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44122162 | 1 | /* Machine independent support for Solaris /proc (process file system) for GDB. |
2555fe1a | 2 | |
b811d2c2 | 3 | Copyright (C) 1999-2020 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" |
0d12e84c | 34 | #include "gdbarch.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> | |
268a13a5 | 41 | #include "gdbsupport/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" |
268a13a5 TT |
49 | #include "gdbsupport/scoped_fd.h" |
50 | #include "gdbsupport/pathstuff.h" | |
0fda6bd2 | 51 | |
77382aee PA |
52 | /* This module provides the interface between GDB and the |
53 | /proc file system, which is used on many versions of Unix | |
54 | as a means for debuggers to control other processes. | |
55 | ||
77382aee PA |
56 | /proc works by imitating a file system: you open a simulated file |
57 | that represents the process you wish to interact with, and perform | |
58 | operations on that "file" in order to examine or change the state | |
59 | of the other process. | |
60 | ||
61 | The most important thing to know about /proc and this module is | |
62 | that there are two very different interfaces to /proc: | |
63 | ||
64 | One that uses the ioctl system call, and another that uses read | |
65 | and write system calls. | |
66 | ||
44122162 RO |
67 | This module supports only the Solaris version of the read/write |
68 | interface. */ | |
77382aee | 69 | |
c906108c | 70 | #include <sys/types.h> |
2978b111 | 71 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
c906108c | 72 | |
c3f6f71d JM |
73 | #include <fcntl.h> /* for O_RDONLY */ |
74 | #include <unistd.h> /* for "X_OK" */ | |
53ce3c39 | 75 | #include <sys/stat.h> /* for struct stat */ |
c906108c | 76 | |
103b3ef5 MS |
77 | /* Note: procfs-utils.h must be included after the above system header |
78 | files, because it redefines various system calls using macros. | |
79 | This may be incompatible with the prototype declarations. */ | |
80 | ||
103b3ef5 MS |
81 | #include "proc-utils.h" |
82 | ||
77382aee | 83 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
84 | #include "gregset.h" |
85 | ||
c3f6f71d | 86 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 87 | |
77382aee | 88 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 89 | |
f6ac5f3d | 90 | |
e96027e0 PA |
91 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
92 | const gdb_byte *, | |
93 | ULONGEST, ULONGEST, | |
94 | ULONGEST *); | |
a14ed312 | 95 | |
f6ac5f3d PA |
96 | class procfs_target final : public inf_child_target |
97 | { | |
98 | public: | |
99 | void create_inferior (const char *, const std::string &, | |
100 | char **, int) override; | |
101 | ||
102 | void kill () override; | |
103 | ||
104 | void mourn_inferior () override; | |
105 | ||
106 | void attach (const char *, int) override; | |
107 | void detach (inferior *inf, int) override; | |
108 | ||
109 | void resume (ptid_t, int, enum gdb_signal) override; | |
110 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
111 | ||
112 | void fetch_registers (struct regcache *, int) override; | |
113 | void store_registers (struct regcache *, int) override; | |
114 | ||
115 | enum target_xfer_status xfer_partial (enum target_object object, | |
116 | const char *annex, | |
117 | gdb_byte *readbuf, | |
118 | const gdb_byte *writebuf, | |
119 | ULONGEST offset, ULONGEST len, | |
120 | ULONGEST *xfered_len) override; | |
121 | ||
adc6a863 | 122 | void pass_signals (gdb::array_view<const unsigned char>) override; |
a14ed312 | 123 | |
f6ac5f3d | 124 | void files_info () override; |
c3f6f71d | 125 | |
f6ac5f3d | 126 | void update_thread_list () override; |
be4d1333 | 127 | |
57810aa7 | 128 | bool thread_alive (ptid_t ptid) override; |
be4d1333 | 129 | |
a068643d | 130 | std::string pid_to_str (ptid_t) override; |
1e03ad20 | 131 | |
4206c05e RO |
132 | char *pid_to_exec_file (int pid) override; |
133 | ||
f6ac5f3d PA |
134 | thread_control_capabilities get_thread_control_capabilities () override |
135 | { return tc_schedlock; } | |
145b16a9 | 136 | |
f6ac5f3d PA |
137 | /* find_memory_regions support method for gcore */ |
138 | int find_memory_regions (find_memory_region_ftype func, void *data) | |
139 | override; | |
b5c8fcb1 | 140 | |
f6ac5f3d | 141 | char *make_corefile_notes (bfd *, int *) override; |
b5c8fcb1 | 142 | |
f6ac5f3d PA |
143 | bool info_proc (const char *, enum info_proc_what) override; |
144 | ||
c475f569 | 145 | #if PR_MODEL_NATIVE == PR_MODEL_LP64 |
f6ac5f3d PA |
146 | int auxv_parse (gdb_byte **readptr, |
147 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
148 | override; | |
149 | #endif | |
150 | ||
57810aa7 | 151 | bool stopped_by_watchpoint () override; |
f6ac5f3d PA |
152 | |
153 | int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
154 | struct expression *) override; | |
155 | ||
156 | int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
157 | struct expression *) override; | |
158 | ||
159 | int region_ok_for_hw_watchpoint (CORE_ADDR, int) override; | |
160 | ||
161 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
57810aa7 | 162 | bool stopped_data_address (CORE_ADDR *) override; |
5b6d1e4f PA |
163 | |
164 | void procfs_init_inferior (int pid); | |
f6ac5f3d | 165 | }; |
b5c8fcb1 | 166 | |
f6ac5f3d | 167 | static procfs_target the_procfs_target; |
b5c8fcb1 | 168 | |
c475f569 | 169 | #if PR_MODEL_NATIVE == PR_MODEL_LP64 |
77382aee PA |
170 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
171 | is presented in 64-bit format. We need to provide a custom parser | |
172 | to handle that. */ | |
f6ac5f3d PA |
173 | int |
174 | procfs_target::auxv_parse (gdb_byte **readptr, | |
175 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
c47ffbe3 | 176 | { |
f5656ead | 177 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
178 | gdb_byte *ptr = *readptr; |
179 | ||
180 | if (endptr == ptr) | |
181 | return 0; | |
77382aee | 182 | |
c47ffbe3 VP |
183 | if (endptr - ptr < 8 * 2) |
184 | return -1; | |
185 | ||
e17a4113 | 186 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
187 | ptr += 8; |
188 | /* The size of data is always 64-bit. If the application is 32-bit, | |
189 | it will be zero extended, as expected. */ | |
e17a4113 | 190 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
191 | ptr += 8; |
192 | ||
193 | *readptr = ptr; | |
194 | return 1; | |
195 | } | |
196 | #endif | |
197 | ||
c3f6f71d JM |
198 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
199 | ||
77382aee PA |
200 | /* World Unification: |
201 | ||
202 | Put any typedefs, defines etc. here that are required for the | |
203 | unification of code that handles different versions of /proc. */ | |
c3f6f71d | 204 | |
44122162 RO |
205 | enum { READ_WATCHFLAG = WA_READ, |
206 | WRITE_WATCHFLAG = WA_WRITE, | |
207 | EXEC_WATCHFLAG = WA_EXEC, | |
208 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
209 | }; | |
c3f6f71d JM |
210 | |
211 | ||
212 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
213 | ||
214 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
215 | ||
216 | /* The procinfo struct is a wrapper to hold all the state information | |
217 | concerning a /proc process. There should be exactly one procinfo | |
218 | for each process, and since GDB currently can debug only one | |
219 | process at a time, that means there should be only one procinfo. | |
220 | All of the LWP's of a process can be accessed indirectly thru the | |
221 | single process procinfo. | |
222 | ||
223 | However, against the day when GDB may debug more than one process, | |
224 | this data structure is kept in a list (which for now will hold no | |
225 | more than one member), and many functions will have a pointer to a | |
226 | procinfo as an argument. | |
227 | ||
228 | There will be a separate procinfo structure for use by the (not yet | |
229 | implemented) "info proc" command, so that we can print useful | |
230 | information about any random process without interfering with the | |
0df8b418 | 231 | inferior's procinfo information. */ |
c3f6f71d | 232 | |
c3f6f71d | 233 | /* format strings for /proc paths */ |
44122162 RO |
234 | #define MAIN_PROC_NAME_FMT "/proc/%d" |
235 | #define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
236 | #define AS_PROC_NAME_FMT "/proc/%d/as" | |
237 | #define MAP_PROC_NAME_FMT "/proc/%d/map" | |
238 | #define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
13db92d3 | 239 | #define MAX_PROC_NAME_SIZE sizeof("/proc/999999/lwp/0123456789/lwpstatus") |
c906108c | 240 | |
c3f6f71d JM |
241 | typedef struct procinfo { |
242 | struct procinfo *next; | |
243 | int pid; /* Process ID */ | |
244 | int tid; /* Thread/LWP id */ | |
c906108c | 245 | |
c3f6f71d JM |
246 | /* process state */ |
247 | int was_stopped; | |
248 | int ignore_next_sigstop; | |
c906108c | 249 | |
c3f6f71d | 250 | int ctl_fd; /* File descriptor for /proc control file */ |
c3f6f71d JM |
251 | int status_fd; /* File descriptor for /proc status file */ |
252 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 253 | |
c3f6f71d | 254 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 255 | |
c3f6f71d | 256 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
44122162 RO |
257 | sigset_t saved_sigset; /* Saved traced signal set */ |
258 | sigset_t saved_sighold; /* Saved held signal set */ | |
37de36c6 KB |
259 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
260 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 261 | |
44122162 | 262 | pstatus_t prstatus; /* Current process status info */ |
19958708 | 263 | |
c3f6f71d | 264 | struct procinfo *thread_list; |
c906108c | 265 | |
c3f6f71d JM |
266 | int status_valid : 1; |
267 | int gregs_valid : 1; | |
268 | int fpregs_valid : 1; | |
269 | int threads_valid: 1; | |
270 | } procinfo; | |
c906108c | 271 | |
c3f6f71d | 272 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 273 | |
c3f6f71d | 274 | /* Function prototypes for procinfo module: */ |
c906108c | 275 | |
a14ed312 KB |
276 | static procinfo *find_procinfo_or_die (int pid, int tid); |
277 | static procinfo *find_procinfo (int pid, int tid); | |
278 | static procinfo *create_procinfo (int pid, int tid); | |
44122162 | 279 | static void destroy_procinfo (procinfo *p); |
44122162 RO |
280 | static void dead_procinfo (procinfo *p, const char *msg, int killp); |
281 | static int open_procinfo_files (procinfo *p, int which); | |
282 | static void close_procinfo_files (procinfo *p); | |
c906108c | 283 | |
e9ef4f39 | 284 | static int iterate_over_mappings |
b8edc417 JK |
285 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
286 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 287 | void *data)); |
e9ef4f39 | 288 | |
c3f6f71d | 289 | /* The head of the procinfo list: */ |
44122162 | 290 | static procinfo *procinfo_list; |
c906108c | 291 | |
77382aee PA |
292 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
293 | not found. */ | |
c906108c | 294 | |
19958708 | 295 | static procinfo * |
fba45db2 | 296 | find_procinfo (int pid, int tid) |
c5aa993b | 297 | { |
c3f6f71d | 298 | procinfo *pi; |
c906108c | 299 | |
c3f6f71d JM |
300 | for (pi = procinfo_list; pi; pi = pi->next) |
301 | if (pi->pid == pid) | |
302 | break; | |
c906108c | 303 | |
c3f6f71d JM |
304 | if (pi) |
305 | if (tid) | |
306 | { | |
307 | /* Don't check threads_valid. If we're updating the | |
308 | thread_list, we want to find whatever threads are already | |
309 | here. This means that in general it is the caller's | |
310 | responsibility to check threads_valid and update before | |
311 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 312 | thread. */ |
c3f6f71d JM |
313 | |
314 | for (pi = pi->thread_list; pi; pi = pi->next) | |
315 | if (pi->tid == tid) | |
316 | break; | |
317 | } | |
c906108c | 318 | |
c3f6f71d JM |
319 | return pi; |
320 | } | |
c906108c | 321 | |
77382aee | 322 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 323 | |
c3f6f71d | 324 | static procinfo * |
fba45db2 | 325 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
326 | { |
327 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 328 | |
c3f6f71d | 329 | if (pi == NULL) |
0fda6bd2 JM |
330 | { |
331 | if (tid) | |
3e43a32a MS |
332 | error (_("procfs: couldn't find pid %d " |
333 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
334 | pid, tid); |
335 | else | |
8a3fe4f8 | 336 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 337 | } |
c3f6f71d JM |
338 | return pi; |
339 | } | |
c906108c | 340 | |
77382aee PA |
341 | /* Wrapper for `open'. The appropriate open call is attempted; if |
342 | unsuccessful, it will be retried as many times as needed for the | |
343 | EAGAIN and EINTR conditions. | |
19958708 | 344 | |
77382aee PA |
345 | For other conditions, retry the open a limited number of times. In |
346 | addition, a short sleep is imposed prior to retrying the open. The | |
347 | reason for this sleep is to give the kernel a chance to catch up | |
348 | and create the file in question in the event that GDB "wins" the | |
349 | race to open a file before the kernel has created it. */ | |
19958708 | 350 | |
4d1bcd09 KB |
351 | static int |
352 | open_with_retry (const char *pathname, int flags) | |
353 | { | |
354 | int retries_remaining, status; | |
355 | ||
356 | retries_remaining = 2; | |
357 | ||
358 | while (1) | |
359 | { | |
360 | status = open (pathname, flags); | |
361 | ||
362 | if (status >= 0 || retries_remaining == 0) | |
363 | break; | |
364 | else if (errno != EINTR && errno != EAGAIN) | |
365 | { | |
366 | retries_remaining--; | |
367 | sleep (1); | |
368 | } | |
369 | } | |
370 | ||
371 | return status; | |
372 | } | |
373 | ||
44122162 RO |
374 | /* Open the file descriptor for the process or LWP. We only open the |
375 | control file descriptor; the others are opened lazily as needed. | |
77382aee | 376 | Returns the file descriptor, or zero for failure. */ |
c906108c | 377 | |
c3f6f71d | 378 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 379 | |
c3f6f71d | 380 | static int |
fba45db2 | 381 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d JM |
382 | { |
383 | char tmp[MAX_PROC_NAME_SIZE]; | |
384 | int fd; | |
385 | ||
77382aee PA |
386 | /* This function is getting ALMOST long enough to break up into |
387 | several. Here is some rationale: | |
388 | ||
77382aee | 389 | There are several file descriptors that may need to be open |
85102364 | 390 | for any given process or LWP. The ones we're interested in are: |
77382aee PA |
391 | - control (ctl) write-only change the state |
392 | - status (status) read-only query the state | |
393 | - address space (as) read/write access memory | |
394 | - map (map) read-only virtual addr map | |
395 | Most of these are opened lazily as they are needed. | |
396 | The pathnames for the 'files' for an LWP look slightly | |
397 | different from those of a first-class process: | |
398 | Pathnames for a process (<proc-id>): | |
399 | /proc/<proc-id>/ctl | |
400 | /proc/<proc-id>/status | |
401 | /proc/<proc-id>/as | |
402 | /proc/<proc-id>/map | |
403 | Pathnames for an LWP (lwp-id): | |
404 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
405 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
406 | An LWP has no map or address space file descriptor, since | |
44122162 RO |
407 | the memory map and address space are shared by all LWPs. */ |
408 | ||
77382aee PA |
409 | /* In this case, there are several different file descriptors that |
410 | we might be asked to open. The control file descriptor will be | |
411 | opened early, but the others will be opened lazily as they are | |
412 | needed. */ | |
c3f6f71d JM |
413 | |
414 | strcpy (tmp, pi->pathname); | |
0df8b418 | 415 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
416 | case FD_CTL: |
417 | if (pi->tid) | |
418 | strcat (tmp, "/lwpctl"); | |
419 | else | |
420 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 421 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 422 | if (fd < 0) |
c3f6f71d JM |
423 | return 0; /* fail */ |
424 | pi->ctl_fd = fd; | |
425 | break; | |
426 | case FD_AS: | |
427 | if (pi->tid) | |
0df8b418 | 428 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 429 | strcat (tmp, "/as"); |
4d1bcd09 | 430 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 431 | if (fd < 0) |
c3f6f71d JM |
432 | return 0; /* fail */ |
433 | pi->as_fd = fd; | |
434 | break; | |
435 | case FD_STATUS: | |
436 | if (pi->tid) | |
437 | strcat (tmp, "/lwpstatus"); | |
438 | else | |
439 | strcat (tmp, "/status"); | |
4d1bcd09 | 440 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 441 | if (fd < 0) |
c3f6f71d JM |
442 | return 0; /* fail */ |
443 | pi->status_fd = fd; | |
444 | break; | |
445 | default: | |
446 | return 0; /* unknown file descriptor */ | |
447 | } | |
c906108c | 448 | |
c3f6f71d JM |
449 | return 1; /* success */ |
450 | } | |
c906108c | 451 | |
77382aee PA |
452 | /* Allocate a data structure and link it into the procinfo list. |
453 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
454 | pointer to new procinfo struct. */ | |
c906108c | 455 | |
c3f6f71d | 456 | static procinfo * |
fba45db2 | 457 | create_procinfo (int pid, int tid) |
c3f6f71d | 458 | { |
0b62613e | 459 | procinfo *pi, *parent = NULL; |
c906108c | 460 | |
c475f569 RO |
461 | pi = find_procinfo (pid, tid); |
462 | if (pi != NULL) | |
0df8b418 | 463 | return pi; /* Already exists, nothing to do. */ |
c906108c | 464 | |
0df8b418 | 465 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
466 | if (tid != 0) |
467 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
468 | create it if it | |
0df8b418 | 469 | doesn't exist yet? */ |
c906108c | 470 | |
8d749320 | 471 | pi = XNEW (procinfo); |
c3f6f71d JM |
472 | memset (pi, 0, sizeof (procinfo)); |
473 | pi->pid = pid; | |
474 | pi->tid = tid; | |
c906108c | 475 | |
c475f569 RO |
476 | pi->saved_entryset = XNEW (sysset_t); |
477 | pi->saved_exitset = XNEW (sysset_t); | |
1d5e0602 | 478 | |
c3f6f71d JM |
479 | /* Chain into list. */ |
480 | if (tid == 0) | |
481 | { | |
c475f569 | 482 | xsnprintf (pi->pathname, sizeof (pi->pathname), MAIN_PROC_NAME_FMT, pid); |
c3f6f71d JM |
483 | pi->next = procinfo_list; |
484 | procinfo_list = pi; | |
485 | } | |
486 | else | |
487 | { | |
c475f569 RO |
488 | xsnprintf (pi->pathname, sizeof (pi->pathname), "/proc/%d/lwp/%d", |
489 | pid, tid); | |
c3f6f71d JM |
490 | pi->next = parent->thread_list; |
491 | parent->thread_list = pi; | |
492 | } | |
493 | return pi; | |
494 | } | |
c906108c | 495 | |
77382aee | 496 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 497 | |
c3f6f71d | 498 | static void |
fba45db2 | 499 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
500 | { |
501 | if (pi->ctl_fd > 0) | |
502 | close (pi->ctl_fd); | |
c3f6f71d JM |
503 | if (pi->as_fd > 0) |
504 | close (pi->as_fd); | |
505 | if (pi->status_fd > 0) | |
506 | close (pi->status_fd); | |
c3f6f71d JM |
507 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
508 | } | |
c906108c | 509 | |
77382aee | 510 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 511 | |
c3f6f71d | 512 | static void |
