 | ||
37de36c6 | 3187 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3188 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3189 | ||
3190 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3191 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3192 | ||
3193 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3194 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3195 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3196 | { |
3197 | /* Clear any pending signal. */ | |
3198 | if (!proc_clear_current_fault (pi)) | |
3199 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3200 | ||
1a303dec MS |
3201 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3202 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3203 | ||
c3f6f71d JM |
3204 | if (!proc_set_run_on_last_close (pi)) |
3205 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3206 | } | |
3207 | ||
c3f6f71d | 3208 | destroy_procinfo (pi); |
c906108c SS |
3209 | } |
3210 | ||
772cf8be MK |
3211 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3212 | for all registers. | |
3213 | ||
3214 | ??? Is the following note still relevant? We can't get individual | |
3215 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3216 | don't bother with caching at all in that case. | |
3217 | ||
3218 | NOTE: Since the /proc interface cannot give us individual | |
3219 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3220 | This results in the possibility that we will do unnecessarily many | |
3221 | fetches, since we may be called repeatedly for individual | |
3222 | registers. So we cache the results, and mark the cache invalid | |
3223 | when the process is resumed. */ | |
c3f6f71d | 3224 | |
c906108c | 3225 | static void |
28439f5e PA |
3226 | procfs_fetch_registers (struct target_ops *ops, |
3227 | struct regcache *regcache, int regnum) | |
c906108c | 3228 | { |
772cf8be MK |
3229 | gdb_gregset_t *gregs; |
3230 | procinfo *pi; | |
dfd4cc63 LM |
3231 | int pid = ptid_get_pid (inferior_ptid); |
3232 | int tid = ptid_get_lwp (inferior_ptid); | |
40a6adc1 | 3233 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3234 | |
2689673f | 3235 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3236 | |
3237 | if (pi == NULL) | |
8a3fe4f8 | 3238 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3239 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3240 | |
772cf8be MK |
3241 | gregs = proc_get_gregs (pi); |
3242 | if (gregs == NULL) | |
c3f6f71d JM |
3243 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3244 | ||
56be3814 | 3245 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3246 | |
40a6adc1 | 3247 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3248 | { |
772cf8be MK |
3249 | gdb_fpregset_t *fpregs; |
3250 | ||
40a6adc1 MD |
3251 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3252 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3253 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3254 | return; /* Not a floating point register. */ |
c5aa993b | 3255 | |
772cf8be MK |
3256 | fpregs = proc_get_fpregs (pi); |
3257 | if (fpregs == NULL) | |
60054393 | 3258 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3259 | |
56be3814 | 3260 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3261 | } |
c906108c SS |
3262 | } |
3263 | ||
772cf8be MK |
3264 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3265 | this for all registers. | |
3266 | ||
3267 | NOTE: Since the /proc interface will not read individual registers, | |
3268 | we will cache these requests until the process is resumed, and only | |
3269 | then write them back to the inferior process. | |
77382aee | 3270 | |
772cf8be MK |
3271 | FIXME: is that a really bad idea? Have to think about cases where |
3272 | writing one register might affect the value of others, etc. */ | |
c906108c | 3273 | |
c3f6f71d | 3274 | static void |
28439f5e PA |
3275 | procfs_store_registers (struct target_ops *ops, |
3276 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3277 | { |
772cf8be MK |
3278 | gdb_gregset_t *gregs; |
3279 | procinfo *pi; | |
dfd4cc63 LM |
3280 | int pid = ptid_get_pid (inferior_ptid); |
3281 | int tid = ptid_get_lwp (inferior_ptid); | |
40a6adc1 | 3282 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3283 | |
2689673f | 3284 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3285 | |
3286 | if (pi == NULL) | |
8a3fe4f8 | 3287 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3288 | target_pid_to_str (inferior_ptid)); |
c906108c | 3289 | |
772cf8be MK |
3290 | gregs = proc_get_gregs (pi); |
3291 | if (gregs == NULL) | |
c3f6f71d | 3292 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3293 | |
56be3814 | 3294 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3295 | if (!proc_set_gregs (pi)) |
3296 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3297 | |
40a6adc1 | 3298 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3299 | { |
772cf8be MK |
3300 | gdb_fpregset_t *fpregs; |
3301 | ||
40a6adc1 MD |
3302 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3303 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3304 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3305 | return; /* Not a floating point register. */ |
60054393 | 3306 | |
772cf8be MK |
3307 | fpregs = proc_get_fpregs (pi); |
3308 | if (fpregs == NULL) | |
60054393 MS |
3309 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3310 | ||
56be3814 | 3311 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3312 | if (!proc_set_fpregs (pi)) |
3313 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3314 | } | |
c3f6f71d | 3315 | } |
c906108c | 3316 | |
37de36c6 KB |
3317 | static int |
3318 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3319 | { | |
37de36c6 KB |
3320 | #ifdef SYS_lwp_exit |
3321 | if (scall == SYS_lwp_exit) | |
3322 | return 1; | |
3323 | #endif | |
3324 | #ifdef SYS_lwpexit | |
3325 | if (scall == SYS_lwpexit) | |
3326 | return 1; | |
3327 | #endif | |
3328 | return 0; | |
3329 | } | |
3330 | ||
3331 | static int | |
3332 | syscall_is_exit (procinfo *pi, int scall) | |
3333 | { | |
3334 | #ifdef SYS_exit | |
3335 | if (scall == SYS_exit) | |
3336 | return 1; | |
3337 | #endif | |
3338 | #ifdef DYNAMIC_SYSCALLS | |
3339 | if (find_syscall (pi, "_exit") == scall) | |
3340 | return 1; | |
3341 | #endif | |
3342 | return 0; | |
3343 | } | |
3344 | ||
3345 | static int | |
3346 | syscall_is_exec (procinfo *pi, int scall) | |
3347 | { | |
3348 | #ifdef SYS_exec | |
3349 | if (scall == SYS_exec) | |
3350 | return 1; | |
3351 | #endif | |
3352 | #ifdef SYS_execv | |
3353 | if (scall == SYS_execv) | |
3354 | return 1; | |
3355 | #endif | |
3356 | #ifdef SYS_execve | |
3357 | if (scall == SYS_execve) | |
3358 | return 1; | |
3359 | #endif | |
3360 | #ifdef DYNAMIC_SYSCALLS | |
3361 | if (find_syscall (pi, "_execve")) | |
3362 | return 1; | |
3363 | if (find_syscall (pi, "ra_execve")) | |
3364 | return 1; | |
3365 | #endif | |
3366 | return 0; | |
3367 | } | |
3368 | ||
3369 | static int | |
3370 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3371 | { | |
3372 | #ifdef SYS_lwp_create | |
3373 | if (scall == SYS_lwp_create) | |
3374 | return 1; | |
3375 | #endif | |
3376 | #ifdef SYS_lwpcreate | |
3377 | if (scall == SYS_lwpcreate) | |
3378 | return 1; | |
3379 | #endif | |
3380 | return 0; | |
3381 | } | |
3382 | ||
7434dadd JB |
3383 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3384 | Does nothing if the breakpoint hasn't been inserted or has already | |
3385 | been removed. */ | |
3386 | ||
3387 | static void | |
3388 | remove_dbx_link_breakpoint (void) | |
3389 | { | |
3390 | if (dbx_link_bpt_addr == 0) | |
3391 | return; | |
3392 | ||
f5656ead | 3393 | if (deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt) != 0) |
7434dadd JB |
3394 | warning (_("Unable to remove __dbx_link breakpoint.")); |
3395 | ||
3396 | dbx_link_bpt_addr = 0; | |
3397 | dbx_link_bpt = NULL; | |
3398 | } | |
3399 | ||
3400 | #ifdef SYS_syssgi | |
3401 | /* Return the address of the __dbx_link() function in the file | |
3402 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3403 | the symbol was not found. */ | |
3404 | ||
3405 | static CORE_ADDR | |
3406 | dbx_link_addr (bfd *abfd) | |
3407 | { | |
3408 | long storage_needed; | |
3409 | asymbol **symbol_table; | |
3410 | long number_of_symbols; | |
3411 | long i; | |
3412 | ||
3413 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3414 | if (storage_needed <= 0) | |
3415 | return 0; | |
3416 | ||
3417 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3418 | make_cleanup (xfree, symbol_table); | |
3419 | ||
3420 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3421 | ||
3422 | for (i = 0; i < number_of_symbols; i++) | |
3423 | { | |
3424 | asymbol *sym = symbol_table[i]; | |
3425 | ||
3426 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3427 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3428 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3429 | } |
3430 | ||
3431 | /* Symbol not found, return NULL. */ | |
3432 | return 0; | |
3433 | } | |
3434 | ||
3435 | /* Search the symbol table of the file referenced by FD for a symbol | |
0df8b418 | 3436 | named __dbx_link(). If found, then insert a breakpoint at this location, |
7434dadd JB |
3437 | and return nonzero. Return zero otherwise. */ |
3438 | ||
3439 | static int | |
3440 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3441 | { | |
3442 | bfd *abfd; | |
3443 | long storage_needed; | |
3444 | CORE_ADDR sym_addr; | |
3445 | ||
64c31149 | 3446 | abfd = gdb_bfd_fdopenr ("unamed", 0, fd); |
7434dadd JB |
3447 | if (abfd == NULL) |
3448 | { | |
3449 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3450 | return 0; | |
3451 | } | |
3452 | ||
3453 | if (!bfd_check_format (abfd, bfd_object)) | |
3454 | { | |
3455 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3456 | symbol in it. */ |
cbb099e8 | 3457 | gdb_bfd_unref (abfd); |
7434dadd JB |
3458 | return 0; |
3459 | } | |
3460 | ||
3461 | sym_addr = dbx_link_addr (abfd); | |
3462 | if (sym_addr != 0) | |
3463 | { | |
3464 | /* Insert the breakpoint. */ | |
3465 | dbx_link_bpt_addr = sym_addr; | |
f5656ead | 3466 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch (), NULL, |
7434dadd JB |
3467 | sym_addr); |
3468 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3469 | { |
3470 | warning (_("Failed to insert dbx_link breakpoint.")); | |
cbb099e8 | 3471 | gdb_bfd_unref (abfd); |
77382aee PA |
3472 | return 0; |
3473 | } | |
cbb099e8 | 3474 | gdb_bfd_unref (abfd); |
7434dadd JB |
3475 | return 1; |
3476 | } | |
3477 | ||
cbb099e8 | 3478 | gdb_bfd_unref (abfd); |
7434dadd JB |
3479 | return 0; |
3480 | } | |
3481 | ||
e294797a | 3482 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3483 | space in the process. The callback function receives an open file |
3484 | descriptor for the file corresponding to that mapped address space | |
3485 | (if there is one), and the base address of the mapped space. Quit | |
3486 | when the callback function returns a nonzero value, or at teh end | |
3487 | of the mappings. Returns the first non-zero return value of the | |
3488 | callback function, or zero. */ | |
e294797a JB |
3489 | |
3490 | static int | |
3491 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3492 | void *data) | |
3493 | { | |
3494 | procinfo *pi = data; | |
3495 | int fd; | |
3496 | ||
3497 | #ifdef NEW_PROC_API | |
3498 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3499 | ||
3500 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3501 | return -1; /* sanity */ | |
