Commit | Line | Data |
---|---|---|
44122162 | 1 | /* Machine independent support for Solaris /proc (process file system) for GDB. |
2555fe1a | 2 | |
e2882c85 | 3 | Copyright (C) 1999-2018 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
45741a9c | 25 | #include "infrun.h" |
c3f6f71d JM |
26 | #include "target.h" |
27 | #include "gdbcore.h" | |
65554fef | 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 29 | #include "gdbcmd.h" |
0fda6bd2 | 30 | #include "gdbthread.h" |
7f7fe91e | 31 | #include "regcache.h" |
28439f5e | 32 | #include "inf-child.h" |
4fa7574e | 33 | #include "nat/fork-inferior.h" |
88fc5eb7 | 34 | #include "filestuff.h" |
c906108c | 35 | |
0df8b418 | 36 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c906108c | 37 | |
c3f6f71d JM |
38 | #include <sys/procfs.h> |
39 | #include <sys/fault.h> | |
40 | #include <sys/syscall.h> | |
2555fe1a | 41 | #include "gdb_wait.h" |
0fda6bd2 JM |
42 | #include <signal.h> |
43 | #include <ctype.h> | |
92107356 | 44 | #include "gdb_bfd.h" |
44270758 | 45 | #include "inflow.h" |
4e73f23d | 46 | #include "auxv.h" |
d1a7880c | 47 | #include "procfs.h" |
76727919 | 48 | #include "observable.h" |
5dc1a704 | 49 | #include "common/scoped_fd.h" |
0fda6bd2 | 50 | |
77382aee PA |
51 | /* This module provides the interface between GDB and the |
52 | /proc file system, which is used on many versions of Unix | |
53 | as a means for debuggers to control other processes. | |
54 | ||
77382aee PA |
55 | /proc works by imitating a file system: you open a simulated file |
56 | that represents the process you wish to interact with, and perform | |
57 | operations on that "file" in order to examine or change the state | |
58 | of the other process. | |
59 | ||
60 | The most important thing to know about /proc and this module is | |
61 | that there are two very different interfaces to /proc: | |
62 | ||
63 | One that uses the ioctl system call, and another that uses read | |
64 | and write system calls. | |
65 | ||
44122162 RO |
66 | This module supports only the Solaris version of the read/write |
67 | interface. */ | |
77382aee | 68 | |
c906108c | 69 | #include <sys/types.h> |
2978b111 | 70 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
c906108c | 71 | |
c3f6f71d JM |
72 | #include <fcntl.h> /* for O_RDONLY */ |
73 | #include <unistd.h> /* for "X_OK" */ | |
53ce3c39 | 74 | #include <sys/stat.h> /* for struct stat */ |
c906108c | 75 | |
103b3ef5 MS |
76 | /* Note: procfs-utils.h must be included after the above system header |
77 | files, because it redefines various system calls using macros. | |
78 | This may be incompatible with the prototype declarations. */ | |
79 | ||
103b3ef5 MS |
80 | #include "proc-utils.h" |
81 | ||
77382aee | 82 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
83 | #include "gregset.h" |
84 | ||
c3f6f71d | 85 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 86 | |
77382aee | 87 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 88 | |
f6ac5f3d | 89 | |
e96027e0 PA |
90 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
91 | const gdb_byte *, | |
92 | ULONGEST, ULONGEST, | |
93 | ULONGEST *); | |
a14ed312 | 94 | |
f6ac5f3d PA |
95 | class procfs_target final : public inf_child_target |
96 | { | |
97 | public: | |
98 | void create_inferior (const char *, const std::string &, | |
99 | char **, int) override; | |
100 | ||
101 | void kill () override; | |
102 | ||
103 | void mourn_inferior () override; | |
104 | ||
105 | void attach (const char *, int) override; | |
106 | void detach (inferior *inf, int) override; | |
107 | ||
108 | void resume (ptid_t, int, enum gdb_signal) override; | |
109 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
110 | ||
111 | void fetch_registers (struct regcache *, int) override; | |
112 | void store_registers (struct regcache *, int) override; | |
113 | ||
114 | enum target_xfer_status xfer_partial (enum target_object object, | |
115 | const char *annex, | |
116 | gdb_byte *readbuf, | |
117 | const gdb_byte *writebuf, | |
118 | ULONGEST offset, ULONGEST len, | |
119 | ULONGEST *xfered_len) override; | |
120 | ||
121 | void pass_signals (int, unsigned char *) override; | |
a14ed312 | 122 | |
f6ac5f3d | 123 | void files_info () override; |
c3f6f71d | 124 | |
f6ac5f3d | 125 | void update_thread_list () override; |
be4d1333 | 126 | |
57810aa7 | 127 | bool thread_alive (ptid_t ptid) override; |
be4d1333 | 128 | |
f6ac5f3d | 129 | const char *pid_to_str (ptid_t) override; |
1e03ad20 | 130 | |
4206c05e RO |
131 | char *pid_to_exec_file (int pid) override; |
132 | ||
f6ac5f3d PA |
133 | thread_control_capabilities get_thread_control_capabilities () override |
134 | { return tc_schedlock; } | |
145b16a9 | 135 | |
f6ac5f3d PA |
136 | /* find_memory_regions support method for gcore */ |
137 | int find_memory_regions (find_memory_region_ftype func, void *data) | |
138 | override; | |
b5c8fcb1 | 139 | |
f6ac5f3d | 140 | char *make_corefile_notes (bfd *, int *) override; |
b5c8fcb1 | 141 | |
f6ac5f3d PA |
142 | bool info_proc (const char *, enum info_proc_what) override; |
143 | ||
144 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
145 | int auxv_parse (gdb_byte **readptr, | |
146 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
147 | override; | |
148 | #endif | |
149 | ||
57810aa7 | 150 | bool stopped_by_watchpoint () override; |
f6ac5f3d PA |
151 | |
152 | int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
153 | struct expression *) override; | |
154 | ||
155 | int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
156 | struct expression *) override; | |
157 | ||
158 | int region_ok_for_hw_watchpoint (CORE_ADDR, int) override; | |
159 | ||
160 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
57810aa7 | 161 | bool stopped_data_address (CORE_ADDR *) override; |
f6ac5f3d | 162 | }; |
b5c8fcb1 | 163 | |
f6ac5f3d | 164 | static procfs_target the_procfs_target; |
b5c8fcb1 | 165 | |
c47ffbe3 | 166 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
167 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
168 | is presented in 64-bit format. We need to provide a custom parser | |
169 | to handle that. */ | |
f6ac5f3d PA |
170 | int |
171 | procfs_target::auxv_parse (gdb_byte **readptr, | |
172 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
c47ffbe3 | 173 | { |
f5656ead | 174 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
175 | gdb_byte *ptr = *readptr; |
176 | ||
177 | if (endptr == ptr) | |
178 | return 0; | |
77382aee | 179 | |
c47ffbe3 VP |
180 | if (endptr - ptr < 8 * 2) |
181 | return -1; | |
182 | ||
e17a4113 | 183 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
184 | ptr += 8; |
185 | /* The size of data is always 64-bit. If the application is 32-bit, | |
186 | it will be zero extended, as expected. */ | |
e17a4113 | 187 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
188 | ptr += 8; |
189 | ||
190 | *readptr = ptr; | |
191 | return 1; | |
192 | } | |
193 | #endif | |
194 | ||
c3f6f71d JM |
195 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
196 | ||
77382aee PA |
197 | /* World Unification: |
198 | ||
199 | Put any typedefs, defines etc. here that are required for the | |
200 | unification of code that handles different versions of /proc. */ | |
c3f6f71d | 201 | |
44122162 RO |
202 | enum { READ_WATCHFLAG = WA_READ, |
203 | WRITE_WATCHFLAG = WA_WRITE, | |
204 | EXEC_WATCHFLAG = WA_EXEC, | |
205 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
206 | }; | |
c3f6f71d JM |
207 | |
208 | ||
209 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
210 | ||
211 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
212 | ||
213 | /* The procinfo struct is a wrapper to hold all the state information | |
214 | concerning a /proc process. There should be exactly one procinfo | |
215 | for each process, and since GDB currently can debug only one | |
216 | process at a time, that means there should be only one procinfo. | |
217 | All of the LWP's of a process can be accessed indirectly thru the | |
218 | single process procinfo. | |
219 | ||
220 | However, against the day when GDB may debug more than one process, | |
221 | this data structure is kept in a list (which for now will hold no | |
222 | more than one member), and many functions will have a pointer to a | |
223 | procinfo as an argument. | |
224 | ||
225 | There will be a separate procinfo structure for use by the (not yet | |
226 | implemented) "info proc" command, so that we can print useful | |
227 | information about any random process without interfering with the | |
0df8b418 | 228 | inferior's procinfo information. */ |
c3f6f71d | 229 | |
c3f6f71d | 230 | /* format strings for /proc paths */ |
44122162 RO |
231 | #define MAIN_PROC_NAME_FMT "/proc/%d" |
232 | #define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
233 | #define AS_PROC_NAME_FMT "/proc/%d/as" | |
234 | #define MAP_PROC_NAME_FMT "/proc/%d/map" | |
235 | #define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
13db92d3 | 236 | #define MAX_PROC_NAME_SIZE sizeof("/proc/999999/lwp/0123456789/lwpstatus") |
c906108c | 237 | |
c3f6f71d JM |
238 | typedef struct procinfo { |
239 | struct procinfo *next; | |
240 | int pid; /* Process ID */ | |
241 | int tid; /* Thread/LWP id */ | |
c906108c | 242 | |
c3f6f71d JM |
243 | /* process state */ |
244 | int was_stopped; | |
245 | int ignore_next_sigstop; | |
c906108c | 246 | |
c3f6f71d | 247 | int ctl_fd; /* File descriptor for /proc control file */ |
c3f6f71d JM |
248 | int status_fd; /* File descriptor for /proc status file */ |
249 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 250 | |
c3f6f71d | 251 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 252 | |
c3f6f71d | 253 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
44122162 RO |
254 | sigset_t saved_sigset; /* Saved traced signal set */ |
255 | sigset_t saved_sighold; /* Saved held signal set */ | |
37de36c6 KB |
256 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
257 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 258 | |
44122162 | 259 | pstatus_t prstatus; /* Current process status info */ |
19958708 | 260 | |
c3f6f71d | 261 | struct procinfo *thread_list; |
c906108c | 262 | |
c3f6f71d JM |
263 | int status_valid : 1; |
264 | int gregs_valid : 1; | |
265 | int fpregs_valid : 1; | |
266 | int threads_valid: 1; | |
267 | } procinfo; | |
c906108c | 268 | |
c3f6f71d | 269 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 270 | |
c3f6f71d | 271 | /* Function prototypes for procinfo module: */ |
c906108c | 272 | |
a14ed312 KB |
273 | static procinfo *find_procinfo_or_die (int pid, int tid); |
274 | static procinfo *find_procinfo (int pid, int tid); | |
275 | static procinfo *create_procinfo (int pid, int tid); | |
44122162 | 276 | static void destroy_procinfo (procinfo *p); |
44122162 RO |
277 | static void dead_procinfo (procinfo *p, const char *msg, int killp); |
278 | static int open_procinfo_files (procinfo *p, int which); | |
279 | static void close_procinfo_files (procinfo *p); | |
280 | static sysset_t *sysset_t_alloc (procinfo *pi); | |
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 | |
0d06e24b | 459 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 460 | return pi; /* Already exists, nothing to do. */ |
c906108c | 461 | |
0df8b418 | 462 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
463 | if (tid != 0) |
464 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
465 | create it if it | |
0df8b418 | 466 | doesn't exist yet? */ |
c906108c | 467 | |
8d749320 | 468 | pi = XNEW (procinfo); |
c3f6f71d JM |
469 | memset (pi, 0, sizeof (procinfo)); |
470 | pi->pid = pid; | |
471 | pi->tid = tid; | |
c906108c | 472 | |
1d5e0602 KB |
473 | pi->saved_entryset = sysset_t_alloc (pi); |
474 | pi->saved_exitset = sysset_t_alloc (pi); | |
475 | ||
c3f6f71d JM |
476 | /* Chain into list. */ |
477 | if (tid == 0) | |
478 | { | |
479 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
480 | pi->next = procinfo_list; | |
481 | procinfo_list = pi; | |
482 | } | |
483 | else | |
484 | { | |
13db92d3 | 485 | sprintf (pi->pathname, "/proc/%d/lwp/%d", pid, tid); |
c3f6f71d JM |
486 | pi->next = parent->thread_list; |
487 | parent->thread_list = pi; | |
488 | } | |
489 | return pi; | |
490 | } | |
c906108c | 491 | |
77382aee | 492 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 493 | |
c3f6f71d | 494 | static void |
fba45db2 | 495 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
496 | { |
497 | if (pi->ctl_fd > 0) | |
498 | close (pi->ctl_fd); | |
c3f6f71d JM |
499 | if (pi->as_fd > 0) |
500 | close (pi->as_fd); | |
501 | if (pi->status_fd > 0) | |
502 | close (pi->status_fd); | |
c3f6f71d JM |
503 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
504 | } | |
c906108c | 505 | |
77382aee | 506 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 507 | |
c3f6f71d | 508 | static void |
fba45db2 | 509 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
510 | { |
511 | procinfo *ptr; | |
512 | ||
77382aee | 513 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
514 | if (pi == *list) |
515 | *list = pi->next; | |
19958708 | 516 | else |
c3f6f71d JM |
517 | for (ptr = *list; ptr; ptr = ptr->next) |
518 | if (ptr->next == pi) | |
519 | { | |
520 | ptr->next = pi->next; | |
521 | break; | |
522 | } | |
7a292a7a | 523 | |
77382aee | 524 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 525 | close_procinfo_files (pi); |
7a292a7a | 526 | |
77382aee | 527 | /* Step three: free the memory. */ |
1d5e0602 KB |
528 | xfree (pi->saved_entryset); |
529 | xfree (pi->saved_exitset); | |
b8c9b27d | 530 | xfree (pi); |
c3f6f71d | 531 | } |
c906108c | 532 | |
c3f6f71d | 533 | static void |
fba45db2 | 534 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
535 | { |
536 | procinfo *tmp; | |
c906108c | 537 | |
0df8b418 | 538 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 539 | { |
0df8b418 | 540 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
541 | destroy_one_procinfo (&tmp->thread_list, pi); |
542 | } | |
0df8b418 | 543 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
544 | { |
545 | /* First destroy the children, if any; */ | |
546 | while (pi->thread_list != NULL) | |
547 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
548 | /* Then destroy the parent. Genocide!!! */ | |
549 | destroy_one_procinfo (&procinfo_list, pi); | |
550 | } | |
551 | } | |
c906108c | 552 | |
5b4cbbe3 TT |
553 | /* A deleter that calls destroy_procinfo. */ |
554 | struct procinfo_deleter | |
004527cb | 555 | { |
5b4cbbe3 TT |
556 | void operator() (procinfo *pi) const |
557 | { | |
558 | destroy_procinfo (pi); | |
559 | } | |
560 | }; | |
561 | ||
562 | typedef std::unique_ptr<procinfo, procinfo_deleter> procinfo_up; | |
004527cb | 563 | |
c3f6f71d | 564 | enum { NOKILL, KILL }; |
c906108c | 565 | |
77382aee PA |
566 | /* To be called on a non_recoverable error for a procinfo. Prints |
567 | error messages, optionally sends a SIGKILL to the process, then | |
568 | destroys the data structure. */ | |
c906108c | 569 | |
c3f6f71d | 570 | static void |
995816ba | 571 | dead_procinfo (procinfo *pi, const char *msg, int kill_p) |
c3f6f71d JM |
572 | { |
573 | char procfile[80]; | |
c906108c | 574 | |
c3f6f71d JM |
575 | if (pi->pathname) |
576 | { | |
577 | print_sys_errmsg (pi->pathname, errno); | |
578 | } | |
579 | else | |
580 | { | |
581 | sprintf (procfile, "process %d", pi->pid); | |
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 | |
77382aee | 591 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
592 | |
593 | static sysset_t * | |
44122162 | 594 | sysset_t_alloc (procinfo *pi) |
37de36c6 | 595 | { |
44122162 | 596 | return (sysset_t *) xmalloc (sizeof (sysset_t)); |
37de36c6 KB |
597 | } |
598 | ||
c3f6f71d | 599 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 600 | |
c3f6f71d | 601 | /* =================== /proc "MODULE" =================== */ |
c906108c | 602 | |
77382aee PA |
603 | /* This "module" is the interface layer between the /proc system API |
604 | and the gdb target vector functions. This layer consists of access | |
605 | functions that encapsulate each of the basic operations that we | |
606 | need to use from the /proc API. | |
607 | ||
608 | The main motivation for this layer is to hide the fact that there | |
609 | are two very different implementations of the /proc API. Rather | |
610 | than have a bunch of #ifdefs all thru the gdb target vector | |
611 | functions, we do our best to hide them all in here. */ | |
c906108c | 612 | |
44122162 RO |
613 | static long proc_flags (procinfo *pi); |
614 | static int proc_why (procinfo *pi); | |
615 | static int proc_what (procinfo *pi); | |
616 | static int proc_set_current_signal (procinfo *pi, int signo); | |
617 | static int proc_get_current_thread (procinfo *pi); | |
d3581e61 | 618 | static int proc_iterate_over_threads |
44122162 | 619 | (procinfo *pi, |
d3581e61 JB |
620 | int (*func) (procinfo *, procinfo *, void *), |
621 | void *ptr); | |
622 | ||
623 | static void | |
995816ba | 624 | proc_warn (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
625 | { |
626 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
627 | print_sys_errmsg (errmsg, errno); | |
628 | } | |
c906108c | 629 | |
d3581e61 | 630 | static void |
995816ba | 631 | proc_error (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
632 | { |
633 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
634 | perror_with_name (errmsg); | |
635 | } | |
c906108c | 636 | |
77382aee PA |
637 | /* Updates the status struct in the procinfo. There is a 'valid' |
638 | flag, to let other functions know when this function needs to be | |
639 | called (so the status is only read when it is needed). The status | |
640 | file descriptor is also only opened when it is needed. Returns | |
641 | non-zero for success, zero for failure. */ | |
c906108c | 642 | |
d3581e61 | 643 | static int |
fba45db2 | 644 | proc_get_status (procinfo *pi) |
c3f6f71d | 645 | { |
0df8b418 | 646 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
647 | if (pi->status_fd == 0 && |
648 | open_procinfo_files (pi, FD_STATUS) == 0) | |
649 | { | |
650 | pi->status_valid = 0; | |
651 | return 0; | |
652 | } | |
c906108c | 653 | |
c3f6f71d JM |
654 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
655 | pi->status_valid = 0; /* fail */ | |
656 | else | |
657 | { | |
19958708 | 658 | /* Sigh... I have to read a different data structure, |
0df8b418 | 659 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 660 | if (pi->tid) |
19958708 RM |
661 | pi->status_valid = (read (pi->status_fd, |
662 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
663 | sizeof (lwpstatus_t)) |
664 | == sizeof (lwpstatus_t)); | |
665 | else | |
666 | { | |