fba45db2 | 513 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
514 | { |
515 | procinfo *ptr; | |
516 | ||
77382aee | 517 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
518 | if (pi == *list) |
519 | *list = pi->next; | |
19958708 | 520 | else |
c3f6f71d JM |
521 | for (ptr = *list; ptr; ptr = ptr->next) |
522 | if (ptr->next == pi) | |
523 | { | |
524 | ptr->next = pi->next; | |
525 | break; | |
526 | } | |
7a292a7a | 527 | |
77382aee | 528 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 529 | close_procinfo_files (pi); |
7a292a7a | 530 | |
77382aee | 531 | /* Step three: free the memory. */ |
1d5e0602 KB |
532 | xfree (pi->saved_entryset); |
533 | xfree (pi->saved_exitset); | |
b8c9b27d | 534 | xfree (pi); |
c3f6f71d | 535 | } |
c906108c | 536 | |
c3f6f71d | 537 | static void |
fba45db2 | 538 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
539 | { |
540 | procinfo *tmp; | |
c906108c | 541 | |
0df8b418 | 542 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 543 | { |
0df8b418 | 544 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
545 | destroy_one_procinfo (&tmp->thread_list, pi); |
546 | } | |
0df8b418 | 547 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
548 | { |
549 | /* First destroy the children, if any; */ | |
550 | while (pi->thread_list != NULL) | |
551 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
552 | /* Then destroy the parent. Genocide!!! */ | |
553 | destroy_one_procinfo (&procinfo_list, pi); | |
554 | } | |
555 | } | |
c906108c | 556 | |
5b4cbbe3 TT |
557 | /* A deleter that calls destroy_procinfo. */ |
558 | struct procinfo_deleter | |
004527cb | 559 | { |
5b4cbbe3 TT |
560 | void operator() (procinfo *pi) const |
561 | { | |
562 | destroy_procinfo (pi); | |
563 | } | |
564 | }; | |
565 | ||
566 | typedef std::unique_ptr<procinfo, procinfo_deleter> procinfo_up; | |
004527cb | 567 | |
c3f6f71d | 568 | enum { NOKILL, KILL }; |
c906108c | 569 | |
77382aee PA |
570 | /* To be called on a non_recoverable error for a procinfo. Prints |
571 | error messages, optionally sends a SIGKILL to the process, then | |
572 | destroys the data structure. */ | |
c906108c | 573 | |
c3f6f71d | 574 | static void |
995816ba | 575 | dead_procinfo (procinfo *pi, const char *msg, int kill_p) |
c3f6f71d JM |
576 | { |
577 | char procfile[80]; | |
c906108c | 578 | |
c3f6f71d | 579 | if (pi->pathname) |
c475f569 | 580 | print_sys_errmsg (pi->pathname, errno); |
c3f6f71d JM |
581 | else |
582 | { | |
c475f569 | 583 | xsnprintf (procfile, sizeof (procfile), "process %d", pi->pid); |
c3f6f71d JM |
584 | print_sys_errmsg (procfile, errno); |
585 | } | |
586 | if (kill_p == KILL) | |
587 | kill (pi->pid, SIGKILL); | |
c906108c | 588 | |
c3f6f71d | 589 | destroy_procinfo (pi); |
0b62613e | 590 | error ("%s", msg); |
c3f6f71d | 591 | } |
c906108c | 592 | |
c3f6f71d | 593 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 594 | |
c3f6f71d | 595 | /* =================== /proc "MODULE" =================== */ |
c906108c | 596 | |
77382aee PA |
597 | /* This "module" is the interface layer between the /proc system API |
598 | and the gdb target vector functions. This layer consists of access | |
599 | functions that encapsulate each of the basic operations that we | |
600 | need to use from the /proc API. | |
601 | ||
602 | The main motivation for this layer is to hide the fact that there | |
603 | are two very different implementations of the /proc API. Rather | |
604 | than have a bunch of #ifdefs all thru the gdb target vector | |
605 | functions, we do our best to hide them all in here. */ | |
c906108c | 606 | |
44122162 RO |
607 | static long proc_flags (procinfo *pi); |
608 | static int proc_why (procinfo *pi); | |
609 | static int proc_what (procinfo *pi); | |
610 | static int proc_set_current_signal (procinfo *pi, int signo); | |
611 | static int proc_get_current_thread (procinfo *pi); | |
d3581e61 | 612 | static int proc_iterate_over_threads |
44122162 | 613 | (procinfo *pi, |
d3581e61 JB |
614 | int (*func) (procinfo *, procinfo *, void *), |
615 | void *ptr); | |
616 | ||
617 | static void | |
995816ba | 618 | proc_warn (procinfo *pi, const char *func, int line) |
c3f6f71d | 619 | { |
c475f569 RO |
620 | xsnprintf (errmsg, sizeof (errmsg), "procfs: %s line %d, %s", |
621 | func, line, pi->pathname); | |
c3f6f71d JM |
622 | print_sys_errmsg (errmsg, errno); |
623 | } | |
c906108c | 624 | |
d3581e61 | 625 | static void |
995816ba | 626 | proc_error (procinfo *pi, const char *func, int line) |
c3f6f71d | 627 | { |
c475f569 RO |
628 | xsnprintf (errmsg, sizeof (errmsg), "procfs: %s line %d, %s", |
629 | func, line, pi->pathname); | |
c3f6f71d JM |
630 | perror_with_name (errmsg); |
631 | } | |
c906108c | 632 | |
77382aee PA |
633 | /* Updates the status struct in the procinfo. There is a 'valid' |
634 | flag, to let other functions know when this function needs to be | |
635 | called (so the status is only read when it is needed). The status | |
636 | file descriptor is also only opened when it is needed. Returns | |
637 | non-zero for success, zero for failure. */ | |
c906108c | 638 | |
d3581e61 | 639 | static int |
fba45db2 | 640 | proc_get_status (procinfo *pi) |
c3f6f71d | 641 | { |
0df8b418 | 642 | /* Status file descriptor is opened "lazily". */ |
c475f569 | 643 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) |
c3f6f71d JM |
644 | { |
645 | pi->status_valid = 0; | |
646 | return 0; | |
647 | } | |
c906108c | 648 | |
c3f6f71d JM |
649 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
650 | pi->status_valid = 0; /* fail */ | |
651 | else | |
652 | { | |
19958708 | 653 | /* Sigh... I have to read a different data structure, |
0df8b418 | 654 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 655 | if (pi->tid) |
19958708 RM |
656 | pi->status_valid = (read (pi->status_fd, |
657 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
658 | sizeof (lwpstatus_t)) |
659 | == sizeof (lwpstatus_t)); | |
660 | else | |
661 | { | |
19958708 | 662 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d | 663 | (char *) &pi->prstatus, |
44122162 RO |
664 | sizeof (pstatus_t)) |
665 | == sizeof (pstatus_t)); | |
c3f6f71d JM |
666 | } |
667 | } | |
c906108c | 668 | |
c3f6f71d JM |
669 | if (pi->status_valid) |
670 | { | |
19958708 | 671 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 672 | proc_why (pi), |
19958708 | 673 | proc_what (pi), |
c3f6f71d JM |
674 | proc_get_current_thread (pi)); |
675 | } | |
c906108c | 676 | |
77382aee | 677 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d | 678 | pi->gregs_valid = pi->status_valid; |
77382aee PA |
679 | /* In the read/write multiple-fd model, the status struct includes |
680 | the fp regs too, so mark them valid too. */ | |
c3f6f71d | 681 | pi->fpregs_valid = pi->status_valid; |
77382aee | 682 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 683 | } |
c906108c | 684 | |
77382aee | 685 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 686 | |
d3581e61 | 687 | static long |
fba45db2 | 688 | proc_flags (procinfo *pi) |
c3f6f71d JM |
689 | { |
690 | if (!pi->status_valid) | |
691 | if (!proc_get_status (pi)) | |
0df8b418 | 692 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 693 | |
c3f6f71d | 694 | return pi->prstatus.pr_lwp.pr_flags; |
c3f6f71d | 695 | } |
c906108c | 696 | |
77382aee | 697 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 698 | |
d3581e61 | 699 | static int |
fba45db2 | 700 | proc_why (procinfo *pi) |
c3f6f71d JM |
701 | { |
702 | if (!pi->status_valid) | |
703 | if (!proc_get_status (pi)) | |
0df8b418 | 704 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 705 | |
c3f6f71d | 706 | return pi->prstatus.pr_lwp.pr_why; |
c3f6f71d | 707 | } |
c906108c | 708 | |
77382aee | 709 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 710 | |
d3581e61 | 711 | static int |
fba45db2 | 712 | proc_what (procinfo *pi) |
c3f6f71d JM |
713 | { |
714 | if (!pi->status_valid) | |
715 | if (!proc_get_status (pi)) | |
0df8b418 | 716 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 717 | |
c3f6f71d | 718 | return pi->prstatus.pr_lwp.pr_what; |
c3f6f71d | 719 | } |
c906108c | 720 | |
77382aee PA |
721 | /* This function is only called when PI is stopped by a watchpoint. |
722 | Assuming the OS supports it, write to *ADDR the data address which | |
723 | triggered it and return 1. Return 0 if it is not possible to know | |
724 | the address. */ | |
bf701c2c PM |
725 | |
726 | static int | |
727 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
728 | { | |
729 | if (!pi->status_valid) | |
730 | if (!proc_get_status (pi)) | |
731 | return 0; | |
732 | ||
f5656ead TT |
733 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
734 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c | 735 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
bf701c2c PM |
736 | return 1; |
737 | } | |
738 | ||
77382aee PA |
739 | /* Returns the pr_nsysarg field (number of args to the current |
740 | syscall). */ | |
c3f6f71d | 741 | |
d3581e61 | 742 | static int |
fba45db2 | 743 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
744 | { |
745 | if (!pi->status_valid) | |
746 | if (!proc_get_status (pi)) | |
747 | return 0; | |
19958708 | 748 | |
c3f6f71d | 749 | return pi->prstatus.pr_lwp.pr_nsysarg; |
c3f6f71d | 750 | } |
c906108c | 751 | |
77382aee PA |
752 | /* Returns the pr_sysarg field (pointer to the arguments of current |
753 | syscall). */ | |
c906108c | 754 | |
d3581e61 | 755 | static long * |
fba45db2 | 756 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
757 | { |
758 | if (!pi->status_valid) | |
759 | if (!proc_get_status (pi)) | |
760 | return NULL; | |
19958708 | 761 | |
c3f6f71d | 762 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
c3f6f71d | 763 | } |
77382aee | 764 | |
44122162 | 765 | /* Set or reset any of the following process flags: |
77382aee PA |
766 | PR_FORK -- forked child will inherit trace flags |
767 | PR_RLC -- traced process runs when last /proc file closed. | |
768 | PR_KLC -- traced process is killed when last /proc file closed. | |
769 | PR_ASYNC -- LWP's get to run/stop independently. | |
770 | ||
44122162 | 771 | This function is done using read/write [PCSET/PCRESET/PCUNSET]. |
77382aee PA |
772 | |
773 | Arguments: | |
774 | pi -- the procinfo | |
775 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
776 | mode -- 1 for set, 0 for reset. | |
777 | ||
778 | Returns non-zero for success, zero for failure. */ | |
c906108c | 779 | |
c3f6f71d | 780 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 781 | |
c3f6f71d | 782 | static int |
fba45db2 | 783 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
784 | { |
785 | long win = 0; /* default to fail */ | |
786 | ||
77382aee PA |
787 | /* These operations affect the process as a whole, and applying them |
788 | to an individual LWP has the same meaning as applying them to the | |
789 | main process. Therefore, if we're ever called with a pointer to | |
790 | an LWP's procinfo, let's substitute the process's procinfo and | |
791 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
792 | |
793 | if (pi->pid != 0) | |
794 | pi = find_procinfo_or_die (pi->pid, 0); | |
795 | ||
44122162 | 796 | procfs_ctl_t arg[2]; |
c5aa993b | 797 | |
44122162 RO |
798 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
799 | arg[0] = PCSET; | |
0df8b418 | 800 | else /* Reset the flag. */ |
44122162 RO |
801 | arg[0] = PCUNSET; |
802 | ||
803 | arg[1] = flag; | |
804 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 805 | |
77382aee PA |
806 | /* The above operation renders the procinfo's cached pstatus |
807 | obsolete. */ | |
c3f6f71d | 808 | pi->status_valid = 0; |
c906108c | 809 | |
c3f6f71d | 810 | if (!win) |
8a3fe4f8 | 811 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
812 | flag == PR_FORK ? "PR_FORK" : |
813 | flag == PR_RLC ? "PR_RLC" : | |
c3f6f71d | 814 | flag == PR_ASYNC ? "PR_ASYNC" : |
0d06e24b | 815 | flag == PR_KLC ? "PR_KLC" : |
c3f6f71d JM |
816 | "<unknown flag>", |
817 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 818 | |
c3f6f71d JM |
819 | return win; |
820 | } | |
c906108c | 821 | |
77382aee PA |
822 | /* Set the run_on_last_close flag. Process with all threads will |
823 | become runnable when debugger closes all /proc fds. Returns | |
824 | non-zero for success, zero for failure. */ | |
c906108c | 825 | |
d3581e61 | 826 | static int |
fba45db2 | 827 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 828 | { |
c3f6f71d JM |
829 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
830 | } | |
c906108c | 831 | |
77382aee PA |
832 | /* Reset the run_on_last_close flag. The process will NOT become |
833 | runnable when debugger closes its file handles. Returns non-zero | |
834 | for success, zero for failure. */ | |
c906108c | 835 | |
d3581e61 | 836 | static int |
fba45db2 | 837 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
838 | { |
839 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
840 | } |
841 | ||
77382aee | 842 | /* Reset inherit_on_fork flag. If the process forks a child while we |
85102364 | 843 | are registered for events in the parent, then we will NOT receive |
77382aee PA |
844 | events from the child. Returns non-zero for success, zero for |
845 | failure. */ | |
c906108c | 846 | |
d3581e61 | 847 | static int |
fba45db2 | 848 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
849 | { |
850 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
851 | } | |
c906108c | 852 | |
77382aee PA |
853 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
854 | (signal etc.), the remaining LWPs will continue to run. Returns | |
855 | non-zero for success, zero for failure. */ | |
c906108c | 856 | |
d3581e61 | 857 | static int |
fba45db2 | 858 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
859 | { |
860 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
861 | } | |
c906108c | 862 | |
77382aee PA |
863 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
864 | (signal etc.), then all other LWPs will stop as well. Returns | |
865 | non-zero for success, zero for failure. */ | |
c906108c | 866 | |
d3581e61 | 867 | static int |
fba45db2 | 868 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
869 | { |
870 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
871 | } | |
c906108c | 872 | |
77382aee PA |
873 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
874 | for success, zero for failure. */ | |
c906108c | 875 | |
d3581e61 | 876 | static int |
fba45db2 | 877 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
878 | { |
879 | int win; | |
c906108c | 880 | |
77382aee PA |
881 | /* We might conceivably apply this operation to an LWP, and the |
882 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 883 | |
c475f569 | 884 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c3f6f71d JM |
885 | return 0; |
886 | else | |
887 | { | |
37de36c6 | 888 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 889 | |
c3f6f71d | 890 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d | 891 | } |
c906108c | 892 | |
c3f6f71d JM |
893 | return win; |
894 | } | |
c5aa993b | 895 | |
77382aee PA |
896 | /* Wait for the process or LWP to stop (block until it does). Returns |
897 | non-zero for success, zero for failure. */ | |
c906108c | 898 | |
d3581e61 | 899 | static int |
fba45db2 | 900 | proc_wait_for_stop (procinfo *pi) |
c906108c | 901 | { |
c3f6f71d JM |
902 | int win; |
903 | ||
77382aee PA |
904 | /* We should never have to apply this operation to any procinfo |
905 | except the one for the main process. If that ever changes for | |
906 | any reason, then take out the following clause and replace it | |
907 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 908 | |
c3f6f71d JM |
909 | if (pi->tid != 0) |
910 | pi = find_procinfo_or_die (pi->pid, 0); | |
911 | ||
44122162 | 912 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 913 | |
92137da0 RO |
914 | set_sigint_trap (); |
915 | ||
44122162 | 916 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
92137da0 RO |
917 | |
918 | clear_sigint_trap (); | |
919 | ||
44122162 RO |
920 | /* We been runnin' and we stopped -- need to update status. */ |
921 | pi->status_valid = 0; | |
c906108c | 922 | |
c3f6f71d | 923 | return win; |
c906108c SS |
924 | } |
925 | ||
77382aee PA |
926 | /* Make the process or LWP runnable. |
927 | ||
928 | Options (not all are implemented): | |
929 | - single-step | |
930 | - clear current fault | |
931 | - clear current signal | |
932 | - abort the current system call | |
933 | - stop as soon as finished with system call | |
934 | - (ioctl): set traced signal set | |
935 | - (ioctl): set held signal set | |
936 | - (ioctl): set traced fault set | |
937 | - (ioctl): set start pc (vaddr) | |
938 | ||
939 | Always clears the current fault. PI is the process or LWP to | |
940 | operate on. If STEP is true, set the process or LWP to trap after | |
941 | one instruction. If SIGNO is zero, clear the current signal if | |
942 | any; if non-zero, set the current signal to this one. Returns | |
943 | non-zero for success, zero for failure. */ | |
c3f6f71d | 944 | |
d3581e61 | 945 | static int |
fba45db2 | 946 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
947 | { |
948 | int win; | |
949 | int runflags; | |
950 | ||
77382aee PA |
951 | /* We will probably have to apply this operation to individual |
952 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 953 | |
c475f569 RO |
954 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
955 | return 0; | |
c906108c | 956 | |
0df8b418 | 957 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
958 | if (step) |
959 | runflags |= PRSTEP; | |
960 | if (signo == 0) | |
961 | runflags |= PRCSIG; | |
0df8b418 | 962 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 963 | proc_set_current_signal (pi, signo); |
c5aa993b | 964 | |
44122162 | 965 | procfs_ctl_t cmd[2]; |
c906108c | 966 | |
44122162 RO |
967 | cmd[0] = PCRUN; |
968 | cmd[1] = runflags; | |
969 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c906108c | 970 | |
c3f6f71d JM |
971 | return win; |
972 | } | |
c906108c | 973 | |
77382aee PA |
974 | /* Register to trace signals in the process or LWP. Returns non-zero |
975 | for success, zero for failure. */ | |
c906108c | 976 | |
d3581e61 | 977 | static int |
44122162 | 978 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 979 | { |
c3f6f71d JM |
980 | int win; |
981 | ||
77382aee PA |
982 | /* We should never have to apply this operation to any procinfo |
983 | except the one for the main process. If that ever changes for | |
984 | any reason, then take out the following clause and replace it | |
985 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 986 | |
c3f6f71d JM |
987 | if (pi->tid != 0) |
988 | pi = find_procinfo_or_die (pi->pid, 0); | |
989 | ||
44122162 RO |
990 | struct { |
991 | procfs_ctl_t cmd; | |
992 | /* Use char array to avoid alignment issues. */ | |
993 | char sigset[sizeof (sigset_t)]; | |
994 | } arg; | |
c906108c | 995 | |
44122162 RO |
996 | arg.cmd = PCSTRACE; |
997 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
998 | ||