3502 | ||
3503 | if (map->pr_mapname[0] == 0) | |
3504 | { | |
3505 | fd = -1; /* no map file */ | |
3506 | } | |
3507 | else | |
3508 | { | |
3509 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3510 | /* Note: caller's responsibility to close this fd! */ | |
3511 | fd = open_with_retry (name, O_RDONLY); | |
3512 | /* Note: we don't test the above call for failure; | |
3513 | we just pass the FD on as given. Sometimes there is | |
3514 | no file, so the open may return failure, but that's | |
3515 | not a problem. */ | |
3516 | } | |
3517 | #else | |
3518 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3519 | /* Note: we don't test the above call for failure; | |
3520 | we just pass the FD on as given. Sometimes there is | |
3521 | no file, so the ioctl may return failure, but that's | |
3522 | not a problem. */ | |
3523 | #endif | |
3524 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3525 | } | |
3526 | ||
7434dadd JB |
3527 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3528 | insert a breakpoint at this location and return nonzero. Return | |
3529 | zero otherwise. */ | |
3530 | ||
3531 | static int | |
3532 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
b8edc417 | 3533 | find_memory_region_ftype child_func, |
77382aee | 3534 | void *data) |
7434dadd JB |
3535 | { |
3536 | procinfo *pi = (procinfo *) data; | |
3537 | ||
3538 | /* We know the symbol we're looking for is in a text region, so | |
3539 | only look for it if the region is a text one. */ | |
3540 | if (map->pr_mflags & MA_EXEC) | |
3541 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3542 | ||
3543 | return 0; | |
3544 | } | |
3545 | ||
3546 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3547 | insert a breakpoint at its location, and return nonzero. Return zero | |
3548 | otherwise. */ | |
3549 | ||
3550 | static int | |
3551 | insert_dbx_link_breakpoint (procinfo *pi) | |
3552 | { | |
3553 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3554 | } | |
3555 | #endif | |
3556 | ||
77382aee PA |
3557 | /* Retrieve the next stop event from the child process. If child has |
3558 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3559 | (or possibly wait eventcodes) into gdb internal event codes. | |
3560 | Returns the id of process (and possibly thread) that incurred the | |
3561 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3562 | |
39f77062 | 3563 | static ptid_t |
117de6a9 | 3564 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3565 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3566 | { |
0df8b418 | 3567 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 3568 | procinfo *pi; |
39f77062 KB |
3569 | int wstat; |
3570 | int temp_tid; | |
3571 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3572 | int why, what, flags; |
3573 | int retry = 0; | |
c906108c | 3574 | |
c3f6f71d | 3575 | wait_again: |
c906108c | 3576 | |
c3f6f71d JM |
3577 | retry++; |
3578 | wstat = 0; | |
39f77062 | 3579 | retval = pid_to_ptid (-1); |
c906108c | 3580 | |
0df8b418 | 3581 | /* Find procinfo for main process. */ |
dfd4cc63 | 3582 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 3583 | if (pi) |
c906108c | 3584 | { |
0df8b418 | 3585 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
3586 | pi->status_valid = 0; |
3587 | pi->gregs_valid = 0; | |
3588 | pi->fpregs_valid = 0; | |
3589 | ||
0df8b418 | 3590 | #if 0 /* just try this out... */ |
c3f6f71d JM |
3591 | flags = proc_flags (pi); |
3592 | why = proc_why (pi); | |
3593 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 3594 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
3595 | #endif |
3596 | /* If child is not stopped, wait for it to stop. */ | |
3597 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3598 | !proc_wait_for_stop (pi)) | |
c906108c | 3599 | { |
0df8b418 | 3600 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 3601 | if (errno == ENOENT) |
c906108c | 3602 | { |
39f77062 KB |
3603 | int wait_retval; |
3604 | ||
0df8b418 MS |
3605 | /* /proc file not found; presumably child has terminated. */ |
3606 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 3607 | |
dfd4cc63 LM |
3608 | /* Wrong child? */ |
3609 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
3610 | error (_("procfs: couldn't stop " |
3611 | "process %d: wait returned %d."), | |
dfd4cc63 | 3612 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 3613 | /* FIXME: might I not just use waitpid? |
0df8b418 | 3614 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 3615 | retval = pid_to_ptid (wait_retval); |
c906108c | 3616 | } |
d1566ff5 FN |
3617 | else if (errno == EINTR) |
3618 | goto wait_again; | |
c3f6f71d | 3619 | else |
c906108c | 3620 | { |
0df8b418 | 3621 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 3622 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 3623 | } |
c3f6f71d JM |
3624 | } |
3625 | else | |
3626 | { | |
3627 | /* This long block is reached if either: | |
3628 | a) the child was already stopped, or | |
3629 | b) we successfully waited for the child with wait_for_stop. | |
3630 | This block will analyze the /proc status, and translate it | |
3631 | into a waitstatus for GDB. | |
3632 | ||
3633 | If we actually had to call wait because the /proc file | |
19958708 | 3634 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3635 | because we already have a waitstatus. */ |
3636 | ||
3637 | flags = proc_flags (pi); | |
3638 | why = proc_why (pi); | |
3639 | what = proc_what (pi); | |
3640 | ||
c3f6f71d | 3641 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3642 | { |
c3f6f71d JM |
3643 | #ifdef PR_ASYNC |
3644 | /* If it's running async (for single_thread control), | |
3645 | set it back to normal again. */ | |
3646 | if (flags & PR_ASYNC) | |
3647 | if (!proc_unset_async (pi)) | |
3648 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3649 | #endif | |
3650 | ||
3651 | if (info_verbose) | |
3652 | proc_prettyprint_why (why, what, 1); | |
3653 | ||
3654 | /* The 'pid' we will return to GDB is composed of | |
3655 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 3656 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
3657 | |
3658 | switch (why) { | |
3659 | case PR_SIGNALLED: | |
3660 | wstat = (what << 8) | 0177; | |
3661 | break; | |
3662 | case PR_SYSENTRY: | |
37de36c6 | 3663 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3664 | { |
17faa917 DJ |
3665 | if (print_thread_events) |
3666 | printf_unfiltered (_("[%s exited]\n"), | |
3667 | target_pid_to_str (retval)); | |
37de36c6 KB |
3668 | delete_thread (retval); |
3669 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3670 | return retval; | |
3671 | } | |
3672 | else if (syscall_is_exit (pi, what)) | |
3673 | { | |
181e7f93 PA |
3674 | struct inferior *inf; |
3675 | ||
0df8b418 | 3676 | /* Handle SYS_exit call only. */ |
37de36c6 | 3677 | /* Stopped at entry to SYS_exit. |
19958708 | 3678 | Make it runnable, resume it, then use |
37de36c6 | 3679 | the wait system call to get its exit code. |
19958708 | 3680 | Proc_run_process always clears the current |
37de36c6 KB |
3681 | fault and signal. |
3682 | Then return its exit status. */ | |
3683 | pi->status_valid = 0; | |
3684 | wstat = 0; | |
19958708 | 3685 | /* FIXME: what we should do is return |
37de36c6 KB |
3686 | TARGET_WAITKIND_SPURIOUS. */ |
3687 | if (!proc_run_process (pi, 0, 0)) | |
3688 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3689 | |
3690 | inf = find_inferior_pid (pi->pid); | |
3691 | if (inf->attach_flag) | |
c3f6f71d | 3692 | { |
19958708 | 3693 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3694 | return a "success" exit code. Bogus: what if |
3695 | it returns something else? */ | |
3696 | wstat = 0; | |
39f77062 | 3697 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3698 | } |
3699 | else | |
3700 | { | |
3701 | int temp = wait (&wstat); | |
3702 | ||
3703 | /* FIXME: shouldn't I make sure I get the right | |
3704 | event from the right process? If (for | |
3705 | instance) I have killed an earlier inferior | |
3706 | process but failed to clean up after it | |
3707 | somehow, I could get its termination event | |
3708 | here. */ | |
3709 | ||
0df8b418 MS |
3710 | /* If wait returns -1, that's what we return |
3711 | to GDB. */ | |
37de36c6 | 3712 | if (temp < 0) |
39f77062 | 3713 | retval = pid_to_ptid (temp); |
c3f6f71d | 3714 | } |
c3f6f71d | 3715 | } |
37de36c6 KB |
3716 | else |
3717 | { | |
a3f17187 | 3718 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3719 | proc_prettyprint_syscall (proc_what (pi), 0); |
3720 | printf_filtered ("\n"); | |
3721 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3722 | { |
37de36c6 | 3723 | long i, nsysargs, *sysargs; |
c3f6f71d | 3724 | |
37de36c6 KB |
3725 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3726 | (sysargs = proc_sysargs (pi)) != NULL) | |
3727 | { | |
3e43a32a MS |
3728 | printf_filtered (_("%ld syscall arguments:\n"), |
3729 | nsysargs); | |
37de36c6 | 3730 | for (i = 0; i < nsysargs; i++) |
19958708 | 3731 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3732 | i, sysargs[i]); |
3733 | } | |
c3f6f71d | 3734 | |
c3f6f71d | 3735 | } |
c3f6f71d | 3736 | #endif |
37de36c6 KB |
3737 | if (status) |
3738 | { | |
0df8b418 MS |
3739 | /* How to exit gracefully, returning "unknown |
3740 | event". */ | |
37de36c6 | 3741 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3742 | return inferior_ptid; |
37de36c6 KB |
3743 | } |
3744 | else | |
3745 | { | |
3746 | /* How to keep going without returning to wfi: */ | |
a493e3e2 | 3747 | target_resume (ptid, 0, GDB_SIGNAL_0); |
37de36c6 KB |
3748 | goto wait_again; |
3749 | } | |
3750 | } | |
3751 | break; | |
3752 | case PR_SYSEXIT: | |
3753 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 3754 | { |
37de36c6 KB |
3755 | /* Hopefully this is our own "fork-child" execing |
3756 | the real child. Hoax this event into a trap, and | |
3757 | GDB will see the child about to execute its start | |
0df8b418 | 3758 | address. */ |
37de36c6 KB |
3759 | wstat = (SIGTRAP << 8) | 0177; |
3760 | } | |
9185ddce | 3761 | #ifdef SYS_syssgi |
77382aee PA |
3762 | else if (what == SYS_syssgi) |
3763 | { | |
3764 | /* see if we can break on dbx_link(). If yes, then | |
3765 | we no longer need the SYS_syssgi notifications. */ | |
3766 | if (insert_dbx_link_breakpoint (pi)) | |
3767 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
3768 | FLAG_RESET, 0); | |
3769 | ||
3770 | /* This is an internal event and should be transparent | |
3771 | to wfi, so resume the execution and wait again. See | |
3772 | comment in procfs_init_inferior() for more details. */ | |
a493e3e2 | 3773 | target_resume (ptid, 0, GDB_SIGNAL_0); |
77382aee PA |
3774 | goto wait_again; |
3775 | } | |
9185ddce | 3776 | #endif |
37de36c6 KB |
3777 | else if (syscall_is_lwp_create (pi, what)) |
3778 | { | |
77382aee PA |
3779 | /* This syscall is somewhat like fork/exec. We |
3780 | will get the event twice: once for the parent | |
3781 | LWP, and once for the child. We should already | |
3782 | know about the parent LWP, but the child will | |
3783 | be new to us. So, whenever we get this event, | |
3784 | if it represents a new thread, simply add the | |
3785 | thread to the list. */ | |
c3f6f71d | 3786 | |
37de36c6 | 3787 | /* If not in procinfo list, add it. */ |
39f77062 KB |
3788 | temp_tid = proc_get_current_thread (pi); |
3789 | if (!find_procinfo (pi->pid, temp_tid)) | |
3790 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 3791 | |
