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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
c3f6f71d JM |
2 | Copyright 1999 Free Software Foundation, Inc. |
3 | Written by Michael Snyder at Cygnus Solutions. | |
4 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 5 | |
c3f6f71d | 6 | This file is part of GDB. |
c906108c | 7 | |
c3f6f71d JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c3f6f71d JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c3f6f71d JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software Foundation, | |
20 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
c906108c | 21 | |
c3f6f71d JM |
22 | #include "defs.h" |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "gdbcore.h" | |
26 | #include "gdbcmd.h" | |
0fda6bd2 | 27 | #include "gdbthread.h" |
c906108c | 28 | |
c3f6f71d JM |
29 | #if defined (NEW_PROC_API) |
30 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
31 | #endif | |
c906108c | 32 | |
c3f6f71d JM |
33 | #include <sys/procfs.h> |
34 | #include <sys/fault.h> | |
35 | #include <sys/syscall.h> | |
36 | #include <sys/errno.h> | |
0fda6bd2 JM |
37 | #include <sys/wait.h> |
38 | #include <signal.h> | |
39 | #include <ctype.h> | |
40 | ||
41 | #include "proc-utils.h" | |
c3f6f71d JM |
42 | |
43 | /* | |
44 | * PROCFS.C | |
45 | * | |
46 | * This module provides the interface between GDB and the | |
47 | * /proc file system, which is used on many versions of Unix | |
48 | * as a means for debuggers to control other processes. | |
49 | * Examples of the systems that use this interface are: | |
50 | * Irix | |
51 | * Solaris | |
52 | * OSF | |
53 | * Unixware | |
54 | * | |
55 | * /proc works by immitating a file system: you open a simulated file | |
56 | * that represents the process you wish to interact with, and | |
57 | * perform operations on that "file" in order to examine or change | |
58 | * the state of the other process. | |
59 | * | |
60 | * The most important thing to know about /proc and this module | |
61 | * is that there are two very different interfaces to /proc: | |
62 | * One that uses the ioctl system call, and | |
63 | * another that uses read and write system calls. | |
64 | * This module has to support both /proc interfaces. This means | |
65 | * that there are two different ways of doing every basic operation. | |
66 | * | |
67 | * In order to keep most of the code simple and clean, I have | |
68 | * defined an interface "layer" which hides all these system calls. | |
69 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
70 | * and most or all occurrances of this ifdef should be confined to | |
71 | * this interface layer. | |
c906108c SS |
72 | */ |
73 | ||
74 | ||
c3f6f71d JM |
75 | /* Determine which /proc API we are using: |
76 | The ioctl API defines PIOCSTATUS, while | |
77 | the read/write (multiple fd) API never does. */ | |
c906108c | 78 | |
c3f6f71d | 79 | #ifdef NEW_PROC_API |
c906108c | 80 | #include <sys/types.h> |
c3f6f71d JM |
81 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
82 | #endif | |
c906108c | 83 | |
c3f6f71d JM |
84 | #include <fcntl.h> /* for O_RDONLY */ |
85 | #include <unistd.h> /* for "X_OK" */ | |
86 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 87 | |
c3f6f71d | 88 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 89 | |
c3f6f71d JM |
90 | /* |
91 | * This module defines the GDB target vector and its methods. | |
92 | */ | |
c906108c | 93 | |
c3f6f71d JM |
94 | static void procfs_open PARAMS((char *, int)); |
95 | static void procfs_attach PARAMS ((char *, int)); | |
96 | static void procfs_detach PARAMS ((char *, int)); | |
97 | static void procfs_resume PARAMS ((int, int, enum target_signal)); | |
98 | static int procfs_can_run PARAMS ((void)); | |
99 | static void procfs_stop PARAMS ((void)); | |
100 | static void procfs_files_info PARAMS ((struct target_ops *)); | |
101 | static void procfs_fetch_registers PARAMS ((int)); | |
102 | static void procfs_store_registers PARAMS ((int)); | |
103 | static void procfs_notice_signals PARAMS ((int)); | |
104 | static void procfs_prepare_to_store PARAMS ((void)); | |
105 | static void procfs_kill_inferior PARAMS ((void)); | |
106 | static void procfs_mourn_inferior PARAMS ((void)); | |
107 | static void procfs_create_inferior PARAMS ((char *, char *, char **)); | |
108 | static int procfs_wait PARAMS ((int, | |
109 | struct target_waitstatus *)); | |
110 | static int procfs_xfer_memory PARAMS ((CORE_ADDR, | |
111 | char *, int, int, | |
112 | struct target_ops *)); | |
113 | ||
114 | static int procfs_thread_alive PARAMS ((int)); | |
115 | ||
116 | void procfs_find_new_threads PARAMS ((void)); | |
117 | char *procfs_pid_to_str PARAMS ((int)); | |
118 | ||
119 | struct target_ops procfs_ops; /* the target vector */ | |
c906108c | 120 | |
c3f6f71d JM |
121 | static void |
122 | init_procfs_ops () | |
123 | { | |
124 | procfs_ops.to_shortname = "procfs"; | |
125 | procfs_ops.to_longname = "Unix /proc child process"; | |
126 | procfs_ops.to_doc = | |
127 | "Unix /proc child process (started by the \"run\" command)."; | |
128 | procfs_ops.to_open = procfs_open; | |
129 | procfs_ops.to_can_run = procfs_can_run; | |
130 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
131 | procfs_ops.to_kill = procfs_kill_inferior; | |
132 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
133 | procfs_ops.to_attach = procfs_attach; | |
134 | procfs_ops.to_detach = procfs_detach; | |
135 | procfs_ops.to_wait = procfs_wait; | |
136 | procfs_ops.to_resume = procfs_resume; | |
137 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
138 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
139 | procfs_ops.to_store_registers = procfs_store_registers; | |
140 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
141 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
142 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
143 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
144 | procfs_ops.to_files_info = procfs_files_info; | |
145 | procfs_ops.to_stop = procfs_stop; | |
146 | ||
147 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
148 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
149 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
150 | procfs_ops.to_terminal_ours = terminal_ours; | |
151 | procfs_ops.to_terminal_info = child_terminal_info; | |
152 | ||
153 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
154 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
155 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
156 | ||
157 | procfs_ops.to_has_execution = 1; | |
158 | procfs_ops.to_has_stack = 1; | |
159 | procfs_ops.to_has_registers = 1; | |
160 | procfs_ops.to_stratum = process_stratum; | |
161 | procfs_ops.to_has_thread_control = tc_schedlock; | |
162 | procfs_ops.to_magic = OPS_MAGIC; | |
163 | } | |
c906108c | 164 | |
c3f6f71d JM |
165 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
166 | ||
167 | /* | |
168 | * Temporary debugging code: | |
169 | * | |
170 | * These macros allow me to trace the system calls that we make | |
171 | * to control the child process. This is quite handy for comparing | |
172 | * with the older version of procfs. | |
173 | */ | |
174 | ||
175 | #ifdef TRACE_PROCFS | |
176 | #ifdef NEW_PROC_API | |
177 | extern int write_with_trace PARAMS ((int, void *, size_t, char *, int)); | |
178 | extern off_t lseek_with_trace PARAMS ((int, off_t, int, char *, int)); | |
c3f6f71d | 179 | #define write(X,Y,Z) write_with_trace (X, Y, Z, __FILE__, __LINE__) |
c3f6f71d JM |
180 | #define lseek(X,Y,Z) lseek_with_trace (X, Y, Z, __FILE__, __LINE__) |
181 | #else | |
182 | extern int ioctl_with_trace PARAMS ((int, long, void *, char *, int)); | |
183 | #define ioctl(X,Y,Z) ioctl_with_trace (X, Y, Z, __FILE__, __LINE__) | |
c906108c | 184 | #endif |
c3f6f71d JM |
185 | #define open(X,Y) open_with_trace (X, Y, __FILE__, __LINE__) |
186 | #define close(X) close_with_trace (X, __FILE__, __LINE__) | |
187 | #define wait(X) wait_with_trace (X, __FILE__, __LINE__) | |
c3f6f71d JM |
188 | #define PROCFS_NOTE(X) procfs_note (X, __FILE__, __LINE__) |
189 | #define PROC_PRETTYFPRINT_STATUS(X,Y,Z,T) \ | |
190 | proc_prettyfprint_status (X, Y, Z, T) | |
c3f6f71d JM |
191 | #else |
192 | #define PROCFS_NOTE(X) | |
193 | #define PROC_PRETTYFPRINT_STATUS(X,Y,Z,T) | |
c906108c SS |
194 | #endif |
195 | ||
c3f6f71d JM |
196 | |
197 | /* | |
198 | * World Unification: | |
199 | * | |
200 | * Put any typedefs, defines etc. here that are required for | |
201 | * the unification of code that handles different versions of /proc. | |
202 | */ | |
203 | ||
204 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
205 | #ifndef UNIXWARE | |
206 | enum { READ_WATCHFLAG = WA_READ, | |
207 | WRITE_WATCHFLAG = WA_WRITE, | |
208 | EXEC_WATCHFLAG = WA_EXEC, | |
209 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
210 | }; | |
211 | #endif | |
212 | #else /* Irix method for watchpoints */ | |
213 | enum { READ_WATCHFLAG = MA_READ, | |
214 | WRITE_WATCHFLAG = MA_WRITE, | |
215 | EXEC_WATCHFLAG = MA_EXEC, | |
216 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
217 | }; | |
218 | #endif | |
219 | ||
220 | ||
221 | ||
222 | ||
223 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
224 | ||
225 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
226 | ||
227 | /* The procinfo struct is a wrapper to hold all the state information | |
228 | concerning a /proc process. There should be exactly one procinfo | |
229 | for each process, and since GDB currently can debug only one | |
230 | process at a time, that means there should be only one procinfo. | |
231 | All of the LWP's of a process can be accessed indirectly thru the | |
232 | single process procinfo. | |
233 | ||
234 | However, against the day when GDB may debug more than one process, | |
235 | this data structure is kept in a list (which for now will hold no | |
236 | more than one member), and many functions will have a pointer to a | |
237 | procinfo as an argument. | |
238 | ||
239 | There will be a separate procinfo structure for use by the (not yet | |
240 | implemented) "info proc" command, so that we can print useful | |
241 | information about any random process without interfering with the | |
242 | inferior's procinfo information. */ | |
243 | ||
244 | #ifdef NEW_PROC_API | |
245 | /* format strings for /proc paths */ | |
246 | # ifndef CTL_PROC_NAME_FMT | |
247 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
248 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
249 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
250 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
251 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
252 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
253 | # endif | |
254 | /* the name of the proc status struct depends on the implementation */ | |
255 | typedef pstatus_t gdb_prstatus_t; | |
256 | typedef lwpstatus_t gdb_lwpstatus_t; | |
257 | #else /* ! NEW_PROC_API */ | |
258 | /* format strings for /proc paths */ | |
259 | # ifndef CTL_PROC_NAME_FMT | |
260 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
261 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
262 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
263 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
264 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
265 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
266 | # endif | |
c906108c | 267 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 268 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
269 | typedef prstatus_t gdb_lwpstatus_t; |
270 | #endif /* NEW_PROC_API */ | |
c906108c SS |
271 | |
272 | ||
273 | /* These #ifdefs are for sol2.x in particular. sol2.x has | |
274 | both a "gregset_t" and a "prgregset_t", which have | |
275 | similar uses but different layouts. sol2.x gdb tries to | |
276 | use prgregset_t (and prfpregset_t) everywhere. */ | |
277 | ||
278 | #ifdef GDB_GREGSET_TYPE | |
c3f6f71d | 279 | typedef GDB_GREGSET_TYPE gdb_gregset_t; |
c906108c | 280 | #else |
c3f6f71d | 281 | typedef gregset_t gdb_gregset_t; |
c906108c SS |
282 | #endif |
283 | ||
284 | #ifdef GDB_FPREGSET_TYPE | |
c3f6f71d | 285 | typedef GDB_FPREGSET_TYPE gdb_fpregset_t; |
c906108c | 286 | #else |
c3f6f71d | 287 | typedef fpregset_t gdb_fpregset_t; |
c906108c SS |
288 | #endif |
289 | ||
0d06e24b JM |
290 | /* Provide default composite pid manipulation macros for systems that |
291 | don't have threads. */ | |
c906108c | 292 | |
c3f6f71d | 293 | #ifndef PIDGET |
0d06e24b JM |
294 | #define PIDGET(PID) (PID) |
295 | #define TIDGET(PID) (PID) | |
296 | #define MERGEPID(PID, TID) (PID) | |
c906108c SS |
297 | #endif |
298 | ||
c3f6f71d JM |
299 | typedef struct procinfo { |
300 | struct procinfo *next; | |
301 | int pid; /* Process ID */ | |
302 | int tid; /* Thread/LWP id */ | |
c906108c | 303 | |
c3f6f71d JM |
304 | /* process state */ |
305 | int was_stopped; | |
306 | int ignore_next_sigstop; | |
c906108c | 307 | |
c3f6f71d JM |
308 | /* The following four fd fields may be identical, or may contain |
309 | several different fd's, depending on the version of /proc | |
310 | (old ioctl or new read/write). */ | |
c906108c | 311 | |
c3f6f71d JM |
312 | int ctl_fd; /* File descriptor for /proc control file */ |
313 | /* | |
314 | * The next three file descriptors are actually only needed in the | |
315 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
316 | * However, to avoid a bunch of #ifdefs in the code, we will use | |
317 | * them uniformly by (in the case of the ioctl single-file-descriptor | |
318 | * implementation) filling them with copies of the control fd. | |
319 | */ | |
320 | int status_fd; /* File descriptor for /proc status file */ | |
321 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 322 | |
c3f6f71d | 323 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 324 | |
c3f6f71d JM |
325 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
326 | sigset_t saved_sigset; /* Saved traced signal set */ | |
327 | sigset_t saved_sighold; /* Saved held signal set */ | |
328 | sysset_t saved_exitset; /* Saved traced system call exit set */ | |
329 | sysset_t saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 330 | |
c3f6f71d | 331 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 332 | |
c3f6f71d JM |
333 | #ifndef NEW_PROC_API |
334 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 335 | #endif |
c3f6f71d JM |
336 | |
337 | struct procinfo *thread_list; | |
c906108c | 338 | |
c3f6f71d JM |
339 | int status_valid : 1; |
340 | int gregs_valid : 1; | |
341 | int fpregs_valid : 1; | |
342 | int threads_valid: 1; | |
343 | } procinfo; | |
c906108c | 344 | |
c3f6f71d | 345 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 346 | |
c3f6f71d | 347 | /* Function prototypes for procinfo module: */ |
c906108c | 348 | |
c3f6f71d JM |
349 | static procinfo *find_procinfo_or_die PARAMS ((int pid, int tid)); |
350 | static procinfo *find_procinfo PARAMS ((int pid, int tid)); | |
351 | static procinfo *create_procinfo PARAMS ((int pid, int tid)); | |
352 | static void destroy_procinfo PARAMS ((procinfo *p)); | |
353 | static void dead_procinfo PARAMS ((procinfo *p, | |
354 | char *msg, int killp)); | |
355 | static int open_procinfo_files PARAMS ((procinfo *p, int which)); | |
356 | static void close_procinfo_files PARAMS ((procinfo *p)); | |
c906108c | 357 | |
c3f6f71d JM |
358 | /* The head of the procinfo list: */ |
359 | static procinfo * procinfo_list; | |
c906108c | 360 | |
c3f6f71d JM |
361 | /* |
362 | * Function: find_procinfo | |
363 | * | |
364 | * Search the procinfo list. | |
365 | * | |
366 | * Returns: pointer to procinfo, or NULL if not found. | |
367 | */ | |
c906108c | 368 | |
c3f6f71d JM |
369 | static procinfo * |
370 | find_procinfo (pid, tid) | |
371 | int pid; | |
372 | int tid; | |
c5aa993b | 373 | { |
c3f6f71d | 374 | procinfo *pi; |
c906108c | 375 | |
c3f6f71d JM |
376 | for (pi = procinfo_list; pi; pi = pi->next) |
377 | if (pi->pid == pid) | |
378 | break; | |
c906108c | 379 | |
c3f6f71d JM |
380 | if (pi) |
381 | if (tid) | |
382 | { | |
383 | /* Don't check threads_valid. If we're updating the | |
384 | thread_list, we want to find whatever threads are already | |
385 | here. This means that in general it is the caller's | |
386 | responsibility to check threads_valid and update before | |
387 | calling find_procinfo, if the caller wants to find a new | |
388 | thread. */ | |
389 | ||
390 | for (pi = pi->thread_list; pi; pi = pi->next) | |
391 | if (pi->tid == tid) | |
392 | break; | |
393 | } | |
c906108c | 394 | |
c3f6f71d JM |
395 | return pi; |
396 | } | |
c906108c | 397 | |
c3f6f71d JM |
398 | /* |
399 | * Function: find_procinfo_or_die | |
400 | * | |
401 | * Calls find_procinfo, but errors on failure. | |
402 | */ | |
c906108c | 403 | |
c3f6f71d JM |
404 | static procinfo * |
405 | find_procinfo_or_die (pid, tid) | |
406 | int pid; | |
407 | int tid; | |
408 | { | |
409 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 410 | |
c3f6f71d | 411 | if (pi == NULL) |
0fda6bd2 JM |
412 | { |
413 | if (tid) | |
414 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", | |
415 | pid, tid); | |
416 | else | |
417 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
418 | } | |
c3f6f71d JM |
419 | return pi; |
420 | } | |
c906108c | 421 | |
c3f6f71d JM |
422 | /* |
423 | * Function: open_procinfo_files | |
424 | * | |
425 | * Open the file descriptor for the process or LWP. | |
426 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
427 | * the others are opened lazily as needed. | |
428 | * else (if not NEW_PROC_API), there is only one real | |
429 | * file descriptor, but we keep multiple copies of it so that | |
430 | * the code that uses them does not have to be #ifdef'd. | |
431 | * | |
432 | * Return: file descriptor, or zero for failure. | |
433 | */ | |
c906108c | 434 | |
c3f6f71d | 435 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 436 | |
c3f6f71d JM |
437 | static int |
438 | open_procinfo_files (pi, which) | |
439 | procinfo *pi; | |
440 | int which; | |
441 | { | |
0fda6bd2 | 442 | #ifdef NEW_PROC_API |
c3f6f71d | 443 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 444 | #endif |
c3f6f71d JM |
445 | int fd; |
446 | ||
447 | /* | |
448 | * This function is getting ALMOST long enough to break up into several. | |
449 | * Here is some rationale: | |
450 | * | |
451 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
452 | * There are several file descriptors that may need to be open | |
453 | * for any given process or LWP. The ones we're intereted in are: | |
454 | * - control (ctl) write-only change the state | |
455 | * - status (status) read-only query the state | |
456 | * - address space (as) read/write access memory | |
457 | * - map (map) read-only virtual addr map | |
458 | * Most of these are opened lazily as they are needed. | |
459 | * The pathnames for the 'files' for an LWP look slightly | |
460 | * different from those of a first-class process: | |
461 | * Pathnames for a process (<proc-id>): | |
462 | * /proc/<proc-id>/ctl | |
463 | * /proc/<proc-id>/status | |
464 | * /proc/<proc-id>/as | |
465 | * /proc/<proc-id>/map | |
466 | * Pathnames for an LWP (lwp-id): | |
467 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
468 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
469 | * An LWP has no map or address space file descriptor, since | |
470 | * the memory map and address space are shared by all LWPs. | |
471 | * | |
472 | * Everyone else (Solaris 2.5, Irix, OSF) | |
473 | * There is only one file descriptor for each process or LWP. | |
474 | * For convenience, we copy the same file descriptor into all | |
475 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
476 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
477 | * doesn't need any #ifdef's. | |
478 | * Pathname for all: | |
479 | * /proc/<proc-id> | |
480 | * | |
481 | * Solaris 2.5 LWP's: | |
482 | * Each LWP has an independent file descriptor, but these | |
483 | * are not obtained via the 'open' system call like the rest: | |
484 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
485 | * to the file descriptor of the parent process. | |
486 | * | |
487 | * OSF threads: | |
488 | * These do not even have their own independent file descriptor. | |
489 | * All operations are carried out on the file descriptor of the | |
490 | * parent process. Therefore we just call open again for each | |
491 | * thread, getting a new handle for the same 'file'. | |
492 | */ | |
493 | ||
494 | #ifdef NEW_PROC_API | |
495 | /* | |
496 | * In this case, there are several different file descriptors that | |
497 | * we might be asked to open. The control file descriptor will be | |
498 | * opened early, but the others will be opened lazily as they are | |
499 | * needed. | |
500 | */ | |
501 | ||
502 | strcpy (tmp, pi->pathname); | |
503 | switch (which) { /* which file descriptor to open? */ | |
504 | case FD_CTL: | |
505 | if (pi->tid) | |
506 | strcat (tmp, "/lwpctl"); | |
507 | else | |
508 | strcat (tmp, "/ctl"); | |
509 | fd = open (tmp, O_WRONLY); | |
510 | if (fd <= 0) | |
511 | return 0; /* fail */ | |
512 | pi->ctl_fd = fd; | |
513 | break; | |
514 | case FD_AS: | |
515 | if (pi->tid) | |
516 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
517 | strcat (tmp, "/as"); | |
518 | fd = open (tmp, O_RDWR); | |
519 | if (fd <= 0) | |
520 | return 0; /* fail */ | |
521 | pi->as_fd = fd; | |
522 | break; | |
523 | case FD_STATUS: | |
524 | if (pi->tid) | |
525 | strcat (tmp, "/lwpstatus"); | |
526 | else | |
527 | strcat (tmp, "/status"); | |
528 | fd = open (tmp, O_RDONLY); | |
529 | if (fd <= 0) | |
530 | return 0; /* fail */ | |
531 | pi->status_fd = fd; | |
532 | break; | |
533 | default: | |
534 | return 0; /* unknown file descriptor */ | |
535 | } | |
536 | #else /* not NEW_PROC_API */ | |
537 | /* | |
538 | * In this case, there is only one file descriptor for each procinfo | |
539 | * (ie. each process or LWP). In fact, only the file descriptor for | |
540 | * the process can actually be opened by an 'open' system call. | |
541 | * The ones for the LWPs have to be obtained thru an IOCTL call | |
542 | * on the process's file descriptor. | |
543 | * | |
544 | * For convenience, we copy each procinfo's single file descriptor | |
545 | * into all of the fields occupied by the several file descriptors | |
546 | * of the NEW_PROC_API implementation. That way, the code that uses | |
547 | * them can be written without ifdefs. | |
548 | */ | |
549 | ||
550 | ||
551 | #ifdef PIOCTSTATUS /* OSF */ | |
552 | if ((fd = open (pi->pathname, O_RDWR)) == 0) /* Only one FD; just open it. */ | |
553 | return 0; | |
554 | #else /* Sol 2.5, Irix, other? */ | |
555 | if (pi->tid == 0) /* Master procinfo for the process */ | |
556 | { | |
557 | fd = open (pi->pathname, O_RDWR); | |
558 | if (fd <= 0) | |
559 | return 0; /* fail */ | |
560 | } | |
561 | else /* LWP thread procinfo */ | |
562 | { | |
563 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
564 | procinfo *process; | |
565 | int lwpid = pi->tid; | |
566 | ||
567 | /* Find the procinfo for the entire process. */ | |
568 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
569 | return 0; /* fail */ | |
570 | ||
571 | /* Now obtain the file descriptor for the LWP. */ | |
572 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
573 | return 0; /* fail */ | |
574 | #else /* Irix, other? */ | |
575 | return 0; /* Don't know how to open threads */ | |
576 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