19958708 | 667 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d | 668 | (char *) &pi->prstatus, |
44122162 RO |
669 | sizeof (pstatus_t)) |
670 | == sizeof (pstatus_t)); | |
c3f6f71d JM |
671 | } |
672 | } | |
c906108c | 673 | |
c3f6f71d JM |
674 | if (pi->status_valid) |
675 | { | |
19958708 | 676 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 677 | proc_why (pi), |
19958708 | 678 | proc_what (pi), |
c3f6f71d JM |
679 | proc_get_current_thread (pi)); |
680 | } | |
c906108c | 681 | |
77382aee | 682 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d | 683 | pi->gregs_valid = pi->status_valid; |
77382aee PA |
684 | /* In the read/write multiple-fd model, the status struct includes |
685 | the fp regs too, so mark them valid too. */ | |
c3f6f71d | 686 | pi->fpregs_valid = pi->status_valid; |
77382aee | 687 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 688 | } |
c906108c | 689 | |
77382aee | 690 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 691 | |
d3581e61 | 692 | static long |
fba45db2 | 693 | proc_flags (procinfo *pi) |
c3f6f71d JM |
694 | { |
695 | if (!pi->status_valid) | |
696 | if (!proc_get_status (pi)) | |
0df8b418 | 697 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 698 | |
c3f6f71d | 699 | return pi->prstatus.pr_lwp.pr_flags; |
c3f6f71d | 700 | } |
c906108c | 701 | |
77382aee | 702 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 703 | |
d3581e61 | 704 | static int |
fba45db2 | 705 | proc_why (procinfo *pi) |
c3f6f71d JM |
706 | { |
707 | if (!pi->status_valid) | |
708 | if (!proc_get_status (pi)) | |
0df8b418 | 709 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 710 | |
c3f6f71d | 711 | return pi->prstatus.pr_lwp.pr_why; |
c3f6f71d | 712 | } |
c906108c | 713 | |
77382aee | 714 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 715 | |
d3581e61 | 716 | static int |
fba45db2 | 717 | proc_what (procinfo *pi) |
c3f6f71d JM |
718 | { |
719 | if (!pi->status_valid) | |
720 | if (!proc_get_status (pi)) | |
0df8b418 | 721 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 722 | |
c3f6f71d | 723 | return pi->prstatus.pr_lwp.pr_what; |
c3f6f71d | 724 | } |
c906108c | 725 | |
77382aee PA |
726 | /* This function is only called when PI is stopped by a watchpoint. |
727 | Assuming the OS supports it, write to *ADDR the data address which | |
728 | triggered it and return 1. Return 0 if it is not possible to know | |
729 | the address. */ | |
bf701c2c PM |
730 | |
731 | static int | |
732 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
733 | { | |
734 | if (!pi->status_valid) | |
735 | if (!proc_get_status (pi)) | |
736 | return 0; | |
737 | ||
f5656ead TT |
738 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
739 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c | 740 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
bf701c2c PM |
741 | return 1; |
742 | } | |
743 | ||
77382aee PA |
744 | /* Returns the pr_nsysarg field (number of args to the current |
745 | syscall). */ | |
c3f6f71d | 746 | |
d3581e61 | 747 | static int |
fba45db2 | 748 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
749 | { |
750 | if (!pi->status_valid) | |
751 | if (!proc_get_status (pi)) | |
752 | return 0; | |
19958708 | 753 | |
c3f6f71d | 754 | return pi->prstatus.pr_lwp.pr_nsysarg; |
c3f6f71d | 755 | } |
c906108c | 756 | |
77382aee PA |
757 | /* Returns the pr_sysarg field (pointer to the arguments of current |
758 | syscall). */ | |
c906108c | 759 | |
d3581e61 | 760 | static long * |
fba45db2 | 761 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
762 | { |
763 | if (!pi->status_valid) | |
764 | if (!proc_get_status (pi)) | |
765 | return NULL; | |
19958708 | 766 | |
c3f6f71d | 767 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
c3f6f71d | 768 | } |
77382aee | 769 | |
44122162 | 770 | /* Set or reset any of the following process flags: |
77382aee PA |
771 | PR_FORK -- forked child will inherit trace flags |
772 | PR_RLC -- traced process runs when last /proc file closed. | |
773 | PR_KLC -- traced process is killed when last /proc file closed. | |
774 | PR_ASYNC -- LWP's get to run/stop independently. | |
775 | ||
44122162 | 776 | This function is done using read/write [PCSET/PCRESET/PCUNSET]. |
77382aee PA |
777 | |
778 | Arguments: | |
779 | pi -- the procinfo | |
780 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
781 | mode -- 1 for set, 0 for reset. | |
782 | ||
783 | Returns non-zero for success, zero for failure. */ | |
c906108c | 784 | |
c3f6f71d | 785 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 786 | |
c3f6f71d | 787 | static int |
fba45db2 | 788 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
789 | { |
790 | long win = 0; /* default to fail */ | |
791 | ||
77382aee PA |
792 | /* These operations affect the process as a whole, and applying them |
793 | to an individual LWP has the same meaning as applying them to the | |
794 | main process. Therefore, if we're ever called with a pointer to | |
795 | an LWP's procinfo, let's substitute the process's procinfo and | |
796 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
797 | |
798 | if (pi->pid != 0) | |
799 | pi = find_procinfo_or_die (pi->pid, 0); | |
800 | ||
44122162 | 801 | procfs_ctl_t arg[2]; |
c5aa993b | 802 | |
44122162 RO |
803 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
804 | arg[0] = PCSET; | |
0df8b418 | 805 | else /* Reset the flag. */ |
44122162 RO |
806 | arg[0] = PCUNSET; |
807 | ||
808 | arg[1] = flag; | |
809 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 810 | |
77382aee PA |
811 | /* The above operation renders the procinfo's cached pstatus |
812 | obsolete. */ | |
c3f6f71d | 813 | pi->status_valid = 0; |
c906108c | 814 | |
c3f6f71d | 815 | if (!win) |
8a3fe4f8 | 816 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
817 | flag == PR_FORK ? "PR_FORK" : |
818 | flag == PR_RLC ? "PR_RLC" : | |
c3f6f71d | 819 | flag == PR_ASYNC ? "PR_ASYNC" : |
0d06e24b | 820 | flag == PR_KLC ? "PR_KLC" : |
c3f6f71d JM |
821 | "<unknown flag>", |
822 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 823 | |
c3f6f71d JM |
824 | return win; |
825 | } | |
c906108c | 826 | |
77382aee PA |
827 | /* Set the run_on_last_close flag. Process with all threads will |
828 | become runnable when debugger closes all /proc fds. Returns | |
829 | non-zero for success, zero for failure. */ | |
c906108c | 830 | |
d3581e61 | 831 | static int |
fba45db2 | 832 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 833 | { |
c3f6f71d JM |
834 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
835 | } | |
c906108c | 836 | |
77382aee PA |
837 | /* Reset the run_on_last_close flag. The process will NOT become |
838 | runnable when debugger closes its file handles. Returns non-zero | |
839 | for success, zero for failure. */ | |
c906108c | 840 | |
d3581e61 | 841 | static int |
fba45db2 | 842 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
843 | { |
844 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
845 | } |
846 | ||
77382aee PA |
847 | /* Reset inherit_on_fork flag. If the process forks a child while we |
848 | are registered for events in the parent, then we will NOT recieve | |
849 | events from the child. Returns non-zero for success, zero for | |
850 | failure. */ | |
c906108c | 851 | |
d3581e61 | 852 | static int |
fba45db2 | 853 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
854 | { |
855 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
856 | } | |
c906108c | 857 | |
77382aee PA |
858 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
859 | (signal etc.), the remaining LWPs will continue to run. Returns | |
860 | non-zero for success, zero for failure. */ | |
c906108c | 861 | |
d3581e61 | 862 | static int |
fba45db2 | 863 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
864 | { |
865 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
866 | } | |
c906108c | 867 | |
77382aee PA |
868 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
869 | (signal etc.), then all other LWPs will stop as well. Returns | |
870 | non-zero for success, zero for failure. */ | |
c906108c | 871 | |
d3581e61 | 872 | static int |
fba45db2 | 873 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
874 | { |
875 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
876 | } | |
c906108c | 877 | |
77382aee PA |
878 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
879 | for success, zero for failure. */ | |
c906108c | 880 | |
d3581e61 | 881 | static int |
fba45db2 | 882 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
883 | { |
884 | int win; | |
c906108c | 885 | |
77382aee PA |
886 | /* We might conceivably apply this operation to an LWP, and the |
887 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 888 | |
c3f6f71d JM |
889 | if (pi->ctl_fd == 0 && |
890 | open_procinfo_files (pi, FD_CTL) == 0) | |
891 | return 0; | |
892 | else | |
893 | { | |
37de36c6 | 894 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 895 | |
c3f6f71d | 896 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d | 897 | } |
c906108c | 898 | |
c3f6f71d JM |
899 | return win; |
900 | } | |
c5aa993b | 901 | |
77382aee PA |
902 | /* Wait for the process or LWP to stop (block until it does). Returns |
903 | non-zero for success, zero for failure. */ | |
c906108c | 904 | |
d3581e61 | 905 | static int |
fba45db2 | 906 | proc_wait_for_stop (procinfo *pi) |
c906108c | 907 | { |
c3f6f71d JM |
908 | int win; |
909 | ||
77382aee PA |
910 | /* We should never have to apply this operation to any procinfo |
911 | except the one for the main process. If that ever changes for | |
912 | any reason, then take out the following clause and replace it | |
913 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 914 | |
c3f6f71d JM |
915 | if (pi->tid != 0) |
916 | pi = find_procinfo_or_die (pi->pid, 0); | |
917 | ||
44122162 | 918 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 919 | |
44122162 RO |
920 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
921 | /* We been runnin' and we stopped -- need to update status. */ | |
922 | pi->status_valid = 0; | |
c906108c | 923 | |
c3f6f71d | 924 | return win; |
c906108c SS |
925 | } |
926 | ||
77382aee PA |
927 | /* Make the process or LWP runnable. |
928 | ||
929 | Options (not all are implemented): | |
930 | - single-step | |
931 | - clear current fault | |
932 | - clear current signal | |
933 | - abort the current system call | |
934 | - stop as soon as finished with system call | |
935 | - (ioctl): set traced signal set | |
936 | - (ioctl): set held signal set | |
937 | - (ioctl): set traced fault set | |
938 | - (ioctl): set start pc (vaddr) | |
939 | ||
940 | Always clears the current fault. PI is the process or LWP to | |
941 | operate on. If STEP is true, set the process or LWP to trap after | |
942 | one instruction. If SIGNO is zero, clear the current signal if | |
943 | any; if non-zero, set the current signal to this one. Returns | |
944 | non-zero for success, zero for failure. */ | |
c3f6f71d | 945 | |
d3581e61 | 946 | static int |
fba45db2 | 947 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
948 | { |
949 | int win; | |
950 | int runflags; | |
951 | ||
77382aee PA |
952 | /* We will probably have to apply this operation to individual |
953 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 954 | |
c3f6f71d JM |
955 | if (pi->ctl_fd == 0 && |
956 | open_procinfo_files (pi, FD_CTL) == 0) | |
957 | { | |
958 | return 0; | |
959 | } | |
c906108c | 960 | |
0df8b418 | 961 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
962 | if (step) |
963 | runflags |= PRSTEP; | |
964 | if (signo == 0) | |
965 | runflags |= PRCSIG; | |
0df8b418 | 966 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 967 | proc_set_current_signal (pi, signo); |
c5aa993b | 968 | |
44122162 | 969 | procfs_ctl_t cmd[2]; |
c906108c | 970 | |
44122162 RO |
971 | cmd[0] = PCRUN; |
972 | cmd[1] = runflags; | |
973 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c906108c | 974 | |
c3f6f71d JM |
975 | return win; |
976 | } | |
c906108c | 977 | |
77382aee PA |
978 | /* Register to trace signals in the process or LWP. Returns non-zero |
979 | for success, zero for failure. */ | |
c906108c | 980 | |
d3581e61 | 981 | static int |
44122162 | 982 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 983 | { |
c3f6f71d JM |
984 | int win; |
985 | ||
77382aee PA |
986 | /* We should never have to apply this operation to any procinfo |
987 | except the one for the main process. If that ever changes for | |
988 | any reason, then take out the following clause and replace it | |
989 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 990 | |
c3f6f71d JM |
991 | if (pi->tid != 0) |
992 | pi = find_procinfo_or_die (pi->pid, 0); | |
993 | ||
44122162 RO |
994 | struct { |
995 | procfs_ctl_t cmd; | |
996 | /* Use char array to avoid alignment issues. */ | |
997 | char sigset[sizeof (sigset_t)]; | |
998 | } arg; | |
c906108c | 999 | |
44122162 RO |
1000 | arg.cmd = PCSTRACE; |
1001 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
1002 | ||
1003 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1004 | |
0df8b418 | 1005 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1006 | pi->status_valid = 0; |
c906108c | 1007 | |
c3f6f71d | 1008 | if (!win) |
8a3fe4f8 | 1009 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1010 | return win; |
c906108c SS |
1011 | } |
1012 | ||
77382aee PA |
1013 | /* Register to trace hardware faults in the process or LWP. Returns |
1014 | non-zero for success, zero for failure. */ | |
c906108c | 1015 | |
d3581e61 | 1016 | static int |
fba45db2 | 1017 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1018 | { |
1019 | int win; | |
1020 | ||
77382aee PA |
1021 | /* We should never have to apply this operation to any procinfo |
1022 | except the one for the main process. If that ever changes for | |
1023 | any reason, then take out the following clause and replace it | |
1024 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1025 | |
c3f6f71d JM |
1026 | if (pi->tid != 0) |
1027 | pi = find_procinfo_or_die (pi->pid, 0); | |
1028 | ||
44122162 RO |
1029 | struct { |
1030 | procfs_ctl_t cmd; | |
1031 | /* Use char array to avoid alignment issues. */ | |
1032 | char fltset[sizeof (fltset_t)]; | |
1033 | } arg; | |
1034 | ||
1035 | arg.cmd = PCSFAULT; | |
1036 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1037 | |
44122162 | 1038 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
c906108c | 1039 | |
0df8b418 | 1040 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1041 | pi->status_valid = 0; |
c906108c | 1042 | |
c3f6f71d JM |
1043 | return win; |
1044 | } | |
c5aa993b | 1045 | |
77382aee PA |
1046 | /* Register to trace entry to system calls in the process or LWP. |
1047 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1048 | |
d3581e61 | 1049 | static int |
fba45db2 | 1050 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1051 | { |
c3f6f71d JM |
1052 | int win; |
1053 | ||
77382aee PA |
1054 | /* We should never have to apply this operation to any procinfo |
1055 | except the one for the main process. If that ever changes for | |
1056 | any reason, then take out the following clause and replace it | |
1057 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1058 | |
c3f6f71d JM |
1059 | if (pi->tid != 0) |
1060 | pi = find_procinfo_or_die (pi->pid, 0); | |
1061 | ||
44122162 RO |
1062 | struct gdb_proc_ctl_pcsentry { |
1063 | procfs_ctl_t cmd; | |
1064 | /* Use char array to avoid alignment issues. */ | |
1065 | char sysset[sizeof (sysset_t)]; | |
1066 | } *argp; | |
1067 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry); | |
c3f6f71d | 1068 | |
44122162 | 1069 | argp = (struct gdb_proc_ctl_pcsentry *) xmalloc (argp_size); |
c3f6f71d | 1070 | |
44122162 RO |
1071 | argp->cmd = PCSENTRY; |
1072 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
1073 | ||
1074 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1075 | xfree (argp); | |
37de36c6 | 1076 | |
77382aee PA |
1077 | /* The above operation renders the procinfo's cached pstatus |
1078 | obsolete. */ | |
c3f6f71d | 1079 | pi->status_valid = 0; |
19958708 | 1080 | |
c3f6f71d | 1081 | return win; |
c906108c SS |
1082 | } |
1083 | ||
77382aee PA |
1084 | /* Register to trace exit from system calls in the process or LWP. |
1085 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1086 | |
d3581e61 | 1087 | static int |
fba45db2 | 1088 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1089 | { |
1090 | int win; | |
1091 | ||
77382aee PA |
1092 | /* We should never have to apply this operation to any procinfo |
1093 | except the one for the main process. If that ever changes for | |
1094 | any reason, then take out the following clause and replace it | |
1095 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1096 | |
c3f6f71d JM |
1097 | if (pi->tid != 0) |
1098 | pi = find_procinfo_or_die (pi->pid, 0); | |
1099 | ||
44122162 RO |
1100 | struct gdb_proc_ctl_pcsexit { |
1101 | procfs_ctl_t cmd; | |
1102 | /* Use char array to avoid alignment issues. */ | |
1103 | char sysset[sizeof (sysset_t)]; | |
1104 | } *argp; | |
1105 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit); | |
1106 | ||
1107 | argp = (struct gdb_proc_ctl_pcsexit *) xmalloc (argp_size); | |
c906108c | 1108 | |
44122162 RO |
1109 | argp->cmd = PCSEXIT; |
1110 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1111 | |
44122162 RO |
1112 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
1113 | xfree (argp); | |
37de36c6 | 1114 | |
77382aee PA |
1115 | /* The above operation renders the procinfo's cached pstatus |
1116 | obsolete. */ | |
c3f6f71d | 1117 | pi->status_valid = 0; |
c906108c | 1118 | |
c3f6f71d JM |
1119 | return win; |
1120 | } | |
c906108c | 1121 | |
77382aee PA |
1122 | /* Specify the set of blocked / held signals in the process or LWP. |
1123 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1124 | |
d3581e61 | 1125 | static int |
44122162 | 1126 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1127 | { |
c3f6f71d JM |
1128 | int win; |
1129 | ||
77382aee PA |
1130 | /* We should never have to apply this operation to any procinfo |
1131 | except the one for the main process. If that ever changes for | |
1132 | any reason, then take out the following clause and replace it | |
1133 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1134 | |
c3f6f71d JM |
1135 | if (pi->tid != 0) |
1136 | pi = find_procinfo_or_die (pi->pid, 0); | |
1137 | ||
44122162 RO |
1138 | struct { |
1139 | procfs_ctl_t cmd; | |
1140 | /* Use char array to avoid alignment issues. */ | |
1141 | char hold[sizeof (sigset_t)]; | |
1142 | } arg; | |
1143 | ||
1144 | arg.cmd = PCSHOLD; | |
1145 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1146 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1147 | ||
