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44122162 | 1 | /* Machine independent support for Solaris /proc (process file system) for GDB. |
2555fe1a | 2 | |
e2882c85 | 3 | Copyright (C) 1999-2018 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" |
4fa7574e | 33 | #include "nat/fork-inferior.h" |
88fc5eb7 | 34 | #include "filestuff.h" |
c906108c | 35 | |
0df8b418 | 36 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c906108c | 37 | |
c3f6f71d JM |
38 | #include <sys/procfs.h> |
39 | #include <sys/fault.h> | |
40 | #include <sys/syscall.h> | |
2555fe1a | 41 | #include "gdb_wait.h" |
0fda6bd2 JM |
42 | #include <signal.h> |
43 | #include <ctype.h> | |
92107356 | 44 | #include "gdb_bfd.h" |
44270758 | 45 | #include "inflow.h" |
4e73f23d | 46 | #include "auxv.h" |
d1a7880c | 47 | #include "procfs.h" |
76727919 | 48 | #include "observable.h" |
5dc1a704 | 49 | #include "common/scoped_fd.h" |
0fda6bd2 | 50 | |
77382aee PA |
51 | /* This module provides the interface between GDB and the |
52 | /proc file system, which is used on many versions of Unix | |
53 | as a means for debuggers to control other processes. | |
54 | ||
77382aee PA |
55 | /proc works by imitating a file system: you open a simulated file |
56 | that represents the process you wish to interact with, and perform | |
57 | operations on that "file" in order to examine or change the state | |
58 | of the other process. | |
59 | ||
60 | The most important thing to know about /proc and this module is | |
61 | that there are two very different interfaces to /proc: | |
62 | ||
63 | One that uses the ioctl system call, and another that uses read | |
64 | and write system calls. | |
65 | ||
44122162 RO |
66 | This module supports only the Solaris version of the read/write |
67 | interface. */ | |
77382aee | 68 | |
c906108c | 69 | #include <sys/types.h> |
2978b111 | 70 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
c906108c | 71 | |
c3f6f71d JM |
72 | #include <fcntl.h> /* for O_RDONLY */ |
73 | #include <unistd.h> /* for "X_OK" */ | |
53ce3c39 | 74 | #include <sys/stat.h> /* for struct stat */ |
c906108c | 75 | |
103b3ef5 MS |
76 | /* Note: procfs-utils.h must be included after the above system header |
77 | files, because it redefines various system calls using macros. | |
78 | This may be incompatible with the prototype declarations. */ | |
79 | ||
103b3ef5 MS |
80 | #include "proc-utils.h" |
81 | ||
77382aee | 82 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
83 | #include "gregset.h" |
84 | ||
c3f6f71d | 85 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 86 | |
77382aee | 87 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 88 | |
c0939df1 | 89 | static void procfs_attach (struct target_ops *, const char *, int); |
70b33f19 | 90 | static void procfs_detach (struct target_ops *, inferior *, int); |
28439f5e | 91 | static void procfs_resume (struct target_ops *, |
2ea28649 | 92 | ptid_t, int, enum gdb_signal); |
a14ed312 | 93 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
94 | static void procfs_fetch_registers (struct target_ops *, |
95 | struct regcache *, int); | |
96 | static void procfs_store_registers (struct target_ops *, | |
97 | struct regcache *, int); | |
94bedb42 TT |
98 | static void procfs_pass_signals (struct target_ops *self, |
99 | int, unsigned char *); | |
7d85a9c0 | 100 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 101 | static void procfs_mourn_inferior (struct target_ops *ops); |
5f2ad7a3 RO |
102 | static void procfs_create_inferior (struct target_ops *, const char *, |
103 | const std::string &, char **, int); | |
117de6a9 | 104 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 105 | ptid_t, struct target_waitstatus *, int); |
e96027e0 PA |
106 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
107 | const gdb_byte *, | |
108 | ULONGEST, ULONGEST, | |
109 | ULONGEST *); | |
4ac248ca | 110 | static target_xfer_partial_ftype procfs_xfer_partial; |
a14ed312 | 111 | |
28439f5e | 112 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 113 | |
e8032dde | 114 | static void procfs_update_thread_list (struct target_ops *ops); |
7a114964 | 115 | static const char *procfs_pid_to_str (struct target_ops *, ptid_t); |
c3f6f71d | 116 | |
2e73927c TT |
117 | static int proc_find_memory_regions (struct target_ops *self, |
118 | find_memory_region_ftype, void *); | |
be4d1333 | 119 | |
44122162 RO |
120 | static char *procfs_make_note_section (struct target_ops *self, |
121 | bfd *, int *); | |
be4d1333 | 122 | |
5461485a | 123 | static int procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f | 124 | enum bptype, int, int); |
1e03ad20 | 125 | |
7bc112c1 | 126 | static void procfs_info_proc (struct target_ops *, const char *, |
145b16a9 UW |
127 | enum info_proc_what); |
128 | ||
b5c8fcb1 PA |
129 | static int procfs_stopped_by_watchpoint (struct target_ops *); |
130 | ||
131 | static int procfs_insert_watchpoint (struct target_ops *, | |
132 | CORE_ADDR, int, | |
133 | enum target_hw_bp_type, | |
134 | struct expression *); | |
135 | ||
136 | static int procfs_remove_watchpoint (struct target_ops *, | |
137 | CORE_ADDR, int, | |
138 | enum target_hw_bp_type, | |
139 | struct expression *); | |
140 | ||
141 | static int procfs_region_ok_for_hw_watchpoint (struct target_ops *, | |
142 | CORE_ADDR, int); | |
143 | static int procfs_stopped_data_address (struct target_ops *, CORE_ADDR *); | |
144 | ||
c47ffbe3 | 145 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
146 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
147 | is presented in 64-bit format. We need to provide a custom parser | |
148 | to handle that. */ | |
c47ffbe3 VP |
149 | static int |
150 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
77382aee | 151 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
c47ffbe3 | 152 | { |
f5656ead | 153 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
154 | gdb_byte *ptr = *readptr; |
155 | ||
156 | if (endptr == ptr) | |
157 | return 0; | |
77382aee | 158 | |
c47ffbe3 VP |
159 | if (endptr - ptr < 8 * 2) |
160 | return -1; | |
161 | ||
e17a4113 | 162 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
163 | ptr += 8; |
164 | /* The size of data is always 64-bit. If the application is 32-bit, | |
165 | it will be zero extended, as expected. */ | |
e17a4113 | 166 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
167 | ptr += 8; |
168 | ||
169 | *readptr = ptr; | |
170 | return 1; | |
171 | } | |
172 | #endif | |
173 | ||
c1955e17 PA |
174 | /* Create a procfs target. */ |
175 | ||
176 | static struct target_ops * | |
28439f5e | 177 | procfs_target (void) |
c3f6f71d | 178 | { |
28439f5e PA |
179 | struct target_ops *t = inf_child_target (); |
180 | ||
77382aee PA |
181 | t->to_create_inferior = procfs_create_inferior; |
182 | t->to_kill = procfs_kill_inferior; | |
183 | t->to_mourn_inferior = procfs_mourn_inferior; | |
184 | t->to_attach = procfs_attach; | |
185 | t->to_detach = procfs_detach; | |
186 | t->to_wait = procfs_wait; | |
187 | t->to_resume = procfs_resume; | |
188 | t->to_fetch_registers = procfs_fetch_registers; | |
189 | t->to_store_registers = procfs_store_registers; | |
190 | t->to_xfer_partial = procfs_xfer_partial; | |
2455069d | 191 | t->to_pass_signals = procfs_pass_signals; |
77382aee | 192 | t->to_files_info = procfs_files_info; |
28439f5e | 193 | |
e8032dde | 194 | t->to_update_thread_list = procfs_update_thread_list; |
77382aee PA |
195 | t->to_thread_alive = procfs_thread_alive; |
196 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 197 | |
77382aee | 198 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
199 | t->to_find_memory_regions = proc_find_memory_regions; |
200 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 201 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
202 | |
203 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 204 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
205 | #endif |
206 | ||
b5c8fcb1 PA |
207 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; |
208 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
209 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
210 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
211 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; | |
212 | t->to_stopped_data_address = procfs_stopped_data_address; | |
213 | ||
77382aee | 214 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
215 | |
216 | return t; | |
c3f6f71d | 217 | } |
c906108c | 218 | |
c3f6f71d JM |
219 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
220 | ||
77382aee PA |
221 | /* World Unification: |
222 | ||
223 | Put any typedefs, defines etc. here that are required for the | |
224 | unification of code that handles different versions of /proc. */ | |
c3f6f71d | 225 | |
44122162 RO |
226 | enum { READ_WATCHFLAG = WA_READ, |
227 | WRITE_WATCHFLAG = WA_WRITE, | |
228 | EXEC_WATCHFLAG = WA_EXEC, | |
229 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
230 | }; | |
c3f6f71d JM |
231 | |
232 | ||
233 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
234 | ||
235 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
236 | ||
237 | /* The procinfo struct is a wrapper to hold all the state information | |
238 | concerning a /proc process. There should be exactly one procinfo | |
239 | for each process, and since GDB currently can debug only one | |
240 | process at a time, that means there should be only one procinfo. | |
241 | All of the LWP's of a process can be accessed indirectly thru the | |
242 | single process procinfo. | |
243 | ||
244 | However, against the day when GDB may debug more than one process, | |
245 | this data structure is kept in a list (which for now will hold no | |
246 | more than one member), and many functions will have a pointer to a | |
247 | procinfo as an argument. | |
248 | ||
249 | There will be a separate procinfo structure for use by the (not yet | |
250 | implemented) "info proc" command, so that we can print useful | |
251 | information about any random process without interfering with the | |
0df8b418 | 252 | inferior's procinfo information. */ |
c3f6f71d | 253 | |
c3f6f71d | 254 | /* format strings for /proc paths */ |
44122162 RO |
255 | #define MAIN_PROC_NAME_FMT "/proc/%d" |
256 | #define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
257 | #define AS_PROC_NAME_FMT "/proc/%d/as" | |
258 | #define MAP_PROC_NAME_FMT "/proc/%d/map" | |
259 | #define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
260 | #define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
c906108c | 261 | |
c3f6f71d JM |
262 | typedef struct procinfo { |
263 | struct procinfo *next; | |
264 | int pid; /* Process ID */ | |
265 | int tid; /* Thread/LWP id */ | |
c906108c | 266 | |
c3f6f71d JM |
267 | /* process state */ |
268 | int was_stopped; | |
269 | int ignore_next_sigstop; | |
c906108c | 270 | |
c3f6f71d | 271 | int ctl_fd; /* File descriptor for /proc control file */ |
c3f6f71d JM |
272 | int status_fd; /* File descriptor for /proc status file */ |
273 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 274 | |
c3f6f71d | 275 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 276 | |
c3f6f71d | 277 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
44122162 RO |
278 | sigset_t saved_sigset; /* Saved traced signal set */ |
279 | sigset_t saved_sighold; /* Saved held signal set */ | |
37de36c6 KB |
280 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
281 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 282 | |
44122162 | 283 | pstatus_t prstatus; /* Current process status info */ |
19958708 | 284 | |
c3f6f71d | 285 | struct procinfo *thread_list; |
c906108c | 286 | |
c3f6f71d JM |
287 | int status_valid : 1; |
288 | int gregs_valid : 1; | |
289 | int fpregs_valid : 1; | |
290 | int threads_valid: 1; | |
291 | } procinfo; | |
c906108c | 292 | |
c3f6f71d | 293 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 294 | |
c3f6f71d | 295 | /* Function prototypes for procinfo module: */ |
c906108c | 296 | |
a14ed312 KB |
297 | static procinfo *find_procinfo_or_die (int pid, int tid); |
298 | static procinfo *find_procinfo (int pid, int tid); | |
299 | static procinfo *create_procinfo (int pid, int tid); | |
44122162 | 300 | static void destroy_procinfo (procinfo *p); |
004527cb | 301 | static void do_destroy_procinfo_cleanup (void *); |
44122162 RO |
302 | static void dead_procinfo (procinfo *p, const char *msg, int killp); |
303 | static int open_procinfo_files (procinfo *p, int which); | |
304 | static void close_procinfo_files (procinfo *p); | |
305 | static sysset_t *sysset_t_alloc (procinfo *pi); | |
c906108c | 306 | |
e9ef4f39 | 307 | static int iterate_over_mappings |
b8edc417 JK |
308 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
309 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 310 | void *data)); |
e9ef4f39 | 311 | |
c3f6f71d | 312 | /* The head of the procinfo list: */ |
44122162 | 313 | static procinfo *procinfo_list; |
c906108c | 314 | |
77382aee PA |
315 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
316 | not found. */ | |
c906108c | 317 | |
19958708 | 318 | static procinfo * |
fba45db2 | 319 | find_procinfo (int pid, int tid) |
c5aa993b | 320 | { |
c3f6f71d | 321 | procinfo *pi; |
c906108c | 322 | |
c3f6f71d JM |
323 | for (pi = procinfo_list; pi; pi = pi->next) |
324 | if (pi->pid == pid) | |
325 | break; | |
c906108c | 326 | |
c3f6f71d JM |
327 | if (pi) |
328 | if (tid) | |
329 | { | |
330 | /* Don't check threads_valid. If we're updating the | |
331 | thread_list, we want to find whatever threads are already | |
332 | here. This means that in general it is the caller's | |
333 | responsibility to check threads_valid and update before | |
334 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 335 | thread. */ |
c3f6f71d JM |
336 | |
337 | for (pi = pi->thread_list; pi; pi = pi->next) | |
338 | if (pi->tid == tid) | |
339 | break; | |
340 | } | |
c906108c | 341 | |
c3f6f71d JM |
342 | return pi; |
343 | } | |
c906108c | 344 | |
77382aee | 345 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 346 | |
c3f6f71d | 347 | static procinfo * |
fba45db2 | 348 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
349 | { |
350 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 351 | |
c3f6f71d | 352 | if (pi == NULL) |
0fda6bd2 JM |
353 | { |
354 | if (tid) | |
3e43a32a MS |
355 | error (_("procfs: couldn't find pid %d " |
356 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
357 | pid, tid); |
358 | else | |
8a3fe4f8 | 359 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 360 | } |
c3f6f71d JM |
361 | return pi; |
362 | } | |
c906108c | 363 | |
77382aee PA |
364 | /* Wrapper for `open'. The appropriate open call is attempted; if |
365 | unsuccessful, it will be retried as many times as needed for the | |
366 | EAGAIN and EINTR conditions. | |
19958708 | 367 | |
77382aee PA |
368 | For other conditions, retry the open a limited number of times. In |
369 | addition, a short sleep is imposed prior to retrying the open. The | |
370 | reason for this sleep is to give the kernel a chance to catch up | |
371 | and create the file in question in the event that GDB "wins" the | |
372 | race to open a file before the kernel has created it. */ | |
19958708 | 373 | |
4d1bcd09 KB |
374 | static int |
375 | open_with_retry (const char *pathname, int flags) | |
376 | { | |
377 | int retries_remaining, status; | |
378 | ||
379 | retries_remaining = 2; | |
380 | ||
381 | while (1) | |
382 | { | |
383 | status = open (pathname, flags); | |
384 | ||
385 | if (status >= 0 || retries_remaining == 0) | |
386 | break; | |
387 | else if (errno != EINTR && errno != EAGAIN) | |
388 | { | |
389 | retries_remaining--; | |
390 | sleep (1); | |
391 | } | |
392 | } | |
393 | ||
394 | return status; | |
395 | } | |
396 | ||
44122162 RO |
397 | /* Open the file descriptor for the process or LWP. We only open the |
398 | control file descriptor; the others are opened lazily as needed. | |
77382aee | 399 | Returns the file descriptor, or zero for failure. */ |
c906108c | 400 | |
c3f6f71d | 401 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 402 | |
c3f6f71d | 403 | static int |
fba45db2 | 404 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d JM |
405 | { |
406 | char tmp[MAX_PROC_NAME_SIZE]; | |
407 | int fd; | |
408 | ||
77382aee PA |
409 | /* This function is getting ALMOST long enough to break up into |
410 | several. Here is some rationale: | |
411 | ||
77382aee PA |
412 | There are several file descriptors that may need to be open |
413 | for any given process or LWP. The ones we're intereted in are: | |
414 | - control (ctl) write-only change the state | |
415 | - status (status) read-only query the state | |
416 | - address space (as) read/write access memory | |
417 | - map (map) read-only virtual addr map | |
418 | Most of these are opened lazily as they are needed. | |
419 | The pathnames for the 'files' for an LWP look slightly | |
420 | different from those of a first-class process: | |
421 | Pathnames for a process (<proc-id>): | |
422 | /proc/<proc-id>/ctl | |
423 | /proc/<proc-id>/status | |
424 | /proc/<proc-id>/as | |
425 | /proc/<proc-id>/map | |
426 | Pathnames for an LWP (lwp-id): | |
427 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
428 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
429 | An LWP has no map or address space file descriptor, since | |
44122162 RO |
430 | the memory map and address space are shared by all LWPs. */ |
431 | ||
77382aee PA |
432 | /* In this case, there are several different file descriptors that |
433 | we might be asked to open. The control file descriptor will be | |
434 | opened early, but the others will be opened lazily as they are | |
435 | needed. */ | |
c3f6f71d JM |
436 | |
437 | strcpy (tmp, pi->pathname); | |
0df8b418 | 438 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
439 | case FD_CTL: |
440 | if (pi->tid) | |
441 | strcat (tmp, "/lwpctl"); | |
442 | else | |
443 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 444 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 445 | if (fd < 0) |
c3f6f71d JM |
446 | return 0; /* fail */ |
447 | pi->ctl_fd = fd; | |
448 | break; | |
449 | case FD_AS: | |
450 | if (pi->tid) | |
0df8b418 | 451 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 452 | strcat (tmp, "/as"); |
4d1bcd09 | 453 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 454 | if (fd < 0) |
c3f6f71d JM |
455 | return 0; /* fail */ |
456 | pi->as_fd = fd; | |
457 | break; | |
458 | case FD_STATUS: | |
459 | if (pi->tid) | |
460 | strcat (tmp, "/lwpstatus"); | |
461 | else | |
462 | strcat (tmp, "/status"); | |
4d1bcd09 | 463 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 464 | if (fd < 0) |
c3f6f71d JM |
465 | return 0; /* fail */ |
466 | pi->status_fd = fd; | |
467 | break; | |
468 | default: | |
469 | return 0; /* unknown file descriptor */ | |
470 | } | |
c906108c | 471 | |
c3f6f71d JM |
472 | return 1; /* success */ |
473 | } | |
c906108c | 474 | |
77382aee PA |
475 | /* Allocate a data structure and link it into the procinfo list. |
476 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
477 | pointer to new procinfo struct. */ | |
c906108c | 478 | |
c3f6f71d | 479 | static procinfo * |
fba45db2 | 480 | create_procinfo (int pid, int tid) |
c3f6f71d | 481 | { |
0b62613e | 482 | procinfo *pi, *parent = NULL; |
c906108c | 483 | |
0d06e24b | 484 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 485 | return pi; /* Already exists, nothing to do. */ |
c906108c | 486 | |
0df8b418 | 487 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
488 | if (tid != 0) |
489 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
