Commit | Line | Data |
---|---|---|
44122162 | 1 | /* Machine independent support for Solaris /proc (process file system) for GDB. |
2555fe1a | 2 | |
42a4f53d | 3 | Copyright (C) 1999-2019 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" |
0747795c | 34 | #include "common/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> | |
0747795c | 41 | #include "common/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" |
30a7953d | 50 | #include "common/pathstuff.h" |
0fda6bd2 | 51 | |
77382aee PA |
52 | /* This module provides the interface between GDB and the |
53 | /proc file system, which is used on many versions of Unix | |
54 | as a means for debuggers to control other processes. | |
55 | ||
77382aee PA |
56 | /proc works by imitating a file system: you open a simulated file |
57 | that represents the process you wish to interact with, and perform | |
58 | operations on that "file" in order to examine or change the state | |
59 | of the other process. | |
60 | ||
61 | The most important thing to know about /proc and this module is | |
62 | that there are two very different interfaces to /proc: | |
63 | ||
64 | One that uses the ioctl system call, and another that uses read | |
65 | and write system calls. | |
66 | ||
44122162 RO |
67 | This module supports only the Solaris version of the read/write |
68 | interface. */ | |
77382aee | 69 | |
c906108c | 70 | #include <sys/types.h> |
2978b111 | 71 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
c906108c | 72 | |
c3f6f71d JM |
73 | #include <fcntl.h> /* for O_RDONLY */ |
74 | #include <unistd.h> /* for "X_OK" */ | |
53ce3c39 | 75 | #include <sys/stat.h> /* for struct stat */ |
c906108c | 76 | |
103b3ef5 MS |
77 | /* Note: procfs-utils.h must be included after the above system header |
78 | files, because it redefines various system calls using macros. | |
79 | This may be incompatible with the prototype declarations. */ | |
80 | ||
103b3ef5 MS |
81 | #include "proc-utils.h" |
82 | ||
77382aee | 83 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
84 | #include "gregset.h" |
85 | ||
c3f6f71d | 86 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 87 | |
77382aee | 88 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 89 | |
f6ac5f3d | 90 | |
e96027e0 PA |
91 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
92 | const gdb_byte *, | |
93 | ULONGEST, ULONGEST, | |
94 | ULONGEST *); | |
a14ed312 | 95 | |
f6ac5f3d PA |
96 | class procfs_target final : public inf_child_target |
97 | { | |
98 | public: | |
99 | void create_inferior (const char *, const std::string &, | |
100 | char **, int) override; | |
101 | ||
102 | void kill () override; | |
103 | ||
104 | void mourn_inferior () override; | |
105 | ||
106 | void attach (const char *, int) override; | |
107 | void detach (inferior *inf, int) override; | |
108 | ||
109 | void resume (ptid_t, int, enum gdb_signal) override; | |
110 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
111 | ||
112 | void fetch_registers (struct regcache *, int) override; | |
113 | void store_registers (struct regcache *, int) override; | |
114 | ||
115 | enum target_xfer_status xfer_partial (enum target_object object, | |
116 | const char *annex, | |
117 | gdb_byte *readbuf, | |
118 | const gdb_byte *writebuf, | |
119 | ULONGEST offset, ULONGEST len, | |
120 | ULONGEST *xfered_len) override; | |
121 | ||
adc6a863 | 122 | void pass_signals (gdb::array_view<const unsigned char>) override; |
a14ed312 | 123 | |
f6ac5f3d | 124 | void files_info () override; |
c3f6f71d | 125 | |
f6ac5f3d | 126 | void update_thread_list () override; |
be4d1333 | 127 | |
57810aa7 | 128 | bool thread_alive (ptid_t ptid) override; |
be4d1333 | 129 | |
a068643d | 130 | std::string pid_to_str (ptid_t) override; |
1e03ad20 | 131 | |
4206c05e RO |
132 | char *pid_to_exec_file (int pid) override; |
133 | ||
f6ac5f3d PA |
134 | thread_control_capabilities get_thread_control_capabilities () override |
135 | { return tc_schedlock; } | |
145b16a9 | 136 | |
f6ac5f3d PA |
137 | /* find_memory_regions support method for gcore */ |
138 | int find_memory_regions (find_memory_region_ftype func, void *data) | |
139 | override; | |
b5c8fcb1 | 140 | |
f6ac5f3d | 141 | char *make_corefile_notes (bfd *, int *) override; |
b5c8fcb1 | 142 | |
f6ac5f3d PA |
143 | bool info_proc (const char *, enum info_proc_what) override; |
144 | ||
c475f569 | 145 | #if PR_MODEL_NATIVE == PR_MODEL_LP64 |
f6ac5f3d PA |
146 | int auxv_parse (gdb_byte **readptr, |
147 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
148 | override; | |
149 | #endif | |
150 | ||
57810aa7 | 151 | bool stopped_by_watchpoint () override; |
f6ac5f3d PA |
152 | |
153 | int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
154 | struct expression *) override; | |
155 | ||
156 | int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
157 | struct expression *) override; | |
158 | ||
159 | int region_ok_for_hw_watchpoint (CORE_ADDR, int) override; | |
160 | ||
161 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
57810aa7 | 162 | bool stopped_data_address (CORE_ADDR *) override; |
f6ac5f3d | 163 | }; |
b5c8fcb1 | 164 | |
f6ac5f3d | 165 | static procfs_target the_procfs_target; |
b5c8fcb1 | 166 | |
c475f569 | 167 | #if PR_MODEL_NATIVE == PR_MODEL_LP64 |
77382aee PA |
168 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
169 | is presented in 64-bit format. We need to provide a custom parser | |
170 | to handle that. */ | |
f6ac5f3d PA |
171 | int |
172 | procfs_target::auxv_parse (gdb_byte **readptr, | |
173 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
c47ffbe3 | 174 | { |
f5656ead | 175 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
176 | gdb_byte *ptr = *readptr; |
177 | ||
178 | if (endptr == ptr) | |
179 | return 0; | |
77382aee | 180 | |
c47ffbe3 VP |
181 | if (endptr - ptr < 8 * 2) |
182 | return -1; | |
183 | ||
e17a4113 | 184 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
185 | ptr += 8; |
186 | /* The size of data is always 64-bit. If the application is 32-bit, | |
187 | it will be zero extended, as expected. */ | |
e17a4113 | 188 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
189 | ptr += 8; |
190 | ||
191 | *readptr = ptr; | |
192 | return 1; | |
193 | } | |
194 | #endif | |
195 | ||
c3f6f71d JM |
196 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
197 | ||
77382aee PA |
198 | /* World Unification: |
199 | ||
200 | Put any typedefs, defines etc. here that are required for the | |
201 | unification of code that handles different versions of /proc. */ | |
c3f6f71d | 202 | |
44122162 RO |
203 | enum { READ_WATCHFLAG = WA_READ, |
204 | WRITE_WATCHFLAG = WA_WRITE, | |
205 | EXEC_WATCHFLAG = WA_EXEC, | |
206 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
207 | }; | |
c3f6f71d JM |
208 | |
209 | ||
210 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
211 | ||
212 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
213 | ||
214 | /* The procinfo struct is a wrapper to hold all the state information | |
215 | concerning a /proc process. There should be exactly one procinfo | |
216 | for each process, and since GDB currently can debug only one | |
217 | process at a time, that means there should be only one procinfo. | |
218 | All of the LWP's of a process can be accessed indirectly thru the | |
219 | single process procinfo. | |
220 | ||
221 | However, against the day when GDB may debug more than one process, | |
222 | this data structure is kept in a list (which for now will hold no | |
223 | more than one member), and many functions will have a pointer to a | |
224 | procinfo as an argument. | |
225 | ||
226 | There will be a separate procinfo structure for use by the (not yet | |
227 | implemented) "info proc" command, so that we can print useful | |
228 | information about any random process without interfering with the | |
0df8b418 | 229 | inferior's procinfo information. */ |
c3f6f71d | 230 | |
c3f6f71d | 231 | /* format strings for /proc paths */ |
44122162 RO |
232 | #define MAIN_PROC_NAME_FMT "/proc/%d" |
233 | #define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
234 | #define AS_PROC_NAME_FMT "/proc/%d/as" | |
235 | #define MAP_PROC_NAME_FMT "/proc/%d/map" | |
236 | #define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
13db92d3 | 237 | #define MAX_PROC_NAME_SIZE sizeof("/proc/999999/lwp/0123456789/lwpstatus") |
c906108c | 238 | |
c3f6f71d JM |
239 | typedef struct procinfo { |
240 | struct procinfo *next; | |
241 | int pid; /* Process ID */ | |
242 | int tid; /* Thread/LWP id */ | |
c906108c | 243 | |
c3f6f71d JM |
244 | /* process state */ |
245 | int was_stopped; | |
246 | int ignore_next_sigstop; | |
c906108c | 247 | |
c3f6f71d | 248 | int ctl_fd; /* File descriptor for /proc control file */ |
c3f6f71d JM |
249 | int status_fd; /* File descriptor for /proc status file */ |
250 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 251 | |
c3f6f71d | 252 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 253 | |
c3f6f71d | 254 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
44122162 RO |
255 | sigset_t saved_sigset; /* Saved traced signal set */ |
256 | sigset_t saved_sighold; /* Saved held signal set */ | |
37de36c6 KB |
257 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
258 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 259 | |
44122162 | 260 | pstatus_t prstatus; /* Current process status info */ |
19958708 | 261 | |
c3f6f71d | 262 | struct procinfo *thread_list; |
c906108c | 263 | |
c3f6f71d JM |
264 | int status_valid : 1; |
265 | int gregs_valid : 1; | |
266 | int fpregs_valid : 1; | |
267 | int threads_valid: 1; | |
268 | } procinfo; | |
c906108c | 269 | |
c3f6f71d | 270 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 271 | |
c3f6f71d | 272 | /* Function prototypes for procinfo module: */ |
c906108c | 273 | |
a14ed312 KB |
274 | static procinfo *find_procinfo_or_die (int pid, int tid); |
275 | static procinfo *find_procinfo (int pid, int tid); | |
276 | static procinfo *create_procinfo (int pid, int tid); | |
44122162 | 277 | static void destroy_procinfo (procinfo *p); |
44122162 RO |
278 | static void dead_procinfo (procinfo *p, const char *msg, int killp); |
279 | static int open_procinfo_files (procinfo *p, int which); | |
280 | static void close_procinfo_files (procinfo *p); | |
c906108c | 281 | |
e9ef4f39 | 282 | static int iterate_over_mappings |
b8edc417 JK |
283 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
284 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 285 | void *data)); |
e9ef4f39 | 286 | |
c3f6f71d | 287 | /* The head of the procinfo list: */ |
44122162 | 288 | static procinfo *procinfo_list; |
c906108c | 289 | |
77382aee PA |
290 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
291 | not found. */ | |
c906108c | 292 | |
19958708 | 293 | static procinfo * |
fba45db2 | 294 | find_procinfo (int pid, int tid) |
c5aa993b | 295 | { |
c3f6f71d | 296 | procinfo *pi; |
c906108c | 297 | |
c3f6f71d JM |
298 | for (pi = procinfo_list; pi; pi = pi->next) |
299 | if (pi->pid == pid) | |
300 | break; | |
c906108c | 301 | |
c3f6f71d JM |
302 | if (pi) |
303 | if (tid) | |
304 | { | |
305 | /* Don't check threads_valid. If we're updating the | |
306 | thread_list, we want to find whatever threads are already | |
307 | here. This means that in general it is the caller's | |
308 | responsibility to check threads_valid and update before | |
309 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 310 | thread. */ |
c3f6f71d JM |
311 | |
312 | for (pi = pi->thread_list; pi; pi = pi->next) | |
313 | if (pi->tid == tid) | |
314 | break; | |
315 | } | |
c906108c | 316 | |
c3f6f71d JM |
317 | return pi; |
318 | } | |
c906108c | 319 | |
77382aee | 320 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 321 | |
c3f6f71d | 322 | static procinfo * |
fba45db2 | 323 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
324 | { |
325 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 326 | |
c3f6f71d | 327 | if (pi == NULL) |
0fda6bd2 JM |
328 | { |
329 | if (tid) | |
3e43a32a MS |
330 | error (_("procfs: couldn't find pid %d " |
331 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
332 | pid, tid); |
333 | else | |
8a3fe4f8 | 334 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 335 | } |
c3f6f71d JM |
336 | return pi; |
337 | } | |
c906108c | 338 | |
77382aee PA |
339 | /* Wrapper for `open'. The appropriate open call is attempted; if |
340 | unsuccessful, it will be retried as many times as needed for the | |
341 | EAGAIN and EINTR conditions. | |
19958708 | 342 | |
77382aee PA |
343 | For other conditions, retry the open a limited number of times. In |
344 | addition, a short sleep is imposed prior to retrying the open. The | |
345 | reason for this sleep is to give the kernel a chance to catch up | |
346 | and create the file in question in the event that GDB "wins" the | |
347 | race to open a file before the kernel has created it. */ | |
19958708 | 348 | |
4d1bcd09 KB |
349 | static int |
350 | open_with_retry (const char *pathname, int flags) | |
351 | { | |
352 | int retries_remaining, status; | |
353 | ||
354 | retries_remaining = 2; | |
355 | ||
356 | while (1) | |
357 | { | |
358 | status = open (pathname, flags); | |
359 | ||
360 | if (status >= 0 || retries_remaining == 0) | |
361 | break; | |
362 | else if (errno != EINTR && errno != EAGAIN) | |
363 | { | |
364 | retries_remaining--; | |
365 | sleep (1); | |
366 | } | |
367 | } | |
368 | ||
369 | return status; | |
370 | } | |
371 | ||
44122162 RO |
372 | /* Open the file descriptor for the process or LWP. We only open the |
373 | control file descriptor; the others are opened lazily as needed. | |
77382aee | 374 | Returns the file descriptor, or zero for failure. */ |
c906108c | 375 | |
c3f6f71d | 376 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 377 | |
c3f6f71d | 378 | static int |
fba45db2 | 379 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d JM |
380 | { |
381 | char tmp[MAX_PROC_NAME_SIZE]; | |
382 | int fd; | |
383 | ||
77382aee PA |
384 | /* This function is getting ALMOST long enough to break up into |
385 | several. Here is some rationale: | |
386 | ||
77382aee PA |
387 | There are several file descriptors that may need to be open |
388 | for any given process or LWP. The ones we're intereted in are: | |
389 | - control (ctl) write-only change the state | |
390 | - status (status) read-only query the state | |
391 | - address space (as) read/write access memory | |
392 | - map (map) read-only virtual addr map | |
393 | Most of these are opened lazily as they are needed. | |
394 | The pathnames for the 'files' for an LWP look slightly | |
395 | different from those of a first-class process: | |
396 | Pathnames for a process (<proc-id>): | |
397 | /proc/<proc-id>/ctl | |
398 | /proc/<proc-id>/status | |
399 | /proc/<proc-id>/as | |
400 | /proc/<proc-id>/map | |
401 | Pathnames for an LWP (lwp-id): | |
402 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
403 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
404 | An LWP has no map or address space file descriptor, since | |
44122162 RO |
405 | the memory map and address space are shared by all LWPs. */ |
406 | ||
77382aee PA |
407 | /* In this case, there are several different file descriptors that |
408 | we might be asked to open. The control file descriptor will be | |
409 | opened early, but the others will be opened lazily as they are | |
410 | needed. */ | |
c3f6f71d JM |
411 | |
412 | strcpy (tmp, pi->pathname); | |
0df8b418 | 413 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
414 | case FD_CTL: |
415 | if (pi->tid) | |
416 | strcat (tmp, "/lwpctl"); | |
417 | else | |
418 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 419 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 420 | if (fd < 0) |
c3f6f71d JM |
421 | return 0; /* fail */ |
422 | pi->ctl_fd = fd; | |
423 | break; | |
424 | case FD_AS: | |
425 | if (pi->tid) | |
0df8b418 | 426 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 427 | strcat (tmp, "/as"); |
4d1bcd09 | 428 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 429 | if (fd < 0) |
c3f6f71d JM |
430 | return 0; /* fail */ |
431 | pi->as_fd = fd; | |
432 | break; | |
433 | case FD_STATUS: | |
434 | if (pi->tid) | |
435 | strcat (tmp, "/lwpstatus"); | |
436 | else | |
437 | strcat (tmp, "/status"); | |
4d1bcd09 | 438 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 439 | if (fd < 0) |
c3f6f71d JM |
440 | return 0; /* fail */ |
441 | pi->status_fd = fd; | |
442 | break; | |
443 | default: | |
444 | return 0; /* unknown file descriptor */ | |
445 | } | |
c906108c | 446 | |
c3f6f71d JM |
447 | return 1; /* success */ |
448 | } | |
c906108c | 449 | |
77382aee PA |
450 | /* Allocate a data structure and link it into the procinfo list. |
451 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
452 | pointer to new procinfo struct. */ | |
c906108c | 453 | |
c3f6f71d | 454 | static procinfo * |
fba45db2 | 455 | create_procinfo (int pid, int tid) |
c3f6f71d | 456 | { |
0b62613e | 457 | procinfo *pi, *parent = NULL; |
c906108c | 458 | |
c475f569 RO |
459 | pi = find_procinfo (pid, tid); |
460 | if (pi != NULL) | |
0df8b418 | 461 | return pi; /* Already exists, nothing to do. */ |
c906108c | 462 | |
0df8b418 | 463 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
464 | if (tid != 0) |
465 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
466 | create it if it | |
0df8b418 | 467 | doesn't exist yet? */ |
c906108c | 468 | |
8d749320 | 469 | pi = XNEW (procinfo); |
c3f6f71d JM |
470 | memset (pi, 0, sizeof (procinfo)); |
471 | pi->pid = pid; | |
472 | pi->tid = tid; | |
c906108c | 473 | |
c475f569 RO |
474 | pi->saved_entryset = XNEW (sysset_t); |
475 | pi->saved_exitset = XNEW (sysset_t); | |
1d5e0602 | 476 | |
c3f6f71d JM |
477 | /* Chain into list. */ |
478 | if (tid == 0) | |
479 | { | |
c475f569 | 480 | xsnprintf (pi->pathname, sizeof (pi->pathname), MAIN_PROC_NAME_FMT, pid); |
c3f6f71d JM |
481 | pi->next = procinfo_list; |
482 | procinfo_list = pi; | |
483 | } | |
484 | else | |
485 | { | |
c475f569 RO |
486 | xsnprintf (pi->pathname, sizeof (pi->pathname), "/proc/%d/lwp/%d", |
487 | pid, tid); | |
c3f6f71d JM |
488 | pi->next = parent->thread_list; |
489 | parent->thread_list = pi; | |
490 | } | |
491 | return pi; | |
492 | } | |
c906108c | 493 | |
77382aee | 494 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 495 | |
c3f6f71d | 496 | static void |
fba45db2 | 497 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
498 | { |
499 | if (pi->ctl_fd > 0) | |
500 | close (pi->ctl_fd); | |
c3f6f71d JM |
501 | if (pi->as_fd > 0) |
502 | close (pi->as_fd); | |
503 | if (pi->status_fd > 0) | |
504 | close (pi->status_fd); | |
c3f6f71d JM |
505 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
506 | } | |
c906108c | 507 | |
77382aee | 508 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 509 | |
c3f6f71d | 510 | static void |
fba45db2 | 511 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
512 | { |
513 | procinfo *ptr; | |
514 | ||
77382aee | 515 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
516 | if (pi == *list) |
517 | *list = pi->next; | |
19958708 | 518 | else |
c3f6f71d JM |
519 | for (ptr = *list; ptr; ptr = ptr->next) |
520 | if (ptr->next == pi) | |
521 | { | |
522 | ptr->next = pi->next; | |
523 | break; | |
524 | } | |
7a292a7a | 525 | |
77382aee | 526 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 527 | close_procinfo_files (pi); |
7a292a7a | 528 | |
77382aee | 529 | /* Step three: free the memory. */ |