577 | } | |
578 | #endif /* OSF PIOCTSTATUS */ | |
579 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
580 | #endif /* NEW_PROC_API */ | |
c906108c | 581 | |
c3f6f71d JM |
582 | return 1; /* success */ |
583 | } | |
c906108c | 584 | |
c3f6f71d JM |
585 | /* |
586 | * Function: create_procinfo | |
587 | * | |
588 | * Allocate a data structure and link it into the procinfo list. | |
589 | * (First tries to find a pre-existing one (FIXME: why???) | |
590 | * | |
591 | * Return: pointer to new procinfo struct. | |
592 | */ | |
c906108c | 593 | |
c3f6f71d JM |
594 | static procinfo * |
595 | create_procinfo (pid, tid) | |
596 | int pid; | |
597 | int tid; | |
598 | { | |
599 | procinfo *pi, *parent; | |
c906108c | 600 | |
0d06e24b | 601 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 602 | return pi; /* Already exists, nothing to do. */ |
c906108c | 603 | |
c3f6f71d JM |
604 | /* find parent before doing malloc, to save having to cleanup */ |
605 | if (tid != 0) | |
606 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
607 | create it if it | |
608 | doesn't exist yet? */ | |
c906108c | 609 | |
c3f6f71d JM |
610 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
611 | memset (pi, 0, sizeof (procinfo)); | |
612 | pi->pid = pid; | |
613 | pi->tid = tid; | |
c906108c | 614 | |
c3f6f71d JM |
615 | /* Chain into list. */ |
616 | if (tid == 0) | |
617 | { | |
618 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
619 | pi->next = procinfo_list; | |
620 | procinfo_list = pi; | |
621 | } | |
622 | else | |
623 | { | |
624 | #ifdef NEW_PROC_API | |
625 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
626 | #else | |
627 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
628 | #endif | |
629 | pi->next = parent->thread_list; | |
630 | parent->thread_list = pi; | |
631 | } | |
632 | return pi; | |
633 | } | |
c906108c | 634 | |
c3f6f71d JM |
635 | /* |
636 | * Function: close_procinfo_files | |
637 | * | |
638 | * Close all file descriptors associated with the procinfo | |
639 | */ | |
c906108c | 640 | |
c3f6f71d JM |
641 | static void |
642 | close_procinfo_files (pi) | |
643 | procinfo *pi; | |
644 | { | |
645 | if (pi->ctl_fd > 0) | |
646 | close (pi->ctl_fd); | |
647 | #ifdef NEW_PROC_API | |
648 | if (pi->as_fd > 0) | |
649 | close (pi->as_fd); | |
650 | if (pi->status_fd > 0) | |
651 | close (pi->status_fd); | |
652 | #endif | |
653 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
654 | } | |
c906108c | 655 | |
c3f6f71d JM |
656 | /* |
657 | * Function: destroy_procinfo | |
658 | * | |
659 | * Destructor function. Close, unlink and deallocate the object. | |
660 | */ | |
c906108c | 661 | |
c3f6f71d JM |
662 | static void |
663 | destroy_one_procinfo (list, pi) | |
664 | procinfo **list; | |
665 | procinfo *pi; | |
666 | { | |
667 | procinfo *ptr; | |
668 | ||
669 | /* Step one: unlink the procinfo from its list */ | |
670 | if (pi == *list) | |
671 | *list = pi->next; | |
672 | else | |
673 | for (ptr = *list; ptr; ptr = ptr->next) | |
674 | if (ptr->next == pi) | |
675 | { | |
676 | ptr->next = pi->next; | |
677 | break; | |
678 | } | |
7a292a7a | 679 | |
c3f6f71d JM |
680 | /* Step two: close any open file descriptors */ |
681 | close_procinfo_files (pi); | |
7a292a7a | 682 | |
c3f6f71d JM |
683 | /* Step three: free the memory. */ |
684 | free (pi); | |
685 | } | |
c906108c | 686 | |
c3f6f71d JM |
687 | static void |
688 | destroy_procinfo (pi) | |
689 | procinfo *pi; | |
690 | { | |
691 | procinfo *tmp; | |
c906108c | 692 | |
c3f6f71d JM |
693 | if (pi->tid != 0) /* destroy a thread procinfo */ |
694 | { | |
695 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
696 | destroy_one_procinfo (&tmp->thread_list, pi); | |
697 | } | |
698 | else /* destroy a process procinfo and all its threads */ | |
699 | { | |
700 | /* First destroy the children, if any; */ | |
701 | while (pi->thread_list != NULL) | |
702 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
703 | /* Then destroy the parent. Genocide!!! */ | |
704 | destroy_one_procinfo (&procinfo_list, pi); | |
705 | } | |
706 | } | |
c906108c | 707 | |
c3f6f71d | 708 | enum { NOKILL, KILL }; |
c906108c | 709 | |
c3f6f71d JM |
710 | /* |
711 | * Function: dead_procinfo | |
712 | * | |
713 | * To be called on a non_recoverable error for a procinfo. | |
714 | * Prints error messages, optionally sends a SIGKILL to the process, | |
715 | * then destroys the data structure. | |
716 | */ | |
c906108c | 717 | |
c3f6f71d JM |
718 | static void |
719 | dead_procinfo (pi, msg, kill_p) | |
720 | procinfo *pi; | |
721 | char *msg; | |
722 | int kill_p; | |
723 | { | |
724 | char procfile[80]; | |
c906108c | 725 | |
c3f6f71d JM |
726 | if (pi->pathname) |
727 | { | |
728 | print_sys_errmsg (pi->pathname, errno); | |
729 | } | |
730 | else | |
731 | { | |
732 | sprintf (procfile, "process %d", pi->pid); | |
733 | print_sys_errmsg (procfile, errno); | |
734 | } | |
735 | if (kill_p == KILL) | |
736 | kill (pi->pid, SIGKILL); | |
c906108c | 737 | |
c3f6f71d JM |
738 | destroy_procinfo (pi); |
739 | error (msg); | |
740 | } | |
c906108c | 741 | |
c3f6f71d | 742 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 743 | |
c3f6f71d | 744 | /* =================== /proc "MODULE" =================== */ |
c906108c | 745 | |
c3f6f71d JM |
746 | /* |
747 | * This "module" is the interface layer between the /proc system API | |
748 | * and the gdb target vector functions. This layer consists of | |
749 | * access functions that encapsulate each of the basic operations | |
750 | * that we need to use from the /proc API. | |
751 | * | |
752 | * The main motivation for this layer is to hide the fact that | |
753 | * there are two very different implementations of the /proc API. | |
754 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
755 | * functions, we do our best to hide them all in here. | |
756 | */ | |
c906108c | 757 | |
c3f6f71d JM |
758 | int proc_get_status PARAMS ((procinfo *pi)); |
759 | long proc_flags PARAMS ((procinfo *pi)); | |
760 | int proc_why PARAMS ((procinfo *pi)); | |
761 | int proc_what PARAMS ((procinfo *pi)); | |
762 | int proc_set_run_on_last_close PARAMS ((procinfo *pi)); | |
763 | int proc_unset_run_on_last_close PARAMS ((procinfo *pi)); | |
764 | int proc_set_inherit_on_fork PARAMS ((procinfo *pi)); | |
765 | int proc_unset_inherit_on_fork PARAMS ((procinfo *pi)); | |
766 | int proc_set_async PARAMS ((procinfo *pi)); | |
767 | int proc_unset_async PARAMS ((procinfo *pi)); | |
768 | int proc_stop_process PARAMS ((procinfo *pi)); | |
769 | int proc_trace_signal PARAMS ((procinfo *pi, int signo)); | |
770 | int proc_ignore_signal PARAMS ((procinfo *pi, int signo)); | |
771 | int proc_clear_current_fault PARAMS ((procinfo *pi)); | |
772 | int proc_set_current_signal PARAMS ((procinfo *pi, int signo)); | |
773 | int proc_clear_current_signal PARAMS ((procinfo *pi)); | |
774 | int proc_set_gregs PARAMS ((procinfo *pi)); | |
775 | int proc_set_fpregs PARAMS ((procinfo *pi)); | |
776 | int proc_wait_for_stop PARAMS ((procinfo *pi)); | |
777 | int proc_run_process PARAMS ((procinfo *pi, int step, int signo)); | |
778 | int proc_kill PARAMS ((procinfo *pi, int signo)); | |
779 | int proc_parent_pid PARAMS ((procinfo *pi)); | |
780 | int proc_get_nthreads PARAMS ((procinfo *pi)); | |
781 | int proc_get_current_thread PARAMS ((procinfo *pi)); | |
782 | int proc_set_held_signals PARAMS ((procinfo *pi, sigset_t *sighold)); | |
783 | int proc_set_traced_sysexit PARAMS ((procinfo *pi, sysset_t *sysset)); | |
784 | int proc_set_traced_sysentry PARAMS ((procinfo *pi, sysset_t *sysset)); | |
785 | int proc_set_traced_faults PARAMS ((procinfo *pi, fltset_t *fltset)); | |
786 | int proc_set_traced_signals PARAMS ((procinfo *pi, sigset_t *sigset)); | |
787 | ||
788 | int proc_update_threads PARAMS ((procinfo *pi)); | |
789 | int proc_iterate_over_threads PARAMS ((procinfo *pi, | |
790 | int (*func) PARAMS ((procinfo *, | |
791 | procinfo *, | |
792 | void *)), | |
793 | void *ptr)); | |
794 | ||
795 | gdb_gregset_t *proc_get_gregs PARAMS ((procinfo *pi)); | |
796 | gdb_fpregset_t *proc_get_fpregs PARAMS ((procinfo *pi)); | |
797 | sysset_t *proc_get_traced_sysexit PARAMS ((procinfo *pi, sysset_t *save)); | |
798 | sysset_t *proc_get_traced_sysentry PARAMS ((procinfo *pi, sysset_t *save)); | |
799 | fltset_t *proc_get_traced_faults PARAMS ((procinfo *pi, fltset_t *save)); | |
800 | sigset_t *proc_get_traced_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
801 | sigset_t *proc_get_held_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
802 | sigset_t *proc_get_pending_signals PARAMS ((procinfo *pi, sigset_t *save)); | |
803 | struct sigaction *proc_get_signal_actions PARAMS ((procinfo *pi, | |
804 | struct sigaction *save)); | |
805 | ||
806 | void proc_warn PARAMS ((procinfo *pi, char *func, int line)); | |
807 | void proc_error PARAMS ((procinfo *pi, char *func, int line)); | |
c906108c | 808 | |
c3f6f71d JM |
809 | void |
810 | proc_warn (pi, func, line) | |
811 | procinfo *pi; | |
812 | char *func; | |
813 | int line; | |
814 | { | |
815 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
816 | print_sys_errmsg (errmsg, errno); | |
817 | } | |
c906108c | 818 | |
c3f6f71d JM |
819 | void |
820 | proc_error (pi, func, line) | |
821 | procinfo *pi; | |
822 | char *func; | |
823 | int line; | |
824 | { | |
825 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
826 | perror_with_name (errmsg); | |
827 | } | |
c906108c | 828 | |
c3f6f71d JM |
829 | /* |
830 | * Function: proc_get_status | |
831 | * | |
832 | * Updates the status struct in the procinfo. | |
833 | * There is a 'valid' flag, to let other functions know when | |
834 | * this function needs to be called (so the status is only | |
835 | * read when it is needed). The status file descriptor is | |
836 | * also only opened when it is needed. | |
837 | * | |
838 | * Return: non-zero for success, zero for failure. | |
839 | */ | |
c906108c | 840 | |
c3f6f71d JM |
841 | int |
842 | proc_get_status (pi) | |
843 | procinfo *pi; | |
844 | { | |
845 | /* Status file descriptor is opened "lazily" */ | |
846 | if (pi->status_fd == 0 && | |
847 | open_procinfo_files (pi, FD_STATUS) == 0) | |
848 | { | |
849 | pi->status_valid = 0; | |
850 | return 0; | |
851 | } | |
c906108c | 852 | |
c3f6f71d JM |
853 | #ifdef NEW_PROC_API |
854 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
855 | pi->status_valid = 0; /* fail */ | |
856 | else | |
857 | { | |
858 | /* Sigh... I have to read a different data structure, | |
859 | depending on whether this is a main process or an LWP. */ | |
860 | if (pi->tid) | |
861 | pi->status_valid = (read (pi->status_fd, | |
862 | (char *) &pi->prstatus.pr_lwp, | |
863 | sizeof (lwpstatus_t)) | |
864 | == sizeof (lwpstatus_t)); | |
865 | else | |
866 | { | |
867 | pi->status_valid = (read (pi->status_fd, | |
868 | (char *) &pi->prstatus, | |
869 | sizeof (gdb_prstatus_t)) | |
870 | == sizeof (gdb_prstatus_t)); | |
871 | #if 0 /*def UNIXWARE*/ | |
872 | if (pi->status_valid && | |
873 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
874 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
875 | /* Unixware peculiarity -- read the damn thing again! */ | |
876 | pi->status_valid = (read (pi->status_fd, | |
877 | (char *) &pi->prstatus, | |
878 | sizeof (gdb_prstatus_t)) | |
879 | == sizeof (gdb_prstatus_t)); | |
880 | #endif /* UNIXWARE */ | |
881 | } | |
882 | } | |
883 | #else /* ioctl method */ | |
884 | #ifdef PIOCTSTATUS /* osf */ | |
885 | if (pi->tid == 0) /* main process */ | |
886 | { | |
887 | /* Just read the danged status. Now isn't that simple? */ | |
888 | pi->status_valid = | |
889 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
890 | } | |
891 | else | |
892 | { | |
893 | int win; | |
894 | struct { | |
895 | long pr_count; | |
896 | tid_t pr_error_thread; | |
897 | struct prstatus status; | |
898 | } thread_status; | |
899 | ||
900 | thread_status.pr_count = 1; | |
901 | thread_status.status.pr_tid = pi->tid; | |
902 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
903 | if (win) | |
904 | { | |
905 | memcpy (&pi->prstatus, &thread_status.status, | |
906 | sizeof (pi->prstatus)); | |
907 | pi->status_valid = 1; | |
908 | } | |
909 | } | |
910 | #else | |
911 | /* Just read the danged status. Now isn't that simple? */ | |
912 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
913 | #endif | |
914 | #endif | |
c906108c | 915 | |
c3f6f71d JM |
916 | if (pi->status_valid) |
917 | { | |
918 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
919 | proc_why (pi), | |
920 | proc_what (pi), | |
921 | proc_get_current_thread (pi)); | |
922 | } | |
c906108c | 923 | |
c3f6f71d JM |
924 | /* The status struct includes general regs, so mark them valid too */ |
925 | pi->gregs_valid = pi->status_valid; | |
926 | #ifdef NEW_PROC_API | |
927 | /* In the read/write multiple-fd model, | |
928 | the status struct includes the fp regs too, so mark them valid too */ | |
929 | pi->fpregs_valid = pi->status_valid; | |
930 | #endif | |
931 | return pi->status_valid; /* True if success, false if failure. */ | |
932 | } | |
c906108c | 933 | |
c3f6f71d JM |
934 | /* |
935 | * Function: proc_flags | |
936 | * | |
937 | * returns the process flags (pr_flags field). | |
938 | */ | |
939 | ||
940 | long | |
941 | proc_flags (pi) | |
942 | procinfo *pi; | |
943 | { | |
944 | if (!pi->status_valid) | |
945 | if (!proc_get_status (pi)) | |
946 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 947 | |
c3f6f71d | 948 | #ifdef NEW_PROC_API |
0d06e24b JM |
949 | # ifdef UNIXWARE |
950 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
951 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
952 | The two sets of flags don't overlap. */ | |
953 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
954 | # else | |
c3f6f71d | 955 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 956 | # endif |
c3f6f71d JM |
957 | #else |
958 | return pi->prstatus.pr_flags; | |
959 | #endif | |
960 | } | |
c906108c | 961 | |
c3f6f71d JM |
962 | /* |
963 | * Function: proc_why | |
964 | * | |
965 | * returns the pr_why field (why the process stopped). | |
966 | */ | |
c906108c | 967 | |
c3f6f71d JM |
968 | int |
969 | proc_why (pi) | |
970 | procinfo *pi; | |
971 | { | |
972 | if (!pi->status_valid) | |
973 | if (!proc_get_status (pi)) | |
974 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 975 | |
c3f6f71d JM |
976 | #ifdef NEW_PROC_API |
977 | return pi->prstatus.pr_lwp.pr_why; | |
978 | #else | |
979 | return pi->prstatus.pr_why; | |
980 | #endif | |
981 | } | |
c906108c | 982 | |
c3f6f71d JM |
983 | /* |
984 | * Function: proc_what | |
985 | * | |
986 | * returns the pr_what field (details of why the process stopped). | |
987 | */ | |
c906108c | 988 | |
c3f6f71d JM |
989 | int |
990 | proc_what (pi) | |
991 | procinfo *pi; | |
992 | { | |
993 | if (!pi->status_valid) | |
994 | if (!proc_get_status (pi)) | |
995 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 996 | |
c3f6f71d JM |
997 | #ifdef NEW_PROC_API |
998 | return pi->prstatus.pr_lwp.pr_what; | |
999 | #else | |
1000 | return pi->prstatus.pr_what; | |
c906108c | 1001 | #endif |
c3f6f71d | 1002 | } |
c906108c | 1003 | |
c3f6f71d JM |
1004 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1005 | /* | |
1006 | * Function: proc_nsysarg | |
1007 | * | |
1008 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1009 | */ | |
1010 | ||
1011 | int | |
1012 | proc_nsysarg (pi) | |
1013 | procinfo *pi; | |
1014 | { | |
1015 | if (!pi->status_valid) | |
1016 | if (!proc_get_status (pi)) | |
1017 | return 0; | |
1018 | ||
1019 | #ifdef NEW_PROC_API | |
1020 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1021 | #else | |
1022 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1023 | #endif |
c3f6f71d | 1024 | } |
c906108c | 1025 | |
c3f6f71d JM |
1026 | /* |
1027 | * Function: proc_sysargs | |
1028 | * | |
1029 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1030 | */ | |
c906108c | 1031 | |
c3f6f71d JM |
1032 | long * |
1033 | proc_sysargs (pi) | |
1034 | procinfo *pi; | |
1035 | { | |
1036 | if (!pi->status_valid) | |
1037 | if (!proc_get_status (pi)) | |
1038 | return NULL; | |
1039 | ||
1040 | #ifdef NEW_PROC_API | |
1041 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1042 | #else | |
1043 | return (long *) &pi->prstatus.pr_sysarg; | |
1044 | #endif | |
1045 | } | |
c906108c | 1046 | |
c3f6f71d JM |
1047 | /* |
1048 | * Function: proc_syscall | |
1049 | * | |
1050 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1051 | */ | |
c906108c | 1052 | |
c3f6f71d JM |
1053 | int |
1054 | proc_syscall (pi) | |
1055 | procinfo *pi; | |
1056 | { | |
1057 | if (!pi->status_valid) | |
1058 | if (!proc_get_status (pi)) | |
1059 | return 0; | |
1060 | ||
1061 | #ifdef NEW_PROC_API | |
1062 | return pi->prstatus.pr_lwp.pr_syscall; | |
1063 | #else | |
1064 | return pi->prstatus.pr_syscall; | |
1065 | #endif | |
1066 | } | |
1067 | #endif /* PIOCSSPCACT */ | |
c906108c | 1068 | |
c3f6f71d JM |
1069 | /* |
1070 | * Function: proc_cursig: | |
1071 | * | |
1072 | * returns the pr_cursig field (current signal). | |
1073 | */ | |
c906108c | 1074 | |
c3f6f71d JM |
1075 | long |
1076 | proc_cursig (struct procinfo *pi) | |
1077 | { | |
1078 | if (!pi->status_valid) | |
1079 | if (!proc_get_status (pi)) | |
1080 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1081 | |
c3f6f71d JM |
1082 | #ifdef NEW_PROC_API |
1083 | return pi->prstatus.pr_lwp.pr_cursig; | |
1084 | #else | |
1085 | return pi->prstatus.pr_cursig; | |
1086 | #endif | |
1087 | } | |
c906108c | 1088 | |
c3f6f71d | 1089 | /* |
0d06e24b | 1090 | * Function: proc_modify_flag |
c3f6f71d JM |
1091 | * |
1092 | * === I appologize for the messiness of this function. | |
1093 | * === This is an area where the different versions of | |
1094 | * === /proc are more inconsistent than usual. MVS | |
1095 | * | |
1096 | * Set or reset any of the following process flags: | |
1097 | * PR_FORK -- forked child will inherit trace flags | |
1098 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1099 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1100 | * PR_ASYNC -- LWP's get to run/stop independently. |
1101 | * | |
1102 | * There are three methods for doing this function: | |
1103 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1104 | * [Sol6, Sol7, UW] | |
1105 | * 2) Middle: PIOCSET/PIOCRESET | |
1106 | * [Irix, Sol5] | |
1107 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1108 | * [OSF, Sol5] | |
1109 | * | |
1110 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1111 | * Note: OSF does not define PR_KLC. |
1112 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d JM |
1113 | * |
1114 | * Arguments: | |
1115 | * pi -- the procinfo | |
1116 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1117 | * mode -- 1 for set, 0 for reset. | |
1118 | * | |
1119 | * Returns non-zero for success, zero for failure. | |
1120 | */ | |
c906108c | 1121 | |
c3f6f71d | 1122 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1123 | |
c3f6f71d JM |
1124 | static int |
1125 | proc_modify_flag (pi, flag, mode) | |
1126 | procinfo *pi; | |
1127 | long flag; | |
1128 | long mode; | |
1129 | { | |
1130 | long win = 0; /* default to fail */ | |
1131 | ||
1132 | /* | |
1133 | * These operations affect the process as a whole, and applying | |
1134 | * them to an individual LWP has the same meaning as applying them | |
1135 | * to the main process. Therefore, if we're ever called with a | |
1136 | * pointer to an LWP's procinfo, let's substitute the process's | |
1137 | * procinfo and avoid opening the LWP's file descriptor | |
1138 | * unnecessarily. | |
1139 | */ | |
1140 | ||
1141 | if (pi->pid != 0) | |
1142 | pi = find_procinfo_or_die (pi->pid, 0); | |
1143 | ||
1144 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
1145 | /* First normalize the PCUNSET/PCRESET command opcode | |
1146 | (which for no obvious reason has a different definition | |
1147 | from one operating system to the next...) */ | |
1148 | #ifdef PCUNSET | |
1149 | #define GDBRESET PCUNSET | |
1150 | #endif | |
1151 | #ifdef PCRESET | |
1152 | #define GDBRESET PCRESET | |
c906108c | 1153 | #endif |
c3f6f71d JM |
1154 | { |
1155 | long arg[2]; | |
c906108c | 1156 | |
c3f6f71d JM |
1157 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1158 | arg[0] = PCSET; | |
1159 | else /* Reset the flag */ | |
1160 | arg[0] = GDBRESET; | |
c5aa993b | 1161 | |
c3f6f71d JM |
1162 | arg[1] = flag; |
1163 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1164 | } | |
1165 | #else | |
1166 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1167 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1168 | { | |
1169 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1170 | } | |
1171 | else /* Reset the flag */ | |
1172 | { | |
1173 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1174 | } | |
c906108c | 1175 | |
c3f6f71d JM |
1176 | #else |
1177 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1178 | switch (flag) { | |
1179 | case PR_RLC: | |
1180 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1181 | { | |
1182 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1183 | } | |
1184 | else /* Clear run-on-last-close */ | |
1185 | { | |
1186 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1187 | } | |
1188 | break; | |
1189 | case PR_FORK: | |
1190 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1191 | { | |
1192 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1193 | } | |
1194 | else /* Clear inherit-on-fork */ | |
1195 | { | |
1196 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1197 | } | |
1198 | break; | |
1199 | default: | |
1200 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1201 | break; | |
1202 | } | |
1203 | #endif | |
1204 | #endif | |
1205 | #endif | |
1206 | #undef GDBRESET | |
1207 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1208 | pi->status_valid = 0; | |
c906108c | 1209 | |
c3f6f71d JM |
1210 | if (!win) |
1211 | warning ("procfs: modify_flag failed to turn %s %s", | |
1212 | flag == PR_FORK ? "PR_FORK" : | |
1213 | flag == PR_RLC ? "PR_RLC" : | |
1214 | #ifdef PR_ASYNC | |
1215 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1216 | #endif |
1217 | #ifdef PR_KLC | |
1218 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1219 | #endif |
1220 | "<unknown flag>", | |
1221 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1222 | |
c3f6f71d JM |
1223 | return win; |
1224 | } | |
c906108c | 1225 | |
c3f6f71d JM |
1226 | /* |
1227 | * Function: proc_set_run_on_last_close | |
1228 | * | |
1229 | * Set the run_on_last_close flag. | |
1230 | * Process with all threads will become runnable | |
1231 | * when debugger closes all /proc fds. | |
1232 | * | |
1233 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1234 | */ |
1235 | ||
c3f6f71d JM |
1236 | int |
1237 | proc_set_run_on_last_close (pi) | |
1238 | procinfo *pi; | |
c906108c | 1239 | { |
c3f6f71d JM |
1240 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1241 | } | |
c906108c | 1242 | |
c3f6f71d JM |
1243 | /* |
1244 | * Function: proc_unset_run_on_last_close | |
1245 | * | |
1246 | * Reset the run_on_last_close flag. | |
1247 | * Process will NOT become runnable | |
1248 | * when debugger closes its file handles. | |
1249 | * | |
1250 | * Returns non-zero for success, zero for failure. | |
1251 | */ | |
c906108c | 1252 | |
c3f6f71d JM |
1253 | int |
1254 | proc_unset_run_on_last_close (pi) | |
1255 | procinfo *pi; | |
1256 | { | |
