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44122162 | 1 | /* Machine independent support for Solaris /proc (process file system) for GDB. |
2555fe1a | 2 | |
e2882c85 | 3 | Copyright (C) 1999-2018 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
45741a9c | 25 | #include "infrun.h" |
c3f6f71d JM |
26 | #include "target.h" |
27 | #include "gdbcore.h" | |
65554fef | 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 29 | #include "gdbcmd.h" |
0fda6bd2 | 30 | #include "gdbthread.h" |
7f7fe91e | 31 | #include "regcache.h" |
28439f5e | 32 | #include "inf-child.h" |
4fa7574e | 33 | #include "nat/fork-inferior.h" |
88fc5eb7 | 34 | #include "filestuff.h" |
c906108c | 35 | |
0df8b418 | 36 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c906108c | 37 | |
c3f6f71d JM |
38 | #include <sys/procfs.h> |
39 | #include <sys/fault.h> | |
40 | #include <sys/syscall.h> | |
2555fe1a | 41 | #include "gdb_wait.h" |
0fda6bd2 JM |
42 | #include <signal.h> |
43 | #include <ctype.h> | |
92107356 | 44 | #include "gdb_bfd.h" |
44270758 | 45 | #include "inflow.h" |
4e73f23d | 46 | #include "auxv.h" |
d1a7880c | 47 | #include "procfs.h" |
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); |
a14ed312 | 92 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
93 | static void procfs_fetch_registers (struct target_ops *, |
94 | struct regcache *, int); | |
95 | static void procfs_store_registers (struct target_ops *, | |
96 | struct regcache *, int); | |
94bedb42 TT |
97 | static void procfs_pass_signals (struct target_ops *self, |
98 | int, unsigned char *); | |
7d85a9c0 | 99 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 100 | static void procfs_mourn_inferior (struct target_ops *ops); |
5f2ad7a3 RO |
101 | static void procfs_create_inferior (struct target_ops *, const char *, |
102 | const std::string &, char **, int); | |
117de6a9 | 103 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 104 | ptid_t, struct target_waitstatus *, int); |
e96027e0 PA |
105 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
106 | const gdb_byte *, | |
107 | ULONGEST, ULONGEST, | |
108 | ULONGEST *); | |
4ac248ca | 109 | static target_xfer_partial_ftype procfs_xfer_partial; |
a14ed312 | 110 | |
28439f5e | 111 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 112 | |
e8032dde | 113 | static void procfs_update_thread_list (struct target_ops *ops); |
7a114964 | 114 | static const char *procfs_pid_to_str (struct target_ops *, ptid_t); |
c3f6f71d | 115 | |
2e73927c TT |
116 | static int proc_find_memory_regions (struct target_ops *self, |
117 | find_memory_region_ftype, void *); | |
be4d1333 | 118 | |
44122162 RO |
119 | static char *procfs_make_note_section (struct target_ops *self, |
120 | bfd *, int *); | |
be4d1333 | 121 | |
5461485a | 122 | static int procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f | 123 | enum bptype, int, int); |
1e03ad20 | 124 | |
7bc112c1 | 125 | static void procfs_info_proc (struct target_ops *, const char *, |
145b16a9 UW |
126 | enum info_proc_what); |
127 | ||
c47ffbe3 | 128 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
129 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
130 | is presented in 64-bit format. We need to provide a custom parser | |
131 | to handle that. */ | |
c47ffbe3 VP |
132 | static int |
133 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
77382aee | 134 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
c47ffbe3 | 135 | { |
f5656ead | 136 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
137 | gdb_byte *ptr = *readptr; |
138 | ||
139 | if (endptr == ptr) | |
140 | return 0; | |
77382aee | 141 | |
c47ffbe3 VP |
142 | if (endptr - ptr < 8 * 2) |
143 | return -1; | |
144 | ||
e17a4113 | 145 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
146 | ptr += 8; |
147 | /* The size of data is always 64-bit. If the application is 32-bit, | |
148 | it will be zero extended, as expected. */ | |
e17a4113 | 149 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
150 | ptr += 8; |
151 | ||
152 | *readptr = ptr; | |
153 | return 1; | |
154 | } | |
155 | #endif | |
156 | ||
d1a7880c | 157 | struct target_ops * |
28439f5e | 158 | procfs_target (void) |
c3f6f71d | 159 | { |
28439f5e PA |
160 | struct target_ops *t = inf_child_target (); |
161 | ||
77382aee PA |
162 | t->to_create_inferior = procfs_create_inferior; |
163 | t->to_kill = procfs_kill_inferior; | |
164 | t->to_mourn_inferior = procfs_mourn_inferior; | |
165 | t->to_attach = procfs_attach; | |
166 | t->to_detach = procfs_detach; | |
167 | t->to_wait = procfs_wait; | |
168 | t->to_resume = procfs_resume; | |
169 | t->to_fetch_registers = procfs_fetch_registers; | |
170 | t->to_store_registers = procfs_store_registers; | |
171 | t->to_xfer_partial = procfs_xfer_partial; | |
2455069d | 172 | t->to_pass_signals = procfs_pass_signals; |
77382aee | 173 | t->to_files_info = procfs_files_info; |
28439f5e | 174 | |
e8032dde | 175 | t->to_update_thread_list = procfs_update_thread_list; |
77382aee PA |
176 | t->to_thread_alive = procfs_thread_alive; |
177 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 178 | |
77382aee | 179 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
180 | t->to_find_memory_regions = proc_find_memory_regions; |
181 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 182 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
183 | |
184 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 185 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
186 | #endif |
187 | ||
77382aee | 188 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
189 | |
190 | return t; | |
c3f6f71d | 191 | } |
c906108c | 192 | |
c3f6f71d JM |
193 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
194 | ||
77382aee PA |
195 | /* World Unification: |
196 | ||
197 | Put any typedefs, defines etc. here that are required for the | |
198 | unification of code that handles different versions of /proc. */ | |
c3f6f71d | 199 | |
44122162 RO |
200 | enum { READ_WATCHFLAG = WA_READ, |
201 | WRITE_WATCHFLAG = WA_WRITE, | |
202 | EXEC_WATCHFLAG = WA_EXEC, | |
203 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
204 | }; | |
c3f6f71d JM |
205 | |
206 | ||
207 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
208 | ||
209 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
210 | ||
211 | /* The procinfo struct is a wrapper to hold all the state information | |
212 | concerning a /proc process. There should be exactly one procinfo | |
213 | for each process, and since GDB currently can debug only one | |
214 | process at a time, that means there should be only one procinfo. | |
215 | All of the LWP's of a process can be accessed indirectly thru the | |
216 | single process procinfo. | |
217 | ||
218 | However, against the day when GDB may debug more than one process, | |
219 | this data structure is kept in a list (which for now will hold no | |
220 | more than one member), and many functions will have a pointer to a | |
221 | procinfo as an argument. | |
222 | ||
223 | There will be a separate procinfo structure for use by the (not yet | |
224 | implemented) "info proc" command, so that we can print useful | |
225 | information about any random process without interfering with the | |
0df8b418 | 226 | inferior's procinfo information. */ |
c3f6f71d | 227 | |
c3f6f71d | 228 | /* format strings for /proc paths */ |
44122162 RO |
229 | #define MAIN_PROC_NAME_FMT "/proc/%d" |
230 | #define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
231 | #define AS_PROC_NAME_FMT "/proc/%d/as" | |
232 | #define MAP_PROC_NAME_FMT "/proc/%d/map" | |
233 | #define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
234 | #define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
c906108c | 235 | |
c3f6f71d JM |
236 | typedef struct procinfo { |
237 | struct procinfo *next; | |
238 | int pid; /* Process ID */ | |
239 | int tid; /* Thread/LWP id */ | |
c906108c | 240 | |
c3f6f71d JM |
241 | /* process state */ |
242 | int was_stopped; | |
243 | int ignore_next_sigstop; | |
c906108c | 244 | |
c3f6f71d | 245 | int ctl_fd; /* File descriptor for /proc control file */ |
c3f6f71d JM |
246 | int status_fd; /* File descriptor for /proc status file */ |
247 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 248 | |
c3f6f71d | 249 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 250 | |
c3f6f71d | 251 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
44122162 RO |
252 | sigset_t saved_sigset; /* Saved traced signal set */ |
253 | sigset_t saved_sighold; /* Saved held signal set */ | |
37de36c6 KB |
254 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
255 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 256 | |
44122162 | 257 | pstatus_t prstatus; /* Current process status info */ |
19958708 | 258 | |
c3f6f71d | 259 | struct procinfo *thread_list; |
c906108c | 260 | |
c3f6f71d JM |
261 | int status_valid : 1; |
262 | int gregs_valid : 1; | |
263 | int fpregs_valid : 1; | |
264 | int threads_valid: 1; | |
265 | } procinfo; | |
c906108c | 266 | |
c3f6f71d | 267 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 268 | |
c3f6f71d | 269 | /* Function prototypes for procinfo module: */ |
c906108c | 270 | |
a14ed312 KB |
271 | static procinfo *find_procinfo_or_die (int pid, int tid); |
272 | static procinfo *find_procinfo (int pid, int tid); | |
273 | static procinfo *create_procinfo (int pid, int tid); | |
44122162 | 274 | static void destroy_procinfo (procinfo *p); |
004527cb | 275 | static void do_destroy_procinfo_cleanup (void *); |
44122162 RO |
276 | static void dead_procinfo (procinfo *p, const char *msg, int killp); |
277 | static int open_procinfo_files (procinfo *p, int which); | |
278 | static void close_procinfo_files (procinfo *p); | |
279 | static sysset_t *sysset_t_alloc (procinfo *pi); | |
c906108c | 280 | |
e9ef4f39 | 281 | static int iterate_over_mappings |
b8edc417 JK |
282 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
283 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 284 | void *data)); |
e9ef4f39 | 285 | |
c3f6f71d | 286 | /* The head of the procinfo list: */ |
44122162 | 287 | static procinfo *procinfo_list; |
c906108c | 288 | |
77382aee PA |
289 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
290 | not found. */ | |
c906108c | 291 | |
19958708 | 292 | static procinfo * |
fba45db2 | 293 | find_procinfo (int pid, int tid) |
c5aa993b | 294 | { |
c3f6f71d | 295 | procinfo *pi; |
c906108c | 296 | |
c3f6f71d JM |
297 | for (pi = procinfo_list; pi; pi = pi->next) |
298 | if (pi->pid == pid) | |
299 | break; | |
c906108c | 300 | |
c3f6f71d JM |
301 | if (pi) |
302 | if (tid) | |
303 | { | |
304 | /* Don't check threads_valid. If we're updating the | |
305 | thread_list, we want to find whatever threads are already | |
306 | here. This means that in general it is the caller's | |
307 | responsibility to check threads_valid and update before | |
308 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 309 | thread. */ |
c3f6f71d JM |
310 | |
311 | for (pi = pi->thread_list; pi; pi = pi->next) | |
312 | if (pi->tid == tid) | |
313 | break; | |
314 | } | |
c906108c | 315 | |
c3f6f71d JM |
316 | return pi; |
317 | } | |
c906108c | 318 | |
77382aee | 319 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 320 | |
c3f6f71d | 321 | static procinfo * |
fba45db2 | 322 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
323 | { |
324 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 325 | |
c3f6f71d | 326 | if (pi == NULL) |
0fda6bd2 JM |
327 | { |
328 | if (tid) | |
3e43a32a MS |
329 | error (_("procfs: couldn't find pid %d " |
330 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
331 | pid, tid); |
332 | else | |
8a3fe4f8 | 333 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 334 | } |
c3f6f71d JM |
335 | return pi; |
336 | } | |
c906108c | 337 | |
77382aee PA |
338 | /* Wrapper for `open'. The appropriate open call is attempted; if |
339 | unsuccessful, it will be retried as many times as needed for the | |
340 | EAGAIN and EINTR conditions. | |
19958708 | 341 | |
77382aee PA |
342 | For other conditions, retry the open a limited number of times. In |
343 | addition, a short sleep is imposed prior to retrying the open. The | |
344 | reason for this sleep is to give the kernel a chance to catch up | |
345 | and create the file in question in the event that GDB "wins" the | |
346 | race to open a file before the kernel has created it. */ | |
19958708 | 347 | |
4d1bcd09 KB |
348 | static int |
349 | open_with_retry (const char *pathname, int flags) | |
350 | { | |
351 | int retries_remaining, status; | |
352 | ||
353 | retries_remaining = 2; | |
354 | ||
355 | while (1) | |
356 | { | |
357 | status = open (pathname, flags); | |
358 | ||
359 | if (status >= 0 || retries_remaining == 0) | |
360 | break; | |
361 | else if (errno != EINTR && errno != EAGAIN) | |
362 | { | |
363 | retries_remaining--; | |
364 | sleep (1); | |
365 | } | |
366 | } | |
367 | ||
368 | return status; | |
369 | } | |
370 | ||
44122162 RO |
371 | /* Open the file descriptor for the process or LWP. We only open the |
372 | control file descriptor; the others are opened lazily as needed. | |
77382aee | 373 | Returns the file descriptor, or zero for failure. */ |
c906108c | 374 | |
c3f6f71d | 375 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 376 | |
c3f6f71d | 377 | static int |
fba45db2 | 378 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d JM |
379 | { |
380 | char tmp[MAX_PROC_NAME_SIZE]; | |
381 | int fd; | |
382 | ||
77382aee PA |
383 | /* This function is getting ALMOST long enough to break up into |
384 | several. Here is some rationale: | |
385 | ||
77382aee PA |
386 | There are several file descriptors that may need to be open |
387 | for any given process or LWP. The ones we're intereted in are: | |
388 | - control (ctl) write-only change the state | |
389 | - status (status) read-only query the state | |
390 | - address space (as) read/write access memory | |
391 | - map (map) read-only virtual addr map | |
392 | Most of these are opened lazily as they are needed. | |
393 | The pathnames for the 'files' for an LWP look slightly | |
394 | different from those of a first-class process: | |
395 | Pathnames for a process (<proc-id>): | |
396 | /proc/<proc-id>/ctl | |
397 | /proc/<proc-id>/status | |
398 | /proc/<proc-id>/as | |
399 | /proc/<proc-id>/map | |
400 | Pathnames for an LWP (lwp-id): | |
401 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
402 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
403 | An LWP has no map or address space file descriptor, since | |
44122162 RO |
404 | the memory map and address space are shared by all LWPs. */ |
405 | ||
77382aee PA |
406 | /* In this case, there are several different file descriptors that |
407 | we might be asked to open. The control file descriptor will be | |
408 | opened early, but the others will be opened lazily as they are | |
409 | needed. */ | |
c3f6f71d JM |
410 | |
411 | strcpy (tmp, pi->pathname); | |
0df8b418 | 412 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
413 | case FD_CTL: |
414 | if (pi->tid) | |
415 | strcat (tmp, "/lwpctl"); | |
416 | else | |
417 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 418 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 419 | if (fd < 0) |
c3f6f71d JM |
420 | return 0; /* fail */ |
421 | pi->ctl_fd = fd; | |
422 | break; | |
423 | case FD_AS: | |
424 | if (pi->tid) | |
0df8b418 | 425 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 426 | strcat (tmp, "/as"); |
4d1bcd09 | 427 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 428 | if (fd < 0) |
c3f6f71d JM |
429 | return 0; /* fail */ |
430 | pi->as_fd = fd; | |
431 | break; | |
432 | case FD_STATUS: | |
433 | if (pi->tid) | |
434 | strcat (tmp, "/lwpstatus"); | |
435 | else | |
436 | strcat (tmp, "/status"); | |
4d1bcd09 | 437 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 438 | if (fd < 0) |
c3f6f71d JM |
439 | return 0; /* fail */ |
440 | pi->status_fd = fd; | |
441 | break; | |
442 | default: | |
443 | return 0; /* unknown file descriptor */ | |
444 | } | |
c906108c | 445 | |
c3f6f71d JM |
446 | return 1; /* success */ |
447 | } | |
c906108c | 448 | |
77382aee PA |
449 | /* Allocate a data structure and link it into the procinfo list. |
450 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
451 | pointer to new procinfo struct. */ | |
c906108c | 452 | |
c3f6f71d | 453 | static procinfo * |
fba45db2 | 454 | create_procinfo (int pid, int tid) |
c3f6f71d | 455 | { |
0b62613e | 456 | procinfo *pi, *parent = NULL; |
c906108c | 457 | |
0d06e24b | 458 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 459 | return pi; /* Already exists, nothing to do. */ |
c906108c | 460 | |
0df8b418 | 461 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
462 | if (tid != 0) |
463 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
464 | create it if it | |
0df8b418 | 465 | doesn't exist yet? */ |
c906108c | 466 | |
8d749320 | 467 | pi = XNEW (procinfo); |
c3f6f71d JM |
468 | memset (pi, 0, sizeof (procinfo)); |
469 | pi->pid = pid; | |
470 | pi->tid = tid; | |
c906108c | 471 | |
1d5e0602 KB |
472 | pi->saved_entryset = sysset_t_alloc (pi); |
473 | pi->saved_exitset = sysset_t_alloc (pi); | |
474 | ||
c3f6f71d JM |
475 | /* Chain into list. */ |
476 | if (tid == 0) | |
477 | { | |
478 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
479 | pi->next = procinfo_list; | |
480 | procinfo_list = pi; | |
481 | } | |
482 | else | |
483 | { | |
c3f6f71d | 484 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); |
c3f6f71d JM |
485 | pi->next = parent->thread_list; |
486 | parent->thread_list = pi; | |
487 | } | |
488 | return pi; | |
489 | } | |
c906108c | 490 | |
77382aee | 491 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 492 | |
c3f6f71d | 493 | static void |
fba45db2 | 494 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
495 | { |
496 | if (pi->ctl_fd > 0) | |
497 | close (pi->ctl_fd); | |
c3f6f71d JM |
498 | if (pi->as_fd > 0) |
499 | close (pi->as_fd); | |
500 | if (pi->status_fd > 0) | |
501 | close (pi->status_fd); | |
c3f6f71d JM |
502 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
503 | } | |
c906108c | 504 | |
77382aee | 505 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 506 | |
c3f6f71d | 507 | static void |
fba45db2 | 508 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
509 | { |
510 | procinfo *ptr; | |
511 | ||
77382aee | 512 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
513 | if (pi == *list) |
514 | *list = pi->next; | |
19958708 | 515 | else |
c3f6f71d JM |
516 | for (ptr = *list; ptr; ptr = ptr->next) |
517 | if (ptr->next == pi) | |
518 | { | |
519 | ptr->next = pi->next; | |
520 | break; | |
521 | } | |
7a292a7a | 522 | |
77382aee | 523 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 524 | close_procinfo_files (pi); |
7a292a7a | 525 | |
77382aee | 526 | /* Step three: free the memory. */ |
1d5e0602 KB |
527 | xfree (pi->saved_entryset); |
528 | xfree (pi->saved_exitset); | |
b8c9b27d | 529 | xfree (pi); |
c3f6f71d | 530 | } |
c906108c | 531 | |
c3f6f71d | 532 | static void |
fba45db2 | 533 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
534 | { |
535 | procinfo *tmp; | |
c906108c | 536 | |
0df8b418 | 537 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 538 | { |
0df8b418 | 539 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
540 | destroy_one_procinfo (&tmp->thread_list, pi); |
541 | } | |