999 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1000 | |
0df8b418 | 1001 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1002 | pi->status_valid = 0; |
c906108c | 1003 | |
c3f6f71d | 1004 | if (!win) |
8a3fe4f8 | 1005 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1006 | return win; |
c906108c SS |
1007 | } |
1008 | ||
77382aee PA |
1009 | /* Register to trace hardware faults in the process or LWP. Returns |
1010 | non-zero for success, zero for failure. */ | |
c906108c | 1011 | |
d3581e61 | 1012 | static int |
fba45db2 | 1013 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1014 | { |
1015 | int win; | |
1016 | ||
77382aee PA |
1017 | /* We should never have to apply this operation to any procinfo |
1018 | except the one for the main process. If that ever changes for | |
1019 | any reason, then take out the following clause and replace it | |
1020 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1021 | |
c3f6f71d JM |
1022 | if (pi->tid != 0) |
1023 | pi = find_procinfo_or_die (pi->pid, 0); | |
1024 | ||
44122162 RO |
1025 | struct { |
1026 | procfs_ctl_t cmd; | |
1027 | /* Use char array to avoid alignment issues. */ | |
1028 | char fltset[sizeof (fltset_t)]; | |
1029 | } arg; | |
1030 | ||
1031 | arg.cmd = PCSFAULT; | |
1032 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1033 | |
44122162 | 1034 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
c906108c | 1035 | |
0df8b418 | 1036 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1037 | pi->status_valid = 0; |
c906108c | 1038 | |
c3f6f71d JM |
1039 | return win; |
1040 | } | |
c5aa993b | 1041 | |
77382aee PA |
1042 | /* Register to trace entry to system calls in the process or LWP. |
1043 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1044 | |
d3581e61 | 1045 | static int |
fba45db2 | 1046 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1047 | { |
c3f6f71d JM |
1048 | int win; |
1049 | ||
77382aee PA |
1050 | /* We should never have to apply this operation to any procinfo |
1051 | except the one for the main process. If that ever changes for | |
1052 | any reason, then take out the following clause and replace it | |
1053 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1054 | |
c3f6f71d JM |
1055 | if (pi->tid != 0) |
1056 | pi = find_procinfo_or_die (pi->pid, 0); | |
1057 | ||
c475f569 | 1058 | struct { |
44122162 RO |
1059 | procfs_ctl_t cmd; |
1060 | /* Use char array to avoid alignment issues. */ | |
1061 | char sysset[sizeof (sysset_t)]; | |
c475f569 | 1062 | } arg; |
c3f6f71d | 1063 | |
c475f569 RO |
1064 | arg.cmd = PCSENTRY; |
1065 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
44122162 | 1066 | |
c475f569 | 1067 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
37de36c6 | 1068 | |
77382aee PA |
1069 | /* The above operation renders the procinfo's cached pstatus |
1070 | obsolete. */ | |
c3f6f71d | 1071 | pi->status_valid = 0; |
19958708 | 1072 | |
c3f6f71d | 1073 | return win; |
c906108c SS |
1074 | } |
1075 | ||
77382aee PA |
1076 | /* Register to trace exit from system calls in the process or LWP. |
1077 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1078 | |
d3581e61 | 1079 | static int |
fba45db2 | 1080 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1081 | { |
1082 | int win; | |
1083 | ||
77382aee PA |
1084 | /* We should never have to apply this operation to any procinfo |
1085 | except the one for the main process. If that ever changes for | |
1086 | any reason, then take out the following clause and replace it | |
1087 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1088 | |
c3f6f71d JM |
1089 | if (pi->tid != 0) |
1090 | pi = find_procinfo_or_die (pi->pid, 0); | |
1091 | ||
44122162 RO |
1092 | struct gdb_proc_ctl_pcsexit { |
1093 | procfs_ctl_t cmd; | |
1094 | /* Use char array to avoid alignment issues. */ | |
1095 | char sysset[sizeof (sysset_t)]; | |
c475f569 | 1096 | } arg; |
c906108c | 1097 | |
c475f569 RO |
1098 | arg.cmd = PCSEXIT; |
1099 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1100 | |
c475f569 | 1101 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
37de36c6 | 1102 | |
77382aee PA |
1103 | /* The above operation renders the procinfo's cached pstatus |
1104 | obsolete. */ | |
c3f6f71d | 1105 | pi->status_valid = 0; |
c906108c | 1106 | |
c3f6f71d JM |
1107 | return win; |
1108 | } | |
c906108c | 1109 | |
77382aee PA |
1110 | /* Specify the set of blocked / held signals in the process or LWP. |
1111 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1112 | |
d3581e61 | 1113 | static int |
44122162 | 1114 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1115 | { |
c3f6f71d JM |
1116 | int win; |
1117 | ||
77382aee PA |
1118 | /* We should never have to apply this operation to any procinfo |
1119 | except the one for the main process. If that ever changes for | |
1120 | any reason, then take out the following clause and replace it | |
1121 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1122 | |
c3f6f71d JM |
1123 | if (pi->tid != 0) |
1124 | pi = find_procinfo_or_die (pi->pid, 0); | |
1125 | ||
44122162 RO |
1126 | struct { |
1127 | procfs_ctl_t cmd; | |
1128 | /* Use char array to avoid alignment issues. */ | |
1129 | char hold[sizeof (sigset_t)]; | |
1130 | } arg; | |
1131 | ||
1132 | arg.cmd = PCSHOLD; | |
1133 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1134 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1135 | ||
77382aee PA |
1136 | /* The above operation renders the procinfo's cached pstatus |
1137 | obsolete. */ | |
c3f6f71d JM |
1138 | pi->status_valid = 0; |
1139 | ||
1140 | return win; | |
c906108c SS |
1141 | } |
1142 | ||
77382aee PA |
1143 | /* Returns the set of signals that are held / blocked. Will also copy |
1144 | the sigset if SAVE is non-zero. */ | |
c906108c | 1145 | |
44122162 RO |
1146 | static sigset_t * |
1147 | proc_get_held_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1148 | { |
44122162 | 1149 | sigset_t *ret = NULL; |
c3f6f71d | 1150 | |
77382aee PA |
1151 | /* We should never have to apply this operation to any procinfo |
1152 | except the one for the main process. If that ever changes for | |
1153 | any reason, then take out the following clause and replace it | |
1154 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1155 | |
c3f6f71d JM |
1156 | if (pi->tid != 0) |
1157 | pi = find_procinfo_or_die (pi->pid, 0); | |
1158 | ||
c3f6f71d JM |
1159 | if (!pi->status_valid) |
1160 | if (!proc_get_status (pi)) | |
1161 | return NULL; | |
1162 | ||
c3f6f71d | 1163 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d | 1164 | if (save && ret) |
44122162 | 1165 | memcpy (save, ret, sizeof (sigset_t)); |
c3f6f71d JM |
1166 | |
1167 | return ret; | |
c906108c SS |
1168 | } |
1169 | ||
77382aee PA |
1170 | /* Returns the set of signals that are traced / debugged. Will also |
1171 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1172 | |
44122162 RO |
1173 | static sigset_t * |
1174 | proc_get_traced_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1175 | { |
44122162 | 1176 | sigset_t *ret = NULL; |
c3f6f71d | 1177 | |
77382aee PA |
1178 | /* We should never have to apply this operation to any procinfo |
1179 | except the one for the main process. If that ever changes for | |
1180 | any reason, then take out the following clause and replace it | |
1181 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1182 | |
c3f6f71d JM |
1183 | if (pi->tid != 0) |
1184 | pi = find_procinfo_or_die (pi->pid, 0); | |
1185 | ||
c3f6f71d JM |
1186 | if (!pi->status_valid) |
1187 | if (!proc_get_status (pi)) | |
1188 | return NULL; | |
1189 | ||
1190 | ret = &pi->prstatus.pr_sigtrace; | |
c3f6f71d | 1191 | if (save && ret) |
44122162 | 1192 | memcpy (save, ret, sizeof (sigset_t)); |
c906108c | 1193 | |
c3f6f71d JM |
1194 | return ret; |
1195 | } | |
c906108c | 1196 | |
77382aee PA |
1197 | /* Returns the set of hardware faults that are traced /debugged. Will |
1198 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1199 | |
d3581e61 | 1200 | static fltset_t * |
fba45db2 | 1201 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1202 | { |
1203 | fltset_t *ret = NULL; | |
1204 | ||
77382aee PA |
1205 | /* We should never have to apply this operation to any procinfo |
1206 | except the one for the main process. If that ever changes for | |
1207 | any reason, then take out the following clause and replace it | |
1208 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1209 | |
c3f6f71d JM |
1210 | if (pi->tid != 0) |
1211 | pi = find_procinfo_or_die (pi->pid, 0); | |
1212 | ||
c3f6f71d JM |
1213 | if (!pi->status_valid) |
1214 | if (!proc_get_status (pi)) | |
1215 | return NULL; | |
1216 | ||
1217 | ret = &pi->prstatus.pr_flttrace; | |
c3f6f71d JM |
1218 | if (save && ret) |
1219 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1220 | |
c3f6f71d JM |
1221 | return ret; |
1222 | } | |
c906108c | 1223 | |
77382aee PA |
1224 | /* Returns the set of syscalls that are traced /debugged on entry. |
1225 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1226 | |
d3581e61 | 1227 | static sysset_t * |
fba45db2 | 1228 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1229 | { |
1230 | sysset_t *ret = NULL; | |
1231 | ||
77382aee PA |
1232 | /* We should never have to apply this operation to any procinfo |
1233 | except the one for the main process. If that ever changes for | |
1234 | any reason, then take out the following clause and replace it | |
1235 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1236 | |
c3f6f71d JM |
1237 | if (pi->tid != 0) |
1238 | pi = find_procinfo_or_die (pi->pid, 0); | |
1239 | ||
c3f6f71d JM |
1240 | if (!pi->status_valid) |
1241 | if (!proc_get_status (pi)) | |
1242 | return NULL; | |
1243 | ||
1244 | ret = &pi->prstatus.pr_sysentry; | |
c3f6f71d | 1245 | if (save && ret) |
44122162 | 1246 | memcpy (save, ret, sizeof (sysset_t)); |
c906108c | 1247 | |
c3f6f71d JM |
1248 | return ret; |
1249 | } | |
c5aa993b | 1250 | |
77382aee PA |
1251 | /* Returns the set of syscalls that are traced /debugged on exit. |
1252 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1253 | |
d3581e61 | 1254 | static sysset_t * |
fba45db2 | 1255 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1256 | { |
44122162 | 1257 | sysset_t *ret = NULL; |
c3f6f71d | 1258 | |
77382aee PA |
1259 | /* We should never have to apply this operation to any procinfo |
1260 | except the one for the main process. If that ever changes for | |
1261 | any reason, then take out the following clause and replace it | |
1262 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1263 | |
c3f6f71d JM |
1264 | if (pi->tid != 0) |
1265 | pi = find_procinfo_or_die (pi->pid, 0); | |
1266 | ||
c3f6f71d JM |
1267 | if (!pi->status_valid) |
1268 | if (!proc_get_status (pi)) | |
1269 | return NULL; | |
1270 | ||
1271 | ret = &pi->prstatus.pr_sysexit; | |
c3f6f71d | 1272 | if (save && ret) |
44122162 | 1273 | memcpy (save, ret, sizeof (sysset_t)); |
c3f6f71d JM |
1274 | |
1275 | return ret; | |
1276 | } | |
c906108c | 1277 | |
77382aee PA |
1278 | /* The current fault (if any) is cleared; the associated signal will |
1279 | not be sent to the process or LWP when it resumes. Returns | |
1280 | non-zero for success, zero for failure. */ | |
c906108c | 1281 | |
d3581e61 | 1282 | static int |
fba45db2 | 1283 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
1284 | { |
1285 | int win; | |
1286 | ||
77382aee PA |
1287 | /* We should never have to apply this operation to any procinfo |
1288 | except the one for the main process. If that ever changes for | |
1289 | any reason, then take out the following clause and replace it | |
1290 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1291 | |
c3f6f71d JM |
1292 | if (pi->tid != 0) |
1293 | pi = find_procinfo_or_die (pi->pid, 0); | |
1294 | ||
44122162 | 1295 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 1296 | |
44122162 | 1297 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d JM |
1298 | |
1299 | return win; | |
c906108c SS |
1300 | } |
1301 | ||
77382aee PA |
1302 | /* Set the "current signal" that will be delivered next to the |
1303 | process. NOTE: semantics are different from those of KILL. This | |
1304 | signal will be delivered to the process or LWP immediately when it | |
1305 | is resumed (even if the signal is held/blocked); it will NOT | |
1306 | immediately cause another event of interest, and will NOT first | |
1307 | trap back to the debugger. Returns non-zero for success, zero for | |
1308 | failure. */ | |
c3f6f71d | 1309 | |
d3581e61 | 1310 | static int |
fba45db2 | 1311 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1312 | { |
1313 | int win; | |
1314 | struct { | |
37de36c6 | 1315 | procfs_ctl_t cmd; |
c3f6f71d | 1316 | /* Use char array to avoid alignment issues. */ |
44122162 | 1317 | char sinfo[sizeof (siginfo_t)]; |
c3f6f71d | 1318 | } arg; |
44122162 | 1319 | siginfo_t mysinfo; |
5b6d1e4f | 1320 | process_stratum_target *wait_target; |
c162e8c9 JM |
1321 | ptid_t wait_ptid; |
1322 | struct target_waitstatus wait_status; | |
c3f6f71d | 1323 | |
77382aee PA |
1324 | /* We should never have to apply this operation to any procinfo |
1325 | except the one for the main process. If that ever changes for | |
1326 | any reason, then take out the following clause and replace it | |
1327 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1328 | |
c3f6f71d JM |
1329 | if (pi->tid != 0) |
1330 | pi = find_procinfo_or_die (pi->pid, 0); | |
1331 | ||
c3f6f71d | 1332 | /* The pointer is just a type alias. */ |
5b6d1e4f PA |
1333 | get_last_target_status (&wait_target, &wait_ptid, &wait_status); |
1334 | if (wait_target == &the_procfs_target | |
1335 | && wait_ptid == inferior_ptid | |
c162e8c9 | 1336 | && wait_status.kind == TARGET_WAITKIND_STOPPED |
2ea28649 | 1337 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 | 1338 | && proc_get_status (pi) |
c162e8c9 | 1339 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
c162e8c9 JM |
1340 | ) |
1341 | /* Use the siginfo associated with the signal being | |
1342 | redelivered. */ | |
44122162 | 1343 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (siginfo_t)); |
c162e8c9 JM |
1344 | else |
1345 | { | |
73930d4d KH |
1346 | mysinfo.si_signo = signo; |
1347 | mysinfo.si_code = 0; | |
1348 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1349 | mysinfo.si_uid = getuid (); /* ?why? */ | |
44122162 | 1350 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); |
c162e8c9 | 1351 | } |
c3f6f71d | 1352 | |
c3f6f71d JM |
1353 | arg.cmd = PCSSIG; |
1354 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1355 | |
c3f6f71d JM |
1356 | return win; |
1357 | } | |
c906108c | 1358 | |
77382aee PA |
1359 | /* The current signal (if any) is cleared, and is not sent to the |
1360 | process or LWP when it resumes. Returns non-zero for success, zero | |
1361 | for failure. */ | |
c906108c | 1362 | |
d3581e61 | 1363 | static int |
fba45db2 | 1364 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
1365 | { |
1366 | int win; | |
1367 | ||
77382aee PA |
1368 | /* We should never have to apply this operation to any procinfo |
1369 | except the one for the main process. If that ever changes for | |
1370 | any reason, then take out the following clause and replace it | |
1371 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1372 | |
c3f6f71d JM |
1373 | if (pi->tid != 0) |
1374 | pi = find_procinfo_or_die (pi->pid, 0); | |
1375 | ||
44122162 RO |
1376 | struct { |
1377 | procfs_ctl_t cmd; | |
1378 | /* Use char array to avoid alignment issues. */ | |
1379 | char sinfo[sizeof (siginfo_t)]; | |
1380 | } arg; | |
1381 | siginfo_t mysinfo; | |
1382 | ||
1383 | arg.cmd = PCSSIG; | |
1384 | /* The pointer is just a type alias. */ | |
1385 | mysinfo.si_signo = 0; | |
1386 | mysinfo.si_code = 0; | |
1387 | mysinfo.si_errno = 0; | |
1388 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1389 | mysinfo.si_uid = getuid (); /* ?why? */ | |
1390 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); | |
1391 | ||
1392 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1393 | |
c3f6f71d JM |
1394 | return win; |
1395 | } | |
c906108c | 1396 | |
772cf8be MK |
1397 | /* Return the general-purpose registers for the process or LWP |
1398 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1399 | |
d3581e61 | 1400 | static gdb_gregset_t * |
fba45db2 | 1401 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
1402 | { |
1403 | if (!pi->status_valid || !pi->gregs_valid) | |
1404 | if (!proc_get_status (pi)) | |
1405 | return NULL; | |
1406 | ||
c3f6f71d | 1407 | return &pi->prstatus.pr_lwp.pr_reg; |
c3f6f71d | 1408 | } |
c5aa993b | 1409 | |
772cf8be MK |
1410 | /* Return the general-purpose registers for the process or LWP |
1411 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1412 | |
d3581e61 | 1413 | static gdb_fpregset_t * |
fba45db2 | 1414 | proc_get_fpregs (procinfo *pi) |
c906108c | 1415 | { |
c3f6f71d JM |
1416 | if (!pi->status_valid || !pi->fpregs_valid) |
1417 | if (!proc_get_status (pi)) | |
1418 | return NULL; | |
1419 | ||
c3f6f71d | 1420 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c906108c SS |
1421 | } |
1422 | ||
772cf8be MK |
1423 | /* Write the general-purpose registers back to the process or LWP |
1424 | corresponding to PI. Return non-zero for success, zero for | |
1425 | failure. */ | |
c3f6f71d | 1426 | |
d3581e61 | 1427 | static int |
fba45db2 | 1428 | proc_set_gregs (procinfo *pi) |
c906108c | 1429 | { |
c3f6f71d JM |
1430 | gdb_gregset_t *gregs; |
1431 | int win; | |
c5aa993b | 1432 | |
772cf8be MK |
1433 | gregs = proc_get_gregs (pi); |
1434 | if (gregs == NULL) | |
1435 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 1436 | |
772cf8be | 1437 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c475f569 | 1438 | return 0; |
c3f6f71d | 1439 | else |
c906108c | 1440 | { |
c3f6f71d | 1441 | struct { |
37de36c6 | 1442 | procfs_ctl_t cmd; |
c3f6f71d JM |
1443 | /* Use char array to avoid alignment issues. */ |
1444 | char gregs[sizeof (gdb_gregset_t)]; | |
1445 | } arg; | |
1446 | ||
772cf8be | 1447 | arg.cmd = PCSREG; |
c3f6f71d JM |
1448 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
1449 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1450 | } |
c3f6f71d | 1451 | |
772cf8be | 1452 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1453 | pi->gregs_valid = 0; |
1454 | return win; | |
c906108c SS |
1455 | } |
1456 | ||
772cf8be MK |
1457 | /* Write the floating-pointer registers back to the process or LWP |
1458 | corresponding to PI. Return non-zero for success, zero for | |
1459 | failure. */ | |
c3f6f71d | 1460 | |
d3581e61 | 1461 | static int |
fba45db2 | 1462 | proc_set_fpregs (procinfo *pi) |
c906108c | 1463 | { |
c3f6f71d JM |
1464 | gdb_fpregset_t *fpregs; |
1465 | int win; | |
1466 | ||
772cf8be MK |
1467 | fpregs = proc_get_fpregs (pi); |
1468 | if (fpregs == NULL) | |
1469 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 1470 | |
772cf8be | 1471 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c475f569 | 1472 | return 0; |
c3f6f71d | 1473 | else |