1257 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1258 | } |
1259 | ||
0d06e24b JM |
1260 | #ifdef PR_KLC |
1261 | /* | |
1262 | * Function: proc_set_kill_on_last_close | |
1263 | * | |
1264 | * Set the kill_on_last_close flag. | |
1265 | * Process with all threads will be killed when debugger | |
1266 | * closes all /proc fds (or debugger exits or dies). | |
1267 | * | |
1268 | * Returns non-zero for success, zero for failure. | |
1269 | */ | |
1270 | ||
1271 | int | |
1272 | proc_set_kill_on_last_close (pi) | |
1273 | procinfo *pi; | |
1274 | { | |
1275 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * Function: proc_unset_kill_on_last_close | |
1280 | * | |
1281 | * Reset the kill_on_last_close flag. | |
1282 | * Process will NOT be killed when debugger | |
1283 | * closes its file handles (or exits or dies). | |
1284 | * | |
1285 | * Returns non-zero for success, zero for failure. | |
1286 | */ | |
1287 | ||
1288 | int | |
1289 | proc_unset_kill_on_last_close (pi) | |
1290 | procinfo *pi; | |
1291 | { | |
1292 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1293 | } | |
1294 | #endif /* PR_KLC */ | |
1295 | ||
c906108c | 1296 | /* |
c3f6f71d JM |
1297 | * Function: proc_set_inherit_on_fork |
1298 | * | |
1299 | * Set inherit_on_fork flag. | |
1300 | * If the process forks a child while we are registered for events | |
1301 | * in the parent, then we will also recieve events from the child. | |
1302 | * | |
1303 | * Returns non-zero for success, zero for failure. | |
1304 | */ | |
c906108c | 1305 | |
c3f6f71d JM |
1306 | int |
1307 | proc_set_inherit_on_fork (pi) | |
1308 | procinfo *pi; | |
1309 | { | |
1310 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1311 | } | |
c5aa993b | 1312 | |
c3f6f71d JM |
1313 | /* |
1314 | * Function: proc_unset_inherit_on_fork | |
1315 | * | |
1316 | * Reset inherit_on_fork flag. | |
1317 | * If the process forks a child while we are registered for events | |
1318 | * in the parent, then we will NOT recieve events from the child. | |
1319 | * | |
1320 | * Returns non-zero for success, zero for failure. | |
1321 | */ | |
c906108c | 1322 | |
c3f6f71d JM |
1323 | int |
1324 | proc_unset_inherit_on_fork (pi) | |
1325 | procinfo *pi; | |
1326 | { | |
1327 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1328 | } | |
c906108c | 1329 | |
c3f6f71d JM |
1330 | #ifdef PR_ASYNC |
1331 | /* | |
1332 | * Function: proc_set_async | |
1333 | * | |
1334 | * Set PR_ASYNC flag. | |
1335 | * If one LWP stops because of a debug event (signal etc.), | |
1336 | * the remaining LWPs will continue to run. | |
1337 | * | |
1338 | * Returns non-zero for success, zero for failure. | |
1339 | */ | |
c906108c | 1340 | |
c3f6f71d JM |
1341 | int |
1342 | proc_set_async (pi) | |
1343 | procinfo *pi; | |
1344 | { | |
1345 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1346 | } | |
c906108c | 1347 | |
c3f6f71d JM |
1348 | /* |
1349 | * Function: proc_unset_async | |
1350 | * | |
1351 | * Reset PR_ASYNC flag. | |
1352 | * If one LWP stops because of a debug event (signal etc.), | |
1353 | * then all other LWPs will stop as well. | |
1354 | * | |
1355 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1356 | */ |
1357 | ||
c3f6f71d JM |
1358 | int |
1359 | proc_unset_async (pi) | |
1360 | procinfo *pi; | |
1361 | { | |
1362 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1363 | } | |
1364 | #endif /* PR_ASYNC */ | |
c906108c SS |
1365 | |
1366 | /* | |
c3f6f71d JM |
1367 | * Function: proc_stop_process |
1368 | * | |
1369 | * Request the process/LWP to stop. Does not wait. | |
1370 | * Returns non-zero for success, zero for failure. | |
1371 | */ | |
c906108c | 1372 | |
c3f6f71d JM |
1373 | int |
1374 | proc_stop_process (pi) | |
1375 | procinfo *pi; | |
1376 | { | |
1377 | int win; | |
c906108c | 1378 | |
c3f6f71d JM |
1379 | /* |
1380 | * We might conceivably apply this operation to an LWP, and | |
1381 | * the LWP's ctl file descriptor might not be open. | |
1382 | */ | |
c906108c | 1383 | |
c3f6f71d JM |
1384 | if (pi->ctl_fd == 0 && |
1385 | open_procinfo_files (pi, FD_CTL) == 0) | |
1386 | return 0; | |
1387 | else | |
1388 | { | |
1389 | #ifdef NEW_PROC_API | |
1390 | int cmd = PCSTOP; | |
1391 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1392 | #else /* ioctl method */ | |
1393 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1394 | /* Note: the call also reads the prstatus. */ | |
1395 | if (win) | |
1396 | { | |
1397 | pi->status_valid = 1; | |
1398 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1399 | proc_why (pi), | |
1400 | proc_what (pi), | |
1401 | proc_get_current_thread (pi)); | |
1402 | } | |
1403 | #endif | |
1404 | } | |
c906108c | 1405 | |
c3f6f71d JM |
1406 | return win; |
1407 | } | |
c5aa993b | 1408 | |
c3f6f71d JM |
1409 | /* |
1410 | * Function: proc_wait_for_stop | |
1411 | * | |
1412 | * Wait for the process or LWP to stop (block until it does). | |
1413 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1414 | */ |
1415 | ||
c3f6f71d JM |
1416 | int |
1417 | proc_wait_for_stop (pi) | |
1418 | procinfo *pi; | |
c906108c | 1419 | { |
c3f6f71d JM |
1420 | int win; |
1421 | ||
1422 | /* | |
1423 | * We should never have to apply this operation to any procinfo | |
1424 | * except the one for the main process. If that ever changes | |
1425 | * for any reason, then take out the following clause and | |
1426 | * replace it with one that makes sure the ctl_fd is open. | |
1427 | */ | |
1428 | ||
1429 | if (pi->tid != 0) | |
1430 | pi = find_procinfo_or_die (pi->pid, 0); | |
1431 | ||
1432 | #ifdef NEW_PROC_API | |
1433 | { | |
1434 | int cmd = PCWSTOP; | |
1435 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1436 | /* We been runnin' and we stopped -- need to update status. */ | |
1437 | pi->status_valid = 0; | |
1438 | } | |
1439 | #else /* ioctl method */ | |
1440 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1441 | /* Above call also refreshes the prstatus. */ | |
1442 | if (win) | |
1443 | { | |
1444 | pi->status_valid = 1; | |
1445 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), | |
1446 | proc_why (pi), | |
1447 | proc_what (pi), | |
1448 | proc_get_current_thread (pi)); | |
1449 | } | |
c906108c SS |
1450 | #endif |
1451 | ||
c3f6f71d | 1452 | return win; |
c906108c SS |
1453 | } |
1454 | ||
1455 | /* | |
c3f6f71d JM |
1456 | * Function: proc_run_process |
1457 | * | |
1458 | * Make the process or LWP runnable. | |
1459 | * Options (not all are implemented): | |
1460 | * - single-step | |
1461 | * - clear current fault | |
1462 | * - clear current signal | |
1463 | * - abort the current system call | |
1464 | * - stop as soon as finished with system call | |
1465 | * - (ioctl): set traced signal set | |
1466 | * - (ioctl): set held signal set | |
1467 | * - (ioctl): set traced fault set | |
1468 | * - (ioctl): set start pc (vaddr) | |
1469 | * Always clear the current fault. | |
1470 | * Clear the current signal if 'signo' is zero. | |
1471 | * | |
1472 | * Arguments: | |
1473 | * pi the process or LWP to operate on. | |
1474 | * step if true, set the process or LWP to trap after one instr. | |
1475 | * signo if zero, clear the current signal if any. | |
1476 | * if non-zero, set the current signal to this one. | |
1477 | * | |
1478 | * Returns non-zero for success, zero for failure. | |
1479 | */ | |
1480 | ||
1481 | int | |
1482 | proc_run_process (pi, step, signo) | |
1483 | procinfo *pi; | |
1484 | int step; | |
1485 | int signo; | |
1486 | { | |
1487 | int win; | |
1488 | int runflags; | |
1489 | ||
1490 | /* | |
1491 | * We will probably have to apply this operation to individual threads, | |
1492 | * so make sure the control file descriptor is open. | |
1493 | */ | |
1494 | ||
1495 | if (pi->ctl_fd == 0 && | |
1496 | open_procinfo_files (pi, FD_CTL) == 0) | |
1497 | { | |
1498 | return 0; | |
1499 | } | |
c906108c | 1500 | |
c3f6f71d JM |
1501 | runflags = PRCFAULT; /* always clear current fault */ |
1502 | if (step) | |
1503 | runflags |= PRSTEP; | |
1504 | if (signo == 0) | |
1505 | runflags |= PRCSIG; | |
1506 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1507 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1508 | |
c3f6f71d JM |
1509 | #ifdef NEW_PROC_API |
1510 | { | |
1511 | int cmd[2]; | |
c906108c | 1512 | |
c3f6f71d JM |
1513 | cmd[0] = PCRUN; |
1514 | cmd[1] = runflags; | |
1515 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1516 | } | |
1517 | #else /* ioctl method */ | |
1518 | { | |
1519 | prrun_t prrun; | |
c906108c | 1520 | |
c3f6f71d JM |
1521 | memset (&prrun, 0, sizeof (prrun)); |
1522 | prrun.pr_flags = runflags; | |
1523 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1524 | } | |
1525 | #endif | |
c906108c | 1526 | |
c3f6f71d JM |
1527 | return win; |
1528 | } | |
c906108c | 1529 | |
c3f6f71d JM |
1530 | /* |
1531 | * Function: proc_set_traced_signals | |
1532 | * | |
1533 | * Register to trace signals in the process or LWP. | |
1534 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1535 | */ |
1536 | ||
c3f6f71d JM |
1537 | int |
1538 | proc_set_traced_signals (pi, sigset) | |
1539 | procinfo *pi; | |
1540 | sigset_t *sigset; | |
c906108c | 1541 | { |
c3f6f71d JM |
1542 | int win; |
1543 | ||
1544 | /* | |
1545 | * We should never have to apply this operation to any procinfo | |
1546 | * except the one for the main process. If that ever changes | |
1547 | * for any reason, then take out the following clause and | |
1548 | * replace it with one that makes sure the ctl_fd is open. | |
1549 | */ | |
1550 | ||
1551 | if (pi->tid != 0) | |
1552 | pi = find_procinfo_or_die (pi->pid, 0); | |
1553 | ||
1554 | #ifdef NEW_PROC_API | |
1555 | { | |
1556 | struct { | |
1557 | int cmd; | |
1558 | /* Use char array to avoid alignment issues. */ | |
1559 | char sigset[sizeof (sigset_t)]; | |
1560 | } arg; | |
c906108c | 1561 | |
c3f6f71d JM |
1562 | arg.cmd = PCSTRACE; |
1563 | memcpy (&arg.sigset, sigset, sizeof (sigset_t)); | |
c906108c | 1564 | |
c3f6f71d JM |
1565 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1566 | } | |
1567 | #else /* ioctl method */ | |
1568 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1569 | #endif | |
1570 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1571 | pi->status_valid = 0; | |
c906108c | 1572 | |
c3f6f71d JM |
1573 | if (!win) |
1574 | warning ("procfs: set_traced_signals failed"); | |
1575 | return win; | |
c906108c SS |
1576 | } |
1577 | ||
1578 | /* | |
c3f6f71d JM |
1579 | * Function: proc_set_traced_faults |
1580 | * | |
1581 | * Register to trace hardware faults in the process or LWP. | |
1582 | * Returns non-zero for success, zero for failure. | |
1583 | */ | |
c906108c | 1584 | |
c3f6f71d JM |
1585 | int |
1586 | proc_set_traced_faults (pi, fltset) | |
1587 | procinfo *pi; | |
1588 | fltset_t *fltset; | |
1589 | { | |
1590 | int win; | |
1591 | ||
1592 | /* | |
1593 | * We should never have to apply this operation to any procinfo | |
1594 | * except the one for the main process. If that ever changes | |
1595 | * for any reason, then take out the following clause and | |
1596 | * replace it with one that makes sure the ctl_fd is open. | |
1597 | */ | |
1598 | ||
1599 | if (pi->tid != 0) | |
1600 | pi = find_procinfo_or_die (pi->pid, 0); | |
1601 | ||
1602 | #ifdef NEW_PROC_API | |
1603 | { | |
1604 | struct { | |
1605 | int cmd; | |
1606 | /* Use char array to avoid alignment issues. */ | |
1607 | char fltset[sizeof (fltset_t)]; | |
1608 | } arg; | |
c906108c | 1609 | |
c3f6f71d JM |
1610 | arg.cmd = PCSFAULT; |
1611 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1612 | |
c3f6f71d JM |
1613 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1614 | } | |
1615 | #else /* ioctl method */ | |
1616 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1617 | #endif | |
1618 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1619 | pi->status_valid = 0; | |
c906108c | 1620 | |
c3f6f71d JM |
1621 | return win; |
1622 | } | |
c5aa993b | 1623 | |
c3f6f71d JM |
1624 | /* |
1625 | * Function: proc_set_traced_sysentry | |
1626 | * | |
1627 | * Register to trace entry to system calls in the process or LWP. | |
1628 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1629 | */ |
1630 | ||
c3f6f71d JM |
1631 | int |
1632 | proc_set_traced_sysentry (pi, sysset) | |
1633 | procinfo *pi; | |
1634 | sysset_t *sysset; | |
c906108c | 1635 | { |
c3f6f71d JM |
1636 | int win; |
1637 | ||
1638 | /* | |
1639 | * We should never have to apply this operation to any procinfo | |
1640 | * except the one for the main process. If that ever changes | |
1641 | * for any reason, then take out the following clause and | |
1642 | * replace it with one that makes sure the ctl_fd is open. | |
1643 | */ | |
1644 | ||
1645 | if (pi->tid != 0) | |
1646 | pi = find_procinfo_or_die (pi->pid, 0); | |
1647 | ||
1648 | #ifdef NEW_PROC_API | |
1649 | { | |
1650 | struct { | |
1651 | int cmd; | |
1652 | /* Use char array to avoid alignment issues. */ | |
1653 | char sysset[sizeof (sysset_t)]; | |
1654 | } arg; | |
1655 | ||
1656 | arg.cmd = PCSENTRY; | |
1657 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
1658 | ||
1659 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); | |
1660 | } | |
1661 | #else /* ioctl method */ | |
1662 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1663 | #endif | |
1664 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1665 | pi->status_valid = 0; | |
1666 | ||
1667 | return win; | |
c906108c SS |
1668 | } |
1669 | ||
1670 | /* | |
c3f6f71d JM |
1671 | * Function: proc_set_traced_sysexit |
1672 | * | |
1673 | * Register to trace exit from system calls in the process or LWP. | |
1674 | * Returns non-zero for success, zero for failure. | |
1675 | */ | |
c906108c | 1676 | |
c3f6f71d JM |
1677 | int |
1678 | proc_set_traced_sysexit (pi, sysset) | |
1679 | procinfo *pi; | |
1680 | sysset_t *sysset; | |
1681 | { | |
1682 | int win; | |
1683 | ||
1684 | /* | |
1685 | * We should never have to apply this operation to any procinfo | |
1686 | * except the one for the main process. If that ever changes | |
1687 | * for any reason, then take out the following clause and | |
1688 | * replace it with one that makes sure the ctl_fd is open. | |
1689 | */ | |
1690 | ||
1691 | if (pi->tid != 0) | |
1692 | pi = find_procinfo_or_die (pi->pid, 0); | |
1693 | ||
1694 | #ifdef NEW_PROC_API | |
1695 | { | |
1696 | struct { | |
1697 | int cmd; | |
1698 | /* Use char array to avoid alignment issues. */ | |
1699 | char sysset[sizeof (sysset_t)]; | |
1700 | } arg; | |
c906108c | 1701 | |
c3f6f71d JM |
1702 | arg.cmd = PCSEXIT; |
1703 | memcpy (&arg.sysset, sysset, sizeof (sysset_t)); | |
c906108c | 1704 | |
c3f6f71d JM |
1705 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1706 | } | |
1707 | #else /* ioctl method */ | |
1708 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1709 | #endif | |
1710 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1711 | pi->status_valid = 0; | |
c906108c | 1712 | |
c3f6f71d JM |
1713 | return win; |
1714 | } | |
c906108c | 1715 | |
c3f6f71d JM |
1716 | /* |
1717 | * Function: proc_set_held_signals | |
1718 | * | |
1719 | * Specify the set of blocked / held signals in the process or LWP. | |
1720 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1721 | */ |
1722 | ||
c3f6f71d JM |
1723 | int |
1724 | proc_set_held_signals (pi, sighold) | |
1725 | procinfo *pi; | |
1726 | sigset_t *sighold; | |
c906108c | 1727 | { |
c3f6f71d JM |
1728 | int win; |
1729 | ||
1730 | /* | |
1731 | * We should never have to apply this operation to any procinfo | |
1732 | * except the one for the main process. If that ever changes | |
1733 | * for any reason, then take out the following clause and | |
1734 | * replace it with one that makes sure the ctl_fd is open. | |
1735 | */ | |
1736 | ||
1737 | if (pi->tid != 0) | |
1738 | pi = find_procinfo_or_die (pi->pid, 0); | |
1739 | ||
1740 | #ifdef NEW_PROC_API | |
1741 | { | |
1742 | struct { | |
1743 | int cmd; | |
1744 | /* Use char array to avoid alignment issues. */ | |
1745 | char hold[sizeof (sigset_t)]; | |
1746 | } arg; | |
1747 | ||
1748 | arg.cmd = PCSHOLD; | |
1749 | memcpy (&arg.hold, sighold, sizeof (sigset_t)); | |
1750 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1751 | } | |
c906108c | 1752 | #else |
c3f6f71d | 1753 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1754 | #endif |
c3f6f71d JM |
1755 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
1756 | pi->status_valid = 0; | |
1757 | ||
1758 | return win; | |
c906108c SS |
1759 | } |
1760 | ||
1761 | /* | |
c3f6f71d JM |
1762 | * Function: proc_get_pending_signals |
1763 | * | |
1764 | * returns the set of signals that are pending in the process or LWP. | |
1765 | * Will also copy the sigset if 'save' is non-zero. | |
1766 | */ | |
c906108c | 1767 | |
c3f6f71d JM |
1768 | sigset_t * |
1769 | proc_get_pending_signals (pi, save) | |
1770 | procinfo *pi; | |
1771 | sigset_t *save; | |
1772 | { | |
1773 | sigset_t *ret = NULL; | |
1774 | ||
1775 | /* | |
1776 | * We should never have to apply this operation to any procinfo | |
1777 | * except the one for the main process. If that ever changes | |
1778 | * for any reason, then take out the following clause and | |
1779 | * replace it with one that makes sure the ctl_fd is open. | |
1780 | */ | |
1781 | ||
1782 | if (pi->tid != 0) | |
1783 | pi = find_procinfo_or_die (pi->pid, 0); | |
1784 | ||
1785 | if (!pi->status_valid) | |
1786 | if (!proc_get_status (pi)) | |
1787 | return NULL; | |
1788 | ||
1789 | #ifdef NEW_PROC_API | |
1790 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1791 | #else | |
1792 | ret = &pi->prstatus.pr_sigpend; | |
1793 | #endif | |
1794 | if (save && ret) | |
1795 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1796 | |
c3f6f71d JM |
1797 | return ret; |
1798 | } | |
c906108c | 1799 | |
c3f6f71d JM |
1800 | /* |
1801 | * Function: proc_get_signal_actions | |
1802 | * | |
1803 | * returns the set of signal actions. | |
1804 | * Will also copy the sigactionset if 'save' is non-zero. | |
1805 | */ | |
c906108c | 1806 | |
c3f6f71d JM |
1807 | struct sigaction * |
1808 | proc_get_signal_actions (pi, save) | |
1809 | procinfo *pi; | |
1810 | struct sigaction *save; | |
1811 | { | |
1812 | struct sigaction *ret = NULL; | |
1813 | ||
1814 | /* | |
1815 | * We should never have to apply this operation to any procinfo | |
1816 | * except the one for the main process. If that ever changes | |
1817 | * for any reason, then take out the following clause and | |
1818 | * replace it with one that makes sure the ctl_fd is open. | |
1819 | */ | |
1820 | ||
1821 | if (pi->tid != 0) | |
1822 | pi = find_procinfo_or_die (pi->pid, 0); | |
1823 | ||
1824 | if (!pi->status_valid) | |
1825 | if (!proc_get_status (pi)) | |
1826 | return NULL; | |
1827 | ||
1828 | #ifdef NEW_PROC_API | |
1829 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1830 | #else | |
1831 | ret = &pi->prstatus.pr_action; | |
1832 | #endif | |
1833 | if (save && ret) | |
1834 | memcpy (save, ret, sizeof (struct sigaction)); | |
c906108c | 1835 | |
c3f6f71d JM |
1836 | return ret; |
1837 | } | |
c5aa993b | 1838 | |
c3f6f71d JM |
1839 | /* |
1840 | * Function: proc_get_held_signals | |
1841 | * | |
1842 | * returns the set of signals that are held / blocked. | |
1843 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
1844 | */ |
1845 | ||
c3f6f71d JM |
1846 | sigset_t * |
1847 | proc_get_held_signals (pi, save) | |
1848 | procinfo *pi; | |
1849 | sigset_t *save; | |
c906108c | 1850 | { |
c3f6f71d JM |
1851 | sigset_t *ret = NULL; |
1852 | ||
1853 | /* | |
1854 | * We should never have to apply this operation to any procinfo | |
1855 | * except the one for the main process. If that ever changes | |
1856 | * for any reason, then take out the following clause and | |
1857 | * replace it with one that makes sure the ctl_fd is open. | |
1858 | */ | |
1859 | ||
1860 | if (pi->tid != 0) | |
1861 | pi = find_procinfo_or_die (pi->pid, 0); | |
1862 | ||
1863 | #ifdef NEW_PROC_API | |
1864 | if (!pi->status_valid) | |
1865 | if (!proc_get_status (pi)) | |
1866 | return NULL; | |
1867 | ||
1868 | #ifdef UNIXWARE | |
1869 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1870 | #else |
c3f6f71d JM |
1871 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1872 | #endif /* UNIXWARE */ | |
1873 | #else /* not NEW_PROC_API */ | |
1874 | { | |
1875 | static sigset_t sigheld; | |
1876 | ||
1877 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1878 | ret = &sigheld; | |
1879 | } | |
1880 | #endif /* NEW_PROC_API */ | |
1881 | if (save && ret) | |
1882 | memcpy (save, ret, sizeof (sigset_t)); | |
1883 | ||
1884 | return ret; | |
c906108c SS |
1885 | } |
1886 | ||
c3f6f71d JM |
1887 | /* |
1888 | * Function: proc_get_traced_signals | |
1889 | * | |
1890 | * returns the set of signals that are traced / debugged. | |
1891 | * Will also copy the sigset if 'save' is non-zero. | |
1892 | */ | |
1893 | ||
1894 | sigset_t * | |
1895 | proc_get_traced_signals (pi, save) | |
1896 | procinfo *pi; | |
1897 | sigset_t *save; | |
c906108c | 1898 | { |
c3f6f71d JM |
1899 | sigset_t *ret = NULL; |
1900 | ||
1901 | /* | |
1902 | * We should never have to apply this operation to any procinfo | |
1903 | * except the one for the main process. If that ever changes | |
1904 | * for any reason, then take out the following clause and | |
1905 | * replace it with one that makes sure the ctl_fd is open. | |
1906 | */ | |
1907 | ||
1908 | if (pi->tid != 0) | |
1909 | pi = find_procinfo_or_die (pi->pid, 0); | |
1910 | ||
1911 | #ifdef NEW_PROC_API | |
1912 | if (!pi->status_valid) | |
1913 | if (!proc_get_status (pi)) | |
1914 | return NULL; | |
1915 | ||
1916 | ret = &pi->prstatus.pr_sigtrace; | |
1917 | #else | |
1918 | { | |
1919 | static sigset_t sigtrace; | |
1920 | ||
1921 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1922 | ret = &sigtrace; | |
1923 | } | |
c906108c | 1924 | #endif |
c3f6f71d JM |
1925 | if (save && ret) |
1926 | memcpy (save, ret, sizeof (sigset_t)); | |
c906108c | 1927 | |
c3f6f71d JM |
1928 | return ret; |
1929 | } | |
c906108c | 1930 | |
c3f6f71d JM |
1931 | /* |
1932 | * Function: proc_trace_signal | |
1933 | * | |
1934 | * Add 'signo' to the set of signals that are traced. | |
1935 | * Returns non-zero for success, zero for failure. | |
1936 | */ | |
c906108c | 1937 | |
c3f6f71d JM |
1938 | int |
1939 | proc_trace_signal (pi, signo) | |
1940 | procinfo *pi; | |
1941 | int signo; | |
1942 | { | |
1943 | sigset_t temp; | |
1944 | ||
1945 | /* | |
1946 | * We should never have to apply this operation to any procinfo | |
1947 | * except the one for the main process. If that ever changes | |
1948 | * for any reason, then take out the following clause and | |
1949 | * replace it with one that makes sure the ctl_fd is open. | |
1950 | */ | |
1951 | ||
1952 | if (pi->tid != 0) | |
1953 | pi = find_procinfo_or_die (pi->pid, 0); | |
1954 | ||
1955 | if (pi) | |
c906108c | 1956 | { |
c3f6f71d | 1957 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1958 | { |
c3f6f71d JM |
1959 | praddset (&temp, signo); |
1960 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
1961 | } |
1962 | } | |
c5aa993b | 1963 | |
c3f6f71d JM |
1964 | return 0; /* failure */ |
1965 | } | |
c906108c | 1966 | |
c3f6f71d JM |
1967 | /* |
1968 | * Function: proc_ignore_signal | |
1969 | * | |
1970 | * Remove 'signo' from the set of signals that are traced. | |
1971 | * Returns non-zero for success, zero for failure. | |
1972 | */ | |
c906108c | 1973 | |
c3f6f71d JM |
1974 | int |
1975 | proc_ignore_signal (pi, signo) | |