77382aee PA |
1148 | /* The above operation renders the procinfo's cached pstatus |
1149 | obsolete. */ | |
c3f6f71d JM |
1150 | pi->status_valid = 0; |
1151 | ||
1152 | return win; | |
c906108c SS |
1153 | } |
1154 | ||
77382aee PA |
1155 | /* Returns the set of signals that are held / blocked. Will also copy |
1156 | the sigset if SAVE is non-zero. */ | |
c906108c | 1157 | |
44122162 RO |
1158 | static sigset_t * |
1159 | proc_get_held_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1160 | { |
44122162 | 1161 | sigset_t *ret = NULL; |
c3f6f71d | 1162 | |
77382aee PA |
1163 | /* We should never have to apply this operation to any procinfo |
1164 | except the one for the main process. If that ever changes for | |
1165 | any reason, then take out the following clause and replace it | |
1166 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1167 | |
c3f6f71d JM |
1168 | if (pi->tid != 0) |
1169 | pi = find_procinfo_or_die (pi->pid, 0); | |
1170 | ||
c3f6f71d JM |
1171 | if (!pi->status_valid) |
1172 | if (!proc_get_status (pi)) | |
1173 | return NULL; | |
1174 | ||
c3f6f71d | 1175 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d | 1176 | if (save && ret) |
44122162 | 1177 | memcpy (save, ret, sizeof (sigset_t)); |
c3f6f71d JM |
1178 | |
1179 | return ret; | |
c906108c SS |
1180 | } |
1181 | ||
77382aee PA |
1182 | /* Returns the set of signals that are traced / debugged. Will also |
1183 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1184 | |
44122162 RO |
1185 | static sigset_t * |
1186 | proc_get_traced_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1187 | { |
44122162 | 1188 | sigset_t *ret = NULL; |
c3f6f71d | 1189 | |
77382aee PA |
1190 | /* We should never have to apply this operation to any procinfo |
1191 | except the one for the main process. If that ever changes for | |
1192 | any reason, then take out the following clause and replace it | |
1193 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1194 | |
c3f6f71d JM |
1195 | if (pi->tid != 0) |
1196 | pi = find_procinfo_or_die (pi->pid, 0); | |
1197 | ||
c3f6f71d JM |
1198 | if (!pi->status_valid) |
1199 | if (!proc_get_status (pi)) | |
1200 | return NULL; | |
1201 | ||
1202 | ret = &pi->prstatus.pr_sigtrace; | |
c3f6f71d | 1203 | if (save && ret) |
44122162 | 1204 | memcpy (save, ret, sizeof (sigset_t)); |
c906108c | 1205 | |
c3f6f71d JM |
1206 | return ret; |
1207 | } | |
c906108c | 1208 | |
77382aee PA |
1209 | /* Returns the set of hardware faults that are traced /debugged. Will |
1210 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1211 | |
d3581e61 | 1212 | static fltset_t * |
fba45db2 | 1213 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1214 | { |
1215 | fltset_t *ret = NULL; | |
1216 | ||
77382aee PA |
1217 | /* We should never have to apply this operation to any procinfo |
1218 | except the one for the main process. If that ever changes for | |
1219 | any reason, then take out the following clause and replace it | |
1220 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1221 | |
c3f6f71d JM |
1222 | if (pi->tid != 0) |
1223 | pi = find_procinfo_or_die (pi->pid, 0); | |
1224 | ||
c3f6f71d JM |
1225 | if (!pi->status_valid) |
1226 | if (!proc_get_status (pi)) | |
1227 | return NULL; | |
1228 | ||
1229 | ret = &pi->prstatus.pr_flttrace; | |
c3f6f71d JM |
1230 | if (save && ret) |
1231 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1232 | |
c3f6f71d JM |
1233 | return ret; |
1234 | } | |
c906108c | 1235 | |
77382aee PA |
1236 | /* Returns the set of syscalls that are traced /debugged on entry. |
1237 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1238 | |
d3581e61 | 1239 | static sysset_t * |
fba45db2 | 1240 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1241 | { |
1242 | sysset_t *ret = NULL; | |
1243 | ||
77382aee PA |
1244 | /* We should never have to apply this operation to any procinfo |
1245 | except the one for the main process. If that ever changes for | |
1246 | any reason, then take out the following clause and replace it | |
1247 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1248 | |
c3f6f71d JM |
1249 | if (pi->tid != 0) |
1250 | pi = find_procinfo_or_die (pi->pid, 0); | |
1251 | ||
c3f6f71d JM |
1252 | if (!pi->status_valid) |
1253 | if (!proc_get_status (pi)) | |
1254 | return NULL; | |
1255 | ||
1256 | ret = &pi->prstatus.pr_sysentry; | |
c3f6f71d | 1257 | if (save && ret) |
44122162 | 1258 | memcpy (save, ret, sizeof (sysset_t)); |
c906108c | 1259 | |
c3f6f71d JM |
1260 | return ret; |
1261 | } | |
c5aa993b | 1262 | |
77382aee PA |
1263 | /* Returns the set of syscalls that are traced /debugged on exit. |
1264 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1265 | |
d3581e61 | 1266 | static sysset_t * |
fba45db2 | 1267 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1268 | { |
44122162 | 1269 | sysset_t *ret = NULL; |
c3f6f71d | 1270 | |
77382aee PA |
1271 | /* We should never have to apply this operation to any procinfo |
1272 | except the one for the main process. If that ever changes for | |
1273 | any reason, then take out the following clause and replace it | |
1274 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1275 | |
c3f6f71d JM |
1276 | if (pi->tid != 0) |
1277 | pi = find_procinfo_or_die (pi->pid, 0); | |
1278 | ||
c3f6f71d JM |
1279 | if (!pi->status_valid) |
1280 | if (!proc_get_status (pi)) | |
1281 | return NULL; | |
1282 | ||
1283 | ret = &pi->prstatus.pr_sysexit; | |
c3f6f71d | 1284 | if (save && ret) |
44122162 | 1285 | memcpy (save, ret, sizeof (sysset_t)); |
c3f6f71d JM |
1286 | |
1287 | return ret; | |
1288 | } | |
c906108c | 1289 | |
77382aee PA |
1290 | /* The current fault (if any) is cleared; the associated signal will |
1291 | not be sent to the process or LWP when it resumes. Returns | |
1292 | non-zero for success, zero for failure. */ | |
c906108c | 1293 | |
d3581e61 | 1294 | static int |
fba45db2 | 1295 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
1296 | { |
1297 | int win; | |
1298 | ||
77382aee PA |
1299 | /* We should never have to apply this operation to any procinfo |
1300 | except the one for the main process. If that ever changes for | |
1301 | any reason, then take out the following clause and replace it | |
1302 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1303 | |
c3f6f71d JM |
1304 | if (pi->tid != 0) |
1305 | pi = find_procinfo_or_die (pi->pid, 0); | |
1306 | ||
44122162 | 1307 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 1308 | |
44122162 | 1309 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d JM |
1310 | |
1311 | return win; | |
c906108c SS |
1312 | } |
1313 | ||
77382aee PA |
1314 | /* Set the "current signal" that will be delivered next to the |
1315 | process. NOTE: semantics are different from those of KILL. This | |
1316 | signal will be delivered to the process or LWP immediately when it | |
1317 | is resumed (even if the signal is held/blocked); it will NOT | |
1318 | immediately cause another event of interest, and will NOT first | |
1319 | trap back to the debugger. Returns non-zero for success, zero for | |
1320 | failure. */ | |
c3f6f71d | 1321 | |
d3581e61 | 1322 | static int |
fba45db2 | 1323 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1324 | { |
1325 | int win; | |
1326 | struct { | |
37de36c6 | 1327 | procfs_ctl_t cmd; |
c3f6f71d | 1328 | /* Use char array to avoid alignment issues. */ |
44122162 | 1329 | char sinfo[sizeof (siginfo_t)]; |
c3f6f71d | 1330 | } arg; |
44122162 | 1331 | siginfo_t mysinfo; |
c162e8c9 JM |
1332 | ptid_t wait_ptid; |
1333 | struct target_waitstatus wait_status; | |
c3f6f71d | 1334 | |
77382aee PA |
1335 | /* We should never have to apply this operation to any procinfo |
1336 | except the one for the main process. If that ever changes for | |
1337 | any reason, then take out the following clause and replace it | |
1338 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1339 | |
c3f6f71d JM |
1340 | if (pi->tid != 0) |
1341 | pi = find_procinfo_or_die (pi->pid, 0); | |
1342 | ||
c3f6f71d | 1343 | /* The pointer is just a type alias. */ |
c162e8c9 | 1344 | get_last_target_status (&wait_ptid, &wait_status); |
d7e15655 | 1345 | if (wait_ptid == inferior_ptid |
c162e8c9 | 1346 | && wait_status.kind == TARGET_WAITKIND_STOPPED |
2ea28649 | 1347 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 | 1348 | && proc_get_status (pi) |
c162e8c9 | 1349 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
c162e8c9 JM |
1350 | ) |
1351 | /* Use the siginfo associated with the signal being | |
1352 | redelivered. */ | |
44122162 | 1353 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (siginfo_t)); |
c162e8c9 JM |
1354 | else |
1355 | { | |
73930d4d KH |
1356 | mysinfo.si_signo = signo; |
1357 | mysinfo.si_code = 0; | |
1358 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1359 | mysinfo.si_uid = getuid (); /* ?why? */ | |
44122162 | 1360 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); |
c162e8c9 | 1361 | } |
c3f6f71d | 1362 | |
c3f6f71d JM |
1363 | arg.cmd = PCSSIG; |
1364 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1365 | |
c3f6f71d JM |
1366 | return win; |
1367 | } | |
c906108c | 1368 | |
77382aee PA |
1369 | /* The current signal (if any) is cleared, and is not sent to the |
1370 | process or LWP when it resumes. Returns non-zero for success, zero | |
1371 | for failure. */ | |
c906108c | 1372 | |
d3581e61 | 1373 | static int |
fba45db2 | 1374 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
1375 | { |
1376 | int win; | |
1377 | ||
77382aee PA |
1378 | /* We should never have to apply this operation to any procinfo |
1379 | except the one for the main process. If that ever changes for | |
1380 | any reason, then take out the following clause and replace it | |
1381 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1382 | |
c3f6f71d JM |
1383 | if (pi->tid != 0) |
1384 | pi = find_procinfo_or_die (pi->pid, 0); | |
1385 | ||
44122162 RO |
1386 | struct { |
1387 | procfs_ctl_t cmd; | |
1388 | /* Use char array to avoid alignment issues. */ | |
1389 | char sinfo[sizeof (siginfo_t)]; | |
1390 | } arg; | |
1391 | siginfo_t mysinfo; | |
1392 | ||
1393 | arg.cmd = PCSSIG; | |
1394 | /* The pointer is just a type alias. */ | |
1395 | mysinfo.si_signo = 0; | |
1396 | mysinfo.si_code = 0; | |
1397 | mysinfo.si_errno = 0; | |
1398 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1399 | mysinfo.si_uid = getuid (); /* ?why? */ | |
1400 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); | |
1401 | ||
1402 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1403 | |
c3f6f71d JM |
1404 | return win; |
1405 | } | |
c906108c | 1406 | |
772cf8be MK |
1407 | /* Return the general-purpose registers for the process or LWP |
1408 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1409 | |
d3581e61 | 1410 | static gdb_gregset_t * |
fba45db2 | 1411 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
1412 | { |
1413 | if (!pi->status_valid || !pi->gregs_valid) | |
1414 | if (!proc_get_status (pi)) | |
1415 | return NULL; | |
1416 | ||
c3f6f71d | 1417 | return &pi->prstatus.pr_lwp.pr_reg; |
c3f6f71d | 1418 | } |
c5aa993b | 1419 | |
772cf8be MK |
1420 | /* Return the general-purpose registers for the process or LWP |
1421 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1422 | |
d3581e61 | 1423 | static gdb_fpregset_t * |
fba45db2 | 1424 | proc_get_fpregs (procinfo *pi) |
c906108c | 1425 | { |
c3f6f71d JM |
1426 | if (!pi->status_valid || !pi->fpregs_valid) |
1427 | if (!proc_get_status (pi)) | |
1428 | return NULL; | |
1429 | ||
c3f6f71d | 1430 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c906108c SS |
1431 | } |
1432 | ||
772cf8be MK |
1433 | /* Write the general-purpose registers back to the process or LWP |
1434 | corresponding to PI. Return non-zero for success, zero for | |
1435 | failure. */ | |
c3f6f71d | 1436 | |
d3581e61 | 1437 | static int |
fba45db2 | 1438 | proc_set_gregs (procinfo *pi) |
c906108c | 1439 | { |
c3f6f71d JM |
1440 | gdb_gregset_t *gregs; |
1441 | int win; | |
c5aa993b | 1442 | |
772cf8be MK |
1443 | gregs = proc_get_gregs (pi); |
1444 | if (gregs == NULL) | |
1445 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 1446 | |
772cf8be | 1447 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1448 | { |
c3f6f71d | 1449 | return 0; |
c906108c | 1450 | } |
c3f6f71d | 1451 | else |
c906108c | 1452 | { |
c3f6f71d | 1453 | struct { |
37de36c6 | 1454 | procfs_ctl_t cmd; |
c3f6f71d JM |
1455 | /* Use char array to avoid alignment issues. */ |
1456 | char gregs[sizeof (gdb_gregset_t)]; | |
1457 | } arg; | |
1458 | ||
772cf8be | 1459 | arg.cmd = PCSREG; |
c3f6f71d JM |
1460 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
1461 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1462 | } |
c3f6f71d | 1463 | |
772cf8be | 1464 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1465 | pi->gregs_valid = 0; |
1466 | return win; | |
c906108c SS |
1467 | } |
1468 | ||
772cf8be MK |
1469 | /* Write the floating-pointer registers back to the process or LWP |
1470 | corresponding to PI. Return non-zero for success, zero for | |
1471 | failure. */ | |
c3f6f71d | 1472 | |
d3581e61 | 1473 | static int |
fba45db2 | 1474 | proc_set_fpregs (procinfo *pi) |
c906108c | 1475 | { |
c3f6f71d JM |
1476 | gdb_fpregset_t *fpregs; |
1477 | int win; | |
1478 | ||
772cf8be MK |
1479 | fpregs = proc_get_fpregs (pi); |
1480 | if (fpregs == NULL) | |
1481 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 1482 | |
772cf8be | 1483 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1484 | { |
c3f6f71d | 1485 | return 0; |
c906108c | 1486 | } |
c3f6f71d | 1487 | else |
c906108c | 1488 | { |
c3f6f71d | 1489 | struct { |
37de36c6 | 1490 | procfs_ctl_t cmd; |
c3f6f71d JM |
1491 | /* Use char array to avoid alignment issues. */ |
1492 | char fpregs[sizeof (gdb_fpregset_t)]; | |
1493 | } arg; | |
1494 | ||
772cf8be | 1495 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
1496 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
1497 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1498 | } |
c3f6f71d | 1499 | |
772cf8be | 1500 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1501 | pi->fpregs_valid = 0; |
1502 | return win; | |
c906108c SS |
1503 | } |
1504 | ||
77382aee PA |
1505 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
1506 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1507 | |
d3581e61 | 1508 | static int |
fba45db2 | 1509 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
1510 | { |
1511 | int win; | |
c906108c | 1512 | |
77382aee PA |
1513 | /* We might conceivably apply this operation to an LWP, and the |
1514 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1515 | |
c3f6f71d JM |
1516 | if (pi->ctl_fd == 0 && |
1517 | open_procinfo_files (pi, FD_CTL) == 0) | |
1518 | { | |
1519 | return 0; | |
1520 | } | |
1521 | else | |
1522 | { | |
37de36c6 | 1523 | procfs_ctl_t cmd[2]; |
c906108c | 1524 | |
c3f6f71d JM |
1525 | cmd[0] = PCKILL; |
1526 | cmd[1] = signo; | |
1527 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c3f6f71d | 1528 | } |
c906108c | 1529 | |
c3f6f71d JM |
1530 | return win; |
1531 | } | |
c906108c | 1532 | |
77382aee PA |
1533 | /* Find the pid of the process that started this one. Returns the |
1534 | parent process pid, or zero. */ | |
c906108c | 1535 | |
d3581e61 | 1536 | static int |
fba45db2 | 1537 | proc_parent_pid (procinfo *pi) |
c906108c | 1538 | { |
77382aee PA |
1539 | /* We should never have to apply this operation to any procinfo |
1540 | except the one for the main process. If that ever changes for | |
1541 | any reason, then take out the following clause and replace it | |
1542 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1543 | |
c3f6f71d JM |
1544 | if (pi->tid != 0) |
1545 | pi = find_procinfo_or_die (pi->pid, 0); | |
1546 | ||
1547 | if (!pi->status_valid) | |
1548 | if (!proc_get_status (pi)) | |
1549 | return 0; | |
c5aa993b | 1550 | |
c3f6f71d JM |
1551 | return pi->prstatus.pr_ppid; |
1552 | } | |
1553 | ||
9a043c1d AC |
1554 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
1555 | (a.k.a void pointer)! */ | |
1556 | ||
1557 | static void * | |
1558 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
1559 | { | |
f5656ead | 1560 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
1561 | void *ptr; |
1562 | ||
4e906f53 | 1563 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 1564 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 1565 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
1566 | return ptr; |
1567 | } | |
1568 | ||
a0911fd0 | 1569 | static int |
fba45db2 | 1570 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 1571 | { |
c3f6f71d | 1572 | struct { |
37de36c6 | 1573 | procfs_ctl_t cmd; |
c3f6f71d JM |
1574 | char watch[sizeof (prwatch_t)]; |
1575 | } arg; | |
73930d4d | 1576 | prwatch_t pwatch; |
c3f6f71d | 1577 | |
9a043c1d AC |
1578 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
1579 | convert a target address into something that can be stored in a | |
1580 | native data structure. */ | |
73930d4d | 1581 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
73930d4d KH |
1582 | pwatch.pr_size = len; |
1583 | pwatch.pr_wflags = wflags; | |
c3f6f71d | 1584 | arg.cmd = PCWATCH; |
73930d4d | 1585 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d | 1586 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
c906108c SS |
1587 | } |
1588 | ||
965b60ee | 1589 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 1590 | |
c3f6f71d | 1591 | #include <sys/sysi86.h> |
c906108c | 1592 | |
77382aee PA |
1593 | /* The KEY is actually the value of the lower 16 bits of the GS |
1594 | register for the LWP that we're interested in. Returns the | |
1595 | matching ssh struct (LDT entry). */ | |
c906108c | 1596 | |
337c776f | 1597 | static struct ssd * |
fba45db2 | 1598 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 1599 | { |
c3f6f71d | 1600 | static struct ssd *ldt_entry = NULL; |
c3f6f71d | 1601 | char pathname[MAX_PROC_NAME_SIZE]; |
c3f6f71d JM |
1602 | |
1603 | /* Allocate space for one LDT entry. | |
1604 | This alloc must persist, because we return a pointer to it. */ | |
1605 | if (ldt_entry == NULL) | |
8d749320 | 1606 | ldt_entry = XNEW (struct ssd); |
c3f6f71d JM |
1607 | |
1608 | /* Open the file descriptor for the LDT table. */ | |
1609 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
5dc1a704 TT |
1610 | scoped_fd fd (open_with_retry (pathname, O_RDONLY)); |
1611 | if (fd.get () < 0) | |
c906108c | 1612 | { |
c3f6f71d JM |
1613 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
1614 | return NULL; | |
c906108c SS |
1615 | } |
1616 | ||
c3f6f71d | 1617 | /* Now 'read' thru the table, find a match and return it. */ |
5dc1a704 TT |