c906108c | 1474 | { |
c3f6f71d | 1475 | struct { |
37de36c6 | 1476 | procfs_ctl_t cmd; |
c3f6f71d JM |
1477 | /* Use char array to avoid alignment issues. */ |
1478 | char fpregs[sizeof (gdb_fpregset_t)]; | |
1479 | } arg; | |
1480 | ||
772cf8be | 1481 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
1482 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
1483 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1484 | } |
c3f6f71d | 1485 | |
772cf8be | 1486 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1487 | pi->fpregs_valid = 0; |
1488 | return win; | |
c906108c SS |
1489 | } |
1490 | ||
77382aee PA |
1491 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
1492 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1493 | |
d3581e61 | 1494 | static int |
fba45db2 | 1495 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
1496 | { |
1497 | int win; | |
c906108c | 1498 | |
77382aee PA |
1499 | /* We might conceivably apply this operation to an LWP, and the |
1500 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1501 | |
c475f569 RO |
1502 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
1503 | return 0; | |
c3f6f71d JM |
1504 | else |
1505 | { | |
37de36c6 | 1506 | procfs_ctl_t cmd[2]; |
c906108c | 1507 | |
c3f6f71d JM |
1508 | cmd[0] = PCKILL; |
1509 | cmd[1] = signo; | |
1510 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c3f6f71d | 1511 | } |
c906108c | 1512 | |
c3f6f71d JM |
1513 | return win; |
1514 | } | |
c906108c | 1515 | |
77382aee PA |
1516 | /* Find the pid of the process that started this one. Returns the |
1517 | parent process pid, or zero. */ | |
c906108c | 1518 | |
d3581e61 | 1519 | static int |
fba45db2 | 1520 | proc_parent_pid (procinfo *pi) |
c906108c | 1521 | { |
77382aee PA |
1522 | /* We should never have to apply this operation to any procinfo |
1523 | except the one for the main process. If that ever changes for | |
1524 | any reason, then take out the following clause and replace it | |
1525 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1526 | |
c3f6f71d JM |
1527 | if (pi->tid != 0) |
1528 | pi = find_procinfo_or_die (pi->pid, 0); | |
1529 | ||
1530 | if (!pi->status_valid) | |
1531 | if (!proc_get_status (pi)) | |
1532 | return 0; | |
c5aa993b | 1533 | |
c3f6f71d JM |
1534 | return pi->prstatus.pr_ppid; |
1535 | } | |
1536 | ||
9a043c1d AC |
1537 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
1538 | (a.k.a void pointer)! */ | |
1539 | ||
1540 | static void * | |
1541 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
1542 | { | |
f5656ead | 1543 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
1544 | void *ptr; |
1545 | ||
4e906f53 | 1546 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 1547 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 1548 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
1549 | return ptr; |
1550 | } | |
1551 | ||
a0911fd0 | 1552 | static int |
fba45db2 | 1553 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 1554 | { |
c3f6f71d | 1555 | struct { |
37de36c6 | 1556 | procfs_ctl_t cmd; |
c3f6f71d JM |
1557 | char watch[sizeof (prwatch_t)]; |
1558 | } arg; | |
73930d4d | 1559 | prwatch_t pwatch; |
c3f6f71d | 1560 | |
9a043c1d AC |
1561 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
1562 | convert a target address into something that can be stored in a | |
1563 | native data structure. */ | |
73930d4d | 1564 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
73930d4d KH |
1565 | pwatch.pr_size = len; |
1566 | pwatch.pr_wflags = wflags; | |
c3f6f71d | 1567 | arg.cmd = PCWATCH; |
73930d4d | 1568 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d | 1569 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
c906108c SS |
1570 | } |
1571 | ||
c3f6f71d | 1572 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 1573 | |
c3f6f71d | 1574 | /* =================== Thread "MODULE" =================== */ |
c906108c | 1575 | |
44122162 RO |
1576 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
1577 | since there is a different way to do threads on every OS. */ | |
c906108c | 1578 | |
44122162 | 1579 | /* Returns the number of threads for the process. */ |
c906108c | 1580 | |
d3581e61 | 1581 | static int |
fba45db2 | 1582 | proc_get_nthreads (procinfo *pi) |
c906108c | 1583 | { |
c3f6f71d JM |
1584 | if (!pi->status_valid) |
1585 | if (!proc_get_status (pi)) | |
1586 | return 0; | |
c5aa993b | 1587 | |
44122162 RO |
1588 | /* Only works for the process procinfo, because the LWP procinfos do not |
1589 | get prstatus filled in. */ | |
0df8b418 | 1590 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 1591 | pi = find_procinfo_or_die (pi->pid, 0); |
c3f6f71d | 1592 | return pi->prstatus.pr_nlwp; |
c906108c SS |
1593 | } |
1594 | ||
77382aee PA |
1595 | /* LWP version. |
1596 | ||
1597 | Return the ID of the thread that had an event of interest. | |
1598 | (ie. the one that hit a breakpoint or other traced event). All | |
1599 | other things being equal, this should be the ID of a thread that is | |
1600 | currently executing. */ | |
c3f6f71d | 1601 | |
d3581e61 | 1602 | static int |
fba45db2 | 1603 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 1604 | { |
77382aee PA |
1605 | /* Note: this should be applied to the root procinfo for the |
1606 | process, not to the procinfo for an LWP. If applied to the | |
1607 | procinfo for an LWP, it will simply return that LWP's ID. In | |
1608 | that case, find the parent process procinfo. */ | |
19958708 | 1609 | |
c3f6f71d JM |
1610 | if (pi->tid != 0) |
1611 | pi = find_procinfo_or_die (pi->pid, 0); | |
1612 | ||
1613 | if (!pi->status_valid) | |
1614 | if (!proc_get_status (pi)) | |
1615 | return 0; | |
1616 | ||
c3f6f71d | 1617 | return pi->prstatus.pr_lwp.pr_lwpid; |
c3f6f71d JM |
1618 | } |
1619 | ||
77382aee PA |
1620 | /* Discover the IDs of all the threads within the process, and create |
1621 | a procinfo for each of them (chained to the parent). This | |
1622 | unfortunately requires a different method on every OS. Returns | |
1623 | non-zero for success, zero for failure. */ | |
c906108c | 1624 | |
a0911fd0 | 1625 | static int |
fba45db2 | 1626 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
1627 | { |
1628 | if (thread && parent) /* sanity */ | |
c906108c | 1629 | { |
c3f6f71d JM |
1630 | thread->status_valid = 0; |
1631 | if (!proc_get_status (thread)) | |
1632 | destroy_one_procinfo (&parent->thread_list, thread); | |
1633 | } | |
1634 | return 0; /* keep iterating */ | |
1635 | } | |
c5aa993b | 1636 | |
d3581e61 | 1637 | static int |
fba45db2 | 1638 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
1639 | { |
1640 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
1641 | struct dirent *direntry; | |
c3f6f71d | 1642 | procinfo *thread; |
f0b3976b | 1643 | gdb_dir_up dirp; |
c3f6f71d JM |
1644 | int lwpid; |
1645 | ||
77382aee PA |
1646 | /* We should never have to apply this operation to any procinfo |
1647 | except the one for the main process. If that ever changes for | |
1648 | any reason, then take out the following clause and replace it | |
1649 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1650 | |
c3f6f71d JM |
1651 | if (pi->tid != 0) |
1652 | pi = find_procinfo_or_die (pi->pid, 0); | |
1653 | ||
1654 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
1655 | ||
05b4bd79 PA |
1656 | /* Note: this brute-force method was originally devised for Unixware |
1657 | (support removed since), and will also work on Solaris 2.6 and | |
1658 | 2.7. The original comment mentioned the existence of a much | |
1659 | simpler and more elegant way to do this on Solaris, but didn't | |
1660 | point out what that was. */ | |
c3f6f71d JM |
1661 | |
1662 | strcpy (pathname, pi->pathname); | |
1663 | strcat (pathname, "/lwp"); | |
f0b3976b TT |
1664 | dirp.reset (opendir (pathname)); |
1665 | if (dirp == NULL) | |
c3f6f71d JM |
1666 | proc_error (pi, "update_threads, opendir", __LINE__); |
1667 | ||
f0b3976b | 1668 | while ((direntry = readdir (dirp.get ())) != NULL) |
c3f6f71d JM |
1669 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ |
1670 | { | |
1671 | lwpid = atoi (&direntry->d_name[0]); | |
c475f569 RO |
1672 | thread = create_procinfo (pi->pid, lwpid); |
1673 | if (thread == NULL) | |
c3f6f71d JM |
1674 | proc_error (pi, "update_threads, create_procinfo", __LINE__); |
1675 | } | |
1676 | pi->threads_valid = 1; | |
c3f6f71d JM |
1677 | return 1; |
1678 | } | |
c906108c | 1679 | |
77382aee PA |
1680 | /* Given a pointer to a function, call that function once for each lwp |
1681 | in the procinfo list, until the function returns non-zero, in which | |
1682 | event return the value returned by the function. | |
1683 | ||
1684 | Note: this function does NOT call update_threads. If you want to | |
1685 | discover new threads first, you must call that function explicitly. | |
1686 | This function just makes a quick pass over the currently-known | |
1687 | procinfos. | |
1688 | ||
1689 | PI is the parent process procinfo. FUNC is the per-thread | |
1690 | function. PTR is an opaque parameter for function. Returns the | |
1691 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 1692 | |
d3581e61 | 1693 | static int |
d0849a9a KB |
1694 | proc_iterate_over_threads (procinfo *pi, |
1695 | int (*func) (procinfo *, procinfo *, void *), | |
1696 | void *ptr) | |
c906108c | 1697 | { |
c3f6f71d JM |
1698 | procinfo *thread, *next; |
1699 | int retval = 0; | |
c906108c | 1700 | |
77382aee PA |
1701 | /* We should never have to apply this operation to any procinfo |
1702 | except the one for the main process. If that ever changes for | |
1703 | any reason, then take out the following clause and replace it | |
1704 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1705 | |
c3f6f71d JM |
1706 | if (pi->tid != 0) |
1707 | pi = find_procinfo_or_die (pi->pid, 0); | |
1708 | ||
1709 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 1710 | { |
0df8b418 | 1711 | next = thread->next; /* In case thread is destroyed. */ |
c475f569 RO |
1712 | retval = (*func) (pi, thread, ptr); |
1713 | if (retval != 0) | |
c3f6f71d | 1714 | break; |
c906108c | 1715 | } |
c3f6f71d JM |
1716 | |
1717 | return retval; | |
c906108c SS |
1718 | } |
1719 | ||
c3f6f71d JM |
1720 | /* =================== END, Thread "MODULE" =================== */ |
1721 | ||
1722 | /* =================== END, /proc "MODULE" =================== */ | |
1723 | ||
1724 | /* =================== GDB "MODULE" =================== */ | |
1725 | ||
77382aee PA |
1726 | /* Here are all of the gdb target vector functions and their |
1727 | friends. */ | |
c3f6f71d | 1728 | |
7fb43e53 | 1729 | static void do_attach (ptid_t ptid); |
6bd6f3b6 | 1730 | static void do_detach (); |
9185ddce | 1731 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 1732 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 1733 | |
77382aee PA |
1734 | /* Sets up the inferior to be debugged. Registers to trace signals, |
1735 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
1736 | may want to customize that. Returns zero for success (note! | |
1737 | unlike most functions in this module); on failure, returns the LINE | |
1738 | NUMBER where it failed! */ | |
c3f6f71d JM |
1739 | |
1740 | static int | |
fba45db2 | 1741 | procfs_debug_inferior (procinfo *pi) |
c906108c | 1742 | { |
c3f6f71d | 1743 | fltset_t traced_faults; |
44122162 | 1744 | sigset_t traced_signals; |
37de36c6 KB |
1745 | sysset_t *traced_syscall_entries; |
1746 | sysset_t *traced_syscall_exits; | |
1747 | int status; | |
c906108c | 1748 | |
0df8b418 MS |
1749 | /* Register to trace hardware faults in the child. */ |
1750 | prfillset (&traced_faults); /* trace all faults... */ | |
44122162 | 1751 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
1752 | if (!proc_set_traced_faults (pi, &traced_faults)) |
1753 | return __LINE__; | |
c906108c | 1754 | |
2455069d UW |
1755 | /* Initially, register to trace all signals in the child. */ |
1756 | prfillset (&traced_signals); | |
1757 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
1758 | return __LINE__; |
1759 | ||
37de36c6 | 1760 | |
c3f6f71d | 1761 | /* Register to trace the 'exit' system call (on entry). */ |
c475f569 | 1762 | traced_syscall_entries = XNEW (sysset_t); |
44122162 RO |
1763 | premptyset (traced_syscall_entries); |
1764 | praddset (traced_syscall_entries, SYS_exit); | |
1765 | praddset (traced_syscall_entries, SYS_lwp_exit); | |
c906108c | 1766 | |
37de36c6 KB |
1767 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
1768 | xfree (traced_syscall_entries); | |
1769 | if (!status) | |
c3f6f71d JM |
1770 | return __LINE__; |
1771 | ||
44122162 | 1772 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
1773 | /* GW: Rationale... |
1774 | Not all systems with /proc have all the exec* syscalls with the same | |
1775 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 1776 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 1777 | |
c475f569 | 1778 | traced_syscall_exits = XNEW (sysset_t); |
44122162 | 1779 | premptyset (traced_syscall_exits); |
c3f6f71d | 1780 | #ifdef SYS_exec |
44122162 | 1781 | praddset (traced_syscall_exits, SYS_exec); |
37de36c6 | 1782 | #endif |
44122162 RO |
1783 | praddset (traced_syscall_exits, SYS_execve); |
1784 | praddset (traced_syscall_exits, SYS_lwp_create); | |
1785 | praddset (traced_syscall_exits, SYS_lwp_exit); | |
c906108c | 1786 | |
37de36c6 KB |
1787 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
1788 | xfree (traced_syscall_exits); | |
1789 | if (!status) | |
c3f6f71d JM |
1790 | return __LINE__; |
1791 | ||
c3f6f71d | 1792 | return 0; |
c906108c SS |
1793 | } |
1794 | ||
f6ac5f3d PA |
1795 | void |
1796 | procfs_target::attach (const char *args, int from_tty) | |
c906108c | 1797 | { |
c3f6f71d JM |
1798 | int pid; |
1799 | ||
74164c56 | 1800 | pid = parse_pid_to_attach (args); |
c3f6f71d | 1801 | |
c3f6f71d | 1802 | if (pid == getpid ()) |
8a3fe4f8 | 1803 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 1804 | |
c3f6f71d | 1805 | if (from_tty) |
c906108c | 1806 | { |
d9fa87f4 | 1807 | const char *exec_file = get_exec_file (0); |
c3f6f71d JM |
1808 | |
1809 | if (exec_file) | |
a3f17187 | 1810 | printf_filtered (_("Attaching to program `%s', %s\n"), |
a068643d | 1811 | exec_file, target_pid_to_str (ptid_t (pid)).c_str ()); |
c3f6f71d | 1812 | else |
a3f17187 | 1813 | printf_filtered (_("Attaching to %s\n"), |
a068643d | 1814 | target_pid_to_str (ptid_t (pid)).c_str ()); |
c3f6f71d JM |
1815 | |
1816 | fflush (stdout); | |
c906108c | 1817 | } |
7fb43e53 | 1818 | do_attach (ptid_t (pid)); |
f6ac5f3d PA |
1819 | if (!target_is_pushed (this)) |
1820 | push_target (this); | |
c3f6f71d JM |
1821 | } |
1822 | ||
f6ac5f3d PA |
1823 | void |
1824 | procfs_target::detach (inferior *inf, int from_tty) | |
c3f6f71d | 1825 | { |
e99b03dc | 1826 | int pid = inferior_ptid.pid (); |
cc377e6b | 1827 | |
c3f6f71d | 1828 | if (from_tty) |
c906108c | 1829 | { |
995816ba | 1830 | const char *exec_file; |
cc377e6b | 1831 | |
c3f6f71d | 1832 | exec_file = get_exec_file (0); |
cc377e6b | 1833 | if (exec_file == NULL) |
c3f6f71d | 1834 | exec_file = ""; |
cc377e6b | 1835 | |
a3f17187 | 1836 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
a068643d | 1837 | target_pid_to_str (ptid_t (pid)).c_str ()); |
c906108c | 1838 | } |
19958708 | 1839 | |
6bd6f3b6 | 1840 | do_detach (); |
cc377e6b | 1841 | |
7fb43e53 | 1842 | switch_to_no_thread (); |
b7a08269 | 1843 | detach_inferior (inf); |
f6ac5f3d | 1844 | maybe_unpush_target (); |
c906108c SS |
1845 | } |
1846 | ||
7fb43e53 | 1847 | static void |
39f77062 | 1848 | do_attach (ptid_t ptid) |
c906108c | 1849 | { |
c3f6f71d | 1850 | procinfo *pi; |
181e7f93 | 1851 | struct inferior *inf; |
c3f6f71d | 1852 | int fail; |
2689673f | 1853 | int lwpid; |
c3f6f71d | 1854 | |
c475f569 RO |
1855 | pi = create_procinfo (ptid.pid (), 0); |
1856 | if (pi == NULL) | |
8a3fe4f8 | 1857 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
1858 | |
1859 | if (!open_procinfo_files (pi, FD_CTL)) | |
1860 | { | |
1861 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
c475f569 RO |
1862 | xsnprintf (errmsg, sizeof (errmsg), |
1863 | "do_attach: couldn't open /proc file for process %d", | |
1864 | ptid.pid ()); | |
c3f6f71d JM |
1865 | dead_procinfo (pi, errmsg, NOKILL); |
1866 | } | |
c906108c | 1867 | |
c3f6f71d JM |
1868 | /* Stop the process (if it isn't already stopped). */ |
1869 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 1870 | { |
c3f6f71d JM |
1871 | pi->was_stopped = 1; |
1872 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
1873 | } |
1874 | else | |
1875 | { | |
c3f6f71d JM |
1876 | pi->was_stopped = 0; |
1877 | /* Set the process to run again when we close it. */ | |
1878 | if (!proc_set_run_on_last_close (pi)) | |
1879 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
1880 | ||
0df8b418 | 1881 | /* Now stop the process. */ |
c3f6f71d JM |
1882 | if (!proc_stop_process (pi)) |
1883 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
1884 | pi->ignore_next_sigstop = 1; | |
c906108c | 1885 | } |
c3f6f71d JM |
1886 | /* Save some of the /proc state to be restored if we detach. */ |
1887 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
1888 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
1889 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
1890 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 1891 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
1892 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
1893 | NOKILL); | |
37de36c6 | 1894 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 1895 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
1896 | NOKILL); |
1897 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
1898 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
1899 | ||
c475f569 RO |
1900 | fail = procfs_debug_inferior (pi); |
1901 | if (fail != 0) | |
c3f6f71d JM |
1902 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); |
1903 | ||
6c95b8df PA |
1904 | inf = current_inferior (); |
1905 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 1906 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 1907 | inf->attach_flag = 1; |
2689673f PA |
1908 | |
1909 | /* Create a procinfo for the current lwp. */ | |
1910 | lwpid = proc_get_current_thread (pi); | |
1911 | create_procinfo (pi->pid, lwpid); | |
1912 | ||
1913 | /* Add it to gdb's thread list. */ | |
fd79271b | 1914 | ptid = ptid_t (pi->pid, lwpid, 0); |
7fb43e53 PA |
1915 | thread_info *thr = add_thread (&the_procfs_target, ptid); |
1916 | switch_to_thread (thr); | |
c906108c SS |
1917 | } |
1918 | ||
1919 | static void | |
6bd6f3b6 | 1920 | do_detach () |
c906108c | 1921 | { |
c3f6f71d | 1922 | procinfo *pi; |
c906108c | 1923 | |
0df8b418 | 1924 | /* Find procinfo for the main process. */ |
e99b03dc | 1925 | pi = find_procinfo_or_die (inferior_ptid.pid (), |
dfd4cc63 | 1926 | 0); /* FIXME: threads */ |
c5aa993b | 1927 | |
c3f6f71d JM |
1928 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
1929 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 1930 | |
c3f6f71d JM |