dfd4cc63 | 3792 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 3793 | /* If not in GDB's thread list, add it. */ |
39f77062 | 3794 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
3795 | add_thread (temp_ptid); |
3796 | ||
0df8b418 | 3797 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 3798 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3799 | return inferior_ptid; |
37de36c6 KB |
3800 | } |
3801 | else if (syscall_is_lwp_exit (pi, what)) | |
3802 | { | |
17faa917 DJ |
3803 | if (print_thread_events) |
3804 | printf_unfiltered (_("[%s exited]\n"), | |
3805 | target_pid_to_str (retval)); | |
37de36c6 KB |
3806 | delete_thread (retval); |
3807 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3808 | return retval; | |
c3f6f71d | 3809 | } |
37de36c6 KB |
3810 | else if (0) |
3811 | { | |
3812 | /* FIXME: Do we need to handle SYS_sproc, | |
3813 | SYS_fork, or SYS_vfork here? The old procfs | |
3814 | seemed to use this event to handle threads on | |
3815 | older (non-LWP) systems, where I'm assuming | |
19958708 | 3816 | that threads were actually separate processes. |
37de36c6 KB |
3817 | Irix, maybe? Anyway, low priority for now. */ |
3818 | } | |
3819 | else | |
3820 | { | |
a3f17187 | 3821 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
3822 | proc_prettyprint_syscall (proc_what (pi), 0); |
3823 | printf_filtered ("\n"); | |
3824 | #ifndef PIOCSSPCACT | |
3825 | { | |
3826 | long i, nsysargs, *sysargs; | |
3827 | ||
3828 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3829 | (sysargs = proc_sysargs (pi)) != NULL) | |
3830 | { | |
77382aee PA |
3831 | printf_filtered (_("%ld syscall arguments:\n"), |
3832 | nsysargs); | |
37de36c6 | 3833 | for (i = 0; i < nsysargs; i++) |
19958708 | 3834 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3835 | i, sysargs[i]); |
3836 | } | |
3837 | } | |
c3f6f71d | 3838 | #endif |
37de36c6 | 3839 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3840 | return inferior_ptid; |
37de36c6 | 3841 | } |
c3f6f71d JM |
3842 | break; |
3843 | case PR_REQUESTED: | |
3844 | #if 0 /* FIXME */ | |
3845 | wstat = (SIGSTOP << 8) | 0177; | |
3846 | break; | |
3847 | #else | |
3848 | if (retry < 5) | |
3849 | { | |
a3f17187 | 3850 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
3851 | pi->status_valid = 0; |
3852 | goto wait_again; | |
3853 | } | |
3854 | else | |
3855 | { | |
3856 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
3857 | temp_tid = proc_get_current_thread (pi); |
3858 | if (!find_procinfo (pi->pid, temp_tid)) | |
3859 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
3860 | |
3861 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 3862 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 3863 | if (!in_thread_list (temp_ptid)) |
93815fbf | 3864 | add_thread (temp_ptid); |
c3f6f71d JM |
3865 | |
3866 | status->kind = TARGET_WAITKIND_STOPPED; | |
3867 | status->value.sig = 0; | |
3868 | return retval; | |
3869 | } | |
3870 | #endif | |
3871 | case PR_JOBCONTROL: | |
3872 | wstat = (what << 8) | 0177; | |
3873 | break; | |
3874 | case PR_FAULTED: | |
7af6341f | 3875 | switch (what) { |
c3f6f71d JM |
3876 | #ifdef FLTWATCH |
3877 | case FLTWATCH: | |
3878 | wstat = (SIGTRAP << 8) | 0177; | |
3879 | break; | |
3880 | #endif | |
3881 | #ifdef FLTKWATCH | |
3882 | case FLTKWATCH: | |
3883 | wstat = (SIGTRAP << 8) | 0177; | |
3884 | break; | |
3885 | #endif | |
0df8b418 | 3886 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 3887 | case FLTPRIV: |
0df8b418 | 3888 | #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3889 | case FLTILL: |
3890 | #endif | |
3891 | wstat = (SIGILL << 8) | 0177; | |
3892 | break; | |
3893 | case FLTBPT: | |
0df8b418 | 3894 | #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3895 | case FLTTRACE: |
3896 | #endif | |
77382aee PA |
3897 | /* If we hit our __dbx_link() internal breakpoint, |
3898 | then remove it. See comments in procfs_init_inferior() | |
3899 | for more details. */ | |
3900 | if (dbx_link_bpt_addr != 0 | |
3901 | && dbx_link_bpt_addr | |
fb14de7b | 3902 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 3903 | remove_dbx_link_breakpoint (); |
9185ddce | 3904 | |
c3f6f71d JM |
3905 | wstat = (SIGTRAP << 8) | 0177; |
3906 | break; | |
3907 | case FLTSTACK: | |
3908 | case FLTACCESS: | |
0df8b418 | 3909 | #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3910 | case FLTBOUNDS: |
3911 | #endif | |
3912 | wstat = (SIGSEGV << 8) | 0177; | |
3913 | break; | |
3914 | case FLTIOVF: | |
3915 | case FLTIZDIV: | |
0df8b418 | 3916 | #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3917 | case FLTFPE: |
3918 | #endif | |
3919 | wstat = (SIGFPE << 8) | 0177; | |
3920 | break; | |
3e43a32a | 3921 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
3922 | default: /* FIXME: use si_signo if possible for |
3923 | fault. */ | |
39f77062 | 3924 | retval = pid_to_ptid (-1); |
c3f6f71d | 3925 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 3926 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3927 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3928 | error (_("... giving up...")); |
c3f6f71d JM |
3929 | break; |
3930 | } | |
3931 | break; /* case PR_FAULTED: */ | |
3932 | default: /* switch (why) unmatched */ | |
3933 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 3934 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3935 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3936 | error (_("... giving up...")); |
c3f6f71d JM |
3937 | break; |
3938 | } | |
77382aee PA |
3939 | /* Got this far without error: If retval isn't in the |
3940 | threads database, add it. */ | |
dfd4cc63 | 3941 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 3942 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 3943 | !in_thread_list (retval)) |
c906108c | 3944 | { |
77382aee PA |
3945 | /* We have a new thread. We need to add it both to |
3946 | GDB's list and to our own. If we don't create a | |
3947 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 3948 | add_thread (retval); |
dfd4cc63 LM |
3949 | if (find_procinfo (ptid_get_pid (retval), |
3950 | ptid_get_lwp (retval)) == NULL) | |
3951 | create_procinfo (ptid_get_pid (retval), | |
3952 | ptid_get_lwp (retval)); | |
c906108c | 3953 | } |
c906108c | 3954 | } |
0df8b418 | 3955 | else /* Flags do not indicate STOPPED. */ |
c906108c | 3956 | { |
0df8b418 | 3957 | /* surely this can't happen... */ |
c3f6f71d JM |
3958 | printf_filtered ("procfs:%d -- process not stopped.\n", |
3959 | __LINE__); | |
3960 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 3961 | error (_("procfs: ...giving up...")); |
c906108c | 3962 | } |
c906108c | 3963 | } |
c906108c | 3964 | |
c3f6f71d JM |
3965 | if (status) |
3966 | store_waitstatus (status, wstat); | |
c906108c SS |
3967 | } |
3968 | ||
c3f6f71d JM |
3969 | return retval; |
3970 | } | |
c906108c | 3971 | |
4e73f23d RM |
3972 | /* Perform a partial transfer to/from the specified object. For |
3973 | memory transfers, fall back to the old memory xfer functions. */ | |
3974 | ||
9b409511 | 3975 | static enum target_xfer_status |
4e73f23d | 3976 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
0b62613e | 3977 | const char *annex, gdb_byte *readbuf, |
9b409511 YQ |
3978 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
3979 | ULONGEST *xfered_len) | |
4e73f23d RM |
3980 | { |
3981 | switch (object) | |
3982 | { | |
3983 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 3984 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d RM |
3985 | |
3986 | #ifdef NEW_PROC_API | |
3987 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 3988 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
9b409511 | 3989 | offset, len, xfered_len); |
4e73f23d RM |
3990 | #endif |
3991 | ||
3992 | default: | |
e75fdfca TT |
3993 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
3994 | readbuf, writebuf, offset, len, | |
3995 | xfered_len); | |
4e73f23d RM |
3996 | } |
3997 | } | |
3998 | ||
e96027e0 PA |
3999 | /* Helper for procfs_xfer_partial that handles memory transfers. |
4000 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 4001 | |
e96027e0 PA |
4002 | static enum target_xfer_status |
4003 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
4004 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
4005 | { |
4006 | procinfo *pi; | |
e96027e0 | 4007 | int nbytes; |
c906108c | 4008 | |
0df8b418 | 4009 | /* Find procinfo for main process. */ |
dfd4cc63 | 4010 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4011 | if (pi->as_fd == 0 && |
4012 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4013 | { |
c3f6f71d | 4014 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 4015 | return TARGET_XFER_E_IO; |
c906108c | 4016 | } |
c906108c | 4017 | |
e96027e0 PA |
4018 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
4019 | return TARGET_XFER_E_IO; | |
4020 | ||
4021 | if (writebuf != NULL) | |
c906108c | 4022 | { |
e96027e0 PA |
4023 | PROCFS_NOTE ("write memory:\n"); |
4024 | nbytes = write (pi->as_fd, writebuf, len); | |
4025 | } | |
4026 | else | |
4027 | { | |
4028 | PROCFS_NOTE ("read memory:\n"); | |
4029 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 4030 | } |
e96027e0 PA |
4031 | if (nbytes <= 0) |
4032 | return TARGET_XFER_E_IO; | |
4033 | *xfered_len = nbytes; | |
4034 | return TARGET_XFER_OK; | |
c906108c SS |
4035 | } |
4036 | ||
77382aee PA |
4037 | /* Called by target_resume before making child runnable. Mark cached |
4038 | registers and status's invalid. If there are "dirty" caches that | |
4039 | need to be written back to the child process, do that. | |
c906108c | 4040 | |
77382aee PA |
4041 | File descriptors are also cached. As they are a limited resource, |
4042 | we cannot hold onto them indefinitely. However, as they are | |
4043 | expensive to open, we don't want to throw them away | |
4044 | indescriminately either. As a compromise, we will keep the file | |
4045 | descriptors for the parent process, but discard any file | |
4046 | descriptors we may have accumulated for the threads. | |
4047 | ||
4048 | As this function is called by iterate_over_threads, it always | |
4049 | returns zero (so that iterate_over_threads will keep | |
4050 | iterating). */ | |
c3f6f71d JM |
4051 | |
4052 | static int | |
fba45db2 | 4053 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4054 | { |
77382aee PA |
4055 | /* About to run the child; invalidate caches and do any other |
4056 | cleanup. */ | |
c906108c | 4057 | |
c3f6f71d JM |
4058 | #if 0 |
4059 | if (pi->gregs_dirty) | |
4060 | if (parent == NULL || | |
4061 | proc_get_current_thread (parent) != pi->tid) | |
4062 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4063 | proc_warn (pi, "target_resume, set_gregs", | |
4064 | __LINE__); | |
f5656ead | 4065 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
4066 | if (pi->fpregs_dirty) |
4067 | if (parent == NULL || | |
4068 | proc_get_current_thread (parent) != pi->tid) | |
4069 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4070 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4071 | __LINE__); |
c906108c | 4072 | #endif |
c906108c | 4073 | |
c3f6f71d | 4074 | if (parent != NULL) |
c906108c | 4075 | { |
c3f6f71d | 4076 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4077 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4078 | We don't do this to the master (parent) procinfo. */ |
4079 | ||
4080 | close_procinfo_files (pi); | |
c906108c | 4081 | } |
c3f6f71d JM |
4082 | pi->gregs_valid = 0; |
4083 | pi->fpregs_valid = 0; | |
4084 | #if 0 | |
4085 | pi->gregs_dirty = 0; | |
4086 | pi->fpregs_dirty = 0; | |