1618 | while (read (fd.get (), ldt_entry, sizeof (struct ssd)) |
1619 | == sizeof (struct ssd)) | |
c906108c | 1620 | { |
c3f6f71d JM |
1621 | if (ldt_entry->sel == 0 && |
1622 | ldt_entry->bo == 0 && | |
1623 | ldt_entry->acc1 == 0 && | |
1624 | ldt_entry->acc2 == 0) | |
1625 | break; /* end of table */ | |
0df8b418 | 1626 | /* If key matches, return this entry. */ |
c3f6f71d | 1627 | if (ldt_entry->sel == key) |
70b33f19 | 1628 | return ldt_entry; |
c906108c | 1629 | } |
0df8b418 | 1630 | /* Loop ended, match not found. */ |
c3f6f71d | 1631 | return NULL; |
c3f6f71d | 1632 | } |
c906108c | 1633 | |
77382aee | 1634 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
1635 | |
1636 | struct ssd * | |
1637 | procfs_find_LDT_entry (ptid_t ptid) | |
1638 | { | |
1639 | gdb_gregset_t *gregs; | |
1640 | int key; | |
1641 | procinfo *pi; | |
1642 | ||
0df8b418 | 1643 | /* Find procinfo for the lwp. */ |
e38504b3 | 1644 | if ((pi = find_procinfo (ptid.pid (), ptid.lwp ())) == NULL) |
965b60ee | 1645 | { |
0b62613e | 1646 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
e38504b3 | 1647 | ptid.pid (), ptid.lwp ()); |
965b60ee JB |
1648 | return NULL; |
1649 | } | |
0df8b418 | 1650 | /* get its general registers. */ |
965b60ee JB |
1651 | if ((gregs = proc_get_gregs (pi)) == NULL) |
1652 | { | |
0b62613e | 1653 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
e38504b3 | 1654 | ptid.pid (), ptid.lwp ()); |
965b60ee JB |
1655 | return NULL; |
1656 | } | |
0df8b418 | 1657 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
1658 | key = (*gregs)[GS] & 0xffff; |
1659 | ||
0df8b418 | 1660 | /* Find the matching entry and return it. */ |
965b60ee JB |
1661 | return proc_get_LDT_entry (pi, key); |
1662 | } | |
1663 | ||
1664 | #endif | |
c906108c | 1665 | |
c3f6f71d | 1666 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 1667 | |
c3f6f71d | 1668 | /* =================== Thread "MODULE" =================== */ |
c906108c | 1669 | |
44122162 RO |
1670 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
1671 | since there is a different way to do threads on every OS. */ | |
c906108c | 1672 | |
44122162 | 1673 | /* Returns the number of threads for the process. */ |
c906108c | 1674 | |
d3581e61 | 1675 | static int |
fba45db2 | 1676 | proc_get_nthreads (procinfo *pi) |
c906108c | 1677 | { |
c3f6f71d JM |
1678 | if (!pi->status_valid) |
1679 | if (!proc_get_status (pi)) | |
1680 | return 0; | |
c5aa993b | 1681 | |
44122162 RO |
1682 | /* Only works for the process procinfo, because the LWP procinfos do not |
1683 | get prstatus filled in. */ | |
0df8b418 | 1684 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 1685 | pi = find_procinfo_or_die (pi->pid, 0); |
c3f6f71d | 1686 | return pi->prstatus.pr_nlwp; |
c906108c SS |
1687 | } |
1688 | ||
77382aee PA |
1689 | /* LWP version. |
1690 | ||
1691 | Return the ID of the thread that had an event of interest. | |
1692 | (ie. the one that hit a breakpoint or other traced event). All | |
1693 | other things being equal, this should be the ID of a thread that is | |
1694 | currently executing. */ | |
c3f6f71d | 1695 | |
d3581e61 | 1696 | static int |
fba45db2 | 1697 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 1698 | { |
77382aee PA |
1699 | /* Note: this should be applied to the root procinfo for the |
1700 | process, not to the procinfo for an LWP. If applied to the | |
1701 | procinfo for an LWP, it will simply return that LWP's ID. In | |
1702 | that case, find the parent process procinfo. */ | |
19958708 | 1703 | |
c3f6f71d JM |
1704 | if (pi->tid != 0) |
1705 | pi = find_procinfo_or_die (pi->pid, 0); | |
1706 | ||
1707 | if (!pi->status_valid) | |
1708 | if (!proc_get_status (pi)) | |
1709 | return 0; | |
1710 | ||
c3f6f71d | 1711 | return pi->prstatus.pr_lwp.pr_lwpid; |
c3f6f71d JM |
1712 | } |
1713 | ||
77382aee PA |
1714 | /* Discover the IDs of all the threads within the process, and create |
1715 | a procinfo for each of them (chained to the parent). This | |
1716 | unfortunately requires a different method on every OS. Returns | |
1717 | non-zero for success, zero for failure. */ | |
c906108c | 1718 | |
a0911fd0 | 1719 | static int |
fba45db2 | 1720 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
1721 | { |
1722 | if (thread && parent) /* sanity */ | |
c906108c | 1723 | { |
c3f6f71d JM |
1724 | thread->status_valid = 0; |
1725 | if (!proc_get_status (thread)) | |
1726 | destroy_one_procinfo (&parent->thread_list, thread); | |
1727 | } | |
1728 | return 0; /* keep iterating */ | |
1729 | } | |
c5aa993b | 1730 | |
d3581e61 | 1731 | static int |
fba45db2 | 1732 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
1733 | { |
1734 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
1735 | struct dirent *direntry; | |
c3f6f71d | 1736 | procinfo *thread; |
f0b3976b | 1737 | gdb_dir_up dirp; |
c3f6f71d JM |
1738 | int lwpid; |
1739 | ||
77382aee PA |
1740 | /* We should never have to apply this operation to any procinfo |
1741 | except the one for the main process. If that ever changes for | |
1742 | any reason, then take out the following clause and replace it | |
1743 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1744 | |
c3f6f71d JM |
1745 | if (pi->tid != 0) |
1746 | pi = find_procinfo_or_die (pi->pid, 0); | |
1747 | ||
1748 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
1749 | ||
05b4bd79 PA |
1750 | /* Note: this brute-force method was originally devised for Unixware |
1751 | (support removed since), and will also work on Solaris 2.6 and | |
1752 | 2.7. The original comment mentioned the existence of a much | |
1753 | simpler and more elegant way to do this on Solaris, but didn't | |
1754 | point out what that was. */ | |
c3f6f71d JM |
1755 | |
1756 | strcpy (pathname, pi->pathname); | |
1757 | strcat (pathname, "/lwp"); | |
f0b3976b TT |
1758 | dirp.reset (opendir (pathname)); |
1759 | if (dirp == NULL) | |
c3f6f71d JM |
1760 | proc_error (pi, "update_threads, opendir", __LINE__); |
1761 | ||
f0b3976b | 1762 | while ((direntry = readdir (dirp.get ())) != NULL) |
c3f6f71d JM |
1763 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ |
1764 | { | |
1765 | lwpid = atoi (&direntry->d_name[0]); | |
1766 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
1767 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
1768 | } | |
1769 | pi->threads_valid = 1; | |
c3f6f71d JM |
1770 | return 1; |
1771 | } | |
c906108c | 1772 | |
77382aee PA |
1773 | /* Given a pointer to a function, call that function once for each lwp |
1774 | in the procinfo list, until the function returns non-zero, in which | |
1775 | event return the value returned by the function. | |
1776 | ||
1777 | Note: this function does NOT call update_threads. If you want to | |
1778 | discover new threads first, you must call that function explicitly. | |
1779 | This function just makes a quick pass over the currently-known | |
1780 | procinfos. | |
1781 | ||
1782 | PI is the parent process procinfo. FUNC is the per-thread | |
1783 | function. PTR is an opaque parameter for function. Returns the | |
1784 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 1785 | |
d3581e61 | 1786 | static int |
d0849a9a KB |
1787 | proc_iterate_over_threads (procinfo *pi, |
1788 | int (*func) (procinfo *, procinfo *, void *), | |
1789 | void *ptr) | |
c906108c | 1790 | { |
c3f6f71d JM |
1791 | procinfo *thread, *next; |
1792 | int retval = 0; | |
c906108c | 1793 | |
77382aee PA |
1794 | /* We should never have to apply this operation to any procinfo |
1795 | except the one for the main process. If that ever changes for | |
1796 | any reason, then take out the following clause and replace it | |
1797 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1798 | |
c3f6f71d JM |
1799 | if (pi->tid != 0) |
1800 | pi = find_procinfo_or_die (pi->pid, 0); | |
1801 | ||
1802 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 1803 | { |
0df8b418 | 1804 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
1805 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
1806 | break; | |
c906108c | 1807 | } |
c3f6f71d JM |
1808 | |
1809 | return retval; | |
c906108c SS |
1810 | } |
1811 | ||
c3f6f71d JM |
1812 | /* =================== END, Thread "MODULE" =================== */ |
1813 | ||
1814 | /* =================== END, /proc "MODULE" =================== */ | |
1815 | ||
1816 | /* =================== GDB "MODULE" =================== */ | |
1817 | ||
77382aee PA |
1818 | /* Here are all of the gdb target vector functions and their |
1819 | friends. */ | |
c3f6f71d | 1820 | |
39f77062 | 1821 | static ptid_t do_attach (ptid_t ptid); |
6bd6f3b6 | 1822 | static void do_detach (); |
9185ddce | 1823 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 1824 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 1825 | |
77382aee PA |
1826 | /* Sets up the inferior to be debugged. Registers to trace signals, |
1827 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
1828 | may want to customize that. Returns zero for success (note! | |
1829 | unlike most functions in this module); on failure, returns the LINE | |
1830 | NUMBER where it failed! */ | |
c3f6f71d JM |
1831 | |
1832 | static int | |
fba45db2 | 1833 | procfs_debug_inferior (procinfo *pi) |
c906108c | 1834 | { |
c3f6f71d | 1835 | fltset_t traced_faults; |
44122162 | 1836 | sigset_t traced_signals; |
37de36c6 KB |
1837 | sysset_t *traced_syscall_entries; |
1838 | sysset_t *traced_syscall_exits; | |
1839 | int status; | |
c906108c | 1840 | |
0df8b418 MS |
1841 | /* Register to trace hardware faults in the child. */ |
1842 | prfillset (&traced_faults); /* trace all faults... */ | |
44122162 | 1843 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
1844 | if (!proc_set_traced_faults (pi, &traced_faults)) |
1845 | return __LINE__; | |
c906108c | 1846 | |
2455069d UW |
1847 | /* Initially, register to trace all signals in the child. */ |
1848 | prfillset (&traced_signals); | |
1849 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
1850 | return __LINE__; |
1851 | ||
37de36c6 | 1852 | |
c3f6f71d | 1853 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 | 1854 | traced_syscall_entries = sysset_t_alloc (pi); |
44122162 RO |
1855 | premptyset (traced_syscall_entries); |
1856 | praddset (traced_syscall_entries, SYS_exit); | |
1857 | praddset (traced_syscall_entries, SYS_lwp_exit); | |
c906108c | 1858 | |
37de36c6 KB |
1859 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
1860 | xfree (traced_syscall_entries); | |
1861 | if (!status) | |
c3f6f71d JM |
1862 | return __LINE__; |
1863 | ||
44122162 | 1864 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
1865 | /* GW: Rationale... |
1866 | Not all systems with /proc have all the exec* syscalls with the same | |
1867 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 1868 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 1869 | |
37de36c6 | 1870 | traced_syscall_exits = sysset_t_alloc (pi); |
44122162 | 1871 | premptyset (traced_syscall_exits); |
c3f6f71d | 1872 | #ifdef SYS_exec |
44122162 | 1873 | praddset (traced_syscall_exits, SYS_exec); |
37de36c6 | 1874 | #endif |
44122162 RO |
1875 | praddset (traced_syscall_exits, SYS_execve); |
1876 | praddset (traced_syscall_exits, SYS_lwp_create); | |
1877 | praddset (traced_syscall_exits, SYS_lwp_exit); | |
c906108c | 1878 | |
37de36c6 KB |
1879 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
1880 | xfree (traced_syscall_exits); | |
1881 | if (!status) | |
c3f6f71d JM |
1882 | return __LINE__; |
1883 | ||
c3f6f71d | 1884 | return 0; |
c906108c SS |
1885 | } |
1886 | ||
f6ac5f3d PA |
1887 | void |
1888 | procfs_target::attach (const char *args, int from_tty) | |
c906108c | 1889 | { |
c3f6f71d JM |
1890 | char *exec_file; |
1891 | int pid; | |
1892 | ||
74164c56 | 1893 | pid = parse_pid_to_attach (args); |
c3f6f71d | 1894 | |
c3f6f71d | 1895 | if (pid == getpid ()) |
8a3fe4f8 | 1896 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 1897 | |
c3f6f71d | 1898 | if (from_tty) |
c906108c | 1899 | { |
c3f6f71d JM |
1900 | exec_file = get_exec_file (0); |
1901 | ||
1902 | if (exec_file) | |
a3f17187 | 1903 | printf_filtered (_("Attaching to program `%s', %s\n"), |
f2907e49 | 1904 | exec_file, target_pid_to_str (ptid_t (pid))); |
c3f6f71d | 1905 | else |
a3f17187 | 1906 | printf_filtered (_("Attaching to %s\n"), |
f2907e49 | 1907 | target_pid_to_str (ptid_t (pid))); |
c3f6f71d JM |
1908 | |
1909 | fflush (stdout); | |
c906108c | 1910 | } |
f2907e49 | 1911 | inferior_ptid = do_attach (ptid_t (pid)); |
f6ac5f3d PA |
1912 | if (!target_is_pushed (this)) |
1913 | push_target (this); | |
c3f6f71d JM |
1914 | } |
1915 | ||
f6ac5f3d PA |
1916 | void |
1917 | procfs_target::detach (inferior *inf, int from_tty) | |
c3f6f71d | 1918 | { |
e99b03dc | 1919 | int pid = inferior_ptid.pid (); |
cc377e6b | 1920 | |
c3f6f71d | 1921 | if (from_tty) |
c906108c | 1922 | { |
995816ba | 1923 | const char *exec_file; |
cc377e6b | 1924 | |
c3f6f71d | 1925 | exec_file = get_exec_file (0); |
cc377e6b | 1926 | if (exec_file == NULL) |
c3f6f71d | 1927 | exec_file = ""; |
cc377e6b | 1928 | |
a3f17187 | 1929 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
f2907e49 | 1930 | target_pid_to_str (ptid_t (pid))); |
cc377e6b | 1931 | gdb_flush (gdb_stdout); |
c906108c | 1932 | } |
19958708 | 1933 | |
6bd6f3b6 | 1934 | do_detach (); |
cc377e6b | 1935 | |
39f77062 | 1936 | inferior_ptid = null_ptid; |
b7a08269 | 1937 | detach_inferior (inf); |
f6ac5f3d | 1938 | maybe_unpush_target (); |
c906108c SS |
1939 | } |
1940 | ||
39f77062 KB |
1941 | static ptid_t |
1942 | do_attach (ptid_t ptid) | |
c906108c | 1943 | { |
c3f6f71d | 1944 | procinfo *pi; |
181e7f93 | 1945 | struct inferior *inf; |
c3f6f71d | 1946 | int fail; |
2689673f | 1947 | int lwpid; |
c3f6f71d | 1948 | |
e99b03dc | 1949 | if ((pi = create_procinfo (ptid.pid (), 0)) == NULL) |
8a3fe4f8 | 1950 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
1951 | |
1952 | if (!open_procinfo_files (pi, FD_CTL)) | |
1953 | { | |
1954 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 1955 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
e99b03dc | 1956 | ptid.pid ()); |
c3f6f71d JM |
1957 | dead_procinfo (pi, errmsg, NOKILL); |
1958 | } | |
c906108c | 1959 | |
c3f6f71d JM |
1960 | /* Stop the process (if it isn't already stopped). */ |
1961 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 1962 | { |
c3f6f71d JM |
1963 | pi->was_stopped = 1; |
1964 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
1965 | } |
1966 | else | |
1967 | { | |
c3f6f71d JM |
1968 | pi->was_stopped = 0; |
1969 | /* Set the process to run again when we close it. */ | |
1970 | if (!proc_set_run_on_last_close (pi)) | |
1971 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
1972 | ||
0df8b418 | 1973 | /* Now stop the process. */ |
c3f6f71d JM |
1974 | if (!proc_stop_process (pi)) |
1975 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
1976 | pi->ignore_next_sigstop = 1; | |
c906108c | 1977 | } |
c3f6f71d JM |
1978 | /* Save some of the /proc state to be restored if we detach. */ |
1979 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
1980 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
1981 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
1982 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 1983 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
1984 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
1985 | NOKILL); | |
37de36c6 | 1986 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 1987 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
1988 | NOKILL); |
1989 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
1990 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
1991 | ||
1992 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
1993 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
1994 | ||
6c95b8df PA |
1995 | inf = current_inferior (); |
1996 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 1997 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 1998 | inf->attach_flag = 1; |
2689673f PA |
1999 | |
2000 | /* Create a procinfo for the current lwp. */ | |
2001 | lwpid = proc_get_current_thread (pi); | |
2002 | create_procinfo (pi->pid, lwpid); | |
2003 | ||
2004 | /* Add it to gdb's thread list. */ | |
fd79271b | 2005 | ptid = ptid_t (pi->pid, lwpid, 0); |
2689673f PA |
2006 | add_thread (ptid); |
2007 | ||
2008 | return ptid; | |
c906108c SS |
2009 | } |
2010 | ||
2011 | static void | |
6bd6f3b6 | 2012 | do_detach () |
c906108c | 2013 | { |
c3f6f71d | 2014 | procinfo *pi; |
c906108c | 2015 | |
0df8b418 | 2016 | /* Find procinfo for the main process. */ |
e99b03dc | 2017 | pi = find_procinfo_or_die (inferior_ptid.pid (), |
dfd4cc63 | 2018 | 0); /* FIXME: threads */ |
c5aa993b | 2019 | |
c3f6f71d JM |
2020 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
2021 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 2022 | |
c3f6f71d JM |
2023 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
2024 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
2025 | ||
37de36c6 | 2026 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2027 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
2028 | ||
37de36c6 | 2029 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2030 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
2031 | ||
2032 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
2033 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
2034 | ||
6bd6f3b6 SM |
2035 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
2036 | if (!(pi->was_stopped) | |
2037 | || query (_("Was stopped when attached, make it runnable again? "))) | |
c3f6f71d JM |
2038 | { |
2039 | /* Clear any pending signal. */ | |
2040 | if (!proc_clear_current_fault (pi)) | |
2041 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
2042 | ||
6bd6f3b6 | 2043 | if (!proc_clear_current_signal (pi)) |
1a303dec MS |
2044 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
2045 | ||
c3f6f71d JM |
2046 | if (!proc_set_run_on_last_close (pi)) |
2047 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
2048 | } | |
2049 | ||
c3f6f71d | 2050 | destroy_procinfo (pi); |
c906108c SS |
2051 | } |
2052 | ||
772cf8be MK |
2053 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
2054 | for all registers. | |
2055 | ||
2056 | ??? Is the following note still relevant? We can't get individual | |
2057 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
2058 | don't bother with caching at all in that case. | |
2059 | ||
2060 | NOTE: Since the /proc interface cannot give us individual | |
2061 | registers, we pay no attention to REGNUM, and just fetch them all. | |
2062 | This results in the possibility that we will do unnecessarily many | |
2063 | fetches, since we may be called repeatedly for individual | |