0df8b418 | 542 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
543 | { |
544 | /* First destroy the children, if any; */ | |
545 | while (pi->thread_list != NULL) | |
546 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
547 | /* Then destroy the parent. Genocide!!! */ | |
548 | destroy_one_procinfo (&procinfo_list, pi); | |
549 | } | |
550 | } | |
c906108c | 551 | |
004527cb AC |
552 | static void |
553 | do_destroy_procinfo_cleanup (void *pi) | |
554 | { | |
b196bc4c | 555 | destroy_procinfo ((procinfo *) pi); |
004527cb AC |
556 | } |
557 | ||
c3f6f71d | 558 | enum { NOKILL, KILL }; |
c906108c | 559 | |
77382aee PA |
560 | /* To be called on a non_recoverable error for a procinfo. Prints |
561 | error messages, optionally sends a SIGKILL to the process, then | |
562 | destroys the data structure. */ | |
c906108c | 563 | |
c3f6f71d | 564 | static void |
995816ba | 565 | dead_procinfo (procinfo *pi, const char *msg, int kill_p) |
c3f6f71d JM |
566 | { |
567 | char procfile[80]; | |
c906108c | 568 | |
c3f6f71d JM |
569 | if (pi->pathname) |
570 | { | |
571 | print_sys_errmsg (pi->pathname, errno); | |
572 | } | |
573 | else | |
574 | { | |
575 | sprintf (procfile, "process %d", pi->pid); | |
576 | print_sys_errmsg (procfile, errno); | |
577 | } | |
578 | if (kill_p == KILL) | |
579 | kill (pi->pid, SIGKILL); | |
c906108c | 580 | |
c3f6f71d | 581 | destroy_procinfo (pi); |
0b62613e | 582 | error ("%s", msg); |
c3f6f71d | 583 | } |
c906108c | 584 | |
77382aee | 585 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
586 | |
587 | static sysset_t * | |
44122162 | 588 | sysset_t_alloc (procinfo *pi) |
37de36c6 | 589 | { |
44122162 | 590 | return (sysset_t *) xmalloc (sizeof (sysset_t)); |
37de36c6 KB |
591 | } |
592 | ||
c3f6f71d | 593 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 594 | |
c3f6f71d | 595 | /* =================== /proc "MODULE" =================== */ |
c906108c | 596 | |
77382aee PA |
597 | /* This "module" is the interface layer between the /proc system API |
598 | and the gdb target vector functions. This layer consists of access | |
599 | functions that encapsulate each of the basic operations that we | |
600 | need to use from the /proc API. | |
601 | ||
602 | The main motivation for this layer is to hide the fact that there | |
603 | are two very different implementations of the /proc API. Rather | |
604 | than have a bunch of #ifdefs all thru the gdb target vector | |
605 | functions, we do our best to hide them all in here. */ | |
c906108c | 606 | |
44122162 RO |
607 | static long proc_flags (procinfo *pi); |
608 | static int proc_why (procinfo *pi); | |
609 | static int proc_what (procinfo *pi); | |
610 | static int proc_set_current_signal (procinfo *pi, int signo); | |
611 | static int proc_get_current_thread (procinfo *pi); | |
d3581e61 | 612 | static int proc_iterate_over_threads |
44122162 | 613 | (procinfo *pi, |
d3581e61 JB |
614 | int (*func) (procinfo *, procinfo *, void *), |
615 | void *ptr); | |
616 | ||
617 | static void | |
995816ba | 618 | proc_warn (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
619 | { |
620 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
621 | print_sys_errmsg (errmsg, errno); | |
622 | } | |
c906108c | 623 | |
d3581e61 | 624 | static void |
995816ba | 625 | proc_error (procinfo *pi, const char *func, int line) |
c3f6f71d JM |
626 | { |
627 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
628 | perror_with_name (errmsg); | |
629 | } | |
c906108c | 630 | |
77382aee PA |
631 | /* Updates the status struct in the procinfo. There is a 'valid' |
632 | flag, to let other functions know when this function needs to be | |
633 | called (so the status is only read when it is needed). The status | |
634 | file descriptor is also only opened when it is needed. Returns | |
635 | non-zero for success, zero for failure. */ | |
c906108c | 636 | |
d3581e61 | 637 | static int |
fba45db2 | 638 | proc_get_status (procinfo *pi) |
c3f6f71d | 639 | { |
0df8b418 | 640 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
641 | if (pi->status_fd == 0 && |
642 | open_procinfo_files (pi, FD_STATUS) == 0) | |
643 | { | |
644 | pi->status_valid = 0; | |
645 | return 0; | |
646 | } | |
c906108c | 647 | |
c3f6f71d JM |
648 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
649 | pi->status_valid = 0; /* fail */ | |
650 | else | |
651 | { | |
19958708 | 652 | /* Sigh... I have to read a different data structure, |
0df8b418 | 653 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 654 | if (pi->tid) |
19958708 RM |
655 | pi->status_valid = (read (pi->status_fd, |
656 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
657 | sizeof (lwpstatus_t)) |
658 | == sizeof (lwpstatus_t)); | |
659 | else | |
660 | { | |
19958708 | 661 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d | 662 | (char *) &pi->prstatus, |
44122162 RO |
663 | sizeof (pstatus_t)) |
664 | == sizeof (pstatus_t)); | |
c3f6f71d JM |
665 | } |
666 | } | |
c906108c | 667 | |
c3f6f71d JM |
668 | if (pi->status_valid) |
669 | { | |
19958708 | 670 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 671 | proc_why (pi), |
19958708 | 672 | proc_what (pi), |
c3f6f71d JM |
673 | proc_get_current_thread (pi)); |
674 | } | |
c906108c | 675 | |
77382aee | 676 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d | 677 | pi->gregs_valid = pi->status_valid; |
77382aee PA |
678 | /* In the read/write multiple-fd model, the status struct includes |
679 | the fp regs too, so mark them valid too. */ | |
c3f6f71d | 680 | pi->fpregs_valid = pi->status_valid; |
77382aee | 681 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 682 | } |
c906108c | 683 | |
77382aee | 684 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 685 | |
d3581e61 | 686 | static long |
fba45db2 | 687 | proc_flags (procinfo *pi) |
c3f6f71d JM |
688 | { |
689 | if (!pi->status_valid) | |
690 | if (!proc_get_status (pi)) | |
0df8b418 | 691 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 692 | |
c3f6f71d | 693 | return pi->prstatus.pr_lwp.pr_flags; |
c3f6f71d | 694 | } |
c906108c | 695 | |
77382aee | 696 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 697 | |
d3581e61 | 698 | static int |
fba45db2 | 699 | proc_why (procinfo *pi) |
c3f6f71d JM |
700 | { |
701 | if (!pi->status_valid) | |
702 | if (!proc_get_status (pi)) | |
0df8b418 | 703 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 704 | |
c3f6f71d | 705 | return pi->prstatus.pr_lwp.pr_why; |
c3f6f71d | 706 | } |
c906108c | 707 | |
77382aee | 708 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 709 | |
d3581e61 | 710 | static int |
fba45db2 | 711 | proc_what (procinfo *pi) |
c3f6f71d JM |
712 | { |
713 | if (!pi->status_valid) | |
714 | if (!proc_get_status (pi)) | |
0df8b418 | 715 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 716 | |
c3f6f71d | 717 | return pi->prstatus.pr_lwp.pr_what; |
c3f6f71d | 718 | } |
c906108c | 719 | |
77382aee PA |
720 | /* This function is only called when PI is stopped by a watchpoint. |
721 | Assuming the OS supports it, write to *ADDR the data address which | |
722 | triggered it and return 1. Return 0 if it is not possible to know | |
723 | the address. */ | |
bf701c2c PM |
724 | |
725 | static int | |
726 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
727 | { | |
728 | if (!pi->status_valid) | |
729 | if (!proc_get_status (pi)) | |
730 | return 0; | |
731 | ||
f5656ead TT |
732 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
733 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c | 734 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
bf701c2c PM |
735 | return 1; |
736 | } | |
737 | ||
77382aee PA |
738 | /* Returns the pr_nsysarg field (number of args to the current |
739 | syscall). */ | |
c3f6f71d | 740 | |
d3581e61 | 741 | static int |
fba45db2 | 742 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
743 | { |
744 | if (!pi->status_valid) | |
745 | if (!proc_get_status (pi)) | |
746 | return 0; | |
19958708 | 747 | |
c3f6f71d | 748 | return pi->prstatus.pr_lwp.pr_nsysarg; |
c3f6f71d | 749 | } |
c906108c | 750 | |
77382aee PA |
751 | /* Returns the pr_sysarg field (pointer to the arguments of current |
752 | syscall). */ | |
c906108c | 753 | |
d3581e61 | 754 | static long * |
fba45db2 | 755 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
756 | { |
757 | if (!pi->status_valid) | |
758 | if (!proc_get_status (pi)) | |
759 | return NULL; | |
19958708 | 760 | |
c3f6f71d | 761 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
c3f6f71d | 762 | } |
77382aee | 763 | |
44122162 | 764 | /* Set or reset any of the following process flags: |
77382aee PA |
765 | PR_FORK -- forked child will inherit trace flags |
766 | PR_RLC -- traced process runs when last /proc file closed. | |
767 | PR_KLC -- traced process is killed when last /proc file closed. | |
768 | PR_ASYNC -- LWP's get to run/stop independently. | |
769 | ||
44122162 | 770 | This function is done using read/write [PCSET/PCRESET/PCUNSET]. |
77382aee PA |
771 | |
772 | Arguments: | |
773 | pi -- the procinfo | |
774 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
775 | mode -- 1 for set, 0 for reset. | |
776 | ||
777 | Returns non-zero for success, zero for failure. */ | |
c906108c | 778 | |
c3f6f71d | 779 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 780 | |
c3f6f71d | 781 | static int |
fba45db2 | 782 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
783 | { |
784 | long win = 0; /* default to fail */ | |
785 | ||
77382aee PA |
786 | /* These operations affect the process as a whole, and applying them |
787 | to an individual LWP has the same meaning as applying them to the | |
788 | main process. Therefore, if we're ever called with a pointer to | |
789 | an LWP's procinfo, let's substitute the process's procinfo and | |
790 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
791 | |
792 | if (pi->pid != 0) | |
793 | pi = find_procinfo_or_die (pi->pid, 0); | |
794 | ||
44122162 | 795 | procfs_ctl_t arg[2]; |
c5aa993b | 796 | |
44122162 RO |
797 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
798 | arg[0] = PCSET; | |
0df8b418 | 799 | else /* Reset the flag. */ |
44122162 RO |
800 | arg[0] = PCUNSET; |
801 | ||
802 | arg[1] = flag; | |
803 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 804 | |
77382aee PA |
805 | /* The above operation renders the procinfo's cached pstatus |
806 | obsolete. */ | |
c3f6f71d | 807 | pi->status_valid = 0; |
c906108c | 808 | |
c3f6f71d | 809 | if (!win) |
8a3fe4f8 | 810 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
811 | flag == PR_FORK ? "PR_FORK" : |
812 | flag == PR_RLC ? "PR_RLC" : | |
c3f6f71d | 813 | flag == PR_ASYNC ? "PR_ASYNC" : |
0d06e24b | 814 | flag == PR_KLC ? "PR_KLC" : |
c3f6f71d JM |
815 | "<unknown flag>", |
816 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 817 | |
c3f6f71d JM |
818 | return win; |
819 | } | |
c906108c | 820 | |
77382aee PA |
821 | /* Set the run_on_last_close flag. Process with all threads will |
822 | become runnable when debugger closes all /proc fds. Returns | |
823 | non-zero for success, zero for failure. */ | |
c906108c | 824 | |
d3581e61 | 825 | static int |
fba45db2 | 826 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 827 | { |
c3f6f71d JM |
828 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
829 | } | |
c906108c | 830 | |
77382aee PA |
831 | /* Reset the run_on_last_close flag. The process will NOT become |
832 | runnable when debugger closes its file handles. Returns non-zero | |
833 | for success, zero for failure. */ | |
c906108c | 834 | |
d3581e61 | 835 | static int |
fba45db2 | 836 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
837 | { |
838 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
839 | } |
840 | ||
77382aee PA |
841 | /* Reset inherit_on_fork flag. If the process forks a child while we |
842 | are registered for events in the parent, then we will NOT recieve | |
843 | events from the child. Returns non-zero for success, zero for | |
844 | failure. */ | |
c906108c | 845 | |
d3581e61 | 846 | static int |
fba45db2 | 847 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
848 | { |
849 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
850 | } | |
c906108c | 851 | |
77382aee PA |
852 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
853 | (signal etc.), the remaining LWPs will continue to run. Returns | |
854 | non-zero for success, zero for failure. */ | |
c906108c | 855 | |
d3581e61 | 856 | static int |
fba45db2 | 857 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
858 | { |
859 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
860 | } | |
c906108c | 861 | |
77382aee PA |
862 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
863 | (signal etc.), then all other LWPs will stop as well. Returns | |
864 | non-zero for success, zero for failure. */ | |
c906108c | 865 | |
d3581e61 | 866 | static int |
fba45db2 | 867 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
868 | { |
869 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
870 | } | |
c906108c | 871 | |
77382aee PA |
872 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
873 | for success, zero for failure. */ | |
c906108c | 874 | |
d3581e61 | 875 | static int |
fba45db2 | 876 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
877 | { |
878 | int win; | |
c906108c | 879 | |
77382aee PA |
880 | /* We might conceivably apply this operation to an LWP, and the |
881 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 882 | |
c3f6f71d JM |
883 | if (pi->ctl_fd == 0 && |
884 | open_procinfo_files (pi, FD_CTL) == 0) | |
885 | return 0; | |
886 | else | |
887 | { | |
37de36c6 | 888 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 889 | |
c3f6f71d | 890 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d | 891 | } |
c906108c | 892 | |
c3f6f71d JM |
893 | return win; |
894 | } | |
c5aa993b | 895 | |
77382aee PA |
896 | /* Wait for the process or LWP to stop (block until it does). Returns |
897 | non-zero for success, zero for failure. */ | |
c906108c | 898 | |
d3581e61 | 899 | static int |
fba45db2 | 900 | proc_wait_for_stop (procinfo *pi) |
c906108c | 901 | { |
c3f6f71d JM |
902 | int win; |
903 | ||
77382aee PA |
904 | /* We should never have to apply this operation to any procinfo |
905 | except the one for the main process. If that ever changes for | |
906 | any reason, then take out the following clause and replace it | |
907 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 908 | |
c3f6f71d JM |
909 | if (pi->tid != 0) |
910 | pi = find_procinfo_or_die (pi->pid, 0); | |
911 | ||
44122162 | 912 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 913 | |
44122162 RO |
914 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
915 | /* We been runnin' and we stopped -- need to update status. */ | |
916 | pi->status_valid = 0; | |
c906108c | 917 | |
c3f6f71d | 918 | return win; |
c906108c SS |
919 | } |
920 | ||
77382aee PA |
921 | /* Make the process or LWP runnable. |
922 | ||
923 | Options (not all are implemented): | |
924 | - single-step | |
925 | - clear current fault | |
926 | - clear current signal | |
927 | - abort the current system call | |
928 | - stop as soon as finished with system call | |
929 | - (ioctl): set traced signal set | |
930 | - (ioctl): set held signal set | |
931 | - (ioctl): set traced fault set | |
932 | - (ioctl): set start pc (vaddr) | |
933 | ||
934 | Always clears the current fault. PI is the process or LWP to | |
935 | operate on. If STEP is true, set the process or LWP to trap after | |
936 | one instruction. If SIGNO is zero, clear the current signal if | |
937 | any; if non-zero, set the current signal to this one. Returns | |
938 | non-zero for success, zero for failure. */ | |
c3f6f71d | 939 | |
d3581e61 | 940 | static int |
fba45db2 | 941 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
942 | { |
943 | int win; | |
944 | int runflags; | |
945 | ||
77382aee PA |
946 | /* We will probably have to apply this operation to individual |
947 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 948 | |
c3f6f71d JM |
949 | if (pi->ctl_fd == 0 && |
950 | open_procinfo_files (pi, FD_CTL) == 0) | |
951 | { | |
952 | return 0; | |
953 | } | |
c906108c | 954 | |
0df8b418 | 955 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
956 | if (step) |
957 | runflags |= PRSTEP; | |
958 | if (signo == 0) | |
959 | runflags |= PRCSIG; | |
0df8b418 | 960 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 961 | proc_set_current_signal (pi, signo); |
c5aa993b | 962 | |
44122162 | 963 | procfs_ctl_t cmd[2]; |
c906108c | 964 | |
44122162 RO |
965 | cmd[0] = PCRUN; |
966 | cmd[1] = runflags; | |
967 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c906108c | 968 | |
c3f6f71d JM |
969 | return win; |
970 | } | |
c906108c | 971 | |
77382aee PA |
972 | /* Register to trace signals in the process or LWP. Returns non-zero |
973 | for success, zero for failure. */ | |
c906108c | 974 | |
d3581e61 | 975 | static int |
44122162 | 976 | proc_set_traced_signals (procinfo *pi, sigset_t *sigset) |
c906108c | 977 | { |
c3f6f71d JM |
978 | int win; |
979 | ||
77382aee PA |
980 | /* We should never have to apply this operation to any procinfo |
981 | except the one for the main process. If that ever changes for | |
982 | any reason, then take out the following clause and replace it | |
983 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 984 | |
c3f6f71d JM |
985 | if (pi->tid != 0) |
986 | pi = find_procinfo_or_die (pi->pid, 0); | |
987 | ||
44122162 RO |
988 | struct { |
989 | procfs_ctl_t cmd; | |
990 | /* Use char array to avoid alignment issues. */ | |
991 | char sigset[sizeof (sigset_t)]; | |
992 | } arg; | |
c906108c | 993 | |
44122162 RO |
994 | arg.cmd = PCSTRACE; |
995 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
996 | ||
997 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 998 | |
0df8b418 | 999 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1000 | pi->status_valid = 0; |
c906108c | 1001 | |
c3f6f71d | 1002 | if (!win) |
8a3fe4f8 | 1003 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1004 | return win; |
c906108c SS |
1005 | } |
1006 | ||
77382aee PA |
1007 | /* Register to trace hardware faults in the process or LWP. Returns |
1008 | non-zero for success, zero for failure. */ | |
c906108c | 1009 | |
d3581e61 | 1010 | static int |
fba45db2 | 1011 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1012 | { |
1013 | int win; | |
1014 | ||
77382aee PA |
1015 | /* We should never have to apply this operation to any procinfo |
1016 | except the one for the main process. If that ever changes for | |
1017 | any reason, then take out the following clause and replace it | |
1018 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1019 | |
c3f6f71d JM |
1020 | if (pi->tid != 0) |
1021 | pi = find_procinfo_or_die (pi->pid, 0); | |
1022 | ||
44122162 RO |
1023 | struct { |
1024 | procfs_ctl_t cmd; | |
1025 | /* Use char array to avoid alignment issues. */ | |
1026 | char fltset[sizeof (fltset_t)]; | |
1027 | } arg; | |
1028 | ||
1029 | arg.cmd = PCSFAULT; | |
1030 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1031 | |
44122162 | 1032 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
c906108c | 1033 | |
0df8b418 | 1034 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1035 | pi->status_valid = 0; |
c906108c | 1036 | |
c3f6f71d JM |
1037 | return win; |
1038 | } | |
c5aa993b | 1039 | |
77382aee PA |
1040 | /* Register to trace entry to system calls in the process or LWP. |
