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44122162 | 1 | /* Machine independent support for Solaris /proc (process file system) for GDB. |
2555fe1a | 2 | |
e2882c85 | 3 | Copyright (C) 1999-2018 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
45741a9c | 25 | #include "infrun.h" |
c3f6f71d JM |
26 | #include "target.h" |
27 | #include "gdbcore.h" | |
65554fef | 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 29 | #include "gdbcmd.h" |
0fda6bd2 | 30 | #include "gdbthread.h" |
7f7fe91e | 31 | #include "regcache.h" |
28439f5e | 32 | #include "inf-child.h" |
4fa7574e | 33 | #include "nat/fork-inferior.h" |
88fc5eb7 | 34 | #include "filestuff.h" |
c906108c | 35 | |
0df8b418 | 36 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c906108c | 37 | |
c3f6f71d JM |
38 | #include <sys/procfs.h> |
39 | #include <sys/fault.h> | |
40 | #include <sys/syscall.h> | |
2555fe1a | 41 | #include "gdb_wait.h" |
0fda6bd2 JM |
42 | #include <signal.h> |
43 | #include <ctype.h> | |
92107356 | 44 | #include "gdb_bfd.h" |
44270758 | 45 | #include "inflow.h" |
4e73f23d | 46 | #include "auxv.h" |
d1a7880c | 47 | #include "procfs.h" |
76727919 | 48 | #include "observable.h" |
5dc1a704 | 49 | #include "common/scoped_fd.h" |
0fda6bd2 | 50 | |
77382aee PA |
51 | /* This module provides the interface between GDB and the |
52 | /proc file system, which is used on many versions of Unix | |
53 | as a means for debuggers to control other processes. | |
54 | ||
77382aee PA |
55 | /proc works by imitating a file system: you open a simulated file |
56 | that represents the process you wish to interact with, and perform | |
57 | operations on that "file" in order to examine or change the state | |
58 | of the other process. | |
59 | ||
60 | The most important thing to know about /proc and this module is | |
61 | that there are two very different interfaces to /proc: | |
62 | ||
63 | One that uses the ioctl system call, and another that uses read | |
64 | and write system calls. | |
65 | ||
44122162 RO |
66 | This module supports only the Solaris version of the read/write |
67 | interface. */ | |
77382aee | 68 | |
c906108c | 69 | #include <sys/types.h> |
2978b111 | 70 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
c906108c | 71 | |
c3f6f71d JM |
72 | #include <fcntl.h> /* for O_RDONLY */ |
73 | #include <unistd.h> /* for "X_OK" */ | |
53ce3c39 | 74 | #include <sys/stat.h> /* for struct stat */ |
c906108c | 75 | |
103b3ef5 MS |
76 | /* Note: procfs-utils.h must be included after the above system header |
77 | files, because it redefines various system calls using macros. | |
78 | This may be incompatible with the prototype declarations. */ | |
79 | ||
103b3ef5 MS |
80 | #include "proc-utils.h" |
81 | ||
77382aee | 82 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
83 | #include "gregset.h" |
84 | ||
c3f6f71d | 85 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 86 | |
77382aee | 87 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 88 | |
f6ac5f3d | 89 | |
e96027e0 PA |
90 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
91 | const gdb_byte *, | |
92 | ULONGEST, ULONGEST, | |
93 | ULONGEST *); | |
a14ed312 | 94 | |
f6ac5f3d PA |
95 | class procfs_target final : public inf_child_target |
96 | { | |
97 | public: | |
98 | void create_inferior (const char *, const std::string &, | |
99 | char **, int) override; | |
100 | ||
101 | void kill () override; | |
102 | ||
103 | void mourn_inferior () override; | |
104 | ||
105 | void attach (const char *, int) override; | |
106 | void detach (inferior *inf, int) override; | |
107 | ||
108 | void resume (ptid_t, int, enum gdb_signal) override; | |
109 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
110 | ||
111 | void fetch_registers (struct regcache *, int) override; | |
112 | void store_registers (struct regcache *, int) override; | |
113 | ||
114 | enum target_xfer_status xfer_partial (enum target_object object, | |
115 | const char *annex, | |
116 | gdb_byte *readbuf, | |
117 | const gdb_byte *writebuf, | |
118 | ULONGEST offset, ULONGEST len, | |
119 | ULONGEST *xfered_len) override; | |
120 | ||
121 | void pass_signals (int, unsigned char *) override; | |
a14ed312 | 122 | |
f6ac5f3d | 123 | void files_info () override; |
c3f6f71d | 124 | |
f6ac5f3d | 125 | void update_thread_list () override; |
be4d1333 | 126 | |
f6ac5f3d | 127 | int thread_alive (ptid_t ptid) override; |
be4d1333 | 128 | |
f6ac5f3d | 129 | const char *pid_to_str (ptid_t) override; |
1e03ad20 | 130 | |
f6ac5f3d PA |
131 | thread_control_capabilities get_thread_control_capabilities () override |
132 | { return tc_schedlock; } | |
145b16a9 | 133 | |
f6ac5f3d PA |
134 | /* find_memory_regions support method for gcore */ |
135 | int find_memory_regions (find_memory_region_ftype func, void *data) | |
136 | override; | |
b5c8fcb1 | 137 | |
f6ac5f3d | 138 | char *make_corefile_notes (bfd *, int *) override; |
b5c8fcb1 | 139 | |
f6ac5f3d PA |
140 | bool info_proc (const char *, enum info_proc_what) override; |
141 | ||
142 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
143 | int auxv_parse (gdb_byte **readptr, | |
144 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
145 | override; | |
146 | #endif | |
147 | ||
148 | int stopped_by_watchpoint () override; | |
149 | ||
150 | int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
151 | struct expression *) override; | |
152 | ||
153 | int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
154 | struct expression *) override; | |
155 | ||
156 | int region_ok_for_hw_watchpoint (CORE_ADDR, int) override; | |
157 | ||
158 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
159 | int stopped_data_address (CORE_ADDR *) override; | |
160 | }; | |
b5c8fcb1 | 161 | |
f6ac5f3d | 162 | static procfs_target the_procfs_target; |
b5c8fcb1 | 163 | |
c47ffbe3 | 164 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
165 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
166 | is presented in 64-bit format. We need to provide a custom parser | |
167 | to handle that. */ | |
f6ac5f3d PA |
168 | int |
169 | procfs_target::auxv_parse (gdb_byte **readptr, | |
170 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
c47ffbe3 | 171 | { |
f5656ead | 172 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
173 | gdb_byte *ptr = *readptr; |
174 | ||
175 | if (endptr == ptr) | |
176 | return 0; | |
77382aee | 177 | |
c47ffbe3 VP |
178 | if (endptr - ptr < 8 * 2) |
179 | return -1; | |
180 | ||
e17a4113 | 181 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
182 | ptr += 8; |
183 | /* The size of data is always 64-bit. If the application is 32-bit, | |
184 | it will be zero extended, as expected. */ | |
e17a4113 | 185 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
186 | ptr += 8; |
187 | ||
188 | *readptr = ptr; | |
189 | return 1; | |
190 | } | |
191 | #endif | |
192 | ||
c3f6f71d JM |
193 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
194 | ||
77382aee PA |
195 | /* World Unification: |
196 | ||
197 | Put any typedefs, defines etc. here that are required for the | |
198 | unification of code that handles different versions of /proc. */ | |
c3f6f71d | 199 | |
44122162 RO |
200 | enum { READ_WATCHFLAG = WA_READ, |
201 | WRITE_WATCHFLAG = WA_WRITE, | |
202 | EXEC_WATCHFLAG = WA_EXEC, | |
203 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
204 | }; | |
c3f6f71d JM |
205 | |
206 | ||
207 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
208 | ||
209 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
210 | ||
211 | /* The procinfo struct is a wrapper to hold all the state information | |
212 | concerning a /proc process. There should be exactly one procinfo | |
213 | for each process, and since GDB currently can debug only one | |
214 | process at a time, that means there should be only one procinfo. | |
215 | All of the LWP's of a process can be accessed indirectly thru the | |
216 | single process procinfo. | |
217 | ||
218 | However, against the day when GDB may debug more than one process, | |
219 | this data structure is kept in a list (which for now will hold no | |
220 | more than one member), and many functions will have a pointer to a | |
221 | procinfo as an argument. | |
222 | ||
223 | There will be a separate procinfo structure for use by the (not yet | |
224 | implemented) "info proc" command, so that we can print useful | |
225 | information about any random process without interfering with the | |
0df8b418 | 226 | inferior's procinfo information. */ |
c3f6f71d | 227 | |
c3f6f71d | 228 | /* format strings for /proc paths */ |
44122162 RO |
229 | #define MAIN_PROC_NAME_FMT "/proc/%d" |
230 | #define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
231 | #define AS_PROC_NAME_FMT "/proc/%d/as" | |
232 | #define MAP_PROC_NAME_FMT "/proc/%d/map" | |
233 | #define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
234 | #define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
c906108c | 235 | |
c3f6f71d JM |
236 | typedef struct procinfo { |
237 | struct procinfo *next; | |
238 | int pid; /* Process ID */ | |
239 | int tid; /* Thread/LWP id */ | |
c906108c | 240 | |
c3f6f71d JM |
241 | /* process state */ |
242 | int was_stopped; | |
243 | int ignore_next_sigstop; | |
c906108c | 244 | |
c3f6f71d | 245 | int ctl_fd; /* File descriptor for /proc control file */ |
c3f6f71d JM |
246 | int status_fd; /* File descriptor for /proc status file */ |
247 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 248 | |
c3f6f71d | 249 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 250 | |
c3f6f71d | 251 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
44122162 RO |
252 | sigset_t saved_sigset; /* Saved traced signal set */ |
253 | sigset_t saved_sighold; /* Saved held signal set */ | |
37de36c6 KB |
254 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
255 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 256 | |
44122162 | 257 | pstatus_t prstatus; /* Current process status info */ |
19958708 | 258 | |
c3f6f71d | 259 | struct procinfo *thread_list; |
c906108c | 260 | |
c3f6f71d JM |
261 | int status_valid : 1; |
262 | int gregs_valid : 1; | |
263 | int fpregs_valid : 1; | |
264 | int threads_valid: 1; | |
265 | } procinfo; | |
c906108c | 266 | |
c3f6f71d | 267 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 268 | |
c3f6f71d | 269 | /* Function prototypes for procinfo module: */ |
c906108c | 270 | |
a14ed312 KB |
271 | static procinfo *find_procinfo_or_die (int pid, int tid); |
272 | static procinfo *find_procinfo (int pid, int tid); | |
273 | static procinfo *create_procinfo (int pid, int tid); | |
44122162 | 274 | static void destroy_procinfo (procinfo *p); |
004527cb | 275 | static void do_destroy_procinfo_cleanup (void *); |
44122162 RO |
276 | static void dead_procinfo (procinfo *p, const char *msg, int killp); |
277 | static int open_procinfo_files (procinfo *p, int which); | |
278 | static void close_procinfo_files (procinfo *p); | |
279 | static sysset_t *sysset_t_alloc (procinfo *pi); | |
c906108c | 280 | |
e9ef4f39 | 281 | static int iterate_over_mappings |
b8edc417 JK |
282 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
283 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 284 | void *data)); |
e9ef4f39 | 285 | |
c3f6f71d | 286 | /* The head of the procinfo list: */ |
44122162 | 287 | static procinfo *procinfo_list; |
c906108c | 288 | |
77382aee PA |
289 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
290 | not found. */ | |
c906108c | 291 | |
19958708 | 292 | static procinfo * |
fba45db2 | 293 | find_procinfo (int pid, int tid) |
c5aa993b | 294 | { |
c3f6f71d | 295 | procinfo *pi; |
c906108c | 296 | |
c3f6f71d JM |
297 | for (pi = procinfo_list; pi; pi = pi->next) |
298 | if (pi->pid == pid) | |
299 | break; | |
c906108c | 300 | |
c3f6f71d JM |
301 | if (pi) |
302 | if (tid) | |
303 | { | |
304 | /* Don't check threads_valid. If we're updating the | |
305 | thread_list, we want to find whatever threads are already | |
306 | here. This means that in general it is the caller's | |
307 | responsibility to check threads_valid and update before | |
308 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 309 | thread. */ |
c3f6f71d JM |
310 | |
311 | for (pi = pi->thread_list; pi; pi = pi->next) | |
312 | if (pi->tid == tid) | |
313 | break; | |
314 | } | |
c906108c | 315 | |
c3f6f71d JM |
316 | return pi; |
317 | } | |
c906108c | 318 | |
77382aee | 319 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 320 | |
c3f6f71d | 321 | static procinfo * |
fba45db2 | 322 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
323 | { |
324 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 325 | |
c3f6f71d | 326 | if (pi == NULL) |
0fda6bd2 JM |
327 | { |
328 | if (tid) | |
3e43a32a MS |
329 | error (_("procfs: couldn't find pid %d " |
330 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
331 | pid, tid); |
332 | else | |
8a3fe4f8 | 333 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 334 | } |
c3f6f71d JM |
335 | return pi; |
336 | } | |
c906108c | 337 | |
77382aee PA |
338 | /* Wrapper for `open'. The appropriate open call is attempted; if |
339 | unsuccessful, it will be retried as many times as needed for the | |
340 | EAGAIN and EINTR conditions. | |
19958708 | 341 | |
77382aee PA |
342 | For other conditions, retry the open a limited number of times. In |
343 | addition, a short sleep is imposed prior to retrying the open. The | |
344 | reason for this sleep is to give the kernel a chance to catch up | |
345 | and create the file in question in the event that GDB "wins" the | |
346 | race to open a file before the kernel has created it. */ | |
19958708 | 347 | |
4d1bcd09 KB |
348 | static int |
349 | open_with_retry (const char *pathname, int flags) | |
350 | { | |
351 | int retries_remaining, status; | |
352 | ||
353 | retries_remaining = 2; | |
354 | ||
355 | while (1) | |
356 | { | |
357 | status = open (pathname, flags); | |
358 | ||
359 | if (status >= 0 || retries_remaining == 0) | |
360 | break; | |
361 | else if (errno != EINTR && errno != EAGAIN) | |
362 | { | |
363 | retries_remaining--; | |
364 | sleep (1); | |
365 | } | |
366 | } | |
367 | ||
368 | return status; | |
369 | } | |
370 | ||
44122162 RO |
371 | /* Open the file descriptor for the process or LWP. We only open the |
372 | control file descriptor; the others are opened lazily as needed. | |
77382aee | 373 | Returns the file descriptor, or zero for failure. */ |
c906108c | 374 | |
c3f6f71d | 375 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 376 | |
c3f6f71d | 377 | static int |
fba45db2 | 378 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d JM |
379 | { |
380 | char tmp[MAX_PROC_NAME_SIZE]; | |
381 | int fd; | |
382 | ||
77382aee PA |
383 | /* This function is getting ALMOST long enough to break up into |
384 | several. Here is some rationale: | |
385 | ||
77382aee PA |
386 | There are several file descriptors that may need to be open |
387 | for any given process or LWP. The ones we're intereted in are: | |
388 | - control (ctl) write-only change the state | |
389 | - status (status) read-only query the state | |
390 | - address space (as) read/write access memory | |
391 | - map (map) read-only virtual addr map | |
392 | Most of these are opened lazily as they are needed. | |
393 | The pathnames for the 'files' for an LWP look slightly | |
394 | different from those of a first-class process: | |
395 | Pathnames for a process (<proc-id>): | |
396 | /proc/<proc-id>/ctl | |
397 | /proc/<proc-id>/status | |
398 | /proc/<proc-id>/as | |
399 | /proc/<proc-id>/map | |
400 | Pathnames for an LWP (lwp-id): | |
401 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
402 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
403 | An LWP has no map or address space file descriptor, since | |
44122162 RO |
404 | the memory map and address space are shared by all LWPs. */ |
405 | ||
77382aee PA |
406 | /* In this case, there are several different file descriptors that |
407 | we might be asked to open. The control file descriptor will be | |
408 | opened early, but the others will be opened lazily as they are | |
409 | needed. */ | |
c3f6f71d JM |
410 | |
411 | strcpy (tmp, pi->pathname); | |
0df8b418 | 412 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
413 | case FD_CTL: |
414 | if (pi->tid) | |
415 | strcat (tmp, "/lwpctl"); | |
416 | else | |
417 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 418 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 419 | if (fd < 0) |
c3f6f71d JM |
420 | return 0; /* fail */ |
421 | pi->ctl_fd = fd; | |
422 | break; | |
423 | case FD_AS: | |
424 | if (pi->tid) | |
0df8b418 | 425 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 426 | strcat (tmp, "/as"); |
4d1bcd09 | 427 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 428 | if (fd < 0) |
c3f6f71d JM |
429 | return 0; /* fail */ |
430 | pi->as_fd = fd; | |
431 | break; | |
432 | case FD_STATUS: | |
433 | if (pi->tid) | |
434 | strcat (tmp, "/lwpstatus"); | |
435 | else | |
436 | strcat (tmp, "/status"); | |
4d1bcd09 | 437 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 438 | if (fd < 0) |
c3f6f71d JM |
439 | return 0; /* fail */ |
440 | pi->status_fd = fd; | |
441 | break; | |
442 | default: | |
443 | return 0; /* unknown file descriptor */ | |
444 | } | |
c906108c | 445 | |
c3f6f71d JM |
446 | return 1; /* success */ |
447 | } | |
c906108c | 448 | |
77382aee PA |
449 | /* Allocate a data structure and link it into the procinfo list. |
450 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
451 | pointer to new procinfo struct. */ | |
c906108c | 452 | |
c3f6f71d | 453 | static procinfo * |
fba45db2 | 454 | create_procinfo (int pid, int tid) |
c3f6f71d | 455 | { |
0b62613e | 456 | procinfo *pi, *parent = NULL; |
c906108c | 457 | |
0d06e24b | 458 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 459 | return pi; /* Already exists, nothing to do. */ |
c906108c | 460 | |
0df8b418 | 461 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
462 | if (tid != 0) |
463 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
464 | create it if it | |
0df8b418 | 465 | doesn't exist yet? */ |
c906108c | 466 | |
8d749320 | 467 | pi = XNEW (procinfo); |
c3f6f71d JM |
468 | memset (pi, 0, sizeof (procinfo)); |
469 | pi->pid = pid; | |
470 | pi->tid = tid; | |
c906108c | 471 | |
1d5e0602 KB |
472 | pi->saved_entryset = sysset_t_alloc (pi); |
473 | pi->saved_exitset = sysset_t_alloc (pi); | |
474 | ||
c3f6f71d JM |
475 | /* Chain into list. */ |
476 | if (tid == 0) | |
477 | { | |
478 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
479 | pi->next = procinfo_list; | |
480 | procinfo_list = pi; | |
481 | } | |
482 | else | |
483 | { | |
c3f6f71d | 484 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); |
c3f6f71d JM |
485 | pi->next = parent->thread_list; |
486 | parent->thread_list = pi; | |
487 | } | |
488 | return pi; | |
489 | } | |
c906108c | 490 | |
77382aee | 491 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 492 | |
c3f6f71d | 493 | static void |
fba45db2 | 494 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
495 | { |
496 | if (pi->ctl_fd > 0) | |
497 | close (pi->ctl_fd); | |