1976 | procinfo *pi; | |
1977 | int signo; | |
1978 | { | |
1979 | sigset_t temp; | |
1980 | ||
1981 | /* | |
1982 | * We should never have to apply this operation to any procinfo | |
1983 | * except the one for the main process. If that ever changes | |
1984 | * for any reason, then take out the following clause and | |
1985 | * replace it with one that makes sure the ctl_fd is open. | |
1986 | */ | |
1987 | ||
1988 | if (pi->tid != 0) | |
1989 | pi = find_procinfo_or_die (pi->pid, 0); | |
1990 | ||
1991 | if (pi) | |
c906108c | 1992 | { |
c3f6f71d | 1993 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 1994 | { |
c3f6f71d JM |
1995 | prdelset (&temp, signo); |
1996 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 1997 | } |
c906108c | 1998 | } |
c906108c | 1999 | |
c3f6f71d | 2000 | return 0; /* failure */ |
c906108c SS |
2001 | } |
2002 | ||
2003 | /* | |
c3f6f71d JM |
2004 | * Function: proc_get_traced_faults |
2005 | * | |
2006 | * returns the set of hardware faults that are traced /debugged. | |
2007 | * Will also copy the faultset if 'save' is non-zero. | |
2008 | */ | |
2009 | ||
2010 | fltset_t * | |
2011 | proc_get_traced_faults (pi, save) | |
2012 | procinfo *pi; | |
2013 | fltset_t *save; | |
2014 | { | |
2015 | fltset_t *ret = NULL; | |
2016 | ||
2017 | /* | |
2018 | * We should never have to apply this operation to any procinfo | |
2019 | * except the one for the main process. If that ever changes | |
2020 | * for any reason, then take out the following clause and | |
2021 | * replace it with one that makes sure the ctl_fd is open. | |
2022 | */ | |
2023 | ||
2024 | if (pi->tid != 0) | |
2025 | pi = find_procinfo_or_die (pi->pid, 0); | |
2026 | ||
2027 | #ifdef NEW_PROC_API | |
2028 | if (!pi->status_valid) | |
2029 | if (!proc_get_status (pi)) | |
2030 | return NULL; | |
2031 | ||
2032 | ret = &pi->prstatus.pr_flttrace; | |
2033 | #else | |
2034 | { | |
2035 | static fltset_t flttrace; | |
2036 | ||
2037 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2038 | ret = &flttrace; | |
2039 | } | |
2040 | #endif | |
2041 | if (save && ret) | |
2042 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2043 | |
c3f6f71d JM |
2044 | return ret; |
2045 | } | |
c906108c | 2046 | |
c3f6f71d JM |
2047 | /* |
2048 | * Function: proc_get_traced_sysentry | |
2049 | * | |
2050 | * returns the set of syscalls that are traced /debugged on entry. | |
2051 | * Will also copy the syscall set if 'save' is non-zero. | |
2052 | */ | |
c906108c | 2053 | |
c3f6f71d JM |
2054 | sysset_t * |
2055 | proc_get_traced_sysentry (pi, save) | |
2056 | procinfo *pi; | |
2057 | sysset_t *save; | |
2058 | { | |
2059 | sysset_t *ret = NULL; | |
2060 | ||
2061 | /* | |
2062 | * We should never have to apply this operation to any procinfo | |
2063 | * except the one for the main process. If that ever changes | |
2064 | * for any reason, then take out the following clause and | |
2065 | * replace it with one that makes sure the ctl_fd is open. | |
2066 | */ | |
2067 | ||
2068 | if (pi->tid != 0) | |
2069 | pi = find_procinfo_or_die (pi->pid, 0); | |
2070 | ||
2071 | #ifdef NEW_PROC_API | |
2072 | if (!pi->status_valid) | |
2073 | if (!proc_get_status (pi)) | |
2074 | return NULL; | |
2075 | ||
2076 | ret = &pi->prstatus.pr_sysentry; | |
2077 | #else | |
2078 | { | |
2079 | static sysset_t sysentry; | |
c906108c | 2080 | |
c3f6f71d JM |
2081 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2082 | ret = &sysentry; | |
2083 | } | |
2084 | #endif | |
2085 | if (save && ret) | |
2086 | memcpy (save, ret, sizeof (sysset_t)); | |
c906108c | 2087 | |
c3f6f71d JM |
2088 | return ret; |
2089 | } | |
c5aa993b | 2090 | |
c3f6f71d JM |
2091 | /* |
2092 | * Function: proc_get_traced_sysexit | |
2093 | * | |
2094 | * returns the set of syscalls that are traced /debugged on exit. | |
2095 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2096 | */ |
2097 | ||
c3f6f71d JM |
2098 | sysset_t * |
2099 | proc_get_traced_sysexit (pi, save) | |
2100 | procinfo *pi; | |
2101 | sysset_t *save; | |
c906108c | 2102 | { |
c3f6f71d JM |
2103 | sysset_t * ret = NULL; |
2104 | ||
2105 | /* | |
2106 | * We should never have to apply this operation to any procinfo | |
2107 | * except the one for the main process. If that ever changes | |
2108 | * for any reason, then take out the following clause and | |
2109 | * replace it with one that makes sure the ctl_fd is open. | |
2110 | */ | |
2111 | ||
2112 | if (pi->tid != 0) | |
2113 | pi = find_procinfo_or_die (pi->pid, 0); | |
2114 | ||
2115 | #ifdef NEW_PROC_API | |
2116 | if (!pi->status_valid) | |
2117 | if (!proc_get_status (pi)) | |
2118 | return NULL; | |
2119 | ||
2120 | ret = &pi->prstatus.pr_sysexit; | |
2121 | #else | |
2122 | { | |
2123 | static sysset_t sysexit; | |
c5aa993b | 2124 | |
c3f6f71d JM |
2125 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2126 | ret = &sysexit; | |
2127 | } | |
2128 | #endif | |
2129 | if (save && ret) | |
2130 | memcpy (save, ret, sizeof (sysset_t)); | |
2131 | ||
2132 | return ret; | |
2133 | } | |
c906108c | 2134 | |
c3f6f71d JM |
2135 | /* |
2136 | * Function: proc_clear_current_fault | |
2137 | * | |
2138 | * The current fault (if any) is cleared; the associated signal | |
2139 | * will not be sent to the process or LWP when it resumes. | |
2140 | * Returns non-zero for success, zero for failure. | |
2141 | */ | |
c906108c | 2142 | |
c3f6f71d JM |
2143 | int |
2144 | proc_clear_current_fault (pi) | |
2145 | procinfo *pi; | |
2146 | { | |
2147 | int win; | |
2148 | ||
2149 | /* | |
2150 | * We should never have to apply this operation to any procinfo | |
2151 | * except the one for the main process. If that ever changes | |
2152 | * for any reason, then take out the following clause and | |
2153 | * replace it with one that makes sure the ctl_fd is open. | |
2154 | */ | |
2155 | ||
2156 | if (pi->tid != 0) | |
2157 | pi = find_procinfo_or_die (pi->pid, 0); | |
2158 | ||
2159 | #ifdef NEW_PROC_API | |
2160 | { | |
2161 | int cmd = PCCFAULT; | |
2162 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2163 | } | |
2164 | #else | |
2165 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2166 | #endif | |
2167 | ||
2168 | return win; | |
c906108c SS |
2169 | } |
2170 | ||
2171 | /* | |
c3f6f71d JM |
2172 | * Function: proc_set_current_signal |
2173 | * | |
2174 | * Set the "current signal" that will be delivered next to the process. | |
2175 | * NOTE: semantics are different from those of KILL. | |
2176 | * This signal will be delivered to the process or LWP | |
2177 | * immediately when it is resumed (even if the signal is held/blocked); | |
2178 | * it will NOT immediately cause another event of interest, and will NOT | |
2179 | * first trap back to the debugger. | |
2180 | * | |
2181 | * Returns non-zero for success, zero for failure. | |
2182 | */ | |
2183 | ||
2184 | int | |
2185 | proc_set_current_signal (pi, signo) | |
2186 | procinfo *pi; | |
2187 | int signo; | |
2188 | { | |
2189 | int win; | |
2190 | struct { | |
2191 | int cmd; | |
2192 | /* Use char array to avoid alignment issues. */ | |
2193 | char sinfo[sizeof (struct siginfo)]; | |
2194 | } arg; | |
2195 | struct siginfo *mysinfo; | |
2196 | ||
2197 | /* | |
2198 | * We should never have to apply this operation to any procinfo | |
2199 | * except the one for the main process. If that ever changes | |
2200 | * for any reason, then take out the following clause and | |
2201 | * replace it with one that makes sure the ctl_fd is open. | |
2202 | */ | |
2203 | ||
2204 | if (pi->tid != 0) | |
2205 | pi = find_procinfo_or_die (pi->pid, 0); | |
2206 | ||
2207 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2208 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2209 | * receives a PIOCSSIG with a signal identical to the current signal, | |
2210 | * it messes up the current signal. Work around the kernel bug. | |
2211 | */ | |
2212 | if (signo > 0 && | |
2213 | signo == proc_cursig (pi)) | |
2214 | return 1; /* I assume this is a success? */ | |
2215 | #endif | |
2216 | ||
2217 | /* The pointer is just a type alias. */ | |
2218 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2219 | mysinfo->si_signo = signo; | |
2220 | mysinfo->si_code = 0; | |
2221 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2222 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2223 | ||
2224 | #ifdef NEW_PROC_API | |
2225 | arg.cmd = PCSSIG; | |
2226 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2227 | #else | |
2228 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2229 | #endif | |
c906108c | 2230 | |
c3f6f71d JM |
2231 | return win; |
2232 | } | |
c906108c | 2233 | |
c3f6f71d JM |
2234 | /* |
2235 | * Function: proc_clear_current_signal | |
2236 | * | |
2237 | * The current signal (if any) is cleared, and | |
2238 | * is not sent to the process or LWP when it resumes. | |
2239 | * Returns non-zero for success, zero for failure. | |
2240 | */ | |
c906108c | 2241 | |
c3f6f71d JM |
2242 | int |
2243 | proc_clear_current_signal (pi) | |
2244 | procinfo *pi; | |
2245 | { | |
2246 | int win; | |
2247 | ||
2248 | /* | |
2249 | * We should never have to apply this operation to any procinfo | |
2250 | * except the one for the main process. If that ever changes | |
2251 | * for any reason, then take out the following clause and | |
2252 | * replace it with one that makes sure the ctl_fd is open. | |
2253 | */ | |
2254 | ||
2255 | if (pi->tid != 0) | |
2256 | pi = find_procinfo_or_die (pi->pid, 0); | |
2257 | ||
2258 | #ifdef NEW_PROC_API | |
2259 | { | |
2260 | struct { | |
2261 | int cmd; | |
2262 | /* Use char array to avoid alignment issues. */ | |
2263 | char sinfo[sizeof (struct siginfo)]; | |
2264 | } arg; | |
2265 | struct siginfo *mysinfo; | |
2266 | ||
2267 | arg.cmd = PCSSIG; | |
2268 | /* The pointer is just a type alias. */ | |
2269 | mysinfo = (struct siginfo *) &arg.sinfo; | |
2270 | mysinfo->si_signo = 0; | |
2271 | mysinfo->si_code = 0; | |
2272 | mysinfo->si_errno = 0; | |
2273 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2274 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2275 | ||
2276 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2277 | } | |
2278 | #else | |
2279 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2280 | #endif | |
c906108c | 2281 | |
c3f6f71d JM |
2282 | return win; |
2283 | } | |
c906108c | 2284 | |
c3f6f71d JM |
2285 | /* |
2286 | * Function: proc_get_gregs | |
2287 | * | |
2288 | * Get the general registers for the process or LWP. | |
2289 | * Returns non-zero for success, zero for failure. | |
2290 | */ | |
c906108c | 2291 | |
c3f6f71d JM |
2292 | gdb_gregset_t * |
2293 | proc_get_gregs (pi) | |
2294 | procinfo *pi; | |
2295 | { | |
2296 | if (!pi->status_valid || !pi->gregs_valid) | |
2297 | if (!proc_get_status (pi)) | |
2298 | return NULL; | |
2299 | ||
2300 | /* | |
2301 | * OK, sorry about the ifdef's. | |
2302 | * There's three cases instead of two, because | |
2303 | * in this instance Unixware and Solaris/RW differ. | |
2304 | */ | |
2305 | ||
2306 | #ifdef NEW_PROC_API | |
2307 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2308 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2309 | #else /* not Unixware */ | |
2310 | return &pi->prstatus.pr_lwp.pr_reg; | |
2311 | #endif /* Unixware */ | |
2312 | #else /* not NEW_PROC_API */ | |
2313 | return &pi->prstatus.pr_reg; | |
2314 | #endif /* NEW_PROC_API */ | |
2315 | } | |
c5aa993b | 2316 | |
c3f6f71d JM |
2317 | /* |
2318 | * Function: proc_get_fpregs | |
2319 | * | |
2320 | * Get the floating point registers for the process or LWP. | |
2321 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2322 | */ |
2323 | ||
c3f6f71d JM |
2324 | gdb_fpregset_t * |
2325 | proc_get_fpregs (pi) | |
2326 | procinfo *pi; | |
c906108c | 2327 | { |
c3f6f71d JM |
2328 | #ifdef NEW_PROC_API |
2329 | if (!pi->status_valid || !pi->fpregs_valid) | |
2330 | if (!proc_get_status (pi)) | |
2331 | return NULL; | |
2332 | ||
2333 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2334 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2335 | #else | |
2336 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2337 | #endif /* Unixware */ | |
c5aa993b | 2338 | |
c3f6f71d JM |
2339 | #else /* not NEW_PROC_API */ |
2340 | if (pi->fpregs_valid) | |
2341 | return &pi->fpregset; /* already got 'em */ | |
2342 | else | |
c906108c | 2343 | { |
c3f6f71d JM |
2344 | if (pi->ctl_fd == 0 && |
2345 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2346 | { |
c3f6f71d | 2347 | return NULL; |
c906108c | 2348 | } |
c3f6f71d | 2349 | else |
c906108c | 2350 | { |
c3f6f71d JM |
2351 | #ifdef PIOCTGFPREG |
2352 | struct { | |
2353 | long pr_count; | |
2354 | tid_t pr_error_thread; | |
2355 | tfpregset_t thread_1; | |
2356 | } thread_fpregs; | |
2357 | ||
2358 | thread_fpregs.pr_count = 1; | |
2359 | thread_fpregs.thread_1.tid = pi->tid; | |
2360 | ||
2361 | if (pi->tid == 0 && | |
2362 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2363 | { | |
2364 | pi->fpregs_valid = 1; | |
2365 | return &pi->fpregset; /* got 'em now! */ | |
2366 | } | |
2367 | else if (pi->tid != 0 && | |
2368 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2369 | { | |
2370 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2371 | sizeof (pi->fpregset)); | |
2372 | pi->fpregs_valid = 1; | |
2373 | return &pi->fpregset; /* got 'em now! */ | |
2374 | } | |
2375 | else | |
2376 | { | |
2377 | return NULL; | |
2378 | } | |
2379 | #else | |
2380 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2381 | { | |
2382 | pi->fpregs_valid = 1; | |
2383 | return &pi->fpregset; /* got 'em now! */ | |
2384 | } | |
2385 | else | |
2386 | { | |
2387 | return NULL; | |
2388 | } | |
2389 | #endif | |
c906108c | 2390 | } |
c906108c | 2391 | } |
c3f6f71d | 2392 | #endif |
c906108c SS |
2393 | } |
2394 | ||
c3f6f71d JM |
2395 | /* |
2396 | * Function: proc_set_gregs | |
2397 | * | |
2398 | * Write the general registers back to the process or LWP. | |
2399 | * Returns non-zero for success, zero for failure. | |
2400 | */ | |
2401 | ||
2402 | int | |
2403 | proc_set_gregs (pi) | |
2404 | procinfo *pi; | |
c906108c | 2405 | { |
c3f6f71d JM |
2406 | gdb_gregset_t *gregs; |
2407 | int win; | |
c5aa993b | 2408 | |
c3f6f71d JM |
2409 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2410 | return 0; /* get_regs has already warned */ | |
2411 | ||
2412 | if (pi->ctl_fd == 0 && | |
2413 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2414 | { |
c3f6f71d | 2415 | return 0; |
c906108c | 2416 | } |
c3f6f71d | 2417 | else |
c906108c | 2418 | { |
c3f6f71d JM |
2419 | #ifdef NEW_PROC_API |
2420 | struct { | |
2421 | int cmd; | |
2422 | /* Use char array to avoid alignment issues. */ | |
2423 | char gregs[sizeof (gdb_gregset_t)]; | |
2424 | } arg; | |
2425 | ||
2426 | arg.cmd = PCSREG; | |
2427 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2428 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2429 | #else | |
2430 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2431 | #endif | |
c906108c | 2432 | } |
c3f6f71d JM |
2433 | |
2434 | /* Policy: writing the regs invalidates our cache. */ | |
2435 | pi->gregs_valid = 0; | |
2436 | return win; | |
c906108c SS |
2437 | } |
2438 | ||
c3f6f71d JM |
2439 | /* |
2440 | * Function: proc_set_fpregs | |
2441 | * | |
2442 | * Modify the floating point register set of the process or LWP. | |
2443 | * Returns non-zero for success, zero for failure. | |
2444 | */ | |
2445 | ||
2446 | int | |
2447 | proc_set_fpregs (pi) | |
2448 | procinfo *pi; | |
c906108c | 2449 | { |
c3f6f71d JM |
2450 | gdb_fpregset_t *fpregs; |
2451 | int win; | |
2452 | ||
2453 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2454 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2455 | |
c3f6f71d JM |
2456 | if (pi->ctl_fd == 0 && |
2457 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2458 | { |
c3f6f71d | 2459 | return 0; |
c906108c | 2460 | } |
c3f6f71d | 2461 | else |
c906108c | 2462 | { |
c3f6f71d JM |
2463 | #ifdef NEW_PROC_API |
2464 | struct { | |
2465 | int cmd; | |
2466 | /* Use char array to avoid alignment issues. */ | |
2467 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2468 | } arg; | |
2469 | ||
2470 | arg.cmd = PCSFPREG; | |
2471 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2472 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2473 | #else | |
2474 | #ifdef PIOCTSFPREG | |
2475 | if (pi->tid == 0) | |
2476 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2477 | else | |
2478 | { | |
2479 | struct { | |
2480 | long pr_count; | |
2481 | tid_t pr_error_thread; | |
2482 | tfpregset_t thread_1; | |
2483 | } thread_fpregs; | |
2484 | ||
2485 | thread_fpregs.pr_count = 1; | |
2486 | thread_fpregs.thread_1.tid = pi->tid; | |
2487 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2488 | sizeof (*fpregs)); | |
2489 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2490 | } | |
2491 | #else | |
2492 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2493 | #endif /* osf PIOCTSFPREG */ | |
2494 | #endif /* NEW_PROC_API */ | |
c906108c | 2495 | } |
c3f6f71d JM |
2496 | |
2497 | /* Policy: writing the regs invalidates our cache. */ | |
2498 | pi->fpregs_valid = 0; | |
2499 | return win; | |
c906108c SS |
2500 | } |
2501 | ||
2502 | /* | |
c3f6f71d JM |
2503 | * Function: proc_kill |
2504 | * | |
2505 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2506 | * Returns non-zero for success, zero for failure. | |
2507 | */ | |
c906108c | 2508 | |
c3f6f71d JM |
2509 | int |
2510 | proc_kill (pi, signo) | |
2511 | procinfo *pi; | |
2512 | int signo; | |
2513 | { | |
2514 | int win; | |
c906108c | 2515 | |
c3f6f71d JM |
2516 | /* |
2517 | * We might conceivably apply this operation to an LWP, and | |
2518 | * the LWP's ctl file descriptor might not be open. | |
2519 | */ | |
c906108c | 2520 | |
c3f6f71d JM |
2521 | if (pi->ctl_fd == 0 && |
2522 | open_procinfo_files (pi, FD_CTL) == 0) | |
2523 | { | |
2524 | return 0; | |
2525 | } | |
2526 | else | |
2527 | { | |
2528 | #ifdef NEW_PROC_API | |
2529 | int cmd[2]; | |
c906108c | 2530 | |
c3f6f71d JM |
2531 | cmd[0] = PCKILL; |
2532 | cmd[1] = signo; | |
2533 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2534 | #else /* ioctl method */ | |
2535 | /* FIXME: do I need the Alpha OSF fixups present in | |
2536 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2537 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2538 | #endif | |
2539 | } | |
c906108c | 2540 | |
c3f6f71d JM |
2541 | return win; |
2542 | } | |
c906108c | 2543 | |
c3f6f71d JM |
2544 | /* |
2545 | * Function: proc_parent_pid | |
2546 | * | |
2547 | * Find the pid of the process that started this one. | |
2548 | * Returns the parent process pid, or zero. | |
c906108c SS |
2549 | */ |
2550 | ||
c3f6f71d JM |
2551 | int |
2552 | proc_parent_pid (pi) | |
2553 | procinfo *pi; | |
c906108c | 2554 | { |
c3f6f71d JM |
2555 | /* |
2556 | * We should never have to apply this operation to any procinfo | |
2557 | * except the one for the main process. If that ever changes | |
2558 | * for any reason, then take out the following clause and | |
2559 | * replace it with one that makes sure the ctl_fd is open. | |
2560 | */ | |
2561 | ||
2562 | if (pi->tid != 0) | |
2563 | pi = find_procinfo_or_die (pi->pid, 0); | |
2564 | ||
2565 | if (!pi->status_valid) | |
2566 | if (!proc_get_status (pi)) | |
2567 | return 0; | |
c5aa993b | 2568 | |
c3f6f71d JM |
2569 | return pi->prstatus.pr_ppid; |
2570 | } | |
2571 | ||
2572 | ||
2573 | /* | |
2574 | * Function: proc_set_watchpoint | |
2575 | * | |
2576 | */ | |
2577 | ||
2578 | int | |
2579 | proc_set_watchpoint (pi, addr, len, wflags) | |
2580 | procinfo *pi; | |
2581 | void *addr; | |
2582 | int len; | |
2583 | int wflags; | |
2584 | { | |
2585 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) | |
2586 | return 0; | |
2587 | #else | |
2588 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2589 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2590 | return 0; | |
2591 | #else | |
2592 | struct { | |
2593 | int cmd; | |
2594 | char watch[sizeof (prwatch_t)]; | |
2595 | } arg; | |
2596 | prwatch_t *pwatch; | |
2597 | ||
2598 | pwatch = (prwatch_t *) &arg.watch; | |
2599 | pwatch->pr_vaddr = addr; | |
2600 | pwatch->pr_size = len; | |
2601 | pwatch->pr_wflags = wflags; | |
2602 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2603 | arg.cmd = PCWATCH; | |
2604 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2605 | #else | |
2606 | #if defined (PIOCSWATCH) | |
2607 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2608 | #else | |
2609 | return 0; /* Fail */ | |
2610 | #endif | |
2611 | #endif | |
2612 | #endif | |
2613 | #endif | |
c906108c SS |
2614 | } |
2615 | ||
2616 | /* | |
c3f6f71d JM |
2617 | * Function: proc_iterate_over_mappings |
2618 | * | |
2619 | * Given a pointer to a function, call that function once for every | |
2620 | * mapped address space in the process. The callback function | |
2621 | * receives an open file descriptor for the file corresponding to | |
2622 | * that mapped address space (if there is one), and the base address | |
2623 | * of the mapped space. Quit when the callback function returns a | |
2624 | * nonzero value, or at teh end of the mappings. | |
2625 | * | |
2626 | * Returns: the first non-zero return value of the callback function, | |
2627 | * or zero. | |
2628 | */ | |
c906108c | 2629 | |
c3f6f71d JM |
2630 | /* FIXME: it's probably a waste to cache this FD. |
2631 | It doesn't get called that often... and if I open it | |
2632 | every time, I don't need to lseek it. */ | |
2633 | int | |
2634 | proc_iterate_over_mappings (func) | |
2635 | int (*func) PARAMS ((int, CORE_ADDR)); | |
2636 | { | |
2637 | struct prmap *map; | |
2638 | procinfo *pi; | |
0d06e24b | 2639 | #ifndef NEW_PROC_API /* avoid compiler warning */ |
0fda6bd2 JM |
2640 | int nmaps = 0; |
2641 | int i; | |
2642 | #else | |
2643 | int map_fd; | |
2644 | char pathname[MAX_PROC_NAME_SIZE]; | |
0d06e24b | 2645 | #endif |
c3f6f71d | 2646 | int funcstat = 0; |
0fda6bd2 | 2647 | int fd; |
c906108c | 2648 | |
c3f6f71d | 2649 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); |
c906108c | 2650 | |
c3f6f71d JM |
2651 | #ifdef NEW_PROC_API |
2652 | /* Open map fd. */ | |
2653 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
2654 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
2655 | proc_error (pi, "proc_iterate_over_mappings (open)", __LINE__); | |
c906108c | 2656 | |
c3f6f71d JM |
2657 | /* Make sure it gets closed again. */ |
2658 | make_cleanup ((make_cleanup_func) close, (void *) map_fd); | |
c906108c | 2659 | |
c3f6f71d JM |
2660 | /* Allocate space for mapping (lifetime only for this function). */ |
2661 | map = alloca (sizeof (struct prmap)); | |
c906108c | 2662 | |
c3f6f71d JM |
2663 | /* Now read the mappings from the file, |
2664 | open a file descriptor for those that have a name, | |
2665 | and call the callback function. */ | |
2666 | while (read (map_fd, | |
2667 | (void *) map, | |
2668 | sizeof (struct prmap)) == sizeof (struct prmap)) | |
2669 | { | |
2670 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
c906108c | 2671 | |
c3f6f71d JM |
2672 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
2673 | break; /* sanity */ | |
c906108c | 2674 | |
c3f6f71d JM |
2675 | if (map->pr_mapname[0] == 0) |
2676 | { | |
2677 | fd = -1; /* no map file */ | |
2678 | } | |
2679 | else | |
2680 | { | |
2681 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
2682 | /* Note: caller's responsibility to close this fd! */ | |