1d5e0602 KB |
530 | xfree (pi->saved_entryset); |
531 | xfree (pi->saved_exitset); | |
b8c9b27d | 532 | xfree (pi); |
c3f6f71d | 533 | } |
c906108c | 534 | |
c3f6f71d | 535 | static void |
fba45db2 | 536 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
537 | { |
538 | procinfo *tmp; | |
c906108c | 539 | |
0df8b418 | 540 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 541 | { |
0df8b418 | 542 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
543 | destroy_one_procinfo (&tmp->thread_list, pi); |
544 | } | |
0df8b418 | 545 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
546 | { |
547 | /* First destroy the children, if any; */ | |
548 | while (pi->thread_list != NULL) | |
549 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
550 | /* Then destroy the parent. Genocide!!! */ | |
551 | destroy_one_procinfo (&procinfo_list, pi); | |
552 | } | |
553 | } | |
c906108c | 554 | |
5b4cbbe3 TT |
555 | /* A deleter that calls destroy_procinfo. */ |
556 | struct procinfo_deleter | |
004527cb | 557 | { |
5b4cbbe3 TT |
558 | void operator() (procinfo *pi) const |
559 | { | |
560 | destroy_procinfo (pi); | |
561 | } | |
562 | }; | |
563 | ||
564 | typedef std::unique_ptr<procinfo, procinfo_deleter> procinfo_up; | |
004527cb | 565 | |
c3f6f71d | 566 | enum { NOKILL, KILL }; |
c906108c | 567 | |
77382aee PA |
568 | /* To be called on a non_recoverable error for a procinfo. Prints |
569 | error messages, optionally sends a SIGKILL to the process, then | |
570 | destroys the data structure. */ | |
c906108c | 571 | |
c3f6f71d | 572 | static void |
995816ba | 573 | dead_procinfo (procinfo *pi, const char *msg, int kill_p) |
c3f6f71d JM |
574 | { |
575 | char procfile[80]; | |
c906108c | 576 | |
c3f6f71d | 577 | if (pi->pathname) |
c475f569 | 578 | print_sys_errmsg (pi->pathname, errno); |
c3f6f71d JM |
579 | else |
580 | { | |
c475f569 | 581 | xsnprintf (procfile, sizeof (procfile), "process %d", pi->pid); |
c3f6f71d JM |
582 | print_sys_errmsg (procfile, errno); |
583 | } | |
584 | if (kill_p == KILL) | |
585 | kill (pi->pid, SIGKILL); | |
c906108c | 586 | |
c3f6f71d | 587 | destroy_procinfo (pi); |
0b62613e | 588 | error ("%s", msg); |
c3f6f71d | 589 | } |
c906108c | 590 | |
c3f6f71d | 591 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 592 | |
c3f6f71d | 593 | /* =================== /proc "MODULE" =================== */ |
c906108c | 594 | |
77382aee PA |
595 | /* This "module" is the interface layer between the /proc system API |
596 | and the gdb target vector functions. This layer consists of access | |
597 | functions that encapsulate each of the basic operations that we | |
598 | need to use from the /proc API. | |
599 | ||
600 | The main motivation for this layer is to hide the fact that there | |
601 | are two very different implementations of the /proc API. Rather | |
602 | than have a bunch of #ifdefs all thru the gdb target vector | |
603 | functions, we do our best to hide them all in here. */ | |
c906108c | 604 | |
44122162 RO |
605 | static long proc_flags (procinfo *pi); |
606 | static int proc_why (procinfo *pi); | |
607 | static int proc_what (procinfo *pi); | |
608 | static int proc_set_current_signal (procinfo *pi, int signo); | |
609 | static int proc_get_current_thread (procinfo *pi); | |
d3581e61 | 610 | static int proc_iterate_over_threads |
44122162 | 611 | (procinfo *pi, |
d3581e61 JB |
612 | int (*func) (procinfo *, procinfo *, void *), |
613 | void *ptr); | |
614 | ||
615 | static void | |
995816ba | 616 | proc_warn (procinfo *pi, const char *func, int line) |
c3f6f71d | 617 | { |
c475f569 RO |
618 | xsnprintf (errmsg, sizeof (errmsg), "procfs: %s line %d, %s", |
619 | func, line, pi->pathname); | |
c3f6f71d JM |
620 | print_sys_errmsg (errmsg, errno); |
621 | } | |
c906108c | 622 | |
d3581e61 | 623 | static void |
995816ba | 624 | proc_error (procinfo *pi, const char *func, int line) |
c3f6f71d | 625 | { |
c475f569 RO |
626 | xsnprintf (errmsg, sizeof (errmsg), "procfs: %s line %d, %s", |
627 | func, line, pi->pathname); | |
c3f6f71d JM |
628 | perror_with_name (errmsg); |
629 | } | |
c906108c | 630 | |
77382aee PA |
631 | /* Updates the status struct in the procinfo. There is a 'valid' |
632 | flag, to let other functions know when this function needs to be | |
633 | called (so the status is only read when it is needed). The status | |
634 | file descriptor is also only opened when it is needed. Returns | |
635 | non-zero for success, zero for failure. */ | |
c906108c | 636 | |
d3581e61 | 637 | static int |
fba45db2 | 638 | proc_get_status (procinfo *pi) |
c3f6f71d | 639 | { |
0df8b418 | 640 | /* Status file descriptor is opened "lazily". */ |
c475f569 | 641 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) |
c3f6f71d JM |
642 | { |
643 | pi->status_valid = 0; | |
644 | return 0; | |
645 | } | |
c906108c | 646 | |
c3f6f71d JM |
647 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
648 | pi->status_valid = 0; /* fail */ | |
649 | else | |
650 | { | |
19958708 | 651 | /* Sigh... I have to read a different data structure, |
0df8b418 | 652 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 653 | if (pi->tid) |
19958708 RM |
654 | pi->status_valid = (read (pi->status_fd, |
655 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
656 | sizeof (lwpstatus_t)) |
657 | == sizeof (lwpstatus_t)); | |
658 | else | |
659 | { | |
19958708 | 660 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d | 661 | (char *) &pi->prstatus, |
44122162 RO |
662 | sizeof (pstatus_t)) |
663 | == sizeof (pstatus_t)); | |
c3f6f71d JM |
664 | } |
665 | } | |
c906108c | 666 | |
c3f6f71d JM |
667 | if (pi->status_valid) |
668 | { | |
19958708 | 669 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 670 | proc_why (pi), |
19958708 | 671 | proc_what (pi), |
c3f6f71d JM |
672 | proc_get_current_thread (pi)); |
673 | } | |
c906108c | 674 | |
77382aee | 675 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d | 676 | pi->gregs_valid = pi->status_valid; |
77382aee PA |
677 | /* In the read/write multiple-fd model, the status struct includes |
678 | the fp regs too, so mark them valid too. */ | |
c3f6f71d | 679 | pi->fpregs_valid = pi->status_valid; |
77382aee | 680 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 681 | } |
c906108c | 682 | |
77382aee | 683 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 684 | |
d3581e61 | 685 | static long |
fba45db2 | 686 | proc_flags (procinfo *pi) |
c3f6f71d JM |
687 | { |
688 | if (!pi->status_valid) | |
689 | if (!proc_get_status (pi)) | |
0df8b418 | 690 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 691 | |
c3f6f71d | 692 | return pi->prstatus.pr_lwp.pr_flags; |
c3f6f71d | 693 | } |
c906108c | 694 | |
77382aee | 695 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 696 | |
d3581e61 | 697 | static int |
fba45db2 | 698 | proc_why (procinfo *pi) |
c3f6f71d JM |
699 | { |
700 | if (!pi->status_valid) | |
701 | if (!proc_get_status (pi)) | |
0df8b418 | 702 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 703 | |
c3f6f71d | 704 | return pi->prstatus.pr_lwp.pr_why; |
c3f6f71d | 705 | } |
c906108c | 706 | |
77382aee | 707 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 708 | |
d3581e61 | 709 | static int |
fba45db2 | 710 | proc_what (procinfo *pi) |
c3f6f71d JM |
711 | { |
712 | if (!pi->status_valid) | |
713 | if (!proc_get_status (pi)) | |
0df8b418 | 714 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 715 | |
c3f6f71d | 716 | return pi->prstatus.pr_lwp.pr_what; |
c3f6f71d | 717 | } |
c906108c | 718 | |
77382aee PA |
719 | /* This function is only called when PI is stopped by a watchpoint. |
720 | Assuming the OS supports it, write to *ADDR the data address which | |
721 | triggered it and return 1. Return 0 if it is not possible to know | |
722 | the address. */ | |
bf701c2c PM |
723 | |
724 | static int | |
725 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
726 | { | |
727 | if (!pi->status_valid) | |
728 | if (!proc_get_status (pi)) | |
729 | return 0; | |
730 | ||
f5656ead TT |
731 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
732 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c | 733 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
bf701c2c PM |
734 | return 1; |
735 | } | |
736 | ||
77382aee PA |
737 | /* Returns the pr_nsysarg field (number of args to the current |
738 | syscall). */ | |
c3f6f71d | 739 | |
d3581e61 | 740 | static int |
fba45db2 | 741 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
742 | { |
743 | if (!pi->status_valid) | |
744 | if (!proc_get_status (pi)) | |
745 | return 0; | |
19958708 | 746 | |
c3f6f71d | 747 | return pi->prstatus.pr_lwp.pr_nsysarg; |
c3f6f71d | 748 | } |
c906108c | 749 | |
77382aee PA |
750 | /* Returns the pr_sysarg field (pointer to the arguments of current |
751 | syscall). */ | |
c906108c | 752 | |
d3581e61 | 753 | static long * |
fba45db2 | 754 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
755 | { |
756 | if (!pi->status_valid) | |
757 | if (!proc_get_status (pi)) | |
758 | return NULL; | |
19958708 | 759 | |
c3f6f71d | 760 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
c3f6f71d | 761 | } |
77382aee | 762 | |
44122162 | 763 | /* Set or reset any of the following process flags: |
77382aee PA |
764 | PR_FORK -- forked child will inherit trace flags |
765 | PR_RLC -- traced process runs when last /proc file closed. | |
766 | PR_KLC -- traced process is killed when last /proc file closed. | |
767 | PR_ASYNC -- LWP's get to run/stop independently. | |
768 | ||
44122162 | 769 | This function is done using read/write [PCSET/PCRESET/PCUNSET]. |
77382aee PA |
770 | |
771 | Arguments: | |
772 | pi -- the procinfo | |
773 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
774 | mode -- 1 for set, 0 for reset. | |
775 | ||
776 | Returns non-zero for success, zero for failure. */ | |
c906108c | 777 | |
c3f6f71d | 778 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 779 | |
c3f6f71d | 780 | static int |
fba45db2 | 781 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
782 | { |
783 | long win = 0; /* default to fail */ | |
784 | ||
77382aee PA |
785 | /* These operations affect the process as a whole, and applying them |
786 | to an individual LWP has the same meaning as applying them to the | |
787 | main process. Therefore, if we're ever called with a pointer to | |
788 | an LWP's procinfo, let's substitute the process's procinfo and | |
789 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
790 | |
791 | if (pi->pid != 0) | |
792 | pi = find_procinfo_or_die (pi->pid, 0); | |
793 | ||
44122162 | 794 | procfs_ctl_t arg[2]; |
c5aa993b | 795 | |
44122162 RO |
796 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
797 | arg[0] = PCSET; | |
0df8b418 | 798 | else /* Reset the flag. */ |
44122162 RO |
799 | arg[0] = PCUNSET; |
800 | ||
801 | arg[1] = flag; | |
802 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 803 | |
77382aee PA |
804 | /* The above operation renders the procinfo's cached pstatus |
805 | obsolete. */ | |
c3f6f71d | 806 | pi->status_valid = 0; |
c906108c | 807 | |
c3f6f71d | 808 | if (!win) |
8a3fe4f8 | 809 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
810 | flag == PR_FORK ? "PR_FORK" : |
811 | flag == PR_RLC ? "PR_RLC" : | |
c3f6f71d | 812 | flag == PR_ASYNC ? "PR_ASYNC" : |
0d06e24b | 813 | flag == PR_KLC ? "PR_KLC" : |
c3f6f71d JM |
814 | "<unknown flag>", |
815 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 816 | |
c3f6f71d JM |
817 | return win; |
818 | } | |
c906108c | 819 | |
77382aee PA |
820 | /* Set the run_on_last_close flag. Process with all threads will |
821 | become runnable when debugger closes all /proc fds. Returns | |
822 | non-zero for success, zero for failure. */ | |
c906108c | 823 | |
d3581e61 | 824 | static int |
fba45db2 | 825 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 826 | { |
c3f6f71d JM |
827 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
828 | } | |
c906108c | 829 | |
77382aee PA |
830 | /* Reset the run_on_last_close flag. The process will NOT become |
831 | runnable when debugger closes its file handles. Returns non-zero | |
832 | for success, zero for failure. */ | |
c906108c | 833 | |
d3581e61 | 834 | static int |
fba45db2 | 835 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
836 | { |
837 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
838 | } |
839 | ||
77382aee PA |
840 | /* Reset inherit_on_fork flag. If the process forks a child while we |
841 | are registered for events in the parent, then we will NOT recieve | |
842 | events from the child. Returns non-zero for success, zero for | |
843 | failure. */ | |
c906108c | 844 | |
d3581e61 | 845 | static int |
fba45db2 | 846 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
847 | { |
848 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
849 | } | |
c906108c | 850 | |
77382aee PA |
851 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
852 | (signal etc.), the remaining LWPs will continue to run. Returns | |
853 | non-zero for success, zero for failure. */ | |
c906108c | 854 | |
d3581e61 | 855 | static int |
fba45db2 | 856 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
857 | { |
858 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
859 | } | |
c906108c | 860 | |
77382aee PA |
861 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
862 | (signal etc.), then all other LWPs will stop as well. Returns | |
863 | non-zero for success, zero for failure. */ | |
c906108c | 864 | |
d3581e61 | 865 | static int |
fba45db2 | 866 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
867 | { |
868 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
869 | } | |
c906108c | 870 | |
77382aee PA |
871 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
872 | for success, zero for failure. */ | |
c906108c | 873 | |
d3581e61 | 874 | static int |
fba45db2 | 875 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
876 | { |
877 | int win; | |
c906108c | 878 | |
77382aee PA |
879 | /* We might conceivably apply this operation to an LWP, and the |
880 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 881 | |
c475f569 | 882 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c3f6f71d JM |
883 | return 0; |
884 | else | |
885 | { | |
37de36c6 | 886 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 887 | |
c3f6f71d | 888 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d | 889 | } |
c906108c | 890 | |
c3f6f71d JM |
891 | return win; |
892 | } | |
c5aa993b | 893 | |
77382aee PA |
894 | /* Wait for the process or LWP to stop (block until it does). Returns |
895 | non-zero for success, zero for failure. */ | |
c906108c | 896 | |
d3581e61 | 897 | static int |
fba45db2 | 898 | proc_wait_for_stop (procinfo *pi) |
c906108c | 899 | { |
c3f6f71d JM |
900 | int win; |
901 | ||
77382aee PA |
902 | /* We should never have to apply this operation to any procinfo |
903 | except the one for the main process. If that ever changes for | |
904 | any reason, then take out the following clause and replace it | |
905 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 906 | |
c3f6f71d JM |
907 | if (pi->tid != 0) |
908 | pi = find_procinfo_or_die (pi->pid, 0); | |
909 | ||
44122162 | 910 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 911 | |
92137da0 RO |
912 | set_sigint_trap (); |
913 | ||
44122162 | 914 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
92137da0 RO |
915 | |
916 | clear_sigint_trap (); | |
917 | ||
44122162 RO |
918 | /* We been runnin' and we stopped -- need to update status. */ |
919 | pi->status_valid = 0; | |
c906108c | 920 | |
c3f6f71d | 921 | return win; |
c906108c SS |
922 | } |
923 | ||
77382aee PA |
924 | /* Make the process or LWP runnable. |
925 | ||
926 | Options (not all are implemented): | |
927 | - single-step | |
928 | - clear current fault | |
929 | - clear current signal | |
930 | - abort the current system call | |
931 | - stop as soon as finished with system call | |
932 | - (ioctl): set traced signal set | |
933 | - (ioctl): set held signal set | |
934 | - (ioctl): set traced fault set | |
935 | - (ioctl): set start pc (vaddr) | |
936 | ||
937 | Always clears the current fault. PI is the process or LWP to | |
938 | operate on. If STEP is true, set the process or LWP to trap after | |
939 | one instruction. If SIGNO is zero, clear the current signal if | |
940 | any; if non-zero, set the current signal to this one. Returns | |
941 | non-zero for success, zero for failure. */ | |
c3f6f71d | 942 | |
d3581e61 | 943 | static int |
fba45db2 | 944 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
945 | { |
946 | int win; | |
947 | int runflags; | |
948 | ||
77382aee PA |
949 | /* We will probably have to apply this operation to individual |
950 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 951 | |
c475f569 RO |
952 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
953 | return 0; | |
c906108c | 954 | |
0df8b418 | 955 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
956 | if (step) |
957 | runflags |= PRSTEP; | |
958 | if (signo == 0) | |
959 | runflags |= PRCSIG; | |
0df8b418 | 960 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 961 | proc_set_current_signal (pi, signo); |
c5aa993b | 962 | |
44122162 | 963 | procfs_ctl_t cmd[2]; |
c906108c | 964 | |
44122162 RO |
965 | cmd[0] = PCRUN; |
966 | cmd[1] = runflags; | |
967 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c906108c | 968 | |
c3f6f71d JM |
969 | return win; |
970 | } | |
c906108c | 971 | |
77382aee PA |
972 | /* Register to trace signals in the process or LWP. Returns non-zero |
973 | for success, zero for failure. */ | |
c906108c | 974 | |
d3581e61 | 975 | static int |
44122162 | 976 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 977 | { |
c3f6f71d JM |
978 | int win; |
979 | ||
77382aee PA |
980 | /* We should never have to apply this operation to any procinfo |
981 | except the one for the main process. If that ever changes for | |
982 | any reason, then take out the following clause and replace it | |
983 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 984 | |
c3f6f71d JM |
985 | if (pi->tid != 0) |
986 | pi = find_procinfo_or_die (pi->pid, 0); | |
987 | ||
44122162 RO |
988 | struct { |
989 | procfs_ctl_t cmd; | |
990 | /* Use char array to avoid alignment issues. */ | |
991 | char sigset[sizeof (sigset_t)]; | |
992 | } arg; | |
c906108c | 993 | |
44122162 RO |
994 | arg.cmd = PCSTRACE; |
995 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
996 | ||
997 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 998 | |
0df8b418 | 999 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1000 | pi->status_valid = 0; |
c906108c | 1001 | |
c3f6f71d | 1002 | if (!win) |
8a3fe4f8 | 1003 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1004 | return win; |
c906108c SS |
1005 | } |
1006 | ||
77382aee PA |
1007 | /* Register to trace hardware faults in the process or LWP. Returns |
1008 | non-zero for success, zero for failure. */ | |
c906108c | 1009 | |
d3581e61 | 1010 | static int |
fba45db2 | 1011 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1012 | { |
1013 | int win; | |
1014 | ||
77382aee PA |
1015 | /* We should never have to apply this operation to any procinfo |
1016 | except the one for the main process. If that ever changes for | |
1017 | any reason, then take out the following clause and replace it | |
1018 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1019 | |
c3f6f71d JM |
1020 | if (pi->tid != 0) |
1021 | pi = find_procinfo_or_die (pi->pid, 0); | |
1022 | ||
44122162 RO |