2064 | registers. So we cache the results, and mark the cache invalid | |
2065 | when the process is resumed. */ | |
c3f6f71d | 2066 | |
f6ac5f3d PA |
2067 | void |
2068 | procfs_target::fetch_registers (struct regcache *regcache, int regnum) | |
c906108c | 2069 | { |
772cf8be MK |
2070 | gdb_gregset_t *gregs; |
2071 | procinfo *pi; | |
222312d3 | 2072 | ptid_t ptid = regcache->ptid (); |
e99b03dc | 2073 | int pid = ptid.pid (); |
e38504b3 | 2074 | int tid = ptid.lwp (); |
ac7936df | 2075 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2076 | |
2689673f | 2077 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2078 | |
2079 | if (pi == NULL) | |
8a3fe4f8 | 2080 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
bcc0c096 | 2081 | target_pid_to_str (ptid)); |
c3f6f71d | 2082 | |
772cf8be MK |
2083 | gregs = proc_get_gregs (pi); |
2084 | if (gregs == NULL) | |
c3f6f71d JM |
2085 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
2086 | ||
56be3814 | 2087 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 2088 | |
40a6adc1 | 2089 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2090 | { |
772cf8be MK |
2091 | gdb_fpregset_t *fpregs; |
2092 | ||
40a6adc1 MD |
2093 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2094 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2095 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2096 | return; /* Not a floating point register. */ |
c5aa993b | 2097 | |
772cf8be MK |
2098 | fpregs = proc_get_fpregs (pi); |
2099 | if (fpregs == NULL) | |
60054393 | 2100 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 2101 | |
56be3814 | 2102 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 2103 | } |
c906108c SS |
2104 | } |
2105 | ||
772cf8be MK |
2106 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
2107 | this for all registers. | |
2108 | ||
2109 | NOTE: Since the /proc interface will not read individual registers, | |
2110 | we will cache these requests until the process is resumed, and only | |
2111 | then write them back to the inferior process. | |
77382aee | 2112 | |
772cf8be MK |
2113 | FIXME: is that a really bad idea? Have to think about cases where |
2114 | writing one register might affect the value of others, etc. */ | |
c906108c | 2115 | |
f6ac5f3d PA |
2116 | void |
2117 | procfs_target::store_registers (struct regcache *regcache, int regnum) | |
c3f6f71d | 2118 | { |
772cf8be MK |
2119 | gdb_gregset_t *gregs; |
2120 | procinfo *pi; | |
222312d3 | 2121 | ptid_t ptid = regcache->ptid (); |
e99b03dc | 2122 | int pid = ptid.pid (); |
e38504b3 | 2123 | int tid = ptid.lwp (); |
ac7936df | 2124 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2125 | |
2689673f | 2126 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2127 | |
2128 | if (pi == NULL) | |
8a3fe4f8 | 2129 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
bcc0c096 | 2130 | target_pid_to_str (ptid)); |
c906108c | 2131 | |
772cf8be MK |
2132 | gregs = proc_get_gregs (pi); |
2133 | if (gregs == NULL) | |
c3f6f71d | 2134 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 2135 | |
56be3814 | 2136 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
2137 | if (!proc_set_gregs (pi)) |
2138 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 2139 | |
40a6adc1 | 2140 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2141 | { |
772cf8be MK |
2142 | gdb_fpregset_t *fpregs; |
2143 | ||
40a6adc1 MD |
2144 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2145 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2146 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2147 | return; /* Not a floating point register. */ |
60054393 | 2148 | |
772cf8be MK |
2149 | fpregs = proc_get_fpregs (pi); |
2150 | if (fpregs == NULL) | |
60054393 MS |
2151 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
2152 | ||
56be3814 | 2153 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
2154 | if (!proc_set_fpregs (pi)) |
2155 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
2156 | } | |
c3f6f71d | 2157 | } |
c906108c | 2158 | |
37de36c6 KB |
2159 | static int |
2160 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
2161 | { | |
37de36c6 KB |
2162 | if (scall == SYS_lwp_exit) |
2163 | return 1; | |
37de36c6 KB |
2164 | return 0; |
2165 | } | |
2166 | ||
2167 | static int | |
2168 | syscall_is_exit (procinfo *pi, int scall) | |
2169 | { | |
37de36c6 KB |
2170 | if (scall == SYS_exit) |
2171 | return 1; | |
37de36c6 KB |
2172 | return 0; |
2173 | } | |
2174 | ||
2175 | static int | |
2176 | syscall_is_exec (procinfo *pi, int scall) | |
2177 | { | |
2178 | #ifdef SYS_exec | |
2179 | if (scall == SYS_exec) | |
2180 | return 1; | |
2181 | #endif | |
37de36c6 KB |
2182 | if (scall == SYS_execve) |
2183 | return 1; | |
37de36c6 KB |
2184 | return 0; |
2185 | } | |
2186 | ||
2187 | static int | |
2188 | syscall_is_lwp_create (procinfo *pi, int scall) | |
2189 | { | |
37de36c6 KB |
2190 | if (scall == SYS_lwp_create) |
2191 | return 1; | |
37de36c6 KB |
2192 | return 0; |
2193 | } | |
2194 | ||
77382aee PA |
2195 | /* Retrieve the next stop event from the child process. If child has |
2196 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
2197 | (or possibly wait eventcodes) into gdb internal event codes. | |
2198 | Returns the id of process (and possibly thread) that incurred the | |
2199 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 2200 | |
f6ac5f3d PA |
2201 | ptid_t |
2202 | procfs_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
2203 | int options) | |
c906108c | 2204 | { |
0df8b418 | 2205 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 2206 | procinfo *pi; |
39f77062 KB |
2207 | int wstat; |
2208 | int temp_tid; | |
2209 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
2210 | int why, what, flags; |
2211 | int retry = 0; | |
c906108c | 2212 | |
c3f6f71d | 2213 | wait_again: |
c906108c | 2214 | |
c3f6f71d JM |
2215 | retry++; |
2216 | wstat = 0; | |
f2907e49 | 2217 | retval = ptid_t (-1); |
c906108c | 2218 | |
0df8b418 | 2219 | /* Find procinfo for main process. */ |
e99b03dc | 2220 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d | 2221 | if (pi) |
c906108c | 2222 | { |
0df8b418 | 2223 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
2224 | pi->status_valid = 0; |
2225 | pi->gregs_valid = 0; | |
2226 | pi->fpregs_valid = 0; | |
2227 | ||
0df8b418 | 2228 | #if 0 /* just try this out... */ |
c3f6f71d JM |
2229 | flags = proc_flags (pi); |
2230 | why = proc_why (pi); | |
2231 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 2232 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
2233 | #endif |
2234 | /* If child is not stopped, wait for it to stop. */ | |
2235 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
2236 | !proc_wait_for_stop (pi)) | |
c906108c | 2237 | { |
0df8b418 | 2238 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 2239 | if (errno == ENOENT) |
c906108c | 2240 | { |
39f77062 KB |
2241 | int wait_retval; |
2242 | ||
0df8b418 | 2243 | /* /proc file not found; presumably child has terminated. */ |
f6ac5f3d | 2244 | wait_retval = ::wait (&wstat); /* "wait" for the child's exit. */ |
c3f6f71d | 2245 | |
dfd4cc63 | 2246 | /* Wrong child? */ |
e99b03dc | 2247 | if (wait_retval != inferior_ptid.pid ()) |
3e43a32a MS |
2248 | error (_("procfs: couldn't stop " |
2249 | "process %d: wait returned %d."), | |
e99b03dc | 2250 | inferior_ptid.pid (), wait_retval); |
c3f6f71d | 2251 | /* FIXME: might I not just use waitpid? |
0df8b418 | 2252 | Or try find_procinfo to see if I know about this child? */ |
f2907e49 | 2253 | retval = ptid_t (wait_retval); |
c906108c | 2254 | } |
d1566ff5 FN |
2255 | else if (errno == EINTR) |
2256 | goto wait_again; | |
c3f6f71d | 2257 | else |
c906108c | 2258 | { |
0df8b418 | 2259 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 2260 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 2261 | } |
c3f6f71d JM |
2262 | } |
2263 | else | |
2264 | { | |
2265 | /* This long block is reached if either: | |
2266 | a) the child was already stopped, or | |
2267 | b) we successfully waited for the child with wait_for_stop. | |
2268 | This block will analyze the /proc status, and translate it | |
2269 | into a waitstatus for GDB. | |
2270 | ||
2271 | If we actually had to call wait because the /proc file | |
19958708 | 2272 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
2273 | because we already have a waitstatus. */ |
2274 | ||
2275 | flags = proc_flags (pi); | |
2276 | why = proc_why (pi); | |
2277 | what = proc_what (pi); | |
2278 | ||
c3f6f71d | 2279 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 2280 | { |
c3f6f71d JM |
2281 | /* If it's running async (for single_thread control), |
2282 | set it back to normal again. */ | |
2283 | if (flags & PR_ASYNC) | |
2284 | if (!proc_unset_async (pi)) | |
2285 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
c3f6f71d JM |
2286 | |
2287 | if (info_verbose) | |
2288 | proc_prettyprint_why (why, what, 1); | |
2289 | ||
2290 | /* The 'pid' we will return to GDB is composed of | |
2291 | the process ID plus the lwp ID. */ | |
fd79271b | 2292 | retval = ptid_t (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
2293 | |
2294 | switch (why) { | |
2295 | case PR_SIGNALLED: | |
2296 | wstat = (what << 8) | 0177; | |
2297 | break; | |
2298 | case PR_SYSENTRY: | |
37de36c6 | 2299 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 2300 | { |
17faa917 DJ |
2301 | if (print_thread_events) |
2302 | printf_unfiltered (_("[%s exited]\n"), | |
2303 | target_pid_to_str (retval)); | |
b7a08269 | 2304 | delete_thread (find_thread_ptid (retval)); |
37de36c6 KB |
2305 | status->kind = TARGET_WAITKIND_SPURIOUS; |
2306 | return retval; | |
2307 | } | |
2308 | else if (syscall_is_exit (pi, what)) | |
2309 | { | |
181e7f93 PA |
2310 | struct inferior *inf; |
2311 | ||
0df8b418 | 2312 | /* Handle SYS_exit call only. */ |
37de36c6 | 2313 | /* Stopped at entry to SYS_exit. |
19958708 | 2314 | Make it runnable, resume it, then use |
37de36c6 | 2315 | the wait system call to get its exit code. |
19958708 | 2316 | Proc_run_process always clears the current |
37de36c6 KB |
2317 | fault and signal. |
2318 | Then return its exit status. */ | |
2319 | pi->status_valid = 0; | |
2320 | wstat = 0; | |
19958708 | 2321 | /* FIXME: what we should do is return |
37de36c6 KB |
2322 | TARGET_WAITKIND_SPURIOUS. */ |
2323 | if (!proc_run_process (pi, 0, 0)) | |
2324 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
2325 | |
2326 | inf = find_inferior_pid (pi->pid); | |
2327 | if (inf->attach_flag) | |
c3f6f71d | 2328 | { |
19958708 | 2329 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
2330 | return a "success" exit code. Bogus: what if |
2331 | it returns something else? */ | |
2332 | wstat = 0; | |
39f77062 | 2333 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
2334 | } |
2335 | else | |
2336 | { | |
f6ac5f3d | 2337 | int temp = ::wait (&wstat); |
37de36c6 KB |
2338 | |
2339 | /* FIXME: shouldn't I make sure I get the right | |
2340 | event from the right process? If (for | |
2341 | instance) I have killed an earlier inferior | |
2342 | process but failed to clean up after it | |
2343 | somehow, I could get its termination event | |
2344 | here. */ | |
2345 | ||
0df8b418 MS |
2346 | /* If wait returns -1, that's what we return |
2347 | to GDB. */ | |
37de36c6 | 2348 | if (temp < 0) |
f2907e49 | 2349 | retval = ptid_t (temp); |
c3f6f71d | 2350 | } |
c3f6f71d | 2351 | } |
37de36c6 KB |
2352 | else |
2353 | { | |
a3f17187 | 2354 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
2355 | proc_prettyprint_syscall (proc_what (pi), 0); |
2356 | printf_filtered ("\n"); | |
44122162 RO |
2357 | |
2358 | long i, nsysargs, *sysargs; | |
2359 | ||
2360 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2361 | (sysargs = proc_sysargs (pi)) != NULL) | |
2362 | { | |
2363 | printf_filtered (_("%ld syscall arguments:\n"), | |
2364 | nsysargs); | |
2365 | for (i = 0; i < nsysargs; i++) | |
2366 | printf_filtered ("#%ld: 0x%08lx\n", | |
2367 | i, sysargs[i]); | |
2368 | } | |
2369 | ||
37de36c6 KB |
2370 | if (status) |
2371 | { | |
0df8b418 MS |
2372 | /* How to exit gracefully, returning "unknown |
2373 | event". */ | |
37de36c6 | 2374 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2375 | return inferior_ptid; |
37de36c6 KB |
2376 | } |
2377 | else | |
2378 | { | |
2379 | /* How to keep going without returning to wfi: */ | |
049a8570 | 2380 | target_continue_no_signal (ptid); |
37de36c6 KB |
2381 | goto wait_again; |
2382 | } | |
2383 | } | |
2384 | break; | |
2385 | case PR_SYSEXIT: | |
2386 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 2387 | { |
37de36c6 KB |
2388 | /* Hopefully this is our own "fork-child" execing |
2389 | the real child. Hoax this event into a trap, and | |
2390 | GDB will see the child about to execute its start | |
0df8b418 | 2391 | address. */ |
37de36c6 KB |
2392 | wstat = (SIGTRAP << 8) | 0177; |
2393 | } | |
2394 | else if (syscall_is_lwp_create (pi, what)) | |
2395 | { | |
77382aee PA |
2396 | /* This syscall is somewhat like fork/exec. We |
2397 | will get the event twice: once for the parent | |
2398 | LWP, and once for the child. We should already | |
2399 | know about the parent LWP, but the child will | |
2400 | be new to us. So, whenever we get this event, | |
2401 | if it represents a new thread, simply add the | |
2402 | thread to the list. */ | |
c3f6f71d | 2403 | |
37de36c6 | 2404 | /* If not in procinfo list, add it. */ |
39f77062 KB |
2405 | temp_tid = proc_get_current_thread (pi); |
2406 | if (!find_procinfo (pi->pid, temp_tid)) | |
2407 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 2408 | |
fd79271b | 2409 | temp_ptid = ptid_t (pi->pid, temp_tid, 0); |
37de36c6 | 2410 | /* If not in GDB's thread list, add it. */ |
39f77062 | 2411 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
2412 | add_thread (temp_ptid); |
2413 | ||
0df8b418 | 2414 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 2415 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2416 | return inferior_ptid; |
37de36c6 KB |
2417 | } |
2418 | else if (syscall_is_lwp_exit (pi, what)) | |
2419 | { | |
17faa917 DJ |
2420 | if (print_thread_events) |
2421 | printf_unfiltered (_("[%s exited]\n"), | |
2422 | target_pid_to_str (retval)); | |
b7a08269 | 2423 | delete_thread (find_thread_ptid (retval)); |
37de36c6 KB |
2424 | status->kind = TARGET_WAITKIND_SPURIOUS; |
2425 | return retval; | |
c3f6f71d | 2426 | } |
37de36c6 KB |
2427 | else if (0) |
2428 | { | |
2429 | /* FIXME: Do we need to handle SYS_sproc, | |
2430 | SYS_fork, or SYS_vfork here? The old procfs | |
2431 | seemed to use this event to handle threads on | |
2432 | older (non-LWP) systems, where I'm assuming | |
19958708 | 2433 | that threads were actually separate processes. |
37de36c6 KB |
2434 | Irix, maybe? Anyway, low priority for now. */ |
2435 | } | |
2436 | else | |
2437 | { | |
a3f17187 | 2438 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
2439 | proc_prettyprint_syscall (proc_what (pi), 0); |
2440 | printf_filtered ("\n"); | |
44122162 RO |
2441 | |
2442 | long i, nsysargs, *sysargs; | |
2443 | ||
2444 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2445 | (sysargs = proc_sysargs (pi)) != NULL) | |
2446 | { | |
2447 | printf_filtered (_("%ld syscall arguments:\n"), | |
2448 | nsysargs); | |
2449 | for (i = 0; i < nsysargs; i++) | |
2450 | printf_filtered ("#%ld: 0x%08lx\n", | |
2451 | i, sysargs[i]); | |
2452 | } | |
2453 | ||
37de36c6 | 2454 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2455 | return inferior_ptid; |
37de36c6 | 2456 | } |
c3f6f71d JM |
2457 | break; |
2458 | case PR_REQUESTED: | |
2459 | #if 0 /* FIXME */ | |
2460 | wstat = (SIGSTOP << 8) | 0177; | |
2461 | break; | |
2462 | #else | |
2463 | if (retry < 5) | |
2464 | { | |
a3f17187 | 2465 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
2466 | pi->status_valid = 0; |
2467 | goto wait_again; | |
2468 | } | |
2469 | else | |
2470 | { | |
2471 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
2472 | temp_tid = proc_get_current_thread (pi); |
2473 | if (!find_procinfo (pi->pid, temp_tid)) | |
2474 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
2475 | |
2476 | /* If not in GDB's thread list, add it. */ | |
fd79271b | 2477 | temp_ptid = ptid_t (pi->pid, temp_tid, 0); |
39f77062 | 2478 | if (!in_thread_list (temp_ptid)) |
93815fbf | 2479 | add_thread (temp_ptid); |
c3f6f71d JM |
2480 | |
2481 | status->kind = TARGET_WAITKIND_STOPPED; | |
b196bc4c | 2482 | status->value.sig = GDB_SIGNAL_0; |
c3f6f71d JM |
2483 | return retval; |
2484 | } | |
2485 | #endif | |
2486 | case PR_JOBCONTROL: | |
2487 | wstat = (what << 8) | 0177; | |
2488 | break; | |
2489 | case PR_FAULTED: | |
7af6341f | 2490 | switch (what) { |
c3f6f71d JM |
2491 | case FLTWATCH: |
2492 | wstat = (SIGTRAP << 8) | 0177; | |
2493 | break; | |
0df8b418 | 2494 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 2495 | case FLTPRIV: |
c3f6f71d | 2496 | case FLTILL: |
c3f6f71d JM |
2497 | wstat = (SIGILL << 8) | 0177; |
2498 | break; | |
2499 | case FLTBPT: | |
c3f6f71d | 2500 | case FLTTRACE: |
c3f6f71d JM |
2501 | wstat = (SIGTRAP << 8) | 0177; |
2502 | break; | |
2503 | case FLTSTACK: | |
2504 | case FLTACCESS: | |
c3f6f71d | 2505 | case FLTBOUNDS: |
c3f6f71d JM |
2506 | wstat = (SIGSEGV << 8) | 0177; |
2507 | break; | |
2508 | case FLTIOVF: | |
2509 | case FLTIZDIV: | |
c3f6f71d | 2510 | case FLTFPE: |
c3f6f71d JM |
2511 | wstat = (SIGFPE << 8) | 0177; |
2512 | break; | |
3e43a32a | 2513 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
2514 | default: /* FIXME: use si_signo if possible for |
2515 | fault. */ | |
f2907e49 | 2516 | retval = ptid_t (-1); |
c3f6f71d | 2517 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 2518 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2519 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2520 | error (_("... giving up...")); |
c3f6f71d JM |
2521 | break; |
2522 | } | |
2523 | break; /* case PR_FAULTED: */ | |
2524 | default: /* switch (why) unmatched */ | |
2525 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 2526 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2527 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2528 | error (_("... giving up...")); |
c3f6f71d JM |
2529 | break; |
2530 | } | |
77382aee PA |
2531 | /* Got this far without error: If retval isn't in the |
2532 | threads database, add it. */ | |
e99b03dc | 2533 | if (retval.pid () > 0 && |
d7e15655 | 2534 | retval != inferior_ptid && |
c3f6f71d | 2535 | !in_thread_list (retval)) |
c906108c | 2536 | { |
77382aee PA |
2537 | /* We have a new thread. We need to add it both to |
2538 | GDB's list and to our own. If we don't create a | |
2539 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 2540 | add_thread (retval); |