1931 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
1932 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
1933 | ||
37de36c6 | 1934 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
1935 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
1936 | ||
37de36c6 | 1937 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
1938 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
1939 | ||
1940 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
1941 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
1942 | ||
6bd6f3b6 SM |
1943 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
1944 | if (!(pi->was_stopped) | |
1945 | || query (_("Was stopped when attached, make it runnable again? "))) | |
c3f6f71d JM |
1946 | { |
1947 | /* Clear any pending signal. */ | |
1948 | if (!proc_clear_current_fault (pi)) | |
1949 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
1950 | ||
6bd6f3b6 | 1951 | if (!proc_clear_current_signal (pi)) |
1a303dec MS |
1952 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
1953 | ||
c3f6f71d JM |
1954 | if (!proc_set_run_on_last_close (pi)) |
1955 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
1956 | } | |
1957 | ||
c3f6f71d | 1958 | destroy_procinfo (pi); |
c906108c SS |
1959 | } |
1960 | ||
772cf8be MK |
1961 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
1962 | for all registers. | |
1963 | ||
1964 | ??? Is the following note still relevant? We can't get individual | |
1965 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
1966 | don't bother with caching at all in that case. | |
1967 | ||
1968 | NOTE: Since the /proc interface cannot give us individual | |
1969 | registers, we pay no attention to REGNUM, and just fetch them all. | |
1970 | This results in the possibility that we will do unnecessarily many | |
1971 | fetches, since we may be called repeatedly for individual | |
1972 | registers. So we cache the results, and mark the cache invalid | |
1973 | when the process is resumed. */ | |
c3f6f71d | 1974 | |
f6ac5f3d PA |
1975 | void |
1976 | procfs_target::fetch_registers (struct regcache *regcache, int regnum) | |
c906108c | 1977 | { |
772cf8be MK |
1978 | gdb_gregset_t *gregs; |
1979 | procinfo *pi; | |
222312d3 | 1980 | ptid_t ptid = regcache->ptid (); |
e99b03dc | 1981 | int pid = ptid.pid (); |
e38504b3 | 1982 | int tid = ptid.lwp (); |
ac7936df | 1983 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 1984 | |
2689673f | 1985 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
1986 | |
1987 | if (pi == NULL) | |
8a3fe4f8 | 1988 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
a068643d | 1989 | target_pid_to_str (ptid).c_str ()); |
c3f6f71d | 1990 | |
772cf8be MK |
1991 | gregs = proc_get_gregs (pi); |
1992 | if (gregs == NULL) | |
c3f6f71d JM |
1993 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
1994 | ||
56be3814 | 1995 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 1996 | |
40a6adc1 | 1997 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 1998 | { |
772cf8be MK |
1999 | gdb_fpregset_t *fpregs; |
2000 | ||
40a6adc1 MD |
2001 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2002 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2003 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2004 | return; /* Not a floating point register. */ |
c5aa993b | 2005 | |
772cf8be MK |
2006 | fpregs = proc_get_fpregs (pi); |
2007 | if (fpregs == NULL) | |
60054393 | 2008 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 2009 | |
56be3814 | 2010 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 2011 | } |
c906108c SS |
2012 | } |
2013 | ||
772cf8be MK |
2014 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
2015 | this for all registers. | |
2016 | ||
2017 | NOTE: Since the /proc interface will not read individual registers, | |
2018 | we will cache these requests until the process is resumed, and only | |
2019 | then write them back to the inferior process. | |
77382aee | 2020 | |
772cf8be MK |
2021 | FIXME: is that a really bad idea? Have to think about cases where |
2022 | writing one register might affect the value of others, etc. */ | |
c906108c | 2023 | |
f6ac5f3d PA |
2024 | void |
2025 | procfs_target::store_registers (struct regcache *regcache, int regnum) | |
c3f6f71d | 2026 | { |
772cf8be MK |
2027 | gdb_gregset_t *gregs; |
2028 | procinfo *pi; | |
222312d3 | 2029 | ptid_t ptid = regcache->ptid (); |
e99b03dc | 2030 | int pid = ptid.pid (); |
e38504b3 | 2031 | int tid = ptid.lwp (); |
ac7936df | 2032 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2033 | |
2689673f | 2034 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2035 | |
2036 | if (pi == NULL) | |
8a3fe4f8 | 2037 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
a068643d | 2038 | target_pid_to_str (ptid).c_str ()); |
c906108c | 2039 | |
772cf8be MK |
2040 | gregs = proc_get_gregs (pi); |
2041 | if (gregs == NULL) | |
c3f6f71d | 2042 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 2043 | |
56be3814 | 2044 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
2045 | if (!proc_set_gregs (pi)) |
2046 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 2047 | |
40a6adc1 | 2048 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2049 | { |
772cf8be MK |
2050 | gdb_fpregset_t *fpregs; |
2051 | ||
40a6adc1 MD |
2052 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2053 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2054 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2055 | return; /* Not a floating point register. */ |
60054393 | 2056 | |
772cf8be MK |
2057 | fpregs = proc_get_fpregs (pi); |
2058 | if (fpregs == NULL) | |
60054393 MS |
2059 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
2060 | ||
56be3814 | 2061 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
2062 | if (!proc_set_fpregs (pi)) |
2063 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
2064 | } | |
c3f6f71d | 2065 | } |
c906108c | 2066 | |
37de36c6 KB |
2067 | static int |
2068 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
2069 | { | |
37de36c6 KB |
2070 | if (scall == SYS_lwp_exit) |
2071 | return 1; | |
37de36c6 KB |
2072 | return 0; |
2073 | } | |
2074 | ||
2075 | static int | |
2076 | syscall_is_exit (procinfo *pi, int scall) | |
2077 | { | |
37de36c6 KB |
2078 | if (scall == SYS_exit) |
2079 | return 1; | |
37de36c6 KB |
2080 | return 0; |
2081 | } | |
2082 | ||
2083 | static int | |
2084 | syscall_is_exec (procinfo *pi, int scall) | |
2085 | { | |
2086 | #ifdef SYS_exec | |
2087 | if (scall == SYS_exec) | |
2088 | return 1; | |
2089 | #endif | |
37de36c6 KB |
2090 | if (scall == SYS_execve) |
2091 | return 1; | |
37de36c6 KB |
2092 | return 0; |
2093 | } | |
2094 | ||
2095 | static int | |
2096 | syscall_is_lwp_create (procinfo *pi, int scall) | |
2097 | { | |
37de36c6 KB |
2098 | if (scall == SYS_lwp_create) |
2099 | return 1; | |
37de36c6 KB |
2100 | return 0; |
2101 | } | |
2102 | ||
77382aee PA |
2103 | /* Retrieve the next stop event from the child process. If child has |
2104 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
2105 | (or possibly wait eventcodes) into gdb internal event codes. | |
2106 | Returns the id of process (and possibly thread) that incurred the | |
2107 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 2108 | |
f6ac5f3d PA |
2109 | ptid_t |
2110 | procfs_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
2111 | int options) | |
c906108c | 2112 | { |
0df8b418 | 2113 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 2114 | procinfo *pi; |
39f77062 KB |
2115 | int wstat; |
2116 | int temp_tid; | |
2117 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
2118 | int why, what, flags; |
2119 | int retry = 0; | |
c906108c | 2120 | |
c3f6f71d | 2121 | wait_again: |
c906108c | 2122 | |
c3f6f71d JM |
2123 | retry++; |
2124 | wstat = 0; | |
f2907e49 | 2125 | retval = ptid_t (-1); |
c906108c | 2126 | |
0df8b418 | 2127 | /* Find procinfo for main process. */ |
e99b03dc | 2128 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d | 2129 | if (pi) |
c906108c | 2130 | { |
0df8b418 | 2131 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
2132 | pi->status_valid = 0; |
2133 | pi->gregs_valid = 0; | |
2134 | pi->fpregs_valid = 0; | |
2135 | ||
0df8b418 | 2136 | #if 0 /* just try this out... */ |
c3f6f71d JM |
2137 | flags = proc_flags (pi); |
2138 | why = proc_why (pi); | |
2139 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 2140 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
2141 | #endif |
2142 | /* If child is not stopped, wait for it to stop. */ | |
c475f569 RO |
2143 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
2144 | && !proc_wait_for_stop (pi)) | |
c906108c | 2145 | { |
0df8b418 | 2146 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 2147 | if (errno == ENOENT) |
c906108c | 2148 | { |
39f77062 KB |
2149 | int wait_retval; |
2150 | ||
0df8b418 | 2151 | /* /proc file not found; presumably child has terminated. */ |
f6ac5f3d | 2152 | wait_retval = ::wait (&wstat); /* "wait" for the child's exit. */ |
c3f6f71d | 2153 | |
dfd4cc63 | 2154 | /* Wrong child? */ |
e99b03dc | 2155 | if (wait_retval != inferior_ptid.pid ()) |
3e43a32a MS |
2156 | error (_("procfs: couldn't stop " |
2157 | "process %d: wait returned %d."), | |
e99b03dc | 2158 | inferior_ptid.pid (), wait_retval); |
c3f6f71d | 2159 | /* FIXME: might I not just use waitpid? |
0df8b418 | 2160 | Or try find_procinfo to see if I know about this child? */ |
f2907e49 | 2161 | retval = ptid_t (wait_retval); |
c906108c | 2162 | } |
d1566ff5 FN |
2163 | else if (errno == EINTR) |
2164 | goto wait_again; | |
c3f6f71d | 2165 | else |
c906108c | 2166 | { |
0df8b418 | 2167 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 2168 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 2169 | } |
c3f6f71d JM |
2170 | } |
2171 | else | |
2172 | { | |
2173 | /* This long block is reached if either: | |
2174 | a) the child was already stopped, or | |
2175 | b) we successfully waited for the child with wait_for_stop. | |
2176 | This block will analyze the /proc status, and translate it | |
2177 | into a waitstatus for GDB. | |
2178 | ||
2179 | If we actually had to call wait because the /proc file | |
19958708 | 2180 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
2181 | because we already have a waitstatus. */ |
2182 | ||
2183 | flags = proc_flags (pi); | |
2184 | why = proc_why (pi); | |
2185 | what = proc_what (pi); | |
2186 | ||
c3f6f71d | 2187 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 2188 | { |
c3f6f71d JM |
2189 | /* If it's running async (for single_thread control), |
2190 | set it back to normal again. */ | |
2191 | if (flags & PR_ASYNC) | |
2192 | if (!proc_unset_async (pi)) | |
2193 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
c3f6f71d JM |
2194 | |
2195 | if (info_verbose) | |
2196 | proc_prettyprint_why (why, what, 1); | |
2197 | ||
2198 | /* The 'pid' we will return to GDB is composed of | |
2199 | the process ID plus the lwp ID. */ | |
fd79271b | 2200 | retval = ptid_t (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
2201 | |
2202 | switch (why) { | |
2203 | case PR_SIGNALLED: | |
2204 | wstat = (what << 8) | 0177; | |
2205 | break; | |
2206 | case PR_SYSENTRY: | |
37de36c6 | 2207 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 2208 | { |
17faa917 DJ |
2209 | if (print_thread_events) |
2210 | printf_unfiltered (_("[%s exited]\n"), | |
a068643d | 2211 | target_pid_to_str (retval).c_str ()); |
5b6d1e4f | 2212 | delete_thread (find_thread_ptid (this, retval)); |
37de36c6 KB |
2213 | status->kind = TARGET_WAITKIND_SPURIOUS; |
2214 | return retval; | |
2215 | } | |
2216 | else if (syscall_is_exit (pi, what)) | |
2217 | { | |
181e7f93 PA |
2218 | struct inferior *inf; |
2219 | ||
0df8b418 | 2220 | /* Handle SYS_exit call only. */ |
37de36c6 | 2221 | /* Stopped at entry to SYS_exit. |
19958708 | 2222 | Make it runnable, resume it, then use |
37de36c6 | 2223 | the wait system call to get its exit code. |
19958708 | 2224 | Proc_run_process always clears the current |
37de36c6 KB |
2225 | fault and signal. |
2226 | Then return its exit status. */ | |
2227 | pi->status_valid = 0; | |
2228 | wstat = 0; | |
19958708 | 2229 | /* FIXME: what we should do is return |
37de36c6 KB |
2230 | TARGET_WAITKIND_SPURIOUS. */ |
2231 | if (!proc_run_process (pi, 0, 0)) | |
2232 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 | 2233 | |
5b6d1e4f | 2234 | inf = find_inferior_pid (this, pi->pid); |
181e7f93 | 2235 | if (inf->attach_flag) |
c3f6f71d | 2236 | { |
19958708 | 2237 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
2238 | return a "success" exit code. Bogus: what if |
2239 | it returns something else? */ | |
2240 | wstat = 0; | |
39f77062 | 2241 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
2242 | } |
2243 | else | |
2244 | { | |
f6ac5f3d | 2245 | int temp = ::wait (&wstat); |
37de36c6 KB |
2246 | |
2247 | /* FIXME: shouldn't I make sure I get the right | |
2248 | event from the right process? If (for | |
2249 | instance) I have killed an earlier inferior | |
2250 | process but failed to clean up after it | |
2251 | somehow, I could get its termination event | |
2252 | here. */ | |
2253 | ||
0df8b418 MS |
2254 | /* If wait returns -1, that's what we return |
2255 | to GDB. */ | |
37de36c6 | 2256 | if (temp < 0) |
f2907e49 | 2257 | retval = ptid_t (temp); |
c3f6f71d | 2258 | } |
c3f6f71d | 2259 | } |
37de36c6 KB |
2260 | else |
2261 | { | |
a3f17187 | 2262 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
2263 | proc_prettyprint_syscall (proc_what (pi), 0); |
2264 | printf_filtered ("\n"); | |
44122162 RO |
2265 | |
2266 | long i, nsysargs, *sysargs; | |
2267 | ||
c475f569 RO |
2268 | nsysargs = proc_nsysarg (pi); |
2269 | sysargs = proc_sysargs (pi); | |
2270 | ||
2271 | if (nsysargs > 0 && sysargs != NULL) | |
44122162 RO |
2272 | { |
2273 | printf_filtered (_("%ld syscall arguments:\n"), | |
2274 | nsysargs); | |
2275 | for (i = 0; i < nsysargs; i++) | |
2276 | printf_filtered ("#%ld: 0x%08lx\n", | |
2277 | i, sysargs[i]); | |
2278 | } | |
2279 | ||
37de36c6 KB |
2280 | if (status) |
2281 | { | |
0df8b418 MS |
2282 | /* How to exit gracefully, returning "unknown |
2283 | event". */ | |
37de36c6 | 2284 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2285 | return inferior_ptid; |
37de36c6 KB |
2286 | } |
2287 | else | |
2288 | { | |
2289 | /* How to keep going without returning to wfi: */ | |
049a8570 | 2290 | target_continue_no_signal (ptid); |
37de36c6 KB |
2291 | goto wait_again; |
2292 | } | |
2293 | } | |
2294 | break; | |
2295 | case PR_SYSEXIT: | |
2296 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 2297 | { |
37de36c6 KB |
2298 | /* Hopefully this is our own "fork-child" execing |
2299 | the real child. Hoax this event into a trap, and | |
2300 | GDB will see the child about to execute its start | |
0df8b418 | 2301 | address. */ |
37de36c6 KB |
2302 | wstat = (SIGTRAP << 8) | 0177; |
2303 | } | |
2304 | else if (syscall_is_lwp_create (pi, what)) | |
2305 | { | |
77382aee PA |
2306 | /* This syscall is somewhat like fork/exec. We |
2307 | will get the event twice: once for the parent | |
2308 | LWP, and once for the child. We should already | |
2309 | know about the parent LWP, but the child will | |
2310 | be new to us. So, whenever we get this event, | |
2311 | if it represents a new thread, simply add the | |
2312 | thread to the list. */ | |
c3f6f71d | 2313 | |
37de36c6 | 2314 | /* If not in procinfo list, add it. */ |
39f77062 KB |
2315 | temp_tid = proc_get_current_thread (pi); |
2316 | if (!find_procinfo (pi->pid, temp_tid)) | |
2317 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 2318 | |
fd79271b | 2319 | temp_ptid = ptid_t (pi->pid, temp_tid, 0); |
37de36c6 | 2320 | /* If not in GDB's thread list, add it. */ |
5b6d1e4f PA |
2321 | if (!in_thread_list (this, temp_ptid)) |
2322 | add_thread (this, temp_ptid); | |
93815fbf | 2323 | |
0df8b418 | 2324 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 2325 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2326 | return inferior_ptid; |
37de36c6 KB |
2327 | } |
2328 | else if (syscall_is_lwp_exit (pi, what)) | |
2329 | { | |
17faa917 DJ |
2330 | if (print_thread_events) |
2331 | printf_unfiltered (_("[%s exited]\n"), | |
a068643d | 2332 | target_pid_to_str (retval).c_str ()); |
5b6d1e4f | 2333 | delete_thread (find_thread_ptid (this, retval)); |
37de36c6 KB |
2334 | status->kind = TARGET_WAITKIND_SPURIOUS; |
2335 | return retval; | |
c3f6f71d | 2336 | } |
37de36c6 KB |
2337 | else if (0) |
2338 | { | |
2339 | /* FIXME: Do we need to handle SYS_sproc, | |
2340 | SYS_fork, or SYS_vfork here? The old procfs | |
2341 | seemed to use this event to handle threads on | |
2342 | older (non-LWP) systems, where I'm assuming | |
19958708 | 2343 | that threads were actually separate processes. |
37de36c6 KB |
2344 | Irix, maybe? Anyway, low priority for now. */ |
2345 | } | |
2346 | else | |
2347 | { | |
a3f17187 | 2348 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
2349 | proc_prettyprint_syscall (proc_what (pi), 0); |
2350 | printf_filtered ("\n"); | |
44122162 RO |
2351 | |
2352 | long i, nsysargs, *sysargs; | |
2353 | ||
c475f569 RO |
2354 | nsysargs = proc_nsysarg (pi); |
2355 | sysargs = proc_sysargs (pi); | |
2356 | ||
2357 | if (nsysargs > 0 && sysargs != NULL) | |
44122162 RO |
2358 | { |
2359 | printf_filtered (_("%ld syscall arguments:\n"), | |
2360 | nsysargs); | |
2361 | for (i = 0; i < nsysargs; i++) | |
2362 | printf_filtered ("#%ld: 0x%08lx\n", | |
2363 | i, sysargs[i]); | |
2364 | } | |
2365 | ||
37de36c6 | 2366 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2367 | return inferior_ptid; |
37de36c6 | 2368 | } |
c3f6f71d JM |
2369 | break; |
2370 | case PR_REQUESTED: | |
2371 | #if 0 /* FIXME */ | |
2372 | wstat = (SIGSTOP << 8) | 0177; | |
2373 | break; | |
2374 | #else | |
2375 | if (retry < 5) | |
2376 | { | |
a3f17187 | 2377 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
2378 | pi->status_valid = 0; |
2379 | goto wait_again; | |
2380 | } | |
2381 | else | |
2382 | { | |
2383 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
2384 | temp_tid = proc_get_current_thread (pi); |
2385 | if (!find_procinfo (pi->pid, temp_tid)) | |
2386 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
2387 | |
2388 | /* If not in GDB's thread list, add it. */ | |
fd79271b | 2389 | temp_ptid = ptid_t (pi->pid, temp_tid, 0); |
5b6d1e4f PA |
2390 | if (!in_thread_list (this, temp_ptid)) |
2391 | add_thread (this, temp_ptid); | |
c3f6f71d JM |
2392 | |
2393 | status->kind = TARGET_WAITKIND_STOPPED; | |
b196bc4c | 2394 | status->value.sig = GDB_SIGNAL_0; |
c3f6f71d JM |
2395 | return retval; |
2396 | } | |
2397 | #endif | |
2398 | case PR_JOBCONTROL: | |
2399 | wstat = (what << 8) | 0177; | |
2400 | break; | |
2401 | case PR_FAULTED: | |
7a289707 RO |
2402 | { |
2403 | int signo = pi->prstatus.pr_lwp.pr_info.si_signo; | |
2404 | if (signo != 0) | |
2405 | wstat = (signo << 8) | 0177; | |
c3f6f71d | 2406 | } |
7a289707 | 2407 | break; |
c3f6f71d JM |
2408 | default: /* switch (why) unmatched */ |
