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44122162 | 1 | /* Machine independent support for Solaris /proc (process file system) for GDB. |
2555fe1a | 2 | |
61baf725 | 3 | Copyright (C) 1999-2017 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" |
27087a3d | 48 | #include "observer.h" |
0fda6bd2 | 49 | |
77382aee PA |
50 | /* This module provides the interface between GDB and the |
51 | /proc file system, which is used on many versions of Unix | |
52 | as a means for debuggers to control other processes. | |
53 | ||
77382aee PA |
54 | /proc works by imitating a file system: you open a simulated file |
55 | that represents the process you wish to interact with, and perform | |
56 | operations on that "file" in order to examine or change the state | |
57 | of the other process. | |
58 | ||
59 | The most important thing to know about /proc and this module is | |
60 | that there are two very different interfaces to /proc: | |
61 | ||
62 | One that uses the ioctl system call, and another that uses read | |
63 | and write system calls. | |
64 | ||
44122162 RO |
65 | This module supports only the Solaris version of the read/write |
66 | interface. */ | |
77382aee | 67 | |
c906108c | 68 | #include <sys/types.h> |
2978b111 | 69 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
c906108c | 70 | |
c3f6f71d JM |
71 | #include <fcntl.h> /* for O_RDONLY */ |
72 | #include <unistd.h> /* for "X_OK" */ | |
53ce3c39 | 73 | #include <sys/stat.h> /* for struct stat */ |
c906108c | 74 | |
103b3ef5 MS |
75 | /* Note: procfs-utils.h must be included after the above system header |
76 | files, because it redefines various system calls using macros. | |
77 | This may be incompatible with the prototype declarations. */ | |
78 | ||
103b3ef5 MS |
79 | #include "proc-utils.h" |
80 | ||
77382aee | 81 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
82 | #include "gregset.h" |
83 | ||
c3f6f71d | 84 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 85 | |
77382aee | 86 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 87 | |
c0939df1 | 88 | static void procfs_attach (struct target_ops *, const char *, int); |
52554a0e | 89 | static void procfs_detach (struct target_ops *, const char *, int); |
28439f5e | 90 | static void procfs_resume (struct target_ops *, |
2ea28649 | 91 | ptid_t, int, enum gdb_signal); |
bfedc46a | 92 | static void procfs_interrupt (struct target_ops *self, ptid_t); |
a14ed312 | 93 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
94 | static void procfs_fetch_registers (struct target_ops *, |
95 | struct regcache *, int); | |
96 | static void procfs_store_registers (struct target_ops *, | |
97 | struct regcache *, int); | |
94bedb42 TT |
98 | static void procfs_pass_signals (struct target_ops *self, |
99 | int, unsigned char *); | |
7d85a9c0 | 100 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 101 | static void procfs_mourn_inferior (struct target_ops *ops); |
5f2ad7a3 RO |
102 | static void procfs_create_inferior (struct target_ops *, const char *, |
103 | const std::string &, char **, int); | |
117de6a9 | 104 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 105 | ptid_t, struct target_waitstatus *, int); |
e96027e0 PA |
106 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
107 | const gdb_byte *, | |
108 | ULONGEST, ULONGEST, | |
109 | ULONGEST *); | |
4ac248ca | 110 | static target_xfer_partial_ftype procfs_xfer_partial; |
a14ed312 | 111 | |
28439f5e | 112 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 113 | |
e8032dde | 114 | static void procfs_update_thread_list (struct target_ops *ops); |
7a114964 | 115 | static const char *procfs_pid_to_str (struct target_ops *, ptid_t); |
c3f6f71d | 116 | |
2e73927c TT |
117 | static int proc_find_memory_regions (struct target_ops *self, |
118 | find_memory_region_ftype, void *); | |
be4d1333 | 119 | |
44122162 RO |
120 | static char *procfs_make_note_section (struct target_ops *self, |
121 | bfd *, int *); | |
be4d1333 | 122 | |
5461485a | 123 | static int procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f | 124 | enum bptype, int, int); |
1e03ad20 | 125 | |
7bc112c1 | 126 | static void procfs_info_proc (struct target_ops *, const char *, |
145b16a9 UW |
127 | enum info_proc_what); |
128 | ||
c47ffbe3 | 129 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
130 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
131 | is presented in 64-bit format. We need to provide a custom parser | |
132 | to handle that. */ | |
c47ffbe3 VP |
133 | static int |
134 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
77382aee | 135 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
c47ffbe3 | 136 | { |
f5656ead | 137 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
138 | gdb_byte *ptr = *readptr; |
139 | ||
140 | if (endptr == ptr) | |
141 | return 0; | |
77382aee | 142 | |
c47ffbe3 VP |
143 | if (endptr - ptr < 8 * 2) |
144 | return -1; | |
145 | ||
e17a4113 | 146 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
147 | ptr += 8; |
148 | /* The size of data is always 64-bit. If the application is 32-bit, | |
149 | it will be zero extended, as expected. */ | |
e17a4113 | 150 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
151 | ptr += 8; |
152 | ||
153 | *readptr = ptr; | |
154 | return 1; | |
155 | } | |
156 | #endif | |
157 | ||
d1a7880c | 158 | struct target_ops * |
28439f5e | 159 | procfs_target (void) |
c3f6f71d | 160 | { |
28439f5e PA |
161 | struct target_ops *t = inf_child_target (); |
162 | ||
77382aee PA |
163 | t->to_create_inferior = procfs_create_inferior; |
164 | t->to_kill = procfs_kill_inferior; | |
165 | t->to_mourn_inferior = procfs_mourn_inferior; | |
166 | t->to_attach = procfs_attach; | |
167 | t->to_detach = procfs_detach; | |
168 | t->to_wait = procfs_wait; | |
169 | t->to_resume = procfs_resume; | |
170 | t->to_fetch_registers = procfs_fetch_registers; | |
171 | t->to_store_registers = procfs_store_registers; | |
172 | t->to_xfer_partial = procfs_xfer_partial; | |
2455069d | 173 | t->to_pass_signals = procfs_pass_signals; |
77382aee | 174 | t->to_files_info = procfs_files_info; |
bfedc46a | 175 | t->to_interrupt = procfs_interrupt; |
28439f5e | 176 | |
e8032dde | 177 | t->to_update_thread_list = procfs_update_thread_list; |
77382aee PA |
178 | t->to_thread_alive = procfs_thread_alive; |
179 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 180 | |
77382aee | 181 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
182 | t->to_find_memory_regions = proc_find_memory_regions; |
183 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 184 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
185 | |
186 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 187 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
188 | #endif |
189 | ||
77382aee | 190 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
191 | |
192 | return t; | |
c3f6f71d | 193 | } |
c906108c | 194 | |
c3f6f71d JM |
195 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
196 | ||
77382aee PA |
197 | /* World Unification: |
198 | ||
199 | Put any typedefs, defines etc. here that are required for the | |
200 | unification of code that handles different versions of /proc. */ | |
c3f6f71d | 201 | |
44122162 RO |
202 | enum { READ_WATCHFLAG = WA_READ, |
203 | WRITE_WATCHFLAG = WA_WRITE, | |
204 | EXEC_WATCHFLAG = WA_EXEC, | |
205 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
206 | }; | |
c3f6f71d JM |
207 | |
208 | ||
209 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
210 | ||
211 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
212 | ||
213 | /* The procinfo struct is a wrapper to hold all the state information | |
214 | concerning a /proc process. There should be exactly one procinfo | |
215 | for each process, and since GDB currently can debug only one | |
216 | process at a time, that means there should be only one procinfo. | |
217 | All of the LWP's of a process can be accessed indirectly thru the | |
218 | single process procinfo. | |
219 | ||
220 | However, against the day when GDB may debug more than one process, | |
221 | this data structure is kept in a list (which for now will hold no | |
222 | more than one member), and many functions will have a pointer to a | |
223 | procinfo as an argument. | |
224 | ||
225 | There will be a separate procinfo structure for use by the (not yet | |
226 | implemented) "info proc" command, so that we can print useful | |
227 | information about any random process without interfering with the | |
0df8b418 | 228 | inferior's procinfo information. */ |
c3f6f71d | 229 | |
c3f6f71d | 230 | /* format strings for /proc paths */ |
44122162 RO |
231 | #define MAIN_PROC_NAME_FMT "/proc/%d" |
232 | #define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
233 | #define AS_PROC_NAME_FMT "/proc/%d/as" | |
234 | #define MAP_PROC_NAME_FMT "/proc/%d/map" | |
235 | #define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
236 | #define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
c906108c | 237 | |
c3f6f71d JM |
238 | typedef struct procinfo { |
239 | struct procinfo *next; | |
240 | int pid; /* Process ID */ | |
241 | int tid; /* Thread/LWP id */ | |
c906108c | 242 | |
c3f6f71d JM |
243 | /* process state */ |
244 | int was_stopped; | |
245 | int ignore_next_sigstop; | |
c906108c | 246 | |
c3f6f71d | 247 | int ctl_fd; /* File descriptor for /proc control file */ |
c3f6f71d JM |
248 | int status_fd; /* File descriptor for /proc status file */ |
249 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 250 | |
c3f6f71d | 251 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 252 | |
c3f6f71d | 253 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
44122162 RO |
254 | sigset_t saved_sigset; /* Saved traced signal set */ |
255 | sigset_t saved_sighold; /* Saved held signal set */ | |
37de36c6 KB |
256 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
257 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 258 | |
44122162 | 259 | pstatus_t prstatus; /* Current process status info */ |
19958708 | 260 | |
c3f6f71d | 261 | struct procinfo *thread_list; |
c906108c | 262 | |
c3f6f71d JM |
263 | int status_valid : 1; |
264 | int gregs_valid : 1; | |
265 | int fpregs_valid : 1; | |
266 | int threads_valid: 1; | |
267 | } procinfo; | |
c906108c | 268 | |
c3f6f71d | 269 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 270 | |
c3f6f71d | 271 | /* Function prototypes for procinfo module: */ |
c906108c | 272 | |
a14ed312 KB |
273 | static procinfo *find_procinfo_or_die (int pid, int tid); |
274 | static procinfo *find_procinfo (int pid, int tid); | |
275 | static procinfo *create_procinfo (int pid, int tid); | |
44122162 | 276 | static void destroy_procinfo (procinfo *p); |
004527cb | 277 | static void do_destroy_procinfo_cleanup (void *); |
44122162 RO |
278 | static void dead_procinfo (procinfo *p, const char *msg, int killp); |
279 | static int open_procinfo_files (procinfo *p, int which); | |
280 | static void close_procinfo_files (procinfo *p); | |
281 | static sysset_t *sysset_t_alloc (procinfo *pi); | |
c906108c | 282 | |
e9ef4f39 | 283 | static int iterate_over_mappings |
b8edc417 JK |
284 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
285 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 286 | void *data)); |
e9ef4f39 | 287 | |
c3f6f71d | 288 | /* The head of the procinfo list: */ |
44122162 | 289 | static procinfo *procinfo_list; |
c906108c | 290 | |
77382aee PA |
291 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
292 | not found. */ | |
c906108c | 293 | |
19958708 | 294 | static procinfo * |
fba45db2 | 295 | find_procinfo (int pid, int tid) |
c5aa993b | 296 | { |
c3f6f71d | 297 | procinfo *pi; |
c906108c | 298 | |
c3f6f71d JM |
299 | for (pi = procinfo_list; pi; pi = pi->next) |
300 | if (pi->pid == pid) | |
301 | break; | |
c906108c | 302 | |
c3f6f71d JM |
303 | if (pi) |
304 | if (tid) | |
305 | { | |
306 | /* Don't check threads_valid. If we're updating the | |
307 | thread_list, we want to find whatever threads are already | |
308 | here. This means that in general it is the caller's | |
309 | responsibility to check threads_valid and update before | |
310 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 311 | thread. */ |
c3f6f71d JM |
312 | |
313 | for (pi = pi->thread_list; pi; pi = pi->next) | |
314 | if (pi->tid == tid) | |
315 | break; | |
316 | } | |
c906108c | 317 | |
c3f6f71d JM |
318 | return pi; |
319 | } | |
c906108c | 320 | |
77382aee | 321 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 322 | |
c3f6f71d | 323 | static procinfo * |
fba45db2 | 324 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
325 | { |
326 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 327 | |
c3f6f71d | 328 | if (pi == NULL) |
0fda6bd2 JM |
329 | { |
330 | if (tid) | |
3e43a32a MS |
331 | error (_("procfs: couldn't find pid %d " |
332 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
333 | pid, tid); |
334 | else | |
8a3fe4f8 | 335 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 336 | } |
c3f6f71d JM |
337 | return pi; |
338 | } | |
c906108c | 339 | |
77382aee PA |
340 | /* Wrapper for `open'. The appropriate open call is attempted; if |
341 | unsuccessful, it will be retried as many times as needed for the | |
342 | EAGAIN and EINTR conditions. | |
19958708 | 343 | |
77382aee PA |
344 | For other conditions, retry the open a limited number of times. In |
345 | addition, a short sleep is imposed prior to retrying the open. The | |
346 | reason for this sleep is to give the kernel a chance to catch up | |
347 | and create the file in question in the event that GDB "wins" the | |
348 | race to open a file before the kernel has created it. */ | |
19958708 | 349 | |
4d1bcd09 KB |
350 | static int |
351 | open_with_retry (const char *pathname, int flags) | |
352 | { | |
353 | int retries_remaining, status; | |
354 | ||
355 | retries_remaining = 2; | |
356 | ||
357 | while (1) | |
358 | { | |
359 | status = open (pathname, flags); | |
360 | ||
361 | if (status >= 0 || retries_remaining == 0) | |
362 | break; | |
363 | else if (errno != EINTR && errno != EAGAIN) | |
364 | { | |
365 | retries_remaining--; | |
366 | sleep (1); | |
367 | } | |
368 | } | |
369 | ||
370 | return status; | |
371 | } | |
372 | ||
44122162 RO |
373 | /* Open the file descriptor for the process or LWP. We only open the |
374 | control file descriptor; the others are opened lazily as needed. | |
77382aee | 375 | Returns the file descriptor, or zero for failure. */ |
c906108c | 376 | |
c3f6f71d | 377 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 378 | |
c3f6f71d | 379 | static int |
fba45db2 | 380 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d JM |
381 | { |
382 | char tmp[MAX_PROC_NAME_SIZE]; | |
383 | int fd; | |
384 | ||
77382aee PA |
385 | /* This function is getting ALMOST long enough to break up into |
386 | several. Here is some rationale: | |
387 | ||
77382aee PA |
388 | There are several file descriptors that may need to be open |
389 | for any given process or LWP. The ones we're intereted in are: | |
390 | - control (ctl) write-only change the state | |
391 | - status (status) read-only query the state | |
392 | - address space (as) read/write access memory | |
393 | - map (map) read-only virtual addr map | |
394 | Most of these are opened lazily as they are needed. | |
395 | The pathnames for the 'files' for an LWP look slightly | |
396 | different from those of a first-class process: | |
397 | Pathnames for a process (<proc-id>): | |
398 | /proc/<proc-id>/ctl | |
399 | /proc/<proc-id>/status | |
400 | /proc/<proc-id>/as | |
401 | /proc/<proc-id>/map | |
402 | Pathnames for an LWP (lwp-id): | |
403 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
404 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
405 | An LWP has no map or address space file descriptor, since | |
44122162 RO |
406 | the memory map and address space are shared by all LWPs. */ |
407 | ||
77382aee PA |
408 | /* In this case, there are several different file descriptors that |
409 | we might be asked to open. The control file descriptor will be | |
410 | opened early, but the others will be opened lazily as they are | |
411 | needed. */ | |
c3f6f71d JM |
412 | |
413 | strcpy (tmp, pi->pathname); | |
0df8b418 | 414 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
415 | case FD_CTL: |
416 | if (pi->tid) | |
417 | strcat (tmp, "/lwpctl"); | |
418 | else | |
419 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 420 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 421 | if (fd < 0) |
c3f6f71d JM |
422 | return 0; /* fail */ |
423 | pi->ctl_fd = fd; | |
424 | break; | |
425 | case FD_AS: | |
426 | if (pi->tid) | |
0df8b418 | 427 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 428 | strcat (tmp, "/as"); |
4d1bcd09 | 429 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 430 | if (fd < 0) |
c3f6f71d JM |
431 | return 0; /* fail */ |
432 | pi->as_fd = fd; | |
433 | break; | |
434 | case FD_STATUS: | |
435 | if (pi->tid) | |
436 | strcat (tmp, "/lwpstatus"); | |
437 | else | |
438 | strcat (tmp, "/status"); | |
4d1bcd09 | 439 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 440 | if (fd < 0) |
c3f6f71d JM |
441 | return 0; /* fail */ |
442 | pi->status_fd = fd; | |
443 | break; | |
444 | default: | |
445 | return 0; /* unknown file descriptor */ | |
446 | } | |
c906108c | 447 | |
c3f6f71d JM |
448 | return 1; /* success */ |
449 | } | |
c906108c | 450 | |
77382aee PA |
451 | /* Allocate a data structure and link it into the procinfo list. |
452 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
453 | pointer to new procinfo struct. */ | |
c906108c | 454 | |
c3f6f71d | 455 | static procinfo * |
fba45db2 | 456 | create_procinfo (int pid, int tid) |
c3f6f71d | 457 | { |
0b62613e | 458 | procinfo *pi, *parent = NULL; |
c906108c | 459 | |
0d06e24b | 460 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 461 | return pi; /* Already exists, nothing to do. */ |
c906108c | 462 | |
0df8b418 | 463 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
464 | if (tid != 0) |
465 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
466 | create it if it | |
0df8b418 | 467 | doesn't exist yet? */ |
c906108c | 468 | |
8d749320 | 469 | pi = XNEW (procinfo); |
c3f6f71d JM |
470 | memset (pi, 0, sizeof (procinfo)); |
471 | pi->pid = pid; | |
472 | pi->tid = tid; | |
c906108c | 473 | |
1d5e0602 KB |
474 | pi->saved_entryset = sysset_t_alloc (pi); |
475 | pi->saved_exitset = sysset_t_alloc (pi); | |
476 | ||
c3f6f71d JM |
477 | /* Chain into list. */ |
478 | if (tid == 0) | |
479 | { | |
480 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
481 | pi->next = procinfo_list; | |
482 | procinfo_list = pi; | |
483 | } | |
484 | else | |
485 | { | |
c3f6f71d | 486 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); |
c3f6f71d JM |
487 | pi->next = parent->thread_list; |
488 | parent->thread_list = pi; | |
489 | } | |
490 | return pi; | |
491 | } | |
c906108c | 492 | |
77382aee | 493 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 494 | |
c3f6f71d | 495 | static void |
fba45db2 | 496 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
497 | { |
498 | if (pi->ctl_fd > 0) | |
499 | close (pi->ctl_fd); | |
c3f6f71d JM |
500 | if (pi->as_fd > 0) |
501 | close (pi->as_fd); | |
502 | if (pi->status_fd > 0) | |
503 | close (pi->status_fd); | |
c3f6f71d JM |
504 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
505 | } | |
c906108c | 506 | |
77382aee | 507 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 508 | |
c3f6f71d | 509 | static void |
fba45db2 | 510 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
511 | { |
512 | procinfo *ptr; | |
513 | ||