1023 | struct { |
1024 | procfs_ctl_t cmd; | |
1025 | /* Use char array to avoid alignment issues. */ | |
1026 | char fltset[sizeof (fltset_t)]; | |
1027 | } arg; | |
1028 | ||
1029 | arg.cmd = PCSFAULT; | |
1030 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1031 | |
44122162 | 1032 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
c906108c | 1033 | |
0df8b418 | 1034 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1035 | pi->status_valid = 0; |
c906108c | 1036 | |
c3f6f71d JM |
1037 | return win; |
1038 | } | |
c5aa993b | 1039 | |
77382aee PA |
1040 | /* Register to trace entry to system calls in the process or LWP. |
1041 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1042 | |
d3581e61 | 1043 | static int |
fba45db2 | 1044 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1045 | { |
c3f6f71d JM |
1046 | int win; |
1047 | ||
77382aee PA |
1048 | /* We should never have to apply this operation to any procinfo |
1049 | except the one for the main process. If that ever changes for | |
1050 | any reason, then take out the following clause and replace it | |
1051 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1052 | |
c3f6f71d JM |
1053 | if (pi->tid != 0) |
1054 | pi = find_procinfo_or_die (pi->pid, 0); | |
1055 | ||
c475f569 | 1056 | struct { |
44122162 RO |
1057 | procfs_ctl_t cmd; |
1058 | /* Use char array to avoid alignment issues. */ | |
1059 | char sysset[sizeof (sysset_t)]; | |
c475f569 | 1060 | } arg; |
c3f6f71d | 1061 | |
c475f569 RO |
1062 | arg.cmd = PCSENTRY; |
1063 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
44122162 | 1064 | |
c475f569 | 1065 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
37de36c6 | 1066 | |
77382aee PA |
1067 | /* The above operation renders the procinfo's cached pstatus |
1068 | obsolete. */ | |
c3f6f71d | 1069 | pi->status_valid = 0; |
19958708 | 1070 | |
c3f6f71d | 1071 | return win; |
c906108c SS |
1072 | } |
1073 | ||
77382aee PA |
1074 | /* Register to trace exit from system calls in the process or LWP. |
1075 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1076 | |
d3581e61 | 1077 | static int |
fba45db2 | 1078 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1079 | { |
1080 | int win; | |
1081 | ||
77382aee PA |
1082 | /* We should never have to apply this operation to any procinfo |
1083 | except the one for the main process. If that ever changes for | |
1084 | any reason, then take out the following clause and replace it | |
1085 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1086 | |
c3f6f71d JM |
1087 | if (pi->tid != 0) |
1088 | pi = find_procinfo_or_die (pi->pid, 0); | |
1089 | ||
44122162 RO |
1090 | struct gdb_proc_ctl_pcsexit { |
1091 | procfs_ctl_t cmd; | |
1092 | /* Use char array to avoid alignment issues. */ | |
1093 | char sysset[sizeof (sysset_t)]; | |
c475f569 | 1094 | } arg; |
c906108c | 1095 | |
c475f569 RO |
1096 | arg.cmd = PCSEXIT; |
1097 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1098 | |
c475f569 | 1099 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
37de36c6 | 1100 | |
77382aee PA |
1101 | /* The above operation renders the procinfo's cached pstatus |
1102 | obsolete. */ | |
c3f6f71d | 1103 | pi->status_valid = 0; |
c906108c | 1104 | |
c3f6f71d JM |
1105 | return win; |
1106 | } | |
c906108c | 1107 | |
77382aee PA |
1108 | /* Specify the set of blocked / held signals in the process or LWP. |
1109 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1110 | |
d3581e61 | 1111 | static int |
44122162 | 1112 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1113 | { |
c3f6f71d JM |
1114 | int win; |
1115 | ||
77382aee PA |
1116 | /* We should never have to apply this operation to any procinfo |
1117 | except the one for the main process. If that ever changes for | |
1118 | any reason, then take out the following clause and replace it | |
1119 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1120 | |
c3f6f71d JM |
1121 | if (pi->tid != 0) |
1122 | pi = find_procinfo_or_die (pi->pid, 0); | |
1123 | ||
44122162 RO |
1124 | struct { |
1125 | procfs_ctl_t cmd; | |
1126 | /* Use char array to avoid alignment issues. */ | |
1127 | char hold[sizeof (sigset_t)]; | |
1128 | } arg; | |
1129 | ||
1130 | arg.cmd = PCSHOLD; | |
1131 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1132 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1133 | ||
77382aee PA |
1134 | /* The above operation renders the procinfo's cached pstatus |
1135 | obsolete. */ | |
c3f6f71d JM |
1136 | pi->status_valid = 0; |
1137 | ||
1138 | return win; | |
c906108c SS |
1139 | } |
1140 | ||
77382aee PA |
1141 | /* Returns the set of signals that are held / blocked. Will also copy |
1142 | the sigset if SAVE is non-zero. */ | |
c906108c | 1143 | |
44122162 RO |
1144 | static sigset_t * |
1145 | proc_get_held_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1146 | { |
44122162 | 1147 | sigset_t *ret = NULL; |
c3f6f71d | 1148 | |
77382aee PA |
1149 | /* We should never have to apply this operation to any procinfo |
1150 | except the one for the main process. If that ever changes for | |
1151 | any reason, then take out the following clause and replace it | |
1152 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1153 | |
c3f6f71d JM |
1154 | if (pi->tid != 0) |
1155 | pi = find_procinfo_or_die (pi->pid, 0); | |
1156 | ||
c3f6f71d JM |
1157 | if (!pi->status_valid) |
1158 | if (!proc_get_status (pi)) | |
1159 | return NULL; | |
1160 | ||
c3f6f71d | 1161 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d | 1162 | if (save && ret) |
44122162 | 1163 | memcpy (save, ret, sizeof (sigset_t)); |
c3f6f71d JM |
1164 | |
1165 | return ret; | |
c906108c SS |
1166 | } |
1167 | ||
77382aee PA |
1168 | /* Returns the set of signals that are traced / debugged. Will also |
1169 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1170 | |
44122162 RO |
1171 | static sigset_t * |
1172 | proc_get_traced_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1173 | { |
44122162 | 1174 | sigset_t *ret = NULL; |
c3f6f71d | 1175 | |
77382aee PA |
1176 | /* We should never have to apply this operation to any procinfo |
1177 | except the one for the main process. If that ever changes for | |
1178 | any reason, then take out the following clause and replace it | |
1179 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1180 | |
c3f6f71d JM |
1181 | if (pi->tid != 0) |
1182 | pi = find_procinfo_or_die (pi->pid, 0); | |
1183 | ||
c3f6f71d JM |
1184 | if (!pi->status_valid) |
1185 | if (!proc_get_status (pi)) | |
1186 | return NULL; | |
1187 | ||
1188 | ret = &pi->prstatus.pr_sigtrace; | |
c3f6f71d | 1189 | if (save && ret) |
44122162 | 1190 | memcpy (save, ret, sizeof (sigset_t)); |
c906108c | 1191 | |
c3f6f71d JM |
1192 | return ret; |
1193 | } | |
c906108c | 1194 | |
77382aee PA |
1195 | /* Returns the set of hardware faults that are traced /debugged. Will |
1196 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1197 | |
d3581e61 | 1198 | static fltset_t * |
fba45db2 | 1199 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1200 | { |
1201 | fltset_t *ret = NULL; | |
1202 | ||
77382aee PA |
1203 | /* We should never have to apply this operation to any procinfo |
1204 | except the one for the main process. If that ever changes for | |
1205 | any reason, then take out the following clause and replace it | |
1206 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1207 | |
c3f6f71d JM |
1208 | if (pi->tid != 0) |
1209 | pi = find_procinfo_or_die (pi->pid, 0); | |
1210 | ||
c3f6f71d JM |
1211 | if (!pi->status_valid) |
1212 | if (!proc_get_status (pi)) | |
1213 | return NULL; | |
1214 | ||
1215 | ret = &pi->prstatus.pr_flttrace; | |
c3f6f71d JM |
1216 | if (save && ret) |
1217 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1218 | |
c3f6f71d JM |
1219 | return ret; |
1220 | } | |
c906108c | 1221 | |
77382aee PA |
1222 | /* Returns the set of syscalls that are traced /debugged on entry. |
1223 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1224 | |
d3581e61 | 1225 | static sysset_t * |
fba45db2 | 1226 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1227 | { |
1228 | sysset_t *ret = NULL; | |
1229 | ||
77382aee PA |
1230 | /* We should never have to apply this operation to any procinfo |
1231 | except the one for the main process. If that ever changes for | |
1232 | any reason, then take out the following clause and replace it | |
1233 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1234 | |
c3f6f71d JM |
1235 | if (pi->tid != 0) |
1236 | pi = find_procinfo_or_die (pi->pid, 0); | |
1237 | ||
c3f6f71d JM |
1238 | if (!pi->status_valid) |
1239 | if (!proc_get_status (pi)) | |
1240 | return NULL; | |
1241 | ||
1242 | ret = &pi->prstatus.pr_sysentry; | |
c3f6f71d | 1243 | if (save && ret) |
44122162 | 1244 | memcpy (save, ret, sizeof (sysset_t)); |
c906108c | 1245 | |
c3f6f71d JM |
1246 | return ret; |
1247 | } | |
c5aa993b | 1248 | |
77382aee PA |
1249 | /* Returns the set of syscalls that are traced /debugged on exit. |
1250 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1251 | |
d3581e61 | 1252 | static sysset_t * |
fba45db2 | 1253 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1254 | { |
44122162 | 1255 | sysset_t *ret = NULL; |
c3f6f71d | 1256 | |
77382aee PA |
1257 | /* We should never have to apply this operation to any procinfo |
1258 | except the one for the main process. If that ever changes for | |
1259 | any reason, then take out the following clause and replace it | |
1260 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1261 | |
c3f6f71d JM |
1262 | if (pi->tid != 0) |
1263 | pi = find_procinfo_or_die (pi->pid, 0); | |
1264 | ||
c3f6f71d JM |
1265 | if (!pi->status_valid) |
1266 | if (!proc_get_status (pi)) | |
1267 | return NULL; | |
1268 | ||
1269 | ret = &pi->prstatus.pr_sysexit; | |
c3f6f71d | 1270 | if (save && ret) |
44122162 | 1271 | memcpy (save, ret, sizeof (sysset_t)); |
c3f6f71d JM |
1272 | |
1273 | return ret; | |
1274 | } | |
c906108c | 1275 | |
77382aee PA |
1276 | /* The current fault (if any) is cleared; the associated signal will |
1277 | not be sent to the process or LWP when it resumes. Returns | |
1278 | non-zero for success, zero for failure. */ | |
c906108c | 1279 | |
d3581e61 | 1280 | static int |
fba45db2 | 1281 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
1282 | { |
1283 | int win; | |
1284 | ||
77382aee PA |
1285 | /* We should never have to apply this operation to any procinfo |
1286 | except the one for the main process. If that ever changes for | |
1287 | any reason, then take out the following clause and replace it | |
1288 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1289 | |
c3f6f71d JM |
1290 | if (pi->tid != 0) |
1291 | pi = find_procinfo_or_die (pi->pid, 0); | |
1292 | ||
44122162 | 1293 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 1294 | |
44122162 | 1295 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d JM |
1296 | |
1297 | return win; | |
c906108c SS |
1298 | } |
1299 | ||
77382aee PA |
1300 | /* Set the "current signal" that will be delivered next to the |
1301 | process. NOTE: semantics are different from those of KILL. This | |
1302 | signal will be delivered to the process or LWP immediately when it | |
1303 | is resumed (even if the signal is held/blocked); it will NOT | |
1304 | immediately cause another event of interest, and will NOT first | |
1305 | trap back to the debugger. Returns non-zero for success, zero for | |
1306 | failure. */ | |
c3f6f71d | 1307 | |
d3581e61 | 1308 | static int |
fba45db2 | 1309 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1310 | { |
1311 | int win; | |
1312 | struct { | |
37de36c6 | 1313 | procfs_ctl_t cmd; |
c3f6f71d | 1314 | /* Use char array to avoid alignment issues. */ |
44122162 | 1315 | char sinfo[sizeof (siginfo_t)]; |
c3f6f71d | 1316 | } arg; |
44122162 | 1317 | siginfo_t mysinfo; |
c162e8c9 JM |
1318 | ptid_t wait_ptid; |
1319 | struct target_waitstatus wait_status; | |
c3f6f71d | 1320 | |
77382aee PA |
1321 | /* We should never have to apply this operation to any procinfo |
1322 | except the one for the main process. If that ever changes for | |
1323 | any reason, then take out the following clause and replace it | |
1324 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1325 | |
c3f6f71d JM |
1326 | if (pi->tid != 0) |
1327 | pi = find_procinfo_or_die (pi->pid, 0); | |
1328 | ||
c3f6f71d | 1329 | /* The pointer is just a type alias. */ |
c162e8c9 | 1330 | get_last_target_status (&wait_ptid, &wait_status); |
d7e15655 | 1331 | if (wait_ptid == inferior_ptid |
c162e8c9 | 1332 | && wait_status.kind == TARGET_WAITKIND_STOPPED |
2ea28649 | 1333 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 | 1334 | && proc_get_status (pi) |
c162e8c9 | 1335 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
c162e8c9 JM |
1336 | ) |
1337 | /* Use the siginfo associated with the signal being | |
1338 | redelivered. */ | |
44122162 | 1339 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (siginfo_t)); |
c162e8c9 JM |
1340 | else |
1341 | { | |
73930d4d KH |
1342 | mysinfo.si_signo = signo; |
1343 | mysinfo.si_code = 0; | |
1344 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1345 | mysinfo.si_uid = getuid (); /* ?why? */ | |
44122162 | 1346 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); |
c162e8c9 | 1347 | } |
c3f6f71d | 1348 | |
c3f6f71d JM |
1349 | arg.cmd = PCSSIG; |
1350 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1351 | |
c3f6f71d JM |
1352 | return win; |
1353 | } | |
c906108c | 1354 | |
77382aee PA |
1355 | /* The current signal (if any) is cleared, and is not sent to the |
1356 | process or LWP when it resumes. Returns non-zero for success, zero | |
1357 | for failure. */ | |
c906108c | 1358 | |
d3581e61 | 1359 | static int |
fba45db2 | 1360 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
1361 | { |
1362 | int win; | |
1363 | ||
77382aee PA |
1364 | /* We should never have to apply this operation to any procinfo |
1365 | except the one for the main process. If that ever changes for | |
1366 | any reason, then take out the following clause and replace it | |
1367 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1368 | |
c3f6f71d JM |
1369 | if (pi->tid != 0) |
1370 | pi = find_procinfo_or_die (pi->pid, 0); | |
1371 | ||
44122162 RO |
1372 | struct { |
1373 | procfs_ctl_t cmd; | |
1374 | /* Use char array to avoid alignment issues. */ | |
1375 | char sinfo[sizeof (siginfo_t)]; | |
1376 | } arg; | |
1377 | siginfo_t mysinfo; | |
1378 | ||
1379 | arg.cmd = PCSSIG; | |
1380 | /* The pointer is just a type alias. */ | |
1381 | mysinfo.si_signo = 0; | |
1382 | mysinfo.si_code = 0; | |
1383 | mysinfo.si_errno = 0; | |
1384 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1385 | mysinfo.si_uid = getuid (); /* ?why? */ | |
1386 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); | |
1387 | ||
1388 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1389 | |
c3f6f71d JM |
1390 | return win; |
1391 | } | |
c906108c | 1392 | |
772cf8be MK |
1393 | /* Return the general-purpose registers for the process or LWP |
1394 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1395 | |
d3581e61 | 1396 | static gdb_gregset_t * |
fba45db2 | 1397 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
1398 | { |
1399 | if (!pi->status_valid || !pi->gregs_valid) | |
1400 | if (!proc_get_status (pi)) | |
1401 | return NULL; | |
1402 | ||
c3f6f71d | 1403 | return &pi->prstatus.pr_lwp.pr_reg; |
c3f6f71d | 1404 | } |
c5aa993b | 1405 | |
772cf8be MK |
1406 | /* Return the general-purpose registers for the process or LWP |
1407 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1408 | |
d3581e61 | 1409 | static gdb_fpregset_t * |
fba45db2 | 1410 | proc_get_fpregs (procinfo *pi) |
c906108c | 1411 | { |
c3f6f71d JM |
1412 | if (!pi->status_valid || !pi->fpregs_valid) |
1413 | if (!proc_get_status (pi)) | |
1414 | return NULL; | |
1415 | ||
c3f6f71d | 1416 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c906108c SS |
1417 | } |
1418 | ||
772cf8be MK |
1419 | /* Write the general-purpose registers back to the process or LWP |
1420 | corresponding to PI. Return non-zero for success, zero for | |
1421 | failure. */ | |
c3f6f71d | 1422 | |
d3581e61 | 1423 | static int |
fba45db2 | 1424 | proc_set_gregs (procinfo *pi) |
c906108c | 1425 | { |
c3f6f71d JM |
1426 | gdb_gregset_t *gregs; |
1427 | int win; | |
c5aa993b | 1428 | |
772cf8be MK |
1429 | gregs = proc_get_gregs (pi); |
1430 | if (gregs == NULL) | |
1431 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 1432 | |
772cf8be | 1433 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c475f569 | 1434 | return 0; |
c3f6f71d | 1435 | else |
c906108c | 1436 | { |
c3f6f71d | 1437 | struct { |
37de36c6 | 1438 | procfs_ctl_t cmd; |
c3f6f71d JM |
1439 | /* Use char array to avoid alignment issues. */ |
1440 | char gregs[sizeof (gdb_gregset_t)]; | |
1441 | } arg; | |
1442 | ||
772cf8be | 1443 | arg.cmd = PCSREG; |
c3f6f71d JM |
1444 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
1445 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1446 | } |
c3f6f71d | 1447 | |
772cf8be | 1448 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1449 | pi->gregs_valid = 0; |
1450 | return win; | |
c906108c SS |
1451 | } |
1452 | ||
772cf8be MK |
1453 | /* Write the floating-pointer registers back to the process or LWP |
1454 | corresponding to PI. Return non-zero for success, zero for | |
1455 | failure. */ | |
c3f6f71d | 1456 | |
d3581e61 | 1457 | static int |
fba45db2 | 1458 | proc_set_fpregs (procinfo *pi) |
c906108c | 1459 | { |
c3f6f71d JM |
1460 | gdb_fpregset_t *fpregs; |
1461 | int win; | |
1462 | ||
772cf8be MK |
1463 | fpregs = proc_get_fpregs (pi); |
1464 | if (fpregs == NULL) | |
1465 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 1466 | |
772cf8be | 1467 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c475f569 | 1468 | return 0; |
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 fpregs[sizeof (gdb_fpregset_t)]; | |
1475 | } arg; | |
1476 | ||
772cf8be | 1477 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
1478 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
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->fpregs_valid = 0; |
1484 | return win; | |
c906108c SS |
1485 | } |
1486 | ||
77382aee PA |
1487 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
1488 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1489 | |
d3581e61 | 1490 | static int |
fba45db2 | 1491 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
1492 | { |
1493 | int win; | |
c906108c | 1494 | |
77382aee PA |
1495 | /* We might conceivably apply this operation to an LWP, and the |
1496 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1497 | |
c475f569 RO |
1498 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
1499 | return 0; | |
c3f6f71d JM |
1500 | else |
1501 | { | |
37de36c6 | 1502 | procfs_ctl_t cmd[2]; |
c906108c | 1503 | |
c3f6f71d JM |
1504 | cmd[0] = PCKILL; |
1505 | cmd[1] = signo; | |
1506 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c3f6f71d | 1507 | } |
c906108c | 1508 | |
c3f6f71d JM |
1509 | return win; |
1510 | } | |
c906108c | 1511 | |
77382aee PA |
1512 | /* Find the pid of the process that started this one. Returns the |
1513 | parent process pid, or zero. */ | |
c906108c | 1514 | |
d3581e61 | 1515 | static int |
fba45db2 | 1516 | proc_parent_pid (procinfo *pi) |
c906108c | 1517 | { |
77382aee PA |
1518 | /* We should never have to apply this operation to any procinfo |
1519 | except the one for the main process. If that ever changes for | |