490 | create it if it | |
0df8b418 | 491 | doesn't exist yet? */ |
c906108c | 492 | |
8d749320 | 493 | pi = XNEW (procinfo); |
c3f6f71d JM |
494 | memset (pi, 0, sizeof (procinfo)); |
495 | pi->pid = pid; | |
496 | pi->tid = tid; | |
c906108c | 497 | |
1d5e0602 KB |
498 | pi->saved_entryset = sysset_t_alloc (pi); |
499 | pi->saved_exitset = sysset_t_alloc (pi); | |
500 | ||
c3f6f71d JM |
501 | /* Chain into list. */ |
502 | if (tid == 0) | |
503 | { | |
504 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
505 | pi->next = procinfo_list; | |
506 | procinfo_list = pi; | |
507 | } | |
508 | else | |
509 | { | |
c3f6f71d | 510 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); |
c3f6f71d JM |
511 | pi->next = parent->thread_list; |
512 | parent->thread_list = pi; | |
513 | } | |
514 | return pi; | |
515 | } | |
c906108c | 516 | |
77382aee | 517 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 518 | |
c3f6f71d | 519 | static void |
fba45db2 | 520 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
521 | { |
522 | if (pi->ctl_fd > 0) | |
523 | close (pi->ctl_fd); | |
c3f6f71d JM |
524 | if (pi->as_fd > 0) |
525 | close (pi->as_fd); | |
526 | if (pi->status_fd > 0) | |
527 | close (pi->status_fd); | |
c3f6f71d JM |
528 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
529 | } | |
c906108c | 530 | |
77382aee | 531 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 532 | |
c3f6f71d | 533 | static void |
fba45db2 | 534 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
535 | { |
536 | procinfo *ptr; | |
537 | ||
77382aee | 538 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
539 | if (pi == *list) |
540 | *list = pi->next; | |
19958708 | 541 | else |
c3f6f71d JM |
542 | for (ptr = *list; ptr; ptr = ptr->next) |
543 | if (ptr->next == pi) | |
544 | { | |
545 | ptr->next = pi->next; | |
546 | break; | |
547 | } | |
7a292a7a | 548 | |
77382aee | 549 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 550 | close_procinfo_files (pi); |
7a292a7a | 551 | |
77382aee | 552 | /* Step three: free the memory. */ |
1d5e0602 KB |
553 | xfree (pi->saved_entryset); |
554 | xfree (pi->saved_exitset); | |
b8c9b27d | 555 | xfree (pi); |
c3f6f71d | 556 | } |
c906108c | 557 | |
c3f6f71d | 558 | static void |
fba45db2 | 559 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
560 | { |
561 | procinfo *tmp; | |
c906108c | 562 | |
0df8b418 | 563 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 564 | { |
0df8b418 | 565 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
566 | destroy_one_procinfo (&tmp->thread_list, pi); |
567 | } | |
0df8b418 | 568 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
569 | { |
570 | /* First destroy the children, if any; */ | |
571 | while (pi->thread_list != NULL) | |
572 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
573 | /* Then destroy the parent. Genocide!!! */ | |
574 | destroy_one_procinfo (&procinfo_list, pi); | |
575 | } | |
576 | } | |
c906108c | 577 | |
004527cb AC |
578 | static void |
579 | do_destroy_procinfo_cleanup (void *pi) | |
580 | { | |
b196bc4c | 581 | destroy_procinfo ((procinfo *) pi); |
004527cb AC |
582 | } |
583 | ||
c3f6f71d | 584 | enum { NOKILL, KILL }; |
c906108c | 585 | |
77382aee PA |
586 | /* To be called on a non_recoverable error for a procinfo. Prints |
587 | error messages, optionally sends a SIGKILL to the process, then | |
588 | destroys the data structure. */ | |
c906108c | 589 | |
c3f6f71d | 590 | static void |
995816ba | 591 | dead_procinfo (procinfo *pi, const char *msg, int kill_p) |
c3f6f71d JM |
592 | { |
593 | char procfile[80]; | |
c906108c | 594 | |
c3f6f71d JM |
595 | if (pi->pathname) |
596 | { | |
597 | print_sys_errmsg (pi->pathname, errno); | |
598 | } | |
599 | else | |
600 | { | |
601 | sprintf (procfile, "process %d", pi->pid); | |
602 | print_sys_errmsg (procfile, errno); | |
603 | } | |
604 | if (kill_p == KILL) | |
605 | kill (pi->pid, SIGKILL); | |
c906108c | 606 | |
c3f6f71d | 607 | destroy_procinfo (pi); |
0b62613e | 608 | error ("%s", msg); |
c3f6f71d | 609 | } |
c906108c | 610 | |
77382aee | 611 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
612 | |
613 | static sysset_t * | |
44122162 | 614 | sysset_t_alloc (procinfo *pi) |
37de36c6 | 615 | { |
44122162 | 616 | return (sysset_t *) xmalloc (sizeof (sysset_t)); |
37de36c6 KB |
617 | } |
618 | ||
c3f6f71d | 619 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 620 | |
c3f6f71d | 621 | /* =================== /proc "MODULE" =================== */ |
c906108c | 622 | |
77382aee PA |
623 | /* This "module" is the interface layer between the /proc system API |
624 | and the gdb target vector functions. This layer consists of access | |
625 | functions that encapsulate each of the basic operations that we | |
626 | need to use from the /proc API. | |
627 | ||
628 | The main motivation for this layer is to hide the fact that there | |
629 | are two very different implementations of the /proc API. Rather | |
630 | than have a bunch of #ifdefs all thru the gdb target vector | |
631 | functions, we do our best to hide them all in here. */ | |
c906108c | 632 | |
44122162 RO |
633 | static long proc_flags (procinfo *pi); |
634 | static int proc_why (procinfo *pi); | |
635 | static int proc_what (procinfo *pi); | |
636 | static int proc_set_current_signal (procinfo *pi, int signo); | |
637 | static int proc_get_current_thread (procinfo *pi); | |
d3581e61 | 638 | static int proc_iterate_over_threads |
44122162 | 639 | (procinfo *pi, |
d3581e61 JB |
640 | int (*func) (procinfo *, procinfo *, void *), |
641 | void *ptr); | |
642 | ||
643 | static void | |
995816ba | 644 | proc_warn (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
645 | { |
646 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
647 | print_sys_errmsg (errmsg, errno); | |
648 | } | |
c906108c | 649 | |
d3581e61 | 650 | static void |
995816ba | 651 | proc_error (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
652 | { |
653 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
654 | perror_with_name (errmsg); | |
655 | } | |
c906108c | 656 | |
77382aee PA |
657 | /* Updates the status struct in the procinfo. There is a 'valid' |
658 | flag, to let other functions know when this function needs to be | |
659 | called (so the status is only read when it is needed). The status | |
660 | file descriptor is also only opened when it is needed. Returns | |
661 | non-zero for success, zero for failure. */ | |
c906108c | 662 | |
d3581e61 | 663 | static int |
fba45db2 | 664 | proc_get_status (procinfo *pi) |
c3f6f71d | 665 | { |
0df8b418 | 666 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
667 | if (pi->status_fd == 0 && |
668 | open_procinfo_files (pi, FD_STATUS) == 0) | |
669 | { | |
670 | pi->status_valid = 0; | |
671 | return 0; | |
672 | } | |
c906108c | 673 | |
c3f6f71d JM |
674 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
675 | pi->status_valid = 0; /* fail */ | |
676 | else | |
677 | { | |
19958708 | 678 | /* Sigh... I have to read a different data structure, |
0df8b418 | 679 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 680 | if (pi->tid) |
19958708 RM |
681 | pi->status_valid = (read (pi->status_fd, |
682 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
683 | sizeof (lwpstatus_t)) |
684 | == sizeof (lwpstatus_t)); | |
685 | else | |
686 | { | |
19958708 | 687 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d | 688 | (char *) &pi->prstatus, |
44122162 RO |
689 | sizeof (pstatus_t)) |
690 | == sizeof (pstatus_t)); | |
c3f6f71d JM |
691 | } |
692 | } | |
c906108c | 693 | |
c3f6f71d JM |
694 | if (pi->status_valid) |
695 | { | |
19958708 | 696 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 697 | proc_why (pi), |
19958708 | 698 | proc_what (pi), |
c3f6f71d JM |
699 | proc_get_current_thread (pi)); |
700 | } | |
c906108c | 701 | |
77382aee | 702 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d | 703 | pi->gregs_valid = pi->status_valid; |
77382aee PA |
704 | /* In the read/write multiple-fd model, the status struct includes |
705 | the fp regs too, so mark them valid too. */ | |
c3f6f71d | 706 | pi->fpregs_valid = pi->status_valid; |
77382aee | 707 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 708 | } |
c906108c | 709 | |
77382aee | 710 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 711 | |
d3581e61 | 712 | static long |
fba45db2 | 713 | proc_flags (procinfo *pi) |
c3f6f71d JM |
714 | { |
715 | if (!pi->status_valid) | |
716 | if (!proc_get_status (pi)) | |
0df8b418 | 717 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 718 | |
c3f6f71d | 719 | return pi->prstatus.pr_lwp.pr_flags; |
c3f6f71d | 720 | } |
c906108c | 721 | |
77382aee | 722 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 723 | |
d3581e61 | 724 | static int |
fba45db2 | 725 | proc_why (procinfo *pi) |
c3f6f71d JM |
726 | { |
727 | if (!pi->status_valid) | |
728 | if (!proc_get_status (pi)) | |
0df8b418 | 729 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 730 | |
c3f6f71d | 731 | return pi->prstatus.pr_lwp.pr_why; |
c3f6f71d | 732 | } |
c906108c | 733 | |
77382aee | 734 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 735 | |
d3581e61 | 736 | static int |
fba45db2 | 737 | proc_what (procinfo *pi) |
c3f6f71d JM |
738 | { |
739 | if (!pi->status_valid) | |
740 | if (!proc_get_status (pi)) | |
0df8b418 | 741 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 742 | |
c3f6f71d | 743 | return pi->prstatus.pr_lwp.pr_what; |
c3f6f71d | 744 | } |
c906108c | 745 | |
77382aee PA |
746 | /* This function is only called when PI is stopped by a watchpoint. |
747 | Assuming the OS supports it, write to *ADDR the data address which | |
748 | triggered it and return 1. Return 0 if it is not possible to know | |
749 | the address. */ | |
bf701c2c PM |
750 | |
751 | static int | |
752 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
753 | { | |
754 | if (!pi->status_valid) | |
755 | if (!proc_get_status (pi)) | |
756 | return 0; | |
757 | ||
f5656ead TT |
758 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
759 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c | 760 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
bf701c2c PM |
761 | return 1; |
762 | } | |
763 | ||
77382aee PA |
764 | /* Returns the pr_nsysarg field (number of args to the current |
765 | syscall). */ | |
c3f6f71d | 766 | |
d3581e61 | 767 | static int |
fba45db2 | 768 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
769 | { |
770 | if (!pi->status_valid) | |
771 | if (!proc_get_status (pi)) | |
772 | return 0; | |
19958708 | 773 | |
c3f6f71d | 774 | return pi->prstatus.pr_lwp.pr_nsysarg; |
c3f6f71d | 775 | } |
c906108c | 776 | |
77382aee PA |
777 | /* Returns the pr_sysarg field (pointer to the arguments of current |
778 | syscall). */ | |
c906108c | 779 | |
d3581e61 | 780 | static long * |
fba45db2 | 781 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
782 | { |
783 | if (!pi->status_valid) | |
784 | if (!proc_get_status (pi)) | |
785 | return NULL; | |
19958708 | 786 | |
c3f6f71d | 787 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
c3f6f71d | 788 | } |
77382aee | 789 | |
44122162 | 790 | /* Set or reset any of the following process flags: |
77382aee PA |
791 | PR_FORK -- forked child will inherit trace flags |
792 | PR_RLC -- traced process runs when last /proc file closed. | |
793 | PR_KLC -- traced process is killed when last /proc file closed. | |
794 | PR_ASYNC -- LWP's get to run/stop independently. | |
795 | ||
44122162 | 796 | This function is done using read/write [PCSET/PCRESET/PCUNSET]. |
77382aee PA |
797 | |
798 | Arguments: | |
799 | pi -- the procinfo | |
800 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
801 | mode -- 1 for set, 0 for reset. | |
802 | ||
803 | Returns non-zero for success, zero for failure. */ | |
c906108c | 804 | |
c3f6f71d | 805 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 806 | |
c3f6f71d | 807 | static int |
fba45db2 | 808 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
809 | { |
810 | long win = 0; /* default to fail */ | |
811 | ||
77382aee PA |
812 | /* These operations affect the process as a whole, and applying them |
813 | to an individual LWP has the same meaning as applying them to the | |
814 | main process. Therefore, if we're ever called with a pointer to | |
815 | an LWP's procinfo, let's substitute the process's procinfo and | |
816 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
817 | |
818 | if (pi->pid != 0) | |
819 | pi = find_procinfo_or_die (pi->pid, 0); | |
820 | ||
44122162 | 821 | procfs_ctl_t arg[2]; |
c5aa993b | 822 | |
44122162 RO |
823 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
824 | arg[0] = PCSET; | |
0df8b418 | 825 | else /* Reset the flag. */ |
44122162 RO |
826 | arg[0] = PCUNSET; |
827 | ||
828 | arg[1] = flag; | |
829 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 830 | |
77382aee PA |
831 | /* The above operation renders the procinfo's cached pstatus |
832 | obsolete. */ | |
c3f6f71d | 833 | pi->status_valid = 0; |
c906108c | 834 | |
c3f6f71d | 835 | if (!win) |
8a3fe4f8 | 836 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
837 | flag == PR_FORK ? "PR_FORK" : |
838 | flag == PR_RLC ? "PR_RLC" : | |
c3f6f71d | 839 | flag == PR_ASYNC ? "PR_ASYNC" : |
0d06e24b | 840 | flag == PR_KLC ? "PR_KLC" : |
c3f6f71d JM |
841 | "<unknown flag>", |
842 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 843 | |
c3f6f71d JM |
844 | return win; |
845 | } | |
c906108c | 846 | |
77382aee PA |
847 | /* Set the run_on_last_close flag. Process with all threads will |
848 | become runnable when debugger closes all /proc fds. Returns | |
849 | non-zero for success, zero for failure. */ | |
c906108c | 850 | |
d3581e61 | 851 | static int |
fba45db2 | 852 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 853 | { |
c3f6f71d JM |
854 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
855 | } | |
c906108c | 856 | |
77382aee PA |
857 | /* Reset the run_on_last_close flag. The process will NOT become |
858 | runnable when debugger closes its file handles. Returns non-zero | |
859 | for success, zero for failure. */ | |
c906108c | 860 | |
d3581e61 | 861 | static int |
fba45db2 | 862 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
863 | { |
864 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
865 | } |
866 | ||
77382aee PA |
867 | /* Reset inherit_on_fork flag. If the process forks a child while we |
868 | are registered for events in the parent, then we will NOT recieve | |
869 | events from the child. Returns non-zero for success, zero for | |
870 | failure. */ | |
c906108c | 871 | |
d3581e61 | 872 | static int |
fba45db2 | 873 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
874 | { |
875 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
876 | } | |
c906108c | 877 | |
77382aee PA |
878 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
879 | (signal etc.), the remaining LWPs will continue to run. Returns | |
880 | non-zero for success, zero for failure. */ | |
c906108c | 881 | |
d3581e61 | 882 | static int |
fba45db2 | 883 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
884 | { |
885 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
886 | } | |
c906108c | 887 | |
77382aee PA |
888 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
889 | (signal etc.), then all other LWPs will stop as well. Returns | |
890 | non-zero for success, zero for failure. */ | |
c906108c | 891 | |
d3581e61 | 892 | static int |
fba45db2 | 893 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
894 | { |
895 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
896 | } | |
c906108c | 897 | |
77382aee PA |
898 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
899 | for success, zero for failure. */ | |
c906108c | 900 | |
d3581e61 | 901 | static int |
fba45db2 | 902 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
903 | { |
904 | int win; | |
c906108c | 905 | |
77382aee PA |
906 | /* We might conceivably apply this operation to an LWP, and the |
907 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 908 | |
c3f6f71d JM |
909 | if (pi->ctl_fd == 0 && |
910 | open_procinfo_files (pi, FD_CTL) == 0) | |
911 | return 0; | |
912 | else | |
913 | { | |
37de36c6 | 914 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 915 | |
c3f6f71d | 916 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d | 917 | } |
c906108c | 918 | |
c3f6f71d JM |
919 | return win; |
920 | } | |
c5aa993b | 921 | |
77382aee PA |
922 | /* Wait for the process or LWP to stop (block until it does). Returns |
923 | non-zero for success, zero for failure. */ | |
c906108c | 924 | |
d3581e61 | 925 | static int |
fba45db2 | 926 | proc_wait_for_stop (procinfo *pi) |
c906108c | 927 | { |
c3f6f71d JM |
928 | int win; |
929 | ||
77382aee PA |
930 | /* We should never have to apply this operation to any procinfo |
931 | except the one for the main process. If that ever changes for | |
932 | any reason, then take out the following clause and replace it | |
933 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 934 | |
c3f6f71d JM |
935 | if (pi->tid != 0) |
936 | pi = find_procinfo_or_die (pi->pid, 0); | |
937 | ||
44122162 | 938 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 939 | |
44122162 RO |
940 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
941 | /* We been runnin' and we stopped -- need to update status. */ | |
942 | pi->status_valid = 0; | |
c906108c | 943 | |
c3f6f71d | 944 | return win; |
c906108c SS |
945 | } |
946 | ||
77382aee PA |
947 | /* Make the process or LWP runnable. |
948 | ||
949 | Options (not all are implemented): | |
950 | - single-step | |
951 | - clear current fault | |
952 | - clear current signal | |
953 | - abort the current system call | |
954 | - stop as soon as finished with system call | |
955 | - (ioctl): set traced signal set | |
956 | - (ioctl): set held signal set | |
957 | - (ioctl): set traced fault set | |
958 | - (ioctl): set start pc (vaddr) | |
959 | ||
960 | Always clears the current fault. PI is the process or LWP to | |
961 | operate on. If STEP is true, set the process or LWP to trap after | |
962 | one instruction. If SIGNO is zero, clear the current signal if | |
963 | any; if non-zero, set the current signal to this one. Returns | |
964 | non-zero for success, zero for failure. */ | |
c3f6f71d | 965 | |
d3581e61 | 966 | static int |
fba45db2 | 967 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
968 | { |
969 | int win; | |
970 | int runflags; | |
971 | ||
77382aee PA |
972 | /* We will probably have to apply this operation to individual |
973 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 974 | |
c3f6f71d JM |
975 | if (pi->ctl_fd == 0 && |
976 | open_procinfo_files (pi, FD_CTL) == 0) | |
977 | { | |
978 | return 0; | |
979 | } | |
c906108c | 980 | |
0df8b418 | 981 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
982 | if (step) |
983 | runflags |= PRSTEP; | |
984 | if (signo == 0) | |
985 | runflags |= PRCSIG; | |
0df8b418 | 986 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 987 | proc_set_current_signal (pi, signo); |
c5aa993b | 988 | |
44122162 | 989 | procfs_ctl_t cmd[2]; |
c906108c | 990 | |
44122162 RO |
991 | cmd[0] = PCRUN; |
992 | cmd[1] = runflags; | |
993 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c906108c | 994 | |
c3f6f71d JM |
995 | return win; |
996 | } | |
c906108c | 997 | |
77382aee PA |
998 | /* Register to trace signals in the process or LWP. Returns non-zero |
999 | for success, zero for failure. */ | |
c906108c | 1000 | |
d3581e61 | 1001 | static int |
44122162 | 1002 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 1003 | { |
c3f6f71d JM |
1004 | int win; |
1005 | ||
