]>
Commit | Line | Data |
---|---|---|
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 | ||
d1a7880c | 174 | struct target_ops * |
28439f5e | 175 | procfs_target (void) |
c3f6f71d | 176 | { |
28439f5e PA |
177 | struct target_ops *t = inf_child_target (); |
178 | ||
77382aee PA |
179 | t->to_create_inferior = procfs_create_inferior; |
180 | t->to_kill = procfs_kill_inferior; | |
181 | t->to_mourn_inferior = procfs_mourn_inferior; | |
182 | t->to_attach = procfs_attach; | |
183 | t->to_detach = procfs_detach; | |
184 | t->to_wait = procfs_wait; | |
185 | t->to_resume = procfs_resume; | |
186 | t->to_fetch_registers = procfs_fetch_registers; | |
187 | t->to_store_registers = procfs_store_registers; | |
188 | t->to_xfer_partial = procfs_xfer_partial; | |
2455069d | 189 | t->to_pass_signals = procfs_pass_signals; |
77382aee | 190 | t->to_files_info = procfs_files_info; |
28439f5e | 191 | |
e8032dde | 192 | t->to_update_thread_list = procfs_update_thread_list; |
77382aee PA |
193 | t->to_thread_alive = procfs_thread_alive; |
194 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 195 | |
77382aee | 196 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
197 | t->to_find_memory_regions = proc_find_memory_regions; |
198 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 199 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
200 | |
201 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 202 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
203 | #endif |
204 | ||
b5c8fcb1 PA |
205 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; |
206 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
207 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
208 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
209 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; | |
210 | t->to_stopped_data_address = procfs_stopped_data_address; | |
211 | ||
77382aee | 212 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
213 | |
214 | return t; | |
c3f6f71d | 215 | } |
c906108c | 216 | |
c3f6f71d JM |
217 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
218 | ||
77382aee PA |
219 | /* World Unification: |
220 | ||
221 | Put any typedefs, defines etc. here that are required for the | |
222 | unification of code that handles different versions of /proc. */ | |
c3f6f71d | 223 | |
44122162 RO |
224 | enum { READ_WATCHFLAG = WA_READ, |
225 | WRITE_WATCHFLAG = WA_WRITE, | |
226 | EXEC_WATCHFLAG = WA_EXEC, | |
227 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
228 | }; | |
c3f6f71d JM |
229 | |
230 | ||
231 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
232 | ||
233 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
234 | ||
235 | /* The procinfo struct is a wrapper to hold all the state information | |
236 | concerning a /proc process. There should be exactly one procinfo | |
237 | for each process, and since GDB currently can debug only one | |
238 | process at a time, that means there should be only one procinfo. | |
239 | All of the LWP's of a process can be accessed indirectly thru the | |
240 | single process procinfo. | |
241 | ||
242 | However, against the day when GDB may debug more than one process, | |
243 | this data structure is kept in a list (which for now will hold no | |
244 | more than one member), and many functions will have a pointer to a | |
245 | procinfo as an argument. | |
246 | ||
247 | There will be a separate procinfo structure for use by the (not yet | |
248 | implemented) "info proc" command, so that we can print useful | |
249 | information about any random process without interfering with the | |
0df8b418 | 250 | inferior's procinfo information. */ |
c3f6f71d | 251 | |
c3f6f71d | 252 | /* format strings for /proc paths */ |
44122162 RO |
253 | #define MAIN_PROC_NAME_FMT "/proc/%d" |
254 | #define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
255 | #define AS_PROC_NAME_FMT "/proc/%d/as" | |
256 | #define MAP_PROC_NAME_FMT "/proc/%d/map" | |
257 | #define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
258 | #define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
c906108c | 259 | |
c3f6f71d JM |
260 | typedef struct procinfo { |
261 | struct procinfo *next; | |
262 | int pid; /* Process ID */ | |
263 | int tid; /* Thread/LWP id */ | |
c906108c | 264 | |
c3f6f71d JM |
265 | /* process state */ |
266 | int was_stopped; | |
267 | int ignore_next_sigstop; | |
c906108c | 268 | |
c3f6f71d | 269 | int ctl_fd; /* File descriptor for /proc control file */ |
c3f6f71d JM |
270 | int status_fd; /* File descriptor for /proc status file */ |
271 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 272 | |
c3f6f71d | 273 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 274 | |
c3f6f71d | 275 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
44122162 RO |
276 | sigset_t saved_sigset; /* Saved traced signal set */ |
277 | sigset_t saved_sighold; /* Saved held signal set */ | |
37de36c6 KB |
278 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
279 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 280 | |
44122162 | 281 | pstatus_t prstatus; /* Current process status info */ |
19958708 | 282 | |
c3f6f71d | 283 | struct procinfo *thread_list; |
c906108c | 284 | |
c3f6f71d JM |
285 | int status_valid : 1; |
286 | int gregs_valid : 1; | |
287 | int fpregs_valid : 1; | |
288 | int threads_valid: 1; | |
289 | } procinfo; | |
c906108c | 290 | |
c3f6f71d | 291 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 292 | |
c3f6f71d | 293 | /* Function prototypes for procinfo module: */ |
c906108c | 294 | |
a14ed312 KB |
295 | static procinfo *find_procinfo_or_die (int pid, int tid); |
296 | static procinfo *find_procinfo (int pid, int tid); | |
297 | static procinfo *create_procinfo (int pid, int tid); | |
44122162 | 298 | static void destroy_procinfo (procinfo *p); |
004527cb | 299 | static void do_destroy_procinfo_cleanup (void *); |
44122162 RO |
300 | static void dead_procinfo (procinfo *p, const char *msg, int killp); |
301 | static int open_procinfo_files (procinfo *p, int which); | |
302 | static void close_procinfo_files (procinfo *p); | |
303 | static sysset_t *sysset_t_alloc (procinfo *pi); | |
c906108c | 304 | |
e9ef4f39 | 305 | static int iterate_over_mappings |
b8edc417 JK |
306 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
307 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 308 | void *data)); |
e9ef4f39 | 309 | |
c3f6f71d | 310 | /* The head of the procinfo list: */ |
44122162 | 311 | static procinfo *procinfo_list; |
c906108c | 312 | |
77382aee PA |
313 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
314 | not found. */ | |
c906108c | 315 | |
19958708 | 316 | static procinfo * |
fba45db2 | 317 | find_procinfo (int pid, int tid) |
c5aa993b | 318 | { |
c3f6f71d | 319 | procinfo *pi; |
c906108c | 320 | |
c3f6f71d JM |
321 | for (pi = procinfo_list; pi; pi = pi->next) |
322 | if (pi->pid == pid) | |
323 | break; | |
c906108c | 324 | |
c3f6f71d JM |
325 | if (pi) |
326 | if (tid) | |
327 | { | |
328 | /* Don't check threads_valid. If we're updating the | |
329 | thread_list, we want to find whatever threads are already | |
330 | here. This means that in general it is the caller's | |
331 | responsibility to check threads_valid and update before | |
332 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 333 | thread. */ |
c3f6f71d JM |
334 | |
335 | for (pi = pi->thread_list; pi; pi = pi->next) | |
336 | if (pi->tid == tid) | |
337 | break; | |
338 | } | |
c906108c | 339 | |
c3f6f71d JM |
340 | return pi; |
341 | } | |
c906108c | 342 | |
77382aee | 343 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 344 | |
c3f6f71d | 345 | static procinfo * |
fba45db2 | 346 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
347 | { |
348 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 349 | |
c3f6f71d | 350 | if (pi == NULL) |
0fda6bd2 JM |
351 | { |
352 | if (tid) | |
3e43a32a MS |
353 | error (_("procfs: couldn't find pid %d " |
354 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
355 | pid, tid); |
356 | else | |
8a3fe4f8 | 357 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 358 | } |
c3f6f71d JM |
359 | return pi; |
360 | } | |
c906108c | 361 | |
77382aee PA |
362 | /* Wrapper for `open'. The appropriate open call is attempted; if |
363 | unsuccessful, it will be retried as many times as needed for the | |
364 | EAGAIN and EINTR conditions. | |
19958708 | 365 | |
77382aee PA |
366 | For other conditions, retry the open a limited number of times. In |
367 | addition, a short sleep is imposed prior to retrying the open. The | |
368 | reason for this sleep is to give the kernel a chance to catch up | |
369 | and create the file in question in the event that GDB "wins" the | |
370 | race to open a file before the kernel has created it. */ | |
19958708 | 371 | |
4d1bcd09 KB |
372 | static int |
373 | open_with_retry (const char *pathname, int flags) | |
374 | { | |
375 | int retries_remaining, status; | |
376 | ||
377 | retries_remaining = 2; | |
378 | ||
379 | while (1) | |
380 | { | |
381 | status = open (pathname, flags); | |
382 | ||
383 | if (status >= 0 || retries_remaining == 0) | |
384 | break; | |
385 | else if (errno != EINTR && errno != EAGAIN) | |
386 | { | |
387 | retries_remaining--; | |
388 | sleep (1); | |
389 | } | |
390 | } | |
391 | ||
392 | return status; | |
393 | } | |
394 | ||
44122162 RO |
395 | /* Open the file descriptor for the process or LWP. We only open the |
396 | control file descriptor; the others are opened lazily as needed. | |
77382aee | 397 | Returns the file descriptor, or zero for failure. */ |
c906108c | 398 | |
c3f6f71d | 399 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 400 | |
c3f6f71d | 401 | static int |
fba45db2 | 402 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d JM |
403 | { |
404 | char tmp[MAX_PROC_NAME_SIZE]; | |
405 | int fd; | |
406 | ||
77382aee PA |
407 | /* This function is getting ALMOST long enough to break up into |
408 | several. Here is some rationale: | |
409 | ||
77382aee PA |
410 | There are several file descriptors that may need to be open |
411 | for any given process or LWP. The ones we're intereted in are: | |
412 | - control (ctl) write-only change the state | |
413 | - status (status) read-only query the state | |
414 | - address space (as) read/write access memory | |
415 | - map (map) read-only virtual addr map | |
416 | Most of these are opened lazily as they are needed. | |
417 | The pathnames for the 'files' for an LWP look slightly | |
418 | different from those of a first-class process: | |
419 | Pathnames for a process (<proc-id>): | |
420 | /proc/<proc-id>/ctl | |
421 | /proc/<proc-id>/status | |
422 | /proc/<proc-id>/as | |
423 | /proc/<proc-id>/map | |
424 | Pathnames for an LWP (lwp-id): | |
425 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
426 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
427 | An LWP has no map or address space file descriptor, since | |
44122162 RO |
428 | the memory map and address space are shared by all LWPs. */ |
429 | ||
77382aee PA |
430 | /* In this case, there are several different file descriptors that |
431 | we might be asked to open. The control file descriptor will be | |
432 | opened early, but the others will be opened lazily as they are | |
433 | needed. */ | |
c3f6f71d JM |
434 | |
435 | strcpy (tmp, pi->pathname); | |
0df8b418 | 436 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
437 | case FD_CTL: |
438 | if (pi->tid) | |
439 | strcat (tmp, "/lwpctl"); | |
440 | else | |
441 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 442 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 443 | if (fd < 0) |
c3f6f71d JM |
444 | return 0; /* fail */ |
445 | pi->ctl_fd = fd; | |
446 | break; | |
447 | case FD_AS: | |
448 | if (pi->tid) | |
0df8b418 | 449 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 450 | strcat (tmp, "/as"); |
4d1bcd09 | 451 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 452 | if (fd < 0) |
c3f6f71d JM |
453 | return 0; /* fail */ |
454 | pi->as_fd = fd; | |
455 | break; | |
456 | case FD_STATUS: | |
457 | if (pi->tid) | |
458 | strcat (tmp, "/lwpstatus"); | |
459 | else | |
460 | strcat (tmp, "/status"); | |
4d1bcd09 | 461 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 462 | if (fd < 0) |
c3f6f71d JM |
463 | return 0; /* fail */ |
464 | pi->status_fd = fd; | |
465 | break; | |
466 | default: | |
467 | return 0; /* unknown file descriptor */ | |
468 | } | |
c906108c | 469 | |
c3f6f71d JM |
470 | return 1; /* success */ |
471 | } | |
c906108c | 472 | |
77382aee PA |
473 | /* Allocate a data structure and link it into the procinfo list. |
474 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
475 | pointer to new procinfo struct. */ | |
c906108c | 476 | |
c3f6f71d | 477 | static procinfo * |
fba45db2 | 478 | create_procinfo (int pid, int tid) |
c3f6f71d | 479 | { |
0b62613e | 480 | procinfo *pi, *parent = NULL; |
c906108c | 481 | |
0d06e24b | 482 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 483 | return pi; /* Already exists, nothing to do. */ |
c906108c | 484 | |
0df8b418 | 485 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
486 | if (tid != 0) |
487 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
488 | create it if it | |
0df8b418 | 489 | doesn't exist yet? */ |
c906108c | 490 | |
8d749320 | 491 | pi = XNEW (procinfo); |
c3f6f71d JM |
492 | memset (pi, 0, sizeof (procinfo)); |
493 | pi->pid = pid; | |
494 | pi->tid = tid; | |
c906108c | 495 | |
1d5e0602 KB |
496 | pi->saved_entryset = sysset_t_alloc (pi); |
497 | pi->saved_exitset = sysset_t_alloc (pi); | |
498 | ||
c3f6f71d JM |
499 | /* Chain into list. */ |
500 | if (tid == 0) | |
501 | { | |
502 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
503 | pi->next = procinfo_list; | |
504 | procinfo_list = pi; | |
505 | } | |
506 | else | |
507 | { | |
c3f6f71d | 508 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); |
c3f6f71d JM |
509 | pi->next = parent->thread_list; |
510 | parent->thread_list = pi; | |
511 | } | |
512 | return pi; | |
513 | } | |
c906108c | 514 | |
77382aee | 515 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 516 | |
c3f6f71d | 517 | static void |
fba45db2 | 518 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
519 | { |
520 | if (pi->ctl_fd > 0) | |
521 | close (pi->ctl_fd); | |
c3f6f71d JM |
522 | if (pi->as_fd > 0) |
523 | close (pi->as_fd); | |
524 | if (pi->status_fd > 0) | |
525 | close (pi->status_fd); | |
c3f6f71d JM |
526 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
527 | } | |
c906108c | 528 | |
77382aee | 529 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 530 | |
c3f6f71d | 531 | static void |
fba45db2 | 532 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
533 | { |
534 | procinfo *ptr; | |
535 | ||
77382aee | 536 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
537 | if (pi == *list) |
538 | *list = pi->next; | |
19958708 | 539 | else |
c3f6f71d JM |
540 | for (ptr = *list; ptr; ptr = ptr->next) |
541 | if (ptr->next == pi) | |
542 | { | |
543 | ptr->next = pi->next; | |
544 | break; | |
545 | } | |
7a292a7a | 546 | |
77382aee | 547 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 548 | close_procinfo_files (pi); |
7a292a7a | 549 | |
77382aee | 550 | /* Step three: free the memory. */ |
1d5e0602 KB |
551 | xfree (pi->saved_entryset); |
552 | xfree (pi->saved_exitset); | |
b8c9b27d | 553 | xfree (pi); |
c3f6f71d | 554 | } |
c906108c | 555 | |
c3f6f71d | 556 | static void |
fba45db2 | 557 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
558 | { |
559 | procinfo *tmp; | |
c906108c | 560 | |
0df8b418 | 561 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 562 | { |
0df8b418 | 563 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
564 | destroy_one_procinfo (&tmp->thread_list, pi); |
565 | } | |
0df8b418 | 566 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
567 | { |
568 | /* First destroy the children, if any; */ | |
569 | while (pi->thread_list != NULL) | |
570 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
571 | /* Then destroy the parent. Genocide!!! */ | |
572 | destroy_one_procinfo (&procinfo_list, pi); | |
573 | } | |
574 | } | |
c906108c | 575 | |
004527cb AC |
576 | static void |
577 | do_destroy_procinfo_cleanup (void *pi) | |
578 | { | |
b196bc4c | 579 | destroy_procinfo ((procinfo *) pi); |
004527cb AC |
580 | } |
581 | ||
c3f6f71d | 582 | enum { NOKILL, KILL }; |
c906108c | 583 | |
77382aee PA |
584 | /* To be called on a non_recoverable error for a procinfo. Prints |
585 | error messages, optionally sends a SIGKILL to the process, then | |
586 | destroys the data structure. */ | |
c906108c | 587 | |
c3f6f71d | 588 | static void |
995816ba | 589 | dead_procinfo (procinfo *pi, const char *msg, int kill_p) |
c3f6f71d JM |
590 | { |
591 | char procfile[80]; | |
c906108c | 592 | |
c3f6f71d JM |
593 | if (pi->pathname) |
594 | { | |
595 | print_sys_errmsg (pi->pathname, errno); | |
596 | } | |
597 | else | |
598 | { | |
599 | sprintf (procfile, "process %d", pi->pid); | |
600 | print_sys_errmsg (procfile, errno); | |
601 | } | |
602 | if (kill_p == KILL) | |
603 | kill (pi->pid, SIGKILL); | |
c906108c | 604 | |
c3f6f71d | 605 | destroy_procinfo (pi); |
0b62613e | 606 | error ("%s", msg); |
c3f6f71d | 607 | } |
c906108c | 608 | |
77382aee | 609 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
610 | |
611 | static sysset_t * | |
44122162 | 612 | sysset_t_alloc (procinfo *pi) |
37de36c6 | 613 | { |
44122162 | 614 | return (sysset_t *) xmalloc (sizeof (sysset_t)); |
37de36c6 KB |
615 | } |
616 | ||
c3f6f71d | 617 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 618 | |
c3f6f71d | 619 | /* =================== /proc "MODULE" =================== */ |
c906108c | 620 | |
77382aee PA |
621 | /* This "module" is the interface layer between the /proc system API |
622 | and the gdb target vector functions. This layer consists of access | |
623 | functions that encapsulate each of the basic operations that we | |
624 | need to use from the /proc API. | |
625 | ||
626 | The main motivation for this layer is to hide the fact that there | |
627 | are two very different implementations of the /proc API. Rather | |
628 | than have a bunch of #ifdefs all thru the gdb target vector | |
629 | functions, we do our best to hide them all in here. */ | |
c906108c | 630 | |
44122162 RO |
631 | static long proc_flags (procinfo *pi); |
632 | static int proc_why (procinfo *pi); | |
633 | static int proc_what (procinfo *pi); | |
634 | static int proc_set_current_signal (procinfo *pi, int signo); | |
635 | static int proc_get_current_thread (procinfo *pi); | |
d3581e61 | 636 | static int proc_iterate_over_threads |
44122162 | 637 | (procinfo *pi, |
d3581e61 JB |
638 | int (*func) (procinfo *, procinfo *, void *), |
639 | void *ptr); | |
640 | ||
641 | static void | |
995816ba | 642 | proc_warn (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