1520 | any reason, then take out the following clause and replace it | |
1521 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1522 | |
c3f6f71d JM |
1523 | if (pi->tid != 0) |
1524 | pi = find_procinfo_or_die (pi->pid, 0); | |
1525 | ||
1526 | if (!pi->status_valid) | |
1527 | if (!proc_get_status (pi)) | |
1528 | return 0; | |
c5aa993b | 1529 | |
c3f6f71d JM |
1530 | return pi->prstatus.pr_ppid; |
1531 | } | |
1532 | ||
9a043c1d AC |
1533 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
1534 | (a.k.a void pointer)! */ | |
1535 | ||
1536 | static void * | |
1537 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
1538 | { | |
f5656ead | 1539 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
1540 | void *ptr; |
1541 | ||
4e906f53 | 1542 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 1543 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 1544 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
1545 | return ptr; |
1546 | } | |
1547 | ||
a0911fd0 | 1548 | static int |
fba45db2 | 1549 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 1550 | { |
c3f6f71d | 1551 | struct { |
37de36c6 | 1552 | procfs_ctl_t cmd; |
c3f6f71d JM |
1553 | char watch[sizeof (prwatch_t)]; |
1554 | } arg; | |
73930d4d | 1555 | prwatch_t pwatch; |
c3f6f71d | 1556 | |
9a043c1d AC |
1557 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
1558 | convert a target address into something that can be stored in a | |
1559 | native data structure. */ | |
73930d4d | 1560 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
73930d4d KH |
1561 | pwatch.pr_size = len; |
1562 | pwatch.pr_wflags = wflags; | |
c3f6f71d | 1563 | arg.cmd = PCWATCH; |
73930d4d | 1564 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d | 1565 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
c906108c SS |
1566 | } |
1567 | ||
965b60ee | 1568 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 1569 | |
c3f6f71d | 1570 | #include <sys/sysi86.h> |
c906108c | 1571 | |
77382aee PA |
1572 | /* The KEY is actually the value of the lower 16 bits of the GS |
1573 | register for the LWP that we're interested in. Returns the | |
1574 | matching ssh struct (LDT entry). */ | |
c906108c | 1575 | |
337c776f | 1576 | static struct ssd * |
c475f569 | 1577 | proc_get_LDT_entry (procinfo *pi, int key) /* ARI: editCase function */ |
c906108c | 1578 | { |
c3f6f71d | 1579 | static struct ssd *ldt_entry = NULL; |
c3f6f71d | 1580 | char pathname[MAX_PROC_NAME_SIZE]; |
c3f6f71d JM |
1581 | |
1582 | /* Allocate space for one LDT entry. | |
1583 | This alloc must persist, because we return a pointer to it. */ | |
1584 | if (ldt_entry == NULL) | |
8d749320 | 1585 | ldt_entry = XNEW (struct ssd); |
c3f6f71d JM |
1586 | |
1587 | /* Open the file descriptor for the LDT table. */ | |
c475f569 | 1588 | xsnprintf (pathname, sizeof (pathname), "/proc/%d/ldt", pi->pid); |
5dc1a704 TT |
1589 | scoped_fd fd (open_with_retry (pathname, O_RDONLY)); |
1590 | if (fd.get () < 0) | |
c906108c | 1591 | { |
c3f6f71d JM |
1592 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
1593 | return NULL; | |
c906108c SS |
1594 | } |
1595 | ||
c3f6f71d | 1596 | /* Now 'read' thru the table, find a match and return it. */ |
5dc1a704 TT |
1597 | while (read (fd.get (), ldt_entry, sizeof (struct ssd)) |
1598 | == sizeof (struct ssd)) | |
c906108c | 1599 | { |
c475f569 RO |
1600 | if (ldt_entry->sel == 0 |
1601 | && ldt_entry->bo == 0 | |
1602 | && ldt_entry->acc1 == 0 | |
1603 | && ldt_entry->acc2 == 0) | |
c3f6f71d | 1604 | break; /* end of table */ |
0df8b418 | 1605 | /* If key matches, return this entry. */ |
c3f6f71d | 1606 | if (ldt_entry->sel == key) |
70b33f19 | 1607 | return ldt_entry; |
c906108c | 1608 | } |
0df8b418 | 1609 | /* Loop ended, match not found. */ |
c3f6f71d | 1610 | return NULL; |
c3f6f71d | 1611 | } |
c906108c | 1612 | |
77382aee | 1613 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
1614 | |
1615 | struct ssd * | |
c475f569 | 1616 | procfs_find_LDT_entry (ptid_t ptid) /* ARI: editCase function */ |
965b60ee JB |
1617 | { |
1618 | gdb_gregset_t *gregs; | |
1619 | int key; | |
1620 | procinfo *pi; | |
1621 | ||
0df8b418 | 1622 | /* Find procinfo for the lwp. */ |
c475f569 RO |
1623 | pi = find_procinfo (ptid.pid (), ptid.lwp ()); |
1624 | if (pi == NULL) | |
965b60ee | 1625 | { |
0b62613e | 1626 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
e38504b3 | 1627 | ptid.pid (), ptid.lwp ()); |
965b60ee JB |
1628 | return NULL; |
1629 | } | |
0df8b418 | 1630 | /* get its general registers. */ |
c475f569 RO |
1631 | gregs = proc_get_gregs (pi); |
1632 | if (gregs == NULL) | |
965b60ee | 1633 | { |
0b62613e | 1634 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
e38504b3 | 1635 | ptid.pid (), ptid.lwp ()); |
965b60ee JB |
1636 | return NULL; |
1637 | } | |
0df8b418 | 1638 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
1639 | key = (*gregs)[GS] & 0xffff; |
1640 | ||
0df8b418 | 1641 | /* Find the matching entry and return it. */ |
965b60ee JB |
1642 | return proc_get_LDT_entry (pi, key); |
1643 | } | |
1644 | ||
1645 | #endif | |
c906108c | 1646 | |
c3f6f71d | 1647 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 1648 | |
c3f6f71d | 1649 | /* =================== Thread "MODULE" =================== */ |
c906108c | 1650 | |
44122162 RO |
1651 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
1652 | since there is a different way to do threads on every OS. */ | |
c906108c | 1653 | |
44122162 | 1654 | /* Returns the number of threads for the process. */ |
c906108c | 1655 | |
d3581e61 | 1656 | static int |
fba45db2 | 1657 | proc_get_nthreads (procinfo *pi) |
c906108c | 1658 | { |
c3f6f71d JM |
1659 | if (!pi->status_valid) |
1660 | if (!proc_get_status (pi)) | |
1661 | return 0; | |
c5aa993b | 1662 | |
44122162 RO |
1663 | /* Only works for the process procinfo, because the LWP procinfos do not |
1664 | get prstatus filled in. */ | |
0df8b418 | 1665 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 1666 | pi = find_procinfo_or_die (pi->pid, 0); |
c3f6f71d | 1667 | return pi->prstatus.pr_nlwp; |
c906108c SS |
1668 | } |
1669 | ||
77382aee PA |
1670 | /* LWP version. |
1671 | ||
1672 | Return the ID of the thread that had an event of interest. | |
1673 | (ie. the one that hit a breakpoint or other traced event). All | |
1674 | other things being equal, this should be the ID of a thread that is | |
1675 | currently executing. */ | |
c3f6f71d | 1676 | |
d3581e61 | 1677 | static int |
fba45db2 | 1678 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 1679 | { |
77382aee PA |
1680 | /* Note: this should be applied to the root procinfo for the |
1681 | process, not to the procinfo for an LWP. If applied to the | |
1682 | procinfo for an LWP, it will simply return that LWP's ID. In | |
1683 | that case, find the parent process procinfo. */ | |
19958708 | 1684 | |
c3f6f71d JM |
1685 | if (pi->tid != 0) |
1686 | pi = find_procinfo_or_die (pi->pid, 0); | |
1687 | ||
1688 | if (!pi->status_valid) | |
1689 | if (!proc_get_status (pi)) | |
1690 | return 0; | |
1691 | ||
c3f6f71d | 1692 | return pi->prstatus.pr_lwp.pr_lwpid; |
c3f6f71d JM |
1693 | } |
1694 | ||
77382aee PA |
1695 | /* Discover the IDs of all the threads within the process, and create |
1696 | a procinfo for each of them (chained to the parent). This | |
1697 | unfortunately requires a different method on every OS. Returns | |
1698 | non-zero for success, zero for failure. */ | |
c906108c | 1699 | |
a0911fd0 | 1700 | static int |
fba45db2 | 1701 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
1702 | { |
1703 | if (thread && parent) /* sanity */ | |
c906108c | 1704 | { |
c3f6f71d JM |
1705 | thread->status_valid = 0; |
1706 | if (!proc_get_status (thread)) | |
1707 | destroy_one_procinfo (&parent->thread_list, thread); | |
1708 | } | |
1709 | return 0; /* keep iterating */ | |
1710 | } | |
c5aa993b | 1711 | |
d3581e61 | 1712 | static int |
fba45db2 | 1713 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
1714 | { |
1715 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
1716 | struct dirent *direntry; | |
c3f6f71d | 1717 | procinfo *thread; |
f0b3976b | 1718 | gdb_dir_up dirp; |
c3f6f71d JM |
1719 | int lwpid; |
1720 | ||
77382aee PA |
1721 | /* We should never have to apply this operation to any procinfo |
1722 | except the one for the main process. If that ever changes for | |
1723 | any reason, then take out the following clause and replace it | |
1724 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1725 | |
c3f6f71d JM |
1726 | if (pi->tid != 0) |
1727 | pi = find_procinfo_or_die (pi->pid, 0); | |
1728 | ||
1729 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
1730 | ||
05b4bd79 PA |
1731 | /* Note: this brute-force method was originally devised for Unixware |
1732 | (support removed since), and will also work on Solaris 2.6 and | |
1733 | 2.7. The original comment mentioned the existence of a much | |
1734 | simpler and more elegant way to do this on Solaris, but didn't | |
1735 | point out what that was. */ | |
c3f6f71d JM |
1736 | |
1737 | strcpy (pathname, pi->pathname); | |
1738 | strcat (pathname, "/lwp"); | |
f0b3976b TT |
1739 | dirp.reset (opendir (pathname)); |
1740 | if (dirp == NULL) | |
c3f6f71d JM |
1741 | proc_error (pi, "update_threads, opendir", __LINE__); |
1742 | ||
f0b3976b | 1743 | while ((direntry = readdir (dirp.get ())) != NULL) |
c3f6f71d JM |
1744 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ |
1745 | { | |
1746 | lwpid = atoi (&direntry->d_name[0]); | |
c475f569 RO |
1747 | thread = create_procinfo (pi->pid, lwpid); |
1748 | if (thread == NULL) | |
c3f6f71d JM |
1749 | proc_error (pi, "update_threads, create_procinfo", __LINE__); |
1750 | } | |
1751 | pi->threads_valid = 1; | |
c3f6f71d JM |
1752 | return 1; |
1753 | } | |
c906108c | 1754 | |
77382aee PA |
1755 | /* Given a pointer to a function, call that function once for each lwp |
1756 | in the procinfo list, until the function returns non-zero, in which | |
1757 | event return the value returned by the function. | |
1758 | ||
1759 | Note: this function does NOT call update_threads. If you want to | |
1760 | discover new threads first, you must call that function explicitly. | |
1761 | This function just makes a quick pass over the currently-known | |
1762 | procinfos. | |
1763 | ||
1764 | PI is the parent process procinfo. FUNC is the per-thread | |
1765 | function. PTR is an opaque parameter for function. Returns the | |
1766 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 1767 | |
d3581e61 | 1768 | static int |
d0849a9a KB |
1769 | proc_iterate_over_threads (procinfo *pi, |
1770 | int (*func) (procinfo *, procinfo *, void *), | |
1771 | void *ptr) | |
c906108c | 1772 | { |
c3f6f71d JM |
1773 | procinfo *thread, *next; |
1774 | int retval = 0; | |
c906108c | 1775 | |
77382aee PA |
1776 | /* We should never have to apply this operation to any procinfo |
1777 | except the one for the main process. If that ever changes for | |
1778 | any reason, then take out the following clause and replace it | |
1779 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1780 | |
c3f6f71d JM |
1781 | if (pi->tid != 0) |
1782 | pi = find_procinfo_or_die (pi->pid, 0); | |
1783 | ||
1784 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 1785 | { |
0df8b418 | 1786 | next = thread->next; /* In case thread is destroyed. */ |
c475f569 RO |
1787 | retval = (*func) (pi, thread, ptr); |
1788 | if (retval != 0) | |
c3f6f71d | 1789 | break; |
c906108c | 1790 | } |
c3f6f71d JM |
1791 | |
1792 | return retval; | |
c906108c SS |
1793 | } |
1794 | ||
c3f6f71d JM |
1795 | /* =================== END, Thread "MODULE" =================== */ |
1796 | ||
1797 | /* =================== END, /proc "MODULE" =================== */ | |
1798 | ||
1799 | /* =================== GDB "MODULE" =================== */ | |
1800 | ||
77382aee PA |
1801 | /* Here are all of the gdb target vector functions and their |
1802 | friends. */ | |
c3f6f71d | 1803 | |
39f77062 | 1804 | static ptid_t do_attach (ptid_t ptid); |
6bd6f3b6 | 1805 | static void do_detach (); |
9185ddce | 1806 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 1807 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 1808 | |
77382aee PA |
1809 | /* Sets up the inferior to be debugged. Registers to trace signals, |
1810 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
1811 | may want to customize that. Returns zero for success (note! | |
1812 | unlike most functions in this module); on failure, returns the LINE | |
1813 | NUMBER where it failed! */ | |
c3f6f71d JM |
1814 | |
1815 | static int | |
fba45db2 | 1816 | procfs_debug_inferior (procinfo *pi) |
c906108c | 1817 | { |
c3f6f71d | 1818 | fltset_t traced_faults; |
44122162 | 1819 | sigset_t traced_signals; |
37de36c6 KB |
1820 | sysset_t *traced_syscall_entries; |
1821 | sysset_t *traced_syscall_exits; | |
1822 | int status; | |
c906108c | 1823 | |
0df8b418 MS |
1824 | /* Register to trace hardware faults in the child. */ |
1825 | prfillset (&traced_faults); /* trace all faults... */ | |
44122162 | 1826 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
1827 | if (!proc_set_traced_faults (pi, &traced_faults)) |
1828 | return __LINE__; | |
c906108c | 1829 | |
2455069d UW |
1830 | /* Initially, register to trace all signals in the child. */ |
1831 | prfillset (&traced_signals); | |
1832 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
1833 | return __LINE__; |
1834 | ||
37de36c6 | 1835 | |
c3f6f71d | 1836 | /* Register to trace the 'exit' system call (on entry). */ |
c475f569 | 1837 | traced_syscall_entries = XNEW (sysset_t); |
44122162 RO |
1838 | premptyset (traced_syscall_entries); |
1839 | praddset (traced_syscall_entries, SYS_exit); | |
1840 | praddset (traced_syscall_entries, SYS_lwp_exit); | |
c906108c | 1841 | |
37de36c6 KB |
1842 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
1843 | xfree (traced_syscall_entries); | |
1844 | if (!status) | |
c3f6f71d JM |
1845 | return __LINE__; |
1846 | ||
44122162 | 1847 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
1848 | /* GW: Rationale... |
1849 | Not all systems with /proc have all the exec* syscalls with the same | |
1850 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 1851 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 1852 | |
c475f569 | 1853 | traced_syscall_exits = XNEW (sysset_t); |
44122162 | 1854 | premptyset (traced_syscall_exits); |
c3f6f71d | 1855 | #ifdef SYS_exec |
44122162 | 1856 | praddset (traced_syscall_exits, SYS_exec); |
37de36c6 | 1857 | #endif |
44122162 RO |
1858 | praddset (traced_syscall_exits, SYS_execve); |
1859 | praddset (traced_syscall_exits, SYS_lwp_create); | |
1860 | praddset (traced_syscall_exits, SYS_lwp_exit); | |
c906108c | 1861 | |
37de36c6 KB |
1862 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
1863 | xfree (traced_syscall_exits); | |
1864 | if (!status) | |
c3f6f71d JM |
1865 | return __LINE__; |
1866 | ||
c3f6f71d | 1867 | return 0; |
c906108c SS |
1868 | } |
1869 | ||
f6ac5f3d PA |
1870 | void |
1871 | procfs_target::attach (const char *args, int from_tty) | |
c906108c | 1872 | { |
c3f6f71d JM |
1873 | char *exec_file; |
1874 | int pid; | |
1875 | ||
74164c56 | 1876 | pid = parse_pid_to_attach (args); |
c3f6f71d | 1877 | |
c3f6f71d | 1878 | if (pid == getpid ()) |
8a3fe4f8 | 1879 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 1880 | |
c3f6f71d | 1881 | if (from_tty) |
c906108c | 1882 | { |
c3f6f71d JM |
1883 | exec_file = get_exec_file (0); |
1884 | ||
1885 | if (exec_file) | |
a3f17187 | 1886 | printf_filtered (_("Attaching to program `%s', %s\n"), |
a068643d | 1887 | exec_file, target_pid_to_str (ptid_t (pid)).c_str ()); |
c3f6f71d | 1888 | else |
a3f17187 | 1889 | printf_filtered (_("Attaching to %s\n"), |
a068643d | 1890 | target_pid_to_str (ptid_t (pid)).c_str ()); |
c3f6f71d JM |
1891 | |
1892 | fflush (stdout); | |
c906108c | 1893 | } |
f2907e49 | 1894 | inferior_ptid = do_attach (ptid_t (pid)); |
f6ac5f3d PA |
1895 | if (!target_is_pushed (this)) |
1896 | push_target (this); | |
c3f6f71d JM |
1897 | } |
1898 | ||
f6ac5f3d PA |
1899 | void |
1900 | procfs_target::detach (inferior *inf, int from_tty) | |
c3f6f71d | 1901 | { |
e99b03dc | 1902 | int pid = inferior_ptid.pid (); |
cc377e6b | 1903 | |
c3f6f71d | 1904 | if (from_tty) |
c906108c | 1905 | { |
995816ba | 1906 | const char *exec_file; |
cc377e6b | 1907 | |
c3f6f71d | 1908 | exec_file = get_exec_file (0); |
cc377e6b | 1909 | if (exec_file == NULL) |
c3f6f71d | 1910 | exec_file = ""; |
cc377e6b | 1911 | |
a3f17187 | 1912 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
a068643d | 1913 | target_pid_to_str (ptid_t (pid)).c_str ()); |
c906108c | 1914 | } |
19958708 | 1915 | |
6bd6f3b6 | 1916 | do_detach (); |
cc377e6b | 1917 | |
39f77062 | 1918 | inferior_ptid = null_ptid; |
b7a08269 | 1919 | detach_inferior (inf); |
f6ac5f3d | 1920 | maybe_unpush_target (); |
c906108c SS |
1921 | } |
1922 | ||
39f77062 KB |
1923 | static ptid_t |
1924 | do_attach (ptid_t ptid) | |
c906108c | 1925 | { |
c3f6f71d | 1926 | procinfo *pi; |
181e7f93 | 1927 | struct inferior *inf; |
c3f6f71d | 1928 | int fail; |
2689673f | 1929 | int lwpid; |
c3f6f71d | 1930 | |
c475f569 RO |
1931 | pi = create_procinfo (ptid.pid (), 0); |
1932 | if (pi == NULL) | |
8a3fe4f8 | 1933 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
1934 | |
1935 | if (!open_procinfo_files (pi, FD_CTL)) | |
1936 | { | |
1937 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
c475f569 RO |
1938 | xsnprintf (errmsg, sizeof (errmsg), |
1939 | "do_attach: couldn't open /proc file for process %d", | |
1940 | ptid.pid ()); | |
c3f6f71d JM |
1941 | dead_procinfo (pi, errmsg, NOKILL); |
1942 | } | |
c906108c | 1943 | |
c3f6f71d JM |
1944 | /* Stop the process (if it isn't already stopped). */ |
1945 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 1946 | { |
c3f6f71d JM |
1947 | pi->was_stopped = 1; |
1948 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
1949 | } |
1950 | else | |
1951 | { | |
c3f6f71d JM |
1952 | pi->was_stopped = 0; |
1953 | /* Set the process to run again when we close it. */ | |
1954 | if (!proc_set_run_on_last_close (pi)) | |
1955 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
1956 | ||
0df8b418 | 1957 | /* Now stop the process. */ |
c3f6f71d JM |
1958 | if (!proc_stop_process (pi)) |
1959 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
1960 | pi->ignore_next_sigstop = 1; | |
c906108c | 1961 | } |
c3f6f71d JM |
1962 | /* Save some of the /proc state to be restored if we detach. */ |
1963 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
1964 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
1965 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
1966 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 1967 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
1968 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
1969 | NOKILL); | |
37de36c6 | 1970 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 1971 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
1972 | NOKILL); |
1973 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
1974 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
1975 | ||
c475f569 RO |
1976 | fail = procfs_debug_inferior (pi); |
1977 | if (fail != 0) | |
c3f6f71d JM |
1978 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); |
1979 | ||
6c95b8df PA |
1980 | inf = current_inferior (); |
1981 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 1982 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 1983 | inf->attach_flag = 1; |