77382aee PA |
1006 | /* We should never have to apply this operation to any procinfo |
1007 | except the one for the main process. If that ever changes for | |
1008 | any reason, then take out the following clause and replace it | |
1009 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1010 | |
c3f6f71d JM |
1011 | if (pi->tid != 0) |
1012 | pi = find_procinfo_or_die (pi->pid, 0); | |
1013 | ||
44122162 RO |
1014 | struct { |
1015 | procfs_ctl_t cmd; | |
1016 | /* Use char array to avoid alignment issues. */ | |
1017 | char sigset[sizeof (sigset_t)]; | |
1018 | } arg; | |
c906108c | 1019 | |
44122162 RO |
1020 | arg.cmd = PCSTRACE; |
1021 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
1022 | ||
1023 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1024 | |
0df8b418 | 1025 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1026 | pi->status_valid = 0; |
c906108c | 1027 | |
c3f6f71d | 1028 | if (!win) |
8a3fe4f8 | 1029 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1030 | return win; |
c906108c SS |
1031 | } |
1032 | ||
77382aee PA |
1033 | /* Register to trace hardware faults in the process or LWP. Returns |
1034 | non-zero for success, zero for failure. */ | |
c906108c | 1035 | |
d3581e61 | 1036 | static int |
fba45db2 | 1037 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1038 | { |
1039 | int win; | |
1040 | ||
77382aee PA |
1041 | /* We should never have to apply this operation to any procinfo |
1042 | except the one for the main process. If that ever changes for | |
1043 | any reason, then take out the following clause and replace it | |
1044 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1045 | |
c3f6f71d JM |
1046 | if (pi->tid != 0) |
1047 | pi = find_procinfo_or_die (pi->pid, 0); | |
1048 | ||
44122162 RO |
1049 | struct { |
1050 | procfs_ctl_t cmd; | |
1051 | /* Use char array to avoid alignment issues. */ | |
1052 | char fltset[sizeof (fltset_t)]; | |
1053 | } arg; | |
1054 | ||
1055 | arg.cmd = PCSFAULT; | |
1056 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1057 | |
44122162 | 1058 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
c906108c | 1059 | |
0df8b418 | 1060 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1061 | pi->status_valid = 0; |
c906108c | 1062 | |
c3f6f71d JM |
1063 | return win; |
1064 | } | |
c5aa993b | 1065 | |
77382aee PA |
1066 | /* Register to trace entry to system calls in the process or LWP. |
1067 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1068 | |
d3581e61 | 1069 | static int |
fba45db2 | 1070 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1071 | { |
c3f6f71d JM |
1072 | int win; |
1073 | ||
77382aee PA |
1074 | /* We should never have to apply this operation to any procinfo |
1075 | except the one for the main process. If that ever changes for | |
1076 | any reason, then take out the following clause and replace it | |
1077 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1078 | |
c3f6f71d JM |
1079 | if (pi->tid != 0) |
1080 | pi = find_procinfo_or_die (pi->pid, 0); | |
1081 | ||
44122162 RO |
1082 | struct gdb_proc_ctl_pcsentry { |
1083 | procfs_ctl_t cmd; | |
1084 | /* Use char array to avoid alignment issues. */ | |
1085 | char sysset[sizeof (sysset_t)]; | |
1086 | } *argp; | |
1087 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry); | |
c3f6f71d | 1088 | |
44122162 | 1089 | argp = (struct gdb_proc_ctl_pcsentry *) xmalloc (argp_size); |
c3f6f71d | 1090 | |
44122162 RO |
1091 | argp->cmd = PCSENTRY; |
1092 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
1093 | ||
1094 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1095 | xfree (argp); | |
37de36c6 | 1096 | |
77382aee PA |
1097 | /* The above operation renders the procinfo's cached pstatus |
1098 | obsolete. */ | |
c3f6f71d | 1099 | pi->status_valid = 0; |
19958708 | 1100 | |
c3f6f71d | 1101 | return win; |
c906108c SS |
1102 | } |
1103 | ||
77382aee PA |
1104 | /* Register to trace exit from system calls in the process or LWP. |
1105 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1106 | |
d3581e61 | 1107 | static int |
fba45db2 | 1108 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1109 | { |
1110 | int win; | |
1111 | ||
77382aee PA |
1112 | /* We should never have to apply this operation to any procinfo |
1113 | except the one for the main process. If that ever changes for | |
1114 | any reason, then take out the following clause and replace it | |
1115 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1116 | |
c3f6f71d JM |
1117 | if (pi->tid != 0) |
1118 | pi = find_procinfo_or_die (pi->pid, 0); | |
1119 | ||
44122162 RO |
1120 | struct gdb_proc_ctl_pcsexit { |
1121 | procfs_ctl_t cmd; | |
1122 | /* Use char array to avoid alignment issues. */ | |
1123 | char sysset[sizeof (sysset_t)]; | |
1124 | } *argp; | |
1125 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit); | |
1126 | ||
1127 | argp = (struct gdb_proc_ctl_pcsexit *) xmalloc (argp_size); | |
c906108c | 1128 | |
44122162 RO |
1129 | argp->cmd = PCSEXIT; |
1130 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1131 | |
44122162 RO |
1132 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
1133 | xfree (argp); | |
37de36c6 | 1134 | |
77382aee PA |
1135 | /* The above operation renders the procinfo's cached pstatus |
1136 | obsolete. */ | |
c3f6f71d | 1137 | pi->status_valid = 0; |
c906108c | 1138 | |
c3f6f71d JM |
1139 | return win; |
1140 | } | |
c906108c | 1141 | |
77382aee PA |
1142 | /* Specify the set of blocked / held signals in the process or LWP. |
1143 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1144 | |
d3581e61 | 1145 | static int |
44122162 | 1146 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1147 | { |
c3f6f71d JM |
1148 | int win; |
1149 | ||
77382aee PA |
1150 | /* We should never have to apply this operation to any procinfo |
1151 | except the one for the main process. If that ever changes for | |
1152 | any reason, then take out the following clause and replace it | |
1153 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1154 | |
c3f6f71d JM |
1155 | if (pi->tid != 0) |
1156 | pi = find_procinfo_or_die (pi->pid, 0); | |
1157 | ||
44122162 RO |
1158 | struct { |
1159 | procfs_ctl_t cmd; | |
1160 | /* Use char array to avoid alignment issues. */ | |
1161 | char hold[sizeof (sigset_t)]; | |
1162 | } arg; | |
1163 | ||
1164 | arg.cmd = PCSHOLD; | |
1165 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1166 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1167 | ||
77382aee PA |
1168 | /* The above operation renders the procinfo's cached pstatus |
1169 | obsolete. */ | |
c3f6f71d JM |
1170 | pi->status_valid = 0; |
1171 | ||
1172 | return win; | |
c906108c SS |
1173 | } |
1174 | ||
77382aee PA |
1175 | /* Returns the set of signals that are held / blocked. Will also copy |
1176 | the sigset if SAVE is non-zero. */ | |
c906108c | 1177 | |
44122162 RO |
1178 | static sigset_t * |
1179 | proc_get_held_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1180 | { |
44122162 | 1181 | sigset_t *ret = NULL; |
c3f6f71d | 1182 | |
77382aee PA |
1183 | /* We should never have to apply this operation to any procinfo |
1184 | except the one for the main process. If that ever changes for | |
1185 | any reason, then take out the following clause and replace it | |
1186 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1187 | |
c3f6f71d JM |
1188 | if (pi->tid != 0) |
1189 | pi = find_procinfo_or_die (pi->pid, 0); | |
1190 | ||
c3f6f71d JM |
1191 | if (!pi->status_valid) |
1192 | if (!proc_get_status (pi)) | |
1193 | return NULL; | |
1194 | ||
c3f6f71d | 1195 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d | 1196 | if (save && ret) |
44122162 | 1197 | memcpy (save, ret, sizeof (sigset_t)); |
c3f6f71d JM |
1198 | |
1199 | return ret; | |
c906108c SS |
1200 | } |
1201 | ||
77382aee PA |
1202 | /* Returns the set of signals that are traced / debugged. Will also |
1203 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1204 | |
44122162 RO |
1205 | static sigset_t * |
1206 | proc_get_traced_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1207 | { |
44122162 | 1208 | sigset_t *ret = NULL; |
c3f6f71d | 1209 | |
77382aee PA |
1210 | /* We should never have to apply this operation to any procinfo |
1211 | except the one for the main process. If that ever changes for | |
1212 | any reason, then take out the following clause and replace it | |
1213 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1214 | |
c3f6f71d JM |
1215 | if (pi->tid != 0) |
1216 | pi = find_procinfo_or_die (pi->pid, 0); | |
1217 | ||
c3f6f71d JM |
1218 | if (!pi->status_valid) |
1219 | if (!proc_get_status (pi)) | |
1220 | return NULL; | |
1221 | ||
1222 | ret = &pi->prstatus.pr_sigtrace; | |
c3f6f71d | 1223 | if (save && ret) |
44122162 | 1224 | memcpy (save, ret, sizeof (sigset_t)); |
c906108c | 1225 | |
c3f6f71d JM |
1226 | return ret; |
1227 | } | |
c906108c | 1228 | |
77382aee PA |
1229 | /* Returns the set of hardware faults that are traced /debugged. Will |
1230 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1231 | |
d3581e61 | 1232 | static fltset_t * |
fba45db2 | 1233 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1234 | { |
1235 | fltset_t *ret = NULL; | |
1236 | ||
77382aee PA |
1237 | /* We should never have to apply this operation to any procinfo |
1238 | except the one for the main process. If that ever changes for | |
1239 | any reason, then take out the following clause and replace it | |
1240 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1241 | |
c3f6f71d JM |
1242 | if (pi->tid != 0) |
1243 | pi = find_procinfo_or_die (pi->pid, 0); | |
1244 | ||
c3f6f71d JM |
1245 | if (!pi->status_valid) |
1246 | if (!proc_get_status (pi)) | |
1247 | return NULL; | |
1248 | ||
1249 | ret = &pi->prstatus.pr_flttrace; | |
c3f6f71d JM |
1250 | if (save && ret) |
1251 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1252 | |
c3f6f71d JM |
1253 | return ret; |
1254 | } | |
c906108c | 1255 | |
77382aee PA |
1256 | /* Returns the set of syscalls that are traced /debugged on entry. |
1257 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1258 | |
d3581e61 | 1259 | static sysset_t * |
fba45db2 | 1260 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1261 | { |
1262 | sysset_t *ret = NULL; | |
1263 | ||
77382aee PA |
1264 | /* We should never have to apply this operation to any procinfo |
1265 | except the one for the main process. If that ever changes for | |
1266 | any reason, then take out the following clause and replace it | |
1267 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1268 | |
c3f6f71d JM |
1269 | if (pi->tid != 0) |
1270 | pi = find_procinfo_or_die (pi->pid, 0); | |
1271 | ||
c3f6f71d JM |
1272 | if (!pi->status_valid) |
1273 | if (!proc_get_status (pi)) | |
1274 | return NULL; | |
1275 | ||
1276 | ret = &pi->prstatus.pr_sysentry; | |
c3f6f71d | 1277 | if (save && ret) |
44122162 | 1278 | memcpy (save, ret, sizeof (sysset_t)); |
c906108c | 1279 | |
c3f6f71d JM |
1280 | return ret; |
1281 | } | |
c5aa993b | 1282 | |
77382aee PA |
1283 | /* Returns the set of syscalls that are traced /debugged on exit. |
1284 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1285 | |
d3581e61 | 1286 | static sysset_t * |
fba45db2 | 1287 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1288 | { |
44122162 | 1289 | sysset_t *ret = NULL; |
c3f6f71d | 1290 | |
77382aee PA |
1291 | /* We should never have to apply this operation to any procinfo |
1292 | except the one for the main process. If that ever changes for | |
1293 | any reason, then take out the following clause and replace it | |
1294 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1295 | |
c3f6f71d JM |
1296 | if (pi->tid != 0) |
1297 | pi = find_procinfo_or_die (pi->pid, 0); | |
1298 | ||
c3f6f71d JM |
1299 | if (!pi->status_valid) |
1300 | if (!proc_get_status (pi)) | |
1301 | return NULL; | |
1302 | ||
1303 | ret = &pi->prstatus.pr_sysexit; | |
c3f6f71d | 1304 | if (save && ret) |
44122162 | 1305 | memcpy (save, ret, sizeof (sysset_t)); |
c3f6f71d JM |
1306 | |
1307 | return ret; | |
1308 | } | |
c906108c | 1309 | |
77382aee PA |
1310 | /* The current fault (if any) is cleared; the associated signal will |
1311 | not be sent to the process or LWP when it resumes. Returns | |
1312 | non-zero for success, zero for failure. */ | |
c906108c | 1313 | |
d3581e61 | 1314 | static int |
fba45db2 | 1315 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
1316 | { |
1317 | int win; | |
1318 | ||
77382aee PA |
1319 | /* We should never have to apply this operation to any procinfo |
1320 | except the one for the main process. If that ever changes for | |
1321 | any reason, then take out the following clause and replace it | |
1322 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1323 | |
c3f6f71d JM |
1324 | if (pi->tid != 0) |
1325 | pi = find_procinfo_or_die (pi->pid, 0); | |
1326 | ||
44122162 | 1327 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 1328 | |
44122162 | 1329 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d JM |
1330 | |
1331 | return win; | |
c906108c SS |
1332 | } |
1333 | ||
77382aee PA |
1334 | /* Set the "current signal" that will be delivered next to the |
1335 | process. NOTE: semantics are different from those of KILL. This | |
1336 | signal will be delivered to the process or LWP immediately when it | |
1337 | is resumed (even if the signal is held/blocked); it will NOT | |
1338 | immediately cause another event of interest, and will NOT first | |
1339 | trap back to the debugger. Returns non-zero for success, zero for | |
1340 | failure. */ | |
c3f6f71d | 1341 | |
d3581e61 | 1342 | static int |
fba45db2 | 1343 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1344 | { |
1345 | int win; | |
1346 | struct { | |
37de36c6 | 1347 | procfs_ctl_t cmd; |
c3f6f71d | 1348 | /* Use char array to avoid alignment issues. */ |
44122162 | 1349 | char sinfo[sizeof (siginfo_t)]; |
c3f6f71d | 1350 | } arg; |
44122162 | 1351 | siginfo_t mysinfo; |
c162e8c9 JM |
1352 | ptid_t wait_ptid; |
1353 | struct target_waitstatus wait_status; | |
c3f6f71d | 1354 | |
77382aee PA |
1355 | /* We should never have to apply this operation to any procinfo |
1356 | except the one for the main process. If that ever changes for | |
1357 | any reason, then take out the following clause and replace it | |
1358 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1359 | |
c3f6f71d JM |
1360 | if (pi->tid != 0) |
1361 | pi = find_procinfo_or_die (pi->pid, 0); | |
1362 | ||
c3f6f71d | 1363 | /* The pointer is just a type alias. */ |
c162e8c9 JM |
1364 | get_last_target_status (&wait_ptid, &wait_status); |
1365 | if (ptid_equal (wait_ptid, inferior_ptid) | |
1366 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 1367 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 | 1368 | && proc_get_status (pi) |
c162e8c9 | 1369 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
c162e8c9 JM |
1370 | ) |
1371 | /* Use the siginfo associated with the signal being | |
1372 | redelivered. */ | |
44122162 | 1373 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (siginfo_t)); |
c162e8c9 JM |
1374 | else |
1375 | { | |
73930d4d KH |
1376 | mysinfo.si_signo = signo; |
1377 | mysinfo.si_code = 0; | |
1378 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1379 | mysinfo.si_uid = getuid (); /* ?why? */ | |
44122162 | 1380 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); |
c162e8c9 | 1381 | } |
c3f6f71d | 1382 | |
c3f6f71d JM |
1383 | arg.cmd = PCSSIG; |
1384 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1385 | |
c3f6f71d JM |
1386 | return win; |
1387 | } | |
c906108c | 1388 | |
77382aee PA |
1389 | /* The current signal (if any) is cleared, and is not sent to the |
1390 | process or LWP when it resumes. Returns non-zero for success, zero | |
1391 | for failure. */ | |
c906108c | 1392 | |
d3581e61 | 1393 | static int |
fba45db2 | 1394 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
1395 | { |
1396 | int win; | |
1397 | ||
77382aee PA |
1398 | /* We should never have to apply this operation to any procinfo |
1399 | except the one for the main process. If that ever changes for | |
1400 | any reason, then take out the following clause and replace it | |
1401 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1402 | |
c3f6f71d JM |
1403 | if (pi->tid != 0) |
1404 | pi = find_procinfo_or_die (pi->pid, 0); | |
1405 | ||
44122162 RO |
1406 | struct { |
1407 | procfs_ctl_t cmd; | |
1408 | /* Use char array to avoid alignment issues. */ | |
1409 | char sinfo[sizeof (siginfo_t)]; | |
1410 | } arg; | |
1411 | siginfo_t mysinfo; | |
1412 | ||
1413 | arg.cmd = PCSSIG; | |
1414 | /* The pointer is just a type alias. */ | |
1415 | mysinfo.si_signo = 0; | |
1416 | mysinfo.si_code = 0; | |
1417 | mysinfo.si_errno = 0; | |
1418 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1419 | mysinfo.si_uid = getuid (); /* ?why? */ | |
1420 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); | |
1421 | ||
1422 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1423 | |
c3f6f71d JM |
1424 | return win; |
1425 | } | |
c906108c | 1426 | |
772cf8be MK |
1427 | /* Return the general-purpose registers for the process or LWP |
1428 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1429 | |
d3581e61 | 1430 | static gdb_gregset_t * |
fba45db2 | 1431 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
1432 | { |
1433 | if (!pi->status_valid || !pi->gregs_valid) | |
1434 | if (!proc_get_status (pi)) | |
1435 | return NULL; | |
1436 | ||
c3f6f71d | 1437 | return &pi->prstatus.pr_lwp.pr_reg; |
c3f6f71d | 1438 | } |
c5aa993b | 1439 | |
772cf8be MK |
1440 | /* Return the general-purpose registers for the process or LWP |
1441 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1442 | |
d3581e61 | 1443 | static gdb_fpregset_t * |
fba45db2 | 1444 | proc_get_fpregs (procinfo *pi) |
c906108c | 1445 | { |
c3f6f71d JM |
1446 | if (!pi->status_valid || !pi->fpregs_valid) |
1447 | if (!proc_get_status (pi)) | |
1448 | return NULL; | |
1449 | ||
c3f6f71d | 1450 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c906108c SS |
1451 | } |
1452 | ||
772cf8be MK |
1453 | /* Write the general-purpose registers back to the process or LWP |
1454 | corresponding to PI. Return non-zero for success, zero for | |
1455 | failure. */ | |
c3f6f71d | 1456 | |
d3581e61 | 1457 | static int |
fba45db2 | 1458 | proc_set_gregs (procinfo *pi) |
c906108c | 1459 | { |
c3f6f71d JM |
1460 | gdb_gregset_t *gregs; |
1461 | int win; | |
c5aa993b | 1462 | |
772cf8be MK |
1463 | gregs = proc_get_gregs (pi); |
1464 | if (gregs == NULL) | |
1465 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 1466 | |
772cf8be | 1467 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1468 | { |
c3f6f71d | 1469 | return 0; |
c906108c | 1470 | } |
c3f6f71d | 1471 | else |
c906108c | 1472 | { |
c3f6f71d | 1473 | struct { |
37de36c6 | 1474 | procfs_ctl_t cmd; |
c3f6f71d JM |
1475 | /* Use char array to avoid alignment issues. */ |
1476 | char gregs[sizeof (gdb_gregset_t)]; | |
1477 | } arg; | |
1478 | ||
772cf8be | 1479 | arg.cmd = PCSREG; |
c3f6f71d JM |
1480 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
1481 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1482 | } |
c3f6f71d | 1483 | |
772cf8be | 1484 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1485 | pi->gregs_valid = 0; |
1486 | return win; | |
c906108c SS |
1487 | } |
1488 | ||
772cf8be MK |
1489 | /* Write the floating-pointer registers back to the process or LWP |
1490 | corresponding to PI. Return non-zero for success, zero for | |
1491 | failure. */ | |
c3f6f71d | 1492 | |
d3581e61 | 1493 | static int |
fba45db2 | 1494 | proc_set_fpregs (procinfo *pi) |
c906108c | 1495 | { |