c3f6f71d JM |
498 | if (pi->as_fd > 0) |
499 | close (pi->as_fd); | |
500 | if (pi->status_fd > 0) | |
501 | close (pi->status_fd); | |
c3f6f71d JM |
502 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
503 | } | |
c906108c | 504 | |
77382aee | 505 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 506 | |
c3f6f71d | 507 | static void |
fba45db2 | 508 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
509 | { |
510 | procinfo *ptr; | |
511 | ||
77382aee | 512 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
513 | if (pi == *list) |
514 | *list = pi->next; | |
19958708 | 515 | else |
c3f6f71d JM |
516 | for (ptr = *list; ptr; ptr = ptr->next) |
517 | if (ptr->next == pi) | |
518 | { | |
519 | ptr->next = pi->next; | |
520 | break; | |
521 | } | |
7a292a7a | 522 | |
77382aee | 523 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 524 | close_procinfo_files (pi); |
7a292a7a | 525 | |
77382aee | 526 | /* Step three: free the memory. */ |
1d5e0602 KB |
527 | xfree (pi->saved_entryset); |
528 | xfree (pi->saved_exitset); | |
b8c9b27d | 529 | xfree (pi); |
c3f6f71d | 530 | } |
c906108c | 531 | |
c3f6f71d | 532 | static void |
fba45db2 | 533 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
534 | { |
535 | procinfo *tmp; | |
c906108c | 536 | |
0df8b418 | 537 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 538 | { |
0df8b418 | 539 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
540 | destroy_one_procinfo (&tmp->thread_list, pi); |
541 | } | |
0df8b418 | 542 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
543 | { |
544 | /* First destroy the children, if any; */ | |
545 | while (pi->thread_list != NULL) | |
546 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
547 | /* Then destroy the parent. Genocide!!! */ | |
548 | destroy_one_procinfo (&procinfo_list, pi); | |
549 | } | |
550 | } | |
c906108c | 551 | |
004527cb AC |
552 | static void |
553 | do_destroy_procinfo_cleanup (void *pi) | |
554 | { | |
b196bc4c | 555 | destroy_procinfo ((procinfo *) pi); |
004527cb AC |
556 | } |
557 | ||
c3f6f71d | 558 | enum { NOKILL, KILL }; |
c906108c | 559 | |
77382aee PA |
560 | /* To be called on a non_recoverable error for a procinfo. Prints |
561 | error messages, optionally sends a SIGKILL to the process, then | |
562 | destroys the data structure. */ | |
c906108c | 563 | |
c3f6f71d | 564 | static void |
995816ba | 565 | dead_procinfo (procinfo *pi, const char *msg, int kill_p) |
c3f6f71d JM |
566 | { |
567 | char procfile[80]; | |
c906108c | 568 | |
c3f6f71d JM |
569 | if (pi->pathname) |
570 | { | |
571 | print_sys_errmsg (pi->pathname, errno); | |
572 | } | |
573 | else | |
574 | { | |
575 | sprintf (procfile, "process %d", pi->pid); | |
576 | print_sys_errmsg (procfile, errno); | |
577 | } | |
578 | if (kill_p == KILL) | |
579 | kill (pi->pid, SIGKILL); | |
c906108c | 580 | |
c3f6f71d | 581 | destroy_procinfo (pi); |
0b62613e | 582 | error ("%s", msg); |
c3f6f71d | 583 | } |
c906108c | 584 | |
77382aee | 585 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
586 | |
587 | static sysset_t * | |
44122162 | 588 | sysset_t_alloc (procinfo *pi) |
37de36c6 | 589 | { |
44122162 | 590 | return (sysset_t *) xmalloc (sizeof (sysset_t)); |
37de36c6 KB |
591 | } |
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 JM |
619 | { |
620 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
621 | print_sys_errmsg (errmsg, errno); | |
622 | } | |
c906108c | 623 | |
d3581e61 | 624 | static void |
995816ba | 625 | proc_error (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
626 | { |
627 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
628 | perror_with_name (errmsg); | |
629 | } | |
c906108c | 630 | |
77382aee PA |
631 | /* Updates the status struct in the procinfo. There is a 'valid' |
632 | flag, to let other functions know when this function needs to be | |
633 | called (so the status is only read when it is needed). The status | |
634 | file descriptor is also only opened when it is needed. Returns | |
635 | non-zero for success, zero for failure. */ | |
c906108c | 636 | |
d3581e61 | 637 | static int |
fba45db2 | 638 | proc_get_status (procinfo *pi) |
c3f6f71d | 639 | { |
0df8b418 | 640 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
641 | if (pi->status_fd == 0 && |
642 | open_procinfo_files (pi, FD_STATUS) == 0) | |
643 | { | |
644 | pi->status_valid = 0; | |
645 | return 0; | |
646 | } | |
c906108c | 647 | |
c3f6f71d JM |
648 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
649 | pi->status_valid = 0; /* fail */ | |
650 | else | |
651 | { | |
19958708 | 652 | /* Sigh... I have to read a different data structure, |
0df8b418 | 653 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 654 | if (pi->tid) |
19958708 RM |
655 | pi->status_valid = (read (pi->status_fd, |
656 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
657 | sizeof (lwpstatus_t)) |
658 | == sizeof (lwpstatus_t)); | |
659 | else | |
660 | { | |
19958708 | 661 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d | 662 | (char *) &pi->prstatus, |
44122162 RO |
663 | sizeof (pstatus_t)) |
664 | == sizeof (pstatus_t)); | |
c3f6f71d JM |
665 | } |
666 | } | |
c906108c | 667 | |
c3f6f71d JM |
668 | if (pi->status_valid) |
669 | { | |
19958708 | 670 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 671 | proc_why (pi), |
19958708 | 672 | proc_what (pi), |
c3f6f71d JM |
673 | proc_get_current_thread (pi)); |
674 | } | |
c906108c | 675 | |
77382aee | 676 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d | 677 | pi->gregs_valid = pi->status_valid; |
77382aee PA |
678 | /* In the read/write multiple-fd model, the status struct includes |
679 | the fp regs too, so mark them valid too. */ | |
c3f6f71d | 680 | pi->fpregs_valid = pi->status_valid; |
77382aee | 681 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 682 | } |
c906108c | 683 | |
77382aee | 684 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 685 | |
d3581e61 | 686 | static long |
fba45db2 | 687 | proc_flags (procinfo *pi) |
c3f6f71d JM |
688 | { |
689 | if (!pi->status_valid) | |
690 | if (!proc_get_status (pi)) | |
0df8b418 | 691 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 692 | |
c3f6f71d | 693 | return pi->prstatus.pr_lwp.pr_flags; |
c3f6f71d | 694 | } |
c906108c | 695 | |
77382aee | 696 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 697 | |
d3581e61 | 698 | static int |
fba45db2 | 699 | proc_why (procinfo *pi) |
c3f6f71d JM |
700 | { |
701 | if (!pi->status_valid) | |
702 | if (!proc_get_status (pi)) | |
0df8b418 | 703 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 704 | |
c3f6f71d | 705 | return pi->prstatus.pr_lwp.pr_why; |
c3f6f71d | 706 | } |
c906108c | 707 | |
77382aee | 708 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 709 | |
d3581e61 | 710 | static int |
fba45db2 | 711 | proc_what (procinfo *pi) |
c3f6f71d JM |
712 | { |
713 | if (!pi->status_valid) | |
714 | if (!proc_get_status (pi)) | |
0df8b418 | 715 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 716 | |
c3f6f71d | 717 | return pi->prstatus.pr_lwp.pr_what; |
c3f6f71d | 718 | } |
c906108c | 719 | |
77382aee PA |
720 | /* This function is only called when PI is stopped by a watchpoint. |
721 | Assuming the OS supports it, write to *ADDR the data address which | |
722 | triggered it and return 1. Return 0 if it is not possible to know | |
723 | the address. */ | |
bf701c2c PM |
724 | |
725 | static int | |
726 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
727 | { | |
728 | if (!pi->status_valid) | |
729 | if (!proc_get_status (pi)) | |
730 | return 0; | |
731 | ||
f5656ead TT |
732 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
733 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c | 734 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
bf701c2c PM |
735 | return 1; |
736 | } | |
737 | ||
77382aee PA |
738 | /* Returns the pr_nsysarg field (number of args to the current |
739 | syscall). */ | |
c3f6f71d | 740 | |
d3581e61 | 741 | static int |
fba45db2 | 742 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
743 | { |
744 | if (!pi->status_valid) | |
745 | if (!proc_get_status (pi)) | |
746 | return 0; | |
19958708 | 747 | |
c3f6f71d | 748 | return pi->prstatus.pr_lwp.pr_nsysarg; |
c3f6f71d | 749 | } |
c906108c | 750 | |
77382aee PA |
751 | /* Returns the pr_sysarg field (pointer to the arguments of current |
752 | syscall). */ | |
c906108c | 753 | |
d3581e61 | 754 | static long * |
fba45db2 | 755 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
756 | { |
757 | if (!pi->status_valid) | |
758 | if (!proc_get_status (pi)) | |
759 | return NULL; | |
19958708 | 760 | |
c3f6f71d | 761 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
c3f6f71d | 762 | } |
77382aee | 763 | |
44122162 | 764 | /* Set or reset any of the following process flags: |
77382aee PA |
765 | PR_FORK -- forked child will inherit trace flags |
766 | PR_RLC -- traced process runs when last /proc file closed. | |
767 | PR_KLC -- traced process is killed when last /proc file closed. | |
768 | PR_ASYNC -- LWP's get to run/stop independently. | |
769 | ||
44122162 | 770 | This function is done using read/write [PCSET/PCRESET/PCUNSET]. |
77382aee PA |
771 | |
772 | Arguments: | |
773 | pi -- the procinfo | |
774 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
775 | mode -- 1 for set, 0 for reset. | |
776 | ||
777 | Returns non-zero for success, zero for failure. */ | |
c906108c | 778 | |
c3f6f71d | 779 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 780 | |
c3f6f71d | 781 | static int |
fba45db2 | 782 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
783 | { |
784 | long win = 0; /* default to fail */ | |
785 | ||
77382aee PA |
786 | /* These operations affect the process as a whole, and applying them |
787 | to an individual LWP has the same meaning as applying them to the | |
788 | main process. Therefore, if we're ever called with a pointer to | |
789 | an LWP's procinfo, let's substitute the process's procinfo and | |
790 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
791 | |
792 | if (pi->pid != 0) | |
793 | pi = find_procinfo_or_die (pi->pid, 0); | |
794 | ||
44122162 | 795 | procfs_ctl_t arg[2]; |
c5aa993b | 796 | |
44122162 RO |
797 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
798 | arg[0] = PCSET; | |
0df8b418 | 799 | else /* Reset the flag. */ |
44122162 RO |
800 | arg[0] = PCUNSET; |
801 | ||
802 | arg[1] = flag; | |
803 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 804 | |
77382aee PA |
805 | /* The above operation renders the procinfo's cached pstatus |
806 | obsolete. */ | |
c3f6f71d | 807 | pi->status_valid = 0; |
c906108c | 808 | |
c3f6f71d | 809 | if (!win) |
8a3fe4f8 | 810 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
811 | flag == PR_FORK ? "PR_FORK" : |
812 | flag == PR_RLC ? "PR_RLC" : | |
c3f6f71d | 813 | flag == PR_ASYNC ? "PR_ASYNC" : |
0d06e24b | 814 | flag == PR_KLC ? "PR_KLC" : |
c3f6f71d JM |
815 | "<unknown flag>", |
816 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 817 | |
c3f6f71d JM |
818 | return win; |
819 | } | |
c906108c | 820 | |
77382aee PA |
821 | /* Set the run_on_last_close flag. Process with all threads will |
822 | become runnable when debugger closes all /proc fds. Returns | |
823 | non-zero for success, zero for failure. */ | |
c906108c | 824 | |
d3581e61 | 825 | static int |
fba45db2 | 826 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 827 | { |
c3f6f71d JM |
828 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
829 | } | |
c906108c | 830 | |
77382aee PA |
831 | /* Reset the run_on_last_close flag. The process will NOT become |
832 | runnable when debugger closes its file handles. Returns non-zero | |
833 | for success, zero for failure. */ | |
c906108c | 834 | |
d3581e61 | 835 | static int |
fba45db2 | 836 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
837 | { |
838 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
839 | } |
840 | ||
77382aee PA |
841 | /* Reset inherit_on_fork flag. If the process forks a child while we |
842 | are registered for events in the parent, then we will NOT recieve | |
843 | events from the child. Returns non-zero for success, zero for | |
844 | failure. */ | |
c906108c | 845 | |
d3581e61 | 846 | static int |
fba45db2 | 847 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
848 | { |
849 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
850 | } | |
c906108c | 851 | |
77382aee PA |
852 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
853 | (signal etc.), the remaining LWPs will continue to run. Returns | |
854 | non-zero for success, zero for failure. */ | |
c906108c | 855 | |
d3581e61 | 856 | static int |
fba45db2 | 857 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
858 | { |
859 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
860 | } | |
c906108c | 861 | |
77382aee PA |
862 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
863 | (signal etc.), then all other LWPs will stop as well. Returns | |
864 | non-zero for success, zero for failure. */ | |
c906108c | 865 | |
d3581e61 | 866 | static int |
fba45db2 | 867 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
868 | { |
869 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
870 | } | |
c906108c | 871 | |
77382aee PA |
872 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
873 | for success, zero for failure. */ | |
c906108c | 874 | |
d3581e61 | 875 | static int |
fba45db2 | 876 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
877 | { |
878 | int win; | |
c906108c | 879 | |
77382aee PA |
880 | /* We might conceivably apply this operation to an LWP, and the |
881 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 882 | |
c3f6f71d JM |
883 | if (pi->ctl_fd == 0 && |
884 | open_procinfo_files (pi, FD_CTL) == 0) | |
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 | |
44122162 RO |
914 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
915 | /* We been runnin' and we stopped -- need to update status. */ | |
916 | pi->status_valid = 0; | |
c906108c | 917 | |
c3f6f71d | 918 | return win; |
c906108c SS |
919 | } |
920 | ||
77382aee PA |
921 | /* Make the process or LWP runnable. |
922 | ||
923 | Options (not all are implemented): | |
924 | - single-step | |
925 | - clear current fault | |
926 | - clear current signal | |
927 | - abort the current system call | |
928 | - stop as soon as finished with system call | |
929 | - (ioctl): set traced signal set | |
930 | - (ioctl): set held signal set | |
931 | - (ioctl): set traced fault set | |
932 | - (ioctl): set start pc (vaddr) | |
933 | ||
934 | Always clears the current fault. PI is the process or LWP to | |
935 | operate on. If STEP is true, set the process or LWP to trap after | |
936 | one instruction. If SIGNO is zero, clear the current signal if | |
937 | any; if non-zero, set the current signal to this one. Returns | |
938 | non-zero for success, zero for failure. */ | |
c3f6f71d | 939 | |
d3581e61 | 940 | static int |
fba45db2 | 941 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
942 | { |
943 | int win; | |
944 | int runflags; | |
945 | ||
77382aee PA |
946 | /* We will probably have to apply this operation to individual |
947 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 948 | |
c3f6f71d JM |
949 | if (pi->ctl_fd == 0 && |
950 | open_procinfo_files (pi, FD_CTL) == 0) | |
951 | { | |
952 | return 0; | |
953 | } | |
c906108c | 954 | |
0df8b418 | 955 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
956 | if (step) |
957 | runflags |= PRSTEP; | |
958 | if (signo == 0) | |
959 | runflags |= PRCSIG; | |
0df8b418 | 960 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 961 | proc_set_current_signal (pi, signo); |
c5aa993b | 962 | |
44122162 | 963 | procfs_ctl_t cmd[2]; |
c906108c | 964 | |
44122162 RO |
965 | cmd[0] = PCRUN; |
966 | cmd[1] = runflags; | |
967 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c906108c | 968 | |
c3f6f71d JM |
969 | return win; |
970 | } | |
c906108c | 971 | |
77382aee PA |
972 | /* Register to trace signals in the process or LWP. Returns non-zero |
973 | for success, zero for failure. */ | |
c906108c | 974 | |
d3581e61 | 975 | static int |
44122162 | 976 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 977 | { |
c3f6f71d JM |
978 | int win; |
979 | ||
77382aee PA |
980 | /* We should never have to apply this operation to any procinfo |
981 | except the one for the main process. If that ever changes for | |
982 | any reason, then take out the following clause and replace it | |
983 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 984 | |
c3f6f71d JM |
985 | if (pi->tid != 0) |
986 | pi = find_procinfo_or_die (pi->pid, 0); | |
987 | ||
44122162 RO |
988 | struct { |
989 | procfs_ctl_t cmd; | |
990 | /* Use char array to avoid alignment issues. */ | |
991 | char sigset[sizeof (sigset_t)]; | |
992 | } arg; | |
c906108c | 993 | |
44122162 RO |
994 | arg.cmd = PCSTRACE; |
995 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
996 | ||
997 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 998 | |
0df8b418 | 999 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1000 | pi->status_valid = 0; |
c906108c | 1001 | |
c3f6f71d | 1002 | if (!win) |
8a3fe4f8 | 1003 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1004 | return win; |
c906108c SS |
1005 | } |
1006 | ||
77382aee PA |
1007 | /* Register to trace hardware faults in the process or LWP. Returns |
1008 | non-zero for success, zero for failure. */ | |
c906108c | 1009 | |
d3581e61 | 1010 | static int |
fba45db2 | 1011 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1012 | { |
1013 | int win; | |
1014 | ||
77382aee PA |
1015 | /* We should never have to apply this operation to any procinfo |
1016 | except the one for the main process. If that ever changes for | |
1017 | any reason, then take out the following clause and replace it | |
1018 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1019 | |
c3f6f71d JM |
1020 | if (pi->tid != 0) |
1021 | pi = find_procinfo_or_die (pi->pid, 0); | |
1022 | ||
44122162 RO |
1023 | struct { |
1024 | procfs_ctl_t cmd; | |
1025 | /* Use char array to avoid alignment issues. */ | |
1026 | char fltset[sizeof (fltset_t)]; | |
1027 | } arg; | |
1028 | ||
1029 | arg.cmd = PCSFAULT; | |
1030 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1031 | |
44122162 | 1032 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
c906108c | 1033 | |
0df8b418 | 1034 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1035 | pi->status_valid = 0; |
c906108c | 1036 | |
c3f6f71d JM |
1037 | return win; |
1038 | } | |
c5aa993b | 1039 | |
77382aee PA |
1040 | /* Register to trace entry to system calls in the process or LWP. |
1041 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1042 | |
d3581e61 | 1043 | static int |
fba45db2 | 1044 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1045 | { |
c3f6f71d JM |
1046 | int win; |
1047 | ||
77382aee PA |
1048 | /* We should never have to apply this operation to any procinfo |
1049 | except the one for the main process. If that ever changes for | |
1050 | any reason, then take out the following clause and replace it | |
1051 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1052 | |