2689673f PA |
1984 | |
1985 | /* Create a procinfo for the current lwp. */ | |
1986 | lwpid = proc_get_current_thread (pi); | |
1987 | create_procinfo (pi->pid, lwpid); | |
1988 | ||
1989 | /* Add it to gdb's thread list. */ | |
fd79271b | 1990 | ptid = ptid_t (pi->pid, lwpid, 0); |
2689673f PA |
1991 | add_thread (ptid); |
1992 | ||
1993 | return ptid; | |
c906108c SS |
1994 | } |
1995 | ||
1996 | static void | |
6bd6f3b6 | 1997 | do_detach () |
c906108c | 1998 | { |
c3f6f71d | 1999 | procinfo *pi; |
c906108c | 2000 | |
0df8b418 | 2001 | /* Find procinfo for the main process. */ |
e99b03dc | 2002 | pi = find_procinfo_or_die (inferior_ptid.pid (), |
dfd4cc63 | 2003 | 0); /* FIXME: threads */ |
c5aa993b | 2004 | |
c3f6f71d JM |
2005 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
2006 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 2007 | |
c3f6f71d JM |
2008 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
2009 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
2010 | ||
37de36c6 | 2011 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2012 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
2013 | ||
37de36c6 | 2014 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2015 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
2016 | ||
2017 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
2018 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
2019 | ||
6bd6f3b6 SM |
2020 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
2021 | if (!(pi->was_stopped) | |
2022 | || query (_("Was stopped when attached, make it runnable again? "))) | |
c3f6f71d JM |
2023 | { |
2024 | /* Clear any pending signal. */ | |
2025 | if (!proc_clear_current_fault (pi)) | |
2026 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
2027 | ||
6bd6f3b6 | 2028 | if (!proc_clear_current_signal (pi)) |
1a303dec MS |
2029 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
2030 | ||
c3f6f71d JM |
2031 | if (!proc_set_run_on_last_close (pi)) |
2032 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
2033 | } | |
2034 | ||
c3f6f71d | 2035 | destroy_procinfo (pi); |
c906108c SS |
2036 | } |
2037 | ||
772cf8be MK |
2038 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
2039 | for all registers. | |
2040 | ||
2041 | ??? Is the following note still relevant? We can't get individual | |
2042 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
2043 | don't bother with caching at all in that case. | |
2044 | ||
2045 | NOTE: Since the /proc interface cannot give us individual | |
2046 | registers, we pay no attention to REGNUM, and just fetch them all. | |
2047 | This results in the possibility that we will do unnecessarily many | |
2048 | fetches, since we may be called repeatedly for individual | |
2049 | registers. So we cache the results, and mark the cache invalid | |
2050 | when the process is resumed. */ | |
c3f6f71d | 2051 | |
f6ac5f3d PA |
2052 | void |
2053 | procfs_target::fetch_registers (struct regcache *regcache, int regnum) | |
c906108c | 2054 | { |
772cf8be MK |
2055 | gdb_gregset_t *gregs; |
2056 | procinfo *pi; | |
222312d3 | 2057 | ptid_t ptid = regcache->ptid (); |
e99b03dc | 2058 | int pid = ptid.pid (); |
e38504b3 | 2059 | int tid = ptid.lwp (); |
ac7936df | 2060 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2061 | |
2689673f | 2062 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2063 | |
2064 | if (pi == NULL) | |
8a3fe4f8 | 2065 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
a068643d | 2066 | target_pid_to_str (ptid).c_str ()); |
c3f6f71d | 2067 | |
772cf8be MK |
2068 | gregs = proc_get_gregs (pi); |
2069 | if (gregs == NULL) | |
c3f6f71d JM |
2070 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
2071 | ||
56be3814 | 2072 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 2073 | |
40a6adc1 | 2074 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2075 | { |
772cf8be MK |
2076 | gdb_fpregset_t *fpregs; |
2077 | ||
40a6adc1 MD |
2078 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2079 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2080 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2081 | return; /* Not a floating point register. */ |
c5aa993b | 2082 | |
772cf8be MK |
2083 | fpregs = proc_get_fpregs (pi); |
2084 | if (fpregs == NULL) | |
60054393 | 2085 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 2086 | |
56be3814 | 2087 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 2088 | } |
c906108c SS |
2089 | } |
2090 | ||
772cf8be MK |
2091 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
2092 | this for all registers. | |
2093 | ||
2094 | NOTE: Since the /proc interface will not read individual registers, | |
2095 | we will cache these requests until the process is resumed, and only | |
2096 | then write them back to the inferior process. | |
77382aee | 2097 | |
772cf8be MK |
2098 | FIXME: is that a really bad idea? Have to think about cases where |
2099 | writing one register might affect the value of others, etc. */ | |
c906108c | 2100 | |
f6ac5f3d PA |
2101 | void |
2102 | procfs_target::store_registers (struct regcache *regcache, int regnum) | |
c3f6f71d | 2103 | { |
772cf8be MK |
2104 | gdb_gregset_t *gregs; |
2105 | procinfo *pi; | |
222312d3 | 2106 | ptid_t ptid = regcache->ptid (); |
e99b03dc | 2107 | int pid = ptid.pid (); |
e38504b3 | 2108 | int tid = ptid.lwp (); |
ac7936df | 2109 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2110 | |
2689673f | 2111 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2112 | |
2113 | if (pi == NULL) | |
8a3fe4f8 | 2114 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
a068643d | 2115 | target_pid_to_str (ptid).c_str ()); |
c906108c | 2116 | |
772cf8be MK |
2117 | gregs = proc_get_gregs (pi); |
2118 | if (gregs == NULL) | |
c3f6f71d | 2119 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 2120 | |
56be3814 | 2121 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
2122 | if (!proc_set_gregs (pi)) |
2123 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 2124 | |
40a6adc1 | 2125 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2126 | { |
772cf8be MK |
2127 | gdb_fpregset_t *fpregs; |
2128 | ||
40a6adc1 MD |
2129 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2130 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2131 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2132 | return; /* Not a floating point register. */ |
60054393 | 2133 | |
772cf8be MK |
2134 | fpregs = proc_get_fpregs (pi); |
2135 | if (fpregs == NULL) | |
60054393 MS |
2136 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
2137 | ||
56be3814 | 2138 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
2139 | if (!proc_set_fpregs (pi)) |
2140 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
2141 | } | |
c3f6f71d | 2142 | } |
c906108c | 2143 | |
37de36c6 KB |
2144 | static int |
2145 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
2146 | { | |
37de36c6 KB |
2147 | if (scall == SYS_lwp_exit) |
2148 | return 1; | |
37de36c6 KB |
2149 | return 0; |
2150 | } | |
2151 | ||
2152 | static int | |
2153 | syscall_is_exit (procinfo *pi, int scall) | |
2154 | { | |
37de36c6 KB |
2155 | if (scall == SYS_exit) |
2156 | return 1; | |
37de36c6 KB |
2157 | return 0; |
2158 | } | |
2159 | ||
2160 | static int | |
2161 | syscall_is_exec (procinfo *pi, int scall) | |
2162 | { | |
2163 | #ifdef SYS_exec | |
2164 | if (scall == SYS_exec) | |
2165 | return 1; | |
2166 | #endif | |
37de36c6 KB |
2167 | if (scall == SYS_execve) |
2168 | return 1; | |
37de36c6 KB |
2169 | return 0; |
2170 | } | |
2171 | ||
2172 | static int | |
2173 | syscall_is_lwp_create (procinfo *pi, int scall) | |
2174 | { | |
37de36c6 KB |
2175 | if (scall == SYS_lwp_create) |
2176 | return 1; | |
37de36c6 KB |
2177 | return 0; |
2178 | } | |
2179 | ||
77382aee PA |
2180 | /* Retrieve the next stop event from the child process. If child has |
2181 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
2182 | (or possibly wait eventcodes) into gdb internal event codes. | |
2183 | Returns the id of process (and possibly thread) that incurred the | |
2184 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 2185 | |
f6ac5f3d PA |
2186 | ptid_t |
2187 | procfs_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
2188 | int options) | |
c906108c | 2189 | { |
0df8b418 | 2190 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 2191 | procinfo *pi; |
39f77062 KB |
2192 | int wstat; |
2193 | int temp_tid; | |
2194 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
2195 | int why, what, flags; |
2196 | int retry = 0; | |
c906108c | 2197 | |
c3f6f71d | 2198 | wait_again: |
c906108c | 2199 | |
c3f6f71d JM |
2200 | retry++; |
2201 | wstat = 0; | |
f2907e49 | 2202 | retval = ptid_t (-1); |
c906108c | 2203 | |
0df8b418 | 2204 | /* Find procinfo for main process. */ |
e99b03dc | 2205 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d | 2206 | if (pi) |
c906108c | 2207 | { |
0df8b418 | 2208 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
2209 | pi->status_valid = 0; |
2210 | pi->gregs_valid = 0; | |
2211 | pi->fpregs_valid = 0; | |
2212 | ||
0df8b418 | 2213 | #if 0 /* just try this out... */ |
c3f6f71d JM |
2214 | flags = proc_flags (pi); |
2215 | why = proc_why (pi); | |
2216 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 2217 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
2218 | #endif |
2219 | /* If child is not stopped, wait for it to stop. */ | |
c475f569 RO |
2220 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
2221 | && !proc_wait_for_stop (pi)) | |
c906108c | 2222 | { |
0df8b418 | 2223 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 2224 | if (errno == ENOENT) |
c906108c | 2225 | { |
39f77062 KB |
2226 | int wait_retval; |
2227 | ||
0df8b418 | 2228 | /* /proc file not found; presumably child has terminated. */ |
f6ac5f3d | 2229 | wait_retval = ::wait (&wstat); /* "wait" for the child's exit. */ |
c3f6f71d | 2230 | |
dfd4cc63 | 2231 | /* Wrong child? */ |
e99b03dc | 2232 | if (wait_retval != inferior_ptid.pid ()) |
3e43a32a MS |
2233 | error (_("procfs: couldn't stop " |
2234 | "process %d: wait returned %d."), | |
e99b03dc | 2235 | inferior_ptid.pid (), wait_retval); |
c3f6f71d | 2236 | /* FIXME: might I not just use waitpid? |
0df8b418 | 2237 | Or try find_procinfo to see if I know about this child? */ |
f2907e49 | 2238 | retval = ptid_t (wait_retval); |
c906108c | 2239 | } |
d1566ff5 FN |
2240 | else if (errno == EINTR) |
2241 | goto wait_again; | |
c3f6f71d | 2242 | else |
c906108c | 2243 | { |
0df8b418 | 2244 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 2245 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 2246 | } |
c3f6f71d JM |
2247 | } |
2248 | else | |
2249 | { | |
2250 | /* This long block is reached if either: | |
2251 | a) the child was already stopped, or | |
2252 | b) we successfully waited for the child with wait_for_stop. | |
2253 | This block will analyze the /proc status, and translate it | |
2254 | into a waitstatus for GDB. | |
2255 | ||
2256 | If we actually had to call wait because the /proc file | |
19958708 | 2257 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
2258 | because we already have a waitstatus. */ |
2259 | ||
2260 | flags = proc_flags (pi); | |
2261 | why = proc_why (pi); | |
2262 | what = proc_what (pi); | |
2263 | ||
c3f6f71d | 2264 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 2265 | { |
c3f6f71d JM |
2266 | /* If it's running async (for single_thread control), |
2267 | set it back to normal again. */ | |
2268 | if (flags & PR_ASYNC) | |
2269 | if (!proc_unset_async (pi)) | |
2270 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
c3f6f71d JM |
2271 | |
2272 | if (info_verbose) | |
2273 | proc_prettyprint_why (why, what, 1); | |
2274 | ||
2275 | /* The 'pid' we will return to GDB is composed of | |
2276 | the process ID plus the lwp ID. */ | |
fd79271b | 2277 | retval = ptid_t (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
2278 | |
2279 | switch (why) { | |
2280 | case PR_SIGNALLED: | |
2281 | wstat = (what << 8) | 0177; | |
2282 | break; | |
2283 | case PR_SYSENTRY: | |
37de36c6 | 2284 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 2285 | { |
17faa917 DJ |
2286 | if (print_thread_events) |
2287 | printf_unfiltered (_("[%s exited]\n"), | |
a068643d | 2288 | target_pid_to_str (retval).c_str ()); |
b7a08269 | 2289 | delete_thread (find_thread_ptid (retval)); |
37de36c6 KB |
2290 | status->kind = TARGET_WAITKIND_SPURIOUS; |
2291 | return retval; | |
2292 | } | |
2293 | else if (syscall_is_exit (pi, what)) | |
2294 | { | |
181e7f93 PA |
2295 | struct inferior *inf; |
2296 | ||
0df8b418 | 2297 | /* Handle SYS_exit call only. */ |
37de36c6 | 2298 | /* Stopped at entry to SYS_exit. |
19958708 | 2299 | Make it runnable, resume it, then use |
37de36c6 | 2300 | the wait system call to get its exit code. |
19958708 | 2301 | Proc_run_process always clears the current |
37de36c6 KB |
2302 | fault and signal. |
2303 | Then return its exit status. */ | |
2304 | pi->status_valid = 0; | |
2305 | wstat = 0; | |
19958708 | 2306 | /* FIXME: what we should do is return |
37de36c6 KB |
2307 | TARGET_WAITKIND_SPURIOUS. */ |
2308 | if (!proc_run_process (pi, 0, 0)) | |
2309 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
2310 | |
2311 | inf = find_inferior_pid (pi->pid); | |
2312 | if (inf->attach_flag) | |
c3f6f71d | 2313 | { |
19958708 | 2314 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
2315 | return a "success" exit code. Bogus: what if |
2316 | it returns something else? */ | |
2317 | wstat = 0; | |
39f77062 | 2318 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
2319 | } |
2320 | else | |
2321 | { | |
f6ac5f3d | 2322 | int temp = ::wait (&wstat); |
37de36c6 KB |
2323 | |
2324 | /* FIXME: shouldn't I make sure I get the right | |
2325 | event from the right process? If (for | |
2326 | instance) I have killed an earlier inferior | |
2327 | process but failed to clean up after it | |
2328 | somehow, I could get its termination event | |
2329 | here. */ | |
2330 | ||
0df8b418 MS |
2331 | /* If wait returns -1, that's what we return |
2332 | to GDB. */ | |
37de36c6 | 2333 | if (temp < 0) |
f2907e49 | 2334 | retval = ptid_t (temp); |
c3f6f71d | 2335 | } |
c3f6f71d | 2336 | } |
37de36c6 KB |
2337 | else |
2338 | { | |
a3f17187 | 2339 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
2340 | proc_prettyprint_syscall (proc_what (pi), 0); |
2341 | printf_filtered ("\n"); | |
44122162 RO |
2342 | |
2343 | long i, nsysargs, *sysargs; | |
2344 | ||
c475f569 RO |
2345 | nsysargs = proc_nsysarg (pi); |
2346 | sysargs = proc_sysargs (pi); | |
2347 | ||
2348 | if (nsysargs > 0 && sysargs != NULL) | |
44122162 RO |
2349 | { |
2350 | printf_filtered (_("%ld syscall arguments:\n"), | |
2351 | nsysargs); | |
2352 | for (i = 0; i < nsysargs; i++) | |
2353 | printf_filtered ("#%ld: 0x%08lx\n", | |
2354 | i, sysargs[i]); | |
2355 | } | |
2356 | ||
37de36c6 KB |
2357 | if (status) |
2358 | { | |
0df8b418 MS |
2359 | /* How to exit gracefully, returning "unknown |
2360 | event". */ | |
37de36c6 | 2361 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2362 | return inferior_ptid; |
37de36c6 KB |
2363 | } |
2364 | else | |
2365 | { | |
2366 | /* How to keep going without returning to wfi: */ | |
049a8570 | 2367 | target_continue_no_signal (ptid); |
37de36c6 KB |
2368 | goto wait_again; |
2369 | } | |
2370 | } | |
2371 | break; | |
2372 | case PR_SYSEXIT: | |
2373 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 2374 | { |
37de36c6 KB |
2375 | /* Hopefully this is our own "fork-child" execing |
2376 | the real child. Hoax this event into a trap, and | |
2377 | GDB will see the child about to execute its start | |
0df8b418 | 2378 | address. */ |
37de36c6 KB |
2379 | wstat = (SIGTRAP << 8) | 0177; |
2380 | } | |
2381 | else if (syscall_is_lwp_create (pi, what)) | |
2382 | { | |
77382aee PA |
2383 | /* This syscall is somewhat like fork/exec. We |
2384 | will get the event twice: once for the parent | |
2385 | LWP, and once for the child. We should already | |
2386 | know about the parent LWP, but the child will | |
2387 | be new to us. So, whenever we get this event, | |
2388 | if it represents a new thread, simply add the | |
2389 | thread to the list. */ | |
c3f6f71d | 2390 | |
37de36c6 | 2391 | /* If not in procinfo list, add it. */ |
39f77062 KB |
2392 | temp_tid = proc_get_current_thread (pi); |
2393 | if (!find_procinfo (pi->pid, temp_tid)) | |
2394 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 2395 | |
fd79271b | 2396 | temp_ptid = ptid_t (pi->pid, temp_tid, 0); |
37de36c6 | 2397 | /* If not in GDB's thread list, add it. */ |
39f77062 | 2398 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
2399 | add_thread (temp_ptid); |
2400 | ||
0df8b418 | 2401 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 2402 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2403 | return inferior_ptid; |
37de36c6 KB |
2404 | } |
2405 | else if (syscall_is_lwp_exit (pi, what)) | |
2406 | { | |
17faa917 DJ |
2407 | if (print_thread_events) |
2408 | printf_unfiltered (_("[%s exited]\n"), | |
a068643d | 2409 | target_pid_to_str (retval).c_str ()); |
b7a08269 | 2410 | delete_thread (find_thread_ptid (retval)); |
37de36c6 KB |
2411 | status->kind = TARGET_WAITKIND_SPURIOUS; |
2412 | return retval; | |
c3f6f71d | 2413 | } |
37de36c6 KB |
2414 | else if (0) |
2415 | { | |
2416 | /* FIXME: Do we need to handle SYS_sproc, | |
2417 | SYS_fork, or SYS_vfork here? The old procfs | |
2418 | seemed to use this event to handle threads on | |
2419 | older (non-LWP) systems, where I'm assuming | |
19958708 | 2420 | that threads were actually separate processes. |
37de36c6 KB |
2421 | Irix, maybe? Anyway, low priority for now. */ |
2422 | } | |
2423 | else | |
2424 | { | |
a3f17187 | 2425 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
2426 | proc_prettyprint_syscall (proc_what (pi), 0); |
2427 | printf_filtered ("\n"); | |
44122162 RO |
2428 | |
2429 | long i, nsysargs, *sysargs; | |
2430 | ||
c475f569 RO |
2431 | nsysargs = proc_nsysarg (pi); |
2432 | sysargs = proc_sysargs (pi); | |
2433 | ||
2434 | if (nsysargs > 0 && sysargs != NULL) | |
44122162 RO |
2435 | { |
2436 | printf_filtered (_("%ld syscall arguments:\n"), | |
2437 | nsysargs); | |
2438 | for (i = 0; i < nsysargs; i++) | |
2439 | printf_filtered ("#%ld: 0x%08lx\n", | |
2440 | i, sysargs[i]); | |
2441 | } | |
2442 | ||
37de36c6 | 2443 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2444 | return inferior_ptid; |
37de36c6 | 2445 | } |
c3f6f71d JM |
2446 | break; |
2447 | case PR_REQUESTED: | |
2448 | #if 0 /* FIXME */ | |
2449 | wstat = (SIGSTOP << 8) | 0177; | |
2450 | break; | |
2451 | #else | |
2452 | if (retry < 5) | |
2453 | { | |
a3f17187 | 2454 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
2455 | pi->status_valid = 0; |
2456 | goto wait_again; | |
2457 | } | |
2458 | else | |
2459 | { | |
2460 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
2461 | temp_tid = proc_get_current_thread (pi); |
2462 | if (!find_procinfo (pi->pid, temp_tid)) | |
2463 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
2464 | |
2465 | /* If not in GDB's thread list, add it. */ | |
fd79271b | 2466 | temp_ptid = ptid_t (pi->pid, temp_tid, 0); |
39f77062 | 2467 | if (!in_thread_list (temp_ptid)) |
93815fbf | 2468 | add_thread (temp_ptid); |
c3f6f71d JM |
2469 | |
2470 | status->kind = TARGET_WAITKIND_STOPPED; | |
b196bc4c | 2471 | status->value.sig = GDB_SIGNAL_0; |
c3f6f71d JM |
2472 | return retval; |
2473 | } | |
2474 | #endif | |