2409 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 2410 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2411 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2412 | error (_("... giving up...")); |
c3f6f71d JM |
2413 | break; |
2414 | } | |
77382aee PA |
2415 | /* Got this far without error: If retval isn't in the |
2416 | threads database, add it. */ | |
c475f569 RO |
2417 | if (retval.pid () > 0 |
2418 | && retval != inferior_ptid | |
5b6d1e4f | 2419 | && !in_thread_list (this, retval)) |
c906108c | 2420 | { |
77382aee PA |
2421 | /* We have a new thread. We need to add it both to |
2422 | GDB's list and to our own. If we don't create a | |
2423 | procinfo, resume may be unhappy later. */ | |
5b6d1e4f | 2424 | add_thread (this, retval); |
e99b03dc | 2425 | if (find_procinfo (retval.pid (), |
e38504b3 | 2426 | retval.lwp ()) == NULL) |
e99b03dc | 2427 | create_procinfo (retval.pid (), |
e38504b3 | 2428 | retval.lwp ()); |
c906108c | 2429 | } |
c906108c | 2430 | } |
0df8b418 | 2431 | else /* Flags do not indicate STOPPED. */ |
c906108c | 2432 | { |
0df8b418 | 2433 | /* surely this can't happen... */ |
c3f6f71d JM |
2434 | printf_filtered ("procfs:%d -- process not stopped.\n", |
2435 | __LINE__); | |
2436 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 2437 | error (_("procfs: ...giving up...")); |
c906108c | 2438 | } |
c906108c | 2439 | } |
c906108c | 2440 | |
c3f6f71d JM |
2441 | if (status) |
2442 | store_waitstatus (status, wstat); | |
c906108c SS |
2443 | } |
2444 | ||
c3f6f71d JM |
2445 | return retval; |
2446 | } | |
c906108c | 2447 | |
4e73f23d RM |
2448 | /* Perform a partial transfer to/from the specified object. For |
2449 | memory transfers, fall back to the old memory xfer functions. */ | |
2450 | ||
f6ac5f3d PA |
2451 | enum target_xfer_status |
2452 | procfs_target::xfer_partial (enum target_object object, | |
2453 | const char *annex, gdb_byte *readbuf, | |
2454 | const gdb_byte *writebuf, ULONGEST offset, | |
2455 | ULONGEST len, ULONGEST *xfered_len) | |
4e73f23d RM |
2456 | { |
2457 | switch (object) | |
2458 | { | |
2459 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 2460 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d | 2461 | |
4e73f23d | 2462 | case TARGET_OBJECT_AUXV: |
f6ac5f3d | 2463 | return memory_xfer_auxv (this, object, annex, readbuf, writebuf, |
9b409511 | 2464 | offset, len, xfered_len); |
4e73f23d RM |
2465 | |
2466 | default: | |
4360561f TT |
2467 | return this->beneath ()->xfer_partial (object, annex, |
2468 | readbuf, writebuf, offset, len, | |
2469 | xfered_len); | |
4e73f23d RM |
2470 | } |
2471 | } | |
2472 | ||
e96027e0 PA |
2473 | /* Helper for procfs_xfer_partial that handles memory transfers. |
2474 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 2475 | |
e96027e0 PA |
2476 | static enum target_xfer_status |
2477 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2478 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
2479 | { |
2480 | procinfo *pi; | |
e96027e0 | 2481 | int nbytes; |
c906108c | 2482 | |
0df8b418 | 2483 | /* Find procinfo for main process. */ |
e99b03dc | 2484 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c475f569 | 2485 | if (pi->as_fd == 0 && open_procinfo_files (pi, FD_AS) == 0) |
c906108c | 2486 | { |
c3f6f71d | 2487 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 2488 | return TARGET_XFER_E_IO; |
c906108c | 2489 | } |
c906108c | 2490 | |
e96027e0 PA |
2491 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
2492 | return TARGET_XFER_E_IO; | |
2493 | ||
2494 | if (writebuf != NULL) | |
c906108c | 2495 | { |
e96027e0 PA |
2496 | PROCFS_NOTE ("write memory:\n"); |
2497 | nbytes = write (pi->as_fd, writebuf, len); | |
2498 | } | |
2499 | else | |
2500 | { | |
2501 | PROCFS_NOTE ("read memory:\n"); | |
2502 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 2503 | } |
e96027e0 PA |
2504 | if (nbytes <= 0) |
2505 | return TARGET_XFER_E_IO; | |
2506 | *xfered_len = nbytes; | |
2507 | return TARGET_XFER_OK; | |
c906108c SS |
2508 | } |
2509 | ||
77382aee PA |
2510 | /* Called by target_resume before making child runnable. Mark cached |
2511 | registers and status's invalid. If there are "dirty" caches that | |
2512 | need to be written back to the child process, do that. | |
c906108c | 2513 | |
77382aee PA |
2514 | File descriptors are also cached. As they are a limited resource, |
2515 | we cannot hold onto them indefinitely. However, as they are | |
2516 | expensive to open, we don't want to throw them away | |
85102364 | 2517 | indiscriminately either. As a compromise, we will keep the file |
77382aee PA |
2518 | descriptors for the parent process, but discard any file |
2519 | descriptors we may have accumulated for the threads. | |
2520 | ||
2521 | As this function is called by iterate_over_threads, it always | |
2522 | returns zero (so that iterate_over_threads will keep | |
2523 | iterating). */ | |
c3f6f71d JM |
2524 | |
2525 | static int | |
fba45db2 | 2526 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 2527 | { |
77382aee PA |
2528 | /* About to run the child; invalidate caches and do any other |
2529 | cleanup. */ | |
c906108c | 2530 | |
c3f6f71d JM |
2531 | #if 0 |
2532 | if (pi->gregs_dirty) | |
c475f569 | 2533 | if (parent == NULL || proc_get_current_thread (parent) != pi->tid) |
c3f6f71d JM |
2534 | if (!proc_set_gregs (pi)) /* flush gregs cache */ |
2535 | proc_warn (pi, "target_resume, set_gregs", | |
2536 | __LINE__); | |
f5656ead | 2537 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 | 2538 | if (pi->fpregs_dirty) |
c475f569 | 2539 | if (parent == NULL || proc_get_current_thread (parent) != pi->tid) |
60054393 | 2540 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ |
19958708 | 2541 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 2542 | __LINE__); |
c906108c | 2543 | #endif |
c906108c | 2544 | |
c3f6f71d | 2545 | if (parent != NULL) |
c906108c | 2546 | { |
c3f6f71d | 2547 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 2548 | Close any file descriptors that it might have open. |
c3f6f71d JM |
2549 | We don't do this to the master (parent) procinfo. */ |
2550 | ||
2551 | close_procinfo_files (pi); | |
c906108c | 2552 | } |
c3f6f71d JM |
2553 | pi->gregs_valid = 0; |
2554 | pi->fpregs_valid = 0; | |
2555 | #if 0 | |
2556 | pi->gregs_dirty = 0; | |
2557 | pi->fpregs_dirty = 0; | |
c906108c | 2558 | #endif |
c3f6f71d JM |
2559 | pi->status_valid = 0; |
2560 | pi->threads_valid = 0; | |
c906108c | 2561 | |
c3f6f71d | 2562 | return 0; |
c906108c SS |
2563 | } |
2564 | ||
0fda6bd2 | 2565 | #if 0 |
77382aee PA |
2566 | /* A callback function for iterate_over_threads. Find the |
2567 | asynchronous signal thread, and make it runnable. See if that | |
2568 | helps matters any. */ | |
c906108c | 2569 | |
c3f6f71d | 2570 | static int |
fba45db2 | 2571 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 2572 | { |
c3f6f71d JM |
2573 | #ifdef PR_ASLWP |
2574 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 2575 | { |
c3f6f71d JM |
2576 | if (!proc_run_process (pi, 0, -1)) |
2577 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
2578 | return 1; | |
c906108c | 2579 | } |
c906108c | 2580 | #endif |
c3f6f71d | 2581 | return 0; |
c906108c | 2582 | } |
0fda6bd2 | 2583 | #endif |
c906108c | 2584 | |
77382aee PA |
2585 | /* Make the child process runnable. Normally we will then call |
2586 | procfs_wait and wait for it to stop again (unless gdb is async). | |
2587 | ||
2588 | If STEP is true, then arrange for the child to stop again after | |
2589 | executing a single instruction. If SIGNO is zero, then cancel any | |
2590 | pending signal; if non-zero, then arrange for the indicated signal | |
2591 | to be delivered to the child when it runs. If PID is -1, then | |
2592 | allow any child thread to run; if non-zero, then allow only the | |
2593 | indicated thread to run. (not implemented yet). */ | |
c906108c | 2594 | |
f6ac5f3d PA |
2595 | void |
2596 | procfs_target::resume (ptid_t ptid, int step, enum gdb_signal signo) | |
c906108c | 2597 | { |
c3f6f71d JM |
2598 | procinfo *pi, *thread; |
2599 | int native_signo; | |
2600 | ||
19958708 | 2601 | /* 2.1: |
c3f6f71d | 2602 | prrun.prflags |= PRSVADDR; |
19958708 | 2603 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 2604 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 2605 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
2606 | prrun.prflags |= PRCFAULT; clear current fault. |
2607 | ||
2608 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 2609 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
2610 | PRSVADDR is unnecessary. |
2611 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
2612 | This basically leaves PRSTEP and PRCSIG. | |
2613 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
2614 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 2615 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 2616 | |
0df8b418 | 2617 | /* Find procinfo for main process. */ |
e99b03dc | 2618 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d | 2619 | |
77382aee | 2620 | /* First cut: ignore pid argument. */ |
c3f6f71d | 2621 | errno = 0; |
c906108c | 2622 | |
c3f6f71d | 2623 | /* Convert signal to host numbering. */ |
c475f569 | 2624 | if (signo == 0 || (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
2625 | native_signo = 0; |
2626 | else | |
2ea28649 | 2627 | native_signo = gdb_signal_to_host (signo); |
c906108c | 2628 | |
c3f6f71d | 2629 | pi->ignore_next_sigstop = 0; |
c906108c | 2630 | |
77382aee PA |
2631 | /* Running the process voids all cached registers and status. */ |
2632 | /* Void the threads' caches first. */ | |
19958708 | 2633 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
2634 | /* Void the process procinfo's caches. */ |
2635 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 2636 | |
e99b03dc | 2637 | if (ptid.pid () != -1) |
c906108c | 2638 | { |
77382aee PA |
2639 | /* Resume a specific thread, presumably suppressing the |
2640 | others. */ | |
e38504b3 | 2641 | thread = find_procinfo (ptid.pid (), ptid.lwp ()); |
7de45904 | 2642 | if (thread != NULL) |
c906108c | 2643 | { |
c3f6f71d JM |
2644 | if (thread->tid != 0) |
2645 | { | |
77382aee PA |
2646 | /* We're to resume a specific thread, and not the |
2647 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
2648 | if (!proc_set_async (pi)) |
2649 | proc_error (pi, "target_resume, set_async", __LINE__); | |
c3f6f71d | 2650 | #if 0 |
19958708 | 2651 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
2652 | make_signal_thread_runnable, |
2653 | NULL); | |
2654 | #endif | |
0df8b418 MS |
2655 | pi = thread; /* Substitute the thread's procinfo |
2656 | for run. */ | |
c3f6f71d | 2657 | } |
c906108c SS |
2658 | } |
2659 | } | |
c906108c | 2660 | |
c3f6f71d | 2661 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 2662 | { |
c3f6f71d | 2663 | if (errno == EBUSY) |
77382aee PA |
2664 | warning (_("resume: target already running. " |
2665 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
2666 | else |
2667 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 2668 | } |
c3f6f71d | 2669 | } |
c906108c | 2670 | |
77382aee | 2671 | /* Set up to trace signals in the child process. */ |
c906108c | 2672 | |
f6ac5f3d | 2673 | void |
adc6a863 | 2674 | procfs_target::pass_signals (gdb::array_view<const unsigned char> pass_signals) |
c3f6f71d | 2675 | { |
44122162 | 2676 | sigset_t signals; |
e99b03dc | 2677 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
2455069d | 2678 | int signo; |
c906108c | 2679 | |
2455069d UW |
2680 | prfillset (&signals); |
2681 | ||
2682 | for (signo = 0; signo < NSIG; signo++) | |
2683 | { | |
2ea28649 | 2684 | int target_signo = gdb_signal_from_host (signo); |
adc6a863 | 2685 | if (target_signo < pass_signals.size () && pass_signals[target_signo]) |
44122162 | 2686 | prdelset (&signals, signo); |
2455069d UW |
2687 | } |
2688 | ||
2689 | if (!proc_set_traced_signals (pi, &signals)) | |
2690 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 2691 | } |
c906108c | 2692 | |
77382aee | 2693 | /* Print status information about the child process. */ |
c906108c | 2694 | |
f6ac5f3d PA |
2695 | void |
2696 | procfs_target::files_info () | |
c3f6f71d | 2697 | { |
181e7f93 | 2698 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 2699 | |
a3f17187 | 2700 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 2701 | inf->attach_flag? "attached": "child", |
a068643d | 2702 | target_pid_to_str (inferior_ptid).c_str ()); |
c3f6f71d | 2703 | } |
c906108c | 2704 | |
77382aee PA |
2705 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
2706 | should only be applied to the real process, not to an LWP, because | |
2707 | of the check for parent-process. If we need this to work for an | |
2708 | LWP, it needs some more logic. */ | |
c906108c | 2709 | |
c3f6f71d | 2710 | static void |
fba45db2 | 2711 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
2712 | { |
2713 | int parent_pid; | |
c906108c | 2714 | |
c3f6f71d | 2715 | parent_pid = proc_parent_pid (pi); |
c3f6f71d | 2716 | if (!proc_kill (pi, SIGKILL)) |
103b3ef5 | 2717 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d | 2718 | destroy_procinfo (pi); |
c906108c | 2719 | |
c3f6f71d JM |
2720 | /* If pi is GDB's child, wait for it to die. */ |
2721 | if (parent_pid == getpid ()) | |
19958708 | 2722 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
2723 | Should we check the returned event? */ |
2724 | { | |
0d06e24b | 2725 | #if 0 |
c3f6f71d | 2726 | int status, ret; |
c906108c | 2727 | |
c3f6f71d JM |
2728 | ret = waitpid (pi->pid, &status, 0); |
2729 | #else | |
2730 | wait (NULL); | |
2731 | #endif | |
2732 | } | |
2733 | } | |
c906108c | 2734 | |
77382aee PA |
2735 | /* We're done debugging it, and we want it to go away. Then we want |
2736 | GDB to forget all about it. */ | |
c906108c | 2737 | |
f6ac5f3d PA |
2738 | void |
2739 | procfs_target::kill () | |
c906108c | 2740 | { |
d7e15655 | 2741 | if (inferior_ptid != null_ptid) /* ? */ |
c3f6f71d | 2742 | { |
0df8b418 | 2743 | /* Find procinfo for main process. */ |
e99b03dc | 2744 | procinfo *pi = find_procinfo (inferior_ptid.pid (), 0); |
c906108c | 2745 | |
c3f6f71d JM |
2746 | if (pi) |
2747 | unconditionally_kill_inferior (pi); | |
bc1e6c81 | 2748 | target_mourn_inferior (inferior_ptid); |
c906108c | 2749 | } |
c3f6f71d JM |
2750 | } |
2751 | ||
77382aee | 2752 | /* Forget we ever debugged this thing! */ |
c906108c | 2753 | |
f6ac5f3d PA |
2754 | void |
2755 | procfs_target::mourn_inferior () | |
c3f6f71d JM |
2756 | { |
2757 | procinfo *pi; | |
c906108c | 2758 | |
d7e15655 | 2759 | if (inferior_ptid != null_ptid) |
c3f6f71d | 2760 | { |
0df8b418 | 2761 | /* Find procinfo for main process. */ |
e99b03dc | 2762 | pi = find_procinfo (inferior_ptid.pid (), 0); |
c3f6f71d JM |
2763 | if (pi) |
2764 | destroy_procinfo (pi); | |
c906108c | 2765 | } |
6a3cb8e8 PA |
2766 | |
2767 | generic_mourn_inferior (); | |
8181d85f | 2768 | |
f6ac5f3d | 2769 | maybe_unpush_target (); |
c3f6f71d | 2770 | } |
c906108c | 2771 | |
77382aee PA |
2772 | /* When GDB forks to create a runnable inferior process, this function |
2773 | is called on the parent side of the fork. It's job is to do | |
2774 | whatever is necessary to make the child ready to be debugged, and | |
2775 | then wait for the child to synchronize. */ | |
c906108c | 2776 | |
5b6d1e4f PA |
2777 | void |
2778 | procfs_target::procfs_init_inferior (int pid) | |
c3f6f71d JM |
2779 | { |
2780 | procinfo *pi; | |
c3f6f71d | 2781 | int fail; |
2689673f | 2782 | int lwpid; |
c906108c | 2783 | |
c3f6f71d JM |
2784 | /* This routine called on the parent side (GDB side) |
2785 | after GDB forks the inferior. */ | |
5b6d1e4f PA |
2786 | if (!target_is_pushed (this)) |
2787 | push_target (this); | |
c906108c | 2788 | |
c475f569 RO |
2789 | pi = create_procinfo (pid, 0); |
2790 | if (pi == NULL) | |
9b20d036 | 2791 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
2792 | |
2793 | if (!open_procinfo_files (pi, FD_CTL)) | |
2794 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
2795 | ||
2796 | /* | |
2797 | xmalloc // done | |
2798 | open_procinfo_files // done | |
2799 | link list // done | |
2800 | prfillset (trace) | |
2801 | procfs_notice_signals | |
2802 | prfillset (fault) | |
2803 | prdelset (FLTPAGE) | |
2804 | PIOCWSTOP | |
2805 | PIOCSFAULT | |
2806 | */ | |
2807 | ||
77382aee | 2808 | /* If not stopped yet, wait for it to stop. */ |
c475f569 | 2809 | if (!(proc_flags (pi) & PR_STOPPED) && !(proc_wait_for_stop (pi))) |
c3f6f71d JM |
2810 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); |
2811 | ||
2812 | /* Save some of the /proc state to be restored if we detach. */ | |
2813 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 2814 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
2815 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
2816 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
2817 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2818 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
2819 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2820 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 2821 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 2822 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 2823 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2824 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
2825 | ||
c475f569 RO |
2826 | fail = procfs_debug_inferior (pi); |
2827 | if (fail != 0) | |
c3f6f71d JM |
2828 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); |
2829 | ||
0d06e24b JM |
2830 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
2831 | and possibly even turning ON kill-on-last-close at this point. But | |
2832 | I can't make that change without careful testing which I don't have | |
2833 | time to do right now... */ | |
c3f6f71d JM |
2834 | /* Turn on run-on-last-close flag so that the child |
2835 | will die if GDB goes away for some reason. */ | |
2836 | if (!proc_set_run_on_last_close (pi)) | |
2837 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
2838 | ||
2689673f PA |
2839 | /* We now have have access to the lwpid of the main thread/lwp. */ |
2840 | lwpid = proc_get_current_thread (pi); | |
2841 | ||
2842 | /* Create a procinfo for the main lwp. */ | |
2843 | create_procinfo (pid, lwpid); | |
2844 | ||
2845 | /* We already have a main thread registered in the thread table at | |
2846 | this point, but it didn't have any lwp info yet. Notify the core | |
2847 | about it. This changes inferior_ptid as well. */ | |
5b6d1e4f | 2848 | thread_change_ptid (this, ptid_t (pid), ptid_t (pid, lwpid, 0)); |
c906108c | 2849 | |
2090129c | 2850 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c3f6f71d | 2851 | } |
c906108c | 2852 | |
77382aee PA |
2853 | /* When GDB forks to create a new process, this function is called on |
2854 | the child side of the fork before GDB exec's the user program. Its | |
2855 | job is to make the child minimally debuggable, so that the parent | |
2856 | GDB process can connect to the child and take over. This function | |