c906108c | 4087 | #endif |
c3f6f71d JM |
4088 | pi->status_valid = 0; |
4089 | pi->threads_valid = 0; | |
c906108c | 4090 | |
c3f6f71d | 4091 | return 0; |
c906108c SS |
4092 | } |
4093 | ||
0fda6bd2 | 4094 | #if 0 |
77382aee PA |
4095 | /* A callback function for iterate_over_threads. Find the |
4096 | asynchronous signal thread, and make it runnable. See if that | |
4097 | helps matters any. */ | |
c906108c | 4098 | |
c3f6f71d | 4099 | static int |
fba45db2 | 4100 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4101 | { |
c3f6f71d JM |
4102 | #ifdef PR_ASLWP |
4103 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4104 | { |
c3f6f71d JM |
4105 | if (!proc_run_process (pi, 0, -1)) |
4106 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4107 | return 1; | |
c906108c | 4108 | } |
c906108c | 4109 | #endif |
c3f6f71d | 4110 | return 0; |
c906108c | 4111 | } |
0fda6bd2 | 4112 | #endif |
c906108c | 4113 | |
77382aee PA |
4114 | /* Make the child process runnable. Normally we will then call |
4115 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4116 | ||
4117 | If STEP is true, then arrange for the child to stop again after | |
4118 | executing a single instruction. If SIGNO is zero, then cancel any | |
4119 | pending signal; if non-zero, then arrange for the indicated signal | |
4120 | to be delivered to the child when it runs. If PID is -1, then | |
4121 | allow any child thread to run; if non-zero, then allow only the | |
4122 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4123 | |
4124 | static void | |
28439f5e | 4125 | procfs_resume (struct target_ops *ops, |
2ea28649 | 4126 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 4127 | { |
c3f6f71d JM |
4128 | procinfo *pi, *thread; |
4129 | int native_signo; | |
4130 | ||
19958708 | 4131 | /* 2.1: |
c3f6f71d | 4132 | prrun.prflags |= PRSVADDR; |
19958708 | 4133 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4134 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4135 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4136 | prrun.prflags |= PRCFAULT; clear current fault. |
4137 | ||
4138 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4139 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4140 | PRSVADDR is unnecessary. |
4141 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4142 | This basically leaves PRSTEP and PRCSIG. | |
4143 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4144 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4145 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 4146 | |
0df8b418 | 4147 | /* Find procinfo for main process. */ |
dfd4cc63 | 4148 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 4149 | |
77382aee | 4150 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4151 | errno = 0; |
c906108c | 4152 | |
c3f6f71d JM |
4153 | /* Convert signal to host numbering. */ |
4154 | if (signo == 0 || | |
a493e3e2 | 4155 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4156 | native_signo = 0; |
4157 | else | |
2ea28649 | 4158 | native_signo = gdb_signal_to_host (signo); |
c906108c | 4159 | |
c3f6f71d | 4160 | pi->ignore_next_sigstop = 0; |
c906108c | 4161 | |
77382aee PA |
4162 | /* Running the process voids all cached registers and status. */ |
4163 | /* Void the threads' caches first. */ | |
19958708 | 4164 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4165 | /* Void the process procinfo's caches. */ |
4166 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4167 | |
dfd4cc63 | 4168 | if (ptid_get_pid (ptid) != -1) |
c906108c | 4169 | { |
77382aee PA |
4170 | /* Resume a specific thread, presumably suppressing the |
4171 | others. */ | |
dfd4cc63 | 4172 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 4173 | if (thread != NULL) |
c906108c | 4174 | { |
c3f6f71d JM |
4175 | if (thread->tid != 0) |
4176 | { | |
77382aee PA |
4177 | /* We're to resume a specific thread, and not the |
4178 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4179 | #ifdef PR_ASYNC |
4180 | if (!proc_set_async (pi)) | |
4181 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4182 | #endif | |
4183 | #if 0 | |
19958708 | 4184 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4185 | make_signal_thread_runnable, |
4186 | NULL); | |
4187 | #endif | |
0df8b418 MS |
4188 | pi = thread; /* Substitute the thread's procinfo |
4189 | for run. */ | |
c3f6f71d | 4190 | } |
c906108c SS |
4191 | } |
4192 | } | |
c906108c | 4193 | |
c3f6f71d | 4194 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4195 | { |
c3f6f71d | 4196 | if (errno == EBUSY) |
77382aee PA |
4197 | warning (_("resume: target already running. " |
4198 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4199 | else |
4200 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4201 | } |
c3f6f71d | 4202 | } |
c906108c | 4203 | |
77382aee | 4204 | /* Set up to trace signals in the child process. */ |
c906108c | 4205 | |
c3f6f71d | 4206 | static void |
94bedb42 TT |
4207 | procfs_pass_signals (struct target_ops *self, |
4208 | int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 4209 | { |
37de36c6 | 4210 | gdb_sigset_t signals; |
dfd4cc63 | 4211 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 4212 | int signo; |
c906108c | 4213 | |
2455069d UW |
4214 | prfillset (&signals); |
4215 | ||
4216 | for (signo = 0; signo < NSIG; signo++) | |
4217 | { | |
2ea28649 | 4218 | int target_signo = gdb_signal_from_host (signo); |
2455069d UW |
4219 | if (target_signo < numsigs && pass_signals[target_signo]) |
4220 | gdb_prdelset (&signals, signo); | |
4221 | } | |
4222 | ||
4223 | if (!proc_set_traced_signals (pi, &signals)) | |
4224 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 4225 | } |
c906108c | 4226 | |
77382aee | 4227 | /* Print status information about the child process. */ |
c906108c | 4228 | |
c3f6f71d | 4229 | static void |
fba45db2 | 4230 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4231 | { |
181e7f93 | 4232 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 4233 | |
a3f17187 | 4234 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4235 | inf->attach_flag? "attached": "child", |
39f77062 | 4236 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4237 | } |
c906108c | 4238 | |
77382aee PA |
4239 | /* Stop the child process asynchronously, as when the gdb user types |
4240 | control-c or presses a "stop" button. Works by sending | |
4241 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4242 | |
c3f6f71d | 4243 | static void |
1eab8a48 | 4244 | procfs_stop (struct target_ops *self, ptid_t ptid) |
c3f6f71d | 4245 | { |
7e1789f5 | 4246 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4247 | } |
4248 | ||
77382aee PA |
4249 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4250 | should only be applied to the real process, not to an LWP, because | |
4251 | of the check for parent-process. If we need this to work for an | |
4252 | LWP, it needs some more logic. */ | |
c906108c | 4253 | |
c3f6f71d | 4254 | static void |
fba45db2 | 4255 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4256 | { |
4257 | int parent_pid; | |
c906108c | 4258 | |
c3f6f71d JM |
4259 | parent_pid = proc_parent_pid (pi); |
4260 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
0df8b418 | 4261 | /* FIXME: use access functions. */ |
c3f6f71d JM |
4262 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal |
4263 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4264 | file for the inferior. */ | |
4265 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4266 | { | |
4267 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4268 | } | |
4269 | #endif | |
4270 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4271 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4272 | to kill the inferior, otherwise it might remain stopped with a | |
4273 | pending SIGKILL. | |
4274 | We do not check the result of the PIOCSSIG, the inferior might have | |
4275 | died already. */ | |
4276 | { | |
37de36c6 | 4277 | gdb_siginfo_t newsiginfo; |
c906108c | 4278 | |
c3f6f71d JM |
4279 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4280 | newsiginfo.si_signo = SIGKILL; | |
4281 | newsiginfo.si_code = 0; | |
4282 | newsiginfo.si_errno = 0; | |
4283 | newsiginfo.si_pid = getpid (); | |
4284 | newsiginfo.si_uid = getuid (); | |
0df8b418 | 4285 | /* FIXME: use proc_set_current_signal. */ |
c3f6f71d JM |
4286 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
4287 | } | |
4288 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4289 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4290 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4291 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4292 | destroy_procinfo (pi); | |
c906108c | 4293 | |
c3f6f71d JM |
4294 | /* If pi is GDB's child, wait for it to die. */ |
4295 | if (parent_pid == getpid ()) | |
19958708 | 4296 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4297 | Should we check the returned event? */ |
4298 | { | |
0d06e24b | 4299 | #if 0 |
c3f6f71d | 4300 | int status, ret; |
c906108c | 4301 | |
c3f6f71d JM |
4302 | ret = waitpid (pi->pid, &status, 0); |
4303 | #else | |
4304 | wait (NULL); | |
4305 | #endif | |
4306 | } | |
4307 | } | |
c906108c | 4308 | |
77382aee PA |
4309 | /* We're done debugging it, and we want it to go away. Then we want |
4310 | GDB to forget all about it. */ | |
c906108c | 4311 | |
19958708 | 4312 | static void |
7d85a9c0 | 4313 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4314 | { |
39f77062 | 4315 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 4316 | { |
0df8b418 | 4317 | /* Find procinfo for main process. */ |
dfd4cc63 | 4318 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 4319 | |
c3f6f71d JM |
4320 | if (pi) |
4321 | unconditionally_kill_inferior (pi); | |
4322 | target_mourn_inferior (); | |
c906108c | 4323 | } |
c3f6f71d JM |
4324 | } |
4325 | ||
77382aee | 4326 | /* Forget we ever debugged this thing! */ |
c906108c | 4327 | |
19958708 | 4328 | static void |
136d6dae | 4329 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4330 | { |
4331 | procinfo *pi; | |
c906108c | 4332 | |
39f77062 | 4333 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 4334 | { |
0df8b418 | 4335 | /* Find procinfo for main process. */ |
dfd4cc63 | 4336 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4337 | if (pi) |
4338 | destroy_procinfo (pi); | |
c906108c | 4339 | } |
6a3cb8e8 PA |
4340 | |
4341 | generic_mourn_inferior (); | |
8181d85f DJ |
4342 | |
4343 | if (dbx_link_bpt != NULL) | |
4344 | { | |
f5656ead | 4345 | deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt); |
8181d85f DJ |
4346 | dbx_link_bpt_addr = 0; |
4347 | dbx_link_bpt = NULL; | |
4348 | } | |
4349 | ||
6a3cb8e8 | 4350 | inf_child_maybe_unpush_target (ops); |
c3f6f71d | 4351 | } |
c906108c | 4352 | |
77382aee PA |
4353 | /* When GDB forks to create a runnable inferior process, this function |
4354 | is called on the parent side of the fork. It's job is to do | |
4355 | whatever is necessary to make the child ready to be debugged, and | |
4356 | then wait for the child to synchronize. */ | |
c906108c | 4357 | |
19958708 | 4358 | static void |
28439f5e | 4359 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4360 | { |
4361 | procinfo *pi; | |
37de36c6 | 4362 | gdb_sigset_t signals; |
c3f6f71d | 4363 | int fail; |
2689673f | 4364 | int lwpid; |
c906108c | 4365 | |
c3f6f71d JM |
4366 | /* This routine called on the parent side (GDB side) |
4367 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
4368 | if (!target_is_pushed (ops)) |
4369 | push_target (ops); | |