643 | { |
644 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
645 | print_sys_errmsg (errmsg, errno); | |
646 | } | |
c906108c | 647 | |
d3581e61 | 648 | static void |
995816ba | 649 | proc_error (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
650 | { |
651 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
652 | perror_with_name (errmsg); | |
653 | } | |
c906108c | 654 | |
77382aee PA |
655 | /* Updates the status struct in the procinfo. There is a 'valid' |
656 | flag, to let other functions know when this function needs to be | |
657 | called (so the status is only read when it is needed). The status | |
658 | file descriptor is also only opened when it is needed. Returns | |
659 | non-zero for success, zero for failure. */ | |
c906108c | 660 | |
d3581e61 | 661 | static int |
fba45db2 | 662 | proc_get_status (procinfo *pi) |
c3f6f71d | 663 | { |
0df8b418 | 664 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
665 | if (pi->status_fd == 0 && |
666 | open_procinfo_files (pi, FD_STATUS) == 0) | |
667 | { | |
668 | pi->status_valid = 0; | |
669 | return 0; | |
670 | } | |
c906108c | 671 | |
c3f6f71d JM |
672 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
673 | pi->status_valid = 0; /* fail */ | |
674 | else | |
675 | { | |
19958708 | 676 | /* Sigh... I have to read a different data structure, |
0df8b418 | 677 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 678 | if (pi->tid) |
19958708 RM |
679 | pi->status_valid = (read (pi->status_fd, |
680 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
681 | sizeof (lwpstatus_t)) |
682 | == sizeof (lwpstatus_t)); | |
683 | else | |
684 | { | |
19958708 | 685 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d | 686 | (char *) &pi->prstatus, |
44122162 RO |
687 | sizeof (pstatus_t)) |
688 | == sizeof (pstatus_t)); | |
c3f6f71d JM |
689 | } |
690 | } | |
c906108c | 691 | |
c3f6f71d JM |
692 | if (pi->status_valid) |
693 | { | |
19958708 | 694 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 695 | proc_why (pi), |
19958708 | 696 | proc_what (pi), |
c3f6f71d JM |
697 | proc_get_current_thread (pi)); |
698 | } | |
c906108c | 699 | |
77382aee | 700 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d | 701 | pi->gregs_valid = pi->status_valid; |
77382aee PA |
702 | /* In the read/write multiple-fd model, the status struct includes |
703 | the fp regs too, so mark them valid too. */ | |
c3f6f71d | 704 | pi->fpregs_valid = pi->status_valid; |
77382aee | 705 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 706 | } |
c906108c | 707 | |
77382aee | 708 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 709 | |
d3581e61 | 710 | static long |
fba45db2 | 711 | proc_flags (procinfo *pi) |
c3f6f71d JM |
712 | { |
713 | if (!pi->status_valid) | |
714 | if (!proc_get_status (pi)) | |
0df8b418 | 715 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 716 | |
c3f6f71d | 717 | return pi->prstatus.pr_lwp.pr_flags; |
c3f6f71d | 718 | } |
c906108c | 719 | |
77382aee | 720 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 721 | |
d3581e61 | 722 | static int |
fba45db2 | 723 | proc_why (procinfo *pi) |
c3f6f71d JM |
724 | { |
725 | if (!pi->status_valid) | |
726 | if (!proc_get_status (pi)) | |
0df8b418 | 727 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 728 | |
c3f6f71d | 729 | return pi->prstatus.pr_lwp.pr_why; |
c3f6f71d | 730 | } |
c906108c | 731 | |
77382aee | 732 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 733 | |
d3581e61 | 734 | static int |
fba45db2 | 735 | proc_what (procinfo *pi) |
c3f6f71d JM |
736 | { |
737 | if (!pi->status_valid) | |
738 | if (!proc_get_status (pi)) | |
0df8b418 | 739 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 740 | |
c3f6f71d | 741 | return pi->prstatus.pr_lwp.pr_what; |
c3f6f71d | 742 | } |
c906108c | 743 | |
77382aee PA |
744 | /* This function is only called when PI is stopped by a watchpoint. |
745 | Assuming the OS supports it, write to *ADDR the data address which | |
746 | triggered it and return 1. Return 0 if it is not possible to know | |
747 | the address. */ | |
bf701c2c PM |
748 | |
749 | static int | |
750 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
751 | { | |
752 | if (!pi->status_valid) | |
753 | if (!proc_get_status (pi)) | |
754 | return 0; | |
755 | ||
f5656ead TT |
756 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
757 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c | 758 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
bf701c2c PM |
759 | return 1; |
760 | } | |
761 | ||
77382aee PA |
762 | /* Returns the pr_nsysarg field (number of args to the current |
763 | syscall). */ | |
c3f6f71d | 764 | |
d3581e61 | 765 | static int |
fba45db2 | 766 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
767 | { |
768 | if (!pi->status_valid) | |
769 | if (!proc_get_status (pi)) | |
770 | return 0; | |
19958708 | 771 | |
c3f6f71d | 772 | return pi->prstatus.pr_lwp.pr_nsysarg; |
c3f6f71d | 773 | } |
c906108c | 774 | |
77382aee PA |
775 | /* Returns the pr_sysarg field (pointer to the arguments of current |
776 | syscall). */ | |
c906108c | 777 | |
d3581e61 | 778 | static long * |
fba45db2 | 779 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
780 | { |
781 | if (!pi->status_valid) | |
782 | if (!proc_get_status (pi)) | |
783 | return NULL; | |
19958708 | 784 | |
c3f6f71d | 785 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
c3f6f71d | 786 | } |
77382aee | 787 | |
44122162 | 788 | /* Set or reset any of the following process flags: |
77382aee PA |
789 | PR_FORK -- forked child will inherit trace flags |
790 | PR_RLC -- traced process runs when last /proc file closed. | |
791 | PR_KLC -- traced process is killed when last /proc file closed. | |
792 | PR_ASYNC -- LWP's get to run/stop independently. | |
793 | ||
44122162 | 794 | This function is done using read/write [PCSET/PCRESET/PCUNSET]. |
77382aee PA |
795 | |
796 | Arguments: | |
797 | pi -- the procinfo | |
798 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
799 | mode -- 1 for set, 0 for reset. | |
800 | ||
801 | Returns non-zero for success, zero for failure. */ | |
c906108c | 802 | |
c3f6f71d | 803 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 804 | |
c3f6f71d | 805 | static int |
fba45db2 | 806 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
807 | { |
808 | long win = 0; /* default to fail */ | |
809 | ||
77382aee PA |
810 | /* These operations affect the process as a whole, and applying them |
811 | to an individual LWP has the same meaning as applying them to the | |
812 | main process. Therefore, if we're ever called with a pointer to | |
813 | an LWP's procinfo, let's substitute the process's procinfo and | |
814 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
815 | |
816 | if (pi->pid != 0) | |
817 | pi = find_procinfo_or_die (pi->pid, 0); | |
818 | ||
44122162 | 819 | procfs_ctl_t arg[2]; |
c5aa993b | 820 | |
44122162 RO |
821 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
822 | arg[0] = PCSET; | |
0df8b418 | 823 | else /* Reset the flag. */ |
44122162 RO |
824 | arg[0] = PCUNSET; |
825 | ||
826 | arg[1] = flag; | |
827 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 828 | |
77382aee PA |
829 | /* The above operation renders the procinfo's cached pstatus |
830 | obsolete. */ | |
c3f6f71d | 831 | pi->status_valid = 0; |
c906108c | 832 | |
c3f6f71d | 833 | if (!win) |
8a3fe4f8 | 834 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
835 | flag == PR_FORK ? "PR_FORK" : |
836 | flag == PR_RLC ? "PR_RLC" : | |
c3f6f71d | 837 | flag == PR_ASYNC ? "PR_ASYNC" : |
0d06e24b | 838 | flag == PR_KLC ? "PR_KLC" : |
c3f6f71d JM |
839 | "<unknown flag>", |
840 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 841 | |
c3f6f71d JM |
842 | return win; |
843 | } | |
c906108c | 844 | |
77382aee PA |
845 | /* Set the run_on_last_close flag. Process with all threads will |
846 | become runnable when debugger closes all /proc fds. Returns | |
847 | non-zero for success, zero for failure. */ | |
c906108c | 848 | |
d3581e61 | 849 | static int |
fba45db2 | 850 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 851 | { |
c3f6f71d JM |
852 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
853 | } | |
c906108c | 854 | |
77382aee PA |
855 | /* Reset the run_on_last_close flag. The process will NOT become |
856 | runnable when debugger closes its file handles. Returns non-zero | |
857 | for success, zero for failure. */ | |
c906108c | 858 | |
d3581e61 | 859 | static int |
fba45db2 | 860 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
861 | { |
862 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
863 | } |
864 | ||
77382aee PA |
865 | /* Reset inherit_on_fork flag. If the process forks a child while we |
866 | are registered for events in the parent, then we will NOT recieve | |
867 | events from the child. Returns non-zero for success, zero for | |
868 | failure. */ | |
c906108c | 869 | |
d3581e61 | 870 | static int |
fba45db2 | 871 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
872 | { |
873 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
874 | } | |
c906108c | 875 | |
77382aee PA |
876 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
877 | (signal etc.), the remaining LWPs will continue to run. Returns | |
878 | non-zero for success, zero for failure. */ | |
c906108c | 879 | |
d3581e61 | 880 | static int |
fba45db2 | 881 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
882 | { |
883 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
884 | } | |
c906108c | 885 | |
77382aee PA |
886 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
887 | (signal etc.), then all other LWPs will stop as well. Returns | |
888 | non-zero for success, zero for failure. */ | |
c906108c | 889 | |
d3581e61 | 890 | static int |
fba45db2 | 891 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
892 | { |
893 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
894 | } | |
c906108c | 895 | |
77382aee PA |
896 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
897 | for success, zero for failure. */ | |
c906108c | 898 | |
d3581e61 | 899 | static int |
fba45db2 | 900 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
901 | { |
902 | int win; | |
c906108c | 903 | |
77382aee PA |
904 | /* We might conceivably apply this operation to an LWP, and the |
905 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 906 | |
c3f6f71d JM |
907 | if (pi->ctl_fd == 0 && |
908 | open_procinfo_files (pi, FD_CTL) == 0) | |
909 | return 0; | |
910 | else | |
911 | { | |
37de36c6 | 912 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 913 | |
c3f6f71d | 914 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d | 915 | } |
c906108c | 916 | |
c3f6f71d JM |
917 | return win; |
918 | } | |
c5aa993b | 919 | |
77382aee PA |
920 | /* Wait for the process or LWP to stop (block until it does). Returns |
921 | non-zero for success, zero for failure. */ | |
c906108c | 922 | |
d3581e61 | 923 | static int |
fba45db2 | 924 | proc_wait_for_stop (procinfo *pi) |
c906108c | 925 | { |
c3f6f71d JM |
926 | int win; |
927 | ||
77382aee PA |
928 | /* We should never have to apply this operation to any procinfo |
929 | except the one for the main process. If that ever changes for | |
930 | any reason, then take out the following clause and replace it | |
931 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 932 | |
c3f6f71d JM |
933 | if (pi->tid != 0) |
934 | pi = find_procinfo_or_die (pi->pid, 0); | |
935 | ||
44122162 | 936 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 937 | |
44122162 RO |
938 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
939 | /* We been runnin' and we stopped -- need to update status. */ | |
940 | pi->status_valid = 0; | |
c906108c | 941 | |
c3f6f71d | 942 | return win; |
c906108c SS |
943 | } |
944 | ||
77382aee PA |
945 | /* Make the process or LWP runnable. |
946 | ||
947 | Options (not all are implemented): | |
948 | - single-step | |
949 | - clear current fault | |
950 | - clear current signal | |
951 | - abort the current system call | |
952 | - stop as soon as finished with system call | |
953 | - (ioctl): set traced signal set | |
954 | - (ioctl): set held signal set | |
955 | - (ioctl): set traced fault set | |
956 | - (ioctl): set start pc (vaddr) | |
957 | ||
958 | Always clears the current fault. PI is the process or LWP to | |
959 | operate on. If STEP is true, set the process or LWP to trap after | |
960 | one instruction. If SIGNO is zero, clear the current signal if | |
961 | any; if non-zero, set the current signal to this one. Returns | |
962 | non-zero for success, zero for failure. */ | |
c3f6f71d | 963 | |
d3581e61 | 964 | static int |
fba45db2 | 965 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
966 | { |
967 | int win; | |
968 | int runflags; | |
969 | ||
77382aee PA |
970 | /* We will probably have to apply this operation to individual |
971 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 972 | |
c3f6f71d JM |
973 | if (pi->ctl_fd == 0 && |
974 | open_procinfo_files (pi, FD_CTL) == 0) | |
975 | { | |
976 | return 0; | |
977 | } | |
c906108c | 978 | |
0df8b418 | 979 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
980 | if (step) |
981 | runflags |= PRSTEP; | |
982 | if (signo == 0) | |
983 | runflags |= PRCSIG; | |
0df8b418 | 984 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 985 | proc_set_current_signal (pi, signo); |
c5aa993b | 986 | |
44122162 | 987 | procfs_ctl_t cmd[2]; |
c906108c | 988 | |
44122162 RO |
989 | cmd[0] = PCRUN; |
990 | cmd[1] = runflags; | |
991 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c906108c | 992 | |
c3f6f71d JM |
993 | return win; |
994 | } | |
c906108c | 995 | |
77382aee PA |
996 | /* Register to trace signals in the process or LWP. Returns non-zero |
997 | for success, zero for failure. */ | |
c906108c | 998 | |
d3581e61 | 999 | static int |
44122162 | 1000 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 1001 | { |
c3f6f71d JM |
1002 | int win; |
1003 | ||
77382aee PA |
1004 | /* We should never have to apply this operation to any procinfo |
1005 | except the one for the main process. If that ever changes for | |
1006 | any reason, then take out the following clause and replace it | |
1007 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1008 | |
c3f6f71d JM |
1009 | if (pi->tid != 0) |
1010 | pi = find_procinfo_or_die (pi->pid, 0); | |
1011 | ||
44122162 RO |
1012 | struct { |
1013 | procfs_ctl_t cmd; | |
1014 | /* Use char array to avoid alignment issues. */ | |
1015 | char sigset[sizeof (sigset_t)]; | |
1016 | } arg; | |
c906108c | 1017 | |
44122162 RO |
1018 | arg.cmd = PCSTRACE; |
1019 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
1020 | ||
1021 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1022 | |
0df8b418 | 1023 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1024 | pi->status_valid = 0; |
c906108c | 1025 | |
c3f6f71d | 1026 | if (!win) |
8a3fe4f8 | 1027 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1028 | return win; |
c906108c SS |
1029 | } |
1030 | ||
77382aee PA |
1031 | /* Register to trace hardware faults in the process or LWP. Returns |
1032 | non-zero for success, zero for failure. */ | |
c906108c | 1033 | |
d3581e61 | 1034 | static int |
fba45db2 | 1035 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1036 | { |
1037 | int win; | |
1038 | ||
77382aee PA |
1039 | /* We should never have to apply this operation to any procinfo |
1040 | except the one for the main process. If that ever changes for | |
1041 | any reason, then take out the following clause and replace it | |
1042 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1043 | |
c3f6f71d JM |
1044 | if (pi->tid != 0) |
1045 | pi = find_procinfo_or_die (pi->pid, 0); | |
1046 | ||
44122162 RO |
1047 | struct { |
1048 | procfs_ctl_t cmd; | |
1049 | /* Use char array to avoid alignment issues. */ | |
1050 | char fltset[sizeof (fltset_t)]; | |
1051 | } arg; | |
1052 | ||
1053 | arg.cmd = PCSFAULT; | |
1054 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1055 | |
44122162 | 1056 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
c906108c | 1057 | |
0df8b418 | 1058 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1059 | pi->status_valid = 0; |
c906108c | 1060 | |
c3f6f71d JM |
1061 | return win; |
1062 | } | |
c5aa993b | 1063 | |
77382aee PA |
1064 | /* Register to trace entry to system calls in the process or LWP. |
1065 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1066 | |
d3581e61 | 1067 | static int |
fba45db2 | 1068 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1069 | { |
c3f6f71d JM |
1070 | int win; |
1071 | ||
77382aee PA |
1072 | /* We should never have to apply this operation to any procinfo |
1073 | except the one for the main process. If that ever changes for | |
1074 | any reason, then take out the following clause and replace it | |
1075 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1076 | |
c3f6f71d JM |
1077 | if (pi->tid != 0) |
1078 | pi = find_procinfo_or_die (pi->pid, 0); | |
1079 | ||
44122162 RO |
1080 | struct gdb_proc_ctl_pcsentry { |
1081 | procfs_ctl_t cmd; | |
1082 | /* Use char array to avoid alignment issues. */ | |
1083 | char sysset[sizeof (sysset_t)]; | |
1084 | } *argp; | |
1085 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry); | |
c3f6f71d | 1086 | |
44122162 | 1087 | argp = (struct gdb_proc_ctl_pcsentry *) xmalloc (argp_size); |
c3f6f71d | 1088 | |
44122162 RO |
1089 | argp->cmd = PCSENTRY; |
1090 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
1091 | ||
1092 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1093 | xfree (argp); | |
37de36c6 | 1094 | |
77382aee PA |
1095 | /* The above operation renders the procinfo's cached pstatus |
1096 | obsolete. */ | |
c3f6f71d | 1097 | pi->status_valid = 0; |
19958708 | 1098 | |
c3f6f71d | 1099 | return win; |
c906108c SS |
1100 | } |
1101 | ||
77382aee PA |
1102 | /* Register to trace exit from system calls in the process or LWP. |
1103 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1104 | |
d3581e61 | 1105 | static int |
fba45db2 | 1106 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1107 | { |
1108 | int win; | |
1109 | ||
77382aee PA |
1110 | /* We should never have to apply this operation to any procinfo |
1111 | except the one for the main process. If that ever changes for | |
1112 | any reason, then take out the following clause and replace it | |
1113 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1114 | |
c3f6f71d JM |
1115 | if (pi->tid != 0) |
1116 | pi = find_procinfo_or_die (pi->pid, 0); | |
1117 | ||
44122162 RO |
1118 | struct gdb_proc_ctl_pcsexit { |
1119 | procfs_ctl_t cmd; | |
1120 | /* Use char array to avoid alignment issues. */ | |
1121 | char sysset[sizeof (sysset_t)]; | |
1122 | } *argp; | |
1123 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit); | |
1124 | ||
1125 | argp = (struct gdb_proc_ctl_pcsexit *) xmalloc (argp_size); | |