2475 | case PR_JOBCONTROL: | |
2476 | wstat = (what << 8) | 0177; | |
2477 | break; | |
2478 | case PR_FAULTED: | |
7af6341f | 2479 | switch (what) { |
c3f6f71d JM |
2480 | case FLTWATCH: |
2481 | wstat = (SIGTRAP << 8) | 0177; | |
2482 | break; | |
0df8b418 | 2483 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 2484 | case FLTPRIV: |
c3f6f71d | 2485 | case FLTILL: |
c3f6f71d JM |
2486 | wstat = (SIGILL << 8) | 0177; |
2487 | break; | |
2488 | case FLTBPT: | |
c3f6f71d | 2489 | case FLTTRACE: |
c3f6f71d JM |
2490 | wstat = (SIGTRAP << 8) | 0177; |
2491 | break; | |
2492 | case FLTSTACK: | |
2493 | case FLTACCESS: | |
c3f6f71d | 2494 | case FLTBOUNDS: |
c3f6f71d JM |
2495 | wstat = (SIGSEGV << 8) | 0177; |
2496 | break; | |
2497 | case FLTIOVF: | |
2498 | case FLTIZDIV: | |
c3f6f71d | 2499 | case FLTFPE: |
c3f6f71d JM |
2500 | wstat = (SIGFPE << 8) | 0177; |
2501 | break; | |
3e43a32a | 2502 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
2503 | default: /* FIXME: use si_signo if possible for |
2504 | fault. */ | |
f2907e49 | 2505 | retval = ptid_t (-1); |
c3f6f71d | 2506 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 2507 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2508 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2509 | error (_("... giving up...")); |
c3f6f71d JM |
2510 | break; |
2511 | } | |
2512 | break; /* case PR_FAULTED: */ | |
2513 | default: /* switch (why) unmatched */ | |
2514 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 2515 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2516 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2517 | error (_("... giving up...")); |
c3f6f71d JM |
2518 | break; |
2519 | } | |
77382aee PA |
2520 | /* Got this far without error: If retval isn't in the |
2521 | threads database, add it. */ | |
c475f569 RO |
2522 | if (retval.pid () > 0 |
2523 | && retval != inferior_ptid | |
2524 | && !in_thread_list (retval)) | |
c906108c | 2525 | { |
77382aee PA |
2526 | /* We have a new thread. We need to add it both to |
2527 | GDB's list and to our own. If we don't create a | |
2528 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 2529 | add_thread (retval); |
e99b03dc | 2530 | if (find_procinfo (retval.pid (), |
e38504b3 | 2531 | retval.lwp ()) == NULL) |
e99b03dc | 2532 | create_procinfo (retval.pid (), |
e38504b3 | 2533 | retval.lwp ()); |
c906108c | 2534 | } |
c906108c | 2535 | } |
0df8b418 | 2536 | else /* Flags do not indicate STOPPED. */ |
c906108c | 2537 | { |
0df8b418 | 2538 | /* surely this can't happen... */ |
c3f6f71d JM |
2539 | printf_filtered ("procfs:%d -- process not stopped.\n", |
2540 | __LINE__); | |
2541 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 2542 | error (_("procfs: ...giving up...")); |
c906108c | 2543 | } |
c906108c | 2544 | } |
c906108c | 2545 | |
c3f6f71d JM |
2546 | if (status) |
2547 | store_waitstatus (status, wstat); | |
c906108c SS |
2548 | } |
2549 | ||
c3f6f71d JM |
2550 | return retval; |
2551 | } | |
c906108c | 2552 | |
4e73f23d RM |
2553 | /* Perform a partial transfer to/from the specified object. For |
2554 | memory transfers, fall back to the old memory xfer functions. */ | |
2555 | ||
f6ac5f3d PA |
2556 | enum target_xfer_status |
2557 | procfs_target::xfer_partial (enum target_object object, | |
2558 | const char *annex, gdb_byte *readbuf, | |
2559 | const gdb_byte *writebuf, ULONGEST offset, | |
2560 | ULONGEST len, ULONGEST *xfered_len) | |
4e73f23d RM |
2561 | { |
2562 | switch (object) | |
2563 | { | |
2564 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 2565 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d | 2566 | |
4e73f23d | 2567 | case TARGET_OBJECT_AUXV: |
f6ac5f3d | 2568 | return memory_xfer_auxv (this, object, annex, readbuf, writebuf, |
9b409511 | 2569 | offset, len, xfered_len); |
4e73f23d RM |
2570 | |
2571 | default: | |
4360561f TT |
2572 | return this->beneath ()->xfer_partial (object, annex, |
2573 | readbuf, writebuf, offset, len, | |
2574 | xfered_len); | |
4e73f23d RM |
2575 | } |
2576 | } | |
2577 | ||
e96027e0 PA |
2578 | /* Helper for procfs_xfer_partial that handles memory transfers. |
2579 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 2580 | |
e96027e0 PA |
2581 | static enum target_xfer_status |
2582 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2583 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
2584 | { |
2585 | procinfo *pi; | |
e96027e0 | 2586 | int nbytes; |
c906108c | 2587 | |
0df8b418 | 2588 | /* Find procinfo for main process. */ |
e99b03dc | 2589 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c475f569 | 2590 | if (pi->as_fd == 0 && open_procinfo_files (pi, FD_AS) == 0) |
c906108c | 2591 | { |
c3f6f71d | 2592 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 2593 | return TARGET_XFER_E_IO; |
c906108c | 2594 | } |
c906108c | 2595 | |
e96027e0 PA |
2596 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
2597 | return TARGET_XFER_E_IO; | |
2598 | ||
2599 | if (writebuf != NULL) | |
c906108c | 2600 | { |
e96027e0 PA |
2601 | PROCFS_NOTE ("write memory:\n"); |
2602 | nbytes = write (pi->as_fd, writebuf, len); | |
2603 | } | |
2604 | else | |
2605 | { | |
2606 | PROCFS_NOTE ("read memory:\n"); | |
2607 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 2608 | } |
e96027e0 PA |
2609 | if (nbytes <= 0) |
2610 | return TARGET_XFER_E_IO; | |
2611 | *xfered_len = nbytes; | |
2612 | return TARGET_XFER_OK; | |
c906108c SS |
2613 | } |
2614 | ||
77382aee PA |
2615 | /* Called by target_resume before making child runnable. Mark cached |
2616 | registers and status's invalid. If there are "dirty" caches that | |
2617 | need to be written back to the child process, do that. | |
c906108c | 2618 | |
77382aee PA |
2619 | File descriptors are also cached. As they are a limited resource, |
2620 | we cannot hold onto them indefinitely. However, as they are | |
2621 | expensive to open, we don't want to throw them away | |
2622 | indescriminately either. As a compromise, we will keep the file | |
2623 | descriptors for the parent process, but discard any file | |
2624 | descriptors we may have accumulated for the threads. | |
2625 | ||
2626 | As this function is called by iterate_over_threads, it always | |
2627 | returns zero (so that iterate_over_threads will keep | |
2628 | iterating). */ | |
c3f6f71d JM |
2629 | |
2630 | static int | |
fba45db2 | 2631 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 2632 | { |
77382aee PA |
2633 | /* About to run the child; invalidate caches and do any other |
2634 | cleanup. */ | |
c906108c | 2635 | |
c3f6f71d JM |
2636 | #if 0 |
2637 | if (pi->gregs_dirty) | |
c475f569 | 2638 | if (parent == NULL || proc_get_current_thread (parent) != pi->tid) |
c3f6f71d JM |
2639 | if (!proc_set_gregs (pi)) /* flush gregs cache */ |
2640 | proc_warn (pi, "target_resume, set_gregs", | |
2641 | __LINE__); | |
f5656ead | 2642 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 | 2643 | if (pi->fpregs_dirty) |
c475f569 | 2644 | if (parent == NULL || proc_get_current_thread (parent) != pi->tid) |
60054393 | 2645 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ |
19958708 | 2646 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 2647 | __LINE__); |
c906108c | 2648 | #endif |
c906108c | 2649 | |
c3f6f71d | 2650 | if (parent != NULL) |
c906108c | 2651 | { |
c3f6f71d | 2652 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 2653 | Close any file descriptors that it might have open. |
c3f6f71d JM |
2654 | We don't do this to the master (parent) procinfo. */ |
2655 | ||
2656 | close_procinfo_files (pi); | |
c906108c | 2657 | } |
c3f6f71d JM |
2658 | pi->gregs_valid = 0; |
2659 | pi->fpregs_valid = 0; | |
2660 | #if 0 | |
2661 | pi->gregs_dirty = 0; | |
2662 | pi->fpregs_dirty = 0; | |
c906108c | 2663 | #endif |
c3f6f71d JM |
2664 | pi->status_valid = 0; |
2665 | pi->threads_valid = 0; | |
c906108c | 2666 | |
c3f6f71d | 2667 | return 0; |
c906108c SS |
2668 | } |
2669 | ||
0fda6bd2 | 2670 | #if 0 |
77382aee PA |
2671 | /* A callback function for iterate_over_threads. Find the |
2672 | asynchronous signal thread, and make it runnable. See if that | |
2673 | helps matters any. */ | |
c906108c | 2674 | |
c3f6f71d | 2675 | static int |
fba45db2 | 2676 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 2677 | { |
c3f6f71d JM |
2678 | #ifdef PR_ASLWP |
2679 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 2680 | { |
c3f6f71d JM |
2681 | if (!proc_run_process (pi, 0, -1)) |
2682 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
2683 | return 1; | |
c906108c | 2684 | } |
c906108c | 2685 | #endif |
c3f6f71d | 2686 | return 0; |
c906108c | 2687 | } |
0fda6bd2 | 2688 | #endif |
c906108c | 2689 | |
77382aee PA |
2690 | /* Make the child process runnable. Normally we will then call |
2691 | procfs_wait and wait for it to stop again (unless gdb is async). | |
2692 | ||
2693 | If STEP is true, then arrange for the child to stop again after | |
2694 | executing a single instruction. If SIGNO is zero, then cancel any | |
2695 | pending signal; if non-zero, then arrange for the indicated signal | |
2696 | to be delivered to the child when it runs. If PID is -1, then | |
2697 | allow any child thread to run; if non-zero, then allow only the | |
2698 | indicated thread to run. (not implemented yet). */ | |
c906108c | 2699 | |
f6ac5f3d PA |
2700 | void |
2701 | procfs_target::resume (ptid_t ptid, int step, enum gdb_signal signo) | |
c906108c | 2702 | { |
c3f6f71d JM |
2703 | procinfo *pi, *thread; |
2704 | int native_signo; | |
2705 | ||
19958708 | 2706 | /* 2.1: |
c3f6f71d | 2707 | prrun.prflags |= PRSVADDR; |
19958708 | 2708 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 2709 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 2710 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
2711 | prrun.prflags |= PRCFAULT; clear current fault. |
2712 | ||
2713 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 2714 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
2715 | PRSVADDR is unnecessary. |
2716 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
2717 | This basically leaves PRSTEP and PRCSIG. | |
2718 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
2719 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 2720 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 2721 | |
0df8b418 | 2722 | /* Find procinfo for main process. */ |
e99b03dc | 2723 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d | 2724 | |
77382aee | 2725 | /* First cut: ignore pid argument. */ |
c3f6f71d | 2726 | errno = 0; |
c906108c | 2727 | |
c3f6f71d | 2728 | /* Convert signal to host numbering. */ |
c475f569 | 2729 | if (signo == 0 || (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
2730 | native_signo = 0; |
2731 | else | |
2ea28649 | 2732 | native_signo = gdb_signal_to_host (signo); |
c906108c | 2733 | |
c3f6f71d | 2734 | pi->ignore_next_sigstop = 0; |
c906108c | 2735 | |
77382aee PA |
2736 | /* Running the process voids all cached registers and status. */ |
2737 | /* Void the threads' caches first. */ | |
19958708 | 2738 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
2739 | /* Void the process procinfo's caches. */ |
2740 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 2741 | |
e99b03dc | 2742 | if (ptid.pid () != -1) |
c906108c | 2743 | { |
77382aee PA |
2744 | /* Resume a specific thread, presumably suppressing the |
2745 | others. */ | |
e38504b3 | 2746 | thread = find_procinfo (ptid.pid (), ptid.lwp ()); |
7de45904 | 2747 | if (thread != NULL) |
c906108c | 2748 | { |
c3f6f71d JM |
2749 | if (thread->tid != 0) |
2750 | { | |
77382aee PA |
2751 | /* We're to resume a specific thread, and not the |
2752 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
2753 | if (!proc_set_async (pi)) |
2754 | proc_error (pi, "target_resume, set_async", __LINE__); | |
c3f6f71d | 2755 | #if 0 |
19958708 | 2756 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
2757 | make_signal_thread_runnable, |
2758 | NULL); | |
2759 | #endif | |
0df8b418 MS |
2760 | pi = thread; /* Substitute the thread's procinfo |
2761 | for run. */ | |
c3f6f71d | 2762 | } |
c906108c SS |
2763 | } |
2764 | } | |
c906108c | 2765 | |
c3f6f71d | 2766 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 2767 | { |
c3f6f71d | 2768 | if (errno == EBUSY) |
77382aee PA |
2769 | warning (_("resume: target already running. " |
2770 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
2771 | else |
2772 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 2773 | } |
c3f6f71d | 2774 | } |
c906108c | 2775 | |
77382aee | 2776 | /* Set up to trace signals in the child process. */ |
c906108c | 2777 | |
f6ac5f3d | 2778 | void |
adc6a863 | 2779 | procfs_target::pass_signals (gdb::array_view<const unsigned char> pass_signals) |
c3f6f71d | 2780 | { |
44122162 | 2781 | sigset_t signals; |
e99b03dc | 2782 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
2455069d | 2783 | int signo; |
c906108c | 2784 | |
2455069d UW |
2785 | prfillset (&signals); |
2786 | ||
2787 | for (signo = 0; signo < NSIG; signo++) | |
2788 | { | |
2ea28649 | 2789 | int target_signo = gdb_signal_from_host (signo); |
adc6a863 | 2790 | if (target_signo < pass_signals.size () && pass_signals[target_signo]) |
44122162 | 2791 | prdelset (&signals, signo); |
2455069d UW |
2792 | } |
2793 | ||
2794 | if (!proc_set_traced_signals (pi, &signals)) | |
2795 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 2796 | } |
c906108c | 2797 | |
77382aee | 2798 | /* Print status information about the child process. */ |
c906108c | 2799 | |
f6ac5f3d PA |
2800 | void |
2801 | procfs_target::files_info () | |
c3f6f71d | 2802 | { |
181e7f93 | 2803 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 2804 | |
a3f17187 | 2805 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 2806 | inf->attach_flag? "attached": "child", |
a068643d | 2807 | target_pid_to_str (inferior_ptid).c_str ()); |
c3f6f71d | 2808 | } |
c906108c | 2809 | |
77382aee PA |
2810 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
2811 | should only be applied to the real process, not to an LWP, because | |
2812 | of the check for parent-process. If we need this to work for an | |
2813 | LWP, it needs some more logic. */ | |
c906108c | 2814 | |
c3f6f71d | 2815 | static void |
fba45db2 | 2816 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
2817 | { |
2818 | int parent_pid; | |
c906108c | 2819 | |
c3f6f71d | 2820 | parent_pid = proc_parent_pid (pi); |
c3f6f71d | 2821 | if (!proc_kill (pi, SIGKILL)) |
103b3ef5 | 2822 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d | 2823 | destroy_procinfo (pi); |
c906108c | 2824 | |
c3f6f71d JM |
2825 | /* If pi is GDB's child, wait for it to die. */ |
2826 | if (parent_pid == getpid ()) | |
19958708 | 2827 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
2828 | Should we check the returned event? */ |
2829 | { | |
0d06e24b | 2830 | #if 0 |
c3f6f71d | 2831 | int status, ret; |
c906108c | 2832 | |
c3f6f71d JM |
2833 | ret = waitpid (pi->pid, &status, 0); |
2834 | #else | |
2835 | wait (NULL); | |
2836 | #endif | |
2837 | } | |
2838 | } | |
c906108c | 2839 | |
77382aee PA |
2840 | /* We're done debugging it, and we want it to go away. Then we want |
2841 | GDB to forget all about it. */ | |
c906108c | 2842 | |
f6ac5f3d PA |
2843 | void |
2844 | procfs_target::kill () | |
c906108c | 2845 | { |
d7e15655 | 2846 | if (inferior_ptid != null_ptid) /* ? */ |
c3f6f71d | 2847 | { |
0df8b418 | 2848 | /* Find procinfo for main process. */ |
e99b03dc | 2849 | procinfo *pi = find_procinfo (inferior_ptid.pid (), 0); |
c906108c | 2850 | |
c3f6f71d JM |
2851 | if (pi) |
2852 | unconditionally_kill_inferior (pi); | |
bc1e6c81 | 2853 | target_mourn_inferior (inferior_ptid); |
c906108c | 2854 | } |
c3f6f71d JM |
2855 | } |
2856 | ||
77382aee | 2857 | /* Forget we ever debugged this thing! */ |
c906108c | 2858 | |
f6ac5f3d PA |
2859 | void |
2860 | procfs_target::mourn_inferior () | |
c3f6f71d JM |
2861 | { |
2862 | procinfo *pi; | |
c906108c | 2863 | |
d7e15655 | 2864 | if (inferior_ptid != null_ptid) |
c3f6f71d | 2865 | { |
0df8b418 | 2866 | /* Find procinfo for main process. */ |
e99b03dc | 2867 | pi = find_procinfo (inferior_ptid.pid (), 0); |
c3f6f71d JM |
2868 | if (pi) |
2869 | destroy_procinfo (pi); | |
c906108c | 2870 | } |
6a3cb8e8 PA |
2871 | |
2872 | generic_mourn_inferior (); | |
8181d85f | 2873 | |
f6ac5f3d | 2874 | maybe_unpush_target (); |
c3f6f71d | 2875 | } |
c906108c | 2876 | |
77382aee PA |
2877 | /* When GDB forks to create a runnable inferior process, this function |
2878 | is called on the parent side of the fork. It's job is to do | |
2879 | whatever is necessary to make the child ready to be debugged, and | |
2880 | then wait for the child to synchronize. */ | |
c906108c | 2881 | |
19958708 | 2882 | static void |
28439f5e | 2883 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
2884 | { |
2885 | procinfo *pi; | |
c3f6f71d | 2886 | int fail; |
2689673f | 2887 | int lwpid; |
c906108c | 2888 | |
c3f6f71d JM |
2889 | /* This routine called on the parent side (GDB side) |
2890 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
2891 | if (!target_is_pushed (ops)) |
2892 | push_target (ops); | |
c906108c | 2893 | |
c475f569 RO |
2894 | pi = create_procinfo (pid, 0); |
2895 | if (pi == NULL) | |
9b20d036 | 2896 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
2897 | |
2898 | if (!open_procinfo_files (pi, FD_CTL)) | |
2899 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
2900 | ||
2901 | /* | |
2902 | xmalloc // done | |
2903 | open_procinfo_files // done | |
2904 | link list // done | |
2905 | prfillset (trace) | |
2906 | procfs_notice_signals | |
2907 | prfillset (fault) | |
2908 | prdelset (FLTPAGE) | |
2909 | PIOCWSTOP | |
2910 | PIOCSFAULT | |
2911 | */ | |
2912 | ||
77382aee | 2913 | /* If not stopped yet, wait for it to stop. */ |
c475f569 | 2914 | if (!(proc_flags (pi) & PR_STOPPED) && !(proc_wait_for_stop (pi))) |
c3f6f71d JM |
2915 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); |
2916 | ||
2917 | /* Save some of the /proc state to be restored if we detach. */ | |
2918 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 2919 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
2920 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
2921 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
2922 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2923 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
2924 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2925 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 2926 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 2927 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 2928 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2929 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
2930 | ||
c475f569 RO |
2931 | fail = procfs_debug_inferior (pi); |
2932 | if (fail != 0) | |
c3f6f71d JM |
2933 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); |
2934 | ||
0d06e24b JM |
2935 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
2936 | and possibly even turning ON kill-on-last-close at this point. But | |
2937 | I can't make that change without careful testing which I don't have | |
2938 | time to do right now... */ | |
c3f6f71d JM |
2939 | /* Turn on run-on-last-close flag so that the child |
2940 | will die if GDB goes away for some reason. */ | |
2941 | if (!proc_set_run_on_last_close (pi)) | |
2942 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
2943 | ||
2689673f PA |
