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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a AC |
2 | |
3 | Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, | |
4 | Inc. | |
5 | ||
c3f6f71d JM |
6 | Written by Michael Snyder at Cygnus Solutions. |
7 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 8 | |
c3f6f71d | 9 | This file is part of GDB. |
c906108c | 10 | |
c3f6f71d JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
c906108c | 15 | |
c3f6f71d JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c3f6f71d | 21 | You should have received a copy of the GNU General Public License |
19958708 | 22 | along with this program; if not, write to the Free Software Foundation, |
c3f6f71d | 23 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
c906108c | 24 | |
c3f6f71d JM |
25 | #include "defs.h" |
26 | #include "inferior.h" | |
27 | #include "target.h" | |
28 | #include "gdbcore.h" | |
65554fef | 29 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 30 | #include "gdbcmd.h" |
0fda6bd2 | 31 | #include "gdbthread.h" |
c906108c | 32 | |
c3f6f71d JM |
33 | #if defined (NEW_PROC_API) |
34 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
35 | #endif | |
c906108c | 36 | |
c3f6f71d | 37 | #include <sys/procfs.h> |
37de36c6 | 38 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 39 | #include <sys/fault.h> |
37de36c6 KB |
40 | #endif |
41 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 42 | #include <sys/syscall.h> |
37de36c6 | 43 | #endif |
c3f6f71d | 44 | #include <sys/errno.h> |
2555fe1a | 45 | #include "gdb_wait.h" |
0fda6bd2 JM |
46 | #include <signal.h> |
47 | #include <ctype.h> | |
19958708 | 48 | #include "gdb_string.h" |
df8f7274 | 49 | #include "gdb_assert.h" |
44270758 | 50 | #include "inflow.h" |
0fda6bd2 | 51 | |
19958708 | 52 | /* |
c3f6f71d JM |
53 | * PROCFS.C |
54 | * | |
55 | * This module provides the interface between GDB and the | |
56 | * /proc file system, which is used on many versions of Unix | |
57 | * as a means for debuggers to control other processes. | |
58 | * Examples of the systems that use this interface are: | |
59 | * Irix | |
60 | * Solaris | |
61 | * OSF | |
62 | * Unixware | |
37de36c6 | 63 | * AIX5 |
c3f6f71d | 64 | * |
65554fef | 65 | * /proc works by imitating a file system: you open a simulated file |
c3f6f71d JM |
66 | * that represents the process you wish to interact with, and |
67 | * perform operations on that "file" in order to examine or change | |
68 | * the state of the other process. | |
69 | * | |
70 | * The most important thing to know about /proc and this module | |
71 | * is that there are two very different interfaces to /proc: | |
72 | * One that uses the ioctl system call, and | |
73 | * another that uses read and write system calls. | |
74 | * This module has to support both /proc interfaces. This means | |
75 | * that there are two different ways of doing every basic operation. | |
76 | * | |
19958708 | 77 | * In order to keep most of the code simple and clean, I have |
c3f6f71d JM |
78 | * defined an interface "layer" which hides all these system calls. |
79 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
80 | * and most or all occurrances of this ifdef should be confined to | |
81 | * this interface layer. | |
c906108c SS |
82 | */ |
83 | ||
84 | ||
c3f6f71d | 85 | /* Determine which /proc API we are using: |
19958708 | 86 | The ioctl API defines PIOCSTATUS, while |
c3f6f71d | 87 | the read/write (multiple fd) API never does. */ |
c906108c | 88 | |
c3f6f71d | 89 | #ifdef NEW_PROC_API |
c906108c | 90 | #include <sys/types.h> |
4b14d3e4 | 91 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 92 | #endif |
c906108c | 93 | |
c3f6f71d JM |
94 | #include <fcntl.h> /* for O_RDONLY */ |
95 | #include <unistd.h> /* for "X_OK" */ | |
96 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 97 | |
103b3ef5 MS |
98 | /* Note: procfs-utils.h must be included after the above system header |
99 | files, because it redefines various system calls using macros. | |
100 | This may be incompatible with the prototype declarations. */ | |
101 | ||
103b3ef5 MS |
102 | #include "proc-utils.h" |
103 | ||
c60c0f5f MS |
104 | /* Prototypes for supply_gregset etc. */ |
105 | #include "gregset.h" | |
106 | ||
c3f6f71d | 107 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 108 | |
c3f6f71d JM |
109 | /* |
110 | * This module defines the GDB target vector and its methods. | |
111 | */ | |
c906108c | 112 | |
8ab86381 | 113 | static void procfs_open (char *, int); |
a14ed312 KB |
114 | static void procfs_attach (char *, int); |
115 | static void procfs_detach (char *, int); | |
39f77062 | 116 | static void procfs_resume (ptid_t, int, enum target_signal); |
a14ed312 KB |
117 | static int procfs_can_run (void); |
118 | static void procfs_stop (void); | |
119 | static void procfs_files_info (struct target_ops *); | |
120 | static void procfs_fetch_registers (int); | |
121 | static void procfs_store_registers (int); | |
39f77062 | 122 | static void procfs_notice_signals (ptid_t); |
a14ed312 KB |
123 | static void procfs_prepare_to_store (void); |
124 | static void procfs_kill_inferior (void); | |
125 | static void procfs_mourn_inferior (void); | |
126 | static void procfs_create_inferior (char *, char *, char **); | |
39f77062 | 127 | static ptid_t procfs_wait (ptid_t, struct target_waitstatus *); |
043780a1 AC |
128 | static int procfs_xfer_memory (CORE_ADDR, char *, int, int, |
129 | struct mem_attrib *attrib, | |
130 | struct target_ops *); | |
a14ed312 | 131 | |
39f77062 | 132 | static int procfs_thread_alive (ptid_t); |
a14ed312 KB |
133 | |
134 | void procfs_find_new_threads (void); | |
39f77062 | 135 | char *procfs_pid_to_str (ptid_t); |
c3f6f71d | 136 | |
19958708 RM |
137 | static int proc_find_memory_regions (int (*) (CORE_ADDR, |
138 | unsigned long, | |
139 | int, int, int, | |
140 | void *), | |
be4d1333 MS |
141 | void *); |
142 | ||
143 | static char * procfs_make_note_section (bfd *, int *); | |
144 | ||
1e03ad20 KB |
145 | static int procfs_can_use_hw_breakpoint (int, int, int); |
146 | ||
c3f6f71d | 147 | struct target_ops procfs_ops; /* the target vector */ |
c906108c | 148 | |
c3f6f71d | 149 | static void |
fba45db2 | 150 | init_procfs_ops (void) |
c3f6f71d | 151 | { |
be4d1333 MS |
152 | procfs_ops.to_shortname = "procfs"; |
153 | procfs_ops.to_longname = "Unix /proc child process"; | |
19958708 | 154 | procfs_ops.to_doc = |
c3f6f71d | 155 | "Unix /proc child process (started by the \"run\" command)."; |
be4d1333 MS |
156 | procfs_ops.to_open = procfs_open; |
157 | procfs_ops.to_can_run = procfs_can_run; | |
158 | procfs_ops.to_create_inferior = procfs_create_inferior; | |
159 | procfs_ops.to_kill = procfs_kill_inferior; | |
160 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; | |
161 | procfs_ops.to_attach = procfs_attach; | |
162 | procfs_ops.to_detach = procfs_detach; | |
163 | procfs_ops.to_wait = procfs_wait; | |
164 | procfs_ops.to_resume = procfs_resume; | |
165 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; | |
166 | procfs_ops.to_fetch_registers = procfs_fetch_registers; | |
167 | procfs_ops.to_store_registers = procfs_store_registers; | |
168 | procfs_ops.to_xfer_memory = procfs_xfer_memory; | |
169 | procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
170 | procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
171 | procfs_ops.to_notice_signals = procfs_notice_signals; | |
172 | procfs_ops.to_files_info = procfs_files_info; | |
173 | procfs_ops.to_stop = procfs_stop; | |
174 | ||
175 | procfs_ops.to_terminal_init = terminal_init_inferior; | |
176 | procfs_ops.to_terminal_inferior = terminal_inferior; | |
c3f6f71d | 177 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
be4d1333 | 178 | procfs_ops.to_terminal_ours = terminal_ours; |
a790ad35 | 179 | procfs_ops.to_terminal_save_ours = terminal_save_ours; |
be4d1333 MS |
180 | procfs_ops.to_terminal_info = child_terminal_info; |
181 | ||
182 | procfs_ops.to_find_new_threads = procfs_find_new_threads; | |
183 | procfs_ops.to_thread_alive = procfs_thread_alive; | |
184 | procfs_ops.to_pid_to_str = procfs_pid_to_str; | |
185 | ||
186 | procfs_ops.to_has_all_memory = 1; | |
187 | procfs_ops.to_has_memory = 1; | |
188 | procfs_ops.to_has_execution = 1; | |
189 | procfs_ops.to_has_stack = 1; | |
190 | procfs_ops.to_has_registers = 1; | |
191 | procfs_ops.to_stratum = process_stratum; | |
192 | procfs_ops.to_has_thread_control = tc_schedlock; | |
193 | procfs_ops.to_find_memory_regions = proc_find_memory_regions; | |
194 | procfs_ops.to_make_corefile_notes = procfs_make_note_section; | |
1e03ad20 | 195 | procfs_ops.to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
be4d1333 | 196 | procfs_ops.to_magic = OPS_MAGIC; |
c3f6f71d | 197 | } |
c906108c | 198 | |
c3f6f71d JM |
199 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
200 | ||
c3f6f71d JM |
201 | /* |
202 | * World Unification: | |
203 | * | |
204 | * Put any typedefs, defines etc. here that are required for | |
205 | * the unification of code that handles different versions of /proc. | |
206 | */ | |
207 | ||
208 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 209 | #ifdef WA_READ |
19958708 | 210 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
211 | WRITE_WATCHFLAG = WA_WRITE, |
212 | EXEC_WATCHFLAG = WA_EXEC, | |
213 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
214 | }; | |
215 | #endif | |
216 | #else /* Irix method for watchpoints */ | |
19958708 | 217 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
218 | WRITE_WATCHFLAG = MA_WRITE, |
219 | EXEC_WATCHFLAG = MA_EXEC, | |
220 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
221 | }; | |
222 | #endif | |
223 | ||
37de36c6 KB |
224 | /* gdb_sigset_t */ |
225 | #ifdef HAVE_PR_SIGSET_T | |
226 | typedef pr_sigset_t gdb_sigset_t; | |
227 | #else | |
228 | typedef sigset_t gdb_sigset_t; | |
229 | #endif | |
230 | ||
231 | /* sigaction */ | |
232 | #ifdef HAVE_PR_SIGACTION64_T | |
233 | typedef pr_sigaction64_t gdb_sigaction_t; | |
234 | #else | |
235 | typedef struct sigaction gdb_sigaction_t; | |
236 | #endif | |
237 | ||
238 | /* siginfo */ | |
239 | #ifdef HAVE_PR_SIGINFO64_T | |
240 | typedef pr_siginfo64_t gdb_siginfo_t; | |
241 | #else | |
242 | typedef struct siginfo gdb_siginfo_t; | |
243 | #endif | |
244 | ||
245 | /* gdb_premptysysset */ | |
246 | #ifdef premptysysset | |
247 | #define gdb_premptysysset premptysysset | |
248 | #else | |
249 | #define gdb_premptysysset premptyset | |
250 | #endif | |
251 | ||
252 | /* praddsysset */ | |
253 | #ifdef praddsysset | |
254 | #define gdb_praddsysset praddsysset | |
255 | #else | |
256 | #define gdb_praddsysset praddset | |
257 | #endif | |
258 | ||
259 | /* prdelsysset */ | |
260 | #ifdef prdelsysset | |
261 | #define gdb_prdelsysset prdelsysset | |
262 | #else | |
263 | #define gdb_prdelsysset prdelset | |
264 | #endif | |
265 | ||
266 | /* prissyssetmember */ | |
267 | #ifdef prissyssetmember | |
268 | #define gdb_pr_issyssetmember prissyssetmember | |
269 | #else | |
270 | #define gdb_pr_issyssetmember prismember | |
271 | #endif | |
272 | ||
273 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
274 | as intuitively descriptive as it could be, so we'll define | |
275 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
276 | this writing, this feature is only found on AIX5 systems and | |
277 | basically means that the set of syscalls is not fixed. I.e, | |
278 | there's no nice table that one can #include to get all of the | |
279 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
280 | for each process. We are at least guaranteed that they won't | |
281 | change over the lifetime of the process. But each process could | |
282 | (in theory) have different syscall numbers. | |
283 | */ | |
284 | #ifdef HAVE_PRSYSENT_T | |
285 | #define DYNAMIC_SYSCALLS | |
286 | #endif | |
c3f6f71d JM |
287 | |
288 | ||
289 | ||
290 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
291 | ||
292 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
293 | ||
294 | /* The procinfo struct is a wrapper to hold all the state information | |
295 | concerning a /proc process. There should be exactly one procinfo | |
296 | for each process, and since GDB currently can debug only one | |
297 | process at a time, that means there should be only one procinfo. | |
298 | All of the LWP's of a process can be accessed indirectly thru the | |
299 | single process procinfo. | |
300 | ||
301 | However, against the day when GDB may debug more than one process, | |
302 | this data structure is kept in a list (which for now will hold no | |
303 | more than one member), and many functions will have a pointer to a | |
304 | procinfo as an argument. | |
305 | ||
306 | There will be a separate procinfo structure for use by the (not yet | |
307 | implemented) "info proc" command, so that we can print useful | |
308 | information about any random process without interfering with the | |
309 | inferior's procinfo information. */ | |
310 | ||
311 | #ifdef NEW_PROC_API | |
312 | /* format strings for /proc paths */ | |
313 | # ifndef CTL_PROC_NAME_FMT | |
314 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
315 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
316 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
317 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
318 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
319 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
320 | # endif | |
321 | /* the name of the proc status struct depends on the implementation */ | |
322 | typedef pstatus_t gdb_prstatus_t; | |
323 | typedef lwpstatus_t gdb_lwpstatus_t; | |
324 | #else /* ! NEW_PROC_API */ | |
325 | /* format strings for /proc paths */ | |
326 | # ifndef CTL_PROC_NAME_FMT | |
327 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
328 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
329 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
330 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
331 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
332 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
333 | # endif | |
c906108c | 334 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 335 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
336 | typedef prstatus_t gdb_lwpstatus_t; |
337 | #endif /* NEW_PROC_API */ | |
c906108c | 338 | |
c3f6f71d JM |
339 | typedef struct procinfo { |
340 | struct procinfo *next; | |
341 | int pid; /* Process ID */ | |
342 | int tid; /* Thread/LWP id */ | |
c906108c | 343 | |
c3f6f71d JM |
344 | /* process state */ |
345 | int was_stopped; | |
346 | int ignore_next_sigstop; | |
c906108c | 347 | |
19958708 | 348 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
349 | several different fd's, depending on the version of /proc |
350 | (old ioctl or new read/write). */ | |
c906108c | 351 | |
c3f6f71d JM |
352 | int ctl_fd; /* File descriptor for /proc control file */ |
353 | /* | |
354 | * The next three file descriptors are actually only needed in the | |
355 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
19958708 | 356 | * However, to avoid a bunch of #ifdefs in the code, we will use |
c3f6f71d JM |
357 | * them uniformly by (in the case of the ioctl single-file-descriptor |
358 | * implementation) filling them with copies of the control fd. | |
359 | */ | |
360 | int status_fd; /* File descriptor for /proc status file */ | |
361 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 362 | |
c3f6f71d | 363 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 364 | |
c3f6f71d | 365 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
366 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
367 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
368 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
369 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 370 | |
c3f6f71d | 371 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 372 | |
c3f6f71d JM |
373 | #ifndef NEW_PROC_API |
374 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 375 | #endif |
37de36c6 KB |
376 | |
377 | #ifdef DYNAMIC_SYSCALLS | |
378 | int num_syscalls; /* Total number of syscalls */ | |
379 | char **syscall_names; /* Syscall number to name map */ | |
380 | #endif | |
19958708 | 381 | |
c3f6f71d | 382 | struct procinfo *thread_list; |
c906108c | 383 | |
c3f6f71d JM |
384 | int status_valid : 1; |
385 | int gregs_valid : 1; | |
386 | int fpregs_valid : 1; | |
387 | int threads_valid: 1; | |
388 | } procinfo; | |
c906108c | 389 | |
c3f6f71d | 390 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 391 | |
c3f6f71d | 392 | /* Function prototypes for procinfo module: */ |
c906108c | 393 | |
a14ed312 KB |
394 | static procinfo *find_procinfo_or_die (int pid, int tid); |
395 | static procinfo *find_procinfo (int pid, int tid); | |
396 | static procinfo *create_procinfo (int pid, int tid); | |
397 | static void destroy_procinfo (procinfo * p); | |
004527cb | 398 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
399 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
400 | static int open_procinfo_files (procinfo * p, int which); | |
401 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
402 | static int sysset_t_size (procinfo *p); |
403 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
404 | #ifdef DYNAMIC_SYSCALLS | |
405 | static void load_syscalls (procinfo *pi); | |
406 | static void free_syscalls (procinfo *pi); | |
407 | static int find_syscall (procinfo *pi, char *name); | |
408 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 409 | |
c3f6f71d JM |
410 | /* The head of the procinfo list: */ |
411 | static procinfo * procinfo_list; | |
c906108c | 412 | |
c3f6f71d JM |
413 | /* |
414 | * Function: find_procinfo | |
415 | * | |
416 | * Search the procinfo list. | |
417 | * | |
418 | * Returns: pointer to procinfo, or NULL if not found. | |
419 | */ | |
c906108c | 420 | |
19958708 | 421 | static procinfo * |
fba45db2 | 422 | find_procinfo (int pid, int tid) |
c5aa993b | 423 | { |
c3f6f71d | 424 | procinfo *pi; |
c906108c | 425 | |
c3f6f71d JM |
426 | for (pi = procinfo_list; pi; pi = pi->next) |
427 | if (pi->pid == pid) | |
428 | break; | |
c906108c | 429 | |
c3f6f71d JM |
430 | if (pi) |
431 | if (tid) | |
432 | { | |
433 | /* Don't check threads_valid. If we're updating the | |
434 | thread_list, we want to find whatever threads are already | |
435 | here. This means that in general it is the caller's | |
436 | responsibility to check threads_valid and update before | |
437 | calling find_procinfo, if the caller wants to find a new | |
438 | thread. */ | |
439 | ||
440 | for (pi = pi->thread_list; pi; pi = pi->next) | |
441 | if (pi->tid == tid) | |
442 | break; | |
443 | } | |
c906108c | 444 | |
c3f6f71d JM |
445 | return pi; |
446 | } | |
c906108c | 447 | |
c3f6f71d JM |
448 | /* |
449 | * Function: find_procinfo_or_die | |
450 | * | |
451 | * Calls find_procinfo, but errors on failure. | |
452 | */ | |
c906108c | 453 | |
c3f6f71d | 454 | static procinfo * |
fba45db2 | 455 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
456 | { |
457 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 458 | |
c3f6f71d | 459 | if (pi == NULL) |
0fda6bd2 JM |
460 | { |
461 | if (tid) | |
19958708 | 462 | error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.", |
0fda6bd2 JM |
463 | pid, tid); |
464 | else | |
465 | error ("procfs: couldn't find pid %d in procinfo list.", pid); | |
466 | } | |
c3f6f71d JM |
467 | return pi; |
468 | } | |
c906108c | 469 | |
4d1bcd09 KB |
470 | /* open_with_retry() is a wrapper for open(). The appropriate |
471 | open() call is attempted; if unsuccessful, it will be retried as | |
472 | many times as needed for the EAGAIN and EINTR conditions. | |
19958708 | 473 | |
4d1bcd09 KB |
474 | For other conditions, open_with_retry() will retry the open() a |
475 | limited number of times. In addition, a short sleep is imposed | |
476 | prior to retrying the open(). The reason for this sleep is to give | |
477 | the kernel a chance to catch up and create the file in question in | |
478 | the event that GDB "wins" the race to open a file before the kernel | |
479 | has created it. */ | |
19958708 | 480 | |
4d1bcd09 KB |
481 | static int |
482 | open_with_retry (const char *pathname, int flags) | |
483 | { | |
484 | int retries_remaining, status; | |
485 | ||
486 | retries_remaining = 2; | |
487 | ||
488 | while (1) | |
489 | { | |
490 | status = open (pathname, flags); | |
491 | ||
492 | if (status >= 0 || retries_remaining == 0) | |
493 | break; | |
494 | else if (errno != EINTR && errno != EAGAIN) | |
495 | { | |
496 | retries_remaining--; | |
497 | sleep (1); | |
498 | } | |
499 | } | |
500 | ||
501 | return status; | |
502 | } | |
503 | ||
c3f6f71d JM |
504 | /* |
505 | * Function: open_procinfo_files | |
506 | * | |
507 | * Open the file descriptor for the process or LWP. | |
508 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
509 | * the others are opened lazily as needed. | |
510 | * else (if not NEW_PROC_API), there is only one real | |
511 | * file descriptor, but we keep multiple copies of it so that | |
512 | * the code that uses them does not have to be #ifdef'd. | |
513 | * | |
514 | * Return: file descriptor, or zero for failure. | |
515 | */ | |
c906108c | 516 | |
c3f6f71d | 517 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 518 | |
c3f6f71d | 519 | static int |
fba45db2 | 520 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 521 | { |
0fda6bd2 | 522 | #ifdef NEW_PROC_API |
c3f6f71d | 523 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 524 | #endif |
c3f6f71d JM |
525 | int fd; |
526 | ||
19958708 | 527 | /* |
c3f6f71d JM |
528 | * This function is getting ALMOST long enough to break up into several. |
529 | * Here is some rationale: | |
530 | * | |
531 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
19958708 | 532 | * There are several file descriptors that may need to be open |
c3f6f71d JM |
533 | * for any given process or LWP. The ones we're intereted in are: |
534 | * - control (ctl) write-only change the state | |
535 | * - status (status) read-only query the state | |
536 | * - address space (as) read/write access memory | |
537 | * - map (map) read-only virtual addr map | |
538 | * Most of these are opened lazily as they are needed. | |
19958708 | 539 | * The pathnames for the 'files' for an LWP look slightly |
c3f6f71d JM |
540 | * different from those of a first-class process: |
541 | * Pathnames for a process (<proc-id>): | |
542 | * /proc/<proc-id>/ctl | |
543 | * /proc/<proc-id>/status | |
544 | * /proc/<proc-id>/as | |
545 | * /proc/<proc-id>/map | |
546 | * Pathnames for an LWP (lwp-id): | |
547 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
548 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
549 | * An LWP has no map or address space file descriptor, since | |
550 | * the memory map and address space are shared by all LWPs. | |
551 | * | |
552 | * Everyone else (Solaris 2.5, Irix, OSF) | |
553 | * There is only one file descriptor for each process or LWP. | |
554 | * For convenience, we copy the same file descriptor into all | |
555 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
556 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
19958708 | 557 | * doesn't need any #ifdef's. |
c3f6f71d JM |
558 | * Pathname for all: |
559 | * /proc/<proc-id> | |
560 | * | |
561 | * Solaris 2.5 LWP's: | |
19958708 | 562 | * Each LWP has an independent file descriptor, but these |
c3f6f71d JM |
563 | * are not obtained via the 'open' system call like the rest: |
564 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
565 | * to the file descriptor of the parent process. | |
566 | * | |
567 | * OSF threads: | |
568 | * These do not even have their own independent file descriptor. | |
569 | * All operations are carried out on the file descriptor of the | |
570 | * parent process. Therefore we just call open again for each | |
571 | * thread, getting a new handle for the same 'file'. | |
572 | */ | |
573 | ||
574 | #ifdef NEW_PROC_API | |
575 | /* | |
576 | * In this case, there are several different file descriptors that | |
577 | * we might be asked to open. The control file descriptor will be | |
578 | * opened early, but the others will be opened lazily as they are | |
579 | * needed. | |
580 | */ | |
581 | ||
582 | strcpy (tmp, pi->pathname); | |
583 | switch (which) { /* which file descriptor to open? */ | |
584 | case FD_CTL: | |
585 | if (pi->tid) | |
586 | strcat (tmp, "/lwpctl"); | |
587 | else | |
588 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 589 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
590 | if (fd <= 0) |
591 | return 0; /* fail */ | |
592 | pi->ctl_fd = fd; | |
593 | break; | |
594 | case FD_AS: | |
595 | if (pi->tid) | |
596 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
597 | strcat (tmp, "/as"); | |
4d1bcd09 | 598 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
599 | if (fd <= 0) |
600 | return 0; /* fail */ | |
601 | pi->as_fd = fd; | |
602 | break; | |
603 | case FD_STATUS: | |
604 | if (pi->tid) | |
605 | strcat (tmp, "/lwpstatus"); | |
606 | else | |
607 | strcat (tmp, "/status"); | |
4d1bcd09 | 608 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
609 | if (fd <= 0) |
610 | return 0; /* fail */ | |
611 | pi->status_fd = fd; | |
612 | break; | |
613 | default: | |
614 | return 0; /* unknown file descriptor */ | |
615 | } | |
616 | #else /* not NEW_PROC_API */ | |
617 | /* | |
618 | * In this case, there is only one file descriptor for each procinfo | |
619 | * (ie. each process or LWP). In fact, only the file descriptor for | |
620 | * the process can actually be opened by an 'open' system call. | |
19958708 RM |
621 | * The ones for the LWPs have to be obtained thru an IOCTL call |
622 | * on the process's file descriptor. | |
c3f6f71d JM |
623 | * |
624 | * For convenience, we copy each procinfo's single file descriptor | |
19958708 | 625 | * into all of the fields occupied by the several file descriptors |
c3f6f71d JM |
626 | * of the NEW_PROC_API implementation. That way, the code that uses |
627 | * them can be written without ifdefs. | |
628 | */ | |
629 | ||
630 | ||
631 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
632 | /* Only one FD; just open it. */ |
633 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
634 | return 0; |
635 | #else /* Sol 2.5, Irix, other? */ | |
636 | if (pi->tid == 0) /* Master procinfo for the process */ | |
637 | { | |
4d1bcd09 | 638 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
639 | if (fd <= 0) |
640 | return 0; /* fail */ | |
641 | } | |
642 | else /* LWP thread procinfo */ | |
643 | { | |
644 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
645 | procinfo *process; | |
646 | int lwpid = pi->tid; | |
647 | ||
648 | /* Find the procinfo for the entire process. */ | |
649 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
650 | return 0; /* fail */ | |
651 | ||
652 | /* Now obtain the file descriptor for the LWP. */ | |
653 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
654 | return 0; /* fail */ | |
655 | #else /* Irix, other? */ | |
656 | return 0; /* Don't know how to open threads */ | |
657 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
658 | } | |
659 | #endif /* OSF PIOCTSTATUS */ | |
660 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
661 | #endif /* NEW_PROC_API */ | |
c906108c | 662 | |
c3f6f71d JM |