77382aee | 514 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
515 | if (pi == *list) |
516 | *list = pi->next; | |
19958708 | 517 | else |
c3f6f71d JM |
518 | for (ptr = *list; ptr; ptr = ptr->next) |
519 | if (ptr->next == pi) | |
520 | { | |
521 | ptr->next = pi->next; | |
522 | break; | |
523 | } | |
7a292a7a | 524 | |
77382aee | 525 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 526 | close_procinfo_files (pi); |
7a292a7a | 527 | |
77382aee | 528 | /* Step three: free the memory. */ |
1d5e0602 KB |
529 | xfree (pi->saved_entryset); |
530 | xfree (pi->saved_exitset); | |
b8c9b27d | 531 | xfree (pi); |
c3f6f71d | 532 | } |
c906108c | 533 | |
c3f6f71d | 534 | static void |
fba45db2 | 535 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
536 | { |
537 | procinfo *tmp; | |
c906108c | 538 | |
0df8b418 | 539 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 540 | { |
0df8b418 | 541 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
542 | destroy_one_procinfo (&tmp->thread_list, pi); |
543 | } | |
0df8b418 | 544 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
545 | { |
546 | /* First destroy the children, if any; */ | |
547 | while (pi->thread_list != NULL) | |
548 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
549 | /* Then destroy the parent. Genocide!!! */ | |
550 | destroy_one_procinfo (&procinfo_list, pi); | |
551 | } | |
552 | } | |
c906108c | 553 | |
004527cb AC |
554 | static void |
555 | do_destroy_procinfo_cleanup (void *pi) | |
556 | { | |
b196bc4c | 557 | destroy_procinfo ((procinfo *) pi); |
004527cb AC |
558 | } |
559 | ||
c3f6f71d | 560 | enum { NOKILL, KILL }; |
c906108c | 561 | |
77382aee PA |
562 | /* To be called on a non_recoverable error for a procinfo. Prints |
563 | error messages, optionally sends a SIGKILL to the process, then | |
564 | destroys the data structure. */ | |
c906108c | 565 | |
c3f6f71d | 566 | static void |
995816ba | 567 | dead_procinfo (procinfo *pi, const char *msg, int kill_p) |
c3f6f71d JM |
568 | { |
569 | char procfile[80]; | |
c906108c | 570 | |
c3f6f71d JM |
571 | if (pi->pathname) |
572 | { | |
573 | print_sys_errmsg (pi->pathname, errno); | |
574 | } | |
575 | else | |
576 | { | |
577 | sprintf (procfile, "process %d", pi->pid); | |
578 | print_sys_errmsg (procfile, errno); | |
579 | } | |
580 | if (kill_p == KILL) | |
581 | kill (pi->pid, SIGKILL); | |
c906108c | 582 | |
c3f6f71d | 583 | destroy_procinfo (pi); |
0b62613e | 584 | error ("%s", msg); |
c3f6f71d | 585 | } |
c906108c | 586 | |
77382aee | 587 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
588 | |
589 | static sysset_t * | |
44122162 | 590 | sysset_t_alloc (procinfo *pi) |
37de36c6 | 591 | { |
44122162 | 592 | return (sysset_t *) xmalloc (sizeof (sysset_t)); |
37de36c6 KB |
593 | } |
594 | ||
c3f6f71d | 595 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 596 | |
c3f6f71d | 597 | /* =================== /proc "MODULE" =================== */ |
c906108c | 598 | |
77382aee PA |
599 | /* This "module" is the interface layer between the /proc system API |
600 | and the gdb target vector functions. This layer consists of access | |
601 | functions that encapsulate each of the basic operations that we | |
602 | need to use from the /proc API. | |
603 | ||
604 | The main motivation for this layer is to hide the fact that there | |
605 | are two very different implementations of the /proc API. Rather | |
606 | than have a bunch of #ifdefs all thru the gdb target vector | |
607 | functions, we do our best to hide them all in here. */ | |
c906108c | 608 | |
44122162 RO |
609 | static long proc_flags (procinfo *pi); |
610 | static int proc_why (procinfo *pi); | |
611 | static int proc_what (procinfo *pi); | |
612 | static int proc_set_current_signal (procinfo *pi, int signo); | |
613 | static int proc_get_current_thread (procinfo *pi); | |
d3581e61 | 614 | static int proc_iterate_over_threads |
44122162 | 615 | (procinfo *pi, |
d3581e61 JB |
616 | int (*func) (procinfo *, procinfo *, void *), |
617 | void *ptr); | |
618 | ||
619 | static void | |
995816ba | 620 | proc_warn (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
621 | { |
622 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
623 | print_sys_errmsg (errmsg, errno); | |
624 | } | |
c906108c | 625 | |
d3581e61 | 626 | static void |
995816ba | 627 | proc_error (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
628 | { |
629 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
630 | perror_with_name (errmsg); | |
631 | } | |
c906108c | 632 | |
77382aee PA |
633 | /* Updates the status struct in the procinfo. There is a 'valid' |
634 | flag, to let other functions know when this function needs to be | |
635 | called (so the status is only read when it is needed). The status | |
636 | file descriptor is also only opened when it is needed. Returns | |
637 | non-zero for success, zero for failure. */ | |
c906108c | 638 | |
d3581e61 | 639 | static int |
fba45db2 | 640 | proc_get_status (procinfo *pi) |
c3f6f71d | 641 | { |
0df8b418 | 642 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
643 | if (pi->status_fd == 0 && |
644 | open_procinfo_files (pi, FD_STATUS) == 0) | |
645 | { | |
646 | pi->status_valid = 0; | |
647 | return 0; | |
648 | } | |
c906108c | 649 | |
c3f6f71d JM |
650 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
651 | pi->status_valid = 0; /* fail */ | |
652 | else | |
653 | { | |
19958708 | 654 | /* Sigh... I have to read a different data structure, |
0df8b418 | 655 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 656 | if (pi->tid) |
19958708 RM |
657 | pi->status_valid = (read (pi->status_fd, |
658 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
659 | sizeof (lwpstatus_t)) |
660 | == sizeof (lwpstatus_t)); | |
661 | else | |
662 | { | |
19958708 | 663 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d | 664 | (char *) &pi->prstatus, |
44122162 RO |
665 | sizeof (pstatus_t)) |
666 | == sizeof (pstatus_t)); | |
c3f6f71d JM |
667 | } |
668 | } | |
c906108c | 669 | |
c3f6f71d JM |
670 | if (pi->status_valid) |
671 | { | |
19958708 | 672 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 673 | proc_why (pi), |
19958708 | 674 | proc_what (pi), |
c3f6f71d JM |
675 | proc_get_current_thread (pi)); |
676 | } | |
c906108c | 677 | |
77382aee | 678 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d | 679 | pi->gregs_valid = pi->status_valid; |
77382aee PA |
680 | /* In the read/write multiple-fd model, the status struct includes |
681 | the fp regs too, so mark them valid too. */ | |
c3f6f71d | 682 | pi->fpregs_valid = pi->status_valid; |
77382aee | 683 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 684 | } |
c906108c | 685 | |
77382aee | 686 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 687 | |
d3581e61 | 688 | static long |
fba45db2 | 689 | proc_flags (procinfo *pi) |
c3f6f71d JM |
690 | { |
691 | if (!pi->status_valid) | |
692 | if (!proc_get_status (pi)) | |
0df8b418 | 693 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 694 | |
c3f6f71d | 695 | return pi->prstatus.pr_lwp.pr_flags; |
c3f6f71d | 696 | } |
c906108c | 697 | |
77382aee | 698 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 699 | |
d3581e61 | 700 | static int |
fba45db2 | 701 | proc_why (procinfo *pi) |
c3f6f71d JM |
702 | { |
703 | if (!pi->status_valid) | |
704 | if (!proc_get_status (pi)) | |
0df8b418 | 705 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 706 | |
c3f6f71d | 707 | return pi->prstatus.pr_lwp.pr_why; |
c3f6f71d | 708 | } |
c906108c | 709 | |
77382aee | 710 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 711 | |
d3581e61 | 712 | static int |
fba45db2 | 713 | proc_what (procinfo *pi) |
c3f6f71d JM |
714 | { |
715 | if (!pi->status_valid) | |
716 | if (!proc_get_status (pi)) | |
0df8b418 | 717 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 718 | |
c3f6f71d | 719 | return pi->prstatus.pr_lwp.pr_what; |
c3f6f71d | 720 | } |
c906108c | 721 | |
77382aee PA |
722 | /* This function is only called when PI is stopped by a watchpoint. |
723 | Assuming the OS supports it, write to *ADDR the data address which | |
724 | triggered it and return 1. Return 0 if it is not possible to know | |
725 | the address. */ | |
bf701c2c PM |
726 | |
727 | static int | |
728 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
729 | { | |
730 | if (!pi->status_valid) | |
731 | if (!proc_get_status (pi)) | |
732 | return 0; | |
733 | ||
f5656ead TT |
734 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
735 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c | 736 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
bf701c2c PM |
737 | return 1; |
738 | } | |
739 | ||
77382aee PA |
740 | /* Returns the pr_nsysarg field (number of args to the current |
741 | syscall). */ | |
c3f6f71d | 742 | |
d3581e61 | 743 | static int |
fba45db2 | 744 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
745 | { |
746 | if (!pi->status_valid) | |
747 | if (!proc_get_status (pi)) | |
748 | return 0; | |
19958708 | 749 | |
c3f6f71d | 750 | return pi->prstatus.pr_lwp.pr_nsysarg; |
c3f6f71d | 751 | } |
c906108c | 752 | |
77382aee PA |
753 | /* Returns the pr_sysarg field (pointer to the arguments of current |
754 | syscall). */ | |
c906108c | 755 | |
d3581e61 | 756 | static long * |
fba45db2 | 757 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
758 | { |
759 | if (!pi->status_valid) | |
760 | if (!proc_get_status (pi)) | |
761 | return NULL; | |
19958708 | 762 | |
c3f6f71d | 763 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
c3f6f71d | 764 | } |
77382aee | 765 | |
44122162 | 766 | /* Set or reset any of the following process flags: |
77382aee PA |
767 | PR_FORK -- forked child will inherit trace flags |
768 | PR_RLC -- traced process runs when last /proc file closed. | |
769 | PR_KLC -- traced process is killed when last /proc file closed. | |
770 | PR_ASYNC -- LWP's get to run/stop independently. | |
771 | ||
44122162 | 772 | This function is done using read/write [PCSET/PCRESET/PCUNSET]. |
77382aee PA |
773 | |
774 | Arguments: | |
775 | pi -- the procinfo | |
776 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
777 | mode -- 1 for set, 0 for reset. | |
778 | ||
779 | Returns non-zero for success, zero for failure. */ | |
c906108c | 780 | |
c3f6f71d | 781 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 782 | |
c3f6f71d | 783 | static int |
fba45db2 | 784 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
785 | { |
786 | long win = 0; /* default to fail */ | |
787 | ||
77382aee PA |
788 | /* These operations affect the process as a whole, and applying them |
789 | to an individual LWP has the same meaning as applying them to the | |
790 | main process. Therefore, if we're ever called with a pointer to | |
791 | an LWP's procinfo, let's substitute the process's procinfo and | |
792 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
793 | |
794 | if (pi->pid != 0) | |
795 | pi = find_procinfo_or_die (pi->pid, 0); | |
796 | ||
44122162 | 797 | procfs_ctl_t arg[2]; |
c5aa993b | 798 | |
44122162 RO |
799 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
800 | arg[0] = PCSET; | |
0df8b418 | 801 | else /* Reset the flag. */ |
44122162 RO |
802 | arg[0] = PCUNSET; |
803 | ||
804 | arg[1] = flag; | |
805 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 806 | |
77382aee PA |
807 | /* The above operation renders the procinfo's cached pstatus |
808 | obsolete. */ | |
c3f6f71d | 809 | pi->status_valid = 0; |
c906108c | 810 | |
c3f6f71d | 811 | if (!win) |
8a3fe4f8 | 812 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
813 | flag == PR_FORK ? "PR_FORK" : |
814 | flag == PR_RLC ? "PR_RLC" : | |
c3f6f71d | 815 | flag == PR_ASYNC ? "PR_ASYNC" : |
0d06e24b | 816 | flag == PR_KLC ? "PR_KLC" : |
c3f6f71d JM |
817 | "<unknown flag>", |
818 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 819 | |
c3f6f71d JM |
820 | return win; |
821 | } | |
c906108c | 822 | |
77382aee PA |
823 | /* Set the run_on_last_close flag. Process with all threads will |
824 | become runnable when debugger closes all /proc fds. Returns | |
825 | non-zero for success, zero for failure. */ | |
c906108c | 826 | |
d3581e61 | 827 | static int |
fba45db2 | 828 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 829 | { |
c3f6f71d JM |
830 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
831 | } | |
c906108c | 832 | |
77382aee PA |
833 | /* Reset the run_on_last_close flag. The process will NOT become |
834 | runnable when debugger closes its file handles. Returns non-zero | |
835 | for success, zero for failure. */ | |
c906108c | 836 | |
d3581e61 | 837 | static int |
fba45db2 | 838 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
839 | { |
840 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
841 | } |
842 | ||
77382aee PA |
843 | /* Reset inherit_on_fork flag. If the process forks a child while we |
844 | are registered for events in the parent, then we will NOT recieve | |
845 | events from the child. Returns non-zero for success, zero for | |
846 | failure. */ | |
c906108c | 847 | |
d3581e61 | 848 | static int |
fba45db2 | 849 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
850 | { |
851 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
852 | } | |
c906108c | 853 | |
77382aee PA |
854 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
855 | (signal etc.), the remaining LWPs will continue to run. Returns | |
856 | non-zero for success, zero for failure. */ | |
c906108c | 857 | |
d3581e61 | 858 | static int |
fba45db2 | 859 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
860 | { |
861 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
862 | } | |
c906108c | 863 | |
77382aee PA |
864 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
865 | (signal etc.), then all other LWPs will stop as well. Returns | |
866 | non-zero for success, zero for failure. */ | |
c906108c | 867 | |
d3581e61 | 868 | static int |
fba45db2 | 869 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
870 | { |
871 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
872 | } | |
c906108c | 873 | |
77382aee PA |
874 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
875 | for success, zero for failure. */ | |
c906108c | 876 | |
d3581e61 | 877 | static int |
fba45db2 | 878 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
879 | { |
880 | int win; | |
c906108c | 881 | |
77382aee PA |
882 | /* We might conceivably apply this operation to an LWP, and the |
883 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 884 | |
c3f6f71d JM |
885 | if (pi->ctl_fd == 0 && |
886 | open_procinfo_files (pi, FD_CTL) == 0) | |
887 | return 0; | |
888 | else | |
889 | { | |
37de36c6 | 890 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 891 | |
c3f6f71d | 892 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d | 893 | } |
c906108c | 894 | |
c3f6f71d JM |
895 | return win; |
896 | } | |
c5aa993b | 897 | |
77382aee PA |
898 | /* Wait for the process or LWP to stop (block until it does). Returns |
899 | non-zero for success, zero for failure. */ | |
c906108c | 900 | |
d3581e61 | 901 | static int |
fba45db2 | 902 | proc_wait_for_stop (procinfo *pi) |
c906108c | 903 | { |
c3f6f71d JM |
904 | int win; |
905 | ||
77382aee PA |
906 | /* We should never have to apply this operation to any procinfo |
907 | except the one for the main process. If that ever changes for | |
908 | any reason, then take out the following clause and replace it | |
909 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 910 | |
c3f6f71d JM |
911 | if (pi->tid != 0) |
912 | pi = find_procinfo_or_die (pi->pid, 0); | |
913 | ||
44122162 | 914 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 915 | |
44122162 RO |
916 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
917 | /* We been runnin' and we stopped -- need to update status. */ | |
918 | pi->status_valid = 0; | |
c906108c | 919 | |
c3f6f71d | 920 | return win; |
c906108c SS |
921 | } |
922 | ||
77382aee PA |
923 | /* Make the process or LWP runnable. |
924 | ||
925 | Options (not all are implemented): | |
926 | - single-step | |
927 | - clear current fault | |
928 | - clear current signal | |
929 | - abort the current system call | |
930 | - stop as soon as finished with system call | |
931 | - (ioctl): set traced signal set | |
932 | - (ioctl): set held signal set | |
933 | - (ioctl): set traced fault set | |
934 | - (ioctl): set start pc (vaddr) | |
935 | ||
936 | Always clears the current fault. PI is the process or LWP to | |
937 | operate on. If STEP is true, set the process or LWP to trap after | |
938 | one instruction. If SIGNO is zero, clear the current signal if | |
939 | any; if non-zero, set the current signal to this one. Returns | |
940 | non-zero for success, zero for failure. */ | |
c3f6f71d | 941 | |
d3581e61 | 942 | static int |
fba45db2 | 943 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
944 | { |
945 | int win; | |
946 | int runflags; | |
947 | ||
77382aee PA |
948 | /* We will probably have to apply this operation to individual |
949 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 950 | |
c3f6f71d JM |
951 | if (pi->ctl_fd == 0 && |
952 | open_procinfo_files (pi, FD_CTL) == 0) | |
953 | { | |
954 | return 0; | |
955 | } | |
c906108c | 956 | |
0df8b418 | 957 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
958 | if (step) |
959 | runflags |= PRSTEP; | |
960 | if (signo == 0) | |
961 | runflags |= PRCSIG; | |
0df8b418 | 962 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 963 | proc_set_current_signal (pi, signo); |
c5aa993b | 964 | |
44122162 | 965 | procfs_ctl_t cmd[2]; |
c906108c | 966 | |
44122162 RO |
967 | cmd[0] = PCRUN; |
968 | cmd[1] = runflags; | |
969 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c906108c | 970 | |
c3f6f71d JM |
971 | return win; |
972 | } | |
c906108c | 973 | |
77382aee PA |
974 | /* Register to trace signals in the process or LWP. Returns non-zero |
975 | for success, zero for failure. */ | |
c906108c | 976 | |
d3581e61 | 977 | static int |
44122162 | 978 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 979 | { |
c3f6f71d JM |
980 | int win; |
981 | ||
77382aee PA |
982 | /* We should never have to apply this operation to any procinfo |
983 | except the one for the main process. If that ever changes for | |
984 | any reason, then take out the following clause and replace it | |
985 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 986 | |
c3f6f71d JM |
987 | if (pi->tid != 0) |
988 | pi = find_procinfo_or_die (pi->pid, 0); | |
989 | ||
44122162 RO |
990 | struct { |
991 | procfs_ctl_t cmd; | |
992 | /* Use char array to avoid alignment issues. */ | |
993 | char sigset[sizeof (sigset_t)]; | |
994 | } arg; | |
c906108c | 995 | |
44122162 RO |
996 | arg.cmd = PCSTRACE; |
997 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
998 | ||
999 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1000 | |
0df8b418 | 1001 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1002 | pi->status_valid = 0; |
c906108c | 1003 | |
c3f6f71d | 1004 | if (!win) |
8a3fe4f8 | 1005 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1006 | return win; |
c906108c SS |
1007 | } |
1008 | ||
77382aee PA |
1009 | /* Register to trace hardware faults in the process or LWP. Returns |
1010 | non-zero for success, zero for failure. */ | |
c906108c | 1011 | |
d3581e61 | 1012 | static int |
fba45db2 | 1013 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1014 | { |
1015 | int win; | |
1016 | ||
77382aee PA |
1017 | /* We should never have to apply this operation to any procinfo |
1018 | except the one for the main process. If that ever changes for | |
1019 | any reason, then take out the following clause and replace it | |