2683 | fd = open (name, O_RDONLY); | |
2684 | /* Note: we don't test the above call for failure; | |
2685 | we just pass the FD on as given. Sometimes there is | |
2686 | no file, so the ioctl may return failure, but that's | |
2687 | not a problem. */ | |
2688 | } | |
c906108c | 2689 | |
c3f6f71d JM |
2690 | /* Stop looping if the callback returns non-zero. */ |
2691 | if ((funcstat = (*func) (fd, (CORE_ADDR) map->pr_vaddr)) != 0) | |
2692 | break; | |
2693 | } | |
2694 | #else | |
2695 | /* Get the number of mapping entries. */ | |
2696 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmaps) < 0) | |
2697 | proc_error (pi, "proc_iterate_over_mappings (PIOCNMAP)", __LINE__); | |
2698 | ||
2699 | /* Allocate space for mappings (lifetime only this function). */ | |
2700 | map = (struct prmap *) alloca ((nmaps + 1) * sizeof (struct prmap)); | |
2701 | ||
2702 | /* Read in all the mappings. */ | |
2703 | if (ioctl (pi->ctl_fd, PIOCMAP, map) < 0) | |
2704 | proc_error (pi, "proc_iterate_over_mappings (PIOCMAP)", __LINE__); | |
2705 | ||
2706 | /* Now loop through the mappings, open an fd for each, and | |
2707 | call the callback function. */ | |
2708 | for (i = 0; | |
2709 | i < nmaps && map[i].pr_size != 0; | |
2710 | i++) | |
2711 | { | |
2712 | /* Note: caller's responsibility to close this fd! */ | |
2713 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map[i].pr_vaddr); | |
2714 | /* Note: we don't test the above call for failure; | |
2715 | we just pass the FD on as given. Sometimes there is | |
2716 | no file, so the ioctl may return failure, but that's | |
2717 | not a problem. */ | |
2718 | ||
2719 | /* Stop looping if the callback returns non-zero. */ | |
2720 | if ((funcstat = (*func) (fd, (CORE_ADDR) map[i].pr_vaddr)) != 0) | |
2721 | break; | |
2722 | } | |
c906108c | 2723 | #endif |
c906108c | 2724 | |
c3f6f71d JM |
2725 | return funcstat; |
2726 | } | |
c906108c | 2727 | |
c3f6f71d | 2728 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2729 | |
c3f6f71d | 2730 | #include <sys/sysi86.h> |
c906108c | 2731 | |
c3f6f71d JM |
2732 | /* |
2733 | * Function: proc_get_LDT_entry | |
2734 | * | |
2735 | * Inputs: | |
2736 | * procinfo *pi; | |
2737 | * int key; | |
2738 | * | |
2739 | * The 'key' is actually the value of the lower 16 bits of | |
2740 | * the GS register for the LWP that we're interested in. | |
2741 | * | |
2742 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2743 | */ |
2744 | ||
c3f6f71d JM |
2745 | struct ssd * |
2746 | proc_get_LDT_entry (pi, key) | |
2747 | procinfo *pi; | |
2748 | int key; | |
c906108c | 2749 | { |
c3f6f71d JM |
2750 | static struct ssd *ldt_entry = NULL; |
2751 | #ifdef NEW_PROC_API | |
2752 | char pathname[MAX_PROC_NAME_SIZE]; | |
2753 | struct cleanup *old_chain = NULL; | |
2754 | int fd; | |
2755 | ||
2756 | /* Allocate space for one LDT entry. | |
2757 | This alloc must persist, because we return a pointer to it. */ | |
2758 | if (ldt_entry == NULL) | |
2759 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2760 | ||
2761 | /* Open the file descriptor for the LDT table. */ | |
2762 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
2763 | if ((fd = open (pathname, O_RDONLY)) < 0) | |
c906108c | 2764 | { |
c3f6f71d JM |
2765 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2766 | return NULL; | |
c906108c | 2767 | } |
c3f6f71d JM |
2768 | /* Make sure it gets closed again! */ |
2769 | old_chain = make_cleanup ((make_cleanup_func) close, (void *) fd); | |
c906108c | 2770 | |
c3f6f71d JM |
2771 | /* Now 'read' thru the table, find a match and return it. */ |
2772 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2773 | { |
c3f6f71d JM |
2774 | if (ldt_entry->sel == 0 && |
2775 | ldt_entry->bo == 0 && | |
2776 | ldt_entry->acc1 == 0 && | |
2777 | ldt_entry->acc2 == 0) | |
2778 | break; /* end of table */ | |
2779 | /* If key matches, return this entry. */ | |
2780 | if (ldt_entry->sel == key) | |
2781 | return ldt_entry; | |
c906108c | 2782 | } |
c3f6f71d JM |
2783 | /* Loop ended, match not found. */ |
2784 | return NULL; | |
2785 | #else | |
2786 | int nldt, i; | |
2787 | static int nalloc = 0; | |
c906108c | 2788 | |
c3f6f71d JM |
2789 | /* Get the number of LDT entries. */ |
2790 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2791 | { |
c3f6f71d JM |
2792 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2793 | return NULL; | |
c906108c SS |
2794 | } |
2795 | ||
c3f6f71d JM |
2796 | /* Allocate space for the number of LDT entries. */ |
2797 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2798 | if (nldt > nalloc) | |
c906108c | 2799 | { |
c3f6f71d JM |
2800 | ldt_entry = (struct ssd *) |
2801 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); | |
2802 | nalloc = nldt; | |
2803 | } | |
2804 | ||
2805 | /* Read the whole table in one gulp. */ | |
2806 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2807 | { | |
2808 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2809 | return NULL; | |
c906108c SS |
2810 | } |
2811 | ||
c3f6f71d JM |
2812 | /* Search the table and return the (first) entry matching 'key'. */ |
2813 | for (i = 0; i < nldt; i++) | |
2814 | if (ldt_entry[i].sel == key) | |
2815 | return &ldt_entry[i]; | |
c906108c | 2816 | |
c3f6f71d JM |
2817 | /* Loop ended, match not found. */ |
2818 | return NULL; | |
2819 | #endif | |
2820 | } | |
c906108c | 2821 | |
c3f6f71d | 2822 | #endif /* TM_I386SOL2_H */ |
c906108c | 2823 | |
c3f6f71d | 2824 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2825 | |
c3f6f71d | 2826 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2827 | |
c3f6f71d JM |
2828 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2829 | since there is a different way to do threads on every OS. */ | |
c906108c | 2830 | |
c3f6f71d JM |
2831 | /* |
2832 | * Function: proc_get_nthreads | |
2833 | * | |
2834 | * Return the number of threads for the process | |
2835 | */ | |
c906108c | 2836 | |
c3f6f71d JM |
2837 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
2838 | /* | |
2839 | * OSF version | |
2840 | */ | |
2841 | int | |
2842 | proc_get_nthreads (pi) | |
2843 | procinfo *pi; | |
2844 | { | |
2845 | int nthreads = 0; | |
c906108c | 2846 | |
c3f6f71d JM |
2847 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2848 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2849 | |
c3f6f71d | 2850 | return nthreads; |
c906108c SS |
2851 | } |
2852 | ||
c3f6f71d JM |
2853 | #else |
2854 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2855 | /* | |
2856 | * Solaris and Unixware version | |
2857 | */ | |
2858 | int | |
2859 | proc_get_nthreads (pi) | |
2860 | procinfo *pi; | |
c906108c | 2861 | { |
c3f6f71d JM |
2862 | if (!pi->status_valid) |
2863 | if (!proc_get_status (pi)) | |
2864 | return 0; | |
c5aa993b | 2865 | |
c3f6f71d JM |
2866 | /* |
2867 | * NEW_PROC_API: only works for the process procinfo, | |
2868 | * because the LWP procinfos do not get prstatus filled in. | |
2869 | */ | |
2870 | #ifdef NEW_PROC_API | |
2871 | if (pi->tid != 0) /* find the parent process procinfo */ | |
2872 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 2873 | #endif |
c3f6f71d | 2874 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2875 | } |
2876 | ||
c3f6f71d JM |
2877 | #else |
2878 | /* | |
2879 | * Default version | |
2880 | */ | |
2881 | int | |
2882 | proc_get_nthreads (pi) | |
2883 | procinfo *pi; | |
c906108c | 2884 | { |
c3f6f71d JM |
2885 | return 0; |
2886 | } | |
2887 | #endif | |
2888 | #endif | |
2889 | ||
2890 | /* | |
2891 | * Function: proc_get_current_thread (LWP version) | |
2892 | * | |
2893 | * Return the ID of the thread that had an event of interest. | |
2894 | * (ie. the one that hit a breakpoint or other traced event). | |
2895 | * All other things being equal, this should be the ID of a | |
2896 | * thread that is currently executing. | |
2897 | */ | |
2898 | ||
2899 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
2900 | /* | |
2901 | * Solaris and Unixware version | |
2902 | */ | |
2903 | int | |
2904 | proc_get_current_thread (pi) | |
2905 | procinfo *pi; | |
2906 | { | |
2907 | /* | |
2908 | * Note: this should be applied to the root procinfo for the process, | |
2909 | * not to the procinfo for an LWP. If applied to the procinfo for | |
2910 | * an LWP, it will simply return that LWP's ID. In that case, | |
2911 | * find the parent process procinfo. | |
2912 | */ | |
2913 | ||
2914 | if (pi->tid != 0) | |
2915 | pi = find_procinfo_or_die (pi->pid, 0); | |
2916 | ||
2917 | if (!pi->status_valid) | |
2918 | if (!proc_get_status (pi)) | |
2919 | return 0; | |
2920 | ||
2921 | #ifdef NEW_PROC_API | |
2922 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2923 | #else |
c3f6f71d | 2924 | return pi->prstatus.pr_who; |
c906108c | 2925 | #endif |
c3f6f71d | 2926 | } |
c906108c | 2927 | |
c3f6f71d JM |
2928 | #else |
2929 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
2930 | /* | |
2931 | * OSF version | |
2932 | */ | |
2933 | int | |
2934 | proc_get_current_thread (pi) | |
2935 | procinfo *pi; | |
2936 | { | |
2937 | #if 0 /* FIXME: not ready for prime time? */ | |
2938 | return pi->prstatus.pr_tid; | |
2939 | #else | |
2940 | return 0; | |
2941 | #endif | |
c906108c SS |
2942 | } |
2943 | ||
c3f6f71d JM |
2944 | #else |
2945 | /* | |
2946 | * Default version | |
2947 | */ | |
2948 | int | |
2949 | proc_get_current_thread (pi) | |
2950 | procinfo *pi; | |
c906108c | 2951 | { |
c3f6f71d JM |
2952 | return 0; |
2953 | } | |
2954 | ||
2955 | #endif | |
2956 | #endif | |
c906108c | 2957 | |
c3f6f71d JM |
2958 | /* |
2959 | * Function: proc_update_threads | |
2960 | * | |
2961 | * Discover the IDs of all the threads within the process, and | |
2962 | * create a procinfo for each of them (chained to the parent). | |
2963 | * | |
2964 | * This unfortunately requires a different method on every OS. | |
2965 | * | |
2966 | * Return: non-zero for success, zero for failure. | |
2967 | */ | |
c906108c | 2968 | |
c3f6f71d JM |
2969 | int |
2970 | proc_delete_dead_threads (parent, thread, ignore) | |
2971 | procinfo *parent; | |
2972 | procinfo *thread; | |
2973 | void *ignore; | |
2974 | { | |
2975 | if (thread && parent) /* sanity */ | |
c906108c | 2976 | { |
c3f6f71d JM |
2977 | thread->status_valid = 0; |
2978 | if (!proc_get_status (thread)) | |
2979 | destroy_one_procinfo (&parent->thread_list, thread); | |
2980 | } | |
2981 | return 0; /* keep iterating */ | |
2982 | } | |
c5aa993b | 2983 | |
c3f6f71d JM |
2984 | #if defined (PIOCLSTATUS) |
2985 | /* | |
2986 | * Solaris 2.5 (ioctl) version | |
2987 | */ | |
2988 | int | |
2989 | proc_update_threads (pi) | |
2990 | procinfo *pi; | |
2991 | { | |
2992 | gdb_prstatus_t *prstatus; | |
2993 | struct cleanup *old_chain = NULL; | |
2994 | procinfo *thread; | |
2995 | int nlwp, i; | |
2996 | ||
2997 | /* | |
2998 | * We should never have to apply this operation to any procinfo | |
2999 | * except the one for the main process. If that ever changes | |
3000 | * for any reason, then take out the following clause and | |
3001 | * replace it with one that makes sure the ctl_fd is open. | |
3002 | */ | |
3003 | ||
3004 | if (pi->tid != 0) | |
3005 | pi = find_procinfo_or_die (pi->pid, 0); | |
3006 | ||
3007 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3008 | ||
3009 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3010 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3011 | ||
3012 | if ((prstatus = (gdb_prstatus_t *) | |
3013 | malloc (sizeof (gdb_prstatus_t) * (nlwp + 1))) == 0) | |
3014 | perror_with_name ("procfs: malloc failed in update_threads"); | |
3015 | ||
3016 | old_chain = make_cleanup (free, prstatus); | |
3017 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) | |
3018 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3019 | ||
3020 | /* Skip element zero, which represents the process as a whole. */ | |
3021 | for (i = 1; i < nlwp + 1; i++) | |
3022 | { | |
3023 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3024 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3025 | |
c3f6f71d JM |
3026 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3027 | thread->status_valid = 1; | |
3028 | } | |
3029 | pi->threads_valid = 1; | |
3030 | do_cleanups (old_chain); | |
3031 | return 1; | |
3032 | } | |
3033 | #else | |
3034 | #ifdef NEW_PROC_API | |
3035 | /* | |
3036 | * Unixware and Solaris 6 (and later) version | |
3037 | */ | |
3038 | int | |
3039 | proc_update_threads (pi) | |
3040 | procinfo *pi; | |
3041 | { | |
3042 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3043 | struct dirent *direntry; | |
3044 | struct cleanup *old_chain = NULL; | |
3045 | procinfo *thread; | |
3046 | DIR *dirp; | |
3047 | int lwpid; | |
3048 | ||
3049 | /* | |
3050 | * We should never have to apply this operation to any procinfo | |
3051 | * except the one for the main process. If that ever changes | |
3052 | * for any reason, then take out the following clause and | |
3053 | * replace it with one that makes sure the ctl_fd is open. | |
3054 | */ | |
3055 | ||
3056 | if (pi->tid != 0) | |
3057 | pi = find_procinfo_or_die (pi->pid, 0); | |
3058 | ||
3059 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3060 | ||
3061 | /* | |
3062 | * Unixware | |
3063 | * | |
3064 | * Note: this brute-force method is the only way I know of | |
3065 | * to accomplish this task on Unixware. This method will | |
3066 | * also work on Solaris 2.6 and 2.7. There is a much simpler | |
3067 | * and more elegant way to do this on Solaris, but the margins | |
3068 | * of this manuscript are too small to write it here... ;-) | |
3069 | */ | |
3070 | ||
3071 | strcpy (pathname, pi->pathname); | |
3072 | strcat (pathname, "/lwp"); | |
3073 | if ((dirp = opendir (pathname)) == NULL) | |
3074 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3075 | ||
3076 | old_chain = make_cleanup ((make_cleanup_func) closedir, dirp); | |
3077 | while ((direntry = readdir (dirp)) != NULL) | |
3078 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3079 | { | |
3080 | lwpid = atoi (&direntry->d_name[0]); | |
3081 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3082 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3083 | } | |
3084 | pi->threads_valid = 1; | |
3085 | do_cleanups (old_chain); | |
3086 | return 1; | |
3087 | } | |
3088 | #else | |
3089 | #ifdef PIOCTLIST | |
3090 | /* | |
3091 | * OSF version | |
3092 | */ | |
3093 | int | |
3094 | proc_update_threads (pi) | |
3095 | procinfo *pi; | |
3096 | { | |
3097 | int nthreads, i; | |
3098 | tid_t *threads; | |
3099 | ||
3100 | /* | |
3101 | * We should never have to apply this operation to any procinfo | |
3102 | * except the one for the main process. If that ever changes | |
3103 | * for any reason, then take out the following clause and | |
3104 | * replace it with one that makes sure the ctl_fd is open. | |
3105 | */ | |
3106 | ||
3107 | if (pi->tid != 0) | |
3108 | pi = find_procinfo_or_die (pi->pid, 0); | |
3109 | ||
3110 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3111 | ||
3112 | nthreads = proc_get_nthreads (pi); | |
3113 | if (nthreads < 2) | |
3114 | return 0; /* nothing to do for 1 or fewer threads */ | |
3115 | ||
3116 | if ((threads = malloc (nthreads * sizeof (tid_t))) == NULL) | |
3117 | proc_error (pi, "update_threads, malloc", __LINE__); | |
3118 | ||
3119 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) | |
3120 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3121 | ||
3122 | for (i = 0; i < nthreads; i++) | |
3123 | { | |
3124 | if (!find_procinfo (pi->pid, threads[i])) | |
3125 | if (!create_procinfo (pi->pid, threads[i])) | |
3126 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3127 | } |
c3f6f71d JM |
3128 | pi->threads_valid = 1; |
3129 | return 1; | |
c906108c | 3130 | } |
c3f6f71d JM |
3131 | #else |
3132 | /* | |
3133 | * Default version | |
3134 | */ | |
3135 | int | |
3136 | proc_update_threads (pi) | |
3137 | procinfo *pi; | |
3138 | { | |
3139 | return 0; | |
3140 | } | |
3141 | #endif /* OSF PIOCTLIST */ | |
3142 | #endif /* NEW_PROC_API */ | |
3143 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3144 | |
c3f6f71d JM |
3145 | /* |
3146 | * Function: proc_iterate_over_threads | |
3147 | * | |
3148 | * Description: | |
3149 | * Given a pointer to a function, call that function once | |
3150 | * for each lwp in the procinfo list, until the function | |
3151 | * returns non-zero, in which event return the value | |
3152 | * returned by the function. | |
3153 | * | |
3154 | * Note: this function does NOT call update_threads. | |
3155 | * If you want to discover new threads first, you must | |
3156 | * call that function explicitly. This function just makes | |
3157 | * a quick pass over the currently-known procinfos. | |
3158 | * | |
3159 | * Arguments: | |
3160 | * pi - parent process procinfo | |
3161 | * func - per-thread function | |
3162 | * ptr - opaque parameter for function. | |
3163 | * | |
3164 | * Return: | |
3165 | * First non-zero return value from the callee, or zero. | |
3166 | */ | |
3167 | ||
3168 | int | |
3169 | proc_iterate_over_threads (pi, func, ptr) | |
3170 | procinfo *pi; | |
3171 | int (*func) PARAMS ((procinfo *, procinfo *, void *)); | |
3172 | void *ptr; | |
c906108c | 3173 | { |
c3f6f71d JM |
3174 | procinfo *thread, *next; |
3175 | int retval = 0; | |
c906108c | 3176 | |
c3f6f71d JM |
3177 | /* |
3178 | * We should never have to apply this operation to any procinfo | |
3179 | * except the one for the main process. If that ever changes | |
3180 | * for any reason, then take out the following clause and | |
3181 | * replace it with one that makes sure the ctl_fd is open. | |
3182 | */ | |
3183 | ||
3184 | if (pi->tid != 0) | |
3185 | pi = find_procinfo_or_die (pi->pid, 0); | |
3186 | ||
3187 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3188 | { |
c3f6f71d JM |
3189 | next = thread->next; /* in case thread is destroyed */ |
3190 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3191 | break; | |
c906108c | 3192 | } |
c3f6f71d JM |
3193 | |
3194 | return retval; | |
c906108c SS |
3195 | } |
3196 | ||
c3f6f71d JM |
3197 | /* =================== END, Thread "MODULE" =================== */ |
3198 | ||
3199 | /* =================== END, /proc "MODULE" =================== */ | |
3200 | ||
3201 | /* =================== GDB "MODULE" =================== */ | |
3202 | ||
3203 | /* | |
3204 | * Here are all of the gdb target vector functions and their friends. | |
3205 | */ | |
3206 | ||
3207 | static int do_attach PARAMS ((int pid)); | |
3208 | static void do_detach PARAMS ((int signo)); | |
3209 | static int register_gdb_signals PARAMS ((procinfo *, sigset_t *)); | |
3210 | ||
3211 | /* | |
3212 | * Function: procfs_debug_inferior | |
3213 | * | |
3214 | * Sets up the inferior to be debugged. | |
3215 | * Registers to trace signals, hardware faults, and syscalls. | |
3216 | * Note: does not set RLC flag: caller may want to customize that. | |
3217 | * | |
3218 | * Returns: zero for success (note! unlike most functions in this module) | |
3219 | * On failure, returns the LINE NUMBER where it failed! | |
3220 | */ | |
3221 | ||
3222 | static int | |
3223 | procfs_debug_inferior (pi) | |
3224 | procinfo *pi; | |
c906108c | 3225 | { |
c3f6f71d JM |
3226 | fltset_t traced_faults; |
3227 | sigset_t traced_signals; | |
3228 | sysset_t traced_syscall_entries; | |
3229 | sysset_t traced_syscall_exits; | |
c906108c | 3230 | |
c3f6f71d JM |
3231 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3232 | /* On some systems (OSF), we don't trace hardware faults. | |
3233 | Apparently it's enough that we catch them as signals. | |
3234 | Wonder why we don't just do that in general? */ | |
3235 | premptyset (&traced_faults); /* don't trace faults. */ | |
3236 | #else | |
3237 | /* Register to trace hardware faults in the child. */ | |
3238 | prfillset (&traced_faults); /* trace all faults... */ | |
3239 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3240 | #endif | |
3241 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3242 | return __LINE__; | |
c906108c | 3243 | |
c3f6f71d JM |
3244 | /* Register to trace selected signals in the child. */ |
3245 | premptyset (&traced_signals); | |
3246 | if (!register_gdb_signals (pi, &traced_signals)) | |
3247 | return __LINE__; | |
3248 | ||
3249 | /* Register to trace the 'exit' system call (on entry). */ | |
3250 | premptyset (&traced_syscall_entries); | |
3251 | praddset (&traced_syscall_entries, SYS_exit); | |
3252 | #ifdef SYS_lwpexit | |
3253 | praddset (&traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ | |
3254 | #endif | |
3255 | #ifdef SYS_lwp_exit | |
3256 | praddset (&traced_syscall_entries, SYS_lwp_exit); | |
c906108c SS |
3257 | #endif |
3258 | ||
c3f6f71d JM |
3259 | if (!proc_set_traced_sysentry (pi, &traced_syscall_entries)) |
3260 | return __LINE__; | |
3261 | ||
3262 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3263 | /* OSF method for tracing exec syscalls. Quoting: | |
3264 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3265 | exits from exec system calls because of the user level loader. */ | |
3266 | /* FIXME: make nice and maybe move into an access function. */ | |
3267 | { | |
3268 | int prfs_flags; | |
3269 | ||
3270 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3271 | return __LINE__; | |
3272 | ||
3273 | prfs_flags |= PRFS_STOPEXEC; | |
3274 | ||
3275 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3276 | return __LINE__; | |
3277 | } | |
3278 | #else /* not PRFS_STOPEXEC */ | |
3279 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3280 | /* GW: Rationale... | |
3281 | Not all systems with /proc have all the exec* syscalls with the same | |
3282 | names. On the SGI, for example, there is no SYS_exec, but there | |
3283 | *is* a SYS_execv. So, we try to account for that. */ | |
3284 | ||
3285 | premptyset (&traced_syscall_exits); | |
3286 | #ifdef SYS_exec | |
3287 | praddset (&traced_syscall_exits, SYS_exec); | |
3288 | #endif | |
3289 | #ifdef SYS_execve | |
3290 | praddset (&traced_syscall_exits, SYS_execve); | |
3291 | #endif | |
3292 | #ifdef SYS_execv | |
3293 | praddset (&traced_syscall_exits, SYS_execv); | |
3294 | #endif | |
c5aa993b | 3295 | |
c3f6f71d JM |
3296 | #ifdef SYS_lwpcreate |
3297 | praddset (&traced_syscall_exits, SYS_lwpcreate); | |
3298 | praddset (&traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3299 | #endif |
c5aa993b | 3300 | |
c3f6f71d JM |
3301 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
3302 | praddset (&traced_syscall_exits, SYS_lwp_create); | |
3303 | praddset (&traced_syscall_exits, SYS_lwp_exit); | |
3304 | #endif | |
c5aa993b | 3305 | |
c906108c | 3306 | |
c3f6f71d JM |
3307 | if (!proc_set_traced_sysexit (pi, &traced_syscall_exits)) |
3308 | return __LINE__; | |
3309 | ||
3310 | #endif /* PRFS_STOPEXEC */ | |
3311 | return 0; | |
c906108c SS |
3312 | } |
3313 | ||
c3f6f71d JM |
3314 | static void |
3315 | procfs_attach (args, from_tty) | |
3316 | char *args; | |
3317 | int from_tty; | |
c906108c | 3318 | { |
c3f6f71d JM |
3319 | char *exec_file; |
3320 | int pid; | |
3321 | ||
3322 | if (!args) | |
3323 | error_no_arg ("process-id to attach"); | |
3324 | ||
3325 | pid = atoi (args); | |
3326 | if (pid == getpid ()) | |
3327 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3328 | |
c3f6f71d | 3329 | if (from_tty) |
c906108c | 3330 | { |
c3f6f71d JM |
3331 | exec_file = get_exec_file (0); |
3332 | ||
3333 | if (exec_file) | |
3334 | printf_filtered ("Attaching to program `%s', %s\n", | |
3335 | exec_file, target_pid_to_str (pid)); | |
3336 | else | |