2944 | /* We now have have access to the lwpid of the main thread/lwp. */ |
2945 | lwpid = proc_get_current_thread (pi); | |
2946 | ||
2947 | /* Create a procinfo for the main lwp. */ | |
2948 | create_procinfo (pid, lwpid); | |
2949 | ||
2950 | /* We already have a main thread registered in the thread table at | |
2951 | this point, but it didn't have any lwp info yet. Notify the core | |
2952 | about it. This changes inferior_ptid as well. */ | |
f2907e49 | 2953 | thread_change_ptid (ptid_t (pid), |
fd79271b | 2954 | ptid_t (pid, lwpid, 0)); |
c906108c | 2955 | |
2090129c | 2956 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c3f6f71d | 2957 | } |
c906108c | 2958 | |
77382aee PA |
2959 | /* When GDB forks to create a new process, this function is called on |
2960 | the child side of the fork before GDB exec's the user program. Its | |
2961 | job is to make the child minimally debuggable, so that the parent | |
2962 | GDB process can connect to the child and take over. This function | |
2963 | should do only the minimum to make that possible, and to | |
2964 | synchronize with the parent process. The parent process should | |
2965 | take care of the details. */ | |
c3f6f71d JM |
2966 | |
2967 | static void | |
fba45db2 | 2968 | procfs_set_exec_trap (void) |
c3f6f71d JM |
2969 | { |
2970 | /* This routine called on the child side (inferior side) | |
2971 | after GDB forks the inferior. It must use only local variables, | |
2972 | because it may be sharing data space with its parent. */ | |
c906108c | 2973 | |
c3f6f71d | 2974 | procinfo *pi; |
37de36c6 | 2975 | sysset_t *exitset; |
c906108c | 2976 | |
c475f569 RO |
2977 | pi = create_procinfo (getpid (), 0); |
2978 | if (pi == NULL) | |
e2e0b3e5 | 2979 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 2980 | |
c3f6f71d JM |
2981 | if (open_procinfo_files (pi, FD_CTL) == 0) |
2982 | { | |
2983 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
2984 | gdb_flush (gdb_stderr); | |
77382aee PA |
2985 | /* No need to call "dead_procinfo", because we're going to |
2986 | exit. */ | |
c3f6f71d JM |
2987 | _exit (127); |
2988 | } | |
c906108c | 2989 | |
44122162 | 2990 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
2991 | /* GW: Rationale... |
2992 | Not all systems with /proc have all the exec* syscalls with the same | |
2993 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 2994 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 2995 | |
c475f569 | 2996 | exitset = XNEW (sysset_t); |
44122162 | 2997 | premptyset (exitset); |
c3f6f71d | 2998 | #ifdef SYS_exec |
44122162 | 2999 | praddset (exitset, SYS_exec); |
c906108c | 3000 | #endif |
44122162 | 3001 | praddset (exitset, SYS_execve); |
37de36c6 KB |
3002 | |
3003 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 3004 | { |
c3f6f71d JM |
3005 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
3006 | gdb_flush (gdb_stderr); | |
3007 | _exit (127); | |
c906108c | 3008 | } |
c3f6f71d | 3009 | |
0df8b418 | 3010 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
3011 | /* Turn off inherit on fork flag so that all grand-children |
3012 | of gdb start with tracing flags cleared. */ | |
3013 | if (!proc_unset_inherit_on_fork (pi)) | |
3014 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
3015 | ||
3016 | /* Turn off run on last close flag, so that the child process | |
3017 | cannot run away just because we close our handle on it. | |
3018 | We want it to wait for the parent to attach. */ | |
3019 | if (!proc_unset_run_on_last_close (pi)) | |
3020 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
3021 | ||
19958708 | 3022 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 3023 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 3024 | /*destroy_procinfo (pi);*/ |
c906108c | 3025 | } |
c906108c | 3026 | |
77382aee PA |
3027 | /* This function is called BEFORE gdb forks the inferior process. Its |
3028 | only real responsibility is to set things up for the fork, and tell | |
3029 | GDB which two functions to call after the fork (one for the parent, | |
3030 | and one for the child). | |
3031 | ||
3032 | This function does a complicated search for a unix shell program, | |
3033 | which it then uses to parse arguments and environment variables to | |
3034 | be sent to the child. I wonder whether this code could not be | |
3035 | abstracted out and shared with other unix targets such as | |
3036 | inf-ptrace? */ | |
c906108c | 3037 | |
f6ac5f3d PA |
3038 | void |
3039 | procfs_target::create_inferior (const char *exec_file, | |
3040 | const std::string &allargs, | |
3041 | char **env, int from_tty) | |
c906108c | 3042 | { |
974e6844 | 3043 | const char *shell_file = get_shell (); |
c906108c | 3044 | char *tryname; |
28439f5e PA |
3045 | int pid; |
3046 | ||
974e6844 | 3047 | if (strchr (shell_file, '/') == NULL) |
c906108c SS |
3048 | { |
3049 | ||
3050 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
3051 | just do this the normal way (via execlp, which operates by |
3052 | attempting an exec for each element of the PATH until it | |
3053 | finds one which succeeds), then there will be an exec for | |
3054 | each failed attempt, each of which will cause a PR_SYSEXIT | |
3055 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
3056 | for these failed execs with the ones for successful execs | |
3057 | (whether the exec has succeeded is stored at that time in the | |
3058 | carry bit or some such architecture-specific and | |
3059 | non-ABI-specified place). | |
3060 | ||
3061 | So I can't think of anything better than to search the PATH | |
3062 | now. This has several disadvantages: (1) There is a race | |
3063 | condition; if we find a file now and it is deleted before we | |
3064 | exec it, we lose, even if the deletion leaves a valid file | |
3065 | further down in the PATH, (2) there is no way to know exactly | |
3066 | what an executable (in the sense of "capable of being | |
3067 | exec'd") file is. Using access() loses because it may lose | |
3068 | if the caller is the superuser; failing to use it loses if | |
3069 | there are ACLs or some such. */ | |
c906108c | 3070 | |
995816ba PA |
3071 | const char *p; |
3072 | const char *p1; | |
c906108c | 3073 | /* FIXME-maybe: might want "set path" command so user can change what |
c3f6f71d | 3074 | path is used from within GDB. */ |
995816ba | 3075 | const char *path = getenv ("PATH"); |
c906108c SS |
3076 | int len; |
3077 | struct stat statbuf; | |
3078 | ||
3079 | if (path == NULL) | |
3080 | path = "/bin:/usr/bin"; | |
3081 | ||
b196bc4c | 3082 | tryname = (char *) alloca (strlen (path) + strlen (shell_file) + 2); |
c3f6f71d | 3083 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
3084 | { |
3085 | p1 = strchr (p, ':'); | |
3086 | if (p1 != NULL) | |
3087 | len = p1 - p; | |
3088 | else | |
3089 | len = strlen (p); | |
3090 | strncpy (tryname, p, len); | |
3091 | tryname[len] = '\0'; | |
3092 | strcat (tryname, "/"); | |
3093 | strcat (tryname, shell_file); | |
3094 | if (access (tryname, X_OK) < 0) | |
3095 | continue; | |
3096 | if (stat (tryname, &statbuf) < 0) | |
3097 | continue; | |
3098 | if (!S_ISREG (statbuf.st_mode)) | |
3099 | /* We certainly need to reject directories. I'm not quite | |
3100 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
3101 | that people want to exec() these things. */ | |
3102 | continue; | |
3103 | break; | |
3104 | } | |
3105 | if (p == NULL) | |
3106 | /* Not found. This must be an error rather than merely passing | |
3107 | the file to execlp(), because execlp() would try all the | |
3108 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 3109 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 3110 | __LINE__, shell_file); |
c906108c SS |
3111 | |
3112 | shell_file = tryname; | |
3113 | } | |
3114 | ||
28439f5e | 3115 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 3116 | NULL, NULL, shell_file, NULL); |
28439f5e | 3117 | |
2090129c SDJ |
3118 | /* We have something that executes now. We'll be running through |
3119 | the shell at this point (if startup-with-shell is true), but the | |
3120 | pid shouldn't change. */ | |
f2907e49 | 3121 | add_thread_silent (ptid_t (pid)); |
2090129c | 3122 | |
f6ac5f3d | 3123 | procfs_init_inferior (this, pid); |
27087a3d JB |
3124 | } |
3125 | ||
3126 | /* An observer for the "inferior_created" event. */ | |
c906108c | 3127 | |
27087a3d JB |
3128 | static void |
3129 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
3130 | { | |
c906108c SS |
3131 | } |
3132 | ||
e8032dde | 3133 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 3134 | |
c3f6f71d | 3135 | static int |
fba45db2 | 3136 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 3137 | { |
fd79271b | 3138 | ptid_t gdb_threadid = ptid_t (pi->pid, thread->tid, 0); |
c906108c | 3139 | |
24bce9bb PA |
3140 | thread_info *thr = find_thread_ptid (gdb_threadid); |
3141 | if (thr == NULL || thr->state == THREAD_EXITED) | |
c3f6f71d | 3142 | add_thread (gdb_threadid); |
c906108c | 3143 | |
c3f6f71d JM |
3144 | return 0; |
3145 | } | |
3146 | ||
77382aee PA |
3147 | /* Query all the threads that the target knows about, and give them |
3148 | back to GDB to add to its list. */ | |
c3f6f71d | 3149 | |
f6ac5f3d PA |
3150 | void |
3151 | procfs_target::update_thread_list () | |
c3f6f71d JM |
3152 | { |
3153 | procinfo *pi; | |
3154 | ||
e8032dde PA |
3155 | prune_threads (); |
3156 | ||
0df8b418 | 3157 | /* Find procinfo for main process. */ |
e99b03dc | 3158 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d JM |
3159 | proc_update_threads (pi); |
3160 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
3161 | } |
3162 | ||
77382aee PA |
3163 | /* Return true if the thread is still 'alive'. This guy doesn't |
3164 | really seem to be doing his job. Got to investigate how to tell | |
3165 | when a thread is really gone. */ | |
c906108c | 3166 | |
57810aa7 | 3167 | bool |
f6ac5f3d | 3168 | procfs_target::thread_alive (ptid_t ptid) |
c906108c | 3169 | { |
c3f6f71d JM |
3170 | int proc, thread; |
3171 | procinfo *pi; | |
c906108c | 3172 | |
e99b03dc | 3173 | proc = ptid.pid (); |
e38504b3 | 3174 | thread = ptid.lwp (); |
0df8b418 | 3175 | /* If I don't know it, it ain't alive! */ |
c475f569 RO |
3176 | pi = find_procinfo (proc, thread); |
3177 | if (pi == NULL) | |
57810aa7 | 3178 | return false; |
c3f6f71d JM |
3179 | |
3180 | /* If I can't get its status, it ain't alive! | |
3181 | What's more, I need to forget about it! */ | |
3182 | if (!proc_get_status (pi)) | |
3183 | { | |
3184 | destroy_procinfo (pi); | |
57810aa7 | 3185 | return false; |
c3f6f71d | 3186 | } |
77382aee PA |
3187 | /* I couldn't have got its status if it weren't alive, so it's |
3188 | alive. */ | |
57810aa7 | 3189 | return true; |
c906108c | 3190 | } |
c3f6f71d | 3191 | |
a068643d | 3192 | /* Convert PTID to a string. */ |
c3f6f71d | 3193 | |
a068643d | 3194 | std::string |
f6ac5f3d | 3195 | procfs_target::pid_to_str (ptid_t ptid) |
c3f6f71d | 3196 | { |
e38504b3 | 3197 | if (ptid.lwp () == 0) |
a068643d | 3198 | return string_printf ("process %d", ptid.pid ()); |
c3f6f71d | 3199 | else |
a068643d | 3200 | return string_printf ("LWP %ld", ptid.lwp ()); |
c3f6f71d JM |
3201 | } |
3202 | ||
4206c05e RO |
3203 | /* Accepts an integer PID; Returns a string representing a file that |
3204 | can be opened to get the symbols for the child process. */ | |
3205 | ||
3206 | char * | |
3207 | procfs_target::pid_to_exec_file (int pid) | |
3208 | { | |
3209 | static char buf[PATH_MAX]; | |
3210 | char name[PATH_MAX]; | |
3211 | ||
3212 | /* Solaris 11 introduced /proc/<proc-id>/execname. */ | |
c475f569 | 3213 | xsnprintf (name, sizeof (name), "/proc/%d/execname", pid); |
4206c05e RO |
3214 | scoped_fd fd (gdb_open_cloexec (name, O_RDONLY, 0)); |
3215 | if (fd.get () < 0 || read (fd.get (), buf, PATH_MAX - 1) < 0) | |
3216 | { | |
3217 | /* If that fails, fall back to /proc/<proc-id>/path/a.out introduced in | |
3218 | Solaris 10. */ | |
3219 | ssize_t len; | |
3220 | ||
c475f569 | 3221 | xsnprintf (name, sizeof (name), "/proc/%d/path/a.out", pid); |
4206c05e RO |
3222 | len = readlink (name, buf, PATH_MAX - 1); |
3223 | if (len <= 0) | |
3224 | strcpy (buf, name); | |
3225 | else | |
3226 | buf[len] = '\0'; | |
3227 | } | |
3228 | ||
3229 | return buf; | |
3230 | } | |
3231 | ||
77382aee | 3232 | /* Insert a watchpoint. */ |
c3f6f71d | 3233 | |
a0911fd0 | 3234 | static int |
39f77062 | 3235 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 3236 | int after) |
c906108c | 3237 | { |
c3f6f71d | 3238 | int pflags = 0; |
19958708 | 3239 | procinfo *pi; |
c3f6f71d | 3240 | |
e99b03dc TT |
3241 | pi = find_procinfo_or_die (ptid.pid () == -1 ? |
3242 | inferior_ptid.pid () : ptid.pid (), | |
dfd4cc63 | 3243 | 0); |
c3f6f71d | 3244 | |
0df8b418 MS |
3245 | /* Translate from GDB's flags to /proc's. */ |
3246 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 3247 | { |
0df8b418 | 3248 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
3249 | case hw_write: /* default watchpoint (write) */ |
3250 | pflags = WRITE_WATCHFLAG; | |
3251 | break; | |
3252 | case hw_read: /* read watchpoint */ | |
3253 | pflags = READ_WATCHFLAG; | |
3254 | break; | |
3255 | case hw_access: /* access watchpoint */ | |
3256 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
3257 | break; | |
3258 | case hw_execute: /* execution HW breakpoint */ | |
3259 | pflags = EXEC_WATCHFLAG; | |
3260 | break; | |
0df8b418 | 3261 | default: /* Something weird. Return error. */ |
c906108c | 3262 | return -1; |
c3f6f71d | 3263 | } |
0df8b418 | 3264 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
3265 | pflags |= AFTER_WATCHFLAG; |
3266 | } | |
3267 | ||
3268 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
3269 | { | |
0df8b418 | 3270 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
3271 | return -1; /* fail */ |
3272 | /* GDB may try to remove the same watchpoint twice. | |
3273 | If a remove request returns no match, don't error. */ | |
c906108c | 3274 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
3275 | return 0; /* ignore */ |
3276 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c SS |
3277 | } |
3278 | return 0; | |
3279 | } | |
3280 | ||
1e03ad20 KB |
3281 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
3282 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
3283 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
3284 | far. | |
19958708 | 3285 | |
1e03ad20 KB |
3286 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
3287 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 3288 | target_can_use_hardware_watchpoint. */ |
1e03ad20 | 3289 | |
f6ac5f3d PA |
3290 | int |
3291 | procfs_target::can_use_hw_breakpoint (enum bptype type, int cnt, int othertype) | |
1e03ad20 | 3292 | { |
1e03ad20 KB |
3293 | /* Due to the way that proc_set_watchpoint() is implemented, host |
3294 | and target pointers must be of the same size. If they are not, | |
3295 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
3296 | fact that proc_set_watchpoint() calls |
3297 | procfs_address_to_host_pointer(); a close inspection of | |
3298 | procfs_address_to_host_pointer will reveal that an internal error | |
3299 | will be generated when the host and target pointer sizes are | |
3300 | different. */ | |
f5656ead | 3301 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 3302 | |
4e906f53 | 3303 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
3304 | return 0; |
3305 | ||
3306 | /* Other tests here??? */ | |
3307 | ||
3308 | return 1; | |
1e03ad20 KB |
3309 | } |
3310 | ||
77382aee PA |
3311 | /* Returns non-zero if process is stopped on a hardware watchpoint |
3312 | fault, else returns zero. */ | |
c3f6f71d | 3313 | |
57810aa7 | 3314 | bool |
f6ac5f3d | 3315 | procfs_target::stopped_by_watchpoint () |
c906108c | 3316 | { |
c3f6f71d | 3317 | procinfo *pi; |
c906108c | 3318 | |
e99b03dc | 3319 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
aaeb7efa | 3320 | |
c3f6f71d | 3321 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c475f569 RO |
3322 | if (proc_why (pi) == PR_FAULTED) |
3323 | if (proc_what (pi) == FLTWATCH) | |
3324 | return true; | |
57810aa7 | 3325 | return false; |
c906108c | 3326 | } |
c906108c | 3327 | |
77382aee PA |
3328 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
3329 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
3330 | address. This function is only called if | |
3331 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
3332 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c | 3333 | |
57810aa7 | 3334 | bool |
f6ac5f3d | 3335 | procfs_target::stopped_data_address (CORE_ADDR *addr) |
bf701c2c PM |
3336 | { |
3337 | procinfo *pi; | |
3338 | ||
e99b03dc | 3339 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
bf701c2c PM |
3340 | return proc_watchpoint_address (pi, addr); |
3341 | } | |
3342 | ||
f6ac5f3d PA |
3343 | int |
3344 | procfs_target::insert_watchpoint (CORE_ADDR addr, int len, | |
3345 | enum target_hw_bp_type type, | |
3346 | struct expression *cond) | |
25513619 | 3347 | { |
d92524f1 | 3348 | if (!target_have_steppable_watchpoint |
f5656ead | 3349 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
c475f569 RO |
3350 | /* When a hardware watchpoint fires off the PC will be left at |
3351 | the instruction following the one which caused the | |
3352 | watchpoint. It will *NOT* be necessary for GDB to step over | |
3353 | the watchpoint. */ | |
3354 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
25513619 | 3355 | else |
c475f569 RO |
3356 | /* When a hardware watchpoint fires off the PC will be left at |
3357 | the instruction which caused the watchpoint. It will be | |
3358 | necessary for GDB to step over the watchpoint. */ | |
3359 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
25513619 PA |
3360 | } |
3361 | ||
f6ac5f3d PA |
3362 | int |
3363 | procfs_target::remove_watchpoint (CORE_ADDR addr, int len, | |
3364 | enum target_hw_bp_type type, | |
3365 | struct expression *cond) | |
25513619 PA |
3366 | { |
3367 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
3368 | } | |
3369 | ||
f6ac5f3d PA |
3370 | int |
3371 | procfs_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
25513619 PA |
3372 | { |
3373 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
3374 | system can support "thousands" of hardware watchpoints, but gives | |
3375 | no method for finding out how many; It doesn't say anything about | |
3376 | the allowed size for the watched area either. So we just tell | |
3377 | GDB 'yes'. */ | |
3378 | return 1; | |
3379 | } | |
3380 | ||
77382aee PA |
3381 | /* Memory Mappings Functions: */ |
3382 | ||
3383 | /* Call a callback function once for each mapping, passing it the | |
3384 | mapping, an optional secondary callback function, and some optional | |
3385 | opaque data. Quit and return the first non-zero value returned | |
3386 | from the callback. | |
3387 | ||
3388 | PI is the procinfo struct for the process to be mapped. FUNC is | |
3389 | the callback function to be called by this iterator. DATA is the | |
3390 | optional opaque data to be passed to the callback function. | |
3391 | CHILD_FUNC is the optional secondary function pointer to be passed | |
3392 | to the child function. Returns the first non-zero return value | |
3393 | from the callback function, or zero. */ | |
831e682e MS |
3394 | |
3395 | static int | |
b8edc417 | 3396 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 3397 | void *data, |
19958708 | 3398 | int (*func) (struct prmap *map, |
b8edc417 | 3399 | find_memory_region_ftype child_func, |