663 | return 1; /* success */ |
664 | } | |
c906108c | 665 | |
c3f6f71d JM |
666 | /* |
667 | * Function: create_procinfo | |
668 | * | |
669 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 670 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
671 | * |
672 | * Return: pointer to new procinfo struct. | |
673 | */ | |
c906108c | 674 | |
c3f6f71d | 675 | static procinfo * |
fba45db2 | 676 | create_procinfo (int pid, int tid) |
c3f6f71d JM |
677 | { |
678 | procinfo *pi, *parent; | |
c906108c | 679 | |
0d06e24b | 680 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 681 | return pi; /* Already exists, nothing to do. */ |
c906108c | 682 | |
c3f6f71d JM |
683 | /* find parent before doing malloc, to save having to cleanup */ |
684 | if (tid != 0) | |
685 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
686 | create it if it | |
687 | doesn't exist yet? */ | |
c906108c | 688 | |
c3f6f71d JM |
689 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
690 | memset (pi, 0, sizeof (procinfo)); | |
691 | pi->pid = pid; | |
692 | pi->tid = tid; | |
c906108c | 693 | |
37de36c6 KB |
694 | #ifdef DYNAMIC_SYSCALLS |
695 | load_syscalls (pi); | |
696 | #endif | |
697 | ||
1d5e0602 KB |
698 | pi->saved_entryset = sysset_t_alloc (pi); |
699 | pi->saved_exitset = sysset_t_alloc (pi); | |
700 | ||
c3f6f71d JM |
701 | /* Chain into list. */ |
702 | if (tid == 0) | |
703 | { | |
704 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
705 | pi->next = procinfo_list; | |
706 | procinfo_list = pi; | |
707 | } | |
708 | else | |
709 | { | |
710 | #ifdef NEW_PROC_API | |
711 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
712 | #else | |
713 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
714 | #endif | |
715 | pi->next = parent->thread_list; | |
716 | parent->thread_list = pi; | |
717 | } | |
718 | return pi; | |
719 | } | |
c906108c | 720 | |
c3f6f71d JM |
721 | /* |
722 | * Function: close_procinfo_files | |
723 | * | |
724 | * Close all file descriptors associated with the procinfo | |
725 | */ | |
c906108c | 726 | |
c3f6f71d | 727 | static void |
fba45db2 | 728 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
729 | { |
730 | if (pi->ctl_fd > 0) | |
731 | close (pi->ctl_fd); | |
732 | #ifdef NEW_PROC_API | |
733 | if (pi->as_fd > 0) | |
734 | close (pi->as_fd); | |
735 | if (pi->status_fd > 0) | |
736 | close (pi->status_fd); | |
737 | #endif | |
738 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
739 | } | |
c906108c | 740 | |
c3f6f71d JM |
741 | /* |
742 | * Function: destroy_procinfo | |
743 | * | |
744 | * Destructor function. Close, unlink and deallocate the object. | |
745 | */ | |
c906108c | 746 | |
c3f6f71d | 747 | static void |
fba45db2 | 748 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
749 | { |
750 | procinfo *ptr; | |
751 | ||
752 | /* Step one: unlink the procinfo from its list */ | |
753 | if (pi == *list) | |
754 | *list = pi->next; | |
19958708 | 755 | else |
c3f6f71d JM |
756 | for (ptr = *list; ptr; ptr = ptr->next) |
757 | if (ptr->next == pi) | |
758 | { | |
759 | ptr->next = pi->next; | |
760 | break; | |
761 | } | |
7a292a7a | 762 | |
c3f6f71d JM |
763 | /* Step two: close any open file descriptors */ |
764 | close_procinfo_files (pi); | |
7a292a7a | 765 | |
c3f6f71d | 766 | /* Step three: free the memory. */ |
37de36c6 KB |
767 | #ifdef DYNAMIC_SYSCALLS |
768 | free_syscalls (pi); | |
769 | #endif | |
1d5e0602 KB |
770 | xfree (pi->saved_entryset); |
771 | xfree (pi->saved_exitset); | |
b8c9b27d | 772 | xfree (pi); |
c3f6f71d | 773 | } |
c906108c | 774 | |
c3f6f71d | 775 | static void |
fba45db2 | 776 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
777 | { |
778 | procinfo *tmp; | |
c906108c | 779 | |
c3f6f71d JM |
780 | if (pi->tid != 0) /* destroy a thread procinfo */ |
781 | { | |
782 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
783 | destroy_one_procinfo (&tmp->thread_list, pi); | |
784 | } | |
785 | else /* destroy a process procinfo and all its threads */ | |
786 | { | |
787 | /* First destroy the children, if any; */ | |
788 | while (pi->thread_list != NULL) | |
789 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
790 | /* Then destroy the parent. Genocide!!! */ | |
791 | destroy_one_procinfo (&procinfo_list, pi); | |
792 | } | |
793 | } | |
c906108c | 794 | |
004527cb AC |
795 | static void |
796 | do_destroy_procinfo_cleanup (void *pi) | |
797 | { | |
798 | destroy_procinfo (pi); | |
799 | } | |
800 | ||
c3f6f71d | 801 | enum { NOKILL, KILL }; |
c906108c | 802 | |
c3f6f71d JM |
803 | /* |
804 | * Function: dead_procinfo | |
805 | * | |
806 | * To be called on a non_recoverable error for a procinfo. | |
807 | * Prints error messages, optionally sends a SIGKILL to the process, | |
808 | * then destroys the data structure. | |
809 | */ | |
c906108c | 810 | |
c3f6f71d | 811 | static void |
fba45db2 | 812 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
813 | { |
814 | char procfile[80]; | |
c906108c | 815 | |
c3f6f71d JM |
816 | if (pi->pathname) |
817 | { | |
818 | print_sys_errmsg (pi->pathname, errno); | |
819 | } | |
820 | else | |
821 | { | |
822 | sprintf (procfile, "process %d", pi->pid); | |
823 | print_sys_errmsg (procfile, errno); | |
824 | } | |
825 | if (kill_p == KILL) | |
826 | kill (pi->pid, SIGKILL); | |
c906108c | 827 | |
c3f6f71d JM |
828 | destroy_procinfo (pi); |
829 | error (msg); | |
830 | } | |
c906108c | 831 | |
37de36c6 KB |
832 | /* |
833 | * Function: sysset_t_size | |
834 | * | |
835 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
836 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
837 | * size of sysset_t isn't known until runtime. | |
838 | */ | |
839 | ||
840 | static int | |
841 | sysset_t_size (procinfo * pi) | |
842 | { | |
843 | #ifndef DYNAMIC_SYSCALLS | |
844 | return sizeof (sysset_t); | |
845 | #else | |
846 | return sizeof (sysset_t) - sizeof (uint64_t) | |
847 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
848 | / (8 * sizeof (uint64_t))); | |
849 | #endif | |
850 | } | |
851 | ||
852 | /* Function: sysset_t_alloc | |
19958708 | 853 | |
37de36c6 KB |
854 | Allocate and (partially) initialize a sysset_t struct. */ |
855 | ||
856 | static sysset_t * | |
857 | sysset_t_alloc (procinfo * pi) | |
858 | { | |
859 | sysset_t *ret; | |
860 | int size = sysset_t_size (pi); | |
861 | ret = xmalloc (size); | |
862 | #ifdef DYNAMIC_SYSCALLS | |
863 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
864 | / (8 * sizeof (uint64_t)); | |
865 | #endif | |
866 | return ret; | |
867 | } | |
868 | ||
869 | #ifdef DYNAMIC_SYSCALLS | |
870 | ||
871 | /* Function: load_syscalls | |
19958708 | 872 | |
37de36c6 KB |
873 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
874 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
875 | with the names. (Certain numbers may be skipped in which case the | |
876 | names for these numbers will be left as NULL.) */ | |
877 | ||
878 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
879 | #define MAX_SYSCALLS 65536 | |
880 | ||
881 | static void | |
882 | load_syscalls (procinfo *pi) | |
883 | { | |
884 | char pathname[MAX_PROC_NAME_SIZE]; | |
885 | int sysent_fd; | |
886 | prsysent_t header; | |
887 | prsyscall_t *syscalls; | |
888 | int i, size, maxcall; | |
889 | ||
890 | pi->num_syscalls = 0; | |
891 | pi->syscall_names = 0; | |
892 | ||
893 | /* Open the file descriptor for the sysent file */ | |
894 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 895 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
896 | if (sysent_fd < 0) |
897 | { | |
898 | error ("load_syscalls: Can't open /proc/%d/sysent", pi->pid); | |
899 | } | |
900 | ||
901 | size = sizeof header - sizeof (prsyscall_t); | |
902 | if (read (sysent_fd, &header, size) != size) | |
903 | { | |
904 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
905 | } | |
906 | ||
907 | if (header.pr_nsyscalls == 0) | |
908 | { | |
909 | error ("load_syscalls: /proc/%d/sysent contains no syscalls!", pi->pid); | |
910 | } | |
911 | ||
912 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
913 | syscalls = xmalloc (size); | |
914 | ||
915 | if (read (sysent_fd, syscalls, size) != size) | |
916 | { | |
917 | xfree (syscalls); | |
918 | error ("load_syscalls: Error reading /proc/%d/sysent", pi->pid); | |
919 | } | |
920 | ||
921 | /* Find maximum syscall number. This may not be the same as | |
922 | pr_nsyscalls since that value refers to the number of entries | |
923 | in the table. (Also, the docs indicate that some system | |
924 | call numbers may be skipped.) */ | |
925 | ||
926 | maxcall = syscalls[0].pr_number; | |
927 | ||
928 | for (i = 1; i < header.pr_nsyscalls; i++) | |
929 | if (syscalls[i].pr_number > maxcall | |
930 | && syscalls[i].pr_nameoff > 0 | |
931 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
932 | maxcall = syscalls[i].pr_number; | |
933 | ||
934 | pi->num_syscalls = maxcall+1; | |
935 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
936 | ||
937 | for (i = 0; i < pi->num_syscalls; i++) | |
938 | pi->syscall_names[i] = NULL; | |
939 | ||
940 | /* Read the syscall names in */ | |
941 | for (i = 0; i < header.pr_nsyscalls; i++) | |
942 | { | |
943 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
944 | int nread; | |
945 | int callnum; | |
946 | ||
947 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
948 | || syscalls[i].pr_number < 0 | |
949 | || syscalls[i].pr_nameoff <= 0 | |
950 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
951 | != (off_t) syscalls[i].pr_nameoff)) | |
952 | continue; | |
953 | ||
954 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
955 | if (nread <= 0) | |
956 | continue; | |
957 | ||
958 | callnum = syscalls[i].pr_number; | |
959 | ||
960 | if (pi->syscall_names[callnum] != NULL) | |
961 | { | |
962 | /* FIXME: Generate warning */ | |
963 | continue; | |
964 | } | |
965 | ||
966 | namebuf[nread-1] = '\0'; | |
967 | size = strlen (namebuf) + 1; | |
968 | pi->syscall_names[callnum] = xmalloc (size); | |
969 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
970 | pi->syscall_names[callnum][size-1] = '\0'; | |
971 | } | |
19958708 | 972 | |
37de36c6 KB |
973 | close (sysent_fd); |
974 | xfree (syscalls); | |
975 | } | |
976 | ||
977 | /* Function: free_syscalls | |
19958708 | 978 | |
37de36c6 KB |
979 | Free the space allocated for the syscall names from the procinfo |
980 | structure. */ | |
981 | ||
982 | static void | |
983 | free_syscalls (procinfo *pi) | |
984 | { | |
985 | if (pi->syscall_names) | |
986 | { | |
987 | int i; | |
988 | ||
989 | for (i = 0; i < pi->num_syscalls; i++) | |
990 | if (pi->syscall_names[i] != NULL) | |
991 | xfree (pi->syscall_names[i]); | |
992 | ||
993 | xfree (pi->syscall_names); | |
994 | pi->syscall_names = 0; | |
995 | } | |
996 | } | |
997 | ||
998 | /* Function: find_syscall | |
999 | ||
1000 | Given a name, look up (and return) the corresponding syscall number. | |
1001 | If no match is found, return -1. */ | |
19958708 | 1002 | |
37de36c6 KB |
1003 | static int |
1004 | find_syscall (procinfo *pi, char *name) | |
1005 | { | |
1006 | int i; | |
1007 | for (i = 0; i < pi->num_syscalls; i++) | |
1008 | { | |
1009 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1010 | return i; | |
1011 | } | |
1012 | return -1; | |
1013 | } | |
1014 | #endif | |
1015 | ||
c3f6f71d | 1016 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1017 | |
c3f6f71d | 1018 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1019 | |
c3f6f71d JM |
1020 | /* |
1021 | * This "module" is the interface layer between the /proc system API | |
19958708 | 1022 | * and the gdb target vector functions. This layer consists of |
c3f6f71d JM |
1023 | * access functions that encapsulate each of the basic operations |
1024 | * that we need to use from the /proc API. | |
1025 | * | |
1026 | * The main motivation for this layer is to hide the fact that | |
1027 | * there are two very different implementations of the /proc API. | |
1028 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1029 | * functions, we do our best to hide them all in here. | |
1030 | */ | |
c906108c | 1031 | |
a14ed312 KB |
1032 | int proc_get_status (procinfo * pi); |
1033 | long proc_flags (procinfo * pi); | |
1034 | int proc_why (procinfo * pi); | |
1035 | int proc_what (procinfo * pi); | |
1036 | int proc_set_run_on_last_close (procinfo * pi); | |
1037 | int proc_unset_run_on_last_close (procinfo * pi); | |
1038 | int proc_set_inherit_on_fork (procinfo * pi); | |
1039 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1040 | int proc_set_async (procinfo * pi); | |
1041 | int proc_unset_async (procinfo * pi); | |
1042 | int proc_stop_process (procinfo * pi); | |
1043 | int proc_trace_signal (procinfo * pi, int signo); | |
1044 | int proc_ignore_signal (procinfo * pi, int signo); | |
1045 | int proc_clear_current_fault (procinfo * pi); | |
1046 | int proc_set_current_signal (procinfo * pi, int signo); | |
1047 | int proc_clear_current_signal (procinfo * pi); | |
1048 | int proc_set_gregs (procinfo * pi); | |
1049 | int proc_set_fpregs (procinfo * pi); | |
1050 | int proc_wait_for_stop (procinfo * pi); | |
1051 | int proc_run_process (procinfo * pi, int step, int signo); | |
1052 | int proc_kill (procinfo * pi, int signo); | |
1053 | int proc_parent_pid (procinfo * pi); | |
1054 | int proc_get_nthreads (procinfo * pi); | |
1055 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1056 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1057 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1058 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1059 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1060 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1061 | |
1062 | int proc_update_threads (procinfo * pi); | |
1063 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1064 | int (*func) (procinfo *, procinfo *, void *), |
1065 | void *ptr); | |
a14ed312 KB |
1066 | |
1067 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1068 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1069 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1070 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1071 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1072 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1073 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1074 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1075 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1076 | |
1077 | void proc_warn (procinfo * pi, char *func, int line); | |
1078 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1079 | |
c3f6f71d | 1080 | void |
fba45db2 | 1081 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1082 | { |
1083 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1084 | print_sys_errmsg (errmsg, errno); | |
1085 | } | |
c906108c | 1086 | |
c3f6f71d | 1087 | void |
fba45db2 | 1088 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1089 | { |
1090 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1091 | perror_with_name (errmsg); | |
1092 | } | |
c906108c | 1093 | |
c3f6f71d JM |
1094 | /* |
1095 | * Function: proc_get_status | |
1096 | * | |
1097 | * Updates the status struct in the procinfo. | |
1098 | * There is a 'valid' flag, to let other functions know when | |
1099 | * this function needs to be called (so the status is only | |
1100 | * read when it is needed). The status file descriptor is | |
1101 | * also only opened when it is needed. | |
1102 | * | |
1103 | * Return: non-zero for success, zero for failure. | |
1104 | */ | |
c906108c | 1105 | |
c3f6f71d | 1106 | int |
fba45db2 | 1107 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1108 | { |
1109 | /* Status file descriptor is opened "lazily" */ | |
1110 | if (pi->status_fd == 0 && | |
1111 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1112 | { | |
1113 | pi->status_valid = 0; | |
1114 | return 0; | |
1115 | } | |
c906108c | 1116 | |
c3f6f71d JM |
1117 | #ifdef NEW_PROC_API |
1118 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1119 | pi->status_valid = 0; /* fail */ | |
1120 | else | |
1121 | { | |
19958708 | 1122 | /* Sigh... I have to read a different data structure, |
c3f6f71d JM |
1123 | depending on whether this is a main process or an LWP. */ |
1124 | if (pi->tid) | |
19958708 RM |
1125 | pi->status_valid = (read (pi->status_fd, |
1126 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1127 | sizeof (lwpstatus_t)) |
1128 | == sizeof (lwpstatus_t)); | |
1129 | else | |
1130 | { | |
19958708 | 1131 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1132 | (char *) &pi->prstatus, |
1133 | sizeof (gdb_prstatus_t)) | |
1134 | == sizeof (gdb_prstatus_t)); | |
1135 | #if 0 /*def UNIXWARE*/ | |
1136 | if (pi->status_valid && | |
1137 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1138 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1139 | /* Unixware peculiarity -- read the damn thing again! */ | |
19958708 | 1140 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1141 | (char *) &pi->prstatus, |
1142 | sizeof (gdb_prstatus_t)) | |
1143 | == sizeof (gdb_prstatus_t)); | |
1144 | #endif /* UNIXWARE */ | |
1145 | } | |
1146 | } | |
1147 | #else /* ioctl method */ | |
1148 | #ifdef PIOCTSTATUS /* osf */ | |
1149 | if (pi->tid == 0) /* main process */ | |
1150 | { | |
1151 | /* Just read the danged status. Now isn't that simple? */ | |
19958708 | 1152 | pi->status_valid = |
c3f6f71d JM |
1153 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1154 | } | |
1155 | else | |
1156 | { | |
1157 | int win; | |
1158 | struct { | |
1159 | long pr_count; | |
1160 | tid_t pr_error_thread; | |
1161 | struct prstatus status; | |
1162 | } thread_status; | |
1163 | ||
1164 | thread_status.pr_count = 1; | |
1165 | thread_status.status.pr_tid = pi->tid; | |
1166 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1167 | if (win) | |
1168 | { | |
19958708 | 1169 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1170 | sizeof (pi->prstatus)); |
1171 | pi->status_valid = 1; | |
1172 | } | |
1173 | } | |
1174 | #else | |
1175 | /* Just read the danged status. Now isn't that simple? */ | |
1176 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1177 | #endif | |
1178 | #endif | |
c906108c | 1179 | |
c3f6f71d JM |
1180 | if (pi->status_valid) |
1181 | { | |
19958708 | 1182 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1183 | proc_why (pi), |
19958708 | 1184 | proc_what (pi), |
c3f6f71d JM |
1185 | proc_get_current_thread (pi)); |
1186 | } | |
c906108c | 1187 | |
c3f6f71d JM |
1188 | /* The status struct includes general regs, so mark them valid too */ |
1189 | pi->gregs_valid = pi->status_valid; | |
1190 | #ifdef NEW_PROC_API | |
19958708 | 1191 | /* In the read/write multiple-fd model, |
c3f6f71d JM |
1192 | the status struct includes the fp regs too, so mark them valid too */ |
1193 | pi->fpregs_valid = pi->status_valid; | |
1194 | #endif | |
1195 | return pi->status_valid; /* True if success, false if failure. */ | |
1196 | } | |
c906108c | 1197 | |
c3f6f71d JM |
1198 | /* |
1199 | * Function: proc_flags | |
1200 | * | |
1201 | * returns the process flags (pr_flags field). | |
19958708 | 1202 | */ |
c3f6f71d JM |
1203 | |
1204 | long | |
fba45db2 | 1205 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1206 | { |
1207 | if (!pi->status_valid) | |
1208 | if (!proc_get_status (pi)) | |
1209 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1210 | |
c3f6f71d | 1211 | #ifdef NEW_PROC_API |
0d06e24b JM |
1212 | # ifdef UNIXWARE |
1213 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1214 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1215 | The two sets of flags don't overlap. */ | |
1216 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1217 | # else | |
c3f6f71d | 1218 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1219 | # endif |
c3f6f71d JM |
1220 | #else |
1221 | return pi->prstatus.pr_flags; | |
1222 | #endif | |
1223 | } | |
c906108c | 1224 | |
c3f6f71d JM |
1225 | /* |
1226 | * Function: proc_why | |
1227 | * | |
1228 | * returns the pr_why field (why the process stopped). | |
1229 | */ | |
c906108c | 1230 | |
c3f6f71d | 1231 | int |
fba45db2 | 1232 | proc_why (procinfo *pi) |
c3f6f71d JM |
1233 | { |
1234 | if (!pi->status_valid) | |
1235 | if (!proc_get_status (pi)) | |
1236 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1237 | |
c3f6f71d JM |
1238 | #ifdef NEW_PROC_API |
1239 | return pi->prstatus.pr_lwp.pr_why; | |
1240 | #else | |
1241 | return pi->prstatus.pr_why; | |
1242 | #endif | |
1243 | } | |
c906108c | 1244 | |
c3f6f71d JM |
1245 | /* |
1246 | * Function: proc_what | |
1247 | * | |
1248 | * returns the pr_what field (details of why the process stopped). | |
1249 | */ | |
c906108c | 1250 | |
c3f6f71d | 1251 | int |
fba45db2 | 1252 | proc_what (procinfo *pi) |
c3f6f71d JM |
1253 | { |
1254 | if (!pi->status_valid) | |
1255 | if (!proc_get_status (pi)) | |
1256 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1257 | |
c3f6f71d JM |
1258 | #ifdef NEW_PROC_API |
1259 | return pi->prstatus.pr_lwp.pr_what; | |
1260 | #else | |
1261 | return pi->prstatus.pr_what; | |
c906108c | 1262 | #endif |
c3f6f71d | 1263 | } |
c906108c | 1264 | |
c3f6f71d JM |
1265 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1266 | /* | |
1267 | * Function: proc_nsysarg | |
1268 | * | |
1269 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1270 | */ | |
1271 | ||
1272 | int | |
fba45db2 | 1273 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1274 | { |
1275 | if (!pi->status_valid) | |
1276 | if (!proc_get_status (pi)) | |
1277 | return 0; | |
19958708 | 1278 | |
c3f6f71d JM |
1279 | #ifdef NEW_PROC_API |
1280 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1281 | #else | |
1282 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1283 | #endif |
c3f6f71d | 1284 | } |
c906108c | 1285 | |
c3f6f71d JM |
1286 | /* |
1287 | * Function: proc_sysargs | |
1288 | * | |
1289 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1290 | */ | |
c906108c | 1291 | |
c3f6f71d | 1292 | long * |
fba45db2 | 1293 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1294 | { |
1295 | if (!pi->status_valid) | |
1296 | if (!proc_get_status (pi)) | |
1297 | return NULL; | |
19958708 | 1298 | |
c3f6f71d JM |
1299 | #ifdef NEW_PROC_API |
1300 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1301 | #else | |
1302 | return (long *) &pi->prstatus.pr_sysarg; | |
1303 | #endif | |
1304 | } | |
c906108c | 1305 | |
c3f6f71d JM |
1306 | /* |
1307 | * Function: proc_syscall | |
1308 | * | |
1309 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1310 | */ | |
c906108c | 1311 | |
c3f6f71d | 1312 | int |
fba45db2 | 1313 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1314 | { |
1315 | if (!pi->status_valid) | |
1316 | if (!proc_get_status (pi)) | |
1317 | return 0; | |
19958708 | 1318 | |
c3f6f71d JM |
1319 | #ifdef NEW_PROC_API |
1320 | return pi->prstatus.pr_lwp.pr_syscall; | |
1321 | #else | |
1322 | return pi->prstatus.pr_syscall; | |
1323 | #endif | |
1324 | } | |
1325 | #endif /* PIOCSSPCACT */ | |
c906108c | 1326 | |
c3f6f71d JM |
1327 | /* |
1328 | * Function: proc_cursig: | |
1329 | * | |
1330 | * returns the pr_cursig field (current signal). | |
1331 | */ | |
c906108c | 1332 | |
c3f6f71d JM |
1333 | long |
1334 | proc_cursig (struct procinfo *pi) | |
1335 | { | |
1336 | if (!pi->status_valid) | |
1337 | if (!proc_get_status (pi)) | |
1338 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1339 | |
c3f6f71d JM |
1340 | #ifdef NEW_PROC_API |
1341 | return pi->prstatus.pr_lwp.pr_cursig; | |
1342 | #else | |
1343 | return pi->prstatus.pr_cursig; | |
1344 | #endif | |
1345 | } | |
c906108c | 1346 | |
c3f6f71d | 1347 | /* |
19958708 | 1348 | * Function: proc_modify_flag |
c3f6f71d | 1349 | * |
19958708 | 1350 | * === I appologize for the messiness of this function. |
c3f6f71d JM |
1351 | * === This is an area where the different versions of |
1352 | * === /proc are more inconsistent than usual. MVS | |
1353 | * | |
1354 | * Set or reset any of the following process flags: | |
1355 | * PR_FORK -- forked child will inherit trace flags | |
1356 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1357 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1358 | * PR_ASYNC -- LWP's get to run/stop independently. |
1359 | * | |
1360 | * There are three methods for doing this function: | |
1361 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1362 | * [Sol6, Sol7, UW] | |
1363 | * 2) Middle: PIOCSET/PIOCRESET | |
1364 | * [Irix, Sol5] | |
1365 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1366 | * [OSF, Sol5] | |
1367 | * | |
1368 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1369 | * Note: OSF does not define PR_KLC. |
1370 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d | 1371 | * |
19958708 | 1372 | * Arguments: |
c3f6f71d JM |
1373 | * pi -- the procinfo |
1374 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1375 | * mode -- 1 for set, 0 for reset. | |
1376 | * | |
1377 | * Returns non-zero for success, zero for failure. | |
1378 | */ | |
c906108c | 1379 | |
c3f6f71d | 1380 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1381 | |
c3f6f71d | 1382 | static int |
fba45db2 | 1383 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1384 | { |
1385 | long win = 0; /* default to fail */ | |
1386 | ||
19958708 RM |
1387 | /* |
1388 | * These operations affect the process as a whole, and applying | |
1389 | * them to an individual LWP has the same meaning as applying them | |
1390 | * to the main process. Therefore, if we're ever called with a | |
1391 | * pointer to an LWP's procinfo, let's substitute the process's | |
1392 | * procinfo and avoid opening the LWP's file descriptor | |
1393 | * unnecessarily. | |
c3f6f71d JM |
1394 | */ |
1395 | ||
1396 | if (pi->pid != 0) | |
1397 | pi = find_procinfo_or_die (pi->pid, 0); | |
1398 | ||
1399 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
19958708 | 1400 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1401 | (which for no obvious reason has a different definition |
1402 | from one operating system to the next...) */ | |
1403 | #ifdef PCUNSET | |
1404 | #define GDBRESET PCUNSET | |
37de36c6 | 1405 | #else |
c3f6f71d JM |
1406 | #ifdef PCRESET |
1407 | #define GDBRESET PCRESET | |
37de36c6 | 1408 | #endif |
c906108c | 1409 | #endif |
c3f6f71d | 1410 | { |
37de36c6 | 1411 | procfs_ctl_t arg[2]; |
c906108c | 1412 | |
c3f6f71d JM |
1413 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1414 | arg[0] = PCSET; | |
1415 | else /* Reset the flag */ | |
1416 | arg[0] = GDBRESET; | |
c5aa993b | 1417 | |
c3f6f71d JM |
1418 | arg[1] = flag; |
1419 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1420 | } | |
1421 | #else | |
1422 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1423 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1424 | { | |
1425 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1426 | } | |
1427 | else /* Reset the flag */ | |
1428 | { | |
1429 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1430 | } | |
c906108c | 1431 | |
c3f6f71d JM |
1432 | #else |
1433 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1434 | switch (flag) { | |
1435 | case PR_RLC: | |
1436 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1437 | { | |
1438 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1439 | } | |
1440 | else /* Clear run-on-last-close */ | |
1441 | { | |
1442 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1443 | } | |