1041 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1042 | |
d3581e61 | 1043 | static int |
fba45db2 | 1044 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1045 | { |
c3f6f71d JM |
1046 | int win; |
1047 | ||
77382aee PA |
1048 | /* We should never have to apply this operation to any procinfo |
1049 | except the one for the main process. If that ever changes for | |
1050 | any reason, then take out the following clause and replace it | |
1051 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1052 | |
c3f6f71d JM |
1053 | if (pi->tid != 0) |
1054 | pi = find_procinfo_or_die (pi->pid, 0); | |
1055 | ||
44122162 RO |
1056 | struct gdb_proc_ctl_pcsentry { |
1057 | procfs_ctl_t cmd; | |
1058 | /* Use char array to avoid alignment issues. */ | |
1059 | char sysset[sizeof (sysset_t)]; | |
1060 | } *argp; | |
1061 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry); | |
c3f6f71d | 1062 | |
44122162 | 1063 | argp = (struct gdb_proc_ctl_pcsentry *) xmalloc (argp_size); |
c3f6f71d | 1064 | |
44122162 RO |
1065 | argp->cmd = PCSENTRY; |
1066 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
1067 | ||
1068 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1069 | xfree (argp); | |
37de36c6 | 1070 | |
77382aee PA |
1071 | /* The above operation renders the procinfo's cached pstatus |
1072 | obsolete. */ | |
c3f6f71d | 1073 | pi->status_valid = 0; |
19958708 | 1074 | |
c3f6f71d | 1075 | return win; |
c906108c SS |
1076 | } |
1077 | ||
77382aee PA |
1078 | /* Register to trace exit from system calls in the process or LWP. |
1079 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1080 | |
d3581e61 | 1081 | static int |
fba45db2 | 1082 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1083 | { |
1084 | int win; | |
1085 | ||
77382aee PA |
1086 | /* We should never have to apply this operation to any procinfo |
1087 | except the one for the main process. If that ever changes for | |
1088 | any reason, then take out the following clause and replace it | |
1089 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1090 | |
c3f6f71d JM |
1091 | if (pi->tid != 0) |
1092 | pi = find_procinfo_or_die (pi->pid, 0); | |
1093 | ||
44122162 RO |
1094 | struct gdb_proc_ctl_pcsexit { |
1095 | procfs_ctl_t cmd; | |
1096 | /* Use char array to avoid alignment issues. */ | |
1097 | char sysset[sizeof (sysset_t)]; | |
1098 | } *argp; | |
1099 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit); | |
1100 | ||
1101 | argp = (struct gdb_proc_ctl_pcsexit *) xmalloc (argp_size); | |
c906108c | 1102 | |
44122162 RO |
1103 | argp->cmd = PCSEXIT; |
1104 | memcpy (&argp->sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1105 | |
44122162 RO |
1106 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
1107 | xfree (argp); | |
37de36c6 | 1108 | |
77382aee PA |
1109 | /* The above operation renders the procinfo's cached pstatus |
1110 | obsolete. */ | |
c3f6f71d | 1111 | pi->status_valid = 0; |
c906108c | 1112 | |
c3f6f71d JM |
1113 | return win; |
1114 | } | |
c906108c | 1115 | |
77382aee PA |
1116 | /* Specify the set of blocked / held signals in the process or LWP. |
1117 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1118 | |
d3581e61 | 1119 | static int |
44122162 | 1120 | proc_set_held_signals (procinfo *pi, sigset_t *sighold) |
c906108c | 1121 | { |
c3f6f71d JM |
1122 | int win; |
1123 | ||
77382aee PA |
1124 | /* We should never have to apply this operation to any procinfo |
1125 | except the one for the main process. If that ever changes for | |
1126 | any reason, then take out the following clause and replace it | |
1127 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1128 | |
c3f6f71d JM |
1129 | if (pi->tid != 0) |
1130 | pi = find_procinfo_or_die (pi->pid, 0); | |
1131 | ||
44122162 RO |
1132 | struct { |
1133 | procfs_ctl_t cmd; | |
1134 | /* Use char array to avoid alignment issues. */ | |
1135 | char hold[sizeof (sigset_t)]; | |
1136 | } arg; | |
1137 | ||
1138 | arg.cmd = PCSHOLD; | |
1139 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1140 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1141 | ||
77382aee PA |
1142 | /* The above operation renders the procinfo's cached pstatus |
1143 | obsolete. */ | |
c3f6f71d JM |
1144 | pi->status_valid = 0; |
1145 | ||
1146 | return win; | |
c906108c SS |
1147 | } |
1148 | ||
77382aee PA |
1149 | /* Returns the set of signals that are held / blocked. Will also copy |
1150 | the sigset if SAVE is non-zero. */ | |
c906108c | 1151 | |
44122162 RO |
1152 | static sigset_t * |
1153 | proc_get_held_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1154 | { |
44122162 | 1155 | sigset_t *ret = NULL; |
c3f6f71d | 1156 | |
77382aee PA |
1157 | /* We should never have to apply this operation to any procinfo |
1158 | except the one for the main process. If that ever changes for | |
1159 | any reason, then take out the following clause and replace it | |
1160 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1161 | |
c3f6f71d JM |
1162 | if (pi->tid != 0) |
1163 | pi = find_procinfo_or_die (pi->pid, 0); | |
1164 | ||
c3f6f71d JM |
1165 | if (!pi->status_valid) |
1166 | if (!proc_get_status (pi)) | |
1167 | return NULL; | |
1168 | ||
c3f6f71d | 1169 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d | 1170 | if (save && ret) |
44122162 | 1171 | memcpy (save, ret, sizeof (sigset_t)); |
c3f6f71d JM |
1172 | |
1173 | return ret; | |
c906108c SS |
1174 | } |
1175 | ||
77382aee PA |
1176 | /* Returns the set of signals that are traced / debugged. Will also |
1177 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1178 | |
44122162 RO |
1179 | static sigset_t * |
1180 | proc_get_traced_signals (procinfo *pi, sigset_t *save) | |
c906108c | 1181 | { |
44122162 | 1182 | sigset_t *ret = NULL; |
c3f6f71d | 1183 | |
77382aee PA |
1184 | /* We should never have to apply this operation to any procinfo |
1185 | except the one for the main process. If that ever changes for | |
1186 | any reason, then take out the following clause and replace it | |
1187 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1188 | |
c3f6f71d JM |
1189 | if (pi->tid != 0) |
1190 | pi = find_procinfo_or_die (pi->pid, 0); | |
1191 | ||
c3f6f71d JM |
1192 | if (!pi->status_valid) |
1193 | if (!proc_get_status (pi)) | |
1194 | return NULL; | |
1195 | ||
1196 | ret = &pi->prstatus.pr_sigtrace; | |
c3f6f71d | 1197 | if (save && ret) |
44122162 | 1198 | memcpy (save, ret, sizeof (sigset_t)); |
c906108c | 1199 | |
c3f6f71d JM |
1200 | return ret; |
1201 | } | |
c906108c | 1202 | |
77382aee PA |
1203 | /* Returns the set of hardware faults that are traced /debugged. Will |
1204 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1205 | |
d3581e61 | 1206 | static fltset_t * |
fba45db2 | 1207 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1208 | { |
1209 | fltset_t *ret = NULL; | |
1210 | ||
77382aee PA |
1211 | /* We should never have to apply this operation to any procinfo |
1212 | except the one for the main process. If that ever changes for | |
1213 | any reason, then take out the following clause and replace it | |
1214 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1215 | |
c3f6f71d JM |
1216 | if (pi->tid != 0) |
1217 | pi = find_procinfo_or_die (pi->pid, 0); | |
1218 | ||
c3f6f71d JM |
1219 | if (!pi->status_valid) |
1220 | if (!proc_get_status (pi)) | |
1221 | return NULL; | |
1222 | ||
1223 | ret = &pi->prstatus.pr_flttrace; | |
c3f6f71d JM |
1224 | if (save && ret) |
1225 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1226 | |
c3f6f71d JM |
1227 | return ret; |
1228 | } | |
c906108c | 1229 | |
77382aee PA |
1230 | /* Returns the set of syscalls that are traced /debugged on entry. |
1231 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1232 | |
d3581e61 | 1233 | static sysset_t * |
fba45db2 | 1234 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1235 | { |
1236 | sysset_t *ret = NULL; | |
1237 | ||
77382aee PA |
1238 | /* We should never have to apply this operation to any procinfo |
1239 | except the one for the main process. If that ever changes for | |
1240 | any reason, then take out the following clause and replace it | |
1241 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1242 | |
c3f6f71d JM |
1243 | if (pi->tid != 0) |
1244 | pi = find_procinfo_or_die (pi->pid, 0); | |
1245 | ||
c3f6f71d JM |
1246 | if (!pi->status_valid) |
1247 | if (!proc_get_status (pi)) | |
1248 | return NULL; | |
1249 | ||
1250 | ret = &pi->prstatus.pr_sysentry; | |
c3f6f71d | 1251 | if (save && ret) |
44122162 | 1252 | memcpy (save, ret, sizeof (sysset_t)); |
c906108c | 1253 | |
c3f6f71d JM |
1254 | return ret; |
1255 | } | |
c5aa993b | 1256 | |
77382aee PA |
1257 | /* Returns the set of syscalls that are traced /debugged on exit. |
1258 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1259 | |
d3581e61 | 1260 | static sysset_t * |
fba45db2 | 1261 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1262 | { |
44122162 | 1263 | sysset_t *ret = NULL; |
c3f6f71d | 1264 | |
77382aee PA |
1265 | /* We should never have to apply this operation to any procinfo |
1266 | except the one for the main process. If that ever changes for | |
1267 | any reason, then take out the following clause and replace it | |
1268 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1269 | |
c3f6f71d JM |
1270 | if (pi->tid != 0) |
1271 | pi = find_procinfo_or_die (pi->pid, 0); | |
1272 | ||
c3f6f71d JM |
1273 | if (!pi->status_valid) |
1274 | if (!proc_get_status (pi)) | |
1275 | return NULL; | |
1276 | ||
1277 | ret = &pi->prstatus.pr_sysexit; | |
c3f6f71d | 1278 | if (save && ret) |
44122162 | 1279 | memcpy (save, ret, sizeof (sysset_t)); |
c3f6f71d JM |
1280 | |
1281 | return ret; | |
1282 | } | |
c906108c | 1283 | |
77382aee PA |
1284 | /* The current fault (if any) is cleared; the associated signal will |
1285 | not be sent to the process or LWP when it resumes. Returns | |
1286 | non-zero for success, zero for failure. */ | |
c906108c | 1287 | |
d3581e61 | 1288 | static int |
fba45db2 | 1289 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
1290 | { |
1291 | int win; | |
1292 | ||
77382aee PA |
1293 | /* We should never have to apply this operation to any procinfo |
1294 | except the one for the main process. If that ever changes for | |
1295 | any reason, then take out the following clause and replace it | |
1296 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1297 | |
c3f6f71d JM |
1298 | if (pi->tid != 0) |
1299 | pi = find_procinfo_or_die (pi->pid, 0); | |
1300 | ||
44122162 | 1301 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 1302 | |
44122162 | 1303 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
c3f6f71d JM |
1304 | |
1305 | return win; | |
c906108c SS |
1306 | } |
1307 | ||
77382aee PA |
1308 | /* Set the "current signal" that will be delivered next to the |
1309 | process. NOTE: semantics are different from those of KILL. This | |
1310 | signal will be delivered to the process or LWP immediately when it | |
1311 | is resumed (even if the signal is held/blocked); it will NOT | |
1312 | immediately cause another event of interest, and will NOT first | |
1313 | trap back to the debugger. Returns non-zero for success, zero for | |
1314 | failure. */ | |
c3f6f71d | 1315 | |
d3581e61 | 1316 | static int |
fba45db2 | 1317 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
1318 | { |
1319 | int win; | |
1320 | struct { | |
37de36c6 | 1321 | procfs_ctl_t cmd; |
c3f6f71d | 1322 | /* Use char array to avoid alignment issues. */ |
44122162 | 1323 | char sinfo[sizeof (siginfo_t)]; |
c3f6f71d | 1324 | } arg; |
44122162 | 1325 | siginfo_t mysinfo; |
c162e8c9 JM |
1326 | ptid_t wait_ptid; |
1327 | struct target_waitstatus wait_status; | |
c3f6f71d | 1328 | |
77382aee PA |
1329 | /* We should never have to apply this operation to any procinfo |
1330 | except the one for the main process. If that ever changes for | |
1331 | any reason, then take out the following clause and replace it | |
1332 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1333 | |
c3f6f71d JM |
1334 | if (pi->tid != 0) |
1335 | pi = find_procinfo_or_die (pi->pid, 0); | |
1336 | ||
c3f6f71d | 1337 | /* The pointer is just a type alias. */ |
c162e8c9 JM |
1338 | get_last_target_status (&wait_ptid, &wait_status); |
1339 | if (ptid_equal (wait_ptid, inferior_ptid) | |
1340 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 1341 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 | 1342 | && proc_get_status (pi) |
c162e8c9 | 1343 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
c162e8c9 JM |
1344 | ) |
1345 | /* Use the siginfo associated with the signal being | |
1346 | redelivered. */ | |
44122162 | 1347 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (siginfo_t)); |
c162e8c9 JM |
1348 | else |
1349 | { | |
73930d4d KH |
1350 | mysinfo.si_signo = signo; |
1351 | mysinfo.si_code = 0; | |
1352 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1353 | mysinfo.si_uid = getuid (); /* ?why? */ | |
44122162 | 1354 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); |
c162e8c9 | 1355 | } |
c3f6f71d | 1356 | |
c3f6f71d JM |
1357 | arg.cmd = PCSSIG; |
1358 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1359 | |
c3f6f71d JM |
1360 | return win; |
1361 | } | |
c906108c | 1362 | |
77382aee PA |
1363 | /* The current signal (if any) is cleared, and is not sent to the |
1364 | process or LWP when it resumes. Returns non-zero for success, zero | |
1365 | for failure. */ | |
c906108c | 1366 | |
d3581e61 | 1367 | static int |
fba45db2 | 1368 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
1369 | { |
1370 | int win; | |
1371 | ||
77382aee PA |
1372 | /* We should never have to apply this operation to any procinfo |
1373 | except the one for the main process. If that ever changes for | |
1374 | any reason, then take out the following clause and replace it | |
1375 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1376 | |
c3f6f71d JM |
1377 | if (pi->tid != 0) |
1378 | pi = find_procinfo_or_die (pi->pid, 0); | |
1379 | ||
44122162 RO |
1380 | struct { |
1381 | procfs_ctl_t cmd; | |
1382 | /* Use char array to avoid alignment issues. */ | |
1383 | char sinfo[sizeof (siginfo_t)]; | |
1384 | } arg; | |
1385 | siginfo_t mysinfo; | |
1386 | ||
1387 | arg.cmd = PCSSIG; | |
1388 | /* The pointer is just a type alias. */ | |
1389 | mysinfo.si_signo = 0; | |
1390 | mysinfo.si_code = 0; | |
1391 | mysinfo.si_errno = 0; | |
1392 | mysinfo.si_pid = getpid (); /* ?why? */ | |
1393 | mysinfo.si_uid = getuid (); /* ?why? */ | |
1394 | memcpy (arg.sinfo, &mysinfo, sizeof (siginfo_t)); | |
1395 | ||
1396 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1397 | |
c3f6f71d JM |
1398 | return win; |
1399 | } | |
c906108c | 1400 | |
772cf8be MK |
1401 | /* Return the general-purpose registers for the process or LWP |
1402 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1403 | |
d3581e61 | 1404 | static gdb_gregset_t * |
fba45db2 | 1405 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
1406 | { |
1407 | if (!pi->status_valid || !pi->gregs_valid) | |
1408 | if (!proc_get_status (pi)) | |
1409 | return NULL; | |
1410 | ||
c3f6f71d | 1411 | return &pi->prstatus.pr_lwp.pr_reg; |
c3f6f71d | 1412 | } |
c5aa993b | 1413 | |
772cf8be MK |
1414 | /* Return the general-purpose registers for the process or LWP |
1415 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 1416 | |
d3581e61 | 1417 | static gdb_fpregset_t * |
fba45db2 | 1418 | proc_get_fpregs (procinfo *pi) |
c906108c | 1419 | { |
c3f6f71d JM |
1420 | if (!pi->status_valid || !pi->fpregs_valid) |
1421 | if (!proc_get_status (pi)) | |
1422 | return NULL; | |
1423 | ||
c3f6f71d | 1424 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c906108c SS |
1425 | } |
1426 | ||
772cf8be MK |
1427 | /* Write the general-purpose registers back to the process or LWP |
1428 | corresponding to PI. Return non-zero for success, zero for | |
1429 | failure. */ | |
c3f6f71d | 1430 | |
d3581e61 | 1431 | static int |
fba45db2 | 1432 | proc_set_gregs (procinfo *pi) |
c906108c | 1433 | { |
c3f6f71d JM |
1434 | gdb_gregset_t *gregs; |
1435 | int win; | |
c5aa993b | 1436 | |
772cf8be MK |
1437 | gregs = proc_get_gregs (pi); |
1438 | if (gregs == NULL) | |
1439 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 1440 | |
772cf8be | 1441 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1442 | { |
c3f6f71d | 1443 | return 0; |
c906108c | 1444 | } |
c3f6f71d | 1445 | else |
c906108c | 1446 | { |
c3f6f71d | 1447 | struct { |
37de36c6 | 1448 | procfs_ctl_t cmd; |
c3f6f71d JM |
1449 | /* Use char array to avoid alignment issues. */ |
1450 | char gregs[sizeof (gdb_gregset_t)]; | |
1451 | } arg; | |
1452 | ||
772cf8be | 1453 | arg.cmd = PCSREG; |
c3f6f71d JM |
1454 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
1455 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1456 | } |
c3f6f71d | 1457 | |
772cf8be | 1458 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1459 | pi->gregs_valid = 0; |
1460 | return win; | |
c906108c SS |
1461 | } |
1462 | ||
772cf8be MK |
1463 | /* Write the floating-pointer registers back to the process or LWP |
1464 | corresponding to PI. Return non-zero for success, zero for | |
1465 | failure. */ | |
c3f6f71d | 1466 | |
d3581e61 | 1467 | static int |
fba45db2 | 1468 | proc_set_fpregs (procinfo *pi) |
c906108c | 1469 | { |
c3f6f71d JM |
1470 | gdb_fpregset_t *fpregs; |
1471 | int win; | |
1472 | ||
772cf8be MK |
1473 | fpregs = proc_get_fpregs (pi); |
1474 | if (fpregs == NULL) | |
1475 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 1476 | |
772cf8be | 1477 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 1478 | { |
c3f6f71d | 1479 | return 0; |
c906108c | 1480 | } |
c3f6f71d | 1481 | else |
c906108c | 1482 | { |
c3f6f71d | 1483 | struct { |
37de36c6 | 1484 | procfs_ctl_t cmd; |
c3f6f71d JM |
1485 | /* Use char array to avoid alignment issues. */ |
1486 | char fpregs[sizeof (gdb_fpregset_t)]; | |
1487 | } arg; | |
1488 | ||
772cf8be | 1489 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
1490 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
1491 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
c906108c | 1492 | } |
c3f6f71d | 1493 | |
772cf8be | 1494 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
1495 | pi->fpregs_valid = 0; |
1496 | return win; | |
c906108c SS |
1497 | } |
1498 | ||
77382aee PA |
1499 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
1500 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1501 | |
d3581e61 | 1502 | static int |
fba45db2 | 1503 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
1504 | { |
1505 | int win; | |
c906108c | 1506 | |
77382aee PA |
1507 | /* We might conceivably apply this operation to an LWP, and the |
1508 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1509 | |
c3f6f71d JM |
1510 | if (pi->ctl_fd == 0 && |
1511 | open_procinfo_files (pi, FD_CTL) == 0) | |
1512 | { | |
1513 | return 0; | |
1514 | } | |
1515 | else | |
1516 | { | |
37de36c6 | 1517 | procfs_ctl_t cmd[2]; |
c906108c | 1518 | |
c3f6f71d JM |
1519 | cmd[0] = PCKILL; |
1520 | cmd[1] = signo; | |
1521 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
c3f6f71d | 1522 | } |
c906108c | 1523 | |
c3f6f71d JM |
1524 | return win; |
1525 | } | |
c906108c | 1526 | |
77382aee PA |
1527 | /* Find the pid of the process that started this one. Returns the |
1528 | parent process pid, or zero. */ | |
c906108c | 1529 | |
d3581e61 | 1530 | static int |
fba45db2 | 1531 | proc_parent_pid (procinfo *pi) |