c906108c | 1126 | |
44122162 RO |
1127 | argp->cmd = PCSEXIT; |
1128 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1129 | |
44122162 RO |
1130 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
1131 | xfree (argp); | |
37de36c6 | 1132 | |
77382aee PA |
1133 | /* The above operation renders the procinfo's cached pstatus |
1134 | obsolete. */ | |
c3f6f71d | 1135 | pi->status_valid = 0; |
c906108c | 1136 | |
c3f6f71d JM |
1137 | return win; |
1138 | } | |
c906108c | 1139 | |
77382aee PA |
1140 | /* Specify the set of blocked / held signals in the process or LWP. |
1141 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1142 | |
d3581e61 | 1143 | static int |
44122162 | 1144 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1145 | { |
c3f6f71d JM |
1146 | int win; |
1147 | ||
77382aee PA |
1148 | /* We should never have to apply this operation to any procinfo |
1149 | except the one for the main process. If that ever changes for | |
1150 | any reason, then take out the following clause and replace it | |
1151 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1152 | |
c3f6f71d JM |
1153 | if (pi->tid != 0) |
1154 | pi = find_procinfo_or_die (pi->pid, 0); | |
1155 | ||
44122162 RO |
1156 | struct { |
1157 | procfs_ctl_t cmd; | |
1158 | /* Use char array to avoid alignment issues. */ | |
1159 | char hold[sizeof (sigset_t)]; | |
1160 | } arg; | |
1161 | ||
1162 | arg.cmd = PCSHOLD; | |
1163 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1164 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1165 | ||
77382aee PA |
1166 | /* The above operation renders the procinfo's cached pstatus |
1167 | obsolete. */ | |
c3f6f71d JM |
1168 | pi->status_valid = 0; |
1169 | ||
1170 | return win; | |
c906108c SS |
1171 | } |
1172 | ||
77382aee PA |
1173 | /* Returns the set of signals that are held / blocked. Will also copy |
1174 | the sigset if SAVE is non-zero. */ | |
c906108c | 1175 | |
44122162 RO |
1176 | static sigset_t * |
1177 | proc_get_held_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1178 | { |
44122162 | 1179 | sigset_t *ret = NULL; |
c3f6f71d | 1180 | |
77382aee PA |
1181 | /* We should never have to apply this operation to any procinfo |
1182 | except the one for the main process. If that ever changes for | |
1183 | any reason, then take out the following clause and replace it | |
1184 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1185 | |
c3f6f71d JM |
1186 | if (pi->tid != 0) |
1187 | pi = find_procinfo_or_die (pi->pid, 0); | |
1188 | ||
c3f6f71d JM |
1189 | if (!pi->status_valid) |
1190 | if (!proc_get_status (pi)) | |
1191 | return NULL; | |
1192 | ||
c3f6f71d | 1193 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d | 1194 | if (save && ret) |
44122162 | 1195 | memcpy (save, ret, sizeof (sigset_t)); |
c3f6f71d JM |
1196 | |
1197 | return ret; | |
c906108c SS |
1198 | } |
1199 | ||
77382aee PA |
1200 | /* Returns the set of signals that are traced / debugged. Will also |
1201 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1202 | |
44122162 RO |
1203 | static sigset_t * |
1204 | proc_get_traced_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1205 | { |
44122162 | 1206 | sigset_t *ret = NULL; |
c3f6f71d | 1207 | |
77382aee PA |
1208 | /* We should never have to apply this operation to any procinfo |
1209 | except the one for the main process. If that ever changes for | |
1210 | any reason, then take out the following clause and replace it | |
1211 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1212 | |
c3f6f71d JM |
1213 | if (pi->tid != 0) |
1214 | pi = find_procinfo_or_die (pi->pid, 0); | |
1215 | ||
c3f6f71d JM |
1216 | if (!pi->status_valid) |
1217 | if (!proc_get_status (pi)) | |
1218 | return NULL; | |
1219 | ||
1220 | ret = &pi->prstatus.pr_sigtrace; | |
c3f6f71d | 1221 | if (save && ret) |
44122162 | 1222 | memcpy (save, ret, sizeof (sigset_t)); |
c906108c | 1223 | |
c3f6f71d JM |
1224 | return ret; |
1225 | } | |
c906108c | 1226 | |
77382aee PA |
1227 | /* Returns the set of hardware faults that are traced /debugged. Will |
1228 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1229 | |
d3581e61 | 1230 | static fltset_t * |
fba45db2 | 1231 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1232 | { |
1233 | fltset_t *ret = NULL; | |
1234 | ||
77382aee PA |
1235 | /* We should never have to apply this operation to any procinfo |
1236 | except the one for the main process. If that ever changes for | |
1237 | any reason, then take out the following clause and replace it | |
1238 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1239 | |
c3f6f71d JM |
1240 | if (pi->tid != 0) |
1241 | pi = find_procinfo_or_die (pi->pid, 0); | |
1242 | ||
c3f6f71d JM |
1243 | if (!pi->status_valid) |
1244 | if (!proc_get_status (pi)) | |
1245 | return NULL; | |
1246 | ||
1247 | ret = &pi->prstatus.pr_flttrace; | |
c3f6f71d JM |
1248 | if (save && ret) |
1249 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1250 | |
c3f6f71d JM |
1251 | return ret; |
1252 | } | |
c906108c | 1253 | |
77382aee PA |
1254 | /* Returns the set of syscalls that are traced /debugged on entry. |
1255 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1256 | |
d3581e61 | 1257 | static sysset_t * |
fba45db2 | 1258 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1259 | { |
1260 | sysset_t *ret = NULL; | |
1261 | ||
77382aee PA |
1262 | /* We should never have to apply this operation to any procinfo |
1263 | except the one for the main process. If that ever changes for | |
1264 | any reason, then take out the following clause and replace it | |
1265 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1266 | |
c3f6f71d JM |
1267 | if (pi->tid != 0) |
1268 | pi = find_procinfo_or_die (pi->pid, 0); | |
1269 | ||
c3f6f71d JM |
1270 | if (!pi->status_valid) |
1271 | if (!proc_get_status (pi)) | |
1272 | return NULL; | |
1273 | ||
1274 | ret = &pi->prstatus.pr_sysentry; | |
c3f6f71d | 1275 | if (save && ret) |
44122162 | 1276 | memcpy (save, ret, sizeof (sysset_t)); |
c906108c | 1277 | |
c3f6f71d JM |
1278 | return ret; |
1279 | } | |
c5aa993b | 1280 | |
77382aee PA |
1281 | /* Returns the set of syscalls that are traced /debugged on exit. |
1282 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1283 | |
d3581e61 | 1284 | static sysset_t * |
fba45db2 | 1285 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1286 | { |
44122162 | 1287 | sysset_t *ret = NULL; |
c3f6f71d | 1288 | |
77382aee PA |
1289 | /* We should never have to apply this operation to any procinfo |
1290 | except the one for the main process. If that ever changes for | |
1291 | any reason, then take out the following clause and replace it | |
1292 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1293 | |
c3f6f71d JM |
1294 | if (pi->tid != 0) |
1295 | pi = find_procinfo_or_die (pi->pid, 0); | |
1296 | ||
c3f6f71d JM |
1297 | if (!pi->status_valid) |
1298 | if (!proc_get_status (pi)) | |
1299 | return NULL; | |
1300 | ||
1301 | ret = &pi->prstatus.pr_sysexit; | |
c3f6f71d | 1302 | if (save && ret) |
44122162 | 1303 | memcpy (save, ret, sizeof (sysset_t)); |
c3f6f71d JM |
1304 | |
1305 | return ret; | |
1306 | } | |
c906108c | 1307 | |
77382aee PA |
1308 | /* The current fault (if any) is cleared; the associated signal will |
1309 | not be sent to the process or LWP when it resumes. Returns | |
1310 | non-zero for success, zero for failure. */ | |
c906108c | 1311 | |
d3581e61 | 1312 | static int |
fba45db2 | 1313 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
1314 | { |
1315 | int win; | |
1316 | ||
77382aee PA |
1317 | /* We should never have to apply this operation to any procinfo |
1318 | except the one for the main process. If that ever changes for | |
1319 | any reason, then take out the following clause and replace it | |
1320 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1321 | |
c3f6f71d JM |
1322 | if (pi->tid != 0) |
1323 | pi = find_procinfo_or_die (pi->pid, 0); | |
1324 | ||
44122162 | 1325 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 1326 | |
44122162 | 1327 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d JM |
1328 | |
1329 | return win; | |
c906108c SS |
1330 | } |
1331 | ||
77382aee PA |
1332 | /* Set the "current signal" that will be delivered next to the |
1333 | process. NOTE: semantics are different from those of KILL. This | |
1334 | signal will be delivered to the process or LWP immediately when it | |
1335 | is resumed (even if the signal is held/blocked); it will NOT | |
1336 | immediately cause another event of interest, and will NOT first | |
1337 | trap back to the debugger. Returns non-zero for success, zero for | |
1338 | failure. */ | |
c3f6f71d | 1339 | |
d3581e61 | 1340 | static int |
fba45db2 | 1341 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1342 | { |
1343 | int win; | |
1344 | struct { | |
37de36c6 | 1345 | procfs_ctl_t cmd; |
c3f6f71d | 1346 | /* Use char array to avoid alignment issues. */ |
44122162 | 1347 | char sinfo[sizeof (siginfo_t)]; |
c3f6f71d | 1348 | } arg; |
44122162 | 1349 | siginfo_t mysinfo; |
c162e8c9 JM |
1350 | ptid_t wait_ptid; |
1351 | struct target_waitstatus wait_status; | |
c3f6f71d | 1352 | |
77382aee PA |
1353 | /* We should never have to apply this operation to any procinfo |
1354 | except the one for the main process. If that ever changes for | |
1355 | any reason, then take out the following clause and replace it | |
1356 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1357 | |
c3f6f71d JM |
1358 | if (pi->tid != 0) |
1359 | pi = find_procinfo_or_die (pi->pid, 0); | |
1360 | ||
c3f6f71d | 1361 | /* The pointer is just a type alias. */ |
c162e8c9 JM |
1362 | get_last_target_status (&wait_ptid, &wait_status); |
1363 | if (ptid_equal (wait_ptid, inferior_ptid) | |
1364 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 1365 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 | 1366 | && proc_get_status (pi) |
c162e8c9 | 1367 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
c162e8c9 JM |
1368 | ) |
1369 | /* Use the siginfo associated with the signal being | |
1370 | redelivered. */ | |
44122162 | 1371 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (siginfo_t)); |
c162e8c9 JM |
1372 | else |
1373 | { | |
73930d4d KH |
1374 | mysinfo.si_signo = signo; |
1375 | mysinfo.si_code = 0; | |
1376 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1377 | mysinfo.si_uid = getuid (); /* ?why? */ | |
44122162 | 1378 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); |
c162e8c9 | 1379 | } |
c3f6f71d | 1380 | |
c3f6f71d JM |
1381 | arg.cmd = PCSSIG; |
1382 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1383 | |
c3f6f71d JM |
1384 | return win; |
1385 | } | |
c906108c | 1386 | |
77382aee PA |
1387 | /* The current signal (if any) is cleared, and is not sent to the |
1388 | process or LWP when it resumes. Returns non-zero for success, zero | |
1389 | for failure. */ | |
c906108c | 1390 | |
d3581e61 | 1391 | static int |
fba45db2 | 1392 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
1393 | { |
1394 | int win; | |
1395 | ||
77382aee PA |
1396 | /* We should never have to apply this operation to any procinfo |
1397 | except the one for the main process. If that ever changes for | |
1398 | any reason, then take out the following clause and replace it | |
1399 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1400 | |
c3f6f71d JM |
1401 | if (pi->tid != 0) |
1402 | pi = find_procinfo_or_die (pi->pid, 0); | |
1403 | ||
44122162 RO |
1404 | struct { |
1405 | procfs_ctl_t cmd; | |
1406 | /* Use char array to avoid alignment issues. */ | |
1407 | char sinfo[sizeof (siginfo_t)]; | |
1408 | } arg; | |
1409 | siginfo_t mysinfo; | |
1410 | ||
1411 | arg.cmd = PCSSIG; | |
1412 | /* The pointer is just a type alias. */ | |
1413 | mysinfo.si_signo = 0; | |
1414 | mysinfo.si_code = 0; | |
1415 | mysinfo.si_errno = 0; | |
1416 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1417 | mysinfo.si_uid = getuid (); /* ?why? */ | |
1418 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); | |
1419 | ||
1420 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1421 | |
c3f6f71d JM |
1422 | return win; |
1423 | } | |
c906108c | 1424 | |
772cf8be MK |
1425 | /* Return the general-purpose registers for the process or LWP |
1426 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1427 | |
d3581e61 | 1428 | static gdb_gregset_t * |
fba45db2 | 1429 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
1430 | { |
1431 | if (!pi->status_valid || !pi->gregs_valid) | |
1432 | if (!proc_get_status (pi)) | |
1433 | return NULL; | |
1434 | ||
c3f6f71d | 1435 | return &pi->prstatus.pr_lwp.pr_reg; |
c3f6f71d | 1436 | } |
c5aa993b | 1437 | |
772cf8be MK |
1438 | /* Return the general-purpose registers for the process or LWP |
1439 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1440 | |
d3581e61 | 1441 | static gdb_fpregset_t * |
fba45db2 | 1442 | proc_get_fpregs (procinfo *pi) |
c906108c | 1443 | { |
c3f6f71d JM |
1444 | if (!pi->status_valid || !pi->fpregs_valid) |
1445 | if (!proc_get_status (pi)) | |
1446 | return NULL; | |
1447 | ||
c3f6f71d | 1448 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c906108c SS |
1449 | } |
1450 | ||
772cf8be MK |
1451 | /* Write the general-purpose registers back to the process or LWP |
1452 | corresponding to PI. Return non-zero for success, zero for | |
1453 | failure. */ | |
c3f6f71d | 1454 | |
d3581e61 | 1455 | static int |
fba45db2 | 1456 | proc_set_gregs (procinfo *pi) |
c906108c | 1457 | { |
c3f6f71d JM |
1458 | gdb_gregset_t *gregs; |
1459 | int win; | |
c5aa993b | 1460 | |
772cf8be MK |
1461 | gregs = proc_get_gregs (pi); |
1462 | if (gregs == NULL) | |
1463 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 1464 | |
772cf8be | 1465 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1466 | { |
c3f6f71d | 1467 | return 0; |
c906108c | 1468 | } |
c3f6f71d | 1469 | else |
c906108c | 1470 | { |
c3f6f71d | 1471 | struct { |
37de36c6 | 1472 | procfs_ctl_t cmd; |
c3f6f71d JM |
1473 | /* Use char array to avoid alignment issues. */ |
1474 | char gregs[sizeof (gdb_gregset_t)]; | |
1475 | } arg; | |
1476 | ||
772cf8be | 1477 | arg.cmd = PCSREG; |
c3f6f71d JM |
1478 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
1479 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1480 | } |
c3f6f71d | 1481 | |
772cf8be | 1482 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1483 | pi->gregs_valid = 0; |
1484 | return win; | |
c906108c SS |
1485 | } |
1486 | ||
772cf8be MK |
1487 | /* Write the floating-pointer registers back to the process or LWP |
1488 | corresponding to PI. Return non-zero for success, zero for | |
1489 | failure. */ | |
c3f6f71d | 1490 | |
d3581e61 | 1491 | static int |
fba45db2 | 1492 | proc_set_fpregs (procinfo *pi) |
c906108c | 1493 | { |
c3f6f71d JM |
1494 | gdb_fpregset_t *fpregs; |
1495 | int win; | |
1496 | ||
772cf8be MK |
1497 | fpregs = proc_get_fpregs (pi); |
1498 | if (fpregs == NULL) | |
1499 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 1500 | |
772cf8be | 1501 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1502 | { |
c3f6f71d | 1503 | return 0; |
c906108c | 1504 | } |
c3f6f71d | 1505 | else |
c906108c | 1506 | { |
c3f6f71d | 1507 | struct { |
37de36c6 | 1508 | procfs_ctl_t cmd; |
c3f6f71d JM |
1509 | /* Use char array to avoid alignment issues. */ |
1510 | char fpregs[sizeof (gdb_fpregset_t)]; | |
1511 | } arg; | |
1512 | ||
772cf8be | 1513 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
1514 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
1515 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1516 | } |
c3f6f71d | 1517 | |
772cf8be | 1518 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1519 | pi->fpregs_valid = 0; |
1520 | return win; | |
c906108c SS |
1521 | } |
1522 | ||
77382aee PA |
1523 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
1524 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1525 | |
d3581e61 | 1526 | static int |
fba45db2 | 1527 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
1528 | { |
1529 | int win; | |
c906108c | 1530 | |
77382aee PA |
1531 | /* We might conceivably apply this operation to an LWP, and the |
1532 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1533 | |
c3f6f71d JM |
1534 | if (pi->ctl_fd == 0 && |
1535 | open_procinfo_files (pi, FD_CTL) == 0) | |
1536 | { | |
1537 | return 0; | |
1538 | } | |
1539 | else | |
1540 | { | |
37de36c6 | 1541 | procfs_ctl_t cmd[2]; |
c906108c | 1542 | |
c3f6f71d JM |
1543 | cmd[0] = PCKILL; |
1544 | cmd[1] = signo; | |
1545 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c3f6f71d | 1546 | } |
c906108c | 1547 | |
c3f6f71d JM |
1548 | return win; |
1549 | } | |
c906108c | 1550 | |
77382aee PA |
1551 | /* Find the pid of the process that started this one. Returns the |
1552 | parent process pid, or zero. */ | |
c906108c | 1553 | |
d3581e61 | 1554 | static int |
fba45db2 | 1555 | proc_parent_pid (procinfo *pi) |
c906108c | 1556 | { |
77382aee PA |
1557 | /* We should never have to apply this operation to any procinfo |
1558 | except the one for the main process. If that ever changes for | |
1559 | any reason, then take out the following clause and replace it | |
1560 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1561 | |
c3f6f71d JM |
1562 | if (pi->tid != 0) |
1563 | pi = find_procinfo_or_die (pi->pid, 0); | |
1564 | ||
1565 | if (!pi->status_valid) | |
1566 | if (!proc_get_status (pi)) | |
1567 | return 0; | |
c5aa993b | 1568 | |
c3f6f71d JM |
1569 | return pi->prstatus.pr_ppid; |
1570 | } | |
1571 | ||
9a043c1d AC |
1572 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
1573 | (a.k.a void pointer)! */ | |
1574 | ||
1575 | static void * | |
1576 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
1577 | { | |
f5656ead | 1578 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
1579 | void *ptr; |
1580 | ||
4e906f53 | 1581 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 1582 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 1583 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
1584 | return ptr; |
1585 | } | |
1586 | ||
a0911fd0 | 1587 | static int |
fba45db2 | 1588 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 1589 | { |
c3f6f71d | 1590 | struct { |
37de36c6 | 1591 | procfs_ctl_t cmd; |
c3f6f71d JM |
1592 | char watch[sizeof (prwatch_t)]; |
1593 | } arg; | |
73930d4d | 1594 | prwatch_t pwatch; |
c3f6f71d | 1595 | |
9a043c1d AC |
1596 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
1597 | convert a target address into something that can be stored in a | |
1598 | native data structure. */ | |
73930d4d | 1599 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
73930d4d KH |
1600 | pwatch.pr_size = len; |
1601 | pwatch.pr_wflags = wflags; | |
c3f6f71d | 1602 | arg.cmd = PCWATCH; |
73930d4d | 1603 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d | 1604 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
c906108c SS |
