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