c3f6f71d JM |
1053 | if (pi->tid != 0) |
1054 | pi = find_procinfo_or_die (pi->pid, 0); | |
1055 | ||
44122162 RO |
1056 | struct gdb_proc_ctl_pcsentry { |
1057 | procfs_ctl_t cmd; | |
1058 | /* Use char array to avoid alignment issues. */ | |
1059 | char sysset[sizeof (sysset_t)]; | |
1060 | } *argp; | |
1061 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry); | |
c3f6f71d | 1062 | |
44122162 | 1063 | argp = (struct gdb_proc_ctl_pcsentry *) xmalloc (argp_size); |
c3f6f71d | 1064 | |
44122162 RO |
1065 | argp->cmd = PCSENTRY; |
1066 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
1067 | ||
1068 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1069 | xfree (argp); | |
37de36c6 | 1070 | |
77382aee PA |
1071 | /* The above operation renders the procinfo's cached pstatus |
1072 | obsolete. */ | |
c3f6f71d | 1073 | pi->status_valid = 0; |
19958708 | 1074 | |
c3f6f71d | 1075 | return win; |
c906108c SS |
1076 | } |
1077 | ||
77382aee PA |
1078 | /* Register to trace exit from system calls in the process or LWP. |
1079 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1080 | |
d3581e61 | 1081 | static int |
fba45db2 | 1082 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1083 | { |
1084 | int win; | |
1085 | ||
77382aee PA |
1086 | /* We should never have to apply this operation to any procinfo |
1087 | except the one for the main process. If that ever changes for | |
1088 | any reason, then take out the following clause and replace it | |
1089 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1090 | |
c3f6f71d JM |
1091 | if (pi->tid != 0) |
1092 | pi = find_procinfo_or_die (pi->pid, 0); | |
1093 | ||
44122162 RO |
1094 | struct gdb_proc_ctl_pcsexit { |
1095 | procfs_ctl_t cmd; | |
1096 | /* Use char array to avoid alignment issues. */ | |
1097 | char sysset[sizeof (sysset_t)]; | |
1098 | } *argp; | |
1099 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit); | |
1100 | ||
1101 | argp = (struct gdb_proc_ctl_pcsexit *) xmalloc (argp_size); | |
c906108c | 1102 | |
44122162 RO |
1103 | argp->cmd = PCSEXIT; |
1104 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1105 | |
44122162 RO |
1106 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
1107 | xfree (argp); | |
37de36c6 | 1108 | |
77382aee PA |
1109 | /* The above operation renders the procinfo's cached pstatus |
1110 | obsolete. */ | |
c3f6f71d | 1111 | pi->status_valid = 0; |
c906108c | 1112 | |
c3f6f71d JM |
1113 | return win; |
1114 | } | |
c906108c | 1115 | |
77382aee PA |
1116 | /* Specify the set of blocked / held signals in the process or LWP. |
1117 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1118 | |
d3581e61 | 1119 | static int |
44122162 | 1120 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1121 | { |
c3f6f71d JM |
1122 | int win; |
1123 | ||
77382aee PA |
1124 | /* We should never have to apply this operation to any procinfo |
1125 | except the one for the main process. If that ever changes for | |
1126 | any reason, then take out the following clause and replace it | |
1127 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1128 | |
c3f6f71d JM |
1129 | if (pi->tid != 0) |
1130 | pi = find_procinfo_or_die (pi->pid, 0); | |
1131 | ||
44122162 RO |
1132 | struct { |
1133 | procfs_ctl_t cmd; | |
1134 | /* Use char array to avoid alignment issues. */ | |
1135 | char hold[sizeof (sigset_t)]; | |
1136 | } arg; | |
1137 | ||
1138 | arg.cmd = PCSHOLD; | |
1139 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1140 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1141 | ||
77382aee PA |
1142 | /* The above operation renders the procinfo's cached pstatus |
1143 | obsolete. */ | |
c3f6f71d JM |
1144 | pi->status_valid = 0; |
1145 | ||
1146 | return win; | |
c906108c SS |
1147 | } |
1148 | ||
77382aee PA |
1149 | /* Returns the set of signals that are held / blocked. Will also copy |
1150 | the sigset if SAVE is non-zero. */ | |
c906108c | 1151 | |
44122162 RO |
1152 | static sigset_t * |
1153 | proc_get_held_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1154 | { |
44122162 | 1155 | sigset_t *ret = NULL; |
c3f6f71d | 1156 | |
77382aee PA |
1157 | /* We should never have to apply this operation to any procinfo |
1158 | except the one for the main process. If that ever changes for | |
1159 | any reason, then take out the following clause and replace it | |
1160 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1161 | |
c3f6f71d JM |
1162 | if (pi->tid != 0) |
1163 | pi = find_procinfo_or_die (pi->pid, 0); | |
1164 | ||
c3f6f71d JM |
1165 | if (!pi->status_valid) |
1166 | if (!proc_get_status (pi)) | |
1167 | return NULL; | |
1168 | ||
c3f6f71d | 1169 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d | 1170 | if (save && ret) |
44122162 | 1171 | memcpy (save, ret, sizeof (sigset_t)); |
c3f6f71d JM |
1172 | |
1173 | return ret; | |
c906108c SS |
1174 | } |
1175 | ||
77382aee PA |
1176 | /* Returns the set of signals that are traced / debugged. Will also |
1177 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1178 | |
44122162 RO |
1179 | static sigset_t * |
1180 | proc_get_traced_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1181 | { |
44122162 | 1182 | sigset_t *ret = NULL; |
c3f6f71d | 1183 | |
77382aee PA |
1184 | /* We should never have to apply this operation to any procinfo |
1185 | except the one for the main process. If that ever changes for | |
1186 | any reason, then take out the following clause and replace it | |
1187 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1188 | |
c3f6f71d JM |
1189 | if (pi->tid != 0) |
1190 | pi = find_procinfo_or_die (pi->pid, 0); | |
1191 | ||
c3f6f71d JM |
1192 | if (!pi->status_valid) |
1193 | if (!proc_get_status (pi)) | |
1194 | return NULL; | |
1195 | ||
1196 | ret = &pi->prstatus.pr_sigtrace; | |
c3f6f71d | 1197 | if (save && ret) |
44122162 | 1198 | memcpy (save, ret, sizeof (sigset_t)); |
c906108c | 1199 | |
c3f6f71d JM |
1200 | return ret; |
1201 | } | |
c906108c | 1202 | |
77382aee PA |
1203 | /* Returns the set of hardware faults that are traced /debugged. Will |
1204 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1205 | |
d3581e61 | 1206 | static fltset_t * |
fba45db2 | 1207 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1208 | { |
1209 | fltset_t *ret = NULL; | |
1210 | ||
77382aee PA |
1211 | /* We should never have to apply this operation to any procinfo |
1212 | except the one for the main process. If that ever changes for | |
1213 | any reason, then take out the following clause and replace it | |
1214 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1215 | |
c3f6f71d JM |
1216 | if (pi->tid != 0) |
1217 | pi = find_procinfo_or_die (pi->pid, 0); | |
1218 | ||
c3f6f71d JM |
1219 | if (!pi->status_valid) |
1220 | if (!proc_get_status (pi)) | |
1221 | return NULL; | |
1222 | ||
1223 | ret = &pi->prstatus.pr_flttrace; | |
c3f6f71d JM |
1224 | if (save && ret) |
1225 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1226 | |
c3f6f71d JM |
1227 | return ret; |
1228 | } | |
c906108c | 1229 | |
77382aee PA |
1230 | /* Returns the set of syscalls that are traced /debugged on entry. |
1231 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1232 | |
d3581e61 | 1233 | static sysset_t * |
fba45db2 | 1234 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1235 | { |
1236 | sysset_t *ret = NULL; | |
1237 | ||
77382aee PA |
1238 | /* We should never have to apply this operation to any procinfo |
1239 | except the one for the main process. If that ever changes for | |
1240 | any reason, then take out the following clause and replace it | |
1241 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1242 | |
c3f6f71d JM |
1243 | if (pi->tid != 0) |
1244 | pi = find_procinfo_or_die (pi->pid, 0); | |
1245 | ||
c3f6f71d JM |
1246 | if (!pi->status_valid) |
1247 | if (!proc_get_status (pi)) | |
1248 | return NULL; | |
1249 | ||
1250 | ret = &pi->prstatus.pr_sysentry; | |
c3f6f71d | 1251 | if (save && ret) |
44122162 | 1252 | memcpy (save, ret, sizeof (sysset_t)); |
c906108c | 1253 | |
c3f6f71d JM |
1254 | return ret; |
1255 | } | |
c5aa993b | 1256 | |
77382aee PA |
1257 | /* Returns the set of syscalls that are traced /debugged on exit. |
1258 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1259 | |
d3581e61 | 1260 | static sysset_t * |
fba45db2 | 1261 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1262 | { |
44122162 | 1263 | sysset_t *ret = NULL; |
c3f6f71d | 1264 | |
77382aee PA |
1265 | /* We should never have to apply this operation to any procinfo |
1266 | except the one for the main process. If that ever changes for | |
1267 | any reason, then take out the following clause and replace it | |
1268 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1269 | |
c3f6f71d JM |
1270 | if (pi->tid != 0) |
1271 | pi = find_procinfo_or_die (pi->pid, 0); | |
1272 | ||
c3f6f71d JM |
1273 | if (!pi->status_valid) |
1274 | if (!proc_get_status (pi)) | |
1275 | return NULL; | |
1276 | ||
1277 | ret = &pi->prstatus.pr_sysexit; | |
c3f6f71d | 1278 | if (save && ret) |
44122162 | 1279 | memcpy (save, ret, sizeof (sysset_t)); |
c3f6f71d JM |
1280 | |
1281 | return ret; | |
1282 | } | |
c906108c | 1283 | |
77382aee PA |
1284 | /* The current fault (if any) is cleared; the associated signal will |
1285 | not be sent to the process or LWP when it resumes. Returns | |
1286 | non-zero for success, zero for failure. */ | |
c906108c | 1287 | |
d3581e61 | 1288 | static int |
fba45db2 | 1289 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
1290 | { |
1291 | int win; | |
1292 | ||
77382aee PA |
1293 | /* We should never have to apply this operation to any procinfo |
1294 | except the one for the main process. If that ever changes for | |
1295 | any reason, then take out the following clause and replace it | |
1296 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1297 | |
c3f6f71d JM |
1298 | if (pi->tid != 0) |
1299 | pi = find_procinfo_or_die (pi->pid, 0); | |
1300 | ||
44122162 | 1301 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 1302 | |
44122162 | 1303 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d JM |
1304 | |
1305 | return win; | |
c906108c SS |
1306 | } |
1307 | ||
77382aee PA |
1308 | /* Set the "current signal" that will be delivered next to the |
1309 | process. NOTE: semantics are different from those of KILL. This | |
1310 | signal will be delivered to the process or LWP immediately when it | |
1311 | is resumed (even if the signal is held/blocked); it will NOT | |
1312 | immediately cause another event of interest, and will NOT first | |
1313 | trap back to the debugger. Returns non-zero for success, zero for | |
1314 | failure. */ | |
c3f6f71d | 1315 | |
d3581e61 | 1316 | static int |
fba45db2 | 1317 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1318 | { |
1319 | int win; | |
1320 | struct { | |
37de36c6 | 1321 | procfs_ctl_t cmd; |
c3f6f71d | 1322 | /* Use char array to avoid alignment issues. */ |
44122162 | 1323 | char sinfo[sizeof (siginfo_t)]; |
c3f6f71d | 1324 | } arg; |
44122162 | 1325 | siginfo_t mysinfo; |
c162e8c9 JM |
1326 | ptid_t wait_ptid; |
1327 | struct target_waitstatus wait_status; | |
c3f6f71d | 1328 | |
77382aee PA |
1329 | /* We should never have to apply this operation to any procinfo |
1330 | except the one for the main process. If that ever changes for | |
1331 | any reason, then take out the following clause and replace it | |
1332 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1333 | |
c3f6f71d JM |
1334 | if (pi->tid != 0) |
1335 | pi = find_procinfo_or_die (pi->pid, 0); | |
1336 | ||
c3f6f71d | 1337 | /* The pointer is just a type alias. */ |
c162e8c9 JM |
1338 | get_last_target_status (&wait_ptid, &wait_status); |
1339 | if (ptid_equal (wait_ptid, inferior_ptid) | |
1340 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 1341 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 | 1342 | && proc_get_status (pi) |
c162e8c9 | 1343 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
c162e8c9 JM |
1344 | ) |
1345 | /* Use the siginfo associated with the signal being | |
1346 | redelivered. */ | |
44122162 | 1347 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (siginfo_t)); |
c162e8c9 JM |
1348 | else |
1349 | { | |
73930d4d KH |
1350 | mysinfo.si_signo = signo; |
1351 | mysinfo.si_code = 0; | |
1352 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1353 | mysinfo.si_uid = getuid (); /* ?why? */ | |
44122162 | 1354 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); |
c162e8c9 | 1355 | } |
c3f6f71d | 1356 | |
c3f6f71d JM |
1357 | arg.cmd = PCSSIG; |
1358 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1359 | |
c3f6f71d JM |
1360 | return win; |
1361 | } | |
c906108c | 1362 | |
77382aee PA |
1363 | /* The current signal (if any) is cleared, and is not sent to the |
1364 | process or LWP when it resumes. Returns non-zero for success, zero | |
1365 | for failure. */ | |
c906108c | 1366 | |
d3581e61 | 1367 | static int |
fba45db2 | 1368 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
1369 | { |
1370 | int win; | |
1371 | ||
77382aee PA |
1372 | /* We should never have to apply this operation to any procinfo |
1373 | except the one for the main process. If that ever changes for | |
1374 | any reason, then take out the following clause and replace it | |
1375 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1376 | |
c3f6f71d JM |
1377 | if (pi->tid != 0) |
1378 | pi = find_procinfo_or_die (pi->pid, 0); | |
1379 | ||
44122162 RO |
1380 | struct { |
1381 | procfs_ctl_t cmd; | |
1382 | /* Use char array to avoid alignment issues. */ | |
1383 | char sinfo[sizeof (siginfo_t)]; | |
1384 | } arg; | |
1385 | siginfo_t mysinfo; | |
1386 | ||
1387 | arg.cmd = PCSSIG; | |
1388 | /* The pointer is just a type alias. */ | |
1389 | mysinfo.si_signo = 0; | |
1390 | mysinfo.si_code = 0; | |
1391 | mysinfo.si_errno = 0; | |
1392 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1393 | mysinfo.si_uid = getuid (); /* ?why? */ | |
1394 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); | |
1395 | ||
1396 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1397 | |
c3f6f71d JM |
1398 | return win; |
1399 | } | |
c906108c | 1400 | |
772cf8be MK |
1401 | /* Return the general-purpose registers for the process or LWP |
1402 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1403 | |
d3581e61 | 1404 | static gdb_gregset_t * |
fba45db2 | 1405 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
1406 | { |
1407 | if (!pi->status_valid || !pi->gregs_valid) | |
1408 | if (!proc_get_status (pi)) | |
1409 | return NULL; | |
1410 | ||
c3f6f71d | 1411 | return &pi->prstatus.pr_lwp.pr_reg; |
c3f6f71d | 1412 | } |
c5aa993b | 1413 | |
772cf8be MK |
1414 | /* Return the general-purpose registers for the process or LWP |
1415 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1416 | |
d3581e61 | 1417 | static gdb_fpregset_t * |
fba45db2 | 1418 | proc_get_fpregs (procinfo *pi) |
c906108c | 1419 | { |
c3f6f71d JM |
1420 | if (!pi->status_valid || !pi->fpregs_valid) |
1421 | if (!proc_get_status (pi)) | |
1422 | return NULL; | |
1423 | ||
c3f6f71d | 1424 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c906108c SS |
1425 | } |
1426 | ||
772cf8be MK |
1427 | /* Write the general-purpose registers back to the process or LWP |
1428 | corresponding to PI. Return non-zero for success, zero for | |
1429 | failure. */ | |
c3f6f71d | 1430 | |
d3581e61 | 1431 | static int |
fba45db2 | 1432 | proc_set_gregs (procinfo *pi) |
c906108c | 1433 | { |
c3f6f71d JM |
1434 | gdb_gregset_t *gregs; |
1435 | int win; | |
c5aa993b | 1436 | |
772cf8be MK |
1437 | gregs = proc_get_gregs (pi); |
1438 | if (gregs == NULL) | |
1439 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 1440 | |
772cf8be | 1441 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1442 | { |
c3f6f71d | 1443 | return 0; |
c906108c | 1444 | } |
c3f6f71d | 1445 | else |
c906108c | 1446 | { |
c3f6f71d | 1447 | struct { |
37de36c6 | 1448 | procfs_ctl_t cmd; |
c3f6f71d JM |
1449 | /* Use char array to avoid alignment issues. */ |
1450 | char gregs[sizeof (gdb_gregset_t)]; | |
1451 | } arg; | |
1452 | ||
772cf8be | 1453 | arg.cmd = PCSREG; |
c3f6f71d JM |
1454 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
1455 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1456 | } |
c3f6f71d | 1457 | |
772cf8be | 1458 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1459 | pi->gregs_valid = 0; |
1460 | return win; | |
c906108c SS |
1461 | } |
1462 | ||
772cf8be MK |
1463 | /* Write the floating-pointer registers back to the process or LWP |
1464 | corresponding to PI. Return non-zero for success, zero for | |
1465 | failure. */ | |
c3f6f71d | 1466 | |
d3581e61 | 1467 | static int |
fba45db2 | 1468 | proc_set_fpregs (procinfo *pi) |
c906108c | 1469 | { |
c3f6f71d JM |
1470 | gdb_fpregset_t *fpregs; |
1471 | int win; | |
1472 | ||
772cf8be MK |
1473 | fpregs = proc_get_fpregs (pi); |
1474 | if (fpregs == NULL) | |
1475 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 1476 | |
772cf8be | 1477 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1478 | { |
c3f6f71d | 1479 | return 0; |
c906108c | 1480 | } |
c3f6f71d | 1481 | else |
c906108c | 1482 | { |
c3f6f71d | 1483 | struct { |
37de36c6 | 1484 | procfs_ctl_t cmd; |
c3f6f71d JM |
1485 | /* Use char array to avoid alignment issues. */ |
1486 | char fpregs[sizeof (gdb_fpregset_t)]; | |
1487 | } arg; | |
1488 | ||
772cf8be | 1489 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
1490 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
1491 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1492 | } |
c3f6f71d | 1493 | |
772cf8be | 1494 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1495 | pi->fpregs_valid = 0; |
1496 | return win; | |
c906108c SS |
1497 | } |
1498 | ||
77382aee PA |
1499 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
1500 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1501 | |
d3581e61 | 1502 | static int |
fba45db2 | 1503 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
1504 | { |
1505 | int win; | |
c906108c | 1506 | |
77382aee PA |
1507 | /* We might conceivably apply this operation to an LWP, and the |
1508 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1509 | |
c3f6f71d JM |
1510 | if (pi->ctl_fd == 0 && |
1511 | open_procinfo_files (pi, FD_CTL) == 0) | |
1512 | { | |
1513 | return 0; | |
1514 | } | |
1515 | else | |
1516 | { | |
37de36c6 | 1517 | procfs_ctl_t cmd[2]; |
c906108c | 1518 | |
c3f6f71d JM |
1519 | cmd[0] = PCKILL; |
1520 | cmd[1] = signo; | |
1521 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c3f6f71d | 1522 | } |
c906108c | 1523 | |
c3f6f71d JM |
1524 | return win; |
1525 | } | |
c906108c | 1526 | |
77382aee PA |
1527 | /* Find the pid of the process that started this one. Returns the |
1528 | parent process pid, or zero. */ | |
c906108c | 1529 | |
d3581e61 | 1530 | static int |
fba45db2 | 1531 | proc_parent_pid (procinfo *pi) |
c906108c | 1532 | { |
77382aee PA |
1533 | /* We should never have to apply this operation to any procinfo |
1534 | except the one for the main process. If that ever changes for | |
1535 | any reason, then take out the following clause and replace it | |