1444 | break; | |
1445 | case PR_FORK: | |
1446 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1447 | { | |
1448 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1449 | } | |
1450 | else /* Clear inherit-on-fork */ | |
1451 | { | |
1452 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1453 | } | |
1454 | break; | |
1455 | default: | |
1456 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1457 | break; | |
1458 | } | |
1459 | #endif | |
1460 | #endif | |
1461 | #endif | |
1462 | #undef GDBRESET | |
1463 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1464 | pi->status_valid = 0; | |
c906108c | 1465 | |
c3f6f71d | 1466 | if (!win) |
19958708 | 1467 | warning ("procfs: modify_flag failed to turn %s %s", |
c3f6f71d JM |
1468 | flag == PR_FORK ? "PR_FORK" : |
1469 | flag == PR_RLC ? "PR_RLC" : | |
1470 | #ifdef PR_ASYNC | |
1471 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1472 | #endif |
1473 | #ifdef PR_KLC | |
1474 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1475 | #endif |
1476 | "<unknown flag>", | |
1477 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1478 | |
c3f6f71d JM |
1479 | return win; |
1480 | } | |
c906108c | 1481 | |
c3f6f71d JM |
1482 | /* |
1483 | * Function: proc_set_run_on_last_close | |
1484 | * | |
1485 | * Set the run_on_last_close flag. | |
1486 | * Process with all threads will become runnable | |
1487 | * when debugger closes all /proc fds. | |
1488 | * | |
1489 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1490 | */ |
1491 | ||
c3f6f71d | 1492 | int |
fba45db2 | 1493 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1494 | { |
c3f6f71d JM |
1495 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1496 | } | |
c906108c | 1497 | |
c3f6f71d JM |
1498 | /* |
1499 | * Function: proc_unset_run_on_last_close | |
1500 | * | |
1501 | * Reset the run_on_last_close flag. | |
1502 | * Process will NOT become runnable | |
1503 | * when debugger closes its file handles. | |
1504 | * | |
1505 | * Returns non-zero for success, zero for failure. | |
1506 | */ | |
c906108c | 1507 | |
c3f6f71d | 1508 | int |
fba45db2 | 1509 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1510 | { |
1511 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1512 | } |
1513 | ||
0d06e24b JM |
1514 | #ifdef PR_KLC |
1515 | /* | |
1516 | * Function: proc_set_kill_on_last_close | |
1517 | * | |
1518 | * Set the kill_on_last_close flag. | |
1519 | * Process with all threads will be killed when debugger | |
1520 | * closes all /proc fds (or debugger exits or dies). | |
1521 | * | |
1522 | * Returns non-zero for success, zero for failure. | |
1523 | */ | |
1524 | ||
1525 | int | |
fba45db2 | 1526 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1527 | { |
1528 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * Function: proc_unset_kill_on_last_close | |
1533 | * | |
1534 | * Reset the kill_on_last_close flag. | |
19958708 | 1535 | * Process will NOT be killed when debugger |
0d06e24b JM |
1536 | * closes its file handles (or exits or dies). |
1537 | * | |
1538 | * Returns non-zero for success, zero for failure. | |
1539 | */ | |
1540 | ||
1541 | int | |
fba45db2 | 1542 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1543 | { |
1544 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1545 | } | |
1546 | #endif /* PR_KLC */ | |
1547 | ||
c906108c | 1548 | /* |
c3f6f71d JM |
1549 | * Function: proc_set_inherit_on_fork |
1550 | * | |
1551 | * Set inherit_on_fork flag. | |
1552 | * If the process forks a child while we are registered for events | |
1553 | * in the parent, then we will also recieve events from the child. | |
1554 | * | |
1555 | * Returns non-zero for success, zero for failure. | |
1556 | */ | |
c906108c | 1557 | |
c3f6f71d | 1558 | int |
fba45db2 | 1559 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1560 | { |
1561 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1562 | } | |
c5aa993b | 1563 | |
c3f6f71d JM |
1564 | /* |
1565 | * Function: proc_unset_inherit_on_fork | |
1566 | * | |
1567 | * Reset inherit_on_fork flag. | |
1568 | * If the process forks a child while we are registered for events | |
1569 | * in the parent, then we will NOT recieve events from the child. | |
1570 | * | |
1571 | * Returns non-zero for success, zero for failure. | |
1572 | */ | |
c906108c | 1573 | |
c3f6f71d | 1574 | int |
fba45db2 | 1575 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1576 | { |
1577 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1578 | } | |
c906108c | 1579 | |
c3f6f71d JM |
1580 | #ifdef PR_ASYNC |
1581 | /* | |
1582 | * Function: proc_set_async | |
1583 | * | |
1584 | * Set PR_ASYNC flag. | |
19958708 | 1585 | * If one LWP stops because of a debug event (signal etc.), |
c3f6f71d JM |
1586 | * the remaining LWPs will continue to run. |
1587 | * | |
1588 | * Returns non-zero for success, zero for failure. | |
1589 | */ | |
c906108c | 1590 | |
c3f6f71d | 1591 | int |
fba45db2 | 1592 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1593 | { |
1594 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1595 | } | |
c906108c | 1596 | |
c3f6f71d JM |
1597 | /* |
1598 | * Function: proc_unset_async | |
1599 | * | |
1600 | * Reset PR_ASYNC flag. | |
1601 | * If one LWP stops because of a debug event (signal etc.), | |
1602 | * then all other LWPs will stop as well. | |
1603 | * | |
1604 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1605 | */ |
1606 | ||
c3f6f71d | 1607 | int |
fba45db2 | 1608 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1609 | { |
1610 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1611 | } | |
1612 | #endif /* PR_ASYNC */ | |
c906108c SS |
1613 | |
1614 | /* | |
c3f6f71d JM |
1615 | * Function: proc_stop_process |
1616 | * | |
1617 | * Request the process/LWP to stop. Does not wait. | |
19958708 | 1618 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1619 | */ |
c906108c | 1620 | |
c3f6f71d | 1621 | int |
fba45db2 | 1622 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1623 | { |
1624 | int win; | |
c906108c | 1625 | |
c3f6f71d JM |
1626 | /* |
1627 | * We might conceivably apply this operation to an LWP, and | |
1628 | * the LWP's ctl file descriptor might not be open. | |
1629 | */ | |
c906108c | 1630 | |
c3f6f71d JM |
1631 | if (pi->ctl_fd == 0 && |
1632 | open_procinfo_files (pi, FD_CTL) == 0) | |
1633 | return 0; | |
1634 | else | |
1635 | { | |
1636 | #ifdef NEW_PROC_API | |
37de36c6 | 1637 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1638 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1639 | #else /* ioctl method */ | |
1640 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1641 | /* Note: the call also reads the prstatus. */ | |
1642 | if (win) | |
1643 | { | |
1644 | pi->status_valid = 1; | |
19958708 | 1645 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1646 | proc_why (pi), |
19958708 | 1647 | proc_what (pi), |
c3f6f71d JM |
1648 | proc_get_current_thread (pi)); |
1649 | } | |
1650 | #endif | |
1651 | } | |
c906108c | 1652 | |
c3f6f71d JM |
1653 | return win; |
1654 | } | |
c5aa993b | 1655 | |
c3f6f71d JM |
1656 | /* |
1657 | * Function: proc_wait_for_stop | |
1658 | * | |
1659 | * Wait for the process or LWP to stop (block until it does). | |
19958708 | 1660 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1661 | */ |
1662 | ||
c3f6f71d | 1663 | int |
fba45db2 | 1664 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1665 | { |
c3f6f71d JM |
1666 | int win; |
1667 | ||
1668 | /* | |
1669 | * We should never have to apply this operation to any procinfo | |
1670 | * except the one for the main process. If that ever changes | |
19958708 | 1671 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1672 | * replace it with one that makes sure the ctl_fd is open. |
1673 | */ | |
19958708 | 1674 | |
c3f6f71d JM |
1675 | if (pi->tid != 0) |
1676 | pi = find_procinfo_or_die (pi->pid, 0); | |
1677 | ||
1678 | #ifdef NEW_PROC_API | |
1679 | { | |
37de36c6 | 1680 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1681 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1682 | /* We been runnin' and we stopped -- need to update status. */ | |
1683 | pi->status_valid = 0; | |
1684 | } | |
1685 | #else /* ioctl method */ | |
1686 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1687 | /* Above call also refreshes the prstatus. */ | |
1688 | if (win) | |
1689 | { | |
1690 | pi->status_valid = 1; | |
19958708 | 1691 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1692 | proc_why (pi), |
19958708 | 1693 | proc_what (pi), |
c3f6f71d JM |
1694 | proc_get_current_thread (pi)); |
1695 | } | |
c906108c SS |
1696 | #endif |
1697 | ||
c3f6f71d | 1698 | return win; |
c906108c SS |
1699 | } |
1700 | ||
1701 | /* | |
c3f6f71d JM |
1702 | * Function: proc_run_process |
1703 | * | |
1704 | * Make the process or LWP runnable. | |
1705 | * Options (not all are implemented): | |
1706 | * - single-step | |
1707 | * - clear current fault | |
1708 | * - clear current signal | |
1709 | * - abort the current system call | |
1710 | * - stop as soon as finished with system call | |
1711 | * - (ioctl): set traced signal set | |
1712 | * - (ioctl): set held signal set | |
1713 | * - (ioctl): set traced fault set | |
1714 | * - (ioctl): set start pc (vaddr) | |
1715 | * Always clear the current fault. | |
1716 | * Clear the current signal if 'signo' is zero. | |
1717 | * | |
1718 | * Arguments: | |
1719 | * pi the process or LWP to operate on. | |
1720 | * step if true, set the process or LWP to trap after one instr. | |
1721 | * signo if zero, clear the current signal if any. | |
1722 | * if non-zero, set the current signal to this one. | |
1723 | * | |
19958708 | 1724 | * Returns non-zero for success, zero for failure. |
c3f6f71d JM |
1725 | */ |
1726 | ||
1727 | int | |
fba45db2 | 1728 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1729 | { |
1730 | int win; | |
1731 | int runflags; | |
1732 | ||
1733 | /* | |
1734 | * We will probably have to apply this operation to individual threads, | |
1735 | * so make sure the control file descriptor is open. | |
1736 | */ | |
19958708 | 1737 | |
c3f6f71d JM |
1738 | if (pi->ctl_fd == 0 && |
1739 | open_procinfo_files (pi, FD_CTL) == 0) | |
1740 | { | |
1741 | return 0; | |
1742 | } | |
c906108c | 1743 | |
c3f6f71d JM |
1744 | runflags = PRCFAULT; /* always clear current fault */ |
1745 | if (step) | |
1746 | runflags |= PRSTEP; | |
1747 | if (signo == 0) | |
1748 | runflags |= PRCSIG; | |
1749 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1750 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1751 | |
c3f6f71d JM |
1752 | #ifdef NEW_PROC_API |
1753 | { | |
37de36c6 | 1754 | procfs_ctl_t cmd[2]; |
c906108c | 1755 | |
c3f6f71d JM |
1756 | cmd[0] = PCRUN; |
1757 | cmd[1] = runflags; | |
1758 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1759 | } | |
1760 | #else /* ioctl method */ | |
1761 | { | |
1762 | prrun_t prrun; | |
c906108c | 1763 | |
c3f6f71d JM |
1764 | memset (&prrun, 0, sizeof (prrun)); |
1765 | prrun.pr_flags = runflags; | |
1766 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1767 | } | |
1768 | #endif | |
c906108c | 1769 | |
c3f6f71d JM |
1770 | return win; |
1771 | } | |
c906108c | 1772 | |
c3f6f71d JM |
1773 | /* |
1774 | * Function: proc_set_traced_signals | |
1775 | * | |
1776 | * Register to trace signals in the process or LWP. | |
19958708 | 1777 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1778 | */ |
1779 | ||
c3f6f71d | 1780 | int |
37de36c6 | 1781 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1782 | { |
c3f6f71d JM |
1783 | int win; |
1784 | ||
1785 | /* | |
1786 | * We should never have to apply this operation to any procinfo | |
1787 | * except the one for the main process. If that ever changes | |
19958708 | 1788 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1789 | * replace it with one that makes sure the ctl_fd is open. |
1790 | */ | |
19958708 | 1791 | |
c3f6f71d JM |
1792 | if (pi->tid != 0) |
1793 | pi = find_procinfo_or_die (pi->pid, 0); | |
1794 | ||
1795 | #ifdef NEW_PROC_API | |
1796 | { | |
1797 | struct { | |
37de36c6 | 1798 | procfs_ctl_t cmd; |
c3f6f71d | 1799 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1800 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1801 | } arg; |
c906108c | 1802 | |
c3f6f71d | 1803 | arg.cmd = PCSTRACE; |
37de36c6 | 1804 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1805 | |
c3f6f71d JM |
1806 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1807 | } | |
1808 | #else /* ioctl method */ | |
1809 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1810 | #endif | |
1811 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1812 | pi->status_valid = 0; | |
c906108c | 1813 | |
c3f6f71d JM |
1814 | if (!win) |
1815 | warning ("procfs: set_traced_signals failed"); | |
1816 | return win; | |
c906108c SS |
1817 | } |
1818 | ||
1819 | /* | |
c3f6f71d JM |
1820 | * Function: proc_set_traced_faults |
1821 | * | |
1822 | * Register to trace hardware faults in the process or LWP. | |
19958708 | 1823 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1824 | */ |
c906108c | 1825 | |
c3f6f71d | 1826 | int |
fba45db2 | 1827 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1828 | { |
1829 | int win; | |
1830 | ||
1831 | /* | |
1832 | * We should never have to apply this operation to any procinfo | |
1833 | * except the one for the main process. If that ever changes | |
19958708 | 1834 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1835 | * replace it with one that makes sure the ctl_fd is open. |
1836 | */ | |
19958708 | 1837 | |
c3f6f71d JM |
1838 | if (pi->tid != 0) |
1839 | pi = find_procinfo_or_die (pi->pid, 0); | |
1840 | ||
1841 | #ifdef NEW_PROC_API | |
1842 | { | |
1843 | struct { | |
37de36c6 | 1844 | procfs_ctl_t cmd; |
c3f6f71d JM |
1845 | /* Use char array to avoid alignment issues. */ |
1846 | char fltset[sizeof (fltset_t)]; | |
1847 | } arg; | |
c906108c | 1848 | |
c3f6f71d JM |
1849 | arg.cmd = PCSFAULT; |
1850 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1851 | |
c3f6f71d JM |
1852 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1853 | } | |
1854 | #else /* ioctl method */ | |
1855 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1856 | #endif | |
1857 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1858 | pi->status_valid = 0; | |
c906108c | 1859 | |
c3f6f71d JM |
1860 | return win; |
1861 | } | |
c5aa993b | 1862 | |
c3f6f71d JM |
1863 | /* |
1864 | * Function: proc_set_traced_sysentry | |
1865 | * | |
1866 | * Register to trace entry to system calls in the process or LWP. | |
19958708 | 1867 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1868 | */ |
1869 | ||
c3f6f71d | 1870 | int |
fba45db2 | 1871 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1872 | { |
c3f6f71d JM |
1873 | int win; |
1874 | ||
1875 | /* | |
1876 | * We should never have to apply this operation to any procinfo | |
1877 | * except the one for the main process. If that ever changes | |
19958708 | 1878 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1879 | * replace it with one that makes sure the ctl_fd is open. |
1880 | */ | |
19958708 | 1881 | |
c3f6f71d JM |
1882 | if (pi->tid != 0) |
1883 | pi = find_procinfo_or_die (pi->pid, 0); | |
1884 | ||
1885 | #ifdef NEW_PROC_API | |
1886 | { | |
37de36c6 KB |
1887 | struct gdb_proc_ctl_pcsentry { |
1888 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1889 | /* Use char array to avoid alignment issues. */ |
1890 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1891 | } *argp; |
1892 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1893 | - sizeof (sysset_t) | |
1894 | + sysset_t_size (pi); | |
c3f6f71d | 1895 | |
37de36c6 | 1896 | argp = xmalloc (argp_size); |
c3f6f71d | 1897 | |
37de36c6 KB |
1898 | argp->cmd = PCSENTRY; |
1899 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1900 | ||
1901 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1902 | xfree (argp); | |
c3f6f71d JM |
1903 | } |
1904 | #else /* ioctl method */ | |
1905 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1906 | #endif | |
1907 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1908 | pi->status_valid = 0; | |
19958708 | 1909 | |
c3f6f71d | 1910 | return win; |
c906108c SS |
1911 | } |
1912 | ||
1913 | /* | |
c3f6f71d JM |
1914 | * Function: proc_set_traced_sysexit |
1915 | * | |
1916 | * Register to trace exit from system calls in the process or LWP. | |
19958708 | 1917 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1918 | */ |
c906108c | 1919 | |
c3f6f71d | 1920 | int |
fba45db2 | 1921 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1922 | { |
1923 | int win; | |
1924 | ||
1925 | /* | |
1926 | * We should never have to apply this operation to any procinfo | |
1927 | * except the one for the main process. If that ever changes | |
19958708 | 1928 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1929 | * replace it with one that makes sure the ctl_fd is open. |
1930 | */ | |
19958708 | 1931 | |
c3f6f71d JM |
1932 | if (pi->tid != 0) |
1933 | pi = find_procinfo_or_die (pi->pid, 0); | |
1934 | ||
1935 | #ifdef NEW_PROC_API | |
1936 | { | |
37de36c6 KB |
1937 | struct gdb_proc_ctl_pcsexit { |
1938 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1939 | /* Use char array to avoid alignment issues. */ |
1940 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1941 | } *argp; |
1942 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1943 | - sizeof (sysset_t) | |
1944 | + sysset_t_size (pi); | |
c906108c | 1945 | |
37de36c6 | 1946 | argp = xmalloc (argp_size); |
c906108c | 1947 | |
37de36c6 KB |
1948 | argp->cmd = PCSEXIT; |
1949 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1950 | ||
1951 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1952 | xfree (argp); | |
c3f6f71d JM |
1953 | } |
1954 | #else /* ioctl method */ | |
1955 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1956 | #endif | |
1957 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1958 | pi->status_valid = 0; | |
c906108c | 1959 | |
c3f6f71d JM |
1960 | return win; |
1961 | } | |
c906108c | 1962 | |
c3f6f71d JM |
1963 | /* |
1964 | * Function: proc_set_held_signals | |
1965 | * | |
1966 | * Specify the set of blocked / held signals in the process or LWP. | |
19958708 | 1967 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1968 | */ |
1969 | ||
c3f6f71d | 1970 | int |
37de36c6 | 1971 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1972 | { |
c3f6f71d JM |
1973 | int win; |
1974 | ||
1975 | /* | |
1976 | * We should never have to apply this operation to any procinfo | |
1977 | * except the one for the main process. If that ever changes | |
19958708 | 1978 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1979 | * replace it with one that makes sure the ctl_fd is open. |
1980 | */ | |
19958708 | 1981 | |
c3f6f71d JM |
1982 | if (pi->tid != 0) |
1983 | pi = find_procinfo_or_die (pi->pid, 0); | |
1984 | ||
1985 | #ifdef NEW_PROC_API | |
1986 | { | |
1987 | struct { | |
37de36c6 | 1988 | procfs_ctl_t cmd; |
c3f6f71d | 1989 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1990 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1991 | } arg; |
1992 | ||
1993 | arg.cmd = PCSHOLD; | |
37de36c6 | 1994 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1995 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1996 | } | |
c906108c | 1997 | #else |
c3f6f71d | 1998 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1999 | #endif |
c3f6f71d JM |
2000 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
2001 | pi->status_valid = 0; | |
2002 | ||
2003 | return win; | |
c906108c SS |
2004 | } |
2005 | ||
2006 | /* | |
c3f6f71d JM |
2007 | * Function: proc_get_pending_signals |
2008 | * | |
2009 | * returns the set of signals that are pending in the process or LWP. | |
2010 | * Will also copy the sigset if 'save' is non-zero. | |
2011 | */ | |
c906108c | 2012 | |
37de36c6 KB |
2013 | gdb_sigset_t * |
2014 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 2015 | { |
37de36c6 | 2016 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2017 | |
2018 | /* | |
2019 | * We should never have to apply this operation to any procinfo | |
2020 | * except the one for the main process. If that ever changes | |
19958708 | 2021 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2022 | * replace it with one that makes sure the ctl_fd is open. |
2023 | */ | |
19958708 | 2024 | |
c3f6f71d JM |
2025 | if (pi->tid != 0) |
2026 | pi = find_procinfo_or_die (pi->pid, 0); | |
2027 | ||
2028 | if (!pi->status_valid) | |
2029 | if (!proc_get_status (pi)) | |
2030 | return NULL; | |
2031 | ||
2032 | #ifdef NEW_PROC_API | |
2033 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2034 | #else | |
2035 | ret = &pi->prstatus.pr_sigpend; | |
2036 | #endif | |
2037 | if (save && ret) | |
37de36c6 | 2038 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2039 | |
c3f6f71d JM |
2040 | return ret; |
2041 | } | |
c906108c | 2042 | |
c3f6f71d JM |
2043 | /* |
2044 | * Function: proc_get_signal_actions | |
2045 | * | |
2046 | * returns the set of signal actions. | |
2047 | * Will also copy the sigactionset if 'save' is non-zero. | |
2048 | */ | |
c906108c | 2049 | |
37de36c6 KB |
2050 | gdb_sigaction_t * |
2051 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2052 | { |
37de36c6 | 2053 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2054 | |
2055 | /* | |
2056 | * We should never have to apply this operation to any procinfo | |
2057 | * except the one for the main process. If that ever changes | |
19958708 | 2058 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2059 | * replace it with one that makes sure the ctl_fd is open. |
2060 | */ | |
19958708 | 2061 | |
c3f6f71d JM |
2062 | if (pi->tid != 0) |
2063 | pi = find_procinfo_or_die (pi->pid, 0); | |
2064 | ||
2065 | if (!pi->status_valid) | |
2066 | if (!proc_get_status (pi)) | |
2067 | return NULL; | |
2068 | ||
2069 | #ifdef NEW_PROC_API | |
2070 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2071 | #else | |
2072 | ret = &pi->prstatus.pr_action; | |
2073 | #endif | |
2074 | if (save && ret) | |
37de36c6 | 2075 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2076 | |
c3f6f71d JM |
2077 | return ret; |
2078 | } | |
c5aa993b | 2079 | |
c3f6f71d JM |
2080 | /* |
2081 | * Function: proc_get_held_signals | |
2082 | * | |
2083 | * returns the set of signals that are held / blocked. | |
2084 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2085 | */ |
2086 | ||
37de36c6 KB |
2087 | gdb_sigset_t * |
2088 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2089 | { |
37de36c6 | 2090 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2091 | |
2092 | /* | |
2093 | * We should never have to apply this operation to any procinfo | |
2094 | * except the one for the main process. If that ever changes | |
19958708 | 2095 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2096 | * replace it with one that makes sure the ctl_fd is open. |
2097 | */ | |
19958708 | 2098 | |
c3f6f71d JM |
2099 | if (pi->tid != 0) |
2100 | pi = find_procinfo_or_die (pi->pid, 0); | |
2101 | ||
2102 | #ifdef NEW_PROC_API | |
2103 | if (!pi->status_valid) | |
2104 | if (!proc_get_status (pi)) | |
2105 | return NULL; | |
2106 | ||
2107 | #ifdef UNIXWARE | |
2108 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2109 | #else |
c3f6f71d JM |
2110 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2111 | #endif /* UNIXWARE */ | |
2112 | #else /* not NEW_PROC_API */ | |
2113 | { | |
37de36c6 | 2114 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2115 | |
2116 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2117 | ret = &sigheld; | |
2118 | } | |
2119 | #endif /* NEW_PROC_API */ | |
2120 | if (save && ret) | |
37de36c6 | 2121 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2122 | |
2123 | return ret; | |
c906108c SS |
2124 | } |
2125 | ||
c3f6f71d JM |
2126 | /* |
2127 | * Function: proc_get_traced_signals | |
2128 | * | |
2129 | * returns the set of signals that are traced / debugged. | |
2130 | * Will also copy the sigset if 'save' is non-zero. | |
2131 | */ | |
2132 | ||
37de36c6 KB |
2133 | gdb_sigset_t * |
2134 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2135 | { |
37de36c6 | 2136 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2137 | |
2138 | /* | |
2139 | * We should never have to apply this operation to any procinfo | |
2140 | * except the one for the main process. If that ever changes | |
19958708 | 2141 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2142 | * replace it with one that makes sure the ctl_fd is open. |
2143 | */ | |
19958708 | 2144 | |
c3f6f71d JM |
2145 | if (pi->tid != 0) |
2146 | pi = find_procinfo_or_die (pi->pid, 0); | |
2147 | ||
2148 | #ifdef NEW_PROC_API | |
2149 | if (!pi->status_valid) | |
2150 | if (!proc_get_status (pi)) | |
2151 | return NULL; | |
2152 | ||
2153 | ret = &pi->prstatus.pr_sigtrace; | |
2154 | #else | |
2155 | { | |
37de36c6 | 2156 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2157 | |
2158 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2159 | ret = &sigtrace; | |
2160 | } | |
c906108c | 2161 | #endif |
c3f6f71d | 2162 | if (save && ret) |
37de36c6 | 2163 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2164 | |
c3f6f71d JM |
2165 | return ret; |
2166 | } | |
c906108c | 2167 | |
c3f6f71d JM |
2168 | /* |
2169 | * Function: proc_trace_signal | |
2170 | * | |
2171 | * Add 'signo' to the set of signals that are traced. | |
2172 | * Returns non-zero for success, zero for failure. | |
2173 | */ | |
c906108c | 2174 | |
c3f6f71d | 2175 | int |
fba45db2 | 2176 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2177 | { |
37de36c6 | 2178 | gdb_sigset_t temp; |
c3f6f71d JM |
2179 | |
2180 | /* | |
2181 | * We should never have to apply this operation to any procinfo | |
2182 | * except the one for the main process. If that ever changes | |
19958708 | 2183 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2184 | * replace it with one that makes sure the ctl_fd is open. |
2185 | */ | |
19958708 | 2186 | |
c3f6f71d JM |
2187 | if (pi->tid != 0) |
2188 | pi = find_procinfo_or_die (pi->pid, 0); | |
2189 | ||
2190 | if (pi) | |
c906108c | 2191 | { |
c3f6f71d | 2192 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2193 | { |
c3f6f71d JM |
2194 | praddset (&temp, signo); |
2195 | return proc_set_traced_signals (pi, &temp); | |
c906108c SS |
2196 | } |
2197 | } | |
c5aa993b | 2198 | |
c3f6f71d JM |
2199 | return 0; /* failure */ |
2200 | } | |
c906108c | 2201 | |
c3f6f71d JM |
2202 | /* |
2203 | * Function: proc_ignore_signal | |
2204 | * | |
2205 | * Remove 'signo' from the set of signals that are traced. | |
2206 | * Returns non-zero for success, zero for failure. | |
2207 | */ | |
c906108c | 2208 | |
c3f6f71d | 2209 | int |
fba45db2 | 2210 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2211 | { |
37de36c6 | 2212 | gdb_sigset_t temp; |
c3f6f71d JM |
2213 | |
2214 | /* | |
2215 | * We should never have to apply this operation to any procinfo | |
2216 | * except the one for the main process. If that ever changes | |
19958708 | 2217 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2218 | * replace it with one that makes sure the ctl_fd is open. |
2219 | */ | |
19958708 | 2220 | |
c3f6f71d JM |
2221 | if (pi->tid != 0) |
2222 | pi = find_procinfo_or_die (pi->pid, 0); | |
2223 | ||
2224 | if (pi) | |
c906108c | 2225 | { |
c3f6f71d | 2226 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2227 | { |