1605 | } |
1606 | ||
965b60ee | 1607 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 1608 | |
c3f6f71d | 1609 | #include <sys/sysi86.h> |
c906108c | 1610 | |
77382aee PA |
1611 | /* The KEY is actually the value of the lower 16 bits of the GS |
1612 | register for the LWP that we're interested in. Returns the | |
1613 | matching ssh struct (LDT entry). */ | |
c906108c | 1614 | |
337c776f | 1615 | static struct ssd * |
fba45db2 | 1616 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 1617 | { |
c3f6f71d | 1618 | static struct ssd *ldt_entry = NULL; |
c3f6f71d | 1619 | char pathname[MAX_PROC_NAME_SIZE]; |
c3f6f71d JM |
1620 | |
1621 | /* Allocate space for one LDT entry. | |
1622 | This alloc must persist, because we return a pointer to it. */ | |
1623 | if (ldt_entry == NULL) | |
8d749320 | 1624 | ldt_entry = XNEW (struct ssd); |
c3f6f71d JM |
1625 | |
1626 | /* Open the file descriptor for the LDT table. */ | |
1627 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
5dc1a704 TT |
1628 | scoped_fd fd (open_with_retry (pathname, O_RDONLY)); |
1629 | if (fd.get () < 0) | |
c906108c | 1630 | { |
c3f6f71d JM |
1631 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
1632 | return NULL; | |
c906108c SS |
1633 | } |
1634 | ||
c3f6f71d | 1635 | /* Now 'read' thru the table, find a match and return it. */ |
5dc1a704 TT |
1636 | while (read (fd.get (), ldt_entry, sizeof (struct ssd)) |
1637 | == sizeof (struct ssd)) | |
c906108c | 1638 | { |
c3f6f71d JM |
1639 | if (ldt_entry->sel == 0 && |
1640 | ldt_entry->bo == 0 && | |
1641 | ldt_entry->acc1 == 0 && | |
1642 | ldt_entry->acc2 == 0) | |
1643 | break; /* end of table */ | |
0df8b418 | 1644 | /* If key matches, return this entry. */ |
c3f6f71d | 1645 | if (ldt_entry->sel == key) |
70b33f19 | 1646 | return ldt_entry; |
c906108c | 1647 | } |
0df8b418 | 1648 | /* Loop ended, match not found. */ |
c3f6f71d | 1649 | return NULL; |
c3f6f71d | 1650 | } |
c906108c | 1651 | |
77382aee | 1652 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
1653 | |
1654 | struct ssd * | |
1655 | procfs_find_LDT_entry (ptid_t ptid) | |
1656 | { | |
1657 | gdb_gregset_t *gregs; | |
1658 | int key; | |
1659 | procinfo *pi; | |
1660 | ||
0df8b418 | 1661 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 1662 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 1663 | { |
0b62613e | 1664 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 1665 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1666 | return NULL; |
1667 | } | |
0df8b418 | 1668 | /* get its general registers. */ |
965b60ee JB |
1669 | if ((gregs = proc_get_gregs (pi)) == NULL) |
1670 | { | |
0b62613e | 1671 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 1672 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1673 | return NULL; |
1674 | } | |
0df8b418 | 1675 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
1676 | key = (*gregs)[GS] & 0xffff; |
1677 | ||
0df8b418 | 1678 | /* Find the matching entry and return it. */ |
965b60ee JB |
1679 | return proc_get_LDT_entry (pi, key); |
1680 | } | |
1681 | ||
1682 | #endif | |
c906108c | 1683 | |
c3f6f71d | 1684 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 1685 | |
c3f6f71d | 1686 | /* =================== Thread "MODULE" =================== */ |
c906108c | 1687 | |
44122162 RO |
1688 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
1689 | since there is a different way to do threads on every OS. */ | |
c906108c | 1690 | |
44122162 | 1691 | /* Returns the number of threads for the process. */ |
c906108c | 1692 | |
d3581e61 | 1693 | static int |
fba45db2 | 1694 | proc_get_nthreads (procinfo *pi) |
c906108c | 1695 | { |
c3f6f71d JM |
1696 | if (!pi->status_valid) |
1697 | if (!proc_get_status (pi)) | |
1698 | return 0; | |
c5aa993b | 1699 | |
44122162 RO |
1700 | /* Only works for the process procinfo, because the LWP procinfos do not |
1701 | get prstatus filled in. */ | |
0df8b418 | 1702 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 1703 | pi = find_procinfo_or_die (pi->pid, 0); |
c3f6f71d | 1704 | return pi->prstatus.pr_nlwp; |
c906108c SS |
1705 | } |
1706 | ||
77382aee PA |
1707 | /* LWP version. |
1708 | ||
1709 | Return the ID of the thread that had an event of interest. | |
1710 | (ie. the one that hit a breakpoint or other traced event). All | |
1711 | other things being equal, this should be the ID of a thread that is | |
1712 | currently executing. */ | |
c3f6f71d | 1713 | |
d3581e61 | 1714 | static int |
fba45db2 | 1715 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 1716 | { |
77382aee PA |
1717 | /* Note: this should be applied to the root procinfo for the |
1718 | process, not to the procinfo for an LWP. If applied to the | |
1719 | procinfo for an LWP, it will simply return that LWP's ID. In | |
1720 | that case, find the parent process procinfo. */ | |
19958708 | 1721 | |
c3f6f71d JM |
1722 | if (pi->tid != 0) |
1723 | pi = find_procinfo_or_die (pi->pid, 0); | |
1724 | ||
1725 | if (!pi->status_valid) | |
1726 | if (!proc_get_status (pi)) | |
1727 | return 0; | |
1728 | ||
c3f6f71d | 1729 | return pi->prstatus.pr_lwp.pr_lwpid; |
c3f6f71d JM |
1730 | } |
1731 | ||
77382aee PA |
1732 | /* Discover the IDs of all the threads within the process, and create |
1733 | a procinfo for each of them (chained to the parent). This | |
1734 | unfortunately requires a different method on every OS. Returns | |
1735 | non-zero for success, zero for failure. */ | |
c906108c | 1736 | |
a0911fd0 | 1737 | static int |
fba45db2 | 1738 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
1739 | { |
1740 | if (thread && parent) /* sanity */ | |
c906108c | 1741 | { |
c3f6f71d JM |
1742 | thread->status_valid = 0; |
1743 | if (!proc_get_status (thread)) | |
1744 | destroy_one_procinfo (&parent->thread_list, thread); | |
1745 | } | |
1746 | return 0; /* keep iterating */ | |
1747 | } | |
c5aa993b | 1748 | |
004527cb AC |
1749 | static void |
1750 | do_closedir_cleanup (void *dir) | |
1751 | { | |
b196bc4c | 1752 | closedir ((DIR *) dir); |
004527cb AC |
1753 | } |
1754 | ||
d3581e61 | 1755 | static int |
fba45db2 | 1756 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
1757 | { |
1758 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
1759 | struct dirent *direntry; | |
1760 | struct cleanup *old_chain = NULL; | |
1761 | procinfo *thread; | |
1762 | DIR *dirp; | |
1763 | int lwpid; | |
1764 | ||
77382aee PA |
1765 | /* We should never have to apply this operation to any procinfo |
1766 | except the one for the main process. If that ever changes for | |
1767 | any reason, then take out the following clause and replace it | |
1768 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1769 | |
c3f6f71d JM |
1770 | if (pi->tid != 0) |
1771 | pi = find_procinfo_or_die (pi->pid, 0); | |
1772 | ||
1773 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
1774 | ||
05b4bd79 PA |
1775 | /* Note: this brute-force method was originally devised for Unixware |
1776 | (support removed since), and will also work on Solaris 2.6 and | |
1777 | 2.7. The original comment mentioned the existence of a much | |
1778 | simpler and more elegant way to do this on Solaris, but didn't | |
1779 | point out what that was. */ | |
c3f6f71d JM |
1780 | |
1781 | strcpy (pathname, pi->pathname); | |
1782 | strcat (pathname, "/lwp"); | |
1783 | if ((dirp = opendir (pathname)) == NULL) | |
1784 | proc_error (pi, "update_threads, opendir", __LINE__); | |
1785 | ||
004527cb | 1786 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
1787 | while ((direntry = readdir (dirp)) != NULL) |
1788 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
1789 | { | |
1790 | lwpid = atoi (&direntry->d_name[0]); | |
1791 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
1792 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
1793 | } | |
1794 | pi->threads_valid = 1; | |
1795 | do_cleanups (old_chain); | |
1796 | return 1; | |
1797 | } | |
c906108c | 1798 | |
77382aee PA |
1799 | /* Given a pointer to a function, call that function once for each lwp |
1800 | in the procinfo list, until the function returns non-zero, in which | |
1801 | event return the value returned by the function. | |
1802 | ||
1803 | Note: this function does NOT call update_threads. If you want to | |
1804 | discover new threads first, you must call that function explicitly. | |
1805 | This function just makes a quick pass over the currently-known | |
1806 | procinfos. | |
1807 | ||
1808 | PI is the parent process procinfo. FUNC is the per-thread | |
1809 | function. PTR is an opaque parameter for function. Returns the | |
1810 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 1811 | |
d3581e61 | 1812 | static int |
d0849a9a KB |
1813 | proc_iterate_over_threads (procinfo *pi, |
1814 | int (*func) (procinfo *, procinfo *, void *), | |
1815 | void *ptr) | |
c906108c | 1816 | { |
c3f6f71d JM |
1817 | procinfo *thread, *next; |
1818 | int retval = 0; | |
c906108c | 1819 | |
77382aee PA |
1820 | /* We should never have to apply this operation to any procinfo |
1821 | except the one for the main process. If that ever changes for | |
1822 | any reason, then take out the following clause and replace it | |
1823 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1824 | |
c3f6f71d JM |
1825 | if (pi->tid != 0) |
1826 | pi = find_procinfo_or_die (pi->pid, 0); | |
1827 | ||
1828 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 1829 | { |
0df8b418 | 1830 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
1831 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
1832 | break; | |
c906108c | 1833 | } |
c3f6f71d JM |
1834 | |
1835 | return retval; | |
c906108c SS |
1836 | } |
1837 | ||
c3f6f71d JM |
1838 | /* =================== END, Thread "MODULE" =================== */ |
1839 | ||
1840 | /* =================== END, /proc "MODULE" =================== */ | |
1841 | ||
1842 | /* =================== GDB "MODULE" =================== */ | |
1843 | ||
77382aee PA |
1844 | /* Here are all of the gdb target vector functions and their |
1845 | friends. */ | |
c3f6f71d | 1846 | |
39f77062 | 1847 | static ptid_t do_attach (ptid_t ptid); |
6bd6f3b6 | 1848 | static void do_detach (); |
9185ddce | 1849 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 1850 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 1851 | |
77382aee PA |
1852 | /* Sets up the inferior to be debugged. Registers to trace signals, |
1853 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
1854 | may want to customize that. Returns zero for success (note! | |
1855 | unlike most functions in this module); on failure, returns the LINE | |
1856 | NUMBER where it failed! */ | |
c3f6f71d JM |
1857 | |
1858 | static int | |
fba45db2 | 1859 | procfs_debug_inferior (procinfo *pi) |
c906108c | 1860 | { |
c3f6f71d | 1861 | fltset_t traced_faults; |
44122162 | 1862 | sigset_t traced_signals; |
37de36c6 KB |
1863 | sysset_t *traced_syscall_entries; |
1864 | sysset_t *traced_syscall_exits; | |
1865 | int status; | |
c906108c | 1866 | |
0df8b418 MS |
1867 | /* Register to trace hardware faults in the child. */ |
1868 | prfillset (&traced_faults); /* trace all faults... */ | |
44122162 | 1869 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
1870 | if (!proc_set_traced_faults (pi, &traced_faults)) |
1871 | return __LINE__; | |
c906108c | 1872 | |
2455069d UW |
1873 | /* Initially, register to trace all signals in the child. */ |
1874 | prfillset (&traced_signals); | |
1875 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
1876 | return __LINE__; |
1877 | ||
37de36c6 | 1878 | |
c3f6f71d | 1879 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 | 1880 | traced_syscall_entries = sysset_t_alloc (pi); |
44122162 RO |
1881 | premptyset (traced_syscall_entries); |
1882 | praddset (traced_syscall_entries, SYS_exit); | |
1883 | praddset (traced_syscall_entries, SYS_lwp_exit); | |
c906108c | 1884 | |
37de36c6 KB |
1885 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
1886 | xfree (traced_syscall_entries); | |
1887 | if (!status) | |
c3f6f71d JM |
1888 | return __LINE__; |
1889 | ||
44122162 | 1890 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
1891 | /* GW: Rationale... |
1892 | Not all systems with /proc have all the exec* syscalls with the same | |
1893 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 1894 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 1895 | |
37de36c6 | 1896 | traced_syscall_exits = sysset_t_alloc (pi); |
44122162 | 1897 | premptyset (traced_syscall_exits); |
c3f6f71d | 1898 | #ifdef SYS_exec |
44122162 | 1899 | praddset (traced_syscall_exits, SYS_exec); |
37de36c6 | 1900 | #endif |
44122162 RO |
1901 | praddset (traced_syscall_exits, SYS_execve); |
1902 | praddset (traced_syscall_exits, SYS_lwp_create); | |
1903 | praddset (traced_syscall_exits, SYS_lwp_exit); | |
c906108c | 1904 | |
37de36c6 KB |
1905 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
1906 | xfree (traced_syscall_exits); | |
1907 | if (!status) | |
c3f6f71d JM |
1908 | return __LINE__; |
1909 | ||
c3f6f71d | 1910 | return 0; |
c906108c SS |
1911 | } |
1912 | ||
19958708 | 1913 | static void |
c0939df1 | 1914 | procfs_attach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 1915 | { |
c3f6f71d JM |
1916 | char *exec_file; |
1917 | int pid; | |
1918 | ||
74164c56 | 1919 | pid = parse_pid_to_attach (args); |
c3f6f71d | 1920 | |
c3f6f71d | 1921 | if (pid == getpid ()) |
8a3fe4f8 | 1922 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 1923 | |
c3f6f71d | 1924 | if (from_tty) |
c906108c | 1925 | { |
c3f6f71d JM |
1926 | exec_file = get_exec_file (0); |
1927 | ||
1928 | if (exec_file) | |
a3f17187 | 1929 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 1930 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 1931 | else |
a3f17187 | 1932 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 1933 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
1934 | |
1935 | fflush (stdout); | |
c906108c | 1936 | } |
39f77062 | 1937 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
6a3cb8e8 PA |
1938 | if (!target_is_pushed (ops)) |
1939 | push_target (ops); | |
c3f6f71d JM |
1940 | } |
1941 | ||
19958708 | 1942 | static void |
6e1e1966 | 1943 | procfs_detach (struct target_ops *ops, inferior *inf, int from_tty) |
c3f6f71d | 1944 | { |
dfd4cc63 | 1945 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b | 1946 | |
c3f6f71d | 1947 | if (from_tty) |
c906108c | 1948 | { |
995816ba | 1949 | const char *exec_file; |
cc377e6b | 1950 | |
c3f6f71d | 1951 | exec_file = get_exec_file (0); |
cc377e6b | 1952 | if (exec_file == NULL) |
c3f6f71d | 1953 | exec_file = ""; |
cc377e6b | 1954 | |
a3f17187 | 1955 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
1956 | target_pid_to_str (pid_to_ptid (pid))); |
1957 | gdb_flush (gdb_stdout); | |
c906108c | 1958 | } |
19958708 | 1959 | |
6bd6f3b6 | 1960 | do_detach (); |
cc377e6b | 1961 | |
39f77062 | 1962 | inferior_ptid = null_ptid; |
7f9f62ba | 1963 | detach_inferior (pid); |
6a3cb8e8 | 1964 | inf_child_maybe_unpush_target (ops); |
c906108c SS |
1965 | } |
1966 | ||
39f77062 KB |
1967 | static ptid_t |
1968 | do_attach (ptid_t ptid) | |
c906108c | 1969 | { |
c3f6f71d | 1970 | procinfo *pi; |
181e7f93 | 1971 | struct inferior *inf; |
c3f6f71d | 1972 | int fail; |
2689673f | 1973 | int lwpid; |
c3f6f71d | 1974 | |
dfd4cc63 | 1975 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 1976 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
1977 | |
1978 | if (!open_procinfo_files (pi, FD_CTL)) | |
1979 | { | |
1980 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 1981 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 1982 | ptid_get_pid (ptid)); |
c3f6f71d JM |
1983 | dead_procinfo (pi, errmsg, NOKILL); |
1984 | } | |
c906108c | 1985 | |
c3f6f71d JM |
1986 | /* Stop the process (if it isn't already stopped). */ |
1987 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 1988 | { |
c3f6f71d JM |
1989 | pi->was_stopped = 1; |
1990 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
1991 | } |
1992 | else | |
1993 | { | |
c3f6f71d JM |
1994 | pi->was_stopped = 0; |
1995 | /* Set the process to run again when we close it. */ | |
1996 | if (!proc_set_run_on_last_close (pi)) | |
1997 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
1998 | ||
0df8b418 | 1999 | /* Now stop the process. */ |
c3f6f71d JM |
2000 | if (!proc_stop_process (pi)) |
2001 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
2002 | pi->ignore_next_sigstop = 1; | |
c906108c | 2003 | } |
c3f6f71d JM |
2004 | /* Save some of the /proc state to be restored if we detach. */ |
2005 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2006 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
2007 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
2008 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 2009 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2010 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
2011 | NOKILL); | |
37de36c6 | 2012 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 2013 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
2014 | NOKILL); |
2015 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2016 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
2017 | ||
2018 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
2019 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
2020 | ||
6c95b8df PA |
2021 | inf = current_inferior (); |
2022 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 2023 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 2024 | inf->attach_flag = 1; |
2689673f PA |
2025 | |
2026 | /* Create a procinfo for the current lwp. */ | |
2027 | lwpid = proc_get_current_thread (pi); | |
2028 | create_procinfo (pi->pid, lwpid); | |
2029 | ||
2030 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 2031 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
2032 | add_thread (ptid); |
2033 | ||
2034 | return ptid; | |
c906108c SS |
2035 | } |
2036 | ||
2037 | static void | |
6bd6f3b6 | 2038 | do_detach () |
c906108c | 2039 | { |
c3f6f71d | 2040 | procinfo *pi; |
c906108c | 2041 | |
0df8b418 | 2042 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
2043 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
2044 | 0); /* FIXME: threads */ | |
c5aa993b | 2045 | |
c3f6f71d JM |
2046 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
2047 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 2048 | |
c3f6f71d JM |
2049 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
2050 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
2051 | ||
37de36c6 | 2052 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2053 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
2054 | ||
37de36c6 | 2055 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2056 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
2057 | ||
2058 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
2059 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