c3f6f71d JM |
1496 | gdb_fpregset_t *fpregs; |
1497 | int win; | |
1498 | ||
772cf8be MK |
1499 | fpregs = proc_get_fpregs (pi); |
1500 | if (fpregs == NULL) | |
1501 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 1502 | |
772cf8be | 1503 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1504 | { |
c3f6f71d | 1505 | return 0; |
c906108c | 1506 | } |
c3f6f71d | 1507 | else |
c906108c | 1508 | { |
c3f6f71d | 1509 | struct { |
37de36c6 | 1510 | procfs_ctl_t cmd; |
c3f6f71d JM |
1511 | /* Use char array to avoid alignment issues. */ |
1512 | char fpregs[sizeof (gdb_fpregset_t)]; | |
1513 | } arg; | |
1514 | ||
772cf8be | 1515 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
1516 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
1517 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1518 | } |
c3f6f71d | 1519 | |
772cf8be | 1520 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1521 | pi->fpregs_valid = 0; |
1522 | return win; | |
c906108c SS |
1523 | } |
1524 | ||
77382aee PA |
1525 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
1526 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1527 | |
d3581e61 | 1528 | static int |
fba45db2 | 1529 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
1530 | { |
1531 | int win; | |
c906108c | 1532 | |
77382aee PA |
1533 | /* We might conceivably apply this operation to an LWP, and the |
1534 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1535 | |
c3f6f71d JM |
1536 | if (pi->ctl_fd == 0 && |
1537 | open_procinfo_files (pi, FD_CTL) == 0) | |
1538 | { | |
1539 | return 0; | |
1540 | } | |
1541 | else | |
1542 | { | |
37de36c6 | 1543 | procfs_ctl_t cmd[2]; |
c906108c | 1544 | |
c3f6f71d JM |
1545 | cmd[0] = PCKILL; |
1546 | cmd[1] = signo; | |
1547 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c3f6f71d | 1548 | } |
c906108c | 1549 | |
c3f6f71d JM |
1550 | return win; |
1551 | } | |
c906108c | 1552 | |
77382aee PA |
1553 | /* Find the pid of the process that started this one. Returns the |
1554 | parent process pid, or zero. */ | |
c906108c | 1555 | |
d3581e61 | 1556 | static int |
fba45db2 | 1557 | proc_parent_pid (procinfo *pi) |
c906108c | 1558 | { |
77382aee PA |
1559 | /* We should never have to apply this operation to any procinfo |
1560 | except the one for the main process. If that ever changes for | |
1561 | any reason, then take out the following clause and replace it | |
1562 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1563 | |
c3f6f71d JM |
1564 | if (pi->tid != 0) |
1565 | pi = find_procinfo_or_die (pi->pid, 0); | |
1566 | ||
1567 | if (!pi->status_valid) | |
1568 | if (!proc_get_status (pi)) | |
1569 | return 0; | |
c5aa993b | 1570 | |
c3f6f71d JM |
1571 | return pi->prstatus.pr_ppid; |
1572 | } | |
1573 | ||
9a043c1d AC |
1574 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
1575 | (a.k.a void pointer)! */ | |
1576 | ||
1577 | static void * | |
1578 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
1579 | { | |
f5656ead | 1580 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
1581 | void *ptr; |
1582 | ||
4e906f53 | 1583 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 1584 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 1585 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
1586 | return ptr; |
1587 | } | |
1588 | ||
a0911fd0 | 1589 | static int |
fba45db2 | 1590 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 1591 | { |
c3f6f71d | 1592 | struct { |
37de36c6 | 1593 | procfs_ctl_t cmd; |
c3f6f71d JM |
1594 | char watch[sizeof (prwatch_t)]; |
1595 | } arg; | |
73930d4d | 1596 | prwatch_t pwatch; |
c3f6f71d | 1597 | |
9a043c1d AC |
1598 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
1599 | convert a target address into something that can be stored in a | |
1600 | native data structure. */ | |
73930d4d | 1601 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
73930d4d KH |
1602 | pwatch.pr_size = len; |
1603 | pwatch.pr_wflags = wflags; | |
c3f6f71d | 1604 | arg.cmd = PCWATCH; |
73930d4d | 1605 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d | 1606 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
c906108c SS |
1607 | } |
1608 | ||
965b60ee | 1609 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 1610 | |
c3f6f71d | 1611 | #include <sys/sysi86.h> |
c906108c | 1612 | |
77382aee PA |
1613 | /* The KEY is actually the value of the lower 16 bits of the GS |
1614 | register for the LWP that we're interested in. Returns the | |
1615 | matching ssh struct (LDT entry). */ | |
c906108c | 1616 | |
337c776f | 1617 | static struct ssd * |
fba45db2 | 1618 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 1619 | { |
c3f6f71d | 1620 | static struct ssd *ldt_entry = NULL; |
c3f6f71d | 1621 | char pathname[MAX_PROC_NAME_SIZE]; |
c3f6f71d JM |
1622 | |
1623 | /* Allocate space for one LDT entry. | |
1624 | This alloc must persist, because we return a pointer to it. */ | |
1625 | if (ldt_entry == NULL) | |
8d749320 | 1626 | ldt_entry = XNEW (struct ssd); |
c3f6f71d JM |
1627 | |
1628 | /* Open the file descriptor for the LDT table. */ | |
1629 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
5dc1a704 TT |
1630 | scoped_fd fd (open_with_retry (pathname, O_RDONLY)); |
1631 | if (fd.get () < 0) | |
c906108c | 1632 | { |
c3f6f71d JM |
1633 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
1634 | return NULL; | |
c906108c SS |
1635 | } |
1636 | ||
c3f6f71d | 1637 | /* Now 'read' thru the table, find a match and return it. */ |
5dc1a704 TT |
1638 | while (read (fd.get (), ldt_entry, sizeof (struct ssd)) |
1639 | == sizeof (struct ssd)) | |
c906108c | 1640 | { |
c3f6f71d JM |
1641 | if (ldt_entry->sel == 0 && |
1642 | ldt_entry->bo == 0 && | |
1643 | ldt_entry->acc1 == 0 && | |
1644 | ldt_entry->acc2 == 0) | |
1645 | break; /* end of table */ | |
0df8b418 | 1646 | /* If key matches, return this entry. */ |
c3f6f71d | 1647 | if (ldt_entry->sel == key) |
70b33f19 | 1648 | return ldt_entry; |
c906108c | 1649 | } |
0df8b418 | 1650 | /* Loop ended, match not found. */ |
c3f6f71d | 1651 | return NULL; |
c3f6f71d | 1652 | } |
c906108c | 1653 | |
77382aee | 1654 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
1655 | |
1656 | struct ssd * | |
1657 | procfs_find_LDT_entry (ptid_t ptid) | |
1658 | { | |
1659 | gdb_gregset_t *gregs; | |
1660 | int key; | |
1661 | procinfo *pi; | |
1662 | ||
0df8b418 | 1663 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 1664 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 1665 | { |
0b62613e | 1666 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 1667 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1668 | return NULL; |
1669 | } | |
0df8b418 | 1670 | /* get its general registers. */ |
965b60ee JB |
1671 | if ((gregs = proc_get_gregs (pi)) == NULL) |
1672 | { | |
0b62613e | 1673 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 1674 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1675 | return NULL; |
1676 | } | |
0df8b418 | 1677 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
1678 | key = (*gregs)[GS] & 0xffff; |
1679 | ||
0df8b418 | 1680 | /* Find the matching entry and return it. */ |
965b60ee JB |
1681 | return proc_get_LDT_entry (pi, key); |
1682 | } | |
1683 | ||
1684 | #endif | |
c906108c | 1685 | |
c3f6f71d | 1686 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 1687 | |
c3f6f71d | 1688 | /* =================== Thread "MODULE" =================== */ |
c906108c | 1689 | |
44122162 RO |
1690 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
1691 | since there is a different way to do threads on every OS. */ | |
c906108c | 1692 | |
44122162 | 1693 | /* Returns the number of threads for the process. */ |
c906108c | 1694 | |
d3581e61 | 1695 | static int |
fba45db2 | 1696 | proc_get_nthreads (procinfo *pi) |
c906108c | 1697 | { |
c3f6f71d JM |
1698 | if (!pi->status_valid) |
1699 | if (!proc_get_status (pi)) | |
1700 | return 0; | |
c5aa993b | 1701 | |
44122162 RO |
1702 | /* Only works for the process procinfo, because the LWP procinfos do not |
1703 | get prstatus filled in. */ | |
0df8b418 | 1704 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 1705 | pi = find_procinfo_or_die (pi->pid, 0); |
c3f6f71d | 1706 | return pi->prstatus.pr_nlwp; |
c906108c SS |
1707 | } |
1708 | ||
77382aee PA |
1709 | /* LWP version. |
1710 | ||
1711 | Return the ID of the thread that had an event of interest. | |
1712 | (ie. the one that hit a breakpoint or other traced event). All | |
1713 | other things being equal, this should be the ID of a thread that is | |
1714 | currently executing. */ | |
c3f6f71d | 1715 | |
d3581e61 | 1716 | static int |
fba45db2 | 1717 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 1718 | { |
77382aee PA |
1719 | /* Note: this should be applied to the root procinfo for the |
1720 | process, not to the procinfo for an LWP. If applied to the | |
1721 | procinfo for an LWP, it will simply return that LWP's ID. In | |
1722 | that case, find the parent process procinfo. */ | |
19958708 | 1723 | |
c3f6f71d JM |
1724 | if (pi->tid != 0) |
1725 | pi = find_procinfo_or_die (pi->pid, 0); | |
1726 | ||
1727 | if (!pi->status_valid) | |
1728 | if (!proc_get_status (pi)) | |
1729 | return 0; | |
1730 | ||
c3f6f71d | 1731 | return pi->prstatus.pr_lwp.pr_lwpid; |
c3f6f71d JM |
1732 | } |
1733 | ||
77382aee PA |
1734 | /* Discover the IDs of all the threads within the process, and create |
1735 | a procinfo for each of them (chained to the parent). This | |
1736 | unfortunately requires a different method on every OS. Returns | |
1737 | non-zero for success, zero for failure. */ | |
c906108c | 1738 | |
a0911fd0 | 1739 | static int |
fba45db2 | 1740 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
1741 | { |
1742 | if (thread && parent) /* sanity */ | |
c906108c | 1743 | { |
c3f6f71d JM |
1744 | thread->status_valid = 0; |
1745 | if (!proc_get_status (thread)) | |
1746 | destroy_one_procinfo (&parent->thread_list, thread); | |
1747 | } | |
1748 | return 0; /* keep iterating */ | |
1749 | } | |
c5aa993b | 1750 | |
004527cb AC |
1751 | static void |
1752 | do_closedir_cleanup (void *dir) | |
1753 | { | |
b196bc4c | 1754 | closedir ((DIR *) dir); |
004527cb AC |
1755 | } |
1756 | ||
d3581e61 | 1757 | static int |
fba45db2 | 1758 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
1759 | { |
1760 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
1761 | struct dirent *direntry; | |
1762 | struct cleanup *old_chain = NULL; | |
1763 | procinfo *thread; | |
1764 | DIR *dirp; | |
1765 | int lwpid; | |
1766 | ||
77382aee PA |
1767 | /* We should never have to apply this operation to any procinfo |
1768 | except the one for the main process. If that ever changes for | |
1769 | any reason, then take out the following clause and replace it | |
1770 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1771 | |
c3f6f71d JM |
1772 | if (pi->tid != 0) |
1773 | pi = find_procinfo_or_die (pi->pid, 0); | |
1774 | ||
1775 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
1776 | ||
05b4bd79 PA |
1777 | /* Note: this brute-force method was originally devised for Unixware |
1778 | (support removed since), and will also work on Solaris 2.6 and | |
1779 | 2.7. The original comment mentioned the existence of a much | |
1780 | simpler and more elegant way to do this on Solaris, but didn't | |
1781 | point out what that was. */ | |
c3f6f71d JM |
1782 | |
1783 | strcpy (pathname, pi->pathname); | |
1784 | strcat (pathname, "/lwp"); | |
1785 | if ((dirp = opendir (pathname)) == NULL) | |
1786 | proc_error (pi, "update_threads, opendir", __LINE__); | |
1787 | ||
004527cb | 1788 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
1789 | while ((direntry = readdir (dirp)) != NULL) |
1790 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
1791 | { | |
1792 | lwpid = atoi (&direntry->d_name[0]); | |
1793 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
1794 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
1795 | } | |
1796 | pi->threads_valid = 1; | |
1797 | do_cleanups (old_chain); | |
1798 | return 1; | |
1799 | } | |
c906108c | 1800 | |
77382aee PA |
1801 | /* Given a pointer to a function, call that function once for each lwp |
1802 | in the procinfo list, until the function returns non-zero, in which | |
1803 | event return the value returned by the function. | |
1804 | ||
1805 | Note: this function does NOT call update_threads. If you want to | |
1806 | discover new threads first, you must call that function explicitly. | |
1807 | This function just makes a quick pass over the currently-known | |
1808 | procinfos. | |
1809 | ||
1810 | PI is the parent process procinfo. FUNC is the per-thread | |
1811 | function. PTR is an opaque parameter for function. Returns the | |
1812 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 1813 | |
d3581e61 | 1814 | static int |
d0849a9a KB |
1815 | proc_iterate_over_threads (procinfo *pi, |
1816 | int (*func) (procinfo *, procinfo *, void *), | |
1817 | void *ptr) | |
c906108c | 1818 | { |
c3f6f71d JM |
1819 | procinfo *thread, *next; |
1820 | int retval = 0; | |
c906108c | 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 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 1831 | { |
0df8b418 | 1832 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
1833 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
1834 | break; | |
c906108c | 1835 | } |
c3f6f71d JM |
1836 | |
1837 | return retval; | |
c906108c SS |
1838 | } |
1839 | ||
c3f6f71d JM |
1840 | /* =================== END, Thread "MODULE" =================== */ |
1841 | ||
1842 | /* =================== END, /proc "MODULE" =================== */ | |
1843 | ||
1844 | /* =================== GDB "MODULE" =================== */ | |
1845 | ||
77382aee PA |
1846 | /* Here are all of the gdb target vector functions and their |
1847 | friends. */ | |
c3f6f71d | 1848 | |
39f77062 | 1849 | static ptid_t do_attach (ptid_t ptid); |
6bd6f3b6 | 1850 | static void do_detach (); |
9185ddce | 1851 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 1852 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 1853 | |
77382aee PA |
1854 | /* Sets up the inferior to be debugged. Registers to trace signals, |
1855 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
1856 | may want to customize that. Returns zero for success (note! | |
1857 | unlike most functions in this module); on failure, returns the LINE | |
1858 | NUMBER where it failed! */ | |
c3f6f71d JM |
1859 | |
1860 | static int | |
fba45db2 | 1861 | procfs_debug_inferior (procinfo *pi) |
c906108c | 1862 | { |
c3f6f71d | 1863 | fltset_t traced_faults; |
44122162 | 1864 | sigset_t traced_signals; |
37de36c6 KB |
1865 | sysset_t *traced_syscall_entries; |
1866 | sysset_t *traced_syscall_exits; | |
1867 | int status; | |
c906108c | 1868 | |
0df8b418 MS |
1869 | /* Register to trace hardware faults in the child. */ |
1870 | prfillset (&traced_faults); /* trace all faults... */ | |
44122162 | 1871 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
1872 | if (!proc_set_traced_faults (pi, &traced_faults)) |
1873 | return __LINE__; | |
c906108c | 1874 | |
2455069d UW |
1875 | /* Initially, register to trace all signals in the child. */ |
1876 | prfillset (&traced_signals); | |
1877 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
1878 | return __LINE__; |
1879 | ||
37de36c6 | 1880 | |
c3f6f71d | 1881 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 | 1882 | traced_syscall_entries = sysset_t_alloc (pi); |
44122162 RO |
1883 | premptyset (traced_syscall_entries); |
1884 | praddset (traced_syscall_entries, SYS_exit); | |
1885 | praddset (traced_syscall_entries, SYS_lwp_exit); | |
c906108c | 1886 | |
37de36c6 KB |
1887 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
1888 | xfree (traced_syscall_entries); | |
1889 | if (!status) | |
c3f6f71d JM |
1890 | return __LINE__; |
1891 | ||
44122162 | 1892 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
1893 | /* GW: Rationale... |
1894 | Not all systems with /proc have all the exec* syscalls with the same | |
1895 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 1896 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 1897 | |
37de36c6 | 1898 | traced_syscall_exits = sysset_t_alloc (pi); |
44122162 | 1899 | premptyset (traced_syscall_exits); |
c3f6f71d | 1900 | #ifdef SYS_exec |
44122162 | 1901 | praddset (traced_syscall_exits, SYS_exec); |
37de36c6 | 1902 | #endif |
44122162 RO |
1903 | praddset (traced_syscall_exits, SYS_execve); |
1904 | praddset (traced_syscall_exits, SYS_lwp_create); | |
1905 | praddset (traced_syscall_exits, SYS_lwp_exit); | |
c906108c | 1906 | |
37de36c6 KB |
1907 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
1908 | xfree (traced_syscall_exits); | |
1909 | if (!status) | |
c3f6f71d JM |
1910 | return __LINE__; |
1911 | ||
c3f6f71d | 1912 | return 0; |
c906108c SS |
1913 | } |
1914 | ||
19958708 | 1915 | static void |
c0939df1 | 1916 | procfs_attach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 1917 | { |
c3f6f71d JM |
1918 | char *exec_file; |
1919 | int pid; | |
1920 | ||
74164c56 | 1921 | pid = parse_pid_to_attach (args); |
c3f6f71d | 1922 | |
c3f6f71d | 1923 | if (pid == getpid ()) |
8a3fe4f8 | 1924 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 1925 | |
c3f6f71d | 1926 | if (from_tty) |
c906108c | 1927 | { |
c3f6f71d JM |
1928 | exec_file = get_exec_file (0); |
1929 | ||
1930 | if (exec_file) | |
a3f17187 | 1931 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 1932 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 1933 | else |
a3f17187 | 1934 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 1935 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
1936 | |
1937 | fflush (stdout); | |
c906108c | 1938 | } |
39f77062 | 1939 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
6a3cb8e8 PA |
1940 | if (!target_is_pushed (ops)) |
1941 | push_target (ops); | |
c3f6f71d JM |
1942 | } |
1943 | ||
19958708 | 1944 | static void |
6e1e1966 | 1945 | procfs_detach (struct target_ops *ops, inferior *inf, int from_tty) |
c3f6f71d | 1946 | { |
dfd4cc63 | 1947 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b | 1948 | |
c3f6f71d | 1949 | if (from_tty) |
c906108c | 1950 | { |
995816ba | 1951 | const char *exec_file; |
cc377e6b | 1952 | |
c3f6f71d | 1953 | exec_file = get_exec_file (0); |
cc377e6b | 1954 | if (exec_file == NULL) |
c3f6f71d | 1955 | exec_file = ""; |
cc377e6b | 1956 | |
a3f17187 | 1957 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
1958 | target_pid_to_str (pid_to_ptid (pid))); |
1959 | gdb_flush (gdb_stdout); | |
c906108c | 1960 | } |
19958708 | 1961 | |
6bd6f3b6 | 1962 | do_detach (); |
cc377e6b | 1963 | |
39f77062 | 1964 | inferior_ptid = null_ptid; |
7f9f62ba | 1965 | detach_inferior (pid); |
6a3cb8e8 | 1966 | inf_child_maybe_unpush_target (ops); |
c906108c SS |
1967 | } |
1968 | ||
39f77062 KB |
1969 | static ptid_t |
1970 | do_attach (ptid_t ptid) | |
c906108c | 1971 | { |
c3f6f71d | 1972 | procinfo *pi; |
181e7f93 | 1973 | struct inferior *inf; |
c3f6f71d | 1974 | int fail; |
2689673f | 1975 | int lwpid; |
c3f6f71d | 1976 | |
dfd4cc63 | 1977 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 1978 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
1979 | |
1980 | if (!open_procinfo_files (pi, FD_CTL)) | |
1981 | { | |
1982 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 1983 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 1984 | ptid_get_pid (ptid)); |
c3f6f71d JM |
1985 | dead_procinfo (pi, errmsg, NOKILL); |
1986 | } | |
c906108c | 1987 | |
c3f6f71d JM |
1988 | /* Stop the process (if it isn't already stopped). */ |
1989 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 1990 | { |
c3f6f71d JM |