1020 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1021 | |
c3f6f71d JM |
1022 | if (pi->tid != 0) |
1023 | pi = find_procinfo_or_die (pi->pid, 0); | |
1024 | ||
44122162 RO |
1025 | struct { |
1026 | procfs_ctl_t cmd; | |
1027 | /* Use char array to avoid alignment issues. */ | |
1028 | char fltset[sizeof (fltset_t)]; | |
1029 | } arg; | |
1030 | ||
1031 | arg.cmd = PCSFAULT; | |
1032 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1033 | |
44122162 | 1034 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
c906108c | 1035 | |
0df8b418 | 1036 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1037 | pi->status_valid = 0; |
c906108c | 1038 | |
c3f6f71d JM |
1039 | return win; |
1040 | } | |
c5aa993b | 1041 | |
77382aee PA |
1042 | /* Register to trace entry to system calls in the process or LWP. |
1043 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1044 | |
d3581e61 | 1045 | static int |
fba45db2 | 1046 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1047 | { |
c3f6f71d JM |
1048 | int win; |
1049 | ||
77382aee PA |
1050 | /* We should never have to apply this operation to any procinfo |
1051 | except the one for the main process. If that ever changes for | |
1052 | any reason, then take out the following clause and replace it | |
1053 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1054 | |
c3f6f71d JM |
1055 | if (pi->tid != 0) |
1056 | pi = find_procinfo_or_die (pi->pid, 0); | |
1057 | ||
44122162 RO |
1058 | struct gdb_proc_ctl_pcsentry { |
1059 | procfs_ctl_t cmd; | |
1060 | /* Use char array to avoid alignment issues. */ | |
1061 | char sysset[sizeof (sysset_t)]; | |
1062 | } *argp; | |
1063 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry); | |
c3f6f71d | 1064 | |
44122162 | 1065 | argp = (struct gdb_proc_ctl_pcsentry *) xmalloc (argp_size); |
c3f6f71d | 1066 | |
44122162 RO |
1067 | argp->cmd = PCSENTRY; |
1068 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
1069 | ||
1070 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1071 | xfree (argp); | |
37de36c6 | 1072 | |
77382aee PA |
1073 | /* The above operation renders the procinfo's cached pstatus |
1074 | obsolete. */ | |
c3f6f71d | 1075 | pi->status_valid = 0; |
19958708 | 1076 | |
c3f6f71d | 1077 | return win; |
c906108c SS |
1078 | } |
1079 | ||
77382aee PA |
1080 | /* Register to trace exit from system calls in the process or LWP. |
1081 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1082 | |
d3581e61 | 1083 | static int |
fba45db2 | 1084 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1085 | { |
1086 | int win; | |
1087 | ||
77382aee PA |
1088 | /* We should never have to apply this operation to any procinfo |
1089 | except the one for the main process. If that ever changes for | |
1090 | any reason, then take out the following clause and replace it | |
1091 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1092 | |
c3f6f71d JM |
1093 | if (pi->tid != 0) |
1094 | pi = find_procinfo_or_die (pi->pid, 0); | |
1095 | ||
44122162 RO |
1096 | struct gdb_proc_ctl_pcsexit { |
1097 | procfs_ctl_t cmd; | |
1098 | /* Use char array to avoid alignment issues. */ | |
1099 | char sysset[sizeof (sysset_t)]; | |
1100 | } *argp; | |
1101 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit); | |
1102 | ||
1103 | argp = (struct gdb_proc_ctl_pcsexit *) xmalloc (argp_size); | |
c906108c | 1104 | |
44122162 RO |
1105 | argp->cmd = PCSEXIT; |
1106 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1107 | |
44122162 RO |
1108 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
1109 | xfree (argp); | |
37de36c6 | 1110 | |
77382aee PA |
1111 | /* The above operation renders the procinfo's cached pstatus |
1112 | obsolete. */ | |
c3f6f71d | 1113 | pi->status_valid = 0; |
c906108c | 1114 | |
c3f6f71d JM |
1115 | return win; |
1116 | } | |
c906108c | 1117 | |
77382aee PA |
1118 | /* Specify the set of blocked / held signals in the process or LWP. |
1119 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1120 | |
d3581e61 | 1121 | static int |
44122162 | 1122 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1123 | { |
c3f6f71d JM |
1124 | int win; |
1125 | ||
77382aee PA |
1126 | /* We should never have to apply this operation to any procinfo |
1127 | except the one for the main process. If that ever changes for | |
1128 | any reason, then take out the following clause and replace it | |
1129 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1130 | |
c3f6f71d JM |
1131 | if (pi->tid != 0) |
1132 | pi = find_procinfo_or_die (pi->pid, 0); | |
1133 | ||
44122162 RO |
1134 | struct { |
1135 | procfs_ctl_t cmd; | |
1136 | /* Use char array to avoid alignment issues. */ | |
1137 | char hold[sizeof (sigset_t)]; | |
1138 | } arg; | |
1139 | ||
1140 | arg.cmd = PCSHOLD; | |
1141 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1142 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1143 | ||
77382aee PA |
1144 | /* The above operation renders the procinfo's cached pstatus |
1145 | obsolete. */ | |
c3f6f71d JM |
1146 | pi->status_valid = 0; |
1147 | ||
1148 | return win; | |
c906108c SS |
1149 | } |
1150 | ||
77382aee PA |
1151 | /* Returns the set of signals that are held / blocked. Will also copy |
1152 | the sigset if SAVE is non-zero. */ | |
c906108c | 1153 | |
44122162 RO |
1154 | static sigset_t * |
1155 | proc_get_held_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1156 | { |
44122162 | 1157 | sigset_t *ret = NULL; |
c3f6f71d | 1158 | |
77382aee PA |
1159 | /* We should never have to apply this operation to any procinfo |
1160 | except the one for the main process. If that ever changes for | |
1161 | any reason, then take out the following clause and replace it | |
1162 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1163 | |
c3f6f71d JM |
1164 | if (pi->tid != 0) |
1165 | pi = find_procinfo_or_die (pi->pid, 0); | |
1166 | ||
c3f6f71d JM |
1167 | if (!pi->status_valid) |
1168 | if (!proc_get_status (pi)) | |
1169 | return NULL; | |
1170 | ||
c3f6f71d | 1171 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d | 1172 | if (save && ret) |
44122162 | 1173 | memcpy (save, ret, sizeof (sigset_t)); |
c3f6f71d JM |
1174 | |
1175 | return ret; | |
c906108c SS |
1176 | } |
1177 | ||
77382aee PA |
1178 | /* Returns the set of signals that are traced / debugged. Will also |
1179 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1180 | |
44122162 RO |
1181 | static sigset_t * |
1182 | proc_get_traced_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1183 | { |
44122162 | 1184 | sigset_t *ret = NULL; |
c3f6f71d | 1185 | |
77382aee PA |
1186 | /* We should never have to apply this operation to any procinfo |
1187 | except the one for the main process. If that ever changes for | |
1188 | any reason, then take out the following clause and replace it | |
1189 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1190 | |
c3f6f71d JM |
1191 | if (pi->tid != 0) |
1192 | pi = find_procinfo_or_die (pi->pid, 0); | |
1193 | ||
c3f6f71d JM |
1194 | if (!pi->status_valid) |
1195 | if (!proc_get_status (pi)) | |
1196 | return NULL; | |
1197 | ||
1198 | ret = &pi->prstatus.pr_sigtrace; | |
c3f6f71d | 1199 | if (save && ret) |
44122162 | 1200 | memcpy (save, ret, sizeof (sigset_t)); |
c906108c | 1201 | |
c3f6f71d JM |
1202 | return ret; |
1203 | } | |
c906108c | 1204 | |
77382aee PA |
1205 | /* Returns the set of hardware faults that are traced /debugged. Will |
1206 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1207 | |
d3581e61 | 1208 | static fltset_t * |
fba45db2 | 1209 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1210 | { |
1211 | fltset_t *ret = NULL; | |
1212 | ||
77382aee PA |
1213 | /* We should never have to apply this operation to any procinfo |
1214 | except the one for the main process. If that ever changes for | |
1215 | any reason, then take out the following clause and replace it | |
1216 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1217 | |
c3f6f71d JM |
1218 | if (pi->tid != 0) |
1219 | pi = find_procinfo_or_die (pi->pid, 0); | |
1220 | ||
c3f6f71d JM |
1221 | if (!pi->status_valid) |
1222 | if (!proc_get_status (pi)) | |
1223 | return NULL; | |
1224 | ||
1225 | ret = &pi->prstatus.pr_flttrace; | |
c3f6f71d JM |
1226 | if (save && ret) |
1227 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1228 | |
c3f6f71d JM |
1229 | return ret; |
1230 | } | |
c906108c | 1231 | |
77382aee PA |
1232 | /* Returns the set of syscalls that are traced /debugged on entry. |
1233 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1234 | |
d3581e61 | 1235 | static sysset_t * |
fba45db2 | 1236 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1237 | { |
1238 | sysset_t *ret = NULL; | |
1239 | ||
77382aee PA |
1240 | /* We should never have to apply this operation to any procinfo |
1241 | except the one for the main process. If that ever changes for | |
1242 | any reason, then take out the following clause and replace it | |
1243 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1244 | |
c3f6f71d JM |
1245 | if (pi->tid != 0) |
1246 | pi = find_procinfo_or_die (pi->pid, 0); | |
1247 | ||
c3f6f71d JM |
1248 | if (!pi->status_valid) |
1249 | if (!proc_get_status (pi)) | |
1250 | return NULL; | |
1251 | ||
1252 | ret = &pi->prstatus.pr_sysentry; | |
c3f6f71d | 1253 | if (save && ret) |
44122162 | 1254 | memcpy (save, ret, sizeof (sysset_t)); |
c906108c | 1255 | |
c3f6f71d JM |
1256 | return ret; |
1257 | } | |
c5aa993b | 1258 | |
77382aee PA |
1259 | /* Returns the set of syscalls that are traced /debugged on exit. |
1260 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1261 | |
d3581e61 | 1262 | static sysset_t * |
fba45db2 | 1263 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1264 | { |
44122162 | 1265 | sysset_t *ret = NULL; |
c3f6f71d | 1266 | |
77382aee PA |
1267 | /* We should never have to apply this operation to any procinfo |
1268 | except the one for the main process. If that ever changes for | |
1269 | any reason, then take out the following clause and replace it | |
1270 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1271 | |
c3f6f71d JM |
1272 | if (pi->tid != 0) |
1273 | pi = find_procinfo_or_die (pi->pid, 0); | |
1274 | ||
c3f6f71d JM |
1275 | if (!pi->status_valid) |
1276 | if (!proc_get_status (pi)) | |
1277 | return NULL; | |
1278 | ||
1279 | ret = &pi->prstatus.pr_sysexit; | |
c3f6f71d | 1280 | if (save && ret) |
44122162 | 1281 | memcpy (save, ret, sizeof (sysset_t)); |
c3f6f71d JM |
1282 | |
1283 | return ret; | |
1284 | } | |
c906108c | 1285 | |
77382aee PA |
1286 | /* The current fault (if any) is cleared; the associated signal will |
1287 | not be sent to the process or LWP when it resumes. Returns | |
1288 | non-zero for success, zero for failure. */ | |
c906108c | 1289 | |
d3581e61 | 1290 | static int |
fba45db2 | 1291 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
1292 | { |
1293 | int win; | |
1294 | ||
77382aee PA |
1295 | /* We should never have to apply this operation to any procinfo |
1296 | except the one for the main process. If that ever changes for | |
1297 | any reason, then take out the following clause and replace it | |
1298 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1299 | |
c3f6f71d JM |
1300 | if (pi->tid != 0) |
1301 | pi = find_procinfo_or_die (pi->pid, 0); | |
1302 | ||
44122162 | 1303 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 1304 | |
44122162 | 1305 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d JM |
1306 | |
1307 | return win; | |
c906108c SS |
1308 | } |
1309 | ||
77382aee PA |
1310 | /* Set the "current signal" that will be delivered next to the |
1311 | process. NOTE: semantics are different from those of KILL. This | |
1312 | signal will be delivered to the process or LWP immediately when it | |
1313 | is resumed (even if the signal is held/blocked); it will NOT | |
1314 | immediately cause another event of interest, and will NOT first | |
1315 | trap back to the debugger. Returns non-zero for success, zero for | |
1316 | failure. */ | |
c3f6f71d | 1317 | |
d3581e61 | 1318 | static int |
fba45db2 | 1319 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1320 | { |
1321 | int win; | |
1322 | struct { | |
37de36c6 | 1323 | procfs_ctl_t cmd; |
c3f6f71d | 1324 | /* Use char array to avoid alignment issues. */ |
44122162 | 1325 | char sinfo[sizeof (siginfo_t)]; |
c3f6f71d | 1326 | } arg; |
44122162 | 1327 | siginfo_t mysinfo; |
c162e8c9 JM |
1328 | ptid_t wait_ptid; |
1329 | struct target_waitstatus wait_status; | |
c3f6f71d | 1330 | |
77382aee PA |
1331 | /* We should never have to apply this operation to any procinfo |
1332 | except the one for the main process. If that ever changes for | |
1333 | any reason, then take out the following clause and replace it | |
1334 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1335 | |
c3f6f71d JM |
1336 | if (pi->tid != 0) |
1337 | pi = find_procinfo_or_die (pi->pid, 0); | |
1338 | ||
c3f6f71d | 1339 | /* The pointer is just a type alias. */ |
c162e8c9 JM |
1340 | get_last_target_status (&wait_ptid, &wait_status); |
1341 | if (ptid_equal (wait_ptid, inferior_ptid) | |
1342 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 1343 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 | 1344 | && proc_get_status (pi) |
c162e8c9 | 1345 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
c162e8c9 JM |
1346 | ) |
1347 | /* Use the siginfo associated with the signal being | |
1348 | redelivered. */ | |
44122162 | 1349 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (siginfo_t)); |
c162e8c9 JM |
1350 | else |
1351 | { | |
73930d4d KH |
1352 | mysinfo.si_signo = signo; |
1353 | mysinfo.si_code = 0; | |
1354 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1355 | mysinfo.si_uid = getuid (); /* ?why? */ | |
44122162 | 1356 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); |
c162e8c9 | 1357 | } |
c3f6f71d | 1358 | |
c3f6f71d JM |
1359 | arg.cmd = PCSSIG; |
1360 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1361 | |
c3f6f71d JM |
1362 | return win; |
1363 | } | |
c906108c | 1364 | |
77382aee PA |
1365 | /* The current signal (if any) is cleared, and is not sent to the |
1366 | process or LWP when it resumes. Returns non-zero for success, zero | |
1367 | for failure. */ | |
c906108c | 1368 | |
d3581e61 | 1369 | static int |
fba45db2 | 1370 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
1371 | { |
1372 | int win; | |
1373 | ||
77382aee PA |
1374 | /* We should never have to apply this operation to any procinfo |
1375 | except the one for the main process. If that ever changes for | |
1376 | any reason, then take out the following clause and replace it | |
1377 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1378 | |
c3f6f71d JM |
1379 | if (pi->tid != 0) |
1380 | pi = find_procinfo_or_die (pi->pid, 0); | |
1381 | ||
44122162 RO |
1382 | struct { |
1383 | procfs_ctl_t cmd; | |
1384 | /* Use char array to avoid alignment issues. */ | |
1385 | char sinfo[sizeof (siginfo_t)]; | |
1386 | } arg; | |
1387 | siginfo_t mysinfo; | |
1388 | ||
1389 | arg.cmd = PCSSIG; | |
1390 | /* The pointer is just a type alias. */ | |
1391 | mysinfo.si_signo = 0; | |
1392 | mysinfo.si_code = 0; | |
1393 | mysinfo.si_errno = 0; | |
1394 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1395 | mysinfo.si_uid = getuid (); /* ?why? */ | |
1396 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); | |
1397 | ||
1398 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1399 | |
c3f6f71d JM |
1400 | return win; |
1401 | } | |
c906108c | 1402 | |
772cf8be MK |
1403 | /* Return the general-purpose registers for the process or LWP |
1404 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1405 | |
d3581e61 | 1406 | static gdb_gregset_t * |
fba45db2 | 1407 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
1408 | { |
1409 | if (!pi->status_valid || !pi->gregs_valid) | |
1410 | if (!proc_get_status (pi)) | |
1411 | return NULL; | |
1412 | ||
c3f6f71d | 1413 | return &pi->prstatus.pr_lwp.pr_reg; |
c3f6f71d | 1414 | } |
c5aa993b | 1415 | |
772cf8be MK |
1416 | /* Return the general-purpose registers for the process or LWP |
1417 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1418 | |
d3581e61 | 1419 | static gdb_fpregset_t * |
fba45db2 | 1420 | proc_get_fpregs (procinfo *pi) |
c906108c | 1421 | { |
c3f6f71d JM |
1422 | if (!pi->status_valid || !pi->fpregs_valid) |
1423 | if (!proc_get_status (pi)) | |
1424 | return NULL; | |
1425 | ||
c3f6f71d | 1426 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c906108c SS |
1427 | } |
1428 | ||
772cf8be MK |
1429 | /* Write the general-purpose registers back to the process or LWP |
1430 | corresponding to PI. Return non-zero for success, zero for | |
1431 | failure. */ | |
c3f6f71d | 1432 | |
d3581e61 | 1433 | static int |
fba45db2 | 1434 | proc_set_gregs (procinfo *pi) |
c906108c | 1435 | { |
c3f6f71d JM |
1436 | gdb_gregset_t *gregs; |
1437 | int win; | |
c5aa993b | 1438 | |
772cf8be MK |
1439 | gregs = proc_get_gregs (pi); |
1440 | if (gregs == NULL) | |
1441 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 1442 | |
772cf8be | 1443 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1444 | { |
c3f6f71d | 1445 | return 0; |
c906108c | 1446 | } |
c3f6f71d | 1447 | else |
c906108c | 1448 | { |
c3f6f71d | 1449 | struct { |
37de36c6 | 1450 | procfs_ctl_t cmd; |
c3f6f71d JM |
1451 | /* Use char array to avoid alignment issues. */ |
1452 | char gregs[sizeof (gdb_gregset_t)]; | |
1453 | } arg; | |
1454 | ||
772cf8be | 1455 | arg.cmd = PCSREG; |
c3f6f71d JM |
1456 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
1457 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1458 | } |
c3f6f71d | 1459 | |
772cf8be | 1460 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1461 | pi->gregs_valid = 0; |
1462 | return win; | |
c906108c SS |
1463 | } |
1464 | ||
772cf8be MK |
1465 | /* Write the floating-pointer registers back to the process or LWP |
1466 | corresponding to PI. Return non-zero for success, zero for | |
1467 | failure. */ | |
c3f6f71d | 1468 | |
d3581e61 | 1469 | static int |
fba45db2 | 1470 | proc_set_fpregs (procinfo *pi) |
c906108c | 1471 | { |
c3f6f71d JM |
1472 | gdb_fpregset_t *fpregs; |
1473 | int win; | |
1474 | ||
772cf8be MK |
1475 | fpregs = proc_get_fpregs (pi); |
1476 | if (fpregs == NULL) | |
1477 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 1478 | |
772cf8be | 1479 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1480 | { |
c3f6f71d | 1481 | return 0; |
c906108c | 1482 | } |
c3f6f71d | 1483 | else |
c906108c | 1484 | { |
c3f6f71d | 1485 | struct { |
37de36c6 | 1486 | procfs_ctl_t cmd; |
c3f6f71d JM |
1487 | /* Use char array to avoid alignment issues. */ |
1488 | char fpregs[sizeof (gdb_fpregset_t)]; | |
1489 | } arg; | |
1490 | ||
772cf8be | 1491 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
1492 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
1493 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1494 | } |
c3f6f71d | 1495 | |
772cf8be | 1496 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1497 | pi->fpregs_valid = 0; |
1498 | return win; | |
c906108c SS |
1499 | } |
1500 | ||
77382aee PA |
1501 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
1502 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1503 | |
d3581e61 | 1504 | static int |
fba45db2 | 1505 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
1506 | { |
1507 | int win; | |
c906108c | 1508 | |
77382aee PA |
1509 | /* We might conceivably apply this operation to an LWP, and the |
1510 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1511 | |
c3f6f71d JM |
1512 | if (pi->ctl_fd == 0 && |
1513 | open_procinfo_files (pi, FD_CTL) == 0) | |
1514 | { | |
1515 | return 0; | |
1516 | } | |
1517 | else | |
1518 | { | |