831e682e MS |
3400 | void *data)) |
3401 | { | |
3402 | char pathname[MAX_PROC_NAME_SIZE]; | |
3403 | struct prmap *prmaps; | |
3404 | struct prmap *prmap; | |
3405 | int funcstat; | |
831e682e | 3406 | int nmap; |
831e682e | 3407 | struct stat sbuf; |
831e682e | 3408 | |
19958708 | 3409 | /* Get the number of mappings, allocate space, |
831e682e | 3410 | and read the mappings into prmaps. */ |
0df8b418 | 3411 | /* Open map fd. */ |
c475f569 | 3412 | xsnprintf (pathname, sizeof (pathname), "/proc/%d/map", pi->pid); |
831e682e | 3413 | |
5dc1a704 TT |
3414 | scoped_fd map_fd (open (pathname, O_RDONLY)); |
3415 | if (map_fd.get () < 0) | |
3416 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
831e682e | 3417 | |
19958708 | 3418 | /* Use stat to determine the file size, and compute |
831e682e | 3419 | the number of prmap_t objects it contains. */ |
5dc1a704 | 3420 | if (fstat (map_fd.get (), &sbuf) != 0) |
831e682e MS |
3421 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); |
3422 | ||
3423 | nmap = sbuf.st_size / sizeof (prmap_t); | |
3424 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5dc1a704 | 3425 | if (read (map_fd.get (), (char *) prmaps, nmap * sizeof (*prmaps)) |
831e682e MS |
3426 | != (nmap * sizeof (*prmaps))) |
3427 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
831e682e MS |
3428 | |
3429 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
c475f569 RO |
3430 | { |
3431 | funcstat = (*func) (prmap, child_func, data); | |
3432 | if (funcstat != 0) | |
3433 | return funcstat; | |
3434 | } | |
831e682e MS |
3435 | |
3436 | return 0; | |
3437 | } | |
3438 | ||
77382aee | 3439 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 3440 | function for each memory region. |
77382aee | 3441 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
3442 | |
3443 | static int | |
19958708 | 3444 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 3445 | find_memory_region_ftype func, void *data) |
be4d1333 | 3446 | { |
bf75638e | 3447 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 3448 | map->pr_size, |
be4d1333 MS |
3449 | (map->pr_mflags & MA_READ) != 0, |
3450 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 3451 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 3452 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
3453 | data); |
3454 | } | |
3455 | ||
77382aee PA |
3456 | /* External interface. Calls a callback function once for each |
3457 | mapped memory region in the child process, passing as arguments: | |
3458 | ||
3459 | CORE_ADDR virtual_address, | |
3460 | unsigned long size, | |
3461 | int read, TRUE if region is readable by the child | |
3462 | int write, TRUE if region is writable by the child | |
3463 | int execute TRUE if region is executable by the child. | |
3464 | ||
3465 | Stops iterating and returns the first non-zero value returned by | |
3466 | the callback. */ | |
be4d1333 | 3467 | |
f6ac5f3d PA |
3468 | int |
3469 | procfs_target::find_memory_regions (find_memory_region_ftype func, void *data) | |
be4d1333 | 3470 | { |
e99b03dc | 3471 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
be4d1333 | 3472 | |
19958708 | 3473 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
3474 | find_memory_regions_callback); |
3475 | } | |
3476 | ||
77382aee | 3477 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 3478 | |
388faa48 | 3479 | static char * |
5ae5f592 | 3480 | mappingflags (long flags) |
388faa48 MS |
3481 | { |
3482 | static char asciiflags[8]; | |
3483 | ||
3484 | strcpy (asciiflags, "-------"); | |
388faa48 MS |
3485 | if (flags & MA_STACK) |
3486 | asciiflags[1] = 's'; | |
3487 | if (flags & MA_BREAK) | |
3488 | asciiflags[2] = 'b'; | |
3489 | if (flags & MA_SHARED) | |
3490 | asciiflags[3] = 's'; | |
3491 | if (flags & MA_READ) | |
3492 | asciiflags[4] = 'r'; | |
3493 | if (flags & MA_WRITE) | |
3494 | asciiflags[5] = 'w'; | |
3495 | if (flags & MA_EXEC) | |
3496 | asciiflags[6] = 'x'; | |
3497 | return (asciiflags); | |
3498 | } | |
3499 | ||
77382aee PA |
3500 | /* Callback function, does the actual work for 'info proc |
3501 | mappings'. */ | |
831e682e | 3502 | |
831e682e | 3503 | static int |
b8edc417 | 3504 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 3505 | void *unused) |
831e682e | 3506 | { |
0b62613e | 3507 | unsigned int pr_off; |
831e682e | 3508 | |
0b62613e | 3509 | pr_off = (unsigned int) map->pr_offset; |
0b62613e | 3510 | |
f5656ead | 3511 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 3512 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
3513 | (unsigned long) map->pr_vaddr, |
3514 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3515 | (unsigned long) map->pr_size, |
0b62613e PA |
3516 | pr_off, |
3517 | mappingflags (map->pr_mflags)); | |
3518 | else | |
f6a96b83 | 3519 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
3520 | (unsigned long) map->pr_vaddr, |
3521 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3522 | (unsigned long) map->pr_size, |
0b62613e PA |
3523 | pr_off, |
3524 | mappingflags (map->pr_mflags)); | |
831e682e MS |
3525 | |
3526 | return 0; | |
3527 | } | |
3528 | ||
77382aee | 3529 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
3530 | |
3531 | static void | |
3532 | info_proc_mappings (procinfo *pi, int summary) | |
3533 | { | |
388faa48 | 3534 | if (summary) |
0df8b418 | 3535 | return; /* No output for summary mode. */ |
388faa48 | 3536 | |
a3f17187 | 3537 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 3538 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
3539 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
3540 | "Start Addr", | |
3541 | " End Addr", | |
3542 | " Size", | |
3543 | " Offset", | |
3544 | "Flags"); | |
3545 | else | |
3546 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3547 | "Start Addr", | |
3548 | " End Addr", | |
3549 | " Size", | |
3550 | " Offset", | |
3551 | "Flags"); | |
388faa48 | 3552 | |
831e682e | 3553 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
3554 | printf_filtered ("\n"); |
3555 | } | |
3556 | ||
77382aee | 3557 | /* Implement the "info proc" command. */ |
c3f6f71d | 3558 | |
f6ac5f3d PA |
3559 | bool |
3560 | procfs_target::info_proc (const char *args, enum info_proc_what what) | |
c906108c | 3561 | { |
388faa48 MS |
3562 | procinfo *process = NULL; |
3563 | procinfo *thread = NULL; | |
388faa48 MS |
3564 | char *tmp = NULL; |
3565 | int pid = 0; | |
3566 | int tid = 0; | |
3567 | int mappings = 0; | |
c906108c | 3568 | |
145b16a9 UW |
3569 | switch (what) |
3570 | { | |
3571 | case IP_MINIMAL: | |
3572 | break; | |
3573 | ||
3574 | case IP_MAPPINGS: | |
3575 | case IP_ALL: | |
3576 | mappings = 1; | |
3577 | break; | |
3578 | ||
3579 | default: | |
3580 | error (_("Not supported on this target.")); | |
3581 | } | |
3582 | ||
773a1edc | 3583 | gdb_argv built_argv (args); |
4fa7574e | 3584 | for (char *arg : built_argv) |
c3f6f71d | 3585 | { |
773a1edc | 3586 | if (isdigit (arg[0])) |
c3f6f71d | 3587 | { |
773a1edc | 3588 | pid = strtoul (arg, &tmp, 10); |
c3f6f71d JM |
3589 | if (*tmp == '/') |
3590 | tid = strtoul (++tmp, NULL, 10); | |
3591 | } | |
773a1edc | 3592 | else if (arg[0] == '/') |
c3f6f71d | 3593 | { |
773a1edc | 3594 | tid = strtoul (arg + 1, NULL, 10); |
c3f6f71d | 3595 | } |
c3f6f71d | 3596 | } |
5b4cbbe3 TT |
3597 | |
3598 | procinfo_up temporary_procinfo; | |
c3f6f71d | 3599 | if (pid == 0) |
e99b03dc | 3600 | pid = inferior_ptid.pid (); |
c3f6f71d | 3601 | if (pid == 0) |
8a3fe4f8 | 3602 | error (_("No current process: you must name one.")); |
c3f6f71d | 3603 | else |
c906108c | 3604 | { |
c3f6f71d | 3605 | /* Have pid, will travel. |
0df8b418 | 3606 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
3607 | process = find_procinfo (pid, 0); |
3608 | if (process == NULL) | |
3609 | { | |
19958708 | 3610 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
3611 | remember to close it again when finished. */ |
3612 | process = create_procinfo (pid, 0); | |
5b4cbbe3 | 3613 | temporary_procinfo.reset (process); |
c3f6f71d JM |
3614 | if (!open_procinfo_files (process, FD_CTL)) |
3615 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
3616 | } | |
c906108c | 3617 | } |
c3f6f71d JM |
3618 | if (tid != 0) |
3619 | thread = create_procinfo (pid, tid); | |
3620 | ||
3621 | if (process) | |
3622 | { | |
a3f17187 | 3623 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
3624 | proc_prettyprint_flags (proc_flags (process), 1); |
3625 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
3626 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
3627 | if (proc_get_nthreads (process) > 1) | |
19958708 | 3628 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
3629 | proc_get_nthreads (process)); |
3630 | } | |
3631 | if (thread) | |
3632 | { | |
a3f17187 | 3633 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
3634 | proc_prettyprint_flags (proc_flags (thread), 1); |
3635 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
3636 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
3637 | } | |
3638 | ||
388faa48 | 3639 | if (mappings) |
c475f569 | 3640 | info_proc_mappings (process, 0); |
388faa48 | 3641 | |
f6ac5f3d | 3642 | return true; |
c906108c SS |
3643 | } |
3644 | ||
9185ddce JB |
3645 | /* Modify the status of the system call identified by SYSCALLNUM in |
3646 | the set of syscalls that are currently traced/debugged. | |
3647 | ||
3648 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 3649 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 3650 | |
0df8b418 | 3651 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
3652 | will be disabled. */ |
3653 | ||
3654 | static void | |
3655 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 3656 | int mode, int from_tty) |
9185ddce JB |
3657 | { |
3658 | sysset_t *sysset; | |
77382aee | 3659 | |
9185ddce JB |
3660 | if (entry_or_exit == PR_SYSENTRY) |
3661 | sysset = proc_get_traced_sysentry (pi, NULL); | |
3662 | else | |
3663 | sysset = proc_get_traced_sysexit (pi, NULL); | |
3664 | ||
3665 | if (sysset == NULL) | |
3666 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
3667 | ||
3668 | if (mode == FLAG_SET) | |
44122162 | 3669 | praddset (sysset, syscallnum); |
9185ddce | 3670 | else |
44122162 | 3671 | prdelset (sysset, syscallnum); |
9185ddce JB |
3672 | |
3673 | if (entry_or_exit == PR_SYSENTRY) | |
3674 | { | |
3675 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 3676 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
3677 | } |
3678 | else | |
3679 | { | |
3680 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 3681 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
3682 | } |
3683 | } | |
3684 | ||
c3f6f71d | 3685 | static void |
0b39b52e | 3686 | proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 3687 | { |
c3f6f71d | 3688 | procinfo *pi; |
c906108c | 3689 | |
e99b03dc | 3690 | if (inferior_ptid.pid () <= 0) |
8a3fe4f8 | 3691 | error (_("you must be debugging a process to use this command.")); |
c906108c | 3692 | |
c3f6f71d | 3693 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 3694 | error_no_arg (_("system call to trace")); |
c3f6f71d | 3695 | |
e99b03dc | 3696 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d JM |
3697 | if (isdigit (args[0])) |
3698 | { | |
9185ddce | 3699 | const int syscallnum = atoi (args); |
c906108c | 3700 | |
9185ddce | 3701 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
3702 | } |
3703 | } | |
3704 | ||
19958708 | 3705 | static void |
0b39b52e | 3706 | proc_trace_sysentry_cmd (const char *args, int from_tty) |
c906108c | 3707 | { |
c3f6f71d JM |
3708 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
3709 | } | |
c906108c | 3710 | |
19958708 | 3711 | static void |
0b39b52e | 3712 | proc_trace_sysexit_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3713 | { |
3714 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 3715 | } |
c906108c | 3716 | |
19958708 | 3717 | static void |
0b39b52e | 3718 | proc_untrace_sysentry_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3719 | { |
3720 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
3721 | } | |
3722 | ||
19958708 | 3723 | static void |
0b39b52e | 3724 | proc_untrace_sysexit_cmd (const char *args, int from_tty) |
c906108c | 3725 | { |
c3f6f71d JM |
3726 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
3727 | } | |
c906108c | 3728 | |
c906108c | 3729 | void |
fba45db2 | 3730 | _initialize_procfs (void) |
c906108c | 3731 | { |
76727919 | 3732 | gdb::observers::inferior_created.attach (procfs_inferior_created); |
27087a3d | 3733 | |
19958708 | 3734 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 3735 | _("Give a trace of entries into the syscall.")); |
19958708 | 3736 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 3737 | _("Give a trace of exits from the syscall.")); |
19958708 | 3738 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 3739 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 3740 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 3741 | _("Cancel a trace of exits from the syscall.")); |
c1955e17 | 3742 | |
62c808ae | 3743 | add_inf_child_target (&the_procfs_target); |
c3f6f71d JM |
3744 | } |
3745 | ||
3746 | /* =================== END, GDB "MODULE" =================== */ | |
3747 | ||
3748 | ||
3749 | ||
77382aee PA |
3750 | /* miscellaneous stubs: */ |
3751 | ||
3752 | /* The following satisfy a few random symbols mostly created by the | |
3753 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 3754 | |
77382aee PA |
3755 | /* Return a pid for which we guarantee we will be able to find a |
3756 | 'live' procinfo. */ | |
c3f6f71d | 3757 | |
39f77062 | 3758 | ptid_t |
fba45db2 | 3759 | procfs_first_available (void) |
c3f6f71d | 3760 | { |
f2907e49 | 3761 | return ptid_t (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 3762 | } |
be4d1333 MS |
3763 | |
3764 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
3765 | ||
3766 | static char * | |
19958708 | 3767 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 3768 | char *note_data, int *note_size, |
2ea28649 | 3769 | enum gdb_signal stop_signal) |
be4d1333 | 3770 | { |
594f7785 | 3771 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
3772 | gdb_gregset_t gregs; |
3773 | gdb_fpregset_t fpregs; | |
3774 | unsigned long merged_pid; | |
3775 | ||
e38504b3 | 3776 | merged_pid = ptid.lwp () << 16 | ptid.pid (); |
be4d1333 | 3777 | |
75125405 DJ |
3778 | /* This part is the old method for fetching registers. |
3779 | It should be replaced by the newer one using regsets | |
3780 | once it is implemented in this platform: | |
29082443 | 3781 | gdbarch_iterate_over_regset_sections(). */ |
75125405 | 3782 | |
2989a365 | 3783 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
75125405 DJ |
3784 | inferior_ptid = ptid; |
3785 | target_fetch_registers (regcache, -1); | |
3786 | ||
594f7785 | 3787 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
3788 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
3789 | note_data, | |
3790 | note_size, | |
19958708 | 3791 | merged_pid, |
65554fef MS |
3792 | stop_signal, |
3793 | &gregs); | |
594f7785 | 3794 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
3795 | note_data = (char *) elfcore_write_prfpreg (obfd, |
3796 | note_data, | |
3797 | note_size, | |
3798 | &fpregs, | |
3799 | sizeof (fpregs)); | |
75125405 | 3800 | |
be4d1333 MS |
3801 | return note_data; |
3802 | } | |
3803 | ||
3804 | struct procfs_corefile_thread_data { | |
3805 | bfd *obfd; | |
3806 | char *note_data; | |
3807 | int *note_size; | |
2ea28649 | 3808 | enum gdb_signal stop_signal; |
be4d1333 MS |
3809 | }; |
3810 | ||
3811 | static int | |
65554fef | 3812 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 | 3813 | { |
b196bc4c RO |
3814 | struct procfs_corefile_thread_data *args |
3815 | = (struct procfs_corefile_thread_data *) data; | |
be4d1333 | 3816 | |
2689673f | 3817 | if (pi != NULL) |
be4d1333 | 3818 | { |
fd79271b | 3819 | ptid_t ptid = ptid_t (pi->pid, thread->tid, 0); |
f4a14ae6 | 3820 | |
75125405 | 3821 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 3822 | args->note_data, |
2020b7ab PA |
3823 | args->note_size, |
3824 | args->stop_signal); | |
be4d1333 MS |
3825 | } |
3826 | return 0; | |
3827 | } | |
3828 | ||
a223f1e7 JB |
3829 | static int |
3830 | find_signalled_thread (struct thread_info *info, void *data) | |
3831 | { | |
a493e3e2 | 3832 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
e99b03dc | 3833 | && info->ptid.pid () == inferior_ptid.pid ()) |
a223f1e7 JB |
3834 | return 1; |
3835 | ||
3836 | return 0; | |
3837 | } | |
3838 | ||
2ea28649 | 3839 | static enum gdb_signal |
a223f1e7 JB |
3840 | find_stop_signal (void) |
3841 | { | |
3842 | struct thread_info *info = | |
3843 | iterate_over_threads (find_signalled_thread, NULL); | |
3844 | ||
3845 | if (info) | |
16c381f0 | 3846 | return info->suspend.stop_signal; |
a223f1e7 | 3847 | else |
a493e3e2 | 3848 | return GDB_SIGNAL_0; |
a223f1e7 JB |
3849 | } |
3850 | ||
f6ac5f3d PA |
3851 | char * |
3852 | procfs_target::make_corefile_notes (bfd *obfd, int *note_size) | |
be4d1333 | 3853 | { |
be4d1333 | 3854 | gdb_gregset_t gregs; |
be4d1333 MS |
3855 | char fname[16] = {'\0'}; |
3856 | char psargs[80] = {'\0'}; | |
e99b03dc | 3857 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
be4d1333 | 3858 | char *note_data = NULL; |
cbaaa0ca | 3859 | const char *inf_args; |
be4d1333 | 3860 | struct procfs_corefile_thread_data thread_args; |
2ea28649 | 3861 | enum gdb_signal stop_signal; |
be4d1333 MS |
3862 | |
3863 | if (get_exec_file (0)) | |
3864 | { | |
9f37bbcc | 3865 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
3866 | fname[sizeof (fname) - 1] = 0; |
3867 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
3868 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
3869 | |
3870 | inf_args = get_inferior_args (); | |
c475f569 RO |
3871 | if (inf_args && *inf_args |
3872 | && (strlen (inf_args) | |
3873 | < ((int) sizeof (psargs) - (int) strlen (psargs)))) | |
be4d1333 | 3874 | { |
19958708 | 3875 | strncat (psargs, " ", |
be4d1333 | 3876 | sizeof (psargs) - strlen (psargs)); |
19958708 | 3877 | strncat (psargs, inf_args, |
be4d1333 MS |
3878 | sizeof (psargs) - strlen (psargs)); |
3879 | } | |
3880 | } | |
3881 | ||
19958708 RM |
3882 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
3883 | note_data, | |
3884 | note_size, | |
3885 | fname, | |
be4d1333 MS |
3886 | psargs); |
3887 | ||
651c8d2d PA |
3888 | stop_signal = find_stop_signal (); |
3889 | ||
3e3420f6 PA |
3890 | fill_gregset (get_current_regcache (), &gregs, -1); |
3891 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
e99b03dc | 3892 | inferior_ptid.pid (), |
3e3420f6 | 3893 | stop_signal, &gregs); |
3e3420f6 | 3894 | |
be4d1333 MS |
3895 | thread_args.obfd = obfd; |
3896 | thread_args.note_data = note_data; | |
3897 | thread_args.note_size = note_size; | |
651c8d2d | 3898 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
3899 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
3900 | &thread_args); | |
2689673f | 3901 | note_data = thread_args.note_data; |
be4d1333 | 3902 | |
62c808ae RO |
3903 | gdb::optional<gdb::byte_vector> auxv = |
3904 | target_read_alloc (current_top_target (), TARGET_OBJECT_AUXV, NULL); | |
3905 | if (auxv && !auxv->empty ()) | |
3906 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
3907 | "CORE", NT_AUXV, auxv->data (), | |
3908 | auxv->size ()); | |
4e73f23d | 3909 | |
be4d1333 MS |
3910 | return note_data; |
3911 | } | |
be4d1333 | 3912 | /* =================== END GCORE .NOTE "MODULE" =================== */ |