1536 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1537 | |
c3f6f71d JM |
1538 | if (pi->tid != 0) |
1539 | pi = find_procinfo_or_die (pi->pid, 0); | |
1540 | ||
1541 | if (!pi->status_valid) | |
1542 | if (!proc_get_status (pi)) | |
1543 | return 0; | |
c5aa993b | 1544 | |
c3f6f71d JM |
1545 | return pi->prstatus.pr_ppid; |
1546 | } | |
1547 | ||
9a043c1d AC |
1548 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
1549 | (a.k.a void pointer)! */ | |
1550 | ||
1551 | static void * | |
1552 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
1553 | { | |
f5656ead | 1554 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
1555 | void *ptr; |
1556 | ||
4e906f53 | 1557 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 1558 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 1559 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
1560 | return ptr; |
1561 | } | |
1562 | ||
a0911fd0 | 1563 | static int |
fba45db2 | 1564 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 1565 | { |
c3f6f71d | 1566 | struct { |
37de36c6 | 1567 | procfs_ctl_t cmd; |
c3f6f71d JM |
1568 | char watch[sizeof (prwatch_t)]; |
1569 | } arg; | |
73930d4d | 1570 | prwatch_t pwatch; |
c3f6f71d | 1571 | |
9a043c1d AC |
1572 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
1573 | convert a target address into something that can be stored in a | |
1574 | native data structure. */ | |
73930d4d | 1575 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
73930d4d KH |
1576 | pwatch.pr_size = len; |
1577 | pwatch.pr_wflags = wflags; | |
c3f6f71d | 1578 | arg.cmd = PCWATCH; |
73930d4d | 1579 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d | 1580 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
c906108c SS |
1581 | } |
1582 | ||
965b60ee | 1583 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 1584 | |
c3f6f71d | 1585 | #include <sys/sysi86.h> |
c906108c | 1586 | |
77382aee PA |
1587 | /* The KEY is actually the value of the lower 16 bits of the GS |
1588 | register for the LWP that we're interested in. Returns the | |
1589 | matching ssh struct (LDT entry). */ | |
c906108c | 1590 | |
337c776f | 1591 | static struct ssd * |
fba45db2 | 1592 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 1593 | { |
c3f6f71d | 1594 | static struct ssd *ldt_entry = NULL; |
c3f6f71d | 1595 | char pathname[MAX_PROC_NAME_SIZE]; |
c3f6f71d JM |
1596 | |
1597 | /* Allocate space for one LDT entry. | |
1598 | This alloc must persist, because we return a pointer to it. */ | |
1599 | if (ldt_entry == NULL) | |
8d749320 | 1600 | ldt_entry = XNEW (struct ssd); |
c3f6f71d JM |
1601 | |
1602 | /* Open the file descriptor for the LDT table. */ | |
1603 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
5dc1a704 TT |
1604 | scoped_fd fd (open_with_retry (pathname, O_RDONLY)); |
1605 | if (fd.get () < 0) | |
c906108c | 1606 | { |
c3f6f71d JM |
1607 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
1608 | return NULL; | |
c906108c SS |
1609 | } |
1610 | ||
c3f6f71d | 1611 | /* Now 'read' thru the table, find a match and return it. */ |
5dc1a704 TT |
1612 | while (read (fd.get (), ldt_entry, sizeof (struct ssd)) |
1613 | == sizeof (struct ssd)) | |
c906108c | 1614 | { |
c3f6f71d JM |
1615 | if (ldt_entry->sel == 0 && |
1616 | ldt_entry->bo == 0 && | |
1617 | ldt_entry->acc1 == 0 && | |
1618 | ldt_entry->acc2 == 0) | |
1619 | break; /* end of table */ | |
0df8b418 | 1620 | /* If key matches, return this entry. */ |
c3f6f71d | 1621 | if (ldt_entry->sel == key) |
70b33f19 | 1622 | return ldt_entry; |
c906108c | 1623 | } |
0df8b418 | 1624 | /* Loop ended, match not found. */ |
c3f6f71d | 1625 | return NULL; |
c3f6f71d | 1626 | } |
c906108c | 1627 | |
77382aee | 1628 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
1629 | |
1630 | struct ssd * | |
1631 | procfs_find_LDT_entry (ptid_t ptid) | |
1632 | { | |
1633 | gdb_gregset_t *gregs; | |
1634 | int key; | |
1635 | procinfo *pi; | |
1636 | ||
0df8b418 | 1637 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 1638 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 1639 | { |
0b62613e | 1640 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 1641 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1642 | return NULL; |
1643 | } | |
0df8b418 | 1644 | /* get its general registers. */ |
965b60ee JB |
1645 | if ((gregs = proc_get_gregs (pi)) == NULL) |
1646 | { | |
0b62613e | 1647 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 1648 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1649 | return NULL; |
1650 | } | |
0df8b418 | 1651 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
1652 | key = (*gregs)[GS] & 0xffff; |
1653 | ||
0df8b418 | 1654 | /* Find the matching entry and return it. */ |
965b60ee JB |
1655 | return proc_get_LDT_entry (pi, key); |
1656 | } | |
1657 | ||
1658 | #endif | |
c906108c | 1659 | |
c3f6f71d | 1660 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 1661 | |
c3f6f71d | 1662 | /* =================== Thread "MODULE" =================== */ |
c906108c | 1663 | |
44122162 RO |
1664 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
1665 | since there is a different way to do threads on every OS. */ | |
c906108c | 1666 | |
44122162 | 1667 | /* Returns the number of threads for the process. */ |
c906108c | 1668 | |
d3581e61 | 1669 | static int |
fba45db2 | 1670 | proc_get_nthreads (procinfo *pi) |
c906108c | 1671 | { |
c3f6f71d JM |
1672 | if (!pi->status_valid) |
1673 | if (!proc_get_status (pi)) | |
1674 | return 0; | |
c5aa993b | 1675 | |
44122162 RO |
1676 | /* Only works for the process procinfo, because the LWP procinfos do not |
1677 | get prstatus filled in. */ | |
0df8b418 | 1678 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 1679 | pi = find_procinfo_or_die (pi->pid, 0); |
c3f6f71d | 1680 | return pi->prstatus.pr_nlwp; |
c906108c SS |
1681 | } |
1682 | ||
77382aee PA |
1683 | /* LWP version. |
1684 | ||
1685 | Return the ID of the thread that had an event of interest. | |
1686 | (ie. the one that hit a breakpoint or other traced event). All | |
1687 | other things being equal, this should be the ID of a thread that is | |
1688 | currently executing. */ | |
c3f6f71d | 1689 | |
d3581e61 | 1690 | static int |
fba45db2 | 1691 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 1692 | { |
77382aee PA |
1693 | /* Note: this should be applied to the root procinfo for the |
1694 | process, not to the procinfo for an LWP. If applied to the | |
1695 | procinfo for an LWP, it will simply return that LWP's ID. In | |
1696 | that case, find the parent process procinfo. */ | |
19958708 | 1697 | |
c3f6f71d JM |
1698 | if (pi->tid != 0) |
1699 | pi = find_procinfo_or_die (pi->pid, 0); | |
1700 | ||
1701 | if (!pi->status_valid) | |
1702 | if (!proc_get_status (pi)) | |
1703 | return 0; | |
1704 | ||
c3f6f71d | 1705 | return pi->prstatus.pr_lwp.pr_lwpid; |
c3f6f71d JM |
1706 | } |
1707 | ||
77382aee PA |
1708 | /* Discover the IDs of all the threads within the process, and create |
1709 | a procinfo for each of them (chained to the parent). This | |
1710 | unfortunately requires a different method on every OS. Returns | |
1711 | non-zero for success, zero for failure. */ | |
c906108c | 1712 | |
a0911fd0 | 1713 | static int |
fba45db2 | 1714 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
1715 | { |
1716 | if (thread && parent) /* sanity */ | |
c906108c | 1717 | { |
c3f6f71d JM |
1718 | thread->status_valid = 0; |
1719 | if (!proc_get_status (thread)) | |
1720 | destroy_one_procinfo (&parent->thread_list, thread); | |
1721 | } | |
1722 | return 0; /* keep iterating */ | |
1723 | } | |
c5aa993b | 1724 | |
004527cb AC |
1725 | static void |
1726 | do_closedir_cleanup (void *dir) | |
1727 | { | |
b196bc4c | 1728 | closedir ((DIR *) dir); |
004527cb AC |
1729 | } |
1730 | ||
d3581e61 | 1731 | static int |
fba45db2 | 1732 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
1733 | { |
1734 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
1735 | struct dirent *direntry; | |
1736 | struct cleanup *old_chain = NULL; | |
1737 | procinfo *thread; | |
1738 | DIR *dirp; | |
1739 | int lwpid; | |
1740 | ||
77382aee PA |
1741 | /* We should never have to apply this operation to any procinfo |
1742 | except the one for the main process. If that ever changes for | |
1743 | any reason, then take out the following clause and replace it | |
1744 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1745 | |
c3f6f71d JM |
1746 | if (pi->tid != 0) |
1747 | pi = find_procinfo_or_die (pi->pid, 0); | |
1748 | ||
1749 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
1750 | ||
05b4bd79 PA |
1751 | /* Note: this brute-force method was originally devised for Unixware |
1752 | (support removed since), and will also work on Solaris 2.6 and | |
1753 | 2.7. The original comment mentioned the existence of a much | |
1754 | simpler and more elegant way to do this on Solaris, but didn't | |
1755 | point out what that was. */ | |
c3f6f71d JM |
1756 | |
1757 | strcpy (pathname, pi->pathname); | |
1758 | strcat (pathname, "/lwp"); | |
1759 | if ((dirp = opendir (pathname)) == NULL) | |
1760 | proc_error (pi, "update_threads, opendir", __LINE__); | |
1761 | ||
004527cb | 1762 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
1763 | while ((direntry = readdir (dirp)) != NULL) |
1764 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
1765 | { | |
1766 | lwpid = atoi (&direntry->d_name[0]); | |
1767 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
1768 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
1769 | } | |
1770 | pi->threads_valid = 1; | |
1771 | do_cleanups (old_chain); | |
1772 | return 1; | |
1773 | } | |
c906108c | 1774 | |
77382aee PA |
1775 | /* Given a pointer to a function, call that function once for each lwp |
1776 | in the procinfo list, until the function returns non-zero, in which | |
1777 | event return the value returned by the function. | |
1778 | ||
1779 | Note: this function does NOT call update_threads. If you want to | |
1780 | discover new threads first, you must call that function explicitly. | |
1781 | This function just makes a quick pass over the currently-known | |
1782 | procinfos. | |
1783 | ||
1784 | PI is the parent process procinfo. FUNC is the per-thread | |
1785 | function. PTR is an opaque parameter for function. Returns the | |
1786 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 1787 | |
d3581e61 | 1788 | static int |
d0849a9a KB |
1789 | proc_iterate_over_threads (procinfo *pi, |
1790 | int (*func) (procinfo *, procinfo *, void *), | |
1791 | void *ptr) | |
c906108c | 1792 | { |
c3f6f71d JM |
1793 | procinfo *thread, *next; |
1794 | int retval = 0; | |
c906108c | 1795 | |
77382aee PA |
1796 | /* We should never have to apply this operation to any procinfo |
1797 | except the one for the main process. If that ever changes for | |
1798 | any reason, then take out the following clause and replace it | |
1799 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1800 | |
c3f6f71d JM |
1801 | if (pi->tid != 0) |
1802 | pi = find_procinfo_or_die (pi->pid, 0); | |
1803 | ||
1804 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 1805 | { |
0df8b418 | 1806 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
1807 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
1808 | break; | |
c906108c | 1809 | } |
c3f6f71d JM |
1810 | |
1811 | return retval; | |
c906108c SS |
1812 | } |
1813 | ||
c3f6f71d JM |
1814 | /* =================== END, Thread "MODULE" =================== */ |
1815 | ||
1816 | /* =================== END, /proc "MODULE" =================== */ | |
1817 | ||
1818 | /* =================== GDB "MODULE" =================== */ | |
1819 | ||
77382aee PA |
1820 | /* Here are all of the gdb target vector functions and their |
1821 | friends. */ | |
c3f6f71d | 1822 | |
39f77062 | 1823 | static ptid_t do_attach (ptid_t ptid); |
6bd6f3b6 | 1824 | static void do_detach (); |
9185ddce | 1825 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 1826 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 1827 | |
77382aee PA |
1828 | /* Sets up the inferior to be debugged. Registers to trace signals, |
1829 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
1830 | may want to customize that. Returns zero for success (note! | |
1831 | unlike most functions in this module); on failure, returns the LINE | |
1832 | NUMBER where it failed! */ | |
c3f6f71d JM |
1833 | |
1834 | static int | |
fba45db2 | 1835 | procfs_debug_inferior (procinfo *pi) |
c906108c | 1836 | { |
c3f6f71d | 1837 | fltset_t traced_faults; |
44122162 | 1838 | sigset_t traced_signals; |
37de36c6 KB |
1839 | sysset_t *traced_syscall_entries; |
1840 | sysset_t *traced_syscall_exits; | |
1841 | int status; | |
c906108c | 1842 | |
0df8b418 MS |
1843 | /* Register to trace hardware faults in the child. */ |
1844 | prfillset (&traced_faults); /* trace all faults... */ | |
44122162 | 1845 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
1846 | if (!proc_set_traced_faults (pi, &traced_faults)) |
1847 | return __LINE__; | |
c906108c | 1848 | |
2455069d UW |
1849 | /* Initially, register to trace all signals in the child. */ |
1850 | prfillset (&traced_signals); | |
1851 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
1852 | return __LINE__; |
1853 | ||
37de36c6 | 1854 | |
c3f6f71d | 1855 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 | 1856 | traced_syscall_entries = sysset_t_alloc (pi); |
44122162 RO |
1857 | premptyset (traced_syscall_entries); |
1858 | praddset (traced_syscall_entries, SYS_exit); | |
1859 | praddset (traced_syscall_entries, SYS_lwp_exit); | |
c906108c | 1860 | |
37de36c6 KB |
1861 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
1862 | xfree (traced_syscall_entries); | |
1863 | if (!status) | |
c3f6f71d JM |
1864 | return __LINE__; |
1865 | ||
44122162 | 1866 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
1867 | /* GW: Rationale... |
1868 | Not all systems with /proc have all the exec* syscalls with the same | |
1869 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 1870 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 1871 | |
37de36c6 | 1872 | traced_syscall_exits = sysset_t_alloc (pi); |
44122162 | 1873 | premptyset (traced_syscall_exits); |
c3f6f71d | 1874 | #ifdef SYS_exec |
44122162 | 1875 | praddset (traced_syscall_exits, SYS_exec); |
37de36c6 | 1876 | #endif |
44122162 RO |
1877 | praddset (traced_syscall_exits, SYS_execve); |
1878 | praddset (traced_syscall_exits, SYS_lwp_create); | |
1879 | praddset (traced_syscall_exits, SYS_lwp_exit); | |
c906108c | 1880 | |
37de36c6 KB |
1881 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
1882 | xfree (traced_syscall_exits); | |
1883 | if (!status) | |
c3f6f71d JM |
1884 | return __LINE__; |
1885 | ||
c3f6f71d | 1886 | return 0; |
c906108c SS |
1887 | } |
1888 | ||
f6ac5f3d PA |
1889 | void |
1890 | procfs_target::attach (const char *args, int from_tty) | |
c906108c | 1891 | { |
c3f6f71d JM |
1892 | char *exec_file; |
1893 | int pid; | |
1894 | ||
74164c56 | 1895 | pid = parse_pid_to_attach (args); |
c3f6f71d | 1896 | |
c3f6f71d | 1897 | if (pid == getpid ()) |
8a3fe4f8 | 1898 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 1899 | |
c3f6f71d | 1900 | if (from_tty) |
c906108c | 1901 | { |
c3f6f71d JM |
1902 | exec_file = get_exec_file (0); |
1903 | ||
1904 | if (exec_file) | |
a3f17187 | 1905 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 1906 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 1907 | else |
a3f17187 | 1908 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 1909 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
1910 | |
1911 | fflush (stdout); | |
c906108c | 1912 | } |
39f77062 | 1913 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
f6ac5f3d PA |
1914 | if (!target_is_pushed (this)) |
1915 | push_target (this); | |
c3f6f71d JM |
1916 | } |
1917 | ||
f6ac5f3d PA |
1918 | void |
1919 | procfs_target::detach (inferior *inf, int from_tty) | |
c3f6f71d | 1920 | { |
dfd4cc63 | 1921 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b | 1922 | |
c3f6f71d | 1923 | if (from_tty) |
c906108c | 1924 | { |
995816ba | 1925 | const char *exec_file; |
cc377e6b | 1926 | |
c3f6f71d | 1927 | exec_file = get_exec_file (0); |
cc377e6b | 1928 | if (exec_file == NULL) |
c3f6f71d | 1929 | exec_file = ""; |
cc377e6b | 1930 | |
a3f17187 | 1931 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
1932 | target_pid_to_str (pid_to_ptid (pid))); |
1933 | gdb_flush (gdb_stdout); | |
c906108c | 1934 | } |
19958708 | 1935 | |
6bd6f3b6 | 1936 | do_detach (); |
cc377e6b | 1937 | |
39f77062 | 1938 | inferior_ptid = null_ptid; |
7f9f62ba | 1939 | detach_inferior (pid); |
f6ac5f3d | 1940 | maybe_unpush_target (); |
c906108c SS |
1941 | } |
1942 | ||
39f77062 KB |
1943 | static ptid_t |
1944 | do_attach (ptid_t ptid) | |
c906108c | 1945 | { |
c3f6f71d | 1946 | procinfo *pi; |
181e7f93 | 1947 | struct inferior *inf; |
c3f6f71d | 1948 | int fail; |
2689673f | 1949 | int lwpid; |
c3f6f71d | 1950 | |
dfd4cc63 | 1951 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 1952 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
1953 | |
1954 | if (!open_procinfo_files (pi, FD_CTL)) | |
1955 | { | |
1956 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 1957 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 1958 | ptid_get_pid (ptid)); |
c3f6f71d JM |
1959 | dead_procinfo (pi, errmsg, NOKILL); |
1960 | } | |
c906108c | 1961 | |
c3f6f71d JM |
1962 | /* Stop the process (if it isn't already stopped). */ |
1963 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 1964 | { |
c3f6f71d JM |
1965 | pi->was_stopped = 1; |
1966 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
1967 | } |
1968 | else | |
1969 | { | |
c3f6f71d JM |
1970 | pi->was_stopped = 0; |
1971 | /* Set the process to run again when we close it. */ | |
1972 | if (!proc_set_run_on_last_close (pi)) | |
1973 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
1974 | ||
0df8b418 | 1975 | /* Now stop the process. */ |
c3f6f71d JM |
1976 | if (!proc_stop_process (pi)) |
1977 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
1978 | pi->ignore_next_sigstop = 1; | |
c906108c | 1979 | } |
c3f6f71d JM |
1980 | /* Save some of the /proc state to be restored if we detach. */ |
1981 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
1982 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
1983 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
1984 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 1985 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
1986 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
1987 | NOKILL); | |
37de36c6 | 1988 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 1989 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
1990 | NOKILL); |
1991 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
1992 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
1993 | ||
1994 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
1995 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
1996 | ||
6c95b8df PA |
1997 | inf = current_inferior (); |
1998 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 1999 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 2000 | inf->attach_flag = 1; |