c906108c | 1532 | { |
77382aee PA |
1533 | /* We should never have to apply this operation to any procinfo |
1534 | except the one for the main process. If that ever changes for | |
1535 | any reason, then take out the following clause and replace it | |
1536 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1537 | |
c3f6f71d JM |
1538 | if (pi->tid != 0) |
1539 | pi = find_procinfo_or_die (pi->pid, 0); | |
1540 | ||
1541 | if (!pi->status_valid) | |
1542 | if (!proc_get_status (pi)) | |
1543 | return 0; | |
c5aa993b | 1544 | |
c3f6f71d JM |
1545 | return pi->prstatus.pr_ppid; |
1546 | } | |
1547 | ||
9a043c1d AC |
1548 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
1549 | (a.k.a void pointer)! */ | |
1550 | ||
1551 | static void * | |
1552 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
1553 | { | |
f5656ead | 1554 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
1555 | void *ptr; |
1556 | ||
4e906f53 | 1557 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 1558 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 1559 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
1560 | return ptr; |
1561 | } | |
1562 | ||
a0911fd0 | 1563 | static int |
fba45db2 | 1564 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 1565 | { |
c3f6f71d | 1566 | struct { |
37de36c6 | 1567 | procfs_ctl_t cmd; |
c3f6f71d JM |
1568 | char watch[sizeof (prwatch_t)]; |
1569 | } arg; | |
73930d4d | 1570 | prwatch_t pwatch; |
c3f6f71d | 1571 | |
9a043c1d AC |
1572 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
1573 | convert a target address into something that can be stored in a | |
1574 | native data structure. */ | |
73930d4d | 1575 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
73930d4d KH |
1576 | pwatch.pr_size = len; |
1577 | pwatch.pr_wflags = wflags; | |
c3f6f71d | 1578 | arg.cmd = PCWATCH; |
73930d4d | 1579 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d | 1580 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
c906108c SS |
1581 | } |
1582 | ||
965b60ee | 1583 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 1584 | |
c3f6f71d | 1585 | #include <sys/sysi86.h> |
c906108c | 1586 | |
77382aee PA |
1587 | /* The KEY is actually the value of the lower 16 bits of the GS |
1588 | register for the LWP that we're interested in. Returns the | |
1589 | matching ssh struct (LDT entry). */ | |
c906108c | 1590 | |
337c776f | 1591 | static struct ssd * |
fba45db2 | 1592 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 1593 | { |
c3f6f71d | 1594 | static struct ssd *ldt_entry = NULL; |
c3f6f71d JM |
1595 | char pathname[MAX_PROC_NAME_SIZE]; |
1596 | struct cleanup *old_chain = NULL; | |
1597 | int fd; | |
1598 | ||
1599 | /* Allocate space for one LDT entry. | |
1600 | This alloc must persist, because we return a pointer to it. */ | |
1601 | if (ldt_entry == NULL) | |
8d749320 | 1602 | ldt_entry = XNEW (struct ssd); |
c3f6f71d JM |
1603 | |
1604 | /* Open the file descriptor for the LDT table. */ | |
1605 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 1606 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 1607 | { |
c3f6f71d JM |
1608 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
1609 | return NULL; | |
c906108c | 1610 | } |
0df8b418 | 1611 | /* Make sure it gets closed again! */ |
004527cb | 1612 | old_chain = make_cleanup_close (fd); |
c906108c | 1613 | |
c3f6f71d JM |
1614 | /* Now 'read' thru the table, find a match and return it. */ |
1615 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 1616 | { |
c3f6f71d JM |
1617 | if (ldt_entry->sel == 0 && |
1618 | ldt_entry->bo == 0 && | |
1619 | ldt_entry->acc1 == 0 && | |
1620 | ldt_entry->acc2 == 0) | |
1621 | break; /* end of table */ | |
0df8b418 | 1622 | /* If key matches, return this entry. */ |
c3f6f71d | 1623 | if (ldt_entry->sel == key) |
b196bc4c RO |
1624 | { |
1625 | do_cleanups (old_chain); | |
1626 | return ldt_entry; | |
1627 | } | |
c906108c | 1628 | } |
0df8b418 | 1629 | /* Loop ended, match not found. */ |
b196bc4c | 1630 | do_cleanups (old_chain); |
c3f6f71d | 1631 | return NULL; |
c3f6f71d | 1632 | } |
c906108c | 1633 | |
77382aee | 1634 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
1635 | |
1636 | struct ssd * | |
1637 | procfs_find_LDT_entry (ptid_t ptid) | |
1638 | { | |
1639 | gdb_gregset_t *gregs; | |
1640 | int key; | |
1641 | procinfo *pi; | |
1642 | ||
0df8b418 | 1643 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 1644 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 1645 | { |
0b62613e | 1646 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 1647 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1648 | return NULL; |
1649 | } | |
0df8b418 | 1650 | /* get its general registers. */ |
965b60ee JB |
1651 | if ((gregs = proc_get_gregs (pi)) == NULL) |
1652 | { | |
0b62613e | 1653 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 1654 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
1655 | return NULL; |
1656 | } | |
0df8b418 | 1657 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
1658 | key = (*gregs)[GS] & 0xffff; |
1659 | ||
0df8b418 | 1660 | /* Find the matching entry and return it. */ |
965b60ee JB |
1661 | return proc_get_LDT_entry (pi, key); |
1662 | } | |
1663 | ||
1664 | #endif | |
c906108c | 1665 | |
c3f6f71d | 1666 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 1667 | |
c3f6f71d | 1668 | /* =================== Thread "MODULE" =================== */ |
c906108c | 1669 | |
44122162 RO |
1670 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
1671 | since there is a different way to do threads on every OS. */ | |
c906108c | 1672 | |
44122162 | 1673 | /* Returns the number of threads for the process. */ |
c906108c | 1674 | |
d3581e61 | 1675 | static int |
fba45db2 | 1676 | proc_get_nthreads (procinfo *pi) |
c906108c | 1677 | { |
c3f6f71d JM |
1678 | if (!pi->status_valid) |
1679 | if (!proc_get_status (pi)) | |
1680 | return 0; | |
c5aa993b | 1681 | |
44122162 RO |
1682 | /* Only works for the process procinfo, because the LWP procinfos do not |
1683 | get prstatus filled in. */ | |
0df8b418 | 1684 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 1685 | pi = find_procinfo_or_die (pi->pid, 0); |
c3f6f71d | 1686 | return pi->prstatus.pr_nlwp; |
c906108c SS |
1687 | } |
1688 | ||
77382aee PA |
1689 | /* LWP version. |
1690 | ||
1691 | Return the ID of the thread that had an event of interest. | |
1692 | (ie. the one that hit a breakpoint or other traced event). All | |
1693 | other things being equal, this should be the ID of a thread that is | |
1694 | currently executing. */ | |
c3f6f71d | 1695 | |
d3581e61 | 1696 | static int |
fba45db2 | 1697 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 1698 | { |
77382aee PA |
1699 | /* Note: this should be applied to the root procinfo for the |
1700 | process, not to the procinfo for an LWP. If applied to the | |
1701 | procinfo for an LWP, it will simply return that LWP's ID. In | |
1702 | that case, find the parent process procinfo. */ | |
19958708 | 1703 | |
c3f6f71d JM |
1704 | if (pi->tid != 0) |
1705 | pi = find_procinfo_or_die (pi->pid, 0); | |
1706 | ||
1707 | if (!pi->status_valid) | |
1708 | if (!proc_get_status (pi)) | |
1709 | return 0; | |
1710 | ||
c3f6f71d | 1711 | return pi->prstatus.pr_lwp.pr_lwpid; |
c3f6f71d JM |
1712 | } |
1713 | ||
77382aee PA |
1714 | /* Discover the IDs of all the threads within the process, and create |
1715 | a procinfo for each of them (chained to the parent). This | |
1716 | unfortunately requires a different method on every OS. Returns | |
1717 | non-zero for success, zero for failure. */ | |
c906108c | 1718 | |
a0911fd0 | 1719 | static int |
fba45db2 | 1720 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
1721 | { |
1722 | if (thread && parent) /* sanity */ | |
c906108c | 1723 | { |
c3f6f71d JM |
1724 | thread->status_valid = 0; |
1725 | if (!proc_get_status (thread)) | |
1726 | destroy_one_procinfo (&parent->thread_list, thread); | |
1727 | } | |
1728 | return 0; /* keep iterating */ | |
1729 | } | |
c5aa993b | 1730 | |
004527cb AC |
1731 | static void |
1732 | do_closedir_cleanup (void *dir) | |
1733 | { | |
b196bc4c | 1734 | closedir ((DIR *) dir); |
004527cb AC |
1735 | } |
1736 | ||
d3581e61 | 1737 | static int |
fba45db2 | 1738 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
1739 | { |
1740 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
1741 | struct dirent *direntry; | |
1742 | struct cleanup *old_chain = NULL; | |
1743 | procinfo *thread; | |
1744 | DIR *dirp; | |
1745 | int lwpid; | |
1746 | ||
77382aee PA |
1747 | /* We should never have to apply this operation to any procinfo |
1748 | except the one for the main process. If that ever changes for | |
1749 | any reason, then take out the following clause and replace it | |
1750 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1751 | |
c3f6f71d JM |
1752 | if (pi->tid != 0) |
1753 | pi = find_procinfo_or_die (pi->pid, 0); | |
1754 | ||
1755 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
1756 | ||
05b4bd79 PA |
1757 | /* Note: this brute-force method was originally devised for Unixware |
1758 | (support removed since), and will also work on Solaris 2.6 and | |
1759 | 2.7. The original comment mentioned the existence of a much | |
1760 | simpler and more elegant way to do this on Solaris, but didn't | |
1761 | point out what that was. */ | |
c3f6f71d JM |
1762 | |
1763 | strcpy (pathname, pi->pathname); | |
1764 | strcat (pathname, "/lwp"); | |
1765 | if ((dirp = opendir (pathname)) == NULL) | |
1766 | proc_error (pi, "update_threads, opendir", __LINE__); | |
1767 | ||
004527cb | 1768 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
1769 | while ((direntry = readdir (dirp)) != NULL) |
1770 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
1771 | { | |
1772 | lwpid = atoi (&direntry->d_name[0]); | |
1773 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
1774 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
1775 | } | |
1776 | pi->threads_valid = 1; | |
1777 | do_cleanups (old_chain); | |
1778 | return 1; | |
1779 | } | |
c906108c | 1780 | |
77382aee PA |
1781 | /* Given a pointer to a function, call that function once for each lwp |
1782 | in the procinfo list, until the function returns non-zero, in which | |
1783 | event return the value returned by the function. | |
1784 | ||
1785 | Note: this function does NOT call update_threads. If you want to | |
1786 | discover new threads first, you must call that function explicitly. | |
1787 | This function just makes a quick pass over the currently-known | |
1788 | procinfos. | |
1789 | ||
1790 | PI is the parent process procinfo. FUNC is the per-thread | |
1791 | function. PTR is an opaque parameter for function. Returns the | |
1792 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 1793 | |
d3581e61 | 1794 | static int |
d0849a9a KB |
1795 | proc_iterate_over_threads (procinfo *pi, |
1796 | int (*func) (procinfo *, procinfo *, void *), | |
1797 | void *ptr) | |
c906108c | 1798 | { |
c3f6f71d JM |
1799 | procinfo *thread, *next; |
1800 | int retval = 0; | |
c906108c | 1801 | |
77382aee PA |
1802 | /* We should never have to apply this operation to any procinfo |
1803 | except the one for the main process. If that ever changes for | |
1804 | any reason, then take out the following clause and replace it | |
1805 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1806 | |
c3f6f71d JM |
1807 | if (pi->tid != 0) |
1808 | pi = find_procinfo_or_die (pi->pid, 0); | |
1809 | ||
1810 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 1811 | { |
0df8b418 | 1812 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
1813 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
1814 | break; | |
c906108c | 1815 | } |
c3f6f71d JM |
1816 | |
1817 | return retval; | |
c906108c SS |
1818 | } |
1819 | ||
c3f6f71d JM |
1820 | /* =================== END, Thread "MODULE" =================== */ |
1821 | ||
1822 | /* =================== END, /proc "MODULE" =================== */ | |
1823 | ||
1824 | /* =================== GDB "MODULE" =================== */ | |
1825 | ||
77382aee PA |
1826 | /* Here are all of the gdb target vector functions and their |
1827 | friends. */ | |
c3f6f71d | 1828 | |
39f77062 | 1829 | static ptid_t do_attach (ptid_t ptid); |
6bd6f3b6 | 1830 | static void do_detach (); |
9185ddce | 1831 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 1832 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 1833 | |
77382aee PA |
1834 | /* Sets up the inferior to be debugged. Registers to trace signals, |
1835 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
1836 | may want to customize that. Returns zero for success (note! | |
1837 | unlike most functions in this module); on failure, returns the LINE | |
1838 | NUMBER where it failed! */ | |
c3f6f71d JM |
1839 | |
1840 | static int | |
fba45db2 | 1841 | procfs_debug_inferior (procinfo *pi) |
c906108c | 1842 | { |
c3f6f71d | 1843 | fltset_t traced_faults; |
44122162 | 1844 | sigset_t traced_signals; |
37de36c6 KB |
1845 | sysset_t *traced_syscall_entries; |
1846 | sysset_t *traced_syscall_exits; | |
1847 | int status; | |
c906108c | 1848 | |
0df8b418 MS |
1849 | /* Register to trace hardware faults in the child. */ |
1850 | prfillset (&traced_faults); /* trace all faults... */ | |
44122162 | 1851 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
1852 | if (!proc_set_traced_faults (pi, &traced_faults)) |
1853 | return __LINE__; | |
c906108c | 1854 | |
2455069d UW |
1855 | /* Initially, register to trace all signals in the child. */ |
1856 | prfillset (&traced_signals); | |
1857 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
1858 | return __LINE__; |
1859 | ||
37de36c6 | 1860 | |
c3f6f71d | 1861 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 | 1862 | traced_syscall_entries = sysset_t_alloc (pi); |
44122162 RO |
1863 | premptyset (traced_syscall_entries); |
1864 | praddset (traced_syscall_entries, SYS_exit); | |
1865 | praddset (traced_syscall_entries, SYS_lwp_exit); | |
c906108c | 1866 | |
37de36c6 KB |
1867 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
1868 | xfree (traced_syscall_entries); | |
1869 | if (!status) | |
c3f6f71d JM |
1870 | return __LINE__; |
1871 | ||
44122162 | 1872 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
1873 | /* GW: Rationale... |
1874 | Not all systems with /proc have all the exec* syscalls with the same | |
1875 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 1876 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 1877 | |
37de36c6 | 1878 | traced_syscall_exits = sysset_t_alloc (pi); |
44122162 | 1879 | premptyset (traced_syscall_exits); |
c3f6f71d | 1880 | #ifdef SYS_exec |
44122162 | 1881 | praddset (traced_syscall_exits, SYS_exec); |
37de36c6 | 1882 | #endif |
44122162 RO |
1883 | praddset (traced_syscall_exits, SYS_execve); |
1884 | praddset (traced_syscall_exits, SYS_lwp_create); | |
1885 | praddset (traced_syscall_exits, SYS_lwp_exit); | |
c906108c | 1886 | |
37de36c6 KB |
1887 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
1888 | xfree (traced_syscall_exits); | |
1889 | if (!status) | |
c3f6f71d JM |
1890 | return __LINE__; |
1891 | ||
c3f6f71d | 1892 | return 0; |
c906108c SS |
1893 | } |
1894 | ||
19958708 | 1895 | static void |
c0939df1 | 1896 | procfs_attach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 1897 | { |
c3f6f71d JM |
1898 | char *exec_file; |
1899 | int pid; | |
1900 | ||
74164c56 | 1901 | pid = parse_pid_to_attach (args); |
c3f6f71d | 1902 | |
c3f6f71d | 1903 | if (pid == getpid ()) |
8a3fe4f8 | 1904 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 1905 | |
c3f6f71d | 1906 | if (from_tty) |
c906108c | 1907 | { |
c3f6f71d JM |
1908 | exec_file = get_exec_file (0); |
1909 | ||
1910 | if (exec_file) | |
a3f17187 | 1911 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 1912 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 1913 | else |
a3f17187 | 1914 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 1915 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
1916 | |
1917 | fflush (stdout); | |
c906108c | 1918 | } |
39f77062 | 1919 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
6a3cb8e8 PA |
1920 | if (!target_is_pushed (ops)) |
1921 | push_target (ops); | |
c3f6f71d JM |
1922 | } |
1923 | ||
19958708 | 1924 | static void |
6e1e1966 | 1925 | procfs_detach (struct target_ops *ops, inferior *inf, int from_tty) |
c3f6f71d | 1926 | { |
dfd4cc63 | 1927 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b | 1928 | |
c3f6f71d | 1929 | if (from_tty) |
c906108c | 1930 | { |
995816ba | 1931 | const char *exec_file; |
cc377e6b | 1932 | |
c3f6f71d | 1933 | exec_file = get_exec_file (0); |
cc377e6b | 1934 | if (exec_file == NULL) |
c3f6f71d | 1935 | exec_file = ""; |
cc377e6b | 1936 | |
a3f17187 | 1937 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
1938 | target_pid_to_str (pid_to_ptid (pid))); |
1939 | gdb_flush (gdb_stdout); | |
c906108c | 1940 | } |
19958708 | 1941 | |
6bd6f3b6 | 1942 | do_detach (); |
cc377e6b | 1943 | |
39f77062 | 1944 | inferior_ptid = null_ptid; |
7f9f62ba | 1945 | detach_inferior (pid); |
6a3cb8e8 | 1946 | inf_child_maybe_unpush_target (ops); |
c906108c SS |
1947 | } |
1948 | ||
39f77062 KB |
1949 | static ptid_t |
1950 | do_attach (ptid_t ptid) | |
c906108c | 1951 | { |
c3f6f71d | 1952 | procinfo *pi; |
181e7f93 | 1953 | struct inferior *inf; |
c3f6f71d | 1954 | int fail; |
2689673f | 1955 | int lwpid; |
c3f6f71d | 1956 | |
dfd4cc63 | 1957 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 1958 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
1959 | |
1960 | if (!open_procinfo_files (pi, FD_CTL)) | |
1961 | { | |
1962 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 1963 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 1964 | ptid_get_pid (ptid)); |
c3f6f71d JM |
1965 | dead_procinfo (pi, errmsg, NOKILL); |
1966 | } | |
c906108c | 1967 | |
c3f6f71d JM |
1968 | /* Stop the process (if it isn't already stopped). */ |
1969 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 1970 | { |
c3f6f71d JM |
1971 | pi->was_stopped = 1; |
1972 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
1973 | } |
1974 | else | |
1975 | { | |
c3f6f71d JM |
1976 | pi->was_stopped = 0; |
1977 | /* Set the process to run again when we close it. */ | |
1978 | if (!proc_set_run_on_last_close (pi)) | |
1979 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
1980 | ||
0df8b418 | 1981 | /* Now stop the process. */ |
c3f6f71d JM |
1982 | if (!proc_stop_process (pi)) |
1983 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
1984 | pi->ignore_next_sigstop = 1; | |
c906108c | 1985 | } |
c3f6f71d JM |
1986 | /* Save some of the /proc state to be restored if we detach. */ |
1987 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
1988 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
1989 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
1990 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 1991 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
1992 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
1993 | NOKILL); | |
37de36c6 | 1994 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 1995 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
1996 | NOKILL); |
1997 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
1998 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
1999 | ||
2000 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
2001 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