1991 | pi->was_stopped = 1; |
1992 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
1993 | } |
1994 | else | |
1995 | { | |
c3f6f71d JM |
1996 | pi->was_stopped = 0; |
1997 | /* Set the process to run again when we close it. */ | |
1998 | if (!proc_set_run_on_last_close (pi)) | |
1999 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
2000 | ||
0df8b418 | 2001 | /* Now stop the process. */ |
c3f6f71d JM |
2002 | if (!proc_stop_process (pi)) |
2003 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
2004 | pi->ignore_next_sigstop = 1; | |
c906108c | 2005 | } |
c3f6f71d JM |
2006 | /* Save some of the /proc state to be restored if we detach. */ |
2007 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2008 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
2009 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
2010 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 2011 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2012 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
2013 | NOKILL); | |
37de36c6 | 2014 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 2015 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
2016 | NOKILL); |
2017 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2018 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
2019 | ||
2020 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
2021 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
2022 | ||
6c95b8df PA |
2023 | inf = current_inferior (); |
2024 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 2025 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 2026 | inf->attach_flag = 1; |
2689673f PA |
2027 | |
2028 | /* Create a procinfo for the current lwp. */ | |
2029 | lwpid = proc_get_current_thread (pi); | |
2030 | create_procinfo (pi->pid, lwpid); | |
2031 | ||
2032 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 2033 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
2034 | add_thread (ptid); |
2035 | ||
2036 | return ptid; | |
c906108c SS |
2037 | } |
2038 | ||
2039 | static void | |
6bd6f3b6 | 2040 | do_detach () |
c906108c | 2041 | { |
c3f6f71d | 2042 | procinfo *pi; |
c906108c | 2043 | |
0df8b418 | 2044 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
2045 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
2046 | 0); /* FIXME: threads */ | |
c5aa993b | 2047 | |
c3f6f71d JM |
2048 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
2049 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 2050 | |
c3f6f71d JM |
2051 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
2052 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
2053 | ||
37de36c6 | 2054 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2055 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
2056 | ||
37de36c6 | 2057 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2058 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
2059 | ||
2060 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
2061 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
2062 | ||
6bd6f3b6 SM |
2063 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
2064 | if (!(pi->was_stopped) | |
2065 | || query (_("Was stopped when attached, make it runnable again? "))) | |
c3f6f71d JM |
2066 | { |
2067 | /* Clear any pending signal. */ | |
2068 | if (!proc_clear_current_fault (pi)) | |
2069 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
2070 | ||
6bd6f3b6 | 2071 | if (!proc_clear_current_signal (pi)) |
1a303dec MS |
2072 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
2073 | ||
c3f6f71d JM |
2074 | if (!proc_set_run_on_last_close (pi)) |
2075 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
2076 | } | |
2077 | ||
c3f6f71d | 2078 | destroy_procinfo (pi); |
c906108c SS |
2079 | } |
2080 | ||
772cf8be MK |
2081 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
2082 | for all registers. | |
2083 | ||
2084 | ??? Is the following note still relevant? We can't get individual | |
2085 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
2086 | don't bother with caching at all in that case. | |
2087 | ||
2088 | NOTE: Since the /proc interface cannot give us individual | |
2089 | registers, we pay no attention to REGNUM, and just fetch them all. | |
2090 | This results in the possibility that we will do unnecessarily many | |
2091 | fetches, since we may be called repeatedly for individual | |
2092 | registers. So we cache the results, and mark the cache invalid | |
2093 | when the process is resumed. */ | |
c3f6f71d | 2094 | |
c906108c | 2095 | static void |
28439f5e PA |
2096 | procfs_fetch_registers (struct target_ops *ops, |
2097 | struct regcache *regcache, int regnum) | |
c906108c | 2098 | { |
772cf8be MK |
2099 | gdb_gregset_t *gregs; |
2100 | procinfo *pi; | |
bcc0c096 SM |
2101 | ptid_t ptid = regcache_get_ptid (regcache); |
2102 | int pid = ptid_get_pid (ptid); | |
2103 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2104 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2105 | |
2689673f | 2106 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2107 | |
2108 | if (pi == NULL) | |
8a3fe4f8 | 2109 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
bcc0c096 | 2110 | target_pid_to_str (ptid)); |
c3f6f71d | 2111 | |
772cf8be MK |
2112 | gregs = proc_get_gregs (pi); |
2113 | if (gregs == NULL) | |
c3f6f71d JM |
2114 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
2115 | ||
56be3814 | 2116 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 2117 | |
40a6adc1 | 2118 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2119 | { |
772cf8be MK |
2120 | gdb_fpregset_t *fpregs; |
2121 | ||
40a6adc1 MD |
2122 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2123 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2124 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2125 | return; /* Not a floating point register. */ |
c5aa993b | 2126 | |
772cf8be MK |
2127 | fpregs = proc_get_fpregs (pi); |
2128 | if (fpregs == NULL) | |
60054393 | 2129 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 2130 | |
56be3814 | 2131 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 2132 | } |
c906108c SS |
2133 | } |
2134 | ||
772cf8be MK |
2135 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
2136 | this for all registers. | |
2137 | ||
2138 | NOTE: Since the /proc interface will not read individual registers, | |
2139 | we will cache these requests until the process is resumed, and only | |
2140 | then write them back to the inferior process. | |
77382aee | 2141 | |
772cf8be MK |
2142 | FIXME: is that a really bad idea? Have to think about cases where |
2143 | writing one register might affect the value of others, etc. */ | |
c906108c | 2144 | |
c3f6f71d | 2145 | static void |
28439f5e PA |
2146 | procfs_store_registers (struct target_ops *ops, |
2147 | struct regcache *regcache, int regnum) | |
c3f6f71d | 2148 | { |
772cf8be MK |
2149 | gdb_gregset_t *gregs; |
2150 | procinfo *pi; | |
bcc0c096 SM |
2151 | ptid_t ptid = regcache_get_ptid (regcache); |
2152 | int pid = ptid_get_pid (ptid); | |
2153 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2154 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2155 | |
2689673f | 2156 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2157 | |
2158 | if (pi == NULL) | |
8a3fe4f8 | 2159 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
bcc0c096 | 2160 | target_pid_to_str (ptid)); |
c906108c | 2161 | |
772cf8be MK |
2162 | gregs = proc_get_gregs (pi); |
2163 | if (gregs == NULL) | |
c3f6f71d | 2164 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 2165 | |
56be3814 | 2166 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
2167 | if (!proc_set_gregs (pi)) |
2168 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 2169 | |
40a6adc1 | 2170 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2171 | { |
772cf8be MK |
2172 | gdb_fpregset_t *fpregs; |
2173 | ||
40a6adc1 MD |
2174 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2175 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2176 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2177 | return; /* Not a floating point register. */ |
60054393 | 2178 | |
772cf8be MK |
2179 | fpregs = proc_get_fpregs (pi); |
2180 | if (fpregs == NULL) | |
60054393 MS |
2181 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
2182 | ||
56be3814 | 2183 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
2184 | if (!proc_set_fpregs (pi)) |
2185 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
2186 | } | |
c3f6f71d | 2187 | } |
c906108c | 2188 | |
37de36c6 KB |
2189 | static int |
2190 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
2191 | { | |
37de36c6 KB |
2192 | if (scall == SYS_lwp_exit) |
2193 | return 1; | |
37de36c6 KB |
2194 | return 0; |
2195 | } | |
2196 | ||
2197 | static int | |
2198 | syscall_is_exit (procinfo *pi, int scall) | |
2199 | { | |
37de36c6 KB |
2200 | if (scall == SYS_exit) |
2201 | return 1; | |
37de36c6 KB |
2202 | return 0; |
2203 | } | |
2204 | ||
2205 | static int | |
2206 | syscall_is_exec (procinfo *pi, int scall) | |
2207 | { | |
2208 | #ifdef SYS_exec | |
2209 | if (scall == SYS_exec) | |
2210 | return 1; | |
2211 | #endif | |
37de36c6 KB |
2212 | if (scall == SYS_execve) |
2213 | return 1; | |
37de36c6 KB |
2214 | return 0; |
2215 | } | |
2216 | ||
2217 | static int | |
2218 | syscall_is_lwp_create (procinfo *pi, int scall) | |
2219 | { | |
37de36c6 KB |
2220 | if (scall == SYS_lwp_create) |
2221 | return 1; | |
37de36c6 KB |
2222 | return 0; |
2223 | } | |
2224 | ||
77382aee PA |
2225 | /* Retrieve the next stop event from the child process. If child has |
2226 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
2227 | (or possibly wait eventcodes) into gdb internal event codes. | |
2228 | Returns the id of process (and possibly thread) that incurred the | |
2229 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 2230 | |
39f77062 | 2231 | static ptid_t |
117de6a9 | 2232 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 2233 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 2234 | { |
0df8b418 | 2235 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 2236 | procinfo *pi; |
39f77062 KB |
2237 | int wstat; |
2238 | int temp_tid; | |
2239 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
2240 | int why, what, flags; |
2241 | int retry = 0; | |
c906108c | 2242 | |
c3f6f71d | 2243 | wait_again: |
c906108c | 2244 | |
c3f6f71d JM |
2245 | retry++; |
2246 | wstat = 0; | |
39f77062 | 2247 | retval = pid_to_ptid (-1); |
c906108c | 2248 | |
0df8b418 | 2249 | /* Find procinfo for main process. */ |
dfd4cc63 | 2250 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2251 | if (pi) |
c906108c | 2252 | { |
0df8b418 | 2253 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
2254 | pi->status_valid = 0; |
2255 | pi->gregs_valid = 0; | |
2256 | pi->fpregs_valid = 0; | |
2257 | ||
0df8b418 | 2258 | #if 0 /* just try this out... */ |
c3f6f71d JM |
2259 | flags = proc_flags (pi); |
2260 | why = proc_why (pi); | |
2261 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 2262 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
2263 | #endif |
2264 | /* If child is not stopped, wait for it to stop. */ | |
2265 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
2266 | !proc_wait_for_stop (pi)) | |
c906108c | 2267 | { |
0df8b418 | 2268 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 2269 | if (errno == ENOENT) |
c906108c | 2270 | { |
39f77062 KB |
2271 | int wait_retval; |
2272 | ||
0df8b418 MS |
2273 | /* /proc file not found; presumably child has terminated. */ |
2274 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 2275 | |
dfd4cc63 LM |
2276 | /* Wrong child? */ |
2277 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
2278 | error (_("procfs: couldn't stop " |
2279 | "process %d: wait returned %d."), | |
dfd4cc63 | 2280 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 2281 | /* FIXME: might I not just use waitpid? |
0df8b418 | 2282 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 2283 | retval = pid_to_ptid (wait_retval); |
c906108c | 2284 | } |
d1566ff5 FN |
2285 | else if (errno == EINTR) |
2286 | goto wait_again; | |
c3f6f71d | 2287 | else |
c906108c | 2288 | { |
0df8b418 | 2289 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 2290 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 2291 | } |
c3f6f71d JM |
2292 | } |
2293 | else | |
2294 | { | |
2295 | /* This long block is reached if either: | |
2296 | a) the child was already stopped, or | |
2297 | b) we successfully waited for the child with wait_for_stop. | |
2298 | This block will analyze the /proc status, and translate it | |
2299 | into a waitstatus for GDB. | |
2300 | ||
2301 | If we actually had to call wait because the /proc file | |
19958708 | 2302 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
2303 | because we already have a waitstatus. */ |
2304 | ||
2305 | flags = proc_flags (pi); | |
2306 | why = proc_why (pi); | |
2307 | what = proc_what (pi); | |
2308 | ||
c3f6f71d | 2309 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 2310 | { |
c3f6f71d JM |
2311 | /* If it's running async (for single_thread control), |
2312 | set it back to normal again. */ | |
2313 | if (flags & PR_ASYNC) | |
2314 | if (!proc_unset_async (pi)) | |
2315 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
c3f6f71d JM |
2316 | |
2317 | if (info_verbose) | |
2318 | proc_prettyprint_why (why, what, 1); | |
2319 | ||
2320 | /* The 'pid' we will return to GDB is composed of | |
2321 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 2322 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
2323 | |
2324 | switch (why) { | |
2325 | case PR_SIGNALLED: | |
2326 | wstat = (what << 8) | 0177; | |
2327 | break; | |
2328 | case PR_SYSENTRY: | |
37de36c6 | 2329 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 2330 | { |
17faa917 DJ |
2331 | if (print_thread_events) |
2332 | printf_unfiltered (_("[%s exited]\n"), | |
2333 | target_pid_to_str (retval)); | |
37de36c6 KB |
2334 | delete_thread (retval); |
2335 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2336 | return retval; | |
2337 | } | |
2338 | else if (syscall_is_exit (pi, what)) | |
2339 | { | |
181e7f93 PA |
2340 | struct inferior *inf; |
2341 | ||
0df8b418 | 2342 | /* Handle SYS_exit call only. */ |
37de36c6 | 2343 | /* Stopped at entry to SYS_exit. |
19958708 | 2344 | Make it runnable, resume it, then use |
37de36c6 | 2345 | the wait system call to get its exit code. |
19958708 | 2346 | Proc_run_process always clears the current |
37de36c6 KB |
2347 | fault and signal. |
2348 | Then return its exit status. */ | |
2349 | pi->status_valid = 0; | |
2350 | wstat = 0; | |
19958708 | 2351 | /* FIXME: what we should do is return |
37de36c6 KB |
2352 | TARGET_WAITKIND_SPURIOUS. */ |
2353 | if (!proc_run_process (pi, 0, 0)) | |
2354 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
2355 | |
2356 | inf = find_inferior_pid (pi->pid); | |
2357 | if (inf->attach_flag) | |
c3f6f71d | 2358 | { |
19958708 | 2359 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
2360 | return a "success" exit code. Bogus: what if |
2361 | it returns something else? */ | |
2362 | wstat = 0; | |
39f77062 | 2363 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
2364 | } |
2365 | else | |
2366 | { | |
2367 | int temp = wait (&wstat); | |
2368 | ||
2369 | /* FIXME: shouldn't I make sure I get the right | |
2370 | event from the right process? If (for | |
2371 | instance) I have killed an earlier inferior | |
2372 | process but failed to clean up after it | |
2373 | somehow, I could get its termination event | |
2374 | here. */ | |
2375 | ||
0df8b418 MS |
2376 | /* If wait returns -1, that's what we return |
2377 | to GDB. */ | |
37de36c6 | 2378 | if (temp < 0) |
39f77062 | 2379 | retval = pid_to_ptid (temp); |
c3f6f71d | 2380 | } |
c3f6f71d | 2381 | } |
37de36c6 KB |
2382 | else |
2383 | { | |
a3f17187 | 2384 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
2385 | proc_prettyprint_syscall (proc_what (pi), 0); |
2386 | printf_filtered ("\n"); | |
44122162 RO |
2387 | |
2388 | long i, nsysargs, *sysargs; | |
2389 | ||
2390 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2391 | (sysargs = proc_sysargs (pi)) != NULL) | |
2392 | { | |
2393 | printf_filtered (_("%ld syscall arguments:\n"), | |
2394 | nsysargs); | |
2395 | for (i = 0; i < nsysargs; i++) | |
2396 | printf_filtered ("#%ld: 0x%08lx\n", | |
2397 | i, sysargs[i]); | |
2398 | } | |
2399 | ||
37de36c6 KB |
2400 | if (status) |
2401 | { | |
0df8b418 MS |
2402 | /* How to exit gracefully, returning "unknown |
2403 | event". */ | |
37de36c6 | 2404 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2405 | return inferior_ptid; |
37de36c6 KB |
2406 | } |
2407 | else | |
2408 | { | |
2409 | /* How to keep going without returning to wfi: */ | |
049a8570 | 2410 | target_continue_no_signal (ptid); |
37de36c6 KB |
2411 | goto wait_again; |
2412 | } | |
2413 | } | |
2414 | break; | |
2415 | case PR_SYSEXIT: | |
2416 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 2417 | { |
37de36c6 KB |
2418 | /* Hopefully this is our own "fork-child" execing |
2419 | the real child. Hoax this event into a trap, and | |
2420 | GDB will see the child about to execute its start | |
0df8b418 | 2421 | address. */ |
37de36c6 KB |
2422 | wstat = (SIGTRAP << 8) | 0177; |
2423 | } | |
2424 | else if (syscall_is_lwp_create (pi, what)) | |
2425 | { | |
77382aee PA |
2426 | /* This syscall is somewhat like fork/exec. We |
2427 | will get the event twice: once for the parent | |
2428 | LWP, and once for the child. We should already | |
2429 | know about the parent LWP, but the child will | |
2430 | be new to us. So, whenever we get this event, | |
2431 | if it represents a new thread, simply add the | |
2432 | thread to the list. */ | |
c3f6f71d | 2433 | |
37de36c6 | 2434 | /* If not in procinfo list, add it. */ |
39f77062 KB |
2435 | temp_tid = proc_get_current_thread (pi); |
2436 | if (!find_procinfo (pi->pid, temp_tid)) | |
2437 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 2438 | |
dfd4cc63 | 2439 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 2440 | /* If not in GDB's thread list, add it. */ |
39f77062 | 2441 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
2442 | add_thread (temp_ptid); |
2443 | ||
0df8b418 | 2444 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 2445 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2446 | return inferior_ptid; |
37de36c6 KB |
2447 | } |
2448 | else if (syscall_is_lwp_exit (pi, what)) | |
2449 | { | |
17faa917 DJ |
2450 | if (print_thread_events) |
2451 | printf_unfiltered (_("[%s exited]\n"), | |
2452 | target_pid_to_str (retval)); | |
37de36c6 KB |
2453 | delete_thread (retval); |
2454 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2455 | return retval; | |
c3f6f71d | 2456 | } |
37de36c6 KB |
2457 | else if (0) |
2458 | { | |
2459 | /* FIXME: Do we need to handle SYS_sproc, | |
2460 | SYS_fork, or SYS_vfork here? The old procfs | |
2461 | seemed to use this event to handle threads on | |
2462 | older (non-LWP) systems, where I'm assuming | |
19958708 | 2463 | that threads were actually separate processes. |
37de36c6 KB |
2464 | Irix, maybe? Anyway, low priority for now. */ |
2465 | } | |
2466 | else | |
2467 | { | |
a3f17187 | 2468 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
2469 | proc_prettyprint_syscall (proc_what (pi), 0); |
2470 | printf_filtered ("\n"); | |
44122162 RO |
2471 | |
2472 | long i, nsysargs, *sysargs; | |
2473 | ||
2474 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2475 | (sysargs = proc_sysargs (pi)) != NULL) | |
2476 | { | |
2477 | printf_filtered (_("%ld syscall arguments:\n"), | |
2478 | nsysargs); | |