2689673f PA |
2001 | |
2002 | /* Create a procinfo for the current lwp. */ | |
2003 | lwpid = proc_get_current_thread (pi); | |
2004 | create_procinfo (pi->pid, lwpid); | |
2005 | ||
2006 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 2007 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
2008 | add_thread (ptid); |
2009 | ||
2010 | return ptid; | |
c906108c SS |
2011 | } |
2012 | ||
2013 | static void | |
6bd6f3b6 | 2014 | do_detach () |
c906108c | 2015 | { |
c3f6f71d | 2016 | procinfo *pi; |
c906108c | 2017 | |
0df8b418 | 2018 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
2019 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
2020 | 0); /* FIXME: threads */ | |
c5aa993b | 2021 | |
c3f6f71d JM |
2022 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
2023 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 2024 | |
c3f6f71d JM |
2025 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
2026 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
2027 | ||
37de36c6 | 2028 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2029 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
2030 | ||
37de36c6 | 2031 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2032 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
2033 | ||
2034 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
2035 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
2036 | ||
6bd6f3b6 SM |
2037 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
2038 | if (!(pi->was_stopped) | |
2039 | || query (_("Was stopped when attached, make it runnable again? "))) | |
c3f6f71d JM |
2040 | { |
2041 | /* Clear any pending signal. */ | |
2042 | if (!proc_clear_current_fault (pi)) | |
2043 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
2044 | ||
6bd6f3b6 | 2045 | if (!proc_clear_current_signal (pi)) |
1a303dec MS |
2046 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
2047 | ||
c3f6f71d JM |
2048 | if (!proc_set_run_on_last_close (pi)) |
2049 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
2050 | } | |
2051 | ||
c3f6f71d | 2052 | destroy_procinfo (pi); |
c906108c SS |
2053 | } |
2054 | ||
772cf8be MK |
2055 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
2056 | for all registers. | |
2057 | ||
2058 | ??? Is the following note still relevant? We can't get individual | |
2059 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
2060 | don't bother with caching at all in that case. | |
2061 | ||
2062 | NOTE: Since the /proc interface cannot give us individual | |
2063 | registers, we pay no attention to REGNUM, and just fetch them all. | |
2064 | This results in the possibility that we will do unnecessarily many | |
2065 | fetches, since we may be called repeatedly for individual | |
2066 | registers. So we cache the results, and mark the cache invalid | |
2067 | when the process is resumed. */ | |
c3f6f71d | 2068 | |
f6ac5f3d PA |
2069 | void |
2070 | procfs_target::fetch_registers (struct regcache *regcache, int regnum) | |
c906108c | 2071 | { |
772cf8be MK |
2072 | gdb_gregset_t *gregs; |
2073 | procinfo *pi; | |
bcc0c096 SM |
2074 | ptid_t ptid = regcache_get_ptid (regcache); |
2075 | int pid = ptid_get_pid (ptid); | |
2076 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2077 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2078 | |
2689673f | 2079 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2080 | |
2081 | if (pi == NULL) | |
8a3fe4f8 | 2082 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
bcc0c096 | 2083 | target_pid_to_str (ptid)); |
c3f6f71d | 2084 | |
772cf8be MK |
2085 | gregs = proc_get_gregs (pi); |
2086 | if (gregs == NULL) | |
c3f6f71d JM |
2087 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
2088 | ||
56be3814 | 2089 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 2090 | |
40a6adc1 | 2091 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2092 | { |
772cf8be MK |
2093 | gdb_fpregset_t *fpregs; |
2094 | ||
40a6adc1 MD |
2095 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2096 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2097 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2098 | return; /* Not a floating point register. */ |
c5aa993b | 2099 | |
772cf8be MK |
2100 | fpregs = proc_get_fpregs (pi); |
2101 | if (fpregs == NULL) | |
60054393 | 2102 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 2103 | |
56be3814 | 2104 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 2105 | } |
c906108c SS |
2106 | } |
2107 | ||
772cf8be MK |
2108 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
2109 | this for all registers. | |
2110 | ||
2111 | NOTE: Since the /proc interface will not read individual registers, | |
2112 | we will cache these requests until the process is resumed, and only | |
2113 | then write them back to the inferior process. | |
77382aee | 2114 | |
772cf8be MK |
2115 | FIXME: is that a really bad idea? Have to think about cases where |
2116 | writing one register might affect the value of others, etc. */ | |
c906108c | 2117 | |
f6ac5f3d PA |
2118 | void |
2119 | procfs_target::store_registers (struct regcache *regcache, int regnum) | |
c3f6f71d | 2120 | { |
772cf8be MK |
2121 | gdb_gregset_t *gregs; |
2122 | procinfo *pi; | |
bcc0c096 SM |
2123 | ptid_t ptid = regcache_get_ptid (regcache); |
2124 | int pid = ptid_get_pid (ptid); | |
2125 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2126 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2127 | |
2689673f | 2128 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2129 | |
2130 | if (pi == NULL) | |
8a3fe4f8 | 2131 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
bcc0c096 | 2132 | target_pid_to_str (ptid)); |
c906108c | 2133 | |
772cf8be MK |
2134 | gregs = proc_get_gregs (pi); |
2135 | if (gregs == NULL) | |
c3f6f71d | 2136 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 2137 | |
56be3814 | 2138 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
2139 | if (!proc_set_gregs (pi)) |
2140 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 2141 | |
40a6adc1 | 2142 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2143 | { |
772cf8be MK |
2144 | gdb_fpregset_t *fpregs; |
2145 | ||
40a6adc1 MD |
2146 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2147 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2148 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2149 | return; /* Not a floating point register. */ |
60054393 | 2150 | |
772cf8be MK |
2151 | fpregs = proc_get_fpregs (pi); |
2152 | if (fpregs == NULL) | |
60054393 MS |
2153 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
2154 | ||
56be3814 | 2155 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
2156 | if (!proc_set_fpregs (pi)) |
2157 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
2158 | } | |
c3f6f71d | 2159 | } |
c906108c | 2160 | |
37de36c6 KB |
2161 | static int |
2162 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
2163 | { | |
37de36c6 KB |
2164 | if (scall == SYS_lwp_exit) |
2165 | return 1; | |
37de36c6 KB |
2166 | return 0; |
2167 | } | |
2168 | ||
2169 | static int | |
2170 | syscall_is_exit (procinfo *pi, int scall) | |
2171 | { | |
37de36c6 KB |
2172 | if (scall == SYS_exit) |
2173 | return 1; | |
37de36c6 KB |
2174 | return 0; |
2175 | } | |
2176 | ||
2177 | static int | |
2178 | syscall_is_exec (procinfo *pi, int scall) | |
2179 | { | |
2180 | #ifdef SYS_exec | |
2181 | if (scall == SYS_exec) | |
2182 | return 1; | |
2183 | #endif | |
37de36c6 KB |
2184 | if (scall == SYS_execve) |
2185 | return 1; | |
37de36c6 KB |
2186 | return 0; |
2187 | } | |
2188 | ||
2189 | static int | |
2190 | syscall_is_lwp_create (procinfo *pi, int scall) | |
2191 | { | |
37de36c6 KB |
2192 | if (scall == SYS_lwp_create) |
2193 | return 1; | |
37de36c6 KB |
2194 | return 0; |
2195 | } | |
2196 | ||
77382aee PA |
2197 | /* Retrieve the next stop event from the child process. If child has |
2198 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
2199 | (or possibly wait eventcodes) into gdb internal event codes. | |
2200 | Returns the id of process (and possibly thread) that incurred the | |
2201 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 2202 | |
f6ac5f3d PA |
2203 | ptid_t |
2204 | procfs_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
2205 | int options) | |
c906108c | 2206 | { |
0df8b418 | 2207 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 2208 | procinfo *pi; |
39f77062 KB |
2209 | int wstat; |
2210 | int temp_tid; | |
2211 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
2212 | int why, what, flags; |
2213 | int retry = 0; | |
c906108c | 2214 | |
c3f6f71d | 2215 | wait_again: |
c906108c | 2216 | |
c3f6f71d JM |
2217 | retry++; |
2218 | wstat = 0; | |
39f77062 | 2219 | retval = pid_to_ptid (-1); |
c906108c | 2220 | |
0df8b418 | 2221 | /* Find procinfo for main process. */ |
dfd4cc63 | 2222 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2223 | if (pi) |
c906108c | 2224 | { |
0df8b418 | 2225 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
2226 | pi->status_valid = 0; |
2227 | pi->gregs_valid = 0; | |
2228 | pi->fpregs_valid = 0; | |
2229 | ||
0df8b418 | 2230 | #if 0 /* just try this out... */ |
c3f6f71d JM |
2231 | flags = proc_flags (pi); |
2232 | why = proc_why (pi); | |
2233 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 2234 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
2235 | #endif |
2236 | /* If child is not stopped, wait for it to stop. */ | |
2237 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
2238 | !proc_wait_for_stop (pi)) | |
c906108c | 2239 | { |
0df8b418 | 2240 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 2241 | if (errno == ENOENT) |
c906108c | 2242 | { |
39f77062 KB |
2243 | int wait_retval; |
2244 | ||
0df8b418 | 2245 | /* /proc file not found; presumably child has terminated. */ |
f6ac5f3d | 2246 | wait_retval = ::wait (&wstat); /* "wait" for the child's exit. */ |
c3f6f71d | 2247 | |
dfd4cc63 LM |
2248 | /* Wrong child? */ |
2249 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
2250 | error (_("procfs: couldn't stop " |
2251 | "process %d: wait returned %d."), | |
dfd4cc63 | 2252 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 2253 | /* FIXME: might I not just use waitpid? |
0df8b418 | 2254 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 2255 | retval = pid_to_ptid (wait_retval); |
c906108c | 2256 | } |
d1566ff5 FN |
2257 | else if (errno == EINTR) |
2258 | goto wait_again; | |
c3f6f71d | 2259 | else |
c906108c | 2260 | { |
0df8b418 | 2261 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 2262 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 2263 | } |
c3f6f71d JM |
2264 | } |
2265 | else | |
2266 | { | |
2267 | /* This long block is reached if either: | |
2268 | a) the child was already stopped, or | |
2269 | b) we successfully waited for the child with wait_for_stop. | |
2270 | This block will analyze the /proc status, and translate it | |
2271 | into a waitstatus for GDB. | |
2272 | ||
2273 | If we actually had to call wait because the /proc file | |
19958708 | 2274 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
2275 | because we already have a waitstatus. */ |
2276 | ||
2277 | flags = proc_flags (pi); | |
2278 | why = proc_why (pi); | |
2279 | what = proc_what (pi); | |
2280 | ||
c3f6f71d | 2281 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 2282 | { |
c3f6f71d JM |
2283 | /* If it's running async (for single_thread control), |
2284 | set it back to normal again. */ | |
2285 | if (flags & PR_ASYNC) | |
2286 | if (!proc_unset_async (pi)) | |
2287 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
c3f6f71d JM |
2288 | |
2289 | if (info_verbose) | |
2290 | proc_prettyprint_why (why, what, 1); | |
2291 | ||
2292 | /* The 'pid' we will return to GDB is composed of | |
2293 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 2294 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
2295 | |
2296 | switch (why) { | |
2297 | case PR_SIGNALLED: | |
2298 | wstat = (what << 8) | 0177; | |
2299 | break; | |
2300 | case PR_SYSENTRY: | |
37de36c6 | 2301 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 2302 | { |
17faa917 DJ |
2303 | if (print_thread_events) |
2304 | printf_unfiltered (_("[%s exited]\n"), | |
2305 | target_pid_to_str (retval)); | |
37de36c6 KB |
2306 | delete_thread (retval); |
2307 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2308 | return retval; | |
2309 | } | |
2310 | else if (syscall_is_exit (pi, what)) | |
2311 | { | |
181e7f93 PA |
2312 | struct inferior *inf; |
2313 | ||
0df8b418 | 2314 | /* Handle SYS_exit call only. */ |
37de36c6 | 2315 | /* Stopped at entry to SYS_exit. |
19958708 | 2316 | Make it runnable, resume it, then use |
37de36c6 | 2317 | the wait system call to get its exit code. |
19958708 | 2318 | Proc_run_process always clears the current |
37de36c6 KB |
2319 | fault and signal. |
2320 | Then return its exit status. */ | |
2321 | pi->status_valid = 0; | |
2322 | wstat = 0; | |
19958708 | 2323 | /* FIXME: what we should do is return |
37de36c6 KB |
2324 | TARGET_WAITKIND_SPURIOUS. */ |
2325 | if (!proc_run_process (pi, 0, 0)) | |
2326 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
2327 | |
2328 | inf = find_inferior_pid (pi->pid); | |
2329 | if (inf->attach_flag) | |
c3f6f71d | 2330 | { |
19958708 | 2331 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
2332 | return a "success" exit code. Bogus: what if |
2333 | it returns something else? */ | |
2334 | wstat = 0; | |
39f77062 | 2335 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
2336 | } |
2337 | else | |
2338 | { | |
f6ac5f3d | 2339 | int temp = ::wait (&wstat); |
37de36c6 KB |
2340 | |
2341 | /* FIXME: shouldn't I make sure I get the right | |
2342 | event from the right process? If (for | |
2343 | instance) I have killed an earlier inferior | |
2344 | process but failed to clean up after it | |
2345 | somehow, I could get its termination event | |
2346 | here. */ | |
2347 | ||
0df8b418 MS |
2348 | /* If wait returns -1, that's what we return |
2349 | to GDB. */ | |
37de36c6 | 2350 | if (temp < 0) |
39f77062 | 2351 | retval = pid_to_ptid (temp); |
c3f6f71d | 2352 | } |
c3f6f71d | 2353 | } |
37de36c6 KB |
2354 | else |
2355 | { | |
a3f17187 | 2356 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
2357 | proc_prettyprint_syscall (proc_what (pi), 0); |
2358 | printf_filtered ("\n"); | |
44122162 RO |
2359 | |
2360 | long i, nsysargs, *sysargs; | |
2361 | ||
2362 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2363 | (sysargs = proc_sysargs (pi)) != NULL) | |
2364 | { | |
2365 | printf_filtered (_("%ld syscall arguments:\n"), | |
2366 | nsysargs); | |
2367 | for (i = 0; i < nsysargs; i++) | |
2368 | printf_filtered ("#%ld: 0x%08lx\n", | |
2369 | i, sysargs[i]); | |
2370 | } | |
2371 | ||
37de36c6 KB |
2372 | if (status) |
2373 | { | |
0df8b418 MS |
2374 | /* How to exit gracefully, returning "unknown |
2375 | event". */ | |
37de36c6 | 2376 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2377 | return inferior_ptid; |
37de36c6 KB |
2378 | } |
2379 | else | |
2380 | { | |
2381 | /* How to keep going without returning to wfi: */ | |
049a8570 | 2382 | target_continue_no_signal (ptid); |
37de36c6 KB |
2383 | goto wait_again; |
2384 | } | |
2385 | } | |
2386 | break; | |
2387 | case PR_SYSEXIT: | |
2388 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 2389 | { |
37de36c6 KB |
2390 | /* Hopefully this is our own "fork-child" execing |
2391 | the real child. Hoax this event into a trap, and | |
2392 | GDB will see the child about to execute its start | |
0df8b418 | 2393 | address. */ |
37de36c6 KB |
2394 | wstat = (SIGTRAP << 8) | 0177; |
2395 | } | |
2396 | else if (syscall_is_lwp_create (pi, what)) | |
2397 | { | |
77382aee PA |
2398 | /* This syscall is somewhat like fork/exec. We |
2399 | will get the event twice: once for the parent | |
2400 | LWP, and once for the child. We should already | |
2401 | know about the parent LWP, but the child will | |
2402 | be new to us. So, whenever we get this event, | |
2403 | if it represents a new thread, simply add the | |
2404 | thread to the list. */ | |
c3f6f71d | 2405 | |
37de36c6 | 2406 | /* If not in procinfo list, add it. */ |
39f77062 KB |
2407 | temp_tid = proc_get_current_thread (pi); |
2408 | if (!find_procinfo (pi->pid, temp_tid)) | |
2409 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 2410 | |
dfd4cc63 | 2411 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 2412 | /* If not in GDB's thread list, add it. */ |
39f77062 | 2413 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
2414 | add_thread (temp_ptid); |
2415 | ||
0df8b418 | 2416 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 2417 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2418 | return inferior_ptid; |
37de36c6 KB |
2419 | } |
2420 | else if (syscall_is_lwp_exit (pi, what)) | |
2421 | { | |
17faa917 DJ |
2422 | if (print_thread_events) |
2423 | printf_unfiltered (_("[%s exited]\n"), | |
2424 | target_pid_to_str (retval)); | |
37de36c6 KB |
2425 | delete_thread (retval); |
2426 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2427 | return retval; | |
c3f6f71d | 2428 | } |
37de36c6 KB |
2429 | else if (0) |
2430 | { | |
2431 | /* FIXME: Do we need to handle SYS_sproc, | |
2432 | SYS_fork, or SYS_vfork here? The old procfs | |
2433 | seemed to use this event to handle threads on | |
2434 | older (non-LWP) systems, where I'm assuming | |
19958708 | 2435 | that threads were actually separate processes. |
37de36c6 KB |
2436 | Irix, maybe? Anyway, low priority for now. */ |
2437 | } | |
2438 | else | |
2439 | { | |
a3f17187 | 2440 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
2441 | proc_prettyprint_syscall (proc_what (pi), 0); |
2442 | printf_filtered ("\n"); | |
44122162 RO |
2443 | |
2444 | long i, nsysargs, *sysargs; | |
2445 | ||
2446 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2447 | (sysargs = proc_sysargs (pi)) != NULL) | |
2448 | { | |
2449 | printf_filtered (_("%ld syscall arguments:\n"), | |
2450 | nsysargs); | |
2451 | for (i = 0; i < nsysargs; i++) | |
2452 | printf_filtered ("#%ld: 0x%08lx\n", | |
2453 | i, sysargs[i]); | |
2454 | } | |
2455 | ||
37de36c6 | 2456 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2457 | return inferior_ptid; |
37de36c6 | 2458 | } |
c3f6f71d JM |
2459 | break; |
2460 | case PR_REQUESTED: | |
2461 | #if 0 /* FIXME */ | |
2462 | wstat = (SIGSTOP << 8) | 0177; | |
2463 | break; | |
2464 | #else | |
2465 | if (retry < 5) | |
2466 | { | |
a3f17187 | 2467 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
2468 | pi->status_valid = 0; |
2469 | goto wait_again; | |
2470 | } | |
2471 | else | |
2472 | { | |
2473 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
2474 | temp_tid = proc_get_current_thread (pi); |
2475 | if (!find_procinfo (pi->pid, temp_tid)) | |
2476 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
2477 | |
2478 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 2479 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 2480 | if (!in_thread_list (temp_ptid)) |
93815fbf | 2481 | add_thread (temp_ptid); |
c3f6f71d JM |
2482 | |
2483 | status->kind = TARGET_WAITKIND_STOPPED; | |