37de36c6 | 1519 | procfs_ctl_t cmd[2]; |
c906108c | 1520 | |
c3f6f71d JM |
1521 | cmd[0] = PCKILL; |
1522 | cmd[1] = signo; | |
1523 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c3f6f71d | 1524 | } |
c906108c | 1525 | |
c3f6f71d JM |
1526 | return win; |
1527 | } | |
c906108c | 1528 | |
77382aee PA |
1529 | /* Find the pid of the process that started this one. Returns the |
1530 | parent process pid, or zero. */ | |
c906108c | 1531 | |
d3581e61 | 1532 | static int |
fba45db2 | 1533 | proc_parent_pid (procinfo *pi) |
c906108c | 1534 | { |
77382aee PA |
1535 | /* We should never have to apply this operation to any procinfo |
1536 | except the one for the main process. If that ever changes for | |
1537 | any reason, then take out the following clause and replace it | |
1538 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1539 | |
c3f6f71d JM |
1540 | if (pi->tid != 0) |
1541 | pi = find_procinfo_or_die (pi->pid, 0); | |
1542 | ||
1543 | if (!pi->status_valid) | |
1544 | if (!proc_get_status (pi)) | |
1545 | return 0; | |
c5aa993b | 1546 | |
c3f6f71d JM |
1547 | return pi->prstatus.pr_ppid; |
1548 | } | |
1549 | ||
9a043c1d AC |
1550 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
1551 | (a.k.a void pointer)! */ | |
1552 | ||
1553 | static void * | |
1554 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
1555 | { | |
f5656ead | 1556 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
1557 | void *ptr; |
1558 | ||
4e906f53 | 1559 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 1560 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 1561 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
1562 | return ptr; |
1563 | } | |
1564 | ||
a0911fd0 | 1565 | static int |
fba45db2 | 1566 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 1567 | { |
c3f6f71d | 1568 | struct { |
37de36c6 | 1569 | procfs_ctl_t cmd; |
c3f6f71d JM |
1570 | char watch[sizeof (prwatch_t)]; |
1571 | } arg; | |
73930d4d | 1572 | prwatch_t pwatch; |
c3f6f71d | 1573 | |
9a043c1d AC |
1574 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
1575 | convert a target address into something that can be stored in a | |
1576 | native data structure. */ | |
73930d4d | 1577 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
73930d4d KH |
1578 | pwatch.pr_size = len; |
1579 | pwatch.pr_wflags = wflags; | |
c3f6f71d | 1580 | arg.cmd = PCWATCH; |
73930d4d | 1581 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d | 1582 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
c906108c SS |
1583 | } |
1584 | ||
965b60ee | 1585 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 1586 | |
c3f6f71d | 1587 | #include <sys/sysi86.h> |
c906108c | 1588 | |
77382aee PA |
1589 | /* The KEY is actually the value of the lower 16 bits of the GS |
1590 | register for the LWP that we're interested in. Returns the | |
1591 | matching ssh struct (LDT entry). */ | |
c906108c | 1592 | |
337c776f | 1593 | static struct ssd * |
fba45db2 | 1594 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 1595 | { |
c3f6f71d | 1596 | static struct ssd *ldt_entry = NULL; |
c3f6f71d JM |
1597 | char pathname[MAX_PROC_NAME_SIZE]; |
1598 | struct cleanup *old_chain = NULL; | |
1599 | int fd; | |
1600 | ||
1601 | /* Allocate space for one LDT entry. | |
1602 | This alloc must persist, because we return a pointer to it. */ | |
1603 | if (ldt_entry == NULL) | |
8d749320 | 1604 | ldt_entry = XNEW (struct ssd); |
c3f6f71d JM |
1605 | |
1606 | /* Open the file descriptor for the LDT table. */ | |
1607 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 1608 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 1609 | { |
c3f6f71d JM |
1610 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
1611 | return NULL; | |
c906108c | 1612 | } |
0df8b418 | 1613 | /* Make sure it gets closed again! */ |
004527cb | 1614 | old_chain = make_cleanup_close (fd); |
c906108c | 1615 | |
c3f6f71d JM |
1616 | /* Now 'read' thru the table, find a match and return it. */ |
1617 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 1618 | { |
c3f6f71d JM |
1619 | if (ldt_entry->sel == 0 && |
1620 | ldt_entry->bo == 0 && | |
1621 | ldt_entry->acc1 == 0 && | |
1622 | ldt_entry->acc2 == 0) | |
1623 | break; /* end of table */ | |
0df8b418 | 1624 | /* If key matches, return this entry. */ |
c3f6f71d | 1625 | if (ldt_entry->sel == key) |
b196bc4c RO |
1626 | { |
1627 | do_cleanups (old_chain); | |
1628 | return ldt_entry; | |
1629 | } | |
c906108c | 1630 | } |
0df8b418 | 1631 | /* Loop ended, match not found. */ |
b196bc4c | 1632 | do_cleanups (old_chain); |
c3f6f71d | 1633 | return NULL; |
c3f6f71d | 1634 | } |
c906108c | 1635 | |
77382aee | 1636 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
1637 | |
1638 | struct ssd * | |
1639 | procfs_find_LDT_entry (ptid_t ptid) | |
1640 | { | |
1641 | gdb_gregset_t *gregs; | |
1642 | int key; | |
1643 | procinfo *pi; | |
1644 | ||
0df8b418 | 1645 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 1646 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 1647 | { |
0b62613e | 1648 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 1649 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1650 | return NULL; |
1651 | } | |
0df8b418 | 1652 | /* get its general registers. */ |
965b60ee JB |
1653 | if ((gregs = proc_get_gregs (pi)) == NULL) |
1654 | { | |
0b62613e | 1655 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 1656 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1657 | return NULL; |
1658 | } | |
0df8b418 | 1659 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
1660 | key = (*gregs)[GS] & 0xffff; |
1661 | ||
0df8b418 | 1662 | /* Find the matching entry and return it. */ |
965b60ee JB |
1663 | return proc_get_LDT_entry (pi, key); |
1664 | } | |
1665 | ||
1666 | #endif | |
c906108c | 1667 | |
c3f6f71d | 1668 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 1669 | |
c3f6f71d | 1670 | /* =================== Thread "MODULE" =================== */ |
c906108c | 1671 | |
44122162 RO |
1672 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
1673 | since there is a different way to do threads on every OS. */ | |
c906108c | 1674 | |
44122162 | 1675 | /* Returns the number of threads for the process. */ |
c906108c | 1676 | |
d3581e61 | 1677 | static int |
fba45db2 | 1678 | proc_get_nthreads (procinfo *pi) |
c906108c | 1679 | { |
c3f6f71d JM |
1680 | if (!pi->status_valid) |
1681 | if (!proc_get_status (pi)) | |
1682 | return 0; | |
c5aa993b | 1683 | |
44122162 RO |
1684 | /* Only works for the process procinfo, because the LWP procinfos do not |
1685 | get prstatus filled in. */ | |
0df8b418 | 1686 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 1687 | pi = find_procinfo_or_die (pi->pid, 0); |
c3f6f71d | 1688 | return pi->prstatus.pr_nlwp; |
c906108c SS |
1689 | } |
1690 | ||
77382aee PA |
1691 | /* LWP version. |
1692 | ||
1693 | Return the ID of the thread that had an event of interest. | |
1694 | (ie. the one that hit a breakpoint or other traced event). All | |
1695 | other things being equal, this should be the ID of a thread that is | |
1696 | currently executing. */ | |
c3f6f71d | 1697 | |
d3581e61 | 1698 | static int |
fba45db2 | 1699 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 1700 | { |
77382aee PA |
1701 | /* Note: this should be applied to the root procinfo for the |
1702 | process, not to the procinfo for an LWP. If applied to the | |
1703 | procinfo for an LWP, it will simply return that LWP's ID. In | |
1704 | that case, find the parent process procinfo. */ | |
19958708 | 1705 | |
c3f6f71d JM |
1706 | if (pi->tid != 0) |
1707 | pi = find_procinfo_or_die (pi->pid, 0); | |
1708 | ||
1709 | if (!pi->status_valid) | |
1710 | if (!proc_get_status (pi)) | |
1711 | return 0; | |
1712 | ||
c3f6f71d | 1713 | return pi->prstatus.pr_lwp.pr_lwpid; |
c3f6f71d JM |
1714 | } |
1715 | ||
77382aee PA |
1716 | /* Discover the IDs of all the threads within the process, and create |
1717 | a procinfo for each of them (chained to the parent). This | |
1718 | unfortunately requires a different method on every OS. Returns | |
1719 | non-zero for success, zero for failure. */ | |
c906108c | 1720 | |
a0911fd0 | 1721 | static int |
fba45db2 | 1722 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
1723 | { |
1724 | if (thread && parent) /* sanity */ | |
c906108c | 1725 | { |
c3f6f71d JM |
1726 | thread->status_valid = 0; |
1727 | if (!proc_get_status (thread)) | |
1728 | destroy_one_procinfo (&parent->thread_list, thread); | |
1729 | } | |
1730 | return 0; /* keep iterating */ | |
1731 | } | |
c5aa993b | 1732 | |
004527cb AC |
1733 | static void |
1734 | do_closedir_cleanup (void *dir) | |
1735 | { | |
b196bc4c | 1736 | closedir ((DIR *) dir); |
004527cb AC |
1737 | } |
1738 | ||
d3581e61 | 1739 | static int |
fba45db2 | 1740 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
1741 | { |
1742 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
1743 | struct dirent *direntry; | |
1744 | struct cleanup *old_chain = NULL; | |
1745 | procinfo *thread; | |
1746 | DIR *dirp; | |
1747 | int lwpid; | |
1748 | ||
77382aee PA |
1749 | /* We should never have to apply this operation to any procinfo |
1750 | except the one for the main process. If that ever changes for | |
1751 | any reason, then take out the following clause and replace it | |
1752 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1753 | |
c3f6f71d JM |
1754 | if (pi->tid != 0) |
1755 | pi = find_procinfo_or_die (pi->pid, 0); | |
1756 | ||
1757 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
1758 | ||
05b4bd79 PA |
1759 | /* Note: this brute-force method was originally devised for Unixware |
1760 | (support removed since), and will also work on Solaris 2.6 and | |
1761 | 2.7. The original comment mentioned the existence of a much | |
1762 | simpler and more elegant way to do this on Solaris, but didn't | |
1763 | point out what that was. */ | |
c3f6f71d JM |
1764 | |
1765 | strcpy (pathname, pi->pathname); | |
1766 | strcat (pathname, "/lwp"); | |
1767 | if ((dirp = opendir (pathname)) == NULL) | |
1768 | proc_error (pi, "update_threads, opendir", __LINE__); | |
1769 | ||
004527cb | 1770 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
1771 | while ((direntry = readdir (dirp)) != NULL) |
1772 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
1773 | { | |
1774 | lwpid = atoi (&direntry->d_name[0]); | |
1775 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
1776 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
1777 | } | |
1778 | pi->threads_valid = 1; | |
1779 | do_cleanups (old_chain); | |
1780 | return 1; | |
1781 | } | |
c906108c | 1782 | |
77382aee PA |
1783 | /* Given a pointer to a function, call that function once for each lwp |
1784 | in the procinfo list, until the function returns non-zero, in which | |
1785 | event return the value returned by the function. | |
1786 | ||
1787 | Note: this function does NOT call update_threads. If you want to | |
1788 | discover new threads first, you must call that function explicitly. | |
1789 | This function just makes a quick pass over the currently-known | |
1790 | procinfos. | |
1791 | ||
1792 | PI is the parent process procinfo. FUNC is the per-thread | |
1793 | function. PTR is an opaque parameter for function. Returns the | |
1794 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 1795 | |
d3581e61 | 1796 | static int |
d0849a9a KB |
1797 | proc_iterate_over_threads (procinfo *pi, |
1798 | int (*func) (procinfo *, procinfo *, void *), | |
1799 | void *ptr) | |
c906108c | 1800 | { |
c3f6f71d JM |
1801 | procinfo *thread, *next; |
1802 | int retval = 0; | |
c906108c | 1803 | |
77382aee PA |
1804 | /* We should never have to apply this operation to any procinfo |
1805 | except the one for the main process. If that ever changes for | |
1806 | any reason, then take out the following clause and replace it | |
1807 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1808 | |
c3f6f71d JM |
1809 | if (pi->tid != 0) |
1810 | pi = find_procinfo_or_die (pi->pid, 0); | |
1811 | ||
1812 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 1813 | { |
0df8b418 | 1814 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
1815 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
1816 | break; | |
c906108c | 1817 | } |
c3f6f71d JM |
1818 | |
1819 | return retval; | |
c906108c SS |
1820 | } |
1821 | ||
c3f6f71d JM |
1822 | /* =================== END, Thread "MODULE" =================== */ |
1823 | ||
1824 | /* =================== END, /proc "MODULE" =================== */ | |
1825 | ||
1826 | /* =================== GDB "MODULE" =================== */ | |
1827 | ||
77382aee PA |
1828 | /* Here are all of the gdb target vector functions and their |
1829 | friends. */ | |
c3f6f71d | 1830 | |
39f77062 | 1831 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 1832 | static void do_detach (int signo); |
9185ddce | 1833 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 1834 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 1835 | |
77382aee PA |
1836 | /* Sets up the inferior to be debugged. Registers to trace signals, |
1837 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
1838 | may want to customize that. Returns zero for success (note! | |
1839 | unlike most functions in this module); on failure, returns the LINE | |
1840 | NUMBER where it failed! */ | |
c3f6f71d JM |
1841 | |
1842 | static int | |
fba45db2 | 1843 | procfs_debug_inferior (procinfo *pi) |
c906108c | 1844 | { |
c3f6f71d | 1845 | fltset_t traced_faults; |
44122162 | 1846 | sigset_t traced_signals; |
37de36c6 KB |
1847 | sysset_t *traced_syscall_entries; |
1848 | sysset_t *traced_syscall_exits; | |
1849 | int status; | |
c906108c | 1850 | |
0df8b418 MS |
1851 | /* Register to trace hardware faults in the child. */ |
1852 | prfillset (&traced_faults); /* trace all faults... */ | |
44122162 | 1853 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
1854 | if (!proc_set_traced_faults (pi, &traced_faults)) |
1855 | return __LINE__; | |
c906108c | 1856 | |
2455069d UW |
1857 | /* Initially, register to trace all signals in the child. */ |
1858 | prfillset (&traced_signals); | |
1859 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
1860 | return __LINE__; |
1861 | ||
37de36c6 | 1862 | |
c3f6f71d | 1863 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 | 1864 | traced_syscall_entries = sysset_t_alloc (pi); |
44122162 RO |
1865 | premptyset (traced_syscall_entries); |
1866 | praddset (traced_syscall_entries, SYS_exit); | |
1867 | praddset (traced_syscall_entries, SYS_lwp_exit); | |
c906108c | 1868 | |
37de36c6 KB |
1869 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
1870 | xfree (traced_syscall_entries); | |
1871 | if (!status) | |
c3f6f71d JM |
1872 | return __LINE__; |
1873 | ||
44122162 | 1874 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
1875 | /* GW: Rationale... |
1876 | Not all systems with /proc have all the exec* syscalls with the same | |
1877 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 1878 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 1879 | |
37de36c6 | 1880 | traced_syscall_exits = sysset_t_alloc (pi); |
44122162 | 1881 | premptyset (traced_syscall_exits); |
c3f6f71d | 1882 | #ifdef SYS_exec |
44122162 | 1883 | praddset (traced_syscall_exits, SYS_exec); |
37de36c6 | 1884 | #endif |
44122162 RO |
1885 | praddset (traced_syscall_exits, SYS_execve); |
1886 | praddset (traced_syscall_exits, SYS_lwp_create); | |
1887 | praddset (traced_syscall_exits, SYS_lwp_exit); | |
c906108c | 1888 | |
37de36c6 KB |
1889 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
1890 | xfree (traced_syscall_exits); | |
1891 | if (!status) | |
c3f6f71d JM |
1892 | return __LINE__; |
1893 | ||
c3f6f71d | 1894 | return 0; |
c906108c SS |
1895 | } |
1896 | ||
19958708 | 1897 | static void |
c0939df1 | 1898 | procfs_attach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 1899 | { |
c3f6f71d JM |
1900 | char *exec_file; |
1901 | int pid; | |
1902 | ||
74164c56 | 1903 | pid = parse_pid_to_attach (args); |
c3f6f71d | 1904 | |
c3f6f71d | 1905 | if (pid == getpid ()) |
8a3fe4f8 | 1906 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 1907 | |
c3f6f71d | 1908 | if (from_tty) |
c906108c | 1909 | { |
c3f6f71d JM |
1910 | exec_file = get_exec_file (0); |
1911 | ||
1912 | if (exec_file) | |
a3f17187 | 1913 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 1914 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 1915 | else |
a3f17187 | 1916 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 1917 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
1918 | |
1919 | fflush (stdout); | |
c906108c | 1920 | } |
39f77062 | 1921 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
6a3cb8e8 PA |
1922 | if (!target_is_pushed (ops)) |
1923 | push_target (ops); | |
c3f6f71d JM |
1924 | } |
1925 | ||
19958708 | 1926 | static void |
52554a0e | 1927 | procfs_detach (struct target_ops *ops, const char *args, int from_tty) |
c3f6f71d | 1928 | { |
cc377e6b | 1929 | int sig = 0; |
dfd4cc63 | 1930 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b MK |
1931 | |
1932 | if (args) | |
1933 | sig = atoi (args); | |
c3f6f71d JM |
1934 | |
1935 | if (from_tty) | |
c906108c | 1936 | { |
995816ba | 1937 | const char *exec_file; |
cc377e6b | 1938 | |
c3f6f71d | 1939 | exec_file = get_exec_file (0); |
cc377e6b | 1940 | if (exec_file == NULL) |
c3f6f71d | 1941 | exec_file = ""; |
cc377e6b | 1942 | |
a3f17187 | 1943 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
1944 | target_pid_to_str (pid_to_ptid (pid))); |
1945 | gdb_flush (gdb_stdout); | |
c906108c | 1946 | } |
19958708 | 1947 | |
cc377e6b MK |
1948 | do_detach (sig); |
1949 | ||
39f77062 | 1950 | inferior_ptid = null_ptid; |
7f9f62ba | 1951 | detach_inferior (pid); |
6a3cb8e8 | 1952 | inf_child_maybe_unpush_target (ops); |
c906108c SS |
1953 | } |
1954 | ||
39f77062 KB |
1955 | static ptid_t |
1956 | do_attach (ptid_t ptid) | |
c906108c | 1957 | { |
c3f6f71d | 1958 | procinfo *pi; |
181e7f93 | 1959 | struct inferior *inf; |
c3f6f71d | 1960 | int fail; |
2689673f | 1961 | int lwpid; |
c3f6f71d | 1962 | |
dfd4cc63 | 1963 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 1964 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
1965 | |
1966 | if (!open_procinfo_files (pi, FD_CTL)) | |
1967 | { | |
1968 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 1969 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 1970 | ptid_get_pid (ptid)); |
c3f6f71d JM |
1971 | dead_procinfo (pi, errmsg, NOKILL); |
1972 | } | |
c906108c | 1973 | |
c3f6f71d JM |
1974 | /* Stop the process (if it isn't already stopped). */ |
1975 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 1976 | { |
c3f6f71d JM |
1977 | pi->was_stopped = 1; |
1978 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
1979 | } |
1980 | else | |
1981 | { | |
c3f6f71d JM |
1982 | pi->was_stopped = 0; |
1983 | /* Set the process to run again when we close it. */ | |
1984 | if (!proc_set_run_on_last_close (pi)) | |
1985 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
1986 | ||
0df8b418 | 1987 | /* Now stop the process. */ |
c3f6f71d JM |
1988 | if (!proc_stop_process (pi)) |
1989 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
1990 | pi->ignore_next_sigstop = 1; | |
c906108c | 1991 | } |
c3f6f71d JM |
1992 | /* Save some of the /proc state to be restored if we detach. */ |
1993 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
1994 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
1995 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
1996 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 1997 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
1998 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
1999 | NOKILL); | |