c906108c | 4370 | |
c3f6f71d | 4371 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 4372 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
4373 | |
4374 | if (!open_procinfo_files (pi, FD_CTL)) | |
4375 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4376 | ||
4377 | /* | |
4378 | xmalloc // done | |
4379 | open_procinfo_files // done | |
4380 | link list // done | |
4381 | prfillset (trace) | |
4382 | procfs_notice_signals | |
4383 | prfillset (fault) | |
4384 | prdelset (FLTPAGE) | |
4385 | PIOCWSTOP | |
4386 | PIOCSFAULT | |
4387 | */ | |
4388 | ||
77382aee | 4389 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4390 | if (!(proc_flags (pi) & PR_STOPPED) && |
4391 | !(proc_wait_for_stop (pi))) | |
4392 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4393 | ||
4394 | /* Save some of the /proc state to be restored if we detach. */ | |
4395 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 4396 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
4397 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
4398 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4399 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4400 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4401 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4402 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4403 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4404 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4405 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4406 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4407 | ||
c3f6f71d JM |
4408 | if ((fail = procfs_debug_inferior (pi)) != 0) |
4409 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4410 | ||
0d06e24b JM |
4411 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4412 | and possibly even turning ON kill-on-last-close at this point. But | |
4413 | I can't make that change without careful testing which I don't have | |
4414 | time to do right now... */ | |
c3f6f71d JM |
4415 | /* Turn on run-on-last-close flag so that the child |
4416 | will die if GDB goes away for some reason. */ | |
4417 | if (!proc_set_run_on_last_close (pi)) | |
4418 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4419 | ||
2689673f PA |
4420 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4421 | lwpid = proc_get_current_thread (pi); | |
4422 | ||
4423 | /* Create a procinfo for the main lwp. */ | |
4424 | create_procinfo (pid, lwpid); | |
4425 | ||
4426 | /* We already have a main thread registered in the thread table at | |
4427 | this point, but it didn't have any lwp info yet. Notify the core | |
4428 | about it. This changes inferior_ptid as well. */ | |
4429 | thread_change_ptid (pid_to_ptid (pid), | |
793e1c06 | 4430 | ptid_build (pid, lwpid, 0)); |
c906108c | 4431 | |
c3f6f71d | 4432 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4433 | |
4434 | #ifdef SYS_syssgi | |
4435 | /* On mips-irix, we need to stop the inferior early enough during | |
4436 | the startup phase in order to be able to load the shared library | |
4437 | symbols and insert the breakpoints that are located in these shared | |
4438 | libraries. Stopping at the program entry point is not good enough | |
4439 | because the -init code is executed before the execution reaches | |
4440 | that point. | |
4441 | ||
4442 | So what we need to do is to insert a breakpoint in the runtime | |
4443 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4444 | called by rld once all shared libraries have been mapped, but before | |
0df8b418 | 4445 | the -init code is executed. Unfortuantely, this is not straightforward, |
9185ddce JB |
4446 | as rld is not part of the executable we are running, and thus we need |
4447 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4448 | |
9185ddce JB |
4449 | For this, we trace all syssgi() syscall exit events. Each time |
4450 | we detect such an event, we iterate over each text memory maps, | |
4451 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4452 | When found, we know that rld has been mapped, and that we can insert | |
4453 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4454 | has been inserted, the syssgi() notifications are no longer necessary, | |
4455 | so they should be canceled. */ | |
4456 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4457 | #endif |
c3f6f71d | 4458 | } |
c906108c | 4459 | |
77382aee PA |
4460 | /* When GDB forks to create a new process, this function is called on |
4461 | the child side of the fork before GDB exec's the user program. Its | |
4462 | job is to make the child minimally debuggable, so that the parent | |
4463 | GDB process can connect to the child and take over. This function | |
4464 | should do only the minimum to make that possible, and to | |
4465 | synchronize with the parent process. The parent process should | |
4466 | take care of the details. */ | |
c3f6f71d JM |
4467 | |
4468 | static void | |
fba45db2 | 4469 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4470 | { |
4471 | /* This routine called on the child side (inferior side) | |
4472 | after GDB forks the inferior. It must use only local variables, | |
4473 | because it may be sharing data space with its parent. */ | |
c906108c | 4474 | |
c3f6f71d | 4475 | procinfo *pi; |
37de36c6 | 4476 | sysset_t *exitset; |
c906108c | 4477 | |
c3f6f71d | 4478 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4479 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4480 | |
c3f6f71d JM |
4481 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4482 | { | |
4483 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4484 | gdb_flush (gdb_stderr); | |
77382aee PA |
4485 | /* No need to call "dead_procinfo", because we're going to |
4486 | exit. */ | |
c3f6f71d JM |
4487 | _exit (127); |
4488 | } | |
c906108c | 4489 | |
c3f6f71d JM |
4490 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4491 | /* OSF method for tracing exec syscalls. Quoting: | |
4492 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4493 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4494 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4495 | { |
4496 | int prfs_flags; | |
c906108c | 4497 | |
c3f6f71d JM |
4498 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4499 | { | |
4500 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4501 | gdb_flush (gdb_stderr); | |
4502 | _exit (127); | |
4503 | } | |
4504 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4505 | |
c3f6f71d JM |
4506 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4507 | { | |
4508 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4509 | gdb_flush (gdb_stderr); | |
4510 | _exit (127); | |
4511 | } | |
4512 | } | |
4513 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4514 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4515 | /* GW: Rationale... |
4516 | Not all systems with /proc have all the exec* syscalls with the same | |
4517 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4518 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4519 | |
37de36c6 KB |
4520 | exitset = sysset_t_alloc (pi); |
4521 | gdb_premptysysset (exitset); | |
c3f6f71d | 4522 | #ifdef SYS_exec |
37de36c6 | 4523 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4524 | #endif |
4525 | #ifdef SYS_execve | |
37de36c6 | 4526 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4527 | #endif |
4528 | #ifdef SYS_execv | |
37de36c6 | 4529 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4530 | #endif |
37de36c6 KB |
4531 | #ifdef DYNAMIC_SYSCALLS |
4532 | { | |
4533 | int callnum = find_syscall (pi, "execve"); | |
4534 | ||
4535 | if (callnum >= 0) | |
4536 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4537 | |
37de36c6 KB |
4538 | callnum = find_syscall (pi, "ra_execve"); |
4539 | if (callnum >= 0) | |
4540 | gdb_praddsysset (exitset, callnum); | |
4541 | } | |
4542 | #endif /* DYNAMIC_SYSCALLS */ | |
4543 | ||
4544 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4545 | { |
c3f6f71d JM |
4546 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4547 | gdb_flush (gdb_stderr); | |
4548 | _exit (127); | |
c906108c | 4549 | } |
c3f6f71d JM |
4550 | #endif /* PRFS_STOPEXEC */ |
4551 | ||
0df8b418 | 4552 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
4553 | /* Turn off inherit on fork flag so that all grand-children |
4554 | of gdb start with tracing flags cleared. */ | |
4555 | if (!proc_unset_inherit_on_fork (pi)) | |
4556 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4557 | ||
4558 | /* Turn off run on last close flag, so that the child process | |
4559 | cannot run away just because we close our handle on it. | |
4560 | We want it to wait for the parent to attach. */ | |
4561 | if (!proc_unset_run_on_last_close (pi)) | |
4562 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4563 | ||
19958708 | 4564 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 4565 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 4566 | /*destroy_procinfo (pi);*/ |
c906108c | 4567 | } |
c906108c | 4568 | |
77382aee PA |
4569 | /* This function is called BEFORE gdb forks the inferior process. Its |
4570 | only real responsibility is to set things up for the fork, and tell | |
4571 | GDB which two functions to call after the fork (one for the parent, | |
4572 | and one for the child). | |
4573 | ||
4574 | This function does a complicated search for a unix shell program, | |
4575 | which it then uses to parse arguments and environment variables to | |
4576 | be sent to the child. I wonder whether this code could not be | |
4577 | abstracted out and shared with other unix targets such as | |
4578 | inf-ptrace? */ | |
c906108c SS |
4579 | |
4580 | static void | |
136d6dae VP |
4581 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4582 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4583 | { |
4584 | char *shell_file = getenv ("SHELL"); | |
4585 | char *tryname; | |
28439f5e PA |
4586 | int pid; |
4587 | ||
c906108c SS |
4588 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4589 | { | |
4590 | ||
4591 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4592 | just do this the normal way (via execlp, which operates by |
4593 | attempting an exec for each element of the PATH until it | |
4594 | finds one which succeeds), then there will be an exec for | |
4595 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4596 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4597 | for these failed execs with the ones for successful execs | |
4598 | (whether the exec has succeeded is stored at that time in the | |
4599 | carry bit or some such architecture-specific and | |
4600 | non-ABI-specified place). | |
4601 | ||
4602 | So I can't think of anything better than to search the PATH | |
4603 | now. This has several disadvantages: (1) There is a race | |
4604 | condition; if we find a file now and it is deleted before we | |
4605 | exec it, we lose, even if the deletion leaves a valid file | |
4606 | further down in the PATH, (2) there is no way to know exactly | |
4607 | what an executable (in the sense of "capable of being | |
4608 | exec'd") file is. Using access() loses because it may lose | |
4609 | if the caller is the superuser; failing to use it loses if | |
4610 | there are ACLs or some such. */ | |
c906108c SS |
4611 | |
4612 | char *p; | |
4613 | char *p1; | |
4614 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4615 | path is used from within GDB. */ |
c906108c SS |
4616 | char *path = getenv ("PATH"); |
4617 | int len; | |
4618 | struct stat statbuf; | |