c3f6f71d JM |
2228 | prdelset (&temp, signo); |
2229 | return proc_set_traced_signals (pi, &temp); | |
c906108c | 2230 | } |
c906108c | 2231 | } |
c906108c | 2232 | |
c3f6f71d | 2233 | return 0; /* failure */ |
c906108c SS |
2234 | } |
2235 | ||
2236 | /* | |
c3f6f71d JM |
2237 | * Function: proc_get_traced_faults |
2238 | * | |
2239 | * returns the set of hardware faults that are traced /debugged. | |
2240 | * Will also copy the faultset if 'save' is non-zero. | |
2241 | */ | |
2242 | ||
2243 | fltset_t * | |
fba45db2 | 2244 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2245 | { |
2246 | fltset_t *ret = NULL; | |
2247 | ||
2248 | /* | |
2249 | * We should never have to apply this operation to any procinfo | |
2250 | * except the one for the main process. If that ever changes | |
19958708 | 2251 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2252 | * replace it with one that makes sure the ctl_fd is open. |
2253 | */ | |
19958708 | 2254 | |
c3f6f71d JM |
2255 | if (pi->tid != 0) |
2256 | pi = find_procinfo_or_die (pi->pid, 0); | |
2257 | ||
2258 | #ifdef NEW_PROC_API | |
2259 | if (!pi->status_valid) | |
2260 | if (!proc_get_status (pi)) | |
2261 | return NULL; | |
2262 | ||
2263 | ret = &pi->prstatus.pr_flttrace; | |
2264 | #else | |
2265 | { | |
2266 | static fltset_t flttrace; | |
2267 | ||
2268 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2269 | ret = &flttrace; | |
2270 | } | |
2271 | #endif | |
2272 | if (save && ret) | |
2273 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2274 | |
c3f6f71d JM |
2275 | return ret; |
2276 | } | |
c906108c | 2277 | |
c3f6f71d JM |
2278 | /* |
2279 | * Function: proc_get_traced_sysentry | |
2280 | * | |
2281 | * returns the set of syscalls that are traced /debugged on entry. | |
2282 | * Will also copy the syscall set if 'save' is non-zero. | |
2283 | */ | |
c906108c | 2284 | |
c3f6f71d | 2285 | sysset_t * |
fba45db2 | 2286 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2287 | { |
2288 | sysset_t *ret = NULL; | |
2289 | ||
2290 | /* | |
2291 | * We should never have to apply this operation to any procinfo | |
2292 | * except the one for the main process. If that ever changes | |
19958708 | 2293 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2294 | * replace it with one that makes sure the ctl_fd is open. |
2295 | */ | |
19958708 | 2296 | |
c3f6f71d JM |
2297 | if (pi->tid != 0) |
2298 | pi = find_procinfo_or_die (pi->pid, 0); | |
2299 | ||
2300 | #ifdef NEW_PROC_API | |
2301 | if (!pi->status_valid) | |
2302 | if (!proc_get_status (pi)) | |
2303 | return NULL; | |
2304 | ||
37de36c6 | 2305 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2306 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2307 | #else /* DYNAMIC_SYSCALLS */ |
2308 | { | |
2309 | static sysset_t *sysentry; | |
2310 | size_t size; | |
2311 | ||
2312 | if (!sysentry) | |
2313 | sysentry = sysset_t_alloc (pi); | |
2314 | ret = sysentry; | |
2315 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2316 | return NULL; | |
2317 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2318 | { | |
2319 | gdb_premptysysset (sysentry); | |
2320 | } | |
2321 | else | |
2322 | { | |
2323 | int rsize; | |
2324 | ||
2325 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2326 | SEEK_SET) | |
2327 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2328 | return NULL; | |
2329 | size = sysset_t_size (pi); | |
2330 | gdb_premptysysset (sysentry); | |
2331 | rsize = read (pi->status_fd, sysentry, size); | |
2332 | if (rsize < 0) | |
2333 | return NULL; | |
2334 | } | |
2335 | } | |
2336 | #endif /* DYNAMIC_SYSCALLS */ | |
2337 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2338 | { |
2339 | static sysset_t sysentry; | |
c906108c | 2340 | |
c3f6f71d JM |
2341 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2342 | ret = &sysentry; | |
2343 | } | |
37de36c6 | 2344 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2345 | if (save && ret) |
37de36c6 | 2346 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2347 | |
c3f6f71d JM |
2348 | return ret; |
2349 | } | |
c5aa993b | 2350 | |
c3f6f71d JM |
2351 | /* |
2352 | * Function: proc_get_traced_sysexit | |
2353 | * | |
2354 | * returns the set of syscalls that are traced /debugged on exit. | |
2355 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2356 | */ |
2357 | ||
c3f6f71d | 2358 | sysset_t * |
fba45db2 | 2359 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2360 | { |
c3f6f71d JM |
2361 | sysset_t * ret = NULL; |
2362 | ||
2363 | /* | |
2364 | * We should never have to apply this operation to any procinfo | |
2365 | * except the one for the main process. If that ever changes | |
19958708 | 2366 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2367 | * replace it with one that makes sure the ctl_fd is open. |
2368 | */ | |
19958708 | 2369 | |
c3f6f71d JM |
2370 | if (pi->tid != 0) |
2371 | pi = find_procinfo_or_die (pi->pid, 0); | |
2372 | ||
2373 | #ifdef NEW_PROC_API | |
2374 | if (!pi->status_valid) | |
2375 | if (!proc_get_status (pi)) | |
2376 | return NULL; | |
2377 | ||
37de36c6 | 2378 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2379 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2380 | #else /* DYNAMIC_SYSCALLS */ |
2381 | { | |
2382 | static sysset_t *sysexit; | |
2383 | size_t size; | |
2384 | ||
2385 | if (!sysexit) | |
2386 | sysexit = sysset_t_alloc (pi); | |
2387 | ret = sysexit; | |
2388 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2389 | return NULL; | |
2390 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2391 | { | |
2392 | gdb_premptysysset (sysexit); | |
2393 | } | |
2394 | else | |
2395 | { | |
2396 | int rsize; | |
2397 | ||
2398 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2399 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2400 | return NULL; | |
2401 | size = sysset_t_size (pi); | |
2402 | gdb_premptysysset (sysexit); | |
2403 | rsize = read (pi->status_fd, sysexit, size); | |
2404 | if (rsize < 0) | |
2405 | return NULL; | |
2406 | } | |
2407 | } | |
2408 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2409 | #else |
2410 | { | |
2411 | static sysset_t sysexit; | |
c5aa993b | 2412 | |
c3f6f71d JM |
2413 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2414 | ret = &sysexit; | |
2415 | } | |
2416 | #endif | |
2417 | if (save && ret) | |
37de36c6 | 2418 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2419 | |
2420 | return ret; | |
2421 | } | |
c906108c | 2422 | |
c3f6f71d JM |
2423 | /* |
2424 | * Function: proc_clear_current_fault | |
2425 | * | |
2426 | * The current fault (if any) is cleared; the associated signal | |
2427 | * will not be sent to the process or LWP when it resumes. | |
2428 | * Returns non-zero for success, zero for failure. | |
2429 | */ | |
c906108c | 2430 | |
c3f6f71d | 2431 | int |
fba45db2 | 2432 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2433 | { |
2434 | int win; | |
2435 | ||
2436 | /* | |
2437 | * We should never have to apply this operation to any procinfo | |
2438 | * except the one for the main process. If that ever changes | |
19958708 | 2439 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2440 | * replace it with one that makes sure the ctl_fd is open. |
2441 | */ | |
19958708 | 2442 | |
c3f6f71d JM |
2443 | if (pi->tid != 0) |
2444 | pi = find_procinfo_or_die (pi->pid, 0); | |
2445 | ||
2446 | #ifdef NEW_PROC_API | |
2447 | { | |
37de36c6 | 2448 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2449 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2450 | } | |
2451 | #else | |
2452 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2453 | #endif | |
2454 | ||
2455 | return win; | |
c906108c SS |
2456 | } |
2457 | ||
2458 | /* | |
c3f6f71d JM |
2459 | * Function: proc_set_current_signal |
2460 | * | |
2461 | * Set the "current signal" that will be delivered next to the process. | |
2462 | * NOTE: semantics are different from those of KILL. | |
2463 | * This signal will be delivered to the process or LWP | |
2464 | * immediately when it is resumed (even if the signal is held/blocked); | |
2465 | * it will NOT immediately cause another event of interest, and will NOT | |
2466 | * first trap back to the debugger. | |
2467 | * | |
2468 | * Returns non-zero for success, zero for failure. | |
2469 | */ | |
2470 | ||
2471 | int | |
fba45db2 | 2472 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2473 | { |
2474 | int win; | |
2475 | struct { | |
37de36c6 | 2476 | procfs_ctl_t cmd; |
c3f6f71d | 2477 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2478 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2479 | } arg; |
37de36c6 | 2480 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2481 | |
2482 | /* | |
2483 | * We should never have to apply this operation to any procinfo | |
2484 | * except the one for the main process. If that ever changes | |
19958708 | 2485 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2486 | * replace it with one that makes sure the ctl_fd is open. |
2487 | */ | |
19958708 | 2488 | |
c3f6f71d JM |
2489 | if (pi->tid != 0) |
2490 | pi = find_procinfo_or_die (pi->pid, 0); | |
2491 | ||
2492 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2493 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2494 | * receives a PIOCSSIG with a signal identical to the current signal, | |
19958708 | 2495 | * it messes up the current signal. Work around the kernel bug. |
c3f6f71d JM |
2496 | */ |
2497 | if (signo > 0 && | |
2498 | signo == proc_cursig (pi)) | |
2499 | return 1; /* I assume this is a success? */ | |
2500 | #endif | |
2501 | ||
2502 | /* The pointer is just a type alias. */ | |
37de36c6 | 2503 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2504 | mysinfo->si_signo = signo; |
2505 | mysinfo->si_code = 0; | |
2506 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2507 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2508 | ||
2509 | #ifdef NEW_PROC_API | |
2510 | arg.cmd = PCSSIG; | |
2511 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2512 | #else | |
2513 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2514 | #endif | |
c906108c | 2515 | |
c3f6f71d JM |
2516 | return win; |
2517 | } | |
c906108c | 2518 | |
c3f6f71d JM |
2519 | /* |
2520 | * Function: proc_clear_current_signal | |
2521 | * | |
2522 | * The current signal (if any) is cleared, and | |
2523 | * is not sent to the process or LWP when it resumes. | |
2524 | * Returns non-zero for success, zero for failure. | |
2525 | */ | |
c906108c | 2526 | |
c3f6f71d | 2527 | int |
fba45db2 | 2528 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2529 | { |
2530 | int win; | |
2531 | ||
2532 | /* | |
2533 | * We should never have to apply this operation to any procinfo | |
2534 | * except the one for the main process. If that ever changes | |
19958708 | 2535 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2536 | * replace it with one that makes sure the ctl_fd is open. |
2537 | */ | |
19958708 | 2538 | |
c3f6f71d JM |
2539 | if (pi->tid != 0) |
2540 | pi = find_procinfo_or_die (pi->pid, 0); | |
2541 | ||
2542 | #ifdef NEW_PROC_API | |
2543 | { | |
2544 | struct { | |
37de36c6 | 2545 | procfs_ctl_t cmd; |
c3f6f71d | 2546 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2547 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2548 | } arg; |
37de36c6 | 2549 | gdb_siginfo_t *mysinfo; |
c3f6f71d JM |
2550 | |
2551 | arg.cmd = PCSSIG; | |
2552 | /* The pointer is just a type alias. */ | |
37de36c6 | 2553 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
c3f6f71d JM |
2554 | mysinfo->si_signo = 0; |
2555 | mysinfo->si_code = 0; | |
2556 | mysinfo->si_errno = 0; | |
2557 | mysinfo->si_pid = getpid (); /* ?why? */ | |
2558 | mysinfo->si_uid = getuid (); /* ?why? */ | |
2559 | ||
2560 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2561 | } | |
2562 | #else | |
2563 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2564 | #endif | |
c906108c | 2565 | |
c3f6f71d JM |
2566 | return win; |
2567 | } | |
c906108c | 2568 | |
c3f6f71d JM |
2569 | /* |
2570 | * Function: proc_get_gregs | |
2571 | * | |
2572 | * Get the general registers for the process or LWP. | |
2573 | * Returns non-zero for success, zero for failure. | |
2574 | */ | |
c906108c | 2575 | |
c3f6f71d | 2576 | gdb_gregset_t * |
fba45db2 | 2577 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2578 | { |
2579 | if (!pi->status_valid || !pi->gregs_valid) | |
2580 | if (!proc_get_status (pi)) | |
2581 | return NULL; | |
2582 | ||
2583 | /* | |
2584 | * OK, sorry about the ifdef's. | |
19958708 | 2585 | * There's three cases instead of two, because |
c3f6f71d JM |
2586 | * in this instance Unixware and Solaris/RW differ. |
2587 | */ | |
2588 | ||
2589 | #ifdef NEW_PROC_API | |
2590 | #ifdef UNIXWARE /* ugh, a true architecture dependency */ | |
2591 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; | |
2592 | #else /* not Unixware */ | |
2593 | return &pi->prstatus.pr_lwp.pr_reg; | |
2594 | #endif /* Unixware */ | |
2595 | #else /* not NEW_PROC_API */ | |
2596 | return &pi->prstatus.pr_reg; | |
2597 | #endif /* NEW_PROC_API */ | |
2598 | } | |
c5aa993b | 2599 | |
c3f6f71d JM |
2600 | /* |
2601 | * Function: proc_get_fpregs | |
2602 | * | |
2603 | * Get the floating point registers for the process or LWP. | |
2604 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
2605 | */ |
2606 | ||
c3f6f71d | 2607 | gdb_fpregset_t * |
fba45db2 | 2608 | proc_get_fpregs (procinfo *pi) |
c906108c | 2609 | { |
c3f6f71d JM |
2610 | #ifdef NEW_PROC_API |
2611 | if (!pi->status_valid || !pi->fpregs_valid) | |
2612 | if (!proc_get_status (pi)) | |
2613 | return NULL; | |
2614 | ||
2615 | #ifdef UNIXWARE /* a true architecture dependency */ | |
2616 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; | |
2617 | #else | |
2618 | return &pi->prstatus.pr_lwp.pr_fpreg; | |
2619 | #endif /* Unixware */ | |
c5aa993b | 2620 | |
c3f6f71d JM |
2621 | #else /* not NEW_PROC_API */ |
2622 | if (pi->fpregs_valid) | |
2623 | return &pi->fpregset; /* already got 'em */ | |
2624 | else | |
c906108c | 2625 | { |
c3f6f71d JM |
2626 | if (pi->ctl_fd == 0 && |
2627 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2628 | { |
c3f6f71d | 2629 | return NULL; |
c906108c | 2630 | } |
c3f6f71d | 2631 | else |
c906108c | 2632 | { |
c3f6f71d JM |
2633 | #ifdef PIOCTGFPREG |
2634 | struct { | |
2635 | long pr_count; | |
2636 | tid_t pr_error_thread; | |
2637 | tfpregset_t thread_1; | |
2638 | } thread_fpregs; | |
2639 | ||
2640 | thread_fpregs.pr_count = 1; | |
2641 | thread_fpregs.thread_1.tid = pi->tid; | |
2642 | ||
2643 | if (pi->tid == 0 && | |
2644 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2645 | { | |
2646 | pi->fpregs_valid = 1; | |
2647 | return &pi->fpregset; /* got 'em now! */ | |
2648 | } | |
2649 | else if (pi->tid != 0 && | |
2650 | ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
2651 | { | |
2652 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2653 | sizeof (pi->fpregset)); | |
2654 | pi->fpregs_valid = 1; | |
2655 | return &pi->fpregset; /* got 'em now! */ | |
2656 | } | |
2657 | else | |
2658 | { | |
2659 | return NULL; | |
2660 | } | |
2661 | #else | |
2662 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
2663 | { | |
2664 | pi->fpregs_valid = 1; | |
2665 | return &pi->fpregset; /* got 'em now! */ | |
2666 | } | |
2667 | else | |
2668 | { | |
2669 | return NULL; | |
2670 | } | |
2671 | #endif | |
c906108c | 2672 | } |
c906108c | 2673 | } |
c3f6f71d | 2674 | #endif |
c906108c SS |
2675 | } |
2676 | ||
c3f6f71d JM |
2677 | /* |
2678 | * Function: proc_set_gregs | |
2679 | * | |
2680 | * Write the general registers back to the process or LWP. | |
2681 | * Returns non-zero for success, zero for failure. | |
2682 | */ | |
2683 | ||
2684 | int | |
fba45db2 | 2685 | proc_set_gregs (procinfo *pi) |
c906108c | 2686 | { |
c3f6f71d JM |
2687 | gdb_gregset_t *gregs; |
2688 | int win; | |
c5aa993b | 2689 | |
c3f6f71d JM |
2690 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2691 | return 0; /* get_regs has already warned */ | |
2692 | ||
2693 | if (pi->ctl_fd == 0 && | |
2694 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2695 | { |
c3f6f71d | 2696 | return 0; |
c906108c | 2697 | } |
c3f6f71d | 2698 | else |
c906108c | 2699 | { |
c3f6f71d JM |
2700 | #ifdef NEW_PROC_API |
2701 | struct { | |
37de36c6 | 2702 | procfs_ctl_t cmd; |
c3f6f71d JM |
2703 | /* Use char array to avoid alignment issues. */ |
2704 | char gregs[sizeof (gdb_gregset_t)]; | |
2705 | } arg; | |
2706 | ||
2707 | arg.cmd = PCSREG; | |
2708 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); | |
2709 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2710 | #else | |
2711 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2712 | #endif | |
c906108c | 2713 | } |
c3f6f71d JM |
2714 | |
2715 | /* Policy: writing the regs invalidates our cache. */ | |
2716 | pi->gregs_valid = 0; | |
2717 | return win; | |
c906108c SS |
2718 | } |
2719 | ||
c3f6f71d JM |
2720 | /* |
2721 | * Function: proc_set_fpregs | |
2722 | * | |
2723 | * Modify the floating point register set of the process or LWP. | |
2724 | * Returns non-zero for success, zero for failure. | |
2725 | */ | |
2726 | ||
2727 | int | |
fba45db2 | 2728 | proc_set_fpregs (procinfo *pi) |
c906108c | 2729 | { |
c3f6f71d JM |
2730 | gdb_fpregset_t *fpregs; |
2731 | int win; | |
2732 | ||
2733 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
2734 | return 0; /* get_fpregs has already warned */ | |
c5aa993b | 2735 | |
c3f6f71d JM |
2736 | if (pi->ctl_fd == 0 && |
2737 | open_procinfo_files (pi, FD_CTL) == 0) | |
c906108c | 2738 | { |
c3f6f71d | 2739 | return 0; |
c906108c | 2740 | } |
c3f6f71d | 2741 | else |
c906108c | 2742 | { |
c3f6f71d JM |
2743 | #ifdef NEW_PROC_API |
2744 | struct { | |
37de36c6 | 2745 | procfs_ctl_t cmd; |
c3f6f71d JM |
2746 | /* Use char array to avoid alignment issues. */ |
2747 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2748 | } arg; | |
2749 | ||
2750 | arg.cmd = PCSFPREG; | |
2751 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); | |
2752 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2753 | #else | |
2754 | #ifdef PIOCTSFPREG | |
2755 | if (pi->tid == 0) | |
2756 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2757 | else | |
2758 | { | |
2759 | struct { | |
2760 | long pr_count; | |
2761 | tid_t pr_error_thread; | |
2762 | tfpregset_t thread_1; | |
2763 | } thread_fpregs; | |
2764 | ||
2765 | thread_fpregs.pr_count = 1; | |
2766 | thread_fpregs.thread_1.tid = pi->tid; | |
2767 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2768 | sizeof (*fpregs)); | |
2769 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2770 | } | |
2771 | #else | |
2772 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2773 | #endif /* osf PIOCTSFPREG */ | |
2774 | #endif /* NEW_PROC_API */ | |
c906108c | 2775 | } |
c3f6f71d JM |
2776 | |
2777 | /* Policy: writing the regs invalidates our cache. */ | |
2778 | pi->fpregs_valid = 0; | |
2779 | return win; | |
c906108c SS |
2780 | } |
2781 | ||
2782 | /* | |
c3f6f71d JM |
2783 | * Function: proc_kill |
2784 | * | |
2785 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2786 | * Returns non-zero for success, zero for failure. | |
2787 | */ | |
c906108c | 2788 | |
c3f6f71d | 2789 | int |
fba45db2 | 2790 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2791 | { |
2792 | int win; | |
c906108c | 2793 | |
c3f6f71d JM |
2794 | /* |
2795 | * We might conceivably apply this operation to an LWP, and | |
2796 | * the LWP's ctl file descriptor might not be open. | |
2797 | */ | |
c906108c | 2798 | |
c3f6f71d JM |
2799 | if (pi->ctl_fd == 0 && |
2800 | open_procinfo_files (pi, FD_CTL) == 0) | |
2801 | { | |
2802 | return 0; | |
2803 | } | |
2804 | else | |
2805 | { | |
2806 | #ifdef NEW_PROC_API | |
37de36c6 | 2807 | procfs_ctl_t cmd[2]; |
c906108c | 2808 | |
c3f6f71d JM |
2809 | cmd[0] = PCKILL; |
2810 | cmd[1] = signo; | |
2811 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2812 | #else /* ioctl method */ | |
2813 | /* FIXME: do I need the Alpha OSF fixups present in | |
2814 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2815 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2816 | #endif | |
2817 | } | |
c906108c | 2818 | |
c3f6f71d JM |
2819 | return win; |
2820 | } | |
c906108c | 2821 | |
c3f6f71d JM |
2822 | /* |
2823 | * Function: proc_parent_pid | |
2824 | * | |
2825 | * Find the pid of the process that started this one. | |
2826 | * Returns the parent process pid, or zero. | |
c906108c SS |
2827 | */ |
2828 | ||
c3f6f71d | 2829 | int |
fba45db2 | 2830 | proc_parent_pid (procinfo *pi) |
c906108c | 2831 | { |
c3f6f71d JM |
2832 | /* |
2833 | * We should never have to apply this operation to any procinfo | |
2834 | * except the one for the main process. If that ever changes | |
19958708 | 2835 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2836 | * replace it with one that makes sure the ctl_fd is open. |
2837 | */ | |
19958708 | 2838 | |
c3f6f71d JM |
2839 | if (pi->tid != 0) |
2840 | pi = find_procinfo_or_die (pi->pid, 0); | |
2841 | ||
2842 | if (!pi->status_valid) | |
2843 | if (!proc_get_status (pi)) | |
2844 | return 0; | |
c5aa993b | 2845 | |
c3f6f71d JM |
2846 | return pi->prstatus.pr_ppid; |
2847 | } | |
2848 | ||
2849 | ||
9a043c1d AC |
2850 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2851 | (a.k.a void pointer)! */ | |
2852 | ||
2853 | static void * | |
2854 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2855 | { | |
2856 | void *ptr; | |
2857 | ||
2858 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr)); | |
2859 | ADDRESS_TO_POINTER (builtin_type_void_data_ptr, &ptr, addr); | |
2860 | return ptr; | |
2861 | } | |
2862 | ||
c3f6f71d JM |
2863 | /* |
2864 | * Function: proc_set_watchpoint | |
2865 | * | |
2866 | */ | |
2867 | ||
2868 | int | |
fba45db2 | 2869 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2870 | { |
19958708 | 2871 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) |
c3f6f71d JM |
2872 | return 0; |
2873 | #else | |
2874 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2875 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2876 | return 0; | |
2877 | #else | |
2878 | struct { | |
37de36c6 | 2879 | procfs_ctl_t cmd; |
c3f6f71d JM |
2880 | char watch[sizeof (prwatch_t)]; |
2881 | } arg; | |
2882 | prwatch_t *pwatch; | |
2883 | ||
2884 | pwatch = (prwatch_t *) &arg.watch; | |
9a043c1d AC |
2885 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2886 | convert a target address into something that can be stored in a | |
2887 | native data structure. */ | |
831e682e | 2888 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
9a043c1d | 2889 | pwatch->pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2890 | #else |
9a043c1d | 2891 | pwatch->pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2892 | #endif |
c3f6f71d JM |
2893 | pwatch->pr_size = len; |
2894 | pwatch->pr_wflags = wflags; | |
2895 | #if defined(NEW_PROC_API) && defined (PCWATCH) | |
2896 | arg.cmd = PCWATCH; | |
2897 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); | |
2898 | #else | |
2899 | #if defined (PIOCSWATCH) | |
2900 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); | |
2901 | #else | |
2902 | return 0; /* Fail */ | |
2903 | #endif | |
2904 | #endif | |
2905 | #endif | |
2906 | #endif | |
c906108c SS |
2907 | } |
2908 | ||
c3f6f71d | 2909 | #ifdef TM_I386SOL2_H /* Is it hokey to use this? */ |
c906108c | 2910 | |
c3f6f71d | 2911 | #include <sys/sysi86.h> |
c906108c | 2912 | |
c3f6f71d JM |
2913 | /* |
2914 | * Function: proc_get_LDT_entry | |
2915 | * | |
2916 | * Inputs: | |
2917 | * procinfo *pi; | |
2918 | * int key; | |
2919 | * | |
2920 | * The 'key' is actually the value of the lower 16 bits of | |
2921 | * the GS register for the LWP that we're interested in. | |
2922 | * | |
2923 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2924 | */ |
2925 | ||
c3f6f71d | 2926 | struct ssd * |
fba45db2 | 2927 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2928 | { |
c3f6f71d JM |
2929 | static struct ssd *ldt_entry = NULL; |
2930 | #ifdef NEW_PROC_API | |
2931 | char pathname[MAX_PROC_NAME_SIZE]; | |
2932 | struct cleanup *old_chain = NULL; | |
2933 | int fd; | |
2934 | ||
2935 | /* Allocate space for one LDT entry. | |
2936 | This alloc must persist, because we return a pointer to it. */ | |
2937 | if (ldt_entry == NULL) | |
2938 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2939 | ||
2940 | /* Open the file descriptor for the LDT table. */ | |
2941 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2942 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2943 | { |
c3f6f71d JM |
2944 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2945 | return NULL; | |
c906108c | 2946 | } |
c3f6f71d | 2947 | /* Make sure it gets closed again! */ |
004527cb | 2948 | old_chain = make_cleanup_close (fd); |
c906108c | 2949 | |
c3f6f71d JM |
2950 | /* Now 'read' thru the table, find a match and return it. */ |
2951 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2952 | { |
c3f6f71d JM |
2953 | if (ldt_entry->sel == 0 && |
2954 | ldt_entry->bo == 0 && | |
2955 | ldt_entry->acc1 == 0 && | |
2956 | ldt_entry->acc2 == 0) | |
2957 | break; /* end of table */ | |
2958 | /* If key matches, return this entry. */ | |
2959 | if (ldt_entry->sel == key) | |
2960 | return ldt_entry; | |
c906108c | 2961 | } |
c3f6f71d JM |
2962 | /* Loop ended, match not found. */ |
2963 | return NULL; | |
2964 | #else | |
2965 | int nldt, i; | |
2966 | static int nalloc = 0; | |
c906108c | 2967 | |
c3f6f71d JM |
2968 | /* Get the number of LDT entries. */ |
2969 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2970 | { |
c3f6f71d JM |
2971 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2972 | return NULL; | |
c906108c SS |
2973 | } |
2974 | ||
c3f6f71d JM |
2975 | /* Allocate space for the number of LDT entries. */ |
2976 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2977 | if (nldt > nalloc) | |
c906108c | 2978 | { |
19958708 | 2979 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2980 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2981 | nalloc = nldt; | |
2982 | } | |
19958708 | 2983 | |
c3f6f71d JM |
2984 | /* Read the whole table in one gulp. */ |
2985 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2986 | { | |
2987 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2988 | return NULL; | |
c906108c SS |
2989 | } |
2990 | ||
c3f6f71d JM |
2991 | /* Search the table and return the (first) entry matching 'key'. */ |
2992 | for (i = 0; i < nldt; i++) | |
2993 | if (ldt_entry[i].sel == key) | |
2994 | return &ldt_entry[i]; | |
c906108c | 2995 | |
c3f6f71d JM |
2996 | /* Loop ended, match not found. */ |
2997 | return NULL; | |
2998 | #endif | |
2999 | } | |
c906108c | 3000 | |
c3f6f71d | 3001 | #endif /* TM_I386SOL2_H */ |
c906108c | 3002 | |
c3f6f71d | 3003 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 3004 | |
c3f6f71d | 3005 | /* =================== Thread "MODULE" =================== */ |
c906108c | 3006 | |
c3f6f71d JM |
3007 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
3008 | since there is a different way to do threads on every OS. */ | |
c906108c | 3009 | |
c3f6f71d | 3010 | /* |
19958708 | 3011 | * Function: proc_get_nthreads |
c3f6f71d | 3012 | * |
19958708 | 3013 | * Return the number of threads for the process |
c3f6f71d | 3014 | */ |
c906108c | 3015 | |
c3f6f71d JM |