e99b03dc | 2541 | if (find_procinfo (retval.pid (), |
e38504b3 | 2542 | retval.lwp ()) == NULL) |
e99b03dc | 2543 | create_procinfo (retval.pid (), |
e38504b3 | 2544 | retval.lwp ()); |
c906108c | 2545 | } |
c906108c | 2546 | } |
0df8b418 | 2547 | else /* Flags do not indicate STOPPED. */ |
c906108c | 2548 | { |
0df8b418 | 2549 | /* surely this can't happen... */ |
c3f6f71d JM |
2550 | printf_filtered ("procfs:%d -- process not stopped.\n", |
2551 | __LINE__); | |
2552 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 2553 | error (_("procfs: ...giving up...")); |
c906108c | 2554 | } |
c906108c | 2555 | } |
c906108c | 2556 | |
c3f6f71d JM |
2557 | if (status) |
2558 | store_waitstatus (status, wstat); | |
c906108c SS |
2559 | } |
2560 | ||
c3f6f71d JM |
2561 | return retval; |
2562 | } | |
c906108c | 2563 | |
4e73f23d RM |
2564 | /* Perform a partial transfer to/from the specified object. For |
2565 | memory transfers, fall back to the old memory xfer functions. */ | |
2566 | ||
f6ac5f3d PA |
2567 | enum target_xfer_status |
2568 | procfs_target::xfer_partial (enum target_object object, | |
2569 | const char *annex, gdb_byte *readbuf, | |
2570 | const gdb_byte *writebuf, ULONGEST offset, | |
2571 | ULONGEST len, ULONGEST *xfered_len) | |
4e73f23d RM |
2572 | { |
2573 | switch (object) | |
2574 | { | |
2575 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 2576 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d | 2577 | |
4e73f23d | 2578 | case TARGET_OBJECT_AUXV: |
f6ac5f3d | 2579 | return memory_xfer_auxv (this, object, annex, readbuf, writebuf, |
9b409511 | 2580 | offset, len, xfered_len); |
4e73f23d RM |
2581 | |
2582 | default: | |
4360561f TT |
2583 | return this->beneath ()->xfer_partial (object, annex, |
2584 | readbuf, writebuf, offset, len, | |
2585 | xfered_len); | |
4e73f23d RM |
2586 | } |
2587 | } | |
2588 | ||
e96027e0 PA |
2589 | /* Helper for procfs_xfer_partial that handles memory transfers. |
2590 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 2591 | |
e96027e0 PA |
2592 | static enum target_xfer_status |
2593 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2594 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
2595 | { |
2596 | procinfo *pi; | |
e96027e0 | 2597 | int nbytes; |
c906108c | 2598 | |
0df8b418 | 2599 | /* Find procinfo for main process. */ |
e99b03dc | 2600 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d JM |
2601 | if (pi->as_fd == 0 && |
2602 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 2603 | { |
c3f6f71d | 2604 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 2605 | return TARGET_XFER_E_IO; |
c906108c | 2606 | } |
c906108c | 2607 | |
e96027e0 PA |
2608 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
2609 | return TARGET_XFER_E_IO; | |
2610 | ||
2611 | if (writebuf != NULL) | |
c906108c | 2612 | { |
e96027e0 PA |
2613 | PROCFS_NOTE ("write memory:\n"); |
2614 | nbytes = write (pi->as_fd, writebuf, len); | |
2615 | } | |
2616 | else | |
2617 | { | |
2618 | PROCFS_NOTE ("read memory:\n"); | |
2619 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 2620 | } |
e96027e0 PA |
2621 | if (nbytes <= 0) |
2622 | return TARGET_XFER_E_IO; | |
2623 | *xfered_len = nbytes; | |
2624 | return TARGET_XFER_OK; | |
c906108c SS |
2625 | } |
2626 | ||
77382aee PA |
2627 | /* Called by target_resume before making child runnable. Mark cached |
2628 | registers and status's invalid. If there are "dirty" caches that | |
2629 | need to be written back to the child process, do that. | |
c906108c | 2630 | |
77382aee PA |
2631 | File descriptors are also cached. As they are a limited resource, |
2632 | we cannot hold onto them indefinitely. However, as they are | |
2633 | expensive to open, we don't want to throw them away | |
2634 | indescriminately either. As a compromise, we will keep the file | |
2635 | descriptors for the parent process, but discard any file | |
2636 | descriptors we may have accumulated for the threads. | |
2637 | ||
2638 | As this function is called by iterate_over_threads, it always | |
2639 | returns zero (so that iterate_over_threads will keep | |
2640 | iterating). */ | |
c3f6f71d JM |
2641 | |
2642 | static int | |
fba45db2 | 2643 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 2644 | { |
77382aee PA |
2645 | /* About to run the child; invalidate caches and do any other |
2646 | cleanup. */ | |
c906108c | 2647 | |
c3f6f71d JM |
2648 | #if 0 |
2649 | if (pi->gregs_dirty) | |
2650 | if (parent == NULL || | |
2651 | proc_get_current_thread (parent) != pi->tid) | |
2652 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
2653 | proc_warn (pi, "target_resume, set_gregs", | |
2654 | __LINE__); | |
f5656ead | 2655 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
2656 | if (pi->fpregs_dirty) |
2657 | if (parent == NULL || | |
2658 | proc_get_current_thread (parent) != pi->tid) | |
2659 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 2660 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 2661 | __LINE__); |
c906108c | 2662 | #endif |
c906108c | 2663 | |
c3f6f71d | 2664 | if (parent != NULL) |
c906108c | 2665 | { |
c3f6f71d | 2666 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 2667 | Close any file descriptors that it might have open. |
c3f6f71d JM |
2668 | We don't do this to the master (parent) procinfo. */ |
2669 | ||
2670 | close_procinfo_files (pi); | |
c906108c | 2671 | } |
c3f6f71d JM |
2672 | pi->gregs_valid = 0; |
2673 | pi->fpregs_valid = 0; | |
2674 | #if 0 | |
2675 | pi->gregs_dirty = 0; | |
2676 | pi->fpregs_dirty = 0; | |
c906108c | 2677 | #endif |
c3f6f71d JM |
2678 | pi->status_valid = 0; |
2679 | pi->threads_valid = 0; | |
c906108c | 2680 | |
c3f6f71d | 2681 | return 0; |
c906108c SS |
2682 | } |
2683 | ||
0fda6bd2 | 2684 | #if 0 |
77382aee PA |
2685 | /* A callback function for iterate_over_threads. Find the |
2686 | asynchronous signal thread, and make it runnable. See if that | |
2687 | helps matters any. */ | |
c906108c | 2688 | |
c3f6f71d | 2689 | static int |
fba45db2 | 2690 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 2691 | { |
c3f6f71d JM |
2692 | #ifdef PR_ASLWP |
2693 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 2694 | { |
c3f6f71d JM |
2695 | if (!proc_run_process (pi, 0, -1)) |
2696 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
2697 | return 1; | |
c906108c | 2698 | } |
c906108c | 2699 | #endif |
c3f6f71d | 2700 | return 0; |
c906108c | 2701 | } |
0fda6bd2 | 2702 | #endif |
c906108c | 2703 | |
77382aee PA |
2704 | /* Make the child process runnable. Normally we will then call |
2705 | procfs_wait and wait for it to stop again (unless gdb is async). | |
2706 | ||
2707 | If STEP is true, then arrange for the child to stop again after | |
2708 | executing a single instruction. If SIGNO is zero, then cancel any | |
2709 | pending signal; if non-zero, then arrange for the indicated signal | |
2710 | to be delivered to the child when it runs. If PID is -1, then | |
2711 | allow any child thread to run; if non-zero, then allow only the | |
2712 | indicated thread to run. (not implemented yet). */ | |
c906108c | 2713 | |
f6ac5f3d PA |
2714 | void |
2715 | procfs_target::resume (ptid_t ptid, int step, enum gdb_signal signo) | |
c906108c | 2716 | { |
c3f6f71d JM |
2717 | procinfo *pi, *thread; |
2718 | int native_signo; | |
2719 | ||
19958708 | 2720 | /* 2.1: |
c3f6f71d | 2721 | prrun.prflags |= PRSVADDR; |
19958708 | 2722 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 2723 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 2724 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
2725 | prrun.prflags |= PRCFAULT; clear current fault. |
2726 | ||
2727 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 2728 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
2729 | PRSVADDR is unnecessary. |
2730 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
2731 | This basically leaves PRSTEP and PRCSIG. | |
2732 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
2733 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 2734 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 2735 | |
0df8b418 | 2736 | /* Find procinfo for main process. */ |
e99b03dc | 2737 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d | 2738 | |
77382aee | 2739 | /* First cut: ignore pid argument. */ |
c3f6f71d | 2740 | errno = 0; |
c906108c | 2741 | |
c3f6f71d JM |
2742 | /* Convert signal to host numbering. */ |
2743 | if (signo == 0 || | |
a493e3e2 | 2744 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
2745 | native_signo = 0; |
2746 | else | |
2ea28649 | 2747 | native_signo = gdb_signal_to_host (signo); |
c906108c | 2748 | |
c3f6f71d | 2749 | pi->ignore_next_sigstop = 0; |
c906108c | 2750 | |
77382aee PA |
2751 | /* Running the process voids all cached registers and status. */ |
2752 | /* Void the threads' caches first. */ | |
19958708 | 2753 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
2754 | /* Void the process procinfo's caches. */ |
2755 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 2756 | |
e99b03dc | 2757 | if (ptid.pid () != -1) |
c906108c | 2758 | { |
77382aee PA |
2759 | /* Resume a specific thread, presumably suppressing the |
2760 | others. */ | |
e38504b3 | 2761 | thread = find_procinfo (ptid.pid (), ptid.lwp ()); |
7de45904 | 2762 | if (thread != NULL) |
c906108c | 2763 | { |
c3f6f71d JM |
2764 | if (thread->tid != 0) |
2765 | { | |
77382aee PA |
2766 | /* We're to resume a specific thread, and not the |
2767 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
2768 | if (!proc_set_async (pi)) |
2769 | proc_error (pi, "target_resume, set_async", __LINE__); | |
c3f6f71d | 2770 | #if 0 |
19958708 | 2771 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
2772 | make_signal_thread_runnable, |
2773 | NULL); | |
2774 | #endif | |
0df8b418 MS |
2775 | pi = thread; /* Substitute the thread's procinfo |
2776 | for run. */ | |
c3f6f71d | 2777 | } |
c906108c SS |
2778 | } |
2779 | } | |
c906108c | 2780 | |
c3f6f71d | 2781 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 2782 | { |
c3f6f71d | 2783 | if (errno == EBUSY) |
77382aee PA |
2784 | warning (_("resume: target already running. " |
2785 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
2786 | else |
2787 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 2788 | } |
c3f6f71d | 2789 | } |
c906108c | 2790 | |
77382aee | 2791 | /* Set up to trace signals in the child process. */ |
c906108c | 2792 | |
f6ac5f3d PA |
2793 | void |
2794 | procfs_target::pass_signals (int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 2795 | { |
44122162 | 2796 | sigset_t signals; |
e99b03dc | 2797 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
2455069d | 2798 | int signo; |
c906108c | 2799 | |
2455069d UW |
2800 | prfillset (&signals); |
2801 | ||
2802 | for (signo = 0; signo < NSIG; signo++) | |
2803 | { | |
2ea28649 | 2804 | int target_signo = gdb_signal_from_host (signo); |
2455069d | 2805 | if (target_signo < numsigs && pass_signals[target_signo]) |
44122162 | 2806 | prdelset (&signals, signo); |
2455069d UW |
2807 | } |
2808 | ||
2809 | if (!proc_set_traced_signals (pi, &signals)) | |
2810 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 2811 | } |
c906108c | 2812 | |
77382aee | 2813 | /* Print status information about the child process. */ |
c906108c | 2814 | |
f6ac5f3d PA |
2815 | void |
2816 | procfs_target::files_info () | |
c3f6f71d | 2817 | { |
181e7f93 | 2818 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 2819 | |
a3f17187 | 2820 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 2821 | inf->attach_flag? "attached": "child", |
39f77062 | 2822 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 2823 | } |
c906108c | 2824 | |
77382aee PA |
2825 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
2826 | should only be applied to the real process, not to an LWP, because | |
2827 | of the check for parent-process. If we need this to work for an | |
2828 | LWP, it needs some more logic. */ | |
c906108c | 2829 | |
c3f6f71d | 2830 | static void |
fba45db2 | 2831 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
2832 | { |
2833 | int parent_pid; | |
c906108c | 2834 | |
c3f6f71d | 2835 | parent_pid = proc_parent_pid (pi); |
c3f6f71d | 2836 | if (!proc_kill (pi, SIGKILL)) |
103b3ef5 | 2837 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d | 2838 | destroy_procinfo (pi); |
c906108c | 2839 | |
c3f6f71d JM |
2840 | /* If pi is GDB's child, wait for it to die. */ |
2841 | if (parent_pid == getpid ()) | |
19958708 | 2842 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
2843 | Should we check the returned event? */ |
2844 | { | |
0d06e24b | 2845 | #if 0 |
c3f6f71d | 2846 | int status, ret; |
c906108c | 2847 | |
c3f6f71d JM |
2848 | ret = waitpid (pi->pid, &status, 0); |
2849 | #else | |
2850 | wait (NULL); | |
2851 | #endif | |
2852 | } | |
2853 | } | |
c906108c | 2854 | |
77382aee PA |
2855 | /* We're done debugging it, and we want it to go away. Then we want |
2856 | GDB to forget all about it. */ | |
c906108c | 2857 | |
f6ac5f3d PA |
2858 | void |
2859 | procfs_target::kill () | |
c906108c | 2860 | { |
d7e15655 | 2861 | if (inferior_ptid != null_ptid) /* ? */ |
c3f6f71d | 2862 | { |
0df8b418 | 2863 | /* Find procinfo for main process. */ |
e99b03dc | 2864 | procinfo *pi = find_procinfo (inferior_ptid.pid (), 0); |
c906108c | 2865 | |
c3f6f71d JM |
2866 | if (pi) |
2867 | unconditionally_kill_inferior (pi); | |
bc1e6c81 | 2868 | target_mourn_inferior (inferior_ptid); |
c906108c | 2869 | } |
c3f6f71d JM |
2870 | } |
2871 | ||
77382aee | 2872 | /* Forget we ever debugged this thing! */ |
c906108c | 2873 | |
f6ac5f3d PA |
2874 | void |
2875 | procfs_target::mourn_inferior () | |
c3f6f71d JM |
2876 | { |
2877 | procinfo *pi; | |
c906108c | 2878 | |
d7e15655 | 2879 | if (inferior_ptid != null_ptid) |
c3f6f71d | 2880 | { |
0df8b418 | 2881 | /* Find procinfo for main process. */ |
e99b03dc | 2882 | pi = find_procinfo (inferior_ptid.pid (), 0); |
c3f6f71d JM |
2883 | if (pi) |
2884 | destroy_procinfo (pi); | |
c906108c | 2885 | } |
6a3cb8e8 PA |
2886 | |
2887 | generic_mourn_inferior (); | |
8181d85f | 2888 | |
f6ac5f3d | 2889 | maybe_unpush_target (); |
c3f6f71d | 2890 | } |
c906108c | 2891 | |
77382aee PA |
2892 | /* When GDB forks to create a runnable inferior process, this function |
2893 | is called on the parent side of the fork. It's job is to do | |
2894 | whatever is necessary to make the child ready to be debugged, and | |
2895 | then wait for the child to synchronize. */ | |
c906108c | 2896 | |
19958708 | 2897 | static void |
28439f5e | 2898 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
2899 | { |
2900 | procinfo *pi; | |
c3f6f71d | 2901 | int fail; |
2689673f | 2902 | int lwpid; |
c906108c | 2903 | |
c3f6f71d JM |
2904 | /* This routine called on the parent side (GDB side) |
2905 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
2906 | if (!target_is_pushed (ops)) |
2907 | push_target (ops); | |
c906108c | 2908 | |
c3f6f71d | 2909 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 2910 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
2911 | |
2912 | if (!open_procinfo_files (pi, FD_CTL)) | |
2913 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
2914 | ||
2915 | /* | |
2916 | xmalloc // done | |
2917 | open_procinfo_files // done | |
2918 | link list // done | |
2919 | prfillset (trace) | |
2920 | procfs_notice_signals | |
2921 | prfillset (fault) | |
2922 | prdelset (FLTPAGE) | |
2923 | PIOCWSTOP | |
2924 | PIOCSFAULT | |
2925 | */ | |
2926 | ||
77382aee | 2927 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
2928 | if (!(proc_flags (pi) & PR_STOPPED) && |
2929 | !(proc_wait_for_stop (pi))) | |
2930 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
2931 | ||
2932 | /* Save some of the /proc state to be restored if we detach. */ | |
2933 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 2934 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
2935 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
2936 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
2937 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2938 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
2939 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2940 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 2941 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 2942 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 2943 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2944 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
2945 | ||
c3f6f71d JM |
2946 | if ((fail = procfs_debug_inferior (pi)) != 0) |
2947 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
2948 | ||
0d06e24b JM |
2949 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
2950 | and possibly even turning ON kill-on-last-close at this point. But | |
2951 | I can't make that change without careful testing which I don't have | |
2952 | time to do right now... */ | |
c3f6f71d JM |
2953 | /* Turn on run-on-last-close flag so that the child |
2954 | will die if GDB goes away for some reason. */ | |
2955 | if (!proc_set_run_on_last_close (pi)) | |
2956 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
2957 | ||
2689673f PA |
2958 | /* We now have have access to the lwpid of the main thread/lwp. */ |
2959 | lwpid = proc_get_current_thread (pi); | |
2960 | ||
2961 | /* Create a procinfo for the main lwp. */ | |
2962 | create_procinfo (pid, lwpid); | |
2963 | ||
2964 | /* We already have a main thread registered in the thread table at | |
2965 | this point, but it didn't have any lwp info yet. Notify the core | |
2966 | about it. This changes inferior_ptid as well. */ | |
f2907e49 | 2967 | thread_change_ptid (ptid_t (pid), |
fd79271b | 2968 | ptid_t (pid, lwpid, 0)); |
c906108c | 2969 | |
2090129c | 2970 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c3f6f71d | 2971 | } |
c906108c | 2972 | |
77382aee PA |
2973 | /* When GDB forks to create a new process, this function is called on |
2974 | the child side of the fork before GDB exec's the user program. Its | |
2975 | job is to make the child minimally debuggable, so that the parent | |
2976 | GDB process can connect to the child and take over. This function | |
2977 | should do only the minimum to make that possible, and to | |
2978 | synchronize with the parent process. The parent process should | |
2979 | take care of the details. */ | |
c3f6f71d JM |
2980 | |
2981 | static void | |
fba45db2 | 2982 | procfs_set_exec_trap (void) |
c3f6f71d JM |
2983 | { |
2984 | /* This routine called on the child side (inferior side) | |
2985 | after GDB forks the inferior. It must use only local variables, | |
2986 | because it may be sharing data space with its parent. */ | |