3337 | printf_filtered ("Attaching to %s\n", target_pid_to_str (pid)); | |
3338 | ||
3339 | fflush (stdout); | |
c906108c | 3340 | } |
c3f6f71d JM |
3341 | inferior_pid = do_attach (pid); |
3342 | push_target (&procfs_ops); | |
3343 | } | |
3344 | ||
3345 | static void | |
3346 | procfs_detach (args, from_tty) | |
3347 | char *args; | |
3348 | int from_tty; | |
3349 | { | |
3350 | char *exec_file; | |
3351 | int signo = 0; | |
3352 | ||
3353 | if (from_tty) | |
c906108c | 3354 | { |
c3f6f71d JM |
3355 | exec_file = get_exec_file (0); |
3356 | if (exec_file == 0) | |
3357 | exec_file = ""; | |
3358 | printf_filtered ("Detaching from program: %s %s\n", | |
3359 | exec_file, target_pid_to_str (inferior_pid)); | |
3360 | fflush (stdout); | |
c906108c | 3361 | } |
c3f6f71d JM |
3362 | if (args) |
3363 | signo = atoi (args); | |
3364 | ||
3365 | do_detach (signo); | |
3366 | inferior_pid = 0; | |
3367 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ | |
c906108c SS |
3368 | } |
3369 | ||
c3f6f71d JM |
3370 | static int |
3371 | do_attach (pid) | |
3372 | int pid; | |
c906108c | 3373 | { |
c3f6f71d JM |
3374 | procinfo *pi; |
3375 | int fail; | |
3376 | ||
3377 | if ((pi = create_procinfo (pid, 0)) == NULL) | |
3378 | perror ("procfs: out of memory in 'attach'"); | |
3379 | ||
3380 | if (!open_procinfo_files (pi, FD_CTL)) | |
3381 | { | |
3382 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
3383 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", | |
3384 | pid); | |
3385 | dead_procinfo (pi, errmsg, NOKILL); | |
3386 | } | |
c906108c | 3387 | |
c3f6f71d JM |
3388 | /* Stop the process (if it isn't already stopped). */ |
3389 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3390 | { |
c3f6f71d JM |
3391 | pi->was_stopped = 1; |
3392 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3393 | } |
3394 | else | |
3395 | { | |
c3f6f71d JM |
3396 | pi->was_stopped = 0; |
3397 | /* Set the process to run again when we close it. */ | |
3398 | if (!proc_set_run_on_last_close (pi)) | |
3399 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3400 | ||
3401 | /* Now stop the process. */ | |
3402 | if (!proc_stop_process (pi)) | |
3403 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3404 | pi->ignore_next_sigstop = 1; | |
c906108c | 3405 | } |
c3f6f71d JM |
3406 | /* Save some of the /proc state to be restored if we detach. */ |
3407 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3408 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3409 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3410 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
3411 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
3412 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", | |
3413 | NOKILL); | |
3414 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
3415 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", | |
3416 | NOKILL); | |
3417 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3418 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3419 | ||
3420 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3421 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3422 | ||
3423 | /* Let GDB know that the inferior was attached. */ | |
3424 | attach_flag = 1; | |
3425 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3426 | } |
3427 | ||
3428 | static void | |
c3f6f71d JM |
3429 | do_detach (signo) |
3430 | int signo; | |
c906108c | 3431 | { |
c3f6f71d | 3432 | procinfo *pi; |
c906108c | 3433 | |
c3f6f71d JM |
3434 | /* Find procinfo for the main process */ |
3435 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); /* FIXME: threads */ | |
3436 | if (signo) | |
3437 | if (!proc_set_current_signal (pi, signo)) | |
3438 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3439 | |
c3f6f71d JM |
3440 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3441 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3442 | |
c3f6f71d JM |
3443 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3444 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3445 | ||
3446 | if (!proc_set_traced_sysentry (pi, &pi->saved_entryset)) | |
3447 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); | |
3448 | ||
3449 | if (!proc_set_traced_sysexit (pi, &pi->saved_exitset)) | |
3450 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); | |
3451 | ||
3452 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3453 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3454 | ||
3455 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3456 | if (signo || !(pi->was_stopped) || | |
3457 | query ("Was stopped when attached, make it runnable again? ")) | |
3458 | { | |
3459 | /* Clear any pending signal. */ | |
3460 | if (!proc_clear_current_fault (pi)) | |
3461 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3462 | ||
3463 | if (!proc_set_run_on_last_close (pi)) | |
3464 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3465 | } | |
3466 | ||
3467 | attach_flag = 0; | |
3468 | destroy_procinfo (pi); | |
c906108c SS |
3469 | } |
3470 | ||
c3f6f71d JM |
3471 | /* |
3472 | * fetch_registers | |
3473 | * | |
3474 | * Since the /proc interface cannot give us individual registers, | |
3475 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3476 | * This results in the possibility that we will do unnecessarily many | |
3477 | * fetches, since we may be called repeatedly for individual registers. | |
3478 | * So we cache the results, and mark the cache invalid when the process | |
3479 | * is resumed. | |
3480 | */ | |
3481 | ||
c906108c | 3482 | static void |
c3f6f71d JM |
3483 | procfs_fetch_registers (regno) |
3484 | int regno; | |
c906108c | 3485 | { |
c3f6f71d JM |
3486 | gdb_fpregset_t *fpregs; |
3487 | gdb_gregset_t *gregs; | |
3488 | procinfo *pi; | |
3489 | int pid; | |
3490 | int tid; | |
c906108c | 3491 | |
c3f6f71d JM |
3492 | pid = PIDGET (inferior_pid); |
3493 | tid = TIDGET (inferior_pid); | |
3494 | ||
3495 | /* First look up procinfo for the main process. */ | |
3496 | pi = find_procinfo_or_die (pid, 0); | |
3497 | ||
3498 | /* If the event thread is not the same as GDB's requested thread | |
3499 | (ie. inferior_pid), then look up procinfo for the requested | |
3500 | thread. */ | |
3501 | if ((tid != 0) && | |
3502 | (tid != proc_get_current_thread (pi))) | |
3503 | pi = find_procinfo_or_die (pid, tid); | |
3504 | ||
3505 | if (pi == NULL) | |
3506 | error ("procfs: fetch_registers failed to find procinfo for %s", | |
3507 | target_pid_to_str (inferior_pid)); | |
3508 | ||
3509 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3510 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3511 | ||
3512 | supply_gregset (gregs); | |
3513 | ||
3514 | #if defined (FP0_REGNUM) /* need floating point? */ | |
3515 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3516 | regno == PC_REGNUM || | |
3517 | #ifdef NPC_REGNUM | |
3518 | regno == NPC_REGNUM || | |
c906108c | 3519 | #endif |
c3f6f71d JM |
3520 | regno == FP_REGNUM || |
3521 | regno == SP_REGNUM) | |
3522 | return; /* not a floating point register */ | |
c5aa993b | 3523 | |
c3f6f71d JM |
3524 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3525 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3526 | |
c3f6f71d | 3527 | supply_fpregset (fpregs); |
c906108c | 3528 | #endif |
c906108c SS |
3529 | } |
3530 | ||
c3f6f71d JM |
3531 | /* Get ready to modify the registers array. On machines which store |
3532 | individual registers, this doesn't need to do anything. On | |
3533 | machines which store all the registers in one fell swoop, such as | |
3534 | /proc, this makes sure that registers contains all the registers | |
3535 | from the program being debugged. */ | |
3536 | ||
c906108c | 3537 | static void |
c3f6f71d | 3538 | procfs_prepare_to_store () |
c906108c | 3539 | { |
c3f6f71d JM |
3540 | #ifdef CHILD_PREPARE_TO_STORE |
3541 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3542 | #endif |
c906108c SS |
3543 | } |
3544 | ||
3545 | /* | |
c3f6f71d JM |
3546 | * store_registers |
3547 | * | |
3548 | * Since the /proc interface will not read individual registers, | |
3549 | * we will cache these requests until the process is resumed, and | |
3550 | * only then write them back to the inferior process. | |
3551 | * | |
3552 | * FIXME: is that a really bad idea? Have to think about cases | |
3553 | * where writing one register might affect the value of others, etc. | |
3554 | */ | |
c906108c | 3555 | |
c3f6f71d JM |
3556 | static void |
3557 | procfs_store_registers (regno) | |
3558 | int regno; | |
3559 | { | |
3560 | gdb_fpregset_t *fpregs; | |
3561 | gdb_gregset_t *gregs; | |
3562 | procinfo *pi; | |
3563 | int pid; | |
3564 | int tid; | |
c906108c | 3565 | |
c3f6f71d JM |
3566 | pid = PIDGET (inferior_pid); |
3567 | tid = TIDGET (inferior_pid); | |
c906108c | 3568 | |
c3f6f71d JM |
3569 | /* First find procinfo for main process */ |
3570 | pi = find_procinfo_or_die (pid, 0); | |
3571 | ||
3572 | /* If current lwp for process is not the same as requested thread | |
3573 | (ie. inferior_pid), then find procinfo for the requested thread. */ | |
3574 | ||
3575 | if ((tid != 0) && | |
3576 | (tid != proc_get_current_thread (pi))) | |
3577 | pi = find_procinfo_or_die (pid, tid); | |
3578 | ||
3579 | if (pi == NULL) | |
3580 | error ("procfs: store_registers: failed to find procinfo for %s", | |
3581 | target_pid_to_str (inferior_pid)); | |
c906108c | 3582 | |
c3f6f71d JM |
3583 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3584 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3585 | |
c3f6f71d JM |
3586 | fill_gregset (gregs, regno); |
3587 | if (!proc_set_gregs (pi)) | |
3588 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3589 | |
c3f6f71d JM |
3590 | #if defined (FP0_REGNUM) /* need floating point? */ |
3591 | if ((regno >= 0 && regno < FP0_REGNUM) || | |
3592 | regno == PC_REGNUM || | |
3593 | #ifdef NPC_REGNUM | |
3594 | regno == NPC_REGNUM || | |
3595 | #endif | |
3596 | regno == FP_REGNUM || | |
3597 | regno == SP_REGNUM) | |
3598 | return; /* not a floating point register */ | |
c906108c | 3599 | |
c3f6f71d JM |
3600 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3601 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
c906108c | 3602 | |
c3f6f71d JM |
3603 | fill_fpregset (fpregs, regno); |
3604 | if (!proc_set_fpregs (pi)) | |
3605 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3606 | #endif | |
3607 | } | |
c906108c | 3608 | |
c3f6f71d JM |
3609 | /* |
3610 | * Function: target_wait | |
3611 | * | |
3612 | * Retrieve the next stop event from the child process. | |
3613 | * If child has not stopped yet, wait for it to stop. | |
3614 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3615 | * into gdb internal event codes. | |
3616 | * | |
3617 | * Return: id of process (and possibly thread) that incurred the event. | |
3618 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3619 | */ |
3620 | ||
c3f6f71d JM |
3621 | static int |
3622 | procfs_wait (pid, status) | |
3623 | int pid; | |
3624 | struct target_waitstatus *status; | |
c906108c | 3625 | { |
c3f6f71d JM |
3626 | /* First cut: loosely based on original version 2.1 */ |
3627 | procinfo *pi; | |
3628 | int temp, wstat; | |
3629 | int retval; | |
3630 | int why, what, flags; | |
3631 | int retry = 0; | |
c906108c | 3632 | |
c3f6f71d | 3633 | wait_again: |
c906108c | 3634 | |
c3f6f71d JM |
3635 | retry++; |
3636 | wstat = 0; | |
3637 | retval = -1; | |
c906108c | 3638 | |
c3f6f71d JM |
3639 | /* Find procinfo for main process */ |
3640 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
3641 | if (pi) | |
c906108c | 3642 | { |
c3f6f71d JM |
3643 | /* We must assume that the status is stale now... */ |
3644 | pi->status_valid = 0; | |
3645 | pi->gregs_valid = 0; | |
3646 | pi->fpregs_valid = 0; | |
3647 | ||
3648 | #if 0 /* just try this out... */ | |
3649 | flags = proc_flags (pi); | |
3650 | why = proc_why (pi); | |
3651 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3652 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3653 | #endif | |
3654 | /* If child is not stopped, wait for it to stop. */ | |
3655 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3656 | !proc_wait_for_stop (pi)) | |
c906108c | 3657 | { |
c3f6f71d JM |
3658 | /* wait_for_stop failed: has the child terminated? */ |
3659 | if (errno == ENOENT) | |
c906108c | 3660 | { |
c3f6f71d JM |
3661 | /* /proc file not found; presumably child has terminated. */ |
3662 | retval = wait (&wstat); /* "wait" for the child's exit */ | |
3663 | ||
3664 | if (retval != PIDGET (inferior_pid)) /* wrong child? */ | |
3665 | error ("procfs: couldn't stop process %d: wait returned %d\n", | |
3666 | inferior_pid, retval); | |
3667 | /* FIXME: might I not just use waitpid? | |
3668 | Or try find_procinfo to see if I know about this child? */ | |
c906108c | 3669 | } |
c3f6f71d | 3670 | else |
c906108c | 3671 | { |
c3f6f71d JM |
3672 | /* Unknown error from wait_for_stop. */ |
3673 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3674 | } |
c3f6f71d JM |
3675 | } |
3676 | else | |
3677 | { | |
3678 | /* This long block is reached if either: | |
3679 | a) the child was already stopped, or | |
3680 | b) we successfully waited for the child with wait_for_stop. | |
3681 | This block will analyze the /proc status, and translate it | |
3682 | into a waitstatus for GDB. | |
3683 | ||
3684 | If we actually had to call wait because the /proc file | |
3685 | is gone (child terminated), then we skip this block, | |
3686 | because we already have a waitstatus. */ | |
3687 | ||
3688 | flags = proc_flags (pi); | |
3689 | why = proc_why (pi); | |
3690 | what = proc_what (pi); | |
3691 | ||
c3f6f71d | 3692 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3693 | { |
c3f6f71d JM |
3694 | #ifdef PR_ASYNC |
3695 | /* If it's running async (for single_thread control), | |
3696 | set it back to normal again. */ | |
3697 | if (flags & PR_ASYNC) | |
3698 | if (!proc_unset_async (pi)) | |
3699 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3700 | #endif | |
3701 | ||
3702 | if (info_verbose) | |
3703 | proc_prettyprint_why (why, what, 1); | |
3704 | ||
3705 | /* The 'pid' we will return to GDB is composed of | |
3706 | the process ID plus the lwp ID. */ | |
3707 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3708 | ||
3709 | switch (why) { | |
3710 | case PR_SIGNALLED: | |
3711 | wstat = (what << 8) | 0177; | |
3712 | break; | |
3713 | case PR_SYSENTRY: | |
3714 | switch (what) { | |
3715 | #ifdef SYS_lwp_exit | |
3716 | case SYS_lwp_exit: | |
3717 | #endif | |
3718 | #ifdef SYS_lwpexit | |
3719 | case SYS_lwpexit: | |
3720 | #endif | |
3721 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3722 | printf_filtered ("[%s exited]\n", | |
3723 | target_pid_to_str (retval)); | |
3724 | delete_thread (retval); | |
3725 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3726 | return retval; | |
3727 | #endif /* _lwp_exit */ | |
3728 | ||
3729 | case SYS_exit: | |
3730 | /* Handle SYS_exit call only */ | |
3731 | /* Stopped at entry to SYS_exit. | |
3732 | Make it runnable, resume it, then use | |
3733 | the wait system call to get its exit code. | |
3734 | Proc_run_process always clears the current | |
3735 | fault and signal. | |
3736 | Then return its exit status. */ | |
3737 | pi->status_valid = 0; | |
3738 | wstat = 0; | |
3739 | /* FIXME: what we should do is return | |
3740 | TARGET_WAITKIND_SPURIOUS. */ | |
3741 | if (!proc_run_process (pi, 0, 0)) | |
3742 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3743 | if (attach_flag) | |
3744 | { | |
3745 | /* Don't call wait: simulate waiting for exit, | |
3746 | return a "success" exit code. Bogus: what if | |
3747 | it returns something else? */ | |
3748 | wstat = 0; | |
3749 | retval = inferior_pid; /* ??? */ | |
3750 | } | |
3751 | else | |
3752 | { | |
3753 | int temp = wait (&wstat); | |
3754 | ||
3755 | /* FIXME: shouldn't I make sure I get the right | |
3756 | event from the right process? If (for | |
3757 | instance) I have killed an earlier inferior | |
3758 | process but failed to clean up after it | |
3759 | somehow, I could get its termination event | |
3760 | here. */ | |
3761 | ||
3762 | /* If wait returns -1, that's what we return to GDB. */ | |
3763 | if (temp < 0) | |
3764 | retval = temp; | |
3765 | } | |
3766 | break; | |
3767 | default: | |
3768 | printf_filtered ("procfs: trapped on entry to "); | |
3769 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3770 | printf_filtered ("\n"); | |
3771 | #ifndef PIOCSSPCACT | |
3772 | { | |
3773 | long i, nsysargs, *sysargs; | |
3774 | ||
3775 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3776 | (sysargs = proc_sysargs (pi)) != NULL) | |
3777 | { | |
0fda6bd2 | 3778 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3779 | for (i = 0; i < nsysargs; i++) |
0fda6bd2 | 3780 | printf_filtered ("#%ld: 0x%08x\n", |
c3f6f71d JM |
3781 | i, sysargs[i]); |
3782 | } | |
3783 | ||
3784 | } | |
3785 | #endif | |
3786 | if (status) | |
3787 | { | |
3788 | /* How to exit gracefully, returning "unknown event" */ | |
3789 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3790 | return inferior_pid; | |
3791 | } | |
3792 | else | |
3793 | { | |
3794 | /* How to keep going without returning to wfi: */ | |
3795 | target_resume (pid, 0, TARGET_SIGNAL_0); | |
3796 | goto wait_again; | |
3797 | } | |
3798 | break; | |
3799 | } | |
3800 | break; | |
3801 | case PR_SYSEXIT: | |
3802 | switch (what) { | |
3803 | #ifdef SYS_exec | |
3804 | case SYS_exec: | |
3805 | #endif | |
3806 | #ifdef SYS_execv | |
3807 | case SYS_execv: | |
3808 | #endif | |
3809 | #ifdef SYS_execve | |
3810 | case SYS_execve: | |
3811 | #endif | |
3812 | /* Hopefully this is our own "fork-child" execing | |
3813 | the real child. Hoax this event into a trap, and | |
3814 | GDB will see the child about to execute its start | |
3815 | address. */ | |
3816 | wstat = (SIGTRAP << 8) | 0177; | |
3817 | break; | |
3818 | #ifdef SYS_lwp_create | |
3819 | case SYS_lwp_create: | |
3820 | #endif | |
3821 | #ifdef SYS_lwpcreate | |
3822 | case SYS_lwpcreate: | |
3823 | #endif | |
3824 | #if defined(SYS_lwp_create) || defined(SYS_lwpcreate) | |
3825 | /* | |
3826 | * This syscall is somewhat like fork/exec. | |
3827 | * We will get the event twice: once for the parent LWP, | |
3828 | * and once for the child. We should already know about | |
3829 | * the parent LWP, but the child will be new to us. So, | |
3830 | * whenever we get this event, if it represents a new | |
3831 | * thread, simply add the thread to the list. | |
3832 | */ | |
3833 | ||
3834 | /* If not in procinfo list, add it. */ | |
3835 | temp = proc_get_current_thread (pi); | |
3836 | if (!find_procinfo (pi->pid, temp)) | |
3837 | create_procinfo (pi->pid, temp); | |
3838 | ||
3839 | temp = MERGEPID (pi->pid, temp); | |
3840 | /* If not in GDB's thread list, add it. */ | |
3841 | if (!in_thread_list (temp)) | |
3842 | { | |
3843 | printf_filtered ("[New %s]\n", target_pid_to_str (temp)); | |
3844 | add_thread (temp); | |
3845 | } | |
3846 | /* Return to WFI, but tell it to immediately resume. */ | |
3847 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3848 | return inferior_pid; | |
3849 | #endif /* _lwp_create */ | |
c906108c | 3850 | |
c3f6f71d JM |
3851 | #ifdef SYS_lwp_exit |
3852 | case SYS_lwp_exit: | |
3853 | #endif | |
3854 | #ifdef SYS_lwpexit | |
3855 | case SYS_lwpexit: | |
3856 | #endif | |
3857 | #if defined (SYS_lwp_exit) || defined (SYS_lwpexit) | |
3858 | printf_filtered ("[%s exited]\n", | |
3859 | target_pid_to_str (retval)); | |
3860 | delete_thread (retval); | |
3861 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3862 | return retval; | |
3863 | #endif /* _lwp_exit */ | |
3864 | ||
3865 | #ifdef SYS_sproc | |
3866 | case SYS_sproc: | |
3867 | /* Nothing to do here for now. The old procfs | |
3868 | seemed to use this event to handle threads on | |
3869 | older (non-LWP) systems, where I'm assuming that | |
3870 | threads were actually separate processes. Irix, | |
3871 | maybe? Anyway, low priority for now. */ | |
3872 | #endif | |
3873 | #ifdef SYS_fork | |
3874 | case SYS_fork: | |
3875 | /* FIXME: do we need to handle this? Investigate. */ | |
3876 | #endif | |
3877 | #ifdef SYS_vfork | |
3878 | case SYS_vfork: | |
3879 | /* FIXME: see above. */ | |
3880 | #endif | |
3881 | default: | |
3882 | printf_filtered ("procfs: trapped on exit from "); | |
3883 | proc_prettyprint_syscall (proc_what (pi), 0); | |
3884 | printf_filtered ("\n"); | |
3885 | #ifndef PIOCSSPCACT | |
3886 | { | |
3887 | long i, nsysargs, *sysargs; | |
3888 | ||
3889 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3890 | (sysargs = proc_sysargs (pi)) != NULL) | |
3891 | { | |
0fda6bd2 | 3892 | printf_filtered ("%ld syscall arguments:\n", nsysargs); |
c3f6f71d | 3893 | for (i = 0; i < nsysargs; i++) |
0fda6bd2 | 3894 | printf_filtered ("#%ld: 0x%08x\n", |
c3f6f71d JM |
3895 | i, sysargs[i]); |
3896 | } | |
3897 | } | |
3898 | #endif | |
3899 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3900 | return inferior_pid; | |
3901 | } | |
3902 | break; | |
3903 | case PR_REQUESTED: | |
3904 | #if 0 /* FIXME */ | |
3905 | wstat = (SIGSTOP << 8) | 0177; | |
3906 | break; | |
3907 | #else | |
3908 | if (retry < 5) | |
3909 | { | |
3910 | printf_filtered ("Retry #%d:\n", retry); | |
3911 | pi->status_valid = 0; | |
3912 | goto wait_again; | |
3913 | } | |
3914 | else | |
3915 | { | |
3916 | /* If not in procinfo list, add it. */ | |
3917 | temp = proc_get_current_thread (pi); | |
3918 | if (!find_procinfo (pi->pid, temp)) | |
3919 | create_procinfo (pi->pid, temp); | |
3920 | ||
3921 | /* If not in GDB's thread list, add it. */ | |
3922 | temp = MERGEPID (pi->pid, temp); | |
3923 | if (!in_thread_list (temp)) | |
3924 | { | |
0d06e24b | 3925 | printf_filtered ("[New %s]\n", |
c3f6f71d JM |
3926 | target_pid_to_str (temp)); |
3927 | add_thread (temp); | |
3928 | } | |
3929 | ||
3930 | status->kind = TARGET_WAITKIND_STOPPED; | |
3931 | status->value.sig = 0; | |
3932 | return retval; | |
3933 | } | |
3934 | #endif | |
3935 | case PR_JOBCONTROL: | |
3936 | wstat = (what << 8) | 0177; | |
3937 | break; | |
3938 | case PR_FAULTED: | |
3939 | switch (what) { /* FIXME: FAULTED_USE_SIGINFO */ | |
3940 | #ifdef FLTWATCH | |
3941 | case FLTWATCH: | |
3942 | wstat = (SIGTRAP << 8) | 0177; | |
3943 | break; | |
3944 | #endif | |
3945 | #ifdef FLTKWATCH | |
3946 | case FLTKWATCH: | |
3947 | wstat = (SIGTRAP << 8) | 0177; | |
3948 | break; | |
3949 | #endif | |
3950 | /* FIXME: use si_signo where possible. */ | |
3951 | case FLTPRIV: | |
3952 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
3953 | case FLTILL: | |
3954 | #endif | |
3955 | wstat = (SIGILL << 8) | 0177; | |
3956 | break; | |
3957 | case FLTBPT: | |
3958 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
3959 | case FLTTRACE: | |
3960 | #endif | |
3961 | wstat = (SIGTRAP << 8) | 0177; | |
3962 | break; | |
3963 | case FLTSTACK: | |
3964 | case FLTACCESS: | |
3965 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
3966 | case FLTBOUNDS: | |
3967 | #endif | |
3968 | wstat = (SIGSEGV << 8) | 0177; | |
3969 | break; | |
3970 | case FLTIOVF: | |
3971 | case FLTIZDIV: | |
3972 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
3973 | case FLTFPE: | |
3974 | #endif | |
3975 | wstat = (SIGFPE << 8) | 0177; | |
3976 | break; | |
3977 | case FLTPAGE: /* Recoverable page fault */ | |
3978 | default: /* FIXME: use si_signo if possible for fault */ | |
3979 | retval = -1; | |