3016 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
3017 | /* | |
3018 | * OSF version | |
3019 | */ | |
19958708 | 3020 | int |
fba45db2 | 3021 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
3022 | { |
3023 | int nthreads = 0; | |
c906108c | 3024 | |
c3f6f71d JM |
3025 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3026 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3027 | |
c3f6f71d | 3028 | return nthreads; |
c906108c SS |
3029 | } |
3030 | ||
c3f6f71d JM |
3031 | #else |
3032 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3033 | /* | |
3034 | * Solaris and Unixware version | |
3035 | */ | |
3036 | int | |
fba45db2 | 3037 | proc_get_nthreads (procinfo *pi) |
c906108c | 3038 | { |
c3f6f71d JM |
3039 | if (!pi->status_valid) |
3040 | if (!proc_get_status (pi)) | |
3041 | return 0; | |
c5aa993b | 3042 | |
c3f6f71d | 3043 | /* |
19958708 | 3044 | * NEW_PROC_API: only works for the process procinfo, |
c3f6f71d JM |
3045 | * because the LWP procinfos do not get prstatus filled in. |
3046 | */ | |
19958708 | 3047 | #ifdef NEW_PROC_API |
c3f6f71d JM |
3048 | if (pi->tid != 0) /* find the parent process procinfo */ |
3049 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3050 | #endif |
c3f6f71d | 3051 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3052 | } |
3053 | ||
c3f6f71d JM |
3054 | #else |
3055 | /* | |
3056 | * Default version | |
3057 | */ | |
3058 | int | |
fba45db2 | 3059 | proc_get_nthreads (procinfo *pi) |
c906108c | 3060 | { |
c3f6f71d JM |
3061 | return 0; |
3062 | } | |
3063 | #endif | |
3064 | #endif | |
3065 | ||
3066 | /* | |
3067 | * Function: proc_get_current_thread (LWP version) | |
3068 | * | |
3069 | * Return the ID of the thread that had an event of interest. | |
3070 | * (ie. the one that hit a breakpoint or other traced event). | |
3071 | * All other things being equal, this should be the ID of a | |
3072 | * thread that is currently executing. | |
3073 | */ | |
3074 | ||
3075 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3076 | /* | |
3077 | * Solaris and Unixware version | |
3078 | */ | |
3079 | int | |
fba45db2 | 3080 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3081 | { |
3082 | /* | |
3083 | * Note: this should be applied to the root procinfo for the process, | |
3084 | * not to the procinfo for an LWP. If applied to the procinfo for | |
19958708 | 3085 | * an LWP, it will simply return that LWP's ID. In that case, |
c3f6f71d JM |
3086 | * find the parent process procinfo. |
3087 | */ | |
19958708 | 3088 | |
c3f6f71d JM |
3089 | if (pi->tid != 0) |
3090 | pi = find_procinfo_or_die (pi->pid, 0); | |
3091 | ||
3092 | if (!pi->status_valid) | |
3093 | if (!proc_get_status (pi)) | |
3094 | return 0; | |
3095 | ||
3096 | #ifdef NEW_PROC_API | |
3097 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3098 | #else |
c3f6f71d | 3099 | return pi->prstatus.pr_who; |
c906108c | 3100 | #endif |
c3f6f71d | 3101 | } |
c906108c | 3102 | |
c3f6f71d JM |
3103 | #else |
3104 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3105 | /* | |
3106 | * OSF version | |
3107 | */ | |
19958708 | 3108 | int |
fba45db2 | 3109 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3110 | { |
3111 | #if 0 /* FIXME: not ready for prime time? */ | |
3112 | return pi->prstatus.pr_tid; | |
3113 | #else | |
3114 | return 0; | |
3115 | #endif | |
c906108c SS |
3116 | } |
3117 | ||
c3f6f71d JM |
3118 | #else |
3119 | /* | |
3120 | * Default version | |
3121 | */ | |
19958708 | 3122 | int |
fba45db2 | 3123 | proc_get_current_thread (procinfo *pi) |
c906108c | 3124 | { |
c3f6f71d JM |
3125 | return 0; |
3126 | } | |
3127 | ||
3128 | #endif | |
3129 | #endif | |
c906108c | 3130 | |
c3f6f71d | 3131 | /* |
19958708 | 3132 | * Function: proc_update_threads |
c3f6f71d JM |
3133 | * |
3134 | * Discover the IDs of all the threads within the process, and | |
3135 | * create a procinfo for each of them (chained to the parent). | |
3136 | * | |
3137 | * This unfortunately requires a different method on every OS. | |
3138 | * | |
3139 | * Return: non-zero for success, zero for failure. | |
3140 | */ | |
c906108c | 3141 | |
c3f6f71d | 3142 | int |
fba45db2 | 3143 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3144 | { |
3145 | if (thread && parent) /* sanity */ | |
c906108c | 3146 | { |
c3f6f71d JM |
3147 | thread->status_valid = 0; |
3148 | if (!proc_get_status (thread)) | |
3149 | destroy_one_procinfo (&parent->thread_list, thread); | |
3150 | } | |
3151 | return 0; /* keep iterating */ | |
3152 | } | |
c5aa993b | 3153 | |
c3f6f71d JM |
3154 | #if defined (PIOCLSTATUS) |
3155 | /* | |
3156 | * Solaris 2.5 (ioctl) version | |
3157 | */ | |
3158 | int | |
fba45db2 | 3159 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3160 | { |
3161 | gdb_prstatus_t *prstatus; | |
3162 | struct cleanup *old_chain = NULL; | |
3163 | procinfo *thread; | |
3164 | int nlwp, i; | |
3165 | ||
3166 | /* | |
3167 | * We should never have to apply this operation to any procinfo | |
3168 | * except the one for the main process. If that ever changes | |
19958708 | 3169 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3170 | * replace it with one that makes sure the ctl_fd is open. |
3171 | */ | |
19958708 | 3172 | |
c3f6f71d JM |
3173 | if (pi->tid != 0) |
3174 | pi = find_procinfo_or_die (pi->pid, 0); | |
3175 | ||
3176 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3177 | ||
3178 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3179 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3180 | ||
3c37485b | 3181 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3182 | |
b8c9b27d | 3183 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3184 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3185 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3186 | ||
3187 | /* Skip element zero, which represents the process as a whole. */ | |
3188 | for (i = 1; i < nlwp + 1; i++) | |
3189 | { | |
3190 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3191 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3192 | |
c3f6f71d JM |
3193 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3194 | thread->status_valid = 1; | |
3195 | } | |
3196 | pi->threads_valid = 1; | |
3197 | do_cleanups (old_chain); | |
3198 | return 1; | |
3199 | } | |
3200 | #else | |
3201 | #ifdef NEW_PROC_API | |
3202 | /* | |
3203 | * Unixware and Solaris 6 (and later) version | |
3204 | */ | |
004527cb AC |
3205 | static void |
3206 | do_closedir_cleanup (void *dir) | |
3207 | { | |
3208 | closedir (dir); | |
3209 | } | |
3210 | ||
c3f6f71d | 3211 | int |
fba45db2 | 3212 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3213 | { |
3214 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3215 | struct dirent *direntry; | |
3216 | struct cleanup *old_chain = NULL; | |
3217 | procinfo *thread; | |
3218 | DIR *dirp; | |
3219 | int lwpid; | |
3220 | ||
3221 | /* | |
3222 | * We should never have to apply this operation to any procinfo | |
3223 | * except the one for the main process. If that ever changes | |
19958708 | 3224 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3225 | * replace it with one that makes sure the ctl_fd is open. |
3226 | */ | |
19958708 | 3227 | |
c3f6f71d JM |
3228 | if (pi->tid != 0) |
3229 | pi = find_procinfo_or_die (pi->pid, 0); | |
3230 | ||
3231 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3232 | ||
3233 | /* | |
3234 | * Unixware | |
3235 | * | |
19958708 RM |
3236 | * Note: this brute-force method is the only way I know of |
3237 | * to accomplish this task on Unixware. This method will | |
c3f6f71d JM |
3238 | * also work on Solaris 2.6 and 2.7. There is a much simpler |
3239 | * and more elegant way to do this on Solaris, but the margins | |
3240 | * of this manuscript are too small to write it here... ;-) | |
3241 | */ | |
3242 | ||
3243 | strcpy (pathname, pi->pathname); | |
3244 | strcat (pathname, "/lwp"); | |
3245 | if ((dirp = opendir (pathname)) == NULL) | |
3246 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3247 | ||
004527cb | 3248 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3249 | while ((direntry = readdir (dirp)) != NULL) |
3250 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3251 | { | |
3252 | lwpid = atoi (&direntry->d_name[0]); | |
3253 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3254 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3255 | } | |
3256 | pi->threads_valid = 1; | |
3257 | do_cleanups (old_chain); | |
3258 | return 1; | |
3259 | } | |
3260 | #else | |
3261 | #ifdef PIOCTLIST | |
3262 | /* | |
3263 | * OSF version | |
3264 | */ | |
19958708 | 3265 | int |
fba45db2 | 3266 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3267 | { |
3268 | int nthreads, i; | |
3269 | tid_t *threads; | |
3270 | ||
3271 | /* | |
3272 | * We should never have to apply this operation to any procinfo | |
3273 | * except the one for the main process. If that ever changes | |
19958708 | 3274 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3275 | * replace it with one that makes sure the ctl_fd is open. |
3276 | */ | |
19958708 | 3277 | |
c3f6f71d JM |
3278 | if (pi->tid != 0) |
3279 | pi = find_procinfo_or_die (pi->pid, 0); | |
3280 | ||
3281 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3282 | ||
3283 | nthreads = proc_get_nthreads (pi); | |
3284 | if (nthreads < 2) | |
3285 | return 0; /* nothing to do for 1 or fewer threads */ | |
3286 | ||
3c37485b | 3287 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3288 | |
c3f6f71d JM |
3289 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3290 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3291 | ||
3292 | for (i = 0; i < nthreads; i++) | |
3293 | { | |
3294 | if (!find_procinfo (pi->pid, threads[i])) | |
3295 | if (!create_procinfo (pi->pid, threads[i])) | |
3296 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3297 | } |
c3f6f71d JM |
3298 | pi->threads_valid = 1; |
3299 | return 1; | |
c906108c | 3300 | } |
c3f6f71d JM |
3301 | #else |
3302 | /* | |
3303 | * Default version | |
3304 | */ | |
3305 | int | |
fba45db2 | 3306 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3307 | { |
3308 | return 0; | |
3309 | } | |
3310 | #endif /* OSF PIOCTLIST */ | |
3311 | #endif /* NEW_PROC_API */ | |
3312 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3313 | |
c3f6f71d JM |
3314 | /* |
3315 | * Function: proc_iterate_over_threads | |
3316 | * | |
3317 | * Description: | |
3318 | * Given a pointer to a function, call that function once | |
3319 | * for each lwp in the procinfo list, until the function | |
3320 | * returns non-zero, in which event return the value | |
3321 | * returned by the function. | |
3322 | * | |
3323 | * Note: this function does NOT call update_threads. | |
3324 | * If you want to discover new threads first, you must | |
3325 | * call that function explicitly. This function just makes | |
19958708 RM |
3326 | * a quick pass over the currently-known procinfos. |
3327 | * | |
c3f6f71d JM |
3328 | * Arguments: |
3329 | * pi - parent process procinfo | |
3330 | * func - per-thread function | |
3331 | * ptr - opaque parameter for function. | |
3332 | * | |
3333 | * Return: | |
3334 | * First non-zero return value from the callee, or zero. | |
3335 | */ | |
3336 | ||
3337 | int | |
d0849a9a KB |
3338 | proc_iterate_over_threads (procinfo *pi, |
3339 | int (*func) (procinfo *, procinfo *, void *), | |
3340 | void *ptr) | |
c906108c | 3341 | { |
c3f6f71d JM |
3342 | procinfo *thread, *next; |
3343 | int retval = 0; | |
c906108c | 3344 | |
c3f6f71d JM |
3345 | /* |
3346 | * We should never have to apply this operation to any procinfo | |
3347 | * except the one for the main process. If that ever changes | |
19958708 | 3348 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3349 | * replace it with one that makes sure the ctl_fd is open. |
3350 | */ | |
19958708 | 3351 | |
c3f6f71d JM |
3352 | if (pi->tid != 0) |
3353 | pi = find_procinfo_or_die (pi->pid, 0); | |
3354 | ||
3355 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3356 | { |
c3f6f71d JM |
3357 | next = thread->next; /* in case thread is destroyed */ |
3358 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3359 | break; | |
c906108c | 3360 | } |
c3f6f71d JM |
3361 | |
3362 | return retval; | |
c906108c SS |
3363 | } |
3364 | ||
c3f6f71d JM |
3365 | /* =================== END, Thread "MODULE" =================== */ |
3366 | ||
3367 | /* =================== END, /proc "MODULE" =================== */ | |
3368 | ||
3369 | /* =================== GDB "MODULE" =================== */ | |
3370 | ||
3371 | /* | |
3372 | * Here are all of the gdb target vector functions and their friends. | |
3373 | */ | |
3374 | ||
39f77062 | 3375 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3376 | static void do_detach (int signo); |
37de36c6 | 3377 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
c3f6f71d JM |
3378 | |
3379 | /* | |
3380 | * Function: procfs_debug_inferior | |
3381 | * | |
3382 | * Sets up the inferior to be debugged. | |
3383 | * Registers to trace signals, hardware faults, and syscalls. | |
3384 | * Note: does not set RLC flag: caller may want to customize that. | |
3385 | * | |
3386 | * Returns: zero for success (note! unlike most functions in this module) | |
3387 | * On failure, returns the LINE NUMBER where it failed! | |
3388 | */ | |
3389 | ||
3390 | static int | |
fba45db2 | 3391 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3392 | { |
c3f6f71d | 3393 | fltset_t traced_faults; |
37de36c6 KB |
3394 | gdb_sigset_t traced_signals; |
3395 | sysset_t *traced_syscall_entries; | |
3396 | sysset_t *traced_syscall_exits; | |
3397 | int status; | |
c906108c | 3398 | |
c3f6f71d JM |
3399 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3400 | /* On some systems (OSF), we don't trace hardware faults. | |
3401 | Apparently it's enough that we catch them as signals. | |
3402 | Wonder why we don't just do that in general? */ | |
3403 | premptyset (&traced_faults); /* don't trace faults. */ | |
3404 | #else | |
3405 | /* Register to trace hardware faults in the child. */ | |
3406 | prfillset (&traced_faults); /* trace all faults... */ | |
3407 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ | |
3408 | #endif | |
3409 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3410 | return __LINE__; | |
c906108c | 3411 | |
c3f6f71d JM |
3412 | /* Register to trace selected signals in the child. */ |
3413 | premptyset (&traced_signals); | |
3414 | if (!register_gdb_signals (pi, &traced_signals)) | |
3415 | return __LINE__; | |
3416 | ||
37de36c6 | 3417 | |
c3f6f71d | 3418 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3419 | traced_syscall_entries = sysset_t_alloc (pi); |
3420 | gdb_premptysysset (traced_syscall_entries); | |
3421 | #ifdef SYS_exit | |
3422 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3423 | #endif | |
c3f6f71d | 3424 | #ifdef SYS_lwpexit |
37de36c6 | 3425 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3426 | #endif |
3427 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3428 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3429 | #endif | |
3430 | #ifdef DYNAMIC_SYSCALLS | |
3431 | { | |
3432 | int callnum = find_syscall (pi, "_exit"); | |
3433 | if (callnum >= 0) | |
3434 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3435 | } | |
c906108c SS |
3436 | #endif |
3437 | ||
37de36c6 KB |
3438 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3439 | xfree (traced_syscall_entries); | |
3440 | if (!status) | |
c3f6f71d JM |
3441 | return __LINE__; |
3442 | ||
3443 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3444 | /* OSF method for tracing exec syscalls. Quoting: | |
3445 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3446 | exits from exec system calls because of the user level loader. */ | |
3447 | /* FIXME: make nice and maybe move into an access function. */ | |
3448 | { | |
3449 | int prfs_flags; | |
3450 | ||
3451 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3452 | return __LINE__; | |
3453 | ||
3454 | prfs_flags |= PRFS_STOPEXEC; | |
3455 | ||
3456 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3457 | return __LINE__; | |
3458 | } | |
3459 | #else /* not PRFS_STOPEXEC */ | |
3460 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3461 | /* GW: Rationale... | |
3462 | Not all systems with /proc have all the exec* syscalls with the same | |
3463 | names. On the SGI, for example, there is no SYS_exec, but there | |
3464 | *is* a SYS_execv. So, we try to account for that. */ | |
3465 | ||
37de36c6 KB |
3466 | traced_syscall_exits = sysset_t_alloc (pi); |
3467 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3468 | #ifdef SYS_exec |
37de36c6 | 3469 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3470 | #endif |
3471 | #ifdef SYS_execve | |
37de36c6 | 3472 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3473 | #endif |
3474 | #ifdef SYS_execv | |
37de36c6 | 3475 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3476 | #endif |
c5aa993b | 3477 | |
c3f6f71d | 3478 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3479 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3480 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3481 | #endif |
c5aa993b | 3482 | |
c3f6f71d | 3483 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3484 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3485 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3486 | #endif |
c5aa993b | 3487 | |
37de36c6 KB |
3488 | #ifdef DYNAMIC_SYSCALLS |
3489 | { | |
3490 | int callnum = find_syscall (pi, "execve"); | |
3491 | if (callnum >= 0) | |
3492 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3493 | callnum = find_syscall (pi, "ra_execve"); | |
3494 | if (callnum >= 0) | |
3495 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3496 | } | |
3497 | #endif | |
c906108c | 3498 | |
37de36c6 KB |
3499 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3500 | xfree (traced_syscall_exits); | |
3501 | if (!status) | |
c3f6f71d JM |
3502 | return __LINE__; |
3503 | ||
3504 | #endif /* PRFS_STOPEXEC */ | |
3505 | return 0; | |
c906108c SS |
3506 | } |
3507 | ||
19958708 | 3508 | static void |
fba45db2 | 3509 | procfs_attach (char *args, int from_tty) |
c906108c | 3510 | { |
c3f6f71d JM |
3511 | char *exec_file; |
3512 | int pid; | |
3513 | ||
3514 | if (!args) | |
3515 | error_no_arg ("process-id to attach"); | |
3516 | ||
3517 | pid = atoi (args); | |
3518 | if (pid == getpid ()) | |
3519 | error ("Attaching GDB to itself is not a good idea..."); | |
c906108c | 3520 | |
c3f6f71d | 3521 | if (from_tty) |
c906108c | 3522 | { |
c3f6f71d JM |
3523 | exec_file = get_exec_file (0); |
3524 | ||
3525 | if (exec_file) | |
19958708 | 3526 | printf_filtered ("Attaching to program `%s', %s\n", |
39f77062 | 3527 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3528 | else |
39f77062 KB |
3529 | printf_filtered ("Attaching to %s\n", |
3530 | target_pid_to_str (pid_to_ptid (pid))); | |
c3f6f71d JM |
3531 | |
3532 | fflush (stdout); | |
c906108c | 3533 | } |
39f77062 | 3534 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
c3f6f71d JM |
3535 | push_target (&procfs_ops); |
3536 | } | |
3537 | ||
19958708 | 3538 | static void |
fba45db2 | 3539 | procfs_detach (char *args, int from_tty) |
c3f6f71d JM |
3540 | { |
3541 | char *exec_file; | |
3542 | int signo = 0; | |
3543 | ||
3544 | if (from_tty) | |
c906108c | 3545 | { |
c3f6f71d JM |
3546 | exec_file = get_exec_file (0); |
3547 | if (exec_file == 0) | |
3548 | exec_file = ""; | |
3549 | printf_filtered ("Detaching from program: %s %s\n", | |
39f77062 | 3550 | exec_file, target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3551 | fflush (stdout); |
c906108c | 3552 | } |
c3f6f71d JM |
3553 | if (args) |
3554 | signo = atoi (args); | |
19958708 | 3555 | |
c3f6f71d | 3556 | do_detach (signo); |
39f77062 | 3557 | inferior_ptid = null_ptid; |
c3f6f71d | 3558 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ |
c906108c SS |
3559 | } |
3560 | ||
39f77062 KB |
3561 | static ptid_t |
3562 | do_attach (ptid_t ptid) | |
c906108c | 3563 | { |
c3f6f71d JM |
3564 | procinfo *pi; |
3565 | int fail; | |
3566 | ||
39f77062 | 3567 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
c3f6f71d JM |
3568 | perror ("procfs: out of memory in 'attach'"); |
3569 | ||
3570 | if (!open_procinfo_files (pi, FD_CTL)) | |
3571 | { | |
3572 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3573 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3574 | PIDGET (ptid)); |
c3f6f71d JM |
3575 | dead_procinfo (pi, errmsg, NOKILL); |
3576 | } | |
c906108c | 3577 | |
c3f6f71d JM |
3578 | /* Stop the process (if it isn't already stopped). */ |
3579 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3580 | { |
c3f6f71d JM |
3581 | pi->was_stopped = 1; |
3582 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3583 | } |
3584 | else | |
3585 | { | |
c3f6f71d JM |
3586 | pi->was_stopped = 0; |
3587 | /* Set the process to run again when we close it. */ | |
3588 | if (!proc_set_run_on_last_close (pi)) | |
3589 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3590 | ||
3591 | /* Now stop the process. */ | |
3592 | if (!proc_stop_process (pi)) | |
3593 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3594 | pi->ignore_next_sigstop = 1; | |
c906108c | 3595 | } |
c3f6f71d JM |
3596 | /* Save some of the /proc state to be restored if we detach. */ |
3597 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3598 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3599 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3600 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3601 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3602 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3603 | NOKILL); | |
37de36c6 | 3604 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3605 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3606 | NOKILL); |
3607 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3608 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3609 | ||
3610 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3611 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3612 | ||
3613 | /* Let GDB know that the inferior was attached. */ | |
3614 | attach_flag = 1; | |
3615 | return MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
c906108c SS |
3616 | } |
3617 | ||
3618 | static void | |
fba45db2 | 3619 | do_detach (int signo) |
c906108c | 3620 | { |
c3f6f71d | 3621 | procinfo *pi; |
c906108c | 3622 | |
c3f6f71d | 3623 | /* Find procinfo for the main process */ |
39f77062 | 3624 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3625 | if (signo) |
3626 | if (!proc_set_current_signal (pi, signo)) | |
3627 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3628 | |
c3f6f71d JM |
3629 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3630 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3631 | |
c3f6f71d JM |
3632 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3633 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3634 | ||
37de36c6 | 3635 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3636 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3637 | ||
37de36c6 | 3638 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3639 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3640 | ||
3641 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3642 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3643 | ||
3644 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3645 | if (signo || !(pi->was_stopped) || | |
3646 | query ("Was stopped when attached, make it runnable again? ")) | |
3647 | { | |
3648 | /* Clear any pending signal. */ | |
3649 | if (!proc_clear_current_fault (pi)) | |
3650 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3651 | ||
1a303dec MS |
3652 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3653 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3654 | ||
c3f6f71d JM |
3655 | if (!proc_set_run_on_last_close (pi)) |
3656 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3657 | } | |
3658 | ||
3659 | attach_flag = 0; | |
3660 | destroy_procinfo (pi); | |
c906108c SS |
3661 | } |
3662 | ||
c3f6f71d JM |
3663 | /* |
3664 | * fetch_registers | |
3665 | * | |
3666 | * Since the /proc interface cannot give us individual registers, | |
3667 | * we pay no attention to the (regno) argument, and just fetch them all. | |
3668 | * This results in the possibility that we will do unnecessarily many | |
3669 | * fetches, since we may be called repeatedly for individual registers. | |
3670 | * So we cache the results, and mark the cache invalid when the process | |
3671 | * is resumed. | |
3672 | */ | |
3673 | ||
c906108c | 3674 | static void |
fba45db2 | 3675 | procfs_fetch_registers (int regno) |
c906108c | 3676 | { |
c3f6f71d JM |
3677 | gdb_fpregset_t *fpregs; |
3678 | gdb_gregset_t *gregs; | |
3679 | procinfo *pi; | |
3680 | int pid; | |
3681 | int tid; | |
c906108c | 3682 | |
39f77062 KB |
3683 | pid = PIDGET (inferior_ptid); |
3684 | tid = TIDGET (inferior_ptid); | |
c3f6f71d JM |
3685 | |
3686 | /* First look up procinfo for the main process. */ | |
3687 | pi = find_procinfo_or_die (pid, 0); | |
3688 | ||
19958708 RM |
3689 | /* If the event thread is not the same as GDB's requested thread |
3690 | (ie. inferior_ptid), then look up procinfo for the requested | |
c3f6f71d | 3691 | thread. */ |
19958708 | 3692 | if ((tid != 0) && |
c3f6f71d JM |
3693 | (tid != proc_get_current_thread (pi))) |
3694 | pi = find_procinfo_or_die (pid, tid); | |
3695 | ||
3696 | if (pi == NULL) | |
19958708 | 3697 | error ("procfs: fetch_registers failed to find procinfo for %s", |
39f77062 | 3698 | target_pid_to_str (inferior_ptid)); |
c3f6f71d JM |
3699 | |
3700 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3701 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); | |
3702 | ||
3703 | supply_gregset (gregs); | |
3704 | ||
60054393 MS |
3705 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3706 | { | |
afb18d0f AC |
3707 | if ((regno >= 0 && regno < FP0_REGNUM) |
3708 | || regno == PC_REGNUM | |
3709 | || regno == DEPRECATED_FP_REGNUM | |
3710 | || regno == SP_REGNUM) | |
60054393 | 3711 | return; /* not a floating point register */ |
c5aa993b | 3712 | |
60054393 MS |
3713 | if ((fpregs = proc_get_fpregs (pi)) == NULL) |
3714 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); | |
c906108c | 3715 | |
60054393 MS |
3716 | supply_fpregset (fpregs); |
3717 | } | |
c906108c SS |
3718 | } |
3719 | ||
c3f6f71d JM |
3720 | /* Get ready to modify the registers array. On machines which store |
3721 | individual registers, this doesn't need to do anything. On | |
3722 | machines which store all the registers in one fell swoop, such as | |
3723 | /proc, this makes sure that registers contains all the registers | |
3724 | from the program being debugged. */ | |
3725 | ||
c906108c | 3726 | static void |
fba45db2 | 3727 | procfs_prepare_to_store (void) |
c906108c | 3728 | { |
c3f6f71d JM |
3729 | #ifdef CHILD_PREPARE_TO_STORE |
3730 | CHILD_PREPARE_TO_STORE (); | |
c906108c | 3731 | #endif |
c906108c SS |
3732 | } |
3733 | ||
3734 | /* | |
c3f6f71d JM |
3735 | * store_registers |
3736 | * | |
19958708 | 3737 | * Since the /proc interface will not read individual registers, |
c3f6f71d JM |
3738 | * we will cache these requests until the process is resumed, and |
3739 | * only then write them back to the inferior process. | |
3740 | * | |
3741 | * FIXME: is that a really bad idea? Have to think about cases | |