2857 | should do only the minimum to make that possible, and to | |
2858 | synchronize with the parent process. The parent process should | |
2859 | take care of the details. */ | |
c3f6f71d JM |
2860 | |
2861 | static void | |
fba45db2 | 2862 | procfs_set_exec_trap (void) |
c3f6f71d JM |
2863 | { |
2864 | /* This routine called on the child side (inferior side) | |
2865 | after GDB forks the inferior. It must use only local variables, | |
2866 | because it may be sharing data space with its parent. */ | |
c906108c | 2867 | |
c3f6f71d | 2868 | procinfo *pi; |
37de36c6 | 2869 | sysset_t *exitset; |
c906108c | 2870 | |
c475f569 RO |
2871 | pi = create_procinfo (getpid (), 0); |
2872 | if (pi == NULL) | |
e2e0b3e5 | 2873 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 2874 | |
c3f6f71d JM |
2875 | if (open_procinfo_files (pi, FD_CTL) == 0) |
2876 | { | |
2877 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
2878 | gdb_flush (gdb_stderr); | |
77382aee PA |
2879 | /* No need to call "dead_procinfo", because we're going to |
2880 | exit. */ | |
c3f6f71d JM |
2881 | _exit (127); |
2882 | } | |
c906108c | 2883 | |
44122162 | 2884 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
2885 | /* GW: Rationale... |
2886 | Not all systems with /proc have all the exec* syscalls with the same | |
2887 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 2888 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 2889 | |
c475f569 | 2890 | exitset = XNEW (sysset_t); |
44122162 | 2891 | premptyset (exitset); |
c3f6f71d | 2892 | #ifdef SYS_exec |
44122162 | 2893 | praddset (exitset, SYS_exec); |
c906108c | 2894 | #endif |
44122162 | 2895 | praddset (exitset, SYS_execve); |
37de36c6 KB |
2896 | |
2897 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 2898 | { |
c3f6f71d JM |
2899 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
2900 | gdb_flush (gdb_stderr); | |
2901 | _exit (127); | |
c906108c | 2902 | } |
c3f6f71d | 2903 | |
0df8b418 | 2904 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
2905 | /* Turn off inherit on fork flag so that all grand-children |
2906 | of gdb start with tracing flags cleared. */ | |
2907 | if (!proc_unset_inherit_on_fork (pi)) | |
2908 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
2909 | ||
2910 | /* Turn off run on last close flag, so that the child process | |
2911 | cannot run away just because we close our handle on it. | |
2912 | We want it to wait for the parent to attach. */ | |
2913 | if (!proc_unset_run_on_last_close (pi)) | |
2914 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
2915 | ||
19958708 | 2916 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 2917 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 2918 | /*destroy_procinfo (pi);*/ |
c906108c | 2919 | } |
c906108c | 2920 | |
77382aee PA |
2921 | /* This function is called BEFORE gdb forks the inferior process. Its |
2922 | only real responsibility is to set things up for the fork, and tell | |
2923 | GDB which two functions to call after the fork (one for the parent, | |
2924 | and one for the child). | |
2925 | ||
2926 | This function does a complicated search for a unix shell program, | |
2927 | which it then uses to parse arguments and environment variables to | |
2928 | be sent to the child. I wonder whether this code could not be | |
2929 | abstracted out and shared with other unix targets such as | |
2930 | inf-ptrace? */ | |
c906108c | 2931 | |
f6ac5f3d PA |
2932 | void |
2933 | procfs_target::create_inferior (const char *exec_file, | |
2934 | const std::string &allargs, | |
2935 | char **env, int from_tty) | |
c906108c | 2936 | { |
974e6844 | 2937 | const char *shell_file = get_shell (); |
c906108c | 2938 | char *tryname; |
28439f5e PA |
2939 | int pid; |
2940 | ||
974e6844 | 2941 | if (strchr (shell_file, '/') == NULL) |
c906108c SS |
2942 | { |
2943 | ||
2944 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
2945 | just do this the normal way (via execlp, which operates by |
2946 | attempting an exec for each element of the PATH until it | |
2947 | finds one which succeeds), then there will be an exec for | |
2948 | each failed attempt, each of which will cause a PR_SYSEXIT | |
2949 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
2950 | for these failed execs with the ones for successful execs | |
2951 | (whether the exec has succeeded is stored at that time in the | |
2952 | carry bit or some such architecture-specific and | |
2953 | non-ABI-specified place). | |
2954 | ||
2955 | So I can't think of anything better than to search the PATH | |
2956 | now. This has several disadvantages: (1) There is a race | |
2957 | condition; if we find a file now and it is deleted before we | |
2958 | exec it, we lose, even if the deletion leaves a valid file | |
2959 | further down in the PATH, (2) there is no way to know exactly | |
2960 | what an executable (in the sense of "capable of being | |
2961 | exec'd") file is. Using access() loses because it may lose | |
2962 | if the caller is the superuser; failing to use it loses if | |
2963 | there are ACLs or some such. */ | |
c906108c | 2964 | |
995816ba PA |
2965 | const char *p; |
2966 | const char *p1; | |
c906108c | 2967 | /* FIXME-maybe: might want "set path" command so user can change what |
c3f6f71d | 2968 | path is used from within GDB. */ |
995816ba | 2969 | const char *path = getenv ("PATH"); |
c906108c SS |
2970 | int len; |
2971 | struct stat statbuf; | |
2972 | ||
2973 | if (path == NULL) | |
2974 | path = "/bin:/usr/bin"; | |
2975 | ||
b196bc4c | 2976 | tryname = (char *) alloca (strlen (path) + strlen (shell_file) + 2); |
c3f6f71d | 2977 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
2978 | { |
2979 | p1 = strchr (p, ':'); | |
2980 | if (p1 != NULL) | |
2981 | len = p1 - p; | |
2982 | else | |
2983 | len = strlen (p); | |
2984 | strncpy (tryname, p, len); | |
2985 | tryname[len] = '\0'; | |
2986 | strcat (tryname, "/"); | |
2987 | strcat (tryname, shell_file); | |
2988 | if (access (tryname, X_OK) < 0) | |
2989 | continue; | |
2990 | if (stat (tryname, &statbuf) < 0) | |
2991 | continue; | |
2992 | if (!S_ISREG (statbuf.st_mode)) | |
2993 | /* We certainly need to reject directories. I'm not quite | |
2994 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
2995 | that people want to exec() these things. */ | |
2996 | continue; | |
2997 | break; | |
2998 | } | |
2999 | if (p == NULL) | |
3000 | /* Not found. This must be an error rather than merely passing | |
3001 | the file to execlp(), because execlp() would try all the | |
3002 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 3003 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 3004 | __LINE__, shell_file); |
c906108c SS |
3005 | |
3006 | shell_file = tryname; | |
3007 | } | |
3008 | ||
28439f5e | 3009 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 3010 | NULL, NULL, shell_file, NULL); |
28439f5e | 3011 | |
2090129c SDJ |
3012 | /* We have something that executes now. We'll be running through |
3013 | the shell at this point (if startup-with-shell is true), but the | |
3014 | pid shouldn't change. */ | |
7fb43e53 PA |
3015 | thread_info *thr = add_thread_silent (this, ptid_t (pid)); |
3016 | switch_to_thread (thr); | |
2090129c | 3017 | |
5b6d1e4f | 3018 | procfs_init_inferior (pid); |
27087a3d JB |
3019 | } |
3020 | ||
3021 | /* An observer for the "inferior_created" event. */ | |
c906108c | 3022 | |
27087a3d JB |
3023 | static void |
3024 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
3025 | { | |
c906108c SS |
3026 | } |
3027 | ||
e8032dde | 3028 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 3029 | |
c3f6f71d | 3030 | static int |
fba45db2 | 3031 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 3032 | { |
fd79271b | 3033 | ptid_t gdb_threadid = ptid_t (pi->pid, thread->tid, 0); |
c906108c | 3034 | |
5b6d1e4f | 3035 | thread_info *thr = find_thread_ptid (&the_procfs_target, gdb_threadid); |
24bce9bb | 3036 | if (thr == NULL || thr->state == THREAD_EXITED) |
5b6d1e4f | 3037 | add_thread (&the_procfs_target, gdb_threadid); |
c906108c | 3038 | |
c3f6f71d JM |
3039 | return 0; |
3040 | } | |
3041 | ||
77382aee PA |
3042 | /* Query all the threads that the target knows about, and give them |
3043 | back to GDB to add to its list. */ | |
c3f6f71d | 3044 | |
f6ac5f3d PA |
3045 | void |
3046 | procfs_target::update_thread_list () | |
c3f6f71d JM |
3047 | { |
3048 | procinfo *pi; | |
3049 | ||
e8032dde PA |
3050 | prune_threads (); |
3051 | ||
0df8b418 | 3052 | /* Find procinfo for main process. */ |
e99b03dc | 3053 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d JM |
3054 | proc_update_threads (pi); |
3055 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
3056 | } |
3057 | ||
77382aee PA |
3058 | /* Return true if the thread is still 'alive'. This guy doesn't |
3059 | really seem to be doing his job. Got to investigate how to tell | |
3060 | when a thread is really gone. */ | |
c906108c | 3061 | |
57810aa7 | 3062 | bool |
f6ac5f3d | 3063 | procfs_target::thread_alive (ptid_t ptid) |
c906108c | 3064 | { |
c3f6f71d JM |
3065 | int proc, thread; |
3066 | procinfo *pi; | |
c906108c | 3067 | |
e99b03dc | 3068 | proc = ptid.pid (); |
e38504b3 | 3069 | thread = ptid.lwp (); |
0df8b418 | 3070 | /* If I don't know it, it ain't alive! */ |
c475f569 RO |
3071 | pi = find_procinfo (proc, thread); |
3072 | if (pi == NULL) | |
57810aa7 | 3073 | return false; |
c3f6f71d JM |
3074 | |
3075 | /* If I can't get its status, it ain't alive! | |
3076 | What's more, I need to forget about it! */ | |
3077 | if (!proc_get_status (pi)) | |
3078 | { | |
3079 | destroy_procinfo (pi); | |
57810aa7 | 3080 | return false; |
c3f6f71d | 3081 | } |
77382aee PA |
3082 | /* I couldn't have got its status if it weren't alive, so it's |
3083 | alive. */ | |
57810aa7 | 3084 | return true; |
c906108c | 3085 | } |
c3f6f71d | 3086 | |
a068643d | 3087 | /* Convert PTID to a string. */ |
c3f6f71d | 3088 | |
a068643d | 3089 | std::string |
f6ac5f3d | 3090 | procfs_target::pid_to_str (ptid_t ptid) |
c3f6f71d | 3091 | { |
e38504b3 | 3092 | if (ptid.lwp () == 0) |
a068643d | 3093 | return string_printf ("process %d", ptid.pid ()); |
c3f6f71d | 3094 | else |
a068643d | 3095 | return string_printf ("LWP %ld", ptid.lwp ()); |
c3f6f71d JM |
3096 | } |
3097 | ||
4206c05e RO |
3098 | /* Accepts an integer PID; Returns a string representing a file that |
3099 | can be opened to get the symbols for the child process. */ | |
3100 | ||
3101 | char * | |
3102 | procfs_target::pid_to_exec_file (int pid) | |
3103 | { | |
3104 | static char buf[PATH_MAX]; | |
3105 | char name[PATH_MAX]; | |
3106 | ||
3107 | /* Solaris 11 introduced /proc/<proc-id>/execname. */ | |
c475f569 | 3108 | xsnprintf (name, sizeof (name), "/proc/%d/execname", pid); |
4206c05e RO |
3109 | scoped_fd fd (gdb_open_cloexec (name, O_RDONLY, 0)); |
3110 | if (fd.get () < 0 || read (fd.get (), buf, PATH_MAX - 1) < 0) | |
3111 | { | |
3112 | /* If that fails, fall back to /proc/<proc-id>/path/a.out introduced in | |
3113 | Solaris 10. */ | |
3114 | ssize_t len; | |
3115 | ||
c475f569 | 3116 | xsnprintf (name, sizeof (name), "/proc/%d/path/a.out", pid); |
4206c05e RO |
3117 | len = readlink (name, buf, PATH_MAX - 1); |
3118 | if (len <= 0) | |
3119 | strcpy (buf, name); | |
3120 | else | |
3121 | buf[len] = '\0'; | |
3122 | } | |
3123 | ||
3124 | return buf; | |
3125 | } | |
3126 | ||
77382aee | 3127 | /* Insert a watchpoint. */ |
c3f6f71d | 3128 | |
a0911fd0 | 3129 | static int |
39f77062 | 3130 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 3131 | int after) |
c906108c | 3132 | { |
c3f6f71d | 3133 | int pflags = 0; |
19958708 | 3134 | procinfo *pi; |
c3f6f71d | 3135 | |
e99b03dc TT |
3136 | pi = find_procinfo_or_die (ptid.pid () == -1 ? |
3137 | inferior_ptid.pid () : ptid.pid (), | |
dfd4cc63 | 3138 | 0); |
c3f6f71d | 3139 | |
0df8b418 MS |
3140 | /* Translate from GDB's flags to /proc's. */ |
3141 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 3142 | { |
0df8b418 | 3143 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
3144 | case hw_write: /* default watchpoint (write) */ |
3145 | pflags = WRITE_WATCHFLAG; | |
3146 | break; | |
3147 | case hw_read: /* read watchpoint */ | |
3148 | pflags = READ_WATCHFLAG; | |
3149 | break; | |
3150 | case hw_access: /* access watchpoint */ | |
3151 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
3152 | break; | |
3153 | case hw_execute: /* execution HW breakpoint */ | |
3154 | pflags = EXEC_WATCHFLAG; | |
3155 | break; | |
0df8b418 | 3156 | default: /* Something weird. Return error. */ |
c906108c | 3157 | return -1; |
c3f6f71d | 3158 | } |
0df8b418 | 3159 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
3160 | pflags |= AFTER_WATCHFLAG; |
3161 | } | |
3162 | ||
3163 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
3164 | { | |
0df8b418 | 3165 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
3166 | return -1; /* fail */ |
3167 | /* GDB may try to remove the same watchpoint twice. | |
3168 | If a remove request returns no match, don't error. */ | |
c906108c | 3169 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
3170 | return 0; /* ignore */ |
3171 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c SS |
3172 | } |
3173 | return 0; | |
3174 | } | |
3175 | ||
1e03ad20 KB |
3176 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
3177 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
3178 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
3179 | far. | |
19958708 | 3180 | |
1e03ad20 KB |
3181 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
3182 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 3183 | target_can_use_hardware_watchpoint. */ |
1e03ad20 | 3184 | |
f6ac5f3d PA |
3185 | int |
3186 | procfs_target::can_use_hw_breakpoint (enum bptype type, int cnt, int othertype) | |
1e03ad20 | 3187 | { |
1e03ad20 KB |
3188 | /* Due to the way that proc_set_watchpoint() is implemented, host |
3189 | and target pointers must be of the same size. If they are not, | |
3190 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
3191 | fact that proc_set_watchpoint() calls |
3192 | procfs_address_to_host_pointer(); a close inspection of | |
3193 | procfs_address_to_host_pointer will reveal that an internal error | |
3194 | will be generated when the host and target pointer sizes are | |
3195 | different. */ | |
f5656ead | 3196 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 3197 | |
4e906f53 | 3198 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
3199 | return 0; |
3200 | ||
3201 | /* Other tests here??? */ | |
3202 | ||
3203 | return 1; | |
1e03ad20 KB |
3204 | } |
3205 | ||
77382aee PA |
3206 | /* Returns non-zero if process is stopped on a hardware watchpoint |
3207 | fault, else returns zero. */ | |
c3f6f71d | 3208 | |
57810aa7 | 3209 | bool |
f6ac5f3d | 3210 | procfs_target::stopped_by_watchpoint () |
c906108c | 3211 | { |
c3f6f71d | 3212 | procinfo *pi; |
c906108c | 3213 | |
e99b03dc | 3214 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
aaeb7efa | 3215 | |
c3f6f71d | 3216 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c475f569 RO |
3217 | if (proc_why (pi) == PR_FAULTED) |
3218 | if (proc_what (pi) == FLTWATCH) | |
3219 | return true; | |
57810aa7 | 3220 | return false; |
c906108c | 3221 | } |
c906108c | 3222 | |
77382aee PA |
3223 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
3224 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
3225 | address. This function is only called if | |
3226 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
3227 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c | 3228 | |
57810aa7 | 3229 | bool |
f6ac5f3d | 3230 | procfs_target::stopped_data_address (CORE_ADDR *addr) |
bf701c2c PM |
3231 | { |
3232 | procinfo *pi; | |
3233 | ||
e99b03dc | 3234 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
bf701c2c PM |
3235 | return proc_watchpoint_address (pi, addr); |
3236 | } | |
3237 | ||
f6ac5f3d PA |
3238 | int |
3239 | procfs_target::insert_watchpoint (CORE_ADDR addr, int len, | |
3240 | enum target_hw_bp_type type, | |
3241 | struct expression *cond) | |
25513619 | 3242 | { |
d92524f1 | 3243 | if (!target_have_steppable_watchpoint |
f5656ead | 3244 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
c475f569 RO |
3245 | /* When a hardware watchpoint fires off the PC will be left at |
3246 | the instruction following the one which caused the | |
3247 | watchpoint. It will *NOT* be necessary for GDB to step over | |
3248 | the watchpoint. */ | |
3249 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
25513619 | 3250 | else |
c475f569 RO |
3251 | /* When a hardware watchpoint fires off the PC will be left at |
3252 | the instruction which caused the watchpoint. It will be | |
3253 | necessary for GDB to step over the watchpoint. */ | |
3254 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
25513619 PA |
3255 | } |
3256 | ||
f6ac5f3d PA |
3257 | int |
3258 | procfs_target::remove_watchpoint (CORE_ADDR addr, int len, | |
3259 | enum target_hw_bp_type type, | |
3260 | struct expression *cond) | |
25513619 PA |
3261 | { |
3262 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
3263 | } | |
3264 | ||
f6ac5f3d PA |
3265 | int |
3266 | procfs_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
25513619 PA |
3267 | { |
3268 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
3269 | system can support "thousands" of hardware watchpoints, but gives | |
3270 | no method for finding out how many; It doesn't say anything about | |
3271 | the allowed size for the watched area either. So we just tell | |
3272 | GDB 'yes'. */ | |
3273 | return 1; | |
3274 | } | |
3275 | ||
77382aee PA |
3276 | /* Memory Mappings Functions: */ |
3277 | ||
3278 | /* Call a callback function once for each mapping, passing it the | |
3279 | mapping, an optional secondary callback function, and some optional | |
3280 | opaque data. Quit and return the first non-zero value returned | |
3281 | from the callback. | |
3282 | ||
3283 | PI is the procinfo struct for the process to be mapped. FUNC is | |
3284 | the callback function to be called by this iterator. DATA is the | |
3285 | optional opaque data to be passed to the callback function. | |
3286 | CHILD_FUNC is the optional secondary function pointer to be passed | |
3287 | to the child function. Returns the first non-zero return value | |
3288 | from the callback function, or zero. */ | |
831e682e MS |
3289 | |
3290 | static int | |
b8edc417 | 3291 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 3292 | void *data, |
19958708 | 3293 | int (*func) (struct prmap *map, |
b8edc417 | 3294 | find_memory_region_ftype child_func, |
831e682e MS |
3295 | void *data)) |
3296 | { | |
3297 | char pathname[MAX_PROC_NAME_SIZE]; | |
3298 | struct prmap *prmaps; | |
3299 | struct prmap *prmap; | |
3300 | int funcstat; | |
831e682e | 3301 | int nmap; |
831e682e | 3302 | struct stat sbuf; |
831e682e | 3303 | |
19958708 | 3304 | /* Get the number of mappings, allocate space, |
831e682e | 3305 | and read the mappings into prmaps. */ |
0df8b418 | 3306 | /* Open map fd. */ |