37de36c6 | 2000 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 2001 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
2002 | NOKILL); |
2003 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2004 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
2005 | ||
2006 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
2007 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
2008 | ||
6c95b8df PA |
2009 | inf = current_inferior (); |
2010 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 2011 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 2012 | inf->attach_flag = 1; |
2689673f PA |
2013 | |
2014 | /* Create a procinfo for the current lwp. */ | |
2015 | lwpid = proc_get_current_thread (pi); | |
2016 | create_procinfo (pi->pid, lwpid); | |
2017 | ||
2018 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 2019 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
2020 | add_thread (ptid); |
2021 | ||
2022 | return ptid; | |
c906108c SS |
2023 | } |
2024 | ||
2025 | static void | |
fba45db2 | 2026 | do_detach (int signo) |
c906108c | 2027 | { |
c3f6f71d | 2028 | procinfo *pi; |
c906108c | 2029 | |
0df8b418 | 2030 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
2031 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
2032 | 0); /* FIXME: threads */ | |
c3f6f71d JM |
2033 | if (signo) |
2034 | if (!proc_set_current_signal (pi, signo)) | |
2035 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 2036 | |
c3f6f71d JM |
2037 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
2038 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 2039 | |
c3f6f71d JM |
2040 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
2041 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
2042 | ||
37de36c6 | 2043 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2044 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
2045 | ||
37de36c6 | 2046 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2047 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
2048 | ||
2049 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
2050 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
2051 | ||
2052 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
2053 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 2054 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
2055 | { |
2056 | /* Clear any pending signal. */ | |
2057 | if (!proc_clear_current_fault (pi)) | |
2058 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
2059 | ||
1a303dec MS |
2060 | if (signo == 0 && !proc_clear_current_signal (pi)) |
2061 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
2062 | ||
c3f6f71d JM |
2063 | if (!proc_set_run_on_last_close (pi)) |
2064 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
2065 | } | |
2066 | ||
c3f6f71d | 2067 | destroy_procinfo (pi); |
c906108c SS |
2068 | } |
2069 | ||
772cf8be MK |
2070 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
2071 | for all registers. | |
2072 | ||
2073 | ??? Is the following note still relevant? We can't get individual | |
2074 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
2075 | don't bother with caching at all in that case. | |
2076 | ||
2077 | NOTE: Since the /proc interface cannot give us individual | |
2078 | registers, we pay no attention to REGNUM, and just fetch them all. | |
2079 | This results in the possibility that we will do unnecessarily many | |
2080 | fetches, since we may be called repeatedly for individual | |
2081 | registers. So we cache the results, and mark the cache invalid | |
2082 | when the process is resumed. */ | |
c3f6f71d | 2083 | |
c906108c | 2084 | static void |
28439f5e PA |
2085 | procfs_fetch_registers (struct target_ops *ops, |
2086 | struct regcache *regcache, int regnum) | |
c906108c | 2087 | { |
772cf8be MK |
2088 | gdb_gregset_t *gregs; |
2089 | procinfo *pi; | |
bcc0c096 SM |
2090 | ptid_t ptid = regcache_get_ptid (regcache); |
2091 | int pid = ptid_get_pid (ptid); | |
2092 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2093 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2094 | |
2689673f | 2095 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2096 | |
2097 | if (pi == NULL) | |
8a3fe4f8 | 2098 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
bcc0c096 | 2099 | target_pid_to_str (ptid)); |
c3f6f71d | 2100 | |
772cf8be MK |
2101 | gregs = proc_get_gregs (pi); |
2102 | if (gregs == NULL) | |
c3f6f71d JM |
2103 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
2104 | ||
56be3814 | 2105 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 2106 | |
40a6adc1 | 2107 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2108 | { |
772cf8be MK |
2109 | gdb_fpregset_t *fpregs; |
2110 | ||
40a6adc1 MD |
2111 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2112 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2113 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2114 | return; /* Not a floating point register. */ |
c5aa993b | 2115 | |
772cf8be MK |
2116 | fpregs = proc_get_fpregs (pi); |
2117 | if (fpregs == NULL) | |
60054393 | 2118 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 2119 | |
56be3814 | 2120 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 2121 | } |
c906108c SS |
2122 | } |
2123 | ||
772cf8be MK |
2124 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
2125 | this for all registers. | |
2126 | ||
2127 | NOTE: Since the /proc interface will not read individual registers, | |
2128 | we will cache these requests until the process is resumed, and only | |
2129 | then write them back to the inferior process. | |
77382aee | 2130 | |
772cf8be MK |
2131 | FIXME: is that a really bad idea? Have to think about cases where |
2132 | writing one register might affect the value of others, etc. */ | |
c906108c | 2133 | |
c3f6f71d | 2134 | static void |
28439f5e PA |
2135 | procfs_store_registers (struct target_ops *ops, |
2136 | struct regcache *regcache, int regnum) | |
c3f6f71d | 2137 | { |
772cf8be MK |
2138 | gdb_gregset_t *gregs; |
2139 | procinfo *pi; | |
bcc0c096 SM |
2140 | ptid_t ptid = regcache_get_ptid (regcache); |
2141 | int pid = ptid_get_pid (ptid); | |
2142 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2143 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2144 | |
2689673f | 2145 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2146 | |
2147 | if (pi == NULL) | |
8a3fe4f8 | 2148 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
bcc0c096 | 2149 | target_pid_to_str (ptid)); |
c906108c | 2150 | |
772cf8be MK |
2151 | gregs = proc_get_gregs (pi); |
2152 | if (gregs == NULL) | |
c3f6f71d | 2153 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 2154 | |
56be3814 | 2155 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
2156 | if (!proc_set_gregs (pi)) |
2157 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 2158 | |
40a6adc1 | 2159 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2160 | { |
772cf8be MK |
2161 | gdb_fpregset_t *fpregs; |
2162 | ||
40a6adc1 MD |
2163 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2164 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2165 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2166 | return; /* Not a floating point register. */ |
60054393 | 2167 | |
772cf8be MK |
2168 | fpregs = proc_get_fpregs (pi); |
2169 | if (fpregs == NULL) | |
60054393 MS |
2170 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
2171 | ||
56be3814 | 2172 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
2173 | if (!proc_set_fpregs (pi)) |
2174 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
2175 | } | |
c3f6f71d | 2176 | } |
c906108c | 2177 | |
37de36c6 KB |
2178 | static int |
2179 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
2180 | { | |
37de36c6 KB |
2181 | if (scall == SYS_lwp_exit) |
2182 | return 1; | |
37de36c6 KB |
2183 | return 0; |
2184 | } | |
2185 | ||
2186 | static int | |
2187 | syscall_is_exit (procinfo *pi, int scall) | |
2188 | { | |
37de36c6 KB |
2189 | if (scall == SYS_exit) |
2190 | return 1; | |
37de36c6 KB |
2191 | return 0; |
2192 | } | |
2193 | ||
2194 | static int | |
2195 | syscall_is_exec (procinfo *pi, int scall) | |
2196 | { | |
2197 | #ifdef SYS_exec | |
2198 | if (scall == SYS_exec) | |
2199 | return 1; | |
2200 | #endif | |
37de36c6 KB |
2201 | if (scall == SYS_execve) |
2202 | return 1; | |
37de36c6 KB |
2203 | return 0; |
2204 | } | |
2205 | ||
2206 | static int | |
2207 | syscall_is_lwp_create (procinfo *pi, int scall) | |
2208 | { | |
37de36c6 KB |
2209 | if (scall == SYS_lwp_create) |
2210 | return 1; | |
37de36c6 KB |
2211 | return 0; |
2212 | } | |
2213 | ||
77382aee PA |
2214 | /* Retrieve the next stop event from the child process. If child has |
2215 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
2216 | (or possibly wait eventcodes) into gdb internal event codes. | |
2217 | Returns the id of process (and possibly thread) that incurred the | |
2218 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 2219 | |
39f77062 | 2220 | static ptid_t |
117de6a9 | 2221 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 2222 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 2223 | { |
0df8b418 | 2224 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 2225 | procinfo *pi; |
39f77062 KB |
2226 | int wstat; |
2227 | int temp_tid; | |
2228 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
2229 | int why, what, flags; |
2230 | int retry = 0; | |
c906108c | 2231 | |
c3f6f71d | 2232 | wait_again: |
c906108c | 2233 | |
c3f6f71d JM |
2234 | retry++; |
2235 | wstat = 0; | |
39f77062 | 2236 | retval = pid_to_ptid (-1); |
c906108c | 2237 | |
0df8b418 | 2238 | /* Find procinfo for main process. */ |
dfd4cc63 | 2239 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2240 | if (pi) |
c906108c | 2241 | { |
0df8b418 | 2242 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
2243 | pi->status_valid = 0; |
2244 | pi->gregs_valid = 0; | |
2245 | pi->fpregs_valid = 0; | |
2246 | ||
0df8b418 | 2247 | #if 0 /* just try this out... */ |
c3f6f71d JM |
2248 | flags = proc_flags (pi); |
2249 | why = proc_why (pi); | |
2250 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 2251 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
2252 | #endif |
2253 | /* If child is not stopped, wait for it to stop. */ | |
2254 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
2255 | !proc_wait_for_stop (pi)) | |
c906108c | 2256 | { |
0df8b418 | 2257 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 2258 | if (errno == ENOENT) |
c906108c | 2259 | { |
39f77062 KB |
2260 | int wait_retval; |
2261 | ||
0df8b418 MS |
2262 | /* /proc file not found; presumably child has terminated. */ |
2263 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 2264 | |
dfd4cc63 LM |
2265 | /* Wrong child? */ |
2266 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
2267 | error (_("procfs: couldn't stop " |
2268 | "process %d: wait returned %d."), | |
dfd4cc63 | 2269 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 2270 | /* FIXME: might I not just use waitpid? |
0df8b418 | 2271 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 2272 | retval = pid_to_ptid (wait_retval); |
c906108c | 2273 | } |
d1566ff5 FN |
2274 | else if (errno == EINTR) |
2275 | goto wait_again; | |
c3f6f71d | 2276 | else |
c906108c | 2277 | { |
0df8b418 | 2278 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 2279 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 2280 | } |
c3f6f71d JM |
2281 | } |
2282 | else | |
2283 | { | |
2284 | /* This long block is reached if either: | |
2285 | a) the child was already stopped, or | |
2286 | b) we successfully waited for the child with wait_for_stop. | |
2287 | This block will analyze the /proc status, and translate it | |
2288 | into a waitstatus for GDB. | |
2289 | ||
2290 | If we actually had to call wait because the /proc file | |
19958708 | 2291 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
2292 | because we already have a waitstatus. */ |
2293 | ||
2294 | flags = proc_flags (pi); | |
2295 | why = proc_why (pi); | |
2296 | what = proc_what (pi); | |
2297 | ||
c3f6f71d | 2298 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 2299 | { |
c3f6f71d JM |
2300 | /* If it's running async (for single_thread control), |
2301 | set it back to normal again. */ | |
2302 | if (flags & PR_ASYNC) | |
2303 | if (!proc_unset_async (pi)) | |
2304 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
c3f6f71d JM |
2305 | |
2306 | if (info_verbose) | |
2307 | proc_prettyprint_why (why, what, 1); | |
2308 | ||
2309 | /* The 'pid' we will return to GDB is composed of | |
2310 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 2311 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
2312 | |
2313 | switch (why) { | |
2314 | case PR_SIGNALLED: | |
2315 | wstat = (what << 8) | 0177; | |
2316 | break; | |
2317 | case PR_SYSENTRY: | |
37de36c6 | 2318 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 2319 | { |
17faa917 DJ |
2320 | if (print_thread_events) |
2321 | printf_unfiltered (_("[%s exited]\n"), | |
2322 | target_pid_to_str (retval)); | |
37de36c6 KB |
2323 | delete_thread (retval); |
2324 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2325 | return retval; | |
2326 | } | |
2327 | else if (syscall_is_exit (pi, what)) | |
2328 | { | |
181e7f93 PA |
2329 | struct inferior *inf; |
2330 | ||
0df8b418 | 2331 | /* Handle SYS_exit call only. */ |
37de36c6 | 2332 | /* Stopped at entry to SYS_exit. |
19958708 | 2333 | Make it runnable, resume it, then use |
37de36c6 | 2334 | the wait system call to get its exit code. |
19958708 | 2335 | Proc_run_process always clears the current |
37de36c6 KB |
2336 | fault and signal. |
2337 | Then return its exit status. */ | |
2338 | pi->status_valid = 0; | |
2339 | wstat = 0; | |
19958708 | 2340 | /* FIXME: what we should do is return |
37de36c6 KB |
2341 | TARGET_WAITKIND_SPURIOUS. */ |
2342 | if (!proc_run_process (pi, 0, 0)) | |
2343 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
2344 | |
2345 | inf = find_inferior_pid (pi->pid); | |
2346 | if (inf->attach_flag) | |
c3f6f71d | 2347 | { |
19958708 | 2348 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
2349 | return a "success" exit code. Bogus: what if |
2350 | it returns something else? */ | |
2351 | wstat = 0; | |
39f77062 | 2352 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
2353 | } |
2354 | else | |
2355 | { | |
2356 | int temp = wait (&wstat); | |
2357 | ||
2358 | /* FIXME: shouldn't I make sure I get the right | |
2359 | event from the right process? If (for | |
2360 | instance) I have killed an earlier inferior | |
2361 | process but failed to clean up after it | |
2362 | somehow, I could get its termination event | |
2363 | here. */ | |
2364 | ||
0df8b418 MS |
2365 | /* If wait returns -1, that's what we return |
2366 | to GDB. */ | |
37de36c6 | 2367 | if (temp < 0) |
39f77062 | 2368 | retval = pid_to_ptid (temp); |
c3f6f71d | 2369 | } |
c3f6f71d | 2370 | } |
37de36c6 KB |
2371 | else |
2372 | { | |
a3f17187 | 2373 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
2374 | proc_prettyprint_syscall (proc_what (pi), 0); |
2375 | printf_filtered ("\n"); | |
44122162 RO |
2376 | |
2377 | long i, nsysargs, *sysargs; | |
2378 | ||
2379 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2380 | (sysargs = proc_sysargs (pi)) != NULL) | |
2381 | { | |
2382 | printf_filtered (_("%ld syscall arguments:\n"), | |
2383 | nsysargs); | |
2384 | for (i = 0; i < nsysargs; i++) | |
2385 | printf_filtered ("#%ld: 0x%08lx\n", | |
2386 | i, sysargs[i]); | |
2387 | } | |
2388 | ||
37de36c6 KB |
2389 | if (status) |
2390 | { | |
0df8b418 MS |
2391 | /* How to exit gracefully, returning "unknown |
2392 | event". */ | |
37de36c6 | 2393 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2394 | return inferior_ptid; |
37de36c6 KB |
2395 | } |
2396 | else | |
2397 | { | |
2398 | /* How to keep going without returning to wfi: */ | |
049a8570 | 2399 | target_continue_no_signal (ptid); |
37de36c6 KB |
2400 | goto wait_again; |
2401 | } | |
2402 | } | |
2403 | break; | |
2404 | case PR_SYSEXIT: | |
2405 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 2406 | { |
37de36c6 KB |
2407 | /* Hopefully this is our own "fork-child" execing |
2408 | the real child. Hoax this event into a trap, and | |
2409 | GDB will see the child about to execute its start | |
0df8b418 | 2410 | address. */ |
37de36c6 KB |
2411 | wstat = (SIGTRAP << 8) | 0177; |
2412 | } | |
2413 | else if (syscall_is_lwp_create (pi, what)) | |
2414 | { | |
77382aee PA |
2415 | /* This syscall is somewhat like fork/exec. We |
2416 | will get the event twice: once for the parent | |
2417 | LWP, and once for the child. We should already | |
2418 | know about the parent LWP, but the child will | |
2419 | be new to us. So, whenever we get this event, | |
2420 | if it represents a new thread, simply add the | |
2421 | thread to the list. */ | |
c3f6f71d | 2422 | |
37de36c6 | 2423 | /* If not in procinfo list, add it. */ |
39f77062 KB |
2424 | temp_tid = proc_get_current_thread (pi); |
2425 | if (!find_procinfo (pi->pid, temp_tid)) | |
2426 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 2427 | |
dfd4cc63 | 2428 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 2429 | /* If not in GDB's thread list, add it. */ |
39f77062 | 2430 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
2431 | add_thread (temp_ptid); |
2432 | ||
0df8b418 | 2433 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 2434 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2435 | return inferior_ptid; |
37de36c6 KB |
2436 | } |
2437 | else if (syscall_is_lwp_exit (pi, what)) | |
2438 | { | |
17faa917 DJ |
2439 | if (print_thread_events) |
2440 | printf_unfiltered (_("[%s exited]\n"), | |
2441 | target_pid_to_str (retval)); | |
37de36c6 KB |
2442 | delete_thread (retval); |
2443 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2444 | return retval; | |
c3f6f71d | 2445 | } |
37de36c6 KB |
2446 | else if (0) |
2447 | { | |
2448 | /* FIXME: Do we need to handle SYS_sproc, | |
2449 | SYS_fork, or SYS_vfork here? The old procfs | |
2450 | seemed to use this event to handle threads on | |
2451 | older (non-LWP) systems, where I'm assuming | |
19958708 | 2452 | that threads were actually separate processes. |
37de36c6 KB |
2453 | Irix, maybe? Anyway, low priority for now. */ |
2454 | } | |
2455 | else | |
2456 | { | |
a3f17187 | 2457 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
2458 | proc_prettyprint_syscall (proc_what (pi), 0); |
2459 | printf_filtered ("\n"); | |
44122162 RO |
2460 | |
2461 | long i, nsysargs, *sysargs; | |
2462 | ||
2463 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2464 | (sysargs = proc_sysargs (pi)) != NULL) | |
2465 | { | |
2466 | printf_filtered (_("%ld syscall arguments:\n"), | |
2467 | nsysargs); | |
2468 | for (i = 0; i < nsysargs; i++) | |
2469 | printf_filtered ("#%ld: 0x%08lx\n", | |
2470 | i, sysargs[i]); | |
2471 | } | |
2472 | ||
37de36c6 | 2473 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2474 | return inferior_ptid; |
37de36c6 | 2475 | } |
c3f6f71d JM |
2476 | break; |
2477 | case PR_REQUESTED: | |
2478 | #if 0 /* FIXME */ | |
2479 | wstat = (SIGSTOP << 8) | 0177; | |
2480 | break; | |
2481 | #else | |
2482 | if (retry < 5) | |
2483 | { | |
a3f17187 | 2484 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
2485 | pi->status_valid = 0; |
2486 | goto wait_again; | |
2487 | } | |
2488 | else | |
2489 | { | |
2490 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
2491 | temp_tid = proc_get_current_thread (pi); |
2492 | if (!find_procinfo (pi->pid, temp_tid)) | |
2493 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
2494 | |