2002 | ||
6c95b8df PA |
2003 | inf = current_inferior (); |
2004 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 2005 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 2006 | inf->attach_flag = 1; |
2689673f PA |
2007 | |
2008 | /* Create a procinfo for the current lwp. */ | |
2009 | lwpid = proc_get_current_thread (pi); | |
2010 | create_procinfo (pi->pid, lwpid); | |
2011 | ||
2012 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 2013 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
2014 | add_thread (ptid); |
2015 | ||
2016 | return ptid; | |
c906108c SS |
2017 | } |
2018 | ||
2019 | static void | |
6bd6f3b6 | 2020 | do_detach () |
c906108c | 2021 | { |
c3f6f71d | 2022 | procinfo *pi; |
c906108c | 2023 | |
0df8b418 | 2024 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
2025 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
2026 | 0); /* FIXME: threads */ | |
c5aa993b | 2027 | |
c3f6f71d JM |
2028 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
2029 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 2030 | |
c3f6f71d JM |
2031 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
2032 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
2033 | ||
37de36c6 | 2034 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
2035 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
2036 | ||
37de36c6 | 2037 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2038 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
2039 | ||
2040 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
2041 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
2042 | ||
6bd6f3b6 SM |
2043 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
2044 | if (!(pi->was_stopped) | |
2045 | || query (_("Was stopped when attached, make it runnable again? "))) | |
c3f6f71d JM |
2046 | { |
2047 | /* Clear any pending signal. */ | |
2048 | if (!proc_clear_current_fault (pi)) | |
2049 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
2050 | ||
6bd6f3b6 | 2051 | if (!proc_clear_current_signal (pi)) |
1a303dec MS |
2052 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
2053 | ||
c3f6f71d JM |
2054 | if (!proc_set_run_on_last_close (pi)) |
2055 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
2056 | } | |
2057 | ||
c3f6f71d | 2058 | destroy_procinfo (pi); |
c906108c SS |
2059 | } |
2060 | ||
772cf8be MK |
2061 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
2062 | for all registers. | |
2063 | ||
2064 | ??? Is the following note still relevant? We can't get individual | |
2065 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
2066 | don't bother with caching at all in that case. | |
2067 | ||
2068 | NOTE: Since the /proc interface cannot give us individual | |
2069 | registers, we pay no attention to REGNUM, and just fetch them all. | |
2070 | This results in the possibility that we will do unnecessarily many | |
2071 | fetches, since we may be called repeatedly for individual | |
2072 | registers. So we cache the results, and mark the cache invalid | |
2073 | when the process is resumed. */ | |
c3f6f71d | 2074 | |
c906108c | 2075 | static void |
28439f5e PA |
2076 | procfs_fetch_registers (struct target_ops *ops, |
2077 | struct regcache *regcache, int regnum) | |
c906108c | 2078 | { |
772cf8be MK |
2079 | gdb_gregset_t *gregs; |
2080 | procinfo *pi; | |
bcc0c096 SM |
2081 | ptid_t ptid = regcache_get_ptid (regcache); |
2082 | int pid = ptid_get_pid (ptid); | |
2083 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2084 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2085 | |
2689673f | 2086 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2087 | |
2088 | if (pi == NULL) | |
8a3fe4f8 | 2089 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
bcc0c096 | 2090 | target_pid_to_str (ptid)); |
c3f6f71d | 2091 | |
772cf8be MK |
2092 | gregs = proc_get_gregs (pi); |
2093 | if (gregs == NULL) | |
c3f6f71d JM |
2094 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
2095 | ||
56be3814 | 2096 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 2097 | |
40a6adc1 | 2098 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2099 | { |
772cf8be MK |
2100 | gdb_fpregset_t *fpregs; |
2101 | ||
40a6adc1 MD |
2102 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2103 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2104 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2105 | return; /* Not a floating point register. */ |
c5aa993b | 2106 | |
772cf8be MK |
2107 | fpregs = proc_get_fpregs (pi); |
2108 | if (fpregs == NULL) | |
60054393 | 2109 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 2110 | |
56be3814 | 2111 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 2112 | } |
c906108c SS |
2113 | } |
2114 | ||
772cf8be MK |
2115 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
2116 | this for all registers. | |
2117 | ||
2118 | NOTE: Since the /proc interface will not read individual registers, | |
2119 | we will cache these requests until the process is resumed, and only | |
2120 | then write them back to the inferior process. | |
77382aee | 2121 | |
772cf8be MK |
2122 | FIXME: is that a really bad idea? Have to think about cases where |
2123 | writing one register might affect the value of others, etc. */ | |
c906108c | 2124 | |
c3f6f71d | 2125 | static void |
28439f5e PA |
2126 | procfs_store_registers (struct target_ops *ops, |
2127 | struct regcache *regcache, int regnum) | |
c3f6f71d | 2128 | { |
772cf8be MK |
2129 | gdb_gregset_t *gregs; |
2130 | procinfo *pi; | |
bcc0c096 SM |
2131 | ptid_t ptid = regcache_get_ptid (regcache); |
2132 | int pid = ptid_get_pid (ptid); | |
2133 | int tid = ptid_get_lwp (ptid); | |
ac7936df | 2134 | struct gdbarch *gdbarch = regcache->arch (); |
c3f6f71d | 2135 | |
2689673f | 2136 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
2137 | |
2138 | if (pi == NULL) | |
8a3fe4f8 | 2139 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
bcc0c096 | 2140 | target_pid_to_str (ptid)); |
c906108c | 2141 | |
772cf8be MK |
2142 | gregs = proc_get_gregs (pi); |
2143 | if (gregs == NULL) | |
c3f6f71d | 2144 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 2145 | |
56be3814 | 2146 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
2147 | if (!proc_set_gregs (pi)) |
2148 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 2149 | |
40a6adc1 | 2150 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 2151 | { |
772cf8be MK |
2152 | gdb_fpregset_t *fpregs; |
2153 | ||
40a6adc1 MD |
2154 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
2155 | || regnum == gdbarch_pc_regnum (gdbarch) | |
2156 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 2157 | return; /* Not a floating point register. */ |
60054393 | 2158 | |
772cf8be MK |
2159 | fpregs = proc_get_fpregs (pi); |
2160 | if (fpregs == NULL) | |
60054393 MS |
2161 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
2162 | ||
56be3814 | 2163 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
2164 | if (!proc_set_fpregs (pi)) |
2165 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
2166 | } | |
c3f6f71d | 2167 | } |
c906108c | 2168 | |
37de36c6 KB |
2169 | static int |
2170 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
2171 | { | |
37de36c6 KB |
2172 | if (scall == SYS_lwp_exit) |
2173 | return 1; | |
37de36c6 KB |
2174 | return 0; |
2175 | } | |
2176 | ||
2177 | static int | |
2178 | syscall_is_exit (procinfo *pi, int scall) | |
2179 | { | |
37de36c6 KB |
2180 | if (scall == SYS_exit) |
2181 | return 1; | |
37de36c6 KB |
2182 | return 0; |
2183 | } | |
2184 | ||
2185 | static int | |
2186 | syscall_is_exec (procinfo *pi, int scall) | |
2187 | { | |
2188 | #ifdef SYS_exec | |
2189 | if (scall == SYS_exec) | |
2190 | return 1; | |
2191 | #endif | |
37de36c6 KB |
2192 | if (scall == SYS_execve) |
2193 | return 1; | |
37de36c6 KB |
2194 | return 0; |
2195 | } | |
2196 | ||
2197 | static int | |
2198 | syscall_is_lwp_create (procinfo *pi, int scall) | |
2199 | { | |
37de36c6 KB |
2200 | if (scall == SYS_lwp_create) |
2201 | return 1; | |
37de36c6 KB |
2202 | return 0; |
2203 | } | |
2204 | ||
77382aee PA |
2205 | /* Retrieve the next stop event from the child process. If child has |
2206 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
2207 | (or possibly wait eventcodes) into gdb internal event codes. | |
2208 | Returns the id of process (and possibly thread) that incurred the | |
2209 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 2210 | |
39f77062 | 2211 | static ptid_t |
117de6a9 | 2212 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 2213 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 2214 | { |
0df8b418 | 2215 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 2216 | procinfo *pi; |
39f77062 KB |
2217 | int wstat; |
2218 | int temp_tid; | |
2219 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
2220 | int why, what, flags; |
2221 | int retry = 0; | |
c906108c | 2222 | |
c3f6f71d | 2223 | wait_again: |
c906108c | 2224 | |
c3f6f71d JM |
2225 | retry++; |
2226 | wstat = 0; | |
39f77062 | 2227 | retval = pid_to_ptid (-1); |
c906108c | 2228 | |
0df8b418 | 2229 | /* Find procinfo for main process. */ |
dfd4cc63 | 2230 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2231 | if (pi) |
c906108c | 2232 | { |
0df8b418 | 2233 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
2234 | pi->status_valid = 0; |
2235 | pi->gregs_valid = 0; | |
2236 | pi->fpregs_valid = 0; | |
2237 | ||
0df8b418 | 2238 | #if 0 /* just try this out... */ |
c3f6f71d JM |
2239 | flags = proc_flags (pi); |
2240 | why = proc_why (pi); | |
2241 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 2242 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
2243 | #endif |
2244 | /* If child is not stopped, wait for it to stop. */ | |
2245 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
2246 | !proc_wait_for_stop (pi)) | |
c906108c | 2247 | { |
0df8b418 | 2248 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 2249 | if (errno == ENOENT) |
c906108c | 2250 | { |
39f77062 KB |
2251 | int wait_retval; |
2252 | ||
0df8b418 MS |
2253 | /* /proc file not found; presumably child has terminated. */ |
2254 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 2255 | |
dfd4cc63 LM |
2256 | /* Wrong child? */ |
2257 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
2258 | error (_("procfs: couldn't stop " |
2259 | "process %d: wait returned %d."), | |
dfd4cc63 | 2260 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 2261 | /* FIXME: might I not just use waitpid? |
0df8b418 | 2262 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 2263 | retval = pid_to_ptid (wait_retval); |
c906108c | 2264 | } |
d1566ff5 FN |
2265 | else if (errno == EINTR) |
2266 | goto wait_again; | |
c3f6f71d | 2267 | else |
c906108c | 2268 | { |
0df8b418 | 2269 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 2270 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 2271 | } |
c3f6f71d JM |
2272 | } |
2273 | else | |
2274 | { | |
2275 | /* This long block is reached if either: | |
2276 | a) the child was already stopped, or | |
2277 | b) we successfully waited for the child with wait_for_stop. | |
2278 | This block will analyze the /proc status, and translate it | |
2279 | into a waitstatus for GDB. | |
2280 | ||
2281 | If we actually had to call wait because the /proc file | |
19958708 | 2282 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
2283 | because we already have a waitstatus. */ |
2284 | ||
2285 | flags = proc_flags (pi); | |
2286 | why = proc_why (pi); | |
2287 | what = proc_what (pi); | |
2288 | ||
c3f6f71d | 2289 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 2290 | { |
c3f6f71d JM |
2291 | /* If it's running async (for single_thread control), |
2292 | set it back to normal again. */ | |
2293 | if (flags & PR_ASYNC) | |
2294 | if (!proc_unset_async (pi)) | |
2295 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
c3f6f71d JM |
2296 | |
2297 | if (info_verbose) | |
2298 | proc_prettyprint_why (why, what, 1); | |
2299 | ||
2300 | /* The 'pid' we will return to GDB is composed of | |
2301 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 2302 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
2303 | |
2304 | switch (why) { | |
2305 | case PR_SIGNALLED: | |
2306 | wstat = (what << 8) | 0177; | |
2307 | break; | |
2308 | case PR_SYSENTRY: | |
37de36c6 | 2309 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 2310 | { |
17faa917 DJ |
2311 | if (print_thread_events) |
2312 | printf_unfiltered (_("[%s exited]\n"), | |
2313 | target_pid_to_str (retval)); | |
37de36c6 KB |
2314 | delete_thread (retval); |
2315 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2316 | return retval; | |
2317 | } | |
2318 | else if (syscall_is_exit (pi, what)) | |
2319 | { | |
181e7f93 PA |
2320 | struct inferior *inf; |
2321 | ||
0df8b418 | 2322 | /* Handle SYS_exit call only. */ |
37de36c6 | 2323 | /* Stopped at entry to SYS_exit. |
19958708 | 2324 | Make it runnable, resume it, then use |
37de36c6 | 2325 | the wait system call to get its exit code. |
19958708 | 2326 | Proc_run_process always clears the current |
37de36c6 KB |
2327 | fault and signal. |
2328 | Then return its exit status. */ | |
2329 | pi->status_valid = 0; | |
2330 | wstat = 0; | |
19958708 | 2331 | /* FIXME: what we should do is return |
37de36c6 KB |
2332 | TARGET_WAITKIND_SPURIOUS. */ |
2333 | if (!proc_run_process (pi, 0, 0)) | |
2334 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
2335 | |
2336 | inf = find_inferior_pid (pi->pid); | |
2337 | if (inf->attach_flag) | |
c3f6f71d | 2338 | { |
19958708 | 2339 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
2340 | return a "success" exit code. Bogus: what if |
2341 | it returns something else? */ | |
2342 | wstat = 0; | |
39f77062 | 2343 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
2344 | } |
2345 | else | |
2346 | { | |
2347 | int temp = wait (&wstat); | |
2348 | ||
2349 | /* FIXME: shouldn't I make sure I get the right | |
2350 | event from the right process? If (for | |
2351 | instance) I have killed an earlier inferior | |
2352 | process but failed to clean up after it | |
2353 | somehow, I could get its termination event | |
2354 | here. */ | |
2355 | ||
0df8b418 MS |
2356 | /* If wait returns -1, that's what we return |
2357 | to GDB. */ | |
37de36c6 | 2358 | if (temp < 0) |
39f77062 | 2359 | retval = pid_to_ptid (temp); |
c3f6f71d | 2360 | } |
c3f6f71d | 2361 | } |
37de36c6 KB |
2362 | else |
2363 | { | |
a3f17187 | 2364 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
2365 | proc_prettyprint_syscall (proc_what (pi), 0); |
2366 | printf_filtered ("\n"); | |
44122162 RO |
2367 | |
2368 | long i, nsysargs, *sysargs; | |
2369 | ||
2370 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2371 | (sysargs = proc_sysargs (pi)) != NULL) | |
2372 | { | |
2373 | printf_filtered (_("%ld syscall arguments:\n"), | |
2374 | nsysargs); | |
2375 | for (i = 0; i < nsysargs; i++) | |
2376 | printf_filtered ("#%ld: 0x%08lx\n", | |
2377 | i, sysargs[i]); | |
2378 | } | |
2379 | ||
37de36c6 KB |
2380 | if (status) |
2381 | { | |
0df8b418 MS |
2382 | /* How to exit gracefully, returning "unknown |
2383 | event". */ | |
37de36c6 | 2384 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2385 | return inferior_ptid; |
37de36c6 KB |
2386 | } |
2387 | else | |
2388 | { | |
2389 | /* How to keep going without returning to wfi: */ | |
049a8570 | 2390 | target_continue_no_signal (ptid); |
37de36c6 KB |
2391 | goto wait_again; |
2392 | } | |
2393 | } | |
2394 | break; | |
2395 | case PR_SYSEXIT: | |
2396 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 2397 | { |
37de36c6 KB |
2398 | /* Hopefully this is our own "fork-child" execing |
2399 | the real child. Hoax this event into a trap, and | |
2400 | GDB will see the child about to execute its start | |
0df8b418 | 2401 | address. */ |
37de36c6 KB |
2402 | wstat = (SIGTRAP << 8) | 0177; |
2403 | } | |
2404 | else if (syscall_is_lwp_create (pi, what)) | |
2405 | { | |
77382aee PA |
2406 | /* This syscall is somewhat like fork/exec. We |
2407 | will get the event twice: once for the parent | |
2408 | LWP, and once for the child. We should already | |
2409 | know about the parent LWP, but the child will | |
2410 | be new to us. So, whenever we get this event, | |
2411 | if it represents a new thread, simply add the | |
2412 | thread to the list. */ | |
c3f6f71d | 2413 | |
37de36c6 | 2414 | /* If not in procinfo list, add it. */ |
39f77062 KB |
2415 | temp_tid = proc_get_current_thread (pi); |
2416 | if (!find_procinfo (pi->pid, temp_tid)) | |
2417 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 2418 | |
dfd4cc63 | 2419 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 2420 | /* If not in GDB's thread list, add it. */ |
39f77062 | 2421 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
2422 | add_thread (temp_ptid); |
2423 | ||
0df8b418 | 2424 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 2425 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2426 | return inferior_ptid; |
37de36c6 KB |
2427 | } |
2428 | else if (syscall_is_lwp_exit (pi, what)) | |
2429 | { | |
17faa917 DJ |
2430 | if (print_thread_events) |
2431 | printf_unfiltered (_("[%s exited]\n"), | |
2432 | target_pid_to_str (retval)); | |
37de36c6 KB |
2433 | delete_thread (retval); |
2434 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
2435 | return retval; | |
c3f6f71d | 2436 | } |
37de36c6 KB |
2437 | else if (0) |
2438 | { | |
2439 | /* FIXME: Do we need to handle SYS_sproc, | |
2440 | SYS_fork, or SYS_vfork here? The old procfs | |
2441 | seemed to use this event to handle threads on | |
2442 | older (non-LWP) systems, where I'm assuming | |
19958708 | 2443 | that threads were actually separate processes. |
37de36c6 KB |
2444 | Irix, maybe? Anyway, low priority for now. */ |
2445 | } | |
2446 | else | |
2447 | { | |
a3f17187 | 2448 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
2449 | proc_prettyprint_syscall (proc_what (pi), 0); |
2450 | printf_filtered ("\n"); | |
44122162 RO |
2451 | |
2452 | long i, nsysargs, *sysargs; | |
2453 | ||
2454 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
2455 | (sysargs = proc_sysargs (pi)) != NULL) | |
2456 | { | |
2457 | printf_filtered (_("%ld syscall arguments:\n"), | |
2458 | nsysargs); | |
2459 | for (i = 0; i < nsysargs; i++) | |
2460 | printf_filtered ("#%ld: 0x%08lx\n", | |
2461 | i, sysargs[i]); | |
2462 | } | |
2463 | ||
37de36c6 | 2464 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 2465 | return inferior_ptid; |
37de36c6 | 2466 | } |
c3f6f71d JM |
2467 | break; |
2468 | case PR_REQUESTED: | |
2469 | #if 0 /* FIXME */ | |
2470 | wstat = (SIGSTOP << 8) | 0177; | |
2471 | break; | |
2472 | #else | |
2473 | if (retry < 5) | |
2474 | { | |
a3f17187 | 2475 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
2476 | pi->status_valid = 0; |
2477 | goto wait_again; | |
2478 | } | |
2479 | else | |
2480 | { | |
2481 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
2482 | temp_tid = proc_get_current_thread (pi); |
2483 | if (!find_procinfo (pi->pid, temp_tid)) | |
2484 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
2485 | |
2486 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 2487 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 2488 | if (!in_thread_list (temp_ptid)) |
93815fbf | 2489 | add_thread (temp_ptid); |
c3f6f71d JM |
2490 | |
2491 | status->kind = TARGET_WAITKIND_STOPPED; | |
b196bc4c | 2492 | status->value.sig = GDB_SIGNAL_0; |