b196bc4c | 2484 | status->value.sig = GDB_SIGNAL_0; |
c3f6f71d JM |
2485 | return retval; |
2486 | } | |
2487 | #endif | |
2488 | case PR_JOBCONTROL: | |
2489 | wstat = (what << 8) | 0177; | |
2490 | break; | |
2491 | case PR_FAULTED: | |
7af6341f | 2492 | switch (what) { |
c3f6f71d JM |
2493 | case FLTWATCH: |
2494 | wstat = (SIGTRAP << 8) | 0177; | |
2495 | break; | |
0df8b418 | 2496 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 2497 | case FLTPRIV: |
c3f6f71d | 2498 | case FLTILL: |
c3f6f71d JM |
2499 | wstat = (SIGILL << 8) | 0177; |
2500 | break; | |
2501 | case FLTBPT: | |
c3f6f71d | 2502 | case FLTTRACE: |
c3f6f71d JM |
2503 | wstat = (SIGTRAP << 8) | 0177; |
2504 | break; | |
2505 | case FLTSTACK: | |
2506 | case FLTACCESS: | |
c3f6f71d | 2507 | case FLTBOUNDS: |
c3f6f71d JM |
2508 | wstat = (SIGSEGV << 8) | 0177; |
2509 | break; | |
2510 | case FLTIOVF: | |
2511 | case FLTIZDIV: | |
c3f6f71d | 2512 | case FLTFPE: |
c3f6f71d JM |
2513 | wstat = (SIGFPE << 8) | 0177; |
2514 | break; | |
3e43a32a | 2515 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
2516 | default: /* FIXME: use si_signo if possible for |
2517 | fault. */ | |
39f77062 | 2518 | retval = pid_to_ptid (-1); |
c3f6f71d | 2519 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 2520 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2521 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2522 | error (_("... giving up...")); |
c3f6f71d JM |
2523 | break; |
2524 | } | |
2525 | break; /* case PR_FAULTED: */ | |
2526 | default: /* switch (why) unmatched */ | |
2527 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 2528 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2529 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2530 | error (_("... giving up...")); |
c3f6f71d JM |
2531 | break; |
2532 | } | |
77382aee PA |
2533 | /* Got this far without error: If retval isn't in the |
2534 | threads database, add it. */ | |
dfd4cc63 | 2535 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 2536 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 2537 | !in_thread_list (retval)) |
c906108c | 2538 | { |
77382aee PA |
2539 | /* We have a new thread. We need to add it both to |
2540 | GDB's list and to our own. If we don't create a | |
2541 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 2542 | add_thread (retval); |
dfd4cc63 LM |
2543 | if (find_procinfo (ptid_get_pid (retval), |
2544 | ptid_get_lwp (retval)) == NULL) | |
2545 | create_procinfo (ptid_get_pid (retval), | |
2546 | ptid_get_lwp (retval)); | |
c906108c | 2547 | } |
c906108c | 2548 | } |
0df8b418 | 2549 | else /* Flags do not indicate STOPPED. */ |
c906108c | 2550 | { |
0df8b418 | 2551 | /* surely this can't happen... */ |
c3f6f71d JM |
2552 | printf_filtered ("procfs:%d -- process not stopped.\n", |
2553 | __LINE__); | |
2554 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 2555 | error (_("procfs: ...giving up...")); |
c906108c | 2556 | } |
c906108c | 2557 | } |
c906108c | 2558 | |
c3f6f71d JM |
2559 | if (status) |
2560 | store_waitstatus (status, wstat); | |
c906108c SS |
2561 | } |
2562 | ||
c3f6f71d JM |
2563 | return retval; |
2564 | } | |
c906108c | 2565 | |
4e73f23d RM |
2566 | /* Perform a partial transfer to/from the specified object. For |
2567 | memory transfers, fall back to the old memory xfer functions. */ | |
2568 | ||
f6ac5f3d PA |
2569 | enum target_xfer_status |
2570 | procfs_target::xfer_partial (enum target_object object, | |
2571 | const char *annex, gdb_byte *readbuf, | |
2572 | const gdb_byte *writebuf, ULONGEST offset, | |
2573 | ULONGEST len, ULONGEST *xfered_len) | |
4e73f23d RM |
2574 | { |
2575 | switch (object) | |
2576 | { | |
2577 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 2578 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d | 2579 | |
4e73f23d | 2580 | case TARGET_OBJECT_AUXV: |
f6ac5f3d | 2581 | return memory_xfer_auxv (this, object, annex, readbuf, writebuf, |
9b409511 | 2582 | offset, len, xfered_len); |
4e73f23d RM |
2583 | |
2584 | default: | |
f6ac5f3d PA |
2585 | return this->beneath->xfer_partial (object, annex, |
2586 | readbuf, writebuf, offset, len, | |
2587 | xfered_len); | |
4e73f23d RM |
2588 | } |
2589 | } | |
2590 | ||
e96027e0 PA |
2591 | /* Helper for procfs_xfer_partial that handles memory transfers. |
2592 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 2593 | |
e96027e0 PA |
2594 | static enum target_xfer_status |
2595 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2596 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
2597 | { |
2598 | procinfo *pi; | |
e96027e0 | 2599 | int nbytes; |
c906108c | 2600 | |
0df8b418 | 2601 | /* Find procinfo for main process. */ |
dfd4cc63 | 2602 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2603 | if (pi->as_fd == 0 && |
2604 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 2605 | { |
c3f6f71d | 2606 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 2607 | return TARGET_XFER_E_IO; |
c906108c | 2608 | } |
c906108c | 2609 | |
e96027e0 PA |
2610 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
2611 | return TARGET_XFER_E_IO; | |
2612 | ||
2613 | if (writebuf != NULL) | |
c906108c | 2614 | { |
e96027e0 PA |
2615 | PROCFS_NOTE ("write memory:\n"); |
2616 | nbytes = write (pi->as_fd, writebuf, len); | |
2617 | } | |
2618 | else | |
2619 | { | |
2620 | PROCFS_NOTE ("read memory:\n"); | |
2621 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 2622 | } |
e96027e0 PA |
2623 | if (nbytes <= 0) |
2624 | return TARGET_XFER_E_IO; | |
2625 | *xfered_len = nbytes; | |
2626 | return TARGET_XFER_OK; | |
c906108c SS |
2627 | } |
2628 | ||
77382aee PA |
2629 | /* Called by target_resume before making child runnable. Mark cached |
2630 | registers and status's invalid. If there are "dirty" caches that | |
2631 | need to be written back to the child process, do that. | |
c906108c | 2632 | |
77382aee PA |
2633 | File descriptors are also cached. As they are a limited resource, |
2634 | we cannot hold onto them indefinitely. However, as they are | |
2635 | expensive to open, we don't want to throw them away | |
2636 | indescriminately either. As a compromise, we will keep the file | |
2637 | descriptors for the parent process, but discard any file | |
2638 | descriptors we may have accumulated for the threads. | |
2639 | ||
2640 | As this function is called by iterate_over_threads, it always | |
2641 | returns zero (so that iterate_over_threads will keep | |
2642 | iterating). */ | |
c3f6f71d JM |
2643 | |
2644 | static int | |
fba45db2 | 2645 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 2646 | { |
77382aee PA |
2647 | /* About to run the child; invalidate caches and do any other |
2648 | cleanup. */ | |
c906108c | 2649 | |
c3f6f71d JM |
2650 | #if 0 |
2651 | if (pi->gregs_dirty) | |
2652 | if (parent == NULL || | |
2653 | proc_get_current_thread (parent) != pi->tid) | |
2654 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
2655 | proc_warn (pi, "target_resume, set_gregs", | |
2656 | __LINE__); | |
f5656ead | 2657 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
2658 | if (pi->fpregs_dirty) |
2659 | if (parent == NULL || | |
2660 | proc_get_current_thread (parent) != pi->tid) | |
2661 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 2662 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 2663 | __LINE__); |
c906108c | 2664 | #endif |
c906108c | 2665 | |
c3f6f71d | 2666 | if (parent != NULL) |
c906108c | 2667 | { |
c3f6f71d | 2668 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 2669 | Close any file descriptors that it might have open. |
c3f6f71d JM |
2670 | We don't do this to the master (parent) procinfo. */ |
2671 | ||
2672 | close_procinfo_files (pi); | |
c906108c | 2673 | } |
c3f6f71d JM |
2674 | pi->gregs_valid = 0; |
2675 | pi->fpregs_valid = 0; | |
2676 | #if 0 | |
2677 | pi->gregs_dirty = 0; | |
2678 | pi->fpregs_dirty = 0; | |
c906108c | 2679 | #endif |
c3f6f71d JM |
2680 | pi->status_valid = 0; |
2681 | pi->threads_valid = 0; | |
c906108c | 2682 | |
c3f6f71d | 2683 | return 0; |
c906108c SS |
2684 | } |
2685 | ||
0fda6bd2 | 2686 | #if 0 |
77382aee PA |
2687 | /* A callback function for iterate_over_threads. Find the |
2688 | asynchronous signal thread, and make it runnable. See if that | |
2689 | helps matters any. */ | |
c906108c | 2690 | |
c3f6f71d | 2691 | static int |
fba45db2 | 2692 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 2693 | { |
c3f6f71d JM |
2694 | #ifdef PR_ASLWP |
2695 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 2696 | { |
c3f6f71d JM |
2697 | if (!proc_run_process (pi, 0, -1)) |
2698 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
2699 | return 1; | |
c906108c | 2700 | } |
c906108c | 2701 | #endif |
c3f6f71d | 2702 | return 0; |
c906108c | 2703 | } |
0fda6bd2 | 2704 | #endif |
c906108c | 2705 | |
77382aee PA |
2706 | /* Make the child process runnable. Normally we will then call |
2707 | procfs_wait and wait for it to stop again (unless gdb is async). | |
2708 | ||
2709 | If STEP is true, then arrange for the child to stop again after | |
2710 | executing a single instruction. If SIGNO is zero, then cancel any | |
2711 | pending signal; if non-zero, then arrange for the indicated signal | |
2712 | to be delivered to the child when it runs. If PID is -1, then | |
2713 | allow any child thread to run; if non-zero, then allow only the | |
2714 | indicated thread to run. (not implemented yet). */ | |
c906108c | 2715 | |
f6ac5f3d PA |
2716 | void |
2717 | procfs_target::resume (ptid_t ptid, int step, enum gdb_signal signo) | |
c906108c | 2718 | { |
c3f6f71d JM |
2719 | procinfo *pi, *thread; |
2720 | int native_signo; | |
2721 | ||
19958708 | 2722 | /* 2.1: |
c3f6f71d | 2723 | prrun.prflags |= PRSVADDR; |
19958708 | 2724 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 2725 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 2726 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
2727 | prrun.prflags |= PRCFAULT; clear current fault. |
2728 | ||
2729 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 2730 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
2731 | PRSVADDR is unnecessary. |
2732 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
2733 | This basically leaves PRSTEP and PRCSIG. | |
2734 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
2735 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 2736 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 2737 | |
0df8b418 | 2738 | /* Find procinfo for main process. */ |
dfd4cc63 | 2739 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2740 | |
77382aee | 2741 | /* First cut: ignore pid argument. */ |
c3f6f71d | 2742 | errno = 0; |
c906108c | 2743 | |
c3f6f71d JM |
2744 | /* Convert signal to host numbering. */ |
2745 | if (signo == 0 || | |
a493e3e2 | 2746 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
2747 | native_signo = 0; |
2748 | else | |
2ea28649 | 2749 | native_signo = gdb_signal_to_host (signo); |
c906108c | 2750 | |
c3f6f71d | 2751 | pi->ignore_next_sigstop = 0; |
c906108c | 2752 | |
77382aee PA |
2753 | /* Running the process voids all cached registers and status. */ |
2754 | /* Void the threads' caches first. */ | |
19958708 | 2755 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
2756 | /* Void the process procinfo's caches. */ |
2757 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 2758 | |
dfd4cc63 | 2759 | if (ptid_get_pid (ptid) != -1) |
c906108c | 2760 | { |
77382aee PA |
2761 | /* Resume a specific thread, presumably suppressing the |
2762 | others. */ | |
dfd4cc63 | 2763 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 2764 | if (thread != NULL) |
c906108c | 2765 | { |
c3f6f71d JM |
2766 | if (thread->tid != 0) |
2767 | { | |
77382aee PA |
2768 | /* We're to resume a specific thread, and not the |
2769 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
2770 | if (!proc_set_async (pi)) |
2771 | proc_error (pi, "target_resume, set_async", __LINE__); | |
c3f6f71d | 2772 | #if 0 |
19958708 | 2773 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
2774 | make_signal_thread_runnable, |
2775 | NULL); | |
2776 | #endif | |
0df8b418 MS |
2777 | pi = thread; /* Substitute the thread's procinfo |
2778 | for run. */ | |
c3f6f71d | 2779 | } |
c906108c SS |
2780 | } |
2781 | } | |
c906108c | 2782 | |
c3f6f71d | 2783 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 2784 | { |
c3f6f71d | 2785 | if (errno == EBUSY) |
77382aee PA |
2786 | warning (_("resume: target already running. " |
2787 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
2788 | else |
2789 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 2790 | } |
c3f6f71d | 2791 | } |
c906108c | 2792 | |
77382aee | 2793 | /* Set up to trace signals in the child process. */ |
c906108c | 2794 | |
f6ac5f3d PA |
2795 | void |
2796 | procfs_target::pass_signals (int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 2797 | { |
44122162 | 2798 | sigset_t signals; |
dfd4cc63 | 2799 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 2800 | int signo; |
c906108c | 2801 | |
2455069d UW |
2802 | prfillset (&signals); |
2803 | ||
2804 | for (signo = 0; signo < NSIG; signo++) | |
2805 | { | |
2ea28649 | 2806 | int target_signo = gdb_signal_from_host (signo); |
2455069d | 2807 | if (target_signo < numsigs && pass_signals[target_signo]) |
44122162 | 2808 | prdelset (&signals, signo); |
2455069d UW |
2809 | } |
2810 | ||
2811 | if (!proc_set_traced_signals (pi, &signals)) | |
2812 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 2813 | } |
c906108c | 2814 | |
77382aee | 2815 | /* Print status information about the child process. */ |
c906108c | 2816 | |
f6ac5f3d PA |
2817 | void |
2818 | procfs_target::files_info () | |
c3f6f71d | 2819 | { |
181e7f93 | 2820 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 2821 | |
a3f17187 | 2822 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 2823 | inf->attach_flag? "attached": "child", |
39f77062 | 2824 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 2825 | } |
c906108c | 2826 | |
77382aee PA |
2827 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
2828 | should only be applied to the real process, not to an LWP, because | |
2829 | of the check for parent-process. If we need this to work for an | |
2830 | LWP, it needs some more logic. */ | |
c906108c | 2831 | |
c3f6f71d | 2832 | static void |
fba45db2 | 2833 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
2834 | { |
2835 | int parent_pid; | |
c906108c | 2836 | |
c3f6f71d | 2837 | parent_pid = proc_parent_pid (pi); |
c3f6f71d | 2838 | if (!proc_kill (pi, SIGKILL)) |
103b3ef5 | 2839 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d | 2840 | destroy_procinfo (pi); |
c906108c | 2841 | |
c3f6f71d JM |
2842 | /* If pi is GDB's child, wait for it to die. */ |
2843 | if (parent_pid == getpid ()) | |
19958708 | 2844 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
2845 | Should we check the returned event? */ |
2846 | { | |
0d06e24b | 2847 | #if 0 |
c3f6f71d | 2848 | int status, ret; |
c906108c | 2849 | |
c3f6f71d JM |
2850 | ret = waitpid (pi->pid, &status, 0); |
2851 | #else | |
2852 | wait (NULL); | |
2853 | #endif | |
2854 | } | |
2855 | } | |
c906108c | 2856 | |
77382aee PA |
2857 | /* We're done debugging it, and we want it to go away. Then we want |
2858 | GDB to forget all about it. */ | |
c906108c | 2859 | |
f6ac5f3d PA |
2860 | void |
2861 | procfs_target::kill () | |
c906108c | 2862 | { |
39f77062 | 2863 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 2864 | { |
0df8b418 | 2865 | /* Find procinfo for main process. */ |
dfd4cc63 | 2866 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 2867 | |
c3f6f71d JM |
2868 | if (pi) |
2869 | unconditionally_kill_inferior (pi); | |
bc1e6c81 | 2870 | target_mourn_inferior (inferior_ptid); |
c906108c | 2871 | } |
c3f6f71d JM |
2872 | } |
2873 | ||
77382aee | 2874 | /* Forget we ever debugged this thing! */ |
c906108c | 2875 | |
f6ac5f3d PA |
2876 | void |
2877 | procfs_target::mourn_inferior () | |
c3f6f71d JM |
2878 | { |
2879 | procinfo *pi; | |
c906108c | 2880 | |
39f77062 | 2881 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 2882 | { |
0df8b418 | 2883 | /* Find procinfo for main process. */ |
dfd4cc63 | 2884 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2885 | if (pi) |
2886 | destroy_procinfo (pi); | |
c906108c | 2887 | } |
6a3cb8e8 PA |
2888 | |
2889 | generic_mourn_inferior (); | |
8181d85f | 2890 | |
f6ac5f3d | 2891 | maybe_unpush_target (); |
c3f6f71d | 2892 | } |
c906108c | 2893 | |
77382aee PA |
2894 | /* When GDB forks to create a runnable inferior process, this function |
2895 | is called on the parent side of the fork. It's job is to do | |
2896 | whatever is necessary to make the child ready to be debugged, and | |
2897 | then wait for the child to synchronize. */ | |
c906108c | 2898 | |
19958708 | 2899 | static void |
28439f5e | 2900 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
2901 | { |
2902 | procinfo *pi; | |
44122162 | 2903 | sigset_t signals; |
c3f6f71d | 2904 | int fail; |
2689673f | 2905 | int lwpid; |
c906108c | 2906 | |
c3f6f71d JM |
2907 | /* This routine called on the parent side (GDB side) |
2908 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
2909 | if (!target_is_pushed (ops)) |
2910 | push_target (ops); | |
c906108c | 2911 | |
c3f6f71d | 2912 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 2913 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
2914 | |
2915 | if (!open_procinfo_files (pi, FD_CTL)) | |
2916 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
2917 | ||
2918 | /* | |
2919 | xmalloc // done | |
2920 | open_procinfo_files // done | |
2921 | link list // done | |
2922 | prfillset (trace) | |
2923 | procfs_notice_signals | |
2924 | prfillset (fault) | |
2925 | prdelset (FLTPAGE) | |
2926 | PIOCWSTOP | |
2927 | PIOCSFAULT | |
2928 | */ | |
2929 | ||
77382aee | 2930 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
2931 | if (!(proc_flags (pi) & PR_STOPPED) && |
2932 | !(proc_wait_for_stop (pi))) | |
2933 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
2934 | ||
2935 | /* Save some of the /proc state to be restored if we detach. */ | |
2936 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 2937 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
2938 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
2939 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
2940 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2941 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
2942 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2943 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 2944 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 2945 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 2946 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2947 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
2948 | ||
c3f6f71d JM |
2949 | if ((fail = procfs_debug_inferior (pi)) != 0) |
2950 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
2951 | ||
0d06e24b JM |
2952 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
2953 | and possibly even turning ON kill-on-last-close at this point. But | |