4619 | ||
4620 | if (path == NULL) | |
4621 | path = "/bin:/usr/bin"; | |
4622 | ||
4623 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4624 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4625 | { |
4626 | p1 = strchr (p, ':'); | |
4627 | if (p1 != NULL) | |
4628 | len = p1 - p; | |
4629 | else | |
4630 | len = strlen (p); | |
4631 | strncpy (tryname, p, len); | |
4632 | tryname[len] = '\0'; | |
4633 | strcat (tryname, "/"); | |
4634 | strcat (tryname, shell_file); | |
4635 | if (access (tryname, X_OK) < 0) | |
4636 | continue; | |
4637 | if (stat (tryname, &statbuf) < 0) | |
4638 | continue; | |
4639 | if (!S_ISREG (statbuf.st_mode)) | |
4640 | /* We certainly need to reject directories. I'm not quite | |
4641 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4642 | that people want to exec() these things. */ | |
4643 | continue; | |
4644 | break; | |
4645 | } | |
4646 | if (p == NULL) | |
4647 | /* Not found. This must be an error rather than merely passing | |
4648 | the file to execlp(), because execlp() would try all the | |
4649 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4650 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4651 | __LINE__, shell_file); |
c906108c SS |
4652 | |
4653 | shell_file = tryname; | |
4654 | } | |
4655 | ||
28439f5e | 4656 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 4657 | NULL, NULL, shell_file, NULL); |
28439f5e PA |
4658 | |
4659 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4660 | } |
4661 | ||
4662 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4663 | |
27087a3d JB |
4664 | static void |
4665 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4666 | { | |
9185ddce | 4667 | #ifdef SYS_syssgi |
77382aee | 4668 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4669 | They should normally have been removed by now, but they may still |
4670 | be activated if the inferior doesn't use shared libraries, or if | |
4671 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4672 | See procfs_init_inferior() for more details. |
4673 | ||
4674 | Since these notifications are only ever enabled when we spawned | |
4675 | the inferior ourselves, there is nothing to do when the inferior | |
4676 | was created by attaching to an already running process, or when | |
4677 | debugging a core file. */ | |
4678 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4679 | return; | |
4680 | ||
dfd4cc63 LM |
4681 | proc_trace_syscalls_1 (find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
4682 | 0), SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
9185ddce | 4683 | #endif |
c906108c SS |
4684 | } |
4685 | ||
77382aee | 4686 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4687 | |
c3f6f71d | 4688 | static int |
fba45db2 | 4689 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4690 | { |
dfd4cc63 | 4691 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 4692 | |
2689673f | 4693 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4694 | add_thread (gdb_threadid); |
c906108c | 4695 | |
c3f6f71d JM |
4696 | return 0; |
4697 | } | |
4698 | ||
77382aee PA |
4699 | /* Query all the threads that the target knows about, and give them |
4700 | back to GDB to add to its list. */ | |
c3f6f71d | 4701 | |
d3581e61 | 4702 | static void |
28439f5e | 4703 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4704 | { |
4705 | procinfo *pi; | |
4706 | ||
0df8b418 | 4707 | /* Find procinfo for main process. */ |
dfd4cc63 | 4708 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4709 | proc_update_threads (pi); |
4710 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4711 | } |
4712 | ||
77382aee PA |
4713 | /* Return true if the thread is still 'alive'. This guy doesn't |
4714 | really seem to be doing his job. Got to investigate how to tell | |
4715 | when a thread is really gone. */ | |
c906108c | 4716 | |
c906108c | 4717 | static int |
28439f5e | 4718 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4719 | { |
c3f6f71d JM |
4720 | int proc, thread; |
4721 | procinfo *pi; | |
c906108c | 4722 | |
dfd4cc63 LM |
4723 | proc = ptid_get_pid (ptid); |
4724 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 4725 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
4726 | if ((pi = find_procinfo (proc, thread)) == NULL) |
4727 | return 0; | |
4728 | ||
4729 | /* If I can't get its status, it ain't alive! | |
4730 | What's more, I need to forget about it! */ | |
4731 | if (!proc_get_status (pi)) | |
4732 | { | |
4733 | destroy_procinfo (pi); | |
4734 | return 0; | |
4735 | } | |
77382aee PA |
4736 | /* I couldn't have got its status if it weren't alive, so it's |
4737 | alive. */ | |
c3f6f71d | 4738 | return 1; |
c906108c | 4739 | } |
c3f6f71d | 4740 | |
77382aee PA |
4741 | /* Convert PTID to a string. Returns the string in a static |
4742 | buffer. */ | |
c3f6f71d | 4743 | |
d3581e61 | 4744 | static char * |
117de6a9 | 4745 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
4746 | { |
4747 | static char buf[80]; | |
c3f6f71d | 4748 | |
dfd4cc63 LM |
4749 | if (ptid_get_lwp (ptid) == 0) |
4750 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 4751 | else |
dfd4cc63 | 4752 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
4753 | |
4754 | return buf; | |
c3f6f71d JM |
4755 | } |
4756 | ||
77382aee | 4757 | /* Insert a watchpoint. */ |
c3f6f71d | 4758 | |
a0911fd0 | 4759 | static int |
39f77062 | 4760 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 4761 | int after) |
c906108c | 4762 | { |
37de36c6 | 4763 | #ifndef AIX5 |
c3f6f71d | 4764 | int pflags = 0; |
19958708 | 4765 | procinfo *pi; |
c3f6f71d | 4766 | |
dfd4cc63 LM |
4767 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
4768 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
4769 | 0); | |
c3f6f71d | 4770 | |
0df8b418 MS |
4771 | /* Translate from GDB's flags to /proc's. */ |
4772 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 4773 | { |
0df8b418 | 4774 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
4775 | case hw_write: /* default watchpoint (write) */ |
4776 | pflags = WRITE_WATCHFLAG; | |
4777 | break; | |
4778 | case hw_read: /* read watchpoint */ | |
4779 | pflags = READ_WATCHFLAG; | |
4780 | break; | |
4781 | case hw_access: /* access watchpoint */ | |
4782 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4783 | break; | |
4784 | case hw_execute: /* execution HW breakpoint */ | |
4785 | pflags = EXEC_WATCHFLAG; | |
4786 | break; | |
0df8b418 | 4787 | default: /* Something weird. Return error. */ |
c906108c | 4788 | return -1; |
c3f6f71d | 4789 | } |
0df8b418 | 4790 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
4791 | pflags |= AFTER_WATCHFLAG; |
4792 | } | |
4793 | ||
4794 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4795 | { | |
0df8b418 | 4796 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
4797 | return -1; /* fail */ |
4798 | /* GDB may try to remove the same watchpoint twice. | |
4799 | If a remove request returns no match, don't error. */ | |
c906108c | 4800 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4801 | return 0; /* ignore */ |
4802 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4803 | } |
37de36c6 | 4804 | #endif /* AIX5 */ |
c906108c SS |
4805 | return 0; |
4806 | } | |
4807 | ||
1e03ad20 KB |
4808 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
4809 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
4810 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
4811 | far. | |
19958708 | 4812 | |
1e03ad20 KB |
4813 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
4814 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 4815 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
4816 | |
4817 | static int | |
5461485a TT |
4818 | procfs_can_use_hw_breakpoint (struct target_ops *self, |
4819 | int type, int cnt, int othertype) | |
1e03ad20 | 4820 | { |
1e03ad20 KB |
4821 | /* Due to the way that proc_set_watchpoint() is implemented, host |
4822 | and target pointers must be of the same size. If they are not, | |
4823 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
4824 | fact that proc_set_watchpoint() calls |
4825 | procfs_address_to_host_pointer(); a close inspection of | |
4826 | procfs_address_to_host_pointer will reveal that an internal error | |
4827 | will be generated when the host and target pointer sizes are | |
4828 | different. */ | |
f5656ead | 4829 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 4830 | |
4e906f53 | 4831 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
4832 | return 0; |
4833 | ||
4834 | /* Other tests here??? */ | |
4835 | ||
4836 | return 1; | |
1e03ad20 KB |
4837 | } |
4838 | ||
77382aee PA |
4839 | /* Returns non-zero if process is stopped on a hardware watchpoint |
4840 | fault, else returns zero. */ | |
c3f6f71d | 4841 | |
25513619 | 4842 | static int |
6a109b6b | 4843 | procfs_stopped_by_watchpoint (struct target_ops *ops) |
c906108c | 4844 | { |
c3f6f71d | 4845 | procinfo *pi; |
c906108c | 4846 | |
dfd4cc63 | 4847 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 4848 | |
c3f6f71d | 4849 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4850 | { |
c3f6f71d | 4851 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 4852 | { |
c906108c | 4853 | #ifdef FLTWATCH |
c3f6f71d JM |
4854 | if (proc_what (pi) == FLTWATCH) |
4855 | return 1; | |
c906108c SS |
4856 | #endif |
4857 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4858 | if (proc_what (pi) == FLTKWATCH) |
4859 | return 1; | |
c906108c | 4860 | #endif |
c3f6f71d | 4861 | } |
c906108c SS |
4862 | } |
4863 | return 0; | |
4864 | } | |
c906108c | 4865 | |
77382aee PA |
4866 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
4867 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
4868 | address. This function is only called if | |
4869 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
4870 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
4871 | |
4872 | static int | |
4873 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
4874 | { | |
4875 | procinfo *pi; | |
4876 | ||
dfd4cc63 | 4877 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
4878 | return proc_watchpoint_address (pi, addr); |
4879 | } | |
4880 | ||
25513619 | 4881 | static int |
7bb99c53 TT |
4882 | procfs_insert_watchpoint (struct target_ops *self, |
4883 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 4884 | struct expression *cond) |
25513619 | 4885 | { |
d92524f1 | 4886 | if (!target_have_steppable_watchpoint |
f5656ead | 4887 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
4888 | { |
4889 | /* When a hardware watchpoint fires off the PC will be left at | |
4890 | the instruction following the one which caused the | |
4891 | watchpoint. It will *NOT* be necessary for GDB to step over | |
4892 | the watchpoint. */ | |
4893 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
4894 | } | |
4895 | else | |
4896 | { | |
4897 | /* When a hardware watchpoint fires off the PC will be left at | |
4898 | the instruction which caused the watchpoint. It will be | |
4899 | necessary for GDB to step over the watchpoint. */ | |
4900 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
4901 | } | |
4902 | } | |
4903 | ||
4904 | static int | |
11b5219a TT |
4905 | procfs_remove_watchpoint (struct target_ops *self, |
4906 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 4907 | struct expression *cond) |
25513619 PA |
4908 | { |
4909 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
4910 | } | |
4911 | ||
4912 | static int | |
31568a15 TT |
4913 | procfs_region_ok_for_hw_watchpoint (struct target_ops *self, |