c475f569 | 3307 | xsnprintf (pathname, sizeof (pathname), "/proc/%d/map", pi->pid); |
831e682e | 3308 | |
5dc1a704 TT |
3309 | scoped_fd map_fd (open (pathname, O_RDONLY)); |
3310 | if (map_fd.get () < 0) | |
3311 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
831e682e | 3312 | |
19958708 | 3313 | /* Use stat to determine the file size, and compute |
831e682e | 3314 | the number of prmap_t objects it contains. */ |
5dc1a704 | 3315 | if (fstat (map_fd.get (), &sbuf) != 0) |
831e682e MS |
3316 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); |
3317 | ||
3318 | nmap = sbuf.st_size / sizeof (prmap_t); | |
3319 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5dc1a704 | 3320 | if (read (map_fd.get (), (char *) prmaps, nmap * sizeof (*prmaps)) |
831e682e MS |
3321 | != (nmap * sizeof (*prmaps))) |
3322 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
831e682e MS |
3323 | |
3324 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
c475f569 RO |
3325 | { |
3326 | funcstat = (*func) (prmap, child_func, data); | |
3327 | if (funcstat != 0) | |
3328 | return funcstat; | |
3329 | } | |
831e682e MS |
3330 | |
3331 | return 0; | |
3332 | } | |
3333 | ||
77382aee | 3334 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 3335 | function for each memory region. |
77382aee | 3336 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
3337 | |
3338 | static int | |
19958708 | 3339 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 3340 | find_memory_region_ftype func, void *data) |
be4d1333 | 3341 | { |
bf75638e | 3342 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 3343 | map->pr_size, |
be4d1333 MS |
3344 | (map->pr_mflags & MA_READ) != 0, |
3345 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 3346 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 3347 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
3348 | data); |
3349 | } | |
3350 | ||
77382aee PA |
3351 | /* External interface. Calls a callback function once for each |
3352 | mapped memory region in the child process, passing as arguments: | |
3353 | ||
3354 | CORE_ADDR virtual_address, | |
3355 | unsigned long size, | |
3356 | int read, TRUE if region is readable by the child | |
3357 | int write, TRUE if region is writable by the child | |
3358 | int execute TRUE if region is executable by the child. | |
3359 | ||
3360 | Stops iterating and returns the first non-zero value returned by | |
3361 | the callback. */ | |
be4d1333 | 3362 | |
f6ac5f3d PA |
3363 | int |
3364 | procfs_target::find_memory_regions (find_memory_region_ftype func, void *data) | |
be4d1333 | 3365 | { |
e99b03dc | 3366 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
be4d1333 | 3367 | |
19958708 | 3368 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
3369 | find_memory_regions_callback); |
3370 | } | |
3371 | ||
77382aee | 3372 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 3373 | |
388faa48 | 3374 | static char * |
5ae5f592 | 3375 | mappingflags (long flags) |
388faa48 MS |
3376 | { |
3377 | static char asciiflags[8]; | |
3378 | ||
3379 | strcpy (asciiflags, "-------"); | |
388faa48 MS |
3380 | if (flags & MA_STACK) |
3381 | asciiflags[1] = 's'; | |
3382 | if (flags & MA_BREAK) | |
3383 | asciiflags[2] = 'b'; | |
3384 | if (flags & MA_SHARED) | |
3385 | asciiflags[3] = 's'; | |
3386 | if (flags & MA_READ) | |
3387 | asciiflags[4] = 'r'; | |
3388 | if (flags & MA_WRITE) | |
3389 | asciiflags[5] = 'w'; | |
3390 | if (flags & MA_EXEC) | |
3391 | asciiflags[6] = 'x'; | |
3392 | return (asciiflags); | |
3393 | } | |
3394 | ||
77382aee PA |
3395 | /* Callback function, does the actual work for 'info proc |
3396 | mappings'. */ | |
831e682e | 3397 | |
831e682e | 3398 | static int |
b8edc417 | 3399 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 3400 | void *unused) |
831e682e | 3401 | { |
0b62613e | 3402 | unsigned int pr_off; |
831e682e | 3403 | |
0b62613e | 3404 | pr_off = (unsigned int) map->pr_offset; |
0b62613e | 3405 | |
f5656ead | 3406 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 3407 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
3408 | (unsigned long) map->pr_vaddr, |
3409 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3410 | (unsigned long) map->pr_size, |
0b62613e PA |
3411 | pr_off, |
3412 | mappingflags (map->pr_mflags)); | |
3413 | else | |
f6a96b83 | 3414 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
3415 | (unsigned long) map->pr_vaddr, |
3416 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3417 | (unsigned long) map->pr_size, |
0b62613e PA |
3418 | pr_off, |
3419 | mappingflags (map->pr_mflags)); | |
831e682e MS |
3420 | |
3421 | return 0; | |
3422 | } | |
3423 | ||
77382aee | 3424 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
3425 | |
3426 | static void | |
3427 | info_proc_mappings (procinfo *pi, int summary) | |
3428 | { | |
388faa48 | 3429 | if (summary) |
0df8b418 | 3430 | return; /* No output for summary mode. */ |
388faa48 | 3431 | |
a3f17187 | 3432 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 3433 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
3434 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
3435 | "Start Addr", | |
3436 | " End Addr", | |
3437 | " Size", | |
3438 | " Offset", | |
3439 | "Flags"); | |
3440 | else | |
3441 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3442 | "Start Addr", | |
3443 | " End Addr", | |
3444 | " Size", | |
3445 | " Offset", | |
3446 | "Flags"); | |
388faa48 | 3447 | |
831e682e | 3448 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
3449 | printf_filtered ("\n"); |
3450 | } | |
3451 | ||
77382aee | 3452 | /* Implement the "info proc" command. */ |
c3f6f71d | 3453 | |
f6ac5f3d PA |
3454 | bool |
3455 | procfs_target::info_proc (const char *args, enum info_proc_what what) | |
c906108c | 3456 | { |
388faa48 MS |
3457 | procinfo *process = NULL; |
3458 | procinfo *thread = NULL; | |
388faa48 MS |
3459 | char *tmp = NULL; |
3460 | int pid = 0; | |
3461 | int tid = 0; | |
3462 | int mappings = 0; | |
c906108c | 3463 | |
145b16a9 UW |
3464 | switch (what) |
3465 | { | |
3466 | case IP_MINIMAL: | |
3467 | break; | |
3468 | ||
3469 | case IP_MAPPINGS: | |
3470 | case IP_ALL: | |
3471 | mappings = 1; | |
3472 | break; | |
3473 | ||
3474 | default: | |
3475 | error (_("Not supported on this target.")); | |
3476 | } | |
3477 | ||
773a1edc | 3478 | gdb_argv built_argv (args); |
4fa7574e | 3479 | for (char *arg : built_argv) |
c3f6f71d | 3480 | { |
773a1edc | 3481 | if (isdigit (arg[0])) |
c3f6f71d | 3482 | { |
773a1edc | 3483 | pid = strtoul (arg, &tmp, 10); |
c3f6f71d JM |
3484 | if (*tmp == '/') |
3485 | tid = strtoul (++tmp, NULL, 10); | |
3486 | } | |
773a1edc | 3487 | else if (arg[0] == '/') |
c3f6f71d | 3488 | { |
773a1edc | 3489 | tid = strtoul (arg + 1, NULL, 10); |
c3f6f71d | 3490 | } |
c3f6f71d | 3491 | } |
5b4cbbe3 TT |
3492 | |
3493 | procinfo_up temporary_procinfo; | |
c3f6f71d | 3494 | if (pid == 0) |
e99b03dc | 3495 | pid = inferior_ptid.pid (); |
c3f6f71d | 3496 | if (pid == 0) |
8a3fe4f8 | 3497 | error (_("No current process: you must name one.")); |
c3f6f71d | 3498 | else |
c906108c | 3499 | { |
c3f6f71d | 3500 | /* Have pid, will travel. |
0df8b418 | 3501 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
3502 | process = find_procinfo (pid, 0); |
3503 | if (process == NULL) | |
3504 | { | |
19958708 | 3505 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
3506 | remember to close it again when finished. */ |
3507 | process = create_procinfo (pid, 0); | |
5b4cbbe3 | 3508 | temporary_procinfo.reset (process); |
c3f6f71d JM |
3509 | if (!open_procinfo_files (process, FD_CTL)) |
3510 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
3511 | } | |
c906108c | 3512 | } |
c3f6f71d JM |
3513 | if (tid != 0) |
3514 | thread = create_procinfo (pid, tid); | |
3515 | ||
3516 | if (process) | |
3517 | { | |
a3f17187 | 3518 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
3519 | proc_prettyprint_flags (proc_flags (process), 1); |
3520 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
3521 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
3522 | if (proc_get_nthreads (process) > 1) | |
19958708 | 3523 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
3524 | proc_get_nthreads (process)); |
3525 | } | |
3526 | if (thread) | |
3527 | { | |
a3f17187 | 3528 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
3529 | proc_prettyprint_flags (proc_flags (thread), 1); |
3530 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
3531 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
3532 | } | |
3533 | ||
388faa48 | 3534 | if (mappings) |
c475f569 | 3535 | info_proc_mappings (process, 0); |
388faa48 | 3536 | |
f6ac5f3d | 3537 | return true; |
c906108c SS |
3538 | } |
3539 | ||
9185ddce JB |
3540 | /* Modify the status of the system call identified by SYSCALLNUM in |
3541 | the set of syscalls that are currently traced/debugged. | |
3542 | ||
3543 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 3544 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 3545 | |
0df8b418 | 3546 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
3547 | will be disabled. */ |
3548 | ||
3549 | static void | |
3550 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 3551 | int mode, int from_tty) |
9185ddce JB |
3552 | { |
3553 | sysset_t *sysset; | |
77382aee | 3554 | |
9185ddce JB |
3555 | if (entry_or_exit == PR_SYSENTRY) |
3556 | sysset = proc_get_traced_sysentry (pi, NULL); | |
3557 | else | |
3558 | sysset = proc_get_traced_sysexit (pi, NULL); | |
3559 | ||
3560 | if (sysset == NULL) | |
3561 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
3562 | ||
3563 | if (mode == FLAG_SET) | |
44122162 | 3564 | praddset (sysset, syscallnum); |
9185ddce | 3565 | else |
44122162 | 3566 | prdelset (sysset, syscallnum); |
9185ddce JB |
3567 | |
3568 | if (entry_or_exit == PR_SYSENTRY) | |
3569 | { | |
3570 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 3571 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
3572 | } |
3573 | else | |
3574 | { | |
3575 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 3576 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
3577 | } |
3578 | } | |
3579 | ||
c3f6f71d | 3580 | static void |
0b39b52e | 3581 | proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 3582 | { |
c3f6f71d | 3583 | procinfo *pi; |
c906108c | 3584 | |
e99b03dc | 3585 | if (inferior_ptid.pid () <= 0) |
8a3fe4f8 | 3586 | error (_("you must be debugging a process to use this command.")); |
c906108c | 3587 | |
c3f6f71d | 3588 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 3589 | error_no_arg (_("system call to trace")); |
c3f6f71d | 3590 | |
e99b03dc | 3591 | pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
c3f6f71d JM |
3592 | if (isdigit (args[0])) |
3593 | { | |
9185ddce | 3594 | const int syscallnum = atoi (args); |
c906108c | 3595 | |
9185ddce | 3596 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
3597 | } |
3598 | } | |
3599 | ||
19958708 | 3600 | static void |
0b39b52e | 3601 | proc_trace_sysentry_cmd (const char *args, int from_tty) |
c906108c | 3602 | { |
c3f6f71d JM |
3603 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
3604 | } | |
c906108c | 3605 | |
19958708 | 3606 | static void |
0b39b52e | 3607 | proc_trace_sysexit_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3608 | { |
3609 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 3610 | } |
c906108c | 3611 | |
19958708 | 3612 | static void |
0b39b52e | 3613 | proc_untrace_sysentry_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3614 | { |
3615 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
3616 | } | |
3617 | ||
19958708 | 3618 | static void |
0b39b52e | 3619 | proc_untrace_sysexit_cmd (const char *args, int from_tty) |
c906108c | 3620 | { |
c3f6f71d JM |
3621 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
3622 | } | |
c906108c | 3623 | |
6c265988 | 3624 | void _initialize_procfs (); |
c906108c | 3625 | void |
6c265988 | 3626 | _initialize_procfs () |
c906108c | 3627 | { |
76727919 | 3628 | gdb::observers::inferior_created.attach (procfs_inferior_created); |
27087a3d | 3629 | |
19958708 | 3630 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 3631 | _("Give a trace of entries into the syscall.")); |
19958708 | 3632 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 3633 | _("Give a trace of exits from the syscall.")); |
19958708 | 3634 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 3635 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 3636 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 3637 | _("Cancel a trace of exits from the syscall.")); |
c1955e17 | 3638 | |
62c808ae | 3639 | add_inf_child_target (&the_procfs_target); |
c3f6f71d JM |
3640 | } |
3641 | ||
3642 | /* =================== END, GDB "MODULE" =================== */ | |
3643 | ||
3644 | ||
3645 | ||
77382aee PA |
3646 | /* miscellaneous stubs: */ |
3647 | ||
3648 | /* The following satisfy a few random symbols mostly created by the | |
3649 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 3650 | |
77382aee PA |
3651 | /* Return a pid for which we guarantee we will be able to find a |
3652 | 'live' procinfo. */ | |
c3f6f71d | 3653 | |
39f77062 | 3654 | ptid_t |
fba45db2 | 3655 | procfs_first_available (void) |
c3f6f71d | 3656 | { |
f2907e49 | 3657 | return ptid_t (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 3658 | } |
be4d1333 MS |
3659 | |
3660 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
3661 | ||
3662 | static char * | |
19958708 | 3663 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 3664 | char *note_data, int *note_size, |
2ea28649 | 3665 | enum gdb_signal stop_signal) |
be4d1333 | 3666 | { |
5b6d1e4f | 3667 | struct regcache *regcache = get_thread_regcache (&the_procfs_target, ptid); |
be4d1333 MS |
3668 | gdb_gregset_t gregs; |
3669 | gdb_fpregset_t fpregs; | |
3670 | unsigned long merged_pid; | |
3671 | ||
e38504b3 | 3672 | merged_pid = ptid.lwp () << 16 | ptid.pid (); |
be4d1333 | 3673 | |
75125405 DJ |
3674 | /* This part is the old method for fetching registers. |
3675 | It should be replaced by the newer one using regsets | |
3676 | once it is implemented in this platform: | |
29082443 | 3677 | gdbarch_iterate_over_regset_sections(). */ |
75125405 | 3678 | |
75125405 DJ |
3679 | target_fetch_registers (regcache, -1); |
3680 | ||
594f7785 | 3681 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
3682 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
3683 | note_data, | |
3684 | note_size, | |
19958708 | 3685 | merged_pid, |
65554fef MS |
3686 | stop_signal, |
3687 | &gregs); | |
594f7785 | 3688 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
3689 | note_data = (char *) elfcore_write_prfpreg (obfd, |
3690 | note_data, | |
3691 | note_size, | |
3692 | &fpregs, | |
3693 | sizeof (fpregs)); | |
75125405 | 3694 | |
be4d1333 MS |
3695 | return note_data; |
3696 | } | |
3697 | ||
3698 | struct procfs_corefile_thread_data { | |
3699 | bfd *obfd; | |
3700 | char *note_data; | |
3701 | int *note_size; | |
2ea28649 | 3702 | enum gdb_signal stop_signal; |
be4d1333 MS |
3703 | }; |
3704 | ||
3705 | static int | |
65554fef | 3706 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 | 3707 | { |
b196bc4c RO |
3708 | struct procfs_corefile_thread_data *args |
3709 | = (struct procfs_corefile_thread_data *) data; | |
be4d1333 | 3710 | |
2689673f | 3711 | if (pi != NULL) |
be4d1333 | 3712 | { |
fd79271b | 3713 | ptid_t ptid = ptid_t (pi->pid, thread->tid, 0); |
f4a14ae6 | 3714 | |
75125405 | 3715 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 3716 | args->note_data, |
2020b7ab PA |
3717 | args->note_size, |
3718 | args->stop_signal); | |
be4d1333 MS |
3719 | } |
3720 | return 0; | |
3721 | } | |
3722 | ||
a223f1e7 JB |
3723 | static int |
3724 | find_signalled_thread (struct thread_info *info, void *data) | |
3725 | { | |
a493e3e2 | 3726 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
e99b03dc | 3727 | && info->ptid.pid () == inferior_ptid.pid ()) |
a223f1e7 JB |
3728 | return 1; |
3729 | ||
3730 | return 0; | |
3731 | } | |
3732 | ||
2ea28649 | 3733 | static enum gdb_signal |
a223f1e7 JB |
3734 | find_stop_signal (void) |
3735 | { | |
3736 | struct thread_info *info = | |
3737 | iterate_over_threads (find_signalled_thread, NULL); | |
3738 | ||
3739 | if (info) | |
16c381f0 | 3740 | return info->suspend.stop_signal; |
a223f1e7 | 3741 | else |
a493e3e2 | 3742 | return GDB_SIGNAL_0; |
a223f1e7 JB |
3743 | } |
3744 | ||
f6ac5f3d PA |
3745 | char * |
3746 | procfs_target::make_corefile_notes (bfd *obfd, int *note_size) | |
be4d1333 | 3747 | { |
be4d1333 | 3748 | gdb_gregset_t gregs; |
be4d1333 MS |
3749 | char fname[16] = {'\0'}; |
3750 | char psargs[80] = {'\0'}; | |
e99b03dc | 3751 | procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0); |
be4d1333 | 3752 | char *note_data = NULL; |
cbaaa0ca | 3753 | const char *inf_args; |
be4d1333 | 3754 | struct procfs_corefile_thread_data thread_args; |
2ea28649 | 3755 | enum gdb_signal stop_signal; |
be4d1333 MS |
3756 | |
3757 | if (get_exec_file (0)) | |
3758 | { | |
9f37bbcc | 3759 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
3760 | fname[sizeof (fname) - 1] = 0; |
3761 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
3762 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
3763 | |
3764 | inf_args = get_inferior_args (); | |
c475f569 RO |
3765 | if (inf_args && *inf_args |
3766 | && (strlen (inf_args) | |
3767 | < ((int) sizeof (psargs) - (int) strlen (psargs)))) | |
be4d1333 | 3768 | { |
19958708 | 3769 | strncat (psargs, " ", |
be4d1333 | 3770 | sizeof (psargs) - strlen (psargs)); |
19958708 | 3771 | strncat (psargs, inf_args, |
be4d1333 MS |
3772 | sizeof (psargs) - strlen (psargs)); |
3773 | } | |
3774 | } | |
3775 | ||
19958708 RM |
3776 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
3777 | note_data, | |
3778 | note_size, | |
3779 | fname, | |
be4d1333 MS |
3780 | psargs); |
3781 | ||
651c8d2d PA |
3782 | stop_signal = find_stop_signal (); |
3783 | ||
3e3420f6 PA |
3784 | fill_gregset (get_current_regcache (), &gregs, -1); |
3785 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
e99b03dc | 3786 | inferior_ptid.pid (), |
3e3420f6 | 3787 | stop_signal, &gregs); |
3e3420f6 | 3788 | |
be4d1333 MS |
3789 | thread_args.obfd = obfd; |
3790 | thread_args.note_data = note_data; | |
3791 | thread_args.note_size = note_size; | |
651c8d2d | 3792 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
3793 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
3794 | &thread_args); | |
2689673f | 3795 | note_data = thread_args.note_data; |
be4d1333 | 3796 | |
62c808ae RO |
3797 | gdb::optional<gdb::byte_vector> auxv = |
3798 | target_read_alloc (current_top_target (), TARGET_OBJECT_AUXV, NULL); | |
3799 | if (auxv && !auxv->empty ()) | |
3800 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
3801 | "CORE", NT_AUXV, auxv->data (), | |
3802 | auxv->size ()); | |
4e73f23d | 3803 | |
be4d1333 MS |
3804 | return note_data; |
3805 | } | |
be4d1333 | 3806 | /* =================== END GCORE .NOTE "MODULE" =================== */ |