2060 | ||
6bd6f3b6 SM |
2061 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
2062 | if (!(pi->was_stopped) | |
2063 | || query (_("Was stopped when attached, make it runnable again? "))) | |
c3f6f71d JM |
2064 | { |
2065 | /* Clear any pending signal. */ | |
2066 | if (!proc_clear_current_fault (pi)) | |
2067 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
2068 | ||
6bd6f3b6 | 2069 | if (!proc_clear_current_signal (pi)) |
1a303dec MS |
2070 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
2071 | ||
c3f6f71d JM |
2072 | if (!proc_set_run_on_last_close (pi)) |
2073 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
2074 | } | |
2075 | ||
c3f6f71d | 2076 | destroy_procinfo (pi); |
c906108c SS |
2077 | } |
2078 | ||
772cf8be MK |
2079 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
2080 | for all registers. | |
2081 | ||
2082 | ??? Is the following note still relevant? We can't get individual | |
2083 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
2084 | don't bother with caching at all in that case. | |
2085 | ||
2086 | NOTE: Since the /proc interface cannot give us individual | |
2087 | registers, we pay no attention to REGNUM, and just fetch them all. | |
2088 | This results in the possibility that we will do unnecessarily many | |
2089 | fetches, since we may be called repeatedly for individual | |
2090 | registers. So we cache the results, and mark the cache invalid | |
2091 | when the process is resumed. */ | |
c3f6f71d | 2092 | |
c906108c | 2093 | static void |
28439f5e PA |
2094 | procfs_fetch_registers (struct target_ops *ops, |
2095 | struct regcache *regcache, int regnum) | |
c906108c | 2096 | { |
772cf8be MK |
2097 | gdb_gregset_t *gregs; |
2098 | procinfo *pi; | |
bcc0c096 SM |
2099 | ptid_t ptid = regcache_get_ptid (regcache); |
2100 | int pid = ptid_get_pid (ptid); | |
2101 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2102 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2103 | |
2689673f | 2104 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2105 | |
2106 | if (pi == NULL) | |
8a3fe4f8 | 2107 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
bcc0c096 | 2108 | target_pid_to_str (ptid)); |
c3f6f71d | 2109 | |
772cf8be MK |
2110 | gregs = proc_get_gregs (pi); |
2111 | if (gregs == NULL) | |
c3f6f71d JM |
2112 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
2113 | ||
56be3814 | 2114 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 2115 | |
40a6adc1 | 2116 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2117 | { |
772cf8be MK |
2118 | gdb_fpregset_t *fpregs; |
2119 | ||
40a6adc1 MD |
2120 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2121 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2122 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2123 | return; /* Not a floating point register. */ |
c5aa993b | 2124 | |
772cf8be MK |
2125 | fpregs = proc_get_fpregs (pi); |
2126 | if (fpregs == NULL) | |
60054393 | 2127 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 2128 | |
56be3814 | 2129 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 2130 | } |
c906108c SS |
2131 | } |
2132 | ||
772cf8be MK |
2133 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
2134 | this for all registers. | |
2135 | ||
2136 | NOTE: Since the /proc interface will not read individual registers, | |
2137 | we will cache these requests until the process is resumed, and only | |
2138 | then write them back to the inferior process. | |
77382aee | 2139 | |
772cf8be MK |
2140 | FIXME: is that a really bad idea? Have to think about cases where |
2141 | writing one register might affect the value of others, etc. */ | |
c906108c | 2142 | |
c3f6f71d | 2143 | static void |
28439f5e PA |
2144 | procfs_store_registers (struct target_ops *ops, |
2145 | struct regcache *regcache, int regnum) | |
c3f6f71d | 2146 | { |
772cf8be MK |
2147 | gdb_gregset_t *gregs; |
2148 | procinfo *pi; | |
bcc0c096 SM |
2149 | ptid_t ptid = regcache_get_ptid (regcache); |
2150 | int pid = ptid_get_pid (ptid); | |
2151 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2152 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2153 | |
2689673f | 2154 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2155 | |
2156 | if (pi == NULL) | |
8a3fe4f8 | 2157 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
bcc0c096 | 2158 | target_pid_to_str (ptid)); |
c906108c | 2159 | |
772cf8be MK |
2160 | gregs = proc_get_gregs (pi); |
2161 | if (gregs == NULL) | |
c3f6f71d | 2162 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 2163 | |
56be3814 | 2164 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
2165 | if (!proc_set_gregs (pi)) |
2166 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 2167 | |
40a6adc1 | 2168 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2169 | { |
772cf8be MK |
2170 | gdb_fpregset_t *fpregs; |
2171 | ||
40a6adc1 MD |
2172 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2173 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2174 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2175 | return; /* Not a floating point register. */ |
60054393 | 2176 | |
772cf8be MK |
2177 | fpregs = proc_get_fpregs (pi); |
2178 | if (fpregs == NULL) | |
60054393 MS |
2179 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
2180 | ||
56be3814 | 2181 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
2182 | if (!proc_set_fpregs (pi)) |
2183 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
2184 | } | |
c3f6f71d | 2185 | } |
c906108c | 2186 | |
37de36c6 KB |
2187 | static int |
2188 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
2189 | { | |
37de36c6 KB |
2190 | if (scall == SYS_lwp_exit) |
2191 | return 1; | |
37de36c6 KB |
2192 | return 0; |
2193 | } | |
2194 | ||
2195 | static int | |
2196 | syscall_is_exit (procinfo *pi, int scall) | |
2197 | { | |
37de36c6 KB |
2198 | if (scall == SYS_exit) |
2199 | return 1; | |
37de36c6 KB |
2200 | return 0; |
2201 | } | |
2202 | ||
2203 | static int | |
2204 | syscall_is_exec (procinfo *pi, int scall) | |
2205 | { | |
2206 | #ifdef SYS_exec | |
2207 | if (scall == SYS_exec) | |
2208 | return 1; | |
2209 | #endif | |
37de36c6 KB |
2210 | if (scall == SYS_execve) |
2211 | return 1; | |
37de36c6 KB |
2212 | return 0; |
2213 | } | |
2214 | ||
2215 | static int | |
2216 | syscall_is_lwp_create (procinfo *pi, int scall) | |
2217 | { | |
37de36c6 KB |
2218 | if (scall == SYS_lwp_create) |
2219 | return 1; | |
37de36c6 KB |
2220 | return 0; |
2221 | } | |
2222 | ||
77382aee PA |
2223 | /* Retrieve the next stop event from the child process. If child has |
2224 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
2225 | (or possibly wait eventcodes) into gdb internal event codes. | |
2226 | Returns the id of process (and possibly thread) that incurred the | |
2227 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 2228 | |
39f77062 | 2229 | static ptid_t |
117de6a9 | 2230 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 2231 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 2232 | { |
0df8b418 | 2233 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 2234 | procinfo *pi; |
39f77062 KB |
2235 | int wstat; |
2236 | int temp_tid; | |
2237 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
2238 | int why, what, flags; |
2239 | int retry = 0; | |
c906108c | 2240 | |
c3f6f71d | 2241 | wait_again: |
c906108c | 2242 | |
c3f6f71d JM |
2243 | retry++; |
2244 | wstat = 0; | |
39f77062 | 2245 | retval = pid_to_ptid (-1); |
c906108c | 2246 | |
0df8b418 | 2247 | /* Find procinfo for main process. */ |
dfd4cc63 | 2248 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2249 | if (pi) |
c906108c | 2250 | { |
0df8b418 | 2251 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
2252 | pi->status_valid = 0; |
2253 | pi->gregs_valid = 0; | |
2254 | pi->fpregs_valid = 0; | |
2255 | ||
0df8b418 | 2256 | #if 0 /* just try this out... */ |
c3f6f71d JM |
2257 | flags = proc_flags (pi); |
2258 | why = proc_why (pi); | |
2259 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 2260 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
2261 | #endif |
2262 | /* If child is not stopped, wait for it to stop. */ | |
2263 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
2264 | !proc_wait_for_stop (pi)) | |
c906108c | 2265 | { |
0df8b418 | 2266 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 2267 | if (errno == ENOENT) |
c906108c | 2268 | { |
39f77062 KB |
2269 | int wait_retval; |
2270 | ||
0df8b418 MS |
2271 | /* /proc file not found; presumably child has terminated. */ |
2272 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 2273 | |
dfd4cc63 LM |
2274 | /* Wrong child? */ |
2275 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
2276 | error (_("procfs: couldn't stop " |
2277 | "process %d: wait returned %d."), | |
dfd4cc63 | 2278 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 2279 | /* FIXME: might I not just use waitpid? |
0df8b418 | 2280 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 2281 | retval = pid_to_ptid (wait_retval); |
c906108c | 2282 | } |
d1566ff5 FN |
2283 | else if (errno == EINTR) |
2284 | goto wait_again; | |
c3f6f71d | 2285 | else |
c906108c | 2286 | { |
0df8b418 | 2287 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 2288 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 2289 | } |
c3f6f71d JM |
2290 | } |
2291 | else | |
2292 | { | |
2293 | /* This long block is reached if either: | |
2294 | a) the child was already stopped, or | |
2295 | b) we successfully waited for the child with wait_for_stop. | |
2296 | This block will analyze the /proc status, and translate it | |
2297 | into a waitstatus for GDB. | |
2298 | ||
2299 | If we actually had to call wait because the /proc file | |
19958708 | 2300 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
2301 | because we already have a waitstatus. */ |
2302 | ||
2303 | flags = proc_flags (pi); | |
2304 | why = proc_why (pi); | |
2305 | what = proc_what (pi); | |
2306 | ||
c3f6f71d | 2307 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 2308 | { |
c3f6f71d JM |
2309 | /* If it's running async (for single_thread control), |
2310 | set it back to normal again. */ | |
2311 | if (flags & PR_ASYNC) | |
2312 | if (!proc_unset_async (pi)) | |
2313 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
c3f6f71d JM |
2314 | |
2315 | if (info_verbose) | |
2316 | proc_prettyprint_why (why, what, 1); | |
2317 | ||
2318 | /* The 'pid' we will return to GDB is composed of | |
2319 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 2320 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
2321 | |
2322 | switch (why) { | |
2323 | case PR_SIGNALLED: | |
2324 | wstat = (what << 8) | 0177; | |
2325 | break; | |
2326 | case PR_SYSENTRY: | |
37de36c6 | 2327 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 2328 | { |
17faa917 DJ |
2329 | if (print_thread_events) |
2330 | printf_unfiltered (_("[%s exited]\n"), | |
2331 | target_pid_to_str (retval)); | |
37de36c6 KB |
2332 | delete_thread (retval); |
2333 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2334 | return retval; | |
2335 | } | |
2336 | else if (syscall_is_exit (pi, what)) | |
2337 | { | |
181e7f93 PA |
2338 | struct inferior *inf; |
2339 | ||
0df8b418 | 2340 | /* Handle SYS_exit call only. */ |
37de36c6 | 2341 | /* Stopped at entry to SYS_exit. |
19958708 | 2342 | Make it runnable, resume it, then use |
37de36c6 | 2343 | the wait system call to get its exit code. |
19958708 | 2344 | Proc_run_process always clears the current |
37de36c6 KB |
2345 | fault and signal. |
2346 | Then return its exit status. */ | |
2347 | pi->status_valid = 0; | |
2348 | wstat = 0; | |
19958708 | 2349 | /* FIXME: what we should do is return |
37de36c6 KB |
2350 | TARGET_WAITKIND_SPURIOUS. */ |
2351 | if (!proc_run_process (pi, 0, 0)) | |
2352 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
2353 | |
2354 | inf = find_inferior_pid (pi->pid); | |
2355 | if (inf->attach_flag) | |
c3f6f71d | 2356 | { |
19958708 | 2357 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
2358 | return a "success" exit code. Bogus: what if |
2359 | it returns something else? */ | |
2360 | wstat = 0; | |
39f77062 | 2361 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
2362 | } |
2363 | else | |
2364 | { | |
2365 | int temp = wait (&wstat); | |
2366 | ||
2367 | /* FIXME: shouldn't I make sure I get the right | |
2368 | event from the right process? If (for | |
2369 | instance) I have killed an earlier inferior | |
2370 | process but failed to clean up after it | |
2371 | somehow, I could get its termination event | |
2372 | here. */ | |
2373 | ||
0df8b418 MS |
2374 | /* If wait returns -1, that's what we return |
2375 | to GDB. */ | |
37de36c6 | 2376 | if (temp < 0) |
39f77062 | 2377 | retval = pid_to_ptid (temp); |
c3f6f71d | 2378 | } |
c3f6f71d | 2379 | } |
37de36c6 KB |
2380 | else |
2381 | { | |
a3f17187 | 2382 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
2383 | proc_prettyprint_syscall (proc_what (pi), 0); |
2384 | printf_filtered ("\n"); | |
44122162 RO |
2385 | |
2386 | long i, nsysargs, *sysargs; | |
2387 | ||
2388 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2389 | (sysargs = proc_sysargs (pi)) != NULL) | |
2390 | { | |
2391 | printf_filtered (_("%ld syscall arguments:\n"), | |
2392 | nsysargs); | |
2393 | for (i = 0; i < nsysargs; i++) | |
2394 | printf_filtered ("#%ld: 0x%08lx\n", | |
2395 | i, sysargs[i]); | |
2396 | } | |
2397 | ||
37de36c6 KB |
2398 | if (status) |
2399 | { | |
0df8b418 MS |
2400 | /* How to exit gracefully, returning "unknown |
2401 | event". */ | |
37de36c6 | 2402 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2403 | return inferior_ptid; |
37de36c6 KB |
2404 | } |
2405 | else | |
2406 | { | |
2407 | /* How to keep going without returning to wfi: */ | |
049a8570 | 2408 | target_continue_no_signal (ptid); |
37de36c6 KB |
2409 | goto wait_again; |
2410 | } | |
2411 | } | |
2412 | break; | |
2413 | case PR_SYSEXIT: | |
2414 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 2415 | { |
37de36c6 KB |
2416 | /* Hopefully this is our own "fork-child" execing |
2417 | the real child. Hoax this event into a trap, and | |
2418 | GDB will see the child about to execute its start | |
0df8b418 | 2419 | address. */ |
37de36c6 KB |
2420 | wstat = (SIGTRAP << 8) | 0177; |
2421 | } | |
2422 | else if (syscall_is_lwp_create (pi, what)) | |
2423 | { | |
77382aee PA |
2424 | /* This syscall is somewhat like fork/exec. We |
2425 | will get the event twice: once for the parent | |
2426 | LWP, and once for the child. We should already | |
2427 | know about the parent LWP, but the child will | |
2428 | be new to us. So, whenever we get this event, | |
2429 | if it represents a new thread, simply add the | |
2430 | thread to the list. */ | |
c3f6f71d | 2431 | |
37de36c6 | 2432 | /* If not in procinfo list, add it. */ |
39f77062 KB |
2433 | temp_tid = proc_get_current_thread (pi); |
2434 | if (!find_procinfo (pi->pid, temp_tid)) | |
2435 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 2436 | |
dfd4cc63 | 2437 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 2438 | /* If not in GDB's thread list, add it. */ |
39f77062 | 2439 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
2440 | add_thread (temp_ptid); |
2441 | ||
0df8b418 | 2442 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 2443 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2444 | return inferior_ptid; |
37de36c6 KB |
2445 | } |
2446 | else if (syscall_is_lwp_exit (pi, what)) | |
2447 | { | |
17faa917 DJ |
2448 | if (print_thread_events) |
2449 | printf_unfiltered (_("[%s exited]\n"), | |
2450 | target_pid_to_str (retval)); | |
37de36c6 KB |
2451 | delete_thread (retval); |
2452 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2453 | return retval; | |
c3f6f71d | 2454 | } |
37de36c6 KB |
2455 | else if (0) |
2456 | { | |
2457 | /* FIXME: Do we need to handle SYS_sproc, | |
2458 | SYS_fork, or SYS_vfork here? The old procfs | |
2459 | seemed to use this event to handle threads on | |
2460 | older (non-LWP) systems, where I'm assuming | |
19958708 | 2461 | that threads were actually separate processes. |
37de36c6 KB |
2462 | Irix, maybe? Anyway, low priority for now. */ |
2463 | } | |
2464 | else | |
2465 | { | |
a3f17187 | 2466 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
2467 | proc_prettyprint_syscall (proc_what (pi), 0); |
2468 | printf_filtered ("\n"); | |
44122162 RO |
2469 | |
2470 | long i, nsysargs, *sysargs; | |
2471 | ||
2472 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2473 | (sysargs = proc_sysargs (pi)) != NULL) | |
2474 | { | |
2475 | printf_filtered (_("%ld syscall arguments:\n"), | |
2476 | nsysargs); | |
2477 | for (i = 0; i < nsysargs; i++) | |
2478 | printf_filtered ("#%ld: 0x%08lx\n", | |
2479 | i, sysargs[i]); | |
2480 | } | |
2481 | ||
37de36c6 | 2482 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2483 | return inferior_ptid; |
37de36c6 | 2484 | } |
c3f6f71d JM |
2485 | break; |
2486 | case PR_REQUESTED: | |
2487 | #if 0 /* FIXME */ | |
2488 | wstat = (SIGSTOP << 8) | 0177; | |
2489 | break; | |
2490 | #else | |
2491 | if (retry < 5) | |
2492 | { | |
a3f17187 | 2493 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
2494 | pi->status_valid = 0; |
2495 | goto wait_again; | |
2496 | } | |
2497 | else | |
2498 | { | |
2499 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
2500 | temp_tid = proc_get_current_thread (pi); |
2501 | if (!find_procinfo (pi->pid, temp_tid)) | |
2502 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
2503 | |
2504 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 2505 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 2506 | if (!in_thread_list (temp_ptid)) |
93815fbf | 2507 | add_thread (temp_ptid); |
c3f6f71d JM |
2508 | |
2509 | status->kind = TARGET_WAITKIND_STOPPED; | |
b196bc4c | 2510 | status->value.sig = GDB_SIGNAL_0; |
c3f6f71d JM |
2511 | return retval; |
2512 | } | |
2513 | #endif | |
2514 | case PR_JOBCONTROL: | |
2515 | wstat = (what << 8) | 0177; | |
2516 | break; | |
2517 | case PR_FAULTED: | |
7af6341f | 2518 | switch (what) { |
c3f6f71d JM |
2519 | case FLTWATCH: |
2520 | wstat = (SIGTRAP << 8) | 0177; | |
2521 | break; | |
0df8b418 | 2522 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 2523 | case FLTPRIV: |
c3f6f71d | 2524 | case FLTILL: |
c3f6f71d JM |
2525 | wstat = (SIGILL << 8) | 0177; |
2526 | break; | |
2527 | case FLTBPT: | |
c3f6f71d | 2528 | case FLTTRACE: |
c3f6f71d JM |
2529 | wstat = (SIGTRAP << 8) | 0177; |
2530 | break; | |
2531 | case FLTSTACK: | |
2532 | case FLTACCESS: | |
c3f6f71d | 2533 | case FLTBOUNDS: |
c3f6f71d JM |
2534 | wstat = (SIGSEGV << 8) | 0177; |
2535 | break; | |
2536 | case FLTIOVF: | |
2537 | case FLTIZDIV: | |
c3f6f71d | 2538 | case FLTFPE: |
c3f6f71d JM |
2539 | wstat = (SIGFPE << 8) | 0177; |
2540 | break; | |
3e43a32a | 2541 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