c3f6f71d JM |
2493 | return retval; |
2494 | } | |
2495 | #endif | |
2496 | case PR_JOBCONTROL: | |
2497 | wstat = (what << 8) | 0177; | |
2498 | break; | |
2499 | case PR_FAULTED: | |
7af6341f | 2500 | switch (what) { |
c3f6f71d JM |
2501 | case FLTWATCH: |
2502 | wstat = (SIGTRAP << 8) | 0177; | |
2503 | break; | |
0df8b418 | 2504 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 2505 | case FLTPRIV: |
c3f6f71d | 2506 | case FLTILL: |
c3f6f71d JM |
2507 | wstat = (SIGILL << 8) | 0177; |
2508 | break; | |
2509 | case FLTBPT: | |
c3f6f71d | 2510 | case FLTTRACE: |
c3f6f71d JM |
2511 | wstat = (SIGTRAP << 8) | 0177; |
2512 | break; | |
2513 | case FLTSTACK: | |
2514 | case FLTACCESS: | |
c3f6f71d | 2515 | case FLTBOUNDS: |
c3f6f71d JM |
2516 | wstat = (SIGSEGV << 8) | 0177; |
2517 | break; | |
2518 | case FLTIOVF: | |
2519 | case FLTIZDIV: | |
c3f6f71d | 2520 | case FLTFPE: |
c3f6f71d JM |
2521 | wstat = (SIGFPE << 8) | 0177; |
2522 | break; | |
3e43a32a | 2523 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
2524 | default: /* FIXME: use si_signo if possible for |
2525 | fault. */ | |
39f77062 | 2526 | retval = pid_to_ptid (-1); |
c3f6f71d | 2527 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 2528 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2529 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2530 | error (_("... giving up...")); |
c3f6f71d JM |
2531 | break; |
2532 | } | |
2533 | break; /* case PR_FAULTED: */ | |
2534 | default: /* switch (why) unmatched */ | |
2535 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 2536 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 2537 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 2538 | error (_("... giving up...")); |
c3f6f71d JM |
2539 | break; |
2540 | } | |
77382aee PA |
2541 | /* Got this far without error: If retval isn't in the |
2542 | threads database, add it. */ | |
dfd4cc63 | 2543 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 2544 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 2545 | !in_thread_list (retval)) |
c906108c | 2546 | { |
77382aee PA |
2547 | /* We have a new thread. We need to add it both to |
2548 | GDB's list and to our own. If we don't create a | |
2549 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 2550 | add_thread (retval); |
dfd4cc63 LM |
2551 | if (find_procinfo (ptid_get_pid (retval), |
2552 | ptid_get_lwp (retval)) == NULL) | |
2553 | create_procinfo (ptid_get_pid (retval), | |
2554 | ptid_get_lwp (retval)); | |
c906108c | 2555 | } |
c906108c | 2556 | } |
0df8b418 | 2557 | else /* Flags do not indicate STOPPED. */ |
c906108c | 2558 | { |
0df8b418 | 2559 | /* surely this can't happen... */ |
c3f6f71d JM |
2560 | printf_filtered ("procfs:%d -- process not stopped.\n", |
2561 | __LINE__); | |
2562 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 2563 | error (_("procfs: ...giving up...")); |
c906108c | 2564 | } |
c906108c | 2565 | } |
c906108c | 2566 | |
c3f6f71d JM |
2567 | if (status) |
2568 | store_waitstatus (status, wstat); | |
c906108c SS |
2569 | } |
2570 | ||
c3f6f71d JM |
2571 | return retval; |
2572 | } | |
c906108c | 2573 | |
4e73f23d RM |
2574 | /* Perform a partial transfer to/from the specified object. For |
2575 | memory transfers, fall back to the old memory xfer functions. */ | |
2576 | ||
9b409511 | 2577 | static enum target_xfer_status |
4e73f23d | 2578 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
0b62613e | 2579 | const char *annex, gdb_byte *readbuf, |
9b409511 YQ |
2580 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
2581 | ULONGEST *xfered_len) | |
4e73f23d RM |
2582 | { |
2583 | switch (object) | |
2584 | { | |
2585 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 2586 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d | 2587 | |
4e73f23d | 2588 | case TARGET_OBJECT_AUXV: |
9f2982ff | 2589 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
9b409511 | 2590 | offset, len, xfered_len); |
4e73f23d RM |
2591 | |
2592 | default: | |
e75fdfca TT |
2593 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
2594 | readbuf, writebuf, offset, len, | |
2595 | xfered_len); | |
4e73f23d RM |
2596 | } |
2597 | } | |
2598 | ||
e96027e0 PA |
2599 | /* Helper for procfs_xfer_partial that handles memory transfers. |
2600 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 2601 | |
e96027e0 PA |
2602 | static enum target_xfer_status |
2603 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2604 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
2605 | { |
2606 | procinfo *pi; | |
e96027e0 | 2607 | int nbytes; |
c906108c | 2608 | |
0df8b418 | 2609 | /* Find procinfo for main process. */ |
dfd4cc63 | 2610 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2611 | if (pi->as_fd == 0 && |
2612 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 2613 | { |
c3f6f71d | 2614 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 2615 | return TARGET_XFER_E_IO; |
c906108c | 2616 | } |
c906108c | 2617 | |
e96027e0 PA |
2618 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
2619 | return TARGET_XFER_E_IO; | |
2620 | ||
2621 | if (writebuf != NULL) | |
c906108c | 2622 | { |
e96027e0 PA |
2623 | PROCFS_NOTE ("write memory:\n"); |
2624 | nbytes = write (pi->as_fd, writebuf, len); | |
2625 | } | |
2626 | else | |
2627 | { | |
2628 | PROCFS_NOTE ("read memory:\n"); | |
2629 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 2630 | } |
e96027e0 PA |
2631 | if (nbytes <= 0) |
2632 | return TARGET_XFER_E_IO; | |
2633 | *xfered_len = nbytes; | |
2634 | return TARGET_XFER_OK; | |
c906108c SS |
2635 | } |
2636 | ||
77382aee PA |
2637 | /* Called by target_resume before making child runnable. Mark cached |
2638 | registers and status's invalid. If there are "dirty" caches that | |
2639 | need to be written back to the child process, do that. | |
c906108c | 2640 | |
77382aee PA |
2641 | File descriptors are also cached. As they are a limited resource, |
2642 | we cannot hold onto them indefinitely. However, as they are | |
2643 | expensive to open, we don't want to throw them away | |
2644 | indescriminately either. As a compromise, we will keep the file | |
2645 | descriptors for the parent process, but discard any file | |
2646 | descriptors we may have accumulated for the threads. | |
2647 | ||
2648 | As this function is called by iterate_over_threads, it always | |
2649 | returns zero (so that iterate_over_threads will keep | |
2650 | iterating). */ | |
c3f6f71d JM |
2651 | |
2652 | static int | |
fba45db2 | 2653 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 2654 | { |
77382aee PA |
2655 | /* About to run the child; invalidate caches and do any other |
2656 | cleanup. */ | |
c906108c | 2657 | |
c3f6f71d JM |
2658 | #if 0 |
2659 | if (pi->gregs_dirty) | |
2660 | if (parent == NULL || | |
2661 | proc_get_current_thread (parent) != pi->tid) | |
2662 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
2663 | proc_warn (pi, "target_resume, set_gregs", | |
2664 | __LINE__); | |
f5656ead | 2665 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
2666 | if (pi->fpregs_dirty) |
2667 | if (parent == NULL || | |
2668 | proc_get_current_thread (parent) != pi->tid) | |
2669 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 2670 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 2671 | __LINE__); |
c906108c | 2672 | #endif |
c906108c | 2673 | |
c3f6f71d | 2674 | if (parent != NULL) |
c906108c | 2675 | { |
c3f6f71d | 2676 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 2677 | Close any file descriptors that it might have open. |
c3f6f71d JM |
2678 | We don't do this to the master (parent) procinfo. */ |
2679 | ||
2680 | close_procinfo_files (pi); | |
c906108c | 2681 | } |
c3f6f71d JM |
2682 | pi->gregs_valid = 0; |
2683 | pi->fpregs_valid = 0; | |
2684 | #if 0 | |
2685 | pi->gregs_dirty = 0; | |
2686 | pi->fpregs_dirty = 0; | |
c906108c | 2687 | #endif |
c3f6f71d JM |
2688 | pi->status_valid = 0; |
2689 | pi->threads_valid = 0; | |
c906108c | 2690 | |
c3f6f71d | 2691 | return 0; |
c906108c SS |
2692 | } |
2693 | ||
0fda6bd2 | 2694 | #if 0 |
77382aee PA |
2695 | /* A callback function for iterate_over_threads. Find the |
2696 | asynchronous signal thread, and make it runnable. See if that | |
2697 | helps matters any. */ | |
c906108c | 2698 | |
c3f6f71d | 2699 | static int |
fba45db2 | 2700 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 2701 | { |
c3f6f71d JM |
2702 | #ifdef PR_ASLWP |
2703 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 2704 | { |
c3f6f71d JM |
2705 | if (!proc_run_process (pi, 0, -1)) |
2706 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
2707 | return 1; | |
c906108c | 2708 | } |
c906108c | 2709 | #endif |
c3f6f71d | 2710 | return 0; |
c906108c | 2711 | } |
0fda6bd2 | 2712 | #endif |
c906108c | 2713 | |
77382aee PA |
2714 | /* Make the child process runnable. Normally we will then call |
2715 | procfs_wait and wait for it to stop again (unless gdb is async). | |
2716 | ||
2717 | If STEP is true, then arrange for the child to stop again after | |
2718 | executing a single instruction. If SIGNO is zero, then cancel any | |
2719 | pending signal; if non-zero, then arrange for the indicated signal | |
2720 | to be delivered to the child when it runs. If PID is -1, then | |
2721 | allow any child thread to run; if non-zero, then allow only the | |
2722 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
2723 | |
2724 | static void | |
28439f5e | 2725 | procfs_resume (struct target_ops *ops, |
2ea28649 | 2726 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 2727 | { |
c3f6f71d JM |
2728 | procinfo *pi, *thread; |
2729 | int native_signo; | |
2730 | ||
19958708 | 2731 | /* 2.1: |
c3f6f71d | 2732 | prrun.prflags |= PRSVADDR; |
19958708 | 2733 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 2734 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 2735 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
2736 | prrun.prflags |= PRCFAULT; clear current fault. |
2737 | ||
2738 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 2739 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
2740 | PRSVADDR is unnecessary. |
2741 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
2742 | This basically leaves PRSTEP and PRCSIG. | |
2743 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
2744 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 2745 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 2746 | |
0df8b418 | 2747 | /* Find procinfo for main process. */ |
dfd4cc63 | 2748 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 2749 | |
77382aee | 2750 | /* First cut: ignore pid argument. */ |
c3f6f71d | 2751 | errno = 0; |
c906108c | 2752 | |
c3f6f71d JM |
2753 | /* Convert signal to host numbering. */ |
2754 | if (signo == 0 || | |
a493e3e2 | 2755 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
2756 | native_signo = 0; |
2757 | else | |
2ea28649 | 2758 | native_signo = gdb_signal_to_host (signo); |
c906108c | 2759 | |
c3f6f71d | 2760 | pi->ignore_next_sigstop = 0; |
c906108c | 2761 | |
77382aee PA |
2762 | /* Running the process voids all cached registers and status. */ |
2763 | /* Void the threads' caches first. */ | |
19958708 | 2764 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
2765 | /* Void the process procinfo's caches. */ |
2766 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 2767 | |
dfd4cc63 | 2768 | if (ptid_get_pid (ptid) != -1) |
c906108c | 2769 | { |
77382aee PA |
2770 | /* Resume a specific thread, presumably suppressing the |
2771 | others. */ | |
dfd4cc63 | 2772 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 2773 | if (thread != NULL) |
c906108c | 2774 | { |
c3f6f71d JM |
2775 | if (thread->tid != 0) |
2776 | { | |
77382aee PA |
2777 | /* We're to resume a specific thread, and not the |
2778 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
2779 | if (!proc_set_async (pi)) |
2780 | proc_error (pi, "target_resume, set_async", __LINE__); | |
c3f6f71d | 2781 | #if 0 |
19958708 | 2782 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
2783 | make_signal_thread_runnable, |
2784 | NULL); | |
2785 | #endif | |
0df8b418 MS |
2786 | pi = thread; /* Substitute the thread's procinfo |
2787 | for run. */ | |
c3f6f71d | 2788 | } |
c906108c SS |
2789 | } |
2790 | } | |
c906108c | 2791 | |
c3f6f71d | 2792 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 2793 | { |
c3f6f71d | 2794 | if (errno == EBUSY) |
77382aee PA |
2795 | warning (_("resume: target already running. " |
2796 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
2797 | else |
2798 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 2799 | } |
c3f6f71d | 2800 | } |
c906108c | 2801 | |
77382aee | 2802 | /* Set up to trace signals in the child process. */ |
c906108c | 2803 | |
c3f6f71d | 2804 | static void |
94bedb42 TT |
2805 | procfs_pass_signals (struct target_ops *self, |
2806 | int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 2807 | { |
44122162 | 2808 | sigset_t signals; |
dfd4cc63 | 2809 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 2810 | int signo; |
c906108c | 2811 | |
2455069d UW |
2812 | prfillset (&signals); |
2813 | ||
2814 | for (signo = 0; signo < NSIG; signo++) | |
2815 | { | |
2ea28649 | 2816 | int target_signo = gdb_signal_from_host (signo); |
2455069d | 2817 | if (target_signo < numsigs && pass_signals[target_signo]) |
44122162 | 2818 | prdelset (&signals, signo); |
2455069d UW |
2819 | } |
2820 | ||
2821 | if (!proc_set_traced_signals (pi, &signals)) | |
2822 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 2823 | } |
c906108c | 2824 | |
77382aee | 2825 | /* Print status information about the child process. */ |
c906108c | 2826 | |
c3f6f71d | 2827 | static void |
fba45db2 | 2828 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 2829 | { |
181e7f93 | 2830 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 2831 | |
a3f17187 | 2832 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 2833 | inf->attach_flag? "attached": "child", |
39f77062 | 2834 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 2835 | } |
c906108c | 2836 | |
77382aee PA |
2837 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
2838 | should only be applied to the real process, not to an LWP, because | |
2839 | of the check for parent-process. If we need this to work for an | |
2840 | LWP, it needs some more logic. */ | |
c906108c | 2841 | |
c3f6f71d | 2842 | static void |
fba45db2 | 2843 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
2844 | { |
2845 | int parent_pid; | |
c906108c | 2846 | |
c3f6f71d | 2847 | parent_pid = proc_parent_pid (pi); |
c3f6f71d | 2848 | if (!proc_kill (pi, SIGKILL)) |
103b3ef5 | 2849 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d | 2850 | destroy_procinfo (pi); |
c906108c | 2851 | |
c3f6f71d JM |
2852 | /* If pi is GDB's child, wait for it to die. */ |
2853 | if (parent_pid == getpid ()) | |
19958708 | 2854 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
2855 | Should we check the returned event? */ |
2856 | { | |
0d06e24b | 2857 | #if 0 |
c3f6f71d | 2858 | int status, ret; |
c906108c | 2859 | |
c3f6f71d JM |
2860 | ret = waitpid (pi->pid, &status, 0); |
2861 | #else | |
2862 | wait (NULL); | |
2863 | #endif | |
2864 | } | |
2865 | } | |
c906108c | 2866 | |
77382aee PA |
2867 | /* We're done debugging it, and we want it to go away. Then we want |
2868 | GDB to forget all about it. */ | |
c906108c | 2869 | |
19958708 | 2870 | static void |
7d85a9c0 | 2871 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 2872 | { |
39f77062 | 2873 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 2874 | { |
0df8b418 | 2875 | /* Find procinfo for main process. */ |
dfd4cc63 | 2876 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 2877 | |
c3f6f71d JM |
2878 | if (pi) |
2879 | unconditionally_kill_inferior (pi); | |
bc1e6c81 | 2880 | target_mourn_inferior (inferior_ptid); |
c906108c | 2881 | } |
c3f6f71d JM |
2882 | } |
2883 | ||
77382aee | 2884 | /* Forget we ever debugged this thing! */ |
c906108c | 2885 | |
19958708 | 2886 | static void |
136d6dae | 2887 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
2888 | { |
2889 | procinfo *pi; | |
c906108c | 2890 | |
39f77062 | 2891 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 2892 | { |
0df8b418 | 2893 | /* Find procinfo for main process. */ |
dfd4cc63 | 2894 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
2895 | if (pi) |
2896 | destroy_procinfo (pi); | |
c906108c | 2897 | } |
6a3cb8e8 PA |
2898 | |
2899 | generic_mourn_inferior (); | |
8181d85f | 2900 | |
6a3cb8e8 | 2901 | inf_child_maybe_unpush_target (ops); |
c3f6f71d | 2902 | } |
c906108c | 2903 | |
77382aee PA |
2904 | /* When GDB forks to create a runnable inferior process, this function |
2905 | is called on the parent side of the fork. It's job is to do | |
2906 | whatever is necessary to make the child ready to be debugged, and | |
2907 | then wait for the child to synchronize. */ | |
c906108c | 2908 | |
19958708 | 2909 | static void |
28439f5e | 2910 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
2911 | { |
2912 | procinfo *pi; | |
44122162 | 2913 | sigset_t signals; |
c3f6f71d | 2914 | int fail; |
2689673f | 2915 | int lwpid; |
c906108c | 2916 | |
c3f6f71d JM |
2917 | /* This routine called on the parent side (GDB side) |
2918 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
2919 | if (!target_is_pushed (ops)) |
2920 | push_target (ops); | |
c906108c | 2921 | |
c3f6f71d | 2922 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 2923 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
2924 | |
2925 | if (!open_procinfo_files (pi, FD_CTL)) | |
2926 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
2927 | ||
2928 | /* | |
2929 | xmalloc // done | |
2930 | open_procinfo_files // done | |
2931 | link list // done | |
2932 | prfillset (trace) | |
2933 | procfs_notice_signals | |
2934 | prfillset (fault) | |
2935 | prdelset (FLTPAGE) | |
2936 | PIOCWSTOP | |
2937 | PIOCSFAULT | |
2938 | */ | |
2939 | ||
77382aee | 2940 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
2941 | if (!(proc_flags (pi) & PR_STOPPED) && |
2942 | !(proc_wait_for_stop (pi))) | |
2943 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
2944 | ||
2945 | /* Save some of the /proc state to be restored if we detach. */ | |
2946 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 2947 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
2948 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
2949 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
2950 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
2951 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
2952 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
2953 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 2954 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 2955 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 2956 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
2957 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
2958 | ||
c3f6f71d JM |
2959 | if ((fail = procfs_debug_inferior (pi)) != 0) |
2960 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
2961 | ||
0d06e24b JM |
2962 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
2963 | and possibly even turning ON kill-on-last-close at this point. But | |
2964 | I can't make that change without careful testing which I don't have | |
2965 | time to do right now... */ | |
c3f6f71d JM |
2966 | /* Turn on run-on-last-close flag so that the child |