3742 | * where writing one register might affect the value of others, etc. | |
3743 | */ | |
c906108c | 3744 | |
c3f6f71d | 3745 | static void |
fba45db2 | 3746 | procfs_store_registers (int regno) |
c3f6f71d JM |
3747 | { |
3748 | gdb_fpregset_t *fpregs; | |
3749 | gdb_gregset_t *gregs; | |
3750 | procinfo *pi; | |
3751 | int pid; | |
3752 | int tid; | |
c906108c | 3753 | |
39f77062 KB |
3754 | pid = PIDGET (inferior_ptid); |
3755 | tid = TIDGET (inferior_ptid); | |
c906108c | 3756 | |
c3f6f71d JM |
3757 | /* First find procinfo for main process */ |
3758 | pi = find_procinfo_or_die (pid, 0); | |
3759 | ||
3760 | /* If current lwp for process is not the same as requested thread | |
39f77062 | 3761 | (ie. inferior_ptid), then find procinfo for the requested thread. */ |
c3f6f71d | 3762 | |
19958708 | 3763 | if ((tid != 0) && |
c3f6f71d JM |
3764 | (tid != proc_get_current_thread (pi))) |
3765 | pi = find_procinfo_or_die (pid, tid); | |
3766 | ||
3767 | if (pi == NULL) | |
3768 | error ("procfs: store_registers: failed to find procinfo for %s", | |
39f77062 | 3769 | target_pid_to_str (inferior_ptid)); |
c906108c | 3770 | |
c3f6f71d JM |
3771 | if ((gregs = proc_get_gregs (pi)) == NULL) |
3772 | proc_error (pi, "store_registers, get_gregs", __LINE__); | |
c906108c | 3773 | |
c3f6f71d JM |
3774 | fill_gregset (gregs, regno); |
3775 | if (!proc_set_gregs (pi)) | |
3776 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3777 | |
60054393 MS |
3778 | if (FP0_REGNUM >= 0) /* need floating point? */ |
3779 | { | |
afb18d0f AC |
3780 | if ((regno >= 0 && regno < FP0_REGNUM) |
3781 | || regno == PC_REGNUM | |
3782 | || regno == DEPRECATED_FP_REGNUM | |
3783 | || regno == SP_REGNUM) | |
60054393 MS |
3784 | return; /* not a floating point register */ |
3785 | ||
3786 | if ((fpregs = proc_get_fpregs (pi)) == NULL) | |
3787 | proc_error (pi, "store_registers, get_fpregs", __LINE__); | |
3788 | ||
3789 | fill_fpregset (fpregs, regno); | |
3790 | if (!proc_set_fpregs (pi)) | |
3791 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3792 | } | |
c3f6f71d | 3793 | } |
c906108c | 3794 | |
37de36c6 KB |
3795 | static int |
3796 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3797 | { | |
3798 | ||
3799 | #ifdef SYS_lwp_exit | |
3800 | if (scall == SYS_lwp_exit) | |
3801 | return 1; | |
3802 | #endif | |
3803 | #ifdef SYS_lwpexit | |
3804 | if (scall == SYS_lwpexit) | |
3805 | return 1; | |
3806 | #endif | |
3807 | return 0; | |
3808 | } | |
3809 | ||
3810 | static int | |
3811 | syscall_is_exit (procinfo *pi, int scall) | |
3812 | { | |
3813 | #ifdef SYS_exit | |
3814 | if (scall == SYS_exit) | |
3815 | return 1; | |
3816 | #endif | |
3817 | #ifdef DYNAMIC_SYSCALLS | |
3818 | if (find_syscall (pi, "_exit") == scall) | |
3819 | return 1; | |
3820 | #endif | |
3821 | return 0; | |
3822 | } | |
3823 | ||
3824 | static int | |
3825 | syscall_is_exec (procinfo *pi, int scall) | |
3826 | { | |
3827 | #ifdef SYS_exec | |
3828 | if (scall == SYS_exec) | |
3829 | return 1; | |
3830 | #endif | |
3831 | #ifdef SYS_execv | |
3832 | if (scall == SYS_execv) | |
3833 | return 1; | |
3834 | #endif | |
3835 | #ifdef SYS_execve | |
3836 | if (scall == SYS_execve) | |
3837 | return 1; | |
3838 | #endif | |
3839 | #ifdef DYNAMIC_SYSCALLS | |
3840 | if (find_syscall (pi, "_execve")) | |
3841 | return 1; | |
3842 | if (find_syscall (pi, "ra_execve")) | |
3843 | return 1; | |
3844 | #endif | |
3845 | return 0; | |
3846 | } | |
3847 | ||
3848 | static int | |
3849 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3850 | { | |
3851 | #ifdef SYS_lwp_create | |
3852 | if (scall == SYS_lwp_create) | |
3853 | return 1; | |
3854 | #endif | |
3855 | #ifdef SYS_lwpcreate | |
3856 | if (scall == SYS_lwpcreate) | |
3857 | return 1; | |
3858 | #endif | |
3859 | return 0; | |
3860 | } | |
3861 | ||
c3f6f71d JM |
3862 | /* |
3863 | * Function: target_wait | |
3864 | * | |
3865 | * Retrieve the next stop event from the child process. | |
3866 | * If child has not stopped yet, wait for it to stop. | |
3867 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
3868 | * into gdb internal event codes. | |
3869 | * | |
3870 | * Return: id of process (and possibly thread) that incurred the event. | |
3871 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
3872 | */ |
3873 | ||
39f77062 KB |
3874 | static ptid_t |
3875 | procfs_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c | 3876 | { |
c3f6f71d JM |
3877 | /* First cut: loosely based on original version 2.1 */ |
3878 | procinfo *pi; | |
39f77062 KB |
3879 | int wstat; |
3880 | int temp_tid; | |
3881 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3882 | int why, what, flags; |
3883 | int retry = 0; | |
c906108c | 3884 | |
c3f6f71d | 3885 | wait_again: |
c906108c | 3886 | |
c3f6f71d JM |
3887 | retry++; |
3888 | wstat = 0; | |
39f77062 | 3889 | retval = pid_to_ptid (-1); |
c906108c | 3890 | |
c3f6f71d | 3891 | /* Find procinfo for main process */ |
39f77062 | 3892 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3893 | if (pi) |
c906108c | 3894 | { |
c3f6f71d JM |
3895 | /* We must assume that the status is stale now... */ |
3896 | pi->status_valid = 0; | |
3897 | pi->gregs_valid = 0; | |
3898 | pi->fpregs_valid = 0; | |
3899 | ||
3900 | #if 0 /* just try this out... */ | |
3901 | flags = proc_flags (pi); | |
3902 | why = proc_why (pi); | |
3903 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3904 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3905 | #endif | |
3906 | /* If child is not stopped, wait for it to stop. */ | |
3907 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3908 | !proc_wait_for_stop (pi)) | |
c906108c | 3909 | { |
c3f6f71d JM |
3910 | /* wait_for_stop failed: has the child terminated? */ |
3911 | if (errno == ENOENT) | |
c906108c | 3912 | { |
39f77062 KB |
3913 | int wait_retval; |
3914 | ||
c3f6f71d | 3915 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 3916 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 3917 | |
39f77062 | 3918 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
c3f6f71d | 3919 | error ("procfs: couldn't stop process %d: wait returned %d\n", |
39f77062 | 3920 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
3921 | /* FIXME: might I not just use waitpid? |
3922 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 3923 | retval = pid_to_ptid (wait_retval); |
c906108c | 3924 | } |
d1566ff5 FN |
3925 | else if (errno == EINTR) |
3926 | goto wait_again; | |
c3f6f71d | 3927 | else |
c906108c | 3928 | { |
c3f6f71d JM |
3929 | /* Unknown error from wait_for_stop. */ |
3930 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3931 | } |
c3f6f71d JM |
3932 | } |
3933 | else | |
3934 | { | |
3935 | /* This long block is reached if either: | |
3936 | a) the child was already stopped, or | |
3937 | b) we successfully waited for the child with wait_for_stop. | |
3938 | This block will analyze the /proc status, and translate it | |
3939 | into a waitstatus for GDB. | |
3940 | ||
3941 | If we actually had to call wait because the /proc file | |
19958708 | 3942 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3943 | because we already have a waitstatus. */ |
3944 | ||
3945 | flags = proc_flags (pi); | |
3946 | why = proc_why (pi); | |
3947 | what = proc_what (pi); | |
3948 | ||
c3f6f71d | 3949 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3950 | { |
c3f6f71d JM |
3951 | #ifdef PR_ASYNC |
3952 | /* If it's running async (for single_thread control), | |
3953 | set it back to normal again. */ | |
3954 | if (flags & PR_ASYNC) | |
3955 | if (!proc_unset_async (pi)) | |
3956 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3957 | #endif | |
3958 | ||
3959 | if (info_verbose) | |
3960 | proc_prettyprint_why (why, what, 1); | |
3961 | ||
3962 | /* The 'pid' we will return to GDB is composed of | |
3963 | the process ID plus the lwp ID. */ | |
3964 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3965 | ||
3966 | switch (why) { | |
3967 | case PR_SIGNALLED: | |
3968 | wstat = (what << 8) | 0177; | |
3969 | break; | |
3970 | case PR_SYSENTRY: | |
37de36c6 | 3971 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3972 | { |
37de36c6 KB |
3973 | printf_filtered ("[%s exited]\n", |
3974 | target_pid_to_str (retval)); | |
3975 | delete_thread (retval); | |
3976 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3977 | return retval; | |
3978 | } | |
3979 | else if (syscall_is_exit (pi, what)) | |
3980 | { | |
3981 | /* Handle SYS_exit call only */ | |
3982 | /* Stopped at entry to SYS_exit. | |
19958708 | 3983 | Make it runnable, resume it, then use |
37de36c6 | 3984 | the wait system call to get its exit code. |
19958708 | 3985 | Proc_run_process always clears the current |
37de36c6 KB |
3986 | fault and signal. |
3987 | Then return its exit status. */ | |
3988 | pi->status_valid = 0; | |
3989 | wstat = 0; | |
19958708 | 3990 | /* FIXME: what we should do is return |
37de36c6 KB |
3991 | TARGET_WAITKIND_SPURIOUS. */ |
3992 | if (!proc_run_process (pi, 0, 0)) | |
3993 | proc_error (pi, "target_wait, run_process", __LINE__); | |
3994 | if (attach_flag) | |
c3f6f71d | 3995 | { |
19958708 | 3996 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3997 | return a "success" exit code. Bogus: what if |
3998 | it returns something else? */ | |
3999 | wstat = 0; | |
39f77062 | 4000 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
4001 | } |
4002 | else | |
4003 | { | |
4004 | int temp = wait (&wstat); | |
4005 | ||
4006 | /* FIXME: shouldn't I make sure I get the right | |
4007 | event from the right process? If (for | |
4008 | instance) I have killed an earlier inferior | |
4009 | process but failed to clean up after it | |
4010 | somehow, I could get its termination event | |
4011 | here. */ | |
4012 | ||
4013 | /* If wait returns -1, that's what we return to GDB. */ | |
4014 | if (temp < 0) | |
39f77062 | 4015 | retval = pid_to_ptid (temp); |
c3f6f71d | 4016 | } |
c3f6f71d | 4017 | } |
37de36c6 KB |
4018 | else |
4019 | { | |
4020 | printf_filtered ("procfs: trapped on entry to "); | |
4021 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4022 | printf_filtered ("\n"); | |
4023 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4024 | { |
37de36c6 | 4025 | long i, nsysargs, *sysargs; |
c3f6f71d | 4026 | |
37de36c6 KB |
4027 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4028 | (sysargs = proc_sysargs (pi)) != NULL) | |
4029 | { | |
4030 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4031 | for (i = 0; i < nsysargs; i++) | |
19958708 | 4032 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4033 | i, sysargs[i]); |
4034 | } | |
c3f6f71d | 4035 | |
c3f6f71d | 4036 | } |
c3f6f71d | 4037 | #endif |
37de36c6 KB |
4038 | if (status) |
4039 | { | |
4040 | /* How to exit gracefully, returning "unknown event" */ | |
4041 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4042 | return inferior_ptid; |
37de36c6 KB |
4043 | } |
4044 | else | |
4045 | { | |
4046 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4047 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4048 | goto wait_again; |
4049 | } | |
4050 | } | |
4051 | break; | |
4052 | case PR_SYSEXIT: | |
4053 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4054 | { |
37de36c6 KB |
4055 | /* Hopefully this is our own "fork-child" execing |
4056 | the real child. Hoax this event into a trap, and | |
4057 | GDB will see the child about to execute its start | |
4058 | address. */ | |
4059 | wstat = (SIGTRAP << 8) | 0177; | |
4060 | } | |
4061 | else if (syscall_is_lwp_create (pi, what)) | |
4062 | { | |
4063 | /* | |
4064 | * This syscall is somewhat like fork/exec. | |
4065 | * We will get the event twice: once for the parent LWP, | |
4066 | * and once for the child. We should already know about | |
4067 | * the parent LWP, but the child will be new to us. So, | |
4068 | * whenever we get this event, if it represents a new | |
4069 | * thread, simply add the thread to the list. | |
4070 | */ | |
c3f6f71d | 4071 | |
37de36c6 | 4072 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4073 | temp_tid = proc_get_current_thread (pi); |
4074 | if (!find_procinfo (pi->pid, temp_tid)) | |
4075 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4076 | |
39f77062 | 4077 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4078 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4079 | if (!in_thread_list (temp_ptid)) |
c3f6f71d | 4080 | { |
39f77062 KB |
4081 | printf_filtered ("[New %s]\n", |
4082 | target_pid_to_str (temp_ptid)); | |
4083 | add_thread (temp_ptid); | |
c3f6f71d | 4084 | } |
37de36c6 KB |
4085 | /* Return to WFI, but tell it to immediately resume. */ |
4086 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4087 | return inferior_ptid; |
37de36c6 KB |
4088 | } |
4089 | else if (syscall_is_lwp_exit (pi, what)) | |
4090 | { | |
4091 | printf_filtered ("[%s exited]\n", | |
4092 | target_pid_to_str (retval)); | |
4093 | delete_thread (retval); | |
4094 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4095 | return retval; | |
c3f6f71d | 4096 | } |
37de36c6 KB |
4097 | else if (0) |
4098 | { | |
4099 | /* FIXME: Do we need to handle SYS_sproc, | |
4100 | SYS_fork, or SYS_vfork here? The old procfs | |
4101 | seemed to use this event to handle threads on | |
4102 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4103 | that threads were actually separate processes. |
37de36c6 KB |
4104 | Irix, maybe? Anyway, low priority for now. */ |
4105 | } | |
4106 | else | |
4107 | { | |
4108 | printf_filtered ("procfs: trapped on exit from "); | |
4109 | proc_prettyprint_syscall (proc_what (pi), 0); | |
4110 | printf_filtered ("\n"); | |
4111 | #ifndef PIOCSSPCACT | |
4112 | { | |
4113 | long i, nsysargs, *sysargs; | |
4114 | ||
4115 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4116 | (sysargs = proc_sysargs (pi)) != NULL) | |
4117 | { | |
4118 | printf_filtered ("%ld syscall arguments:\n", nsysargs); | |
4119 | for (i = 0; i < nsysargs; i++) | |
19958708 | 4120 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4121 | i, sysargs[i]); |
4122 | } | |
4123 | } | |
c3f6f71d | 4124 | #endif |
37de36c6 | 4125 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4126 | return inferior_ptid; |
37de36c6 | 4127 | } |
c3f6f71d JM |
4128 | break; |
4129 | case PR_REQUESTED: | |
4130 | #if 0 /* FIXME */ | |
4131 | wstat = (SIGSTOP << 8) | 0177; | |
4132 | break; | |
4133 | #else | |
4134 | if (retry < 5) | |
4135 | { | |
4136 | printf_filtered ("Retry #%d:\n", retry); | |
4137 | pi->status_valid = 0; | |
4138 | goto wait_again; | |
4139 | } | |
4140 | else | |
4141 | { | |
4142 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4143 | temp_tid = proc_get_current_thread (pi); |
4144 | if (!find_procinfo (pi->pid, temp_tid)) | |
4145 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4146 | |
4147 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4148 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4149 | if (!in_thread_list (temp_ptid)) | |
c3f6f71d | 4150 | { |
19958708 | 4151 | printf_filtered ("[New %s]\n", |
39f77062 KB |
4152 | target_pid_to_str (temp_ptid)); |
4153 | add_thread (temp_ptid); | |
c3f6f71d JM |
4154 | } |
4155 | ||
4156 | status->kind = TARGET_WAITKIND_STOPPED; | |
4157 | status->value.sig = 0; | |
4158 | return retval; | |
4159 | } | |
4160 | #endif | |
4161 | case PR_JOBCONTROL: | |
4162 | wstat = (what << 8) | 0177; | |
4163 | break; | |
4164 | case PR_FAULTED: | |
7af6341f | 4165 | switch (what) { |
c3f6f71d JM |
4166 | #ifdef FLTWATCH |
4167 | case FLTWATCH: | |
4168 | wstat = (SIGTRAP << 8) | 0177; | |
4169 | break; | |
4170 | #endif | |
4171 | #ifdef FLTKWATCH | |
4172 | case FLTKWATCH: | |
4173 | wstat = (SIGTRAP << 8) | 0177; | |
4174 | break; | |
4175 | #endif | |
4176 | /* FIXME: use si_signo where possible. */ | |
4177 | case FLTPRIV: | |
4178 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4179 | case FLTILL: | |
4180 | #endif | |
4181 | wstat = (SIGILL << 8) | 0177; | |
4182 | break; | |
4183 | case FLTBPT: | |
4184 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4185 | case FLTTRACE: | |
4186 | #endif | |
4187 | wstat = (SIGTRAP << 8) | 0177; | |
4188 | break; | |
4189 | case FLTSTACK: | |
4190 | case FLTACCESS: | |
4191 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4192 | case FLTBOUNDS: | |
4193 | #endif | |
4194 | wstat = (SIGSEGV << 8) | 0177; | |
4195 | break; | |
4196 | case FLTIOVF: | |
4197 | case FLTIZDIV: | |
4198 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4199 | case FLTFPE: | |
4200 | #endif | |
4201 | wstat = (SIGFPE << 8) | 0177; | |
4202 | break; | |
4203 | case FLTPAGE: /* Recoverable page fault */ | |
4204 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4205 | retval = pid_to_ptid (-1); |
c3f6f71d JM |
4206 | printf_filtered ("procfs:%d -- ", __LINE__); |
4207 | printf_filtered ("child stopped for unknown reason:\n"); | |
4208 | proc_prettyprint_why (why, what, 1); | |
4209 | error ("... giving up..."); | |
4210 | break; | |
4211 | } | |
4212 | break; /* case PR_FAULTED: */ | |
4213 | default: /* switch (why) unmatched */ | |
4214 | printf_filtered ("procfs:%d -- ", __LINE__); | |
4215 | printf_filtered ("child stopped for unknown reason:\n"); | |
4216 | proc_prettyprint_why (why, what, 1); | |
4217 | error ("... giving up..."); | |
4218 | break; | |
4219 | } | |
4220 | /* | |
4221 | * Got this far without error: | |
4222 | * If retval isn't in the threads database, add it. | |
4223 | */ | |
39f77062 KB |
4224 | if (PIDGET (retval) > 0 && |
4225 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4226 | !in_thread_list (retval)) |
c906108c | 4227 | { |
c3f6f71d | 4228 | /* |
19958708 | 4229 | * We have a new thread. |
c3f6f71d | 4230 | * We need to add it both to GDB's list and to our own. |
19958708 | 4231 | * If we don't create a procinfo, resume may be unhappy |
c3f6f71d JM |
4232 | * later. |
4233 | */ | |
4234 | printf_filtered ("[New %s]\n", target_pid_to_str (retval)); | |
4235 | add_thread (retval); | |
4236 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4237 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
4238 | ||
4239 | /* In addition, it's possible that this is the first | |
19958708 | 4240 | * new thread we've seen, in which case we may not |
39f77062 | 4241 | * have created entries for inferior_ptid yet. |
c3f6f71d | 4242 | */ |
39f77062 | 4243 | if (TIDGET (inferior_ptid) != 0) |
c3f6f71d | 4244 | { |
39f77062 KB |
4245 | if (!in_thread_list (inferior_ptid)) |
4246 | add_thread (inferior_ptid); | |
19958708 | 4247 | if (find_procinfo (PIDGET (inferior_ptid), |
39f77062 | 4248 | TIDGET (inferior_ptid)) == NULL) |
19958708 | 4249 | create_procinfo (PIDGET (inferior_ptid), |
39f77062 | 4250 | TIDGET (inferior_ptid)); |
c3f6f71d | 4251 | } |
c906108c | 4252 | } |
c906108c | 4253 | } |
c3f6f71d | 4254 | else /* flags do not indicate STOPPED */ |
c906108c | 4255 | { |
c3f6f71d JM |
4256 | /* surely this can't happen... */ |
4257 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4258 | __LINE__); | |
4259 | proc_prettyprint_flags (flags, 1); | |
4260 | error ("procfs: ...giving up..."); | |
c906108c | 4261 | } |
c906108c | 4262 | } |
c906108c | 4263 | |
c3f6f71d JM |
4264 | if (status) |
4265 | store_waitstatus (status, wstat); | |
c906108c SS |
4266 | } |
4267 | ||
c3f6f71d JM |
4268 | return retval; |
4269 | } | |
c906108c | 4270 | |
d0849a9a KB |
4271 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4272 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4273 | otherwise transfer them from the target. TARGET is unused. | |
4274 | ||
4275 | The return value is 0 if an error occurred or no bytes were | |
4276 | transferred. Otherwise, it will be a positive value which | |
4277 | indicates the number of bytes transferred between gdb and the | |
4278 | target. (Note that the interface also makes provisions for | |
4279 | negative values, but this capability isn't implemented here.) */ | |
4280 | ||
c3f6f71d | 4281 | static int |
d0849a9a | 4282 | procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite, |
37de36c6 | 4283 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4284 | { |
4285 | procinfo *pi; | |
4286 | int nbytes = 0; | |
c906108c | 4287 | |
c3f6f71d | 4288 | /* Find procinfo for main process */ |
39f77062 | 4289 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4290 | if (pi->as_fd == 0 && |
4291 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4292 | { |
c3f6f71d JM |
4293 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4294 | return 0; | |
c906108c | 4295 | } |
c906108c | 4296 | |
c3f6f71d | 4297 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4298 | { |
c3f6f71d | 4299 | if (dowrite) |
c906108c | 4300 | { |
c3f6f71d JM |
4301 | #ifdef NEW_PROC_API |
4302 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4303 | #else |
c3f6f71d | 4304 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4305 | #endif |
c3f6f71d | 4306 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4307 | } |
c3f6f71d | 4308 | else |
c906108c | 4309 | { |
c3f6f71d JM |
4310 | PROCFS_NOTE ("read memory: \n"); |
4311 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4312 | } |
c3f6f71d | 4313 | if (nbytes < 0) |
c906108c | 4314 | { |
c3f6f71d | 4315 | nbytes = 0; |
c906108c | 4316 | } |
c906108c | 4317 | } |
c3f6f71d | 4318 | return nbytes; |
c906108c SS |
4319 | } |
4320 | ||
4321 | /* | |
c3f6f71d JM |
4322 | * Function: invalidate_cache |
4323 | * | |
4324 | * Called by target_resume before making child runnable. | |
4325 | * Mark cached registers and status's invalid. | |
4326 | * If there are "dirty" caches that need to be written back | |
4327 | * to the child process, do that. | |
4328 | * | |
19958708 | 4329 | * File descriptors are also cached. |
c3f6f71d JM |
4330 | * As they are a limited resource, we cannot hold onto them indefinitely. |
4331 | * However, as they are expensive to open, we don't want to throw them | |
4332 | * away indescriminately either. As a compromise, we will keep the | |
4333 | * file descriptors for the parent process, but discard any file | |
4334 | * descriptors we may have accumulated for the threads. | |
4335 | * | |
4336 | * Return value: | |
19958708 | 4337 | * As this function is called by iterate_over_threads, it always |
c3f6f71d | 4338 | * returns zero (so that iterate_over_threads will keep iterating). |
c906108c SS |
4339 | */ |
4340 | ||
c3f6f71d JM |
4341 | |
4342 | static int | |
fba45db2 | 4343 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4344 | { |
c3f6f71d JM |
4345 | /* |
4346 | * About to run the child; invalidate caches and do any other cleanup. | |
4347 | */ | |
c906108c | 4348 | |
c3f6f71d JM |
4349 | #if 0 |
4350 | if (pi->gregs_dirty) | |
4351 | if (parent == NULL || | |
4352 | proc_get_current_thread (parent) != pi->tid) | |
4353 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4354 | proc_warn (pi, "target_resume, set_gregs", | |
4355 | __LINE__); | |
60054393 MS |
4356 | if (FP0_REGNUM >= 0) |
4357 | if (pi->fpregs_dirty) | |
4358 | if (parent == NULL || | |
4359 | proc_get_current_thread (parent) != pi->tid) | |
4360 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4361 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4362 | __LINE__); |
c906108c | 4363 | #endif |
c906108c | 4364 | |
c3f6f71d | 4365 | if (parent != NULL) |
c906108c | 4366 | { |
c3f6f71d | 4367 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4368 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4369 | We don't do this to the master (parent) procinfo. */ |
4370 | ||
4371 | close_procinfo_files (pi); | |
c906108c | 4372 | } |
c3f6f71d JM |
4373 | pi->gregs_valid = 0; |
4374 | pi->fpregs_valid = 0; | |
4375 | #if 0 | |
4376 | pi->gregs_dirty = 0; | |
4377 | pi->fpregs_dirty = 0; | |
c906108c | 4378 | #endif |
c3f6f71d JM |
4379 | pi->status_valid = 0; |
4380 | pi->threads_valid = 0; | |
c906108c | 4381 | |
c3f6f71d | 4382 | return 0; |
c906108c SS |
4383 | } |
4384 | ||
0fda6bd2 | 4385 | #if 0 |
c906108c | 4386 | /* |
c3f6f71d JM |
4387 | * Function: make_signal_thread_runnable |
4388 | * | |
4389 | * A callback function for iterate_over_threads. | |
4390 | * Find the asynchronous signal thread, and make it runnable. | |
4391 | * See if that helps matters any. | |
c906108c SS |
4392 | */ |
4393 | ||
c3f6f71d | 4394 | static int |
fba45db2 | 4395 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4396 | { |
c3f6f71d JM |
4397 | #ifdef PR_ASLWP |
4398 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4399 | { |
c3f6f71d JM |
4400 | if (!proc_run_process (pi, 0, -1)) |
4401 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4402 | return 1; | |
c906108c | 4403 | } |
c906108c | 4404 | #endif |
c3f6f71d | 4405 | return 0; |
c906108c | 4406 | } |
0fda6bd2 | 4407 | #endif |
c906108c SS |
4408 | |
4409 | /* | |
c3f6f71d JM |
4410 | * Function: target_resume |
4411 | * | |
4412 | * Make the child process runnable. Normally we will then call | |
4413 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4414 | * | |
4415 | * Arguments: | |
19958708 | 4416 | * step: if true, then arrange for the child to stop again |
c3f6f71d JM |
4417 | * after executing a single instruction. |
4418 | * signo: if zero, then cancel any pending signal. | |
19958708 | 4419 | * If non-zero, then arrange for the indicated signal |
c3f6f71d JM |
4420 | * to be delivered to the child when it runs. |
4421 | * pid: if -1, then allow any child thread to run. | |
4422 | * if non-zero, then allow only the indicated thread to run. | |
4423 | ******* (not implemented yet) | |
c906108c SS |
4424 | */ |
4425 | ||
4426 | static void | |
39f77062 | 4427 | procfs_resume (ptid_t ptid, int step, enum target_signal signo) |
c906108c | 4428 | { |
c3f6f71d JM |
4429 | procinfo *pi, *thread; |
4430 | int native_signo; | |
4431 | ||
19958708 | 4432 | /* 2.1: |
c3f6f71d | 4433 | prrun.prflags |= PRSVADDR; |
19958708 | 4434 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4435 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4436 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4437 | prrun.prflags |= PRCFAULT; clear current fault. |
4438 | ||
4439 | PRSTRACE and PRSFAULT can be done by other means | |
4440 | (proc_trace_signals, proc_trace_faults) | |
4441 | PRSVADDR is unnecessary. | |
4442 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4443 | This basically leaves PRSTEP and PRCSIG. | |
4444 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4445 | So basically PR_STEP is the sole argument that must be passed | |
4446 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4447 | ||
4448 | /* Find procinfo for main process */ | |
39f77062 | 4449 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4450 | |
4451 | /* First cut: ignore pid argument */ | |
4452 | errno = 0; | |
c906108c | 4453 | |
c3f6f71d JM |
4454 | /* Convert signal to host numbering. */ |
4455 | if (signo == 0 || | |
0fda6bd2 | 4456 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4457 | native_signo = 0; |
4458 | else | |
4459 | native_signo = target_signal_to_host (signo); | |
c906108c | 4460 | |
c3f6f71d | 4461 | pi->ignore_next_sigstop = 0; |
c906108c | 4462 | |
c3f6f71d JM |
4463 | /* Running the process voids all cached registers and status. */ |
4464 | /* Void the threads' caches first */ | |
19958708 | 4465 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4466 | /* Void the process procinfo's caches. */ |