2495 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 2496 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 2497 | if (!in_thread_list (temp_ptid)) |
93815fbf | 2498 | add_thread (temp_ptid); |
c3f6f71d JM |
2499 | |
2500 | status->kind = TARGET_WAITKIND_STOPPED; | |
b196bc4c | 2501 | status->value.sig = GDB_SIGNAL_0; |
c3f6f71d JM |
2502 | return retval; |
2503 | } | |
2504 | #endif | |
2505 | case PR_JOBCONTROL: | |
2506 | wstat = (what << 8) | 0177; | |
2507 | break; | |
2508 | case PR_FAULTED: | |
7af6341f | 2509 | switch (what) { |
c3f6f71d JM |
2510 | case FLTWATCH: |
2511 | wstat = (SIGTRAP << 8) | 0177; | |
2512 | break; | |
0df8b418 | 2513 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 2514 | case FLTPRIV: |
c3f6f71d | 2515 | case FLTILL: |
c3f6f71d JM |
2516 | wstat = (SIGILL << 8) | 0177; |
2517 | break; | |
2518 | case FLTBPT: | |
c3f6f71d | 2519 | case FLTTRACE: |
c3f6f71d JM |
2520 | wstat = (SIGTRAP << 8) | 0177; |
2521 | break; | |
2522 | case FLTSTACK: | |
2523 | case FLTACCESS: | |
c3f6f71d | 2524 | case FLTBOUNDS: |
c3f6f71d JM |
2525 | wstat = (SIGSEGV << 8) | 0177; |
2526 | break; | |
2527 | case FLTIOVF: | |
2528 | case FLTIZDIV: | |
c3f6f71d | 2529 | case FLTFPE: |
c3f6f71d JM |
2530 | wstat = (SIGFPE << 8) | 0177; |
2531 | break; | |
3e43a32a | 2532 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
2533 | default: /* FIXME: use si_signo if possible for |
2534 | fault. */ | |
39f77062 | 2535 | retval = pid_to_ptid (-1); |
c3f6f71d | 2536 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 2537 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2538 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2539 | error (_("... giving up...")); |
c3f6f71d JM |
2540 | break; |
2541 | } | |
2542 | break; /* case PR_FAULTED: */ | |
2543 | default: /* switch (why) unmatched */ | |
2544 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 2545 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2546 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2547 | error (_("... giving up...")); |
c3f6f71d JM |
2548 | break; |
2549 | } | |
77382aee PA |
2550 | /* Got this far without error: If retval isn't in the |
2551 | threads database, add it. */ | |
dfd4cc63 | 2552 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 2553 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 2554 | !in_thread_list (retval)) |
c906108c | 2555 | { |
77382aee PA |
2556 | /* We have a new thread. We need to add it both to |
2557 | GDB's list and to our own. If we don't create a | |
2558 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 2559 | add_thread (retval); |
dfd4cc63 LM |
2560 | if (find_procinfo (ptid_get_pid (retval), |
2561 | ptid_get_lwp (retval)) == NULL) | |
2562 | create_procinfo (ptid_get_pid (retval), | |
2563 | ptid_get_lwp (retval)); | |
c906108c | 2564 | } |
c906108c | 2565 | } |
0df8b418 | 2566 | else /* Flags do not indicate STOPPED. */ |
c906108c | 2567 | { |
0df8b418 | 2568 | /* surely this can't happen... */ |
c3f6f71d JM |
2569 | printf_filtered ("procfs:%d -- process not stopped.\n", |
2570 | __LINE__); | |
2571 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 2572 | error (_("procfs: ...giving up...")); |
c906108c | 2573 | } |
c906108c | 2574 | } |
c906108c | 2575 | |
c3f6f71d JM |
2576 | if (status) |
2577 | store_waitstatus (status, wstat); | |
c906108c SS |
2578 | } |
2579 | ||
c3f6f71d JM |
2580 | return retval; |
2581 | } | |
c906108c | 2582 | |
4e73f23d RM |
2583 | /* Perform a partial transfer to/from the specified object. For |
2584 | memory transfers, fall back to the old memory xfer functions. */ | |
2585 | ||
9b409511 | 2586 | static enum target_xfer_status |
4e73f23d | 2587 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
0b62613e | 2588 | const char *annex, gdb_byte *readbuf, |
9b409511 YQ |
2589 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
2590 | ULONGEST *xfered_len) | |
4e73f23d RM |
2591 | { |
2592 | switch (object) | |
2593 | { | |
2594 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 2595 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d | 2596 | |
4e73f23d | 2597 | case TARGET_OBJECT_AUXV: |
9f2982ff | 2598 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
9b409511 | 2599 | offset, len, xfered_len); |
4e73f23d RM |
2600 | |
2601 | default: | |
e75fdfca TT |
2602 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2603 | readbuf, writebuf, offset, len, | |
2604 | xfered_len); | |
4e73f23d RM |
2605 | } |
2606 | } | |
2607 | ||
e96027e0 PA |
2608 | /* Helper for procfs_xfer_partial that handles memory transfers. |
2609 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 2610 | |
e96027e0 PA |
2611 | static enum target_xfer_status |
2612 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2613 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
2614 | { |
2615 | procinfo *pi; | |
e96027e0 | 2616 | int nbytes; |
c906108c | 2617 | |
0df8b418 | 2618 | /* Find procinfo for main process. */ |
dfd4cc63 | 2619 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2620 | if (pi->as_fd == 0 && |
2621 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 2622 | { |
c3f6f71d | 2623 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 2624 | return TARGET_XFER_E_IO; |
c906108c | 2625 | } |
c906108c | 2626 | |
e96027e0 PA |
2627 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
2628 | return TARGET_XFER_E_IO; | |
2629 | ||
2630 | if (writebuf != NULL) | |
c906108c | 2631 | { |
e96027e0 PA |
2632 | PROCFS_NOTE ("write memory:\n"); |
2633 | nbytes = write (pi->as_fd, writebuf, len); | |
2634 | } | |
2635 | else | |
2636 | { | |
2637 | PROCFS_NOTE ("read memory:\n"); | |
2638 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 2639 | } |
e96027e0 PA |
2640 | if (nbytes <= 0) |
2641 | return TARGET_XFER_E_IO; | |
2642 | *xfered_len = nbytes; | |
2643 | return TARGET_XFER_OK; | |
c906108c SS |
2644 | } |
2645 | ||
77382aee PA |
2646 | /* Called by target_resume before making child runnable. Mark cached |
2647 | registers and status's invalid. If there are "dirty" caches that | |
2648 | need to be written back to the child process, do that. | |
c906108c | 2649 | |
77382aee PA |
2650 | File descriptors are also cached. As they are a limited resource, |
2651 | we cannot hold onto them indefinitely. However, as they are | |
2652 | expensive to open, we don't want to throw them away | |
2653 | indescriminately either. As a compromise, we will keep the file | |
2654 | descriptors for the parent process, but discard any file | |
2655 | descriptors we may have accumulated for the threads. | |
2656 | ||
2657 | As this function is called by iterate_over_threads, it always | |
2658 | returns zero (so that iterate_over_threads will keep | |
2659 | iterating). */ | |
c3f6f71d JM |
2660 | |
2661 | static int | |
fba45db2 | 2662 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 2663 | { |
77382aee PA |
2664 | /* About to run the child; invalidate caches and do any other |
2665 | cleanup. */ | |
c906108c | 2666 | |
c3f6f71d JM |
2667 | #if 0 |
2668 | if (pi->gregs_dirty) | |
2669 | if (parent == NULL || | |
2670 | proc_get_current_thread (parent) != pi->tid) | |
2671 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
2672 | proc_warn (pi, "target_resume, set_gregs", | |
2673 | __LINE__); | |
f5656ead | 2674 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
2675 | if (pi->fpregs_dirty) |
2676 | if (parent == NULL || | |
2677 | proc_get_current_thread (parent) != pi->tid) | |
2678 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 2679 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 2680 | __LINE__); |
c906108c | 2681 | #endif |
c906108c | 2682 | |
c3f6f71d | 2683 | if (parent != NULL) |
c906108c | 2684 | { |
c3f6f71d | 2685 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 2686 | Close any file descriptors that it might have open. |
c3f6f71d JM |
2687 | We don't do this to the master (parent) procinfo. */ |
2688 | ||
2689 | close_procinfo_files (pi); | |
c906108c | 2690 | } |
c3f6f71d JM |
2691 | pi->gregs_valid = 0; |
2692 | pi->fpregs_valid = 0; | |
2693 | #if 0 | |
2694 | pi->gregs_dirty = 0; | |
2695 | pi->fpregs_dirty = 0; | |
c906108c | 2696 | #endif |
c3f6f71d JM |
2697 | pi->status_valid = 0; |
2698 | pi->threads_valid = 0; | |
c906108c | 2699 | |
c3f6f71d | 2700 | return 0; |
c906108c SS |
2701 | } |
2702 | ||
0fda6bd2 | 2703 | #if 0 |
77382aee PA |
2704 | /* A callback function for iterate_over_threads. Find the |
2705 | asynchronous signal thread, and make it runnable. See if that | |
2706 | helps matters any. */ | |
c906108c | 2707 | |
c3f6f71d | 2708 | static int |
fba45db2 | 2709 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 2710 | { |
c3f6f71d JM |
2711 | #ifdef PR_ASLWP |
2712 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 2713 | { |
c3f6f71d JM |
2714 | if (!proc_run_process (pi, 0, -1)) |
2715 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
2716 | return 1; | |
c906108c | 2717 | } |
c906108c | 2718 | #endif |
c3f6f71d | 2719 | return 0; |
c906108c | 2720 | } |
0fda6bd2 | 2721 | #endif |
c906108c | 2722 | |
77382aee PA |
2723 | /* Make the child process runnable. Normally we will then call |
2724 | procfs_wait and wait for it to stop again (unless gdb is async). | |
2725 | ||
2726 | If STEP is true, then arrange for the child to stop again after | |
2727 | executing a single instruction. If SIGNO is zero, then cancel any | |
2728 | pending signal; if non-zero, then arrange for the indicated signal | |
2729 | to be delivered to the child when it runs. If PID is -1, then | |
2730 | allow any child thread to run; if non-zero, then allow only the | |
2731 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
2732 | |
2733 | static void | |
28439f5e | 2734 | procfs_resume (struct target_ops *ops, |
2ea28649 | 2735 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 2736 | { |
c3f6f71d JM |
2737 | procinfo *pi, *thread; |
2738 | int native_signo; | |
2739 | ||
19958708 | 2740 | /* 2.1: |
c3f6f71d | 2741 | prrun.prflags |= PRSVADDR; |
19958708 | 2742 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 2743 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 2744 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
2745 | prrun.prflags |= PRCFAULT; clear current fault. |
2746 | ||
2747 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 2748 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
2749 | PRSVADDR is unnecessary. |
2750 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
2751 | This basically leaves PRSTEP and PRCSIG. | |
2752 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
2753 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 2754 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 2755 | |
0df8b418 | 2756 | /* Find procinfo for main process. */ |
dfd4cc63 | 2757 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2758 | |
77382aee | 2759 | /* First cut: ignore pid argument. */ |
c3f6f71d | 2760 | errno = 0; |
c906108c | 2761 | |
c3f6f71d JM |
2762 | /* Convert signal to host numbering. */ |
2763 | if (signo == 0 || | |
a493e3e2 | 2764 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
2765 | native_signo = 0; |
2766 | else | |
2ea28649 | 2767 | native_signo = gdb_signal_to_host (signo); |
c906108c | 2768 | |
c3f6f71d | 2769 | pi->ignore_next_sigstop = 0; |
c906108c | 2770 | |
77382aee PA |
2771 | /* Running the process voids all cached registers and status. */ |
2772 | /* Void the threads' caches first. */ | |
19958708 | 2773 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
2774 | /* Void the process procinfo's caches. */ |
2775 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 2776 | |
dfd4cc63 | 2777 | if (ptid_get_pid (ptid) != -1) |
c906108c | 2778 | { |
77382aee PA |
2779 | /* Resume a specific thread, presumably suppressing the |
2780 | others. */ | |
dfd4cc63 | 2781 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 2782 | if (thread != NULL) |
c906108c | 2783 | { |
c3f6f71d JM |
2784 | if (thread->tid != 0) |
2785 | { | |
77382aee PA |
2786 | /* We're to resume a specific thread, and not the |
2787 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
2788 | if (!proc_set_async (pi)) |
2789 | proc_error (pi, "target_resume, set_async", __LINE__); | |
c3f6f71d | 2790 | #if 0 |
19958708 | 2791 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
2792 | make_signal_thread_runnable, |
2793 | NULL); | |
2794 | #endif | |
0df8b418 MS |
2795 | pi = thread; /* Substitute the thread's procinfo |
2796 | for run. */ | |
c3f6f71d | 2797 | } |
c906108c SS |
2798 | } |
2799 | } | |
c906108c | 2800 | |
c3f6f71d | 2801 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 2802 | { |
c3f6f71d | 2803 | if (errno == EBUSY) |
77382aee PA |
2804 | warning (_("resume: target already running. " |
2805 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
2806 | else |
2807 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 2808 | } |
c3f6f71d | 2809 | } |
c906108c | 2810 | |
77382aee | 2811 | /* Set up to trace signals in the child process. */ |
c906108c | 2812 | |
c3f6f71d | 2813 | static void |
94bedb42 TT |
2814 | procfs_pass_signals (struct target_ops *self, |
2815 | int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 2816 | { |
44122162 | 2817 | sigset_t signals; |
dfd4cc63 | 2818 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 2819 | int signo; |
c906108c | 2820 | |
2455069d UW |
2821 | prfillset (&signals); |
2822 | ||
2823 | for (signo = 0; signo < NSIG; signo++) | |
2824 | { | |
2ea28649 | 2825 | int target_signo = gdb_signal_from_host (signo); |
2455069d | 2826 | if (target_signo < numsigs && pass_signals[target_signo]) |
44122162 | 2827 | prdelset (&signals, signo); |
2455069d UW |
2828 | } |
2829 | ||
2830 | if (!proc_set_traced_signals (pi, &signals)) | |
2831 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 2832 | } |
c906108c | 2833 | |
77382aee | 2834 | /* Print status information about the child process. */ |
c906108c | 2835 | |
c3f6f71d | 2836 | static void |
fba45db2 | 2837 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 2838 | { |
181e7f93 | 2839 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 2840 | |
a3f17187 | 2841 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 2842 | inf->attach_flag? "attached": "child", |
39f77062 | 2843 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 2844 | } |
c906108c | 2845 | |
77382aee PA |
2846 | /* Stop the child process asynchronously, as when the gdb user types |
2847 | control-c or presses a "stop" button. Works by sending | |
2848 | kill(SIGINT) to the child's process group. */ | |
c906108c | 2849 | |
c3f6f71d | 2850 | static void |
bfedc46a | 2851 | procfs_interrupt (struct target_ops *self, ptid_t ptid) |
c3f6f71d | 2852 | { |
7e1789f5 | 2853 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
2854 | } |
2855 | ||
77382aee PA |
2856 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
2857 | should only be applied to the real process, not to an LWP, because | |
2858 | of the check for parent-process. If we need this to work for an | |
2859 | LWP, it needs some more logic. */ | |
c906108c | 2860 | |
c3f6f71d | 2861 | static void |
fba45db2 | 2862 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
2863 | { |
2864 | int parent_pid; | |
c906108c | 2865 | |
c3f6f71d | 2866 | parent_pid = proc_parent_pid (pi); |
c3f6f71d | 2867 | if (!proc_kill (pi, SIGKILL)) |
103b3ef5 | 2868 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d | 2869 | destroy_procinfo (pi); |
c906108c | 2870 | |
c3f6f71d JM |
2871 | /* If pi is GDB's child, wait for it to die. */ |
2872 | if (parent_pid == getpid ()) | |
19958708 | 2873 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
2874 | Should we check the returned event? */ |
2875 | { | |
0d06e24b | 2876 | #if 0 |
c3f6f71d | 2877 | int status, ret; |
c906108c | 2878 | |
c3f6f71d JM |
2879 | ret = waitpid (pi->pid, &status, 0); |
2880 | #else | |
2881 | wait (NULL); | |
2882 | #endif | |
2883 | } | |
2884 | } | |
c906108c | 2885 | |
77382aee PA |
2886 | /* We're done debugging it, and we want it to go away. Then we want |
2887 | GDB to forget all about it. */ | |
c906108c | 2888 | |
19958708 | 2889 | static void |
7d85a9c0 | 2890 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 2891 | { |
39f77062 | 2892 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 2893 | { |
0df8b418 | 2894 | /* Find procinfo for main process. */ |
dfd4cc63 | 2895 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 2896 | |
c3f6f71d JM |
2897 | if (pi) |
2898 | unconditionally_kill_inferior (pi); | |
bc1e6c81 | 2899 | target_mourn_inferior (inferior_ptid); |
c906108c | 2900 | } |
c3f6f71d JM |
2901 | } |
2902 | ||
77382aee | 2903 | /* Forget we ever debugged this thing! */ |
c906108c | 2904 | |
19958708 | 2905 | static void |
136d6dae | 2906 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
2907 | { |
2908 | procinfo *pi; | |
c906108c | 2909 | |
39f77062 | 2910 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 2911 | { |
0df8b418 | 2912 | /* Find procinfo for main process. */ |
dfd4cc63 | 2913 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2914 | if (pi) |
2915 | destroy_procinfo (pi); | |
c906108c | 2916 | } |
6a3cb8e8 PA |
2917 | |
2918 | generic_mourn_inferior (); | |
8181d85f | 2919 | |
6a3cb8e8 | 2920 | inf_child_maybe_unpush_target (ops); |
c3f6f71d | 2921 | } |
c906108c | 2922 | |
77382aee PA |
2923 | /* When GDB forks to create a runnable inferior process, this function |
2924 | is called on the parent side of the fork. It's job is to do | |
2925 | whatever is necessary to make the child ready to be debugged, and | |
2926 | then wait for the child to synchronize. */ | |
c906108c | 2927 | |
19958708 | 2928 | static void |
28439f5e | 2929 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
2930 | { |
2931 | procinfo *pi; | |
44122162 | 2932 | sigset_t signals; |
c3f6f71d | 2933 | int fail; |
2689673f | 2934 | int lwpid; |
c906108c | 2935 | |
c3f6f71d JM |
2936 | /* This routine called on the parent side (GDB side) |
2937 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
2938 | if (!target_is_pushed (ops)) |
2939 | push_target (ops); | |
c906108c | 2940 | |
c3f6f71d | 2941 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 2942 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
2943 | |
2944 | if (!open_procinfo_files (pi, FD_CTL)) | |
2945 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
2946 | ||
2947 | /* | |
2948 | xmalloc // done | |
2949 | open_procinfo_files // done | |
2950 | link list // done | |
2951 | prfillset (trace) | |
2952 | procfs_notice_signals | |
2953 | prfillset (fault) | |
2954 | prdelset (FLTPAGE) | |
2955 | PIOCWSTOP | |
2956 | PIOCSFAULT | |
2957 | */ | |
2958 | ||
77382aee | 2959 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
2960 | if (!(proc_flags (pi) & PR_STOPPED) && |
2961 | !(proc_wait_for_stop (pi))) | |
2962 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
2963 | ||
2964 | /* Save some of the /proc state to be restored if we detach. */ | |
2965 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 2966 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
2967 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
2968 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
2969 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2970 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
2971 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2972 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 2973 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 2974 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 2975 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2976 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
2977 | ||