c906108c | 2987 | |
c3f6f71d | 2988 | procinfo *pi; |
37de36c6 | 2989 | sysset_t *exitset; |
c906108c | 2990 | |
c3f6f71d | 2991 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 2992 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 2993 | |
c3f6f71d JM |
2994 | if (open_procinfo_files (pi, FD_CTL) == 0) |
2995 | { | |
2996 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
2997 | gdb_flush (gdb_stderr); | |
77382aee PA |
2998 | /* No need to call "dead_procinfo", because we're going to |
2999 | exit. */ | |
c3f6f71d JM |
3000 | _exit (127); |
3001 | } | |
c906108c | 3002 | |
44122162 | 3003 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
3004 | /* GW: Rationale... |
3005 | Not all systems with /proc have all the exec* syscalls with the same | |
3006 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 3007 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 3008 | |
37de36c6 | 3009 | exitset = sysset_t_alloc (pi); |
44122162 | 3010 | premptyset (exitset); |
c3f6f71d | 3011 | #ifdef SYS_exec |
44122162 | 3012 | praddset (exitset, SYS_exec); |
c906108c | 3013 | #endif |
44122162 | 3014 | praddset (exitset, SYS_execve); |
37de36c6 KB |
3015 | |
3016 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 3017 | { |
c3f6f71d JM |
3018 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
3019 | gdb_flush (gdb_stderr); | |
3020 | _exit (127); | |
c906108c | 3021 | } |
c3f6f71d | 3022 | |
0df8b418 | 3023 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
3024 | /* Turn off inherit on fork flag so that all grand-children |
3025 | of gdb start with tracing flags cleared. */ | |
3026 | if (!proc_unset_inherit_on_fork (pi)) | |
3027 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
3028 | ||
3029 | /* Turn off run on last close flag, so that the child process | |
3030 | cannot run away just because we close our handle on it. | |
3031 | We want it to wait for the parent to attach. */ | |
3032 | if (!proc_unset_run_on_last_close (pi)) | |
3033 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
3034 | ||
19958708 | 3035 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 3036 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 3037 | /*destroy_procinfo (pi);*/ |
c906108c | 3038 | } |
c906108c | 3039 | |
77382aee PA |
3040 | /* This function is called BEFORE gdb forks the inferior process. Its |
3041 | only real responsibility is to set things up for the fork, and tell | |
3042 | GDB which two functions to call after the fork (one for the parent, | |
3043 | and one for the child). | |
3044 | ||
3045 | This function does a complicated search for a unix shell program, | |
3046 | which it then uses to parse arguments and environment variables to | |
3047 | be sent to the child. I wonder whether this code could not be | |
3048 | abstracted out and shared with other unix targets such as | |
3049 | inf-ptrace? */ | |
c906108c | 3050 | |
f6ac5f3d PA |
3051 | void |
3052 | procfs_target::create_inferior (const char *exec_file, | |
3053 | const std::string &allargs, | |
3054 | char **env, int from_tty) | |
c906108c SS |
3055 | { |
3056 | char *shell_file = getenv ("SHELL"); | |
3057 | char *tryname; | |
28439f5e PA |
3058 | int pid; |
3059 | ||
c906108c SS |
3060 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
3061 | { | |
3062 | ||
3063 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
3064 | just do this the normal way (via execlp, which operates by |
3065 | attempting an exec for each element of the PATH until it | |
3066 | finds one which succeeds), then there will be an exec for | |
3067 | each failed attempt, each of which will cause a PR_SYSEXIT | |
3068 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
3069 | for these failed execs with the ones for successful execs | |
3070 | (whether the exec has succeeded is stored at that time in the | |
3071 | carry bit or some such architecture-specific and | |
3072 | non-ABI-specified place). | |
3073 | ||
3074 | So I can't think of anything better than to search the PATH | |
3075 | now. This has several disadvantages: (1) There is a race | |
3076 | condition; if we find a file now and it is deleted before we | |
3077 | exec it, we lose, even if the deletion leaves a valid file | |
3078 | further down in the PATH, (2) there is no way to know exactly | |
3079 | what an executable (in the sense of "capable of being | |
3080 | exec'd") file is. Using access() loses because it may lose | |
3081 | if the caller is the superuser; failing to use it loses if | |
3082 | there are ACLs or some such. */ | |
c906108c | 3083 | |
995816ba PA |
3084 | const char *p; |
3085 | const char *p1; | |
c906108c | 3086 | /* FIXME-maybe: might want "set path" command so user can change what |
c3f6f71d | 3087 | path is used from within GDB. */ |
995816ba | 3088 | const char *path = getenv ("PATH"); |
c906108c SS |
3089 | int len; |
3090 | struct stat statbuf; | |
3091 | ||
3092 | if (path == NULL) | |
3093 | path = "/bin:/usr/bin"; | |
3094 | ||
b196bc4c | 3095 | tryname = (char *) alloca (strlen (path) + strlen (shell_file) + 2); |
c3f6f71d | 3096 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
3097 | { |
3098 | p1 = strchr (p, ':'); | |
3099 | if (p1 != NULL) | |
3100 | len = p1 - p; | |
3101 | else | |
3102 | len = strlen (p); | |
3103 | strncpy (tryname, p, len); | |
3104 | tryname[len] = '\0'; | |
3105 | strcat (tryname, "/"); | |
3106 | strcat (tryname, shell_file); | |
3107 | if (access (tryname, X_OK) < 0) | |
3108 | continue; | |
3109 | if (stat (tryname, &statbuf) < 0) | |
3110 | continue; | |
3111 | if (!S_ISREG (statbuf.st_mode)) | |
3112 | /* We certainly need to reject directories. I'm not quite | |
3113 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
3114 | that people want to exec() these things. */ | |
3115 | continue; | |
3116 | break; | |
3117 | } | |
3118 | if (p == NULL) | |
3119 | /* Not found. This must be an error rather than merely passing | |
3120 | the file to execlp(), because execlp() would try all the | |
3121 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 3122 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 3123 | __LINE__, shell_file); |
c906108c SS |
3124 | |
3125 | shell_file = tryname; | |
3126 | } | |
3127 | ||
28439f5e | 3128 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 3129 | NULL, NULL, shell_file, NULL); |
28439f5e | 3130 | |
2090129c SDJ |
3131 | /* We have something that executes now. We'll be running through |
3132 | the shell at this point (if startup-with-shell is true), but the | |
3133 | pid shouldn't change. */ | |
f2907e49 | 3134 | add_thread_silent (ptid_t (pid)); |
2090129c | 3135 | |
f6ac5f3d | 3136 | procfs_init_inferior (this, pid); |
27087a3d JB |
3137 | } |
3138 | ||
3139 | /* An observer for the "inferior_created" event. */ | |
c906108c | 3140 | |
27087a3d JB |
3141 | static void |
3142 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
3143 | { | |
c906108c SS |
3144 | } |
3145 | ||
e8032dde | 3146 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 3147 | |
c3f6f71d | 3148 | static int |
fba45db2 | 3149 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 3150 | { |
fd79271b | 3151 | ptid_t gdb_threadid = ptid_t (pi->pid, thread->tid, 0); |
c906108c | 3152 | |
2689673f | 3153 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 3154 | add_thread (gdb_threadid); |
c906108c | 3155 | |
c3f6f71d JM |
3156 | return 0; |
3157 | } | |
3158 | ||
77382aee PA |
3159 | /* Query all the threads that the target knows about, and give them |
3160 | back to GDB to add to its list. */ | |
c3f6f71d | 3161 | |
f6ac5f3d PA |
3162 | void |
3163 | procfs_target::update_thread_list () | |
c3f6f71d JM |
3164 | { |
3165 | procinfo *pi; | |
3166 | ||
e8032dde PA |
3167 | prune_threads (); |
3168 | ||
0df8b418 | 3169 | /* Find procinfo for main process. */ |
e99b03dc | 3170 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d JM |
3171 | proc_update_threads (pi); |
3172 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
3173 | } |
3174 | ||
77382aee PA |
3175 | /* Return true if the thread is still 'alive'. This guy doesn't |
3176 | really seem to be doing his job. Got to investigate how to tell | |
3177 | when a thread is really gone. */ | |
c906108c | 3178 | |
57810aa7 | 3179 | bool |
f6ac5f3d | 3180 | procfs_target::thread_alive (ptid_t ptid) |
c906108c | 3181 | { |
c3f6f71d JM |
3182 | int proc, thread; |
3183 | procinfo *pi; | |
c906108c | 3184 | |
e99b03dc | 3185 | proc = ptid.pid (); |
e38504b3 | 3186 | thread = ptid.lwp (); |
0df8b418 | 3187 | /* If I don't know it, it ain't alive! */ |
c3f6f71d | 3188 | if ((pi = find_procinfo (proc, thread)) == NULL) |
57810aa7 | 3189 | return false; |
c3f6f71d JM |
3190 | |
3191 | /* If I can't get its status, it ain't alive! | |
3192 | What's more, I need to forget about it! */ | |
3193 | if (!proc_get_status (pi)) | |
3194 | { | |
3195 | destroy_procinfo (pi); | |
57810aa7 | 3196 | return false; |
c3f6f71d | 3197 | } |
77382aee PA |
3198 | /* I couldn't have got its status if it weren't alive, so it's |
3199 | alive. */ | |
57810aa7 | 3200 | return true; |
c906108c | 3201 | } |
c3f6f71d | 3202 | |
77382aee PA |
3203 | /* Convert PTID to a string. Returns the string in a static |
3204 | buffer. */ | |
c3f6f71d | 3205 | |
f6ac5f3d PA |
3206 | const char * |
3207 | procfs_target::pid_to_str (ptid_t ptid) | |
c3f6f71d JM |
3208 | { |
3209 | static char buf[80]; | |
c3f6f71d | 3210 | |
e38504b3 | 3211 | if (ptid.lwp () == 0) |
e99b03dc | 3212 | sprintf (buf, "process %d", ptid.pid ()); |
c3f6f71d | 3213 | else |
e38504b3 | 3214 | sprintf (buf, "LWP %ld", ptid.lwp ()); |
5240ceac MK |
3215 | |
3216 | return buf; | |
c3f6f71d JM |
3217 | } |
3218 | ||
4206c05e RO |
3219 | /* Accepts an integer PID; Returns a string representing a file that |
3220 | can be opened to get the symbols for the child process. */ | |
3221 | ||
3222 | char * | |
3223 | procfs_target::pid_to_exec_file (int pid) | |
3224 | { | |
3225 | static char buf[PATH_MAX]; | |
3226 | char name[PATH_MAX]; | |
3227 | ||
3228 | /* Solaris 11 introduced /proc/<proc-id>/execname. */ | |
3229 | xsnprintf (name, PATH_MAX, "/proc/%d/execname", pid); | |
3230 | scoped_fd fd (gdb_open_cloexec (name, O_RDONLY, 0)); | |
3231 | if (fd.get () < 0 || read (fd.get (), buf, PATH_MAX - 1) < 0) | |
3232 | { | |
3233 | /* If that fails, fall back to /proc/<proc-id>/path/a.out introduced in | |
3234 | Solaris 10. */ | |
3235 | ssize_t len; | |
3236 | ||
3237 | xsnprintf (name, PATH_MAX, "/proc/%d/path/a.out", pid); | |
3238 | len = readlink (name, buf, PATH_MAX - 1); | |
3239 | if (len <= 0) | |
3240 | strcpy (buf, name); | |
3241 | else | |
3242 | buf[len] = '\0'; | |
3243 | } | |
3244 | ||
3245 | return buf; | |
3246 | } | |
3247 | ||
77382aee | 3248 | /* Insert a watchpoint. */ |
c3f6f71d | 3249 | |
a0911fd0 | 3250 | static int |
39f77062 | 3251 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 3252 | int after) |
c906108c | 3253 | { |
c3f6f71d | 3254 | int pflags = 0; |
19958708 | 3255 | procinfo *pi; |
c3f6f71d | 3256 | |
e99b03dc TT |
3257 | pi = find_procinfo_or_die (ptid.pid () == -1 ? |
3258 | inferior_ptid.pid () : ptid.pid (), | |
dfd4cc63 | 3259 | 0); |
c3f6f71d | 3260 | |
0df8b418 MS |
3261 | /* Translate from GDB's flags to /proc's. */ |
3262 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 3263 | { |
0df8b418 | 3264 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
3265 | case hw_write: /* default watchpoint (write) */ |
3266 | pflags = WRITE_WATCHFLAG; | |
3267 | break; | |
3268 | case hw_read: /* read watchpoint */ | |
3269 | pflags = READ_WATCHFLAG; | |
3270 | break; | |
3271 | case hw_access: /* access watchpoint */ | |
3272 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
3273 | break; | |
3274 | case hw_execute: /* execution HW breakpoint */ | |
3275 | pflags = EXEC_WATCHFLAG; | |
3276 | break; | |
0df8b418 | 3277 | default: /* Something weird. Return error. */ |
c906108c | 3278 | return -1; |
c3f6f71d | 3279 | } |
0df8b418 | 3280 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
3281 | pflags |= AFTER_WATCHFLAG; |
3282 | } | |
3283 | ||
3284 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
3285 | { | |
0df8b418 | 3286 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
3287 | return -1; /* fail */ |
3288 | /* GDB may try to remove the same watchpoint twice. | |
3289 | If a remove request returns no match, don't error. */ | |
c906108c | 3290 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
3291 | return 0; /* ignore */ |
3292 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c SS |
3293 | } |
3294 | return 0; | |
3295 | } | |
3296 | ||
1e03ad20 KB |
3297 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
3298 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
3299 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
3300 | far. | |
19958708 | 3301 | |
1e03ad20 KB |
3302 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
3303 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 3304 | target_can_use_hardware_watchpoint. */ |
1e03ad20 | 3305 | |
f6ac5f3d PA |
3306 | int |
3307 | procfs_target::can_use_hw_breakpoint (enum bptype type, int cnt, int othertype) | |
1e03ad20 | 3308 | { |
1e03ad20 KB |
3309 | /* Due to the way that proc_set_watchpoint() is implemented, host |
3310 | and target pointers must be of the same size. If they are not, | |
3311 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
3312 | fact that proc_set_watchpoint() calls |
3313 | procfs_address_to_host_pointer(); a close inspection of | |
3314 | procfs_address_to_host_pointer will reveal that an internal error | |
3315 | will be generated when the host and target pointer sizes are | |
3316 | different. */ | |
f5656ead | 3317 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 3318 | |
4e906f53 | 3319 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
3320 | return 0; |
3321 | ||
3322 | /* Other tests here??? */ | |
3323 | ||
3324 | return 1; | |
1e03ad20 KB |
3325 | } |
3326 | ||
77382aee PA |
3327 | /* Returns non-zero if process is stopped on a hardware watchpoint |
3328 | fault, else returns zero. */ | |
c3f6f71d | 3329 | |
57810aa7 | 3330 | bool |
f6ac5f3d | 3331 | procfs_target::stopped_by_watchpoint () |
c906108c | 3332 | { |
c3f6f71d | 3333 | procinfo *pi; |
c906108c | 3334 | |
e99b03dc | 3335 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
aaeb7efa | 3336 | |
c3f6f71d | 3337 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3338 | { |
c3f6f71d | 3339 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 3340 | { |
c3f6f71d | 3341 | if (proc_what (pi) == FLTWATCH) |
57810aa7 | 3342 | return true; |
c3f6f71d | 3343 | } |
c906108c | 3344 | } |
57810aa7 | 3345 | return false; |
c906108c | 3346 | } |
c906108c | 3347 | |
77382aee PA |
3348 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
3349 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
3350 | address. This function is only called if | |
3351 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
3352 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c | 3353 | |
57810aa7 | 3354 | bool |
f6ac5f3d | 3355 | procfs_target::stopped_data_address (CORE_ADDR *addr) |
bf701c2c PM |
3356 | { |
3357 | procinfo *pi; | |
3358 | ||
e99b03dc | 3359 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
bf701c2c PM |
3360 | return proc_watchpoint_address (pi, addr); |
3361 | } | |
3362 | ||
f6ac5f3d PA |
3363 | int |
3364 | procfs_target::insert_watchpoint (CORE_ADDR addr, int len, | |
3365 | enum target_hw_bp_type type, | |
3366 | struct expression *cond) | |
25513619 | 3367 | { |
d92524f1 | 3368 | if (!target_have_steppable_watchpoint |
f5656ead | 3369 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
3370 | { |
3371 | /* When a hardware watchpoint fires off the PC will be left at | |
3372 | the instruction following the one which caused the | |
3373 | watchpoint. It will *NOT* be necessary for GDB to step over | |
3374 | the watchpoint. */ | |
3375 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
3376 | } | |
3377 | else | |
3378 | { | |
3379 | /* When a hardware watchpoint fires off the PC will be left at | |
3380 | the instruction which caused the watchpoint. It will be | |
3381 | necessary for GDB to step over the watchpoint. */ | |
3382 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
3383 | } | |
3384 | } | |
3385 | ||
f6ac5f3d PA |
3386 | int |
3387 | procfs_target::remove_watchpoint (CORE_ADDR addr, int len, | |
3388 | enum target_hw_bp_type type, | |
3389 | struct expression *cond) | |
25513619 PA |
3390 | { |
3391 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
3392 | } | |
3393 | ||
f6ac5f3d PA |
3394 | int |
3395 | procfs_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
25513619 PA |
3396 | { |
3397 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
3398 | system can support "thousands" of hardware watchpoints, but gives | |
3399 | no method for finding out how many; It doesn't say anything about | |
3400 | the allowed size for the watched area either. So we just tell | |
3401 | GDB 'yes'. */ | |
3402 | return 1; | |
3403 | } | |
3404 | ||
77382aee PA |
3405 | /* Memory Mappings Functions: */ |
3406 | ||
3407 | /* Call a callback function once for each mapping, passing it the | |
3408 | mapping, an optional secondary callback function, and some optional | |
3409 | opaque data. Quit and return the first non-zero value returned | |
3410 | from the callback. | |
3411 | ||
3412 | PI is the procinfo struct for the process to be mapped. FUNC is | |
3413 | the callback function to be called by this iterator. DATA is the | |
3414 | optional opaque data to be passed to the callback function. | |
3415 | CHILD_FUNC is the optional secondary function pointer to be passed | |
3416 | to the child function. Returns the first non-zero return value | |
3417 | from the callback function, or zero. */ | |
831e682e MS |
3418 | |
3419 | static int | |
b8edc417 | 3420 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 3421 | void *data, |
19958708 | 3422 | int (*func) (struct prmap *map, |
b8edc417 | 3423 | find_memory_region_ftype child_func, |
831e682e MS |
3424 | void *data)) |
3425 | { | |
3426 | char pathname[MAX_PROC_NAME_SIZE]; | |
3427 | struct prmap *prmaps; | |
3428 | struct prmap *prmap; | |
3429 | int funcstat; | |
831e682e | 3430 | int nmap; |
831e682e | 3431 | struct stat sbuf; |
831e682e | 3432 | |
19958708 | 3433 | /* Get the number of mappings, allocate space, |
831e682e | 3434 | and read the mappings into prmaps. */ |
0df8b418 | 3435 | /* Open map fd. */ |
831e682e | 3436 | sprintf (pathname, "/proc/%d/map", pi->pid); |
831e682e | 3437 | |
5dc1a704 TT |
3438 | scoped_fd map_fd (open (pathname, O_RDONLY)); |
3439 | if (map_fd.get () < 0) | |
3440 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