4467 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4468 | |
39f77062 | 4469 | if (PIDGET (ptid) != -1) |
c906108c | 4470 | { |
c3f6f71d | 4471 | /* Resume a specific thread, presumably suppressing the others. */ |
39f77062 | 4472 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4473 | if (thread != NULL) |
c906108c | 4474 | { |
c3f6f71d JM |
4475 | if (thread->tid != 0) |
4476 | { | |
4477 | /* We're to resume a specific thread, and not the others. | |
4478 | * Set the child process's PR_ASYNC flag. | |
4479 | */ | |
4480 | #ifdef PR_ASYNC | |
4481 | if (!proc_set_async (pi)) | |
4482 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4483 | #endif | |
4484 | #if 0 | |
19958708 | 4485 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4486 | make_signal_thread_runnable, |
4487 | NULL); | |
4488 | #endif | |
4489 | pi = thread; /* substitute the thread's procinfo for run */ | |
4490 | } | |
c906108c SS |
4491 | } |
4492 | } | |
c906108c | 4493 | |
c3f6f71d | 4494 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4495 | { |
c3f6f71d JM |
4496 | if (errno == EBUSY) |
4497 | warning ("resume: target already running. Pretend to resume, and hope for the best!\n"); | |
4498 | else | |
4499 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4500 | } |
c3f6f71d | 4501 | } |
c906108c | 4502 | |
c3f6f71d JM |
4503 | /* |
4504 | * Function: register_gdb_signals | |
4505 | * | |
19958708 | 4506 | * Traverse the list of signals that GDB knows about |
c3f6f71d JM |
4507 | * (see "handle" command), and arrange for the target |
4508 | * to be stopped or not, according to these settings. | |
4509 | * | |
4510 | * Returns non-zero for success, zero for failure. | |
4511 | */ | |
c906108c | 4512 | |
c3f6f71d | 4513 | static int |
37de36c6 | 4514 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4515 | { |
4516 | int signo; | |
c906108c | 4517 | |
c3f6f71d JM |
4518 | for (signo = 0; signo < NSIG; signo ++) |
4519 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4520 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4521 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
4522 | prdelset (signals, signo); | |
4523 | else | |
4524 | praddset (signals, signo); | |
c906108c | 4525 | |
c3f6f71d | 4526 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4527 | } |
4528 | ||
4529 | /* | |
c3f6f71d JM |
4530 | * Function: target_notice_signals |
4531 | * | |
4532 | * Set up to trace signals in the child process. | |
4533 | */ | |
c906108c | 4534 | |
c3f6f71d | 4535 | static void |
39f77062 | 4536 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4537 | { |
37de36c6 | 4538 | gdb_sigset_t signals; |
39f77062 | 4539 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4540 | |
c3f6f71d JM |
4541 | if (proc_get_traced_signals (pi, &signals) && |
4542 | register_gdb_signals (pi, &signals)) | |
4543 | return; | |
4544 | else | |
4545 | proc_error (pi, "notice_signals", __LINE__); | |
4546 | } | |
c906108c | 4547 | |
c3f6f71d JM |
4548 | /* |
4549 | * Function: target_files_info | |
4550 | * | |
4551 | * Print status information about the child process. | |
4552 | */ | |
c906108c | 4553 | |
c3f6f71d | 4554 | static void |
fba45db2 | 4555 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d JM |
4556 | { |
4557 | printf_filtered ("\tUsing the running image of %s %s via /proc.\n", | |
19958708 | 4558 | attach_flag? "attached": "child", |
39f77062 | 4559 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4560 | } |
c906108c | 4561 | |
c3f6f71d JM |
4562 | /* |
4563 | * Function: target_open | |
4564 | * | |
4565 | * A dummy: you don't open procfs. | |
c906108c SS |
4566 | */ |
4567 | ||
4568 | static void | |
fba45db2 | 4569 | procfs_open (char *args, int from_tty) |
c906108c | 4570 | { |
c3f6f71d JM |
4571 | error ("Use the \"run\" command to start a Unix child process."); |
4572 | } | |
c906108c | 4573 | |
c3f6f71d JM |
4574 | /* |
4575 | * Function: target_can_run | |
4576 | * | |
19958708 | 4577 | * This tells GDB that this target vector can be invoked |
c3f6f71d JM |
4578 | * for "run" or "attach". |
4579 | */ | |
c906108c | 4580 | |
c3f6f71d JM |
4581 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
4582 | be a runnable target. Used by targets | |
4583 | that can sit atop procfs, such as solaris | |
4584 | thread support. */ | |
c906108c | 4585 | |
c906108c | 4586 | |
c3f6f71d | 4587 | static int |
fba45db2 | 4588 | procfs_can_run (void) |
c3f6f71d JM |
4589 | { |
4590 | /* This variable is controlled by modules that sit atop procfs that | |
4591 | may layer their own process structure atop that provided here. | |
4592 | sol-thread.c does this because of the Solaris two-level thread | |
4593 | model. */ | |
19958708 | 4594 | |
c3f6f71d | 4595 | /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */ |
c906108c | 4596 | |
c3f6f71d JM |
4597 | return !procfs_suppress_run; |
4598 | } | |
c906108c | 4599 | |
c3f6f71d JM |
4600 | /* |
4601 | * Function: target_stop | |
4602 | * | |
4603 | * Stop the child process asynchronously, as when the | |
4604 | * gdb user types control-c or presses a "stop" button. | |
4605 | * | |
4606 | * Works by sending kill(SIGINT) to the child's process group. | |
4607 | */ | |
c906108c | 4608 | |
c3f6f71d | 4609 | static void |
fba45db2 | 4610 | procfs_stop (void) |
c3f6f71d | 4611 | { |
c3f6f71d | 4612 | kill (-inferior_process_group, SIGINT); |
c906108c SS |
4613 | } |
4614 | ||
c906108c | 4615 | /* |
c3f6f71d JM |
4616 | * Function: unconditionally_kill_inferior |
4617 | * | |
4618 | * Make it die. Wait for it to die. Clean up after it. | |
19958708 | 4619 | * Note: this should only be applied to the real process, |
c3f6f71d JM |
4620 | * not to an LWP, because of the check for parent-process. |
4621 | * If we need this to work for an LWP, it needs some more logic. | |
4622 | */ | |
c906108c | 4623 | |
c3f6f71d | 4624 | static void |
fba45db2 | 4625 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4626 | { |
4627 | int parent_pid; | |
c906108c | 4628 | |
c3f6f71d JM |
4629 | parent_pid = proc_parent_pid (pi); |
4630 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4631 | /* FIXME: use access functions */ | |
4632 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4633 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4634 | file for the inferior. */ | |
4635 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4636 | { | |
4637 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4638 | } | |
4639 | #endif | |
4640 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4641 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4642 | to kill the inferior, otherwise it might remain stopped with a | |
4643 | pending SIGKILL. | |
4644 | We do not check the result of the PIOCSSIG, the inferior might have | |
4645 | died already. */ | |
4646 | { | |
37de36c6 | 4647 | gdb_siginfo_t newsiginfo; |
c906108c | 4648 | |
c3f6f71d JM |
4649 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4650 | newsiginfo.si_signo = SIGKILL; | |
4651 | newsiginfo.si_code = 0; | |
4652 | newsiginfo.si_errno = 0; | |
4653 | newsiginfo.si_pid = getpid (); | |
4654 | newsiginfo.si_uid = getuid (); | |
4655 | /* FIXME: use proc_set_current_signal */ | |
4656 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4657 | } | |
4658 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4659 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4660 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4661 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4662 | destroy_procinfo (pi); | |
c906108c | 4663 | |
c3f6f71d JM |
4664 | /* If pi is GDB's child, wait for it to die. */ |
4665 | if (parent_pid == getpid ()) | |
19958708 | 4666 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4667 | Should we check the returned event? */ |
4668 | { | |
0d06e24b | 4669 | #if 0 |
c3f6f71d | 4670 | int status, ret; |
c906108c | 4671 | |
c3f6f71d JM |
4672 | ret = waitpid (pi->pid, &status, 0); |
4673 | #else | |
4674 | wait (NULL); | |
4675 | #endif | |
4676 | } | |
4677 | } | |
c906108c | 4678 | |
c3f6f71d JM |
4679 | /* |
4680 | * Function: target_kill_inferior | |
4681 | * | |
4682 | * We're done debugging it, and we want it to go away. | |
4683 | * Then we want GDB to forget all about it. | |
c906108c SS |
4684 | */ |
4685 | ||
19958708 | 4686 | static void |
fba45db2 | 4687 | procfs_kill_inferior (void) |
c906108c | 4688 | { |
39f77062 | 4689 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4690 | { |
4691 | /* Find procinfo for main process */ | |
39f77062 | 4692 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4693 | |
c3f6f71d JM |
4694 | if (pi) |
4695 | unconditionally_kill_inferior (pi); | |
4696 | target_mourn_inferior (); | |
c906108c | 4697 | } |
c3f6f71d JM |
4698 | } |
4699 | ||
4700 | /* | |
4701 | * Function: target_mourn_inferior | |
4702 | * | |
4703 | * Forget we ever debugged this thing! | |
4704 | */ | |
c906108c | 4705 | |
19958708 | 4706 | static void |
fba45db2 | 4707 | procfs_mourn_inferior (void) |
c3f6f71d JM |
4708 | { |
4709 | procinfo *pi; | |
c906108c | 4710 | |
39f77062 | 4711 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4712 | { |
4713 | /* Find procinfo for main process */ | |
39f77062 | 4714 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4715 | if (pi) |
4716 | destroy_procinfo (pi); | |
c906108c | 4717 | } |
c3f6f71d JM |
4718 | unpush_target (&procfs_ops); |
4719 | generic_mourn_inferior (); | |
4720 | } | |
c906108c | 4721 | |
c3f6f71d JM |
4722 | /* |
4723 | * Function: init_inferior | |
4724 | * | |
19958708 | 4725 | * When GDB forks to create a runnable inferior process, |
c3f6f71d JM |
4726 | * this function is called on the parent side of the fork. |
4727 | * It's job is to do whatever is necessary to make the child | |
4728 | * ready to be debugged, and then wait for the child to synchronize. | |
4729 | */ | |
c906108c | 4730 | |
19958708 | 4731 | static void |
fba45db2 | 4732 | procfs_init_inferior (int pid) |
c3f6f71d JM |
4733 | { |
4734 | procinfo *pi; | |
37de36c6 | 4735 | gdb_sigset_t signals; |
c3f6f71d | 4736 | int fail; |
c906108c | 4737 | |
c3f6f71d JM |
4738 | /* This routine called on the parent side (GDB side) |
4739 | after GDB forks the inferior. */ | |
c906108c | 4740 | |
c3f6f71d | 4741 | push_target (&procfs_ops); |
c906108c | 4742 | |
c3f6f71d JM |
4743 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4744 | perror ("procfs: out of memory in 'init_inferior'"); | |
4745 | ||
4746 | if (!open_procinfo_files (pi, FD_CTL)) | |
4747 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4748 | ||
4749 | /* | |
4750 | xmalloc // done | |
4751 | open_procinfo_files // done | |
4752 | link list // done | |
4753 | prfillset (trace) | |
4754 | procfs_notice_signals | |
4755 | prfillset (fault) | |
4756 | prdelset (FLTPAGE) | |
4757 | PIOCWSTOP | |
4758 | PIOCSFAULT | |
4759 | */ | |
4760 | ||
4761 | /* If not stopped yet, wait for it to stop. */ | |
4762 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4763 | !(proc_wait_for_stop (pi))) | |
4764 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4765 | ||
4766 | /* Save some of the /proc state to be restored if we detach. */ | |
4767 | /* FIXME: Why? In case another debugger was debugging it? | |
4768 | We're it's parent, for Ghu's sake! */ | |
4769 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4770 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4771 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4772 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4773 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4774 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4775 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4776 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4777 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4778 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4779 | ||
4780 | /* Register to trace selected signals in the child. */ | |
4781 | prfillset (&signals); | |
4782 | if (!register_gdb_signals (pi, &signals)) | |
4783 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4784 | ||
4785 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4786 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4787 | ||
0d06e24b JM |
4788 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4789 | and possibly even turning ON kill-on-last-close at this point. But | |
4790 | I can't make that change without careful testing which I don't have | |
4791 | time to do right now... */ | |
c3f6f71d JM |
4792 | /* Turn on run-on-last-close flag so that the child |
4793 | will die if GDB goes away for some reason. */ | |
4794 | if (!proc_set_run_on_last_close (pi)) | |
4795 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4796 | ||
4797 | /* The 'process ID' we return to GDB is composed of | |
4798 | the actual process ID plus the lwp ID. */ | |
39f77062 | 4799 | inferior_ptid = MERGEPID (pi->pid, proc_get_current_thread (pi)); |
c906108c | 4800 | |
c3f6f71d JM |
4801 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
4802 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
4803 | #else | |
4804 | /* One trap to exec the shell, one to exec the program being debugged. */ | |
4805 | startup_inferior (2); | |
0d06e24b | 4806 | #endif /* START_INFERIOR_TRAPS_EXPECTED */ |
c3f6f71d | 4807 | } |
c906108c | 4808 | |
c3f6f71d JM |
4809 | /* |
4810 | * Function: set_exec_trap | |
4811 | * | |
4812 | * When GDB forks to create a new process, this function is called | |
4813 | * on the child side of the fork before GDB exec's the user program. | |
4814 | * Its job is to make the child minimally debuggable, so that the | |
4815 | * parent GDB process can connect to the child and take over. | |
4816 | * This function should do only the minimum to make that possible, | |
4817 | * and to synchronize with the parent process. The parent process | |
4818 | * should take care of the details. | |
4819 | */ | |
4820 | ||
4821 | static void | |
fba45db2 | 4822 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4823 | { |
4824 | /* This routine called on the child side (inferior side) | |
4825 | after GDB forks the inferior. It must use only local variables, | |
4826 | because it may be sharing data space with its parent. */ | |
c906108c | 4827 | |
c3f6f71d | 4828 | procinfo *pi; |
37de36c6 | 4829 | sysset_t *exitset; |
c906108c | 4830 | |
c3f6f71d JM |
4831 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
4832 | perror_with_name ("procfs: create_procinfo failed in child."); | |
c906108c | 4833 | |
c3f6f71d JM |
4834 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4835 | { | |
4836 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4837 | gdb_flush (gdb_stderr); | |
4838 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
4839 | _exit (127); | |
4840 | } | |
c906108c | 4841 | |
c3f6f71d JM |
4842 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4843 | /* OSF method for tracing exec syscalls. Quoting: | |
4844 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4845 | exits from exec system calls because of the user level loader. */ | |
4846 | /* FIXME: make nice and maybe move into an access function. */ | |
4847 | { | |
4848 | int prfs_flags; | |
c906108c | 4849 | |
c3f6f71d JM |
4850 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4851 | { | |
4852 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4853 | gdb_flush (gdb_stderr); | |
4854 | _exit (127); | |
4855 | } | |
4856 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4857 | |
c3f6f71d JM |
4858 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4859 | { | |
4860 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4861 | gdb_flush (gdb_stderr); | |
4862 | _exit (127); | |
4863 | } | |
4864 | } | |
4865 | #else /* not PRFS_STOPEXEC */ | |
4866 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
4867 | /* GW: Rationale... | |
4868 | Not all systems with /proc have all the exec* syscalls with the same | |
4869 | names. On the SGI, for example, there is no SYS_exec, but there | |
4870 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 4871 | |
37de36c6 KB |
4872 | exitset = sysset_t_alloc (pi); |
4873 | gdb_premptysysset (exitset); | |
c3f6f71d | 4874 | #ifdef SYS_exec |
37de36c6 | 4875 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4876 | #endif |
4877 | #ifdef SYS_execve | |
37de36c6 | 4878 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4879 | #endif |
4880 | #ifdef SYS_execv | |
37de36c6 | 4881 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4882 | #endif |
37de36c6 KB |
4883 | #ifdef DYNAMIC_SYSCALLS |
4884 | { | |
4885 | int callnum = find_syscall (pi, "execve"); | |
4886 | ||
4887 | if (callnum >= 0) | |
4888 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4889 | |
37de36c6 KB |
4890 | callnum = find_syscall (pi, "ra_execve"); |
4891 | if (callnum >= 0) | |
4892 | gdb_praddsysset (exitset, callnum); | |
4893 | } | |
4894 | #endif /* DYNAMIC_SYSCALLS */ | |
4895 | ||
4896 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4897 | { |
c3f6f71d JM |
4898 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4899 | gdb_flush (gdb_stderr); | |
4900 | _exit (127); | |
c906108c | 4901 | } |
c3f6f71d JM |
4902 | #endif /* PRFS_STOPEXEC */ |
4903 | ||
4904 | /* FIXME: should this be done in the parent instead? */ | |
4905 | /* Turn off inherit on fork flag so that all grand-children | |
4906 | of gdb start with tracing flags cleared. */ | |
4907 | if (!proc_unset_inherit_on_fork (pi)) | |
4908 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4909 | ||
4910 | /* Turn off run on last close flag, so that the child process | |
4911 | cannot run away just because we close our handle on it. | |
4912 | We want it to wait for the parent to attach. */ | |
4913 | if (!proc_unset_run_on_last_close (pi)) | |
4914 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4915 | ||
19958708 | 4916 | /* FIXME: No need to destroy the procinfo -- |
c3f6f71d JM |
4917 | we have our own address space, and we're about to do an exec! */ |
4918 | /*destroy_procinfo (pi);*/ | |
c906108c | 4919 | } |
c906108c | 4920 | |
c3f6f71d JM |
4921 | /* |
4922 | * Function: create_inferior | |
4923 | * | |
4924 | * This function is called BEFORE gdb forks the inferior process. | |
19958708 | 4925 | * Its only real responsibility is to set things up for the fork, |
c3f6f71d JM |
4926 | * and tell GDB which two functions to call after the fork (one |
4927 | * for the parent, and one for the child). | |
19958708 | 4928 | * |
c3f6f71d JM |
4929 | * This function does a complicated search for a unix shell program, |
4930 | * which it then uses to parse arguments and environment variables | |
4931 | * to be sent to the child. I wonder whether this code could not | |
4932 | * be abstracted out and shared with other unix targets such as | |
4933 | * infptrace? | |
4934 | */ | |
c906108c SS |
4935 | |
4936 | static void | |
fba45db2 | 4937 | procfs_create_inferior (char *exec_file, char *allargs, char **env) |
c906108c SS |
4938 | { |
4939 | char *shell_file = getenv ("SHELL"); | |
4940 | char *tryname; | |
4941 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) | |
4942 | { | |
4943 | ||
4944 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4945 | just do this the normal way (via execlp, which operates by |
4946 | attempting an exec for each element of the PATH until it | |
4947 | finds one which succeeds), then there will be an exec for | |
4948 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4949 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4950 | for these failed execs with the ones for successful execs | |
4951 | (whether the exec has succeeded is stored at that time in the | |
4952 | carry bit or some such architecture-specific and | |
4953 | non-ABI-specified place). | |
4954 | ||
4955 | So I can't think of anything better than to search the PATH | |
4956 | now. This has several disadvantages: (1) There is a race | |
4957 | condition; if we find a file now and it is deleted before we | |
4958 | exec it, we lose, even if the deletion leaves a valid file | |
4959 | further down in the PATH, (2) there is no way to know exactly | |
4960 | what an executable (in the sense of "capable of being | |
4961 | exec'd") file is. Using access() loses because it may lose | |
4962 | if the caller is the superuser; failing to use it loses if | |
4963 | there are ACLs or some such. */ | |
c906108c SS |
4964 | |
4965 | char *p; | |
4966 | char *p1; | |
4967 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4968 | path is used from within GDB. */ |
c906108c SS |
4969 | char *path = getenv ("PATH"); |
4970 | int len; | |
4971 | struct stat statbuf; | |
4972 | ||
4973 | if (path == NULL) | |
4974 | path = "/bin:/usr/bin"; | |
4975 | ||
4976 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4977 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4978 | { |
4979 | p1 = strchr (p, ':'); | |
4980 | if (p1 != NULL) | |
4981 | len = p1 - p; | |
4982 | else | |
4983 | len = strlen (p); | |
4984 | strncpy (tryname, p, len); | |
4985 | tryname[len] = '\0'; | |
4986 | strcat (tryname, "/"); | |
4987 | strcat (tryname, shell_file); | |
4988 | if (access (tryname, X_OK) < 0) | |
4989 | continue; | |
4990 | if (stat (tryname, &statbuf) < 0) | |
4991 | continue; | |
4992 | if (!S_ISREG (statbuf.st_mode)) | |
4993 | /* We certainly need to reject directories. I'm not quite | |
4994 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4995 | that people want to exec() these things. */ | |
4996 | continue; | |
4997 | break; | |
4998 | } | |
4999 | if (p == NULL) | |
5000 | /* Not found. This must be an error rather than merely passing | |
5001 | the file to execlp(), because execlp() would try all the | |
5002 | exec()s, causing GDB to get confused. */ | |
c3f6f71d JM |
5003 | error ("procfs:%d -- Can't find shell %s in PATH", |
5004 | __LINE__, shell_file); | |
c906108c SS |
5005 | |
5006 | shell_file = tryname; | |
5007 | } | |
5008 | ||
19958708 | 5009 | fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
c3f6f71d | 5010 | procfs_init_inferior, NULL, shell_file); |
c906108c SS |
5011 | |
5012 | /* We are at the first instruction we care about. */ | |
5013 | /* Pedal to the metal... */ | |
5014 | ||
2acceee2 | 5015 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
5016 | } |
5017 | ||
c3f6f71d JM |
5018 | /* |
5019 | * Function: notice_thread | |
5020 | * | |
5021 | * Callback for find_new_threads. | |
5022 | * Calls "add_thread". | |
5023 | */ | |
c906108c | 5024 | |
c3f6f71d | 5025 | static int |
fba45db2 | 5026 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5027 | { |
39f77062 | 5028 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5029 | |
c3f6f71d JM |
5030 | if (!in_thread_list (gdb_threadid)) |
5031 | add_thread (gdb_threadid); | |
c906108c | 5032 | |
c3f6f71d JM |
5033 | return 0; |
5034 | } | |
5035 | ||
5036 | /* | |
5037 | * Function: target_find_new_threads | |
5038 | * | |
19958708 | 5039 | * Query all the threads that the target knows about, |
c3f6f71d JM |
5040 | * and give them back to GDB to add to its list. |
5041 | */ | |
5042 | ||
5043 | void | |
fba45db2 | 5044 | procfs_find_new_threads (void) |
c3f6f71d JM |
5045 | { |
5046 | procinfo *pi; | |
5047 | ||
5048 | /* Find procinfo for main process */ | |
39f77062 | 5049 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5050 | proc_update_threads (pi); |
5051 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5052 | } |
5053 | ||
19958708 | 5054 | /* |
c3f6f71d JM |
5055 | * Function: target_thread_alive |
5056 | * | |
5057 | * Return true if the thread is still 'alive'. | |
5058 | * | |
5059 | * This guy doesn't really seem to be doing his job. | |
5060 | * Got to investigate how to tell when a thread is really gone. | |
5061 | */ | |
c906108c | 5062 | |
c906108c | 5063 | static int |
39f77062 | 5064 | procfs_thread_alive (ptid_t ptid) |
c906108c | 5065 | { |
c3f6f71d JM |
5066 | int proc, thread; |
5067 | procinfo *pi; | |
c906108c | 5068 | |
39f77062 KB |
5069 | proc = PIDGET (ptid); |
5070 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5071 | /* If I don't know it, it ain't alive! */ |
5072 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5073 | return 0; | |
5074 | ||
5075 | /* If I can't get its status, it ain't alive! | |
5076 | What's more, I need to forget about it! */ | |
5077 | if (!proc_get_status (pi)) | |
5078 | { | |
5079 | destroy_procinfo (pi); | |
5080 | return 0; | |
5081 | } | |
5082 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5083 | return 1; | |
c906108c | 5084 | } |
c3f6f71d JM |
5085 | |
5086 | /* | |
5087 | * Function: target_pid_to_str | |
5088 | * | |
19958708 | 5089 | * Return a string to be used to identify the thread in |
c3f6f71d JM |
5090 | * the "info threads" display. |
5091 | */ | |
5092 | ||
5093 | char * | |
39f77062 | 5094 | procfs_pid_to_str (ptid_t ptid) |
c3f6f71d JM |
5095 | { |
5096 | static char buf[80]; | |
5097 | int proc, thread; | |
5098 | procinfo *pi; | |
5099 | ||
39f77062 KB |
5100 | proc = PIDGET (ptid); |
5101 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5102 | pi = find_procinfo (proc, thread); |
5103 | ||
5104 | if (thread == 0) | |
5105 | sprintf (buf, "Process %d", proc); | |
5106 | else | |
5107 | sprintf (buf, "LWP %d", thread); | |
5108 | return &buf[0]; | |
5109 | } | |
5110 | ||
5111 | /* | |
5112 | * Function: procfs_set_watchpoint | |
5113 | * Insert a watchpoint | |
5114 | */ | |
5115 | ||
19958708 | 5116 | int |
39f77062 KB |
5117 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
5118 | int after) | |
c906108c | 5119 | { |
c3f6f71d | 5120 | #ifndef UNIXWARE |
37de36c6 | 5121 | #ifndef AIX5 |
c3f6f71d | 5122 | int pflags = 0; |
19958708 | 5123 | procinfo *pi; |
c3f6f71d | 5124 | |
19958708 | 5125 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5126 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d JM |
5127 | |
5128 | /* Translate from GDB's flags to /proc's */ | |
5129 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5130 | { |
c3f6f71d JM |
5131 | switch (rwflag) { /* FIXME: need an enum! */ |
5132 | case hw_write: /* default watchpoint (write) */ | |
5133 | pflags = WRITE_WATCHFLAG; | |
5134 | break; | |
5135 | case hw_read: /* read watchpoint */ | |
5136 | pflags = READ_WATCHFLAG; | |
5137 | break; | |
5138 | case hw_access: /* access watchpoint */ | |
5139 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5140 | break; | |
5141 | case hw_execute: /* execution HW breakpoint */ | |
5142 | pflags = EXEC_WATCHFLAG; | |
5143 | break; | |
5144 | default: /* Something weird. Return error. */ | |
c906108c | 5145 | return -1; |
c3f6f71d JM |
5146 | } |
5147 | if (after) /* Stop after r/w access is completed. */ | |
5148 | pflags |= AFTER_WATCHFLAG; | |
5149 | } | |
5150 | ||
5151 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5152 | { | |
5153 | if (errno == E2BIG) /* Typical error for no resources */ | |
5154 | return -1; /* fail */ | |
5155 | /* GDB may try to remove the same watchpoint twice. | |
5156 | If a remove request returns no match, don't error. */ | |
c906108c | 5157 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5158 | return 0; /* ignore */ |
5159 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5160 | } |
37de36c6 KB |
5161 | #endif /* AIX5 */ |
5162 | #endif /* UNIXWARE */ | |
c906108c SS |
5163 | return 0; |
5164 | } | |
5165 | ||
1e03ad20 KB |