2967 | will die if GDB goes away for some reason. */ | |
2968 | if (!proc_set_run_on_last_close (pi)) | |
2969 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
2970 | ||
2689673f PA |
2971 | /* We now have have access to the lwpid of the main thread/lwp. */ |
2972 | lwpid = proc_get_current_thread (pi); | |
2973 | ||
2974 | /* Create a procinfo for the main lwp. */ | |
2975 | create_procinfo (pid, lwpid); | |
2976 | ||
2977 | /* We already have a main thread registered in the thread table at | |
2978 | this point, but it didn't have any lwp info yet. Notify the core | |
2979 | about it. This changes inferior_ptid as well. */ | |
2980 | thread_change_ptid (pid_to_ptid (pid), | |
793e1c06 | 2981 | ptid_build (pid, lwpid, 0)); |
c906108c | 2982 | |
2090129c | 2983 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c3f6f71d | 2984 | } |
c906108c | 2985 | |
77382aee PA |
2986 | /* When GDB forks to create a new process, this function is called on |
2987 | the child side of the fork before GDB exec's the user program. Its | |
2988 | job is to make the child minimally debuggable, so that the parent | |
2989 | GDB process can connect to the child and take over. This function | |
2990 | should do only the minimum to make that possible, and to | |
2991 | synchronize with the parent process. The parent process should | |
2992 | take care of the details. */ | |
c3f6f71d JM |
2993 | |
2994 | static void | |
fba45db2 | 2995 | procfs_set_exec_trap (void) |
c3f6f71d JM |
2996 | { |
2997 | /* This routine called on the child side (inferior side) | |
2998 | after GDB forks the inferior. It must use only local variables, | |
2999 | because it may be sharing data space with its parent. */ | |
c906108c | 3000 | |
c3f6f71d | 3001 | procinfo *pi; |
37de36c6 | 3002 | sysset_t *exitset; |
c906108c | 3003 | |
c3f6f71d | 3004 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 3005 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 3006 | |
c3f6f71d JM |
3007 | if (open_procinfo_files (pi, FD_CTL) == 0) |
3008 | { | |
3009 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
3010 | gdb_flush (gdb_stderr); | |
77382aee PA |
3011 | /* No need to call "dead_procinfo", because we're going to |
3012 | exit. */ | |
c3f6f71d JM |
3013 | _exit (127); |
3014 | } | |
c906108c | 3015 | |
44122162 | 3016 | /* Method for tracing exec syscalls. */ |
c3f6f71d JM |
3017 | /* GW: Rationale... |
3018 | Not all systems with /proc have all the exec* syscalls with the same | |
3019 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 3020 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 3021 | |
37de36c6 | 3022 | exitset = sysset_t_alloc (pi); |
44122162 | 3023 | premptyset (exitset); |
c3f6f71d | 3024 | #ifdef SYS_exec |
44122162 | 3025 | praddset (exitset, SYS_exec); |
c906108c | 3026 | #endif |
44122162 | 3027 | praddset (exitset, SYS_execve); |
37de36c6 KB |
3028 | |
3029 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 3030 | { |
c3f6f71d JM |
3031 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
3032 | gdb_flush (gdb_stderr); | |
3033 | _exit (127); | |
c906108c | 3034 | } |
c3f6f71d | 3035 | |
0df8b418 | 3036 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
3037 | /* Turn off inherit on fork flag so that all grand-children |
3038 | of gdb start with tracing flags cleared. */ | |
3039 | if (!proc_unset_inherit_on_fork (pi)) | |
3040 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
3041 | ||
3042 | /* Turn off run on last close flag, so that the child process | |
3043 | cannot run away just because we close our handle on it. | |
3044 | We want it to wait for the parent to attach. */ | |
3045 | if (!proc_unset_run_on_last_close (pi)) | |
3046 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
3047 | ||
19958708 | 3048 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 3049 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 3050 | /*destroy_procinfo (pi);*/ |
c906108c | 3051 | } |
c906108c | 3052 | |
77382aee PA |
3053 | /* This function is called BEFORE gdb forks the inferior process. Its |
3054 | only real responsibility is to set things up for the fork, and tell | |
3055 | GDB which two functions to call after the fork (one for the parent, | |
3056 | and one for the child). | |
3057 | ||
3058 | This function does a complicated search for a unix shell program, | |
3059 | which it then uses to parse arguments and environment variables to | |
3060 | be sent to the child. I wonder whether this code could not be | |
3061 | abstracted out and shared with other unix targets such as | |
3062 | inf-ptrace? */ | |
c906108c SS |
3063 | |
3064 | static void | |
7c5ded6a SDJ |
3065 | procfs_create_inferior (struct target_ops *ops, const char *exec_file, |
3066 | const std::string &allargs, char **env, int from_tty) | |
c906108c SS |
3067 | { |
3068 | char *shell_file = getenv ("SHELL"); | |
3069 | char *tryname; | |
28439f5e PA |
3070 | int pid; |
3071 | ||
c906108c SS |
3072 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
3073 | { | |
3074 | ||
3075 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
3076 | just do this the normal way (via execlp, which operates by |
3077 | attempting an exec for each element of the PATH until it | |
3078 | finds one which succeeds), then there will be an exec for | |
3079 | each failed attempt, each of which will cause a PR_SYSEXIT | |
3080 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
3081 | for these failed execs with the ones for successful execs | |
3082 | (whether the exec has succeeded is stored at that time in the | |
3083 | carry bit or some such architecture-specific and | |
3084 | non-ABI-specified place). | |
3085 | ||
3086 | So I can't think of anything better than to search the PATH | |
3087 | now. This has several disadvantages: (1) There is a race | |
3088 | condition; if we find a file now and it is deleted before we | |
3089 | exec it, we lose, even if the deletion leaves a valid file | |
3090 | further down in the PATH, (2) there is no way to know exactly | |
3091 | what an executable (in the sense of "capable of being | |
3092 | exec'd") file is. Using access() loses because it may lose | |
3093 | if the caller is the superuser; failing to use it loses if | |
3094 | there are ACLs or some such. */ | |
c906108c | 3095 | |
995816ba PA |
3096 | const char *p; |
3097 | const char *p1; | |
c906108c | 3098 | /* FIXME-maybe: might want "set path" command so user can change what |
c3f6f71d | 3099 | path is used from within GDB. */ |
995816ba | 3100 | const char *path = getenv ("PATH"); |
c906108c SS |
3101 | int len; |
3102 | struct stat statbuf; | |
3103 | ||
3104 | if (path == NULL) | |
3105 | path = "/bin:/usr/bin"; | |
3106 | ||
b196bc4c | 3107 | tryname = (char *) alloca (strlen (path) + strlen (shell_file) + 2); |
c3f6f71d | 3108 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
3109 | { |
3110 | p1 = strchr (p, ':'); | |
3111 | if (p1 != NULL) | |
3112 | len = p1 - p; | |
3113 | else | |
3114 | len = strlen (p); | |
3115 | strncpy (tryname, p, len); | |
3116 | tryname[len] = '\0'; | |
3117 | strcat (tryname, "/"); | |
3118 | strcat (tryname, shell_file); | |
3119 | if (access (tryname, X_OK) < 0) | |
3120 | continue; | |
3121 | if (stat (tryname, &statbuf) < 0) | |
3122 | continue; | |
3123 | if (!S_ISREG (statbuf.st_mode)) | |
3124 | /* We certainly need to reject directories. I'm not quite | |
3125 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
3126 | that people want to exec() these things. */ | |
3127 | continue; | |
3128 | break; | |
3129 | } | |
3130 | if (p == NULL) | |
3131 | /* Not found. This must be an error rather than merely passing | |
3132 | the file to execlp(), because execlp() would try all the | |
3133 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 3134 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 3135 | __LINE__, shell_file); |
c906108c SS |
3136 | |
3137 | shell_file = tryname; | |
3138 | } | |
3139 | ||
28439f5e | 3140 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 3141 | NULL, NULL, shell_file, NULL); |
28439f5e | 3142 | |
2090129c SDJ |
3143 | /* We have something that executes now. We'll be running through |
3144 | the shell at this point (if startup-with-shell is true), but the | |
3145 | pid shouldn't change. */ | |
3146 | add_thread_silent (pid_to_ptid (pid)); | |
3147 | ||
28439f5e | 3148 | procfs_init_inferior (ops, pid); |
27087a3d JB |
3149 | } |
3150 | ||
3151 | /* An observer for the "inferior_created" event. */ | |
c906108c | 3152 | |
27087a3d JB |
3153 | static void |
3154 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
3155 | { | |
c906108c SS |
3156 | } |
3157 | ||
e8032dde | 3158 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 3159 | |
c3f6f71d | 3160 | static int |
fba45db2 | 3161 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 3162 | { |
dfd4cc63 | 3163 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 3164 | |
2689673f | 3165 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 3166 | add_thread (gdb_threadid); |
c906108c | 3167 | |
c3f6f71d JM |
3168 | return 0; |
3169 | } | |
3170 | ||
77382aee PA |
3171 | /* Query all the threads that the target knows about, and give them |
3172 | back to GDB to add to its list. */ | |
c3f6f71d | 3173 | |
d3581e61 | 3174 | static void |
e8032dde | 3175 | procfs_update_thread_list (struct target_ops *ops) |
c3f6f71d JM |
3176 | { |
3177 | procinfo *pi; | |
3178 | ||
e8032dde PA |
3179 | prune_threads (); |
3180 | ||
0df8b418 | 3181 | /* Find procinfo for main process. */ |
dfd4cc63 | 3182 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3183 | proc_update_threads (pi); |
3184 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
3185 | } |
3186 | ||
77382aee PA |
3187 | /* Return true if the thread is still 'alive'. This guy doesn't |
3188 | really seem to be doing his job. Got to investigate how to tell | |
3189 | when a thread is really gone. */ | |
c906108c | 3190 | |
c906108c | 3191 | static int |
28439f5e | 3192 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 3193 | { |
c3f6f71d JM |
3194 | int proc, thread; |
3195 | procinfo *pi; | |
c906108c | 3196 | |
dfd4cc63 LM |
3197 | proc = ptid_get_pid (ptid); |
3198 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 3199 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
3200 | if ((pi = find_procinfo (proc, thread)) == NULL) |
3201 | return 0; | |
3202 | ||
3203 | /* If I can't get its status, it ain't alive! | |
3204 | What's more, I need to forget about it! */ | |
3205 | if (!proc_get_status (pi)) | |
3206 | { | |
3207 | destroy_procinfo (pi); | |
3208 | return 0; | |
3209 | } | |
77382aee PA |
3210 | /* I couldn't have got its status if it weren't alive, so it's |
3211 | alive. */ | |
c3f6f71d | 3212 | return 1; |
c906108c | 3213 | } |
c3f6f71d | 3214 | |
77382aee PA |
3215 | /* Convert PTID to a string. Returns the string in a static |
3216 | buffer. */ | |
c3f6f71d | 3217 | |
7a114964 | 3218 | static const char * |
117de6a9 | 3219 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
3220 | { |
3221 | static char buf[80]; | |
c3f6f71d | 3222 | |
dfd4cc63 LM |
3223 | if (ptid_get_lwp (ptid) == 0) |
3224 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 3225 | else |
dfd4cc63 | 3226 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
3227 | |
3228 | return buf; | |
c3f6f71d JM |
3229 | } |
3230 | ||
77382aee | 3231 | /* Insert a watchpoint. */ |
c3f6f71d | 3232 | |
a0911fd0 | 3233 | static int |
39f77062 | 3234 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 3235 | int after) |
c906108c | 3236 | { |
c3f6f71d | 3237 | int pflags = 0; |
19958708 | 3238 | procinfo *pi; |
c3f6f71d | 3239 | |
dfd4cc63 LM |
3240 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
3241 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
3242 | 0); | |
c3f6f71d | 3243 | |
0df8b418 MS |
3244 | /* Translate from GDB's flags to /proc's. */ |
3245 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 3246 | { |
0df8b418 | 3247 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
3248 | case hw_write: /* default watchpoint (write) */ |
3249 | pflags = WRITE_WATCHFLAG; | |
3250 | break; | |
3251 | case hw_read: /* read watchpoint */ | |
3252 | pflags = READ_WATCHFLAG; | |
3253 | break; | |
3254 | case hw_access: /* access watchpoint */ | |
3255 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
3256 | break; | |
3257 | case hw_execute: /* execution HW breakpoint */ | |
3258 | pflags = EXEC_WATCHFLAG; | |
3259 | break; | |
0df8b418 | 3260 | default: /* Something weird. Return error. */ |
c906108c | 3261 | return -1; |
c3f6f71d | 3262 | } |
0df8b418 | 3263 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
3264 | pflags |= AFTER_WATCHFLAG; |
3265 | } | |
3266 | ||
3267 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
3268 | { | |
0df8b418 | 3269 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
3270 | return -1; /* fail */ |
3271 | /* GDB may try to remove the same watchpoint twice. | |
3272 | If a remove request returns no match, don't error. */ | |
c906108c | 3273 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
3274 | return 0; /* ignore */ |
3275 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c SS |
3276 | } |
3277 | return 0; | |
3278 | } | |
3279 | ||
1e03ad20 KB |
3280 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
3281 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
3282 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
3283 | far. | |
19958708 | 3284 | |
1e03ad20 KB |
3285 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
3286 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 3287 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
3288 | |
3289 | static int | |
5461485a | 3290 | procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f SM |
3291 | enum bptype type, |
3292 | int cnt, int othertype) | |
1e03ad20 | 3293 | { |
1e03ad20 KB |
3294 | /* Due to the way that proc_set_watchpoint() is implemented, host |
3295 | and target pointers must be of the same size. If they are not, | |
3296 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
3297 | fact that proc_set_watchpoint() calls |
3298 | procfs_address_to_host_pointer(); a close inspection of | |
3299 | procfs_address_to_host_pointer will reveal that an internal error | |
3300 | will be generated when the host and target pointer sizes are | |
3301 | different. */ | |
f5656ead | 3302 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 3303 | |
4e906f53 | 3304 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
3305 | return 0; |
3306 | ||
3307 | /* Other tests here??? */ | |
3308 | ||
3309 | return 1; | |
1e03ad20 KB |
3310 | } |
3311 | ||
77382aee PA |
3312 | /* Returns non-zero if process is stopped on a hardware watchpoint |
3313 | fault, else returns zero. */ | |
c3f6f71d | 3314 | |
25513619 | 3315 | static int |
6a109b6b | 3316 | procfs_stopped_by_watchpoint (struct target_ops *ops) |
c906108c | 3317 | { |
c3f6f71d | 3318 | procinfo *pi; |
c906108c | 3319 | |
dfd4cc63 | 3320 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 3321 | |
c3f6f71d | 3322 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3323 | { |
c3f6f71d | 3324 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 3325 | { |
c3f6f71d JM |
3326 | if (proc_what (pi) == FLTWATCH) |
3327 | return 1; | |
c3f6f71d | 3328 | } |
c906108c SS |
3329 | } |
3330 | return 0; | |
3331 | } | |
c906108c | 3332 | |
77382aee PA |
3333 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
3334 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
3335 | address. This function is only called if | |
3336 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
3337 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
3338 | |
3339 | static int | |
3340 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
3341 | { | |
3342 | procinfo *pi; | |
3343 | ||
dfd4cc63 | 3344 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
3345 | return proc_watchpoint_address (pi, addr); |
3346 | } | |
3347 | ||
25513619 | 3348 | static int |
7bb99c53 | 3349 | procfs_insert_watchpoint (struct target_ops *self, |
f486487f SM |
3350 | CORE_ADDR addr, int len, |
3351 | enum target_hw_bp_type type, | |
0cf6dd15 | 3352 | struct expression *cond) |
25513619 | 3353 | { |
d92524f1 | 3354 | if (!target_have_steppable_watchpoint |
f5656ead | 3355 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
3356 | { |
3357 | /* When a hardware watchpoint fires off the PC will be left at | |
3358 | the instruction following the one which caused the | |
3359 | watchpoint. It will *NOT* be necessary for GDB to step over | |
3360 | the watchpoint. */ | |
3361 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
3362 | } | |
3363 | else | |
3364 | { | |
3365 | /* When a hardware watchpoint fires off the PC will be left at | |
3366 | the instruction which caused the watchpoint. It will be | |
3367 | necessary for GDB to step over the watchpoint. */ | |
3368 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
3369 | } | |
3370 | } | |
3371 | ||
3372 | static int | |
11b5219a | 3373 | procfs_remove_watchpoint (struct target_ops *self, |
f486487f SM |
3374 | CORE_ADDR addr, int len, |
3375 | enum target_hw_bp_type type, | |
0cf6dd15 | 3376 | struct expression *cond) |
25513619 PA |
3377 | { |
3378 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
3379 | } | |
3380 | ||
3381 | static int | |
31568a15 TT |
3382 | procfs_region_ok_for_hw_watchpoint (struct target_ops *self, |
3383 | CORE_ADDR addr, int len) | |
25513619 PA |
3384 | { |
3385 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
3386 | system can support "thousands" of hardware watchpoints, but gives | |
3387 | no method for finding out how many; It doesn't say anything about | |
3388 | the allowed size for the watched area either. So we just tell | |
3389 | GDB 'yes'. */ | |
3390 | return 1; | |
3391 | } | |
3392 | ||
3393 | void | |
3394 | procfs_use_watchpoints (struct target_ops *t) | |
3395 | { | |
3396 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
3397 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
3398 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
3399 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 3400 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 3401 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
3402 | } |
3403 | ||
77382aee PA |
3404 | /* Memory Mappings Functions: */ |
3405 | ||
3406 | /* Call a callback function once for each mapping, passing it the | |
3407 | mapping, an optional secondary callback function, and some optional | |
3408 | opaque data. Quit and return the first non-zero value returned | |
3409 | from the callback. | |
3410 | ||
3411 | PI is the procinfo struct for the process to be mapped. FUNC is | |
3412 | the callback function to be called by this iterator. DATA is the | |
3413 | optional opaque data to be passed to the callback function. | |
3414 | CHILD_FUNC is the optional secondary function pointer to be passed | |
3415 | to the child function. Returns the first non-zero return value | |
3416 | from the callback function, or zero. */ | |
831e682e MS |
3417 | |
3418 | static int | |
b8edc417 | 3419 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 3420 | void *data, |
19958708 | 3421 | int (*func) (struct prmap *map, |
b8edc417 | 3422 | find_memory_region_ftype child_func, |
831e682e MS |
3423 | void *data)) |
3424 | { | |
3425 | char pathname[MAX_PROC_NAME_SIZE]; | |
3426 | struct prmap *prmaps; | |