831e682e | 3441 | |
19958708 | 3442 | /* Use stat to determine the file size, and compute |
831e682e | 3443 | the number of prmap_t objects it contains. */ |
5dc1a704 | 3444 | if (fstat (map_fd.get (), &sbuf) != 0) |
831e682e MS |
3445 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); |
3446 | ||
3447 | nmap = sbuf.st_size / sizeof (prmap_t); | |
3448 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5dc1a704 | 3449 | if (read (map_fd.get (), (char *) prmaps, nmap * sizeof (*prmaps)) |
831e682e MS |
3450 | != (nmap * sizeof (*prmaps))) |
3451 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
831e682e MS |
3452 | |
3453 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
3454 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5dc1a704 | 3455 | return funcstat; |
831e682e MS |
3456 | |
3457 | return 0; | |
3458 | } | |
3459 | ||
77382aee | 3460 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 3461 | function for each memory region. |
77382aee | 3462 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
3463 | |
3464 | static int | |
19958708 | 3465 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 3466 | find_memory_region_ftype func, void *data) |
be4d1333 | 3467 | { |
bf75638e | 3468 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 3469 | map->pr_size, |
be4d1333 MS |
3470 | (map->pr_mflags & MA_READ) != 0, |
3471 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 3472 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 3473 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
3474 | data); |
3475 | } | |
3476 | ||
77382aee PA |
3477 | /* External interface. Calls a callback function once for each |
3478 | mapped memory region in the child process, passing as arguments: | |
3479 | ||
3480 | CORE_ADDR virtual_address, | |
3481 | unsigned long size, | |
3482 | int read, TRUE if region is readable by the child | |
3483 | int write, TRUE if region is writable by the child | |
3484 | int execute TRUE if region is executable by the child. | |
3485 | ||
3486 | Stops iterating and returns the first non-zero value returned by | |
3487 | the callback. */ | |
be4d1333 | 3488 | |
f6ac5f3d PA |
3489 | int |
3490 | procfs_target::find_memory_regions (find_memory_region_ftype func, void *data) | |
be4d1333 | 3491 | { |
e99b03dc | 3492 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
be4d1333 | 3493 | |
19958708 | 3494 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
3495 | find_memory_regions_callback); |
3496 | } | |
3497 | ||
77382aee | 3498 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 3499 | |
388faa48 | 3500 | static char * |
5ae5f592 | 3501 | mappingflags (long flags) |
388faa48 MS |
3502 | { |
3503 | static char asciiflags[8]; | |
3504 | ||
3505 | strcpy (asciiflags, "-------"); | |
388faa48 MS |
3506 | if (flags & MA_STACK) |
3507 | asciiflags[1] = 's'; | |
3508 | if (flags & MA_BREAK) | |
3509 | asciiflags[2] = 'b'; | |
3510 | if (flags & MA_SHARED) | |
3511 | asciiflags[3] = 's'; | |
3512 | if (flags & MA_READ) | |
3513 | asciiflags[4] = 'r'; | |
3514 | if (flags & MA_WRITE) | |
3515 | asciiflags[5] = 'w'; | |
3516 | if (flags & MA_EXEC) | |
3517 | asciiflags[6] = 'x'; | |
3518 | return (asciiflags); | |
3519 | } | |
3520 | ||
77382aee PA |
3521 | /* Callback function, does the actual work for 'info proc |
3522 | mappings'. */ | |
831e682e | 3523 | |
831e682e | 3524 | static int |
b8edc417 | 3525 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 3526 | void *unused) |
831e682e | 3527 | { |
0b62613e | 3528 | unsigned int pr_off; |
831e682e | 3529 | |
0b62613e | 3530 | pr_off = (unsigned int) map->pr_offset; |
0b62613e | 3531 | |
f5656ead | 3532 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 3533 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
3534 | (unsigned long) map->pr_vaddr, |
3535 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3536 | (unsigned long) map->pr_size, |
0b62613e PA |
3537 | pr_off, |
3538 | mappingflags (map->pr_mflags)); | |
3539 | else | |
f6a96b83 | 3540 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
3541 | (unsigned long) map->pr_vaddr, |
3542 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3543 | (unsigned long) map->pr_size, |
0b62613e PA |
3544 | pr_off, |
3545 | mappingflags (map->pr_mflags)); | |
831e682e MS |
3546 | |
3547 | return 0; | |
3548 | } | |
3549 | ||
77382aee | 3550 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
3551 | |
3552 | static void | |
3553 | info_proc_mappings (procinfo *pi, int summary) | |
3554 | { | |
388faa48 | 3555 | if (summary) |
0df8b418 | 3556 | return; /* No output for summary mode. */ |
388faa48 | 3557 | |
a3f17187 | 3558 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 3559 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
3560 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
3561 | "Start Addr", | |
3562 | " End Addr", | |
3563 | " Size", | |
3564 | " Offset", | |
3565 | "Flags"); | |
3566 | else | |
3567 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3568 | "Start Addr", | |
3569 | " End Addr", | |
3570 | " Size", | |
3571 | " Offset", | |
3572 | "Flags"); | |
388faa48 | 3573 | |
831e682e | 3574 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
3575 | printf_filtered ("\n"); |
3576 | } | |
3577 | ||
77382aee | 3578 | /* Implement the "info proc" command. */ |
c3f6f71d | 3579 | |
f6ac5f3d PA |
3580 | bool |
3581 | procfs_target::info_proc (const char *args, enum info_proc_what what) | |
c906108c | 3582 | { |
388faa48 MS |
3583 | procinfo *process = NULL; |
3584 | procinfo *thread = NULL; | |
388faa48 MS |
3585 | char *tmp = NULL; |
3586 | int pid = 0; | |
3587 | int tid = 0; | |
3588 | int mappings = 0; | |
c906108c | 3589 | |
145b16a9 UW |
3590 | switch (what) |
3591 | { | |
3592 | case IP_MINIMAL: | |
3593 | break; | |
3594 | ||
3595 | case IP_MAPPINGS: | |
3596 | case IP_ALL: | |
3597 | mappings = 1; | |
3598 | break; | |
3599 | ||
3600 | default: | |
3601 | error (_("Not supported on this target.")); | |
3602 | } | |
3603 | ||
773a1edc | 3604 | gdb_argv built_argv (args); |
4fa7574e | 3605 | for (char *arg : built_argv) |
c3f6f71d | 3606 | { |
773a1edc | 3607 | if (isdigit (arg[0])) |
c3f6f71d | 3608 | { |
773a1edc | 3609 | pid = strtoul (arg, &tmp, 10); |
c3f6f71d JM |
3610 | if (*tmp == '/') |
3611 | tid = strtoul (++tmp, NULL, 10); | |
3612 | } | |
773a1edc | 3613 | else if (arg[0] == '/') |
c3f6f71d | 3614 | { |
773a1edc | 3615 | tid = strtoul (arg + 1, NULL, 10); |
c3f6f71d | 3616 | } |
c3f6f71d | 3617 | } |
5b4cbbe3 TT |
3618 | |
3619 | procinfo_up temporary_procinfo; | |
c3f6f71d | 3620 | if (pid == 0) |
e99b03dc | 3621 | pid = inferior_ptid.pid (); |
c3f6f71d | 3622 | if (pid == 0) |
8a3fe4f8 | 3623 | error (_("No current process: you must name one.")); |
c3f6f71d | 3624 | else |
c906108c | 3625 | { |
c3f6f71d | 3626 | /* Have pid, will travel. |
0df8b418 | 3627 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
3628 | process = find_procinfo (pid, 0); |
3629 | if (process == NULL) | |
3630 | { | |
19958708 | 3631 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
3632 | remember to close it again when finished. */ |
3633 | process = create_procinfo (pid, 0); | |
5b4cbbe3 | 3634 | temporary_procinfo.reset (process); |
c3f6f71d JM |
3635 | if (!open_procinfo_files (process, FD_CTL)) |
3636 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
3637 | } | |
c906108c | 3638 | } |
c3f6f71d JM |
3639 | if (tid != 0) |
3640 | thread = create_procinfo (pid, tid); | |
3641 | ||
3642 | if (process) | |
3643 | { | |
a3f17187 | 3644 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
3645 | proc_prettyprint_flags (proc_flags (process), 1); |
3646 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
3647 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
3648 | if (proc_get_nthreads (process) > 1) | |
19958708 | 3649 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
3650 | proc_get_nthreads (process)); |
3651 | } | |
3652 | if (thread) | |
3653 | { | |
a3f17187 | 3654 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
3655 | proc_prettyprint_flags (proc_flags (thread), 1); |
3656 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
3657 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
3658 | } | |
3659 | ||
388faa48 MS |
3660 | if (mappings) |
3661 | { | |
3662 | info_proc_mappings (process, 0); | |
3663 | } | |
3664 | ||
f6ac5f3d | 3665 | return true; |
c906108c SS |
3666 | } |
3667 | ||
9185ddce JB |
3668 | /* Modify the status of the system call identified by SYSCALLNUM in |
3669 | the set of syscalls that are currently traced/debugged. | |
3670 | ||
3671 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 3672 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 3673 | |
0df8b418 | 3674 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
3675 | will be disabled. */ |
3676 | ||
3677 | static void | |
3678 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 3679 | int mode, int from_tty) |
9185ddce JB |
3680 | { |
3681 | sysset_t *sysset; | |
77382aee | 3682 | |
9185ddce JB |
3683 | if (entry_or_exit == PR_SYSENTRY) |
3684 | sysset = proc_get_traced_sysentry (pi, NULL); | |
3685 | else | |
3686 | sysset = proc_get_traced_sysexit (pi, NULL); | |
3687 | ||
3688 | if (sysset == NULL) | |
3689 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
3690 | ||
3691 | if (mode == FLAG_SET) | |
44122162 | 3692 | praddset (sysset, syscallnum); |
9185ddce | 3693 | else |
44122162 | 3694 | prdelset (sysset, syscallnum); |
9185ddce JB |
3695 | |
3696 | if (entry_or_exit == PR_SYSENTRY) | |
3697 | { | |
3698 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 3699 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
3700 | } |
3701 | else | |
3702 | { | |
3703 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 3704 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
3705 | } |
3706 | } | |
3707 | ||
c3f6f71d | 3708 | static void |
0b39b52e | 3709 | proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 3710 | { |
c3f6f71d | 3711 | procinfo *pi; |
c906108c | 3712 | |
e99b03dc | 3713 | if (inferior_ptid.pid () <= 0) |
8a3fe4f8 | 3714 | error (_("you must be debugging a process to use this command.")); |
c906108c | 3715 | |
c3f6f71d | 3716 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 3717 | error_no_arg (_("system call to trace")); |
c3f6f71d | 3718 | |
e99b03dc | 3719 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d JM |
3720 | if (isdigit (args[0])) |
3721 | { | |
9185ddce | 3722 | const int syscallnum = atoi (args); |
c906108c | 3723 | |
9185ddce | 3724 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
3725 | } |
3726 | } | |
3727 | ||
19958708 | 3728 | static void |
0b39b52e | 3729 | proc_trace_sysentry_cmd (const char *args, int from_tty) |
c906108c | 3730 | { |
c3f6f71d JM |
3731 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
3732 | } | |
c906108c | 3733 | |
19958708 | 3734 | static void |
0b39b52e | 3735 | proc_trace_sysexit_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3736 | { |
3737 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 3738 | } |
c906108c | 3739 | |
19958708 | 3740 | static void |
0b39b52e | 3741 | proc_untrace_sysentry_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3742 | { |
3743 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
3744 | } | |
3745 | ||
19958708 | 3746 | static void |
0b39b52e | 3747 | proc_untrace_sysexit_cmd (const char *args, int from_tty) |
c906108c | 3748 | { |
c3f6f71d JM |
3749 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
3750 | } | |
c906108c | 3751 | |
c906108c | 3752 | void |
fba45db2 | 3753 | _initialize_procfs (void) |
c906108c | 3754 | { |
76727919 | 3755 | gdb::observers::inferior_created.attach (procfs_inferior_created); |
27087a3d | 3756 | |
19958708 | 3757 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 3758 | _("Give a trace of entries into the syscall.")); |
19958708 | 3759 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 3760 | _("Give a trace of exits from the syscall.")); |
19958708 | 3761 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 3762 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 3763 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 3764 | _("Cancel a trace of exits from the syscall.")); |
c1955e17 | 3765 | |
62c808ae | 3766 | add_inf_child_target (&the_procfs_target); |
c3f6f71d JM |
3767 | } |
3768 | ||
3769 | /* =================== END, GDB "MODULE" =================== */ | |
3770 | ||
3771 | ||
3772 | ||
77382aee PA |
3773 | /* miscellaneous stubs: */ |
3774 | ||
3775 | /* The following satisfy a few random symbols mostly created by the | |
3776 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 3777 | |
77382aee PA |
3778 | /* Return a pid for which we guarantee we will be able to find a |
3779 | 'live' procinfo. */ | |
c3f6f71d | 3780 | |
39f77062 | 3781 | ptid_t |
fba45db2 | 3782 | procfs_first_available (void) |
c3f6f71d | 3783 | { |
f2907e49 | 3784 | return ptid_t (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 3785 | } |
be4d1333 MS |
3786 | |
3787 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
3788 | ||
3789 | static char * | |
19958708 | 3790 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 3791 | char *note_data, int *note_size, |
2ea28649 | 3792 | enum gdb_signal stop_signal) |
be4d1333 | 3793 | { |
594f7785 | 3794 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
3795 | gdb_gregset_t gregs; |
3796 | gdb_fpregset_t fpregs; | |
3797 | unsigned long merged_pid; | |
3798 | ||
e38504b3 | 3799 | merged_pid = ptid.lwp () << 16 | ptid.pid (); |
be4d1333 | 3800 | |
75125405 DJ |
3801 | /* This part is the old method for fetching registers. |
3802 | It should be replaced by the newer one using regsets | |
3803 | once it is implemented in this platform: | |
29082443 | 3804 | gdbarch_iterate_over_regset_sections(). */ |
75125405 | 3805 | |
2989a365 | 3806 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
75125405 DJ |
3807 | inferior_ptid = ptid; |
3808 | target_fetch_registers (regcache, -1); | |
3809 | ||
594f7785 | 3810 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
3811 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
3812 | note_data, | |
3813 | note_size, | |
19958708 | 3814 | merged_pid, |
65554fef MS |
3815 | stop_signal, |
3816 | &gregs); | |
594f7785 | 3817 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
3818 | note_data = (char *) elfcore_write_prfpreg (obfd, |
3819 | note_data, | |
3820 | note_size, | |
3821 | &fpregs, | |
3822 | sizeof (fpregs)); | |
75125405 | 3823 | |
be4d1333 MS |
3824 | return note_data; |
3825 | } | |
3826 | ||
3827 | struct procfs_corefile_thread_data { | |
3828 | bfd *obfd; | |
3829 | char *note_data; | |
3830 | int *note_size; | |
2ea28649 | 3831 | enum gdb_signal stop_signal; |
be4d1333 MS |
3832 | }; |
3833 | ||
3834 | static int | |
65554fef | 3835 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 | 3836 | { |
b196bc4c RO |
3837 | struct procfs_corefile_thread_data *args |
3838 | = (struct procfs_corefile_thread_data *) data; | |
be4d1333 | 3839 | |
2689673f | 3840 | if (pi != NULL) |
be4d1333 | 3841 | { |
fd79271b | 3842 | ptid_t ptid = ptid_t (pi->pid, thread->tid, 0); |
f4a14ae6 | 3843 | |
75125405 | 3844 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 3845 | args->note_data, |
2020b7ab PA |
3846 | args->note_size, |
3847 | args->stop_signal); | |
be4d1333 MS |
3848 | } |
3849 | return 0; | |
3850 | } | |
3851 | ||
a223f1e7 JB |
3852 | static int |
3853 | find_signalled_thread (struct thread_info *info, void *data) | |
3854 | { | |
a493e3e2 | 3855 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
e99b03dc | 3856 | && info->ptid.pid () == inferior_ptid.pid ()) |
a223f1e7 JB |
3857 | return 1; |
3858 | ||
3859 | return 0; | |
3860 | } | |
3861 | ||
2ea28649 | 3862 | static enum gdb_signal |
a223f1e7 JB |
3863 | find_stop_signal (void) |
3864 | { | |
3865 | struct thread_info *info = | |
3866 | iterate_over_threads (find_signalled_thread, NULL); | |
3867 | ||
3868 | if (info) | |
16c381f0 | 3869 | return info->suspend.stop_signal; |
a223f1e7 | 3870 | else |
a493e3e2 | 3871 | return GDB_SIGNAL_0; |
a223f1e7 JB |
3872 | } |
3873 | ||
f6ac5f3d PA |
3874 | char * |
3875 | procfs_target::make_corefile_notes (bfd *obfd, int *note_size) | |
be4d1333 | 3876 | { |
be4d1333 | 3877 | gdb_gregset_t gregs; |
be4d1333 MS |
3878 | char fname[16] = {'\0'}; |
3879 | char psargs[80] = {'\0'}; | |
e99b03dc | 3880 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
be4d1333 | 3881 | char *note_data = NULL; |
cbaaa0ca | 3882 | const char *inf_args; |
be4d1333 | 3883 | struct procfs_corefile_thread_data thread_args; |
2ea28649 | 3884 | enum gdb_signal stop_signal; |
be4d1333 MS |
3885 | |
3886 | if (get_exec_file (0)) | |
3887 | { | |
9f37bbcc | 3888 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
3889 | fname[sizeof (fname) - 1] = 0; |
3890 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
3891 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
3892 | |
3893 | inf_args = get_inferior_args (); | |
3894 | if (inf_args && *inf_args && | |
3895 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 3896 | { |
19958708 | 3897 | strncat (psargs, " ", |
be4d1333 | 3898 | sizeof (psargs) - strlen (psargs)); |
19958708 | 3899 | strncat (psargs, inf_args, |
be4d1333 MS |
3900 | sizeof (psargs) - strlen (psargs)); |
3901 | } | |
3902 | } | |
3903 | ||
19958708 RM |
3904 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
3905 | note_data, | |
3906 | note_size, | |
3907 | fname, | |
be4d1333 MS |
3908 | psargs); |
3909 | ||
651c8d2d PA |
3910 | stop_signal = find_stop_signal (); |
3911 | ||
3e3420f6 PA |
3912 | fill_gregset (get_current_regcache (), &gregs, -1); |
3913 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
e99b03dc | 3914 | inferior_ptid.pid (), |
3e3420f6 | 3915 | stop_signal, &gregs); |
3e3420f6 | 3916 | |
be4d1333 MS |
3917 | thread_args.obfd = obfd; |
3918 | thread_args.note_data = note_data; | |
3919 | thread_args.note_size = note_size; | |
651c8d2d | 3920 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
3921 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
3922 | &thread_args); | |
2689673f | 3923 | note_data = thread_args.note_data; |
be4d1333 | 3924 | |
62c808ae RO |
3925 | gdb::optional<gdb::byte_vector> auxv = |
3926 | target_read_alloc (current_top_target (), TARGET_OBJECT_AUXV, NULL); | |
3927 | if (auxv && !auxv->empty ()) | |
3928 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
3929 | "CORE", NT_AUXV, auxv->data (), | |
3930 | auxv->size ()); | |
4e73f23d | 3931 | |
be4d1333 MS |
3932 | return note_data; |
3933 | } | |
be4d1333 | 3934 | /* =================== END GCORE .NOTE "MODULE" =================== */ |