2954 | I can't make that change without careful testing which I don't have | |
2955 | time to do right now... */ | |
c3f6f71d JM |
2956 | /* Turn on run-on-last-close flag so that the child |
2957 | will die if GDB goes away for some reason. */ | |
2958 | if (!proc_set_run_on_last_close (pi)) | |
2959 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
2960 | ||
2689673f PA |
2961 | /* We now have have access to the lwpid of the main thread/lwp. */ |
2962 | lwpid = proc_get_current_thread (pi); | |
2963 | ||
2964 | /* Create a procinfo for the main lwp. */ | |
2965 | create_procinfo (pid, lwpid); | |
2966 | ||
2967 | /* We already have a main thread registered in the thread table at | |
2968 | this point, but it didn't have any lwp info yet. Notify the core | |
2969 | about it. This changes inferior_ptid as well. */ | |
2970 | thread_change_ptid (pid_to_ptid (pid), | |
793e1c06 | 2971 | ptid_build (pid, lwpid, 0)); |
c906108c | 2972 | |
2090129c | 2973 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c3f6f71d | 2974 | } |
c906108c | 2975 | |
77382aee PA |
2976 | /* When GDB forks to create a new process, this function is called on |
2977 | the child side of the fork before GDB exec's the user program. Its | |
2978 | job is to make the child minimally debuggable, so that the parent | |
2979 | GDB process can connect to the child and take over. This function | |
2980 | should do only the minimum to make that possible, and to | |
2981 | synchronize with the parent process. The parent process should | |
2982 | take care of the details. */ | |
c3f6f71d JM |
2983 | |
2984 | static void | |
fba45db2 | 2985 | procfs_set_exec_trap (void) |
c3f6f71d JM |
2986 | { |
2987 | /* This routine called on the child side (inferior side) | |
2988 | after GDB forks the inferior. It must use only local variables, | |
2989 | because it may be sharing data space with its parent. */ | |
c906108c | 2990 | |
c3f6f71d | 2991 | procinfo *pi; |
37de36c6 | 2992 | sysset_t *exitset; |
c906108c | 2993 | |
c3f6f71d | 2994 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 2995 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 2996 | |
c3f6f71d JM |
2997 | if (open_procinfo_files (pi, FD_CTL) == 0) |
2998 | { | |
2999 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
3000 | gdb_flush (gdb_stderr); | |
77382aee PA |
3001 | /* No need to call "dead_procinfo", because we're going to |
3002 | exit. */ | |
c3f6f71d JM |
3003 | _exit (127); |
3004 | } | |
c906108c | 3005 | |
44122162 | 3006 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
3007 | /* GW: Rationale... |
3008 | Not all systems with /proc have all the exec* syscalls with the same | |
3009 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 3010 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 3011 | |
37de36c6 | 3012 | exitset = sysset_t_alloc (pi); |
44122162 | 3013 | premptyset (exitset); |
c3f6f71d | 3014 | #ifdef SYS_exec |
44122162 | 3015 | praddset (exitset, SYS_exec); |
c906108c | 3016 | #endif |
44122162 | 3017 | praddset (exitset, SYS_execve); |
37de36c6 KB |
3018 | |
3019 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 3020 | { |
c3f6f71d JM |
3021 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
3022 | gdb_flush (gdb_stderr); | |
3023 | _exit (127); | |
c906108c | 3024 | } |
c3f6f71d | 3025 | |
0df8b418 | 3026 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
3027 | /* Turn off inherit on fork flag so that all grand-children |
3028 | of gdb start with tracing flags cleared. */ | |
3029 | if (!proc_unset_inherit_on_fork (pi)) | |
3030 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
3031 | ||
3032 | /* Turn off run on last close flag, so that the child process | |
3033 | cannot run away just because we close our handle on it. | |
3034 | We want it to wait for the parent to attach. */ | |
3035 | if (!proc_unset_run_on_last_close (pi)) | |
3036 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
3037 | ||
19958708 | 3038 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 3039 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 3040 | /*destroy_procinfo (pi);*/ |
c906108c | 3041 | } |
c906108c | 3042 | |
77382aee PA |
3043 | /* This function is called BEFORE gdb forks the inferior process. Its |
3044 | only real responsibility is to set things up for the fork, and tell | |
3045 | GDB which two functions to call after the fork (one for the parent, | |
3046 | and one for the child). | |
3047 | ||
3048 | This function does a complicated search for a unix shell program, | |
3049 | which it then uses to parse arguments and environment variables to | |
3050 | be sent to the child. I wonder whether this code could not be | |
3051 | abstracted out and shared with other unix targets such as | |
3052 | inf-ptrace? */ | |
c906108c | 3053 | |
f6ac5f3d PA |
3054 | void |
3055 | procfs_target::create_inferior (const char *exec_file, | |
3056 | const std::string &allargs, | |
3057 | char **env, int from_tty) | |
c906108c SS |
3058 | { |
3059 | char *shell_file = getenv ("SHELL"); | |
3060 | char *tryname; | |
28439f5e PA |
3061 | int pid; |
3062 | ||
c906108c SS |
3063 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
3064 | { | |
3065 | ||
3066 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
3067 | just do this the normal way (via execlp, which operates by |
3068 | attempting an exec for each element of the PATH until it | |
3069 | finds one which succeeds), then there will be an exec for | |
3070 | each failed attempt, each of which will cause a PR_SYSEXIT | |
3071 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
3072 | for these failed execs with the ones for successful execs | |
3073 | (whether the exec has succeeded is stored at that time in the | |
3074 | carry bit or some such architecture-specific and | |
3075 | non-ABI-specified place). | |
3076 | ||
3077 | So I can't think of anything better than to search the PATH | |
3078 | now. This has several disadvantages: (1) There is a race | |
3079 | condition; if we find a file now and it is deleted before we | |
3080 | exec it, we lose, even if the deletion leaves a valid file | |
3081 | further down in the PATH, (2) there is no way to know exactly | |
3082 | what an executable (in the sense of "capable of being | |
3083 | exec'd") file is. Using access() loses because it may lose | |
3084 | if the caller is the superuser; failing to use it loses if | |
3085 | there are ACLs or some such. */ | |
c906108c | 3086 | |
995816ba PA |
3087 | const char *p; |
3088 | const char *p1; | |
c906108c | 3089 | /* FIXME-maybe: might want "set path" command so user can change what |
c3f6f71d | 3090 | path is used from within GDB. */ |
995816ba | 3091 | const char *path = getenv ("PATH"); |
c906108c SS |
3092 | int len; |
3093 | struct stat statbuf; | |
3094 | ||
3095 | if (path == NULL) | |
3096 | path = "/bin:/usr/bin"; | |
3097 | ||
b196bc4c | 3098 | tryname = (char *) alloca (strlen (path) + strlen (shell_file) + 2); |
c3f6f71d | 3099 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
3100 | { |
3101 | p1 = strchr (p, ':'); | |
3102 | if (p1 != NULL) | |
3103 | len = p1 - p; | |
3104 | else | |
3105 | len = strlen (p); | |
3106 | strncpy (tryname, p, len); | |
3107 | tryname[len] = '\0'; | |
3108 | strcat (tryname, "/"); | |
3109 | strcat (tryname, shell_file); | |
3110 | if (access (tryname, X_OK) < 0) | |
3111 | continue; | |
3112 | if (stat (tryname, &statbuf) < 0) | |
3113 | continue; | |
3114 | if (!S_ISREG (statbuf.st_mode)) | |
3115 | /* We certainly need to reject directories. I'm not quite | |
3116 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
3117 | that people want to exec() these things. */ | |
3118 | continue; | |
3119 | break; | |
3120 | } | |
3121 | if (p == NULL) | |
3122 | /* Not found. This must be an error rather than merely passing | |
3123 | the file to execlp(), because execlp() would try all the | |
3124 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 3125 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 3126 | __LINE__, shell_file); |
c906108c SS |
3127 | |
3128 | shell_file = tryname; | |
3129 | } | |
3130 | ||
28439f5e | 3131 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 3132 | NULL, NULL, shell_file, NULL); |
28439f5e | 3133 | |
2090129c SDJ |
3134 | /* We have something that executes now. We'll be running through |
3135 | the shell at this point (if startup-with-shell is true), but the | |
3136 | pid shouldn't change. */ | |
3137 | add_thread_silent (pid_to_ptid (pid)); | |
3138 | ||
f6ac5f3d | 3139 | procfs_init_inferior (this, pid); |
27087a3d JB |
3140 | } |
3141 | ||
3142 | /* An observer for the "inferior_created" event. */ | |
c906108c | 3143 | |
27087a3d JB |
3144 | static void |
3145 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
3146 | { | |
c906108c SS |
3147 | } |
3148 | ||
e8032dde | 3149 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 3150 | |
c3f6f71d | 3151 | static int |
fba45db2 | 3152 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 3153 | { |
dfd4cc63 | 3154 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 3155 | |
2689673f | 3156 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 3157 | add_thread (gdb_threadid); |
c906108c | 3158 | |
c3f6f71d JM |
3159 | return 0; |
3160 | } | |
3161 | ||
77382aee PA |
3162 | /* Query all the threads that the target knows about, and give them |
3163 | back to GDB to add to its list. */ | |
c3f6f71d | 3164 | |
f6ac5f3d PA |
3165 | void |
3166 | procfs_target::update_thread_list () | |
c3f6f71d JM |
3167 | { |
3168 | procinfo *pi; | |
3169 | ||
e8032dde PA |
3170 | prune_threads (); |
3171 | ||
0df8b418 | 3172 | /* Find procinfo for main process. */ |
dfd4cc63 | 3173 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3174 | proc_update_threads (pi); |
3175 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
3176 | } |
3177 | ||
77382aee PA |
3178 | /* Return true if the thread is still 'alive'. This guy doesn't |
3179 | really seem to be doing his job. Got to investigate how to tell | |
3180 | when a thread is really gone. */ | |
c906108c | 3181 | |
f6ac5f3d PA |
3182 | int |
3183 | procfs_target::thread_alive (ptid_t ptid) | |
c906108c | 3184 | { |
c3f6f71d JM |
3185 | int proc, thread; |
3186 | procinfo *pi; | |
c906108c | 3187 | |
dfd4cc63 LM |
3188 | proc = ptid_get_pid (ptid); |
3189 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 3190 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
3191 | if ((pi = find_procinfo (proc, thread)) == NULL) |
3192 | return 0; | |
3193 | ||
3194 | /* If I can't get its status, it ain't alive! | |
3195 | What's more, I need to forget about it! */ | |
3196 | if (!proc_get_status (pi)) | |
3197 | { | |
3198 | destroy_procinfo (pi); | |
3199 | return 0; | |
3200 | } | |
77382aee PA |
3201 | /* I couldn't have got its status if it weren't alive, so it's |
3202 | alive. */ | |
c3f6f71d | 3203 | return 1; |
c906108c | 3204 | } |
c3f6f71d | 3205 | |
77382aee PA |
3206 | /* Convert PTID to a string. Returns the string in a static |
3207 | buffer. */ | |
c3f6f71d | 3208 | |
f6ac5f3d PA |
3209 | const char * |
3210 | procfs_target::pid_to_str (ptid_t ptid) | |
c3f6f71d JM |
3211 | { |
3212 | static char buf[80]; | |
c3f6f71d | 3213 | |
dfd4cc63 LM |
3214 | if (ptid_get_lwp (ptid) == 0) |
3215 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 3216 | else |
dfd4cc63 | 3217 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
3218 | |
3219 | return buf; | |
c3f6f71d JM |
3220 | } |
3221 | ||
77382aee | 3222 | /* Insert a watchpoint. */ |
c3f6f71d | 3223 | |
a0911fd0 | 3224 | static int |
39f77062 | 3225 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 3226 | int after) |
c906108c | 3227 | { |
c3f6f71d | 3228 | int pflags = 0; |
19958708 | 3229 | procinfo *pi; |
c3f6f71d | 3230 | |
dfd4cc63 LM |
3231 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
3232 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
3233 | 0); | |
c3f6f71d | 3234 | |
0df8b418 MS |
3235 | /* Translate from GDB's flags to /proc's. */ |
3236 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 3237 | { |
0df8b418 | 3238 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
3239 | case hw_write: /* default watchpoint (write) */ |
3240 | pflags = WRITE_WATCHFLAG; | |
3241 | break; | |
3242 | case hw_read: /* read watchpoint */ | |
3243 | pflags = READ_WATCHFLAG; | |
3244 | break; | |
3245 | case hw_access: /* access watchpoint */ | |
3246 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
3247 | break; | |
3248 | case hw_execute: /* execution HW breakpoint */ | |
3249 | pflags = EXEC_WATCHFLAG; | |
3250 | break; | |
0df8b418 | 3251 | default: /* Something weird. Return error. */ |
c906108c | 3252 | return -1; |
c3f6f71d | 3253 | } |
0df8b418 | 3254 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
3255 | pflags |= AFTER_WATCHFLAG; |
3256 | } | |
3257 | ||
3258 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
3259 | { | |
0df8b418 | 3260 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
3261 | return -1; /* fail */ |
3262 | /* GDB may try to remove the same watchpoint twice. | |
3263 | If a remove request returns no match, don't error. */ | |
c906108c | 3264 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
3265 | return 0; /* ignore */ |
3266 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c SS |
3267 | } |
3268 | return 0; | |
3269 | } | |
3270 | ||
1e03ad20 KB |
3271 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
3272 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
3273 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
3274 | far. | |
19958708 | 3275 | |
1e03ad20 KB |
3276 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
3277 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 3278 | target_can_use_hardware_watchpoint. */ |
1e03ad20 | 3279 | |
f6ac5f3d PA |
3280 | int |
3281 | procfs_target::can_use_hw_breakpoint (enum bptype type, int cnt, int othertype) | |
1e03ad20 | 3282 | { |
1e03ad20 KB |
3283 | /* Due to the way that proc_set_watchpoint() is implemented, host |
3284 | and target pointers must be of the same size. If they are not, | |
3285 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
3286 | fact that proc_set_watchpoint() calls |
3287 | procfs_address_to_host_pointer(); a close inspection of | |
3288 | procfs_address_to_host_pointer will reveal that an internal error | |
3289 | will be generated when the host and target pointer sizes are | |
3290 | different. */ | |
f5656ead | 3291 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 3292 | |
4e906f53 | 3293 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
3294 | return 0; |
3295 | ||
3296 | /* Other tests here??? */ | |
3297 | ||
3298 | return 1; | |
1e03ad20 KB |
3299 | } |
3300 | ||
77382aee PA |
3301 | /* Returns non-zero if process is stopped on a hardware watchpoint |
3302 | fault, else returns zero. */ | |
c3f6f71d | 3303 | |
f6ac5f3d PA |
3304 | int |
3305 | procfs_target::stopped_by_watchpoint () | |
c906108c | 3306 | { |
c3f6f71d | 3307 | procinfo *pi; |
c906108c | 3308 | |
dfd4cc63 | 3309 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 3310 | |
c3f6f71d | 3311 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3312 | { |
c3f6f71d | 3313 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 3314 | { |
c3f6f71d JM |
3315 | if (proc_what (pi) == FLTWATCH) |
3316 | return 1; | |
c3f6f71d | 3317 | } |
c906108c SS |
3318 | } |
3319 | return 0; | |
3320 | } | |
c906108c | 3321 | |
77382aee PA |
3322 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
3323 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
3324 | address. This function is only called if | |
3325 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
3326 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c | 3327 | |
f6ac5f3d PA |
3328 | int |
3329 | procfs_target::stopped_data_address (CORE_ADDR *addr) | |
bf701c2c PM |
3330 | { |
3331 | procinfo *pi; | |
3332 | ||
dfd4cc63 | 3333 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
3334 | return proc_watchpoint_address (pi, addr); |
3335 | } | |
3336 | ||
f6ac5f3d PA |
3337 | int |
3338 | procfs_target::insert_watchpoint (CORE_ADDR addr, int len, | |
3339 | enum target_hw_bp_type type, | |
3340 | struct expression *cond) | |
25513619 | 3341 | { |
d92524f1 | 3342 | if (!target_have_steppable_watchpoint |
f5656ead | 3343 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
3344 | { |
3345 | /* When a hardware watchpoint fires off the PC will be left at | |
3346 | the instruction following the one which caused the | |
3347 | watchpoint. It will *NOT* be necessary for GDB to step over | |
3348 | the watchpoint. */ | |
3349 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
3350 | } | |
3351 | else | |
3352 | { | |
3353 | /* When a hardware watchpoint fires off the PC will be left at | |
3354 | the instruction which caused the watchpoint. It will be | |
3355 | necessary for GDB to step over the watchpoint. */ | |
3356 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
3357 | } | |
3358 | } | |
3359 | ||
f6ac5f3d PA |
3360 | int |
3361 | procfs_target::remove_watchpoint (CORE_ADDR addr, int len, | |
3362 | enum target_hw_bp_type type, | |
3363 | struct expression *cond) | |
25513619 PA |
3364 | { |
3365 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
3366 | } | |
3367 | ||
f6ac5f3d PA |
3368 | int |
3369 | procfs_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
25513619 PA |
3370 | { |
3371 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
3372 | system can support "thousands" of hardware watchpoints, but gives | |
3373 | no method for finding out how many; It doesn't say anything about | |
3374 | the allowed size for the watched area either. So we just tell | |
3375 | GDB 'yes'. */ | |
3376 | return 1; | |
3377 | } | |
3378 | ||
77382aee PA |
3379 | /* Memory Mappings Functions: */ |
3380 | ||
3381 | /* Call a callback function once for each mapping, passing it the | |
3382 | mapping, an optional secondary callback function, and some optional | |
3383 | opaque data. Quit and return the first non-zero value returned | |
3384 | from the callback. | |
3385 | ||
3386 | PI is the procinfo struct for the process to be mapped. FUNC is | |
3387 | the callback function to be called by this iterator. DATA is the | |
3388 | optional opaque data to be passed to the callback function. | |
3389 | CHILD_FUNC is the optional secondary function pointer to be passed | |
3390 | to the child function. Returns the first non-zero return value | |
3391 | from the callback function, or zero. */ | |
831e682e MS |
3392 | |
3393 | static int | |
b8edc417 | 3394 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 3395 | void *data, |
19958708 | 3396 | int (*func) (struct prmap *map, |
b8edc417 | 3397 | find_memory_region_ftype child_func, |
831e682e MS |
3398 | void *data)) |
3399 | { | |
3400 | char pathname[MAX_PROC_NAME_SIZE]; | |
3401 | struct prmap *prmaps; | |
3402 | struct prmap *prmap; | |
3403 | int funcstat; | |
831e682e | 3404 | int nmap; |
831e682e | 3405 | struct stat sbuf; |
831e682e | 3406 | |
19958708 | 3407 | /* Get the number of mappings, allocate space, |