3427 | struct prmap *prmap; | |
3428 | int funcstat; | |
3429 | int map_fd; | |
3430 | int nmap; | |
0a86f364 | 3431 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e | 3432 | struct stat sbuf; |
831e682e | 3433 | |
19958708 | 3434 | /* Get the number of mappings, allocate space, |
831e682e | 3435 | and read the mappings into prmaps. */ |
0df8b418 | 3436 | /* Open map fd. */ |
831e682e MS |
3437 | sprintf (pathname, "/proc/%d/map", pi->pid); |
3438 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
3439 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
3440 | ||
0df8b418 | 3441 | /* Make sure it gets closed again. */ |
831e682e MS |
3442 | make_cleanup_close (map_fd); |
3443 | ||
19958708 | 3444 | /* Use stat to determine the file size, and compute |
831e682e MS |
3445 | the number of prmap_t objects it contains. */ |
3446 | if (fstat (map_fd, &sbuf) != 0) | |
3447 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
3448 | ||
3449 | nmap = sbuf.st_size / sizeof (prmap_t); | |
3450 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
3451 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
3452 | != (nmap * sizeof (*prmaps))) | |
3453 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
831e682e MS |
3454 | |
3455 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
3456 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
3457 | { |
3458 | do_cleanups (cleanups); | |
3459 | return funcstat; | |
3460 | } | |
831e682e | 3461 | |
0a86f364 | 3462 | do_cleanups (cleanups); |
831e682e MS |
3463 | return 0; |
3464 | } | |
3465 | ||
77382aee | 3466 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 3467 | function for each memory region. |
77382aee | 3468 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
3469 | |
3470 | static int | |
19958708 | 3471 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 3472 | find_memory_region_ftype func, void *data) |
be4d1333 | 3473 | { |
bf75638e | 3474 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 3475 | map->pr_size, |
be4d1333 MS |
3476 | (map->pr_mflags & MA_READ) != 0, |
3477 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 3478 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 3479 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
3480 | data); |
3481 | } | |
3482 | ||
77382aee PA |
3483 | /* External interface. Calls a callback function once for each |
3484 | mapped memory region in the child process, passing as arguments: | |
3485 | ||
3486 | CORE_ADDR virtual_address, | |
3487 | unsigned long size, | |
3488 | int read, TRUE if region is readable by the child | |
3489 | int write, TRUE if region is writable by the child | |
3490 | int execute TRUE if region is executable by the child. | |
3491 | ||
3492 | Stops iterating and returns the first non-zero value returned by | |
3493 | the callback. */ | |
be4d1333 MS |
3494 | |
3495 | static int | |
2e73927c TT |
3496 | proc_find_memory_regions (struct target_ops *self, |
3497 | find_memory_region_ftype func, void *data) | |
be4d1333 | 3498 | { |
dfd4cc63 | 3499 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3500 | |
19958708 | 3501 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
3502 | find_memory_regions_callback); |
3503 | } | |
3504 | ||
77382aee | 3505 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 3506 | |
388faa48 | 3507 | static char * |
5ae5f592 | 3508 | mappingflags (long flags) |
388faa48 MS |
3509 | { |
3510 | static char asciiflags[8]; | |
3511 | ||
3512 | strcpy (asciiflags, "-------"); | |
388faa48 MS |
3513 | if (flags & MA_STACK) |
3514 | asciiflags[1] = 's'; | |
3515 | if (flags & MA_BREAK) | |
3516 | asciiflags[2] = 'b'; | |
3517 | if (flags & MA_SHARED) | |
3518 | asciiflags[3] = 's'; | |
3519 | if (flags & MA_READ) | |
3520 | asciiflags[4] = 'r'; | |
3521 | if (flags & MA_WRITE) | |
3522 | asciiflags[5] = 'w'; | |
3523 | if (flags & MA_EXEC) | |
3524 | asciiflags[6] = 'x'; | |
3525 | return (asciiflags); | |
3526 | } | |
3527 | ||
77382aee PA |
3528 | /* Callback function, does the actual work for 'info proc |
3529 | mappings'. */ | |
831e682e | 3530 | |
831e682e | 3531 | static int |
b8edc417 | 3532 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 3533 | void *unused) |
831e682e | 3534 | { |
0b62613e | 3535 | unsigned int pr_off; |
831e682e | 3536 | |
0b62613e | 3537 | pr_off = (unsigned int) map->pr_offset; |
0b62613e | 3538 | |
f5656ead | 3539 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 3540 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
3541 | (unsigned long) map->pr_vaddr, |
3542 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3543 | (unsigned long) map->pr_size, |
0b62613e PA |
3544 | pr_off, |
3545 | mappingflags (map->pr_mflags)); | |
3546 | else | |
f6a96b83 | 3547 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
3548 | (unsigned long) map->pr_vaddr, |
3549 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 3550 | (unsigned long) map->pr_size, |
0b62613e PA |
3551 | pr_off, |
3552 | mappingflags (map->pr_mflags)); | |
831e682e MS |
3553 | |
3554 | return 0; | |
3555 | } | |
3556 | ||
77382aee | 3557 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
3558 | |
3559 | static void | |
3560 | info_proc_mappings (procinfo *pi, int summary) | |
3561 | { | |
388faa48 | 3562 | if (summary) |
0df8b418 | 3563 | return; /* No output for summary mode. */ |
388faa48 | 3564 | |
a3f17187 | 3565 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 3566 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
3567 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
3568 | "Start Addr", | |
3569 | " End Addr", | |
3570 | " Size", | |
3571 | " Offset", | |
3572 | "Flags"); | |
3573 | else | |
3574 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
3575 | "Start Addr", | |
3576 | " End Addr", | |
3577 | " Size", | |
3578 | " Offset", | |
3579 | "Flags"); | |
388faa48 | 3580 | |
831e682e | 3581 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
3582 | printf_filtered ("\n"); |
3583 | } | |
3584 | ||
77382aee | 3585 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
3586 | |
3587 | static void | |
7bc112c1 | 3588 | procfs_info_proc (struct target_ops *ops, const char *args, |
145b16a9 | 3589 | enum info_proc_what what) |
c906108c | 3590 | { |
c3f6f71d | 3591 | struct cleanup *old_chain; |
388faa48 MS |
3592 | procinfo *process = NULL; |
3593 | procinfo *thread = NULL; | |
388faa48 MS |
3594 | char *tmp = NULL; |
3595 | int pid = 0; | |
3596 | int tid = 0; | |
3597 | int mappings = 0; | |
c906108c | 3598 | |
145b16a9 UW |
3599 | switch (what) |
3600 | { | |
3601 | case IP_MINIMAL: | |
3602 | break; | |
3603 | ||
3604 | case IP_MAPPINGS: | |
3605 | case IP_ALL: | |
3606 | mappings = 1; | |
3607 | break; | |
3608 | ||
3609 | default: | |
3610 | error (_("Not supported on this target.")); | |
3611 | } | |
3612 | ||
c3f6f71d | 3613 | old_chain = make_cleanup (null_cleanup, 0); |
773a1edc | 3614 | gdb_argv built_argv (args); |
4fa7574e | 3615 | for (char *arg : built_argv) |
c3f6f71d | 3616 | { |
773a1edc | 3617 | if (isdigit (arg[0])) |
c3f6f71d | 3618 | { |
773a1edc | 3619 | pid = strtoul (arg, &tmp, 10); |
c3f6f71d JM |
3620 | if (*tmp == '/') |
3621 | tid = strtoul (++tmp, NULL, 10); | |
3622 | } | |
773a1edc | 3623 | else if (arg[0] == '/') |
c3f6f71d | 3624 | { |
773a1edc | 3625 | tid = strtoul (arg + 1, NULL, 10); |
c3f6f71d | 3626 | } |
c3f6f71d JM |
3627 | } |
3628 | if (pid == 0) | |
dfd4cc63 | 3629 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 3630 | if (pid == 0) |
8a3fe4f8 | 3631 | error (_("No current process: you must name one.")); |
c3f6f71d | 3632 | else |
c906108c | 3633 | { |
c3f6f71d | 3634 | /* Have pid, will travel. |
0df8b418 | 3635 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
3636 | process = find_procinfo (pid, 0); |
3637 | if (process == NULL) | |
3638 | { | |
19958708 | 3639 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
3640 | remember to close it again when finished. */ |
3641 | process = create_procinfo (pid, 0); | |
004527cb | 3642 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
3643 | if (!open_procinfo_files (process, FD_CTL)) |
3644 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
3645 | } | |
c906108c | 3646 | } |
c3f6f71d JM |
3647 | if (tid != 0) |
3648 | thread = create_procinfo (pid, tid); | |
3649 | ||
3650 | if (process) | |
3651 | { | |
a3f17187 | 3652 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
3653 | proc_prettyprint_flags (proc_flags (process), 1); |
3654 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
3655 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
3656 | if (proc_get_nthreads (process) > 1) | |
19958708 | 3657 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
3658 | proc_get_nthreads (process)); |
3659 | } | |
3660 | if (thread) | |
3661 | { | |
a3f17187 | 3662 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
3663 | proc_prettyprint_flags (proc_flags (thread), 1); |
3664 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
3665 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
3666 | } | |
3667 | ||
388faa48 MS |
3668 | if (mappings) |
3669 | { | |
3670 | info_proc_mappings (process, 0); | |
3671 | } | |
3672 | ||
c3f6f71d | 3673 | do_cleanups (old_chain); |
c906108c SS |
3674 | } |
3675 | ||
9185ddce JB |
3676 | /* Modify the status of the system call identified by SYSCALLNUM in |
3677 | the set of syscalls that are currently traced/debugged. | |
3678 | ||
3679 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 3680 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 3681 | |
0df8b418 | 3682 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
3683 | will be disabled. */ |
3684 | ||
3685 | static void | |
3686 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 3687 | int mode, int from_tty) |
9185ddce JB |
3688 | { |
3689 | sysset_t *sysset; | |
77382aee | 3690 | |
9185ddce JB |
3691 | if (entry_or_exit == PR_SYSENTRY) |
3692 | sysset = proc_get_traced_sysentry (pi, NULL); | |
3693 | else | |
3694 | sysset = proc_get_traced_sysexit (pi, NULL); | |
3695 | ||
3696 | if (sysset == NULL) | |
3697 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
3698 | ||
3699 | if (mode == FLAG_SET) | |
44122162 | 3700 | praddset (sysset, syscallnum); |
9185ddce | 3701 | else |
44122162 | 3702 | prdelset (sysset, syscallnum); |
9185ddce JB |
3703 | |
3704 | if (entry_or_exit == PR_SYSENTRY) | |
3705 | { | |
3706 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 3707 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
3708 | } |
3709 | else | |
3710 | { | |
3711 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 3712 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
3713 | } |
3714 | } | |
3715 | ||
c3f6f71d | 3716 | static void |
0b39b52e | 3717 | proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 3718 | { |
c3f6f71d | 3719 | procinfo *pi; |
c906108c | 3720 | |
dfd4cc63 | 3721 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 3722 | error (_("you must be debugging a process to use this command.")); |
c906108c | 3723 | |
c3f6f71d | 3724 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 3725 | error_no_arg (_("system call to trace")); |
c3f6f71d | 3726 | |
dfd4cc63 | 3727 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3728 | if (isdigit (args[0])) |
3729 | { | |
9185ddce | 3730 | const int syscallnum = atoi (args); |
c906108c | 3731 | |
9185ddce | 3732 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
3733 | } |
3734 | } | |
3735 | ||
19958708 | 3736 | static void |
0b39b52e | 3737 | proc_trace_sysentry_cmd (const char *args, int from_tty) |
c906108c | 3738 | { |
c3f6f71d JM |
3739 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
3740 | } | |
c906108c | 3741 | |
19958708 | 3742 | static void |
0b39b52e | 3743 | proc_trace_sysexit_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3744 | { |
3745 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 3746 | } |
c906108c | 3747 | |
19958708 | 3748 | static void |
0b39b52e | 3749 | proc_untrace_sysentry_cmd (const char *args, int from_tty) |
c3f6f71d JM |
3750 | { |
3751 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
3752 | } | |
3753 | ||
19958708 | 3754 | static void |
0b39b52e | 3755 | proc_untrace_sysexit_cmd (const char *args, int from_tty) |
c906108c | 3756 | { |
c3f6f71d JM |
3757 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
3758 | } | |
c906108c | 3759 | |
c906108c | 3760 | void |
fba45db2 | 3761 | _initialize_procfs (void) |
c906108c | 3762 | { |
27087a3d JB |
3763 | observer_attach_inferior_created (procfs_inferior_created); |
3764 | ||
19958708 | 3765 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 3766 | _("Give a trace of entries into the syscall.")); |
19958708 | 3767 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 3768 | _("Give a trace of exits from the syscall.")); |
19958708 | 3769 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 3770 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 3771 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 3772 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
3773 | } |
3774 | ||
3775 | /* =================== END, GDB "MODULE" =================== */ | |
3776 | ||
3777 | ||
3778 | ||
77382aee PA |
3779 | /* miscellaneous stubs: */ |
3780 | ||
3781 | /* The following satisfy a few random symbols mostly created by the | |
3782 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 3783 | |
77382aee PA |
3784 | /* Return a pid for which we guarantee we will be able to find a |
3785 | 'live' procinfo. */ | |
c3f6f71d | 3786 | |
39f77062 | 3787 | ptid_t |
fba45db2 | 3788 | procfs_first_available (void) |
c3f6f71d | 3789 | { |
39f77062 | 3790 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 3791 | } |
be4d1333 MS |
3792 | |
3793 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
3794 | ||
3795 | static char * | |
19958708 | 3796 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 3797 | char *note_data, int *note_size, |
2ea28649 | 3798 | enum gdb_signal stop_signal) |
be4d1333 | 3799 | { |
594f7785 | 3800 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
3801 | gdb_gregset_t gregs; |
3802 | gdb_fpregset_t fpregs; | |
3803 | unsigned long merged_pid; | |
3804 | ||
dfd4cc63 | 3805 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 3806 | |
75125405 DJ |
3807 | /* This part is the old method for fetching registers. |
3808 | It should be replaced by the newer one using regsets | |
3809 | once it is implemented in this platform: | |
29082443 | 3810 | gdbarch_iterate_over_regset_sections(). */ |
75125405 | 3811 | |
2989a365 | 3812 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
75125405 DJ |
3813 | inferior_ptid = ptid; |
3814 | target_fetch_registers (regcache, -1); | |
3815 | ||
594f7785 | 3816 | fill_gregset (regcache, &gregs, -1); |
65554fef MS |
3817 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
3818 | note_data, | |
3819 | note_size, | |
19958708 | 3820 | merged_pid, |
65554fef MS |
3821 | stop_signal, |
3822 | &gregs); | |
594f7785 | 3823 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
3824 | note_data = (char *) elfcore_write_prfpreg (obfd, |
3825 | note_data, | |
3826 | note_size, | |
3827 | &fpregs, | |
3828 | sizeof (fpregs)); | |
75125405 | 3829 | |
be4d1333 MS |
3830 | return note_data; |
3831 | } | |
3832 | ||
3833 | struct procfs_corefile_thread_data { | |
3834 | bfd *obfd; | |
3835 | char *note_data; | |
3836 | int *note_size; | |
2ea28649 | 3837 | enum gdb_signal stop_signal; |
be4d1333 MS |
3838 | }; |
3839 | ||
3840 | static int | |
65554fef | 3841 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 | 3842 | { |
b196bc4c RO |
3843 | struct procfs_corefile_thread_data *args |
3844 | = (struct procfs_corefile_thread_data *) data; | |
be4d1333 | 3845 | |
2689673f | 3846 | if (pi != NULL) |
be4d1333 | 3847 | { |
dfd4cc63 | 3848 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 3849 | |
75125405 | 3850 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 3851 | args->note_data, |
2020b7ab PA |
3852 | args->note_size, |
3853 | args->stop_signal); | |
be4d1333 MS |
3854 | } |
3855 | return 0; | |
3856 | } | |
3857 | ||
a223f1e7 JB |
3858 | static int |
3859 | find_signalled_thread (struct thread_info *info, void *data) | |
3860 | { | |
a493e3e2 | 3861 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
3862 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
3863 | return 1; | |
3864 | ||
3865 | return 0; | |
3866 | } | |
3867 | ||
2ea28649 | 3868 | static enum gdb_signal |
a223f1e7 JB |
3869 | find_stop_signal (void) |
3870 | { | |
3871 | struct thread_info *info = | |
3872 | iterate_over_threads (find_signalled_thread, NULL); | |
3873 | ||
3874 | if (info) | |
16c381f0 | 3875 | return info->suspend.stop_signal; |
a223f1e7 | 3876 | else |
a493e3e2 | 3877 | return GDB_SIGNAL_0; |
a223f1e7 JB |
3878 | } |
3879 | ||
be4d1333 | 3880 | static char * |
fc6691b2 | 3881 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 MS |
3882 | { |
3883 | struct cleanup *old_chain; | |
3884 | gdb_gregset_t gregs; | |
3885 | gdb_fpregset_t fpregs; | |
3886 | char fname[16] = {'\0'}; | |
3887 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 3888 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 3889 | char *note_data = NULL; |
6dbdc4a3 | 3890 | char *inf_args; |
be4d1333 | 3891 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 3892 | gdb_byte *auxv; |
4e73f23d | 3893 | int auxv_len; |
2ea28649 | 3894 | enum gdb_signal stop_signal; |
be4d1333 MS |
3895 | |
3896 | if (get_exec_file (0)) | |
3897 | { | |
9f37bbcc | 3898 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
3899 | fname[sizeof (fname) - 1] = 0; |
3900 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
3901 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
3902 | |
3903 | inf_args = get_inferior_args (); | |
3904 | if (inf_args && *inf_args && | |
3905 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 3906 | { |
19958708 | 3907 | strncat (psargs, " ", |
be4d1333 | 3908 | sizeof (psargs) - strlen (psargs)); |
19958708 | 3909 | strncat (psargs, inf_args, |
be4d1333 MS |
3910 | sizeof (psargs) - strlen (psargs)); |
3911 | } | |
3912 | } | |
3913 | ||
19958708 RM |
3914 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
3915 | note_data, | |
3916 | note_size, | |
3917 | fname, | |
be4d1333 MS |
3918 | psargs); |
3919 | ||
651c8d2d PA |
3920 | stop_signal = find_stop_signal (); |
3921 | ||
3e3420f6 PA |
3922 | fill_gregset (get_current_regcache (), &gregs, -1); |
3923 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 3924 | ptid_get_pid (inferior_ptid), |
3e3420f6 | 3925 | stop_signal, &gregs); |
3e3420f6 | 3926 | |
be4d1333 MS |
3927 | thread_args.obfd = obfd; |
3928 | thread_args.note_data = note_data; | |
3929 | thread_args.note_size = note_size; | |
651c8d2d | 3930 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
3931 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
3932 | &thread_args); | |
2689673f | 3933 | note_data = thread_args.note_data; |
be4d1333 | 3934 | |
13547ab6 DJ |
3935 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
3936 | NULL, &auxv); | |
4e73f23d RM |
3937 | if (auxv_len > 0) |
3938 | { | |
3939 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
3940 | "CORE", NT_AUXV, auxv, auxv_len); | |
3941 | xfree (auxv); | |
3942 | } | |
3943 | ||
be4d1333 MS |
3944 | return note_data; |
3945 | } | |
be4d1333 | 3946 | /* =================== END GCORE .NOTE "MODULE" =================== */ |