c3f6f71d JM |
2978 | if ((fail = procfs_debug_inferior (pi)) != 0) |
2979 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
2980 | ||
0d06e24b JM |
2981 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
2982 | and possibly even turning ON kill-on-last-close at this point. But | |
2983 | I can't make that change without careful testing which I don't have | |
2984 | time to do right now... */ | |
c3f6f71d JM |
2985 | /* Turn on run-on-last-close flag so that the child |
2986 | will die if GDB goes away for some reason. */ | |
2987 | if (!proc_set_run_on_last_close (pi)) | |
2988 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
2989 | ||
2689673f PA |
2990 | /* We now have have access to the lwpid of the main thread/lwp. */ |
2991 | lwpid = proc_get_current_thread (pi); | |
2992 | ||
2993 | /* Create a procinfo for the main lwp. */ | |
2994 | create_procinfo (pid, lwpid); | |
2995 | ||
2996 | /* We already have a main thread registered in the thread table at | |
2997 | this point, but it didn't have any lwp info yet. Notify the core | |
2998 | about it. This changes inferior_ptid as well. */ | |
2999 | thread_change_ptid (pid_to_ptid (pid), | |
793e1c06 | 3000 | ptid_build (pid, lwpid, 0)); |
c906108c | 3001 | |
2090129c | 3002 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c3f6f71d | 3003 | } |
c906108c | 3004 | |
77382aee PA |
3005 | /* When GDB forks to create a new process, this function is called on |
3006 | the child side of the fork before GDB exec's the user program. Its | |
3007 | job is to make the child minimally debuggable, so that the parent | |
3008 | GDB process can connect to the child and take over. This function | |
3009 | should do only the minimum to make that possible, and to | |
3010 | synchronize with the parent process. The parent process should | |
3011 | take care of the details. */ | |
c3f6f71d JM |
3012 | |
3013 | static void | |
fba45db2 | 3014 | procfs_set_exec_trap (void) |
c3f6f71d JM |
3015 | { |
3016 | /* This routine called on the child side (inferior side) | |
3017 | after GDB forks the inferior. It must use only local variables, | |
3018 | because it may be sharing data space with its parent. */ | |
c906108c | 3019 | |
c3f6f71d | 3020 | procinfo *pi; |
37de36c6 | 3021 | sysset_t *exitset; |
c906108c | 3022 | |
c3f6f71d | 3023 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 3024 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 3025 | |
c3f6f71d JM |
3026 | if (open_procinfo_files (pi, FD_CTL) == 0) |
3027 | { | |
3028 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
3029 | gdb_flush (gdb_stderr); | |
77382aee PA |
3030 | /* No need to call "dead_procinfo", because we're going to |
3031 | exit. */ | |
c3f6f71d JM |
3032 | _exit (127); |
3033 | } | |
c906108c | 3034 | |
44122162 | 3035 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
3036 | /* GW: Rationale... |
3037 | Not all systems with /proc have all the exec* syscalls with the same | |
3038 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 3039 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 3040 | |
37de36c6 | 3041 | exitset = sysset_t_alloc (pi); |
44122162 | 3042 | premptyset (exitset); |
c3f6f71d | 3043 | #ifdef SYS_exec |
44122162 | 3044 | praddset (exitset, SYS_exec); |
c906108c | 3045 | #endif |
44122162 | 3046 | praddset (exitset, SYS_execve); |
37de36c6 KB |
3047 | |
3048 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 3049 | { |
c3f6f71d JM |
3050 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
3051 | gdb_flush (gdb_stderr); | |
3052 | _exit (127); | |
c906108c | 3053 | } |
c3f6f71d | 3054 | |
0df8b418 | 3055 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
3056 | /* Turn off inherit on fork flag so that all grand-children |
3057 | of gdb start with tracing flags cleared. */ | |
3058 | if (!proc_unset_inherit_on_fork (pi)) | |
3059 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
3060 | ||
3061 | /* Turn off run on last close flag, so that the child process | |
3062 | cannot run away just because we close our handle on it. | |
3063 | We want it to wait for the parent to attach. */ | |
3064 | if (!proc_unset_run_on_last_close (pi)) | |
3065 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
3066 | ||
19958708 | 3067 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 3068 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 3069 | /*destroy_procinfo (pi);*/ |
c906108c | 3070 | } |
c906108c | 3071 | |
77382aee PA |
3072 | /* This function is called BEFORE gdb forks the inferior process. Its |
3073 | only real responsibility is to set things up for the fork, and tell | |
3074 | GDB which two functions to call after the fork (one for the parent, | |
3075 | and one for the child). | |
3076 | ||
3077 | This function does a complicated search for a unix shell program, | |
3078 | which it then uses to parse arguments and environment variables to | |
3079 | be sent to the child. I wonder whether this code could not be | |
3080 | abstracted out and shared with other unix targets such as | |
3081 | inf-ptrace? */ | |
c906108c SS |
3082 | |
3083 | static void | |
7c5ded6a SDJ |
3084 | procfs_create_inferior (struct target_ops *ops, const char *exec_file, |
3085 | const std::string &allargs, char **env, int from_tty) | |
c906108c SS |
3086 | { |
3087 | char *shell_file = getenv ("SHELL"); | |
3088 | char *tryname; | |
28439f5e PA |
3089 | int pid; |
3090 | ||
c906108c SS |
3091 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
3092 | { | |
3093 | ||
3094 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
3095 | just do this the normal way (via execlp, which operates by |
3096 | attempting an exec for each element of the PATH until it | |
3097 | finds one which succeeds), then there will be an exec for | |
3098 | each failed attempt, each of which will cause a PR_SYSEXIT | |
3099 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
3100 | for these failed execs with the ones for successful execs | |
3101 | (whether the exec has succeeded is stored at that time in the | |
3102 | carry bit or some such architecture-specific and | |
3103 | non-ABI-specified place). | |
3104 | ||
3105 | So I can't think of anything better than to search the PATH | |
3106 | now. This has several disadvantages: (1) There is a race | |
3107 | condition; if we find a file now and it is deleted before we | |
3108 | exec it, we lose, even if the deletion leaves a valid file | |
3109 | further down in the PATH, (2) there is no way to know exactly | |
3110 | what an executable (in the sense of "capable of being | |
3111 | exec'd") file is. Using access() loses because it may lose | |
3112 | if the caller is the superuser; failing to use it loses if | |
3113 | there are ACLs or some such. */ | |
c906108c | 3114 | |
995816ba PA |
3115 | const char *p; |
3116 | const char *p1; | |
c906108c | 3117 | /* FIXME-maybe: might want "set path" command so user can change what |
c3f6f71d | 3118 | path is used from within GDB. */ |
995816ba | 3119 | const char *path = getenv ("PATH"); |
c906108c SS |
3120 | int len; |
3121 | struct stat statbuf; | |
3122 | ||
3123 | if (path == NULL) | |
3124 | path = "/bin:/usr/bin"; | |
3125 | ||
b196bc4c | 3126 | tryname = (char *) alloca (strlen (path) + strlen (shell_file) + 2); |
c3f6f71d | 3127 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
3128 | { |
3129 | p1 = strchr (p, ':'); | |
3130 | if (p1 != NULL) | |
3131 | len = p1 - p; | |
3132 | else | |
3133 | len = strlen (p); | |
3134 | strncpy (tryname, p, len); | |
3135 | tryname[len] = '\0'; | |
3136 | strcat (tryname, "/"); | |
3137 | strcat (tryname, shell_file); | |
3138 | if (access (tryname, X_OK) < 0) | |
3139 | continue; | |
3140 | if (stat (tryname, &statbuf) < 0) | |
3141 | continue; | |
3142 | if (!S_ISREG (statbuf.st_mode)) | |
3143 | /* We certainly need to reject directories. I'm not quite | |
3144 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
3145 | that people want to exec() these things. */ | |
3146 | continue; | |
3147 | break; | |
3148 | } | |
3149 | if (p == NULL) | |
3150 | /* Not found. This must be an error rather than merely passing | |
3151 | the file to execlp(), because execlp() would try all the | |
3152 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 3153 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 3154 | __LINE__, shell_file); |
c906108c SS |
3155 | |
3156 | shell_file = tryname; | |
3157 | } | |
3158 | ||
28439f5e | 3159 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 3160 | NULL, NULL, shell_file, NULL); |
28439f5e | 3161 | |
2090129c SDJ |
3162 | /* We have something that executes now. We'll be running through |
3163 | the shell at this point (if startup-with-shell is true), but the | |
3164 | pid shouldn't change. */ | |
3165 | add_thread_silent (pid_to_ptid (pid)); | |
3166 | ||
28439f5e | 3167 | procfs_init_inferior (ops, pid); |
27087a3d JB |
3168 | } |
3169 | ||
3170 | /* An observer for the "inferior_created" event. */ | |
c906108c | 3171 | |
27087a3d JB |
3172 | static void |
3173 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
3174 | { | |
c906108c SS |
3175 | } |
3176 | ||
e8032dde | 3177 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 3178 | |
c3f6f71d | 3179 | static int |
fba45db2 | 3180 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 3181 | { |
dfd4cc63 | 3182 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 3183 | |
2689673f | 3184 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 3185 | add_thread (gdb_threadid); |
c906108c | 3186 | |
c3f6f71d JM |
3187 | return 0; |
3188 | } | |
3189 | ||
77382aee PA |
3190 | /* Query all the threads that the target knows about, and give them |
3191 | back to GDB to add to its list. */ | |
c3f6f71d | 3192 | |
d3581e61 | 3193 | static void |
e8032dde | 3194 | procfs_update_thread_list (struct target_ops *ops) |
c3f6f71d JM |
3195 | { |
3196 | procinfo *pi; | |
3197 | ||
e8032dde PA |
3198 | prune_threads (); |
3199 | ||
0df8b418 | 3200 | /* Find procinfo for main process. */ |
dfd4cc63 | 3201 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3202 | proc_update_threads (pi); |
3203 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
3204 | } |
3205 | ||
77382aee PA |
3206 | /* Return true if the thread is still 'alive'. This guy doesn't |
3207 | really seem to be doing his job. Got to investigate how to tell | |
3208 | when a thread is really gone. */ | |
c906108c | 3209 | |
c906108c | 3210 | static int |
28439f5e | 3211 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 3212 | { |
c3f6f71d JM |
3213 | int proc, thread; |
3214 | procinfo *pi; | |
c906108c | 3215 | |
dfd4cc63 LM |
3216 | proc = ptid_get_pid (ptid); |
3217 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 3218 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
3219 | if ((pi = find_procinfo (proc, thread)) == NULL) |
3220 | return 0; | |
3221 | ||
3222 | /* If I can't get its status, it ain't alive! | |
3223 | What's more, I need to forget about it! */ | |
3224 | if (!proc_get_status (pi)) | |
3225 | { | |
3226 | destroy_procinfo (pi); | |
3227 | return 0; | |
3228 | } | |
77382aee PA |
3229 | /* I couldn't have got its status if it weren't alive, so it's |
3230 | alive. */ | |
c3f6f71d | 3231 | return 1; |
c906108c | 3232 | } |
c3f6f71d | 3233 | |
77382aee PA |
3234 | /* Convert PTID to a string. Returns the string in a static |
3235 | buffer. */ | |
c3f6f71d | 3236 | |
7a114964 | 3237 | static const char * |
117de6a9 | 3238 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
3239 | { |
3240 | static char buf[80]; | |
c3f6f71d | 3241 | |
dfd4cc63 LM |
3242 | if (ptid_get_lwp (ptid) == 0) |
3243 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 3244 | else |
dfd4cc63 | 3245 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
3246 | |
3247 | return buf; | |
c3f6f71d JM |
3248 | } |
3249 | ||
77382aee | 3250 | /* Insert a watchpoint. */ |
c3f6f71d | 3251 | |
a0911fd0 | 3252 | static int |
39f77062 | 3253 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 3254 | int after) |
c906108c | 3255 | { |
c3f6f71d | 3256 | int pflags = 0; |
19958708 | 3257 | procinfo *pi; |
c3f6f71d | 3258 | |
dfd4cc63 LM |
3259 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
3260 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
3261 | 0); | |
c3f6f71d | 3262 | |
0df8b418 MS |
3263 | /* Translate from GDB's flags to /proc's. */ |
3264 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 3265 | { |
0df8b418 | 3266 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
3267 | case hw_write: /* default watchpoint (write) */ |
3268 | pflags = WRITE_WATCHFLAG; | |
3269 | break; | |
3270 | case hw_read: /* read watchpoint */ | |
3271 | pflags = READ_WATCHFLAG; | |
3272 | break; | |
3273 | case hw_access: /* access watchpoint */ | |
3274 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
3275 | break; | |
3276 | case hw_execute: /* execution HW breakpoint */ | |
3277 | pflags = EXEC_WATCHFLAG; | |
3278 | break; | |
0df8b418 | 3279 | default: /* Something weird. Return error. */ |
c906108c | 3280 | return -1; |
c3f6f71d | 3281 | } |
0df8b418 | 3282 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
3283 | pflags |= AFTER_WATCHFLAG; |
3284 | } | |
3285 | ||
3286 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
3287 | { | |
0df8b418 | 3288 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
3289 | return -1; /* fail */ |
3290 | /* GDB may try to remove the same watchpoint twice. | |
3291 | If a remove request returns no match, don't error. */ | |
c906108c | 3292 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
3293 | return 0; /* ignore */ |
3294 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c SS |
3295 | } |
3296 | return 0; | |
3297 | } | |
3298 | ||
1e03ad20 KB |
3299 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
3300 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
3301 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
3302 | far. | |
19958708 | 3303 | |
1e03ad20 KB |
3304 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
3305 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 3306 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
3307 | |
3308 | static int | |
5461485a | 3309 | procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f SM |
3310 | enum bptype type, |
3311 | int cnt, int othertype) | |
1e03ad20 | 3312 | { |
1e03ad20 KB |
3313 | /* Due to the way that proc_set_watchpoint() is implemented, host |
3314 | and target pointers must be of the same size. If they are not, | |
3315 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
3316 | fact that proc_set_watchpoint() calls |
3317 | procfs_address_to_host_pointer(); a close inspection of | |
3318 | procfs_address_to_host_pointer will reveal that an internal error | |
3319 | will be generated when the host and target pointer sizes are | |
3320 | different. */ | |
f5656ead | 3321 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 3322 | |
4e906f53 | 3323 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
3324 | return 0; |
3325 | ||
3326 | /* Other tests here??? */ | |
3327 | ||
3328 | return 1; | |
1e03ad20 KB |
3329 | } |
3330 | ||
77382aee PA |
3331 | /* Returns non-zero if process is stopped on a hardware watchpoint |
3332 | fault, else returns zero. */ | |
c3f6f71d | 3333 | |
25513619 | 3334 | static int |
6a109b6b | 3335 | procfs_stopped_by_watchpoint (struct target_ops *ops) |
c906108c | 3336 | { |
c3f6f71d | 3337 | procinfo *pi; |
c906108c | 3338 | |
dfd4cc63 | 3339 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 3340 | |
c3f6f71d | 3341 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3342 | { |
c3f6f71d | 3343 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 3344 | { |
c3f6f71d JM |
3345 | if (proc_what (pi) == FLTWATCH) |
3346 | return 1; | |
c3f6f71d | 3347 | } |
c906108c SS |
3348 | } |
3349 | return 0; | |
3350 | } | |
c906108c | 3351 | |
77382aee PA |
3352 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
3353 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
3354 | address. This function is only called if | |
3355 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
3356 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
3357 | |
3358 | static int | |
3359 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
3360 | { | |
3361 | procinfo *pi; | |
3362 | ||
dfd4cc63 | 3363 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
3364 | return proc_watchpoint_address (pi, addr); |
3365 | } | |
3366 | ||
25513619 | 3367 | static int |
7bb99c53 | 3368 | procfs_insert_watchpoint (struct target_ops *self, |
f486487f SM |
3369 | CORE_ADDR addr, int len, |
3370 | enum target_hw_bp_type type, | |
0cf6dd15 | 3371 | struct expression *cond) |
25513619 | 3372 | { |
d92524f1 | 3373 | if (!target_have_steppable_watchpoint |
f5656ead | 3374 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
3375 | { |
3376 | /* When a hardware watchpoint fires off the PC will be left at | |
3377 | the instruction following the one which caused the | |
3378 | watchpoint. It will *NOT* be necessary for GDB to step over | |
3379 | the watchpoint. */ | |
3380 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
3381 | } | |
3382 | else | |
3383 | { | |
3384 | /* When a hardware watchpoint fires off the PC will be left at | |
3385 | the instruction which caused the watchpoint. It will be | |
3386 | necessary for GDB to step over the watchpoint. */ | |
3387 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
3388 | } | |
3389 | } | |
3390 | ||
3391 | static int | |
11b5219a | 3392 | procfs_remove_watchpoint (struct target_ops *self, |
f486487f SM |
3393 | CORE_ADDR addr, int len, |
3394 | enum target_hw_bp_type type, | |
0cf6dd15 | 3395 | struct expression *cond) |
25513619 PA |
3396 | { |
3397 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
3398 | } | |
3399 | ||
3400 | static int | |
31568a15 TT |
3401 | procfs_region_ok_for_hw_watchpoint (struct target_ops *self, |
3402 | CORE_ADDR addr, int len) | |
25513619 PA |
3403 | { |
3404 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
3405 | system can support "thousands" of hardware watchpoints, but gives | |
3406 | no method for finding out how many; It doesn't say anything about | |
3407 | the allowed size for the watched area either. So we just tell | |
3408 | GDB 'yes'. */ | |
3409 | return 1; | |
3410 | } | |
3411 | ||
3412 | void | |
3413 | procfs_use_watchpoints (struct target_ops *t) | |
3414 | { | |
3415 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
3416 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
3417 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
3418 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 3419 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 3420 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
3421 | } |
3422 | ||
77382aee PA |
3423 | /* Memory Mappings Functions: */ |
3424 | ||
3425 | /* Call a callback function once for each mapping, passing it the | |
3426 | mapping, an optional secondary callback function, and some optional | |
3427 | opaque data. Quit and return the first non-zero value returned | |
3428 | from the callback. | |
3429 | ||
3430 | PI is the procinfo struct for the process to be mapped. FUNC is | |
3431 | the callback function to be called by this iterator. DATA is the | |
3432 | optional opaque data to be passed to the callback function. | |
3433 | CHILD_FUNC is the optional secondary function pointer to be passed | |
3434 | to the child function. Returns the first non-zero return value | |
3435 | from the callback function, or zero. */ | |
831e682e MS |
3436 | |
3437 | static int | |
b8edc417 | 3438 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 3439 | void *data, |