2542 | default: /* FIXME: use si_signo if possible for |
2543 | fault. */ | |
39f77062 | 2544 | retval = pid_to_ptid (-1); |
c3f6f71d | 2545 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 2546 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2547 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2548 | error (_("... giving up...")); |
c3f6f71d JM |
2549 | break; |
2550 | } | |
2551 | break; /* case PR_FAULTED: */ | |
2552 | default: /* switch (why) unmatched */ | |
2553 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 2554 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2555 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2556 | error (_("... giving up...")); |
c3f6f71d JM |
2557 | break; |
2558 | } | |
77382aee PA |
2559 | /* Got this far without error: If retval isn't in the |
2560 | threads database, add it. */ | |
dfd4cc63 | 2561 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 2562 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 2563 | !in_thread_list (retval)) |
c906108c | 2564 | { |
77382aee PA |
2565 | /* We have a new thread. We need to add it both to |
2566 | GDB's list and to our own. If we don't create a | |
2567 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 2568 | add_thread (retval); |
dfd4cc63 LM |
2569 | if (find_procinfo (ptid_get_pid (retval), |
2570 | ptid_get_lwp (retval)) == NULL) | |
2571 | create_procinfo (ptid_get_pid (retval), | |
2572 | ptid_get_lwp (retval)); | |
c906108c | 2573 | } |
c906108c | 2574 | } |
0df8b418 | 2575 | else /* Flags do not indicate STOPPED. */ |
c906108c | 2576 | { |
0df8b418 | 2577 | /* surely this can't happen... */ |
c3f6f71d JM |
2578 | printf_filtered ("procfs:%d -- process not stopped.\n", |
2579 | __LINE__); | |
2580 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 2581 | error (_("procfs: ...giving up...")); |
c906108c | 2582 | } |
c906108c | 2583 | } |
c906108c | 2584 | |
c3f6f71d JM |
2585 | if (status) |
2586 | store_waitstatus (status, wstat); | |
c906108c SS |
2587 | } |
2588 | ||
c3f6f71d JM |
2589 | return retval; |
2590 | } | |
c906108c | 2591 | |
4e73f23d RM |
2592 | /* Perform a partial transfer to/from the specified object. For |
2593 | memory transfers, fall back to the old memory xfer functions. */ | |
2594 | ||
9b409511 | 2595 | static enum target_xfer_status |
4e73f23d | 2596 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
0b62613e | 2597 | const char *annex, gdb_byte *readbuf, |
9b409511 YQ |
2598 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
2599 | ULONGEST *xfered_len) | |
4e73f23d RM |
2600 | { |
2601 | switch (object) | |
2602 | { | |
2603 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 2604 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d | 2605 | |
4e73f23d | 2606 | case TARGET_OBJECT_AUXV: |
9f2982ff | 2607 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
9b409511 | 2608 | offset, len, xfered_len); |
4e73f23d RM |
2609 | |
2610 | default: | |
e75fdfca TT |
2611 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2612 | readbuf, writebuf, offset, len, | |
2613 | xfered_len); | |
4e73f23d RM |
2614 | } |
2615 | } | |
2616 | ||
e96027e0 PA |
2617 | /* Helper for procfs_xfer_partial that handles memory transfers. |
2618 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 2619 | |
e96027e0 PA |
2620 | static enum target_xfer_status |
2621 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2622 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
2623 | { |
2624 | procinfo *pi; | |
e96027e0 | 2625 | int nbytes; |
c906108c | 2626 | |
0df8b418 | 2627 | /* Find procinfo for main process. */ |
dfd4cc63 | 2628 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2629 | if (pi->as_fd == 0 && |
2630 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 2631 | { |
c3f6f71d | 2632 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 2633 | return TARGET_XFER_E_IO; |
c906108c | 2634 | } |
c906108c | 2635 | |
e96027e0 PA |
2636 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
2637 | return TARGET_XFER_E_IO; | |
2638 | ||
2639 | if (writebuf != NULL) | |
c906108c | 2640 | { |
e96027e0 PA |
2641 | PROCFS_NOTE ("write memory:\n"); |
2642 | nbytes = write (pi->as_fd, writebuf, len); | |
2643 | } | |
2644 | else | |
2645 | { | |
2646 | PROCFS_NOTE ("read memory:\n"); | |
2647 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 2648 | } |
e96027e0 PA |
2649 | if (nbytes <= 0) |
2650 | return TARGET_XFER_E_IO; | |
2651 | *xfered_len = nbytes; | |
2652 | return TARGET_XFER_OK; | |
c906108c SS |
2653 | } |
2654 | ||
77382aee PA |
2655 | /* Called by target_resume before making child runnable. Mark cached |
2656 | registers and status's invalid. If there are "dirty" caches that | |
2657 | need to be written back to the child process, do that. | |
c906108c | 2658 | |
77382aee PA |
2659 | File descriptors are also cached. As they are a limited resource, |
2660 | we cannot hold onto them indefinitely. However, as they are | |
2661 | expensive to open, we don't want to throw them away | |
2662 | indescriminately either. As a compromise, we will keep the file | |
2663 | descriptors for the parent process, but discard any file | |
2664 | descriptors we may have accumulated for the threads. | |
2665 | ||
2666 | As this function is called by iterate_over_threads, it always | |
2667 | returns zero (so that iterate_over_threads will keep | |
2668 | iterating). */ | |
c3f6f71d JM |
2669 | |
2670 | static int | |
fba45db2 | 2671 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 2672 | { |
77382aee PA |
2673 | /* About to run the child; invalidate caches and do any other |
2674 | cleanup. */ | |
c906108c | 2675 | |
c3f6f71d JM |
2676 | #if 0 |
2677 | if (pi->gregs_dirty) | |
2678 | if (parent == NULL || | |
2679 | proc_get_current_thread (parent) != pi->tid) | |
2680 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
2681 | proc_warn (pi, "target_resume, set_gregs", | |
2682 | __LINE__); | |
f5656ead | 2683 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
2684 | if (pi->fpregs_dirty) |
2685 | if (parent == NULL || | |
2686 | proc_get_current_thread (parent) != pi->tid) | |
2687 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 2688 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 2689 | __LINE__); |
c906108c | 2690 | #endif |
c906108c | 2691 | |
c3f6f71d | 2692 | if (parent != NULL) |
c906108c | 2693 | { |
c3f6f71d | 2694 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 2695 | Close any file descriptors that it might have open. |
c3f6f71d JM |
2696 | We don't do this to the master (parent) procinfo. */ |
2697 | ||
2698 | close_procinfo_files (pi); | |
c906108c | 2699 | } |
c3f6f71d JM |
2700 | pi->gregs_valid = 0; |
2701 | pi->fpregs_valid = 0; | |
2702 | #if 0 | |
2703 | pi->gregs_dirty = 0; | |
2704 | pi->fpregs_dirty = 0; | |
c906108c | 2705 | #endif |
c3f6f71d JM |
2706 | pi->status_valid = 0; |
2707 | pi->threads_valid = 0; | |
c906108c | 2708 | |
c3f6f71d | 2709 | return 0; |
c906108c SS |
2710 | } |
2711 | ||
0fda6bd2 | 2712 | #if 0 |
77382aee PA |
2713 | /* A callback function for iterate_over_threads. Find the |
2714 | asynchronous signal thread, and make it runnable. See if that | |
2715 | helps matters any. */ | |
c906108c | 2716 | |
c3f6f71d | 2717 | static int |
fba45db2 | 2718 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 2719 | { |
c3f6f71d JM |
2720 | #ifdef PR_ASLWP |
2721 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 2722 | { |
c3f6f71d JM |
2723 | if (!proc_run_process (pi, 0, -1)) |
2724 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
2725 | return 1; | |
c906108c | 2726 | } |
c906108c | 2727 | #endif |
c3f6f71d | 2728 | return 0; |
c906108c | 2729 | } |
0fda6bd2 | 2730 | #endif |
c906108c | 2731 | |
77382aee PA |
2732 | /* Make the child process runnable. Normally we will then call |
2733 | procfs_wait and wait for it to stop again (unless gdb is async). | |
2734 | ||
2735 | If STEP is true, then arrange for the child to stop again after | |
2736 | executing a single instruction. If SIGNO is zero, then cancel any | |
2737 | pending signal; if non-zero, then arrange for the indicated signal | |
2738 | to be delivered to the child when it runs. If PID is -1, then | |
2739 | allow any child thread to run; if non-zero, then allow only the | |
2740 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
2741 | |
2742 | static void | |
28439f5e | 2743 | procfs_resume (struct target_ops *ops, |
2ea28649 | 2744 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 2745 | { |
c3f6f71d JM |
2746 | procinfo *pi, *thread; |
2747 | int native_signo; | |
2748 | ||
19958708 | 2749 | /* 2.1: |
c3f6f71d | 2750 | prrun.prflags |= PRSVADDR; |
19958708 | 2751 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 2752 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 2753 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
2754 | prrun.prflags |= PRCFAULT; clear current fault. |
2755 | ||
2756 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 2757 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
2758 | PRSVADDR is unnecessary. |
2759 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
2760 | This basically leaves PRSTEP and PRCSIG. | |
2761 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
2762 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 2763 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 2764 | |
0df8b418 | 2765 | /* Find procinfo for main process. */ |
dfd4cc63 | 2766 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2767 | |
77382aee | 2768 | /* First cut: ignore pid argument. */ |
c3f6f71d | 2769 | errno = 0; |
c906108c | 2770 | |
c3f6f71d JM |
2771 | /* Convert signal to host numbering. */ |
2772 | if (signo == 0 || | |
a493e3e2 | 2773 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
2774 | native_signo = 0; |
2775 | else | |
2ea28649 | 2776 | native_signo = gdb_signal_to_host (signo); |
c906108c | 2777 | |
c3f6f71d | 2778 | pi->ignore_next_sigstop = 0; |
c906108c | 2779 | |
77382aee PA |
2780 | /* Running the process voids all cached registers and status. */ |
2781 | /* Void the threads' caches first. */ | |
19958708 | 2782 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
2783 | /* Void the process procinfo's caches. */ |
2784 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 2785 | |
dfd4cc63 | 2786 | if (ptid_get_pid (ptid) != -1) |
c906108c | 2787 | { |
77382aee PA |
2788 | /* Resume a specific thread, presumably suppressing the |
2789 | others. */ | |
dfd4cc63 | 2790 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 2791 | if (thread != NULL) |
c906108c | 2792 | { |
c3f6f71d JM |
2793 | if (thread->tid != 0) |
2794 | { | |
77382aee PA |
2795 | /* We're to resume a specific thread, and not the |
2796 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
2797 | if (!proc_set_async (pi)) |
2798 | proc_error (pi, "target_resume, set_async", __LINE__); | |
c3f6f71d | 2799 | #if 0 |
19958708 | 2800 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
2801 | make_signal_thread_runnable, |
2802 | NULL); | |
2803 | #endif | |
0df8b418 MS |
2804 | pi = thread; /* Substitute the thread's procinfo |
2805 | for run. */ | |
c3f6f71d | 2806 | } |
c906108c SS |
2807 | } |
2808 | } | |
c906108c | 2809 | |
c3f6f71d | 2810 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 2811 | { |
c3f6f71d | 2812 | if (errno == EBUSY) |
77382aee PA |
2813 | warning (_("resume: target already running. " |
2814 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
2815 | else |
2816 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 2817 | } |
c3f6f71d | 2818 | } |
c906108c | 2819 | |
77382aee | 2820 | /* Set up to trace signals in the child process. */ |
c906108c | 2821 | |
c3f6f71d | 2822 | static void |
94bedb42 TT |
2823 | procfs_pass_signals (struct target_ops *self, |
2824 | int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 2825 | { |
44122162 | 2826 | sigset_t signals; |
dfd4cc63 | 2827 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 2828 | int signo; |
c906108c | 2829 | |
2455069d UW |
2830 | prfillset (&signals); |
2831 | ||
2832 | for (signo = 0; signo < NSIG; signo++) | |
2833 | { | |
2ea28649 | 2834 | int target_signo = gdb_signal_from_host (signo); |
2455069d | 2835 | if (target_signo < numsigs && pass_signals[target_signo]) |
44122162 | 2836 | prdelset (&signals, signo); |
2455069d UW |
2837 | } |
2838 | ||
2839 | if (!proc_set_traced_signals (pi, &signals)) | |
2840 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 2841 | } |
c906108c | 2842 | |
77382aee | 2843 | /* Print status information about the child process. */ |
c906108c | 2844 | |
c3f6f71d | 2845 | static void |
fba45db2 | 2846 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 2847 | { |
181e7f93 | 2848 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 2849 | |
a3f17187 | 2850 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 2851 | inf->attach_flag? "attached": "child", |
39f77062 | 2852 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 2853 | } |
c906108c | 2854 | |
77382aee PA |
2855 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
2856 | should only be applied to the real process, not to an LWP, because | |
2857 | of the check for parent-process. If we need this to work for an | |
2858 | LWP, it needs some more logic. */ | |
c906108c | 2859 | |
c3f6f71d | 2860 | static void |
fba45db2 | 2861 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
2862 | { |
2863 | int parent_pid; | |
c906108c | 2864 | |
c3f6f71d | 2865 | parent_pid = proc_parent_pid (pi); |
c3f6f71d | 2866 | if (!proc_kill (pi, SIGKILL)) |
103b3ef5 | 2867 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d | 2868 | destroy_procinfo (pi); |
c906108c | 2869 | |
c3f6f71d JM |
2870 | /* If pi is GDB's child, wait for it to die. */ |
2871 | if (parent_pid == getpid ()) | |
19958708 | 2872 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
2873 | Should we check the returned event? */ |
2874 | { | |
0d06e24b | 2875 | #if 0 |
c3f6f71d | 2876 | int status, ret; |
c906108c | 2877 | |
c3f6f71d JM |
2878 | ret = waitpid (pi->pid, &status, 0); |
2879 | #else | |
2880 | wait (NULL); | |
2881 | #endif | |
2882 | } | |
2883 | } | |
c906108c | 2884 | |
77382aee PA |
2885 | /* We're done debugging it, and we want it to go away. Then we want |
2886 | GDB to forget all about it. */ | |
c906108c | 2887 | |
19958708 | 2888 | static void |
7d85a9c0 | 2889 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 2890 | { |
39f77062 | 2891 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 2892 | { |
0df8b418 | 2893 | /* Find procinfo for main process. */ |
dfd4cc63 | 2894 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 2895 | |
c3f6f71d JM |
2896 | if (pi) |
2897 | unconditionally_kill_inferior (pi); | |
bc1e6c81 | 2898 | target_mourn_inferior (inferior_ptid); |
c906108c | 2899 | } |
c3f6f71d JM |
2900 | } |
2901 | ||
77382aee | 2902 | /* Forget we ever debugged this thing! */ |
c906108c | 2903 | |
19958708 | 2904 | static void |
136d6dae | 2905 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
2906 | { |
2907 | procinfo *pi; | |
c906108c | 2908 | |
39f77062 | 2909 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 2910 | { |
0df8b418 | 2911 | /* Find procinfo for main process. */ |
dfd4cc63 | 2912 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2913 | if (pi) |
2914 | destroy_procinfo (pi); | |
c906108c | 2915 | } |
6a3cb8e8 PA |
2916 | |
2917 | generic_mourn_inferior (); | |
8181d85f | 2918 | |
6a3cb8e8 | 2919 | inf_child_maybe_unpush_target (ops); |
c3f6f71d | 2920 | } |
c906108c | 2921 | |
77382aee PA |
2922 | /* When GDB forks to create a runnable inferior process, this function |
2923 | is called on the parent side of the fork. It's job is to do | |
2924 | whatever is necessary to make the child ready to be debugged, and | |
2925 | then wait for the child to synchronize. */ | |
c906108c | 2926 | |
19958708 | 2927 | static void |
28439f5e | 2928 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
2929 | { |
2930 | procinfo *pi; | |
44122162 | 2931 | sigset_t signals; |
c3f6f71d | 2932 | int fail; |
2689673f | 2933 | int lwpid; |
c906108c | 2934 | |
c3f6f71d JM |
2935 | /* This routine called on the parent side (GDB side) |
2936 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
2937 | if (!target_is_pushed (ops)) |
2938 | push_target (ops); | |
c906108c | 2939 | |
c3f6f71d | 2940 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 2941 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
2942 | |
2943 | if (!open_procinfo_files (pi, FD_CTL)) | |
2944 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
2945 | ||
2946 | /* | |
2947 | xmalloc // done | |
2948 | open_procinfo_files // done | |
2949 | link list // done | |
2950 | prfillset (trace) | |
2951 | procfs_notice_signals | |
2952 | prfillset (fault) | |
2953 | prdelset (FLTPAGE) | |
2954 | PIOCWSTOP | |
2955 | PIOCSFAULT | |
2956 | */ | |
2957 | ||
77382aee | 2958 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
2959 | if (!(proc_flags (pi) & PR_STOPPED) && |
2960 | !(proc_wait_for_stop (pi))) | |
2961 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
2962 | ||
2963 | /* Save some of the /proc state to be restored if we detach. */ | |
2964 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 2965 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
2966 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
2967 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
2968 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2969 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
2970 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2971 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 2972 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 2973 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 2974 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2975 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
2976 | ||
c3f6f71d JM |
2977 | if ((fail = procfs_debug_inferior (pi)) != 0) |
2978 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
2979 | ||
0d06e24b JM |
2980 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
2981 | and possibly even turning ON kill-on-last-close at this point. But | |
2982 | I can't make that change without careful testing which I don't have | |
2983 | time to do right now... */ | |
c3f6f71d JM |
2984 | /* Turn on run-on-last-close flag so that the child |
2985 | will die if GDB goes away for some reason. */ | |
2986 | if (!proc_set_run_on_last_close (pi)) | |
2987 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
2988 | ||
2689673f PA |
2989 | /* We now have have access to the lwpid of the main thread/lwp. */ |
2990 | lwpid = proc_get_current_thread (pi); | |
2991 | ||
2992 | /* Create a procinfo for the main lwp. */ | |
2993 | create_procinfo (pid, lwpid); | |
2994 | ||
2995 | /* We already have a main thread registered in the thread table at | |