3980 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3981 | printf_filtered ("child stopped for unknown reason:\n"); | |
3982 | proc_prettyprint_why (why, what, 1); | |
3983 | error ("... giving up..."); | |
3984 | break; | |
3985 | } | |
3986 | break; /* case PR_FAULTED: */ | |
3987 | default: /* switch (why) unmatched */ | |
3988 | printf_filtered ("procfs:%d -- ", __LINE__); | |
3989 | printf_filtered ("child stopped for unknown reason:\n"); | |
3990 | proc_prettyprint_why (why, what, 1); | |
3991 | error ("... giving up..."); | |
3992 | break; | |
3993 | } | |
3994 | /* | |
3995 | * Got this far without error: | |
3996 | * If retval isn't in the threads database, add it. | |
3997 | */ | |
3998 | if (retval > 0 && | |
3999 | retval != inferior_pid && | |
4000 | !in_thread_list (retval)) | |
c906108c | 4001 | { |
c3f6f71d JM |
4002 | /* |
4003 | * We have a new thread. | |
4004 | * We need to add it both to GDB's list and to our own. | |
4005 | * If we don't create a procinfo, resume may be unhappy | |
4006 | * later. | |
4007 | */ | |
4008 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
4009 | add_thread (retval); | |
4010 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4011 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
4012 | ||
4013 | /* In addition, it's possible that this is the first | |
4014 | * new thread we've seen, in which case we may not | |
4015 | * have created entries for inferior_pid yet. | |
4016 | */ | |
4017 | if (TIDGET (inferior_pid) != 0) | |
4018 | { | |
4019 | if (!in_thread_list (inferior_pid)) | |
4020 | add_thread (inferior_pid); | |
4021 | if (find_procinfo (PIDGET (inferior_pid), | |
4022 | TIDGET (inferior_pid)) == NULL) | |
4023 | create_procinfo (PIDGET (inferior_pid), | |
4024 | TIDGET (inferior_pid)); | |
4025 | } | |
c906108c | 4026 | } |
c906108c | 4027 | } |
c3f6f71d | 4028 | else /* flags do not indicate STOPPED */ |
c906108c | 4029 | { |
c3f6f71d JM |
4030 | /* surely this can't happen... */ |
4031 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4032 | __LINE__); | |
4033 | proc_prettyprint_flags (flags, 1); | |
4034 | error ("procfs: ...giving up..."); | |
c906108c | 4035 | } |
c906108c | 4036 | } |
c906108c | 4037 | |
c3f6f71d JM |
4038 | if (status) |
4039 | store_waitstatus (status, wstat); | |
c906108c SS |
4040 | } |
4041 | ||
c3f6f71d JM |
4042 | return retval; |
4043 | } | |
c906108c | 4044 | |
c3f6f71d JM |
4045 | static int |
4046 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) | |
4047 | CORE_ADDR memaddr; | |
4048 | char *myaddr; | |
4049 | int len; | |
4050 | int dowrite; | |
4051 | struct target_ops *target; /* ignored */ | |
4052 | { | |
4053 | procinfo *pi; | |
4054 | int nbytes = 0; | |
c906108c | 4055 | |
c3f6f71d JM |
4056 | /* Find procinfo for main process */ |
4057 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4058 | if (pi->as_fd == 0 && | |
4059 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4060 | { |
c3f6f71d JM |
4061 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4062 | return 0; | |
c906108c | 4063 | } |
c906108c | 4064 | |
c3f6f71d | 4065 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4066 | { |
c3f6f71d | 4067 | if (dowrite) |
c906108c | 4068 | { |
c3f6f71d JM |
4069 | #ifdef NEW_PROC_API |
4070 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4071 | #else |
c3f6f71d | 4072 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4073 | #endif |
c3f6f71d | 4074 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4075 | } |
c3f6f71d | 4076 | else |
c906108c | 4077 | { |
c3f6f71d JM |
4078 | PROCFS_NOTE ("read memory: \n"); |
4079 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4080 | } |
c3f6f71d | 4081 | if (nbytes < 0) |
c906108c | 4082 | { |
c3f6f71d | 4083 | nbytes = 0; |
c906108c | 4084 | } |
c906108c | 4085 | } |
c3f6f71d | 4086 | return nbytes; |
c906108c SS |
4087 | } |
4088 | ||
4089 | /* | |
c3f6f71d JM |
4090 | * Function: invalidate_cache |
4091 | * | |
4092 | * Called by target_resume before making child runnable. | |
4093 | * Mark cached registers and status's invalid. | |
4094 | * If there are "dirty" caches that need to be written back | |
4095 | * to the child process, do that. | |
4096 | * | |
4097 | * File descriptors are also cached. | |
4098 | * As they are a limited resource, we cannot hold onto them indefinitely. | |
4099 | * However, as they are expensive to open, we don't want to throw them | |
4100 | * away indescriminately either. As a compromise, we will keep the | |
4101 | * file descriptors for the parent process, but discard any file | |
4102 | * descriptors we may have accumulated for the threads. | |
4103 | * | |
4104 | * Return value: | |
4105 | * As this function is called by iterate_over_threads, it always | |
4106 | * returns zero (so that iterate_over_threads will keep iterating). | |
c906108c SS |
4107 | */ |
4108 | ||
c3f6f71d JM |
4109 | |
4110 | static int | |
4111 | invalidate_cache (parent, pi, ptr) | |
4112 | procinfo *parent; | |
4113 | procinfo *pi; | |
4114 | void *ptr; | |
c906108c | 4115 | { |
c3f6f71d JM |
4116 | /* |
4117 | * About to run the child; invalidate caches and do any other cleanup. | |
4118 | */ | |
c906108c | 4119 | |
c3f6f71d JM |
4120 | #if 0 |
4121 | if (pi->gregs_dirty) | |
4122 | if (parent == NULL || | |
4123 | proc_get_current_thread (parent) != pi->tid) | |
4124 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4125 | proc_warn (pi, "target_resume, set_gregs", | |
4126 | __LINE__); | |
4127 | #ifdef FP0_REGNUM | |
4128 | if (pi->fpregs_dirty) | |
4129 | if (parent == NULL || | |
4130 | proc_get_current_thread (parent) != pi->tid) | |
4131 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
4132 | proc_warn (pi, "target_resume, set_fpregs", | |
4133 | __LINE__); | |
c906108c | 4134 | #endif |
c906108c | 4135 | #endif |
c906108c | 4136 | |
c3f6f71d | 4137 | if (parent != NULL) |
c906108c | 4138 | { |
c3f6f71d JM |
4139 | /* The presence of a parent indicates that this is an LWP. |
4140 | Close any file descriptors that it might have open. | |
4141 | We don't do this to the master (parent) procinfo. */ | |
4142 | ||
4143 | close_procinfo_files (pi); | |
c906108c | 4144 | } |
c3f6f71d JM |
4145 | pi->gregs_valid = 0; |
4146 | pi->fpregs_valid = 0; | |
4147 | #if 0 | |
4148 | pi->gregs_dirty = 0; | |
4149 | pi->fpregs_dirty = 0; | |
c906108c | 4150 | #endif |
c3f6f71d JM |
4151 | pi->status_valid = 0; |
4152 | pi->threads_valid = 0; | |
c906108c | 4153 | |
c3f6f71d | 4154 | return 0; |
c906108c SS |
4155 | } |
4156 | ||
0fda6bd2 | 4157 | #if 0 |
c906108c | 4158 | /* |
c3f6f71d JM |
4159 | * Function: make_signal_thread_runnable |
4160 | * | |
4161 | * A callback function for iterate_over_threads. | |
4162 | * Find the asynchronous signal thread, and make it runnable. | |
4163 | * See if that helps matters any. | |
c906108c SS |
4164 | */ |
4165 | ||
c3f6f71d JM |
4166 | static int |
4167 | make_signal_thread_runnable (process, pi, ptr) | |
4168 | procinfo *process; | |
4169 | procinfo *pi; | |
4170 | void *ptr; | |
c906108c | 4171 | { |
c3f6f71d JM |
4172 | #ifdef PR_ASLWP |
4173 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4174 | { |
c3f6f71d JM |
4175 | if (!proc_run_process (pi, 0, -1)) |
4176 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4177 | return 1; | |
c906108c | 4178 | } |
c906108c | 4179 | #endif |
c3f6f71d | 4180 | return 0; |
c906108c | 4181 | } |
0fda6bd2 | 4182 | #endif |
c906108c SS |
4183 | |
4184 | /* | |
c3f6f71d JM |
4185 | * Function: target_resume |
4186 | * | |
4187 | * Make the child process runnable. Normally we will then call | |
4188 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4189 | * | |
4190 | * Arguments: | |
4191 | * step: if true, then arrange for the child to stop again | |
4192 | * after executing a single instruction. | |
4193 | * signo: if zero, then cancel any pending signal. | |
4194 | * If non-zero, then arrange for the indicated signal | |
4195 | * to be delivered to the child when it runs. | |
4196 | * pid: if -1, then allow any child thread to run. | |
4197 | * if non-zero, then allow only the indicated thread to run. | |
4198 | ******* (not implemented yet) | |
c906108c SS |
4199 | */ |
4200 | ||
4201 | static void | |
c3f6f71d JM |
4202 | procfs_resume (pid, step, signo) |
4203 | int pid; | |
4204 | int step; | |
4205 | enum target_signal signo; | |
c906108c | 4206 | { |
c3f6f71d JM |
4207 | procinfo *pi, *thread; |
4208 | int native_signo; | |
4209 | ||
4210 | /* 2.1: | |
4211 | prrun.prflags |= PRSVADDR; | |
4212 | prrun.pr_vaddr = $PC; set resume address | |
4213 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) | |
4214 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) | |
4215 | prrun.prflags |= PRCFAULT; clear current fault. | |
4216 | ||
4217 | PRSTRACE and PRSFAULT can be done by other means | |
4218 | (proc_trace_signals, proc_trace_faults) | |
4219 | PRSVADDR is unnecessary. | |
4220 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4221 | This basically leaves PRSTEP and PRCSIG. | |
4222 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4223 | So basically PR_STEP is the sole argument that must be passed | |
4224 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4225 | ||
4226 | /* Find procinfo for main process */ | |
4227 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4228 | ||
4229 | /* First cut: ignore pid argument */ | |
4230 | errno = 0; | |
c906108c | 4231 | |
c3f6f71d JM |
4232 | /* Convert signal to host numbering. */ |
4233 | if (signo == 0 || | |
0fda6bd2 | 4234 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4235 | native_signo = 0; |
4236 | else | |
4237 | native_signo = target_signal_to_host (signo); | |
c906108c | 4238 | |
c3f6f71d | 4239 | pi->ignore_next_sigstop = 0; |
c906108c | 4240 | |
c3f6f71d JM |
4241 | /* Running the process voids all cached registers and status. */ |
4242 | /* Void the threads' caches first */ | |
4243 | proc_iterate_over_threads (pi, invalidate_cache, NULL); | |
4244 | /* Void the process procinfo's caches. */ | |
4245 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4246 | |
c3f6f71d | 4247 | if (pid != -1) |
c906108c | 4248 | { |
c3f6f71d JM |
4249 | /* Resume a specific thread, presumably suppressing the others. */ |
4250 | thread = find_procinfo (PIDGET (pid), TIDGET (pid)); | |
4251 | if (thread == NULL) | |
4252 | warning ("procfs: resume can't find thread %d -- resuming all.", | |
4253 | TIDGET (pid)); | |
4254 | else | |
c906108c | 4255 | { |
c3f6f71d JM |
4256 | if (thread->tid != 0) |
4257 | { | |
4258 | /* We're to resume a specific thread, and not the others. | |
4259 | * Set the child process's PR_ASYNC flag. | |
4260 | */ | |
4261 | #ifdef PR_ASYNC | |
4262 | if (!proc_set_async (pi)) | |
4263 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4264 | #endif | |
4265 | #if 0 | |
4266 | proc_iterate_over_threads (pi, | |
4267 | make_signal_thread_runnable, | |
4268 | NULL); | |
4269 | #endif | |
4270 | pi = thread; /* substitute the thread's procinfo for run */ | |
4271 | } | |
c906108c SS |
4272 | } |
4273 | } | |
c906108c | 4274 | |
c3f6f71d | 4275 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4276 | { |
c3f6f71d JM |
4277 | if (errno == EBUSY) |
4278 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4279 | else | |
4280 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4281 | } |
c3f6f71d | 4282 | } |
c906108c | 4283 | |
c3f6f71d JM |
4284 | /* |
4285 | * Function: register_gdb_signals | |
4286 | * | |
4287 | * Traverse the list of signals that GDB knows about | |
4288 | * (see "handle" command), and arrange for the target | |
4289 | * to be stopped or not, according to these settings. | |
4290 | * | |
4291 | * Returns non-zero for success, zero for failure. | |
4292 | */ | |
c906108c | 4293 | |
c3f6f71d JM |
4294 | static int |
4295 | register_gdb_signals (pi, signals) | |
4296 | procinfo *pi; | |
4297 | sigset_t *signals; | |
4298 | { | |
4299 | int signo; | |
c906108c | 4300 | |
c3f6f71d JM |
4301 | for (signo = 0; signo < NSIG; signo ++) |
4302 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4303 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4304 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4305 | prdelset (signals, signo); | |
4306 | else | |
4307 | praddset (signals, signo); | |
c906108c | 4308 | |
c3f6f71d | 4309 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4310 | } |
4311 | ||
4312 | /* | |
c3f6f71d JM |
4313 | * Function: target_notice_signals |
4314 | * | |
4315 | * Set up to trace signals in the child process. | |
4316 | */ | |
c906108c | 4317 | |
c3f6f71d JM |
4318 | static void |
4319 | procfs_notice_signals (pid) | |
4320 | int pid; | |
4321 | { | |
4322 | sigset_t signals; | |
4323 | procinfo *pi = find_procinfo_or_die (PIDGET (pid), 0); | |
c906108c | 4324 | |
c3f6f71d JM |
4325 | if (proc_get_traced_signals (pi, &signals) && |
4326 | register_gdb_signals (pi, &signals)) | |
4327 | return; | |
4328 | else | |
4329 | proc_error (pi, "notice_signals", __LINE__); | |
4330 | } | |
c906108c | 4331 | |
c3f6f71d JM |
4332 | /* |
4333 | * Function: target_files_info | |
4334 | * | |
4335 | * Print status information about the child process. | |
4336 | */ | |
c906108c | 4337 | |
c3f6f71d JM |
4338 | static void |
4339 | procfs_files_info (ignore) | |
4340 | struct target_ops *ignore; | |
4341 | { | |
4342 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
4343 | attach_flag? "attached": "child", | |
4344 | target_pid_to_str (inferior_pid)); | |
4345 | } | |
c906108c | 4346 | |
c3f6f71d JM |
4347 | /* |
4348 | * Function: target_open | |
4349 | * | |
4350 | * A dummy: you don't open procfs. | |
c906108c SS |
4351 | */ |
4352 | ||
4353 | static void | |
c3f6f71d JM |
4354 | procfs_open (args, from_tty) |
4355 | char *args; | |
4356 | int from_tty; | |
c906108c | 4357 | { |
c3f6f71d JM |
4358 | error ("Use the \"run\" command to start a Unix child process."); |
4359 | } | |
c906108c | 4360 | |
c3f6f71d JM |
4361 | /* |
4362 | * Function: target_can_run | |
4363 | * | |
4364 | * This tells GDB that this target vector can be invoked | |
4365 | * for "run" or "attach". | |
4366 | */ | |
c906108c | 4367 | |
c3f6f71d JM |
4368 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4369 | be a runnable target. Used by targets | |
4370 | that can sit atop procfs, such as solaris | |
4371 | thread support. */ | |
c906108c | 4372 | |
c906108c | 4373 | |
c3f6f71d JM |
4374 | static int |
4375 | procfs_can_run () | |
4376 | { | |
4377 | /* This variable is controlled by modules that sit atop procfs that | |
4378 | may layer their own process structure atop that provided here. | |
4379 | sol-thread.c does this because of the Solaris two-level thread | |
4380 | model. */ | |
4381 | ||
4382 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ | |
c906108c | 4383 | |
c3f6f71d JM |
4384 | return !procfs_suppress_run; |
4385 | } | |
c906108c | 4386 | |
c3f6f71d JM |
4387 | /* |
4388 | * Function: target_stop | |
4389 | * | |
4390 | * Stop the child process asynchronously, as when the | |
4391 | * gdb user types control-c or presses a "stop" button. | |
4392 | * | |
4393 | * Works by sending kill(SIGINT) to the child's process group. | |
4394 | */ | |
c906108c | 4395 | |
c3f6f71d JM |
4396 | static void |
4397 | procfs_stop () | |
4398 | { | |
4399 | extern pid_t inferior_process_group; | |
c906108c | 4400 | |
c3f6f71d | 4401 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4402 | } |
4403 | ||
c906108c | 4404 | /* |
c3f6f71d JM |
4405 | * Function: unconditionally_kill_inferior |
4406 | * | |
4407 | * Make it die. Wait for it to die. Clean up after it. | |
4408 | * Note: this should only be applied to the real process, | |
4409 | * not to an LWP, because of the check for parent-process. | |
4410 | * If we need this to work for an LWP, it needs some more logic. | |
4411 | */ | |
c906108c | 4412 | |
c3f6f71d JM |
4413 | static void |
4414 | unconditionally_kill_inferior (pi) | |
4415 | procinfo *pi; | |
4416 | { | |
4417 | int parent_pid; | |
c906108c | 4418 | |
c3f6f71d JM |
4419 | parent_pid = proc_parent_pid (pi); |
4420 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4421 | /* FIXME: use access functions */ | |
4422 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4423 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4424 | file for the inferior. */ | |
4425 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4426 | { | |
4427 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4428 | } | |
4429 | #endif | |
4430 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4431 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4432 | to kill the inferior, otherwise it might remain stopped with a | |
4433 | pending SIGKILL. | |
4434 | We do not check the result of the PIOCSSIG, the inferior might have | |
4435 | died already. */ | |
4436 | { | |
4437 | struct siginfo newsiginfo; | |
c906108c | 4438 | |
c3f6f71d JM |
4439 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4440 | newsiginfo.si_signo = SIGKILL; | |
4441 | newsiginfo.si_code = 0; | |
4442 | newsiginfo.si_errno = 0; | |
4443 | newsiginfo.si_pid = getpid (); | |
4444 | newsiginfo.si_uid = getuid (); | |
4445 | /* FIXME: use proc_set_current_signal */ | |
4446 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4447 | } | |
4448 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4449 | if (!proc_kill (pi, SIGKILL)) | |
4450 | proc_warn (pi, "unconditionally_kill, proc_kill", __LINE__); | |
4451 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4452 | destroy_procinfo (pi); | |
c906108c | 4453 | |
c3f6f71d JM |
4454 | /* If pi is GDB's child, wait for it to die. */ |
4455 | if (parent_pid == getpid ()) | |
4456 | /* FIXME: should we use waitpid to make sure we get the right event? | |
4457 | Should we check the returned event? */ | |
4458 | { | |
0d06e24b | 4459 | #if 0 |
c3f6f71d | 4460 | int status, ret; |
c906108c | 4461 | |
c3f6f71d JM |
4462 | ret = waitpid (pi->pid, &status, 0); |
4463 | #else | |
4464 | wait (NULL); | |
4465 | #endif | |
4466 | } | |
4467 | } | |
c906108c | 4468 | |
c3f6f71d JM |
4469 | /* |
4470 | * Function: target_kill_inferior | |
4471 | * | |
4472 | * We're done debugging it, and we want it to go away. | |
4473 | * Then we want GDB to forget all about it. | |
c906108c SS |
4474 | */ |
4475 | ||
c3f6f71d JM |
4476 | static void |
4477 | procfs_kill_inferior () | |
c906108c | 4478 | { |
c3f6f71d JM |
4479 | if (inferior_pid != 0) /* ? */ |
4480 | { | |
4481 | /* Find procinfo for main process */ | |
4482 | procinfo *pi = find_procinfo (PIDGET (inferior_pid), 0); | |
c906108c | 4483 | |
c3f6f71d JM |
4484 | if (pi) |
4485 | unconditionally_kill_inferior (pi); | |
4486 | target_mourn_inferior (); | |
c906108c | 4487 | } |
c3f6f71d JM |
4488 | } |
4489 | ||
4490 | /* | |
4491 | * Function: target_mourn_inferior | |
4492 | * | |
4493 | * Forget we ever debugged this thing! | |
4494 | */ | |
c906108c | 4495 | |
c3f6f71d JM |
4496 | static void |
4497 | procfs_mourn_inferior () | |
4498 | { | |
4499 | procinfo *pi; | |
c906108c | 4500 | |
c3f6f71d JM |
4501 | if (inferior_pid != 0) |
4502 | { | |
4503 | /* Find procinfo for main process */ | |
4504 | pi = find_procinfo (PIDGET (inferior_pid), 0); | |
4505 | if (pi) | |
4506 | destroy_procinfo (pi); | |
c906108c | 4507 | } |
c3f6f71d JM |
4508 | unpush_target (&procfs_ops); |
4509 | generic_mourn_inferior (); | |
4510 | } | |
c906108c | 4511 | |
c3f6f71d JM |
4512 | /* |
4513 | * Function: init_inferior | |
4514 | * | |
4515 | * When GDB forks to create a runnable inferior process, | |
4516 | * this function is called on the parent side of the fork. | |
4517 | * It's job is to do whatever is necessary to make the child | |
4518 | * ready to be debugged, and then wait for the child to synchronize. | |
4519 | */ | |
c906108c | 4520 | |
c3f6f71d JM |
4521 | static void |
4522 | procfs_init_inferior (pid) | |
4523 | int pid; | |
4524 | { | |
4525 | procinfo *pi; | |
4526 | sigset_t signals; | |
4527 | int fail; | |
c906108c | 4528 | |
c3f6f71d JM |
4529 | /* This routine called on the parent side (GDB side) |
4530 | after GDB forks the inferior. */ | |
c906108c | 4531 | |
c3f6f71d | 4532 | push_target (&procfs_ops); |
c906108c | 4533 | |
c3f6f71d JM |
4534 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4535 | perror ("procfs: out of memory in 'init_inferior'"); | |
4536 | ||
4537 | if (!open_procinfo_files (pi, FD_CTL)) | |
4538 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4539 | ||
4540 | /* | |
4541 | xmalloc // done | |
4542 | open_procinfo_files // done | |
4543 | link list // done | |
4544 | prfillset (trace) | |
4545 | procfs_notice_signals | |
4546 | prfillset (fault) | |
4547 | prdelset (FLTPAGE) | |
4548 | PIOCWSTOP | |
4549 | PIOCSFAULT | |
4550 | */ | |
4551 | ||
4552 | /* If not stopped yet, wait for it to stop. */ | |
4553 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4554 | !(proc_wait_for_stop (pi))) | |
4555 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4556 | ||
4557 | /* Save some of the /proc state to be restored if we detach. */ | |
4558 | /* FIXME: Why? In case another debugger was debugging it? | |
4559 | We're it's parent, for Ghu's sake! */ | |
4560 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4561 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4562 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4563 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4564 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4565 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
4566 | if (!proc_get_traced_sysentry (pi, &pi->saved_entryset)) | |
4567 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); | |
4568 | if (!proc_get_traced_sysexit (pi, &pi->saved_exitset)) | |
4569 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); | |
4570 | ||
4571 | /* Register to trace selected signals in the child. */ | |
4572 | prfillset (&signals); | |
4573 | if (!register_gdb_signals (pi, &signals)) | |
4574 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4575 | ||
4576 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4577 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4578 | ||
0d06e24b JM |
4579 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4580 | and possibly even turning ON kill-on-last-close at this point. But | |
4581 | I can't make that change without careful testing which I don't have | |
4582 | time to do right now... */ | |
c3f6f71d JM |
4583 | /* Turn on run-on-last-close flag so that the child |
4584 | will die if GDB goes away for some reason. */ | |
4585 | if (!proc_set_run_on_last_close (pi)) | |
4586 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4587 | ||
4588 | /* The 'process ID' we return to GDB is composed of | |
4589 | the actual process ID plus the lwp ID. */ | |
4590 | inferior_pid = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c | 4591 | |
c3f6f71d JM |
4592 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4593 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4594 | #else | |
4595 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4596 | startup_inferior (2); | |
0d06e24b | 4597 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4598 | } |
c906108c | 4599 | |
c3f6f71d JM |
4600 | /* |
4601 | * Function: set_exec_trap | |
4602 | * | |
4603 | * When GDB forks to create a new process, this function is called | |
4604 | * on the child side of the fork before GDB exec's the user program. | |
4605 | * Its job is to make the child minimally debuggable, so that the | |
4606 | * parent GDB process can connect to the child and take over. | |