2479 | for (i = 0; i < nsysargs; i++) | |
2480 | printf_filtered ("#%ld: 0x%08lx\n", | |
2481 | i, sysargs[i]); | |
2482 | } | |
2483 | ||
37de36c6 | 2484 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2485 | return inferior_ptid; |
37de36c6 | 2486 | } |
c3f6f71d JM |
2487 | break; |
2488 | case PR_REQUESTED: | |
2489 | #if 0 /* FIXME */ | |
2490 | wstat = (SIGSTOP << 8) | 0177; | |
2491 | break; | |
2492 | #else | |
2493 | if (retry < 5) | |
2494 | { | |
a3f17187 | 2495 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
2496 | pi->status_valid = 0; |
2497 | goto wait_again; | |
2498 | } | |
2499 | else | |
2500 | { | |
2501 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
2502 | temp_tid = proc_get_current_thread (pi); |
2503 | if (!find_procinfo (pi->pid, temp_tid)) | |
2504 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
2505 | |
2506 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 2507 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 2508 | if (!in_thread_list (temp_ptid)) |
93815fbf | 2509 | add_thread (temp_ptid); |
c3f6f71d JM |
2510 | |
2511 | status->kind = TARGET_WAITKIND_STOPPED; | |
b196bc4c | 2512 | status->value.sig = GDB_SIGNAL_0; |
c3f6f71d JM |
2513 | return retval; |
2514 | } | |
2515 | #endif | |
2516 | case PR_JOBCONTROL: | |
2517 | wstat = (what << 8) | 0177; | |
2518 | break; | |
2519 | case PR_FAULTED: | |
7af6341f | 2520 | switch (what) { |
c3f6f71d JM |
2521 | case FLTWATCH: |
2522 | wstat = (SIGTRAP << 8) | 0177; | |
2523 | break; | |
0df8b418 | 2524 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 2525 | case FLTPRIV: |
c3f6f71d | 2526 | case FLTILL: |
c3f6f71d JM |
2527 | wstat = (SIGILL << 8) | 0177; |
2528 | break; | |
2529 | case FLTBPT: | |
c3f6f71d | 2530 | case FLTTRACE: |
c3f6f71d JM |
2531 | wstat = (SIGTRAP << 8) | 0177; |
2532 | break; | |
2533 | case FLTSTACK: | |
2534 | case FLTACCESS: | |
c3f6f71d | 2535 | case FLTBOUNDS: |
c3f6f71d JM |
2536 | wstat = (SIGSEGV << 8) | 0177; |
2537 | break; | |
2538 | case FLTIOVF: | |
2539 | case FLTIZDIV: | |
c3f6f71d | 2540 | case FLTFPE: |
c3f6f71d JM |
2541 | wstat = (SIGFPE << 8) | 0177; |
2542 | break; | |
3e43a32a | 2543 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
2544 | default: /* FIXME: use si_signo if possible for |
2545 | fault. */ | |
39f77062 | 2546 | retval = pid_to_ptid (-1); |
c3f6f71d | 2547 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 2548 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2549 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2550 | error (_("... giving up...")); |
c3f6f71d JM |
2551 | break; |
2552 | } | |
2553 | break; /* case PR_FAULTED: */ | |
2554 | default: /* switch (why) unmatched */ | |
2555 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 2556 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2557 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2558 | error (_("... giving up...")); |
c3f6f71d JM |
2559 | break; |
2560 | } | |
77382aee PA |
2561 | /* Got this far without error: If retval isn't in the |
2562 | threads database, add it. */ | |
dfd4cc63 | 2563 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 2564 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 2565 | !in_thread_list (retval)) |
c906108c | 2566 | { |
77382aee PA |
2567 | /* We have a new thread. We need to add it both to |
2568 | GDB's list and to our own. If we don't create a | |
2569 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 2570 | add_thread (retval); |
dfd4cc63 LM |
2571 | if (find_procinfo (ptid_get_pid (retval), |
2572 | ptid_get_lwp (retval)) == NULL) | |
2573 | create_procinfo (ptid_get_pid (retval), | |
2574 | ptid_get_lwp (retval)); | |
c906108c | 2575 | } |
c906108c | 2576 | } |
0df8b418 | 2577 | else /* Flags do not indicate STOPPED. */ |
c906108c | 2578 | { |
0df8b418 | 2579 | /* surely this can't happen... */ |
c3f6f71d JM |
2580 | printf_filtered ("procfs:%d -- process not stopped.\n", |
2581 | __LINE__); | |
2582 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 2583 | error (_("procfs: ...giving up...")); |
c906108c | 2584 | } |
c906108c | 2585 | } |
c906108c | 2586 | |
c3f6f71d JM |
2587 | if (status) |
2588 | store_waitstatus (status, wstat); | |
c906108c SS |
2589 | } |
2590 | ||
c3f6f71d JM |
2591 | return retval; |
2592 | } | |
c906108c | 2593 | |
4e73f23d RM |
2594 | /* Perform a partial transfer to/from the specified object. For |
2595 | memory transfers, fall back to the old memory xfer functions. */ | |
2596 | ||
9b409511 | 2597 | static enum target_xfer_status |
4e73f23d | 2598 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
0b62613e | 2599 | const char *annex, gdb_byte *readbuf, |
9b409511 YQ |
2600 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
2601 | ULONGEST *xfered_len) | |
4e73f23d RM |
2602 | { |
2603 | switch (object) | |
2604 | { | |
2605 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 2606 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d | 2607 | |
4e73f23d | 2608 | case TARGET_OBJECT_AUXV: |
9f2982ff | 2609 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
9b409511 | 2610 | offset, len, xfered_len); |
4e73f23d RM |
2611 | |
2612 | default: | |
e75fdfca TT |
2613 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2614 | readbuf, writebuf, offset, len, | |
2615 | xfered_len); | |
4e73f23d RM |
2616 | } |
2617 | } | |
2618 | ||
e96027e0 PA |
2619 | /* Helper for procfs_xfer_partial that handles memory transfers. |
2620 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 2621 | |
e96027e0 PA |
2622 | static enum target_xfer_status |
2623 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2624 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
2625 | { |
2626 | procinfo *pi; | |
e96027e0 | 2627 | int nbytes; |
c906108c | 2628 | |
0df8b418 | 2629 | /* Find procinfo for main process. */ |
dfd4cc63 | 2630 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2631 | if (pi->as_fd == 0 && |
2632 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 2633 | { |
c3f6f71d | 2634 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 2635 | return TARGET_XFER_E_IO; |
c906108c | 2636 | } |
c906108c | 2637 | |
e96027e0 PA |
2638 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
2639 | return TARGET_XFER_E_IO; | |
2640 | ||
2641 | if (writebuf != NULL) | |
c906108c | 2642 | { |
e96027e0 PA |
2643 | PROCFS_NOTE ("write memory:\n"); |
2644 | nbytes = write (pi->as_fd, writebuf, len); | |
2645 | } | |
2646 | else | |
2647 | { | |
2648 | PROCFS_NOTE ("read memory:\n"); | |
2649 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 2650 | } |
e96027e0 PA |
2651 | if (nbytes <= 0) |
2652 | return TARGET_XFER_E_IO; | |
2653 | *xfered_len = nbytes; | |
2654 | return TARGET_XFER_OK; | |
c906108c SS |
2655 | } |
2656 | ||
77382aee PA |
2657 | /* Called by target_resume before making child runnable. Mark cached |
2658 | registers and status's invalid. If there are "dirty" caches that | |
2659 | need to be written back to the child process, do that. | |
c906108c | 2660 | |
77382aee PA |
2661 | File descriptors are also cached. As they are a limited resource, |
2662 | we cannot hold onto them indefinitely. However, as they are | |
2663 | expensive to open, we don't want to throw them away | |
2664 | indescriminately either. As a compromise, we will keep the file | |
2665 | descriptors for the parent process, but discard any file | |
2666 | descriptors we may have accumulated for the threads. | |
2667 | ||
2668 | As this function is called by iterate_over_threads, it always | |
2669 | returns zero (so that iterate_over_threads will keep | |
2670 | iterating). */ | |
c3f6f71d JM |
2671 | |
2672 | static int | |
fba45db2 | 2673 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 2674 | { |
77382aee PA |
2675 | /* About to run the child; invalidate caches and do any other |
2676 | cleanup. */ | |
c906108c | 2677 | |
c3f6f71d JM |
2678 | #if 0 |
2679 | if (pi->gregs_dirty) | |
2680 | if (parent == NULL || | |
2681 | proc_get_current_thread (parent) != pi->tid) | |
2682 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
2683 | proc_warn (pi, "target_resume, set_gregs", | |
2684 | __LINE__); | |
f5656ead | 2685 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
2686 | if (pi->fpregs_dirty) |
2687 | if (parent == NULL || | |
2688 | proc_get_current_thread (parent) != pi->tid) | |
2689 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 2690 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 2691 | __LINE__); |
c906108c | 2692 | #endif |
c906108c | 2693 | |
c3f6f71d | 2694 | if (parent != NULL) |
c906108c | 2695 | { |
c3f6f71d | 2696 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 2697 | Close any file descriptors that it might have open. |
c3f6f71d JM |
2698 | We don't do this to the master (parent) procinfo. */ |
2699 | ||
2700 | close_procinfo_files (pi); | |
c906108c | 2701 | } |
c3f6f71d JM |
2702 | pi->gregs_valid = 0; |
2703 | pi->fpregs_valid = 0; | |
2704 | #if 0 | |
2705 | pi->gregs_dirty = 0; | |
2706 | pi->fpregs_dirty = 0; | |
c906108c | 2707 | #endif |
c3f6f71d JM |
2708 | pi->status_valid = 0; |
2709 | pi->threads_valid = 0; | |
c906108c | 2710 | |
c3f6f71d | 2711 | return 0; |
c906108c SS |
2712 | } |
2713 | ||
0fda6bd2 | 2714 | #if 0 |
77382aee PA |
2715 | /* A callback function for iterate_over_threads. Find the |
2716 | asynchronous signal thread, and make it runnable. See if that | |
2717 | helps matters any. */ | |
c906108c | 2718 | |
c3f6f71d | 2719 | static int |
fba45db2 | 2720 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 2721 | { |
c3f6f71d JM |
2722 | #ifdef PR_ASLWP |
2723 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 2724 | { |
c3f6f71d JM |
2725 | if (!proc_run_process (pi, 0, -1)) |
2726 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
2727 | return 1; | |
c906108c | 2728 | } |
c906108c | 2729 | #endif |
c3f6f71d | 2730 | return 0; |
c906108c | 2731 | } |
0fda6bd2 | 2732 | #endif |
c906108c | 2733 | |
77382aee PA |
2734 | /* Make the child process runnable. Normally we will then call |
2735 | procfs_wait and wait for it to stop again (unless gdb is async). | |
2736 | ||
2737 | If STEP is true, then arrange for the child to stop again after | |
2738 | executing a single instruction. If SIGNO is zero, then cancel any | |
2739 | pending signal; if non-zero, then arrange for the indicated signal | |
2740 | to be delivered to the child when it runs. If PID is -1, then | |
2741 | allow any child thread to run; if non-zero, then allow only the | |
2742 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
2743 | |
2744 | static void | |
28439f5e | 2745 | procfs_resume (struct target_ops *ops, |
2ea28649 | 2746 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 2747 | { |
c3f6f71d JM |
2748 | procinfo *pi, *thread; |
2749 | int native_signo; | |
2750 | ||
19958708 | 2751 | /* 2.1: |
c3f6f71d | 2752 | prrun.prflags |= PRSVADDR; |
19958708 | 2753 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 2754 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 2755 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
2756 | prrun.prflags |= PRCFAULT; clear current fault. |
2757 | ||
2758 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 2759 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
2760 | PRSVADDR is unnecessary. |
2761 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
2762 | This basically leaves PRSTEP and PRCSIG. | |
2763 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
2764 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 2765 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 2766 | |
0df8b418 | 2767 | /* Find procinfo for main process. */ |
dfd4cc63 | 2768 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2769 | |
77382aee | 2770 | /* First cut: ignore pid argument. */ |
c3f6f71d | 2771 | errno = 0; |
c906108c | 2772 | |
c3f6f71d JM |
2773 | /* Convert signal to host numbering. */ |
2774 | if (signo == 0 || | |
a493e3e2 | 2775 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
2776 | native_signo = 0; |
2777 | else | |
2ea28649 | 2778 | native_signo = gdb_signal_to_host (signo); |
c906108c | 2779 | |
c3f6f71d | 2780 | pi->ignore_next_sigstop = 0; |
c906108c | 2781 | |
77382aee PA |
2782 | /* Running the process voids all cached registers and status. */ |
2783 | /* Void the threads' caches first. */ | |
19958708 | 2784 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
2785 | /* Void the process procinfo's caches. */ |
2786 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 2787 | |
dfd4cc63 | 2788 | if (ptid_get_pid (ptid) != -1) |
c906108c | 2789 | { |
77382aee PA |
2790 | /* Resume a specific thread, presumably suppressing the |
2791 | others. */ | |
dfd4cc63 | 2792 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 2793 | if (thread != NULL) |
c906108c | 2794 | { |
c3f6f71d JM |
2795 | if (thread->tid != 0) |
2796 | { | |
77382aee PA |
2797 | /* We're to resume a specific thread, and not the |
2798 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
2799 | if (!proc_set_async (pi)) |
2800 | proc_error (pi, "target_resume, set_async", __LINE__); | |
c3f6f71d | 2801 | #if 0 |
19958708 | 2802 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
2803 | make_signal_thread_runnable, |
2804 | NULL); | |
2805 | #endif | |
0df8b418 MS |
2806 | pi = thread; /* Substitute the thread's procinfo |
2807 | for run. */ | |
c3f6f71d | 2808 | } |
c906108c SS |
2809 | } |
2810 | } | |
c906108c | 2811 | |
c3f6f71d | 2812 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 2813 | { |
c3f6f71d | 2814 | if (errno == EBUSY) |
77382aee PA |
2815 | warning (_("resume: target already running. " |
2816 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
2817 | else |
2818 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 2819 | } |
c3f6f71d | 2820 | } |
c906108c | 2821 | |
77382aee | 2822 | /* Set up to trace signals in the child process. */ |
c906108c | 2823 | |
c3f6f71d | 2824 | static void |
94bedb42 TT |
2825 | procfs_pass_signals (struct target_ops *self, |
2826 | int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 2827 | { |
44122162 | 2828 | sigset_t signals; |
dfd4cc63 | 2829 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 2830 | int signo; |
c906108c | 2831 | |
2455069d UW |
2832 | prfillset (&signals); |
2833 | ||
2834 | for (signo = 0; signo < NSIG; signo++) | |
2835 | { | |
2ea28649 | 2836 | int target_signo = gdb_signal_from_host (signo); |
2455069d | 2837 | if (target_signo < numsigs && pass_signals[target_signo]) |
44122162 | 2838 | prdelset (&signals, signo); |
2455069d UW |
2839 | } |
2840 | ||
2841 | if (!proc_set_traced_signals (pi, &signals)) | |
2842 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 2843 | } |
c906108c | 2844 | |
77382aee | 2845 | /* Print status information about the child process. */ |
c906108c | 2846 | |
c3f6f71d | 2847 | static void |
fba45db2 | 2848 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 2849 | { |
181e7f93 | 2850 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 2851 | |
a3f17187 | 2852 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 2853 | inf->attach_flag? "attached": "child", |
39f77062 | 2854 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 2855 | } |
c906108c | 2856 | |
77382aee PA |
2857 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
2858 | should only be applied to the real process, not to an LWP, because | |
2859 | of the check for parent-process. If we need this to work for an | |
2860 | LWP, it needs some more logic. */ | |
c906108c | 2861 | |
c3f6f71d | 2862 | static void |
fba45db2 | 2863 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
2864 | { |
2865 | int parent_pid; | |
c906108c | 2866 | |
c3f6f71d | 2867 | parent_pid = proc_parent_pid (pi); |
c3f6f71d | 2868 | if (!proc_kill (pi, SIGKILL)) |
103b3ef5 | 2869 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d | 2870 | destroy_procinfo (pi); |
c906108c | 2871 | |
c3f6f71d JM |
2872 | /* If pi is GDB's child, wait for it to die. */ |
2873 | if (parent_pid == getpid ()) | |
19958708 | 2874 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
2875 | Should we check the returned event? */ |
2876 | { | |
0d06e24b | 2877 | #if 0 |
c3f6f71d | 2878 | int status, ret; |
c906108c | 2879 | |
c3f6f71d JM |
2880 | ret = waitpid (pi->pid, &status, 0); |
2881 | #else | |
2882 | wait (NULL); | |
2883 | #endif | |
2884 | } | |
2885 | } | |
c906108c | 2886 | |
77382aee PA |
2887 | /* We're done debugging it, and we want it to go away. Then we want |
2888 | GDB to forget all about it. */ | |
c906108c | 2889 | |
19958708 | 2890 | static void |
7d85a9c0 | 2891 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 2892 | { |
39f77062 | 2893 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 2894 | { |
0df8b418 | 2895 | /* Find procinfo for main process. */ |
dfd4cc63 | 2896 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 2897 | |
c3f6f71d JM |
2898 | if (pi) |
2899 | unconditionally_kill_inferior (pi); | |
bc1e6c81 | 2900 | target_mourn_inferior (inferior_ptid); |
c906108c | 2901 | } |
c3f6f71d JM |
2902 | } |
2903 | ||
77382aee | 2904 | /* Forget we ever debugged this thing! */ |
c906108c | 2905 | |
19958708 | 2906 | static void |
136d6dae | 2907 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
2908 | { |
2909 | procinfo *pi; | |
c906108c | 2910 | |
39f77062 | 2911 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 2912 | { |
0df8b418 | 2913 | /* Find procinfo for main process. */ |
dfd4cc63 | 2914 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2915 | if (pi) |
2916 | destroy_procinfo (pi); | |
c906108c | 2917 | } |
6a3cb8e8 PA |
2918 | |
2919 | generic_mourn_inferior (); | |
8181d85f | 2920 | |
6a3cb8e8 | 2921 | inf_child_maybe_unpush_target (ops); |
c3f6f71d | 2922 | } |
c906108c | 2923 | |
77382aee PA |
2924 | /* When GDB forks to create a runnable inferior process, this function |
2925 | is called on the parent side of the fork. It's job is to do | |
2926 | whatever is necessary to make the child ready to be debugged, and | |
2927 | then wait for the child to synchronize. */ | |
c906108c | 2928 | |
19958708 | 2929 | static void |
28439f5e | 2930 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
2931 | { |
2932 | procinfo *pi; | |
44122162 | 2933 | sigset_t signals; |
c3f6f71d | 2934 | int fail; |
2689673f | 2935 | int lwpid; |
c906108c | 2936 | |
c3f6f71d JM |
2937 | /* This routine called on the parent side (GDB side) |
2938 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
2939 | if (!target_is_pushed (ops)) |
2940 | push_target (ops); | |
c906108c | 2941 | |
c3f6f71d | 2942 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 2943 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
2944 | |
2945 | if (!open_procinfo_files (pi, FD_CTL)) | |
2946 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
2947 | ||
2948 | /* | |
2949 | xmalloc // done | |
2950 | open_procinfo_files // done | |
2951 | link list // done | |
2952 | prfillset (trace) | |
2953 | procfs_notice_signals | |
2954 | prfillset (fault) | |
2955 | prdelset (FLTPAGE) | |
2956 | PIOCWSTOP | |
2957 | PIOCSFAULT | |
2958 | */ | |
2959 | ||
77382aee | 2960 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
2961 | if (!(proc_flags (pi) & PR_STOPPED) && |
2962 | !(proc_wait_for_stop (pi))) | |
2963 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
2964 | ||
2965 | /* Save some of the /proc state to be restored if we detach. */ | |
2966 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 2967 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
2968 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
2969 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