2996 | this point, but it didn't have any lwp info yet. Notify the core | |
2997 | about it. This changes inferior_ptid as well. */ | |
2998 | thread_change_ptid (pid_to_ptid (pid), | |
793e1c06 | 2999 | ptid_build (pid, lwpid, 0)); |
c906108c | 3000 | |
2090129c | 3001 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c3f6f71d | 3002 | } |
c906108c | 3003 | |
77382aee PA |
3004 | /* When GDB forks to create a new process, this function is called on |
3005 | the child side of the fork before GDB exec's the user program. Its | |
3006 | job is to make the child minimally debuggable, so that the parent | |
3007 | GDB process can connect to the child and take over. This function | |
3008 | should do only the minimum to make that possible, and to | |
3009 | synchronize with the parent process. The parent process should | |
3010 | take care of the details. */ | |
c3f6f71d JM |
3011 | |
3012 | static void | |
fba45db2 | 3013 | procfs_set_exec_trap (void) |
c3f6f71d JM |
3014 | { |
3015 | /* This routine called on the child side (inferior side) | |
3016 | after GDB forks the inferior. It must use only local variables, | |
3017 | because it may be sharing data space with its parent. */ | |
c906108c | 3018 | |
c3f6f71d | 3019 | procinfo *pi; |
37de36c6 | 3020 | sysset_t *exitset; |
c906108c | 3021 | |
c3f6f71d | 3022 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 3023 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 3024 | |
c3f6f71d JM |
3025 | if (open_procinfo_files (pi, FD_CTL) == 0) |
3026 | { | |
3027 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
3028 | gdb_flush (gdb_stderr); | |
77382aee PA |
3029 | /* No need to call "dead_procinfo", because we're going to |
3030 | exit. */ | |
c3f6f71d JM |
3031 | _exit (127); |
3032 | } | |
c906108c | 3033 | |
44122162 | 3034 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
3035 | /* GW: Rationale... |
3036 | Not all systems with /proc have all the exec* syscalls with the same | |
3037 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 3038 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 3039 | |
37de36c6 | 3040 | exitset = sysset_t_alloc (pi); |
44122162 | 3041 | premptyset (exitset); |
c3f6f71d | 3042 | #ifdef SYS_exec |
44122162 | 3043 | praddset (exitset, SYS_exec); |
c906108c | 3044 | #endif |
44122162 | 3045 | praddset (exitset, SYS_execve); |
37de36c6 KB |
3046 | |
3047 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 3048 | { |
c3f6f71d JM |
3049 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
3050 | gdb_flush (gdb_stderr); | |
3051 | _exit (127); | |
c906108c | 3052 | } |
c3f6f71d | 3053 | |
0df8b418 | 3054 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
3055 | /* Turn off inherit on fork flag so that all grand-children |
3056 | of gdb start with tracing flags cleared. */ | |
3057 | if (!proc_unset_inherit_on_fork (pi)) | |
3058 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
3059 | ||
3060 | /* Turn off run on last close flag, so that the child process | |
3061 | cannot run away just because we close our handle on it. | |
3062 | We want it to wait for the parent to attach. */ | |
3063 | if (!proc_unset_run_on_last_close (pi)) | |
3064 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
3065 | ||
19958708 | 3066 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 3067 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 3068 | /*destroy_procinfo (pi);*/ |
c906108c | 3069 | } |
c906108c | 3070 | |
77382aee PA |
3071 | /* This function is called BEFORE gdb forks the inferior process. Its |
3072 | only real responsibility is to set things up for the fork, and tell | |
3073 | GDB which two functions to call after the fork (one for the parent, | |
3074 | and one for the child). | |
3075 | ||
3076 | This function does a complicated search for a unix shell program, | |
3077 | which it then uses to parse arguments and environment variables to | |
3078 | be sent to the child. I wonder whether this code could not be | |
3079 | abstracted out and shared with other unix targets such as | |
3080 | inf-ptrace? */ | |
c906108c SS |
3081 | |
3082 | static void | |
7c5ded6a SDJ |
3083 | procfs_create_inferior (struct target_ops *ops, const char *exec_file, |
3084 | const std::string &allargs, char **env, int from_tty) | |
c906108c SS |
3085 | { |
3086 | char *shell_file = getenv ("SHELL"); | |
3087 | char *tryname; | |
28439f5e PA |
3088 | int pid; |
3089 | ||
c906108c SS |
3090 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
3091 | { | |
3092 | ||
3093 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
3094 | just do this the normal way (via execlp, which operates by |
3095 | attempting an exec for each element of the PATH until it | |
3096 | finds one which succeeds), then there will be an exec for | |
3097 | each failed attempt, each of which will cause a PR_SYSEXIT | |
3098 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
3099 | for these failed execs with the ones for successful execs | |
3100 | (whether the exec has succeeded is stored at that time in the | |
3101 | carry bit or some such architecture-specific and | |
3102 | non-ABI-specified place). | |
3103 | ||
3104 | So I can't think of anything better than to search the PATH | |
3105 | now. This has several disadvantages: (1) There is a race | |
3106 | condition; if we find a file now and it is deleted before we | |
3107 | exec it, we lose, even if the deletion leaves a valid file | |
3108 | further down in the PATH, (2) there is no way to know exactly | |
3109 | what an executable (in the sense of "capable of being | |
3110 | exec'd") file is. Using access() loses because it may lose | |
3111 | if the caller is the superuser; failing to use it loses if | |
3112 | there are ACLs or some such. */ | |
c906108c | 3113 | |
995816ba PA |
3114 | const char *p; |
3115 | const char *p1; | |
c906108c | 3116 | /* FIXME-maybe: might want "set path" command so user can change what |
c3f6f71d | 3117 | path is used from within GDB. */ |
995816ba | 3118 | const char *path = getenv ("PATH"); |
c906108c SS |
3119 | int len; |
3120 | struct stat statbuf; | |
3121 | ||
3122 | if (path == NULL) | |
3123 | path = "/bin:/usr/bin"; | |
3124 | ||
b196bc4c | 3125 | tryname = (char *) alloca (strlen (path) + strlen (shell_file) + 2); |
c3f6f71d | 3126 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
3127 | { |
3128 | p1 = strchr (p, ':'); | |
3129 | if (p1 != NULL) | |
3130 | len = p1 - p; | |
3131 | else | |
3132 | len = strlen (p); | |
3133 | strncpy (tryname, p, len); | |
3134 | tryname[len] = '\0'; | |
3135 | strcat (tryname, "/"); | |
3136 | strcat (tryname, shell_file); | |
3137 | if (access (tryname, X_OK) < 0) | |
3138 | continue; | |
3139 | if (stat (tryname, &statbuf) < 0) | |
3140 | continue; | |
3141 | if (!S_ISREG (statbuf.st_mode)) | |
3142 | /* We certainly need to reject directories. I'm not quite | |
3143 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
3144 | that people want to exec() these things. */ | |
3145 | continue; | |
3146 | break; | |
3147 | } | |
3148 | if (p == NULL) | |
3149 | /* Not found. This must be an error rather than merely passing | |
3150 | the file to execlp(), because execlp() would try all the | |
3151 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 3152 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 3153 | __LINE__, shell_file); |
c906108c SS |
3154 | |
3155 | shell_file = tryname; | |
3156 | } | |
3157 | ||
28439f5e | 3158 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 3159 | NULL, NULL, shell_file, NULL); |
28439f5e | 3160 | |
2090129c SDJ |
3161 | /* We have something that executes now. We'll be running through |
3162 | the shell at this point (if startup-with-shell is true), but the | |
3163 | pid shouldn't change. */ | |
3164 | add_thread_silent (pid_to_ptid (pid)); | |
3165 | ||
28439f5e | 3166 | procfs_init_inferior (ops, pid); |
27087a3d JB |
3167 | } |
3168 | ||
3169 | /* An observer for the "inferior_created" event. */ | |
c906108c | 3170 | |
27087a3d JB |
3171 | static void |
3172 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
3173 | { | |
c906108c SS |
3174 | } |
3175 | ||
e8032dde | 3176 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 3177 | |
c3f6f71d | 3178 | static int |
fba45db2 | 3179 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 3180 | { |
dfd4cc63 | 3181 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 3182 | |
2689673f | 3183 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 3184 | add_thread (gdb_threadid); |
c906108c | 3185 | |
c3f6f71d JM |
3186 | return 0; |
3187 | } | |
3188 | ||
77382aee PA |
3189 | /* Query all the threads that the target knows about, and give them |
3190 | back to GDB to add to its list. */ | |
c3f6f71d | 3191 | |
d3581e61 | 3192 | static void |
e8032dde | 3193 | procfs_update_thread_list (struct target_ops *ops) |
c3f6f71d JM |
3194 | { |
3195 | procinfo *pi; | |
3196 | ||
e8032dde PA |
3197 | prune_threads (); |
3198 | ||
0df8b418 | 3199 | /* Find procinfo for main process. */ |
dfd4cc63 | 3200 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3201 | proc_update_threads (pi); |
3202 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
3203 | } |
3204 | ||
77382aee PA |
3205 | /* Return true if the thread is still 'alive'. This guy doesn't |
3206 | really seem to be doing his job. Got to investigate how to tell | |
3207 | when a thread is really gone. */ | |
c906108c | 3208 | |
c906108c | 3209 | static int |
28439f5e | 3210 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 3211 | { |
c3f6f71d JM |
3212 | int proc, thread; |
3213 | procinfo *pi; | |
c906108c | 3214 | |
dfd4cc63 LM |
3215 | proc = ptid_get_pid (ptid); |
3216 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 3217 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
3218 | if ((pi = find_procinfo (proc, thread)) == NULL) |
3219 | return 0; | |
3220 | ||
3221 | /* If I can't get its status, it ain't alive! | |
3222 | What's more, I need to forget about it! */ | |
3223 | if (!proc_get_status (pi)) | |
3224 | { | |
3225 | destroy_procinfo (pi); | |
3226 | return 0; | |
3227 | } | |
77382aee PA |
3228 | /* I couldn't have got its status if it weren't alive, so it's |
3229 | alive. */ | |
c3f6f71d | 3230 | return 1; |
c906108c | 3231 | } |
c3f6f71d | 3232 | |
77382aee PA |
3233 | /* Convert PTID to a string. Returns the string in a static |
3234 | buffer. */ | |
c3f6f71d | 3235 | |
7a114964 | 3236 | static const char * |
117de6a9 | 3237 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
3238 | { |
3239 | static char buf[80]; | |
c3f6f71d | 3240 | |
dfd4cc63 LM |
3241 | if (ptid_get_lwp (ptid) == 0) |
3242 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 3243 | else |
dfd4cc63 | 3244 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
3245 | |
3246 | return buf; | |
c3f6f71d JM |
3247 | } |
3248 | ||
77382aee | 3249 | /* Insert a watchpoint. */ |
c3f6f71d | 3250 | |
a0911fd0 | 3251 | static int |
39f77062 | 3252 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 3253 | int after) |
c906108c | 3254 | { |
c3f6f71d | 3255 | int pflags = 0; |
19958708 | 3256 | procinfo *pi; |
c3f6f71d | 3257 | |
dfd4cc63 LM |
3258 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
3259 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
3260 | 0); | |
c3f6f71d | 3261 | |
0df8b418 MS |
3262 | /* Translate from GDB's flags to /proc's. */ |
3263 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 3264 | { |
0df8b418 | 3265 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
3266 | case hw_write: /* default watchpoint (write) */ |
3267 | pflags = WRITE_WATCHFLAG; | |
3268 | break; | |
3269 | case hw_read: /* read watchpoint */ | |
3270 | pflags = READ_WATCHFLAG; | |
3271 | break; | |
3272 | case hw_access: /* access watchpoint */ | |
3273 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
3274 | break; | |
3275 | case hw_execute: /* execution HW breakpoint */ | |
3276 | pflags = EXEC_WATCHFLAG; | |
3277 | break; | |
0df8b418 | 3278 | default: /* Something weird. Return error. */ |
c906108c | 3279 | return -1; |
c3f6f71d | 3280 | } |
0df8b418 | 3281 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
3282 | pflags |= AFTER_WATCHFLAG; |
3283 | } | |
3284 | ||
3285 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
3286 | { | |
0df8b418 | 3287 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
3288 | return -1; /* fail */ |
3289 | /* GDB may try to remove the same watchpoint twice. | |
3290 | If a remove request returns no match, don't error. */ | |
c906108c | 3291 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
3292 | return 0; /* ignore */ |
3293 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c SS |
3294 | } |
3295 | return 0; | |
3296 | } | |
3297 | ||
1e03ad20 KB |
3298 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
3299 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
3300 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
3301 | far. | |
19958708 | 3302 | |
1e03ad20 KB |
3303 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
3304 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 3305 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
3306 | |
3307 | static int | |
5461485a | 3308 | procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f SM |
3309 | enum bptype type, |
3310 | int cnt, int othertype) | |
1e03ad20 | 3311 | { |
1e03ad20 KB |
3312 | /* Due to the way that proc_set_watchpoint() is implemented, host |
3313 | and target pointers must be of the same size. If they are not, | |
3314 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
3315 | fact that proc_set_watchpoint() calls |
3316 | procfs_address_to_host_pointer(); a close inspection of | |
3317 | procfs_address_to_host_pointer will reveal that an internal error | |
3318 | will be generated when the host and target pointer sizes are | |
3319 | different. */ | |
f5656ead | 3320 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 3321 | |
4e906f53 | 3322 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
3323 | return 0; |
3324 | ||
3325 | /* Other tests here??? */ | |
3326 | ||
3327 | return 1; | |
1e03ad20 KB |
3328 | } |
3329 | ||
77382aee PA |
3330 | /* Returns non-zero if process is stopped on a hardware watchpoint |
3331 | fault, else returns zero. */ | |
c3f6f71d | 3332 | |
25513619 | 3333 | static int |
6a109b6b | 3334 | procfs_stopped_by_watchpoint (struct target_ops *ops) |
c906108c | 3335 | { |
c3f6f71d | 3336 | procinfo *pi; |
c906108c | 3337 | |
dfd4cc63 | 3338 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 3339 | |
c3f6f71d | 3340 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3341 | { |
c3f6f71d | 3342 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 3343 | { |
c3f6f71d JM |
3344 | if (proc_what (pi) == FLTWATCH) |
3345 | return 1; | |
c3f6f71d | 3346 | } |
c906108c SS |
3347 | } |
3348 | return 0; | |
3349 | } | |
c906108c | 3350 | |
77382aee PA |
3351 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
3352 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
3353 | address. This function is only called if | |
3354 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
3355 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
3356 | |
3357 | static int | |
3358 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
3359 | { | |
3360 | procinfo *pi; | |
3361 | ||
dfd4cc63 | 3362 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
3363 | return proc_watchpoint_address (pi, addr); |
3364 | } | |
3365 | ||
25513619 | 3366 | static int |
7bb99c53 | 3367 | procfs_insert_watchpoint (struct target_ops *self, |
f486487f SM |
3368 | CORE_ADDR addr, int len, |
3369 | enum target_hw_bp_type type, | |
0cf6dd15 | 3370 | struct expression *cond) |
25513619 | 3371 | { |
d92524f1 | 3372 | if (!target_have_steppable_watchpoint |
f5656ead | 3373 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
3374 | { |
3375 | /* When a hardware watchpoint fires off the PC will be left at | |
3376 | the instruction following the one which caused the | |
3377 | watchpoint. It will *NOT* be necessary for GDB to step over | |
3378 | the watchpoint. */ | |
3379 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
3380 | } | |
3381 | else | |
3382 | { | |
3383 | /* When a hardware watchpoint fires off the PC will be left at | |
3384 | the instruction which caused the watchpoint. It will be | |
3385 | necessary for GDB to step over the watchpoint. */ | |
3386 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
3387 | } | |
3388 | } | |
3389 | ||
3390 | static int | |
11b5219a | 3391 | procfs_remove_watchpoint (struct target_ops *self, |
f486487f SM |
3392 | CORE_ADDR addr, int len, |
3393 | enum target_hw_bp_type type, | |
0cf6dd15 | 3394 | struct expression *cond) |
25513619 PA |
3395 | { |
3396 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
3397 | } | |
3398 | ||
3399 | static int | |
31568a15 TT |
3400 | procfs_region_ok_for_hw_watchpoint (struct target_ops *self, |
3401 | CORE_ADDR addr, int len) | |
25513619 PA |
3402 | { |
3403 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
3404 | system can support "thousands" of hardware watchpoints, but gives | |
3405 | no method for finding out how many; It doesn't say anything about | |
3406 | the allowed size for the watched area either. So we just tell | |
3407 | GDB 'yes'. */ | |
3408 | return 1; | |
3409 | } | |
3410 | ||
77382aee PA |
3411 | /* Memory Mappings Functions: */ |
3412 | ||
3413 | /* Call a callback function once for each mapping, passing it the | |
3414 | mapping, an optional secondary callback function, and some optional | |
3415 | opaque data. Quit and return the first non-zero value returned | |
3416 | from the callback. | |
3417 | ||
3418 | PI is the procinfo struct for the process to be mapped. FUNC is | |
3419 | the callback function to be called by this iterator. DATA is the | |
3420 | optional opaque data to be passed to the callback function. | |
3421 | CHILD_FUNC is the optional secondary function pointer to be passed | |
3422 | to the child function. Returns the first non-zero return value | |
3423 | from the callback function, or zero. */ | |
831e682e MS |
3424 | |
3425 | static int | |
b8edc417 | 3426 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 3427 | void *data, |
19958708 | 3428 | int (*func) (struct prmap *map, |
b8edc417 | 3429 | find_memory_region_ftype child_func, |
831e682e MS |
3430 | void *data)) |
3431 | { | |
3432 | char pathname[MAX_PROC_NAME_SIZE]; | |
3433 | struct prmap *prmaps; | |
3434 | struct prmap *prmap; | |
3435 | int funcstat; | |
831e682e | 3436 | int nmap; |
831e682e | 3437 | struct stat sbuf; |
831e682e | 3438 | |
19958708 | 3439 | /* Get the number of mappings, allocate space, |
831e682e | 3440 | and read the mappings into prmaps. */ |
0df8b418 | 3441 | /* Open map fd. */ |
831e682e | 3442 | sprintf (pathname, "/proc/%d/map", pi->pid); |
831e682e | 3443 | |
5dc1a704 TT |