19958708 | 3440 | int (*func) (struct prmap *map, |
b8edc417 | 3441 | find_memory_region_ftype child_func, |
831e682e MS |
3442 | void *data)) |
3443 | { | |
3444 | char pathname[MAX_PROC_NAME_SIZE]; | |
3445 | struct prmap *prmaps; | |
3446 | struct prmap *prmap; | |
3447 | int funcstat; | |
3448 | int map_fd; | |
3449 | int nmap; | |
0a86f364 | 3450 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e | 3451 | struct stat sbuf; |
831e682e | 3452 | |
19958708 | 3453 | /* Get the number of mappings, allocate space, |
831e682e | 3454 | and read the mappings into prmaps. */ |
0df8b418 | 3455 | /* Open map fd. */ |
831e682e MS |
3456 | sprintf (pathname, "/proc/%d/map", pi->pid); |
3457 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
3458 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
3459 | ||
0df8b418 | 3460 | /* Make sure it gets closed again. */ |
831e682e MS |
3461 | make_cleanup_close (map_fd); |
3462 | ||
19958708 | 3463 | /* Use stat to determine the file size, and compute |
831e682e MS |
3464 | the number of prmap_t objects it contains. */ |
3465 | if (fstat (map_fd, &sbuf) != 0) | |
3466 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
3467 | ||
3468 | nmap = sbuf.st_size / sizeof (prmap_t); | |
3469 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
3470 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
3471 | != (nmap * sizeof (*prmaps))) | |
3472 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
831e682e MS |
3473 | |
3474 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
3475 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
3476 | { |
3477 | do_cleanups (cleanups); | |
3478 | return funcstat; | |
3479 | } | |
831e682e | 3480 | |
0a86f364 | 3481 | do_cleanups (cleanups); |
831e682e MS |
3482 | return 0; |
3483 | } | |
3484 | ||
77382aee | 3485 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 3486 | function for each memory region. |
77382aee | 3487 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
3488 | |
3489 | static int | |
19958708 | 3490 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 3491 | find_memory_region_ftype func, void *data) |
be4d1333 | 3492 | { |
bf75638e | 3493 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 3494 | map->pr_size, |
be4d1333 MS |
3495 | (map->pr_mflags & MA_READ) != 0, |
3496 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 3497 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 3498 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
3499 | data); |
3500 | } | |
3501 | ||
77382aee PA |
3502 | /* External interface. Calls a callback function once for each |
3503 | mapped memory region in the child process, passing as arguments: | |
3504 | ||
3505 | CORE_ADDR virtual_address, | |
3506 | unsigned long size, | |
3507 | int read, TRUE if region is readable by the child | |
3508 | int write, TRUE if region is writable by the child | |
3509 | int execute TRUE if region is executable by the child. | |
3510 | ||
3511 | Stops iterating and returns the first non-zero value returned by | |
3512 | the callback. */ | |
be4d1333 MS |
3513 | |
3514 | static int | |
2e73927c TT |
3515 | proc_find_memory_regions (struct target_ops *self, |
3516 | find_memory_region_ftype func, void *data) | |
be4d1333 | 3517 | { |
dfd4cc63 | 3518 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3519 | |
19958708 | 3520 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
3521 | find_memory_regions_callback); |
3522 | } | |
3523 | ||
77382aee | 3524 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 3525 | |
388faa48 | 3526 | static char * |
5ae5f592 | 3527 | mappingflags (long flags) |
388faa48 MS |
3528 | { |
3529 | static char asciiflags[8]; | |
3530 | ||
3531 | strcpy (asciiflags, "-------"); | |
388faa48 MS |
3532 | if (flags & MA_STACK) |
3533 | asciiflags[1] = 's'; | |
3534 | if (flags & MA_BREAK) | |
3535 | asciiflags[2] = 'b'; | |
3536 | if (flags & MA_SHARED) | |
3537 | asciiflags[3] = 's'; | |
3538 | if (flags & MA_READ) | |
3539 | asciiflags[4] = 'r'; | |
3540 | if (flags & MA_WRITE) | |
3541 | asciiflags[5] = 'w'; | |
3542 | if (flags & MA_EXEC) | |
3543 | asciiflags[6] = 'x'; | |
3544 | return (asciiflags); | |
3545 | } | |
3546 | ||
77382aee PA |
3547 | /* Callback function, does the actual work for 'info proc |
3548 | mappings'. */ | |
831e682e | 3549 | |
831e682e | 3550 | static int |
b8edc417 | 3551 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 3552 | void *unused) |
831e682e | 3553 | { |
0b62613e | 3554 | unsigned int pr_off; |
831e682e | 3555 | |
0b62613e | 3556 | pr_off = (unsigned int) map->pr_offset; |
0b62613e | 3557 | |
f5656ead | 3558 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 3559 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
3560 | (unsigned long) map->pr_vaddr, |
3561 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3562 | (unsigned long) map->pr_size, |
0b62613e PA |
3563 | pr_off, |
3564 | mappingflags (map->pr_mflags)); | |
3565 | else | |
f6a96b83 | 3566 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
3567 | (unsigned long) map->pr_vaddr, |
3568 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3569 | (unsigned long) map->pr_size, |
0b62613e PA |
3570 | pr_off, |
3571 | mappingflags (map->pr_mflags)); | |
831e682e MS |
3572 | |
3573 | return 0; | |
3574 | } | |
3575 | ||
77382aee | 3576 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
3577 | |
3578 | static void | |
3579 | info_proc_mappings (procinfo *pi, int summary) | |
3580 | { | |
388faa48 | 3581 | if (summary) |
0df8b418 | 3582 | return; /* No output for summary mode. */ |
388faa48 | 3583 | |
a3f17187 | 3584 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 3585 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
3586 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
3587 | "Start Addr", | |
3588 | " End Addr", | |
3589 | " Size", | |
3590 | " Offset", | |
3591 | "Flags"); | |
3592 | else | |
3593 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3594 | "Start Addr", | |
3595 | " End Addr", | |
3596 | " Size", | |
3597 | " Offset", | |
3598 | "Flags"); | |
388faa48 | 3599 | |
831e682e | 3600 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
3601 | printf_filtered ("\n"); |
3602 | } | |
3603 | ||
77382aee | 3604 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
3605 | |
3606 | static void | |
7bc112c1 | 3607 | procfs_info_proc (struct target_ops *ops, const char *args, |
145b16a9 | 3608 | enum info_proc_what what) |
c906108c | 3609 | { |
c3f6f71d | 3610 | struct cleanup *old_chain; |
388faa48 MS |
3611 | procinfo *process = NULL; |
3612 | procinfo *thread = NULL; | |
388faa48 MS |
3613 | char *tmp = NULL; |
3614 | int pid = 0; | |
3615 | int tid = 0; | |
3616 | int mappings = 0; | |
c906108c | 3617 | |
145b16a9 UW |
3618 | switch (what) |
3619 | { | |
3620 | case IP_MINIMAL: | |
3621 | break; | |
3622 | ||
3623 | case IP_MAPPINGS: | |
3624 | case IP_ALL: | |
3625 | mappings = 1; | |
3626 | break; | |
3627 | ||
3628 | default: | |
3629 | error (_("Not supported on this target.")); | |
3630 | } | |
3631 | ||
c3f6f71d | 3632 | old_chain = make_cleanup (null_cleanup, 0); |
773a1edc | 3633 | gdb_argv built_argv (args); |
4fa7574e | 3634 | for (char *arg : built_argv) |
c3f6f71d | 3635 | { |
773a1edc | 3636 | if (isdigit (arg[0])) |
c3f6f71d | 3637 | { |
773a1edc | 3638 | pid = strtoul (arg, &tmp, 10); |
c3f6f71d JM |
3639 | if (*tmp == '/') |
3640 | tid = strtoul (++tmp, NULL, 10); | |
3641 | } | |
773a1edc | 3642 | else if (arg[0] == '/') |
c3f6f71d | 3643 | { |
773a1edc | 3644 | tid = strtoul (arg + 1, NULL, 10); |
c3f6f71d | 3645 | } |
c3f6f71d JM |
3646 | } |
3647 | if (pid == 0) | |
dfd4cc63 | 3648 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 3649 | if (pid == 0) |
8a3fe4f8 | 3650 | error (_("No current process: you must name one.")); |
c3f6f71d | 3651 | else |
c906108c | 3652 | { |
c3f6f71d | 3653 | /* Have pid, will travel. |
0df8b418 | 3654 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
3655 | process = find_procinfo (pid, 0); |
3656 | if (process == NULL) | |
3657 | { | |
19958708 | 3658 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
3659 | remember to close it again when finished. */ |
3660 | process = create_procinfo (pid, 0); | |
004527cb | 3661 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
3662 | if (!open_procinfo_files (process, FD_CTL)) |
3663 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
3664 | } | |
c906108c | 3665 | } |
c3f6f71d JM |
3666 | if (tid != 0) |
3667 | thread = create_procinfo (pid, tid); | |
3668 | ||
3669 | if (process) | |
3670 | { | |
a3f17187 | 3671 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
3672 | proc_prettyprint_flags (proc_flags (process), 1); |
3673 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
3674 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
3675 | if (proc_get_nthreads (process) > 1) | |
19958708 | 3676 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
3677 | proc_get_nthreads (process)); |
3678 | } | |
3679 | if (thread) | |
3680 | { | |
a3f17187 | 3681 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
3682 | proc_prettyprint_flags (proc_flags (thread), 1); |
3683 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
3684 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
3685 | } | |
3686 | ||
388faa48 MS |
3687 | if (mappings) |
3688 | { | |
3689 | info_proc_mappings (process, 0); | |
3690 | } | |
3691 | ||
c3f6f71d | 3692 | do_cleanups (old_chain); |
c906108c SS |
3693 | } |
3694 | ||
9185ddce JB |
3695 | /* Modify the status of the system call identified by SYSCALLNUM in |
3696 | the set of syscalls that are currently traced/debugged. | |
3697 | ||
3698 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 3699 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 3700 | |
0df8b418 | 3701 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
3702 | will be disabled. */ |
3703 | ||
3704 | static void | |
3705 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 3706 | int mode, int from_tty) |
9185ddce JB |
3707 | { |
3708 | sysset_t *sysset; | |
77382aee | 3709 | |
9185ddce JB |
3710 | if (entry_or_exit == PR_SYSENTRY) |
3711 | sysset = proc_get_traced_sysentry (pi, NULL); | |
3712 | else | |
3713 | sysset = proc_get_traced_sysexit (pi, NULL); | |
3714 | ||
3715 | if (sysset == NULL) | |
3716 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
3717 | ||
3718 | if (mode == FLAG_SET) | |
44122162 | 3719 | praddset (sysset, syscallnum); |
9185ddce | 3720 | else |
44122162 | 3721 | prdelset (sysset, syscallnum); |
9185ddce JB |
3722 | |
3723 | if (entry_or_exit == PR_SYSENTRY) | |
3724 | { | |
3725 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 3726 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
3727 | } |
3728 | else | |
3729 | { | |
3730 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 3731 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
3732 | } |
3733 | } | |
3734 | ||
c3f6f71d | 3735 | static void |
0b39b52e | 3736 | proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 3737 | { |
c3f6f71d | 3738 | procinfo *pi; |
c906108c | 3739 | |
dfd4cc63 | 3740 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 3741 | error (_("you must be debugging a process to use this command.")); |
c906108c | 3742 | |
c3f6f71d | 3743 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 3744 | error_no_arg (_("system call to trace")); |
c3f6f71d | 3745 | |
dfd4cc63 | 3746 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3747 | if (isdigit (args[0])) |
3748 | { | |
9185ddce | 3749 | const int syscallnum = atoi (args); |
c906108c | 3750 | |
9185ddce | 3751 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
3752 | } |
3753 | } | |
3754 | ||
19958708 | 3755 | static void |
0b39b52e | 3756 | proc_trace_sysentry_cmd (const char *args, int from_tty) |
c906108c | 3757 | { |
c3f6f71d JM |
3758 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
3759 | } | |
c906108c | 3760 | |
19958708 | 3761 | static void |
0b39b52e | 3762 | proc_trace_sysexit_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3763 | { |
3764 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 3765 | } |
c906108c | 3766 | |
19958708 | 3767 | static void |
0b39b52e | 3768 | proc_untrace_sysentry_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3769 | { |
3770 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
3771 | } | |
3772 | ||
19958708 | 3773 | static void |
0b39b52e | 3774 | proc_untrace_sysexit_cmd (const char *args, int from_tty) |
c906108c | 3775 | { |
c3f6f71d JM |
3776 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
3777 | } | |
c906108c | 3778 | |
c906108c | 3779 | void |
fba45db2 | 3780 | _initialize_procfs (void) |
c906108c | 3781 | { |
27087a3d JB |
3782 | observer_attach_inferior_created (procfs_inferior_created); |
3783 | ||
19958708 | 3784 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 3785 | _("Give a trace of entries into the syscall.")); |
19958708 | 3786 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 3787 | _("Give a trace of exits from the syscall.")); |
19958708 | 3788 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 3789 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 3790 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 3791 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
3792 | } |
3793 | ||
3794 | /* =================== END, GDB "MODULE" =================== */ | |
3795 | ||
3796 | ||
3797 | ||
77382aee PA |
3798 | /* miscellaneous stubs: */ |
3799 | ||
3800 | /* The following satisfy a few random symbols mostly created by the | |
3801 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 3802 | |
77382aee PA |
3803 | /* Return a pid for which we guarantee we will be able to find a |
3804 | 'live' procinfo. */ | |
c3f6f71d | 3805 | |
39f77062 | 3806 | ptid_t |
fba45db2 | 3807 | procfs_first_available (void) |
c3f6f71d | 3808 | { |
39f77062 | 3809 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 3810 | } |
be4d1333 MS |
3811 | |
3812 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
3813 | ||
3814 | static char * | |
19958708 | 3815 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 3816 | char *note_data, int *note_size, |
2ea28649 | 3817 | enum gdb_signal stop_signal) |
be4d1333 | 3818 | { |
594f7785 | 3819 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
3820 | gdb_gregset_t gregs; |
3821 | gdb_fpregset_t fpregs; | |
3822 | unsigned long merged_pid; | |
3823 | ||
dfd4cc63 | 3824 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 3825 | |
75125405 DJ |
3826 | /* This part is the old method for fetching registers. |
3827 | It should be replaced by the newer one using regsets | |
3828 | once it is implemented in this platform: | |
29082443 | 3829 | gdbarch_iterate_over_regset_sections(). */ |
75125405 | 3830 | |
2989a365 | 3831 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
75125405 DJ |
3832 | inferior_ptid = ptid; |
3833 | target_fetch_registers (regcache, -1); | |
3834 | ||
594f7785 | 3835 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
3836 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
3837 | note_data, | |
3838 | note_size, | |
19958708 | 3839 | merged_pid, |
65554fef MS |
3840 | stop_signal, |
3841 | &gregs); | |
594f7785 | 3842 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
3843 | note_data = (char *) elfcore_write_prfpreg (obfd, |
3844 | note_data, | |
3845 | note_size, | |
3846 | &fpregs, | |
3847 | sizeof (fpregs)); | |
75125405 | 3848 | |
be4d1333 MS |
3849 | return note_data; |
3850 | } | |
3851 | ||
3852 | struct procfs_corefile_thread_data { | |
3853 | bfd *obfd; | |
3854 | char *note_data; | |
3855 | int *note_size; | |
2ea28649 | 3856 | enum gdb_signal stop_signal; |
be4d1333 MS |
3857 | }; |
3858 | ||
3859 | static int | |
65554fef | 3860 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 | 3861 | { |
b196bc4c RO |
3862 | struct procfs_corefile_thread_data *args |
3863 | = (struct procfs_corefile_thread_data *) data; | |
be4d1333 | 3864 | |
2689673f | 3865 | if (pi != NULL) |
be4d1333 | 3866 | { |
dfd4cc63 | 3867 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 3868 | |
75125405 | 3869 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 3870 | args->note_data, |
2020b7ab PA |
3871 | args->note_size, |
3872 | args->stop_signal); | |
be4d1333 MS |
3873 | } |
3874 | return 0; | |
3875 | } | |
3876 | ||
a223f1e7 JB |
3877 | static int |
3878 | find_signalled_thread (struct thread_info *info, void *data) | |
3879 | { | |
a493e3e2 | 3880 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
3881 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
3882 | return 1; | |
3883 | ||
3884 | return 0; | |
3885 | } | |
3886 | ||
2ea28649 | 3887 | static enum gdb_signal |
a223f1e7 JB |
3888 | find_stop_signal (void) |
3889 | { | |
3890 | struct thread_info *info = | |
3891 | iterate_over_threads (find_signalled_thread, NULL); | |
3892 | ||
3893 | if (info) | |
16c381f0 | 3894 | return info->suspend.stop_signal; |
a223f1e7 | 3895 | else |
a493e3e2 | 3896 | return GDB_SIGNAL_0; |
a223f1e7 JB |
3897 | } |
3898 | ||
be4d1333 | 3899 | static char * |
fc6691b2 | 3900 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 MS |
3901 | { |
3902 | struct cleanup *old_chain; | |
3903 | gdb_gregset_t gregs; | |
3904 | gdb_fpregset_t fpregs; | |
3905 | char fname[16] = {'\0'}; | |
3906 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 3907 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3908 | char *note_data = NULL; |
6dbdc4a3 | 3909 | char *inf_args; |
be4d1333 | 3910 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 3911 | gdb_byte *auxv; |
4e73f23d | 3912 | int auxv_len; |
2ea28649 | 3913 | enum gdb_signal stop_signal; |
be4d1333 MS |
3914 | |
3915 | if (get_exec_file (0)) | |
3916 | { | |
9f37bbcc | 3917 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
3918 | fname[sizeof (fname) - 1] = 0; |
3919 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
3920 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
3921 | |
3922 | inf_args = get_inferior_args (); | |
3923 | if (inf_args && *inf_args && | |
3924 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 3925 | { |
19958708 | 3926 | strncat (psargs, " ", |
be4d1333 | 3927 | sizeof (psargs) - strlen (psargs)); |
19958708 | 3928 | strncat (psargs, inf_args, |
be4d1333 MS |
3929 | sizeof (psargs) - strlen (psargs)); |
3930 | } | |
3931 | } | |
3932 | ||
19958708 RM |
3933 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
3934 | note_data, | |
3935 | note_size, | |
3936 | fname, | |
be4d1333 MS |
3937 | psargs); |
3938 | ||
651c8d2d PA |
3939 | stop_signal = find_stop_signal (); |
3940 | ||
3e3420f6 PA |
3941 | fill_gregset (get_current_regcache (), &gregs, -1); |
3942 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 3943 | ptid_get_pid (inferior_ptid), |
3e3420f6 | 3944 | stop_signal, &gregs); |
3e3420f6 | 3945 | |
be4d1333 MS |
3946 | thread_args.obfd = obfd; |
3947 | thread_args.note_data = note_data; | |
3948 | thread_args.note_size = note_size; | |
651c8d2d | 3949 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
3950 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
3951 | &thread_args); | |
2689673f | 3952 | note_data = thread_args.note_data; |
be4d1333 | 3953 | |
13547ab6 DJ |
3954 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
3955 | NULL, &auxv); | |
4e73f23d RM |
3956 | if (auxv_len > 0) |
3957 | { | |
3958 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
3959 | "CORE", NT_AUXV, auxv, auxv_len); | |
3960 | xfree (auxv); | |
3961 | } | |
3962 | ||
be4d1333 MS |
3963 | return note_data; |
3964 | } | |
be4d1333 | 3965 | /* =================== END GCORE .NOTE "MODULE" =================== */ |