831e682e | 3408 | and read the mappings into prmaps. */ |
0df8b418 | 3409 | /* Open map fd. */ |
831e682e | 3410 | sprintf (pathname, "/proc/%d/map", pi->pid); |
831e682e | 3411 | |
5dc1a704 TT |
3412 | scoped_fd map_fd (open (pathname, O_RDONLY)); |
3413 | if (map_fd.get () < 0) | |
3414 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
831e682e | 3415 | |
19958708 | 3416 | /* Use stat to determine the file size, and compute |
831e682e | 3417 | the number of prmap_t objects it contains. */ |
5dc1a704 | 3418 | if (fstat (map_fd.get (), &sbuf) != 0) |
831e682e MS |
3419 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); |
3420 | ||
3421 | nmap = sbuf.st_size / sizeof (prmap_t); | |
3422 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5dc1a704 | 3423 | if (read (map_fd.get (), (char *) prmaps, nmap * sizeof (*prmaps)) |
831e682e MS |
3424 | != (nmap * sizeof (*prmaps))) |
3425 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
831e682e MS |
3426 | |
3427 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
3428 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5dc1a704 | 3429 | return funcstat; |
831e682e MS |
3430 | |
3431 | return 0; | |
3432 | } | |
3433 | ||
77382aee | 3434 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 3435 | function for each memory region. |
77382aee | 3436 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
3437 | |
3438 | static int | |
19958708 | 3439 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 3440 | find_memory_region_ftype func, void *data) |
be4d1333 | 3441 | { |
bf75638e | 3442 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 3443 | map->pr_size, |
be4d1333 MS |
3444 | (map->pr_mflags & MA_READ) != 0, |
3445 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 3446 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 3447 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
3448 | data); |
3449 | } | |
3450 | ||
77382aee PA |
3451 | /* External interface. Calls a callback function once for each |
3452 | mapped memory region in the child process, passing as arguments: | |
3453 | ||
3454 | CORE_ADDR virtual_address, | |
3455 | unsigned long size, | |
3456 | int read, TRUE if region is readable by the child | |
3457 | int write, TRUE if region is writable by the child | |
3458 | int execute TRUE if region is executable by the child. | |
3459 | ||
3460 | Stops iterating and returns the first non-zero value returned by | |
3461 | the callback. */ | |
be4d1333 | 3462 | |
f6ac5f3d PA |
3463 | int |
3464 | procfs_target::find_memory_regions (find_memory_region_ftype func, void *data) | |
be4d1333 | 3465 | { |
dfd4cc63 | 3466 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3467 | |
19958708 | 3468 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
3469 | find_memory_regions_callback); |
3470 | } | |
3471 | ||
77382aee | 3472 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 3473 | |
388faa48 | 3474 | static char * |
5ae5f592 | 3475 | mappingflags (long flags) |
388faa48 MS |
3476 | { |
3477 | static char asciiflags[8]; | |
3478 | ||
3479 | strcpy (asciiflags, "-------"); | |
388faa48 MS |
3480 | if (flags & MA_STACK) |
3481 | asciiflags[1] = 's'; | |
3482 | if (flags & MA_BREAK) | |
3483 | asciiflags[2] = 'b'; | |
3484 | if (flags & MA_SHARED) | |
3485 | asciiflags[3] = 's'; | |
3486 | if (flags & MA_READ) | |
3487 | asciiflags[4] = 'r'; | |
3488 | if (flags & MA_WRITE) | |
3489 | asciiflags[5] = 'w'; | |
3490 | if (flags & MA_EXEC) | |
3491 | asciiflags[6] = 'x'; | |
3492 | return (asciiflags); | |
3493 | } | |
3494 | ||
77382aee PA |
3495 | /* Callback function, does the actual work for 'info proc |
3496 | mappings'. */ | |
831e682e | 3497 | |
831e682e | 3498 | static int |
b8edc417 | 3499 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 3500 | void *unused) |
831e682e | 3501 | { |
0b62613e | 3502 | unsigned int pr_off; |
831e682e | 3503 | |
0b62613e | 3504 | pr_off = (unsigned int) map->pr_offset; |
0b62613e | 3505 | |
f5656ead | 3506 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 3507 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
3508 | (unsigned long) map->pr_vaddr, |
3509 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3510 | (unsigned long) map->pr_size, |
0b62613e PA |
3511 | pr_off, |
3512 | mappingflags (map->pr_mflags)); | |
3513 | else | |
f6a96b83 | 3514 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
3515 | (unsigned long) map->pr_vaddr, |
3516 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3517 | (unsigned long) map->pr_size, |
0b62613e PA |
3518 | pr_off, |
3519 | mappingflags (map->pr_mflags)); | |
831e682e MS |
3520 | |
3521 | return 0; | |
3522 | } | |
3523 | ||
77382aee | 3524 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
3525 | |
3526 | static void | |
3527 | info_proc_mappings (procinfo *pi, int summary) | |
3528 | { | |
388faa48 | 3529 | if (summary) |
0df8b418 | 3530 | return; /* No output for summary mode. */ |
388faa48 | 3531 | |
a3f17187 | 3532 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 3533 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
3534 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
3535 | "Start Addr", | |
3536 | " End Addr", | |
3537 | " Size", | |
3538 | " Offset", | |
3539 | "Flags"); | |
3540 | else | |
3541 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3542 | "Start Addr", | |
3543 | " End Addr", | |
3544 | " Size", | |
3545 | " Offset", | |
3546 | "Flags"); | |
388faa48 | 3547 | |
831e682e | 3548 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
3549 | printf_filtered ("\n"); |
3550 | } | |
3551 | ||
77382aee | 3552 | /* Implement the "info proc" command. */ |
c3f6f71d | 3553 | |
f6ac5f3d PA |
3554 | bool |
3555 | procfs_target::info_proc (const char *args, enum info_proc_what what) | |
c906108c | 3556 | { |
c3f6f71d | 3557 | struct cleanup *old_chain; |
388faa48 MS |
3558 | procinfo *process = NULL; |
3559 | procinfo *thread = NULL; | |
388faa48 MS |
3560 | char *tmp = NULL; |
3561 | int pid = 0; | |
3562 | int tid = 0; | |
3563 | int mappings = 0; | |
c906108c | 3564 | |
145b16a9 UW |
3565 | switch (what) |
3566 | { | |
3567 | case IP_MINIMAL: | |
3568 | break; | |
3569 | ||
3570 | case IP_MAPPINGS: | |
3571 | case IP_ALL: | |
3572 | mappings = 1; | |
3573 | break; | |
3574 | ||
3575 | default: | |
3576 | error (_("Not supported on this target.")); | |
3577 | } | |
3578 | ||
c3f6f71d | 3579 | old_chain = make_cleanup (null_cleanup, 0); |
773a1edc | 3580 | gdb_argv built_argv (args); |
4fa7574e | 3581 | for (char *arg : built_argv) |
c3f6f71d | 3582 | { |
773a1edc | 3583 | if (isdigit (arg[0])) |
c3f6f71d | 3584 | { |
773a1edc | 3585 | pid = strtoul (arg, &tmp, 10); |
c3f6f71d JM |
3586 | if (*tmp == '/') |
3587 | tid = strtoul (++tmp, NULL, 10); | |
3588 | } | |
773a1edc | 3589 | else if (arg[0] == '/') |
c3f6f71d | 3590 | { |
773a1edc | 3591 | tid = strtoul (arg + 1, NULL, 10); |
c3f6f71d | 3592 | } |
c3f6f71d JM |
3593 | } |
3594 | if (pid == 0) | |
dfd4cc63 | 3595 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 3596 | if (pid == 0) |
8a3fe4f8 | 3597 | error (_("No current process: you must name one.")); |
c3f6f71d | 3598 | else |
c906108c | 3599 | { |
c3f6f71d | 3600 | /* Have pid, will travel. |
0df8b418 | 3601 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
3602 | process = find_procinfo (pid, 0); |
3603 | if (process == NULL) | |
3604 | { | |
19958708 | 3605 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
3606 | remember to close it again when finished. */ |
3607 | process = create_procinfo (pid, 0); | |
004527cb | 3608 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
3609 | if (!open_procinfo_files (process, FD_CTL)) |
3610 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
3611 | } | |
c906108c | 3612 | } |
c3f6f71d JM |
3613 | if (tid != 0) |
3614 | thread = create_procinfo (pid, tid); | |
3615 | ||
3616 | if (process) | |
3617 | { | |
a3f17187 | 3618 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
3619 | proc_prettyprint_flags (proc_flags (process), 1); |
3620 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
3621 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
3622 | if (proc_get_nthreads (process) > 1) | |
19958708 | 3623 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
3624 | proc_get_nthreads (process)); |
3625 | } | |
3626 | if (thread) | |
3627 | { | |
a3f17187 | 3628 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
3629 | proc_prettyprint_flags (proc_flags (thread), 1); |
3630 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
3631 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
3632 | } | |
3633 | ||
388faa48 MS |
3634 | if (mappings) |
3635 | { | |
3636 | info_proc_mappings (process, 0); | |
3637 | } | |
3638 | ||
c3f6f71d | 3639 | do_cleanups (old_chain); |
f6ac5f3d PA |
3640 | |
3641 | return true; | |
c906108c SS |
3642 | } |
3643 | ||
9185ddce JB |
3644 | /* Modify the status of the system call identified by SYSCALLNUM in |
3645 | the set of syscalls that are currently traced/debugged. | |
3646 | ||
3647 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 3648 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 3649 | |
0df8b418 | 3650 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
3651 | will be disabled. */ |
3652 | ||
3653 | static void | |
3654 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 3655 | int mode, int from_tty) |
9185ddce JB |
3656 | { |
3657 | sysset_t *sysset; | |
77382aee | 3658 | |
9185ddce JB |
3659 | if (entry_or_exit == PR_SYSENTRY) |
3660 | sysset = proc_get_traced_sysentry (pi, NULL); | |
3661 | else | |
3662 | sysset = proc_get_traced_sysexit (pi, NULL); | |
3663 | ||
3664 | if (sysset == NULL) | |
3665 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
3666 | ||
3667 | if (mode == FLAG_SET) | |
44122162 | 3668 | praddset (sysset, syscallnum); |
9185ddce | 3669 | else |
44122162 | 3670 | prdelset (sysset, syscallnum); |
9185ddce JB |
3671 | |
3672 | if (entry_or_exit == PR_SYSENTRY) | |
3673 | { | |
3674 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 3675 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
3676 | } |
3677 | else | |
3678 | { | |
3679 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 3680 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
3681 | } |
3682 | } | |
3683 | ||
c3f6f71d | 3684 | static void |
0b39b52e | 3685 | proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 3686 | { |
c3f6f71d | 3687 | procinfo *pi; |
c906108c | 3688 | |
dfd4cc63 | 3689 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 3690 | error (_("you must be debugging a process to use this command.")); |
c906108c | 3691 | |
c3f6f71d | 3692 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 3693 | error_no_arg (_("system call to trace")); |
c3f6f71d | 3694 | |
dfd4cc63 | 3695 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3696 | if (isdigit (args[0])) |
3697 | { | |
9185ddce | 3698 | const int syscallnum = atoi (args); |
c906108c | 3699 | |
9185ddce | 3700 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
3701 | } |
3702 | } | |
3703 | ||
19958708 | 3704 | static void |
0b39b52e | 3705 | proc_trace_sysentry_cmd (const char *args, int from_tty) |
c906108c | 3706 | { |
c3f6f71d JM |
3707 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
3708 | } | |
c906108c | 3709 | |
19958708 | 3710 | static void |
0b39b52e | 3711 | proc_trace_sysexit_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3712 | { |
3713 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 3714 | } |
c906108c | 3715 | |
19958708 | 3716 | static void |
0b39b52e | 3717 | proc_untrace_sysentry_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3718 | { |
3719 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
3720 | } | |
3721 | ||
19958708 | 3722 | static void |
0b39b52e | 3723 | proc_untrace_sysexit_cmd (const char *args, int from_tty) |
c906108c | 3724 | { |
c3f6f71d JM |
3725 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
3726 | } | |
c906108c | 3727 | |
c906108c | 3728 | void |
fba45db2 | 3729 | _initialize_procfs (void) |
c906108c | 3730 | { |
76727919 | 3731 | gdb::observers::inferior_created.attach (procfs_inferior_created); |
27087a3d | 3732 | |
19958708 | 3733 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 3734 | _("Give a trace of entries into the syscall.")); |
19958708 | 3735 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 3736 | _("Give a trace of exits from the syscall.")); |
19958708 | 3737 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 3738 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 3739 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 3740 | _("Cancel a trace of exits from the syscall.")); |
c1955e17 | 3741 | |
f6ac5f3d | 3742 | add_target (&the_procfs_target); |
c3f6f71d JM |
3743 | } |
3744 | ||
3745 | /* =================== END, GDB "MODULE" =================== */ | |
3746 | ||
3747 | ||
3748 | ||
77382aee PA |
3749 | /* miscellaneous stubs: */ |
3750 | ||
3751 | /* The following satisfy a few random symbols mostly created by the | |
3752 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 3753 | |
77382aee PA |
3754 | /* Return a pid for which we guarantee we will be able to find a |
3755 | 'live' procinfo. */ | |
c3f6f71d | 3756 | |
39f77062 | 3757 | ptid_t |
fba45db2 | 3758 | procfs_first_available (void) |
c3f6f71d | 3759 | { |
39f77062 | 3760 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 3761 | } |
be4d1333 MS |
3762 | |
3763 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
3764 | ||
3765 | static char * | |
19958708 | 3766 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 3767 | char *note_data, int *note_size, |
2ea28649 | 3768 | enum gdb_signal stop_signal) |
be4d1333 | 3769 | { |
594f7785 | 3770 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
3771 | gdb_gregset_t gregs; |
3772 | gdb_fpregset_t fpregs; | |
3773 | unsigned long merged_pid; | |
3774 | ||
dfd4cc63 | 3775 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 3776 | |
75125405 DJ |
3777 | /* This part is the old method for fetching registers. |
3778 | It should be replaced by the newer one using regsets | |
3779 | once it is implemented in this platform: | |
29082443 | 3780 | gdbarch_iterate_over_regset_sections(). */ |
75125405 | 3781 | |
2989a365 | 3782 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
75125405 DJ |
3783 | inferior_ptid = ptid; |
3784 | target_fetch_registers (regcache, -1); | |
3785 | ||
594f7785 | 3786 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
3787 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
3788 | note_data, | |
3789 | note_size, | |
19958708 | 3790 | merged_pid, |
65554fef MS |
3791 | stop_signal, |
3792 | &gregs); | |
594f7785 | 3793 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
3794 | note_data = (char *) elfcore_write_prfpreg (obfd, |
3795 | note_data, | |
3796 | note_size, | |
3797 | &fpregs, | |
3798 | sizeof (fpregs)); | |
75125405 | 3799 | |
be4d1333 MS |
3800 | return note_data; |
3801 | } | |
3802 | ||
3803 | struct procfs_corefile_thread_data { | |
3804 | bfd *obfd; | |
3805 | char *note_data; | |
3806 | int *note_size; | |
2ea28649 | 3807 | enum gdb_signal stop_signal; |
be4d1333 MS |
3808 | }; |
3809 | ||
3810 | static int | |
65554fef | 3811 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 | 3812 | { |
b196bc4c RO |
3813 | struct procfs_corefile_thread_data *args |
3814 | = (struct procfs_corefile_thread_data *) data; | |
be4d1333 | 3815 | |
2689673f | 3816 | if (pi != NULL) |
be4d1333 | 3817 | { |
dfd4cc63 | 3818 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 3819 | |
75125405 | 3820 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 3821 | args->note_data, |
2020b7ab PA |
3822 | args->note_size, |
3823 | args->stop_signal); | |
be4d1333 MS |
3824 | } |
3825 | return 0; | |
3826 | } | |
3827 | ||
a223f1e7 JB |
3828 | static int |
3829 | find_signalled_thread (struct thread_info *info, void *data) | |
3830 | { | |
a493e3e2 | 3831 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
3832 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
3833 | return 1; | |
3834 | ||
3835 | return 0; | |
3836 | } | |
3837 | ||
2ea28649 | 3838 | static enum gdb_signal |
a223f1e7 JB |
3839 | find_stop_signal (void) |
3840 | { | |
3841 | struct thread_info *info = | |
3842 | iterate_over_threads (find_signalled_thread, NULL); | |
3843 | ||
3844 | if (info) | |
16c381f0 | 3845 | return info->suspend.stop_signal; |
a223f1e7 | 3846 | else |
a493e3e2 | 3847 | return GDB_SIGNAL_0; |
a223f1e7 JB |
3848 | } |
3849 | ||
f6ac5f3d PA |
3850 | char * |
3851 | procfs_target::make_corefile_notes (bfd *obfd, int *note_size) | |
be4d1333 MS |
3852 | { |
3853 | struct cleanup *old_chain; | |
3854 | gdb_gregset_t gregs; | |
3855 | gdb_fpregset_t fpregs; | |
3856 | char fname[16] = {'\0'}; | |
3857 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 3858 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3859 | char *note_data = NULL; |
6dbdc4a3 | 3860 | char *inf_args; |
be4d1333 | 3861 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 3862 | gdb_byte *auxv; |
4e73f23d | 3863 | int auxv_len; |
2ea28649 | 3864 | enum gdb_signal stop_signal; |
be4d1333 MS |
3865 | |
3866 | if (get_exec_file (0)) | |
3867 | { | |
9f37bbcc | 3868 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
3869 | fname[sizeof (fname) - 1] = 0; |
3870 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
3871 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
3872 | |
3873 | inf_args = get_inferior_args (); | |
3874 | if (inf_args && *inf_args && | |
3875 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 3876 | { |
19958708 | 3877 | strncat (psargs, " ", |
be4d1333 | 3878 | sizeof (psargs) - strlen (psargs)); |
19958708 | 3879 | strncat (psargs, inf_args, |
be4d1333 MS |
3880 | sizeof (psargs) - strlen (psargs)); |
3881 | } | |
3882 | } | |
3883 | ||
19958708 RM |
3884 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
3885 | note_data, | |
3886 | note_size, | |
3887 | fname, | |
be4d1333 MS |
3888 | psargs); |
3889 | ||
651c8d2d PA |
3890 | stop_signal = find_stop_signal (); |
3891 | ||
3e3420f6 PA |
3892 | fill_gregset (get_current_regcache (), &gregs, -1); |
3893 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 3894 | ptid_get_pid (inferior_ptid), |
3e3420f6 | 3895 | stop_signal, &gregs); |
3e3420f6 | 3896 | |
be4d1333 MS |
3897 | thread_args.obfd = obfd; |
3898 | thread_args.note_data = note_data; | |
3899 | thread_args.note_size = note_size; | |
651c8d2d | 3900 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
3901 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
3902 | &thread_args); | |
2689673f | 3903 | note_data = thread_args.note_data; |
be4d1333 | 3904 | |
f6ac5f3d | 3905 | auxv_len = target_read_alloc (target_stack, TARGET_OBJECT_AUXV, |
13547ab6 | 3906 | NULL, &auxv); |
4e73f23d RM |
3907 | if (auxv_len > 0) |
3908 | { | |
3909 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
3910 | "CORE", NT_AUXV, auxv, auxv_len); | |
3911 | xfree (auxv); | |
3912 | } | |
3913 | ||
be4d1333 MS |
3914 | return note_data; |
3915 | } | |
be4d1333 | 3916 | /* =================== END GCORE .NOTE "MODULE" =================== */ |