4914 | CORE_ADDR addr, int len) | |
25513619 PA |
4915 | { |
4916 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
4917 | system can support "thousands" of hardware watchpoints, but gives | |
4918 | no method for finding out how many; It doesn't say anything about | |
4919 | the allowed size for the watched area either. So we just tell | |
4920 | GDB 'yes'. */ | |
4921 | return 1; | |
4922 | } | |
4923 | ||
4924 | void | |
4925 | procfs_use_watchpoints (struct target_ops *t) | |
4926 | { | |
4927 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
4928 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
4929 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
4930 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 4931 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 4932 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
4933 | } |
4934 | ||
77382aee PA |
4935 | /* Memory Mappings Functions: */ |
4936 | ||
4937 | /* Call a callback function once for each mapping, passing it the | |
4938 | mapping, an optional secondary callback function, and some optional | |
4939 | opaque data. Quit and return the first non-zero value returned | |
4940 | from the callback. | |
4941 | ||
4942 | PI is the procinfo struct for the process to be mapped. FUNC is | |
4943 | the callback function to be called by this iterator. DATA is the | |
4944 | optional opaque data to be passed to the callback function. | |
4945 | CHILD_FUNC is the optional secondary function pointer to be passed | |
4946 | to the child function. Returns the first non-zero return value | |
4947 | from the callback function, or zero. */ | |
831e682e MS |
4948 | |
4949 | static int | |
b8edc417 | 4950 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 4951 | void *data, |
19958708 | 4952 | int (*func) (struct prmap *map, |
b8edc417 | 4953 | find_memory_region_ftype child_func, |
831e682e MS |
4954 | void *data)) |
4955 | { | |
4956 | char pathname[MAX_PROC_NAME_SIZE]; | |
4957 | struct prmap *prmaps; | |
4958 | struct prmap *prmap; | |
4959 | int funcstat; | |
4960 | int map_fd; | |
4961 | int nmap; | |
0a86f364 | 4962 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e MS |
4963 | #ifdef NEW_PROC_API |
4964 | struct stat sbuf; | |
4965 | #endif | |
4966 | ||
19958708 | 4967 | /* Get the number of mappings, allocate space, |
831e682e MS |
4968 | and read the mappings into prmaps. */ |
4969 | #ifdef NEW_PROC_API | |
0df8b418 | 4970 | /* Open map fd. */ |
831e682e MS |
4971 | sprintf (pathname, "/proc/%d/map", pi->pid); |
4972 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
4973 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
4974 | ||
0df8b418 | 4975 | /* Make sure it gets closed again. */ |
831e682e MS |
4976 | make_cleanup_close (map_fd); |
4977 | ||
19958708 | 4978 | /* Use stat to determine the file size, and compute |
831e682e MS |
4979 | the number of prmap_t objects it contains. */ |
4980 | if (fstat (map_fd, &sbuf) != 0) | |
4981 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
4982 | ||
4983 | nmap = sbuf.st_size / sizeof (prmap_t); | |
4984 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
4985 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
4986 | != (nmap * sizeof (*prmaps))) | |
4987 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
4988 | #else | |
4989 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
4990 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
4991 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
4992 | ||
4993 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
4994 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
4995 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
4996 | #endif | |
4997 | ||
4998 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
4999 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
5000 | { |
5001 | do_cleanups (cleanups); | |
5002 | return funcstat; | |
5003 | } | |
831e682e | 5004 | |
0a86f364 | 5005 | do_cleanups (cleanups); |
831e682e MS |
5006 | return 0; |
5007 | } | |
5008 | ||
77382aee | 5009 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 5010 | function for each memory region. |
77382aee | 5011 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
5012 | |
5013 | static int | |
19958708 | 5014 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 5015 | find_memory_region_ftype func, void *data) |
be4d1333 | 5016 | { |
bf75638e | 5017 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5018 | map->pr_size, |
be4d1333 MS |
5019 | (map->pr_mflags & MA_READ) != 0, |
5020 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5021 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 5022 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
5023 | data); |
5024 | } | |
5025 | ||
77382aee PA |
5026 | /* External interface. Calls a callback function once for each |
5027 | mapped memory region in the child process, passing as arguments: | |
5028 | ||
5029 | CORE_ADDR virtual_address, | |
5030 | unsigned long size, | |
5031 | int read, TRUE if region is readable by the child | |
5032 | int write, TRUE if region is writable by the child | |
5033 | int execute TRUE if region is executable by the child. | |
5034 | ||
5035 | Stops iterating and returns the first non-zero value returned by | |
5036 | the callback. */ | |
be4d1333 MS |
5037 | |
5038 | static int | |
2e73927c TT |
5039 | proc_find_memory_regions (struct target_ops *self, |
5040 | find_memory_region_ftype func, void *data) | |
be4d1333 | 5041 | { |
dfd4cc63 | 5042 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 5043 | |
19958708 | 5044 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5045 | find_memory_regions_callback); |
5046 | } | |
5047 | ||
77382aee | 5048 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5049 | |
388faa48 | 5050 | static char * |
5ae5f592 | 5051 | mappingflags (long flags) |
388faa48 MS |
5052 | { |
5053 | static char asciiflags[8]; | |
5054 | ||
5055 | strcpy (asciiflags, "-------"); | |
5056 | #if defined (MA_PHYS) | |
5057 | if (flags & MA_PHYS) | |
5058 | asciiflags[0] = 'd'; | |
5059 | #endif | |
5060 | if (flags & MA_STACK) | |
5061 | asciiflags[1] = 's'; | |
5062 | if (flags & MA_BREAK) | |
5063 | asciiflags[2] = 'b'; | |
5064 | if (flags & MA_SHARED) | |
5065 | asciiflags[3] = 's'; | |
5066 | if (flags & MA_READ) | |
5067 | asciiflags[4] = 'r'; | |
5068 | if (flags & MA_WRITE) | |
5069 | asciiflags[5] = 'w'; | |
5070 | if (flags & MA_EXEC) | |
5071 | asciiflags[6] = 'x'; | |
5072 | return (asciiflags); | |
5073 | } | |
5074 | ||
77382aee PA |
5075 | /* Callback function, does the actual work for 'info proc |
5076 | mappings'. */ | |
831e682e | 5077 | |
831e682e | 5078 | static int |
b8edc417 | 5079 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 5080 | void *unused) |
831e682e | 5081 | { |
0b62613e | 5082 | unsigned int pr_off; |
831e682e | 5083 | |
831e682e | 5084 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5085 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5086 | #else |
0b62613e | 5087 | pr_off = map->pr_off; |
831e682e | 5088 | #endif |
0b62613e | 5089 | |
f5656ead | 5090 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 5091 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5092 | (unsigned long) map->pr_vaddr, |
5093 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5094 | (unsigned long) map->pr_size, |
0b62613e PA |
5095 | pr_off, |
5096 | mappingflags (map->pr_mflags)); | |
5097 | else | |
f6a96b83 | 5098 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5099 | (unsigned long) map->pr_vaddr, |
5100 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5101 | (unsigned long) map->pr_size, |
0b62613e PA |
5102 | pr_off, |
5103 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5104 | |
5105 | return 0; | |
5106 | } | |
5107 | ||
77382aee | 5108 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5109 | |
5110 | static void | |
5111 | info_proc_mappings (procinfo *pi, int summary) | |
5112 | { | |
388faa48 | 5113 | if (summary) |
0df8b418 | 5114 | return; /* No output for summary mode. */ |
388faa48 | 5115 | |
a3f17187 | 5116 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 5117 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
5118 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5119 | "Start Addr", | |
5120 | " End Addr", | |
5121 | " Size", | |
5122 | " Offset", | |
5123 | "Flags"); | |
5124 | else | |
5125 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5126 | "Start Addr", | |
5127 | " End Addr", | |
5128 | " Size", | |
5129 | " Offset", | |
5130 | "Flags"); | |
388faa48 | 5131 | |
831e682e | 5132 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5133 | printf_filtered ("\n"); |
5134 | } | |
5135 | ||
77382aee | 5136 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5137 | |
5138 | static void | |
7bc112c1 | 5139 | procfs_info_proc (struct target_ops *ops, const char *args, |
145b16a9 | 5140 | enum info_proc_what what) |
c906108c | 5141 | { |
c3f6f71d | 5142 | struct cleanup *old_chain; |
388faa48 MS |
5143 | procinfo *process = NULL; |
5144 | procinfo *thread = NULL; | |
5145 | char **argv = NULL; | |
5146 | char *tmp = NULL; | |
5147 | int pid = 0; | |
5148 | int tid = 0; | |
5149 | int mappings = 0; | |
c906108c | 5150 | |
145b16a9 UW |
5151 | switch (what) |
5152 | { | |
5153 | case IP_MINIMAL: | |
5154 | break; | |
5155 | ||
5156 | case IP_MAPPINGS: | |
5157 | case IP_ALL: | |
5158 | mappings = 1; | |
5159 | break; | |
5160 | ||
5161 | default: | |
5162 | error (_("Not supported on this target.")); | |
5163 | } | |
5164 | ||
c3f6f71d JM |
5165 | old_chain = make_cleanup (null_cleanup, 0); |
5166 | if (args) | |
0fda6bd2 | 5167 | { |
d1a41061 PP |
5168 | argv = gdb_buildargv (args); |
5169 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5170 | } |
c3f6f71d JM |
5171 | while (argv != NULL && *argv != NULL) |
5172 | { | |
5173 | if (isdigit (argv[0][0])) | |
5174 | { | |
5175 | pid = strtoul (argv[0], &tmp, 10); | |
5176 | if (*tmp == '/') | |
5177 | tid = strtoul (++tmp, NULL, 10); | |
5178 | } | |
5179 | else if (argv[0][0] == '/') | |
5180 | { | |
5181 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5182 | } | |
c3f6f71d JM |
5183 | argv++; |
5184 | } | |
5185 | if (pid == 0) | |
dfd4cc63 | 5186 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 5187 | if (pid == 0) |
8a3fe4f8 | 5188 | error (_("No current process: you must name one.")); |
c3f6f71d | 5189 | else |
c906108c | 5190 | { |
c3f6f71d | 5191 | /* Have pid, will travel. |
0df8b418 | 5192 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
5193 | process = find_procinfo (pid, 0); |
5194 | if (process == NULL) | |
5195 | { | |
19958708 | 5196 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5197 | remember to close it again when finished. */ |
5198 | process = create_procinfo (pid, 0); | |
004527cb | 5199 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5200 | if (!open_procinfo_files (process, FD_CTL)) |
5201 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5202 | } | |
c906108c | 5203 | } |
c3f6f71d JM |
5204 | if (tid != 0) |
5205 | thread = create_procinfo (pid, tid); | |
5206 | ||
5207 | if (process) | |
5208 | { | |
a3f17187 | 5209 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5210 | proc_prettyprint_flags (proc_flags (process), 1); |
5211 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5212 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5213 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5214 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5215 | proc_get_nthreads (process)); |