2970 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2971 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
2972 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2973 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 2974 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 2975 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 2976 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2977 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
2978 | ||
c3f6f71d JM |
2979 | if ((fail = procfs_debug_inferior (pi)) != 0) |
2980 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
2981 | ||
0d06e24b JM |
2982 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
2983 | and possibly even turning ON kill-on-last-close at this point. But | |
2984 | I can't make that change without careful testing which I don't have | |
2985 | time to do right now... */ | |
c3f6f71d JM |
2986 | /* Turn on run-on-last-close flag so that the child |
2987 | will die if GDB goes away for some reason. */ | |
2988 | if (!proc_set_run_on_last_close (pi)) | |
2989 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
2990 | ||
2689673f PA |
2991 | /* We now have have access to the lwpid of the main thread/lwp. */ |
2992 | lwpid = proc_get_current_thread (pi); | |
2993 | ||
2994 | /* Create a procinfo for the main lwp. */ | |
2995 | create_procinfo (pid, lwpid); | |
2996 | ||
2997 | /* We already have a main thread registered in the thread table at | |
2998 | this point, but it didn't have any lwp info yet. Notify the core | |
2999 | about it. This changes inferior_ptid as well. */ | |
3000 | thread_change_ptid (pid_to_ptid (pid), | |
793e1c06 | 3001 | ptid_build (pid, lwpid, 0)); |
c906108c | 3002 | |
2090129c | 3003 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c3f6f71d | 3004 | } |
c906108c | 3005 | |
77382aee PA |
3006 | /* When GDB forks to create a new process, this function is called on |
3007 | the child side of the fork before GDB exec's the user program. Its | |
3008 | job is to make the child minimally debuggable, so that the parent | |
3009 | GDB process can connect to the child and take over. This function | |
3010 | should do only the minimum to make that possible, and to | |
3011 | synchronize with the parent process. The parent process should | |
3012 | take care of the details. */ | |
c3f6f71d JM |
3013 | |
3014 | static void | |
fba45db2 | 3015 | procfs_set_exec_trap (void) |
c3f6f71d JM |
3016 | { |
3017 | /* This routine called on the child side (inferior side) | |
3018 | after GDB forks the inferior. It must use only local variables, | |
3019 | because it may be sharing data space with its parent. */ | |
c906108c | 3020 | |
c3f6f71d | 3021 | procinfo *pi; |
37de36c6 | 3022 | sysset_t *exitset; |
c906108c | 3023 | |
c3f6f71d | 3024 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 3025 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 3026 | |
c3f6f71d JM |
3027 | if (open_procinfo_files (pi, FD_CTL) == 0) |
3028 | { | |
3029 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
3030 | gdb_flush (gdb_stderr); | |
77382aee PA |
3031 | /* No need to call "dead_procinfo", because we're going to |
3032 | exit. */ | |
c3f6f71d JM |
3033 | _exit (127); |
3034 | } | |
c906108c | 3035 | |
44122162 | 3036 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
3037 | /* GW: Rationale... |
3038 | Not all systems with /proc have all the exec* syscalls with the same | |
3039 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 3040 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 3041 | |
37de36c6 | 3042 | exitset = sysset_t_alloc (pi); |
44122162 | 3043 | premptyset (exitset); |
c3f6f71d | 3044 | #ifdef SYS_exec |
44122162 | 3045 | praddset (exitset, SYS_exec); |
c906108c | 3046 | #endif |
44122162 | 3047 | praddset (exitset, SYS_execve); |
37de36c6 KB |
3048 | |
3049 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 3050 | { |
c3f6f71d JM |
3051 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
3052 | gdb_flush (gdb_stderr); | |
3053 | _exit (127); | |
c906108c | 3054 | } |
c3f6f71d | 3055 | |
0df8b418 | 3056 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
3057 | /* Turn off inherit on fork flag so that all grand-children |
3058 | of gdb start with tracing flags cleared. */ | |
3059 | if (!proc_unset_inherit_on_fork (pi)) | |
3060 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
3061 | ||
3062 | /* Turn off run on last close flag, so that the child process | |
3063 | cannot run away just because we close our handle on it. | |
3064 | We want it to wait for the parent to attach. */ | |
3065 | if (!proc_unset_run_on_last_close (pi)) | |
3066 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
3067 | ||
19958708 | 3068 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 3069 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 3070 | /*destroy_procinfo (pi);*/ |
c906108c | 3071 | } |
c906108c | 3072 | |
77382aee PA |
3073 | /* This function is called BEFORE gdb forks the inferior process. Its |
3074 | only real responsibility is to set things up for the fork, and tell | |
3075 | GDB which two functions to call after the fork (one for the parent, | |
3076 | and one for the child). | |
3077 | ||
3078 | This function does a complicated search for a unix shell program, | |
3079 | which it then uses to parse arguments and environment variables to | |
3080 | be sent to the child. I wonder whether this code could not be | |
3081 | abstracted out and shared with other unix targets such as | |
3082 | inf-ptrace? */ | |
c906108c SS |
3083 | |
3084 | static void | |
7c5ded6a SDJ |
3085 | procfs_create_inferior (struct target_ops *ops, const char *exec_file, |
3086 | const std::string &allargs, char **env, int from_tty) | |
c906108c SS |
3087 | { |
3088 | char *shell_file = getenv ("SHELL"); | |
3089 | char *tryname; | |
28439f5e PA |
3090 | int pid; |
3091 | ||
c906108c SS |
3092 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
3093 | { | |
3094 | ||
3095 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
3096 | just do this the normal way (via execlp, which operates by |
3097 | attempting an exec for each element of the PATH until it | |
3098 | finds one which succeeds), then there will be an exec for | |
3099 | each failed attempt, each of which will cause a PR_SYSEXIT | |
3100 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
3101 | for these failed execs with the ones for successful execs | |
3102 | (whether the exec has succeeded is stored at that time in the | |
3103 | carry bit or some such architecture-specific and | |
3104 | non-ABI-specified place). | |
3105 | ||
3106 | So I can't think of anything better than to search the PATH | |
3107 | now. This has several disadvantages: (1) There is a race | |
3108 | condition; if we find a file now and it is deleted before we | |
3109 | exec it, we lose, even if the deletion leaves a valid file | |
3110 | further down in the PATH, (2) there is no way to know exactly | |
3111 | what an executable (in the sense of "capable of being | |
3112 | exec'd") file is. Using access() loses because it may lose | |
3113 | if the caller is the superuser; failing to use it loses if | |
3114 | there are ACLs or some such. */ | |
c906108c | 3115 | |
995816ba PA |
3116 | const char *p; |
3117 | const char *p1; | |
c906108c | 3118 | /* FIXME-maybe: might want "set path" command so user can change what |
c3f6f71d | 3119 | path is used from within GDB. */ |
995816ba | 3120 | const char *path = getenv ("PATH"); |
c906108c SS |
3121 | int len; |
3122 | struct stat statbuf; | |
3123 | ||
3124 | if (path == NULL) | |
3125 | path = "/bin:/usr/bin"; | |
3126 | ||
b196bc4c | 3127 | tryname = (char *) alloca (strlen (path) + strlen (shell_file) + 2); |
c3f6f71d | 3128 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
3129 | { |
3130 | p1 = strchr (p, ':'); | |
3131 | if (p1 != NULL) | |
3132 | len = p1 - p; | |
3133 | else | |
3134 | len = strlen (p); | |
3135 | strncpy (tryname, p, len); | |
3136 | tryname[len] = '\0'; | |
3137 | strcat (tryname, "/"); | |
3138 | strcat (tryname, shell_file); | |
3139 | if (access (tryname, X_OK) < 0) | |
3140 | continue; | |
3141 | if (stat (tryname, &statbuf) < 0) | |
3142 | continue; | |
3143 | if (!S_ISREG (statbuf.st_mode)) | |
3144 | /* We certainly need to reject directories. I'm not quite | |
3145 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
3146 | that people want to exec() these things. */ | |
3147 | continue; | |
3148 | break; | |
3149 | } | |
3150 | if (p == NULL) | |
3151 | /* Not found. This must be an error rather than merely passing | |
3152 | the file to execlp(), because execlp() would try all the | |
3153 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 3154 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 3155 | __LINE__, shell_file); |
c906108c SS |
3156 | |
3157 | shell_file = tryname; | |
3158 | } | |
3159 | ||
28439f5e | 3160 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 3161 | NULL, NULL, shell_file, NULL); |
28439f5e | 3162 | |
2090129c SDJ |
3163 | /* We have something that executes now. We'll be running through |
3164 | the shell at this point (if startup-with-shell is true), but the | |
3165 | pid shouldn't change. */ | |
3166 | add_thread_silent (pid_to_ptid (pid)); | |
3167 | ||
28439f5e | 3168 | procfs_init_inferior (ops, pid); |
27087a3d JB |
3169 | } |
3170 | ||
3171 | /* An observer for the "inferior_created" event. */ | |
c906108c | 3172 | |
27087a3d JB |
3173 | static void |
3174 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
3175 | { | |
c906108c SS |
3176 | } |
3177 | ||
e8032dde | 3178 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 3179 | |
c3f6f71d | 3180 | static int |
fba45db2 | 3181 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 3182 | { |
dfd4cc63 | 3183 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 3184 | |
2689673f | 3185 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 3186 | add_thread (gdb_threadid); |
c906108c | 3187 | |
c3f6f71d JM |
3188 | return 0; |
3189 | } | |
3190 | ||
77382aee PA |
3191 | /* Query all the threads that the target knows about, and give them |
3192 | back to GDB to add to its list. */ | |
c3f6f71d | 3193 | |
d3581e61 | 3194 | static void |
e8032dde | 3195 | procfs_update_thread_list (struct target_ops *ops) |
c3f6f71d JM |
3196 | { |
3197 | procinfo *pi; | |
3198 | ||
e8032dde PA |
3199 | prune_threads (); |
3200 | ||
0df8b418 | 3201 | /* Find procinfo for main process. */ |
dfd4cc63 | 3202 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3203 | proc_update_threads (pi); |
3204 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
3205 | } |
3206 | ||
77382aee PA |
3207 | /* Return true if the thread is still 'alive'. This guy doesn't |
3208 | really seem to be doing his job. Got to investigate how to tell | |
3209 | when a thread is really gone. */ | |
c906108c | 3210 | |
c906108c | 3211 | static int |
28439f5e | 3212 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 3213 | { |
c3f6f71d JM |
3214 | int proc, thread; |
3215 | procinfo *pi; | |
c906108c | 3216 | |
dfd4cc63 LM |
3217 | proc = ptid_get_pid (ptid); |
3218 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 3219 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
3220 | if ((pi = find_procinfo (proc, thread)) == NULL) |
3221 | return 0; | |
3222 | ||
3223 | /* If I can't get its status, it ain't alive! | |
3224 | What's more, I need to forget about it! */ | |
3225 | if (!proc_get_status (pi)) | |
3226 | { | |
3227 | destroy_procinfo (pi); | |
3228 | return 0; | |
3229 | } | |
77382aee PA |
3230 | /* I couldn't have got its status if it weren't alive, so it's |
3231 | alive. */ | |
c3f6f71d | 3232 | return 1; |
c906108c | 3233 | } |
c3f6f71d | 3234 | |
77382aee PA |
3235 | /* Convert PTID to a string. Returns the string in a static |
3236 | buffer. */ | |
c3f6f71d | 3237 | |
7a114964 | 3238 | static const char * |
117de6a9 | 3239 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
3240 | { |
3241 | static char buf[80]; | |
c3f6f71d | 3242 | |
dfd4cc63 LM |
3243 | if (ptid_get_lwp (ptid) == 0) |
3244 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 3245 | else |
dfd4cc63 | 3246 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
3247 | |
3248 | return buf; | |
c3f6f71d JM |
3249 | } |
3250 | ||
77382aee | 3251 | /* Insert a watchpoint. */ |
c3f6f71d | 3252 | |
a0911fd0 | 3253 | static int |
39f77062 | 3254 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 3255 | int after) |
c906108c | 3256 | { |
c3f6f71d | 3257 | int pflags = 0; |
19958708 | 3258 | procinfo *pi; |
c3f6f71d | 3259 | |
dfd4cc63 LM |
3260 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
3261 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
3262 | 0); | |
c3f6f71d | 3263 | |
0df8b418 MS |
3264 | /* Translate from GDB's flags to /proc's. */ |
3265 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 3266 | { |
0df8b418 | 3267 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
3268 | case hw_write: /* default watchpoint (write) */ |
3269 | pflags = WRITE_WATCHFLAG; | |
3270 | break; | |
3271 | case hw_read: /* read watchpoint */ | |
3272 | pflags = READ_WATCHFLAG; | |
3273 | break; | |
3274 | case hw_access: /* access watchpoint */ | |
3275 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
3276 | break; | |
3277 | case hw_execute: /* execution HW breakpoint */ | |
3278 | pflags = EXEC_WATCHFLAG; | |
3279 | break; | |
0df8b418 | 3280 | default: /* Something weird. Return error. */ |
c906108c | 3281 | return -1; |
c3f6f71d | 3282 | } |
0df8b418 | 3283 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
3284 | pflags |= AFTER_WATCHFLAG; |
3285 | } | |
3286 | ||
3287 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
3288 | { | |
0df8b418 | 3289 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
3290 | return -1; /* fail */ |
3291 | /* GDB may try to remove the same watchpoint twice. | |
3292 | If a remove request returns no match, don't error. */ | |
c906108c | 3293 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
3294 | return 0; /* ignore */ |
3295 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c SS |
3296 | } |
3297 | return 0; | |
3298 | } | |
3299 | ||
1e03ad20 KB |
3300 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
3301 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
3302 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
3303 | far. | |
19958708 | 3304 | |
1e03ad20 KB |
3305 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
3306 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 3307 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
3308 | |
3309 | static int | |
5461485a | 3310 | procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f SM |
3311 | enum bptype type, |
3312 | int cnt, int othertype) | |
1e03ad20 | 3313 | { |
1e03ad20 KB |
3314 | /* Due to the way that proc_set_watchpoint() is implemented, host |
3315 | and target pointers must be of the same size. If they are not, | |
3316 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
3317 | fact that proc_set_watchpoint() calls |
3318 | procfs_address_to_host_pointer(); a close inspection of | |
3319 | procfs_address_to_host_pointer will reveal that an internal error | |
3320 | will be generated when the host and target pointer sizes are | |
3321 | different. */ | |
f5656ead | 3322 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 3323 | |
4e906f53 | 3324 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
3325 | return 0; |
3326 | ||
3327 | /* Other tests here??? */ | |
3328 | ||
3329 | return 1; | |
1e03ad20 KB |
3330 | } |
3331 | ||
77382aee PA |
3332 | /* Returns non-zero if process is stopped on a hardware watchpoint |
3333 | fault, else returns zero. */ | |
c3f6f71d | 3334 | |
25513619 | 3335 | static int |
6a109b6b | 3336 | procfs_stopped_by_watchpoint (struct target_ops *ops) |
c906108c | 3337 | { |
c3f6f71d | 3338 | procinfo *pi; |
c906108c | 3339 | |
dfd4cc63 | 3340 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 3341 | |
c3f6f71d | 3342 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3343 | { |
c3f6f71d | 3344 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 3345 | { |
c3f6f71d JM |
3346 | if (proc_what (pi) == FLTWATCH) |
3347 | return 1; | |
c3f6f71d | 3348 | } |
c906108c SS |
3349 | } |
3350 | return 0; | |
3351 | } | |
c906108c | 3352 | |
77382aee PA |
3353 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
3354 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
3355 | address. This function is only called if | |
3356 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
3357 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
3358 | |
3359 | static int | |
3360 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
3361 | { | |
3362 | procinfo *pi; | |
3363 | ||
dfd4cc63 | 3364 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
3365 | return proc_watchpoint_address (pi, addr); |
3366 | } | |
3367 | ||
25513619 | 3368 | static int |
7bb99c53 | 3369 | procfs_insert_watchpoint (struct target_ops *self, |
f486487f SM |
3370 | CORE_ADDR addr, int len, |
3371 | enum target_hw_bp_type type, | |
0cf6dd15 | 3372 | struct expression *cond) |
25513619 | 3373 | { |
d92524f1 | 3374 | if (!target_have_steppable_watchpoint |
f5656ead | 3375 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
3376 | { |
3377 | /* When a hardware watchpoint fires off the PC will be left at | |
3378 | the instruction following the one which caused the | |
3379 | watchpoint. It will *NOT* be necessary for GDB to step over | |
3380 | the watchpoint. */ | |
3381 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
3382 | } | |
3383 | else | |
3384 | { | |
3385 | /* When a hardware watchpoint fires off the PC will be left at | |
3386 | the instruction which caused the watchpoint. It will be | |
3387 | necessary for GDB to step over the watchpoint. */ | |
3388 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
3389 | } | |
3390 | } | |
3391 | ||
3392 | static int | |
11b5219a | 3393 | procfs_remove_watchpoint (struct target_ops *self, |
f486487f SM |
3394 | CORE_ADDR addr, int len, |
3395 | enum target_hw_bp_type type, | |
0cf6dd15 | 3396 | struct expression *cond) |
25513619 PA |
3397 | { |
3398 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
3399 | } | |
3400 | ||
3401 | static int | |
31568a15 TT |
3402 | procfs_region_ok_for_hw_watchpoint (struct target_ops *self, |
3403 | CORE_ADDR addr, int len) | |
25513619 PA |
3404 | { |
3405 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
3406 | system can support "thousands" of hardware watchpoints, but gives | |
3407 | no method for finding out how many; It doesn't say anything about | |
3408 | the allowed size for the watched area either. So we just tell | |
3409 | GDB 'yes'. */ | |
3410 | return 1; | |
3411 | } | |
3412 | ||
77382aee PA |
3413 | /* Memory Mappings Functions: */ |
3414 | ||
3415 | /* Call a callback function once for each mapping, passing it the | |
3416 | mapping, an optional secondary callback function, and some optional | |
3417 | opaque data. Quit and return the first non-zero value returned | |
3418 | from the callback. | |
3419 | ||
3420 | PI is the procinfo struct for the process to be mapped. FUNC is | |
3421 | the callback function to be called by this iterator. DATA is the | |
3422 | optional opaque data to be passed to the callback function. | |
3423 | CHILD_FUNC is the optional secondary function pointer to be passed | |
3424 | to the child function. Returns the first non-zero return value | |
3425 | from the callback function, or zero. */ | |
831e682e MS |
3426 | |
3427 | static int | |