5166 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5167 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5168 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5169 | far. | |
19958708 | 5170 | |
1e03ad20 KB |
5171 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5172 | procfs.c targets due to the fact that some of them still define | |
5173 | TARGET_CAN_USE_HARDWARE_WATCHPOINT. */ | |
5174 | ||
5175 | static int | |
5176 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5177 | { | |
5178 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS | |
5179 | return 0; | |
5180 | #else | |
5181 | /* Due to the way that proc_set_watchpoint() is implemented, host | |
5182 | and target pointers must be of the same size. If they are not, | |
5183 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5184 | fact that proc_set_watchpoint() calls |
5185 | procfs_address_to_host_pointer(); a close inspection of | |
5186 | procfs_address_to_host_pointer will reveal that an internal error | |
5187 | will be generated when the host and target pointer sizes are | |
5188 | different. */ | |
1e03ad20 KB |
5189 | if (sizeof (void *) != TYPE_LENGTH (builtin_type_void_data_ptr)) |
5190 | return 0; | |
5191 | ||
5192 | /* Other tests here??? */ | |
5193 | ||
5194 | return 1; | |
5195 | #endif | |
5196 | } | |
5197 | ||
c3f6f71d JM |
5198 | /* |
5199 | * Function: stopped_by_watchpoint | |
5200 | * | |
5201 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5202 | * else returns zero. | |
5203 | */ | |
5204 | ||
c906108c | 5205 | int |
39f77062 | 5206 | procfs_stopped_by_watchpoint (ptid_t ptid) |
c906108c | 5207 | { |
c3f6f71d | 5208 | procinfo *pi; |
c906108c | 5209 | |
19958708 | 5210 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5211 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
aaeb7efa MS |
5212 | |
5213 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5214 | return 0; | |
5215 | ||
c3f6f71d | 5216 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5217 | { |
c3f6f71d | 5218 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5219 | { |
c906108c | 5220 | #ifdef FLTWATCH |
c3f6f71d JM |
5221 | if (proc_what (pi) == FLTWATCH) |
5222 | return 1; | |
c906108c SS |
5223 | #endif |
5224 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5225 | if (proc_what (pi) == FLTKWATCH) |
5226 | return 1; | |
c906108c | 5227 | #endif |
c3f6f71d | 5228 | } |
c906108c SS |
5229 | } |
5230 | return 0; | |
5231 | } | |
c906108c | 5232 | |
c3f6f71d JM |
5233 | #ifdef TM_I386SOL2_H |
5234 | /* | |
19958708 | 5235 | * Function: procfs_find_LDT_entry |
c3f6f71d JM |
5236 | * |
5237 | * Input: | |
39f77062 | 5238 | * ptid_t ptid; // The GDB-style pid-plus-LWP. |
c3f6f71d JM |
5239 | * |
5240 | * Return: | |
5241 | * pointer to the corresponding LDT entry. | |
5242 | */ | |
c906108c | 5243 | |
c3f6f71d | 5244 | struct ssd * |
39f77062 | 5245 | procfs_find_LDT_entry (ptid_t ptid) |
c906108c | 5246 | { |
c3f6f71d JM |
5247 | gdb_gregset_t *gregs; |
5248 | int key; | |
5249 | procinfo *pi; | |
c906108c | 5250 | |
c3f6f71d | 5251 | /* Find procinfo for the lwp. */ |
39f77062 | 5252 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) |
c906108c | 5253 | { |
39f77062 KB |
5254 | warning ("procfs_find_LDT_entry: could not find procinfo for %d:%d.", |
5255 | PIDGET (ptid), TIDGET (ptid)); | |
c3f6f71d | 5256 | return NULL; |
c906108c | 5257 | } |
c3f6f71d JM |
5258 | /* get its general registers. */ |
5259 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
5260 | { | |
39f77062 KB |
5261 | warning ("procfs_find_LDT_entry: could not read gregs for %d:%d.", |
5262 | PIDGET (ptid), TIDGET (ptid)); | |
c3f6f71d JM |
5263 | return NULL; |
5264 | } | |
5265 | /* Now extract the GS register's lower 16 bits. */ | |
5266 | key = (*gregs)[GS] & 0xffff; | |
5267 | ||
5268 | /* Find the matching entry and return it. */ | |
5269 | return proc_get_LDT_entry (pi, key); | |
c906108c | 5270 | } |
c3f6f71d | 5271 | #endif /* TM_I386SOL2_H */ |
c906108c | 5272 | |
831e682e MS |
5273 | /* |
5274 | * Memory Mappings Functions: | |
5275 | */ | |
5276 | ||
19958708 | 5277 | /* |
831e682e MS |
5278 | * Function: iterate_over_mappings |
5279 | * | |
5280 | * Call a callback function once for each mapping, passing it the mapping, | |
5281 | * an optional secondary callback function, and some optional opaque data. | |
5282 | * Quit and return the first non-zero value returned from the callback. | |
5283 | * | |
5284 | * Arguments: | |
5285 | * pi -- procinfo struct for the process to be mapped. | |
5286 | * func -- callback function to be called by this iterator. | |
5287 | * data -- optional opaque data to be passed to the callback function. | |
5288 | * child_func -- optional secondary function pointer to be passed | |
5289 | * to the child function. | |
5290 | * | |
19958708 | 5291 | * Return: First non-zero return value from the callback function, |
831e682e MS |
5292 | * or zero. |
5293 | */ | |
5294 | ||
5295 | static int | |
19958708 RM |
5296 | iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data, |
5297 | int (*func) (struct prmap *map, | |
5298 | int (*child_func) (), | |
831e682e MS |
5299 | void *data)) |
5300 | { | |
5301 | char pathname[MAX_PROC_NAME_SIZE]; | |
5302 | struct prmap *prmaps; | |
5303 | struct prmap *prmap; | |
5304 | int funcstat; | |
5305 | int map_fd; | |
5306 | int nmap; | |
5307 | #ifdef NEW_PROC_API | |
5308 | struct stat sbuf; | |
5309 | #endif | |
5310 | ||
19958708 | 5311 | /* Get the number of mappings, allocate space, |
831e682e MS |
5312 | and read the mappings into prmaps. */ |
5313 | #ifdef NEW_PROC_API | |
5314 | /* Open map fd. */ | |
5315 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5316 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5317 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5318 | ||
5319 | /* Make sure it gets closed again. */ | |
5320 | make_cleanup_close (map_fd); | |
5321 | ||
19958708 | 5322 | /* Use stat to determine the file size, and compute |
831e682e MS |
5323 | the number of prmap_t objects it contains. */ |
5324 | if (fstat (map_fd, &sbuf) != 0) | |
5325 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5326 | ||
5327 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5328 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5329 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5330 | != (nmap * sizeof (*prmaps))) | |
5331 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5332 | #else | |
5333 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5334 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5335 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5336 | ||
5337 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5338 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5339 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5340 | #endif | |
5341 | ||
5342 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5343 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5344 | return funcstat; | |
5345 | ||
5346 | return 0; | |
5347 | } | |
5348 | ||
5349 | /* | |
5350 | * Function: solib_mappings_callback | |
5351 | * | |
19958708 RM |
5352 | * Calls the supplied callback function once for each mapped address |
5353 | * space in the process. The callback function receives an open | |
5354 | * file descriptor for the file corresponding to that mapped | |
5355 | * address space (if there is one), and the base address of the | |
831e682e MS |
5356 | * mapped space. Quit when the callback function returns a |
5357 | * nonzero value, or at teh end of the mappings. | |
5358 | * | |
5359 | * Returns: the first non-zero return value of the callback function, | |
5360 | * or zero. | |
5361 | */ | |
5362 | ||
19958708 | 5363 | int solib_mappings_callback (struct prmap *map, |
831e682e MS |
5364 | int (*func) (int, CORE_ADDR), |
5365 | void *data) | |
5366 | { | |
5367 | procinfo *pi = data; | |
5368 | int fd; | |
5369 | ||
5370 | #ifdef NEW_PROC_API | |
5371 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
5372 | ||
5373 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
5374 | return -1; /* sanity */ | |
5375 | ||
5376 | if (map->pr_mapname[0] == 0) | |
5377 | { | |
5378 | fd = -1; /* no map file */ | |
5379 | } | |
5380 | else | |
5381 | { | |
5382 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
5383 | /* Note: caller's responsibility to close this fd! */ | |
5384 | fd = open_with_retry (name, O_RDONLY); | |
5385 | /* Note: we don't test the above call for failure; | |
19958708 | 5386 | we just pass the FD on as given. Sometimes there is |
831e682e MS |
5387 | no file, so the open may return failure, but that's |
5388 | not a problem. */ | |
5389 | } | |
5390 | #else | |
5391 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
5392 | /* Note: we don't test the above call for failure; | |
19958708 | 5393 | we just pass the FD on as given. Sometimes there is |
831e682e MS |
5394 | no file, so the ioctl may return failure, but that's |
5395 | not a problem. */ | |
5396 | #endif | |
5397 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
5398 | } | |
5399 | ||
5400 | /* | |
5401 | * Function: proc_iterate_over_mappings | |
5402 | * | |
5403 | * Uses the unified "iterate_over_mappings" function | |
5404 | * to implement the exported interface to solib-svr4.c. | |
5405 | * | |
5406 | * Given a pointer to a function, call that function once for every | |
19958708 | 5407 | * mapped address space in the process. The callback function |
831e682e MS |
5408 | * receives an open file descriptor for the file corresponding to |
5409 | * that mapped address space (if there is one), and the base address | |
5410 | * of the mapped space. Quit when the callback function returns a | |
5411 | * nonzero value, or at teh end of the mappings. | |
5412 | * | |
5413 | * Returns: the first non-zero return value of the callback function, | |
5414 | * or zero. | |
5415 | */ | |
5416 | ||
5417 | int | |
5418 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) | |
5419 | { | |
5420 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5421 | ||
5422 | return iterate_over_mappings (pi, func, pi, solib_mappings_callback); | |
5423 | } | |
5424 | ||
be4d1333 MS |
5425 | /* |
5426 | * Function: find_memory_regions_callback | |
5427 | * | |
5428 | * Implements the to_find_memory_regions method. | |
5429 | * Calls an external function for each memory region. | |
5430 | * External function will have the signiture: | |
5431 | * | |
19958708 RM |
5432 | * int callback (CORE_ADDR vaddr, |
5433 | * unsigned long size, | |
5434 | * int read, int write, int execute, | |
be4d1333 MS |
5435 | * void *data); |
5436 | * | |
5437 | * Returns the integer value returned by the callback. | |
5438 | */ | |
5439 | ||
5440 | static int | |
19958708 RM |
5441 | find_memory_regions_callback (struct prmap *map, |
5442 | int (*func) (CORE_ADDR, | |
5443 | unsigned long, | |
5444 | int, int, int, | |
be4d1333 MS |
5445 | void *), |
5446 | void *data) | |
5447 | { | |
6dbdc4a3 | 5448 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5449 | map->pr_size, |
be4d1333 MS |
5450 | (map->pr_mflags & MA_READ) != 0, |
5451 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5452 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5453 | data); |
5454 | } | |
5455 | ||
5456 | /* | |
5457 | * Function: proc_find_memory_regions | |
5458 | * | |
5459 | * External interface. Calls a callback function once for each | |
5460 | * mapped memory region in the child process, passing as arguments | |
5461 | * CORE_ADDR virtual_address, | |
19958708 | 5462 | * unsigned long size, |
be4d1333 MS |
5463 | * int read, TRUE if region is readable by the child |
5464 | * int write, TRUE if region is writable by the child | |
5465 | * int execute TRUE if region is executable by the child. | |
19958708 | 5466 | * |
be4d1333 MS |
5467 | * Stops iterating and returns the first non-zero value |
5468 | * returned by the callback. | |
5469 | */ | |
5470 | ||
5471 | static int | |
19958708 RM |
5472 | proc_find_memory_regions (int (*func) (CORE_ADDR, |
5473 | unsigned long, | |
5474 | int, int, int, | |
5475 | void *), | |
be4d1333 MS |
5476 | void *data) |
5477 | { | |
5478 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5479 | ||
19958708 | 5480 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5481 | find_memory_regions_callback); |
5482 | } | |
5483 | ||
388faa48 MS |
5484 | /* |
5485 | * Function: mappingflags | |
5486 | * | |
5487 | * Returns an ascii representation of a memory mapping's flags. | |
5488 | */ | |
c3f6f71d | 5489 | |
388faa48 | 5490 | static char * |
5ae5f592 | 5491 | mappingflags (long flags) |
388faa48 MS |
5492 | { |
5493 | static char asciiflags[8]; | |
5494 | ||
5495 | strcpy (asciiflags, "-------"); | |
5496 | #if defined (MA_PHYS) | |
5497 | if (flags & MA_PHYS) | |
5498 | asciiflags[0] = 'd'; | |
5499 | #endif | |
5500 | if (flags & MA_STACK) | |
5501 | asciiflags[1] = 's'; | |
5502 | if (flags & MA_BREAK) | |
5503 | asciiflags[2] = 'b'; | |
5504 | if (flags & MA_SHARED) | |
5505 | asciiflags[3] = 's'; | |
5506 | if (flags & MA_READ) | |
5507 | asciiflags[4] = 'r'; | |
5508 | if (flags & MA_WRITE) | |
5509 | asciiflags[5] = 'w'; | |
5510 | if (flags & MA_EXEC) | |
5511 | asciiflags[6] = 'x'; | |
5512 | return (asciiflags); | |
5513 | } | |
5514 | ||
831e682e MS |
5515 | /* |
5516 | * Function: info_mappings_callback | |
5517 | * | |
5518 | * Callback function, does the actual work for 'info proc mappings'. | |
5519 | */ | |
5520 | ||
831e682e MS |
5521 | static int |
5522 | info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused) | |
5523 | { | |
5524 | char *data_fmt_string; | |
5525 | ||
5526 | if (TARGET_ADDR_BIT == 32) | |
5527 | data_fmt_string = "\t%#10lx %#10lx %#10x %#10x %7s\n"; | |
5528 | else | |
5529 | data_fmt_string = " %#18lx %#18lx %#10x %#10x %7s\n"; | |
5530 | ||
19958708 | 5531 | printf_filtered (data_fmt_string, |
831e682e MS |
5532 | (unsigned long) map->pr_vaddr, |
5533 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
5534 | map->pr_size, | |
5535 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ | |
19958708 | 5536 | (unsigned int) map->pr_offset, |
831e682e MS |
5537 | #else |
5538 | map->pr_off, | |
5539 | #endif | |
5540 | mappingflags (map->pr_mflags)); | |
5541 | ||
5542 | return 0; | |
5543 | } | |
5544 | ||
388faa48 MS |
5545 | /* |
5546 | * Function: info_proc_mappings | |
5547 | * | |
5548 | * Implement the "info proc mappings" subcommand. | |
5549 | */ | |
5550 | ||
5551 | static void | |
5552 | info_proc_mappings (procinfo *pi, int summary) | |
5553 | { | |
831e682e | 5554 | char *header_fmt_string; |
388faa48 MS |
5555 | |
5556 | if (TARGET_PTR_BIT == 32) | |
831e682e | 5557 | header_fmt_string = "\t%10s %10s %10s %10s %7s\n"; |
388faa48 | 5558 | else |
831e682e | 5559 | header_fmt_string = " %18s %18s %10s %10s %7s\n"; |
388faa48 MS |
5560 | |
5561 | if (summary) | |
5562 | return; /* No output for summary mode. */ | |
5563 | ||
388faa48 | 5564 | printf_filtered ("Mapped address spaces:\n\n"); |
19958708 | 5565 | printf_filtered (header_fmt_string, |
388faa48 MS |
5566 | "Start Addr", |
5567 | " End Addr", | |
5568 | " Size", | |
5569 | " Offset", | |
5570 | "Flags"); | |
5571 | ||
831e682e | 5572 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5573 | printf_filtered ("\n"); |
5574 | } | |
5575 | ||
5576 | /* | |
5577 | * Function: info_proc_cmd | |
5578 | * | |
5579 | * Implement the "info proc" command. | |
5580 | */ | |
c3f6f71d JM |
5581 | |
5582 | static void | |
fba45db2 | 5583 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5584 | { |
c3f6f71d | 5585 | struct cleanup *old_chain; |
388faa48 MS |
5586 | procinfo *process = NULL; |
5587 | procinfo *thread = NULL; | |
5588 | char **argv = NULL; | |
5589 | char *tmp = NULL; | |
5590 | int pid = 0; | |
5591 | int tid = 0; | |
5592 | int mappings = 0; | |
c906108c | 5593 | |
c3f6f71d JM |
5594 | old_chain = make_cleanup (null_cleanup, 0); |
5595 | if (args) | |
0fda6bd2 JM |
5596 | { |
5597 | if ((argv = buildargv (args)) == NULL) | |
5598 | nomem (0); | |
5599 | else | |
004527cb | 5600 | make_cleanup_freeargv (argv); |
0fda6bd2 | 5601 | } |
c3f6f71d JM |
5602 | while (argv != NULL && *argv != NULL) |
5603 | { | |
5604 | if (isdigit (argv[0][0])) | |
5605 | { | |
5606 | pid = strtoul (argv[0], &tmp, 10); | |
5607 | if (*tmp == '/') | |
5608 | tid = strtoul (++tmp, NULL, 10); | |
5609 | } | |
5610 | else if (argv[0][0] == '/') | |
5611 | { | |
5612 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5613 | } | |
388faa48 MS |
5614 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5615 | { | |
5616 | mappings = 1; | |
5617 | } | |
c3f6f71d JM |
5618 | else |
5619 | { | |
5620 | /* [...] */ | |
5621 | } | |
5622 | argv++; | |
5623 | } | |
5624 | if (pid == 0) | |
39f77062 | 5625 | pid = PIDGET (inferior_ptid); |
c3f6f71d JM |
5626 | if (pid == 0) |
5627 | error ("No current process: you must name one."); | |
5628 | else | |
c906108c | 5629 | { |
c3f6f71d JM |
5630 | /* Have pid, will travel. |
5631 | First see if it's a process we're already debugging. */ | |
5632 | process = find_procinfo (pid, 0); | |
5633 | if (process == NULL) | |
5634 | { | |
19958708 | 5635 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5636 | remember to close it again when finished. */ |
5637 | process = create_procinfo (pid, 0); | |
004527cb | 5638 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5639 | if (!open_procinfo_files (process, FD_CTL)) |
5640 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5641 | } | |
c906108c | 5642 | } |
c3f6f71d JM |
5643 | if (tid != 0) |
5644 | thread = create_procinfo (pid, tid); | |
5645 | ||
5646 | if (process) | |
5647 | { | |
5648 | printf_filtered ("process %d flags:\n", process->pid); | |
5649 | proc_prettyprint_flags (proc_flags (process), 1); | |
5650 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5651 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5652 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5653 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5654 | proc_get_nthreads (process)); |
5655 | } | |
5656 | if (thread) | |
5657 | { | |
5658 | printf_filtered ("thread %d flags:\n", thread->tid); | |
5659 | proc_prettyprint_flags (proc_flags (thread), 1); | |
5660 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5661 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5662 | } | |
5663 | ||
388faa48 MS |
5664 | if (mappings) |
5665 | { | |
5666 | info_proc_mappings (process, 0); | |
5667 | } | |
5668 | ||
c3f6f71d | 5669 | do_cleanups (old_chain); |
c906108c SS |
5670 | } |
5671 | ||
c3f6f71d | 5672 | static void |
fba45db2 | 5673 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5674 | { |
c3f6f71d JM |
5675 | procinfo *pi; |
5676 | sysset_t *sysset; | |
5677 | int syscallnum = 0; | |
c906108c | 5678 | |
39f77062 | 5679 | if (PIDGET (inferior_ptid) <= 0) |
c3f6f71d | 5680 | error ("you must be debugging a process to use this command."); |
c906108c | 5681 | |
c3f6f71d JM |
5682 | if (args == NULL || args[0] == 0) |
5683 | error_no_arg ("system call to trace"); | |
5684 | ||
39f77062 | 5685 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5686 | if (isdigit (args[0])) |
5687 | { | |
5688 | syscallnum = atoi (args); | |
5689 | if (entry_or_exit == PR_SYSENTRY) | |
5690 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5691 | else | |
5692 | sysset = proc_get_traced_sysexit (pi, NULL); | |
c906108c | 5693 | |
c3f6f71d JM |
5694 | if (sysset == NULL) |
5695 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
c906108c | 5696 | |
c3f6f71d | 5697 | if (mode == FLAG_SET) |
37de36c6 | 5698 | gdb_praddsysset (sysset, syscallnum); |
c3f6f71d | 5699 | else |
37de36c6 | 5700 | gdb_prdelsysset (sysset, syscallnum); |
c906108c | 5701 | |
c3f6f71d JM |
5702 | if (entry_or_exit == PR_SYSENTRY) |
5703 | { | |
5704 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5705 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5706 | } | |
5707 | else | |
5708 | { | |
5709 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5710 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5711 | } | |
5712 | } | |
5713 | } | |
5714 | ||
19958708 | 5715 | static void |
fba45db2 | 5716 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5717 | { |
c3f6f71d JM |
5718 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5719 | } | |
c906108c | 5720 | |
19958708 | 5721 | static void |
fba45db2 | 5722 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5723 | { |
5724 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5725 | } |
c906108c | 5726 | |
19958708 | 5727 | static void |
fba45db2 | 5728 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5729 | { |
5730 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5731 | } | |
5732 | ||
19958708 | 5733 | static void |
fba45db2 | 5734 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5735 | { |
c3f6f71d JM |
5736 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5737 | } | |
c906108c | 5738 | |
c906108c | 5739 | |
c906108c | 5740 | void |
fba45db2 | 5741 | _initialize_procfs (void) |
c906108c | 5742 | { |
c906108c SS |
5743 | init_procfs_ops (); |
5744 | add_target (&procfs_ops); | |
19958708 | 5745 | add_info ("proc", info_proc_cmd, |
388faa48 MS |
5746 | "Show /proc process information about any running process.\n\ |
5747 | Specify process id, or use the program being debugged by default.\n\ | |
5748 | Specify keyword 'mappings' for detailed info on memory mappings."); | |
19958708 | 5749 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
c3f6f71d | 5750 | "Give a trace of entries into the syscall."); |
19958708 | 5751 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
c3f6f71d | 5752 | "Give a trace of exits from the syscall."); |
19958708 | 5753 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
c3f6f71d | 5754 | "Cancel a trace of entries into the syscall."); |
19958708 | 5755 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
c3f6f71d | 5756 | "Cancel a trace of exits from the syscall."); |
c3f6f71d JM |
5757 | } |
5758 | ||
5759 | /* =================== END, GDB "MODULE" =================== */ | |
5760 | ||
5761 | ||
5762 | ||
65554fef | 5763 | /* miscellaneous stubs: */ |
c3f6f71d JM |
5764 | /* The following satisfy a few random symbols mostly created by */ |
5765 | /* the solaris threads implementation, which I will chase down */ | |
5766 | /* later. */ | |
5767 | ||
5768 | /* | |
5769 | * Return a pid for which we guarantee | |
5770 | * we will be able to find a 'live' procinfo. | |
5771 | */ | |
5772 | ||
39f77062 | 5773 | ptid_t |
fba45db2 | 5774 | procfs_first_available (void) |
c3f6f71d | 5775 | { |
39f77062 | 5776 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5777 | } |
be4d1333 MS |
5778 | |
5779 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5780 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5781 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5782 | |
5783 | static char * | |
19958708 | 5784 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
be4d1333 MS |
5785 | char *note_data, int *note_size) |
5786 | { | |
5787 | gdb_gregset_t gregs; | |
5788 | gdb_fpregset_t fpregs; | |
5789 | unsigned long merged_pid; | |
5790 | ||
5791 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5792 | ||
5793 | fill_gregset (&gregs, -1); | |
65554fef MS |
5794 | #if defined (UNIXWARE) |
5795 | note_data = (char *) elfcore_write_lwpstatus (obfd, | |
5796 | note_data, | |
5797 | note_size, | |
19958708 | 5798 | merged_pid, |
65554fef MS |
5799 | stop_signal, |
5800 | &gregs); | |
5801 | #else | |
be4d1333 | 5802 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5803 | note_data, |
5804 | note_size, | |
19958708 | 5805 | merged_pid, |
be4d1333 | 5806 | stop_signal, |
65554fef MS |
5807 | &gregs); |
5808 | #endif | |
be4d1333 MS |
5809 | fill_fpregset (&fpregs, -1); |
5810 | note_data = (char *) elfcore_write_prfpreg (obfd, | |
5811 | note_data, | |
5812 | note_size, | |
5813 | &fpregs, | |
5814 | sizeof (fpregs)); | |
5815 | return note_data; | |
5816 | } | |
5817 | ||
5818 | struct procfs_corefile_thread_data { | |
5819 | bfd *obfd; | |
5820 | char *note_data; | |
5821 | int *note_size; | |
5822 | }; | |
5823 | ||
5824 | static int | |
65554fef | 5825 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5826 | { |
5827 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5828 | |
65554fef | 5829 | if (pi != NULL && thread->tid != 0) |
be4d1333 MS |
5830 | { |
5831 | ptid_t saved_ptid = inferior_ptid; | |
65554fef | 5832 | inferior_ptid = MERGEPID (pi->pid, thread->tid); |
19958708 RM |
5833 | args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid, |
5834 | args->note_data, | |
be4d1333 MS |
5835 | args->note_size); |
5836 | inferior_ptid = saved_ptid; | |
5837 | } | |
5838 | return 0; | |
5839 | } | |
5840 | ||
5841 | static char * | |
5842 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5843 | { | |
5844 | struct cleanup *old_chain; | |
5845 | gdb_gregset_t gregs; | |
5846 | gdb_fpregset_t fpregs; | |
5847 | char fname[16] = {'\0'}; | |
5848 | char psargs[80] = {'\0'}; | |
5849 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5850 | char *note_data = NULL; | |
6dbdc4a3 | 5851 | char *inf_args; |
be4d1333 MS |
5852 | struct procfs_corefile_thread_data thread_args; |
5853 | ||
5854 | if (get_exec_file (0)) | |
5855 | { | |
5856 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
19958708 | 5857 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 5858 | sizeof (psargs)); |
6dbdc4a3 MS |
5859 | |
5860 | inf_args = get_inferior_args (); | |
5861 | if (inf_args && *inf_args && | |
5862 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5863 | { |
19958708 | 5864 | strncat (psargs, " ", |
be4d1333 | 5865 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5866 | strncat (psargs, inf_args, |
be4d1333 MS |
5867 | sizeof (psargs) - strlen (psargs)); |
5868 | } | |
5869 | } | |
5870 | ||
19958708 RM |
5871 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5872 | note_data, | |
5873 | note_size, | |
5874 | fname, | |
be4d1333 MS |
5875 | psargs); |
5876 | ||
65554fef MS |
5877 | #ifdef UNIXWARE |
5878 | fill_gregset (&gregs, -1); | |
19958708 RM |
5879 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
5880 | PIDGET (inferior_ptid), | |
65554fef MS |
5881 | stop_signal, &gregs); |
5882 | #endif | |
5883 | ||
be4d1333 MS |
5884 | thread_args.obfd = obfd; |
5885 | thread_args.note_data = note_data; | |
5886 | thread_args.note_size = note_size; | |
65554fef MS |
5887 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
5888 | ||
be4d1333 MS |
5889 | if (thread_args.note_data == note_data) |
5890 | { | |
5891 | /* iterate_over_threads didn't come up with any threads; | |
5892 | just use inferior_ptid. */ | |
19958708 | 5893 | note_data = procfs_do_thread_registers (obfd, inferior_ptid, |
be4d1333 MS |
5894 | note_data, note_size); |
5895 | } | |
5896 | else | |
5897 | { | |
5898 | note_data = thread_args.note_data; | |
5899 | } | |
5900 | ||
5901 | make_cleanup (xfree, note_data); | |
5902 | return note_data; | |
5903 | } | |
65554fef MS |
5904 | #else /* !(Solaris or Unixware) */ |
5905 | static char * | |
5906 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5907 | { | |
5908 | error ("gcore not implemented for this host."); | |
5909 | return NULL; /* lint */ | |
5910 | } | |
5911 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5912 | /* =================== END GCORE .NOTE "MODULE" =================== */ |