5216 | } | |
5217 | if (thread) | |
5218 | { | |
a3f17187 | 5219 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5220 | proc_prettyprint_flags (proc_flags (thread), 1); |
5221 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5222 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5223 | } | |
5224 | ||
388faa48 MS |
5225 | if (mappings) |
5226 | { | |
5227 | info_proc_mappings (process, 0); | |
5228 | } | |
5229 | ||
c3f6f71d | 5230 | do_cleanups (old_chain); |
c906108c SS |
5231 | } |
5232 | ||
9185ddce JB |
5233 | /* Modify the status of the system call identified by SYSCALLNUM in |
5234 | the set of syscalls that are currently traced/debugged. | |
5235 | ||
5236 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 5237 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 5238 | |
0df8b418 | 5239 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
5240 | will be disabled. */ |
5241 | ||
5242 | static void | |
5243 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5244 | int mode, int from_tty) |
9185ddce JB |
5245 | { |
5246 | sysset_t *sysset; | |
77382aee | 5247 | |
9185ddce JB |
5248 | if (entry_or_exit == PR_SYSENTRY) |
5249 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5250 | else | |
5251 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5252 | ||
5253 | if (sysset == NULL) | |
5254 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5255 | ||
5256 | if (mode == FLAG_SET) | |
5257 | gdb_praddsysset (sysset, syscallnum); | |
5258 | else | |
5259 | gdb_prdelsysset (sysset, syscallnum); | |
5260 | ||
5261 | if (entry_or_exit == PR_SYSENTRY) | |
5262 | { | |
5263 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5264 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5265 | } |
5266 | else | |
5267 | { | |
5268 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5269 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5270 | } |
5271 | } | |
5272 | ||
c3f6f71d | 5273 | static void |
fba45db2 | 5274 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5275 | { |
c3f6f71d | 5276 | procinfo *pi; |
c906108c | 5277 | |
dfd4cc63 | 5278 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 5279 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5280 | |
c3f6f71d | 5281 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5282 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5283 | |
dfd4cc63 | 5284 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
5285 | if (isdigit (args[0])) |
5286 | { | |
9185ddce | 5287 | const int syscallnum = atoi (args); |
c906108c | 5288 | |
9185ddce | 5289 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5290 | } |
5291 | } | |
5292 | ||
19958708 | 5293 | static void |
fba45db2 | 5294 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5295 | { |
c3f6f71d JM |
5296 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5297 | } | |
c906108c | 5298 | |
19958708 | 5299 | static void |
fba45db2 | 5300 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5301 | { |
5302 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5303 | } |
c906108c | 5304 | |
19958708 | 5305 | static void |
fba45db2 | 5306 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5307 | { |
5308 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5309 | } | |
5310 | ||
19958708 | 5311 | static void |
fba45db2 | 5312 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5313 | { |
c3f6f71d JM |
5314 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5315 | } | |
c906108c | 5316 | |
c906108c | 5317 | |
a0911fd0 MR |
5318 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
5319 | extern void _initialize_procfs (void); | |
5320 | ||
c906108c | 5321 | void |
fba45db2 | 5322 | _initialize_procfs (void) |
c906108c | 5323 | { |
27087a3d JB |
5324 | observer_attach_inferior_created (procfs_inferior_created); |
5325 | ||
19958708 | 5326 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5327 | _("Give a trace of entries into the syscall.")); |
19958708 | 5328 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5329 | _("Give a trace of exits from the syscall.")); |
19958708 | 5330 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5331 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5332 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5333 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5334 | } |
5335 | ||
5336 | /* =================== END, GDB "MODULE" =================== */ | |
5337 | ||
5338 | ||
5339 | ||
77382aee PA |
5340 | /* miscellaneous stubs: */ |
5341 | ||
5342 | /* The following satisfy a few random symbols mostly created by the | |
5343 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5344 | |
77382aee PA |
5345 | /* Return a pid for which we guarantee we will be able to find a |
5346 | 'live' procinfo. */ | |
c3f6f71d | 5347 | |
39f77062 | 5348 | ptid_t |
fba45db2 | 5349 | procfs_first_available (void) |
c3f6f71d | 5350 | { |
39f77062 | 5351 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5352 | } |
be4d1333 MS |
5353 | |
5354 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
05b4bd79 PA |
5355 | #if defined (PIOCOPENLWP) || defined (PCAGENT) |
5356 | /* gcore only implemented on solaris (so far) */ | |
be4d1333 MS |
5357 | |
5358 | static char * | |
19958708 | 5359 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 5360 | char *note_data, int *note_size, |
2ea28649 | 5361 | enum gdb_signal stop_signal) |
be4d1333 | 5362 | { |
594f7785 | 5363 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5364 | gdb_gregset_t gregs; |
5365 | gdb_fpregset_t fpregs; | |
5366 | unsigned long merged_pid; | |
75125405 | 5367 | struct cleanup *old_chain; |
be4d1333 | 5368 | |
dfd4cc63 | 5369 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 5370 | |
75125405 DJ |
5371 | /* This part is the old method for fetching registers. |
5372 | It should be replaced by the newer one using regsets | |
5373 | once it is implemented in this platform: | |
0df8b418 | 5374 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ |
75125405 DJ |
5375 | |
5376 | old_chain = save_inferior_ptid (); | |
5377 | inferior_ptid = ptid; | |
5378 | target_fetch_registers (regcache, -1); | |
5379 | ||
594f7785 | 5380 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5381 | #if defined (NEW_PROC_API) |
65554fef MS |
5382 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5383 | note_data, | |
5384 | note_size, | |
19958708 | 5385 | merged_pid, |
65554fef MS |
5386 | stop_signal, |
5387 | &gregs); | |
5388 | #else | |
be4d1333 | 5389 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5390 | note_data, |
5391 | note_size, | |
19958708 | 5392 | merged_pid, |
be4d1333 | 5393 | stop_signal, |
65554fef MS |
5394 | &gregs); |
5395 | #endif | |
594f7785 | 5396 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5397 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5398 | note_data, | |
5399 | note_size, | |
5400 | &fpregs, | |
5401 | sizeof (fpregs)); | |
75125405 DJ |
5402 | |
5403 | do_cleanups (old_chain); | |
5404 | ||
be4d1333 MS |
5405 | return note_data; |
5406 | } | |
5407 | ||
5408 | struct procfs_corefile_thread_data { | |
5409 | bfd *obfd; | |
5410 | char *note_data; | |
5411 | int *note_size; | |
2ea28649 | 5412 | enum gdb_signal stop_signal; |
be4d1333 MS |
5413 | }; |
5414 | ||
5415 | static int | |
65554fef | 5416 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5417 | { |
5418 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5419 | |
2689673f | 5420 | if (pi != NULL) |
be4d1333 | 5421 | { |
dfd4cc63 | 5422 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 5423 | |
75125405 | 5424 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5425 | args->note_data, |
2020b7ab PA |
5426 | args->note_size, |
5427 | args->stop_signal); | |
be4d1333 MS |
5428 | } |
5429 | return 0; | |
5430 | } | |
5431 | ||
a223f1e7 JB |
5432 | static int |
5433 | find_signalled_thread (struct thread_info *info, void *data) | |
5434 | { | |
a493e3e2 | 5435 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
5436 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
5437 | return 1; | |
5438 | ||
5439 | return 0; | |
5440 | } | |
5441 | ||
2ea28649 | 5442 | static enum gdb_signal |
a223f1e7 JB |
5443 | find_stop_signal (void) |
5444 | { | |
5445 | struct thread_info *info = | |
5446 | iterate_over_threads (find_signalled_thread, NULL); | |
5447 | ||
5448 | if (info) | |
16c381f0 | 5449 | return info->suspend.stop_signal; |
a223f1e7 | 5450 | else |
a493e3e2 | 5451 | return GDB_SIGNAL_0; |
a223f1e7 JB |
5452 | } |
5453 | ||
be4d1333 | 5454 | static char * |
fc6691b2 | 5455 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 MS |
5456 | { |
5457 | struct cleanup *old_chain; | |
5458 | gdb_gregset_t gregs; | |
5459 | gdb_fpregset_t fpregs; | |
5460 | char fname[16] = {'\0'}; | |
5461 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 5462 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 5463 | char *note_data = NULL; |
6dbdc4a3 | 5464 | char *inf_args; |
be4d1333 | 5465 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5466 | gdb_byte *auxv; |
4e73f23d | 5467 | int auxv_len; |
2ea28649 | 5468 | enum gdb_signal stop_signal; |
be4d1333 MS |
5469 | |
5470 | if (get_exec_file (0)) | |
5471 | { | |
9f37bbcc | 5472 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
5473 | fname[sizeof (fname) - 1] = 0; |
5474 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
5475 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
5476 | |
5477 | inf_args = get_inferior_args (); | |
5478 | if (inf_args && *inf_args && | |
5479 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5480 | { |
19958708 | 5481 | strncat (psargs, " ", |
be4d1333 | 5482 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5483 | strncat (psargs, inf_args, |
be4d1333 MS |
5484 | sizeof (psargs) - strlen (psargs)); |
5485 | } | |
5486 | } | |
5487 | ||
19958708 RM |
5488 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5489 | note_data, | |
5490 | note_size, | |
5491 | fname, | |
be4d1333 MS |
5492 | psargs); |
5493 | ||
651c8d2d PA |
5494 | stop_signal = find_stop_signal (); |
5495 | ||
3e3420f6 PA |
5496 | #ifdef NEW_PROC_API |
5497 | fill_gregset (get_current_regcache (), &gregs, -1); | |
5498 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 5499 | ptid_get_pid (inferior_ptid), |
3e3420f6 PA |
5500 | stop_signal, &gregs); |
5501 | #endif | |
5502 | ||
be4d1333 MS |
5503 | thread_args.obfd = obfd; |
5504 | thread_args.note_data = note_data; | |
5505 | thread_args.note_size = note_size; | |
651c8d2d | 5506 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
5507 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
5508 | &thread_args); | |
2689673f | 5509 | note_data = thread_args.note_data; |
be4d1333 | 5510 | |
13547ab6 DJ |
5511 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5512 | NULL, &auxv); | |
4e73f23d RM |
5513 | if (auxv_len > 0) |
5514 | { | |
5515 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5516 | "CORE", NT_AUXV, auxv, auxv_len); | |
5517 | xfree (auxv); | |
5518 | } | |
5519 | ||
be4d1333 MS |
5520 | return note_data; |
5521 | } | |
05b4bd79 | 5522 | #else /* !Solaris */ |
65554fef | 5523 | static char * |
fc6691b2 | 5524 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
65554fef | 5525 | { |
8a3fe4f8 | 5526 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5527 | return NULL; /* lint */ |
5528 | } | |
05b4bd79 | 5529 | #endif /* Solaris */ |
be4d1333 | 5530 | /* =================== END GCORE .NOTE "MODULE" =================== */ |