b8edc417 | 3428 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 3429 | void *data, |
19958708 | 3430 | int (*func) (struct prmap *map, |
b8edc417 | 3431 | find_memory_region_ftype child_func, |
831e682e MS |
3432 | void *data)) |
3433 | { | |
3434 | char pathname[MAX_PROC_NAME_SIZE]; | |
3435 | struct prmap *prmaps; | |
3436 | struct prmap *prmap; | |
3437 | int funcstat; | |
831e682e | 3438 | int nmap; |
831e682e | 3439 | struct stat sbuf; |
831e682e | 3440 | |
19958708 | 3441 | /* Get the number of mappings, allocate space, |
831e682e | 3442 | and read the mappings into prmaps. */ |
0df8b418 | 3443 | /* Open map fd. */ |
831e682e | 3444 | sprintf (pathname, "/proc/%d/map", pi->pid); |
831e682e | 3445 | |
5dc1a704 TT |
3446 | scoped_fd map_fd (open (pathname, O_RDONLY)); |
3447 | if (map_fd.get () < 0) | |
3448 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
831e682e | 3449 | |
19958708 | 3450 | /* Use stat to determine the file size, and compute |
831e682e | 3451 | the number of prmap_t objects it contains. */ |
5dc1a704 | 3452 | if (fstat (map_fd.get (), &sbuf) != 0) |
831e682e MS |
3453 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); |
3454 | ||
3455 | nmap = sbuf.st_size / sizeof (prmap_t); | |
3456 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5dc1a704 | 3457 | if (read (map_fd.get (), (char *) prmaps, nmap * sizeof (*prmaps)) |
831e682e MS |
3458 | != (nmap * sizeof (*prmaps))) |
3459 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
831e682e MS |
3460 | |
3461 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
3462 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5dc1a704 | 3463 | return funcstat; |
831e682e MS |
3464 | |
3465 | return 0; | |
3466 | } | |
3467 | ||
77382aee | 3468 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 3469 | function for each memory region. |
77382aee | 3470 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
3471 | |
3472 | static int | |
19958708 | 3473 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 3474 | find_memory_region_ftype func, void *data) |
be4d1333 | 3475 | { |
bf75638e | 3476 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 3477 | map->pr_size, |
be4d1333 MS |
3478 | (map->pr_mflags & MA_READ) != 0, |
3479 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 3480 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 3481 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
3482 | data); |
3483 | } | |
3484 | ||
77382aee PA |
3485 | /* External interface. Calls a callback function once for each |
3486 | mapped memory region in the child process, passing as arguments: | |
3487 | ||
3488 | CORE_ADDR virtual_address, | |
3489 | unsigned long size, | |
3490 | int read, TRUE if region is readable by the child | |
3491 | int write, TRUE if region is writable by the child | |
3492 | int execute TRUE if region is executable by the child. | |
3493 | ||
3494 | Stops iterating and returns the first non-zero value returned by | |
3495 | the callback. */ | |
be4d1333 MS |
3496 | |
3497 | static int | |
2e73927c TT |
3498 | proc_find_memory_regions (struct target_ops *self, |
3499 | find_memory_region_ftype func, void *data) | |
be4d1333 | 3500 | { |
dfd4cc63 | 3501 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3502 | |
19958708 | 3503 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
3504 | find_memory_regions_callback); |
3505 | } | |
3506 | ||
77382aee | 3507 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 3508 | |
388faa48 | 3509 | static char * |
5ae5f592 | 3510 | mappingflags (long flags) |
388faa48 MS |
3511 | { |
3512 | static char asciiflags[8]; | |
3513 | ||
3514 | strcpy (asciiflags, "-------"); | |
388faa48 MS |
3515 | if (flags & MA_STACK) |
3516 | asciiflags[1] = 's'; | |
3517 | if (flags & MA_BREAK) | |
3518 | asciiflags[2] = 'b'; | |
3519 | if (flags & MA_SHARED) | |
3520 | asciiflags[3] = 's'; | |
3521 | if (flags & MA_READ) | |
3522 | asciiflags[4] = 'r'; | |
3523 | if (flags & MA_WRITE) | |
3524 | asciiflags[5] = 'w'; | |
3525 | if (flags & MA_EXEC) | |
3526 | asciiflags[6] = 'x'; | |
3527 | return (asciiflags); | |
3528 | } | |
3529 | ||
77382aee PA |
3530 | /* Callback function, does the actual work for 'info proc |
3531 | mappings'. */ | |
831e682e | 3532 | |
831e682e | 3533 | static int |
b8edc417 | 3534 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 3535 | void *unused) |
831e682e | 3536 | { |
0b62613e | 3537 | unsigned int pr_off; |
831e682e | 3538 | |
0b62613e | 3539 | pr_off = (unsigned int) map->pr_offset; |
0b62613e | 3540 | |
f5656ead | 3541 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 3542 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
3543 | (unsigned long) map->pr_vaddr, |
3544 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3545 | (unsigned long) map->pr_size, |
0b62613e PA |
3546 | pr_off, |
3547 | mappingflags (map->pr_mflags)); | |
3548 | else | |
f6a96b83 | 3549 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
3550 | (unsigned long) map->pr_vaddr, |
3551 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3552 | (unsigned long) map->pr_size, |
0b62613e PA |
3553 | pr_off, |
3554 | mappingflags (map->pr_mflags)); | |
831e682e MS |
3555 | |
3556 | return 0; | |
3557 | } | |
3558 | ||
77382aee | 3559 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
3560 | |
3561 | static void | |
3562 | info_proc_mappings (procinfo *pi, int summary) | |
3563 | { | |
388faa48 | 3564 | if (summary) |
0df8b418 | 3565 | return; /* No output for summary mode. */ |
388faa48 | 3566 | |
a3f17187 | 3567 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 3568 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
3569 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
3570 | "Start Addr", | |
3571 | " End Addr", | |
3572 | " Size", | |
3573 | " Offset", | |
3574 | "Flags"); | |
3575 | else | |
3576 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3577 | "Start Addr", | |
3578 | " End Addr", | |
3579 | " Size", | |
3580 | " Offset", | |
3581 | "Flags"); | |
388faa48 | 3582 | |
831e682e | 3583 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
3584 | printf_filtered ("\n"); |
3585 | } | |
3586 | ||
77382aee | 3587 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
3588 | |
3589 | static void | |
7bc112c1 | 3590 | procfs_info_proc (struct target_ops *ops, const char *args, |
145b16a9 | 3591 | enum info_proc_what what) |
c906108c | 3592 | { |
c3f6f71d | 3593 | struct cleanup *old_chain; |
388faa48 MS |
3594 | procinfo *process = NULL; |
3595 | procinfo *thread = NULL; | |
388faa48 MS |
3596 | char *tmp = NULL; |
3597 | int pid = 0; | |
3598 | int tid = 0; | |
3599 | int mappings = 0; | |
c906108c | 3600 | |
145b16a9 UW |
3601 | switch (what) |
3602 | { | |
3603 | case IP_MINIMAL: | |
3604 | break; | |
3605 | ||
3606 | case IP_MAPPINGS: | |
3607 | case IP_ALL: | |
3608 | mappings = 1; | |
3609 | break; | |
3610 | ||
3611 | default: | |
3612 | error (_("Not supported on this target.")); | |
3613 | } | |
3614 | ||
c3f6f71d | 3615 | old_chain = make_cleanup (null_cleanup, 0); |
773a1edc | 3616 | gdb_argv built_argv (args); |
4fa7574e | 3617 | for (char *arg : built_argv) |
c3f6f71d | 3618 | { |
773a1edc | 3619 | if (isdigit (arg[0])) |
c3f6f71d | 3620 | { |
773a1edc | 3621 | pid = strtoul (arg, &tmp, 10); |
c3f6f71d JM |
3622 | if (*tmp == '/') |
3623 | tid = strtoul (++tmp, NULL, 10); | |
3624 | } | |
773a1edc | 3625 | else if (arg[0] == '/') |
c3f6f71d | 3626 | { |
773a1edc | 3627 | tid = strtoul (arg + 1, NULL, 10); |
c3f6f71d | 3628 | } |
c3f6f71d JM |
3629 | } |
3630 | if (pid == 0) | |
dfd4cc63 | 3631 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 3632 | if (pid == 0) |
8a3fe4f8 | 3633 | error (_("No current process: you must name one.")); |
c3f6f71d | 3634 | else |
c906108c | 3635 | { |
c3f6f71d | 3636 | /* Have pid, will travel. |
0df8b418 | 3637 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
3638 | process = find_procinfo (pid, 0); |
3639 | if (process == NULL) | |
3640 | { | |
19958708 | 3641 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
3642 | remember to close it again when finished. */ |
3643 | process = create_procinfo (pid, 0); | |
004527cb | 3644 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
3645 | if (!open_procinfo_files (process, FD_CTL)) |
3646 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
3647 | } | |
c906108c | 3648 | } |
c3f6f71d JM |
3649 | if (tid != 0) |
3650 | thread = create_procinfo (pid, tid); | |
3651 | ||
3652 | if (process) | |
3653 | { | |
a3f17187 | 3654 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
3655 | proc_prettyprint_flags (proc_flags (process), 1); |
3656 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
3657 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
3658 | if (proc_get_nthreads (process) > 1) | |
19958708 | 3659 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
3660 | proc_get_nthreads (process)); |
3661 | } | |
3662 | if (thread) | |
3663 | { | |
a3f17187 | 3664 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
3665 | proc_prettyprint_flags (proc_flags (thread), 1); |
3666 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
3667 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
3668 | } | |
3669 | ||
388faa48 MS |
3670 | if (mappings) |
3671 | { | |
3672 | info_proc_mappings (process, 0); | |
3673 | } | |
3674 | ||
c3f6f71d | 3675 | do_cleanups (old_chain); |
c906108c SS |
3676 | } |
3677 | ||
9185ddce JB |
3678 | /* Modify the status of the system call identified by SYSCALLNUM in |
3679 | the set of syscalls that are currently traced/debugged. | |
3680 | ||
3681 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 3682 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 3683 | |
0df8b418 | 3684 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
3685 | will be disabled. */ |
3686 | ||
3687 | static void | |
3688 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 3689 | int mode, int from_tty) |
9185ddce JB |
3690 | { |
3691 | sysset_t *sysset; | |
77382aee | 3692 | |
9185ddce JB |
3693 | if (entry_or_exit == PR_SYSENTRY) |
3694 | sysset = proc_get_traced_sysentry (pi, NULL); | |
3695 | else | |
3696 | sysset = proc_get_traced_sysexit (pi, NULL); | |
3697 | ||
3698 | if (sysset == NULL) | |
3699 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
3700 | ||
3701 | if (mode == FLAG_SET) | |
44122162 | 3702 | praddset (sysset, syscallnum); |
9185ddce | 3703 | else |
44122162 | 3704 | prdelset (sysset, syscallnum); |
9185ddce JB |
3705 | |
3706 | if (entry_or_exit == PR_SYSENTRY) | |
3707 | { | |
3708 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 3709 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
3710 | } |
3711 | else | |
3712 | { | |
3713 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 3714 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
3715 | } |
3716 | } | |
3717 | ||
c3f6f71d | 3718 | static void |
0b39b52e | 3719 | proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 3720 | { |
c3f6f71d | 3721 | procinfo *pi; |
c906108c | 3722 | |
dfd4cc63 | 3723 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 3724 | error (_("you must be debugging a process to use this command.")); |
c906108c | 3725 | |
c3f6f71d | 3726 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 3727 | error_no_arg (_("system call to trace")); |
c3f6f71d | 3728 | |
dfd4cc63 | 3729 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3730 | if (isdigit (args[0])) |
3731 | { | |
9185ddce | 3732 | const int syscallnum = atoi (args); |
c906108c | 3733 | |
9185ddce | 3734 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
3735 | } |
3736 | } | |
3737 | ||
19958708 | 3738 | static void |
0b39b52e | 3739 | proc_trace_sysentry_cmd (const char *args, int from_tty) |
c906108c | 3740 | { |
c3f6f71d JM |
3741 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
3742 | } | |
c906108c | 3743 | |
19958708 | 3744 | static void |
0b39b52e | 3745 | proc_trace_sysexit_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3746 | { |
3747 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 3748 | } |
c906108c | 3749 | |
19958708 | 3750 | static void |
0b39b52e | 3751 | proc_untrace_sysentry_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3752 | { |
3753 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
3754 | } | |
3755 | ||
19958708 | 3756 | static void |
0b39b52e | 3757 | proc_untrace_sysexit_cmd (const char *args, int from_tty) |
c906108c | 3758 | { |
c3f6f71d JM |
3759 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
3760 | } | |
c906108c | 3761 | |
c906108c | 3762 | void |
fba45db2 | 3763 | _initialize_procfs (void) |
c906108c | 3764 | { |
76727919 | 3765 | gdb::observers::inferior_created.attach (procfs_inferior_created); |
27087a3d | 3766 | |
19958708 | 3767 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 3768 | _("Give a trace of entries into the syscall.")); |
19958708 | 3769 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 3770 | _("Give a trace of exits from the syscall.")); |
19958708 | 3771 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 3772 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 3773 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 3774 | _("Cancel a trace of exits from the syscall.")); |
c1955e17 PA |
3775 | |
3776 | add_target (procfs_target ()); | |
c3f6f71d JM |
3777 | } |
3778 | ||
3779 | /* =================== END, GDB "MODULE" =================== */ | |
3780 | ||
3781 | ||
3782 | ||
77382aee PA |
3783 | /* miscellaneous stubs: */ |
3784 | ||
3785 | /* The following satisfy a few random symbols mostly created by the | |
3786 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 3787 | |
77382aee PA |
3788 | /* Return a pid for which we guarantee we will be able to find a |
3789 | 'live' procinfo. */ | |
c3f6f71d | 3790 | |
39f77062 | 3791 | ptid_t |
fba45db2 | 3792 | procfs_first_available (void) |
c3f6f71d | 3793 | { |
39f77062 | 3794 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 3795 | } |
be4d1333 MS |
3796 | |
3797 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
3798 | ||
3799 | static char * | |
19958708 | 3800 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 3801 | char *note_data, int *note_size, |
2ea28649 | 3802 | enum gdb_signal stop_signal) |
be4d1333 | 3803 | { |
594f7785 | 3804 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
3805 | gdb_gregset_t gregs; |
3806 | gdb_fpregset_t fpregs; | |
3807 | unsigned long merged_pid; | |
3808 | ||
dfd4cc63 | 3809 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 3810 | |
75125405 DJ |
3811 | /* This part is the old method for fetching registers. |
3812 | It should be replaced by the newer one using regsets | |
3813 | once it is implemented in this platform: | |
29082443 | 3814 | gdbarch_iterate_over_regset_sections(). */ |
75125405 | 3815 | |
2989a365 | 3816 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
75125405 DJ |
3817 | inferior_ptid = ptid; |
3818 | target_fetch_registers (regcache, -1); | |
3819 | ||
594f7785 | 3820 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
3821 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
3822 | note_data, | |
3823 | note_size, | |
19958708 | 3824 | merged_pid, |
65554fef MS |
3825 | stop_signal, |
3826 | &gregs); | |
594f7785 | 3827 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
3828 | note_data = (char *) elfcore_write_prfpreg (obfd, |
3829 | note_data, | |
3830 | note_size, | |
3831 | &fpregs, | |
3832 | sizeof (fpregs)); | |
75125405 | 3833 | |
be4d1333 MS |
3834 | return note_data; |
3835 | } | |
3836 | ||
3837 | struct procfs_corefile_thread_data { | |
3838 | bfd *obfd; | |
3839 | char *note_data; | |
3840 | int *note_size; | |
2ea28649 | 3841 | enum gdb_signal stop_signal; |
be4d1333 MS |
3842 | }; |
3843 | ||
3844 | static int | |
65554fef | 3845 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 | 3846 | { |
b196bc4c RO |
3847 | struct procfs_corefile_thread_data *args |
3848 | = (struct procfs_corefile_thread_data *) data; | |
be4d1333 | 3849 | |
2689673f | 3850 | if (pi != NULL) |
be4d1333 | 3851 | { |
dfd4cc63 | 3852 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 3853 | |
75125405 | 3854 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 3855 | args->note_data, |
2020b7ab PA |
3856 | args->note_size, |
3857 | args->stop_signal); | |
be4d1333 MS |
3858 | } |
3859 | return 0; | |
3860 | } | |
3861 | ||
a223f1e7 JB |
3862 | static int |
3863 | find_signalled_thread (struct thread_info *info, void *data) | |
3864 | { | |
a493e3e2 | 3865 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
3866 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
3867 | return 1; | |
3868 | ||
3869 | return 0; | |
3870 | } | |
3871 | ||
2ea28649 | 3872 | static enum gdb_signal |
a223f1e7 JB |
3873 | find_stop_signal (void) |
3874 | { | |
3875 | struct thread_info *info = | |
3876 | iterate_over_threads (find_signalled_thread, NULL); | |
3877 | ||
3878 | if (info) | |
16c381f0 | 3879 | return info->suspend.stop_signal; |
a223f1e7 | 3880 | else |
a493e3e2 | 3881 | return GDB_SIGNAL_0; |
a223f1e7 JB |
3882 | } |
3883 | ||
be4d1333 | 3884 | static char * |
fc6691b2 | 3885 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 MS |
3886 | { |
3887 | struct cleanup *old_chain; | |
3888 | gdb_gregset_t gregs; | |
3889 | gdb_fpregset_t fpregs; | |
3890 | char fname[16] = {'\0'}; | |
3891 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 3892 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3893 | char *note_data = NULL; |
6dbdc4a3 | 3894 | char *inf_args; |
be4d1333 | 3895 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 3896 | gdb_byte *auxv; |
4e73f23d | 3897 | int auxv_len; |
2ea28649 | 3898 | enum gdb_signal stop_signal; |
be4d1333 MS |
3899 | |
3900 | if (get_exec_file (0)) | |
3901 | { | |
9f37bbcc | 3902 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
3903 | fname[sizeof (fname) - 1] = 0; |
3904 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
3905 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
3906 | |
3907 | inf_args = get_inferior_args (); | |
3908 | if (inf_args && *inf_args && | |
3909 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 3910 | { |
19958708 | 3911 | strncat (psargs, " ", |
be4d1333 | 3912 | sizeof (psargs) - strlen (psargs)); |
19958708 | 3913 | strncat (psargs, inf_args, |
be4d1333 MS |
3914 | sizeof (psargs) - strlen (psargs)); |
3915 | } | |
3916 | } | |
3917 | ||
19958708 RM |
3918 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
3919 | note_data, | |
3920 | note_size, | |
3921 | fname, | |
be4d1333 MS |
3922 | psargs); |
3923 | ||
651c8d2d PA |
3924 | stop_signal = find_stop_signal (); |
3925 | ||
3e3420f6 PA |
3926 | fill_gregset (get_current_regcache (), &gregs, -1); |
3927 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 3928 | ptid_get_pid (inferior_ptid), |
3e3420f6 | 3929 | stop_signal, &gregs); |
3e3420f6 | 3930 | |
be4d1333 MS |
3931 | thread_args.obfd = obfd; |
3932 | thread_args.note_data = note_data; | |
3933 | thread_args.note_size = note_size; | |
651c8d2d | 3934 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
3935 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
3936 | &thread_args); | |
2689673f | 3937 | note_data = thread_args.note_data; |
be4d1333 | 3938 | |
13547ab6 DJ |
3939 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
3940 | NULL, &auxv); | |
4e73f23d RM |
3941 | if (auxv_len > 0) |
3942 | { | |
3943 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
3944 | "CORE", NT_AUXV, auxv, auxv_len); | |
3945 | xfree (auxv); | |
3946 | } | |
3947 | ||
be4d1333 MS |
3948 | return note_data; |
3949 | } | |
be4d1333 | 3950 | /* =================== END GCORE .NOTE "MODULE" =================== */ |