4607 | * This function should do only the minimum to make that possible, | |
4608 | * and to synchronize with the parent process. The parent process | |
4609 | * should take care of the details. | |
4610 | */ | |
4611 | ||
4612 | static void | |
4613 | procfs_set_exec_trap () | |
4614 | { | |
4615 | /* This routine called on the child side (inferior side) | |
4616 | after GDB forks the inferior. It must use only local variables, | |
4617 | because it may be sharing data space with its parent. */ | |
c906108c | 4618 | |
c3f6f71d JM |
4619 | procinfo *pi; |
4620 | sysset_t exitset; | |
c906108c | 4621 | |
c3f6f71d JM |
4622 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4623 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4624 | |
c3f6f71d JM |
4625 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4626 | { | |
4627 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4628 | gdb_flush (gdb_stderr); | |
4629 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4630 | _exit (127); | |
4631 | } | |
c906108c | 4632 | |
c3f6f71d JM |
4633 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4634 | /* OSF method for tracing exec syscalls. Quoting: | |
4635 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4636 | exits from exec system calls because of the user level loader. */ | |
4637 | /* FIXME: make nice and maybe move into an access function. */ | |
4638 | { | |
4639 | int prfs_flags; | |
c906108c | 4640 | |
c3f6f71d JM |
4641 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4642 | { | |
4643 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4644 | gdb_flush (gdb_stderr); | |
4645 | _exit (127); | |
4646 | } | |
4647 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4648 | |
c3f6f71d JM |
4649 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4650 | { | |
4651 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4652 | gdb_flush (gdb_stderr); | |
4653 | _exit (127); | |
4654 | } | |
4655 | } | |
4656 | #else /* not PRFS_STOPEXEC */ | |
4657 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4658 | /* GW: Rationale... | |
4659 | Not all systems with /proc have all the exec* syscalls with the same | |
4660 | names. On the SGI, for example, there is no SYS_exec, but there | |
4661 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4662 | |
c3f6f71d JM |
4663 | premptyset (&exitset); |
4664 | #ifdef SYS_exec | |
4665 | praddset (&exitset, SYS_exec); | |
4666 | #endif | |
4667 | #ifdef SYS_execve | |
4668 | praddset (&exitset, SYS_execve); | |
4669 | #endif | |
4670 | #ifdef SYS_execv | |
4671 | praddset (&exitset, SYS_execv); | |
c906108c | 4672 | #endif |
c906108c | 4673 | |
c3f6f71d | 4674 | if (!proc_set_traced_sysexit (pi, &exitset)) |
c906108c | 4675 | { |
c3f6f71d JM |
4676 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4677 | gdb_flush (gdb_stderr); | |
4678 | _exit (127); | |
c906108c | 4679 | } |
c3f6f71d JM |
4680 | #endif /* PRFS_STOPEXEC */ |
4681 | ||
4682 | /* FIXME: should this be done in the parent instead? */ | |
4683 | /* Turn off inherit on fork flag so that all grand-children | |
4684 | of gdb start with tracing flags cleared. */ | |
4685 | if (!proc_unset_inherit_on_fork (pi)) | |
4686 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4687 | ||
4688 | /* Turn off run on last close flag, so that the child process | |
4689 | cannot run away just because we close our handle on it. | |
4690 | We want it to wait for the parent to attach. */ | |
4691 | if (!proc_unset_run_on_last_close (pi)) | |
4692 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4693 | ||
4694 | /* FIXME: No need to destroy the procinfo -- | |
4695 | we have our own address space, and we're about to do an exec! */ | |
4696 | /*destroy_procinfo (pi);*/ | |
c906108c | 4697 | } |
c906108c | 4698 | |
c3f6f71d JM |
4699 | /* |
4700 | * Function: create_inferior | |
4701 | * | |
4702 | * This function is called BEFORE gdb forks the inferior process. | |
4703 | * Its only real responsibility is to set things up for the fork, | |
4704 | * and tell GDB which two functions to call after the fork (one | |
4705 | * for the parent, and one for the child). | |
4706 | * | |
4707 | * This function does a complicated search for a unix shell program, | |
4708 | * which it then uses to parse arguments and environment variables | |
4709 | * to be sent to the child. I wonder whether this code could not | |
4710 | * be abstracted out and shared with other unix targets such as | |
4711 | * infptrace? | |
4712 | */ | |
c906108c SS |
4713 | |
4714 | static void | |
4715 | procfs_create_inferior (exec_file, allargs, env) | |
4716 | char *exec_file; | |
4717 | char *allargs; | |
4718 | char **env; | |
4719 | { | |
4720 | char *shell_file = getenv ("SHELL"); | |
4721 | char *tryname; | |
4722 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4723 | { | |
4724 | ||
4725 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4726 | just do this the normal way (via execlp, which operates by |
4727 | attempting an exec for each element of the PATH until it | |
4728 | finds one which succeeds), then there will be an exec for | |
4729 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4730 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4731 | for these failed execs with the ones for successful execs | |
4732 | (whether the exec has succeeded is stored at that time in the | |
4733 | carry bit or some such architecture-specific and | |
4734 | non-ABI-specified place). | |
4735 | ||
4736 | So I can't think of anything better than to search the PATH | |
4737 | now. This has several disadvantages: (1) There is a race | |
4738 | condition; if we find a file now and it is deleted before we | |
4739 | exec it, we lose, even if the deletion leaves a valid file | |
4740 | further down in the PATH, (2) there is no way to know exactly | |
4741 | what an executable (in the sense of "capable of being | |
4742 | exec'd") file is. Using access() loses because it may lose | |
4743 | if the caller is the superuser; failing to use it loses if | |
4744 | there are ACLs or some such. */ | |
c906108c SS |
4745 | |
4746 | char *p; | |
4747 | char *p1; | |
4748 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4749 | path is used from within GDB. */ |
c906108c SS |
4750 | char *path = getenv ("PATH"); |
4751 | int len; | |
4752 | struct stat statbuf; | |
4753 | ||
4754 | if (path == NULL) | |
4755 | path = "/bin:/usr/bin"; | |
4756 | ||
4757 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4758 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4759 | { |
4760 | p1 = strchr (p, ':'); | |
4761 | if (p1 != NULL) | |
4762 | len = p1 - p; | |
4763 | else | |
4764 | len = strlen (p); | |
4765 | strncpy (tryname, p, len); | |
4766 | tryname[len] = '\0'; | |
4767 | strcat (tryname, "/"); | |
4768 | strcat (tryname, shell_file); | |
4769 | if (access (tryname, X_OK) < 0) | |
4770 | continue; | |
4771 | if (stat (tryname, &statbuf) < 0) | |
4772 | continue; | |
4773 | if (!S_ISREG (statbuf.st_mode)) | |
4774 | /* We certainly need to reject directories. I'm not quite | |
4775 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4776 | that people want to exec() these things. */ | |
4777 | continue; | |
4778 | break; | |
4779 | } | |
4780 | if (p == NULL) | |
4781 | /* Not found. This must be an error rather than merely passing | |
4782 | the file to execlp(), because execlp() would try all the | |
4783 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
4784 | error ("procfs:%d -- Can't find shell %s in PATH", |
4785 | __LINE__, shell_file); | |
c906108c SS |
4786 | |
4787 | shell_file = tryname; | |
4788 | } | |
4789 | ||
c3f6f71d JM |
4790 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4791 | procfs_init_inferior, NULL, shell_file); | |
c906108c SS |
4792 | |
4793 | /* We are at the first instruction we care about. */ | |
4794 | /* Pedal to the metal... */ | |
4795 | ||
2acceee2 | 4796 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
4797 | } |
4798 | ||
c3f6f71d JM |
4799 | /* |
4800 | * Function: notice_thread | |
4801 | * | |
4802 | * Callback for find_new_threads. | |
4803 | * Calls "add_thread". | |
4804 | */ | |
c906108c | 4805 | |
c3f6f71d JM |
4806 | static int |
4807 | procfs_notice_thread (pi, thread, ptr) | |
4808 | procinfo *pi; | |
4809 | procinfo *thread; | |
4810 | void *ptr; | |
c906108c | 4811 | { |
c3f6f71d | 4812 | int gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4813 | |
c3f6f71d JM |
4814 | if (!in_thread_list (gdb_threadid)) |
4815 | add_thread (gdb_threadid); | |
c906108c | 4816 | |
c3f6f71d JM |
4817 | return 0; |
4818 | } | |
4819 | ||
4820 | /* | |
4821 | * Function: target_find_new_threads | |
4822 | * | |
4823 | * Query all the threads that the target knows about, | |
4824 | * and give them back to GDB to add to its list. | |
4825 | */ | |
4826 | ||
4827 | void | |
4828 | procfs_find_new_threads () | |
4829 | { | |
4830 | procinfo *pi; | |
4831 | ||
4832 | /* Find procinfo for main process */ | |
4833 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
4834 | proc_update_threads (pi); | |
4835 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4836 | } |
4837 | ||
c3f6f71d JM |
4838 | /* |
4839 | * Function: target_thread_alive | |
4840 | * | |
4841 | * Return true if the thread is still 'alive'. | |
4842 | * | |
4843 | * This guy doesn't really seem to be doing his job. | |
4844 | * Got to investigate how to tell when a thread is really gone. | |
4845 | */ | |
c906108c | 4846 | |
c906108c | 4847 | static int |
c3f6f71d JM |
4848 | procfs_thread_alive (pid) |
4849 | int pid; | |
c906108c | 4850 | { |
c3f6f71d JM |
4851 | int proc, thread; |
4852 | procinfo *pi; | |
c906108c | 4853 | |
c3f6f71d JM |
4854 | proc = PIDGET (pid); |
4855 | thread = TIDGET (pid); | |
4856 | /* If I don't know it, it ain't alive! */ | |
4857 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
4858 | return 0; | |
4859 | ||
4860 | /* If I can't get its status, it ain't alive! | |
4861 | What's more, I need to forget about it! */ | |
4862 | if (!proc_get_status (pi)) | |
4863 | { | |
4864 | destroy_procinfo (pi); | |
4865 | return 0; | |
4866 | } | |
4867 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
4868 | return 1; | |
c906108c | 4869 | } |
c3f6f71d JM |
4870 | |
4871 | /* | |
4872 | * Function: target_pid_to_str | |
4873 | * | |
4874 | * Return a string to be used to identify the thread in | |
4875 | * the "info threads" display. | |
4876 | */ | |
4877 | ||
4878 | char * | |
4879 | procfs_pid_to_str (pid) | |
c5aa993b | 4880 | int pid; |
c3f6f71d JM |
4881 | { |
4882 | static char buf[80]; | |
4883 | int proc, thread; | |
4884 | procinfo *pi; | |
4885 | ||
4886 | proc = PIDGET (pid); | |
4887 | thread = TIDGET (pid); | |
4888 | pi = find_procinfo (proc, thread); | |
4889 | ||
4890 | if (thread == 0) | |
4891 | sprintf (buf, "Process %d", proc); | |
4892 | else | |
4893 | sprintf (buf, "LWP %d", thread); | |
4894 | return &buf[0]; | |
4895 | } | |
4896 | ||
4897 | /* | |
4898 | * Function: procfs_set_watchpoint | |
4899 | * Insert a watchpoint | |
4900 | */ | |
4901 | ||
4902 | int | |
4903 | procfs_set_watchpoint (pid, addr, len, rwflag, after) | |
4904 | int pid; | |
c5aa993b | 4905 | CORE_ADDR addr; |
c3f6f71d JM |
4906 | int len; |
4907 | int rwflag; | |
4908 | int after; | |
c906108c | 4909 | { |
c3f6f71d JM |
4910 | #ifndef UNIXWARE |
4911 | int pflags = 0; | |
4912 | procinfo *pi; | |
4913 | ||
4914 | pi = find_procinfo_or_die (pid == -1 ? | |
4915 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4916 | ||
4917 | /* Translate from GDB's flags to /proc's */ | |
4918 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 4919 | { |
c3f6f71d JM |
4920 | switch (rwflag) { /* FIXME: need an enum! */ |
4921 | case hw_write: /* default watchpoint (write) */ | |
4922 | pflags = WRITE_WATCHFLAG; | |
4923 | break; | |
4924 | case hw_read: /* read watchpoint */ | |
4925 | pflags = READ_WATCHFLAG; | |
4926 | break; | |
4927 | case hw_access: /* access watchpoint */ | |
4928 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4929 | break; | |
4930 | case hw_execute: /* execution HW breakpoint */ | |
4931 | pflags = EXEC_WATCHFLAG; | |
4932 | break; | |
4933 | default: /* Something weird. Return error. */ | |
c906108c | 4934 | return -1; |
c3f6f71d JM |
4935 | } |
4936 | if (after) /* Stop after r/w access is completed. */ | |
4937 | pflags |= AFTER_WATCHFLAG; | |
4938 | } | |
4939 | ||
4940 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4941 | { | |
4942 | if (errno == E2BIG) /* Typical error for no resources */ | |
4943 | return -1; /* fail */ | |
4944 | /* GDB may try to remove the same watchpoint twice. | |
4945 | If a remove request returns no match, don't error. */ | |
c906108c | 4946 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4947 | return 0; /* ignore */ |
4948 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4949 | } |
c3f6f71d | 4950 | #endif |
c906108c SS |
4951 | return 0; |
4952 | } | |
4953 | ||
c3f6f71d JM |
4954 | /* |
4955 | * Function: stopped_by_watchpoint | |
4956 | * | |
4957 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
4958 | * else returns zero. | |
4959 | */ | |
4960 | ||
c906108c | 4961 | int |
c5aa993b | 4962 | procfs_stopped_by_watchpoint (pid) |
c3f6f71d | 4963 | int pid; |
c906108c | 4964 | { |
c3f6f71d | 4965 | procinfo *pi; |
c906108c | 4966 | |
c3f6f71d JM |
4967 | pi = find_procinfo_or_die (pid == -1 ? |
4968 | PIDGET (inferior_pid) : PIDGET (pid), 0); | |
4969 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 4970 | { |
c3f6f71d JM |
4971 | if (proc_why (pi) == PR_FAULTED) |
4972 | { | |
c906108c | 4973 | #ifdef FLTWATCH |
c3f6f71d JM |
4974 | if (proc_what (pi) == FLTWATCH) |
4975 | return 1; | |
c906108c SS |
4976 | #endif |
4977 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4978 | if (proc_what (pi) == FLTKWATCH) |
4979 | return 1; | |
c906108c | 4980 | #endif |
c3f6f71d | 4981 | } |
c906108c SS |
4982 | } |
4983 | return 0; | |
4984 | } | |
c906108c | 4985 | |
c3f6f71d JM |
4986 | #ifdef TM_I386SOL2_H |
4987 | /* | |
4988 | * Function: procfs_find_LDT_entry | |
4989 | * | |
4990 | * Input: | |
4991 | * int pid; // The GDB-style pid-plus-LWP. | |
4992 | * | |
4993 | * Return: | |
4994 | * pointer to the corresponding LDT entry. | |
4995 | */ | |
c906108c | 4996 | |
c3f6f71d JM |
4997 | struct ssd * |
4998 | procfs_find_LDT_entry (pid) | |
c906108c SS |
4999 | int pid; |
5000 | { | |
c3f6f71d JM |
5001 | gdb_gregset_t *gregs; |
5002 | int key; | |
5003 | procinfo *pi; | |
c906108c | 5004 | |
c3f6f71d JM |
5005 | /* Find procinfo for the lwp. */ |
5006 | if ((pi = find_procinfo (PIDGET (pid), TIDGET (pid))) == NULL) | |
c906108c | 5007 | { |
c3f6f71d JM |
5008 | warning ("procfs_find_LDT_entry: could not find procinfi for %d.", |
5009 | pid); | |
5010 | return NULL; | |
c906108c | 5011 | } |
c3f6f71d JM |
5012 | /* get its general registers. */ |
5013 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
5014 | { | |
5015 | warning ("procfs_find_LDT_entry: could not read gregs for %d.", | |
5016 | pid); | |
5017 | return NULL; | |
5018 | } | |
5019 | /* Now extract the GS register's lower 16 bits. */ | |
5020 | key = (*gregs)[GS] & 0xffff; | |
5021 | ||
5022 | /* Find the matching entry and return it. */ | |
5023 | return proc_get_LDT_entry (pi, key); | |
c906108c | 5024 | } |
c3f6f71d | 5025 | #endif /* TM_I386SOL2_H */ |
c906108c | 5026 | |
c3f6f71d JM |
5027 | |
5028 | ||
5029 | static void | |
5030 | info_proc_cmd (args, from_tty) | |
5031 | char *args; | |
5032 | int from_tty; | |
c906108c | 5033 | { |
c3f6f71d JM |
5034 | struct cleanup *old_chain; |
5035 | procinfo *process = NULL; | |
5036 | procinfo *thread = NULL; | |
5037 | char **argv = NULL; | |
5038 | char *tmp = NULL; | |
5039 | int pid = 0; | |
5040 | int tid = 0; | |
c906108c | 5041 | |
c3f6f71d JM |
5042 | old_chain = make_cleanup (null_cleanup, 0); |
5043 | if (args) | |
0fda6bd2 JM |
5044 | { |
5045 | if ((argv = buildargv (args)) == NULL) | |
5046 | nomem (0); | |
5047 | else | |
5048 | make_cleanup ((make_cleanup_func) freeargv, argv); | |
5049 | } | |
c3f6f71d JM |
5050 | while (argv != NULL && *argv != NULL) |
5051 | { | |
5052 | if (isdigit (argv[0][0])) | |
5053 | { | |
5054 | pid = strtoul (argv[0], &tmp, 10); | |
5055 | if (*tmp == '/') | |
5056 | tid = strtoul (++tmp, NULL, 10); | |
5057 | } | |
5058 | else if (argv[0][0] == '/') | |
5059 | { | |
5060 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5061 | } | |
5062 | else | |
5063 | { | |
5064 | /* [...] */ | |
5065 | } | |
5066 | argv++; | |
5067 | } | |
5068 | if (pid == 0) | |
5069 | pid = PIDGET (inferior_pid); | |
5070 | if (pid == 0) | |
5071 | error ("No current process: you must name one."); | |
5072 | else | |
c906108c | 5073 | { |
c3f6f71d JM |
5074 | /* Have pid, will travel. |
5075 | First see if it's a process we're already debugging. */ | |
5076 | process = find_procinfo (pid, 0); | |
5077 | if (process == NULL) | |
5078 | { | |
5079 | /* No. So open a procinfo for it, but | |
5080 | remember to close it again when finished. */ | |
5081 | process = create_procinfo (pid, 0); | |
5082 | make_cleanup ((make_cleanup_func) destroy_procinfo, process); | |
5083 | if (!open_procinfo_files (process, FD_CTL)) | |
5084 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5085 | } | |
c906108c | 5086 | } |
c3f6f71d JM |
5087 | if (tid != 0) |
5088 | thread = create_procinfo (pid, tid); | |
5089 | ||
5090 | if (process) | |
5091 | { | |
5092 | printf_filtered ("process %d flags:\n", process->pid); | |
5093 | proc_prettyprint_flags (proc_flags (process), 1); | |
5094 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5095 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5096 | if (proc_get_nthreads (process) > 1) | |
5097 | printf_filtered ("Process has %d threads.\n", | |
5098 | proc_get_nthreads (process)); | |
5099 | } | |
5100 | if (thread) | |
5101 | { | |
5102 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5103 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5104 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5105 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5106 | } | |
5107 | ||
5108 | do_cleanups (old_chain); | |
c906108c SS |
5109 | } |
5110 | ||
c3f6f71d JM |
5111 | static void |
5112 | proc_trace_syscalls (args, from_tty, entry_or_exit, mode) | |
5113 | char *args; | |
5114 | int from_tty; | |
5115 | int entry_or_exit; | |
5116 | int mode; | |
c906108c | 5117 | { |
c3f6f71d JM |
5118 | procinfo *pi; |
5119 | sysset_t *sysset; | |
5120 | int syscallnum = 0; | |
c906108c | 5121 | |
c3f6f71d JM |
5122 | if (inferior_pid <= 0) |
5123 | error ("you must be debugging a process to use this command."); | |
c906108c | 5124 | |
c3f6f71d JM |
5125 | if (args == NULL || args[0] == 0) |
5126 | error_no_arg ("system call to trace"); | |
5127 | ||
5128 | pi = find_procinfo_or_die (PIDGET (inferior_pid), 0); | |
5129 | if (isdigit (args[0])) | |
5130 | { | |
5131 | syscallnum = atoi (args); | |
5132 | if (entry_or_exit == PR_SYSENTRY) | |
5133 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5134 | else | |
5135 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5136 | |
c3f6f71d JM |
5137 | if (sysset == NULL) |
5138 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5139 | |
c3f6f71d JM |
5140 | if (mode == FLAG_SET) |
5141 | praddset (sysset, syscallnum); | |
5142 | else | |
5143 | prdelset (sysset, syscallnum); | |
c906108c | 5144 | |
c3f6f71d JM |
5145 | if (entry_or_exit == PR_SYSENTRY) |
5146 | { | |
5147 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5148 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5149 | } | |
5150 | else | |
5151 | { | |
5152 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5153 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5154 | } | |
5155 | } | |
5156 | } | |
5157 | ||
5158 | static void | |
5159 | proc_trace_sysentry_cmd (args, from_tty) | |
5160 | char *args; | |
5161 | int from_tty; | |
c906108c | 5162 | { |
c3f6f71d JM |
5163 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5164 | } | |
c906108c | 5165 | |
c3f6f71d JM |
5166 | static void |
5167 | proc_trace_sysexit_cmd (args, from_tty) | |
5168 | char *args; | |
5169 | int from_tty; | |
5170 | { | |
5171 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5172 | } |
c906108c | 5173 | |
c3f6f71d JM |
5174 | static void |
5175 | proc_untrace_sysentry_cmd (args, from_tty) | |
5176 | char *args; | |
5177 | int from_tty; | |
5178 | { | |
5179 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5180 | } | |
5181 | ||
5182 | static void | |
5183 | proc_untrace_sysexit_cmd (args, from_tty) | |
5184 | char *args; | |
5185 | int from_tty; | |
c906108c | 5186 | { |
c3f6f71d JM |
5187 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5188 | } | |
c906108c | 5189 | |
c906108c | 5190 | |
c3f6f71d JM |
5191 | int |
5192 | mapping_test (fd, core_addr) | |
5193 | int fd; | |
5194 | CORE_ADDR core_addr; | |
5195 | { | |
5196 | printf ("File descriptor %d, base address 0x%08x\n", fd, core_addr); | |
5197 | if (fd > 0) | |
5198 | close (fd); | |
5199 | return 0; | |
c906108c | 5200 | } |
c5aa993b | 5201 | |
c3f6f71d JM |
5202 | void |
5203 | test_mapping_cmd (args, from_tty) | |
5204 | char *args; | |
5205 | int from_tty; | |
c906108c | 5206 | { |
c3f6f71d JM |
5207 | int ret; |
5208 | ret = proc_iterate_over_mappings (mapping_test); | |
5209 | printf ("iterate_over_mappings returned %d.\n", ret); | |
c906108c SS |
5210 | } |
5211 | ||
5212 | void | |
5213 | _initialize_procfs () | |
5214 | { | |
c906108c SS |
5215 | init_procfs_ops (); |
5216 | add_target (&procfs_ops); | |
c3f6f71d JM |
5217 | add_info ("proc", info_proc_cmd, |
5218 | "Show /proc process information about any running process.\ | |
5219 | Default is the process being debugged."); | |
5220 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, | |
5221 | "Give a trace of entries into the syscall."); | |
5222 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, | |
5223 | "Give a trace of exits from the syscall."); | |
5224 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, | |
5225 | "Cancel a trace of entries into the syscall."); | |
5226 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, | |
5227 | "Cancel a trace of exits from the syscall."); | |
5228 | ||
5229 | add_com ("test-mapping", no_class, test_mapping_cmd, | |
5230 | "test iterate-over-mappings"); | |
5231 | } | |
5232 | ||
5233 | /* =================== END, GDB "MODULE" =================== */ | |
5234 | ||
5235 | ||
5236 | ||
5237 | /* miscelaneous stubs: */ | |
5238 | /* The following satisfy a few random symbols mostly created by */ | |
5239 | /* the solaris threads implementation, which I will chase down */ | |
5240 | /* later. */ | |
5241 | ||
5242 | /* | |
5243 | * Return a pid for which we guarantee | |
5244 | * we will be able to find a 'live' procinfo. | |
5245 | */ | |
5246 | ||
5247 | int | |
5248 | procfs_first_available () | |
5249 | { | |
5250 | if (procinfo_list) | |
5251 | return procinfo_list->pid; | |
5252 | else | |
5253 | return -1; | |
5254 | } | |
c906108c | 5255 | |
c3f6f71d JM |
5256 | int |
5257 | procfs_get_pid_fd (pid) | |
5258 | int pid; | |
5259 | { | |
5260 | procinfo *pi; | |
c906108c | 5261 | |
c3f6f71d JM |
5262 | if (pid == -1 && inferior_pid != 0) |
5263 | pi = find_procinfo (PIDGET (inferior_pid), 0); | |
5264 | else | |
5265 | pi = find_procinfo (PIDGET (pid), 0); | |
5266 | ||
5267 | if (pi) | |
5268 | return pi->ctl_fd; | |
5269 | else | |
5270 | return -1; | |
c906108c | 5271 | } |