3444 | scoped_fd map_fd (open (pathname, O_RDONLY)); |
3445 | if (map_fd.get () < 0) | |
3446 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
831e682e | 3447 | |
19958708 | 3448 | /* Use stat to determine the file size, and compute |
831e682e | 3449 | the number of prmap_t objects it contains. */ |
5dc1a704 | 3450 | if (fstat (map_fd.get (), &sbuf) != 0) |
831e682e MS |
3451 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); |
3452 | ||
3453 | nmap = sbuf.st_size / sizeof (prmap_t); | |
3454 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5dc1a704 | 3455 | if (read (map_fd.get (), (char *) prmaps, nmap * sizeof (*prmaps)) |
831e682e MS |
3456 | != (nmap * sizeof (*prmaps))) |
3457 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
831e682e MS |
3458 | |
3459 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
3460 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5dc1a704 | 3461 | return funcstat; |
831e682e MS |
3462 | |
3463 | return 0; | |
3464 | } | |
3465 | ||
77382aee | 3466 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 3467 | function for each memory region. |
77382aee | 3468 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
3469 | |
3470 | static int | |
19958708 | 3471 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 3472 | find_memory_region_ftype func, void *data) |
be4d1333 | 3473 | { |
bf75638e | 3474 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 3475 | map->pr_size, |
be4d1333 MS |
3476 | (map->pr_mflags & MA_READ) != 0, |
3477 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 3478 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 3479 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
3480 | data); |
3481 | } | |
3482 | ||
77382aee PA |
3483 | /* External interface. Calls a callback function once for each |
3484 | mapped memory region in the child process, passing as arguments: | |
3485 | ||
3486 | CORE_ADDR virtual_address, | |
3487 | unsigned long size, | |
3488 | int read, TRUE if region is readable by the child | |
3489 | int write, TRUE if region is writable by the child | |
3490 | int execute TRUE if region is executable by the child. | |
3491 | ||
3492 | Stops iterating and returns the first non-zero value returned by | |
3493 | the callback. */ | |
be4d1333 MS |
3494 | |
3495 | static int | |
2e73927c TT |
3496 | proc_find_memory_regions (struct target_ops *self, |
3497 | find_memory_region_ftype func, void *data) | |
be4d1333 | 3498 | { |
dfd4cc63 | 3499 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3500 | |
19958708 | 3501 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
3502 | find_memory_regions_callback); |
3503 | } | |
3504 | ||
77382aee | 3505 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 3506 | |
388faa48 | 3507 | static char * |
5ae5f592 | 3508 | mappingflags (long flags) |
388faa48 MS |
3509 | { |
3510 | static char asciiflags[8]; | |
3511 | ||
3512 | strcpy (asciiflags, "-------"); | |
388faa48 MS |
3513 | if (flags & MA_STACK) |
3514 | asciiflags[1] = 's'; | |
3515 | if (flags & MA_BREAK) | |
3516 | asciiflags[2] = 'b'; | |
3517 | if (flags & MA_SHARED) | |
3518 | asciiflags[3] = 's'; | |
3519 | if (flags & MA_READ) | |
3520 | asciiflags[4] = 'r'; | |
3521 | if (flags & MA_WRITE) | |
3522 | asciiflags[5] = 'w'; | |
3523 | if (flags & MA_EXEC) | |
3524 | asciiflags[6] = 'x'; | |
3525 | return (asciiflags); | |
3526 | } | |
3527 | ||
77382aee PA |
3528 | /* Callback function, does the actual work for 'info proc |
3529 | mappings'. */ | |
831e682e | 3530 | |
831e682e | 3531 | static int |
b8edc417 | 3532 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 3533 | void *unused) |
831e682e | 3534 | { |
0b62613e | 3535 | unsigned int pr_off; |
831e682e | 3536 | |
0b62613e | 3537 | pr_off = (unsigned int) map->pr_offset; |
0b62613e | 3538 | |
f5656ead | 3539 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 3540 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
3541 | (unsigned long) map->pr_vaddr, |
3542 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3543 | (unsigned long) map->pr_size, |
0b62613e PA |
3544 | pr_off, |
3545 | mappingflags (map->pr_mflags)); | |
3546 | else | |
f6a96b83 | 3547 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
3548 | (unsigned long) map->pr_vaddr, |
3549 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3550 | (unsigned long) map->pr_size, |
0b62613e PA |
3551 | pr_off, |
3552 | mappingflags (map->pr_mflags)); | |
831e682e MS |
3553 | |
3554 | return 0; | |
3555 | } | |
3556 | ||
77382aee | 3557 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
3558 | |
3559 | static void | |
3560 | info_proc_mappings (procinfo *pi, int summary) | |
3561 | { | |
388faa48 | 3562 | if (summary) |
0df8b418 | 3563 | return; /* No output for summary mode. */ |
388faa48 | 3564 | |
a3f17187 | 3565 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 3566 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
3567 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
3568 | "Start Addr", | |
3569 | " End Addr", | |
3570 | " Size", | |
3571 | " Offset", | |
3572 | "Flags"); | |
3573 | else | |
3574 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3575 | "Start Addr", | |
3576 | " End Addr", | |
3577 | " Size", | |
3578 | " Offset", | |
3579 | "Flags"); | |
388faa48 | 3580 | |
831e682e | 3581 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
3582 | printf_filtered ("\n"); |
3583 | } | |
3584 | ||
77382aee | 3585 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
3586 | |
3587 | static void | |
7bc112c1 | 3588 | procfs_info_proc (struct target_ops *ops, const char *args, |
145b16a9 | 3589 | enum info_proc_what what) |
c906108c | 3590 | { |
c3f6f71d | 3591 | struct cleanup *old_chain; |
388faa48 MS |
3592 | procinfo *process = NULL; |
3593 | procinfo *thread = NULL; | |
388faa48 MS |
3594 | char *tmp = NULL; |
3595 | int pid = 0; | |
3596 | int tid = 0; | |
3597 | int mappings = 0; | |
c906108c | 3598 | |
145b16a9 UW |
3599 | switch (what) |
3600 | { | |
3601 | case IP_MINIMAL: | |
3602 | break; | |
3603 | ||
3604 | case IP_MAPPINGS: | |
3605 | case IP_ALL: | |
3606 | mappings = 1; | |
3607 | break; | |
3608 | ||
3609 | default: | |
3610 | error (_("Not supported on this target.")); | |
3611 | } | |
3612 | ||
c3f6f71d | 3613 | old_chain = make_cleanup (null_cleanup, 0); |
773a1edc | 3614 | gdb_argv built_argv (args); |
4fa7574e | 3615 | for (char *arg : built_argv) |
c3f6f71d | 3616 | { |
773a1edc | 3617 | if (isdigit (arg[0])) |
c3f6f71d | 3618 | { |
773a1edc | 3619 | pid = strtoul (arg, &tmp, 10); |
c3f6f71d JM |
3620 | if (*tmp == '/') |
3621 | tid = strtoul (++tmp, NULL, 10); | |
3622 | } | |
773a1edc | 3623 | else if (arg[0] == '/') |
c3f6f71d | 3624 | { |
773a1edc | 3625 | tid = strtoul (arg + 1, NULL, 10); |
c3f6f71d | 3626 | } |
c3f6f71d JM |
3627 | } |
3628 | if (pid == 0) | |
dfd4cc63 | 3629 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 3630 | if (pid == 0) |
8a3fe4f8 | 3631 | error (_("No current process: you must name one.")); |
c3f6f71d | 3632 | else |
c906108c | 3633 | { |
c3f6f71d | 3634 | /* Have pid, will travel. |
0df8b418 | 3635 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
3636 | process = find_procinfo (pid, 0); |
3637 | if (process == NULL) | |
3638 | { | |
19958708 | 3639 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
3640 | remember to close it again when finished. */ |
3641 | process = create_procinfo (pid, 0); | |
004527cb | 3642 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
3643 | if (!open_procinfo_files (process, FD_CTL)) |
3644 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
3645 | } | |
c906108c | 3646 | } |
c3f6f71d JM |
3647 | if (tid != 0) |
3648 | thread = create_procinfo (pid, tid); | |
3649 | ||
3650 | if (process) | |
3651 | { | |
a3f17187 | 3652 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
3653 | proc_prettyprint_flags (proc_flags (process), 1); |
3654 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
3655 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
3656 | if (proc_get_nthreads (process) > 1) | |
19958708 | 3657 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
3658 | proc_get_nthreads (process)); |
3659 | } | |
3660 | if (thread) | |
3661 | { | |
a3f17187 | 3662 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
3663 | proc_prettyprint_flags (proc_flags (thread), 1); |
3664 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
3665 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
3666 | } | |
3667 | ||
388faa48 MS |
3668 | if (mappings) |
3669 | { | |
3670 | info_proc_mappings (process, 0); | |
3671 | } | |
3672 | ||
c3f6f71d | 3673 | do_cleanups (old_chain); |
c906108c SS |
3674 | } |
3675 | ||
9185ddce JB |
3676 | /* Modify the status of the system call identified by SYSCALLNUM in |
3677 | the set of syscalls that are currently traced/debugged. | |
3678 | ||
3679 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 3680 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 3681 | |
0df8b418 | 3682 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
3683 | will be disabled. */ |
3684 | ||
3685 | static void | |
3686 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 3687 | int mode, int from_tty) |
9185ddce JB |
3688 | { |
3689 | sysset_t *sysset; | |
77382aee | 3690 | |
9185ddce JB |
3691 | if (entry_or_exit == PR_SYSENTRY) |
3692 | sysset = proc_get_traced_sysentry (pi, NULL); | |
3693 | else | |
3694 | sysset = proc_get_traced_sysexit (pi, NULL); | |
3695 | ||
3696 | if (sysset == NULL) | |
3697 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
3698 | ||
3699 | if (mode == FLAG_SET) | |
44122162 | 3700 | praddset (sysset, syscallnum); |
9185ddce | 3701 | else |
44122162 | 3702 | prdelset (sysset, syscallnum); |
9185ddce JB |
3703 | |
3704 | if (entry_or_exit == PR_SYSENTRY) | |
3705 | { | |
3706 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 3707 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
3708 | } |
3709 | else | |
3710 | { | |
3711 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 3712 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
3713 | } |
3714 | } | |
3715 | ||
c3f6f71d | 3716 | static void |
0b39b52e | 3717 | proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 3718 | { |
c3f6f71d | 3719 | procinfo *pi; |
c906108c | 3720 | |
dfd4cc63 | 3721 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 3722 | error (_("you must be debugging a process to use this command.")); |
c906108c | 3723 | |
c3f6f71d | 3724 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 3725 | error_no_arg (_("system call to trace")); |
c3f6f71d | 3726 | |
dfd4cc63 | 3727 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3728 | if (isdigit (args[0])) |
3729 | { | |
9185ddce | 3730 | const int syscallnum = atoi (args); |
c906108c | 3731 | |
9185ddce | 3732 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
3733 | } |
3734 | } | |
3735 | ||
19958708 | 3736 | static void |
0b39b52e | 3737 | proc_trace_sysentry_cmd (const char *args, int from_tty) |
c906108c | 3738 | { |
c3f6f71d JM |
3739 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
3740 | } | |
c906108c | 3741 | |
19958708 | 3742 | static void |
0b39b52e | 3743 | proc_trace_sysexit_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3744 | { |
3745 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 3746 | } |
c906108c | 3747 | |
19958708 | 3748 | static void |
0b39b52e | 3749 | proc_untrace_sysentry_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3750 | { |
3751 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
3752 | } | |
3753 | ||
19958708 | 3754 | static void |
0b39b52e | 3755 | proc_untrace_sysexit_cmd (const char *args, int from_tty) |
c906108c | 3756 | { |
c3f6f71d JM |
3757 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
3758 | } | |
c906108c | 3759 | |
c906108c | 3760 | void |
fba45db2 | 3761 | _initialize_procfs (void) |
c906108c | 3762 | { |
76727919 | 3763 | gdb::observers::inferior_created.attach (procfs_inferior_created); |
27087a3d | 3764 | |
19958708 | 3765 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 3766 | _("Give a trace of entries into the syscall.")); |
19958708 | 3767 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 3768 | _("Give a trace of exits from the syscall.")); |
19958708 | 3769 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 3770 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 3771 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 3772 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
3773 | } |
3774 | ||
3775 | /* =================== END, GDB "MODULE" =================== */ | |
3776 | ||
3777 | ||
3778 | ||
77382aee PA |
3779 | /* miscellaneous stubs: */ |
3780 | ||
3781 | /* The following satisfy a few random symbols mostly created by the | |
3782 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 3783 | |
77382aee PA |
3784 | /* Return a pid for which we guarantee we will be able to find a |
3785 | 'live' procinfo. */ | |
c3f6f71d | 3786 | |
39f77062 | 3787 | ptid_t |
fba45db2 | 3788 | procfs_first_available (void) |
c3f6f71d | 3789 | { |
39f77062 | 3790 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 3791 | } |
be4d1333 MS |
3792 | |
3793 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
3794 | ||
3795 | static char * | |
19958708 | 3796 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 3797 | char *note_data, int *note_size, |
2ea28649 | 3798 | enum gdb_signal stop_signal) |
be4d1333 | 3799 | { |
594f7785 | 3800 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
3801 | gdb_gregset_t gregs; |
3802 | gdb_fpregset_t fpregs; | |
3803 | unsigned long merged_pid; | |
3804 | ||
dfd4cc63 | 3805 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 3806 | |
75125405 DJ |
3807 | /* This part is the old method for fetching registers. |
3808 | It should be replaced by the newer one using regsets | |
3809 | once it is implemented in this platform: | |
29082443 | 3810 | gdbarch_iterate_over_regset_sections(). */ |
75125405 | 3811 | |
2989a365 | 3812 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
75125405 DJ |
3813 | inferior_ptid = ptid; |
3814 | target_fetch_registers (regcache, -1); | |
3815 | ||
594f7785 | 3816 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
3817 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
3818 | note_data, | |
3819 | note_size, | |
19958708 | 3820 | merged_pid, |
65554fef MS |
3821 | stop_signal, |
3822 | &gregs); | |
594f7785 | 3823 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
3824 | note_data = (char *) elfcore_write_prfpreg (obfd, |
3825 | note_data, | |
3826 | note_size, | |
3827 | &fpregs, | |
3828 | sizeof (fpregs)); | |
75125405 | 3829 | |
be4d1333 MS |
3830 | return note_data; |
3831 | } | |
3832 | ||
3833 | struct procfs_corefile_thread_data { | |
3834 | bfd *obfd; | |
3835 | char *note_data; | |
3836 | int *note_size; | |
2ea28649 | 3837 | enum gdb_signal stop_signal; |
be4d1333 MS |
3838 | }; |
3839 | ||
3840 | static int | |
65554fef | 3841 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 | 3842 | { |
b196bc4c RO |
3843 | struct procfs_corefile_thread_data *args |
3844 | = (struct procfs_corefile_thread_data *) data; | |
be4d1333 | 3845 | |
2689673f | 3846 | if (pi != NULL) |
be4d1333 | 3847 | { |
dfd4cc63 | 3848 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 3849 | |
75125405 | 3850 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 3851 | args->note_data, |
2020b7ab PA |
3852 | args->note_size, |
3853 | args->stop_signal); | |
be4d1333 MS |
3854 | } |
3855 | return 0; | |
3856 | } | |
3857 | ||
a223f1e7 JB |
3858 | static int |
3859 | find_signalled_thread (struct thread_info *info, void *data) | |
3860 | { | |
a493e3e2 | 3861 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
3862 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
3863 | return 1; | |
3864 | ||
3865 | return 0; | |
3866 | } | |
3867 | ||
2ea28649 | 3868 | static enum gdb_signal |
a223f1e7 JB |
3869 | find_stop_signal (void) |
3870 | { | |
3871 | struct thread_info *info = | |
3872 | iterate_over_threads (find_signalled_thread, NULL); | |
3873 | ||
3874 | if (info) | |
16c381f0 | 3875 | return info->suspend.stop_signal; |
a223f1e7 | 3876 | else |
a493e3e2 | 3877 | return GDB_SIGNAL_0; |
a223f1e7 JB |
3878 | } |
3879 | ||
be4d1333 | 3880 | static char * |
fc6691b2 | 3881 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 MS |
3882 | { |
3883 | struct cleanup *old_chain; | |
3884 | gdb_gregset_t gregs; | |
3885 | gdb_fpregset_t fpregs; | |
3886 | char fname[16] = {'\0'}; | |
3887 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 3888 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3889 | char *note_data = NULL; |
6dbdc4a3 | 3890 | char *inf_args; |
be4d1333 | 3891 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 3892 | gdb_byte *auxv; |
4e73f23d | 3893 | int auxv_len; |
2ea28649 | 3894 | enum gdb_signal stop_signal; |
be4d1333 MS |
3895 | |
3896 | if (get_exec_file (0)) | |
3897 | { | |
9f37bbcc | 3898 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
3899 | fname[sizeof (fname) - 1] = 0; |
3900 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
3901 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
3902 | |
3903 | inf_args = get_inferior_args (); | |
3904 | if (inf_args && *inf_args && | |
3905 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 3906 | { |
19958708 | 3907 | strncat (psargs, " ", |
be4d1333 | 3908 | sizeof (psargs) - strlen (psargs)); |
19958708 | 3909 | strncat (psargs, inf_args, |
be4d1333 MS |
3910 | sizeof (psargs) - strlen (psargs)); |
3911 | } | |
3912 | } | |
3913 | ||
19958708 RM |
3914 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
3915 | note_data, | |
3916 | note_size, | |
3917 | fname, | |
be4d1333 MS |
3918 | psargs); |
3919 | ||
651c8d2d PA |
3920 | stop_signal = find_stop_signal (); |
3921 | ||
3e3420f6 PA |
3922 | fill_gregset (get_current_regcache (), &gregs, -1); |
3923 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 3924 | ptid_get_pid (inferior_ptid), |
3e3420f6 | 3925 | stop_signal, &gregs); |
3e3420f6 | 3926 | |
be4d1333 MS |
3927 | thread_args.obfd = obfd; |
3928 | thread_args.note_data = note_data; | |
3929 | thread_args.note_size = note_size; | |
651c8d2d | 3930 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
3931 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
3932 | &thread_args); | |
2689673f | 3933 | note_data = thread_args.note_data; |
be4d1333 | 3934 | |
13547ab6 DJ |
3935 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
3936 | NULL, &auxv); | |
4e73f23d RM |
3937 | if (auxv_len > 0) |
3938 | { | |
3939 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
3940 | "CORE", NT_AUXV, auxv, auxv_len); | |
3941 | xfree (auxv); | |
3942 | } | |
3943 | ||
be4d1333 MS |
3944 | return note_data; |
3945 | } | |
be4d1333 | 3946 | /* =================== END GCORE .NOTE "MODULE" =================== */ |